Parking device

Abstract

The utility model provides a parking device which comprises a parking gear, a parking pawl, a driving piece, an executing piece and a limiting piece. The limiting piece is arranged at the return stroke tail end of the executing piece and used for limiting the return stroke of the executing piece, the situation that an executing mechanism is damaged or fails due to stress springback is prevented, the limiting piece can be made of alloy structural steel, the mechanical strength of the parking device can be improved, and springback energy can be effectively absorbed; a push support and a drive rod in the push rod mechanism are designed to be of an integrated structure, assembly is easy, the integration degree is higher, and the risk of assembly looseness caused by stress in the using process is reduced; according to the parking device, the double rollers are installed on the pushing support through the fixing pins, the situation that the fixing pins rotate, loosen and the like under the stress condition is effectively prevented by arranging the anti-rotation limiting structures, the service life of the parking device is further prolonged, and the reliability of the parking device is further improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a parking device. Background Art

[0002] The parking device is a safety device to prevent the vehicle from sliding, and is an indispensable key mechanism in the automatic transmission or new energy electric drive system. In the use of the parking device, it often faces more complex execution conditions. For example, in one condition, when the vehicle is driving at a low speed, the parking system allows the driver to operate the parking device by mistake. At this time, the parking device has a large amount of rebound energy due to the impact; in another condition, when the car is parked on a slope and goes from the parked state to the starting state, there is an interaction force between the pawl and the gear in the parking position. At this time, when the parking gear has torque, the parking gear is released, which will cause the force on the gear to be transmitted back to the actuator.

[0003] However, the existing parking device is difficult to cope with the above two complex situations. It lacks relevant components for limiting the movement stroke of the actuator. When the parking gear belt speed executes parking or the parking gear belt torque executes parking, the parking execution component consumes kinetic energy by itself when subjected to force, which is easy to cause damage and failure. At the same time, the existing parking device is difficult to meet the high mechanical strength requirements. Its push rod mechanism has a complex structure and is mostly assembled from several parts. Its reliability is poor in a long-term load-bearing use environment. Utility Model Content

[0004] In view of the above problems, the present application discloses a parking device to achieve the technical effects of improving the mechanical strength of the parking device, absorbing rebound energy, preventing damage to the actuator, and having simple assembly, high integration and strong reliability.

[0005] To achieve the above object, the present application provides a parking device, which is arranged in a gearbox of a vehicle and includes:

[0006] A parking gear, which is linked to the power transmission shaft of the gearbox;

[0007] A parking pawl, which is rotatably disposed in the gearbox about a fixed axis and can be rotated to a parking position meshing with the parking gear;

[0008] A driving member, which is fixedly connected to the parking drive of the vehicle and performs a reciprocating motion of a fixed stroke under the drive of the parking drive;

[0009] an actuator connected to the driving member, and the actuator can reciprocate under the driving of the driving member and push the parking pawl to rotate to a parking position meshing with the parking gear;

[0010] A limiter is arranged on the housing of the gearbox and is located at the end of the stroke of the actuator to limit the return stroke of the actuator.

[0011] Furthermore, a gap is reserved between the limiting member and the executing member.

[0012] Furthermore, the limiting member and the housing of the gearbox are made of the same material, and the limiting member is made of high-strength alloy structural steel.

[0013] Further, it comprises: a support plate,

[0014] The support plate is fixed in the gearbox and is spaced apart from the circumferential side surface of the parking gear to form an assembly space for installing the parking pawl and the actuator.

[0015] Furthermore, the actuator includes a push rod mechanism, and the push rod mechanism includes:

[0016] A push rod, which includes an integrally formed push bracket and a drive rod;

[0017] A push block, which can be slidably sleeved on the push rod, and the push block is connected to the driving member and can reciprocate under the drive of the driving member;

[0018] An elastic member connected between the pushing bracket and the pushing block;

[0019] Wherein, the pushing bracket is rotatably connected with a first roller and a second roller arranged longitudinally, the first roller can abut against the support plate, and the second roller can abut against the parking pawl.

[0020] Furthermore, the push rod mechanism further comprises: a bushing for limiting the push block,

[0021] The bushing is arranged at the end of the driving rod away from the pushing bracket.

[0022] The bushing is provided with a first contact portion, and the first contact portion can contact the limiting member.

