JP2003293771A - Engine power generator - Google Patents

Abstract

(57) [Problem] To provide an engine generator capable of effectively cooling a controller, which is an electrical component, and suppressing noise leakage from an intake port. SOLUTION: In a sound insulation cover 11, a power generator 14, an engine 13 for driving the power generator 14, a controller 15 for controlling these, and a fuel tank 12 for supplying fuel to the engine 13 are accommodated. A first intake port 21b and an exhaust opening 23b are formed in the cover 11 so that the engine 13
When the engine cooling fan 35 driven by the engine is driven, outside air is introduced from the first intake port 21b to cool the controller 15 and the like and to discharge warm air from the exhaust opening 23b. The controller 15 is arranged near the back side of the first intake port 21b so as to cover the first intake port 21b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine generator in which a power generator, an engine, a fuel tank, etc. are housed in a sound insulation cover.

[0002]

2. Description of the Related Art Conventionally, in an engine generator that drives a power generator by an engine to generate power, in order to insulate noise during power generation, the power generator, the engine, and various parts such as a muffler, a fuel tank, and a controller. Are housed in a sound insulation cover so that each component is arranged as compactly as possible.

Since the engine and the power generator generate heat, if they are covered with a sound insulating cover, the inside of the sound insulating cover becomes high temperature. Therefore, outside air is introduced into the sound insulating cover to enter the sound insulating cover. The various components housed in it are cooled.

[0004]

However, in such a conventional device, it is necessary to effectively cool the controller, which is an electrical component, and at the same time, the intake cover is used to introduce outside air. When the mouth is provided, there is a problem that noise due to the engine or the like leaks to the outside from the air intake.

As an engine generator of this type,
For example, JP-A-2001-27125 to JP-A-2001-2
7128, JP-A-11-200861, JP-A-11-200873 to JP-A-11-200877, and the like.

Therefore, it is an object of the present invention to provide an engine generator capable of effectively cooling a controller, which is an electric component, and suppressing leakage of noise from the intake port.

[0007]

In order to achieve the above object, the present invention according to claim 1 provides a power generator in a sound insulating cover, an engine for driving the power generator, and a controller for controlling these. And a fuel tank for supplying fuel to the engine, an intake port and an exhaust port are formed in the sound insulation cover, and a cooling fan driven by the engine is driven to drive the intake port. In an engine generator in which outside air is introduced to cool the controller and the like to discharge warm air from the exhaust opening, the controller is arranged near the back side of the intake opening so as to cover the intake opening. It is characterized by being an engine generator.

According to a second aspect of the present invention, in addition to the configuration of the first aspect, the intake port is provided on the operation surface side of the sound insulating cover.

The invention according to claim 3 is the invention according to claim 1 or 2.
In addition to the configuration described in (1), the controller has a flat rectangular parallelepiped shape, and is arranged such that a wide surface on a large area side faces the operation surface portion side.

The invention according to a fourth aspect is the first to the third aspects.
In addition to the configuration according to any one of, the fuel tank, the engine, from one side in the left-right direction on the operation surface side.
The power generators are arranged in this order, the intake ports are provided with first and second intake ports, and the cooling fan is provided with an engine cooling fan and a power generator cooling fan.
The first intake port is formed on the one side, the engine cooling fan is disposed between the fuel tank and the engine, and the engine cooling fan is driven to move from the first intake port. Outside air is taken in, and the controller, engine cooling fan, engine cylinder,
The first cooling air passage that cools in the order of the muffler and exhausts from the exhaust opening is formed, and the second intake port is formed closer to the central portion in the left-right direction than the first intake port. A cooling fan is arranged in the vicinity of the power generator, and by driving the power generator cooling fan, outside air is taken in through the second intake port, and the engine crankcase and the power generator are cooled in this order. A second cooling air passage is exhausted from the exhaust opening.

According to a fifth aspect of the present invention, in addition to the structure according to the fourth aspect, the second cooling air passage is arranged below the first cooling air passage on the exhaust opening side, and the second cooling air passage is provided. An air flow direction control unit that directs the air exhausted from the second cooling air passage downward is formed between the first cooling air passage and the second cooling air passage.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below.

1 to 62 are views showing an embodiment of the present invention.

First, the structure will be described. The engine generator of the present invention is roughly divided into a plurality of divided sound insulation covers 11 from one side in the left-right direction (the left side in FIG. 5), the fuel tank 12, the engine 13, and the like. Power generators 14 are sequentially arranged, a controller 15 is arranged adjacent to the front side of the fuel tank 12, and a control box 16 is arranged above the controller 15 while being supported by the sound insulation cover 11. Has been done.

The sound insulation cover 11 is composed of a tray-shaped under cover 19, and a front cover 21, a rear cover 22 and a side cover 23, which are split covers 20 arranged above the under cover 19.

The undercover 19 is shown in FIGS.
As shown in FIG. 1, a boss portion 19a on which the fuel tank 12 is mounted, a mount portion 19b on which the engine 13 and the power generator 14 are supported, and a rib portion 19c on which the controller 15 is supported are formed on the bottom surface portion 19h. At the same time, a reinforcing rib portion 19k and a groove portion 19d are formed. In addition, a boss portion 19j that supports a fuel cock 47 described later is formed on the bottom surface portion 19h. further,
The peripheral vertical wall 1 provided on the peripheral portion of the under cover 19
A plurality of mounting pieces 19f are formed on 9e, and a fitting edge portion 19g fitted to the split cover 20 is bent outward.

