JPH10196389A - Outside air introduction structure of engine generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an engine generator with an outside air introduction structure simple in structure, large in noise reduction effect and hardly invaded by dust, etc. SOLUTION: In the outside air introduction structure for cooling an engine generator in which an engine and a generator are disposed side by side inside a housing frame 7 which has side face plates 3, 4, 5, 6, in front, rear, left and right, and a bottom plate 30, an outside air introduction duct 31 is provided which forms a flow passage in a direction parallel to the engine and the generator at a lower surface of the bottom plate 30. An outside air introduction port 44 is provided at an approximate center of the outside air introduction duct 31. At the bottom plate corresponding to both ends of the outside air introduction duct 31, openings 75, 76, and 77 are provided for supplying outside air to the engine 45 side and generator side, and means 8 for forming space between an mounting face of the engine generator and the bottom plate 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine generator serving as a power source for various working machines and lightings, and more particularly to an external air introducing structure for cooling the generator.

[0002]

2. Description of the Related Art A conventional outside air introduction structure in an engine generator is disclosed in Japanese Utility Model Publication No. 2-32836 and Japanese Utility Model Laid-Open Publication No.
No. 125620.

[0003] In the structure disclosed in Japanese Utility Model Publication No. 2-32836, a rectangular tubular duct having both ends opened at the lower portion of each of an engine and a generator is provided on the bottom of the housing.
Outside air is introduced into the housing through the duct. Further, in the structure described in Japanese Utility Model Laid-Open No. 4-125620, an intake duct is provided at the upper part of the housing, and outside air is branched from the intake duct and supplied to the engine and the generator.

[0004]

However, in the structure disclosed in Japanese Utility Model Publication No. 2-32836, since the ducts are provided separately for the engine and the generator, the number of parts increases and the shape becomes complicated. As a result, manufacturing becomes troublesome. Further, since the length of the duct is short, internal noise easily leaks and the soundproofing effect is small, and dust and the like easily enter the inside, and there is a high possibility of performance deterioration, maintenance is troublesome, and the frequency of the maintenance is increased.

In the structure described in Japanese Utility Model Laid-Open No. 4-125620, a duct is provided at the upper portion of the housing and an outside air inlet is formed at the upper surface thereof, so that dust is easily sucked into the inside and noise inside the housing is reduced. It is a structure that is easily radiated to the outside and has a small soundproofing effect. Also, the structure described in this publication has a structure in which the length of the intake passage in the duct is short as in the structure described in the publication, so that the noise effect is small and dust and the like easily enter inside.

SUMMARY OF THE INVENTION The present invention has been made to address the above-mentioned drawbacks of the known structure, and has as its object to provide an outside air introduction structure for an engine generator having a simple structure, a large soundproofing effect, and less entry of dust and the like.

[0007]

In order to achieve the above object, according to the present invention, there is provided a cooling system for an engine generator in which an engine and a generator are installed in parallel in a housing frame having front, rear, left and right side plates and a bottom plate. In the outside air introduction structure for use, an outside air introduction duct that forms a flow passage in the direction parallel to the engine and the generator is provided on the lower surface of the bottom plate, and an outside air introduction port is provided substantially at the center of the outside air introduction duct. An opening for supplying outside air to the engine side and the generator side respectively at the bottom plate located at both ends of the bottom plate, and means for forming a space between the installation surface of the engine generator and the bottom plate. The present invention provides an outside air introduction structure for an engine generator.

According to this configuration, the outside air is supplied to the engine and the generator by a single simple duct, and the entire engine generator can be cooled with a simple structure, and the number of parts can be reduced. In addition, the length of the duct passage can be extended by separating the opening of the duct from the opening of the bottom plate, and the amount of noise leaking from the inside to the outside through the duct can be reduced, and the soundproofing effect can be enhanced. Intrusion of dust and the like can be suppressed, and sufficient performance can be maintained.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In a preferred embodiment,
A partition wall for branching the introduced outside air into the engine cylinder side and the air cleaner side is provided at an opening for introducing outside air to the engine provided in the bottom plate.

