JPS6221732Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a carburetor, and more specifically, the present invention relates to a carburetor, and more specifically, the fuel nozzle is connected to each of a plurality of fuel nozzles that open to an intake passage formed in the carburetor body, and is opened below the fuel oil level in a float chamber. This invention relates to improvements in carburetors with multiple fuel jets.

Conventionally, as shown in Japanese Utility Model Application No. 54-64837, a technique has been proposed in which a plurality of fuel jets are integrated.

However, even though the fuel jets of the prior art are integrated, they all communicate with a single fuel nozzle. Therefore, each of the plurality of fuel jets is not connected to each of the main and auxiliary fuel nozzles, but if it is attempted to communicate with each of the main and auxiliary fuel nozzles, these fuel jets must be formed individually. , must be installed on each vaporizer body. This not only increases the number of parts, but also complicates the structure for attaching the fuel jet to the carburetor body, resulting in the carburetor body being larger than its function.

The present invention has been developed in view of the above-mentioned points, and its gist is that the fuel oil level in the float chamber is In a carburetor comprising a plurality of fuel jets opening downward, the plurality of fuel jets are integrally formed of synthetic resin; The plurality of fuel jets are integrally formed so that each jet passage is parallel to each other. This carburetor is characterized in that these integral parts are supported by a single spring member supported by a float chamber body, and its purpose is to reduce the number of parts. The purpose of the present invention is to provide a carburetor that has a simple structure and can be made as compact as possible, and in particular, to easily integrate a plurality of fuel jets connected to the main and auxiliary fuel nozzles into one body. The purpose is to provide a vaporizer that is easy to mold. In addition, the plurality of fuel jets can be supported by a single spring member, making it easy to attach the fuel jets to the carburetor.

Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a sectional view of an embodiment of the present invention,
FIG. 2 is a sectional view taken along the section line - in FIG. 1.

1 is a carburetor main body in which an intake passage 2 is formed;
Bench lily 3 formed approximately at the center of the intake passage 2
A choke valve 4 is provided on the upstream side of the intake path 2, and a throttle valve 5 is provided on the downstream side.
will be provided. Next, 6 is a synthetic resin float chamber body forming the float chamber 7, and using a pair of connectors 8 formed integrally with the float chamber body 6, and via an annular sealing member 9, The float chamber body 6 is detachably provided in the carburetor main body 1. A main fuel nozzle 10 opening into the intake passage 2 and an air bleed pipe 11 for communicating the main fuel nozzle 10 below the fuel oil level L in the float chamber 7 are provided in a portion of the carburetor body 1 facing the float chamber 7 . A main fuel jet 12 and an auxiliary fuel jet 13 are mounted and supported by a support member 14. The support member 14 includes a holder portion 15,
A valve seat portion 18 on which a float valve 17 interlocked with the float 16 is seated, and a support member 20 that rotatably supports a pin 19 that pivotally supports the float 16 are integrally made of, for example, synthetic resin. formed and formed.

The holder part 15 allows the main fuel nozzle 10, the air bleed pipe 11, the main fuel jet 12,
and an auxiliary fuel jet 13 are surrounded and supported. The auxiliary fuel jet 13 and the auxiliary fuel nozzle 21 opened to the intake passage 2 are communicated by a low-speed fuel passage 22 formed in the holder portion 15.
The plurality of fuel jets, ie, the main fuel jet 12 and the auxiliary fuel jet 13, are made into a single body 32 so that they can be attached as one body. In the embodiment shown in FIGS. 1 and 2, the main fuel jet 12 and the auxiliary fuel jet 1
3, the main fuel nozzle 10 and the air bleed pipe 11 are also integrally formed of synthetic resin as a mounting body 23. As another embodiment of the present invention, as shown in FIG. Only the main fuel jet 12 and the auxiliary fuel jet 13 are integrated into the unit 3.
It may be formed as 2.

