JP2020139625A - Gasket and oil filter - Google Patents

Abstract

To provide a gasket which can inhibit grease from leaking and protruding to the outside of a housing.SOLUTION: A gasket is an annular gasket 5 which is provided in an annular groove 4 formed at the bottom surface side of a housing 2 of an oil filter 1 and seals a space between the bottom surface side of the housing and an attachment part 8 of an internal combustion engine to which the housing is attached. A contact part 31 which contacts with an outer peripheral wall surface 4a of the annular groove is provided protruding on an outer peripheral surface 5a. The contact part contacts with the outer peripheral wall surface of the annular groove to form a storage gap 35 which stores grease 26 applied to a surface 5b of the gasket between the outer peripheral surface of the gasket and the outer peripheral wall surface of the annular groove.SELECTED DRAWING: Figure 2

Description

The present invention relates to a gasket and an oil filter, and more particularly to an annular gasket provided in an annular groove formed on the bottom surface side of the housing and an oil filter including the gasket.

As a conventional oil filter, for example, as shown in FIG. 9, in an annular groove 104 formed on the bottom surface side of the housing 102, between the bottom surface side of the housing 102 and the mounting portion 108 of the internal combustion engine to which the housing 102 is mounted. An oil filter 101 provided with an annular gasket 105 for sealing is generally known (see, for example, Patent Documents 1 to 3 and the like).

In the oil filter 101, for example, as shown in FIG. 10A, by applying grease 126 to the surface 105b of the gasket 105, appropriate lubricity can be obtained when the internal combustion engine is mounted on the mounting portion 108. It is secured and excessive deformation such as strain of the gasket 105 is suppressed. Then, in the gasket 105, for example, as shown in FIG. 10B, when the oil filter 101 is attached to the attachment portion 108 of the internal combustion engine, it is compressed in the axial direction, and the outer peripheral surface 105a thereof is annular over the entire circumference. It is in pressure contact with the outer peripheral wall surface 104a of the groove 104.

Japanese Unexamined Patent Publication No. 08-312783 Jikkenhei 05-442203 Japanese Unexamined Patent Publication No. 2004-137966

However, in the conventional gasket 105, when the oil filter 101 is attached to the mounting portion 108 of the internal combustion engine, it is compressed in the axial direction, and the outer peripheral surface 105a thereof is pressed against the outer peripheral wall surface 104a of the annular groove 104 over the entire circumference. The grease 126 applied to the surface 105b of the gasket 105 may be pushed out of the housing 102 and protrude (see, for example, FIG. 10B). This squeezed grease is liquefied after the temperature of the internal combustion engine rises, so that it is easily misjudged as an oil leak (for example, engine oil leak), which causes a complaint.

The above-mentioned Patent Document 1 discloses a configuration in which a protrusion (tab) is provided on the inner peripheral side of the gasket. Further, Patent Document 2 discloses a configuration in which a triangular beam protrusion is provided on the outer peripheral portion of the gasket. Further, Patent Document 3 discloses a configuration in which a protrusion is provided on the end plate side of the gasket. However, Patent Documents 1 to 3 do not disclose at all a configuration that suppresses the seepage of grease when the oil filter is attached to the internal combustion engine.

The present invention has been made in view of the above situation, and an object of the present invention is to provide a gasket and an oil filter capable of suppressing grease from leaking to the outside of a housing and squeezing out.