According to this structure, the layout of the engine cooling structure can be realized with a simple structure, sufficient outside air can be supplied to each of the engine cylinder side and the air cleaner side, and the engine performance can be improved.

In a further preferred embodiment, the outside air introduction duct comprises a box body having the outside air introduction port on the lower surface, the entire upper surface being open and the peripheral side surface being covered. And a cover attached to the lower surface of the bottom plate so as to cover the opening on the generator side.

According to this structure, the duct structure can be simplified, and the sheet metal can be easily manufactured by punching press work or bending work, so that the cost can be reduced, and a strong box body whose peripheral side surface is covered is provided. Due to its shape, it has sufficient strength against external force such as impact, and a highly reliable function is maintained.

[0013]

1A and 1B are perspective views respectively showing a front side and a rear side of an engine generator according to an embodiment of the present invention. First, an outline of the configuration of the present embodiment will be described with reference to FIG. 1, and then details of each unit will be described with reference to FIG.

The engine generator 1 includes left and right pipe frames 2, four side plates of a front plate 3, a right side plate 4, a rear plate 5, and a left side plate 6 fastened to the pipe frames 2, and a bottom plate. (Not shown) constitutes a rectangular parallelepiped housing frame 7 whose upper surface is open. Each pipe frame 2 has an inverted U-shape, and straight portions on both sides thereof are riveted by inserting a lower pipe 2b into an upper pipe 2a (see FIG. 6). These pipes 2a, 2b
Constitute support members provided at four corners of the housing frame 7.
The side plates 3 to 6 and the bottom plate are fixed to these support members (pipes 2a and 2b) by bolts via brackets (not shown).

Four casters 8 are mounted on the bottom plate of the housing frame 7. With these casters 8, the engine generator can be moved on an installation surface such as the ground,
A space for taking in outside air is secured between the engine generator and the installation surface. The fuel tank 9 is mounted and fixed on the housing frame 7 so that the upper opening of the housing frame 7 is closed by the fuel tank 9. The fuel tank 9 has a flange 10 around the side surface thereof. The flange 10 is fixed by screws with the flange 10 exposed on the upper surface of the housing frame 7. A cap 11 is provided at the center of the upper surface of the fuel tank 9. An overflow guide groove 12 is formed leftward from the periphery of the cap 11. The overflowed fuel flows in the guide groove 12, passes through the side surface of the housing frame, and is discharged to the ground. At this time, as described below,
The sealing material (not shown) provided on the lower surface of the tank flange 10 prevents fuel from entering the housing frame 7 from below the flange.

The front panel 3 has an operation panel 1 having an engine start key switch hole, a power outlet, and the like.
3. A licoryl starter 14, a battery box 15, and an inspection door 16 for manually starting the engine are provided. The right side plate 4 is provided with an auxiliary cover 17 for covering a muffler and a silencer (both not shown) exposed from the right side plate 4 to the outside. This auxiliary cover 17
Covers the high-temperature silencer and muffler exposed to the outside of the housing frame, obtains a soundproof effect, and also serves as a ventilation guide for the cooling air, and allows the cooling air to flow along the muffler and the silencer for efficient cooling. Inspection door 18 on rear panel 5
The left side plate 6 is provided with an inspection door 19.

FIG. 2 is a front view of the engine generator 1. The operation panel 13 of the front panel 3 includes two power outlets 20, a breaker 21, an engine start key switch hole 22, a choke button 23, and the like. Each outlet 20 is, for example, an outlet for taking out a current of 15 A, and is configured to be able to take out a current of, for example, 23 A in total. Therefore, the breaker 21 is turned off when it exceeds 23A. The engine of this generator, like a normal automobile engine, inserts a key into the key switch hole 22 to turn it from off to on, and then rotates to a starter position to rotate the internal cell motor and start the engine. Let it. The engine can be started manually by pulling the licoryl starter with this switch on.

