Pushing-needle type anti-theft nut

Abstract

The invention discloses a pushing-needle type anti-theft nut developed on the basis of a rolling needle type anti-theft bolt, which is an anti-theft nut with excellent anti-theft performance and can also be used as an anti-theft nut with an anti-theft function. The pushing-needle type anti-theft nut comprises a nut body and a pushing needle, wherein the pushing needle is extruded into a groove for one-way braking in an installation process, thus the sensitivity of the anti-theft function and anti-dismounting moment are improved and anti-theft effect is ensured. The pushing-needle type anti-theft nut can be combined with a nut with an anti-theft appearance to form a secondary anti-theft nut. The pushing-needle type anti-theft nut has the advantages of being reliable in the anti-theft function, reasonably reducing matching precision of manufacture and installation, eliminating tolerance clearance and increasing the anti-dismounting torque, and is suitable for batch production and wide application.

Description

Technical field: [0001] The invention relates to a mechanical fastener, in particular to an anti-theft nut. Background technique: [0002] For the utility model patent applied on March 13, 2009, the name is needle roller anti-theft bolt. Bolts, the anti-unloading torque test found that its advantage is that the anti-unloading torque of the ball-type anti-theft nut with a one-way point brake structure is significantly improved, but the common disadvantage is: due to the one-way force groove of the needle-type anti-theft bolt The diameter of the needle roller and the one-way force groove of the ball-type anti-theft nut and the clearance tolerance between the outer circle of the ball are relatively high, resulting in unstable anti-theft effect. Invention content: [0003] The present invention improves and enhances the design basis of the needle roller anti-theft bolt and develops a tapered needle anti-theft nut with simple structure and reliable anti-theft performance. [...

AI Technical Summary

Problems solved by technology

[0002] For the utility model patent applied on March 13, 2009, the name is needle roller anti-theft bolt. Bolts, the anti-unloading torque test found that its advantage is that the anti-unloading torque of the ball-type anti-theft nut with a one-way point brake structure is significantly improved, but the common disadvantage is: due to the one-way force groove of the needle-type anti-theft bolt The diameter of the needle roller and the one-way force groove of the ball-type anti-theft nut and the clearance tolerance between the outer circle of the ball are relatively high, resulting in unstable anti-theft effect

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