CN218598670U - Torque overload protection device - Google Patents

Torque overload protection device Download PDF

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Publication number
CN218598670U
CN218598670U CN202222600931.8U CN202222600931U CN218598670U CN 218598670 U CN218598670 U CN 218598670U CN 202222600931 U CN202222600931 U CN 202222600931U CN 218598670 U CN218598670 U CN 218598670U
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CN
China
Prior art keywords
shaft
disc body
ball
overload protection
protection device
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Active
Application number
CN202222600931.8U
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Chinese (zh)
Inventor
方川云
高源�
何瑞
何印
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Chongqing Qingping Machinery Co ltd
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Chongqing Qingping Machinery Co ltd
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Priority to CN202222600931.8U priority Critical patent/CN218598670U/en
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction

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  • One-Way And Automatic Clutches, And Combinations Of Different Clutches (AREA)

Abstract

The utility model belongs to the technical field of mechanical transmission, and relates to a torque overload protection device, which comprises a first shaft and a second shaft which are coaxially and oppositely arranged; an overload protection assembly is arranged between the first shaft and the second shaft, and comprises a first disc body and a second disc body which are oppositely arranged, and balls arranged between the first disc body and the second disc body; the first disc body is fixedly connected with the first shaft; the second disc body is connected with a second shaft; a plurality of ball sockets are arranged on the opposite end surfaces of the first disc body and the second disc body; each ball socket is provided with a ball; an annular groove is arranged on the end face of the second disc body opposite to the first disc body; one end of the ball is positioned in the ball socket, and the other end of the ball is positioned in the annular groove; torque is transmitted between the first disc body and the second disc body through the friction force between the balls and the ball sockets and the annular grooves; when the overload protection device is overloaded, static friction among the balls, the ball socket and the annular groove is converted into rolling friction, so that the first disc body and the second disc body rotate relatively, and the overload protection is realized.

