JP2002309959A - Engine control switch of engine generator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out a starting operation of an engine generator in a one- touch manner by a switch provided on a control panel. SOLUTION: The control switch 95 is arranged on the control panel 7. The control switch 95 carries out opening/closing of a fuel cock, opening/closing of a choke, and on/off of electric power supply to an ignition device in a cooperative manner. The control switch 95 is also provided with a switch shaft 97 which opens/closes the fuel cock 100 in conjunction with a control dial 96. A choke lever 106 connected to a chock wire 107 is attached to the switch shaft 97. The switch shaft is provided with a cutout for operating the lever by abutting on or separating from the choke lever 106, and choke opening/ closing operation is carried out in conjunction with an operation of the switch shaft 97. Further, the switch shaft 97, formed is a cam crest which carries out ON/ OFF operation of a stop switch 99 controlling supply of the electric power to the ignition device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an engine control switch for an engine generator, and more particularly, to a control switch capable of opening and closing a fuel cock and a choke and starting / stopping an engine with a single switch.

[0002]

2. Description of the Related Art In an engine generator which obtains electric power by driving an electric generator by an engine, a control panel provided with various switches for control and output terminals for power supply is provided on a front face of the apparatus. I have. For example, JP 2001-1
Japanese Patent No. 5937 discloses a control panel for an engine generator, in which an engine switch for starting and stopping the engine, an output terminal of an AC power supply, and the like are provided on the panel surface. In this case, the engine switch
The power supply to the ignition coil of the engine is controlled, and an ignition voltage to the ignition coil is generated only when the engine is ON.

In such an engine generator, when starting the apparatus, first open the fuel cock, then close the choke, then turn on the engine switch and pull the recoil knob to start the engine. Then, when the engine is in a warm-up state, the choke is opened to shift to a normal operation state. When the apparatus is stopped, the engine switch is turned off and the fuel cock is closed. As a result, both the power supply to the spark plug and the fuel supply to the engine are cut off, and the engine stops.

[0004]

However, in such an engine generator, it is necessary to open and close a fuel cock and a choke in addition to an operation on a control panel when starting the apparatus. Therefore, it is necessary to operate a plurality of portions of the apparatus at the time of starting, and there is a problem that the starting operation is complicated.

[0005] It is an object of the present invention to enable an engine generator to be started by a single switch provided on a control panel.

[0006]

The engine control switch of the engine generator according to the present invention is installed on the control panel of the engine generator and has three switch positions: an engine stop position, an engine operation position, and a choke position. An engine control switch, comprising: a switch operation unit disposed on a control panel surface for switching and displaying the switch position; and a cock operation unit interlocked with the switch operation unit to open and close a fuel cock of the engine. A switch shaft that is connected to the engine stop position and opens the fuel cock in the engine operation position and the choke position, and is mounted on the switch shaft, and is connected to the engine choke to connect the switch. Opening and closing the choke based on shaft movement A choke operating portion configured to open the choke in the engine stop position and the engine operating position and close the choke in the choke position, and a stop formed on the switch shaft to control power supply to an ignition device of the engine. Switch O
N / OFF is performed, and a cam switch unit for shutting off power supply to an ignition coil at the engine stop position and performing power supply to the ignition coil at the engine operation position and the choke position is provided.

In the engine control switch, a choke lever connected to the choke via a wire is provided in the choke operating portion, and the choke lever is provided on the switch shaft at the engine stop position and the engine operation position. May be maintained at a choke open position, and an engaging operation portion that contacts the choke lever and moves the choke lever to a choke closed position at the choke position may be formed.

According to the present invention, a choke operating portion for opening and closing a choke based on the operation of the switch shaft is attached to a switch shaft for opening and closing the fuel cock in conjunction with the switch operating portion, and a stop switch is turned on / off. OFF
Is formed on the switch shaft, the opening / closing of the fuel cock, the opening / closing of the choke, and the presence / absence of power supply to the ignition device can be performed with a single switch and in conjunction with each other. That is, the apparatus can be started and stopped only by operating the switch on the control panel, and there is no need to separately open and close the fuel cock and choke. Therefore, operations at the time of starting and stopping are simplified, and handling of the engine generator is facilitated.

