Thread positioning locking mechanism and mounting method

Abstract

The invention belongs to an anti-loose technology of a threaded connection fastener, and provides a thread positioning locking mechanism and a mounting method. The thread positioning locking mechanism comprises a shaft with a threaded shaft section, a split nut (2), a bolt (3) and a stop block (4), wherein internal thread of the split nut is in interference fit with external thread of the shaft; an opening of the split nut (2) is in a run-through structure from an external diameter surface of the split nut to an inner hole of the split nut; a threaded hole and an unthreaded hole are formed on two sides of the opening of the split nut (2) respectively; the bolt (3) is matched with the threaded hole and the stop block (4); when the threaded section of the shaft is provided with the split nut (2), the opening of the split nut is properly stretched; after the split nut (2) is arranged in place, the bolt (3) is matched with the unthreaded hole and the threaded hole; and further, the split nut (2) on the threaded section of the shaft is fastened. According to the thread positioning locking mechanism and the mounting method, the thread connection fastening locking state is improved, and the anti-loose capacity is greatly improved.

Description

technical field [0001] The invention belongs to the anti-loosening structural design technology of fasteners connected by threads, and provides a thread positioning and locking mechanism and an installation method. Background technique [0002] The anti-loosening method of threaded connection can be divided into three categories: first, rely on the residual pre-tightening force of the fastener to prevent loosening, and the threaded connection fastener is required to have sufficient residual pre-tightening force; The amount of anti-loosening requires an appropriate amount of interference between the mating threads; three, rely on various special anti-loosening structures, these special anti-loosening structures include: double nuts, split nuts, slotted nuts, buckles Lock nuts, metal lock nuts, wedge thread lock nuts, nylon insert nuts, spring washers, toothed lock washers, snap washers, double snap rings, warped washers, conical lock washers, Cotter pin, steel wire series co...

AI Technical Summary

Problems solved by technology

For the double-nut structure, the realization of the fastening and locking of the threaded connection depends on the friction between the inner thread of the nut and the outer thread on the shaft caused by the joint force between the two nuts. The double-nut structure requires a relatively large The axial space, the fastening and locking force is relatively small, and the installation and positioning adjustment is time-consuming, so it is mostly used in situations where the structural size is small, the installation space is abundant, and the positioning accuracy and fastening and locking force are not required; For the split nut structure, the realization of the fastening and locking of the threaded connection is achieved by clamping the opening with the small screw installed on the split nut, thereby causing the connecting thread to interfere with the fastening force. Under normal circumstances, the deformation resistance of the split nut to tighten the opening is opposite to the required tightening force of the locking thread. The small screw that clamps the opening must not only overcome the deformation resistance of the split nut, but also provide the tightening force of the locking thread The solid force is also limited by the structural size of the split nut, which makes the threaded connection fastening and locking method between the positioning threaded fastener and the drive shaft very weak, and loosening failures often occur during work

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