JP2004019538A - Engine generator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem that the number of parts is increased because an exhaust pipe joint member connected to an exhaust pipe is supported by providing a separate supporting means in a vicinity of an outlet of the exhaust pipe of a conventional portable engine generator. <P>SOLUTION: In a portable engine generator with an engine and the generator or the like mounted in a casing 3, a fixing part to fix an exhaust pipe joint member 45 connected to an exhaust pipe 86 is provided on an exhaust pipe outlet 20 formed on one surface of the casing. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a portable engine generator that is used at a construction site or the like and generates electric power by an engine mounted therein, and particularly to a configuration of an exhaust unit.
[0002]
[Prior art]
Conventionally, the technology of a portable generator that is brought to a construction site or the like where there is no power supply nearby and operates a generator with an engine mounted inside to generate electric power and supply electric power to electric equipment is known. It has become.
An exhaust portion is provided on one side of the housing of the engine generator, and the soundproof cover, which is a constituent member, is provided with openings such as an exhaust pipe outlet and an exhaust port. It was provided on the upper surface of the housing. In the vicinity of the exhaust pipe outlet, an exhaust pipe for exhausting exhaust gas from the muffler is configured to protrude outward from the housing via an exhaust pipe joint member to perform exhaust, and the exhaust pipe joint is provided. The member is supported by providing a support means separately from the generator body. In addition, air outlets are provided on the top and side surfaces of the housing to exhaust hot air after cooling.
[0003]
[Problems to be solved by the invention]
However, in the vicinity of the exhaust pipe outlet of the conventional engine generator, since the exhaust pipe joint member connected to the exhaust pipe is separately provided and supported, supporting parts are increased. In addition, there is a problem that a load is applied to the support portion of the muffler unless the support means is provided. The exhaust pipe outlet is formed to have a diameter larger than that of the exhaust pipe, and a gap is formed between the exhaust pipe joint member and the soundproof cover. Had been released to
[0004]
[Means for Solving the Problems]
The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.
[0005]
That is, in the first aspect, in a portable engine generator in which an engine, a generator, and the like are housed in a housing, an exhaust pipe joint member connected to the exhaust pipe is fixed to an exhaust pipe outlet provided on one surface of the housing. Is provided.
[0006]
In claim 2, one of the exhaust pipe joint members is connected to an exhaust pipe, and the other is provided with a flange and fixed to the fixing portion.
[0007]
In claim 3, the gap between the exhaust pipe and the housing at the exhaust pipe outlet is sealed by the fixing portion.
[0008]
In a fourth aspect, a heat insulating material is provided in the fixing portion.
[0009]
According to claim 5, in a portable engine generator in which an engine, a generator, and the like are housed in a housing, an exhaust port is provided on an upper surface and a side surface of the housing, and one of the exhaust ports is closed by closing means. The closing means can be replaced with the other.
[0010]
According to a sixth aspect of the present invention, the closing means is configured in accordance with the size of the exhaust port on the side disadvantageous in terms of heat balance.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the invention will be described.
1 is a front view of the engine generator, FIG. 2 is a right side view thereof, FIG. 3 is a front view showing an internal structure of the engine generator, FIG. 4 is a plan view thereof, and FIG. 6 is a left side view, FIG. 7 is a plan view of the engine generator when the exhaust direction is horizontal, FIG. 8 is a left side view, and FIG. 9 is an exhaust pipe. A partial cross-sectional side view near the outlet, and FIG. 10 is a plan view of the same.
[0012]
First, an external configuration of the engine generator 1 will be described with reference to FIGS. 1 and 2. A base frame 10 is provided at a lower portion of the engine generator 1, and components of the engine generator 1 are provided on the base frame 10. A soundproof cover 19 is provided on the base frame 10 to improve the soundproofing effect. The generator frame 3 is composed of the base frame 10 and the soundproof cover 19.
[0013]
The engine generator 1 is provided with a control panel 2 on one short side and one door 4 and 5 on one long side. An intake port 6 for introducing outside air into the generator 1 is provided below the front of the opening and closing door 5, and an intake port 8 is provided on one long side of the engine generator 1. I have. These intake ports 6.8 are provided below the engine generator 1 and above the base frame 10.
[0014]
Further, the control panel 2 controls the engine generator 1 and displays an operation state. The electric power generated by the engine generator 1 is provided to an output terminal 25 located below the door 4. The output terminal 38 can be taken out by connecting a wire to the output terminal 38.
[0015]
Next, the structure inside the housing 3 of the engine generator 1 will be described with reference to FIGS. 3 and 4.
In the engine generator 1, an engine 11, a generator 12, a fuel tank 13, and a battery 14 are arranged. A generator 12 is connected to the engine 11, and the generator 12 is driven by an output shaft of the engine 11.
