Fastening kits and combined extensions for fastening kits

Abstract

A fastening kit comprises a bolt and a nut. The bolt comprises a head part and a screw. The screw comprises a first end fixedly connected with the head part, a second end connected with the nut in a threaded mode, and an elastic energy storage component combined with the two ends. A deformation structure corresponding to threaded connection acting force is formed on the portion, between the first end and the second end, of the elastic energy storage component. The fastening force of the fastening kit can be effectively maintained after screwing and fastening are achieved in place through elastic deformation of the fastening kit, and fastening failures caused by vibration, heat expansion and cold contract of the environment after fastening is achieved in place are counteracted. Meanwhile, the single-directional screwing-in structure of the head part of the bolt is matched with the smooth top of the nut so that the fastening structure can not be deconstructed, fastening reliability can be effectively improved, and the fastening kit can not be detached without a destructive means. The invention further provides a combined expanding device utilizing the fastening kit.

Description

technical field [0001] The invention relates to a bolt and an extended sheet of the bolt, in particular to a bolt matched with a nut and an extended sheet of the bolt. Background technique [0002] A common method of plate connection is to use bolts to pass through the through holes opened on the two plates, and cooperate with the nuts to tighten in place using internal and external threads to achieve clamping and fastening. Sometimes the diameter of the bolt head and nut is larger than the diameter of the through hole that accommodates the screw, and the bolt head and nut are directly backlogged on both sides of the connecting plate, and sometimes elastic washers and gaskets are added on both sides of the connecting plate to produce The elastic force of the step tightening direction makes it difficult for the internal and external threads to loosen due to thermal expansion and contraction after the step tightening is in place, and the reverse step gradually occurs until the...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a fastening kit to solve the technical problem that existing nuts and bolts cannot avoid loosening after long-term use

[0005] Another object of the present invention is to provide a combined extension device for the above-mentioned fastening kit, which solves the technical problem that the rigidity and toughness cannot be satisfied when the existing plates are overlapped and extended

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