CN216478867U - Parking mechanism and vehicle - Google Patents

Abstract

The utility model provides a parking mechanism and a vehicle, wherein the parking mechanism comprises a parking gear shifting shaft assembly, a parking arm and a parking gear, the parking gear shifting shaft assembly is arranged in a gearbox and comprises a parking gear shifting shaft, a parking pawl and a parking cam, the parking cam is rotatably arranged on the parking gear shifting shaft and provided with a butting part, an elastic part is arranged between the parking cam and the parking pawl, the parking cam bears the elastic pretightening force of the elastic part, and the butting part can be butted against one end of the parking arm; the parking arm is pivoted in the gearbox and is correspondingly provided with an elastic reset piece, one end of the parking arm, which is abutted against the abutting part, is provided with an abutting end surface and an abutting and pushing matching end surface, the abutting part enters the abutting and pushing matching end surface from the abutting end surface along with the rotation of the parking pawl, and the abutting and pushing arm rotates to enable the other end of the parking arm to be meshed with the parking gear. The parking mechanism disclosed by the utility model is simple in structure, accurate and stable in power transmission, and can effectively avoid the risks of parking clamping stagnation and deadlocking.

Description

Parking mechanism and vehicle

Technical Field

The utility model relates to the technical field of new energy automobiles, in particular to a parking mechanism. The utility model also relates to a vehicle provided with the parking mechanism.

Background

The parking mechanism increases the weight, cost, volume and complexity of the transmission while performing functions, and the space for disposing the parking mechanism is greatly limited when it is required to reduce these characteristics of the transmission. In the prior art, three driving modes of mechanical parking, motor parking and hydraulic parking are provided in the automatic transmission parking mechanism, the motor parking mechanism replaces a manual operation part with motor driving on the traditional mechanical parking mechanism, and the automatic transmission parking mechanism is simple in mechanism and flexible in arrangement. However, because the existing motor parking mechanism is unreasonable in structural design, the occupied space is large when the motor parking mechanism is installed in a transmission, the motor parking mechanism cannot be in a modularized design, and the motor parking mechanism is extremely difficult to mount in a new energy reducer.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention is directed to a parking mechanism, which can improve the safety and reliability of parking.

In order to achieve the purpose, the technical scheme of the utility model is realized as follows:

a parking mechanism comprises a parking shift shaft assembly, a parking arm and a parking gear, wherein the parking shift shaft assembly, the parking arm and the parking gear are arranged in a gearbox;

the parking gear shifting shaft assembly comprises a parking gear shifting shaft rotatably arranged in the gearbox, a parking pawl fixedly connected to the parking gear shifting shaft and a parking cam rotatably arranged on the parking gear shifting shaft, an elastic piece is arranged between the parking cam and the parking pawl, a butting part is arranged on the parking cam and bears the elastic pre-tightening force of the elastic piece, and the butting part can be butted against one end of the parking arm;

the parking arm is pivoted in the gearbox and is provided with an elastic resetting piece corresponding to the parking arm, one end of the parking arm, abutted against the abutting part, is provided with an abutting end face and an abutting matching end face connected with the abutting end face, and rotates along with the parking pawl, the abutting part enters the abutting matching end face from the abutting end face and can abut against and push the parking arm to rotate, so that the other end of the parking arm is meshed with the parking gear.

Further, the axis of the parking shift shaft is disposed coplanar with a center plane in the thickness direction of the parking gear.

Further, the abutting portion includes a projection configured on a side of the parking cam; and a latch is formed on the parking arm and pushes against the parking arm along with the bump, and the latch can be meshed with the parking gear.

Further, one end of the lug, which is abutted against the parking arm, is arc-shaped, and the abutting end face is configured to be an inclined plane.

Furthermore, the parking arm is rotatably arranged in the gearbox through a pin shaft, the elastic reset piece is a first torsion spring sleeved on the pin shaft, and two ends of the first torsion spring are respectively connected with the parking arm and the gearbox.

Furthermore, the elastic part is located for the cover the epaxial second torsional spring of parking gearshift, the both ends of second torsional spring respectively with the parking pawl with the parking cam links to each other.

Furthermore, the parking cam is located one side of the parking pawl, the parking pawl and the abutting portion are respectively provided with a first connecting portion and a second connecting portion, and two ends of the second torsion spring are respectively inserted into the first connecting portion and the second connecting portion.

