Vehicle parking device and vehicle
By cooperating with the parking cam and pawl drive, and optimizing the outer contour design, the noise problem of the electronic parking brake system has been solved, resulting in noise reduction and improved component life, thus ensuring the durability and reliability of the parking device.
Patent Information
- Application Number
- CN202511648146.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2025-12-26
AI Technical Summary
When existing electronic parking brake systems are in operation, mechanical collisions can easily generate significant noise, affecting the driving experience. Existing software control strategies are insufficient to fundamentally eliminate the noise problem.
The parking cam is driven by a parking pawl. The outer contour of the parking cam push stroke is a sinusoidal acceleration curve, replacing the traditional electromagnetic lock impact structure. The outer contours of the push stroke and return stroke are optimized to reduce impact noise. The parking cam is driven to rotate in one direction by the output shaft of the parking motor to achieve smooth locking and unlocking.
It effectively reduces the impact noise when the parking pawl contacts the parking ratchet, buffers the impact force, improves the life of parts, enhances the durability and reliability of the system, and ensures parking safety.
Smart Images
Figure CN121201002A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of vehicle parking technology, and more particularly to a vehicle parking device and a vehicle. Background Technology
[0002] With the development of automotive electronics and intelligence, Electronic Parking Brake (EPB) systems have been widely used. However, during operation, the mechanical collisions of the EPB's actuators easily generate significant noise, especially during the static parking and release processes, which severely impacts the driving experience. Current technologies primarily focus on suppressing noise through software control strategies, but this cannot fundamentally eliminate noise problems caused by inherent defects in the mechanical structure. Summary of the Invention
[0003] This application provides a vehicle parking device and a vehicle, which can minimize the noise generated during the operation of the vehicle parking device.
[0004] To achieve the above objectives, according to a first aspect of this application, a vehicle parking device is provided. The vehicle parking device includes a brake motor output shaft. The vehicle parking device also includes a parking ratchet, which is kinetically connected to the brake motor output shaft. The vehicle parking device further includes a parking pawl, which is movably disposed. The vehicle parking device also includes a parking cam, which is kinetically engaged with the parking pawl. The parking cam includes a push-stroke portion, the outer contour of which is a sinusoidal acceleration curve; as the parking cam rotates, the push-stroke portion drives the parking pawl to move towards the parking ratchet, causing the parking pawl to engage with the parking ratchet to restrict the rotation of the parking ratchet.
[0005] Optionally, the parking cam also includes a return section, and the return section and the push section are distributed circumferentially along the parking cam; as the parking cam rotates, the return section is configured to allow the parking pawl to move away from the parking ratchet; wherein the outer contour of the return section is a sinusoidal acceleration curve.
[0006] Optionally, the outer contour lines of both the push stroke section and the return stroke section protrude in a direction away from the center of the base circle of the parking cam; the two ends of the outer contour line of the push stroke section and the center of the base circle of the parking cam form a first angle θ1, and the two ends of the outer contour line of the return stroke section and the center of the base circle of the parking cam form a second angle θ2, satisfying: θ1>θ2.
[0007] Optionally, the parking cam further includes a first stop portion and a second stop portion, wherein the first stop portion, the push portion, the second stop portion and the return portion are distributed sequentially along the circumference of the parking cam; the outer contour lines of the first stop portion and the second stop portion are both arcs.
[0008] Optionally, the parking pawl includes a pawl body and a drive boss disposed on the pawl body, the drive boss contacting the parking cam; wherein, the base circle radius of the parking cam is R, the maximum stroke of the drive boss in the radial direction of the parking cam is L, and the outer contour radius of the first stop part is R1, satisfying: R1=R+L.
[0009] Optionally, the base circle radius of the parking cam is R, and the outer contour radius of the second stop part is R2, satisfying: R2=R.
[0010] Optionally, the vehicle parking device also includes a parking motor output shaft that is connected to the parking cam drive. The parking motor output shaft is used to drive the parking cam to rotate in one direction, so that the parking pawl sequentially engages with the first stop part, the push part, the second stop part, and the return part.
