阅读说明：本技术 一种自平衡医疗电动担架车 (Self-balancing medical electric stretcher vehicle ) 是由 刘红 于 2021-08-26 设计创作，主要内容包括：本发明属于医疗设备技术领域,具体的说是一种自平衡医疗电动担架车,包括床架、床体、行走轮组件和液压缸；本发明通过设置液压缸,进而行走轮组件和床架之间的距离能够通过液压缸进行调整,担架车在从救护车上向地面转移的过程中以及在斜坡上移动的过程中,医护人员只需要提供使床架保持水平的力就能实现担架车的平稳转移,进而方便病人的转移,同时医护人员不需要承受担架车和病人的重力,进而医护人员专注于保持床架的水平,进而使病人始终处于平躺状态,进而防止病人在转移的过程中产生二次伤害,进而防止二次伤害加剧病人的病情,进而使病人的病情保持稳定,进而有利于对病人进行治疗,进而有利于病人的康复。(The invention belongs to the technical field of medical equipment, and particularly relates to a self-balancing medical electric stretcher, which comprises a bedstead, a bed body, a walking wheel assembly and a hydraulic cylinder; according to the stretcher, the hydraulic cylinder is arranged, so that the distance between the walking wheel assembly and the bed frame can be adjusted through the hydraulic cylinder, the stretcher can be stably transferred by medical personnel only by providing force for keeping the bed frame horizontal in the process of transferring the stretcher from an ambulance to the ground and in the process of moving the stretcher on a slope, so that the patient can be conveniently transferred, meanwhile, the medical personnel do not need to bear the gravity of the stretcher and the patient, and the medical personnel are concentrated on keeping the bed frame horizontal, so that the patient is always in a flat lying state, the secondary injury of the patient in the transferring process is prevented, the illness state of the patient is prevented from being aggravated by the secondary injury, the illness state of the patient is kept stable, the treatment of the patient is facilitated, and the rehabilitation of the patient is facilitated.)

1. The utility model provides an electronic stretcher of self-balancing medical treatment which characterized in that: comprises a bedstead (1), a bed body (2), a walking wheel component (3) and a hydraulic cylinder (4); the bed body (2) is arranged above the bedstead (1); the bed body (2) is connected with the bedstead (1); the walking wheel assemblies (3) are uniformly arranged below the bedstead (1) at intervals; the hydraulic cylinder (4) is arranged between the walking wheel assembly (3) and the bedstead (1); the upper end of the hydraulic cylinder (4) is fixedly connected with the bedstead (1); a piston rod of the hydraulic cylinder (4) is connected with the walking wheel assembly (3); the two sides of the bedstead (1) are symmetrically provided with a first control component (5); the first control assembly (5) comprises a first pipeline (51) and a first electromagnetic valve (52); the two hydraulic cylinders (4) on the same side of the bedstead (1) are communicated through the first pipeline (51); two ends of the first pipeline (51) are respectively communicated with oil cavities of the two hydraulic cylinders (4) at two ends; the first pipeline (51) is provided with the first electromagnetic valve (52); the first electromagnetic valve (52) is fixedly connected with the bedstead (1); the first electromagnetic valve (52) is used for controlling the on-off of the first pipeline (51); a first switch (11) is arranged on the bedstead (1); the first switch (11) is fixedly connected with the bedstead (1); the first switch (11) is communicated with the two first electromagnetic valves (52) through electric signals.

2. The self-balancing medical electric stretcher according to claim 1, wherein: a second pipeline (53) and a third pipeline (54) are symmetrically arranged on two sides of the first electromagnetic valve (52); a second electromagnetic valve (55) and a first pump body (56) are arranged between the second pipeline (53) and the third pipeline (54); the second electromagnetic valve (55) is fixedly connected with the bedstead (1); the first pump body (56) is fixedly connected with the bedstead (1); one end of the second pipeline (53) is communicated with the first pipeline (51); the other end of the second pipeline (53) is communicated with one end of the second electromagnetic valve (55); the other end of the second electromagnetic valve (55) is communicated with one end of the first pump body (56); the other end of the first pump body (56) is communicated with one end of the third pipeline (54); the other end of the third pipeline (54) is communicated with the first pipeline (51); a controller (12), a horizontal sensor (13) and a storage battery (14) are arranged below the bed frame (1); the controller (12), the level sensor (13) and the storage battery (14) are respectively and fixedly connected with the bedstead (1); the level sensor (13) is in communication with the controller (12); the controller (12) is communicated with the first pump body (56); the first pump body (56) is communicated with the storage battery (14).

3. The self-balancing medical electric stretcher according to claim 2, wherein: a second switch (15) is arranged on the bedstead (1); the second switch (15) is fixedly connected with the bedstead (1); the second switch (15) is communicated with the controller (12).

4. The self-balancing medical electric stretcher according to claim 3, wherein: a pressure sensor (511) is arranged on the first pipeline (51); the pressure sensor (511) is communicated with the first pipeline (51); the pressure sensor (511) is in communication with the controller (12); the controller (12) converts the pressure value transmitted by the pressure sensor (511) into a weight value of the patient.

5. The self-balancing medical electric stretcher according to claim 4, wherein: the walking wheel assembly (3) comprises a roller (31) and a hinged seat (32); the roller (31) is rotationally connected with the hinged seat (32); a connecting seat (33) is arranged above the hinged seat (32); the upper end of the connecting seat (33) is symmetrically provided with two guide posts (34); the guide post (34) is fixedly connected with the connecting seat (33); the guide column (34) is connected with the lower end of the hydraulic cylinder (4) in a sliding manner; the end part of a piston rod of the hydraulic cylinder (4) is fixedly connected with the connecting seat (33); the two rollers (31) at one end of the bedstead (1) are steering wheels (311); the two rollers (31) at the other end of the bedstead (1) are driving wheels (312); the hinged seat (32) connected with the steering wheel (311) is rotationally connected with the corresponding connecting seat (33); the hinged seat (32) connected with the driving wheel (312) is fixedly connected with the corresponding connecting seat (33); the driving wheel (312) is provided with a mounting groove; a hub motor (313) is arranged in the mounting groove; the rotating part of the hub motor (313) is fixedly connected with the driving wheel (312); the fixed part of the hub motor (313) is fixedly connected with the hinge seat (32); the hub motor (313) is connected with the storage battery (14).

6. The self-balancing medical electric stretcher according to claim 5, wherein: a connecting component (6) is arranged at the joint of the bedstead (1) and the bed body (2); the connecting components (6) are uniformly arranged at intervals; the connecting assembly (6) comprises a connecting plate (61) and an elastic piece (62); the connecting plate (61) is fixedly connected with the bed body (2); the elastic piece (62) is arranged between the connecting plate (61) and the bedstead (1); the elastic pieces (62) are arranged at equal intervals; the upper end of the elastic piece (62) is fixedly connected with the connecting plate (61); the lower end of the elastic piece (62) is fixedly connected with the bedstead (1).

7. The self-balancing medical electric stretcher according to claim 6, wherein: the using method of the stretcher vehicle comprises the following steps:

s1: enabling a patient to lie on the stretcher, then turning on a switch of the hub motor (313) to enable the hub motor (313) to rotate, enabling the hub motor (313) to drive the rollers (31) to rotate, enabling the rollers (31) to drive the stretcher to move, and enabling the stretcher to transfer the patient to a destination under the auxiliary action of medical staff;

s2: when the stretcher vehicle meets a slope in the process of transferring a patient in S1, a medical worker at the lower end lifts the lower end of the bedstead (1) to keep the two ends of the bedstead (1) horizontal, then the medical worker opens the first switch (11), the first switch (11) transmits an electric signal to the first electromagnetic valve (52), the electric signal opens the first electromagnetic valve (52), hydraulic oil flows in the first pipeline (51) after the first electromagnetic valve (52) is opened, the roller (31) at the higher end is abutted on the slope, the piston rod of the hydraulic cylinder (4) at the higher end is compressed under the combined action of the gravity of the stretcher vehicle and the patient, the hydraulic oil in the hydraulic cylinder (4) at the higher end flows into the hydraulic cylinder (4) at the lower end, and the piston rod of the hydraulic cylinder (4) at the higher end is retracted, meanwhile, a piston rod of the hydraulic cylinder (4) at the lower end is extended out, the rollers (31) at the lower end are abutted against a slope, the rollers (31) at the two ends are abutted against the slope, the bedstead (1) and the patient are supported under the combined action of the rollers (31) at the two ends, and the medical staff can realize the stable movement of the patient on the slope only by keeping the two ends of the bedstead (1) horizontal;

s3: in the process of transferring the patient by the stretcher vehicle in S1, when the patient needs to be transferred from the ambulance to the ground, the medical staff firstly pushes the stretcher vehicle to the door of the ambulance, then one medical staff lifts one end of the stretcher vehicle outside the ambulance, the other medical staff pushes the stretcher vehicle in the ambulance with force, so that the stretcher vehicle moves out of the ambulance, the two rollers (31) at one end of the stretcher vehicle move out of the ambulance (at the moment, the two rollers (31) are in a suspended state), then the medical staff in the ambulance presses the first switch (11), the first switch (11) transmits an electric signal to the first electromagnetic valve (52), the electric signal enables the first electromagnetic valve (52) to be opened, and the piston rod of the hydraulic cylinder (4) in the ambulance is compressed under the combined action of the gravity of the stretcher vehicle and the patient at the moment when the first electromagnetic valve (52) is opened, the hydraulic oil in the hydraulic cylinder (4) in the ambulance flows into the hydraulic cylinder (4) outside the ambulance, the piston rod of the hydraulic cylinder (4) in the ambulance retracts, the piston rod of the hydraulic cylinder (4) outside the ambulance extends, two rollers (31) outside the ambulance are butted on the ground, all the rollers (31) can provide supporting force for the bedstead (1), the bedstead (1) and a patient are supported under the combined action of all the rollers (31), then the first switch (11) is closed, after the first switch (11) is closed, a medical worker pushes the stretcher vehicle outwards, after the two rollers (31) in the ambulance move to the position near the door of the ambulance, the stretcher vehicle stops being pushed, then the medical worker in the ambulance gets down from the door, and then the front medical worker and the back worker slightly lift the stretcher vehicle, the stretcher vehicle is moved out of the ambulance, the roller (31) close to one end of the ambulance door is in a suspended state, then the first switch (11) is turned on to slowly reduce the height of the bed frame (1), so that the hydraulic oil in the hydraulic cylinder (4) far away from one end of the ambulance door flows into the hydraulic cylinder (4) close to one end of the ambulance door, and a piston rod in the hydraulic cylinder (4) far away from one end of the ambulance door is retracted, simultaneously, a piston rod of the hydraulic cylinder (4) close to one end of the vehicle door is extended, the roller (31) close to one end of the vehicle door is abutted against the ground, all the roller (31) are abutted against the ground, all the roller (31) can provide supporting force for the bedstead (1), supporting the bedframe (1) and the patient under the combined action of all the rollers (31);

s4: in the process of transferring the patient by the stretcher vehicle in S1, when the stretcher vehicle moves to a slope, a control switch of the controller (12) is turned on to enable the controller (12) to work, the level sensor (13) transmits a signal to the controller (12), the controller (12) judges the inclination condition of the bed frame (1) according to the received signal, then the controller (12) controls the second electromagnetic valve (55) to be opened, meanwhile, the controller (12) controls the first pump body (56) to work, the first pump body (56) enables the hydraulic oil in the hydraulic cylinder (4) at the higher end to flow into the hydraulic cylinder (4) at the lower end through the first pipeline (51) to enable the piston rod in the hydraulic cylinder (4) at the higher end to retract, and simultaneously enables the piston rod of the hydraulic cylinder (4) at the lower end to extend, under the combined action of the hydraulic cylinders (4) at the two ends, the bed frame (1) is in a horizontal state, so that a patient can stably move on a slope;

s5: in the process of transferring patients by the stretcher vehicle in S1, when the patients need to be transferred to an ambulance, the patients are transferred to the door of the ambulance by the stretcher vehicle, the switch of the hub motor (313) is closed, then medical staff opens the control switch of the controller (12), at the moment, the first switch (11) automatically enters an off state, then the medical staff holds the stretcher vehicle with force to enable the stretcher vehicle to be in a horizontal state, then the medical staff opens the second switch (15), the second switch (15) transmits an electric signal to the controller (12), the controller (12) controls the second electromagnetic valve (55) to work, meanwhile, the controller (12) controls the first pump body (56) to work, and the first pump body (56) drives hydraulic oil of the hydraulic cylinder (4) to flow, hydraulic oil in the hydraulic cylinder (4) close to one end of the ambulance door flows into the hydraulic cylinder (4) at the other end, a piston rod of the hydraulic cylinder (4) close to one end of the ambulance door is retracted, a piston rod of the hydraulic cylinder (4) at the other end extends out, the bedstead (1) is slowly lifted under the auxiliary action of medical staff, the roller (31) close to one end of the ambulance door is slowly lifted, the second switch (15) is disconnected when the roller (31) close to one end of the ambulance door is higher than the bottom surface of the ambulance carriage, then the medical staff pushes the stretcher vehicle while keeping the stretcher vehicle horizontal, the stretcher vehicle moves into the ambulance, the roller (31) on the ground moves to be close to the ambulance door, the stretcher vehicle stops being pushed, and then the second switch (15) is opened, no. two switch (15) with the signal of telecommunication for controller (12), controller (12) control No. two solenoid valve (55) work, simultaneously controller (12) control No. one pump body (56) work, No. one pump body (56) drive hydraulic oil in the hydraulic pump flows, makes and is close to outside the ambulance car door hydraulic oil in pneumatic cylinder (4) to in the ambulance flow in pneumatic cylinder (4), make and be close to outside the ambulance car door the piston rod retraction of pneumatic cylinder (4) makes simultaneously in the ambulance car the piston rod of pneumatic cylinder (4) stretches out, makes under medical personnel's supplementary action bedstead (1) slowly rise, makes simultaneously and is close to outside the ambulance door gyro wheel (31) slowly rise, when outside the door gyro wheel (31) break off when being higher than ambulance car railway carriage bottom No. two switch (15), then the medical staff pushes the stretcher vehicle while keeping the stretcher vehicle horizontal, so that the stretcher vehicle moves into the ambulance, the stretcher vehicle stops pushing the stretcher vehicle after completely moving into the ambulance, and the ambulance transfers the patient to the hospital.

