CN116241655A

CN116241655A - Parking structure and gearbox

Info

Publication number: CN116241655A
Application number: CN202310505741.4A
Authority: CN
Inventors: 曹世衡; 李三帅; 姜建辉; 王建鹏
Original assignee: Shengrui Transmission Co Ltd
Current assignee: Shengrui Transmission Co Ltd
Priority date: 2023-05-08
Filing date: 2023-05-08
Publication date: 2023-06-09

Abstract

The disclosure relates to the technical field of vehicle parking, in particular to a parking structure and a gearbox. This parking structure includes, installs on gearbox end cover, includes: pawl, push rod, driver and parking gear; the parking gear is coaxially connected with a transmission shaft of the gearbox; the pawl is rotationally connected with the gearbox end cover through a first elastic piece, a locking tooth extending towards the parking gear is arranged at the extending end of the pawl, and the first elastic piece is used for providing elastic force for driving the locking tooth to be far away from the parking gear; the push rod is arranged on the end cover of the gearbox in a sliding way along the direction approaching or separating from the pawl. This parking structure, pawl, push rod, driving piece among the parking structure are all installed on the gearbox end cover to experiments such as debugging, the test of whole parking structure all can be gone on the gearbox end cover, and the assembly of parking structure of also being convenient for simultaneously also, and it is to be noted that, this kind of setting up mode can make the parking structure realize modularized design.

Description

Parking structure and gearbox

Technical Field

The disclosure relates to the technical field of vehicle parking, in particular to a parking structure and a gearbox.

Background

The gearbox is an indispensable component on a traditional fuel automobile and a hybrid electric vehicle, and the gearbox parking device is a device used for parking in the gearbox. When the vehicle stops running and the driver switches the gear of the vehicle to the P gear, the gearbox parking device can start to run, and the pawl of the parking structure is clamped to the parking gear on the gearbox output shaft through the driving structure, so that the situation that the vehicle slides is avoided.

In the prior art, the driving structure, the pawl and other structures are generally respectively arranged on the gearbox end cover and other parts connected with the gearbox end cover, the whole installation is more troublesome, the whole assembly of the gearbox can be completed for testing when the parking structure is tested, and the test mode is also more complicated.

Disclosure of Invention

In order to solve the technical problem, the present disclosure provides a parking structure and a gearbox.

In a first aspect, the present disclosure provides a park structure mounted on a gearbox end cap, comprising: pawl, push rod, driver and parking gear;

the parking gear is coaxially connected with a transmission shaft of the gearbox;

the pawl is rotationally connected with the gearbox end cover through a first elastic piece, a locking tooth extending towards the parking gear is arranged at the extending end of the pawl, and the first elastic piece is used for providing elastic force for driving the locking tooth to be far away from the parking gear;

the push rod is arranged on the end cover of the gearbox in a sliding manner along the direction approaching or separating from the pawl, and is used for pushing the extending end of the pawl to move close to the parking gear and enabling the locking tooth to be meshed with the parking gear;

the driving piece is arranged on the end cover of the gearbox and used for driving the push rod to slide.

Optionally, the push rod is towards the tip of pawl is equipped with the slider, the slider is followed the direction of motion of push rod slides and sets up on the push rod, the slider through the second elastic component with the push rod is connected, the second elastic component is used for providing the promotion the slider towards the elastic force of pawl one side motion.

Optionally, a limit cap is arranged at the end of the push rod facing the pawl, and the limit cap is used for limiting the slide block axially.

Optionally, a first chamfer structure is provided at an end of the slider facing the pawl.

Optionally, a second chamfer structure in sliding fit with the first chamfer structure is arranged at the end part of the pawl, which extends towards the sliding block;

and a locking surface is arranged on the pawl, and when the locking tooth is meshed with the parking gear, the locking surface is propped against the surface of the sliding block in the radial direction of the parking gear.

Optionally, the device further comprises a guide structure arranged on the end cover of the gearbox, wherein a guide groove which is in sliding fit with the push rod is formed in the guide structure, and a movable gap is reserved between the guide groove and the push rod;

the driving piece comprises a driving motor and a swing arm, the driving motor is installed on the outer side of the gearbox end cover, an output shaft of the driving motor extends to the inner side of the gearbox end cover and is connected with one end of the swing arm, and the other end of the swing arm is rotatably connected with the push rod.

