CN211715747U - Parking mechanism, transmission and vehicle - Google Patents

Abstract

The utility model provides a parking mechanism, derailleur and vehicle relates to vehicle accessory technical field. The utility model discloses a parking mechanism which comprises a parking ratchet wheel and a parking pawl; the driving piece is arranged in the gearbox shell in a manner of rotating around a first axial direction; one end of the push rod is abutted against the driving piece, and the other opposite end of the push rod is provided with a pushing piece; the parking pawl is rotatably connected in the shell of the gearbox, and when the driving piece rotates to a first angular position around a first axial direction, the driving piece drives the push rod to move to a first push rod position; when the driving piece rotates to the second angular position around the first axial direction, the push rod moves to the second push rod position. The transmission comprises the parking mechanism. Wherein the vehicle is provided with the aforementioned parking mechanism or the aforementioned transmission. The utility model discloses a parking mechanism, derailleur and vehicle for it is complicated to solve current parking mechanism structure, the technical problem of the inconvenient installation of spare part.

Description

Parking mechanism, transmission and vehicle

Technical Field

The utility model relates to a vehicle accessory technical field specifically is a parking mechanism, derailleur and vehicle.

Background

At present, some automatic gearboxes and speed reducers are integrated with parking mechanisms, and the parking mechanisms enable automobiles to be static and incapable of rolling on a plane or a road surface with a certain gradient. Different from a hand brake, the parking mechanism directly stops the gear in the gearbox, so that the parking safety of the automobile with the parking mechanism is greatly improved.

However, the existing parking mechanism usually adopts a worm and gear matching mode, the push rod is driven to move by the rotation of the worm gear, the worm and gear structure is complex, the installation requirement is high for ensuring the accurate matching of the worm and gear, and the space occupied by the worm gear is large because the rotating axis of the worm gear is vertical to the moving direction of the push rod, so that the difficulty is caused for the arrangement and installation of other parts.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides a parking mechanism, derailleur and vehicle for it is complicated to solve current parking mechanism structure, the technical problem of the inconvenient installation of spare part.

In a first aspect, the present invention provides a parking mechanism, including:

a parking ratchet and a parking pawl;

the driving piece is arranged in the gearbox shell in a manner of rotating around a first axial direction;

one end of the push rod is abutted against the driving piece, and the other opposite end of the push rod is provided with a pushing piece;

the parking pawl is rotatably connected in the shell of the gearbox, and when the driving piece rotates to a first angle position around a first axial direction, the driving piece drives the push rod to move to the pushing piece along the first axial direction so as to push the parking pawl to a first push rod position meshed with the parking ratchet wheel; when the driver rotates in the first axial direction to a second angular position, the push rod moves in the first axial direction to a second push rod position where the ejector disengages the parking pawl from the parking ratchet.

Preferably, when the driving member rotates to the first angular position, the part of the driving member abutting against the push rod is located at a first position along the first axial direction corresponding to the first push rod position; when the driving piece rotates to the second angular position, the part of the driving piece, which is abutted to the push rod, is located at a second position, corresponding to the second push rod position, along the first axial direction.

Preferably, a guide groove recessed towards a direction away from the push rod is formed in the driving piece, one end of the push rod abuts against the guide groove, when the driving piece rotates to a first angular position, a part, abutted against the push rod, of the guide groove is located at a first position along a first axial direction, and when the driving piece rotates to a second angular position, a part, abutted against the push rod, of the guide groove is located at a second position along the first axial direction.

Preferably, the projection of the guide groove on a plane perpendicular to the first axial direction is a circular ring shape, the guide groove includes a first guide section whose projection position in the first axial direction is located at the first position, a second guide section whose projection position in the first axial direction is located at the second position and a transition section whose projection position in the first axial direction gradually transits from the second position to the first position, one end of the projection position of the transition section in the first axial direction located at the first position is connected with the first guide section, and the other opposite end is connected with the second guide section.

Preferably, the vertical distance between the surface of the ejector for ejecting the parking pawl and the axis of the push rod is gradually reduced along the moving direction of the push rod during the ejection.

Preferably, the pushing piece is a cam, the surface of the cam, which is contacted with the parking pawl during pushing, is a conical surface, and the conical surface gradually reduces along the moving direction of the push rod during pushing.

