US 12,088,175 B2
Electric pump
Tomohiro Sakata, Kanagawa (JP); and Shigehiro Kataoka, Kanagawa (JP)
Assigned to NIDEC TOSOK CORPORATION, Kanagawa (JP)
Filed by NIDEC TOSOK CORPORATION, Kanagawa (JP)
Filed on Jun. 24, 2022, as Appl. No. 17/848,402.
Claims priority of application No. 2021-105534 (JP), filed on Jun. 25, 2021.
Prior Publication US 2022/0416617 A1, Dec. 29, 2022
Int. Cl. H02K 11/33 (2016.01); H02K 3/52 (2006.01); H02K 5/22 (2006.01); H02K 7/14 (2006.01); H02K 11/38 (2016.01)
CPC H02K 5/225 (2013.01) [H02K 7/14 (2013.01); H02K 11/33 (2016.01); H02K 3/522 (2013.01); H02K 11/38 (2016.01); H02K 2203/03 (2013.01); H02K 2213/03 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An electric pump comprising:
a motor including a rotor portion rotatable about a central axis extending in an axial direction and a stator portion around which a coil wire is wound;
a pump mechanism connected to the rotor portion;
a circuit board provided on a first side in the axial direction of the motor; and
a coil guide that is arranged between the motor and the circuit board and guides the coil wire,
wherein the coil wire extends to the first side in the axial direction and is connected to the circuit board,
the coil guide includes:
a first coil guide portion that guides the coil wire along the axial direction; and
a second coil guide portion which is provided on a facing surface facing the motor and in which the first coil guide portion is opened,
the second coil guide portion is an inclined surface inclined to the first side in the axial direction toward an opening portion of the first coil guide portion, and
a width of the second coil guide portion as viewed from the axial direction decreases toward the opening portion of the first coil guide portion.