CN112977368A

CN112977368A - Parking mechanism and vehicle

Info

Publication number: CN112977368A
Application number: CN201911286201.1A
Authority: CN
Inventors: 张晓军
Original assignee: Beijing Treasure Car Co Ltd
Current assignee: Beijing Treasure Car Co Ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2021-06-18

Abstract

The present disclosure relates to a parking mechanism and a vehicle, the parking mechanism comprises a parking handle (1), a base (2) and a hydraulic locking device (3), the parking handle (1) having a handle end (12) opposite to each other and a connecting end (11) pivotally connected to the base (2), the hydraulic locking device (3) comprises a piston (31), a piston rod (32) and an oil storage cylinder (33) and a working cylinder (34) which are hinged on the base (2) and are communicated with each other in fluid, one end of the piston rod (32) is hinged to the connecting end (11), a control switch valve (35) is opened or closed to allow or cut off the flow of hydraulic oil between the reserve cylinder (33) and the working cylinder (34), so that the piston (31) can move or maintain a position in the working cylinder (34) as the parking handle (1) rotates. Therefore, the parking mechanism provided by the disclosure can realize stepless regulation of parking braking force, and has the advantages of small required operating force and good comfort.

Description

Parking mechanism and vehicle

Technical Field

The present disclosure relates to a parking brake control technique for automobiles, in particular to a parking mechanism and a vehicle.

Background

The automobile parking braking system can ensure the stable and reliable parking of the automobile after the automobile is parked. The parking brake handle, commonly known as a hand brake, is an operating handle of a parking brake system.

In the related art, the parking brake pull handle realizes the switching between the locking state and the unlocking state through the matching of a pawl and a toothed plate, so that the establishment and the release of the parking brake force are realized.

However, when the parking brake pull handle is pulled up, so that the pawl and the toothed plate are meshed, collision is generated, abnormal sound of 'clicking' is generated, the comfort is affected, and the pawl can only stay in a plurality of toothed grooves with limited number and cannot stay at the position between the adjacent toothed grooves, so that if the parking brake force corresponding to the former toothed groove is insufficient, a larger operating force needs to be applied to clamp the pawl into the latter toothed groove to improve the parking brake force, and the comfort is affected; in addition, the parking brake force of the automobile is insufficient, and the automobile is prone to slipping due to the fact that the parking brake force is difficult to achieve for female drivers.

Disclosure of Invention

An object of the present disclosure is to provide a parking mechanism that can achieve stepless adjustment of a parking braking force, and that requires a small operating force and is comfortable.

Another object of the present disclosure is to provide a vehicle that is comfortable when operating in park.

In order to achieve the above object, according to a first aspect of the present disclosure, there is provided a parking mechanism including a parking handle having a handle end and a connection end opposite to each other, a base, and a hydraulic lock device; the base is used for being fixed on a vehicle body, and the parking handle is pivotally connected to the base through the connecting end so as to rotate between a parking position and a driving position; the hydraulic locking device comprises a hydraulic oil cylinder, a piston and a piston rod, wherein the hydraulic oil cylinder is hinged to the base and comprises an oil storage cylinder and a working cylinder which are in fluid communication with each other, the piston is arranged in the working cylinder, one end of the piston rod is hinged to the connecting end of the parking handle, and the other end of the piston rod extends into the working cylinder and is connected with the piston so as to drive the piston to move in the working cylinder through the rotation of the parking handle; wherein an on-off valve having an open state and a closed state is provided in the hydraulic cylinder, the on-off valve allowing flow of hydraulic oil between the reserve cylinder and the working cylinder to enable the piston to move in the working cylinder; in the closed state, the switching valve shuts off the flow of the hydraulic oil between the reserve cylinder and the working cylinder to maintain the position of the piston in the working cylinder.

Optionally, the on-off valve comprises a valve body movable between an open position corresponding to the open state and a closed position corresponding to the closed state, the on-off valve being arranged to: the hydraulic oil providing a force urging the valve body toward the open position when the piston moves in a first direction; the parking handle drives the piston to move along the first direction when rotating from the driving position to the parking position.

