WO2014119204A1 - 密封装置 - Google Patents
密封装置 Download PDFInfo
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- WO2014119204A1 WO2014119204A1 PCT/JP2013/084725 JP2013084725W WO2014119204A1 WO 2014119204 A1 WO2014119204 A1 WO 2014119204A1 JP 2013084725 W JP2013084725 W JP 2013084725W WO 2014119204 A1 WO2014119204 A1 WO 2014119204A1
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- WIPO (PCT)
- Prior art keywords
- sealing device
- support member
- elastic seal
- peripheral surface
- diameter portion
- Prior art date
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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
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/322—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip supported in a direction perpendicular to the surfaces
-
- 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
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3216—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip supported in a direction parallel to the surfaces
-
- 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
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3228—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip formed by deforming a flat ring
-
- 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
Definitions
- the present invention relates to a sealing device that seals an annular gap between a relatively rotating shaft and a housing.
- Patent Document 3 There is also known a method of fixing a support member or the like by fitting a metal adapter in a state where the support member and the elastic seal are mounted at the mounting location. Furthermore, a method of holding a support member with an elastic seal is also known (see Patent Document 4).
- An object of the present invention is to provide a sealing device that can fix an elastic seal in a state of being positioned with respect to a support member without using an adhesive or an adapter.
- the present invention employs the following means in order to solve the above problems.
- the sealing device of the present invention is In a sealing device for sealing an annular gap between a relatively rotating shaft and a housing, An elastic seal having a seal lip slidably contacting the surface of the shaft; A support member that supports the inner peripheral surface side of the elastic seal at a position opposite to the sealing target fluid side from the seal lip; A sealing device comprising: The support member has a stepped annular member having a small-diameter portion on the sealing target fluid side and a large-diameter portion having an outer diameter larger than that of the small-diameter portion and opposite to the sealing target fluid side through the small-diameter portion. And composed of The elastic seal has an allowance for the inner peripheral surface of the shaft hole of the housing, and has an allowance for both the small diameter portion and the large diameter portion. It is fixed in a state where it is press-fitted between the surface and the support member.
- the elastic seal since the elastic seal is fixed in a press-fitted state, it is not necessary to fix the support member and the elastic seal with an adhesive. Therefore, it is not necessary to use an adhesive that is an environmental load substance. An adapter is also unnecessary. Further, since the elastic seal has a tightening margin for the support member, the elastic seal can be handled as one component by attaching the elastic seal to the support member. Therefore, the assembly workability is excellent.
- a first tightening margin portion provided on the radially outer side of a portion having a tightening margin with respect to the small diameter portion on the inner peripheral surface side, and the aforementioned
- a second fastening allowance provided on the radially outer side of the part having a fastening allowance with respect to the large diameter part is provided, and the outer diameter of the part between the first fastening allowance and the second fastening allowance Is preferably set smaller than the inner diameter of the shaft hole.
- part between a 1st fastening allowance part and a 2nd fastening allowance part is set smaller than the internal diameter of a shaft hole. Therefore, when attaching the elastic seal to the shaft hole, it is possible to suppress the first fastening margin and the second fastening margin from being abnormally deformed. Thereby, the positioning accuracy of the elastic seal can be increased.
- the seal lip includes a cylindrical root portion extending toward the fluid to be sealed, and a lip tip portion extending from the root portion toward the fluid to be sealed and radially inward to slidably contact the shaft surface. It is comprised and the inner peripheral surface side of the said base part is good to be supported by the said supporting member.
- the support member also functions as a backup ring that suppresses deformation of the seal lip to the side opposite to the sealing target fluid side.
- the elastic seal can be fixed with respect to the support member without using an adhesive or an adapter.
- FIG. 1 is a schematic sectional view showing an application example of a sealing device according to an embodiment of the present invention.
- FIG. 2 is a schematic cross-sectional view showing a usage state of the sealing device according to the embodiment of the present invention.
- Example With reference to FIG.1 and FIG.2, the sealing device based on the Example of this invention is demonstrated.
- FIG. 1 is a schematic cross-sectional view of a water pump 10 for an automobile.
- the water pump 10 includes a rotating shaft 21 and a housing 30 having a shaft hole through which the rotating shaft 21 is inserted.
