| 摘要 |
PURPOSE:To aim at reduction of both decrease in the life-time of conical rotors, and decrease in the efficiency of a transmission even in the range of a high- speed rotation in the case of a frictional continuously variable transmission suitable for vehicles, machinery and the like by causing a plurality of specified conical rotors, which make a planetary movement, to be utilized as a medium of transmission. CONSTITUTION:Between an input shaft 1 and an output shaft 2, which are placed on the same axis, is provided a frictional gearing mechanism. The frictional gearing mechanism is provided with a plurality of conical rotors 3, and then, on each of the conical rotors 3 are provided a small friction gear 4, a large friction gear 5 and a gear shifting ring 6. In the case of these conical rotors 3, if the radius of a conical rotor which comes in contact with a large friction gear is represented by b, the radius of a gear shifting ring which comes in contact with a conical rotor, by c, the radius of a large friction gear which comes in contact with a conical rotor, by d, the radius of a conical rotor which comes in contact with a small friction gear, by e, and the radius of a small friction gear which comes in contact with a conical rotor, by f, then, de/bf=0.3-0.7, where, 1<c/d<1.1.
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