Parking lock mechanism and vehicle

Abstract

The application relates to the technical field of vehicles, in particular to a parking locking mechanism and a vehicle. The application provides a parking locking mechanism, which comprises a ratchet wheel, a locking module shell and a plurality of pawls. The ratchet wheel is connected with a motor driving shaft. The plurality of pawls are arranged at intervals along the circumference of the ratchet wheel. The pawl has a first end and a second end. The first end is rotationally arranged in the locking module shell. The second end of the pawl is selectively engaged with the ratchet wheel, so that the vehicle is released or kept in the parking state. The parking locking mechanism can play a role of redundancy backup and improve the stability of the parking locking mechanism.

Description

Technical Field

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

[0002] Vehicle parking brake is a key safety feature. Traditional cars typically achieve parking in two ways. One is a mechanical handbrake in the driver's cab, connected to the rear wheel drum brakes via a cable. The force applied to the handbrake is transmitted to the wheel ends, causing the brake pads to open and generating parking braking force to park the vehicle. The other is an electronic parking brake (EPB) based on rear wheel caliper brakes. The driver presses the parking button inside the vehicle, and the parking signal is transmitted to the EPB unit at the wheel end through the vehicle's wiring harness. The EPB motor drives the transmission mechanism to push the friction pads to clamp the brake pads. After reaching the required parking clamping force, the transmission mechanism self-locks, maintaining the clamping force and achieving the purpose of parking.

[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 second solution uses a locking mechanism to lock the transmission mechanism and maintain clamping force to achieve parking. The locking mechanism mainly uses a single pawl engaging with a ratchet. If the pawl and ratchet disengage, or if the pawl breaks, deforms, or fails to lubricate, the vehicle may slip. Utility Model Content

[0004] This application provides a parking lock mechanism and a vehicle, which can serve as a redundancy backup and improve the stability of the parking lock mechanism.

[0005] To achieve the above objectives, the main technical solutions adopted in this application include:

[0006] In a first aspect, embodiments of this application provide a parking locking mechanism, which includes a ratchet, a locking module housing, and a plurality of pawls. The ratchet is connected to a motor drive shaft. The plurality of pawls are spaced apart along the circumference of the ratchet. Each pawl has a first end and a second end. The first end is rotatably disposed on the locking module housing. The second end of the pawl selectively engages with the ratchet to release or maintain the parking state of the vehicle.

[0007] The parking lock mechanism proposed in this application has multiple pawls spaced circumferentially along the ratchet. Each pawl selectively engages with the ratchet. When the vehicle needs to remain parked, the second end of the pawl rotates towards the ratchet and engages with it; when the vehicle needs to be released from parking, the second end of the pawl rotates away from the ratchet and disengages. By using multiple pawls simultaneously exerting force on the ratchet, even if the engagement of a single pawl fails, other pawls remain engaged to maintain the engagement, providing redundancy and improving the stability of the parking lock mechanism.

[0008] Optionally, the parking locking mechanism further includes a ratchet cover rotatably disposed on the locking module housing to be selectively located between the second end of the pawl and the ratchet.

[0009] In the above embodiments, the ratchet cover allows multiple pawls to simultaneously engage or disengage from the ratchet, improving the stability of the parking lock mechanism. Furthermore, the rotation of the ratchet cover allows multiple pawls to simultaneously engage or disengage from the ratchet, enhancing the stability of the parking lock mechanism. Compared to a system where each pawl corresponds to a separate drive mechanism, the parking lock mechanism in this application reduces weight, lowers cost, and decreases size.

[0010] Optionally, the ratchet cover includes multiple sidewalls spaced apart along the circumference of the ratchet to form multiple notches. When the vehicle is in the released parking state, each sidewall is located between the second end of the ratchet and the corresponding pawl. When the vehicle is in the held parking state, the second end of each pawl passes through the corresponding notch and engages with the ratchet.

[0011] In the above embodiments, the sidewalls of the ratchet cover are used to isolate the ratchet and pawl when the parking state is released, reducing the probability of the pawl accidentally engaging and locking with the ratchet when the parking state is released; the notch of the ratchet cover is used to provide a channel for the pawl to engage with the ratchet when the parking state is maintained. When the ratchet cover rotates, multiple sidewalls also rotate simultaneously, and multiple sidewalls act on their corresponding pawls simultaneously, causing multiple pawls to engage or disengage with the ratchet at the same time. Multiple pawls work simultaneously, and the force is evenly distributed, reducing the uneven load or jamming caused by a single pawl acting first.

