An electrical tool includes a housing, a motor, a bearing set and a shock-absorbing element. The motor is disposed in the housing and has a driving shaft and a nut. The bearing set is arranged on a side of the motor and includes a bearing seat, a bearing and a tool spindle. The tool spindle has a slot disposed at one end thereof facing the motor, and another end thereof is disposed protrusively from the bearing seat. One end of the driving shaft is combined in the slot through the nut. The shock-absorbing element sheathes the nut and is attached to an inner wall of the slot to reduce the vibration and noise during the operation of the electrical tool.

A power tool includes a body housing including a first grip, inlet facing a front surface of the first grip, first outlet, and second outlet; a brushless motor held on the body housing and including a rotational shaft; an output unit supported on the body housing in a reciprocable manner; a power transmission mechanism between the brushless motor and the output unit in the body housing to transmit rotational motion of the rotational shaft to the output unit; a controller held on the body housing to control the brushless motor; and a fan held on the body housing and mounted on the rotational shaft. The body housing allows air drawn through the inlet and having cooled the brushless motor to be divided into first and second outlet blows respectively cooling the power transmission mechanism and discharged through the first outlet, and cooling the controller and discharged through the second outlet.

A power tool is provided including a housing; an electric motor disposed within the housing; a main trigger switch mounted on the housing; a side handle mounted on the housing, the side handle having an auxiliary trigger; and a controller disposed within the housing operable to control a flow of electric current from a power source to the electric motor. The controller activates the motor only if the main trigger and the auxiliary trigger are both actuated. If the one of the triggers is released while the other trigger is still engaged, the controller is configured to continue operating the motor only if the released trigger is reengaged within a time threshold, but otherwise discontinue operating the motor until both the main trigger and the auxiliary triggers are released and reengaged.

A power tool includes a housing, a motor that is disposed within the housing and defining a first axis, and a tool holder driven to oscillate about a second axis by the motor. The second axis is perpendicular to the first axis. The power tool also includes a vibration dampening assembly with a counterweight that is configured to reciprocate along a third axis that is perpendicular to both the first axis and the second axis in response to oscillation of the tool holder about the second axis.

An electric hand-held power tool (100), in particular a hammer drill or chipping hammer, having a percussion mechanism assembly (10), which vibrates along a vibration axis (A), and a handle assembly (20), which is vibrationally decoupled via an anti-vibration unit (30), wherein the anti-vibration unit (30) has a coil spring (35), oriented along the vibration axis (A), having a plurality of turns, wherein the coil spring (35) is in the form of a cylindrically progressive compression spring (36) having two stiffness regions (S1, S2) with different levels of stiffness.

A power tool has a motor having a rotary shaft, an eccentric shaft configured to be rotated around a rotation center axis of the rotary shaft, and a balancer configured to rotate with the rotary shaft. When viewed along the rotation center axis, (1) a first imaginary line passes the rotation center axis and an eccentric axis, (2) an imaginary perpendicular line crosses perpendicularly to the first imaginary line and passes the rotation center axis, (3) a center of gravity of the balancer is located in a region on a side opposite to the eccentric axis across the imaginary perpendicular line; and (4) a second imaginary line passes the rotation center axis and the center of gravity of the balancer and (5) the second imaginary is inclined at an inclination angle larger than 0° and smaller than 90° in a direction opposite to a rotating direction of the rotary shaft.

A power tool includes a spindle, a motor, an inner housing and an outer housing elastically connected to the inner housing. The inner housing is formed by a first inner housing portion formed of metal connected to a second inner housing portion formed of synthetic polymer. The first inner housing portion includes a housing part disposed in a front part of the outer housing, and a first extending part extending rearward from the housing part and disposed in a grip part of the outer housing. The second inner housing portion includes a second extending part that has a tubular shape and at least partially surrounds the first extending part, and a rear end part connected to the second extending part and disposed in a rear part of the outer housing. The first extending part extends rearward of a center of the second extending part in the front-rear direction.

A handheld power tool has an electric connecting socket and a handle for handling the power tool. The handle includes a plurality of components, wherein at least one component of the handle is used as a mounting of the electric connecting socket.

Methods and apparatus for a vibration dampening system having an adaptor with a user contact surface and a power tool contact surface. The adaptor can include a core to reduce vibration transfer from the tool to the hands of a user. In embodiments, the core comprises a viscoelastic material that lightens a base elastomer to form liquid-filled closed cells structures.

A power tool including a housing, a controller within the housing, and a brushless motor within the housing and controlled by the controller. The brushless motor including a stator assembly including a stator core having stator laminations with an annular portion and inwardly extending stator teeth. The stator assembly defines a stator envelope in an axial direction extending between axial ends of stator end caps of the stator assembly. The brushless motor further includes a rotor assembly including a rotor core having rotor laminations and defining a central aperture that extends in the axial direction and that receives a shaft, and a position sensor board assembly including position sensors and configured to provide position information of the rotor core to the controller. The rotor assembly and the position sensor board assembly are provided at least partially within the stator envelope.