JP3304204B2 - Filter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter, particularly to a filter suitably used as an oil filter or a fuel filter for an internal combustion engine.

[0002]

2. Description of the Related Art Conventionally, for example, as a filter for an internal combustion engine, a filter element which is housed and mounted in a filter body which forms part of an internal combustion engine or is fixed to a part of the internal combustion engine is used. Although it is known, it is an integrated filter in which the filter element is housed in the filter body in advance in view of the fact that the filter element is not easily attached and detached, and the filter body is partially attached to the internal combustion engine or the like. A so-called cartridge type filter which can be attached and detached is used.

[0003]

However, most of the cartridge type filters are composed of different types of materials such as a filter element having a filter paper or the like as a main component and a metal filter body. The filter element and filter body made of these different materials are integrated and manufactured, which is economically unfavorable because it is assumed to be disposable. It is difficult to disassemble after use and difficult to separate because it is difficult to dispose of. Was occurring.

[0004] The present invention is an improvement on the above-mentioned conventional cartridge type filter, in which the filter body can be attached to and detached from a part or other mounting portion of the internal combustion engine. Only the filter element can be separated from the filter body, and only the filter element is replaced so that the filter body can be reused as it is. It is another object of the present invention to easily and reliably perform both attachment and detachment of the filter to and from the attachment portion of the filter and attachment and detachment of the filtration element to and from the filter main body. It is another object of the present invention to provide a filter that is easily exposed to high temperatures with a cooling effect.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a substantially cylindrical filter having a fluid inlet and a fluid outlet at the bottom of a mounting side end, which is one end of a filter body, and a screw portion for mounting the filter. A filter body, a filtration element housed in the filter body, and a cover screwed to a cover-side end which is the other end of the filter body; a cover-side end of the filter body On the outer periphery of the tool so that the tool can rotate while holding the lid side end.
The lid body is formed on the filter body such that the outermost peripheral portion is located inside the first tool receiving portion formed on the outer periphery of the lid side end of the filter body. At the center of the upper surface of the lid, a square head for receiving a tool is formed, and a tool is rotatable on the outer periphery of the mounting side end of the filter body while holding the mounting side end. Thus, a filter formed with a second tool receiving portion.

[0006]

When the already assembled filter is to be attached to or detached from the mounting portion, the first filter formed on the outer periphery of the lid side end of the filter main body.
A tool is applied to the tool receiving portion, and the lid-side end is held and rotated, so that the filter is attached to the mounting portion at the screw portion at the bottom of the mounting-side end, which is one end of the filter body. The lid is screwed to the filter body such that the outer peripheral portion is located inside the first tool receiving portion formed on the outer periphery of the lid side end of the filter main body. There is no hindrance when the tool is applied to the receiving part.

[0007] When assembling and disassembling the filter, that is, when attaching and detaching the lid and the filter body in order to attach and detach the filter element to and from the filter body, a square head for receiving a tool formed at the center of the upper surface of the lid. By applying a tool to the portion and applying a tool to a second tool receiving portion formed on the outer periphery of the mounting side end of the filter body, holding and rotating both, the lid and the filter body are separated. Can be detached. In this case, if there is no second tool receiving portion formed on the outer periphery of the attachment side end of the filter main body, the first tool receiving portion formed on the outer periphery of the lid side end of the filter main body is held and held. The first tool receiving portion needs to be held by a vice or another tool, which makes the attaching / detaching work complicated and unreliable. On the other hand, in the present invention, at each end of the filter main body, a tool such as a cap wrench can be applied and detached,
The attachment and detachment of the lid and the filter body are easily and reliably performed.

[0008] By forming the second tool receiving portion to a size suitable for the tool used for the first tool receiving portion,
A different kind of tool is not required, and the lid can be attached and detached using the same tool as that for attaching and detaching the filter body.

[0009] The first tool receiving portion is usually formed so as to conform to the contour of a regular polygon. It has the same shape as the square part of the bolt or nut, and does not require special tools.
Tools such as wrench and spanner can be used, and the range of tool selection is expanded. To match the contour of a regular polygon is meant to include not only a perfect regular polygon but also one having an intermittent portion or a straight or curved portion depressed inside on the contour line (for example, a side portion) of the regular polygon. It is.

