JP2017227305A - Seal device and bearing device having the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seal device which can maintain a first seal member and a second seal member in a simply-combined state while capable of reducing the torque of a bearing device, and improving seal performance, and the bearing device having the same.SOLUTION: A seal device 9 comprises a first seal member which is attached to one member 4 out of an inside member 4 and an outside member 5 which relatively and coaxially rotate, and a second seal member attached to the other member 5. A plurality of non-contact seal parts extending to an axial direction which constitute a labyrinth seal for making a sealed space 6 between the inside member and the outside member and an external space communicate with each other in a state that the first and second seal members are attached to the inside member and the outside member, and a plurality of non-contact seal parts extending to a radial direction are alternately formed.SELECTED DRAWING: Figure 1

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 including an inner member and an outer member that rotate relatively 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 is known that is mounted on a bearing device that includes an inner member and an outer member that rotate relatively coaxially. As such a sealing device, a so-called pack having a structure in which a seal lip made of an elastic member is provided on a core metal attached to one member, and this seal lip is elastically brought into contact with a slinger attached to the other member. Seals (combination seals) are known. In such a sealing device, since the seal lip comes into contact with the slinger, the sliding resistance is increased, and the torque of the bearing device tends to be increased.
For example, in the following Patent Document 1, a first shield member provided with a first shield part that is bent obliquely in a direction approaching a ball at one end of a first fitting part fitted to an outer ring, A rolling bearing comprising: a second shield member provided with a second shield part that is bent obliquely in a direction away from the ball at one end of a second fitting part fitted to the inner ring. Yes. This rolling bearing has a configuration in which a first shield part and a second shield part are parallel to each other and a labyrinth seal is formed therebetween.

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 provided with three flanges constituting a labyrinth seal on an outer peripheral surface of an annular portion fitted to an inner ring, and each end face dimension is a first annular shape. A second annular member having a covering portion which is disposed so as to correspond to the dimension between the end faces of the three ribs of the member, and is provided with a pair of ribs which constitute a labyrinth seal with the three ribs; , A sealing structure including the above is disclosed. This seal structure has a configuration in which a rupture portion is provided in the covering portion of the second annular member, and the second annular member is covered with the outer peripheral surface of the first annular member by expanding the diameter so as to separate the broken portion. It is set as the structure which provided the seal holder which covers from the outer peripheral surface.
Further, in Patent Document 3 below, an elastic seal body provided with radially inner and outer lips extending in the axial direction is attached to the annular leg portion of the outer rigid carrier attached to the outer ring, and arranged around the 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. Yes. Further, the metal inner sleeve is provided with a containment flange that extends in the radially outward direction to maintain the assembly in an assembled state.

特開２０１２−１９３７６１号公報JP 2012-193761 A 特開２０００−６０６号公報Japanese Unexamined Patent Publication No. 2000-606 特許第５６６５１８３号公報Japanese 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 separated from each other in a state where they are not assembled to the rolling bearing. Further improvement is desired from the viewpoint.
Further, in the seal structure described in Patent Document 2, after the second annular member is expanded and covered on the outer peripheral surface of the first annular member, the seal holder is composed of a pair of ring members that are fixed to each other by a fixing bolt. Must be provided so as to cover the second annular member. Also, in the seal assembly described in Patent Document 3, in order to maintain the outer rigid carrier and the metal inner sleeve in an assembled state, the ends of the metal inner sleeve are crimped in a combined state. Therefore, it is necessary to form a containment flange by bending, etc., and the seal structure and seal assembly 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 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 are simply combined. It is an object of the present invention to provide a sealing device that can be maintained at the same time and a bearing device including the same.

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、前記第２円板部及び前記第３円板部のうちの少なくとも一つ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いることを特徴とする。   In order to achieve the above object, a seal device according to the present invention includes a first seal member attached to one member of an inner member and an outer member that rotate relatively coaxially, and a first member attached to the other member. The first sealing member includes a first cylindrical portion fitted to the one member and a radial direction from a portion spaced in the axial direction of the first cylindrical portion. A first disc portion and a second disc portion provided so as to protrude, and the second seal member is fitted to the other member, and the second cylinder A third disc portion provided so as to protrude in a radial direction from the portion and 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 at least one of the first disc portion, the second disc portion, and the third disc portion The disc portion has elasticity, the third disc portion can be inserted into the groove portion with elastic deformation of the disc portion, and the first seal member and the second seal member are A plurality of non-contact seal portions extending in the axial direction and a radial direction constituting a labyrinth seal that communicates between a sealed space between the inner member and the outer member and an 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 direction are alternately formed.

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 a combined state. That is, if the first seal member and the second seal member are relatively moved in the direction along the axial direction, the third disc portion is inserted into the groove portion with elastic deformation of the elastic disc portion. be able to. Thereby, it hold | maintains so that the 3rd cylindrical part of a 2nd seal member may be pinched | interposed by the 1st cylindrical part and the 2nd cylindrical part of a 1st seal member, and the state which combined the 1st seal member and the 2nd seal member Therefore, handling and assembly to the bearing device can be improved. In addition, the first seal member and the second seal member can be easily maintained in a combined state as compared with a member that needs to be covered with another member in a combined state or a member that requires caulking or the like.
Further, since the first seal member and the second seal member can constitute a non-contact type seal, the torque of the bearing device can be reduced as compared with the one having the elastically contacting seal lip. In addition, since deterioration due to wear or the like is less likely to occur, the service life can be extended. Further, since 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, a labyrinth seal having a relatively complicated path is formed. The sealing performance can be improved. Thereby, it is possible to suppress leakage of grease filled in the space to be sealed of the bearing device into the external space, and it is possible to suppress entry of dust and the like from the external space into the space to be sealed 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, in a state where the third disc portion is inserted into the groove portion, both axial sides of the third disc portion are opposed to the first disc portion and the second disc portion. A non-contact seal portion extending in the radial direction may be formed, and a non-contact seal portion extending in the axial direction may be formed by facing a peripheral end portion of the third disc portion and the first cylindrical portion. Good.
According to the present invention, the two non-contact seal portions extending 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 opposed to the circumferential end surface and both surfaces in the axial direction of the third disk portion, 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 of the first disc portion and the peripheral end of the second disc portion are opposed to a portion where they face each other to form a non-contact seal portion extending in the axial direction. A configuration may be used.
According to the present invention, the peripheral end portion of the first disc portion to be disposed on one side of the outer space side and the sealed space side is opposed to the portion facing the first disc portion and extends in the axial direction. A non-contact seal portion is formed, and the circumferential end portion of the second disk portion to be disposed on the other side of the external space side and the sealed space side is opposed to the portion where the second disk portion is opposed to the axial direction. A non-contact seal portion extending in the direction 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 communicates the sealed space and the external space. As a result, the leakage of grease filled in the sealed space of the bearing device to the external space can be more effectively suppressed, and the entry of dust and the like from the external space into the sealed space of the bearing device can be further reduced. 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, it is assumed that the projecting dimension of the first disc part is smaller than the projecting dimension of the second disc part from the first cylindrical part, At least one of the one disc portion and the third disc portion is a disc portion having the elasticity, and a peripheral end portion of the first disc portion and a peripheral end portion of the third disc portion, May be arranged so as to overlap each other when viewed in the axial direction.
According to the present invention, both the first disk part and the third disk part are moved by relatively moving the third disk part in the axial direction from the first disk part side having a small projecting dimension. Alternatively, the third disk portion can be easily inserted into the groove portion with one elastic deformation.

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, 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. It is good.
According to the present invention, at least one of the first disc portion, the second disc portion, and the third disc portion is provided with a notch-like recess at a peripheral end portion so as to provide a portion that does not overlap each other. As compared with the above, the sealing performance can be effectively improved.

