Quick-change drill chuck

Abstract

The invention relates to a quick-change drill chuck. A plurality of through grooves which are communicated with central shaft holes are axially formed on the external side of the rear portion of a drill body; an annular groove which is provided with an annular spring ring is circumferentially arranged on the external side of the rear portion of the drill body; an oscillating rod which is in a fishhook shape is embedded in the through groove; a front end hook portion of the oscillating rod is outward grabbed on the annular spring ring from the through groove; an annular blocking groove is arranged in the middle of an output shaft of a main machine; a wedge block which is corresponding to the hook portion of the oscillating rod is arranged in a rear sleeve of the drill chuck; and a groove is arranged on the inner side of the wedge block. The rear sleeve moves backward relative to the drill body to press a transition inclined surface which is arranged on the external side of the rear portion of the oscillating rod; the oscillating rod moves towards an central axis of the drill body; projections on the internal side are pressed into the annular blocking groove of the output shaft of the main machine; and the drill chuck and the output shaft of the main machine are in fastening states. The rear sleeve moves forward to be inserted between the hook portion of the oscillating rod and the annular spring ring; the rear portion of the oscillating rod moves towards the external side; the drill body and the output shaft of the main machine are separated to be locked; and the rapid assembling and disassembling of the drill chuck are achieved. The quick-change drill chuck has the advantages of being reasonable in structure and convenient to operate and use.

Description

technical field [0001] The invention relates to a drill clamp in a hardware tool and a machine tool, in particular to a quick-change drill chuck matched with the working spindle of an electric drill or a machine tool. Background technique [0002] We know that existing drill chucks generally consist of a drill body, jaws, nuts, nut sleeves, bearings, retaining rings, front sleeves, and rear sleeves. The three jaws are respectively installed in the three equally divided oblique holes of the drill body, and the nuts are installed in the nut groove of the drill body. Or nut sleeve key connection, the back sleeve is fixedly connected with the drill body, and there is a threaded hole or a tapered hole at the rear of the drill body. During installation and use, the threaded hole or taper hole at the rear of the drill body is connected with the transmission shaft of the power tool, and when the transmission shaft rotates, the drill body is driven to drive the three claws and the c...

AI Technical Summary

Problems solved by technology

Based on the above reasons, when using these two connection methods between the drill chuck and the output shaft of the main engine, special tools must be used to disassemble and install, and there are many inconveniences in actual use.

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