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A torsion shear type unilateral self-tightening bolt fastener

A technology for unilateral self-tightening bolts and fasteners, applied in the direction of threaded fasteners, screws, connecting components, etc., can solve the problem that bolts cannot be unilaterally tightened, and achieve excellent tightening effect, easy operation, The effect of improving the bearing capacity of nodes

Active Publication Date: 2017-04-05
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Technical problem to be solved: Aiming at the deficiencies of the prior art, the present invention provides a torsion-shear type unilateral self-tightening bolt fastener, which solves the inadequacy that common bolts in the prior art cannot perform unilateral fastening operations

Method used

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  • A torsion shear type unilateral self-tightening bolt fastener
  • A torsion shear type unilateral self-tightening bolt fastener
  • A torsion shear type unilateral self-tightening bolt fastener

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Embodiment Construction

[0024] The present invention will be further described below in conjunction with the accompanying drawings.

[0025] A new torsional shear high-strength unilateral self-tightening bolt fastener, including a torsional shear high-strength bolt 1 with a torx head 1-2, a nut 2, a second sleeve 3, a first sleeve 4 and a gasket 5;

[0026] Such as figure 1 As shown, one end of the torsional shear type high-strength bolt 1 has a bolt head 1-1 larger than the screw rod, and the other end has an easy-to-shear torx head 1-2, and there is a thread between the torx head 1-2 and the bolt head 1-1.

[0027] Such as figure 2 As shown, the second sleeve 3 is made of steel with a low yield point, and the outer side of one end of the second sleeve 3 is wedge-shaped, and the inner cavity of the second sleeve 3 is provided with an annular groove 3 in the middle -1, the yield strength of the second sleeve 3 is between 100MPa and 300MPa, the critical stress for plastic deformation at the annula...

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Abstract

The invention discloses a torsional shear type unilateral self-tightening bolt fastener comprising a torsional shear type high-strength bolt and a nut. One end of the torsional shear type high-strength bolt is a bolt head while the other end is a wabbler. A first sleeve, a second sleeve and a washer are sequentially arranged between the bolt head and the nut in a sleeving manner; yield strength of the material of the first sleeve is higher than that of the material of the second sleeve; at the position of the opposite end face of the first sleeve and the second sleeve, one end belonging to the second sleeve is located on the inner side of one end belonging to the first sleeve, and a weak part is arranged on the second sleeve. After being well assembled, the torsional shear type unilateral self-tightening bolt fastener penetrates into a reserved hole of a to-be-connected piece, a torsional shear wrench is used for screwing the bolt on the operable side, the weak part on the second sleeve is yielded firstly under the action of bilateral extrusion force to drive the periphery to form an expanded head so as to lock the to-be-connected piece, and specified friction-type bolt pretightening force can be achieved. The torsional shear type unilateral self-tightening bolt fastener meets design requirements of the steel structure on strength, and is simple in structure, low in cost, convenient to assemble and widely applicable to the fields such as civil and architectural engineering, mechanical engineering and the like.

Description

technical field [0001] The invention relates to the fields of civil engineering and mechanical connection and fastening, in particular to bolt fasteners for single-side installation and operation. Background technique [0002] At present, in the field of civil engineering and mechanical connection and fastening, the installation demand for the connection and fastening of structural parts is very large. As far as the current situation is concerned, the traditional and currently commonly used bolts are divided into two parts: a screw rod and a nut. It is necessary to insert the screw rod and clamp the nut on one side, and then tighten the nut with a tool on the other side. This makes it necessary for workers to work on both sides of the components when performing connection and fastening operations on the components. This connection and fastening method has simple structure, convenient operation and good bearing capacity, but it is only suitable for the connection of open cro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16B13/10
CPCF16B13/066F16B31/02
Inventor 范圣刚舒赣平刘飞
Owner SOUTHEAST UNIV
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