JPS6056155A - Float valve mechanism for carburetor - Google Patents

Abstract

PURPOSE:To improve the accuracy of a constant oil level in a simple structure, by molding two fixed shafts solidly with a wire rod upon coupling, and locking one side of these shafts to a groove installed in a float chamber, while forming a stopper part in the wire rod coupling part. CONSTITUTION:Two turning shafts 8 and 11 turns round to set each of two fixed shafts 7 and 10 down to their shaft cores, and both these turning shafts 8 and 11 are solidly coupled together whereby an inflow valve 4 is opened or closed according to an up-and-down motion of a float 5, thus a constant oil level B-B is formed. In this case, both fixed shafts 7 and 10 are coupled and molded solidly with a wire rod, and a part of the fixed shaft 7 is fitted in a fixed groove 13 installed in a float chamber 1, then the fixed shaft 7 is accurately locked to the inflow valve 4 in both vertical and horizontal directions, while a stopper part 14 is made up of a coupling wire rod so as not to cause the turning shaft 11 at the top center of the float 5 to become more upward than the fixed shaft 10. With this constitution, locking both these fixed shafts 7 and 10 to the float chamber 1 is accurately and easily performed, thereby improving the accuracy of a constant oil level.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is based on a fast-starting embodiment related to improving the constant oil level of a float valve device of a carburetor using a toggle mechanism.

Regarding the float valve device of the vaporizer with toggle mechanism. Patent application 58-0442 already filed by the same applicant
87@ provides a detailed explanation of its configuration and its comparative advantages over conventional flow 1 to arm type float valve devices, but to summarize, in the conventional float arm type, the closing force of the float valve is equal to that of the float. While the horn expansion rate is constant depending on the arm ratio with respect to buoyancy, in the toggle m configuration, the
The force magnification of the float buoyancy increases in a quadratic manner until the closing position of the l-l- valve reaches the closing position, and the closing of the valve from Flow 1 to Flow 1 becomes more reliable, and even under strong vibrations, the force increases to - of the fuel oil level. It is explained that stable carburetor performance can be maintained with little fluctuation and without increasing the size of the carburetor chamber.

To explain the drawings, Fig. 1 is a top view of the float chamber of the carburetor of the present invention, and Fig. 2 is a top view of the float chamber in Fig. 1.
FIG. 3 is a longitudinal cross-sectional view of the ArIEi plane.

In the figure, 1 is the float chamber of the vaporizer, which is indicated by the chain line C.

It is fixed to the lower part of the carburetor main body 2. Reference numeral 3 denotes an inlet of the fuel 1, 4 an inlet valve, and 5 a folloW which moves in accordance with the fuel oil level through a central through hole inscribed in the guide shaft portion 6.

At 7, a rotating arm 9 is attached to integrally constitute the opening/closing arm of the inflow valve 4 and the connecting arm with the rotating shaft 8, with the fixed shaft C as the axis.
There is.

Reference numeral 10 denotes a fixed shaft, which is fixed at a symmetrical position with respect to the rotating shaft 8, which narrows the shaft 5. With the fixed shaft 10 as the axis center, ζ thickness - 1 ~
The rotation iI connected to the rotation axis 11 on the central upper surface of 5! IJ Shogo 1
2, which is in contact with the ``1'' surface of the flow 1-5 at the bottom of the rotating shaft 11.

The rotation axis 8 and rotation axis 11 are #! as shown in the figure. It is integrally connected and molded in A month etc.

Since it is constructed in this way, the rotation axis 11 is fixed @1
0, the rotating shafts 8 can each rotate around the fixed shaft 7,
By integrally connecting the rotating shaft 8 and the rotating shaft 11, the 5
The inflow valve 4 can be opened depending on the vertical movement of the oil, and a constant oil level BB is formed.

In a float pulp apparatus using such a toggle mechanism, the closing force of the inflow valve 4 is such that the lower the line connecting the fixed shaft 10 and the rotating shaft 11 is horizontally, the smaller the angle is.) ! The force expansion rate due to the buoyant force of i increases in a quadratic curve, and the valve is more securely closed. However, when the line connecting the fixed shaft 10 and the rotating shaft 11 becomes horizontal, moves upward, and bends back, the inflow valve closes. 4 is in the direction away from the closed position, so it must never be between 1 and 1.

As described above, the float valve device has the advantage of increasing the expansion ratio of the force and ensuring the closure of the inlet valve 4, but the device has a large number of parts and requires a high degree of precision. It is necessary to

In particular, the fixed shaft 7 and the fixed shaft 10 have a distance of −(or maximum b 1!11
th, and the lifting platform which fixes these separately in the flow 1 to chamber 1 is the molding of the float chamber ＼1 difference or )[:4-1
- If the sky is plastic snack molding, there is a risk that the distance between the axes will increase due to thermal expansion.

The present invention solves this problem! In order to hang the fixed shaft 7 and the fixed shaft 10, the fixed shaft 7 and the fixed shaft 10 are integrally connected and molded with a wire rod, and the fixed shaft 7 portion is provided in the float chamber 1. At the same time, the rotating shaft 11 at the center of the upper surface of 1 to 5 is fixed to the fixed shaft 10J. : Make a part of the stopper 1/'I of the continuous V5 wire so as not to form an upper horn.

For this reason, the fixing of the fixing shafts 7 and 10 from u-1 to chamber 11 is secure and easy, and the distance between the shafts is more accurate than that of the electric oil 1rLi. It has great industrial effects, such as improved performance and further cost reduction.

[Brief explanation of drawings]

Fig. 1 is a side view of the vaporizer chamber D-1 of the present invention, U)2
The figure is Figure 1 Flow 1 ~ Chamber top view △Δ [W of 91 plane, cross section (there is.

Claims (1)

[Claims] The fixed shaft 7 and the fixed shaft 10 are integrally connected and molded with a wire rod, and the fixed shaft 7 portion is inserted and fixed into a fixed groove 13 provided in the float chamber 1, and the rotating shaft 11 is positioned above the fixed shaft 10. A float valve device for a carburetor with a toggle mechanism comprising a stopper 14 on the connecting wire portion to prevent the above-mentioned.