Parking mechanism and vehicle

Abstract

The invention relates to the technical field of vehicles, in particular to a parking mechanism and a vehicle. The embodiment of the invention provides a parking mechanism which comprises a ratchet wheel, a stop piece, a swing piece and a pawl, and the ratchet wheel is connected with a driving shaft of a first motor; the stop piece is fixed to the vehicle body and surrounds the ratchet wheel in the circumferential direction of the ratchet wheel. The swing part sleeves a driving shaft of the first motor and can rotate relative to the driving shaft of the first motor; the pawl is arranged on the swing part and can move relative to the swing part in the radial direction of the ratchet wheel, so that the pawl falls off or is matched with the ratchet wheel; the pawl is provided with a first side face in the circumferential direction of the ratchet wheel, and the stop piece is suitable for being matched with the first side face so that the pawl can be separated from the ratchet wheel. Impact and noise when the pawl is separated from or meshed with the ratchet wheel can be reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, and more particularly to a parking mechanism and a vehicle. Background Technology

[0002] The parking brake is a crucial safety feature for vehicles. Traditional cars typically achieve parking through two methods. One is a mechanical handbrake in the driver's cab connected to the rear wheel drum brakes via a cable. The handbrake force is transmitted to the wheel ends, causing the brake pads to open and generating parking braking force. The other method is based on rear wheel caliper brakes equipped with an EPB (Electronic Parking Brake). The driver uses a parking button inside the vehicle to transmit a parking signal to the EPB unit at the wheel end via the vehicle's wiring harness. The EPB motor drives a transmission mechanism to generate force that pushes the friction pads to clamp. Once the required parking clamping force is reached, the transmission mechanism self-locks, maintaining the clamping force and achieving the parking purpose.

[0003] With the increasing demand for chassis drive-by-wire systems, electromechanical braking (EMB) technology is a future trend. Its parking structure typically employs two solutions: one is similar to EPB, adding a parking brake structure to the existing service brake transmission mechanism; however, this solution is more expensive and the brake itself is larger. The other solution involves designing a locking mechanism to lock the transmission mechanism and maintain clamping force to achieve parking. The locking mechanism mainly uses a pawl and ratchet engagement scheme, but the impact when the pawl disengages from the ratchet is significant, resulting in considerable noise. Summary of the Invention

[0004] This application provides a parking mechanism and vehicle that can reduce the impact and noise when the pawl disengages from or engages with the ratchet.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include: In a first aspect, embodiments of this application provide a parking mechanism, including a ratchet, a stop, a swing member, and a pawl. The ratchet is connected to the drive shaft of a first motor; the stop is fixed to the vehicle body, and a portion of the stop surrounds the ratchet along its circumference; the swing member is sleeved on the drive shaft of the first motor and is rotatable relative to the drive shaft; the pawl is disposed on the swing member, and along the radial direction of the ratchet, the pawl is movable relative to the swing member to disengage from or engage with the ratchet; wherein, along the circumference of the ratchet, the pawl has a first side surface, and the stop is adapted to engage with the first side surface to disengage the pawl from the ratchet.

[0006] In this application, when the vehicle needs to remain parked, the swing member drives the pawl to rotate, and the first side of the pawl moves along the stop member toward the ratchet so that the ratchet and the pawl engage. The stop member provides a buffer for the movement of the pawl toward the ratchet, thereby reducing the impact of the pawl on the ratchet. When the vehicle needs to be released from the parking state, the swing member drives the pawl to rotate, and the first side of the pawl abuts against the stop member. The stop member presses the pawl to move away from the ratchet relative to the swing member, so that the pawl can disengage from the ratchet. The stop member provides assistance for the movement of the pawl toward or away from the ratchet, making it easier for the pawl to disengage from the ratchet.

[0007] Optionally, the first side surface is constructed as a curved surface that is concave towards its own interior.

[0008] In the above embodiment, the first side slides along the surface of the stop member, and the contact position between the pawl and the stop member changes continuously, so that the wear between the pawl and the stop member is evenly distributed. At the same time, the stop member pushes the pawl away from the ratchet, making the action of the pawl disengaging from the ratchet more smooth and improving reliability.

[0009] Optionally, the stop includes a connected body portion and a guide portion, the guide portion being adapted to engage with the first side surface, and the guide portion gradually decreasing in size along the radial direction of the ratchet from the body portion to the guide portion.

