| 摘要 |
The mechanism consists of pedals with cranks (14) connected to a bottom bracket spindle. It incorporates an actuator (34) which can occupy one position in which the pedals and cranks transmit an effort to the spindle, and a second position in which the crank (14) moves in the opposite direction and engages a shock-absorber (36) which damps vibrations when the bicycle is ridden over rough ground and the rider pushes downwards on both pedals at the same time. The shock-absorber fits into a holder (44) on the crank and contains a spring, an elastomer block or a hydropneumatic system, connected to a control unit (38) by a rod (48). |
