JP6708491B2 - Sealing device and bearing device including the same - Google Patents

Sealing device and bearing device including the same Download PDF

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JP6708491B2
JP6708491B2 JP2016125259A JP2016125259A JP6708491B2 JP 6708491 B2 JP6708491 B2 JP 6708491B2 JP 2016125259 A JP2016125259 A JP 2016125259A JP 2016125259 A JP2016125259 A JP 2016125259A JP 6708491 B2 JP6708491 B2 JP 6708491B2
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disc
elastic
seal
disc portion
seal member
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JP2017227305A (en
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昌範 柴山
昌範 柴山
康裕 阪本
康裕 阪本
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Uchiyama Manufacturing Corp
JTEKT Corp
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JTEKT Corp
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  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)

Description

本発明は、相対的に同軸回転する内側部材及び外側部材で構成される軸受装置に適用されるシール装置及びこれを備えた軸受装置に関する。 The present invention relates to a seal device applied to a bearing device composed of an inner member and an outer member that relatively rotate coaxially, and a bearing device including the seal device.

従来より、相対的に同軸回転する内側部材及び外側部材で構成される軸受装置に装着される密封装置が知られている。このような密封装置としては、一方の部材に装着される芯金に弾性部材からなるシールリップを設け、このシールリップを他方の部材に装着されるスリンガに弾性的に接触させる構成としたいわゆるパックシール（組み合わせシール）が知られている。このような密封装置では、シールリップがスリンガに摺るように接触するため摺動抵抗が高くなり、軸受装置のトルクが高くなる傾向があった。
例えば、下記特許文献１には、外輪に嵌合される第１の嵌合部の一端に、玉に近づく方向に斜めに折り曲げられた第１のシールド部を設けた第１のシールド部材と、内輪に嵌合される第２の嵌合部の一端に、玉から遠ざかる方向に斜めに折り曲げられた第２のシールド部を設けた第２のシールド部材と、を備えた転がり軸受が開示されている。この転がり軸受は、第１のシールド部と第２のシールド部とを互いに平行とし、これらの間にラビリンスシールを形成した構成とされている。 2. Description of the Related Art Conventionally, a sealing device mounted on a bearing device including an inner member and an outer member that relatively coaxially rotate has been known. As such a sealing device, a so-called pack having a structure in which a core metal attached to one member is provided with a seal lip made of an elastic member and the seal lip is elastically brought into contact with a slinger attached to the other member Seals (combined seals) are known. In such a sealing device, since the seal lip is slidably in contact with the slinger, the sliding resistance is increased and the torque of the bearing device tends to be increased.
For example, in Patent Document 1 below, a first shield member in which a first shield portion that is obliquely bent in a direction approaching a ball is provided at one end of a first fitting portion that is fitted to an outer ring, A rolling bearing including a second shield member having a second shield portion that is obliquely bent in a direction away from a ball is provided at one end of a second fit portion that is fitted to an inner ring. There is. This rolling bearing is configured such that the first shield portion and the second shield portion are parallel to each other and a labyrinth seal is formed between them.

また、下記特許文献２には、内輪に嵌合される円環部の外周面にラビリンスシールを構成する３条の鍔部を設けた第１環状部材と、それぞれの端面間寸法が第１環状部材の３条の鍔部の端面間寸法に対応するように配置され、これら３条の鍔部とによってラビリンスシールを構成する一対の鍔部が設けられた被覆部を有した第２環状部材と、を備えたシール構造が開示されている。このシール構造は、第２環状部材の被覆部に破断部を設けた構成とし、この破断された部位を離反させるように拡径させて第１環状部材の外周面に被せられた第２環状部材を外周面から覆うシールホルダを設けた構成とされている。
また、下記特許文献３には、外輪に取り付けられる外側剛性キャリアの環状脚部に、軸方向に延びる径方向内側及び外側のリップを設けた弾性シール本体を取り付けた構成とし、車軸周りに配置される金属内側スリーブの径方向外向きに延びる障壁に、弾性シール本体のリップ間に配されて非接触ラビリンス通路を形成する軸方向に延びる環状突出部を設けた構成としたシールアセンブリが開示されている。また、金属内側スリーブに、アセンブリを組み立てられた状態に維持する封じ込めフランジを径方向外向きに延びるように設けた構成としている。 Further, in Patent Document 2 below, a first annular member in which three ribs forming a labyrinth seal are provided on an outer peripheral surface of an annular portion fitted to an inner ring, and a dimension between respective end surfaces is a first annular member. A second annular member having a covering portion which is arranged so as to correspond to the dimension between the end faces of the three flange portions of the member, and which is provided with a pair of flange portions that form a labyrinth seal with these three flange portions; There is disclosed a seal structure provided with. This seal structure has a structure in which a breaking portion is provided in the covering portion of the second annular member, and the diameter of the broken portion is expanded so as to separate the second annular member, and the second annular member is covered on the outer peripheral surface of the first annular member. A seal holder is provided to cover the outer peripheral surface of the seal holder.
Further, in Patent Document 3 below, an elastic leg body having radial inner and outer lips extending in the axial direction is attached to an annular leg portion of an outer rigid carrier attached to an outer ring, and is arranged around an axle. A seal assembly is disclosed in which a radially outwardly extending barrier of a metal inner sleeve is provided with an axially extending annular protrusion disposed between lips of an elastic seal body to form a non-contact labyrinth passage. There is. The metal inner sleeve is also provided with a containment flange that extends radially outwardly to maintain the assembly in the assembled condition.

特開２０１２−１９３７６１号公報JP2012-193761A 特開２０００−６０６号公報Japanese Patent Laid-Open No. 2000-606 特許第５６６５１８３号公報Patent No. 5665183

しかしながら、上記特許文献１に記載された転がり軸受では、第１のシールド部材と第２のシールド部材とは、転がり軸受に組み付けられていない状態では、分離した状態となり、取扱性及び組付性の観点からは更なる改善が望まれる。
また、上記特許文献２に記載されたシール構造では、第２環状部材を拡径させて第１環状部材の外周面に被せた後に、固定ボルトによって互いに固定される一対のリング部材からなるシールホルダを、第２環状部材を覆うように設ける必要がある。また、上記特許文献３に記載されたシールアセンブリにおいても、外側剛性キャリアと金属内側スリーブとを組み立てた状態に維持するためには、これらを組み合わせた状態で、金属内側スリーブの端部を加締め等によって折り曲げて封じ込めフランジを形成する必要があり、これら特許文献２，３に記載されたシール構造やシールアセンブリでは、組付工程が複雑化するという問題があった。 However, in the rolling bearing described in Patent Document 1, the first shield member and the second shield member are in a separated state in a state where they are not assembled to the rolling bearing, and thus the handling and the assembling are easy. From the viewpoint, further improvement is desired.
In addition, in the seal structure described in Patent Document 2, a seal holder including a pair of ring members that are fixed to each other by fixing bolts after the diameter of the second annular member is expanded to cover the outer peripheral surface of the first annular member. Need to be provided so as to cover the second annular member. Further, in the seal assembly described in Patent Document 3 as well, in order to maintain the outer rigid carrier and the metal inner sleeve in the assembled state, the end portion of the metal inner sleeve is caulked in the combined state. It is necessary to fold it to form the containment flange, and the sealing structures and seal assemblies described in Patent Documents 2 and 3 have a problem that the assembly process is complicated.

本発明は、上記実情に鑑みなされたものであり、軸受装置のトルクの低減が可能で、シール性の向上が可能でありながらも、第１シール部材と第２シール部材とを簡易に組み合わせ状態に維持し得るシール装置及びこれを備えた軸受装置を提供することを目的としている。 The present invention has been made in view of the above circumstances, and it is possible to reduce the torque of the bearing device and improve the sealing performance, but also to easily combine the first seal member and the second seal member. It is an object of the present invention to provide a seal device that can be maintained at a high temperature and a bearing device including the seal device.

前記目的を達成するために、本発明に係るシール装置は、相対的に同軸回転する内側部材及び外側部材のうちの一方の部材に装着される第１シール部材と他方の部材に装着される第２シール部材とを備えており、前記第１シール部材は、前記一方の部材に嵌合される第１円筒部と、該第１円筒部の軸方向に間隔を空けた部位からそれぞれ径方向に突出するように設けられた第１円板部及び第２円板部と、を有し、前記第２シール部材は、前記他方の部材に嵌合される第２円筒部と、該第２円筒部から径方向に突出するように設けられ、かつ前記第１シール部材の第１円筒部、第１円板部及び第２円板部によって区画された溝部に挿入される第３円板部と、を有し、前記第１円板部が弾性を有した円板部とされ、該円板部の弾性変形を伴って前記第３円板部が前記溝部に挿入可能とされており、前記第１シール部材及び前記第２シール部材が前記内側部材及び前記外側部材に装着された状態で、前記内側部材及び前記外側部材間の被シール空間と外部空間とを連通させるラビリンスシールを構成する軸方向に延びる複数の非接触シール部と径方向に延びる複数の非接触シール部とが交互に形成される構成とされており、前記溝部の軸方向に沿う溝幅寸法は、前記第１円板部の前記第１円筒部からの突出寸法と前記第３円板部の軸方向に沿う厚さ寸法とを足し合わせた寸法よりも大とされていることを特徴とする。
また、前記目的を達成するために、本発明に係るシール装置は、相対的に同軸回転する内側部材及び外側部材のうちの一方の部材に装着される第１シール部材と他方の部材に装着される第２シール部材とを備えており、前記第１シール部材は、前記一方の部材に嵌合される第１円筒部と、該第１円筒部の軸方向に間隔を空けた部位からそれぞれ径方向に突出するように設けられた第１円板部及び第２円板部と、を有し、前記第２シール部材は、前記他方の部材に嵌合される第２円筒部と、該第２円筒部から径方向に突出するように設けられ、かつ前記第１シール部材の第１円筒部、第１円板部及び第２円板部によって区画された溝部に挿入される第３円板部と、を有し、前記第３円板部が弾性を有した円板部とされ、弾性変形を伴って前記溝部に挿入可能とされており、前記第１シール部材及び前記第２シール部材が前記内側部材及び前記外側部材に装着された状態で、前記内側部材及び前記外側部材間の被シール空間と外部空間とを連通させるラビリンスシールを構成する軸方向に延びる複数の非接触シール部と径方向に延びる複数の非接触シール部とが交互に形成される構成とされており、前記溝部の軸方向に沿う溝幅寸法は、前記第３円板部の前記第２円筒部からの突出寸法よりも大とされ、前記第３円板部の軸方向に沿う厚さ寸法は、前記第１円板部の周端部と前記第２円筒部とが対向されて形成される前記軸方向に延びる非接触シール部の径方向に沿う寸法よりも小とされていることを特徴とする。 In order to achieve the above object, a sealing device according to the present invention includes a first seal member mounted on one member of an inner member and an outer member that rotate relative to each other and a first seal member mounted on the other member. And a first cylindrical member fitted to the one member, and a radial direction from a portion of the first cylindrical member axially spaced from each other. A second circular cylinder part fitted to the other member, and a second circular cylinder part having a first circular plate part and a second circular plate part provided so as to project. A third disc portion that is provided so as to project in the radial direction from the portion and that is inserted into a groove portion defined by the first cylindrical portion, the first disc portion, and the second disc portion of the first seal member; And the first disc part is a disc part having elasticity, and the third disc part can be inserted into the groove part with elastic deformation of the disc part. A shaft forming a labyrinth seal that communicates a sealed space between the inner member and the outer member with an outer space in a state where the first seal member and the second seal member are mounted on the inner member and the outer member. The plurality of non-contact seal portions extending in the direction and the plurality of non-contact seal portions extending in the radial direction are alternately formed, and the groove width dimension along the axial direction of the groove portion is the first circular plate. It is characterized in that it is larger than the sum of the projecting dimension of the portion from the first cylindrical portion and the thickness dimension of the third disc portion along the axial direction .
In addition, in order to achieve the above-mentioned object, a sealing device according to the present invention is mounted on a first sealing member mounted on one of an inner member and an outer member that relatively rotate coaxially and on the other member. And a second seal member, wherein the first seal member has a diameter from a first cylindrical portion fitted to the one member and a portion spaced apart in the axial direction of the first cylindrical portion. A first cylindrical portion and a second circular disk portion provided so as to project in a direction, the second seal member includes a second cylindrical portion fitted to the other member, and the second cylindrical portion. A third disc that is provided so as to project from the two cylindrical portions in the radial direction and that is inserted into a groove portion defined by the first cylindrical portion, the first disc portion, and the second disc portion of the first seal member. And a third disc part is an elastic disc part that can be inserted into the groove part with elastic deformation, and the first seal member and the second seal member. And a plurality of non-contact seal portions extending in the axial direction that form a labyrinth seal that communicates the sealed space between the inner member and the outer member with the outer space in a state of being attached to the inner member and the outer member. A plurality of non-contact seal portions extending in the radial direction are alternately formed, and the groove width dimension along the axial direction of the groove portion is such that the third disk portion projects from the second cylindrical portion. The thickness dimension along the axial direction of the third disk portion is larger than the dimension, and the thickness direction along the axial direction is such that the circumferential end portion of the first disk portion and the second cylindrical portion are formed to face each other. Is smaller than the dimension of the non-contact seal portion extending in the radial direction.

本発明によれば、軸受装置のトルクの低減が可能で、シール性の向上が可能でありながらも、第１シール部材と第２シール部材とを簡易に組み合わせ状態に維持することができる。つまり、第１シール部材と第２シール部材とを相対的に軸方向に沿う方向に移動させれば、弾性を有した円板部の弾性変形を伴って第３円板部を溝部に挿入させることができる。これにより、第１シール部材の第１円筒部と第２円筒部とによって第２シール部材の第３円筒部が挟まれるように保持され、第１シール部材と第２シール部材とを組み合わせた状態に維持することができ、取扱性及び軸受装置への組付性を向上させることができる。また、組み合わせた状態で他の部材によって覆う必要があるものや加締め等の必要があるものと比べて、第１シール部材と第２シール部材とを簡易に組み合わせ状態に維持することができる。
また、これら第１シール部材及び第２シール部材によって非接触型シールを構成することができるので、弾性的に接触するシールリップを有したものと比べて、軸受装置のトルクを低減することができ、また、摩耗等による劣化が生じ難くなるので、耐用寿命の長期化を図ることができる。また、軸方向に延びる少なくとも２つの非接触シール部と径方向に延びる少なくとも２つの非接触シール部とが交互に形成されることとなるので、比較的に複雑な経路のラビリンスシールを構成することができ、シール性能を向上させることができる。これにより、軸受装置の被シール空間に充填されたグリースの外部空間への漏洩を抑制することができ、また、外部空間から軸受装置の被シール空間への塵埃等の侵入を抑制することができる。 According to the present invention, the torque of the bearing device can be reduced and the sealing performance can be improved, but the first seal member and the second seal member can be easily maintained in the combined state. That is, when the first seal member and the second seal member are relatively moved in the direction along the axial direction, the third disk portion is inserted into the groove portion with elastic deformation of the elastic disk portion. be able to. Thereby, the third cylindrical portion of the second seal member is held so as to be sandwiched by the first cylindrical portion and the second cylindrical portion of the first seal member, and the first seal member and the second seal member are combined. Therefore, it is possible to improve the handleability and the assemblability to the bearing device. Further, the first seal member and the second seal member can be easily maintained in the combined state as compared with the combined state in which it is necessary to cover with another member or the case where caulking or the like is required.
Further, since the non-contact type seal can be constituted by the first seal member and the second seal member, the torque of the bearing device can be reduced as compared with a seal lip that elastically contacts. In addition, since deterioration due to wear or the like is less likely to occur, the service life can be extended. Further, at least two non-contact seal portions extending in the axial direction and at least two non-contact seal portions extending in the radial direction are alternately formed, so that a labyrinth seal having a relatively complicated path can be configured. It is possible to improve the sealing performance. With this, it is possible to suppress leakage of the grease filled in the sealed space of the bearing device to the external space, and also to prevent intrusion of dust and the like from the external space into the sealed space of the bearing device. ..

本発明においては、前記第３円板部が前記溝部に挿入された状態で、該第３円板部の軸方向両側と前記第１円板部及び前記第２円板部とが対向されて前記径方向に延びる非接触シール部が形成され、該第３円板部の周端部と前記第１円筒部とが対向されて前記軸方向に延びる非接触シール部が形成される構成としてもよい。
本発明によれば、第１シール部材の溝部の溝底面及び溝幅方向両面と第３円板部の周端面及び軸方向両面とがそれぞれ対向されて径方向に延びる２つの非接触シール部と軸方向に延びる１つの非接触シール部とを形成することができる。 In the present invention, with the third disc portion inserted in the groove, both axial sides of the third disc portion and the first disc portion and the second disc portion are opposed to each other. The non-contact seal portion extending in the radial direction is formed, and the peripheral end portion of the third disc portion and the first cylindrical portion are opposed to each other to form the non-contact seal portion extending in the axial direction. Good.
According to the present invention, two non-contact seal portions that extend in the radial direction with the groove bottom surface and both surfaces in the groove width direction of the groove portion of the first seal member and the circumferential end surface and both surfaces in the axial direction of the third disk portion facing each other, respectively. One non-contact seal portion extending in the axial direction can be formed.

本発明においては、前記第１円板部の周端部及び前記第２円板部の周端部とこれらが対向される部位とが対向されて前記軸方向に延びる非接触シール部が形成される構成としてもよい。
本発明によれば、外部空間側及び被シール空間側のうちの一方側に配されることとなる第１円板部の周端部とこれが対向される部位とが対向されて軸方向に延びる非接触シール部が形成され、外部空間側及び被シール空間側のうちの他方側に配されることとなる第２円板部の周端部とこれが対向される部位とが対向されて軸方向に延びる非接触シール部が形成される。つまり、被シール空間と外部空間とを連通させるラビリンスシールの被シール空間側及び外部空間側のそれぞれに軸方向に延びる非接触シール部が形成されることとなる。これにより、軸受装置の被シール空間に充填されたグリースの外部空間への漏洩をより効果的に抑制することができ、また、外部空間から軸受装置の被シール空間への塵埃等の侵入をより効果的に抑制することができる。 In the present invention, the peripheral end portion of the first disc portion and the peripheral end portion of the second disc portion are opposed to the portion where they are opposed to each other to form a non-contact seal portion extending in the axial direction. May be configured.
According to the present invention, the circumferential end portion of the first disk portion, which is to be arranged on one of the external space side and the sealed space side, and the portion facing the circumferential end portion are opposed to each other and extend in the axial direction. The non-contact seal portion is formed, and the peripheral end portion of the second disk portion, which is to be arranged on the other side of the external space side and the sealed space side, is opposed to the portion facing the peripheral end portion in the axial direction. A non-contact seal portion extending to the is formed. That is, a non-contact seal portion extending in the axial direction is formed on each of the sealed space side and the external space side of the labyrinth seal that connects the sealed space and the external space. As a result, the grease filled in the sealed space of the bearing device can be more effectively suppressed from leaking to the external space, and dust and the like can be prevented from entering the sealed space of the bearing device from the external space. It can be effectively suppressed.

本発明においては、前記第１円板部を、前記第１円筒部からの突出寸法が前記第２円板部の前記第１円筒部からの突出寸法よりも小とされたものとし、前記第１円板部及び前記第３円板部のうちの少なくとも一つを前記弾性を有した円板部とし、前記第１円板部の周端部と前記第３円板部の周端部とが軸方向に見て互いに重なり合うように配される構成としてもよい。
本発明によれば、突出寸法が小とされた第１円板部側から第３円板部を相対的に軸方向に移動させることで、第１円板部及び第３円板部の両方または一方の弾性変形を伴って第３円板部を溝部に容易に挿入させることができる。 In the present invention, the first disc portion is configured such that a projecting dimension from the first cylindrical portion is smaller than a projecting dimension of the second disc portion from the first cylindrical portion, At least one of the first disc portion and the third disc portion is the elastic disc portion, and the peripheral end portion of the first disc portion and the peripheral end portion of the third disc portion are May be arranged so as to overlap each other when viewed in the axial direction.
According to the present invention, both the first disc portion and the third disc portion are moved by relatively moving the third disc portion in the axial direction from the side of the first disc portion having a small protruding dimension. Alternatively, the third disk portion can be easily inserted into the groove portion with elastic deformation of one side.

