Patent ID: 7766780

Claim:
A continuously variable transmission using a planetary gear unit, comprising: a drive shaft provided with driving force, and having first and second drive gears which are installed on the drive shaft to be spaced apart from each other; a planetary gear unit including a ring gear meshed with the first drive gear of the drive shaft, a sun gear having an output shaft, and a plurality of planetary gears connecting the ring gear and the sun gear with each other; and a transmission including an input shaft which has an input gear meshed with the second drive gear of the drive shaft, a plurality of cam mechanisms eccentrically secured to the input shaft, a plurality of first links which rotatably receive therein the respective cam mechanisms, a plurality of rotators which are coupled to a one-way clutch installed on a shaft for transmitting output power to the planetary gears, and a plurality of second links which have first ends coupled by pins to respective extensions of the first links and second ends coupled by pins to the respective rotators, wherein additional speed change is enabled through the transmission when driving force provided to the drive shaft is transmitted without loss by the first drive gear.