A connection structure between an automobile exhaust system and a vehicle frame

Abstract

The invention relates to the technical field of automobile assembly, and discloses a connecting structure of an automobile exhaust system and an automobile frame. In the connecting structure, an automobile frame end support is fixedly arranged on the automobile frame, an exhaust system end support is fixedly arranged on the exhaust system, the automobile frame end support and the exhaust system end support are connected by connecting bolts, a first rubber gasket is arranged at the connecting part of the automobile frame end support and the exhaust system end support, a first groove for placing the first rubber gasket is formed in one side, close to the automobile frame end support, of the exhaust system end support, and the first rubber gasket is contacted with the peripheral wall of the first groove. By adopting the structure, the rubber gasket can improve shock insulation in all directions, furthermore, relatively large shear force can be prevented from being generated on the surface of the rubber gasket, the rubber gasket is prevented from being damaged, and the service life of the rubber gasket is prolonged.

Description

technical field [0001] The invention relates to the technical field of vehicle assembly, in particular to a connection structure between an automobile exhaust system and a vehicle frame. Background technique [0002] In the whole vehicle, in order to ensure the safe and reliable operation of the exhaust system, a flexible connection is often used between the exhaust system and the frame to isolate the vibration transmitted from the road to the exhaust system through the frame. [0003] Such as figure 1 As shown, it is one of the existing flexible connection methods. The frame end bracket 11 and the exhaust system end bracket 12 are connected by bolts, and the joint is provided with a first rubber pad 13 and a second rubber pad 14. A rubber pad 13 and the inside of the second rubber pad 14 are provided with a spacer 15, and the bolt 16 passes through the spacer 15 and is tightened with a nut 17, and the nut 17 is connected to the first rubber pad. An upper gasket 18 is prov...

AI Technical Summary

Problems solved by technology

[0004] This connection structure, in the Z direction, the rubber pad is in surface contact with the frame end bracket 11, so it has a good isolation effect on the vibration in the Z direction; but in the X and Y directions, the rubber pad and the The frame end bracket 11 is approximately in line contact, and the vibration isolation effect is poor for the vibration transmitted by the frame in these two directions, and the line contact will generate a large shear stress on the rubber pad, and the shear stress Will destroy the structure of the rubber pad

[0005] figure 2 Another flexible connection method in the prior art is given. The frame end bracket 11 and the exhaust system end bracket 12 are connected in the horizontal direction by two sets of bolts, and rubber pads are provided at the connection. This connection structure, in X In the Y direction, the rubber pad and the frame end bracket 11 have a good vibration isolation effect on the vibration transmitted by the frame through surface contact; but in the Y direction, the rubber pad is still in contact with the frame end bracket 11. Larger shear stress is generated; in the Z direction, the force transmission between the frame end bracket 11 and the exhaust system end bracket 12 is carried out through bolt friction, which is similar to a rigid connection, that is, this mechanism basically has no gap in the Z direction. Vibration

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