[0011] Optionally, the vehicle parking device also includes a pawl shaft. The parking pawl includes a pawl body and a drive boss disposed on the pawl body. The pawl body is rotatably disposed via the pawl shaft. The drive boss contacts the parking cam. The push stroke part drives the parking pawl to move toward the parking ratchet via the drive boss.
[0012] Optionally, the vehicle parking device also includes an elastic element connected to the pawl body, which drives the pawl body to rotate away from the parking ratchet.
[0013] According to a second aspect of this application, a vehicle is provided. The vehicle includes a vehicle parking device as described in the embodiments above.
[0014] The vehicle parking device of this application embodiment uses a parking cam and a parking pawl in a transmission engagement to engage the parking pawl with the parking ratchet, thereby limiting the rotation of the parking ratchet and consequently limiting the rotation of the brake motor output shaft, thus achieving vehicle parking. This method of engagement between the parking cam and parking pawl replaces the traditional electromagnetic lock impact structure, reducing the impact noise generated when the parking pawl and parking ratchet contact each other. Furthermore, in this application embodiment, the outer contour of the push stroke portion of the parking cam is a sinusoidal acceleration curve. By optimizing the outer contour of the push stroke portion, the impact noise generated when the parking pawl and parking ratchet contact each other is further reduced. Therefore, the noise generated during the operation of the vehicle parking device can be minimized, and the impact force between the parking pawl and parking ratchet during contact can be buffered, improving the service life of components such as the parking pawl and parking ratchet, and significantly improving the durability and reliability of the entire vehicle parking device system.
[0015] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.
[0018] Figure 1 This is a schematic diagram of the structure of an embodiment of the vehicle parking device of this application; Figure 2 yes Figure 1 A schematic diagram of the vehicle parking device from another perspective. Figure 3 This is a schematic diagram of the structure of one embodiment of the parking cam of this application; Figure 4 yes Figure 1 A schematic diagram of another state of the vehicle parking device shown. Figure 5 This is a diagram showing the relationship between the rotation angle of the parking cam and the travel of the contact point between the parking cam and the drive boss in this application. Figure 6 This is a diagram showing the relationship between the rotation angle of the parking cam and the speed of the contact point between the parking cam and the drive boss.
[0019] Explanation of reference numerals in the attached figures: 10-Brake motor output shaft; 20-Parking ratchet; 30-Parking pawl; 31-Pawl body; 32-Drive boss; 40-Parking cam; 41-Push stroke part; 42-Return stroke part; 43-First stop part; 44-Second stop part; 50-Parking motor output shaft; 60-Pawl shaft; 70-Elastic element. Detailed Implementation
[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.
[0021] To address the significant noise issue in existing electronic parking brake systems, one embodiment of this application provides a vehicle parking device. The vehicle parking device includes a brake motor output shaft. It also includes a parking ratchet, which is kinetically connected to the brake motor output shaft. Furthermore, it includes a parking pawl, which is movably mounted. Finally, it includes a parking cam, which engages with the parking pawl. The parking cam includes a push-stroke portion, the outer contour of which is a sinusoidal acceleration curve. As the parking cam rotates, the push-stroke portion drives the parking pawl towards the parking ratchet, causing the pawl to engage with the ratchet to restrict its rotation. This will be described in detail below.
[0022] Please see Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of a structural embodiment of the vehicle parking device of this application. Figure 2 yes Figure 1 The diagram shows a structural schematic of the vehicle parking device from another perspective.
[0023] In one embodiment, the vehicle includes a vehicle parking device for parking the vehicle. This embodiment provides a novel vehicle parking device, distinct from traditional electronic parking brake systems. Specifically, the vehicle parking device includes a brake motor output shaft 10, which is the output shaft of a brake motor. By restricting the rotation of the brake motor output shaft 10, the vehicle parking function is achieved. The vehicle parking device also includes a parking ratchet 20, which is kinetically connected to the brake motor output shaft 10, meaning the parking ratchet 20 and the brake motor output shaft 10 can rotate synchronously. The vehicle parking device also includes a parking pawl 30, which is movably configured. The vehicle parking device also includes a parking cam 40, which is kinetically engaged with the parking pawl 30.
