CN210290720U

CN210290720U - Parking driving mechanism

Info

Publication number: CN210290720U
Application number: CN201920822430.XU
Authority: CN
Inventors: 陈学军
Original assignee: Zhuzhou Gear Co Ltd
Current assignee: Zhuzhou Gear Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-04-10
Anticipated expiration: 2029-05-31

Abstract

The utility model relates to a parking actuating mechanism. The parking driving mechanism comprises a parking driving piece, a transmission assembly and a parking assembly. The transmission assembly comprises a guide shaft and a conical sleeve. The parking driving piece is in transmission connection with the conical sleeve to drive the conical sleeve to slide along the guide shaft. The parking assembly comprises a parking arm, an elastic piece and a ratchet wheel provided with a parking groove. The parking arm is provided with parking teeth. An abutting portion is formed at one end of the parking arm. The abutting part is slidably abutted with the side wall of the tapered sleeve. The elastic piece provides elastic force for the parking arm so that the parking tooth moves towards the direction of the conical sleeve. The conical sleeve slides along the guide shaft, and the parking arm rotates after overcoming the elastic force provided by the elastic piece until the parking teeth are clamped with the parking groove; the conical sleeve slides along the guide shaft, and the parking arm is enabled to allow the elastic piece to release the elastic force and then rotate until the parking tooth is separated from the parking groove. Therefore, the parking driving mechanism is simple in structure and low in processing cost.

Description

Parking driving mechanism

Technical Field

The utility model relates to a new energy automobile technical field especially relates to a parking actuating mechanism.

Background

With the rapid development of the automobile industry, such as automobiles and engineering vehicles, people have made demands on compact and light transmissions in order to improve the driving performance of the vehicles. In the transmission with the parking function, the parking mechanism generally drives a one-stage or two-stage reduction gear mechanism through a motor, and then drives a bump to shift a parking arm, so that the parking locking and parking unlocking functions of the parking mechanism are realized.

However, the above mechanism involves a large number of parts, and the parking mechanism has a complicated structure, which is not in accordance with the development requirements of compact structure and light weight, and is not favorable for the popularization of the parking mechanism in the field of vehicles such as electric vehicles.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a parking drive mechanism having a simple structure, in order to solve the problem of the conventional parking drive mechanism that the structure is complicated.

A parking drive mechanism comprising:

a parking drive;

the parking driving part is in transmission connection with the conical sleeve so as to drive the conical sleeve to slide along the guide shaft; and

a parking assembly, comprising:

the rotating shaft of the rotatable parking arm is parallel to the guide shaft, the parking tooth is arranged on the parking arm, an abutting part is formed at one end of the parking arm, and the abutting part is slidably abutted with the side wall of the conical sleeve;

the elastic piece acts on the parking arm and provides elastic force for the parking arm so that the parking teeth move towards the direction of the conical sleeve;

the outer cylindrical surface of the ratchet wheel is provided with a parking groove;

the conical sleeve slides along the guide shaft, and the parking arm rotates after overcoming the elastic force provided by the elastic piece until the parking tooth is clamped with or separated from the parking groove; or the conical sleeve slides along the guide shaft, and the parking arm allows the elastic piece to release the elastic force and then rotates until the parking tooth is separated from the parking groove.

In one embodiment, the tapered sleeve is conical, and the abutting portion is a circular arc-shaped groove.

In one embodiment, the tapered sleeve comprises a large end, a small end and a transition section which is connected between the large end and the small end and is tapered, and the large end and the small end are both cylindrical hollow cylindrical structures.

In one embodiment, the transmission assembly further includes a screw and a transmission nut sleeved on the screw and in threaded connection with the screw, the parking driving member is in transmission connection with the screw and drives the screw to rotate, a central axis of the screw is parallel to a central axis of the guide shaft, and the transmission nut is in transmission connection with the conical sleeve.

In one embodiment, the transmission assembly further includes a first baffle and a second baffle, which are oppositely disposed, the first baffle and the second baffle are respectively fixed at two ends of the transmission nut, one ends of the first baffle and the second baffle, which are far away from the screw rod, are slidably sleeved on the guide shaft, and the tapered sleeve is located between the first baffle and the second baffle.

In one embodiment, the parking tooth is disposed on a side of the parking arm opposite to the abutting portion, a shifting block is disposed on a side of the second baffle close to the parking arm, and the shifting block and the parking arm can touch each other to provide an acting force for the parking tooth clamped in the parking slot to disengage the exit tooth from the parking slot.

