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JP2015052350A - Bearing seal - Google Patents

Bearing seal Download PDF

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Publication number
JP2015052350A
JP2015052350A JP2013185405A JP2013185405A JP2015052350A JP 2015052350 A JP2015052350 A JP 2015052350A JP 2013185405 A JP2013185405 A JP 2013185405A JP 2013185405 A JP2013185405 A JP 2013185405A JP 2015052350 A JP2015052350 A JP 2015052350A
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Japan
Prior art keywords
flange
bearing
lip
diameter side
annular
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Pending
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JP2013185405A
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Japanese (ja)
Inventor
孝明 上池
Takaaki Kamiike
孝明 上池
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Uchiyama Manufacturing Corp
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Uchiyama Manufacturing Corp
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Priority to JP2013185405A priority Critical patent/JP2015052350A/en
Publication of JP2015052350A publication Critical patent/JP2015052350A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/80—Labyrinth sealings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a bearing seal capable of restricting immersion of drilling mud from a flange surface into a bearing space while its structure being simple and realizing reduction of a running torque.SOLUTION: This invention relates to a bearing seal 8 installed between a hub-flange side inner race 5 and an outer race 2 in a bearing 1 in which the inner race 5 with a hub flange is supported in an axis-rotatable manner in respect to the outer race 2, the bearing seal comprising: a slinger member 9 made of stainless metallic material including a fitting cylindrical part 10 fitted to a cylindrical part 34 formed concentrically and in a stepped manner at a hub-flange 32 in respect to the inner race 5 and a flange part 11 extended out from one end part 10a of the fitted cylindrical part 10 at inner diameter side along a flange surface 32a of the hub-flange 32 and its inner diameter side extremity end side 11a being non-contacted to the inner race 5; a core 12 fitted to the outer race 2; and a seal lip member 20 made of elastic material that is fixed to the core 12 and having at least one annular seal lip 20a resiliently contacted with the flange part 11 of the slinger member 9.

Description

本発明は、例えば、自動車等の車輪支持部の軸受装置に用いられる軸受密封装置に関し、さらに詳しくは、外輪に対してハブフランジ付内輪が軸回転可能に支持される軸受装置のハブフランジ側内輪と外輪との間に装着される軸受密封装置に関する。   The present invention relates to a bearing sealing device used for a bearing device of a wheel support portion of, for example, an automobile, and more specifically, to a hub flange side inner ring of a bearing device in which an inner ring with a hub flange is rotatably supported with respect to an outer ring. The present invention relates to a bearing sealing device mounted between the outer ring and the outer ring.

近時、自動車等の車輪支持部の軸受装置としては、ハブベアリングが多く用いられるようになった（例えば、特許文献１〜４参照）。このハブベアリングは、車体に固定される外輪に対して、車輪が取付けられるハブフランジ付内輪が軸回転可能に支持されるよう構成される。そして、外輪と内輪との軸方向両端部には、軸受空間への泥水等の浸入を防止し、或いは軸受空間に充填されるグリース等の漏出を防止するための密封装置が装着される。特許文献１に示される車輪用軸受装置におけるハブフランジ側（アウター側）の密封装置は、外輪の内径部に嵌合される芯金と、該芯金に固着され、ハブフランジの立上面を含むフランジ面に弾接する複数のシールリップ部を有する弾性部材（シールリップ部材）とからなる。このように構成されるアウター側の密封装置の場合、ハブフランジのフランジ面は、泥水に晒されるため錆が発生し易く、内輪の回転に伴いフランジ面に弾性的に摺接するシールリップ部は、錆の発生したフランジ面に摺接するため、摺接面が経時的に摩耗する。これによって、密封装置の所期のシール性能が早期に低下することがある。そのため、特許文献２〜４に開示されたアウター側密封装置では、シールリップ部をフランジ面に直接弾接させず、内輪に嵌合されハブフランジの立上部からフランジ面に沿うよう装着された不錆性金属材からなるスリンガ部材（スリンガ、金属環等）にシールリップ部を弾接させるよう構成されている。   Recently, as a bearing device for a wheel support portion of an automobile or the like, a hub bearing is often used (for example, see Patent Documents 1 to 4). The hub bearing is configured such that an inner ring with a hub flange to which a wheel is attached is rotatably supported with respect to an outer ring fixed to the vehicle body. Sealing devices for preventing intrusion of muddy water or the like into the bearing space or leakage of grease or the like filled in the bearing space are attached to both axial ends of the outer ring and the inner ring. A hub flange side (outer side) sealing device in a wheel bearing device disclosed in Patent Document 1 includes a core metal fitted to an inner diameter portion of an outer ring, and a vertical surface of the hub flange fixed to the core metal. It consists of an elastic member (seal lip member) having a plurality of seal lip portions that elastically contact the flange surface. In the case of the outer side sealing device configured as described above, the flange surface of the hub flange is easily exposed to muddy water, so that rust is likely to be generated, and the seal lip portion that elastically slides on the flange surface as the inner ring rotates, Since the slidable contact with the flange surface where rust occurs, the slidable contact surface wears over time. As a result, the expected sealing performance of the sealing device may deteriorate early. For this reason, in the outer side sealing devices disclosed in Patent Documents 2 to 4, the seal lip portion is not directly elastically contacted with the flange surface, but is fitted to the inner ring and mounted from the upright portion of the hub flange along the flange surface. The seal lip portion is configured to elastically contact a slinger member (slinger, metal ring, etc.) made of a rust metal material.

