CN212079977U

CN212079977U - Torque limiting clutch

Info

Publication number: CN212079977U
Application number: CN202020793751.4U
Authority: CN
Inventors: 周森淇
Original assignee: Zhejiang Wanfutong Motor Co ltd
Current assignee: Zhejiang Wanfutong Motor Co ltd
Priority date: 2020-05-13
Filing date: 2020-05-13
Publication date: 2020-12-04
Anticipated expiration: 2030-05-13

Abstract

The utility model relates to a clutch field, aim at provides a limit square clutch with advantages such as simple structure, practicality are strong, wearing and tearing are little. The technical scheme is as follows: a torque-limiting clutch comprises an output shaft of the clutch, wherein a torque-limiting mechanism is arranged on the output shaft; the moment limiting mechanism comprises a ring body coaxially arranged outside the output shaft, a plurality of connecting rods extending along the radial direction of the ring body are arranged on the side wall of the ring body, and one ends of the connecting rods, far away from the ring body, are connected to the outer wall of a bearing sleeved outside the output shaft; a driven disc is arranged on one side, away from the connecting rod, of the ring body, the section of the driven disc is U-shaped, the ring body is inserted into the driven disc, and a connecting shaft is fixedly connected to the middle of one side, away from the ring body, of the driven disc; and a control assembly for enabling the ring body to be connected with or separated from the driven disc is arranged at the end part of the output shaft.

Description

Torque limiting clutch

Technical Field

The utility model relates to a clutch field, concretely relates to limit square clutch.

Background

The clutch is positioned in a flywheel housing between the engine and the gearbox and is a part for cutting off and transmitting power between the engine and the transmission system; because the torque transmitted by the clutch is limited, if the load is overlarge, the clutch can be damaged by the torque exceeding the clutch, so that a torque limiting structure is usually arranged on the clutch to ensure that the torque transmitted by the clutch does not exceed the limit value of the clutch;

in the prior art, as disclosed in chinese utility model patent No. CN201620411721.6, a friction torque-limiting clutch is disclosed, in which a driving pulley drives a shaft sleeve to rotate by friction force transmitted through a friction surface between a friction plate and a pressure plate and a friction surface between the friction plate and the shaft sleeve, and then drives an output shaft to rotate by using a key; when the output shaft is overloaded, the friction surfaces slide to protect the clutch. However, in practical application, the friction loss of the friction surface is large, and the maintenance cost is high.

Disclosure of Invention

An object of the utility model is to provide a limit square clutch has simple structure, advantage that the practicality is strong.

In order to realize the purpose of the utility model, the utility model adopts the technical proposal that: a torque-limiting clutch comprises an output shaft of the clutch, wherein a torque-limiting mechanism is arranged on the output shaft;

the moment limiting mechanism comprises a ring body coaxially arranged outside the output shaft, a plurality of connecting rods extending along the radial direction of the ring body are arranged on the side wall of the ring body, and one ends of the connecting rods, far away from the ring body, are connected to the outer wall of a bearing sleeved outside the output shaft; a driven disc is arranged on one side, away from the connecting rod, of the ring body, the section of the driven disc is U-shaped, the ring body is inserted into the driven disc, and a connecting shaft is fixedly connected to the middle of one side, away from the ring body, of the driven disc;

and a control assembly for enabling the ring body to be connected with or separated from the driven disc is arranged at the end part of the output shaft.

Preferably, the control assembly comprises an installation sleeve fixedly sleeved on the end part of the output shaft, a plurality of pairs of connecting lugs are arranged on the outer wall of the installation sleeve, first springs are connected to the connecting lugs, the first springs are connected to a T-shaped telescopic column, a plurality of through holes are formed in the ring body, a limiting groove is formed in the side wall, opposite to the ring body, of the driven disc, and the head of the telescopic column penetrates through the through holes and is clamped in the limiting groove;

preferably, the inner wall of the through hole is provided with a circle of limiting bulges, the telescopic column is sleeved with a second spring, and two ends of the second spring are respectively abutted between the limiting bulges and the telescopic column.

Preferably, the inner wall of the through hole is provided with threads, an external thread sleeve penetrates through the through hole, the external thread sleeve and the through hole form thread fit, and the telescopic column penetrates through the external thread sleeve; and a nut is fixedly arranged at the end part of the external thread sleeve positioned outside the through hole.

Preferably, the first spring is in a stretching state and the second spring is in a compressing state when the ring body is combined with the driven disc.

