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A variable diameter fastening screw

A technology for fastening screws and variable-diameter thread sections, which is applied in the direction of threaded fasteners, screws, connecting components, etc., which can solve the problem of unusable machine base, time-consuming repair of screw holes, damage or expansion of screw or screw hole contact parts, etc. problem, to achieve the effect of convenient and reliable choice

Active Publication Date: 2019-03-08
沈建雄
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Maintenance is inseparable from the removal of fasteners, that is, bolts or screws that fasten. Disassembly often causes slight damage or enlargement of the contact part of the screw or screw hole. It is easy to replace the new screw, but after the screw hole on the device is damaged and enlarged, it is difficult to lock it again even with a new screw. The traditional solution is to re-tap the screw hole , replace the fastening screws with a larger size, resulting in time-consuming repair of the screw holes and the unusable machine base without machining allowance, which takes a long time and requires special tapping equipment, etc.

Method used

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  • A variable diameter fastening screw
  • A variable diameter fastening screw
  • A variable diameter fastening screw

Examples

Experimental program
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Effect test

Embodiment Construction

[0014] refer to figure 1 with figure 2 , a variable-diameter fastening screw, has a head 1 and a threaded section for tool operation, and the threaded section includes a standard threaded section 2 with a head 1 and a reduced-diameter threaded section 3; one end of the reduced-diameter threaded section 3 is provided with a wire Tapping head 4, variable-diameter thread section 3 is consistent with the thread specifications of standard thread section 2. The tap head 4 forms a reliable fastening relationship by tapping or extruding new holes.

[0015] Further, the diameter of the variable-diameter thread section 3 is larger than the standard thread section 2, and the diameter is in the range of 0.10mm to 0.80mm; and the length of the variable-diameter section thread 2 and the standard section thread 3 is determined according to needs.

[0016] In this illustration, the countersunk head fastening screw is taken as an example, which is set at one end of the standard thread secti...

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PUM

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Abstract

The invention relates to a reducing fastening screw. The reducing fastening screw is provided with a screw tap head and a threaded section and is characterized in that the threaded section comprises a standard threaded section body and a reducing threaded section body. The reducing fastening screw is provided with a double-threaded-section structure, one section is the standard threaded section body, the other section is the reducing threaded section body with the diameter increased, a reliable fastening relation is formed due to the fact that the reducing threaded section body is tightly locked in a screw hole incapable of fastening due to a damaged thread, and a convenient and reliable choice is provided for the maintenance industry.

Description

Technical field: [0001] The invention belongs to the field of fasteners, and in particular relates to a variable-diameter fastening screw, in particular, a screw with constant thread specifications, only increasing the diameter of the variable-diameter section, which can be directly tightened by a screw tap or an extrusion screw tap, and is suitable for maintenance. when retightening. Background technique: [0002] The form and structure of existing screws or bolts all have international metric and imperial standards, which is convenient for use in the manufacturing industry. Equipment maintenance is the best way to prolong the service life and save resources, and is often the best way to deal with emergencies, which can greatly save the waiting time for purchasing new equipment. Equipment maintenance is also an indispensable industry. Maintenance is inseparable from the removal of fasteners, that is, bolts or screws that fasten. Disassembly often causes slight damage or e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B35/04
CPCF16B35/041
Inventor 沈建雄
Owner 沈建雄