CN217271848U - Parking mechanism and vehicle - Google Patents

Abstract

The utility model provides a parking mechanism and vehicle, the utility model discloses a parking mechanism includes the parking gear, rotates the parking arm that sets up, and be used for ordering about parking arm pivoted execution portion, and execution portion has the parking axle of being connected with the transmission of rotary drive device, rotate and locate the epaxial parking cam of parking, link firmly in the epaxial parking pawl of parking, and locate the driving spring between parking cam and the parking pawl, be equipped with transmission structure between parking pawl and the parking arm, transmission structure is including locating the driving medium on parking pawl and the parking arm between the two, and locate the butt portion on parking pawl and the parking arm on the other of the two. The utility model discloses a parking mechanism to the return spring among the mode replacement traditional art of accessible mechanical locking realizes the arm of parking in the maintenance that breaks away from the state, and can eliminate the risk of arm of parking and parking gear striking under the extreme condition, and then can improve the reliability of vehicle under the parking state.

Description

Parking mechanism and vehicle

Technical Field

The utility model relates to a vehicle technical field, in particular to parking mechanism, simultaneously, the utility model relates to a vehicle with this parking mechanism.

Background

The automotive transmission, which is a core part of an automotive transmission system, is a set of transmission devices for coordinating the rotational speed of an engine and the actual running speed of wheels, and is used for exerting the optimal performance of the engine. The transmission can produce different transmission ratios between the engine and the wheels during the running of the vehicle. In practical applications, the engine can be operated in its optimum power performance state by shifting gears.

The parking mechanism is used as an important parking part in the transmission, is the key for realizing the parking function, and is also the guarantee that the automobile can be safely and stably parked on the road. At present, in a parking mechanism of a traditional automatic transmission, three driving modes of mechanical parking, hydraulic parking and motor parking are available. The mechanical parking is realized by a mechanical hand-pulling push rod, the hydraulic parking is realized by a parking spring providing power, the hydraulic module provides hydraulic pressure to remove parking, and the motor parking mechanism replaces a manual operation part with a motor drive on the traditional mechanical parking mechanism.

The existing motor parking mechanism generally comprises a parking gear shifting shaft, a parking pawl, a parking cam, a driving spring, a parking arm, a parking gear, a parking arm pin shaft, a return spring, a positioning seat, a parking motor and the like, so that parking and parking releasing functions are realized. When parking, the parking motor receives a command of 'starting parking' from the controller, the parking motor drives the parking pawl to rotate, the parking pawl drives the parking cam to rotate through the driving spring, and the parking cam pushes the parking arm teeth to enter the parking gear tooth grooves to realize parking; on the contrary, when parking needs to be relieved, the parking motor receives a parking releasing command of the controller, the parking motor rotates reversely to drive the parking pawl, the driving spring and the parking cam to rotate reversely, the parking cam is separated from the parking arm, and the parking arm retreats from the parking gear tooth groove and returns to the limiting surface of the transmission shell.

However, in the existing motor parking mechanism, because the parking arm is kept by the return spring in the non-P-gear state, the return spring cannot ensure that the parking arm is stably in the non-P-gear state under the limit condition, so that gear beating is easily caused, even a transmission is damaged, and harm is caused to a vehicle and even a driver. In addition, the existing motor parking mechanism is not enough in overall structure arrangement, occupies a large space, and is not beneficial to the overall structure arrangement of a transmission and a vehicle.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to a parking mechanism with better parking reliability.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a parking mechanism comprises a parking gear, a parking arm and an execution part, wherein the parking arm is rotationally arranged, the execution part is used for driving the parking arm to rotate, the execution part is provided with a parking shaft in transmission connection with a rotary driving device, a parking cam rotationally arranged on the parking shaft, a parking pawl fixedly connected on the parking shaft, and a driving spring arranged between the parking cam and the parking pawl;

a transmission structure is arranged between the parking pawl and the parking arm, and comprises a transmission part arranged on one of the parking pawl and the parking arm and an abutting part arranged on the other of the parking pawl and the parking arm;

when the parking is released, the transmission piece is in sliding butt joint with the abutting part, the parking arm can be driven to be separated from the parking gear, and after the parking is released, the transmission piece is in butt joint with the abutting part, and the parking arm can be kept in a separated state.

Further, the transmission part is a transmission rod arranged on the parking arm, the parking pawl is provided with a transmission arm extending outwards, and the abutting part is an abutting surface formed on one side of the transmission arm; or, the transmission part is a transmission rod arranged on the parking pawl, the parking arm is provided with a slot, and the abutting part is an abutting surface formed on the inner wall of the slot.

