Patent ID: 7364526

Claim:
A gear train comprising: an input shaft for receiving engine power; a single planetary gear part including a first sun gear coupled with the input shaft, a plurality of first planetary gears meshed with the first sun gear, and a first ring gear meshed with the first planetary gears; a double planetary gear part including a second sun gear, a plurality of second planetary gears meshed with the second sun gear, formed integrally and in alignment with the first planetary gears and having diameters different from diameters of the first planetary gears, a plurality of third planetary gears meshed with the second planetary gears, and a second ring gear meshed with the third planetary gears while accommodating the third planetary gears therein; a planet carrier for rotatably supporting the first to third planetary gears; a first brake for selectively stopping the rotation of the first ring gear; a second brake for selectively stopping the rotation of the second ring gear; an output shaft selectively coupled with the planet carrier and/or the second sun gear; a first clutch for coupling/decoupling the planet carrier with/from the output shaft; and a second clutch for coupling/decoupling the second sun gear with/from the output shaft.