JP3977046B2 - Engine generator - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine generator configured by supporting an engine and a generator with a support frame.
[0002]
[Prior art]
Conventionally, various types of frame-type engine generators are used in which a forced air-cooled engine and a generator connected to and driven by the engine are supported by a support frame such as a pipe frame. This frame-type engine generator has an excellent advantage that it can be configured at a low cost with a small number and a small number of parts because each surface of the frame is not covered with a panel.
[0003]
Also, such a frame type engine generator has a control panel and a muffler cover at the front and rear as shown in, for example, Japanese Patent Laid-Open No. 2000-213361. It is not configured.
[0004]
[Problems to be solved by the invention]
For this reason, the conventional frame-type engine generators including the above-mentioned prior art have the excellent advantages of small size, light weight and low cost as described above, but since all aspects are released, noise is generated. It has the disadvantage of being intense. For this reason, in order to use it in a place where noise is severely restricted, a soundproof type engine generator configured to cover all surfaces has been conventionally used. This soundproof type engine generator has a problem that many of the parts are different from those of the frame type engine generator in order to obtain a soundproof effect, and the above advantages of the frame type engine generator cannot be obtained. For this reason, the user must use a frame-type engine generator and a soundproof-type engine generator according to the work environment and cost, and the manufacturer also has a frame-type engine generator. It was necessary to prepare a soundproof type engine generator according to the user's request.
[0005]
The present invention has been made in view of the above circumstances, and it is possible to easily obtain an excellent soundproofing effect as necessary while making the most of the advantages of a frame-type engine generator that is small, light, and low in cost by sharing main parts. It aims at providing the engine generator which can do.
[0006]
[Means for Solving the Problems]
To achieve the above object, an engine generator according to claim 1 of the present invention includes an engine, a generator connected to the engine, and a support frame formed by bending a pipe into a boat shape. In the generator, a base channel that is installed between the left and right pipes that form the lower surface of the support frame, supports the engine and the generator, and a fuel tank that is disposed with the upper surface of the support frame closed. An operation panel attached to the support frame for closing the front surface of the support frame on the generator side, a muffler cover for covering the muffler of the engine and closing the rear surface on the engine side of the support frame, and the support Left and right panels that close the side surface of the support frame by removably engaging the frame, and the base channel And a base plate which closes the lower surface of the support frame by removably attaching to, wherein the removably attaching benzalkonium the caster plate to the lower surface of the base plate which is supported on the base channel having casters at the four corners It is said. The engine generator according to claim 2 of the present invention is characterized in that, in the engine generator according to claim 1, the caster plate is fastened together with the base channel together with the base plate.
[0007]
In other words, the engine generator according to claim 1 is formed by previously closing the upper surface with the fuel tank, the front surface with the operation panel, and the rear surface with the muffler cover, which are also required for the frame type engine engine. When soundproof performance is required in this state, the remaining three surfaces, that is, the left and right side surfaces and the lower surface are respectively closed with the left and right panels and the base plate. For this reason, it is possible to easily obtain an excellent soundproofing effect if necessary while making the main parts common and taking advantage of the small size, light weight and low cost of the frame type engine generator.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 11 relate to an embodiment of the present invention. FIG. 1 is a perspective view from the upper left front of the engine generator, FIG. 2 is a perspective view from the upper right rear of the engine generator, and FIG. FIG. 4 is an explanatory view of attaching each soundproof panel to the engine generator, FIG. 5 is an explanatory view when attaching the left and right panels to the engine generator, and FIG. 6 is attached to each soundproof panel. FIG. 7 is a perspective view from the top right rear of the engine generator with each soundproof panel attached, FIG. 8 is an explanatory view of the structure of the left panel, and FIG. 9 is a soundproof attached. FIG. 10 is a horizontal sectional view of the engine generator showing the attached soundproof panel, and FIG. 11 is an explanatory view of assembly of the inner panel and the outer panel to the seal rubber.
[0009]
1 and 2, reference numeral 1 denotes a frame-type engine generator, and a single-cylinder forced air-cooled engine 2 and a generator 3 are supported and configured inside by a support frame 4.
[0010]
The engine 2 is disposed such that the cylinder head 2a is tilted to the right and the height in the support frame 4 is reduced.
[0011]
Further, as shown in FIG. 3, the crankshaft 2b of the engine 2 is extended toward the front generator 3 side, and a flywheel 2c is provided on the crankshaft 2b. A connecting shaft 5 connected to the rotor 3a at the center of the generator 3 is coupled. In addition, the code | symbol 6 in FIG. 3 is the recoil starter act | operated by pulling the recoil grip 7 mentioned later.
