The motorcycle body frame comprises two main pipes, a bottom pipe, a connecting pipe, a rear cradle shaft and a reinforcing pipe, the outer pipe walls of the two main pipes are each provided with a first connecting part in a protruding mode, and the two ends of the connecting pipe are connected with the first connecting parts of the two main pipes correspondingly; the rear cradle shaft penetrates through the through hole of the connecting pipe, and the part, penetrating out of the connecting pipe, of the rear cradle is provided with a first installation part used for installing the rear cradle shaft, so that the rear cradle can be installed on the outer side of the vehicle body frame. According to the vehicle body frame, the rear cradle is installed on the outer side of the vehicle body frame, on one hand, the distance between the two main pipes is effectively reduced, the length of a reinforcing pipe is shortened, and the weight of a pipe fitting is reduced; and on the other hand, the supporting span of the bottom pipe and the reinforcing pipe is reduced, so that the stress of the bottom pipe and the reinforcing pipe during bearing is effectively reduced, the wall thickness of the bottom pipe and the wall thickness of the reinforcing pipe can be reduced under the condition that enough strength of the motorcycle body is kept, and then light weight of the motorcycle is achieved.

    本申请涉及一种摩托车及其车体框架,车体框架包括两根主管、底管、连接管、后摇架轴以及加强管,两根主管的外管壁均凸设有第一连接部,连接管的两端分别与两根主管的第一连接部连接,后摇架轴穿设于连接管的通孔并且后摇架穿出于连接管的部分设有用于安装后摇架轴的第一安装部,从而使得后摇架能够安装于车体框架外侧。上述车体框架将后摇架安装于车体框架外侧,一方面,有效降低了两主管的间距,从而缩短了加强管的长度,减轻了管件重量;另一方面,减小了底管和加强管的支撑跨度,从而有效降低了底管和加强管承载时的应力,从而能够在保持车体具有足够强度的条件下减薄底管和加强管的壁厚,进而实现摩托车轻量化。


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    Title :

    Motorcycle and motorcycle body frame thereof


    Additional title:

    摩托车及其车体框架


    Contributors:
    YE JIANRONG (author) / ZOU ZHIMIN (author) / LIU ZHONGWEI (author)

    Publication date :

    2023-07-14


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62K Fahrräder , CYCLES



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