Makita Corporation

Yuta Araki

Akira Ito

Hidenori Nagasaka

Motohiro Omura

Koji Takahagi

Tomonori Kawase

Takeshi Kamiya

Manabu Sugimoto

Tomohiko Imae

Jun Ueda

Yukiko Eba

An electric work machine reduces damage to its components under a greater load on a spindle. An electric work machine includes a motor, a planetary gear assembly rotatable with a rotational force from the motor and including a carrier having a hole having an inner surface including two carrier flat surfaces, a spindle including a rear portion received in the hole and having an outer surface including two spindle flat surfaces, and a spindle locking assembly that transmits a rotational force in one direction from the carrier to the spindle and including a lock cam surrounding the spindle frontward from a front surface of the carrier and rotatable together with the spindle, a lock ring surrounding the lock cam, and a plurality of cylindrical members between the lock cam and the lock ring.

Electric work machine

A driver drill allows smooth change of the drive conditions of a motor. The driver drill includes a motor, an output unit located frontward from the motor and rotatable with a rotational force from the motor, a trigger lever operable to activate the motor, a forward-reverse switch lever operable to change a rotation direction of the motor, a first operation member operable to change a drive condition of the motor, a second operation member located upward from the first operation member and operable to change the drive condition of the motor, and a controller that sets the drive condition of the motor in response to an operation on at least one of the first operation member or the second operation member.

Driver drill

A power tool receives a reaction force with an auxiliary handle attached to the power tool. An auxiliary handle attachable to a power tool includes a first arm, a second arm that fastens, together with the first arm, at least a part of the power tool located between the first arm and the second arm, a handle, a grip sensor that detects the handle being gripped with the first arm and the second arm fastening at least the part of the power tool in between, and a signal output unit that outputs, to the power tool, a grip signal indicating that the handle is gripped based on a detection signal from the grip sensor.

Electric power tool and auxiliary handle

An adapter is configured to be removably mounted to a rotary tool, the rotary tool having a battery mounting part configured such that a battery can be removably mounted thereto and an output shaft that is rotationally driven by power supply from the battery mounted to the battery mounting part. The adapter has a housing, a first mounting part that is formed on the housing and configured to be removably mounted to the battery mounting part, a second mounting part that is formed on the housing and configured such that the battery can be removably mounted thereto, and a detection part that is configured to detect the moving state of the adapter in at least one direction.

Adapter and rotary tool

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.

Driver-drill

A driver drill includes a motor housing that holds an electric motor, an axis of rotation of a rotor of the electric motor extending in a front-rear direction of the driver drill, a grip housing having an upper end connected to a lower part of the motor housing and an enlarged-part housing connected to a lower end of the grip housing and spaced from the motor housing in an up-down direction of the driver drill that is perpendicular to the front-rear direction. A torque setting of the driver drill is changeable, and the driver drill is changeable between a setting unlocked state in which the torque setting is changeable and a setting locked state in which the torque setting is not changeable.

Power tool

A driver-drill () includes: a controller (), which stops rotation of a brushless motor () when a torque applied to a spindle () reaches a prescribed clutch-actuation torque; and a dial (), which is capable of specifying, to the controller (), the setting of the prescribed clutch-actuation torque within a prescribed high-low range of values. In the controller (), a relationship between clutch-actuation torques and each value in the high-low range is set such that, in a first range in which the values are low, changes in the clutch-actuation torques are the same in the low-speed mode and in the high-speed mode and such that, in a second range outside of the first range, the clutch-actuation torques in the low-speed mode are higher than in the high-speed mode.

A power tool, such as a hammer driver-drill (), includes: a motor (); a motor housing (A) that holds the motor (); a grip housing (B) connected to the motor housing (A); a battery mount housing or enlarged-part housing (C) connected to the grip housing (B); and a dial () that is provided in the enlarged-part housing (C) such that it is rotatable about a dial shaft (). A threshold for stopping the motor () is settable by rotating the dial ().

A power tool, such as a hammer driver-drill (), includes a spindle () that is axially and rotatable supported inside a metal gear case (). A first cam () is affixed to the spindle so as to rotate therewith and is housed in the gear case (). A second cam () is disposed around spindle such that it is rotatable separately with respect to the spindle and can be brought into contact with the first cam. Hammer-switching levers () are movable relative to the gear case between an advanced position, at which rotation of the second cam is restricted (blocked), and a retracted position, at which the rotational restriction on the second cam is released. Receiving members () are respectively interposed between the gear case and the hammer-switching levers and are configured to absorb vibration generated when a hammering operation is being performed using the power tool.

Growing community of inventors

Anjo, Japan

Yuta Araki