Further, the transmission rod is rotatably arranged on the parking arm or the parking pawl.

Furthermore, a limiting surface is arranged on one side of the parking arm, and when the parking arm is in the separation state, the limiting surface is connected with the external limiting matching structure in an abutting mode.

Furthermore, the driving spring is sleeved with a torsion spring on the parking shaft, one end of the torsion spring is abutted to the parking pawl, and the other end of the torsion spring is inserted into a through hole in the parking cam.

Furthermore, be formed with the boss on the parking cam, the through-hole is located on the boss, just be formed with parking cam cooperation profile on the parking pawl, parking cam cooperation profile with the boss butt, and can by the parking pawl drives the parking cam rotates.

Furthermore, the execution part is also provided with a positioning seat, a positioning seat matching molded surface is arranged on the parking pawl, and the positioning seat is abutted to the positioning seat matching molded surface.

Furthermore, the rotary driving device adopts a parking motor, and the power output end of the parking motor is in transmission connection with the parking shaft.

Further, the parking shaft is arranged coaxially with the parking motor.

Compared with the prior art, the utility model discloses following advantage has:

parking mechanism, through the setting of transmission structure to can drive the parking arm by the parking pawl and break away from parking gear when removing parking, and keep the parking arm in the state of breaking away from by the parking pawl after removing the parking, and then can replace return spring among the conventional art through the mode of machinery locking to realize parking arm in the maintenance of the state of breaking away from, thereby can eliminate the risk of parking arm and parking gear striking under the extreme condition, and improve the reliability of vehicle under the parking state.

Another object of the present invention is to provide a vehicle, wherein the parking mechanism is disposed in the vehicle.

The utility model discloses a vehicle is through setting up foretell parking mechanism, can eliminate the risk of parking arm and parking gear striking under the extreme condition, and can improve the reliability of vehicle under the parking state, improves the vehicle quality.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic view of a parking mechanism according to a first embodiment of the present invention;

fig. 2 is a schematic view of another perspective structure of the parking mechanism according to the first embodiment of the present invention;

fig. 3 is a schematic structural view of a parking gear according to a first embodiment of the present invention;

fig. 4 is a schematic view of a view structure of a parking arm according to a first embodiment of the present invention;

fig. 5 is a schematic view of another perspective structure of the parking arm according to the first embodiment of the present invention;

fig. 6 is a schematic structural view of a transmission rod according to a first embodiment of the present invention;

fig. 7 is a schematic view of a view angle structure of a parking pawl according to a first embodiment of the present invention;

fig. 8 is a schematic view of another perspective structure of the parking pawl according to the first embodiment of the present invention;

fig. 9 is a schematic structural diagram of a parking cam according to a first embodiment of the present invention.

Description of reference numerals:

1. a parking gear; 101. mounting a spline; 102. gear teeth; 103. a tooth socket;

2. a parking arm; 201. a limiting surface; 202. arm teeth; 203. a first mounting hole; 204. a cam mating surface;

3. a parking axle; 301. a card slot;

4. a parking cam; 401. a boss; 4011. a through hole; 402. a second mounting hole;

5. a parking pawl; 501. a drive arm; 502. a parking cam mating profile; 5011. an abutting surface; 503. the positioning seat is matched with the molded surface; 504. a spring limiting surface;

6. a drive spring; 7. a transmission rod; 8. positioning seats; 9. a pin shaft; 10. a snap ring.

Detailed Description

It should be noted that, in the present invention, 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", "inner", "outer", "front", "rear", "left", "right", "top", "bottom" and the like appear, they are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of 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 order, but are to be construed as referring to the same order.

In addition, in the description of the present invention, the terms "mounted," "connected," and "connected" are to be construed broadly unless otherwise specifically limited. For example, the connection may 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 meaning of the above terms in the present invention can be understood in combination with the specific situation.

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

Example one

The utility model relates to a parking mechanism, in overall structure, this parking mechanism includes parking gear 1, rotates the parking arm 2 that sets up to and be used for ordering about parking arm 2 pivoted execution portion, and the execution portion has the parking axle 3 of being connected with the rotation driving device transmission, rotates and locates parking epaxial parking cam 4 of parking, links firmly in parking pawl 5 on parking axle 3, and locates drive spring 6 between parking cam 4 and the parking pawl 5.

