Welded assembly of lower cross beam of car

Abstract

The invention discloses a welded assembly of a lower cross beam of a car. The welded assembly comprises a lower cross beam body and two mounting threaded pipes which are respectively vertically fixedly connected on the left end part and the right end part of the lower cross beam body, and is characterized in that a first cross beam reinforcement assembly is sheathed outside the mounting threaded pipe at the left end part of the lower cross beam body, and a second cross beam reinforcement assembly is sheathed on the mounting threaded pipe at the right end part of the lower cross beam body; and the structures of the second cross beam reinforcement assembly and the first cross beam reinforcement assembly are the same and in bilateral symmetry. According to the welded assembly disclosed by the invention, as the lower cross beam body is made of a material with higher strength, the strength is improved; as the lower cross beam body and a vehicle body form a closed loop structure and transversely penetrate a whole lower vehicle body, the lower vehicle body of the vehicle body can have sufficient strength and rigidity; and as the structures are designed to be symmetrical, the universality is good and the cost is saved. Not only are the requirements on the strength and the rigidity of a vehicle satisfied, but also good installation and a simple structure effect are realized.

Description

technical field [0001] The invention relates to an automobile body structure, in particular to a welding assembly for a lower beam of an automobile. Background technique [0002] The car body structure has been greatly improved with the development of science and technology, but there are some problems such as the simple structure of the beam assembly and the irregular selection of materials, which have different degrees of influence on the strength and installation of the car body. [0003] The welding assembly of the lower beam is a component that strengthens the strength of the vehicle body and provides bracket installation. At present, it usually consists of a combination of a separate welded beam (side beam) and a mounting nut box, or directly adds a mounting point on the lower beam body of the vehicle body. During the welding (or assembly) process, due to the limitation of strength and structure, the service life is short and the safety is insufficient, which caus...

AI Technical Summary

Problems solved by technology

During the welding (or assembly) process, due to the limitation of strength and structure, the service life is short and the safety is insufficient, thus causing deformation and failure of parts

[0004] At the same time, the crossbeam structure design of the domestic automobile body is simple, and some designs are not closely integrated with the body, only considering its own strength, which reduces the performance of the whole vehicle

Moreover, the reliability of the installation form is not high. The combination with the installation nut box or the direct nut installation method all have the problems of insufficient installation strength and poor accuracy; at the same time, the improper selection of the material of the beam results in insufficient strength of the parts themselves. Or the waste of cost not only fails to meet the requirements of the body, but also has a serious impact on its installation performance

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