JPH1082464A - Sealing elastic body and oil filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the size of a gasket and fastening force from increasing, and reduce a contact area by making the compression direction length of a first member long, making the compression direction length of a second member short, and forming the second member in a structure as a stopper in which access limit of one side and the other side of a connecting part are determined. SOLUTION: In an annular gasket 12, an annular elastic body 13 made of a bridge body of a nitrile rubber is provided with a crest shaped annular projection 13a which is biased toward a left side, a steel made cross section vertical square annular stopper molding body 13b is fitted and mounted into an annular part of its right side, and its bottom surface is exposed. When the annular elastic body 13 projected upward is received compression force, deformation is built up, and pressure exceeds in the vicinity of the stopper molding body 13b, the stopper molding body 13b is functioned as a stopper so as to suppress or block the further deformation. It is thus possible to prevent the size and fastening force of a gasket from increasing, and it is also possible to reduce a contact area.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sealing elastic body such as a gasket attached to an oil filter when the oil filter is mounted on an automobile, and an oil filter using the same.

[0002]

2. Description of the Related Art Machine industry, precision machine industry, automobile industry,
In the pressure vessel industry and the like, sealing elastic bodies such as packings and gaskets are used to seal the joints of machines and containers, and these are manufactured in the seal material industry. Conventional packings and gaskets use an elastic body of a processed product made of an elastic material alone, such as rubber, and sealing is performed between these two sides on one side and the other side of the connecting portion. For the purpose of sealing by maintaining the state with the elastic body interposed and compressing and deforming it, and to suppress the excessive deformation at the same time as the elastic deformation between the two to cause the compressive deformation In some cases, a member around one of the two is used as a stopper, and the stopper limits the approach limit between the two.

[0003] For example, in the case of an oil filter for an internal combustion engine of an automobile or the like, as shown in FIG.
And a filter element 5 holding the fold filter paper 2b provided around the cylindrical body 2a between the extension of the support member 3 and the frame member 4 provided at the upper end of the cylindrical body 2a. Next, the inside of the cylindrical portion provided at the central opening of the support member 3 is supported on the outside of the cylindrical portion of the reinforce plate 6 having the oil inlets 6a... And this reinforce plate 6
, The open end of the case 1 is closed, the base end cylindrical portion of the check valve 7 made of rubber is fitted to the outer side of the cylindrical portion of the support member 3, and the oil inlets 6a. Cover with valve body. Then, the reinforce plate 6 is supported by a closure plate 8 wound around the open end of the case 1, while the cylindrical body 2 a provided with the frame member 4 is pressed by a leaf spring 9 to push the filter element 5 to the reinforce plate. 6 and between the leaf spring 9 and the closure plate 8. Closure plate 8
Is provided with an annular groove 8a at the tip thereof, and the gasket 1
0 is attached. In addition, an opening is provided in the center of the leaf spring 9, and a valve plate that moves up and down by the spring faces the opening.
A flow hole is provided in the housing body that houses the spring, and these constitute the safety valve device 11. In such a structure, the threaded portion inside the cylindrical portion of the reinforce plate 6, that is, one side of the connecting portion is screwed into the mounting portion of the internal combustion engine, that is, the threaded portion on the other side of the connecting portion, and the gasket 10 is attached to the mounting portion. Is deformed in close contact with the end face on the base end side, and sealing is performed by its resilient elasticity. Then, oil flows from the oil inlets 6a,... Through a path not shown, and the check valve 7 is opened by the oil pressure, whereby the oil is introduced into the cylindrical body 2a through the fold filter paper 2b. Is supplied to the internal combustion engine through the cylindrical portion and the mounting portion. When the fold filter paper 2b is clogged, the oil flows to the side of the safety valve device 11, and this device is operated by the hydraulic pressure. Therefore, the oil is introduced into the cylindrical body 2a, and the oil is supplied to the internal combustion engine in the same manner. . As a method of performing the above-mentioned sealing in such an oil filter, there are two cases: a case where the base end side surface of the mounting portion is brought into contact with only the gasket 10 and the sealing is performed only by the restoring elastic force;
In some cases, a protrusion is formed around the peripheral portion or the tightening portion 8b serving as a stopper to prevent the proximal end surface of the mounting portion from advancing, and sealing may be performed by restoring elastic force due to deformation of the gasket 10 in that state. .

