JPS6335769Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present application relates primarily to a fuel filter used in internal combustion engines.

As shown in FIG. 1, a conventional fuel filter 1 includes a filter element 4 disposed within a casing 3 with communicating pipes 2, 2 protruding therefrom, and elastic hoses 5, 5 connected to the communicating pipes 2, 2. It is made available for use.

When such a fuel filter 1 is used in a vehicle equipped with an internal combustion engine, the elastic hoses 5, 5 may be damaged by external force during a vehicle collision, for example.
If it is pulled, the communication pipes 2, 2 will bend and even break, causing the fuel to leak and creating a danger of a fire in the vehicle.

Therefore, in view of the above, the present application provides a fuel filter provided with a structure to prevent breakage of the communicating pipe.

To explain by way of an embodiment, FIG. 2 shows a fuel filter 10 of the present invention, which includes a body 11 and a cover 12.
A filter element 14 is disposed within a casing 13 formed by. The body 11 is cup-shaped with an open end, and the bottom wall 15 has a communication pipe 16 projecting outward in the center thereof.
A is provided. The cover 12 is made of a disk-shaped thick plate, and has a communication pipe 16b projecting outward on one side of the center thereof. An annular groove 17 is formed on the other surface of the cover 12 . body 1
The peripheral edge of the open end of the cover 12 is crimped to the outer periphery of the cover 12. The filter element 14 is made of an annular chrysanthemum-shaped folded filter paper, the upper end of which is disposed and fixed in the annular groove 17 of the cover 12, and the lower end sealed by an end plate 18.

An annular wall 19 is provided around the outer periphery of the communication pipe 16b on one side of the cover 12, and an annular chamber 20 is formed between the annular wall and the communication pipe 16b. Similarly, the communication pipe 1 on the outer surface of the bottom wall 15 of the body 11
An annular wall 21 is provided on the outer periphery of 6a to form an annular chamber 22 between it and the communication pipe 16a.

A connection hose 2 is connected to the communication pipes 16a and 16b.
3a and 23b are connected to each other, and the connection hose 23
One ends of a and 23b are inserted into the annular chambers 22 and 20, respectively. In addition, the communication pipes 16a, 16
The other end of b is connected to a fuel tank and a float bowl or an injection nozzle (none of which are shown), respectively.

The fuel flows from the communication pipe 16a to the casing 13.
The water flows through the filter element 14 and flows into the communication pipe 16b. During this time, the dust in the fuel is separated by the filter element 14.

Communication pipes 16a, 16b of fuel filter 10
When the connecting hoses 23a, 23b connected to the connecting hoses 23a, 23b are subjected to force, the communicating pipes 16a, 16b are deformed, but the annular walls 19, 21 reduce the bending moment, increasing the breakage strength of the communicating pipes 16a, 16b. let That is, when the connecting hose is subjected to a force F, as shown in FIG. As shown in FIG. 4, the bending fulcrum of the communication pipe 16b is at a position b, which is horizontal to the upper surface of the annular wall 19, and the bending moment is FB, which is smaller than the above FA. In addition, in FIG. 4, when the connecting hose 23b receives a force, the fulcrum b of the communicating pipe 16b is
Although a bending moment force acts, the tip of the connecting hose 23b inserted into the annular chamber 20 between the annular wall 19 and the communication pipe 16b buffers this force.

As described above, the fuel filter of the present invention is constructed by forming an annular chamber around the communicating pipe of the casing, attaching the connecting hose to the outer periphery of the communicating pipe, and inserting the tip of the connecting hose into the annular chamber. Therefore, it is possible to prevent the communication pipe of the fuel filter from breaking when force is applied to the connecting hose or the fuel filter itself.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional fuel filter, Fig. 2 is a sectional view of a fuel filter of the present invention, Fig. 3 is a partial sectional view of Fig. 1, and Fig. 4 is a partial sectional view of Fig. 2. be.

Claims (1)

[Scope of utility model registration request] A filter element is disposed inside a casing consisting of a cup-shaped body with an open end and a communicating pipe in the center of the bottom wall, and a disc-shaped cover with a communicating pipe in the center, and A fuel filter comprising an annular chamber, a connecting hose attached to the outer circumferential surface of a communicating pipe, and a distal end of the connecting hose inserted into the annular chamber.