Curved surface type variable-tooth lock nut

Abstract

The invention discloses a curved surface type variable-tooth lock nut, and relates to the technical field of lock nuts. The curved surface type variable-tooth lock nut comprises a nut body. An internal thread is formed in the inner wall of the nut body and is used for being connected with an external thread in a matched manner. An anti-looseness inclined face is formed on a threaded inclined facebelow the tooth bottom of the internal thread and is of a quadric surface structure. The curved surface type variable-tooth lock nut is good in anti-looseness performance and wide in application range.

Description

technical field [0001] The invention relates to the technical field of anti-loosening nuts, in particular to a curved-surface variable-tooth type anti-loosening nut. Background technique [0002] At present, there are many types of nuts with anti-loosening performance, among which variable-tooth type anti-loosening nuts are a kind of fasteners with good anti-loosening performance and repeated use, and have been widely used. At present, most of the variable tooth angles of variable tooth type locknuts are straight and flat. During the thread connection, the contact angle between the large diameter top of the external thread and the variable tooth surface of the internal thread will not change. This angle is closely related to the performance of the anti-loosening nut. The smaller the contact angle, the better the anti-loosening performance. However, if the angle is small, it will also bring some unfavorable factors, that is, the tooth-shaped surface that produces the anti-loo...

AI Technical Summary

Problems solved by technology

This angle is closely related to the performance of the anti-loosening nut. The smaller the contact angle, the better the anti-loosening performance. However, if the angle is small, it will also bring some unfavorable factors, that is, the tooth-shaped surface that produces the anti-loosening effect. The working range is also reduced, and the external thread tolerance requirements are higher

At present, the angle of inclination of the widely used variable-tooth locknuts is mostly 30°, such as figure 1 and figure 2 As shown, its basic thread angle is 60°, and the anti-loosening inclined surface of its anti-loosening effect is a plane, with an angle of 30° with the center line. The characteristic is that when the top of the external thread moves on this surface, their angle will not Changes occur, which can basically meet the connection and cooperation of medium-tolerance thread pairs. A certain inclination angle will also have a certain impact on the anti-loosening performance of locknuts made of different materials. The effect of the anti-loosening performance of the fasteners is affected to a certain extent. The angle of the inclined surface is reduced to improve the anti-loosening performance. The tolerance range may lead to the failure of the anti-loosening performance, so there is a contradiction between the anti-loosening performance and the scope of application of the straight-line variable thread locknut

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