JP2003120312A - Engine generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily provide excellent sound insulating performance as needs arise while making the most of good points of a frame type engine generator that is small-sized, light in weight and low in 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 15, a muffler cover 17 and a fuel tank 13. A left and a right surfaces of the support frame 4 can be easily blocked by hooking a left and a right panel 21, 22 on a pipe frame 10 of the support frame 4 at lower ends and fixing upper ends thereof with screws 24. An upper surface of the support frame 4 can be easily blocked by threadedly fixing a base plate 23.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine generator having an engine and a generator supported by a support frame. 2. Description of the Related Art Hitherto, various frame-type engine generators have been 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. ing. Since the frame-type engine generator is not covered with the panel on each side of the frame, it has an excellent advantage that it is small and light, and can be configured at a low cost with a small number of parts. Further, such a frame-type engine generator is provided with a control panel and a muffler cover at the front and rear as shown in, for example, Japanese Patent Application Laid-Open No. 2000-213361. It is not configured as such. [0004] For this reason, conventional frame-type engine generators including the above-mentioned prior art have the advantages of small size, light weight and low cost as described above, but all of them have advantages. The disadvantage is that the noise is intense because the surface is open. 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 is designed with many different parts from the frame type engine generator in order to obtain the soundproofing effect, and has the problem that the above advantages of the frame type engine generator cannot be obtained. From such a situation, the user must use a frame-type engine generator and a soundproof-type engine generator in accordance with the working environment and cost, and the maker side also uses the frame-type engine generator. It was necessary to prepare a soundproof type engine generator according to a user's request. [0005] The present invention has been made in view of the above circumstances,
An object of the present invention is to provide an engine generator that can easily obtain an excellent soundproofing effect as necessary while taking advantage of the advantages of a frame-type engine generator that is small, lightweight and low-cost by sharing the main components. I do. In order to achieve the above object, an engine generator according to a first aspect of the present invention comprises: an engine; a generator driven by being connected to the engine; In an engine generator having a support frame for supporting the generator therein, an operation of closing a fuel tank disposed by closing an upper surface of the support frame and closing a front surface of the support frame on the generator side. A panel and a muffler cover for closing a rear surface of the support frame on the engine side, a left panel capable of closing a left side surface of the support frame, and a right panel capable of closing a right side surface of the support frame, A base plate capable of closing a lower surface of the support frame is provided. That is, the engine generator according to the first aspect of the present invention has a fuel tank, an upper surface of which is required beforehand, a front surface of the operation panel, and a rear surface of which is closed by a muffler cover. Form. In this state, when soundproofing is required, the remaining three surfaces, that is, the left and right side surfaces and the lower surface, are closed by the left and right panels and the base plate, respectively. For this reason, it is possible to easily obtain an excellent soundproofing effect as needed while making use of the advantages of the frame-type engine generator of small size, light weight and low cost by sharing the main parts. Embodiments of the present invention will be described below 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 connecting soundproof panels to an engine generator, FIG. 5 is an explanatory view of attaching left and right panels to an engine generator, and FIG. 6 is a view illustrating each soundproof panel. FIG. 7 is a perspective view from the upper 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 cross-sectional view of the engine generator shown on the panel, FIG. 10 is a horizontal cross-sectional view of the engine generator showing the attached soundproof panel, and FIG. 11 is an explanatory view of assembling the inner panel and the outer panel to the seal rubber. In FIG. 1 and FIG. 2, reference numeral 1 denotes a frame-type engine generator, in which a single-cylinder forced air-cooled engine 2 and a generator 3 are supported inside by a support frame 4. The engine 2 is arranged such that the cylinder head 2a is inclined to the right and the height within the support frame 4 is reduced. As shown in FIG. 3, a crankshaft 2b of the engine 2 extends forward toward the generator 3, and a flywheel 2c is provided on the crankshaft 2b. A connection shaft 5 that is connected to the center rotor 3a of the generator 3 is connected to the wheel 2c. Reference numeral 6 in FIG. 3 denotes a recoil starter that is operated by pulling a recoil grip 7 described later. A cooling fan 8 for blowing air from the generator 3 to the engine 2 is fixed to the flywheel 2 c of the engine 2. 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 for partitioning 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. . The support frame 4 is a boat-shaped frame formed by bending and projecting the front and rear of a substantially rectangular pipe frame 10 upward and downward. Left and right channels 11L and 11R are provided on the right side. 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. The front and rear base channels 12f and 12r are respectively provided in front and rear of the lower surface of the support frame 4 in the left and right direction.
The generator 3 is mainly supported on the front base channel 12f, and the engine 2 is mainly supported on the rear base channel 12r. On the front side of the support frame 4, there is provided an electric box 14 for taking out output from the engine generator 1 and storing various control parts. An operation panel for covering the front side of the electric box 14 is provided. At 15, the front surface of the support frame 4 is closed. The electrical box 14 is formed so that a lower right portion in the center, that is, a portion located on the front side of the generator 3 is formed so as to penetrate forward and backward, and an operation panel 15 located in this portion is formed. A louver 15a is formed so that outside air can be sucked in the direction of the generator 3. The engine 2 is mounted on the rear side of the support frame 4.