FIG. 3 is a cutaway side view of the left side of the engine generator. The fuel tank 9 is divided into upper and lower parts,
The upper half 9a and the lower half 9b are combined at their respective flange portions. Therefore, the flange 10 around the fuel tank 9 has a structure in which two upper and lower flanges are actually welded (in the figure, a single integrated flange is shown). A sealing material 24 made of rubber or other elastic material is attached to the lower surface of the flange 10. The support frame 25, through which the entire flange 10 of the fuel tank 9 forms an upper opening edge of the housing frame 7, via the sealing material 24.
a to 25d (see FIG. 8). The flange 10 is provided at its four corners via washers (not shown).
It is fastened and fixed to the support frames 25a to 25d by bolts 26. In this case, the washer functions as a spacer for securing the thickness of the sealing material 24. For example, by using a 2mm thick washer for a 3mm thick sealing material, the
Is elastically deformed from 3 mm to 2 mm to achieve a reliable sealing action. By providing such a sealing material 24, fuel leaked during refueling is prevented from entering the inside from the lower surface of the flange through the upper opening of the housing frame 7, and internal engine noise is leaked to the outside through the opening. And noise is reduced.

Thus, the upper half 9a of the fuel tank 9 is
By supporting the flange 10 on the housing frame 7 with the and the flange 10 exposed on the housing frame 7, only the lower half 9 b of the fuel tank 9 is covered in the housing frame 7. Attached, the capacity of the entire tank can be increased, and the shape of the lower half portion 9b can be formed in accordance with the arrangement of each member of the internal engine generator without deteriorating the appearance, which is efficient. Space can be used. Further, since the flange 10 protruding around the tank is supported in an exposed state without being covered by the housing frame 7, the fuel tank 9 can be removed alone without removing the side plates 3 to 6 of the housing frame 7. Thus, the upper surface of the housing frame can be easily opened to perform the internal inspection work.

A cock 27 is provided on the lower surface of the fuel tank 9, and when the cock 27 is opened, the fuel supply port 2 is opened.
Fuel is supplied to a vaporizer (not shown) through a hose (not shown) via 8. When removing the fuel tank 9, the inspection door 19 (see FIG. 1) of the left side plate 6 is opened, the cock 27 is closed, the hose communicating with the vaporizer is removed, and the bolt 26 fixing the fuel tank 9 is removed. And remove this fuel tank.

At the end of the crankshaft (not shown) of the engine is provided a rope 14b connected to a handle 14a (FIG. 2) of the licoryl starter 14, and a number of holes for rectifying and introducing cooling air. A cylindrical case 47 having a 48 is mounted (see FIG. 5).

On the lower surface of the bottom plate 30 of the housing frame 7, a cooling air intake duct 31 is provided. The outside air intake duct 31 is formed by stamping or bending a sheet metal, and supplies cooling air to the engine side and the generator side as described later. The cooling air to the engine side is divided by a partition wall 32 (see FIG. 9) into a cylinder side passage 33 and an air cleaner side passage 34, and the air in the air cleaner side passage 34 is supplied to an air cleaner 36 via an outside air introduction pipe 35. In this case, the outside air is forcibly sucked into the engine cylinder side by a fan 58 (FIG. 7) described later. However, by providing such a partition wall 32, the outside air is not entirely sucked to the cylinder side and the air cleaner is sucked. Sufficient outside air is introduced to the 36 to maintain high engine performance.

FIG. 4 is a cutaway side view showing the right side of the engine generator 1. As shown in FIG. 7 described later,
An end of the muffler 37 projects outside the right side plate 4, and a second muffler (silencer) 38 is connected to the muffler 37. Auxiliary cover 1 covering these mufflers 37, 38
7 is provided with a vent hole 39a on the side surface, and a vent duct 40 on the lower side. The ventilation duct 40 communicates with a ventilation hole 39b (see FIGS. 7 and 9) provided on the lower surface of the auxiliary cover 17, and discharges air cooled from the silencer 38 from below. The outlet 40a of the ventilation duct 40 is provided slightly upward as shown in FIG. 2, and prevents natural air such as plants from being protected by preventing hot air from being blown directly to the ground.

The battery box 15 is fixed to the front plate 3 by bolts 41. A battery 42 is mounted in the battery box 15 by a rubber band 43. The rubber band 43 has a photograph 43a, and by grasping this photograph, the locking ring 43b at the end is hooked on the case side 43c.
To fix the battery. The battery 42 is mounted on the front panel 3 so as to protrude partially outward from the housing frame 7, and the protruding portion is formed from the outside of the front panel to a battery box 15 forming a battery cover.
Covered with. In this example, the battery is fixed inside the battery box 15 itself, and the battery 42 is removed at the same time by removing the battery box 15 during maintenance such as inspection and maintenance.