Technical Field

The invention belongs to the technical field of medical equipment, and particularly relates to a self-balancing medical electric stretcher.

Background

The medical single-frame vehicle is a common instrument used for rescuing patients or wounded persons in daily life, is mainly used when critically ill patients, particularly bedridden patients, are transferred among examination rooms, operation beds, sickbeds and the like in hospitals, can facilitate the transfer of the patients, avoids the secondary injury of the patients in the transfer process in the hospitals, is used for transferring the patients to the ambulance during emergency treatment, and then is transferred to the emergency room from the ambulance for emergency treatment, and can quickly transfer the patients to the emergency room, so that the patients can be treated quickly, the optimal treatment time is avoided, and the rehabilitation of the patients is facilitated.

In order to prevent secondary injury to a patient, the patient needs to be kept in a flat lying state in the transferring process, when the patient is transferred downwards from an ambulance, a medical worker is required to lift a stretcher vehicle from the ambulance, the medical worker needs to use great strength to transfer the patient when lifting the stretcher vehicle, the patient is inconvenient to transfer, in the transferring process, the stretcher vehicle and the patient are difficult to be in a horizontal state, the illness state of the patient is easy to aggravate, the patient can meet a slope road surface when being transferred in a hospital or other places, the patient cannot be kept in the flat lying state all the time when the medical vehicle walks on the slope, the secondary injury is easy to the patient, and the illness state of the patient is aggravated.

Disclosure of Invention

In order to make up the defects of the prior art, the invention provides a self-balancing medical electric stretcher. The stretcher cart is mainly used for solving the problems that when the existing stretcher cart transfers a patient downwards from an ambulance, a medical worker is required to lift the stretcher cart off from the ambulance, the medical worker can transfer the patient by using great strength when lifting the stretcher cart, the patient is inconvenient to transfer, in the transfer process, the stretcher cart and the patient are difficult to be in a horizontal state, the illness state of the patient is easy to aggravate, the patient can meet a slope road surface when transferring in a hospital or other places, the patient cannot be kept in a flat lying state all the time when the medical cart walks on the slope, the secondary injury is easy to be caused to the patient, and the illness state of the patient is aggravated.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides a self-balancing medical electric stretcher vehicle which comprises a bedstead, a bed body, a walking wheel assembly and a hydraulic cylinder, wherein the bedstead is arranged on the bed body; the bed body is arranged above the bed frame; the bed body is connected with the bed frame; the walking wheel assemblies are uniformly arranged below the bedstead at intervals; the hydraulic cylinder is arranged between the walking wheel assembly and the bedstead; the upper end of the hydraulic cylinder is fixedly connected with the bedstead; a piston rod of the hydraulic cylinder is connected with the travelling wheel assembly; the two sides of the bedstead are symmetrically provided with a first control assembly; the first control assembly comprises a first pipeline and a first electromagnetic valve; the two hydraulic cylinders on the same side of the bed frame are communicated through the first pipeline; two ends of the first pipeline are respectively communicated with oil cavities of the two hydraulic cylinders at two ends; the first pipeline is provided with the first electromagnetic valve; the first electromagnetic valve is fixedly connected with the bedstead; the first electromagnetic valve is used for controlling the on-off of the first pipeline; a first switch is arranged on the bedstead; the first switch is fixedly connected with the bedstead; the first switch is communicated with the first two electromagnetic valves through electric signals.

When the stretcher is in operation, a patient lies on the bed body, medical staff pushes the stretcher to move behind the walking direction of the stretcher, and then the patient is pushed to move, so that the patient is transferred from an ambulance to an emergency room for emergency treatment, or the patient is transferred to an operating room, an emergency room, an examination room or a ward, and the patient lies on the stretcher during the transfer process, so that the patient is convenient to transfer, meanwhile, the patient and the stretcher are kept in a relatively static state during the transfer process, and further the patient is prevented from moving relative to the bed body during the transfer process, so that the patient is prevented from generating secondary injury during the relative movement, and further the probability of the patient generating secondary injury is reduced, so that the condition of the patient is prevented from being aggravated by the secondary injury, the condition of the patient is kept stable, the patient is further treated, and the recovery of the patient is further facilitated; at present, when a patient is transferred downwards from an ambulance, a medical worker is required to lift a stretcher vehicle off the ambulance, the medical worker needs to use great strength to transfer the patient when lifting the stretcher vehicle, the patient is inconvenient to transfer, in the transferring process, the stretcher vehicle and the patient are difficult to be in a horizontal state, the patient can move relatively, secondary injury is easily caused to the patient, the illness state of the patient is aggravated, the patient can meet a slope road surface when transferring in a hospital or other places, the patient can not be kept in a flat lying state all the time when the medical vehicle walks on the slope, the patient can move relatively, the secondary injury is easily caused to the patient, the illness state of the patient is aggravated, the rehabilitation of the patient is not facilitated, the hydraulic cylinder is arranged between a walking wheel component and a bed frame, and the distance between the walking wheel component and the bed frame can be adjusted through the hydraulic cylinder, when a patient needs to be transferred from the ambulance, a medical worker pushes the stretcher vehicle to the door of the ambulance, then one medical worker lifts one end of the stretcher vehicle outside the ambulance, the other medical worker pushes the stretcher vehicle in the ambulance with force, so that the two walking wheel assemblies at one end of the stretcher vehicle move out of the ambulance (at the moment, the two walking wheel assemblies are in a suspended state), then the medical worker in the ambulance presses a switch, the switch opens the electromagnetic valves on the two pipelines, at the moment when the electromagnetic valve is opened, because the two walking wheel assemblies in the ambulance bear the gravity of the patient and the stretcher vehicle, and the two walking wheel assemblies outside the ambulance are in a suspended state, the pressure of the hydraulic oil in the two hydraulic cylinders at one end bearing the gravity is higher than the pressure of the hydraulic oil in the other two hydraulic cylinders (the hydraulic cylinders at one end of the walking wheel assemblies in the suspended state), then the hydraulic oil in the hydraulic cylinder at one end bearing the gravity flows into the hydraulic cylinder at the other end suspended in the air through a first pipeline, so that the piston rod of the hydraulic cylinder at the other end bearing the gravity retracts, the piston rod of the hydraulic cylinder at the other end suspended in the air extends out, the traveling wheel assembly at the other end suspended in the air is abutted against the ground, all the traveling wheel assemblies provide supporting force for the bed frame, and therefore medical personnel can realize the stable movement of the stretcher only by providing force for keeping the bed frame horizontal, when the two traveling wheel assemblies of the ambulance move to the position near the vehicle door, the medical personnel in the ambulance get off the vehicle door, then the front medical personnel and the rear medical personnel slightly lift the stretcher, and further the stretcher moves out of the ambulance, then the two medical personnel slowly reduce the height of the stretcher, so that the hydraulic oil in the hydraulic cylinders flows, and finally the hydraulic oil in each hydraulic cylinder is kept equal, at the moment, the extension lengths of the piston rods of the hydraulic cylinders are consistent, so that the bed frame is in a horizontal state, the bed body is in a horizontal state, and the medical staff can realize the stable movement of the stretcher only by providing force for keeping the bed frame horizontal (the stretcher needs to be lifted by force at the last moment when the stretcher is moved out of the ambulance and the ambulance is moved out, but the force action time is short and can be ignored), so that the stretcher is convenient to be moved off from the ambulance, and further the patient is convenient to be transferred, meanwhile, the medical staff does not need to bear the gravity of the stretcher and the patient, so that the medical staff is absorbed in keeping the bed frame horizontal, and further the stretcher is always in a horizontal state, so that the patient is always in a horizontal state, and further the patient is prevented from moving relatively under the ambulance, and further the patient is prevented from generating secondary injury during the relative movement, thereby reducing the probability of secondary injury of the patient, preventing the secondary injury from aggravating the state of the patient, further keeping the state of the patient stable, further being beneficial to treating the patient and further being beneficial to the rehabilitation of the patient; when the stretcher vehicle is in a stable state on the ground, the first switch is closed, the first electromagnetic valve is further closed, hydraulic oil is further prevented from continuously flowing in the first pipeline, the pressure of the hydraulic oil in all the hydraulic cylinders is kept unchanged, the stretcher vehicle is further in a horizontal state, and further the transfer of a patient is facilitated, when a slope is encountered in a hospital, the front medical personnel and the back medical personnel enable the stretcher vehicle to be in the horizontal state, then the first switch is pressed down, the hydraulic oil is further enabled to move in the first pipeline, the extending lengths of piston rods of all the hydraulic cylinders are further adjusted, all the walking wheel assemblies are further simultaneously abutted against the ground, further all the walking wheel assemblies jointly provide supporting force for the stretcher vehicle, further the medical personnel only need to provide force enabling the bed frame to be kept horizontal, the stable movement of the stretcher vehicle can be achieved, and further the stretcher vehicle can be conveniently moved on the slope, and then make things convenient for patient's transfer, make patient be in the state of lying down all the time on the slope simultaneously, and then prevent that patient from producing relative movement when shifting on the slope, and then prevent that patient from producing the secondary injury when relative movement, and then reduce patient and produce the probability of secondary injury, and then prevent the state of an illness of secondary injury aggravation patient, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery.

Preferably, a second pipeline and a third pipeline are symmetrically arranged on two sides of the first electromagnetic valve; a second electromagnetic valve and a first pump body are arranged between the second pipeline and the third pipeline; the second electromagnetic valve is fixedly connected with the bedstead; the first pump body is fixedly connected with the bedstead; one end of the second pipeline is communicated with the first pipeline; the other end of the second pipeline is communicated with one end of the second electromagnetic valve; the other end of the second electromagnetic valve is communicated with one end of the first pump body; the other end of the first pump body is communicated with one end of the third pipeline; the other end of the third pipeline is communicated with the first pipeline; a controller, a horizontal sensor and a storage battery are arranged below the bedstead; the controller, the level sensor and the storage battery are respectively and fixedly connected with the bedstead; the level sensor is in communication with the controller; the controller is communicated with the first pump body; the first pump body is communicated with the storage battery.

The controller is arranged (a control switch is arranged on the controller, the first switch is automatically closed when the control switch is opened, the first switch is automatically closed when the first switch is opened), the control switch is opened, the controller works, when the bed frame is in an inclined state, the level sensor transmits a signal to the controller, the controller judges the inclined state of the bed frame according to the received signal, the controller controls the second electromagnetic valve to be opened, the controller controls the first pump body to work simultaneously, the controller drives hydraulic oil to move in the first pipeline, the hydraulic oil quantity in the hydraulic cylinders at two ends is changed, the extension length of the piston rods of the hydraulic cylinders at two ends is changed, the bed frame is always kept in a horizontal state, the bed body is automatically kept in a horizontal state on an incline, and at the moment, medical personnel only need to push the stretcher vehicle to move to realize the stable movement of a patient on the incline, and then avoid medical personnel to lift the stretcher with force and make the stretcher keep level, and then make things convenient for patient's removal, and then improve the convenience that the stretcher used, the while controller adjusts the bed body according to the slope state of the bed body often, and then make the bed body can both be in the horizontality all the time on the slope of different slopes, and then make patient be in the state of lying down all the time when shifting on the slope, and then prevent that patient from producing relative movement when shifting on the slope, and then prevent that patient from producing the secondary injury when relative movement, and then reduce patient's probability that patient produced the secondary injury, and then prevent that the secondary injury aggravates patient's the state of an illness, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery.

Preferably, a second switch is arranged on the bed frame; the second switch is fixedly connected with the bedstead; the second switch is communicated with the controller.

