JP3065007U - Engine generator - Google Patents

Abstract

(57) [Summary] [Problem] A case structure, mounting of a fuel tank, and
An object of the present invention is to provide an engine generator with improved vibration resistance. An engine and a generator driven by the engine are mounted on a base, and in an engine generator housed in a case, a hollow base (2) for installing a fuel tank (1); 2, a fuel tank 1 inserted in the center of the fuel tank 1, a base cover 3 provided above the fuel tank 1, an engine base 4 and a generator base 5 provided above the base cover 3, And a common base 7 screwed with the generator base 5 and vibration isolating members 6 and 6 ′ interposed therebetween, and the case 8 is partially open around the engine 9. An engine generator is the solution.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a case structure, mounting of a fuel tank, and an engine generator with improved vibration resistance.

[0002]

[Prior art]

 Conventionally, generators and welders driven by engines have been used in construction of buildings and bridges, and in construction sites such as oil storage tanks and pipelines. For example, in the conventional engine generator 100, as shown in FIG. 6, an engine 102 and a generator 103 with a built-in cooling fan driven by the engine 102 are installed on a base 101, and these are connected to an outside air inlet 104a. , 104b and a soundproof case 104 having a discharge port 106, outside air is introduced into the soundproof case 104 from outside air inlets 104a, 104b, and a predetermined cooling air passage for the generator 103 and the engine 102 is formed. The main part includes an engine fan for discharging hot air from the outlet 106 to the outside of the soundproof case 104 through the outlet 106, and a fuel tank 105 for supplying fuel to the engine 102.

[0003]

[Problems to be solved by the invention]

 However, in the engine generator 100 having the conventional structure, the entire device is surrounded by the soundproof case 104 to reduce the sound of the engine 102 and the like, and the inside of the soundproof case 104 is partitioned or the duct or the like is further reduced to further reduce the sound. Therefore, the engine generator 100 using the low-noise engine 102 is too wasteful in the conventional structure, so that the size is increased and the cost is increased. In addition, it is necessary to mount a large fuel tank 105 on the engine generator 100 that can be operated for a long time, and as shown in FIG. Therefore, when lifting the entire engine generator 100, the suspension balance was affected by the increase and decrease in fuel, and the suspension balance was poor. In addition, when the large fuel tank 105 is mounted, the suspension balance becomes remarkably poor, and there is a limit to increasing the capacity of the fuel tank 105. In addition, the engine 102 and the generator 103 come into contact with the inner surface of the soundproof case 104 due to an impact such as sudden start, sudden stop, or running on a bad road during transportation of the engine generator 100, and the soundproof case 104 and its parts. Etc. could be damaged.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an engine generator having an improved case structure, a fuel tank, and vibration resistance.

[0005]

[Means for Solving the Problems]

 The gist of the invention set forth in claim 1 of the engine generator according to the present invention for solving the above-mentioned problem is that an engine and a generator driven by the engine are installed on a base. In the engine generator housed in the case, a hollow base for installing a fuel tank, a fuel tank inserted in the center of the base, a base cover provided on an upper part of the fuel tank, An engine base and a generator base provided in the vicinity of a base cover; and a common base screwed with the engine base and the generator base interposed with a vibration isolating member. Is characterized in that a part of the opening is opened. By effectively utilizing the hollow base and mounting the fuel tank in the center, not only can the capacity of the fuel tank be increased, but also the center of gravity of the engine generator as a whole can be lowered, so the engine generator Stabilization is achieved during lifting. In particular, the deviation of the center of gravity of the engine generator due to the decrease in fuel in the fuel tank is reduced. In addition, the balance when the engine generator is lifted is no longer affected by the amount of fuel in the tank. Furthermore, by mounting a low-noise engine, the case can be partially opened in three directions, which makes it possible to reduce the weight of engine generators and reduce the cost of components.

According to another aspect of the present invention, there is provided an engine generator, wherein the engine base, the generator base, and the common base are formed of a channel steel, And a notch at the center of the channel steel flange facing the inside of the generator base, and the engine base, the generator base, and the common base are provided with the vibration isolating member interposed therebetween. The engine generator according to claim 1, wherein the engine generator is loosely screwed. By loosely fitting the engine base, the generator base, and the common base with the vibration isolating member interposed therebetween, the axial movement of the engine generator of the vibration isolating member is restricted, and the engine base and the power generation By providing a notch in the center of the opposed channel steel flange inside the machine base, the movement of the vibration damping member in the axial direction of the engine generator (in the width direction of the engine generator) is prevented. The engine and generator can contact the inner surface of the case and damage the case and parts in the case due to the impact of sudden start, sudden stop, or running on rough roads, etc. Disappears.