ところで、特許文献２〜４に記載された密封装置の場合、いずれも、スリンガ部材は内輪の外径部に嵌合される円筒部と、この円筒部の一端部からハブフランジのフランジ面に沿うよう外径側に延出された鍔部とから構成される。このような構造のスリンガ部材の場合、鍔部とフランジ面との隙間に泥水が浸入してスリンガ部材と内輪との嵌合部に至り、これにより内輪の嵌合面が錆びてスリンガ部材との嵌合強度が低下する事態も生じる。さらには、嵌合面の錆の進行に伴い泥水が軸受空間内に浸入することにもなり、密封装置としての本来のシール機能がこの嵌合部から維持できなくなる事態に至ることもある。そのため、特許文献２では、スリンガ部材の鍔部とフランジ面との間に弾性材製シール部材を弾装して、スリンガ部材の鍔部とフランジ面との隙間への泥水の浸入を防止している。また、特許文献３及び特許文献４でも、同様のシール部材によりスリンガ部材の鍔部とフランジ面との隙間への泥水の浸入防止措置を講じる例が記載されている。さらに、特許文献４では、その図５に、フランジ面に形成される環状凸部に嵌合される第２の嵌合部を有し、内輪（ハブ）に嵌合される第１の嵌合部と共に、スリンガ部材を内輪に固定する例も記載されている。   By the way, in the case of the sealing devices described in Patent Documents 2 to 4, the slinger member has a cylindrical portion fitted to the outer diameter portion of the inner ring and a flange surface of the hub flange from one end portion of the cylindrical portion. It is comprised from the collar part extended to the outer-diameter side. In the case of a slinger member having such a structure, muddy water enters the gap between the flange portion and the flange surface, leading to a fitting portion between the slinger member and the inner ring, which causes the fitting surface of the inner ring to rust and contact the slinger member. There also occurs a situation where the fitting strength decreases. Furthermore, muddy water may enter the bearing space with the progress of rust on the fitting surface, and the original sealing function as the sealing device may not be maintained from the fitting portion. Therefore, in Patent Document 2, a sealing member made of an elastic material is mounted between the flange portion of the slinger member and the flange surface to prevent the intrusion of muddy water into the gap between the flange portion of the slinger member and the flange surface. Yes. Patent Document 3 and Patent Document 4 also describe examples in which the same sealing member is used to take measures to prevent muddy water from entering the gap between the flange portion and the flange portion of the slinger member. Furthermore, in patent document 4, it has the 2nd fitting part fitted to the cyclic | annular convex part formed in the flange surface in FIG. 5, and the 1st fitting fitted to an inner ring (hub) is carried out. The example which fixes a slinger member to an inner ring with the part is also described.

