CN111038456A - Multifunctional auxiliary wheel mechanism for emergency braking of passenger vehicle and control method thereof - Google Patents
Multifunctional auxiliary wheel mechanism for emergency braking of passenger vehicle and control method thereof Download PDFInfo
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- CN111038456A CN111038456A CN201911146431.8A CN201911146431A CN111038456A CN 111038456 A CN111038456 A CN 111038456A CN 201911146431 A CN201911146431 A CN 201911146431A CN 111038456 A CN111038456 A CN 111038456A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T1/00—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles
- B60T1/02—Arrangements of braking elements, i.e. of those parts where braking effect occurs specially for vehicles acting by retarding wheels
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C17/00—Tyres characterised by means enabling restricted operation in damaged or deflated condition; Accessories therefor
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Abstract
本发明公开了乘用车应急制动多功能辅助轮机构，包括伸缩柱、拐形轮腿、轮轴、辅助小轮和制动机构，伸缩柱以车辆中轴线为对称轴成对设置于车辆的两侧且位于车辆的前后轮之间，伸缩柱刚性连接于车辆的底面，拐形轮腿套设于所述伸缩柱的伸缩端，拐形轮腿与伸缩柱的伸缩端转动连接，轮轴与拐形轮腿固定连接，辅助小轮与轮轴转动连接，拐形轮腿的转动轴线为竖直方向，辅助小轮的转动轴线为水平方向，制动机构用于制动辅助小轮，拐形轮腿的转动角度小于车辆的前轮最大转向角度。本发明还公开了乘用车应急制动多功能辅助轮机构的控制方法，本发明可增加制动摩擦或者提供支撑，减小制动侧滑、车辆倾覆的发生。
The invention discloses a multifunctional auxiliary wheel mechanism for emergency braking of a passenger vehicle, which comprises a telescopic column, a turning wheel leg, a wheel axle, an auxiliary wheel and a braking mechanism. Both sides are located between the front and rear wheels of the vehicle, the telescopic column is rigidly connected to the bottom surface of the vehicle, the turning wheel legs are sleeved on the telescopic end of the telescopic column, the turning wheel legs are rotatably connected with the telescopic end of the telescopic column, and the wheel axle The turning wheel legs are fixedly connected, the auxiliary small wheel is rotatably connected with the axle, the rotation axis of the turning wheel leg is vertical, and the rotation axis of the auxiliary small wheel is the horizontal direction. The turning angle of the wheel legs is less than the maximum steering angle of the front wheels of the vehicle. The invention also discloses a control method for the emergency braking multifunctional auxiliary wheel mechanism of a passenger vehicle, which can increase braking friction or provide support, and reduce the occurrence of braking side slip and vehicle overturning.
Description
Technical Field
The invention relates to a brake auxiliary wheel mechanism and a control method thereof, in particular to a multifunctional auxiliary wheel mechanism for emergency braking of a passenger vehicle and a control method thereof.
Background
Safety and energy conservation are the constant subjects of the development of the automobile industry. With the improvement of living standard of people, automobile manufacturers and automobile owners have raised higher and higher requirements on the active safety of automobiles. At present, four-wheel braking is basically adopted for passenger cars, and the braking distance is usually too long due to insufficient ground adhesion, so that traffic accidents are caused. Sometimes, when a passenger car runs on a difficult road, single wheels or multiple wheels are trapped in pot holes or suspended in the air, so that the problem that the car body overturns is caused. Sometimes, the automobile body suddenly loses balance due to tire damage and tire burst during the running process of the automobile.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a multifunctional auxiliary wheel mechanism for emergency braking of a passenger vehicle, which increases braking friction or provides support through an auxiliary wheel, thereby reducing occurrence of braking sideslip and vehicle overturn, and improving vehicle safety. The invention aims to provide a control method of a multifunctional auxiliary wheel mechanism for emergency braking of a passenger vehicle.
