US 11,670,981 B2
Motor with a refrigerant supply groove in a housing
Wonjung Sung, Seoul (KR); Jaemin Kim, Seoul (KR); Gyeongjae Park, Seoul (KR); and Jeongmin Lee, Seoul (KR)
Assigned to LG MAGNA E-POWERTRAIN CO., LTD., Incheon (KR)
Filed by LG Magna e-Powertrain Co., Ltd.
Filed on Dec. 28, 2020, as Appl. No. 17/135,276.
Claims priority of application No. 10-2020-0040992 (KR), filed on Apr. 3, 2020.
Prior Publication US 2021/0313858 A1, Oct. 7, 2021
Int. Cl. H02K 5/20 (2006.01); H02K 9/193 (2006.01); H02K 1/20 (2006.01)
CPC H02K 5/203 (2021.01) [H02K 9/193 (2013.01); H02K 1/20 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A motor, comprising:
a housing comprising an accommodation space and a refrigerant supply hole formed in a radial direction through an outer circumferential surface of the housing;
a stator core disposed in the accommodation space and coupled to an inner circumferential surface of the housing;
stator coils wound around the stator core;
a rotor core rotatably disposed in the accommodation space and spaced apart from an inner circumferential surface of the stator core by a predetermined distance;
a shaft coupled to a central portion of the rotor core; and
a refrigerant supply groove formed as a recess in a portion of the inner circumferential surface of the housing adjacent to a location where the inner circumferential surface of the housing is coupled to the stator core, the refrigerant supply groove comprising:
a main groove configured to communicate with the refrigerant supply hole and extending in a circumferential direction of the stator core; and
a plurality of branched grooves extending in an axial direction from both sides of the main groove,
wherein the branched grooves are formed in the axial direction of the stator core,
wherein the main groove has a predetermined width in the axial direction, and
wherein the main groove comprises a portion in which the branched grooves are connected in the axial direction, the portion comprising a bottleneck portion having a narrower width.