Lower vehicle body structure

Abstract

A lower vehicle body structure comprises a dash panel lower cross beam, a threshold longitudinal beam, a middle longitudinal beam, a middle channel and a front longitudinal beam. The threshold longitudinal beam and the middle channel are connected with the dash panel lower cross beam, the threshold longitudinal beam extends backwards from the dash panel lower cross beam, the middle longitudinal beam comprises a first supporting arm and a second supporting arm, and the first supporting arm and the second supporting arm form a herringbone structure. The front end of the first supporting arm is connected with a front longitudinal beam, the rear end is connected with the threshold longitudinal beam, the front end of the second supporting arm is connected with the first supporting arm, and therear end is connected with the middle channel.

Description

technical field [0001] The invention relates to the technical field of automobile lower structure, in particular to a lower body structure. Background technique [0002] With the rapid development of automobile technology, people have higher and higher requirements for automobile performance. The quality of the vehicle's substructure directly affects the performance of the vehicle, including frontal impact, side impact, bending and torsional rigidity, and ride comfort. [0003] At present, the main technical problems in the layout structure of the lower body are as follows: first, the layout space is limited, and it is difficult to arrange the force transmission structure according to the optimal force transmission path; second, the lower body is subjected to complex forces and various forces Restricted by factors, including frontal collision, side collision, the impact force of the shock absorber on the body, the force of the spring on the tower, and the impact force of th...

AI Technical Summary

Problems solved by technology

[0003] At present, the main technical problems in the layout structure of the lower body are as follows: first, the layout space is limited, and it is difficult to arrange the force transmission structure according to the optimal force transmission path; second, the lower body is subjected to complex forces and various forces Restricted by factors, including frontal collision, side collision, the impact force of the shock absorber on the body, the force of the spring on the tower, and the impact force of the chassis on the mounting point of the rear sub-frame, etc., how to take into account the above-mentioned performances at the same time It is a technical difficulty to arrange a reasonable force transmission path under the body

[0004] The common layout of the lower body on the market is to arrange a longitudinal beam at both ends of the central aisle to reach the central floor, and use two cross beams to install the seat structure. Plate structure, such solutions may cause problems such as structural incoherence, heavy weight, stress concentration leading to component cracking, and unbalanced structure and performance in the lower body structure

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