阅读说明：本技术 一种用于车辆移动的快速移位装置及其方法 (Rapid shifting device and method for vehicle movement ) 是由 陈雅 蒋晨超 刘涛 于 2020-06-02 设计创作，主要内容包括：本发明公开了一种用于车辆移动的快速移位装置及其方法,属于汽车移动设备领域。本装置在机械结构上主要由连接架和移位器两个部分组成,连接架安装于四个移位器上,连接架作为施力部件,用于带动四个移位器分别对车辆的四个车轮进行同步抬升。在本装置中,通过设计连接架解决了单车轮移动可能对汽车造成的损害及其他大型整车移动装置不便携带等问题,保证了本快速移位装置的安全可靠性和人机和谐性。(The invention discloses a quick shifting device and method for vehicle movement, and belongs to the field of automobile mobile equipment. The device mainly comprises a connecting frame and two shifters on a mechanical structure, wherein the connecting frame is arranged on the four shifters and serves as a force application part for driving the four shifters to respectively synchronously lift four wheels of a vehicle. In the device, the problems that the single wheel moves to possibly cause damage to the automobile and other large-scale whole automobile moving devices are inconvenient to carry and the like are solved by designing the connecting frame, and the safety reliability and the man-machine harmony of the quick shifting device are ensured.)

1. A quick-shift apparatus for vehicle movement, characterized by: comprises a connecting frame (1) and a shifter (2); the connecting frame (1) is arranged on the four shifters (2), and the connecting frame (1) is used as a force application component and is used for driving the four shifters (2) to respectively and synchronously lift four wheels of a vehicle;

the connecting frame (1) comprises a connecting rod (101), a first transmission rod (102), a pedal rod (103) and a second transmission rod (104); the first transmission rod (102), the pedal rod (103) and the second transmission rod (104) are all telescopic rods, the first transmission rod (102) and the second transmission rod (104) are respectively and vertically fixed at two ends of the pedal rod (103), and the first transmission rod (102) and the second transmission rod (104) are parallel to each other; the first transmission rod (102) and the second transmission rod (104) are respectively hinged with two parallel connecting rods (101), and the non-hinged ends of the four connecting rods (101) are respectively connected with driving parts of the four shifters (2); the first transmission rod (102) and the two connecting rods (101) connected with the first transmission rod, the second transmission rod (104) and the two connecting rods (101) connected with the second transmission rod all form a parallelogram mechanism, the first transmission rod (102) and the second transmission rod (104) are driven by the pedal rod (103) to lift up and down and are always parallel to the ground in the lifting process, the postures of the four connecting rods (101) change synchronously in the lifting process, and the same driving force is applied to the four shifters (2).

2. The quick shifting device for vehicle movement according to claim 1, wherein the hinge end of each connecting rod (101) is provided with a latch hole (3), and the first driving lever (102) and the second driving lever (104) are provided with a coupling portion having a pin hole; the hinged end of the connecting rod (101) is fixed with the connecting part through the bolt (4), the hinged position keeps clearance fit, and when the first transmission rod (102) and the second transmission rod (104) move up and down, the four connecting rods (101) can rotate around the bolt (4).

3. The quick-shifting apparatus for vehicle movement according to claim 1, characterized in that: the shifter (2) comprises a sliding rod (201), a support rod (202), a bearing rod (203), a universal wheel (204), a sleeve (205), a hydraulic cylinder (206), a pedal (207), a piston rod (208), an injection rod (209), a wheel carrier (210) and a pressure release valve (211); the sliding rod (201) is sleeved in the supporting rod (202) to form a sliding pair for telescopic adjustment, and the sliding rod (201) only has one linear degree of freedom for moving along the axial direction relative to the supporting rod (202); limiting pieces are arranged on the sliding rod (201) and the supporting rod (202), and the limiting pieces are used for temporarily limiting the sliding rod (201) to move relative to the supporting rod (202); two bearing rods (203) are respectively and vertically fixed at one ends of the sliding rod (201) and the supporting rod (202) to form a concave space for accommodating wheels; a sleeve (205) is coaxially sleeved outside each bearing rod (203), and the sleeve (205) can freely rotate around an axis; each end of each bearing rod (203) is fixed with a universal wheel (204) through a wheel carrier (210), and the whole shifter (2) is supported on the ground through four universal wheels (204); the hydraulic cylinder (206) is fixed on a side plate of the support rod (202), a piston rod (208) in the hydraulic cylinder (206) is fixed with the sliding rod (201), and the sliding rod (201) slides relative to the support rod (202) under the drive of the piston rod (208); the pedal (207) is used as a driving part of the shifter (2), one end of the pedal is hinged to the hydraulic cylinder (206), and the other end of the pedal is fixedly connected with the non-hinged end of the connecting rod (101); the two oil cavities in the hydraulic cylinder (206) are driven by oil through an injector with an injection rod (209), the middle part of a pedal (207) is connected with the injection rod (209) through a hinge, the pedal (207) is driven by a connecting rod (101) to rotate around a hinge point at the end part and drive the injection rod (209) to move, so that the oil in the hydraulic cylinder (206) flows to a second oil cavity from a first oil cavity, a piston rod (208) is driven to retract into the hydraulic cylinder (206), and the distance between two bearing rods (203) is shortened;

