WO2019093012A1 - ガスケット - Google Patents
ガスケット Download PDFInfo
- Publication number
- WO2019093012A1 WO2019093012A1 PCT/JP2018/036508 JP2018036508W WO2019093012A1 WO 2019093012 A1 WO2019093012 A1 WO 2019093012A1 JP 2018036508 W JP2018036508 W JP 2018036508W WO 2019093012 A1 WO2019093012 A1 WO 2019093012A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- gasket
- peripheral surface
- flexible
- inner peripheral
- insertion member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/021—Sealings between relatively-stationary surfaces with elastic packing
- F16J15/022—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material
- F16J15/024—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material the packing being locally weakened in order to increase elasticity
- F16J15/025—Sealings between relatively-stationary surfaces with elastic packing characterised by structure or material the packing being locally weakened in order to increase elasticity and with at least one flexible lip
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/104—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing characterised by structure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/062—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces characterised by the geometry of the seat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/02—Sealings between relatively-stationary surfaces
- F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
- F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
- F16J15/12—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering
- F16J15/121—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement
- F16J15/125—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing with metal reinforcement or covering with metal reinforcement generally perpendicular to the surfaces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3268—Mounting of sealing rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/85—Mounting of fuel injection apparatus
- F02M2200/858—Mounting of fuel injection apparatus sealing arrangements between injector and engine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
- F02M55/004—Joints; Sealings
Definitions
- the present invention relates to a gasket for sealing an annular gap between a housing having an insertion hole and an insertion member inserted into the insertion hole.
- a gasket for sealing an annular gap between a housing having an insertion hole and an insertion member inserted into the insertion hole generally, one or more surfaces on the housing side and one or more surfaces on the insertion member side It is configured to be in close contact with three or more surfaces in total (see Patent Documents 1 and 2).
- the gasket thus configured, stable sealing performance is maintained if the position of the insertion member with respect to the insertion hole of the housing is proper.
- An object of the present invention is to provide a gasket which exhibits a stable sealing performance even when the insertion member is inclined with respect to the insertion hole.
- the present invention adopts the following means in order to solve the above problems.
- the gasket of the present invention is An annular member between a housing having an insertion hole, and an insertion member inserted into the insertion hole and an insertion member having an extension surface extending outward from the outer peripheral surface of the insertion member at a position not inserted into the insertion hole
- a gasket for sealing the gap A body portion fixed in a state of being in close contact with the inner peripheral surface of the insertion hole in a state of being separated from the insertion member;
- a flexible portion which is provided so as to extend from the body portion toward the inner peripheral surface side of the body portion, and which is flexible and deformable; Together with The flexible portion is in a bent state by being pushed into the expansion surface portion of the insertion member, and is in close contact with the expansion surface portion in a state of being separated from the housing and the insertion portion.
- the body portion adheres closely to the inner peripheral surface of the insertion hole of the housing, and the flexible portion adheres closely to the extension surface portion of the insertion member, thereby sealing the annular gap between the housing and the insertion member It is stopped.
- a flexible part is closely_contact
- the flexible portion is provided so as to extend from a position remote from the end surface of the body portion on the side opposite to the side of the expansion surface portion, whereby the body portion and the flexible portion An annular groove may be formed between the two.
- the flexible portion can be elongated without lengthening the entire length of the gasket. And by lengthening the flexible part, it is possible to increase the amount capable of bending deformation.
- the body portion is constituted by a cylindrical portion having cylindrical surface portions on the inner peripheral surface side and the outer peripheral surface side, and
- the flexible portion is A reduced diameter portion that extends from the body portion toward the inner peripheral surface side of the body portion, and the inner peripheral surface side and the outer peripheral surface side both decrease in diameter toward the extended surface portion;
- a cylindrical portion extending from the reduced diameter portion toward the extension surface portion; Equipped with The outer diameter of the cylindrical portion may be smaller than the inner diameter of the smallest diameter of the inner peripheral surface of the body portion.
- the cylindrical portion can be easily bent.
- the flexible portion may be provided closer to the extension surface than the cylindrical portion, and may include a tip that determines the bending direction of the flexible portion when the flexible portion is pushed into the extension surface.
- the bending direction of the flexible portion is determined by the tip portion, it is possible to suppress variation in the method of deformation of the flexible portion or variation in the position in close contact with the extension surface portion. .
- the distal end portion has a portion that bulges outward in the radial direction, and the largest thickness portion is configured to be thicker than the thickness of the cylindrical portion, and the end portion on the expansion surface portion side faces the expansion surface portion It is preferable to have an inclined surface that expands in diameter.
