CN109404446B

CN109404446B - Parking executor and vehicle that has it

Info

Publication number: CN109404446B
Application number: CN201811608779.XA
Authority: CN
Inventors: 崔奇; 郑春雨; 王彬; 张克谦; 乔君辉; 孙毅威; 张萌; 王新; 季大民; 刘军
Original assignee: Exquisite Automotive Systems Co Ltd
Current assignee: Exquisite Automotive Systems Co Ltd
Priority date: 2018-12-27
Filing date: 2018-12-27
Publication date: 2020-07-28
Anticipated expiration: 2038-12-27
Also published as: CN109404446A

Abstract

The invention provides a parking actuator and a vehicle with the same, wherein the parking actuator comprises: a cylinder provided with a piston; a transmission, the transmission comprising: the first sleeve is sleeved on the rod and is in threaded fit with the rod, and the first sleeve is matched with the piston and is used for driving the piston to move relative to the cylinder body; the second external member is sleeved on the rod piece, is in threaded fit with the rod piece and can be released or braked, when the parking actuator executes a parking action, the screw rod drives the piston to move towards the parking direction extending out of the cylinder body through the first external member, and the second external member can be timely braked to drive the rod piece to axially move along the parking direction through the threaded fit action of the screw rod. Therefore, the second kit is used for braking or releasing timely, so that the working efficiency of the parking actuator is improved, the clamping action or the releasing action is rapidly executed, and the safety and the reliability of the parking actuator are improved.

Description

Parking executor and vehicle that has it

Technical Field

The invention relates to the technical field of vehicles, in particular to a parking actuator and a vehicle with the same.

Background

In the related technology, when a parking actuator of a vehicle is parked, a screw rod and a threaded sleeve form a spiral transmission mechanism, and the screw rod drives the threaded sleeve to push a piston to move, so that the piston drives a friction plate to clamp a brake disc to realize a parking function. However, when the motor drives the screw rod to rotate reversely and the screw rod enables the screw sleeve to retract, the piston does not provide clamping force any more and the parking is released; to reduce the residual drag torque, the screw is retracted for an idle stroke after the parking release, which results in an increase in the next parking clamping stroke. Due to the existence of idle stroke, the parking clamping and releasing time is prolonged, and the use experience and the brake response speed in emergency braking are influenced.

Disclosure of Invention

In view of this, the present invention is directed to a parking actuator with a fast response speed.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

a parking actuator comprising: a cylinder configured with a piston; a transmission, the transmission comprising: the first sleeve is sleeved on the rod and is in threaded fit with the rod, and the first sleeve is matched with the piston and is used for driving the piston to move relative to the cylinder body; and the second sleeve is sleeved on the rod and is in threaded fit with the rod, the second sleeve can be released or braked, when the parking actuator performs a parking action, the screw rod drives the piston to move towards a parking direction extending out of the cylinder body through the first sleeve, and the second sleeve can be timely braked to drive the rod to axially move along the parking direction through the threaded fit action with the screw rod.

According to some embodiments of the invention, the parking actuator further comprises: a damping structure arranged to release or brake the second sleeve.

According to some embodiments of the invention, the damping structure is disposed within the cylinder.

According to some embodiments of the invention, the parking actuator further comprises: a sliding bearing secured within the cylinder, the damping structure disposed between the sliding bearing and the second member.

According to some embodiments of the invention, the damping structure is annular.

According to some embodiments of the invention, the outer circumferential surface of the second sleeve is provided with a groove, the damping structure is provided in the groove, and the damping structure is in contact with a wall of the groove and an inner circumferential surface of the sliding bearing.

According to some embodiments of the invention, the groove is opened at a middle position of the outer circumferential surface of the second sleeve.

According to some embodiments of the invention, the damping structure comprises a damping rubber ring.

According to some embodiments of the invention, a thrust needle bearing is provided between the sliding bearing and the wall of the cylinder block.