- a bearing 22 for smooth rotation of the rotating shaft 21 is attached to the rotating shaft 21.
- a pulley 23 to which a rotational driving force is applied by a belt (not shown) or the like is attached to one end side of the rotating shaft 21, and an impeller 24 for pressure-feeding cooling water (LLC) is attached to the other end side.
- LLC pressure-feeding cooling water
- the sealing device 100 is arranged so that the cooling water leaks to the outside (that is, the side (A) opposite to the sealing target fluid side (L)). It arrange
- the fluid to be sealed is cooling water.
- FIG. 2 is a cross-sectional view taken along a plane including the central axis of the rotating shaft 21, and shows a cross section in a state where the sealing device 100 is used.
- the sealing device 100 has a rotationally symmetric shape except for the configuration of a screw groove 117 described later, and any cross section is the same except for the configuration of the screw groove 117 as long as the surface includes a central axis.
- the sleeve 25 is mounted on the rotary shaft 21, and the sealing device 100 is provided between the outer peripheral surface of the sleeve 25 made of metal such as stainless steel and the inner peripheral surface of the shaft hole 31 in the housing 30. Seal the annular gap.
- the shaft hole 31 of the housing 30 is provided with a step, and the sealing device 100 is mounted so as to be in close contact with the step surface 32 of the shaft hole 31.
- the outer peripheral surface of the sleeve 25 is preferably subjected to a hardening process such as a carburizing process or a nitriding process in order to suppress sliding wear.
- the sealing device 100 supports the elastic seal 110, the support member 120 that supports the elastic seal 110, the resin seal 130 that is provided on the inner peripheral surface side of the support member 120, and the resin seal 130. And a metal backup ring 140.
- the elastic seal 110 includes a body part 111 and a seal lip 112 provided integrally on the sealing target fluid side (L) of the body part 111.
- a first fastening margin 113 and a second fastening margin 114 are integrally provided on the outer peripheral surface side of the body portion 111, and a third fastening margin 115 and a fourth fastening margin are provided on the inner peripheral surface thereof. 116 is provided integrally.
- the seal lip 112 has a cylindrical root portion 112a extending toward the fluid to be sealed (L), and extends from the root portion 112a to the fluid to be sealed (L) and radially inward to the shaft surface (the sleeve 25). And a lip tip portion 112b slidably in contact with the outer peripheral surface). Further, on the inner peripheral surface side of the lip tip portion 112b, a thread groove 117 is provided that exhibits a function of returning the sealing target fluid to the sealing target fluid side (L) when the rotary shaft 21 rotates.
- the support member 120 As the material of the support member 120 , a highly rigid material such as a metal such as stainless steel or a hard resin is used.
- the support member 120 has a small-diameter portion 121 on the sealing target fluid side (L) and an outer diameter larger than that of the small-diameter portion 121, and is on the side (A) opposite to the sealing target fluid side (L) via the small-diameter portion 121.
- a stepped annular member having a large diameter portion 122 is formed.
- the inner peripheral surface side of the elastic seal 110 is supported on the outer peripheral surface side of the small diameter portion 121 and the large diameter portion 122.
- the outer peripheral surface side of the small diameter portion 121 supports not only the inner peripheral surface side of the body portion 111 in the elastic seal 110 but also the inner peripheral surface side of the root portion 112 a of the seal lip 112.
- the small-diameter portion 121 and the large-diameter portion 122 are connected by a step portion 123 that is perpendicular to the axial direction. Further, inward flange portions 124 and 125 are provided on the sealing target fluid side (L) and the opposite side (A) of the support member 120, respectively.
- the third fastening margin 115 in the elastic seal 110 described above is a fastening margin for the small-diameter portion 121 of the support member 120
- the fourth fastening margin 116 is for the large-diameter portion 122 of the support member 120.
- This is the closing part. That is, the inner diameter of the third tightening margin 115 is set smaller than the outer diameter of the small diameter portion 121, and the inner diameter of the fourth tightening margin 116 is set smaller than the outer diameter of the large diameter portion 122.
- first tightening margin 113 is provided on the outer side in the radial direction of the third tightening margin 115, and the first tightening margin 113 and the region of the third tightening margin 115 overlap in the radial direction (same position). Is located).
- second fastening margin 114 is provided on the radially outer side of the fourth fastening margin 116, and the region of the second fastening margin 114 and the fourth fastening margin 116 overlap in the radial direction (same position). Is located).
