A power machine tool (1) of the present disclosure includes a housing (10) and a control board (20), a power device (30), a bearing set (40), a transmission mechanism (50) and a torque axle (60) disposed in the housing (10). The power device (30) is disposed in the housing (10) via the bearing set (40) and transmits a torque via the transmission mechanism (50). The torque axle (60) is connected to a rear side of the power device (30) and rotates with the power device (30). In addition, a torque sensor (2) is arranged on the rear side of the power device (30) to detect the torque of the power machine tool.

A hand-held power tool includes an electronically commutated motor including a motor winding. Motor electronics of the hand-held power tool are configured to electronically commutate the motor winding using a selected one of a plurality of electrical precontrol angles, thereby adapting the motor winding to different mechanical load conditions of the electronically commutated motor.

A reversing mechanism for a pneumatically or hydraulically powered tool having a rotor adapted to selectively rotate in either one of first and second rotational directions. The reversing mechanism allows a user to actuate a button that rotates a valve to direct air flow through the tool. By pressing the button, the button will move a base laterally, and in doing so, rotates the valve. Rotating the valve distributes fluid to cause the rotor to rotate in a selected rotational direction.

The present specification relates to a power tool comprising an input shaft and an output shaft and a two-speed power transmission comprising a planetary gear and a gear shift assembly for directing torque through or past the planetary gear comprising a driving member, a driven member and an axially movable coupling sleeve arranged to intercouple in a first position the driving member and the driven member and to intercouple in a second position the planetary gear and the driven member. A linear actuator is arranged to displace the coupling sleeve between the first and second position, wherein the linear actuator comprises a linearly movable push bar arranged for displacing the coupling sleeve. The present specification also relates to a method in and a two-speed power transmission for such a power tool.

A handheld power tool with a rotatable tool, in which the handheld power tool is a saw blade or milling cutter. The handheld power tool includes a sensor device for detecting a mechanical vector quantity. The mechanical vector quantity includes a force, an acceleration, a velocity, a deflection, a deformation and/or a mechanical stress and the mechanical vector quantity depends on a force emanating from the handheld tool. The handheld power tool also includes a control device which is communicatively coupled to the sensor device and is adapted to recognize an event and/or a state of the power tool according to a direction and/or change of direction of the mechanical vector quantity detected by the sensor device.

A power tool (130) may include an end effector (200) configured to engage an object to be worked by the tool, a power unit (230), a drive assembly (210) configured to drive the end effector responsive to application of input power thereto, and a motor (220) configured to supply the input power to the drive assembly selectively based on operation of a power control assembly (240) that controls coupling of the motor to the power unit. The power control assembly includes a trigger (300) having a full range of motion (310) between a rest position and an actuated position. The power control assembly further defines a transition point (316) between a first region (312) and a second region (314) of the full range of motion. The power control assembly includes a first biasing assembly (330) that opposes movement of the trigger in the first region, and a second biasing assembly (340) that opposes movement of the trigger at least at the transition point.

A motor retainer is provided on an inner circumferential surface of a housing and retains an outer circumference of a motor unit. A rotation detector includes a rotating body attached to a motor shaft and a position detector that outputs a rotational position signal corresponding to a rotational position of the rotating body. A sensor substrate retainer is provided on the inner circumferential surface of the housing and retains the position detector at a position facing the rotating body.

A method for operating a machine tool, in particular an angle grinder, comprising a tool rotatably bringable into operative connection with a driven shaft, the machine tool having a drive device for actuating the driven shaft, a control device for actuating the drive device and at least one sensor device operatively connected to the control device. The method has the following steps: determining a speed value of the driven shaft; determining a speed value of the tool using the sensor device, which interacts with the tool, controlling an output device and/or controlling, in a predefined manner, the drive device via the control device when a difference between the determined speed value of the driven shaft and the determined speed value of the tool is greater than a defined limit value. A machine tool for carrying out a method of this kind is also described.

A hand-held power tool includes a drive unit that has at least one gear-shift transmission which can shift at least between two different gear steps; a striking mechanism that can be activated for performing a striking mode is associated with the drive unit; a shifting unit is provided for shifting the gear-shift transmission between the at least two different gear steps and/or for activating/deactivating the striking mechanism, and a communication interface is provided for communicating with a user-actuated user guiding unit and is configured to receive shifting instructions from the user guiding unit in order for the transmission to shift in an application-specific manner between the two different gear steps and/or for the striking mechanism to be activated/deactivated.

A rotating power tool is provided. The rotating power tool may include a bevel gear set having a bevel gear and a conductive spiral disposed on the bevel gear. The conductive spiral may be configured to, in response to the bevel gear deforming due to a torque being applied to the bevel gear, change a resistance of the conductive spiral. The rotating power tool may further include an antenna electrically connected to the conductive spiral. The antenna may be configured to emit an output signal at a frequency that is based on the resistance value of the conductive spiral. The frequency of the output signal may be indicative of an amount of torque being applied to the bevel gear.