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 disk part is the disk part having the elasticity, and the groove width dimension along the axial direction of the groove part is the protruding dimension of the first disk part from the first cylindrical part. And the 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 axial direction, and the third disc portion is inserted into the groove portion with the elastic deformation of the first disc portion. It is possible to suppress the first disc portion from falling down when combined. 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 laid down so as to be pressed against the third disc portion. However, if the third disc portion is brought close to or in contact with the second disc portion, the third disc portion gets over the first disc portion, and the first disc 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 disk portion having elasticity may be formed so that a cross-sectional shape viewed in the circumferential direction is axisymmetric with an axial center line as an axis of symmetry.
For example, when the disc portion having elasticity is formed in a lip shape inclined in one axial direction or a shape in which a concave portion is provided in one axial direction, this disc portion becomes the rotation side. When it is provided on a member, it is conceivable that the disk part may be deformed so as to fall down due to centrifugal force, or may be deformed so that it rises. It is conceivable that they will come into contact. According to the present invention, even when a disk portion having elasticity is provided on a member on the rotating side, deformation due to centrifugal force can be suppressed, and non-contact between the disk portion and a portion where the disk portion opposes is prevented. A 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。 In order to achieve the above object, a bearing device according to the present invention includes an inner member and an outer member that rotate relatively coaxially, and a seal device according to the present invention that is attached to these members. Features.
According to the present invention, the torque can be reduced as described above, and the sealing performance 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 sealing performance can be improved. And the second seal member can be easily maintained in a 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。It is a schematic longitudinal cross-sectional view which shows typically an example of the sealing device which concerns on one Embodiment of this invention, and an example of a bearing apparatus provided with the same. （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 part X in FIG. 1, and (b) is a schematic vertical cross-section corresponding to (a) schematically showing the state when the sealing device is combined. FIG. 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 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。(A) is a partially broken schematic enlarged vertical sectional view schematically showing an example of a sealing device according to another embodiment of the present invention and an example of a bearing device including the sealing device, and corresponding to FIG. 2 (a). (B) is a schematic longitudinal cross-sectional view corresponding to (a) schematically showing a state when the sealing device is combined. （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。(A) shows an example of a sealing device according to still another embodiment of the present invention and an example of a bearing device provided with the same, and is a partially broken schematic enlarged longitudinal section corresponding to FIG. FIG. 2B is a schematic longitudinal sectional view corresponding to FIG. 1A schematically showing a state when the sealing device is combined. （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。(A) shows an example of a sealing device according to still another embodiment of the present invention and an example of a bearing device provided with the same, and is a partially broken schematic enlarged longitudinal section corresponding to FIG. FIG. 2B is a schematic longitudinal sectional view corresponding to FIG. 1A schematically showing a state when the sealing device is combined. （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。(A) shows an example of a sealing device according to still another embodiment of the present invention and an example of a bearing device provided with the same, and is a partially broken schematic enlarged longitudinal section corresponding to FIG. FIG. 2B is a schematic longitudinal sectional view corresponding to FIG. 1A schematically showing a state when the sealing device is combined.

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.
In some of the drawings, some of the detailed reference numerals attached to other drawings are omitted.
Moreover, in FIG. 2, FIG. 4-7, it has illustrated as a cutting part end view which abbreviate | omitted illustration of the back side of a cut surface.
1-3 is a figure which shows typically an example of the sealing device which concerns on 1st Embodiment, and an example of a bearing apparatus provided with the same.

