A drill has a housing, a motor mounted in the housing having a drive spindle, an output spindle rotationally driven by the drive spindle via a torque clutch. The torque clutch slips when the torque across the torque clutch exceeds a predetermined value. The predetermined value of the torque at which the torque clutch starts to slip is adjustable via a torque threshold adjustment mechanism. A sleeve is rotatably mounted on the output spindle. The drive spindle drives the sleeve via a gear system at a same rate and direction as the output spindle so that there is no relative rotation between the sleeve and output spindle when the torque clutch is not slipping and at a different rate and/or direction so that there is relative rotation between the sleeve and output spindle when the torque clutch is slipping.

A drill includes a housing and a motor having a drive spindle. An output spindle is capable of being rotationally driven by the drive spindle via a torque clutch. The drill further includes atangential impact mechanism for superimposing tangential impacts onto the output spindle when activated. The tangential impact mechanism includes a sleeve rotatably mounted on the output spindle, and an anvil rotatably mounted onto the output spindle. The output spindle and the sleeve are rotationally driven by a planetary gear system comprising a ring gear, a sun gear and a planetary gear which is drivingly connected between the ring gear and sun gear.

A drill includes a housing and a motor having a drive spindle. An output spindle is capable of being rotationally driven by the drive spindle via a torque clutch. The drill further includes a tangential impact mechanism for superimposing tangential impacts onto the output spindle when activated. The tangential impact mechanism includes a sleeve rotatably mounted on the output spindle, and an anvil rotatably mounted onto the output spindle. The sleeve is rotationally driven by the drive spindle via a gear system at a first rotational rate when the torque clutch is not slipping and at a second rotational rate when the torque clutch is slipping.

A rotary hammer includes a spindle that rotates, a reciprocation mechanism including a piston within the spindle and operable to create a variable pressure air spring within the spindle, an anvil within the spindle for reciprocation in response to the pressure of the air spring, the anvil imparting axial impacts to a tool bit, a port in one of the spindle or the piston, and a closure movable relative to the port between a first position, in which the closure member seals the port and an interior volume of the spindle between the piston the anvil is sealed to develop the variable pressure air spring, and a second position, in which the closure member is spaced apart from the port and the interior volume of the spindle between the piston and the anvil is unsealed and unable to develop the variable pressure air spring.

A tool including a motor, a transmission including a ring gear including a face having a linear portion and ramps extending a fixed axial distance, a spindle, a setting collar, and a clutch coupled to the transmission. The collar is rotatable between predetermined angular positions including a first position corresponding to a non-torque-limited first operation mode and a plurality of second positions corresponding to different torque output settings of a torque-limited second operation mode. The clutch includes a follower positioned between a clutch washer and the face, and a clutch sleeve coupled to the collar that is movable a variable axial distance from the clutch washer dependent on the collar position. In the first angular position corresponding to the first mode, the fixed axial distance is greater than the variable axial distance, and in the second angular positions, the variable axial distance is greater than the fixed axial distance.

A rotary power tool includes a housing having a motor housing portion and a handle portion extending therefrom. An electric motor is positioned within the motor housing portion. The rotary power tool further includes a trigger switch configured to activate and deactivate the motor. The rotary power tool further includes a non-contact speed selector switch positioned in the housing. The non-contact speed selector switch is configured to adjust a rotational speed of the motor. The non-contact speed selector switch is separate from the trigger switch.

A rotary tool includes a motor, a final output shaft, a housing, a detecting mechanism, an interrupting mechanism and a solenoid. The motor includes a motor body and a motor shaft. The final output shaft is configured to be rotationally driven by torque transmitted from the motor shaft. The housing houses the motor and the final output shaft. The detecting mechanism is configured to detect a motion state of the housing. The interrupting mechanism is provided on a transmission path of the torque from the motor shaft to the final output shaft, and configured to interrupt transmission of the torque. The solenoid includes a linearly movable actuation part and is configured to mechanically actuate the interrupting mechanism via the actuation part based on the motion state of the housing detected by the detecting mechanism.

A clutch mechanism for use in a rotary power tool having a motor comprises an input member to which torque from the motor is transferred and an output member movable between a first position in which the output member is engaged with the input member for co-rotation therewith, and a second position in which the output member is disengaged from the input member. The clutch mechanism further comprises a biasing member biasing the output member into the first position and an electromagnet which, when energized, moves the output member from the first position to the second position.

Vibrations resulting from a reciprocating piston and vibrations resulting from a rotating crank shaft are reduced effectively. A housing for a hammer drill accommodates, at a position at which a cap closes a supply port, a counterweight movable in cooperation with a crank mechanism to reduce vibrations in a striking axis direction resulting from a reciprocating piston, and a second counterweight rotatable in cooperation with the crank mechanism to reduce vibrations in a rotational direction resulting from a crank shaft.

A control method for a power tool for rotary tools comprises rotating a tool holder continuously about a working axis by a rotary drive. A rotary movement of a handle about the working axis is sensed by a motion sensor. A first angle of rotation of the handle is estimated by a first motion estimator, wherein rotary movements beneath a limit value are discounted. A second angle of rotation of the handle is estimated by a second motion estimator, wherein rotary movements beneath the limit value are taken into account. A measure for reducing the torque output of the rotary drive is activated when the first angle of rotation exceeds a first triggering threshold (A1), and when the second angle of rotation exceeds a second triggering threshold (A2) and at the same time a power output of the rotary drive exceeds a power threshold (L).