CN215172164U

CN215172164U - Parking mechanism and car

Info

Publication number: CN215172164U
Application number: CN202120378938.2U
Authority: CN
Inventors: 王宝智; 黄秀成; 何国新; 刘双; ***; 林志锋
Original assignee: Guangzhou Automobile Group Co Ltd
Current assignee: Guangzhou Automobile Group Co Ltd
Priority date: 2021-02-19
Filing date: 2021-02-19
Publication date: 2021-12-14
Anticipated expiration: 2031-02-19

Abstract

The utility model relates to a parking mechanism and car. The parking mechanism comprises a parking pawl, a parking ratchet wheel, a guide rod, a reducing cam, a taper pin and a parking spring, wherein a depressed part depressed towards the parking ratchet wheel is arranged at the first end of the parking pawl, the guide rod penetrates through the depressed part and is fixed on the parking pawl, the claw part of the parking pawl is positioned below the depressed part, and the taper pin and the parking spring are sleeved on the guide rod and are positioned in the depressed part; the profile surface of the reducing cam is in contact with the outer conical surface of the conical pin; the pawl portion of the parking pawl is engageable with and disengageable from a parking ratchet wheel to switch the parking mechanism between a parking state and an unlocked state. Parking pawl, parking spring, guide arm and taper pin are integrated into a pawl subassembly and are designed in this application, make this pawl subassembly can assemble alone, need not to carry out solitary spare part assembly on the line again when the derailleur assembly assembles.

Description

Parking mechanism and car

Technical Field

The utility model belongs to the technical field of the parking, especially, relate to a parking mechanism and car.

Background

The parking mechanism needs to achieve four goals of reliable parking function, proper gear shifting force, safe parking speed and parking moving distance meeting the requirements of the laws and regulations. The existing parking mechanism mainly comprises a cam type parking mechanism and a taper pin pull rod type parking mechanism. In order to meet the four major objectives of the design of the parking mechanism, the designed parking mechanism is a quite complex kinematic mechanism.

In a taper pin pull rod type parking mechanism used in the current market, the process of realizing the parking function of the parking pawl is realized by extruding the parking pawl downwards through the movement of a taper pin.

Among the cam-type parking mechanism who uses on the existing market, the process that parking pawl realized the parking function drives the cam rotation through the motor, and the cam is because the external diameter changes, oppresses the parking pawl downwards and realizes the parking function. In the existing cam type parking mechanism, a parking spring is generally installed on a motor cam shaft, different parts are required to be installed on an assembly line independently, and the installation process also relates to a compression process of two torsion springs so as to force the torsion springs to be twisted and compressed, and ensure that the torsion springs form certain elastic potential energy and pretightening force in the whole parking mechanism so as to achieve the state that the whole system can normally operate. The parking mechanism is installed in a spare part mode, the process is complicated, and the risks of neglected loading and misloading are high. The torsional spring needs online pretension, not only needs the frock, causes the potential energy release that the torsional spring stored easily under the condition that appears leaking moreover in the assembling process, causes personnel injured's risk.

In addition, the existing taper pin pull rod type parking mechanism and the existing cam type parking mechanism have a common problem that a large number of scattered parts are needed to be assembled for many times on an assembly line, so that misassembly and neglected assembly are caused, and the normal production rhythm is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the parking mechanism and the automobile are provided aiming at the problems that the existing taper pin pull rod type parking mechanism and the existing cam type parking mechanism are more in dispersed parts and need to be assembled for many times on an assembly line.

In order to solve the technical problem, on the one hand, the embodiment of the utility model provides a parking mechanism, including parking pawl, parking ratchet, guide arm, reducing cam, taper pin and parking spring, the first end of parking pawl is provided with towards the sunken depressed part of parking ratchet, the second end of parking pawl rotates to be connected on static part, the guide arm passes the depressed part and fixes on the parking pawl, the claw of parking pawl is located the below of depressed part, taper pin and parking spring cover are established on the guide arm and are located in the depressed part;

the depressed part is provided with a first side wall and a second side wall which are opposite to each other in the length direction of the guide rod, the parking spring is tightly pressed between the large-diameter end of the taper pin and the second side wall of the depressed part, and the profile surface of the reducing cam is in contact with the outer conical surface of the taper pin;

the claw part of the parking pawl can be meshed with and separated from the parking ratchet wheel under the action of the reducing cam, so that the parking mechanism is switched between a parking state and an unlocking state;

optionally, the parking mechanism further comprises a torsion spring, the second end of the parking pawl is connected to the stationary member through a rotating shaft, and the torsion spring is mounted on the rotating shaft.

