JP2000279711A - Filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter device which puts together parts, such as holders, by utilizing the force of spring members constituting relief valves. SOLUTION: The filter device is provided with the holder 10 which is inserted to the inner periphery of a filter element 3, a guide 20 which has a fitting part 22 to be combined with the holder 10 on one end side of the filter element 3 and a connecting hole 24 for connecting the dirty side S1 and clean side S2 in a filter case, a valve disk 30 which is inserted into the fitting part 22 of the guide 20 and opens and closes the connecting hole 24 and a coil spring 31 which is mounted in a compressed state between the valve disk 30 and a spring rest part 15 disposed in the holder 10 and energizes the valve disk 30 toward the connecting hole 24. The holder 10 is provided with a pawl part 23 and the guide 20 with a groove part 16, respectively. The pawl part 23 is engaged with the groove part 16, by which the holder 10 and the guide 20 are blocked to each other with respect to the axial direction of the holder 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a filter device provided with a relief valve for securing a flow path when a filter element is clogged.

[0002]

2. Description of the Related Art An oil filter device used for filtering engine oil of an automobile is provided with an oil flow path when a filter element is clogged.
A relief valve is installed that opens and closes based on the pressure difference between the dirty side and the clean side. As this kind of relief valve, for example, as described in Japanese Utility Model Application Laid-Open No. 58-14913 and Japanese Utility Model Application Laid-Open No. 64-5607, a dirty side and a clean side are attached to an end plate attached to one end of a filter element. To form a communication hole connecting
A valve body capable of closing the communication hole is arranged inside the holder that supports the filter element from the center side, and a coil spring is mounted between the valve body and the spring receiving part of the holder, and the repulsive force of the coil spring It has been proposed to urge the valve body toward the communication hole.

[0003]

The filter device described in the above-mentioned conventional publication has a structure in which a filter element, a holder and an end plate are bonded to each other and integrated, and only the filter element is removed from the holder. Cannot be replaced. In recent years, a structure in which the filter element and the holder are not adhered to each other but the holder is simply inserted into the filter element has been adopted for the sake of recycling. In this case, if the holder and the end plate adhered to the filter element are configured as separate parts independent of the filter element, the number of parts to be disassembled or reassembled when the filter element is replaced increases, and the replacement of the element is increased. It takes time and effort.

Accordingly, an object of the present invention is to provide a filter device in which components such as a holder are integrated by utilizing the force of a spring member constituting a relief valve, thereby reducing the labor required when replacing a filter element. I do.

[0005]

Hereinafter, the present invention will be described. In addition, in order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are added in parentheses, but the present invention is not limited to the illustrated embodiment.

According to a first aspect of the present invention, a holder (10) inserted into the inner periphery of a cylindrical filter element (3) and a fitting portion (22) combined with the holder at one end of the filter element. A guide (20) having a communication hole (24) connecting the dirty side (S1) and the clean side (S2) in the filter case (2); A spring member (30) which is mounted in a compressed state between a valve body (30) that opens and closes and a spring receiving portion (15) provided on the holder and urges the valve body toward the communication hole. 31)
And a claw (23, 18) is provided on one of the fitting portion of the holder and the guide, and a groove (16, 26) is provided on the other, and the claw is The above-mentioned problem is solved by the filter device (1A, 1B) in which the holder and the guide are engaged with the groove and are prevented from coming off from each other in the axial direction of the holder.

According to the present invention, the valve body is pressed against the valve seat around the communication hole by the force of the spring member to close the communication hole, and at the same time, the holder is urged away from the guide by the spring force. The claw is pressed against the wall of the groove. Thus, the holder is restrained at a fixed position with respect to the guide, and the holder, the guide, the valve body, and the spring member can be handled as a single component integrally assembled. Accordingly, the number of disassembly work and re-assembly work required when replacing the filter element are reduced, and the labor is reduced.