- the distal end portion when the distal end portion is pushed into the extension surface portion, the distal end portion is deformed so that the distal end is inclined radially outward, so that the flexible portion is recessed so that the cylindrical portion is radially inward. It can be deformed. Further, it is more preferable that the largest thickness portion at the tip end portion be thicker than the thickness of the diameter reducing portion.
- the distal end portion has a portion that bulges radially inward, so that the largest thickness portion is thicker than the thickness of the cylindrical portion, and the expanded surface portion is formed at the end portion on the expanded surface portion side. It is also preferable to have an inclined surface that reduces in diameter toward
- the tip end portion when the tip end portion is pushed into the extension surface portion, the tip end portion is deformed so that the tip end inclines inward in the radial direction so that the cylindrical portion bulges outward in the radial direction. It can be deformed. Further, it is more preferable that the largest thickness portion at the tip end portion be thicker than the thickness of the diameter reducing portion.
- FIG. 1 is a schematic cross-sectional view of a gasket according to a first embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view of the sealing structure according to the first embodiment of the present invention.
- FIG. 3 is a schematic cross-sectional view of a gasket according to a second embodiment of the present invention.
- FIG. 4 is a schematic cross-sectional view of a sealing structure according to a second embodiment of the present invention.
- FIG. 5 is a schematic cross-sectional view of a gasket according to a third embodiment of the present invention.
- FIG. 6 is a schematic cross-sectional view of a sealing structure according to a third embodiment of the present invention.
- the gasket according to the present embodiment serves to seal an annular gap between a housing having an insertion hole and an insertion member inserted into the insertion hole.
- a housing having an insertion hole and an insertion member inserted into the insertion hole.
- a head cover and an inverter case can be mentioned, for example.
- an injection pipe and a plug tube can be mentioned as a specific example of an insertion member.
- FIG. 1 is a schematic cross-sectional view of a gasket according to a first embodiment of the present invention.
- the gasket which concerns on a present Example is rotationally symmetrical shape
- FIG. 1 the cross-sectional view which cut
- FIG. 1 dotted lines indicate the inner peripheral surface of the housing and the outer peripheral surface of the insertion member so that the positional relationship and the dimensional relationship between the gasket and the housing and the insertion member can be easily understood.
- FIG. 2 is a schematic cross-sectional view of the sealing structure according to the first embodiment of the present invention. Also in FIG. 2, a cross-sectional view in which the gasket or the like is cut along a plane including the central axis of the gasket is shown.
- Housing 800 has an insertion hole 810. Of the inner peripheral surface of the insertion hole 810, at least a portion to which the gasket 100 is in close contact is constituted by a cylindrical surface. Although a step is provided on the inner peripheral surface of the insertion hole 810 in the illustrated example, the step is not necessarily required.
- the insertion member 900 has an insertion portion 910 which is inserted into the insertion hole 810 and an extension surface portion 920 which expands outward from the outer peripheral surface of the insertion portion 910 at a position where it is not inserted into the insertion hole 810.
- the cylindrical portion corresponds to the insertion portion 910
- the end face of the outward flange portion on the insertion portion 910 side corresponds to the expansion surface portion 920.
- the shape of the insertion member 900 to which the gasket 100 according to the present embodiment is applied is not limited to such a shape.
- the outer peripheral surface 910a of the insertion portion 910 is a cylindrical surface, but the shape of the outer peripheral surface 910a is not particularly limited.
- the extended surface portion 920 does not have to be the end surface of the outward flange portion.
- the extension surface portion 920 may be formed by an inclined surface (for example, a tapered surface) which decreases in diameter toward the insertion portion 910, or an inclined surface (for example, a tapered surface) in which the diameter increases toward the insertion portion 910. It may be composed of
- the gasket 100 is configured of a reinforcing ring 110 and a gasket body 120 made of a rubber-like elastic body provided integrally with the reinforcing ring 110.
- the gasket 100 can be obtained by molding the gasket body 120 by insert molding using the reinforcing ring 110 as an insert part.
- the gasket body 120 includes a body portion 121 and a flexible portion 122 which is provided so as to extend from the body portion 121 toward the inner peripheral surface side of the body portion 121 and which can be bent and deformed.
- the body portion 121 is configured to be fixed in a state of being in close contact with the inner peripheral surface of the insertion hole 810 in a state of being separated from the insertion member 900 (see FIG. 2).
- the body portion 121 is formed of a cylindrical portion having cylindrical surface portions on the inner peripheral surface side and the outer peripheral surface side. Further, on the outer peripheral surface side of the body portion 121, annular seal protrusions 121a and 121b are provided.
