Patent ID: 8764602
Filing Date: 2014-07-01
Classification: F16H

Abstract:
1. A planetary gear train of an automatic transmission for a vehicle, comprising: a first shaft receiving torque of an engine; a second shaft disposed in parallel with the first shaft and selectively receiving a rotation speed of the first shaft as an inverse rotation speed; a first planetary gear set disposed on the first shaft, and including a first ring gear directly connected to the first shaft so as to be continuously operated as an input element, a first planet carrier selectively operated as an output element, and a first sun gear selectively operated as an output element as rotation elements thereof; a second planetary gear set disposed on the second shaft, and including a second sun gear receiving an inverse rotation speed from the first planet carrier, a second ring gear selectively connected to the second shaft, and a second planet carrier as rotation elements thereof; a third planetary gear set disposed on the second shaft, and including a third sun gear directly connected to the second shaft, a third ring gear selectively connected to the first sun gear and receiving an inverse rotation speed, and a third planet carrier directly connected to the second planet carrier and directly connected to an output gear as rotation elements thereof; three transfer gears interposed at connecting portions between the rotation elements; and five frictional elements selectively interconnecting the rotation elements or selectively connecting the rotation elements to a transmission housing.