According to a second aspect of the present invention, in the filter device according to the first aspect, the filter case (2) includes a base (4) and a cap (5) detachable from the base. The cap and the guide (20)
And are joined to each other.

According to the present invention, since the guide, holder, valve body and coil spring are integrally assembled to the cap, the guide, valve body, spring member and filter element are integrated by simply removing the cap from the base. It can be taken out of the filter case. Therefore, the used filter element can be removed from the holder, a new filter element can be mounted on the holder, and then the filter element can be replaced with a minimum number of steps for attaching the cap to the base.

In the above invention, the fitting portion (22) of the guide is configured to fit on the inner peripheral side of the holder (10), and the claw portion (23) is provided at the tip of the fitting portion. ,
Each of the grooves (16) may be formed in the holder. A fitting portion (22) of the guide is configured to fit on the outer peripheral side of the holder (10), and the claw portion (18) is provided on a portion of the holder inserted into the fitting portion.
However, the groove (26) may be formed in the fitting portion.

[0011]

FIG. 1 shows a filter device 1A to which the present invention is applied. This filter device 1A has a filter case 2 and a filter element 3 housed therein. Filter case 2 is base 4
And the cap 5. The base 4 has a manifold section 6 and a cylindrical section 7. The manifold section 6 has an inflow path 6a through which dirty oil discharged from an automobile engine is guided, and an outflow path 6b through which clean oil filtered by the filter element 3 is discharged.
Are formed respectively. Inflow channel 6a and outflow channel 6
One end of b opens to the mounting surface 6c to the engine block,
The other end opens inside the cylindrical portion 7.

The cap 5 is a molded product made of resin, and has a male screw 5a at the tip and a flange 5 at the outer periphery.
b are provided respectively. Flange 5b is cylindrical part 7
The male thread 5a of the cap 5 is screwed into the female thread 7a of the cylindrical part 7 until the base 4
And the cap 5 are interconnected. The joint between the cap 5 and the base 4 is sealed by an O-ring 8.

The filter element 3 is a well-known filter element in which a predetermined filter medium is bent in a zigzag manner along a circumferential direction to form a substantially cylindrical shape having a large number of folds. At both ends of the filter element 3, sealing materials 3 a, 3 a such as hot melt for closing an opening communicating with the inner peripheral side of the filter element 3.
And a ring-shaped seal plate 3
b and 3b are joined.

A holder 10 is mounted on the inner peripheral side of the filter element 3. The holder 10 is a molded product made of resin, and has a pair of cylindrical portions 11 and 12 disposed at both ends thereof.
A plurality of (for example, four) longitudinal ribs 13... 13 extending in the axial direction so as to connect the cylindrical portions 11 and 12;
And a plurality of ring-shaped transverse ribs 14... The filter element 3 is fitted on the outer periphery of the cylindrical portions 11 and 12 at both ends and held coaxially with the holder 10. The cylindrical portion 11 at the lower end of the holder 10 is provided at the entrance of the outflow passage 6b and fits into the enlarged portion 6e. As a result, the holder 10 and the filter element 3 held thereby are positioned coaxially with the cylindrical portion 7.

As shown in detail in FIG.
The projections 5c... 5 are provided on the inner bottom (upper side of FIGS.
c are provided, and a resin guide 20 is joined to their ends by welding. The guide 20 has a disk-shaped plate portion 21 and a fitting portion 22 provided coaxially at the center of the plate portion 21. Fitting part 22
Is divided into a plurality of partial walls 22a by slits 22b, and a claw portion 23 is provided at a lower end of each partial wall 22a. As the claw portion 23 moves toward its tip (lower end), the guide 2
It is formed in the shape of a wedge that recedes toward the center of 0. A communication hole 24 is provided at the center of the plate portion 21, and a valve 30 for opening and closing the communication hole 24 and the valve 30 are pressed against a valve seat 25 around the communication hole 24 inside the fitting portion 22. Coil spring 31 is mounted. A spring receiving portion 15 for receiving the coil spring 31 is integrally formed inside one horizontal rib 14 of the holder 10.

