Partition organization for front floor of vehicle body

Abstract

The invention relates to a front floor partition structure of a vehicle body. A front floor is divided into the following three parts: a left front floor, a middle bulge of the front floor and a right front floor which are connected into a whole through spot welding to form the front floor. The middle bulge of the front floor has convex-shaped cross section, and has variable-cross section structure with gradually decreased cross section from one end to the other end. After the partition mode is adopted, the different requirement of each block on the material is optimized, and the rigidity of the entire front floor is improved. At the same time, the partition structure is more favorable for the shaping of a single block, is convenient for workers to transport after the area is reduced, and also reduces the requirement on the equipment. In addition, because being independent after partitioning, the middle part of the floor acts as a beam, and the convex-shaped variable-cross section design of the bulge in the front floor improves the bending resistance and torsional resistance. Furthermore, the invention is more favorable for protecting the safety of people.

Description

technical field [0001] The invention belongs to the technical field of automobile bodies, and in particular relates to a front floor structure of an automobile body. Background technique [0002] The body is a multi-degree-of-freedom elastic system, which will deform under the excitation of external forces and cause system vibration. When the external excitation frequency is close to or in multiples of the natural frequency of the system, resonance will occur. Resonance not only makes occupants feel very uncomfortable, but also brings noise and fatigue damage to components; it also destroys the protective layer on the surface of the body and the sealing of the body, thereby weakening the corrosion resistance. A large cover with low strength and poor stiffness is likely to cause forced vibration of the plate shell under the excitation of the vibration source. Similarly, when the excitation frequency is close to the natural frequency of the inner and outer panels of the vehi...

AI Technical Summary

Problems solved by technology

Moreover, due to the large area of ​​the large cover, it brings inconvenience to production and transportation, and it is easy to cause deformation during transportation.

[0003] The traditional front floor of the vehicle body is mostly integral. The integral front floor panel shell of the vehicle body is drawn deeply due to the deep drawing of the middle part of the floor. The material selection is biased towards materials with a relatively large stretching rate, thus reducing the rigidity of the entire front floor. Intensity, under the excitation of the vibration source, it is easy to cause forced vibration, which reduces the comfort of the occupants

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