JPH017919Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an improvement in an engine mounting device for fixing an engine of a case-housed engine generator to a case, for example.

(Prior Art) There is a technology (Japanese Utility Model Publication No. 58-27135) in which a small general-purpose engine is mounted on a bottom plate using a mounting device in which a vibration-proof rubber is interposed between two mounting fittings.

However, in the conventional example described above, the mounting device cannot be positioned on the bottom plate, and there is a risk that the mounting device may be fixed at a position deviated from a predetermined position. If the mounting device is fixed in an uneven manner, there is a problem in that a preload acts on the vibration isolating rubber of the mounting device, shortening the life of the vibration isolating rubber.

(Object of the invention) The object of the invention is to provide an engine mounting device that can be positioned at a predetermined position on the bottom plate and fixed in a normal state.

(Structure of the invention) The present invention is an engine mounting device for fixing an engine on a bottom plate, in which a positioning hole that fits into a positioning protrusion on the bottom plate is formed in a substantially horizontal piece of the bottom plate fixed to the bottom plate. , a mounting hole for the engine is formed in one part of the upper plate, an elastic body is provided between the inclined pieces of the upper plate and the lower plate, and the relative position with respect to the bottom plate is determined by the positioning hole in the lower plate. This is a unique engine mounting device.

(Example) In Fig. 1 showing a case-housed engine generator employing an engine mounting device according to the present invention, 2 is a case, and the case 2, which has an approximately rectangular external shape, contains an engine, a generator, etc., which will be described later. Machinery is accommodated. The upper part of the fuel tank 4 is exposed on the upper surface of the case 2, and a handle 6 is provided above the fuel tank 4. fuel tank 4
An oil filler port 8 and an oil level gauge 10 are provided on the front side of the upper surface.

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 (positioning projection) for attaching the engine and generator, and the annular projection 32
A mounting leg 34 (engine mounting device) is positioned and fixed with a bolt 34a.
The mounting bolts 36 are tightened from the bottom side of the bottom plate 28. A tool mounting hole 38 is provided in the bottom plate 28, and a tool 40 is inserted into a cap 38b that is fitted into a protrusion 38a of the tool mounting hole 38.
The head 40a of the tool 40 is fitted, and the tool 40 is removably attached using a mounting rubber 42. Also, the bottom plate 28
Legs 44 are fixed to the bottom surface of.

The mounting leg 34 (engine mounting device) to which the present invention is applied will be explained with reference to FIGS. 2a to 2c. The mounting leg 34 is formed from an upper plate 35, a lower plate 37, and a vibration isolating rubber 39. The upper plate 35 is made by bending a steel plate by press working to form a horizontal piece 35a and an inclined piece 3.
5b is formed. A mounting hole 35c for the engine 46 is formed in the horizontal piece 35a, and a vertically bent protrusion 35d (see FIG. 2b) is provided at the right end of the horizontal piece 35a in FIG. 2a. . The protrusion 35d engages with the inner edge of a flange 47 formed at the bottom of the engine 46 (see FIG. 5). Similarly, the lower plate 37 has a horizontal piece 37.
a, an inclined piece 37b, and a horizontal piece 37a has a positioning hole 3 on the same center line as the mounting hole 35c;
7c is formed so that the engine can be easily installed from under the bottom plate. The positioning hole 37c is the mounting hole 35
It has a diameter larger than c and is adapted to fit into the annular protrusion 32 of the bottom plate 28 to position the mounting leg 34 at a predetermined position on the bottom plate 28. A flange 37d is formed on the horizontal piece 37a as shown in FIG. 2c, and a bolt 3 is inserted into the mounting hole 37e of the flange 37d.
4a (Fig. 2) and attach the mounting legs 34 to the bottom plate 28.
It is fixed at Both inclined piece parts 35b and 37b are inclined parallel to each other, and both inclined piece parts 35a and 3
A vibration isolating rubber 39 is fixed to 7b by baking.

The mounting legs 34 shown in FIG. 5 are arranged at four locations on the bottom plate 28 (FIG. 2) so that the center of gravity of the engine and generator is located below the intersection of the extension lines of the center lines of the vibration isolating rubber 39. .

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. Arranged further to the left of the fan cover 52 is a carburetor 54 and an 11 recoil starter 56 having leg portions 56e for forming a gap 52c for introducing cooling air.

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. A wire mesh spark prevention tube (not shown) is attached to the exhaust port 60 of the muffler 58 to prevent sparks from being discharged.

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 portion of the cooling air generated by the centrifugal fan 52a flowing out from the fuel tank 4 flows into the gap 63, and the fuel tank 4
This prevents the heat from reaching high temperatures. Gap 63
The cooling air from the centrifugal fan 52a and the centrifugal fan 50b of the generator 50 are exhausted from the louver 22a of the rear plate 22 to the outside. It's getting old.

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.

