Keyless drill chuck

Abstract

The invention provides a keyless drill chuck, belongs to the technical field of machinery, and solves the problem of easy looseness of a drill after the conventional keyless drill chuck is installed. The keyless drill chuck comprises a drill body and a front sleeve and a rear sleeve which are sleeved on the outer side of the drill body in turn and are barrel-shaped, wherein a cavity is formed among the front sleeve, the rear sleeve and the drill body; an annular spiral ring of which the upper part is provided with a groove is arranged in the cavity; the drill body is provided with three equant inclined holes; a clamping jaw of which the outer side is provided with an external thread is arranged in each inclined hole respectively; the spiral ring is in threaded connection with the clampingjaws; and an adjustment structure is arranged on the upper side of the spiral ring in the cavity and can drive the spiral ring to rotate when the front sleeve is rotated. The keyless drill chuck has the advantages of realizing bidirectional self locking and the like.

Description

technical field [0001] The invention belongs to the technical field of machinery, and relates to a hand-tight drill chuck, in particular to a hand-tight drill chuck capable of bidirectional locking. Background technique [0002] The hand-tight drill chuck is a daily tool, which is usually used to drill holes when installing or fixing objects. Existing hand-tight drill chucks generally consist of a drill body, jaws, nuts, bearings, rear sleeves, and front sleeves. The three jaws are respectively installed in the three equally divided oblique holes of the drill body, the nut is installed in the groove of the nut, the threads of the nut and the jaws form a thread transmission mechanism, the rear sleeve is connected with the nut, and the front sleeve is connected with the drill. The body is fixedly connected, and there is a threaded hole or a tapered hole at the rear of the drill body. During installation and use, the threaded hole at the rear of the drill body is connected wi...

AI Technical Summary

Problems solved by technology

[0003] However, this hand-tight drill chuck has the following disadvantages: the installed drill chuck will vibrate during work, and the drill tool will easily loosen during vibration or impact, which will affect work efficiency and poor safety; moreover, in order to achieve the drill tool For the purpose of clamping, a locking structure is installed in the drill chuck, so that it is not easy to form mass production because the structure is too complicated

Especially when drilling on cement slabs, due to strong vibrations, it is easy to loosen or further clamp the drill chuck, which will affect the drilling quality. In severe cases, the drill bit may be broken and cause danger.

Or the drill bit cannot be loosened after drilling, resulting in the inability to carry out follow-up work

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