CN213017368U

CN213017368U - Clutch actuating mechanism and vehicle

Info

Publication number: CN213017368U
Application number: CN202021190315.4U
Authority: CN
Inventors: 周芳誉; 陈龙生; 张帅; 朱江
Original assignee: Tsinghua University; Suzhou Automotive Research Institute of Tsinghua University
Current assignee: Tsinghua University; Suzhou Automotive Research Institute of Tsinghua University
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-04-20
Anticipated expiration: 2030-06-23

Abstract

The utility model belongs to the technical field of vehicle, a clutch actuating mechanism and vehicle is disclosed. The clutch actuator includes: a cylinder body; a rotating motor located outside the cylinder block; the transmission assembly penetrates through the cylinder body and is in sealing sliding fit with the inner wall of the cylinder body, one end of the transmission assembly is connected to the output end of the rotating motor through a lead screw and nut pair, the other end of the transmission assembly is connected to the clutch, and the transmission assembly divides an inner cavity of the cylinder body into a first oil cavity and a second oil cavity; and the hydraulic self-locking assembly is respectively communicated with the first oil cavity and the second oil cavity and can control the on-off of hydraulic oil in the cylinder body. The clutch actuating mechanism combines electric control and hydraulic control, has a self-locking function, solves the problem of low efficiency of the transmission mode of the existing electric control clutch actuating mechanism, and ensures that the clutch actuating mechanism assists to ensure the efficient transmission of a ball screw pair by arranging a hydraulic self-locking assembly.

Description

Clutch actuating mechanism and vehicle

Technical Field

The utility model relates to a vehicle technical field especially relates to a clutch actuating mechanism and vehicle.

Background

The clutch actuating mechanism of the existing mechanical automatic transmission mainly has the forms of electric control, pneumatic control, hydraulic pressure and the like, but because the pneumatic and hydraulic clutch actuating mechanisms have high requirements on valves and machining precision, and have the defects of complex control, poor stability and the like, the clutch actuating mechanism of the traditional mechanical automatic transmission mostly adopts the electric control form, namely a motor drives a lead screw or a worm gear mechanism. According to the working characteristics of the clutch, the clutch needs to be kept in a certain state, and the motor is required to continuously provide locked-rotor torque at the moment, so that the service life of the motor is not facilitated, and the energy consumption is higher. In order to avoid the situation that the motor continuously outputs the torque, the clutch actuator is required to have a self-locking function.

The existing electric control clutch actuating mechanism usually adopts a transmission mode of a worm gear and a worm with a self-locking function and a sliding screw (such as a trapezoidal ball screw), but the efficiency of the two transmission modes is generally lower than 40%, so that the transmission efficiency is lower, the heating temperature rises quickly, the worm gear or the ball screw nut is quickly abraded, the function of the clutch is further lost, and the service life of the whole system is greatly reduced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a clutch actuating mechanism and vehicle have self-locking function, and transmission efficiency is high.

To achieve the purpose, the utility model adopts the following technical proposal:

a clutch actuator comprising:

a cylinder body;

a rotating motor located outside the cylinder block;

the transmission assembly penetrates through the cylinder body and is in sealing sliding fit with the inner wall of the cylinder body, one end of the transmission assembly is connected to the output end of the rotating motor through a ball screw nut pair, the other end of the transmission assembly is connected to the clutch, and the transmission assembly divides the inner cavity of the cylinder body into a first oil cavity and a second oil cavity;

and the hydraulic self-locking assembly is respectively communicated with the first oil cavity and the second oil cavity and can control the on-off of hydraulic oil in the cylinder body.

Preferably, the hydraulic self-locking assembly comprises:

the two ends of the circulating oil way are respectively communicated with the first oil cavity and the second oil cavity;

and the electromagnetic valve is arranged on the circulating oil path and is used for controlling the on-off of the circulating oil path.

Preferably, the electromagnetic valve is a two-position two-way electromagnetic valve.

Preferably, the transmission assembly comprises:

one end of the push rod is connected to the ball screw nut pair, and the other end of the push rod is connected to the clutch;

and the plunger is sleeved on the push rod and is in sealing sliding fit with the inner wall of the cylinder body, and the first oil cavity and the second oil cavity are respectively arranged at two sides of the plunger.

