JPS6357610B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement of a case-housed engine generator in which an air-cooled engine, a generator, and auxiliary equipment are housed in a case.

(Prior art) Case-housed engine generators have been widely used in the past, but in conventional case-housed engine generators, the air cleaner is placed anywhere inside the case, and the intake holes are also located outside the case. It is customary to have an opening towards the end (Utility Model Publication No. 56-50141).

As a result, high-temperature air inside the case flows into the intake hole, resulting in a problem in that the output of the engine decreases and intake noise leaks out of the case.

(Object of the Invention) An object of the present invention is to provide a case-housed engine generator that allows low-temperature intake air to flow in through the intake hole of an air cleaner and prevents intake noise from leaking to the outside.

(Structure of the Invention) The present invention relates to a case-housed engine generator in which an air-cooled engine, a generator, and auxiliary equipment are housed in a case having a substantially rectangular external shape. A silencer is placed on one side of the engine, a cooling fan is placed on the other side of the engine, and an air cleaner is placed in a space on the low temperature side separated by a partition member provided on the outer periphery of a fan cover that covers the cooling fan. The air cleaner is formed of a substantially container-shaped air cleaner main body with an open front side of the case, an element housed in the main body, and a removable cover that covers the air cleaner main body so as to press the element from the front side of the case. The case-housed engine generator is characterized in that the air intake hole is formed to open toward the inside of the case, and the opposite end of the air cleaner body is formed to communicate with the intake device of the engine. .

(Example) In FIG. 1 showing a case-housed engine generator to which the present invention is applied, 2 is a case, and the case 2, which has an approximately rectangular external shape, accommodates an engine, a generator, and auxiliary equipment, which will be described later. has been done. Case 2
The upper part of the fuel tank 4 is exposed on the upper surface of the
A handle 6 is provided above the fuel tank 4. A fuel filler port 8 and an oil level gauge 10 are provided on the front side of the upper surface of the fuel tank 4 .

The front panel 12 of the case 2 includes a front panel 14 and an air cleaner cover 1 necessary for operation and maintenance.
6, starter handle 18, lubricating oil filler port 20
(In both cases, the operation parts) are arranged in a concentrated manner.

As shown in FIG. 2, the case 2 includes a front plate 12, a rear plate 22, a right side plate 24, a left side plate 26, and a bottom plate 2.
8 are assembled with screws into a substantially rectangular parallelepiped shape with an open top, and the top opening is covered with the fuel tank 4. An opening 30 is provided at the top of the front panel 12 for attaching the front panel 14.
An opening 31 for the starter handle 18, an opening 20a for the lubricating oil filler port 20, and a louver 12a are formed in the lower part. Louvers 2 are also installed on the rear panel 22, right panel 24, and left panel 26, respectively.
2a, 24a, and 26a are formed. Bottom plate 2
8 is provided with an annular projection 32 for mounting an engine and a generator, and a mounting leg 34 is positioned on the annular projection 32 and fixed with a bolt 34a. The mounting bolts 36 are tightened from the bottom side of the bottom plate 28. A tool attachment hole 38 is provided in the bottom plate 28, and the head 40a of the tool 40 is fitted into the cap 38b which is fitted into the protrusion 38a of the tool attachment hole 38, and the tool 40 can be attached and detached using the attachment rubber 42. It is installed. Further, legs 44 are fixed to the bottom surface of the bottom plate 28.

In FIG. 3, which is seen from the front with the front panel 12 removed from the case-housed engine generator in the assembled state, the engine 4 is located in the lower central part of the fuel tank 4.
6 is placed. The engine 46 is, for example, a side valve type single cylinder gasoline engine.
The cylinder section 6 is covered with a plate-shaped bracket (details will be described later) that serves as an engine cover. A generator 50 is provided on one side of the engine 46, that is, the right side in FIG.
is connected to the output shaft of the engine 46.

Engine 46 of generator 50 as shown in FIG.
A centrifugal fan (not shown) is provided on the side and functions to cool the coil and iron core of the generator 50. Right side plate 2 inside the cover 50g of the generator 50
Electrical components such as a voltage regulator and a rectifier (not shown) are housed in the part facing 4, and the cylindrical cover 5
A gasket 50h is fixed to the outer surface of the cover 50g, and the gasket 50h is in close contact with the right side plate 24 to guide the air sucked in by the centrifugal fan from the louver 24a (FIGS. 2 and 3) into the cover 50g. It's becoming like that.

A fan cover 52 is provided on the other side of the engine 46, that is, on the left side in FIG. 3, and a centrifugal fan (cooling fan) is housed in the fan cover 52. Further to the left of the fan cover 52, a recoil starter 56 having a leg portion 56e for forming a gap 52c for introducing a carburetor 54 and cooling air is arranged.

The fuel tank 4 shown in FIG. 3 is provided with an air breather 4a, and vinyl tubes 4c are fitted into the air breathers 4a through connection pipes 4b having a narrow inner diameter of, for example, about 2 mm.
The vinyl tubes 4c are arranged side by side inside the handle 6, and their ends are open to the atmosphere.

In FIG. 4, seen from above with the fuel tank 4 and handle 6 removed from the case-housed engine generator in the assembled state, the generator 50 and the fuel tank 4 are shown.
A muffler 58 is arranged in a space on the rear plate 22 side between the two.

An exhaust pipe 59 is connected to the muffler 58, and an exhaust port 60 of the muffler 58 is provided on the right side. The silencer 58 is attached to the upper cover 6 as shown in FIG. 4c.
2. It is covered with a lower cover 64 and a side cover 66. The upper cover 62 also covers the upper part of the engine 46, and has an opening 62a and a plug hole 62b formed therein. A spark prevention tube 60a made of wire mesh is attached to the exhaust port 60 of the muffler 58 to prevent discharge of sparks.

As shown in FIG. 3, the upper cover 62 has a gap 63 between it and the fuel tank 4, and an opening 62a.
A part of the cooling air generated by the centrifugal fan 52a flowing out from the fuel tank 4 is caused to flow into the gap 63 and the silencer 58
This prevents the heat from reaching high temperatures. Gap 63
The cooling air from the centrifugal fan in the fan cover 52 and the cooling air from the centrifugal fan of the generator 50 are exhausted from the louver 24a on the rear panel 22 to the outside. It is beginning to be excreted.

In the space surrounded by the generator 50, silencer 58, and fuel tank 4, there are an AC outlet, a voltmeter, a DC outlet, a breaker, a pilot lamp, an oil warning lamp, etc. (all not shown) attached to the front panel 14. It is accommodated. Further, the front panel 14 is formed with a Hertz switching window, an inverted L-shaped groove, and an opening (none of which are shown). A knob for engine operation is provided in the inverted L-shaped groove, and the engine is operated by operating the knob.

As shown in FIG. 4, the carburetor 54 is connected to an intake pipe 68 bent in a substantially U-shape.
An air cleaner 70 is attached to the. A rod 54c is connected to a throttle valve lever 54a of the carburetor 54 via a tension spring 54b, and the rod 54c is connected to a governor lever 72. Chewing valve lever 54d of carburetor 54
A chiyoke lever 54e is connected to the chiyoke lever 54e, and the tip of the chiyoke lever 54e is exposed from the front plate 12.

As shown in FIGS. 4c and 7, these intake devices are connected to the carburetor 5 through a gasket 68b and an insulator 68c to the flange 68a of the intake pipe 68.
4 and the air cleaner 70 between the carburetor support plate 70
a, It is fixed with a through bolt 70b via a packing 68b. Resin container-shaped air cleaner 7
0 (air cleaner main body) has one end open, and this open end face faces the front side of the case 2 (Fig. 2), and the other end face, that is, the left end face in Fig. 5, opens the carburetor 5.
It is connected to 4. As shown in FIG. 5, a center bolt 70c is screwed into a through bolt 70b protruding into the air cleaner 70.
A bolt 70g that fixes the perforated plate 70d, the air cleaner element 70e, and the air cleaner cover 16 is screwed into the tip of 0c (Fig. 4a).
reference). The air cleaner cover 16 is located in the opening 14i of the front panel 14, and the air cleaner 70
The intake hole 70h opens inward.