[0024] In this embodiment, the parking cam 40 and parking pawl 30 engage to lock the parking ratchet 20, thus limiting the rotation of the parking ratchet 20 and consequently limiting the rotation of the brake motor output shaft 10, thereby parking the vehicle. This method of engagement between the parking cam 40 and parking pawl 30 replaces the traditional electromagnetic lock impact structure, reducing the impact noise generated when the parking pawl 30 contacts the parking ratchet 20 and buffering the impact force during contact. This improves the service life of components such as the parking pawl 30 and parking ratchet 20, significantly enhancing the durability and reliability of the entire vehicle parking device system.
[0025] It should be noted that the engagement between the parking pawl 30 and the parking ratchet 20 can be specifically manifested as follows: the parking ratchet 20 has multiple meshing teeth arranged in the circumferential direction, the end shape of the parking pawl 30 is adapted to the shape of the tooth groove between adjacent meshing teeth on the parking ratchet 20, and the end of the parking pawl 30 is embedded in the tooth groove on the parking ratchet 20 to achieve engagement and locking.
[0026] Please refer to the following: Figure 3 , Figure 3 This is a schematic diagram of the structure of one embodiment of the parking cam of this application.
[0027] In one embodiment, the parking cam 40 includes a push-stroke portion 41, the outer contour of which is a sinusoidal acceleration curve. As the parking cam 40 rotates, the push-stroke portion 41 drives the parking pawl 30 to move toward the parking ratchet 20, causing the parking pawl 30 to engage with the parking ratchet 20 to restrict the rotation of the parking ratchet 20. This embodiment further reduces the impact noise generated when the parking pawl 30 contacts the parking ratchet 20 by optimizing the outer contour of the push-stroke portion 41. Therefore, it can eliminate the noise generated during the operation of the vehicle parking device as much as possible, and further buffer the impact force between the parking pawl 30 and the parking ratchet 20 during contact, improve the service life of components such as the parking pawl 30 and the parking ratchet 20, and thus significantly improve the durability and reliability of the entire vehicle parking device system.
[0028] In one embodiment, the parking cam 40 further includes a return section 42, and the return section 42 and the push section 41 are distributed circumferentially along the parking cam 40. As the parking cam 40 rotates, the return section 42 is configured to allow the parking pawl 30 to move away from the parking ratchet 20. When it is necessary to release the parking state of the vehicle, as the parking cam 40 rotates, the return section 42 engages with the parking pawl 30, allowing the parking pawl 30 to move away from the parking ratchet 20, thereby disengaging the parking pawl 30 from the parking ratchet 20 and releasing the restriction on the rotation of the brake motor output shaft 10.
[0029] In this embodiment, the outer contour of the return section 42 is a sinusoidal acceleration curve. By optimizing the outer contour of the return section 42, the connection between the outer contour of the return section 42 and the outer contour of other parts of the parking cam 40 is smoother, further reducing the noise generated during the operation of the vehicle parking device. Furthermore, when it is necessary to release the vehicle from the parking state, the design of the outer contour of the return section 42 allows for a smoother transmission engagement with the parking pawl 30, further reducing the noise generated during the operation of the vehicle parking device.
[0030] In one embodiment, the outer contour lines of both the push stroke portion 41 and the return stroke portion 42 protrude in a direction away from the center O of the base circle of the parking cam 40. The two endpoints of the outer contour line of the push stroke portion 41 form a first angle θ1 with the line connecting the two endpoints of the outer contour line of the push stroke portion 41 to the center O of the base circle of the parking cam 40, and the two endpoints of the outer contour line of the return stroke portion 42 form a second angle θ2 with the line connecting the two endpoints of the outer contour line of the return stroke portion 42 to the center O of the base circle of the parking cam 40, satisfying: θ1>θ2.
[0031] In other words, the first angle corresponding to the push stroke 41 in this embodiment is relatively large, which means that during the transmission engagement between the push stroke 41 and the parking pawl 30, the parking cam 40 needs to rotate a larger angle so that the parking pawl 30 engages with the parking ratchet 20. This can further ensure that the transmission engagement between the push stroke 41 and the parking pawl 30 is more stable, further reduce the impact noise generated when the parking pawl 30 contacts the parking ratchet 20, and thus eliminate the noise generated during the operation of the vehicle parking device as much as possible.
