CN113090681B

CN113090681B - Clutch actuating mechanism and vehicle

Info

Publication number: CN113090681B
Application number: CN202110379163.5A
Authority: CN
Inventors: 杨永刚; 徐占; 屠有余; 柯志宏; 白秀超
Original assignee: FAW Group Corp
Current assignee: FAW Group Corp
Priority date: 2021-04-08
Filing date: 2021-04-08
Publication date: 2022-12-30
Anticipated expiration: 2041-04-08
Also published as: WO2022214049A1; CN113090681A

Abstract

The invention discloses a clutch actuating mechanism and a vehicle, and belongs to the technical field of vehicles. The clutch actuating mechanism comprises a rotary transmission mechanism, a translational transmission mechanism and a driving mechanism, wherein the rotary transmission mechanism comprises a turbine and a worm meshed with the turbine, and the worm is configured to drive the turbine to rotate; the translation transmission mechanism comprises a nut and a screw shaft in threaded connection with an inner hole of the nut, and the screw shaft is fixedly connected with the turbine so that the turbine can drive the screw shaft to rotate relative to the nut and further can be driven by the screw shaft to translate along the axial direction of the screw shaft; the drive mechanism is configured to drive the worm to rotate. The rotary motion of the driving mechanism is converted into the translational motion of the screw shaft, and the screw shaft is used for further driving the turbine to translate so as to generate axial thrust, wherein the translational transmission mechanism adopts a screw rod structure, and has the advantages of high execution efficiency and high execution reliability. The vehicle of the invention improves the driving performance of the vehicle by applying the clutch actuating mechanism.

Description

Clutch actuating mechanism and vehicle

Technical Field

The invention relates to the technical field of vehicles, in particular to a clutch actuating mechanism and a vehicle.

Background

The transfer case is used as a core assembly for realizing the four-wheel drive function of the automobile and mainly takes charge of torque distribution and adjustment, and the electronic control wet clutch is a key part for realizing the torque distribution and adjustment of a main flow adopted by the existing transfer case. The electric control wet clutch consists of a wet clutch and a clutch executing mechanism, and the clutch executing mechanism is controlled to generate certain axial thrust by applying a control command to the clutch executing mechanism, and the axial thrust is applied to the wet clutch, so that the torque distribution and regulation functions required by the transfer case are realized.

However, most of the clutch actuators on the market currently adopt a ball cam mechanism or a hydraulic mechanism to drive a clutch to perform axial translation. The ball cam mechanism is complex in structure, the hydraulic mechanism is low in execution efficiency and poor in execution reliability, and market requirements cannot be met.

Disclosure of Invention

One object of the present invention is to provide a clutch actuator having a compact structure, a light weight, and high performance efficiency and reliability.

Another object of the present invention is to provide a vehicle in which drivability of the vehicle is improved by applying the above clutch actuator.

In order to realize the purpose, the following technical scheme is provided:

in one aspect, a clutch actuator is provided, comprising:

the rotary transmission mechanism comprises a worm wheel and a worm meshed with the worm wheel, and the worm is configured to drive the worm wheel to rotate;

the translation transmission mechanism comprises a nut and a screw shaft in threaded connection with an inner hole of the nut, and the screw shaft is fixedly connected with the turbine so that the turbine can drive the screw shaft to rotate relative to the nut and further can be driven by the screw shaft to translate along the axial direction of the screw shaft;

a drive mechanism configured to drive the worm to rotate.

As a preferable scheme of the clutch actuating mechanism, gear teeth matched with the worm are arranged on part or all of the circumference of the worm wheel.

Preferably, the screw shaft has a center hole at its center.

As a preferable scheme of the clutch executing mechanism, an inner spiral groove is arranged in an inner hole of the nut, an outer spiral groove matched with the inner spiral groove is arranged on the screw shaft, and a plurality of balls are sequentially arranged between the inner spiral groove and the outer spiral groove.

Preferably, the clutch actuator further includes a thrust bearing disposed on a side of the turbine away from the screw shaft.

Preferably, the screw shaft is provided at one end thereof with a connecting flange fixedly connected to one side of the turbine.

Preferably, the driving mechanism includes an actuating motor, and a rotor shaft of the actuating motor is in transmission connection with the worm.

As the preferable scheme of the clutch executing mechanism, the clutch executing mechanism further comprises a shell, wherein supporting bearings are arranged at two ends of the worm, and are fixed on the shell.

Preferably, the nut is fixedly connected with the housing as the clutch actuator.

In another aspect, a vehicle is provided that includes a clutch actuator as described above.

Compared with the prior art, the invention has the beneficial effects that:

the clutch actuating mechanism comprises a rotary transmission mechanism, a translational transmission mechanism and a driving mechanism, wherein the rotary transmission mechanism comprises a worm wheel and a worm meshed with the worm wheel, and the worm is configured to drive the worm wheel to rotate; the translation transmission mechanism comprises a nut and a screw shaft screwed in an inner hole of the nut, and the screw shaft is fixedly connected with the turbine so that the turbine can drive the screw shaft to rotate relative to the nut and further can be driven by the screw shaft to translate along the axial direction of the screw shaft; the drive mechanism is configured to drive the worm to rotate. The rotary motion of the driving mechanism is converted into the translational motion of the screw shaft by the rotary transmission mechanism and the translational transmission mechanism, and the screw shaft is further used for driving the turbine to translate so as to generate axial thrust, wherein the translational transmission mechanism adopts a screw rod structure, and has the advantages of high execution efficiency and high execution reliability.

