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US 12,476,516 B2Granted
Brushless motor, electric work machine, and brushless-motor manufacturing method
AssigneeMakita Corporation
InventorsMitsuo Suenaga, Keita Mizukoshi
Life of this patent
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AssigneeMakita Corporation
InventorsMitsuo Suenaga, Keita Mizukoshi
Estimating the term…
A brushless motor (6) includes: a rotor (25), which rotates about a rotational axis (AX); and a stator (24), which is disposed around the rotor and comprises one or more coils (29). The rotor comprises a rotor core (31) and a rotor shaft (33), which is disposed in a shaft hole (60) of the rotor core. The rotor shaft includes: a thinner-diameter force-fitting segment (82), which is force-fit into the shaft hole with a first amount of force-fitting interference; and a thicker-diameter force-fitting segment (79), 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.
A brushless motor comprising:
A method of manufacturing a brushless motor comprising a rotor configured to be rotatable about a rotational axis and comprising a rotor shaft and a rotor core, and a stator disposed around the rotor and comprising one or more coils, the method comprising:
Dependencies are inferred from the claim text.