JPH11123305A - Element exchange-type filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To allow elements to be exchangeable without conversion of an existing internal combustion engine side, simplify a housing structure, and facilitate disposal of an element assembly. SOLUTION: In an oil filter 100, a female part 12 connecting to a hollow through-type bolt 30 provided protrusively on an internal combustion engine side by utilizing a cylindrical protrudent part 11 inside a housing 10 is formed integrally, and the housing 10 is directly connected to the through-type bolt 30. Thereby, the housing 10 of the oil filter 100 requires no connection work of other members and the like, having an extremely simple structure, allowing cost down to be realized greatly. When elements of the oil filter 100 are changed, only burnable elements S/A40 made of filter paper or the like are discarded, allowing environmental problems to be treated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an element exchange type filter, and can be used, for example, as an oil filter for filtering foreign matter, abrasion powder, carbon and the like mixed in oil for lubricating an internal combustion engine.

[0002]

2. Description of the Related Art Conventionally, as a prior art document relating to an element exchange type filter, one disclosed in Japanese Utility Model Laid-Open No. 5-1811 is known.

In this technology, a technology is disclosed in which an element assembly including a filter element that is accommodated in an oil filter and filters oil is removed by removing a housing screwed to a cylinder block side of an internal combustion engine. I have.

[0004]

By the way, in the above-mentioned device, it is necessary to integrally fix a separate mounting member (center pipe) holding the element assembly including the filter element to the inner bottom surface of the housing. At the same time, since the positional accuracy of the mounting member with respect to the housing in the axial direction is also required, there is a problem that manufacturing is difficult and cost is increased.

The present invention has been made in order to solve such a problem, and it is an object of the present invention to provide an element exchange type filter which does not require modification of an existing internal combustion engine. It is an object of the present invention to provide an element exchange type filter which can reduce the cost and facilitate disposal of the element assembly.

[0006]

According to the element exchange type filter of the first aspect, a connection portion with a mounting member protrudingly provided on the internal combustion engine side is integrally formed on the inner bottom surface of the housing. Since the housing of the mold filter does not require a separate member to be joined or the like, the configuration is extremely simple, so that considerable cost reduction can be achieved.

In the element exchange type filter according to the second aspect, since the mounting member is formed separately from the housing, the relief valve can be easily housed in the mounting member, and the reliability of the operation can be easily secured.

In the element exchange type filter according to the third aspect, when the filter element of the element assembly has a sufficient filtering ability, the fluid passes from the filter element through the porous portion formed in the mounting member and enters the inside thereof. A flow path leading to is formed. For this reason, by forming the porous portion of the mounting member corresponding to the filtering region on the inner peripheral surface of the filter element, the filtering capability of the filter element can be sufficiently exhibited. Further, since the element assembly does not include a mounting member, it is only necessary to discard the element assembly having the filter element at the time of element replacement, so that it is possible to deal with environmental problems.

In the element exchange type filter according to the fourth aspect, since the element assembly can be inserted into the mounting member almost to the upper end thereof, the entire height of the filter element can be secured while securing a predetermined filtration area of the filter element. It can be kept low.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below based on examples.

Embodiment 1 FIG. 1 is a cross-sectional view showing an overall configuration of an oil filter to which an element-exchange type filter according to a first embodiment of the present invention is used in a use state, and FIG. 1 is an exploded view of FIG.

1 and 2, reference numeral 100 denotes an oil filter for an internal combustion engine. The oil filter 100 has a cylindrical projection 11 integrally formed on an inner bottom surface of a bottomed cylindrical housing 10 made of aluminum or the like. Is formed. A female screw portion 12 is provided on the inner peripheral surface of the cylindrical convex portion 11 of the housing 10. Further, a hollow penetrating bolt 30 is provided in the cylinder block 20 of the internal combustion engine with its fixing portion 3.
4 and are screwed and protruded. The female thread 12 of the housing 10 and the male thread 31 of the hollow through bolt 30 are screwed. At this time, an O-ring 15 is provided inside the open end of the housing 10, and the inside of the housing 10 and the filter mounting surface 20 a of the cylinder block 20 are brought into a liquid-tight connection state via the O-ring 15. .

The hollow penetrating bolt 30 is provided with a porous portion 32 that communicates the peripheral surface with the hollow penetrating inside. An element assembly 40 having a cylindrical filter element 41 formed by bending a filter paper for filtering oil is inserted and accommodated in the outer peripheral surface of the hollow through bolt 30. In the following, the element assembly 4
0 is described as “Element S / A (Sub-Assembly) 40”.

