Nut

Abstract

The invention discloses a nut. The nut comprises nut bodies comprising the first nut body and the second nut body located above the first nut body, wherein the external diameter of the second nut body is smaller than that of the first nut body, the lower portion of the first nut body is provided with a transition cylinder with the external diameter being smaller than the diameter of the inscribed circle of the first nut body, the bottom of the transition cylinder is provided with an installation piece extending outwards, the lower bottom surface of the installation piece is an arch-shaped surface concaved inwards, and a threaded through hole of an oval structure is arranged in the nut bodies. As the threaded through hole is an oval hole, the nut is difficult to screw up or unscrew in screwing up and unscrewing processes, the nut falls off from a stud hardly after being screwed up because of inconformity of the hole diameters under the condition that vibration is serious, and use safe performance of a machine is improved. The nut is good in looseness preventing performance and long in service life and has good use value and economical value.

Description

technical field [0001] The invention relates to a nut and belongs to the technical field of nuts. Background technique [0002] It is a common technical means to use nuts and bolts to fix parts between parts in the machinery industry. The common structure of the nut is to set a circular threaded hole in the hex nut body. However, during the use of this type of nut on aerospace and aviation equipment, the vibration is very severe when the equipment is used in the air. After long-term use, the nut is prone to loosening and finally falls off. This is a very deadly hazard for aviation equipment. Moreover, existing nuts are often tightened or loosened by tools such as wrenches during use. After long-term use, the six corners of the nuts are gradually worn away. Using tools such as wrenches can no longer clamp the nuts, and it is impossible to tighten or loosen them. unscrew. Especially in the field of aerospace, the specifications of the nuts used are much higher than those o...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a nut. Because the threaded hole of this type of nut is an elliptical structure, it is not easy to fall off after being tightened in the use environment with relatively large vibration, and this type of nut solves the problem of existing problems. After the corners of the nut are worn, it is difficult to tighten or loosen. During use, the anti-loosening performance of this type of nut is very good

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