阅读说明：本技术 一种汽车用制动辅助系统 (Braking auxiliary system for automobile ) 是由 曹素峰 于 2020-12-29 设计创作，主要内容包括：本发明公开了一种汽车用制动辅助系统,该系统与汽车车身固定连接,包括方向传感器、加速度传感器、控制处理器、驱动装置、第二制动机械单元；其特征在于：方向传感器、加速度传感器分别与控制处理器连接,控制处理器与驱动电机相连,当方向传感器和加速度传感器传送到控制器的感应信号符合特定条件时候,控制处理器给向驱动装置发送控制信号,驱动装置驱动第二制动机械单元进行制动操作。本发明通过对制动系统进行改进,提高了汽车行驶的安全性。(The invention discloses an automobile brake auxiliary system, which is fixedly connected with an automobile body and comprises a direction sensor, an acceleration sensor, a control processor, a driving device and a second brake mechanical unit, wherein the direction sensor is connected with the acceleration sensor; the method is characterized in that: the direction sensor and the acceleration sensor are respectively connected with the control processor, the control processor is connected with the driving motor, when sensing signals transmitted to the controller by the direction sensor and the acceleration sensor meet specific conditions, the control processor sends control signals to the driving device, and the driving device drives the second braking mechanical unit to perform braking operation. The invention improves the braking system, thereby improving the driving safety of the automobile.)

1. A braking auxiliary system for an automobile is fixedly connected with an automobile body and comprises a direction sensor, an acceleration sensor, a control processor, a driving device and a second braking mechanical unit; the method is characterized in that: the direction sensor and the acceleration sensor are respectively connected with the control processor, the control processor is connected with the driving motor, when sensing signals transmitted to the controller by the direction sensor and the acceleration sensor meet specific conditions, the control processor sends control signals to the driving device, and the driving device drives the second braking mechanical unit to perform braking operation.

2. The brake assist system for an automobile according to claim 1, further comprising a speed sensor and a brake calculation device, wherein the speed sensor and the brake calculation device are connected to the control processor.

3. The brake assist system for automobile according to claim 2, wherein the brake calculating means collects and processes real-time data of the speed sensor and normal brake input data when the automobile in a driving state is normally braked.

4. The brake assist system for an automobile according to claim 3, wherein the brake calculation means performs normalization processing on a previous normal brake input data to generate a current normal brake input value; and the brake calculating device generates a brake speed value according to the speed value at the normal brake starting moment and the current instantaneous speed value recorded by the speed sensor.

5. The vehicle brake assist system according to claim 2, wherein the control processor sends a drive signal to the drive device to drive the second brake mechanism unit to operate if the received input data of the direction sensor, the acceleration sensor, the speed sensor, and the brake calculation device meet one of the following conditions;

firstly, a normal braking input value is greater than a normal braking input threshold value; brake speed value < brake speed threshold;

direction sensor instantaneous value > direction sensor threshold;

and the instantaneous value of the acceleration sensor is larger than the acceleration threshold value.

6. The second brake mechanism unit according to claim 1, comprising a mounting plate (1), a lifting unit and a ground friction unit, and further comprising a driving device (2) connected with the mounting plate, wherein the mounting plate (1) is fixedly mounted on the chassis of the automobile, the driving device (2) is mounted on one side of the mounting plate (1), the output end of the driving device (2) is connected with the lifting unit, the top of the lifting unit is mounted on the mounting plate (1), and the bottom of the lifting unit is mounted on the ground friction unit.

7. The auxiliary braking system for the automobile as claimed in claim 6, wherein the ground friction unit comprises a fixing plate (3) and a friction plate (4), the fixing plate (3) is connected with the bottom of the lifting unit, the friction plate (4) is fixedly connected to the lower surface of the fixing plate (3), and a plurality of friction grooves which are arranged in a staggered mode are formed in the friction plate (4).

8. The auxiliary braking system for the automobile as claimed in claim 7, wherein the fixing plate (3) and the friction plate (4) are both provided with through holes, and the fixing plate (3) is provided with a resistance adding piece (5).

9. The auxiliary braking system for automobiles according to claim 8, wherein the resistance adding member (5) comprises a fixed part (51), a movable part (52) and a buffering part (53), the fixed part (51) is fixedly connected to the side of the fixed plate (3) opposite to the friction plate (4), the buffering part (53) is installed on the inner side of the fixed part (51), the movable part (52) is slidably arranged on the inner side of the fixed part (51) and is fixedly connected with the buffering part (53), and the movable part (52) is movably arranged in the two through holes.