By arranging the second switch, when a stretcher vehicle is used for transferring a patient to an ambulance from the ground, the patient is transferred to the door of the ambulance through the stretcher vehicle, then medical staff opens a control switch of the controller, the first switch automatically enters a disconnection state, then the medical staff holds the stretcher vehicle with force to enable the stretcher vehicle to be in a horizontal state, then the medical staff opens the second switch, the second switch transmits an electric signal to the controller, the controller controls the second electromagnetic valve to work, simultaneously the controller controls the first pump body to work, the first pump body drives hydraulic oil in the hydraulic pump to flow, the hydraulic oil in the hydraulic cylinder close to one end of the door of the ambulance flows into the hydraulic cylinder at the other end, the piston rod of the hydraulic cylinder close to one end of the door of the ambulance retracts, and the piston rod of the hydraulic cylinder at the other end extends out, then the bed frame is slowly lifted under the assistance of medical staff, the walking wheel component close to one end of the vehicle door is slowly lifted, when the walking wheel component close to one end of the vehicle door is higher than the bottom surface of the compartment of the ambulance, the second switch is switched off, then the medical staff forcibly pushes the stretcher vehicle while keeping the stretcher vehicle horizontal, and further the stretcher vehicle moves into the ambulance, after the walking wheel component on the ground moves to the position close to the door of the ambulance, the stretcher vehicle stops being pushed, then the second switch is switched on, and further the second switch transmits an electric signal to the controller, and further the controller controls the second electromagnetic valve to work, and simultaneously the controller controls the first pump body to work, and further the first pump body drives the hydraulic oil in the hydraulic pump to flow, so that the hydraulic oil in the hydraulic cylinder close to the outside of the door of the ambulance flows into the hydraulic cylinder in the ambulance, and further the piston rod of the hydraulic cylinder close to the outside of the ambulance door retracts, simultaneously, a piston rod of a hydraulic cylinder in the ambulance extends out, so that the bedstead is slowly lifted under the auxiliary action of medical personnel, the walking wheel component close to the outside of the ambulance door is slowly lifted, when the walking wheel component outside the ambulance door is higher than the bottom surface of the ambulance carriage, a second switch is switched off, then the medical personnel forcibly pushes the stretcher vehicle while keeping the stretcher vehicle horizontal, so that the stretcher vehicle is completely moved into the ambulance to move, the ambulance transfers the patient to a hospital, further the patient is transferred onto the hospital, the bedstead is always in a horizontal state when the stretcher vehicle is transferred onto the ambulance, further the patient is always in a flat lying state, further the patient is prevented from moving relative to the bedstead when being transferred onto the ambulance, further the patient is prevented from generating secondary injury when being moved relative to the ambulance, further the probability of the patient generating the secondary injury is reduced, further the condition of the patient is prevented from being aggravated by the secondary injury, and then make patient's state of an illness keep stable, and then be favorable to treating patient, and then be favorable to patient's recovery, and when the stretcher shifts toward the ambulance, medical personnel only need provide make the bedstead keep the level and promote the power that the bedstead removed just can realize the shift of stretcher, and then lighten medical personnel's load, and then make things convenient for the shift of patient (the working process of stretcher when going up the step is unanimous with the process of last ambulance, not specifically described).

Preferably, a pressure sensor is arranged on the first pipeline; the pressure sensor is communicated with the first pipeline; the pressure sensor is communicated with the controller; the controller converts the pressure value transmitted by the pressure sensor into the weight value of the patient.

The in-process of transferring patient through the stretcher, open a switch, and then make the hydraulic oil of both ends pneumatic cylinder be in the connected state, and then pressure sensor transmits the pressure signal of hydraulic oil (this pressure produces for patient's gravity and stretcher gravity jointly) for the controller, and then the controller turns into patient's weight with the pressure value of hydraulic oil through the formula of setting for, and then obtain patient's weight, and then add dose and nutrient composition according to patient's weight, and then be favorable to patient's recovery, avoid carrying out special weighing to patient simultaneously, and then avoid weighing the in-process and cause No. two injuries to patient, and then prevent secondary injury aggravation patient's the state of an illness, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery.

Preferably, the walking wheel assembly comprises a roller and a hinge seat; the roller is rotationally connected with the hinge seat; a connecting seat is arranged above the hinged seat; two guide posts are symmetrically arranged at the upper end of the connecting seat; the guide post is fixedly connected with the connecting seat; the guide post is connected with the lower end of the hydraulic cylinder in a sliding manner; the end part of a piston rod of the hydraulic cylinder is fixedly connected with the connecting seat; the two rollers at one end of the bedstead are steering wheels; the two rollers at the other end of the bedstead are driving wheels; the hinged seat connected with the steering wheel is rotationally connected with the corresponding connecting seat; the hinged seat connected with the driving wheel is fixedly connected with the corresponding connecting seat; the driving wheel is provided with a mounting groove; a hub motor is arranged in the mounting groove; the rotating part of the hub motor is fixedly connected with the driving wheel; the fixed part of the hub motor is fixedly connected with the hinge seat; the hub motor is connected with the storage battery.

Through setting up the directive wheel, and then make things convenient for the stretcher to turn to, through setting up in-wheel motor, in-wheel motor drives the drive wheel when rotating and rotates, and then makes the drive wheel subaerial roll, and then drives the drive wheel and subaerial removal, and then drives the stretcher and subaerial removal, and then avoids the manpower to promote the stretcher removal, and then conveniently shifts patient, alleviates medical personnel's load simultaneously, and then improves the convenience that the stretcher used.

Preferably, a connecting component is arranged at the joint of the bed frame and the bed body; the connecting components are uniformly arranged at intervals; the connecting assembly comprises a connecting plate and an elastic piece; the connecting plate is fixedly connected with the bed body; the elastic piece is arranged between the connecting plate and the bedstead; the elastic pieces are uniformly arranged at intervals; the upper end of the elastic piece is fixedly connected with the connecting plate; the lower end of the elastic piece is fixedly connected with the bedstead.

When the stretcher vehicle is transversely collided, transverse collision force is transmitted to the elastic piece through the bedstead, so that the elastic piece deforms, then the transverse collision force is transmitted to the bed body through the elastic piece, and finally the transverse collision force is transmitted to a patient; when the stretcher walks on rugged ground, the rollers vibrate up and down, vibration energy is further transmitted to the elastic piece, the elastic piece vibrates up and down, then the elastic piece transmits the vibration energy to a patient, the vibration energy is absorbed by the elastic piece in the process of vibrating up and down, the vibration energy transmitted to the patient is further reduced, further, the damage to the patient caused by vibration is reduced, further, the probability of secondary damage to the patient is reduced, further, the illness state of the patient is kept stable, further, the stretcher is favorable for treating the patient, and further, the rehabilitation of the patient is facilitated.

Preferably, the use method of the stretcher comprises the following steps:

s1: enabling a patient to lie on the stretcher vehicle, then turning on a switch of the hub motor to enable the hub motor to rotate, driving the roller wheels to rotate by the hub motor, driving the stretcher vehicle to move by the roller wheels, and transferring the patient to a destination by the stretcher vehicle under the assistance of medical staff; when using the stretcher to shift the patient, make patient's tie lie on the bed body, open wheel hub motor's switch, and then make wheel hub motor rotate, and then wheel hub motor drives the stretcher and moves subaerial, and then shift patient to destination (operating room, inspection room, ward etc.) under medical personnel's auxiliary action, shift patient's in-process medical personnel only need provide the power that changes stretcher moving direction and just can realize patient's transfer, and then conveniently shift patient, alleviate medical personnel's load simultaneously, and then improve the convenience that the stretcher used.

S2: when the stretcher vehicle meets a slope in the process of transferring a patient in S1, a medical worker at the lower end lifts the lower end of the bedstead to keep the two ends of the bedstead horizontal, then the medical worker opens the first switch, the first switch transmits an electric signal to the first electromagnetic valve, the electric signal opens the first electromagnetic valve, hydraulic oil flows in the first pipeline after the first electromagnetic valve is opened, the roller at the higher end abuts against the slope, the piston rod of the hydraulic cylinder at the higher end is compressed under the combined action of the stretcher vehicle and the gravity of the patient, the hydraulic oil in the hydraulic cylinder at the higher end flows into the hydraulic cylinder at the lower end, the piston rod of the hydraulic cylinder at the higher end retracts, the piston rod of the hydraulic cylinder at the lower end extends out, and the roller at the lower end abuts against the slope, at the moment, the rollers at the two ends are abutted against the slope, the bed frame and the patient are supported under the combined action of the rollers at the two ends, and the medical staff can realize the stable movement of the patient on the slope only by keeping the two ends of the bed frame horizontal; when a patient needs to move on a slope, the medical staff at the lower end lifts the lower end of the bedstead to keep the two ends of the bedstead horizontal, then the medical staff opens the first switch, then the first switch transmits an electric signal to the first electromagnetic valve, then the electric signal enables the first electromagnetic valve to be opened, hydraulic oil flows in the first pipeline after the first electromagnetic valve is opened, and because the roller at the higher end is abutted against the slope, the piston rod of the hydraulic cylinder at the higher end is compressed under the combined action of the stretcher and the gravity of the patient, so that the hydraulic oil in the hydraulic cylinder at the higher end flows into the hydraulic cylinder at the lower end, the piston rod of the hydraulic cylinder at the higher end is retracted, and simultaneously the piston rod of the hydraulic cylinder at the lower end is extended, so that the roller at the lower end is abutted against the slope, and all the rollers are abutted against the slope, and then every gyro wheel provides the holding power to the stretcher, and then under the combined action under all gyro wheels play bedstead and patient, and then drive patient and move on the slope under the combined action with in-wheel motor, and then realize the transfer of patient on the slope, and the in-process medical personnel that shift just need make the both ends of bedstead keep the level just can realize the steady movement of patient on the slope, and then prevent that patient from producing relative movement when shifting on the slope, and then prevent that patient from producing the secondary injury when relative movement, and then reduce patient and produce the probability of secondary injury, and then prevent the state of an illness of secondary injury aggravation patient, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery.

S3: in the process of transferring the patient by the stretcher vehicle in S1, when the patient needs to be transferred from the ambulance to the ground, the medical staff firstly pushes the stretcher vehicle to the door of the ambulance, then one medical staff lifts one end of the stretcher vehicle outside the ambulance, the other medical staff pushes the stretcher vehicle in the ambulance with force, so that the stretcher vehicle moves out of the ambulance, the two rollers at one end of the stretcher vehicle move out of the ambulance (at the moment, the two rollers are in a suspended state), then the medical staff in the ambulance presses the first switch, the first switch transmits an electric signal to the first electromagnetic valve, the electric signal opens the first electromagnetic valve, and the piston rod of the hydraulic cylinder in the ambulance is compressed under the combined action of the stretcher vehicle and the gravity of the patient at the moment when the first electromagnetic valve is opened, the hydraulic oil in the hydraulic cylinder in the ambulance flows into the hydraulic cylinder outside the ambulance, a piston rod of the hydraulic cylinder in the ambulance retracts, a piston rod of the hydraulic cylinder outside the ambulance extends out, two rollers outside the ambulance are butted on the ground, all the rollers can provide supporting force for the bedstead at the moment, the bedstead and a patient are supported under the combined action of all the rollers, then the first switch is closed, medical staff pushes the stretcher vehicle outwards after the first switch is closed, after the two rollers in the ambulance move to the position near the door of the ambulance, the stretcher vehicle stops being pushed, the medical staff in the ambulance gets down from the door, then the front medical staff and the back medical staff lift the stretcher vehicle slightly to move the stretcher vehicle out of the ambulance, at the moment, the rollers near one end of the door of the ambulance are in a suspended state, then, the first switch is opened, the height of the bed frame is slowly reduced, hydraulic oil in the hydraulic cylinder far away from one end of the ambulance door flows into the hydraulic cylinder near one end of the ambulance door, a piston rod in the hydraulic cylinder far away from one end of the ambulance door is retracted, a piston rod in the hydraulic cylinder near one end of the ambulance door is extended, the roller near one end of the ambulance door is abutted against the ground, all the rollers are abutted against the ground, all the rollers can provide supporting force for the bed frame, and the bed frame and a patient are supported under the combined action of all the rollers; when a patient needs to be transferred to the ground from an ambulance by using a stretcher vehicle, firstly, the door of the ambulance is opened, then, medical staff firstly pushes the stretcher vehicle to the door of the ambulance, then, one medical staff lifts one end of the stretcher vehicle outside the ambulance, the other medical staff forcibly pushes the stretcher vehicle in the ambulance to move the stretcher vehicle out of the ambulance, so that two rollers at one end of the stretcher vehicle move out of the ambulance (at the moment, the two rollers are in a suspended state), then, the medical staff in the ambulance presses down a switch, the switch transmits an electric signal to an electromagnetic valve, the electromagnetic valve is opened by the electric signal, a piston rod of a hydraulic cylinder in the ambulance is compressed under the combined action of the gravity of the stretcher vehicle and the patient at the moment when the electromagnetic valve is opened, and then, hydraulic oil in the hydraulic cylinder in the ambulance flows into the hydraulic cylinder outside the ambulance, then the piston rod of the hydraulic cylinder in the ambulance retracts, and simultaneously the piston rod of the hydraulic cylinder outside the ambulance extends out, so that two idler wheels outside the ambulance are butted on the ground, all the idler wheels can provide supporting force for the bed frame, the bed frame and the patient are supported under the combined action of all the idler wheels, then the first switch is closed, after the first switch is closed, the medical personnel pushes the stretcher vehicle outwards, so that the stretcher vehicle moves towards the outside of the ambulance, after the two idler wheels in the ambulance move to the position near the door of the ambulance, the pushing of the stretcher vehicle is stopped, then the medical personnel in the ambulance get down from the door, then the front medical personnel and the back medical personnel slightly lift the stretcher vehicle, so that the stretcher vehicle moves out of the ambulance, at the moment, the idler wheel close to one end of the door of the ambulance is in a suspended state, then the first switch is opened, the height of the bed frame is slowly reduced, and further, hydraulic oil in the hydraulic cylinder far away from one end of the door of the ambulance flows into the hydraulic cylinder close to one end of the door of the hydraulic cylinder And then the piston rod in the hydraulic cylinder far away from one end of the ambulance door retracts, and simultaneously the piston rod of the hydraulic cylinder near one end of the ambulance door extends, so that the roller near one end of the ambulance door is abutted against the ground, and at the moment, all the rollers are abutted against the ground, and at the moment, all the rollers can provide supporting force for the bedstead, and the bedstead and the patient are supported under the combined action of all the rollers, when the stretcher vehicle is transferred from the ambulance to the ground, the medical staff can realize the stable movement of the stretcher vehicle only by providing the force for keeping the bedstead horizontal (the stretcher vehicle is required to be lifted by force at the last moment when the ambulance is just moved out and is moved out, but the force action time is very short, so that the force can be ignored), and further the stretcher vehicle is convenient to be transferred from the ambulance, and further the transfer of the patient is convenient, and meanwhile, the medical staff does not need to bear the gravity of the stretcher vehicle and the patient, then the medical staff is absorbed in keeping the bed frame level, so that the stretcher vehicle is always in a horizontal state, further the patient is always in a flat lying state, further the patient is prevented from moving relatively under the ambulance, further the patient is prevented from generating secondary injury during the relative movement, further the probability of the patient generating secondary injury is reduced, further the secondary injury is prevented from aggravating the illness state of the patient, further the illness state of the patient is kept stable, further the patient is favorably treated, and further the rehabilitation of the patient is favorably realized (the working process of the stretcher vehicle when going down the step is consistent with the process of going down the ambulance); when patient need keep certain slope because special wound (or after the operation), medical personnel make the bedstead keep certain slope according to patient's particular case, the piston rod of pneumatic cylinder is adjusted automatically this moment, and then support bedstead and patient under the effect of gyro wheel, medical personnel only need provide the power that makes the bedstead keep fixed slope and just can realize patient's transfer, and then make things convenient for patient's transfer, and the angle of slope is adjusted by medical personnel in real time, and then make patient keep the slope of certain angle on the road surface of difference all the time, and then improve the application range of stretcher.

