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

Claim 0:
1. 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 knurled surface portion on which a plurality of diamond knurls are formed, at least a subset of the plurality of diamond knurls being at least partially embedded in the electrically insulating member, and
the knurled surface portion has an axial length greater than an axial length of the stator core.