[0023] Furthermore, the pushing bracket comprises a U-shaped structure formed integrally by two parallel mounting plates.

[0024] The two mounting plates are respectively provided with corresponding mounting holes.

[0025] Furthermore, the push rod mechanism also includes a fixing pin.

[0026] The first roller and the second roller are sleeved on the fixing pin, and the fixing pin can be inserted into the mounting hole and installed so that the first roller and the second roller are both rotatably arranged between the two mounting plates.

[0027] Furthermore, the two ends of the fixing pin are respectively provided with a connecting hole and a first limiting portion.

[0028] The connecting hole can extend out of one of the mounting plates of the pushing bracket, so that the fixing pin is fixedly connected to the pushing bracket through the connecting hole;

[0029] The fixing pin abuts against another mounting plate in the pushing bracket through the first limiting portion.

[0030] Furthermore, a second limiting portion is provided on one side of the pushing bracket close to the fixing pin.

[0031] The second limiting portion abuts against the first limiting portion and is matched with the first limiting portion.

[0032] The advantages and beneficial effects of the present application are as follows: a parking device is provided, which is arranged in the gearbox of the vehicle, and the parking device includes: a parking gear, a parking pawl, a driving member, an actuator and a limit member; on the one hand, a limit member is provided at the end of the stroke of the actuator executing the parking position to limit the return stroke of the actuator, so as to prevent the actuator from being damaged by rebounding due to force, and at the same time, the limit member can be made of alloy structural steel, which helps to improve the mechanical strength of the parking device and effectively absorb the rebound energy; on the other hand, by designing the pushing bracket and the driving rod in the push rod mechanism as an integrated structure, the assembly is simple, the integration is higher, and the risk of assembly loosening due to force during use is reduced; on the other hand, the double rollers are installed on the pushing bracket by a fixing pin, and an anti-rotation limit structure is provided to prevent the fixing pin from rotating, loosening, etc. under force, and the reliability is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limiting of the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0034] Figure 1 This is a schematic diagram of the overall structure of a parking device in one embodiment of the present application;

[0035] Figure 2 This is a schematic diagram of the structure of a parking device (side view) in one embodiment of the present application;

[0036] Figure 3 for Figure 2 Schematic diagram of the cross-section structure from a medium AA perspective;

[0037] Figure 4 This is a schematic structural diagram (side view) of a push rod mechanism in one embodiment of the present application;

[0038] Figure 5 for Figure 4 Schematic diagram of the cross-section structure from the EE perspective;

[0039] In the figure: 1. parking gear; 2. parking pawl; 3. support plate; 4. actuator; 5. driving member; 6. limit member;

[0040] 41. Bushing; 42. Push block; 43. Elastic member; 44. Push rod; 45. Fixing pin; 441. Driving rod; 442. Push bracket; 443. Second limiting portion; 451. First limiting portion; 452. Connecting hole; 461. First roller; 462. Second roller; 4421. First mounting plate; 4422. Second mounting plate. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in combination with the specific embodiments of the utility model and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] The technical solutions provided by various embodiments of the present application are described in detail below in conjunction with the accompanying drawings.

[0043] Reference Figures 1 to 5 As shown, in one embodiment of the present application, a parking device is provided, which is arranged in a gearbox of a vehicle, and comprises: a parking gear 1, a parking pawl 2, an actuator 4, a driving member 5 and a limiting member 6;

[0044] The parking gear 1 is linked to the power transmission shaft of the gearbox and moves synchronously with the transmission system in the vehicle. When the transmission system and the parking gear 1 are locked, the vehicle enters the parking state. The parking pawl 2 is rotatably arranged in the gearbox around a fixed axis and can be rotated to a parking position meshed with the parking gear 1, that is, parking is achieved when the meshing end of the parking pawl 2 is meshed with the parking gear 1, and parking is achieved when the meshing end of the parking pawl 2 is disengaged from the parking position (the parking state is released). The driving member 5 is fixedly connected to the parking drive of the vehicle and performs a fixed stroke reciprocating motion under the drive of the parking drive.