Further, as shown in FIGS. 12 to 17, the front cover 21 has a longitudinal front portion (operation surface portion 21).
A side surface portion 21k is formed so as to wrap around from j) to the left side surface side which continues at a substantially right angle.

The front cover 21 includes an operation surface portion 2
A mounting opening 21a for mounting the control box 16 is formed in the upper left of 1j, and three first intake ports 21b for taking in outside air are formed under the mounting opening 21a (Fig. 15 (a) etc.).

A slit 21 for mounting the control box 16 is provided on the peripheral portion of the mounting opening 21a.
A plurality of g are formed, and a boss portion 21q for screwing the control box 16 is formed.

Further, the front cover 21 is provided with a second cover at a position closer to the center in the left-right direction than the first intake port 21b.
An intake port 21m is formed (see FIG. 15 (b)).
In the vicinity of the second intake port 21m, a wire 27 extended from a recoil starter portion 34, which will be described later, provided inside is drawn out.

Furthermore, a one-sided handle portion 21c is formed on the upper portion of the front cover 21, and the half side of the fuel supply cylinder portion 12a of the fuel tank 12 is on the left side in FIG. 13 of the one-sided handle portion 21c. A substantially semicircular one-side holding opening 21h to be pressed is formed. In addition, as shown in FIG. 13, on the upper surface of the front cover 21,
A lid opening 21p is formed, and the opening / closing lid 29 shown in FIGS. 18 and 19 is detachably attached to the lid opening 21p.

The screwing boss portion 21d provided on the lower edge portion of the front cover 21 is configured to be attached to the attachment piece 19f of the under cover 19 by the screws 24 at a plurality of places. A fitting groove 21e is formed at the lower edge of the front cover 21 so that the inner surface side is opened and the fitting edge 19g of the under cover 19 is fitted to the upper side of the fitting groove 21e. A plurality of tongue pieces 21f that are in contact with the upper edge of the peripheral vertical wall 19e of the under cover 19 are provided on the inner side of the under cover 19 so as to project inward.

Further, as shown in FIGS. 20 to 22, the rear cover 22 has a substantially symmetrical shape with respect to the front cover 21, and has a side surface extending from the rear surface portion 22j in the longitudinal direction to the left side surface which is continuous at a substantially right angle. The portion 22k is formed. Then, on the back surface 22j of the rear cover 22,
As shown in FIG. 2, a lid 25 is detachably attached to the central portion in the left-right direction.
As shown in 3, a second intake port 25a for taking in outside air is formed. Further, the rear cover 22 is also formed with a one-side handle portion 22c and a one-side holding opening portion 22h,
By being attached to the front cover 21 with the screw 24, the handle portion 26 is formed by the handle portions 21c, 22c on both sides of the rear cover 22 and the front cover 21, and the holding opening portions 21h, 22h on both sides form the fuel tank 12. The entire circumference of the oil supply cylinder portion 12a is held. Then, a screwing boss portion 22d, a fitting groove 22e, and a tongue piece 22f are formed on the lower edge portion of the rear cover 22 as well as the front cover 21. The mounting piece 19f of the under cover 19 can be mounted.

Furthermore, the side cover 23 is shown in FIG.
As shown in FIG. 26 to FIG. 28, it is arranged on the right side when viewed from the front side, above the under cover 19 and between the front cover 21 and the rear cover 22. As shown in FIG. 26, the side cover 23 is provided with a muffler opening 23a facing the exhaust port 30a of the muffler 30 of the engine 13, and an exhaust opening 23b through which warmed air that has cooled the inside is exhausted to the outside. It is formed in a rectangular range. A plurality of screw fastening boss portions 23d are formed on the side cover 23, and the under cover 1
9, screws 24 on the front cover 21 and the rear cover 22
It is designed to be attached by.

Further, the front cover 21 and the rear cover 22 are configured such that the side edge portions are groove-fitted and connected.

Further, the control box 16 is detachably attached to the attachment opening 21a of the front cover 21. As shown in FIGS. 29 to 37, the control box 16 has a housing 16a to which a plate 16b is detachably attached from the front side by screws 16g, and a plurality of switch portions 16c, outlets 16d, and a plurality of outlets 16d are attached to the plate 16b. The pilot lamp 16e and the like are attached, and various electric components are arranged in the housing 16a, and the electronic component has a certain thickness (depth). Further, an operation knob 16f for operating a fuel cock 47 described later is rotatably attached to the control box 16.

As shown in FIGS. 32 and 36, the housing 16a of the control box 16 is provided with a plurality of locking claws 16h, and the locking claws 16h are slits 21g (formed in the front cover 21). (See FIG. 12)) and is locked. Further, as shown in FIG. 37, the lower edge portion 16k of the housing 16a is adapted to be locked to the outside of the lower peripheral edge portion of the mounting opening 21a of the front cover 21, and the guide ribs 16m are provided at several places. Are formed. The housing 16a is configured such that the boss portion 16p shown in FIGS. 31 and 35 is attached to the boss portion 21q of the front cover 21 shown in FIG. 12 with screws from the inside. This allows the locking claw 1 to be removed by removing the screws at several places.
The control box 16 can be easily removed only by pulling out 6h. In addition, the switch unit 16
c, the pilot lamp 16e, etc. are on the plate 1 from the front side.
It can be repaired simply by removing 6b.

The sound insulation cover 11 is constructed as described above.

Next, the internal parts housed in the sound insulation cover 11 will be described.

First, looking at the generator from the front,
The intake port 2 of the front cover 21 is provided on one side (left side).
A controller 15 is arranged below the control box 16 having a predetermined thickness in the vicinity of the back side of the 1b.

The controller 15 is detachably connected to the control box 16, the engine 13, the power generator 14 and the like by a harness, a connector and the like, and is configured to control the engine 13 and the power generator 14. ing.

The controller 15 has a flat rectangular parallelepiped shape, is placed vertically, and is arranged with its longitudinal direction aligned with the left-right direction of the engine generator. As a result, the wide surface on the large area side is the operation surface portion 21 of the front cover 21.
By being arranged so as to face the j side, the intake port 21b
Is covered. The controller 15 is fixed while being supported by the rib portion 19c of the under cover 19.

The fuel tank 12 and the engine 1 are directed from one side (left side) of the generator in the left-right direction toward the right side.
3 and the power generator 14 are arranged in this order.

As shown in FIGS. 4 and 7, the fuel tank 12 is arranged side by side on the rear side of the controller 15, and as shown in FIG. 6, a rubber rubber 31 is attached to a pair of boss portions 19a of the under cover 19. Is supported through.
Further, the fuel tank 12 is provided with the fuel filler cylinder portion 1 as described above.
2a is held by the front cover 21 and the rear cover 22 via the rubber insulator 12b so as to be fixedly housed in the sound insulating cover 11.

Undercover 19 of the fuel tank 12
As shown in FIGS. 6 and 8, the mounting structure on the undercover 19 has two bosses 19a protruding upward from the undercover 19.
And a fitting shaft portion 12c projecting downwardly is also provided on the bottom surface portion of the fuel tank 12, and these are fitted to the rubber rubber 31, so that the fuel tank 12 is covered with the under cover 19 via the rubber rubber 31. It is placed in.

On the other hand, the engine 13 is a four-cycle single-cylinder engine here, and a crankcase 13a is arranged on the lower side and a cylinder 13b is provided on the upper side of the crankcase 13a.
A muffler 30 is arranged on the middle right side, and a carburetor 13d is arranged behind the cylinder 13b.

Between the crankcase 13a of the engine 13 and the fuel tank 12, the crankshaft 1
An engine starting recoil starter portion 34 connected to the engine 3c is arranged, and a plurality of openings 34a are formed in the recoil starter portion 34.
The engine 13 is started by pulling the wire 27 and rotating the wire 4.

An engine cooling fan 35 connected to the crankshaft 13c is disposed between the recoil starter portion 34 and the crankcase 13a, and the engine cooling fan 35 is rotated by driving the engine 13. As a result, the cooling air is taken in through the first intake port 21b to cool the controller 15, the engine 13, and the like.

On the other hand, on the right side of the engine 13 in FIG. 5, below the muffler 30, an outer rotor type power generator 14 is provided. The power generator 14 includes a stator 14a fixed to a crankcase 13a, and a stator 14a. The rotor 14b is fixed to the crankshaft 13c, and the rotor 14b is rotated by rotating the crankshaft 13c.
It is configured to generate electricity.

A power-generator cooling fan 36 for cooling the power-generator 14 is arranged on the right side of the power-generator 14 in FIG. 5, and is driven by the rotation of the crankshaft 13c. While inhaling the outside air from the intake port 25a,
The stagnant air in the sound insulation cover 11 is sucked in to cool the power generator 14, and the warm air is discharged from the exhaust opening 23b of the side cover 23.

When the engine cooling fan 35 is driven, the outside air is sucked in through the first intake port 21b, and the controller 15 and the engine 15 as shown by the one-dot chain line arrows in FIGS. 5, 6 and 7. Cool the fan 35 for cooling, the engine cylinder 13b, and the muffler 30 in this order,
A first cooling air passage is configured to be exhausted from approximately the upper half of the exhaust opening 23b.

When the power generator cooling fan 36 is driven, outside air is sucked in through the second intake port 25a,
As shown by the dashed arrows in FIGS. 5, 6 and 7, the engine crankcase 13a and the power generator 14 are cooled in this order,
A second cooling air passage is configured to be exhausted from the lower half of the exhaust opening 23b.

The first cooling air passage is constructed as follows. That is, the air filter case 38 is provided so as to cover the fuel tank 12 side of the engine 13, and the front air shroud 39 and the engine cylinder 13b which are continuous with the air filter case 38 and cover the front side of the engine cylinder 13b and the muffler 30 are provided. A rear air shroud 40 that covers the rear side of the muffler 30 is provided.

As shown in FIGS. 43 to 45, the air filter case 38 is formed with a circular opening 38a through which the recoil starter portion 34 is exposed, covers the engine cooling fan 35, and covers the recoil starter portion 34. It is attached to the engine 13 so as to guide the cooling air passing through the opening 34a to the upper cylinder 13b side.