When the tool used for the first tool receiving portion and the second tool receiving portion is a cap wrench, attachment and detachment of the lid and the filter main body are particularly easy.

[0011] By forming a plurality of fins on the outer peripheral side surface of the filter body, a cooling effect can be imparted to the filter which tends to become high in temperature.

By forming the tip surfaces of the plurality of fins at the same height as the outer peripheral surface of the first tool receiving portion, the protrusion of the fins to the filter body can be suppressed, and the cooling effect can be exhibited. The size of the filter can be reduced.
Also, the design of the filter body becomes easy.

By forming the second tool receiving portion with a fin, the fin has a cooling effect when used, and a tool is attached to the fin portion when the lid and the filter main body are attached and detached. It is possible to achieve the effect that the cover can be attached to and detached from the filter body.

A plurality of fins are formed in the height direction of the filter body, are formed at a height corresponding to the outer peripheral surface of the first tool receiving portion, and a second tool receiving portion is formed by the plurality of fins. By doing so, the protrusion of the fin with respect to the filter body can be suppressed as much as possible, and the size of the filter can be reduced.The fin has a cooling effect when used, and when the lid and the filter body are attached and detached, A tool is applied to this fin portion, and in addition to the effect of attaching and detaching the lid and the filter main body, the attachment and detachment of the lid and the filter main body are limited only to the mounting side end of the filter main body. Instead, a tool can be applied in a wide area up to the lid-side end in the height direction of the filter body. Therefore, the range of tool selection is expanded, and the present invention can be applied not only to a cap wrench but also to a tool such as an eyeglass wrench.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a side sectional view of one side of a filter 1 according to an embodiment of the present invention, FIG. 2 is a plan view, and FIG. 3 is a bottom view.

The filter 1 comprises a substantially cylindrical filter body 11 made of metal and a metal cover 21 screwed to the end on the cover side.
And a filtration element 31 housed in the filter body 11
Consists of A fluid inlet 12, an outlet 13, and a thread 14 for mounting the filter formed on the inner surface of the outlet 13 are formed at the bottom of the attachment side end, which is one end of the filter body 11. I have.

The outer periphery of the lid side end of the filter main body 11 is formed in a regular polygon and forms a first tool receiving portion 15,
A tool such as a cap wrench is applied to the first tool receiving portion 15 and can be held.

A plurality of fins 16 are formed on the outer peripheral side surface of the filter main body 11 in the height direction. The tip surfaces 16a of the plurality of fins 16 are formed in a regular polygon of the first tool receiving portion 15. The surface is formed at a height that coincides with the side surface.

The plurality of fins 16 extend to the mounting-side end of the filter body 11 and terminate in a tapered shape.
As described above, the plurality of fins 16 have their tip surfaces 16a.
Are formed at the same height as the surface forming the side of the regular polygon of the first tool receiving portion 15 and the filter body 11
The fin 16 forms a second tool receiving portion 17 at the mounting end of the filter main body 11. The outer diameter of the second tool receiving portion 17 is suitable for the tool used for the first tool receiving portion 15, and a tool such as a cap wrench used for the first tool receiving portion 15 can be used similarly. It has become.

In this embodiment, the plurality of fins 16 are
Is formed so as to be continuous with the side of the regular polygon of the tool receiving portion 15, but it is not necessarily required to be continuous. Further, although formed in the height direction of the filter main body 11, it may be formed in the circumferential direction of the filter main body 11. The second tool receiving portion 17 may not be formed by the plurality of fins 16 but may be formed to be, for example, a regular polygon.

The lid 21 is screwed to the filter body such that the outermost peripheral portion 22 is located inside the first tool receiving portion 15 formed on the outer periphery of the lid side end of the filter body 11. ing. A square head 23 for receiving a tool is formed in the center of the upper surface of the lid. The corner head 23 is, as shown in FIG.
Is preferably provided in the center of a concave upper surface. By making the height of the square head 23 sufficiently large, the tool can be set securely, and projection of the lid 21 from the upper end face line can be avoided as much as possible, so that the filter can be downsized, There is no particular problem when a tool (cap wrench) is applied to the first tool receiving portion 15 formed on the outer periphery of the lid side end of the filter main body 11.

