Abstract: An electric power tool includes a housing, a fan, a tubular portion, and a rectifier. The housing houses a motor. The fan rotates in association with driving of the motor to generate a cooling air for the motor within the housing. The tubular portion is formed in the housing to house the fan. The rectifier is disposed to be opposed to the fan in an upstream side of the cooling air. The rectifier is divided into an inside and an outside in a radial direction of the tubular portion, the outside in the radial direction is formed of the tubular portion, and the inside in the radial direction is formed of a baffle plate assembled to the housing.

Abstract: A dust box is provided that is configured to be removably mounted to a belt sander having a housing, and a discharge nozzle and a suction nozzle that are connected to the housing. The dust box has a first nozzle configured to be connected to the discharge nozzle, a second nozzle configured to be connected to the suction nozzle, a container part formed of synthetic resin and connected to the first and second nozzles, and a filter. The filter is configured to separate dust from air. The filter is provided within the container part to partition an inside space of the container part into a first space that communicates with the first nozzle and a second space that communicates with the second nozzle.

Abstract: An electric work machine reduces noise from the electric work machine. An electric work machine includes a motor including a stator including a stator core and coils, and a rotor including a rotor core and a rotor shaft, an output unit located frontward from the motor and rotatable with a rotational force from the motor, a first support having a first contact surface in contact with a front end face of the stator core, a second support having a second contact surface in contact with a rear end face of the stator core, and a screw connecting the first support and the second support and fastening the stator core to the first support and the second support in a front-rear direction.

Abstract: A belt sander has an electric motor, a housing including a motor housing part, belt driving part, first handle and battery mounting part. Where a direction in which a rotational axis of the drive roller and the driven roller extend is a left-right direction, a direction wherein the rollers are arranged in parallel is a front-rear direction, and a direction orthogonal to the left-right and front-rear directions is an up-down direction, the belt driving part is below the motor, and a polishing surface is defined by a lower surface of the sanding belt. The battery mounting part is configured so a battery can be mounted and removed by being slid in a sliding direction. The mounting part overlaps with the polishing surface viewed from above and overlaps with the motor viewed from the front. The sliding direction of the battery is a horizontal direction including the front-rear and left-right directions.

Abstract: A portable electric tool includes an output shaft extending in an axial direction and configured to be rotatable, a tool accessory configured to perform an eccentric circular motion according to the rotation of the output shaft, a dust collection fan fixed to the output shaft so as to circumferentially surround the output shaft, a motor disposed on an opposite side of the dust collection fan from the tool accessory in the axial direction and configured to provide a rotational driving force to the output shaft, a motor cooling fan disposed between the dust collection fan and the motor in the axial direction, a first weight attached to one of the dust collection fan and the motor cooling fan and having a specific gravity higher than the one of the fans, and a second weight disposed at a position different from the first weight in the axial direction.

Abstract: A battery-powered dolly in one aspect of the present disclosure includes a handle, a connector, a motor, a wheel, a detector, a rotation information acquirer and a controller. The controller stops supplying an electric power from a battery to the motor based on (i) a battery current value and/or a battery voltage value detected by the detector and (ii) a rotation information acquired by the rotation information acquirer.

Abstract: An electric work machine includes: a motor comprising a stator including coils, a rotor rotatable relative to the stator, and a rotor shaft fixed to the rotor; an output unit driven by the rotor shaft; a motor case including a main body having an insertion opening, and a lid disposed on one side in an axial direction relative to the main body and connected to the main body to close the insertion opening; and a resin portion that includes a first portion covering the coils and a second portion disposed on one side in the axial direction relative to the first portion. The first and second portions are integrated. Each of the first and second portions has a tubular shape. A second inner diameter indicating an inner diameter of the second portion is larger than a first inner diameter indicating an inner diameter of the first portion.

Abstract: A representative fastening tool which fastens a work piece by utilizing a fastener that includes a pin in which a shaft portion and a head portion are integrally formed and a hollow shaped collar which is engageable to the pin, wherein the work piece is disposed between the head portion and the collar. The fastening tool includes a pin holding portion which can hold an end part region of the shaft portion, wherein the fastener is fastened in a state that the collar and the head portion clamp the work piece and the end part region is integral with the shaft portion, wherein the controller has the pin holding portion move in the first direction to conduct the fastening of the fastener by a motor drive control mode defined as a drive control of the motor based on motor drive current and motor drive electric power.

Abstract: A battery-operated device in one aspect of the present disclosure includes first to fourth current paths. A first end of the first current path and a first end of the third current path are connected to a first battery. A first end of the second current path and a first end of the fourth current path are connected to a second battery. A second end of the first current path is connected to a second end of the second current path. A second end of the third current path is connected to a second end of the fourth current path. The battery-operated device further includes a first switch on the first current path, a second switch on the second current path, a first rectifier on the third current path, and a fourth rectifier on the fourth current path.

Abstract: A working machine may include a working part, a body including a motor accommodating part, a fan accommodated in the motor accommodating part and a motor accommodated in the motor accommodating part and configured to drive the working part and the fan. The fan may include a disk plate including a circular opening defined at a center of the disk plate, a plurality of vanes attached to the disk plate, and a cover part. The plurality of vanes may be covered by the disk plate and the cover part in an axial direction.

Abstract: A working machine may include: a first blade; a second blade overlapping with the first blade in an up-down direction; and a holding unit configured to hold the first blade and the second blade overlapping each other in the up-down direction. The first blade may be configured to reciprocate in a direction perpendicular to the up-down direction with respect to the second blade. The first blade may include a first elongated hole having a longitudinal direction along the reciprocating direction. The second blade may include a second elongated hole having a longitudinal direction along the reciprocating direction. The holding unit may include: a holding part inserted in the first elongated hole of the first blade and the second elongated hole of the second blade; and an outer sleeve having a cylindrical shape and supported by the holding part such that the outer sleeve is rotatable around the holding part.

Abstract: A working machine may include a working part and a body including a motor accommodating part. The body may include a fan, a motor, and one or more first air intake openings. The motor accommodating part may include a wall and a second air intake opening. In a case where the fan is driven, air outside the body may pass through the one or more first intake openings and the second intake opening sequentially in this order, and flows into the motor accommodating part. At least one of the one or more first intake openings may be positioned above the second intake opening in a working state of the working machine. In the axial direction, the one or more first intake openings may be positioned on a second side of the second intake opening, the second side being opposite the first side in the axial direction.

Abstract: A working machine may include a working part, a fan, a motor configured to drive the working part and the fan, a body housing accommodating the fan and the motor and including a battery accommodating part which defines a battery accommodating space and a battery pack accommodated in the battery accommodating part. The battery accommodating part may include an air intake opening for intaking air from inside of the body housing into the battery accommodating space and an air exhaust opening for exhausting air from the battery accommodating space to the inside of the body housing. An air intake tube protruding from the battery accommodating part to the inside of the body housing may be connected to the air intake opening of the battery accommodating part.

Abstract: A power tool includes a resin member in a rotor that is less susceptible to breaking. A power tool includes a stator, a rotor rotatable relative to the stator at a speed of 30000 rpm or greater, and an output unit drivable by the rotor. The stator includes a stator core, an insulator fixed to the stator core, and a coil held on the insulator. The rotor includes a rotor core having a slot, a permanent magnet received in the slot in the rotor core, and a resin member fixing the rotor core and the permanent magnet. The resin member includes an annular portion protruding from an end face of the rotor core. The annular portion includes a cut portion.

Abstract: A dust cover has improved operability for attachment and detachment. A power tool to which a disk tool is attachable includes an electric motor including a motor shaft, a housing accommodating the electric motor and having an inlet to draw outside air, a dust cover being a plate including a filter covering the inlet and being attachable to and detachable from the housing, a grip extending from the housing in a direction perpendicular to the motor shaft and located between the disk tool and the inlet in a direction in which the motor shaft extends, and a spindle coaxial with the motor shaft, protruding from an end of the housing to receive the disk tool, and rotatable by the electric motor.

Abstract: A grinder includes a locking assembly to lock a spindle in a head housing and has outlets with a large opening area for high cooling efficiency. A grinder includes a main housing accommodating a motor and a fan, a spindle, a locking assembly that locks rotation of the spindle, and a head housing including a joint connected to a front of the main housing, and a compartment accommodating the spindle and the locking assembly. The compartment is laterally less wide than the joint. The locking assembly is located at a middle in a lateral direction of the head housing. The joint has, in a portion of a front surface of the joint, a first outlet at least on a right or a left of the compartment to discharge air for cooling the motor generated from rotation of the fan.

Abstract: An electric work machine avoids use of more lead wires. The electric work machine includes an operation unit operable in an operation mode of at least three operation modes, an operable member movable to switch the operation mode, a plurality of mode sensors located in a direction of movement of the operable member to detect the operable member and being equal in number to or fewer than the at least three operation modes, a mode sensor board on which the plurality of mode sensors are mounted and including an output terminal connected to the plurality of mode sensors, and a controller board connected to the output terminal with an output lead wire to determine the operation mode based on an output signal output from the output terminal.

Abstract: An electric working machine may include: an electrical component; a first space in which the electrical component is disposed; a partition wall separating the first space from a second space different from the first space, the partition wall including a first communication opening communicating the first space and the second space; and a first one-way valve disposed at the first communication opening.

Abstract: A work tool includes: a motor; a housing; an operation member extending in a longitudinal direction of the tool along the housing, configured to be pivotal about a pivotal axis by being subjected to a grip operation by a user, and exposed outside the housing on both first and second sides with respect to the pivotal axis; and a switch configured to detect that the operation member is moved to a first startup position in a first direction and to detect that the operation member is moved to a second startup position in a second direction opposite the first. The work tool is configured so that the motor is driven in a case where the pivotal movement to the first startup position is detected by the switch, and that the motor is driven in a case where the pivotal movement to the second startup position is detected by the switch.

Abstract: A rotary tool includes a motor having an axis of rotation extending in a forward-rearward direction of the rotary tool. A grip part is located below the axis of rotation in an up-down direction that is perpendicular to the forward-rearward direction. A planet gear is configured to be driven by the motor. An internal gear meshes with the planet gear and is movable in the forward-rearward direction to change a speed. A sun gear meshes with the planet gear, and an output shaft is configured to be rotationally driven by the sun gear. A sensor is configured to detect the forward-rearward movement of the internal gear, the sensor being disposed downward of the sun gear in the up-down direction.