To provide a vehicle body rear part structure that can secure door closing performance and demist performance while suppressing torsional rigidity of a vehicle body from deteriorating, and further can suppress quietness to an occupant from deteriorating.SOLUTION: A vehicle body rear part structure 100 comprises: a back door opening rail 102 having a surface 138 outside a vehicle contacting a back door and a surface 130 at a vehicle interior side facing the surface outside the vehicle; a luggage floor panel 104, a portion of which overlaps with the back door opening rail in a front view; a sound isolation wall 164 arranged between the surface outside the vehicle and the surface at the vehicle interior side and positioned upper than the luggage floor panel; a continuous surface 150 continuing to the surface outside the vehicle; a drafter 154 opened to the continuous surface and positioned lower than the sound isolation wall; and a plurality of holes 122a, 122b, 122c, 126a and 126b, formed in a circular shape or in an elliptical shape on the surface at the vehicle interior side and positioned vertically between the luggage floor panel and the sound isolation wall, where the hole 122a formed closest to the sound isolation wall of the plurality of holes has largest areas.SELECTED DRAWING: Figure 2

    【課題】車体捩り剛性の低下を抑制しつつ、ドア閉まり性能およびデミスト性能を確保し、さらに乗員に対する静粛性の低下を抑制することができる車体後部構造を提供する。【解決手段】車体後部構造100は、バックドアと接する車外側の面138と車外側の面に対面する車室側の面130を有するバックドア開口レール102と、バックドア開口レールに正面視で一部が重なるラゲッジフロアパネル104と、車外側の面と車室側の面の間に配置されラゲッジフロアパネルよりも上方に位置する遮音壁164と、車外側の面に連続した連続面150と、連続面に開口され遮音壁よりも下方に位置するドラフター154と、車室側の面に設けられ円形または楕円形であってラゲッジフロアパネルと遮音壁の上下間に位置する複数の孔122a、122b、122c、126a、126bとを備え、複数の孔のうち遮音壁に最も近い位置に設けられた孔122aは、面積が最も大きい。【選択図】図2


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    Title :

    VEHICLE BODY REAR PART STRUCTURE


    Additional title:

    車体後部構造


    Contributors:

    Publication date :

    2023-12-21


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR



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