[0004]

However, in the case of sealing only with the gasket described above, the gasket itself needs to have a stopper function in a state close to its deformation limit. The gasket tends to have a large gasket and a large contact area with the base end face of the mounting portion, requiring a large force when tightening the gasket. Further, since the gasket is brought into close contact with the proximal end surface of the mounting portion while the screw portion inside the reinforce plate 6 is screwed into the screw portion of the mounting portion of the internal combustion engine, the gasket is compressed. It is difficult to tighten, and if the tightening is loose, the seal will be incomplete and there is a danger of oil leakage,
If the tightening is too strong, the gasket will be deteriorated due to excessive deformation, and its restoring elasticity will be reduced, and the function of the seal will be impaired. If the deformation is excessive, the gasket will be broken. When the stopper is used, it is necessary to provide a protrusion around the winding portion of the closure plate 8 and the annular groove at the tip thereof and use the protrusion as a stopper. Since the shape, arrangement and attachment of the closure plate 8 have to be adjusted in the process of tightening the closure plate 8 in particular, the process accuracy must be improved and the process must be complicated. is there.

A first object of the present invention is to provide an elastic body for sealing which does not increase in size, requires only a small contact area, and does not increase in tightening force, and an oil filter using the same. A second object of the present invention is to provide an elastic body for sealing that does not require fine adjustment of the tightening force, and an oil filter using the same. A third object of the present invention is to provide a sealing elastic body in which deterioration due to excessive deformation is not promoted, and an oil filter using the same. A fourth object of the present invention is to provide a sealing elastic body and an oil filter which do not need to improve the processing accuracy such as the shape, arrangement, and attachment of a reinforce plate and a closure plate. A fifth object of the present invention is to provide an oil filter which has a wide range of choices in processing steps and can improve productivity.

[0006]

According to the present invention, there is provided a sealing elastic body interposed between one side and the other side of a connecting portion through which a fluid flows. A composite of a first member having a large deformation with respect to compression and a second member having a small deformation with respect to compression, wherein the length of the first member in the direction of compression is longer and the second member is longer. The second member is a sealing member which is short and has a structure as a stopper which determines an access limit between one side and the other side of the connecting portion. Also,
In the present invention, the member whose deformation is small with respect to compression is a stopper molded body made of a non-compressible hard material (1).
The component in the direction in which the compressive force is applied until the compressive force is applied to the second member having the structure as the sealing elastic body, (3), and the stopper is the component made by the first member. ) Or (2) the elastic body for sealing,
(4) The other end open end of the case closed at one end containing the filtration element is closed by a reinforce plate having an oil inlet and an oil outlet, and the reinforce plate is supported on the periphery of the open end and elastic for sealing. (5) An oil filter having a structure in which a closure plate having a groove for holding a body is wound and fixed, wherein the sealing elastic body according to any one of (1) to (3) is installed in the groove. The bottom surface of the second member of the sealing elastic body is exposed, and the bottom surface contacts the bottom surface of the groove of the closure plate, and the tip position of the second member protruding from the bottom surface of the groove winds and fixes the closure plate. The above (4) which is the same horizontal position as the position where the outermost part of the closed portion and the closure plate protrudes. There is provided a of the oil filter.

