JP3903700B2 - Engine switch mounting structure for general-purpose engines - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an engine switch mounting structure for a general-purpose engine used as a prime mover such as a portable generator.
[0002]
[Prior art]
The general-purpose engine is provided with an engine switch for turning on / off (ON / OFF) an ignition coil circuit of the engine, and the operation / stop of the engine is controlled by operating the engine switch.
[0003]
In general, as shown in FIG. 9, the engine switch is provided with a mounting seat C on a fan cover B or the like connected to the crankshaft end side surface of the crankcase A, and the engine switch D is attached to the mounting seat C. Is adopted. In addition, there is a type that employs a method in which an engine switch (main switch) is installed on a stay substrate after being installed in a fuel tank (see Japanese Patent Application Laid-Open No. 9-280071).
[0004]
[Problem to be Solved by the Invention]
However, if the engine switch is separated from other throttle levers, recoil starter starter levers, fuel cock levers, or choke levers as in the prior art, there is a problem that the operation of each part becomes troublesome. Arise.
[0005]
Also, the distance between the ignition switch and the ignition coil is longer, and the lead wires that connect them are also longer. This makes it troublesome to handle the lead wires and fix the lead wires with brackets on the bolts, which makes the assembly work cumbersome. Was a workload.
[0006]
The present invention has been made in view of the above-described problems. Since the engine switch can be arranged near other operation parts, the operation of each part is convenient and the wiring length between the ignition coil and the engine switch is improved. The purpose of the present invention is to provide an engine switch mounting structure for a general-purpose engine that can be reduced in length, facilitates assembly work, reduces work load, and reduces costs.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has the following configuration.
That is, in the present invention, the engine cylinder portion is provided to protrude forward from the crankcase while the engine is installed, and a starter lever, a cooling fan, and a fan cover are provided on one end side of the crankshaft of the engine. In a general-purpose engine in which an air cleaner is mounted in front of the starter lever and above the carburetor, an under cover that covers the outside of the carburetor from the side surface side is connected to the lower side of the air cleaner, and the under cover is connected to the crankshaft. A window hole provided with an insertion opening at the crankshaft side end of the undercover extending in a plate shape, and the insertion opening is wider than the window hole. are narrower, crowded difference engine switch window hole through the insertion opening attachment Rutotomoni, this engine switch, the fan An engine switch attachment structure of a general-purpose engine, characterized in that so as to connect the lead wire from the ignition coil mounted to the cylinder portion through the notched hole of the fan cover in the bar.
[0008]
According to the present invention, the engine switch can be attached by being inserted into the window hole through the insertion hole of the under cover, so that the assembling work can be simplified. The lead wire can be routed through the notch hole in the fan cover close to the ignition coil attached to the cylinder, and the wiring length can be shortened.
[0009]
Further , the window hole of the under cover opens a window hole provided with an insertion port at a tip side portion of a portion of the under cover that extends in a plate shape, and the insertion port is formed to be narrower than the window hole. Since the engine switch is inserted and attached to the window hole through the opening, it is easy to assemble the switch and work efficiency is further improved.
[0010]
Further, the under cover can be provided with a notch window above the engine switch, and a throttle lever can be arranged inside the notch window. Thus, the throttle lever is operable through the notch windows, the engine switch, the throttle lever, can close with a starter lever and the object to be operated is gathered close, it is very convenient for operation .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0012]
FIG. 1 is a side view of a crankshaft of a general-purpose engine according to an embodiment as viewed from a counter-output side end (starter lever side, hereinafter referred to as a side surface), and FIG. 3 is a plan view of the general-purpose engine, FIG. 4 is a side view of an air cleaner and an under cover mounted on the general-purpose engine, and FIG. 5 is an air cleaner and an under cover of FIG. FIG. 6 is an explanatory view in which the fan cover and the carburetor of the general-purpose engine are removed and the air cleaner and the fuel tank are partially cut away, FIG. 7 is a side view of the engine fan cover alone, and FIG. It is a front view of a fan cover simple substance.