[0007]

[Embodiment of the invention]

 The configuration of the engine generator according to the present invention will be described with reference to the drawings. 1 (a) is a plan view of the engine generator according to the present invention, FIG. 1 (b) is a left side view of the engine generator according to the present invention, and FIG. 1 (c) is an engine according to the present invention. Front view of the generator, FIG. 2 is an overall perspective view showing the structural members of the engine generator according to the present invention, FIG. 3 is a perspective view when a fuel tank is attached to the base of the engine generator according to the present invention, FIG. 4 is a perspective view of the common base of the engine generator according to the present invention, and FIG. 5A is an enlarged view of a main part showing a state in which the generator base of the present invention and the common base are loosely screwed. FIG. 5B is an enlarged plan view of a main part showing a state in which the engine base, the generator base and the common base according to the present invention are loosely screwed into the common base.

As shown in FIGS. 2, 3 and 4, the engine generator according to the present invention has a hollow base 2 for installing a fuel tank 1 and a base cover provided on the upper part of the fuel tank 1. 3, an engine base 4 and a generator base 5 provided in the vicinity of the base cover 3, and an anti-vibration rubber 6, 6 'as an anti-vibration member and the engine base 4 and the generator base 5. A common base 7 for mounting an engine 9 and a generator 10 which are mounted and loosely screwed in, and a case 8 surrounding the common base 7 and the generator 9 are provided. As shown in FIG. 1 (b), three openings are provided on the roof panel 8c side and the left and right side panels 8d and 8e sides around the engine. The common base 7 may be simply attached by screwing the engine base 4 and the generator base 5 with the vibration isolating rubbers 6 and 6 'interposed therebetween.

As shown in FIG. 2, the base 2 is a rectangular hollow base having an open upper part, and an engine base 4 and a power generator are provided near a base cover 3 provided on the upper part of the base 2. An engine base 5 is mounted, and an engine 9 and a generator 10 are mounted on the engine base 4 and the generator base 5 via a common base 7 as shown in FIG. As shown in FIG. 3, a semicircular opening 2a for a fuel drain is provided substantially at the lower center of the base 2 in the longitudinal direction.

By providing openings 2b, 2c and 2d as shown in FIG. 2 around the base 2 so that cooling air can flow through the surface of the fuel tank 1, the fuel tank 1 is cooled. The effect is improved. That is, since the engine 9 and the generator 10 are provided on the fuel tank 1 as shown in FIG. 4, the fuel tank 1 is operated in cooperation with the engine fan 9a and the cooling fans 10a and 10b built in the generator 10. Cold air is introduced by tracing around the air to suck up air, and the cooling effect of the fuel tank 1 is improved. Further, the base cover 3 and the common base 7 can shield the exhaust air from the generator and the residual heat of the engine 9 and the like.

The fuel tank 1 is a rectangular tank as shown in FIGS. 1 and 3, and is provided with a flange 1a along the entire periphery of a substantially middle portion in the vertical direction. The flange 1a is fixed to a bracket 1b provided in the base 2 with bolts and nuts. A cylindrical filler neck 1c serving as a fuel supply port is provided at an upper portion of the fuel tank 1, and a circular stopper (not shown) for draining a fuel (not shown) is provided at the center of one end in the longitudinal direction inside the fuel tank 1. Is provided. The bottom of the fuel tank 1 is provided with a step inside the tank so that the circumference becomes slightly higher with the drain sheet part being the lowest part. By providing the step, the drain can be easily removed.

By making the base 2 hollow and mounting the fuel tank 1 therein, not only the machine is not installed inside the hollow base 2 but also the capacity of the fuel tank 1 can be increased, Since the center of gravity of the entire engine generator can be made lower by the weight of the fuel tank 1 and the fuel, the entire engine generator can be stabilized. In addition, since the balance at the time of lifting the engine generator is not affected by the amount of fuel in the fuel tank 1, the lifting operation is facilitated. Furthermore, by installing the fuel tank 1 in the base 2, a protective structure is provided so that when fuel leaks from the fuel tank 1 at the time of fuel supply, the fuel does not directly hit the machine constituting the engine generator. Since there is no need, safety is improved.

As shown in FIG. 3, the base cover 3 is a substantially rectangular plate material, and is fixed in the width direction at a substantially upper central position of the base 2. By providing the base cover 3, radiant heat from the engine 9 and the generator 10 side and radiant heat due to residual heat of the machine after the engine generator is stopped can be reflected and shielded. Further, a heat insulating material may be provided on the base cover 3 in order to shield heat generated from the engine 9 and the generator 10.

