JP2003120310A - Engine generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily provide excellent sound insulating performance as needs arise without deteriorating cooling performance while making the most of good points of a frame type engine generator which has less number of components, easily divides a low temperature side and a high temperature side to perform efficient cooling, and is small size, light weight and low cost by commonization of major components. SOLUTION: A front, a rear and an upper surface of a support frame 4 are blocked by an operation panel 25, a muffler cover 26, and a fuel tank 22. A left and a right surface of the support frame 4 can be blocked by a left and a right panel 27, 28, and a lower surface thereof can be blocked by a base plate 29. A dividing plate 8b dividing a low temperature generator 3 side and a high temperature engine 2 side is formed as one body with a fan cover 8 of a cooling fan 5 provided between the engine 2 and the generator 3. A seal rubber 34 sealing an opening between opposing parts can be provided on a circumference of left and right edge parts of the dividing plate 8b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine generator that has a cooling fan between an engine and a generator and sends cooling air from the generator side to the engine side for cooling.

[0002]

2. Description of the Related Art Conventionally, various engine generators have been proposed which have an engine and a generator and efficiently cool the engine and the generator with a cooling fan. In this engine generator, the generator side is generally on the low temperature side and the engine side is on the high temperature side.Therefore, in order to cool with the cooling fan, the cooling air passage is appropriately formed by the fan cover and, if necessary, the cooling air passage. Often, it is partitioned by a partition plate or the like so as to prevent backflow from the high temperature side to the low temperature side.

For example, in Japanese Unexamined Patent Publication No. 11-36879, a flange extending in the outer peripheral direction is provided on the opening surface of a fan cover, a rectangular frame member is separately attached to the flange, and a seal rubber is further attached to the rectangular frame member. An engine generator to be installed is disclosed.

[0004]

However, in the above-mentioned prior art, since the fan cover and the rectangular frame member are separate bodies, the number of parts is increased, and the fan cover and the rectangular frame member are accurately arranged with no gap. There is a problem that the man-hours are complicated due to the connection. At this time, if the fan cover and the rectangular frame member are not accurately connected, the flow of the cooling air does not flow smoothly from the low temperature side to the high temperature side, resulting in poor cooling efficiency.

The present invention has been made in view of the above circumstances.
The number of parts is small and the low temperature side and the high temperature side can be easily separated to perform efficient cooling. Also, by sharing the main parts, the advantages of a frame-type engine generator of small size, light weight and low cost can be utilized. An object of the present invention is to provide an engine generator that can easily obtain excellent soundproofing performance as needed without deteriorating the cooling performance.

[0006]

In order to achieve the above object, an engine generator according to claim 1 of the present invention is a forced air cooling type engine, a generator connected to and driven by the engine, and the engine. In the engine generator including a cooling fan arranged between the generator and the generator to blow cooling air from the generator side to the engine side, a fan cover for covering the cooling fan is provided with the engine side. It is characterized in that a partition plate for partitioning the generator side is integrally formed. Therefore, the number of parts can be reduced,
Further, there is no need to connect the fan cover and the partition plate, and it is possible to easily cool the low temperature side and the high temperature side with high efficiency.

The engine generator according to a second aspect of the present invention is the engine generator according to the first aspect, wherein the partition plate seals a gap between a portion facing the outer edge of the partition plate. The feature is that the member can be installed around,
With this seal member, it is possible to more reliably partition the low temperature side with the generator from the high temperature side with the engine.

An engine generator according to claim 3 of the present invention is the engine generator according to claim 1 or 2, further comprising a support frame for supporting the engine and the generator therein. A fuel tank arranged to close the upper surface of the support frame, an operation panel closing the front surface of the support frame on the generator side, and a muffler cover closing the rear surface of the support frame on the engine side. The left side surface of the support frame can be closed by a left panel, the right side surface of the support frame can be closed by a right panel, and the lower surface of the support frame can be closed by a base plate. That is, in this engine generator, if the left and right panels and the base plate are used to block the left and right surfaces and the lower surface of the support frame, the main parts can be made common and the advantages of the frame-type engine generator of small size, light weight and low cost can be utilized. Therefore, the low temperature side and the high temperature side can be surely partitioned and the excellent soundproofing performance can be easily obtained as needed without deteriorating the cooling performance.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 to 6 relate to an embodiment of the present invention, FIG. 1 is a left side view of an engine generator, FIG. 2 is an explanatory view of a connection between an engine and a generator, and FIG. 3 is a generator side of a fan cover. FIG. 4 is a perspective view of the fan cover from the engine side, FIG. 5 is an explanatory view of attaching each soundproof panel to the engine generator, and FIG. 6 is an explanatory view of the fan cover attachment viewed from the generator side. is there.