In one embodiment, a spring is provided at one end of the tapered sleeve to provide a driving force for the tapered sleeve to slide along the guide shaft.

In one embodiment, the driving member is a driving motor having a motor shaft, and the motor shaft is in transmission connection with the screw.

In one embodiment, the motor shaft and the screw rod are of an integrally formed structure.

In one embodiment, a mounting through hole is formed in the middle of the parking arm, the parking assembly further comprises a parking shaft, the parking shaft rotatably penetrates through the mounting through hole, and the elastic piece is mounted at one end, far away from the parking teeth, of the parking arm.

Above-mentioned parking actuating mechanism, under the elastic force effect that the elastic component provided, the arm that parks rotates in order to drive the tooth that parks and move along the direction towards the toper cover. Furthermore, the parking driving part drives the conical sleeve to slide along the guide shaft, and the parking arm rotates after overcoming the elastic force provided by the elastic part so as to drive the parking teeth to move along the direction towards the ratchet wheel until the parking teeth are clamped with the parking groove, so that the parking locking function can be realized; the parking driving piece drives the conical sleeve to slide along the guide shaft, and the parking arm enables the elastic piece to release elastic force and then rotates so as to drive the parking teeth to move along the direction back to the ratchet wheel until the parking teeth are separated from the parking groove, and therefore the parking unlocking function can be achieved. Therefore, the parking driving mechanism can realize the parking locking function and the parking unlocking function only by matching the parking arm with the conical sleeve and the elastic piece with different outer diameters at two ends respectively. Therefore, the parking driving mechanism is simple in structure and low in processing cost.

Drawings

Fig. 1 is a schematic structural view of a parking driving mechanism according to a preferred embodiment of the present invention;

FIG. 2 is a schematic structural view of a parking arm in the parking drive mechanism of FIG. 1;

fig. 3 is a schematic structural view of a tapered sleeve in the parking drive mechanism shown in fig. 1.

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. The invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1, a parking driving mechanism 100 according to a preferred embodiment of the present invention includes a parking driving member 110, a transmission assembly 120 and a parking assembly 130. The parking driving mechanism 100 may be applied to vehicles such as automobiles and engineering vehicles to achieve the functions of parking locking and parking result. Specifically, the parking drive mechanism 100 may be installed in a transmission housing, or may be installed outside the transmission housing or at another position of a vehicle such as an automobile.

The parking driver 110 is used to provide driving force for the parking driving mechanism 100, so that the parking driving mechanism 100 realizes parking lock and parking unlock functions. The parking driver 110 is a prime mover that can generate a rotational assist force, and may be an electric motor, a hydraulic motor, a pneumatic motor, or the like.

The transmission assembly 120 includes a guide shaft 121 and a tapered sleeve 122. The primary function of transmission assembly 120 is to convert rotational assistance to translational assistance to power parking drive mechanism 100 for a parking drive function.

The guide shaft 121 plays a role in supporting and guiding, and is usually made of a metal material with high strength and good wear resistance, such as stainless steel, quenched and tempered steel, and alloy steel, so that the guide shaft 121 has a large bearing capacity.

The tapered sleeve 122 is sleeved on the guide shaft 121. The parking actuator 110 is drivingly connected to the tapered sleeve 122 to drive the tapered sleeve 122 to slide along the guide shaft 121. Thus, the parking driver 110 powers the tapered sleeve 122 to slide the tapered sleeve 122 along the guide shaft 121 within a certain range. Specifically, the outer diameter of one end of the tapered sleeve 122 is larger than the outer diameter of the other end. The conical sleeve 122 is generally made of stainless steel, alloy steel, or other material with high strength and good wear resistance.

The parking assembly 130 includes a parking arm 131, an elastic member 132, and a ratchet 133. The parking assembly 130 is a core component of the parking driving mechanism 100, and is mainly used for implementing a parking lock function or a parking unlock function.

Referring to fig. 2, the parking arm 131 is rotatable. The rotation axis of the parking arm 131 is parallel to the guide shaft 121. The parking arm 131 is provided with a parking tooth 1311. An abutting portion 1312 is formed at one end of the parking arm 131. The abutment 1312 slidably abuts against the side wall of the tapered sleeve 122. Specifically, the parking tooth 1311 may have a rectangular columnar projection structure, or may have a projection structure in a tapered shape, a spherical shape, or the like. Thus, the parking arm 131 rotates, which rotates the parking tooth 1311 around the rotation axis of the parking arm 131.

