Locking device and bolt comprising same

Abstract

The invention discloses a locking device and a bolt comprising the same, and belongs to the technical field of locking of fasteners. The locking device comprises a threaded sleeve, at least one locking piece capable of being arranged in the threaded sleeve, an upper cover covering the threaded sleeve and packaging the locking pieces in the threaded sleeve, and a driver connected to the upper cover in a rotating mode, the driver is provided with a driving rod used for driving the locking pieces to stretch or contract, a coupling part is formed on the inner wall of the threaded sleeve, and the coupling part is used for clamping when the locking pieces are unfolded. The bolt comprises a screw and the locking device; the outer thread of the screw and the outer thread of the threaded sleeve are opposite in rotating direction, a nut is arranged at the top end of the screw, rotating grooves matched with the locking pieces in number are formed in the nut, the driving rod can penetrate through the rotating grooves; when the bolt is matched with the driving rod through the rotating grooves and the locking pieces are clamped with the coupling part, the locking device and the bolt are self-locked, and the bolt is prevented from loosening; the locking device and the bolt have the beneficial effects of high threaded connection reliability and good anti-loose effect.

Description

technical field [0001] The invention relates to the field of anti-loosening technology of fasteners, in particular to a locking device and a bolt provided with the locking device. Background technique [0002] Threaded connection is a widely used detachable fixed connection structure, which has the characteristics of simple structure, reliable connection, and convenient assembly and disassembly. Vibration and other effects make the threaded connection loose, and the loosening of fasteners will seriously threaten the safety of mechanical equipment; [0003] In the prior art, a variety of anti-loosening structures have been designed in the engineering field. The anti-loosening structure in the form of a washer has certain characteristics and is widely used. The principle is to increase the friction coefficient by changing the roughness of the end surface. The common ones are : flat washers, spring washers, sawtooth washers, etc., each of the above washers has its own shortcom...

AI Technical Summary

Problems solved by technology

[0002] Threaded connection is a widely used detachable fixed connection structure, which has the characteristics of simple structure, reliable connection, and convenient assembly and disassembly. Vibration and other effects make the threaded connection loose, and the loosening of fasteners will seriously threaten the safety of mechanical equipment;

[0003] In the prior art, a variety of anti-loosening structures have been designed in the engineering field. The anti-loosening structure in the form of a washer has certain characteristics and is widely used. The principle is to increase the friction coefficient by changing the roughness of the end surface. The common ones are : flat washers, spring washers, sawtooth washers, etc., each of the above washers has its own shortcomings, and related research has also found that flat washers reduce the looseness of the threaded connection, which is not an effective anti-loosening structure; the embedded behavior of the edge of the spring washers will be Scratches on the end face and the surface of the pressed part will cause damage; the serrated washer will damage the contact surface and may lose the anti-loosening effect due to wear;

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