JPS6337479Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a forced air-cooled vertical shaft engine equipped with a recoil starter, and aims to make the entire engine small and compact, and to improve the tilting performance of the engine.

In order to achieve this object, the present invention arranges a cooling fan on the crankcase of the engine body, arranges a fuel tank in a space on one side of the cooling fan and the recoil starter arranged above it, and A cylinder is extended diagonally to the side from the side where the fuel tank is arranged, and a carburetor is arranged in the space left on the side of the cylinder, so that the cylinder and carburetor are installed below the fuel tank. They are arranged side by side on the left and right. Embodiments of the present invention will be described based on the drawings.

Figure 1 is a side view of the agricultural walking management machine.
This control machine has a French rotor attachment 4 attached to the lower side of a vertical axis air-cooled engine 1 via a gear case 2 and a transmission 3, and is operated via a handle 5 raised diagonally backward from the transmission 3. . Reference numeral 6 indicates a mudguard fender, 7 indicates a front bumper, and 8 indicates a parking stand.

The engine 1 includes a recoil starter 11 and a cooling fan 12 arranged vertically on a crankcase 10 of an engine main body 9, as shown in FIGS. 2 and 3. Reference numeral 13 is a flywheel formed integrally with the cooling fan 12.

The recoil starter 11 and cooling fan 12
A fuel tank 14 made of synthetic resin is arranged on the rear side. The fuel tank 14 is covered by a bonnet 16 supported on the upper part of the engine body 9, and placed on a tank stay 17 mounted between the left and right rear lower edges of the bonnet 16. A buffer member 18 made of felt or the like is interposed between the fuel tank 14, the upper wall of the bonnet 16, and the tank stay 17,
The synthetic resin nut 20 screwed onto the oil filler pipe 19 of the fuel tank 14 is tightened to fix the fuel tank 14 to the bonnet 16. Decorative covers 21 and 22 made of synthetic resin are screwed to the front and rear of the bonnet 16.

Below the fuel tank 14, as shown in FIG.
Connect. The cylinder 23 extends rearward and obliquely from the rear of the crankcase 10, and the carburetor 24 is disposed in a space formed on the side of the cylinder 23.

As shown in FIGS. 5 and 6, this air cleaner 25 has an elastic support 28 inscribed in an element 27 fixedly attached to a fixed plate 26, and a peripheral wall 29 extending from the periphery of the fixed plate 26. A part of the element 27 is fixed by receiving the circumferential surface of the element 27 which is externally supported by the elastic support 28. Reference numeral 30 indicates an air cleaner cover, and 31 indicates a buckle for removably fixing the air cleaner cover 30 to the fixing plate 26.

Inside the bonnet 16, as shown in FIG.
A baffle plate 32 for guiding cooling air toward the cylinder 23 is provided.

A part of the baffle plate 32 is bulged outward from the outer end surface of the wall of the crankcase 10 to allow cooling air to flow through the opening 33 formed between the lower edge of the baffle plate 32 and the crankcase 10. It is made to flow along the crankcase 10. By flowing the cooling air along the outer end surface of the crankcase 10, the lubricating oil within the crankcase 10 is cooled, and deterioration of the lubricating oil is prevented over a long period of time. In this case, a group of fins 3 are provided on the outer end surface of the wall of the crankcase 10.
4 are provided protrudingly to rectify the cooling air and expand the heat dissipation area, so that the cooling effect is further enhanced, and the regularly arranged group of fins 34 provides a design effect.

Incidentally, obtaining the lubricating oil cooling effect by branching the cooling air to the outer surface of the crankcase 10, and in that case, the enhancement of the cooling effect and the design effect by attaching the fins 34 to the crankcase 10, can be achieved by, for example, As shown in Figures 7 and 8,
It can also be applied to vertical air-cooled engines.

Since the present invention is configured as described above, the present invention has the following effects.

(a) The fuel tank is placed in the space on one side of the recoil starter and cooling fan, which are arranged vertically on the crankcase, so that the fuel tank is not placed in the space on one side of the crankcase.
The space on one side of the recoil starter and cooling fan, which used to be a dead space, can now be used effectively, and the space left on one side of the crankcase can now be used as a cylinder.
The space can be effectively used for arranging the vaporizer. Furthermore, by extending the cylinder diagonally to the side from the side where the fuel tank is located on the side of the crankcase, and arranging the carburetor in the space left on the side of the cylinder, a space is created on the side of the cylinder. The space can be opened and used effectively as a space for arranging the vaporizer.

Therefore, the fuel tank, cylinder, and carburetor are arranged compactly in the engine body, and the entire engine can be made extremely small and compact.

(b) In addition, the fuel tank is placed higher than the engine body, and the carburetor is placed near the bottom of the fuel tank, so no matter which direction the engine tilts, the fuel tank will always be above the carburetor. It will be located at the top. Therefore, it is possible to eliminate the drawbacks that occur when the fuel tank and the carburetor are placed separately on the front and rear sides of the engine body.

In other words, if the fuel tank and carburetor are piped separately at the front and rear sides of the engine body, if the engine tilts significantly in the longitudinal direction, the fuel tank will be located below the carburetor. In this state, fuel cannot be supplied from the fuel tank to the carburetor using the height difference between the height of the fuel tank and the height of the carburetor, resulting in an insufficient supply of fuel to the carburetor. There is a drawback that the slope performance is inferior.

In contrast, with the present invention, as mentioned above, the fuel tank is always located above the carburetor no matter which direction the engine is tilted, so the fuel in the fuel tank is always utilized by using the height difference. The fuel can be supplied to the carburetor below, eliminating insufficient supply of fuel to the carburetor and improving tilting performance.

(c) Furthermore, by raising the fuel tank to the space on one side of the recoil starter, the vertical width of the fuel tank can be increased, increasing the capacity of the fuel tank. By applying a large inflow pressure to the carburetor, fuel can be quickly supplied to the carburetor.

[Brief explanation of the drawing]

Figures 1 to 6 show an embodiment of the present invention, in which Figure 1 is a side view of an agricultural walking management machine, and Figure 2 is a side view of an agricultural walking management machine.
The figure is a vertical side view of the main parts, Figure 3 is a plan view of the engine across the bonnet, Figure 4 is a rear view of the engine, and Figure 5 is a partially cut away bonnet.
FIG. 6 is a plan view of the engine with the fuel tank removed, and FIG. 6 is a side view of the main parts of the engine. FIG. 7 and FIG. 8 show an embodiment of a device different from the present invention,
FIG. 7 is a plan view, and FIG. 8 is a side view. 9... Engine body, 10... Crank case, 11... Recoil starter, 12... Cooling fan, 14... Fuel tank, 23... Cylinder,
24... vaporizer.

Claims (1)

[Scope of utility model registration request] A cooling fan 12 is disposed on the crankcase 10 of the engine body 9, and a fuel tank 14 is disposed in one side space of the cooling fan 12 and the recoil starter 11 disposed above the cooling fan 12. The cylinder 23 extends obliquely to the side from the side where the tank 14 is arranged, and the carburetor 24 is installed in the space left on the side of the cylinder 23.
The cylinder 2 is placed below the fuel tank 14.
3 and a carburetor 24 are arranged side by side on the left and right.