a return spring and a pressure relief valve (211) are arranged in the hydraulic cylinder (206), the pressure relief valve (211) is connected with two oil cavities of the hydraulic cylinder (206), the pressure relief valve (211) is communicated with the two oil cavities of the hydraulic cylinder (206) when opened, and the return spring in the hydraulic cylinder (206) pushes a piston rod (208) to move towards the direction extending out of the hydraulic cylinder (206) along the axis.

4. The quick-shifting apparatus for vehicle movement according to claim 3, characterized in that: the locating part includes spacing hole (5) and spacing bolt (6), respectively has one spacing hole (5) on slide bar (201) and bracing piece (202), and when slide bar (201) furthest slided in bracing piece (202), two spacing hole (5) axis coincided, during spacing bolt (6) pluggable inserts spacing hole (5) to restriction slide bar (201) moved for bracing piece (202).

5. The quick-shifting apparatus for vehicle movement according to claim 1, characterized in that: two connecting holes (7) have been seted up to the non-hinged end of connecting rod (101), and two connecting holes (7) that correspond have also been seted up to the hookup location of footboard (207), and connecting rod (101) are fixed through inserting connecting pin (8) after the connecting hole coincidence on footboard (207), and footboard (207) do not have the degree of freedom for connecting rod (101).

6. The quick-shifting apparatus for vehicle movement according to claim 1, characterized in that: the distance between the first transmission rod (102) and the second transmission rod (104) is larger than the width of the vehicle body.

7. The quick-shifting apparatus for vehicle movement according to claim 1, characterized in that: the first transmission rod (102) and the second transmission rod (104) are detachably fixed at two ends of the pedal rod (103).

8. The quick-shifting apparatus for vehicle movement according to claim 7, characterized in that: the first transmission rod (102) and the second transmission rod (104) are screwed at two ends of the pedal rod (103) through threads.

9. The quick-shifting apparatus for vehicle movement according to claim 3, characterized in that: the reset spring is located in a first oil cavity of the hydraulic cylinder (206), after the pressure release valve (211) is in an open state and the reset spring pushes the piston rod (208) to move to a balance position, the distance between the two bearing rods (203) fixed on the sliding rod (201) and the supporting rod (202) is required to ensure that when the shifter (2) is placed on the ground, tires of a vehicle can enter a concave space between the two bearing rods (203).

10. A vehicle displacement method using the quick displacement apparatus of claim 3, characterized by the steps of:

s1: placing a shifter (2) on the ground, releasing the limiting function of a limiting piece on a support rod (202), opening a pressure release valve (211) on a hydraulic cylinder (206), enabling a return spring to push a piston rod (208) and drive a sliding rod (201) to move along the axis in the direction of extending out of the hydraulic cylinder, and when the piston rod (208) moves to a balance position and the distance between two bearing rods (203) reaches the maximum, stopping the movement of the piston rod (208), and screwing down the pressure release valve (211);

s2: pushing the shifter (2) in the step S1 to the side of any wheel of the vehicle to be moved, pushing the shifter along the axis direction of the wheel, enabling the wheel to enter a concave space between two bearing rods (203), and keeping a sleeve (205) on the bearing rod (203) fixed on a support rod (202) to be tightly attached to the circumferential surface of the wheel;

s3: the other three shifters (2) are operated according to the steps from S1 to S2, so that the shifters are respectively positioned at four wheels of the vehicle;

s4: fixing four connecting rods (101) on the connecting frame (1) with pedals (207) on four shifters (2) respectively;

s5: the length of the first transmission rod (102) and the second transmission rod (104) is adjusted according to the distance between two wheels on one side surface of the vehicle, the length of the pedal rod (103) is adjusted according to the width of the vehicle body, and the pedal rod (103) is fixedly connected with the first transmission rod (102) and the second transmission rod (103) on two sides through threads;

s6: the first transmission rod (102) and the second transmission rod (104) are hinged with the four connecting rods (101) respectively, the first transmission rod (102) and the second transmission rod (104) are kept in a horizontal state, and the pedal rod (103) is located outside the vehicle body;