[0012]
A cooling fan 8 that blows air from the generator 3 side to the engine 2 side is fixed to the flywheel 2 c of the engine 2, and the outside of the cooling fan 8 is covered with a fan cover 9. The fan cover 9 is integrally formed with a partition plate 9a that partitions the generator 3 side and the engine 2 side, and a rubber seal (not shown) can be provided around the outer edge of the partition plate 9a. .
[0013]
The support frame 4 is a boat-shaped frame in which the front and rear of a pipe frame 10 formed in a substantially rectangular shape are bent upward and projecting upward. Above the left and right side surfaces formed by the pipe frame 10 are left and right channels in the front and rear direction, respectively. 11L and 11R are installed. A fuel tank 13 is fixed on the left and right channels 11L and 11R with the upper surface of the support frame 4 closed.
[0014]
In addition, front and rear base channels 12f and 12r are installed in front and rear of the lower surface of the support frame 4, respectively. The generator 3 is mainly supported on the front base channel 12f and on the rear base channel 12r. The engine 2 is mainly supported.
[0015]
On the front side of the support frame 4, there is provided an electrical box 14 for taking out output from the engine generator 1 and storing various control components, and is supported by an operation panel 15 that covers the front side of the electrical box 14. The front surface of the frame 4 is closed.
[0016]
The electrical box 14 is partitioned and formed so that a central lower right portion, that is, a portion located on the front side of the generator 3 penetrates forward and backward, and the operation panel 15 located in this portion has a louver 15a. The outside air can be sucked in the direction of the generator 3.
[0017]
A muffler 16 of the engine 2 is provided on the rear surface side of the support frame 4, and the rear surface of the support frame 4 is closed with a muffler cover 17. The muffler cover 17 is provided with a muffler hole 17a for exposing the outlet pipe 16a of the muffler 16 to the rear, and a louver 17b for discharging the internal air to the rear.
[0018]
As shown in FIG. 4, the frame-type engine generator 1 configured as described above closes the left and right side surfaces of the support frame 4 with the left and right panels 21 and 22 and closes the lower surface with the base plate 23. As a result, all six surfaces can be closed freely, and excellent soundproof performance can be obtained by closing all six surfaces. In FIG. 4 and subsequent figures, the detailed illustration of the internal configuration of the engine generator 1 is omitted to describe each of the soundproof panels.
[0019]
That is, the left and right panels 21 and 22 are first hung on the pipe frame 10 of the support frame 4 by using hook portions 35 and 45 described later, as shown in FIG. The upper portions of the left and right panels 21 and 22 are easily inserted into the holes 21a and 22a of the respective panels and screwed into the screw holes 11La and 11Ra of the left and right channels 11L and 11R. The left and right sides can be closed freely.
[0020]
Further, the base plate 23 is formed by inserting bolts 25 into holes 23a drilled at four positions on the front and rear, left and right, and screwing with screw holes screwed on the front and rear base channels 12f and 12r, or previously welded nuts. The lower surface of the support frame 4 can be closed freely.
[0021]
At this time, in the present embodiment, the base plate 23 is provided below the base plate 23 via caster plates 27 provided with casters 26 at four corners. The caster plate 27 is provided with a hole 27 a at the same position as the hole 23 a of the base plate 23, and is fastened together with bolts 25.
[0022]
FIG. 6 and FIG. 7 show a state in which the left and right panels 21 and 22, the base plate 23, and the caster plate 27 are attached to FIGS.
[0023]
As shown in FIGS. 8 to 10, the left panel 21 has a double structure of an inner panel 31 and an outer panel 32, and the inner panel 31 and the outer panel 32 are fixed by covering the outer periphery with a rubber seal 33. Has been.
[0024]
That is, the inner panel 31 is formed by resin molding, and a plurality of convex stiffening portions 31a are formed vertically and horizontally into the engine generator 1 and a plurality of convex portions toward the outer panel 32 side. 31b is formed to improve the strength.
[0025]
In addition, an elongated hole 31c is formed in the front side in the vicinity of the upper edge portion of the inner panel 31, and an elongated hole 31c is formed in the front and rear in the vicinity of the lower edge portion. Further, in the vicinity of the edge of the front and rear vertical sides of the inner panel 31, elongated holes 31c are drilled at three locations, upper, middle and lower, respectively. And the protrusion part 34 of the rubber seal 33 mentioned later is penetrated by these holes 31c, and the inner panel 31 and the outer panel 32 are assembled and fixed by this protrusion part 34.