Compared with the prior art, the parking actuator has the following advantages:

according to the parking actuator disclosed by the embodiment of the invention, the second kit is used for braking or releasing timely, so that the working efficiency of the parking actuator is improved, and the clamping action or the releasing action is rapidly executed, so that the safety and the reliability of the parking actuator are improved.

Another object of the present invention is to provide a vehicle including the parking actuator.

The vehicle and the parking actuator have the same advantages compared with the prior art, and the detailed description is omitted.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 is a sectional view of a parking actuator according to an embodiment of the present invention.

Description of reference numerals:

a parking actuator 100,

A cylinder 10, a piston 11,

A transmission device 20, a rod 21, a first sleeve 22,

A second sleeve member 30, a groove 31,

Damping structure 40, sliding bearing 50, thrust needle bearing 60.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The invention will be described in detail below with reference to the accompanying figure 1 in conjunction with an embodiment.

The parking actuator 100 according to the embodiment of the present invention includes a cylinder 10, a transmission 20, and a second kit 30.

Specifically, the cylinder 10 is provided with a piston 11, and the transmission 20 includes: the piston type hydraulic cylinder comprises a rod 21 and a first sleeve 22, wherein the first sleeve 22 is sleeved on the rod 21, the first sleeve 22 is in threaded fit with the rod 21, and the first sleeve 22 is matched with the piston 11 and is used for driving the piston 11 to move relative to the cylinder 10. The second sleeve 30 is fitted over the rod 21, the second sleeve 30 is threadedly engaged with the rod 21, the second sleeve 30 can be released or braked, the screw drives the piston 11 to move in the parking direction extending out of the cylinder 10 through the first sleeve 22 when the parking actuator 100 performs a parking action, and the second sleeve 30 can be timely braked to drive the rod 21 to move axially in the parking direction through the threaded engagement with the screw.

Further, the second member 30 has a braking state and a releasing state, and when the second member 30 is in the braking state, the screw rod can move relative to the second member 30 along the axial direction of the rod 21, that is, the rod 21 can be screwed in toward the side of the piston 11 and can also be screwed out toward the side away from the piston 11. When the second sleeve 30 is in the release state, the second sleeve 30 can rotate along with the rod 21, at this time, the rod 21 cannot move relative to the second sleeve 30 along the axial direction of the rod 21, at this time, the rod 21 can be matched with the first sleeve 22, and the rod 21 can drive the first sleeve 22 to drive the piston 11 to move to the side far away from the second sleeve 30.

It will be appreciated that the parking actuator 100 performs a clamping action when the rod 21 drives the piston 11 upward relative to the cylinder 10, and the parking actuator 100 performs a release action when the rod 21 drives the piston 11 downward relative to the cylinder 10. During the clamping or release action, the second sleeve 30 can be adjusted to a braking or release state depending on the operating state of the parking actuator 100. Wherein the piston 11 may be connected to friction pads for cooperating with brake discs for generating braking forces.

When the parking actuator 100 performs a clamping action, the rod 21 rotates, the second sleeve 30 is in a braking state, the rod 21 moves upward relative to the second sleeve 30, and the rod 21 is engaged with the first sleeve 22, so that the piston 11 engaged with the first sleeve 22 moves upward relative to the cylinder 10 to bring the friction plates into quick proximity with the brake disc. Further, when the clamping force between the friction plate and the brake disc reaches a certain value, the second sleeve 30 is switched to the release state, the second sleeve 30 rotates along with the rod 21, the rod 21 does not move upwards any more, the rod 21 drives the first sleeve 22 in threaded fit with the rod to move upwards, and the first sleeve 22 drives the piston 11 in threaded fit with the rod to move upwards, so that the purpose of clamping the brake disc is achieved.