The elastic member 132 acting on the parking arm 131 provides an elastic force to the parking arm 131 to move the parking tooth 1311 in the direction of the tapered sleeve 122. Thus, under the elastic force provided by the elastic member 132, the parking arm 131 rotates to bring the parking tooth 1311 into movement in a direction toward the tapered sleeve 122, so that the abutting portion 1312 abuts against or aligns with the side wall of one end of the tapered sleeve 122. The elastic member 132 may be a compression spring, a rubber dome, or the like. In the present embodiment, the elastic member 132 is a compression spring.

Specifically, the elastic member 132 may be disposed in the middle of the parking arm 131 and between the rotating shaft of the parking arm 131 and the parking tooth 1311 to provide an elastic force to the parking arm 131 toward the tapered sleeve 122; the elastic element 132 may also be disposed at an end of the parking arm 131 away from the parking tooth 1311 and located at a side of the parking arm 131 where the abutting portion 1312 is disposed, and the rotation axis of the parking arm 131 is disposed at the middle portion of the parking arm 131, at this time, the elastic element 132 provides an elastic force for the parking arm 131 to move away from the tapered sleeve 122. Therefore, the elastic member 132 is mainly used for providing an elastic force to the parking arm 131, so that the parking arm 131 rotates under the elastic force to drive the abutting portion 1312 to move in a direction toward the tapered sleeve 122, so that the abutting portion 1312 abuts against or aligns with a side wall of one end of the tapered sleeve 122.

The outer cylindrical surface of the ratchet wheel 133 is provided with a parking groove 1331. Specifically, the shape of the inner wall of the parking slot 1331 matches the shape of the parking tooth 1311.

The tapered sleeve 122 slides along the guide shaft 121 and rotates the parking arm 131 against the elastic force provided by the elastic member 132 until the parking tooth 1311 engages with the parking groove 1331. Or the tapered sleeve 122 slides along the guide shaft 121, the parking arm 131 allows the elastic member 132 to rotate after releasing the elastic force until the parking tooth 1311 is separated from the parking groove 1331. Specifically, when the parking tooth 1311 is engaged with the parking groove 1331, the parking drive mechanism 100 is in the parking lock state; when the parking tooth 1311 is disengaged from the parking groove 1331, the parking drive mechanism 100 is in the parking unlock state.

The mounting positions of the tapered sleeve 122, the ratchet 133 and the parking arm 131 include two cases: the first is that the ratchet wheel 133 and the tapered sleeve 122 are respectively positioned at two opposite sides of the parking arm 131; in the second case, the ratchet wheel 133 and the tapered sleeve 122 are both disposed on the same side of the parking arm 131. According to different installation positions of the ratchet wheel 133, when the parking drive mechanism 100 realizes parking locking and parking unlocking, the matching relationship between the tapered sleeve 122 and the parking arm 132 is also different. The method comprises the following specific steps:

when the ratchet wheel 133 and the tapered sleeve 122 are respectively located on the opposite sides of the parking arm 131, if the tapered sleeve 122 slides along the guide shaft 121 until the abutting portion 1312 abuts against the side wall of the end of the tapered sleeve 122 with the larger outer diameter, the parking tooth 1311 is engaged with the parking groove 1331; when the tapered sleeve 122 slides along the guide shaft 121 until the abutting portion 1312 abuts against or aligns with the side wall of the end of the tapered sleeve 122 having a smaller outer diameter, the parking tooth 1311 is disengaged from the parking groove 1331. At this time, the elastic member 132 provides an unlocking force for the parking arm 131 to disengage the parking tooth 1311 from the parking groove 1331.

When the ratchet wheel 133 and the tapered sleeve 122 are located on the same side of the parking arm 131, the tapered sleeve 122 slides along the guide shaft 121 until the abutment portion 1312 abuts against the side wall of the end of the tapered sleeve with the larger outer diameter, and the parking tooth 1311 is separated from the parking groove 1331; the tapered sleeve 122 slides along the guide shaft 121 until the abutment portion 1312 abuts against or aligns with the side wall of the end of the tapered sleeve 122 having a smaller outer diameter, and the parking tooth 1311 engages with the parking groove 1331. At this time, the elastic member 132 provides a locking force for the parking arm 132 to engage the parking tooth 1311 with the parking groove 1331.

