Automotive rear sub-frame mounting point structure

Abstract

The invention provides an automobile rear sub-frame mounting point structure which is capable of reinforcing the automobile body connection strength and rigidity and reliable in connection. The structure comprises a rear floor and a rear longitudinal beam outer plate, the rear longitudinal beam outer plate and the rear floor are in butt joint to form a cavity structure which is internally provided with a reinforcing unit connecting the rear floor with the rear longitudinal beam outer plate, the reinforcing unit comprises a reinforcing plate connected with the rear longitudinal beam outer plate through spot welding, the reinforcing plate is welded to a mounting support through a nut base, the mounting support is fixedly connected with the rear floor, and a bolt sequentially penetrates through a mounting hole formed in the rear longitudinal beam outer plate, a mounting hole formed in the reinforcing plate, an internal thread hole of the nut base to fixedly connect the rear longitudinal beam outer plate with the reinforcing unit. By means of a reinforcing plate and mounting support combined welding structure, a cross section cavity is formed, the middle of the cross section cavity is connected and supported through the nut base, the mounting support can ensure full lap joint with the rear longitudinal beam outer plate, the reinforcing plate and the rear floor, the load-carrying path is reasonable, enough strength is guaranteed, and the rigidity of a rear sub-frame mounting point can be further improved.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to an automobile rear sub-frame mounting point structure. Background technique [0002] The rear floor of the car is the support of the entire rear suspension. The rear suspension is connected to the rear floor through bushes and bolts, and then connected to the body through the rear floor. The road load is transmitted to the entire rear suspension through the wheels, and a part of the load of the rear suspension is transmitted to the vehicle body through the sub-frame on the vehicle body. Higher strength and support stiffness requirements. In recent years, electric vehicles have developed rapidly. Many electric vehicles are designed on the basis of the original fuel vehicles. The load at the point will be higher. Considering the continuity of the parts, more allowance should be left for the structural strength at the rear floor installation point. There are two main connection methods...

AI Technical Summary

Problems solved by technology

Although the mounting bracket and peripheral parts of this structure form a cavity cross-section structure, the area where the mounting bracket is welded to other parts is small, which easily leads to cracking and other strength problems, and the rigidity cannot be improved to a greater extent.

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