Abstract: A power tool has a tool holder, an electric motor, a handle, and a main switch for switching on the electric motor. The power tool executes the following control method. The main switch is scanned to see whether it has been actuated. A start inhibitor transmits a blocking signal to a motor controller if the main switch is actuated before the power tool has been connected to the power supply. An activator receives signals from a control unit separate from the electric power tool, compares the received signals with a predefined signature and transmits a release signal to the motor controller if the received signal corresponds to the predefined signature. The motor controller switches on the electric motor in response to actuation of the main switch if the start inhibitor is not transmitting a blocking signal or the activator is transmitting a release signal.

Abstract: A control method for a percussive hand-held power tool (1) includes the steps: detecting a switching state of an operating button (12), detecting a temperature T using a temperature sensor (22), activating an electropneumatic striking mechanism (5) in response to an actuation of the operating button (12), an exciter (13) of the electropneumatic striking mechanism (5) being moved forward and backward along a working axis (3) at a repetition rate R, whereby a striker (14) coupled to the exciter (13) via a pneumatic chamber (16) is also moved. If the temperature T is greater than a limiting temperature Tc, the repetition rate R is continuously increased from idle up to a setpoint value (21). A duration until reaching the setpoint value (21) is less than 10 cycles. If the temperature T is less than the limiting temperature Tc, a duration until reaching the setpoint value (21) is greater than 200 cycles.

Abstract: The control method for a hammer drill (1) provides the following steps. During basic operation, the motor (5) rotates at an operating speed for the drilling operation with chiseling action in order to rotationally drive the tool holder (2) and to drive the hammer mechanism (6) with a nominal striking power. The torque coupling (21) is monitored with the aid of a sensor (26). If a disengagement of the torque coupling (21) occurs, the striking power of the hammer mechanism (6) is reduced to below 10% of the nominal striking power during a disengagement of the torque coupling (21), and the torque coupling (21) is driven. When the disengagement of the torque coupling (21) ends, the striking power of the hammer mechanism (6) is increased to the nominal striking power and the torque coupling (21) is driven at the operating speed for the drilling operation with chiseling action.

Abstract: A portable power tool is disclosed. The tool has a tool holder, a motor, a switchable gear stage, and a slider. The gear stage has a gear element movable in a switching direction with a toothing, which in a first gear position is engaged with a corresponding toothing and in a second gear position is disengaged. The slider is displaceable between first and second switch positions where the first switch position is allocated to the first gear position and the second switch position is allocated to the second gear position. A coupling device has a carriage movable in the switching direction and a catch. The carriage is connected to the gear element and the catch is latched in the first and second gear positions. A spring element has springy first and second sections. The slider has a finger that is arranged along the switching axis between the sections.

Abstract: A power tool has a tool holder, an electric motor, a handle, and a main switch for switching on the electric motor. The power tool executes the following control method. The main switch is scanned to see whether it has been actuated. A start inhibitor transmits a blocking signal to a motor controller if the main switch is actuated before the power tool has been connected to the power supply. An activator receives signals from a control unit separate from the electric power tool, compares the received signals with a predefined signature and transmits a release signal to the motor controller if the received signal corresponds to the predefined signature. The motor controller switches on the electric motor in response to actuation of the main switch if the start inhibitor is not transmitting a blocking signal or the activator is transmitting a release signal.

Abstract: A hand-held power tool (1) includes a tool holder (2) for holding a tool on a working axis (11) and a motor (5) for rotationally driving the tool holder (2) about the working axis (11). The motor (5) is situated in a power-tool housing (16) and a handle (9) is fastened on the power-tool housing (16) for guiding the hand-held power tool (1) during operation. A rotary motion sensor (15) detects a rotary motion of the power-tool housing (16) about the working axis (11). A monitor (19) ascertains a holding force based on an amplitude of the rotary motion in a frequency range between 0.4 Hz and 4 Hz. A safety device (13) reduces a torque output to the tool holder (2) when the detected rotary motion exceeds a limiting value, the limiting value being set as a function of the holding force.

Abstract: The torque coupling has a shaft, a hollow shaft and a plurality of levers. The bearings of the levers are non-rotatably connected to the shaft and the levers are spring-loaded so as to be pressed against the hollow shaft. The levers are bent from a steel strip.

Abstract: The control method for a hammer drill (1) provides the following steps. During basic operation, the motor (5) rotates at an operating speed for the drilling operation with chiseling action in order to rotationally drive the tool holder (2) and to drive the hammer mechanism (6) with a nominal striking power. The torque coupling (21) is monitored with the aid of a sensor (26). If a disengagement of the torque coupling (21) occurs, the striking power of the hammer mechanism (6) is reduced to below 10% of the nominal striking power during a disengagement of the torque coupling (21), and the torque coupling (21) is driven. When the disengagement of the torque coupling (21) ends, the striking power of the hammer mechanism (6) is increased to the nominal striking power and the torque coupling (21) is driven at the operating speed for the drilling operation with chiseling action.

Abstract: A machine tool is disclosed. The machine tool has a tool receptacle for receiving a tool on a working axis, a housing, and a striking mechanism. An impact stop is provided for a beater or an intermediate beater. An impact absorber has two polymer-based absorber rings that are offset axially to one another and are disposed so that they overlap radially and has two iron-based disks disposed axially between the absorber rings.

