JPS59160062A - Float device for carburettor - Google Patents

Abstract

PURPOSE:To permit to reduce the number of component parts as well as the man-hours for assembling by a method wherein the main body of the float, a float lever and a float shaft are formed integrally by synthetic resin and the float shaft is supported rotatably by a supporting arm through bearings. CONSTITUTION:The float 7, consisting integrally of the main body 8 by the float, the float lever 9 and the float shaft 10 which are made of synthetic resin, is supported rotatably by a pair of supporting arms 20. The supporting arm 20 consists of a pair of protuberances 21, formed at one part of a float block 5, and a pair of protuberances 22 of a choke block 1 while the bottom of the protuberance 22 is formed with the recess 23 cooperating with the protuberance 21 to support rotatably the both ends of the shaft 10. Accordingly, if the float shaft 10 is being disposed inbetween the protuberances 21, 22 when the choke block 1 is incorporated into the float block 5, the float 7 may be supported rotatably. According to this method, the number of components may be reduced and the assembling procedures may be simplified.

Description

[Detailed description of the invention] [Field of application of the invention] The present invention relates to a float device for a carburetor.

゛ [Prior art] The conventionally proposed float device for a vaporizer is
As described in Publication No. 6-83555, a float lever also made of synthetic resin is integrally formed on a hollow float body made of synthetic resin, and a hollow metal collar is provided in the insertion hole provided in the float lever. A float with an inserted and fixed structure is positioned between a pair of pivot arms,
By inserting a separately made metal float shaft through the pivot arm and the hollow metal collar, the float was configured to be rotatably supported by the pivot arm.

However, in a 70-tooth device with such a configuration, (1) a structure in which a hollow metal collar is inserted and fixed into the float lever is adopted, so components such as the hollow metal float shaft are (2) The process of inserting and fixing the hollow metal collar into the 70-rubar, and inserting the metal float shaft into the pivot arm and the hollow metal collar to allow the float to rotate freely. The problem is that it requires a pivoting process, making the assembly process complicated.
was there.

[Purpose of the invention]

An object of the present invention is to provide a float device for a carburetor that can reduce the number of parts and simplify the assembly process.

[Summary of the invention]

The present invention has a float shaft for rotatably supporting a float, a 70-treader, and a float body integrally formed of synthetic resin, and the float shaft is rotatably supported by seven-axis support arms. It is.

According to this structure, the float shaft that rotatably supports the float is integrally formed with the float shaft, so the hollow metal collar and metal float shaft can be eliminated, and the hollow metal collar is inserted and fixed into the float lever. The process of attaching the metal float shaft to the supporting arm,
This makes it possible to eliminate the process of inserting it into a hollow metal collar.

[Embodiments of the invention]

FIG. 1 is a sectional view of a carburetor employing a float device according to the present invention, and will be described below.

In FIG. 1, fuel passes through a nipple 2 fixed to a choke block 1, a seat portion 4 of a shift float valve 3, and flows into a float chamber 6 formed in a float block 5.

A float 7 is disposed within the float chamber 6, and this float 7 has a hollow float body 8 as shown in FIG.
, a float lever 9, and a float shaft 10, which are integrally formed of synthetic resin.

Returning to FIG. 1, a movable rod 11 is pressed into contact with the upper part of the float lever 9 by the force of a spring 120, and the spring 12 simultaneously presses the float pulp 3 toward the seat portion 4 side.

When the float chamber 6 is filled with a predetermined amount of fuel, the float main body 8 is lifted up, and the seat portion 4 is closed by the 70-tonokurp 3, stopping the inflow of fuel.

On the other hand, the fuel in the float chamber 6 is metered by the main jet 13 and reaches the main well 14, and at this time, the air metered by the main air bleed 15 also flows into the main well 14, and the air mixture flows from the main nozzle 16 to the venturi. 17.

A throttle block 18 is located below the float block 5.
is fixed, and a throttle valve 19 is rotatably supported on this portion.

In the present invention, the system shown in FIG. 2,
A float 7 in which a float body 8, a float lever 9, and a float shaft 10 are integrally formed of synthetic resin.
is rotatably supported by a pair of supporting arms 20.

The pivot arm 20 has a pair of protrusions 21 formed on a part of the choke block 5 and a pair of protrusions 22 formed on a part of the choke block 1, as shown in FIGS. It is well structured.

The bottom of the protrusion 22 formed on a part of the choke block 1 is shaped to rotatably support both ends of the float shaft 100 in cooperation with the protrusion 21 formed on the float block 5. A recess 23 is formed to form a shaft support hole.