Further, the air filter case 38 has
The sound insulation rib 3 surrounds the recoil starter portion 34.
8b is provided so as to project toward the fuel tank 12 side, the sound absorbing material 38c is arranged inside the sound insulation rib 38b, and the facing portion of the fuel tank 12 facing the recoil starter portion 34 is also illustrated. The sound absorbing material is attached to the opening 3 of the recoil starter portion 34.
4a is covered.

Further, an air cleaner mounting portion 38d is formed on a side portion of the air filter case 38, and an air cleaner 41 for cleaning air is attached to the air cleaner mounting portion 38d.

Further, the front air shroud 39 and the rear air shroud 40 are made into a substantially half-split state in the front-rear direction, and are assembled to cover the engine cylinder 13b and the muffler 30 at the side and above with a gap through which cooling air passes. Is configured.

The front air shroud 39 is shown in FIG.
6 to 49, the plurality of mounting portions 39a are screwed to the engine 13, and fibers (not shown) having heat insulating properties and sound insulating properties are provided inside. ing. The front air shroud 39 covers the lower side of the muffler 30,
A partition wall 39b that separates the second cooling air passage that passes through the power generator 14 side is formed, and an exhaust opening 39d is formed on the side cover 23 side.

The rear air shroud 40 is formed in a shape as shown in FIGS. 50 to 53 and has a plurality of mounting portions 40a.
Is screwed to the engine 13, and a fiber (not shown) having heat insulating properties and sound insulating properties is provided inside. Further, the rear air shroud 40 is formed with a partition wall portion 40b that covers the lower side of the muffler 30 and separates from the second cooling air passage passing through the power generator 14 side, and the side cover 23 side for exhaust. Opening 40d
Are formed.

When the rear air shroud 40 and the front air shroud 39 are connected, the partition wall 40b of the rear air shroud 40 and the front air shroud 3 are connected.
9 is connected to the partition wall portion 39b, and both exhaust openings 39d and 40d are connected to form an exhaust port of the second cooling air passage.

Further, in the partition wall portion 40b of the rear air shroud 40, between the first cooling air passage and the second cooling air passage, a wind direction control portion for directing the air exhausted from the second cooling air passage downward. 40c is formed. This wind direction control unit 40c
Is curved downward as shown in FIG. 51 and the like.

On the other hand, a part of the second cooling air passage is formed by a power generator side front cover 43 and a power generator side rear end cover 44 which cover the power generator 14 and the power generator cooling fan 36 as shown in FIGS. 54 to 55. Is configured.

This power generator side front cover 43 is shown in FIG.
As shown in FIGS. 5 to 58, a tubular portion 43a that covers the periphery of the power generator 14 and the power generator cooling fan 36 is formed, and at the one end side of the tubular portion 43a, the front surface of the power generator 14 ( A suction opening 43b for exposing cooling air is formed by exposing the side surface of the engine. This suction opening 43b
A shield portion 43c, which is bent inward from the tubular portion 43a, is formed in an annular shape at the peripheral edge portion of the. The engine 13 side is covered. As shown in FIG. 54 and the like, the shielding portion 43c is formed so that the width H on the upper side is wider than the other portions.

Further, the power generator side rear end cover 44 is formed with a closing portion 44a for closing the opening on the other side (side cover 23 side) of the front cover tubular portion 43a, and as shown in FIGS. 42, 59 and 60. As shown, an outlet 44b is formed on the upper rear air shroud 40 side.

Then, below the outlet 44b,
A shielding rib 44c projecting to the side cover 23 side is continuously formed in a substantially U-shape, and a tip end portion of the shielding rib 44c abuts on a back surface side of the side cover 23, so that the exhaust opening 2
It is adapted to come into contact with the lower peripheral edge of 3b. The cooling air blown out from the blowout port 44b receives the shielding rib 44.
It is configured to be guided to the space defined by c and to be discharged to the outside of the generator from the lower side portion of the rectangular exhaust opening 23b of the side cover 23.

The wind direction control section 40c of the rear air shroud 40 is located above the outlet 44b.

As a result, when the power generator cooling fan 36 is driven, the sound insulation cover 11 is mainly driven from the second intake port 25a.
Outside air is introduced into the engine crankcase 13a,
Power generator 14, fan for cooling power generator 36, outlet 44
b, a second cooling air passage passing through the exhaust opening 23b is formed.

On the other hand, as shown in FIGS. 4 and 6, on the side surface of the fuel tank 12 opposite to the control box 16 side, the fuel in the fuel tank 12 is placed on the upper side of the engine 1.
A fuel pump 46 for supplying to the third side is attached, and a fuel cock 47 for shutting off the fuel supply is attached and arranged below the fuel pump 46 to a base plate 48 attached to the under cover 19. There is. The fuel cock 47 is connected to the operation knob 16f through a connecting member 49, and the fuel cock 47 is opened and closed by rotating the operation knob 16f.

Next, the operation will be described.

The wire 27 is pulled to pull the recoil starter 3
When the engine 13 is driven by rotating 4, the crankshaft 13c rotates and the rotor 1 of the power generator 14 rotates.
4b rotates and electric power is generated.