The technical scheme of the invention is as follows: a multifunctional auxiliary wheel mechanism for emergency braking of a passenger vehicle comprises telescopic columns, turning wheel legs, a wheel shaft, auxiliary small wheels and a braking mechanism, wherein the telescopic columns are arranged on two sides of the vehicle in pairs by taking a vehicle central axis as a symmetry axis and are positioned between front wheels and rear wheels of the vehicle, the telescopic columns are rigidly connected to the bottom surface of the vehicle, the telescopic ends of the telescopic columns are arranged downwards, the turning wheel legs are sleeved at the telescopic ends of the telescopic columns, the turning wheel legs are rotatably connected with the telescopic ends of the telescopic columns, the wheel shaft is fixedly connected with the turning wheel legs, the auxiliary small wheels are rotatably connected with the wheel shaft, the rotating axes of the turning wheel legs are in a vertical direction, the rotating axes of the auxiliary small wheels are in a horizontal direction, the braking mechanism is arranged on the auxiliary small wheels and is used for braking the auxiliary small wheels, and the telescopic ends of the telescopic columns are provided with transverse limiting pins, the turning wheel leg is provided with a limiting groove matched with the limiting pin, and the limiting pin is limited by the limiting groove to enable the rotation angle of the turning wheel leg to be smaller than the maximum steering angle of the front wheel of the vehicle.
The auxiliary small wheel is lowered by utilizing the telescopic structure of the telescopic column when the vehicle is emergently braked or the wheel is suspended or blown out, the auxiliary small wheel is braked during emergently braking, the friction with the ground is increased so as to reduce the braking distance, and the auxiliary small wheel is not braked when the wheel is suspended or blown out so as to perform auxiliary support on the vehicle by the auxiliary small wheel and reduce the possibility of overturning the vehicle. By limiting the steering angle of the auxiliary small wheels, lateral braking force can be provided when the automobile is emergently braked and sideslips so as to weaken the sideslip action of the automobile and avoid the tail flicking of the automobile.
Furthermore, in order to enable the auxiliary small wheels to have the effect of improving friction to the maximum extent and avoid the phenomenon that the auxiliary small wheels weaken the braking effect along the track of the front wheel, the auxiliary small wheels are arranged by deviating from the connecting line of the front wheel and the rear wheel of the vehicle, and the track of the auxiliary small wheels is smaller than the track of the front wheel of the vehicle.
Further, flexible post is including overlapping the flexible post urceolus, flexible post inner tube and the flexible post piston skirt portion of establishing and sliding connection in proper order, flexible post piston skirt portion and flexible post piston rod rigid connection, flexible post piston rod lower extreme and support rigid connection, the support with the both sides of flexible post urceolus are respectively with spring coupling.
The brake mechanism comprises a wheel cylinder support, a wheel cylinder body, a brake friction plate and a brake disc, the wheel cylinder support is rigidly connected with the wheel shaft, the wheel cylinder support is provided with a sliding hole which is slidably connected with the wheel cylinder body, the axis of the sliding hole is parallel to the rotation axis of the auxiliary small wheel, the brake disc is rigidly connected with the auxiliary small wheel, the wheel cylinder body is provided with a brake groove, the brake friction plate is arranged on one side of the brake groove, an oil cavity is arranged on the other side of the brake groove, a wheel cylinder piston is arranged in the oil cavity, the front end of the wheel cylinder piston is provided with the brake friction plate, the edge of the brake disc is arranged between the brake friction plates on the two sides of the brake groove, and a wheel cylinder return spring is connected between the wheel cylinder piston.
Further, including oil tank, hydraulic pump, flexible post oil pipe and wheel cylinder brake oil pipe, the hydraulic pump with the oil tank is connected, hydraulic pump exit linkage high pressure fuel pipe, oil return pipe is connected to the oil tank, flexible post oil pipe's one end with flexible post intercommunication, flexible post oil pipe's the other end through flexible post oil pipe valve block with high pressure fuel pipe with return oil pipe alternative intercommunication, wheel cylinder brake oil pipe's one end with the oil pocket intercommunication, wheel cylinder brake oil pipe's the other end pass through wheel cylinder brake oil pipe valve block with high pressure fuel pipe with return oil pipe alternative intercommunication.
The controller controls the hydraulic pump, the telescopic column oil pipe valve plate and the wheel cylinder brake oil pipe valve plate to act.