10. The auxiliary braking system for the automobile as claimed in claim 9, wherein the through hole of the friction plate (4) is a T-shaped hole with a large bottom and a small top, and the bottom of the movable portion (52) is of a T-shaped structure and is provided with a cushion layer made of the same material as the friction plate (4).

11. A brake assistance system for motor vehicles according to claim 8, wherein the opposite sides of the fixed plate (3) and the friction plate (4) are of a saw tooth configuration.

12. The auxiliary brake system for the automobile as claimed in claim 8, wherein the rear part of the fixed plate (3) is rotatably connected with a connecting piece (6), and one end of the connecting piece (6) far away from the fixed plate (3) is slidably connected with the automobile chassis.

13. The auxiliary braking system for the automobile as claimed in claim 6, wherein the lifting unit comprises a first guide rail (7), a second guide rail (8) and a folding frame (9), the first guide rail (7) is fixedly mounted on the mounting plate (1), the second guide rail (8) is fixedly mounted on the fixing plate (3), two connection points are arranged at the top and the bottom of the folding frame (9), one connection point at the top is rotatably connected to the first guide rail (7), the other connection point is movably connected in the track of the first guide rail (7) and connected with the output end of the driving device (2), and one connection point at the bottom is rotatably connected to the second guide rail (8) and the other connection point is movably connected in the track of the second guide rail (8).

14. Brake assist system for motor vehicles according to claim 13, characterized in that the folding leg (9) is formed by two levers that are cross-rotatably connected by a shaft.

15. The brake assist system for the vehicle as claimed in claim 7, wherein the driving means includes an electro-hydraulic push rod and an electric cylinder connected to a front end of the electro-hydraulic push rod; the driving device outputs linear motion from the output end of the electric cylinder.

Technical Field

The invention relates to the technical field of auxiliary braking, in particular to an auxiliary braking system for an automobile.

Background

At present, the braking of the automobile is mainly realized by wheel braking, namely, a corresponding braking force is generated by an automobile braking system to force wheels to decelerate or stop rotating, and the automobile is decelerated or stopped by virtue of friction force generated between tires and the ground. In the case of a sufficiently large braking force, i.e. when the wheel can reach a locking state or a slipping state under the action of the ABS, the braking distance of the vehicle depends on the magnitude of the friction between the tire and the ground. When the automobile is braked, the shearing force acting on the tire is continuously increased along with the increase of the friction force between the tire and the ground, and when the shearing force exceeds the shearing resistance between rubber layers, the rubber layers are peeled off, the friction force is not increased any more, and the maximum friction force is reached. Because the contact area between the round tire and the ground is very small, the shearing resistance provided by the rubber layer at the contact part is limited, the maximum friction force is limited, the braking distance of the automobile, particularly the emergency braking, is long, and accidents are easy to occur.

In the case of a collision of a passenger vehicle, the driver of the collided vehicle often has no response time for starting the braking device, and the high-speed movement of the collided vehicle can cause secondary damage, so that an automatic emergency braking device is needed.

In the case where the road surface friction is insufficient, there is a high possibility that the brake device fails, which may lead to occurrence of an accident.

Chinese patent CN107031634B discloses a driving assistance apparatus configured to control the longitudinal speed of the own vehicle. The apparatus includes a driving environment monitoring unit, a road friction estimation unit configured to provide an estimated road friction value, and a speed control unit configured to control a speed of the own vehicle based on the monitored driving environment and the estimated road friction value. The speed control unit is further configured to control the speed of the own vehicle based on a preset tire-road friction value if the tire-road friction estimation unit cannot provide a road friction estimation value. The driving assistance apparatus further comprises an intensive braking system arranged to provide emergency braking of the vehicle upon detection of a collision threat event. The invention also relates to a vehicle and a method for controlling the longitudinal speed of a vehicle. The invention provides emergency braking of the vehicle by estimating vehicle speed and friction.

Disclosure of Invention

The invention solves the defects in the prior art and provides a braking auxiliary system, and the invention adopts the following technical scheme:

a braking auxiliary system for an automobile is fixedly connected with an automobile body and comprises a direction sensor, an acceleration sensor, a control processor, a driving device and a second braking mechanical unit; the direction sensor and the acceleration sensor are respectively connected with the control processor, the control processor is connected with the driving motor, when sensing signals transmitted to the controller by the direction sensor and the acceleration sensor meet specific conditions, the control processor sends control signals to the driving device, and the driving device drives the second braking mechanical unit to perform braking operation.

