Gear train of automatic transmission for vehicle

摘要

A gear train may include an input shaft adapted to receive torque of an engine, an output shaft adapted to output changed torque, a first planetary gear set including a first sun gear, a first planet carrier, and a first ring gear as rotation elements thereof, a second planetary gear set including a second sun gear, a second planet carrier, and a second ring gear as rotation elements thereof, and a third planetary gear set including a third sun gear, a third planet carrier, and a third ring gear as rotation elements thereof.

主权项

1. A gear train apparatus of an automatic transmission for a vehicle comprising:
an input shaft receiving a torque of an engine; an output shaft outputting a changed torque; a first planetary gear set including first, second, and third rotation elements and disposed on the input shaft; a second planetary gear set including fourth, fifth, and sixth rotation elements and disposed on the input shaft; a third planetary gear set including seventh, eighth, and ninth rotation elements and disposed on the input shaft; a first rotation shaft directly connecting the first rotation element with a transmission housing; a second rotation shaft directly connecting the third rotation element with the fourth rotation element; a third rotation shaft directly connecting the second rotation element with the input shaft; a fourth rotation shaft directly connecting the ninth rotation element with the output shaft; a fifth rotation shaft directly connecting the fifth rotation element with the eighth rotation element and selectively connected to the input shaft or the transmission housing; a sixth rotation shaft connected to the sixth rotation element; and a seventh rotation shaft connected to the seventh rotation element, and selectively connected to the second rotation shaft, the third rotation shaft, the sixth rotation shaft, or the transmission housing, wherein the first planetary gear set is a double pinion planetary gear set, wherein the first rotation element is a first sun gear, the second rotation element is a first planet carrier, and the third rotation element is a first ring gear.