POWER TRANSMISSION DEVICE

摘要

PROBLEM TO BE SOLVED: To reduce an input-side inertia loss when bringing a sub clutch device into a disengaging state in a power transmission device with the sub clutch device and a main clutch device. SOLUTION: This power transmission device 10 has the sub clutch device 20 disposed between an input shaft 11 and a middle rotor 21, the main clutch device 30 disposed between the middle rotor 21 and an output shaft 12, and a cam device 40 converting friction engagement force of the sub clutch device 20 into pressing force for the main clutch device 30.