s7: treading force is applied to the pedal rod (103) to enable the pedal rod to reciprocate up and down, the postures of the four connecting rods (101) are changed synchronously in the moving process, the four connecting rods (101) drive the pedal (207) to move at the same speed, the movement of the pedal (207) drives the injection rod (209) on the injector to move, oil in the hydraulic cylinder (206) flows to a second oil cavity from a first oil cavity, the piston rod (208) is driven to retract into the hydraulic cylinder (206), the distance between the two bearing rods (203) is shortened, the bearing rods (203) welded and fixed with the sliding rod (201) are gradually close to wheels to apply extrusion force to the two sides of the wheels, and the four wheels are lifted synchronously through the rolling of the sleeve (205) and the extrusion effect of the bearing rods (203) on the two sides;

s8: keeping the four wheels of the vehicle in a state of being lifted by the four shifters (2), after the vehicle is pushed to a target area, opening a pressure release valve (211) on the hydraulic cylinder (206), communicating two oil cavities of the hydraulic cylinder (206), pushing a piston rod (208) to reset by a reset spring in the hydraulic cylinder (206) to increase the distance between two bearing rods (203) until the four wheels are completely supported on the ground, and screwing the pressure release valve (211) after the vehicle stops in the area, wherein no vertical acting force exists between a sleeve (205) and the wheels;

s9: the length of the pedal rod (103) is adjusted to enable the four shifters (2) to slide to the outside of the vehicle body along the axis direction of the wheel, the pedal force is applied to the pedal rod (103) again to enable the distance between two bearing rods (203) in the shifters (2) to be contracted to the shortest state, and the limiting piece is used for locking the relative movement between the support rod (202) and the sliding rod (201);

s10: the four connecting rods (101) and the four shifters (2) are disassembled and then are stored for standby.

Technical Field

The invention relates to the field of automobile mobile equipment, in particular to a quick shifting device and a quick shifting method for vehicle movement.

Background

The automobiles become essential transportation means in life and work, the number of automobiles in China is rapidly increasing by about thirty million every year, and the technology brings convenience to people and inconvenience to car owners, property, firemen and traffic polices: parking space is narrow and results in parking inconvenience, and the parking stall is taken up, and important passageway or fire control passageway are taken up, hinder the traffic, and the vehicle is illegal to stop etc..

In order to solve the problems, various auxiliary moving vehicle appliances are produced, but most of the auxiliary moving vehicle appliances aim at the movement of a single tire and can move the vehicle after being lifted in sequence, and the gravity center of the vehicle is repeatedly changed by lifting the vehicle with a single wheel, so that the vehicle is easy to turn over.

Therefore, a shifting device is needed to be designed, so that the wheels can be synchronously lifted, and the damage to the vehicle is small; can the modularized assembly, easy dismouting, easily carry, it is small.

Disclosure of Invention

The present invention is directed to overcoming the problems occurring in the prior art and providing a quick shifting apparatus and a method for operating the same.

The specific technical scheme is as follows:

a quick shifting device for vehicle movement comprises a connecting frame and a shifter; the connecting frame is arranged on the four shifters and used as a force application part for driving the four shifters to respectively and synchronously lift four wheels of the vehicle;

the connecting frame comprises a connecting rod, a first transmission rod, a pedal rod and a second transmission rod; the first transmission rod, the pedal rod and the second transmission rod are all telescopic rods, the first transmission rod and the second transmission rod are respectively and vertically fixed at two ends of the pedal rod, and the first transmission rod and the second transmission rod are parallel to each other; the first transmission rod and the second transmission rod are respectively hinged with two parallel connecting rods, and the non-hinged ends of the four connecting rods are respectively connected with the driving parts of the four shifters; the first transmission rod and the two connecting rods connected with the first transmission rod form a parallelogram mechanism, the first transmission rod and the second transmission rod are driven by the pedal rod to lift up and down and are always parallel to the ground in the lifting process, the postures of the four connecting rods are synchronously changed in the lifting process, and the same driving force is applied to the four shifters.

Preferably, the hinge end of each connecting rod is provided with a bolt hole, and the first transmission rod and the second transmission rod are provided with connecting parts with pin holes; the hinged end of connecting rod with fix through the bolt between the connecting portion, and articulated position keeps clearance fit, when making first transfer line and second transfer line reciprocate, four connecting rods all can rotate around the bolt.