[0026]
Further, a notch 31 d is formed at a position corresponding to the recoil grip 7 on the upper side of the inner panel 31.
[0027]
The outer panel 32 is formed in a step shape by resin molding, the surface is formed to protrude in a curved shape toward the outside of the engine generator 1, and the substantially central lower portion of the surface protrudes inward in the front-rear direction. Thus, the external appearance of the engine generator 1 is improved and the strength is improved.
[0028]
The flange portion 32a on the outer peripheral portion of the outer panel 32 is provided with a slight inclination necessary for resin molding toward the outside. The inner panel 31 is housed in the outer panel 32 by contacting the outer periphery of the inner panel 31 to the inner surface of the step 32b between the first and second steps of the outer panel 32. .
[0029]
Similarly to the inner panel 31, the step 32b of the outer panel 32 is provided with an elongated hole 32c on the upper side at one location on the front side and an elongated hole 32c on the lower side in the front and rear directions. Yes. Further, elongated holes 32c are formed in the upper, middle, and lower three portions of the step portion 32b on the front and rear vertical sides of the outer panel 32, respectively. The protrusions 34 of the rubber seal 33 are inserted into the holes 32c together with the holes 31c of the inner panel 31, and the inner panel 31 and the outer panel 32 are assembled and fixed by the protrusions 34. Yes.
[0030]
The outer panel 32 also has a recoil grip window hole 32 d formed at a position corresponding to the recoil grip 7 in the same manner as the inner panel 31.
[0031]
The rubber seal 33 is formed so as to cover the outer periphery of the outer panel 32. One protrusion 34 is provided on the inner side of the upper side, two protrusions 34 are provided on the inner side of the lower side, and front and rear vertical frames. Three projections 34 are provided on the inner part of each.
[0032]
As shown in FIG. 11, the protrusion 34 of the rubber seal 33 protrudes long and has a gradually narrowed tip, and the protrusion 34 is easily fitted into the holes 31 c and 32 c. It is formed so that it can be easily gripped and pulled.
[0033]
Further, a hook portion 35 is formed on the lower side portion of the rubber seal 33 so as to be hooked on the pipe frame 10 of the support pipe 4 in the front-rear direction.
[0034]
On the other hand, the right panel 22 is formed in substantially the same manner as the left panel 21 and has a double structure of an inner panel 41 and an outer panel 42. The inner panel 41 and the outer panel 42 cover the outer periphery with a rubber seal 43. It is fixed by.
[0035]
The inner panel 41 is formed by resin molding, and a plurality of convex stiffening portions 41a are formed vertically and horizontally into the engine generator 1, and a plurality of convex portions 41b toward the outer panel 42 are formed. As a result, the strength is improved.
[0036]
An elongated hole 41c is formed in the vicinity of the upper edge portion of the inner panel 41, and an elongated hole 41c is formed in the vicinity of the lower edge portion. Further, in the vicinity of the edge of the front and rear vertical sides of the inner panel 41, elongated holes 41c are formed at three locations, upper, middle and lower, respectively. Then, a protrusion 44 of a rubber seal 43 described later is inserted into these holes 41c, and the inner panel 41 and the outer panel 42 are assembled and fixed by the protrusion 44.
[0037]
The outer panel 42 is formed in a step shape by resin molding, the surface is formed to protrude in a curved shape toward the outside of the engine generator 1, and the substantially central lower portion of the surface protrudes inward in the front-rear direction. Thus, the external appearance of the engine generator 1 is improved and the strength is improved.
[0038]
The flange portion 42a on the outer peripheral portion of the outer panel 42 is provided with a slight inclination necessary for resin molding toward the outside. The inner panel 41 is housed in the outer panel 42 by contacting the outer periphery of the inner panel 41 to the inner surface of the step portion 42b at the boundary between the first step and the second step of the outer panel 42. .
[0039]
In the step 42b of the outer panel 42, similarly to the inner panel 41, an elongated hole 42c is drilled in the front and rear in the upper side, and an elongated hole 42c is drilled in the front and rear in the lower side. ing. Further, elongated holes 42c are formed in the upper, middle, and lower three portions of the step 42b on the front and rear vertical sides of the outer panel 42, respectively. The protrusions 44 of the rubber seal 43 are inserted into the holes 42c together with the holes 41c of the inner panel 41, and the inner panel 41 and the outer panel 42 are assembled and fixed by the protrusions 44. Yes.