A control method of a multifunctional auxiliary wheel mechanism for emergency braking of a passenger vehicle is carried out based on the multifunctional auxiliary wheel mechanism for emergency braking of a passenger vehicle of claim 6, and comprises the steps that a controller receives signals of a deceleration sensor, a tire pressure sensor and a wheel load sensor, and when a tire pressure signal measured by the tire pressure sensor is less than or equal to a tire pressure threshold value or a wheel load signal measured by the wheel load sensor is less than or equal to a wheel load threshold value, the controller controls a hydraulic pump to pump oil and controls a telescopic column oil pipe valve plate to enable a telescopic column oil pipe to be communicated with a high-pressure oil pipe until the tire pressure signal is greater than the tire pressure threshold value and the wheel load signal is greater than the wheel load threshold value, the hydraulic pump is controlled to stop pumping oil and controls the telescopic column oil pipe valve plate to enable the telescopic column oil pipe to be; when the deceleration absolute value signal is larger than or equal to the deceleration threshold, the hydraulic pump is controlled to pump oil, and the telescopic column oil pipe valve plate and the wheel cylinder brake oil pipe valve plate are controlled to enable the telescopic column oil pipe and the wheel cylinder brake oil pipe to be communicated with the high-pressure oil pipe directly, and when the deceleration signal is smaller than the deceleration threshold, the telescopic column oil pipe valve plate and the wheel cylinder brake oil pipe valve plate are controlled to enable the telescopic column oil pipe and the wheel cylinder brake oil pipe to be communicated with the oil return pipe.
The technical scheme provided by the invention has the advantages that the auxiliary small wheel is utilized to provide extra friction force to reduce the braking distance during emergency braking, the auxiliary small wheel is arranged between the front wheel and the rear wheel, and the auxiliary small wheel can also increase the lateral braking force to reduce the sideslip when the vehicle sends sideslip due to the steering limitation (the steering angle is smaller than that of the front wheel), and compared with a balance control system for distributing the braking force of the wheels, the control mode is much simpler and easier, and the auxiliary small wheel can be used for the situation after the sideslip occurs. In addition, the auxiliary small wheels provide an additional supporting function, and the suspended side turning of the wheels caused by the vehicle running on a narrow road surface can be avoided.
Drawings
FIG. 1 is a schematic structural diagram of a multifunctional auxiliary wheel mechanism for emergency braking of a passenger vehicle.
FIG. 2 is an enlarged view of a portion of the hydraulic caliper.
Fig. 3 is a hydraulic control diagram.
Fig. 4 is a view taken along direction a of fig. 1.
Fig. 5 is a side view of the vehicle body.
Fig. 6 is a cross-sectional view of the telescopic column.
Fig. 7 is a sectional view of the stopper pin.
Fig. 8 is a schematic diagram of three states of the hydraulic valve.
Fig. 9 is a schematic view of the arrangement of the wheels and the auxiliary small wheels.
Fig. 10 is a schematic view of the steering angle of the wheels and the auxiliary small wheels.
Detailed description of the invention
The present invention is further illustrated by the following examples, which are not to be construed as limiting the invention thereto.
Referring to fig. 1 to 10, a multifunctional auxiliary wheel mechanism for emergency braking of a passenger vehicle according to an embodiment of the present invention includes: the bottom surface of a passenger vehicle body 1 is rigidly connected with a telescopic column outer cylinder 2, and the telescopic column outer cylinder 2 is internally provided with two layers of structures: the telescopic column inner cylinder 4, the telescopic column piston skirt part 5 and the three parts are sequentially connected in a sliding manner from outside to inside, so that the telescopic column inner cylinder 4 and the telescopic column piston skirt part 5 can slide up and down, the telescopic column piston skirt part 5 is rigidly connected with a telescopic column piston rod 9, the lower end of a telescopic column piston rod 9 is rigidly connected with a support 6, the support 6 is connected with the two sides of a telescopic column outer cylinder 2 by springs 3 respectively, the telescopic column piston rod 9 and a cranked wheel leg upper sleeve 10 are connected by a limit pin 7 rigidly connected with the telescopic column piston rod 9 and a limit groove 8 formed in the cranked wheel leg upper sleeve 10, the cranked wheel leg upper sleeve 10 is provided with the limit groove 8, and the limit pin 7 has the maximum rotation angle phi in the limit groove 81Less than the maximum angle of rotation phi of the front wheels (according to the Ackerman steering principle)). This not only allows the auxiliary small wheel 25 to turn with the vehicle body 1, but also prevents the brake pipe from being wound when the auxiliary small wheel 25 turns for many turns. Because the maximum rotation angle of the auxiliary small wheel 25 is less than phi, the auxiliary small wheel 25 can rotate to the limit position when the automobile sideslips, a certain lateral braking force can be provided, and the sideslip behavior of the automobile is weakened. The auxiliary small wheel 25, the front wheel 40 and the rear wheel 41 are not on the same track line, so that the auxiliary small wheel 25 and the other four wheels are prevented from just falling to an area with a small adhesion coefficient when the automobile is braked on a difficult road surface, such as the road surface with accumulated snow or frozen patches.
