JPS6240656Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fuel filter support structure for a fuel tank, and provides one that is easy to manufacture and prevents dust and the like from entering the fuel tank during fuel injection.

In the present invention, for example, as shown in FIG. 3 or FIG. The present invention relates to a fuel filter support structure for a fuel tank in which a cap 4 is fixed to the fuel inlet 2 to prevent the fuel filter 3 from being removed.

Conventionally, the above fuel filter support structure is as follows:
As shown in FIG. 5, the inlet 2 of the fuel tank 1 is raised up in an inverted U shape, and a filter support wall 6 separate from the tank body wall 50 is attached to the base end 51 of the inlet. There is a structure in which a fuel filter 3 is inserted into the inlet 2 and a ring 52 at the top of the filter is suspended from the filter support wall 6.

In order to support the fuel filter, this type requires the effort of attaching a member separate from the tank body wall to the fuel tank, which increases the number of manufacturing steps, and the fuel tank is made of surface-treated steel plate. Therefore, rust is likely to occur at the welded parts of the separate components,
Cracks and holes appear, and rust enters the carburetor.

Moreover, since the upper ring 52 of the fuel filter 3 is only suspended on the filter support wall 6, when the cap 4 is removed and oil is filled, if the fuel filter moves due to changes in the oil level, etc., the filter support wall 6 may easily move. Moreover, since the notch 8 provided in the inner wall 5 of the injection port remains open during this injection, there is a great possibility that dust and the like will enter the fuel tank.

The present invention solves the above problems, reduces the number of manufacturing steps, can be implemented at low cost, and
This was proposed for the purpose of preventing dust and the like from entering the fuel tank during fuel injection, and in order to achieve this purpose, the fuel filter support structure was constructed as shown in FIGS. It is constructed as shown in Figure 4.

That is, the periphery of the fuel inlet 2 is raised up in a cross-sectional vertical U-shape, and filter support arms 6 are integrally connected to two or more locations on the inner wall 5, and a cylindrical side wall 7 is provided above the fuel filter 3. can be received by this filter support arm 6.

Then, notches 8 are formed at two opposing locations in the inner wall 5 of the fuel inlet, and the elastic tightening legs 10 attached below the cap 4 are inserted into the notches 8. In addition, the filter side wall 7 is configured to be able to be locked with the inner wall 5 of the inlet.

To describe the effects of the present invention achieved by the above configuration, firstly, the inner wall of the fuel inlet, which stands up in an inverted U-shape in cross section, is extended in two or more places to serve as filter support arms, unlike the conventional method. Since there is no need to separately attach a member to support the fuel filter to the fuel tank, the number of manufacturing steps can be omitted, facilitating quick and inexpensive manufacturing, and is suitable for mass production.

Furthermore, since there is no need to attach a separate member, there is no possibility that, for example, the welded portion will corrode and adversely affect the fuel tank.

In addition, since the entire cylindrical side wall provided above the fuel filter is in close contact with the inner wall of the fuel inlet, the large contact area allows for more reliable positioning, and the fuel filter can be easily adjusted due to changes in the oil level or rise in the oil level. Even if an attempt is made to swing or float, it is possible to prevent a gap from forming between the fuel filter and the inner wall of the inlet.

Therefore, when injecting fuel, it is possible to prevent dust and the like from entering the tank from the outside and to smoothly supply fuel to the carburetor.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 1 is a front view of a vertical forced air-cooled engine with a recoil starter, Figure 2 is a plan view of the fuel tank,
FIG. 3 is a longitudinal sectional front view of the vicinity of the fuel injection port, and FIG. 4 is an exploded perspective view thereof. The fan case 12 and recoil case 13 are sequentially attached to the front of the engine E, and the cooling fan interlocked with the crankshaft is attached to the fan case 12 and the recoil case 13 in order. It is housed in a case 12, and the cooling fan and recoil starter are interlocked and connected via a transmission pulley.

The cooling air ventilated by the cooling fan is
The outside air is taken in from the outside air intake port 14 formed in the side wall of the recoil case, is blown onto the engine cylinders while being guided by the fan case 12, and is discharged to the back of the engine.

Then, a tank stay 15 having three members fixed thereto is screwed onto the engine cylinder, and the fuel tank 1 is welded to the tank stay 15.

The fuel tank 1 is made into a flat substantially rectangular parallelepiped,
A fuel inlet 2 is provided at the center of the top, and an oil gauge insertion port 19 is provided at the side of the top.

