Invention Grant
- Patent Title: Electric work machine
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Application No.: US16567303Application Date: 2019-09-11
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Publication No.: US11462967B2Publication Date: 2022-10-04
- Inventor: Kei Kouda , Hideki Abe
- Applicant: MAKITA CORPORATION
- Applicant Address: JP Anjo
- Assignee: MAKITA CORPORATION
- Current Assignee: MAKITA CORPORATION
- Current Assignee Address: JP Anjo
- Agency: J-Tek Law PLLC
- Agent Jeffrey D. Tekanic; Scott T. Wakeman
- Priority: JPJP2018-190305 20181005
- Main IPC: H02K7/00
- IPC: H02K7/00 ; H02K5/08 ; H02K5/16 ; H02K21/16 ; A01D34/78 ; H02K7/08 ; F16C3/02 ; A01D101/00

Abstract:
An electric work machine, such as a lawn mower includes a motor case (22) fixed inside a main-body housing (10). A brushless motor (21) is housed inside the motor case (22) and includes a stator (23) having a stator core (40), coils (45), and upper and lower insulators (42, 43), and a rotor (24) disposed inward of the stator (23) and having a rotary shaft (25). A spindle (17) is driven by the rotary shaft (25). The motor case (22) holds the stator (23) and axially supports the rotary shaft (25) via bearings (68, 76). One or more insulating members, such as an insulating cap (67) and/or a resin layer (78), provide electrical insulation between the stator core (40) and the rotary shaft (25).
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