Preferably, the transmission assembly further comprises an elastic piece, the elastic piece is sleeved on the push rod, and two ends of the elastic piece are respectively abutted to the plunger and the inner wall of the cylinder body.

Preferably, the elastic member is a spring, and the spring is always in a compressed state.

Preferably, the hydraulic oil supply device further comprises an oil supply assembly, and the oil supply assembly is used for supplying hydraulic oil to the first oil chamber and the second oil chamber respectively.

Preferably, the oil supply assembly includes:

an oil can;

one end of the first oil supplementing way is communicated with the oil can, and the other end of the first oil supplementing way is communicated with the first oil cavity;

and one end of the second oil supplementing way is communicated with the oil can, and the other end of the second oil supplementing way is communicated with the second oil cavity.

Preferably, the oil supply assembly further includes:

the first check valve is arranged on the first oil supplementing path and used for controlling hydraulic oil to flow from the oil pot to the first oil cavity through the first oil supplementing path;

and the second one-way valve is arranged on the second oil supplementing path and used for controlling hydraulic oil to flow into the second oil cavity from the oil pot through the second oil supplementing path.

In order to achieve the above object, the present invention further provides a vehicle, including a clutch and the clutch actuator.

The utility model has the advantages that:

the utility model provides a clutch actuating mechanism, rotating electrical machines pass through the vice drive transmission assembly of ball screw nut and remove for the cylinder body to accomplish the process that the clutch combines and separates. Compared with other electric control modes adopted in the prior art, the transmission efficiency of the ball screw nut pair can reach more than 90%, the transmission efficiency is high, the required power torque of the rotating motor can be greatly reduced, the heat productivity in the working process is reduced, the cost is reduced, the space is saved, and the stability and the service life of the system are improved. Because ball nut duplicate does not possess self-locking function, there is unmatched problem in ball nut pair and clutch operating characteristic, divide into first oil pocket and second oil pocket through setting up the inner chamber of transmission assembly with the cylinder body, hydraulic pressure self-locking assembly communicates respectively in first oil pocket and second oil pocket and can control the break-make of hydraulic oil in the cylinder body, when the clutch need stop at a certain position, the disconnection of hydraulic oil in the hydraulic pressure self-locking assembly control cylinder body, lead to transmission assembly can't remove for the cylinder body, thereby realize the auto-lock.

This clutch actuating mechanism under the mating reaction of rotating electrical machines, cylinder body and hydraulic pressure auto-lock subassembly to combine together automatically controlled and liquid accuse, be used for solving the problem that current automatically controlled clutch actuating mechanism transmission mode is inefficient, through setting up the hydraulic pressure auto-lock subassembly, make clutch actuating mechanism have self-locking function, supplementary ball screw nut pair high-efficient transmission of guaranteeing.

The utility model also provides a vehicle, including clutch and foretell clutch actuating mechanism. By arranging the clutch actuating mechanism, the loss of electric quantity can be further reduced, and the service life of the whole system is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of the clutch actuator of the present invention.

In the figure:

1. a cylinder body; 2. a rotating electric machine; 3. a transmission assembly; 4. a ball screw nut pair; 5. a hydraulic self-locking assembly; 6. an oil supplementing assembly; 7. a clutch;

11. a first oil chamber; 12. a second oil chamber;

31. a push rod; 32. a plunger; 33. an elastic member;

41. a ball screw; 42. a lead screw nut;

51. a circulating oil path; 52. an electromagnetic valve;

61. an oil can; 62. a first oil supply path; 63. a second oil supply path; 64. a first check valve; 65. a second one-way valve;

71. separating the rocker arm; 72. and separating the bearing.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The present embodiment provides a clutch actuator for controlling the action of the clutch 7. As shown in fig. 1, the clutch actuator comprises a cylinder body 1, a rotating motor 2, a transmission assembly 3 and a hydraulic self-locking assembly 5, wherein the cylinder body 1 plays a role of integral support, and an inner cavity of the cylinder body 1 is used for containing hydraulic oil. The outer side of the cylinder body 1 is provided with a rotating motor 2, the rotating motor 2 is preferably a servo motor, a transmission assembly 3 plays a role in middle transmission connection, the transmission assembly 3 penetrates through the cylinder body 1 and is in sealing sliding fit with the inner wall of the cylinder body 1, one end of the transmission assembly 3 is connected to the output end of the rotating motor 2 through a ball screw nut pair 4, and the other end of the transmission assembly is connected to a clutch 7. The transmission assembly 3 divides the inner cavity of the cylinder block 1 into a first oil chamber 11 and a second oil chamber 12. The hydraulic self-locking assembly 5 is respectively communicated with the first oil chamber 11 and the second oil chamber 12 and can control the on-off of hydraulic oil in the cylinder body 1. Wherein the clutch 7 comprises a release rocker arm 71 and a release bearing 72, and the transmission assembly 3 pushes the release bearing 72 to move through the release rocker arm 71 so as to realize the connection and the disconnection of the clutch 7.

