JP7286448B2 - filter device - Google Patents

Description

The technology disclosed in this specification relates to a filter device used in a fuel supply system or the like.

Fuel is supplied to a vehicle engine by pumping fuel from a fuel tank with a fuel pump. A filter device is provided at the fuel suction port of the fuel pump to filter dust and the like in the fuel. (See Patent Document 1)

As shown in FIGS. 4 and 5, the filter device includes a bag-shaped filter element FE having an opening, bone members BO supporting the filter element FE from the inside to maintain the bag shape, and opening edges of the filter element FE. and a body member BD sandwiched between the bone member BO. A fuel pump (not shown) is connected to the body member BD.

In the portion where the opening edge EN of the filter element FE is sandwiched between the body member BD and the bone member BO, the body member BD and the bone member BO are strongly fastened to secure the sealing performance, and the opening edge of the filter element FE is secured. The portion EN is compressed in the plate thickness direction of the filter element FE.

JP 2009-62912 A

The clamping portion of the body member BD has an extension FL extending along the surface of the filter element FE. Therefore, the extended portion FL is easily deformed in the thickness direction of the filter element FE (the arrow direction in FIG. 5). The extended portion FL of the body member BD receives the reaction force in the direction of the arrow in FIG. 5 due to the compression of the opening edge EN of the filter element FE, and the extended portion FL of the body member BD may be deformed in the same direction. When such deformation occurs, the opening edge EN of the filter element FE is not sufficiently compressed, making it difficult to ensure sealing performance at the opening edge EN of the filter element FE.

An object of the technology disclosed in the present specification is to provide a filter device configured by sandwiching the end of a filter element between two members, in which the reaction force accompanying compression of the end of the filter element is inclined with respect to the direction of compression by the two members. It is to generate in the direction.

In order to solve the above problems, the filter device disclosed in this specification employs the following means.

The first means consists of a filter element for filtering substances to be filtered such as dust contained in the fluid, and a clean side on which the substances to be filtered are filtered by the filter element and the fluid is not filtered. a body member provided at the end of the filter element so as to isolate it from the fluid on the dirty side; and a body member provided opposite to the body member. a clamping body for isolating the space on both sides separated by the filter element into a clean side and a dirty side; clamping means for clamping the filter element between the body member and the clamping body, and the sandwiching surfaces sandwiching the filter element in the body member and the sandwiching body are flat surfaces facing each other, and are inclined with respect to the direction in which the filter element is pressed by the fastening means It is considered to be a sloped surface.

According to the first means, the holding surfaces of the body member and the holding body are inclined with respect to the pressing direction of the fastening means. The reaction force due to the compression of the filter element is perpendicular to the clamping surface and inclined to the pressurizing direction. Therefore, even if at least one of the body member and the clamping body has a shape that is easily deformed in the pressing direction, the reaction force is in a direction inclined in the pressing direction, and deformation of at least one of the body member and the clamping body does not occur. Suppressed. Therefore, the pressure applied to the end of the filter element on the clamping surface is maintained, and the sealing performance at the end of the filter element is ensured.

A second means is the above-described first means, wherein at least one of the body member and the clamping body facing each other across the filter element has an extension portion extending in a flange shape along the surface of the filter element. and each of the holding surfaces is provided at a portion where the filter element is held between the body member including the extending portion and the holding member.

According to the second means, at least one of the body member and the clamp has an extension extending along the surface of the filter element. Therefore, when receiving a reaction force from the end of the filter element in a direction opposite to the direction of pressure applied by the fastening means, the extending portion is likely to deform. On the other hand, if the reaction force is received in a direction inclined with respect to the pressurizing direction as described above, deformation of the extending portion is suppressed even when the extending portion is provided.

A third means is the above-described second means, wherein the extending portion is provided on the body member and has a disk shape, and the holding member has an annular projection corresponding to the disk shape of the extending portion. , the holding surfaces are provided in an annular shape on opposing surfaces of the annular protrusion and the extending portion, and each of the holding surfaces is an inclined surface in which the outer peripheral side is inclined toward the annular protrusion side with respect to the inner peripheral side of the ring. ing.

According to the third means, the reaction force received by the end of the filter element from the end of the filter element to the clamping surface formed on the disk-shaped extended portion of the body member is a force having a vector component directed radially outward of the disk-shaped body member. becomes. Therefore, the deformation of the extended portion due to the reaction force is further suppressed.

