| 摘要 |
<p>A first rotational shaft (6), a second rotational shaft (10), and an output shaft (16) are juxtaposed and provided in a casing (2), and a drive gear (14) provided on the second rotational shaft (10) and a driven gear (19) of the output shaft (16) are meshed with each other. A clutch device (21), which transmits rotation, obtained by synthesizing rotations of the first and second rotational shafts (6), (10) or rotation of the second rotational shaft (10) to the output shaft (16) is provided. On the other hand, an intermediate gear (15) is provided on the second rotational shaft (10), and a counter gear (20) meshed with the intermediate gear (15) is provided on the outer periphery side of the first rotational shaft (6). A bearing device (23) is provided between the first rotational shaft (6) and the counter gear (20). This bearing device (23) is configured by combining four angular contact ball bearings (24) and arranged at a position corresponding to a meshed portion between the counter gear (20) and the intermediate gear (15) in the axial direction of the first rotational shaft (6).</p> |
