Power system

A power system comprising:

• an electric motor that drives a left wheel and a right wheel of a vehicle;
• a transmission that is disposed on power transmission paths between the electric motor and the left wheel and between the electric motor and the right wheel;
• and
• a differential gear system that distributes output power shifted by the transmission to the left wheel and the right wheel, wherein
• the transmission comprises:
• a first gear that is mechanically connected to the electric motor;
• a second gear that has a rotation axis in common with the first gear and is mechanically connected to a differential gear casing of the differential gear system;
• a pinion gear that meshes with the first gear and the second gear;
• and
• a pinion holder that rotatably supports the pinion gear,
• the pinion holder has a pinion gear supporting portion which is disposed on a side of the differential gear casing of the differential gear system to support the pinion gear, relative to a meshing portion between the second gear and the pinion gear,
• a first end portion of the pinion gear is supported by a partition wall, and a second end portion of the pinion gear which is opposite to the first end portion is supported by the pinion gear supporting portion of the pinion holder, across the meshing portion, and
• the second gear comprises:
• a connecting portion which is connected to the differential gear casing of the differential gear system on a first side of the pinion gear supporting portion;
• and
• a gear portion which meshes with the pinion gear on a second side of the pinion gear supporting portion which is opposite to the first side.