[0009]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a front view of an engine generator to which a control switch according to an embodiment of the present invention is applied, FIG. 2 is a plan view of the engine generator of FIG. 1, and FIG. 3 is a rear view thereof.

The engine generator 1 according to the present embodiment is
As shown in FIGS. 1 to 3, a power generation unit 5 in which an engine 3 as a drive source and a power generator 4 are integrated on a support frame 2 formed by bending a pipe into a rectangular frame shape is provided with a plurality of support pieces 6. Elastically supported. The engine generator 1 employs an inverter system as a control system, and an inverter unit 11 for generating voltage control is attached to the side of the power generation unit 5 (on the rear side in FIG. 3) (see FIG. 1). .

Above the power generation unit 5, a fuel tank 9 for storing fuel supplied to the engine 3 is provided. A fuel supply port is provided substantially at the center of the upper surface of the fuel tank 9, and a fuel cap 10 is attached to the fuel supply port 9 so that it can be opened and closed.

As shown in FIG. 1, a control panel 7 is provided at the front of the apparatus. The control panel 7 is provided with switches such as an engine switch and an auto throttle switch, and output terminals such as an AC power terminal and a DC power terminal. A recoil knob 8a for driving a recoil starter 8 (see FIG. 8) is provided below the control panel 7, and the engine 3 is started by pulling the same.

The control panel 7 is provided with an engine control switch (hereinafter abbreviated as a switch) 95 for opening and closing the fuel cock and choke of the engine 3 and for starting and stopping the engine with one touch. I have. FIG. 9 is a front view of the switch 95. In the present embodiment, the switch 95 is a rotary dial switch. The switch position is switched by grasping and rotating a control dial (switch operation unit, hereinafter abbreviated as a dial) 96 by hand. Further, the dial 96 is provided with a position display 96a, and the switch position at that time is displayed.

In this embodiment, the switch 95 is set in three positions: "engine stop", "engine operation", and "choke". At the “engine stop position”, the fuel cock is closed and the power supply to the ignition coil (ignition device, see FIG. 5) 37 is cut off. In the “engine operating position”, the fuel cock is opened and the ignition coil 3
7 is supplied. Further, in the “choke position”, the choke is closed in addition to the state of the “engine operation position”, and a rich air-fuel mixture is supplied to the engine 3.

FIG. 10 is a sectional view showing the internal structure of such a switch 95, FIG. 11 is an explanatory view showing the operation of the switch 95, (a) is an engine stop position, (b) is an engine operating position, (C) shows the state at the choke position. The switch 95 is mounted on the control panel 7 as shown in FIG. 10, and a switch shaft 97 is provided coaxially with the dial 96 on the back side.
Below the switch shaft 97, a stop switch 99 supported by a bracket 98 on the control panel 7 is provided.
Is provided. As shown in FIG. 11, the stop switch 99 is a micro switch having a switch piece 99a. When the switch piece 99a is pushed down, the stop switch 99 is turned on, and the power supply to the ignition coil 37 is cut off.

On the other hand, the switch shaft 97 has the structure shown in FIG.
As shown in (a), a cam ridge (cam switch portion) 97a is formed, and the dial 96 is set at the "engine stop position".
, The cam peak 97a is set so that the switch piece 99a is pushed down. In addition, "engine stop position"
In other positions, the cam peak 97a is separated from the switch piece 99a, and the stop switch 99 is turned off. That is, when the dial 96 is at the “engine stop position”, power supply to the ignition coil 37 is cut off, and power supply is performed at other positions.

A cock connecting shaft 101 for opening and closing the fuel cock 100 is attached to an end (right end in FIG. 10) of the switch shaft 97. The fuel cock 100 is supported by a bracket 103 on a control box 102 provided behind the control panel 7. A fuel pipe 104 connected to the fuel tank 9 is attached to the fuel cock 100. Although not shown, the fuel cock 100 is also provided with a fuel pipe connected to the engine 3.

