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Anti-skid expansion bolt

A technology of expansion bolts and bolts, applied in the direction of connecting components, pins, mechanical equipment, etc., can solve the problems of stress concentration, difficult positioning of bolts, skew and other problems

Inactive Publication Date: 2016-08-24
ZUNYI ZUNHONG SCREW FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The existing expansion bolts are composed of bolts, nuts, spring washers, flat washers and expansion cylinders. With this structure, when the expansion bolts are installed, the bolts are not easy to locate and tend to be skewed. The skewed bolts will cause stress concentration when they are stressed, and As the nut is tightened, the bolt rotates with the nut

Method used

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Embodiment Construction

[0015] The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, so as to define the protection scope of the present invention more clearly.

[0016] refer to figure 1 , figure 2 As shown, an anti-slip expansion bolt of the present invention includes a bolt 1, a nut 2, a spring washer 3, a flat washer 4 and an expansion cylinder 5. The expansion head 11 of the bolt 1 and the side gap 51 of the expansion cylinder 5 are provided with a limit The positioning convex strip 12 also includes a thin strip 52 arranged in the side gap 51. The limiting convex strip 12 is provided with a first curved portion 53 that bends toward the inside of the expansion cylinder 5. The position on the bolt 1 is opposite to the first curved portion 53. A protrusion 13 is provided, and by setting a limit protrus...

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Abstract

The invention discloses an anti-skid expansion bolt. The anti-skid expansion bolt includes a bolt body, a nut, a spring washer, a flat washer and an expansion drum; a expansion head of the bolt body and a side gap in the expansion drum are provided with limiting convex bars; thin bars are arranged in the side gap; the limiting convex bars are provided with first bending portions bending toward the inner part of the expansion drum; and positions facing the first bending portions, of the bolt body are provided with projections. During use, the bolt body is pulled up slightly and jacks up the first bending portions, and the thin bars are pushed out and supports the side wall of an installation hole; and the nut will not drive the bolt body to rotate during rotation.

Description

technical field [0001] The invention relates to the technical field of bolts, in particular to an anti-slip expansion bolt. Background technique [0002] The existing expansion bolts are composed of bolts, nuts, spring washers, flat washers and expansion cylinders. With this structure, when the expansion bolts are installed, the bolts are not easy to locate and tend to be skewed. The skewed bolts will cause stress concentration when they are stressed, and As the nut is tightened, the bolt rotates with the nut. Contents of the invention [0003] The invention mainly solves the technical problems existing in the prior art, thereby providing an anti-slip expansion bolt that can effectively prevent the bolt and the nut from rotating together. [0004] Above-mentioned technical problem of the present invention is mainly solved by following technical scheme: [0005] An anti-slip expansion bolt of the present invention includes bolts, nuts, spring washers, flat washers and an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16B13/06
Inventor 邓廷录
Owner ZUNYI ZUNHONG SCREW FACTORY