The engine 11 is disposed substantially at the center of the housing 3, a generator 12 is disposed on one side, a fuel tank 13 is disposed on the other side, and a battery 14 is disposed above the generator 12. .
[0016]
A partition wall 31 for reducing heat and noise transmitted to the control panel 2 is provided vertically on the side of the housing 3 of the generator 12. A mouth 8 is provided.
[0017]
A fan 21, a radiator 17, and mufflers 22 and 23 are arranged on the side of the engine 11 where the fuel tank 13 is arranged, and a guide 24 is arranged above the muffler 22. The guide 24 is for guiding the cooling exhaust air generated by the fan 21 to the exhaust port 30 side, and is disposed at an upper corner of the engine generator 1.
[0018]
An air cleaner 16 is arranged above the generator 12, and an intake chamber 18 is arranged above the air cleaner 16. The intake chamber 18 is fixed to the back surface of the ceiling portion of the housing 3, and the intake pipes 34 and 15 are connected to the intake chamber 18.
The air introduced into the intake chamber 18 via the intake pipe 34 is introduced into the air cleaner 16 via the intake pipe 15. Then, the air introduced into the air cleaner 16 is supplied to the engine 11.
[0019]
In the engine generator 1, the engine 11 and the generator 12 are attached to the base frame 10 via a vibration isolator. The base frame 10 is provided with a pedestal for mounting the engine 11 and the generator 12, and the engine 11 and the generator 12 are mounted on the pedestal via a vibration isolator so that the base 11 is transmitted to the base frame 10. The vibration generated by the soundproof cover 19 of the engine generator 1 is suppressed.
[0020]
An upper partition wall 35 is disposed above the engine 11, and a radiator 17 is attached to a radiator mounting portion 36 that is continuous with the upper partition wall 35, and a shielding plate 37 is connected to a lower portion of the radiator 17. ing.
The shielding plate 37 is disposed horizontally in the housing 3, the mufflers 22 and 23 are disposed above the shielding plate 37, and the fuel tank 13 is disposed below the shielding plate 37. A space surrounded by the upper partition wall 35, the radiator mounting portion 36, the radiator 17, the shielding plate 37, and the soundproof cover 19 is an exhaust portion, and houses the mufflers 22 and 23 and the like.
[0021]
Then, cooling air is generated from the engine 11 side toward the radiator 17 by the fan 21 interposed between the engine 11 and the radiator 17. The cooling air passing through the radiator 17 passes above the shielding plate 37 and reaches the upper portion of the engine generator 1. The cooling air is directed toward the front of the engine generator 1 by the guide 24, and is discharged to the outside of the housing 3 from the air outlet 30 along the upper partition 35.
[0022]
As shown in FIGS. 3 and 6, an exhaust port 40 is provided in the housing 3 on the side of the mufflers 22 and 23, and depending on a place where the engine generator 1 is installed, the upper exhaust port 30 or the upper exhaust port 30 is provided. One of the side exhaust ports 40 is closed by closing means and the other is opened, so that the exhaust direction can be selected. That is, as shown in FIGS. 5 and 6, by closing the side exhaust port 40 by the closing means and opening the upper exhaust port 30, the cooling air is discharged upward from the upper exhaust port 30 as described above. You. Similarly, as shown in FIGS. 7 and 8, by closing the upper exhaust port 30 by the closing means and opening the side exhaust port 40, the cooling air is discharged in the horizontal direction from the side exhaust port 40. .
[0023]
Here, an exhaust control plate 41 made of a metal plate or the like is used as the closing means. The air discharge control plate 41 is detachably attached to the housing 3 and has such a size that the upper air outlet 30 or the side air outlet 40 can be closed. And also serves as a means for closing the side exhaust port 40. The exhaust control plate 41 is configured in accordance with the size of the exhaust port having a large opening area, which is disadvantageous in terms of heat balance, in consideration of the heat balance during operation of the engine generator 1. -Even if the opening areas of the 40 are different, it can be closed.
Therefore, since the conventional configuration is such that the cover is covered with a separate exclusive cover, the number of parts increases, and it is not easy to change the exhaust port. However, an exhaust control plate that can be shared for both exhaust ports 30 and 40 is used. Only by attaching 41 to one exhaust air direction, the exhaust air direction can be selected, and the number of components can be reduced. Further, even when the engine generator 1 is in use, it is possible to easily change the exhaust direction by simply replacing the engine generator 1 without using any special parts. This replacement involves removing the bolts or screws, removing the exhaust air control plate 41 from the housing 3, and attaching the air exhaust control plate 41 to the other position with bolts or screws. Note that the air discharge control plate 41 is made of a steel plate or the like, and a sound absorbing material can be attached to the inner surface to enhance the soundproofing effect.