[0012] Optionally, the parking lock mechanism further includes a drive mechanism, which includes a drive member and a pull rod. The drive member is disposed in the locking module housing, and the drive end of the drive member is connected to one end of the pull rod to drive the pull rod to move in a straight line. The ratchet cover is provided with a connecting rod, which is connected to the other end of the pull rod to rotate under the drive of the pull rod.

[0013] Optionally, the pull rod is provided with an elongated hole, and the connecting rod is slidably connected to the elongated hole, the length direction of the elongated hole being parallel to the movement direction of the pull rod; the parking locking mechanism further includes a first reset member, one end of which is connected to the locking module housing, and the other end of which is connected to the connecting rod.

[0014] Optionally, the locking module housing is provided with a first post, the connecting rod is provided with a second post, one end of the first reset member is connected to the first post, and the other end of the first reset member is connected to the second post.

[0015] Optionally, the locking module housing has a first through hole through which the motor drive shaft passes; the ratchet cover has a bottom wall, the bottom wall is connected to a plurality of the side walls and forms a receiving space for accommodating the ratchet, and a protrusion is provided on the side of the bottom wall away from the receiving space, the protrusion being located between the motor drive shaft and the inner wall of the first through hole.

[0016] Optionally, the parking lock mechanism further includes a second reset member, one end of which is connected to the locking module housing and the other end of which is connected to the second end.

[0017] Optionally, the locking module housing is further provided with a third post, one end of the second reset member is connected to the third post, and the other end of the second reset member is connected to the second end.

[0018] Secondly, embodiments of this application provide a vehicle including the parking locking mechanism described in any of the above embodiments. The vehicle in this application has the beneficial effects of the parking locking mechanism described in any of the above embodiments. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a schematic diagram of the parking lock mechanism in one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the parking lock mechanism in one embodiment of this application;

[0022] Figure 3 for Figure 2 Cross-sectional view of section DD.

[0023] [Explanation of Labels in the Attached Image]

[0024] 1. Ratchet;

[0025] 2. Locking module housing; 21. First through hole;

[0026] 3. Claw; 31. First end; 32. Second end;

[0027] 4. Ratchet cover; 41. Side wall; 42. Notch; 43. Connecting rod; 44. Protrusion;

[0028] 5. Drive mechanism; 51. Drive component; 52. Tie rod; 521. Long hole;

[0029] 6. First reset component;

[0030] 71. First pillar; 72. Second pillar; 73. Third pillar; 74. Fourth pillar;

[0031] 8. Second reset component;

[0032] 10. Motor drive shaft;

[0033] X, the direction of movement of the lever. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0040] The current locking mechanism mainly adopts a single pawl and ratchet engagement scheme. Under dynamic working conditions, the pawl and ratchet are prone to disengagement due to vibration and other reasons, which can lead to the failure of the locking mechanism. Furthermore, the pawl may break, deform, or fail to lubricate during use. Pawl failure will cause the locking mechanism to fail, resulting in the vehicle slipping.

[0041] In addition, if multiple redundant pawls are used, each pawl requires an independent drive chain, resulting in excessive weight and size of the entire locking mechanism and excessive space occupation.

[0042] Firstly, reference Figures 1 to 3This application provides a parking locking mechanism, which includes a ratchet 1, a locking module housing 2, and multiple pawls 3. The ratchet 1 is connected to a motor drive shaft 10. Multiple pawls 3 are spaced apart along the circumference of the ratchet 1. Each pawl 3 has a first end 31 and a second end 32. The first end 31 is rotatably mounted on the locking module housing 2. The second end 32 of the pawl 3 selectively engages with the ratchet 1 to release or maintain the parking state of the vehicle. Multiple pawls 3 simultaneously engage or disengage from the ratchet 1. That is, when the parking state needs to be maintained, the second ends 32 of multiple pawls 3 simultaneously rotate towards the ratchet 1 to engage with it; when the parking state needs to be released, the second ends 32 of multiple pawls 3 simultaneously rotate away from the ratchet 1 to disengage.