In FIG. 1, reference numeral 1 indicates a frame-type engine generator, in which a single-cylinder forced-air cooling type engine 2 and a generator 3 are supported inside by a support frame 4.

The engine 2 has a cylinder head (not shown) tilted to the right and is arranged so that its height within the support frame 4 is low.

Further, as shown in FIG. 2, a flywheel integrally having a cooling fan 5 for blowing air from the generator 3 side to the engine 2 side at the shaft end of a crankshaft 2a extending forward from the engine 2. 6, a recoil shaft 7a that constitutes a recoil starter 7 that is operated by pulling the recoil grip 7b is fixed to the flywheel 6.

The outside of the cooling fan 5 is covered with a fan cover 8. The fan cover 8 is formed so as to cover the cooling fan 5 and the flywheel 6. The rear end of the fan cover 8 is open, and the rear end is fixed to the engine 2 and a flange 9 formed on the engine cover (not shown) that covers the engine 2.

Further, from the rear end of the fan cover 8 to the front, as shown in FIGS. 3 and 4, four claw portions 8a are extended (in FIG. 2, the claw portions 8a of the claw portions 8a are extended). Some are omitted). Further, the rear end of the generator duct 10 is attached to the outer periphery of the claw portion 8a, and the generator duct 1
The rear end surface of 0 is fixed to the front surface of the fan cover 8.

Further, the generator 3 is attached to the end of the recoil shaft 7a.
The outer rotor 11 having a drum shape is fixedly installed. The generator 3 is an outer rotor type multi-pole generator, and a plurality of permanent magnets 12 are arranged at equal intervals on the inner circumference of the outer rotor 11, and a stator 13 is provided opposite to the inner circumference of the permanent magnet 12. .

The stator 13 is formed of a stator core and a stator coil (not shown) wound around the stator core. The stator 13 is provided on the inner peripheral surface of the generator end cover 14 so as to project therefrom. The boss 14
It is hooked on a and is fixed via a bolt (not shown).

The opening end of the generator end cover 14 that opens rearward extends from the fan cover 8 with a claw portion 8a.
The cooling air passage 15 is formed between the outer circumference of the generator end cover 14 and the inner circumference of the generator duct 10.

On the other hand, as shown in FIG. 5, the support frame 4 is provided in front of and behind the pipe frame 20 formed in a substantially rectangular shape.
The boat-shaped frame is bent and projected upward, and left and right channels 21L and 21R are provided in the front-rear direction above the left and right side surfaces formed by the pipe frame 20, respectively. Then, the left and right channels 21L, 21
A fuel tank 22 is fixedly mounted on R by closing the upper surface of the support frame 4.

Further, front and rear base channels 23f and 23r are provided in the left and right directions on the front and rear of the lower surface of the support frame 4, respectively.
The power generator 3 is mainly supported on the front base channel 23f, and the engine 2 is mainly supported on the rear base channel 23r.

On the front side of the support frame 4, there is provided an electrical equipment box 24 for taking out the output from the engine generator 1 and storing various control parts. An operation panel for covering the front side of the electrical equipment box 24 is provided. At 25, the front surface of the support frame 4 is closed.

The electrical equipment box 24 has a central lower right portion, that is, a portion located on the front side of the generator 3 is formed so as to penetrate therethrough in the front-rear direction, and the operation panel 25 located at this portion is partitioned. The louver 25a is formed so that outside air can be sucked toward the generator 3.

On the rear side of the support frame 4, the engine 2
Muffler (not shown) is provided, and the rear surface of the support frame 4 is closed by a muffler cover 26.
This muffler cover 26 is provided with a muffler hole for exposing the muffler outlet pipe to the rear, and
A louver (both not shown) for exhausting the air inside is formed.

As shown in FIG. 5, the frame-type engine generator 1 constructed as described above has the right and left side surfaces of the support frame 4 closed by the left and right panels 27 and 28, respectively, and the lower surface thereof is the base plate 29. By closing with, all six surfaces can be closed freely, and by closing all six surfaces, excellent soundproof performance can be obtained. It should be noted that in FIG. 5, detailed illustration of the internal configuration of the engine generator 1 is omitted in order to explain the attachment of each panel.

That is, the left and right panels 27, 28 are first hooked at their lower ends to the pipe frame 20 of the support frame 4 by using hook portions 35, 45 described later. Then, above the left and right panels 27, 28, the screws 30 are inserted into the holes 27a, 28a of the respective panels, and the left and right channels 21
The left and right side surfaces of the support frame 4 can be easily closed by screwing into the screw holes 21La and 21Ra of the L and 21R.

In the base plate 29, bolts 31 are inserted into holes 29a formed at four positions in the front, rear, left and right, and screwed in screw holes in the front and rear base channels 23f, 23r, or bolts are fixed by previously welded nuts or the like. By doing so, the lower surface of the support frame 4 can be closed.