Integrated fuel jet 1 in each of the above embodiments
2 and 13 are stretched between a short cylindrical portion 25 below the collar 24 formed at the lower end of the fuel jets 12 and 13 and a convex portion 26 bulging out on the inner surface of the float chamber body 6. It is supported from below by a single coiled spring member 27. This facilitates the support mechanism for multiple fuel jets. and thereby allows each fuel jet 1 to be removed from the holder part 15.
2 and 13 from falling off.

The present invention is particularly applicable to each fuel jet 12,1.
Since the jet passages 3 are parallel to each other, casting in the molding of the integral part 32 of each fuel jet can be carried out more easily since the drawing direction is in a single direction. Even if multiple fuel jets are integrally formed, easy casting as described above is not possible when molding where one jet passage and the other jet passage form an angle. It is possible.

Furthermore, the present invention has a simple structure in which a single spring member 27 supports a plurality of fuel jets, making it easy to attach the fuel jets to the carburetor.
At the same time, it is possible to prevent the fuel jet from falling out of the carburetor.

Note that with respect to the support member 14, the main fuel jet 1
The main fuel jet 12 and the auxiliary fuel jet 13 are in airtight contact through annular seal members 28 and 29 fitted to the main fuel jet 12 and the auxiliary fuel jet 13, respectively. Further, the support member 14 is hermetically fixed to the carburetor main body 1.

In the embodiment shown in FIGS. 1 and 2, the axis m1 of the main fuel nozzle 10, the air bleed pipe 11, and the main fuel jet 12, and the axis m2 of the holder portion 15 of the support member 14 are are at mutually shifted positions, even if the main fuel nozzle 10 tries to rotate around the axis m1 of the fuel nozzle 10, it will be blocked by the auxiliary fuel jet 13 and will not rotate. Therefore, in order to prevent fuel from being undesirably discharged due to, for example, blowback from the intake pipe of an internal combustion engine, a main fuel nozzle 10 is installed as shown in the figure.
When the opening direction is set toward the downstream side of the intake passage 2, displacement in the opening direction is reliably prevented. Furthermore, in the embodiment of the present invention, most of the parts except the carburetor body 1 are made of synthetic resin, so that weight reduction is achieved.

As detailed above, according to the present invention, a plurality of fuel jets are individually communicated with each fuel nozzle, and the jet passages of the plurality of fuel jets are formed so as to be parallel to each other. Therefore, it is easy to cast out when molding with synthetic resin, shortening the overall molding process and the number of parts.
This allows the vaporizer to be made smaller, lighter, and lower in manufacturing cost.

In addition, since the structure is such that multiple fuel jets are supported by a single spring member, it is easier to attach the fuel jets to the carburetor, and at the same time, it is possible to prevent the fuel jets from falling off from the carburetor. It is something.

[Brief description of the drawings]

Attached Drawings Fig. 1 is a longitudinal sectional view showing one embodiment of the present invention, Fig. 2 is a sectional view taken from the - line in Fig. 1, and Fig. 3 is a sectional view of essential parts showing another embodiment of the present invention. It is. DESCRIPTION OF SYMBOLS 1... Carburetor main body, 2... Intake path, 3... Float chamber, 10... Main fuel nozzle, 12... Main fuel jet, 13... Sub-fuel jet, 21... Sub-fuel nozzle, 30, 31 ...Jet passage, 32
...A combination of multiple fuel jets.

Claims (1)

[Claims for Utility Model Registration] A plurality of fuel nozzles 10 and 21 that are opened below the fuel oil level L in the float chamber 7 and communicated with each of the plurality of fuel nozzles 10 and 21 that are opened to the intake passage 2 formed in the carburetor body 1. In the carburetor, the plurality of fuel jets 12, 13 are integrally formed of synthetic resin; A carburetor characterized in that they are integrally formed in parallel and that this integral body 32 is supported by a single spring member 27 supported by a float chamber body 6.