To provide a shock absorption mechanism that is capable of absorbing shock more effectively.SOLUTION: A shock absorption mechanism 2 is intended to reduce a collision load applied to a vehicle, and is disposed between a bumper reinforcement 11 receiving the collision load and a side member 9 to which the collision load is transferred from the bumper reinforcement 11. The shock absorption mechanism 2 includes an impact absorption material 1 made of wood, and bolts 3. The bolts 3 are connected to the side member 9, and are arranged to abut on a rear end surface of the impact absorption material 1. In the bolt 3, a distance X1 between a sectional center line of the bolt 3 and a side face of the impact absorption material 1 is defined as {D1-(1-ε)C1}/ε or less, when a width of the bolt 3 is 2D1, and a width of a plane part 5 is 2C1. In a stress-strain distribution indicating a relationship between stress and strain when the impact absorption material 1 is compressed in a vehicle width direction, ε denotes a value of the strain corresponding to a strain hardened region.SELECTED DRAWING: Figure 2
【課題】より効果的に衝撃吸収を行うことのできる衝撃吸収機構を提供する。【解決手段】衝撃吸収機構2は車両に加わる衝突荷重を軽減させるためのものであり、衝突荷重を受けるバンパーリインフォース11と衝突荷重がバンパーリインフォース11から伝達されるサイドメンバ9の間に設けられる。衝撃吸収機構2は、木製の衝撃吸収材1とボルト3を有する。ボルト3はサイドメンバ9に連結され、衝撃吸収材1の後端面に突き当てて配置される。ボルト3は、ボルト3の幅を2D1、平面部5の幅を2C1として、ボルト3の断面中心線と衝撃吸収材1の側面との距離X1が{D1−(1−ε)C1}/ε以下となるように定められる。εは、衝撃吸収材1を車両幅方向に圧縮した際の応力とひずみの関係を示す応力−ひずみ分布において、ひずみ硬化域に対応するひずみの値である。【選択図】図2
SHOCK ABSORPTION MECHANISM
衝撃吸収機構
2020-12-10
Patent
Electronic Resource
Japanese
MANUFACTURING METHOD FOR SHOCK ABSORPTION MECHANISM, AND SHOCK ABSORPTION MECHANISM
European Patent Office | 2023
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