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Non-slip plastic nut

A plastic and nut technology, applied in the direction of nuts, screws, bolts, etc., can solve the problems of easy wear, loosening and even sliding teeth, and reduce the friction torque between thread pairs, so as to increase safety and avoid loosening and sliding teeth. Effect

Active Publication Date: 2018-09-07
SAIC-GM-WULING AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When the plastic nut is tightened on the self-tapping screw, the threaded part of the plastic nut that first contacts the self-tapping screw is prone to wear due to being squeezed and impacted by the self-tapping screw many times. Load, etc.) may reduce or even eliminate the frictional moment between thread pairs, resulting in reduced fastening of plastic nuts, loosening or even sliding teeth, etc.

Method used

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Embodiment Construction

[0013] Such as figure 2 As shown, the present invention discloses a plastic nut 1 with anti-slip teeth. The screw-in end of the inner surface of the threaded hole of the plastic nut 1 is provided with a bevel 2, and the diameter of the screw-in end of the inner surface of the threaded hole is smaller than that of a self-tapping screw. External thread diameter.

[0014] The slope 2 forms an angle of 2 to 4 degrees with the vertical surface of the inner surface of the threaded hole. As a preferred embodiment of the present invention, the slope 2 forms an angle of 3 degrees with the vertical plane of the inner surface of the threaded hole.

[0015] The diameter of the screw-in end of the inner surface of the threaded hole is 1 to 3 mm smaller than the diameter of the external thread of the self-tapping screw. As a preferred embodiment of the present invention, the diameter of the screw-in end of the inner surface of the threaded hole is 2 mm smaller than the diameter of the ou...

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Abstract

The invention provides a thread slip preventive plastic nut. The screw-in end of the inner surface of a threaded hole of the plastic nut is provided with a slope; the diameter of the screw-in end of the threaded hole is less than that of an external thread of a tapping screw. The thread slip preventive plastic nut has the advantages that the nut is used for matching with the tapping screw, thread connection friction and pretension can be still retained for the nut under vibration, impact, variable load and sharp temperature fluctuation, loosening and thread slip are prevented for the nut and fitting safety of a fastener is improved.

Description

technical field [0001] The invention relates to a fastener, in particular to a plastic nut with anti-slip teeth. Background technique [0002] When the plastic nut is tightened on the self-tapping screw, the threaded part of the plastic nut that first contacts the self-tapping screw is prone to wear due to being squeezed and impacted by the self-tapping screw many times. Load, etc.) may reduce or even eliminate the frictional torque between thread pairs, resulting in reduced fastening of plastic nuts, loosening or even sliding teeth. [0003] figure 1 It is a schematic diagram of changes before and after assembly of the plastic nut in the prior art. Contents of the invention [0004] In order to solve the problems in the prior art, the invention provides a plastic nut with anti-slip teeth. [0005] The invention provides a plastic nut with anti-slip teeth. The screw-in end of the inner surface of the screw hole of the plastic nut is provided with a slope, and the diamet...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B39/28F16B37/00
CPCF16B37/00F16B39/28
Inventor 李伟张峰尧永春周喜格蓝先
Owner SAIC-GM-WULING AUTOMOBILE CO LTD
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