本発明においては、前記第３円板部の周端部と前記第１円板部及び前記第２円板部とは、軸方向に見て全周に亘って互いに重なり合うように配される構成としてもよい。
本発明によれば、これら第１円板部、第２円板部及び第３円板部のうちの少なくとも一つの周端部に切欠状の凹部を設けて互いに重なり合わない箇所を設けたようなものと比べて、シール性を効果的に向上させることができる。 In the present invention, the peripheral end portion of the third disc portion and the first disc portion and the second disc portion are arranged so as to overlap each other over the entire circumference when viewed in the axial direction. May be
According to the present invention, at least one of the first disk portion, the second disk portion and the third disk portion is provided with a notch-shaped recess at the peripheral end portion so as not to overlap with each other. It is possible to effectively improve the sealing property as compared with other materials.

本発明においては、前記第１円板部を前記弾性を有した円板部とし、前記溝部の軸方向に沿う溝幅寸法を、前記第１円板部の前記第１円筒部からの突出寸法と前記第３円板部の軸方向に沿う厚さ寸法とを足し合わせた寸法よりも大としてもよい。
本発明によれば、第１シール部材と第２シール部材とを相対的に軸方向に沿う方向に移動させて第１円板部の弾性変形を伴って第３円板部を溝部に挿入させて組み合わせた際に、第１円板部が倒れた状態となることを抑制することができる。つまり、第１シール部材と第２シール部材とを相対的に軸方向に沿う方向に移動させれば、第１円板部が第３円板部に押さえ付けられるようにして倒伏された状態となるが、第３円板部を第２円板部に近接または当接させれば、第３円板部が第１円板部を乗り越えた状態となり、第１円板部の復元が可能となる。 In the present invention, the first circular disk portion is the elastic circular disk portion, and the groove width dimension along the axial direction of the groove portion is the protrusion dimension of the first circular disk portion from the first cylindrical portion. And a thickness dimension along the axial direction of the third disc portion may be larger than the sum of the dimensions.
According to the present invention, the first seal member and the second seal member are relatively moved in the direction along the axial direction so that the third disc portion is inserted into the groove portion with the elastic deformation of the first disc portion. It is possible to prevent the first disc portion from falling when combined with each other. That is, when the first seal member and the second seal member are relatively moved in the direction along the axial direction, the first disc portion is pressed down by the third disc portion and is in a laid-down state. However, if the third disk portion is brought close to or in contact with the second disk portion, the third disk portion gets over the first disk portion, and the first disk portion can be restored. Become.

本発明においては、前記弾性を有した円板部を、周方向に見た断面形状が軸方向中心線を対称軸とする線対称状となるように形成されたものとしてもよい。
例えば、弾性を有した円板部を、軸方向一方に傾斜したリップ状の形状としたり、軸方向一方側に凹部が設けられた形状としたりした場合において、この円板部が回転側となる部材に設けられた場合には、この円板部が遠心力によって倒れるように変形したり、起き上がるように変形したりするようなことが考えられ、これにより、この円板部が対向する部位に接触してしまうようなことが考えられる。本発明によれば、弾性を有した円板部が回転側となる部材に設けられる場合にも、遠心力よる変形を抑制することができ、この円板部とこれが対向する部位との非接触シール部を確保することができる。 In the present invention, the elastic disk portion may be formed so that the cross-sectional shape viewed in the circumferential direction is line-symmetrical with the axis of symmetry as the axis of symmetry.
For example, when the elastic disc portion is formed into a lip shape inclined to one side in the axial direction or has a concave portion provided on one side in the axial direction, the disc portion becomes the rotation side. When provided on a member, it is conceivable that the disk portion may be deformed so as to fall or rise due to centrifugal force. It is possible that they may come into contact. According to the present invention, even when an elastic disk portion is provided on a member on the rotation side, deformation due to centrifugal force can be suppressed, and the disk portion and the portion facing it do not come into contact with each other. The seal part can be secured.

また、前記目的を達成するために、本発明に係る軸受装置は、相対的に同軸回転する内側部材及び外側部材と、これらに装着される本発明に係るシール装置と、を備えていることを特徴とする。
本発明によれば、上記のようにトルクを低減することができ、また、シール性を向上させることができる。 Further, in order to achieve the above object, the bearing device according to the present invention includes an inner member and an outer member that relatively coaxially rotate, and a sealing device according to the present invention attached to these members. Characterize.
According to the present invention, as described above, the torque can be reduced and the sealing property can be improved.

本発明に係るシール装置及びこれを備えた軸受装置は、上述のような構成としたことで、軸受装置のトルクの低減が可能で、シール性の向上が可能でありながらも、第１シール部材と第２シール部材とを簡易に組み合わせ状態に維持することができる。 The seal device according to the present invention and the bearing device including the seal device are configured as described above, so that the torque of the bearing device can be reduced and the sealability can be improved, while the first seal member is also provided. The second seal member and the second seal member can be easily maintained in the combined state.

本発明の一実施形態に係るシール装置の一例及びこれを備えた軸受装置の一例を模式的に示す概略縦断面図である。FIG. 1 is a schematic vertical cross-sectional view schematically showing an example of a seal device according to an embodiment of the present invention and an example of a bearing device including the seal device. （ａ）は、図１におけるＸ部に対応させた一部破断概略拡大縦断面図、（ｂ）は、同シール装置を組み合わせる際の状態を模式的に示す（ａ）に対応させた概略縦断面図である。(A) is a partially broken schematic enlarged vertical cross-sectional view corresponding to the X part in FIG. 1, and (b) is a schematic vertical sectional view corresponding to (a) schematically showing a state when the sealing device is combined. It is a side view. 図１におけるＶ方向から見た同シール装置の概略側面図である。It is a schematic side view of the same sealing device seen from the V direction in FIG. （ａ）は、本発明の他の実施形態に係るシール装置の一例及びこれを備えた軸受装置の一例を模式的に示し、図２（ａ）に対応させた一部破断概略拡大縦断面図、（ｂ）は、同シール装置を組み合わせる際の状態を模式的に示す（ａ）に対応させた概略縦断面図である。FIG. 2A is a partially cutaway schematic enlarged vertical cross-sectional view schematically showing an example of a seal device according to another embodiment of the present invention and an example of a bearing device including the seal device, and FIG. , (B) are schematic vertical cross-sectional views corresponding to (a) schematically showing a state in which the same sealing device is assembled. （ａ）は、本発明の更に他の実施形態に係るシール装置の一例及びこれを備えた軸受装置の一例を模式的に示し、図２（ａ）に対応させた一部破断概略拡大縦断面図、（ｂ）は、同シール装置を組み合わせる際の状態を模式的に示す（ａ）に対応させた概略縦断面図である。FIG. 2A schematically shows an example of a sealing device according to still another embodiment of the present invention and an example of a bearing device including the same, and a partially cutaway schematic enlarged vertical cross-section corresponding to FIG. Drawing (b) is an outline longitudinal section corresponding to (a) which shows typically the state at the time of combining the same sealing device. （ａ）は、本発明の更に他の実施形態に係るシール装置の一例及びこれを備えた軸受装置の一例を模式的に示し、図２（ａ）に対応させた一部破断概略拡大縦断面図、（ｂ）は、同シール装置を組み合わせる際の状態を模式的に示す（ａ）に対応させた概略縦断面図である。FIG. 2A schematically shows an example of a sealing device according to still another embodiment of the present invention and an example of a bearing device including the same, and a partially cutaway schematic enlarged vertical cross-section corresponding to FIG. Drawing (b) is an outline longitudinal section corresponding to (a) which shows typically the state at the time of combining the same sealing device. （ａ）は、本発明の更に他の実施形態に係るシール装置の一例及びこれを備えた軸受装置の一例を模式的に示し、図２（ａ）に対応させた一部破断概略拡大縦断面図、（ｂ）は、同シール装置を組み合わせる際の状態を模式的に示す（ａ）に対応させた概略縦断面図である。FIG. 2A schematically shows an example of a sealing device according to still another embodiment of the present invention and an example of a bearing device including the same, and a partially cutaway schematic enlarged vertical cross-section corresponding to FIG. Drawing (b) is an outline longitudinal section corresponding to (a) which shows typically the state at the time of combining the same sealing device.

以下に、本発明の実施の形態について、図面を参照しながら説明する。
なお、一部の図では、他図に付している詳細な符号の一部を省略している。
また、図２、図４〜図７では、切断面の後方側の図示を省略した切断部端面図として図示している。
図１〜図３は、第１実施形態に係るシール装置の一例及びこれを備えた軸受装置の一例を模式的に示す図である。 Embodiments of the present invention will be described below with reference to the drawings.
Note that in some of the drawings, some of the detailed reference numerals attached to other drawings are omitted.
Moreover, in FIG. 2, FIG. 4 to FIG. 7, the rear side of the cut surface is illustrated as an end view of the cut portion, which is not shown.
1 to 3 are diagrams schematically showing an example of the seal device according to the first embodiment and an example of a bearing device including the seal device.

本実施形態に係るシール装置９は、図１に示すように、相対的に同軸回転する内側部材としての内輪４及び外側部材としての外輪５で構成される軸受装置１に装着される構成とされている。
本実施形態に係る軸受装置１は、内輪４及び外輪５と、これらに装着される本実施形態に係るシール装置９と、を備えている。
図１では、内輪４に軸２が挿通され、外輪５がハウジング等の軸受部分３に嵌め込まれた例を示している。なお、軸２が軸受部分３に対して回転、つまり、回転部材としての内輪４が固定部材としての外輪５に対して回転される態様に限られず、外輪５が内輪４に対して回転される態様としてもよい。
また、軸受装置１は、内輪４と外輪５との間に転動体（図例では、玉）８を介装させた転がり軸受装置とされている。
これら内輪４と外輪５との間に、全周に亘って環状に被シール空間６が形成される。 As shown in FIG. 1, the sealing device 9 according to the present embodiment is configured to be mounted on a bearing device 1 including an inner ring 4 serving as an inner member and an outer ring 5 serving as an outer member, which relatively coaxially rotate. ing.
The bearing device 1 according to the present embodiment includes an inner ring 4 and an outer ring 5, and a sealing device 9 according to the present embodiment attached to these.
FIG. 1 shows an example in which the shaft 2 is inserted through the inner ring 4 and the outer ring 5 is fitted in the bearing portion 3 such as a housing. Note that the shaft 2 is rotated with respect to the bearing portion 3, that is, the inner ring 4 as a rotating member is rotated with respect to the outer ring 5 as a fixed member, and the outer ring 5 is rotated with respect to the inner ring 4. It may be an aspect.
Further, the bearing device 1 is a rolling bearing device in which rolling elements (balls in the illustrated example) 8 are interposed between the inner ring 4 and the outer ring 5.
An annular sealed space 6 is formed between the inner ring 4 and the outer ring 5 over the entire circumference.

被シール空間６には、単列の転動体８がリテーナ（保持器）７に保持された状態で、内輪４の軌道輪４ａ及び外輪５の軌道輪５ａを転動可能に介装されており、グリースが充填されている。なお、軸受装置１としては、内輪４と外輪５との間に、複列状に転動体８を設けた構成としてもよい。また、軸受装置１としては、図例のように、内輪４及び外輪５に、溝状の軌道輪４ａ，５ａを設けた深溝玉軸受に限られず、アンギュラ玉軸受としてもよい。また、軸受装置１としては、転動体８を玉（ボール）とした玉軸受に限られず、転動体８を円筒ころや円錐ころ等としたころ軸受としてもよく、また、内輪４及び外輪５のうちの一方にフランジ状やハブ状等の固定部を有した軸受装置１としてもよい。
また、被シール空間６における軸２方向両側端部の内輪４と外輪５との間に、本実施形態に係るシール装置９，９をそれぞれに装着した構造としている。これら軸２方向両側のシール装置９，９によって被シール空間６の軸２方向両端部がシールされ、被シール空間６内への異物等の侵入や被シール空間６内に充填されたグリースの外部への漏出が抑制される。なお、これら軸２方向両側のシール装置９，９は、互いに同様の構成であるので、以下では、一方のシール装置９を例にとって説明する。 In the sealed space 6, a single row of rolling elements 8 is held by a retainer (retainer) 7, and a race ring 4a of the inner ring 4 and a race ring 5a of the outer ring 5 are rollably interposed. , Filled with grease. The bearing device 1 may have a configuration in which the rolling elements 8 are provided in a double row between the inner ring 4 and the outer ring 5. Further, the bearing device 1 is not limited to the deep groove ball bearing in which the inner ring 4 and the outer ring 5 are provided with the groove-shaped race rings 4a and 5a as shown in the example, and may be an angular ball bearing. Further, the bearing device 1 is not limited to a ball bearing in which the rolling elements 8 are balls, and may be a roller bearing in which the rolling elements 8 are cylindrical rollers or tapered rollers. The bearing device 1 may have a flange-shaped or hub-shaped fixed portion on one side.
In addition, the seal device 9 according to the present embodiment is mounted between the inner ring 4 and the outer ring 5 at both ends of the sealed space 6 in the axial direction 2 respectively. Both ends of the sealed space 6 in the axial direction 2 are sealed by the sealing devices 9 on both sides in the axial direction 2 so that foreign matter and the like enter the sealed space 6 and the grease filled in the sealed space 6 is exposed to the outside. Leakage to the ground is suppressed. Since the sealing devices 9 and 9 on both sides in the axial direction 2 have the same configuration as each other, one sealing device 9 will be described below as an example.

シール装置９は、図２（ａ）に示すように、内輪４及び外輪５のうちの一方の部材４に装着される第１シール部材１０と他方の部材５に装着される第２シール部材２０とを備えている。本実施形態では、一方の部材を内輪４とし、他方の部材を外輪５としている。
第１シール部材１０は、内輪４に嵌合される第１円筒部１２，１６と、第１円筒部１２，１６の軸２方向に間隔を空けた部位からそれぞれ径方向に突出するように設けられた第１円板部１７及び第２円板部１３と、を有している。第２シール部材２０は、外輪５に嵌合される第２円筒部２２，２６と、第２円筒部２２，２６から径方向に突出するように設けられ、かつ第１シール部材１０の第１円筒部１２，１６、第１円板部１７及び第２円板部１３によって区画された溝部３０に挿入される第３円板部２７と、を有している。また、第１円板部１７、第２円板部１３及び第３円板部２７のうちの少なくとも一つが弾性を有した円板部１７とされ、この円板部１７の弾性変形を伴って第３円板部２７が溝部３０に挿入可能とされている（図２（ｂ）参照）。また、シール装置９は、第１シール部材１０及び第２シール部材２０が内輪４及び外輪５に装着された状態で、内輪４及び外輪５間の被シール空間６と外部空間とを連通させるラビリンスシールを構成する軸方向に延びる複数の非接触シール部３１，３３，３５と径方向に延びる複数の非接触シール部３２，３４とが交互に形成される構成とされている。 As shown in FIG. 2A, the sealing device 9 includes a first seal member 10 attached to one member 4 of the inner ring 4 and the outer ring 5 and a second seal member 20 attached to the other member 5. It has and. In the present embodiment, one member is the inner ring 4 and the other member is the outer ring 5.
The first seal member 10 is provided so as to protrude in the radial direction from each of the first cylindrical portions 12 and 16 fitted into the inner ring 4 and the portions of the first cylindrical portions 12 and 16 spaced in the axial 2 direction. It has the 1st disc part 17 and the 2nd disc part 13 which were formed. The second seal member 20 is provided so as to protrude from the second cylindrical portions 22 and 26 fitted to the outer ring 5 and the second cylindrical portions 22 and 26 in the radial direction, and is the first seal member of the first seal member 10. It has a cylindrical portion 12, 16, a first disc portion 17, and a third disc portion 27 that is inserted into a groove portion 30 defined by the second disc portion 13. Further, at least one of the first disc part 17, the second disc part 13 and the third disc part 27 is a disc part 17 having elasticity, and the disc part 17 is elastically deformed. The third disk portion 27 can be inserted into the groove portion 30 (see FIG. 2B). In addition, the sealing device 9 is a labyrinth that communicates the sealed space 6 between the inner ring 4 and the outer ring 5 with the outer space in a state where the first seal member 10 and the second seal member 20 are attached to the inner ring 4 and the outer ring 5. A plurality of non-contact seal portions 31, 33, 35 forming the seal and extending in the axial direction and a plurality of non-contact seal portions 32, 34 extending in the radial direction are alternately formed.

本実施形態では、第１シール部材１０を、第１芯金１１に第１弾性部材１５を固着した構成とし、第２シール部材２０を、第２芯金２１に第２弾性部材２５を固着した構成としている。第１芯金１１及び第２芯金２１は、ステンレス鋼板や冷間圧延鋼板（ＳＰＣＣ）などの金属材から形成された金属製とされ、板金加工されたリング状とされている。
第１芯金１１は、内輪４の外周面４ｂに嵌合され、第１円筒部を構成する芯金円筒部１２と、この芯金円筒部１２の軸２方向一方側（被シール空間６側）端部に連なり、該端部から径方向外側に向けて突出するように環状に設けられ、第２円板部を構成する芯金円板部１３と、を備えている。 In the present embodiment, the first seal member 10 is configured such that the first elastic member 15 is fixed to the first core metal 11, the second seal member 20 is fixed to the second core metal 21, and the second elastic member 25 is fixed to the second core metal 21. It is configured. The first cored bar 11 and the second cored bar 21 are made of a metal material such as a stainless steel plate or a cold rolled steel plate (SPCC), and have a sheet-metal processed ring shape.
The first cored bar 11 is fitted to the outer peripheral surface 4b of the inner ring 4 and constitutes the first cylindrical part, and one side of the cored bar cylindrical part 12 in the axial 2 direction (the sealed space 6 side). ) A cored bar disc portion 13 which is connected to the end portion and is provided in an annular shape so as to project radially outward from the end portion and which constitutes a second disc portion.

芯金円板部１３は、軸２方向他方側（外部空間側）に向く面が溝部３０の溝幅方向（軸２方向と同方向）一方側の溝内壁面を構成する。
また、芯金円板部１３は、その周端部となる突出方向先端部が対向される部位としての外輪５の内周面５ｂに対向されて軸２方向に延びる非接触シール部としての第５非接触シール部３５を形成する構成とされている。この芯金円板部１３の径方向に沿う突出寸法は、第１シール部材１０が内輪４に装着された状態で、その先端部と外輪５の内周面５ｂとの間に僅かな隙間状のラビリンスシールを構成する第５非接触シール部３５が形成されるように適宜の寸法としてもよい。また、芯金円板部１３は、その先端部と外輪５の内周面５ｂとの間に全周に亘って略一様な第５非接触シール部３５が形成されるように構成されている。
なお、第１芯金１１を、全周に亘って略一様な断面形状とされたものとしてもよい。 The surface of the cored bar disc portion 13 facing the other side in the axial direction 2 (outer space side) constitutes the groove inner wall surface on one side in the groove width direction (the same direction as the axial direction 2) of the groove portion 30.
Further, the core metal disc portion 13 is a non-contact seal portion that extends in the axis 2 direction and faces the inner peripheral surface 5b of the outer ring 5 that is a portion where the tip end in the protruding direction that is the peripheral end portion thereof faces. 5 The non-contact seal portion 35 is formed. The projecting dimension along the radial direction of the cored bar disk portion 13 has a slight gap between the tip portion of the first seal member 10 mounted on the inner ring 4 and the inner peripheral surface 5b of the outer ring 5. The fifth non-contact seal portion 35 forming the labyrinth seal may be formed to have an appropriate size. Further, the cored bar disc portion 13 is configured such that a substantially non-uniform fifth non-contact seal portion 35 is formed over the entire circumference between the tip end portion thereof and the inner peripheral surface 5b of the outer ring 5. There is.
The first cored bar 11 may have a substantially uniform cross-sectional shape over the entire circumference.