Optionally, the gearbox end cover is further provided with a top block, when the lock tooth is meshed with the parking gear, the push rod is located between the top block and the pawl, and the top block is propped against the push rod and is used for providing supporting force for the push rod along the radial direction of the parking gear.

Optionally, the device further comprises a locking structure installed on the gearbox end cover, the locking structure comprises a lock pin and a locking seat, the lock pin is connected with the locking seat through a third elastic piece, the third elastic piece is used for providing elastic force for pushing the lock pin to move towards an output shaft of the driving motor, and two locking grooves used for being in clamping fit with the lock pin are formed in the swing arm along the swing direction of the swing arm;

when the lock teeth are meshed with the parking gear, the lock pin is matched with one of the lock grooves in a clamping mode, and when the lock teeth are separated from the parking gear, the lock pin is matched with the other lock groove in a clamping mode.

Optionally, the third elastic member is an elastic plate, and an extending direction of the third elastic member is perpendicular to a radial direction of an output shaft of the driving motor.

In a second aspect, the present disclosure provides a gearbox, including the parking structure as described above, further including a gearbox end cover, the pawl, the ejector pad, the guide structure, the push rod, the driving member and the locking structure are sequentially arranged on the gearbox end cover along a circumferential direction.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the utility model provides a parking structure, pawl, push rod, driving piece in the parking structure are all installed on the gearbox end cover to experiments such as debugging, the test of whole parking structure all can be gone on the gearbox end cover, and the assembly of the parking structure of also being convenient for simultaneously, it is to be noted that, this kind of setting up mode can make the parking structure realize modularized design, thereby improves design efficiency, suitability stronger, also is convenient for maintenance work more.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the description of the embodiments or the prior art will be briefly described below, and it will be obvious to those skilled in the art that other drawings can be obtained from these drawings without inventive effort.

FIG. 1 is a cross-sectional view of a park feature according to an embodiment of the present disclosure;

FIG. 2 is a schematic illustration of a park feature mounted to a transmission end cap according to an embodiment of the present disclosure;

fig. 3 is a schematic structural view of a parking structure in an unlocked state according to an embodiment of the present disclosure;

fig. 4 is a schematic structural view of a parking structure in a parking state according to an embodiment of the present disclosure;

FIG. 5 is a partial cross-sectional view of a park feature mounted to a transmission end cap according to an embodiment of the present disclosure.

11, a pawl; 111. locking teeth; 112. a locking surface; 12. a push rod; 121. a slide block; 122. a limit cap; 13. a driving member; 131. a driving motor; 132. swing arms; 133. a locking groove; 14. a parking gear; 15. a guide structure; 16. a locking structure; 161. a locking pin; 162. a locking seat; 2. a gearbox end cap; 31. a first elastic member; 32. a second elastic member; 33. a third elastic member; 41. a first chamfer structure; 42. a second chamfer structure; 5. and (5) a top block.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, a further description of aspects of the present disclosure will be provided below. It should be noted that, without conflict, the embodiments of the present disclosure and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it will be apparent that the embodiments in the specification are only some, but not all, embodiments of the disclosure.

Based on this, this embodiment provides a parking structure and gearbox, pawl, push rod, driving piece in the parking structure are all installed on the gearbox end cover to the debugging of whole parking structure, test etc. are experimental all can be gone on the gearbox end cover, and the assembly of parking structure of also being convenient for simultaneously, and it is to be noted that, this kind of setting up mode can make the parking structure realize modularized design, thereby improves design efficiency, the suitability is stronger, also is convenient for maintain work more. The following is a detailed description of the present invention by way of specific examples:

referring to fig. 1 to 5, a parking structure provided in this embodiment is mounted on a transmission end cover 2, and includes: a pawl 11, a push rod 12, a driver 13 and a parking gear 14; the parking gear 14 is coaxially connected with a transmission shaft of the gearbox; the pawl 11 is rotatably connected with the gearbox end cover 2 through a first elastic member 31; the first elastic member 31 may be a torsion spring, and is connected to the pawl 11 and the rotating shaft of the gearbox end cover 2, where the protruding end of the pawl 11 is provided with a locking tooth 111 protruding toward the parking gear 14, and the first elastic member 31 is used for providing an elastic force for driving the locking tooth 111 to be far away from the parking gear 14; the push rod 12 is slidably arranged on the gearbox end cover 2 along the direction approaching or separating from the pawl 11, and the push rod 12 is used for pushing the extending end of the pawl 11 to move close to the parking gear 14 and enabling the locking tooth 111 to be meshed with the parking gear 14; a drive member 13 is provided on the gearbox end cap 2 and is used to drive the push rod 12 in sliding motion.

