Body-in-white tail support element and vehicle tail reinforcing structure formed by body-in-white tail support element

The utility model provides a body-in-white tail support element, which comprises an outer frame, reinforcing rib plates and inclined support plates, wherein the outer frame forms a ring shaft through end-to-end connection, and is fixedly arranged in a cavity formed at four corner points of a vehicle tail door hole, the reinforcing rib plates are in a grid shape, are arranged in the outer frame and are connected with the inner wall of the outer frame, the reinforcing rib plates comprise transverse reinforcing plates connected with end points of the two ends of the outer frame, a plurality of inclined support plates are arranged in the outer frame in parallel at intervals, the inclined support plates are crossed with the transverse reinforcing plates, and supplementary reinforcing plates are arranged between the crossing points of the inclined support plates and the transverse reinforcing plates and the end points of the outer frame as well as between the crossing points of the inclined support plates and the transverse support plates and the crossing points of the inclined support plates and the outer frame. The body-in-white tail support element has the advantages that the tail door hole rigidity is increased by about 600N.M/deg, and the deformation is reduced by about 0.45mm. Compared with a traditional structure, the body-in-white tail support element has the advantages that the performance improvement effect is more obvious, the weight is lighter, and a vehicle body weight reducing effect is realized. The utility model also provides a vehicle tail reinforcing structure formed by the body-in-white tail support element.