第１弾性部材１５は、ＮＢＲ、Ｈ−ＮＢＲ、ＡＣＭ、ＡＥＭ、ＦＫＭ、シリコーンゴム等のゴム材（弾性材料）からなり、第１芯金１１に加硫成型等によって固着一体とされている。この第１弾性部材１５は、第１芯金１１の芯金円筒部１２の外周面を被覆するように設けられ、第１円筒部を構成する弾性円筒部１６と、この弾性円筒部１６の軸２方向他方側（外部空間側）端部に連なり、該端部から径方向外側に向けて突出するように環状に設けられ、第１円板部を構成する弾性円板部１７と、を備えている。本実施形態では、この第１円板部を構成する弾性円板部１７を、互いに軸２方向に移動させるようにして第１シール部材１０と第２シール部材２０とを組み合わせる際に、主として弾性変形する弾性を有した円板部としている。
また、第１弾性部材１５は、第１芯金１１の芯金円筒部１２の軸２方向他方側（外部空間側）端部を被覆するように設けられた外端被覆部１８を備えている。本実施形態では、弾性円板部１７を、この外端被覆部１８よりも軸２方向一方側（被シール空間６側）に位置するように設けた構成としている。
弾性円筒部１６は、芯金円板部１３と弾性円板部１７との間の外周面が溝部３０の溝底面を構成する。図例では、この弾性円筒部１６の弾性円板部１７よりも軸２方向他方側（外部空間側）部位の外周面を、溝部３０の溝底面よりも軸心側（径方向内側）に位置するように設けた例を示している。つまり、この弾性円筒部１６の弾性円板部１７よりも外部空間側部位の径方向に沿う厚さ寸法を、弾性円筒部１６の溝部３０の溝底面を構成する部位の径方向に沿う厚さ寸法よりも小とし、この外部空間側部位に連なるように外端被覆部１８を設けた構成としている。 The first elastic member 15 is made of a rubber material (elastic material) such as NBR, H-NBR, ACM, AEM, FKM, and silicone rubber, and is integrally fixed to the first core metal 11 by vulcanization molding or the like. The first elastic member 15 is provided so as to cover the outer peripheral surface of the cored bar cylindrical portion 12 of the first cored bar 11, and the elastic cylindrical section 16 that constitutes the first cylindrical section and the shaft of the elastic cylindrical section 16 are provided. An elastic disc portion 17 that is continuous with the other end (outside space side) in the two directions and that is annularly provided so as to project radially outward from the end and that constitutes the first disc portion. ing. In the present embodiment, when the elastic disc portion 17 constituting the first disc portion is moved in the axial 2 direction with respect to each other so as to combine the first seal member 10 and the second seal member 20, the elastic disc portion 17 is mainly elastic. The disk portion has elasticity to be deformed.
Further, the first elastic member 15 includes an outer end covering portion 18 provided so as to cover the other end (outer space side) of the cored bar cylindrical portion 12 of the first cored bar 11 in the axial direction 2. .. In the present embodiment, the elastic disc portion 17 is provided so as to be located on the one side in the axial 2 direction (the sealed space 6 side) with respect to the outer end covering portion 18.
In the elastic cylindrical portion 16, the outer peripheral surface between the metal core disc portion 13 and the elastic disc portion 17 constitutes the groove bottom surface of the groove portion 30. In the illustrated example, the outer peripheral surface of the elastic cylindrical portion 16 on the other side in the axial direction 2 (outer space side) with respect to the elastic disc portion 17 is positioned on the axial center side (radially inner side) of the groove bottom surface of the groove portion 30. The example shown in FIG. That is, the thickness dimension of the elastic cylinder portion 16 along the radial direction of the portion on the outer space side of the elastic disc portion 17 is the thickness of the portion of the groove portion 30 of the elastic cylinder portion 16 along the radial direction. The size is smaller than the size, and the outer end covering portion 18 is provided so as to be continuous with this external space side portion.

弾性円板部１７は、軸２方向一方側（被シール空間６側）に向く面が溝部３０の溝幅方向他方側の溝内壁面を構成する。この弾性円板部１７及び芯金円板部１３によって溝幅方向両側が区画され、弾性円筒部１６によって溝底が区画された溝部３０は、径方向外側に向けて開口し、かつ当該第１シール部材１０の全周に亘って設けられている。
また、本実施形態では、この弾性円板部１７の第１円筒部を構成する弾性円筒部１６からの径方向に沿う突出寸法Ｈを、芯金円板部１３の弾性円筒部１６からの突出寸法よりも小としている。つまり、弾性円板部１７の溝部３０の溝底面からの突出寸法Ｈを、芯金円板部１３の溝部３０の溝底面からの突出寸法よりも小としている。
また、弾性円板部１７は、その周端部となる突出方向先端部が対向される部位としての第２弾性部材２５の弾性基部２６の内周面に対向されて軸２方向に延びる非接触シール部としての第１非接触シール部３１を形成する構成とされている。この弾性円板部１７の突出寸法Ｈは、第１シール部材１０及び第２シール部材２０が内輪４及び外輪５に装着された状態で、その先端部と第２弾性部材２５の弾性基部２６の内周面との間に僅かな隙間状のラビリンスシールを構成する第１非接触シール部３１が形成されるように適宜の寸法としてもよい。また、弾性円板部１７は、その先端部と第２弾性部材２５の弾性基部２６の内周面との間に全周に亘って略一様な第１非接触シール部３１が形成されるように構成されている。本実施形態では、第１シール部材１０及び第２シール部材２０が内輪４及び外輪５に装着された状態で、この第１非接触シール部３１の径方向に沿う寸法と上記した第５非接触シール部３５の径方向に沿う寸法とが略同寸法となるように構成している。 A surface of the elastic disc portion 17 facing one side in the axial direction 2 (the sealed space 6 side) constitutes a groove inner wall surface on the other side of the groove portion 30 in the groove width direction. The elastic disk portion 17 and the core metal disk portion 13 define both sides in the groove width direction, and the groove portion 30 in which the elastic cylinder portion 16 defines the groove bottom is opened toward the outside in the radial direction. It is provided over the entire circumference of the seal member 10.
Further, in the present embodiment, the protrusion dimension H along the radial direction from the elastic cylindrical portion 16 forming the first cylindrical portion of the elastic disc portion 17 is set to the protrusion from the elastic cylindrical portion 16 of the core metal disc portion 13. It is smaller than the size. That is, the protruding dimension H of the elastic disk portion 17 from the groove bottom surface of the groove portion 30 is set to be smaller than the protruding dimension H of the core metal disk portion 13 from the groove bottom surface.
In addition, the elastic disc portion 17 is opposed to the inner peripheral surface of the elastic base portion 26 of the second elastic member 25, which is a portion where the tip end in the projecting direction, which is the peripheral end portion, opposes, and extends in the axial 2 direction in a non-contact manner. The first non-contact seal portion 31 as a seal portion is formed. The protruding dimension H of the elastic disc portion 17 is such that the tip end portion and the elastic base portion 26 of the second elastic member 25 are in a state where the first seal member 10 and the second seal member 20 are attached to the inner ring 4 and the outer ring 5. It may be of an appropriate size so that the first non-contact seal portion 31 forming a labyrinth seal with a slight clearance is formed between the inner peripheral surface and the inner peripheral surface. Further, the elastic disc portion 17 has a first non-contact seal portion 31 which is substantially uniform over the entire circumference between the tip of the elastic disc portion 17 and the inner peripheral surface of the elastic base portion 26 of the second elastic member 25. Is configured. In the present embodiment, with the first seal member 10 and the second seal member 20 mounted on the inner ring 4 and the outer ring 5, the dimension of the first non-contact seal portion 31 along the radial direction and the above-mentioned fifth non-contact state. The size of the seal portion 35 along the radial direction is substantially the same.

また、本実施形態では、弾性円板部１７を、周方向に見た断面形状が軸２方向中心線を対称軸とする線対称状となるように形成している。また、この弾性円板部１７を、周方向に見た断面形状が略方形状とされたものとしている。つまり、この弾性円板部１７は、軸２方向に傾斜状とされることなく、径方向外側に延びるように形成されている。
この弾性円板部１７の軸２方向に沿う厚さ寸法は、後記する第３非接触シール部３３の径方向に沿う寸法よりも小とされている。この弾性円板部１７の厚さ寸法は、弾性変形性やシール性、組み合わせ性、組み合わせ後の非分離性等の観点から適宜の寸法とされたものとしてもよい。また、図例では、この弾性円板部１７の厚さ寸法を、芯金円板部１３の軸２方向に沿う厚さ寸法と概ね同寸法とした例を示しているが、芯金円板部１３の厚さ寸法以下としてもよい。
なお、第１弾性部材１５を、全周に亘って略一様な断面形状とされたものとしてもよい。 Further, in the present embodiment, the elastic disc portion 17 is formed so that the cross-sectional shape viewed in the circumferential direction is line-symmetrical with the axis 2 direction center line as the axis of symmetry. Further, the elastic disc portion 17 has a substantially rectangular cross-section when viewed in the circumferential direction. That is, the elastic disc portion 17 is formed to extend radially outward without being inclined in the direction of the axis 2.
The thickness dimension of the elastic disc portion 17 along the axis 2 direction is smaller than the dimension of the third non-contact seal portion 33, which will be described later, along the radial direction. The thickness dimension of the elastic disc portion 17 may be set to an appropriate dimension from the viewpoint of elastic deformability, sealability, assemblability, non-separability after combination, and the like. Further, in the illustrated example, the thickness dimension of the elastic disc portion 17 is shown to be approximately the same as the thickness dimension of the core metal disc portion 13 along the axis 2 direction. The thickness may be less than or equal to the thickness of the portion 13.
Note that the first elastic member 15 may have a substantially uniform cross-sectional shape over the entire circumference.

第２芯金２１は、外輪５の内周面５ｂに嵌合され、第２円筒部を構成する芯金円筒部２２と、この芯金円筒部２２の軸２方向他方側（外部空間側）端部に連なり、該端部から径方向内側に向けて突出するように環状に設けられた芯金円板部２３と、を備えている。
芯金円板部２３は、軸２方向に見て、第１シール部材１０の芯金円板部１３の先端部と重なり合うように配される構成とされている。
また、芯金円板部２３は、第１シール部材１０及び第２シール部材２０が内輪４及び外輪５に装着された状態で、軸２方向他方側（外部空間側）に向く面が第１シール部材１０の外端被覆部１８の軸２方向他方側（外部空間側）に向く面と略同一平面状となるように配される構成とされている。
なお、第２芯金２１を、全周に亘って略一様な断面形状とされたものとしてもよい。 The second cored bar 21 is fitted to the inner peripheral surface 5b of the outer ring 5 and constitutes a second cylindrical part, and a cored bar cylindrical part 22 and the other side in the axial direction 2 of the cored bar cylindrical part 22 (outer space side). The metal core disc portion 23 is provided in an annular shape so as to be continuous with the end portion and project inward in the radial direction from the end portion.
The mandrel disc part 23 is arranged so as to overlap the tip end part of the mandrel disc part 13 of the first seal member 10 when viewed in the direction of the axis 2.
Further, the core metal disc portion 23 has a first surface facing the other side in the axial direction 2 (outer space side) in a state where the first seal member 10 and the second seal member 20 are attached to the inner ring 4 and the outer ring 5. The seal member 10 is arranged so as to be substantially flush with the surface of the outer end covering portion 18 of the seal member 10 facing the other side in the axial direction 2 (outer space side).
The second cored bar 21 may have a substantially uniform cross-sectional shape over the entire circumference.

第２弾性部材２５は、上記同様なゴム材からなり、第２芯金２１に加硫成型等によって固着一体とされている。この第２弾性部材２５は、第２芯金２１の芯金円筒部２２の内周面を被覆するように設けられ、第２円筒部を構成する弾性基部２６と、この弾性基部２６の軸２方向一方側（被シール空間６側）端部に連なり、該端部から径方向内側に向けて突出するように環状に設けられ、第３円板部を構成する弾性円板部２７と、を備えている。
また、第２弾性部材２５は、第２芯金２１の芯金円筒部２２の軸２方向一方側（被シール空間６側）端部を被覆するように設けられた内端被覆部２８を備えている。また、第２弾性部材２５は、第２芯金２１の芯金円板部２３の軸心側の端部を被覆するように設けられた軸心端被覆部２９を備えている。本実施形態では、弾性基部２６を、第２芯金２１の芯金円板部２３の軸２方向一方側（被シール空間６側）に向く面を被覆するように、かつ軸心端被覆部２９に連なるように設けた構成としている。また、弾性円板部２７よりも軸２方向他方側（外部空間側）の弾性基部２６の内周面と軸心端被覆部２９の内周面とを面一状に設けた構成としている。 The second elastic member 25 is made of a rubber material similar to the above, and is integrally fixed to the second core metal 21 by vulcanization molding or the like. The second elastic member 25 is provided so as to cover the inner peripheral surface of the cored bar cylindrical portion 22 of the second cored bar 21, and an elastic base portion 26 forming the second cylindrical portion and the shaft 2 of the elastic base portion 26. An elastic disc portion 27 which is continuous with the one end in the direction (on the side of the sealed space 6) and which is annularly provided so as to protrude inward in the radial direction from the end portion and which constitutes the third disc portion. I have it.
Further, the second elastic member 25 includes an inner end covering portion 28 provided so as to cover an end portion of the cored bar cylindrical portion 22 of the second cored bar 21 on one side in the axis 2 direction (sealed space 6 side). ing. Further, the second elastic member 25 includes an axial center end covering portion 29 provided so as to cover the axial center side end portion of the cored bar disc portion 23 of the second cored bar 21. In the present embodiment, the elastic base portion 26 covers the surface of the mandrel disc portion 23 of the second mandrel 21 that faces one side in the axis 2 direction (the sealed space 6 side), and the shaft end covering portion. It is configured so as to be connected to 29. Further, the inner peripheral surface of the elastic base portion 26 and the inner peripheral surface of the shaft center end covering portion 29 on the other side (outer space side) in the axial direction 2 with respect to the elastic disc portion 27 are provided so as to be flush with each other.

また、弾性円板部２７よりも軸２方向他方側（外部空間側）の弾性基部２６及び軸心端被覆部２９の内周面に、上記した第１シール部材１０の弾性円板部１７の先端部が対向される。
弾性円板部２７は、第１シール部材１０の溝部３０に挿入される構成とされている。本実施形態では、弾性円板部２７が溝部３０に挿入された状態で、弾性円板部２７の軸２方向両側と第１シール部材１０の弾性円板部１７及び芯金円板部１３とが対向されて径方向に延びる非接触シール部としての第２非接触シール部３２及び第４非接触シール部３４が形成される構成とされている。また、弾性円板部２７が溝部３０に挿入された状態で、弾性円板部２７の周端部となる突出方向先端部と第１シール部材１０の弾性円筒部１６とが対向されて軸２方向に延びる非接触シール部としての第３非接触シール部３３が形成される構成とされている。つまり、弾性円板部２７が溝部３０に挿入された状態で、この弾性円板部２７の軸２方向両側と溝部３０の溝幅方向両側の溝内壁面との間に径方向に延びる第２非接触シール部３２及び第４非接触シール部３４が形成され、弾性円板部２７の先端部と溝部３０の溝底面との間に軸２方向に延びる第３非接触シール部３３が形成される構成とされている。 Further, the elastic disc portion 17 of the first seal member 10 described above is provided on the inner peripheral surfaces of the elastic base portion 26 and the axial center end covering portion 29 on the other side (outer space side) in the axis 2 direction with respect to the elastic disc portion 27. The tips are opposed.
The elastic disc portion 27 is configured to be inserted into the groove portion 30 of the first seal member 10. In the present embodiment, in a state where the elastic disc portion 27 is inserted into the groove portion 30, both sides of the elastic disc portion 27 in the axial direction 2 and the elastic disc portion 17 and the core metal disc portion 13 of the first seal member 10 are connected. The second non-contact seal part 32 and the fourth non-contact seal part 34 are formed as non-contact seal parts that face each other and extend in the radial direction. Further, in a state where the elastic disc portion 27 is inserted into the groove portion 30, the tip end portion in the protruding direction which is the peripheral end portion of the elastic disc portion 27 and the elastic cylindrical portion 16 of the first seal member 10 are opposed to each other and the shaft 2 A third non-contact seal portion 33 is formed as a non-contact seal portion extending in the direction. That is, in a state in which the elastic disc portion 27 is inserted into the groove portion 30, the second portion extending in the radial direction between both sides of the elastic disc portion 27 in the axial 2 direction and groove inner wall surfaces on both sides of the groove portion 30 in the groove width direction. The non-contact seal portion 32 and the fourth non-contact seal portion 34 are formed, and the third non-contact seal portion 33 extending in the axial 2 direction is formed between the tip end portion of the elastic disc portion 27 and the groove bottom surface of the groove portion 30. It is configured to.

また、この弾性円板部２７の先端部と第１シール部材１０の弾性円板部１７の先端部とが軸２方向に見て互いに重なり合うように配される構成とされている。つまり、これら第１シール部材１０の弾性円板部１７及び第２シール部材２０の弾性円板部２７の先端部同士が軸２方向に見て互いに重なり合うように配される構成とされている。
また、弾性円板部２７の先端部と第１シール部材１０の弾性円板部１７及び芯金円板部１３とは、軸２方向に見て全周に亘って互いに重なり合うように配される構成とされている（図３参照）。本実施形態では、第２シール部材２０の弾性円板部２７並びに第１シール部材１０の弾性円板部１７及び芯金円板部１３を、全周に亘って略一様な断面形状とされたものとしている。つまり、軸２方向に見た状態における弾性円板部２７の先端部と第１シール部材１０の弾性円板部１７及び芯金円板部１３との径方向に沿う重なり幅寸法が全周に亘って略一様な寸法となるように構成している。 Further, the distal end portion of the elastic disc portion 27 and the distal end portion of the elastic disc portion 17 of the first seal member 10 are arranged so as to overlap each other when viewed in the axial 2 direction. That is, the tip ends of the elastic disc portion 17 of the first seal member 10 and the elastic disc portion 27 of the second seal member 20 are arranged so as to overlap each other when viewed in the axial 2 direction.
Further, the tip end portion of the elastic disc portion 27 and the elastic disc portion 17 and the core metal disc portion 13 of the first seal member 10 are arranged so as to overlap each other over the entire circumference when viewed in the axial 2 direction. It is configured (see FIG. 3). In the present embodiment, the elastic disc portion 27 of the second seal member 20 and the elastic disc portion 17 and the core disc portion 13 of the first seal member 10 have a substantially uniform cross-sectional shape over the entire circumference. I am supposed to. That is, the overlapping width dimension along the radial direction of the tip end portion of the elastic disc portion 27 and the elastic disc portion 17 of the first seal member 10 and the core metal disc portion 13 in the state viewed in the axis 2 direction is the entire circumference. It is configured to have a substantially uniform size over the entire length.

また、本実施形態では、弾性円板部２７は、互いに軸２方向に移動させるようにして第１シール部材１０と第２シール部材２０とを組み合わせる際に、第１シール部材１０の弾性円板部１７よりも弾性変形され難いように、第１シール部材１０の弾性円板部１７よりも剛性が大とされている。この弾性円板部２７は、図２（ｂ）に示すように、互いに軸２方向に移動させるようにして第１シール部材１０と第２シール部材２０とを組み合わせる際に、略変形しないような構成とされたものでもよい。図例では、この弾性円板部２７の軸２方向に沿う厚さ寸法Ｔを、第１シール部材１０の弾性円板部１７の軸２方向に沿う厚さ寸法の３倍程度の寸法とした例を示している。また、この弾性円板部２７を、周方向に見た断面形状が軸２方向中心線を対称軸とする線対称状となるように形成している。また、この弾性円板部２７を、周方向に見た断面形状が略方形状とされたものとしている。つまり、この弾性円板部２７は、軸２方向に傾斜状とされることなく、軸心側に延びるように形成されている。 Further, in this embodiment, when the elastic disc portion 27 is assembled with the first seal member 10 and the second seal member 20 so as to move in the axial 2 direction, the elastic disc portion of the first seal member 10 is moved. The rigidity is higher than that of the elastic disc portion 17 of the first seal member 10 so that it is less likely to be elastically deformed than the portion 17. As shown in FIG. 2B, the elastic disc portion 27 does not substantially deform when the first seal member 10 and the second seal member 20 are combined so as to move in the axial 2 direction. It may be configured. In the illustrated example, the thickness dimension T of the elastic disc portion 27 along the axis 2 direction is set to be about three times the thickness dimension of the elastic disc portion 17 of the first seal member 10 along the axis 2 direction. An example is shown. Further, the elastic disc portion 27 is formed so that the cross-sectional shape when viewed in the circumferential direction is line-symmetrical with the axis 2 direction center line as the axis of symmetry. Further, the elastic disc portion 27 has a substantially rectangular cross-sectional shape when viewed in the circumferential direction. That is, the elastic disc portion 27 is formed so as to extend toward the axial center without being inclined in the axis 2 direction.