S4: during the transfer of the stretcher to the patient in S1, when the stretcher is moved to the slope, the control switch of the controller is turned on to enable the controller to work, at the moment, the level sensor transmits a signal to the controller, the controller judges the inclination condition of the bed frame according to the received signal, and then the controller controls the second electromagnetic valve to be opened, meanwhile, the controller controls the first pump body to work, the first pump body enables hydraulic oil in the hydraulic cylinder at the higher end to flow into the hydraulic cylinder at the lower end through the first pipeline, a piston rod in the hydraulic cylinder at the higher end is retracted, and a piston rod of the hydraulic cylinder at the lower end is extended, the bed frame is in a horizontal state under the combined action of the hydraulic cylinders at the two ends, so that the patient can stably move on the slope; when the stretcher vehicle moves to a slope, a control switch of the controller is turned on, the controller works, then the level sensor transmits a signal to the controller, the controller judges the inclination condition of the bed frame according to the received signal, the controller controls the second electromagnetic valve to be turned on, the controller controls the first pump body to work at the same time, the hydraulic oil is driven to move in the first pipeline, the hydraulic oil in the hydraulic cylinder at the higher end flows into the hydraulic cylinder at the lower end through the first pipeline, the piston rod in the hydraulic cylinder at the higher end retracts, the piston rod of the hydraulic cylinder at the lower end extends out, the bed frame is in a horizontal state under the combined action of the hydraulic cylinders at the two ends, the bed body automatically keeps a horizontal state on the slope, and then the bed body drives a patient to move on the slope under the combined action of the bed body and the hub motor, and then realize the transfer of patient on slope, the in-process of transfer, medical personnel only need provide the power that changes stretcher moving direction and just can realize patient's transfer, and then conveniently shift patient, alleviate medical personnel's load simultaneously, and then improve the convenience that the stretcher used, and the in-process medical personnel that shifts only need make the both ends of bedstead keep the level just can realize patient's steady movement on slope, and then prevent that patient from producing relative movement when shifting on slope, and then prevent that patient from producing secondary injury when relative movement, and then reduce patient and produce the probability of secondary injury, and then prevent that secondary injury aggravates patient's the state of an illness, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery.

S5: in the process of transferring a patient by the stretcher vehicle in S1, when the patient needs to be transferred to an ambulance, the patient is transferred to a door of the ambulance by the stretcher vehicle, the switch of the hub motor is turned off, then a medical worker turns on the control switch of the controller, the first switch automatically enters an off state, then the medical worker holds the stretcher vehicle with force to enable the stretcher vehicle to be in a horizontal state, then the medical worker turns on the second switch, the second switch transmits an electric signal to the controller, the controller controls the second electromagnetic valve to work, the controller controls the first pump body to work, the first pump body drives hydraulic oil of the hydraulic cylinder to flow, and the hydraulic oil in the hydraulic cylinder close to one end of the ambulance door flows into the hydraulic cylinder at the other end, the piston rod of the hydraulic cylinder close to one end of the ambulance door is retracted, the piston rod of the hydraulic cylinder at the other end is extended out, the bedstead is slowly lifted under the auxiliary action of medical staff, the roller close to one end of the ambulance door is slowly lifted, the second switch is disconnected when the roller close to one end of the ambulance door is higher than the bottom surface of the ambulance carriage, then the medical staff pushes the stretcher vehicle while keeping the stretcher vehicle horizontal, the stretcher vehicle moves into the ambulance, the pushing of the stretcher vehicle is stopped after the roller on the ground moves to be close to the ambulance door, then the second switch is opened, the second switch transmits an electric signal to the controller, the controller controls the second electromagnetic valve to work, meanwhile, the controller controls the first pump body to work, and the first pump body drives hydraulic oil in the hydraulic pump to flow, enabling hydraulic oil in the hydraulic cylinder close to the outside of the ambulance door to flow into the hydraulic cylinder in the ambulance, enabling a piston rod of the hydraulic cylinder close to the outside of the ambulance door to retract, enabling a piston rod of the hydraulic cylinder in the ambulance to extend out, enabling the bedstead to rise slowly under the assistance of medical personnel, enabling the roller close to the outside of the ambulance door to rise slowly, disconnecting the second switch when the roller outside the ambulance door is higher than the bottom surface of the ambulance carriage, then enabling the medical personnel to push the stretcher vehicle while keeping the stretcher vehicle horizontal, enabling the stretcher vehicle to move into the ambulance, stopping pushing the stretcher vehicle after the stretcher vehicle completely moves into the ambulance, and transferring a patient to a hospital by the ambulance; when a patient needs to be transferred to an ambulance from the ground in the process of transferring the patient by using the stretcher vehicle, the patient is transferred to the door of the ambulance by the stretcher vehicle, then the switch of the hub motor is closed, then a medical worker turns on the control switch of the controller, the first switch automatically enters the off state at the moment, the medical worker holds the stretcher vehicle with force to enable the stretcher vehicle to be in the horizontal state, then the medical worker turns on the second switch, the second switch transmits an electric signal to the controller, the controller controls the second electromagnetic valve to work, the controller controls the first pump body to work, the first pump body drives hydraulic oil in the hydraulic pump to flow, the hydraulic oil in the hydraulic cylinder close to one end of the door of the ambulance flows into the hydraulic cylinder at the other end, and the piston rod of the hydraulic cylinder close to one end of the door of the ambulance retracts, simultaneously, a piston rod of the hydraulic cylinder at the other end extends out, so that the bed frame is slowly lifted under the auxiliary action of medical staff, the roller wheel close to one end of the car door is slowly lifted, the second switch is switched off when the roller wheel close to one end of the car door is higher than the bottom surface of the carriage of the ambulance, then the medical staff pushes the stretcher vehicle while keeping the stretcher vehicle horizontal, so that the stretcher vehicle moves into the ambulance, after the roller wheel on the ground moves to the position close to the car door of the ambulance, the stretcher vehicle stops being pushed, the second switch is switched on, further, the second switch transmits an electric signal to the controller, further, the controller controls the second electromagnetic valve to work, simultaneously, the controller controls the first pump body to work, further, the first pump body drives hydraulic oil in the hydraulic pump to flow, further, hydraulic oil in the hydraulic cylinder close to the outside of the door of the ambulance flows into the hydraulic cylinder in the ambulance, further, the piston rod of the hydraulic cylinder close to the outside of the ambulance door retracts, simultaneously, a piston rod of a hydraulic cylinder in the ambulance extends out, so that the bedstead is slowly lifted under the auxiliary action of medical personnel, simultaneously, the roller wheels close to the outside of the ambulance door are slowly lifted, when the roller wheels outside the ambulance door are higher than the bottom surface of the ambulance carriage, a second switch is switched off, then the medical personnel push the stretcher vehicle while keeping the stretcher vehicle horizontal, so that the stretcher vehicle moves into the ambulance, the stretcher vehicle stops pushing the stretcher vehicle after the stretcher vehicle completely moves into the ambulance, the ambulance transfers the patient to a hospital, when the stretcher vehicle transfers to the ambulance, the bedstead is always in a horizontal state, so that the patient is always in a flat lying state, further, the patient is prevented from moving relative to the bedstead when transferring to the ambulance, further, the patient is prevented from generating secondary injury when moving relative to the bedstead, further, the probability of the patient generating the secondary injury is reduced, and further, the condition of the patient is prevented from being aggravated by the secondary injury, and then make patient's state of an illness keep stable, and then be favorable to treating patient, and then be favorable to patient's recovery, and when the stretcher shifts toward the ambulance, medical personnel only need provide make the bedstead keep the level and promote the power that the bedstead removed just can realize the shift of stretcher, and then lighten medical personnel's load, and then make things convenient for the shift of patient (the working process of stretcher when going up the step is unanimous with the process of last ambulance, not specifically described).

The invention has the following beneficial effects:

1. in the invention, the patient lies on the bed body, the medical staff pushes the stretcher vehicle to move behind the walking direction of the stretcher vehicle so as to push the patient to move, thereby transferring the patient from the ambulance to an emergency room for emergency treatment, or the patient is transferred to an operating room, an emergency room, an examination room or a ward, etc., and the patient lies on the stretcher during the transfer, thereby facilitating the transfer of the patient, simultaneously keeping the patient in a relatively static state with the stretcher in the transfer process, thereby preventing the patient from moving relative to the bed body in the transferring process and further preventing the patient from generating secondary injury in the relative movement process, thereby reducing the probability of secondary injury of the patient and further preventing the secondary injury from aggravating the illness state of the patient, thereby keeping the state of illness of the patient stable, being beneficial to treating the patient and further being beneficial to the rehabilitation of the patient; at present, when a patient is transferred downwards from an ambulance, a medical worker is required to lift a stretcher vehicle off the ambulance, the medical worker needs to use great strength to transfer the patient when lifting the stretcher vehicle, the patient is inconvenient to transfer, in the transferring process, the stretcher vehicle and the patient are difficult to be in a horizontal state, the patient can move relatively, secondary injury is easily caused to the patient, the illness state of the patient is aggravated, the patient can meet a slope road surface when transferring in a hospital or other places, the patient can not be kept in a flat lying state all the time when the medical vehicle walks on the slope, the patient can move relatively, the secondary injury is easily caused to the patient, the illness state of the patient is aggravated, the rehabilitation of the patient is not facilitated, the hydraulic cylinder is arranged between a walking wheel component and a bed frame, and the distance between the walking wheel component and the bed frame can be adjusted through the hydraulic cylinder, when a patient needs to be transferred from the ambulance, a medical worker pushes the stretcher vehicle to the door of the ambulance, then one medical worker lifts one end of the stretcher vehicle outside the ambulance, the other medical worker pushes the stretcher vehicle in the ambulance with force, so that the two walking wheel assemblies at one end of the stretcher vehicle move out of the ambulance (at the moment, the two walking wheel assemblies are in a suspended state), then the medical worker in the ambulance presses a switch, the switch opens the electromagnetic valves on the two pipelines, at the moment when the electromagnetic valve is opened, because the two walking wheel assemblies in the ambulance bear the gravity of the patient and the stretcher vehicle, and the two walking wheel assemblies outside the ambulance are in a suspended state, the pressure of the hydraulic oil in the two hydraulic cylinders at one end bearing the gravity is higher than the pressure of the hydraulic oil in the other two hydraulic cylinders (the hydraulic cylinders at one end of the walking wheel assemblies in the suspended state), then the hydraulic oil in the hydraulic cylinder at one end bearing the gravity flows into the hydraulic cylinder at the other end suspended in the air through a first pipeline, so that the piston rod of the hydraulic cylinder at the other end bearing the gravity retracts, the piston rod of the hydraulic cylinder at the other end suspended in the air extends out, the traveling wheel assembly at the other end suspended in the air is abutted against the ground, all the traveling wheel assemblies provide supporting force for the bed frame, and therefore medical personnel can realize the stable movement of the stretcher only by providing force for keeping the bed frame horizontal, when the two traveling wheel assemblies of the ambulance move to the position near the vehicle door, the medical personnel in the ambulance get off the vehicle door, then the front medical personnel and the rear medical personnel slightly lift the stretcher, and further the stretcher moves out of the ambulance, then the two medical personnel slowly reduce the height of the stretcher, so that the hydraulic oil in the hydraulic cylinders flows, and finally the hydraulic oil in each hydraulic cylinder is kept equal, at the moment, the extension lengths of the piston rods of the hydraulic cylinders are consistent, so that the bed frame is in a horizontal state, the bed body is in a horizontal state, and the medical staff can realize the stable movement of the stretcher only by providing force for keeping the bed frame horizontal (the stretcher needs to be lifted by force at the last moment when the stretcher is moved out of the ambulance and the ambulance is moved out, but the force action time is short and can be ignored), so that the stretcher is convenient to be moved off from the ambulance, and further the patient is convenient to be transferred, meanwhile, the medical staff does not need to bear the gravity of the stretcher and the patient, so that the medical staff is absorbed in keeping the bed frame horizontal, and further the stretcher is always in a horizontal state, so that the patient is always in a horizontal state, and further the patient is prevented from moving relatively under the ambulance, and further the patient is prevented from generating secondary injury during the relative movement, thereby reducing the probability of secondary injury of the patient, preventing the secondary injury from aggravating the state of the patient, further keeping the state of the patient stable, further being beneficial to treating the patient and further being beneficial to the rehabilitation of the patient; when the stretcher vehicle is in a stable state on the ground, the first switch is closed, the first electromagnetic valve is further closed, hydraulic oil is further prevented from continuously flowing in the first pipeline, the pressure of the hydraulic oil in all the hydraulic cylinders is kept unchanged, the stretcher vehicle is further in a horizontal state, and further the transfer of a patient is facilitated, when a slope is encountered in a hospital, the front medical personnel and the back medical personnel enable the stretcher vehicle to be in the horizontal state, then the first switch is pressed down, the hydraulic oil is further enabled to move in the first pipeline, the extending lengths of piston rods of all the hydraulic cylinders are further adjusted, all the walking wheel assemblies are further simultaneously abutted against the ground, further all the walking wheel assemblies jointly provide supporting force for the stretcher vehicle, further the medical personnel only need to provide force enabling the bed frame to be kept horizontal, the stable movement of the stretcher vehicle can be achieved, and further the stretcher vehicle can be conveniently moved on the slope, and then make things convenient for patient's transfer, make patient be in the state of lying down all the time on the slope simultaneously, and then prevent that patient from producing relative movement when shifting on the slope, and then prevent that patient from producing the secondary injury when relative movement, and then reduce patient and produce the probability of secondary injury, and then prevent the state of an illness of secondary injury aggravation patient, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery.

