Lap joint structure of top cover rear cross beam and side coaming

Abstract

The invention belongs to a passenger vehicle body mounting technique, specifically relating to a lap joint structure of a top cover rear cross beam and a side coaming of a hatchback, and a welding manner of the top cover rear cross beam with an outer top cover plate and the side coaming. The lap joint structure of the top cover rear cross beam and the side coaming solves the problems of insufficient torsional rigidity and side impact resistance of a hatchback body and the like. The lap joint structure of the top cover rear cross beam and the side coaming comprises a top cover rear cross beam, an outer side coaming plate, a water flow groove, a rear prop inner-plate angle plate, an upper rear prop strengthening plate and an outer top cover plate, wherein a back door hinge strengthening plate is welded above the top cover rear cross beam; the upper rear prop strengthening plate is welded with the back door hinge strengthening plate; the rear prop inner-plate angle plate is welded with the top cover rear cross beam; the outer top cover plate is welded with the outer side coaming plate; and the back door hinge strengthening plate is further partially welded with the water flow groove on an outer side coaming plate assembly. The lap joint structure of the top cover rear cross beam and the side coaming is simple and rational in structure, feasible in process, high in strength, low in cost, and capable of improving the torsional rigidity and the side impact resistance of the hatchback body, and has excellent economical efficiency.

Description

technical field [0001] The invention belongs to the upper-mounting technology of a passenger car body, and in particular relates to the overlapping joint structure of a roof rear beam and a side wall of a hatchback, and a welding method of a roof rear beam, a roof outer plate and a side wall. Background technique [0002] The hatchback lacks the rear box bulkhead and bulkhead beam, and the lateral rigidity of the body is weakened. Therefore, the structural design of the roof beam of the hatchback and the overlap between the roof beam and the side wall is particularly important. Because this area is located at the corner, the lapping structure of the general top cover rear beam and the side wall is complicated, the profile of the connecting plate is difficult to fit well with the rear part of the side wall, and the positioning of the parts on the tooling is also difficult. The parts are overlapped at the corners, which will easily cause edge interference, warping and deforma...

AI Technical Summary

Problems solved by technology

Because this area is located at the corner, the lapping structure of the general top cover rear beam and the side wall is complicated, the profile of the connecting plate is difficult to fit well with the rear part of the side wall, and the positioning of the parts on the tooling is also difficult. The parts are overlapped at the corners, which will easily cause edge interference, warping and deformation, and cause the tailgate rubber strip to not be clamped tightly. Therefore, it is difficult for the hatchback to have good body torsional rigidity and side impact resistance. The overlapping of parts is not good, which affects the appearance quality of the car body

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