[0010] In the above embodiment, the side of the guide portion away from the main body is thinned to guide the movement of the pawl. When parking is required, the guide portion guides the pawl, making the contact between the first side and the guide portion smoother and reducing the impact and noise during the engagement of the pawl and the ratchet. When parking is required, the first side of the pawl slides along the surface of the guide portion to achieve smooth radial movement.

[0011] Optionally, along the radial direction of the ratchet, the guide portion has a second side surface away from the ratchet, the second side surface being constructed as an arc surface.

[0012] In the above embodiment, the second side cooperates with the first side, and the second side of the guide provides guidance for the movement of the pawl, making the movement of the pawl more stable, smooth and continuous, and reducing wear and abnormal noise of the pawl and the guide.

[0013] Optionally, the body portion has a third side surface away from the ratchet, the third side surface being constructed as an arc surface, the curvature of the third side surface being less than the curvature of the second side surface.

[0014] In the above embodiments, the second side with a larger curvature provides smooth guidance for the movement of the pawl, reducing impact or jamming, while the third side with a smaller curvature has a smoother surface and higher load-bearing capacity, which increases the contact area between the pawl and the third side, reduces contact stress, and improves the life of the stop.

[0015] Optionally, the pawl includes a main body and an engaging part. The main body is movably disposed on the swing member, and an abutment part is protruding from the outer peripheral surface of the main body. The parking mechanism includes an elastic member, which is sleeved on the main body and, along the axial direction of the elastic member, abuts the swing member at one end and the abutment part at the other end.

[0016] In the above embodiments, when it is necessary to maintain the parking state, the elastic element can be used to press the engaging part towards the ratchet to engage with the ratchet. That is, under the action of elastic force, the elastic element drives the pawl to move towards the ratchet and presses the engaging part into the groove between two adjacent ratchet teeth on the ratchet, which can reduce the probability of the ratchet and pawl failing to engage. When the parking state is released, the elastic element presses the pawl against the main body.

[0017] Optionally, the swing member is provided with a first hole extending radially along the ratchet, the main body is movably disposed in the first hole, and one end of the elastic member abuts against the bottom wall of the first hole.

[0018] In the above embodiment, one end of the elastic member abuts against the bottom wall of the first hole, and the other end abuts against the abutting part of the pawl. In the parking state, the elastic member provides elastic force to move the pawl toward the ratchet and presses the pawl against the ratchet to keep it in the meshing state. When the parking state is released, the elastic member presses the pawl against the stop member.

[0019] Optionally, the swing member is further provided with a second hole, which extends radially along the ratchet and penetrates the bottom wall of the first hole; the pawl also includes a limiting part and a connecting part, the connecting part passing through the second hole and being detachably connected to the main body, the limiting part being connected to the end of the connecting part away from the main body, and the outer diameter of the limiting part being larger than the diameter of the second hole.

[0020] In the above embodiment, the connecting part is connected to the end of the main body that is away from the meshing part, and the outer diameter of the limiting part is larger than the diameter of the second hole to reduce the risk of the pawl falling out of the first hole.

[0021] Optionally, the parking mechanism further includes a second motor, a first link, and a second link. One end of the first link is connected to the drive shaft of the second motor, the other end of the first link is hinged to one end of the second link, and the other end of the second link is hinged to the swing member.

[0022] In the above embodiment, the rotational motion of the second motor drives the first link to rotate, the first link drives the second link to swing, the second link drives the swinging component to rotate, and the swinging component drives the pawl to maintain the parking state or release the parking state under the action of the elastic component.

[0023] Secondly, embodiments of this application provide a vehicle including the parking mechanism described in any of the above embodiments.

[0024] The vehicle in this application includes the parking mechanism described in any of the above embodiments and has the beneficial effects of the parking mechanism described in any of the above embodiments. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the parking mechanism in one embodiment of this application, wherein the pawl and the ratchet are in a separated state; Figure 2 This is a front view of the parking mechanism in one embodiment of this application; Figure 3 for Figure 2 Cross-sectional view of section AA; Figure 4 This is a schematic diagram of the parking mechanism in one embodiment of this application, wherein the pawl and the ratchet are in an engaged state.

