Abstract: A power tool includes a brake assembly including a swing member swingable about a pivot at an axial center decentered from a center of a brake member, a press member held by the swing member to come in contact with the brake member in response to the swing member swinging, and a spring having an axial center at a second decentered position opposite to the pivot with the center of the brake member between the axial center and the pivot. The axial center is on a second line orthogonal to a first line extending through the center of the brake member and the pivot. The spring has an elastic movable end in contact with an end of the swing member to urge the swing member to a position at which the press member is in contact with the brake member with a switch being in an off state.

Abstract: A work tool includes a motor, a driving mechanism, a body housing and a handle. The driving mechanism is configured to perform an operation of linearly reciprocating the tool accessory along a driving axis extending in a front-rear direction. The handle includes a grip part extending substantially in an up-down direction, and a battery-mounting part provided on a lower side of the grip part. An upper end portion of the handle is connected to a rear end portion of the body housing via an elastic member so as to be movable relative to the body housing. A lower end portion of the handle is connected to the rear end portion of the body housing so as to be rotatable relative to the body housing, around a rotation axis extending in a left-right direction. The rotation axis is located on a lower side of the battery-mounting part.

Abstract: A long rod polishing device includes a prismatic or columnar battery, a battery mounting portion, an electric motor, a pad, and a rod portion. The battery is mountable to the battery mounting portion. The electric motor is driven by an electric power from the battery. The pad has a polishing surface and moves by a driving force from the electric motor. The rod portion has an end portion to which the pad is coupled. The battery mounted to the battery mounting portion has a longest side. The longest side has a direction so as to form an angle with respect to a second imaginary straight line. The second imaginary straight line is perpendicular to both of a center axis of the rod portion and a first imaginary straight line. The first imaginary straight line is perpendicular to the center axis and parallel to the polishing surface of the pad.

Abstract: A leak of a lubricant oil contained in a hammer case is reduced. An impact tool includes a motor including a rotor, a striker rotatable by the rotor, an anvil strikable by the striker, a hammer case having an opening, an anvil bearing fixed to the hammer case inside the hammer case and supporting the anvil, a seal between the anvil bearing and the anvil inside the hammer case, and a support facing the opening and supporting the seal from a front. The support has a smaller inner diameter than the opening.

Abstract: A power tool includes an accessory and a reader. The accessory is configured to be attachable to and detachable from the power tool. The accessory includes a passive wireless tag. The reader includes at least one antenna and a reading part. The reading part is electrically connected to the at least one antenna. The reading part is configured to wirelessly communicate with the wireless tag via the at least one antenna and to read information stored in the wireless tag when the accessory is attached to the power tool.

Abstract: A rechargeable cleaner includes a body, a rechargeable battery, and a charger. The body is configured to generate suction power capable of sucking dust together with air using a motor. The rechargeable battery is configured to supply electric power to the motor. The charger is configured to charge the battery at a charging rate of 3 C or higher and lower than 10 C.

Abstract: A rotary shaft is spline coupled to a carrier of a final-stage planetary gear mechanism. A bearing for supporting the rotary shaft is arranged on an outer circumferential side of the carrier. The bearing and the carrier are arranged so as to overlap in a direction perpendicular to a motor axis.

Abstract: An electric power tool disclosed herein may include a motor; a power transmission mechanism connected to the motor; a housing that houses the motor and the power transmission mechanism; a tip tool holder connected to the power transmission mechanism; a cover covering the tip tool holder partially; a first locking mechanism configured to switch between a first locking state and a first unlocked state; and a second locking mechanism configured to switch between a second locking state and a second unlocked state. In the electric power tool, the cover may become detachable from the housing when the user performs the second unlocking operation on the second locking mechanism and the first unlocking operation on the first locking mechanism.

Abstract: A working machine may work by moving frontward on a ground. The working machine may include: a battery; an electric motor comprising a stator and a rotor and configured to be driven by electric power supplied from the battery; a working unit configured to work on the ground by being rotated about a rotary axis by the electric motor, the rotary axis being substantially parallel to a virtual ground perpendicular to an up-down direction; and a transmitting unit configured to transmit rotation of the electric motor to the working unit. When the working machine is viewed from a front side with the working machine being in a working posture, the battery, the electric motor, and the working unit may be separate from each other in the up-down direction and the working unit may be disposed below the battery and the electric motor.

Abstract: A power tool having a hammer mechanism, including: a connecting part connectable with a dust collector, and with a connection flow path to suck in the air from the dust collector to generate a suction power in the dust collector; a motor with a rotating shaft; a first fan to rotate with the rotating shaft and generate a first air flow to cool down the motor; a second fan to rotate with the first fan and generate a second air flow to generate the suction power; a housing with a first exhaust port to discharge the first air flow and a second exhaust port to discharge the second air flow; a first exhaust flow path to guide the first air flow to the first exhaust port; and a second exhaust flow path separated from the first exhaust flow path to guide the second air flow to the second exhaust port.

