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Self-tapping screw used for plastic piece assembly

A technology of self-tapping screws and plastic parts, which is applied in the direction of screws, connecting components, threaded fasteners, etc., can solve the problems of fasteners falling off, and achieve the effects of preventing falling off, reducing scrap, and reducing product costs

Inactive Publication Date: 2016-03-23
BONAIRE AUTOMOTIVE ELECTRICAL SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] How to improve the reliability of the assembly of plastic parts; prevent plastic parts with threaded bottom holes from being scrapped due to disassembly; prevent plastic threaded bottom holes from sliding due to the influence of temperature changes on the size of plastic parts; Influenced by various factors, the fasteners used in plastic parts fall off

Method used

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  • Self-tapping screw used for plastic piece assembly
  • Self-tapping screw used for plastic piece assembly
  • Self-tapping screw used for plastic piece assembly

Examples

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Embodiment Construction

[0014] Such as Figure 1 ~ Figure 3 A self-tapping screw for assembly of plastic parts is shown, comprising a connected screw body and a nut 5, the screw body is provided with a large-diameter thread 1 and a small-diameter thread 2, and the thread teeth of the large-diameter thread 1 and the The thread teeth of the small-diameter thread 2 are arranged at intervals.

[0015] The installation method of self-tapping screws for plastic parts assembly includes the following steps:

[0016] a) Turn the nut to screw the screw body into the plastic part. During the screwing process, the large-diameter thread plays a very good cutting-in fixing role, and the small-diameter thread has a guiding and auxiliary positioning function. The simultaneous functions of the two diameter threads can Self-tapping screws are fixed accurately and without damage to the threaded bottom holes of plastic parts;

[0017] b) The flange surface is pressed against the surface of the plastic part to increase...

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PUM

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Abstract

The invention discloses a self-tapping screw used for plastic piece assembly. The self-tapping screw comprises a screw body and a nut which are mutually connected, wherein the screw body is provided with large-diameter threads and small-diameter threads; and screw teeth of the large-diameter threads and the small-diameter threads are mutually spaced. Due to the adoption of the structure, the self-tapping screw used for plastic piece assembly has the following advantages that 1, the assembly reliability of a plastic piece is improved; 2, the scrap of the plastic piece caused by the thread bottom hole change is reduced; 3, a fastener is prevented from dropping in the use process; and 4, the product cost is reduced, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of screws, in particular to a self-tapping screw used for assembling plastic parts. Background technique [0002] With the continuous development of modern industry, plastic parts are more and more widely used in various fields of our life, especially in the field of automobiles. , more and more applications in automotive products. [0003] How to improve the reliability of the assembly of plastic parts; prevent plastic parts with threaded bottom holes from being scrapped due to disassembly; prevent plastic thread bottom holes from sliding due to the influence of temperature changes on the size of plastic parts; Due to the influence of factors, the fasteners used in plastic parts fall off. The above problems are what we urgently need to solve in the assembly design of plastic parts. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a self-tappin...

Claims

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Application Information

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IPC IPC(8): F16B25/00
CPCF16B25/0015
Inventor 方向华张仕伟潘帮斌潘华
Owner BONAIRE AUTOMOTIVE ELECTRICAL SYST
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