CN219605900U - Clutch device with torque protection function - Google Patents

Abstract

The utility model relates to the technical field of cable cabling, in particular to a clutch device with a torque protection function, which comprises an input disc, a mandrel, an output disc and a fixing nut, wherein the input disc and the mandrel are subjected to cutting off and connection power in a clutch mode; and in a state that the transmission torque is larger than the set value, the steel ball slides out of the corresponding concave cavity and jacks up the output disc. The clutch device effectively limits and protects the transmitted torque, has a simple structure, is small in transformation of the existing clutch, and effectively avoids damage of the clutch or input and output equipment.

Description

Clutch device with torque protection function

Technical Field

The utility model relates to the technical field of cable cabling, in particular to a clutch device with a torque protection function.

Background

Clutches are indispensable devices in mechanical transmission, mainly functioning to couple and decouple power. With the wide use of various clutches in practical applications, the defects of the clutch which can only realize a single clutch function at present are more and more obvious, and particularly in important occasions, the clutch cannot protect components. In order to avoid safety accidents caused by overload of torque, a torque overload protection device needs to be arranged in a mechanical transmission system. Most of the existing mechanical clutch modes adopt friction plate clutch structures, and when the clutch is in an instantaneous overload or overload state, working elements can still be damaged to different degrees due to the fact that the safety protection effect is not ideal, so that effective protection cannot be achieved.

Disclosure of Invention

Based on the above problems, an object of the present utility model is to provide a clutch device with a torque protection function, which can smoothly transmit normal torque, interrupt transmission of abnormal torque, and effectively protect equipment at an output end.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the clutch device with the torque protection function comprises an input disc, a mandrel, an output disc and a fixing nut, wherein the input disc and the mandrel are subjected to cutting-off and connection power in a clutch mode, the output disc and the fixing nut are sequentially sleeved on the mandrel, a first spring is clamped between a first side face of the output disc and the fixing nut, a second side face of the output disc abuts against the end part of the mandrel, a plurality of concave cavities uniformly distributed in the circumferential direction are correspondingly arranged on the abutting face of the second side face and the mandrel, steel balls are arranged in each concave cavity, and the steel balls are positioned in the corresponding concave cavities under the state that the transmission torque is not more than a set value; and in a state that the transmission torque is larger than the set value, the steel ball slides out of the corresponding concave cavity and jacks up the output disc.

Particularly, the back of the input disc is abutted against the second spring, the front of the input disc is provided with a groove, the outer end face of the mandrel is provided with a boss matched with the groove, and when the input disc compresses the second spring and the boss is embedded into the groove, the mandrel is linked with the input disc.

In particular, the fixing nut is in threaded fit with the mandrel, so that the tightening degree of the fixing nut on the first spring can be adjusted to adjust the torque set value.

Particularly, the first spring is a belleville spring, a pressing plate is arranged between the belleville spring and the fixing nut, and an adjusting washer is arranged between the belleville spring and the output disc, and the number of the adjusting washers is adjustable so as to adjust the torque set value.

Particularly, a conical cavity is formed in the second side face of the output disc, a cylindrical cavity is formed in the abutting face of the mandrel, and the conical cavity and the cylindrical cavity are combined to form a concave cavity.

In particular, the depth of the conical cavity is 1/3 of the diameter of the steel ball, and the depth of the cylindrical cavity is 2/3 of the diameter of the steel ball.

In summary, compared with the prior art, the clutch device with the torque protection function has the advantages that the transmitted torque is effectively limited and protected, the structure is simple, the improvement on the existing clutch is small, and the damage of the clutch or input and output equipment is effectively avoided.

Drawings

Fig. 1 is a structural exploded view of a clutch device with a torque protection function provided in an embodiment of the present utility model;

fig. 2 is a cross-sectional view of a clutch device with torque protection according to an embodiment of the present utility model.

In the figure:

1. an input tray; 2. a mandrel; 3. an output tray; 4. a fixing nut; 5. a second spring; 6. a groove; 7. a boss; 8. a first spring; 9. a steel ball; 10. a pressing plate; 11. adjusting the gasket; 12. a conical cavity; 13. and a cylindrical cavity.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar parts throughout, or parts having like or similar functions. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, mechanically connected, electrically connected, indirectly connected through an intermediary, or may be in communication with each other between two elements or in an interaction relationship between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present utility model, unless explicitly stated and limited otherwise, a first feature "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact by another feature therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature. The technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

Referring to fig. 1 and 2, the preferred embodiment provides a clutch device with torque protection, which includes an input disc 1, a spindle 2, an output disc 3, and a fixing nut 4.

Wherein, the input disc 1 and the mandrel 2 are disconnected with power in a separation mode and connected with power in a combination mode. Specifically, the back of the input disc 1 is abutted against the second spring 5, a groove 6 is formed in the front of the input disc 1, a boss 7 matched with the groove 6 is arranged on the outer end face of the mandrel 2, and when the input disc 1 compresses the second spring 5 and the boss 7 is embedded into the groove 6, the mandrel 2 is linked with the input disc 1; when there is no axial pressing force between the input disc 1 and the spindle 2 and the boss 7 is disengaged from the groove 6, the spindle 2 is uncoupled from the input disc 1. The above is a basic clutch structure, and is not further limited.

The output disc 3 and the fixing nut 4 are sequentially sleeved on the mandrel 2, a first spring 8 is clamped between the first side face of the output disc 3 and the fixing nut 4, the second side face of the output disc 3 abuts against the end portion of the mandrel 2, a plurality of concave cavities uniformly distributed in the circumferential direction are correspondingly formed in the abutting face of the second side face and the mandrel 2, and steel balls 9 are arranged in each concave cavity.

