CN210101603U - Improved formula racing car brake mechanism without driver's driving - Google Patents
Improved formula racing car brake mechanism without driver's driving Download PDFInfo
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- CN210101603U CN210101603U CN201920587483.8U CN201920587483U CN210101603U CN 210101603 U CN210101603 U CN 210101603U CN 201920587483 U CN201920587483 U CN 201920587483U CN 210101603 U CN210101603 U CN 210101603U
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- brake
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- brake pedal
- bottom plate
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Abstract
The utility model discloses a modified formula car brake mechanism that drives without people, including bottom plate, slide rail, push rod, braking plate, hinge extension board, pin, connecting rod, rocker, motor, controller, pressure sensor, brake pedal arm, pulley, be used for the slide rail first reset spring that resets and be used for the second reset spring that the braking plate resets. The utility model discloses still have: 1. the design adopts a rigid rod with large bearing capacity, small deflection and strong reliability to replace a steel wire rope; 2. the motor spindle is connected with the rocker through a spline shaft, the motor rotates forwards to directly drive the rocker to rotate, so that the connecting rod is driven to translate, and the brake plate arm is driven to rotate by a corresponding angle, and the defects of untimely response and inaccurate track in the traditional winder are overcome; 3. 4 pulleys are additionally arranged at the bottom of the sliding rail and are matched with 2 sliding grooves formed in the frame to move, and the advantages that the mechanism deviation problem caused by the fact that the mechanism is not compact in the braking process is solved.
Description
Technical Field
The utility model relates to a vehicle braking technical field especially relates to a modified formula car brake mechanism that does not drive.
Background
At present, intelligent control and interconnection technology development are very variable, and unmanned driving is generated under the large environment. In order to promote talent development of the automotive industry in China, colleges and universities encourage students to modify the original gasoline racing car into an electric racing car, study unmanned driving technology and participate in the electric equation automobile competition (FSEC) of college students in China. The racing car should realize unmanned driving on the basis that a driver can safely drive according to the requirements of a big race. Among these, the retrofit of brake systems by wire is an especially important part.
In order to solve the problems, a patent technical scheme of 'CN 201720682283 a freely switchable unmanned automobile brake mechanism' is proposed by authors in the name of Yunfei et al, and the scheme is that a steel wire rope is added in front of a brake pedal and wound on an input shaft of a motor, and the motor rotates to drive a pull rope to pull the brake pedal to rotate so as to brake. However, in the practical application process, the scheme has the following defects: 1) the reliability of the steel wire rope is poor, and the steel wire rope has insecurity and instability; 2) the elastic deformation of the steel wire rope and the winding deviation of the winder easily cause the untimely braking response; 3) the mechanism is not compact, and the motion track of the mechanism is easy to deviate in the braking process. Accordingly, further improvements and improvements are needed in the art.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome prior art's not enough, provide a modified formula car brake mechanism of driverless.
The purpose of the utility model is realized through the following technical scheme:
the improved braking mechanism for formula racing car includes mainly base board, sliding rail, push rod, braking board, hinged support board, pin, connecting rod, rocker, motor, controller, pressure sensor, braking pedal arm, pulley, the first restoring spring for restoring the sliding rail and the second restoring spring for restoring the braking board.
Specifically, the bottom plate is fixedly arranged on the frame through bolts or is integrally designed with the frame; the slide rail sets up on the bottom plate, and pulley is installed to its both sides. The bottom plate is located the both sides of slide rail and is equipped with the spout, in the pulley embedding spout, realize that the slide rail slides on the spout. One end of the push rod is hinged with one end of the brake plate, and the other end of the push rod penetrates through the front end of the slide rail from inside to outside and is connected with the brake execution component. The rear end of the slide rail is hinged with the brake pedal arm. One end of the first reset spring is connected with the sliding rail, and the other end of the first reset spring is connected with the bottom plate to drive the sliding rail to restore to the original position. One end of the second reset spring is connected with the joint of the push rod and the brake plate, and the other end of the second reset spring is connected with the bottom plate to drive the push rod and the brake plate to reset. One end of the hinge support plate is hinged with the middle of the brake plate, and the other end of the hinge support plate is hinged with one end of the brake pedal arm. And one end of the brake pedal arm is also provided with a bulge for limiting the downward swinging amplitude of the hinge support plate. The bulge is positioned below the hinged support plate and is integrally designed with the brake pedal arm, so that the hinged support plate swings downwards and is propped by the bulge when automatic braking is realized, and the joint of the hinged support plate and the brake plate becomes a rotating fulcrum. One end of the connecting rod is hinged with the other end of the brake plate through a pin, and the other end of the connecting rod is hinged with one end of the rocker. The other end of the rocker is in transmission connection with the motor. The brake pedal is arranged at the other end of the brake pedal arm; the pressure sensor is arranged on the brake pedal. The controller is fixed on the bottom plate and is electrically connected with the motor and the pressure sensor respectively.
