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Expansion screw

An expansion screw and screw technology, applied in the direction of screws, pins, nuts, etc., can solve the problems of cumbersome working steps, deformation of the screw 11, inability to screw the nut 14, etc., and achieve simplified operation steps, reliable use, and avoid thread damage Effect

Inactive Publication Date: 2010-12-08
FAITHFUL ENG PRODS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] 1. It is necessary to drill the hole first, and then drive the expansion screw 10 into the hole 16. The working steps are relatively cumbersome
[0006] 2. If the depth of the drilled hole 16 is insufficient, the positioning sleeve 12 of the expansion screw 10 cannot be completely buried in the hole 16
Then the expansion screw 10 cannot be used and must be pulled out
And it is not easy to pull out the expansion screw 10
[0007] 3. During the operation of driving the expansion screw 10 into the hole 16, sometimes the upper end of the screw rod 11 will be deformed due to the impact, and cannot be screwed with the nut 14

Method used

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Embodiment Construction

[0020] In view of the foregoing shortcomings of the prior art, the applicant invented an expansion screw that can simplify the application steps. The invention does not need to be driven into the hole in use, but can avoid the situation that the insertion depth is insufficient and the screw is broken, and the operation is easier and more accurate. Examples are now listed in conjunction with the drawings to detail the structural features and use effects of the present invention.

[0021] See figure 2 , image 3 . The expansion screw disclosed in the present invention is an expansion screw 1 with high load-bearing capacity, which is mainly used for concrete floors or walls. The expansion screw 1 includes a screw device 20, a positioning sleeve 30, a nut device 40, and an anti-return pin 50. The positioning sleeve 30 is sleeved on the outside of the screw device 20. The nut device 40 is screwed on the screw device 20. The anti-return pin 50 is provided on the screw device 20 to...

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PUM

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Abstract

The invention discloses an expansion screw capable of being fixed on concrete surface or wall surface, which comprises a screw rod device, a locating sleeve, a nut device and a retaining pin, wherein the locating sleeve is sleeved outside the screw rod device; the nut device is screwed on the screw rod device and is positioned on the upper end of the locating sleeve; the retaining pin is arranged on the screw rod to prevent the nut device from falling off; the screw rod device comprises a rod body and a conical head integrated with the rod body; and the lower end of the conical head is connected with a drill to ensure the expansion screw to have the function of drilling.

Description

Technical field [0001] The invention relates to a screw, in particular to an expansion screw, which has a drill bit that can directly drill holes on the concrete floor or wall surface, and can complete the operation of embedding in the hole when the drilling is completed, so as to simplify the use steps. Improve the accuracy of operation. Background technique [0002] To fix the object on the concrete floor or wall surface, expansion screw 10 must be used, such as figure 1 Shown. The expansion screw 10 includes a screw 11, a positioning sleeve 12, a washer 13, and a nut 14. The lower end of the screw 11 is connected to a cone 15, and the lower end of the cone 15 is enlarged. When the expansion screw 10 is used, it is inserted into a pre-drilled hole 16 and the positioning sleeve 12 is completely inserted into the hole 16. By rotating the nut 14, the screw 11 is forced to move out of the hole 16. Then, the cone 15 at the lower end of the screw 11 will squeeze into the position...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B13/06F16B13/10F16B25/10F16B23/00F16B39/04
Inventor 刘明渊
Owner FAITHFUL ENG PRODS
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