- the flexible portion 122 is in a bent state by being pushed into the expansion surface portion 920 of the insertion member 900, and is in close contact with the expansion surface portion 920 in a state in which the housing 800 and the insertion portion 910 are spaced apart.
- Configured The flexible portion 122 extends from the body portion 121 toward the inner peripheral surface side of the body portion 121, and the inner peripheral surface side and the outer peripheral surface side both decrease in diameter toward the expansion surface portion 920.
- a cylindrical portion 122 b extending from the reduced diameter portion 122 a toward the expansion surface portion 920.
- the outer diameter D11 of the cylindrical portion 122b is designed to be smaller than the smallest inner diameter D12 of the inner peripheral surface of the body portion 121.
- a tip end portion 122c is provided closer to the expansion surface portion 920 than the cylindrical portion 122b.
- the tip portion 122 c is designed to determine the bending direction of the flexible portion 122 when pushed into the extension surface portion 920. More specifically, in the distal end portion 122c according to the present embodiment, the maximum thickness portion t11 is configured to be thicker than the thickness t12 of the cylindrical portion 122b by having a portion that bulges outward in the radial direction. . Further, the largest thickness portion t11 is configured to be thicker than the thickness t13 of the reduced diameter portion 122a. That is, t11> t12 ⁇ t13 or t11> t13 ⁇ t12 is satisfied.
- an inclined surface 122c1 whose diameter is increased toward the extended surface portion 920 is provided at an end portion of the distal end portion 122c on the expanded surface portion 920 side.
- the inclined surface 122c1 according to the present embodiment is formed of a tapered surface, but the inclined surface may be an inclined surface which is a curve when viewed in cross section.
- the tip end portion 122c has a portion that bulges radially outward, and the end portion on the extension surface portion 920 side is provided with an inclined surface 122c1 that expands in diameter toward the extension surface portion 920. Therefore, when the distal end portion 122c is pushed into the extension surface portion 920, the distal end portion 122c is deformed so that the distal end thereof is inclined radially outward, so that the cylindrical portion 122b may be concaved radially inward.
- the flexure 122 is deformed (see FIG. 2).
- the flexible portion 122 in a bent state is in a state of being in close contact with the extension surface portion 920 with the housing 800 and the insertion portion 910 being spaced from each other.
- the body portion 121 is in close contact with the inner peripheral surface of the insertion hole 810 of the housing 800, and the flexible portion 122 is in close contact with the expansion surface portion 920 of the insertion member 900.
- the annular gap between the insertion member 900 is sealed.
- the flexible portion 122 is in close contact with the extension surface portion 920 in a bent state, and the housing 800 and the insertion portion 910 are kept spaced from each other. Therefore, even when the insertion member 900 is inclined with respect to the insertion hole 810, the flexible part 122 itself is not restricted to the insertion hole 810 without being restrained from the housing 800 and the insertion part 910.
- the cylindrical portion 122b can be easily bent. Thereby, in the process of bending the flexible portion 122, it is possible to suppress that the close contact position of the distal end portion 122c with respect to the extension surface portion 920 moves significantly. Therefore, it is possible to suppress the variation in the close contact position of the distal end portion 122c with respect to the extended surface portion 920, and also to suppress the distal end portion 122c from being widely spread radially outward.
- the bending direction of the flexible portion 122 is determined by the tip portion 122c, so that the method of deformation of the flexible portion 122 varies or the position where the flexible portion 122 adheres to the extension surface 920 Can be suppressed. Furthermore, the largest thick part t11 of the tip 122c is thicker than the thickness t12 of the cylindrical part 122b and has high rigidity, so that the tip 122c is more reliably prevented from spreading widely in the radial direction outside. be able to.
- the tip 122c can be more widely spread radially outward. It can be suppressed.
- FIG. 3 is a schematic cross-sectional view of a gasket according to a second embodiment of the present invention.
- the gasket which concerns on a present Example is rotationally symmetrical shape
- FIG. 3 the sectional view which cut
- dotted lines indicate the inner peripheral surface of the housing and the outer peripheral surface of the insertion member so that the positional relationship and the dimensional relationship between the gasket and the housing and the insertion member can be easily understood.
- FIG. 3 is a schematic cross-sectional view of a gasket according to a second embodiment of the present invention.
- the gasket which concerns on a present Example is rotationally symmetrical shape
- FIG. 3 the sectional view which cut
- dotted lines indicate the inner peripheral surface of the housing and the outer peripheral surface of the insertion member so that the positional relationship and the dimensional relationship between the gasket and
- FIG. 4 is a schematic cross-sectional view of a sealing structure according to a second embodiment of the present invention. Also in FIG. 4, a cross-sectional view in which the gasket or the like is cut along a plane including the central axis of the gasket is shown.
