| 摘要 |
<p>A hub transmission is provided for a bicycle comprising a drive member (2) and a hub body (3) rotatably supported on a hub axle (1). At least one planetary gear mechanism (4, 5) is provided for transmitting rotational force from the drive member (2) to the hub body (3) through multiple rotational force transmission paths, where the planetary gear mechanism comprises at least one planetary gear (11, 12) mounted on a carrier pin (40) in a planetary gear carrier (4a). The planetary gear comprises at least one larger diameter gear section (11) and at least one smaller diameter gear section (12), each defining different gear ratios. The carrier pin comprises at least one larger diameter pin section (9) and at least one smaller diameter pin section (10). The larger diameter pin section (9) provides reinforcement for supporting the mechanical load on the larger diameter gear section (11). <IMAGE></p> |
