A control method for a power tool for rotary tools provides the following: A tool holder is rotated continuously in a forward direction about a working axis by a rotary drive when an operating switch is actuated. The continuous rotation in the forward direction is interrupted by a protective process when a protective device senses blocking of the tool holder. During the protective process, one or more cycles are executed, in which the rotary drive is actuated successively in accordance with an unimpeded rotary movement in a reverse direction and in accordance with an unimpeded rotary movement in the forward direction. The rotary drive is supplied with a first amount of energy for the rotary movement in the reverse direction and with a second amount of energy for the rotary movement in the forward direction. The first amount of energy is smaller than the second amount of energy.

An impact tool includes a motor, a driving mechanism, and a vibration sensor. The driving mechanism is configured to perform a hammering operation of linearly driving a tool accessory along an impact-axis by power of the motor. The impact-axis extends in a front-rear direction of the impact tool. The vibration sensor is configured to detect vibrations. The vibration sensor is disposed such that the vibration sensor is capable of detecting vibrations of a first frequency among vibrations caused in the impact tool, and such that transmission of vibrations of a second frequency to the vibration sensor is suppressed. The vibrations of the first frequency result from the hammering operation. The second frequency is different from the first frequency.

A pneumatic hammer has a conversion mechanism with a rotatable input member coupled to the motor and adapted to convert a rotational movement of the input member into a reciprocating movement of an output member. The input member is formed as a first carrier which supports a first planet gear. A first sun gear is coaxially arranged with the first carrier, and is rotatingly driven by the drive motor. A first ring gear is movable parallel to the first axis of rotation between a first position and a second position. A second gear is rotatable around a second axis of rotation parallel to the first axis of rotation. The second gear meshingly engages with the first ring gear when the first ring gear is in the second position, and is disengaged from the first ring gear when the first ring gear is in the first position.

A hand-power tool includes at least one oscillation-damping device that has at least one damping spring, a damping mass, and a mechanism housing. The oscillation-damping device has at least two retaining parts that at least partly enclose the damping mass.

The hand-held power tool has a tool socket, a motor and a pneumatic striking mechanism. The striking mechanism has an exciter driven by the motor along a working axis, a striker coupled to the exciter via an air cushion, and an intermediate striker arranged between the striker and the tool socket in the striking direction. The striking mechanism also has a guide in which the intermediate striker is guided. The guide has a first sliding surface that guides a first section of the intermediate striker, and a second sliding surface that is arranged offset relative to the first sliding surface in the striking direction and that guides a second section of the intermediate striker. A radial dimension of the first section of the intermediate striker is greater than a radial dimension of the second section of the intermediate striker.

A portable power tool has an exciter piston guided along a movement axis in a guide tube and a striker coupled to the exciter piston. A connecting rod is fastened to a piston pin in the exciter piston and to an electric motor. A bearing for supporting the piston pin is formed by a piston head of the exciter piston and a closure plate inserted into the exciter piston. A rotary closure is formed by a groove, extending in a direction of rotation about the movement axis, in the piston wall and by a radially protruding fin on the closure plate. A detent for locking the fin counter to the direction of rotation is pivotable in the radial direction between a locking position and a releasing position. The detent is deflected beyond the external dimensions of the piston wall in the radial direction in the releasing position.

An electrical hammer (100) comprises a main housing (101), a hand grip (500) connected to the main housing (101) via a compression coil spring (321). In the electrical hammer (100), a hammer bit (119) is driven by a first motion converting mechanism (120) and thereby a hammering operation is performed. During the hammering operation, the hand grip (500) is moved against the main housing (101) in a state that biasing force of the compression coil spring (321) is applied on the hand grip (500). Further, the electrical hammer (100) comprises a second motion converting mechanism (220) which drives a counterweight (231).

Percussion unit, especially for a rotary hammer and/or percussion hammer, comprising a control unit which is designed for open-loop and/or closed loop control of a pneumatic percussion mechanism, and at least one operating condition sensor unit. According to the disclosure, the control unit is designed to detect at least one percussion mechanism parameter depending on measurement values of the operating condition sensor unit.

A power tool includes a motor, a housing, a battery mounting part, and a battery protection part. The battery mounting part is provided to the housing on an opposite side from a working axis across the motor in an extending direction of a rotation axis of the motor. The battery mounting part is configured such that one end portion of at least one battery is mounted to the battery mounting part and an opposite end portion of the at least one battery in the extending direction of the rotation axis is exposed from the housing. The battery protection part is provided to an outer surface portion of the housing and configured to protect at least one corner region of the opposite end portion of the at least one battery against external force when the one end portion is mounted to the battery mounting part.

The representative impact tool has a motor, a driving mechanism, a body housing and a handle, and part of the motor and part of the handle are disposed on an axis of a tool accessory. The impact tool has an outer housing that is disposed to cover the outside of the body housing and connected to the body housing via an elastic element so as to be allowed to move with respect to the body housing in an axial direction of the tool accessory, and the handle is integrally connected to the outer housing. The body housing has an exposed region in which at least part of a region of the body housing corresponding to at least one of the motor and the driving mechanism, is not covered by the outer housing.