また、この弾性円板部２７の厚さ寸法Ｔと第１シール部材１０の弾性円板部１７の突出寸法Ｈとを足し合わせた寸法を、溝部３０の溝幅寸法Ｗよりも小としている。つまり、図２（ｂ）に示すように、互いに軸２方向に移動させるようにして第１シール部材１０と第２シール部材２０とを組み合わせる際に、第２シール部材２０の弾性円板部２７によって倒伏されるように弾性変形する第１シール部材１０の弾性円板部１７の復元が可能なように、溝部３０の溝幅寸法Ｗを弾性円板部２７の厚さ寸法Ｔと第１シール部材１０の弾性円板部１７の突出寸法Ｈとを足し合わせた寸法よりも大としている。なお、本実施形態のように、弾性円板部２７を弾性材料から形成されたものとした場合には、互いに軸２方向に移動させるようにして第１シール部材１０と第２シール部材２０とを組み合わせた状態で、主として弾性変形する第１シール部材１０の弾性円板部１７が噛み込まれて倒伏した状態とならないように、弾性円板部２７の変形を考慮して各寸法Ｈ，Ｔ，Ｗを設定するようにしてもよい。 Further, the sum of the thickness dimension T of the elastic disc portion 27 and the protrusion dimension H of the elastic disc portion 17 of the first seal member 10 is set to be smaller than the groove width dimension W of the groove portion 30. That is, as shown in FIG. 2B, when the first seal member 10 and the second seal member 20 are combined so as to move in the axial 2 direction with respect to each other, the elastic disc portion 27 of the second seal member 20. The groove width dimension W of the groove portion 30 is set to the thickness dimension T of the elastic disc portion 27 and the first seal so that the elastic disc portion 17 of the first seal member 10 that is elastically deformed so as to fall down can be restored. It is set to be larger than the sum of the projection size H of the elastic disk portion 17 of the member 10 and the total size. When the elastic disc portion 27 is made of an elastic material as in the present embodiment, the first seal member 10 and the second seal member 20 are moved in the axial 2 direction with respect to each other. In the combined state, the respective dimensions H and T are taken into consideration in consideration of the deformation of the elastic disc portion 27 so that the elastic disc portion 17 of the first seal member 10 that is elastically deformed is not caught and fell. , W may be set.

また、この弾性円板部２７の厚さ寸法Ｔ及び弾性基部２６の内周面からの突出寸法は、第１シール部材１０及び第２シール部材２０が内輪４及び外輪５に装着された状態で、弾性円板部２７の軸２方向両側及び先端部と溝部３０の両溝内壁面及び溝底面との間に僅かな隙間状のラビリンスシールを構成する非接触シール部３２，３３，３４が形成されるように適宜の寸法としてもよい。また、弾性円板部２７は、第１シール部材１０の弾性円板部１７との間に全周に亘って略一様な第２非接触シール部３２が形成されるように構成されている。また、弾性円板部２７は、第１シール部材１０の弾性円筒部１６との間に全周に亘って略一様な第３非接触シール部３３が形成されるように構成されている。また、弾性円板部２７は、第１シール部材１０の芯金円板部１３との間に全周に亘って略一様な第４非接触シール部３４が形成されるように構成されている。また、この第４非接触シール部３４は、弾性円板部２７の径方向外側に連なるように設けられた弾性基部２６と芯金円板部１３との間にも連なるように形成される。 Further, the thickness T of the elastic disc portion 27 and the protrusion size of the elastic base portion 26 from the inner peripheral surface are in a state where the first seal member 10 and the second seal member 20 are attached to the inner ring 4 and the outer ring 5. The non-contact seal portions 32, 33, 34 forming a labyrinth seal having a slight gap are formed between both ends of the elastic disc portion 27 in the axial direction 2 and the tip portion and both groove inner wall surfaces and groove bottom surfaces of the groove portion 30. As described above, the size may be set appropriately. Further, the elastic disc portion 27 is configured such that the second non-contact seal portion 32, which is substantially uniform over the entire circumference, is formed between the elastic disc portion 27 and the elastic disc portion 17 of the first seal member 10. .. Further, the elastic disk portion 27 is configured such that a substantially uniform third non-contact seal portion 33 is formed over the entire circumference between the elastic disc portion 27 and the elastic cylindrical portion 16 of the first seal member 10. Further, the elastic disc portion 27 is configured such that a substantially uniform fourth non-contact seal portion 34 is formed over the entire circumference between the elastic disc portion 27 and the core metal disc portion 13 of the first seal member 10. There is. Further, the fourth non-contact seal portion 34 is also formed so as to be continuous between the elastic base portion 26 and the core metal disc portion 13, which are provided so as to be continuous with the elastic disc portion 27 in the radial direction.

上記構成とされた本実施形態に係るシール装置９は、第１シール部材１０及び第２シール部材２０が内輪４及び外輪５に装着されれば、外部空間と被シール空間６とを連通させるラビリンスシールが形成される。本実施形態では、第２非接触シール部３２の軸２方向に沿う寸法と第４非接触シール部３４の軸２方向に沿う寸法とが略同寸法となるように構成している。また、第３非接触シール部３３の径方向に沿う寸法と上記した第１非接触シール部３１及び第５非接触シール部３５の径方向に沿う寸法とが略同寸法となるように構成している。また、周方向に見て軸２方向に延びる第１非接触シール部３１、第３非接触シール部３３及び第５非接触シール部３５の径方向に沿う寸法と、周方向に見て径方向に延びる第２非接触シール部３２及び第４非接触シール部３４の軸２方向に沿う寸法と、が略同寸法となるように構成している。つまり、本実施形態では、周方向に見た状態におけるラビリンスシールの隙間寸法を、後記する凹部２６ａが設けられた箇所を除いて、外部空間から被シール空間６までの全体に亘って概ね一様な寸法としている。 In the sealing device 9 according to the present embodiment having the above-described configuration, if the first seal member 10 and the second seal member 20 are attached to the inner ring 4 and the outer ring 5, the labyrinth that allows the external space and the sealed space 6 to communicate with each other. A seal is formed. In the present embodiment, the dimension of the second non-contact seal portion 32 along the axis 2 direction and the dimension of the fourth non-contact seal portion 34 along the axis 2 direction are configured to be substantially the same. The dimension of the third non-contact seal portion 33 along the radial direction and the dimension of the first non-contact seal portion 31 and the fifth non-contact seal portion 35 along the radial direction are substantially the same. ing. Further, the dimensions of the first non-contact seal portion 31, the third non-contact seal portion 33, and the fifth non-contact seal portion 35 extending in the axial 2 direction when viewed in the circumferential direction and the radial direction when viewed in the circumferential direction. The second non-contact seal part 32 and the fourth non-contact seal part 34 extending in the direction of the axis 2 are configured to have substantially the same size. That is, in the present embodiment, the gap size of the labyrinth seal when viewed in the circumferential direction is substantially uniform over the entire space from the external space to the sealed space 6, except for the location where the recess 26a described later is provided. It has different dimensions.

また、ラビリンスシールの外部空間側の開口を構成する第１非接触シール部３１が、内輪４と外輪５との間の径方向略中央部において開口するように形成される。また、この第１非接触シール部３１の被シール空間６側に連なるように、かつ軸心側に向けて延びるように第２非接触シール部３２が形成される。また、この第２非接触シール部３２の軸心側に連なるように、かつ被シール空間６側に向けて延びるように第３非接触シール部３３が形成される。また、この第３非接触シール部３３の被シール空間６側に連なるように、かつ径方向外側に向けて延びるように第４非接触シール部３４が形成される。また、この第４非接触シール部３４の径方向外側に連なるように、かつ被シール空間６側に向けて延びるように第５非接触シール部３５が形成される。また、ラビリンスシールの被シール空間６側の開口を構成する第５非接触シール部３５が、外輪５の内周面５ｂに沿って開口するように形成される。 Further, the first non-contact seal portion 31 forming an opening on the outer space side of the labyrinth seal is formed so as to open at a substantially central portion in the radial direction between the inner ring 4 and the outer ring 5. Further, the second non-contact seal portion 32 is formed so as to be continuous with the sealed space 6 side of the first non-contact seal portion 31 and extend toward the axial center side. Further, the third non-contact seal portion 33 is formed so as to be continuous with the axial center side of the second non-contact seal portion 32 and extend toward the sealed space 6 side. Further, the fourth non-contact seal portion 34 is formed so as to be continuous with the sealed space 6 side of the third non-contact seal portion 33 and extend outward in the radial direction. Further, the fifth non-contact seal portion 35 is formed so as to be continuous to the outside in the radial direction of the fourth non-contact seal portion 34 and extend toward the sealed space 6 side. Further, a fifth non-contact seal portion 35 forming an opening on the sealed space 6 side of the labyrinth seal is formed so as to open along the inner peripheral surface 5b of the outer ring 5.

また、本実施形態では、第２弾性部材２５の弾性基部２６に、グリーストラップを構成する凹部２６ａを設けた構成としている。このような構成とすれば、凹部２６ａにおいてグリース溜まりを形成することができ、グリースの外部空間への漏洩を効果的に抑制することができる。
この凹部２６ａは、第１シール部材１０及び第２シール部材２０が内輪４及び外輪５に装着された状態で、軸２方向一方側（被シール空間６側）となる第１シール部材１０の芯金円板部１３の先端部位に向けて開口するように設けられている。また、この凹部２６ａは、周方向に延びる溝状に全周に亘って設けられたものとしてもよく、周方向に間隔を空けて設けられたものとしてもよい。また、この凹部２６ａは、軸２方向に見て弾性円板部２７と重なり合わないように設けられている。この凹部２６ａを設ける位置や、軸２方向に沿う深さ寸法、径方向に沿う幅寸法は、グリースの受け入れが可能なように、また、弾性円板部２７の弾性変形を抑制する観点等から適宜の位置や寸法としてもよい。また、この凹部２６ａよりも径方向外側となる内端被覆部２８の被シール空間６側に向く面を、弾性基部２６及びこれに連なるように設けられた弾性円板部２７の被シール空間６側に向く面と略同一平面状となるように設けた構成としている。図例では、内端被覆部２８の径方向外側の被シール空間６側の角部にＣ面取状の面取部を設けた構成としており、この面取部を除いた内端被覆部２８の被シール空間６側に向く面を、弾性基部２６及び弾性円板部２７の被シール空間６側に向く面と略同一平面状としている。
なお、第２弾性部材２５を、全周に亘って略一様な断面形状とされたものとしてもよい。 Further, in the present embodiment, the elastic base portion 26 of the second elastic member 25 is provided with the concave portion 26a forming the grease trap. With such a configuration, a grease reservoir can be formed in the recess 26a, and the leakage of grease to the external space can be effectively suppressed.
The recess 26a is the core of the first seal member 10 that is one side in the axial direction 2 (sealed space 6 side) when the first seal member 10 and the second seal member 20 are mounted on the inner ring 4 and the outer ring 5. It is provided so as to open toward the tip portion of the gold disc portion 13. Further, the recesses 26a may be provided in a groove shape extending in the circumferential direction over the entire circumference, or may be provided at intervals in the circumferential direction. The recess 26a is provided so as not to overlap with the elastic disc portion 27 when viewed in the direction of the axis 2. The position where the recess 26a is provided, the depth dimension along the axis 2 direction, and the width dimension along the radial direction are such that grease can be received, and from the viewpoint of suppressing elastic deformation of the elastic disc portion 27, and the like. It may be an appropriate position or size. In addition, the surface of the inner end covering portion 28, which is radially outward of the recess 26a, facing the sealed space 6 side, has the elastic base portion 26 and the sealed space 6 of the elastic disk portion 27 provided so as to be continuous with the elastic base portion 26. The structure is provided so as to be substantially flush with the surface facing the side. In the illustrated example, a C-chamfered chamfer is provided at a corner on the radially outer side of the inner end covering 28 on the sealed space 6 side, and the inner end covering 28 excluding the chamfer is formed. The surface of the elastic base portion 26 and the elastic disc portion 27 facing the sealed space 6 side is substantially flush with the surface of the elastic base portion 26 and the elastic disk portion 27 facing the sealed space 6 side.
The second elastic member 25 may have a substantially uniform cross-sectional shape over the entire circumference.

本実施形態に係るシール装置９及びこれを備えた軸受装置１は、上述のような構成としたことで、軸受装置１のトルクの低減が可能で、シール性の向上が可能でありながらも、第１シール部材１０と第２シール部材２０とを簡易に組み合わせ状態に維持することができる。
つまり、第１シール部材１０に、第１円筒部１２，１６の軸２方向に間隔を空けた部位からそれぞれ径方向（本実施形態では、径方向外側）に突出するように第１円板部（弾性円板部）１７及び第２円板部（芯金円板部）１３を設けた構成としている。また、第２シール部材２０に、第２円筒部２２，２６から径方向（本実施形態では、径方向内側）に突出するように第３円板部（弾性円板部）２７を設けた構成としている。また、これら弾性円板部１７、芯金円板部１３及び弾性円板部２７のうちの少なくとも一つを、弾性を有した円板部（弾性円板部）１７とし、この弾性円板部１７の弾性変形を伴って弾性円板部２７が、第１シール部材１０の溝部３０に挿入可能とされている。従って、第１シール部材１０と第２シール部材２０とを相対的に軸２方向に沿う方向に移動させれば、第１シール部材１０の弾性円板部１７の弾性変形を伴って第２シール部材２０の弾性円板部２７を溝部３０に挿入させることができる。これにより、第１シール部材１０の弾性円板部１７と芯金円板部１３とによって第２シール部材２０の弾性円板部２７が挟まれるように保持され、第１シール部材１０と第２シール部材２０とを組み合わせた状態に維持することができ、取扱性及び軸受装置１への組付性を向上させることができる。また、組み合わせた状態で他の部材によって覆う必要があるものや加締め等の必要があるものと比べて、第１シール部材１０と第２シール部材２０とを簡易に組み合わせ状態に維持することができる。 The seal device 9 and the bearing device 1 including the seal device 9 according to the present embodiment are configured as described above, so that the torque of the bearing device 1 can be reduced and the sealability can be improved. The first seal member 10 and the second seal member 20 can be easily maintained in the combined state.
In other words, the first disc member 10 protrudes in the radial direction (radially outward in the present embodiment) from the portions of the first cylindrical member 12, 16 that are spaced apart in the axial 2 direction. (Elastic disc portion) 17 and second disc portion (core disc portion) 13 are provided. Further, the second seal member 20 is provided with a third disk portion (elastic disk portion) 27 so as to project from the second cylindrical portions 22 and 26 in the radial direction (in the present embodiment, the radial inner side). I am trying. At least one of the elastic disc portion 17, the core metal disc portion 13 and the elastic disc portion 27 is an elastic disc portion (elastic disc portion) 17, and the elastic disc portion The elastic disc portion 27 can be inserted into the groove portion 30 of the first seal member 10 with the elastic deformation of 17. Therefore, when the first seal member 10 and the second seal member 20 are relatively moved in the direction along the axis 2 direction, the second seal is accompanied by elastic deformation of the elastic disc portion 17 of the first seal member 10. The elastic disc portion 27 of the member 20 can be inserted into the groove portion 30. As a result, the elastic disc portion 27 of the second seal member 20 is held so as to be sandwiched between the elastic disc portion 17 of the first seal member 10 and the core disc portion 13, and the first seal member 10 and the second seal member 10 are retained. It is possible to maintain the combined state with the seal member 20, and it is possible to improve the handleability and the assemblability to the bearing device 1. Further, the first seal member 10 and the second seal member 20 can be easily maintained in the combined state as compared with the combined state in which it is necessary to cover with another member or the case where caulking or the like is required. it can.

また、これら第１シール部材１０及び第２シール部材２０が内側部材（内輪）４及び外側部材（外輪）５に装着された状態で、内輪４及び外輪５間の被シール空間６と外部空間とを連通させるラビリンスシールを構成する軸方向に延びる複数の非接触シール部３１，３３，３５と径方向に延びる複数の非接触シール部３２，３４とが交互に形成される構成としている。従って、これら第１シール部材１０及び第２シール部材２０によって非接触型シールを構成することができるので、弾性的に接触するシールリップを有したものと比べて、軸受装置１のトルクを低減することができ、また、摩耗等による劣化が生じ難くなるので、耐用寿命の長期化を図ることができる。また、軸２方向に延びる少なくとも２つの非接触シール部３１，３３，３５と径方向に延びる少なくとも２つの非接触シール部３２，３４とが交互に形成されることとなるので、比較的に複雑な経路のラビリンスシールを構成することができ、シール性能を向上させることができる。これにより、軸受装置１の被シール空間６に充填されたグリースの外部空間への漏洩を抑制することができ、また、外部空間から軸受装置１の被シール空間６への塵埃等の異物の侵入を抑制することができる。 Further, with the first seal member 10 and the second seal member 20 mounted on the inner member (inner ring) 4 and the outer member (outer ring) 5, the sealed space 6 between the inner ring 4 and the outer ring 5 and the outer space A plurality of non-contact seal portions 31, 33, 35 extending in the axial direction and a plurality of non-contact seal portions 32, 34 extending in the radial direction, which form a labyrinth seal that communicates with each other, are alternately formed. Therefore, since the non-contact type seal can be configured by the first seal member 10 and the second seal member 20, the torque of the bearing device 1 is reduced as compared with a seal lip that elastically contacts. Moreover, since deterioration due to wear or the like is less likely to occur, the useful life can be extended. Further, at least two non-contact seal portions 31, 33, 35 extending in the axial 2 direction and at least two non-contact seal portions 32, 34 extending in the radial direction are alternately formed, which is relatively complicated. A labyrinth seal having a different path can be configured, and the sealing performance can be improved. As a result, the grease filled in the sealed space 6 of the bearing device 1 can be prevented from leaking to the external space, and foreign matter such as dust enters the sealed space 6 of the bearing device 1 from the external space. Can be suppressed.

また、本実施形態では、第２シール部材２０の弾性円板部２７が溝部３０に挿入された状態で、この弾性円板部２７の軸方向両側と第１シール部材１０の弾性円板部１７及び芯金円板部１３とが対向されて径方向に延びる非接触シール部３２，３４が形成され、この弾性円板部２７の先端部と第１円筒部１２，１６とが対向されて軸２方向に延びる非接触シール部３３が形成される構成としている。従って、第１シール部材１０の溝部３０の溝幅方向両溝内壁面及び溝底面と弾性円板部２７の軸方向両側面及び先端面とがそれぞれ対向されて径方向に延びる２つの非接触シール部３２，３４と軸方向に延びる１つの非接触シール部３３とを形成することができる。 Further, in the present embodiment, with the elastic disc portion 27 of the second seal member 20 inserted in the groove portion 30, both sides in the axial direction of the elastic disc portion 27 and the elastic disc portion 17 of the first seal member 10 are provided. And non-contact seal portions 32 and 34 extending in the radial direction are formed so as to face the core metal disc portion 13 and the tip end portion of the elastic disc portion 27 and the first cylindrical portions 12 and 16 face each other and the shaft is provided. The non-contact seal portion 33 extending in two directions is formed. Therefore, two non-contact seals extending in the radial direction in which the inner wall surfaces and the bottom surface of the groove of the groove portion 30 of the first seal member 10 are opposed to the axial both side surfaces and the tip end surface of the elastic disk portion 27, respectively. The parts 32, 34 and one non-contact seal part 33 extending in the axial direction can be formed.