At this time, in the present embodiment, the base plate 29 is provided below the base plate 29 via caster plates 33 having casters 32 at the four corners. The caster plate 33 has a hole 33a provided at the same position as the hole 29a of the base plate 29 and is fastened together with a bolt 31.

The fan cover 8 of the cooling fan 5 is
For example, a partition plate 8b that is formed by aluminum molding and that divides the low temperature generator 3 side and the high temperature engine 2 side is integrally formed at the rear end of the fan cover 8.

A plurality of holes 8c are formed along the left and right upper edges of the partition plate 8b of the fan cover 8, respectively, and the outer periphery of the partition plate 8b is provided with a gap with a facing portion. Rubber 34 as a seal member for closing the
Is a protrusion (not shown) provided on the seal rubber 34.
By being fitted into the hole 8c, it can be freely installed around.

That is, as shown in FIG. 6, with respect to the frame type engine generator 1, the left and right panels 27 and 28 are
When the base plate 29 is attached to improve the soundproof performance, the seal rubber 34 is provided around the edge of the partition plate 8b so that the fuel tank 22 and the partition plate 8b are separated from each other between the left panel 27 and the partition plate 8b. Between the right panel 28 and the partition 8
and the low temperature power generator 3 by blocking as much as possible between b and
The side and the high temperature engine 2 side are configured to be partitioned. Then, by the cooling fan 5, the cooling air passes through the cooling air passage 15 between the outer circumference of the generator end cover 14 and the inner circumference of the generator duct 10, passes through the center of the fan cover 8, and is cooled to a high temperature. It is sent to the engine 2 side and the generator 3
Side to the engine 2 side can be efficiently cooled.

As described above, according to the present embodiment, since the fan cover 8 and the partition plate 8b are integrally formed, the number of parts can be reduced and the fan cover 8 and the partition plate 8b can be connected. It is also possible to reduce the complicated man-hours required for the operation, and to easily partition the low temperature side and the high temperature side.

Further, in the engine generator 1 according to the present embodiment, while utilizing the advantages of the frame-type engine generator in which the main parts are made common and the size and weight are low,
If only the left and right panels 27, 28 and the base plate 29 are attached, excellent soundproofing performance can be easily obtained if necessary.

Further, when the left and right panels 27, 28 and the base plate 29 are attached for use with improved soundproofing performance, a seal rubber 34 is provided around the partition plate 8b to connect the left and right panels 27, 28 and the fuel tank 22 to each other. By closing the gap between the partition plate 8b and the partition plate 8b, the low temperature generator 3 side and the high temperature engine 2 side can be partitioned easily and reliably, and efficient cooling by the cooling fan 5 is possible. .

[0033]

As described above, according to the present invention,
The number of parts is small and the low temperature side and the high temperature side can be easily separated to perform efficient cooling. Also, by sharing the main parts, the advantages of a frame-type engine generator of small size, light weight and low cost can be utilized. In addition, excellent soundproofing performance can be easily obtained as needed without deteriorating the cooling performance.

[Brief description of drawings]

FIG. 1 Left side view of engine generator

FIG. 2 is an explanatory view of the connection between the engine and the generator.

FIG. 3 is a perspective view of the fan cover from the generator side.

FIG. 4 is a perspective view of the fan cover from the engine side.

FIG. 5 is an explanatory diagram for attaching each soundproof panel to the engine generator.

FIG. 6 is an explanatory view of mounting the fan cover viewed from the generator side.

[Explanation of symbols]

1 engine generator 2 engine 3 generator 4 Support frame 5 cooling fan 8 fan cover 8b Partition plate 22 Fuel tank 25 Operation panel 26 muffler cover 27 Left panel 28 Right panel 29 Base plate 34 Seal rubber (seal member)

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yutaka Otsuka             1-7-2 Nishi-Shinjuku, Shinjuku-ku, Tokyo Fuji             Heavy Industry Co., Ltd.

Claims (3)

[Claims] 1. A forced air cooling type engine, a generator that is connected to and driven by the engine, and is arranged between the engine and the generator to supply cooling air from the generator side to the engine side. An engine generator comprising a cooling fan for blowing air, wherein a partition plate for partitioning the engine side and the generator side is integrally formed on a fan cover for covering the cooling fan. 2. The engine generator according to claim 1, wherein the partition plate is provided with a seal member that can freely surround a gap between the partition plate and a portion facing the outer edge of the partition plate. 3. A fuel tank provided with a support frame for internally supporting the engine and the generator, the fuel tank having an upper surface of the support frame closed and a front surface of the support frame on the generator side closed. And a muffler cover that closes the engine-side rear surface of the support frame, a left panel that can close the left side surface of the support frame, and a right panel that can close the right side surface of the support frame. The engine generator according to claim 1 or 2, further comprising: a base plate capable of closing the lower surface of the support frame.