At the same time, the engine cooling fan 35
As the cooling air is rotated,
It flows through the first cooling air passage as indicated by the arrow indicated by the alternate long and short dash line.
That is, first, the outside air flows into the sound insulation cover 11 from the first intake port 21b, and the controller 15 is arranged near the back side of the first intake port 21b.
It is directly cooled by the outside air flowing from the intake port 21b.
Therefore, the cooling performance of the controller 15 is improved. Moreover, the controller 15 has a flat rectangular parallelepiped shape, and the wide surface on the large area side is the operation surface portion 21.
Since it is arranged so as to face the j side (first intake port 21b side), it is possible to further improve the cooling performance.

This cooling air passes through the upper side of the controller 15 or the lower side of the controller 15 and the fuel tank 12 while cooling the controller 15, and the engine cooling fan 3 from the opening 34a of the recoil starter 34.
It is sucked to the 5 side.

On the downstream side of the engine cooling fan 35, there is formed a first air filter case 38, a front air shroud 39 and a rear air shroud 40.
The cooling air passes through the cooling air passage, cools the engine cylinder 13b and the muffler 30, and is exhausted to the outside of the generator from approximately the upper half of the exhaust opening 23b of the side cover 23.

On the other hand, when the crankshaft 13c is rotated and the power generator cooling fan 36 is driven, the cooling air flows through the second cooling airflow path as shown by the broken line arrows in FIGS. 5, 6 and 7. Flowing. That is, first, the second intake ports 21m, 2
Outside air is sucked into the sound insulation cover 11 from 5a,
The stagnant air in the sound insulation cover 11 flows toward the power generator cooling fan 36 side.

As a result, the cooling air passes laterally of the engine crankcase 13a and is sucked into the space formed by the power generator side front cover 43 and the power generator side rear end cover 44 to cool the power generator 14. Then, the cooling air is discharged from the outlet 44b of the power-generator-side rear end cover 44, and is discharged from the space formed by the shielding ribs 44c to the outside of the generator through the lower portion of the exhaust opening 23b of the side cover 23.

In such a case, the first intake port 2
The fuel tank 12 and the controller 15, the engine 13, the power generator 14, and the exhaust opening 23b are provided in this order from the 1b side, and the low temperature fuel tank 12 and the controller 15 are provided on the upstream side.
By arranging, the flow path can be formed so that the air flow may flow from the low temperature fuel tank 12 and the controller 15 side to the high temperature engine 13 side. It is not necessary to provide a partition or the like between the sound insulation cover 11 and the power generator 14, and the structure inside the sound insulation cover 11 can be simplified.

The flow is the same as that of the first and second cooling air passages.
The first cooling air passage is formed in the system passage, and the first cooling air passage includes the first intake port 21b,
The flow of the controller 15, the engine cooling fan 35, the engine cylinder 13b, the muffler 30, and the exhaust opening 23b is configured, and the second cooling air passage includes the second intake ports 21m and 25m.
a, the engine crankcase 13a, the power generator 14, the power generator cooling fan 36, and the exhaust opening 23b.

As described above, by forming the two system paths as separate systems for the engine cylinder 13b and the muffler 30 side, which are relatively hot, and the power generator 14 side, they can be effectively cooled respectively.

Further, by forming the shielding portion 43c on the power-generating-body-side front cover 43, as shown in FIG.
The air is prevented from escaping from the gap C, the cooling air is easily taken in, and the bent shield portion 43 is formed.
Due to c, the strength of the power generator side front cover 43 itself is improved.

Further, since the wind direction control section 40c for directing the cooling air on the second cooling air passage side downward is formed between the first cooling air passage and the second cooling air passage, the second cooling air passage is formed. The cooling air exhausted from the passage does not affect the cooling air exhausted from the first cooling air passage, and the exhaust is performed smoothly. Therefore, the cooling air passing through the engine cylinder 13b and the like in the first cooling air passage is The flow can be improved, the cooling performance can be improved, the interference of the air exhausted from both cooling air passages can be prevented, and the noise can be reduced. Further, since the wind direction control section 40c covers the outlet 44b on the side of the power generator cooling fan 36, the fan 36 is provided.
It is possible to shield noise sources such as, and reduce noise.

Further, by disposing the controller 15 near the rear side of the first intake port 21b, sound leakage can be suppressed by this controller 15, and noise can be reduced at low cost without disposing additional parts. be able to. That is, the noise on the engine 13 side leaks from the opening 34a of the recoil starter portion 34, but the first intake port 21
Since the rear side of b is covered with the controller 15, it is possible to suppress sound leakage to the outside of the generator and reduce noise.

In particular, since the first intake port 21b is formed on the operation surface side of the front cover 21, preventing sound leakage from the first intake port 21b reduces noise to the operator. Above all, it is particularly effective.

Further, since the controller 15 has a flat rectangular parallelepiped shape and the wide surface on the large area side is arranged so as to face the operation surface portion side, the sound insulation can be further improved.

Furthermore, the fuel tank 12 and the controller 15 which are desired to maintain the low temperature state are arranged adjacent to each other in a state of being separated from the engine 13 and the power generator 14 side, which are high in temperature, so that the fuel tank 12 and the controller 15 are disposed. It is possible to suppress the influence of heat on the air as much as possible.