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 seal device 9 according to the present embodiment is configured to be mounted on a bearing device 1 including an inner ring 4 as an inner member and an outer ring 5 as an outer member that rotate relatively coaxially. ing.
The bearing device 1 according to the present embodiment includes an inner ring 4 and an outer ring 5, and a seal device 9 according to the present embodiment that is 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 into a bearing portion 3 such as a housing. The shaft 2 rotates with respect to the bearing portion 3, that is, the mode in which 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 is good also as an aspect.
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.
Between the inner ring 4 and the outer ring 5, a sealed space 6 is formed in an annular shape 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, the raceway 4 a of the inner ring 4 and the raceway 5 a of the outer ring 5 are interposed so as to roll while a single row of rolling elements 8 is held by a retainer (retainer) 7. The grease is filled. The bearing device 1 may have a configuration in which 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 grooved race rings 4a and 5a as shown in the drawing, and may be an angular ball bearing. The bearing device 1 is not limited to a ball bearing in which the rolling element 8 is a ball, and may be a roller bearing in which the rolling element 8 is a cylindrical roller, a tapered roller, or the like. One of them may be a bearing device 1 having a fixed portion such as a flange shape or a hub shape.
Further, the seal devices 9 and 9 according to the present embodiment are respectively mounted between the inner ring 4 and the outer ring 5 at both ends in the axial direction 2 in the sealed space 6. Both end portions of the sealed space 6 in the axial direction 2 are sealed by the sealing devices 9 on both sides in the axial direction of the shaft 2 so that foreign matters enter the sealed space 6 and the grease filled in the sealed space 6 is external to the sealed space 6. Leakage into is suppressed. In addition, since the sealing devices 9 and 9 on both sides in the two axial directions have the same configuration, the following description will be given by taking one sealing device 9 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. And. In the present embodiment, one member is an inner ring 4 and the other member is an outer ring 5.
The first seal member 10 is provided so as to protrude in the radial direction from the first cylindrical portions 12 and 16 fitted to the inner ring 4 and the portions of the first cylindrical portions 12 and 16 spaced apart in the axis 2 direction. The first disc portion 17 and the second disc portion 13 are provided. The second seal member 20 is provided so as to project from the second cylindrical portions 22 and 26 fitted to the outer ring 5, the radial direction from the second cylindrical portions 22 and 26, and the first seal member 10. And a third disk part 27 inserted into the groove part 30 defined by the cylindrical parts 12, 16, the first disk part 17 and the second disk part 13. In addition, at least one of the first disc portion 17, the second disc portion 13, and the third disc portion 27 is an elastic disc portion 17, accompanied by elastic deformation of the disc portion 17. The 3rd disc part 27 can be inserted in the groove part 30 (refer FIG.2 (b)). Further, the sealing device 9 is a labyrinth that allows the sealed space 6 between the inner ring 4 and the outer ring 5 to communicate with the outer space in a state where the first seal member 10 and the second seal member 20 are mounted on the inner ring 4 and the outer ring 5. A plurality of non-contact seal portions 31, 33, 35 extending in the axial direction constituting the seal 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 has a configuration in which the first elastic member 15 is fixed to the first metal core 11, and the second seal member 20 is fixed to the second metal core 21 and the second elastic member 25 is fixed to the first metal core 11. It is configured. The 1st metal core 11 and the 2nd metal core 21 are made from metal formed from metal materials, such as a stainless steel plate and cold rolled steel plate (SPCC), and are made into the ring shape by which sheet metal processing was carried out.
The first metal core 11 is fitted to the outer peripheral surface 4 b of the inner ring 4, and the metal core cylindrical portion 12 constituting the first cylindrical portion, and one side of the core metal cylindrical portion 12 in the axial direction 2 (sealed space 6 side). And a metal core disc portion 13 which is provided in an annular shape so as to project from the end portion and radially outward from the end portion, and 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。 In the cored bar part 13, the surface facing the other side (external space side) in the axial 2 direction constitutes the inner wall surface of the groove on the one side in the groove width direction (the same direction as the axial 2 direction) of the groove part 30.
The cored bar part 13 is a first non-contact sealing part that extends in the direction of the axis 2 while facing the inner peripheral surface 5b of the outer ring 5 as a part to which the front end part in the protruding direction which is the peripheral end part is opposed. 5 The non-contact seal portion 35 is formed. The projecting dimension along the radial direction of the cored bar portion 13 is such that a slight gap is formed between the tip end portion and the inner peripheral surface 5 b of the outer ring 5 in a state where the first seal member 10 is mounted on the inner ring 4. It is good also as an appropriate dimension so that the 5th non-contact seal part 35 which comprises this labyrinth seal may be formed. Further, the cored bar part 13 is configured such that a substantially uniform fifth non-contact seal part 35 is formed over the entire circumference between the tip part and the inner peripheral surface 5 b of the outer ring 5. Yes.
The first metal core 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, 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 part 12 of the first cored bar 11, an elastic cylindrical part 16 constituting the first cylindrical part, and an axis of the elastic cylindrical part 16 An elastic disc portion 17 which is connected to the other end in the other direction (external space side) in the two directions and is provided in an annular shape so as to protrude radially outward from the end portion and constitutes the first disc portion. ing. In this embodiment, when the first seal member 10 and the second seal member 20 are combined with each other so that the elastic disc portion 17 constituting the first disc portion is moved in the two axial directions, the elastic disc portion 17 is mainly elastic. It is a disc portion having elasticity to be deformed.
Further, the first elastic member 15 includes an outer end covering portion 18 provided so as to cover an end portion on the other side (external space side) in the two axial directions of the core metal cylindrical portion 12 of the first core metal 11. . In the present embodiment, the elastic disk portion 17 is provided so as to be located on one side in the axial 2 direction (on 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 core metal 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 other side (external space side) of the elastic cylindrical portion 16 in the axial direction than the elastic disc portion 17 is positioned on the axial center side (radially inner side) of the groove bottom surface. An example is shown to be provided. That is, the thickness dimension along the radial direction of the outer space side portion of the elastic cylindrical portion 16 relative to the elastic disk portion 17 is the thickness along the radial direction of the portion constituting the groove bottom surface of the groove portion 30 of the elastic cylindrical portion 16. The outer end covering portion 18 is provided so as to be smaller than the dimension and connected to the outer 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。 In the elastic disc portion 17, a surface facing the one side in the axial 2 direction (sealed space 6 side) constitutes the groove inner wall surface on the other side in the groove width direction of the groove portion 30. A groove portion 30 having both sides in the groove width direction defined by the elastic disc portion 17 and the core metal disc portion 13 and a groove bottom defined by the elastic cylindrical portion 16 is open to the outside in the radial direction, and the first The seal member 10 is provided over the entire circumference.
Further, in the present embodiment, the protruding dimension H along the radial direction from the elastic cylindrical portion 16 constituting 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 dimensions. That is, the protrusion dimension H from the groove bottom surface of the groove part 30 of the elastic disc part 17 is made smaller than the protrusion dimension from the groove bottom surface of the groove part 30 of the core metal disk part 13.
The elastic disc portion 17 is non-contact extending in the axial 2 direction so as to be opposed to the inner peripheral surface of the elastic base portion 26 of the second elastic member 25 as a portion opposed to the projecting direction front end portion serving as the peripheral end portion thereof. It is set as the structure which forms the 1st non-contact seal part 31 as a seal part. 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 mounted on the inner ring 4 and the outer ring 5. It is good also as an appropriate dimension so that the 1st non-contact seal part 31 which comprises the labyrinth seal of a slight clearance gap between inner peripheral surfaces may be formed. Further, the elastic disc portion 17 is formed with a substantially uniform first non-contact sealing portion 31 over the entire circumference between the tip portion and the inner peripheral surface of the elastic base portion 26 of the second elastic member 25. It is configured as follows. In the present embodiment, in a state where the first seal member 10 and the second seal member 20 are mounted on the inner ring 4 and the outer ring 5, the dimension along the radial direction of the first non-contact seal portion 31 and the fifth non-contact described above. The dimension along the radial direction of the seal portion 35 is configured to be 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。 Moreover, in this embodiment, the elastic disc part 17 is formed so that the cross-sectional shape seen in the circumferential direction may be axisymmetric with the center line in the biaxial direction as the axis of symmetry. In addition, the elastic disk portion 17 has a substantially square cross section when viewed in the circumferential direction. That is, the elastic disc portion 17 is formed so as to extend radially outward without being inclined in the direction of the axis 2.
The thickness dimension along the axial 2 direction of the elastic disk portion 17 is set to be smaller than the dimension along the radial direction of a third non-contact seal portion 33 described later. The thickness dimension of the elastic disc portion 17 may be an appropriate dimension from the viewpoints of elastic deformability, sealability, combination, non-separability after combination, and the like. In the illustrated example, the thickness of the elastic disc portion 17 is shown as being substantially the same as the thickness along the direction of the axis 2 of the core disc 13. It is good also as below the thickness dimension of the part 13. FIG.
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 metal core 21 is fitted to the inner peripheral surface 5 b of the outer ring 5, and the metal core cylindrical part 22 constituting the second cylindrical part, and the other axial side of the metal core cylindrical part 22 in the axial direction (external space side). And a cored bar part 23 provided in an annular shape so as to protrude from the end toward the inside in the radial direction.
The cored bar part 23 is arranged so as to overlap with the tip of the cored bar part 13 of the first seal member 10 when viewed in the direction of the axis 2.
Further, the cored bar part 23 has a first surface facing the other side in the axial direction 2 (external 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 outer end covering portion 18 of the sealing member 10 is arranged so as to be substantially flush with the surface facing the other side in the two axial directions (external space side).
The second metal core 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 the same rubber material as described 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 core metal cylindrical portion 22 of the second core metal 21, and an elastic base portion 26 constituting the second cylindrical portion, and the shaft 2 of the elastic base portion 26. An elastic disk part 27 which is connected to an end part on one side (sealed space 6 side) in the direction and is provided in an annular shape so as to protrude radially inward from the end part and constitutes a third disk part; I have.
Further, the second elastic member 25 includes an inner end covering portion 28 provided so as to cover an end portion of one side (sealed space 6 side) in the axial 2 direction of the core metal cylindrical portion 22 of the second core metal 21. ing. Further, the second elastic member 25 includes a shaft center end covering portion 29 provided so as to cover the end portion on the shaft center side of the core metal disc portion 23 of the second core metal 21. In the present embodiment, the elastic base portion 26 covers the surface of the core metal disc portion 23 of the second core metal 21 that faces the one side in the axial direction 2 (sealed space 6 side), and the shaft center end covering portion. 29 is provided so as to be connected to 29. In addition, 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 (external space side) in the two axial directions from the elastic disc portion 27 are configured 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。 In addition, the elastic disc portion 17 of the first seal member 10 described above is formed on the inner peripheral surface of the elastic base portion 26 and the axial end covering portion 29 on the other side (external space side) in the two axial directions from the elastic disc portion 27. The tip is opposed.
The elastic disk part 27 is configured to be inserted into the groove part 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 and the elastic disc portion 17 and the core metal disc portion 13 of the first seal member 10 The second non-contact seal portion 32 and the fourth non-contact seal portion 34 are formed as non-contact seal portions 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 front end portion in the protruding direction, which becomes the peripheral end portion of the elastic disc portion 27, and the elastic cylindrical portion 16 of the first seal member 10 face each other, and the shaft 2 A third non-contact seal portion 33 as a non-contact seal portion extending in the direction is formed. In other words, in a state where the elastic disc portion 27 is inserted into the groove portion 30, the second extending in the radial direction between the both sides in the axial direction 2 of the elastic disc portion 27 and the groove inner wall surfaces on both sides in the groove width direction of the groove portion 30. A non-contact seal portion 32 and a fourth non-contact seal portion 34 are formed, and a third non-contact seal portion 33 extending in the direction of the axis 2 is formed between the distal end portion of the elastic disc portion 27 and the groove bottom surface of the groove portion 30. It is set as the structure.

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 direction of the axis 2. That is, the distal end portions 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.
Moreover, the front-end | tip part of the elastic disc part 27, the elastic disc part 17 of the 1st sealing member 10, and the core metal disc part 13 are distribute | arranged so that it may mutually overlap over the perimeter seeing in the axis | shaft 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 metal disc portion 13 of the first seal member 10 have a substantially uniform cross-sectional shape over the entire circumference. It is assumed. In other words, the overlap width dimension along the radial direction of the distal 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 in the state viewed in the direction of the axis 2 is on the entire circumference. It is comprised so that it may become a substantially uniform dimension over it.

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 the present embodiment, the elastic disc portion 27 is arranged such that the elastic disc portion of the first seal member 10 is combined with the first seal member 10 and the second seal member 20 so as to move in the two axial directions. The rigidity is made larger 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. 2 (b), the elastic disc portion 27 does not substantially deform when the first seal member 10 and the second seal member 20 are combined with each other so as to move in the direction of the two axes. It may be configured. In the illustrated example, the thickness dimension T along the axis 2 direction of the elastic disk part 27 is set to a dimension about three times the thickness dimension along the axis 2 direction of the elastic disk part 17 of the first seal member 10. An example is shown. In addition, the elastic disk portion 27 is formed so that the cross-sectional shape seen in the circumferential direction is line-symmetric with the center line in the two-axis direction as the axis of symmetry. In addition, the elastic disk portion 27 has a substantially square cross section when viewed in the circumferential direction. That is, the elastic disk portion 27 is formed so as to extend toward the axial center without being inclined in the direction of the axis 2.