- the housing 800 and the insertion member 900 are as described in the first embodiment, and thus the description thereof is omitted.
- the gasket 200 which concerns on a present Example is demonstrated.
- the gasket 200 is composed of a reinforcing ring 210 and a gasket body 220 made of a rubber-like elastic body provided integrally with the reinforcing ring 210.
- the gasket 200 is obtained by molding the gasket body 220 by insert molding, with the reinforcing ring 210 as an insert part.
- the gasket main body 220 includes a body portion 221 and a flexible portion 222 which is provided so as to extend from the body portion 221 toward the inner peripheral surface side of the body portion 221 and which can be bent and deformed.
- the body portion 221 is configured to be fixed in a state of being in close contact with the inner peripheral surface of the insertion hole 810 in a state of being separated from the insertion member 900 (see FIG. 4).
- the body portion 221 is formed of a cylindrical portion having cylindrical surface portions on the inner peripheral surface side and the outer peripheral surface side. Further, on the outer peripheral surface side of the body portion 221, annular seal protrusions 221a and 221b are provided.
- the flexible portion 222 is in a bent state by being pushed into the expansion surface portion 920 of the insertion member 900, and is in close contact with the expansion surface portion 920 in a state in which the housing 800 and the insertion portion 910 are spaced apart.
- Configured The flexible portion 222 extends from the body portion 221 toward the inner peripheral surface side of the body portion 221, and the inner peripheral surface side and the outer peripheral surface side both decrease in diameter toward the expansion surface portion 920.
- a cylindrical portion 222 b extending from the reduced diameter portion 222 a toward the expansion surface portion 920.
- the outer diameter D21 of the cylindrical portion 222b is designed to be smaller than the smallest inner diameter D22 of the inner peripheral surface of the body portion 221.
- a distal end portion 222c is provided closer to the expansion surface portion 920 than the cylindrical portion 222b.
- the tip portion 222 c is designed to determine the bending direction of the flexible portion 222 when pushed into the extension surface portion 920. More specifically, in the distal end portion 222c according to the present embodiment, the maximum thickness portion t21 is configured to be thicker than the thickness t22 of the cylindrical portion 222b by having a portion that bulges outward in the radial direction. . Further, the largest thickness portion t21 is configured to be thicker than the thickness t23 of the reduced diameter portion 222a.
- an inclined surface 222c1 whose diameter is increased toward the extended surface portion 920 is provided at an end of the distal end portion 222c on the expanded surface portion 920 side.
- the inclined surface 222c1 according to the present embodiment is formed of a tapered surface, but the inclined surface can also be an inclined surface that forms a curve when viewed in cross section.
- the flexible portion 222 is provided so as to extend from a position away from the end surface on the extension surface portion 920 side of the body portion 221 opposite to the extension surface portion 920 side. ing. Thus, an annular groove portion 230 is formed between the body portion 221 and the flexible portion 222.
- the flexible portion 222 extends from a position away from the end surface on the extension surface portion 920 side of the body portion 221 opposite to the extension surface portion 920 side. It is provided as. As a result, the flexible portion 222 can be lengthened without lengthening the entire length of the gasket 200. Therefore, by lengthening the flexible portion 222, it is possible to increase the amount capable of bending deformation. In addition, as compared with the case of the first embodiment, the distal end portion 222c can be made difficult to expand radially outward.
- FIG. 5 is a schematic cross-sectional view of a gasket according to a third embodiment of the present invention.
- the gasket which concerns on a present Example is rotationally symmetrical shape
- FIG. 5 the cross-sectional view which cut
- dotted lines indicate the inner peripheral surface of the housing and the outer peripheral surface of the insertion member so that the positional relationship and the dimensional relationship between the gasket and the housing and the insertion member can be easily understood.
- FIG. 6 is a schematic cross-sectional view of a sealing structure according to a third embodiment of the present invention.
- FIG. 6 also shows a cross-sectional view of the gasket or the like cut along a plane including the central axis of the gasket.
- the housing 800 and the insertion member 900 are as described in the first embodiment, and thus the description thereof is omitted.
- the gasket 300 which concerns on a present Example is demonstrated.
- the gasket 300 includes a reinforcing ring 310 and a gasket body 320 made of a rubber-like elastic body integrally provided to the reinforcing ring 310.
- the gasket 300 can be obtained by molding the gasket body 320 by insert molding using the reinforcing ring 310 as an insert part.
- the gasket body 320 includes a body portion 321 and a flexible portion 322 which is provided so as to extend from the body portion 321 toward the inner peripheral surface side of the body portion 321 and which can be bent and deformed.