In addition, the fuel injection port 2 is as shown in FIG.
A tank main body wall 16 is raised up to have an inverted U-shaped cross section to form a circumferential shape, and a fuel filter 3 is suspended inside the tank body wall 16, which is closed with a cap 4.

That is, a dogleg-shaped filter support arm 6 is formed by integrally protruding two opposing parts of the inner wall 5 of the fuel inlet 5 downward, and a U-shaped notch is formed at an opposing position rotated approximately 90 degrees from the filter support arm. 8 is cut out to provide a guide part 17 that becomes deeper as it goes to the right from the notch part 8, and the right end of the guide part 17 is made into a stop part 18, and a part of the upper end wall 20 of the inlet corresponding to the notch part is cut out to provide a guide part 17 for inserting the cap. It is assumed to be a guide hole 21.

On the other hand, the fuel filter 3 is composed of an upper side wall 7 and a lower net-like part 22, and the side wall 7 is formed by connecting a lower constricted receiving part 7b to the cylindrical part 7a, and the upper end edge of the cylindrical part 7a is A pair of notches 23 are cut out at opposing positions.

In addition, the cap 4 has a flat cap-shaped cap main body 24 with a trapezoidal bulge 25 attached to the bulge 25.
It is constructed by fixing an elastic plate-shaped tightening leg 10 to 5.

Therefore, the fuel filter 3 and cap 4
To explain how to assemble the fuel filter 3 to the fuel inlet 2, first insert the fuel filter 3 along the inner wall 5 of the fuel inlet, and attach the cylindrical part 7a and the receiving part 7b above the fuel filter to the dogleg-shaped filter support arm. 6, and the notch 23 formed in the side part 7 of the filter is overlapped with the notch 8 formed in the inner wall 5 of the inlet.

Then, the cap 4 is fitted onto the fuel inlet 2 while aligning the tightening leg 10 with the guide hole 21 formed in the upper end wall 20 of the inlet, and the tightening leg 10 is fitted into the notch 8 through the guide hole 21. After that, the entire cap is rotated to the right, and the clamping leg 10 is brought into partial contact with the stop part 18 while along the guide part 17 of the inner wall of the inlet, and the upper surface of the clamping leg is pressed against the lower edge 11 of the inner wall of the inlet. Then, the tightening operation of the cap 4 to the injection port 2 is completed.

The fuel filter support structure constructed in this manner has the filter support wall 6 integrated with the fuel tank 1 to facilitate manufacturing, but the number of continuous filter support walls is two as in the above embodiment. However, the present invention is not limited to this, and three or more filters may be placed in a row at positions where they can be supported.

Further, the shape of the filter support wall is not limited to the one bent in a dogleg shape as in the above embodiment, but may be one in which the tip is curled as long as it can support the fuel filter.

[Brief explanation of the drawing]

1 to 4 show an embodiment of the present invention, in which FIG. 1 is a front view of a vertical forced air-cooled engine with a recoil starter, FIG. 2 is a plan view of a fuel tank, and FIG.
4 is an exploded perspective view thereof, and FIG. 5 is a view corresponding to FIG. 3 showing a conventional example. 1... Fuel tank, 2... Fuel inlet, 3...
Fuel filter, 4...cap, 5...inner wall of 2, 6...filter support arm, 7...side wall of 3,
8...Notch part of 5, 10...4 tightening leg, 11...
...lower edge of 5.

Claims (1)

[Scope of utility model registration request] A fuel tank 1 is mounted on the upper part of the engine E, a fuel filter 3 is suspended inside the tank from a fuel inlet 2 opened above the fuel tank 1, and a cap 4 is fixed to the fuel inlet 2. 3
In the fuel filter support structure of the fuel tank which is made impossible to extract, the periphery of the fuel inlet 2 is raised up into a U-shaped section, and filter support arms 6 are integrally connected downward at two or more locations on the inner wall 5. A cylindrical side wall 7 provided above the fuel filter 3 is configured to be able to be received by the filter support arm 6, and cutouts 8 are formed at two locations on the fuel inlet inner wall 5, and attached below the cap 4. An elastic tightening leg 10 is inserted into the notch 8 and configured to be able to be locked at the lower end edge 11 of the inner wall 5 of the inlet, and the filter side wall 7
A fuel filter support structure for a fuel tank, characterized in that the fuel filter is brought into close contact with an inner wall 5 of an inlet.