| 摘要 |
A bicycle comprises a frame, a front driven wheel mounted in a fork, a rear drive wheel mounted on the frame, connecting rods with pedals, a saddle, a brake. A pedal drive of bicycle is mounted on a shaft of rear wheel and consists of connecting rods with pedals rigidly fixed on both sides of the shaft of rear wheel, between which a central hub with bearings mounted therein and a bearing assembly are rigidly fixed on the shaft. |