[0032] In one embodiment, the parking cam 40 further includes a first stop portion 43 and a second stop portion 44, wherein the first stop portion 43, the push portion 41, the second stop portion 44, and the return portion 42 are sequentially distributed along the circumference of the parking cam 40. The vehicle parking device also includes a parking motor output shaft 50 that is pulsatically connected to the parking cam 40. The parking motor output shaft 50 is used to drive the parking cam 40 to rotate unidirectionally, so that the parking pawl 30 sequentially engages with the first stop portion 43, the push portion 41, the second stop portion 44, and the return portion 42.
[0033] like Figure 1 As shown, when a parking command is received, the parking motor output shaft 50 drives the parking cam 40 to rotate, causing the contact point between the parking cam 40 and the parking pawl 30 to move from any point on the second stop part 44 through the push part 41 to any point on the first stop part 43. During this process, the parking cam 40 pushes the parking pawl 30 to smoothly lock with the parking ratchet 20, achieving mechanical locking of the brake motor output shaft 10. After the vehicle braking is completed, the vehicle parking device of this embodiment locks the brake motor output shaft 10 to prevent it from rotating in the opposite direction, thereby maintaining braking force and ensuring parking safety.
[0034] like Figure 4As shown, when it is necessary to release the vehicle's parking state, the parking motor output shaft 50 drives the parking cam 40 to rotate, causing the contact point between the parking cam 40 and the parking pawl 30 to move from any point on the first stop part 43 through the return part 42 to any point on the second stop part 44, allowing the parking pawl 30 to separate from the parking ratchet 20 and releasing the lock on the brake motor output shaft 10. Subsequently, the brake motor output shaft 10 rotates in the opposite direction, causing the brake pads to reset and the parking state to be released. In this embodiment, the parking motor output shaft 50 drives the parking cam 40 to rotate, converting the rotational motion of the parking cam 40 into the controllable motion of the parking pawl 30, thereby smoothly driving the parking pawl 30 to lock or separate from the parking ratchet 20, realizing the maintenance and release of parking braking force, reducing the impact noise generated when the parking pawl 30 contacts the parking ratchet 20, and minimizing the noise generated during the operation of the vehicle parking device.
[0035] It should be noted that the outer contour lines of both the first stop portion 43 and the second stop portion 44 are arcs. In this way, the parking cam 40 and the parking pawl 30 can maintain the same position of the parking pawl 30 at any point on the first stop portion 43, thus stably keeping the parking pawl 30 engaged and locked with the parking ratchet 20. Similarly, the parking cam 40 and the parking pawl 30 can maintain the same position of the parking pawl 30 at any point on the second stop portion 44, thus stably keeping the parking pawl 30 separated from the parking ratchet 20.
[0036] In one embodiment, the vehicle parking device further includes a pawl shaft 60. The parking pawl 30 includes a pawl body 31 and a drive boss 32 disposed on the pawl body 31. Specifically, the drive boss 32 may be located on one side of the pawl body 31 along the axial direction of the pawl shaft 60. The pawl body 31 is used to engage with the parking ratchet 20 to restrict the rotation of the parking ratchet 20. The pawl body 31 is rotatably disposed via the pawl shaft 60, and the drive boss 32 contacts the parking cam 40. The parking cam 40 drives the parking pawl 30 toward the parking ratchet 20 through a transmission engagement with the drive boss 32, thereby restricting the rotation of the parking ratchet 20. Specifically, the push stroke portion 41 drives the parking pawl 30 toward the parking ratchet 20 through the drive boss 32.
