Automobile body front longitudinal beam structure and automoible

Abstract

The invention discloses an automobile body front longitudinal beam structure and an automobile provided with the automobile body longitudinal beam structure. The automobile body front longitudinal beam structure comprises a front longitudinal beam main body which comprises a front section part made from a cast aluminum material and a rear section part made from an ultrahigh-strength steel material. The front section part comprises an energy absorption box section, a connecting piece section, a straight beam section and a bent section which are connected in sequence. The front section part is connected with the rear section part through the bent section. By adoption of the front longitudinal beam structure made from steel and aluminum, the weight of an automobile body can be remarkably lowered, and advantages in fuel economy performance and the like are achieved; and through the structure different from that of a traditional sheet metal component, collision energy distribution is optimized, the energy absorption efficiency is improved, and accordingly the collision performance of the whole automobile is improved.

Description

technical field [0001] The invention relates to the technical field of automobile bodies, in particular to a front longitudinal beam structure of an automobile body and an automobile having the front longitudinal beam structure of the automobile body. Background technique [0002] With the rapid development of the automobile industry, the competition in the automobile sales market is becoming increasingly fierce. Low cost, high quality, light weight and other characteristics are more and more valued and favored by people. [0003] As a body frame member, the front side member of the automobile body has always received high attention in the structural performance. The front side members are arranged on both sides of the lower part of the engine compartment along the longitudinal direction of the vehicle. In the event of a frontal collision of the vehicle, the front side member is the most important carrier for absorbing and transmitting the collision energy. [0004] The c...

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Problems solved by technology

[0005] The obvious disadvantage of this structural layout is that due to the limitation of the sheet metal process, the front section is basically rectangular or similar to rectangular, such as Figure 12 shown

Such a cross-sectional structure is not easy to produce stable axial collapse in the axial collision impact, but is prone to bending, which makes the energy absorption efficiency of the beam structure low during deformation

In this way, the area of ​​the bending section 103 is overloaded, resulting in bending failure, which in turn will cause excessive intrusion into the passenger compartment, endangering the safety of the passengers

In this regard, an improvement method made by the industry is to strengthen the area of ​​the bending section 103 to supplement the lack of performance, but this method will cause a significant increase in the overall weight

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