The cap 5, the holder 10, the valve body 30, and the coil spring 31 are assembled as a sub-assembly according to the following procedure.

First, the valve body 30 and the coil spring 31 are inserted inside the fitting portion 22. Next, the cylindrical part 12 and the fitting part 22 of the holder 10 are positioned coaxially. Then, the holder 10 is pushed into the outer periphery of the fitting portion 22 until the cylindrical portion 12 substantially contacts the plate portion 21. Thereby, the claw portion 2
3 is fitted into the opening (groove) 16 between the lateral ribs 14, 14 of the holder 10, and the coil spring 31 is restrained in a compressed state between the valve body 30 and the spring receiving portion 15 of the holder 10. Due to the repulsive force of the coil spring 31, the valve body 30 is moved to the valve seat 25.
, And the claw portion 23 is pressed against the horizontal rib 14. As a result, the communication hole 24 is closed by the valve body 30, and the holder 10 and the guide 20 are prevented from coming off from each other in the axial direction. As a result, the cap 5, the holder 10, the valve body 30, and the coil spring 31 are integrated. Is combined with The guide 20, the holder 10, the valve body 30, and the coil spring 31 constitute a relief valve 40.

The filter element 3 is mounted on the outer periphery of the holder 10 mounted on the cap 5, and thereafter the cap 5 is mounted.
Is attached to the base 4, the seal plates 3b, 3b at both ends of the filter element 3 are in close contact with the seal receiving surface 6d of the base 4 and the plate portion 21 of the guide 20, respectively. As a result, the inside of the filter case 2 becomes the inflow path 6a.
Oil flowing into the dirty side S1 into the outflow passage 6b and the filter element 3
Flows radially into the clean side S2,
Further, it is returned to the engine from the outflow passage 6b. When the filter element 3 is clogged and the pressure difference between the dirty side S1 and the clean side S2 increases to a predetermined value or more,
The valve element 30 overcomes the force of the coil spring 31 and separates from the valve seat 25, thereby opening the communication hole 24 and securing the oil flow path.

When replacing the filter element 3,
Remove the cap 5 from the base 4. Thus, the cap 5, the guide 20, the holder 10, and the filter element 3 are integrally removed from the base 4. After this,
The filter element 3 is removed from the holder 10 and replaced with another filter element 3.

FIGS. 3 and 4 show another embodiment of the present invention. However, the same parts as those in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted. The filter device 1B of FIGS. 3 and 4 differs from the filter device 1A of FIGS. 1 and 2 described above in that the cylindrical portion 12 at the upper end of the holder 10 is fitted inside the fitting portion 22 of the guide 20. Holder 1
Arms 17... 17 extend from the cylindrical portion 12 along the gap between the vertical ribs 13, and claw portions 18 are provided at the free ends of the arms 17. On the other hand, the fitting portion 22 of the guide 20 is formed in a cylindrical shape capable of holding one end of the filter element 3 from the inner peripheral side.
(Grooves) 26...

Also in this embodiment, if the coil spring 31 and the valve body 30 are mounted on the spring receiving portion 15 of the holder 10 and the holder 10 is inserted inside the fitting portion 22 in this state, the claw portion 18 is opened. The coil spring 31 is engaged with the portion 26 to be restrained in a compressed state between the valve body 30 and the spring receiving portion 15 of the holder 10. The repulsive force of the coil spring 31 causes the valve element 3
0 is pressed against the valve seat 25, and the claw portion 18 is pressed against the lower wall surface of the opening 26. Thereby, the communication hole 24
Is closed by the valve body 30, and the holder 10 and the guide 20 are prevented from coming off from each other in the axial direction. As a result, the cap 5, the holder 10, the valve body 30 and the coil spring 31 are integrally combined. And Guide 2
The relief valve 40 is constituted by the holder 0, the holder 10, the valve body 30 and the coil spring 31. The operation of the relief valve 40 and the procedure for replacing the filter element 3 are shown in FIGS.
Is the same as the example.