[0037] like Figure 2As shown, the vehicle parking device also includes an elastic element 70, which is connected to the pawl body 31. The elastic element 70 is used to drive the pawl body 31 to rotate away from the parking ratchet 20. For example, the elastic element 70 can be a torsion spring, etc. The elastic element 70 is sleeved on the outer periphery of the pawl shaft 60. The elastic element 70 drives the pawl body 31 to rotate away from the parking ratchet 20, so that the drive boss 32 remains in contact with the parking cam 40. When a parking command is received, the contact point between the drive boss 32 and the parking cam 40 moves from any point on the second stop part 44 through the push part 41 to any point on the first stop part 43. During this process, the parking cam 40 pushes the parking pawl 30 to smoothly lock with the parking ratchet 20, thereby achieving mechanical locking of the brake motor output shaft 10. When it is necessary to release the vehicle's parking state, the contact point between the drive boss 32 and the parking cam 40 moves from any point on the first stop part 43 through the return part 42 to any point on the second stop part 44, allowing the parking pawl 30 to separate from the parking ratchet 20 and releasing the lock on the brake motor output shaft 10. Subsequently, the brake motor output shaft 10 rotates in the opposite direction, causing the brake pads to reset and the parking state to be released.
[0038] In one embodiment, the base circle radius of the parking cam 40 is R, the maximum radial travel of the drive boss 32 on the parking cam 40 is L, and the outer contour radius of the first stop portion 43 is R1, satisfying: R1 = R + L. Thus, by reasonably setting the outer contour radius of the first stop portion 43, this embodiment ensures that when the contact point between the drive boss 32 and the parking cam 40 moves from the second stop portion 44 to the first stop portion 43, the parking cam 40 drive pawl body 31 engages with the parking ratchet 20 to restrict the rotation of the parking ratchet 20.
[0039] In one embodiment, the outer contour radius of the second stop portion 44 is R2, satisfying: R2=R. Thus, by reasonably setting the outer contour radius of the second stop portion 44, this embodiment ensures that when the contact point between the drive boss 32 and the parking cam 40 moves from the first stop portion 43 to the second stop portion 44, the pawl body 31 separates from the parking ratchet 20, releasing the lock on the brake motor output shaft 10.
[0040] The working process of the vehicle parking device according to the embodiments of this application is described below: like Figure 1As shown, when a parking command is received, the parking motor output shaft 50 drives the parking cam 40 to rotate, causing the contact point between the parking cam 40 and the drive boss 32 of the parking pawl 30 to move from point A through the push stroke 41 to any point on the first stop 43. During this process, the parking cam 40 pushes the parking pawl 30 to rotate around the pawl shaft 60, causing the end of the parking pawl 30 to engage with the tooth groove of the parking ratchet 20. The parking cam 40 pushes the parking pawl 30 and the parking ratchet 20 to lock smoothly, achieving mechanical locking of the brake motor output shaft 10. After the vehicle braking is completed, the vehicle parking device of this embodiment locks the brake motor output shaft 10 to prevent it from rotating in the opposite direction, thereby maintaining braking force and ensuring parking safety. Figure 4 As shown, when the vehicle needs to be released from parking, the parking motor operates, and the parking motor output shaft 50 drives the parking cam 40 to rotate. This causes the contact point between the parking cam 40 and the drive boss 32 to move from any point on the first stop part 43 through the return part 42 to point A. The parking pawl 30 rotates around the pawl shaft 60, and the end of the parking pawl 30 separates from the tooth groove of the parking ratchet 20 and resets under the action of the elastic member 70, releasing the lock on the brake motor output shaft 10. Subsequently, the brake motor output shaft 10 rotates in the opposite direction, causing the brake pads to reset, and the parking state is released.
[0041] Figure 5 The relationship between the rotation angle of the parking cam 40 and the travel of the contact point between the parking cam 40 and the drive boss 32 is shown. Figure 6 The diagram illustrates the relationship between the rotation angle of the parking cam 40 and the speed of the contact point between the parking cam 40 and the drive boss 32. Specifically, point A is the intersection of the outer contour line of the push-stroke section 41 and the outer contour line of the second stop section 44; point B is the intersection of the outer contour line of the push-stroke section 41 and the outer contour line of the first stop section 43; point C is the intersection of the outer contour line of the first stop section 43 and the outer contour line of the return section 42; and point D is the intersection of the outer contour line of the return section 42 and the outer contour line of the second stop section 44.
