Abstract: A rotor of a rotary electric machine includes a rotor core, magnets, and a rotor shaft. The rotor shaft includes a refrigerant passage, a refrigerant supply part provided on one side of the refrigerant passage and configured to supply the refrigerant from the rotor shaft to the rotor core, a refrigerant discharge part provided on the other side of the refrigerant passage and configured to return the refrigerant from the rotor core to the rotor shaft, and a passage partition part configured to block flow of the refrigerant between the one side and the other side of the refrigerant passage. The rotor core includes a plurality of heat exchange chambers having a circumferential length larger than a radial length, and the heat exchange chamber communicates with the refrigerant supply part on one side of the refrigerant passage and communicates with the refrigerant discharge part on the other side.

Abstract: In a support structure of a power system, the power system includes: an electrical motor; a transmission; and a housing supported by a frame member of the vehicle via a mount arm. The transmission includes a first planetary mechanism having first to third rotating elements, the electrical motor is connected to the first rotating element of the first planetary mechanism, the left and right wheels are connected to the second rotating element of the first planetary mechanism, and the housing is connected to the third rotating element of the first planetary mechanism. A fastening member that fastens the housing and the mount arm is disposed so as to overlap in the axial direction with a connecting portion that connects the third rotating element of the first planetary mechanism and the housing.

Abstract: A rotor of a rotary electric machine includes a rotor core, magnets, and a rotor shaft. The rotor shaft includes a refrigerant passage, a refrigerant supply part provided on one side of the refrigerant passage and configured to supply the refrigerant from the rotor shaft to the rotor core, a refrigerant discharge part provided on the other side of the refrigerant passage and configured to return the refrigerant from the rotor core to the rotor shaft, and a passage partition part configured to block flow of the refrigerant between the one side and the other side of the refrigerant passage. The rotor core includes a plurality of heat exchange chambers having a circumferential length larger than a radial length, and the heat exchange chamber communicates with the refrigerant supply part on one side of the refrigerant passage and communicates with the refrigerant discharge part on the other side.

Abstract: In a support structure of a power system, the power system includes: an electrical motor; a transmission; and a housing supported by a frame member of the vehicle via a mount arm. The transmission includes a first planetary mechanism having first to third rotating elements, the electrical motor is connected to the first rotating element of the first planetary mechanism, the left and right wheels are connected to the second rotating element of the first planetary mechanism, and the housing is connected to the third rotating element of the first planetary mechanism. A fastening member that fastens the housing and the mount arm is disposed so as to overlap in the axial direction with a connecting portion that connects the third rotating element of the first planetary mechanism and the housing.

Abstract: A differential device includes a ring gear having a center axis of the ring gear. A pinion shaft is provided in the ring gear such that a shaft axis of the pinion shaft is substantially perpendicular to the center axis and substantially coaxial with a diameter of the ring gear. The pinion shaft is rotatable together with the ring gear around the center axis. A first attaching member is connected to the ring gear and has a first fitting hole into which a first end portion of the pinion shaft is fitted. A second attaching member is connected to the ring gear and has a second fitting hole into which a second end portion of the pinion shaft is fitted.