A power tool includes a power mechanism including a drive shaft; an oscillating mechanism; an airflow element connected to the drive shaft; a heat conducting portion supported on the drive shaft, where the airflow element is disposed on the heat conducting portion. The oscillating mechanism includes a support assembly sleeved on the drive shaft and an oscillating member. Heat generated by the oscillating mechanism is conducted to the heat conducting portion through the drive shaft, the heat conducting portion has a thermal conductivity greater than or equal to 50 W/m•°C, and a ratio of an axial distance L1 of a portion of the heat conducting portion in contact with the drive shaft to a distance L2 of a thermally conductive portion of the drive shaft between the heat conducting portion and the support assembly is greater than or equal to 0.1 and less than or equal to 5.

A rotary power tool includes a housing, a spindle defining a working axis, and a motor supported by the housing. The motor is operable to drive the spindle. The rotary power tool also includes a handle movably coupled to the housing and a vibration isolating assembly disposed between the housing and the handle. The vibration isolating assembly attenuates vibration transmitted from the housing to the handle. A battery pack is removably coupled directly to the handle and configured to provide power to the motor.

A shock absorbing device for a rechargeable battery, in particular for supplying a machine tool with electrical energy, wherein the rechargeable battery includes a housing for accommodating at least one energy storage cell. The shock absorbing device includes at least one shock absorbing element for absorbing shock energy exerted on the housing of the rechargeable battery.

The present disclosure is directed to a cordless reciprocating saw including a mechanical interface for attaching a removable battery pack. The mechanical interface includes a strike plate to reduce the effects of vibrational forces on the battery pack.

A compacting tool includes an upper mass, a lower mass coupled to the upper mass, a driving axis extending centrally through the upper mass and the lower mass, a motive source supported by the upper mass, the motive source including an output shaft, a battery configured to provide power to the motive source, a handle coupled to the upper mass, a user interface supported by the handle and configured to receive an input to control the motive source, and a drive mechanism configured to convert rotational movement of the output shaft to reciprocating movement of the lower mass. The drive mechanism includes a multi-stage transmission operatively coupled between the output shaft of the motive source and the lower mass.

A power tool effectively isolates vibration with an auxiliary handle having no structure for isolating vibration. A power tool to which an auxiliary handle is attachable includes a housing, a nut held on a side surface of the housing to be screwed with the auxiliary handle, and an elastic member between the housing and the nut.

A power tool includes a housing, a battery connection portion supported by the housing, a drive mechanism configured to operate a working element, and a brushless DC motor positioned within the housing and connected to the drive mechanism. The motor includes a rotor, stator surrounding the motor, and an output shaft fixed to the rotor such that movement of the rotor is transmitted to the output shaft. The motor also includes a fan coupled to the output shaft to rotate with the output shaft and the rotor, and a brass bushing fixed to the output shaft to rotate with the rotor and the output shaft relative to the stator. The bushing includes a balancing feature.

An electric motor includes first and second balancing members coupled to an output shaft for rotation with a rotor. The first and second balancing members substantially balance a mass of the rotor about a longitudinal axis of the output shaft to reduce vibrations of the electric motor during use. The first balancing member includes a brass bushing supported on the output shaft adjacent a first face of the body of the rotor. The brass bushing includes a hole drilled into an outer circumference of the brass bushing providing a first balancing feature of the electric motor. The second balancing member includes a fan supported on the output shaft adjacent a second face of the body of the rotor. The fan includes a plurality of fins extending from a first face of the fan and a second balancing feature of material removed from a second face of the fan.

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 hand tool for reducing hand vibration, including a casing, a driving module, a power module and a workpiece. The casing includes a front section, a rear section, and a buffering section connected between the front and rear sections. The buffering section is made of an elastic material. The rear section is adapted for gripping. The driving module is disposed on the front section. The power module is disposed on the rear section, and is electrically connected to the driving module to supply electricity to the driving module. The workpiece is connected to the driving module, extends out of the front section, and is driven by the driving module to operate.