[0024]
Further, as described above, the upper partition wall 35, the radiator mounting portion 36, the shielding plate 37, and the guide 24 form an exhaust path using the inner surface of the soundproof cover 19 in the engine generator 1 to generate the engine power. By making the air exhaust path long while keeping the machine 1 compact, noise is reduced.
[0025]
Further, the inside of the housing 3 of the engine generator 1 is partitioned by the upper partition wall 35, the radiator mounting portion 36, and the shielding plate 37, and the engine 11 and the generator 12 are provided on one side, and the mufflers 22 and 23 are provided on the other side. By setting the side on which the engine 11 and the generator 12 are disposed on the upstream side of the cooling air, noise is reduced while improving the cooling efficiency in the engine generator 1.
[0026]
As shown in FIG. 3, the mufflers 22 and 23 have an elliptical shape in a side view, and are arranged with the elliptical surface facing the long side of the engine generator 1. The mufflers 22 and 23 are vertically arranged inside the housing 3, and the muffler 22 is arranged above the muffler 23. The mufflers 22 and 23 are disposed in front of the radiator 17 on the cooling air discharge side, and are fixed with the radiator 17 side lowered.
[0027]
A pipe 85 is connected to one of the left and right sides of the muffler 23, and the pipe 85 is connected to an exhaust manifold of the engine 11 through an opening provided in the radiator mounting portion 36. A pipe 84 is connected to the other side of the muffler 23, and a pipe 84 and an exhaust pipe 86 are connected to the muffler 22. The pipe 84 connects the muffler 22 and the muffler 23, and the exhaust pipe 86 discharges exhaust gas to the outside of the housing.
The exhaust gas of the engine 11 is introduced into the muffler 23 by the pipe 85 and enters the muffler 22 through the pipe 84. The exhaust gas that has passed through the muffler 22 is exhausted from the exhaust pipe 86.
The upper end of the exhaust pipe 86 is arranged so as to face the exhaust pipe outlet opened on the upper surface of the soundproof cover 19. However, since the exhaust pipe outlet is configured to be larger than the exhaust pipe 86, there is a problem that noise leaks. In addition, although the air is normally exhausted as it is, if there is an obstacle or the like above, the exhaust must be exhausted in another direction. At this time, if the extended exhaust pipe is directly connected to the exhaust pipe 86, a load is applied to the connection portion, and a load is also applied to the muffler and the like, causing a problem such as damage to the soundproof cover 19 and scorching of the paint by burning. It is necessary to separately provide an exhaust pipe joint member and connect an extended exhaust pipe (not shown).
[0028]
In the present invention, as shown in FIGS. 9 and 10, the exhaust pipe outlet 20 is provided on one surface of the housing 3, that is, the upper surface of the soundproof cover 19, and the exhaust pipe joint member 45 connected to the exhaust pipe 86 is fixed. Is provided. One end (lower part) of the exhaust joint member 45 penetrates through the exhaust pipe outlet 20 provided in the soundproof cover 19 and is inserted into the upper part of the exhaust pipe 86 so as to be inserted thereinto. The exhaust pipe 86 and the exhaust pipe joint member 45 are connected to each other and fixed to the upper end of the exhaust pipe 86. An upper portion of the exhaust pipe joint member 45 is projected outside the housing 3 and a flange 45a is formed at an upper end thereof. A plurality of bolt holes 45b are opened in the flange 45a to extend an exhaust pipe (not shown). Is fixed to a flange provided at one end with a bolt or the like so that it can be further extended.
[0029]
A stay 47 having a triangular shape in a plan view, which is a fixing means, is fixedly provided on the outer periphery of the middle part of the exhaust pipe joint member 45 by welding or the like. The stay 47 is arranged outside the soundproof cover 19 and has a bolt hole 47a at each apex on the outer periphery. Then, a bolt hole 19a serving as an exhaust pipe fixing portion is opened in the soundproof cover 19 around the exhaust pipe outlet 20 so as to correspond to the bolt hole 47a. It is fixed. In this way, the exhaust pipe joint member 45 is fixed to the soundproof cover 19 by the stay 47.
[0030]
Therefore, the exhaust pipe joint member 45 is provided with the flange 45a at the upper end and the stay 47 is integrally formed at the lower part, so that it is not necessary to provide a separate supporting means for supporting the exhaust pipe joint member 45. The number of parts can be reduced. Further, the load applied to the support portions of the mufflers 22 and 23 when the support means is not provided can be eliminated by the exhaust pipe joint member 45.