In the clutch actuator provided by the embodiment, the rotating motor 2 drives the transmission assembly 3 to move relative to the cylinder 1 through the ball screw nut pair 4, so as to complete the process of engaging and disengaging the clutch 7. Compared with other electric control modes adopted in the prior art, the transmission efficiency of the ball screw nut pair 4 can reach more than 90%, the transmission efficiency is high, the required power torque of the rotating motor 2 can be greatly reduced, the heat productivity in the working process is reduced, the cost is reduced, the space is saved, the system stability is improved, and the service life is prolonged.

Because ball nut pair 4 does not own possess self-locking function, ball nut pair 4 and clutch 7 operating characteristic have unmatched problem, divide into first oil pocket 11 and second oil pocket 12 with the inner chamber of cylinder body 1 through setting up transmission assembly 3, hydraulic pressure auto-lock subassembly 5 communicates respectively in first oil pocket 11 and second oil pocket 12 and can control the break-make of the interior hydraulic oil of cylinder body 1, when clutch 7 need stop at a certain position, the disconnection of hydraulic pressure in hydraulic pressure auto-lock subassembly 5 control cylinder body 1, lead to transmission assembly 3 can't remove for cylinder body 1, thereby realize the auto-lock.

This clutch actuating mechanism under the mating reaction of rotating electrical machines 2, cylinder body 1 and hydraulic pressure auto-lock subassembly 5 to combine together automatically controlled and liquid accuse, be used for solving the problem that current automatically controlled clutch actuating mechanism transmission mode is inefficient, through setting up hydraulic pressure auto-lock subassembly 5, make clutch actuating mechanism have self-locking function, supplementary 4 high-efficient transmissions of ball screw nut pair of guaranteeing.

Further, the clutch actuator includes a ball screw 41 and a screw nut 42, the ball screw 41 is connected to the output end of the rotating electrical machine 2, and the screw nut 42 is fitted over the ball screw 41 to form a ball screw nut pair 4. The rotary motor 2 drives the ball screw 41 to rotate, and the screw nut 42 moves along the axial direction of the ball screw 41 while the screw nut 42 rotates along with the ball screw 41, so that the transmission assembly 3 is driven to move relative to the cylinder 1.

Further, the transmission assembly 3 includes a push rod 31 and a plunger 32, the push rod 31 is a long rod-shaped structure, the push rod 31 penetrates through the cylinder 1 along the axial direction, one end of the push rod 31 is connected to the screw nut 42 of the ball screw nut pair 4, and the other end is connected to the clutch 7. The plunger 32 can also be called as a piston, the plunger 32 is sleeved on the push rod 31 and is in sealing sliding fit with the inner wall of the cylinder body 1, the plunger 32 divides the inner cavity of the cylinder body 1 to form a first oil cavity 11 and a second oil cavity 12, namely, the first oil cavity 11 and the second oil cavity 12 are respectively located on two sides of the plunger 32.

When the rotating motor 2 rotates, the rotating motor 2 drives the push rod 31 to move through the ball screw nut pair 4, the plunger 32 slides in a sealing mode relative to the cylinder body 1, the hydraulic self-locking assembly 5 is communicated with the first oil cavity 11 and the second oil cavity 12 respectively, and along with the movement of the plunger 32, hydraulic oil in the first oil cavity 11, the hydraulic self-locking assembly 5 and hydraulic oil in the second oil cavity 12 are communicated with each other to achieve combination and separation of the clutch 7, so that normal work of the clutch 7 is guaranteed.