By directly mounting the fuel tank 12 and the controller 15 on the under cover 19, there is no need to support the fuel tank 12 with the sound insulation cover 11 or dispose a supporting member separately. 12 can be easily arranged with a small number of parts.

That is, by removing the screws 24, the side cover 23, the front cover 21, the rear cover 22.
In this order, the internal components such as the engine 13 and the fuel tank 12 can be maintained in their postures.

As a result, the assemblability can be improved, and the internal parts can be maintained with the covers 21, 22, 23 removed.
After finishing the maintenance, the covers 21 and 2 are
Since it is only necessary to reattach 2, 23, maintenance can be easily performed.

By the way, in the prior art disclosed in Japanese Patent Application Laid-Open No. 11-200861, etc., when the covers are removed, the posture of the internal parts cannot be maintained and the parts are disjointed. is there. In addition, JP-A-200
In the conventional device described in Japanese Patent Publication No. 1-27125, the covers of 6 parts have to be removed, and the workability is poor.

Moreover, since the front cover 21 and the like of the sound insulation cover 11 can be separated from the fuel tank 12 independently, maintenance and the like can be easily performed with the front cover 21 and the like removed.

Further, the fuel tank 12 is supported by the under cover 19 via the rubber rubber 31, and when the cover is attached, the refueling cylinder portion 12a of the fuel tank 12 is covered by the rubber insulator 1 by the front cover 21 and the rear cover 22.
The structure is such that it is sandwiched via 2b, and the cover 21,
Even when the fuel tank 22 is removed, the posture of the fuel tank 12 can be maintained as it is.

As a result, the bracket for fixing the tank unlike the conventional one described in Japanese Patent Laid-Open No. 2001-27125 is unnecessary, and the fuel system can be left as it is at the time of production assembly and market maintenance. And maintainability can be improved.

Further, since the control box 16 is arranged on the operation surface portion 21j of the front cover 21 and the controller 15 is arranged below the control box 16, the space under the control box 16 is effectively used to keep the controller 15 in place. Can be placed.

Further, since the fuel pump 46 is directly attached to the fuel tank 12 and the fuel cock 47 is screwed to the base plate 48, the fuel system can be separated from the front cover 21, the rear cover 22, etc., and the fuel system is unitized. It can be assembled and disassembled in a unitized state.

Furthermore, the control box 16
Are unitized in advance, and the front cover 21
Since it is fixed with screws from the inside, it can be easily replaced with another one, even if the specifications etc. differ from country to country. Further, since the mounting screw 16j is not visible from the outside, the appearance quality can be improved. Moreover,
The maintenance can be easily performed by removing the plate 16b by removing the screw 16g from the outside.

Since the lower edge portion 16k of the housing 16a of the control box 16 is provided with a guide rib 16m also serving as a reinforcement, the guide rib 16m is provided.
By guiding with, positioning and assembly can be easily performed.

Further, the front cover 21, the rear cover 22, and the side cover 23, which are arranged above the under cover 19, have fitting grooves 21e, 22e, and 23e whose inner surface is open at their lower edges. At the same time, a plurality of tongue pieces 21f, 22f, 23f are provided on the upper side of the fitting grooves 21e, 22e, 23e so as to project inward.

Therefore, when the front cover 21 or the like is attached, the tongue piece 21f or the like abuts the upper edge portion of the circumferential vertical wall 19e of the under cover 19 so that the tongue piece 21f does not slide down and is directed toward the inside as it is. It is possible to fit the fitting edge portion 19g of the under cover 19 into the fitting grooves 21e, 22e, 23e by sliding it and screwing it in this state. Workability can be improved.

Further, since the front cover 21 and the rear cover 22 have a substantially L shape so as to wrap around from the front surface or the back surface in the longitudinal direction to the side surface portion which is continuous at a substantially right angle, these cover 21, 22 are covered. Front, rear, left and right positioning can be performed.

Further, a sound insulation rib 38b is provided on the air filter case 38 so as to surround the recoil starter portion 34. Inside the sound insulation rib 38b, a sound insulation rib 38b is provided.
The sound absorbing material 38c is arranged, and the sound absorbing material (not shown) is also attached to the facing portion of the fuel tank 12 facing the recoil starter portion 34, so that the recoil starter portion having a high noise emission contribution rate. 34 openings 3
Sound can be insulated and absorbed in the vicinity of 4a, a new duct is not required, and noise can be effectively reduced.

[0090]

As described above, according to the invention as set forth in claim 1, since the controller is arranged in the vicinity of the back side of the intake port of the sound insulation cover so as to cover the intake port,
Since the outside air entering from the intake port directly hits the controller, the cooling efficiency of the controller can be improved, and this controller effectively suppresses the noise generated from the engine from leaking out from the intake port. be able to.

According to the invention described in claim 2, in addition to the above effects, since the intake port is provided on the operation surface side of the sound insulating cover, there is an operator on the operation surface side. It is very effective to prevent noise from leaking into the room.

According to the invention described in claim 3, in addition to the above effects, the controller has a flat rectangular parallelepiped shape, and the wide surface of the large area side is arranged so as to face the operation surface portion side. Therefore, it is possible to further improve the cooling property and the sound insulation property.