また、本実施形態では、弾性円板部１７の先端部及び芯金円板部１３の先端部とこれらが対向される部位としての弾性基部２６の内周面及び外輪５の内周面５ｂとが対向されて軸２方向に延びる非接触シール部３１，３５が形成される構成としている。従って、外部空間側及び被シール空間６側のうちの一方側に配されることとなる芯金円板部１３の先端部とこれが対向される外輪５の内周面５ｂとが対向されて軸２方向に延びる非接触シール部３５が形成される。また、外部空間側及び被シール空間６側のうちの他方側に配されることとなる弾性円板部１７の先端部とこれが対向される弾性基部２６の内周面とが対向されて軸２方向に延びる非接触シール部３１が形成される。つまり、被シール空間６と外部空間とを連通させるラビリンスシールの被シール空間６側及び外部空間側のそれぞれに非接触シール部３１，３５が形成されることとなる。これにより、軸受装置１の被シール空間６に充填されたグリースの外部空間への漏洩をより効果的に抑制することができ、また、外部空間から軸受装置１の被シール空間６への塵埃等の侵入をより効果的に抑制することができる。 In addition, in the present embodiment, the distal end portion of the elastic disc portion 17 and the distal end portion of the core metal disc portion 13, and the inner peripheral surface of the elastic base portion 26 and the inner peripheral surface 5b of the outer ring 5 as the portions where these are opposed to each other. Are formed so as to face each other and form non-contact seal portions 31 and 35 extending in the axis 2 direction. Therefore, the tip end portion of the cored bar disc portion 13 to be arranged on one of the outer space side and the sealed space 6 side is opposed to the inner peripheral surface 5b of the outer ring 5 which opposes the shaft portion. A non-contact seal part 35 extending in two directions is formed. Further, the tip end portion of the elastic disc portion 17 to be arranged on the other side of the outer space side and the sealed space 6 side and the inner peripheral surface of the elastic base portion 26 which opposes this end portion are opposed to each other and the shaft 2 is provided. A non-contact seal portion 31 extending in the direction is formed. That is, the non-contact seal portions 31 and 35 are formed on the sealed space 6 side and the external space side of the labyrinth seal that connect the sealed space 6 and the external space. As a result, the grease filled in the sealed space 6 of the bearing device 1 can be more effectively suppressed from leaking to the external space, and dust and the like from the external space to the sealed space 6 of the bearing device 1 can be suppressed. Can be suppressed more effectively.

また、本実施形態では、第１シール部材１０の弾性円板部１７の第１円筒部１２，１６からの突出寸法Ｈを、芯金円板部１３の第１円筒部１２，１６からの突出寸法よりも小としている。また、この弾性円板部１７及び第２シール部材２０の弾性円板部２７のうちの少なくとも一つを、弾性を有した円板部１７とし、弾性円板部１７の先端部と弾性円板部２７の先端部とが軸２方向に見て互いに重なり合うように配される構成としている。従って、突出寸法Ｈが小とされた弾性円板部１７側から弾性円板部２７を相対的に軸方向に移動させることで、弾性円板部１７及び弾性円板部２７の両方または一方の弾性変形を伴って第２シール部材２０の弾性円板部２７を溝部３０に容易に挿入させることができる。 Further, in this embodiment, the protrusion dimension H of the elastic disc portion 17 of the first seal member 10 from the first cylindrical portions 12 and 16 is set to be the protrusion dimension H of the core metal disc portion 13 from the first cylindrical portions 12 and 16. It is smaller than the size. Further, at least one of the elastic disc portion 17 and the elastic disc portion 27 of the second seal member 20 is a disc portion 17 having elasticity, and the tip end portion of the elastic disc portion 17 and the elastic disc portion The distal end of the portion 27 is arranged so as to overlap with each other when viewed in the axis 2 direction. Therefore, by moving the elastic disc portion 27 relatively in the axial direction from the side of the elastic disc portion 17 having the small protruding dimension H, both or one of the elastic disc portion 17 and the elastic disc portion 27 is moved. The elastic disc portion 27 of the second seal member 20 can be easily inserted into the groove portion 30 with elastic deformation.

また、本実施形態では、第２シール部材２０の弾性円板部２７の先端部と第１シール部材１０の弾性円板部１７及び芯金円板部１３とを、軸２方向に見て全周に亘って互いに重なり合うように配される構成としている。従って、これら弾性円板部１７、芯金円板部１３及び弾性円板部２７のうちの少なくとも一つの先端部に切欠状の凹部を設けて互いに重なり合わない箇所を設けたようなものと比べて、シール性を効果的に向上させることができる。 In addition, in the present embodiment, the distal end portion of the elastic disc portion 27 of the second seal member 20, the elastic disc portion 17 and the core disc portion 13 of the first seal member 10 are all viewed in the axial 2 direction. It is arranged so as to overlap each other over the circumference. Therefore, as compared with a case where a cutout-shaped concave portion is provided at a tip end portion of at least one of the elastic disk portion 17, the core metal disk portion 13 and the elastic disk portion 27 to provide a portion which does not overlap each other. Thus, the sealing property can be effectively improved.

また、本実施形態では、第１シール部材１０の弾性円板部１７を、弾性を有した円板部１７とし、溝部３０の軸２方向に沿う溝幅寸法Ｗを、この弾性円板部１７の第１円筒部１２，１６からの突出寸法Ｈと第２シール部材２０の弾性円板部２７の軸２方向に沿う厚さ寸法Ｔとを足し合わせた寸法よりも大としている。従って、第１シール部材１０と第２シール部材２０とを相対的に軸方向に沿う方向に移動させて弾性円板部１７の弾性変形を伴って弾性円板部２７を溝部３０に挿入させて組み合わせた際に、弾性円板部１７が倒伏された状態となることを抑制することができる。つまり、第１シール部材１０と第２シール部材２０とを相対的に軸２方向に沿う方向に移動させれば、弾性円板部１７が弾性円板部２７に押さえ付けられるようにして倒伏された状態となるが、弾性円板部２７を芯金円板部１３に近接または当接させれば、弾性円板部２７が弾性円板部１７を乗り越えた状態となり、弾性円板部１７の復元が可能となる。 Further, in the present embodiment, the elastic disc portion 17 of the first seal member 10 is the elastic disc portion 17, and the groove width dimension W of the groove portion 30 along the axis 2 direction is the elastic disc portion 17. Is larger than the sum of the dimension H of the protrusion from the first cylindrical portions 12 and 16 and the thickness T of the elastic disc portion 27 of the second seal member 20 along the axis 2 direction. Therefore, the first seal member 10 and the second seal member 20 are relatively moved in the axial direction so that the elastic disc portion 27 is inserted into the groove portion 30 with the elastic deformation of the elastic disc portion 17. It is possible to prevent the elastic disc portion 17 from falling down when combined. That is, when the first seal member 10 and the second seal member 20 are relatively moved in the direction along the axis 2 direction, the elastic disc portion 17 is pressed down by the elastic disc portion 27 and is laid down. However, if the elastic disc portion 27 is brought close to or in contact with the cored disc portion 13, the elastic disc portion 27 will pass over the elastic disc portion 17 and the elastic disc portion 17 Restore is possible.

また、本実施形態では、弾性を有した円板部（弾性円板部）１７を、周方向に見た断面形状が軸方向中心線を対称軸とする線対称状となるように形成している。例えば、弾性を有した円板部１７を、軸２方向一方に傾斜したリップ状の形状としたり、軸２方向一方側に凹部や凸部が設けられた形状としたりした場合において、この円板部１７を有した部材（第１シール部材）１０が回転側となる部材に装着される場合には、この円板部１７が遠心力によって倒れるように変形したり、起き上がるように変形したりするようなことが考えられ、これにより、この円板部１７が対向する部位２６，２７に接触してしまうようなことが考えられる。上記構成によれば、弾性を有した円板部１７が回転側となる部材に設けられる場合にも、遠心力よる変形を抑制することができ、この円板部１７とこれが対向する部位２６，２７との非接触シール部３１，３２を確保することができる。 Further, in the present embodiment, the elastic disc portion (elastic disc portion) 17 is formed so that the cross-sectional shape viewed in the circumferential direction is line-symmetrical with the axial center line as the axis of symmetry. There is. For example, when the elastic disc portion 17 is formed into a lip shape inclined to one side in the axial 2 direction or a shape in which a concave portion or a convex portion is provided on one side in the axial 2 direction, the circular disc portion When the member (first seal member) 10 having the portion 17 is attached to the member on the rotating side, the disc portion 17 is deformed so as to be tilted by the centrifugal force or deformed so as to rise. It is conceivable that this causes the disc portion 17 to come into contact with the opposing portions 26 and 27. According to the above configuration, even when the elastic disc portion 17 is provided on the member on the rotation side, the deformation due to the centrifugal force can be suppressed, and the disc portion 17 and the portion 26 facing the disc portion 17, It is possible to secure the non-contact seal portions 31, 32 with 27.

次に、本発明に係るシール装置の他の実施の形態について、図面を参照しながら説明する。
図４は、第２実施形態に係るシール装置の一例を模式的に示す図である。
なお、上記第１実施形態との相違点について主に説明し、同様の構成については、同一符号を付し、その説明を省略または簡略に説明する。
また、本実施形態に係るシール装置９Ａも、上記同様、相対的に同軸回転する内側部材としての内輪４及び外側部材としての外輪５で構成される軸受装置１に装着され、軸受装置１を構成する。 Next, another embodiment of the sealing device according to the present invention will be described with reference to the drawings.
FIG. 4 is a diagram schematically showing an example of the sealing device according to the second embodiment.
The differences from the first embodiment will be mainly described, and the same reference numerals will be given to the same configurations, and the description thereof will be omitted or briefly described.
In addition, the sealing device 9A according to the present embodiment is also mounted on the bearing device 1 configured by the inner ring 4 as the inner member and the outer ring 5 as the outer member, which relatively rotate coaxially, as in the above, to configure the bearing device 1. To do.

本実施形態に係るシール装置９Ａは、第２シール部材２０Ａの第２弾性部材２５Ａの構成が上記第１実施形態とは主に異なる。
本実施形態では、第２弾性部材２５Ａの弾性基部２６Ａに、凹部２６ａを設けていない構成としている。つまり、本実施形態では、第２シール部材２０Ａの弾性円板部２７、弾性基部２６Ａ及び内端被覆部２８の被シール空間６側に向く面を、上記した内端被覆部２８の面取部を除いて面一状としている。
上記構成とされた本実施形態に係るシール装置９Ａ及びこれを備えた軸受装置１においても、上記した第１実施形態と概ね同様の効果を奏する。 The seal device 9A according to the present embodiment is mainly different from the first embodiment in the configuration of the second elastic member 25A of the second seal member 20A.
In the present embodiment, the elastic base portion 26A of the second elastic member 25A is not provided with the recess 26a. That is, in the present embodiment, the surfaces of the elastic disc portion 27, the elastic base portion 26A, and the inner end covering portion 28 of the second seal member 20A facing the sealed space 6 side are chamfered portions of the inner end covering portion 28 described above. It is made flush with the exception of.
Also in the sealing device 9A according to the present embodiment having the above-described configuration and the bearing device 1 including the sealing device 9A, substantially the same effects as the above-described first embodiment are achieved.

次に、本発明に係るシール装置の更に他の実施の形態について、図面を参照しながら説明する。
図５は、第３実施形態に係るシール装置の一例を模式的に示す図である。
なお、上記各実施形態との相違点について主に説明し、同様の構成については、同一符号を付し、その説明を省略または簡略に説明する。
また、本実施形態に係るシール装置９Ｂも、上記同様、相対的に同軸回転する内側部材としての内輪４及び外側部材としての外輪５で構成される軸受装置１に装着され、軸受装置１を構成する。 Next, still another embodiment of the sealing device according to the present invention will be described with reference to the drawings.
FIG. 5: is a figure which shows typically an example of the sealing device which concerns on 3rd Embodiment.
The differences from the above-described embodiments will be mainly described, and the same configurations will be denoted by the same reference numerals, and the description thereof will be omitted or briefly described.
In addition, the sealing device 9B according to the present embodiment is also mounted on the bearing device 1 configured by the inner ring 4 as the inner member and the outer ring 5 as the outer member, which relatively rotate coaxially, in the same manner as described above, and configures the bearing device 1. To do.

本実施形態に係るシール装置９Ｂは、第１シール部材１０Ａを、外輪５に装着されるものとし、第２シール部材２０Ｂを、内輪４に装着されるものとしている。つまり、本実施形態では、上記各実施形態とは異なり、第１シール部材１０Ａが装着される一方の部材を外輪５とし、第２シール部材２０Ｂが装着される他方の部材を内輪４としている。
第１シール部材１０Ａは、上記同様の金属材から形成された第１芯金１１Ａに、上記同様の弾性材料から形成された第１弾性部材１５Ａを固着した構成とされている。第２シール部材２０Ｂは、上記同様の金属材から形成された第２芯金２１Ａに、上記同様の弾性材料から形成された第２弾性部材２５Ｂを固着した構成とされている。
第１芯金１１Ａは、外輪５の内周面５ｂに嵌合され、第１円筒部を構成する芯金円筒部１２Ａと、この芯金円筒部１２Ａの外部空間側端部に連なり、該端部から軸心側に向けて突出するように環状に設けられた芯金円板部１３Ａと、を備えている。 In the sealing device 9B according to the present embodiment, the first seal member 10A is attached to the outer ring 5 and the second seal member 20B is attached to the inner ring 4. That is, in the present embodiment, unlike the above embodiments, one member to which the first seal member 10A is attached is the outer ring 5 and the other member to which the second seal member 20B is attached is the inner ring 4.
The first seal member 10A has a structure in which a first elastic member 15A formed of an elastic material similar to the above is fixed to a first core metal 11A formed of a metal material similar to the above. The second seal member 20B is configured such that a second core member 21A made of the same metal material as described above is fixed to a second elastic member 25B made of the same elastic material as described above.
The first cored bar 11A is fitted to the inner peripheral surface 5b of the outer ring 5 and is continuous with the cored bar cylindrical portion 12A forming the first cylindrical part and the end portion of the cored bar cylindrical part 12A on the external space side. And a metal core disc portion 13A provided in an annular shape so as to protrude from the portion toward the axial center side.

第１弾性部材１５Ａは、第１芯金１１Ａの芯金円筒部１２Ａの内周面を被覆するように設けられ、第１円筒部を構成する弾性円筒部１６Ａと、この弾性円筒部１６Ａの被シール空間６側端部に連なり、該端部から軸心側に向けて突出するように環状に設けられ、第１円板部を構成する弾性円板部１７Ａと、を備えている。この弾性円板部１７Ａは、上記同様、互いに軸２方向に移動させるようにして第１シール部材１０Ａと第２シール部材２０Ｂとを組み合わせる際に、主として弾性変形する弾性を有した円板部を構成する（図５（ｂ）参照）。また、第１弾性部材１５Ａは、第１芯金１１Ａの芯金円筒部１２Ａの被シール空間６側端部を被覆するように設けられた内端被覆部１８Ａを備えている。また、弾性円板部１７Ａを、この内端被覆部１８Ａよりも外部空間側に位置するように設けた構成としている。また、弾性円筒部１６Ａの弾性円板部１７Ａよりも被シール空間６側部位の径方向に沿う厚さ寸法を、弾性円筒部１６Ａの溝部３０の溝底面を構成する部位の径方向に沿う厚さ寸法よりも小とし、この被シール空間６側部位に連なるように内端被覆部１８Ａを設けた構成としている。また、溝部３０の溝底面を構成する弾性円筒部１６Ａの内周面を、径方向で芯金円板部１３Ａの先端面と略一致する位置となるように設けた構成としている。 The first elastic member 15A is provided so as to cover the inner peripheral surface of the cored bar cylindrical section 12A of the first cored bar 11A, and the elastic cylindrical section 16A that constitutes the first cylindrical section and the elastic cylindrical section 16A covered by the elastic cylindrical section 16A. An elastic disk portion 17A that is continuous with the end portion on the side of the seal space 6 and that is annularly provided so as to project from the end portion toward the axial center side and that constitutes a first disk portion is provided. Similar to the above, the elastic disc portion 17A is a disc portion having elasticity which is mainly elastically deformed when the first seal member 10A and the second seal member 20B are combined so as to move in the axial 2 direction. Configure (see FIG. 5B). Further, the first elastic member 15A includes an inner end covering portion 18A provided so as to cover an end portion of the cored bar cylindrical portion 12A of the first cored bar 11A on the sealed space 6 side. Further, the elastic disc portion 17A is provided so as to be located closer to the external space than the inner end covering portion 18A. Further, the thickness dimension of the elastic cylindrical portion 16A along the radial direction of the sealed space 6 side of the elastic disk portion 17A is the radial thickness of the portion forming the groove bottom surface of the groove portion 30 of the elastic cylindrical portion 16A. The inner end covering portion 18A is provided so as to be continuous with the sealed space 6 side portion. Further, the inner peripheral surface of the elastic cylindrical portion 16A forming the groove bottom surface of the groove portion 30 is provided so as to be substantially in the radial direction at a position substantially coincident with the tip end surface of the cored bar disc portion 13A.

また、弾性円板部１７Ａは、その周端部となる突出方向先端部が対向される部位としての第２弾性部材２５Ｂの外周面に対向されて軸２方向に延び、被シール空間６側において開口する非接触シール部としての第５非接触シール部３５を形成する構成とされている。この弾性円板部１７Ａの突出寸法Ｈは、上記と概ね同様、第１シール部材１０Ａ及び第２シール部材２０Ｂが外輪５及び内輪４に装着された状態で、その先端部と第２弾性部材２５Ｂの外周面との間に第５非接触シール部３５が形成されるように適宜の寸法としてもよい。
また、本実施形態では、第１弾性部材１５Ａに、弾性円筒部１６Ａの外部空間側端部に連なり、該端部から軸心側に向けて突出するように環状に設けられ、第２円板部を構成する弾性円板部１９を設けた構成としている。つまり、本実施形態では、第１シール部材１０Ａの第１円板部及び第２円板部を構成する弾性円板部１７Ａ及び弾性円板部１９の両方を、弾性材料から形成されたものとしている。 Further, the elastic disc portion 17A extends in the axial 2 direction while facing the outer peripheral surface of the second elastic member 25B, which is a portion where the tip end in the protruding direction which is the peripheral end portion thereof, faces the sealed space 6 side. The fifth non-contact seal portion 35 is formed as a non-contact seal portion that opens. The projecting dimension H of the elastic disc portion 17A is substantially the same as the above, in the state where the first seal member 10A and the second seal member 20B are attached to the outer ring 5 and the inner ring 4, the tip end portion and the second elastic member 25B. It may have an appropriate size so that the fifth non-contact seal portion 35 is formed between the outer peripheral surface and the outer peripheral surface.
Further, in the present embodiment, the first elastic member 15A is provided in an annular shape so as to be continuous with the end portion of the elastic cylindrical portion 16A on the external space side and project from the end portion toward the axial center side. The elastic disk portion 19 that constitutes the portion is provided. That is, in the present embodiment, both the elastic disc portion 17A and the elastic disc portion 19 which form the first disc portion and the second disc portion of the first seal member 10A are formed of the elastic material. There is.

この弾性円板部１９は、第１芯金１１Ａの芯金円板部１３Ａの先端部を被覆するように、かつ芯金円板部１３Ａの先端部から軸心側に向けて延びるように設けられている。つまり、本実施形態では、第１芯金１１Ａの芯金円板部１３Ａの先端部と対向する部位とによって非接触シール部を構成する態様に代えて、この弾性円板部１９の先端部とこれが対向される部位としての第２円筒部を構成する芯金円筒部２２Ａとによって軸２方向に延び、外部空間側において開口する非接触シール部としての第１非接触シール部３１を形成する構成とされている。この弾性円板部１９の突出寸法は、第１シール部材１０Ａ及び第２シール部材２０Ｂが外輪５及び内輪４に装着された状態で、その先端部と芯金円筒部２２Ａの外周面との間に第１非接触シール部３１が形成されるように適宜の寸法としてもよい。
また、この弾性円板部１９を、周方向に見た断面形状が軸２方向中心線を対称軸とする線対称状となるように形成している。また、この弾性円板部１９を、周方向に見た断面形状が略方形状とされたものとしている。つまり、この弾性円板部１９は、軸２方向に傾斜状とされることなく、軸心側に延びるように形成されている。 The elastic disc portion 19 is provided so as to cover the tip portion of the core metal disc portion 13A of the first core metal 11A and extend from the tip portion of the core metal disc portion 13A toward the axial center side. Has been. That is, in the present embodiment, instead of the aspect in which the non-contact seal portion is configured by the portion facing the tip portion of the core metal disc portion 13A of the first core metal 11A, the tip portion of this elastic disc portion 19 A configuration in which the first non-contact seal portion 31 as a non-contact seal portion that extends in the axis 2 direction and is open on the external space side is formed by the cored bar cylindrical portion 22A that constitutes the second cylindrical portion that faces this. It is said that. The projecting dimension of the elastic disc portion 19 is between the tip of the first seal member 10A and the second seal member 20B mounted on the outer ring 5 and the inner ring 4 and the outer peripheral surface of the cored bar cylindrical portion 22A. It may have an appropriate size so that the first non-contact seal portion 31 is formed.
Further, the elastic disc portion 19 is formed so that the cross-sectional shape viewed in the circumferential direction is line-symmetrical with the axis 2 direction center line as the axis of symmetry. Further, the elastic disc portion 19 has a substantially rectangular cross-sectional shape when viewed in the circumferential direction. That is, the elastic disc portion 19 is formed so as to extend toward the axis without being inclined in the direction of the axis 2.