The vehicle of the invention improves the driving performance of the vehicle by applying the clutch actuating mechanism.

Drawings

FIG. 1 is a schematic view of a clutch actuator according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of another perspective of a clutch actuator according to an embodiment of the present invention;

FIG. 3 is an exploded view of a clutch actuator in an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a clutch actuator in an embodiment of the present invention;

FIG. 5 is a schematic diagram of a clutch actuator according to an embodiment of the present invention with the clutch engaged;

fig. 6 is a schematic structural diagram of a clutch actuator according to an embodiment of the present invention when the clutch is disengaged.

Reference numerals are as follows:

1. a rotation transmission mechanism; 11. a turbine; 111. gear teeth; 12. a worm; 121. a front bearing; 122. a rear bearing;

2. a translation transmission mechanism; 21. a nut; 211. an inner spiral groove; 22. a screw shaft; 221. an outer spiral groove; 222. a central bore; 223. a connecting flange; 23. a ball bearing;

3. a drive mechanism; 31. an execution motor; 32. an execution controller;

4. a thrust bearing;

5. a housing.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in a specific case to those of ordinary skill in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply 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.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

As shown in fig. 1 to 6, the present embodiment is directed to providing a clutch actuator, including a rotation transmission mechanism 1, a translation transmission mechanism 2 and a driving mechanism 3, where the rotation transmission mechanism 1 includes a worm wheel 11 and a worm 12 engaged with the worm wheel 11, and the worm 12 is configured to drive the worm wheel 11 to rotate; the translation transmission mechanism 2 comprises a nut 21 and a screw shaft 22 screwed in an inner hole of the nut 21, and the screw shaft 22 is fixedly connected with the turbine 11, so that the turbine 11 can drive the screw shaft 22 to rotate relative to the nut 21, and further the turbine 11 can be driven by the screw shaft 22 to translate along the axial direction of the screw shaft 22; the drive mechanism 3 is configured to drive the worm 12 in rotation.

It should be noted that, in the clutch actuator provided in this embodiment, the rotation transmission mechanism 1 and the translation transmission mechanism 2 are used to convert the rotation motion of the driving mechanism 3 into the translation motion of the screw shaft 22, and the screw shaft 22 is used to further drive the turbine 11 to translate so as to generate the axial thrust, where the translation transmission mechanism 2 adopts a screw rod structure, and has the advantages of high execution efficiency and high execution reliability.

Optionally, the partial circumference of the worm wheel 11 is provided with gear teeth 111 matched with the worm 12, so that the self-weight is reduced on the basis of meeting the transmission requirement. In addition to this, the worm wheel 11 may be provided with teeth 111 on its entire circumference, which teeth are adapted to the worm 12.

Optionally, an inner spiral groove 211 is formed in the inner hole of the screw nut 21, an outer spiral groove 221 matching with the inner spiral groove 211 is formed on the screw shaft 22, a plurality of balls 23 are sequentially arranged between the inner spiral groove 211 and the outer spiral groove 221, and the rotation resistance between the screw nut 21 and the screw shaft 22 is reduced by the balls 23.

Optionally, the center of the screw shaft 22 is provided with a central hole 222 for avoiding the input shaft.

Optionally, one end of the screw shaft 22 is provided with a connecting flange 223, the connecting flange 223 is fixedly connected with one side of the turbine 11, and the connecting flange 223 is fixedly connected with the turbine 11 by a plurality of connecting pieces, which is more stable. Alternatively, the connecting members are arranged at equal intervals along the circumferential direction of the connecting flange 223, and the stress is more stable.

Optionally, the clutch actuator further includes a thrust bearing 4, the thrust bearing 4 is disposed on a side of the turbine 11 away from the screw shaft 22, and the thrust bearing 4 is used to transmit the axial displacement of the turbine 11 to the clutch, so as to implement the pressing operation of the clutch. Illustratively, the thrust bearing 4 is limited by an annular step and end flats on the turbine 11.

Optionally, the driving mechanism 3 includes an actuator motor 31, and a rotor shaft of the actuator motor 31 is in transmission connection with the worm 12. Illustratively, the actuator motor 31 is cooperatively connected with a flat key at the end of the rotor shaft of the actuator motor and a flat key at the end of the worm 12. Optionally, the driving mechanism 3 further comprises an actuating controller 32 for receiving and processing the transfer case control signal, and then outputting to the actuating motor 31. Illustratively, the actuator controller 32 is fixed to the actuator motor 31 by a coupling. The execution motor 31 is responsible for rotating the rotor shaft of the execution motor by a certain angle according to the command of the execution controller 32, the worm 12 transmits the rotation angle of the execution motor 31 to the turbine 11, the turbine 11 transmits the rotation angle of the worm 12 to the screw shaft 22, and meanwhile, the turbine 11 can also transmit the axial displacement from the screw shaft 22; the nut 21 is engaged with the screw shaft 22, so that the rotation angle of the screw shaft 22 can be converted into the axial displacement of the screw shaft 22 to drive the turbine 11 to generate the axial displacement, and finally, the thrust bearing 4 transmits the axial displacement of the turbine 11 to the clutch to perform the pressing operation of the clutch.