According to the invention described in claim 4, in addition to the above effects, the flow of the cooling air by the engine cooling fan,
By making the flow of the 2 system path with the flow of the cooling wind by the fan for cooling the power generator, more effective cooling is possible,
By arranging the fuel tank, controller, etc. that want to keep the temperature relatively low on the upstream side near the intake port, the structure is simple without disposing a shield plate etc. between the fuel tank, controller etc. and the engine, power generator etc. You can

According to the invention described in claim 5, in addition to the above effects, the second cooling air passage is provided between the first cooling air passage and the second cooling air passage.
Since the wind direction control unit that directs the cooling air on the cooling air passage side downward is formed, the cooling air exhausted from the second cooling air passage does not affect the cooling air exhausted from the first cooling air passage.
Since the exhaust is smoothly performed, the flow of the cooling air passing through the engine cylinders and the like in the first cooling air passage can be improved, the cooling performance can be improved, and the air exhausted from both cooling air passages can be Noise can be reduced without interference. Further, since the airflow direction control unit covers the outlet on the cooling fan side, the noise source such as the fan can be shielded and the noise can be reduced.

[Brief description of drawings]

FIG. 1 is a front view of an engine generator according to an embodiment of the present invention.

FIG. 2 is a rear view of the engine generator according to the same embodiment.

FIG. 3 is a right side view of the engine generator of the embodiment.

FIG. 4 is a view showing an arrangement state inside the engine generator of the embodiment.

FIG. 5 is a front view showing an internal structure of the engine generator of the embodiment, showing a flow of cooling air.

FIG. 6 is a rear view showing the internal structure of the engine generator of the embodiment, showing the flow of cooling air.

FIG. 7 is a plan view showing an internal structure of the engine generator of the embodiment, showing a flow of cooling air.

FIG. 8 is a plan view of an undercover of the engine generator according to the same embodiment.

FIG. 9 is a front view of an undercover of the engine generator of the embodiment.

FIG. 10 is a right side view of the undercover of the engine generator according to the same embodiment.

FIG. 11 is a cross-sectional view taken along line AA of FIG. 8 of the undercover of the engine generator of the same embodiment.

FIG. 12 is a front view of a front cover of the engine generator of the embodiment.

FIG. 13 is a plan view of a front cover of the engine generator according to the same embodiment.

FIG. 14 is a right side view of the front cover of the engine generator according to the embodiment.

FIG. 15 is a cross-sectional view of the front cover of the engine generator of the same embodiment, (a) is a B1-B1 line of FIG.
12B is a sectional view taken along the line B2-B2 of FIG.

FIG. 16 is a view of the front cover of the engine generator of the embodiment viewed from the arrow C in FIG.

17 is a cross-sectional view of the front cover of the engine generator of the embodiment, taken along the line DD of FIG.

FIG. 18 is a plan view of an opening / closing lid having a lid opening provided at the top of the front cover of the engine generator according to the embodiment.

FIG. 19 is an E-E cross-sectional view of FIG. 18 of the opening / closing lid of the front cover of the engine generator according to the same embodiment.

FIG. 20 is a rear view of the rear cover of the engine generator of the embodiment.

FIG. 21 is a plan view of a rear cover of the engine generator of the embodiment.

FIG. 22 is a right side view of the rear cover of the engine generator of the embodiment.

FIG. 23 is a rear view of the lid body of the one side holding opening portion of the rear cover of the engine generator of the embodiment.

FIG. 24 is a right side view of the lid body of the one side holding opening portion of the rear cover of the engine generator of the embodiment.

FIG. 25 is a cross-sectional view taken along line F-F of FIG. 23 showing the lid of the rear cover of the engine generator according to the same embodiment.

FIG. 26 is a front view of a side cover of the engine generator of the embodiment.

FIG. 27 is a left side view of a side cover of the engine generator of the embodiment.

28 is a cross-sectional view taken along line GG of FIG. 26 of the side cover of the engine generator of the embodiment.

FIG. 29 is a front view of a control box of the engine generator of the embodiment.

FIG. 30 is an exploded view of a control box of the engine generator of the embodiment.

FIG. 31 is a front view of the housing of the control box of the engine generator of the embodiment.

FIG. 32 is a plan view of the housing of the control box of the engine generator of the embodiment.

FIG. 33 is a right side view of the housing of the control box of the engine generator of the embodiment.

34 is a cross-sectional view taken along line HH of FIG. 31 of the housing of the control box of the engine generator of the embodiment.

35 is a cross-sectional view taken along the line I-I of FIG. 31 of the housing of the control box of the engine generator of the embodiment.

36 is a sectional view taken along the line JJ of FIG. 31 of the housing of the control box of the engine generator according to the embodiment.

FIG. 37 is a view showing a state where the control box of the engine generator of the embodiment is mounted on the front cover.
FIG.

FIG. 38 is a front view showing a state where the engine of the engine generator of the embodiment is equipped with an air shroud and two cooling fans and fixed to the under cover.

FIG. 39 is a front view showing a state in which an air shroud and two cooling fans are attached to the engine of the engine generator of the embodiment.