- the body portion 321 is configured to be fixed in a state of being in close contact with the inner peripheral surface of the insertion hole 810 in a state of being separated from the insertion member 900 (see FIG. 6).
- the body portion 321 is formed of a cylindrical portion having cylindrical surface portions on the inner peripheral surface side and the outer peripheral surface side. Further, on the outer peripheral surface side of the body portion 321, annular seal protrusions 321a and 321b are provided.
- the flexible portion 322 is in a bent state by being pushed into the expansion surface portion 920 of the insertion member 900, and is in close contact with the expansion surface portion 920 with the housing 800 and the insertion portion 910 spaced apart from each other.
- Configured The flexible portion 322 extends from the body portion 321 toward the inner peripheral surface side of the body portion 321, and the inner peripheral surface side and the outer peripheral surface side both decrease in diameter toward the extension surface portion 920.
- a cylindrical portion 322 b extending from the reduced diameter portion 322 a toward the expansion surface portion 920.
- the outer diameter D31 of the cylindrical portion 322b is designed to be smaller than the smallest inner diameter D32 of the inner peripheral surface of the body portion 321.
- a tip end portion 322c is provided closer to the expansion surface portion 920 than the cylindrical portion 322b.
- the tip portion 322 c is designed to determine the bending direction of the flexible portion 322 when pushed into the extension surface portion 920.
- the maximum thickness portion t31 is configured to be thicker than the thickness t32 of the cylindrical portion 322b by having a portion that bulges inward in the radial direction.
- the largest thickness portion t31 is configured to be thicker than the thickness t33 of the reduced diameter portion 322a. That is, t31> t32 ⁇ t33 or t31> t33 ⁇ t32 is satisfied.
- an inclined surface 322c1 whose diameter decreases toward the extension surface 920 is provided at an end of the tip end 322c on the expansion surface 920 side.
- the inclined surface 322c1 according to the present embodiment is formed of a tapered surface, but the inclined surface may be an inclined surface that forms a curve when viewed in cross section.
- the flexible portion 322 is provided so as to extend from a position away from the end surface on the extension surface portion 920 side of the body portion 321 opposite to the extension surface portion 920 side. ing. Thus, an annular groove portion 330 is formed between the body portion 321 and the flexible portion 322.
- ⁇ Sealed structure> A sealing structure using the gasket 300 according to the present embodiment will be described.
- the gasket 300 is attached to the insertion hole 810 before the insertion member 900 is inserted into the insertion hole 810 of the housing 800.
- the outer peripheral surface of the body portion 321 of the gasket 300 is in close contact with the inner peripheral surface of the insertion hole 810.
- the distal end portion 322c of the flexible portion 322 of the gasket 300 is pushed by the expansion surface portion 920 of the insertion member 900.
- the tip end portion 322 c has a portion that bulges radially inward, and an inclined surface 322 c 1 whose diameter decreases toward the extension surface portion 920 is provided at the end portion on the extension surface portion 920 side. Therefore, when the tip end portion 322c is pushed into the extension surface portion 920, the tip end portion 322c is deformed so that the tip end is inclined inward in the radial direction, so that the cylindrical portion 322b may expand outward in the radial direction.
- the flexure 322 is deformed (see FIG. 6).
- the flexible portion 322 in a bent state is in a state of being in close contact with the extension surface portion 920 with the housing 800 and the insertion portion 910 being spaced apart from each other.
- the flexible portion 322 can be lengthened without lengthening the entire length of the gasket 300. Therefore, by lengthening the flexible portion 322, it is possible to increase the amount capable of bending deformation. Further, in the case of the present embodiment, unlike the cases of the above-described Embodiments 1 and 2, the flexible portion 322 is deformed so that the cylindrical portion 322b bulges outward in the radial direction, and the tip portion 322c is in the radial direction It will be in the state which turned inward. Therefore, even when the radial dimension of the expansion surface portion 920 is short, the tip end portion 322 c does not protrude to the outside of the expansion surface portion 920.