The pawl 11, the push rod 12 and the driving piece 13 in the parking structure are all installed on the gearbox end cover 2, so that the whole debugging, testing and other tests of the parking structure can be performed on the gearbox end cover 2, meanwhile, the assembly of the parking structure is more convenient, and the arrangement mode can enable the parking structure to achieve modularized design, so that the design efficiency is improved, the applicability is higher, and the maintenance work is more convenient.

With continued reference to fig. 1 to 4, the end of the push rod 12 facing the pawl 11 is provided with a slider 121, the slider 121 is slidably disposed on the push rod 12 along the movement direction of the push rod 12, the slider 121 is connected to the push rod 12 through a second elastic member 32, and the second elastic member 32 is used for providing an elastic force for pushing the slider 121 to move toward one side of the pawl 11; through the arrangement of the sliding block 121 and the second elastic piece 32, when the push rod 12 moves towards the pawl 11, the contact between the push rod 12 and the pawl 11 can realize elastic collision, so that the impact force between the push rod 12 and the pawl 11 is reduced, the service lives of the push rod and the pawl are prolonged, and abnormal sound in the gearbox can be reduced; it should be understood that when the vehicle is braked, the gearbox is hung into the parking gear, and at this time, the pawl 11 has a probability of being opposite to the tooth top of one tooth of the parking gear 14, that is, the pawl 11 cannot lock the parking gear 14, the push rod 12 can be prevented from forcibly pressing the pawl 11 through the arrangement of the sliding block 121 and the second elastic member 32, and the problems that one or more of the pawl 11, the parking gear 14, the push rod 12 and the driving member 13 are crushed and damaged can be effectively avoided; when the wheels move and the gearbox is still in the parking gear, the second elastic piece 32 can be utilized to push the pawl 11 to be meshed with the parking gear 14 through the sliding block 121 in time when the pawl 11 is aligned with the gear groove on the parking gear 14, so that parking locking is realized.

It should be noted that the second elastic member 32 may be a cylindrical spring coaxially sleeved on the push rod 12, and one end thereof is connected to the push rod 12, and the other end thereof is connected to the slider 121.

In some embodiments, the end of the push rod 12 facing the pawl 11 is provided with a limit cap 122, and the limit cap 122 is used for limiting the slide block 121 axially; the slider 121 can be prevented from sliding out of the push rod 12 by the limit cap 122.

In some embodiments, the end of the slider 121 facing the pawl 11 is provided with a first chamfer 41; in a further embodiment, the end of the pawl 11 that protrudes towards the slider 121 is provided with a second chamfer 42 that is in sliding engagement with the first chamfer 41; the pawl 11 is provided with a locking surface 112, when the locking tooth 111 is meshed with the parking gear 14, the locking surface 112 is propped against the surface of the sliding block 121 in the radial direction of the parking gear 14, and it should be understood that the locking surface 112 can be in a planar structure, and the surface of the sliding block 121 can be in a planar structure which is jointed with the locking surface 112 or can be in a cylindrical surface; by providing the first chamfer structure 41 and the second chamfer structure 42, a guiding effect can be realized, and the collision occurring when the slider 121 contacts the pawl 11 can be further reduced; by providing the locking surface 112, it is possible to ensure that the slider 121 is prevented from being disengaged from the pawl 11 when the lock tooth 111 is engaged with the parking gear 14, thereby improving reliability and stability of the parking structure.

