The invention provides an auxiliary frame assembly, an automobile body structure and an automobile. The auxiliary frame assembly comprises an auxiliary frame longitudinal beam, a longitudinal beam reinforcing plate and a lower swing arm. An inducing groove is formed in the auxiliary frame longitudinal beam; the inducing groove is formed in the left-right direction of a vehicle so that the auxiliary frame longitudinal beam can be divided into a longitudinal beam front section and a longitudinal beam rear section, and an opening of the inducing groove faces upwards. A longitudinal beam reinforcing plate is arranged on the longitudinal beam front section, and the longitudinal beam rear section is connected with the lower swing arm. According to the auxiliary frame longitudinal beam, when the auxiliary frame longitudinal beam bears impact loads from the front face, under the combined action of the induction groove and the longitudinal beam reinforcing plate, the front section of the longitudinal beam is subjected to V-shaped bending deformation around the position where the induction groove is located, the pulling force between the lower swing arm and the steering knuckle is driven to sharply rise till local failure and fracture, and a failure mechanism at the connecting position is triggered; therefore, the wheels collide with the doorsill at a small collision angle in the front-back direction of the vehicle, the collision force transmission of the doorsill is improved, the impact on an upper vehicle body is reduced, and the small offset collision performance of the vehicle is improved.
本发明提供了一种副车架总成、车身结构及汽车,该副车架总成包括副车架纵梁、纵梁加强板和下摆臂;所述副车架纵梁上设有诱导槽;所述诱导槽沿车辆左右方向设置,以将所述副车架纵梁划分为纵梁前段和纵梁后段,且诱导槽的开口朝上;所述纵梁前段上设有纵梁加强板,所述纵梁后段与下摆臂相连。本发明中,当副车架纵梁承受来自正面的冲击载荷时,在诱导槽和纵梁加强板的共同作用下,纵梁前段绕诱导槽所在位置发生V型折弯变形,带动下摆臂与转向节之间的拉力急剧上升,直至局部失效断裂,触发连接处的失效机制,从而使得车轮沿车辆前后方向以较小的碰撞角度撞击门槛,提升门槛碰撞传力,减小对上车体所受冲击,改善车辆的小偏置碰撞性能。
Auxiliary frame assembly, automobile body structure and automobile
副车架总成、车身结构及汽车
2024-08-06
Patent
Electronic Resource
Chinese
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