US 12,136,863 B2
Rotary electric machine and pump
Shigehiro Kataoka, Kanagawa (JP); and Yoshiyuki Kobayashi, Kanagawa (JP)
Assigned to NIDEC TOSOK CORPORATION, Kanagawa (JP)
Filed by NIDEC TOSOK CORPORATION, Kanagawa (JP)
Filed on Mar. 30, 2022, as Appl. No. 17/707,960.
Claims priority of application No. 2021-059571 (JP), filed on Mar. 31, 2021.
Prior Publication US 2022/0320941 A1, Oct. 6, 2022
Int. Cl. H02K 3/52 (2006.01); F04C 2/08 (2006.01)
CPC H02K 3/522 (2013.01) [F04C 2/08 (2013.01); F04C 2240/30 (2013.01); F04C 2240/40 (2013.01); F04C 2240/803 (2013.01); H02K 2203/09 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A rotary electric machine comprising:
a rotor rotatable about a central axis extending in an axial direction;
a stator having a coil and facing the rotor via a gap;
a substrate electrically connected to the coil;
a bus bar assembly having a bus bar electrically connecting the coil and the substrate, and a bus bar holder holding the bus bar;
a housing having a stator housing portion that accommodates the stator therein and a substrate housing portion that accommodates the substrate therein; and
a cover member having a cylindrical portion surrounding an end portion of the stator on one side in an axial direction of the stator,
wherein
the substrate housing portion is located radially outside the stator housing portion,
the housing has a connection hole that connects an inside of the stator housing portion and an inside of the substrate housing portion,
the bus bar assembly is passed through the connection hole in a radial direction, and
the bus bar includes:
a coil connection portion electrically connected to the coil in the stator housing portion; and
a substrate connection portion electrically connected to the substrate in the substrate housing portion,
the bus bar assembly is located on one side in the axial direction of the stator in the stator housing portion,
the stator housing portion has an opening that opens to one side in the axial direction of the stator,
the housing includes a lid member that closes the opening,
the cover member has an opposing portion located on one side in the axial direction of the bus bar assembly in the stator housing portion, and
the opposing portion has a portion that axially positions the bus bar assembly, and
wherein the rotary electric machine further comprises
an elastic member that is located between the lid member and the cover member in the axial direction and applies a force toward the other side in the axial direction of the stator to the cover member.