Fixing structure for exhaust pipes

Abstract

The invention provides a fixing structure for exhaust pipes, comprising a rear longitudinal beam, a rear floor, a first exhaust pipe mounting support, a first exhaust pipe mounting hook, a second exhaust pipe mounting hook, a second exhaust pipe mounting support and a rear anti-collision beam. The rear anti-collision beam is connected with the rear longitudinal beam and the rear floor. The first exhaust pipe mounting support and the second exhaust pipe mounting support are both connected with the rear anti-collision beam. The first exhaust pipe mounting hook is disposed on the first exhaust pipe mounting support. The second exhaust pipe mounting hook is disposed on the second exhaust pipe mounting support. The fixing structure has the advantages that dynamic stiffness of the fixing structure is greatly improved, the problem that shaking of the exhaust pipe easily causes resonance and shaking of the floor during running of a vehicle is avoided, electro-coating is sufficient, and the sufficient electrophoretic paint film ensures rust resistance of the fixing structure.

Description

technical field [0001] The invention relates to an automobile body, in particular to an exhaust pipe fixing structure in the automobile body. Background technique [0002] The installation point structure of the exhaust pipe is one of the important hard point structures of the body-in-white. The quality of its structure directly affects the use and vibration of the exhaust pipe, and the durability and reliability of the fixed point of the exhaust pipe. If the structure is not good, the rigidity of the installation point is insufficient, and the shaking movement of the exhaust pipe in the left, right, up and down directions will cause durable cracking of the fixed points of the body, and even cause the exhaust pipe to fall off after the fixing fails, affecting the normal use of the vehicle. The structure of the traditional car exhaust pipe installation point is as follows Figure 1 to Figure 2 As shown, it includes exhaust pipe installation hook 1, rear floor 2, exhaust pipe ...

AI Technical Summary

Problems solved by technology

[0003] The main disadvantages of the prior art are: 1. The fixed points of the exhaust pipe are generally designed symmetrically, and it is more common to arrange them symmetrically on the rear longitudinal beam 4 and the rear floor 2

The rigidity on the rear longitudinal beam 4 is easy to ensure, but the rigidity on the rear floor 2 is relatively poor, because the material thickness of the rear floor 2 is thin, and the shaking of the exhaust pipe during the driving of the vehicle is likely to cause resonance and vibration of the rear floor 2; 2. The exhaust pipe The structural strength is poor, and the solder joints are easy to crack; 3. In order to improve the rigidity of the mounting point on the rear floor 2, the thickness of the exhaust pipe mounting bracket 3 will be selected to be a relatively large structure, which is heavy and expensive; 4. The rear floor 2. The closed cavity structure of the fixed point of the exhaust pipe cannot ensure sufficient electrophoresis in the cavity, and the electrophoretic fluid will remain in the cavity, and there is a high risk of rusting directly in contact with moisture outside the vehicle at the bottom of the vehicle

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