Preferably, the shifter comprises a sliding rod, a support rod, a bearing rod, a universal wheel, a sleeve, a hydraulic cylinder, a pedal, a piston rod, an injection rod, a wheel carrier and a pressure release valve; the sliding rod is sleeved in the supporting rod to form a sliding pair for telescopic adjustment, and the sliding rod has only one linear degree of freedom for movement along the axial direction relative to the supporting rod; the limiting pieces are arranged on the sliding rod and the supporting rod and used for temporarily limiting the sliding rod to move relative to the supporting rod; the two bearing rods are respectively and vertically fixed at one ends of the sliding rod and the supporting rod to form a concave space for accommodating wheels; a sleeve is coaxially sleeved outside each bearing rod and can freely rotate around the axis; each end of each bearing rod is fixed with a universal wheel through a wheel carrier, and the whole shifter is supported on the ground through four universal wheels; the hydraulic cylinder is fixed on a side plate of the support rod, a piston rod in the hydraulic cylinder is fixed with the sliding rod, and the sliding rod slides relative to the support rod under the driving of the piston rod; the pedal is used as a driving part of the shifter, one end of the pedal is hinged on the hydraulic cylinder, and the other end of the pedal is fixedly connected with the non-hinged end of the connecting rod; the two oil cavities in the hydraulic cylinder are driven by oil through an injector with an injection rod, the middle part of the pedal is connected with the injection rod through a hinge, the pedal is driven by the connecting rod to rotate around a hinge point at the end part and drive the injection rod to move, so that the oil in the hydraulic cylinder flows from the first oil cavity to the second oil cavity, the piston rod is driven to retract into the hydraulic cylinder, and the distance between the two bearing rods is shortened;

a reset spring and a pressure release valve are arranged in the hydraulic cylinder, the pressure release valve is connected with the two oil cavities of the hydraulic cylinder, the pressure release valve is communicated with the two oil cavities of the hydraulic cylinder when opened, and the reset spring in the hydraulic cylinder pushes a piston rod to move along the axis towards the direction extending out of the hydraulic cylinder.

Preferably, the limiting part comprises a limiting hole and a limiting bolt, the sliding rod and the supporting rod are respectively provided with a limiting hole, when the sliding rod slides into the supporting rod to the maximum extent, the axes of the two limiting holes are overlapped, and the limiting bolt can be inserted into the limiting hole in a pluggable manner so as to limit the movement of the sliding rod relative to the supporting rod.

Preferably, the non-hinged end of the connecting rod is provided with two connecting holes, the connecting position of the pedal is also provided with two corresponding connecting holes, the connecting rod and the connecting holes on the pedal are overlapped and then fixed through inserting a connecting pin, and the pedal has no degree of freedom relative to the connecting rod.

Preferably, the distance between the first transmission rod and the second transmission rod is larger than the width of the vehicle body.

Preferably, the first transmission rod and the second transmission rod are detachably fixed at two ends of the pedal rod.

Preferably, the first transmission rod and the second transmission rod are screwed at two ends of the pedal rod through threads.

Preferably, the return spring is located in the first oil chamber of the hydraulic cylinder, and after the relief valve is in an open state and the return spring pushes the piston rod to move to the balance position, the distance between the two bearing rods fixed on the sliding rod and the supporting rod should ensure that the tire of the vehicle can enter the concave space between the two bearing rods when the shifter is placed on the ground.

Another object of the present invention is to provide a vehicle shifting method using the above fast shifting apparatus, comprising the steps of:

s1: placing a shifter on the ground, removing the limiting effect of a limiting piece on a supporting rod, opening a pressure release valve on a hydraulic cylinder, enabling a reset spring to push a piston rod and drive a sliding rod to move along the axis in the direction extending out of the hydraulic cylinder, stopping the movement of the piston rod when the piston rod moves to a balance position and the distance between two bearing rods reaches the maximum, and screwing down the pressure release valve;

s2: pushing the shifter in the S1 to the side of any wheel of the vehicle to be moved, pushing the shifter along the axis direction of the wheel, enabling the wheel to enter a concave space between two bearing rods, and keeping a sleeve on the bearing rod fixed on the supporting rod to be tightly attached to the circumferential surface of the wheel;

s3: the other three shifters are operated according to the steps from S1 to S2, so that the shifters are respectively positioned at four wheels of the vehicle;

s4: fixing the four connecting rods on the connecting frame with the pedals on the four shifters respectively;

s5: the length of the first transmission rod and the second transmission rod is adjusted according to the distance between two wheels on one side surface of the vehicle, the length of the pedal rod is adjusted according to the width of the vehicle body, and the pedal rod is fixedly connected with the first transmission rod and the second transmission rod on two sides through threads;

s6: the first transmission rod and the second transmission rod are respectively hinged with the four connecting rods, the first transmission rod and the second transmission rod are kept in a horizontal state, and the pedal rod is positioned outside the vehicle body;

