Abstract: In a hybrid transmission, input and output side motor/generators (MG1, MG2) and input and output portions (In, Out) are coupled to two sets of the differential units (G1, G2) in such a manner that, under a selection of a first predetermined gear ratio, in a revolution speed order, the input side motor/generator (MG1), the input portion (In) from a prime mover (engine), the output portion (Out) toward a vehicular drive system, and the output side motor/generator (MG2) are coupled to the respective revolvable elements of the two sets of the differential units (G1, G2) and the output side motor/generator is coupled to any one of the revolvable elements of the two sets of the differential units including those revolvable elements thereof which do not contribute to a revolution of the output portion.

Abstract: In a hybrid transmission, input and output side motor/generators (MG1, MG2) and input and output portions (In, Out) are coupled to two sets of the differential units (G1, G2) in such a manner that, under a selection of a first predetermined gear ratio, in a revolution speed order, the input side motor/generator (MG1), the input portion (In) from a prime mover (engine), the output portion (Out) toward a vehicular drive system, and the output side motor/generator (MG2) are coupled to the respective revolvable elements of the two sets of the differential units (G1, G2) and the output side motor/generator is coupled to any one of the revolvable elements of the two sets of the differential units including those revolvable elements thereof which do not contribute to a revolution of the output portion.

Abstract: A first helical gear (40) is supported by a first rotation shaft (4), and a second helical gear (13) is supported by a second rotation shaft (14). A rotation body (6, 7) comprising a third helical gear (7) which meshes with the first helical gear (40), and a fourth helical gear (6) which meshes with the second helical gear (13), is supported by an intermediate shaft (5). The rotation body (6, 7) is further supported by a thrust bearing (10, 11) in a direction along the intermediate shaft (5). The average radius R of the thrust bearing (10, 11) is determined according to the direction of the thrust load acting on the third helical gear (7), the direction of the thrust load acting on the fourth helical gear (6), and an angle &thgr;2 subtended by the application point of these thrust loads.

Abstract: A first helical gear (40) is supported by a first rotation shaft (4), and a second helical gear (13) is supported by a second rotation shaft (14). A rotation body (6, 7) comprising a third helical gear (7) which meshes with the first helical gear (40), and a fourth helical gear (6) which meshes with the second helical gear (13), is supported by an intermediate shaft (5). The rotation body (6, 7) is further supported by a thrust bearing (10, 11) in a direction along the intermediate shaft (5). The average radius R of the thrust bearing (10, 11) is determined according to the direction of the thrust load acting on the third helical gear (7), the direction of the thrust load acting on the fourth helical gear (6), and an angle &thgr;2 subtended by the application point of these thrust loads.