The filter element 31 accommodated in the filter body 11 includes a filter section 32 formed by bending filter paper or the like into, for example, a chrysanthemum flower shape, an upper end plate 33 and a lower end plate 34 for closing the upper and lower end surfaces of the filter section 32. And perforated inner cylinder 35
The fluid flows in through a plurality of inlets 12 formed at the bottom of the end of the filter body 11 on the mounting side, and flows out through a central outlet 13. It is screwed to a mounting portion at a filter mounting screw portion 14 formed at the outlet 13.

A check valve 36 made of synthetic rubber and formed of silicon rubber or the like located above the inflow port 12 has a function of preventing backflow of a fluid and sealing off the inflow path and the outflow path. Reference numeral 37 denotes a gasket made of heat and oil resistant rubber, reference numeral 38 denotes a spring for pressing and holding the filtering element by the lid 21, reference numeral 39 denotes a washer, and reference numeral 40 denotes a seal between the filter body 11 and the lid 21. O-ring.

In the seed filtration element 31, the upper end plate 33, the lower end plate 34, and the porous inner cylinder 35 for closing the upper and lower end surfaces of the filtration section 32 are conventionally made of metal. Filtration unit 32
There was a problem with the disposal of the filtration element integrated with (it is difficult to disassemble and difficult to separate),
By constituting each member of the upper end plate 33, the lower end plate 34, and the porous inner cylinder 35 with paper or a synthetic resin that can be disposed of as a combustible material, disassembly and separation are not required, and when the filtration element is disposed. Can be solved.

A metal relief valve unit 43 is provided above the center of the filtration element 31. When the filtration pressure increases, the valve body 44 is pushed down. If the relief valve unit 43, which was conventionally integrated with the filtration element, can be separated from the filtration element 31 with one touch, the disassembly becomes easy, and at the time of disposal, the separation process between the relief valve and the filtration element can be performed. It will be easy to do.

FIG. 4 shows an example in which the filtering element 31 is improved from the above viewpoint. In this example, the upper end plate 33b and the lower end plate 34b that close the upper and lower end surfaces of the filtration unit 32 and the porous inner cylinder 35b are made of a heat-resistant polyamide resin, a heat-resistant polyurethane resin, or another heat-resistant synthetic resin. It is integrally molded with the filtering part 32 bent in a chrysanthemum shape.

In the upper part of the filtration part 32, the relief valve unit 43 is not fixed and integrated with the filtration element but is formed separately, and is formed on the upper end plate 33b and the valve seat part 43a of the relief valve unit 43. The V-shaped edge portion 43c formed on the lower surface of the fixed ring-shaped portion 43b abuts or cuts in, closing and sealing the fluid filtration passage in the upper portion of the filtration portion 32. A gasket may be interposed instead of or in addition to the V-shaped edge portion 43c for closing and sealing the filtration passage. The inner peripheral side of the ring-shaped portion 43b locks the valve body 44. The rising portion 43d of the ring-shaped portion 43b of the relief valve unit 43 is designed to fit into the inner peripheral portion of the upper end plate 33b. Therefore, the mounting of the relief valve unit 43 to the filtration element 31 is easy, and the relief valve unit 43 can be separated from the filtration element 31 with one touch, and the relief valve unit 43 can be reused. Further, there is no need to use a metal end plate at the upper part of the filtration unit 32, so that disassembly and separation at the time of disposal are not required, and problems at the time of disposal of the filter element can be solved.

A check valve 36b made of synthetic rubber is provided below the filtration section 32. Unlike the one shown in FIG.
There is no metal lower end plate. This check valve 36b is formed to be thicker than that shown in FIG. 1, is fitted to the outer peripheral side wall portion 13a of the outlet 13, and has a concave portion (in the upper outer side wall of the check valve 36b). Or step)
An inner peripheral portion of the lower end plate 34b is engaged with the concave portion 36c, and is located between the inflow port 12 and the outflow port 13 so as to separate the inflow path and the outflow path from each other. are doing. Therefore, it is advantageous in that there is no need to use a metal end plate in the lower part of the filtration part 32, as in the case of the upper part of the filtration part 32 described above.