In the element S / A 40, an element end plate 42 and a seal member 43 made of the same material as the filter paper material are joined to both ends of a filter element 41 and are integrated. The support member 45 is pressed from the inner bottom surface of the housing 10 by the urging force of the support spring 46.
The element S / A 40 is urged through the through hole, and the element S / A 40 is pressed and fixed on the flange portion 33 of the hollow through bolt 30.

A relief valve 35 is urged by a relief spring 36 to face a locking member 37 fixed to the inner peripheral end of the male thread portion 31 of the hollow through bolt 30. On the inner peripheral surface of the cylindrical convex portion 11 where the female screw portion 12 of the housing 10 is formed, a V-shaped groove portion 13 having a predetermined width is formed at a plurality of locations beyond the length of the female screw portion 12 in the engaging and disengaging direction by the screw. Is formed.

Next, an oil flow path when oil for lubricating the internal combustion engine is filtered by the oil filter 100 will be described with reference to FIGS. FIG. 3 shows FIG.
FIG. 7 is a cross-sectional view of a main part showing the operation of the relief valve 35 of FIG.

In FIG. 1, the contaminated oil pressure-fed from the internal combustion engine is introduced into the housing 10 through the oil inlet 21 of the cylinder block 20. When the filter element 41 of the element S / A 40 has a sufficient filtering ability, the dirty oil passes through the filter element 41 to be purified oil, and the purified oil is converted to the porous portion 32 of the hollow through bolt 30. From the oil outlet 22 of the cylinder block 20 to the internal combustion engine side through the inside of the fixing portion 34 of the hollow through bolt 30. At this time, the state in which the relief valve 35 provided in the hollow through bolt 30 is pressed against the locking member 37 by the urging force of the relief spring 36 as shown in FIG.

Here, when the filter element 41 of the element S / A 40 is clogged or the like and the filtration ability is reduced, the pressure of the contaminated oil introduced into the housing 10 from the internal combustion engine side increases. This housing 1
When the pressure of the contaminated oil introduced into
When the oil rises to overcome the urging force of the relief spring 36, the dirty oil does not pass through the filter element 41 of the element S / A 40, and as shown by an arrow in FIG. The relief valve 35 is pushed down through the groove 13 formed in the convex portion 11, and an oil flow path extending from the circumferential end surface to the inside of the hollow through bolt 30 is formed. Then, the oil passes through the inside of the fixing portion 34 of the hollow penetration bolt 30 and returns from the oil outlet 22 of the cylinder block 20 to the internal combustion engine side.

As described above, the oil filter 1 of this embodiment
Reference numeral 00 denotes a female screw portion 12 as a connecting portion with a hollow through bolt 30 as a mounting member protruding from a cylinder block 20 on the internal combustion engine side on a cylindrical convex portion 11 on the inner bottom surface of a bottomed cylindrical housing 10. It is formed integrally.
That is, the female screw portion 12 is formed integrally with the hollow through bolt 30 protruding from the internal combustion engine using the cylindrical convex portion 11 in the housing 10, and the housing 10 is directly connected to the hollow through bolt 30. , Be combined. For this reason, the housing 10 in the oil filter 100 does not require a joining process or the like of another member, and the configuration is extremely simple, so that considerable cost reduction can be achieved.

Further, the oil filter 100 of the present embodiment
The hollow through bolt 30 as a mounting member has a hollow through shape and accommodates a relief valve 35 as a relief valve that forms a bypass flow passage when the pressure of oil as a fluid becomes a predetermined value or more. That is, since the hollow through bolt 30 is configured separately from the housing 10, the relief valve 35 can be easily housed in the hollow through bolt 30,
It is easy to ensure the reliability of the operation.

The oil filter 100 of the present embodiment
The hollow through bolt 30 as a mounting member holds the inner peripheral surface of the element S / A 40 having the filter element 41 for filtering the oil as a fluid, and the oil filtered by the filter element 41 is removed from its peripheral surface. A porous portion 32 that can pass freely is formed inside the hollow penetration. Therefore, when the filter element 41 of the element S / A 40 has a sufficient filtering ability, a flow path from the filter element 41 to the inside of the hollow through bolt 30 through the porous portion 32 of the hollow through bolt 30 is formed. Therefore, the porous portion 32 of the hollow penetration bolt 30
Is formed corresponding to the filtering area on the inner peripheral surface of the filter element 41, whereby the filtering capability of the filter element 41 can be sufficiently exhibited. In addition, when replacing the element in the oil filter 100, it is only necessary to discard the incinerated element S / A40 made of filter paper or the like, so that it is possible to deal with environmental issues.

