JP6806664B2 - Muffler device - Google Patents

Description

The present invention relates to a muffler device, and more particularly to a muffler device applied to an engine of a portable generator.

Conventionally, a muffler device for silencing an engine has been known.
As such a muffler device, conventionally, for example, a technique has been provided in which an outer plate and a tubular outer shell for supporting each outer plate are provided, and the exhaust noise is reduced by reducing the exhaust energy in the muffler. It is disclosed (see, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2005-155551

The conventional technique is a technique relating to a muffler device for a vehicle engine. However, a generator that drives an engine and generates power by this driving force is known, and the above-mentioned conventional technique cannot be applied as it is as a muffler device for such a generator.
In particular, a portable generator needs to be equipped with a catalyst device in order to purify NOx, and is also required to be lightweight and compact.
The present invention has been made in view of the above points, and a lightweight and compact muffler device capable of installing a catalyst device in a limited space inside a generator and securing a sufficient capacity can be provided. The purpose is to provide.

In order to achieve the above object, the present invention provides a casing in a muffler device of a portable generator, and a first partition member for partitioning the inside of the casing into a first chamber and a second chamber inside the casing. And a second partition member is provided, and a catalyst device extending in the vertical direction is provided between the first partition member and the second partition member, and the catalyst device is the first partition member and the second partition member. The catalyst device is formed by bulging the first partition member and the second partition member by pressing, respectively, and the first partition member has a bulge for a catalyst. A bulge for the first catalyst that is slightly inclined with respect to the surface of the first partition plate is formed, and an inflow port that opens into the first chamber is formed at the lower end of the bulge for the first catalyst. When the second partition member is joined to the first partition member, the second catalyst bulge is slightly inclined with respect to the second partition plate at a position corresponding to the first catalyst bulge. A bulge is formed, and an outlet that opens into the second chamber is formed at the upper end of the bulge for the second catalyst .
According to the present invention, since the catalyst device is formed by the first partition member and the second partition member, the muffler capacity can be secured and sufficient rigidity can be secured with a simple structure. Can be done. In addition, the number of welded parts is small, and the exhaust gas can be easily sealed. Further, the catalyst device by the bulging portion for the catalyst can be easily formed only by pressing the first partition member and the second partition member.

In the above configuration, a diffuser pipe is provided between the first partition member and the second partition member, and the diffuser pipe is a diffuser formed by pressing the first partition member and the second partition member, respectively. It is characterized in that it is formed by a bulging portion for a pipe.
According to the present invention, it is possible to easily form a diffuser pipe by a bulging portion for a diffuser pipe only by pressing the first partition member and the second partition member.

In the above configuration, the diffuser pipe is composed of an outer cylinder and an inner cylinder arranged inside the outer cylinder, and a sound deadening material is housed between the outer cylinder and the inner cylinder. It is a feature.
According to the present invention, the exhaust noise flowing through the diffuser pipe can be efficiently reduced by the sound deadening material.

According to the present invention, since the catalyst device is formed by the first partition member and the second partition member by the first partition member and the second partition member, the muffler capacity can be secured with a simple structure. At the same time, sufficient rigidity can be ensured. In addition, the number of welded parts is small, and the exhaust gas can be easily sealed.

It is an external view which shows the embodiment of the generator to which the muffler device of this invention is applied. It is a front view of the muffler device of this embodiment. It is a side view of the muffler device of this embodiment. It is a front view which shows the 1st partition member of this embodiment. It is a front view which shows the 2nd partition member of this embodiment. It is sectional drawing in line AA of FIG. It is sectional drawing in BB line of FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a perspective view showing the appearance of a portable generator to which the muffler device according to the present invention is applied.
As shown in FIG. 1, the generator 1 includes a substantially rectangular parallelepiped housing 10, and an engine (not shown) and a muffler device 20 (see FIG. 2) are located below the housing 10. It is contained. Then, by driving the engine, it is possible to generate electricity via the alternator.

Further, a control panel 13 on which a power outlet 11 and an operation button 12 are arranged is mounted on one side surface of the housing 10.
Further, a handle 15 is provided on the upper surface of the housing 10, and a plurality of legs 16 for supporting the housing 10 are attached to the lower surface of the housing 10.