When the parking actuator 100 executes a releasing action, the rod 21 rotates, the rotating direction of the rod 21 is opposite to the rotating direction of the rod 21 when the parking actuator 100 executes a clamping action, the second sleeve 30 rotates along with the rod 21, the position of the rod 21 relative to the cylinder 10 does not change, the rod 21 drives the first sleeve 22 in threaded fit with the rod to move downwards, the first sleeve 22 moves downwards and is separated from the piston 11, the clamping force between the friction plate and the brake disc is released preliminarily, when the clamping force is released to a certain value, the second sleeve 30 is switched to a braking state, the rod 21 moves downwards relative to the second sleeve 30, and the rod 21 drives the first sleeve 22 to move downwards so as to fulfill the aim of releasing the braking.

It should be noted that, through the threaded cooperation between the rod 21 and the first and

second sleeves

22 and 30, the brake disc is clamped or released quickly, so that the time for clamping and releasing the parking actuator 100 can be effectively shortened, and the safety in use is improved.

According to the parking actuator 100 of the embodiment of the invention, the second kit 30 is used for timely braking or releasing to improve the working efficiency of the parking actuator 100, and the clamping action or the releasing action is rapidly executed, so that the safety and the reliability of the parking actuator 100 are improved.

As shown in fig. 1, in some embodiments of the present invention, the parking actuator 100 further includes: a damping structure 40, the damping structure 40 being arranged for releasing or braking the second kit of parts 30.

In particular, the damping structure 40 can adjust the state of the second kit 30, i.e., the braking state or the release state, through the variation of the damping parameters of the second kit 30 and its surrounding components.

In a further embodiment of the present invention, the damping structure 40 is disposed within the cylinder 10 such that the damping structure 40 may be reasonably disposed within the parking actuator 100, taking up less space, facilitating the engagement of the damping structure 40 with the second member 30.

In some embodiments of the present invention, parking actuator 100 further comprises: a slide bearing 50, the slide bearing 50 being fixed within the cylinder block 10, the damping structure 40 being arranged between the slide bearing 50 and the second sleeve 30. It will be appreciated that the sleeve bearing 50 is fixed to the cylinder block 10, the sleeve bearing 50 remains stationary and the damping structure 40 cooperates with the second sleeve 30 and the sleeve bearing 50, the damping structure 40 being capable of exerting a certain frictional force on the second sleeve 30.

Further, since the damping structure 40 is disposed between the sliding bearing 50 and the second sleeve 30, when the friction torque between the rod 21 and the second sleeve 30 is larger than the friction torque between the sliding bearing 50 and the damping structure 40, the rod 21 can drive the second sleeve 30 to rotate relative to the sliding bearing 50, and the static friction between the damping structure 40 and the sliding bearing 50 is converted into sliding friction.

In some embodiments of the present invention, the damping structure 40 is annular. The annular configuration allows the damping structure 40 to better cooperate with the second sleeve 30 and the plain bearing 50.

It will be appreciated that the damping structure 40 may be configured in any shape, as required by design, and merely requires switching the second sleeve 30 to the released or braked state under certain conditions.

In a further embodiment of the invention, as shown in fig. 1, a groove 31 is provided on the outer circumferential surface of the second sleeve 30, a damping structure 40 is provided in the groove 31, the damping structure 40 being in contact with the wall of the groove 31 and the inner circumferential surface of the slide bearing 50.

Specifically, the damping structure 40 may be sleeved on the second sleeve 30, and the damping structure 40 protrudes out of the outer peripheral surface of the second sleeve 30 to be in abutting fit with the sliding bearing 50, the damping structure 40 is pressed by the sliding bearing 50 and the groove 31, so that a certain friction force exists between the damping structure 40 and the groove 31, and between the damping structure 40 and the sliding bearing 50, when the friction torque between the damping structure 40 and the groove 31 is greater than the friction torque between the damping structure 40 and the sliding bearing 50, the damping structure 40 rotates along with the second sleeve 30, and there is sliding friction between the damping structure 40 and the sliding bearing 50.

In some embodiments of the invention, the groove 31 opens at a central position on the outer circumferential surface of the second sleeve 30.

It can be understood that the groove 31 is formed in the middle position, so that the structural strength of the second kit 30 can be effectively ensured, the damping structure 40 is conveniently limited, and the damping structure 40 is effectively prevented from being separated from the groove 31.

