US 12,448,972 B2
Electric oil pump
Naotsugu Kitayama, Shizuoka (JP); Masahiro Kawai, Shizuoka (JP); and Kenji Mizushiri, Shizuoka (JP)
Assigned to NTN CORPORATION, Osaka (JP)
Appl. No. 18/031,502
Filed by NTN Corporation, Osaka (JP)
PCT Filed Oct. 6, 2021, PCT No. PCT/JP2021/037041
§ 371(c)(1), (2) Date Apr. 12, 2023,
PCT Pub. No. WO2022/085457, PCT Pub. Date Apr. 28, 2022.
Claims priority of application No. 2020-175370 (JP), filed on Oct. 19, 2020; and application No. 2021-050541 (JP), filed on Mar. 24, 2021.
Prior Publication US 2023/0374993 A1, Nov. 23, 2023
Int. Cl. F04D 13/06 (2006.01); F04D 25/06 (2006.01); H02K 5/22 (2006.01)
CPC F04D 13/0686 (2013.01) [F04D 13/06 (2013.01); F04D 25/068 (2013.01); H02K 5/225 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An electric oil pump comprising:
a pump unit that generates hydraulic pressure;
a motor unit that drives the pump unit;
a substrate on which a control circuit for controlling the motor unit is formed by a plurality of electronic components; and
a housing equipped with a pump accommodation unit that houses the pump unit, a motor accommodation unit that houses the motor unit, and a substrate accommodation unit that houses the substrate,
wherein the substrate is disposed along a tangential direction of a circle about an axis of the motor unit,
wherein the pump accommodation unit, the motor accommodation unit, and the substrate accommodation unit are integrally formed,
wherein the pump unit and the motor unit are axially aligned, and the substrate is disposed so as to straddle the pump unit and the motor unit,
wherein an outer peripheral surface of the pump accommodation unit and an outer peripheral surface of the motor accommodation unit are provided on a bottom surface of the substrate accommodation unit, and
wherein the outer peripheral surface of the pump accommodation unit is disposed closer to the axis of the motor unit than the outer peripheral surface of the motor accommodation unit.