Further, for the drive efficiency who improves the motor, arrestment mechanism still includes the integral key shaft that is used for the transmission to connect. One end of the spline shaft is connected with the output shaft of the motor, and the other end of the spline shaft is connected with the other end of the rocker.
Specifically, the brake mechanism further comprises a hinged support and a ring belt pin, wherein the hinged support and the ring belt pin are used for realizing the hinging of the push rod and the brake plate. The hinged support is arranged at one end of the push rod, and the belt ring pin penetrates through the brake plate and the hinged support and connects the brake plate and the hinged support. One end of the second return spring is connected to the pin with the ring.
Further, in order to make first reset spring more firm, reliable with bottom and sliding linkage, arrestment mechanism is still including the first rings that are used for connecting first reset spring. The first lifting rings are respectively arranged on the sliding rail and the bottom plate, and two ends of the first reset spring are respectively connected and fixed with the sliding rail and the bottom plate through the first lifting rings.
Furthermore, in order to make the second reset spring be connected more firmly, reliably with the bottom plate, arrestment mechanism is still including the second rings that are used for connecting second reset spring. The second lifting ring is arranged on the bottom plate, so that the other end of the second reset spring is fixedly connected with the bottom plate through the second lifting ring.
Furthermore, in order to reduce the sliding distance between the sole and the brake pedal and influence the braking effect during braking, the braking mechanism of the utility model also comprises an anti-skid mat; the non-slip mat is arranged on the brake pedal and fixedly connected with the brake pedal.
As an optimal scheme, in order to improve the efficiency and the reliability that reset of brake pedal arm and braking plate, first reset spring and second reset spring all establish to the extension spring.
Further, in order to reduce the whole weight of arrestment mechanism, improve its performance, still be equipped with the fluting that is used for lightening on the brake pedal arm. The slot is located on a side of the brake pedal arm and extends from one side of the brake pedal arm to the other.
The utility model discloses a working process and principle are: the utility model provides a brake mechanism can switch the driving mode of car through a key switching button, automatic driving mode and manual driving mode promptly, under the general condition, a key switching button can set up in the position on for example steering wheel next door, make things convenient for the navigating mate to operate, when the vehicle switches to automatic driving mode, adopt the automatic braking mode, the barrier condition of detector real-time supervision vehicle front side on the unmanned vehicle, the signal of detector is received to the controller, realize automatic braking when the barrier appears. When in use, the method mainly comprises two modes: when the vehicle is switched to the manual driving mode, the manual braking mode is adopted. Under the manual braking mode, the detector controls the motor to be in an out-of-operation state, manual braking and automatic braking do not interfere with each other, and free switching can be achieved. The specific operating method for the two braking modes is as follows: during manual braking, a driver steps on a brake pedal, a pressure transmitter on the tread of the brake pedal converts a pressure signal into an electric signal and transmits the electric signal to a controller, and the controller enables a motor to be in an out-of-operation state. When a driver steps on the brake pedal, the first return spring is stretched, the brake pedal arm swings downwards to drive the sliding rail locked with the brake pedal arm to move forwards, and the sliding rail further pushes the push rod to move forwards to brake the vehicle. After braking is finished, the brake pedal is released, the first return spring contracts, the sliding rail moves backwards and drives the push rod to move backwards under the action of elastic force, and the brake pedal arm resets. During automatic braking, the sensor on the brake pedal does not receive a pressure signal, and the controller controls the motor to be in a working state. When the vehicle detects that an obstacle appears in the front, the controller controls the motor to rotate forwards according to the signal, the rocker connected with the motor spindle (spline shaft) rotates along with the motor spindle, and then the brake plate is driven to rotate clockwise through the translation of the connecting rod. At the moment, the slide rail is kept still, the second return spring connected with the lifting ring on the hinged support is stretched, and the push rod moves forwards to realize the braking of the vehicle. After braking is finished, the controller controls the motor to be in a standby state, the second return spring contracts, the push rod moves backwards under the action of elastic force and drives the brake plate to move anticlockwise, then the rocker is driven to reset through the translation of the rocker, and the motor rotates back to the initial angle. The utility model discloses still have simple structure, convenient operation, easy advantage of implementing.
