Connecting structure of automobile aluminum alloy floor beam

Abstract

An automobile aluminum alloy floor beam connecting structure is provided with a first connecting piece and a second connecting piece. The first connecting piece is of a hollow cavity structure, is provided with an arc-shaped top face extending towards the front side and the rear side, is connected with the first cross beam in a spot welding mode through an arc-shaped top face front side extending part, a cavity front side wall and a cavity bottom face, and is connected with the end of the longitudinal beam in a spot welding mode through an arc-shaped top face rear side extending part and a cavity rear side wall. The second connecting piece is a T-shaped hollow shell, the upper end and the lower end of the second connecting piece are of an open structure, a longitudinal beam penetrating groove and a cross beam penetrating groove are formed in the side wall of the second connecting piece, the longitudinal beam penetrates through the longitudinal beam penetrating groove, the left side wall and the right side wall of the longitudinal beam are connected with the longitudinal inner wall of the T-shaped hollow shell in a spot welding mode, and the end of the second cross beam penetrates through the cross beam penetrating groove. The front side wall and the rear side wall of the second cross beam are in spot welding connection with the transverse inner wall of the T-shaped hollow shell. Reliable connection of parts in the aluminum alloy floor beam assembly is achieved, and the purposes of meeting the requirements of automobile floor beam connection strength, light weight and low cost are achieved.

Description

technical field [0001] The invention relates to an automobile floor beam, in particular to a connection structure of an automobile aluminum alloy floor beam. Background technique [0002] At present, in the automobile floor beam assembly, the beams and the longitudinal beams are generally stamped and formed parts of steel plates, and the connection between the beams and the longitudinal beams is realized by a spot welding process. With the continuous deepening of the concept of lightweight design of automobiles, in order to better reduce the weight of the body, the body floor beam structure of aluminum alloy material is selected in the design of the whole vehicle. [0003] as attached figure 1 , figure 2 , image 3 As shown in the figure, after the automobile floor beam parts are made of aluminum alloy material, if the connection method similar to the steel stamping and forming parts is still adopted (that is, the first beam 1, the second beam 3 and the longitudinal beam...

AI Technical Summary

Problems solved by technology

However, due to the problems of heavy weight and low strength of cast aluminum connectors (yield strength of cast aluminum parts is about 200MPa), and the cost of casting process is high, it is difficult to meet the requirements of connection strength, light weight and low cost of automobile floor beam assembly

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