2. In the invention, the controller is arranged (the controller is provided with a control switch, when the control switch is turned on, the first switch is automatically turned off, when the first switch is turned on, the control switch is turned on, the controller works, when the bedstead is in an inclined state, the level sensor transmits a signal to the controller, the controller judges the inclined state of the bedstead according to the received signal, the controller controls the second electromagnetic valve to be turned on, simultaneously the controller controls the first pump body to work, the hydraulic oil is driven to move in the first pipeline, the hydraulic oil quantity in the hydraulic cylinders at two ends is changed, the extension length of the piston rods of the hydraulic cylinders at two ends is changed, the bedstead is always kept in a horizontal state, the bed body is automatically kept in a horizontal state on the slope, and at the moment, medical personnel only need to push the stretcher vehicle to move to realize the stable movement of a patient on the slope, and then avoid medical personnel to lift the stretcher with force and make the stretcher keep level, and then make things convenient for patient's removal, and then improve the convenience that the stretcher used, the while controller adjusts the bed body according to the slope state of the bed body often, and then make the bed body can both be in the horizontality all the time on the slope of different slopes, and then make patient be in the state of lying down all the time when shifting on the slope, and then prevent that patient from producing relative movement when shifting on the slope, and then prevent that patient from producing the secondary injury when relative movement, and then reduce patient's probability that patient produced the secondary injury, and then prevent that the secondary injury aggravates patient's the state of an illness, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery.

3. According to the invention, the second switch is arranged, when a stretcher vehicle is used for transferring a patient from the ground to an ambulance, the patient is transferred to the door of the ambulance through the stretcher vehicle, then a medical worker turns on a control switch of a controller, the first switch automatically enters a disconnection state, then the medical worker forcibly holds the stretcher vehicle to enable the stretcher vehicle to be in a horizontal state, then the medical worker turns on the second switch, the second switch transmits an electric signal to the controller, the controller controls the second electromagnetic valve to work, the controller controls the first pump body to work, the first pump body drives hydraulic oil in a hydraulic pump to flow, the hydraulic oil in the hydraulic cylinder close to one end of the door of the ambulance flows into the hydraulic cylinder at the other end, the piston rod of the hydraulic cylinder close to one end of the door of the ambulance retracts, and the piston rod of the hydraulic cylinder at the other end extends out, then the bed frame is slowly lifted under the assistance of medical staff, the walking wheel component close to one end of the vehicle door is slowly lifted, when the walking wheel component close to one end of the vehicle door is higher than the bottom surface of the compartment of the ambulance, the second switch is switched off, then the medical staff forcibly pushes the stretcher vehicle while keeping the stretcher vehicle horizontal, and further the stretcher vehicle moves into the ambulance, after the walking wheel component on the ground moves to the position close to the door of the ambulance, the stretcher vehicle stops being pushed, then the second switch is switched on, and further the second switch transmits an electric signal to the controller, and further the controller controls the second electromagnetic valve to work, and simultaneously the controller controls the first pump body to work, and further the first pump body drives the hydraulic oil in the hydraulic pump to flow, so that the hydraulic oil in the hydraulic cylinder close to the outside of the door of the ambulance flows into the hydraulic cylinder in the ambulance, and further the piston rod of the hydraulic cylinder close to the outside of the ambulance door retracts, simultaneously, a piston rod of a hydraulic cylinder in the ambulance extends out, so that the bedstead is slowly lifted under the auxiliary action of medical personnel, the walking wheel component close to the outside of the ambulance door is slowly lifted, when the walking wheel component outside the ambulance door is higher than the bottom surface of the ambulance carriage, a second switch is switched off, then the medical personnel forcibly pushes the stretcher vehicle while keeping the stretcher vehicle horizontal, so that the stretcher vehicle is completely moved into the ambulance to move, the ambulance transfers the patient to a hospital, further the patient is transferred onto the hospital, the bedstead is always in a horizontal state when the stretcher vehicle is transferred onto the ambulance, further the patient is always in a flat lying state, further the patient is prevented from moving relative to the bedstead when being transferred onto the ambulance, further the patient is prevented from generating secondary injury when being moved relative to the ambulance, further the probability of the patient generating the secondary injury is reduced, further the condition of the patient is prevented from being aggravated by the secondary injury, and then make patient's state of an illness keep stable, and then be favorable to treating patient, and then be favorable to patient's recovery, and when the stretcher shifts toward the ambulance, medical personnel only need provide make the bedstead keep the level and promote the power that the bedstead removed just can realize the shift of stretcher, and then lighten medical personnel's load, and then make things convenient for the shift of patient (the working process of stretcher when going up the step is unanimous with the process of last ambulance, not specifically described).

4. In the invention, the switch I is turned on in the process of transferring the patient through the stretcher, so that the hydraulic oil of the hydraulic cylinders at two ends is in a communicated state, the pressure sensor transmits a pressure signal of the hydraulic oil (the pressure is generated by the gravity of the patient and the gravity of the stretcher together) to the controller, the controller converts the pressure value of the hydraulic oil into the weight of the patient through a set formula, so as to obtain the weight of the patient, the dosage and the nutrient content are added according to the weight of the patient, so that the recovery of the patient is facilitated, meanwhile, the patient is prevented from being specially weighed, so that the patient is prevented from being subjected to secondary injury in the weighing process, the illness state of the patient is prevented from being aggravated by the secondary injury, the illness state of the patient is kept stable, the treatment of the patient is facilitated, and the recovery of the patient is facilitated.

5. According to the stretcher cart, the steering wheel is arranged, so that the stretcher cart can be conveniently steered, the in-wheel motor drives the driving wheel to rotate when rotating, the driving wheel rolls on the ground, the driving wheel is driven to move on the ground, the stretcher cart is driven to move on the ground, so that the phenomenon that the stretcher cart is pushed by manpower to move is avoided, the patient can be conveniently transferred, the load of medical staff is reduced, and the use convenience of the stretcher cart is improved.

Drawings

The invention will be further explained with reference to the drawings.

Fig. 1 is a schematic view of the overall structure of the stretcher of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is an enlarged view of a portion of FIG. 1 at B;

fig. 4 is a schematic view showing the construction of the frame of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 4 at C;

FIG. 6 is an enlarged view of a portion of FIG. 4 at D;

FIG. 7 is a schematic structural diagram of a control module I according to the present invention;

fig. 8 is a partial enlarged view at E in fig. 7;

in the figure: bedstead 1, first switch 11, controller 12, level sensor 13, battery 14, second switch 15, the bed body 2, walking wheel subassembly 3, gyro wheel 31, directive wheel 311, drive wheel 312, in-wheel motor 313, articulated seat 32, connecting seat 33, guide post 34, pneumatic cylinder 4, first control module 5, No. 51 pipeline, pressure sensor 511, No. 52 solenoid valve, No. 53 pipeline, No. 54 pipeline, No. 55 solenoid valve, No. 56 pump body, coupling assembling 6, connecting plate 61, elastic component 62.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1, 3, 4, 7 and 8, a self-balancing medical electric stretcher comprises a bed frame 1, a bed body 2, a walking wheel assembly 3 and a hydraulic cylinder 4; the bed body 2 is arranged above the bedstead 1; the bed body 2 is connected with the bedstead 1; the walking wheel assemblies 3 are uniformly arranged below the bedstead 1 at intervals; the hydraulic cylinder 4 is arranged between the walking wheel assembly 3 and the bedstead 1; the upper end of the hydraulic cylinder 4 is fixedly connected with the bedstead 1; a piston rod of the hydraulic cylinder 4 is connected with the walking wheel assembly 3; the two sides of the bedstead 1 are symmetrically provided with a first control component 5; the first control assembly 5 comprises a first pipeline 51 and a first electromagnetic valve 52; the two hydraulic cylinders 4 on the same side of the bed frame 1 are communicated through the first pipeline 51; two ends of the first pipeline 51 are respectively communicated with oil chambers of the two hydraulic cylinders 4 at two ends; the first electromagnetic valve 52 is arranged on the first pipeline 51; the first electromagnetic valve 52 is fixedly connected with the bedstead 1; the first electromagnetic valve 52 is used for controlling the on-off of the first pipeline 51; a first switch 11 is arranged on the bedstead 1; the first switch 11 is fixedly connected with the bedstead 1; the first switch 11 is communicated with the two first electromagnetic valves 52 through electric signals.

