Abstract: Durability deterioration caused by a shock load is effectively reduced. An impact driver includes a motor, a carrier including a reduction assembly and rotatable by the motor, a shaft that receives rotation of the carrier and is rotatable relative to the carrier in an overloaded state, a hammer held by the shaft, and an anvil that is struck by the hammer in a rotation direction.

Abstract: Durability deterioration caused by a shock load is effectively reduced. An impact driver includes a motor, a carrier including a reduction assembly and rotatable by the motor, a shaft that receives rotation of the carrier and is rotatable relative to the carrier in an overloaded state, a hammer held by the shaft, and an anvil that is struck by the hammer in a rotation direction.

Abstract: An electric work machine has less size increase. An electric work machine includes a motor including a stator and a rotor at least partially located radially inward from the stator and rotatable about a rotation axis, a spindle located frontward from the stator in a front-rear direction parallel to the rotation axis and rotatable under a rotational force generated by the rotor, and a spindle bearing supporting a rear portion of the spindle in a rotatable manner. The spindle bearing is located radially inward from the stator.

Abstract: Breakage of a controller in an electric work machine and components around the controller is reduced. The electric work machine includes a motor, a trigger switch operated to activate the motor, a controller that controls the motor, a housing including a grip on which the trigger switch is located and a controller compartment accommodating the controller, and a deformation reducing member located at an interface between the grip and the controller compartment to reduce deformation of the housing.

Abstract: An impact tool includes: a motor; a spindle that includes a spindle shaft and a flange provided at a rear portion of the spindle shaft and that is rotated by a rotational force of the motor; a tool holding shaft at least a part of which is disposed forward of the spindle; a hammer that is supported by the spindle shaft and impacts the tool holding shaft in a rotation direction; and an elastic member disposed between a front surface of the flange and a support surface of the hammer disposed forward of the flange in the axial direction. The elastic member includes a disk spring.

Abstract: An impact tool includes a motor, a spindle configured to rotate by a rotational force of the motor, a tool holding shaft at least a part of which is disposed in front of the spindle, a movable anvil movably supported by the tool holding shaft; and a hammer supported by the spindle and striking the movable anvil in a rotation direction without being displaced in an axial direction.

Abstract: An impact tool includes a motor; a spindle that is rotated by rotational force of the motor; a tool holding shaft at least a part of which is disposed forward of the spindle; a hammer that is supported by the spindle and impacts the tool holding shaft in a rotation direction without being displaced in the axial direction; a hammer case that houses the hammer; and a hammer bearing that is held by the hammer case and supports the hammer in a rotatable manner.

Abstract: A tool-holding apparatus (70) includes an engaging member (71) for engaging a tool accessory (B) and being movably supported in axial and radial directions in a rotational-output shaft (26) having an insertion hole (81) for holding the tool accessory (B). A first biasing member (72) biases the engaging member towards engagement with the engaging member. A bit sleeve (73) is movable in the axial direction along an outer-circumferential surface of the rotational-output shaft between a blocking position at which radial outward movement of the engaging member is blocked and a permitting position at which radial outward movement of the engaging member is permitted. A second biasing member (74) biases the bit sleeve toward the blocking position. A positioning part (75) is fixed on the outer-circumferential surface of the rotational-output shaft and stops the bit sleeve at the blocking position.

Abstract: An electric power tool in one aspect of the present disclosure includes a motor, an impact mechanism, and a control circuit. The control circuit executes a motor control process. The motor control process includes limiting an output of the motor in response to establishment of a preset condition. The preset condition is based on a load applied to the motor.

Abstract: A tool-holding apparatus (70) includes an engaging member (71) for engaging a tool accessory (B) and being movably supported in axial and radial directions in a rotational-output shaft (26) having an insertion hole (81) for holding the tool accessory (B). A first biasing member (72) biases the engaging member towards engagement with the engaging member. A bit sleeve (73) is movable in the axial direction along an outer-circumferential surface of the rotational-output shaft between a blocking position at which radial outward movement of the engaging member is blocked and a permitting position at which radial outward movement of the engaging member is permitted. A second biasing member (74) biases the bit sleeve toward the blocking position. A positioning part (75) is fixed on the outer-circumferential surface of the rotational-output shaft and stops the bit sleeve at the blocking position.

