US 12,081,070 B2
Pump
Yoshiyuki Shizuku, Kanagawa (JP); Shigehiro Kataoka, Kanagawa (JP); Takanobu Yahata, Kanagawa (JP); Thao Lethithanh, Kanagawa (JP); and Nguyen Thi Thanh Tam, Kanagawa (JP)
Assigned to NIDEC TOSOK CORPORATION, Kanagawa (JP)
Filed by NIDEC TOSOK CORPORATION, Kanagawa (JP)
Filed on Jul. 6, 2022, as Appl. No. 17/858,072.
Claims priority of application No. 2021-115272 (JP), filed on Jul. 12, 2021.
Prior Publication US 2023/0012331 A1, Jan. 12, 2023
Int. Cl. F04C 2/10 (2006.01); H02K 1/16 (2006.01); H02K 1/22 (2006.01); H02K 5/08 (2006.01); H02K 7/14 (2006.01)
CPC H02K 1/16 (2013.01) [F04C 2/10 (2013.01); H02K 1/22 (2013.01); H02K 5/08 (2013.01); H02K 7/14 (2013.01); F04C 2240/40 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A pump comprising:
a rotor rotatable about a central axis;
a stator assembly located radially outside the rotor and surrounding the rotor;
a pump unit connected to a first side in an axial direction of the rotor;
a support member including a rotor accommodating portion, the rotor accommodating portion being located radially inside the stator assembly and accommodating the rotor therein; and
a resin housing in which the stator assembly and the support member are molded,
wherein the rotor accommodating portion includes:
a lid portion that covers the rotor from a second side in the axial direction, and
a tubular portion that is located between the rotor and the stator assembly in a radial direction and is open to the first side in the axial direction, and
the stator assembly includes:
a stator core having an annular shape,
a plurality of coils mounted on the stator core, and
a stator cover that covers the plurality of coils, wherein the stator cover includes a pair of cover bodies having an annular shape that cover the coil from the first side in the axial direction and the second side in the axial direction,
a plurality of insulators interposed between the stator core and the plurality of coils, and
each of the cover bodies includes a plurality of claw portions extending toward a stator core side and locked to the insulator
the cover body includes a sealing wall portion arranged between the claw portions in a circumferential direction,
the stator assembly includes the plurality of insulators arranged in the circumferential direction, and
the sealing wall portion covers a space between the insulators adjacent to each other in the circumferential direction from radially outside.