Patent ID: 8388478

Claim:
An input shaft for a hybrid transmission that is used for the hybrid transmission equipped with a plurality of friction elements and at least two or more planetary gear sets receiving power from an engine and at least one or more motor generators, the input shaft comprising: a first spline to which at least one of the motor generators are connected; a second spline and a third spline to which rotary elements of the planetary gear sets are connected, respectively; and a lubricant channel formed inside the input shaft to provide a channel for lubricant for lubricating parts of the transmission, wherein the lubricant channel is formed longitudinally through the center portion of the input shaft, wherein control pressure channels are further formed longitudinally close to the lubricant channel in the input shaft to supply working hydraulic pressure to any one of the friction elements, wherein the control pressure channels are formed symmetrically along a circumferential direction of the input shaft with the lubricant channel therebetween, wherein the at least one or more motor generators include a first motor generator and a second motor generator, wherein the at least two or more planetary gear sets include a first planetary gear set and a second planetary gear set, wherein the first motor generator is connected to the third spline through the engine and the first planetary gear set, wherein a rotor of the second motor generator is directly connected to the first spline, and wherein the second planetary gear set is connected to an output shaft and the second spline.