US 12,323,008 B2
Electric work machine
Kei Kouda, Anjo (JP)
Assigned to MAKITA CORPORATION, Anjo (JP)
Filed by MAKITA CORPORATION, Anjo (JP)
Filed on Oct. 19, 2022, as Appl. No. 17/968,845.
Claims priority of application No. 2021-196448 (JP), filed on Dec. 2, 2021.
Prior Publication US 2023/0179048 A1, Jun. 8, 2023
Int. Cl. H02K 7/08 (2006.01); H02K 1/30 (2006.01); H02K 7/04 (2006.01); H02K 7/14 (2006.01); H02K 9/06 (2006.01); B25B 21/02 (2006.01); B25F 5/00 (2006.01)
CPC H02K 1/30 (2013.01) [H02K 7/04 (2013.01); H02K 7/083 (2013.01); H02K 7/145 (2013.01); H02K 9/06 (2013.01); B25B 21/02 (2013.01); B25F 5/008 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An electric work machine, comprising:
a brushless motor including
a stator, and
a rotor including
a magnet that is cylindrical, and
a magnet holder that is hollow cylindrical or solid cylindrical, the magnet holder having a recess recessed in an axial direction, the magnet holder holding the magnet with the magnet being exposed in a radial direction, the magnet holder having an axial length longer than the magnet and being partially exposed; and
at least one motor bearing supporting the rotor in a rotatable manner, the at least one motor bearing being at least partially received in the recess,
wherein
the magnet holder includes an inner ring holder holding an inner ring in the at least one motor bearing,
the at least one motor bearing includes two motor bearings located across the magnet holder in the axial direction, and
the inner ring holder is located in each of the two motor bearings, and the inner ring holder in one of the two motor bearings and the inner ring holder in another of the two motor bearings have shapes similar to each other.