Optionally, the cylinder extends in an up-down direction to move the valve body towards the closed position under the influence of its own weight.

Optionally, the parking mechanism comprises an unlocking means movable between a working position, in which it holds the valve body in the open position, and a rest position, in which it is disengaged from the valve body.

Optionally, the working cylinder has a first end and a second end opposite to each other, the piston rod is inserted into the working cylinder from the first end, the working cylinder is communicated with the reserve cylinder through a connecting channel at the second end, the second end is formed with a tapered inner wall, a channel opening of the connecting channel is formed on the tapered inner wall, the caliber size of the tapered inner wall is gradually enlarged in a direction from the channel opening to the first end, and the valve body is arranged in the second end and is configured as a sphere, and the radius size of the sphere is larger than that of the tapered inner wall corresponding to the channel opening.

Alternatively, the reserve tube extends in an up-down direction and has an upper end at which the vent hole is formed and a lower end to which the connection passage is connected.

Optionally, the parking mechanism comprises an actuator for actuating the unlocking means to move from the rest position to the working position and a reset member for providing the unlocking means with a force to move towards the rest position.

Optionally, the second end of the cylinder comprises an end portion having a conical radius dimension smaller than the radius dimension of the ball, the unlocking means comprises a push rod having one end sealingly inserted into the cylinder from the end portion and the other end connected to the actuator for driving the push rod by means of the actuator to push the valve body towards the first end.

Optionally, the actuating member includes a cable and a parking button, the parking button is movably disposed at a handle end of the parking handle to be capable of extending and retracting relative to the parking handle, one end of the cable is connected to the parking button and the other end is connected to the push rod, the reset member has elasticity and abuts between the parking handle and the parking button to provide an elastic force for extending the parking button.

According to a second aspect of the present disclosure, there is provided a vehicle including the parking mechanism described above.

Through the technical scheme, the piston rod is hinged to the parking handle, the working cylinder is hinged to the base, the piston rod can be inserted into or extend out of the working cylinder along with the rotation of the parking handle, the operation switch valve is in an open state, hydraulic oil can flow between the oil storage cylinder and the working cylinder along with the movement of the piston, after the parking handle stops moving, the switch valve is closed, the hydraulic oil in the working cylinder is supported between the piston and the working cylinder, the position of the piston in the working cylinder is kept, the parking handle is locked, stable parking force is provided, the piston can stay at any position in the working cylinder, and the parking handle can rotate to any proper parking position and provide corresponding different parking force. In addition, the driving force required for driving the piston to move in the cylinder is small, and the piston can be stopped at any position, so that the operation is comfortable. Therefore, the parking mechanism can realize stepless regulation of parking braking force, and has the advantages of small required operating force and good comfort. And, based on the beneficial effect of parking mechanism, the comfort level when the vehicle that this disclosure provided is in operation parking is high.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

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

FIG. 1 is a perspective view of a park mechanism provided in accordance with some embodiments of the present disclosure;

FIG. 2 is a schematic view of a parking handle of a parking mechanism transitioning between a park position and a drive position provided in accordance with some embodiments of the present disclosure;

FIG. 3 is a perspective view of another angle of the park mechanism provided in accordance with certain embodiments of the present disclosure, with a hydraulic ram of the park mechanism in section;

FIG. 4 is a cross-sectional view of a hydraulic cylinder of the parking mechanism provided in accordance with certain embodiments of the present disclosure and illustrating a hydraulic fluid flow schematic as the parking handle is moved toward the park position;

FIG. 5 is a cross-sectional view of a hydraulic cylinder of the parking mechanism provided in accordance with certain embodiments of the present disclosure, and illustrates a schematic flow of hydraulic oil as the parking handle is moved toward the drive position.