Optionally, the parking mechanism further comprises a parking motor for driving the reducing cam to rotate, a key groove is formed in the center of the reducing cam, a key shaft is inserted in the key groove, and the parking motor drives the key shaft to rotate.

Optionally, the parking mechanism further comprises a limiting sleeve, the limiting sleeve is sleeved on the guide rod and located in the recessed portion, and one end of the limiting sleeve abuts against the first side wall of the recessed portion; in the unlocking state, the second end of the limiting sleeve is abutted to the small-diameter end of the taper pin.

Optionally, the guide rod comprises a rod part and a head part connected to one end of the rod part, a guide hole is formed in the second side wall of the recessed part, and the other end of the rod part is inserted into the guide hole.

Optionally, a portion, located at a second end of the first side wall of the recess and facing away from the parking pawl, of the first end of the parking pawl is formed as a vertical plate, a through hole coaxial with the guide hole is formed in the vertical plate, and the rod portion penetrates through the through hole.

Optionally, the parking mechanism further comprises a clamp spring, and a clamp spring groove is formed in the periphery of one end, close to the head, of the rod part; the clamp spring abuts against the first side wall of the recess, and the head portion is pressed on the surface, opposite to the first side wall of the recess, of the vertical plate.

Optionally, the recess is U-shaped.

Alternatively, when the parking pawl is rotated in a direction of engaging with the parking ratchet wheel until a bottom surface of a claw portion of the parking pawl abuts against a tooth crest of the parking ratchet wheel, the parking mechanism enters a pseudo-parking state;

in the false parking state, after the parking ratchet wheel rotates for a preset angle, the parking spring is released, and the claw part of the parking pawl is meshed with the parking ratchet wheel to achieve parking.

According to the parking mechanism that this application embodiment provided, parking pawl's first end is provided with the orientation the sunken depressed part of parking ratchet wheel, the guide arm passes the depressed part is fixed on the parking pawl, the claw of parking pawl is located the below of depressed part, taper pin and parking spring cover are established just be located on the guide arm in the depressed part. Like this, with parking pawl, parking spring, guide arm and taper pin integration pawl subassembly, on the basis of satisfying vehicle parking function requirement, through the pawl subassembly of integrated design, can furthest with several spare parts of scattering integrate to an assembly in, make this pawl subassembly can assemble alone, supply the material alone, need not to carry out solitary spare part assembly on-line again when derailleur assembly, can solve spare part misloading effectively, neglected loading and spare part assembly difficulty scheduling problem, guaranteed the beat of production. In addition, the problems of influence on assembly efficiency, influence on assembly consistency and the like caused by scattered parts can be solved.

In addition, the depressed part is provided with a first side wall and a second side wall which are opposite to each other in the length direction of the guide rod, and the parking spring is pressed between the large-diameter end of the taper pin and the second side wall of the depressed part. Like this, parking spring is in parking pawl's inside, and the elastic potential energy of parking spring's storage belongs to parking pawl's inside potential energy, is locked in parking pawl's inside, can not release parking pawl's outside, can not pop out because of the assembly problem in the assembling process to can avoid causing the condition of personnel injury in the assembling process.

The parking mechanism is mainly applied to a pure electric automobile drive axle assembly, an automatic transmission (AT/CVT/DCT) of a fuel automobile, an electromechanical coupler of a hybrid electric automobile and a parking mechanism in a parking system in a fuel cell vehicle drive axle assembly.

On the other hand, the embodiment of the utility model provides an automobile, it includes foretell parking mechanism.