[0027] [Explanation of Labels in the Attached Image] 1. Ratchet; 2. The drive shaft of the first motor; 3. Stop; 31. Body part; 311. Third side surface; 312. Groove; 32. Guide part; 321. Second side surface; 4. Swinging component; 41. First hole; 42. Second hole; 43. Third hole; 5. Pawl; 51. First side surface; 52. Main body; 53. Engaging part; 54. Abutting part; 55. Limiting part; 56. Connecting part; 6. Elastic components; 7. Second motor; 8. First connecting rod; 9. Second connecting rod; 10. Bearing; 11. First retaining ring; 12. First pin; 13. Third retaining ring. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, 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 some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0030] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0031] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0032] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0033] In this application, "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0034] Currently, the locking mechanism mainly adopts a pawl and ratchet engagement scheme. However, the impact when the pawl disengages from the ratchet is relatively large, which can damage the pawl or ratchet and thus affect the parking function. At the same time, the noise generated when the pawl and ratchet engage is also relatively large, affecting the ride comfort.

[0035] In view of this, this application provides a parking mechanism that can reduce the impact generated when the ratchet and pawl engage, and can also reduce noise.

[0036] Firstly, embodiments of this application provide a parking mechanism, with reference to... Figures 1 to 4 The parking mechanism includes a ratchet 1, a stop 3, a swing member 4, and a pawl 5. The ratchet 1 is connected to the drive shaft 2 of a first motor. The stop 3 is fixed to the vehicle body and surrounds a portion of the ratchet 1 along its circumference. The swing member 4 is sleeved on the drive shaft 2 of the first motor and is rotatable relative to the drive shaft 2. The pawl 5 is located on the swing member 4 and is movable relative to the swing member 4 along the radial direction of the ratchet 1, so that the pawl 5 can disengage from or engage with the ratchet 1. The pawl 5 has a first side surface 51 along the circumference of the ratchet 1, and the stop 3 is adapted to engage with the first side surface 51 to disengage the pawl 5 from the ratchet 1.

[0037] The drive shaft 2 of the first motor has an external spline, and the ratchet 1 has an internal spline. The external spline on the drive shaft 2 of the first motor and the internal spline on the ratchet 1 are interference-fitted. The ratchet 1 rotates under the action of the drive shaft 2 of the first motor. The stop 3 is fixed to the vehicle body, and the swing member 4 is rotatably sleeved on the drive shaft 2 of the first motor. When the swing member 4 rotates, it drives the pawl 5 to rotate. When the swing member 4 drives the pawl 5 to rotate to the side where the stop 3 is away from the ratchet 1, the pawl 5 disengages from the ratchet 1. When the swing member 4 drives the pawl 5 to rotate until it disengages from the stop 3, the pawl 5 engages with the ratchet 1. That is to say, when the pawl 5 disengages from the ratchet 1, the stop 3 is located between the pawl 5 and the ratchet 1, preventing the engagement between the pawl 5 and the ratchet 1.

[0038] The first side surface 51 and the stop member 3 can be understood as follows: the stop member 3 has a surface that matches the first side surface 51. When the pawl 5 rotates under the action of the swing member 4, the stop member 3 presses the pawl 5 to move away from the ratchet 1, facilitating the pawl 5 to disengage from the ratchet 1 and reducing the resistance encountered by the pawl 5 when disengaging from the ratchet 1. The first side surface 51 can be a slope, an arc surface, etc., and the stop member 3 can be a slope or arc surface that corresponds to the first side surface 51.

[0039] In this application, when the vehicle needs to remain parked, the swing member 4 drives the pawl 5 to rotate, and the first side 51 of the pawl 5 moves along the stop member 3 toward the ratchet 1 so that the ratchet 1 and the pawl 5 engage. The stop member 3 provides a buffer for the movement of the pawl 5 toward the ratchet 1, thereby reducing the impact of the pawl 5 on the ratchet 1. When the vehicle needs to be released from the parking state, the swing member 4 drives the pawl 5 to rotate, and the first side 51 of the pawl 5 abuts against the stop member 3. The stop member 3 presses the pawl 5 to move away from the ratchet 1 relative to the swing member 4, so that the pawl 5 can disengage from the ratchet 1. The stop member 3 provides assistance for the movement of the pawl 5 toward or away from the ratchet 1, making it easier for the pawl 5 to disengage from the ratchet 1.

[0040] Optionally, refer to Figure 1 and Figure 2 The first side surface 51 is constructed as a curved surface that is concave towards its own interior.