Compared with the prior art, the utility model discloses still have following advantage:
(1) the utility model provides a modified formula car brake mechanism's that unmanned formula racer brake mechanism's arrestment mechanism is compact: the bottom of the sliding rail is additionally provided with the pulley, and the sliding rail is matched with the sliding groove formed in the bottom of the frame to move, so that the sliding rail push rod can keep horizontal movement, and the situations of track deviation, mechanism shaking abnormal sound and the like in the braking process are avoided. Meanwhile, the motor and the frame are positioned on the same horizontal plane, so that the height of the mechanism is reduced, and the space is saved.
(2) The utility model provides a modified formula car brake mechanism that unmanned drives's braking orbit is accurate: the four-bar mechanism has rich motion curves, and the motion track can be changed by adjusting the length of the bar. The motor and the connecting rod are connected through a spline, and the motor has the characteristics of strong alignment property, high guidance quality and the like. Therefore, the braking track of the mechanism is accurate, and a scheme with the optimal braking performance is easy to find.
(3) The utility model provides a modified formula car brake mechanism that unmanned drives's braking response is timely: compared with the prior steel wire rope, the four-bar mechanism has strong rigidity, small deflection, small deformation in the braking process and timely braking response. Therefore, the improved scheme has certain guiding significance on the safety and the braking reliability of the racing car.
(4) The utility model provides a modified formula car brake mechanism of unmanned driving still has: 1. the design adopts a rigid rod with large bearing capacity, small deflection and strong reliability to replace a steel wire rope; 2. the motor spindle is connected with the rocker through a spline shaft, the motor rotates forwards to directly drive the rocker to rotate, so that the connecting rod is driven to translate, and the brake plate arm is driven to rotate by a corresponding angle, and the defects of untimely response and inaccurate track in the traditional winder are overcome; 3. 4 pulleys are additionally arranged at the bottom of the sliding rail and are matched with 2 sliding grooves formed in the frame to move, and the advantages that the mechanism deviation problem caused by the fact that the mechanism is not compact in the braking process is solved.
Drawings
Fig. 1 is a schematic structural diagram of an improved braking mechanism for formula racing drone provided by the present invention.
Fig. 2 is a front view of the improved formula racing drone brake mechanism provided by the present invention.
Fig. 3 is a top view of the improved formula racing drone brake mechanism provided by the present invention.
Fig. 4 is a left side view of the improved formula racing drone brake mechanism provided by the present invention.
Fig. 5 is a perspective view of an improved formula racing drone braking mechanism provided by the present invention.
The reference numerals in the above figures illustrate:
1-sliding rail, 2-push rod, 3-hinged support, 4-ring pin, 5-brake plate, 6-hinged support plate, 7-pin, 8-connecting rod, 9-rocker, 10-spline shaft, 11-motor, 12-cable, 13-controller, 14-pressure sensor, 15-non-slip pad, 16-brake pedal arm, 17-first reset spring, 18-second reset spring, 19-first lifting ring, 20-second lifting ring, 21-sliding groove, 22-pulley, 23-vehicle frame, 24-bolt and 25-bulge.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer and clearer, the present invention will be further described with reference to the accompanying drawings and examples.
