Front longitudinal beam applicable to automobile body

Abstract

The invention provides a front longitudinal beam applicable to an automobile body. The front longitudinal beam comprises two weldments (7) same in structures. The weldments (7) are formed through sheet material stamping and comprise upper welding edges (71) and lower welding edges (75), bulges having trapezoid cross sections are arranged on the middles of the weldments (7) through stamping, the two weldments (7) are arranged in a manner the sunken sides of the bulges are opposite, so that the front longitudinal beam has a cavity having a cross-shaped section, energy absorbing box mounting holes (72) are formed in the positions, close to the ends, of the weldments (7) in the direction perpendicular to the front longitudinal beam, and the front longitudinal beam is in bolted connection with energy absorbing boxes (3). The front longitudinal beam is higher in longitudinal strength, small in deformation amount during front crash and capable of better protecting passengers in the automobile, the energy absorbing boxes can be assembled more conveniently through the front longitudinal beam, the assembled energy absorbing boxes can be well supported, and thus the energy absorbing boxes can play a good role in absorbing energy.

Description

Technical field [0001] The present invention relates to the technical field of automobile bodies, in particular to a front longitudinal beam used for automobile bodies. Background technique [0002] An energy absorbing box is arranged between the front anti-collision beam and the front longitudinal beam of the automobile. The current front longitudinal beam and the energy absorbing box are commonly used as figure 1 The connection shown is that a connecting plate 2 is provided between the energy absorbing box 3 and the front longitudinal beam 1, and the surface of the connecting plate 2 is perpendicular to the length direction of the front longitudinal beam 1. This connection method has the following disadvantages: [0003] First, in the event of a collision, the connecting plate 2 is prone to bend and deform, which causes its support for the energy absorbing box 3 to weaken or fail, so that the energy absorbing box 3 cannot perform its energy absorbing effect well; secondly, in the ...

AI Technical Summary

Problems solved by technology

Due to the weak longitudinal strength of the semi-square bracket formed by simple processing of the plate, the square front longitudinal beam has the problem of insufficient strength, resulting in excessive deformation of the car body during a frontal collision, which cannot form a good shape for the passengers in the car. protection of

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