The upper sleeve 10 of the crank-shaped wheel leg is rigidly connected with the crank-shaped wheel leg 11, because the crank-shaped wheel leg 11 adopts a rear crank structure, the rotation torque generated by the ground friction force on the auxiliary small wheel 25 to the axis of the telescopic column outer cylinder 2 enables the rotation direction of the auxiliary small wheel 25 to always follow the direction of the vehicle body 1, the auxiliary small wheel 25 can automatically turn along with the vehicle body 1, the crank-shaped wheel leg 11 is rigidly connected with the wheel shaft 13, the wheel shaft 13 is connected with the flange 27 through an L-shaped bearing, the flange 27 is respectively and rigidly connected with the brake disc 14 and the auxiliary small wheel 25, so that the brake disc 14 and the auxiliary small wheel 25 can synchronously rotate, and the telescopic column piston comprises a telescopic column piston skirt 5 and a telescopic column piston rod 9.
Because the load can move forward when the automobile is braked, the auxiliary small wheel 25 is arranged at the position close to the front of the middle part of the automobile body, and the automobile is equivalent to an idle wheel to play a supporting role when a tire of the automobile is broken or a certain wheel is suspended. Meanwhile, in order to prevent the outer wheels of the automobile from being suspended on a narrow road surface and prevent the auxiliary small wheels 25 from invading the right of the road of the adjacent parallel vehicles, the vehicles provided with the device are not limited by the width of the road, and the auxiliary small wheels 25 are arranged on the inner sides of the left and right track lines.
The wheel cylinder bracket 29 is rigidly connected with the wheel shaft 13, the wheel cylinder bracket 29 is slidably connected with the wheel cylinder body 28 through a wheel cylinder gasket 30, so that the wheel cylinder body 28 can move leftwards through the reaction force provided by the left brake friction plate 32 until the braking force provided by the two brake friction plates 32 is the same during braking, the wheel cylinder return spring 31 is rigidly connected with the wheel cylinder body 28 and the wheel cylinder piston 33 respectively, the left brake friction plate 32 is rigidly connected with the wheel cylinder piston 33, and the right brake friction plate 32 is rigidly connected with the wheel cylinder body 28.
A tire pressure sensor 34 and a wheel load sensor 35 are respectively arranged in four wheels of a passenger vehicle for respectively detecting tire pressure and tire load, the passenger vehicle is provided with a deceleration sensor 36, the tire pressure sensor 34, the wheel load sensor 35 and the deceleration sensor 36 collect signals and send the signals to an ECU controller 21, the ECU controller 21 controls a hydraulic pump 24 and control motors of a wheel cylinder brake oil pipe valve plate 17 and a telescopic column oil pipe valve plate 19, the hydraulic pump 24 pumps oil to a high-pressure oil pipe 37, the oil passes through a high-pressure oil pipe one-way valve 22, two ends of the high-pressure oil pipe 37 are provided with a wheel cylinder brake oil pipe tee joint 18, a telescopic column oil pipe tee joint 20, the telescopic column oil pipe tee joint 20 is respectively connected with a telescopic column oil pipe 15 and a wheel cylinder brake oil pipe 16 and is connected with an oil return pipe 37, the wheel cylinder brake oil pipe tee joint 18 is provided, the wheel cylinder brake, the control motors of the wheel cylinder brake oil pipe valve plates 17 and the telescopic pillar oil pipe valve plates 19 select the rotation directions of the wheel cylinder brake oil pipe valve plates 17 and the telescopic pillar oil pipe valve plates 19 according to a control command sent by the ECU21 to control whether the telescopic pillar oil pipe 15 and the wheel cylinder brake oil pipe 16 are communicated with oil or not, and after the work is finished, the oil returns to the oil tank 23 through the oil return pipe 37 after the switch 39 is turned off.