[0041] The first side surface 51 is a concave curved surface. When the pawl 5 disengages from the ratchet 1, the first side surface 51 slides along the surface of the stop 3, and the contact position between the pawl 5 and the stop 3 changes continuously, resulting in a uniform distribution of wear between the pawl 5 and the stop 3. At the same time, the stop 3 pushes the pawl 5 away from the ratchet 1, making the disengagement of the pawl 5 from the ratchet 1 smoother and improving reliability. When parking is required, the swing member 4 drives the pawl 5 to rotate to engage with the ratchet 1. The first side surface 51 slides along the surface of the stop 3, and the contact position between the pawl 5 and the stop 3 changes continuously, making the disengagement of the pawl 5 from the ratchet 1 smoother and reducing impact and noise.

[0042] Optionally, refer to Figure 2 The stop member 3 includes a connected body portion 31 and a guide portion 32. The guide portion 32 is adapted to cooperate with the first side 51. From the body portion 31 to the guide portion 32, the size of the guide portion 32 gradually decreases along the radial direction of the ratchet 1.

[0043] The guide portion 32 is thinned on the side away from the main body 31 to guide the movement of the pawl 5. When parking is required, the guide portion 32 guides the pawl 5, making the contact between the first side 51 and the guide portion 32 smoother, reducing the impact and noise during the engagement of the pawl 5 and the ratchet 1. When parking is required, the first side 51 of the pawl 5 slides along the surface of the guide portion 32 to achieve smooth radial movement.

[0044] Optionally, refer to Figure 1 and Figure 2Along the radial direction of the ratchet 1, the guide portion 32 has a second side surface 321 away from the ratchet 1, and the second side surface 321 is constructed as an arc surface. The second side surface 321 cooperates with the first side surface 51, and the second side surface 321 of the guide portion 32 provides guidance for the movement of the pawl 5. Exemplarily, the second side surface 321 is an arc surface that protrudes away from itself, and the concave first side surface 51 and the convex second side surface 321 are in line contact, making the movement of the pawl 5 more stable, smooth and continuous, and reducing wear and abnormal noise of the pawl 5 and the guide portion 32.

[0045] Optionally, refer to Figure 2 The main body 31 has a third side surface 311 that is away from the ratchet 1. The third side surface 311 is constructed as an arc surface, and the curvature of the third side surface 311 is less than the curvature of the second side surface 321.

[0046] When the vehicle is in the parking position, the main body 52 provides load-bearing support for the pawl 5, keeping the pawl 5 separated from the ratchet 1. The second side 321 with a larger curvature provides smooth guidance for the movement of the pawl 5, reducing impact or jamming. The third side 311 with a smaller curvature has a smoother surface and higher load-bearing capacity, which increases the contact area between the pawl 5 and the third side 311, reduces contact stress, and improves the life of the stop 3.

[0047] For example, the curvature of the first side surface 51 is less than the curvature of the second side surface 321, that is, the radius of curvature of the first side surface 51 is greater than the radius of curvature of the second side surface 321. When the pawl 5 moves relative to the guide portion 32, the friction between the pawl 5 and the guide portion 32 is similar to rolling friction, which makes the movement of the pawl 5 smoother and can reduce the wear of the pawl 5 and the stop member 3.

[0048] In an optional embodiment, along the circumference of the ratchet 1, the second side 321 of the body portion 31 is provided with a groove 312 for accommodating the pawl 5. When the vehicle is in the released parking state, the pawl 5 is engaged in the groove 312, reducing the risk of the pawl 5 dislodging from the body portion 31 under vibration, and reducing the accidental engagement of the pawl 5 with the ratchet 1 when in the parked state.

[0049] Optionally, refer to Figure 3 The pawl 5 includes a main body 52 and an engagement part 53. The main body 52 is movably disposed on the swing member 4, and the outer peripheral surface of the main body 52 is provided with an abutment part 54. The parking mechanism includes an elastic member 6, which is sleeved on the main body 52. ​​Along the axial direction of the elastic member 6, one end of the elastic member 6 abuts against the swing member 4, and the other end of the elastic member 6 abuts against the abutment part 54.