Next, the present invention will be described in detail. In the present invention, “the first member having a large deformation with respect to compression”
Elasticity composed of commonly used elastic materials such as nitrile rubber (NBR), synthetic rubber such as styrene-butadiene rubber (SBR), synthetic rubber such as acrylic rubber and silicone rubber, natural rubber, and resins, and other elastic materials. Body. The “second member that is less deformable with respect to compression” is a molded body for a stopper made of a material having higher hardness and less deformability than the above elastic material. The elastic body for sealing of the present invention has at least one of each of these elastic bodies and the molded body for stopper.
It may be composed of one or more materials. The molded body for the stopper of the second member “has a structure as a stopper that determines an access limit between one side and the other side in the connecting portion”.
It is preferable that a molded body made of an incompressible material with respect to the compressive force at the time of tightening, for example, iron, aluminum,
Plates made of materials such as engineering plastics,
Various shapes such as tubular, L-shaped, and U-shaped can be mentioned, but depending on the compressive force at the time of tightening, a hard rubber or the like can be used, and a material having some elasticity substantially has a function of a stopper. I just need.

[0008] The phrase "the length of the first member is longer in the compression direction and the length of the second member is shorter" means that, when the connecting portion is, for example, a connecting portion of a tube portion or a cylindrical portion, the connecting portion is connected in the axial direction. The length means that the length of the first member is longer than the length of the second member, and the “compression direction” may be the “direction in which the connecting portions are connected”. When tightening the sealing elastic by approaching the other side, first
The elastic body of the member deforms and the deformation continues,
When the tightening force reaches the second member, the second member functions as a stopper and suppresses or prevents further deformation of the first member. Further, the sealing elastic body of the present invention is a composite of a first member and a second member, and the composite is obtained by adding the above-mentioned molded body of the second member to the above-mentioned elastic body of the first member. When embedding, that is, when the molded body is covered with an elastic body so as not to be seen from the outside, and when fitting, that is, when a part of the molded body is exposed and the other part is covered with the elastic body, An elastic body may be laminated on the molded body. In such a composite, it is preferable that “the component in the direction in which the compressive force is applied until the compressive force is applied to the second member having the structure as the stopper is the component formed by the first member”. This is because it is preferable that only the first member exists in the compression direction that causes deformation, and that the second member does not exist, in that the amount of deformation is sufficient and the appropriate restoring elastic force is secured. is there. In order to further increase the amount of deformation, a space may be provided inside the first member, one or both of the second member and both.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 4, reference numeral 12 denotes an annular gasket as an elastic body for sealing.
An annular elastic body 13 made of a cross-linked body has a mountain-shaped annular protrusion 13a deflected to the left, and a steel annular molded body 13b having a vertically long rectangular cross section is fitted into an annular portion on the right side of the annular elastic body 13; The bottom is exposed. In addition,
The term “fitting and interior” refers to the case where it is structurally grasped, and such an elastic body for sealing is formed by inserting a molded body for an annular stopper into a material of NBR in a mold and vulcanizing the same to form an integrated composite. Is obtained as Further, an annular gasket as shown in FIGS. 5 to 7, that is, an annular stopper molded body 14b on one side of an annular elastic body 14a having an inverted V-shaped cross section, a bifurcated upper side of the chevron, and an annular projection 2
The annular stopper molded body 16b is fitted into the center of the ring-shaped elastic body 16a, and the annular stopper molded body 17b is fitted on the short side of one side of a rectangular annular elastic body 17a having the left side inclined to the right and the upper side inclined downward. As shown in FIG. 8, an annular elastic body 18a having an annular protrusion is laminated on a concave annular stopper molded body 18b to form an annular gasket 18, as shown in FIG. The molded body for the stopper is a plate-shaped annular body with a rectangular cross section that is vertically long in cross section, and the bottom is located on the same plane as the flat bottom of each annular elastic body and exposed, and the other parts of the molded body for the annular stopper are annularly elastic. It may be covered with a body. In these structures, the upwardly projecting portion of the annular elastic body is subjected to a compressive force, and only the elastic body is present in the compression direction. When the deformation progresses and the compression reaches, for example, the vicinity of the stopper molded body indicated by a chain line, further deformation is suppressed or prevented, and the stopper molded body can function as a stopper.
The elastic body for sealing includes gaskets, packings and the like, and can be used not only for oil filters but also for filter devices for fluids such as oils and other liquids and gases.