Description of the reference numerals

1-parking handle, 11-connecting end, 12-handle end, 2-base, 3-hydraulic locking device, 31-piston, 32-piston rod, 33-oil storage cylinder, 331-vent hole, 34-working cylinder, 35-switch valve, 351-valve body, 36-connecting channel, 4-unlocking device, 5-actuating element, 51-inhaul cable, 52-parking button and 6-resetting piece.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise specified, the use of the terms of orientation such as "upper and lower" means up and down in the direction of gravity, and "inner and outer" means inner and outer defined with respect to the profile of the corresponding component itself. The terms "first," "second," and the like, as used herein are intended to distinguish one element from another, and are not necessarily sequential or significant. The following description refers to the accompanying drawings, in which like references in different drawings represent the same or similar elements, unless otherwise indicated. Furthermore, it should be understood that the detailed description and specific examples, while indicating the present disclosure, are intended for purposes of illustration and explanation only and are not intended to limit the present disclosure.

According to a first aspect of the present disclosure, there is provided a parking mechanism, as shown in fig. 1 to 5, including a parking handle 1, a base 2, and a hydraulic lock device 3, the parking handle 1 having a handle end 12 and a connecting end 11 opposite to each other, the base 2 being for fixing to a vehicle body, the parking handle 1 being pivotally connected to the base 2 through the connecting end 11 to rotate between a parking position and a driving position; the hydraulic locking device 3 comprises a hydraulic oil cylinder, a piston 31 and a piston rod 32, wherein the hydraulic oil cylinder is hinged to the base 2 and comprises an oil storage cylinder 33 and a working cylinder 34 which are in fluid communication with each other, the piston 31 is arranged in the working cylinder 34, one end of the piston rod 32 is hinged to the connecting end 11 of the parking handle 1, and the other end of the piston rod extends into the working cylinder 34 and is connected with the piston 31 so as to drive the piston 31 to move in the working cylinder 34 through the rotation of the parking handle 1; wherein the hydraulic cylinder is provided therein with an on-off valve 35 having an open state and a closed state, the on-off valve 35 in the open state allowing a flow of hydraulic oil between the reserve tube 33 and the working tube 34 to enable the piston 31 to move in the working tube 34; in the closed state, the on-off valve 35 cuts off the flow of hydraulic oil between the reserve tube 33 and the working tube 34 to maintain the position of the piston 31 in the working tube 34.

Through the technical scheme, the piston rod 32 is hinged to the parking handle 1, the working cylinder 34 is hinged to the base 2, the piston rod 32 can be inserted into or extend out of the working cylinder 34 along with the rotation of the parking handle 1, the operating switch valve 35 is in an open state, hydraulic oil can flow between the oil storage cylinder 33 and the working cylinder 34 along with the movement of the piston 31, after the parking handle 1 stops moving, the switch valve 35 is closed, the hydraulic oil in the working cylinder 34 is supported between the piston 31 and the working cylinder 34, so that the position of the piston 31 in the working cylinder 34 is maintained, the parking handle 1 is locked to provide stable parking force, and the piston 31 can stay at any position in the working cylinder 34, so that the parking handle 1 can rotate to any suitable parking position and provide corresponding different parking forces to meet different parking environments. Further, the driving force required to move the driving piston 31 in the cylinder 34 is small, and the driving piston can be stopped at an arbitrary position, and the operation is comfortable. Therefore, the parking mechanism can realize stepless regulation of parking braking force, and has the advantages of small required operating force and good comfort.

The piston rod 32 is hinged to the connecting end 11 of the parking handle 1, the hydraulic oil cylinder is hinged to the base 2, hinged shafts of the piston rod 32 and the hydraulic oil cylinder are parallel to each other, the whole hydraulic locking device 3 rotates along with the rotation of the parking handle 1 relative to the base 2, and the piston rod 32 and the working cylinder 34 are always connected between the base 2 and the parking handle 1 in a supporting mode to provide holding force for the parking handle 1 during parking. It should be noted that the switching valve 35 cuts off the flow of hydraulic oil between the reservoir 33 and the working cylinder 34 to maintain the position of the piston 31 in the working cylinder 34, which means that the piston 31 is prevented from moving towards the hydraulic oil, i.e. the parking handle 1 is prevented from rotating towards the hydraulic oil in the working cylinder 34, and the piston 31 can be maintained in the position in the working cylinder 34 without external force; that is, the parking position can be reached by the parking handle 1 rotating in a direction away from the hydraulic oil in the cylinder 34, and the traveling position can be reached by the parking handle 1 rotating in a direction close to the hydraulic oil in the cylinder 34.