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。   The dimension obtained by adding the thickness dimension T of the elastic disk part 27 and the protruding dimension H of the elastic disk part 17 of the first seal member 10 is smaller than the groove width dimension W of the groove part 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 two axial directions, the elastic disk portion 27 of the second seal member 20 is combined. So that the elastic disc portion 17 of the first seal member 10 that is elastically deformed so as to be laid down can be restored, the groove width dimension W of the groove portion 30 is equal to the thickness dimension T of the elastic disc portion 27 and the first seal. The dimension is larger than the dimension obtained by adding the protruding dimension H of the elastic disk portion 17 of the member 10. In the case where the elastic disk portion 27 is formed of an elastic material as in the present embodiment, the first seal member 10 and the second seal member 20 are moved in the two axial directions. In order to prevent the elastic disc portion 17 of the first seal member 10 that is mainly elastically deformed from being bitten and lying down in a combined state, the dimensions H and T are considered in consideration of the deformation of the elastic disc portion 27. , 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 dimension T of the elastic disc part 27 and the projecting dimension from the inner peripheral surface of the elastic base part 26 are such that the first seal member 10 and the second seal member 20 are mounted on the inner ring 4 and the outer ring 5. Further, non-contact seal portions 32, 33, and 34 constituting a labyrinth seal having a slight gap shape are formed between both sides in the two axial directions of the elastic disc portion 27 and the tip portion and the inner wall surface and the groove bottom surface of the groove portion 30. It is good also as an appropriate dimension. Further, the elastic disc portion 27 is configured such that a substantially uniform second non-contact seal portion 32 is formed over the entire circumference between the elastic disc portion 27 and the elastic disc portion 17 of the first seal member 10. . The elastic disc portion 27 is configured such that a substantially non-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. Yes. The fourth non-contact seal portion 34 is also formed so as to be connected between the elastic base portion 26 and the core metal disc portion 13 that are provided so as to be continuous with the radially outer side of the elastic disc portion 27.

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。   When 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 device 9 according to the present embodiment having the above-described configuration communicates the external space with the sealed space 6. A seal is formed. In the present embodiment, the dimension along the axis 2 direction of the second non-contact seal part 32 and the dimension along the axis 2 direction of the fourth non-contact seal part 34 are configured to be substantially the same dimension. Further, the dimension along the radial direction of the third non-contact seal portion 33 and the dimension along the radial direction of the first non-contact seal portion 31 and the fifth non-contact seal portion 35 are configured to be substantially the same size. ing. Further, the dimension along the radial direction 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 axis 2 direction when viewed in the circumferential direction, and the radial direction when viewed in the circumferential direction. The dimensions of the second non-contact seal portion 32 and the fourth non-contact seal portion 34 extending in the direction of the axis 2 are substantially the same. That is, in this embodiment, the gap dimension of the labyrinth seal as viewed in the circumferential direction is substantially uniform over the entire space from the external space to the sealed space 6 except for a portion where a recess 26a described later is provided. 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 constituting the 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. The second non-contact seal portion 32 is formed so as to continue to 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 continue to the axial center side of the second non-contact seal portion 32 and to extend toward the sealed space 6 side. Further, a fourth non-contact seal portion 34 is formed so as to continue to the sealed space 6 side of the third non-contact seal portion 33 and to extend outward in the radial direction. In addition, a fifth non-contact seal portion 35 is formed so as to continue to the radially outer side of the fourth non-contact seal portion 34 and to extend toward the sealed space 6 side. Further, a fifth non-contact seal portion 35 constituting an opening of the labyrinth seal on the sealed space 6 side is formed so as to open along the inner peripheral surface 5 b 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。 Moreover, in this embodiment, it is set as the structure which provided the recessed part 26a which comprises a grease trap in the elastic base 26 of the 2nd elastic member 25. As shown in FIG. With such a configuration, a grease pool can be formed in the recess 26a, and leakage of grease to the external space can be effectively suppressed.
The recess 26 a is a core of the first seal member 10 that is on 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 recess 26a may be provided over the entire circumference in a groove shape extending in the circumferential direction, or may be provided with an interval in the circumferential direction. Further, the concave portion 26a is provided so as not to overlap 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 the grease can be received and from the viewpoint of suppressing the elastic deformation of the elastic disk portion 27. Appropriate positions and dimensions may be used. Further, the surface facing the sealed space 6 side of the inner end covering portion 28 that is radially outward from the concave portion 26a has the elastic base portion 26 and the sealed space 6 of the elastic disc portion 27 provided so as to be continuous therewith. It is set as the structure provided so that it might become substantially the same planar shape as the surface which faces the side. In the example shown in the drawing, a C chamfered chamfered portion is provided at a corner portion on the sealed space 6 side on the radially outer side of the inner end covering portion 28, and the inner end covering portion 28 excluding this chamfered portion. The surface of the elastic base portion 26 and the elastic disk 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.
Note that 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 sealing device 9 according to the present embodiment and the bearing device 1 including the sealing device 9 are configured as described above, so that the torque of the bearing device 1 can be reduced and the sealing performance can be improved. The first seal member 10 and the second seal member 20 can be easily maintained in a combined state.
In other words, the first disc part is projected to the first seal member 10 in the radial direction (in the present embodiment, radially outward) from the part of the first cylindrical parts 12 and 16 spaced apart in the axial 2 direction. (Elastic disk part) 17 and the 2nd disk part (core metal disk part) 13 are provided. Further, the second seal member 20 is provided with a third disc portion (elastic disc portion) 27 so as to protrude from the second cylindrical portions 22 and 26 in the radial direction (in the present embodiment, radially inward). It is said. Further, at least one of the elastic disk part 17, the core metal disk part 13 and the elastic disk part 27 is a disk part (elastic disk part) 17 having elasticity, and this elastic disk part. The elastic disc portion 27 can be inserted into the groove portion 30 of the first seal member 10 with 17 elastic deformation. Therefore, if 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 disk part 27 of the member 20 can be inserted into the groove part 30. As a result, the elastic disc portion 17 of the first seal member 10 and the core metal disc portion 13 are held so that the elastic disc portion 27 of the second seal member 20 is sandwiched between the first seal member 10 and the second seal member 10. The state in which the seal member 20 and the seal member 20 are combined can be maintained, and handling and assembly to the bearing device 1 can be improved. Further, the first seal member 10 and the second seal member 20 can be easily maintained in the combined state as compared with those that need to be covered with other members in the combined state or those that need caulking or the like. 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。   In addition, in a state where the first seal member 10 and the second seal member 20 are mounted on the inner member (inner ring) 4 and the outer member (outer ring) 5, the sealed space 6 and the outer space between the inner ring 4 and the outer ring 5 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 constituting a labyrinth seal that communicates with each other are alternately formed. Accordingly, since the first seal member 10 and the second seal member 20 can form a non-contact type seal, the torque of the bearing device 1 can be reduced as compared with the one having the elastically contacting seal lip. In addition, since it is difficult for deterioration due to wear or the like to occur, the service life can be extended. Further, since at least two non-contact seal portions 31, 33, 35 extending in the direction of the axis 2 and at least two non-contact seal portions 32, 34 extending in the radial direction are alternately formed, it is relatively complicated. A labyrinth seal having a simple path can be formed, 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, the elastic disc portion 27 of the second seal member 20 is inserted into the groove portion 30, and both sides in the axial direction of the elastic disc portion 27 and the elastic disc portion 17 of the first seal member 10. Further, non-contact seal portions 32 and 34 extending in the radial direction are formed facing 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 are opposed to each other to form a shaft. A non-contact seal portion 33 extending in two directions is formed. Accordingly, the two non-contact seals extending in the radial direction with the inner wall surface and the groove bottom surface in the groove width direction of the groove portion 30 of the first seal member 10 and the both side surfaces and the tip surface in the axial direction of the elastic disc portion 27 facing each other. The parts 32 and 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。   Moreover, in this embodiment, the front-end | tip part of the elastic disc part 17, the front-end | tip part of the metal core disc part 13, the inner peripheral surface of the elastic base 26 and the inner peripheral surface 5b of the outer ring | wheel 5 as a part which these oppose Are configured such that non-contact seal portions 31 and 35 extending in the direction of the axis 2 are formed. Accordingly, the tip of the cored bar part 13 to be disposed on one side of the outer space side and the sealed space 6 side is opposed to the inner peripheral surface 5b of the outer ring 5 opposed to the shaft. A non-contact seal portion 35 extending in two directions is formed. Further, the tip of the elastic disk portion 17 to be disposed on the other side of the outer space side and the sealed space 6 side is opposed to the inner peripheral surface of the elastic base portion 26 opposed to the shaft 2. 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 communicates the sealed space 6 and the external space, respectively. Thereby, the leakage of the grease filled in the sealed space 6 of the bearing device 1 to the external space can be more effectively suppressed, and dust or the like from the external space to the sealed space 6 of the bearing device 1 can be prevented. Can be more effectively suppressed.