Furthermore, the device also comprises a speed sensor and a brake calculating device, wherein the speed sensor and the brake calculating device are connected with the control processor.

Further, when the automobile in the driving state is normally braked, the brake calculating device collects and processes the real-time data of the speed sensor and the normal brake input data.

Further, the brake calculation device normalizes the normal brake input data before a certain time to generate a current normal brake input value; and the brake calculating device generates a brake speed value according to the speed value at the normal brake starting moment and the current instantaneous speed value recorded by the speed sensor.

Further, the control processor sends a driving signal to the driving device to drive the second braking mechanical unit to work under the condition that the received input data of the direction sensor, the acceleration sensor, the speed sensor and the braking calculation device meet one of the following conditions;

firstly, a normal braking input value is greater than a normal braking input threshold value; brake speed value < brake speed threshold;

direction sensor instantaneous value > direction sensor threshold;

and the instantaneous value of the acceleration sensor is larger than the acceleration threshold value.

Further, including mounting panel (1), lift unit and ground friction unit, still include drive arrangement (2) be connected with the installation version mounting panel (1) fixed mounting is on vehicle chassis, one side at mounting panel (1) is installed in drive arrangement (2), the output and the lift unit of drive arrangement (2) are connected, the top of lift unit is installed on mounting panel (1), the bottom is installed on ground friction unit.

Furthermore, the ground friction unit comprises a fixing plate (3) and friction plates (4), the fixing plate (3) is connected with the bottom of the lifting unit, the friction plates (4) are fixedly connected to the lower surface of the fixing plate (3), and a plurality of friction grooves which are arranged in a staggered mode are formed in the friction plates (4).

Furthermore, through holes are formed in the fixing plate (3) and the friction plate (4), and a resistance adding piece (5) is installed on the fixing plate (3).

Furthermore, it includes fixed part (51), movable part (52) and buffering portion (53) to add resistance piece (5), fixed part (51) fixed connection is in one side of fixed plate (3) back to friction disc (4), buffering portion (53) are installed to the inboard of fixed part (51), movable part (52) slide set up in the inboard of fixed part (51) and with buffering portion (53) fixed connection, movable part (52) activity sets up in two through-holes.

Furthermore, the through hole on the friction plate (4) is a T-shaped hole with a large lower part and a small upper part, and the bottom of the movable part (52) is of a T-shaped structure and is provided with a cushion layer made of the same material as the friction plate (4).

Furthermore, one side of the fixing plate (3) opposite to the friction plate (4) is of a sawtooth structure.

Furthermore, the tail part of the fixed plate (3) is rotatably connected with a connecting piece (6), and one end, far away from the fixed plate (3), of the connecting piece (6) is connected to the automobile chassis in a sliding mode.

Further, the lift unit includes guide rail (7), two (8) and folding leg (9), guide rail (7) fixed mounting is on mounting panel (1), two (8) fixed mounting of guide rail are on fixed plate (3), the top and the bottom of folding leg (9) all are equipped with two tie points, one at top the tie point rotates to be connected on guide rail (7), another swing joint just is connected with drive arrangement's (2) output in the track of guide rail (7), one at bottom the tie point rotates to be connected on guide rail (8), another swing joint is in the track of guide rail (8).

Furthermore, the folding frame (9) is formed by two stop rods which are crossed and rotatably connected through a rotating shaft.

Furthermore, the driving device comprises an electric hydraulic push rod and an electric cylinder connected to the front end of the electric hydraulic push rod; the driving device outputs linear motion from the output end of the electric cylinder.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention automatically or manually starts the second braking mechanical unit to brake by collecting the running data of the automobile such as acceleration, direction, speed, braking and the like, thereby reducing the damage of accidents caused by out-of-control braking in the running process of the automobile.

2. According to the collected normal operation data, generating a corresponding data form; the control system gives a normal braking input threshold value, a braking speed threshold value, a direction sensor threshold value and an acceleration threshold value at a specific moment according to the data form; since the thresholds are dynamically changed, the requirement for the judgment ability of the driver is reduced, and the occurrence of the misoperation in the case of automatic braking is prevented.

3. The invention drives the lifting unit to realize the lifting of the ground friction unit through the output end of the driving device, increases the friction effect of automobile braking through the falling of the ground friction unit and the contact with the ground, leads the automobile to be decelerated or stopped in a short distance, greatly improves the safety of the automobile, reduces the accident rate, has simple structure and is beneficial to wide popularization.