[0013]
As shown in FIGS. 1 to 8, the general-purpose engine according to the embodiment is a forward-tilt engine in which the cylinder portion 1 is inclined in a horizontal direction toward the front and protrudes from the crankcase 11 in the installed state of the engine.
A cooling fan (cooling fan) 3 is connected to one side end of the crankshaft 2 (an end opposite to the crankshaft output end), and air cooling is performed by blowing air from the cooling fan 3 to the cylinder portion 1 for cooling during engine operation. (See FIG. 6 in particular).
[0014]
That is, a generally box-shaped fan cover 4 that bulges toward the cylinder portion 1 and covers the cooling fan 3 is provided at one end of the general-purpose engine.
The fan cover 4 is connected to a cooling cowl 25 that covers the cylinder part 1, and the air blown by the cooling fan 3 hits the cylinder part 1 through the cooling air passage that continues from the fan cover 4 to the cooling cowl 25.
[0015]
Further, a recoil starter is attached to the outer side of the fan cover 4 in one side direction. In this recoil starter, a starter lever 5 is located forward and adjacent to the fan cover 4 .
When the user starts the engine, when the user pulls the starter lever 5, the recoil starter meshes with the claw portion 6 at the center of the cooling fan 3 and rotates the crankshaft 2 to crank the engine, thereby starting the engine. It is like that.
[0016]
The recoil starter is covered with a cover 5a in which a plurality of net-like ventilation holes 5b are formed so that cooling air can easily enter the fan cover 4. Then, an air cleaner 10 is mounted in front of the starter lever 5 (in the direction of the cylinder portion 1 projecting side) and above the vaporizer 9.
[0017]
A carburetor 9 is connected to an intake hole 8 opened on one side (the one end side) of the cylinder head 7 connected to the tip part (front upper part) of the cylinder part 1. Accordingly, the carburetor 9 is located on the front side of the starter lever 5, and the intake passage from the air cleaner 10 mounted on the upper side of the carburetor 9 is connected to the carburetor 9 and cleaned by the air cleaner 10. The intake air thus supplied can be supplied to the carburetor 9, and consequently, the air-fuel mixture not mixed with dust and dust can be supplied into the cylinder portion 1 from the intake hole 8.
[0018]
A box-shaped fuel tank 12 is attached to the upper side of the crankcase 11 in a vertical alignment. The fuel tank 12 has a fuel cock 13 attached at a low position on the front side, and is piped to the carburetor 9 via the fuel cock 13. The fuel cock 13 has a cock lever 14 for opening and closing it. Is rotatably provided so that the supply of fuel to the vaporizer 9 can be opened and closed. A muffler 15 is disposed on the upper side of the cylinder portion 1 and on the opposite side of the vaporizer 9.
[0019]
As shown in FIGS. 1 to 6, an under cover 16 extending so as to cover the outside of the vaporizer 9 is integrally formed or connected to the lower side of the air cleaner 10 (in the embodiment, the upper cover screw is used for air The upper lid of the cleaner can be opened and closed). The under cover 16 covers the upper outer side of the carburetor 9, and a front end portion is formed with an intake passage 16a from the air cleaner 10 to the carburetor 9 in a substantially columnar shape having a rectangular cross section. The intake passage 16a A portion 16b extending in a plate shape from the side toward the crankshaft 2 covers the outside of the carburetor 9 from the side surface side.
[0020]
A window hole 18 in which an insertion port 17 is formed is opened at the tip (one side end) of the portion 16b of the under cover 16 extending in a plate shape, and an engine switch 19 is attached to the window hole 18. Yes. The insertion port 17 is formed to be substantially C-shaped and narrower than the window hole 18, and prevents the engine switch 19 from falling off after installation.
[0021]
The engine switch 19 is connected to a lead wire 22 through a notch hole 21 in the fan cover 4 from an ignition coil 20 attached to the cylinder portion in the fan cover 4. The insertion port 17 toward the rear (crankshaft 2) is opened, and the engine switch 19 is inserted into the window hole 18 through the insertion port 17 and attached.
[0022]
Further, the under cover 16 is provided with a notch window 23 above the engine switch 19, and a throttle lever 24 is disposed inside the notch window 23.
