Patent ID: 8146676

Claim:
A multi-functional power tool comprising: a housing, a motor set in the housing, a main shaft driven through the rotation of the motor, a working shaft for connecting a working head when running, an active impact block, which can make axial motion with respect to the main shaft, is configured on the main shaft, a passive impact block which rotates with the working shaft and can alternatively make axial motion with respect to the working shaft is mounted on the working shaft, wherein the active impact block rotates to drive the passive impact block through the coordination of a first end tooth set on the active impact block and a second end tooth set on the passive impact block, and wherein the power tool further includes a function shifting button which can move between a first location and a second location to alternatively limit the axial motion of the passive impact block with respect to the working shaft to realize the shifting between a first function and a second function of the power tool.