Further, the oil filter 100 of the present embodiment
The internal thread 12 as a connecting portion of the housing 10 has a length exceeding the internal thread 12 in the engaging and disengaging direction by at least one.
Oil as a fluid passes through the groove 13 when the internal thread 12 and the hollow through bolt 30 are connected to each other.
5 is formed. Therefore, with respect to the hollow through bolt 30, the element S
/ A40 can be inserted. For this reason, it is possible to keep the overall height low while securing the filtration area of the filter element 41 of the element S / A 40.

Incidentally, the oil filter 10 of this embodiment is
In the case of 0, the groove 13 is formed in the female thread portion 12 of the cylindrical convex portion 11 of the housing 10 as the coupling portion, but a slit-shaped notch may be provided instead of the groove 13.

<Embodiment 2> FIG. 4 is a sectional view showing the overall configuration of an oil filter using an element exchange type filter according to a second embodiment of the present invention in a use state. In the drawings, the same reference numerals and symbols are given to components having the same configuration or corresponding portions as those in the above-described embodiment, and detailed description thereof will be omitted.

In FIG. 4, reference numeral 200 denotes an oil filter for an internal combustion engine. The oil filter 200 has a cylindrical projection 51 integrally formed on the inner bottom surface of a bottomed cylindrical housing 50 made of aluminum or the like. I have. An external thread 52 is provided on the outer peripheral surface of the cylindrical projection 51 of the housing 50.
Is provided. A hollow through bolt 60 is screwed into and protruded from the cylinder block 20 of the internal combustion engine by using a fixing portion 64 thereof. And this housing 5
0 male screw part 52 and female screw part 61 of hollow through bolt 60
And are screwed. At this time, the O-ring 15 is provided inside the open end of the housing 50, and the inside of the housing 50 and the cylinder block 20 are
Is in a liquid-tight connection with the filter mounting surface 20a.

The hollow penetrating bolt 60 is provided with a porous portion 62 which communicates the peripheral surface with the inside of the hollow penetrating bolt. An element S / A 40 having a cylindrical filter element 41 formed by bending filter paper to filter oil is inserted and accommodated in the outer peripheral surface of the hollow through bolt 60. The support member 4 is pressed from the inner bottom surface of the housing 50 by the urging force of the support spring 46.
5, the element S / A 40 is urged, and the element S / A 40 is pressed against the flange 63 of the hollow through bolt 60 and fixed in position.

A valve housing 67 is screwed and fixed between the flange portion 63 and the fixing portion 64 of the hollow through bolt 60, and a valve housing space is formed by the hollow through bolt 60 and the valve housing 67. . A hole 67 formed in the valve housing 67 is provided in the valve storage space.
The relief valve 65 is urged by a relief spring 66 so as to oppose a. In addition, a hole 64a is formed in the upper part of the fixing portion 64 of the hollow through bolt 60 to communicate between the inside of the valve housing space and the hollow through-hole bolt 60 inside.

Next, an oil flow path when oil for lubricating the internal combustion engine is filtered by the oil filter 200 will be described with reference to FIGS. FIG. 5 is FIG.
FIG. 7 is a cross-sectional view of a main part showing the operation of the relief valve 65 of FIG.

In FIG. 4, the contaminated oil pumped from the internal combustion engine is introduced into the housing 50 through the oil inlet 21 of the cylinder block 20. When the filter element 41 of the element S / A 40 has a sufficient filtering ability, the dirty oil passes through the filter element 41 to be purified oil, and the purified oil is converted to the porous portion 62 of the hollow through bolt 60. From the oil outlet 22 of the cylinder block 20 through the inside of the fixing portion 64 of the hollow through bolt 60 to return to the internal combustion engine side. At this time, the relief valve 65 housed in the valve housing 67 fixed to the hollow through bolt 60 is
As shown in FIG. 5A, the state of being pressed against the hole 67a side of the valve housing 67 by the urging force of the relief spring 66 is not operated.

Here, when the filter element 41 of the element S / A 40 is clogged or the like and the filtration capacity is reduced, the pressure of the contaminated oil introduced into the housing 50 from the internal combustion engine side increases. This housing 5
The pressure of the contaminated oil introduced into the pressure relief valve 65
When the pressure rises to overcome the urging force of the relief spring 66, the dirty oil does not pass through the filter element 41 of the element S / A 40, and as shown by an arrow in FIG. The relief valve 65 is pushed up through the passage 67a, and an oil flow passage is formed from the inside of the valve housing space to the inside through the hole 64a of the hollow through bolt 60. Then, the oil is returned from the oil outlet 22 of the cylinder block 20 to the internal combustion engine through the inside of the fixing portion 64 of the hollow through bolt 60.