[0043] The parking locking mechanism proposed in this application embodiment has multiple pawls 3 spaced circumferentially along the ratchet 1. Each pawl 3 selectively engages with the ratchet 1. When the vehicle needs to remain parked, the second end 32 of the pawl 3 rotates towards the ratchet 1 and engages with it. When the vehicle needs to release from parking, the second end 32 of the pawl 3 rotates away from the ratchet 1 and disengages. By using multiple pawls 3 to simultaneously exert force on the ratchet 1, even if the engagement between a single pawl 3 and the ratchet 1 fails, other pawls 3 remain engaged to maintain the engagement, providing redundancy and improving the stability of the parking locking mechanism.

[0044] Optionally, refer to Figure 1 and Figure 2 The parking locking mechanism also includes a ratchet cover 4, which is rotatably disposed on the locking module housing 2 and is selectively located between the second end 32 of the pawl 3 and the ratchet 1.

[0045] When the vehicle needs to be released from parking, the ratchet cover 4 rotates, pressing and pushing the second end 32 of the pawl 3 away from the ratchet 1 to disengage from it. The ratchet cover 4 remains between the pawl 3 and the ratchet 1, reducing the chance of the pawl 3 accidentally engaging and locking with the ratchet 1 when releasing the parking position. When the vehicle needs to be kept in parking position, the ratchet cover 4 rotates back, disengaging from the pawl 3. The second end 32 of the pawl 3 then rotates towards the ratchet 1 and engages with it. The ratchet cover 4 allows multiple pawls 3 to simultaneously disengage from or engage with the ratchet 1, improving the stability of the parking locking mechanism.

[0046] In addition, the rotation of the ratchet cover 4 in this application allows multiple pawls 3 to engage or disengage from the ratchet 1 simultaneously, which improves the stability of the parking locking mechanism. Furthermore, compared to each pawl 3 being driven by a drive mechanism 5, the parking locking mechanism in this application reduces weight, lowers cost, and reduces size.

[0047] Optionally, refer to Figure 1The ratchet cover 4 includes multiple sidewalls 41. Along the circumference of the ratchet 1, the multiple sidewalls 41 are spaced apart to form multiple notches 42. When the vehicle is in the released parking state, each sidewall 41 is located between the ratchet 1 and the second end 32 of the corresponding pawl 3. When the vehicle is in the parked state, the second end 32 of each pawl 3 passes through the corresponding notch 42 and engages with the ratchet 1.

[0048] The sidewalls 41 of the ratchet cover 4 are used to isolate the ratchet 1 and the pawl 3 when the parking position is released, reducing the probability of the pawl 3 accidentally engaging and locking with the ratchet 1 when the parking position is released. The notch 42 of the ratchet cover 4 is used to provide a channel for the pawl 3 to engage with the ratchet 1 when the parking position is maintained. When the ratchet cover 4 rotates, multiple sidewalls 41 also rotate simultaneously, and multiple sidewalls 41 act on the corresponding pawls 3 simultaneously, so that multiple pawls 3 engage or disengage with the ratchet 1 at the same time. Multiple pawls 3 work at the same time, and the force is evenly distributed, reducing the uneven load or jamming caused by the first action of a single pawl 3.

[0049] When the vehicle needs to be released from parking, the ratchet cover 4 rotates, the side wall 41 presses against and pushes the second end 32 of the pawl 3 to rotate away from the ratchet 1, and disengages from the ratchet 1. The ratchet cover 4 remains between the pawl 3 and the ratchet 1. When the vehicle needs to be kept in parking position, the ratchet cover 4 rotates back, the side wall 41 disengages from the second end 32 of the pawl 3, the second end 32 of the pawl 3 rotates towards the ratchet 1 and passes through the notch 42 to engage with the ratchet 1.

[0050] Optionally, refer to Figure 1 and Figure 2 The parking lock mechanism also includes a drive mechanism 5, which includes a drive member 51 and a pull rod 52. The drive member 51 is located in the locking module housing 2. The drive end of the drive member 51 is connected to one end of the pull rod 52 to drive the pull rod 52 to move in a straight line. A connecting rod 43 is provided on the ratchet cover 4. The connecting rod 43 is connected to the other end of the pull rod 52 to rotate under the drive of the pull rod 52.

