Mounting structure for rear axle and longitudinal girder of automobile

Abstract

The invention provides a mounting structure for a rear axle and a longitudinal girder of an automobile and belongs to the technical field of automobile parts. Problems of the existing assembling of poor quality and high cost are solved. The mounting structure for the rear axle and the longitudinal girder of the automobile comprises a bracket; the bracket is fixedly connected to the longitudinal girder through a bolt; the outer edge of the bracket is bent downwards to form a reinforcing turned-over edge; towards lower edges of two side parts of an automobile body, the reinforcing turned-over edge is respectively bent to the external side to form connecting turned-over edges; the connecting turned-over edges are provided with downward limiting surfaces; the end part of the rear axle is fixedly connected with a shaft tube; the outer walls of the two ends of the shaft tube are both provided with mounting surfaces; and the mounting surfaces at the two ends of the shaft tube are respectively propped against the limiting surfaces of the two connecting turned-over edges and fixedly connected with the limiting surfaces of the connecting turned-over edges through bolts. The mounting structure for the rear axle and the longitudinal girder of the automobile has the advantages that the rear axle is more convenient to detach and mount, the tooling cost is saved and the mounting position and angle of the rear axle are more accurate.

Description

technical field [0001] The invention belongs to the technical field of automobile parts, and relates to an installation structure of an automobile rear axle and a longitudinal beam. Background technique [0002] The rear axle mounting bracket is the connection medium between the rear axle and the vehicle body. Various loads borne by the rear axle are transmitted to the vehicle body through the rear axle mounting bracket. Therefore, this rear axle mounting bracket that acts as a "joint" is very important. In the traditional structure, the bracket connecting the rear axle is usually directly welded on the longitudinal beam. The welding stress between the longitudinal beam and the bracket is intricate, the welding deformation is large, and the positioning accuracy is poor. When the car is hit by a side collision or road obstacles, the bracket is deformed or even broken. , because there is no special vehicle welding tooling in the maintenance site, it is extremely difficult to p...

AI Technical Summary

Problems solved by technology

In the traditional structure, the bracket connecting the rear axle is usually directly welded on the longitudinal beam. The welding stress between the longitudinal beam and the bracket is intricate, the welding deformation is large, and the positioning accuracy is poor. When the car is hit by a side collision or road obstacles, the bracket is deformed or even broken. , because there is no special vehicle welding tooling in the maintenance site, it is extremely difficult to position the bracket during assembly and maintenance

For this reason appear as figure 1 In the rear axle installation structure, the bracket 2 is fixed on the longitudinal beam through bolts, and the rear axle 3 is installed on the bracket 2 through the fixing bolts 4, but the fixing bolts 4 are coaxial with the shaft tube 31 of the rear axle 3, and during the assembly process , the rear axle 3 is easy to rotate around the central axis of the shaft tube 31, thereby affecting the assembly posture of the rear axle 3, and in order to ensure the assembly posture of the rear axle 3, special assembly or sub-assembly tooling is required, resulting in low assembly efficiency and high assembly cost

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