Patent ID: 9163705
Filing Date: 2015-10-20
Classification: F16H

Abstract:
1. A planetary gear train of an automatic transmission for vehicles, comprising: an input shaft into which power of an engine is input; a first planetary gear set including a first sun gear, a first planetary carrier, and a first ring gear; a second planetary gear set including a second sun gear, a second planetary carrier, and a second ring gear; a third planetary gear set including a third sun gear, a third planetary carrier, and a third ring gear; a fourth planetary gear set including a fourth sun gear, a fourth planetary carrier, and a fourth ring gear; a fifth planetary gear set including a fifth sun gear, a fifth planetary carrier, and a fifth ring gear; a first rotational shaft including the first sun gear and selectively connected to a transmission housing; a second rotational shaft including the first and second planetary carriers and the third ring gear; a third rotational shaft including the first and second ring gears and selectively connected to the transmission housing; a fourth rotational shaft including the second sun gear and selectively connected to an input shaft; a fifth rotational shaft including the third planetary carrier and the fourth ring gear and selectively connected to the fourth rotational shaft; a sixth rotational shaft including the third sun gear and connected to the input shaft; a seventh rotational shaft including the fourth planetary carrier and the fifth ring gear and selectively connected to the input shaft; an eighth rotational shaft including the fifth planetary carrier and directly connected to an output member; a ninth rotational shaft including the fourth and fifth sun gears and selectively connected to the transmission housing; and six friction elements each selectively connecting one of the first, the second, the third, the fourth, the fifth, the sixth, the seventh, the eighth, or the ninth rotational shafts with one other of the first, the second, the third, the fourth, the fifth, the sixth, the seventh, the eighth, the ninth rotational shafts, or the transmission housing.