[0051] The driving element 51 can be a motor or an electromagnet. The driving element 51 drives the pull rod 52 to move linearly, and the pull rod 52 causes the connecting rod 43 to rotate on the locking module housing 2. Exemplarily, the driving element 51 drives the pull rod 52 to move linearly... Figure 1 Moving to the left, the lever 52 pulls the ratchet cover 4 to rotate counterclockwise. The side wall 41 of the ratchet cover 4 presses against the second end 32 of the pawl 3 and rotates it away from the ratchet 1. The pawl 3 disengages from the ratchet 1, and the vehicle is in the released parking state. The drive unit 51 drives the lever 52 to move to the left. Figure 1 When the lever 52 moves to the right, it pulls the ratchet cover 4 to rotate clockwise. The side wall 41 of the ratchet cover 4 disengages from the second end 32 of the pawl 3. The second end 32 of the pawl 3 rotates towards the ratchet 1. The pawl 3 engages with the ratchet 1, and the vehicle is in a parked state.

[0052] It should be noted that the pull rod 52 and the connecting rod 43 can be fixedly connected, with the pull rod 52 directly driving the ratchet cover 4 to rotate through the connecting rod 43; the pull rod 52 can also be directly connected to the ratchet cover 4 to drive the ratchet cover 4 to rotate; the linkage between the pull rod 52 and the ratchet cover 4 can also be in the form of gears and racks or other methods, as long as the pull rod 52 can drive the ratchet cover 4 to rotate while moving in a straight line.

[0053] Optionally, refer to Figure 1 The pull rod 52 is provided with an elongated hole 521, and the connecting rod 43 is slidably connected to the elongated hole 521. The length direction of the elongated hole 521 is parallel to the movement direction X of the pull rod 52. The parking locking mechanism also includes a first reset member 6. One end of the first reset member 6 is connected to the locking module housing 2, and the other end is connected to the connecting rod 43.

[0054] The pull rod 52 and the connecting rod 43 are slidably connected through the elongated hole 521. When the pull rod 52 moves in one direction, it drives the connecting rod 43 to disengage the ratchet cover 4 from the second end 32 of the pawl 3, thus releasing the parking brake. When the pull rod 52 moves in another direction, the connecting rod 43 slides relative to the pull rod 52 to separate the ratchet cover 4 from the pawl 3. Specifically, along the direction of movement X of the pull rod 52, the elongated hole 521 has a first sidewall and a second sidewall, with the first sidewall being farther away from the drive member 51 than the second sidewall. The first reset member 6 provides a restoring force to the ratchet cover 4, causing it to reset. Exemplarily, when the drive member 51 pulls the pull rod 52, the first sidewall presses against the connecting rod 43 towards... Figure 1 When the link moves to the left, the linkage 43 moves towards the left. Figure 1 When the vehicle moves to the left, the first elastic element is stretched. At the same time, the connecting rod 43 drives the ratchet cover 4 to rotate counterclockwise. The ratchet cover 4 presses against the second end 32 of the pawl 3 and rotates away from the ratchet 1. The ratchet 1 separates from the pawl 3, and the vehicle is released from the parking state. When the vehicle needs to be parked, the drive component 51 pushes the pull rod 52 to... Figure 1 The link moves to the right, at which point the link 43 is in a free state within the elongated hole 521. The link 43 will rotate within the elongated hole 521 under the action of the first reset member 6. The link 43 drives the ratchet cover 4 to rotate clockwise. The link 43 stops rotating when it comes into contact with the first side wall 41. The ratchet cover 4 is completely separated from the second end 32 of the pawl 3. The second end 32 of the pawl 3 rotates toward the ratchet 1 until it engages with the ratchet 1, thus keeping the vehicle in a parked state.

[0055] Furthermore, the length of the elongated hole 521 in the X-direction of movement of the tie rod 52 is greater than the width of the connecting rod 43 in the X-direction of movement of the tie rod 52. The elongated hole 521 can compensate for the manufacturing tolerances of the connecting rod 43 and positional deviations during assembly. It also makes it easier for assembly workers to connect the various parts without repeated adjustments.