Description

Torque overload protection device
Technical Field
The utility model belongs to the technical field of mechanical transmission, a moment of torsion overload protection device is related to.
Background
At present, a yaw and pitch reducer for wind power generation basically has no overload protection structure, and the output end of the yaw and pitch reducer is easy to overload and fail when meeting a large load, so that the normal operation of a fan is seriously influenced. With the discovery of the technology, overload weak points are designed in the partial yaw and pitch reduction gear, and when the load exceeds a certain value, the small diameter of the internal sun gear is broken, so that the yaw or pitch bearing teeth are protected.
SUMMERY OF THE UTILITY MODEL
In view of this, the present invention provides a torque overload protection device to solve the above problems.
In order to achieve the above purpose, the utility model provides a following technical scheme:
a torque overload protection device comprises a first shaft and a second shaft which are coaxially arranged oppositely; an overload protection assembly is arranged between the first shaft and the second shaft and is used for transmission; the overload protection assembly comprises a first disc body, a second disc body and balls, wherein the first disc body and the second disc body are oppositely arranged, and the balls are arranged between the first disc body and the second disc body; the first disc body is fixedly connected with the first shaft; the second disc body is connected with a second shaft;
a plurality of ball sockets are arranged on the end faces of the first tray body opposite to the second tray body; the ball is arranged in each ball socket; an annular groove is formed in the end face, opposite to the first disc body, of the second disc body; one end of the ball is positioned in the ball socket, and the other end of the ball is positioned in the annular groove; torque is transmitted between the first disc body and the second disc body through the friction force between the balls and the ball socket and the annular groove; when the overload protection device is overloaded, the rolling friction is changed among the ball, the ball socket and the annular groove, so that the first disc body and the second disc body rotate relatively, and the overload protection is realized.
Furthermore, the second disc body is sleeved on the second shaft and is in axial sliding fit with the second shaft; a locking nut is arranged on one side, away from the first tray body, of the second tray body; the locking nut is connected with the second shaft through threads; an elastic part is arranged between the locking nut and the second disc body; the locking nut is screwed to adjust the elastic force applied to the second disc body by the elastic piece, so that the pressure borne by the ball is adjusted. The elastic member may be a conventional elastic member such as a spring.
Further, a first inclined plane and a second inclined plane which are oppositely arranged along the circumferential direction of the first disc body, and a third inclined plane and a fourth inclined plane which are oppositely arranged along the radial direction of the first disc body are arranged in the ball socket; the first inclined plane, the second inclined plane, the third inclined plane and the fourth inclined plane are in tangential contact with the ball; the included angle between the first inclined plane and the end surface of the first tray body is alpha 1 The included angle alpha between the second inclined plane and the end face of the first disc body 2 ，α 1 ＞α 2 And the included angle between the third inclined surface and the end surface of the first tray body is equal to the included angle between the fourth inclined surface and the end surface of the first tray body.
Further, the ball has half of its volume located in the annular groove, and the depth of the socket is less than the ball radius.
Furthermore, a positioning washer is arranged between the first tray body and the second tray body, a positioning hole is formed in the positioning washer, and the ball is located in the positioning hole.
Further, one of the first shaft and the second shaft is an input shaft, and the other is an output shaft.
Further, still include the mount pad, first axle and second axle all rotate to be located in the mount pad.
Furthermore, connecting holes are formed in the first shaft and the second shaft and used for being connected with an external device.
The beneficial effects of the utility model reside in that:
1. the utility model discloses a ball formula overload protection subassembly, the ball skids when the overload protection principle is transshipping and becomes rolling friction by static friction, makes the transmission break away from between input shaft and the output shaft, plays moment of torsion overload protection effect. The torque which can be transmitted by the ball is determined by the maximum static friction force between the ball and the annular groove, and the maximum transmission torque is controlled by changing the elastic force of the elastic member.
2. The utility model provides a ball socket adopts asymmetric structure, the critical state of skidding of control ball that can be more accurate, and the inclination on first inclined plane and second inclined plane is different promptly, and the resultant force of the effort on first inclined plane that the ball receives and second inclined plane exists along ball tangential component, and when normal operation, this component is balanced by the stiction that the ball receives, and when transshipping, this component increases, and when surpassing the biggest stiction, the ball produced the roll.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention. The objectives and other advantages of the invention may be realized and attained by the means of the instrumentalities and/or combinations particularly pointed out in the appended claims.
Drawings
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings, wherein:
fig. 1 is an overall schematic view of the middle torque overload protection device of the present invention;
FIG. 2 is an enlarged view taken at point I in FIG. 1;
FIG. 3 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 2;
FIG. 4 is a schematic view of a first disc body;
fig. 5 is a schematic diagram of the force of the ball in the socket.
Reference numerals are as follows: 1-mounting a base; 2-locking the nut; 3-a spring; 4-a second tray; 41-an annular groove; 5-rolling balls; 6-a first tray; 61-a ball and socket; 611-a first inclined plane; 612-a second bevel; 613-third inclined plane; 614-fourth slope; 7-a connection screw; 8-a bearing; 9-a clamp spring; 10-a first axis; 11-sun gear; 12-a clamp spring; 13-a bearing retainer ring; 14-a bearing; 15-a retainer ring; 16-a bearing; 17-a positioning washer; 18-second axis.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the drawings provided in the following embodiments are only for illustrating the basic idea of the present invention, and the features in the following embodiments and examples may be combined with each other without conflict.
Wherein the showings are for the purpose of illustration only and not for the purpose of limiting the invention, the figures are shown in schematic form and not in pictorial form; for a better explanation of the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "front", "back", etc., indicating directions or positional relationships based on the directions or positional relationships shown in the drawings, it is only for convenience of description and simplification of description, but it is not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limiting the present invention, and those skilled in the art can understand the specific meanings of the terms according to specific situations.
Referring to fig. 1 to 5, a torque overload protection device includes a first shaft 10 and a second shaft 18 coaxially and oppositely disposed; an overload protection component is arranged between the first shaft 10 and the second shaft 18, and transmission is carried out through the overload protection component; the overload protection assembly comprises a first disc body 6 and a second disc body 4 which are oppositely arranged, and balls 5 arranged between the first disc body 6 and the second disc body 4; the first disc body 6 is fixedly connected with the first shaft 10 through a connecting screw 7; the second disc 4 is connected with a second shaft 18; a plurality of ball sockets 61 are arranged on the end surface of the first disc body 6 opposite to the second disc body 4; a ball 5 is placed in each ball socket 61; an annular groove 41 is formed in the end face, opposite to the first disc body 6, of the second disc body 4; the ball 5 is positioned in the ball socket 61 at one end and in the annular groove 41 at the other end; torque is transmitted between the first disc body 6 and the second disc body 4 through the friction force between the balls 5 and the ball sockets 61 and the annular grooves 41; when the overload protection device is overloaded, static friction between the balls 5 and the ball socket 61 and the annular groove 41 is converted into rolling friction, so that the first disk body 6 and the second disk body 4 rotate relatively, and the overload protection is realized.
The second disc body 4 is sleeved on the second shaft 18 and is in axial sliding fit with the second shaft 18; a locking nut 2 is arranged on one side of the second tray body 4, which is far away from the first tray body 6; the locking nut 2 is connected with the second shaft 18 through threads; a spring 3 is arranged between the locking nut 2 and the second disc body 4; the locking nut 2 is screwed to adjust the elastic force exerted on the second disc body 4 by the spring 3, so that the pressure born by the ball 5 is adjusted.
In this embodiment, the ball 5 has a half volume located in the annular groove 41 and the socket 61 has a depth less than the radius of the ball 5. The ball socket 61 is provided with a first inclined surface 611 and a second inclined surface 612 which are arranged oppositely along the circumferential direction of the first disk body 6, and a third inclined surface 613 and a fourth inclined surface 614 which are arranged oppositely along the radial direction of the first disk body 6; the first inclined surface 611, the second inclined surface 612, the third inclined surface 613 and the fourth inclined surface 614 are in tangential contact with the ball 5; the first inclined surface 611 forms an included angle alpha with the end surface of the first disc body 6 1 The included angle alpha between the second inclined surface 612 and the end surface of the first disc body 6 2 ，α 1 ＞α 2 The included angle between the third inclined surface 613 and the end surface of the first disk body 6 is equal to the included angle between the fourth inclined surface 614 and the end surface of the first disk body 6.
Wherein, a positioning washer 17 is arranged between the first disc body 6 and the second disc body 4, a positioning hole is arranged on the positioning washer, and the ball 5 is positioned in the positioning hole.
In this embodiment, the first shaft 10 and the second shaft 18 are both provided with a connecting hole for connecting with an external device, wherein the first shaft 10 is provided with a sun gear 11, the first shaft 10 is used as a power input shaft, and the second shaft 18 is used as an output shaft. The first shaft 10 is rotatably installed in the installation seat 1 through a bearing 8 and a bearing 14, and is axially positioned through a clamp spring 9 and a retainer ring 15; the second shaft 18 is rotatably mounted in the inner bore of the first disk body 6 through a bearing 16, and is axially positioned with the circlip 12 through a bearing collar 13.
In the transmission process, the first disc body 6 and the second disc body 4 transmit torque through the static friction force between the balls 5 and each contact surface, when the disc is overloaded, the positive pressure F1 of the balls on the first inclined surface 611 is increased, so that the resultant force direction of the positive pressure F2 on the second inclined surface 612 deviates to the second inclined surface 612 side, the balls have a tendency of moving to the second inclined surface 612 side, when the maximum static friction force cannot overcome the movement tendency, the balls 5 are in a rolling state, and the friction force exerted on the balls 5 is also converted from the static friction force to a rolling friction force. The first sheet head 6 and the second sheet head 4 rotate relatively to realize overload separation protection.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all of them should be covered by the scope of the claims of the present invention.