The muffler 16 is provided, and the rear surface of the support frame 4 is closed by a muffler cover 17. The muffler cover 17 has an outlet pipe 16 a of the muffler 16.
And a louver 1 for exhausting the inside air rearward, provided with a muffler hole 17a for exposing the rear side.
7b is formed. As shown in FIG. 4, the frame-type engine generator 1 constructed as described above has the left and right side surfaces of the support frame 4 closed by left and right panels 21 and 22, respectively, and the lower surface thereof is formed by a base plate 23. , All six surfaces can be freely closed, and excellent soundproofing performance can be obtained by closing all six surfaces. Note that, in FIG. 4 and subsequent figures, a detailed illustration of the internal configuration of the engine generator 1 is omitted to explain each of these soundproof panels. That is, first, as shown in FIG. 5, the left and right panels 21 and 22 have hook portions 35, which will be described later, at their lower ends.
Using 45, it hangs on the pipe frame 10 of the support frame 4. Then, above the left and right panels 21 and 22, screws 24 are inserted into the holes 21a and 22a of the respective panels.
Screw holes 11La, 11 for left and right channels 11L, 11R
By screwing it to Ra, the support frame 4 can be easily
The left and right side faces are freely closed. In the base plate 23, bolts 25 are inserted through holes 23a formed at four positions in front, rear, left and right, and are bolted with screw holes screwed into the front and rear base channels 12f, 12r or with a nut welded in advance. By doing so, the lower surface of the support frame 4 can be closed freely. At this time, in this embodiment, the base plate 23 is provided below the base plate 23 via caster plates 27 having 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 by a bolt 25. FIGS. 6 and 7 show the left and right panels 21 and 22, the base plate 23, and the caster plate 27 attached to FIGS. 1 and 2, respectively. As shown in FIGS. 8 to 10, the left panel 2
1 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. That is, the inner panel 31 is formed by resin molding, and a plurality of convex stiffening portions 31a are formed vertically and horizontally toward the inside of the engine generator 1 and a plurality of stiffening portions 31a are formed toward the outer panel 32 side. Are formed to improve the strength. Near the upper edge of the inner panel 31, there is one elongated hole 31c on the front side, and near the lower edge,
Elongated holes 31c are formed in the front and rear, respectively. Further, in the vicinity of the edges of the front and rear vertical sides of the inner panel 31, elongated holes 31c are formed at three locations, namely, upper, middle, and lower portions. A projection 34 of a rubber seal 33 to be described later is inserted into these holes 31c, and the inner panel 31 and the outer panel 32 are fixedly assembled by the projection 34. A notch 31d is formed at a position corresponding to the recoil grip 7 on the upper side of the inner panel 31. The outer panel 32 is formed in a step shape by resin molding, has a surface protruding in a curved shape toward the outside of the engine generator 1, and has a substantially central lower portion of the surface extending in the front-rear direction. By projecting inward, the appearance of the engine generator 1 is improved and the strength is improved. Flange portion 3 on outer peripheral portion of outer panel 32
2a is provided with a slight inclination necessary for resin molding toward the outside. Then, the first stage of the outer panel 32 and the second stage
The outer periphery of the inner panel 31 is in contact with the inner surface of the step 32b at the boundary of the step, and the inner panel 31 is
2 are stored. As in the case of the inner panel 31, the step 32b of the outer panel 32 has one elongated hole 32c on the front side at the upper side and the elongated hole 32c at the front side at the lower side. Is established. Furthermore, the outer panel 3
Elongated holes 32c are drilled at three locations, upper, middle, and lower, respectively, in the step portion 32b on the front and rear vertical sides of the two. The projections 34 of the rubber seal 33 are inserted into these holes 32c together with the respective holes 31c of the inner panel 31, and the projections 34 allow the inner panel 31 and the outer panel 32 to be assembled and fixed. I have. The outer panel 32 also has a position corresponding to the recoil grip 7 like the inner panel 31.
A window hole 32d for recoil grip is formed. 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 front side inside the upper side, and the protrusions 3 are provided inside and below the lower side.
4 are provided on the inner portions of the front and rear vertical frames.
4 are provided. As shown in FIG. 11, the protrusion 34 of the rubber seal 33 is long and protrudes, and the tip is formed gradually thinner. The protrusion 34 is easily fitted into the holes 31c and 32c, and furthermore, is fitted. After that, it is easy to grasp the tip and pull it. On the lower side of the rubber seal 33, a hook portion 35 is formed so as to be hooked on the pipe frame 10 of the support pipe 4 back and forth. On the other hand, the right panel 22 is formed substantially in the same manner as the left panel 21, and includes an inner panel 41 and an outer panel 42.
