JPS5814104Y2 - internal combustion engine fuel tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a fuel tank with a built-in filter, and particularly relates to a fuel tank for an internal combustion engine in which a filter is attached to the bottom of the tank due to a novel mounting structure.

Conventionally, a structure shown in FIG. 4, for example, has been used to install a filter in a fuel tank.

That is, in FIG. 4, a flange 3 is fixed to the filter 1 through its discharge pipe 2, and in this state, the filter 1 is inserted into the fuel tank through the opening 5 formed in the bottom surface 4 of the fuel tank. The filter 1 was installed in the fuel tank by attaching the flange 3 to the bolt 6 planted in the bottom surface 4 with a nut 7.

In such a conventional example, it is necessary to drill a large-diameter opening 5 in the bottom surface 4 of the fuel tank into which the filter 11 can be inserted, which reduces the strength of the fuel tank. In cases where the fuel tank is made of synthetic resin, the strength of the fuel tank decreases significantly (・
For installation, bolts must be planted in the tank bottom 4, which makes the manufacturing process complicated and increases the manufacturing cost.

The purpose of the present invention is to overcome these drawbacks of conventional fuel tanks and provide an improved fuel tank to which a filter can be easily and reliably fixed without reducing strength. .

To achieve this object, the present invention provides a fuel tank 22 for an internal combustion engine, which has an oil filling port 23 large enough to insert a filter at the top and a filter 11 at the inner surface of the bottom. 11 is fixed to the disc part of the connector 120, and screws the nut 18 from the outside of the fuel tank 22 into the straight pipe part 15 of the connector 12, which is fitted into the discharge port 25 bored in the bottom of the fuel tank 22. It is characterized in that it is fixed to the bottom inner surface of the fuel tank 22.

Hereinafter, the present invention will be specifically explained with reference to the drawings.

FIG. 1 is a cross-sectional side view showing the vicinity of a filter fixed to the bottom of a fuel tank according to an embodiment of the present invention, FIG. 2 is a perspective view of a holder, and FIG. 3 is a cross-sectional front view of the fuel tank.

1 to 3, a connector 12 is connected to the lower end of the central passage of the filter 11 by a holder 13. As shown in FIGS.

The connector 12 consists of a disc part 14 and a straight pipe part 15, and the outer periphery of the disc part 14 has a small hole into which the engaging part 16 (see FIG. 2) of the holder 13 made of two steel wires engages. The filter 11 is fixed to the upper surface of the disc part 14 by the holder 13 via a packing 17.

Further, a thread is carved on the outer periphery of the straight pipe portion 15, and a nut 18 is screwed into the thread.

19 is an O-ring, 20 is a washer, 21 is a fuel pipe connected to the lower end of the straight pipe section 15, 22 is a fuel tank, and 23 is an oil filler port provided at the top of the fuel tank 22 and large enough to insert the filter 11. , 24 is its lid, 25 is the fuel tank 22
This is a small-diameter discharge port drilled in the bottom of the machine.

When installing the filter 11, first, install the filter 11.
is fixed onto the disk portion 14 of the connector 120 by the holder 13 with the packing 17 interposed therebetween.

Then, insert this into the fuel tank 22 through the oil filler port 23 of the fuel tank 22, so that only the straight pipe portion 15 is inserted into the fuel tank 22.
By screwing and tightening the nut 18 from the outside onto the straight pipe part 15 protruding from the outlet 25 on the bottom of the bottom, the nut 18 and the disc part 14 are connected. The element 11 is attached to the bottom surface of the fuel tank 22 so that the bottom surface of the tank is sandwiched between the lower surface and the bottom surface of the tank.

At this time, by using the O-ring 19 and the washer 20 together, the connector 12 can be attached to the fuel tank 22 in an oil-tight manner.

Since the filter is installed in the fuel tank in this way, according to the present invention, it is only necessary to drill a small-diameter discharge port through which the straight pipe part passes through the bottom of the fuel tank 22. There is almost no decrease in strength.

To install the filter, insert the filter into the fuel tank through the oil filler port that is large enough to accommodate the filter.
After inserting the straight pipe part of the connector into the discharge port, all you need to do is screw the nut onto the straight pipe part from the outside and tighten it.
Its installation is easy and does not require any special processing on the fuel tank, so it can produce effects such as reducing the cost of manufacturing the tank and the cost of installing the filter. Extremely practical effects can be expected.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention, in which FIG. 1 is a sectional side view of a main part, FIG. 2 is a perspective view of a holder, and FIG. 3 is a sectional front view of a fuel tank. FIG. 4 shows a conventional example and is a sectional side view of the main part thereof. 11...Filter, 12...Connector, 13...Holder, 14...Disc part,
15... Straight pipe part, 17... Packing,
18...Natsuto, 19...O-ring,
21...Fuel pipe, 22...Fuel tank, 25...Discharge port.

Claims (1)

[Scope of utility model registration request] A fuel tank 22 for an internal combustion engine, which has an oil filling port 23 large enough to insert a filter at the top and a filter 11 at the inner surface of the bottom, the filter 11 being fixed to the disc part 14 of the connector 120. , and the nut 18 is screwed from the outside of the fuel tank 22 into the straight pipe part 15 of the connector 12 that is inserted into the discharge port 25 bored in the bottom of the fuel tank 22. Fixed internal combustion engine fuel tank.