Power transmitting device

A power transmitting device for a hybrid vehicle having an internal combustion engine and an electric motor, the power transmitting device comprising:

• a first main input shaft, which is disposed parallel to an internal combustion engine output shaft, to which motive power is input from the internal combustion engine, and which is connected to the internal combustion engine output shaft by placing a first make-and-break device in a connected state;
• a second main input shaft, which is disposed coaxially with the first main input shaft and connected to the internal combustion engine output shaft by placing second make-and-break device in a connected state;
• an intermediate input shaft disposed parallel to the first main input shaft;
• a sub input shaft disposed parallel to the intermediate input shaft;
• an output shaft, which is disposed parallel to the first main input shaft and outputs motive power to a driven unit via a counter shaft;
• a first gear group, which is disposed on the first main input shaft and is composed of a plurality of gears selectively connected to the output shaft via a first synchronizer;
• a second gear group, which is disposed on the sub input shaft and is composed of a plurality of gears selectively connecting the sub input shaft to the output shaft via a second synchronizer;
• a third gear group, which is fixed to the output shaft and is composed of a plurality of gears engaged with the gears of the first gear group and the gears of the second gear group in common;
• and
• a differential rotation mechanism composed of a first rotating element, a second rotating element, and a third rotating element so as to be rotatable differentially with respect to one another,
• wherein:
• the first rotating element is connected to the first main input shaft and the electric motor;
• the second rotating element is connected to the first gear group;
• the third rotating element is connected to a fixing mechanism capable of placing the third rotating element in a fixed state;
• and
• the second rotating element decelerates the motive power transmitted from the first rotating element by using a reaction force from the third rotating element, which is placed in the fixed state by the fixing mechanism.