s7: the treading force is applied to the pedal rods to enable the pedal rods to reciprocate up and down, the postures of the four connecting rods are changed synchronously in the moving process, the four connecting rods drive the pedal to keep the same speed to move, the movement of the pedal drives the injection rod on the injector to move, so that oil in the hydraulic cylinder flows from the first oil cavity to the second oil cavity, the piston rod is driven to retract into the hydraulic cylinder, the distance between the two bearing rods is shortened, the bearing rods fixedly welded with the sliding rod are gradually close to the wheels to apply extrusion force to the two sides of the wheels, and the four wheels are lifted synchronously through the rolling of the sleeves and the extrusion effect of the bearing rods on the two sides;

s8: keeping the state that four wheels of the vehicle are lifted by four shifters, after the vehicle is pushed to a target area, opening a pressure release valve on a hydraulic cylinder to communicate two oil cavities of the hydraulic cylinder, pushing a piston rod to reset by a reset spring in the hydraulic cylinder to enable the distance between two bearing rods to be increased until the four wheels are completely supported on the ground, enabling no vertical acting force to exist between a sleeve and the wheels, and screwing down the pressure release valve after the vehicle stops in the area;

s9: the length of the pedal rod is adjusted to enable the four shifters to slide outside the vehicle body along the axis direction of the wheel, the pedal force is applied to the pedal rod again to enable the distance between two bearing rods in the shifters to be contracted to the shortest state, and the limiting piece is used for locking the relative movement between the supporting rod and the sliding rod;

s10: four connecting rods and four shifters are disassembled and then are stored for standby.

The invention has the beneficial effects that:

(1) the synchronous lifting of multiple wheels of the vehicle is realized, the damage to the vehicle is small, and the side turning is not easy to occur;

(2) the device consists of modular components, and each component occupies small space, is easy to disassemble, assemble and carry;

(3) the device is suitable for the removal of the not unidimensional vehicle, has the universality.

Drawings

FIG. 1 is a top view of a quick-shift apparatus in an operating state;

FIG. 2 is a front view of the quick-change device in an operating state;

FIG. 3 is a front view of the quick-shift device attachment frame;

FIG. 4 is a top view of the quick-change device attachment bracket;

FIG. 5 is a top view of the quick-shift device shifter;

FIG. 6 is a front view of the quick-shift device shifter;

fig. 7 is a schematic view of the engagement relationship between the shifter and the wheel of the quick-shift device.

In the figure, a connecting frame 1, a connecting rod 101, a first transmission rod 102, a pedal rod 103, a second transmission rod 104, a shifter 2, a sliding rod 201, a support rod 202, a bearing rod 203, a universal wheel 204, a sleeve 205, a hydraulic cylinder 206, a pedal 207, a piston rod 208, an injection rod 209, a wheel frame 210, a pressure release valve 211, a bolt hole 3, a bolt 4, a limiting hole 5, a limiting bolt 6, a connecting hole 7, a connecting pin 8 and a wheel 9 are arranged.

Detailed Description

The present invention is described in further detail below with reference to the attached drawing figures.

Fig. 1 and 2 are detailed structures of the quick shifting device at different angles in a working state, which mainly comprise two main components, namely a connecting frame 1 and a shifter 2, and can be used for assisting a vehicle owner, a property, a traffic police, a fire fighter and the like to synchronously lift multiple wheels of the vehicle and move the vehicle to a proper area under the intervention of manpower. The basic functions of the components are as follows:

the connecting frame 1 is of a parallelogram structure, and the rods which are parallel to each other have equal speed in the moving process. The connecting frame 1 and the shifter 2 are detachably fixed when in use, and one connecting frame 1 is simultaneously arranged on four shifters 2. The connecting frame 1 is used as a force application component, a user applies force to the tail end of the connecting frame 1 by feet, and the connecting frame 1 can drive the moving components of the four shifters 2 to move at the same speed, so that the four wheels of the vehicle are lifted synchronously. In order to adapt the connecting frame 1 to different types of vehicles, part of the rods are telescopic rods and can be adjusted according to the size of the vehicle when in use.

The mechanical structure of these parts will be described in detail below.

