Automobile body and auxiliary frame installing structure

Abstract

The invention discloses an automobile body and auxiliary frame installing structure. The automobile body and auxiliary frame installing structure comprises an automobile body, an auxiliary frame, an auxiliary frame connecting bolt and a nut, wherein the auxiliary frame connecting bolt penetrates through the automobile body and the auxiliary frame to be tightly connected with the nut in a screwed mode. The automobile body and auxiliary frame installing structure is characterized in that a groove is formed in the automobile body, an automobile body bolt hole is located in the middle of the groove, the installing structure is further provided with a reinforcing plate, the middle of the reinforcing plate is a concave part, the concave part is installed in the groove in a matched mode, the periphery of the reinforcing plate and the automobile body are welded together, a bolt hole is formed in the middle of the concave part of the reinforcing plate, and a bolt rotating preventing boss is arranged by the side of the bolt hole. Due to the arrangement of the reinforcing plate, strength of connecting and tightening portions of the automobile body and the auxiliary frame can be improved, bolt compressing force can be evenly dispersed within a large-area range, and the phenomenon that the automobile bodydeforms or is damaged partially because tightening force of the bolt is too large is avoided. Furthermore, because the bolt rotating preventing boss is arranged on the reinforcing plate, the auxiliary frame connecting bolt can be effectively prevented from rotating in the screwing process, assembly operation is simplified and assembly efficiency is improved.

Description

technical field [0001] The invention relates to an installation structure for automobile parts, in particular to an installation structure for an automobile body and a sub-frame, and belongs to the technical field of automobiles. Background technique [0002] The sub-frame of the car is a bracket that supports the front and rear axles and suspensions, so that the axles and suspensions are connected to the "positive frame" through it. The application of the sub-frame can improve the connection stiffness of the suspension system and attenuate the vibration of the road surface. At the same time, the appearance of the sub-frame turns the suspension into an assembly component, which improves the versatility of the suspension and reduces the cost of research and development and assembly. The installation structure of the sub-frame and the body is an important factor affecting the connection performance of the body and the sub-frame. At present, the body is fixed to the sub-frame t...

AI Technical Summary

Problems solved by technology

The problem with this common installation structure is: in order to ensure the reliability of the connection, the tightening force of the bolt (or nut) is relatively large during assembly, and even if the gasket is used, there is still the problem of excessive local pressure.

The body is a thin-walled part. In severe cases, local deformation or crushing of the body will occur, which will affect the strength of the body itself and the reliability of the connection between the body and the sub-frame.

In addition, the mounting bolts of the sub-frame are relatively long. If the projection welding nuts are welded on the vehicle body, and then the sub-frame is fixed on the vehicle body by tightening the bolts, it is difficult to find the position of the projection welding nuts during the assembly process, and During the tightening process, it is difficult to coincide with the center line of the bolt and the nut, which is easy to cause slippage; if the bolts are installed on the vehicle body, and then the sub-frame is installed by tightening the nuts, there will be a problem that the bolts follow the rotation during the tightening process

The above problems affect the assembly efficiency of the body and sub-frame

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