In order to solve the above problem, the invention according to claim 1 is provided in an annular groove formed on the bottom surface side of the oil filter housing, and the bottom surface side of the housing and the mounting of an internal combustion engine to which the housing is attached. An annular gasket that seals between the parts, and a contact portion that contacts the outer peripheral wall surface of the annular groove is provided on the outer peripheral surface thereof, and the contact portion is formed on the annular groove. The gist is that by abutting against the outer peripheral wall surface, a storage gap for accommodating the grease applied to the surface of the gasket is formed between the outer peripheral surface of the gasket and the outer peripheral wall surface of the annular groove.
The gist of the invention according to claim 2 is that, in the invention according to claim 1, a plurality of the contact portions are provided along the circumferential direction of the gasket.
The gist of the invention according to claim 3 is that, in the invention according to claim 2, each of the plurality of abutting portions is formed in an elongated shape in the axial direction of the gasket.
The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the oil filter includes the casing and a filter element arranged in the casing, and the housing. Is joined to a cylindrical casing having an open bottom, an end plate provided with an oil inlet and an outlet while closing the bottom opening of the casing, and the bottom surface of the end plate, and of the casing. The closure plate comprises a closure plate provided with a winding portion to be wound around the peripheral edge of the opening end, and the closure plate includes a bent extending portion extending inward in the radial direction of the casing from the winding portion. The gist is that the annular groove is formed by the winding portion and the extending portion.
In order to solve the above problem, the invention according to claim 5 includes a housing, a filter element arranged in the housing, and the annular groove formed on the bottom surface side of the housing. An oil filter provided with an annular gasket that seals between the bottom surface side of the housing and the mounting portion of the internal combustion engine to which the housing is mounted. The gasket has an outer peripheral surface of the annular groove on the outer peripheral surface thereof. A contact portion that comes into contact with the wall surface is provided so as to project, and when the contact portion contacts the outer peripheral wall surface of the annular groove, the gasket is formed between the outer peripheral surface of the gasket and the outer peripheral wall surface of the annular groove. The gist is that a housing gap is formed to store the grease applied to the surface of the.

According to the gasket of the present invention, a contact portion that abuts on the outer peripheral wall surface of the annular groove is provided so as to project on the outer peripheral surface thereof, and the contact portion abuts on the outer peripheral wall surface of the annular groove, whereby the outer circumference of the gasket A storage gap for accommodating the grease applied to the surface of the gasket is formed between the surface and the outer peripheral wall surface of the annular groove. As a result, when the oil filter is attached to the mounting portion of the internal combustion engine, the grease applied to the surface of the gasket is contained in the accommodating gap, so that the grease is prevented from leaking to the outside of the housing and protruding. Grease. Further, even if the grease is liquefied after the temperature of the internal combustion engine rises, the liquefied grease is retained in the accommodating gap due to the capillary phenomenon of the minute accommodating gap.
Further, when a plurality of the contact portions are provided along the circumferential direction of the gasket, a plurality of minute accommodating gaps are formed along the circumferential direction of the gasket. Therefore, the liquefied grease is effectively retained by the capillary phenomenon of each minute accommodation space.
Further, when each of the plurality of abutting portions is formed in a long shape in the axial direction of the gasket, the axial length of the gasket in each of the minute accommodating spaces becomes long. Therefore, the liquefied grease is more effectively retained by the capillary phenomenon of each minute accommodating space. Further, the contact of the contact portion prevents the gasket from falling to the outside.
Further, the oil filter includes the housing and a filter element, the housing has a casing, an end plate, and a closure plate, and the closure plate is from the winding portion to the casing. When the annular groove is formed by the winding portion and the extending portion, the contact portion hits the inner peripheral surface of the winding portion with a bent extending portion extending inward in the radial direction. By contacting the gasket, a storage gap is formed between the outer peripheral surface of the gasket and the inner peripheral surface of the winding portion.
According to the oil filter of the present invention, the gasket is provided with a contact portion that abuts on the outer peripheral wall surface of the annular groove so as to protrude from the outer peripheral surface thereof, and the contact portion abuts on the outer peripheral wall surface of the annular groove. A storage gap for accommodating the grease applied to the surface of the gasket is formed between the outer peripheral surface of the gasket and the outer peripheral wall surface of the annular groove. As a result, when the oil filter is attached to the mounting portion of the internal combustion engine, the grease applied to the surface of the gasket is contained in the accommodating gap, so that the grease is prevented from leaking to the outside of the housing and protruding. Grease. Further, even if the grease is liquefied after the temperature of the internal combustion engine rises, the liquefied grease is retained in the accommodating gap due to the capillary phenomenon of the minute accommodating gap.

