Locking screw

Abstract

The invention relates to a locking screw comprising a head and a shank extending from one side of the head. The peripheral surface of the shank is provided with an external thread; two sides of a crest of the external thread incline to a vertical line perpendicular to the center axis of the shank, at different angles including a first inclination angle and a second inclination angle; an angle of thread of the locking screw ranges from 61 degrees to 67 degrees; the first inclination angle of the angle of thread ranges from 32 degrees to 40 degrees; the second inclination angle of the angle of thread ranges from 25 degrees to 29 degrees; therefore, the external thread of the locking screw and an internal thread of an object form a standard 60-degree angle of thread for screwing use, and the upper and lower edges of two flanks of the external thread are in interference fit with the internal thread so that good locking effect is achieved.

Description

technical field [0001] The invention relates to an anti-loosening screw, especially a kind of external thread with two sides of the spiral belly forming unequal inclination angles, and when the anti-loosening screw is screwed into an object with a standard internal thread angle of 60°, the anti-loosening The external thread of the screw is a threaded structure that forms an interference fit with the internal thread of the object. Background technique [0002] The combination of many objects in daily life is screwed into objects such as objects with internal threads for screwing and positioning. In order to prevent the screws from loosening after being screwed with the internal threads of the object, the screws are usually used to wear a C-shaped elastic Washer (Spring Washer), when the screw is screwed into the internal thread of the object and the elastic washer is deformed, the elastic force of the elastic washer will form a reaction force against the object and increase t...

AI Technical Summary

Problems solved by technology

[0002] The combination of many objects in daily life is screwed into objects such as objects with internal threads for screwing and positioning. In order to prevent the screws from loosening after being screwed with the internal threads of the object, the screws are usually used to wear a C-shaped elastic Washer (Spring Washer), when the screw is screwed into the internal thread of the object and the elastic washer is deformed, the elastic force of the elastic washer will form a reaction force against the object and increase the anti-loosening effect. However, this The setting of this kind of elastic gasket is not applicable in some cramped and narrow spaces

For this reason, another company installs a coating on the internal thread of the screw or object, so that the thread lock between the screw and the internal thread of the object can be filled in the screw thread gap by the compressive deformation of the coating, thereby It produces an anti-loosening effect, so that the screw and the internal thread of the object are not easy to loosen after being screwed together. However, providing a coating on the internal thread of the screw or object will greatly increase the manufacturing cost. Therefore, today's anti-loosening screw or thread lock Components are still not ideal and need to be improved

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