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Large-size expansion bolt

An expansion bolt, large-size technology, applied in the direction of connecting components, pins, mechanical equipment, etc., can solve the problem of low strength, and achieve the effect of improving friction, improving stability, and high practical value

Active Publication Date: 2016-07-20
湖北再洪标准件股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, when connecting large heavy objects, it still has the problem that the strength is not high or a large number of expansion bolts must be used.

Method used

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  • Large-size expansion bolt
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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0060] Such as figure 1 and figure 2 and image 3 and Figure 4 As shown, the large-size expansion bolt includes a rod body 1 and a sleeve 2, the inner end of the rod body 1 has a nut 1a connected therewith, the outer end of the rod body 1 is detachably connected with a boss 3, and the sleeve sleeve 2 is set on the rod body 1 and the sleeve 2 is limited between the nut 1a and the protruding head 3. The outer side of the sleeve 2 has a through hole 2a, and the sleeve 2 has a hole 2a extending from its outer end to the through hole. The gap at the hole 2a, the above-mentioned through hole 2a and the gap form an expansion part and there are several expansion parts on the sleeve 2a, a petal-shaped expansion petal 2b is formed between the above-mentioned two adjacent gaps, and the expansion petal 2b It has a reinforced structure, and the outside of the protruding head 3 has a contact portion 3a that can increase friction.

[0061] The through hole 2 a is in the shape of a stri...

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PUM

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Abstract

The invention provides a large-size expansion bolt and belongs to the technical field of machines. The large-size expansion bolt solves the problem that in the prior art, strength is not high. The large-size expansion bolt comprises a rod body and a sleeve, and the inner end of the rod body is provided with a nut connected with the rod body into a whole. The outer end of the rod body is detachably connected with a convex head, the rod body is sleeved with the sleeve, and the sleeve is limited between the nut and the convex head. The outer side of the sleeve is provided with through holes, and the sleeve is provided with notches extending from the outer end of the sleeve to the through holes. Each through hole and the corresponding notch form an expansion part, the sleeve is provided with a plurality of the expansion parts, a flap-shaped expansion flap is formed between the two adjacent notches, the expansion flap is provided with a reinforcing structure, and the outer side of the convex head is provided with a contact part capable of increasing friction force. The large-size expansion bolt is compact in structure and high in strength.

Description

technical field [0001] The invention belongs to the technical field of machinery and relates to a large-size expansion bolt. Background technique [0002] Expansion bolt is a special threaded connection used to fix pipeline supports / hangers / brackets or equipment on walls, floors, and columns. When in use, you must first use an impact electric drill (hammer) to drill holes of corresponding size on the fixed body, then put the bolts and expansion tubes into the holes, and tighten the nuts to make the connection between the bolts, expansion tubes, mounting parts and the fixed body Tighten and become one. [0003] It will expand after tightening. There is a big head at the end of the bolt, and a round pipe slightly larger than the diameter of the bolt is placed outside the bolt. There are several openings in the tail part. When the bolt is tightened, the tail of the big head is brought into the open pipe. The pipe is punched big to achieve the purpose of expansion, and then th...

Claims

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Application Information

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IPC IPC(8): F16B13/06
CPCF16B13/068
Inventor 冯俊
Owner 湖北再洪标准件股份有限公司