また、弾性円板部１９の弾性円筒部１６Ａ（溝部３０の溝底面）からの突出寸法を、弾性円板部１７Ａの弾性円筒部１６Ａ（溝部３０の溝底面）からの突出寸法Ｈよりも大としている。
また、弾性円板部１９の軸２方向に沿う厚さ寸法を、弾性円板部１７Ａ及び第１芯金１１Ａの芯金円板部１３Ａの軸２方向に沿う厚さ寸法よりも大としている。この弾性円板部１９は、弾性円板部１７Ａよりも弾性変形し難い構成とされ、弾性円板部１７Ａよりも剛性が大とされている。
また、この弾性円板部１９は、外部空間側に向く面が第１芯金１１Ａの芯金円板部１３Ａの外部空間側に向く面と面一状となるように設けられている。また、この弾性円板部１９及び弾性円板部１７Ａの互いに向き合う面が溝部３０の溝幅方向両溝内壁面を構成する。つまり、本実施形態では、第１弾性部材１５Ａが溝部３０の溝幅方向両溝内壁面及び溝底面を区画する構成としている。この溝部３０は、上記各実施形態とは逆側となる径方向内側に向けて開口し、かつ当該第１シール部材１０Ａの全周に亘って設けられている。 Further, the protrusion dimension of the elastic disc portion 19 from the elastic cylindrical portion 16A (groove bottom surface of the groove portion 30) is larger than the protrusion dimension H of the elastic disc portion 17A from the elastic cylindrical portion 16A (groove bottom surface of the groove portion 30). I am trying.
Further, the thickness dimension of the elastic disc portion 19 along the axis 2 direction is set to be larger than the thickness dimension of the elastic disc portion 17A and the core metal disc portion 13A of the first core metal 11A along the axis 2 direction. .. The elastic disc portion 19 is configured to be less elastically deformable than the elastic disc portion 17A, and has higher rigidity than the elastic disc portion 17A.
The elastic disk portion 19 is provided such that the surface thereof facing the external space is flush with the surface of the core metal disk portion 13A of the first core metal 11A facing the external space. Further, the surfaces of the elastic disk portion 19 and the elastic disk portion 17A facing each other form the groove width direction both groove inner wall surfaces of the groove portion 30. That is, in the present embodiment, the first elastic member 15A defines the groove width direction both groove inner wall surfaces and the groove bottom surface of the groove portion 30. The groove portion 30 opens inward in the radial direction, which is the opposite side of the above-described embodiments, and is provided over the entire circumference of the first seal member 10A.

第２芯金２１Ａは、内輪４の外周面４ｂに嵌合され、第２円筒部を構成する芯金円筒部２２Ａと、この芯金円筒部２２Ａの被シール空間６側端部に連なり、該端部から径方向外側に向けて突出するように環状に設けられ、第３円板部を構成する芯金円板部２３Ａと、を備えている。
芯金円筒部２２Ａは、第１シール部材１０Ａ及び第２シール部材２０Ｂが外輪５及び内輪４に装着された状態で、外部空間側に向く端面が第１シール部材１０Ａの芯金円板部１３Ａ及び弾性円板部１９の外部空間側に向く面と略同一平面状となるように配される構成とされている。本実施形態では、この芯金円筒部２２Ａの外周面並びに芯金円板部２３Ａの外部空間側に向く面及び先端面を第２弾性部材２５Ｂによって被覆せずに露出させた構成としている。 The second cored bar 21A is fitted to the outer peripheral surface 4b of the inner ring 4 and is continuous with the cored bar cylindrical portion 22A forming the second cylindrical part and the end of the cored bar cylindrical portion 22A on the sealed space 6 side. A cored bar disc portion 23A that is provided in an annular shape so as to project radially outward from the end portion and that constitutes a third disc portion is provided.
The core metal cylindrical portion 22A has an end surface facing the external space side when the first seal member 10A and the second seal member 20B are attached to the outer ring 5 and the inner ring 4, and the core metal disc portion 13A of the first seal member 10A. In addition, the elastic disk portion 19 is arranged so as to be substantially flush with the surface of the elastic disk portion 19 facing the external space. In the present embodiment, the outer peripheral surface of the cored bar cylindrical portion 22A, the surface of the cored bar disk portion 23A facing the external space side, and the tip end surface are exposed without being covered by the second elastic member 25B.

芯金円板部２３Ａは、本実施形態では、軸２方向に見て、第１シール部材１０Ａの芯金円板部１３Ａと重なり合わないように配される構成とされている。また、芯金円板部２３Ａは、上記と概ね同様、第１シール部材１０Ａの溝部３０に挿入される構成とされている。つまり、本実施形態では、第１シール部材１０Ａの溝部３０に挿入される第３円板部を、金属材から形成された芯金円板部２３Ａとしている。また、この芯金円板部２３Ａが溝部３０に挿入された状態で、芯金円板部２３Ａの軸２方向両側と第１シール部材１０Ａの溝部３０の溝幅方向両側の溝内壁面を構成する弾性円板部１７Ａ及び弾性円板部１９とが対向されて径方向に延びる第２非接触シール部３２及び第４非接触シール部３４が形成される構成とされている。また、芯金円板部２３Ａが溝部３０に挿入された状態で、芯金円板部２３Ａの先端部と第１シール部材１０Ａの溝部３０の溝底面を構成する弾性円筒部１６Ａとが対向されて軸２方向に延びる第３非接触シール部３３が形成される構成とされている。 In the present embodiment, the core metal disc portion 23A is arranged so as not to overlap the core metal disc portion 13A of the first seal member 10A when viewed in the axis 2 direction. Further, the cored bar disc portion 23A is configured to be inserted into the groove portion 30 of the first seal member 10A, in substantially the same manner as described above. That is, in the present embodiment, the third disc portion inserted into the groove 30 of the first seal member 10A is the core disc portion 23A made of a metal material. Further, in a state where the core metal disc portion 23A is inserted into the groove portion 30, the inner wall surfaces of the groove on both sides of the core metal disc portion 23A in the axis 2 direction and on both sides of the groove portion 30 of the first seal member 10A in the groove width direction are formed. The elastic disc portion 17A and the elastic disc portion 19 are opposed to each other, and the second non-contact seal portion 32 and the fourth non-contact seal portion 34 extending in the radial direction are formed. Further, with the core metal disc portion 23A inserted in the groove portion 30, the tip end portion of the core metal disc portion 23A and the elastic cylindrical portion 16A forming the groove bottom surface of the groove portion 30 of the first seal member 10A are opposed to each other. And a third non-contact seal portion 33 extending in the axial direction 2 is formed.

また、上記と概ね同様、この芯金円板部２３Ａの先端部と第１シール部材１０Ａの弾性円板部１７Ａの先端部とが軸２方向に見て互いに重なり合うように配される構成とされている。また、芯金円板部２３Ａの先端部と第１シール部材１０Ａの弾性円板部１７Ａ及び弾性円板部１９とは、上記と概ね同様、軸２方向に見て全周に亘って互いに重なり合うように配される構成とされている。また、上記と概ね同様、この芯金円板部２３Ａの厚さ寸法Ｔと第１シール部材１０Ａの弾性円板部１７Ａの突出寸法Ｈとを足し合わせた寸法を、溝部３０の溝幅寸法Ｗよりも小としている。
また、この芯金円板部２３Ａの厚さ寸法Ｔ及び芯金円筒部２２Ａの外周面からの突出寸法は、上記同様、第１シール部材１０Ａ及び第２シール部材２０Ｂが外輪５及び内輪４に装着された状態で、芯金円板部２３Ａの軸２方向両側及び先端部と溝部３０の両溝内壁面及び溝底面との間に非接触シール部３２，３３，３４が形成されるように適宜の寸法としてもよい。 Further, in a similar manner to the above, the tip end portion of the core metal disc portion 23A and the tip end portion of the elastic disc portion 17A of the first seal member 10A are arranged so as to overlap each other when viewed in the axial 2 direction. ing. Further, the tip end portion of the core metal disc portion 23A and the elastic disc portion 17A and the elastic disc portion 19 of the first seal member 10A overlap with each other over the entire circumference when viewed in the axial 2 direction, substantially in the same manner as described above. It is arranged as follows. Further, in a manner similar to the above, the sum of the thickness dimension T of the core metal disc portion 23A and the protrusion dimension H of the elastic disc portion 17A of the first seal member 10A is the groove width dimension W of the groove portion 30. Smaller than.
In addition, the thickness T of the core metal disc portion 23A and the projection size of the core metal cylindrical portion 22A from the outer peripheral surface are similar to those described above, when the first seal member 10A and the second seal member 20B are attached to the outer ring 5 and the inner ring 4. In the mounted state, the non-contact seal portions 32, 33, 34 are formed between the two axial ends of the core metal disc portion 23A and between the tip portion and both groove inner wall surfaces and the groove bottom surface of the groove portion 30. It may have an appropriate size.

第２弾性部材２５Ｂは、本実施形態では、芯金円板部２３Ａの突出方向基端側部位の被シール空間６側に向く面を被覆するように設けられ、かつ、上記した第１シール部材１０Ａの弾性円板部１７Ａの先端部とによって第５非接触シール部３５を形成する構成とされている。また、この第２弾性部材２５Ｂは、第２円筒部を構成し、芯金円板部２３Ａの基端側部位から被シール空間６側に向けて突出するように環状に設けられている。また、この第２弾性部材２５Ｂは、内周面が芯金円筒部２２Ａの内周面と面一状となるように設けられている。この第２弾性部材２５Ｂの軸２方向に沿う寸法は、第１シール部材１０Ａ及び第２シール部材２０Ｂが外輪５及び内輪４に装着された状態で、被シール空間６側に向く面が第１シール部材１０Ａの弾性円板部１７Ａの被シール空間６側に向く面よりも軸２方向で被シール空間６側に位置するように適宜の寸法としてもよい。図例では、この第２弾性部材２５Ｂを、第１シール部材１０Ａ及び第２シール部材２０Ｂが外輪５及び内輪４に装着された状態で、被シール空間６側に向く面が第１シール部材１０Ａの内端被覆部１８Ａの被シール空間６側に向く面と概ね同一平面状に位置する構成としている。また、この第２弾性部材２５Ｂの径方向に沿う寸法は、第１シール部材１０Ａ及び第２シール部材２０Ｂが外輪５及び内輪４に装着された状態で、第１シール部材１０Ａの弾性円板部１７Ａの先端部との間に第５非接触シール部３５が形成されるように適宜の寸法としてもよい。 In the present embodiment, the second elastic member 25B is provided so as to cover the surface of the core metal disc portion 23A at the base end side in the protruding direction facing the sealed space 6 side, and the first seal member described above. A fifth non-contact seal portion 35 is formed by the tip end portion of the elastic disc portion 17A of 10A. Further, the second elastic member 25B constitutes a second cylindrical portion, and is provided in an annular shape so as to project from the base end side portion of the cored bar disc portion 23A toward the sealed space 6 side. Further, the second elastic member 25B is provided such that the inner peripheral surface thereof is flush with the inner peripheral surface of the cored bar cylindrical portion 22A. The dimension of the second elastic member 25B along the direction of the axis 2 is such that the surface facing the sealed space 6 side is the first when the first seal member 10A and the second seal member 20B are attached to the outer ring 5 and the inner ring 4. The elastic member 17A of the seal member 10A may be appropriately dimensioned so as to be positioned on the sealed space 6 side in the axial 2 direction with respect to the surface facing the sealed space 6 side. In the illustrated example, the surface of the second elastic member 25B facing the sealed space 6 is the first seal member 10A with the first seal member 10A and the second seal member 20B attached to the outer ring 5 and the inner ring 4. The inner end coating portion 18A is positioned substantially flush with the surface of the inner end covering portion 18A facing the sealed space 6 side. Further, the dimension of the second elastic member 25B along the radial direction is such that the elastic disc portion of the first seal member 10A is in a state where the first seal member 10A and the second seal member 20B are mounted on the outer ring 5 and the inner ring 4. It may have an appropriate size so that the fifth non-contact seal portion 35 is formed between the tip portion of 17A and the tip portion.

上記構成とされた本実施形態に係るシール装置９Ｂは、上記と概ね同様、第１シール部材１０Ａ及び第２シール部材２０Ｂが外輪５及び内輪４に装着されれば、外部空間と被シール空間６とを連通させるラビリンスシールが形成される。本実施形態においても、周方向に見た状態におけるラビリンスシールの隙間寸法を、外部空間から被シール空間６までの全体に亘って概ね一様な寸法としている。
また、本実施形態では、ラビリンスシールの外部空間側の開口を構成する第１非接触シール部３１が、上記第１実施形態よりも内輪４側において開口するように形成される。また、この第１非接触シール部３１の被シール空間６側に連なるように、かつ径方向外側に向けて延びるように第２非接触シール部３２が形成される。また、この第２非接触シール部３２の径方向外側に連なるように、かつ被シール空間６側に向けて延びるように第３非接触シール部３３が形成される。また、この第３非接触シール部３３の被シール空間６側に連なるように、かつ軸心側に向けて延びるように第４非接触シール部３４が形成される。また、この第４非接触シール部３４の軸心側に連なるように、かつ被シール空間６側に向けて延びるように第５非接触シール部３５が形成される。また、ラビリンスシールの被シール空間６側の開口を構成する第５非接触シール部３５が、内輪４と外輪５との間の径方向の概ね中央部において開口するように形成される。
上記構成とされた本実施形態に係るシール装置９Ｂ及びこれを備えた軸受装置１においても、上記した第１実施形態と概ね同様の効果を奏する。 In the sealing device 9B according to the present embodiment having the above-described configuration, if the first seal member 10A and the second seal member 20B are attached to the outer ring 5 and the inner ring 4, the outer space and the sealed space 6 are substantially the same as above. A labyrinth seal is formed that communicates with and. Also in the present embodiment, the gap size of the labyrinth seal when viewed in the circumferential direction is set to be substantially uniform over the entire space from the external space to the sealed space 6.
Further, in the present embodiment, the first non-contact seal portion 31 forming the opening of the labyrinth seal on the outer space side is formed so as to open on the inner ring 4 side as compared to the first embodiment. Further, the second non-contact seal portion 32 is formed so as to be continuous with the sealed space 6 side of the first non-contact seal portion 31 and extend outward in the radial direction. Further, the third non-contact seal portion 33 is formed so as to be continuous to the outside in the radial direction of the second non-contact seal portion 32 and extend toward the sealed space 6 side. Further, the fourth non-contact seal portion 34 is formed so as to be continuous with the sealed space 6 side of the third non-contact seal portion 33 and extend toward the axial center side. Further, a fifth non-contact seal portion 35 is formed so as to be continuous with the axial center side of the fourth non-contact seal portion 34 and extend toward the sealed space 6 side. Further, a fifth non-contact seal portion 35 forming an opening of the labyrinth seal on the sealed space 6 side is formed so as to open at a substantially central portion in the radial direction between the inner ring 4 and the outer ring 5.
The sealing device 9B according to the present embodiment having the above-described configuration and the bearing device 1 including the sealing device 9B also have substantially the same effects as those of the above-described first embodiment.

次に、本発明に係るシール装置の更に他の実施の形態について、図面を参照しながら説明する。
図６は、第４実施形態に係るシール装置の一例を模式的に示す図である。
なお、上記各実施形態との相違点について主に説明し、同様の構成については、同一符号を付し、その説明を省略または簡略に説明する。
また、本実施形態に係るシール装置９Ｃも、上記同様、相対的に同軸回転する内側部材としての内輪４及び外側部材としての外輪５で構成される軸受装置１に装着され、軸受装置１を構成する。 Next, still another embodiment of the sealing device according to the present invention will be described with reference to the drawings.
FIG. 6 is a diagram schematically showing an example of the sealing device according to the fourth embodiment.
The differences from the above-described embodiments will be mainly described, and the same configurations will be denoted by the same reference numerals, and the description thereof will be omitted or briefly described.
In addition, the sealing device 9C according to the present embodiment is also mounted on the bearing device 1 configured by the inner ring 4 as the inner member and the outer ring 5 as the outer member that rotate relatively coaxially, as in the above, to configure the bearing device 1. To do.

本実施形態に係るシール装置９Ｃは、上記第３実施形態と同様、第１シール部材１０Ｂを、外輪５に装着されるものとし、第２シール部材２０Ｃを、内輪４に装着されるものとしている。
第１シール部材１０Ｂの第１芯金１１Ｂは、外輪５の内周面５ｂに嵌合され、第１円筒部を構成する芯金円筒部１２Ｂと、この芯金円筒部１２Ｂの外部空間側端部に連なり、該端部から軸心側に向けて突出するように環状に設けられ、第２円板部を構成する芯金円板部１３Ｂと、を備えている。つまり、本実施形態では、上記第３実施形態とは異なり、上記第１実施形態及び第２実施形態と同様、芯金円板部１３Ｂがラビリンスシールを区画する構成としている。この芯金円板部１３Ｂは、その周端部となる突出方向先端部が対向される部位としての内輪４の外周面４ｂに対向されて軸２方向に延びる非接触シール部としての第１非接触シール部３１を形成する構成とされている。図例では、この芯金円板部１３Ｂの先端部が対向される部位となる内輪４の外周面４ｂに、Ｃ面取状の面取部を設けた例を示しているが、このような態様に限られない。
また、この芯金円板部１３Ｂの径方向に沿う突出寸法は、第１シール部材１０Ｂが外輪５に装着された状態で、その先端部と内輪４の外周面４ｂとの間に第１非接触シール部３１が形成されるように適宜の寸法としてもよい。 In the sealing device 9C according to the present embodiment, the first sealing member 10B is attached to the outer ring 5 and the second sealing member 20C is attached to the inner ring 4, as in the third embodiment. ..
The first cored bar 11B of the first seal member 10B is fitted to the inner peripheral surface 5b of the outer ring 5 and forms a first cylindrical part, and a cored bar cylindrical part 12B and an end of the cored bar cylindrical part 12B on the outer space side. And a metal core disc portion 13B which is provided in an annular shape so as to project from the end portion toward the axial center side and which constitutes a second disc portion. That is, in the present embodiment, unlike the third embodiment, as in the first and second embodiments, the cored bar disc portion 13B partitions the labyrinth seal. The core metal disc portion 13B is a first non-contact seal portion that extends in the axis 2 direction and faces the outer peripheral surface 4b of the inner ring 4 that is a portion where the tip end in the protruding direction that is the peripheral end portion thereof faces. The contact seal portion 31 is formed. In the illustrated example, the C-chamfered chamfered portion is provided on the outer peripheral surface 4b of the inner ring 4, which is the portion where the tip end of the core metal disc portion 13B is opposed. It is not limited to the mode.
In addition, the projecting dimension along the radial direction of the cored bar disc portion 13B is such that the first non-contact portion between the tip portion and the outer peripheral surface 4b of the inner ring 4 is the state where the first seal member 10B is mounted on the outer ring 5. It may have an appropriate size so that the contact seal portion 31 is formed.