The present invention will be further described in the following detailed description with reference to the plurality of references mentioned with reference to non-limiting examples of typical embodiments according to the invention. Similar parts are shown through several figures.
It is a vertical sectional view of the oil filter provided with the gasket according to the Example. It is an enlarged view of the Ⅱ arrow view part of FIG. 1, (a) shows the state before attaching to an internal combustion engine, and (b) shows the state attached to an internal combustion engine. FIG. 3 is a view taken along the line III of FIG. FIG. 2 is a sectional view taken along line IV-IV of FIG. It is a partial perspective view of the said gasket. It is explanatory drawing for demonstrating the gasket which concerns on another form, (a) shows the state before attaching to an internal combustion engine, and (b) shows the state attached to an internal combustion engine. It is a partial perspective view of the said gasket. It is a partial perspective view of the gasket which concerns on further another form. It is a vertical sectional view of the conventional oil filter. It is an enlarged view of the X arrow view part of FIG. 9, (a) shows the state before attaching to an internal combustion engine, and (b) shows the state attached to an internal combustion engine.

The matters shown here are for exemplifying and exemplifying embodiments of the present invention, and are considered to be the most effective and effortless explanations for understanding the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this regard, it is not intended to show structural details of the invention beyond a certain degree necessary for a fundamental understanding of the invention, and some embodiments of the invention are provided by description in conjunction with the drawings. It is intended to clarify to those skilled in the art how it is actually realized.

<Gasket>
As shown in FIGS. 1 and 2, for example, the gasket according to the present embodiment is provided in an annular groove (4) formed on the bottom surface side of the housing (2) of the oil filter (1), and is provided in the housing (2). ) And the mounting portion (8) of the internal combustion engine to which the housing is mounted. An annular gasket (5) is provided on the outer peripheral surface (5a) of the annular groove (4). A contact portion (31) that abuts on the outer peripheral wall surface (4a) is provided so as to project, and the contact portion (31) abuts on the outer peripheral wall surface (4a) of the annular groove (4), whereby the gasket (5) A storage gap (35) for accommodating the grease (26) applied to the surface (5b) of the gasket is formed between the outer peripheral surface (5a) of the gasket and the outer peripheral wall surface (4a) of the annular groove (4).

As the gasket according to the present embodiment, for example, as shown in FIGS. 3 to 5, a plurality of the contact portions (31) are provided along the circumferential direction of the gasket (5). .. In this case, it is preferable that each of the plurality of contact portions (31) is formed in an elongated shape in the axial direction of the gasket (5).

In the case of the above-described form, the width (w) of the gasket (5) of each of the contact portions (31) in the circumferential direction is, for example, 1 to 10 mm (preferably 1 to 3 mm) (for example, FIG. See 3rd magnitude). Further, as the circumferential distance (r) of the pair of abutting portions (31) adjacent to each other in the circumferential direction, for example, 1 to 10 mm (preferably 2 to 5 mm) can be mentioned.

As the gasket according to the present embodiment, for example, as shown in FIG. 1, the oil filter (1) includes a casing (2) and a filter element (3) arranged in the housing, and includes a housing (1). 2) is a cylindrical casing (11) having an open bottom, an end plate (12) having an oil inlet (6) and an outlet (7) while closing the bottom opening of the casing, and an end. The closure plate (13) has a closure plate (13) provided with a winding portion (13a) that is joined to the bottom surface of the plate and is wound around the peripheral edge of the open end of the casing (11). A bent extending portion (13b) extending inward in the radial direction of the casing (11) from the winding portion (13a) is provided, and the annular groove (4) is the winding portion (13a) and the extending portion (13b). The form formed by is mentioned.

The configuration, shape, size, etc. of the oil filter (1) are not particularly limited. This oil filter (1) filters lubricating and / or cooling oils normally used in internal combustion engines. Further, the material, shape, size, etc. of the gasket (5) are not particularly limited.

The shape, size, arrangement form, etc. of the contact portion (31) are not particularly limited. The axial height (h) of the gasket (5) of the contact portion (31) is, for example, 1 to 5 mm (preferably 2 to 4 mm) (see, for example, FIG. 2). The ratio (h / f) of the height (h) of the contact portion (31) to the depth (f) of the annular groove (4) is 0.5 to 1.0 (preferably 0.7 to 0.7). 0.9) can be mentioned. Further, as the radial protrusion amount (t) of the gasket (5) of the contact portion (31), for example, 0.1 to 1.0 mm (preferably 0.1 to 0.3 mm) can be mentioned (for example). , See Fig. 3 etc.). Further, the shape, size, arrangement form, etc. of the accommodation gap (35) are not particularly limited. Examples of the radial distance (q) of the gasket (5) of the accommodation gap (35) include 0.05 to 0.5 mm (preferably 0.05 to 0.15 mm) (for example, FIG. 2). Etc.).

