| 摘要 |
PROBLEM TO BE SOLVED: To provide a revolving unit of a working machine and a power transmission appropriate for the working machine, which are produced inexpensively in a simple structure and capable of developing low and high torque while controlling the waste of energy. SOLUTION: In the power transmission, rotation of a drive source is reduced by a reduction gear and outputted. The transmission includes a hydraulic motor 20 as a first driving source, an electric motor 70 as a second drive source, a sun gear 81 to which energy of rotation of the electric motor 70 is transferred, a plurality of planetary gears 82 meshed with the sun gear 81, a carrier 83 which rotationally supports the plurality of planetary gears 82 to receive transferred rotational energy of the hydraulic motor 20, an internal gear 84 freely rotatably meshed with the plurality of planetary gears 82, and a reduction gear 80 of the planetary-gear mechanism having an output shaft 85 to which energy of rotation of the internal gear 84 is transferred. COPYRIGHT: (C)2008,JPO&INPIT
|
