Multi-cavity threshold beam for automobile

The utility model discloses a multi-cavity doorsill beam for an automobile, which relates to the technical field of automobile manufacturing and comprises a doorsill beam body, a plurality of vertical ribs and transverse ribs are arranged in the doorsill beam body, and the doorsill beam body is divided into an outer cavity and an inner cavity by the vertical ribs and the transverse ribs. The arrangement density of the vertical ribs and the transverse ribs in the outer side cavity is lower than that of the inner side cavity, so that the rigidity of the inner side cavity is larger than that of the outer side cavity, and a bottom plate of the outer side cavity arches upwards in an arc shape to form a crushing induction structure. The deformation form, deformation amount and deformation positions of the multiple cavities can be effectively controlled, the overall rigidity of the outer cavity is smaller than that of the inner cavity, reasonable crushing deformation can be achieved, and the effect of fully absorbin