Lower body cross beam structure of micro-truck, and machining process thereof

Abstract

The invention discloses a lower vehicle body cross beam structure of a micro-truck. The cross beam structure comprises a longitudinal beam, the longitudinal beam is composed of a rear longitudinal beam front section reinforcing plate, a longitudinal beam rear section body connecting plate, a longitudinal beam lower reinforcing plate, a longitudinal beam lower reinforcing plate rear portion and a rear longitudinal beam cover plate. The rear longitudinal beam front section reinforcing plate is welded with the inner wall of the longitudinal beam rear section body connecting plate, the longitudinal beam lower reinforcing plate is welded to the outer wall of the lower end of the longitudinal beam rear section body connecting plate, the rear portion of the longitudinal beam lower reinforcing plate is welded to the longitudinal beam lower reinforcing plate, the cross beam structure further comprises a cross beam, the cross beam is an n-shaped circular tube beam, a cross beam penetrating holeis formed in the longitudinal beam rear section body connecting plate, and the two ends of the cross beam penetrate through the cross beam penetrating hole respectively and are welded to the longitudinal beam rear section body connecting plate. The cross beam is divided into a welding section and a bent bearing section, and a brake cable support, a carbon tank support, a transmission shaft strap support and an oil filter support are welded to the welding section, so that the space requirement of the longitudinal beam in the Z direction is met to the maximum extent, installation of newly-addedparts is facilitated, the change amount of the longitudinal beam is reduced, the number of dies is reduced, and cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of automobile body-in-white structure, in particular, the invention relates to a crossbeam structure of the lower body of a micro-truck and a processing technology thereof. Background technique [0002] The lower body beam is one of the important stress-bearing parts of the body-in-white, which mainly plays the role of stability, load-bearing and improving the rigidity of the body-in-white. As an important force-bearing part, structural optimization is particularly important in its design. [0003] According to the different beam structures, the mainstream beam structures on the market are divided into two types: "ji"-shaped beams and round tube beams. [0004] Such as figure 1 As shown, the "Ji"-shaped beam is a sheet metal stamping part, which can be well matched with the surrounding parts, but the mold process is many and the cost is high. The material selection of the structural beam is generally high-...

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Problems solved by technology

[0004] like figure 1 As shown, the "Ji"-shaped beam is a sheet metal stamping part, which can be well matched with the surrounding parts, but the mold process is many and the cost is high. The material selection of the structural beam is generally high-strength steel plate. Larger, so there is also the problem that the precise size is not easy to control

[0005] like figure 2 As shown, the round tube structure of the round tube beam is widely used because of its good mechanical properties, convenient material procurement, simple mold and low cost, etc. 40mm or more), and welding brackets are required to connect with the longitudinal beam, which causes certain difficulties to the arrangement of the mounting parts on the round pipe and the design of the longitudinal beam structure welded with it, which is not conducive to the cooperation with the surrounding parts.

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