Next, the case of an oil filter will be described. The same reference numerals as those in FIG. 9 denote the same components as in FIGS. 1 and 2, the periphery of the closure plate 8 on the open side of the annular groove 8a is projected outward from the tightening portion 8b of the closure plate. The annular gasket 16 shown in FIG. 6 is installed by caulking. At this time, the tip position of the molded body is located on the same horizontal plane as the tip position around the open side of the annular groove 8a. In this way, as shown in FIG. 3, when the screw portion inside the cylindrical portion of the reinforce plate 6 is screwed and connected to the screw portion of the mounting portion 19 of the internal combustion engine, as described above, the annular shape of the elastic body 16 for sealing is used. The protrusion protruding upward from the elastic body 16a is compressed by the base end surface 20 of the mounting portion 22, and the deformation is well performed only in the elastic body 16a alone. At the stage where the base end surface of the mounting portion reaches the horizontal line a by 16b, its progress is prevented, and in this state, sealing is performed by restoring elastic force due to deformation of the annular elastic body 16a. As described above, when the advancement of the base end side surface of the mounting portion is prevented by the annular stopper molded body, the deformation by the annular elastic body 16a can be made constant, the restoring elastic force can be kept constant, and the adjustment is necessary. In addition, since the periphery of the annular groove 8a of the closure plate 8 on the open side and the tightening portion 8b do not need to function as a stopper, the processing accuracy in the shape, arrangement, mounting and the like of these and the reinforcement plate 6 and the like are not required. In addition, the protrusion of the annular elastic body exhibits an appropriate restoring elastic force and suppresses excessive deformation, so that its function can be maintained for a long time without deterioration. After the oil filter is installed in this manner, the oil supply hole 2
Oil is supplied from 1 and the oil is filtered and supplied to the internal combustion engine in the same manner as described with reference to FIG.
The above description is for an oil filter for automobiles, but may be an oil filter for other machinery and containers.

[0011]

EXAMPLES The present invention will be described in more detail with reference to the following Examples, but it should not be construed that the present invention is limited thereto. Example 1 In FIG. 2, the height A from the bottom surface of the annular groove 8a to its open end and the height D of the molded body for annular stopper are 3.5 mm of the same size, and the height of the annular elastic body of the annular gasket 16 is 3.5 mm. The height B from the bottom surface is 4.4 to 4.6 mm, and the height C from the bottom surface of the valley between the protrusions is 3.6 to 4.6 mm.
3.8 mm, the bottom width is 4.9 to 5.1 mm, the width of the annular stopper molded body is 2.0 mm, and the screw portion inside the cylindrical portion of the reinforce plate 6 is the screw portion of the mounting portion 19 of the internal combustion engine. And the annular gasket 16 was tightened, and the tightening torque when the protruding portion of the annular elastic body 16a was compressed by 0.3 mm was measured to be 124 Kgcm.
Met. In the above, the tightening torque is set to 150
The oil was supplied at an oil temperature of 130 ° C. and an oil flow rate of 20 liter / min, filtered, and introduced into the internal combustion engine for 48 hours, and a durability test was performed to measure the limit pressure resistance before and after the supply. The critical pressure resistance before and after the test was not changed at 20 kg / cm ² or more. The result is that, instead of the annular gasket 16, a conventional annular gasket of a solid body having an inverted V-shaped cross section and the same height is used instead of the annular gasket 16, and the annular groove 8 of the closure plate 8 is used.
The result was the same as when a stopper was used around the open end of a. In addition, the limit withstand pressure is in accordance with JIS D1611.
This refers to the pressure at which oil pressure is gradually applied to the oil filter to cause oil leakage from the gasket portion.