In some embodiments of the present invention, the damping structure 40 comprises a damping rubber ring. The damping rubber ring can provide reliable frictional resistance, and the damping rubber ring is simple in structure and convenient to arrange.

In some embodiments of the present invention, a thrust needle bearing 60 is provided between the sliding bearing 50 and the wall of the cylinder block 10.

It can be understood that the thrust needle roller bearing 60 has a good thrust action, so that the reliability between the slide bearing 50 and the cylinder block 10 can be improved by providing the thrust needle roller bearing 60.

In some embodiments of the invention, the pitch of the engagement between the second sleeve 30 and the stem 21 is greater than the pitch of the engagement between the first sleeve 22 and the stem 21, and the engagement threads are calculated to be taken from the locking threshold to facilitate engagement of the second sleeve 30 and the stem 21.

In some alternative embodiments of the present invention, the first sleeve 22 may be a threaded sleeve, and correspondingly, the rod 21 may be a threaded rod, and the second sleeve 30 may be a nut, so that the fit between the first sleeve 22 and the rod 21, and the fit between the second sleeve 30 and the rod 21 are simple and have high reliability.

The clamping process of the parking actuator 100 according to the invention is described below with reference to fig. 1:

the rod member 21 is rotated, the second sleeve member 30 is not rotated due to the damping structure 40, i.e., is fixed with respect to the cylinder body 10, the rod member 21 is screw-engaged with the second sleeve member 30, and the rod member 21 is raised. Since the rod 21 is engaged with the first sleeve 22, the first sleeve 22 is rapidly lifted to push the piston 11 upward, so that the friction plates rapidly approach the brake disk. When the clamping force rises to a certain value, the rod 21 can drive the second sleeve 30 to rotate relative to the sliding bearing 50, at this time, the rod 21 does not rise any more, and the first sleeve 22 moves upward under the action of the rod 21 so as to enable the piston 11 to move upward, thereby achieving the purpose of clamping.

The vehicle according to the embodiment of the present invention includes the parking actuator 100 described above. Through the arrangement of the parking actuator 100, clamping action and releasing action can be rapidly executed, so that the vehicle can be rapidly braked and braked, the requirement of the vehicle on braking can be better met, and the use safety of the vehicle is improved.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. A parking actuator, comprising:

a cylinder configured with a piston;

a transmission, the transmission comprising: the first sleeve is sleeved on the rod and is in threaded fit with the rod, and the first sleeve is matched with the piston and is used for driving the piston to move relative to the cylinder body;

the second sleeve is sleeved on the rod, the second sleeve is in threaded fit with the rod, the second sleeve can be released or braked, when the parking actuator performs a parking action, the rod drives the piston to move towards a parking direction extending out of the cylinder body through the first sleeve, and the second sleeve can be timely braked to drive the rod to axially move along the parking direction through the threaded fit with the rod.

2. The parking actuator of claim 1, further comprising: a damping structure arranged to release or brake the second sleeve.

3. The parking actuator of claim 2, wherein the damping structure is disposed within the cylinder.

4. The parking actuator of claim 2, further comprising: a sliding bearing secured within the cylinder, the damping structure disposed between the sliding bearing and the second member.

5. The parking actuator of claim 4, wherein the damping structure is annular.

6. The parking actuator of claim 5, wherein a groove is provided on an outer circumferential surface of the second sleeve, and the damping structure is provided in the groove, the damping structure being in contact with a wall of the groove and an inner circumferential surface of the sliding bearing.

7. The parking actuator of claim 6, wherein the groove opens at a central position of the outer peripheral surface of the second sleeve.

8. The parking actuator of claim 2, wherein the damping structure comprises a damping rubber ring.

9. The parking actuator of claim 4 wherein a thrust needle bearing is disposed between the slide bearing and a wall of the cylinder.

10. A vehicle, characterized by comprising a parking actuator according to any one of claims 1-9.