The invention provides a rear longitudinal beam assembly for a vehicle and a design method thereof, and relates to the field of vehicle bodies. The rear longitudinal beam assembly comprises a rear longitudinal beam body. The rear longitudinal beam body having an integrally-formed structure comprises a plurality of first areas, at least one second area and a plurality of transition areas arranged between the two first areas or between the first areas and the second areas. The hardness of each of the plurality of first areas is greater than a first threshold value, so that the safety of the vehicle is improved. And the hardness of at least one second area is smaller than a second threshold value, and the second threshold value does not exceed the first threshold value and is used for absorbing crumple energy generated during part collision. The lengths of the transition areas are larger than a third threshold value so that parts can be rolled conveniently. The thicknesses of the end faces of the two sides of each transition area are the same as the thicknesses of the end faces of the first area or the second area connected with the transition area, and the thickness of each transition area is gradually changed. The rear longitudinal beam body provided by the scheme of the invention is unequal in thickness and is integrally formed.

    本发明提供了一种用于车辆的后纵梁总成及其设计方法,涉及车身领域。后纵梁总成包括后纵梁本体。后纵梁本体为一体成型结构,包括多个第一区域、至少一个第二区域和多个位于两个第一区域之间或第一区域和第二区域之间的过渡区域。多个第一区域的硬度均为大于第一阈值,用于提高车辆的安全性。至少一个第二区域的硬度均为小于第二阈值,第二阈值不超过第一阈值,用于吸收零件碰撞时产生的溃缩能。多个过渡区域的长度大于第三阈值,以便于轧制零件。每一个过渡区域的两侧端面的厚度与其相连的第一区域或第二区域的端面的厚度相同,且每一个过渡区域的厚度渐变。本发明的方案提供的后纵梁本体是不等厚且一体成型的。


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    Title :

    Rear longitudinal beam assembly for vehicle and design method thereof


    Additional title:

    一种用于车辆的后纵梁总成及其设计方法


    Contributors:
    LI WENZHONG (author) / LI ZHENXING (author) / YAN XUEYAN (author) / LIU JING (author) / WANG LI (author) / LI LI (author) / GU PENGYUN (author)

    Publication date :

    2020-07-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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