KR100743604B1 - muffler structure for vehicle - Google Patents

Abstract

The contents of the publication are for attaching the inner end plates to both ends of the muffler body, such as a vehicle equipped with an internal combustion engine, a heavy construction equipment, a ship, etc., and the outer body and the outer end plate of the muffler. The inner end plate is fixed by fitting to improve the appearance of the muffler and minimize the noise caused by the defect of the fixing part.

The vehicle muffler structure according to the present invention includes an intake pipe into which exhaust gas flows from an engine, an exhaust pipe for discharging exhaust gas to the outside, and a baffle plate formed to collide and cancel a noise wavelength of the exhaust gas. In the vehicle muffler structure,

Inner end plate ends are tightly fitted between the muffler outer body and the outer end plate so as to seal both ends of the muffler.

Heavy equipment, vehicle, muffler structure, interference fit

Description

Muffler structure for vehicle

1 is a schematic diagram of a typical muffler,

2 is an excerpt excerpt of the muffler structure according to the prior art,

3 is an essential part excerpt of the vehicle muffler structure according to the present invention;

4 is a state diagram used in the muffler structure for a vehicle according to the present invention.

* Explanation of symbols used in the main part of the drawing

10; Muffler

11; Inner end plate

12; Outer body

13; Inner body

14; Outer end plate

15; Baffle plate

16; Suction pipe

17; Exhaust pipe

In the present invention, when attaching an inner end plate to both ends of a muffler body such as a vehicle equipped with an internal combustion engine, a heavy construction equipment, a ship, etc., the appearance of the muffler is changed from a welding fixing method to an interference fit. The present invention relates to a vehicle muffler structure capable of improving quality and extending service life.

More specifically, the inner end plate is forcibly fixed between the outer body and the outer end plate of the muffler to improve the appearance of the muffler and to fix the defect of the fixed part. It relates to a vehicle muffler structure to minimize the generation of noise caused by.

In general, the muffler has the principle that when the pressure wavelength flows in a certain direction with a given frequency and amplitude, and the same wavelength flows in the opposite direction to the initial wavelength, the two wavelengths collide with each other to cancel the energy and significantly reduce the amplitude. In this case, the exhaust gas introduced into the muffler reduces the noise by causing the pressure wave itself to be sent back to collide while expanding and compressing.

As shown in FIG. 1, in the general muffler structure, when the exhaust gas generated from the engine (not shown) is introduced into the muffler 2 through the suction pipe 1, the exhaust gas is formed in the primary baffle plate. It diffuses until it reaches the wall of (3), and the diffused exhaust gas is installed between the primary baffle plate 3 and the secondary baffle plate 4 and passes through the pipe 5 in which a plurality of holes are formed. Expanded, the expanded exhaust gas is discharged to the atmosphere through the exhaust pipe (6).

As shown in FIG. 2, the muffler structure according to the related art is formed on the inner surface of the outer body 12 when the inner end plate 11 that seals both ends of the muffler 10 is fixed to the muffler outer body 12. The inner endplate 11 was fixed by welding (say "A" site).

In the drawings, reference numeral 13 denotes a muffler inner body, 14 denotes an outer end plate fixed to the muffler outer body 12, and 15 denotes an exhaust gas flowing into the muffler 10 through the suction pipe 16 from the engine. At least one baffle plate is formed by maintaining a predetermined interval so as to reduce the noise emitted to the atmosphere through the exhaust pipe 17 by colliding and canceling the noise wavelengths.

In the conventional muffler structure, when a crack is generated due to a defective work on the welded portion of the outer body 12 and the inner end plate 11 described above, a part of the exhaust gas leaks through the cracked portion, thereby increasing noise. The driver suffers from noise.

In addition, due to the welding defects due to the welding work, the disadvantages of welding, the appearance quality of the muffler 10 is significantly reduced, the material forming the muffler 10 is made of a thin plate outer body 12 and the inner end plate (11) has a problem in that the welded portion is weak when the fixing by welding, the mechanical strength and durability are poor.

