A non-metallic insert locknut

Abstract

The invention discloses a non-metallic insert anti-loose nut. The non-metallic insert anti-loose nut comprises a nut body, a first non-metal insert and a second non-metal insert, wherein a threaded hole is formed in the nut body in the axial direction, a coaxial counter bore communicating with the threaded hole is formed in the nut body, the bottom end of the counter bore is provided with a firstannular groove facing the direction away from the axis, the first non-metal insert is arranged in the counter bore, moreover, a first annular bulge is arranged on one side, close to the bottom surfaceof the counter bore, of the first non-metal insert, the thickness of the first annular bulge is not smaller than the width of the first annular groove, a second annular groove which is in the same side with the counter bore is further formed in the nut body, and the second non-metal insert is fixed in the second annular groove. According to the non-metallic insert anti-loose nut, a bolt is tightly clamped by using the elastic force of the first non-metal insert, so that the nut has a self-locking and anti-loose function; the first non-metal insert can be taken out through the counter bore, sothat replacement is convenient; and the second non-metal insert is used for making a seal to be formed between the nut and a to-be-fixed part on the outer side, so that external impurities can be effectively prevented from invading, and the service life of the nut is prolonged.

Description

【Technical field】 [0001] The invention relates to the technical field of nuts, in particular to the technical field of a non-metal insert lock nut. 【Background technique】 [0002] The non-metallic insert lock nut is a kind of fastening nut, which mainly includes a nut body and a non-metallic insert whose inner diameter is slightly smaller than the pitch diameter of the thread, embedded in the nut body. When the matching bolt contacts the non-metallic insert, the non-metallic insert is extruded, and the non-metallic insert is squeezed out of the thread, and the bolt thread is tightly "hugged" by the non-metallic insert. Due to the effect of this interference fit, a frictional moment resisting thread rotation is formed, so that the nut has a self-locking and anti-loosening function. Usually, non-metallic inserts are directly embedded in the nut body, and the nut is not well sealed, and rainwater, moisture, dust, etc. are easily immersed in the nut, causing the nut body to rus...

AI Technical Summary

Problems solved by technology

Usually, non-metallic inserts are directly embedded in the nut body, and the nut is not well sealed, and rainwater, moisture, dust, etc. are easily immersed in the nut, causing the nut body to rust, and the non-metallic insert absorbs water and swells. It not only affects the service life of the nut but also makes it difficult to remove and replace the nut

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