As described above, the oil filter 2 of this embodiment
Reference numeral 00 denotes a male screw part 52 as a connecting part with a hollow through bolt 60 as a mounting member protruding from the cylinder block 20 on the internal combustion engine side on a cylindrical convex part 51 on the inner bottom surface of the bottomed cylindrical housing 50. It is formed integrally.
In other words, the male screw portion 52 is formed integrally with the hollow through bolt 60 protruding from the internal combustion engine using the cylindrical convex portion 51 in the housing 50, and the housing 50 is directly connected to the hollow through bolt 60. Be combined. For this reason, the housing 50 of the oil filter 200 does not require a joining process or the like of another member, and the configuration is extremely simple, so that considerable cost reduction can be achieved.

The oil filter 200 according to the present embodiment
The hollow through bolt 60 as a mounting member has a hollow through shape and accommodates a relief valve 65 as a relief valve that forms a bypass flow passage when the pressure of oil as a fluid becomes a predetermined value or more. That is, since the hollow through bolt 60 is separate from the housing 50, the relief valve 65 can be easily housed in the hollow through bolt 60, and the operation reliability thereof can be easily ensured.

The oil filter 200 of this embodiment is
The hollow through bolt 60 as a mounting member holds the inner peripheral surface of the element S / A 40 having the filter element 41 for filtering the oil as a fluid, and the oil filtered by the filter element 41 is removed from its peripheral surface. A porous portion 62 that can pass freely is formed inside the hollow penetration.

Therefore, when the filter element 41 of the element S / A 40 has a sufficient filtering ability, oil flows from the filter element 41 through the porous portion 62 of the hollow through bolt 60 to the inside thereof. Is done. For this reason, the porous portion 62 of the hollow penetration bolt 60
Is formed corresponding to the filtering area on the inner peripheral surface of the filter element 41, whereby the filtering capability of the filter element 41 can be sufficiently exhibited. Further, when replacing the element in the oil filter 200, it is only necessary to discard the incinerated element S / A40 made of filter paper or the like, so that it is possible to deal with environmental problems.

By the way, in the oil filter of the above embodiment, a female screw portion or a male screw portion is formed on the cylindrical convex portion on the inner bottom surface of the housing as a connection portion with the mounting member. Not limited
For example, a bayonet connection method or the like other than the screw connection may be employed.

In the above embodiment, application of the present invention to an oil filter as an element exchange type filter has been described. However, the present invention is not limited to this, and is applicable to an element exchange type fuel filter. May be.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an overall configuration of an oil filter to which an element-exchange type filter according to a first example of an embodiment of the present invention is used.

FIG. 2 is an exploded view of FIG.

FIG. 3 is a cross-sectional view of a principal part showing operation of the relief valve of FIG. 1;

FIG. 4 is a cross-sectional view illustrating an overall configuration of an oil filter to which an element exchange type filter according to a second example of the embodiment of the present invention is used.

FIG. 5 is a cross-sectional view of a relevant part showing operation of the relief valve of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Housing 11 Cylindrical convex part 12 Female screw part (joining part) 13 Groove part 30 Hollow penetration bolt (mounting member) 32 Porous part 35 Relief valve (relief valve) 40 Element S / A (Element assembly) 41 Filter element 100 Oil filter (Oil filter) Element exchange type filter)

Claims (4)

[Claims] 1. An element exchange type filter, wherein a connection portion with a mounting member protruding toward an internal combustion engine is integrally formed on an inner bottom surface of a bottomed cylindrical housing. 2. The mounting member has a hollow through shape,
The element exchange type filter according to claim 1, wherein a relief valve that forms a bypass flow path is housed when the pressure of the fluid becomes equal to or higher than a predetermined value. 3. The mounting member holds an inner peripheral surface of an element assembly having a filter element for filtering a fluid, and allows the fluid filtered by the filter element to enter from the peripheral surface into a hollow through-hole. The element exchange type filter according to claim 2, wherein a perforated porous portion is formed. 4. The connecting portion of the housing has at least one groove or notch having a predetermined width that is longer than the connecting portion in the engaging and disengaging direction, and the connecting portion is connected to the mounting member. The element exchange type filter according to claim 2, wherein in the state, a fluid forms a flow passage through the groove or the notch to the relief valve.