Bridging arrangement of vehicle beam and left-right longeron

Abstract

The invention discloses a lapping structure of the horizontal beam and the left and right longitudinal beams of an automobile, wherein, the cross section of the horizontal beam is U-shaped and both ends of the horizontal beam are welded crosswise with the longitudinal beams through the lapping edge to form an H shape; both ends of the horizontal beam are flared with the width growing larger and larger. The edges of the end form two symmetrical rolling up lapping edges and a straight lapping edge, wherein, two symmetrical rolling up lapping edges lap on the medial surface of the two longitudinal beams, namely, the surface of the direction of Z subject to the coordinate system of the automobile; the straight lapping edge laps on the upper surface of the longitudinal beams, namely, the surface of the direction of X subject to the coordinate system of the automobile. The invention can successfully solve the problem that the processing kerf at the root of the weld edge and the parts lapping edge easily cracks due to the force transferring effect of the H-shaped lapping structure in the automobile structures and the concentrated stress at the root of the lapping parts, thus guaranteeing the requirement of overall intensity and stiffness of the structure.

Description

technical field [0001] The invention relates to an automobile body structure, in particular to an automobile beam overlapping structure. Background technique [0002] Usually in the design of car body structure, such as figure 1 The shown car body frame cross beam 2 is overlapped with the left and right longitudinal beams 1 and 3 to form an "H"-shaped structure, and the cross section of the car body skeleton cross beam 2 is "U". The way of docking, that is, the two ends of the car body skeleton beam 2 are lapped with three flanges of soybean oil, and the left and right longitudinal beams are overlapped on the Z-direction plane (based on the car coordinate system). In front of the edge, a technological cut must be made. This structure has a poor force transmission effect, and cannot effectively transmit and decompose forces such as side collisions, and the torsion of the car body when driving can easily lead to overlapping edges. Stress concentration at the root of the flan...

AI Technical Summary

Problems solved by technology

[0002] Usually in the design of car body structure, such as figure 1 The shown car body frame cross beam 2 is overlapped with the left and right longitudinal beams 1 and 3 to form an "H"-shaped structure, and the cross section of the car body skeleton cross beam 2 is "U". The way of docking, that is, the two ends of the car body skeleton beam 2 are lapped with three flanges of soybean oil, and the left and right longitudinal beams are overlapped on the Z-direction plane (based on the car coordinate system). In front of the edge, a technological cut must be made. This structure has a poor force transmission effect, and cannot effectively transmit and decompose forces such as side collisions, and the torsion of the car body when driving can easily lead to overlapping edges. Stress concentration at the root of the flanging and cracking at the process cut

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