Patent ID: 11863047
Assignee: MAKITA CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  A  F | IPC A  F  H

Claim 14:
15. An electric work machine comprising:
a stator including a stator core, an insulator supported by the stator core, and a plurality of coils supported by the insulator;
a rotor that is rotatable relative to the stator, the rotor including a rotor core, at least one permanent magnet supported by the rotor core, and an electrically insulating member fixed to the rotor core;
a rotary shaft extending into the electrically insulating member; and
an output part driven by the rotary shaft,
wherein:
the rotary shaft includes a plurality of diamond knurls at least partially embedded in the electrically insulating member,
at least a portion of the electrically insulating member is located outside the rotor core, and
at least some of the plurality of diamond knurls are embedded in the portion of the electrically insulating member.