<Oil filter>
The oil filter according to the present embodiment includes, for example, a housing (2) and a filter element (3) arranged in the housing, as shown in FIGS. 1 and 2, and is provided on the bottom surface side of the housing (2). In the annular groove (4) formed in, an annular gasket (5) that seals between the bottom surface side of the housing (2) and the mounting portion (8) of the internal combustion engine to which the housing (2) is mounted. In the oil filter (1) provided with the above, the gasket (5) has a contact portion (31) protruding from the outer peripheral surface (5a) of the gasket (5) in contact with the outer peripheral wall surface (4a) of the annular groove (4). When the contact portion (31) abuts on the outer peripheral wall surface (4a) of the annular groove (4), the outer peripheral surface (5a) of the gasket (5) and the outer peripheral wall surface (4) of the annular groove (4) are provided. A storage gap (35) for accommodating the grease (26) applied to the surface (5b) of the gasket (5) is formed between the gasket (5) and the surface (5b).
In the oil filter according to the present embodiment, for example, the configuration described in the gasket according to the above-described embodiment can be applied.

<Oil filter mounting structure>
The mounting structure of the oil filter according to the present embodiment is, for example, as shown in FIGS. 1 and 2, the mounting structure of the oil filter (1) according to the above-described embodiment with respect to the mounting portion (8) of the internal combustion engine. , The contact portion (31) of the gasket (5) is in contact with the outer peripheral wall surface (4a) of the annular groove (4), and the outer peripheral surface (5a) of the gasket (5) and the outer peripheral wall surface of the annular groove (4). A storage gap (35) is formed between the gasket (4a) and the storage gap (35), and the grease (26) applied to the surface (5b) of the gasket (5) is housed in the storage gap (35).

The reference numerals in parentheses of each configuration described in the above embodiment indicate the correspondence with the specific configurations described in the examples described later.

Hereinafter, the present invention will be specifically described with reference to the drawings.
In this embodiment, as the "oil filter" according to the present invention, a spin-on type oil filter in which the housing 2 is attached to the mounting portion 8 of the internal combustion engine and the entire including the housing 2 is replaced when the filter element 3 is replaced. No. 1 is illustrated (see FIG. 1).

A flat mounting surface (seat surface) 8a to which the oil filter 1 is mounted is formed on the mounting portion 8. The tip of the winding portion 13a of the closure plate 13, which will be described later, comes into contact with the mounting surface 8a (metal touch). Further, the mounting portion 8 is provided with a union bolt 9 that is screwed with the screw 17 of the end plate 12, which will be described later.

(1) Structure of Oil Filter The oil filter 1 according to the present embodiment includes a housing 2 and a filter element 3 arranged in the housing 2 as shown in FIG. An annular groove 4 is formed on the outer peripheral side of the bottom surface of the housing 2. The annular groove 4 is provided with a gasket 5 described later that seals between the bottom surface side of the housing 2 and the mounting portion 8 of the internal combustion engine to which the housing 2 is mounted.

The housing 2 has a cylindrical metal casing 11 having an open bottom, a metal end plate 12 having an oil inlet 6 and an outlet 7 while closing the bottom opening of the casing 11, and an end. It has a metal closure plate 13 that is joined to the plate 12 by welding, caulking, or the like, and has a winding portion 13a that is wound around the peripheral edge of the open end of the casing 11.

The internal space S of the casing 11 is divided into an upstream space Sa and a downstream space Sb by the filter element 3. On the ceiling portion in the casing 11, a relief valve 15 that communicates both spaces Sa and Sb when the pressure difference between the upstream space Sa and the downstream space Sb becomes a predetermined value or more when the filter element 3 is clogged or the like is provided. It is provided.