Therefore, during the operation of the parking driving mechanism 100, the parking driver 110 drives the tapered sleeve 122 to slide along the guide shaft 121, and the parking arm 131 rotates after overcoming the elastic force provided by the elastic member 132, so as to drive the parking tooth 1311 to move in the direction toward the ratchet wheel 133 until the parking tooth 1311 is engaged with the parking groove 1331, so as to implement the parking lock function; the parking actuator 110 drives the tapered sleeve 122 to slide along the guide shaft 121, and the parking arm 131 allows the elastic member 132 to rotate after releasing the elastic force, so as to drive the parking tooth 1311 to move in a direction away from the ratchet wheel 133 until the parking tooth 1311 is separated from the parking slot 1331, so as to achieve the parking unlocking function.

Therefore, the parking driving mechanism 100 can realize the parking lock function and the parking unlock function only by the parking arm 131 being respectively matched with the tapered sleeve 122 and the elastic member 132 having different outer diameters at both ends. Therefore, the parking drive mechanism 100 has a simple structure and low manufacturing cost.

In this embodiment, the tapered sleeve 122 is conical. The abutment 1312 is a circular arc shaped groove. Therefore, when the abutting portion 1312 is in slidable abutment with the side wall of the tapered sleeve 122, the tapered sleeve 122 is slidably inserted into the groove, so that the structure is more stable when the abutting portion 1312 is in abutment with the side wall of the tapered sleeve 122. Referring also to fig. 3, in the present embodiment, the tapered sleeve 122 includes a large end 1221, a small end 1222, and a tapered transition 1223 connecting between the large end 1221 and the small end 1222. The large end 1221 and the small end 1222 are both cylindrical hollow cylindrical structures.

Thus, the outer diameters of the large end 1221 and the small end 1222 do not change in the axial direction of the guide shaft 121. Therefore, the large end 1221 and the small end 1222 are both provided as cylindrical hollow cylindrical structures, when the taper sleeve slides to the abutting part and the large end 1221 or the abutting part 1312 to abut, a larger contact area is provided between the side wall of the large end 1221 or the small end 1222 and the abutting part 1312, so that the abutting part 1312 and the large end 1221 or the small end 1222 are more stably abutted, the structure of the parking drive mechanism 100 in the parking lock state and the parking unlock state is further stabilized, and the parking stability of the parking drive mechanism 100 is effectively improved.

Referring to fig. 1 again, in the present embodiment, the transmission assembly 120 further includes a screw 123 and a transmission nut 124 sleeved on the screw 123 and in threaded connection with the screw 123. The parking actuator 110 is drivingly connected to the threaded rod 123 and drives the lower lever to rotate. The central axis of the screw 123 is axially parallel to the central axis of the guide shaft 121. The drive nut 124 is drivingly connected to the tapered sleeve 122.

When the parking driver 110 drives the screw 123 to rotate forward, the transmission nut 124 drives the tapered sleeve 122 to slide along the guide shaft 121 until the abutting portion 1312 abuts against or aligns with a side wall of one end of the tapered sleeve 122; when the parking actuator 110 drives the screw 123 to rotate in the opposite direction, the transmission nut 124 drives the tapered sleeve 122 to slide along the guide shaft 121 until the abutting portion 1312 abuts against the side wall of the other end of the tapered sleeve 122. Therefore, the parking actuator 110 drives the screw rod 123 to rotate, and the transmission nut 124 is driven by the screw rod 123 to move along the axial direction of the screw rod 123, so that the transmission assembly 120 converts the rotation assistance transmitted by the parking actuator 110 into the translation assistance.

Further, in the present embodiment, the transmission assembly 120 further includes a first baffle 125 and a second baffle 126 disposed opposite to each other. The first baffle 125 and the second baffle 126 are fixed to both ends of the driving nut 124, respectively. The ends of the first baffle 125 and the second baffle 126 away from the transmission nut 124 are slidably sleeved on the guide shaft 121. The tapered sleeve 122 is located between the first baffle 125 and the second baffle 126. The first baffle 125 and the second baffle 126 may be straight plates or may be bent plates according to actual requirements.

When the parking actuator 110 drives the screw 123 to rotate and move the transmission nut 124 along the small end 1222 toward the large end 1221, the second blocking plate 126 fixed on the transmission nut 124 will push the tapered sleeve 122 to slide along the small end 1222 toward the large end 1221; when the parking actuator 110 drives the screw 123 to rotate and move the transmission nut 124 in a direction from the large end 1221 to the small end 1222, the first stop plate 125 fixed to the transmission nut 124 pushes the tapered sleeve 122 to slide in a direction from the large end 1221 to the small end 1222. Thus, the first and

second shutters

125 and 126 are provided to transmit power from the transmission nut 124 to the tapered sleeve 122. Moreover, due to the arrangement of the first baffle 125 and the second baffle 126, the transmission connection structure between the transmission nut 124 and the conical sleeve 122 is simpler.