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Abstract
Description
挿入穴を有するハウジングと、前記挿入穴に挿入される挿入部及び前記挿入穴には挿入されない位置で前記挿入部の外周面から外側に向かって拡がる拡張面部を有する挿入部材と、の間の環状隙間を封止するガスケットであって、
前記挿入部材とは間隔を空けた状態で前記挿入穴の内周面に密着された状態で固定される胴体部と、
前記胴体部から該胴体部の内周面側に向かって伸びるように設けられ、かつ撓み変形可能な可撓部と、
を備えると共に、
前記可撓部は、前記挿入部材の前記拡張面部に押し込まれることで撓んだ状態となり、かつ前記ハウジング及び前記挿入部とはそれぞれ間隔を空けた状態で前記拡張面部に密着することを特徴とする。
前記可撓部は、
前記胴体部から該胴体部の内周面側に向かって伸び、かつ内周面側と外周面側がいずれも前記拡張面部に向かって縮径する縮径部と、
前記縮径部から前記拡張面部に向かって伸びる円筒状部と、
を備え、
前記円筒状部の外径は、前記胴体部の内周面のうち最も小径の内径よりも小さいとよい。
図1及び図2を参照して、本発明の実施例1に係る密封装置について説明する。図1は本発明の実施例1に係るガスケットの模式的断面図である。なお、本実施例に係るガスケットは回転対称形状であり、図1においては、ガスケットの中心軸線を含む面でガスケットを切断した断面図を示している。また、図1においては、ガスケットとハウジング及び挿入部材との配置関係や寸法関係が分かり易いように、点線にて、ハウジングの内周面と挿入部材の外周面を示している。図2は本発明の実施例1に係る密封構造の模式的断面図である。図2においても、ガスケットの中心軸線を含む面で、ガスケット等を切断した断面図を示している。
ハウジング800及び挿入部材900について説明する。ハウジング800は、挿入穴810を有している。この挿入穴810の内周面のうち少なくともガスケット100が密着する部位は円柱面により構成されている。なお、図示の例では、挿入穴810の内周面に段差が設けられているが、段差は必ずしも必要ではない。挿入部材900は、挿入穴810に挿入される挿入部910と、挿入穴810には挿入されない位置で挿入部910の外周面から外側に向かって拡がる拡張面部920とを有している。挿入部材900の具体的な形状の一例として、円柱状部分と、円柱状部分に設けられる外向きフランジ部とを有する形状を挙げることができる。この場合、円柱状部分が挿入部910に相当し、外向きフランジ部における挿入部910側の端面が拡張面部920に相当する。しかしながら、本実施例に係るガスケット100が適用される挿入部材900の形状は、そのような形状には限定されない。また、図示の例では、挿入部910の外周面910aは円柱面の場合を示しているが、外周面910aの形状は特に限定されることはない。また、拡張面部920についても、外向きフランジ部の端面である必要はない。更に、図示の例では、拡張面部920が、ガスケット100の中心軸線に対して垂直な平面で構成される場合を示しているが、ガスケット100が適用される拡張面部920は必ずしも平面でなくてもよい。例えば、拡張面部920は挿入部910側に向かって縮径する傾斜面(例えば、テーパ面)で構成されていてもよいし、挿入部910側に向かって拡径する傾斜面(例えば、テーパ面)で構成されていてもよい。
ガスケット100について、より詳細に説明する。ガスケット100は、補強環110と、補強環110に対して一体的に設けられるゴム状弾性体製のガスケット本体120とから構成される。例えば、補強環110をインサート部品として、インサート成形によりガスケット本体120を成形することによりガスケット100が得られる。そして、ガスケット本体120は、胴体部121と、胴体部121から胴体部121の内周面側に向かって伸びるように設けられ、かつ撓み変形可能な可撓部122とから構成される。胴体部121は、挿入部材900とは間隔を空けた状態で挿入穴810の内周面に密着された状態で固定されるように構成されている(図2参照)。この胴体部121は、内周面側と外周面側にそれぞれ円柱面部を有する筒状部により構成される。また、胴体部121の外周面側には、環状のシール突起121a,121bが設けられている。
本実施例に係るガスケット100を用いた密封構造について説明する。ハウジング800の挿入穴810に挿入部材900が挿入される前の状態で、挿入穴810にガスケット100が装着される。これにより、挿入穴810の内周面にガスケット100の胴体部121の外周面が密着した状態となる。そして、挿入部材900が挿入穴810に挿入されると、挿入部材900の拡張面部920によって、ガスケット100の可撓部122における先端部122cが押し込まれる。先端部122cは、上記の通り、径方向外側に向かって膨らむ部位を有し、かつ拡張面部920側の端部に、拡張面部920に向かって拡径する傾斜面122c1が設けられている。そのため、先端部122cが拡張面部920に押し込まれる際に、先端部122cは、その先端が径方向外側に傾くように変形することで、円筒状部122bが径方向内側に向かって凹むように可撓部122は変形する(図2参照)。また、撓んだ状態の可撓部122は、ハウジング800及び挿入部910とはそれぞれ間隔を空けた状態で拡張面部920に密着した状態となる。
