| 摘要 |
A coupling means for a bicycle provided with a pedal operated brake activating means (8) which is separated from the drive chain, comprising a first freewheel coupling (8) which is associated with the pedal crank assembly for torque transfer to the brake activating means (8) at reverse rotation of the pedal crank, and a second freewheel coupling (43; 64; 143) for torque transfer to the drive wheel at forward rotation of the pedal crank, and a third freewheel coupling which is associated with the drive wheel and arranged to deactivate either of said first freewheel coupling or said second freewheel coupling (43; 64; 143) by means of a shifting means (30; 65; 130) at reverse rotation of the drive wheel. A slip clutch (35, 36; 67, 69; 135, 136) is arranged to enable greater freedom of rotation as said third freewheel coupling is engaged. |
