JPH0439401Y2 - - Google Patents

Description

[Detailed description of the invention] This invention has a pump lever for operating the fuel pump of the carburetor, whose lower end is pivotally attached to the side of the main body of the carburetor, and which is linked to the operation of the pump lever. This invention relates to a pump lever device for a carburetor equipped with a Teichler arm that presses and operates a Teichler shaft.

Conventionally, in this type of pump lever device,
For example, if the engine is installed sideways, the pump lever will be pushed horizontally.
If there is an air cleaner, etc. above, it is easy to push it diagonally, and a diagonal load is applied to the pump lever, pump shaft, axis, etc. Furthermore, since the Teichler arm, which has a large load, is interlocked, a large diagonal load is placed on the pump lever. was added, causing malfunction.

The present invention has a guide plate fixed to the main body by bending the horizontal guide part that grips both sides of the upper part of the pump lever so that it can slide freely along the swinging direction. The purpose is to support the pump lever with high strength and simple structure, so that it can be operated smoothly even when subjected to diagonal loads, and malfunctions and erroneous operations can be prevented.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

In the figure, numeral 1 indicates a carburetor, which is constructed as follows. That is, 3 is an air passage, an inlet 5 at one end communicates with the atmosphere via an air cleaner 6, and an opening 7 at the other end is connected to a heat insulating intermediate body 9.
It is connected to the engine's air intake port 11 via.
13 is a throttle lever for operating a throttle valve (not shown) for opening and closing the intake port 5; and 15 is a throttle wire for operating a throttle valve for opening and closing the air passage 3. Reference numeral 19 denotes a pump lever whose distal end 19a is connected to a shaft 25 via a lid 23 on the side of the main body 21, so that it can swing laterally; It is connected to an operating shaft 27 of a fuel pump (not shown) provided therein, and the fuel pump is operated by pressing the operating portion 19c on the opposite side. Reference numeral 20 (FIG. 2) is a fuel inlet pipe provided on the lid 23 and connected to the aforementioned fuel pump.

The operating shaft 27 is provided at a position higher than the upper surface of the lid portion 23 so as to be freely protrusive and retractable.

Further, the shaft 25 is located at a distance from the operating shaft 27 and at approximately the same height as the top surface of the lid portion 23, and occupies a lower position than the operating shaft 27. Therefore,
The operating portion 19c of the pump lever 19 extends obliquely upward.

The operating portion 19c of the pump lever 19 is formed of a rectangular flat plate member, as shown in the figure.

29 is a Takeler shaft that operates a diaphragm (not shown) on the bottom of the fuel chamber (not shown) in the vaporized gas 1; 31 is a Takeler arm that presses the Takeler shaft 29; The pump lever 19 is pivotally mounted, and the other end is pressed against an operating pin 35 at the lower end of the pump lever 19 for rocking motion. Lid part 23
is attached to the main body 21 with screws 39, 39, . . . . 37 is a guide plate. The guide plate 37 and the screws 39, 39... are placed on the lid part 23 near the operating shaft 27, and together with the main body 21
It has a flat metal mounting member 38 which is fixed to the mounting member 38, and an upright member 40 which is bent upright to the mounting member 38 at a bending portion 45. The upright member 40 has a guide groove 43 that slidably holds both sides of the upper flat operating portion 19c of the pump lever 19 along the swinging direction.

The guide groove 43 is open at one end and connected to the notch 42 at the other end so as to form a groove width slightly larger than the width of the operating portion 19c. Notch portion 42
is opened near the center of the bent portion 45, and its width is wider than the width of the slit cut to form the guide groove 43. Therefore, it can be bent inward to form the guide groove 43, and the bent guide portions 41, 41 with smooth surfaces can be easily formed.

In the embodiments described above, when starting up, supplying fuel to the fuel chamber (not shown) of the carburetor through the inlet pipe 20, move the operating portion 19c of the pump lever 19 as indicated by arrow A. The guide plate 37 is supported by the bending guide portion 41 with a smooth surface, even if the operating force is obliquely operated due to interference from an air cleaner or the like. , the operation is smooth and stable.

Moreover, since the guide plate 37 is fastened together with the lid part 23, it can be easily attached to already sold engines. Furthermore, since one end of the guide groove 43 is open, the pump lever 19 can be installed by simply inserting the operating part 19c into the groove 43 from the open end.
The guiding role is accomplished, it is convenient, and the assembly is easy.

Since the present invention has the configuration as described in the claims, even if a large diagonal operating force is applied to the pump lever, the pump lever can be strongly supported and operated smoothly and stably, preventing malfunctions and It can prevent erroneous operation, has a simple structure, and is easy to install.

[Brief explanation of the drawing]

FIGS. 1 and 2 are a front view and a side view of an embodiment of the present invention, respectively, and FIG. 3 is an enlarged perspective view of the main parts. Explanation of the symbols representing the main parts of the drawing, 1...
Carburetor, 3... Air passage, 6... Air cleaner, 11... Engine intake port, 19... Pump lever, 19a... Tip, 19b... Middle part, 1
9c...Operation unit, 21...Main body, 23...Lid part,
25... shaft (for pump lever), 27... operating shaft (for fuel pump), 29... Teichler shaft, 31...
...Teichler arm, 37...Guide plate, 38...
... Mounting member, 40 ... Upright member, 41 ... Bending guide portion, 42 ... Notch portion, 43 ... Guide groove.

Claims (1)

[Claims for Utility Model Registration] A cover 23 is attached to the main body 21 of the carburetor 1, which is interposed between the air cleaner 6 and the engine intake port 11 and communicates between them through the air passage 3, with screws 39, 39...
Operating shaft 2 that presses and operates the fuel pump on the lid part 23
7 is provided at a position higher than the top surface of the lid part 23 so as to be freely retractable, a shaft 25 is provided at a position near the top surface of the lid part 23 at a distance from the operating shaft 27, and the Teichler shaft 29 is operated at the bottom of the main body 21. A Teichler arm 31 is swingably provided, and the tip 19a is attached to the shaft 25.
The intermediate portion 19b is rotatably attached to the operating shaft 27.
A pump lever 19 formed of a rectangular flat plate member that engages with the upper end and extends obliquely upward from the operating portion 19c on the opposite side is provided, and the Teichler arm 31 is provided in conjunction with the pump lever 19. In the pump lever device of a vaporizer, the screw 3 is placed on the lid 23 near the operating shaft 27.
A flat mounting member 38 that is fastened together to the main body 21 at 9, 39..., an upright member 40 formed by being bent upright on the mounting member 38, and a portion near the center of the bent portion 45 of the upright member 40. a notch 42 that opens at the bottom; and a groove width that is provided on the upright member 40 so that one end is connected to the notch 42 and the other end is open, and that slidably holds the operating part 19c of the pump lever. a guide groove 43 having a guide groove 43; bent guide portions 41, 41 bent inward to form both sides of the guide groove 43; lever device.