| 摘要 |
A bicycle comprising a frame having a front wheel, a rear wheel and a pedal crank shaft connected to the rear wheel. An internal combustion engine is also connected to the rear wheel. A gear train comprising an input gear, an output gear, and an intermediate gear in mesh with the two gears is interposed between the pedal crank shaft and a driving sprocket connected to the rear wheel, the intermediate gear being loosely and rotatably mounted on a rotatable supporting shaft such that by driving the pedal crank shaft in rotation the supporting shaft can be turned due to frictional engagement by the input and intermediate gears. A throttle control member for the engine is connected to an end portion of the supporting shaft so that the member is operated by turning of the shaft. The supporting shaft is provided on one side with a dashpot coupled with the shaft so that rotation of the shaft is dampened.
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