JPH0824531A - Filter - Google Patents

Abstract

PURPOSE:To easily and surely perform both loading/unloading work of a filter body itself and loading/unloading work of a filter element on and from the filter body and to give cooling effect to the filter. CONSTITUTION:On the outer periphery of the cover side end part of a filter body 11, the 1st tool receiving part 15 for receiving a tool such as a cap wrench is formed, and on the outer periphery of the fitting side end part of the filter body 11, the 2nd tool receiving part 17 is also formed similarly. The 2nd tool receiving part 17 is formed with such dimensions that it fits the tool used in the 1st tool receiving part 15 by plural fins 16 on the outer peripheral side of the filter body 11. A cover 21 is screwed in the filter body 11 so that its utmost outer peripheral part may be placed inside from the 1st tool receiving part 15. A square head part 23 for receiving a tool is formed in the center of the upper surface of the cover 21.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter, and more particularly to a filter preferably 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 main body which is part of the internal combustion engine or fixed to the internal combustion engine is used in which a filter element is housed and mounted. However, in view of the fact that it is not easy to attach and detach the filtration element, it is an integral type filter in which the filtration element is housed in the filter body in advance. A so-called cartridge type filter, which can be attached and detached together, is used.

[0003]

However, most of the cartridge type filters are composed of different kinds of materials such as a filter element mainly composed of filter paper and a metal filter body, and Since the filtration element and the filter body that are made of different materials are manufactured integrally, and they are assumed to be disposable, they are not economically desirable. They are difficult to disassemble after use and are difficult to separate. Was occurring.

The present invention is an improvement of the conventional cartridge type filter as described above, in which the filter body can be attached to and detached from a part of the internal combustion engine and other mounting portions, and the filter element The purpose is to make it possible to separate only the filter body from the filter body and replace the filter element only so that the filter body can be reused as it is. Another object of the present invention is to enable easy and reliable attachment / detachment of a filter attachment part and attachment / detachment of a filtration element to / from a filter body. Furthermore, it aims at giving a cooling effect to the filter which is easily exposed to high temperature.

[0005]

DISCLOSURE OF THE INVENTION The present invention has a substantially cylindrical shape having a fluid inlet and outlet and a filter mounting screw portion at the bottom of the mounting side end which is one end of the filter body. A filter body, a filter element housed in the filter body, and a lid body screwed to a lid side end portion which is the other end portion of the filter body, and the lid side end portion of the filter body. The outer periphery of the tool has a
Of the filter body is formed so that the outermost peripheral portion of the lid body is located inside the first tool receiving portion formed on the outer periphery of the lid side end of the filter body. A square head for receiving a tool is formed in the center of the upper surface of the lid, which is screwed, and the tool is rotatable around the outer periphery of the mounting side end of the filter body while holding the mounting side end. Thus, it is a filter formed by forming a second tool receiving portion.

[0006]

When the filter is already attached to and removed from the mounting portion, the first part formed on the outer periphery of the end of the filter body on the lid side
By applying a tool to the tool receiving portion of the above, and holding and rotating the end portion on the lid side, the screw portion at the bottom portion of the attachment side end portion which is one end portion of the filter body is attached to the attachment site. Since the lid body is screwed to the filter body so that the outer peripheral portion thereof is located inside the first tool receiving portion formed on the outer periphery of the lid side end portion of the filter body, the first tool There is no obstacle when the tool is applied to the receiving part.

When assembling / disassembling the filter, that is, when attaching / detaching the lid body and the filter body for attaching / detaching the filter element to / from the filter body, a square head for tool reception formed in the center of the upper surface of the lid body. The tool and the filter body by applying the tool to the second tool receiving portion formed on the outer periphery of the attachment side end of the filter body and holding both to rotate. Can be attached and detached. In this case, if there is no second tool receiving portion formed on the outer periphery of the attachment side end portion of the filter body, the first tool receiving portion formed on the outer periphery of the lid side end portion of the filter body is held. It must be fixed, and this requires the first tool receiving portion to be held by a vise or other tool, which makes the attachment and detachment work complicated and uncertain. On the other hand, in the present invention, at each end of the filter body, a tool such as a cap wrench can be applied and detached,
The lid and the filter body can be easily and securely attached and detached.

By forming the second tool receiving portion in a size compatible with the tool used in the first tool receiving portion,
The lid can be attached / detached using the same tool as when attaching / detaching the filter body, without the need for different types of tools.

The first tool receiving portion is usually formed so as to match the contour of a regular polygon. It has the same shape as the square part of the bolt or nut, does not require special tools,
Tools such as wrenches and spanners can be used, allowing a wider range of tool selection. To match the contour of a regular polygon includes not only a perfect regular polygon but also an interrupted portion on the contour line of the regular polygon (for example, a side portion) or a straight or curved portion recessed inward. 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 body and the filter body become particularly easy.