[0050] Along the axial direction of the elastic member 6, the abutting portion 54 can be spaced apart from the engaging portion 53 or integrally formed. Along the axial direction of the elastic member 6, the abutting portion 54 has a surface protruding from the main body portion 52, which provides support for one end of the elastic member 6, while the other end of the elastic member 6 presses against the swing member 4. The elastic member 6 is always in a compressed state, and the elastic member 6 can press the pawl 5 to always maintain an abutting state with the main body portion 31 or press the pawl 5 to always maintain an engaging state with the ratchet 1.

[0051] In other words, when the vehicle needs to be parked, the elastic member 6 can be used to press the engaging part 53 towards the ratchet 1 to engage with it. That is, under the action of elastic force, the elastic member 6 drives the pawl 5 towards the ratchet 1 and presses the engaging part 53 into the groove between two adjacent ratchet teeth on the ratchet 1, which can reduce the probability of the ratchet 1 and the pawl 5 failing to engage. When the vehicle is released from the parking state, the elastic member 6 presses the pawl 5 against the body part 31.

[0052] In one specific embodiment, the end of the engaging portion 53 away from the main body portion 52 has a ball or roller. When the pawl 5 moves relative to the stop member 3, the friction between the engaging portion 53 and the stop member 3 is rolling friction, thereby reducing the friction between the engaging portion 53 and the stop member 3, and thus reducing the wear of the engaging portion 53 and the stop member 3.

[0053] Optionally, refer to Figure 3 The swing member 4 has a first hole 41 extending radially along the ratchet 1. The main body 52 is movably disposed in the first hole 41, and one end of the elastic member 6 abuts against the bottom wall of the first hole 41. The axial direction of the first hole 41 is parallel to the axial direction of the elastic member 6, and the first hole 41 has a bottom wall along the axial direction of the first hole 41. One end of the elastic member 6 abuts against the bottom wall of the first hole 41, and the other end abuts against the abutting part 54 of the pawl 5. In the parking state, the elastic member 6 provides elastic force to move the pawl 5 toward the ratchet 1 and presses the pawl 5 against the ratchet 1 to maintain the engagement state; when the parking state is released, the elastic member 6 presses the pawl 5 against the stop member 3.

[0054] Optionally, refer to Figure 3 The swing member 4 is also provided with a second hole 42, which extends radially along the ratchet 1 and penetrates the bottom wall of the first hole 41; the pawl 5 also includes a limiting part 55 and a connecting part 56, the connecting part 56 passes through the second hole 42 and is detachably connected to the main body part 52, the limiting part 55 is connected to the end of the connecting part 56 away from the main body part 52, and the outer diameter of the limiting part 55 is larger than the diameter of the second hole 42.

[0055] The first hole 41 communicates with the second hole 42. The diameter of the first hole 41 is larger than that of the second hole 42, so that the elastic member 6 can abut against the bottom wall of the first hole 41. The connecting part 56 is connected to the end of the main body 52 away from the engaging part 53. The outer diameter of the limiting part 55 is larger than that of the second hole 42, so as to reduce the risk of the pawl 5 falling out of the first hole 41.

[0056] For example, the connecting part 56 and the limiting part 55 can be configured as screws connected to the main body part 52 to facilitate the installation and engagement between the pawl 5 and the swing member 4.

[0057] Optionally, refer to Figure 1 , Figure 2 and Figure 4 The parking mechanism also includes a second motor 7, a first link 8 and a second link 9. One end of the first link 8 is connected to the drive shaft of the second motor 7, and the other end of the first link 8 is hinged to one end of the second link 9. The other end of the second link 9 is hinged to the swing member 4.

[0058] The rotation of the second motor 7 drives the first connecting rod 8 to rotate, which in turn drives the second connecting rod 9 to swing. The second connecting rod 9 then drives the swinging member 4 to rotate, and the swinging member 4 drives the pawl 5 to maintain or release the parking state under the action of the elastic member 6. For example, the ratchet 1 and pawl 5 can achieve one-way parking; that is, when the pawl 5 is engaged with the ratchet 1, clockwise rotation of the ratchet 1 achieves effective parking. Conversely, counterclockwise rotation of the ratchet 1 will push up the pawl 5, preventing two-way parking.

