Parking locking system and motor vehicle and / or electric vehicle comprising same

Abstract

The present disclosure relates to a parking lock system (100) comprising an actuator and a hydraulic valve (2). The actuating mechanism comprises a shell (1) and a piston (4). A piston chamber (5) is arranged inside the housing, and the piston is arranged in the piston chamber (5) and can move in the locking direction and the unlocking direction in the piston chamber (5). The hydraulic valve (2) is used for controlling the working fluid to flow into or out of the piston chamber (5). The hydraulic valve (2) is directly mounted to the housing (1) of the actuator. The present disclosure also relates to a motor vehicle or an electric vehicle comprising said parking lock system (100).

Description

Technical Field

[0001] Embodiments of the present disclosure relate to a parking lock system and a motor vehicle and / or an electric vehicle including the parking lock system. Background Art

[0002] Vehicles usually include a parking lock system to prevent the vehicle from rolling away when the vehicle is stationary. Existing parking lock systems generally include a parking actuator, which is usually a hydraulic locking cylinder with a brake piston. The hydraulic system can control the flow of working fluid into or out of the hydraulic locking cylinder, thereby driving the brake piston to move between a locked position and an unlocked position. In the locked position, the locking member of the parking lock system locks the output shaft of the transmission in a form-fitting manner, and in the unlocked position, the locking member is pivoted away from the locked position to release the lock.

[0003] It is known that the hydraulic system and the hydraulic locking cylinder of the parking actuator are separately arranged, and fluid pipelines are respectively connected to the hydraulic system and the hydraulic locking cylinder, so that the two are fluidically connected. The working fluid may leak at the connection of the fluid pipeline. In addition, the structure in which the hydraulic system and the hydraulic locking cylinder are separated complicates the design of the parking lock system, increases the space required for installing the parking lock system, and makes the assembly of the parking lock system difficult. Utility Model Content

[0004] Therefore, the present disclosure aims to solve the above-mentioned problems existing in the existing parking lock system, and its purpose is to provide a parking lock system, which has a compact structure, reduces the risk of leakage of the working fluid, reduces the installation space required for the parking lock system, and can be assembled in a simple and cost-saving manner.

[0005] The object is achieved by a parking lock system according to an embodiment of the present disclosure, which includes an actuator and a hydraulic valve. The actuator includes a housing and a piston, and a piston chamber is provided inside the housing. The piston is arranged in the piston chamber of the housing and can move in the piston chamber along a locking direction and an unlocking direction. The hydraulic valve is used to control the flow of working fluid into or out of the piston chamber, and the hydraulic valve is directly mounted to the housing of the actuator.

[0006] Since the hydraulic valve is directly mounted to the housing of the actuator and the piston chamber is also arranged inside the housing, no additional fluid pipeline is required between the hydraulic valve and the piston chamber. This design reduces the risk of leakage of the working fluid, reduces the size of the parking lock system, and simplifies the assembly of the parking lock system.

[0007] The parking lock system according to the present disclosure may also have one or more of the following features alone or in combination.

[0008] According to an optional embodiment of the present disclosure, a hydraulic valve chamber for accommodating a valve body of the hydraulic valve is provided inside the housing. That is, when the hydraulic valve is mounted to the housing of the actuator, the valve body of the hydraulic valve is accommodated in the hydraulic valve chamber. According to this technical solution, the hydraulic valve no longer includes a hydraulic valve housing for accommodating the valve body. The hydraulic valve can thus have a reduced size, and its cost is also reduced. In addition, the overall structure of the parking lock system is also more stable and reliable.

[0009] According to an optional embodiment of the present disclosure, the hydraulic valve is a two-position three-way valve. Thus, different conduction states of the hydraulic valve can respectively allow the working fluid to flow into the piston chamber, prevent the working fluid from flowing into the piston chamber, and allow the working fluid to be discharged from the parking lock system.

[0010] According to an optional embodiment of the present disclosure, a connecting channel is provided inside the housing, and the connecting channel connects the hydraulic valve chamber and the piston chamber fluidly. Thus, the working fluid flows between the hydraulic valve chamber and the piston chamber through the connecting channel.

