Patent ID: 9482319
Filing Date: 2016-11-01
CPC Classification: F16H

Claim Text:
1. A multi-stage transmission for a vehicle, comprising: an input shaft and an output shaft; a first planetary gear device, a second planetary gear device, a third planetary gear device, and a fourth planetary gear device provided between the input shaft and the output shaft to transfer a torque and each including three rotating elements; and at least six shifting elements connected to the rotating elements of the first to fourth planetary gear devices, wherein a first rotating element of the first planetary gear device is selectively connected to each of a second rotating element and a third rotating element of the second planetary gear device, a second rotating element of the first planetary gear device is continuously connected to a second rotating element of the third planetary gear device, and a third rotating element of the first planetary gear device is selectively connected to each of a first rotating element of the second planetary gear device and a third rotating element of the third planetary gear device and the third rotating element of the first planetary gear device is selectively fixable to a transmission case by one of the at least six shifting elements, the second rotating element of the second planetary gear device is continuously connected to the input shaft, and the third rotating element of the second planetary gear device is continuously connected to a first rotating element of the third planetary gear device, the first rotating element of the third planetary gear device is continuously connected to a first rotating element of the fourth planetary gear device, and the second rotating element of the third planetary gear device is continuously connected to a third rotating element of the fourth planetary gear device, and the first rotating element of the fourth planetary gear device is selectively fixable to the transmission case by another of the at least six shifting elements, and a second rotating element of the fourth planetary gear device is continuously connected to the output shaft.