Drawings

Fig. 1 is an exploded view of a parking mechanism according to an embodiment of the present invention;

fig. 2 is a schematic view of a parking mechanism according to an embodiment of the present invention in an unlocked state;

fig. 3 is a schematic view of a parking mechanism according to an embodiment of the present invention in a parking state;

fig. 4 is a schematic view of a parking mechanism in a pseudo parking state according to an embodiment of the present invention.

The reference numerals in the specification are as follows:

1. a guide bar; 11. a rod portion; 111. a clamp spring groove; 12. a head portion; 2. a clamp spring; 3. a limiting sleeve; 4. a parking pawl; 41. a first end; 42. a recessed portion; 421. a first side wall; 422. a second side wall; 43. a second end; 44. a claw portion; 45. a guide hole; 46. a through hole; 47. a vertical plate; 5. a parking spring; 6. a variable diameter cam; 61. a keyway; 7. a taper pin; 8. a parking ratchet.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 4, the embodiment of the utility model provides an automobile, including parking pawl 4, parking ratchet 8, guide arm 1, reducing cam 6, taper pin 7 and parking spring 5, the first end 41 of parking pawl 4 is provided with the orientation the sunken depressed part 42 of parking ratchet 8, the second end 43 of parking pawl 4 rotates to be connected on static part (for example derailleur casing), guide arm 1 passes depressed part 42 and fixes on parking pawl 4, the claw 44 of parking pawl 4 is located the below of depressed part 42, taper pin 7 and parking spring 5 cover are established on guide arm 1 and be located in depressed part 42.

The recess 42 has a first side wall 421 and a second side wall 422 opposite to each other in the length direction of the guide rod 1, the parking spring 5 is compressed between the large-diameter end of the taper pin 7 and the second side wall 422 of the recess 42, and the profile surface of the variable diameter cam 6 is in contact with the outer conical surface of the taper pin 7.

The pawl portion 44 of the parking pawl 4 is capable of engaging with the parking ratchet wheel 8 (i.e., the pawl portion 44 snaps into a tooth groove of the parking ratchet wheel 8) and disengaging (i.e., the pawl portion 44 disengages from a tooth groove of the parking ratchet wheel 8) so that the parking mechanism can be switched between the parking state and the unlocked state. In the unlocking state, the reducing cam 6 can rotate forward to drive the taper pin 7 to the second end 43 of the parking pawl 4 moves and compresses the parking spring 5, the radius of the contact point of the outer conical surface of the taper pin 7 on the profile surface of the reducing cam 6 is gradually increased to drive the taper pin 7 and the parking pawl 4 to rotate in the same direction of meshing with the parking ratchet wheel 8, and the claw part 44 of the parking pawl 4 is meshed with the parking ratchet wheel 8 to realize parking.

In one embodiment, the parking mechanism further comprises a torsion spring (not shown), and the second end 43 of the parking pawl 4 is connected to the stationary member via a rotating shaft (not shown) on which the torsion spring is mounted.

In the parking state, the variable diameter cam 6 can rotate reversely, the radius of a contact point of the outer conical surface of the taper pin 7 on the profile surface of the variable diameter cam 6 is gradually reduced, and the parking ratchet wheel 8 rotates in a direction disengaging from the parking ratchet wheel 8 under the action of restoring force of the torsion spring, so that the claw part 44 of the parking pawl 4 is disengaged from the parking ratchet wheel 8 to release parking.

In an embodiment, the parking mechanism further includes a parking motor (not shown in the figure) for driving the reducing cam 6 to rotate, a key groove 61 is formed in the center of the reducing cam 6, a key shaft (not shown in the figure) is inserted into the key groove 61, and the parking motor drives the key shaft to rotate.

In an embodiment, the parking mechanism further includes a limiting sleeve 3, the limiting sleeve 3 is sleeved on the guide rod 1 and located in the recessed portion 42, and one end of the limiting sleeve 3 abuts against the first side wall 421 of the recessed portion 42. In the unlocking state, the second end of the limiting sleeve 3 is abutted against the small-diameter end of the taper pin 7.

In an embodiment, the guide rod 1 includes a rod portion 11 and a head portion 12 connected to one end of the rod portion 11, the second sidewall 422 of the recess 42 is provided with a guide hole 45, and the other end of the rod portion 11 is inserted into the guide hole 45.

