US 11,843,307 B2
Motor and motor assembly
Hideki Nishimura, Kyoto (JP); Tomohiro Hasegawa, Kyoto (JP); Hiroaki Hirano, Kyoto (JP); and Yoichi Sekii, Kyoto (JP)
Assigned to NIDEC CORPORATION, Kyoto (JP)
Filed by Nidec Corporation, Kyoto (JP)
Filed on Jun. 1, 2021, as Appl. No. 17/335,361.
Claims priority of application No. 2020-096424 (JP), filed on Jun. 2, 2020.
Prior Publication US 2021/0376693 A1, Dec. 2, 2021
Int. Cl. H02K 5/173 (2006.01); H02K 7/116 (2006.01); H02K 21/22 (2006.01); H02K 7/08 (2006.01); F16H 1/16 (2006.01); F16H 55/22 (2006.01)
CPC H02K 7/1166 (2013.01) [H02K 5/1737 (2013.01); H02K 7/088 (2013.01); H02K 21/22 (2013.01); F16H 1/16 (2013.01); F16H 55/22 (2013.01)] 20 Claims
OG exemplary drawing
 
11. A motor, comprising:
a stator that includes a shaft extending in a vertical direction;
a rotor that is rotatable around the shaft; and
a bearing that supports the rotor in a rotatable manner; wherein
the rotor includes:
a magnet that is radially outward of the stator and that opposes the stator in a radial direction;
a case that covers a radially outer end of the magnet; and
a tooth groove that is provided in a radially outer surface of the case;
the case includes:
a first region in which the tooth groove is in the radially outer surface; and
a second region on an end side of the case in the axial direction with respect to the first region in the axial direction;
the motor includes a plurality of the bearings, and in at least one of the plurality of the bearings, a portion of a radially outer end of the at least one of the plurality of the bearings overlapping the second region as viewed in the radial direction is located radially outward of the radially inner end of the case in the first region; and
a radially outer end of the second region is located radially outward of a radially outer end of the first region.