In some embodiments, the parking structure further comprises a guiding structure 15 mounted on the gearbox end cover 2, a guiding groove in sliding fit with the push rod 12 is formed in the guiding structure 15, and a movable gap is reserved between the guiding groove and the push rod 12, so that when the swing arm 132 pushes the push rod 12 to reciprocate, dead points caused by shaking in other directions formed in the moving direction of the swing arm are avoided, and the parking structure is blocked; the driving piece 13 comprises a driving motor 131 and a swing arm 132, the driving motor 131 is arranged on the outer side of the gearbox end cover 2, an output shaft of the driving motor 131 extends to the inner side of the gearbox end cover 2 and is connected with one end of the swing arm 132, and the other end of the swing arm 132 is rotatably connected with the push rod 12.

In a further embodiment, the connection between the output shaft of the driving motor 131 and the end cover 2 of the gearbox is provided with a sealing structure, which may form an axial limiting structure to prevent the output shaft of the driving motor 131 from moving in the axial direction, and at the same time, the end of the output shaft of the driving motor 131 may be provided with a limiting member, wherein the swing arm 132 is mounted between the limiting member and the end cover 2 of the gearbox, so as to realize limiting of the swing arm 132 in the axial direction.

In some embodiments, the gearbox end cover 2 is further provided with a top block 5, when the lock tooth 111 is meshed with the parking gear 14, the push rod 12 is located between the top block 5 and the pawl 11, and the top block 5 is abutted against the push rod 12 and is used for providing supporting force for the push rod 12 along the radial direction of the parking gear 14; by the arrangement of the top block 5, when the lock tooth 111 is meshed with the parking gear 14, the sliding block 121 can stably provide supporting force for the pawl 11 along the radial direction of the parking gear 14, so that the reliability of the parking structure is ensured; it should be appreciated that by the provision of the top piece 5, the negative influence of the slider 121 due to the wobble caused by the clearance between the guide groove and the push rod 12 can be avoided.

In further embodiments, the top block 5 may be a cylinder, a spherical block, or other block-shaped structures, as long as it can be ensured that it can stably provide a supporting force to the slider 121.

In some embodiments, the parking structure further comprises a locking structure 16 mounted on the gearbox end cover 2, the locking structure 16 comprises a lock pin 161 and a locking seat 162, the lock pin 161 is connected with the locking seat 162 through a third elastic piece 33, the third elastic piece 33 is used for providing elastic force for pushing the lock pin 161 to move towards an output shaft of the driving motor 131, and two locking grooves 133 for being in clamping fit with the lock pin 161 are formed on the swing arm 132 along the swinging direction of the swing arm; when the lock tooth 111 is meshed with the parking gear 14, the lock pin 161 is in clamping fit with one of the lock grooves 133, and when the lock tooth 111 is separated from the parking gear 14, the lock pin 161 is in clamping fit with the other lock groove 133; the two locking grooves 133 can be smoothly transited through the circular arc structure, so that the smoothness of position switching of the lock pins 161 in the two locking grooves 133 is ensured; by providing the locking structure 16, it is possible to ensure that the driving motor 131 stably holds the position of the push rod 12 when switching the parking structure to the unlocking state or the parking state, thereby remarkably improving the reliability of the parking structure.

With continued reference to fig. 1 to 4, the third elastic member 33 is an elastic plate, and an extending direction of the third elastic member 33 is perpendicular to a radial direction of the output shaft of the driving motor 131; this arrangement can further improve the locking stability of the entire locking structure 16 by utilizing the strength of the third elastic member 33 itself.

In a second aspect, the present disclosure provides a gearbox, including the parking structure as described above, and further including a gearbox end cover 2, where a pawl 11, a top block 5, a guide structure 15, a push rod 12, a driving member 13, and a locking structure 16 are sequentially arranged on the gearbox end cover 2 in a circumferential direction; that is, the parking structure realizes the design of the parking structure module on the gearbox end cover 2, thereby improving the design efficiency, having stronger applicability and being more convenient for maintenance work.

The specific implementation manner and implementation principle are the same as those of the above embodiment, and the same or similar technical effects can be brought, which are not described in detail herein, and specific reference may be made to the description of the above parking structure embodiment.