[0056] The first reset element 6 can be a torsion spring, a compression coil spring, a tension coil spring, a coil spring, a leaf spring, etc.

[0057] Optionally, refer to Figure 1 The locking module housing 2 is provided with a first post 71, the connecting rod 43 is provided with a second post 72, one end of the first reset member 6 is connected to the first post 71, and the other end of the first reset member 6 is connected to the second post 72.

[0058] When installing the first reset component 6 onto the first post 71 and the second post 72, it is simply a matter of hanging or fitting the first reset component 6 onto the first post 71 and the second post 72, without the need for complicated tools or additional fasteners. The operation is simple and efficient. Furthermore, because the force application point is fixed, the reset force changes smoothly and predictably throughout the entire movement, improving the stability of the parking lock mechanism.

[0059] Optionally, refer to Figure 3 The locking module housing 2 has a first through hole 21 through which the motor drive shaft 10 passes. The ratchet cover 4 has a bottom wall, which is connected to multiple side walls 41 to form a receiving space for the ratchet 1. A protrusion 44 is provided on the side of the bottom wall away from the receiving space. The protrusion 44 is located between the motor drive shaft 10 and the inner wall of the first through hole 21. The multiple side walls 41 and the bottom wall of the ratchet cover 4 enclose the receiving space, and the ratchet 1 is received in the receiving space. The protrusion 44 is provided on the side of the bottom wall of the ratchet cover 4 away from the ratchet 1. The protrusion 44 is located in the first through hole 21 and can limit the rotation of the ratchet cover 4, so that the position of the ratchet cover 4 remains stable, thereby improving the stability of the parking locking mechanism.

[0060] Optionally, refer to Figures 1 to 3 The parking locking mechanism also includes a second reset member 8, one end of which is connected to the locking module housing 2, and the other end is connected to the second end 32.

[0061] The second reset member 8 provides a restoring force to the pawl 3. When the ratchet cover 4 presses against the second end 32 of the pawl 3 and rotates away from the ratchet 1, the second end 32 of the pawl 3 presses against the second reset member 8, causing the second reset member 8 to store energy. When the ratchet cover 4 rotates and separates from the second end 32 of the pawl 3, the second reset member 8 presses against the second end 32 of the pawl 3 and rotates towards the ratchet 1, and the second end 32 of the pawl 3 remains engaged with the ratchet 1, thereby keeping the vehicle in a parked state.

[0062] The second reset component 8 can be a torsion spring, a compression coil spring, a tension coil spring, a coil spring, a leaf spring, etc.

[0063] Optionally, refer to Figures 1 to 3The locking module housing 2 is also provided with a third post 73, one end of the second reset member 8 is connected to the third post 73, and the other end of the second reset member 8 is connected to the second end 32.

[0064] For example, the first end 31 of the second reset member 8 is connected to the third post 73, and the other end is connected to the second end 32. Installing the second reset member 8 simply requires mounting or fitting it onto the third post 73 and the second end 32, without the need for complex tools or additional fasteners, making the operation simple and efficient. Furthermore, because the force application point is fixed, the reset force changes smoothly and predictably throughout the entire movement, improving the stability of the parking lock mechanism.

[0065] The locking module housing 2 may also be provided with a fourth post 74, and the pawl 3 is sleeved on the fourth post 74 and can rotate relative to the fourth post 74.

[0066] Secondly, embodiments of this application provide a vehicle including the parking locking mechanism described in any of the above embodiments. The vehicle in this application has the beneficial effects of the parking locking mechanism described in any of the above embodiments.

[0067] refer to Figure 1 In this application, there are two pawls 3. The service brake motor drives the ratchet 1 along... Figure 1 The counterclockwise rotating auxiliary ratchet 1 disengages from the two pawls 3, while the drive component 51 (which can be an electromagnet or a micro motor) moves linearly along the axial direction, driving the pull rod 52 to... Figure 1 The movement to the right in the middle direction, in turn, drives the ratchet cover 4 to press. Figure 1 The ratchet cover 4 rotates counterclockwise within the stroke range, and the ratchet cover 4 is located between the pawl 3 and the ratchet 1. The ratchet cover 4 completely separates the two pawls 3 from the ratchet 1 at the same time. At this time, the drive component 51 no longer operates and remains in the state. At the same time, the two pawls 3 remain separated from the ratchet 1, realizing the release of the parking state and the maintenance of the released state.

