JPH08135428A - Oil filter - Google Patents

Abstract

PURPOSE: To reduce an assembly man-hour of an oil filter with a small number of part items. CONSTITUTION: This oil filter is constituted of a filter medium 2 for oil filtration installed in a case 9, a reinforce plate 5 provided below the filter medium 2 and a support body 1 interposed between the filter medium 2 and the reinforce plate 5. An introduction port 51 to introduce oil to the filter medium 2 and a lead-but port 55 to lead-out filtered oil are provided on the reinforce plate 5. A check valve 31 is arranged on the introduction port 51 between itself and the support body 1. The support body 1 integrally constitutes a support member 11 to support the filter medium 2 and an energizing member 12 with a check valve to energize the check valve 31 on the introduction port 51 in the valve closing direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil filter used for internal combustion engines of automobiles and the like.

[0002]

2. Description of the Related Art An internal combustion engine of an automobile is provided with an oil filter for filtering engine oil. As an oil filter, there is a conventional one having, for example, a filter body for oil filtration housed in a case and a reinforcement plate arranged below the filter body (actual flat plate 2).
─ 141774 gazette). In the oil filter,
The filter body is housed in a case by a support body. On the other hand, the reinforcement plate has an inlet port for introducing oil into the filter body. The inlet is equipped with a rubber check valve to prevent oil backflow.

[0003]

However, in the above-mentioned conventional oil filter, the check valve is composed only of the rubber body. Therefore, the urging force that constantly urges the check valve in the direction of the inlet depends on the elastic force of the rubber itself. Therefore, the durability of the check valve becomes a problem. Therefore, in order to improve the durability of the check valve, it is conceivable to provide another member for regulating the maximum displacement of the rubber piece forming the check valve or for urging the rubber piece. . However, in this case, a large number of parts are required, and the man-hour for assembling becomes large. Further, this increases the cost of the oil filter.

In view of the above conventional problems, the present invention aims to provide an oil filter which has a small number of parts and which can reduce the number of assembling steps.

[0005]

According to the present invention, there is provided a filter body for filtering oil contained in a case, a plate located at an open end of the case, and a support body provided between the filter body and the plate. In addition to the above, the plate is provided with an inlet for introducing oil into the filter body and an outlet for discharging filtered oil, and the inlet has:
A check valve is arranged between the support and the support, and the support is positioned in the valve opening direction of the check valve at the inlet and the support member that supports the filter, and the check is provided. An oil filter is characterized by integrally forming a check valve contact member capable of contacting a valve.

What is most noticeable in the present invention is that a support is provided between the filter and the plate, and the support is capable of contacting the support member supporting the filter and the check valve. That is, the check valve contact member is integrally configured.

In the support, the support member and the check valve contact member are integrally formed via, for example, an annular body portion. As a specific example of the integral structure of the above-mentioned support, when a support member and a check valve contact member are alternately radially extended from an annular body (see FIGS. 2 and 3), a pair of support members There is a case where a check valve contact member is provided between them (see FIG. 8). Further, there is a case where a support member is provided above the outer circumference of the body portion and a check valve contact member is provided below the outer circumference thereof (see FIGS. 9 and 10).

The support member of the support body supports the filter body. On the other hand, the check valve contact member can be configured as a check valve urging member that urges the check valve at the oil inlet in the valve closing direction. The support member and the check valve contact member having these characteristics can be integrally manufactured by a spring steel material, a non-ferrous metal rolling plate, or the like.
In addition, both the support member and the check valve contact member may have any shape such as a long plate shape or a ring shape.

The support preferably has a bypass passage for bypassing the oil introduced from the inlet. As a result, due to clogging of the filter,
When the oil pressure in the case rises abnormally, the oil can be bypassed without passing through the filter body to prevent an excessive pressure state in the case. The bypass passage is connected to a discharge port for discharging filtered oil.

It is preferable that the check valve has an annular bypass valve body that closes the bypass passage. As a result, when the oil in the case is under normal pressure,
All the oil can be introduced into the filter body without bypassing it to the bypass passage. Further, it is preferable that the check valve and the bypass valve body are integrally configured. As a result, the number of parts of the oil filter can be reduced and the cost can be reduced. Further, the check valve and the bypass valve body can be integrally formed by an elastic body such as rubber.

It is preferable that a C-shaped ring spring plate for urging the bypass valve body toward the support body is provided inside the annular bypass valve body. By this,
When the oil is in a normal pressure state, all of the oil is introduced into the filter body, and on the other hand, the oil can be bypassed to the bypass passage only when the oil in the case becomes overpressured as described above. it can.

[0012]

[Operation and effect] In the oil filter of the present invention,
The support member that supports the filter body and the check valve contact member of the check valve are integrally configured as a support body. Therefore, it is possible to configure the check valve abutting member that supports the filter body and assists the check valve by one component without using a large number of components as in the conventional case. Therefore, according to the present invention,
The number of parts can be significantly reduced. Further, the number of steps for assembling the oil filter can be reduced, and the cost can be reduced.

