Vehicle muffler

Abstract

The invention discloses a vehicle muffler. The vehicle muffler comprises a cylinder body, an air inlet pipe and an air exhaust pipe which are in mutual fit. A drain hole is formed at the bottommost point of the cylinder body, a rivet is fixedly inserted in the drain hole, and a through hole penetrates through the middle of the rivet in the radial direction of the rivet. The cylinder body comprises an inner casing and an outer casing, wherein the inner casing and the outer casing are sleeved on the cylinder body from inside to outside, cling to each other tightly and are fixed in a riveting mode through the rivet. During work, accumulated water in the cylinder body is drained through the through hole and can be drained thoroughly and effectively as the rivet is located at the bottommost point of the cylinder body. Meanwhile, the inner casing and the outer casing are fixed in a riveting mode through the rivet so that the inner casing and the outer casing are ensured to cling to each other tightly and not to have water immersion, and further the corrosion resistance and the work reliability of the vehicle muffler are remarkably improved. In addition, the double-layer casing structure improves the muffling performance of the vehicle muffler.

Description

Technical field [0001] The invention relates to the technical field of motor vehicle accessories, in particular to a motor vehicle muffler. Background technique [0002] The muffler is one of the important functional components of the motor vehicle, and with the continuous improvement of the use demand, the work performance of the muffler has also received widespread attention. [0003] At present, in the existing muffler assembly structure, in order to avoid corrosion and perforation of the cylinder body, two methods are usually adopted to drain the water inside the cylinder by means of internal intubation drainage or perforation and drainage at the lowest point of the single-layer cylinder. Under normal circumstances, when the inner cannula is used for drainage of the cylinder, the inner cannula is required to be arranged in the high-pressure cavity inside the cylinder, but the high-pressure cavity is not necessarily the deepest part of the cylinder volume water, which makes it i...

AI Technical Summary

Problems solved by technology

Under normal circumstances, when the cylinder is drained with an internal intubation tube, the internal intubation is required to be arranged in the high-pressure cavity inside the cylinder, but the high-pressure cavity is not necessarily the deepest part of the cylinder, which makes it impossible to completely drain the accumulated water; if using The method of punching holes at the lowest point of the single-layer cylinder can drain the accumulated water, but there is a problem of poor sound attenuation performance of the single-layer cylinder, and it is easy to cause the radiation noise of the cylinder to exceed the standard

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