Simple retreating stopping screw nail

Abstract

The invention provides a simple retreating stopping screw nail. The simple retreating stopping screw nail comprises an insert bolt, a screw bolt and a screw cap in screw thread matching with the screwbolt, the screw bolt is internally provided with a through hole running through two ends of the screw bolt, the through hole is one polygonal hole, the screw cap is internally provided with a counterbore communicating with an internal thread hole, the projection of the counter bore in the end surface of the screw cap is one polygonal hole, in the state of the screw cap being in threaded connection with the screw bolt, the projection of the counter bore in the plane perpendicular to the axis of the screw bolt is located inside the through hole, the insert bolt is composed of a first column body and a second column body which are fixedly connected, the first column body is in interference fit with the through hole, and the second column body is a polygonal prism matched with the counter bore. According to the simple retreating stopping screw nail, by means of the polygonal coordination of the insert bolt with the screw bolt and the screw cap, retreating caused by screw thread inversionof the screw cap and the screw bolt is prevented, meanwhile, because the first column body is in interference fit with the through hole, so that the stability of connection between the insert bolt and the screw bolt is guaranteed, and the retreating stopping effect of the insert bolt on the screw cap is further guaranteed.

Description

technical field [0001] The invention relates to the technical field of screws, in particular to a simple backstop screw. Background technique [0002] Bolts and nuts are commonly used fasteners in the mechanical field, which have the characteristics of wide application range and convenient operation. However, the bolts and nuts are connected by threads, and the threads are prone to reverse rotation during machine movement or vibration, which will cause the nuts to separate from the bolts, which is not conducive to mechanical safety. [0003] In view of the above situation, at present, there are many kinds of anti-retraction bolts on the market, which can effectively prevent the thread from reversing, thereby preventing the nut from falling off. However, at present, the anti-retraction bolts appearing on the market have complex structures, high processing costs, and inconvenient installation, so they are difficult to popularize. Contents of the invention [0004] Based on...

AI Technical Summary

Problems solved by technology

However, at present, the anti-retraction bolts appearing on the market have complex structures, high processing costs, and inconvenient installation, so they are difficult to popularize.

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