According to the present invention, it is possible to provide an oil filter which has a small number of parts and which can reduce the number of assembling steps.

[0014]

【Example】

Example 1 FIG. 1 shows an oil filter according to an example of the present invention.
~ It demonstrates using FIG. Oil filter 10 of this example
As shown in FIG. 1, a filter body 2 for oil filtration mounted and housed in a metal case 9 and the filter body 2 are provided.
And a reinforcement plate 5 provided below the. Between the filter body 2 and the reinforcement plate 5,
The support 1 is interposed.

The reinforcement plate 5 is a plate located at the opening end 901 of the case 9. The reinforcement plate 5 is provided with a plurality of inlets 51 for introducing oil into the filter body 2 and an outlet 55 for leading out the filtered oil. The inlets 51 are arranged on the circumference of the outlet 55 at equal intervals on the circumference. All of these plural inlets 51 have a check valve 31 between them and the support 1.
Has been arranged. The check valve 31 is closed when the oil flow is stopped to prevent the oil accumulated in the case 9 from flowing back from the introduction port 51. On the other hand, when the oil is circulating, the check valve 31 opens.

The support body 1 integrally comprises a support member 11 for supporting the filter body 2 and a check valve urging member 12 for urging the check valve 31 at the inlet 51 in the valve closing direction. are doing. The check valve urging member 12 is located in the valve opening direction of the check valve 31 and is in contact with the check valve 31. Support 1
As shown in FIGS. 1 and 3, a bypass passage 150 for bypassing the oil introduced from the inlet 51 is provided.
have.

As shown in FIG. 6, the check valve 31 has an annular bypass valve body 35 for closing the bypass passage 150, and these are rubber bodies integrally formed of a rubber material. . Further, as shown in FIGS. 1 and 5, inside the annular bypass valve body 35, as shown in FIGS.
A ring spring plate 6 for urging the spring is provided in the direction of the support 1. The ring spring plate 6 is C-shaped, and the notch 6
One.

As shown in FIGS. 1 to 3, the support member 1 includes a support member 11 and a check valve urging member 12 which are formed in an annular body portion 1.
The former and the latter are integrally formed via four, respectively, radially above and below the outer circumference. The check valve urging member 12 and the support member 11 are both long plate shapes and are appropriately designed so as to have appropriate spring force and strength.

An annular seal portion 14 is provided at the upper center of the support 1. The seal portion 14 has a diameter slightly larger than the inner wall of the cylindrical filter body 2.
Therefore, the seal portion 14 slightly presses the inner wall of the filter body 2 in the outer peripheral direction to prevent rattling of the filter body 2 and to prevent unfiltered oil from mixing with the filtered oil. Seal between the spaces. The support member 11 is
The filter body 2 is fixed by pressing it above the case 9. The check valve urging member 12 urges the check valve 31 located around the inlet 51 in the valve closing direction. The support 1 is made of a spring steel material.

The filter body 2 is a porous body formed by molding a pulp material or the like. Further, the filter body 2 has a cylindrical shape having the inner cavity 24, and is fixed above the case 9 by the spring force of the support member 11 of the support body 1 as described above. The reinforcement plate 5 is joined to the ring plate-shaped metal bottom plate 91 by welding. The outer peripheral edge of the metal bottom plate 91 is joined to the opening end 901 of the case 9 by caulking. A sealing rubber body 92 is joined to the lower side of the metal bottom plate 91 by caulking or the like. The oil filter 10 is closely fixed to the engine side mounting portion via the sealing rubber body 92.

The oil filter 10 operates as follows. First, the oil that is sent under pressure is
Inflow from the inlet 51 pushes the check valve 31 open to open the case 9
And rises between the inner peripheral surface of the case 9 and the outer peripheral surface of the filter body 2. Then, the oil flows through the filter body 2,
It passes toward the center and is purified. The purified oil is returned to the internal combustion engine through the outlet 55.

At this time, the filter body 2 is clogged,
If the pressure inside Case 9 exceeds the upper limit set pressure,
As shown in FIG.
Through 0, the bypass valve element 35 covering the inner wall is pushed.
The bypass valve element 35 pushes the C-shaped ring spring plate 6 provided on the inner wall side thereof. The outer peripheral diameter of the ring spring plate 6 is reduced by narrowing the gap between the cutout portions 61.

Therefore, a gap 153 is formed between the bypass passage 150 and the bypass valve element 35 as shown in FIG. Therefore, the oil passes through the bypass passage 150 and the gap 153, and is bypassed to the outlet 55 of the reinforcement plate 5. Therefore, Case 9
It is possible to prevent the inside of the tank from becoming an overpressure state due to the pressure of the introduced oil.

Next, the function and effect of this example will be described.
In the oil filter 10 of this example, the support member 11 that supports the filter body 2 and the check valve urging member 12 of the check valve 31 are provided.
And are integrally formed as the support 1. Therefore, the support of the filter body 2 and the check valve urging member for urging the check valve 31 can be integrally configured by one component without using a large number of components as in the conventional case. Further, the check valve 31 has an annular bypass valve body 35 that closes the bypass passage 150, and these are integrally configured.