In the above configuration, a cell motor 66 (FIG. 7) and a battery 42 for starting an engine, which will be described later, are disposed near the operation plate 13 on which the wiring terminals and various electronic components are collectively disposed. In addition, the wiring for connecting the battery and the cell motor is shortened, the wiring work can be easily performed, and a compact structure is realized. In addition, since the battery is mounted at a position distant from the engine, thermal influence from the engine is reduced, and performance degradation is prevented. Further, since the battery is mounted by projecting from the front plate of the housing frame, the battery can be compactly arranged without increasing the size of the housing frame itself and without being restricted by the internal configuration. In addition, by removing the battery box (cover), the battery can be easily inspected and detached, so that the maintainability and maintenance workability are improved.

Since the operation plate 13 is provided above the front plate 3 and the battery 42 is provided at the center of the front plate in the vertical direction, inspection and maintenance work can be performed in an easy posture. And work becomes easier.

FIG. 5 is an internal structural view of the engine generator 1 as viewed from the rear. At the center of the outside air intake duct 31 attached to the lower surface of the bottom plate 30, an opening (outside air introduction port) 44 for outside air intake is formed. The outside air taken in from the opening 44 is divided into two directions, the engine side V1 and the generator side V2, and flows into the housing frame 7. An air-cooled single-cylinder OHV engine 45 is installed in the housing frame 7. As described above with reference to FIG. 3, the outside air introduced from the outside air intake duct 31 and guided to the engine side is divided into the air cleaner side and the cylinder side by the partition plate 32, and the outside air on the cylinder side passes through the hole 47 of the cylindrical case 48. It flows into the engine 45. An exhaust pipe 49 of the engine 45 is connected to the muffler 37. The muffler 37 is a flexible exhaust pipe 5 described later.
0 and connected to a silencer 38 (see FIGS. 4 and 7).

FIG. 6 is a structural view of the inside of the housing frame 7 similar to FIG. 5, and shows a state in which the muffler 37 is removed. A generator 51 is installed adjacent to the engine 45. The generator 51 includes a stator 53 and a rotor 5 rotating around its inner periphery.
The rotor rotating shaft 54 is directly connected to a crankshaft (not shown) of the engine 45 by taper fitting. As described above, the outside air (V2) introduced from the outside air intake duct 31 and guided to the generator side flows through the inside of the generator 51 and is discharged from the exhaust port 55 to the outside of the generator. As shown clearly in FIG. 6, the upper end of the lower pipe 2b is inserted into the lower end of the upper pipe 2a of the pipe frame 2, and is fixed with rivets 56.

FIG. 7 is a plan view showing the inside of the housing frame 7 as viewed from above. A vertical (vertical) bracket 57 is welded to the pipe frame 2 including the upper pipe 2a and the lower pipe 2b at the four corners of the housing frame 7,
The front plate 3, the right side plate 4, the rear plate 5, and the left side plate 6 are bolted to these brackets 57.

The cooling air on the engine side is introduced into the engine case by the fan 58, passes through the space between the fins 59 of the cylinder head, and is discharged from the opening 67 to the outside of the engine. On the other hand, the cooling air on the generator 51 side is
1 and is discharged from the exhaust port 55 to the outside of the generator 51. The cooling air discharged outside the engine and the generator 51 is introduced into the muffler cover 61 and
Flows into the auxiliary cover 17 through the opening 62. As described above, the cooling air flowing into the auxiliary cover 17 is discharged to the outside through the ventilation hole 39a on the side surface and the ventilation hole 39b on the lower surface.