Further, in the present embodiment, one end of the tapered sleeve 122 is provided with a spring 127 to provide a driving force for the tapered sleeve 122 to slide the tapered sleeve 122 along the guide shaft 121. Due to the arrangement of the spring 127, the flexible connection between the conical sleeve 122 and the transmission nut 124 can be realized, the situation that the transmission nut 124 and the screw 123 are clamped due to the rigid connection between the conical sleeve 122 and the transmission nut 124 is avoided, and the reliability of the parking driving mechanism 100 is effectively improved. Moreover, the spring 127 can also provide the tapered sleeve 122 with a pushing force directed by the first baffle 125 to the second baffle 126, so that the tapered sleeve 122 can slide along the direction in which the first baffle 125 is directed to the second baffle 126.

Referring to fig. 1 again, in the present embodiment, the parking tooth 1311 is disposed on a side of the parking arm 131 opposite to the abutting portion 1312. Therefore, the ratchet wheel 133 and the conical sleeve 122 are respectively arranged on two opposite sides of the parking arm 131, so that the layout of parts in the parking driving mechanism 100 is more reasonable, the interference between the ratchet wheel 133 and the conical sleeve 122 in the working process can be avoided, and the reliability of the parking driving mechanism 100 is improved. Specifically, when the abutment portion 1312 abuts against the outer wall of the large end 1221, the parking tooth 1311 engages with the parking groove 1331; when the abutment 1312 abuts or aligns with the outer wall of the small end 1222, the parking tooth 1311 disengages from the parking slot 1331.

A side of the second shutter 126 adjacent to the parking arm 132 is provided with a paddle 128. The finger 128 and the parking arm 132 are engageable to provide a force to disengage the parking tooth 1311 from the parking slot 1331 for the parking tooth 1311 engaged in the parking slot 1331.

When a vehicle such as an automobile is used, it is inevitable that parking is required on a slope, and at this time, a large frictional force exists between the parking tooth 1311 engaged in the parking groove 1331 and the parking groove 1331, so that attraction is formed between the parking tooth 1311 and the parking groove 1331, and there is a high possibility that the parking tooth 1311 cannot be completely separated from the parking groove 1331 during the parking and unlocking.

Thus, when a vehicle such as an automobile parked on a slope is unlocked to park, the parking driver 110 drives the tapered sleeve 122 to slide in the direction from the large end 1221 to the small end 1222 until the abutting portion 1312 slides to the small end 1222, and at this time, the pusher 128 touches the parking arm 131, so that the parking tooth 1311 engaged in the parking groove 1331 is loosened with respect to the parking groove 1331, and is released from the parking groove 1331, thereby enabling the parking drive mechanism 100 to achieve a function of unlocking to park. Therefore, the arrangement of the shifting block 128 effectively ensures that the parking driving mechanism 100 has enough unlocking capability during parking, and improves the reliability of the parking driving mechanism 100.

In the present embodiment, a mounting through hole 1313 is opened in the middle of the parking arm 131. The park assembly 130 also includes a park axle 134. The parking shaft 134 is rotatably inserted through the mounting through hole 1313. The elastic member 132 is attached to an end of the parking arm 131 remote from the parking tooth 1311, and is located on a side of the parking arm 131 where the abutting portion 1312 is provided.

Therefore, the parking shaft 134 is arranged in the middle of the parking arm 131, the elastic piece 132 and the parking teeth 1311 are arranged at two ends of the parking arm 131, the distance between a stress point and a fulcrum on the parking arm 131 is effectively reduced, the probability of the situations of breakage, bending and the like of the parking arm 131 is greatly reduced, and the layout of the parking assembly 130 in the shell is more reasonable.

In the present embodiment, the outer cylindrical surface of the ratchet wheel 133 is provided with a plurality of parking grooves 1331 at intervals in the circumferential direction. The ratchet wheel 133 is rotatable about its central axis. Thus, when the parking lock function of the parking drive mechanism 100 needs to be implemented, the ratchet wheel 133 may be rotated so that the parking tooth 1311 is engaged in the closest parking groove 1331. Therefore, the provision of the plurality of parking grooves 1331 makes the parking lock operation of the parking drive mechanism 100 more convenient.