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 the present embodiment, the protruding dimension H of the elastic disc portion 17 of the first seal member 10 from the first cylindrical portions 12 and 16 is set as the protruding size H of the core metal disc portion 13 from the first cylindrical portions 12 and 16. It is smaller than the dimensions. 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 The tip portion of the portion 27 is arranged so as to overlap each other when viewed in the direction of the axis 2. Therefore, by moving the elastic disk part 27 relatively in the axial direction from the elastic disk part 17 side where the projecting dimension H is small, both or one of the elastic disk part 17 and the elastic disk part 27 is moved. The elastic disc part 27 of the second seal member 20 can be easily inserted into the groove part 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 the present embodiment, the distal end portion of the elastic disc portion 27 of the second seal member 20 and the elastic disc portion 17 and the core metal disc portion 13 of the first seal member 10 are all viewed in the direction of the axis 2. It is set as the structure arrange | positioned so that it may mutually overlap over the periphery. Therefore, as compared with the elastic disk portion 17, the core metal disk portion 13, and the elastic disk portion 27, at least one tip portion is provided with a notch-like recess and provided with a portion that does not overlap each other. Thus, the sealing performance 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。   In this embodiment, the elastic disc portion 17 of the first seal member 10 is an elastic disc portion 17, and the groove width dimension W along the axis 2 direction of the groove portion 30 is set to the elastic disc portion 17. The projecting dimension H from the first cylindrical parts 12 and 16 and the thickness dimension T along the axis 2 direction of the elastic disk part 27 of the second seal member 20 are larger than the total dimension. Accordingly, the first seal member 10 and the second seal member 20 are relatively moved in the direction along the axial direction, and the elastic disc portion 27 is inserted into the groove portion 30 with the elastic deformation of the elastic disc portion 17. When combined, it is possible to suppress the elastic disc portion 17 from being in a fallen state. That is, if the first seal member 10 and the second seal member 20 are moved relatively in the direction along the axis 2 direction, the elastic disc portion 17 is laid down so as to be pressed against the elastic disc portion 27. However, if the elastic disc portion 27 is brought close to or in contact with the core metal disc portion 13, the elastic disc portion 27 gets over the elastic disc portion 17, and the elastic disc portion 17 Restoration 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 disc portion (elastic disc portion) 17 having elasticity is formed so that the cross-sectional shape seen in the circumferential direction is axisymmetric with the axial center line as the axis of symmetry. Yes. For example, when the disc portion 17 having elasticity is formed in a lip shape inclined in one direction in the two axial directions, or in a shape in which a concave portion or convex portion is provided on one side in the two axial directions, this disc When the member (first seal member) 10 having the portion 17 is attached to a member on the rotating side, the disc portion 17 is deformed so as to fall down due to centrifugal force or deformed so as to be raised. As a result, it is conceivable that the disc portion 17 comes into contact with the opposing portions 26 and 27. According to the above configuration, even when the disk portion 17 having elasticity is provided on the member on the rotation side, deformation due to centrifugal force can be suppressed, and the disk portion 17 and the portion 26 facing this, 27 and the non-contact sealing portions 31 and 32 can be secured.

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 illustrating an example of the sealing device according to the second embodiment.
Note that differences from the first embodiment will be mainly described, and the same components will be denoted by the same reference numerals, and description thereof will be omitted or simplified.
In addition, the sealing device 9A 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 that rotate relatively coaxially as described above. 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 this embodiment, it is set as the structure which does not provide the recessed part 26a in the elastic base 26A of 2nd elastic member 25A. That is, in this embodiment, the surface of the second seal member 20A facing the sealed space 6 side of the elastic disc portion 27, the elastic base portion 26A, and the inner end covering portion 28 is the chamfered portion of the inner end covering portion 28 described above. Except for, it is flat.
The sealing device 9A according to the present embodiment configured as described above and the bearing device 1 including the same also have the same effects as those of the first embodiment described above.

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 diagram schematically illustrating an example of the sealing device according to the third embodiment.
Note that differences from the above embodiments will be mainly described, and the same components will be denoted by the same reference numerals, and description thereof will be omitted or simplified.
Further, the sealing device 9B according to the present embodiment is also mounted on the bearing device 1 constituted by the inner ring 4 as the inner member and the outer ring 5 as the outer member that relatively rotate coaxially as described above. 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 seal 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-described 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 is configured such that a first elastic member 15A formed of the same elastic material as described above is fixed to a first cored bar 11A formed of the same metal material. The second seal member 20B has a configuration in which a second elastic member 25B formed of the same elastic material is fixed to a second cored bar 21A formed of the same metal material as described above.
The first metal core 11A is fitted to the inner peripheral surface 5b of the outer ring 5, and is connected to the metal core cylindrical portion 12A constituting the first cylindrical portion and the outer space side end of the metal core cylindrical portion 12A. 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 part 12A of the first cored bar 11A, the elastic cylindrical part 16A constituting the first cylindrical part, and the covered portion of the elastic cylindrical part 16A. An elastic disc portion 17A that is connected to the end portion on the seal space 6 side, is provided in an annular shape so as to protrude from the end portion toward the axial center side, and constitutes a first disc portion. As described above, the elastic disc portion 17A is a disc portion having elasticity that mainly undergoes elastic deformation when the first seal member 10A and the second seal member 20B are combined with each other so as to move in the two axial directions. 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 positioned on the outer space side with respect to the inner end covering portion 18A. Further, the thickness dimension along the radial direction of the portion to be sealed 6 from the elastic disc portion 17A of the elastic cylindrical portion 16A is set to the thickness along the radial direction of the portion constituting 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 smaller than the size and to be connected to the sealed space 6 side portion. Further, the inner peripheral surface of the elastic cylindrical portion 16A constituting the groove bottom surface of the groove portion 30 is provided so as to be positioned substantially coincident with the distal end surface of the core metal disc portion 13A in the radial direction.

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 direction of the axis 2 so as to face the outer peripheral surface of the second elastic member 25B as a portion opposed to the front end portion in the protruding direction serving as the peripheral end portion thereof, and on the sealed space 6 side. The fifth non-contact seal portion 35 is formed as an open non-contact seal portion. The protruding dimension H of the elastic disc portion 17A is substantially the same as described above, with the first seal member 10A and the second seal member 20B being mounted on the outer ring 5 and the inner ring 4, and the tip end portion and the second elastic member 25B. It is good also as an appropriate dimension so that the 5th non-contact seal | sticker part 35 may be formed between these outer peripheral surfaces.
In the present embodiment, the first elastic member 15A is connected to the outer space side end of the elastic cylindrical portion 16A, and is provided in an annular shape so as to protrude from the end toward the axial center side. It is set as the structure which provided the elastic disc part 19 which comprises a part. That is, in this embodiment, both the elastic disc portion 17A and the elastic disc portion 19 constituting the first disc portion and the second disc portion of the first seal member 10A are formed from an elastic material. Yes.

