Lock nut

Abstract

The invention provides an unloading-prevention nut, belonging to the mechanical technology field. The unloading-prevention nut solves the problems that the existing unloading-prevention nut has a plurality of components, complex production process, tedious installation and the like. The unloading-prevention nut comprises an inner core and an outer shell which is connected at the outer side of theinner core in a sheathing way; the inner side surface of the inner core is provided with threads; the end surface of the outer shell is provided with a first retaining edge; the inner end surface of the inner core is provided with a second retaining edge which leans against on the first retaining edge; the outer end surface of the inner core is provided with a clamping and fixing part which is fixedly connected with the outer shell and can prevent the inner core from detaching from the outer shell; the first retaining edge is provided with a plurality of slope slots; the second retaining edgeis provided with a plurality of slopes which are matched with the slope slots and can prevent the inner core from rotating toward the loosening direction; and an elastic part is arranged between the clamping and fixing part and the outer end surface of the inner core. The unloading-prevention nut has the advantages of simple structure, convenient installation and processing and low cost.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a fastener, in particular to an anti-unloading nut. Background technique [0002] Nut connections are widely used, such as gas meters and gas pipelines are usually connected by nuts. Because the gas meter is installed in the user's home, in order to prevent illegal gas theft and facilitate the installation of the gas meter, it is necessary to adopt a convenient anti-unloading nut for connection. [0003] Chinese patent document CN2321969Y provides a "anti-unloading nut", which is composed of an inner core and an outer core. The inner core is installed in the outer core, and the side of the inner core is provided with several inclined grooves along the circumferential direction, and cylindrical needle rollers are arranged between the inclined grooves and the inner side of the outer core. When installing the anti-dismounting nut, turn the outer core along the deep end of the slop...

AI Technical Summary

Problems solved by technology

Obviously, once the anti-removal nut is installed, it cannot be disassembled

However, during the installation process, the needle rollers must first be put into the slope groove and then put into the outer core. Due to the large number of needle rollers, the installation is more difficult, and the product cost is also increased.

[0004] Other existing anti-unloading nuts also have the defects of many parts and complex production process

Images