By forming a plurality of fins on the outer peripheral side surface of the main body of the filter, it is possible to provide a cooling effect to the filter which is likely to reach a high temperature.

By forming the tip surfaces of the plurality of fins at a height that matches the outer peripheral surface of the first tool receiving portion, it is possible to suppress the projection of the fins with respect to the main body of the filter, while exerting a cooling effect. 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 during use, and a tool is attached to the fin portion when the lid and the filter body are attached and detached. It has a function of being attached and detached between the lid and the filter body.

A plurality of fins are formed in the height direction of the filter body, 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, it is possible to minimize the protrusion of the fins with respect to the filter body, and it is possible to reduce the size of the filter.The fins have a cooling effect during use, and when attaching and detaching the lid body and the filter body. , In addition to the effect that a tool is applied to this fin part to enable the lid body and the filter body to be attached and detached, the lid body and the filter body are attached and detached only at the end of the attachment side of the filter body. Instead, the tool can be applied in a wide area up to the end portion on the lid side in the height direction of the filter body. Therefore, the range of tool selection is widened, and not only a cap wrench but also a tool such as a box wrench can be applied.

[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 includes a filter body 11 made of a substantially cylindrical metal and a lid 21 made of a metal screwed to the end portion on the lid side.
And a filter element 31 housed in the filter body 11
It consists of A fluid inlet 12 and an outlet 13 and a screw portion 14 for mounting a filter formed on the inner surface of the outlet 13 are formed at the bottom of the mounting side end that is one end of the filter body 11. There is.

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

A plurality of fins 16 are formed in the height direction on the outer peripheral side surface of the filter body 11, and the tip surfaces 16a of the plurality of fins 16 are regular polygons of the first tool receiving portion 15. It is formed at a height such that the surfaces that form the sides match.

The plurality of fins 16 extend to the end of the filter body 11 on the mounting side and end in a taper shape.
As described above, the plurality of fins 16 have their tip surfaces 16a.
Is formed at a height such that the surface of the first tool receiving portion 15 forms the side of the regular polygon and the surface of the first tool receiving portion 15 matches.
Since it extends to the end of the filter body 11 on the attachment side, the fin 16 forms the second tool receiving portion 17 at the end of the filter body 11 on the attachment side. The outer diameter of the second tool receiving portion 17 is such that the tool used for the first tool receiving portion 15 is compatible, and a tool such as a cap wrench used for the first tool receiving portion 15 can be used in the same manner. It is like this.

In the present embodiment, a plurality of fins 16 are provided in the first
Although it is formed so as to be flush with the regular polygonal side portion of the tool receiving portion 15, it does not necessarily have to be continuous. Further, although it is formed in the height direction of the filter body 11, it may be formed in the circumferential direction of the filter body 11. The second tool receiving portion 17 may not be formed by the plurality of fins 16 but may be formed in, for example, a regular polygon.

The lid body 21 is screwed to the filter body so that the outermost peripheral portion 22 is located inside the first tool receiving portion 15 formed on the outer periphery of the end portion of the filter body 11 on the lid side. ing. A square head 23 for receiving a tool is formed at the center of the upper surface of the lid. The corner head 23 is, as shown, the lid 21.
It is advisable to provide the upper surface of the concave portion in the center thereof. Since the tool can be reliably set by making the height of the corner head 23 sufficiently large and the protrusion from the upper end surface line of the lid 21 can be avoided as much as possible, the filter can be downsized, and 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 end portion on the lid side of the filter body 11.

The filter element 31 housed in the filter body 11 is composed of a filter section 32 formed by bending a filter paper or the like into a chrysanthemum 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 inflow ports 12 formed at the bottom of the end of the filter body 11 on the mounting side, and flows out through a central outflow port 13. The screw portion 14 for mounting the filter formed on the outflow port 13 is screwed to the mounting portion.

The check valve 36 made of synthetic rubber or the like, which is located above the inflow port 12 and is made of synthetic rubber, has the functions of blocking the reverse flow of fluid and isolating and sealing the inflow passage and the outflow passage. Reference numeral 37 is a gasket made of heat and oil resistant rubber, reference numeral 38 is a spring for pressing and holding the filter element with the lid 21, reference numeral 39 is a washer, and reference numeral 40 is a seal between the filter body 11 and the lid 21. It is an O-ring.

In this type of filtration element 31, the upper end plate 33, the lower end plate 34, and the perforated inner cylinder 35 that close the upper and lower end surfaces of the filtration section 32 are conventionally made of metal, so that filter paper or the like is used. Filtering part 32
Disposal of the filtration element integrated with was a problem (difficult to disassemble and difficult to separate),
By configuring each member of the upper end plate 33, the lower end plate 34, and the perforated inner cylinder 35 from paper or a synthetic resin that can be disposed of as a combustible material, disassembly and separation processing are unnecessary, and when disposing of the filtration element, The problem of can be solved.

