JPS588917Y2 - Throttle valve connection mechanism in multiple carburetor - Google Patents

Description

[Detailed description of the invention] This invention is an improvement of the connecting mechanism of the throttle valve in a multiple carburetor (
This is related.

In a multiple carburetor, the throttle valve shafts of each carburetor are connected to each other, and by rotating the throttle valve shaft of one carburetor, the throttle valves of all the carburetors are operated once at the same time. However, each cylinder of the engine is separate (the throttle valve shafts of each carburetor are connected to each other so that the idling of each carburetor can be adjusted to achieve best idling). is necessary.

For this purpose, an idle adjustment screw is provided on the husband's throttle valve shaft at the connecting portion t, and a spring is pressed against the adjustment screw.

In other words, the throttle valve of each carburetor is freely attached by spring pressure contact.

Because the throttle valve is constructed in this way, if the throttle valve does not operate smoothly, the rotational resistance of the throttle valve will exceed the above spring pressure (and even if the throttle valve returns the The throttle valve of the carburetor may not return properly and the engine load may not be reduced.

Present invention I This throttle valve connection mechanism allows the iso ring adjustment of each carburetor to be performed independently, and even if any of the above-mentioned carburetors is in a state where the throttle valve operation is not smooth, It is designed so that it can be forcibly returned by 1, and will be explained next with reference to the drawings.

Fig. 1 is a front view showing a conventional throttle valve connection mechanism of a triple carburetor, and Fig. 2 is a cross section taken along A-A. A throttle valve shaft of a carburetor,
The throttle valve shaft 4 of the carburetor 1 is the main shaft for throttle valve operation.

That is, 1 is a throttle valve lever fixed to the throttle valve shaft 4, 8 is a wire terminal rotatably attached to the tip of the lever, 9 is a wire for operating the throttle valve, and 10 is a throttle valve return spring.

Reference numeral 11 denotes a throttle valve connecting piece that projects perpendicularly (that is, horizontally) to the throttle valve lever 7f, and the idling of the throttle valve shafts 5 of the adjacent carburetors 2 can be adjusted by using this connecting piece. t is engaged.

12 is a retaining member that engages with the connecting piece 11 fixed to the throttle valve shaft 5; 13 is an idle adjustment screw attached to the upper part of the engaging member 12; and 14 is the connecting piece 11i. The connecting piece press rond mounted on the opposite side of the adjustment screw 13 is constantly pressed against the connecting piece by the pressure contact spring tSt, and the connecting piece 11 (throttle valve shaft 5) and the engaging part body 12 (throttle valve shaft 5) are connected to each other. The valve stem 4) is still engaged.

As described above, the throttle valve shaft 4 of the carburetor 10 and the throttle valve shaft 5 of the carburetor 2
Since it is freely engaged by the pressure contact spring 15,
The idle adjustment of the throttle valve of the carburetor 2 can be freely adjusted by adjusting the adjustment screw 13.

That is, when the screw 13 is screwed in, the pressure welding screw 15 is pressed, and the engaging part body 12 is rotated in the counterclockwise direction in FIG. vaporizer 1
Although the idle adjustment screw for the throttle valve is not shown, it is provided separately.

The same applies to the carburetor 3t; a throttle valve connecting piece 11' is fixed to the right end (Fig. 1) of the throttle valve shaft 4 of the carburetor 1, and the left end 3 of the throttle valve shaft 6 of the carburetor 3 is fixed to the right end (Fig. 1) of the throttle valve shaft 4 of the carburetor 3. An idle adjustment screw 13' and a connecting piece push rod 14 face each other with the connecting piece 11' in between.
An engaging body 12' having a pressure contact spring 15' and a pressure contact spring 15' is fixed.

Since the throttle valve shaft connection of the conventional multiple carburetor is configured as described above, resistance is added to the rotating part of the throttle valve of carburetor 2 or 3, which prevents the throttle valve from rotating. If it becomes uneven, even if you return the throttle valve operation wire 9 during engine operation, the throttle valve connecting piece 11 of the carburetor 1 will only compress the pressure contact spring 15 by pressing down the rod 14, and the throttle valve shaft 5 or 6 (holding member 12 or 12'
) does not rotate (Since the throttle valve shaft 4 of the carburetor 1 is returned by the return spring 10 with a large spring constant, in the carburetor 1 tc, even if the throttle valve does not rotate smoothly, the forced f ).

Therefore, the engine speed cannot be controlled as desired.

Fig. 3 shows an enlarged side view of only the body portion of the engaging part of an embodiment of the throttle valve shaft connection mechanism of the present invention E which has been improved so as not to cause the above-mentioned problems (see Fig. 2) The same reference numerals as in FIG.
16).

That is, the root portion 11 that abuts the connecting piece 11 has a large diameter, and the fitting portion 19 that fits into the fitting hole 18 of the engaging portion body 12 has a small diameter.

Therefore, the diameter of the large diameter portion 11 is smaller than that of the fitting hole 18, and when the rod 16 is compressed to some extent (ψ) from the connecting piece 111 and the pressure contact spring 15 is compressed at that time, the large diameter portion 17 comes into contact with the engaging part body 121 and presses it to forcibly rotate the throttle valve shaft 5.

The above-mentioned dimension α is a margin necessary for adjusting the idling of the throttle valve, and a small interval may be sufficient.

As described above, according to the improved type as shown in FIG. As long as the large diameter portion 17tt of the rod is present, the large diameter portion 17tt of the rod is forcibly returned by one position, and the unsmooth operation is immediately resolved.

[Brief explanation of the drawing]

Figure 1 is a front view of a multiple carburetor, and the connecting parts of each throttle valve shaft are shown for the conventional type, and Figure 2 shows its A.
-A sectional view and FIG. 3 are side sectional views similar to those shown in FIG. 2, followed by a side sectional view similar to FIG. 1.2,3... Carburizer, 4,5,6...
- Throttle valve shaft, 11... Throttle valve shaft connecting piece, 12...
... Throttle valve shaft engaging part body, 13... Idling adjustment screw, 14... Connecting single push rod, 15...
... Pressure spring, 16 ... Connecting single push rod.

Claims (1)

[Scope of utility model registration request] The throttle valve connecting piece 11 of the carburetor 1 is directly connected to the throttle valve operating wire 9, and the idle adjustment screw 1 is installed on both sides of the throttle valve connecting piece 11.
3 and the push rod 16 pressed by pressure f (15) are brought into contact with the throttle valve shaft engaging portion body 12 of the adjacent carburetor, and 1 is a multiple link that engages and interlocks the throttle valve shafts of both carburetors. In the carburetor 1, the push rod 16 has a two-stage T-bottom shape with an upper large diameter portion 17 and a lower diameter small portion 19, and when the push rod 16 is pressed by the throttle valve connecting piece 11, a spring 15 is applied. A throttle valve connection mechanism in a multiple carburetor, characterized in that the bottom surface of the large diameter portion 11 is brought into contact with a throttle valve shaft engaging body 12 before full compression.