Expansion bolt

A technology of expansion screws and expansion sleeves, applied in the direction of screws, nuts, bolts, etc., which can solve the problems of complex installation of expansion screws, easy loosening, and potential safety hazards of screws

Inactive Publication Date: 2017-03-08
何志元
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the existing expansion screws are complicated to install, easy to loosen, and the remaining screws after disassembly cause potential safety hazards

Method used

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specific Embodiment approach

[0034] During the installation process, insert the expansion screw into the installation hole, clamp the head of the expansion screw with a wrench or a special screw tool, and screw it tightly. The wedge-shaped head of the screw continues to push up into the expansion sleeve, and the cover of the expansion sleeve Extruded, and due to the existence of the expansion gap, the expansion sleeve expands outward along the through hole. At this time, the strip-shaped ribs on the outer surface of the expansion sleeve will be more squeezed and clamped to the wall or object outside the installation hole. , to improve the firmness of the clamping, so that the installation and fixing of the expansion screw is reliable and does not loosen, and the screw and the hexagonal head are all inside the wall, which will not be exposed to the sun and rain, and will not be easily weathered and rusted.

[0035] During the disassembly process, if an ordinary wrench is used, use the wrench to clamp the he...

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PUM

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Abstract

The invention discloses an expansion bolt which comprises a bolt main body and an expansion sleeve, wherein the bolt main body comprises a hexagon head and a screw rod; a threaded part is arranged on the middle part of the screw rod; a wedge-shaped head part is arranged at the outer end of the screw rod; a gasket is sleeved on the screw rod; an inner threaded hole which is matched with the threaded part is formed in the expansion sleeve; one end of the expansion sleeve penetrates through the wedge-shaped head part and then is sleeved on the threaded part; a plurality of opening expansion gaps are formed in the end face at the other end of the expansion sleeve; and a plurality of bar-shaped flanges are bulged on an outer side wall of the expansion sleeve at intervals. According to the invention, in a mounting process, after the hexagon head is tightened, the wedge-shaped head part of the screw rod is jacked toward the interior of the expansion sleeve, the expansion sleeve is expanded due to the existence of the expansion gaps, meanwhile, the wall is more tightly clamped by the bar-shaped flanges on the outer side wall of the expansion sleeve, and the expansion bolt can be reliably fixed and can not become loosened; and in a dismounting process, the whole bolt main body is screwed out, and only the expansion sleeve is left in the wall, so that the whole expansion sleeve can not be exposed on the ground or the exterior of the wall and no potential safety hazard is caused.

Description

technical field [0001] The invention relates to screws, in particular to an expansion screw. Background technique [0002] Now the common expansion screw is fixed by using the wedge-shaped slope to promote the expansion to generate friction and grip force, so as to achieve the fixing effect. One end of the screw is threaded, the other end has a taper, and the outside is covered with an iron sheet (some are steel pipes). Half of the iron sheet cylinder (steel pipe) has a number of cuts. Put them into the hole made on the wall together, and then lock the nut, and the nut pushes the screw out. Pull, pull the taper into the iron cylinder, and the iron cylinder is expanded, so it is tightly fixed on the wall. It is generally used for fastening fences, awnings, air conditioners, etc. on cement, bricks and other materials. But its fixation is not very reliable. If the load has a large vibration, it may loosen. There are safety hazards for installing ceiling fans, etc., and when di...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B13/06F16B39/26
CPCF16B13/068F16B39/26
Inventor 何志元
Owner 何志元
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