COMPARATIVE EXAMPLE 1 In Example 1, an annular gasket was used instead of the annular gasket 16, which was a solid body having a substantially square cross section with a width of 5.0 mm and a height of 4.5 mm and the same material as the elastic body of the annular gasket 16. An oil filter was obtained in the same manner except that 10 (FIG. 9) was used, and the same test was performed as in Example 1. As a result, the tightening torque required to compress the annular gasket by 0.3 mm was 212 kgcm. .

From the above results, it can be understood that the oil filter of the first embodiment has the same performance as that of the conventional filter of the first comparative example with the limit pressure resistance indicating oil leakage from the gasket portion, and has a smaller tightening torque. . When the torque is small as described above, the mechanical strength of the members around the connecting portion can be reduced, and the degree of freedom in designing the oil filter in the shape, arrangement, mounting, and the like of the closure plate, the reinforcement plate, and the like can be increased. it can.

[0014]

According to the present invention, since the sealing elastic body is constituted by the composite of the first member and the second member having different degrees of deformation with respect to compression, the size does not increase.
An elastic body for sealing, which does not require a small contact area, does not increase the tightening force, does not require fine adjustment of the tightening force, and does not promote deterioration due to excessive deformation, and an oil filter using the same. Can be provided. In addition, it is possible to provide a sealing elastic body and an oil filter that do not need to improve the processing accuracy such as the shape, arrangement, and mounting of the reinforcement plate, the closure plate, and the like.
An oil filter that can improve productivity can be provided.

[Brief description of the drawings]

FIG. 1 is a partial sectional view of one embodiment of an oil filter of the present invention.

FIG. 2 is a partially enlarged cross-sectional view thereof.

FIG. 3 is an explanatory cross-sectional view of the used state.

FIG. 4 is a longitudinal sectional view of the annular gasket according to the first embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a part of an annular gasket according to a second embodiment of the present invention.

FIG. 6 is a longitudinal sectional view of a part of an annular gasket according to a third embodiment of the present invention.

FIG. 7 is a longitudinal sectional view of a part of an annular gasket according to a fourth embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of a part of an annular gasket according to a fifth embodiment of the present invention.

FIG. 9 is a partially sectional explanatory view of a conventional oil filter.

[Brief description of reference numerals]

6 Reinforce plate 12, 14, 16, 17, 18 as one side of connecting portion Annular gasket 13, 14a, 16a, 17a, 18a as sealing elastic body Annular elastic body 13b, 14b as first member 16b, 17b, 18b Formed body for annular stopper as second member 19 Mounting part of internal combustion engine as the other side of connection part

Claims (5)

[Claims] 1. A sealing member interposed between one side and the other side of a connecting portion through which a fluid flows, wherein a first member having a large deformation with respect to compression and a small member having a small deformation with respect to compression. A composite of a second member, wherein the length in the direction of compression is such that the first member is longer and the second member is shorter, and the second member is connected to one side and the other side of the connecting portion. An elastic body for sealing that has a structure as a stopper that determines the side's approach limit. 2. The elastic body for sealing according to claim 1, wherein the member having a small deformation with respect to the compression is a non-deformed stopper molded body made of an incompressible hard material. 3. A component in a direction in which a compressive force is applied to the second member having a structure as a stopper until a compressive force is applied is a component of the first member.
Or the elastic body for sealing according to 2. 4. A reinforce plate having an oil inlet and an oil outlet is closed at an open end on the other end of the case closed at one end containing the filter element, and the reinforce plate is supported on the periphery of the open end and used for sealing. 4. An oil filter having a structure in which a closure plate having a groove for holding an elastic body is fixedly wound around the oil filter, wherein the sealing elastic body according to claim 1 is installed in the groove. 5. The sealing elastic body has a bottom surface of the second member exposed, and the bottom surface is in contact with a bottom surface of a groove of the closure plate, and a tip position of the second member protruding from the bottom surface of the closure plate is a closure plate. 5. The oil filter according to claim 4, wherein the oil filter is located at the same horizontal position as a position where the outermost portion of the closure plate and the portion of the closure plate are fixed.