Preferably, the parking mechanism further comprises a drive spring, and when the push rod moves to the first push rod position along the first axial direction, the drive spring is in a state of pressing the pushing piece to be tightly compressed.

Preferably, the parking mechanism further comprises a return spring, one end of the return spring is fixedly connected with the gearbox shell, the other end of the return spring is fixedly connected with the parking pawl, the return spring is in a state of being compressed by the parking pawl to generate elastic deformation when the parking mechanism is in a parking state, and when the parking state is released, the return spring is in a state of recovering the elastic deformation to separate the parking pawl from the parking ratchet wheel.

In a second aspect, the present invention provides a transmission comprising the parking mechanism of the first aspect.

In a third aspect, the present invention provides a vehicle provided with the parking mechanism of the first aspect or the transmission of the second aspect.

Has the advantages that: the utility model discloses a parking mechanism, derailleur and vehicle utilize the rotation of driving piece to drive the push rod along rectilinear movement to drive the top and push away the piece with the parking pawl push into with parking ratchet wheel meshing's position, perhaps drive parking pawl and parking ratchet wheel separation, adopted worm gear complex structure before having saved, make parking mechanism's structure simpler. The rotating axis of the driving part is parallel to the moving direction of the push rod, so that the driving part and the push rod can be arranged in a staggered mode in space, the size of the driving part and the length of the push rod can be freely designed according to the size of the inner space, and arrangement and installation of other parts of the parking mechanism are facilitated.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings required to be used in the embodiments of the present invention will be briefly described below, and for those skilled in the art, without creative efforts, other drawings can be obtained according to these drawings, and these drawings are all within the protection scope of the present invention.

Fig. 1 is a three-dimensional structure diagram of the parking mechanism of the present invention in a parking state;

fig. 2 is a front view of the parking mechanism of the present invention in a parking state;

fig. 3 is a top view of the parking mechanism of the present invention in a parking state;

FIG. 4 is a three-dimensional structure diagram of the parking mechanism of the present invention in a parking releasing state;

fig. 5 is a front view of the parking mechanism of the present invention in a parking release state;

fig. 6 is a plan view of the parking mechanism according to the present invention in a parking release state;

fig. 7 is a schematic structural view of the guide groove of the present invention;

fig. 8 is a schematic view of the pushing member of the present invention using a wedge;

parts and numbering in the drawings: the parking ratchet 10, the parking pawl 20, the push rod 30, the driving member 40, the first guide section 41, the second guide section 42, the third guide section 43, the pushing member 50, the conical surface 60, the driving spring 70, the return spring 80 and the pin shaft 90.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. In case of conflict, the various features of the embodiments and examples of the present invention may be combined with each other and are within the scope of the present invention.

Example 1:

as shown in fig. 1, the present embodiment provides a parking mechanism including a parking ratchet 10, a parking pawl 20, a driver 50, and a push rod 30. Wherein the parking ratchet 10 is in driving connection with the transmission, for example the parking ratchet 10 is mounted on one of the shafts of the gearbox. The parking ratchet wheel 10 is matched with the parking pawl 20 for use, the parking ratchet wheel 10 is provided with ratchet teeth, and when one part of the parking pawl 20 is clamped between two adjacent ratchet teeth of the parking ratchet wheel 10 and meshed with the parking ratchet wheel 10, the parking ratchet wheel 10 is clamped by the parking pawl 20 and cannot rotate. Because the transmission is in transmission connection with the parking ratchet wheel 10, when the ratchet wheel is clamped by the parking pawl 20, the output shaft of the transmission cannot rotate, and therefore the parking function is achieved. After the parking pawl 20 is separated from the parking ratchet wheel 10, the parking ratchet wheel 10 can rotate freely, the constraint between the parking ratchet wheel 10 and the transmission output shaft is also released, at the moment, the vehicle can move, and the parking state is released. It is the cooperation of the driver 50, the push rod 30 and the parking pawl 20 that is used in the present embodiment to drive the parking pawl 20 to engage or disengage the parking ratchet 10 accurately and reliably so that the parking mechanism can be placed in or released from the parking state and switched between the two states.

