Locknut

Abstract

The invention discloses a locknut and particularly relates to a locknut used for being connected with a metal plate. The locknut comprises a nut body with internal threads, wherein an annular conical boss is arranged at the top end of the nut body along the periphery of a thread hole; the length of the annular conical boss along the axial direction of the thread hole is 0.8-4 times the thread pitch of the internal threads; a plurality of projection welding stations are arranged at the bottom end of the nut body along the periphery of the thread hole and are used for being welded with the metal plate; the projection welding stations are equidistantly distributed on a concentric circle of the thread hole; and the distance between each projection welding station and the center of the concentric circle is not smaller than the maximum radius of the annular conical boss and is not greater than twice the maximum radius of the annular conical boss. According to the locknut disclosed by the invention, the effective friction forces of the threads are always kept between the metal plate and the nut and a bolt in the vibration process, and the aim of locking is achieved.

Description

technical field [0001] The invention relates to a fastening part in the field of mechanical equipment, in particular to a lock nut used for connecting with a metal plate. Background technique [0002] Various machines and components are inseparable from fasteners in connection assembly. Fasteners can tightly connect two or more different parts, which brings convenience to the machinery industry and is widely used in various fields. However, it has a weakness that cannot be ignored, that is, it will automatically loose, causing the connected parts to disintegrate and fall off, and even cause major accidents. [0003] 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. For example, the commonly used anti-loosening methods include: 1. Friction Anti-loosening, such as figure 1 As shown, a spring washer is placed between the bottom of...

AI Technical Summary

Problems solved by technology

The above method improves the anti-loosening effect to a certain extent for different application occasions, but for example, for the application field connected with metal plates (such as automobile body metal plates), the above-mentioned anti-loosening method is not effective

Although for the connection of the metal plate, there is a method of welding the welding nut to the metal plate first, and then tightening it with the bolt, but this still does not effectively solve the problem of loosening between the nut and the bolt

Images