Fig. 3 and 4 show details of the quick-displacement device attachment frame 1 in different angles. The connecting frame 1 comprises a connecting rod 101, a first transmission rod 102, a pedal rod 103 and a second transmission rod 104; the first transmission rod 102, the pedal rod 103 and the second transmission rod 104 are all telescopic rods, and the lengths of the telescopic rods can be adjusted as required. The first driving lever 102 and the second driving lever 104 are detachably fixed to both ends of the foot lever 103, respectively, the first driving lever 102 and the second driving lever 104 are perpendicular to the foot lever 103, and the first driving lever 102 and the second driving lever 104 are parallel to each other. In this embodiment, the both ends of foot bar 103 all have the kink of an outer tapping, and the tapping is in the tip of first transfer line 102 and second transfer line 104, and it is fixed to cooperate through the screw thread between the three to in convenient to dismantle and accomodate. The first transmission rod 102 and the second transmission rod 104 are respectively hinged with two connecting rods 101, wherein the connecting rods 101 hinged on each transmission rod are parallel to each other. Each connecting rod 101 is of identical dimensions and has a pin hole 3 at its hinged end. The first transmission rod 102 and the second transmission rod 104 are both hinged conveniently and are provided with a connecting part forming a certain included angle with the rod body, and pin holes are formed in the connecting part. The hinged ends and the connecting parts of the connecting rods 101 are fixed through the bolts 4, and the hinged positions are in clearance fit, so that when the first transmission rod 102 and the second transmission rod 104 move up and down, the four connecting rods 101 can rotate around the bolts 4.

And the non-hinged ends of the four connecting rods 101 are connected to the drive members of the four displacers 2, respectively. In this embodiment, the driving part of the shifter 2 is the pedal 207, so the non-hinged end of the connecting rod 101 is provided with two connecting holes 7, the connecting position of the pedal 207 is also provided with two corresponding connecting holes 7, and the connecting rod 101 is fixed by inserting the connecting pin 8 after being overlapped with the connecting holes 7 on the pedal 207. Thus, the pedal 207 has no degree of freedom with respect to the link 101, and both are rigidly connected.

The first transmission rod 102 and the two connecting rods 101 connected thereto, and the second transmission rod 104 and the two connecting rods 101 connected thereto all form a parallelogram mechanism. The working mode of the device is as follows: keeping the first transmission rod 102 and the second transmission rod 104 in a horizontal state, and applying a treading force to the foot lever 103, so that the first transmission rod 102 and the second transmission rod 104 are driven by the foot lever 103 to lift up and down. And is always parallel to the ground during the lifting and lowering processes of the first transmission rod 102 and the second transmission rod 104. During the lifting process, the postures of the four connecting rods 101 change synchronously, and the rotating rates of the four connecting rods around the hinge points are the same, so that the same driving stroke is applied to the pedals 207 on the four shifters 2, namely, the same driving force is applied to the four shifters 2, so as to ensure the synchronous lifting of the four wheels.

Fig. 5 and 6 show the detail of the shifter 2 in the quick-shift device at different angles. The displacer 2 of the present embodiment includes a slide rod 201, a support rod 202, a bearing rod 203, a universal wheel 204, a sleeve 205, a hydraulic cylinder 206, a pedal 207, a piston rod 208, an injection rod 209, a wheel carrier 210, and a relief valve 211. The support rod 202 is a rod body with a hollow inner cavity, the sliding rod 201 is sleeved in the support rod 202 to form a telescopic sliding pair, and the sliding rod 201 only has one linear degree of freedom moving along the axial direction relative to the support rod 202. Since the shifter 2 is required to bear the dead weight of the vehicle during the process of lifting the wheel, the sliding rod 201 and the supporting rod 202 are provided with limit pieces for temporarily limiting the movement of the sliding rod 201 relative to the supporting rod 202. In this embodiment, the limiting member includes a limiting hole 5 and a limiting bolt 6, the sliding rod 201 and the supporting rod 202 each have a limiting hole 5, when the sliding rod 201 slides into the supporting rod 202 to the maximum extent, the axes of the two limiting holes 5 coincide, and the limiting bolt 6 is inserted into the limiting hole 5 to limit the movement of the sliding rod 201 relative to the supporting rod 202. When the limit is required to be cancelled, the limit bolt 6 can be pulled out of the limit hole 5, and the relative movement between the sliding rod 201 and the support rod 202 is recovered.

The lifting of the wheels by the displacer 2 is performed by the pressing action of the two bearing bars 203. Two bearing rods 203 are vertically fixed at one ends of the sliding rod 201 and the supporting rod 202, respectively, to form a concave space for accommodating a wheel. Each bearing rod 203 is coaxially sleeved with a sleeve 205, and the sleeve 205 can freely rotate around the axis. Each end of each bearing rod 203 is fixed with a universal wheel 204 through a wheel carrier 210, and the whole shifter 2 is supported on the ground through four universal wheels 204. The shifter 2 is placed on the ground for use, and the bearing rod 203 is positioned at a height slightly higher than the bottom surface but much lower than the wheel axle of the wheel. When the vehicle is stopped on the ground, only the bottom of the outer circumferential surface of the wheel is in contact with the ground. Referring to fig. 7, the shifter 2 may be moved to allow the wheel to enter the concave space between the two support rods 202 in the direction of the arrow in the figure, and then the distance between the two support rods 203 is gradually decreased to apply a pressing force to the lower portion of the outer circumferential surface of the wheel, so that the wheel is gradually separated from the ground and supported on the two support rods 203. Because the wheel is the rubber material, so bearing bar 203 outside can freely pivoted sleeve 205 can be through rotatory, avoid bearing bar 203 to the wheel extrusion in-process too big frictional force that appears.