- the outer diameters of the first fastening margin 113 and the second fastening margin 114 are set larger than the inner diameter of the shaft hole 31.
- the outer diameter of the portion between the first tightening margin 113 and the second tightening margin 114 is set smaller than the inner diameter of the shaft hole 31.
- the elastic seal 110 is shown in a state where it does not receive external force. Accordingly, the first fastening margin 113, the second fastening margin 114, the third fastening margin 115, and the fourth fastening margin 116 indicated by dotted lines are actually compressed in the mounted state.
- the elastic seal 110 is fixed in a state of being press-fitted between the inner peripheral surface of the shaft hole 31 and the support member 120.
- a resin seal 130 made of PTFE or the like and a metal backup ring 140 such as stainless steel are provided on the inner peripheral surface side of the large diameter portion 122 in the support member 120.
- the resin seal 130 includes a lip portion 131 that is slidably in contact with the shaft surface (the outer peripheral surface of the sleeve 25), a tightening margin portion 132 for the inner peripheral surface of the large-diameter portion 122 of the support member 120, and a step portion 123. And a compressed part 133 to be compressed.
- the resin seal 130 is shown in a state where it does not receive external force. Therefore, the tightening allowance portion 132 and the compressed portion 133 indicated by dotted lines are actually compressed in the mounted state.
- the resin seal 130 and the backup ring 140 are fixed to the support member 120 by being sandwiched between the stepped portion 123 and the inward flange portion 124 of the support member 120.
- the sealing device 100 since the elastic seal 110 is fixed in a press-fitted state, it is not necessary to fix the support member 120 and the elastic seal 110 with an adhesive. Therefore, it is not necessary to use an adhesive that is an environmental load substance. Moreover, an adapter is not required as in the prior art. Furthermore, the elastic seal 110 also has a tightening margin (a third tightening margin 115 and a fourth tightening margin 116) with respect to the support member 120. Therefore, by attaching the elastic seal 110 to the support member 120, these can be handled as one component. In this embodiment, the resin seal 130 and the backup ring 140 are also fixed to the support member 120. Therefore, these four members can be handled as one component. Therefore, the assembly workability is excellent.
- the elastic seal 110 can be stably fixed while suppressing the deformation of the seal lip 112. That is, in the elastic seal 110, the deformation of the seal lip 112 can be suppressed by the third tightening margin 115 and the first tightening margin 113 on the fluid to be sealed (L) side.
- the fourth tightening allowance 116 and the second allowance allowance 114 with respect to the large diameter portion 122 provide a large crushing rate even with a small tightening allowance, so that even if the axial length is short, the force tightened by press-fitting is increased.
- the elastic seal 110 can be stably fixed without increasing the length in the axial direction. Further, the outer diameter of the portion between the first tightening margin 113 and the second tightening margin 114 is set smaller than the inner diameter of the shaft hole 31. Therefore, when attaching the elastic seal 110 to the shaft hole 31, it is possible to suppress the first fastening margin 113 and the second fastening margin 114 from being deformed abnormally. Thereby, the positioning accuracy of the elastic seal 110 can be increased.
- the support member 120 also functions as a backup ring that suppresses deformation of the seal lip 112 to the side (A) opposite to the fluid to be sealed (L).