According to some embodiments of the present disclosure, the on-off valve 35 includes a valve body 351, the valve body 351 being movable between an open position corresponding to an open state and a closed position corresponding to a closed state, the on-off valve 35 being configured to: when the piston 31 moves in a first direction, the hydraulic oil provides a force that urges the valve body 351 toward an open position; the parking lever 1 drives the piston 31 to move in a first direction when rotating from the driving position to the parking position. This first direction is the direction in which the piston 31 moves away from the hydraulic oil in the cylinder 34. As shown in fig. 4, when the piston 31 moves in the first direction, a negative pressure is formed between the piston 31 and the hydraulic oil, causing the hydraulic oil to flow from the reservoir 33 into the working cylinder 34, so that the hydraulic oil can push the valve body 351 from the closed position toward the open position, and when the valve body 351 is in the open position, the on-off valve 35 is in the open state, and the hydraulic oil flows until the piston 31 stops moving in synchronization with the parking handle 1, and the negative pressure disappears. The valve body 351 is then urged to a closed position, blocking the flow of hydraulic oil, and the piston 31 is able to remain in position in the cylinder 34.

Alternatively, the cylinder 34 may extend in the up-down direction so that the valve body 351 is moved toward the closed position by its own weight. Correspondingly, the open position is above and the closed position is below, hydraulic oil enters from the lower end of the working cylinder 34, so that the valve body 351 is pushed to the open position, and when the piston 31 stops moving and the negative pressure disappears, the valve body 351 can fall to the closed position under the action of self gravity to prevent the hydraulic oil from flowing.

According to some embodiments of the present disclosure, as shown in fig. 4 and 5, the parking mechanism includes an unlocking means 4, the unlocking means 4 being movable between a working position, in which the unlocking means 4 holds the valve body 351 in an open position, and a rest position, in which the unlocking means 4 is disengaged from the valve body 351. In this way, when the parking handle 1 is to be rotated from the parking position towards the driving position, i.e. when the valve body 351 is in the closed position, the unlocking means 4 can be actuated from the rest position to the operating position to push the valve body 351 to the open position, allowing the flow of hydraulic oil from the working cylinder 34 towards the reservoir 33, thus enabling the parking handle 1 to reach the driving position from the parking position.

According to some embodiments of the present disclosure, as shown in fig. 1 to 5, the working cylinder 34 has a first end and a second end opposite to each other, the piston rod 32 is inserted into the working cylinder 34 from the first end, the working cylinder 34 communicates with the reserve cylinder 33 at the second end through a connecting passage 36, the second end is formed with a tapered inner wall on which a passage opening of the connecting passage 36 is formed, a bore size of the tapered inner wall is gradually enlarged in a direction from the passage opening toward the first end, and the valve body 351 is provided in the second end and is configured as a sphere having a radius size larger than a radius size of the tapered inner wall corresponding to the passage opening. Here, it can be understood that the on-off valve 35 is composed of a tapered inner wall, a connecting passage 36, and a ball together. Thus, an annular engagement surface may be formed between the ball and the tapered inner wall to divide the cylinder 34 into a first chamber adjacent the first end and a second chamber adjacent the second end, the piston 31 being located in the first chamber and the port of the connecting passage 36 being located in the second chamber, when the piston 31 is moved towards the first end, a negative pressure is formed between the piston 31 and the hydraulic fluid urging the ball towards the first end to an open position, at which time the ball is separated from the tapered inner wall and hydraulic fluid can flow from the reservoir 33 into the second chamber of the cylinder 34 and then the ball can be urged towards the second end to a closed position forming an annular engagement surface with the tapered inner wall, or, as described above, the ball moves under its own weight to a closed position separating the first and second chambers, preventing flow of hydraulic fluid.

