PROBLEM TO BE SOLVED: To enable proper axial collapse of crash boxes at time of a vehicle collision to improve the collision energy absorption efficiency in an impact absorption structure of a vehicle body frame where a cross member is supported at middle parts of the crash boxes through support brackets in an area below the crash boxes.SOLUTION: An impact absorption structure of a vehicle body frame includes: crash boxes 2 which are respectively provided at tips of left and right side rails 1 forming a vehicle body frame so as to extend forward and cause axial collapse at time of a collision; support brackets 3, each of which is attached to a middle part of the crash box 2 and extends downward; and a cross member 4 which is attached to the support brackets 3 and extends in a vehicle width direction below the crash boxes 2. In each crash box 2, axial strength of a rear portion 2r relative to the support bracket 3 is smaller than axial strength of a front portion 2f relative to the support bracket 3.SELECTED DRAWING: Figure 5

    【課題】クラッシュボックスの途中に支持ブラケットを介してクロスメンバを下方に支持した車体フレームの衝撃吸収構造において、車両衝突時にクラッシュボックスが適切に軸圧壊し、衝突エネルギーの吸収効率を高める。【解決手段】車体フレームを構成する左右のサイドレール1の先端に前方に延出して設けられ、衝突時に軸圧壊するクラッシュボックス2と、クラッシュボックス2の途中に取り付けられ、下方に延出された支持ブラケット3と、支持ブラケット3に取り付けられ、クラッシュボックス2の下方にて車幅方向に延出されたクロスメンバ4とを備え、クラッシュボックス2は、支持ブラケット3よりも後方部分2rの軸方向強度が、支持ブラケット3よりも前方部分2fの軸方向強度よりも小さい。【選択図】図5


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    Title :

    IMPACT ABSORPTION STRUCTURE OF VEHICLE BODY FRAME


    Additional title:

    車体フレームの衝撃吸収構造


    Contributors:

    Publication date :

    2017-07-27


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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