As shown in FIGS. 3 and 4, the fan cover 5
A urethane seal 74 (dividing member) is provided around 2. Urethane seal 74 is case 2
As shown in FIG.
is fixed to. Therefore, urethane seal 7
Almost no air from the engine 46 and muffler 58 side, which is at a high temperature, flows into the space on the intake device side divided by 4. Note that the passage portion of the tension spring 54b is separated by a gap between urethane seals 74 (FIG. 4).

As shown in FIG. 6, a governor mechanism 76 is provided on the rear surface of the engine 46. The governor mechanism 76 includes a governor gear 76a, a link 76b, a thruster 76c, a governor shaft 76d, etc.
The movement of the governor weight 76e of the governor gear 76a by the centrifugal force is controlled by the link 76b and the thruster 7.
6c functions to convert the rotation of the governor shaft 76d. The governor shaft 76d projects toward the rear side of the engine 46. Note that 46a is a side cover of the crankcase, and 46b is a camshaft.

The engine control section will be described with reference to FIG. 4a and FIG. 6, which are views of the engine 46 from diagonally above the rear side. The governor shaft 76d is a governor lever 72.
is fixed to the rotation center 72a of the governor lever 7.
The lower end of 2 is connected to a regulator 72c by a tension spring 72b. Regulator 72
c is rotatably attached to the engine 46 with a bolt 72d. One end of the connection wire 72e is connected to the regulator 72c, and the connection wire 72e
passes below the engine 46 and extends to the front side of the engine 46. A bracket 78, a control lever 80, a control shift lever 82, etc. are attached to the front side of the engine 46. The control lever 80 is rotatably attached to the bracket 78 with a mounting bolt 80a, and the wire connection portion 80 of the control lever 80
The other end of the connection wire 72e is connected to b. A locking portion 80c is formed on the control lever 80, and a locking portion 78a of the bracket 78 is formed.
A tension spring 80 is provided between the locking portion 80c and the locking portion 80c.
d is crossed. The tension spring 80d is disposed on the right side of the mounting bolt 80a in the assembled state shown in FIG. 3, and biases the control lever 80 in a direction to rotate the control lever 80 to the right about the mounting bolt 80a.

The bracket 78 is formed with a limit switch mounting plate 78b and a sub-bracket 78c. A protrusion 82a of a control shift lever 82 is slidably attached to a long hole 80e of the control lever 80. A stepped portion 82b is formed at the lower part of the control shift lever 82, and a protrusion 82c is also provided at the upper front surface. Protrusion 82
c fits into the inverted L-shaped groove of the front panel,
The knob for operating the engine is fixed to the protrusion 82c protruding from the front surface.

Further, as shown in FIG.
4a are connected. The fuel tank 84 is provided with a fuel filter 84b.
4 is a pipe 84 through which fuel flows from the fuel tank 4.
c and pipe 84d are connected. Further, a Hertz switching bolt 86 is attached to a sub-bracket 78c of the bracket 78 so that its position can be adjusted by a nut 86a.
The control lever 80 has a function of regulating the end position of the control lever 80, which is rotated to the right by the tension spring 80d. bracket 78
A limit switch 78d is attached to the limit switch attachment plate 78b. The limit switch 78d has the function of opening and closing the ignition circuit of an igniter (not shown).

Next, the operation will be explained. During operation, the intake air that flows into the intake hole 70h shown in Fig. 5 enters from the space on the low temperature side separated by the urethane seal 74 (Figs. 2, 3, and 4), so the intake air of the engine is always kept at a low temperature. Therefore, no dust is sucked in through the intake hole 70h, and the intake noise does not reach the outside and is quiet. Further, since the cooling air sucked in by the centrifugal fan 52a also flows in from the space on the low temperature side separated by the urethane seal 74, the cooling efficiency is good at low temperature. Furthermore, since the cooling air of the generator 50 sucked in by the centrifugal fan is also sealed by the gasket 50h (Fig. 3),
External low-temperature air directly flows in from the louver 24a, and the cooling efficiency is similarly good.

