JPH025849Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present application relates to a filter for passing fluid such as lubricating oil of an internal combustion engine.

Conventional filters, for example transmission filters, have a flange 1 on the outer periphery as shown in Figure 1.
A structure in which a over-element 7 is arranged between the upper and lower cases 5 and 6 having openings 3 and 4, and the flanges 1a and 2a of the upper and lower cases 5 and 6 are welded to integrate them. belongs to.

The fluid flows into the opening 4 of the lower case 6, flows through the filter element 7, and flows out to the opening 3 of the upper case 5. While flowing through the filtration element 7, the fluid is filtrated.

A filter with such a conventional structure has the following drawbacks. That is, the facing flanges 1a and 2a of the upper and lower cases 5 and 6 are welded, for example, by vibration welding, but in this case, melt burrs are formed, which are separated as the fluid flows and mixed into the liquid. It's a matter of putting it away. Furthermore, the connection between the flanges 1a and 2a is as follows:
The reality is that liquid-tightness cannot be ensured with anything other than a welded structure.

Therefore, the present application maintains the welded structure,
The purpose of this is to provide a filter with a structure that does not cause the above-mentioned problems, and a filter element is sandwiched between upper and lower cases made of synthetic resin with a flange on the outer periphery, and the outer periphery of the flange is made of the same resin as above. This objective has been achieved by a filter having a structure in which a sealing portion is provided, the outer periphery of the over-element is embedded within the sealing portion, and each flange is integrated.

To explain by way of an example, FIG. 2 shows a filter of the present invention, which includes a synthetic resin lower case 13 having an inlet 11 and a flange 12 on the outer periphery, and a lower case 13 made of synthetic resin and having an outlet 14 and a flange 15 on the outer periphery. An upper case 16 made of synthetic resin is provided with an upper case 16 to form a housing therein, and an over-element 17 is disposed within the housing. The pass element 17 is made of wire mesh, non-woven fabric, etc., and its outer periphery is held between the flanges 15 and 12 of the upper and lower cases 16 and 13, and the tip 18 projects outward from the outer periphery of the flanges 15 and 12. A notch 19 is provided at the bottom of the outer periphery of the flanges 15, 12. Both flanges 15 abut against each other across the over-element 17,
A sealing part 20 made of the same synthetic resin material as the upper and lower cases 16, 13 is provided on the outer periphery of 12, and the tip 18 of the outer periphery of the element is embedded in the sealing part, and the flanges 15, 1 of the upper and lower cases 16, 13
Integrate 2.

As shown in FIG. 3, such a sealing part 20 is constructed by placing a filter assembly in which a filter element 17 is sandwiched between upper and lower cases 16 and 13 between molds 21 and 21 that form a recess 22, and molding the filter assembly. It can be easily obtained by a manufacturing method in which the synthetic resin is injected into a mold.

The synthetic resin that is heated and melted is placed in the upper and lower cases 1.
The surfaces of the synthetic resins on the outer peripheries of the flanges 15, 12 of 6, 13 are softened and melted, and both synthetic resins are integrated.

FIG. 4 shows another embodiment, in which the flanges 15', 1 of the upper and lower cases 16', 13'
2' is not in contact with the over element 1.
7' and each flange 15', 12' with gaps 23, 2
This is a filter in which 4 is formed.

In the filter shown in FIG. 2, fluid flows in from the inlet 11 of the lower case 13, and
7 and flows out to the outlet 14 of the upper case 16. Flanges 15, 12 of upper and lower cases 16, 13
The space between the filters is not welded and fluid may enter therebetween, but the outer peripheries of the flanges 15 and 12 are sealed by the sealing portion 20, and the fluid does not flow out of the filter. The flanges 15 and 12 of the upper and lower cases 16 and 13 are not welded together and have no melted burrs on their surfaces. Therefore, the melted burrs will not be peeled off and mixed into the liquid due to the flow of the fluid.

In the embodiment of FIG. 4, the fluid is supplied to the upper and lower cases 16',
13' flows into the gaps 23, 24 between the flanges 15', 12' and the filter element 17', and the filter element 1 located between the flanges 15', 12'
7'a is distributed.

As described above, the filter of the present invention has an over-element sandwiched between the flanges of the upper and lower cases made of synthetic resin, a sealing part made of the same synthetic resin as the upper and lower cases is welded to the outer periphery of the flange, and the outer periphery of the over-element is buried within the sealing part. This structure prevents welding burrs from forming between the two flanges and contaminating the liquid.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional filter, FIG. 2 is a sectional view of a filter according to the present invention, and FIG. 3 is a diagram showing a mode of manufacturing the filter according to the present invention. FIG. 4 is a sectional view showing another embodiment. 12...Flange, 13...Lower case, 15...
...Flange, 16... Upper case, 20... Sealing part.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) Each flange of the synthetic resin lower case having an inlet and a flange on the outer periphery, and the upper synthetic resin case having an outlet and a flange on the outer periphery. A filter in which a filter element is disposed in between, a sealing part made of the same synthetic resin as the case is welded to the outer periphery of each flange, and the outer periphery of the filter element is embedded in the sealing part. (2) The filter according to item 1 above, which has upper and lower cases with cutouts provided at the bottom of the outer periphery of the flange. (3) The filter according to item 1 above, wherein a gap is provided between the outer periphery of the upper and lower cases and the filter element.