Power tool

Abstract

The invention relates to a power tool. The power tool comprises a case, a motor, an output shaft, a transmission mechanism, a holder and a spindle, wherein the motor is arranged in the case and outputs rotation power; the output shaft is provided with a housing hole which is axially formed and is used for containing a working head; the transmission mechanism is arranged between the motor and the output shaft and can transmit the rotation power output by the motor to the output shaft; the holder is arranged in the case and comprises housing bins for housing a plurality of parallel working heads; the spindle can axially move between a working position which passes through the housing bins, is connected with one of the working heads in a matching manner and enables one of the working heads to be in the housing hole and a release position separated from one of the working heads; the power tool also comprises an operating part movably connected on the case; the operating part can move between the two positions; in a first position, the spindle is in the working position, and the operating part pushes against the case and covers a part of the holder; and in a second position, the spindle is in the release position, and the operating part is spaced with the case and is exposed out of a part of the holder.

Description

technical field [0001] The invention relates to a power tool, in particular to a gun drill type power tool which can realize the storage and quick replacement of working heads. Background technique [0002] Existing gun drill power tools generally include electric drills, electric screwdrivers and impact drills. [0003] An electric screwdriver is a commonly used electric tool for tightening screws to workpieces. When screws with different specifications need to be tightened during use, different working heads, that is, batch heads, should be replaced according to different screw specifications, that is, the originally installed working head should be removed, and then a working head with another structure should be installed. . In the occasions where the working head needs to be replaced frequently, it brings great inconvenience to the operator. On the one hand, it is cumbersome to replace the working head, and on the other hand, the removed working head is easily lost wh...

AI Technical Summary

Problems solved by technology

On the one hand, frequent short-time start-up of the motor is likely to shorten the life of the motor or damage it; on the other hand, the staggered angle between the sleeve and the cutter head is generally not very large. Generally, the handle of the cutter head is hexagonal. The rest of the staggered angle with the sleeve will not exceed 60 degrees, and even if the motor moves slightly, it will have to rotate several times. If the motor does not rotate properly, not only the cutter head will not be able to enter the sleeve accurately and smoothly, but it may also cause damage to the motor or the cutter. head damage

[0006] Moreover, when replacing the cutter head, it is necessary to return the cutter head to the runner cylinder first. In order to prevent the cutter head from being attracted by the magnet when the runner cylinder moves axially, the Chinese utility model patent CN201086280Y discloses that it passes The method of setting a fixed ring on the cutter head prevents the cutter head from being disengaged from the rotating drum, but such a cutter head needs to be specially ordered, so that the use of the tool is not universal

Moreover, the rotation of the cutter head directly through the spindle is relatively unstable, because the longer the length of the spindle, the greater the beating of the spindle, which brings some potential dangers to the user of the tool.

Furthermore, because the rotating drum needs to move axially and be separated from the main shaft, it is easy to enter dust and other sundries and cannot be cleaned

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