As shown in FIG. 4, the members used to attach the engine 9 and the generator 10 to the base 2 include an engine base 4, a generator base 5, and vibration isolating rubbers 6, 6 ′ interposed therebetween. The main part is configured to include an H-shaped common base 7 which is loosely screwed in.

The engine base 4 has a plurality of bolt holes and a notch at the center of the flange on the front frame 8b side, with the opening of the channel steel facing up. It is a character-shaped member. A groove-shaped gutter 4a (FIG. 4) for discharging the drain of engine oil to the outside of the engine generator is provided adjacent to the rear frame 8a side of the engine base 4. Like the engine base 4, the cross-sectional shape of the groove-shaped gutter 4a is a U-shape with an opening facing upward, and the groove-shaped gutter 4a is a member having an open end face that is in contact with the outside. The engine base 4 is fixed adjacent to the case 8 so as to have a gentle downward slope from the inside to the outside of the case 8.

Similar to the engine base 4, the generator base 5 has a cross section in which a notch is provided at a central portion of a plurality of bolt holes and a flange on the rear frame 8 a side with the opening of the channel steel facing upward. It is a member having a U-shaped upper surface.

The common base 7 is an H-shaped member as shown in FIG. A plurality of bolt holes having a cross-sectional shape similar to that of the plate material 7c with the opening downward are provided at both ends in the longitudinal direction of the plate 7c having a substantially groove-shaped cross-sectional shape with the opening downward. It is formed by fixing U-shaped channel steels 7a and 7b below. The common base 7 is loosely screwed into openings of the engine base 4 and the generator base 5 with vibration isolating rubbers 6, 6 'interposed therebetween. The base of the engine 9 is fixed to the common base 7 by bolts and nuts N2 and N2 ', and the base of the generator 10 is fixed to the common base 7 by bolts and nuts N1 and N1'. The vibration-isolating rubbers 6, 6 'are mainly used where the direction of the force applied to the member is in the direction of compressing the member, and is a substantially cylindrical elastic body. It is provided between the engine 9 and the common base 7 to which the generator 10 is attached.

Next, a state in which the generator base 5 and the channel steel 7a of the common base 7 are loosely screwed together with the vibration-proof rubber 6 'interposed therebetween, with reference to FIG. Will be explained. An anti-vibration rubber 6 'is interposed so that the opening of the channel steel 7a of the common base 7 and the opening of the channel steel of the generator base 5 face each other, and the channel steel 7a of the common base 7 is provided. The length of the web of the generator base 5 is shorter than the length of the web of the channel steel of the generator base 5, and the web is screwed so as to be held by the channel steel of the generator base 5. Further, the flange of the channel steel of the generator base 5 and the flange of the channel steel 7a of the common base 7 are provided at positions overlapping each other when viewed from the side. The screws are screwed with sufficient gaps S1 and S1 'so that the flanges do not come into contact with each other and become a noise source. By screwing in this way, generation of noise is suppressed, and a strong force is applied in the axial direction of the engine generator (the left-right direction in FIG. 5A), so that the vibration isolating rubber 6 'is deformed, Even if the base 7 moves more than necessary, the flange of the channel steel of the generator base 5 can receive the flange of the channel steel 7a of the common base 7, so that the strength of the vibration isolating rubber 6 'can be maintained. it can. Since the engine 9 and the generator 10 are fixed on the common base 7, the engine 9 and the generator 10 do not come into contact with the inner surface of the case 8 to damage the case 8 and components. The channel steel 7b of the engine base 4 and the common base 7 is similarly loosely screwed.

Next, referring to FIG. 5B, a state in which the engine base 4, the generator base 5 and the common base 7 are loosely screwed together with the vibration isolating rubbers 6 and 6 ′ therebetween. explain. At the center of the channel steel flanges facing each other inside the engine base 4 and the generator base 5, as shown in FIG. When the screw 6 is interposed and screwed in, there are appropriate gaps S2, S2 ', S3, and S3' so as not to come into contact with the plate 7c of the common base 7 due to vibration of the engine generator or the like and become a noise source. . By doing so, a sudden force is applied in the left-right direction (the direction perpendicular to the axial direction of the engine generator) in FIG. When trying to move more than necessary, the notch of the flange of the channel steel of the engine base 4 and the generator base 5 has a cross-sectional shape that is substantially groove-shaped with an opening facing down. Since the plate member 7c can be received, the strength of the vibration isolation rubbers 6, 6 'can be maintained. Since the engine 9 and the generator 10 are fixed on the common base 7, the engine 9 and the generator 10 do not come into contact with the inner surface of the case 8 to damage the case 8 and components.

