The invention relates to an electric bicycle frame lower pipe combination method and a combination structure thereof. The method comprising the following steps of welding a head tube and a reinforcing tube, namely combining the head tube and the reinforcing tube at an angle; a step of welding the head pipe and the lower pipe, namely sleeving the reinforcing pipe into the lower pipe, exposing the bottom ends of the head pipe and the reinforcing pipe, and then welding the corresponding positions of the top ends of the head pipe and the lower pipe; a motor bracket welding step, wherein the front end side of the motor bracket is connected to a bottom end of the lower pipe and a bottom end of the reinforcing pipe in a sleeving mode at the same time, and then welding is conducted; and a reinforcing pipe and lower pipe connecting step, welding the two sides of the middle section of the reinforcing pipe and the inner wall of the lower pipe from the opening of the lower pipe. By means of the steps of the method, the structural strength of the frame lower tube can be considered, and the combination process is simplified.

    本发明涉及一种电动自行车车架下管结合方法及其结合结构,包含有:一头管与一强化管焊接步骤,是将一头管及一强化管呈现一角度结合;一头管与下管焊接步骤,是将该强化管套入于一下管内,并将该头管及该强化管的底端外露,再进行该头管与下管顶端对应处进行焊接;一马达托架焊接步骤,是将该马达托架的前端侧同时套接于该下管底端及该强化管的底端后进行焊接;及一强化管与下管接步骤,是从该下管的开口对该强化管中段处二侧与该下管内壁进行焊接;凭借方法步骤,可以同时兼顾其车架下管的结构强度及其结合制程简化。


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    Title :

    Electric bicycle frame lower pipe combination method and combination structure thereof


    Additional title:

    电动自行车车架下管结合方法及其结合结构


    Contributors:
    ZHUO ZIJIAN (author) / WANG JIANSHENG (author) / BAI MINLANG (author)

    Publication date :

    2022-01-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62K Fahrräder , CYCLES



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