Wherein, as this parking mechanism's main improvement point, be equipped with transmission structure between parking pawl 5 and parking arm 2, transmission structure is including locating the driving medium on parking pawl 5 and parking arm 2 one of them to and locate the butt portion on parking pawl 5 and parking arm 2 another.

When the parking is released, the transmission piece is in sliding butt joint with the butt joint part, the parking arm 2 can be driven to be separated from the parking gear 1, and after the parking is released, the transmission piece is in butt joint with the butt joint part, and the parking arm 2 can be kept in a separated state.

It should be noted that, in a specific implementation, the parking mechanism of the present embodiment is disposed on a transmission, wherein the parking gear 1 is mounted on an output shaft of the transmission, the parking arm 2 is rotatably disposed on a transmission housing through a pin 9, and the parking shaft 3 is also rotatably disposed on the transmission housing.

Based on the above general description, in the present embodiment, as a preferred embodiment, as shown in fig. 1, fig. 2 and fig. 3, the parking gear 1 in the present embodiment includes a mounting spline 101 connected to the transmission output shaft, and a plurality of gear teeth 102 provided on the body of the parking gear 1, and a tooth groove 103 for parking in cooperation with an arm tooth 202 of the parking arm 2 is formed between the gear teeth 102.

In specific implementation, the arm teeth 202 enter the tooth grooves 103 during parking, and the parking arm 2 and the parking gear 1 are engaged, so that the parking arm and the parking gear are locked relatively, that is, the parking mechanism is in a P-gear state, and when the arm teeth 202 are disengaged from the tooth grooves 103, the parking mechanism is in a non-P-gear state.

The parking arm 2 is further provided with a first mounting hole 203 for mounting on the pin 9, and a cam mating surface 204 for abutting against a protruding portion (hereinafter referred to as a front rocker arm) of the parking cam 4, and the parking cam 4 pushes the cam mating surface 204 through the front rocker arm, so as to push the parking arm 2 to move toward the parking gear 1.

Preferably, as shown in fig. 1, 2 and 7, the driver of the present embodiment is a transmission lever 7 provided on the parking arm 2, the parking pawl 5 is provided with a transmission arm 501 extending outward, and the contact portion is a contact surface 5011 formed on one side of the transmission arm 501. In a specific structure, the abutment face 5011 is formed between the transmission arm 501 and the parking pawl 5 body.

In specific implementation, the transmission rod 7 is riveted to the parking arm 2, and the specific structure is shown in fig. 5 and 6, and the cross-sectional area of the portion penetrating through the parking arm 2 is smaller than the portion of the two ends extending out of the parking arm 2, so as to prevent the transmission rod 7 and the parking arm 2 from being separated from each other to affect the transmission stability.

Preferably, the transmission rod 7 is rotatably provided on the parking arm 2 to reduce friction between the transmission rod 7 and the abutment, thereby improving the service life of the transmission rod 7 and the parking pawl 5 and improving the transmission effect between the parking arm 2 and the parking pawl 5.

In addition to the above-described configuration, the transmission structure of the present embodiment may preferably be configured such that the transmission lever 7 is provided on the parking pawl 5 as a transmission member, the parking arm 2 is provided with a slot, and the contact portion is a contact surface 5011 formed on an inner wall of the slot.

In specific implementation, the shape of the groove is set according to the moving track of the transmission rod 7 when parking is released, so that effective transmission between the two can be realized only by ensuring, and the parking arm 2 can be stably kept in a disengagement state (non-P-gear state). Of course, the transmission lever 7 is also preferably arranged on the parking pawl 5 in a rotating manner.

Preferably, as shown in fig. 4, a limit surface 201 is disposed on one side of the parking arm 2 in the present embodiment, and when the parking arm 2 is in the disengaged state, the limit surface 201 may abut against the external limit engagement structure. It is worth mentioning here that the external limit fitting structure is typically a limit fitting surface on the transmission housing.

Meanwhile, as shown in fig. 1 and 9, the driving spring 6 is preferably a torsion spring that is sleeved on the parking axle 3, one end of the torsion spring abuts against the parking pawl 5, and the other end of the torsion spring is inserted into the through hole 4011 of the parking cam 4. As a further setting, in a specific structure, a boss 401 is formed on the parking cam 4, the through hole 4011 is located on the boss 401, and a parking cam matching profile 502 is formed on the parking pawl 5, the parking cam matching profile 502 abuts against the boss 401, and the parking cam 4 can be driven to rotate by the parking pawl 5.

