Fastener for automobile and using method thereof

Abstract

The invention belongs to the technical field of fasteners, and particularly relates to an automobile fastener and a using method thereof.The automobile fastener comprises a first screw, a second screw, a third screw and a fourth screw; two parts are connected together through the fastening piece, then the fourth screw is rotated, the second screw is extruded, the sealing cavity is expanded towards the periphery, and then the connecting strength of the second screw and the threaded hole, the connecting strength of the first screw and the threaded hole and the connecting strength of the third screw and the threaded hole are improved; therefore, the loosening probability of the fastener is reduced, and the connecting strength of the two parts is improved; when the fastener and an installed part are expanded, the fastener can move axially, so that a thread structure is prevented from being broken due to excessive expansion, and the loosening probability of the fastener is reduced; and during dismantling, the fourth screw is rotated firstly, then the pressure in the sealing cavity is reduced, the acting force between the fastener and the threaded hole is reduced, and then the fastener is convenient to dismantle.

Description

technical field [0001] The invention belongs to the technical field of fasteners, in particular to a fastener for automobiles and a method for using the same. Background technique [0002] A fastener is a part that connects two or more parts or components together. Fasteners can be seen everywhere in industrial production, and are often used in automobiles. Fasteners are easy to connect, easy to remove, Reusable and other advantages, but due to the unique nature of the threaded connection, there is a gap between the threads. Due to the uneven road conditions of the car, when the car often walks on the bumpy road, the fasteners are repeatedly vibrated. It is easy to loosen or even fall off, so the anti-loosening of fasteners is particularly important. [0003] The existing anti-loosening of fasteners mainly starts from improving the processing and matching accuracy of threads, reducing the gap between threads to prevent fasteners from loosening, thereby increasing the reliab...

AI Technical Summary

Problems solved by technology

The present invention is mainly used to solve the problem that the existing fasteners mainly start from improving the processing and matching precision of the threads, and reduce the gap between the threads to prevent the fasteners from loosening, but if the gap is too small, the fasteners and automobile parts will increase The processing cost and difficulty of components increase the difficulty of installation and increase the cost of automobile manufacturing, and because the temperature difference between the north and the south is too large, and the temperature difference between winter and summer is too large, when the ambient temperature is high, or some parts (such as engines, turbochargers, etc.) Fasteners in high-temperature environments are prone to thermal expansion, fasteners and parts expand, and fasteners and parts are squeezed against each other, easily breaking threads or parts, affecting the normal operation of the car, and in severe cases safety incidents

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