To ensure the mesh accuracy of gears by supporting the tip peripheral edge parts of lateral ring gears rotatably fitted to lateral center shafts, by lateral turning gears connected to lateral sun gears and fitted to the lateral center shafts, so as to support the lateral ring gears in a twin state.
Bearing receivers 92L, 92R are formed at the outer peripheral edge parts of turning gears 46L, 46R, and bearing receivers 93L, 93R are formed at the outer peripheral edge parts of lateral ring gears 41L, 41R so as to project onto the lateral turning gears 46L, 46R side. These bearing receivers 92L, 92R, 93L, 93R are arranged in the overlapped state in the radial direction of lateral center shafts 45L, 45R, and bearings 94L, 94R are interposed between the bearing receivers 92L, 92R, 93L, 93R. The outer peripheral edge parts of the lateral ring gears 41L, 41R are thus supported by the lateral turning gears 46L, 46R so as to be supported in a twin state. The mutual mesh accuracy of the gears can therefore be ensured satisfactorily.
TSUJITA MASABUMI
MORITA SAICHIRO