These intake devices include a gasket and an insulator on the flange of the intake pipe 68, and a through bolt 70b between the carburetor 54 and the air cleaner 70 via a carburetor support plate and gasket as shown in FIG.
The penetrating bolt 70b protruding into the air cleaner 70 has a center bolt 70c.
are screwed together, and the tip of the center bolt 70c has a perforated plate 70d, an air cleaner element 70e,
Bolts 70 fixing the air cleaner cover 16
g are screwed together. The air cleaner cover 16 is located in the opening of the front panel 14, and the air intake hole 70h of the air cleaner 70 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 FIGS. 6 and 7, the engine 46
A governor mechanism 76 is provided on the rear surface.
The governor mechanism 76 includes a governor gear 76a, a link 76b, a thruster 76c, a governor shaft 76d,
The movement of the governor weight 76e of the governor gear 76a by the centrifugal force is controlled by the link 76b, etc.
The thruster 76c functions to convert 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. 6, which shows the engine 46 viewed diagonally from above on the rear side. The governor shaft 76d is the rotation center 7 of the governor lever 72.
2a, and the lower end of the governor lever 72 is connected to a regulator 72c by a tension spring 72b. The regulator 72c is rotatably attached to the engine 46 with a bolt 72d. One end of a connection wire 72e is connected to the regulator 72c, and the connection wire 72e is connected to the engine 4.
6 and extends to the front side of the engine 46. There is a bracket 7 on the front side of the engine 46.
8, a control lever 80, a control shift lever 82, etc. are attached. The control lever 80 is rotatably attached to the bracket 78 with a mounting bolt 80a, and the other end of the connecting wire 72e is connected to the wire connecting portion 80b of the control lever 80. A locking portion 80c is formed on the control lever 80, and a locking portion 78a of the bracket 78 and a locking portion 80 are formed on the control lever 80.
A tension spring 80d is stretched between the spring 80c and the spring 80d. 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 of the case-housed engine generator as described above, vibrations caused by the rotation of the engine 46 are absorbed by the vibration isolating rubber 39 of the mounting legs 34. When installing the engine 46, use the mounting leg 3.
Fit the positioning hole 37c of No. 4 into the annular projection 32 and fix the mounting leg 34 to the bottom plate 28 with the bolt 34a.
5d from below the bottom plate 28.
The engine 46 is secured with a bolt 36 (FIG. 2) through the inner opening of the engine 46.

Mounting hole 35c of engine 46 and positioning hole 3
7c is provided on the center side of the engine 46 of the vibration isolating rubber 39, so when the engine 46 is fixed to the bottom plate 28, the horizontal pieces 35a and 37a are provided on the engine 46 center side.
6, the space required for installing the engine 46 is small.

(Effect of the invention) As explained above, according to the invention, the bottom plate 28
A positioning hole 37c that fits into the annular projection 32 (positioning projection) of the bottom plate 28 is formed in the substantially horizontal piece 37a of the lower plate 37 of the mounting leg 34 to be fixed to the mounting leg 34, and a mounting hole 35c for the engine 46 is formed in the upper plate 35. form,
Slanted pieces 35b, 37 of the upper plate 35 and lower plate 37
A vibration isolating rubber 39 is provided between b and the positioning hole 37c of the lower plate 37 determines the relative position to the bottom plate 28. Therefore, when installing the engine 46, the positioning hole 37c is fitted into the annular protrusion 32. The mounting leg 34 can be placed in a predetermined position by a simple operation of fixing the leg 34 to the bottom plate 28. Therefore, the vibration isolating rubber 39 does not twist due to misalignment of the mounting position as in the conventional case, and there is no possibility of preload being applied due to torsion, and the life of the vibration isolating rubber 39 can be extended.

In particular, in the present invention, as shown in FIG. 2a, the mounting hole 35c of the upper plate 35 and the positioning hole 37c of the lower plate 37 are arranged on the same center line, and the positioning hole 37c has a larger diameter than the mounting hole 35c. Because of this, the work of fixing the engine to the mounting hole 35c can be easily performed from below the bottom plate 28 through the positioning hole 37c.

(Another Embodiment) The vibration isolating rubber 39 is not limited to being fixed to both inclined pieces 35b and 37b, and may be fixed by other means such as bolting.

[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, Fig. 2a is a vertical cross-sectional view of the mounting leg, and Fig. 2b is Fig. 2 Fig. 2c is a view taken from arrow c in Fig. 2a, Fig. 3 is a front view of a case-housed engine generator with the front plate removed, and Fig. 4 is a view taken from case-housed engine generator. Figure 5 is a cross-sectional view of Figure 3, Figure 6 is an exploded perspective view showing the engine control section, Figure 7 is an exploded view of the governor mechanism. FIG. 2... Case, 4... Fuel tank, 6... Handle, 12... Front plate, 14... Front panel, 4
6... Engine, 58... Silencer, 50... Generator, 52... Fan cover, 54... Carburetor, 5
6... Recoil starter, 74... Urethane seal, 32... Annular projection, 34... Mounting leg, 35...
...Top plate, 37...Lower plate, 35a, 37a...Horizontal piece, 35b, 37b...Slanted piece, 35c...
Mounting hole, 37c... Positioning hole, 39... Anti-vibration rubber.

Claims (1)

[Scope of utility model registration request] An engine mounting device for fixing an engine on a bottom plate, in which a positioning hole that fits into a positioning protrusion on the bottom plate is formed in a substantially horizontal piece of the bottom plate fixed to the bottom plate, and a positioning hole that fits into a positioning protrusion on the bottom plate is formed in a part of the top plate. A mounting hole is formed, an elastic body is provided between the inclined pieces of the upper plate and the lower plate, the mounting hole of the upper plate and the positioning hole of the lower plate are arranged on the same center line, and the positioning hole is larger than the mounting hole. An engine mounting device characterized in that the engine mounting device is formed to have a diameter, and the relative position with respect to the bottom plate is determined by a positioning hole in the bottom plate.