The end plate 12 is provided with a tubular protrusion 16 projecting upward on the center side thereof. A screw 17 to be screwed with the union bolt 9 is formed on the inner peripheral side of the protrusion 16. Further, the inside of the protrusion 16 constitutes an outlet 7. Further, a plurality of inlets 6 are formed along the circumferential direction on the outer peripheral side of the outlet 7 of the end plate 12. Further, a check valve 18 that regulates the flow of oil from the upstream space Sa to the inflow port is mounted on the outer peripheral side of the protrusion 16.

The closure plate 13 is formed in an annular shape so as to surround the inflow port 6 and the outflow port 7. The closure plate 13 includes a bent extending portion 13b extending inward in the radial direction of the casing 11 from the winding portion 13a. An annular groove 4 is formed by the winding portion 13a and the extending portion 13b. That is, the annular groove 4 is composed of recesses surrounded by the winding portion 13a and the extending portion 13b.

The filter element 3 includes a fold-folded tubular filter medium 21 and a protector 22 that supports the inner peripheral side of the filter medium 21 and has a plurality of flow holes 22a formed therein. A seal portion 23 is provided on each of the shaft end faces of the filter medium 21. The filter element 3 is supported in the casing 11 by pressing one of the sealing portions 23 against the support 15a constituting the relief valve 15 and pressing the other sealing portion 23 against the check valve 18.

The filter medium 21 is made of a non-woven fabric, a woven cloth, paper, or the like. Further, in this embodiment, the fold-folded tubular filter medium 21 has been illustrated, but the present invention is not limited to this, and for example, the filter medium formed by a foam or a molded body may be used.

(2) Gasket Structure The gasket 5 according to the present embodiment is formed in an annular shape by an elastic material such as rubber. As shown in FIG. 2A, the gasket 5 has a semi-cylindrical cross section formed in the shape of a semi-cylindrical shape along the axial direction thereof. The gasket 5 has an arcuate surface 5b (specifically, a sealing surface 5b) exposed on the opening side of the annular groove 4. By applying grease 26 on the surface 5b, the gasket 5 ensures appropriate lubricity when the oil filter 1 is attached to the attachment portion 8 of the internal combustion engine, and excessive deformation such as strain is suppressed. Ru.

As shown in FIGS. 3 to 5, the gasket 5 has a protrusion-like contact with the outer peripheral surface 5a (specifically, the outer peripheral surface 5a which is the generatrix of the cylinder) and the outer peripheral wall surface 4a of the annular groove 4. A plurality of portions 31 are provided. Each of these contact portions 31 is arranged at equal pitch and angular intervals along the circumferential direction of the gasket 5. Further, each contact portion 31 is formed in an elongated shape in the axial direction of the gasket 5. Specifically, the angular contact portion 31 is formed in a rectangular shape having a height h (see FIG. 2) in the axial direction larger than the width w in the circumferential direction of the gasket 5 when viewed from the front.

The height h of the gasket 5 of each of the contact portions 31 in the axial direction is constant and is about 4 mm (see FIG. 2). Further, the radial protrusion amount t of the gasket 5 of each contact portion 31 is constant and is about 0.2 mm (see FIG. 3). Further, the width (arc width) w of the gasket 5 of each contact portion 31 in the circumferential direction is constant, and is about 2 mm. Further, the circumferential distance (arc spacing) r of the pair of abutting portions 31 adjacent to each other in the circumferential direction is constant, and is about 4 mm.

The gasket 5 has a tongue piece 32 formed on the inner peripheral surface 5b of the gasket 5 over the entire circumference. When the tongue piece 32 enters the bent portion on the inner peripheral side of the annular groove 4, the gasket 5 is held (mounted) in the annular groove 4 (see FIG. 2).

(3) Action of Oil Filter Next, the action of the oil filter 1 having the above configuration will be described. The oil filter 1 (specifically, the housing 2) is attached to the mounting portion 8 by screwing the screw 17 of the end plate 12 into the union bolt 9 of the internal combustion engine. At this time, as shown in FIG. 2B, the gasket 5 is compressed and deformed in the axial direction, and the contact portion 31 comes into contact with the outer peripheral wall surface 4a of the annular groove 4. Due to this contact, the contact portion 31 acts as a spacer, and a housing gap 35 is formed between the outer peripheral surface 5a of the gasket 5 and the outer peripheral wall surface 4a of the annular groove 4. The grease 26 applied to the surface 5b of the gasket 5 is accommodated in the accommodating gap 35.