The cock connecting shaft 101 is connected to the fuel cock 100.
Fitting piece 105 of cock opening / closing shaft (cock operating unit) 105
a, and operates integrally with the cock opening / closing shaft 105. Also, the cock opening / closing shaft 105 is connected to a small diameter portion 97b formed at the right end of the switch shaft 97. Therefore, the cock opening / closing shaft 105 is connected to the switch shaft 9
7, the fuel cock 100 is closed when the dial 96 is at the "engine stop position". On the other hand, in the "engine operation position" and "choke position"
The fuel cock 100 is opened, and fuel is supplied from the fuel tank 9 to the engine 3.

The switch shaft 97 is further provided with a choke lever (choke operating section) 106. A choke wire 107 is provided at the tip of the choke lever 106.
Is attached, and the choke wire 107 is connected to a not-shown choke lever of the carburetor 12 (see FIG. 4). Further, the choke lever 106 is rotatably provided at a connection portion between the small diameter portion 97b of the switch shaft 97 and the cock connecting shaft 101. The part is cut out. As shown in FIG. 11, first and second end surfaces 108a, 108
8b are formed. Then, the opening and closing of the choke is controlled by the engagement relationship between the both end surfaces 108a and 108b and the choke lever 106 accompanying the dial operation. In the switch 95, the opening and closing of the fuel cock 100 and the ON / OFF of the stop switch 99 are simultaneously performed by dial operation.
F is also performed.

That is, as shown in FIG. 11A, when the dial 96 is at the "engine stop position", the first end face 108a contacts the right side of the choke lever 106. In this case, a return spring is attached to the choke lever of the carburetor 12. That is, the choke is normally open, and the choke lever 106 is pulled by the choke wire 107 and is in the state of FIG. 11A (choke open position).
In the "engine stop position", the first end surface 108a is in contact with the right side of the choke lever 106 in this state, so that the choke is kept open.

In this case, the fuel cock 1
00 is also closed. Further, as shown in FIG. 11A, the cam ridge 97a pushes down the switch piece 99a, the stop switch 99 is turned off, and the power supply to the ignition coil 37 is cut off.

Next, when the dial 96 is turned from the “engine stop position” to the “engine operation position”, the first end face 108 a is separated from the choke lever 106 with the rotation of the switch shaft 97. And the "engine operating position"
Is reached, as shown in FIG.
8 contacts the left side of the choke lever 106. At this time, the choke lever 106 is maintained at the “choke open position” by the aforementioned return spring.

On the other hand, in this case, the fuel cock 100 is opened, and fuel is supplied to the engine 3. FIG.
As shown in FIG. 1B, the cam peak 97a is separated from the switch piece 99a, the stop switch 99 is turned on, and power is supplied to the ignition coil 37. Therefore, operation of the engine 3 is enabled at this position.

Further, when the dial 96 is turned from the "engine operation position" to the "choke position", the second end face 1
08b pushes the left side of the choke lever 106, and FIG.
As shown in (c), the choke lever 106 is turned to the right against the urging force of the return spring. As a result, the choke lever 106 moves to the “choke closed position”, the choke wire 107 is pulled, and the choke is closed.

In this case, the fuel cock 100 is open, and the stop switch 99 is also ON.
Accordingly, when the start operation is performed by pulling the recoil knob 8a, a rich air-fuel mixture is supplied to the engine 3 in the choke closed state, and the engine 3 is started to start the power generation operation.

On the other hand, when the engine is warmed and the dial 96 is returned from the "choke position" to the "engine operation position", the notch 108 is returned to the state shown in FIG. At this time, the choke lever 106 is also rotated leftward by the urging force of the return spring and returns to the “choke open position”. As a result, the choke is opened, the amount of air supplied to the engine 3 increases, and the engine 3 is operated with a normal air-fuel mixture.

As described above, in the switch 95, the opening / closing of the fuel cock, the opening / closing of the choke, and the presence / absence of power supply to the ignition coil are performed by a single switch, and these are linked. That is, the apparatus can be started only by dial operation on the control panel 7, and there is no need to separately open and close the fuel cock and choke. Therefore, the operation at the time of starting is simplified, and handling of the engine generator becomes easy.

