Quick-change dual-purpose drill chuck and hammer drill using it

Abstract

The invention provides a dual-purpose drill chuck and an electric hammer drill using the same. The interior of the dual-purpose drill chuck is hollow; the front part is a hand-tight or wrench type drill bit holder; the rear part extends, and the inner wall has a key that matches the opening groove of the electric hammer drill bit, and a cylindrical pin that penetrates the drill chuck wall radially; The rear end is a connecting part that is socketed with the rotating sleeve of the electric hammer drill. The corresponding part of the connecting part relative to the rotating sleeve can be a receiving part or an inserting part. The connecting part has a fixed connecting device; the fixed connecting device is a steel ball. There are two steel ball holes on the outer tube wall at the socket joint between the chuck and the rotating sleeve, and there are circular grooves for fixing the steel balls at the corresponding positions on the inner tube wall. The steel balls It passes through the two steel ball holes and enters into the annular groove. The electric hammer drill using the above-mentioned dual-purpose drill chuck is a new type of electric hammer drill with convenient and comfortable operation, quick installation and removal of the drill chuck, high drilling precision, and high processing efficiency.

Description

technical field [0001] The invention relates to the technical field of electric hammer drills, in particular to a rapidly replaceable dual-purpose drill chuck and an electric hammer drill using the same. Background technique [0002] Electric hammer drills commonly used now, refer to figure 1 , Figure 1A and Figure 1B , the drill bit 21 with electric hammer function is clamped on the electric hammer to realize the concrete drilling operation. If it is necessary to drill steel or wood, refer to figure 2 , Figure 2A and Figure 2B , it is necessary to connect the drill chuck 101 with the connecting rod 102 and then assemble it on the electric hammer, and then clamp the twist drill bit 100 or other drill bits on the drill chuck 101 to realize the drilling operation, that is, to perform the electric drill function; when the user When replacing the electric hammer function and the electric drill function, the drill chuck 101 needs to be assembled and disassembled. In act...

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of existing electric hammers such as inconvenient operation, low drilling accuracy, low processing efficiency, cumbersome replacement of worn rotating sleeves and troublesome maintenance when realizing the electric drill function, and at the same time overcome the shortcomings of the Chinese invention patent application technology No. CN1149850A , the present invention provides a dual-purpose drill chuck and an electric hammer using it that are easy to operate, have high drilling precision and high processing efficiency, and do not need to disassemble the whole machine to replace the rotating sleeve after the key is worn out, and are easy to maintain. to drill

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