US 12,308,728 B2
Electric work machine
Fuminari Fujii, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Nov. 7, 2022, as Appl. No. 17/981,793.
Claims priority of application No. 2021-214868 (JP), filed on Dec. 28, 2021.
Prior Publication US 2023/0208252 A1, Jun. 29, 2023
Int. Cl. H02K 9/06 (2006.01); H02K 9/28 (2006.01); B27B 17/02 (2006.01); B27B 17/08 (2006.01); H02K 5/08 (2006.01)
CPC H02K 9/06 (2013.01) [H02K 9/28 (2013.01); B25D 2250/095 (2013.01); B27B 17/02 (2013.01); B27B 17/08 (2013.01); H02K 5/08 (2013.01)] 15 Claims
OG exemplary drawing
 
1. An electric work machine, comprising:
a motor including
a stator,
a rotor rotatable relative to the stator, and
a rotor shaft fixed to the rotor;
an output unit drivable by the rotor shaft;
a plurality of heat-radiating fins;
a motor case having an outer surface receiving the plurality of heat-radiating fins, the motor case accommodating the stator and the rotor;
a cooling fan located outside the motor case and rotatable by the rotor shaft; and
a duct including a guide to guide air through the cooling fan to a fin passage between adjacent heat-radiating fins of the plurality of heat-radiating fins,
wherein the guide includes
a cover facing radially outer ends of the plurality of heat-radiating fins and covering the fin passage, and
a direction converter located radially outward from the cooling fan and configured to supply air from the cooling fan to the cover.