FIG. 4 is a front view of a power generation unit 5 used in the engine generator of FIG. 1, FIG. 5 is a plan view thereof, FIG. 6 is a right side view of FIG. FIG. 8 is a cross-sectional view taken along the line ZZ in FIG. 5.

The power generation unit 5 includes the engine 3 and the power generator 4
And the recoil starter 8. As shown in FIGS. 4 and 6, an inverter unit 11 for controlling a power generation output from the power generator 4 and converting the power into an alternating current having a predetermined frequency is attached to a side portion of the power generation unit 5. The inverter unit 11 has a configuration in which an electronic board is housed in an aluminum case 71 and is directly fixed to an aluminum fan cover 53.

The engine 3 is an air-cooled single-cylinder OHV gasoline engine, and includes a crankcase 31 and a cylinder 32 above the crankcase 31.
3 is attached. An ignition coil 37 integrated with a plug cap is attached to the cylinder 32. A carburetor 12 is provided on the intake side of the engine 3, and outside air is introduced into the carburetor 12 through an air cleaner 36, where a mixture with gasoline is produced and supplied to the engine 3. on the other hand,
A muffler 14 is connected to the exhaust side via an exhaust pipe 13. Exhaust from the engine 3 passes through the muffler 14 and is discharged from an exhaust port 15 provided on the left side of the apparatus in FIG.

The carburetor 12 is provided with a throttle valve 16 as shown in FIG. The throttle valve 16 is opened and closed by a cab throttle lever 17 provided above the carburetor 12. One end of a governor rod 18a is attached to the cab throttle lever 17, and the engine 3 is controlled by a mechanical governor so that the engine speed is constantly adjusted without being affected by load fluctuations.

That is, as shown in FIGS. 4 and 5, a governor shaft 19 is rotatably mounted on the crankcase 31, and a base end of a governor lever 20 is attached thereto. The governor lever 20 includes a tension coil spring 22 connected to a speed control lever 21.
The governor lever 20 is urged clockwise in FIG. 5 by the tension coil spring 22. One end of a governor rod 18 b is attached to the distal end of the governor lever 20, and the other end of the governor rod 18 b is connected to the control lever 23. The control lever 23 is connected to the power generation unit 5
Is rotatably supported by a plate 25 attached to the upper part of the. Further, the control lever 23 is provided with the other end of a governor rod 18 a having one end connected to the cab throttle lever 17. Therefore, when the governor lever 20 rotates about the governor shaft 19, the governor rod 18b, the control lever 23, and the governor rod 18a are interlocked, and the cab throttle lever 17 is operated.

In this case, the governor shaft 19 is engaged with a governor sleeve slidably mounted in the axial direction on a shaft that is driven to rotate by the crankshaft 34 of the engine 3. A rotating body is fixed to the shaft, and a plurality of governor arms are rotatably mounted on the end surface of the shaft at a predetermined radius from the center of rotation. And
Each governor arm is integrally provided with a governor weight, and these constitute a mechanical governor mechanism.

When the load on the engine 3 is reduced, the engine speed, that is, the crankshaft 3 is reduced by the reduced load.
The number of revolutions of 4 tries to increase temporarily. However, the centrifugal force applied to the governor weight decreases as the rotation speed decreases, and the governor arm closes, whereby the governor sleeve moves and the governor shaft 19 rotates to the low speed side. And
The governor lever 20 also rotates together with the governor shaft 19,
The movement is transmitted to the cab throttle lever 17 via the governor rod 18a and the like, and the throttle valve 16 is driven in the closing direction. Thus, the engine speed is reduced according to the load. On the other hand, when the engine load becomes high, the governor lever 20
Is turned in the opposite direction. Therefore, the engine speed is adjusted to be constant without being affected by the load fluctuation.

The engine 3 is provided with a crankshaft 34 incorporated in the crankcase 31 extending in the left-right direction in FIG. In the power generation unit 5, one end side of the crankshaft 34 is an output shaft of the engine 3, and a flywheel 51,
The cooling fan 52, the recoil starter 8, and the power generator 4 are arranged in this order. That is, the flywheel 51 and the cooling fan 52 are attached to the next position of the engine 3, and the adapter 5 fixed to the flywheel 51 is provided.
5, a recoil starter 8 and a power generator 4 are provided at the end thereof.