Wherein the driver 50 is rotatably arranged in the gearbox housing about a first axial direction; the driver 50 may be engaged with the parking motor, for example, by drivingly connecting the driver 50 to an output shaft of the parking motor. The driving member 50 is rotated by the parking motor. One end of the push rod 30 is abutted with the driving piece 50, and the other opposite end is provided with an ejecting piece; the parking pawl 20 is rotatably connected in the transmission housing, as shown in fig. 2 and 3, when the driving member 50 rotates to a first angular position around a first axial direction, the driving member 50 drives the push rod 30 to move along the first axial direction to a position where the pushing member pushes the parking pawl 20 to the first push rod 30 engaged with the parking ratchet 10; as shown in fig. 4 and 5, when the driver 50 rotates in the first axial direction to the second angular position, the push rod 30 moves in the first axial direction to a second push rod 30 position where the ejector may disengage the parking pawl 20 from the parking ratchet 10.

The first axial direction is the axial direction of the driving member 50 when rotating, and the moving direction of the push rod 30 is parallel to the axial direction. When the driving member 50 rotates around the first axial direction, the driving member 50 rotates and drives the push rod 30 to move along the first axial direction. The ejector provided on the push rod 30 also moves in the first axial direction together with the push rod 30. The ejector moves and pushes the parking pawl 20 to rotate toward the parking ratchet 10. When the driving member 50 rotates to a specific angle, i.e. the first angular position, the push rod 30 is also driven by the driving member 50 to have a corresponding first push rod 30 position. The ejector is also moved with the push rod 30 to a corresponding specific position where the ejector can push the parking pawl 20 to rotate to a position where it engages with the parking ratchet 10. When the driver 50 rotates to another angular position, i.e. the aforementioned second angular position, the push rod 30 moves to the second push rod 30 position along with the rotation of the driver 50, and the surface of the ejector provided on the push rod 30 for ejecting the parking pawl 20 is also away from the parking ratchet 10 along with the movement of the push rod 30, so that the parking pawl 20 can be separated from the parking ratchet 10, thereby achieving the release of the parking state.

The parking mechanism of the embodiment utilizes the rotation of the driving element 50 to drive the push rod 30 to move along a straight line, so as to drive the pushing element to push the parking pawl 20 into a position meshed with the parking ratchet wheel 10, or drive the parking pawl 20 to be separated from the parking ratchet wheel 10, thereby omitting a complex structure adopting worm and gear matching in the prior art, and enabling the structure of the parking mechanism to be simpler. Because the rotation axis of the driving element 50 is parallel to the moving direction of the push rod 30, the driving element 50 and the push rod 30 can be arranged in a staggered mode in space, the size of the driving element 50 and the length of the push rod 30 can be freely designed according to the size of the inner space, and arrangement and installation of other parts of the parking mechanism are facilitated.

Specifically, as shown in fig. 2, when the driving member 50 rotates to the first angular position, the portion of the driving member 50 abutting against the push rod 30 is located at a first position along the first axial direction corresponding to the position of the first push rod 30; as shown in fig. 5, when the driver 50 rotates to the second angular position, the portion of the driver 50 abutting the push rod 30 is located at a second position in the first axial direction corresponding to the position of the second push rod 30.

Since the position of the driver 50 in abutment with the push rod 30 changes with the rotation of the driver 50, the present embodiment sets the position of the portion of the driver 50 in abutment with the push rod 30 during rotation in the first axial direction. When the driving member 50 is rotated to the first angular position, the position where the driving member 50 abuts against the push rod 30 can drive the push rod 30 to the first push rod 30 position, and when the driving member 50 is rotated to the second angular position, the position where the driving member 50 abuts against the push rod 30 can drive the push rod 30 to the second push rod 30 position.

The setting method specifically comprises the following steps: the driving member 50 is provided with a guide groove recessed towards the direction departing from the push rod 30, one end of the push rod 30 abuts against the guide groove, when the driving member 50 rotates to a first angular position, the part of the guide groove abutting against the push rod 30 is located at a first position along the first axial direction, and when the driving member 50 rotates to a second angular position, the part of the guide groove abutting against the push rod 30 is located at a second position along the first axial direction.

The present embodiment uses a guide groove as the driving member 50, and one end of the push rod 30 is constrained in the guide groove, and when the driving member 50 rotates around the first axial direction, the push rod 30 moves along the axial direction accurately and reliably under the constraint of the guide groove.