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Devices (AREA)
Abstract
Description
相対的に回転する軸とハウジングとの間の環状隙間を密封する密封装置において、
前記軸の表面に摺動自在に接触するシールリップを有する弾性体製シールと、
前記シールリップよりも密封対象流体側とは反対側の位置で該弾性体製シールの内周面側を支持する支持部材と、
を備える密封装置であって、
前記支持部材は、密封対象流体側の小径部と、該小径部よりも外径が大きく、該小径部を介して密封対象流体側とは反対側の大径部とを有する段差付きの環状部材で構成されると共に、
前記弾性体製シールは、前記ハウジングの軸孔内周面に対して締め代を有し、かつ前記小径部と大径部の双方に対して締め代を有しており、前記軸孔内周面と支持部材との間に圧入された状態で固定されることを特徴とする。
図1及び図2を参照して、本発明の実施例に係る密封装置について説明する。
図1を参照して、本発明の実施例に係る密封装置100の適用例を説明する。図1は自動車用のウォーターポンプ10の模式的断面図である。ウォーターポンプ10は、回転軸21と、回転軸21が挿通される軸孔を有するハウジング30とを備えている。回転軸21には、回転軸21の回転を円滑にするためのベアリング22が取り付けられている。また、回転軸21の一端側には不図示のベルト等によって回転駆動力が与えられるプーリー23が取り付けられており、他端側には冷却水(LLC)を圧送するためのインペラー24が取り付けられている。そして、本実施例に係る密封装置100は、この冷却水が外部(すなわち、密封対象流体側(L)とは反対側(A))に漏れてしまうことを抑制するために、回転軸21とハウジング30との間の環状隙間に配置される。つまり、本実施例においては、密封対象流体は冷却水である。
図2を参照して、本発明の実施例に係る密封装置100について説明する。ここで、図2は回転軸21の中心軸線を含む面で切断した断面図であり、密封装置100を使用した状態における断面を示している。なお、密封装置100は後述するネジ溝117の構成を除き回転対称形状であり、中心軸線を含む面であれば、ネジ溝117の構成を除き、どの断面も同一である。
本実施例に係る密封装置100によれば、弾性体製シール110は圧入された状態で固定されるので、支持部材120と弾性体製シール110とを接着剤により固定する必要がない。従って、環境負荷物質である接着剤を用いる必要がない。また、従来のようにアダプターも不要である。更に、弾性体製シール110は、支持部材120に対しても締め代(第3締め代部115及び第4締め代部116)を有している。従って、支持部材120に弾性体製シール110を装着させることで、これらを1部品として取り扱うことが可能となる。また、本実施例においては、樹脂製シール130及びバックアップリング140も支持部材120に固定されている。従って、これらの4つの部材を1部品として取り扱うことができる。従って、組立作業性に優れている。
上記実施例においては、密封装置の適用例として、自動車用のウォーターポンプ10に用いられる場合を例にして説明した。しかしながら、本発明は相対的に回転する軸とハウジングとの間の環状隙間をシールする必要のある各種装置に適用可能である。また、上記実施例においては、回転軸21にスリーブ25を装着させる場合を示したが、本発明においては、軸の表面に対して、弾性体製シールのシールリップが直接摺動接触する場合にも適用可能である。
21 回転軸
22 ベアリング
23 プーリー
24 インペラー
25 スリーブ
30 ハウジング
31 軸孔
32 段差面
100 密封装置
110 弾性体製シール
111 胴体部
112 シールリップ
112a 根元部分
112b リップ先端部分
113 第1締め代部
114 第2締め代部
115 第3締め代部
116 第4締め代部
117 ネジ溝
120 支持部材
121 小径部
122 大径部
123 段差部
124,125 内向きフランジ部
130 樹脂製シール
131 リップ部
132 締め代部分
133 被圧縮部
140 バックアップリング
Claims (3)
- 相対的に回転する軸とハウジングとの間の環状隙間を密封する密封装置において、
前記軸の表面に摺動自在に接触するシールリップを有する弾性体製シールと、
前記シールリップよりも密封対象流体側とは反対側の位置で該弾性体製シールの内周面側を支持する支持部材と、
を備える密封装置であって、
前記支持部材は、密封対象流体側の小径部と、該小径部よりも外径が大きく、該小径部を介して密封対象流体側とは反対側の大径部とを有する段差付きの環状部材で構成されると共に、
前記弾性体製シールは、前記ハウジングの軸孔内周面に対して締め代を有し、かつ前記小径部と大径部の双方に対して締め代を有しており、前記軸孔内周面と支持部材との間に圧入された状態で固定されることを特徴とする密封装置。 - 前記弾性体製シールの外周面側には、内周面側における前記小径部に対して締め代を有する部位の径方向外側に設けられる第1締め代部と、内周面側における前記大径部に対して締め代を有する部位の径方向外側に設けられる第2締め代部とが設けられており、これら第1締め代部と第2締め代部との間の部位の外径は、前記軸孔の内径よりも小さく設定されていることを特徴とする請求項1に記載の密封装置。
- 前記シールリップは、密封対象流体側に向かって伸びる円筒状の根元部分と、該根元部分から密封対象流体側かつ径方向内側に伸びて前記軸表面に摺動自在に接触するリップ先端部分とから構成されており、前記根元部分の内周面側は前記支持部材により支持されていることを特徴とする請求項1又は2に記載の密封装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014559536A JP6143018B2 (ja) | 2013-01-29 | 2013-12-25 | 密封装置 |
| US14/439,725 US9297457B2 (en) | 2013-01-29 | 2013-12-25 | Sealing device |
| CN201380051054.4A CN104704271B (zh) | 2013-01-29 | 2013-12-25 | 密封装置 |
| EP13874206.9A EP2952788B1 (en) | 2013-01-29 | 2013-12-25 | Sealing device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013013942 | 2013-01-29 | ||