A plurality of the accommodation gaps 35 are formed along the circumferential direction of the gasket 5. The radial spacing q of the gasket 5 of the accommodating gap 35 is set to about 0.1 mm (see FIG. 2).

According to the oil filter 1, when the internal combustion engine is in operation, the oil pushes up the check valve 18 from the inflow port 6 and flows into the upstream space Sa as shown by the virtual line arrow in FIG. The inflow oil passes through the filter medium 21 and is filtered for foreign substances such as dust, then reaches the downstream space Sb through the flow hole 22a of the protector 22, and is returned to the lubrication path of the internal combustion engine through the outflow port 7. .. On the other hand, when the internal combustion engine is stopped, the check valve 18 regulates the oil in the casing 11 from flowing to the internal combustion engine side through the inflow port 6.

(3) Effect of Example According to the gasket 5 and the oil filter 1 of this embodiment, a contact portion 31 that abuts on the outer peripheral wall surface 4a of the annular groove 4 is provided on the outer peripheral surface 5a of the gasket 5 so as to project. The contact portion 31 abuts on the outer peripheral wall surface 4a of the annular groove 4, so that the grease 26 applied to the surface 5b of the gasket 5 is accommodated between the outer peripheral surface 5a of the gasket 5 and the outer peripheral wall surface 4a of the annular groove 4. A storage gap 35 is formed. As a result, when the oil filter 1 is attached to the mounting portion 8 of the internal combustion engine, the grease 26 applied to the surface 5b of the gasket 5 is accommodated in the accommodating gap 35, so that the grease 26 leaks to the outside of the housing 2. It is suppressed that it sticks out. Further, even if the grease 26 is liquefied after the temperature of the internal combustion engine rises, the liquefied grease 26 is retained in the accommodation gap 35 due to the capillary phenomenon of the minute accommodation gap 35.

Further, in this embodiment, a plurality of contact portions 31 are provided along the circumferential direction of the gasket 5. As a result, a plurality of minute accommodating gaps 35 are formed along the circumferential direction of the gasket 5. Therefore, the liquefied grease 26 is effectively retained by the capillary phenomenon of each of the minute accommodation spaces 35.

Further, in this embodiment, each of the plurality of contact portions 31 is formed in an elongated shape in the axial direction of the gasket 5. As a result, the axial length of the gasket 5 of each of the minute accommodation spaces 35 becomes long. Therefore, the liquefied grease 26 is more effectively retained by the capillary phenomenon of each of the minute accommodation spaces 35. Further, the contact of the contact portion 31 prevents the gasket 5 from falling to the outside.

Further, in this embodiment, the oil filter 1 includes a housing 2 and a filter element 3, and the housing 2 has a casing 11, an end plate 12, and a closure plate 13, and the closure plate 13 has a casing plate 13. A bent extending portion 13b extending inward in the radial direction of the casing 11 from the winding portion 13a is provided, and the annular groove 4 is formed by the winding portion 13a and the extending portion 13b. As a result, the contact portion 31 comes into contact with the inner peripheral surface of the winding portion 13a (that is, the inner wall of the winding portion 13b), so that the contact portion 31 is between the outer peripheral surface 5a of the gasket 5 and the inner peripheral surface of the winding portion 13a. A storage gap 35 is formed in the space.

It should be noted that the present invention is not limited to the above-mentioned examples, and various modifications can be made within the scope of the present invention according to the purpose and application. That is, in the above embodiment, a mode in which a plurality of contact portions 31 are provided on the outer peripheral surface 5a of the gasket 5 at equal pitch angle intervals along the circumferential direction is illustrated, but the present invention is not limited to this, and for example, FIG. As shown in FIG. 7, an annular contact portion 31 may be provided over the entire circumference of the outer peripheral surface 5a of the gasket 5.

Further, for example, as shown in FIG. 8, a plurality of first contact portions 31a are provided on the outer peripheral surface 5a of the gasket 5 along the circumferential direction, and an annular second contact portion 31b is provided over the entire circumference. It may be provided as a form. The first contact portion 31a and the second contact portion 31b are connected, for example, in the axial direction of the gasket 5.