[0045] The actuator 4 is connected to the driving member 5, and the actuator 4 can reciprocate under the drive of the driving member 5. The actuator 4 rolls with the parking pawl 2 and pushes the parking pawl 2 to rotate to the parking position engaged with the parking gear 1; the limiter 6 is arranged on the housing of the gearbox, and the limiter 6 is located at the end of the stroke of the actuator 4 to limit the return stroke of the actuator 4, for example Figure 1 As shown, when the parking pawl 2 is disengaged from the parking position, the actuator 4 will return to the right under the drive of the driving member 5 , so the limiting member 6 can be set at the end of the return stroke of the actuator 4 .

[0046] From the above, it can be seen that the present application limits the return stroke of the actuator by setting a limit member at the end of the actuator when it executes the parked position, thereby preventing the actuator from being damaged due to force rebound, improving the mechanical strength of the parking device, and being able to effectively absorb the rebound energy.

[0047] It is worth noting that the fixed stroke in the embodiment of the present application refers to a fixed distance that the driving member 5 drives the actuator 4 to reciprocate when the vehicle switches from the parked position to the unparked position; the present application does not limit the size, shape, installation position, connection relationship and length of the fixed stroke of each component in the parking device, and the above content is only an exemplary description.

[0048] In some embodiments, Figure 1 As shown, a gap is reserved between the limit member 6 and the actuator 4, thereby providing a certain margin space for the return movement of the actuator 4, that is, the movement performed by the actuator 4 when switching from the parking position to the unparked position when performing the unparked operation.

[0049] In some embodiments, the limit member 6 and the gearbox housing are made of the same material, for example, an aluminum material structure. Preferably, the limit member 6 can be made of high-strength alloy structural steel, thereby absorbing most of the rebound impact energy and preventing the actuator 4 from colliding with surrounding parts and causing damage to the surrounding parts, thereby improving the service life and reliability of the parking device.

[0050] In some embodiments, the parking device includes: a support plate 3, which is fixed in the gearbox and spaced apart from the circumferential side of the parking gear 1 to form an assembly space for installing the parking pawl 2 and the actuator 4; Figure 1 As shown, the circumferential side surface of the parking gear 1 is the side surface of the parking gear 1 having the gear, and the meshing end of the parking pawl 2 and the pushing bracket 442 of the actuator 4 can be installed in the above-mentioned assembly space.

[0051] In some embodiments, reference Figures 2 to 4As shown, the actuator 4 includes a push rod mechanism, which includes: a push block 42, an elastic member 43 and a push rod 44. The push rod 44 includes an integrally formed push bracket 442 and a drive rod 441, that is, the drive end and the actuator end of the push rod 44 adopt an integrated structural design, which has higher mechanical strength and reduces the assembly process and the risk of assembly looseness;

[0052] The push block 42 can be slidably mounted on the push rod 44, and the push block 42 is connected to the driving member 5 and can reciprocate under the drive of the driving member 5; the elastic member 43 is connected between the pushing bracket 442 and the push block 42, so when the push block 42 moves, the push block 42 will act on the pushing bracket 442 through the elastic member 43. If the pushing bracket 442 cannot be driven, the push block 42 will move relative to the push rod 44. Preferably, the elastic member 43 is a spring mounted on the driving rod 441; wherein, the pushing bracket 442 is rotatably connected with a first roller 461 and a second roller 462 arranged longitudinally, the first roller 461 can abut against the support plate 3, and the second roller 462 can abut against the parking pawl 2.

[0053] In the embodiment of the present application, one end of the driving member 5 can be hinged to the push block 42, and the driving member 5 is the power mechanism of the push rod mechanism. During the movement of the driving member 5, it drives the push block 42 to move. For example, when performing the parking operation, the driving member 5 drives the push block 42 to move. Figure 1 The push block 42 moves with the driving member 5, and its action can also be a swinging action to the left.

[0054] In some preferred embodiments, Figure 3 and Figure 4 As shown, the push rod mechanism also includes: a bushing 41 for limiting the push block 42, the bushing 41 is arranged at the end of the driving rod 441 away from the pushing bracket 442, the bushing 41 is provided with a first contact portion, the first contact portion can contact with the limiting member 6 over a large area, and reduce the impact pressure when the push rod mechanism is hit, so as to prevent the limiting member 6 from being damaged by the impact.

