Threaded sleeve provided with locking keys

Abstract

The invention provides a threaded sleeve provided with locking keys. The threaded sleeve provided with the locking keys is composed of a threaded sleeve body and the four locking keys, wherein the threaded sleeve body is provided with internal threads and external threads. The threaded sleeve body comprises a connecting portion and a locking portion which are integrally formed. The external threads are arranged on the connecting portion. The internal threads run through the connecting portion and the locking portion. Four dovetail-shaped key grooves are evenly and axially distributed on the outer circumference of the locking portion. The locking keys are inserted into the dovetail-shaped key grooves. A tool retracting groove is formed in the outer circumference direction between the connecting portion and the locking portion. The threaded sleeve provided with the locking keys is integrally formed and is in a stepped shaft shape, constant strength of the threaded sleeve is convenient to achieve, and limiting and installing are facilitated; when the threaded sleeve is screwed into an outer threaded hole, the threaded sleeve achieves locating through shaft shoulders of the locking portion, and because after the locking keys are inserted into the dovetail-shaped key grooves, the height, in the rail direction of the locking portion, of each locking key is larger than the radial depth of the corresponding dovetail-shaped key groove, circumferential fixation of the threaded sleeve can be achieved when the locking keys are inserted into the dovetail-shaped key grooves of the locking portion; and in this way, reliable connection between the threaded sleeve and a base body is guaranteed.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, in particular to a screw sleeve with locking keys. Background technique [0002] The screw insert is an insert developed to protect the threaded hole of non-ferrous metals. It is suitable for threaded connection, screwed into and fastened in the threaded hole of one of the connected parts to form a standard internal thread. Screw inserts have high hardness and good surface roughness, and are often used in environments requiring high-strength internal threads, with strong shock resistance and pull-out resistance. Installed in screw holes or nuts, it has the function of reducing uneven force on the thread teeth and anti-shock vibration, can improve the fatigue strength of the thread, reduce the wear and corrosion resistance of the thread, and can disperse the stress to protect the matrix thread and greatly extend the matrix service life. In addition, the screw sleeve can also be used as a ...

AI Technical Summary

Problems solved by technology

Ordinary screw sleeves are easy to loosen and fall off due to their lack of self-locking ability, and when the torque is large, the screw sleeves often rotate together with the screws, causing the screw sleeves to fall off from the threaded holes of the part base, resulting in damage to the threaded holes of the part base , which brings a lot of trouble to the maintenance, and even leads to the replacement of the part matrix

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