| 摘要 |
A continuously variable transmission having high efficiency is provided to reduce the fabrication cost and simplify the structure by jointing the necessary element for the mode preferences to the planetary gear system. A continuously variable transmission comprises the belt speed change part(30), the connection gear system(40), the planetary gear system(50), and the mode selection part(60). The belt speed change part changes the gear ratio of the first power which corresponds to the driving resistance of the output axis(71) when the first power generated in a boiler is inputted through the first input shaft(31) and is inputted without notice. The planetary gear system changes the first power inputted to the sun gear through the first input shaft. The planetary gear system mixes the second power which is inputted to the ring gear(54) with the carrier(55) and delivers to the output shaft.
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