Further, the transmission assembly 3 further includes an elastic member 33, the elastic member 33 is sleeved on the push rod 31, and two ends of the elastic member 33 are respectively abutted against the inner walls of the plunger 32 and the cylinder 1. When the friction plates of the clutch 7 are worn, the thrust of the elastic member 33 can compensate for the displacement change caused by the wear, and the elastic member 33 performs the position adjustment. Preferably, the elastic member 33 is a spring, which is always in a compressed state, and the spring can continuously apply pressure to the push rod 31 through the plunger 32, so as to pre-tighten the release bearing 72 in the clutch 7.

Further, the hydraulic self-locking assembly 5 includes a circulating oil path 51 and an electromagnetic valve 52, two ends of the circulating oil path 51 are respectively communicated with the first oil chamber 11 and the second oil chamber 12, the electromagnetic valve 52 is disposed on the circulating oil path 51, and the electromagnetic valve 52 is used for controlling on/off of the circulating oil path 51. If the electromagnetic valve 52 controls the circulation oil path 51 to be opened, the first oil chamber 11, the second oil chamber 12 and the circulation oil path 51 are communicated with each other, and the hydraulic oil can circulate without affecting the normal movement of the clutch 7 during the movement of the plunger 32 relative to the cylinder block 1. When the clutch 7 needs to stop at a certain position, the electromagnetic valve 52 controls the circulating oil path 51 to be opened, the circulating oil path 51 to be closed, hydraulic oil cannot circulate among the first oil chamber 11, the second oil chamber 12 and the circulating oil path 51, and the push rod 31 cannot be displaced under the hydraulic action, so that self-locking is realized.

Specifically, the electromagnetic valve 52 is a two-position two-way electromagnetic valve, the two-position two-way electromagnetic valve is in a normally open position, the lower position of the two-position two-way electromagnetic valve is a working position, and the circulating oil path 51 is communicated at the moment; the two-position two-way solenoid valve is in a normally closed position, the upper position of the two-position two-way solenoid valve is a working position, and the circulating oil path 51 is closed at the moment.

Since the hydraulic oil is easy to decrease due to volatilization, leakage and the like along with the prolonging of the service time, in order to solve the problem, the clutch actuating mechanism further comprises an oil supplementing assembly 6, and the oil supplementing assembly 6 is used for supplementing the hydraulic oil to the first oil cavity 11 and the second oil cavity 12 respectively. By arranging the oil supplementing assembly 6, the hydraulic oil of the cylinder body 1 is supplemented and supplied, and the influence on the combination, the separation and the position locking of the clutch 7 due to the reduction of the hydraulic oil is avoided.

Specifically, the oil compensating assembly 6 includes an oil can 61, a first oil compensating passage 62 and a second oil compensating passage 63, one end of the first oil compensating passage 62 is communicated with the oil can 61, and the other end is communicated with the first oil chamber 11. The first oil supply passage 62 is provided for supplying the first oil chamber 11 with hydraulic oil. One end of the second oil supply path 63 is communicated with the oil can 61, and the other end is communicated with the second oil chamber 12. The second oil supply passage 63 is provided for supplying the second oil chamber 12 with hydraulic oil.

Further, the oil compensating assembly 6 further includes a first check valve 64 and a second check valve 65, and the first check valve 64 is disposed on the first oil compensating passage 62 and is used for controlling the hydraulic oil to flow from the oil can 61 to the first oil chamber 11 through the first oil compensating passage 62. The second check valve 65 is provided on the second oil supply passage 63, and controls the flow of the hydraulic oil from the oil can 61 into the second oil chamber 12 through the second oil supply passage 63. In the process that the push rod 31 moves relative to the cylinder body 1, the first check valve 64 and the second check valve 65 are opened, hydraulic oil in the oil can 61 flows to the first oil cavity 11 through the first oil supplementing channel 62, hydraulic oil in the oil can 61 flows to the second oil cavity 12 through the second oil supplementing channel 63, so that the hydraulic oil in the oil can 61 can be supplemented to the circulating oil channel 51 in time, and the possibility that the circulating oil flows back to the oil can 61 is blocked due to the first check valve 64 and the second check valve 65, so that the reliability of hydraulic oil supplementation is ensured.