4. The bottom surface friction unit comprises a fixed plate and friction plates, friction effects with the ground are greatly improved through friction grooves arranged on the friction plates in a staggered mode, meanwhile, a sawtooth structure is arranged on one side, opposite to the fixed plate, of each friction plate, the using effects of the device can be greatly improved, and the friction plates are prevented from moving backwards or falling off due to overlarge acting force at the moment of contacting the bottom surfaces.

5. According to the resistance adding piece, the movable part of the resistance adding piece is arranged in the through hole, the bottom of the movable part is lower than the lower surface of the friction plate when the friction plate is not braked, and at the moment when the friction plate is contacted with the ground, the cushion layer on the end face of the movable part is firstly contacted with the ground, so that the buffering effect is achieved, the structural damage to the friction plate caused by instant impact is prevented, and the service life and the braking effect are improved.

6. The lifting unit adopts the structural design of the folding frame, the first guide rail and the second guide rail, can ensure the lifting effect of the fixed plate and the friction plate, and is assisted by the connecting piece arranged on the fixed plate.

7. The driving device comprises an electric hydraulic push rod and an electric cylinder connected to the front end of the electric hydraulic push rod, and the driving device operates the electric hydraulic push rod and/or the electric cylinder according to a control signal of a control processor to provide different braking modes so as to adapt to different conditions.

Drawings

FIG. 1 is a schematic diagram of the system of the present invention;

FIG. 2 is a schematic structural diagram of a second braking mechanism unit according to the present invention;

FIG. 3 is a cross-sectional view of the overall construction of the ground friction unit of the present invention;

fig. 4 is a bottom view of the ground friction unit of the present invention.

In the figure: 1. mounting a plate; 2. a drive device; 3. a fixing plate; 4. a friction plate; 5. adding a resistance piece; 51. a fixed part; 52. a movable portion; 53. a buffer section; 6. a connecting member; 7. a first guide rail; 8. a second guide rail; 9. and a folding frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The invention relates to a brake auxiliary system for an automobile, which is fixedly connected with an automobile body and comprises a direction sensor, an acceleration sensor, a control processor, a driving device, a second brake mechanical unit, a speed sensor and a brake calculating device; the direction sensor and the acceleration sensor are respectively connected with the control processor, the control processor is connected with the driving motor, when sensing signals transmitted to the controller by the direction sensor and the acceleration sensor meet specific conditions, the control processor sends control signals to the driving device, and the driving device drives the second braking mechanical unit to perform braking operation. The speed sensor and the brake calculating device are connected with the control processor.

The direction sensor, acceleration sensor, speed sensor of the invention can be arranged in the front of the vehicle, for example at the grille of the vehicle head.

During actual road travel, there are a number of unexpected situations. For example, the driver finds out that conditions such as emergency braking, road intruders accidentally occur in the front, and the like, and needs to brake within a short braking distance. In this case, the conventional braking device brakes the wheel or the transmission shaft by using friction, which requires a certain braking distance, and if the emergency braking distance is shorter than the braking distance, an unnecessary collision may occur. Further, for example, in winter, when a road is frozen, friction between the ground and the wheels is reduced, and even if a tire chain is attached to the outside of the wheels, the vehicle may slip when braked by a general brake device. For example, if a vehicle in a parking waiting state is driven at a high speed and collides with a parked vehicle, the parked vehicle may slide at a high speed, which may cause injuries and deaths, damages to the vehicle, and a secondary collision.

In order to solve the problems, the invention provides a brake auxiliary system for an automobile, which can automatically run after the automobile is started and can be actively operated by a driver, so that the occurrence of accidents is reduced, and the damage caused by the accidents is reduced after the accidents occur.

The system of the invention adopts a plurality of sensors to collect the acceleration, direction and speed of the vehicle in a starting state within a period of time and calculate the running state of the vehicle. The direction sensor collects three-axis direction information, the acceleration sensor collects acceleration information, and the speed sensor collects speed information. The brake calculation device records instantaneous speed values at each moment within a certain time (for example, two minutes), records the starting moment of the normal brake device after the normal brake device (namely, a conventional brake device installed on an automobile) is started, calculates the time difference between the starting moment of the normal brake device and the current moment in real time, calculates the speed difference between the speed at the starting moment of the normal brake device and the speed at the current moment in real time, counts and summarizes the pressing amplitude of the normal brake device from the starting moment to the current moment in real time, and takes the pressing amplitude at each moment as time as an abscissa to obtain an integral value, wherein the integral value is a normal brake input value.