[0042] This embodiment utilizes the parking motor output shaft 50 to drive the parking cam 40 to rotate, converting the rotational motion of the parking cam 40 into a controllable swing of the parking pawl 30. This smoothly pushes the parking pawl 30 to lock or disengage from the parking ratchet 20, achieving the maintenance and release of parking braking force, reducing the impact noise generated when the parking pawl 30 contacts the parking ratchet 20, and minimizing the noise generated during the operation of the vehicle parking device. This embodiment uses a cam mechanism (including the parking cam 40, etc.) to drive the parking pawl 30, replacing the original electromagnetic lock's direct impact release method. Through the optimized design of the parking cam 40's contour, the stroke and speed of the parking pawl 30 can be controlled, buffering the impact force during its contact with the parking ratchet 20 and minimizing impact noise. This embodiment allows for customization of the motion curve of the parking pawl 30 according to requirements. By controlling the rotation of the parking motor output shaft 50 and optimizing the contour design of the parking cam 40, the real-time and end-point positions of the parking pawl 30 can be precisely controlled, solving the problem that the original solution could not achieve full-stroke motion control of the parking pawl 30. This embodiment minimizes the mechanical impact caused by the instantaneous strong collision between the parking ratchet 20 and the parking pawl 30, resulting in a smoother stress distribution on key components such as the parking ratchet 20 and the parking pawl 30, effectively reducing component damage and thus improving the durability and reliability of the entire actuator.
[0043] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0044] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0045] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.
[0046] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.
Claims
1. A vehicle parking device, characterized in that, include: Brake motor output shaft; The parking ratchet is connected to the output shaft of the brake motor. Parking pawl, adjustable; as well as The parking cam engages with the parking pawl drive. The parking cam includes a push-stroke section, and the outer contour of the push-stroke section is a sinusoidal acceleration curve. As the parking cam rotates, the push stroke section drives the parking pawl to move toward the parking ratchet, so that the parking pawl engages with the parking ratchet to restrict the rotation of the parking ratchet.
2. The vehicle parking device according to claim 1, characterized in that, The parking cam further includes a return section, and the return section and the push section are distributed circumferentially along the parking cam; as the parking cam rotates, the return section is configured to allow the parking pawl to move away from the parking ratchet. The outer contour of the return section is a sinusoidal acceleration curve.
3. The vehicle parking device according to claim 2, characterized in that, The outer contour lines of both the push-stroke section and the return section protrude in a direction away from the center of the base circle of the parking cam; the two ends of the outer contour line of the push-stroke section and the center of the base circle of the parking cam form a first angle θ1, and the two ends of the outer contour line of the return section and the center of the base circle of the parking cam form a second angle θ2, satisfying: θ1>θ2.
4. The vehicle parking device according to claim 2, characterized in that, The parking cam further includes a first stop portion and a second stop portion, wherein the first stop portion, the push portion, the second stop portion and the return portion are distributed sequentially along the circumference of the parking cam; the outer contour lines of the first stop portion and the second stop portion are both arcs.
5. The vehicle parking device according to claim 4, characterized in that, The parking pawl includes a pawl body and a drive boss disposed on the pawl body, the drive boss being in contact with the parking cam; Wherein, the base circle radius of the parking cam is R, the maximum travel of the drive boss in the radial direction of the parking cam is L, and the outer contour radius of the first stop part is R1, satisfying: R1=R+L.
6. The vehicle parking device according to claim 4, characterized in that, The base circle radius of the parking cam is R, and the outer contour radius of the second stop part is R2, satisfying: R2=R.
7. The vehicle parking device according to claim 4, characterized in that, The vehicle parking device also includes a parking motor output shaft that is connected to the parking cam drive. The parking motor output shaft is used to drive the parking cam to rotate in one direction, so that the parking pawl sequentially engages with the first stop part, the push part, the second stop part, and the return part.
8. The vehicle parking device according to claim 1, characterized in that, The vehicle parking device also includes a pawl shaft. The parking pawl includes a pawl body and a drive boss disposed on the pawl body. The pawl body is rotatably disposed via the pawl shaft. The drive boss contacts the parking cam. The push stroke part drives the parking pawl to move toward the parking ratchet via the drive boss.
9. The vehicle parking device according to claim 8, characterized in that, The vehicle parking device also includes an elastic element connected to the pawl body, which drives the pawl body to rotate away from the parking ratchet.
10. A vehicle, characterized in that, Includes a vehicle parking device as described in any one of claims 1 to 9.