第１シール部材１０Ｂの第１弾性部材１５Ｂは、第１芯金１１Ｂの芯金円筒部１２Ｂの内周面を被覆するように設けられ、第１円筒部を構成する弾性円筒部１６Ｂと、この弾性円筒部１６Ｂの被シール空間６側端部に連なり、該端部から軸心側に向けて突出するように環状に設けられ、第１円板部を構成する弾性円板部１７Ｂと、を備えている。また、第１弾性部材１５Ｂは、第１芯金１１Ｂの芯金円筒部１２Ｂの被シール空間６側端部を被覆するように設けられた内端被覆部１８Ｂを備えている。また、本実施形態では、弾性円筒部１６Ｂの被シール空間６側端部及び内端被覆部１８Ｂから軸心側に向けて突出するように弾性円板部１７Ｂを設けた構成としている。また、内端被覆部１８Ｂの被シール空間６側に向く面と弾性円板部１７Ｂの被シール空間６側に向く面とを面一状としている。
また、弾性円板部１７Ｂは、その周端部となる突出方向先端部が対向される部位としての第２弾性部材２５Ｃの弾性基部２６Ｂの外周面に対向されて軸２方向に延び、被シール空間６側において開口する非接触シール部としての第５非接触シール部３５を形成する構成とされている。この弾性円板部１７Ｂの突出寸法は、上記と概ね同様、第１シール部材１０Ｂ及び第２シール部材２０Ｃが外輪５及び内輪４に装着された状態で、その先端部と第２弾性部材２５Ｃの弾性基部２６Ｂの外周面との間に第５非接触シール部３５が形成されるように適宜の寸法としてもよい。 The first elastic member 15B of the first seal member 10B is provided so as to cover the inner peripheral surface of the cored bar cylindrical section 12B of the first cored bar 11B, and the elastic cylindrical section 16B constituting the first cylindrical section, An elastic disc portion 17B which is connected to the end of the elastic cylindrical portion 16B on the sealed space 6 side and which is annularly provided so as to project from the end toward the axial center side and which constitutes the first disc portion; I have it. Further, the first elastic member 15B includes an inner end covering portion 18B provided so as to cover an end portion of the cored bar cylindrical portion 12B of the first cored bar 11B on the sealed space 6 side. Further, in the present embodiment, the elastic disk portion 17B is provided so as to project from the end portion of the elastic cylindrical portion 16B on the sealed space 6 side and the inner end covering portion 18B toward the axial center side. Further, the surface of the inner end covering portion 18B facing the sealed space 6 side and the surface of the elastic disk portion 17B facing the sealed space 6 side are flush with each other.
Further, the elastic disc portion 17B extends in the axial 2 direction by facing the outer peripheral surface of the elastic base portion 26B of the second elastic member 25C, which is a portion where the tip end in the projecting direction which is the peripheral end portion thereof, faces and is sealed. A fifth non-contact seal portion 35 is formed as a non-contact seal portion that opens on the space 6 side. The projecting size of the elastic disk portion 17B is similar to that described above, in the state where the first seal member 10B and the second seal member 20C are attached to the outer ring 5 and the inner ring 4, the tip end portion and the second elastic member 25C. It may have an appropriate size so that the fifth non-contact seal portion 35 is formed between the outer peripheral surface of the elastic base portion 26B.

第２シール部材２０Ｃの第２芯金２１Ｂは、内輪４の外周面４ｂに嵌合され、第２円筒部を構成する芯金円筒部２２Ｂと、この芯金円筒部２２Ｂの被シール空間６側端部に連なり、該端部から径方向外側に向けて突出するように環状に設けられた芯金円板部２３Ｂと、を備えている。この芯金円板部２３Ｂは、第１シール部材１０Ｂ及び第２シール部材２０Ｃが外輪５及び内輪４に装着された状態で、被シール空間６側に向く面が第１シール部材１０Ｂの弾性円板部１７Ｂの被シール空間６側に向く面と略同一平面状となるように配される構成とされている。
第２シール部材２０Ｃの第２弾性部材２５Ｃは、第２芯金２１Ｂの芯金円筒部２２Ｂの内周面及び芯金円板部２３Ｂの外部空間側に向く面を被覆するように設けられ、第２円筒部を構成する弾性基部２６Ｂと、この弾性基部２６Ｂの外部空間側端部に連なり、該端部から径方向外側に向けて突出するように環状に設けられ、第３円板部を構成する弾性円板部２７Ａと、を備えている。また、第２弾性部材２５Ｃは、第２芯金２１Ｂの芯金円筒部２２Ｂの外部空間側端部を被覆するように設けられた外端被覆部２８Ａを備えている。また、第２弾性部材２５Ｃは、第２芯金２１Ｂの芯金円板部２３Ｂの径方向外側の端部を被覆するように設けられた先端被覆部２９Ａを備えている。 The second cored bar 21B of the second seal member 20C is fitted to the outer peripheral surface 4b of the inner ring 4 and forms a second cylindrical part, and the cored bar cylindrical part 22B and the sealed space 6 side of the cored bar cylindrical part 22B. The metal core disc portion 23B is provided in an annular shape so as to be continuous with the end portion and project radially outward from the end portion. The core metal disc portion 23B has an elastic circle of the first seal member 10B whose surface facing the sealed space 6 side when the first seal member 10B and the second seal member 20C are attached to the outer ring 5 and the inner ring 4. The plate portion 17B is arranged so as to be substantially flush with the surface of the plate portion 17B facing the sealed space 6 side.
The second elastic member 25C of the second seal member 20C is provided so as to cover the inner peripheral surface of the cored bar cylindrical portion 22B of the second cored bar 21B and the surface of the cored bar disk portion 23B facing the outer space side. The elastic base portion 26B that constitutes the second cylindrical portion and the outer space side end portion of the elastic base portion 26B are provided in an annular shape so as to project radially outward from the end portion, and the third disk portion The elastic disk part 27A which comprises is comprised. In addition, the second elastic member 25C includes an outer end covering portion 28A provided so as to cover the end portion of the core metal cylindrical portion 22B of the second core metal 21B on the external space side. In addition, the second elastic member 25C includes a tip covering portion 29A that is provided so as to cover the radially outer end of the cored bar portion 23B of the second cored bar 21B.

弾性基部２６Ｂは、外部空間側に向く面が外端被覆部２８Ａの外部空間側に向く面と面一状となるように設けられている。また、弾性基部２６Ｂは、外周面が先端被覆部２９Ａの外周面と面一状となるように設けられている。
弾性円板部２７Ａは、上記第１実施形態及び第２実施形態と同様、第１シール部材１０Ｂの溝部３０に挿入される構成とされている。この弾性円板部２７Ａよりも被シール空間６側の弾性基部２６Ｂ及び先端被覆部２９Ａの外周面に、上記した第１シール部材１０Ｂの弾性円板部１７Ｂの先端部が対向される。また、この弾性円板部２７Ａは、外部空間側に向く面が弾性基部２６Ｂ及び外端被覆部２８Ａの外部空間側に向く面よりも僅かに被シール空間６側に位置するように設けられている。この弾性円板部２７Ａが溝部３０に挿入された状態で、上記と概ね同様、この弾性円板部２７Ａの軸２方向両側と溝部３０の溝幅方向両側の溝内壁面との間に径方向に延びる第２非接触シール部３２及び第４非接触シール部３４が形成され、弾性円板部２７Ａの先端部と溝部３０の溝底面との間に軸２方向に延びる第３非接触シール部３３が形成される構成とされている。また、第２非接触シール部３２は、弾性円板部２７Ａの軸心側に連なるように設けられた弾性基部２６Ｂと芯金円板部１３Ｂとの間にも連なるように形成される。 The elastic base portion 26B is provided such that the surface facing the external space is flush with the surface of the outer end covering portion 28A facing the external space. Further, the elastic base portion 26B is provided such that the outer peripheral surface thereof is flush with the outer peripheral surface of the tip covering portion 29A.
The elastic disc portion 27A is configured to be inserted into the groove portion 30 of the first seal member 10B, as in the first and second embodiments. The tip end portion of the elastic disc portion 17B of the first seal member 10B is opposed to the outer peripheral surfaces of the elastic base portion 26B and the tip covering portion 29A on the sealed space 6 side of the elastic disc portion 27A. The elastic disk portion 27A is provided such that the surface thereof facing the external space is slightly closer to the sealed space 6 side than the surfaces of the elastic base portion 26B and the outer end covering portion 28A facing the external space side. There is. With the elastic disc portion 27A inserted into the groove portion 30, in a radial direction between the elastic disc portion 27A on both sides in the axial 2 direction and the groove inner wall surfaces on both sides in the groove width direction in a similar manner to the above. A second non-contact seal part 32 and a fourth non-contact seal part 34 extending in the axial direction, and a third non-contact seal part extending in the axial 2 direction between the tip of the elastic disc part 27A and the groove bottom surface of the groove part 30. 33 is formed. Further, the second non-contact seal portion 32 is also formed so as to be continuous between the elastic base portion 26B provided so as to be continuous with the axial center side of the elastic disc portion 27A and the core metal disc portion 13B.

また、本実施形態では、この弾性円板部２７Ａを、互いに軸２方向に移動させるようにして第１シール部材１０Ｂと第２シール部材２０Ｃとを組み合わせる際に、主として弾性変形する弾性を有した円板部を構成するものとしている（図６（ｂ）参照）。この弾性円板部２７Ａの軸２方向に沿う厚さ寸法は、第５非接触シール部３５の径方向に沿う寸法よりも小とされている。
また、上記した第１シール部材１０Ｂの弾性円板部１７Ｂは、互いに軸２方向に移動させるようにして第１シール部材１０Ｂと第２シール部材２０Ｃとを組み合わせる際に、第２シール部材２０Ｃの弾性円板部２７Ａよりも弾性変形され難いように、第２シール部材２０Ｃの弾性円板部２７Ａよりも剛性が大とされている。
また、本実施形態では、この弾性円板部２７Ａの突出寸法Ｈ１を、溝部３０の溝幅寸法Ｗよりも小としている。つまり、上記と概ね同様、図６（ｂ）に示すように、互いに軸２方向に移動させるようにして第１シール部材１０Ｂと第２シール部材２０Ｃとを組み合わせる際に、第１シール部材１０Ｂの弾性円板部１７Ｂによって倒伏されるように弾性変形する第２シール部材２０Ｃの弾性円板部２７Ａの復元が可能なように、溝部３０の溝幅寸法Ｗを弾性円板部２７Ａの突出寸法Ｈ１よりも大としている。なお、本実施形態のように、第１シール部材１０Ｂの弾性円板部１７Ｂを弾性材料から形成されたものとした場合には、上記と概ね同様、この第１シール部材１０Ｂの弾性円板部１７Ｂの変形を考慮して各寸法Ｈ１，Ｗを設定するようにしてもよい。 Further, in the present embodiment, the elastic disc portion 27A has elasticity that is mainly elastically deformed when the first seal member 10B and the second seal member 20C are combined so as to move in the axial 2 direction with respect to each other. It is assumed that the disk portion is configured (see FIG. 6B). The thickness dimension of the elastic disc portion 27A along the axis 2 direction is smaller than the dimension of the fifth non-contact seal portion 35 along the radial direction.
In addition, when the elastic disc portion 17B of the first seal member 10B described above is moved in the axial 2 direction with respect to each other and the first seal member 10B and the second seal member 20C are combined, The rigidity of the second seal member 20C is higher than that of the elastic disk portion 27A so that it is less likely to be elastically deformed than the elastic disk portion 27A.
Further, in this embodiment, the protruding dimension H1 of the elastic disk portion 27A is smaller than the groove width dimension W of the groove portion 30. That is, in a manner similar to the above, as shown in FIG. 6B, when the first seal member 10B and the second seal member 20C are combined so as to move in the axial 2 direction, the first seal member 10B The groove width dimension W of the groove portion 30 is set to the protrusion dimension H1 of the elastic disc portion 27A so that the elastic disc portion 27A of the second seal member 20C that elastically deforms so as to fall down by the elastic disc portion 17B can be restored. Is greater than. When the elastic disc portion 17B of the first seal member 10B is made of an elastic material as in this embodiment, the elastic disc portion of the first seal member 10B is substantially the same as above. The dimensions H1 and W may be set in consideration of the deformation of 17B.

上記構成とされた本実施形態に係るシール装置９Ｃは、上記と概ね同様、第１シール部材１０Ｂ及び第２シール部材２０Ｃが外輪５及び内輪４に装着されれば、外部空間と被シール空間６とを連通させるラビリンスシールが形成される。本実施形態においても、周方向に見た状態におけるラビリンスシールの隙間寸法を、外部空間から被シール空間６までの全体に亘って概ね一様な寸法としている。図例では、弾性基部２６Ｂと芯金円板部１３Ｂとの間に形成される第２非接触シール部３２の隙間寸法を、弾性円板部２７Ａと芯金円板部１３Ｂとの間に形成される第２非接触シール部３２の隙間寸法よりも僅かに小さくした例を示している。
また、本実施形態では、ラビリンスシールの外部空間側の開口を構成する第１非接触シール部３１が、内輪４の外周面４ｂに沿って開口するように形成される。また、この第１非接触シール部３１以外の非接触シール部３２，３３，３４，３５は、上記第３実施形態と概ね同様に形成される。
上記構成とされた本実施形態に係るシール装置９Ｃ及びこれを備えた軸受装置１においても、上記した第１実施形態と概ね同様の効果を奏する。 In the sealing device 9C according to the present embodiment having the above-mentioned configuration, if the first seal member 10B and the second seal member 20C are attached to the outer ring 5 and the inner ring 4, the outer space and the sealed space 6 are substantially the same as above. A labyrinth seal is formed that communicates with and. Also in the present embodiment, the gap size of the labyrinth seal when viewed in the circumferential direction is set to be substantially uniform over the entire space from the external space to the sealed space 6. In the illustrated example, the clearance dimension of the second non-contact seal portion 32 formed between the elastic base portion 26B and the core metal disc portion 13B is formed between the elastic disc portion 27A and the core metal disc portion 13B. An example is shown in which the gap size of the second non-contact seal portion 32 is made slightly smaller.
Further, in the present embodiment, the first non-contact seal portion 31 forming the opening on the outer space side of the labyrinth seal is formed so as to open along the outer peripheral surface 4b of the inner ring 4. The non-contact seal parts 32, 33, 34, 35 other than the first non-contact seal part 31 are formed in substantially the same manner as in the third embodiment.
The sealing device 9C according to the present embodiment configured as described above and the bearing device 1 including the sealing device 9C also have substantially the same effects as the above-described first embodiment.

次に、本発明に係るシール装置の更に他の実施の形態について、図面を参照しながら説明する。
図７は、第５実施形態に係るシール装置の一例を模式的に示す図である。
なお、上記各実施形態との相違点について主に説明し、同様の構成については、同一符号を付し、その説明を省略または簡略に説明する。
また、本実施形態に係るシール装置９Ｄも、上記同様、相対的に同軸回転する内側部材としての内輪４及び外側部材としての外輪５で構成される軸受装置１に装着され、軸受装置１を構成する。 Next, still another embodiment of the sealing device according to the present invention will be described with reference to the drawings.
FIG. 7 is a diagram schematically showing an example of the sealing device according to the fifth embodiment.
The differences from the above-described embodiments will be mainly described, and the same configurations will be denoted by the same reference numerals, and the description thereof will be omitted or briefly described.
In addition, the sealing device 9D according to the present embodiment is also mounted on the bearing device 1 including the inner ring 4 as the inner member and the outer ring 5 as the outer member, which relatively coaxially rotate, similarly to the above, and constitutes the bearing device 1. To do.

本実施形態に係るシール装置９Ｄは、上記第３実施形態と同様、第１シール部材１０Ｃを、外輪５に装着されるものとし、第２シール部材２０Ｄを、内輪４に装着されるものとしている。
また、本実施形態では、上記第３実施形態と概ね同様、第１シール部材１０Ｃの第１芯金１１Ｃの第１円筒部を構成する芯金円筒部１２Ｃの内周面及び第２円板部を構成する芯金円板部１３Ｃの被シール空間６側に向く面を被覆するように第１弾性部材１５Ｃを設けた構成としている。また、本実施形態においても、第１弾性部材１５Ｃは、第１円筒部を構成する弾性円筒部１６Ｃの被シール空間６側端部に連なり、第１芯金１１Ｃの芯金円筒部１２Ｃの被シール空間６側端部を被覆するように設けられた内端被覆部１８Ｃを備えている。また、本実施形態では、第１円板部を構成する弾性円板部１７Ｃを、内端被覆部１８Ｃの被シール空間６側端部から軸心側に向けて突出するように設けた構成としている。また、溝部３０の溝底面を、弾性円筒部１６Ｃと内端被覆部１８Ｃとによって区画した構成としている。換言すれば、弾性円筒部１６Ｃを、芯金円筒部１２Ｃよりも被シール空間６側に延出させるように設けた構成としている。 In the sealing device 9D according to the present embodiment, the first sealing member 10C is attached to the outer ring 5 and the second sealing member 20D is attached to the inner ring 4, as in the third embodiment. ..
Further, in the present embodiment, similar to the third embodiment described above, the inner peripheral surface of the cored bar cylindrical portion 12C and the second disc part that configure the first cylindrical part of the first cored bar 11C of the first seal member 10C. The first elastic member 15C is provided so as to cover the surface of the cored bar disk portion 13C constituting the above which faces the sealed space 6 side. Also in the present embodiment, the first elastic member 15C is connected to the end portion of the elastic cylindrical portion 16C forming the first cylindrical portion on the sealed space 6 side, and is covered by the cored bar cylindrical portion 12C of the first cored bar 11C. An inner end covering portion 18C provided so as to cover the end portion on the seal space 6 side is provided. Further, in the present embodiment, the elastic disc portion 17C forming the first disc portion is provided so as to project from the end portion of the inner end covering portion 18C on the sealed space 6 side toward the axial center side. There is. Further, the groove bottom surface of the groove portion 30 is divided by the elastic cylindrical portion 16C and the inner end covering portion 18C. In other words, the elastic cylindrical portion 16C is provided so as to extend to the sealed space 6 side from the cored bar cylindrical portion 12C.

また、弾性円板部１７Ｃは、上記第３実施形態と同様、互いに軸２方向に移動させるようにして第１シール部材１０Ｃと第２シール部材２０Ｄとを組み合わせる際に、主として弾性変形する弾性を有した円板部を構成する（図７（ｂ）参照）。また、本実施形態では、この弾性円板部１７Ｃの先端部とこれが対向される部位とによって非接触シール部が形成されない構成としている。つまり、弾性円板部１７Ｃの先端部の先側に、非接触シール部を構成する対向対象が配されない構成としている。
また、第１弾性部材１５Ｃに、芯金円板部１３Ｃとによって第２円板部を構成する弾性円板部１９Ａを設けた構成としている。この弾性円板部１９Ａは、弾性円筒部１６Ｃの外部空間側端部から連なり、芯金円板部１３Ｃの被シール空間６側に向く面及び先端部を被覆するように設けられている。また、上記第３実施形態と概ね同様、この弾性円板部１９Ａの先端部とこれが対向される部位としての第２円筒部を構成する芯金円筒部２２Ｃとによって軸２方向に延び、外部空間側において開口する第１非接触シール部３１を形成する構成とされている。また、本実施形態では、この弾性円板部１９Ａの先端部の外部空間側部位を被シール空間６側部位よりも軸心側に向けて突出させた構成としている。つまり、弾性円板部１９Ａの先端部に、段差部を設けた構成としている。 Further, the elastic disc portion 17C has elasticity that mainly elastically deforms when the first seal member 10C and the second seal member 20D are combined so as to move in the axial 2 direction, as in the third embodiment. The disk part that has this is configured (see FIG. 7B). Further, in the present embodiment, the non-contact seal portion is not formed by the tip portion of the elastic disc portion 17C and the portion facing the tip portion. That is, the facing object that constitutes the non-contact seal portion is not arranged on the tip side of the tip of the elastic disc portion 17C.
Further, the first elastic member 15C is provided with an elastic disc portion 19A that constitutes a second disc portion by the core metal disc portion 13C. The elastic disc portion 19A is continuous from the end of the elastic cylindrical portion 16C on the side of the outer space, and is provided so as to cover the surface of the core disc portion 13C facing the sealed space 6 side and the tip portion. Further, similar to the third embodiment, the tip end portion of the elastic disc portion 19A and the cored bar cylindrical portion 22C forming the second cylindrical portion as a portion facing the elastic disc portion 19A extend in the axis 2 direction to form an external space. The first non-contact seal portion 31 having an opening on the side is formed. Further, in the present embodiment, the outer space side portion of the tip end portion of the elastic disc portion 19A is configured to protrude toward the axial center side from the sealed space 6 side portion. That is, a stepped portion is provided at the tip of the elastic disc portion 19A.

