End surface taper centering and interlocking lock nut suite

Abstract

The invention discloses an end surface taper centering and interlocking lock nut suite which comprises an upper nut with an axial threaded through hole I and a lower nut with an axial threaded throughhole II; one end surface of the upper nut is configured to be a boss; the end surface of the boss is tapered; one end surface of the lower nut is provided with a cylindrical groove adapted to the boss in a sunken forming manner; a taper adapted to the end surface of the boss is made at a contact plane of the bottom of the groove and the end surface of the boss; and in an assembly state, the end surface of the boss is arranged at the bottom of the groove, the central axis of the threaded through hole I coincides with the central axis of the threaded through hole II, and the boss of the upper nut is in clearance fit with the cylindrical groove of the lower nut. For the nut suite provided by the invention, by adopting a novel end surface taper centering and interlocking lock nut suite whichadopts end surface taper centering to avoid the situation that lateral force is additionally applied to a screw rod by eccentricity, the thread lateral stress caused by matching with side surface of an eccentric cone is avoided, and the safety and the anti-seismic performance of the novel end surface taper centering and interlocking lock nut suite are both superior to an existing shockproof nut inthe market.

Description

technical field [0001] The invention relates to the field of fasteners, in particular to an end face taper centering interlock locknut set. Background technique [0002] Japan's eccentric nut utilizes the eccentric taper surface fit to achieve the anti-vibration effect similar to a wedge wedged into the thread. The eccentric nut has been widely used in the high-speed rail industry, is convenient for disassembly and maintenance, and can be used for many times. When the upper and lower nuts are locked, because the eccentric angle of the parallel offset will allow the lower nut to transmit the vibration force from the eccentric contact surface to the upper nut in one direction, therefore, it will not happen that the full contact surface of the general nut will cause the vibration to be transmitted evenly. Nut is loose. However, the eccentric taper surface of the eccentric nut is likely to generate additional lateral force applied to the thread during assembly, which affects t...

AI Technical Summary

Problems solved by technology

However, the eccentric taper surface of the eccentric nut tends to generate additional lateral force applied to the thread during assembly, which affects the service effect or life of the thread

Also, because the eccentric nut is generally subjected to lateral pressure and force, the screw rod will bear additional lateral force, which will cause the risk of fracture caused by the lateral force to the screw rod

Therefore, from a safety point of view, if the nut is not loose but the screw is broken, there is also a great potential safety hazard.

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