MULTI-STAGE TRANSMISSION FOR VEHICLE

摘要

A multi-stage transmission for a vehicle may include an input shaft, an output shaft, first, second, third, and fourth planetary gear devices disposed between the input shaft and the output shaft to transmit rotary force, each of the first, second, third, and fourth planetary gear devices having three rotary elements, and at least six shifting elements connected to the three rotary elements of the first, second, third, and fourth planetary gear devices,

主权项

1. A multi-stage transmission for a vehicle comprising:
an input shaft; an output shaft; first, second, third, and fourth planetary gear devices disposed between the input shaft and the output shaft to transmit rotary force, each of the first, second, third, and fourth planetary gear devices having three rotary elements; and at least six shifting elements connected to the three rotary elements of the first, second, third, and fourth planetary gear devices, wherein a first rotary element of the first planetary gear device is installed to be fixable by a first shifting element of the at least six shifting elements and selectively connected to a first rotary element of the second planetary gear device, a second rotary element of the first planetary gear device is directly connected to the input shaft and selectively the first rotary element of the second planetary gear device, and a third rotary element of the first planetary gear device is continuously connected to a first rotary element of the third planetary gear device, wherein a second rotary element of the second planetary gear device is selectively connected to each of the first rotary element of the third planetary gear device and a third rotary element of the third planetary gear device, and a third rotary element of the second planetary gear device is continuously connected to a second rotary element of the third planetary gear device, wherein the first rotary element of the third planetary gear device is continuously connected to a first rotary element of the fourth planetary gear device and the second rotary element of the third planetary gear device is continuously connected to a third rotary element of the fourth planetary gear device, and wherein the third rotary element of the fourth planetary gear device is installed to be fixable by a second shifting element of the at least six shifting elements and a second rotary element of the fourth planetary gear device is directly connected to the output shaft.