第２シール部材２０Ｄは、本実施形態では、第２芯金２１Ｃのみによって構成されている。つまり、第２シール部材２０Ｄに、第２弾性部材を設けていない構成としている。
この第２芯金２１Ｃは、上記第３実施形態と概ね同様、内輪４の外周面４ｂに嵌合され、第２円筒部を構成する芯金円筒部２２Ｃと、この芯金円筒部２２Ｃの被シール空間６側端部に連なり、該端部から径方向外側に向けて突出するように環状に設けられ、第３円板部を構成する芯金円板部２３Ｃと、を備えている。
芯金円板部２３Ｃは、上記と概ね同様、第１シール部材１０Ｃの溝部３０に挿入される構成とされている。この芯金円板部２３Ｃが溝部３０に挿入された状態で、上記と概ね同様、この芯金円板部２３Ｃの軸２方向両側と溝部３０の溝幅方向両側の溝内壁面との間に径方向に延びる第２非接触シール部３２及び第４非接触シール部３４が形成され、芯金円板部２３Ｃの先端部と溝部３０の溝底面との間に軸２方向に延びる第３非接触シール部３３が形成される構成とされている。 In the present embodiment, the second seal member 20D is composed of only the second core metal 21C. That is, the second elastic member is not provided with the second elastic member.
The second cored bar 21C is fitted to the outer peripheral surface 4b of the inner ring 4 and is similar to the third embodiment, and the cored bar cylindrical portion 22C that constitutes the second cylindrical part and the cored bar cylindrical portion 22C is covered. A metal core disc portion 23C, which is connected to the end portion on the seal space 6 side and is provided in an annular shape so as to project radially outward from the end portion, and constitutes a third disc portion, is provided.
The cored bar disc portion 23C is configured to be inserted into the groove portion 30 of the first seal member 10C, similar to the above. In a state in which the core metal disc portion 23C is inserted into the groove portion 30, substantially the same as above, between the shaft 2 direction both sides of the core metal disc portion 23C and the groove inner wall surfaces of the groove portion 30 both sides in the groove width direction. A second non-contact seal part 32 and a fourth non-contact seal part 34 extending in the radial direction are formed, and a third non-contact part extending in the axis 2 direction is provided between the tip of the core metal disc part 23C and the groove bottom surface of the groove part 30. The contact seal portion 33 is formed.

上記構成とされた本実施形態に係るシール装置９Ｄは、上記と概ね同様、第１シール部材１０Ｃ及び第２シール部材２０Ｄが外輪５及び内輪４に装着されれば、外部空間と被シール空間６とを連通させるラビリンスシールが形成される。本実施形態では、上記のように、弾性円板部１９Ａの先端部に段差部を設けた構成としており、第１非接触シール部３１の被シール空間６側部位の径方向に沿う寸法が第１非接触シール部３１の外部空間側部位の径方向に沿う寸法よりも大となる構成とされている。また、この第１非接触シール部３１の外部空間側部位の径方向に沿う寸法、第２非接触シール部３２の軸２方向に沿う寸法及び第３非接触シール部３３の径方向に沿う寸法を略同寸法としている。また、第４非接触シール部３４の軸２方向に沿う寸法を、第２非接触シール部３２の軸２方向に沿う寸法よりも僅かに小としている。また、本実施形態では、第５非接触シール部が形成されない以外は、上記第３実施形態と概ね同様な経路のラビリンスシールが形成される。つまり、本実施形態では、ラビリンスシールの被シール空間６側の開口（第４非接触シール部３４）が、軸２方向ではなく、径方向（径方向内側）に開口する構成とされている。
上記構成とされた本実施形態に係るシール装置９Ｄ及びこれを備えた軸受装置１においても、上記した第１実施形態と概ね同様の効果を奏する。 In the sealing device 9D according to the present embodiment having the above-described configuration, if the first seal member 10C and the second seal member 20D are attached to the outer ring 5 and the inner ring 4, the outer space and the sealed space 6 are substantially the same as above. A labyrinth seal is formed that communicates with and. In the present embodiment, as described above, the step portion is provided at the tip of the elastic disc portion 19A, and the dimension of the first non-contact seal portion 31 on the sealed space 6 side in the radial direction is the first. It is configured to be larger than the dimension along the radial direction of the external space side portion of the 1 non-contact seal portion 31. The dimension of the first non-contact seal portion 31 along the radial direction of the external space side portion, the dimension of the second non-contact seal portion 32 along the axial 2 direction, and the dimension of the third non-contact seal portion 33 along the radial direction. Are approximately the same size. Further, the dimension of the fourth non-contact seal portion 34 along the axis 2 direction is slightly smaller than the dimension of the second non-contact seal portion 32 along the axis 2 direction. Further, in the present embodiment, a labyrinth seal having a path substantially similar to that of the third embodiment is formed except that the fifth non-contact seal portion is not formed. That is, in the present embodiment, the labyrinth seal is configured such that the opening (the fourth non-contact seal portion 34) on the sealed space 6 side is opened not in the axial direction 2 but in the radial direction (radially inside).
The sealing device 9D according to the present embodiment having the above-described configuration and the bearing device 1 including the sealing device 9D also have substantially the same effects as the above-described first embodiment.

なお、上記各実施形態に係るシール装置９，９Ａ〜９Ｄにおける互いに異なる構成を、適宜、組み替えたり、組み合わせたりして適用するようにしてもよい。
また、上記各実施形態では、第１円板部を構成する弾性円板部１７，１７Ａ，１７Ｂ，１７Ｃ、第２円板部を構成する弾性円板部１９、及び第３円板部を構成する弾性円板部２７，２７Ａの周方向に見た断面形状を、略方形状とした例を示しているが、このような態様に限られない。例えば、これら弾性円板部１７，１７Ａ，１７Ｂ，１７Ｃ，１９，２７，２７Ａの周方向に見た断面形状を、軸２方向中心線を対称軸とする線対称状となるように、三角形状や等脚台形状等としたり、軸方向両側に対称状に凹部や突部が設けられた形状等としたりしてもよい。
また、第１シール部材１０，１０Ａ〜１０Ｃ及び第２シール部材２０，２０Ａ〜２０Ｄを、全周に亘って略一様な断面形状とせずに、例えば、第１円板部を構成する弾性円板部１７，１７Ａ，１７Ｂ，１７Ｃ、第２円板部を構成する芯金円板部１３，１３Ｂ，１３Ｃ及び弾性円板部１９，１９Ａ、並びに第３円板部を構成する弾性円板部２７，２７Ａ及び芯金円板部２３Ａ，２３Ｃのうちの少なくとも一つの円板部の周方向の一部に切欠状の凹部等が設けられたものでもよい。 The different configurations of the sealing devices 9 and 9A to 9D according to the above-described embodiments may be appropriately rearranged or combined to be applied.
In each of the above embodiments, the elastic disk portions 17, 17A, 17B, 17C that form the first disk portion, the elastic disk portion 19 that forms the second disk portion, and the third disk portion are formed. An example is shown in which the cross-sectional shape of the elastic disc portions 27, 27A that are viewed in the circumferential direction is a substantially rectangular shape, but the present invention is not limited to such an aspect. For example, the cross-sectional shape of these elastic disk portions 17, 17A, 17B, 17C, 19, 27, 27A viewed in the circumferential direction is a triangular shape so that the cross-sectional shape is a line-symmetrical shape with the axis 2 direction centerline as the axis of symmetry. Alternatively, it may have an isosceles trapezoidal shape or the like, or may have a shape in which recesses or protrusions are symmetrically provided on both sides in the axial direction.
Further, the first seal member 10, 10A to 10C and the second seal member 20, 20A to 20D do not have a substantially uniform cross-sectional shape over the entire circumference, but are, for example, elastic circles forming the first disc portion. Plates 17, 17A, 17B, 17C, metal core discs 13, 13B, 13C and elastic discs 19, 19A forming the second disc, and elastic discs forming the third disc. A notch-shaped recess or the like may be provided in a part of the circumferential direction of at least one of the disk portions 27, 27A and the core metal disk portions 23A, 23C.

また、上記各実施形態では、第１円板部１７，１７Ａ，１７Ｂ，１７Ｃ、第２円板部１３，１３Ｂ，１３Ｃ，１９，１９Ａ、及び第３円板部２７，２７Ａ，２３Ａ，２３Ｃのうちの少なくとも一つの円板部を、金属材から形成された円板部を含んだ構成とした例を示しているが、このような態様に代えて、第１円板部、第２円板部及び第３円板部の全てを、弾性材料から形成されたものとしてもよい。上記各実施形態に係るシール装置９，９Ａ〜９Ｄを構成する第１シール部材１０，１０Ａ〜１０Ｃ及び第２シール部材２０，２０Ａ〜２０Ｄの具体的構成は、上記した例に限られず、その他、種々の変形が可能である。 Further, in each of the above-described embodiments, the first disc portion 17, 17A, 17B, 17C, the second disc portion 13, 13B, 13C, 19, 19A, and the third disc portion 27, 27A, 23A, 23C. An example is shown in which at least one of the disc parts includes a disc part formed of a metal material. However, instead of such an aspect, a first disc part and a second disc part are shown. All the parts and the third disk part may be made of an elastic material. The specific configurations of the first sealing members 10, 10A to 10C and the second sealing members 20, 20A to 20D configuring the sealing devices 9, 9A to 9D according to the above-described embodiments are not limited to the above-mentioned examples, and others. Various modifications are possible.

１ 軸受装置
４ 内輪（内側部材）
５ 外輪（外側部材）
６ 被シール空間
９，９Ａ〜９Ｄ シール装置
１０，１０Ａ〜１０Ｃ 第１シール部材
１２，１２Ａ〜１２Ｃ 芯金円筒部（第１円筒部）
１３，１３Ｂ，１３Ｃ 芯金円板部（第２円板部）
１６，１６Ａ〜１６Ｃ 弾性円筒部（第１円筒部）
１７，１７Ａ〜１７Ｃ 弾性円板部（第１円板部）
１９，１９Ａ 弾性円板部（第２円板部）
２０，２０Ａ〜２０Ｄ 第２シール部材
２２，２２Ａ〜２２Ｃ 芯金円筒部（第２円筒部）
２３Ａ，２３Ｃ 芯金円板部（第３円板部）
２５Ｂ 第２弾性部材（第２円筒部）
２６，２６Ａ，２６Ｂ 弾性基部（第２円筒部）
２７，２７Ａ 弾性円板部（第３円板部）
３０ 溝部
３１ 第１非接触シール部（軸方向に延びる非接触シール部）
３２ 第２非接触シール部（径方向に延びる非接触シール部）
３３ 第３非接触シール部（軸方向に延びる非接触シール部）
３４ 第４非接触シール部（径方向に延びる非接触シール部）
３５ 第５非接触シール部（軸方向に延びる非接触シール部）
Ｈ 第１円板部の突出寸法
Ｔ 第３円板部の厚さ寸法
Ｗ 溝部の溝幅寸法 1 Bearing device 4 Inner ring (inner member)
5 Outer ring (outer member)
6 Space to be sealed 9, 9A to 9D Sealing device 10, 10A to 10C First sealing member 12, 12A to 12C Core bar cylindrical portion (first cylindrical portion)
13, 13B, 13C core metal disc part (second disc part)
16, 16A to 16C Elastic cylindrical portion (first cylindrical portion)
17, 17A to 17C Elastic disc part (first disc part)
19, 19A elastic disk part (second disk part)
20, 20A to 20D Second seal member 22, 22A to 22C Core bar cylindrical portion (second cylindrical portion)
23A, 23C core disc part (third disc part)
25B Second elastic member (second cylindrical portion)
26, 26A, 26B Elastic base (second cylindrical portion)
27,27A elastic disc part (third disc part)
30 Groove 31 First non-contact seal part (non-contact seal part extending in the axial direction)
32 Second non-contact seal part (radial direction non-contact seal part)
33 Third non-contact seal part (non-contact seal part extending in the axial direction)
34 Fourth non-contact seal part (radial direction non-contact seal part)
35 Fifth non-contact seal portion (non-contact seal portion extending in the axial direction)
H Projecting dimension of the 1st disk part T Thickness dimension of the 3rd disk part W Groove width dimension of the groove part

Claims (9)

相対的に同軸回転する内側部材及び外側部材のうちの一方の部材に装着される第１シール部材と他方の部材に装着される第２シール部材とを備えており、
前記第１シール部材は、前記一方の部材に嵌合される第１円筒部と、該第１円筒部の軸方向に間隔を空けた部位からそれぞれ径方向に突出するように設けられた第１円板部及び第２円板部と、を有し、前記第２シール部材は、前記他方の部材に嵌合される第２円筒部と、該第２円筒部から径方向に突出するように設けられ、かつ前記第１シール部材の第１円筒部、第１円板部及び第２円板部によって区画された溝部に挿入される第３円板部と、を有し、
前記第１円板部が弾性を有した円板部とされ、該円板部の弾性変形を伴って前記第３円板部が前記溝部に挿入可能とされており、
前記第１シール部材及び前記第２シール部材が前記内側部材及び前記外側部材に装着された状態で、前記内側部材及び前記外側部材間の被シール空間と外部空間とを連通させるラビリンスシールを構成する軸方向に延びる複数の非接触シール部と径方向に延びる複数の非接触シール部とが交互に形成される構成とされており、
前記溝部の軸方向に沿う溝幅寸法は、前記第１円板部の前記第１円筒部からの突出寸法と前記第３円板部の軸方向に沿う厚さ寸法とを足し合わせた寸法よりも大とされていることを特徴とするシール装置。 A first seal member attached to one member of the inner member and the outer member that relatively rotate coaxially; and a second seal member attached to the other member,
The first seal member is provided so as to protrude in the radial direction from a first cylindrical portion fitted to the one member and a portion spaced apart in the axial direction of the first cylindrical portion. A second cylinder part fitted to the other member, and a second disk part, and a second disk part, and a second cylinder part protruding from the second cylinder part in a radial direction. And a third disc part inserted into a groove part defined by the first cylindrical part, the first disc part and the second disc part of the first seal member,
The first disc part is a disc part having elasticity, and the third disc part is insertable into the groove part with elastic deformation of the disc part,
A labyrinth seal for communicating a sealed space between the inner member and the outer member with an outer space in a state where the first seal member and the second seal member are mounted on the inner member and the outer member. A plurality of non-contact seal portions extending in the axial direction and a plurality of non-contact seal portions extending in the radial direction are alternately formed ,
The groove width dimension along the axial direction of the groove portion is obtained by adding the projection dimension of the first disc portion from the first cylindrical portion and the thickness dimension of the third disc portion along the axial direction. Sealing device characterized by being also large . 相対的に同軸回転する内側部材及び外側部材のうちの一方の部材に装着される第１シール部材と他方の部材に装着される第２シール部材とを備えており、A first seal member attached to one member of the inner member and the outer member that relatively rotate coaxially; and a second seal member attached to the other member,
前記第１シール部材は、前記一方の部材に嵌合される第１円筒部と、該第１円筒部の軸方向に間隔を空けた部位からそれぞれ径方向に突出するように設けられた第１円板部及び第２円板部と、を有し、前記第２シール部材は、前記他方の部材に嵌合される第２円筒部と、該第２円筒部から径方向に突出するように設けられ、かつ前記第１シール部材の第１円筒部、第１円板部及び第２円板部によって区画された溝部に挿入される第３円板部と、を有し、The first seal member is provided so as to protrude in the radial direction from a first cylindrical portion fitted to the one member and a portion spaced apart in the axial direction of the first cylindrical portion. A second cylinder part fitted to the other member, and a second disk part, and a second disk part, and a second cylinder part protruding from the second cylinder part in a radial direction. And a third disc part inserted into a groove part defined by the first cylindrical part, the first disc part and the second disc part of the first seal member,
前記第３円板部が弾性を有した円板部とされ、弾性変形を伴って前記溝部に挿入可能とされており、The third disc portion is a disc portion having elasticity and can be inserted into the groove portion with elastic deformation,
前記第１シール部材及び前記第２シール部材が前記内側部材及び前記外側部材に装着された状態で、前記内側部材及び前記外側部材間の被シール空間と外部空間とを連通させるラビリンスシールを構成する軸方向に延びる複数の非接触シール部と径方向に延びる複数の非接触シール部とが交互に形成される構成とされており、A labyrinth seal for communicating a sealed space between the inner member and the outer member with an outer space in a state where the first seal member and the second seal member are mounted on the inner member and the outer member. A plurality of non-contact seal portions extending in the axial direction and a plurality of non-contact seal portions extending in the radial direction are alternately formed,
前記溝部の軸方向に沿う溝幅寸法は、前記第３円板部の前記第２円筒部からの突出寸法よりも大とされ、前記第３円板部の軸方向に沿う厚さ寸法は、前記第１円板部の周端部と前記第２円筒部とが対向されて形成される前記軸方向に延びる非接触シール部の径方向に沿う寸法よりも小とされていることを特徴とするシール装置。The groove width dimension along the axial direction of the groove portion is made larger than the projecting dimension of the third disc portion from the second cylindrical portion, and the thickness dimension along the axial direction of the third disc portion is: It is smaller than the dimension along the radial direction of the non-contact seal portion that extends in the axial direction and that is formed by the peripheral end portion of the first disc portion and the second cylindrical portion that face each other. Sealing device. 請求項１において、In claim 1,
前記第１円板部の軸方向に沿う厚さ寸法は、前記第３円板部の周端部と前記第１円筒部とが対向されて形成される前記軸方向に延びる非接触シール部の径方向に沿う寸法よりも小とされていることを特徴とするシール装置。The thickness dimension along the axial direction of the first circular plate portion is equal to that of the non-contact seal portion extending in the axial direction formed by facing the peripheral end portion of the third circular disk portion and the first cylindrical portion. A sealing device characterized by being smaller than the dimension along the radial direction. 請求項１乃至３のいずれか１項において、
前記第３円板部が前記溝部に挿入された状態で、該第３円板部の軸方向両側と前記第１円板部及び前記第２円板部とが対向されて前記径方向に延びる非接触シール部が形成され、該第３円板部の周端部と前記第１円筒部とが対向されて前記軸方向に延びる非接触シール部が形成される構成とされていることを特徴とするシール装置。 In any one of Claim 1 thru|or 3 ,
In a state where the third disc portion is inserted into the groove, both axial sides of the third disc portion and the first disc portion and the second disc portion are opposed to each other and extend in the radial direction. A non-contact seal portion is formed, and a peripheral end portion of the third disc portion and the first cylindrical portion are opposed to each other to form a non-contact seal portion extending in the axial direction. And a sealing device. 請求項１乃至４のいずれか１項において、
前記第１円板部の周端部及び前記第２円板部の周端部とこれらが対向される部位とが対向されて前記軸方向に延びる非接触シール部が形成される構成とされていることを特徴とするシール装置。 In any one of Claim 1 thru|or 4 ,
A peripheral end portion of the first disc portion and a peripheral end portion of the second disc portion are opposed to a portion where they are opposed to each other to form a non-contact seal portion extending in the axial direction. Sealing device characterized by being 請求項１乃至５のいずれか１項において、
前記第１円板部は、前記第１円筒部からの突出寸法が前記第２円板部の前記第１円筒部からの突出寸法よりも小とされており、
前記第１円板部の周端部と前記第３円板部の周端部とが軸方向に見て互いに重なり合うように配される構成とされていることを特徴とするシール装置。 In any one of Claim 1 thru|or 5 ,
In the first disc portion, the projecting dimension from the first cylindrical portion is smaller than the projecting dimension of the second disc portion from the first cylindrical portion,
A sealing device, wherein a peripheral end portion of the first disc portion and a peripheral end portion of the third disc portion are arranged so as to overlap each other when viewed in the axial direction. 請求項１乃至６のいずれか１項において、
前記第３円板部の周端部と前記第１円板部及び前記第２円板部とは、軸方向に見て全周に亘って互いに重なり合うように配される構成とされていることを特徴とするシール装置。 In any one of Claim 1 thru|or 6 ,
The peripheral end portion of the third disc portion and the first disc portion and the second disc portion are arranged so as to overlap each other over the entire circumference when viewed in the axial direction. Sealing device characterized by. 請求項１乃至７のいずれか１項において、
前記弾性を有した円板部は、周方向に見た断面形状が軸方向中心線を対称軸とする線対称状となるように形成されていることを特徴とするシール装置。 In any one of Claims 1 thru|or 7 ,
The sealing device, wherein the elastic disk portion is formed so that a cross-sectional shape viewed in a circumferential direction is line-symmetrical with an axis of symmetry as an axis of symmetry. 相対的に同軸回転する内側部材及び外側部材と、これらに装着される請求項１乃至８のいずれか１項に記載のシール装置と、を備えていることを特徴とする軸受装置。 A bearing device comprising: an inner member and an outer member that relatively rotate coaxially; and the sealing device according to any one of claims 1 to 8 , which is attached to the inner member and the outer member.
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