[0011] According to an optional embodiment of the present disclosure, the housing is further provided with an inflow interface for introducing the working fluid into the hydraulic valve. That is, the working fluid entering the hydraulic valve needs to first pass through the inflow interface provided on the housing.

[0012] According to an optional embodiment of the present disclosure, the housing is further provided with a discharge interface for discharging the working fluid from the hydraulic valve. That is, the working fluid discharged from the hydraulic valve needs to pass through the discharge interface provided on the housing. Optionally, the discharge interface is provided at a mounting surface of the housing for mounting the hydraulic valve.

[0013] According to an optional embodiment of the present disclosure, the hydraulic valve is a ball valve or a slide valve. Preferably, the ball valve or the slide valve is a two-position three-way valve.

[0014] According to an optional embodiment of the present disclosure, the hydraulic valve has a sealing member arranged between the valve body and the hydraulic valve chamber, such as two sealing rings. Through the two sealing rings, the sealing between the valve body and the hydraulic valve chamber is ensured.

[0015] According to an optional embodiment of the present disclosure, a return spring is provided in the housing to urge the piston toward the locking direction. That is, the return spring biases the piston toward the locking direction. When the parking actuator is in a locked state, the piston of the actuator is maintained in the locked position by the biasing force of the return spring. When the parking actuator is unlocked, the hydraulic valve controls the working fluid to flow into the piston chamber, and the piston overcomes the biasing force of the return spring under the hydraulic pressure of the working fluid and moves in the unlocking direction.

[0016] According to an optional embodiment of the present disclosure, the parking lock system further comprises an inflow pipe inserted into the inflow interface. The inflow pipe is used to introduce the working fluid into the parking lock system. Optionally, the inflow pipe has two sealing members, such as sealing rings, respectively arranged at two ends thereof. The two ends of the inflow pipe can be in the form of male connection ends or female connection ends.

[0017] According to an optional embodiment of the present disclosure, the inflow pipe is integrated into the housing, thereby the parking lock system can have a more compact structure.

[0018] According to an optional embodiment of the present disclosure, at least a portion of the housing is made of plastic material.

[0019] The present disclosure also provides a motor vehicle, which includes the parking lock system as described above.

[0020] The present disclosure also provides an electric vehicle, which includes the parking lock system as described above. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and other features and advantages of the present disclosure will become more apparent through the following detailed description of exemplary embodiments in conjunction with the accompanying drawings, and the description and drawings are only for illustrative purposes and are not intended to limit the scope of the present disclosure in any way. In the drawings:

[0022] Figure 1 is a cross-sectional view of a parking lock system according to an embodiment of the present disclosure.

[0023] Figure 2A and Figure 2B The flow paths of the working fluid when the parking lock system is unlocked and locked are respectively shown. DETAILED DESCRIPTION

[0024] In order to make the objectives, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described in detail below in conjunction with the drawings of the embodiments of the present disclosure.

[0025] Unless otherwise defined, the technical terms or scientific terms used herein shall be the ordinary meanings understood by ordinary technicians in the field to which the present disclosure belongs. Similar words such as "one", "one" or "the" used in the patent application specification and claims of the present disclosure do not indicate a quantitative limitation, but indicate the existence of at least one. Similar words such as "include" or "comprise" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. If not otherwise specified, the description of "first" and "second" is only to distinguish the components and does not limit the scope of the present disclosure. Without departing from the scope of the present disclosure, the "first component" can be written as the "second component". The terms "unlocking direction", "locking direction", etc. are all described relative to the drawings of the present disclosure.

[0026] Figure 1 FIG. 1 is a cross-sectional view of a parking lock system 100 according to an embodiment of the present disclosure. Figure 1 As shown, the parking lock system 100 includes a housing 1, a hydraulic valve 2, a hydraulic valve chamber 3, a piston 4, a piston chamber 5, a return spring 6 and an inlet pipe 7. The hydraulic valve chamber 3 and the piston chamber 5 are both located inside the housing 1 and surrounded by the housing 1. At least a portion of the housing 1 is made of plastic material. For example, the housing 1 can be manufactured by injection molding or by machining. In addition to the hydraulic valve 2, Figure 1 The components shown in FIG. 1 constitute an actuator of the parking lock system 100 .

