Power transmission device
A power transmission device includes a pinion gear having a large pinion gear and a small pinion gear, a carrier that supports the pinion gear, a ring gear that engages with the small pinion gear, an oil supply unit positioned above a horizontal line that passes through a revolution center of the pinion gear, and a downstream side wall part facing a gear surface of the large pinion gear. The downstream side wall part is arranged to be adjacent to the oil supply unit further downstream in a revolution direction of the pinion gear than the oil supply unit when viewed from an axial direction.
1. A power transmission device comprising:
a pinion gear having a large pinion gear and a small pinion gear;
a carrier that supports the pinion gear;
a ring gear that engages with the small pinion gear;
an oil supply unit positioned above a horizontal line that passes through a revolution center of the pinion gear; and
a downstream side wall part facing a gear surface of the large pinion gear, wherein
the downstream side wall part is arranged to be adjacent to the oil supply unit further downstream in a revolution direction of the pinion gear than the oil supply unit when viewed from an axial direction.
2. The power transmission device according to claim 1 , further comprising
an upstream side wall part facing the gear surface of the large pinion gear, wherein
the upstream side wall part is positioned above the horizontal line that passes through the revolution center of the pinion gear, and
when seen from the axial direction, the upstream side wall part is positioned further upstream in the revolution direction of the pinion gear than the oil supply unit.
3. The power transmission device according to claim 2 , further comprising
a plate facing the large pinion gear in the axial direction, wherein
the plate is fixed to the downstream side wall part.
4. The power transmission device according to claim 3 , further comprising
a motor arranged upstream of a sun gear that engages with the large pinion gear, and
a drive shaft arranged downstream of the carrier, wherein
the drive shaft penetrates inner circumferences of the sun gear and the motor.
5. The power transmission device according to claim 1 , further comprising
a plate facing the large pinion gear in the axial direction, wherein
the plate is fixed to the downstream side wall part.
6. The power transmission device according to claim 1 , further comprising
a motor arranged upstream of a sun gear that engages with the large pinion gear, and
a drive shaft arranged downstream of the carrier, wherein
the drive shaft penetrates inner circumferences of the sun gear and the motor.