| 摘要 |
PURPOSE:To simplify the cooling system by cooling body a motor coil and its transmission mechanism simultaneously with cooling air generated by a cooling fan installed on a rotatary shaft of a motor in a power unit to rotate driving wheels through the motor and the transmission system in a transmission case pivoted on a vehicle body so as to swing freely. CONSTITUTION:A power unit P is constituted in such a way that the front edge of the swing type power unit P on which shaft rear wheels Wr are mounted in the rear ends is supported in the rear part of the center frame with a pivot 5 so as to swing freely in the vertical direction and a motor M arranged in the front part and a speed reducer 14 in the rear part in a transmission case 13 are connected to each other through a belt type continuous variable transmission (C.V.T.). In such motorcycle V, a cooling fan 22 is arranged on a rotatary shaft 19 of the motor M so as to be adjacent to the left edge wall part 162 of a motor housing 16 and a cup shape air inducing room 25 is fastened jointly to the right side of the motor housing 16 with bolts. And after having cooled a driver 43, the motor M and the belt type C.V.T. with air induced by the rotation of the cooling fan 22, the air is exhausted outside from an exhaust port 133. |