As shown in FIG. 8, one end 34a of the crankshaft 34 of the engine 3 is
1 and is supported by a bearing 35 mounted on the bearing 1.
The other end of the crankshaft 34 is also supported by a bearing (not shown) on the opposite side.
1 is freely rotatable. One end 34a protrudes out of the crankcase 31, and a flywheel 51 is attached. The flywheel 51 includes a boss 51a fixed to the crankshaft 34 via a key,
And a disk portion 51b extending in the radial direction from the boss portion 51a.

A cooling fan 52 is attached to the disk portion 51b. The cooling fan 52 is a disk unit 52
a and a number of fan blades 52b provided integrally on the surface of the disk portion 52a. Cooling fan 5
2 is covered by a fan cover 53 fixed to the engine 3. The fan cover 53 is made of aluminum, and has a number of slits 5 on the side surfaces serving as cooling air intakes.
4 are provided. The fan cover 53 also has a function as a duct for guiding air. As shown in FIG. 8, as the cooling fan 52 rotates, outside air is introduced into the fan cover 53 from the slit 54 and the cooling air Is sent to the engine 3 side and guided.

The recoil starter 8 is disposed next to the flywheel 51. The recoil ring 5 is attached to the boss 51 a of the flywheel 51 via an adapter 55.
6, a recoil holder 57 in which the disk portion 57a and the cylindrical portion 57b are integrated is provided at the next position. A recoil pulley 59 around which a recoil rope 58 is wound is rotatably mounted outside the cylindrical portion 57b.

The recoil pulley 59 is provided with an engaging claw (not shown). When the recoil knob 8 a is pulled and the recoil pulley 59 is rotated by the recoil rope 58, the engaging claw is engaged with the recoil ring 56. Accordingly, the crankshaft 34 connected via the adapter 55 rotates, and the engine 3 is started. The recoil holder 57 is provided with a rewind spring (not shown), and the recoil rope 58 is rewound onto the recoil pulley 59 by a spring force.

The power generator 4 is arranged next to the recoil starter 8. In the engine generator 1, the power generator 4
Is an inner rotor type, and is composed of an inner rotor 41 and a stator 42. Inner rotor 41
Is composed of a rotor shaft 43 and a rotor disk 45, and the rotor shaft 43 is fixed to the tip of the boss 55 a of the adapter 55 by a through bolt 60. In this case, a tapered portion 55b is formed in the boss portion 55a, and the tapered portion 55b is
Is fitted to the tapered hole 43a provided in the first hole. On the other hand, the other end of the rotor shaft 43 is rotatably supported by a bearing 61 attached to the power generator rear cover 44. A stator 42 is provided outside the inner rotor 41. In this case, the stator 42 is attached so as to be sandwiched between a fan cover 53 and a power generator rear cover 44.

A plurality of magnets (not shown) are mounted on the outer peripheral surface of the inner rotor 41 along the circumferential direction. On the other hand, the stator 42 is provided with a core 62 formed by laminating a number of steel plates, and a coil 63 is wound therearound. And the crankshaft 34
As the magnet of the inner rotor 41 rotates inside the coil 63 with the rotation of, an electromotive force is generated in the coil 63 to generate power.

The power generator rear cover 44 has a disk portion 44a in which a ventilation hole 64 is formed and a cylindrical portion 44b integrated with the disk portion 44a. The power generator rear cover 44 is fixed to the fan cover 53 at the cylindrical portion 44 b, and at this time, the stator 42 is held between the power cover and the fan cover 53. Then, as shown in FIG. 8, with the rotation of the cooling fan 52, outside air is introduced into the power generator rear cover 44 from the ventilation holes 64, and flows toward the engine 3 while cooling the stator 42 and the like.