Preferably, the included angle formed by each pair of connecting lugs is obtuse.

Preferably, the mounting sleeve is connected with the output shaft through a spline.

The beneficial effects of the utility model are concentrated and are embodied in: the torque limiting mechanism of the clutch has the advantages of small abrasion, simple structure, strong practicability and the like, particularly, the output shaft drives the mounting sleeve to rotate together and also drives the ring body to rotate together, when the load on the connecting shaft is gradually increased, the first spring increases the stretching length due to the increase of the torque of the output shaft, the telescopic column moves towards the direction close to the output shaft due to the pulling force of the first spring, the second spring is gradually compressed, and the head of the telescopic column gradually slides out of the limiting groove; when the load connected to the connecting shaft is small, the head of the telescopic column is clamped in the limiting groove, so that the ring body can drive the driven disc to rotate together to drive the load; when the load exceeds the maximum load of the clutch, the head of the telescopic column is separated from the limiting groove, the ring body and the driven disc can rotate relatively, and the safe operation of the clutch is guaranteed.

Drawings

FIG. 1 is a schematic view of the overall structure of the clutch of the present invention;

FIG. 2 is a side wall view of the torque limiting mechanism of the present invention;

FIG. 3 is a view from A-A of the structure shown in FIG. 2;

fig. 4 is an enlarged view of a portion B of the structure shown in fig. 3.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1-4, a torque limiting clutch includes an output shaft 1 of a clutch 0, and a torque limiting mechanism is disposed on the output shaft 1;

the moment limiting mechanism comprises a ring body 2 coaxially arranged outside an output shaft 1, a plurality of connecting rods 3 extending along the radial direction of the ring body 2 are arranged on the side wall of the ring body 2, preferably three connecting rods 3 are adopted, the number of the adjacent connecting rods is 120 degrees, one end of each connecting rod 3 is connected with the ring body 2 through a bolt, one end of each connecting rod 3, far away from the ring body 2, is connected to the outer wall of a bearing 4 sleeved outside the output shaft 1, and the connecting rods 3 are fixedly connected with the outer wall of the bearing 4 in a welding mode; a driven disc 5 is arranged on one side, away from the connecting rod 3, of the ring body 2, the section of the driven disc 5 is U-shaped, the ring body 2 is inserted into the driven disc 5, a connecting shaft 6 is fixedly connected to the middle of one side, away from the ring body 2, of the driven disc 5, and a load is mounted on the connecting shaft 6, so that the output torque limit of the clutch can be completed by controlling the engagement or the separation between the ring body 2 and the driven disc 5, and the safe operation of the clutch is ensured;

specifically, a control assembly which enables the ring body 2 to be connected with or separated from the driven disc 5 is arranged at the end of the output shaft 1, the control assembly comprises an installation sleeve 7 fixedly sleeved on the end of the output shaft 1, the installation sleeve 7 is connected with the output shaft 1 through splines, a plurality of pairs of connecting lugs 8 are arranged on the outer wall of the installation sleeve 7, two pairs of connecting lugs 8 are preferably adopted in the embodiment, each pair of connecting lugs 8 is provided with two connecting lugs 8, and the included angle between the two connecting lugs 8 in each pair is 90-100 degrees; the connecting lugs 8 are connected with first springs 9, the number of the first springs 9 corresponds to that of the connecting lugs 8 one by one, one ends, far away from the connecting lugs 8, of the first springs 9 are connected to a T-shaped telescopic column 10, the ring body 2 is provided with a plurality of through holes 11, and the side wall, opposite to the ring body 2, of the driven plate 5 is provided with a limiting groove 12; therefore, in the embodiment, the number of the telescopic columns 10 is two, the telescopic columns are symmetrical in the center of a circle, and the telescopic columns 10 are located among the three connecting rods 3; two first springs 9 are arranged on each telescopic column 10 to adapt to the positive and negative rotation of the output shaft 1, the number of the through holes 11 and the limiting grooves 12 is two, and the head of each telescopic column 10 penetrates through the through holes 11 and is clamped in the limiting grooves 12; when the telescopic rod is clamped in the limiting groove 12, the first spring 9 is in a stretching state, and the second spring 13 is in a compressing state; when the load on the connecting shaft 6 is gradually increased, the moment of the output shaft 1 is also increased, at the moment, one first spring 9 is stretched, the other spring is contracted, when the elastic force of the first spring 9 is increased to a certain value, the telescopic column 10 is pulled out from the through hole 11, the second spring 13 is continuously compressed, and the head of the telescopic column 10 gradually slides out of the limiting groove 12; when the load exceeds the maximum load of the clutch, the head of the telescopic column 10 is separated from the limiting groove 12, the ring body 2 and the driven disc 5 can rotate relatively, the abrasion is relatively small, and when the output shaft is started, the first spring 9 has a dynamic buffering effect, the starting impact force is relieved, and the safe operation of the clutch can be ensured.