Alternatively, as shown in fig. 4 and 5, the reserve tube 33 may extend in the up-down direction and have an upper end and a lower end, the reserve tube 33 is formed with a vent hole 331 at the upper end, and the connecting passage 36 is connected to the lower end of the reserve tube 33. The vent 331 maintains a balance of air pressure in the reservoir 33, and when the piston 1 moves away from the hydraulic fluid in the cylinder 34 to form a negative pressure with the hydraulic fluid, the hydraulic fluid can smoothly flow into the cylinder 34 from the reservoir 33, and the connecting passage 36 is located at the lower end, and when the parking handle 1 moves toward the parking position, the hydraulic fluid can be urged to flow into the cylinder 34 from the reservoir 33 by using a difference in the fluid levels of the hydraulic fluid in the reservoir 33 and the cylinder 34, thereby reducing the force for rotating the parking handle 1 and improving comfort. Therefore, when the cylinder 34 extends in the up-down direction and the valve body 351 moves toward the closed position under its own weight, it is necessary to design the liquid amounts of the hydraulic oil in the reservoir cylinder 33 and the cylinder 34 so as to satisfy: when the parking handle 1 is held at the parking position, the gravity of the valve body 351 is greater than the thrust force to be generated by the hydraulic oil, including the thrust force due to buoyancy and the pressure difference between the liquid surfaces, so that it can be held at the closed position.

According to some embodiments of the present disclosure, as shown in fig. 1 to 5, the parking mechanism includes an actuator 5 and a reset member 6, the actuator 5 is used for actuating the unlocking device 4 to move from the rest position to the working position, and the reset member 6 is used for providing a force for moving the unlocking device 4 towards the rest position. Thus, the operating actuator 5 can keep the unlocking device 4 in the operating position, so that the valve body 35 is in the open state, allowing hydraulic oil to flow into the reservoir 33 as the parking handle 1 is rotated from the parking position to the driving position, and when the parking handle 1 is moved to the driving position, the actuator 5 is released and the reset element 6 can drive the actuator 5 back to the rest position.

According to some embodiments of the present disclosure, as shown in fig. 4 and 5, the second end of the cylinder 34 includes an end portion having a tapered radius dimension smaller than that of the sphere, the unlocking means 4 includes a push rod having one end sealingly inserted into the cylinder 34 from the end portion and the other end connected to the actuator 5 to drive the push rod by the actuator 5 to push the valve body 351 toward the first end. The push rod can move towards the first end under the action of the actuating piece 5, so that the ball is pushed towards the first end, the ball is separated from the conical inner wall, and hydraulic oil can flow through a gap between the ball and the conical inner wall. The actuator 5 is operated to maintain the push rod in the operative position and thereby maintain the gap between the ball and the tapered inner wall.

Alternatively, the actuating member 5 includes a cable 51 and a parking button 52, the parking button 52 is movably disposed at the grip end 12 of the parking handle 1 to be capable of being extended and retracted with respect to the parking handle 1, one end of the cable 51 is connected to the parking button 52 and the other end is connected to the push rod, and the restoring member 6 has elasticity and abuts between the parking handle 1 and the parking button 52 to provide elasticity for extending the parking button 52. Wherein, a channel can be arranged in the parking handle 1, the cable 51 is accommodated in the channel, which is not only neat, but also beneficial to maintaining the shape of the cable 51, so that the driving force of the parking button 52 to the unlocking device 4 can be efficiently transmitted. The cable 51 may include a wire that can be smoothly moved inside the sheath, and a sheath that is smooth and wear-resistant inside, and can protect the wire and reduce noise. The restoring member 6 may be constructed in various forms, such as a spring as shown in fig. 1 to 3, which are easily implemented by those skilled in the art and will not be described herein.