本実施例に係るガスケット100によれば、ハウジング800の挿入穴810の内周面に胴体部121が密着し、挿入部材900の拡張面部920に可撓部122が密着することで、ハウジング800と挿入部材900との間の環状隙間が封止される。そして、可撓部122は、撓んだ状態で拡張面部920に密着すると共に、ハウジング800と挿入部910とはそれぞれ間隔を空けた状態が保たれる。従って、挿入穴810に対して挿入部材900が傾いた状態となった場合でも、可撓部122は、ハウジング800及び挿入部910から拘束されることなく、可撓部122自体が挿入穴810に対する挿入部材900の傾き状態に応じて変形する。これにより、可撓部122の拡張面部920への密着状態を維持させることができる。従って、挿入穴810に対して挿入部材900が傾いた状態となった場合でも安定した密封性能が発揮される。
図3及び図4を参照して、本発明の実施例2に係る密封装置について説明する。図3は本発明の実施例2に係るガスケットの模式的断面図である。なお、本実施例に係るガスケットは回転対称形状であり、図3においては、ガスケットの中心軸線を含む面でガスケットを切断した断面図を示している。また、図3においては、ガスケットとハウジング及び挿入部材との配置関係や寸法関係が分かり易いように、点線にて、ハウジングの内周面と挿入部材の外周面を示している。図4は本発明の実施例2に係る密封構造の模式的断面図である。図4においても、ガスケットの中心軸線を含む面で、ガスケット等を切断した断面図を示している。
図5及び図6を参照して、本発明の実施例3に係る密封装置について説明する。図5は本発明の実施例3に係るガスケットの模式的断面図である。なお、本実施例に係るガスケットは回転対称形状であり、図5においては、ガスケットの中心軸線を含む面でガスケットを切断した断面図を示している。また、図5においては、ガスケットとハウジング及び挿入部材との配置関係や寸法関係が分かり易いように、点線にて、ハウジングの内周面と挿入部材の外周面を示している。図6は本発明の実施例3に係る密封構造の模式的断面図である。図6においても、ガスケットの中心軸線を含む面で、ガスケット等を切断した断面図を示している。
本実施例に係るガスケット300について説明する。ガスケット300は、補強環310と、補強環310に対して一体的に設けられるゴム状弾性体製のガスケット本体320とから構成される。例えば、補強環310をインサート部品として、インサート成形によりガスケット本体320を成形することによりガスケット300が得られる。そして、ガスケット本体320は、胴体部321と、胴体部321から胴体部321の内周面側に向かって伸びるように設けられ、かつ撓み変形可能な可撓部322とから構成される。胴体部321は、挿入部材900とは間隔を空けた状態で挿入穴810の内周面に密着された状態で固定されるように構成されている(図6参照)。この胴体部321は、内周面側と外周面側にそれぞれ円柱面部を有する筒状部により構成される。また、胴体部321の外周面側には、環状のシール突起321a,321bが設けられている。
本実施例に係るガスケット300を用いた密封構造について説明する。ハウジング800の挿入穴810に挿入部材900が挿入される前の状態で、挿入穴810にガスケット300が装着される。これにより、挿入穴810の内周面にガスケット300の胴体部321の外周面が密着した状態となる。そして、挿入部材900が挿入穴810に挿入されると、挿入部材900の拡張面部920によって、ガスケット300の可撓部322における先端部322cが押し込まれる。先端部322cは、上記の通り、径方向内側に向かって膨らむ部位を有し、かつ拡張面部920側の端部に、拡張面部920に向かって縮径する傾斜面322c1が設けられている。そのため、先端部322cが拡張面部920に押し込まれる際に、先端部322cは、その先端が径方向内側に傾くように変形することで、円筒状部322bが径方向外側に向かって膨らむように可撓部322は変形する(図6参照)。また、撓んだ状態の可撓部322は、ハウジング800及び挿入部910とはそれぞれ間隔を空けた状態で拡張面部920に密着した状態となる。
110,210,310 補強環
120,220,320 ガスケット本体
121,221,321 胴体部
121a,121b,221a,221b,321a,321b シール突起
122,222,322 可撓部
122a,222a,322a 縮径部
122b,222b,322b 円筒状部
122c,222c,322c 先端部
122c1,222c1,322c1 傾斜面
230,330 環状溝部
800 ハウジング
810 挿入穴
900 挿入部材
910 挿入部
910a 外周面
920 拡張面部
Claims (8)
- 挿入穴を有するハウジングと、前記挿入穴に挿入される挿入部及び前記挿入穴には挿入されない位置で前記挿入部の外周面から外側に向かって拡がる拡張面部を有する挿入部材と、の間の環状隙間を封止するガスケットであって、
前記挿入部材とは間隔を空けた状態で前記挿入穴の内周面に密着された状態で固定される胴体部と、
前記胴体部から該胴体部の内周面側に向かって伸びるように設けられ、かつ撓み変形可能な可撓部と、
を備えると共に、
前記可撓部は、前記挿入部材の前記拡張面部に押し込まれることで撓んだ状態となり、かつ前記ハウジング及び前記挿入部とはそれぞれ間隔を空けた状態で前記拡張面部に密着することを特徴とするガスケット。 - 前記可撓部は、前記胴体部における前記拡張面部側の端面に対して、前記拡張面部側とは反対側に離れた位置から伸びるように設けられることで、前記胴体部と前記可撓部との間には環状溝部が形成されていることを特徴とする請求項1に記載のガスケット。
- 前記胴体部は、内周面側と外周面側にそれぞれ円柱面部を有する筒状部により構成されると共に、
前記可撓部は、
前記胴体部から該胴体部の内周面側に向かって伸び、かつ内周面側と外周面側がいずれも前記拡張面部に向かって縮径する縮径部と、
前記縮径部から前記拡張面部に向かって伸びる円筒状部と、
を備え、
