| 摘要 |
An improved two-wheel-drive bicycle (10) having, in certain preferred forms, a chain-driven front-drive mechanism (38) having a gearing arrangement (40) attached to the fork assembly (24), whereby the gear arrangement, using fixed-axis and variable-axis turning members (42, 46), transfers rotational power from the drive mechanism (34) along and around the steering axis to the front sprocket (28). Certain preferred embodiments include particular gearing arrangements and particular ways of getting bicycle power to the fixed-axis turning members. |