特開２００４−１００８８７号公報JP 2004-100877 A 特開２００６−１３２６８４号公報JP 2006-132684 A 特許第４３７１４２９号公報Japanese Patent No. 4371429 特許第４４７９３６２号公報Japanese Patent No. 4479362

しかしながら、前記特許文献２〜４におけるシール部材によるスリンガ部材の鍔部とフランジ面との隙間への泥水の浸入防止措置は、シール部材の存在を必須とする。シール部材がないと、スリンガ部材の鍔部とフランジ面との隙間に泥水が浸入し、内径側に位置するスリンガ部材と内輪との金属同士の嵌合部に泥水が至ってしまうからである。また、特許文献４に記載された２つの嵌合部によりスリンガ部材を内輪に固定する例は、同心的に２つの嵌合部を有するスリンガ部材を板金加工によって精度良く作製することが難しいと考えられる。そのため、一方の嵌合部に歪が生じて両者の安定した嵌合状態が得られなくことが予想される。そして、これら特許文献２〜４においては、密封装置の本来の機能を発揮させるために、複数のシールリップをスリンガ部材に摺接させる必要があり、これがこの種の密封装置において、内輪の回転トルクを下げ難くしている一要因になっていることは否めなかった   However, the measures for preventing intrusion of muddy water into the gap between the flange portion of the slinger member and the flange surface by the seal member in Patent Documents 2 to 4 require the presence of the seal member. This is because if there is no seal member, muddy water enters the gap between the flange of the slinger member and the flange surface, and the muddy water reaches the fitting portion between the slinger member and the inner ring located on the inner diameter side. Moreover, the example which fixes a slinger member to an inner ring | wheel with two fitting parts described in patent document 4 thinks that it is difficult to produce the slinger member which has two fitting parts concentrically with sheet metal processing accurately. It is done. For this reason, it is expected that one fitting portion is distorted and a stable fitting state between the two cannot be obtained. And in these patent documents 2-4, in order to exhibit the original function of a sealing device, it is necessary to make a some seal lip slidably contact with a slinger member, and this is a rotation torque of an inner ring in this kind of sealing device. It was undeniable that it was one factor that made it difficult to lower

本発明は、上記実情に鑑みなされたものであり、外輪に対してハブフランジ付内輪が軸回転可能に支持される軸受装置において、簡単な構造でありながら、フランジ面からの軸受空間内への泥水の浸入を抑え、回転トルクの低減化を実現することができる軸受密封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 in a bearing device in which an inner ring with a hub flange is supported so as to be axially rotatable with respect to an outer ring, the bearing surface from the flange surface into the bearing space is simple in structure. An object of the present invention is to provide a bearing sealing device capable of suppressing the intrusion of muddy water and realizing a reduction in rotational torque.

本発明に係る軸受密封装置は、外輪に対してハブフランジ付内輪が軸回転可能に支持される軸受装置におけるハブフランジ側内輪と外輪との間に装着される軸受密封装置であって、前記ハブフランジに前記内輪と同心且つ段状に形成された円筒部に嵌合される嵌合円筒部と、該嵌合円筒部の一端部より前記ハブフランジのフランジ面に沿って内径側に延出されると共に、その内径側先側部が前記内輪に非接触の状態とされた鍔部とを備える不錆性金属材からなるスリンガ部材と、前記外輪に嵌合される芯金と、前記芯金に固着され、前記スリンガ部材の鍔部に弾接する少なくとも１個の環状シールリップを備える弾性体製のシールリップ部材とからなることを特徴とする。   A bearing sealing device according to the present invention is a bearing sealing device that is mounted between a hub flange side inner ring and an outer ring in a bearing device in which an inner ring with a hub flange is rotatably supported with respect to an outer ring. A fitting cylindrical portion fitted to a cylindrical portion formed concentrically and stepwise with the inner ring on the flange, and extends from one end of the fitting cylindrical portion to the inner diameter side along the flange surface of the hub flange. In addition, a slinger member made of a non-rusting metal material provided with a flange portion whose inner diameter side front side portion is in a non-contact state with the inner ring, a core metal fitted to the outer ring, and the core metal It comprises an elastic seal lip member having at least one annular seal lip that is fixed and elastically contacts the flange of the slinger member.