Wherein the structural style of guide way is: the projection of the guide groove on the plane perpendicular to the first axial direction is a circular ring shape, the guide groove comprises a first guide section 41, the projection position of which in the first axial direction is located at the first position, a second guide section 42, the projection position of which in the first axial direction is located at the second position, and a transition section, the projection position of which in the first axial direction is gradually transited from the second position to the first position, one end, located at the first position, of the projection position of the transition section in the first axial direction is connected with the first guide section 41, and the other opposite end is connected with the second guide section 42.

The operation of the parking mechanism when the guide groove is used as the driver 50 will be described below by taking the parking mechanism in fig. 2 and 5 as an example. The height direction (direction a indicated by an arrow in the drawing) in the drawing is the first axial direction, the guide groove is rotated in this direction by the parking motor, the angular position of the guide groove (corresponding to the angle of rotation of the guide groove) is also constantly changed during the rotation, and the position where the guide groove abuts against the push rod 30 is also changed by the rotation of the guide groove. In this regard, the height position of the contact portion of the guide groove and the push rod 30 during the rotation process (i.e. the projection position of the guide groove in the first axial direction) may be designed, so that the height of the contact portion of the guide groove and the push rod 30 during the rotation process of the guide groove to the first angular position gradually rises to push the push rod 30 upwards, so that the push rod 30 drives the pushing member to move upwards. The push rod 30 rotates the parking pawl 20 while the push member moves with the push rod 30 until the push member pushes the parking pawl 20 into a position recessed in engagement with the parking ratchet 10, at which time the push rod 30 is just in the position of the first push rod 30 and the guide groove is just in the first angular position. Then the guide groove continues to rotate, the height of the contact part of the guide groove and the push rod 30 is gradually reduced in the rotating process, the push rod 30 is also lowered along with the contact part, and the pushing piece is driven to descend. When the pusher is lowered to a certain position, the parking pawl 20 can be disengaged from the parking ratchet 10, the push rod 30 is in the second position and the guide groove is in the corresponding second angular position.

The placing direction of the parking mechanism of the present application is not limited to the direction shown in fig. 2 or fig. 5, and may be set to other directions according to the use situation (i.e. the first axial direction may be other directions than the high direction in fig. 2 and fig. 5) in specific implementation as long as the relative position relationship of the components of the parking mechanism is ensured to meet the aforementioned requirement.

As shown in fig. 7, as one preferred example, the projection of the guide groove on a plane perpendicular to the first axial direction is a circular ring shape, the guide groove includes a first guide section 41 whose projection position in the first axial direction is located at a first position, a second guide section 42 whose projection position in the first axial direction is located at a second position, and a transition section whose projection position in the first axial direction gradually transits from the second position to the first position, and one end of the projection position of the transition section in the first axial direction located at the first position is connected to the first guide section 41, and the other end thereof is connected to the second guide section 42.

Since the guide slot is a three-dimensional structure, we can project the three-dimensional structure in the aforementioned plane and the first axial direction, respectively. Because the projection of the guide groove on the plane vertical to the first axial direction is a circular ring shape, the radial positions of the guide groove at all angles are the same, so that the push rod 30 can be ensured to be accurately positioned in the guide groove no matter which angular position the guide groove rotates in the rotating process of the guide groove. Further, the present embodiment divides the guide groove into three portions, a first guide section 41, a second guide section 42, and a third guide section 43, which are different in projection position in the axial direction (i.e., different in height position in fig. 2). The projection position of the first guide section 41 in the axial direction is the first position, the projection position of the second guide section 42 in the axial direction is the second position, and the position of the third guide section 43 in the axial direction is between the first position and the second position. The guide grooves are formed such that the push rod 30 is in contact with the three portions during rotation, respectively. For example, when the front guide groove is rotated to a position (i.e., a second angular position) where the push rod 30 contacts the second guide section 42, and the push rod 30 is located at the second push rod 30 position, the parking pawl 20 may be disengaged from the parking ratchet 10, and the parking mechanism is in the parking release state. At this time, if the guide groove continues to rotate, the contact portion of the push rod 30 with the guide groove enters the third guide section 43 from the second guide section 42, the push rod 30 is gradually pushed by the guide groove from the position of the second push rod 30 to the position of the first push rod 30 during the contact with the third guide section 43, and the contact portion of the push rod 30 with the guide groove also guides the first guide section 41 by the third guide section 43. Since the present embodiment provides the third guide section 43 to transition between the first guide section 41 and the second guide section 42, the push rod 30 can be stably and reliably moved during the switching between the parking state and the parking release state. The angle ranges corresponding to the three guide sections may be designed according to actual use requirements, for example, the angle range corresponding to the first guide section 41 may be set to be larger to ensure that the push rod 30 can be reliably pushed to the position of the first push rod 30, or the position change rate of the vicinity of the joint position of the third guide section 43 and the first guide section 41 or the second guide section 42 along the first axial direction is smaller, so that the push rod 30 can be smoothly transited when entering the position of the first push rod 30 and the position of the second push rod 30.