Furthermore, be equipped with spacing post on the butt portion, second connecting portion locate on the spacing post, and for being equipped with the one end of first connecting portion, the other end of parking pawl is equipped with spacing terminal surface, spacing post butt in on the spacing terminal surface.

Compared with the prior art, the utility model has the following advantages:

according to the parking mechanism, the abutting part arranged on the parking cam enters the abutting matching end face from the abutting end face, so that the parking cam abuts against one end of the parking arm and drives the parking arm to rotate, the other end of the parking arm is meshed with the parking gear, and therefore parking can be reliably carried out.

In addition, the axis of the parking gear shifting shaft and the central plane in the thickness direction of the parking gear are arranged in a coplanar manner, so that the parking mechanism is compact in overall structure and small in required arrangement space.

Another object of the present invention is to provide a vehicle having a parking mechanism as described above in a transmission, and a rotary drive unit connected to one end of the parking shift shaft in the vehicle.

Further, the rotation driving part adopts a motor.

The vehicle of the present invention and the parking mechanism as described above have the same beneficial effects compared with the prior art, and are not described in detail herein.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation of the utility model. In the drawings:

fig. 1 is a schematic structural diagram of a motor parking mechanism according to a first embodiment of the utility model;

fig. 2 is an exploded view of the motor parking mechanism according to the first embodiment of the present invention;

fig. 3 is a schematic structural view of the parking shift shaft and the parking pawl according to the first embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a parking cam according to a first embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a parking arm according to a first embodiment of the present invention;

description of reference numerals:

1. a motor; 2. a parking shift shaft; 201. a transmission connecting end; 202. a housing mating end face; 203. a snap ring groove; 3. a parking pawl; 301. a first connection portion; 302. a limiting end face; 4. a gear selecting positioning seat; 5. a parking cam; 501. an abutting portion; 502. a limiting column; 5021. a second connecting portion; 503. sleeving a hole; 504. limiting the matching end face; 6. positioning blocks; 601. a pivot hole; 7. a connecting member; 8. a parking gear; 801. a locking groove; 9. a pin shaft; 10. a first torsion spring; 11. a parking arm; 1101. a rotating shaft hole; 1102. clamping teeth; 1103. an avoidance groove; 1104. abutting the end face; 1105. pushing the matching end face; 12. a second torsion spring; 121. a first mounting end; 122. a second mounting end; 13. and a clamp spring.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it should be noted that, if terms indicating orientation or positional relationship such as "upper", "lower", "inside", "outside", etc. appear, they are based on the orientation or positional relationship shown in the drawings and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms first, second, etc. in this specification are not necessarily all referring to the same item, but are instead intended to cover the same item.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connecting" are to be construed broadly unless otherwise specifically limited. For example, the connection can be fixed, detachable or integrated; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. To those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in conjunction with specific situations.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Example one

The present embodiment relates to a parking mechanism that includes a parking shift shaft assembly provided in a transmission case, a parking arm 11, and a parking gear 8, in an overall configuration, as shown in fig. 1 and 2.

Wherein, parking shift shaft subassembly is including rotating parking shift shaft 2 of locating in the gearbox, links firmly parking pawl 3 on parking shift shaft 2 to and rotate and locate parking cam 5 on parking shift shaft 2, and is equipped with the elastic component between parking cam 5 and the parking pawl 3, is equipped with butt portion 501 on the parking cam 5, and accepts the elasticity pretightning force of elastic component, butt portion 501 can the butt in the one end of parking arm 11.

The parking arm 11 is pivotally disposed in the transmission case, and an elastic reset member is disposed corresponding to the parking arm 11, and one end of the parking arm 11 abutting against the abutting portion 501 is configured with an abutting end surface 1104 and a pushing mating end surface 1105 connected to the abutting end surface 1104, and the abutting portion 501 enters the pushing mating end surface 1105 from the abutting end surface 1104 and can push the parking arm 11 to rotate along with the rotation of the parking pawl 3, so that the other end of the parking arm 11 is engaged with the parking gear 8.

The parking mechanism of this embodiment supports the one end of pushing away parking arm 11 through setting up parking gear 8 for parking arm 11 rotates, and makes the other end and the 8 meshing of parking gear of parking arm 11, thereby can reliably park, and simultaneously, this parking mechanism structure is comparatively simple, and power transmission is accurate stable, and also can effectively avoid the dead risk of parking jamming, card.