When in use, a patient lies on the bed body 2, medical staff pushes the stretcher vehicle to move behind the walking direction of the stretcher vehicle, and then pushes the patient to move, so that the patient is transferred from the ambulance to an emergency room for emergency treatment, or the patient is transferred to an operating room, an emergency room, an examination room or a ward, etc., and the patient lies on the stretcher during the transfer, thereby facilitating the transfer of the patient, simultaneously keeping the patient in a relatively static state with the stretcher in the transfer process, thereby preventing the patient from moving relative to the bed body 2 in the transferring process and further preventing the patient from generating secondary injury in the relative movement process, thereby reducing the probability of secondary injury of the patient and further preventing the secondary injury from aggravating the illness state of the patient, thereby keeping the state of illness of the patient stable, being beneficial to treating the patient and further being beneficial to the rehabilitation of the patient; at present, when a patient is transferred downwards from an ambulance, a medical worker is required to lift a stretcher vehicle off the ambulance, the medical worker is required to use great strength to transfer the patient when lifting the stretcher vehicle, the patient is inconvenient to transfer, in the transferring process, the stretcher vehicle and the patient are difficult to be in a horizontal state, the patient can move relatively, secondary injury is easily caused to the patient, the illness state of the patient is aggravated, the patient can meet a slope road surface when transferring in a hospital or other places, the patient can not be kept in a flat lying state all the time when the medical vehicle walks on the slope, the patient can move relatively, the secondary injury is easily caused to the patient, the illness state of the patient is aggravated, the rehabilitation of the patient is not facilitated, the hydraulic cylinder 4 is arranged between a walking wheel component 3 and a bed frame 1, and the distance between the walking wheel component 3 and the bed frame 1 can be adjusted through the hydraulic cylinder 4, when a patient needs to be transferred from the ambulance, a medical worker pushes the stretcher vehicle to the door of the ambulance, then one medical worker lifts one end of the stretcher vehicle outside the ambulance, the other medical worker pushes the stretcher vehicle in the ambulance with force, so that the two walking wheel assemblies 3 at one end of the stretcher vehicle move out of the ambulance (at the moment, the two walking wheel assemblies 3 are in a suspended state), then the medical worker in the ambulance presses the first switch 11, the first switch 11 opens the first electromagnetic valves 52 on the two first pipelines 51, and at the moment when the first electromagnetic valve 52 is opened, because the two walking wheel assemblies 3 in the ambulance bear the gravity of the patient and the stretcher vehicle, and the two walking wheel assemblies 3 outside the ambulance are in a suspended state, the pressure of hydraulic oil in the two hydraulic cylinders 4 at one end bearing the gravity is larger than the pressure of hydraulic oil in the other two hydraulic cylinders 4 (the hydraulic cylinders 4 at one end of the walking wheel assemblies 3 in the suspended state) Force, and then the hydraulic oil in the hydraulic cylinder 4 at one end bearing the gravity flows into the hydraulic cylinder 4 at the other end suspended in the air through the first pipeline 51, and further the piston rod of the hydraulic cylinder 4 at one end bearing the gravity retracts, and simultaneously the piston rod of the hydraulic cylinder 4 at the other end suspended in the air extends out, and further the walking wheel assembly 3 at the other end suspended in the air is abutted to the ground, and further all the walking wheel assemblies 3 provide supporting force for the bed frame 1, and further medical personnel only need to provide force for keeping the bed frame 1 horizontal to realize the stable movement of the stretcher vehicle, when the two walking wheel assemblies 3 of the ambulance move to the position near the vehicle door, the medical personnel in the ambulance get down from the vehicle door, and then the front and the back medical personnel slightly lift the stretcher vehicle, and further move the stretcher vehicle out of the ambulance, and then the two medical personnel slowly reduce the height of the single stretcher vehicle, and further make the hydraulic oil in the hydraulic cylinder 4 flow, finally, the hydraulic oil quantity in each hydraulic cylinder 4 is kept equal, the extension length of the piston rod of each hydraulic cylinder 4 is consistent, the bed frame 1 is in a horizontal state, the bed body 2 is in a horizontal state, the medical staff can realize the stable movement of the stretcher vehicle only by providing the force for keeping the bed frame 1 horizontal (the stretcher vehicle needs to be lifted by force at the last moment when the stretcher vehicle is moved out of the ambulance and the last moment when the stretcher vehicle is moved out of the ambulance, but the force action time is short and can be ignored), the stretcher vehicle is convenient to be moved off from the ambulance, the patient is convenient to be transferred, meanwhile, the medical staff does not need to bear the gravity of the stretcher vehicle and the patient, the medical staff is concentrated on keeping the bed frame 1 horizontal, the stretcher vehicle is always in the horizontal state, the patient is always in a lying state, and the patient is prevented from moving relatively under the ambulance, further, the patient is prevented from generating secondary injury when moving relatively, so that the probability of generating secondary injury to the patient is reduced, the secondary injury is further prevented from aggravating the state of the patient, the state of the patient is further kept stable, the patient is further treated, and the patient is further recovered; when the stretcher is in a stable state on the ground, the first switch 11 is closed, the first electromagnetic valve 52 is further closed, hydraulic oil is prevented from flowing in the first pipeline 51 continuously, the pressure of the hydraulic oil in all the hydraulic cylinders 4 is kept unchanged, the stretcher is further in a horizontal state, and further the transfer of a patient is facilitated, when a slope is encountered in a hospital, front and back medical staff enable the stretcher to be in a horizontal state, then the first switch 11 is pressed, so that the hydraulic oil moves in the first pipeline 51, the extension lengths of piston rods of all the hydraulic cylinders 4 are further adjusted, all the walking wheel assemblies 3 are further abutted to the ground simultaneously, all the walking wheel assemblies 3 jointly provide supporting force for the stretcher, further, the medical staff can realize the stable movement of the stretcher only by providing force for keeping the bed frame 1 horizontal, and further facilitate the movement of the stretcher on the slope, and then make things convenient for patient's transfer, make patient be in the state of lying down all the time on the slope simultaneously, and then prevent that patient from producing relative movement when shifting on the slope, and then prevent that patient from producing the secondary injury when relative movement, and then reduce patient and produce the probability of secondary injury, and then prevent the state of an illness of secondary injury aggravation patient, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery.

As shown in fig. 7 and 8, a second pipeline 53 and a third pipeline 54 are symmetrically arranged on two sides of the first electromagnetic valve 52; a second electromagnetic valve 55 and a first pump body 56 are arranged between the second pipeline 53 and the third pipeline 54; the second electromagnetic valve 55 is fixedly connected with the bedstead 1; the first pump body 56 is fixedly connected with the bedstead 1; one end of the second pipeline 53 is communicated with the first pipeline 51; the other end of the second pipeline 53 is communicated with one end of the second electromagnetic valve 55; the other end of the second electromagnetic valve 55 is communicated with one end of the first pump body 56; the other end of the first pump body 56 is communicated with one end of the third pipeline 54; the other end of the third pipeline 54 is communicated with the first pipeline 51; a controller 12, a horizontal sensor 13 and a storage battery 14 are arranged below the bedstead 1; the controller 12, the level sensor 13 and the storage battery 14 are respectively fixedly connected with the bed frame 1; the level sensor 13 is in communication with the controller 12; the controller 12 is communicated with the first pump body 56; the first pump body 56 is communicated with the storage battery 14.

By arranging the controller 12 (the controller 12 is provided with a control switch, the first switch 11 is automatically closed when the control switch is opened), the control switch is opened, the controller 12 works, when the bedstead 1 is in an inclined state, the level sensor 13 transmits a signal to the controller 12, the controller 12 judges the inclined state of the bedstead 1 according to the received signal, the controller 12 controls the second electromagnetic valve 55 to be opened, the controller 12 controls the first pump body 56 to work simultaneously, the hydraulic oil is driven to move in the first pipeline 51, the hydraulic oil quantity in the hydraulic cylinders 4 at two ends is changed, the extension lengths of the piston rods of the hydraulic cylinders 4 at two ends are changed, the bedstead 1 is enabled to be always kept in a horizontal state, the bed body 2 is enabled to be automatically kept in a horizontal state on a slope, and the stable movement of a patient on the slope can be realized only by pushing the stretcher vehicle to move at the moment, and then avoid medical personnel to lift the stretcher hard and make the stretcher keep the level, and then make things convenient for patient's removal, and then improve the convenience that the stretcher used, controller 12 adjusts the bed body 2 often according to the tilt state of bed body 2 simultaneously, and then make bed body 2 can both be in the horizontality all the time on the slope of different slopes, and then make patient be in the state of lying down all the time when shifting on the slope, and then prevent that patient from producing relative movement when shifting on the slope, and then prevent that patient from producing the secondary injury when relative movement, and then reduce patient's aggravation that produces the secondary injury, and then prevent the state of an illness of secondary injury patient, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery.

As shown in fig. 3 and 8, a second switch 15 is arranged on the bed frame 1; the second switch 15 is fixedly connected with the bedstead 1; the second switch 15 is in communication with the controller 12.

By arranging the second switch 15, when a stretcher vehicle is used for transferring a patient to an ambulance from the ground, the patient is transferred to the door of the ambulance through the stretcher vehicle, then medical staff opens a control switch of the controller 12, the first switch 11 automatically enters an off state, then the medical staff holds the stretcher vehicle with force, so that the stretcher vehicle is in a horizontal state, then the medical staff opens the second switch 15, the second switch 15 transmits an electric signal to the controller 12, the controller 12 controls the second electromagnetic valve 55 to work, meanwhile, the controller 12 controls the first pump body 56 to work, the first pump body 56 drives hydraulic oil in a hydraulic pump to flow, so that the hydraulic oil in the hydraulic cylinder 4 close to one end of the door of the ambulance flows into the hydraulic cylinder 4 at the other end, and a piston rod of the hydraulic cylinder 4 close to one end of the door of the ambulance retracts, simultaneously, a piston rod of the hydraulic cylinder 4 at the other end extends out, so that the bedstead 1 is slowly lifted under the auxiliary action of medical staff, the walking wheel component 3 close to one end of the car door is slowly lifted, when the walking wheel component 3 close to one end of the car door is higher than the bottom surface of the compartment of the ambulance, the second switch 15 is switched off, then the medical staff forcibly pushes the stretcher vehicle while keeping the stretcher vehicle horizontal, so that the stretcher vehicle moves into the ambulance, after the walking wheel component 3 on the ground moves to be close to the car door of the ambulance, the stretcher vehicle stops being pushed, then the second switch 15 is switched on, further, the second switch 15 transmits an electric signal to the controller 12, further, the controller 12 controls the second electromagnetic valve 55 to work, simultaneously, the controller 12 controls the first pump body 56 to work, further, the first pump body 56 drives hydraulic oil in the hydraulic pump to flow, further, hydraulic oil in the hydraulic cylinder 4 close to the outside the door of the ambulance flows into the hydraulic cylinder 4 in the ambulance, then the piston rod of the hydraulic cylinder 4 close to the outside of the ambulance door retracts, and simultaneously the piston rod of the hydraulic cylinder 4 in the ambulance car extends, so that the bedstead 1 is slowly lifted under the assistance of the medical staff, and simultaneously the walking wheel component 3 close to the outside of the ambulance door is slowly lifted, when the walking wheel component 3 outside the ambulance door is higher than the bottom surface of the ambulance car carriage, the second switch 15 is switched off, then the medical staff forcibly pushes the stretcher car while keeping the stretcher car horizontal, so that the stretcher car is completely moved to the ambulance to move, and further the ambulance transfers the patient to the hospital, thereby realizing the transfer of the patient, when the stretcher car is transferred to the ambulance, the bedstead 1 is always in a horizontal state, so that the patient is always in a flat state, and further the relative movement between the patient and the bedstead 1 when the patient is transferred to the ambulance is prevented, thereby the secondary injury of the patient when the relative movement is prevented, and then reduce patient's probability of producing the secondary injury, and then prevent the state of an illness of secondary injury aggravation patient, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery, and the stretcher when shifting toward the ambulance, medical personnel only need provide make bedstead 1 keep the level and promote the power that bedstead 1 removed just can realize the transfer of stretcher, and then alleviate medical personnel's load, and then make things convenient for patient's transfer (the working process of stretcher when the bench is unanimous with the process of last ambulance, not specifically describe).

As shown in fig. 7 and 8, a pressure sensor 511 is arranged on the first pipeline 51; the pressure sensor 511 is communicated with the first pipeline 51; the pressure sensor 511 is in communication with the controller 12; the controller 12 converts the pressure value transmitted from the pressure sensor 511 into a weight value of the patient.

In-process through stretcher transfer patient, open switch 11, and then make the hydraulic oil of both ends pneumatic cylinder 4 be in the connected state, and then pressure sensor 511 transmits the pressure signal of hydraulic oil (this pressure is that patient's gravity and stretcher gravity produce jointly) for controller 12, and then controller 12 turns into patient's weight with the pressure value of hydraulic oil through the formula of setting for, and then obtain patient's weight, and then add dose and nutrient composition according to patient's weight, and then be favorable to patient's recovery, avoid carrying out special weighing to patient simultaneously, and then avoid weighing the in-process and cause No. two injuries to patient, and then prevent that secondary injury aggravates patient's the state of an illness, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery.

As shown in fig. 1, 4, 5, 6 and 7, the road wheel assembly 3 includes a roller 31 and a hinge seat 32; the roller 31 is rotatably connected with the hinge seat 32; a connecting seat 33 is arranged above the hinged seat 32; two guide posts 34 are symmetrically arranged at the upper end of the connecting seat 33; the guide column 34 is fixedly connected with the connecting seat 33; the guide column 34 is connected with the lower end of the hydraulic cylinder 4 in a sliding way; the end part of a piston rod of the hydraulic cylinder 4 is fixedly connected with the connecting seat 33; the two rollers 31 at one end of the bedstead 1 are steering wheels 311; the two rollers 31 at the other end of the bedstead 1 are driving wheels 312; the hinge seat 32 connected with the steering wheel 311 is rotatably connected with the corresponding connecting seat 33; the hinge seat 32 connected with the driving wheel 312 is fixedly connected with the corresponding connecting seat 33; the driving wheel 312 is provided with a mounting groove; a hub motor 313 is arranged in the mounting groove; the rotating part of the hub motor 313 is fixedly connected with the driving wheel 312; the fixed part of the hub motor 313 is fixedly connected with the hinge seat 32; the in-wheel motor 313 is connected to the battery 14.

Through setting up directive wheel 311, and then make things convenient for the stretcher to turn to, through setting up in-wheel motor 313, in-wheel motor 313 drives drive wheel 312 when rotating and rotates, and then makes drive wheel 312 roll subaerial, and then drives drive wheel 312 and remove subaerial, and then drives the stretcher and remove subaerial, and then avoids the manpower to promote the stretcher and remove, and then conveniently shifts patient, alleviates medical personnel's load simultaneously, and then improves the convenience that the stretcher used.

As shown in fig. 1 to 4, a connecting assembly 6 is disposed at the connection position of the bed frame 1 and the bed body 2; the connecting components 6 are uniformly arranged at intervals; the connecting assembly 6 comprises a connecting plate 61 and an elastic piece 62; the connecting plate 61 is fixedly connected with the bed body 2; the elastic element 62 is arranged between the connecting plate 61 and the bedstead 1; the elastic pieces 62 are arranged at equal intervals; the upper end of the elastic piece 62 is fixedly connected with the connecting plate 61; the lower end of the elastic member 62 is fixedly connected to the frame 1.