Abstract: A handheld power tool has a switchable gear component actuatable by a selector switch. The gear component moves from a first operating position into a second operating position. The selector switch has a first switching position associated with the first operating position and a second switching position associated with the second operating position, and movable so that intermediate positions are assumed. A traveling coupling between the selector switch and the gear component has a spring exerting force onto the gear component in the first direction. A locking bolt is coupled to the selector switch in a positively driven manner. In the intermediate positions, the locking bolt is moved into a blocking bolt position blocking movement of the gear component out of the first operating position into the second operating position. When the selector switch is in the second switching position, the locking bolt is in a releasing bolt position.

Abstract: A hand-held power tool 1 has a tool socket 2 to hold a tool 4 on a working axis 11, a motor 5 and a pneumatic striking mechanism 6. A driven shaft 7 is coupled to the tool socket 2 in order to rotate the tool around the working axis 11. A slip clutch 24 is arranged in the drive train between the motor 5 and the driven shaft 7. The slip clutch 24 has a disk 25 on the drive side and a disk 26 on the driven side. On a driving ring surface 28 that is in contact with the disk 26 on the driven side, the disk 25 on the drive side has first sectors 33 that have a high friction value as well as second sectors 34 that have a low friction value. On the driven ring surface 29 that is in contact with the driving ring surface 28, the disk 26 on the driven side has third sectors 35 that have a high friction value as well as fourth sectors 36 that have a low friction value.

Abstract: A portable power tool is disclosed. The tool has a tool holder, a motor, a switchable gear stage, and a slider. The gear stage has a gear element movable in a switching direction with a toothing, which in a first gear position is engaged with a corresponding toothing and in a second gear position is disengaged. The slider is displaceable between first and second switch positions where the first switch position is allocated to the first gear position and the second switch position is allocated to the second gear position. A coupling device has a carriage movable in the switching direction and a catch. The carriage is connected to the gear element and the catch is latched in the first and second gear positions. A spring element has springy first and second sections. The slider has a finger that is arranged along the switching axis between the sections.

Abstract: A side-handle for a hand-held power tool includes a gripping element and a fastener for fastening the side handle to the hand-held power tool. The gripping element and the fastening means can be pivoted with respect to each other around a rotational axis. This rotational axis runs perpendicular to a longitudinal axis of the gripping element and runs through an end area of the gripping element facing away from the fastener.

Abstract: A machine tool is disclosed. The machine tool has a tool receptacle for receiving a tool on a working axis, a housing, and a striking mechanism. An impact stop is provided for a beater or an intermediate beater. An impact absorber has two polymer-based absorber rings that are offset axially to one another and are disposed so that they overlap radially and has two iron-based disks disposed axially between the absorber rings.

Abstract: A hand-held power tool includes an antivibration element (1) for vibrationally decoupling a handle sub-assembly (6) from another sub-assembly (5) that vibrates along a vibration axis (A), and having a coil spring (7) oriented along the vibration axis (A), and a threaded plug (3) provided with an outer thread (4) longitudinally extending therealong, with the coil spring (7) having a plurality of windings (2) extending along a preload region (V) and screwed on the outer thread (4) under an axial compressive preload, and with the outer thread (4) having a between-flight width (Z) greater than a diameter (D) of the spring wire of which the coil spring (7) is formed.

Abstract: An oscillation damper (3) which is designed for being mounted on a housing (2) of a hand-held power tool (1) and includes an oscillating damping mass (4); and at least one spring (5) located completely, with respect to its axial length, within the damping mass (4) for axially compressively preloading the damping mass (4) against the housing (2) of the power tool (1).

Abstract: A pneumatically striking hand-held power tool is controlled by the following steps. An acceleration (a) along a striking axis (8) of the hand-held power tool (1) is detected. A driving power is reduced if the detected acceleration (a) is greater than a threshold value (A), the threshold value (A) being selected to be greater than maximum acceleration values (a1, a2) that occur on a workpiece during the striking operation of the hand-held power tool (1).

Abstract: The torque coupling has a shaft, a hollow shaft and a plurality of levers. The bearings of the levers are non-rotatably connected to the shaft and the levers are spring-loaded so as to be pressed against the hollow shaft. The levers are bent from a steel strip.

Abstract: An oscillation damper for a hand-held power tool (D) has at least one first spring (4) and at least one second, additional spring (9) for axially compressively preloading a damping mass (3) of the damper against the tool housing, and a user-operated switching element (8) having a first position in which the damping mass (3) is axially compressively preloaded against the power tool housing only by the at least one first spring (4), and a second position in which the switching means (8) connects the damping mass (3) with the at least one second additional spring (9) so that the damping mass (3) is axially compressively preloaded against the power tool housing by both the at least one first spring (4) and the at least one second, additional spring (9).

Abstract: A side-handle for a hand-held power tool includes a gripping element and a fastener for fastening the side handle to the hand-held power tool. The gripping element and the fastening means can be pivoted with respect to each other around a rotational axis. This rotational axis runs perpendicular to a longitudinal axis of the gripping element and runs through an end area of the gripping element facing away from the fastener.