The muffler 37 is fixed to the generator 51 via a muffler stay 65, and the muffler cover 61 is also fixed to the generator 51. The silencer 38 is fixed to the outer surface of the right side plate 4. The auxiliary cover 17 is fixed to the right side plate 4 by bolts so as to cover the protruding ends of the silencer 38 and the muffler 37. The engine 45 and the generator 51 are integrally connected and a rubber mount 74 (FIG. 6,
It is mounted and fixed on the bottom plate 30 of the housing frame via FIG. 8). Therefore, the muffler 37 is integrally coupled with the engine and the generator and vibrates, and the silencer 38 fixed to the side plate 4 forms a different vibration system.
The muffler 37 and the silencer 38 are connected by using a flexible exhaust pipe 50 described later in order to effectively absorb such another system vibration.

The muffler 37 which communicates with the engine 45 via the exhaust pipe 49 further communicates with the silencer 38 via a flexible exhaust pipe 50 which is bent in an L-shape as shown. The exhaust gas is exhausted to the outside through the exhaust port 63 of the silencer 38 and the opening 64 of the auxiliary cover 17 (see FIGS. 1 and 4). A cap 89 having a screen 88 (see FIG. 5) made of a wire mesh or the like is attached to the exhaust port 63. Each straight portion of the L-shaped flexible exhaust pipe 50 is provided with a flexible pipe 50a (vibrating in the front-rear and up-down directions) and a flexible pipe 50b (vibrating in the left-right and up-down directions) for absorbing vibration in a direction perpendicular to the longitudinal direction of the pipe. .
Through such a flexible exhaust pipe 50, the muffler 37
By connecting the silencer 38, vibrations in all directions are absorbed, an effective vibration damping action is obtained, and noise due to the vibrations is suppressed.

A starter motor 66 is provided above the engine 45. In addition, a constant power generation frequency (50 Hz or 6
0 Hz), the engine speed is always constant (300 Hz).
A governor mechanism 69 is connected to the carburetor 68 to maintain at 0 rpm or 3600 rpm). 67 is an air cleaner. The fuel pipe 70 of the vaporizer 68 communicates with the fuel supply port 28 (FIG. 3) of the fuel cock 27 of the fuel tank 9 via a fuel hose (not shown).

FIG. 8 is a top view of the housing frame 7 with the fuel tank, engine, and generator removed.
As described above, the support frames 25a, 25b, 25c, 25d welded in a rectangular shape are formed on the upper part of the pipe frame 2.
Is provided. These support frames 25a, 25b,
Reference numerals 25c and 25d each have an L-shaped cross section. A flange 10 of the fuel tank 9 is mounted on a horizontal portion thereof, and is fixed by bolts 26 (see FIGS. 2 to 6) through mounting holes 71 at four corners. The engine 45 and the generator 51 are connected to the bottom plate 3.
It is mounted and fixed on a rubber mount 74 on a support base 72 provided on the support base 72 (see FIGS. 5 and 6).

FIG. 9 is a bottom view of the engine generator 1. The four casters 8 are attached to the bottom plate 30, and the above-described outside air intake duct 31 is attached to a central portion thereof. An opening 44 is formed substantially at the center of the outside air intake duct 31, and an opening 75 for introducing outside air into the inside is formed in the bottom plate 30 at the right end thereof. As described above, the bottom plate 30 at the left end of the outside air intake duct 31 is formed with the opening 76 on the engine cylinder side and the opening 77 on the air cleaner side partitioned by the partition plate 32.

The bottom plate 30 further includes an auxiliary outside air intake duct 78 having openings 79 on the rear and front sides and an opening 8.
2 is provided. The outside air from these auxiliary outside air intake ducts 78 and 81 is
The air is introduced into the housing frame 7 to cool the entire air in the frame, and is sucked into the generator to cool the generator together with the outside air from the duct 31 provided on the bottom plate 30 described above. This is because the high-temperature engine is cooled only by the low-temperature outside air from the duct 31 provided on the bottom plate 30, but the air in the housing frame is also used as cooling air for the generator that does not become hot compared to the engine. is there.

These auxiliary outside air intake ducts 78, 81
The outside air intake duct 31 is formed in a box shape having an upper surface opened and four surrounding sides covered by a sheet metal press or bending process, and a bottom plate 30 having openings 79, 82, and 44 on the lower surface for introducing outside air. Bolted to the underside of the By using the outside air intake duct having such a shape, the strength is increased, the soundproofing effect is enhanced, and the intrusion of dust into the inside is prevented.