本発明によれば、スリンガ部材の外径側に位置する嵌合円筒部とハブフランジに形成される円筒部との嵌合により、嵌合部から内径側のフランジ面とスリンガ部材の鍔部との間に泥水が浸入することが抑えられる。また、スリンガ部材の鍔部に対して、シールリップ部材の少なくとも１個の環状シールリップが弾接しているから、この部分から軸受装置内への泥水の浸入が防止される。しかも、スリンガ部材は不錆性金属材からなるから、スリンガ部材の表面が錆びることなく、この表面を摺接する環状シールリップが摺接面の錆びによって摩耗して、早期にシール性が低下することがない。さらに、スリンガ部材における鍔部の内径側先側部は内輪に非接触の状態とされているから、シールリップ部材との間でラビリンス構造を構成し易く、これによってスリンガ部材に摺接するシールリップを少なくすることができ、内輪の回転トルクの低減化に寄与する。   According to the present invention, by fitting the fitting cylindrical portion located on the outer diameter side of the slinger member and the cylindrical portion formed on the hub flange, the flange surface on the inner diameter side from the fitting portion and the flange portion of the slinger member Intrusion of muddy water during the period is suppressed. Further, since at least one annular seal lip of the seal lip member is in elastic contact with the flange portion of the slinger member, entry of muddy water from this portion into the bearing device is prevented. In addition, since the slinger member is made of a non-rusting metal material, the surface of the slinger member does not rust, and the annular seal lip that slidably contacts this surface wears due to rust on the slidable contact surface, resulting in early deterioration of the sealing performance. There is no. Furthermore, since the inner diameter side front side portion of the flange portion of the slinger member is not in contact with the inner ring, a labyrinth structure can be easily formed with the seal lip member. This can be reduced and contributes to a reduction in the rotational torque of the inner ring.

本発明において、前記シールリップ部材は、前記環状シールリップより内径側にさらに環状シールリップを有し、前記スリンガ部材における鍔部の内径側先側部は、当該内径側の環状シールリップとラビリンス構造を形成するようにしても良い。
本発明によれば、内径側の環状シールリップと、スリンガ部材の鍔部の内径側先側部との間にラビリンス構造が形成されているから、この内径側の環状シールリップより外径側にあってスリンガ部材の鍔部に弾接する環状シールリップと、このラビリンス構造とによって、内輪の回転トルクの増大を招くことなく、泥水の軸受装置内への浸入防止機能をより向上させることができる。 In the present invention, the seal lip member further has an annular seal lip on the inner diameter side of the annular seal lip, and the inner diameter side front side portion of the flange portion of the slinger member has an annular seal lip and a labyrinth structure on the inner diameter side. May be formed.
According to the present invention, since the labyrinth structure is formed between the inner diameter side annular seal lip and the inner diameter side front side portion of the flange portion of the slinger member, the inner diameter side annular seal lip is arranged on the outer diameter side. Thus, the function of preventing the intrusion of muddy water into the bearing device can be further improved without causing an increase in the rotational torque of the inner ring by the annular seal lip that elastically contacts the flange portion of the slinger member and the labyrinth structure.

本発明において、前記スリンガ部材における嵌合円筒部の他端部は、前記ハブフランジに密着する弾性シール部材で覆われているようにしても良い。
本発明によれば、スリンガ部材における嵌合円筒部の他端部が、ハブフランジに密着する弾性シール部材で覆われているから、スリンガ部材の嵌合円筒部とハブフランジの円筒部との嵌合部への泥水の浸入をより確実に防止することができる。 In the present invention, the other end of the fitting cylindrical portion of the slinger member may be covered with an elastic seal member that is in close contact with the hub flange.
According to the present invention, since the other end portion of the fitting cylindrical portion of the slinger member is covered with the elastic seal member that is in close contact with the hub flange, the fitting cylindrical portion of the slinger member and the cylindrical portion of the hub flange are fitted. Infiltration of muddy water into the joint can be prevented more reliably.