During initialization, the storage device of the brake calculation device stores a corresponding relation table of time difference, speed difference and normal brake input value of common road conditions. After the vehicle runs on the road, the brake calculation device starts to compare the obtained corresponding time difference, speed difference and normal brake input value in a certain time period with the corresponding value and corresponding relation of the common road condition in the storage device according to the brake condition, so as to judge the current road condition. Obtaining a current braking input threshold value table according to the current road condition; the brake input threshold value table is a normal brake input threshold value corresponding to a speed value and a speed difference, for example, the normal brake input threshold values corresponding to 120km/h deceleration to 110km/h and 50km/h deceleration to 40km/h are different; under the condition of high-speed running, once the normal brake input value is found to be larger than the normal brake input threshold value, and the corresponding brake speed value is smaller than the brake speed threshold value, which means that the friction force on the road surface is possibly insufficient, at the moment, according to the proportion that the normal brake input value is larger than the normal brake input threshold value, the control processor gives a signal to the driving device, and an electric hydraulic push rod and/or an electric cylinder of the driving device receive the signal, so that the ground friction unit rubs the ground in a point motion mode or a pressing mode, and the corresponding brake effect is obtained.

In some cases, the vehicle is turning, the vehicle direction sensor senses that the vehicle has a lateral acceleration, and if an instantaneous value sensed by the direction sensor is greater than a threshold value, it indicates that the turning speed is too fast, and possibly the lateral acceleration is generated due to a side collision, and at this time, the control processor gives a signal to the driving device, and an electric hydraulic push rod and/or an electric cylinder of the driving device receive the signal, so that the ground friction unit rubs the ground in a inching manner or a pressing mode, and a corresponding braking effect is obtained.

In other cases, the instantaneous value of the acceleration sensor is larger than the acceleration threshold value, and the control processor immediately gives a signal to the driving device, and an electric hydraulic push rod and/or an electric cylinder of the driving device receive the signal, so that the ground friction unit rubs the ground in a inching mode or a pressing mode, and a corresponding braking effect is obtained.

The above is the automatic operating state of the brake assistance system in the automatic operating condition. The device also comprises a manual operation device which directly inputs mechanical energy converted from biological energy of a driver and mechanical energy converted from electric energy under the control of signals of a control button controlled by the driver to the second braking mechanical unit, and the braking auxiliary system can directly brake by the input mode, so that accidents are avoided.

Fig. 2 to 4 are schematic diagrams of a second braking mechanism unit of a brake assist system for an automobile, which includes a mounting plate 1, a driving device 2, a lifting unit and a ground friction unit, wherein the mounting plate 1 is fixedly mounted on an automobile chassis, the driving device 2 is mounted on the front side of the mounting plate 1, the output end of the driving device 2 is connected with the lifting unit, the top of the lifting unit is mounted on the mounting plate 1, and the bottom of the lifting unit is mounted on the ground friction unit. The output end of the driving device 2 drives the lifting unit to realize the lifting effect, when the auxiliary brake is needed to be intervened, the ground friction unit is contacted with the ground under the action of the lifting unit, the contact between the vehicle and the ground is increased when the vehicle is braked, the vehicle can realize the speed reduction or parking effect in a short distance, and the vehicle safety is improved.

The ground friction unit comprises a fixed plate 3 and friction plates 4, the fixed plate 3 is connected with the bottom of the lifting unit, the friction plates 4 are fixedly connected to the lower surface of the fixed plate 3, and a plurality of friction grooves which are arranged in a staggered mode are formed in the lower surface of each friction plate 4. Friction disc 4 can adopt the tire tread to make, and fixed plate 3 supports friction disc 4, can realize better friction effect through the friction slot of friction disc 4, and when the wearing and tearing of follow-up friction disc 4 seriously need to be changed, can be convenient for change, practices thrift its maintenance cost.

In a further preferred embodiment of the present invention, the fixing plate 3 and the friction plate 4 are both provided with through holes, and the fixing plate 3 is provided with a resistance adding member 5. The friction plate 4 is buffered by the resistance adding piece 5, and meanwhile, the friction effect between the device and the ground can be increased, so that the abrasion of the device when the device is in instant contact with the ground is further reduced, and the braking effect of the device is enhanced.