The inner panel 41 and the outer panel 42 are fixed by covering the outer periphery with a rubber seal 43. The inner panel 41 is formed by resin molding. The inner panel 41 has a plurality of stiffening portions 41a projecting in the engine generator 1 vertically and horizontally.
A plurality of convex portions 41b are formed toward the two sides to improve the strength. In the vicinity of the upper edge of the inner panel 41, elongated holes 41c are drilled forward and backward, and in the vicinity of the lower edge, elongated holes 41c are drilled forward and backward.
Further, in the vicinity of the edges of the front and rear vertical sides of the inner panel 41, elongated holes 41c are formed at three places, namely, upper, middle, and lower portions. A protrusion 44 of a rubber seal 43 to be 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. The outer panel 42 is formed in a step shape by resin molding, and has a surface protruding in a curved shape toward the outside of the engine generator 1. By projecting inward, the appearance of the engine generator 1 is improved and the strength is improved. Flange portion 4 on outer peripheral portion of outer panel 42
2a is provided with a slight inclination necessary for resin molding toward the outside. Then, the first stage of the outer panel 42 and the second stage
The outer surface of the inner panel 41 is in contact with the inner surface of the step portion 42b at the boundary of the step, and the inner panel 41 is
2 are stored. As in the case of the inner panel 41, an elongated hole 42c is drilled forward and backward in the step 42b of the outer panel 42, and an elongated hole 42c is formed in the lower edge.
Are drilled before and after, respectively. In addition, the upper and lower middle 3
An elongated hole 42c is formed at the location. 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. I have. 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. In each of the inner portions of the front and rear vertical frames, three projections 44 are provided. The protrusion 44 of the rubber seal 43 is long and protrudes, and the tip is gradually narrowed. The protrusion 44 is easily fitted into the holes 41c and 42c, and the tip is gripped after being fitted. It is formed to be easy to pull. On the lower side of the rubber seal 43, a hook portion 45 is formed so as to be hooked on the pipe frame 10 of the support pipe 4 back and forth. Then, the outer panel 42 is
3, the flange portion 42a of the outer peripheral portion of the outer panel 42 is formed with a slight inclination toward the outside.
It is easy to fit into the outer panel 4 after fitting.
The inclination of the second flange portion 42 a acts as an outward tension, and the outer panel 42 is securely held by the rubber seal 43. Since the left and right panels 21 and 22 are configured as described above, when attaching the left and right panels 21 and 22 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. Pipe frame 10 (lower front and rear sides) or left and right channel 11
Since it is interposed while being deformed in a predetermined manner between L and 11R (upper side), soundproofing performance is improved and both left and right sides are reliably closed. Further, since the rubber seals 33 and 43 are interposed, the right and left panels 21 and 22 can be attached to the left and right surfaces, and the screws 24 can be easily temporarily fixed when screwed. The left and right panels 21 and 22 are
Since the outer panels 1 and 41 and the outer panels 32 and 42 are both made of resin, the high frequency can be effectively reduced.
An air layer is provided between the outer panels 1 and 41 and the outer panels 32 and 42, so that noise can be reliably reduced and excellent soundproof performance can be exhibited. Further, shocks are absorbed by the rubber seals 33 and 43 interposed therebetween, so that the soundproof performance can be further improved. Although the frame-type engine generator 1 can improve the soundproofing performance only by attaching the left and right panels 21, 22 and the base plate 23, the left and right panels 21, 22 and the base plate 23 can be used at night. It is excellent in versatility, for example, it is possible to work with soundproofing by attaching it. According to the present invention as described above,
It is possible to easily obtain an excellent soundproofing effect as required, while making use of the advantages of a frame-type engine generator of small size, light weight and low cost by sharing the main parts.

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 a description of the connection between the engine and the generator. [Fig. 4] Explanatory diagram for attaching each soundproof panel to the engine generator [Fig. 5] Explanatory diagram when attaching left and right panels to the engine generator [Fig. FIG. 7 is a perspective view from the top right and rear of the engine generator with each soundproof panel attached. FIG. 8 is an explanatory view of the structure of the left panel. FIG. 9 is a cross section of the engine generator showing the attached soundproof panel. FIG. 10 is a horizontal sectional view of the engine generator showing the attached soundproof panel. FIG. 11 is an explanatory view of assembling the inner panel and the outer panel to the seal rubber. [Description of References] 1 Engine generator 2 Engine 3 Generator 4 Support Frame 10 pipe frame 13 a fuel tank 15 operation panel 17 muffler cover 21 left panel 22 right panel 23 base plate

Claims (1)

Claims: 1. An engine generator comprising an engine, a generator connected to and driven by the engine, and a support frame for supporting the engine and the generator therein. A fuel tank disposed so as to close an upper surface of a support frame, an operation panel for closing a front surface of the support frame on the generator side, and a muffler cover for closing a rear surface of the support frame on the engine side. An engine, comprising: a left panel capable of closing a left side surface of the support frame, a right panel capable of closing a right side surface of the support frame, and a base plate capable of closing a lower surface of the support frame. Generator.