Self-locking bolt fastener

Abstract

The invention discloses a self-locking bolt fastener which comprises a screw rod. When the fastener is used, double effects of looseness prevention and convenient disassembly can be achieved at the same time. The screw rod is locked and is prevented from being loosened through structural cooperation among a locking cover, a fastening block and a base, and when the screw rod passes through a torsional spring, the torsion spring is extruded to generate expansion deformation, and thus, the screw rod can smoothly pass through the torsion spring conveniently. When the screw rod tends to rotate in the reverse direction, namely to be screwed out, the elastic force of the torsion spring enables the torsion spring to contract, the screw rod can be prevented from further rotating in the reverse direction, and therefore the self-locking effect is achieved. When the bolt fastener is detached, it is only needed to rotate the locking cover in the reverse direction, so that a flat and straight face of an internal thread is in extrusion contact with a short ejector rod, deformation potential energy of the spring is released, sliding locking on the fastening block is relieved, then a starting end of the torsional spring is extruded inwards, the torsional spring is expanded to relieve limitation on the screw rod, the screw rod can be screwed out rapidly, so that it is convenient to disassemble and assemble the fastener.

Description

technical field [0001] The invention relates to the technical field of mechanical fasteners, in particular to a self-locking bolt fastener. Background technique [0002] In the prior art, it is usually fixed by the cooperation of the screw and the nut. For example, in the field of water inlet valve technology, the water inlet valve is installed in the water inlet tank. When fixing the water inlet valve, it is usually on the water inlet pipe of the water inlet valve. The external thread is set, and then the nut is screwed on the water inlet pipe of the water inlet valve, thereby fixing the water inlet valve. [0003] In the bolt structure, the locking between the nut fastener and the screw rod is only achieved through the thread, which is prone to loosening after long-term use. The existing solution is often to add a self-locking structure to the nut fastener, but the existing self-locking Most of the lock structures are interference-fit locks, which are inconvenient when di...

AI Technical Summary

Problems solved by technology

[0003] In the bolt structure, the locking between the nut fastener and the screw rod is only achieved through the thread, which is prone to loosening after long-term use. The existing solution is often to add a self-locking structure to the nut fastener, but the existing self-locking Most of the lock structures are interference-fit locks, which are inconvenient when disassembling. There is room for improvement in how to achieve a balance between anti-loosening and disassembly convenience.

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