Bumper system with face-mounted energy absorber

B - Operations – Transporting – 60 – R

Patent

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Details

B60R 19/03 (2006.01) B60R 19/18 (2006.01)

Patent

CA 2443975

A bumper system (20) for vehicles includes a B-shaped tubular bumper beam (21) with top (23) and bottom (24) mid-walls defining a channel (25) in its front surface (26). A polymeric energy absorber (22) has multiple box-shaped sections (27) that abut the front surface (26) of the bumper beam (21) and further includes rearwardly-extending nose sections (28) that extend into the channel (25). The nose sections (28) include collapse-controlling kick walls (30, 31) that lie along the top (23) and bottom (24) mid-walls and that are connected to the box-shaped sections (27). Upon impact by an object against the bumper system (20), the kick walls (30, 31) press into the top (23) and bottom (24) midwalls, resulting in a consistent and controlled collapse of the energy absorber (22) and tubes of the bumper beam (21).

L'invention concerne un système de pare-chocs (20) destinés à des véhicules comportant une poutre de pare-chocs tubulaire en forme de B (21) avec des parois médianes supérieure (23) et inférieure (24) qui définissent un canal (25) au niveau de sa surface frontale (26). Un amortisseur polymère (22) comprend plusieurs parties en forme de boîte (27) contiguës à la surface frontale (25) de la poutre de pare-chocs (21), ainsi que des parties de nez s'étendant vers l'arrière (28) dans le canal (25). Les parties données (28) comprennent des parois de renforcement à écrasement contrôlé (30, 31) disposées le long des parois médianes supérieure (23) et inférieure (24) et qui sont reliées aux parties en forme de boîte (27). Lors de l'impact d'un objet contre le système de pare-chocs (20), les parois de renforcement (30, 31) s'écrasent dans les parois médianes supérieure (23) et inférieure (24), ce qui entraîne un écrasement régulier et contrôlé de l'amortisseur (22) ainsi que des tubes de la poutre du pare-chocs (21).

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