Abstract: A reciprocating tool includes a body housing, a handle member and an elastic member. A first one of the body housing and the handle member includes a first coupling part, while a second one includes a second coupling part. The first coupling part includes an internal space, and an opening that communicates with the internal space and an outside space of the first coupling part. At least a portion of the second coupling part protrudes into the internal space through the opening and is movable relative to the first coupling part in the front-rear direction within the opening. The elastic member is disposed in the internal space and is configured to bias the first coupling part and the second coupling part such that the body housing and the handle member are biased away from each other in the front-rear direction.

Abstract: A reciprocating tool includes a motor, a motion converting mechanism, a body housing, an inner housing, a support body, and a counterweight. The motion converting mechanism is operably coupled to a motor shaft and is configured to convert rotation into a linear reciprocating motion along a driving axis. The inner housing is within the body housing and houses at least a portion of the motion converting mechanism. The support body is originally separate from the inner housing and is attached to the inner housing in the body housing. The counterweight is operably coupled to the motion converting mechanism and is configured to be driven by the motion converting mechanism. The counterweight is supported by the support body to be pivotable around a pivot axis that extends in a direction orthogonal to the driving axis. At least a portion of the counterweight is housed in the inner housing.

Abstract: A power tool attachment efficiently guides light and provides sufficient illumination when attached to a power tool. A power tool attachment is attachable to a power tool to cover a light source included in the power tool. The power tool attachment includes a light guide being a single member made of a transparent resin. The light guide includes a light receiver that receives light from the light source when the power tool attachment is attached to the power tool, and a light emitter that outputs the received light.

Abstract: A driving tool includes a driver configured to linearly move forward along a driving line to thereby strike and drive a fastener into a workpiece. The driver includes a striking member, a support member, and an engagement member engaged with the striking member and the support member and configured to restrict movement of the striking member relative to the support member in a front-rear direction. The support member includes a support surface supporting a portion of the striking member, at least one receiving surface configured to receive a reaction force to the striking member caused by driving of the fastener, and restricting parts spaced apart from each other in the front-rear direction, located at an opposite side of the striking member from the support surface in a crossing direction crossing the support surface, and configured to restrict movement of the striking member in a direction away from the support surface.

Abstract: A screw-tightening tool includes a housing, a spindle, a motor, and a power-transmitting mechanism including a sun member, a ring member, a carrier member and a planetary roller. The power-transmitting mechanism is configured such that, when the ring member moves rearward to be closer to the sun member in response to rearward movement of the spindle, the planetary roller transmits power of the motor to the spindle owing to frictional force between the planetary roller and each of a first tapered surface of the sun member and a second tapered surface of the ring member. The sun member is configured to move from a first position to a second position, which is forward of the first position, when the frictional force reaches a threshold, and to move from the second position to the first position when the frictional force falls below the threshold.

Abstract: An electric work machine (1), such as a power tool, comprises a motor (50), a manipulatable part (12) such as a trigger switch, and a control part (36). The motor is energized with electric current supplied by a battery pack (22). By manipulating the manipulatable part, the control part energizes the motor. The control part also acquires information concerning the state of the battery from the battery pack, and, if appropriate based on the information obtained from the battery pack, takes measures (such as limiting a discharge current) to restrain, delay and possibly avert the performance of a protection (discharge-prohibited) operation by the battery pack.

Abstract: A portable power tool includes a tool accessory, drive mechanism, housing and grip having a rotating axis. The grip includes grip portion having a first face and a second face. The grip portion is formed in a rotation asymmetric shape to the rotating axis. The grip is attachable to the housing with respect to a rotating angle around the rotating axis at a first angle and a second angle. When the grip is viewed in the rotating axis extending direction, the position of the first surface and the position of the second surface in the circumferential direction around the rotating axis in a case that the rotating angle is at the first angle are different from the position of the first surface and the position of the second surface in the circumferential direction around the rotating axis in a case that the rotating angle is at the second angle.

Abstract: An electric work machine (1) includes a motor (8) having a rotor (23) disposed within a stator core (31) and coils (34) disposed on the stator core; a power-transmission mechanism (10) driven by the rotor; and an output shaft (6), on which a tool accessory is mountable and which is operably driven by the power-transmission mechanism. The stator core includes an outer-side member (40) having projection parts (42) protruding radially inward from a circular-ring part (41) in a spaced apart manner in a circumferential direction of the stator core and respectively supporting the coils; and an inner-side member (43) disposed radially inward of the outer-side member and coupled to inner-end portions of the projection parts. A plurality of first insulators (32) and a plurality of second insulators (33) may be respectively disposed around the projection parts and interconnected in an alternating manner in the circumferential direction.