Patent ID: 8371979

Claim:
A range-changing transmission unit, comprising an input and an output, with a continuously variable transmission part and a mechanical transmission part, wherein the mechanical transmission part comprises a four-shaft planetary gear having a first planetary gear set and a second planetary gear set, each of the first and second planetary gear sets has a plurality of planetary gears, wherein one of said first and second planetary gear sets does not contain a sun gear, the four-shaft planetary gear is selectively connected to the output through one of a first clutch device and a second clutch device, wherein the continuously variable transmission part is connected between the mechanical transmission part and the output through an input part of the second clutch device, wherein the first planetary gear set and the second planetary gear set of the planetary gear each comprise a first shaft and a second shaft, wherein the first shafts of the first planetary gear set and the second planetary gear set are formed by a flange of the planetary gear sets and the planetary gears of each planetary gear set are connected in a rotationally fixed manner, wherein the first shafts are rotationally fixed to each other and connected at least indirectly to the transmission input, the second shaft of the first planetary gear set is connected to the continuously variable transmission part, the second shaft of the second planetary gear set is connected to an input part of the first clutch device, and the first planetary gear set comprises a third shaft which is connected to the continuously variable transmission part, wherein the third shaft is selectively connected to the output via the second clutch device.