Structure of locknut and locking adjusting method for locknut

Abstract

The invention discloses a structure of a locknut. A main nut (2) comprises a nut head (4), a middle screw joint section (5) and a tail adjusting section (7) from front to back. An external thread I (6) is arranged on the surface of the middle screw joint section (5). The perimeter of the nut head (4) is larger than that of the middle screw joint section (5). The diameter of the middle screw joint section (5) is larger than that of the tail adjusting section (7). The diameter of a front-section internal screw hole (8) of an auxiliary nut (3) is larger than that of a back-section internal screw hole (9) of the auxiliary nut (3). A front internal thread II (10) is arranged on the inner wall of the front-section internal screw hole (8). A back internal thread III (11) is arranged on the inner wall of the back-section internal screw hole (9). The invention further discloses a locking adjusting method between the main nut and the auxiliary nut of the locknut. By the adoption of the structure of the locknut and the locking adjusting method, a fastened workpiece is protected, it is guaranteed that looseness of all the locking links in various bad working environments such as frequent vibration and load fluctuation is avoided, and the real constant looseness-prevention effect is achieved.

Description

technical field [0001] The invention relates to a structure of an anti-loosening nut and an anti-loosening adjustment method thereof. Background technique [0002] Bolts and nuts are often used to fix more than two joints, and fasteners are inseparable in connection assembly. Fasteners bring convenience to the machinery industry, but they have an inevitable weakness, that is, they will loosen by themselves in the environment of severe vibration and variable load, resulting in damage, disintegration of parts or a complete equipment, and even brewing. become a safety accident. In order to solve the loosening problem of fasteners, scientists and engineers from many countries in the world have done a lot of experiments and researches since the birth of threaded fasteners. The lock nut originated from abroad. It is permanently attached to the thread with special engineering plastics, so that the engineering plastics are squeezed during the tightening process of the internal and...

AI Technical Summary

Problems solved by technology

However, the plastic anti-loosening method is affected by the environment and cannot meet the requirements of high temperature and severe cold

[0003] There are many methods of anti-loosening domestic threads, among which methods to increase friction include spring washers, double nuts, lock washers, buckle nuts, nylon inserts, chemical glue, etc., but in heavy loads, Unstable reliability under severe vibration and harsh environmental conditions; mechanical anti-loosening methods include slotted nuts, cotter pins, stop washers, steel wire series connection, concave cone locking, etc., but some are limited by the structure and cannot be reused; Loosening methods include eccentric nut anti-loosening, conical pressure-holding anti-loosening, Tang's anti-loosening, and spring-type anti-loosening. Due to the complicated manufacturing and high cost, they cannot be widely used, and the main body will break and be damaged when the torque is large. , can not fundamentally solve the problem and there will be safety hazards, not to mention adapting to the requirements of high standards and complex conditions such as railway electrified catenary, it is necessary to explore a new anti-loosening technology to meet the demand

Images