Longitudinal beam structure of vehicle body

Abstract

The invention provides a longitudinal beam structure of a vehicle body. The longitudinal beam structure comprises front longitudinal beams extending along the direction of the vehicle body and a front wall cross beam connecting between the front longitudinal beams. Each front longitudinal beam comprises a longitudinal beam front section and a longitudinal beam rear section, the longitudinal beam front sections comprise front half parts and rear half parts, and the front half parts and the rear half parts are welded and connected to be a whole in a laser butt-welding mode. One ends of the longitudinal beam rear sections are connected with the front wall cross beam, and the other ends of the longitudinal beam rear sections are provided with bending areas and connected with the longitudinal beam front sections. The extension directions of the bending areas are perpendicular to the length extension directions of the front longitudinal beams. According to the longitudinal beam structure of the vehicle body, the bending areas are arranged on the longitudinal beam rear sections, when a vehicle collides, the bending areas on the longitudinal beam rear sections bend, most of the collision force along the extension directions of the longitudinal beams is converted into the force along the extension direction of the front wall cross beam, and the collision force on the left and right sides is hedged and offset along the front wall cross beam, so that the collision force is effectively unloaded, the energy transmission path can be effectively optimized, and thus the collision performance of the whole vehicle is improved.

Description

Technical field [0001] The invention relates to the technical field of automobile body safety structures, in particular to a body longitudinal beam structure. Background technique [0002] With the development of the automobile industry, customers pay more and more attention to the safety performance of automobiles. When a car crashes, the car body is required to have a good energy absorption effect, so as to maximize the living space of the drivers and passengers, and minimize The deformation of the cab is the most basic requirement. The front rail is an important part to ensure that the car has good collision performance. It absorbs and attenuates the impact energy through twisting and deformation to reduce or avoid damage to the occupants. In an ideal longitudinal beam structure, when a vehicle collides, the front part of the longitudinal beam should be able to effectively absorb energy, and the rear part of the longitudinal beam is less deformed, and transmits the force to t...

AI Technical Summary

Problems solved by technology

Although this structure can better absorb the collision energy, due to the increased thickness of the rear section of the longitudinal beam, the weight increases and is not conducive to light weight. The collision force can only be absorbed through deformation and cannot be effectively unloaded.

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