It is a longitudinal section showing a 1st embodiment. FIG. 2 is an enlarged view of part II in FIG. 1; It is an enlarged view corresponding to FIG. 2 which shows 2nd Embodiment. It is a partial vertical cross-sectional view showing a conventional example. FIG. 5 is an enlarged view of a V portion in FIG. 4;

<Overall Configuration of First Embodiment>
1 and 2 show a first embodiment of a filter device. The first embodiment is an example of a fuel filter device for a vehicle engine. This filter device comprises a filter element 10, and a body member 20 and a bone member 30, which are two members that hold an opening edge 10b of the filter element 10 between them. In the following description, it is assumed that the filter device is placed in the state shown in FIG. 1, and the directions are described based on each direction such as up and down, left and right in the drawing. The same applies to figures other than FIG.

The filter element 10 has a bag-like shape with one opening 10a, and filters substances to be filtered such as dust contained in fuel, which is a fluid. The filter element 10 is made of nonwoven fabric, mesh material, filter paper, knitted fabric, or the like. Further, the body member 20 separates the fuel on the clean side C, which is the side where the substances to be filtered are filtered by the filter element 10, from the fuel on the dirty side D, which is the side on which the filter element 10 is not filtered. It is provided at the opening edge 10b. A fuel pump (not shown) is connected to the clean side C of the body member 20 .

The bone member 30 is provided so as to face the body member 20 with the opening edge 10b of the filter element 10 interposed therebetween. The separated spaces on both sides are separated into a clean side C and a dirty side D. The bone member 30 is annularly formed corresponding to the opening 10a of the filter element, and includes a frame 31 arranged inside the bag shape of the filter element 10 along the inner surface around the opening 10a. Both the bone member 30 and the body member 20 are made of resin.

The body member 20 has a columnar connecting portion 22 to which the suction port of the fuel pump is connected. An extending portion 23 extending in a flange shape along the surface of the filter element 10 so as to cover the entire opening 10a including the opening edge 10b of the filter element 10 from above is provided at the lower portion of the outer periphery of the connecting portion 22 . The extending portion 23 has a generally disc shape, and integrally has a fastening portion 23 c protruding annularly from the lower surface thereof so as to correspond to the inner peripheral side of the annular bone member 30 . The outer peripheral surface of the fastening portion 23c is in contact with the inner peripheral surface of the annular protrusion 34 of the bone member 30, and the two are coupled by screws (corresponding to fastening means) 40. As shown in FIG. Therefore, by relatively rotating the fastening portion 23c and the annular protrusion 34 around the opening 10a, the body member 20 and the bone member 30 can be fastened with the opening edge portion 10b of the filter element 10 sandwiched therebetween.

<Structure and Action of Holding Surface>
A sandwiching portion 23a protrudes from the lower surface of the extended portion 23 of the body member 20, facing the upper surface of the annular protrusion 34 of the bone member 30, on the outer peripheral side of the fastening portion 23c. Holding surfaces 23b and 34a for holding the opening edge 10b of the filter element 10 are formed on opposing surfaces of the holding portion 23a and the annular projection 34. As shown in FIG. The clamping surfaces 23b and 34a are planes parallel to each other, and are inclined with respect to the direction in which the filter element 10 is pressed by fastening the screw 40 (direction of arrow A). The holding surfaces 23b and 34a are formed in an annular shape, and are inclined surfaces in which the outer peripheral side is lowered (inclined toward the annular projection 34 side) with respect to the inner peripheral side of the annular shape. In this case, the inclination angle is about 45 degrees with respect to the horizontal line.

Since the clamping surfaces 23b and 34a are inclined as described above, the reaction force generated when the opening edge 10b of the filter element 10 is pressurized is clamped as indicated by the arrow B in FIG. The direction is perpendicular to the surfaces 23b and 34a. This direction is inclined with respect to the deformation direction H of the extending portion 23 of the body member 20. When the extending portion 23 is deformed by the reaction force in the direction of arrow B, the reaction force coincides with the deformation direction H of the extending portion 23. is suppressed compared to the prior art that Moreover, the reaction force received by the extending portion 23 is a force having a vector component (indicated by arrow F in FIG. 2) directed outward in the radial direction of the disk shape of the extending portion 23 . Therefore, the deformation of the extended portion due to the reaction force is further suppressed. Therefore, the pressure applied to the opening edge 10b of the filter element 10 by the clamping surfaces 23b and 34a is maintained, and the sealing performance at the opening edge 10b of the filter element 10 is ensured.

<Second embodiment>
FIG. 3 shows a second embodiment of the filter device. A feature of the second embodiment as compared with the first embodiment is that the direction of inclination of the holding surfaces 123b and 134a is changed from the direction of inclination of the holding surfaces 23b and 34a in the first embodiment. The rest of the configuration is the same for both, and the re-explanation of the same parts will be omitted.