According to a second aspect of the present disclosure, a vehicle is provided, which includes the parking mechanism described above, and which is highly comfortable when operating for parking.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. A parking mechanism, characterized by comprising:

a parking handle (1), the parking handle (1) having a handle end (12) and a connecting end (11) opposite to each other,

a base (2), the base (2) being adapted to be fixed to a vehicle body, the parking handle (1) being pivotally connected to the base (2) by the connecting end (11) for rotation between a parking position and a driving position; and

the hydraulic locking device (3) comprises a hydraulic oil cylinder, a piston (31) and a piston rod (32), the hydraulic oil cylinder is hinged to the base (2) and comprises an oil storage cylinder (33) and a working cylinder (34) which are in fluid communication with each other, the piston (31) is arranged in the working cylinder (34), one end of the piston rod (32) is hinged to the connecting end (11) of the parking handle (1), and the other end of the piston rod extends into the working cylinder (34) and is connected with the piston (31) so as to drive the piston (31) to move in the working cylinder (34) through the rotation of the parking handle (1);

wherein an on-off valve (35) is provided in the hydraulic ram having an open state and a closed state, in the open state the on-off valve (35) allowing a flow of hydraulic oil between the reservoir cylinder (33) and the working cylinder (34) such that the piston (31) is movable in the working cylinder (34); in the closed state, the on-off valve (35) cuts off the flow of the hydraulic oil between the reserve cylinder (33) and the working cylinder (34) to maintain the position of the piston (31) in the working cylinder (34).

2. Parking mechanism according to claim 1, characterized in that said on-off valve (35) comprises a valve body (351), the valve body (351) being movable between an open position corresponding to said open state and a closed position corresponding to said closed state, said on-off valve (35) being arranged: the hydraulic oil providing a force urging the valve body (351) towards the open position when the piston (31) moves in a first direction;

the parking handle (1) drives the piston (31) to move along the first direction when rotating from the driving position to the parking position.

3. Parking mechanism according to claim 2, characterized in that the working cylinder (34) extends in an up-down direction such that the valve body (351) moves towards the closed position under the influence of its own weight.

4. Parking mechanism according to claim 2 or 3, characterized in that it comprises unlocking means (4), which unlocking means (4) are movable between a working position, in which said unlocking means (4) hold said valve body (351) in said open position, and a rest position, in which said unlocking means (4) are disengaged from said valve body (351).

5. Parking mechanism according to claim 4, wherein the working cylinder (34) has a first end and a second end opposite to each other, the piston rod (32) being inserted into the working cylinder (34) from the first end, the working cylinder (34) communicating with the reserve cylinder (33) at the second end through a connecting channel (36), the second end being formed with a conical inner wall on which a passage opening of the connecting channel (36) is formed, the bore size of the conical inner wall diverging in a direction from the passage opening towards the first end, the valve body (351) being arranged in the second end and being configured as a sphere having a radius size larger than the radius size of the conical inner wall corresponding at the passage opening.

6. The parking mechanism according to claim 5, wherein the reserve tube (33) extends in the up-down direction and has an upper end and a lower end, the reserve tube (33) is formed with a vent hole (331) at the upper end, and the connecting passage (36) is connected to the lower end of the reserve tube (33).

7. Parking mechanism according to claim 5, characterized in that it comprises an actuator (5) for actuating said unlocking means (4) from said rest position to said work position and a reset element (6) for providing said unlocking means (4) with a force moving towards said rest position (6).

8. Parking mechanism according to claim 7, wherein the second end of the operating cylinder (34) comprises an end portion (341) with a conical radius dimension smaller than the radius dimension of the ball, the unlocking means (4) comprising a push rod with one end sealingly inserted into the operating cylinder (34) from the end portion (341) and the other end connected to the actuator (5) to be driven by the actuator (5) to push the valve body (351) towards the first end.

9. The parking mechanism according to claim 8, wherein the actuator (5) includes a cable (51) and a parking button (52), the parking button (52) is movably provided at a grip end (12) of the parking handle (1) to be extendable and retractable with respect to the parking handle (1), one end of the cable (51) is connected to the parking button (52) and the other end is connected to the push rod, and the reset member (6) has elasticity and abuts between the parking handle (1) and the parking button (52) to provide elasticity for extending the parking button (52).

10. A vehicle further characterized by comprising a parking mechanism as claimed in any one of claims 1-9.