| 摘要 |
The invention relates to a multi-gear transmission for bicycles, comprising a plurality of crown gear transmissions (a, b) for providing different transmission ratios, with at least two crown gears (3, 9, 61a, 62a, 63a, 61b, 62b, 62c), a shifting device (2; 2a, 2b, 722) for selectively connecting the crown gears (3, 9, 61a, 62a, 63a, 61b, 62b, 62c) to fixed and/or rotating drive elements (1, 10, 12, 31, 100) and a plurality of pinions (4a, 4b) disposed between the crown gears (3, 9, 61a, 62a, 63a, 61b, 62b, 62c), each of said pinions being mounted on a pinion carrier (5a, 5b) rotatable about axes (51a, 51b) that are perpendicular the rotating axis of the crown gears (3, 9, 61a, 62a, 63a, 61b, 62b, 62c) and being engaged with the crown gears (3, 9, 61a, 62a, 63a, 61b, 62b, 62c).
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