In this embodiment, it is further preferable that the resistance adding member 5 includes a fixed portion 51, a movable portion 52 and a buffering portion 53, the fixed portion 51 is fixedly connected to a side of the fixed plate 3 facing away from the friction plate 4, the buffering portion 53 is installed on an inner side of the fixed portion 51, the movable portion 52 is slidably disposed on an inner side of the fixed portion 51 and is fixedly connected to the buffering portion 53, and the movable portion 52 is movably disposed in the two through holes. The end surface of the movable part 52 is lower than the lower surface of the friction plate 4, so that the end surface of the movable part 52 firstly contacts the ground, the abrasion effect of the friction plate 4 in instant contact is reduced, the buffer part 53 applies pressure to the movable part 52, the friction effect is increased, and the braking distance of the vehicle is further shortened.

In this embodiment, it is further preferable that the through hole on the friction plate 4 is a T-shaped hole with a large bottom and a small top, and the bottom of the movable portion 52 is a T-shaped structure and is provided with a cushion layer made of the same material as the friction plate 4. The bottom of the movable part 52 is of a T-shaped structure, so that the friction plate 4 can be tightly attached to the bottom surface of the fixed plate 3 during friction braking, and the friction plate 4 is prevented from moving backwards or falling off due to overlarge acting force at the moment of contacting the bottom surface.

In this embodiment, it is further preferable that the opposite sides of the fixing plate 3 and the friction plate 4 are both in a sawtooth structure. The use effect of the device can be greatly improved, and the friction plate is prevented from moving backwards or falling off due to overlarge acting force at the moment of contacting the bottom surface.

In a further preferable scheme in this embodiment, a connecting member 6 is rotatably connected to a tail portion of the fixing plate 3, and one end of the connecting member 6, which is far away from the fixing plate 3, is slidably connected to a chassis of the vehicle.

Further preferred scheme in this embodiment, the lift unit includes guide rail one 7, two 8 of guide rail and folding leg 9, guide rail one 7 fixed mounting is on mounting panel 1, two 8 fixed mounting of guide rail are on fixed plate 3, the top and the bottom of folding leg 9 all are equipped with two tie points, one at top the tie point is rotated and is connected on guide rail one 7, another swing joint just is connected with drive arrangement 2's output in the track of guide rail one 7, one at bottom the tie point is rotated and is connected on guide rail two 8, another swing joint is in the track of guide rail two 8. The output shaft of the driving device 2 drives the connection point on the movable side of the folding frame 9 to move, so that the lifting effect of the fixing plate 3 and the friction plate 4 is realized.

In this embodiment, it is further preferable that the folding leg 9 is formed by two stop rods that are crossed and rotatably connected through a rotating shaft.

The embodiment can be implemented as follows: the driving device 2 is started to drive the movable connection point on one side of the folding frame 9 to move inside the tracks of the first guide rail 7 and the second guide rail 8 respectively, so that the fixed plate 3 and the friction plate 4 move downwards, the cushion layer of the movable part 52 of the resistance adding piece 5 firstly contacts the ground, then the movable part 52 presses the lower part under the action of the buffer part 53, the friction effect is gradually increased, and the friction plate 4 contacts the ground to realize braking.

The situation of the road is different in different situations. For example, under the condition that the friction force is slightly insufficient, the control processor judges that the electric hydraulic push rod runs to a proper position by giving a certain signal to the electric hydraulic push rod, and simultaneously gives a corresponding signal to the electric cylinder, and the electric cylinder brakes the road in a inching braking mode. Therefore, partial resistance can be increased, the ground friction unit cannot be damaged greatly, and the direction of the vehicle cannot be out of control due to the driving direction and the driving speed. In some situations, such as where friction is sufficient but the acceleration of the vehicle is much greater than the threshold, where it is desirable to reduce the acceleration of the vehicle as much as possible, the control processor signals the electrohydraulic push rod to operate in a position such that the ground engaging friction unit is pressed into contact with the road surface for a long period of time, thereby reducing the acceleration of the vehicle as much as possible. Through the selection and combination of the inching brake and the pressing friction brake, the auxiliary brake device can well reduce the damage of the device on one hand, and can avoid the out-of-control of the vehicle running direction caused by the influence of the brake position on the other hand.

Under the running condition of the vehicle, the auxiliary system is always in a working state, and the control processor monitors the working state of each part.

The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto. The substitution may be of partial structures, devices, method steps, or may be a complete solution. The technical solution and the inventive concept thereof according to the present invention should be equally replaced or changed within the protection scope of the present invention.