The working process of the clutch actuating mechanism provided by the embodiment is as follows:

when the rotating motor 2 rotates, the rotating motor 2 drives the push rod 31 to move towards or away from the clutch 7 through the ball screw nut pair 4, the plunger 32 slides in a sealing manner relative to the cylinder body 1, the electromagnetic valve 52 is in a normally open position at the moment, the circulating oil path 51 is respectively communicated with the first oil chamber 11 and the second oil chamber 12, along with the movement of the plunger 32, hydraulic oil in the second oil chamber 12 enters the first oil chamber 11 through the circulating oil path 51, and the hydraulic oil can circulate to complete the combining and separating processes of the clutch 7;

when the clutch 7 needs to stop at a certain position, the two-position two-way electromagnetic valve is in a normally closed position, the electromagnetic valve 52 controls the circulating oil path 51 to be opened, the circulating oil path 51 is controlled to be closed, hydraulic oil cannot circulate among the first oil chamber 11, the second oil chamber 12 and the circulating oil path 51, and the push rod 31 cannot be displaced under the hydraulic action, so that self-locking is realized.

The embodiment also provides a vehicle comprising the clutch 7 and the clutch actuator. By arranging the clutch actuating mechanism, the loss of electric quantity can be further reduced, and the service life of the whole system is prolonged.

In the description herein, it is to be understood that the terms "upper", "lower", "right", and the like are used in an orientation or positional relationship based on that shown in the drawings for convenience of description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.

In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A clutch actuator, comprising:

a cylinder body (1);

a rotating electric machine (2) located outside the cylinder block (1);

the transmission assembly (3) penetrates through the cylinder body (1) and is in sealing sliding fit with the inner wall of the cylinder body (1), one end of the transmission assembly (3) is connected to the output end of the rotating motor (2) through a ball screw nut pair (4), the other end of the transmission assembly is connected to the clutch (7), and the transmission assembly (3) divides the inner cavity of the cylinder body (1) into a first oil cavity (11) and a second oil cavity (12);

the hydraulic self-locking assembly (5), the hydraulic self-locking assembly (5) is respectively communicated with the first oil cavity (11) and the second oil cavity (12) and can control the on-off of hydraulic oil in the cylinder body (1).

2. Clutch actuator according to claim 1, wherein the hydraulic self-locking assembly (5) comprises:

a circulating oil passage (51), both ends of the circulating oil passage (51) being communicated with the first oil chamber (11) and the second oil chamber (12), respectively;

and an electromagnetic valve (52) provided in the circulation oil path (51), wherein the electromagnetic valve (52) is configured to control the on/off of the circulation oil path (51).

3. A clutch actuator according to claim 2, characterized in that the solenoid valve (52) is a two-position, two-way solenoid valve.

4. A clutch actuator according to claim 3, characterized in that the transmission assembly (3) comprises:

a push rod (31) having one end connected to the ball screw nut pair (4) and the other end connected to the clutch (7);

and the plunger (32) is sleeved on the push rod (31) and is in sealing sliding fit with the inner wall of the cylinder body (1), and the first oil chamber (11) and the second oil chamber (12) are respectively arranged at two sides of the plunger (32).

5. The clutch actuator according to claim 4, wherein the transmission assembly (3) further comprises an elastic member (33), the elastic member (33) is sleeved on the push rod (31), and two ends of the elastic member (33) are respectively abutted against the plunger (32) and the inner wall of the cylinder (1).

6. Clutch actuator according to claim 5, wherein the resilient member (33) is a spring, which is always in compression.

7. Clutch actuator according to any of claims 1-6, further comprising an oil replenishment assembly (6), said oil replenishment assembly (6) being adapted to replenish said first and second oil chambers (11, 12) with hydraulic oil, respectively.

8. Clutch actuator according to claim 7, wherein the oil supply assembly (6) comprises:

an oil can (61);

a first oil supply path (62), one end of which is communicated with the oil pot (61), and the other end of which is communicated with the first oil chamber (11);

and one end of the second oil supplementing way (63) is communicated with the oil can (61), and the other end of the second oil supplementing way is communicated with the second oil cavity (12).

9. Clutch actuator according to claim 8, wherein the oil replenishment assembly (6) further comprises:

a first check valve (64) provided on the first oil supply passage (62) for controlling the flow of hydraulic oil from the oil pot (61) into the first oil chamber (11) through the first oil supply passage (62);

and the second check valve (65) is arranged on the second oil supplementing way (63) and is used for controlling the hydraulic oil to flow from the oil pot (61) to the second oil cavity (12) through the second oil supplementing way (63).

10. A vehicle, characterized by comprising a clutch (7) and a clutch actuator according to any one of claims 1-9.