Planetary gear train of automatic transmission for vehicle

摘要

A planetary gear train of an automatic transmission for a vehicle may include: a first shaft; a second parallel shaft; a first planetary gear set on the first shaft including a first element selectively connected to the first shaft, a second element selectively connected to the first shaft or a transmission housing, and a third output element; a second planetary gear set on the second shaft, and including a fourth element selectively connected to the first shaft, connected to the first element, and selectively connected to the transmission housing, a fifth element connected to the third element and directly connected to an output gear, and a sixth element selectively connected to the first shaft; four transfer gears; and frictional elements including clutches selectively connecting the first, second, fourth, and sixth elements with the first shaft and brakes selectively connecting the second and fourth elements with the transmission housing.

主权项

1. A planetary gear train of an automatic transmission for a vehicle, comprising:
a first shaft receiving engine torque; a second shaft disposed in parallel with the first shaft at a predetermined distance; a first planetary gear set disposed on the first shaft and including a first rotation element selectively connected to the first shaft, a second rotation element selectively connected to the first shaft or a transmission housing, and a third rotation element operated as an output element; a second planetary gear set disposed on the second shaft, and including a fourth rotation element selectively connected to the first shaft through a first externally-meshed gear, connected to the first rotation element through a second externally-meshed gear, and selectively connected to the transmission housing, a fifth rotation element connected to the third rotation element through a third externally-meshed gear and directly connected to an output gear, and a sixth rotation element selectively connected to the first shaft through a fourth externally-meshed gear; four transfer gears connecting the fourth, fifth, and sixth rotation elements with the first shaft and the first and third rotation elements; and frictional elements including clutches selectively connecting the first, second, fourth, and sixth rotation elements with the first shaft and brakes selectively connecting the second and fourth rotation elements with the transmission housing.