A relief valve unit 43 made of metal is provided above the center of the filtration element 31, and the valve element 44 is pushed downward when the filtration pressure rises. If the relief valve unit 43, which was conventionally integrated with the filtration element, can be separated from the filtration element 31 with a single touch, 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.

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

At the upper part of the filtration section 32, the relief valve unit 43 is not fixedly attached to the filtration element and is not integrated with the filtration element, but forms a separate body. The relief valve unit 43 is attached to the upper end plate 33b and the valve seat section 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 digs in, and closes and seals the fluid 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 to close / seal the filtration passage. The valve element 44 is locked on the inner peripheral side of the ring-shaped portion 43b. The rising portion 43d of the ring-shaped portion 43b of the relief valve unit 43 is just fitted to the inner peripheral side portion of the upper end plate 33b. Therefore, the relief valve unit 43 can be easily attached to the filtration element 31, and can be separated from the filtration element 31 with one touch, and the relief valve unit 43 can be reused. Further, since it is not necessary to use a metal end plate on the upper part of the filtration unit 32, disassembling and separating treatment at the time of disposal becomes unnecessary, and the problem at the time of disposal of the filtration element can be solved.

A check valve 36b made of synthetic rubber is provided below the filter 32. Unlike the one shown in FIG.
There is no lower metal end plate. The check valve 36b is formed thicker than that shown in FIG. 1, fits into the outer peripheral side wall portion 13a of the outflow port 13, and is recessed in the upper outer side wall of the check valve 36b. Or step)
36 c is formed, and the inner peripheral side portion of the lower end plate 34 b is engaged with the concave portion 36 c and is located between the inflow port 12 and the outflow port 13 to separate the inflow passage and the outflow passage from each other and seal. are doing. Therefore, it is advantageous in that it is not necessary to use a metal end plate in the lower portion of the filtration unit 32, as in the case of the upper portion of the filtration unit 32 described above.

FIG. 5 shows that in the example shown in FIG. 4 (which can also be applied to the one shown in FIG. 1), the filter element is replaced with the lid 2.
The blade spring 38b shown in FIG. 6 is used as a member for pressing and holding by 1 without using a coil spring as a separate member. The plate spring 38b is a valve seat of the relief valve unit 43. The ring-shaped portion 43b fixed to the portion 43a is fixed to and integrated with the upper surface of the ring-shaped portion 43b. As it is not necessary to use a separate spring,
It is easy to disassemble 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-mentioned embodiments but can be appropriately modified and implemented within the scope of the gist of the present invention.

[0031]

According to the present invention, only the filter element can be separated from the filter body and the filter body can be reused as it is, which is economical. Further, both attachment / detachment of the filter attachment part and attachment / detachment of the filtration element to / from the filter body can be performed easily and reliably. Further, it is possible to enhance the cooling effect of the filter that is easily exposed to high temperatures.

[Brief description of drawings]

FIG. 1 is a side view of a one-sided 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-sided 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 plate spring 38b.

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filter 11 Filter main body 12 Inlet 13 Outlet 14 Screw part 15 1st tool receiving part 16 Fin 16a Tip surface of fin 16 17 2nd tool receiving part 21 Lid 22 Outermost part 23 of lid 23 corner Head 31 Filtration element 43 Relief valve unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location F02M 35/04 B

Claims (10)

[Claims] 1. A substantially tubular filter body having a fluid inlet and outlet and a screw portion for mounting the filter at the bottom of the mounting side end which is one end of the filter body, and the filter body. A filter element housed in the filter body and a lid body screwed to the other end portion of the filter body, which is the other end portion of the filter body. The first tool receiving portion is formed so as to be rotatable while holding the side end portion, and the outermost peripheral portion of the lid body is formed on the outer periphery of the lid side end portion of the filter body. Screwed to the filter body so as to be located inside the tool receiving portion, and at the center of the upper surface of the lid body, a square head for tool receiving is formed, and on the outer periphery of the mounting side end portion of the filter body, A filter comprising a second tool receiving portion so that the tool can rotate while holding the mounting side end portion. 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 the 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 to have a height that matches 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 a height direction of the filter body, and the second tool receiving portion is formed of the plurality of fins. 8. A tool receiving corner head is formed in the center of the upper surface of the lid body formed in a concave shape.
The filter according to 4, 5, 6 or 7. 9. An upper end plate, a lower end plate, and a perforated inner cylinder for closing the upper and lower end faces of the filtration portion of the filtration element are made of a heat-resistant synthetic resin, and the upper end plate and the lower end plate are integrally formed in 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 filter element.