The present invention is not limited to the above embodiments, but may be implemented in various forms. For example, the spring receiving portion 15 does not need to be formed integrally with the lateral rib 14 and may be provided at an arbitrary position on the holder 10. In the examples of FIGS. 1 and 2, the claw portion 23 may be locked to the cylindrical portion 12. The filter element 3 is not limited to a zigzag shape.

[0023]

As described above, according to the filter device of the present invention, the claw provided on the holder or the guide is formed by utilizing the force of the spring member constituting the relief valve. To hold the holder in place with respect to the guide. As a result, the holder, the guide, the valve element, and the spring member can be handled as a single part integrally assembled. As a result, the number of disassembly and reassembly operations required when replacing the filter element is reduced. This reduces the effort required.

In particular, when the guide and the cap of the filter case are joined by welding or the like, the cap is removed from the base, the used filter element is removed from the holder, and a new filter element is mounted on the holder. In addition, the filter element can be replaced with a minimum number of steps required to attach the cap to the base.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a filter device to which the present invention is applied.

FIG. 2 is an enlarged view showing the vicinity of a relief valve of the filter device of FIG. 1;

FIG. 3 is a diagram showing an embodiment in which a part of FIG. 2 is modified.

FIG. 4 shows a guide, a holder, and a filter in the filter device of FIG.
FIG. 3 is an exploded view of the valve body and the coil spring.

[Explanation of symbols]

 1A, 1B Filter device 2 Filter case 3 Filter element 4 Base 5 Cap 10 Holder 15 Spring receiver 16, 26 Opening (groove) 18, 23 Claw 20 Guide 22 Fitting 24 Communication hole 25 Valve seat 30 Valve 31 Coil spring (spring member) 40 Relief valve S1 Dirty side S2 Clean side

Continued on the front page (72) Inventor Takeo Sugimoto 7800 Nakase Nakase, Hamakita City, Shizuoka Pref. Inside Toyo Maru Machine Manufacturing Co., Ltd. (72) Inventor Riki Shimomura 7800 Nakase Nakase, Hamakita City, Shizuoka Pref.Toyo Maru Machine Manufacturing Co., Ltd. F term (reference) 3G015 BG14 BG16 DA04 DA11 4D026 AB02 AB11 AC02 4D064 DD01 DE04

Claims (4)

[Claims] 1. A holder inserted into the inner periphery of a cylindrical filter element, and a connection connecting one end side of the filter element with a fitting portion combined with the holder and a dirty side and a clean side in a filter case. A guide having a hole, a valve plug inserted into the fitting portion of the guide to open and close the communication hole, and a valve mounted in a compressed state between the valve plug and a spring receiving portion provided on the holder. A spring member for urging the valve body toward the communication hole, wherein one of the fitting portion of the holder and the guide is provided with a claw portion, and the other is provided with a groove portion, A filter device, wherein a claw portion is engaged with the groove portion so that the holder and the guide are prevented from coming off from each other in the axial direction of the holder. 2. The filter case according to claim 1, wherein the filter case includes a base and a cap detachable from the base, and the cap and the guide are joined to each other. Filter device. 3. The fitting portion of the guide is configured to be fitted on the inner peripheral side of the holder, and the claw portion is formed at a tip of the fitting portion, and the groove portion is formed on the holder. The filter device according to claim 1, wherein: 4. A fitting portion of the guide is configured to be fitted on an outer peripheral side of the holder, wherein the claw portion is provided at a portion of the holder inserted into the fitting portion, and the groove portion is provided at the fitting portion. The filter device according to claim 1, wherein each of the filter devices is formed.