[0059] Optionally, refer to Figure 3 The parking mechanism also includes a bearing 10, the inner ring of which mates with the drive shaft of the first motor, and the outer ring of which mates with the swing member 4. Along the axial direction of the ratchet 1, the swing member 4 is provided with a third hole 43, which includes a third section and a fourth section. The third section is closer to the ratchet 1 than the fourth section, and the fourth section mates with the outer ring of the bearing 10. The diameter of the third section is smaller than that of the fourth section to form a stepped surface. Along the circumference of the ratchet 1, the drive shaft of the first motor is provided with a limiting groove. The parking mechanism also includes a first retaining spring 11, which is located in the limiting groove. Along the axial direction of the ratchet 1, the inner ring of the bearing 10 abuts against the first retaining spring 11, and the outer ring of the bearing 10 abuts against the stepped surface.

[0060] The bearing 10 is a deep groove ball bearing 10. The inner ring of the bearing 10 is interference-fitted with the drive shaft 2 of the first motor. The inner ring of the bearing 10 abuts against the first retaining ring 11. The first retaining ring 11 provides positioning for the installation of the inner ring of the bearing 10, improving the installation accuracy of the inner ring of the bearing 10. The outer ring of the bearing 10 is interference-fitted with the swing member 4. The outer ring of the bearing 10 abuts against the stepped surface. The stepped surface provides positioning for the installation of the outer ring of the bearing 10, improving the installation accuracy of the outer ring of the bearing 10.

[0061] For example, the drive shaft of the second motor 7 is connected to the first connecting rod 8 by an interference fit to achieve power transmission. The first connecting rod 8 and the second connecting rod 9 are connected by a first pin 12 and a second retaining ring, and the second connecting rod 9 and the swing member 4 are connected by a second pin and a third retaining ring 13 to facilitate the rotation of the second connecting rod 9 and the swing member 4.

[0062] For example, the swing member 4 includes a first part and a second part. The first part is sleeved on the drive shaft 2 of the first motor, and the second part is located radially outside the first part and extends axially toward the ratchet 1 along the drive shaft 2 of the first motor. The pawl 5 is located on the second part and can move relative to the second part toward or away from the ratchet 1. The second link 9 is connected to the first part to drive the first part to rotate. The first part drives the second part and the pawl 5 to rotate. While rotating, the pawl 5 can move relative to the second part toward or away from the ratchet 1.

[0063] Secondly, embodiments of this application provide a vehicle including the parking mechanism described in any of the above embodiments. The vehicle in this application, including the parking mechanism described in any of the above embodiments, possesses the beneficial effects of the parking mechanism described in any of the above embodiments.

[0064] In this application, the rotation of the pawl 5 is controlled by the swing member 4, and the radial extension and retraction of the pawl 5 along the ratchet is controlled by the elastic member 6, thereby achieving the holding and release of the parking brake force. The first side surface 51 of the pawl 5 is constructed as a concave curved surface, and the second side surface 321 of the stop member 3 cooperates with the first side surface 51 to facilitate the engagement and disengagement of the ratchet 1 and the pawl 5, thereby reducing the impact and noise of the engagement of the ratchet 1 and the pawl 5.

[0065] For example, refer to Figure 1 , Figure 2 and Figure 4When the second motor 7 rotates counterclockwise, the drive shaft of the second motor 7 drives the first connecting rod 8 to rotate counterclockwise in sync, thereby causing the second connecting rod 9 to swing to the right, and then causing the swinging member 4 to rotate counterclockwise around the bearing 10. During this rotation, the first side 51 of the pawl 5 is always in contact with and slides against the second side 321 on the guide part 32 of the stop member 3 until the pawl 5 rotates into the slot of the ratchet 1 to achieve parking. Since the elastic member 6 is always in the state of releasing compression energy, the pawl 5 can effectively be engaged in the slot of the ratchet 1. Conversely, when the second motor 7 rotates clockwise, the drive shaft of the second motor 7 drives the first connecting rod 8 to rotate clockwise synchronously, thereby causing the second connecting rod 9 to swing to the left, and then causing the swinging member 4 to rotate clockwise around the bearing 10. During this rotation, since the first side surface 51 of the pawl 5 is a concave curved surface, when the pawl 5 rotates clockwise, after the first side surface 51 contacts the guide part 32 of the stop member 3, the oblique force on the contact line segment is decomposed and the vertical component of the force in the direction away from the ratchet 1 in the radial direction is greater than the resistance to overcoming the rotation. Therefore, the pawl 5 can overcome the resistance to rotation and the resistance of the spring to move upward. Thus, the second side surface 321 of the guide part 32 can press against the first side surface 51 so that the pawl 5 is completely pushed out of the slot of the ratchet 1 without affecting the working rotation of the ratchet 1, thereby realizing the parking release function.