FIG. 40 is a rear view showing a state in which an air shroud and two cooling fans are attached to the engine of the engine generator of the embodiment.

41 is a left side view of FIG. 39 showing an engine cooling fan of the engine generator of the embodiment. FIG.

FIG. 42 is a right side view of FIG. 39 showing the power generator cooling fan of the engine generator of the embodiment.

FIG. 43 is a rear view of the air cleaner for the engine generator according to the embodiment.

FIG. 44 is a right side view of FIG. 43 of the air cleaner for the engine generator according to the embodiment.

FIG. 45 is a left side view of FIG. 43 of the engine generator air cleaner according to the embodiment.

FIG. 46 is a front view of a front air shroud of the engine generator of the embodiment.

FIG. 47 is a rear view of the front air shroud of the engine generator of the embodiment.

FIG. 48 is a left side view of the front air shroud of the engine generator of the embodiment.

FIG. 49 is a right side view of the front air shroud of the engine generator of the embodiment.

FIG. 50 is a front view of a rear air shroud of the engine generator of the embodiment.

FIG. 51 is a rear view of the rear air shroud of the engine generator of the embodiment.

FIG. 52 is a left side view of a rear air shroud of the engine generator of the embodiment.

FIG. 53 is a right side view of the rear air shroud of the engine generator of the embodiment.

FIG. 54 is a left side view showing the power generator in the state covered with the cover of the engine generator of the embodiment.

FIG. 55 is a cross-sectional view showing the power generator in a state covered by the cover of the engine generator of the embodiment, showing a flow of cooling air.

FIG. 56 is a front view of the power generator side front cover of the power generator cooling fan of the engine generator of the embodiment.

FIG. 57 is a rear view of the power generator side front cover of the power generator cooling fan of the engine generator of the embodiment.

FIG. 58 is a plan view of the power generator side front cover of the power generator cooling fan of the engine generator of the embodiment.

FIG. 59 is a rear view of the power generator side rear end cover of the power generator cooling fan of the engine generator of the embodiment.

FIG. 60 is a front view of the power generator side rear end cover of the power generator cooling fan of the engine generator of the embodiment.

FIG. 61 is a side view of the power generator side rear end cover of the power generator cooling fan of the engine generator of the embodiment.

[FIG. 62] LL of FIG. 59 of the power generator side rear end cover of the power generator cooling fan of the engine generator of the embodiment.
FIG.

[Explanation of symbols]

11 Sound insulation cover 12 Fuel tank 13 engine 13a crankcase 13b cylinder 13c crankshaft 14 Power generator 15 Controller 16 control box 19 Undercover 20 split covers 21 Front cover 21b First intake port 21m 2nd intake 21j Operation surface part 22 Rear cover 23 Side cover 23b Exhaust opening 25 Lid 25a Second intake port 30 muffler 35 Engine cooling fan 36 Fan for cooling power generator 38 Air filter case 39 Front air shroud 40 Rear air shroud 43 Power generator side front cover 44 Power generator side rear end cover 48 base plate

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) F01P 5/06 510 F01P 5/06 510A 510B 511 511H F02B 63/04 F02B 63/04 C D 77/13 77 / 13 N (72) Inventor Hidenori Takahashi 2500 Shinkai, Iwata, Shizuoka Prefecture Yamaha Motor Co., Ltd.

Claims (5)

[Claims] 1. A sound insulation cover, a power generator, an engine for driving the power generator, a controller for controlling the power generator, and a fuel tank for supplying fuel to the engine are housed in the sound insulation cover. An intake port and an exhaust port are formed, and a cooling fan driven by the engine is driven to introduce outside air from the intake port to cool the controller and the like to discharge warm air from the exhaust port. In the engine generator configured as described above, the controller is arranged near the back side of the intake port so as to cover the intake port. 2. The engine generator according to claim 1, wherein the intake port is provided on the operation surface side of the sound insulation cover. 3. The controller according to claim 1, wherein the controller has a flat rectangular parallelepiped shape, and a wide surface on a wide area side is arranged so as to face the operation surface portion side. Engine generator. 4. The fuel tank, the engine, and the power generator are arranged in this order from one side in the left-right direction of the operation surface side, and the intake port is provided with first and second intake ports, The cooling fan is provided with an engine cooling fan and a power generator cooling fan, the first intake port is formed on the one side, and the engine cooling fan is disposed between the fuel tank and the engine. When the engine cooling fan is driven, the outside air is sucked from the first intake port, the controller,
An engine cooling fan, an engine cylinder, and a muffler are cooled in this order to form a first cooling air passage that is exhausted from the exhaust opening, and the second intake port is in the left-right center part from the first intake port. The fan for cooling the power generator is arranged near the power generator, the fan for cooling the power generator is driven to suck the outside air from the second intake port, and the engine crankcase, 2. A second cooling air passage for cooling the power generators in this order and exhausting the air from the exhaust opening.
The engine generator according to any one of 1 to 3. 5. The second cooling air passage is disposed below the first cooling air passage on the exhaust opening side, and the second cooling air passage is provided between the first cooling air passage and the second cooling air passage. The engine generator according to claim 4, further comprising: a wind direction control unit that directs air discharged from the second cooling air passage downward.