The invention discloses a labor-saving bicycle which comprises a bicycle body, a first chain wheel, a first chain and a second chain wheel are arranged on the bicycle body, the first chain wheel is connected with the second chain wheel through the first chain, the labor-saving bicycle further comprises a transmission device arranged on the bicycle body, and the transmission device is connected with a pedal crankshaft of the bicycle body. The pedal crankshaft drives the transmission device to move, the transmission device drives the first chain wheel to rotate, and the transmission ratio of the transmission device to the first chain wheel is larger than one. According to the bicycle, due to the fact that the transmission device is additionally arranged, and the transmission ratio of the transmission device to the first chain wheel is larger than one, when the pedal crankshaft treads the transmission device to rotate by one circle, the number of rotation turns of the first chain wheel is larger than one, the rotation speed of the first chain wheel can be increased, the riding speed of the bicycle is increased, and labor is saved to a certain degree.

    本发明公开了一种省力自行车,包括自行车本体,自行车本体上设有第一链轮、第一链条和第二链轮,第一链轮通过第一链条与第二链轮相连,还包括设在自行车本体上的传动装置,传动装置与自行车本体的脚踏曲轴相连,脚踏曲轴带动传动装置运动,传动装置带动第一链轮转动,传动装置与第一链轮的传动比大于一。本发明中,由于增加了传动装置,并且传动装置与第一链轮的传动比大于一,因此,通过脚踏曲轴踏动传动装置转动一圈时,第一链轮的转动圈数大于一,可以使得第一链轮的转动速度变快,提升自行车骑行的速度,并在一定程度上省力。


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    Title :

    Labor-saving bicycle


    Additional title:

    省力自行车


    Contributors:

    Publication date :

    2021-06-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer



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