Central-through-sunken-part-reinforced front longitudinal beam

Abstract

The invention provides a central-through-sunken-part-reinforced front longitudinal beam. The central-through-sunken-part-reinforced front longitudinal beam comprises a main side plate and a sunken side plate. A closed cavity is defined by the main side plate and the sunken side plate, a central sunken groove is formed in the sunken side plate, and the sinking direction of the central sunken groove faces the main side plate. The central-through-sunken-part-reinforced front longitudinal beam has the advantages that as the central-sunken-groove cross section design is adopted, the problem that a deformation form of a front longitudinal beam with a traditional cross section is instable is effectively solved; as the cross section form of the front longitudinal beam is changed, under the conditions of the same material and the same mass, the safe collision energy-absorption requirement of the front longitudinal beam is effectively met, the crushing force and the energy absorption index are effectively increased, and the light-weight requirement of a car body is met.

Description

technical field [0001] The invention relates to an automobile body, in particular to a front longitudinal beam reinforced by a central penetrating depression in the automobile body. Background technique [0002] The deformation mode and energy absorption of the front longitudinal beam directly affect the intrusion of the passenger compartment and the acceleration damage value of the occupants. The front longitudinal beam is the basic load-bearing unit of the body frame structure and the key component for absorbing collision energy in the structure. It is generally used in The energy-absorbing area at the front end of the frame, its energy-absorbing characteristics directly determine the crash performance of the car. The component must not only have sufficient strength and rigidity, but also have good plastic deformation ability; it can not only ensure that the kinetic energy can be converted into the deformation energy constructed in this area as much as possible when the fr...

AI Technical Summary

Problems solved by technology

[0003] The dynamic drop weight test shows that the unreasonable design of the traditional hat-shaped section can easily lead to uncontrollable deformation such as insufficient energy absorption, bending, and indentation of the flange. Reduce Design Margin

At the same time, it increases the difficulty of constraint system matching

The deformation of the front longitudinal beam of the traditional section is not easy to control, so the energy absorption cannot meet the design requirements, and there are deficiencies in improving the utilization rate of materials or reducing the weight of the front longitudinal beam

Images