Similarly to the above-mentioned outside air intake duct 31, openings 80 and 83 are formed in the bottom plate 30 corresponding to the openings 79 and 82 of the auxiliary outside air intake ducts 78 and 81, respectively. . Thus, the openings 75, 76, 77, 80 and 83 are provided on the bottom plate 30 side by displacing the positions with the respective openings 44, 79 and 82 of the outside air intake ducts 31, 78 and 81 provided on the lower surface side of the bottom plate 30. By
Leakage of engine noise in the housing frame to the outside through the opening is suppressed, and soundproofing is enhanced.

FIG. 10 is a rear view of the operation panel 13 as viewed from the direction F in FIG. This drawing shows a wiring layout in the case where an on / off switch for starting the engine that enables the recoil starter 14 is provided instead of the key switch 22 driven by the starter motor shown in FIG. The two power outlets 20 (see FIG. 2) are connected to the cable 8
4 to the generator. Chalk button 23
(See FIG. 2) is connected to the vaporizer via a choke wire 85. The back surfaces of the outlet 20 and the breaker 21 are covered with a flameproof sheet 29 made of flame-resistant fiber manufactured by firing and carbonizing special acrylic fiber, and insulate the electrode terminals from the surroundings. Such a flameproof sheet 29 is fixed, for example, by bonding both upper and lower edges to the operation panel 13 with a double-sided adhesive tape.

FIG. 11 is a sectional view showing another configuration example of the battery box. In the above-described embodiment, as shown in FIG. 4, the battery 42 is mounted on the inside of the cover itself constituting the battery box 15 by the rubber band 43, but in the embodiment of FIG. A battery holding frame 86 is provided on the rubber frame 43.
The structure is fixed by. Therefore, in this example, only the cover forming the battery box 15 can be removed alone.

Further, in the engine generator of this embodiment,
As shown in each figure, a sponge-shaped sound absorbing sheet 8 made of urethane resin or the like, which is indicated by hatching on the lower surface of the fuel tank and other places.
7 is attached to suppress noise. Such a sound-absorbing sheet 87 is cut into an appropriate shape in accordance with the place to be stuck, and is appropriately stuck using a double-sided tape or the like. In the above-described embodiment, the case frame 7 is a rectangular parallelepiped box shape having a rectangular horizontal section and four side plates. However, the case frame 7 may be a case having another polygonal cross section or a case having a circular or oval cross section. Good.

[0042]

As described above, according to the present invention, the outside air is supplied to the engine and the generator by a single simple duct, and the entire engine generator can be cooled with a simple structure and the number of parts can be reduced. Can be achieved. In addition, the length of the duct passage can be extended by separating the opening of the duct from the opening of the bottom plate, and the amount of noise leaking from the inside to the outside through the duct can be reduced, and the soundproofing effect can be enhanced. Intrusion of dust and the like can be suppressed, and sufficient performance can be maintained.

Further, according to the structure in which the partition wall for branching the introduced outside air into the engine cylinder side and the air cleaner side is provided in the opening for introducing outside air to the engine side provided in the bottom plate, a simple structure is provided. As a result, the layout of the engine cooling structure can be realized, sufficient external air can be supplied to the engine cylinder side and the air cleaner side, and the engine performance can be improved.

Further, the configuration of the outside air introduction duct is constituted by a box having the outside air introduction port on the lower surface, the entire upper surface being open and the peripheral side being covered, and this box is connected to the engine side and the generator side. If it is configured to cover the opening of the bottom plate and to be mounted on the lower surface side of the bottom plate, the duct structure can be simplified, and it can be easily manufactured by punching press work or bending work of a sheet metal, and cost reduction can be achieved. Due to the strong box shape with the side surfaces covered, it has sufficient strength against external force such as impact and the like, and a highly reliable function is maintained.

[Brief description of the drawings]

1A and 1B are perspective views respectively showing a front side and a rear side of an engine generator according to an embodiment of the present invention.