Further, for example, a plurality of contact portions 31 may be provided on the outer peripheral surface 5a of the gasket 5 at unequal pitch angle intervals along the circumferential direction.

Further, in the above embodiment, the contact portion 31 formed in the axial direction of the gasket 5 is illustrated, but the present invention is not limited to this, and for example, the gasket 5 is formed in the circumferential direction. It may be the contact portion 31.

Further, in the above embodiment, the gasket 5 having a cross section formed in a semi-cylindrical shape along the axial direction is illustrated, but the gasket 5 is not limited to this, and is, for example, a square ring, an O-ring, a D-ring, an X-ring, or the like. May be.

Further, in the above embodiment, the spin-on type oil filter 1 has been illustrated, but the present invention is not limited to this, and for example, the oil filter 1 may be reused without replacing the housing 2 or the like when the filter element 3 is replaced. Good.

Further, in the above embodiment, the mounting posture of the oil filter 1 with respect to the internal combustion engine is appropriately selected. Examples of the mounting posture include a form in which the bottom opening of the casing 11 is directed downward, upward, diagonally, or sideways.

The above examples are for illustration purposes only and are not to be construed as limiting the invention. Although the present invention has been described with reference to typical embodiments, the language used in the description and illustration of the invention is understood to be descriptive and exemplary rather than restrictive. As described in detail here, modifications can be made within the scope of the appended claims without departing from the scope or spirit of the invention in that form. Although specific structures, materials and examples have been referred to herein in detail of the invention, it is not intended to limit the invention to the disclosures herein, but rather the invention is claimed in the accompanying claims. It shall cover all functionally equivalent structures, methods and uses within the scope.

The present invention is not limited to the embodiments detailed above, and various modifications or modifications can be made within the scope of the claims of the present invention.

INDUSTRIAL APPLICABILITY The present invention is suitably used as a technique relating to an oil filter for filtering engine oil used in vehicles such as passenger cars, railroad vehicles, industrial vehicles, and aircraft.

1; oil filter, 2; housing, 3; filter element, 4; annular groove, 4a; outer wall surface, 5; gasket, 5a; outer surface, 5b; surface, 8; mounting part, 11; casing, 12; end plate , 13; Closure plate, 13a; Tightening part, 13b; Extension part, 26; Grease, 31; Contact part, 35; Containment space.

Claims (5)

An annular gasket provided in an annular groove formed on the bottom surface side of the oil filter housing and sealing between the bottom surface side of the housing and the mounting portion of the internal combustion engine to which the housing is mounted.
A contact portion that comes into contact with the outer peripheral wall surface of the annular groove is provided on the outer peripheral surface so as to project.
When the contact portion abuts on the outer peripheral wall surface of the annular groove, a storage gap for accommodating the grease applied to the surface of the gasket is formed between the outer peripheral surface of the gasket and the outer peripheral wall surface of the annular groove. A gasket characterized by being. The gasket according to claim 1, wherein a plurality of the contact portions are provided along the circumferential direction of the gasket. The gasket according to claim 2, wherein each of the plurality of abutting portions is formed in an elongated shape in the axial direction of the gasket. The oil filter comprises the housing and a filter element disposed within the housing.
The housing is joined to a cylindrical casing having an open bottom, an end plate having an oil inlet and an outlet while closing the bottom opening of the casing, and the bottom surface of the end plate. It has a closure plate with a wrapping portion that is wrapped around the open end of the casing.
The closure plate comprises a bent extending portion extending inward in the radial direction of the casing from the winding portion.
The gasket according to any one of claims 1 to 3, wherein the annular groove is formed by the winding portion and the extending portion. A housing, a filter element arranged in the housing, and an annular groove formed on the bottom surface side of the housing include a bottom surface side of the housing and a mounting portion of an internal combustion engine to which the housing is mounted. An oil filter equipped with an annular gasket that seals between them.
The gasket is provided with a contact portion that abuts on the outer peripheral wall surface of the annular groove so as to project from the outer peripheral surface thereof.
When the contact portion abuts on the outer peripheral wall surface of the annular groove, a storage gap for accommodating the grease applied to the surface of the gasket is formed between the outer peripheral surface of the gasket and the outer peripheral wall surface of the annular groove. An oil filter characterized by being

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