Rear subframe and automobile body connection structure of automobile

Abstract

The invention discloses a rear subframe and automobile body connection structure of an automobile, and the connection structure provided by the invention comprises a rear subframe and an automobile body and is characterized in that the rear subframe and the automobile body are connected by virtue of a mounting bracket assembly; the rear subframe and the mounting bracket assembly are welded by virtues of bolts; and the mounting bracket assembly is connected with the automobile body by virtue of turnup welding. Compared with the prior art, the rear subframe and automobile body connection structure has the following advantages: the mounting bracket assembly serves as the connection part of the rear subframe and the automobile body; the rear subframe and the automobile body are connected by bolts and nut sleeves on the one hand and are also connected by virtue of turnup welding on the other hand; the connection points of the mounting bracket assembly and the automobile body are respectively positioned on the upper turnup of a bracket body, opening ends on two edges and the turnup on a reinforcement plate; and a connection point with the automobile body is added, so that the maximum load which can be borne by the rear subframe is increased. The rear subframe and automobile body connection structure is reasonable and simple, enough strength is guaranteed, the NVH (Noise Vibration and Harshness) performance and rigidity of the whole automobile are improved, and the mounting precision of the rear subframe can be guaranteed.

Description

technical field [0001] The invention relates to a mounting device for a rear sub-frame of an automobile, in particular to a connection structure between a rear sub-frame and a vehicle body of an automobile. Background technique [0002] The sub-frame of an automobile is a bracket that supports the front and rear axles and suspensions, so that the axles and suspensions are connected to the body through it, and has the function of blocking vibration and noise. The sub-frame of an automobile is a very important component, and it has high requirements on the body structure of the area where it is attached. Therefore, the structure of the car body connected to the sub-frame and the surrounding bearing parts, and the The design of the connection method is particularly important. [0003] In the prior art, the connection between the sub-frame and the vehicle body is generally by bolts and nuts, the main way is to use the nut plate 13 and the nut box 12 to cooperate, the base of th...

AI Technical Summary

Problems solved by technology

The shape of the nut plate of this structure is square, the side length is about 30mm, and the thickness is 5mm. Due to the limitation of the structure of the nut plate itself, the connection length between the nut plate and the bolt is not long enough, only 14.5mm (such as figure 2 ), which cannot meet the impact force requirements of mid-to-high-end models, and there is no guiding effect during bolt installation, and it is easy to cause bolt installation failure due to slipping wires

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