Abstract: An impact driver includes a motor, a spindle, a hammer externally and coaxially mounted on the spindle to receive rotation of the spindle and move relative to the spindle in an axial direction, an anvil in front of the hammer and coaxial with the spindle to be struck by the hammer in a rotation direction, and a hammer case accommodating the spindle, the hammer, and the anvil, allowing a front end of the anvil to protrude frontward from the hammer case, and filled with grease. The spindle includes a grease supply path located in the spindle and open in a sliding surface of the spindle on which the hammer slides to allow grease to be supplied to the sliding surface, and an accelerator in the spindle to accelerate a flow of the grease onto the sliding surface along the grease supply path in response to rotation of the motor.

Abstract: An impact tool has a smaller diameter in its portion around a front end of an anvil. The impact tool includes a motor, a hammer rotatable by the motor, an anvil having a tool hole to receive a tip tool and being strikable by the hammer in a rotation direction and having a ball hole, a ball movable, through the ball hole, between an entered position at which the ball is at least partially inside the tool hole and a retracted position at which the ball is outside the tool hole, and at least one button operable to move the ball radially.

Abstract: A power tool, such as an impact driver, includes a motor having a rotor that rotates relative to a stator, and a centrifugal fan that rotates together with the rotor. A motor housing and a rear housing house the motor. Overlapping parts of the motor housing and the rear housing radially surround an outer circumference of the centrifugal fan. Air exhaust ports are defined in each of the overlapping parts and are offset in an axial direction of the rotor. Fluid communication paths are defined between the air exhaust ports in the overlapping parts. The fluid communication paths have an opening area or width in the axial direction that is smaller than an opening area or width in the axial direction of the air exhaust ports.

Abstract: Durability deterioration caused by a shock load is effectively reduced. An impact driver includes a motor, a carrier including a reduction assembly and rotatable by the motor, a shaft that receives rotation of the carrier and is rotatable relative to the carrier in an overloaded state, a hammer held by the shaft, and an anvil that is struck by the hammer in a rotation direction.

Abstract: An impact tool includes a motor, a first hammer, an anvil, and a second hammer. The first hammer is configured to be rotated by driving of the motor. The anvil is configured to be hammered in a rotation direction by the first hammer. The second hammer is configured to be switchable between a state being linked and a state not being linked to the first hammer. The impact tool ensures selections of a first hammering mode in which only the first hammer hammers the anvil and a second hammering mode in which the first hammer and the second hammer hammer the anvil.

Abstract: An electric working machine in one aspect of the present disclosure includes a motor, a controller, and a setter. The controller is configured to change a rotational state of the motor, in response to an establishment of a condition for change after the motor is initiated, from a low speed rotation to a high speed rotation. The setter is configured to set, based on a situation in the motor in the low speed rotation, a control variable of the motor in the high speed rotation and/or the condition for change.

Abstract: An electric power tool in one aspect of the present disclosure includes a motor, an impact mechanism, and a control circuit. The control circuit executes a motor control process. The motor control process includes limiting an output of the motor in response to establishment of a preset condition. The preset condition is based on a load applied to the motor.

Abstract: Breakage of a controller in an electric work machine and components around the controller is reduced. The electric work machine includes a motor, a trigger switch operated to activate the motor, a controller that controls the motor, a housing including a grip on which the trigger switch is located and a controller compartment accommodating the controller, and a deformation reducing member located at an interface between the grip and the controller compartment to reduce deformation of the housing.

Abstract: A power tool includes a tool-main-body part, an electric motor as a drive source, a grip part, which extends downward from the tool-main-body part and is configured to be gripped by a user, and a power-supply unit at a tip of the grip part. The power tool includes a controller configured to control the operation of the electric motor, the controller being located on the power-supply unit, and a display controlled by the controller and configured to indicate an operating state of the electric motor. The controller and the display each have a flat-plate shape and are disposed along a surface direction with respect to one another, and the display includes a first portion that overlies the controller and a second portion that projects beyond an end edge of the controller.

Abstract: A tool-holding apparatus (70) includes an engaging member (71) for engaging a tool accessory (B) and being movably supported in axial and radial directions in a rotational-output shaft (26) having an insertion hole (81) for holding the tool accessory (B). A first biasing member (72) biases the engaging member towards engagement with the engaging member. A bit sleeve (73) is movable in the axial direction along an outer-circumferential surface of the rotational-output shaft between a blocking position at which radial outward movement of the engaging member is blocked and a permitting position at which radial outward movement of the engaging member is permitted. A second biasing member (74) biases the bit sleeve toward the blocking position. A positioning part (75) is fixed on the outer-circumferential surface of the rotational-output shaft and stops the bit sleeve at the blocking position.