An object of the present invention, in fixing the inner end plate to seal the both ends of the muffler body, by tightening the inner end plate between the outer body and the outer end plate of the muffler to improve the appearance quality of the muffler, fixing It is to provide a muffler structure for a vehicle to minimize the noise generated by the site defect.

Another object of the present invention is to provide a vehicle muffler structure which can extend the service life by improving the mechanical strength and durability at the fixing portion by forcibly fitting the tight portion of the muffler body and the inner end plate. .

The object of the present invention described above is for a vehicle including an intake pipe into which exhaust gas flows from an engine, an exhaust pipe for discharging the exhaust gas to the outside, and a baffle plate formed to collide and cancel the noise wavelength of the exhaust gas. In the muffler structure,

An inner end plate end is press-fitted between the muffler outer body and the outer end plate so as to seal the both ends of the muffler, thereby providing a vehicle muffler structure.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings, which are intended to describe in detail enough to enable those skilled in the art to easily practice the invention, and therefore It does not mean that the technical spirit and scope of the present invention is limited.

As shown in Figure 3 and 4, the vehicle muffler structure according to the present invention, the intake pipe 16 through which the exhaust gas flows from the engine (not shown), and the exhaust gas noise is reduced to the atmosphere In the vehicle muffler structure comprising a plurality of baffle plates (15) formed so as to collide and cancel the noise wavelength of the exhaust gas to be made,

The end 11a of the inner end plate 11 is forcibly fitted between the muffler outer body 12 and the outer end plate 14 so as to seal both ends of the muffler 10.

In this case, the plurality of baffle plates 15 installed at predetermined intervals inside the muffler inner body 13 and the outer end plate 14 fixed to seal both ends of the outer body 12 are illustrated in FIG. 2. Since they are applied in substantially the same manner, detailed description thereof will be omitted, and the same reference numerals as those in FIG. 2 will be described.

Hereinafter, a use example of a vehicle muffler structure according to the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 4, when the exhaust gas generated from the engine not shown is introduced into the muffler 10 through the suction pipe 16, the exhaust gas is divided by several baffle plates 15. Since the noise frequency collides and cancels while passing through the compartment, noise emitted to the atmosphere through the exhaust pipe 17 can be reduced.

On the other hand, when fixing the inner end plate 11 with respect to the outer body 12 so as to seal the left and right both ends of the muffler 10 described above, the end 11a of the inner end plate 11 and the outer body 12 and the outer body 12 are fixed. By tightly fitting the gap between the outer end plate 14 and fixing it tightly, the appearance quality at the contact portion of the outer body 12 and the inner end plate 11 is superior to the welding fixing method, and the interference fit area is also Since the mechanical strength and durability are improved relative to the welding fixing method, the service life can be extended.

In addition, due to the characteristics of parts, the outer body 12 and the inner end plate 11 of the muffler 10, which mainly use thin materials, are tightly fixed to each other by tightly fitting, so that the tightness of the fixing part is excellent and the fitting part is fixed. Through this, it is possible to block the generation of noise due to leakage of the exhaust gas.

As described above, the vehicle muffler structure according to the present invention has the following advantages.

In fixing the inner end plate to seal the both ends of the muffler body, the inner end plate is tightly fixed between the outer body and the outer end plate of the muffler to improve the appearance of the muffler, and the noise caused by the defect of the fixing part is fixed. The reliability of the equipment can be increased by minimizing the

In addition, by tightly fixing the close contact between the muffler body and the inner end plate, it is possible to extend the service life by improving the mechanical strength and durability relative to the welding fixing method.

Claims (1)

In a vehicle muffler structure comprising an intake pipe into which exhaust gas flows from an engine, an exhaust pipe for discharging exhaust gas to the outside, and a baffle plate formed to collide and cancel the noise wavelength of the exhaust gas: A muffler structure for a vehicle, characterized in that the inner end plate ends are tightly fitted between the muffler outer body and the outer end plate so as to seal both ends of the muffler.

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