Abstract: An embodiment power train for a vehicle includes a first input shaft configured to receive rotating forces from a first motor and an engine, a second input shaft configured to receive a rotating force from a second motor, an output shaft disposed in parallel with the first input shaft and the second input shaft, a transmission gear set in which a plurality of gear sets having different gear ratios are engaged with and coupled to the first input shaft and the output shaft, a shifting unit configured to select a gear set of the plurality of gear sets based on a traveling speed of the vehicle, and a motor-side transfer gear set engaged with and coupled to the second input shaft and the output shaft.

Abstract: A gear support device of an automatic transmission reduces vibration and noise that are generated in a planetary gear set when power is transmitted from a vehicle driving source. In particular, the gear support device includes a gear support which is disposed on an outer peripheral surface of a hub retainer coupled to a planetary gear set directly connected to an input shaft of a transmission. The gear support rotatably supports the hub retainer by contacting with the outer peripheral surface of the hub retainer at every predetermined interval in a circumferential direction of the hub retainer.

Abstract: A gear support device of an automatic transmission reduces vibration and noise that are generated in a planetary gear set when power is transmitted from a vehicle driving source. In particular, the gear support device includes a gear support which is disposed on an outer peripheral surface of a hub retainer coupled to a planetary gear set directly connected to an input shaft of a transmission. The gear support rotatably supports the hub retainer by contacting with the outer peripheral surface of the hub retainer at every predetermined interval in a circumferential direction of the hub retainer.