The case 8 is composed of a plurality of plates surrounding the engine 9 and the generator 10 after the engine 9 and the generator 10 are mounted on the base 2. As shown in FIG. 1, it is composed of a rear frame 8a, a front frame 8b, a roof panel 8c, and left and right side panels 8d and 8e. The roof panel 8c around the engine 9 and the left and right side panels 8d, 8e are provided with large openings 8c, '8d', 8e 'for reducing the number of members and reducing costs. Rainwater entering the case 8 through the openings 8c ', 8d', 8e 'is discharged to the outside through a plurality of drain holes provided at the bottom of the base 2 (not shown). The front frame 8b and the base 2 are provided with a cooling air inlet f and an opening 2b.

By mounting the low-noise engine 9, it is possible to partially open three directions around the engine 9, and it is possible to avoid trouble of the control device on the generator 10 side due to rain. In addition, it is possible to reduce the weight and cost of the members.

Note that the present invention is not limited to the engine generator alone, but may be used for an engine welding machine having the configuration of the present invention.

[0023]

[Effect of the invention]

 According to the present invention having the above structure, 1) not only can the capacity of the fuel tank be increased by effectively utilizing the hollow base and mounting the fuel tank at the center thereof, but also the engine generator Since the center of gravity of the whole can be lowered, stabilization can be achieved. In particular, the deviation of the center of gravity of the engine generator due to the decrease in fuel in the fuel tank is reduced. In addition, the balance at the time of lifting to transport the engine generator is not affected by the amount of fuel in the tank. Furthermore, by mounting a low-noise engine, the case can be partially opened in three directions, which makes it possible to reduce the weight of the engine generator and the cost of components. 2) The engine base, the generator base, and the common base are loosely fitted and screwed together with the vibration isolating member interposed therebetween, thereby restricting the axial movement of the vibration isolating member, thereby reducing the engine base and the power generation. By providing a notch at the center of the opposed channel steel flange inside the machine base, movement of the shaft in the vertical direction (the width direction of the engine generator) can be restricted, so that during the transportation of the engine generator, The engine and generator in the case will not come into contact with the inner surface of the case due to the impact of sudden start, sudden stop, or running on rough road, and the case and parts will not be damaged.

[Brief description of the drawings]

FIG. 1A is a plan view of an engine generator according to the present invention. (B) is a left side view of the engine generator according to the present invention. (C) It is a front view of the engine generator concerning this invention.

FIG. 2 is an overall perspective view showing a structural member of the engine generator according to the present invention.

FIG. 3 is a perspective view of the engine generator according to the present invention when a fuel tank is attached to the base.

FIG. 4 is a perspective view of a common base of the engine generator according to the present invention.

FIG. 5A is an enlarged side view of a main part showing a state in which the generator base and the common base according to the present invention are loosely screwed together. (B) It is the top view which expanded the principal part which shows the state in which the engine base of this invention, a generator base, and a common base are loosely screwed.

FIG. 6A is a plan view of a conventional engine generator. (B) It is a left view of the conventional engine generator. (C) It is a front view of the conventional engine generator.

[Explanation of symbols]

 Reference Signs List 1 fuel tank 2 base 2a opening 2b, 2c, 2d opening 3 base cover 4 engine base 4a groove-shaped gutter 5 generator base 6, 6 'anti-vibration rubber 7 common base 7a, 7b grooved steel 7c plate material 8 Case 8a Rear frame 8b Front frame 8c Roof panel 8d, 8e Side panel 8c ', 8d', 8e 'Opening 9 Engine 9a Engine fan 10 Generator 10a, 10b Cooling fan f Cooling outside air intake port S1, S2, S3 Clearance S1 ', S2', S3 'Clearance

Claims (2)

[Utility model registration claims] An engine and a generator driven by the engine are mounted on a base, and the engine generator is housed in a case. A hollow base for installing a fuel tank; A fuel tank inserted into a central portion; a base cover provided above the fuel tank; an engine base and a generator base provided near the base cover; the engine base and the generator base; An engine generator comprising: a common base that is screwed in with an intervening member; and the case has a part opened around the engine. 2. The engine base, the generator base, and the common base are formed from channel steel, and a notch is formed in a central portion of a flange of the channel steel facing inside the engine base and the generator base. 2. The engine generator according to claim 1, further comprising a portion, wherein the engine base, the generator base, and the common base are loosely screwed together with the vibration isolating member interposed therebetween. 3.