power tool

Abstract

The invention discloses a power tool. The power tool comprises a shell, a motor, a planet gear reducing mechanism, a power output mechanism, a first function switching mechanism, a first impact switching mechanism, a second function switching mechanism and a second impact switching mechanism, wherein the first function switching mechanism is used for selectively setting the power tool in one of a drilling function, an impact wrench function and a screwdriver function; the second function switching mechanism is used for selectively setting the power tool in an impact drill starting or stopping function; the second impact switching mechanism comprises a second clutch part, static end teeth and movable end teeth; the static end teeth are fixedly arranged in the shell; the movable end teeth are arranged on a working shaft in a sleeving way; the movable end teeth can move axially under the driving action of the working shaft so as to be meshed with the static end teeth; the second clutch part is driven by the second function switching mechanism to cut off or allow the meshed transmission connection between the static end teeth and the movable end teeth. According to the power tool, the impact drill function is integrated on the basis of the conventional four-function power tool, and the torque range of the screwdriver function is expanded, so that the application performance is improved greatly.

Description

technical field [0001] The invention relates to a power tool, in particular to a multifunctional power tool capable of integrating four functions of an electric drill, an impact wrench, an impact drill and a screwdriver. Background technique [0002] Electric tools are widely used in many fields. In recent years, DC electric tools have gradually become the mainstream due to their portability and perfect functions. Among DC electric tools, electric drills, impact wrenches, impact drills, and screwdrivers are the most commonly used. Four kinds. [0003] The electric drill mainly drives the input end through the motor, and directly outputs the torque from the output end through the variable speed transmission mechanism. It can generally be used for conventional drilling on objects that are not particularly hard, such as wood, composite boards, etc. Because the impact wrench continuously beats the driven impact block with a certain period of time through the active impact block...

AI Technical Summary

Problems solved by technology

And in U.S. application US20080035360, disclose a kind of electric tool that integrates three kinds of functions of electric drill, impact wrench, screwdriver, although have its obvious advantage, also have a shortcoming, promptly the screwdriver function is set in the high speed The torque span of the gear position is relatively small, that is, the screwdriver cannot achieve "the torque of the low gear is low enough, and the torque of the high gear is high enough", which cannot achieve the best use effect for the user.

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