The invention discloses a bicycle crank labor-saving device which comprises a frame, a left pedal, a right pedal, a left crank, a right crank, a left labor-saving rod, a right labor-saving rod, a guide rod and a longitudinal guide rail, one end of the labor-saving rod is hinged to the cranks, the other end of the labor-saving rod is hinged to the pedals, the guide rod is fixedly connected with one end of the labor-saving rod, and the end of the guide rod is in sliding contact with the longitudinal guide rail. The longitudinal guide rail is fixedly connected with the frame. When the crank is located at the 12 o'clock position, the pedal obtains a large forward moving amount, the driving torque generated by the same treading force is greatly increased, and the labor-saving effect is remarkable.

    本发明公开了一种自行车曲柄省力装置,包括车架,左右脚踏板,左右曲柄,左右省力杆,省力杆的一端与曲柄铰接,另一端与脚踏板铰接,还包括导向杆,纵向导轨,所述导向杆与省力杆的一端固接,导向杆的端部沿纵向导轨滑动接触,纵向导轨与车架固接。当曲柄处于12点位置时,脚踏板获得了较大的前移量,同样的踩踏力所产生的驱动力矩大幅度增加,省力效果显著。


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    Title :

    Bicycle crank labor-saving device


    Additional title:

    一种自行车曲柄省力装置


    Contributors:

    Publication date :

    2023-01-20


    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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