Further, in another embodiment of the present invention, in order to increase the versatility of the torque limiting mechanism, the maximum torque limiting value can be adjusted, so that the inner wall of the through hole 11 is provided with a thread and the external thread bushing 14 is worn, the external thread bushing 14 and the through hole 11 form a thread fit, the telescopic column 10 is worn in the external thread bushing 14, two ends of the second spring 13 respectively abut against the head of the telescopic column 10 and the external thread bushing 14, which is equivalent to replacing the limiting protrusion in the previous embodiment with the external thread bushing 14, the end of the external thread bushing 14 outside the through hole 11 is fixedly provided with a nut 15, the compression amount of the second spring 13 is changed by adjusting the external thread bushing 14, and the size of the torque limiting mechanism is adjusted, which has a simple structure and strong versatility; when the compression amount of the second spring 13 is adjusted, the spring force generated by the second spring 13 is larger than the spring force generated by the first spring 9 when the clutch is not operated.

It should be noted that, for simplicity of description, the above-mentioned embodiments of the method are described as a series of acts or combinations, but those skilled in the art should understand that the present application is not limited by the order of acts described, as some steps may be performed in other orders or simultaneously according to the present application. Further, those skilled in the art should also appreciate that the embodiments described in the specification are preferred embodiments and that the acts and elements referred to are not necessarily required in this application.

Claims

1. A torque-limiting clutch comprising an output shaft (1) of a clutch (0), characterized in that: the output shaft (1) is provided with a moment limiting mechanism,

the moment limiting mechanism comprises a ring body (2) coaxially arranged outside the output shaft (1), a plurality of connecting rods (3) extending along the radial direction of the ring body (2) are arranged on the side wall of the ring body (2), and one ends, far away from the ring body (2), of the connecting rods (3) are connected to the outer wall of a bearing (4) sleeved outside the output shaft (1); a driven disc (5) is arranged on one side, away from the connecting rod (3), of the ring body (2), the section of the driven disc (5) is U-shaped, the ring body (2) is inserted into the driven disc (5), and a connecting shaft (6) is fixedly connected to the middle of one side, away from the ring body (2), of the driven disc (5);

the end part of the output shaft (1) is provided with a control assembly for enabling the ring body (2) to be connected with or separated from the driven disc (5), the control assembly comprises an installation sleeve (7) fixedly sleeved on the end part of the output shaft (1), the outer wall of the installation sleeve (7) is provided with a plurality of pairs of connecting lugs (8), the connecting lugs (8) are connected with first springs (9), one ends, far away from the connecting lugs (8), of the first springs (9) are connected to a T-shaped telescopic column (10), the ring body (2) is provided with a plurality of through holes (11), the side wall, opposite to the ring body (2), of the driven disc (5) is provided with a limiting groove (12), and the head part of the telescopic column (10) penetrates through the through holes (11) and is clamped in the limiting groove (12);

be equipped with the spacing arch of round on through-hole (11) inner wall, flexible post (10) overcoat is equipped with second spring (13), the both ends of second spring (13) are supported respectively and are leaned on between spacing arch and flexible post (10).

2. A torque limiting clutch as defined in claim 1, wherein: threads are arranged on the inner wall of the through hole (11), an external thread sleeve (14) penetrates through the through hole, the external thread sleeve (14) and the through hole (11) form thread fit, two ends of the second spring (13) respectively abut against the head of the telescopic column (10) and the external thread sleeve (14), and the telescopic column (10) penetrates through the external thread sleeve (14); a nut (15) is fixedly arranged at the end part of the external thread sleeve (14) positioned outside the through hole (11).

3. A torque limiting clutch as defined in claim 1, wherein: the first spring (9) is in a stretching state and the second spring (13) is in a compressing state under the combined state of the ring body (2) and the driven disc (5).

4. A torque limiting clutch as defined in claim 1, wherein: the included angle formed by each pair of connecting lugs (8) is an obtuse angle.

5. A torque limiting clutch as defined in claim 1, wherein: the mounting sleeve (7) is connected with the output shaft (1) through a spline.