[0023]
According to the embodiment, the engine switch 19 can be attached by being inserted into the window hole 18 from the insertion port 17 of the under cover 16, so that the assembling work can be simplified. And the lead wire 22 can be wired through the notch hole 21 of the fan cover 4 near the cylinder coil 1 and the ignition coil 20, and the wiring length can be shortened.
[0024]
Further, the window hole 18 of the under cover 16 has an insertion port 17 that opens rearward, and the engine switch 19 can be installed by being inserted into the window hole 18 through the insertion port 17. In this way, the assembly of the engine switch 19 is easy and the working efficiency is further improved.
[0025]
Further, the under cover 16 is provided with a notch window 23 above the engine switch 19, and the throttle lever 24 is disposed inside the notch window 23 so that the throttle lever 24 can be operated through the notch window 23. In addition , the engine switch 19 can be close to the throttle lever 24 and the starter lever 5, and the objects to be operated are gathered nearby, which is very convenient for sexual operation.
[0026]
【The invention's effect】
As described above, according to the present invention, the engine switch can be attached by being inserted into the window hole from the insertion hole of the under cover, so that the assembling work can be simplified. Further, the lead wire can be routed through the notch hole of the fan cover close to the ignition coil attached to the cylinder, and the wiring length can be shortened.
[0027]
In addition , the window hole of the under cover has an insertion port opened at the crankshaft side end of the portion of the under cover that extends in a plate shape , and the engine switch is inserted into the window hole through the insertion port and attached. Therefore , the switch can be easily assembled, and the working efficiency is further improved.
[0028]
In addition, the under cover is provided with a notch window in the upper part of the engine switch, and if the throttle lever is arranged inside the notch window, the throttle lever can be operated through the notch window, and the engine switch The throttle lever and starter lever can be close to each other, and the objects to be operated are gathered nearby, which is very convenient for operation.
[Brief description of the drawings]
FIG. 1 is a side view of a crankshaft of a general-purpose engine according to an embodiment as viewed from a non-output side end.
FIG. 2 is a front view of the general-purpose engine as viewed from the cylinder tilt side.
FIG. 3 is a plan view of the general-purpose engine.
FIG. 4 is a side view of an air cleaner and an under cover mounted on the general-purpose engine.
FIG. 5 is another side view of the air cleaner and under cover of FIG. 4;
FIG. 6 is an explanatory view in which a fan cover and a carburetor of the general-purpose engine are removed, and an air cleaner and a fuel tank are partially cut away.
FIG. 7 is a side view of a single fan cover of the engine.
FIG. 8 is a front view of a single fan cover.
FIG. 9 is an explanatory diagram of a conventional general-purpose engine switch mounting structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cylinder part 2 Crankshaft 3 Cooling fan 4 Fan cover 5 Starter lever 7 Cylinder head 8 Intake hole 9 Vaporizer 10 Air cleaner 11 Crankcase 16 Undercover 17 Insertion port 18 Window hole 19 Engine switch 20 Gnenit coil 21 Notch hole 23 Notch window 24 Throttle lever

Claims (2)

When the engine is installed, the engine cylinder is inclined to the front and protrudes from the crankcase. A starter lever, a cooling fan, and a fan cover are provided on one end of the crankshaft of the engine. In a general-purpose engine with an air cleaner mounted on the upper side of the vaporizer,
An under cover that covers the outside of the vaporizer from the side surface side is connected to the lower side of the air cleaner, and the under cover has a portion extending in a plate shape toward the crankshaft,
Open a window hole with an insertion port at the crankshaft side end of the undercover plate-like portion ,
The insertion opening width narrower formed than the window hole, crowded difference engine switch window hole through the insertion opening attachment Rutotomoni,
The engine switch mounting structure for a general-purpose engine is characterized in that a lead wire is connected to the engine switch from an ignition coil mounted on the cylinder portion in the fan cover through a notch hole in the fan cover. 2. The engine switch mounting structure for a general-purpose engine according to claim 1 , wherein the under cover is provided with a notch window at an upper part of the engine switch, and a throttle lever is disposed inside the notch window.

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