POWER TRANSMISSION DEVICE

PROBLEM TO BE SOLVED: To provide a power transmission device of such constitution that a degree of freedom in setting a speed change ratio is high, that a degree of freedom in setting a position of a shaft is high, and that compactness can be easily achieved. SOLUTION: This power transmission device is provided with a belt type continuously variable transmission mechanism CVT and a stepped rotation transmitting mechanism GT to transmit rotation drive force of a primary shaft 1 driven to rotate by an engine to be speed-changed and transmitted to a counter shaft 3. The continuously variable transmission mechanism is composed of a drive pulley 10, a driven pulley 15, and a V-belt 14. The stepped rotation transmitting mechanism GT comprises a forward gear train to transmit rotation of an input drive gear 31 on the primary shaft 1 through an idler gear 32 to a low driven gear 33 on a secondary shaft 2, a forward output transmission gear train to transmit rotation of the secondary shaft 2 to a counter shaft 3, and a reverse gear train to transmit rotation of the input drive gear 31 through the idler gear 32 to a reverse driven gear 36 on the counter shaft 3. COPYRIGHT: (C)2004,JPO&NCIPI