Example 1:
as shown in fig. 1 to 5, the present embodiment discloses an improved formula racing car brake mechanism without man, which mainly comprises a bottom plate, a slide rail 1 mounted on the bottom plate, a push rod 2, a brake plate 5, a hinge support plate 6, a pin 7, a connecting rod 8, a rocker 9, a motor 11, a controller 13, a pressure sensor 14, a brake pedal arm, a pulley 22, a first return spring 17 for returning the slide rail 1 and a second return spring 18 for returning the brake plate 5.
Specifically, the bottom plate is fixedly mounted on the frame 23 through bolts 24, or is designed integrally with the frame 23; the slide rail 1 is arranged on the bottom plate, and pulleys 22 are arranged on two sides of the slide rail. The bottom plate is located the both sides of slide rail 1 and is equipped with spout 21, pulley 22 imbeds in spout 21, realizes that slide rail 1 slides on spout 21. One end of the push rod 2 is hinged with one end of the brake plate 5, and the other end of the push rod penetrates through the front end of the slide rail 1 from inside to outside and is connected with a brake execution component. The rear end of the slide rail 1 is hinged with a brake pedal arm. One end of the first reset spring 17 is connected with the slide rail 1, and the other end of the first reset spring is connected with the bottom plate to drive the slide rail 1 to restore to the original position. One end of the second return spring 18 is connected with the joint of the push rod 2 and the brake plate 5, and the other end of the second return spring is connected with the bottom plate to drive the push rod 2 and the brake plate 5 to return. One end of the hinge support plate 6 is hinged with the middle part of the brake plate 5, and the other end is hinged with one end of the brake pedal arm. And one end of the brake pedal arm is also provided with a bulge 25 for limiting the downward swinging amplitude of the hinge support plate 6. The bulge 25 is positioned below the hinge support plate 6 and is integrally designed with the brake pedal arm, so that the hinge support plate 6 swings downwards and is propped against the bulge 25 during automatic braking, and the joint of the hinge support plate 6 and the brake plate 5 serves as a rotating fulcrum. One end of the connecting rod 8 is hinged with the other end of the brake plate 5 through a pin 7, and the other end of the connecting rod is hinged with one end of a rocker 9. The other end of the rocker 9 is in transmission connection with a motor 11. The brake pedal is arranged at the other end of the brake pedal arm; the pressure sensor 14 is provided on the brake pedal. The controller 13 is fixed on the bottom plate and is electrically connected with the motor 11 and the pressure sensor 14 through cables 12.
Further, in order to improve the driving efficiency of the motor 11, the braking mechanism further includes a spline shaft 10 for transmission connection. One end of the spline shaft 10 is connected with an output shaft of the motor 11, and the other end of the spline shaft is connected with the other end of the rocker 9.
Specifically, the brake mechanism further comprises a hinged support 3 and a ring belt pin 4, wherein the hinged support 3 is used for realizing the hinging of the push rod 2 and the brake plate 5. The hinge support 3 is installed on one end of the push rod 2, and the band ring pin 4 penetrates through and connects the brake plate 5 and the hinge support 3. One end of the second return spring 18 is connected to the ring pin 4.
Further, in order to make first reset spring 17 and bottom and slide rail 1 be connected more firmly, reliably, arrestment mechanism still includes the first rings 19 that are used for connecting first reset spring 17. The first lifting rings 19 are respectively arranged on the sliding rail 1 and the bottom plate, and two ends of the first return spring 17 are respectively connected and fixed with the sliding rail 1 and the bottom plate through the first lifting rings 19.
Furthermore, in order to make the second return spring 18 and the bottom plate more firmly and reliably connected, the braking mechanism further comprises a second hanging ring 20 for connecting the second return spring 18. The second hanging ring 20 is arranged on the bottom plate, so that the other end of the second return spring 18 is fixedly connected with the bottom plate through the second hanging ring 20.
Furthermore, in order to reduce the sliding distance between the sole and the brake pedal and influence the braking effect during braking, the braking mechanism of the utility model also comprises an anti-skid mat 15; the anti-skid pad 15 is arranged on the brake pedal and fixedly connected with the brake pedal.
As the utility model discloses an optimal scheme, in order to improve the efficiency and the reliability that reset of brake pedal arm and braking plate 5, first reset spring 17 and second reset spring 18 all establish to the extension spring.
