Locking device for bolt and nut

Abstract

The invention discloses a locking device for a bolt and a nut. The locking device comprises the bolt, the nut and a spring ring stop pin, wherein at least one axial groove is formed in the bolt, is parallel to a bolt shaft and penetrates through a part of a screw rod external thread surface; one end of the nut is provided with at least one pair of radial grooves perpendicular to the bolt shaft; the locking device is characterized in that after the bolt and the nut are pre-tightened by a fastening piece, the radial grooves are vertically aligned with the axial grooves, a locking pin hole is formed by the axial groove and the position between the radial groove and a flattened spring pad, the two ends of the spring ring stop pin are hooked into the locking pin hole and an opposite radial groove inserting hole correspondingly, by means of elasticity of a spring ring, the bolt with the axial grooves is tightly clamped through straight stop pins at the two ends of the spring ring, the bolt and the nut are locked, the spring ring in the middle of the spring ring stop pin is elastic and arc-shaped, and the two ends of the spring ring stop pin are inwards hooked and bent. The locking devicecan be suitable for fastening bolts with the same length and different thicknesses by the fastening piece, is good in universality and can be repeatedly disassembled, assembled and reused.

Description

technical field [0001] The present invention relates to fasteners, and more particularly to circlip stop pins with a portion passing through a threaded face, and to bolts with slots and nuts with slots or pin holes. Background technique [0002] China's invention patent application number 86105932 "triple safety bolt" discloses: a bolt with a radial spring top clip, and a nut that cooperates with the bolt and has a catch on the inner diameter, and the catch and clip cooperate with each other to make the nut not loose If it falls off, the nut is also provided with a groove so that the bolt and the nut are connected with an open pin to prevent the nut from getting loose. This kind of bolt and nut locking device, when the nut is screwed on the bolt and the pre-tightened position moves, it will re-drill the pin hole perpendicular to the bolt axis on the bolt, and it cannot be automatically adjusted with the different thicknesses of the fastened parts. The locking device of the ...

AI Technical Summary

Problems solved by technology

This kind of bolt and nut locking device, when the nut is screwed on the bolt and the pre-tightened position moves, it will re-drill the pin hole perpendicular to the bolt axis on the bolt, and it cannot be automatically adjusted with the different thicknesses of the fastened parts. The locking device of the bolt and nut at the height of the pin hole is not universal, which brings inconvenience to the use

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