By arranging the elastic part 62, the elastic part 62 provides supporting force for the connecting plate 61 and further provides supporting force for the bed body 2 and the patient, when the stretcher is transversely collided, the transverse collision force is transmitted to the elastic part 62 through the bedstead 1, so that the elastic part 62 is deformed, then the transverse collision force is transmitted to the bed body 2 through the elastic part 62 and finally transmitted to the patient, and when the elastic part 62 is deformed, collision energy is absorbed, so that the collision energy transmitted to the bed body 2 is reduced, so that the collision energy transmitted to the patient is reduced, further the injury of the transverse collision to the patient is reduced, and further the probability of secondary injury of the patient is reduced; when the stretcher walks on rugged ground, the rollers 31 vibrate up and down, vibration energy is further transmitted to the elastic piece 62, the elastic piece 62 vibrates up and down, then the elastic piece 62 transmits the vibration energy to a patient, the vibration energy is absorbed in the process of vibration up and down of the elastic piece 62, the vibration energy transmitted to the patient is further reduced, further, the damage to the patient caused by vibration is reduced, further, the probability of secondary damage to the patient is reduced, further, the state of an illness of the patient is kept stable, further, the stretcher is favorable for treating the patient, and further, the rehabilitation of the patient is facilitated.

As shown in fig. 1, 3, 4, 5, 6, 7 and 8, the method of using the stretcher includes the steps of:

s1: enabling the patient to lie on the stretcher, then turning on a switch of the hub motor 313 to enable the hub motor 313 to rotate, enabling the hub motor 313 to drive the roller 31 to rotate, enabling the roller 31 to drive the stretcher to move, and enabling the stretcher to transfer the patient to a destination under the assistance of medical staff; when using the stretcher to shift the patient, make the patient lie flat on bed body 2, open the switch of in-wheel motor 313, and then make in-wheel motor 313 rotate, and then in-wheel motor 313 drives the stretcher subaerial removal, and then shift to the destination (operating room, inspection room, ward etc.) with patient under medical personnel's auxiliary action, shift patient's in-process medical personnel only need provide the power that changes stretcher moving direction and just can realize patient's transfer, and then conveniently shift patient, alleviate medical personnel's load simultaneously, and then improve the convenience that the stretcher used.

S2: when the stretcher vehicle encounters a slope in the process of transferring a patient in S1, a medical worker at the lower end lifts the lower end of the bedstead 1 to keep the two ends of the bedstead 1 horizontal, then the medical worker opens the first switch 11, the first switch 11 transmits an electric signal to the first electromagnetic valve 52, the electric signal opens the first electromagnetic valve 52, hydraulic oil flows in the first pipeline 51 after the first electromagnetic valve 52 is opened, the roller 31 at the higher end abuts against the slope, the piston rod of the hydraulic cylinder 4 at the higher end is compressed under the combined action of the gravity of the stretcher vehicle and the patient, the hydraulic oil in the hydraulic cylinder 4 at the higher end flows into the hydraulic cylinder 4 at the lower end, the piston rod of the hydraulic cylinder 4 at the higher end retracts, and the piston rod of the hydraulic cylinder 4 at the lower end extends out, the rollers 31 at the lower end are abutted against the slope, the rollers 31 at the two ends are abutted against the slope at the moment, the bedstead 1 and the patient are supported under the combined action of the rollers 31 at the two ends, and the medical staff can realize the stable movement of the patient on the slope only by keeping the two ends of the bedstead 1 horizontal at the moment; when a slope is needed when a patient is transferred, the medical staff at the lower end lifts the lower end of the bedstead 1, so that the two ends of the bedstead 1 are kept horizontal, then the medical staff opens the first switch 11, then the first switch 11 transmits an electric signal to the first electromagnetic valve 52, then the electric signal enables the first electromagnetic valve 52 to be opened, after the first electromagnetic valve 52 is opened, hydraulic oil flows in the first pipeline 51, and because the roller 31 at the higher end is abutted against the slope, the piston rod of the hydraulic cylinder 4 at the higher end is compressed under the combined action of the stretcher and the gravity of the patient, so that the hydraulic oil in the hydraulic cylinder 4 at the higher end flows into the hydraulic cylinder 4 at the lower end, and further the piston rod of the hydraulic cylinder 4 at the higher end is retracted, and simultaneously the piston rod of the hydraulic cylinder 4 at the lower end is extended, so that the roller 31 at the lower end is abutted against the slope, and then make all gyro wheels 31 all contradict on the slope, and then every gyro wheel 31 provides the holding power to the stretcher, and then support bedstead 1 and patient under the combined action of all gyro wheels 31, and then drive patient and move on the slope under the combined action of in-wheel motor 313, and then realize the transfer of patient on the slope, and the in-process medical personnel that shifts just need to make the both ends of bedstead 1 keep the level and just can realize the steady removal of patient on the slope, and then prevent that patient from producing relative movement when shifting on the slope, and then prevent that patient from producing the secondary injury when relative movement, and then reduce patient and produce the probability of secondary injury, and then prevent the state of an illness of secondary injury patient, and then make patient's state of an illness keep stable, and then be favorable to treating patient, and then be favorable to patient's recovery.

S3: in the process of transferring the patient by the stretcher vehicle in S1, when the patient needs to be transferred from the ambulance to the ground, the medical staff firstly pushes the stretcher vehicle to the door of the ambulance, then one medical staff lifts one end of the stretcher vehicle outside the ambulance, the other medical staff pushes the stretcher vehicle in the ambulance with force, so that the stretcher vehicle moves out of the ambulance, the two rollers 31 at one end of the stretcher vehicle move out of the ambulance (at this time, the two rollers 31 are in a suspended state), then the medical staff in the ambulance presses the first switch 11, the first switch 11 transmits an electric signal to the first electromagnetic valve 52, the electric signal opens the first electromagnetic valve 52, at the moment when the first electromagnetic valve 52 is opened, the piston rod of the hydraulic cylinder 4 in the ambulance is compressed under the combined action of the gravity of the stretcher vehicle and the patient, the hydraulic oil in the hydraulic cylinder 4 in the ambulance flows into the hydraulic cylinder 4 outside the ambulance, the piston rod of the hydraulic cylinder 4 in the ambulance retracts, the piston rod of the hydraulic cylinder 4 outside the ambulance extends, two rollers 31 outside the ambulance are butted on the ground, all the rollers 31 can provide supporting force for the bedstead 1 at the moment, the bedstead 1 and a patient are supported under the combined action of all the rollers 31, then the first switch 11 is closed, after the first switch 11 is closed, a medical worker pushes the stretcher vehicle outwards, when the two rollers 31 in the ambulance move to the vicinity of the door of the ambulance, the stretcher vehicle stops being pushed, then the medical worker in the ambulance gets down from the door, then the front medical worker and the back medical worker lift the stretcher vehicle slightly to move the stretcher vehicle out of the ambulance, when the roller 31 near one end of the ambulance door is in a suspended state, then the first switch 11 is turned on to slowly lower the height of the bedstead 1, so that the hydraulic oil in the hydraulic cylinder 4 far away from one end of the ambulance door flows into the hydraulic cylinder 4 near one end of the ambulance door, the piston rod in the hydraulic cylinder 4 far away from one end of the ambulance door is retracted, and the piston rod of the hydraulic cylinder 4 near one end of the ambulance door is extended, so that the roller 31 near one end of the ambulance door is abutted against the ground, and all the rollers 31 are abutted against the ground, and all the rollers 31 can provide supporting force for the bedstead 1, and the bedstead 1 and a patient are supported under the combined action of all the rollers 31; when a patient needs to be transferred to the ground from an ambulance in the process of transferring the patient by using the stretcher vehicle, firstly, the door of the ambulance is opened, then, medical staff firstly pushes the stretcher vehicle to the door of the ambulance, then, one medical staff lifts one end of the stretcher vehicle outside the ambulance, the other medical staff forcibly pushes the stretcher vehicle in the ambulance to move the stretcher vehicle out of the ambulance, so that the two rollers 31 at one end of the stretcher vehicle move out of the ambulance (at the moment, the two rollers 31 are in a suspended state), then, the medical staff in the ambulance presses the first switch 11, the first switch 11 transmits an electric signal to the first electromagnetic valve 52, the first electromagnetic valve 52 is opened by the electric signal, the piston rod of the hydraulic cylinder 4 in the ambulance is compressed under the combined action of the stretcher vehicle and the gravity of the patient at the moment when the first electromagnetic valve 52 is opened, so that hydraulic oil in the hydraulic cylinder 4 in the ambulance flows to the hydraulic cylinder 4 outside the ambulance, then the piston rod of the hydraulic cylinder 4 in the ambulance retracts, simultaneously the piston rod of the hydraulic cylinder 4 outside the ambulance extends, further two rollers 31 outside the ambulance butt against the ground, all the rollers 31 can provide supporting force for the bedstead 1, the bedstead 1 and the patient are supported under the combined action of all the rollers 31, then the switch 11 is closed, after the switch 11 is closed, the medical staff pushes the stretcher vehicle outwards, further the stretcher vehicle moves out of the ambulance, after the two rollers 31 in the ambulance move to the vicinity of the door of the ambulance, the pushing of the stretcher vehicle is stopped, then the medical staff in the ambulance gets down from the door, then the front medical staff and the back medical staff slightly lift up the stretcher vehicle, further the stretcher vehicle moves out of the ambulance, at the moment, the roller 31 near one end of the door of the ambulance is in a suspended state, then the switch 11 is opened, the height of the bedstead 1 is slowly reduced, so that the hydraulic oil in the hydraulic cylinder 4 far away from one end of the door of the ambulance flows into the hydraulic cylinder 4 near one end of the door, so that the piston rod in the hydraulic cylinder 4 far away from one end of the door of the ambulance retracts, the piston rod of the hydraulic cylinder 4 near one end of the door extends, so that the roller 31 near one end of the door is abutted against the ground, the roller 31 is abutted against the ground, all the roller 31 can provide supporting force for the bedstead 1, the bedstead 1 and a patient are supported under the combined action of all the roller 31, when the stretcher is transferred from the ambulance to the ground, the medical staff only needs to provide force for keeping the bedstead 1 horizontal (the stretcher needs to be lifted by force at the last moment of just moving out the ambulance and moving out the ambulance, but the acting time of the force is short and can be ignored), so that the steady movement of the stretcher can be realized, the stretcher vehicle is convenient to transfer from the ambulance, so that the patient is convenient to transfer, meanwhile, the medical staff does not need to bear the gravity of the stretcher vehicle and the patient, and the medical staff is concentrated on keeping the bed frame 1 horizontal, so that the stretcher vehicle is always in a horizontal state, the patient is always in a lying state, the patient is prevented from moving relatively under the ambulance, the patient is prevented from generating secondary injury when moving relatively, the probability of the patient generating secondary injury is reduced, the condition of the patient is prevented from being aggravated by the secondary injury, the condition of the patient is kept stable, the patient is favorably treated, and the rehabilitation of the patient is facilitated (the working process of the stretcher vehicle under the step is consistent with the process of the ambulance); when a patient needs to keep a certain inclination due to a special injury (or after an operation), medical staff enable the bedstead 1 to keep a certain inclination according to the specific situation of the patient, the piston rod of the hydraulic cylinder 4 is automatically adjusted at the moment, and then the bedstead 1 and the patient are supported under the action of the roller 31, the medical staff only need to provide the force for keeping the bedstead 1 to be fixedly inclined so as to realize the transfer of the patient, and further the transfer of the patient is facilitated, and the inclined angle is adjusted by the medical staff in real time, so that the patient always keeps the inclination of a certain angle on different road surfaces, and further the application range of the stretcher is improved.

S4: in S1, when the stretcher is moved to a slope, the control switch of the controller 12 is turned on to operate the controller 12, the level sensor 13 transmits a signal to the controller 12, the controller 12 determines the inclination of the bed frame 1 according to the received signal, then the controller 12 controls the second solenoid valve 55 to open, the controller 12 controls the first pump body 56 to operate, the first pump body 56 causes the hydraulic oil in the hydraulic cylinder 4 at the higher end to flow into the hydraulic cylinder 4 at the lower end through the first pipe 51 to retract the piston rod in the hydraulic cylinder 4 at the higher end and extend the piston rod of the hydraulic cylinder 4 at the lower end to make the bed frame 1 in a horizontal state under the combined action of the hydraulic cylinders 4 at both ends, the patient can move stably on the slope; when the stretcher vehicle moves to the slope, the control switch of the controller 12 is turned on, the controller 12 is further operated, then the level sensor 13 transmits a signal to the controller 12, the controller 12 judges the inclination condition of the bed frame 1 according to the received signal, the controller 12 controls the second electromagnetic valve 55 to be turned on, the controller 12 controls the first pump body 56 to operate, the hydraulic oil is further driven to move in the first pipeline 51, the hydraulic oil in the hydraulic cylinder 4 at the higher end flows into the hydraulic cylinder 4 at the lower end through the first pipeline 51, the piston rod in the hydraulic cylinder 4 at the higher end is further retracted, the piston rod in the hydraulic cylinder 4 at the lower end is simultaneously extended, the bed frame 1 is further in a horizontal state under the combined action of the hydraulic cylinders 4 at the two ends, and the bed body 2 is further automatically kept in a horizontal state on the slope, and then the patient is driven to move on the slope under the combined action of the hub motor 313, so that the patient can be transferred on the slope, the medical care personnel can realize the transfer of the patient only by providing the force for changing the moving direction of the stretcher, thereby facilitating the transfer of the patient, reducing the load of the medical staff, further improving the convenience of the stretcher, and in the transferring process, the medical care personnel can realize the stable movement of the patient on the slope only by keeping the two ends of the bedstead 1 horizontal, thereby preventing the relative movement of the patient when the patient is transferred on the slope and further preventing the secondary injury of the patient when the patient moves relatively, thereby reducing the probability of secondary injury of the patient and further preventing the secondary injury from aggravating the illness state of the patient, thereby keeping the state of illness of the patient stable, being beneficial to treating the patient and being beneficial to the rehabilitation of the patient.

