Middle motor clutch with double-bearing structure

Abstract

The utility model discloses a middle motor clutch with a double-bearing structure, and belongs to the technical field of motors. The centrally-mounted motor clutch of the double-bearing structure comprises a speed reducer driving shaft; the clutch cavity disc is of an eccentric structure; the speed reducer is in transmission connection with a speed reducer driving shaft through helical teeth; the clutch core is provided with a boss arranged in the circumferential direction of the outer wall. In the axial direction, the two sides of the boss are sleeved with a front bearing and a rear bearing respectively; a plurality of roller pins are arranged between the front bearing and the rear bearing and are in sliding fit with the top surface of the boss; an elastic part is arranged in a gap between each roller pin and the clutch cavity disc; and the elastic parts are propped against the roller pins. The utility model can effectively increase the space utilization rate, reduce the noise and prolong the service life of the device.

Description

Technical Field

[0001] The utility model relates to a technology in the field of motors, specifically a center-mounted motor clutch with a double-bearing structure. Background Art

[0002] In traditional center-mounted motors, the motor reducer and the clutch are two independently operating components, each occupying a relatively large space, resulting in low space utilization rate of the center-mounted motor and being unfavorable for the miniaturization of the center-mounted motor. To solve the above problems existing in the prior art, the present utility model comes into being. Summary of the Utility Model

[0003] Aiming at the above deficiencies existing in the prior art, the present utility model provides a center-mounted motor clutch with a double-bearing structure, which can effectively increase the space utilization rate of the center-mounted motor and is conducive to the miniaturization of the center-mounted motor.

[0004] The present utility model relates to a center-mounted motor clutch with a double-bearing structure, including:

[0005] A reducer drive shaft;

[0006] A clutch cavity disc, with an eccentric structure; being connected to the reducer drive shaft through helical teeth transmission.

[0007] And a clutch core, provided with bosses arranged circumferentially along the outer wall; axially, a front bearing and a rear bearing are respectively sleeved on both sides of the bosses; a plurality of needle rollers are arranged between the front bearing and the rear bearing, and the needle rollers are in sliding fit with the top surface of the bosses; elastic parts are arranged in the gaps between each needle roller and the clutch cavity disc, and the elastic parts abut against the needle rollers.

[0008] The clutch cavity disc has an eccentric structure in the circumferential direction, and the center of the internal cavity is not its centroid. During the process of the reducer drive shaft driving the clutch cavity disc to rotate in a certain rotation direction through helical teeth, the inner wall of the clutch cavity disc close to the centroid presses the elastic parts to drive the needle rollers to rotate, and the clutch core rotates synchronously under the action of the sliding friction force of the rotating needle rollers to achieve clutch; when the output shaft of the reducer rotates in the reverse direction, due to the design of the eccentric structure, the clutch cavity disc cannot press the elastic parts, and thus the needle rollers are pressed to drive the clutch core to rotate. Therefore, the one-way clutch of the center-mounted motor can be realized.

[0009] For some specific implementation schemes, the elastic parts adopt springs.

[0010] For some specific embodiments, a pair of end covers are further provided. One side of the front bearing abuts against the inner wall of the end cover, and the other side abuts against one side wall surface of the boss. One side of the rear bearing abuts against the inner wall of the other end cover, and the other side abuts against the other side wall surface of the boss. By adding a pair of end covers, a closed space is formed, thereby protecting the bearing structure, the needle rollers and the elastic parts, and preventing sundries from appearing in the mid-mounted motor and affecting the service lives of the bearing structure, the needle rollers and the elastic parts.

[0011] For some specific embodiments, the end covers are respectively fixedly screwed to the clutch cavity plate by screws.

[0012] For some specific embodiments, the bosses are arranged continuously or discontinuously in the circumferential direction of the outer wall of the clutch core.

[0013] Preferably, for the continuous arrangement, it means that the bosses form a complete closed ring structure in the circumferential direction of the outer wall of the clutch core.

[0014] Preferably, for the discontinuously arranged bosses, the number is not less than two segments, and further preferably, they are symmetrically arranged.

