Rotary type unfolding bolt fastener for single-side installation of component

Abstract

The invention discloses a rotary type unfolding bolt fastener for single-side installation of a component. The rotary type unfolding bolt fastener is provided with a screw rod and a sleeve cylinder, the end part of the screw rod is spaced with three convex rotary shafts at the intervals of 120 degrees, the sleeve cylinder is matched with the screw rod, and is spaced with three convex rotary shafts at the intervals of 120 degrees which are matched with rotary sheets, the tail section of the screw rod is provided with threads which are matched with a screw cap, the middle section of the screw rod is provided with a polished rod, and the front end of the screw rod is provided with a support head; the support head is spaced with the rotary shafts at the intervals of 120 degrees and the six rotary unfolding type rotary sheets in two layers, each layer is provided with three rotary sheets, and the rotary sheets are matched with the rotary shafts on the sleeve cylinder; when the rotary sheets are unfolded, the diameter of the support part of the part, protruding out of the sleeve cylinder, of each rotary sheet is greater than the outer diameter of the sleeve cylinder and the diameter of the tail part, so as to realize the support function; when the fastener is installed, the screwing of the screw cap is locked by an inner screw rod, so the six rotary sheets are unfolded, and the single-side tightening is realized. The rotary type unfolding bolt fastener has the advantages that the installation of a bolt is completed at one side, and the single-side operation of the bolt is completed.

Description

[0001] technical field [0002] The invention relates to a bolt fastener for unilateral installation in a workpiece, which belongs to the field of construction technology and mechanical assembly. [0003] Background technique [0004] As far as ordinary bolts composed of screws and nuts are commonly used at present, when performing fastening operations, it is necessary to insert the screw on one side and clamp the nut, and then tighten the nut with a tool on the other side. Installers work on both sides of the member at the same time. However, compared with the installation of more common open-section components, such commonly used bolts are inconvenient to use for components such as closed-section components and components that are inconvenient to access one side. For example, in steel pipe concrete structures, beam-column joints, etc., because the column sections are mostly closed sections, ordinary bolts cannot be operated on both sides, so ordinary methods cannot be in...

AI Technical Summary

Problems solved by technology

[0006]Technical problem: The present invention provides a rotary device for unilateral installation of components that can overcome the deficiency that existing bolts cannot be fastened on one side and improve the fastening effect of bolts Expandable Bolt Fasteners

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