In an embodiment, a portion of the first end 41 of the parking pawl 4, which is located at the second end 43 of the first side wall 421 of the recess 42 and faces away from the parking pawl 4, is formed as a vertical plate 47, a through hole 46 coaxial with the guide hole 45 is provided on the vertical plate 47, and the rod portion 11 passes through the through hole 46.

In an embodiment, the parking mechanism further comprises a clamp spring 2, and a clamp spring groove 111 is formed in the periphery of one end, close to the head 12, of the rod part 11; the clamp spring 2 abuts against the first side wall 421 of the recess 42, and the head 12 is pressed against the surface of the vertical plate 47 opposite to the first side wall 421 of the recess 42, so as to limit the axial displacement of the guide rod 1.

In one embodiment, the recess 42 is U-shaped.

In one embodiment, when the parking pawl 4 rotates in a direction to engage with the parking ratchet 8 until a bottom surface of the claw portion 44 of the parking ratchet 8 abuts against a tooth crest of the parking ratchet 8, the parking mechanism enters a pseudo parking state; in the false parking state, after the parking ratchet wheel 8 rotates by a predetermined angle, the parking spring 5 is released, and the claw portion 44 of the parking pawl 4 engages with the parking ratchet wheel 8 to achieve parking.

Referring to fig. 2 to 4, the parking mechanism provided in the embodiment of the present application operates according to the following principle:

in the unlocked state (as shown in fig. 2), the parking motor drives the reducing cam 6 with the key groove to rotate around the axis (the reducing cam 6 rotates in the positive direction).

The reducing cam 6 pushes the taper pin 7, the taper pin 7 pushes the parking spring 5 to compress, the parking pawl 4 is in a parking available state (an unlocking state) at present, along with the rotation of the reducing cam 6, the radius of a contact point of an outer conical surface of the taper pin 7 on a contour surface of the reducing cam 6 is gradually increased, after the radius is increased to a certain degree, the reducing cam 6 directly pushes the taper pin 7 to force the taper pin 7 and the parking pawl 4 to rotate in the same direction meshed with the parking ratchet wheel 8 (the force of the reducing cam 6 acting on the taper pin 7 is transmitted to the first end 41 of the parking pawl 4 through the guide rod 1, and therefore the first end 41 of the parking pawl 4 rotates around the second end 43 in the direction meshed with the parking ratchet wheel 8), and parking is achieved (as shown in fig. 3).

In the parking state, the parking motor drives the reducing cam 6 to rotate reversely, the radius of a contact point of the outer conical surface of the taper pin 7 on the contour surface of the reducing cam 6 is gradually reduced, when the radius is reduced to the minimum radius, the parking pawl 4 rotates towards the direction disengaged from the parking ratchet wheel 8 due to the action of a torsion spring (belonging to a general part), and the claw part 44 of the parking pawl 4 is disengaged from the tooth groove of the parking ratchet wheel 8, so that the unlocking function of parking is realized.

Referring to fig. 4, if the tooth tips of parking pawl 4 and parking ratchet 8 are at the same position (i.e., when parking pawl 4 rotates in a direction to engage with parking ratchet 8 until the bottom surface of claw portion 44 of parking ratchet 4 abuts against the tooth tip surface of parking ratchet 8), the state is a pseudo parking state. At the moment, the reducing cam 6 rotates to press the taper pin 7, the taper pin 7 extrudes the parking spring 5, the parking spring 5 is stressed to store elastic potential energy, and the whole parking mechanism is in a false locking state. When the parking ratchet wheel 8 rotates for a certain angle (driven by the rotation of the wheel), the parking spring 5 is released, and the parking pawl 4 realizes parking according to a normal parking mode (the claw part 44 of the parking pawl 4 is meshed with the parking ratchet wheel 8 to realize parking).