[0055] In some preferred embodiments, Figure 4 and Figure 5 As shown, the push bracket 442 includes a U-shaped structure formed by two parallel mounting plates, and the two mounting plates are respectively provided with corresponding mounting holes. For example, the first mounting plate 4421 and the second mounting plate 4422 can form a U-shaped structure together, and the first mounting plate 4421 and the second mounting plate 4422 are both provided with mounting holes; of course, the first mounting plate 4421 and the second mounting plate 4422 can be designed to be the same or different, but the positions of the mounting holes should be symmetrical to facilitate the installation of the fixing pin 45.

[0056] In some embodiments, the push rod mechanism further includes a fixing pin 45, and the first roller 461 and the second roller 462 are sleeved outside the fixing pin 45. The fixing pin 45 can be inserted into the mounting holes of the first mounting plate 4421 and the second mounting plate 4422 and installed so that the first roller 461 and the second roller 462 are both rotatably arranged between the two mounting plates. By setting the above two rollers, the support plate 3 and the parking pawl 2 are in rolling contact, which can effectively reduce the loss of parts during the transmission process, making the transmission action of the entire device smoother.

[0057] In some preferred embodiments, the two ends of the fixing pin 45 are respectively provided with a connecting hole 452 and a first limiting portion 451, and the connecting hole 452 can extend out of one of the mounting plates of the pushing bracket 442, so that the fixing pin 45 is fixedly connected to the pushing bracket 442 through the connecting hole 452; the fixing pin 45 abuts against the other mounting plate in the pushing bracket 442 through the first limiting portion 451. Figure 5 In the figure, the first limiting portion 451 of the fixing pin 45 abuts against the second mounting plate 4422, so that it can be stuck in the corresponding mounting position, and the connecting hole 452 of the fixing pin 45 extends out of (higher than) the first mounting plate 4421, thereby ensuring that when the fixing pin 45 is riveted, the position of the pressing head is limited and will not be pressed onto the mounting plate, thereby preventing it from being deformed by pressure and allowing the first roller 461 and the second roller 462 to rotate flexibly.

[0058] Furthermore, if Figure 3 and Figure 4 As shown, a second limiting portion 443 is provided on one side of the push bracket 442 close to the fixing pin 45, and the second limiting portion 443 abuts against the first limiting portion 451 and is adapted to the first limiting portion 451. For example, the first limiting portion 451 can be designed as a structure tangent to the contact surface of the second limiting portion 443, thereby the first limiting portion 451 and the second limiting portion 443 can cooperate to achieve the rotation stop and limit of the fixing pin 45, prevent it from loosening during the force application process, and improve reliability.

[0059] It can be seen that the parking device of the present application can effectively cope with the complex working conditions in the following implementation schemes:

[0060] Case 1: The parking gear performs the parking operation with a rotation speed. For vehicles equipped with an electronic parking system, it is allowed to execute the parking command at a low speed. When the car driver mistakenly performs the parking operation, there is still a rotation speed on the transmission shaft, and the parking gear 1 will rotate driven by the transmission shaft. At this time, the parking driver executes the parking command, driving the driving member 5 to drive the actuator 4 to move to the parking position, and the actuator 4 pushes the meshing end of the parking pawl 2 to move in the direction of the parking gear 1. In this case, although the parking device will be impacted by a large amount of rebound energy, since the application is provided with a limiter 6, it can be used to limit the return stroke of the actuator 4 to prevent the actuator from being damaged or failing due to force rebound. At the same time, the limiter 6 can be made of alloy structural steel, which helps to improve the mechanical strength of the parking device and effectively absorb the rebound energy, further improving the service life and reliability of the entire parking device.

[0061] Case 2: The parking gear performs the parking-out operation with torque. When the vehicle is parked on a slope and the parking device changes from the parked state to the parked-out state, the vehicle's own gravity generates a force component that goes down the slope. The torque generated by this force component acts on the tire, and the torque at the wheel end is transmitted back to the drive shaft through the gearbox. At this time, there is torque on the parking gear 1, and the parking pawl 2 is in the parking position, and there is an interaction force between it and the parking gear 1. In this case, at the moment of executing the parking-out operation, the force of the parking gear 1 on the parking pawl 2 is transmitted to the actuator 4, causing the actuator 4 to rebound instantly and hit the limiter 6, thereby limiting the return stroke of the actuator 4 and absorbing most of the rebound energy, thereby improving the reliability of the entire parking device.

