Nut structure and special spanner thereof

Abstract

The invention provides a nut structure and a special spanner thereof, and belongs to the field of mechanical fastening devices. The special spanner solves the problems that it is troublesome to install existing burglarproof nuts, and hidden safety hazards occur in installation. The nut structure comprises a nut cover of which the outer wall is in a shape of a circular cover, and further comprisesa burglarproof cover of which the inner wall is in a shape of circular holes, the outer wall of the burglarproof cover is in a shape of a regular hexagon, and the burglarproof cover covers the nut cover; a burglarproof mechanism is arranged between the nut cover and the burglarproof cover, and comprises a burglarproof groove located in the outer wall of the nut cover, the bottom of the burglarproof groove is provided with several toothed grooves which are distributed in the circumferential direction of the nut cover and are linked with one another, the toothed grooves are of a one-way sawtoothstructure, the groove walls of the two sides of each toothed groove are taken as the stopping face and the movable face respectively, and clamping grooves are formed in the portions, at the intersections of the stopping faces and the movable faces, of the bottoms of the toothed grooves. The burglarproof mechanism furthermore comprises six pillar grooves which are formed in the inner wall of the burglarproof cover, clamping pillars with magnetism are movably embedded in the pillar grooves, and a two-way restoration mechanism is arranged between the clamping pillars and the pillar grooves. Thenut structure is convenient and efficient to install, and high in safety, and the special spanner has higher universality.

Description

technical field [0001] The invention belongs to the technical field of mechanical fastening devices, and relates to a nut structure and a special wrench thereof. Background technique [0002] Fasteners include bolts and nuts that are screwed together. In order to ensure safety, railway or electric power departments usually use fasteners with anti-theft function. [0003] For example, the application number is 201020186530.7, and the name is a Chinese utility model patent named "All-inclusive twist-off anti-theft nut". It connects the nut body and the protective jacket through glue. The adhesive connection is torn and broken, so that the nut body cannot be disassembled to prevent theft. However, it can only be installed once and is not suitable for equipment that needs to be disassembled and maintained. [0004] The existing application number is 200420011250.7, which is a Chinese utility model patent named "detachable anti-theft nut and special disassembly sleeve used in co...

AI Technical Summary

Problems solved by technology

[0005] 1. The special disassembly sleeve is also required during the installation of the nut, which makes the installation process very troublesome;

[0006] 2. The special disassembly sleeve can only be used for the anti-theft nut, and cannot be used for ordinary hex nuts, and has poor versatility;

[0007] 3. It is easy to damage the cover from the outside, and push the inner pin into the nut, so that the nut and the jacket are relatively connected, which poses a safety hazard;

[0008] 4. After the magnet on the special disassembly sleeve repels the domestic pin and the installation is completed, another special tool is needed to suck the domestic pin into the jacket to prevent theft, which is very troublesome

Images