[0015] Compared with the prior art, the utility model has the following technical effects:

[0016] 1) By adding helical teeth on the clutch cavity plate, directly connecting the clutch cavity plate and the reducer drive shaft, the space utilization rate is improved, and the space of the mid-mounted motor is saved;

[0017] 2) The clutch cavity plate adopts an eccentric structure, and by arranging elastic parts and needle rollers to cooperate with it, the one-way clutch function between the reducer drive shaft and the clutch is realized;

[0018] 3) By arranging front and rear bearings, after the reducer drive shaft and the clutch cavity plate are engaged and transmitted, the axial force of the reducer drive shaft acting on the clutch cavity plate is resisted, and the problems of noise caused by the shaking of the clutch cavity plate due to the axial force and the reduction of the service life of the clutch are avoided, ensuring the stable operation of the clutch; and the added front and rear bearings reduce the gap between the clutch cavity plate and the clutch core, also ensuring the stable operation of the clutch. Description of the Drawings

[0019] Figure 1 It is a schematic structural diagram of Embodiment 1;

[0020] Figure 2 It is a schematic structural diagram of the clutch core in Embodiment 1;

[0021] In the figure: 100, clutch cavity disc; 200, clutch core; 201, boss; 300, spring; 400, needle roller; 501, front bearing; 502, rear bearing; 601, front end cover; 602, rear end cover; 700, reducer drive shaft. Specific embodiments

[0022] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Embodiment 1

[0024] As Figure 1 and Figure 2 shown, this embodiment includes a clutch cavity disc 100, a clutch core 200, a front end cover 601, a rear end cover 602 and a reducer drive shaft 700.

[0025] The clutch core 200 is provided with a closed circular boss 201 arranged circumferentially along the outer wall. A front bearing 501 is sleeved on one side of the boss 201 of the clutch core 200, and a rear bearing 502 is sleeved on the other side of the boss 201.

[0026] The front bearing 501 and the rear bearing 502 respectively abut against the two side wall surfaces of the boss 201. A number of needle rollers 400 arranged circumferentially are provided between the front and rear bearings. A number of springs 300 are provided in the gap between the needle rollers 400 and the inner wall of the clutch cavity disc 100; the needle rollers 400 are in sliding fit with the top surface of the boss 201 and abut against the springs 300.

[0027] The clutch cavity disc 100 is fixedly connected to the front end cover 601 and the rear end cover 602 by screws. The front end cover 601 abuts against the front bearing 501, and the rear end cover 602 abuts against the rear bearing 502 to form a closed space to protect the structures and parts in this space.

[0028] The clutch cavity disc 100 is connected to the reducer drive shaft 700 by helical gear meshing.

[0029] When this embodiment is working, the reducer drive shaft 700 rotates forward to drive the clutch cavity disc 100 to rotate. The inner wall of the clutch cavity disc 100 close to the centroid compresses the spring 300 and then compresses the needle rollers 400 to rotate. The clutch core 200 rotates synchronously under the action of the sliding friction force of the rotation of the needle rollers 400 to achieve clutch; by setting the bearings, the gap between the clutch cavity disc 100 and the clutch core 200 is reduced, and the stability of the clutch process is improved, and the noise is reduced. The eccentric structure design of the clutch cavity disc 100 also ensures that when the reducer drive shaft 700 rotates in the reverse direction, when the reverse rotation gap of the clutch cavity disc 100 increases, the spring cannot be compressed, and thus the synchronous rotation of the clutch core 200 cannot be achieved, ensuring that the device has a one-way clutch function.

[0030] It should be emphasized that the above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A mid-mounted motor clutch with a dual-bearing structure, characterized in that: include: Reducer drive shaft; Clutch cavity disc, eccentric structure; It is connected with the drive shaft of the reducer through helical gear transmission; The clutch core is provided with bosses arranged along the circumference of the outer wall; in the axial direction, a front bearing and a rear bearing are respectively sleeved on both sides of the boss; a plurality of needle rollers are arranged between the front bearing and the rear bearing, and the needle rollers are slidably matched with the top surface of the boss; an elastic part is arranged in the gap between each needle roller and the clutch cavity disk, and the elastic part is against the needle roller.

2. The mid-mounted motor clutch with dual bearing structure according to claim 1, characterized in that: The elastic part is a spring.

3. The mid-mounted motor clutch with dual bearing structure according to claim 1, characterized in that: A pair of end covers are also provided; one side of the front bearing abuts against the inner wall of the end cover, and the other side abuts against the wall of one side of the boss; one side of the rear bearing abuts against the inner wall of the other end cover, and the other side abuts against the wall of the other side of the boss.

4. The mid-mounted motor clutch with dual bearing structure according to claim 3 is characterized in that: The end covers are respectively fixed to the clutch cavity discs by screw connection.

5. The mid-mounted motor clutch with dual bearing structure according to claim 1, characterized in that: The bosses are arranged continuously or discontinuously in the circumferential direction of the outer wall of the clutch core.

6. The mid-mounted motor clutch with dual bearing structure according to claim 5, characterized in that: The boss is in a complete closed ring structure in the circumferential direction of the outer wall of the clutch core, forming a continuous arrangement.

7. The mid-mounted motor clutch with dual bearing structure according to claim 5, characterized in that: For discontinuously arranged bosses, the number shall not be less than two.

8. The mid-mounted motor clutch with dual bearing structure according to claim 7, characterized in that: The bosses are arranged symmetrically.

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