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a composite bolt

A bolt and screw technology, applied in the field of fastener structure design, can solve the problems of waste and high cost, and achieve the effect of reducing manufacturing costs

Inactive Publication Date: 2016-05-04
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing torque nuts are all made of metal materials, and their cost is relatively high, and because the twisted torque mechanism is discarded, it causes great waste

Method used

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  • a composite bolt
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1）

[0012] figure 1 It is a structural schematic diagram of the first structure of the present invention, showing the first specific implementation mode of the present invention.

[0013] This embodiment is a composite bolt, which includes a metal bolt body 1 and a twist-off fastening head 2 made of plastic. Force part 12; the twist-off fastening head 2 includes a coupling part 21 provided with an accommodating cavity, a hexagonal twisting part 22, and a twisting part 23 connecting the hexagonal twisting part 22 and the coupling part 21, the twisting part 23 The outer diameter of the connecting part and the hexagonal twist part 22 are smaller than the connecting part 21; the connecting part 21 is fixed on the hexagonal force-bearing part 12 of the metal bolt body 1 by injection molding, and the hexagonal force-bearing part 12 is located at the coupling part of the twist-off fastening head 2 21 in the accommodating cavity.

[0014] In this embodiment, the hexagonal twist part 22 ...

Embodiment 2）

[0017] figure 2 It is a structural schematic diagram of the second structure of the present invention, showing the second specific implementation mode of the present invention.

[0018] This embodiment is basically the same as Embodiment 1, except that: the adjustment hole 221 is embedded with an anti-deformation cylinder 3 for preventing the twist-off fastening head 2 from being deformed under force during twisting.

[0019] It can be concluded from the above-mentioned embodiment 1 and embodiment 2 that the present invention can simplify the manufacture of composite bolts with different twist-off torques by processing adjustment holes of different sizes by providing circular adjustment holes on the twist-off fastening head. Effectively reduce manufacturing costs.

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PUM

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Abstract

The invention discloses a composite bolt which comprises a bolt body and a twisting-off fastening head, wherein the bolt body comprises a screw rod which is provided with outer screw threads and a hexagonal stressed part which is arranged at one side end of the screw rod; the twisting-off fastening head comprises a connecting part having an accommodating cavity, a hexagonal twisting part, and a twisting-off part connecting the hexagonal twisting part and the connecting part; the outer diameter of the twisting-off part is lower than those of the hexagonal twisting part and the connecting part; the hexagonal stressed part is arranged in the accommodating cavity of the connecting part of the twisting-off fastening head; the hexagonal twisting part of the twisting-off fastening head has a round regulating hole which is concentric to the screw rod; and the bottom wall of the regulating hole is arranged in the twisting part or the connecting part of the twisting-off fastening head. According to the composite bolt disclosed by the invention, the regulating holes differing in size can be processed to simplify manufacturing of the composite bolts differing in twisting moment, so that the manufacturing cost is effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of fastener structure design, and in particular relates to a composite bolt. Background technique [0002] Existing torque nuts are all made of metal materials, and their cost is relatively high, and because the twisted torque mechanisms are discarded, great waste is caused. SUMMARY OF THE INVENTION [0003] The object of the present invention is to provide a composite bolt which is easy to manufacture with different breaking torques. [0004] The technical solution to achieve the purpose of the present invention is: a composite bolt, including a bolt body and a twist-off fastening head, the bolt body includes a screw with external threads and a hexagonal force-bearing part arranged at one side of the screw; the twist-off The type fastening head includes a coupling part provided with an accommodating cavity, a hexagonal twisting part, and a twisting part connecting the hexagonal twisting part and the coup...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B31/00
Inventor 于志刚李志泰王燕王清华王志强
Owner STATE GRID CORP OF CHINA