Loosing and theft preventing bolt structure body

Abstract

The invention discloses a bolt structure body, which comprises a nut, two washers and a bolt, wherein the bottom rim of a bolt head and the upper rim of the nut are provided with a wedgy tooth-shaped inclined plane with one higher edge and one lower edge respectively, and the connecting parts of the wedgy tooth-shaped inclined planes form retaining surfaces; included angles alpha between the retaining surfaces and a plane of the bolt head and a plane of the nut are acute angles; one surface of each washer forms an inclined plane which corresponds to and is matched with the wedgy tooth-shaped inclined planes of the bolt head and the nut; the connecting parts of the inclined planes form bearing surfaces; included angles beta between the bearing surfaces and planes of the washers are acute angles; and the other surface of the washer is provided with an insertion strip or a bump, and the washers are irregular round. The bolt structure body does not fall off under the conditions of breeze vibration, spiral vibration and the like, the wedgy tooth-shaped inclined planes of the acute angles are meshed tightly, and the construction requirement is reduced simultaneously; the bolt structure body has better anti-theft function, a screw driver and other tools cannot find the position of force application, and only a special tool is used to take the bolt structure body down; the curve insertion strips or the bumps can increase frictional resistance and prevent rusting connection; and a manufacturing process of the bumps is simple.

Description

technical field [0001] The present invention relates to a detachable anti-loosening bolt structure, and further relates to a detachable anti-loosening and anti-theft bolt structure. Background technique [0002] As we all know, bolts, as basic parts for connecting various mechanical components and devices, are widely used in various mechanical equipment connected by flanges. According to the current domestic situation, the anti-theft of iron towers is all realized by using anti-theft bolts, so anti-theft lock nuts have been used all the time. Although the anti-theft lock nut has solved the problem of anti-theft, it brings great difficulties to transformation construction and emergency construction because it cannot be disassembled. Especially in 2008, when towers were covered with ice in a large area in the south, during the emergency project, since the anti-theft lock nuts could not be disassembled with tools, the bolts had to be cut off by gas cutting. Workers had to carr...

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Problems solved by technology

[0004] In addition, US5626449A also discloses a similar bolt, but the angle between the retaining surface on the washer and the washer plane (horizontal plane) is an obtuse angle, which has the same problem as CN2692402Y, and also has high requirements for construction personnel.

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