T-shaped unilateral bolt fastener

Abstract

The invention relates to a T-shaped unilateral bolt fastener. The fastener is used for fixing a connecting piece. The fastener comprises a bolt, a bolt sleeve, a large gasket and a large nut which areall sleeve the bolt; the bolt sleeve is arranged in a mounting hole; the head of the bolt, the large gasket and the large nut are arranged on two sides of the connecting piece so as to fasten and install the connecting piece. The T-shaped unilateral bolt fastener is characterized in that the bolt comprises a bolt head and a bolt rod which are connected with each other; the section of the mountinghole and the section of the bolt sleeve are the same as the section of the bolt head; and after the bolt head rotates by a set angle with the bolt rod as the axis, the sections of the rotated bolt head and the section of the bolt head at the original position are staggered. Compared with the prior art, the fastener has the advantages of easiness in mounting and high stability in fastening and thelike.

Description

technical field [0001] The invention relates to the technical fields of civil engineering and mechanical assembly, in particular to a T-shaped unilateral bolt fastener. Background technique [0002] At present, in the field of civil engineering and mechanical installation, there is a large demand for the installation of connection and fastening of structural parts. As far as bolts are commonly used at present, when performing connection and fastening operations on components, workers need to work on both sides of the components at the same time, that is, insert bolts with nuts on one side, and then use tools to screw large nuts on the other side. Tighten. This connection and fastening method has simple structure, convenient operation and good load bearing, but it is only suitable for open cross-section components. In some special occasions, such as connecting and fastening closed cross-section components or components that are inconvenient to operate on the other side , it...

AI Technical Summary

Problems solved by technology

This connection and fastening method has simple structure, convenient operation and good load bearing, but it is only suitable for open cross-section components. In some special occasions, such as connecting and fastening closed cross-section components or components that are inconvenient to operate on the other side , it is impossible to use this commonly used method of fastening bolts and large nuts

For example: in the steel pipe structure and steel pipe concrete structure, at the joint of the beam column, because the steel pipe column is a closed section, it cannot be operated on both sides, and can only be connected and installed on one side, so it cannot be connected and fastened by this commonly used bolt and large nut method for fastening installation

At present, there is no corresponding unilateral bolt product in the domestic market, and the published related patents either weaken the bolt shank too much or the stress points of the bolt head are too few. There are similar products in foreign markets, but the above-mentioned existing patents or products It is difficult to apply a large pre-tension force to the bolts during the installation stage to form a friction-type bolted joint, and its comprehensive mechanical properties under load are not ideal, which is greatly restricted in the application of seismic design of building structures

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