FIG. 5 shows the filter element in the example shown in FIG. 4 (which can also be applied to the one shown in FIG. 1).
As a member for pressing and holding according to 1, a blade-shaped leaf spring 38b shown in FIG. 6 is used without using a coil spring as a separate member, and this leaf spring 38b is a valve seat of the relief valve unit 43. It is fixed to and integrated with the upper surface of the ring-shaped portion 43b fixed to the portion 43a. Since there is no need to use a separate spring, the filter assembly and
Disassembly is easy, and there is no risk of losing the spring.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately modified and implemented within the scope of the present invention.

[0031]

According to the present invention, only the filter element can be separated from the filter main body, and the filter main body can be reused as it is, which is economical. In addition, it is possible to easily and reliably perform both attachment and detachment of the filter with respect to the attachment portion and attachment and detachment of the filtration element with respect to the filter main body. Furthermore, the cooling effect of the filter easily exposed to high temperatures can be enhanced.

[Brief description of the drawings]

FIG. 1 is a side view of a one-side cross section of a filter 1 according to an embodiment of the present invention.

FIG. 2 is a plan view of the filter 1;

FIG. 3 is a bottom view of the filter 1;

FIG. 4 is a side view of a one-side cross section of a filter 1 according to another embodiment of the present invention.

FIG. 5 is a partial cross-sectional view showing an example using a blade-shaped leaf spring 38b.

FIG. 6 is a perspective view of a blade-shaped leaf spring 38b.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filtration device 11 Filtration device main body 12 Inflow port 13 Outflow port 14 Screw part 15 First tool receiving part 16 Fin 16a Tip end face of fin 16 17 Second tool receiving part 21 Lid 22 Outermost peripheral part of lid 23 Angle Head 31 Filtration element 43 Relief valve unit

Continuation of the front page (56) References JP-A-6-58302 (JP, A) JP-A-5-261214 (JP, A) Jikai Sho 61-44205 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) B01D 35/30 B01D 27/08 B01D 35/02 F01M 11/03 F02M 35/024 F02M 35/04

Claims (10)

(57) [Claims] 1. A substantially cylindrical filter body having an inlet and an outlet for a fluid and a thread for mounting the filter at the bottom of a mounting side end, which is one end of the filter body, and a filter body. A filter element housed in the filter body, and a cover screwed to a cover-side end which is the other end of the filter body. A tool is provided on an outer periphery of the cover-side end of the filter body, A first tool receiving portion is formed so as to be rotatable while holding a side end portion, wherein the lid has a first outer peripheral portion formed on an outer periphery of a lid side end of the filter body. It is screwed to the filter body so as to be located inside the tool receiving portion, and forms a square head for tool receiving in the center of the upper surface of the lid, on the outer periphery of the mounting side end of the filter body, A filter formed with a second tool receiving portion so that a tool can rotate while holding the mounting end. 2. The filter according to claim 1, wherein the second tool receiving portion is formed to have a size compatible with a tool used for the first tool receiving portion. 3. The filter according to claim 2, wherein the tool used for the first tool receiving portion and the second tool receiving portion is a cap wrench. 4. The filter according to claim 2, wherein a plurality of fins are formed on an outer peripheral side surface of the filter body. 5. The filter according to claim 4, wherein the tip surfaces of the plurality of fins are formed at the same height as the outer peripheral surface of the first tool receiving portion. 6. The filter according to claim 4, wherein the second tool receiving portion is formed by a fin. 7. The filter according to claim 5, wherein the plurality of fins are formed in the height direction of the filter body, and the second tool receiving portion is formed by the plurality of fins. 8. A square head for receiving a tool is formed at the center of the upper surface of the lid formed in a concave shape.
The filter according to 4, 5, 6 or 7. 9. An upper end plate and a lower end plate for closing upper and lower end surfaces of a filtration portion of a filtration element and a porous inner cylinder are made of a heat-resistant synthetic resin, and the upper end plate and the lower end plate are integrated with the filtration portion. The filter according to claim 1, which is provided by molding. 10. The filter according to claim 9, further comprising a relief valve unit detachable from the filtration element.