Example 2

The present embodiment will be described in detail with respect to the arrangement in which the ejector pushes the parking pawl 20 into the engaged position during movement with the push rod 30.

The method specifically comprises the following steps: the vertical distance between the surface of the ejector for ejecting the parking pawl 20 and the axis of the push rod 30 is gradually reduced along the moving direction of the push rod 30 during the ejection.

As shown in fig. 2, when the pushing member pushes the parking pawl 20, a portion of the surface of the pushing member contacts the parking pawl 20, and when the pushing member is driven by the push rod 30 to move upward, the portion of the surface contacting the parking pawl 20 is farther from the central axis of the push rod 30 and closer to the parking ratchet 10, so that the pushing member can push the parking pawl 20 to rotate and gradually push the parking pawl 20 into the engaged position during the moving process. Conversely, as shown in fig. 5, when the push rod 30 moves the ejector downward, the portion of the surface that contacts the parking pawl 20 becomes closer to the center axis of the push rod 30 and farther from the parking ratchet 10, leaving a space for the parking pawl 20 to disengage from the parking ratchet 10.

As one example, the pushing member is a cam, and a surface of the cam contacting the parking pawl 20 at the time of pushing is a conical surface 60, and the conical surface 60 is gradually reduced in a moving direction of the push rod 30 at the time of pushing. Wherein the head with the smaller diameter of the cone is located forward of the head with the larger diameter of the cone when the push rod 30 is moved towards the position of the first push rod 30. To better mate with the conical surface 60 of the cam, the side of the parking pawl 20 facing the ejector may be provided with a circular arc shaped recess that abuts the conical surface 60 of the cam to smoothly push the parking pawl 20 into the engaged position during sliding.

As an example, a wedge fitting manner may be adopted, for example, a pair of wedges shown in fig. 8 are provided on the pusher and the parking pawl 20, and a first wedge on the pusher may push the parking pawl 20 provided with a second wedge toward the parking ratchet 10 (B direction indicated by an arrow in fig. 8) during upward movement with the pusher.

Example 3

The present embodiment is further improved on the basis of the foregoing embodiment, and the parking mechanism of the present embodiment further includes a driving spring 70 and a return spring 80, when the push rod 30 moves to the first push rod 30 position along the first axial direction, the driving spring 70 is in a state of pressing the pushing member tightly. One end of the return spring 80 is fixedly connected with the gearbox shell, the other opposite end of the return spring 80 is fixedly connected with the parking pawl 20, when the parking mechanism is in a parking state, the return spring 80 is in a state of being compressed by the parking pawl 20 to generate elastic deformation, and when the parking state is released, the return spring 80 is in a state of recovering the elastic deformation to separate the parking pawl 20 from the parking ratchet wheel 10. The parking pawl 20 can be rotatably connected to the transmission housing by a pin 90, and one end of the return spring 80 is fixedly connected to the pin 90.

In the embodiment, after the spring and the return spring 80 are added, the motor rotates to drive the guide groove to rotate, the guide groove rotates to enable the push rod 30 to move linearly, the push rod 30 moves to compress the driving spring 70, the driving spring 70 pushes the pushing piece to move, the pushing piece moves to push the parking pawl 20 to rotate, and when the vehicle speed is lower than a certain value, the parking pawl 20 is meshed with the parking ratchet wheel 10, so that the parking function is realized, and the return spring 80 is in a compressed state. When the parking state is released, the guide groove is rotated to move the push rod 30 back, at this time, the driving spring 70 is extended, the pushing piece also moves back, and the return spring 80 pushes the parking pawl 20 to be separated from the parking ratchet wheel 10, so that the process of contacting the parking state is completed.