In a state that the transmission torque is not greater than the set value, the steel ball 9 is positioned in the corresponding concave cavity so as to normally transmit the torque; in the state that the transmission torque is larger than the set value, the steel ball 9 slides out of the corresponding concave cavity and jacks up the output disc 3, so that the whole device can temporarily interrupt the transmission torque, the equipment at the output end is protected, and the phenomenon of locked rotor is prevented.

In particular, the fixing nut 4 is in threaded engagement with the spindle 2, so that the tightening degree of the fixing nut 4 to the first spring 8 can be adjusted to adjust the pressure to the first spring 8 and thus the torque set point. On the basis, the first spring 8 is preferably a belleville spring, a pressing plate 10 is arranged between the belleville spring and the fixed nut 4, an adjusting washer 11 is arranged between the belleville spring and the output disc 3, and the number of the adjusting washers 11 is adjustable so as to finely adjust the torque set value.

The second side of the output disc 3 is provided with a conical cavity 12, the abutting surface of the mandrel 2 is provided with a cylindrical cavity 13, and the conical cavity 12 and the cylindrical cavity 13 are combined to form a concave cavity. Further, the depth of the conical cavity 12 is preferably 1/3 of the diameter of the steel ball 9, and the depth of the cylindrical cavity 13 is preferably 2/3 of the diameter of the steel ball 9, so that stable transmission of the steel ball 9 in a normal state is ensured, and the steel ball 9 slides out to jack up the output disc 3 in an abnormal state is facilitated.

Working principle: when the fixing nut 4 is screwed in, the first spring 8 is correspondingly compressed, and simultaneously axial pressure is generated on the output disc 3, so that the steel balls 9 are limited to slide out of the conical cavity 12 of the output disc 3.

When the torque transmitted by the output disc 3 is smaller, and the radial force generated when the steel ball 9 rotates is smaller than the axial pressure of the first spring 8, the steel ball 9 is always limited in the conical cavity 12 by the axial force of the first spring 8, and the output disc 3 normally transmits the torque to rotate;

when the output disc 3 transmits a larger torque, the radial force of the steel ball 9 is larger than the axial pressure of the first spring 8, at the moment, the axial pressure of the first spring 8 is insufficient to overcome the radial force of the steel ball 9, the steel ball 9 slides out of the conical cavity 12, the output disc 3 is jacked up and the first spring 8 is compressed, and at the moment, the output disc 3 does not perform rotary motion any more.

Therefore, the device can limit and protect the transmitted torque, when the torque of the output disc 3 is smaller, the steel ball 9 can not jack the output disc 3, and the whole device can smoothly transmit the torque; when the moment of the output disc 3 is larger, the steel ball 9 jacks up the output disc 3, the whole device can temporarily interrupt the transmission moment, and equipment at the output end can be protected to prevent the phenomenon of locked rotor.

In addition, the torque for limiting protection can be adjusted, when the torque to be transmitted is changed, only the tightening degree of the fixing nut 4 is required to be adjusted, even the number of the adjusting washers 11 is increased or decreased, and the tiny accurate adjustment of the torque can be realized.

The above embodiments merely illustrate the basic principles and features of the present utility model, and the present utility model is not limited to the above embodiments, but can be variously changed and modified without departing from the spirit and scope of the present utility model, which is within the scope of the present utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. The clutch device with the torque protection function is characterized by comprising an input disc (1), a mandrel (2), an output disc (3) and a fixing nut (4), wherein the input disc (1) and the mandrel (2) are cut off and connected with power in a clutch mode, the output disc (3) and the fixing nut (4) are sequentially sleeved on the mandrel (2), a first spring (8) is clamped between a first side surface of the output disc (3) and the fixing nut (4), a second side surface of the output disc (3) is abutted against the end part of the mandrel (2), a plurality of cavities which are uniformly distributed in a circumferential direction are correspondingly arranged on the abutting surface of the second side surface and the mandrel (2), steel balls (9) are arranged in each cavity,

in a state that the transmission torque is not greater than a set value, the steel ball (9) is positioned in the corresponding concave cavity;

and when the transmission torque is larger than the set value, the steel ball (9) slides out of the corresponding concave cavity and jacks up the output disc (3).

2. The clutch device with a torque protection function according to claim 1, characterized in that: the back of input dish (1) is supported and is leaned on second spring (5), has seted up recess (6) on the front of input dish (1), be provided with on the outer terminal surface of dabber (2) with recess (6) complex boss (7), work as input dish (1) compression second spring (5) just boss (7) embedding when recess (6), dabber (2) with input dish (1) linkage.

3. The clutch device with a torque protection function according to claim 1, characterized in that: the fixing nut (4) is in threaded fit with the mandrel (2), so that the tightening degree of the fixing nut (4) on the first spring (8) can be adjusted to adjust the torque set value.

4. The clutch device with a torque protection function according to claim 1, characterized in that: the first spring (8) is a belleville spring, a pressing plate (10) is arranged between the belleville spring and the fixing nut (4), an adjusting washer (11) is arranged between the belleville spring and the output disc (3), and the number of the adjusting washers (11) is adjustable to adjust a torque set value.

5. The clutch device with a torque protection function according to claim 1, characterized in that: a conical cavity (12) is formed in the second side face of the output disc (3), a cylindrical cavity (13) is formed in the abutting face of the mandrel (2), and the conical cavity (12) and the cylindrical cavity (13) are combined to form the concave cavity.

6. The clutch device with a torque protection function according to claim 5, characterized in that: the depth of the conical cavity (12) is 1/3 of the diameter of the steel ball (9), and the depth of the cylindrical cavity (13) is 2/3 of the diameter of the steel ball (9).