Drive system for hybrid vehicle

摘要

A drive system for a hybrid vehicle includes an electric motor including a stator and a rotor, an input hub rotatably connected to an engine, an output hub to which the rotor is mounted, a clutch device connecting and disconnecting the input hub to the output hub, a case including a front sidewall portion, a rear sidewall portion and an outer circumferential wall portion connecting an outer circumferential portion of the front sidewall portion to an outer circumferential portion of the rear sidewall portion and housing the electric motor, the input hub, the output hub and the clutch device, a first bearing on which the input hub is journaled, a second bearing on which the output hub is journaled, and a third bearing positioned between the first bearing and the second bearing and relatively rotatably supporting the input hub and the output hub.

主权项

1. A drive system for a hybrid vehicle, comprising:
an electric motor including a stator and a rotor positioned at an inner circumferential portion of the stator to be rotatably relative to the stator; an input hub rotatably connected to an engine; an output hub to which the rotor is mounted; a clutch device connecting and disconnecting the input hub to the output hub; a case including a front sidewall portion, a rear sidewall portion positioned to face the front sidewall portion, and an outer circumferential wall portion connecting an outer circumferential portion of the front sidewall portion to an outer circumferential portion of the rear sidewall portion, the case housing the electric motor, the input hub, the output hub and the clutch device; a first bearing on which the input hub is journaled and mounted to the front sidewall portion; a second bearing on which the output hub is journaled and mounted to the rear sidewall portion; a third bearing positioned between the first bearing and the second bearing relative to a direction of a rotation axis of the input hub and the output hub, the third bearing fitting onto the input hub and the output hub, the third bearing relatively rotatably supporting the input hub and the output hub; a pump wall portion formed at a center of an outer portion of the rear sidewall portion; a casing mounted axially outward of the pump wall portion; an outer rotor housing portion formed between the pump wall portion and the rear sidewall portion; an outer rotor on which inner teeth are formed, being rotatably housed in the outer rotor housing portion; an inner rotor, housed radially inward of the inner teeth, on which outer teeth engaging with the inner teeth are formed, and rotating by a rotation of the output hub; and an oil pump supplying an oil by the rotation of the output hub.