US 12,273,012 B2
Drive device
Yuki Ishikawa, Kyoto (JP); Hitoshi Kuroyanagi, Kyoto (JP); Naohiro Wada, Kyoto (JP); Hironobu Kumagai, Kyoto (JP); and Hisashi Fujihara, Kyoto (JP)
Assigned to NIDEC COPORATION, Kyoto (JP)
Appl. No. 17/785,049
Filed by NIDEC CORPORATION, Kyoto (JP)
PCT Filed Nov. 19, 2020, PCT No. PCT/JP2020/043277
§ 371(c)(1), (2) Date Jun. 14, 2022,
PCT Pub. No. WO2021/124792, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 2019-227659 (JP), filed on Dec. 17, 2019.
Prior Publication US 2023/0010604 A1, Jan. 12, 2023
Int. Cl. H02K 7/116 (2006.01); H02K 5/16 (2006.01); H02K 5/20 (2006.01); H02K 7/08 (2006.01); H02K 9/193 (2006.01); H02K 11/33 (2016.01); B60K 1/00 (2006.01)
CPC H02K 7/116 (2013.01) [H02K 5/161 (2013.01); H02K 5/203 (2021.01); H02K 7/083 (2013.01); H02K 9/193 (2013.01); H02K 11/33 (2016.01); B60K 1/00 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A drive device comprising:
a motor having a rotor that rotates about a motor axis extending in a first direction and a stator;
an inverter that supplies power to the motor;
a transmission mechanism that transmits rotation output from the motor to an axle rotating about an output axis; and
a housing that has a motor housing portion that accommodates the motor, an inverter housing portion that accommodates the inverter, and a gear housing portion that accommodates the transmission mechanism, wherein
the motor has a motor side connection portion that protrudes from the stator and is electrically connected to the inverter,
the motor axis and the output axis extend in parallel to each other,
the inverter is located in a second direction orthogonal to the first direction with respect to the motor axis and extends in a third direction orthogonal to the first direction and the second direction,
a virtual straight line passing through the motor axis and the output axis when viewed from the first direction extends in the third direction,
the inverter housing portion overlaps with the motor axis and the output axis when viewed from the second direction,
the inverter housing portion has a boundary wall portion located at a boundary on the virtual straight line side of the inverter housing portion in the second direction,
a distance between the boundary wall portion and the output axis is smaller than a distance between the boundary wall portion and the motor axis in the second direction, and
the motor side connection portion has a portion located closer to a side opposite to the output axis than the motor axis in the third direction.