a car beam

Abstract

The invention relates to the technical field of automobiles, and discloses a longitudinal beam of an automobile. During a collision, the concave section area of ​​the outer panel of the longitudinal beam can be stably bent toward the inner panel of the longitudinal beam to form a first inflection point. The front end area of ​​the reinforcement The second inflection point is formed, and the rear section of the outer panel of the longitudinal beam forms the third inflection point for stable bending. When the car collides head-on, the energy of the collision is transmitted along the longitudinal direction of the longitudinal beam, and the three inflection points successively Stable bending occurs to form a four-segment bending effect at three bending points, which can effectively reduce the peak acceleration of the lower end of the B-pillar of the vehicle and the intrusion of the protective wall, and reduce the damage to the occupants. Moreover, by flexibly adjusting the concave section, the rear section and the reinforcement The location of the longitudinal beam can be shared by different models, which is beneficial to shorten the development cycle and reduce the development cost.

Description

technical field [0001] The present invention relates to the technical field of automobiles, in particular to an automobile longitudinal beam. Background technique [0002] Longitudinal beams play an important role in load-bearing and force transmission in automobiles. The longitudinal beam is equivalent to the skeleton of the car. In the event of a frontal collision accident, the longitudinal beam absorbs the collision energy through crushing deformation and bending deformation. [0003] The longitudinal beam is generally welded by the inner plate of the longitudinal beam and the outer plate of the longitudinal beam. When receiving high-speed collision energy, the deformation direction and degree of deformation of each position on the longitudinal beam are unstable. The plate side is bent, and it may also be bent to the outer plate side of the longitudinal beam, and the degree of bending is also random. Therefore, in the case of a frontal high-speed collision, the longitudi...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: the deformation mode of the existing longitudinal beam is unstable, which leads to an increase in the acceleration peak value of the lower end of the B-pillar of the vehicle and an increase in the intrusion of the protective wall, which will cause greater damage to the occupants; moreover, the longitudinal beams of different models cannot Sharing is not conducive to shortening the development cycle and reducing development costs

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