Power train for vehicle

A power train for a vehicle, the power train comprising:

• 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, wherein the transmission gear set comprises:
• a low gear set engaged with and coupled to the first input shaft and the output shaft;
• and
• a high gear set configured to form a gear ratio that is smaller than a gear ratio of the low gear set and is 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, wherein the shifting unit is fixed to the first input shaft and selectively engaged with an input gear of the low gear set and an input gear of the high gear set;
• and
• a motor-side transfer gear set engaged with and coupled to the second input shaft and the output shaft.

A vehicle comprising:

• a first motor;
• a second motor;
• an engine;
• a first input shaft configured to receive rotating forces from the first motor and the engine, wherein the first motor is directly connected to an end of the first input shaft;
• a second input shaft configured to receive a rotating force from the second motor, wherein the second motor is directly connected to an end of the second input shaft such that the first motor and the second motor are disposed in one direction;
• 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.