US 12,273,005 B2
Rotary electric machine
Yasuhiro Kawamura, Saitama (JP); Yukihiro Wakihata, Saitama (JP); Hiroki Tanaka, Saitama (JP); and Koshiro Baba, Saitama (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Jan. 20, 2023, as Appl. No. 18/099,647.
Claims priority of application No. 2022-008959 (JP), filed on Jan. 24, 2022.
Prior Publication US 2023/0238852 A1, Jul. 27, 2023
Int. Cl. H02K 5/16 (2006.01); H02K 5/173 (2006.01); H02K 5/20 (2006.01); H02K 7/08 (2006.01); H02K 9/197 (2006.01); H02K 11/01 (2016.01); H02K 11/225 (2016.01); H02K 24/00 (2006.01)
CPC H02K 5/1732 (2013.01) [H02K 5/203 (2021.01); H02K 7/083 (2013.01); H02K 9/197 (2013.01); H02K 11/225 (2016.01); H02K 24/00 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A rotary electric machine comprising:
a rotor shaft;
a rotor attached to the rotor shaft;
a stator; and
a case that houses the rotor and the stator, wherein
one end side and an other end side of the rotor shaft in an axial direction are respectively supported by the case via bearings with the rotor interposed therebetween,
the bearings electrically insulate the rotor shaft and the case from each other,
the case includes:
a rotor housing space that houses the rotor and the stator; and
bearing housing spaces in which the bearings are disposed,
the rotor housing space and the bearing housing spaces are liquid-tightly sealed to each other by first seal mechanisms,
the bearing is lubricated by a liquid medium supplied to the bearing housing space, and
the rotor housing space is configured such that no liquid medium is supplied to the rotor housing space.