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 disk part 19 is provided so as to cover the tip part of the core metal disk part 13A of the first core metal 11A and to extend from the tip part of the core metal disk part 13A toward the axial center side. It 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 the elastic disc portion 19 A configuration in which a first non-contact seal portion 31 is formed as a non-contact seal portion that extends in the axial 2 direction and opens on the outer space side by the core metal cylindrical portion 22A constituting the second cylindrical portion as a portion facing this. It is said that. The protruding dimension of the elastic disk portion 19 is such that the first seal member 10A and the second seal member 20B are mounted on the outer ring 5 and the inner ring 4 and between the front end portion and the outer peripheral surface of the cored bar cylindrical portion 22A. It is good also as an appropriate dimension so that the 1st non-contact seal part 31 may be formed.
In addition, the elastic disk portion 19 is formed so that the cross-sectional shape seen in the circumferential direction is line-symmetric with the center line in the two-axis direction as the axis of symmetry. Further, the elastic disk portion 19 has a substantially square cross section when viewed in the circumferential direction. That is, the elastic disc portion 19 is formed so as to extend toward the axial center 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 projecting dimension of the elastic disc part 19 from the elastic cylindrical part 16A (groove bottom face of the groove part 30) is larger than the projecting dimension H of the elastic disc part 17A from the elastic cylindrical part 16A (groove bottom face of the groove part 30). It is said.
Moreover, the thickness dimension along the axial 2 direction of the elastic disc part 19 is made larger than the thickness dimension along the axial 2 direction of the elastic disc part 17A and the core metal disc part 13A of the first core metal 11A. . The elastic disc portion 19 is configured to be less elastically deformed than the elastic disc portion 17A, and has a greater rigidity than the elastic disc portion 17A.
Further, the elastic disk portion 19 is provided so that the surface facing the outer space side is flush with the surface facing the outer space side of the core metal disk portion 13A of the first core metal 11A. Further, the mutually facing surfaces of the elastic disc portion 19 and the elastic disc portion 17A constitute both inner wall surfaces of the groove portion 30 in the groove width direction. That is, in the present embodiment, the first elastic member 15 </ b> A is configured to partition both the groove inner wall surface and the groove bottom surface in the groove width direction of the groove portion 30. The groove 30 opens toward the radially inner side that is the opposite side to 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 connected to the cored bar cylindrical part 22A constituting the second cylindrical part and the end of the cored bar cylindrical part 22A on the sealed space 6 side, And a cored bar part 23A that is provided in an annular shape so as to protrude radially outward from the end part and constitutes a third disk part.
The core metal cylindrical portion 22A has the end surface facing the outer space side with the first seal member 10A and the second seal member 20B attached to the outer ring 5 and the inner ring 4, and the core metal disc portion 13A of the first seal member 10A. And it is set as the structure arrange | positioned so that it may become substantially the same planar shape as the surface which faces the external space side of the elastic disc part 19. As shown in FIG. In the present embodiment, the outer peripheral surface of the cored bar cylindrical portion 22A, the surface facing the outer space side of the cored bar part 23A, and the front end surface are exposed without being covered with 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 this embodiment, the cored bar part 23A is arranged so as not to overlap the cored bar part 13A of the first seal member 10A when viewed in the direction of the axis 2. Further, the core metal 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 this embodiment, the 3rd disc part inserted in the groove part 30 of 10 A of 1st seal members is made into the core metal disc part 23A formed from the metal material. Further, with the core metal disc portion 23A inserted in the groove portion 30, the inner wall surfaces of the groove on both the axial two directions of the core metal disc portion 23A and the both sides in the groove width direction of the groove portion 30 of the first seal member 10A are configured. The second non-contact seal part 32 and the fourth non-contact seal part 34 extending in the radial direction are formed so that the elastic disk part 17A and the elastic disk part 19 are opposed to each other. Further, in a state where the core metal disc portion 23A is inserted into the groove portion 30, the tip end portion of the core metal disc portion 23A and the elastic cylindrical portion 16A constituting the groove bottom surface of the groove portion 30 of the first seal member 10A are opposed to each other. Thus, the third non-contact seal portion 33 extending in the direction of the axis 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。 In general, the tip of the cored bar part 23A and the tip of the elastic disk part 17A of the first seal member 10A are arranged so as to overlap each other when viewed in the direction of the axis 2 in the same manner as described above. ing. Further, the distal 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 substantially overlap each other over the entire circumference when viewed in the direction of the axis 2 in the same manner as described above. It is set as the structure arranged like this. In general, as described above, the dimension obtained by adding the thickness dimension T of the cored bar part 23A and the protruding dimension H of the elastic disk part 17A of the first seal member 10A is the groove width dimension W of the groove part 30. Less than.
Further, the thickness T of the cored bar part 23A and the protruding dimension from the outer peripheral surface of the cored bar cylindrical part 22A are the same as described above, and the first seal member 10A and the second seal member 20B are connected to the outer ring 5 and the inner ring 4, respectively. In a mounted state, non-contact seal portions 32, 33, 34 are formed between both sides in the two axial directions of the core metal disc portion 23 </ b> A and between the tip portion and the inner wall surfaces and the groove bottom surfaces of the groove portions 30. It is good also as an appropriate dimension.

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 facing the sealed space 6 side of the base end side portion in the protruding direction of the cored bar part 23A, and the first sealing member described above. A fifth non-contact seal portion 35 is formed by the tip of the 10A elastic disc portion 17A. The second elastic member 25B forms a second cylindrical portion, and is provided in an annular shape so as to protrude from the proximal end side portion of the cored bar portion 23A toward the sealed space 6 side. The second elastic member 25B is provided so 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 axis 2 direction is such that 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 surface facing the sealed space 6 side is the first. The dimensions may be appropriate so that the elastic member 17A of the sealing member 10A is positioned closer to the sealed space 6 in the direction of the axis 2 than 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 side with the first seal member 10A and the second seal member 20B attached to the outer ring 5 and the inner ring 4 is the first seal member 10A. The inner end covering portion 18 </ b> A is substantially flush with the surface facing the sealed space 6 side. The dimension along the radial direction of the second elastic member 25B is such that the first seal member 10A and the second seal member 20B are mounted on the outer ring 5 and the inner ring 4 and the elastic disc portion of the first seal member 10A. It is good also as an appropriate dimension so that the 5th non-contact sealing part 35 may be formed between the front-end | tip parts of 17A.

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 this 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 described above. A labyrinth seal is formed. Also in this embodiment, the clearance dimension of the labyrinth seal in the state viewed in the circumferential direction is set to a substantially uniform dimension over the entire space from the external space to the sealed space 6.
Moreover, in this embodiment, the 1st non-contact seal part 31 which comprises opening of the external space side of a labyrinth seal is formed so that it may open in the inner ring | wheel 4 side rather than the said 1st Embodiment. Moreover, the 2nd non-contact seal part 32 is formed so that it may continue to the to-be-sealed space 6 side of this 1st non-contact seal part 31, and may extend toward a radial direction outer side. Further, the third non-contact seal portion 33 is formed so as to continue to the radially outer side of the second non-contact seal portion 32 and extend toward the sealed space 6 side. Further, a fourth non-contact seal portion 34 is formed so as to continue to the sealed space 6 side of the third non-contact seal portion 33 and extend toward the axial center side. In addition, a fifth non-contact seal portion 35 is formed so as to continue to 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 constituting 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 configured as described above and the bearing device 1 including the same also have the same effects as those of the first embodiment described above.