It is worth mentioning that the parking gear 8 is usually fixedly connected with the transmission input shaft or intermediate shaft or output shaft by means of splines or interference fit, thereby ensuring that the parking gear 8 can rotate synchronously when the reducer input shaft or intermediate shaft or output shaft rotates.

Specifically, as shown in fig. 1 to 4, one end of the parking shift shaft 2 is connected to a driving device outside the transmission case through a transmission connecting end 201 so as to receive the driving of the driving device for rotation. And the other end is rotatably arranged in a pivot hole 601 formed on the positioning block 6, wherein the positioning block 6 is fixedly connected in the gearbox through a connecting piece 7 in a threaded manner.

It should be noted that the driving device may be a rotary driving unit described below, and the motor 1 is preferably used as the rotary driving unit. It is of course understood that the motor 1 may also be used to drive a gear or a worm gear, which is connected to the transmission connection end 201, and the rotation of the parking shift shaft 2 may also be achieved.

The parking shift shaft 2 is also provided with a case engagement end surface 202 that engages with the transmission case. In addition, the parking pawl 3 can be fixedly connected to the parking shift shaft 2 by means of embedding, clamping or welding, and the like, one end of the parking pawl 3 is provided with a gear selection profile, the other end of the parking pawl is provided with a limiting end face 302, wherein the gear selection profile is matched and connected with a gear selection positioning seat 4 fixedly arranged on the gearbox, and the limiting end face 302 is used for being abutted against a limiting matching end face 504 on a parking cam 5.

The parking cam 5 is rotatably provided on the parking shift shaft 2 and located on one side of the parking pawl 3. Specifically, the parking cam 5 is sleeved on the parking shift shaft 2 through a sleeving hole 503 formed in the parking cam 5, is specifically located on one side of the parking pawl 3, and is arranged in a gap with the parking shift shaft 2, so that the parking cam 5 can move relative to the parking pawl 3, and is favorable for recovering to a normal parking state when mistaken engagement occurs.

In order to improve the installation effect of the parking cam 5 on the parking shift shaft 2, in this embodiment, a snap ring groove 203 is formed on the parking shift shaft 2, and the snap ring 13 embedded in the snap ring groove 203 is used for limiting the axial direction of the parking cam 5.

Furthermore, the elastic member between the parking cam 5 and the parking pawl 3 is preferably a second torsion spring 12 sleeved on the parking shift shaft 2, and both ends of the second torsion spring 12 are connected with the parking pawl 3 and the parking cam 5, respectively. The parking cam 5 is configured with an abutting portion 501, and the parking cam 5 receives the elastic biasing force of the second torsion spring 12 so that the abutting portion 501 can abut on one end of the parking arm 11.

To facilitate the installation of the second torsion spring 12, with continued reference to fig. 1 to 4, the second torsion spring 12 has a main body sleeved on the parking shift shaft 2, and a first installation end 121 and a second installation end 122 provided at both ends of the main body and bent along the axial direction of the parking shift shaft 2. The parking pawl 3 is provided with a first connecting portion 301, the parking cam 5 is provided with a second connecting portion 5021, and the first mounting end 121 and the second mounting end 122 are respectively inserted into the first connecting portion 301 and the second connecting portion 5021.

The first connecting portion 301 and the second connecting portion 5021 of the present embodiment are preferably connecting holes, and of course, in addition to the connecting holes, other structural forms, such as fixing posts, are also adopted, so that the first mounting end 121 and the second mounting end 122 of the second torsion spring 12 are respectively wound and fixed on the fixing posts, and thus, the mounting and fixing of the second torsion spring 12 can also be achieved.

In order to improve the use effect, in the present embodiment, the parking cam 5 abuts against the parking pawl 3 under the elastic pretension force of the elastic member. Specifically, one end of the parking pawl 3 is provided with a limit end face 302, corresponding to the limit end face 302, the abutting portion 501 of the parking cam 5 is provided with a limit post 502, the second connecting portion 5021 is provided on the limit post 502, and for the end provided with the first connecting portion 301, the other end of the parking pawl 3 is provided with the limit end face 302, the limit post 502 abuts against the limit end face 302, that is, the limit matching end face 504 on the limit post 502 abuts against the limit end face 302.