Optionally, as shown in fig. 4 in conjunction with fig. 1, the clutch actuator further includes a housing 5, and both ends of the worm 12 are provided with support bearings, respectively denoted as a front bearing 121 and a rear bearing 122, and both the front bearing 121 and the rear bearing 122 are fixed on the housing 5. Optionally, the nut 21 is fixedly connected with the housing 5. Illustratively, the nut 21 is fixed by its outer circumference to the inner bore of the housing 5. The housing 5 supports two support bearings, the screw 21 and the actuator motor 31.

For example, as shown in fig. 5 in conjunction with fig. 1 and 2, the operating principle of the clutch when engaged is as follows:

the execution controller 32 receives the transfer gear engagement clutch control signal, controls the rotor shaft of the execution motor 31 to rotate in the positive direction, drives the worm 12 to rotate in the positive direction through the execution motor 31, the worm 12 drives the turbine 11 to rotate in the positive direction, the turbine 11 drives the screw shaft 22 to rotate in the positive direction, the nut 21 is matched with the screw shaft 22 to convert the rotation angle of the screw shaft 22 into the axial displacement of the screw shaft 22 and drive the turbine 11 to generate the axial displacement, so that the turbine 11 moves axially in the direction close to the clutch until the thrust bearing 4 contacts with the clutch and pushes the clutch to be in the engagement state, and the transmission torque of the clutch can be adjusted by adjusting the output torque of the execution motor 31.

Correspondingly, as shown in fig. 6 in conjunction with fig. 1 and 2, the operating principle when the clutch is disconnected is as follows:

the execution controller 32 receives the transfer case clutch opening control signal, controls the rotor shaft of the execution motor 31 to rotate reversely, drives the worm 12 to rotate reversely through the execution motor 31, the worm 12 drives the turbine 11 to rotate reversely, the turbine 11 drives the screw shaft 22 to rotate reversely, the nut 21 is matched with the screw shaft 22 to convert the rotation angle of the screw shaft 22 into the axial displacement of the screw shaft 22 and drive the turbine 11 to generate reverse axial displacement, so that the turbine 11 axially moves in the direction away from the clutch, the thrust bearing 4 is pushed by the clutch return spring to move in the reverse axial direction until the thrust bearing 4 is separated from the clutch, and the clutch becomes an open state.

The embodiment also provides a vehicle comprising the clutch actuating mechanism. By applying the clutch actuating mechanism, the driving performance of the vehicle is improved.

It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. Those skilled in the art will appreciate that the present invention is not limited to the particular embodiments described herein, and that various obvious changes, rearrangements and substitutions will now be 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 by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A clutch actuator, comprising:

the rotary transmission mechanism (1) comprises a turbine (11) and a worm (12) meshed with the turbine (11), wherein the worm (12) is configured to drive the turbine (11) to rotate;

the translation transmission mechanism (2) comprises a nut (21) and a screw shaft (22) screwed in an inner hole of the nut (21), wherein the screw shaft (22) is fixedly connected with the turbine (11) so that the turbine (11) can drive the screw shaft (22) to rotate relative to the nut (21), and the turbine (11) can be driven by the screw shaft (22) to translate along the axial direction of the screw shaft (22);

a drive mechanism (3) configured to drive the worm (12) in rotation;

the worm gear comprises a shell (5), wherein supporting bearings are arranged at two ends of the worm (12) and fixed on the shell (5); the nut (21) is fixedly connected with the shell (5);

the thrust bearing (4) is arranged on one side, far away from the screw shaft (22), of the turbine (11).

2. Clutch actuator according to claim 1, wherein the worm gear (11) is provided with gear teeth (111) matching the worm screw (12) on part or all of its circumference.

3. Clutch actuator according to claim 1, wherein the center of the screw shaft (22) is provided with a central hole (222).

4. The clutch actuator according to claim 1, wherein an inner spiral groove (211) is formed in an inner hole of the nut (21), an outer spiral groove (221) matched with the inner spiral groove (211) is formed in the screw shaft (22), and a plurality of balls (23) are sequentially arranged between the inner spiral groove (211) and the outer spiral groove (221).

5. Clutch actuator according to claim 1, characterized in that one end of the screw shaft (22) is provided with a connecting flange (223), which connecting flange (223) is fixedly connected to the turbine wheel (11) on one side.

6. Clutch actuator according to claim 1, wherein the drive mechanism (3) comprises an actuator motor (31), the rotor shaft of the actuator motor (31) being in driving connection with the worm (12).

7. A vehicle comprising a clutch actuator according to any one of claims 1 to 6.