In the first embodiment, the holding surfaces 23b and 34a are sloped surfaces with the outer peripheral side lowered with respect to the inner peripheral side of the ring, whereas the holding surfaces of the holding portion 123a (extending portion 123) in the second embodiment are inclined. The sandwiching surface 134a of the 123b and the annular protrusion 134 is an inclined surface in which the outer peripheral side is raised with respect to the inner peripheral side of the ring. Even with this inclined surface, the reaction force generated when the opening edge 10b of the filter element 10 is pressurized is in the direction perpendicular to the clamping surfaces 123b and 134a as indicated by arrow E in FIG. This direction is inclined with respect to the deformation direction H of the extending portion 123 of the body member 20, and the deformation of the extending portion 123 due to the reaction force in the arrow E direction is suppressed as compared with the conventional technology.

<Other embodiments>
Although the technology disclosed in this specification has been described above with respect to specific embodiments, it can be implemented in various other forms. For example, although the filter device is a fuel filter device for a vehicle engine, it can be applied to filter devices for various other uses. For filter devices for other applications, the filter element is not limited to a bag shape. In the above embodiment, the holding member for holding the opening edge 10b of the filter element 10 is composed of the bone member 30, but it may be constituted by a holding member specially provided for holding the end of the filter element.

In the above-described embodiment, the fastening means is configured by the screw 40, but instead of the connection by the screw 40, it may be connected by press fitting. Also, the fastening means may be configured by a separate member such as a clamp member. In the above-described embodiment, the screw 40 as the fastening means is provided on the inner peripheral side of the extending portion 23 from the clamping surfaces 23b and 34a, but the fastening means is provided on the outer peripheral side of the extending portion 23 from the clamping surfaces 23b and 34a. good too.

In the above embodiment, the clamping surfaces 23b and 34a are planes parallel to each other, but the clamping surfaces 23b and 34a do not necessarily have to be parallel as long as they are planes facing each other. In the above embodiment, the angle of inclination of the clamping surfaces 23b and 34a is about 45 degrees with respect to the horizontal line. Any angle can be set as long as the direction of the reaction force is inclined with respect to the pressing direction.

10 Filter element 10a Opening 10b Opening edge (terminal)
20 body member 22 connecting portions 23, 123 extending portions 23a, 123a holding portions 23b, 123b holding surface (inclined surface)
23c fastening portion 30 bone member (clamping body)
31 Frames 34, 134 Annular protrusions 34a, 134a Holding surface (inclined surface)
40 screws (fastening means)
C clean side D dirty side

Claims (4)

a filter element for filtering substances to be filtered such as dust contained in the fluid;
a body member provided at the end of the filter element so as to isolate the fluid on the clean side where the substances to be filtered are filtered by the filter element from the fluid on the dirty side where the filter element is not filtered;
a sandwiching body provided opposite to the body member, sandwiching the end of the filter element between itself and the body member to separate the space on both sides separated by the filter element into a clean side and a dirty side;
fastening means for fastening the body member and the clamping body to each other so that the end of the filter element is pressed and clamped by the body member and the clamping body;
The sandwiching surfaces sandwiching the filter element in the body member and the sandwiching body are flat surfaces facing each other , and are annularly formed along the end of the filter element. The holding surface of the body member protrudes from the holding surface of the holding body and is inclined, or the holding surface of the holding body protrudes from the holding surface of the body member on the outer peripheral side with respect to the inner peripheral side of the ring. A filter device with a slanted slanted surface. a filter element for filtering substances to be filtered such as dust contained in the fluid;
a body member provided at the end of the filter element so as to isolate the fluid on the clean side where the substances to be filtered are filtered by the filter element from the fluid on the dirty side where the filter element is not filtered;
a sandwiching body provided opposite to the body member, sandwiching the end of the filter element between itself and the body member to separate the space on both sides separated by the filter element into a clean side and a dirty side;
fastening means for fastening the body member and the clamping body to each other so that the end of the filter element is pressed and clamped by the body member and the clamping body;
The sandwiching surfaces sandwiching the filter element in the body member and the sandwiching body are flat surfaces facing each other, and are inclined with respect to the direction in which the filter element is pressed by the fastening means. The reaction force generated on each of the clamping surfaces due to the pressurization due to the fastening of the means is directed in one direction inclined with respect to the pressurizing direction.
filter device. In claim 1 or 2 ,
At least one of the body member and the clamping body facing each other with the filter element therebetween has an extending portion extending in a flange shape along the surface of the filter element,
Each of the holding surfaces is provided at a portion of the body member including the extending portion and the holding body that sandwiches the filter element. In claim 3 ,
the extending portion is provided in the body member and has a disc shape,
The clamping body has an annular protrusion corresponding to the disk shape of the extending portion,
Each holding surface is annularly provided on the opposing surface of the annular protrusion and the extending portion,
Each of the holding surfaces is an inclined surface in which an outer peripheral side is inclined toward the annular projection side with respect to an annular inner peripheral side.

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