Anti-loose screw fastener

Abstract

The invention provides an anti-loose screw fastener. The anti-loose screw fastener comprises a screw, a ratchet wheel and a check ring. The ratchet wheel is fixed to the screw. The check ring is fixedto the end face of a workpiece and is aligned with a threaded hole of the working table. The sidewall of the check ring is provided with a locking slot around the axis of the check ring. A locking pawl matched with the ratchet wheel is arranged in the locking slot. The locking pawl is rotatably connected with the check ring. An elastic part abutting against the locking pawl and rotating inwards to extend into a center hole of the check ring is mounted between the locking pawl and the locking slot. When the screw is screwed in the positive direction and is screwed into the threaded hole of theworkpiece, the ratchet wheel goes into the check ring, the locking pawl slides on the tooth back of the ratchet wheel. When the screw is screwed in the reverse direction, the ratchet wheel and the locking pawl are clamped tightly so that the screw cannot be screwed out from the threaded hole. The locking pawl is pushed outwards and can retreat from a tooth groove of the ratchet wheel, and then the screw can be rotated reversely to be screwed out from the threaded hole. The anti-loose screw fastener is simple in structure and good in anti-loose effect.

Description

technical field [0001] The invention relates to the technical field of fasteners, in particular to an anti-loosening screw fastener. Background technique [0002] Bolts and nuts are the most commonly used fasteners, which are widely used in various fields. Bolts and nuts are connected by threads, and the self-locking ability between them comes from the cooperation of internal and external threads. [0003] In a relatively stable place, the fit between the bolt and the nut is relatively fixed and will not easily loosen. For the equipment required for assembly and the use of other special environments, the self-locking ability of the bolt thread connection is not enough to maintain its own stability. In daily life, it is more common to use bolts between many parts of the vehicle on large vehicles. Connect and fix (because the application position is relatively fixed and the specifications of the bolts are uniform, so these bolt fasteners can be mass-produced). During the driv...

AI Technical Summary

Problems solved by technology

[0003] In a relatively stable place, the fit between the bolt and the nut is relatively fixed and will not easily loosen. For the equipment required for assembly and the use of other special environments, the self-locking ability of the bolt thread connection is not enough to maintain its own stability. In daily life, it is more common to use bolts between many parts of the vehicle on large vehicles. Connect and fix (because the application position is relatively fixed and the specifications of the bolts are uniform, so these bolt fasteners can be mass-produced). During the driving of a large vehicle, the ground bumps will cause the body to shake. In the long run, the gap between the bolt and the nut The connection of the fasteners will be loose, and the looseness of the fasteners will directly affect the normal operation of the relevant parts of the vehicle, which will easily lead to failures

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