A power tool includes a housing, a drive mechanism supported within the housing, a spindle operatively coupled to an output of the drive mechanism such that torque from the drive mechanism rotates the spindle about an axis, and a clutch assembly configured to selectively limit torque transfer from the drive mechanism to the spindle. The clutch assembly includes a plurality of rolling elements, a biasing member configured to bias the plurality of rolling elements into engagement with the output of the drive mechanism, and a sleeve movable along the axis to adjust a torque limit of the clutch assembly by varying a preload of the biasing member. The sleeve is made of a high-temperature, engineering thermoplastic.

An electronic switch module for a power tool is provided including a module body, a trigger moveable relative to the module body, a magnet being moveable relative to the module body with the trigger along a movement axis, and a linear Hall sensor fixed relative to the module body and intersecting the movement axis of the magnet. The linear Hall sensor magnetically detects a linear position of the magnet along the movement axis and outputs a voltage signal based on the detected linear position.

An adjustable stroke mechanism has a housing with a central axis and a wall enclosing a cavity. At least one counterweight is movably disposed within the cavity. A mounting assembly is disposed within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjustor couples the at least one counterweight with the mounting assembly. The stroke adjustor enables the counterweight and mounting assembly to move with respect to one another such that a distance between the counterweight and the mounting assembly is variably adjusted which, in turn, variably adjusts a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing.

Power tool methods and systems are provided for controlling an operating mode of the power tool. A power tool includes a housing having a handle portion and a top portion. An input control device is located on the top portion of the housing for changing an operational mode of the power tool. The plurality of operational modes include at least a forward mode and a reverse mode. A controller includes an electronic processor and a memory storing instructions that when executed by the electronic processor configure the controller to receive a mode signal from the input control device indicating the selected one of the plurality of operational modes and operate the motor responsive to the mode signal.

A power tool allows mode switching and clutch operation torque switching using a single ring. An electric vibration driver drill includes an internal gear that meshes with planetary gears, an internal gear lock pin that moves forward relative to the internal gear to lock the internal gear, a first vibration cam fixed to a spindle, a second vibration cam that rubs against the first vibration cam and rotate relative to a gear housing, a vibration switch lever that moves forward relative to the second vibration cam to lock the second vibration cam in a nonrotatable manner, and an annular change ring that switches between forward movement and rearward movement of the internal gear lock pins and switches between forward movement and rearward movement of the vibration switch lever.

A driving tool includes a tool body, a flywheel, a driver, a pressing mechanism and a solenoid. The solenoid has an actuation part configured to linearly move in a specified direction from an initial position when the solenoid is activated. The pressing mechanism includes a holder turnably supported around a rotation axis relative to the tool body, and a roller rotatably supported by the holder. The holder is turnable between a first position in which the roller is apart from the driver and a second position in which the roller abuts on the driver and presses the driver toward the flywheel to thereby enable transmission of the rotational energy to the driver. The actuation part is configured to turn the holder from the first position to the second position while moving from the initial position.

An electric power tool includes a holder, a motor, and a transmission mechanism. The motor includes a stator and a rotor. The rotor includes a rotary shaft and a rotor body. The rotary shaft is coupled to the transmission mechanism. The rotator includes at least the rotor body. The rotator rotates. The electric power tool further includes an absorbing member. The absorbing member has a property to absorb a lubricant. The absorbing member is arranged between the rotator and the transmission mechanism.

A power tool is provided including a housing, a brushless direct-current (BLDC) motor, and a gear assembly. The motor includes a stator having an inner stator, a rotor shaft extending along a center axis and including a first bearing and a second bearing; an outer rotor, a first end cap, and a second end cap. The first end cap includes a radial back plate having a center opening in the radial back plate through which the rotor shaft extends and pins projecting around the rotor shaft and parallel to the rotor shaft. The gear assembly is mounted on the first end cap and includes planetary gears supported by the pins in engagement with the rotor shaft.

A tool with a transmission having a reduction gearset and a speed selector. The speed selector has a member, an actuator and a shifter assembly. The member is movable between a first position, in which the member is non-rotatable, and a second position in which the member is coupled to a planet carrier of the reduction gearset for common rotation. The actuator includes a pivoting yoke and a follower that is coupled to the yoke. The follower engages the member so as to be axially movable with the follower. The shifter assembly has a selector switch, a switch fork, and a pair of springs. The selector switch is slidable between a first switch position and a second switch position. The shift fork is slidably coupled to the selector switch and receives the yoke. The springs cooperate to bias the shift fork relative to the selector switch into a neutral position.

An adjustable stroke mechanism has a housing with a central axis and a wall enclosing a cavity. At least one counterweight is movably disposed within the cavity. A mounting assembly is disposed within the cavity. The mounting assembly has a workpiece attachment mechanism. A stroke adjustor couples the at least one counterweight with the mounting assembly. The stroke adjustor enables the counterweight and mounting assembly to move with respect to one another such that a distance between the counterweight and the mounting assembly is variably adjusted which, in turn, variably adjusts a stroke radius of the workpiece attachment mechanism with respect to the central axis of the housing.