It should be noted that in this document, relational terms such as "first" and "second" and the like are 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. Moreover, 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 one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is merely a specific embodiment of the disclosure to enable one skilled in the art to understand or practice the disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown and described herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Parking structure, install on gearbox end cover (2), characterized by, include: a pawl (11), a push rod (12), a driving piece (13) and a parking gear (14);

the parking gear (14) is coaxially connected with a transmission shaft of the gearbox;

the pawl (11) is rotationally connected with the gearbox end cover (2) through a first elastic piece (31), a locking tooth (111) extending towards the parking gear (14) is arranged at the extending end of the pawl (11), and the first elastic piece (31) is used for providing elastic force for driving the locking tooth (111) to be far away from the parking gear (14);

the push rod (12) is arranged on the end cover (2) of the gearbox in a sliding way along the direction approaching or separating from the pawl (11), and the push rod (12) is used for pushing the extending end of the pawl (11) to move close to the parking gear (14) and enabling the locking tooth (111) to be meshed with the parking gear (14);

the driving piece (13) is arranged on the gearbox end cover (2) and used for driving the push rod (12) to slide.

2. Parking structure according to claim 1, characterized in that the end of the push rod (12) facing the pawl (11) is provided with a slider (121), the slider (121) is slidably arranged on the push rod (12) along the movement direction of the push rod (12), the slider (121) is connected with the push rod (12) through a second elastic member (32), and the second elastic member (32) is used for providing an elastic force pushing the slider (121) to move towards one side of the pawl (11).

3. Parking structure according to claim 2, characterized in that the end of the push rod (12) facing the pawl (11) is provided with a limit cap (122), the limit cap (122) being intended to be axially limited with the slider (121).

4. Parking structure according to claim 2, characterized in that the end of the slider (121) facing the pawl (11) is provided with a first chamfer structure (41).

5. Parking structure according to claim 4, characterized in that the end of the pawl (11) projecting towards the slider (121) is provided with a second chamfer structure (42) slidingly cooperating with the first chamfer structure (41);

the pawl (11) is provided with a locking surface (112), and when the locking tooth (111) is meshed with the parking gear (14), the locking surface (112) is abutted against the surface of the sliding block (121) in the radial direction of the parking gear (14).

6. Parking structure according to claim 1, characterized in that it further comprises a guiding structure (15) mounted on the gearbox end cover (2), the guiding structure (15) is provided with a guiding groove slidingly matched with the push rod (12), and a movable gap is left between the guiding groove and the push rod (12);

the driving piece (13) comprises a driving motor (131) and a swing arm (132), the driving motor (131) is installed on the outer side of the gearbox end cover (2), an output shaft of the driving motor (131) extends to the inner side of the gearbox end cover (2) and is connected with one end of the swing arm (132), and the other end of the swing arm (132) is rotationally connected with the push rod (12).

7. Parking structure according to claim 6, characterized in that the gearbox end cap (2) is further provided with a top block (5), and that the push rod (12) is located between the top block (5) and the pawl (11) when the locking tooth (111) is engaged with the parking gear (14), and that the top block (5) is abutted against the push rod (12) and is used for providing a supporting force for the push rod (12) along the radial direction of the parking gear (14).

8. Parking structure according to claim 6, further comprising a locking structure (16) mounted on the gearbox end cover (2), wherein the locking structure (16) comprises a lock pin (161) and a locking seat (162), the lock pin (161) is connected with the locking seat (162) through a third elastic member (33), the third elastic member (33) is used for providing an elastic force for pushing the lock pin (161) to move towards an output shaft of the driving motor (131), and two locking grooves (133) for being in clamping fit with the lock pin (161) are formed on the swing arm (132) along the swing direction of the swing arm;

when the lock tooth (111) is meshed with the parking gear (14), the lock pin (161) is matched with one lock groove (133) in a clamping mode, and when the lock tooth (111) is separated from the parking gear (14), the lock pin (161) is matched with the other lock groove (133) in a clamping mode.

9. Parking structure according to claim 8, characterized in that the third elastic member (33) is an elastic plate, and the extending direction of the third elastic member (33) is perpendicular to the radial direction of the output shaft of the driving motor (131).

10. A gearbox, characterized in that the parking structure according to any one of claims 1 to 9 is included, and the parking structure further includes a gearbox end cover (2), wherein the pawl (11), the top block (5), the guide structure (15), the push rod (12), the driving piece (13) and the locking structure (16) are sequentially arranged on the gearbox end cover (2) along the circumferential direction.