[0068] When the service brake motor receives a parking command from the upper-level controller, it establishes clamping force (the motor operates according to the clamping process). Figure 1 (rotating counterclockwise), after achieving the target clamping force, the drive component 51 moves along... Figure 1 The ratchet cover 4 rotates clockwise under the action of the first reset member 6, separating from the two pawls 3. At this time, the two pawls 3 rotate towards the ratchet 1 and gradually contact the ratchet 1. At the same time, the service brake motor slowly rotates clockwise to assist the two pawls 3 in engaging with the ratchet 1 until the two pawls 3 are fully engaged with the ratchet 1 and remain locked, thus realizing parking lock and maintaining the locked state.

[0069] 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.

[0070] 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.

[0071] The above description is merely an embodiment of this application and is not intended to limit 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 principle of this application should be included within the scope of the claims of this application.

[0072] 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 lock mechanism, characterized in that, include: Ratchet (1) is connected to the motor drive shaft (10); The locking module housing (2) and a plurality of pawls (3) are arranged at intervals along the circumference of the ratchet (1). Each pawl (3) has a first end (31) and a second end (32). The first end (31) is rotatably disposed on the locking module housing (2). The second end (32) of the pawl (3) selectively engages with the ratchet (1) to release or maintain the parking state of the vehicle.

2. The parking locking mechanism according to claim 1, characterized in that, It also includes a ratchet cover (4), which is rotatably disposed on the locking module housing (2) to be selectively located between the second end (32) of the pawl (3) and the ratchet (1).

3. The parking locking mechanism according to claim 2, characterized in that, The ratchet cover (4) includes a plurality of sidewalls (41) spaced apart along the circumference of the ratchet (1) to form a plurality of notches (42). When the vehicle is in the released parking state, each sidewall (41) is located between the ratchet (1) and the second end (32) of the corresponding pawl (3). When the vehicle is in the held parking state, the second end (32) of each pawl (3) passes through the corresponding notch (42) and engages with the ratchet (1).

4. The parking locking mechanism according to claim 2, characterized in that, It also includes a drive mechanism (5), which includes a drive member (51) and a pull rod (52). The drive member (51) is located in the locking module housing (2). The drive end of the drive member (51) is connected to one end of the pull rod (52) to drive the pull rod (52) to move in a straight line. The ratchet cover (4) is provided with a connecting rod (43), which is connected to the other end of the pull rod (52) so as to rotate under the drive of the pull rod (52).

5. The parking locking mechanism according to claim 4, characterized in that, The pull rod (52) is provided with an elongated hole (521), and the connecting rod (43) is slidably connected to the elongated hole (521). The length direction of the elongated hole (521) is parallel to the movement direction (X) of the pull rod (52). The parking locking mechanism also includes a first reset member (6), one end of which is connected to the locking module housing and the other end is connected to the connecting rod (43).

6. The parking locking mechanism according to claim 5, characterized in that, The locking module housing (2) is provided with a first post (71), the connecting rod (43) is provided with a second post (72), one end of the first reset member (6) is connected to the first post (71), and the other end of the first reset member (6) is connected to the second post (72).

7. The parking locking mechanism according to claim 3, characterized in that, The locking module housing (2) is provided with a first through hole (21) through which the motor drive shaft (10) passes; The ratchet cover (4) has a bottom wall, which is connected to a plurality of side walls (41) to form a receiving space for accommodating the ratchet (1). A protrusion (44) is provided on the side of the bottom wall away from the receiving space. The protrusion (44) is located between the inner wall of the motor drive shaft (10) and the first through hole (21).

8. The parking locking mechanism according to claim 1, characterized in that, It also includes a second reset member (8), one end of which is connected to the locking module housing (2), and the other end is connected to the second end (32).

9. The parking locking mechanism according to claim 8, characterized in that, The locking module housing (2) is also provided with a third post (73), one end of the second reset member (8) is connected to the third post (73), and the other end of the second reset member (8) is connected to the second end (32).

10. A vehicle, characterized in that, Includes the parking locking mechanism as described in any one of claims 1 to 9.

Images