Improved self-tapping screw

A technology of self-tapping screws and self-tapping threads, which is applied in the direction of screws, threaded fasteners, connecting components, etc., can solve the problems of low work efficiency, damaged screw heads, unsightly and safe, etc., and achieves simple processing and easy screw head appearance Leakage, wide range of effects

Inactive Publication Date: 2017-03-15
JIANGSU DONGQI STANDARD PARTS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, in some occasions where screws are used, in order to avoid the unsightly appearance or potential safety hazards caused by the exposure of the screw cap, people usually knock the screw head and embed it into the physical interior. This method requires a lot of work. , the work efficiency is low, and the second is that it will damage the screw head

Method used

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  • Improved self-tapping screw

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Embodiment 1

[0014] Such as figure 1 As shown, a kind of improved self-tapping screw of the present invention comprises nut 1, screw rod 2, and the outer edge of screw rod 2 is provided with self-tapping thread 5, is provided with helix and self-tapping thread 5 between adjacent self-tapping threads 5 The assist thread 6 in the opposite direction, the upper end of the screw rod 2 has an inwardly concave screw connecting portion 3, and the lower end of the nut 1 has a protruding nut connecting portion 4, the screw connecting portion 3 is a screw hole with an internal thread, so The nut connection part 4 is a connecting rod with an external thread.

[0015] Preferably, as an embodiment, the nut 1 is provided with a handle 7 .

[0016] Preferably, as another possible embodiment, the outer surface of the screw 2 is provided with a polytetrafluoroethylene anti-seizure layer 8 .

[0017] The self-tapping screw of the present invention is easy to process and easy to assemble. When in use, first...

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PUM

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Abstract

The invention relates to a screw, in particular to an improved self-tapping screw. The technical scheme of the invention is that the improved self-tapping screw includes a screw cap and a screw rod; a connection segment is arranged between the screw cap and the screw rod; a screw head is arranged on the lower end of the screw rod; self-tapping threads are arranged on the outer periphery of the screw rod; aid-tapping threads are arranged between every two adjacent self-tapping threads, wherein the spiral direction of the aid-tapping threads is counter to the spiral direction of the self-tapping threads; and a square pad is arranged under the screw cap. The advantages of the invention are that the improved self-tapping screw is simple to machine and assemble, is remarkable in antiskid effect, is high in cutting strength, and has a good use effect.

Description

technical field [0001] The invention relates to a screw, in particular to an improved self-tapping screw. Background technique [0002] Screws are fasteners used to fix objects, and are widely used. Usually, the screws are installed in the screw holes of the object to be fixed and the object connected with the fixed object, and then the fixing can be implemented. The self-tapping screw includes a nail cap and a nail body. The nail cap has a straight or cross-shaped opening for easy installation. The nail body has threads, and the threads are arranged on the nail body in a spiral shape. Rotate in the same direction, and the screw can be screwed into the object to install related objects. At present, in some occasions where screws are used, in order to avoid the unsightly appearance or potential safety hazards caused by the exposure of the screw cap, people usually knock the screw head and embed it into the physical interior. This method requires a lot of work. , low work ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B25/00
Inventor 徐倚山徐小山沈峰朱勇刚
Owner JIANGSU DONGQI STANDARD PARTS
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