Further, in the vicinity of the exhaust pipe outlet 20, a stay 47 has a hermetically sealed structure in which the inside and outside of the engine generator 1 are reliably shut off, so that noise generated during operation from inside the housing 3 can be reduced. Also, leakage of hot air or the like can be prevented.
[0031]
Further, when the exhaust pipe joint member 45 that becomes high temperature is directly fixed to the soundproof cover 19 in the vicinity of the exhaust pipe outlet 20 of the soundproof cover 19, the temperature of the soundproof cover 19 becomes high, and the coating of the soundproof cover 19 may be scorched. Therefore, a heat insulating material 55 having the same shape as that of the stay 47 is interposed between the stay 47 of the exhaust pipe joint member 45 and the soundproof cover 19. Thereby, the heat of the exhaust pipe joint member 45 is not directly transmitted to the soundproof cover 19, and it is possible to prevent the paint of the soundproof cover 19 from burning.
[0032]
【The invention's effect】
The present invention is configured as described above, and has the following effects.
[0033]
That is, in a portable engine generator in which an engine, a generator, and the like are housed in a housing, an exhaust pipe joint member connected to the exhaust pipe is fixed to an exhaust pipe outlet provided on one surface of the housing. Is provided, it is not necessary to provide a separate support means for supporting the exhaust pipe joint member, and the number of parts can be reduced. Further, when the supporting means is not provided, the load applied to the supporting portion of the muffler by the exhaust pipe joint member can be eliminated.
[0034]
As described in claim 2, one of the exhaust pipe joint members is connected to the exhaust pipe, and the other is provided with a flange and fixed to the fixing portion. Therefore, a separate supporting means is provided to support the exhaust pipe joint member. Is unnecessary, and the number of parts can be reduced. Further, when the supporting means is not provided, the load applied to the supporting portion of the muffler by the exhaust pipe joint member can be eliminated.
[0035]
Since the gap between the exhaust pipe and the casing at the exhaust pipe outlet is sealed by the fixing part, noise during operation generated from the inside of the casing can be reduced. Leakage can be prevented.
[0036]
Since the heat insulating material is provided in the fixing portion, the heat of the exhaust pipe joint member is not directly transmitted to the soundproof cover, so that the coating of the soundproof cover can be prevented from burning.
[0037]
As described in claim 5, in a portable engine generator in which an engine, a generator, and the like are housed in a casing, an exhaust port is provided on an upper surface and a side surface of the casing, and one of the exhaust ports is closed by closing means, Since the closing means is configured to be replaceable with the other, the number of parts can be reduced. In addition, even when the engine generator is in use, the change of the exhaust air direction can be easily changed without requiring a special component.
[0038]
As described in claim 6, since the closing means is configured to match the size of the exhaust port on the side that is disadvantageous in terms of heat balance, even when the opening areas of the exhaust ports are different, the closing means can be attached to either exhaust port. Can be used.
[Brief description of the drawings]
FIG. 1 is a front view of an engine generator.
FIG. 2 is a right side view of the same.
FIG. 3 is a front view showing the internal structure of the engine generator.
FIG. 4 is a plan view of the same.
FIG. 5 is a plan view of the engine generator when the exhaust direction is a vertical direction.
FIG. 6 is a left side view of the same.
FIG. 7 is a plan view of the engine generator when the exhaust direction is a horizontal direction.
FIG. 8 is a left side view of the same.
FIG. 9 is a partial cross-sectional side view near the exhaust pipe outlet.
FIG. 10 is a plan view of the same.
[Explanation of symbols]
Reference Signs List 1 engine generator 3 housing 11 engine 12 generator 20 exhaust pipe outlet 45 exhaust pipe joint member 47 stay 86 exhaust pipe

Claims (6)

In a portable engine generator in which an engine and a generator are housed in a housing, a fixing portion for fixing an exhaust pipe joint member connected to the exhaust pipe is provided at an exhaust pipe outlet provided on one surface of the housing. An engine generator characterized by the following. The engine generator according to claim 1, wherein one of the exhaust pipe coupling members is connected to an exhaust pipe, and the other is provided with a flange and fixed to the fixing portion. The engine generator according to claim 1 or 2, wherein a gap between an exhaust pipe and a housing at an exhaust pipe outlet is sealed by the fixing portion. The engine generator according to claim 1 or 2, wherein a heat insulating material is provided in the fixing portion. In a portable engine generator in which an engine, a generator, and the like are housed in a housing, an exhaust port is provided on an upper surface and a side surface of the housing, and one of the exhaust ports is closed by a closing means, and the closing means is replaced with the other. An engine generator characterized by being configured to be capable. 6. The engine generator according to claim 5, wherein the closing means is configured in accordance with a size of an exhaust port on a side disadvantageous in terms of heat balance.

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