Example 4

The embodiment provides a transmission, is equipped with aforementioned arbitrary parking mechanism in the transmission, and the transmission can obtain the arbitrary beneficial effect that the parking mechanism described above has, and it is no longer repeated here, in addition, the transmission has also obtained simple structure, the technical effect of the spare part installation of being convenient for owing to be equipped with above-mentioned parking mechanism.

Example 5

The embodiment provides a vehicle, the vehicle is provided with the parking mechanism or the transmission in any one of the above embodiments, and the vehicle may be a conventional vehicle, a new energy vehicle, a motor farm vehicle, or the like, so that the vehicle can obtain any one of the above beneficial effects of the transmission and the parking mechanism, which is not described herein again.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims (10)

1. Parking mechanism, its characterized in that includes:

a parking ratchet and a parking pawl;

the driving piece is arranged in the gearbox shell in a manner of rotating around a first axial direction;

one end of the push rod is abutted against the driving piece, and the other opposite end of the push rod is provided with a pushing piece;

the parking pawl is rotatably connected in the shell of the gearbox, and when the driving piece rotates to a first angle position around a first axial direction, the driving piece drives the push rod to move to the pushing piece along the first axial direction so as to push the parking pawl to a first push rod position meshed with the parking ratchet wheel; when the driver rotates in the first axial direction to a second angular position, the push rod moves in the first axial direction to a second push rod position where the ejector disengages the parking pawl from the parking ratchet.

2. The parking mechanism of claim 1, wherein when the driver is rotated to the first angular position, a portion of the driver abutting the push rod is located at a first position in the first axial direction corresponding to the first push rod position; when the driving piece rotates to the second angular position, the part of the driving piece, which is abutted to the push rod, is located at a second position, corresponding to the second push rod position, along the first axial direction.

3. The parking mechanism according to claim 1, wherein the actuator is provided with a guide groove recessed in a direction away from the push rod, one end of the push rod abuts against the guide groove, a portion of the guide groove abutting against the push rod is located at a first position in the first axial direction when the actuator is rotated to the first angular position, and a portion of the guide groove abutting against the push rod is located at a second position in the first axial direction when the actuator is rotated to the second angular position.

4. The parking mechanism according to claim 3, wherein a projection of the guide groove on a plane perpendicular to the first axial direction is a circular ring shape, the guide groove includes a first guide section whose projected position in the first axial direction is located at a first position, a second guide section whose projected position in the first axial direction is located at a second position, and a transition section whose projected position in the first axial direction gradually transitions from the second position to the first position, and one end of the transition section, which is located at the first position in the first axial direction, is connected to the first guide section, and the other opposite end is connected to the second guide section.

5. The parking mechanism of claim 4, wherein the ejector is configured such that a vertical distance between a surface of the ejector for ejecting the parking pawl and an axis of the push rod gradually decreases in a moving direction of the push rod at the time of ejection.

6. The parking mechanism according to claim 4, wherein the pushing member is a cam, a surface of the cam contacting the parking pawl at the time of pushing is a conical surface, and the conical surface is gradually reduced along a moving direction of the push rod at the time of pushing.

7. The parking mechanism of claim 6, further comprising a drive spring in a state of compressed abutment of the ejector when the push rod is moved in the first axial direction to the first push rod position.

8. The parking mechanism according to any one of claims 1 to 7, further comprising a return spring, wherein one end of the return spring is fixedly connected with the gearbox housing, the other opposite end of the return spring is fixedly connected with the parking pawl, the return spring is in a state of being compressed by the parking pawl to generate elastic deformation when the parking mechanism is in the parking state, and the return spring is in a state of restoring the elastic deformation to separate the parking pawl from the parking ratchet wheel when the parking state is released.

9. Transmission, characterized in that it comprises a parking mechanism according to any one of claims 1 to 8.

10. Vehicle, characterized in that it is provided with a parking mechanism as claimed in any one of claims 1 to 8, or a transmission as claimed in claim 9.

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