[0027] like Figure 1 As shown, the piston 4 is arranged in the piston chamber 5 and can move in the piston chamber 3 along the locking direction and the unlocking direction. For example, the unlocking direction is Figure 1 The piston 4 is in the upward direction along the axis A, and the locking direction is in the downward direction along the axis A. The lower end of the piston 4 is connected to a rod-shaped member 8 for actuating a locking member (not shown) of the parking lock system. When the piston 4 moves in the locking direction, the rod-shaped member 8 actuates the locking member to lock the output shaft of the transmission in a form-fitting manner, so that the parking lock system 100 is in a locked state. When the piston 4 moves in the unlocking direction, the rod-shaped member 8 actuates the locking member to pivot away from the position of locking the output shaft of the transmission, so that the parking lock system 100 is in an unlocked state. Optionally, the parking lock system 100 may also include a brake member (not shown in the figure), which moves to a stop position in the unlocked state of the parking lock system 100 to brake the rod-shaped member 8, so that the parking lock system 100 remains in an unlocked state.

[0028] A return spring 6 is also provided in the piston chamber 5, the first end of which is fixed to the end wall of the piston chamber 5 and the second end of which is fixed to the end wall of the piston chamber 5 along the locking direction ( Figure 1 The piston 4 is applied with an elastic biasing force in the downward direction of the parking lock system 100. When the parking lock system 100 is in the locked state, the piston 4 is kept in the locked position under the action of the elastic biasing force.

[0029] The hydraulic valve 2 is directly mounted on the housing 1 of the actuator. For example, the hydraulic valve 2 can be fixed to the housing 1 by threaded mounting. Figure 1 As shown, the hydraulic valve 2 includes a drive member 21 (e.g., an electric drive member) and a valve body 22, wherein the valve body 22 is accommodated in the hydraulic valve chamber 3 and is liquid-tightly sealed by, for example, two seals 9 arranged between the valve body 22 and the hydraulic valve chamber 3. The outer surface of the housing 1 above the hydraulic valve chamber 3 constitutes a mounting surface S1 for the hydraulic valve 2. The hydraulic valve chamber 3 is in fluid communication with the piston chamber 5 via a connecting channel 11 arranged inside the housing 1. To this end, a first valve port 3a leading to the connecting channel 11 is provided on the hydraulic valve chamber 3.

[0030] like Figure 1 As shown, the housing 1 is further provided with an inlet port 12 and a discharge port 13, which are respectively used to introduce the working fluid into the hydraulic valve 2 and discharge the working fluid from the hydraulic valve 2. The working fluid is, for example, oil in a gearbox of a vehicle.

[0031] The inflow pipe 7 is inserted into the inflow interface 12. Figure 1 In the illustrated embodiment, both ends of the inflow pipe 7 are male connection ends, and sealing members 9' are respectively provided at both ends thereof to achieve a liquid-tight seal. It is conceivable that both ends of the inflow pipe 7 may also be female connection ends, or may be male connection ends or female connection ends respectively. Correspondingly, the inflow interface 12 may also have different forms. Optionally, the inflow pipe 7 may also be integrally integrated into the housing 1, so that it may have only one end in the form of a male connection end or a female connection end. The inflow interface 12 is fluidically connected to the hydraulic valve chamber 3 via an inflow channel 14. To this end, a second valve port 3b leading to the inflow channel 14 is provided on the hydraulic valve chamber 3. It is conceivable that the inflow interface 12 may also directly lead to the second valve port 3b of the hydraulic valve chamber 3, and the working fluid directly enters the hydraulic valve chamber 3 from the inflow interface 12, so that the inflow pipe 7 and the inflow channel 14 may be omitted.

[0032] The discharge interface 13 is preferably arranged on the mounting surface S1 of the hydraulic valve 2. For this purpose, a third valve port 3c leading to the discharge interface 13 is provided on the hydraulic valve chamber 3.