On the other hand, outside air flows into the power generation unit 5 from a slit 54 formed on the side of the fan cover 53. This airflow is joined with the cooling air introduced from the ventilation holes 64 and cooling the stator 42 and the like, guided by the fan cover 53 and blown around the engine 3.
That is, the cooling fan 52 generates two types of cooling air, the slit 54 and the ventilation hole 64, thereby cooling both the power generator 4 and the engine 3. Then, the cooling air blown to the engine 3 goes behind the engine 3 to cool the muffler 14.

The present invention is not limited to the above embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

For example, in the above-described switch 95, the switch position is switched by turning the dial 96. Instead of the dial, a lever that reciprocates in a linear direction may be provided, and the switch may be switched by operating the lever. .

[0047]

According to the present invention, the switch shaft for opening and closing the fuel cock in conjunction with the switch operation unit is provided with the choke operation unit for opening and closing the choke based on the operation of the switch shaft, and the stop switch is turned on. / OFF
Is formed on the switch shaft, the opening / closing of the fuel cock, the opening / closing of the choke, and the presence / absence of power supply to the ignition device can be performed with a single switch and in conjunction with each other. That is, the device can be started only by operating the switch on the control panel, and there is no need to separately open and close the fuel cock and choke. Therefore, the operation at the time of starting is simplified, and handling of the engine generator becomes easy.

[Brief description of the drawings]

FIG. 1 is a front view of an engine generator to which a control switch according to an embodiment of the present invention is applied.

FIG. 2 is a plan view of the engine generator of FIG. 1;

FIG. 3 is a rear view of the engine generator shown in FIG. 1;

FIG. 4 is a front view of a power generation unit used in the engine generator of FIG.

FIG. 5 is a plan view of the power generation unit of FIG.

6 is a right side view of FIG. 5 (in the X direction shown by an arrow).

FIG. 7 is a left side view of FIG. 4 (Y direction indicated by an arrow).

FIG. 8 is a sectional view taken along the line ZZ in FIG. 5;

FIG. 9 is a front view of a control switch.

FIG. 10 is a sectional view showing the internal structure of the control switch.

11A and 11B are explanatory diagrams showing the operation of the control switch, wherein FIG. 11A shows a state at an engine stop position, FIG. 11B shows a state at an engine operation position, and FIG. 11C shows a state at a choke position.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine generator 3 Engine 7 Control panel 37 Ignition coil (ignition device) 95 Engine control switch 96 Control dial (Switch operation part) 97 Switch shaft 97a Cam peak (Cam switch part) 99 Stop switch 100 Fuel cock 105 Cock opening / closing shaft ( Cock operating part) 106 Choke lever (Choke operating part) 108 Notch (engagement operating part)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) F02N 15/00 F02N 15/00 DF Term (Reference) 3G006 AC00 AD01 BA01 3G065 BA02 CA22 EA01 JA14 JA15 KA05 KA15 KA22 KA32

Claims (2)

[Claims] 1. An engine control switch installed on a control panel of an engine generator and having three switch positions of an engine stop position, an engine operation position, and a choke position, the engine control switch being disposed on a control panel surface, A switch operation unit that switches and displays the switch position, and a cock operation unit that opens and closes a fuel cock of the engine in conjunction with the switch operation unit, and closes the fuel cock at the engine stop position, A switch shaft for opening the fuel cock in an engine operating position and the choke position, and a switch shaft mounted on the switch shaft, connected to a choke of the engine to open and close the choke based on an operation of the switch shaft, and the engine stop position. And the choke in the engine operating position And a choke operating part for closing the choke at the choke position; and ON / O of a stop switch formed on the switch shaft for controlling power supply to an ignition device of the engine.
An engine generator that performs FF, interrupts power supply to an ignition coil at the engine stop position, and performs power supply to the ignition coil at the engine operation position and the choke position. Engine control switch. 2. The engine control switch according to claim 1, wherein the choke operating section has a choke lever connected to the choke via a wire, and the switch shaft has the engine stop position and the engine operation. In the position of the engine generator, the choke lever is maintained at the choke open position at the position, and the choke position is provided with an engagement operating portion that abuts on the choke lever to move the choke lever to the choke closed position. Engine control switch.