A folding crank of an electric bicycle is characterized in that a limiting circular groove in a limiting structure is improved into a deep hole, and a limiting rod adopts an elastic limiting hand-pulling device: the limiting rod is manually pulled out from the limiting hole and is elastically inserted into the limiting hole, so that after a lower crank is opened, the lower crank is pulled out from the limiting hole; the limiting rod is pushed into the limiting hole by the force of the spring to limit the left-right folding of the lower crank, and the lower crank can be folded unless the limiting rod is manually pulled out, so that the risk of pedaling caused by sudden bending of the connecting rod when the stress of the connecting rod of the crank exceeds the clamping force formed by the ejector rod and the circular groove is eliminated, and the reliability of the folding function of the folding crank is guaranteed; after the folding crank is folded, the width of the electric bicycle is narrower, even the radius length of the folding crank with the center shaft as the circle center is shorter when the folding crank is folded, and the radius length of the folding crank with the center shaft as the circle center is rated after the folding crank is unfolded; the device is suitable for replacing the short crank of the national standard electric bicycle, and is simple in structure, high in bearing capacity, economical and practical.

    一种电动自行车的折叠曲柄,通过将限位结构中的限位圆形凹槽改进为深孔,限位杆采用弹力限位手拉装置:手动把限位杆从限位孔拉出,限位杆弹力插入限位孔的方式,使得下曲柄打开之后,限位杆被弹簧力推进限位孔而限制住下曲柄左右折叠,除非人为拉出限位杆,下曲柄才能被折叠,消除了当曲柄的连接杆受力超出顶杆与圆形凹槽形成的卡力时,连接杆突然折弯造成蹬车的风险和保障了折叠曲柄的折叠功能的可靠性;并且本折叠曲柄折叠之后电动自行车的宽度更窄,甚至本折叠曲柄在折叠的情况下以中轴为圆心的半径长度更短,打开之后又是以中轴为圆心的额定的半径长度;本发明适合更换国标电动自行车的短曲柄,而且结构简单,承力能力强,经济实用。


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    Titel :

    Folding crank of electric bicycle


    Weitere Titelangaben:

    一种电动自行车的折叠曲柄


    Beteiligte:
    PENG LIANG (Autor:in)

    Erscheinungsdatum :

    2023-12-15


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Chinesisch


    Klassifikation :

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



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