Next, the muffler device will be described.
FIG. 2 is a front view of the muffler device. FIG. 3 is a side view of the muffler device. FIG. 4 is a front view showing the first partition member. FIG. 5 is a front view showing the second partition member. FIG. 6 is a cross-sectional view taken along the line AA of FIG. FIG. 7 is a cross-sectional view taken along the line BB of FIG.

As shown in FIGS. 2 and 3, the muffler device 20 includes a casing 21, which is formed in an oval shape in a plan view and has a flat shape in the front-rear direction. The casing 21 includes a half-split first case member 22 and a second case member 23.
A flange portion 22a is formed on the outer periphery of the first case member 22, and a flange portion 23a is formed on the outer periphery of the second case member 23. Then, the casing 21 is formed by joining the flange portion 22a of the first case member 22 and the flange portion 23a of the second case member 23. In the present embodiment, the casing 21 is installed vertically.

An exhaust pipe 60 is connected to the upper side of the second case member 23, and a tail pipe pipe 61 for connecting a tail pipe (not shown) is connected to the upper center of the first case member 22. It is provided.
In the present embodiment, by connecting the exhaust pipe 60 to the upper part of the casing 21, the cooling air of the engine can be applied to the exhaust pipe 60, and the temperature of the exhaust gas of the engine flowing through the exhaust pipe 60 is lowered. Is possible.
A mounting flange 27 is formed on the lower surface of the casing 21 so as to project downward.

As shown in FIGS. 4 to 7, the first partition member 30 and the second partition member 31 are housed inside the casing 21. The first partition member 30 and the second partition member 31 are joined to each other, and the first partition member 30 and the second partition member 31 are joined to each other, and the first case member 22 and the second case member 23 are joined to each other. It is sandwiched and supported by.
The inside of the casing 21 is partitioned by a first partition member 30 and a second partition member 31 into a first chamber 32 on the side of the first case member 22 and a second chamber 33 on the side of the second case member 23.

As shown in FIG. 4, the first partition member 30 is formed with a slightly inclined first catalyst bulging portion 40 extending in the vertical direction. An inflow port 36 is formed at the lower end of the bulging portion 40 for the first catalyst.
A bulge 41 for the first diffuser pipe is formed on one side of the bulge 40 for the first catalyst of the first partition member 30. The first partition member 30 is formed with a bulging portion 42 for the first third chamber adjacent to the bulging portion 41 for the first diffuser pipe.
A substantially square-shaped first bulge for exhaust 43 is formed above the bulge 41 for the first diffuser pipe of the first partition plate.

The first exhaust bulging portion 43 is provided with a tail pipe pipe 61 projecting outward from the first case member.
Further, an exhaust communication hole 44 through which the exhaust pipe 60 is passed is formed in the upper part of the first partition member 30.
The bulging portion 40 for the first catalyst, the bulging portion 41 for the first diffuser pipe, the bulging portion 43 for the first third chamber, and the bulging portion 43 for the first exhaust are integrally formed by press working or the like. ing.

As shown in FIG. 5, the second partition member 31 is formed with a second catalyst bulge 45 at a position corresponding to the first catalyst bulge 40 when joined with the first partition member 30. Has been done. An outlet 37 is formed at the upper end of the second catalyst bulge 45.
A bulge 46 for the second diffuser pipe is formed at a position corresponding to the bulge 41 for the first diffuser pipe of the second partition plate.
The second partition member 31 is formed with a bulge 47 for the second and third chambers adjacent to the bulge 46 for the second diffuser pipe. The second partition member 31 is formed with a second exhaust bulge 48 at a position corresponding to the first exhaust bulge 43.
Further, a plurality of pores 47a formed by punching are formed in the bulging portion 47 for the second and third chambers.

Further, an exhaust pipe connecting portion 49 corresponding to the exhaust communication hole 44 and connecting the exhaust pipe 60 is formed on the upper portion of the second partition member 31.
The second catalyst bulge 45, the second diffuser pipe bulge 46, the second exhaust bulge 48, the second third chamber bulge 47, the exhaust pipe connection 49, and the pores 47a are , It is integrally formed by press working.

