Makita Corporation

Keita Mizukoshi

Mitsuo Suenaga

A brushless motor () includes: a rotor (), which rotates about a rotational axis (AX); and a stator (), which is disposed around the rotor and comprises one or more coils (). The rotor comprises a rotor core () and a rotor shaft (), which is disposed in a shaft hole () of the rotor core. The rotor shaft includes: a thinner-diameter force-fitting segment (), which is force-fit into the shaft hole with a first amount of force-fitting interference; and a thicker-diameter force-fitting segment (), which is disposed at a location different from that of the thinner-diameter force-fitting segment in a front-rear direction parallel to the rotational axis and which is force-fit into the shaft hole with a second amount of force-fitting interference that is larger than the first amount of force-fitting interference.

Growing community of inventors

Anjo, Japan

Keita Mizukoshi