A power tool including a housing having a handle configured to be grasped by a user, a motor supported by the housing, a driving gear rotated by the motor, and a driven gear engaging the driving gear to be rotated by the driving gear about a rotation axis. The power tool also includes a pin extending from the driven gear and offset from the rotation axis and a spindle having a yoke coupled to the pin to translate rotation of the driven gear into reciprocating motion of the spindle. A notch is formed in an outer periphery of the yoke to provide clearance for the driving gear as the spindle is driven by the pin.

An electric tool includes a rotary wheel driven to rotate around a central axis thereof, an action member configured to bear a cutter of the electric tool, and a counterweight. The rotary wheel drives the action member such that it reciprocates linearly in a first direction. The rotary wheel simultaneously drives the counterweight such that it not only reciprocates linearly in the first direction in an opposite manner to the action member, but also performs reciprocating swinging movement in a plane perpendicular to the central axis. The first direction is parallel to the plane.

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 blade clamp is configured for use with a power tool having a reciprocating spindle. The blade clamp includes a cover assembly rotatably coupled to the spindle, and a detent received within a first bore of the spindle. The detent is movable in a radial direction relative to a longitudinal axis of the spindle by engagement with the cover assembly to adjust the blade clamp between a locked configuration and an unlocked configuration. The blade clamp further includes a sleeve in which the detent is slidably received. The sleeve is at least partially positioned within the first bore. A plunger is positioned within a second bore of the spindle. The second bore extends along a longitudinal axis that is parallel with the longitudinal axis of the spindle. The second bore is contiguous with a blade slot of the spindle.

A reciprocating saw includes a housing, a motor, and a drive mechanism. The motor is configured to operate in a forward mode corresponding to a first rotational direction, and in a reverse mode corresponding to a second rotational direction opposite the first rotational direction. The drive mechanism includes a driven gear, a connecting rod, an output shaft, and a counterweight. The driven gear is rotated by the motor and has an upper portion and a lower portion. The output shaft reciprocates through a cutting stroke and a return stroke. The counterweight is coupled to the driven gear and rotating with the driven gear. When the motor is operated in the forward mode, the counterweight moves through the upper portion of the driven gear during the cutting stroke of the output shaft, and moves through the lower portion of the driven gear during a return stroke of the output shaft.

A power tool includes a housing, a motor, and a drive mechanism. The drive mechanism includes a driven gear that is rotated by the motor. The driven gear is vertically-oriented within the housing and has an upper portion and a lower portion. The drive mechanism also includes a connecting rod coupled to the driven gear to translate rotary motion of the driven gear into reciprocating motion, and an output shaft coupled to the connecting rod to reciprocate relative to the housing through a cutting stroke and a return stroke. The drive mechanism further includes a counterweight coupled to the driven gear for rotation with the driven gear. The counterweight moves through the upper portion of the driven gear during the cutting stroke of the output shaft, and moves through the lower portion of the driven gear during a return stroke of the output shaft.

A method of assembling a gearcase cover assembly of a reciprocating saw. The method includes providing a gearcase cover with a cylindrical opening and a receiving portion, providing a shaft with a yoke affixed to the shaft, inserting a first end of the shaft into the cylindrical opening and rotating the shaft such that a second end of the shaft sits in the receiving portion.

An electric power tool includes a drive device for providing a driving force, a rotation wheel that has a central axis and is driven by the drive device to rotate around the central axis, a spindle that supports a tool holder configured to hold a tool of the electric power tool, a first intermediate member, a second intermediate member, and a counterweight device. The first intermediate member is offset from the central axis of the rotation wheel, and revolves around the central axis when driven by the rotating rotation wheel, while driving the spindle to reciprocate in a first direction. The second intermediate member is driven by the first intermediate member to rotate around the central axis and is disposed to be offset from the central axis of the rotation wheel on the side opposite the first intermediate member. The counterweight device is driven by the second intermediate member.

A reciprocating saw includes a housing including a handle defining a handle axis extending centrally through the handle from a first end to a second end of the handle, a battery receptacle located adjacent the second end of the handle, a battery insertable into and removable from the battery receptacle along a battery axis, a motor powered by the battery and including a motor shaft rotatable about a motor axis, and a spindle configured to reciprocate along a spindle axis in response to rotation of the motor shaft. The spindle axis is parallel to the motor axis.

A reciprocating saw includes a housing including a handle defining a handle axis extending centrally through the handle from a first end to a second end of the handle, a battery receptacle located adjacent the second end of the handle, a battery insertable into and removable from the battery receptacle along a battery axis, a motor powered by the battery and including a motor shaft rotatable about a motor axis, and a spindle configured to reciprocate along a spindle axis in response to rotation of the motor shaft. The spindle axis is parallel to the motor axis.