Claims (8)

1. A torque overload protection device is characterized in that: comprises a first shaft and a second shaft which are coaxially arranged oppositely; an overload protection assembly is arranged between the first shaft and the second shaft and is used for transmission; the overload protection assembly comprises a first disc body and a second disc body which are oppositely arranged, and balls arranged between the first disc body and the second disc body; the first disc body is fixedly connected with the first shaft; the second disc body is connected with a second shaft;
a plurality of ball sockets are arranged on the end faces of the first tray body opposite to the second tray body; the ball is arranged in each ball socket; an annular groove is formed in the end face, opposite to the first disc body, of the second disc body; one end of the ball is positioned in the ball socket, and the other end of the ball is positioned in the annular groove; torque is transmitted between the first disc body and the second disc body through the friction force between the balls and the ball socket and the annular groove; when the overload protection device is used, rolling friction is changed among the balls, the ball socket and the annular groove, so that the first disc body and the second disc body rotate relatively, and the overload protection is realized.
2. The torque overload protection device of claim 1, wherein: the second disc body is sleeved on the second shaft and is in axial sliding fit with the second shaft; a locking nut is arranged on one side, away from the first disc, of the second disc; the locking nut is connected with the second shaft through threads; an elastic part is arranged between the locking nut and the second disc body; the locking nut is screwed to adjust the elastic force applied to the second disc body by the elastic piece, so that the pressure borne by the ball is adjusted.
3. The torque overload protection device of claim 1, wherein: the ball socket is internally provided with a first inclined plane and a second inclined plane which are oppositely arranged along the circumferential direction of the first disk body, and a third inclined plane and a fourth inclined plane which are oppositely arranged along the radial direction of the first disk body; the first inclined plane, the second inclined plane, the third inclined plane and the fourth inclined plane are in tangential contact with the ball;
the included angle between the first inclined plane and the end face of the first tray body is alpha 1 The included angle alpha between the second inclined plane and the end face of the first disc body 2 ，α 1 ＞α 2 And the included angle between the third inclined surface and the end surface of the first tray body is equal to the included angle between the fourth inclined surface and the end surface of the first tray body.
4. The torque overload protection device of claim 1, wherein: the ball has a half volume located in the annular groove and the socket has a depth less than the ball radius.
5. The torque overload protection device of claim 4, wherein: and a positioning washer is further arranged between the first tray body and the second tray body, a positioning hole is formed in the positioning washer, and the ball is located in the positioning hole.
6. The torque overload protection device of claim 1, wherein: one of the first shaft and the second shaft is an input shaft, and the other shaft is an output shaft.
7. The torque overload protection device of claim 1, wherein: the first shaft and the second shaft are both rotatably arranged in the mounting seat.
8. The torque overload protection device of claim 1, wherein: and the first shaft and the second shaft are both provided with connecting holes for connecting with an external device.
CN202222600931.8U 2022-09-29 2022-09-29 Torque overload protection device Active CN218598670U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202222600931.8U CN218598670U (en) 2022-09-29 2022-09-29 Torque overload protection device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222600931.8U CN218598670U (en) 2022-09-29 2022-09-29 Torque overload protection device

Publications (1)

Publication Number Publication Date
CN218598670U true CN218598670U (en) 2023-03-10

Family

ID=85400655

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202222600931.8U Active CN218598670U (en) 2022-09-29 2022-09-29 Torque overload protection device

Country Status (1)

Country Link
CN (1) CN218598670U (en)

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