Anti-loosening anti-theft nut

Abstract

The spiral wedge locked anti-theft nut consists of one chamfered nut, one spiral wedge and one thin wall sleeve. The chamfered nut has standard triangular inner thread, hexagonal outside and one end with cylindrical outside and chamfered inner conic surface. The thin wall sleeve has one large hole end interference fitting the cylindrical outside of the chamfered nut and one small hole end with inner thread of one turn and one opening. The spiral wedge is located in the inner conic surface of the chamfered nut and fixed by the thread in the thin wall sleeve, with the opening pushing the tail of large end. The spiral wedge locked anti-theft nut can eliminate the gap between the nut and the screw to reach locking and anti-theft aim.

Description

technical field [0001] The invention relates to an anti-loosening and anti-theft nut, in particular to a screw wedge locking type anti-loosening and anti-theft nut, which belongs to the technical field of machinery. Background technique [0002] Since the screw wedge locking nut anti-loosening anti-theft device came out in 1991 (see Chinese patent document 91220429.X), it was improved in 1995 (see Chinese patent document 95240393.5) without changing the standard bolt and nut structure, and without weakening the thread tightness. The mechanical strength of the firmware, the anti-loose and anti-theft structure is simple, and the advantages of stable performance are welcomed by the majority of users. However, its insurmountable disadvantage is that it is troublesome to install, especially the spiral wedge, which is very inconvenient to install due to its small size. Because the spiral wedge locking type nut of original design is to be combined with a hexagonal nut (hereinafter...

AI Technical Summary

Problems solved by technology

Since you must take off your gloves when installing the spiral wedge, you can clamp the spiral wedge into the spiral groove of the bolt with bare hands. Once the weather is cold and the outdoor temperature reaches tens of degrees below zero, the installer must not wear it on the iron tower in the field. Gloves are difficult to install

In addition, the spiral wedge is small in size and light in weight. It slips out of the hand when it is installed, and it is difficult to find it if it is lost from the iron tower or microwave communication tower.

Although experts in the past ten years have agreed that the double anti-nut has an ingenious concept and reliable anti-loosening and anti-theft performance, but its cumbersome installation procedures and clumsy installation tools have greatly restricted its wide application and promotion.

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