Further, in order to reduce the whole weight of arrestment mechanism, improve its performance, still be equipped with the fluting that is used for lightening on the brake pedal arm. The slot is located on a side of the brake pedal arm and extends from one side of the brake pedal arm to the other.
The utility model discloses a working process and principle are: the utility model provides a driving mode that arrestment mechanism can switch the car through a key switching button, automatic driving mode and manual driving mode promptly, under the general condition, a key switching button can set up in the position on for example steering wheel next door, make things convenient for the navigating mate to operate, when the vehicle switches to automatic driving mode, adopt the automatic braking mode, the barrier condition of detector real-time supervision vehicle front side on the unmanned vehicle, controller 13 receives the signal of detector, realize automatic braking when the barrier appears. When in use, the method mainly comprises two modes: when the vehicle is switched to the manual driving mode, the manual braking mode is adopted. Under the manual braking mode, the detector controls the motor 11 to be in the non-operating state, manual braking and automatic braking do not interfere with each other, and free switching can be realized. The specific operating method for the two braking modes is as follows: during manual braking, a driver steps on a brake pedal, a pressure transmitter on the tread of the brake pedal converts a pressure signal into an electric signal and transmits the electric signal to the controller 13, and the controller 13 enables the motor 11 to be in a non-working state. When a driver steps on the brake pedal, the first return spring 17 is stretched, the brake pedal arm swings downwards to drive the slide rail 1 locked with the brake pedal arm to move forwards, and the slide rail 1 further pushes the push rod 2 to move forwards, so that the vehicle is braked. After braking is finished, the brake pedal is released, the first return spring 17 contracts, the sliding rail 1 moves backwards and drives the push rod 2 to move backwards under the action of elastic force, and the brake pedal arm resets. During automatic braking, the controller 13 controls the motor 11 to be in an operating state because the sensor on the brake pedal does not receive the pressure signal. When the vehicle detects that an obstacle appears in the front, the controller 13 controls the motor 11 to rotate forwards according to the signal, the rocker 9 connected with the main shaft (spline shaft 10) of the motor 11 rotates along with the motor, and the connecting rod 8 translates to drive the brake plate 5 to rotate clockwise. At this time, the slide rail 1 is kept still, the second return spring 18 connected with the hanging ring on the hinged support 3 is stretched, and the push rod 2 moves forwards to realize the braking of the vehicle. After braking is finished, the controller 13 controls the motor 11 to be in a standby state, the second return spring 18 contracts, the push rod 2 moves backwards and drives the brake plate 5 to move anticlockwise under the action of elastic force, the rocker 9 is driven to reset through translation of the rocker 9, and the motor 11 rotates back to an initial angle. The utility model discloses still have simple structure, convenient operation, easy advantage of implementing.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
Claims (8)
1. The improved formula racing car brake mechanism without the driver is characterized by comprising a bottom plate, a sliding rail, a push rod, a brake plate, a hinge support plate, a pin, a connecting rod, a rocker, a motor, a controller, a pressure sensor, a brake pedal arm, a pulley, a first reset spring for resetting the sliding rail and a second reset spring for resetting the brake plate, wherein the sliding rail, the push rod, the brake plate, the hinge support plate, the pin, the connecting rod, the rocker, the motor, the controller, the pressure sensor, the;
the bottom plate is fixedly arranged on the frame through bolts or is integrally designed with the frame; the sliding rails are arranged on the bottom plate, and pulleys are arranged on two sides of the sliding rails; the bottom plate is provided with sliding grooves at two sides of the sliding rail, and the pulleys are embedded into the sliding grooves to realize the sliding of the sliding rail on the sliding grooves; one end of the push rod is hinged with one end of the brake plate, and the other end of the push rod penetrates through the front end of the slide rail from inside to outside and is connected with the brake execution component; the rear end of the sliding rail is hinged with the brake pedal arm; one end of the first return spring is connected with the slide rail, and the other end of the first return spring is connected with the bottom plate to drive the slide rail to restore to the original position; one end of the second reset spring is connected with the joint of the push rod and the brake plate, and the other end of the second reset spring is connected with the bottom plate to drive the push rod and the brake plate to reset; one end of the hinge support plate is hinged with the middle part of the brake plate, and the other end of the hinge support plate is hinged with one end of the brake pedal arm; a bulge used for limiting the downward swinging amplitude of the hinge support plate is further arranged at one end of the brake pedal arm; the bulge is positioned below the hinged support plate and integrally designed with the brake pedal arm, so that the hinged support plate swings downwards and is propped by the bulge when automatic braking is realized, and the joint of the hinged support plate and the brake plate becomes a rotating fulcrum; one end of the connecting rod is hinged with the other end of the brake plate through a pin, and the other end of the connecting rod is hinged with one end of the rocker; the other end of the rocker is in transmission connection with the motor; the brake pedal is arranged at the other end of the brake pedal arm; the pressure sensor is arranged on the brake pedal; the controller is fixed on the bottom plate and is electrically connected with the motor and the pressure sensor respectively.
