Patent ID: 9175745
Filing Date: 2015-11-03
Classification: B25B,B25F,F16H,Y10T

Abstract:
1. A handheld power tool, comprising: a motor; a gear housing; an annulus gear situated in the gear housing; a planetary gear drivable by the motor to drive a drive shaft in a first or second predefined direction of rotation, the planetary gear being situated in the gear housing and having at least one planetary stage to which the annulus gear is assigned; at least one sensor element situated in an area between the annulus gear and the gear housing in the longitudinal direction of the gear housing, the at least one sensor element being configured to detect a torque which acts in the first or the second direction of rotation and is transferable to the annulus gear via the drive shaft during operation of the handheld power tool; a cam disk situated radially fixedly and axially shiftably in the longitudinal direction between the annulus gear and the gear housing, wherein the annulus gear has in the longitudinal direction on its side facing the cam disk an axial extension that engages into an axial recess formed in the longitudinal direction of the cam disk on its side facing the annulus gear; and a control unit configured to at least reduce a motor speed generated by the motor during operation of the handheld power tool if the sensor element detects a torque acting in the first or the second direction of rotation, wherein the control unit is configured to receive and evaluate a signal transmission from the at least one sensor element, wherein based on the evaluation, the control signal is configured to at least reduce the motor speed generated by the motor if a transferred force exceeds a predefined threshold value during a predefined time period.