Vehicle drive device

A vehicle drive device comprising:

• a rotary electric machine including a stator and a rotor;
• a transmission configured to change a speed of rotation transmitted from the rotor;
• a differential gear device configured to distribute, to a pair of wheels provided on a vehicle, a driving force from the rotary electric machine transmitted via the transmission;
• and
• a case that houses the rotary electric machine, the transmission, and the differential gear device, wherein
• the rotary electric machine, the transmission, and the differential gear device are disposed coaxially,
• the transmission includes:
• a first pinion gear,
• a second pinion gear,
• a sun gear that is connected to the rotor so as to rotate integrally with the rotor,
• a first ring gear, the first pinion gear meshing with the sun gear and the first ring gear,
• a second ring gear, the second pinion gear having a smaller diameter than the first pinion gear and meshing with the second ring gear, and
• a carrier that rotatably supports the first pinion gear and the second pinion gear that is connected to the first pinion gear so as to rotate integrally with the first pinion gear,
• a direction along a rotation axis of the rotor is an axial direction,
• the case includes a first case member that is a stator support portion that supports the stator, a second case member that is structured as a separate member from the first case member and forms a gear chamber that houses the transmission and the differential gear device, and a support member that supports the first ring gear in the axial direction and is engaged with the first ring gear so as not to be rotatable relative to the first ring gear,
• a side where the first case member is disposed with respect to the second case member in the axial direction is a first axial side, and a side opposite to the first axial side is a second axial side,
• the second ring gear is disposed on the second axial side of the first ring gear, and
• the support member rotatably supports the rotor via a rotor bearing, and is fixed to the second case member.