A labor-saving bicycle relates to the technical field of bicycles and comprises a frame, a speed change device, pedals, a front fork, a front wheel, a handlebar, a rear fork, a rear wheel, a first bevel gear, a second bevel gear and a rear axle. A driving elliptical gear, a second straight gear, a third bevel gear and a first straight gear are sequentially installed on the driving shaft from bottom to top, a driven elliptical gear, a third straight gear and a fourth straight gear are sequentially installed on the driven shaft from bottom to top, and the driving elliptical gear is meshed with the driven elliptical gear. A fourth bevel gear and a second bevel gear are installed at the two ends of the bevel gear shaft respectively, the third bevel gear is meshed with the fourth bevel gear, the second bevel gear is meshed with a first bevel gear, the first bevel gear is installed on a rear wheel shaft of the rear wheel, and pedals are installed on the driving shaft. According to the labor-saving bicycle, the problems of chain falling and loosening are solved, the bicycle is more labor-saving to ride, and the square hole of the crank cannot deform and loosen.

    一种省力自行车,它涉及自行车技术领域,它包含车架、变速装置、脚踏、前叉、前轮、车把、后叉、后轮、第一伞齿轮、第二伞齿轮和后轮轴;主动轴上由下至上依次安装有主动椭圆齿轮、第二直齿轮、第三伞齿轮和第一直齿轮,从动轴上由下至上依次安装有从动椭圆齿轮、第三直齿轮和第四直齿轮,主动椭圆齿轮与从动椭圆齿轮啮合,伞齿轮轮轴的两端分别安装有第四伞齿轮和第二伞齿轮,第三伞齿轮与第四伞齿轮啮合,第二伞齿轮与第一伞齿轮啮合,第一伞齿轮安装在后轮的后轮轴上,脚踏安装在主动轴上。本发明所述的一种省力自行车,没有掉链、松动的问题,而且骑起来比较省力,且曲柄的方孔不会变形、松动。


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    Title :

    Labor-saving bicycle


    Additional title:

    一种省力自行车


    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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