| JP2013-013942 | 2013-01-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2014119204A1 true WO2014119204A1 (ja) | 2014-08-07 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2013/084725 Ceased WO2014119204A1 (ja) | 2013-01-29 | 2013-12-25 | 密封装置 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US9297457B2 (ja) |
| EP (1) | EP2952788B1 (ja) |
| JP (1) | JP6143018B2 (ja) |
| CN (1) | CN104704271B (ja) |
| WO (1) | WO2014119204A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020190308A (ja) * | 2019-05-23 | 2020-11-26 | ナブテスコ株式会社 | シール構造、減速機、およびシール構造の製造方法 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112166268B (zh) * | 2018-08-28 | 2023-01-31 | Nok株式会社 | 树脂制盖中的密封结构 |
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| KR101222621B1 (ko) * | 2004-12-20 | 2013-01-16 | 이글 고오교 가부시키가이샤 | 샤프트 실링장치 |
| DE102005024006B4 (de) * | 2005-05-25 | 2015-09-03 | Ab Skf | Kompressordichtung |
| KR101335636B1 (ko) * | 2006-03-08 | 2013-12-03 | 이구루코교 가부시기가이샤 | 씰 장치 |
| EP2172678B1 (en) * | 2007-08-02 | 2013-04-10 | Eagle Industry Co., Ltd. | Seal device |
| CN201339716Y (zh) * | 2008-12-29 | 2009-11-04 | 上海三电贝洱汽车空调有限公司 | 一种轴封 |
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2013
- 2013-12-25 JP JP2014559536A patent/JP6143018B2/ja not_active Expired - Fee Related
- 2013-12-25 CN CN201380051054.4A patent/CN104704271B/zh not_active Expired - Fee Related
- 2013-12-25 EP EP13874206.9A patent/EP2952788B1/en not_active Not-in-force
- 2013-12-25 WO PCT/JP2013/084725 patent/WO2014119204A1/ja not_active Ceased
- 2013-12-25 US US14/439,725 patent/US9297457B2/en not_active Expired - Fee Related
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| JPS6084863U (ja) * | 1983-11-17 | 1985-06-11 | エヌオーケー株式会社 | オイルシ−ル |
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| JPH02130466U (ja) * | 1989-04-04 | 1990-10-26 | ||
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| JP2004190844A (ja) | 2002-12-13 | 2004-07-08 | Eagle Ind Co Ltd | シール装置 |
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| JP2009127833A (ja) | 2007-11-28 | 2009-06-11 | Eagle Ind Co Ltd | リップタイプシール |
| WO2010061670A1 (ja) | 2008-11-27 | 2010-06-03 | イーグル工業株式会社 | リップタイプシール |
| JP2012122534A (ja) * | 2010-12-08 | 2012-06-28 | Nok Corp | 密封装置 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2020190308A (ja) * | 2019-05-23 | 2020-11-26 | ナブテスコ株式会社 | シール構造、減速機、およびシール構造の製造方法 |
| JP7398209B2 (ja) | 2019-05-23 | 2023-12-14 | ナブテスコ株式会社 | シール構造、減速機、およびシール構造の製造方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104704271A (zh) | 2015-06-10 |
| EP2952788A4 (en) | 2016-09-28 |
| EP2952788A1 (en) | 2015-12-09 |
| JPWO2014119204A1 (ja) | 2017-01-26 |
| CN104704271B (zh) | 2016-12-28 |
| US9297457B2 (en) | 2016-03-29 |
| JP6143018B2 (ja) | 2017-06-07 |
| US20150276062A1 (en) | 2015-10-01 |
| EP2952788B1 (en) | 2017-10-04 |
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