Therefore, when assembling the choke block 1 to the float block 5, if the float shaft 10 of the float 7 is inserted between the protrusions 21 and 22, the float shaft 10 will be able to rotate between the protrusions 21 and 22. Thus, the float 7 is rotatably supported around the float shaft 1o as a fulcrum.

In the embodiment shown in FIG. 3, the protrusion 22 of the choke block 1 is provided with a recess 23, but in addition to this, the protrusion 21 of the 70-block block 5 may be provided with a recess. It is also permissible to provide a recess.

Next, some embodiments of a method for supporting the float 7 will be described with reference to FIGS. 4 and 5.

In the embodiment shown in FIG. 3, the float shaft 1
0 is clamped and pivotally supported by the protrusion 21 of the float block 5 and the protrusion 22 of the choke block 1.
The embodiment shown in FIG. 4 shows one in which the shaft is supported by one of the protrusions.

In FIG. 4, an L-shaped slot 24 is formed in a pair of protrusions 21 formed on the float block 5. As shown in FIG. This slot 24 includes a guide slot 25 and a shaft support hole 26 as shown in FIG.
The width t of the guide groove hole 25 is the diameter D1 of the shaft support hole 26.
It's smaller. Further, the diameter D2 of the float shaft 1o of the float 7 is set to be slightly larger than the width l of the guide groove hole 25 and slightly smaller than the diameter of the shaft support hole 26.

That is, the relationship between the respective dimensions is DI>D2>l.

Therefore, in order to pivotally support the float shaft 10 of the float 7 in the support hole 26, it is sufficient to insert the float shaft 10 into the guide groove hole 25 and move it along the guide groove hole 25 as it is. In this case, float shirt) 10
Since it is made of synthetic resin, the float shaft 10
is elastically deformed in the guide groove hole 25, so it becomes a float shirt)
There is no problem in inserting the 10.

In the embodiment shown in FIGS. 4 and 5, the L-shaped slot 24 is formed on the protrusion 2 formed on the float block 5.
1, but it can also be provided on the protrusion 22 of the choke block 1.

〔Effect of the invention〕

As described above, according to the present invention, the float main body, float lever, and float shaft are molded with synthetic resin 14 and the pin is rotatably supported on the support arm. This eliminates the need for any metal float shaft, and also eliminates the process of inserting and fixing a hollow metal collar into the float lever and the process of inserting the metal float shaft through the pivot arm and the hollow metal collar.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a vaporizer employing a float device according to the present invention, FIG. 2 is a front view showing the float of the present invention, and FIG.
The figure is a perspective view showing the configuration for pivotally supporting the float.
The figure is a perspective view showing another configuration of the reservoir that pivotally supports the float.
FIG. 5 is a diagram showing the configuration of FIG. 4 in further detail. DESCRIPTION OF SYMBOLS 1... Choke block, 5... Float block, 6... Flow chamber, 7... Float, 8... Float body, 9... Float lever, 10... Float shaft, 20 ...Spindle arm, 21.22...
・Protrusion, 23... Recess, 24... Slot, 25...
・Guide slot, 26γ Fig. 2 '4za 13 Fig.

Claims (1)

[Scope of Claims] 1. A float body arranged in a float chamber of a carburetor and connected via a float lever to the float shaft, which rotates around the float shaft in accordance with changes in the level of fuel in the float chamber. A carburetor comprising a float and a float pulp that is interlocked with the float lever and regulates the fuel flowing into the float chamber in order to maintain a substantially constant fuel level in the float chamber. In the float device, the float main body, the float lever, and the float shaft are integrally formed of synthetic resin, and both ends of the float shaft are supported by a pair of pivot arms extending into the float chamber. A float device for a carburetor, characterized in that the float device is configured to be rotatably supported. 2. In claim 1, the pivot arm is configured to support the float from a choke block constituting the carburetor. The float shaft is similar to the first protrusion extending into the chamber and the float block constituting the carburetor, and the second protrusion extending into the float chamber. A float device for a carburetor, characterized in that the float shaft is rotatably supported by a shaft support hole formed between the float shaft and the float shaft. The pivot arm includes a protrusion extending into the float chamber from either a choke block or a float block constituting the carburetor, and the protrusion includes a pivot hole for pivoting the float shaft and a support hole for pivotally supporting the float shaft. 4. A float device for a carburetor, characterized in that a guide groove is formed to guide the float shaft to the shaft support hole. 4. In claim 3, the width of the guide groove is determined by The shaft has a length slightly smaller than the diameter of the 70-tooth shaft so as to be able to deform and move, and the pivot hole has a diameter slightly larger than the diameter of the float shaft so that the float shaft can rotate. A float device for a vaporizer that is characterized by: