Automobile longitudinal beam

Abstract

The invention relates to the technical field of automobiles, and discloses an automobile longitudinal beam, which is characterized in that a concave section area of a longitudinal beam outer plate can be stably bent towards a longitudinal beam inner plate in the collision process to form a first folding point, a front end area of a reinforcer forms a second folding point, and a rear section of the longitudinal beam outer plate forms a stably bent third folding point; when a front surface collision of the automobile occurs, collision energy is transmitted in the length direction of the longitudinal beam, three folding points are stably bent successively to form a three-folding-point four-section bending effect, the acceleration peak value of the lower end of the B column of the whole vehicle and the invasion amount of a protective wall can be effectively reduced, injuries to passengers are reduced, and by flexibly adjusting the arrangement positions of the concave section, the rear section and the reinforcer, the longitudinal beam can be shared on different vehicle types, the development period can be shortened, and the development cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of automobiles, in particular to an automobile longitudinal beam. Background technique [0002] The longitudinal beam plays an important role in carrying and transmitting force on the car. The longitudinal beam is equivalent to the skeleton of the car. When the car has 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, and it may move toward the inner side of the longitudinal beam. The side bending of the side beam may also bend toward the side of the outer side of the longitudinal beam, and the degree of bending is also random. Therefor...

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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