In this embodiment, the power for the displacer 2 is provided by a hydraulic cylinder 206. The hydraulic cylinder 206 is fixed to the side plate of the support bar 202. A piston rod 208 is arranged in the hydraulic cylinder 206, and a piston at the end of the piston rod 208 divides an inner cavity of the hydraulic cylinder into a first oil cavity and a second oil cavity, wherein hydraulic oil is filled in the two oil cavities. The output end of the piston rod 208 is fixed with the sliding rod 201, so that the sliding rod 201 slides relative to the supporting rod 202 under the driving of the piston rod 208. The first oil chamber and the second oil chamber of the hydraulic oil in the hydraulic cylinder 206 driven by the injector are connected through an oil path, the injector is arranged on the oil path, and two one-way valves are arranged on the oil path. The inner cavity of the injector is communicated with an oil way between the two one-way valves, and the communication directions of the two one-way valves are all used for enabling hydraulic oil in the oil way to flow from the first oil cavity to the second oil cavity in a one-way mode. The injector is provided with an injection rod 209, the injection rod 209 and the inner cavity of the injector form a plunger type suction pump, and hydraulic oil can be sucked out of the first oil cavity and blown into the second oil cavity through reciprocating suction of the injection rod 209. The injection rod 209 is driven by the pedal 207, so that the pedal 207 is the driving part of the entire displacer 2, one end of which is hinged to the hydraulic cylinder 206 and the other end of which is fixedly connected to the non-hinged end of the connecting rod 101. The middle of the pedal 207 is connected with the injection rod 209 through a hinge, the pedal 207 rotates around a hinge point at the end under the driving of the connecting rod 101, and drives the injection rod 209 to reciprocate up and down, so that oil of the hydraulic cylinder 206 continuously flows from the first oil chamber to the second oil chamber, and further drives the piston rod 208 to retract into the hydraulic cylinder 206, the distance between the two bearing rods 203 is shortened, and extrusion force is applied to wheels.

In order to enable the hydraulic cylinder 206 to be reset, a return spring and a relief valve 211 are provided in the hydraulic cylinder 206. The relief valve 211 is connected to two oil chambers of the hydraulic cylinder 206, and the relief valve 211 communicates the two oil chambers of the hydraulic cylinder 206 when opened. At this time, the return spring in the hydraulic cylinder 206 may push the piston rod 208 to move along the axis in a direction to extend out of the hydraulic cylinder 206. In the present embodiment, the return spring is located in the first oil chamber of the hydraulic cylinder 206, and when the piston rod 208 retracts into the hydraulic cylinder 206, the piston rod 208 continuously compresses the return spring, and the return spring accumulates a return elastic force. When the relief valve 211 is in an open state, the return spring pushes the piston rod 208 to move in a direction to extend out of the hydraulic cylinder 206 until the piston rod moves to an equilibrium position. In order to facilitate the wheel-locking, the distance between the sliding rod 201 and the two load-bearing rods 203 fixed to the support rod 202 when the vehicle is in the above-mentioned equilibrium position should be such that the tires of the vehicle can enter the concave space between the two load-bearing rods 203 when the shifter 2 is placed on the ground.

In addition, in the assembled state of the connecting bracket 1, the distance between the first transmission lever 102 and the second transmission lever 104 should be larger than the width of the vehicle body. Therefore, the maximum length of the foot rest lever 103 should be greater than the vehicle body width of the vehicle. Meanwhile, the installation distance between the connecting rods 101 on the first transmission rod 102 and the second transmission rod 104 should be adjusted to a proper position to ensure that the four shifters 2 can adapt to the wheel distance between the front and rear wheels. The telescopic adjustment positions of the first transmission rod 102 and the second transmission rod 104 are located between the hinge positions of the two connecting rods 101.

Based on the rapid shifting device, the invention also provides a vehicle shifting method using the device, which comprises the following steps:

s1: placing a shifter 2 on the ground, pulling out the limit bolt 6, and removing the limit function between the support rod 202 and the sliding rod 201; opening a pressure relief valve 211 on the hydraulic cylinder 206, enabling a return spring to push the piston rod 208 and drive the sliding rod 201 to move along the axis in the direction of extending out of the hydraulic cylinder, when the piston rod 208 moves to the balance position and the distance between the two bearing rods 203 reaches the maximum, stopping the movement of the piston rod 208, screwing the pressure relief valve 211, and enabling the two oil chambers not to be directly communicated.