[0033] exist Figure 1In the illustrated embodiment, the hydraulic valve 2 is a two-position three-way ball valve or a sliding valve. Specifically, the valve body 22 of the hydraulic valve 2 has a first working position P1 and a second working position P2. When the valve body 22 is located at the first working position P1, the first valve port 3a and the second valve port 3b are in fluid communication, while the third valve port 3c is not in communication with the first valve port 3a and the second valve port 3b. The working fluid enters the inflow channel 14 from the inflow pipe 7 and enters the hydraulic valve chamber 3 through the second valve port 3b. Then, the working fluid enters the piston chamber 5 from the hydraulic valve chamber 3 through the first valve port 3a and the connecting channel 11. When the valve body 22 is located at the second working position P2, the first valve port 3a and the third valve port 3c are in fluid communication, while the second valve port 3b is not in communication with the first valve port 3a and the third valve port 3c. Under the action of the return spring 6, the working fluid in the piston chamber 5 returns to the hydraulic valve chamber 3 through the connecting channel 11 and the first valve port 3a. Then, the working fluid is discharged from the hydraulic valve chamber 3 through the third valve port 3c and the discharge interface 13. It is conceivable that the hydraulic valve 2 may also have other forms that meet the requirements of the present disclosure.

[0034] The working process of the parking lock system 100 is described in detail below with reference to the accompanying drawings.

[0035] When the vehicle is parked, the parking lock system 100 is in a parking state, i.e., a locked state. The valve body 22 of the hydraulic valve 2 is located at the second working position P2, and the piston chamber 5 is not filled with working fluid. Under the action of the elastic biasing force of the return spring 6 in the locking direction, the piston 4 is in its locking position, and the rod-shaped member 8 places the locking member of the parking lock system in its locking position, so that it locks the output shaft of the transmission.

[0036] When the parking lock system 100 is unlocked from the parking state, the valve body 22 of the hydraulic valve 2 is driven to the first working position P1, and the second valve port 3b is fluidically connected to the first valve port 3a. Figure 2A The arrows in the figure show the flow path of the working fluid when the parking lock system 100 is unlocked. As shown in the figure, the working fluid enters the inflow channel 14 from the inflow pipe 7 and enters the hydraulic valve chamber 3 through the second valve port 3b. Then, the working fluid enters the connecting channel 11 from the hydraulic valve chamber 3 through the first valve port 3a and finally fills the piston chamber 5. Under the hydraulic action of the working fluid, the piston 4 overcomes the elastic biasing force of the return spring 6 and moves in the unlocking direction (in the upward direction along the axis A in the figure), while driving the rod-shaped member 8 to move with the piston 4. The rod-shaped member 8 thus actuates the locking member to pivot away from the locking position. The piston 4 eventually moves to the unlocking position, and the parking lock system 100 switches to the unlocking state. The brake member moves to the stop position to brake the rod-shaped member 8, so that the parking lock system 100 remains in the unlocking state. At this time, the valve body 22 of the hydraulic valve 2 can return to its second working position P2.

[0037] When the parking lock system 100 performs the parking function, the brake member moves away from the stop position, and the piston 4 moves in the locking direction (downward along the axis A in the figure) under the action of the elastic biasing force of the return spring 6, pushing the working fluid in the piston chamber 5 to leave. Figure 2B The arrows in the figure show the flow path of the working fluid when the parking lock system 100 is locked. As shown in the figure, the working fluid enters the connecting channel 11 from the piston chamber 5 and flows into the hydraulic valve chamber 3 through the first valve port 3a. Then, the working fluid is discharged from the hydraulic valve chamber 3 through the third valve port 3c and from the discharge interface 13. When the piston 4 reaches its locked position, the rod-shaped member 8 drives the locking member of the parking lock system 100 to lock the output shaft of the transmission, and the parking lock system 100 is parked.