Therefore, according to this example, the number of parts can be significantly reduced. Further, the number of assembling steps of the oil filter 10 can be reduced, and the cost can be reduced.
Further, in this example, the ring spring plate 6 provided with the cutout portion 61 is arranged inside the bypass valve body 35. Therefore, when the pressure inside the case 9 exceeds the upper limit set pressure, the oil inside the case 9 can be easily bypassed from the bypass passage 150. Therefore, the case 9 can be prevented from being damaged, which is safe.

Example 2 The oil filter of this example is an example in which a support 100 shown in FIG. 8 is provided. The support 100 includes a pair of support members 11
A check valve urging member 121 is provided between 1, 112.
The support members 111 and 112 extend radially above the outer periphery of the body portion 15, and the check valve biasing member 121 extends radially below the outer periphery of the body portion 15. An annular seal portion 14 is provided above the center of the body portion 15 (see FIG. 3). Others are the same as in the first embodiment. Also in this example, the same effect as that of the first embodiment can be obtained.

Example 3 The oil filter of this example is a support 1 shown in FIGS.
This is an example in which 01 is provided. Body part 1 in support 101
Two pairs of arc-shaped elongated plate-shaped support members 113 along the body portion 15 are provided above the outer periphery of 5, and a ring-shaped check valve urging member 122 is provided below the outer periphery of the member. ing. The respective support members 113 are paired and connected to the body portion 15 by two connecting portions 114 provided at equal intervals.

Further, the check valve urging member 122 is connected by two connecting portions 123 provided at equal intervals.
An annular seal portion 1 is provided above the center of the body portion 15.
4 is provided. Others are the same as in the first embodiment. In this example, the support body 101 is an annular check valve urging member 1 having an annular shape.
Since 22 is provided, the support 101 can be easily handled in the assembly process, and the check valve 31 can be uniformly biased over the entire circumference. In addition, also in this example, the same effect as that of the above-described first example can be obtained.

In the above embodiment, the plate provided at the opening end 901 of the case 9 is composed of the reinforcement plate 5 and the metal bottom plate 91. However, these plates are integrated into one plate to form the opening end 901 of the case 9. May be provided.

Further, the check valve 31 itself has sufficient elasticity in the valve closing direction, and the check valve urging member 12 is provided with a valve of the check valve 31 as shown by a broken line 200 in FIG. The stroke restricting member of the check valve 31 may be formed by locating the valve at a predetermined distance from the closed position toward the valve opening direction. According to this configuration, it is possible to restrict the maximum stroke of the check valve 31 and enhance the durability of the rubber of the check valve 31.

[Brief description of drawings]

FIG. 1 is a sectional view of an oil filter according to a first embodiment.

FIG. 2 is a plan view of a support body according to the first embodiment.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is an enlarged downward sectional view of the oil filter according to the first embodiment.

FIG. 5 is a perspective view of the ring spring plate of the first embodiment.

FIG. 6 is a perspective view of the check valve according to the first embodiment.

FIG. 7 is an explanatory diagram showing a state in which the oil is bypassed according to the first embodiment.

FIG. 8 is a plan view of a support of Example 2.

FIG. 9 is a perspective view of a support of Example 3.

FIG. 10 is a (X) plan view of the support in Example 3;
(Y) Front view, (X) plan view BB line arrow (Z) sectional view.

[Explanation of symbols]

 1,100,101. . . Support, 10. . . Oil filter, 11, 111, 112, 113. . . Support member, 12, 121, 122. . . Check valve urging member, 14. . . Seal part, 15. . . Body part, 150. . . Bypass passage, 2. . . Filter body, 31. . . Check valve, 35. . . Bypass valve body, 5. . . Reinforce plate, 51. . . Inlet, 55. . . Outlet, 6. . . Ring spring plate, 9. . . Case,

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yurio Nomura 1-1-1, Showa-cho, Kariya city, Aichi prefecture Nihon Denso Co., Ltd.

Claims (5)

[Claims] 1. A filter body for oil filtration housed in a case, a plate located at an open end of the case, and a support body interposed between the filter body and the plate, The plate is provided with an inlet for introducing oil into the filter and an outlet for discharging filtered oil, and the inlet is provided with a check valve between the inlet and the support. And a support member for supporting the filter body, and a check valve abutting contact member capable of abutting the check valve in the valve opening direction of the check valve at the inlet. An oil filter characterized by being configured integrally with a member. 2. The oil filter according to claim 1, wherein the support has a bypass passage for bypassing the oil introduced from the introduction port. 3. The oil filter according to claim 2, wherein the check valve has an annular bypass valve body that closes the bypass passage, and these are integrally formed. . 4. The C-shaped ring spring plate for urging the bypass valve body toward the support body is provided inside the annular bypass valve body according to claim 3. Oil filter to do. 5. The oil filter according to claim 3, wherein the check valve and the bypass valve body are integrally formed of rubber.