FIG. 2 is a front view of the engine generator of FIG. 1;

FIG. 3 is a cutaway side view of the left side of the engine generator of FIG. 1;

FIG. 4 is a cutaway side view of the right side of the engine generator of FIG. 1;

FIG. 5 is an internal configuration diagram of the engine generator shown in FIG. 1 as viewed from the rear side.

FIG. 6 is an internal configuration diagram of the engine generator shown in FIG. 1 from which a muffler is removed as viewed from a rear surface thereof.

FIG. 7 is a plan view of the inside of the engine generator of FIG. 1 when viewed from above.

FIG. 8 is a top view of the engine generator shown in FIG. 1 with a fuel tank, an engine, and a generator removed.

FIG. 9 is a bottom view of the engine generator of FIG. 1;

FIG. 10 is a rear view of the operation panel 13 viewed from a direction F in FIG. 3;

FIG. 11 is a sectional view showing another configuration example of the battery box of the engine generator according to the present invention.

[Explanation of symbols]

1: engine generator, 2: pipe frame, 2a: upper pipe, 2b: lower pipe, 3: front plate, 4: right side plate, 5: rear plate, 6: left side plate, 7: housing frame,
8: caster, 9: fuel tank, 10: flange, 1
1: cap, 12: overflow guide groove, 13:
Operation panel, 14: recoil starter, 15: battery box, 16: inspection door, 17: auxiliary cover, 18,
19: Inspection door, 20: Power outlet, 2
1: Breaker, 22: Key switch hole, 23: Choke button, 24: Seal material, 25a, 25b, 25c, 2
5d: support frame, 26: bolt, 27: fuel cock, 28: fuel supply port, 29: flameproof sheet, 30: bottom plate, 31: outside air intake duct, 32: partition plate, 33: cylinder side passage, 34: air cleaner Side passage, 35: outside air introduction pipe, 36: air cleaner, 37: muffler, 3
8: Silencer (second muffler), 39a, 39b: vent, 40: vent duct, 40a: outlet, 41: bolt, 42: battery, 43: rubber band, 43a: shooting, 43b: locking ring, 43c: hook, 44: opening, 45: engine, 47: hole, 48: cylindrical case, 4
9: exhaust pipe, 50: flexible exhaust pipe, 50a, 50
b: flexible tube, 51: generator, 52: rotor, 5
3: stator, 54: rotor rotating shaft, 55: exhaust port, 5
6: rivet, 57: bracket, 58: fan, 5
9: fin, 60: fan, 61: muffler cover, 6
2: opening, 63: exhaust port, 64: opening, 65: muffler stay, 66: cell motor, 67: opening, 68: vaporizer,
69: governor mechanism, 70: fuel pipe, 71: mounting hole, 72: support base, 74: rubber mount, 75, 7
6, 77: opening, 78: auxiliary outside air intake duct, 79,
80: opening, 81: auxiliary outside air intake duct, 82, 8
3: opening, 84: cable, 85: choke wire, 8
6: holding frame, 87: sound absorbing sheet, 88: screen, 89: cap.

Continued on the front page (51) Int.Cl. ⁶ Identification code FI F16M 1/00 F16M 1/00 G

Claims (3)

[Claims] An engine / generator cooling air introduction structure in which an engine and a generator are installed in parallel in a housing frame having front, rear, left and right side plates and a bottom plate, wherein an engine and a power generator are provided on a lower surface of the bottom plate. An outside air introduction duct that forms a flow passage in a direction parallel to the machine, an outside air introduction port is provided at a substantially central portion of the outside air introduction duct, and an engine side and a generator side are provided on the bottom plate at both ends of the outside air introduction duct. An opening for supplying outside air to each of the air conditioners, and means for forming a space between an installation surface of the engine generator and the bottom plate. 2. A partition wall provided in the bottom plate for introducing outside air to the engine side, for dividing the introduced outside air into the engine cylinder side and the air cleaner side. The outside air introduction structure of the engine generator according to the above. 3. The outside air introduction duct comprises a box body having the outside air introduction port on the lower surface, the entire upper surface being open and the peripheral side surface being covered, and the box body being opened on the engine side and the generator side. The outside air introduction structure for an engine generator according to claim 1, wherein the external air introduction structure is mounted on a lower surface of the bottom plate so as to cover the bottom plate.