The control method of the multifunctional auxiliary wheel mechanism for emergency braking of the passenger vehicle comprises the following steps:
when the device is not needed to work, the switch 39 needs to be turned off manually (for example, the automobile is in a maintenance state when being lifted in a repair shop, tires are replaced, and the like), and the system is in a standby state only when the switch 39 is turned on manually, so that the following work can be performed.
When the deceleration sensor 36 detects the deceleration ay of the vehicle body 1 ≦ ay0(e.g. ay)0-0.6g) is started, the deceleration sensor 36 sends a signal to the ECU controller 21, the ECU controller 21 sends a control command to the hydraulic pump 24 to start pumping oil, the ECU controller 21 sends a signal to the control motors of the wheel cylinder brake oil pipe valve plate 17 and the telescopic column oil pipe valve plate 19, the wheel cylinder brake oil pipe valve plate 17 rotates 90 degrees counterclockwise, the telescopic column oil pipe valve plate 19 rotates 90 degrees clockwise, oil is led to the telescopic column oil pipe 15 and the wheel cylinder brake oil pipe 16 respectively at the high pressure oil pipe 37 through the high pressure oil pipe check valve 22, and when the high pressure oil is pumped, the oil is led to the telescopic column oil pipe 15 and theWhen entering the telescopic column outer cylinder 2 through the telescopic column oil pipe 15, the high-pressure oil pushes the telescopic column piston skirt part 5 and the telescopic column inner cylinder 4 to pop out, the telescopic column piston rod 9 is driven, the crank-shaped wheel leg upper sleeve 10 and the crank-shaped wheel leg 11 enable the auxiliary small wheel 25 to pop out to be in contact with the ground, meanwhile, high-pressure oil enters the wheel cylinder through the wheel cylinder brake oil pipe 16 to push the wheel cylinder piston 33 and drive the left brake pad 32 to press the brake disc 14, and the wheel cylinder body 28 is also shifted to the left by the reaction force provided by the left brake pad 32 until the braking forces provided by the brake pads 32 on both sides are the same, because the crank-shaped wheel leg 11 adopts a rear-crank structure, the rotation torque generated by the ground friction force on the auxiliary small wheel 25 to the axis of the telescopic column outer cylinder 2 enables the rotation direction of the auxiliary small wheel 25 to always follow the direction of the vehicle body 1, and the auxiliary small wheel 25 can automatically steer along with the vehicle body 1. The sliding state of the auxiliary small wheel 25 can be between the locking or the optimum slip rate, so that the braking force coefficient is in the sliding adhesion coefficient phisOr peak adhesion coefficient phipIn addition, the braking force can be increased on the ground and the braking distance can be shortened on the whole. At braking deceleration ay of the whole set of control device>ay0 is not activated.
When the wheel load sensor 35 detects any tire load N is less than or equal to N0(e.g. N)0100N), the system is started, the wheel load sensor 35 sends a signal to the ECU controller 21, the ECU controller 21 sends a control command to the hydraulic pump 24 to start pumping oil, meanwhile, the ECU controller 21 sends a signal to the control motors of the wheel cylinder brake oil pipe valve plate 17 and the telescopic column oil pipe valve plate 19, the wheel cylinder brake oil pipe valve plate 17 rotates 90 degrees clockwise, the telescopic column oil pipe valve plate 19 rotates 90 degrees clockwise, high-pressure oil only enters the telescopic column oil pipe 15, the high-pressure oil pushes the telescopic column piston skirt portion 5 and the telescopic column inner cylinder 4 to pop out, the telescopic column piston rod 9 and the crank-shaped wheel leg upper sleeve 10 are driven simultaneously, and the crank-shaped wheel leg 11 enables the auxiliary small wheel 25 to pop out to be in contact with the ground to play a supporting role.
