Exhaust pipe structure capable of eliminating welding stress

Abstract

The invention discloses an automobile exhaust pipe structure, and provides an exhaust pipe structure which is simple in structure and ingenious in conception, can eliminate welding stress and avoid breakage of welding ports of an inner pipe and an outer pipe of the exhaust pipe due to high temperature and low temperature alternation, and solves the technical problems that when an automobile runs in a cold area, the welding ports at the two ends of the exhaust pipe are easy to break due to the high temperature and low temperature alternation, the abnormal sound of the exhaust pipe is caused, and even seriously, the failure of the exhaust pipe is caused in the prior art. The exhaust pipe structure comprises an inner barrel and an outer barrel, wherein the inner barrel is coaxially sleeved and covered with the outer barrel; one end of the outer barrel is welded and fixed on the corresponding inner barrel; an elastic piece is sandwiched between an internal wall surface at the other end of the outer barrel and a corresponding external wall surface of the inner barrel; and the inner barrel is supported in the outer barrel by the elastic piece elastically.

Description

technical field [0001] The invention relates to an automobile exhaust pipe structure, in particular to an exhaust pipe structure for eliminating welding stress which can effectively prevent the inner and outer pipes on the exhaust pipe from breaking and failing at welding ports caused by alternation of high and low temperatures. Background technique [0002] Automobile exhaust pipes are generally composed of an inner pipe and an outer pipe coaxially welded on the outside of both ends of the inner pipe. When the car is running at room temperature, the car exhaust pipe can meet the normal use requirements, but the car is under low temperature regulations. Especially when driving in areas with relatively cold weather, because the exhaust pipe has a high operating temperature and the ambient temperature is extremely low, the alternation of high and low temperatures can easily cause the welding ports at both ends of the exhaust pipe to break due to inconsistent shrinkage of the in...

AI Technical Summary

Problems solved by technology

[0004] The present invention mainly provides an exhaust pipe structure with simple structure and ingenious conception, which can effectively prevent the welding port from breaking due to the high and low temperature alternation of the inner and outer pipes on the exhaust pipe, and solve the problem of the existing exhaust pipe structure. When the car in the technology is driving in a cold area, it is very easy to break the welding ports at both ends of the exhaust pipe due to the alternation of high and low temperature, which will lead to abnormal noise of the exhaust pipe, and even lead to failure of the exhaust pipe in severe cases. technical problem

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