Koki Holdings Co., Ltd.

Daijiro Tanabe

Kuniaki Kanbe

Atsuyuki Kikuchi

Shinichirou Satou

Hideyuki Hashimoto

Shingo Yamazaki

Satoshi Abe

Takahiro Ookubo

Goya Fujimoto

Takehiro Ookubo

Ryusuke Kobayashi

The disclosure provides a work tool having an electric motor, a power transmission means that receives motive power from the electric motor and transmits the motive power to a tip tool, a gear housing for accommodating at least a portion of the power transmission means, weights swingably supported on the gear housing, and coil springs that function as an urging means for urging the weights such that the weights are located at an initial neutral position, wherein the weights and the coil springs are provided respectively on the two sides of the gear housing so as to put the power transmission means therebetween, and a rotational support axle is provided that functions as a connecting means for connecting the weights provided on both sides of the gear housing so as to connect the weights such that the weights swing integrally.

Work tool

An electric power tool has a brushless motor for driving a tip tool, and a motor case is at least partly covered by a motor housing made of aluminum alloy and exposed to an outside. A control board provided with a control circuit for controlling the rotation of the brushless motor is disposed adjacent to the motor housing. The brushless motor and a control board are cooled by cooling air generated by a fun, thereby enhancing the cooling characteristics of the motor control circuit.

Power-actuated tool

Growing community of inventors

Ibaraki, Japan

Daijiro Tanabe