When the tire pressure sensor 34 detects any tire pressure p ≦ p0(without providing p)00.1kpa), the tire pressure sensor 34 sends a signal to the ECU controller 21, the ECU controller 21 sends a control command to the hydraulic pump 24 to start pumping oil, and the ECU controller starts pumping oil at the same time21, a signal is sent to a control motor of a wheel cylinder brake oil pipe valve plate 17 and a telescopic column oil pipe valve plate 19, the wheel cylinder brake oil pipe valve plate 17 rotates 90 degrees clockwise, the telescopic column oil pipe valve plate 19 rotates 90 degrees clockwise, high-pressure oil only flows into the telescopic column oil pipe 15, the high-pressure oil pushes a telescopic column piston skirt part 5 and a telescopic column inner cylinder 4 to pop out and simultaneously drives a telescopic column piston rod 9 and a crank-shaped wheel leg upper sleeve 10, and the crank-shaped wheel leg 11 enables an auxiliary small wheel 25 to pop out to be in contact with the ground so as to play.
The telescopic column piston and wheel cylinder piston 33 are retracted and all reset when the switch 39 is manually turned off, and the system is in a standby ready state when the switch 39 is again manually turned on.
Claims (7)
1. A multifunctional auxiliary wheel mechanism for emergency braking of a passenger vehicle is characterized by comprising telescopic columns, turning wheel legs, a wheel shaft, auxiliary small wheels and a braking mechanism, wherein the telescopic columns are arranged on two sides of the vehicle in pairs by taking a central axis of the vehicle as a symmetry axis and are positioned between front wheels and rear wheels of the vehicle, the telescopic columns are rigidly connected to the bottom surface of the vehicle, the telescopic ends of the telescopic columns are arranged downwards, the turning wheel legs are sleeved at the telescopic ends of the telescopic columns, the turning wheel legs are rotatably connected with the telescopic ends of the telescopic columns, the wheel shaft is fixedly connected with the turning wheel legs, the auxiliary small wheels are rotatably connected with the wheel shaft, the rotating axes of the turning wheel legs are in a vertical direction, the rotating axes of the auxiliary small wheels are in a horizontal direction, the braking mechanism is arranged on the auxiliary small wheels and is used for braking the auxiliary small wheels, and the telescopic ends of the telescopic columns are provided with transverse limiting pins, the turning wheel leg is provided with a limiting groove matched with the limiting pin, and the limiting pin is limited by the limiting groove to enable the rotation angle of the turning wheel leg to be smaller than the maximum steering angle of the front wheel of the vehicle.
2. The multifunctional auxiliary wheel mechanism for emergency braking of passenger vehicles according to claim 1, characterized in that the auxiliary small wheels are arranged offset from the connecting line of the front wheels and the rear wheels of the vehicle, and the track of the auxiliary small wheels is smaller than the track of the front wheels of the vehicle.
3. The multifunctional auxiliary wheel mechanism for emergency braking of passenger vehicles according to claim 1, wherein the telescopic column comprises a telescopic column outer cylinder, a telescopic column inner cylinder and a telescopic column piston skirt which are sequentially sleeved and slidably connected, the telescopic column piston skirt is rigidly connected with a telescopic column piston rod, the lower end of the telescopic column piston rod is rigidly connected with a support, and the support is respectively connected with two sides of the telescopic column outer cylinder through springs.
4. Passenger vehicle emergency brake multifunction auxiliary wheel mechanism according to claim 1, the brake mechanism comprises a wheel cylinder bracket, a wheel cylinder body, a brake friction plate and a brake disc, the wheel cylinder bracket is rigidly connected with the wheel axle, the wheel cylinder bracket is provided with a sliding hole which is connected with the wheel cylinder body in a sliding way, the axis of the sliding hole is parallel to the rotation axis of the auxiliary small wheel, the brake disc is rigidly connected with the auxiliary small wheel, the wheel cylinder body is provided with a brake groove, one side of the brake groove is provided with a brake friction sheet, an oil cavity is arranged at the other side of the brake groove, a wheel cylinder piston is arranged in the oil cavity, a brake friction plate is arranged at the front end of the wheel cylinder piston, the edge of the brake disc is arranged between the brake friction plates on two sides of the brake groove, and a wheel cylinder return spring is connected between the wheel cylinder piston and the wheel cylinder body.
