Eccentric type self-locking nut

Abstract

An improved eccentric type self-locking nut fundamentally solves the problems of looseness and the like under the working conditions of high vibration frequency, high vibration strength, long vibration period and the like in the prior art and comprises a lower body and an upper body, an eccentric boss is arranged on the upper portion of the lower body, and an eccentric hole is formed in the lower portion of the upper body. The eccentric type self-locking nut is technically characterized in that the eccentric boss of the lower body and the eccentric hole of the upper body are connectively fixed in a close fit manner through a thin-walled sleeve with a frustum, the external diameter of the eccentric boss of the lower body is as same as the internal diameter of the thin-walled sleeve with the frustum, the internal diameter of the eccentric hole of the upper body is as same as the external diameter of the thin-walled sleeve with the frustum, axial central lines of the eccentric boss, the eccentric hole and the thin-walled sleeve with the frustum as well as a thread central line of the upper body and a thread central line of the lower body deviate from a same eccentric axis when the eccentric boss, the eccentric hole and the thin-walled sleeve with the frustum are in the initial state, and an axial initial distance is set between the end of the upper body and the end of the lower body. The eccentric type self-locking nut is simple in processing technology, reasonable in bearing after being matched with a connecting bolt, convenient to mount and demount like a common nut and capable of using own looseness moment to achieve a locking function, and has the advantages of capability of remarkably improving nut looseness preventing effect, more benefit to reuse and the like.

Description

technical field [0001] The invention relates to a fastener used for threaded connection of mechanical equipment, in particular to an eccentric self-locking nut which cooperates with a connecting bolt and utilizes the nut's own loosening torque to implement tightening and anti-loosening. It is mainly suitable for important occasions where the vibration frequency is high, the vibration intensity is high, the vibration time is long, the vibration frequency changes greatly, and the nuts need to be strictly prevented from loosening. Background technique [0002] Usually, the fasteners used for the threaded connection of mechanical equipment are bolt assemblies composed of bolts, nuts, spring washers, etc. In general, the bolts rely on the nuts themselves to prevent loosening. Among them, there are mainly the following types of anti-loosening nuts: built-in nylon anti-slowness ring type anti-loosening nuts, built-in anti-slowness steel sheet type anti-loosening nuts, built-in anti...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an improved eccentric self-locking nut, which fundamentally solves the problems existing in the prior art such as nut loosening under high vibration frequency, high vibration intensity, and long vibration period. The processing technology is simple, the force is reasonable after being matched with the connecting bolt, and it is as easy to disassemble and assemble as ordinary nuts, and the loosening torque of the nut itself is used to implement the tightening function, which has the advantages of significantly enhancing the anti-loosening effect of the nut and is more conducive to repeated use.

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