The parking arm 11 of this embodiment is specifically disposed in the transmission case through the pin 9, and the elastic reset member is a first torsion spring 10 sleeved on the pin 9, and two ends of the first torsion spring 10 are respectively connected to the parking arm 11 and the transmission case, so as to release the parking arm. As shown in fig. 1 and fig. 2 in conjunction with fig. 5, a rotating shaft hole 1101 is formed in the middle of the parking arm 11, a pin 9 is installed in the rotating shaft hole 1101, one end of a first torsion spring 10 is clamped in an escape groove 1103 of the parking arm 11, and the other end is connected to a transmission case not shown in the figure.

Further, one end of the parking arm 11 is configured with a contact end face 1104 and a push-fit end face 1105 continuous with the contact end face 1104, and the other end of the parking arm 11 is configured with a latch 1102 for meshing with the parking gear 8. The abutting end surface 1104 abuts against and is connected with the abutting portion 501 formed on the parking cam 5, at this time, the latch 1102 at the other end of the parking arm 11 is in a non-engagement state, when the abutting portion 501 abuts against the abutting engagement portion, the parking arm 11 rotates, and at this time, the latch 1102 is latched into the lock groove 801 formed on the parking gear 8, so that the parking function is realized.

As a preferred embodiment of the present embodiment, the axis of the parking shift shaft 2 in the present embodiment is coplanar with the central plane in the thickness direction of the parking gear 8, so that the overall structure of the parking mechanism is relatively compact, and the axial arrangement space of the parking mechanism can be effectively reduced.

Further, the abutting portion 501 provided on the parking cam 5 specifically includes a projection configured on one side of the parking cam 5, and as the projection abuts against the parking arm 11, the parking arm 11 rotates, thereby enabling the latch 1102 to engage with the parking gear 8. As a further modification of the present embodiment, in the present embodiment, the end of the projection abutting against the parking arm 11 is curved, and the abutting end face 1104 is configured as an inclined face. Specifically, the abutting end face 1104 extends downwards along the pushing direction of the protruding block in an inclined manner, so that the parking cam 5 can be smoothly switched between the abutting end face 1104 and the pushing matching end face 1105, the accuracy and smoothness of power transmission can be guaranteed, good stability can be achieved, and the risk of parking jamming and jamming can be avoided.

Based on the above overall structure, when the parking mechanism of the present embodiment is used specifically, for example, when it is used in a new energy automobile, and the power source is provided by the motor 1, the specific process is as follows:

when the motor 1 receives a P-gear instruction of the whole vehicle, power is output clockwise, the power is transmitted to the parking pawl 3 through the parking shift shaft 2, and the parking cam 5 and the parking pawl 3 rotate in the same direction through the driving of the first torsion spring 10, at the moment, the abutting part 501 on the parking cam 5 enters the abutting end face 1104 to abut against the matching end face 1105, the parking arm 11 is pushed to rotate by taking the pin shaft 9 as a rotating shaft to overcome the elastic force of the second torsion spring 12, so that the latch 1102 on the parking arm 11 is meshed with the parking gear 8, and the parking is completed.

When the mistaken engagement occurs in the parking process, namely the latch 1102 on the parking arm 11 abuts against the tooth crest of the parking gear 8, at this time, the parking pawl 3 continues to rotate clockwise, but the parking cam 5 stops moving due to the fact that the parking arm 11 cannot be continuously pushed to rotate, so that the parking pawl 3 is separated from the parking cam 5, at this time, the second torsion spring 12 stores energy due to the rotation, namely, the angle change, and when the vehicle slightly rotates, namely, after the parking gear 8 rotates, the parking gear 8 pushes the parking arm 11 under the action of the elastic force accumulated by the second torsion spring 12, so that the latch 1102 is engaged with the parking gear 8.

When the motor 1 receives the finished automobile P gear releasing instruction, power is output anticlockwise, power is transmitted to the parking pawl 3 through the parking gear shifting, the parking cam 5 and the parking pawl 3 rotate in the same direction through driving of the first torsion spring 10, the abutting portion 501 of the parking cam 5 is separated from the abutting and pushing fit end face 1105, at the moment, the parking arm 11 takes the pin shaft 9 as a rotating shaft, the second torsion spring 12 releases elastic force, the latch 1102 is far away from the parking gear 8, and the parking releasing action is completed.