2. The improved formula racing drone brake mechanism of claim 1, further comprising a splined shaft for drive connection; one end of the spline shaft is connected with the output shaft of the motor, and the other end of the spline shaft is connected with the other end of the rocker.
3. The improved formula racing brake mechanism of claim 1, further comprising a hinge support and a band pin for effecting articulation of the push rod with the brake plate; the hinged support is arranged at one end of the push rod, and the pin with the ring penetrates through the brake plate and the hinged support and connects the brake plate and the hinged support; one end of the second return spring is connected to the pin with the ring.
4. The improved formula racing drone brake mechanism of claim 1, further comprising a first bail for connection to a first return spring; the first lifting rings are respectively arranged on the sliding rail and the bottom plate, and two ends of the first reset spring are respectively connected and fixed with the sliding rail and the bottom plate through the first lifting rings.
5. The improved formula racing drone brake mechanism of claim 1, further comprising a second bail for connection to a second return spring; the second lifting ring is arranged on the bottom plate, so that the other end of the second reset spring is fixedly connected with the bottom plate through the second lifting ring.
6. The improved formula racing drone brake mechanism of claim 1, further comprising a non-slip mat for non-slip; the non-slip mat is arranged on the brake pedal and fixedly connected with the brake pedal.
7. The improved formula racing brake mechanism of claim 1, wherein the first return spring and the second return spring are each provided as tension springs.
8. The improved formula racing brake mechanism of claim 1, wherein the brake pedal arm is further provided with a slot for weight reduction; the slot is located on a side of the brake pedal arm and extends from one side of the brake pedal arm to the other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920587483.8U CN210101603U (en) | 2019-04-26 | 2019-04-26 | Improved formula racing car brake mechanism without driver's driving |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920587483.8U CN210101603U (en) | 2019-04-26 | 2019-04-26 | Improved formula racing car brake mechanism without driver's driving |
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| Publication Number | Publication Date |
|---|---|
| CN210101603U true CN210101603U (en) | 2020-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920587483.8U Expired - Fee Related CN210101603U (en) | 2019-04-26 | 2019-04-26 | Improved formula racing car brake mechanism without driver's driving |
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| Country | Link |
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| CN (1) | CN210101603U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110228451A (en) * | 2019-04-26 | 2019-09-13 | 广东工业大学 | A kind of improved unmanned equation motorcycle race arrestment mechanism |
| CN111452768A (en) * | 2020-04-13 | 2020-07-28 | 汪长莲 | Interlocking fast brake device for automobile |
-
2019
- 2019-04-26 CN CN201920587483.8U patent/CN210101603U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110228451A (en) * | 2019-04-26 | 2019-09-13 | 广东工业大学 | A kind of improved unmanned equation motorcycle race arrestment mechanism |
| CN110228451B (en) * | 2019-04-26 | 2024-04-26 | 广东工业大学 | Improved braking mechanism for formula car of unmanned aerial vehicle |
| CN111452768A (en) * | 2020-04-13 | 2020-07-28 | 汪长莲 | Interlocking fast brake device for automobile |
| CN111452768B (en) * | 2020-04-13 | 2021-04-13 | 吴盼婷 | Automobile interlocking brake device |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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| CF01 | Termination of patent right due to non-payment of annual fee |