[0062] In summary, the present embodiment proposes a parking device, which is arranged in the gearbox of the vehicle, and includes: a parking gear, a parking pawl, a driving member, an actuator and a limit member; on the one hand, a limit member is provided at the end of the stroke of the actuator when the actuator executes the parking position, so as to limit the return stroke of the actuator, so as to prevent the actuator from being damaged due to force rebound, and at the same time, the limit member can be made of alloy structural steel, which helps to improve the mechanical strength of the parking device and effectively absorb the rebound energy; on the other hand, by designing the pushing bracket and the driving rod in the push rod mechanism as an integrated structure, the assembly is simple, the integration is higher, and the risk of assembly loosening due to force during use is reduced; on the other hand, the double rollers are installed on the pushing bracket by a fixing pin, and an anti-rotation limit structure is provided to prevent the fixing pin from rotating, loosening, etc. under force, and the reliability is stronger.

[0063] It should be noted that, in the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and 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 therefore cannot be understood as a limitation on the present invention.

[0064] It should be noted that, in the description of the present utility model, unless otherwise specified, “plurality” means two or more than two.

[0065] In the present invention, unless otherwise clearly specified and limited, the terms such as "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0066] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of further restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0067] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0068] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0069] The above description is only a specific implementation of the present invention. Under the above teaching of the present invention, those skilled in the art can make other improvements or modifications based on the above embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of the present invention, and the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A parking device, characterized in that: The parking device is arranged in a gearbox of a vehicle, and the parking device comprises: A parking gear, which is linked to the power transmission shaft of the gearbox; A parking pawl, which is rotatably disposed in the gearbox about a fixed axis and can be rotated to a parking position meshing with the parking gear; A driving member, which is fixedly connected to the parking drive of the vehicle and performs a reciprocating motion of a fixed stroke under the drive of the parking drive; an actuator connected to the driving member, and the actuator can reciprocate under the driving of the driving member and push the parking pawl to rotate to a parking position meshing with the parking gear; A limiter is arranged on the housing of the gearbox and is located at the end of the stroke of the actuator to limit the return stroke of the actuator.

2. The parking device according to claim 1, characterized in that: A gap is reserved between the limiting member and the executing member.

3. The parking device according to claim 1, characterized in that: The limiting member and the housing of the gearbox are made of the same material, and the limiting member is made of high-strength alloy structural steel.

4. The parking device according to claim 1, characterized in that: include: Support plate, The support plate is fixed in the gearbox and is spaced apart from the circumferential side surface of the parking gear to form an assembly space for installing the parking pawl and the actuator.

5. The parking device according to claim 4, characterized in that: The actuator includes a push rod mechanism, and the push rod mechanism includes: A push rod, which includes an integrally formed push bracket and a drive rod; A push block, which can be slidably sleeved on the push rod, and the push block is connected to the driving member and can reciprocate under the drive of the driving member; An elastic member connected between the pushing bracket and the pushing block; Wherein, the pushing bracket is rotatably connected with a first roller and a second roller arranged longitudinally, the first roller can abut against the support plate, and the second roller can abut against the parking pawl.

6. The parking device according to claim 5, characterized in that: The push rod mechanism further comprises: a bushing for limiting the position of the push block, The bushing is arranged at the end of the driving rod away from the pushing bracket. The bushing is provided with a first contact portion, and the first contact portion can contact the limiting member.

7. The parking device according to claim 5, characterized in that: The push bracket comprises a U-shaped structure formed integrally by two parallel mounting plates. The two mounting plates are respectively provided with corresponding mounting holes.

8. The parking device according to claim 7, characterized in that: The push rod mechanism also includes a fixing pin, The first roller and the second roller are sleeved on the fixing pin, and the fixing pin can be inserted into the mounting hole and installed so that the first roller and the second roller are both rotatably arranged between the two mounting plates.

9. The parking device according to claim 8, characterized in that: The two ends of the fixing pin are respectively provided with a connecting hole and a first limiting portion. The connecting hole can extend out of one of the mounting plates of the pushing bracket, so that the fixing pin is fixedly connected to the pushing bracket through the connecting hole; The fixing pin abuts against another mounting plate in the pushing bracket through the first limiting portion.

10. The parking device according to claim 9, characterized in that: A second limiting portion is provided on one side of the pushing bracket close to the fixing pin. The second limiting portion abuts against the first limiting portion and is matched with the first limiting portion.

Images