When inspecting the air cleaner 70, the bolt is 70g.
Turn to remove the cover 16, and inspect and clean the internal element 70e. At this time, since the cover 16 is provided on the front panel 14, the operator can inspect the air cleaner 70 on the front panel 14.
It is possible to work while facing the machine, and the operator does not need to move.

(Effects of the Invention) As explained above, according to the present invention, the engine 46 is arranged in the center of the case, the muffler 58 is arranged on one side of the engine 46, and the cooling fan is arranged on the other side of the engine. Urethane seal 74 provided on the outer periphery of the fan cover 52 that covers the cooling fan
Since the air cleaner 70 is placed in the space on the low temperature side divided by the (partitioning member), and the intake hole 70h of the air cleaner 70 is opened toward the inside of the case,
The air flowing into the intake hole 70h is passed through a high-temperature silencer 58.
It flows from the low temperature side space partitioned by the urethane seal 74 from the side, making it possible to increase the output of the engine 46.

In particular, in the present invention, the air cleaner 70 (main body) has a substantially container shape with an open front side of the case, and the element 70e housed in the air cleaner 70.
and a removable cover 16 that covers the air cleaner 70 so as to press the element 70e from the front side of the case, and the air intake hole 70h of the air cleaner 70 is formed to open toward the inside of the case. Since the opposite end of the case 2 is formed to communicate with the carburetor 54 (intake device) of the engine 46, the intake noise is less likely to reach the operator who is in the front of the case 2, and the intake noise can be reduced. Further, dust is less likely to be sucked into the intake hole 70h, and the element 70e is prevented from becoming dirty, thereby extending the inspection period of the air cleaner 70.

Furthermore, since the cover 16 of the air cleaner 70 can be placed on the front of the case 2,
The air cleaner 70 can be easily inspected and cleaned from the front side.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a case-housed engine generator to which the present invention is applied, Fig. 2 is an exploded perspective view of the case, and Fig. 3 is a front view of the case-housed engine generator with the front plate removed. Figure 4 is a plan view (top view) with the fuel tank removed from the case-housed engine generator, Figure 4a is an exploded perspective view of the silencer,
Fig. 4c is an exploded perspective view of the carburetor, Fig. 5 is a sectional view along V-V in Fig. 3, Fig. 6 is an exploded perspective view showing the governor mechanism, and Fig. 7 is an exploded perspective view of the engine control section. be. 2...Case, 4...Fuel tank, 6...
...Handle, 12...Front plate, 14...Front panel, 16...Air cleaner cover, 18...Starter handle, 20...Lubricating oil filler port, 46...
...engine, 52a... centrifugal fan, 50... generator, 58... silencer, 54... carburetor, 56...
...Recoil starter, 70...Air cleaner,
70d...Perforated plate, 70e...Element, 70
g...Bolt, 70h...Intake hole, 74...Urethane seal.

Claims (1)

[Claims] 1. In a case-housed engine generator, in which an air-cooled engine, a generator, and auxiliary equipment are housed in a case with an approximately rectangular parallelepiped exterior, the air-cooled engine is placed in the center of the case, and a silencer is placed on one side of the engine. , a cooling fan is placed on the other side of the engine, an air cleaner is placed in a space on the low temperature side separated by a partitioning member provided on the outer periphery of a fan cover that covers the cooling fan, and this air cleaner is opened on the front side of the case. It consists of a container-shaped air cleaner body, an element housed in the body, and a removable cover that covers the air cleaner body so as to press the element from the front side of the case. What is claimed is: 1. A case-housed engine generator, characterized in that the air cleaner body is formed so as to open toward the direction thereof, and the opposite end of the air cleaner body is formed so as to communicate with an intake device of the engine.