5. The multifunctional auxiliary wheel mechanism for emergency braking of passenger vehicles according to claim 4, comprising an oil tank, a hydraulic pump, a telescopic column oil pipe and a wheel cylinder brake oil pipe, wherein the hydraulic pump is connected with the oil tank, the hydraulic pump is connected with a high-pressure oil pipe through an outlet, the oil tank is connected with an oil return pipe, one end of the telescopic column oil pipe is communicated with the telescopic column, the other end of the telescopic column oil pipe is communicated with the high-pressure oil pipe and the oil return pipe through a telescopic column oil pipe valve plate, one end of the wheel cylinder brake oil pipe is communicated with the oil cavity, and the other end of the wheel cylinder brake oil pipe is communicated with the high-pressure oil pipe and the oil return pipe through a wheel cylinder brake.
6. The multifunctional auxiliary wheel mechanism for emergency braking of passenger vehicles according to claim 5, characterized by comprising a controller, a deceleration sensor, a tire pressure sensor and a wheel load sensor, wherein the deceleration sensor, the tire pressure sensor and the wheel load sensor are connected with the controller, and the controller controls the hydraulic pump, the telescopic column oil pipe valve plate and the wheel cylinder brake oil pipe valve plate to act.
7. A control method of a multifunctional auxiliary wheel mechanism for emergency braking of a passenger vehicle is characterized in that, the control method is carried out on the basis of the multifunctional auxiliary wheel mechanism for emergency braking of passenger cars as claimed in claim 6, the control method includes the controller receiving signals of the deceleration sensor, the tire pressure sensor, and the wheel load sensor, when the tire pressure signal measured by the tire pressure sensor is less than or equal to the tire pressure threshold value or the wheel load signal measured by the wheel load sensor is less than or equal to the wheel load threshold value, the controller controls the hydraulic pump to pump oil and controls the telescopic column oil pipe valve plate to enable the telescopic column oil pipe to be communicated with the high-pressure oil pipe until the tire pressure signal is greater than the tire pressure threshold value and the wheel load signal is greater than the wheel load threshold value, the hydraulic pump is controlled to stop pumping oil and the telescopic column oil pipe valve plate is controlled to enable the telescopic column oil pipe to be communicated with the oil return pipe; when the deceleration absolute value signal is larger than or equal to the deceleration threshold, the hydraulic pump is controlled to pump oil, and the telescopic column oil pipe valve plate and the wheel cylinder brake oil pipe valve plate are controlled to enable the telescopic column oil pipe and the wheel cylinder brake oil pipe to be communicated with the high-pressure oil pipe directly, and when the deceleration signal is smaller than the deceleration threshold, the telescopic column oil pipe valve plate and the wheel cylinder brake oil pipe valve plate are controlled to enable the telescopic column oil pipe and the wheel cylinder brake oil pipe to be communicated with the oil return pipe.
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| CN111717318A (en) * | 2020-07-01 | 2020-09-29 | 梅玲玲 | Intelligent child bicycle state monitoring system and method |
| CN112722074A (en) * | 2021-01-29 | 2021-04-30 | 常熟理工学院 | Automobile static turning device and control method thereof |
| CN112833120A (en) * | 2020-12-30 | 2021-05-25 | 重庆奥特比汽车制动系统有限公司 | A kind of ceramic brake pad structure and its formula |
| CN112977807A (en) * | 2021-04-19 | 2021-06-18 | 常熟理工学院 | Unmanned aerial vehicle arresting gear |
| WO2025084963A1 (en) * | 2023-10-16 | 2025-04-24 | Alkhaldi Khalid | Emergency system to drive a vehicle |
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| CN101456410A (en) * | 2008-12-30 | 2009-06-17 | 卢如年 | Automobile reinforcing brake auxiliary wheel system |
| CN201446945U (en) * | 2009-04-27 | 2010-05-05 | 金城集团有限公司 | Auxiliary braking device |
| CN106828449A (en) * | 2017-02-15 | 2017-06-13 | 宁波工程学院 | A kind of complemental brake system and its control method for shortening emergency stopping distance |
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