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 illustrating an example of the sealing device according to the fourth embodiment.
Note that differences from the above embodiments will be mainly described, and the same components will be denoted by the same reference numerals, and description thereof will be omitted or simplified.
In addition, the sealing device 9C 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 that rotate relatively coaxially as described above. 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 this embodiment, the first seal member 10B is attached to the outer ring 5 and the second seal member 20C is attached to the inner ring 4 as in the third embodiment. .
The first metal core 11B of the first seal member 10B is fitted to the inner peripheral surface 5b of the outer ring 5, and the metal core cylindrical part 12B constituting the first cylindrical part, and the outer space side end of the metal core cylindrical part 12B And a cored bar part 13B which is provided in an annular shape so as to protrude from the end part toward the axial center side and which constitutes the second disk part. That is, in this embodiment, unlike the said 3rd Embodiment, it is set as the structure which the core metal disc part 13B partitions a labyrinth seal like the said 1st Embodiment and 2nd Embodiment. This cored bar part 13B is opposed to the outer peripheral surface 4b of the inner ring 4 as a part opposed to the projecting direction tip part as the peripheral end part thereof, and is a first non-contact seal part extending in the axis 2 direction. The contact seal portion 31 is formed. In the example of the figure, an example is shown in which a chamfered chamfered portion is provided on the outer peripheral surface 4b of the inner ring 4 which is a portion where the tip of the cored bar portion 13B is opposed. It is not restricted to an aspect.
Further, the projecting dimension along the radial direction of the cored bar part 13B is such that the first non-sticking portion 10B is between the front end part and the outer peripheral surface 4b of the inner ring 4 in a state where the first seal member 10B is mounted on the outer ring 5. It is good also as an appropriate dimension so that the contact seal part 31 may be 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 part 12B of the first cored bar 11B, and the elastic cylindrical part 16B constituting the first cylindrical part, An elastic disc portion 17B that is connected to the sealed space 6 side end portion of the elastic cylindrical portion 16B, is provided in an annular shape so as to protrude toward the axial center side from the end portion, and constitutes the first disc portion. I have. 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. In the present embodiment, the elastic disc portion 17B is provided so as to protrude toward the axial center from the end portion of the elastic cylindrical portion 16B on the sealed space 6 side and the inner end covering portion 18B. The surface of the inner end covering portion 18B facing the sealed space 6 side and the surface of the elastic disc portion 17B facing the sealed space 6 side are flush with each other.
The elastic disc portion 17B extends in the axial 2 direction so as to face the outer peripheral surface of the elastic base portion 26B of the second elastic member 25C as a portion opposed to the projecting direction front end portion serving as the peripheral end portion thereof, and to be sealed. The fifth non-contact seal portion 35 is formed as a non-contact seal portion that opens on the space 6 side. The protruding dimensions of the elastic disc portion 17B are substantially the same as described above, with the first seal member 10B and the second seal member 20C being attached to the outer ring 5 and the inner ring 4, and the tip of the elastic disc portion 17B and the second elastic member 25C. It is good also as an appropriate dimension so that the 5th non-contact seal part 35 may be formed between the outer peripheral surfaces of elastic base part 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 metal core 21B of the second seal member 20C is fitted to the outer peripheral surface 4b of the inner ring 4, and the metal core cylindrical part 22B constituting the second cylindrical part, and the sealed space 6 side of the metal core cylindrical part 22B A cored bar part 23 </ b> B provided in an annular shape so as to be continuous with the end part and project outward from the end part in the radial direction. The core metal disc portion 23B has an elastic circle whose surface facing the sealed space 6 side is the elastic circle of the first seal member 10B in a state where the first seal member 10B and the second seal member 20C are mounted on the outer ring 5 and the inner ring 4. The plate portion 17B is arranged so as to be substantially flush with the surface 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 core metal cylindrical portion 22B of the second core metal 21B and the surface facing the outer space side of the core metal disc portion 23B. An elastic base portion 26B constituting the second cylindrical portion and an outer space side end portion of the elastic base portion 26B are provided in an annular shape so as to protrude radially outward from the end portion, and the third disc portion is The elastic disk part 27A which comprises is provided. In addition, the second elastic member 25C includes an outer end covering portion 28A provided so as to cover the outer space side end portion of the core metal cylindrical portion 22B of the second core metal 21B. The second elastic member 25C includes a tip covering portion 29A 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 so that the surface facing the outer space side is flush with the surface facing the outer space side of the outer end covering portion 28A. The elastic base 26B is provided so that the outer peripheral surface 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 embodiment and the second embodiment. The distal end portion of the elastic disc portion 17B of the first seal member 10B described above is opposed to the outer peripheral surface of the elastic base portion 26B and the distal end covering portion 29A closer to the sealed space 6 than the elastic disc portion 27A. The elastic disk portion 27A is provided such that the surface facing the outer space side is located slightly closer to the sealed space 6 side than the surfaces facing the outer space side of the elastic base portion 26B and the outer end covering portion 28A. Yes. In a state where the elastic disk portion 27A is inserted into the groove portion 30, generally in the radial direction between the both sides of the elastic disk portion 27A in the two axial directions and the groove inner wall surfaces on both sides in the groove width direction. A second non-contact seal portion 32 and a fourth non-contact seal portion 34 that extend in the direction of the axis, and a third non-contact seal portion that extends in the direction of the axis 2 between the distal end portion of the elastic disc portion 27A and the groove bottom surface of the groove portion 30. 33 is formed. The second non-contact seal portion 32 is also formed so as to be connected between the elastic base portion 26B provided to be continuous with the axial center side of the elastic disk portion 27A and the core metal disk 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, when the elastic disc portion 27A is combined with the first seal member 10B and the second seal member 20C so as to move in the direction of the axis 2 with respect to each other, the elastic disk portion 27A has an elasticity that is mainly elastically deformed. The disc portion is configured (see FIG. 6B). The thickness dimension of the elastic disk portion 27A along the axis 2 direction is smaller than the dimension of the fifth non-contact seal portion 35 along the radial direction.
Further, when the elastic disc portion 17B of the first seal member 10B described above is combined with the first seal member 10B and the second seal member 20C so as to move in the two axial directions, the second seal member 20C The rigidity is made larger than that of the elastic disk portion 27A of the second seal member 20C so that it is less likely to be elastically deformed than the elastic disk portion 27A.
In the present embodiment, the protruding dimension H1 of the elastic disk part 27A is smaller than the groove width dimension W of the groove part 30. That is, generally in the same manner as described above, as shown in FIG. 6B, when the first seal member 10B and the second seal member 20C are combined with each other so as to move in the direction of the axis 2, the first seal member 10B The groove width dimension W of the groove part 30 is set to the protrusion dimension H1 of the elastic disk part 27A so that the elastic disk part 27A of the second seal member 20C that is elastically deformed so as to be laid down by the elastic disk part 17B can be restored. Is greater than. When the elastic disc portion 17B of the first seal member 10B is formed of an elastic material as in the present embodiment, the elastic disc portion of the first seal member 10B is substantially the same as described 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-described configuration, the outer space and the sealed space 6 are substantially the same as described above if the first seal member 10B and the second seal member 20C are attached to the outer ring 5 and the inner ring 4. A labyrinth seal is formed. Also in this embodiment, the clearance dimension of the labyrinth seal in the state viewed in the circumferential direction is set to a substantially uniform dimension over the entire space from the external space to the sealed space 6. In the illustrated example, the gap size 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. The example which made it slightly smaller than the clearance gap size of the 2nd non-contact seal part 32 made is shown.
Moreover, in this embodiment, the 1st non-contact seal part 31 which comprises the opening by the side of the external space of a labyrinth seal is formed so that it may open along the outer peripheral surface 4b of the inner ring | wheel 4. Further, the non-contact seal portions 32, 33, 34, and 35 other than the first non-contact seal portion 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 same also have the same effects as the first embodiment described above.

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 illustrating an example of the sealing device according to the fifth embodiment.
Note that differences from the above embodiments will be mainly described, and the same components will be denoted by the same reference numerals, and description thereof will be omitted or simplified.
Further, 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 are relatively coaxially rotated, as described above. 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 seal member 10C is attached to the outer ring 5 and the second seal member 20D is attached to the inner ring 4 as in the third embodiment. .
Further, in the present embodiment, as in the third embodiment, the inner peripheral surface of the core metal cylindrical portion 12C and the second disk portion constituting the first cylindrical portion of the first core metal 11C of the first seal member 10C. The first elastic member 15C is provided so as to cover the surface facing the sealed space 6 side of the cored bar part 13C constituting the. Also in the present embodiment, the first elastic member 15C is connected to the sealed space 6 side end of the elastic cylindrical portion 16C constituting the first cylindrical portion, and the covered portion of the core metal cylindrical portion 12C of the first core metal 11C. An inner end covering portion 18C provided to cover the end portion on the seal space 6 side is provided. In the present embodiment, the elastic disc portion 17C constituting the first disc portion is provided so as to protrude from the end portion on the sealed space 6 side of the inner end covering portion 18C toward the axial center side. Yes. 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。 In addition, the elastic disc portion 17C has elasticity that is mainly elastically deformed when the first seal member 10C and the second seal member 20D are combined with each other so as to move in the two axial directions as in the third embodiment. The disk part which it has is comprised (refer FIG.7 (b)). Moreover, in this embodiment, it is set as the structure by which a non-contact seal part is not formed by the front-end | tip part of this elastic disc part 17C, and the site | part which this opposes. That is, it is set as the structure by which the opposing object which comprises a non-contact seal part is not distribute | arranged to the front side of the front-end | tip part of the elastic disc part 17C.
Moreover, it is set as the structure which provided 19 A of elastic disc parts which comprise a 2nd disc part with the core metal disc part 13C in the 1st elastic member 15C. The elastic disc portion 19A is connected to the outer space side end of the elastic cylindrical portion 16C, and is provided so as to cover the surface and the tip portion of the core metal disc portion 13C facing the sealed space 6 side. In general, as in the third embodiment, the distal end portion of the elastic disc portion 19A and the cored bar cylindrical portion 22C constituting the second cylindrical portion as a portion facing the elastic disc portion 19A extend in the direction of the axis 2 to provide external space. It is set as the structure which forms the 1st non-contact seal part 31 opened in the side. Further, in the present embodiment, the external space side portion of the distal end portion of the elastic disc portion 19A is protruded toward the axial center side from the sealed space 6 side portion. That is, a step 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 configured only by the second cored bar 21C. That is, the second sealing member 20D is not provided with the second elastic member.
The second metal core 21C is fitted to the outer peripheral surface 4b of the inner ring 4 in substantially the same manner as in the third embodiment, and the metal core cylindrical part 22C constituting the second cylindrical part, and the covered metal of the metal core cylindrical part 22C. It is connected to the seal space 6 side end portion, and is provided in an annular shape so as to protrude radially outward from the end portion, and includes a core metal disc portion 23 </ b> C constituting a third disc portion.
The core metal disc portion 23C is configured to be inserted into the groove portion 30 of the first seal member 10C in substantially the same manner as described above. In a state where the core metal disc portion 23C is inserted into the groove portion 30, generally between the both sides of the core metal disc portion 23C in the two axial directions of the core metal disc portion 23C and the groove inner wall surfaces on both sides of the groove width direction of the groove portion 30. A second non-contact seal portion 32 and a fourth non-contact seal portion 34 that extend in the radial direction are formed, and a third non-contact that extends in the direction of the axis 2 between the distal end portion of the core metal disc portion 23C and the groove bottom surface of the groove portion 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 described above. A labyrinth seal is formed. In the present embodiment, as described above, a step portion is provided at the tip of the elastic disc portion 19A, and the dimension along the radial direction of the sealed space 6 side portion of the first non-contact seal portion 31 is the first. 1 It is set as the structure which becomes larger than the dimension in alignment with the radial direction of the external space side site | part of the non-contact seal part 31. FIG. Further, the dimension along the radial direction of the external space side portion of the first non-contact seal portion 31, the dimension along the axis 2 direction of the second non-contact seal portion 32, and the dimension along the radial direction of the third non-contact seal portion 33. 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. Moreover, in this embodiment, the labyrinth seal of the path | route substantially the same as the said 3rd Embodiment is formed except the 5th non-contact seal | sticker part being formed. That is, in this embodiment, the opening (fourth non-contact seal portion 34) of the labyrinth seal on the sealed space 6 side is configured to open in the radial direction (inward in the radial direction) instead of in the direction of the axis 2.
The sealing device 9D according to the present embodiment configured as described above and the bearing device 1 including the same also have the same effects as those of the first embodiment described above.

