US 11,870,327 B2
Vehicle drive device
Takuya Honjo, Tokyo (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Dec. 22, 2021, as Appl. No. 17/559,508.
Claims priority of application No. 2021-003823 (JP), filed on Jan. 13, 2021.
Prior Publication US 2022/0224200 A1, Jul. 14, 2022
Int. Cl. H02K 9/19 (2006.01); H02K 5/04 (2006.01); H02K 5/22 (2006.01)
CPC H02K 9/19 (2013.01) [H02K 5/04 (2013.01); H02K 5/225 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A vehicle drive device comprising:
a first electric machine;
an electric machine housing accommodating the first electric machine;
a live part that is provided inside the electric machine housing and is electrically connected to the first electric machine; and
a temperature-control circuit for temperature control for the first electric machine, wherein
the temperature-control circuit includes:
a first temperature-control circuit through which a non-conductive first temperature-control medium circulates;
a second temperature-control circuit through which a conductive second temperature-control medium circulates; and
a heat exchanger configured to exchange heat between the first temperature-control medium and the second temperature-control medium,
at least some of the first temperature-control medium passes inside the electric machine housing for the temperature control for the first electric machine,
the first temperature-control circuit includes a dropping pipe that is disposed inside the electric machine housing and above the first electric machine, extends in an axial direction of the first electric machine, and from which the first temperature-control medium drops onto the first electric machine,
the live part is provided on a radially outer side of the first electric machine such that the live part overlaps with the first electric machine in the axial direction of the first electric machine, and
a protection cover including a first protection wall extending in the axial direction of the first electric machine on the radially outer side of the first electric machine and between the first electric machine and the live part is provided inside the electric machine housing.