[0040]
The rubber seal 43 is formed so as to cover the outer periphery of the outer panel 42. Two protrusions 44 are provided on the inner side of the upper side, and two protrusions 44 are provided on the inner side of the lower side. Three protrusions 44 are provided on the inner part of the frame.
[0041]
The protrusion 44 of the rubber seal 43 protrudes long and has a tip that is gradually narrowed. The protrusion 44 can be easily fitted into the holes 41c and 42c, and can be easily gripped and pulled after being fitted. Has been.
[0042]
Further, a hook portion 45 is formed on the lower side portion of the rubber seal 43 so as to be hooked on the pipe frame 10 of the support pipe 4 in the front-rear direction.
[0043]
When the outer panel 42 is fitted to the rubber seal 43, the flange portion 42a on the outer peripheral portion of the outer panel 42 is formed with a slight inclination toward the outside, so that the flange portion 42a can be easily fitted to the rubber seal 43. Further, after the fitting, the inclination of the flange portion 42a of the outer panel 42 acts as an outward tension, and the outer panel 42 is securely held by the rubber seal 43.
[0044]
Since the left and right panels 21 and 22 are configured as described above, when the left and right panels 21 and 22 are attached to the support frame 4, the rubber seals 33 and 43 are connected to the flange portions 32 a and 42 a of the outer panels 32 and 42 and the pipe frame 10. (The front and rear lower sides) or the left and right channels 11L and 11R (upper sides) are interposed while being deformed in a predetermined manner, so that the soundproofing performance is improved and both the left and right sides are reliably closed.
[0045]
Further, the rubber seals 33 and 43 are interposed, whereby the left and right panels 21 and 22 are attached to the left and right surfaces, and temporary fixing when the screws 24 are screwed can be easily performed.
[0046]
Since the left and right panels 21 and 22 are made of resin, the inner panels 31 and 41 and the outer panels 32 and 42 are both made of resin, so that the high frequency is effectively reduced, and between the inner panels 31 and 41 and the outer panels 32 and 42. An air layer is provided to reliably reduce noise and exhibit excellent soundproofing performance.
[0047]
Further, impact is absorbed by the rubber seals 33 and 43 interposed, and the soundproof performance can be further improved.
[0048]
And although it is a frame type engine generator 1, soundproof performance can be improved just by attaching the left and right panels 21 and 22 and the base plate 23, so the night panels 21 and 22 and the base plate 23 are attached. Excellent versatility, including work that is soundproof.
[0049]
【The invention's effect】
As described above, according to the present invention, it is possible to easily obtain an excellent soundproofing effect as necessary while making the main parts common and taking advantage of the frame type engine generator that is small, light and low cost. Can do.
[Brief description of the drawings]
FIG. 1 is a perspective view from the upper left front of the engine generator. FIG. 2 is a perspective view from the upper right rear of the engine generator. FIG. 3 is an explanatory diagram of the connection between the engine and the generator. Explanatory view of attaching each soundproof panel to the machine [Fig. 5] Explanatory view of attaching the left and right panels to the engine generator [Fig.6] Perspective view from the top left front of the engine generator with each soundproof panel attached [Fig.7] FIG. 8 is an explanatory view of the structure of the left panel. FIG. 9 is a cross-sectional view of the engine generator showing the installed soundproof panel. Horizontal cross section of engine generator showing soundproof panel [Fig. 11] Illustration of assembly of inner panel and outer panel to seal rubber [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Engine generator 2 Engine 3 Generator 4 Support frame 10 Pipe frame 13 Fuel tank 15 Operation panel 17 Muffler cover 21 Left panel 22 Right panel 23 Base plate

Claims (2)

In an engine generator comprising an engine, a generator connected to the engine, and a support frame formed by bending a pipe into a boat shape,
A base channel constructed between the left and right pipes forming the lower surface of the support frame, and supporting the engine and the generator;
A fuel tank disposed by closing the upper surface of the support frame;
An operation panel attached to the support frame for closing the front surface of the support frame on the generator side;
A muffler cover that covers the muffler of the engine and closes a rear surface of the support frame on the engine side;
Left and right panels that close the sides of the support frame by detachably locking to the support frame;
And a base plate which closes the lower surface of the support frame by removably attaching to the base channel,
4 engine generator the caster plate and wherein the removably mounted Turkey the lower surface of the base plate which is supported on the base channel having a caster in the corner.   The engine generator according to claim 1, wherein the caster plate is fastened together with the base plate together with the base channel.

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