| 摘要 |
<p>Provided is a planetary gear device (1) wherein a pinion shaft (20) is inserted by pressure into a main wall (11) and a supplementary wall (12) of a carrier (10). A sleeve (30) comprising first and second sleeves (30a, 30b) is rotatably fitted into the pinion shaft (20). A pinion gear (7) is supported on the sleeve (30) via a needle roller (18) that forms a full complement roller bearing. The sleeve (30), which is in contact with the needle roller (18), rotates with respect to a pinion shaft (20), and thus concentration of wear in specific portions is mitigated, and the pinion shaft (20) has a large contact surface with the sleeve (30), and thus the sleeve (30) also does not receive wear. Thus, a gear support structure that does not emit unwanted noise caused by rattling or uneven wear can be provided.</p> |