It should be noted that the parking cam 4 is further provided with a second mounting hole 402 for mounting on the parking shaft 3, and in order to ensure the mounting stability of the parking cam 4, the parking shaft 3 is further provided with a snap ring 10, and the parking cam 4 is interposed between the snap ring 10 and the parking pawl 5. As shown in fig. 7 and 8, a snap groove 301 for engaging the snap ring 10 is formed in the parking shaft 3.

Meanwhile, the boss 401 is preferably provided on the front rocker arm (a protruding portion of the parking cam 4), and a portion of the parking pawl 5 that abuts against the torsion spring is formed with a spring stopper surface 504, and the spring stopper surface 504 is used to prevent the torsion spring from being disengaged.

In specific implementation, the torsion spring connects the parking cam 4 with the parking pawl 5, when the parking action is executed, the rotary driving device drives the parking shaft 3 to drive the parking pawl 5 to rotate, the spring limiting surface 504 of the parking pawl 5 pulls one end, abutted against the spring limiting surface 504, of the driving spring 6, the other end drives the parking cam 4 to rotate through the boss 401, and the front end rocker arm pushes the parking arm 2 to be meshed with the parking gear 1, so that the parking action is realized.

As shown in fig. 1, 2 and 8, the actuator of the present embodiment preferably further includes a positioning seat 8, the parking pawl 5 is provided with a positioning seat mating profile 503, and the positioning seat 8 abuts against the positioning seat mating profile 503 to position the parking pawl 5 in the P-shift state (parking state) and the non-P-shift state (parking release state).

Also as a preferred embodiment, the rotary driving device of the present embodiment uses a parking motor, and the power output end of the parking motor is in transmission connection with the parking shaft 3. And as further setting, parking axle 3 and parking motor coaxial arrangement to can utilize parking axle 3 and parking cam 4 to promote the rotation of parking arm 2 and realize the parking function, and can reduce parking axle 3 and parking motor's arrangement space, simple reliable, with low costs, and easily assembly.

When the parking mechanism of the embodiment is used, the parking mechanism can complete parking in two situations: normal parking and false-engagement parking. The following use will be described by taking as an example the case where the transmission lever 7 of the transmission structure is provided on the parking arm 2.

When the automobile is parked normally, a driver stops the automobile and engages the gear P, and the transmission controller gives a parking instruction. At this moment, the parking motor rotates to drive the parking axle 3 and the parking pawl 5 to rotate in the same direction, the parking pawl 5 pulls one end of the driving spring 6 which is abutted to the spring limiting surface 504 through the spring limiting surface 504, and then the other end of the driving spring 6 pulls the parking cam 4 to rotate through the boss 401.

The parking cam 4 is forced to rotate around the parking shaft 3, so that the front end rocker arm of the parking cam 4 is in abutting contact with the cam matching surface 204 of the parking arm 2, the parking arm 2 is pushed to rotate around the pin shaft 9, the arm teeth 202 are further pushed to enter the tooth grooves 103 of the parking gear 1, after the parking arm 2 rotates to a position, the parking motor stops moving, and the parking arm 2 is kept in the tooth grooves 103 by being arranged close to the top of the front end rocker arm, namely, is kept in a P gear (parking state).

In the event of a miss-engagement parking, that is, the front rocker arm of the parking cam 4 does not push the arm teeth 202 smoothly into the tooth grooves 103 of the parking gear 1, but when the arm teeth 202 approach the parking gear 1, the arm teeth 202 are brought into tip-up contact with the gear teeth 102. At this time, the parking motor, the parking shaft 3 and the parking pawl 5 still move, but the parking arm 2 and the parking cam 4 cannot continue to move, the driving spring 6 is continuously compressed to enter an energy storage state, meanwhile, the parking gear 1 also continuously rotates, at the moment that the gear teeth 102 are separated from the arm teeth 202, the driving spring 6 releases energy to drive the parking cam 4 to rotate, and the parking cam 4 pushes the arm teeth 202 into the tooth grooves 103 through the front end rocker arm to complete mistakenly-engaged parking.

When the parking is released, a driver releases the P gear, the transmission controller issues a parking releasing instruction, the parking motor rotates reversely, the parking shaft 3 and the parking pawl 5 rotate reversely under the driving of the parking motor, the parking pawl 5 pushes the boss 401 of the parking cam 4 to enable the parking cam 4 to move reversely around the parking shaft 3, the rocker arm at the front end of the parking cam 4 is gradually separated from the parking arm 2, the arm tooth 202 is separated from the tooth groove 103 to release the parking, and the parking motor stops at the moment.