[0038] As described above, the parking lock system 100 according to the present disclosure is provided with a hydraulic valve chamber 3 in the housing 1 of the actuator, and the hydraulic valve 2 can be directly mounted to the housing 1, thereby eliminating the connection pipe between the hydraulic valve 2 and the actuator. Therefore, the parking lock system 100 according to the present disclosure has a compact structure, reduces the risk of leakage of the working fluid, reduces the difficulty of assembly and reduces the required installation space. In addition, by eliminating multiple parts, the parking lock system 100 according to the present disclosure also saves production costs.

[0039] The present disclosure also provides a motor vehicle or an electric vehicle, which includes the parking lock system according to the above.

[0040] It should be understood that the structures described above and shown in the drawings are merely examples of the present disclosure, which can be replaced by other structures that exhibit the same or similar functions for obtaining the desired end result. In addition, it should be understood that the embodiments described above and shown in the drawings should be regarded as constituting only non-limiting examples of the present disclosure, and that it can be modified in many ways within the scope of the patent claims.

Claims

1. A parking lock system (100), characterized in that: The parking lock system (100) comprises: Executive agencies, including A housing (1), wherein a piston chamber (5) is arranged inside the housing (1); A piston (4) which is arranged in a piston chamber (5) and is movable in the piston chamber (5) in a locking direction and an unlocking direction; A hydraulic valve (2) for controlling the flow of working fluid into or out of the piston chamber (5), wherein the hydraulic valve (2) is directly mounted to the housing (1) of the actuator. The housing (1) is provided with a hydraulic valve chamber (3) for accommodating a valve body (22) of the hydraulic valve (2); At least a portion of the housing (1) is made of plastic material; The outer surface of the housing (1) above the hydraulic valve chamber (3) constitutes a mounting surface for the hydraulic valve (2); The hydraulic valve chamber (3) is provided with a first valve port (3a), a second valve port (3b) and a third valve port (3c). The valve body (22) of the hydraulic valve (2) has a first working position (P1) and a second working position (P2), wherein when the valve body (22) is located at the first working position (P1), the first valve port (3a) and the second valve port (3b) are fluidically connected, while the third valve port (3c) is not connected to the first valve port (3a) and the second valve port (3b); when the valve body (22) is located at the second working position (P2), the first valve port (3a) and the third valve port (3c) are fluidically connected, while the second valve port (3b) is not connected to the first valve port (3a) and the third valve port (3c).

2. The parking lock system (100) according to claim 1, characterized in that: The hydraulic valve (2) is a two-position three-way ball valve or a slide valve.

3. The parking lock system (100) according to claim 1, characterized in that: A connecting passage (11) is provided inside the housing (1), and the connecting passage (11) connects the hydraulic valve chamber (3) and the piston chamber (5) in fluid communication.

4. The parking lock system (100) according to any one of claims 1 to 3, characterized in that: The housing (1) is also provided with an inflow interface (12) for introducing a working fluid into the hydraulic valve (2); the inflow interface (12) is fluidically connected to the hydraulic valve chamber (3) via an inflow channel (14), or the inflow interface (12) directly leads to the hydraulic valve chamber (3), so that the working fluid directly enters the hydraulic valve chamber (3) from the inflow interface (12).

5. The parking lock system (100) according to any one of claims 1 to 3, characterized in that: The housing (1) is also provided with a discharge interface (13) for discharging the working fluid out of the hydraulic valve (2).

6. The parking lock system (100) according to claim 1, characterized in that: The hydraulic valve (2) has a sealing element (9) arranged between a valve body and a hydraulic valve chamber (3).

7. The parking lock system (100) according to claim 1, characterized in that: The actuator further comprises a return spring (6) arranged on the housing (1), and the return spring (6) urges the piston (4) towards a locking direction.

8. The parking lock system (100) according to claim 4, characterized in that: The parking lock system (100) further comprises an inflow pipe (7) inserted into the inflow interface (12).

9. The parking lock system (100) according to claim 8, characterized in that: The inflow pipe (7) is integrally integrated into the housing (1).

10. A motor vehicle, characterized in that: The motor vehicle comprises a parking lock system (100) according to any one of claims 1 to 9.

11. An electric vehicle, characterized in that: The electric vehicle comprises a parking lock system (100) according to any one of claims 1 to 9.

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