| 摘要 |
A multipurpose transmission mechanism for bicycles, including a pair of one-way cranks (1), a control mechanism, a reciprocating mechanism, and a fixed lock wheel (10) and a chain wheel holder (9). By means of the control of control levers (31), the movable lock wheels (18) of the control mechanism (26) are moved to couple with the alternative wheels of the reciprocating mechanism permitting the cranks to perform reciprocating lever motion, to couple with the fixed lock wheel (10) and the chain wheel holder (9) permitting the cranks (1) to perform circular crank motion, or to disengage from the alternative wheels, the fixed lock wheel as well as the chain wheel holder permitting the cranks to be (1) simultaneously driven to rotate synchronously, (2) simultaneously driven to perform reciprocating lever motion, (3) respectively driven to rotate alternatively, (4) alternatively driven to perform reciprocating lever motion, (5) one driven to perform circular crank motion and the other kept standing still, or (6) one driven to perform reciprocating lever motion and the other kept standing still. <IMAGE> |