S2: the shifter 2 in S1 is pushed to the side of any wheel of the vehicle to be moved, and pushed along the axial direction of the wheel 9, that is, along the direction of the arrow in fig. 7, so that the wheel 9 enters the concave space between the two bearing rods 203, and the sleeve 205 on the bearing rod 203 fixed on the support rod 202 is held tightly against the circumferential surface of the wheel.

S3: the remaining three shifters 2 are operated in steps of S1 to S2 to be located at four wheels of the vehicle, respectively.

S4: the rods of the connecting frame 1 are initially kept detached, so that the four connecting rods 101 of the connecting frame 1 are first fixed to the pedals 207 of the four shifters 2 by inserting the connecting pins 8.

S5: the length of the first transmission rod 102 and the second transmission rod 104 is adjusted according to the distance between two wheels on one side surface of the vehicle, the length of the pedal rod 103 is adjusted according to the width of the vehicle body, the length of the three rod pieces is required to ensure that the whole subsequent connecting frame 1 can be horizontally fixed on the four shifters 2, and the connecting rods 101 keep the same posture. Then the foot lever 103 is fixed to the first transmission lever 102 and the second transmission lever 104 on both sides by screw connection.

S6: the first transmission rod 102 and the second transmission rod 104 are hinged to the four connecting rods 101 respectively, the first transmission rod 102 and the second transmission rod 104 are kept in a horizontal state, the first transmission rod 102 and the second transmission rod 104 are located outside the vehicle body respectively, and the pedal rod 103 is located outside the vehicle body so as to be convenient for stepping.

S7: the user applies treading force to the treading rod 103 to enable the treading rod to reciprocate up and down, the postures of the four connecting rods 101 change synchronously in the moving process, the four connecting rods 101 drive the pedal 207 to move at the same speed, the movement of the pedal 207 drives the injection rod 209 on the injector to move, so that oil in the hydraulic cylinder 206 flows from the first oil cavity to the second oil cavity, the piston rod 208 is driven to retract into the hydraulic cylinder 206, and the distance between the two bearing rods 203 is shortened. One of the bearing rods 203 is attached to the wheel, so that the other bearing rod 203 welded and fixed with the sliding rod 201 is gradually close to the wheel and then attached to the other side of the wheel, when the wheel is pulled closer, the two bearing rods 203 begin to apply extrusion force to the two sides of the wheel, and through the rolling of the sleeve 205 and the extrusion effect of the two bearing rods 203, the four wheels are lifted synchronously until the four wheels are separated from the ground and are completely supported on the two bearing rods 203.

S8: the vehicle can be lowered by moving the vehicle to the target area while keeping the four wheels of the vehicle lifted by the four shifters 2. At this time, the relief valve 211 on the hydraulic cylinder 206 is opened to communicate the two oil chambers of the hydraulic cylinder 206, and the return spring in the hydraulic cylinder 206 pushes the piston rod 208 to return to increase the distance between the two bearing rods 203 until the four wheels are completely supported on the ground. At this point, the vehicle is supported by four wheels, and there is no vertical force between the sleeve 205 and the wheels, in the disengaged state. The vehicle can thus complete the displacement, parking in this area and finally tightening the relief valve 211.

S9: the length of the foot bar 103 is adjusted to enable the four shifters 2 to slide to the outside of the vehicle body along the wheel axis direction, the foot bar 103 is applied with a treading force again to enable the distance between the two bearing bars 203 in the shifters 2 to be contracted to the shortest state, and the relative movement between the support bar 202 and the sliding bar 201 is locked by the aid of the limiting piece.

S10: the four connecting rods 101 and the four shifters 2 are disassembled, the pedals 207 are drawn out from the connecting rods 101, and the first transmission rod 102, the pedal rod 103 and the second transmission rod 104 are contracted to the shortest length so as to be stored for standby.

Therefore, the shifting device can be driven under the intervention of human external force, and other large-scale power equipment is not needed. In the device, the problems that the automobile is possibly damaged by single-wheel movement and the other large-sized whole automobile is inconvenient to carry due to movement are solved by designing the connecting frame, and the safety, reliability and man-machine harmony of the quick shifting device are guaranteed.

The above-described embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the invention. Various changes and modifications may be made by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present invention. Therefore, the technical scheme obtained by adopting the mode of equivalent replacement or equivalent transformation is within the protection scope of the invention.