Nut anti-loosening structure and anti-loosening thread pair

Abstract

The invention relates to the fastener technology, and particularly discloses a nut anti-loosening structure and an anti-loosening thread pair. The nut anti-loosening structure comprises a main nut, a fixed end used for being connected to a bolt in a screwed mode, an auxiliary nut, a fixed end used for being connected to the bolt in a screwed mode and located on the outer side of the main nut, and an auxiliary gasket which is a metal gasket, used for being arranged at the fixed end of the bolt in a sleeving mode and located between the main nut and the auxiliary nut. Wherein after the auxiliary gasket is extruded by the main nut and the auxiliary nut, the auxiliary gasket is elastically deformed. The anti-loosening thread pair comprises a bolt, one end of the bolt is a bolt head, the other end of the bolt is a fixed end, and the nut anti-loosening structure is arranged at the fixed end of the bolt. A to-be-fastened piece is installed between the bolt head and the nut anti-loosening structure. The invention has the beneficial effects that the defects of a rubber gasket are overcome, high temperature resistance and high pressure resistance are realized, and the auxiliary gasket made of stainless steel solves the problems of corrosion, aging and easiness in damage due to vibration friction. The method is especially suitable for occasions where rubber is not suitable.

Description

technical field [0001] The invention relates to a fastener, in particular to a nut anti-loosening structure and an anti-loosening thread pair. Background technique [0002] The existing double-nut friction and anti-loose is that after the two nuts with the same rotation direction are tightened, the two nuts are twisted against each other, so that the top force is generated between the two nuts, so that the main nut and the spring washer at the bottom are generated. Friction, and friction with the auxiliary nut above, the double friction achieves the effect of pre-tightening, the two nuts will have a force to squeeze each other, thus preventing loosening, but there is no gap between the two nuts and the bolts. The friction is large enough to bind the three into one, and sometimes the two nuts are loosened separately or at the same time. A loose washer, a rubber washer is arranged around the outer thread of the bolt between the main nut and the auxiliary nut, and the auxiliar...

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Problems solved by technology

[0003] However, the washer clamped between the main nut and the auxiliary nut of the above-mentioned bolt and nut locking device is a rubber washer, and the rubber washer is not resistant to high temperature, high pressure, corrosion, aging, and vibration. Inevitable shortcomings such as damage and inability to be reused many times

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