Detachable antitheft tightening assembly

Abstract

A detachable antitheft tightening assembly comprises a bolt, a nut, a nut protecting ring and a screw head protecting ring. The nut protecting ring and the screw head protecting ring cover a nut working surface or a screw head working surface. The bolt consists of a screw and a screw head which are integrated. The periphery of a screw hole of the nut working surface is provided with a circle of tightening platform projecting outwards axially. The tightening platform can be embedded into a mounting through hole of the nut protecting ring. A circle of tightening plane projecting outwards axiallys also arranged on the screw head working surface and around the base part of the screw. The tightening plane can be embedded into a mounting through hole of the screw head protecting ring. Due to the additional arrangement of the tightening platform and the tightening plane, a tightening surface of the nut or the screw head is directly supported by the tightening platform and the tightening plane. The tightening assembly can achieve the looseness-and theft-prevention functions so that a common tool cannot undergo tightening or loosening operations. In addition, the tightening assembly is convenient to process and has low requirement on accuracy, and the pre-tightening effect is particularly good. The tightening assembly can be widely used in electric transmission and transformation devices, express way guardrails, railway facilities and the like.

Description

【Technical field】 [0001] The invention relates to a fastening assembly with anti-loosening and anti-theft functions. 【Background technique】 [0002] The Chinese patent No. 032293747 "A Fastener with Nut" that I applied for discloses a fastener that includes a "T"-shaped bolt in the longitudinal section. The bolt is divided into two parts: the screw rod and the screw head. The characteristic is that the screw head and the matching nut are all pentagonal, the axial three-dimensional shape of the nut and the screw head is a pentagonal cone, and the five corners are arc angles, and each arc angle corresponds to a Elastic side. Thereby well solved the drawback that prior art generally adopts hexagonal nut and screw head, is easy to be tightened by conventional screwdriver such as wrench, anti-loosening anti-theft performance is poor. However, there is still room for further improvement in the anti-loosening and anti-theft performance of this pentagonal fastening assembly. For ...

AI Technical Summary

Problems solved by technology

[0003] After the protective ring is added to the above products, although the problem of the exposed elastic surface has been solved and the safety and reliability have been improved, the problems of difficult processing and high precision requirements have been exposed through practice: 1. It is easy to stamp the protective ring with thick sheet material Cracking, low yield and waste of materials; when thin sheets are used, the processing requirements for the contact surface of the screw head, nut and protective ring are greatly increased. If the flatness and flatness of the contact surface cannot be guaranteed, serious problems will occur. Compromise the safety performance of fasteners

2. When in use, it is usually necessary to set a gasket on the outside of the protective ring to clamp the workpiece between the two protective rings. However, this structure is inconvenient to install, especially when working at heights, one more part means one more It is troublesome, and the second is that the poor integrity affects the pre-tightening effect of the fasteners.

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