According to the parking mechanism that this application embodiment provided, first end 41 of parking pawl 4 is provided with the orientation sunken depressed part 42 of parking ratchet wheel 8, guide arm 1 passes sunken depressed part 42 and fixes on parking pawl 4, the claw 44 of parking pawl 4 is located the below of depressed part 42, taper pin 7 and parking spring 5 cover are established guide arm 1 is last and be located in depressed part 42. Therefore, the parking pawl 4, the parking spring 5, the guide rod 1 and the taper pin 7 are integrated into a sub-assembly, on the basis of meeting the requirement of a vehicle parking function, through the integrally designed pawl sub-assembly, scattered parts can be integrated into one assembly to the maximum extent, so that the pawl sub-assembly can be independently assembled and independently supplied, the assembly of the independent parts is not required to be carried out on line when the transmission assembly is assembled, the problems of wrong assembly, neglected assembly, difficult assembly and the like of the parts can be effectively solved, and the production rhythm is ensured. In addition, the problems of influence on assembly efficiency, influence on assembly consistency and the like caused by scattered parts can be solved.

The recess 42 has a first side wall 421 and a second side wall 422 opposed to each other in the longitudinal direction of the guide bar 1, and the parking spring 5 is pressed between the large diameter end of the taper pin 7 and the second side wall 422 of the recess 42. Like this, parking spring 5 is in the inside of parking pawl 4, and the elastic potential energy of parking spring 5's storage belongs to the inside potential energy of parking pawl 4, is locked in the inside of parking pawl 4, can not release the outside of parking pawl 4, can not pop out because the assembly problem in the assembling process to can avoid causing the condition of personnel injury in the assembling process.

Additionally, the embodiment of the utility model provides a still provide an automobile, it includes foretell parking mechanism.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A parking mechanism is characterized by comprising a parking pawl, a parking ratchet wheel, a guide rod, a reducing cam, a taper pin and a parking spring, wherein a concave part which is concave towards the parking ratchet wheel is arranged at the first end of the parking pawl, the second end of the parking pawl is rotatably connected to a static part, the guide rod penetrates through the concave part and is fixed on the parking pawl, the claw part of the parking pawl is positioned below the concave part, and the taper pin and the parking spring are sleeved on the guide rod and are positioned in the concave part;

the claw part of the parking pawl can be meshed with and separated from the parking ratchet wheel under the action of the reducing cam, so that the parking mechanism is switched between a parking state and an unlocking state.

2. The park mechanism of claim 1, further comprising a torsion spring, the second end of the park pawl being connected to the stationary member by a rotating shaft, the torsion spring being mounted on the rotating shaft.

3. The parking mechanism according to claim 1, further comprising a parking motor for driving the reducing cam to rotate, wherein a key groove is formed in the center of the reducing cam, a key shaft is inserted into the key groove, and the parking motor drives the key shaft to rotate.

4. The parking mechanism according to claim 1, further comprising a limiting sleeve, wherein the limiting sleeve is sleeved on the guide rod and located in the recessed portion, and one end of the limiting sleeve abuts against a first side wall of the recessed portion; in the unlocking state, the second end of the limiting sleeve is abutted to the small-diameter end of the taper pin.

5. The parking mechanism according to claim 1, wherein the guide rod comprises a rod portion and a head portion connected to one end of the rod portion, a guide hole is formed in the second side wall of the recessed portion, and the other end of the rod portion is inserted into the guide hole.

6. The parking mechanism according to claim 5, wherein a portion of the first end of the parking pawl located at the second end of the first side wall of the recess portion facing away from the parking pawl is formed as a vertical plate, a through hole coaxial with the guide hole is provided on the vertical plate, and the rod portion passes through the through hole.

7. The parking mechanism according to claim 6, further comprising a clamp spring, wherein a clamp spring groove is formed in the periphery of one end, close to the head, of the rod part; the clamp spring abuts against the first side wall of the recess, and the head portion is pressed on the surface, opposite to the first side wall of the recess, of the vertical plate.

8. The park mechanism of claim 1, wherein the recess is U-shaped.

9. The parking mechanism according to claim 1, wherein the parking mechanism enters a pseudo-parking state when the parking pawl is rotated in a direction of engaging with the parking ratchet wheel until a bottom surface of a claw portion of the parking pawl abuts against an addendum surface of the parking ratchet wheel;

10. A vehicle comprising a parking mechanism as claimed in any one of claims 1 to 9.