Anti-convolution screw and nut combination

Abstract

The invention discloses an anti-convolution screw and nut combination, and aims to provide the anti-convolution screw and nut combination which is convenient to use, capable of directly manufacturing anti-convolution structures on a screw and a nut, capable of being produced in batches and capable of preventing convolution and loosening through cooperative use of the screw and the nut during use. The anti-convolution screw and nut combination comprises a screw head, a threaded rod and the nut, wherein the threaded rod is provided with an elastic anti-convolution structure, a tooth tip protruding out of the outer diameter of a thread is formed at the intersection position of a thread tooth crest of an anti-convolution rack and a first groove, and the pointing direction of a top tip of the tooth tip is opposite to the screwing-in direction of the thread; a rear tooth tip is formed at the intersection position of the anti-convolution rack and the outer diameter of a second groove, the rear tooth tip makes contact with the second groove, and at least one blocking groove is formed in the nut; and when the screw convolutes due to reasons such as manual disassembly or vibration, the screw cannot be disassembled or convolute and loosen due to the fact that the elastic tooth tip is embedded into the blocking groove.

Description

technical field [0001] The invention relates to the field of hardware tools used for connection and fixing, more specifically, an anti-rotation screw and nut combination. Background technique [0002] At present, the fixing methods of parts in many products are mostly screws and nuts or directly set threaded holes or fixing screws at the corresponding positions of the parts for fastening, especially when the screws with a pitch of 3 mm and above are in continuous use, the screw There is a phenomenon of gradual turning and loosening between the screw and the nut, but some parts connected by screws hope that the screw will never loosen. The current anti-turning screws generally use additional accessories to limit the loosening and turning of the screw or nut. . [0003] A "locking screw assembly" disclosed in Chinese patent literature, its publication number is CN107575463A, the "locking screw assembly" in this technical solution is composed of a long screw and a hollow screw...

AI Technical Summary

Problems solved by technology

[0004] The present invention is dedicated to solving the defects that existing anti-rotation screws with a pitch equal to or greater than 3 mm need to ream the screw holes and cooperate with each other to make them, which brings inconvenience to mass production and practical use.

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