In the present embodiment, the parking actuator 110 is a parking motor having a motor shaft. The motor shaft is in driving connection with the conical sleeve 122. Thus, the parking motor provides a driving force for the axial sliding of the tapered sleeve 122 along the guide shaft 121.

Specifically, when the transmission assembly 120 includes a screw 123 and a transmission nut 124 threadedly coupled to the screw 123, the motor shaft is drivingly coupled to the screw 123. Thus, the parking motor provides a driving force for the rotation of the screw 123.

Further, in the present embodiment, the motor shaft and the screw 123 are integrally formed. Therefore, the motor shaft and the screw rod 123 form a whole, and the transmission precision between the motor shaft and the screw rod 123 is effectively ensured.

In the parking drive mechanism 100, under the elastic force provided by the elastic member 132, the parking arm 131 rotates to drive the parking tooth 1311 to move in the direction toward the tapered sleeve 122. Further, the parking actuator 110 drives the tapered sleeve 122 to slide along the guiding shaft 121, and the parking arm 131 rotates after overcoming the elastic force provided by the elastic member 132, so as to drive the parking tooth 1311 to move in the direction toward the ratchet wheel 133 until the parking tooth 1311 is engaged with the parking slot 1331, thereby implementing the parking lock function; the parking driver 110 drives the taper sleeve 122 to slide along the guide shaft 121, and the parking arm 131 allows the elastic member 132 to release the elastic force and then rotate, so as to drive the parking tooth 1311 to move in a direction away from the ratchet wheel 133 until the parking tooth 1311 is separated from the parking slot 1331, and thus the parking unlocking function can be achieved. Therefore, the parking driving mechanism 100 can realize the parking lock function and the parking unlock function only by the parking arm 132 being respectively matched with the tapered sleeves 122 and the elastic members 132 having different outer diameters at both ends. Therefore, the parking drive mechanism 100 has a simple structure and low manufacturing cost.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. A parking drive mechanism, comprising:

a parking drive;

a parking assembly, comprising:

the conical sleeve slides along the guide shaft, and the parking arm rotates after overcoming the elastic force provided by the elastic piece until the parking tooth is clamped with the parking groove; or the conical sleeve slides along the guide shaft, and the parking arm allows the elastic piece to release the elastic force and then rotates until the parking tooth is separated from the parking groove.

2. The parking drive mechanism according to claim 1, wherein the tapered sleeve is conical, and the abutting portion is a recess in the shape of a circular arc.

3. The parking drive mechanism according to claim 1, wherein the tapered sleeve comprises a large end, a small end and a transition section which is connected between the large end and the small end and is tapered, and the large end and the small end are both cylindrical hollow cylindrical structures.

4. The parking driving mechanism according to claim 1, wherein the transmission assembly further includes a screw and a transmission nut sleeved on the screw and in threaded connection with the screw, the parking driving member is in transmission connection with the screw and drives the screw to rotate, a central axis of the screw is parallel to a central axis of the guide shaft, and the transmission nut is in transmission connection with the tapered sleeve.

5. The parking driving mechanism according to claim 4, wherein the transmission assembly further includes a first blocking plate and a second blocking plate disposed opposite to each other, the first blocking plate and the second blocking plate are respectively fixed at two ends of the transmission nut, one ends of the first blocking plate and the second blocking plate, which are far away from the screw rod, are slidably sleeved on the guide shaft, and the tapered sleeve is located between the first blocking plate and the second blocking plate.

6. The parking drive mechanism according to claim 5, wherein the parking tooth is disposed on a side of the parking arm opposite to the abutting portion, a shifting block is disposed on a side of the second stopper close to the parking arm, and the shifting block and the parking arm are in contact with each other to provide an acting force for releasing the parking tooth from the parking slot.

7. The parking drive mechanism according to claim 5, wherein one end of the tapered sleeve is provided with a spring to provide the tapered sleeve with a driving force to slide the tapered sleeve along the guide shaft.

8. The parking drive mechanism of claim 4, wherein the drive member is a parking motor having a motor shaft drivingly connected to the screw.

9. The parking drive mechanism of claim 8, wherein the motor shaft is of an integrally formed construction with the screw.

10. The parking drive mechanism according to claim 1, wherein a mounting through hole is formed in a middle portion of the parking arm, the parking assembly further comprises a parking shaft rotatably inserted through the mounting through hole, and the elastic member is mounted at an end of the parking arm away from the parking teeth.