With the first partition member 30 and the second partition member 31 joined, as shown in FIGS. 6 and 7, the bulge 42 for the first third chamber and the bulge 47 for the second third chamber The third chamber 34 is formed. Further, the catalyst device 35 is formed at a position where the bulging portion 40 for the first catalyst and the bulging portion 45 for the second catalyst are joined. The diffuser pipe 50 is formed at a position where the bulging portion 41 for the first diffuser pipe and the bulging portion 46 for the second diffuser pipe are joined.
The exhaust portion 58 is formed at a portion where the first exhaust bulge portion 43 and the second exhaust bulge portion 48 are joined.

The diffuser pipe 50 is composed of an outer cylinder 51 and an inner cylinder 52, and the inner cylinder 52 is formed with pores 53 made of a large number of punches. The outer cylinder 51 and the inner cylinder 52 are integrally formed above and below the outer cylinder 51 by welding or the like. Glass wool 56 as a sound deadening material is housed between the outer cylinder 51 and the inner cylinder 52.
An arrester 55 is arranged inside the tail pipe pipe 61.
In the present embodiment, since the arrester 55 is arranged inside the tail pipe pipe 61, it is possible to reduce the size while maintaining the muffling function.

With this configuration, the exhaust gas flows into the first chamber 32 via the exhaust pipe 60 and flows into the inflow port 36 of the catalyst device 35. The exhaust gas that has passed through the catalyst device 35 flows into the second chamber from the outflow port 37, and flows into the third chamber 34 through the pores.
The exhaust gas that has flowed into the third chamber 34 flows into the diffuser pipe 50 and comes into contact with the glass wool 56 when moving back and forth between the outer cylinder 51 and the inner cylinder 52 of the diffuser pipe 50 through the pores, resulting in airflow noise. And vibration noise are reduced.

The muffler device 20 of the present embodiment is attached to the generator 1 by screwing the mounting flange 27 to, for example, the crankcase of the engine and screwing the exhaust pipe 60.
Then, the muffler device 20 can be easily removed only by removing each screw. As a result, maintenance of the muffler device 20 can be easily performed.

Next, the operation of the muffler device 20 configured in this way will be described.
The exhaust gas generated from the engine first flows into the first chamber 32 of the casing 21 via the exhaust pipe 60 and the exhaust connection portion. At this time, by connecting the exhaust pipe 60 to the upper part of the casing 21, the exhaust gas can flow into the casing 21 in a state where the temperature of the exhaust gas is lowered by effectively utilizing the cooling air of the engine.

The exhaust gas that has flowed into the first chamber 32 flows into the inside of the catalyst device 35 from the inflow port 36 of the catalyst device 35, passes through the catalyst device 35, and then flows into the second chamber 33 through the outflow port 37.
At this time, since the exhaust pipe connecting portion 49 is arranged above the first partition member 30 and the inflow port 36 of the catalyst device 35 is arranged below the first partition member 30, the exhaust gas flowing into the first chamber 32 is discharged. A wide space can be secured before entering the catalyst device 35, whereby the high-temperature exhaust gas flowing from the exhaust pipe 60 into the first chamber 32 is cooled by the time it flows into the catalyst device 35. As a result, it is possible to prevent the catalyst device 35 from being deteriorated by the high temperature exhaust gas.

The exhaust gas that has flowed into the second chamber 33 flows into the third chamber 34 through the pores of the third chamber 34.
The exhaust gas that has flowed into the third chamber 34 flows into the diffuser pipe 50 and comes into contact with the glass wool 56 when moving back and forth between the outer cylinder 51 and the inner cylinder 52 of the diffuser pipe 50 through the pores, resulting in airflow noise. And vibration noise are reduced.
Then, the exhaust gas flowing through the diffuser pipe 50 is discharged to the outside from the tail pipe via the arrester 55.

In the present embodiment, the catalyst device 35, the diffuser pipe 50, the third chamber 34, and the like are formed by pressing the first partition member 30 and the second partition member 31, so that the structure is simple. , The muffler capacity from the first chamber 32 to the third chamber 34 can be secured, and sufficient rigidity can be secured.
Further, since the holding structure of the catalyst device 35 and the diffuser pipe 50 is formed by the first partition member 30 and the second partition member 31, the catalyst device 35 and the diffuser pipe 50 can be attached without using extra parts. Therefore, the internal space of the casing 21 can be effectively utilized, and noise can be reduced. In addition, the number of welded parts is small, and the exhaust gas can be easily sealed.