The parking mechanism of this embodiment is comparatively simple in structure, and structural design is compact, small in size, and required space is less, and simple to operate takes into account the cost again to do benefit to the carrying on in the new forms of energy reduction gear, power transmission is accurate stable simultaneously, can effectively avoid parking jamming, the dead risk of card, and also can improve the fail safe nature of parking.

Example two

The present embodiment relates to a vehicle in which a parking mechanism according to the first embodiment is provided in a transmission, and a rotary drive unit connected to one end of a parking shift shaft 2 is provided in the vehicle. Specifically, the motor 1 is used as the rotation driving unit.

The vehicle of this embodiment can promote the security performance of vehicle through the parking mechanism who uses embodiment one, and can guarantee that the vehicle normally traveles when relieving the parking to there is better result of use.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. A parking mechanism, its characterized in that:

the parking gear shifting mechanism comprises a parking gear shifting shaft assembly, a parking arm (11) and a parking gear (8) which are arranged in a gearbox;

the parking gear shifting shaft assembly comprises a parking gear shifting shaft (2) rotatably arranged in the gearbox, a parking pawl (3) fixedly connected to the parking gear shifting shaft (2), and a parking cam (5) rotatably arranged on the parking gear shifting shaft (2), an elastic piece is arranged between the parking cam (5) and the parking pawl (3), an abutting part (501) is arranged on the parking cam (5) and is used for bearing the elastic pre-tightening force of the elastic piece, and the abutting part (501) can abut against one end of the parking arm (11);

the parking arm (11) is arranged in the gearbox in a pivoted mode, an elastic reset piece is arranged corresponding to the parking arm (11), a butt end face (1104) is formed at one end, abutted to the butt portion (501), of the parking arm (11), a butt fit end face (1105) connected with the butt end face (1104) pushes against the parking pawl (3) to rotate, the butt portion (501) enters the butt fit end face (1105) through the butt end face (1104) and can push against the parking arm (11) to rotate, and therefore the other end of the parking arm (11) is meshed with the parking gear (8).

2. The parking mechanism according to claim 1, characterized in that:

the axis of the parking gear shifting shaft (2) and the central plane in the thickness direction of the parking gear (8) are arranged in a coplanar mode.

3. The parking mechanism according to claim 1, characterized in that:

the abutment portion (501) includes a projection configured on a side of the parking cam (5);

a latch (1102) is formed on the parking arm (11), and the latch (1102) can be meshed with the parking gear (8) along with the projection pushing against the parking arm (11).

4. The parking mechanism according to claim 3, characterized in that:

one end of the lug abutted with the parking arm (11) is arc-shaped, and the abutting end surface (1104) is configured to be an inclined surface.

5. The parking mechanism according to claim 1, characterized in that:

the parking arm (11) is rotatably arranged in the gearbox through a pin shaft (9), the elastic resetting piece is a first torsion spring (10) sleeved on the pin shaft (9), and two ends of the first torsion spring (10) are respectively connected with the parking arm (11) and the gearbox.

6. The parking mechanism according to any one of claims 1 to 5, characterized in that:

the elastic piece is located for the cover second torsional spring (12) on parking selector shaft (2), the both ends of second torsional spring (12) respectively with parking pawl (3) with parking cam (5) link to each other.

7. The parking mechanism according to claim 6, characterized in that:

the parking cam (5) is located one side of the parking pawl (3), the parking pawl (3) and the abutting portion (501) are respectively provided with a first connecting portion (301) and a second connecting portion (5021), and two ends of the second torsion spring (12) are respectively inserted into the first connecting portion (301) and the second connecting portion (5021).

8. The parking mechanism according to claim 7, characterized in that:

the parking pawl is characterized in that a limiting column (502) is arranged on the abutting portion (501), the second connecting portion (5021) is arranged on the limiting column (502), the other end of the parking pawl (3) is provided with a limiting end face (302) relative to one end of the first connecting portion (301), and the limiting column (502) abuts against the limiting end face (302).

9. A vehicle, characterized in that: the vehicle is provided with a parking mechanism according to any one of claims 1 to 8 in a transmission, and a rotary drive portion connected to one end of the parking shift shaft (2) is provided in the vehicle.

10. The vehicle according to claim 9, characterized in that: the rotary driving part adopts a motor (1).

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