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。 In addition, you may make it apply the structure which mutually differs in the sealing apparatuses 9 and 9A-9D which concern on each said embodiment by combining suitably or combining.
In each of the above embodiments, the elastic disk parts 17, 17A, 17B, and 17C constituting the first disk part, the elastic disk part 19 constituting the second disk part, and the third disk part are constituted. Although the example which made the cross-sectional shape seen in the circumferential direction of the elastic disk parts 27 and 27A to perform the substantially rectangular shape is shown, it is not restricted to such an aspect. For example, the elastic disk portions 17, 17A, 17B, 17C, 19, 27, and 27A have a triangular shape so that the cross-sectional shape viewed in the circumferential direction is axisymmetric with the center line in the two-axis direction as the symmetry axis. Alternatively, it may be in the shape of an isosceles trapezoid or the like, or in a shape in which concave portions and protrusions are provided symmetrically on both sides in the axial direction.
In addition, the first seal member 10, 10 </ b> A to 10 </ b> C and the second seal member 20, 20 </ b> A to 20 </ b> D do not have a substantially uniform cross-sectional shape over the entire circumference, for example, an elastic circle constituting the first disc portion. Plate parts 17, 17A, 17B, 17C, cored metal disk parts 13, 13B, 13C and elastic disk parts 19, 19A constituting the second disk part, and elastic disk parts constituting the third disk part 27, 27A and at least one of the core metal disk parts 23A, 23C may be provided with a notch-like recess or the like in a part of the circumferential direction.

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。   Moreover, in each said embodiment, 1st disc part 17,17A, 17B, 17C, 2nd disc part 13,13B, 13C, 19,19A and 3rd disc part 27,27A, 23A, 23C An example in which at least one of the disk parts includes a disk part made of a metal material is shown, but instead of such an embodiment, the first disk part and the second disk part are shown. All of the part and the third disk part may be formed of an elastic material. The specific configurations of the first seal members 10, 10 </ b> A to 10 </ b> C and the second seal members 20, 20 </ b> A to 20 </ b> D that constitute the seal devices 9 and 9 </ b> A to 9 </ b> D according to the above embodiments are not limited to the above examples, 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 Sealed space 9, 9A to 9D Sealing device 10, 10A to 10C First seal member 12, 12A to 12C Core metal cylindrical part (first cylindrical part)
13, 13B, 13C Core metal disc part (second disc part)
16, 16A-16C Elastic cylindrical part (first cylindrical part)
17, 17A-17C Elastic disc part (1st disc part)
19, 19A Elastic disc part (second disc part)
20, 20A to 20D Second seal member 22, 22A to 22C Core metal cylindrical part (second cylindrical part)
23A, 23C Core metal disc part (third disc part)
25B 2nd elastic member (2nd cylindrical part)
26, 26A, 26B Elastic base (second cylindrical part)
27, 27A Elastic disc part (third disc part)
30 Groove portion 31 First non-contact seal portion (non-contact seal portion extending in the axial direction)
32 2nd non-contact seal part (non-contact seal part extended in radial direction)
33 3rd non-contact seal part (non-contact seal part extended in an axial direction)
34 4th non-contact seal part (non-contact seal part extended in radial direction)
35 fifth non-contact seal portion (non-contact seal portion extending in the axial direction)
H Projection dimension of the first disk part T Thickness dimension of the third disk part W Groove width dimension of the groove part

Claims (8)

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、前記第２円板部及び前記第３円板部のうちの少なくとも一つ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いることを特徴とするシール装置。 A first seal member attached to one of the inner member and the outer member that rotate relatively coaxially and a second seal member attached to the other member;
The first seal member is provided so as to protrude in a radial direction from a first cylindrical portion fitted to the one member and a portion spaced in the axial direction of the first cylindrical portion. A second circular plate portion and a second circular plate portion, and the second seal member projects from the second cylindrical portion in a radial direction. And a third disc portion inserted into a groove defined by the first cylindrical portion, the first disc portion and the second disc portion of the first seal member,
At least one of the first disc portion, the second disc portion, and the third disc portion is an elastic disc portion, and the third circle is accompanied by elastic deformation of the disc portion. The plate part can be inserted into the groove part,
A labyrinth seal that communicates a sealed space between the inner member and the outer member and 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 sealing device characterized in that 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. 請求項１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 claim 1,
In a state where the third disc portion is inserted into the groove portion, both axial sides of the third disc portion and the first disc portion and the second disc portion face each other and extend in the radial direction. A non-contact seal portion is formed, and a non-contact seal portion extending in the axial direction is formed such that a peripheral end portion of the third disc portion and the first cylindrical portion are opposed to each other. A sealing device. 請求項１または２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 claim 1 or 2,
The peripheral end portion of the first disc portion and the peripheral end portion of the second disc portion are opposed to a portion where they face each other to form a non-contact seal portion extending in the axial direction. A sealing device. 請求項１乃至３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円板部及び前記第３円板部のうちの少なくとも一つが前記弾性を有した円板部とされ、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 Claims 1 thru | or 3,
The projecting dimension from the first cylindrical part of the first disk part is smaller than the projecting dimension of the second disk part from the first cylindrical part,
At least one of the first disc portion and the third disc portion is a disc portion having the elasticity, and a peripheral end portion of the first disc portion and a peripheral end of the third disc portion The sealing device is characterized in that the portions are arranged so as to overlap each other when viewed in the axial direction. 請求項１乃至４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 Claims 1 thru | or 4,
The peripheral end portion of the third disc portion, 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. A sealing device characterized by the above. 請求項１乃至５のいずれか１項において、
前記第１円板部が前記弾性を有した円板部とされており、
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。 In any one of Claims 1 thru | or 5,
The first disc portion is a disc portion having the elasticity;
The groove width dimension along the axial direction of the groove part is a dimension obtained by adding the projecting dimension of the first disk part from the first cylindrical part and the thickness dimension along the axial direction of the third disk part. A sealing device characterized in that it is also large. 請求項１乃至６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 6,
The sealing device according to claim 1, wherein the disk portion having elasticity is formed so that a cross-sectional shape viewed in the circumferential direction is axisymmetric with an axial center line 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７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 rotate relatively coaxially, and the seal device according to any one of claims 1 to 7 attached thereto.

Images