前記円筒状部の外径は、前記胴体部の内周面のうち最も小径の内径よりも小さいことを特徴とする請求項1または2に記載のガスケット。 - 前記可撓部には、前記円筒状部よりも前記拡張面部側に設けられると共に、該拡張面部に押し込まれる際に前記可撓部の撓み方向を決定付ける先端部が備えられることを特徴とする請求項3に記載のガスケット。
- 前記先端部は、径方向外側に向かって膨らむ部位を有することで最大肉厚部が前記円筒状部の肉厚よりも厚く構成されると共に、前記拡張面部側の端部に該拡張面部に向かって拡径する傾斜面を有することを特徴とする請求項4に記載のガスケット。
- 前記先端部における最大肉厚部は前記縮径部の肉厚よりも厚く構成されることを特徴とする請求項5に記載のガスケット。
- 前記先端部は、径方向内側に向かって膨らむ部位を有することで最大肉厚部が前記円筒状部の肉厚よりも厚く構成されると共に、前記拡張面部側の端部に該拡張面部に向かって縮径する傾斜面を有することを特徴とする請求項4に記載のガスケット。
- 前記先端部における最大肉厚部は前記縮径部の肉厚よりも厚く構成されることを特徴とする請求項7に記載のガスケット。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16/761,641 US11391373B2 (en) | 2017-11-10 | 2018-09-28 | Gasket |
| CN202210679497.9A CN114962641A (zh) | 2017-11-10 | 2018-09-28 | 垫圈 |
| EP18877164.6A EP3708882A4 (en) | 2017-11-10 | 2018-09-28 | GASKET |
| JP2019551908A JP6837572B2 (ja) | 2017-11-10 | 2018-09-28 | ガスケット |
| CN201880071638.0A CN111373177B (zh) | 2017-11-10 | 2018-09-28 | 垫圈 |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2017-217723 | 2017-11-10 | ||
| JP2017217723 | 2017-11-10 |
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| Publication Number | Publication Date |
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| WO2019093012A1 true WO2019093012A1 (ja) | 2019-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| PCT/JP2018/036508 Ceased WO2019093012A1 (ja) | 2017-11-10 | 2018-09-28 | ガスケット |
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| Country | Link |
|---|---|
| US (1) | US11391373B2 (ja) |
| EP (1) | EP3708882A4 (ja) |
| JP (1) | JP6837572B2 (ja) |
| CN (2) | CN114962641A (ja) |
| WO (1) | WO2019093012A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230175585A1 (en) * | 2020-05-01 | 2023-06-08 | Nok Corporation | Gasket and sealing structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020153056A1 (ja) * | 2019-01-23 | 2020-07-30 | Nok株式会社 | 密封装置及び密封構造 |
| US11692630B2 (en) * | 2020-04-21 | 2023-07-04 | Ford Global Technologies, Llc | Redundant seal with radial features |
| JP2025125235A (ja) * | 2024-02-15 | 2025-08-27 | Nok株式会社 | 密封装置および密封構造 |
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- 2018-09-28 CN CN201880071638.0A patent/CN111373177B/zh not_active Expired - Fee Related
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114962641A (zh) | 2022-08-30 |
| US20210172524A1 (en) | 2021-06-10 |
| CN111373177A (zh) | 2020-07-03 |
| EP3708882A4 (en) | 2021-08-04 |
| CN111373177B (zh) | 2022-08-19 |
| JP6837572B2 (ja) | 2021-03-03 |
| JPWO2019093012A1 (ja) | 2020-11-12 |
| US11391373B2 (en) | 2022-07-19 |
| EP3708882A1 (en) | 2020-09-16 |
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