US 12,278,540 B2
Cooling structure of vertical motor
Satoshi Yamada, Saitama (JP)
Assigned to Honda Motor Co., Ltd., Tokyo (JP)
Filed by Honda Motor Co., Ltd., Tokyo (JP)
Filed on Sep. 28, 2022, as Appl. No. 17/955,483.
Prior Publication US 2024/0106299 A1, Mar. 28, 2024
Int. Cl. H02K 9/19 (2006.01); H02K 5/20 (2006.01)
CPC H02K 5/203 (2021.01) [H02K 9/19 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A vertical motor with a cooling structure for an electrical operation machine, comprising:
a driving shaft, having a rotational axis and arranged along a vertical direction;
a rotor, rotating with the driving shaft;
a stator, arranged around the rotor;
a winding, arranged around the stator;
a housing, having a wall portion and a bottom portion and accommodating the driving shaft, the rotor, and the stator; and
an oil sump, provided on the bottom portion of the housing for accumulating a cooling fluid in a manner that a lower portion of the winding is immersed in the cooling fluid,
wherein the oil sump has an inner peripheral side wall,
the inner peripheral side wall is vertically arranged with respect to the bottom portion of the housing and positioned at an inner side than the lower portion of the winding,
wherein the rotational axis of the driving shaft extends in a direction substantially parallel to a direction of gravity.