Meanwhile, in the process that the parking arm 2 exits the tooth groove 103, the transmission arm 501 of the parking pawl 5 pushes the transmission rod 7, so that the transmission rod 7 drives the parking arm 2 to be separated from the parking gear 1, and after the parking motor stops acting, the parking arm 2 is driven to the limiting matching surface of the transmission shell to be kept in a non-P-gear state.

The parking mechanism of this embodiment, through setting up transmission structure, in order to can drive parking arm 2 by parking pawl 5 and break away from parking gear 1 when removing parking, and keep parking arm 2 in the disengagement state by parking pawl 5 after removing the parking, and then can replace the return spring among the conventional art through the mode of mechanical locking to realize parking arm 2 in the maintenance of disengagement state, thereby the risk of parking arm 2 and 1 striking of parking gear under the extreme condition has been eliminated, the reliability of vehicle under the parking state has been improved, customer's personal safety has been guaranteed.

Of course, similar to the existing parking mechanism, the parking mechanism of the present embodiment may further include a return spring at the parking arm 2, where the return spring is generally disposed at the pin 9 of the parking arm 2, and a torsion spring is also used to drive the parking arm 2 to return and provide an acting force for keeping the parking arm 2 at the non-P-position. Thus, the parking mechanism can have double insurance when the parking mechanism is not in the P gear.

Example two

The embodiment relates to a vehicle, and the vehicle is provided with the parking mechanism.

The vehicle of this embodiment can eliminate the risk that parking arm 2 and parking gear 1 clash into under the extreme condition through setting up the parking mechanism of embodiment one, and can improve the reliability of vehicle under the parking state, improves vehicle quality.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a parking mechanism, includes parking gear (1), rotates parking arm (2) that sets up, and is used for ordering about parking arm (2) pivoted execution portion, just execution portion has parking axle (3) of being connected with the transmission of rotary drive device, rotates and locates parking cam (4) on parking axle (3), link firmly in parking pawl (5) on parking axle (3), and locate parking cam (4) with driving spring (6) between parking pawl (5), its characterized in that:

a transmission structure is arranged between the parking pawl (5) and the parking arm (2), and comprises a transmission part arranged on one of the parking pawl (5) and the parking arm (2) and an abutting part arranged on the other of the parking pawl (5) and the parking arm (2);

when parking is released, the transmission piece is in sliding butt joint with the abutting part, the parking arm (2) can be driven to be separated from the parking gear (1), and after parking is released, the transmission piece is in butt joint with the abutting part, and the parking arm (2) can be kept in a separated state.

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

the transmission piece is a transmission rod (7) arranged on the parking arm (2), the parking pawl (5) is provided with a transmission arm (501) extending outwards, and the abutting part is an abutting surface (5011) formed on one side of the transmission arm (501); alternatively, the first and second electrodes may be,

the transmission part is a transmission rod (7) arranged on the parking pawl (5), a slot is formed in the parking arm (2), and the abutting part is an abutting surface (5011) formed on the inner wall of the slot.

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

the transmission rod (7) is rotatably arranged on the parking arm (2) or the parking pawl (5).

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

one side of the parking arm (2) is provided with a limiting surface (201), and when the parking arm (2) is in the separation state, the limiting surface (201) is abutted with an external limiting matching structure.

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

the driving spring (6) is sleeved with a torsion spring on the parking axle (3), one end of the torsion spring is abutted to the parking pawl (5), and the other end of the torsion spring is inserted into a through hole (4011) in the parking cam (4).

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

be formed with boss (401) on parking cam (4), through-hole (4011) is located on boss (401), just be formed with parking cam cooperation profile (502) on parking pawl (5), parking cam cooperation profile (502) with boss (401) butt, and can by parking pawl (5) drive parking cam (4) rotate.

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

the executing part is further provided with a positioning seat (8), a positioning seat matching molded surface (503) is arranged on the parking pawl (5), and the positioning seat (8) is abutted to the positioning seat matching molded surface (503).

8. The parking mechanism according to any one of claims 1 to 7, characterized in that:

the rotary driving device adopts a parking motor, and the power output end of the parking motor is in transmission connection with the parking axle (3).

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

the parking axle (3) is arranged coaxially with the parking motor.

10. A vehicle, characterized in that:

the vehicle is provided with the parking mechanism of any one of claims 1 to 9.

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