| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving force transmission device capable of inhibiting the reduction of motor torque that is caused by heat generated by an electric motor.SOLUTION: A driving force transmission device 1 includes: a multiple disc clutch 8 which is disposed between a housing 12 and an inner shaft 13 and intermittently connects the housing 12 with the inner shaft 13; a cam mechanism 9 which converts a motor driving force a into a cam thrust force F which becomes a clutch operation force of the multiple disc clutch 8; and a cooling mechanism A for cooling the electric motor 35 that provides the motor driving force a to the cam mechanism 9. The cooling mechanism A includes a cooling pump 33 which is operated by relative rotations between a propeller shaft 2 and the vehicle body side. |
