Automobile lower body structure

Abstract

A body structure of the lower part of an automobile comprises a front bumper beam, a front longitudinal beam, a side threshold, a lower longitudinal beam of a front bottom plate, a front beam of a back bottom plate, a middle beam of the back bottom plate, a back longitudinal beam, a back bumper beam, the back bottom plate and the front bottom plate; wherein, the front longitudinal beam is directly connected with the lower longitudinal beam of the front bottom plate and the back longitudinal beam; the back longitudinal beam is connected with the side threshold in the place where the front bottom plate and the back bottom plate lap, and are reinforced by connecting the front beam of the back bottom plate. The adoption of the body structure of the invention can effectively improve the bending rigidity and the torsional stiffness of the whole automobile, thus being beneficial to improving the carrying capacity of the whole automobile, reducing local fatigue and damage caused by insufficient rigidity; moreover, when impacted fiercely, the body structure can rapidly transfer and disperse energy so as to prevent passengers from being shocked, thus obtaining the function of protecting passengers and improving the safety performance of the automobile.

Description

technical field [0001] The invention relates to a body structure of an automobile, and mainly relates to the design of the frame of the lower body structure of the automobile. Background technique [0002] In the previous car body structure, the lower body frame of most cars is basically composed of front longitudinal beams, front fender lower beams, front floor lower longitudinal beams, rear longitudinal beams, rear floor front beams, rear floor beams and threshold etc. The connection method generally follows that firstly, the front longitudinal beam and the lower longitudinal beam of the front floor are first connected, and then the lower longitudinal beam of the front floor is indirectly connected with the front crossbeam of the floor at the rear position of the rear longitudinal beam. Although the defect is not obvious in normal use, there are still two shortcomings: [0003] First of all, this connection method is not conducive to the improvement of the bending stiffn...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide an automobile lower body structure, in order to solve common problems such as insufficient vehicle rigidity encountered in the actual use of the above-mentioned automobile, severe compression of the living space of the occupant during collision, and poor NVH performance of the entire vehicle, and reduce the damage rate to ensure the safety of drivers and passengers

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