[0066] In addition, this application can also detect whether the second motor 7 has rotated to the correct position by monitoring the status signal of the second motor 7. The parking mechanism of this application also includes a displacement sensor to monitor whether the pawl 5 is engaged in the slot of the ratchet 1, thereby realizing the monitoring of the parking status.

[0067] It should also be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0068] The various embodiments in this specification are described in a progressive manner. Similar or identical parts between embodiments can be referred to interchangeably. Each embodiment focuses on describing the differences from other embodiments. In particular, the system embodiments are basically similar to the method embodiments, so the description is relatively simple; relevant parts can be referred to the descriptions in the method embodiments.

[0069] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

[0070] Although embodiments of this application have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of this application, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A parking mechanism, characterized by, The parking mechanism comprises: a ratchet wheel (1) connected with a driving shaft (2) of a first motor; a stopper (3) fixed to a vehicle body and surrounding a part of the ratchet wheel (1) along a circumferential direction of the ratchet wheel (1); a swing member (4) sleeved on the driving shaft (2) of the first motor and rotatable relative to the driving shaft (2) of the first motor; a pawl (5) provided on the swing member (4) and movable relative to the swing member (4) along a radial direction of the ratchet wheel (1) so as to be disengaged from or engaged with the ratchet wheel (1); wherein the pawl (5) has a first side surface (51) along the circumferential direction of the ratchet wheel (1), and the stopper (3) is adapted to engage with the first side surface (51) so as to disengage the pawl (5) from the ratchet wheel (1).

2. The parking mechanism according to claim 1, characterized in that The first side surface (51) is configured as a curved surface recessed towards an inner portion thereof.

3. The parking mechanism according to claim 1, wherein The stopper (3) comprises a body portion (31) and a guide portion (32) connected with each other, the guide portion (32) is adapted to engage with the first side surface (51), and a dimension of the guide portion (32) along the radial direction of the ratchet wheel (1) gradually decreases from the body portion (31) to the guide portion (32).

4. A parking mechanism according to claim 3, wherein The guide portion (32) has a second side surface (321) away from the ratchet wheel (1) along the radial direction of the ratchet wheel (1), and the second side surface (321) is configured as an arc surface.

5. A parking mechanism according to claim 4, wherein The body portion (31) has a third side surface (311) away from the ratchet wheel (1), and the third side surface (311) is configured as an arc surface, and a curvature of the third side surface (311) is smaller than a curvature of the second side surface (321).

6. The parking mechanism of claim 1, wherein, The pawl (5) comprises a main body portion (52) and an engaging portion (53), the main body portion (52) is movably provided on the swing member (4), and an outer circumferential surface of the main body portion (52) protrudes with an abutting portion (54). The parking mechanism comprises a resilient member (6) sleeved on the main body portion (52), and one end of the resilient member (6) abuts against the swing member (4) along an axial direction of the resilient member (6), and the other end of the resilient member (6) abuts against the abutting portion (54).

7. A parking mechanism according to claim 6, wherein The swing member (4) is provided with a first hole (41) extending along the radial direction of the ratchet wheel (1), the main body portion (52) is movably provided in the first hole (41), and one end of the resilient member (6) abuts against a bottom wall of the first hole (41).

8. The parking mechanism of claim 7, wherein, The swing member (4) is further provided with a second hole (42) extending along the radial direction of the ratchet wheel (1), and the second hole (42) penetrates through the bottom wall of the first hole (41). The pawl (5) further comprises a limiting portion (55) and a connecting portion (56), the connecting portion (56) is detachably connected with the main body portion (52) through the second hole (42), and the limiting portion (55) is connected to one end of the connecting portion (56) away from the main body portion (52), and an outer diameter of the limiting portion (55) is greater than a hole diameter of the second hole (42).

9. The parking mechanism of claim 1, wherein, Also included are a second motor (7), a first connecting rod (8) and a second connecting rod (9), one end of the first connecting rod (8) being connected with a drive shaft of the second motor (7), the other end of the first connecting rod (8) being hingedly connected with one end of the second connecting rod (9), the other end of the second connecting rod (9) being hingedly connected with the oscillating member (4).

10. A vehicle characterized by comprising: The parking mechanism according to any one of claims 1 to 9. The parking mechanism according to any one of claims 1 to 9.

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