As described above, in the present embodiment, the casing 21 is provided, the first partition member 30 and the second partition member 31 are provided inside the casing 21, and the first partition member 30 and the second partition member 31 are provided. A catalyst device 35 is provided between them, and the catalyst device 35 is formed by joining the first partition member 30 and the second partition member 31.
As a result, the catalyst device 35 is formed by the first partition member 30 and the second partition member 31, so that the muffler capacity can be secured and sufficient rigidity can be secured with a simple structure. Can be done. In addition, the number of welded parts is small, and the exhaust gas can be easily sealed.

Further, in the present embodiment, the catalyst device 35 has a first catalyst bulging portion and a second catalyst bulging portion 45 (which are formed by bulging the first partition member 30 and the second partition member 31 by press working, respectively. It is formed by a bulge for a catalyst).
As a result, the catalyst device 35 by the bulging portion for the first catalyst and the bulging portion for the second catalyst 45 can be easily formed only by pressing the first partition member 30 and the second partition member 31.

Further, in the present embodiment, the diffuser pipe 50 is provided between the first partition member 30 and the second partition member 31, and the diffuser pipe 50 presses the first partition member 30 and the second partition member 31, respectively. It is formed by a bulging portion 41 for a first diffuser pipe and a bulging portion 46 for a second diffuser pipe (bulging portion for a diffuser pipe).
As a result, the diffuser pipe 50 by the bulging portion 41 for the first diffuser pipe and the bulging portion 46 for the second diffuser pipe can be easily formed only by pressing the first partition member 30 and the second partition member 31. Can be done.

Further, in the present embodiment, the diffuser pipe 50 is composed of an outer cylinder 51 and an inner cylinder 52 arranged inside the outer cylinder 51, and a glass wool 56 (glass wool 56) is used between the outer cylinder 51 and the inner cylinder 52. Sound deadening material) is housed.
As a result, the glass wool 56 can efficiently reduce the exhaust noise flowing through the diffuser pipe 50.

The present invention is not limited to the one described in the above embodiment, and various modifications and changes can be made without departing from the spirit of the present invention.

1 Generator 20 Muffler device 21 Casing 22 1st case member 23 2nd case member 30 1st partition member 31 2nd partition member 32 1st room 33 2nd room 34 3rd room 35 Catalyst device 40 1st catalyst bulge Part 41 1st diffuser pipe bulge 42 1st 3rd chamber bulge 43 1st exhaust bulge 45 2nd catalyst bulge 46 2nd diffuser pipe bulge 47 2nd 3rd Room bulge 48 Second exhaust bulge 49 Exhaust pipe connection 50 Diffuser pipe 51 Outer cylinder 52 Inner cylinder 53 Pore 55 Arrester 56 Glass wool 60 Exhaust pipe 61 Tail pipe

Claims (3)

In the muffler device of a portable generator
A casing is provided, and a first partition member and a second partition member for partitioning the inside of the casing into a first chamber and a second chamber are provided inside the casing.
A catalyst device extending in the vertical direction is provided between the first partition member and the second partition member.
The catalyst device is formed by joining the first partition member and the second partition member.
The catalyst device is formed by a bulging portion for a catalyst formed by bulging the first partition member and the second partition member by press working.
The first partition member is formed with a bulge for the first catalyst that is slightly inclined with respect to the surface of the first partition plate, and the lower end of the bulge for the first catalyst is the first chamber. An inflow port is formed to open to
When the second partition member is joined to the first partition member, the bulge for the second catalyst is slightly inclined with respect to the second partition plate at a position corresponding to the bulge for the first catalyst. A muffler device characterized in that a portion is formed, and an outlet opening to the second chamber is formed at an upper end portion of the bulging portion for the second catalyst . A diffuser pipe is provided between the first partition member and the second partition member.
The muffler device according to claim 1 , wherein the diffuser pipe is formed by a bulging portion for a diffuser pipe formed by bulging the first partition member and the second partition member by press working . A claim characterized in that the diffuser pipe is composed of an outer cylinder and an inner cylinder arranged inside the outer cylinder, and a sound deadening material is accommodated between the outer cylinder and the inner cylinder. The muffler device according to claim 1 or 2.

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