Eccentric torsional shear damage type self-fixing single-side bolt fastener

Abstract

The invention relates to an eccentric torsional shear damage type self-fixing single-side bolt fastener. The eccentric torsional shear damage type self-fixing single-side bolt fastener comprises a bolt (2), a split type gasket (3) and a nut (6), wherein the bolt (2) is a single-side bolt. The fastener further comprises an eccentric gasket (5) and a fixing sleeve (7); an outer circle of the eccentric gasket (5) is polygonal, and an inner circle of the eccentric gasket (5) is circular; the diameter of the inner circle is more than the outside diameter of a bolt rod; a step type inserting pin (51) is arranged at the inner ring; a key slot (21) in match with the step type inserting pin (51) is formed in the bolt rod; the inner circle of the fixing sleeve (7) is polygonal and is in match with the outer circle of the eccentric gasket (5); an actuating arm (71) is arranged at the outer circle of the fixing sleeve (7). Compared with the prior art, the eccentric torsional shear damage type self-fixing single-side bolt fastener has the advantages that the bolt rod provided with the key slot is matched with the eccentric gasket, and meanwhile, the fixing sleeve is additionally arranged, so as to circumferentially clamp the fastener to the surrounding fixing end, and thus the circumference that the whole fastener slips while a wrench is used for pinching the nut can be prevented.

Description

technical field [0001] The invention relates to a bolt fastener that can be used for unilateral installation in the connection and fastening of structural parts, in particular to an eccentric torsional shear failure type self-fixing unilateral bolt fastener, which belongs to civil engineering and mechanical assembly technology field. 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, staff need to work on both sides of the components at the same time, and there is still no good implementation method for unilateral installation. 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...

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Problems solved by technology

[0005] However, this patent still needs to be improved in actual use. At the same time, the design idea is to design from the installation tool, which will inevitably lead to a more complicated overall device and inconvenient operation.

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