S5: in the process of transferring a patient by the stretcher vehicle in S1, when the patient needs to be transferred to an ambulance, the patient is transferred to a door of the ambulance by the stretcher vehicle, the switch of the hub motor 313 is turned off, then a medical worker turns on the control switch of the controller 12, at this time, the first switch 11 automatically enters an off state, then the medical worker holds the stretcher vehicle with force to make the stretcher vehicle in a horizontal state, then the medical worker turns on the second switch 15, the second switch 15 transmits an electric signal to the controller 12, the controller 12 controls the second electromagnetic valve 55 to operate, the controller 12 controls the first pump body 56 to operate, the first pump body 56 drives hydraulic oil of the hydraulic cylinder 4 to flow, so that hydraulic oil in the hydraulic cylinder 4 near one end of the door of the ambulance flows into the hydraulic cylinder 4 at the other end, retracting the piston rod of the hydraulic cylinder 4 near one end of the ambulance door, extending the piston rod of the hydraulic cylinder 4 at the other end, slowly raising the bedstead 1 under the assistance of the medical staff, slowly raising the roller 31 near one end of the ambulance door, turning off the switch 15 when the roller 31 near one end of the ambulance door is higher than the bottom surface of the ambulance, then the medical staff pushes the stretcher vehicle while keeping the stretcher vehicle horizontal, moving the stretcher vehicle into the ambulance, stopping pushing the stretcher vehicle after the roller 31 on the ground moves to the vicinity of the ambulance door, then turning on the switch 15, the switch 15 transmits an electric signal to the controller 12, the controller 12 controls the solenoid valve 55 to work, and the controller 12 controls the pump 56 to work, the first pump body 56 drives hydraulic oil in the hydraulic pump to flow, so that the hydraulic oil in the hydraulic cylinder 4 close to the outside of the ambulance door flows into the hydraulic cylinder 4 in the ambulance, a piston rod of the hydraulic cylinder 4 close to the outside of the ambulance door retracts, a piston rod of the hydraulic cylinder 4 in the ambulance door extends out, the bedstead 1 is slowly lifted under the auxiliary action of medical personnel, the roller 31 close to the outside of the ambulance door slowly lifts, the second switch 15 is switched off when the roller 31 outside the ambulance door is higher than the bottom surface of the ambulance carriage, then the medical personnel pushes the stretcher vehicle while keeping the stretcher vehicle horizontal, so that the stretcher vehicle moves into the ambulance, the stretcher vehicle stops pushing the stretcher vehicle after completely moving into the ambulance, and the ambulance transfers a patient to a hospital; when a patient needs to be transferred to an ambulance from the ground in the process of transferring the patient by using the stretcher vehicle, the patient is transferred to the door of the ambulance by the stretcher vehicle, then the switch of the hub motor 313 is closed, then the medical staff opens the control switch of the controller 12, the first switch 11 automatically enters the off state, the medical staff holds the stretcher vehicle with strength to enable the stretcher vehicle to be in the horizontal state, then the medical staff opens the second switch 15, further the second switch 15 transmits an electric signal to the controller 12, further the controller 12 controls the second electromagnetic valve 55 to work, simultaneously the controller 12 controls the first pump body 56 to work, further the first pump body 56 drives the hydraulic oil in the hydraulic pump to flow, further the hydraulic oil in the hydraulic cylinder 4 close to one end of the ambulance door flows into the hydraulic cylinder 4 at the other end, further the piston rod of the hydraulic cylinder 4 close to one end of the ambulance door retracts, simultaneously, a piston rod of the hydraulic cylinder 4 at the other end extends out, so that the bedstead 1 is slowly lifted under the auxiliary action of medical staff, the roller 31 close to one end of the vehicle door is slowly lifted, the second switch 15 is switched off when the roller 31 close to one end of the vehicle door is higher than the bottom surface of the compartment of the ambulance, then the medical staff pushes the stretcher vehicle while keeping the stretcher vehicle horizontal, so that the stretcher vehicle moves into the ambulance, after the roller 31 on the ground moves to the position close to the door of the ambulance, the pushing of the stretcher vehicle is stopped, the second switch 15 is switched on, so that the second switch 15 transmits an electric signal to the controller 12, so that the controller 12 controls the second electromagnetic valve 55 to work, simultaneously the controller 12 controls the first pump body 56 to work, so that the first pump body 56 drives hydraulic oil in the hydraulic pump to flow, so that the hydraulic oil in the hydraulic cylinder 4 close to the outside the ambulance door flows into the hydraulic cylinder 4 in the ambulance, then the piston rod of the hydraulic cylinder 4 close to the outside of the ambulance door retracts, and simultaneously the piston rod of the hydraulic cylinder 4 in the ambulance car extends, so that the bedstead 1 is slowly lifted under the assistance of the medical staff, and simultaneously the roller 31 close to the outside of the ambulance door is slowly lifted, when the roller 31 outside the ambulance door is higher than the bottom surface of the ambulance car, the second switch 15 is switched off, then the medical staff pushes the stretcher car while keeping the stretcher car horizontal, so that the stretcher car moves into the ambulance, the stretcher car stops pushing the stretcher car after completely moving into the ambulance, the ambulance transfers the patient to the hospital, when the stretcher car transfers to the ambulance, the bedstead 1 is always in the horizontal state, and then the patient is always in the flat state, thereby the relative movement between the patient and the bedstead 1 when transferring to the ambulance is prevented, and further the secondary injury of the patient when the relative movement is prevented, and then reduce patient's probability of producing the secondary injury, and then prevent the state of an illness of secondary injury aggravation patient, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery, and the stretcher is when shifting toward the ambulance, medical personnel only need provide make bedstead 1 keep the level and promote the power that bedstead 1 removed just can realize the transfer of stretcher, and then alleviate medical personnel's load, and then make things convenient for patient's transfer (the working process of stretcher when the bench is unanimous with the process of last ambulance, not specifically describe).

When in use, a patient lies on the bed body 2, medical staff pushes the stretcher vehicle to move behind the walking direction of the stretcher vehicle, and then pushes the patient to move, so that the patient is transferred from the ambulance to an emergency room for emergency treatment, or the patient is transferred to an operating room, an emergency room, an examination room or a ward, etc., and the patient lies on the stretcher during the transfer, thereby facilitating the transfer of the patient, simultaneously keeping the patient in a relatively static state with the stretcher in the transfer process, thereby preventing the patient from moving relative to the bed body 2 in the transferring process and further preventing the patient from generating secondary injury in the relative movement process, thereby reducing the probability of secondary injury of the patient and further preventing the secondary injury from aggravating the illness state of the patient, thereby keeping the state of illness of the patient stable, being beneficial to treating the patient and further being beneficial to the rehabilitation of the patient; at present, when a patient is transferred downwards from an ambulance, a medical worker is required to lift a stretcher vehicle off the ambulance, the medical worker is required to use great strength to transfer the patient when lifting the stretcher vehicle, the patient is inconvenient to transfer, in the transferring process, the stretcher vehicle and the patient are difficult to be in a horizontal state, the patient can move relatively, secondary injury is easily caused to the patient, the illness state of the patient is aggravated, the patient can meet a slope road surface when transferring in a hospital or other places, the patient can not be kept in a flat lying state all the time when the medical vehicle walks on the slope, the patient can move relatively, the secondary injury is easily caused to the patient, the illness state of the patient is aggravated, the rehabilitation of the patient is not facilitated, the hydraulic cylinder 4 is arranged between a walking wheel component 3 and a bed frame 1, and the distance between the walking wheel component 3 and the bed frame 1 can be adjusted through the hydraulic cylinder 4, when a patient needs to be transferred from the ambulance, a medical worker pushes the stretcher vehicle to the door of the ambulance, then one medical worker lifts one end of the stretcher vehicle outside the ambulance, the other medical worker pushes the stretcher vehicle in the ambulance with force, so that the two walking wheel assemblies 3 at one end of the stretcher vehicle move out of the ambulance (at the moment, the two walking wheel assemblies 3 are in a suspended state), then the medical worker in the ambulance presses the first switch 11, the first switch 11 opens the first electromagnetic valves 52 on the two first pipelines 51, and at the moment when the first electromagnetic valve 52 is opened, because the two walking wheel assemblies 3 in the ambulance bear the gravity of the patient and the stretcher vehicle, and the two walking wheel assemblies 3 outside the ambulance are in a suspended state, the pressure of hydraulic oil in the two hydraulic cylinders 4 at one end bearing the gravity is larger than the pressure of hydraulic oil in the other two hydraulic cylinders 4 (the hydraulic cylinders 4 at one end of the walking wheel assemblies 3 in the suspended state) Force, and then the hydraulic oil in the hydraulic cylinder 4 at one end bearing the gravity flows into the hydraulic cylinder 4 at the other end suspended in the air through the first pipeline 51, and further the piston rod of the hydraulic cylinder 4 at one end bearing the gravity retracts, and simultaneously the piston rod of the hydraulic cylinder 4 at the other end suspended in the air extends out, and further the walking wheel assembly 3 at the other end suspended in the air is abutted to the ground, and further all the walking wheel assemblies 3 provide supporting force for the bed frame 1, and further medical personnel only need to provide force for keeping the bed frame 1 horizontal to realize the stable movement of the stretcher vehicle, when the two walking wheel assemblies 3 of the ambulance move to the position near the vehicle door, the medical personnel in the ambulance get down from the vehicle door, and then the front and the back medical personnel slightly lift the stretcher vehicle, and further move the stretcher vehicle out of the ambulance, and then the two medical personnel slowly reduce the height of the single stretcher vehicle, and further make the hydraulic oil in the hydraulic cylinder 4 flow, finally, the hydraulic oil quantity in each hydraulic cylinder 4 is kept equal, the extension length of the piston rod of each hydraulic cylinder 4 is consistent, the bed frame 1 is in a horizontal state, the bed body 2 is in a horizontal state, the medical staff can realize the stable movement of the stretcher vehicle only by providing the force for keeping the bed frame 1 horizontal (the stretcher vehicle needs to be lifted by force at the last moment when the stretcher vehicle is moved out of the ambulance and the last moment when the stretcher vehicle is moved out of the ambulance, but the force action time is short and can be ignored), the stretcher vehicle is convenient to be moved off from the ambulance, the patient is convenient to be transferred, meanwhile, the medical staff does not need to bear the gravity of the stretcher vehicle and the patient, the medical staff is concentrated on keeping the bed frame 1 horizontal, the stretcher vehicle is always in the horizontal state, the patient is always in a lying state, and the patient is prevented from moving relatively under the ambulance, further, the patient is prevented from generating secondary injury when moving relatively, so that the probability of generating secondary injury to the patient is reduced, the secondary injury is further prevented from aggravating the state of the patient, the state of the patient is further kept stable, the patient is further treated, and the patient is further recovered; when the stretcher is in a stable state on the ground, the first switch 11 is closed, the first electromagnetic valve 52 is further closed, hydraulic oil is prevented from flowing in the first pipeline 51 continuously, the pressure of the hydraulic oil in all the hydraulic cylinders 4 is kept unchanged, the stretcher is further in a horizontal state, and further the transfer of a patient is facilitated, when a slope is encountered in a hospital, front and back medical staff enable the stretcher to be in a horizontal state, then the first switch 11 is pressed, so that the hydraulic oil moves in the first pipeline 51, the extension lengths of piston rods of all the hydraulic cylinders 4 are further adjusted, all the walking wheel assemblies 3 are further abutted to the ground simultaneously, all the walking wheel assemblies 3 jointly provide supporting force for the stretcher, further, the medical staff can realize the stable movement of the stretcher only by providing force for keeping the bed frame 1 horizontal, and further facilitate the movement of the stretcher on the slope, and then make things convenient for patient's transfer, make patient be in the state of lying down all the time on the slope simultaneously, and then prevent that patient from producing relative movement when shifting on the slope, and then prevent that patient from producing the secondary injury when relative movement, and then reduce patient and produce the probability of secondary injury, and then prevent the state of an illness of secondary injury aggravation patient, and then make patient's the state of an illness remain stable, and then be favorable to treating patient, and then be favorable to patient's recovery.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.