Anti-dead locking, anti-vibration and loosening-proof bolt/nut structure

Abstract

An improved bolt/nut structure capable of preventing from dead locking and loosening and being vibration resistive, wherein, an internal threaded lining and an external threaded sleeve are made from helix springs with the cross section of each ring thereof in the shape of “]” and are used as an external thread and an internal thread for the bolt and the nut respectively to provide the function of dead locking and loosening and of vibration resisting. A plurality of expansion slits are provided on the internal and external peripheries of the helix springs, the springs with the expansion slits are suitable for use on the surface with collapsing of screw threads to suitably expand, and to confine the screw threads respectively. Moreover, a single or a plurality of helix springs are provided to form the internal threaded lining or the external threaded sleeve of one of various pitch gauges, thereby, the bolt structure has the capability of changing for the coarse and fine threads.

Dependencies are inferred from the claim text.