PLANETARY GEAR TRAIN OF AUTOMATIC TRANSMISSION FOR VEHICLES

摘要

A planetary gear train of an automatic transmission may include: an input shaft; an output shaft; first to third planetary gear sets and six control elements disposed between rotating elements, and disposed at portions where rotating elements are selectively connected to transmission housing, first rotating shaft including first rotating element and ninth rotating element and selectively connected with input shaft; second rotating shaft including second rotating element and fourth rotating element; third rotating shaft including third rotating element and selectively connected with input shaft or transmission housing; fourth rotating shaft including fifth rotating element; fifth rotating shaft including sixth rotating element and directly connected with transmission housing; sixth rotating shaft including seventh rotating element and selectively connected with second rotating shaft or fourth rotating shaft; and seventh rotating shaft including eighth rotating element and selectively connected with second rotating shaft and simultaneously and is directly connected with output shaft.

主权项

1. A planetary gear train of an automatic transmission for a vehicle, the planetary gear train comprising:
an input shaft which receives power from an engine; an output shaft which outputs power changed in speed; a first planetary gear set having first, second, and third rotating elements; a second planetary gear set having fourth, fifth, and sixth rotating elements; a third planetary gear set having seventh, eighth, and ninth rotating elements; and six control elements which are disposed between the rotating elements, and disposed at portions where the rotating elements are selectively connected to a transmission housing, a first rotating shaft including the first rotating element and the ninth rotating element and selectively connected with the input shaft; a second rotating shaft including the second rotating element and the fourth rotating element; a third rotating shaft including the third rotating element and selectively connected with the input shaft or transmission housing; a fourth rotating shaft including the fifth rotating element; a fifth rotating shaft including the sixth rotating element and directly connected with the transmission housing; a sixth rotating shaft including the seventh rotating element and electively connected with the second rotating shaft or the fourth rotating shaft; and a seventh rotating shaft including the eighth rotating element and selectively connected with the second rotating shaft and simultaneously and is directly connected with the output shaft.