本発明において、前記シールリップ部材は、前記外輪より外径側に突出する庇状部を備え、前記スリンガ部材は当該庇状部に向く環状突部を備え、前記庇状部は当該環状突部とラビリンス構造を形成する環状リップを有しているものとしても良い。
本発明によれば、スリンガ部材が備える環状突部と、シールリップ部材の庇状部が有する環状リップとによりラビリンス構造が構成されるから、このラビリンス構造と、スリンガ部材の鍔部に弾接する環状シールリップとにより、軸受装置内への泥水の浸入防止機能が一層向上する。しかも、このような浸入防止機能の向上は、ラビリンス構造との相乗作用によってなされるから、浸入防止機能の向上を図りながらも内輪の回転トルクを低く抑えることができる。 In the present invention, the seal lip member includes a flange-shaped portion that protrudes to the outer diameter side from the outer ring, the slinger member includes an annular protrusion that faces the flange-shaped portion, and the flange-shaped portion corresponds to the annular protrusion. And an annular lip forming a labyrinth structure.
According to the present invention, since the labyrinth structure is constituted by the annular protrusion provided in the slinger member and the annular lip of the flange portion of the seal lip member, the labyrinth structure and the annular contact elastically with the flange portion of the slinger member The sealing lip further improves the function of preventing muddy water from entering the bearing device. In addition, since such an intrusion prevention function is improved by a synergistic action with the labyrinth structure, the rotational torque of the inner ring can be kept low while improving the intrusion prevention function.

この場合、前記スリンガ部材の外径側部分に弾性シール部材が固着され、前記環状突部は、当該弾性シール部材から前記シールリップ部材の庇状部に向くよう形成された環状リップからなるものであっても良い。
これによれば、スリンガ部材が備える環状突部としての環状リップと、シールリップ部材の庇状部が有する環状リップとによりラビリンス構造が構成されるから、このラビリンス構造と、スリンガ部材の鍔部に弾接する環状シールリップとにより、前記と同様に軸受装置内への泥水の浸入防止機能が有効に発揮され、内輪の回転トルクの低減化にも寄与する。
また、前記環状突部は、前記スリンガ部材の嵌合円筒部を前記一端部から外輪側に向け張り出すように延長し且つ折り返すように形成された張出部からなり、前記鍔部はこの張出部に連続して形成されているものとしても良い。
これによれば、スリンガ部材が備える環状突部としての張出部が前記と同様の機能を奏する。 In this case, an elastic seal member is fixed to the outer diameter side portion of the slinger member, and the annular protrusion is formed of an annular lip formed so as to face the collar-like portion of the seal lip member from the elastic seal member. There may be.
According to this, since the labyrinth structure is constituted by the annular lip as the annular protrusion provided in the slinger member and the annular lip of the flange portion of the seal lip member, the labyrinth structure and the flange portion of the slinger member The annular sealing lip that comes in contact with the bearing effectively exhibits the function of preventing the intrusion of muddy water into the bearing device as described above, and contributes to the reduction of the rotational torque of the inner ring.
In addition, the annular protrusion includes an extending portion formed so as to extend and fold the fitting cylindrical portion of the slinger member from the one end portion toward the outer ring side, and the flange portion is formed of the extending portion. It is good also as what is formed continuously in the protrusion part.
According to this, the overhang | projection part as an annular protrusion with which a slinger member is equipped has a function similar to the above.

本発明によれば、外輪に対してハブフランジ付内輪が軸回転可能に支持される軸受装置において、簡単な構造でありながら、フランジ面からの軸受空間内への泥水の浸入を抑え、回転トルクの低減化を実現することができる軸受密封装置を提供することができる。   According to the present invention, in a bearing device in which an inner ring with a hub flange is supported so as to be axially rotatable with respect to an outer ring, the intrusion of muddy water from the flange surface into the bearing space is suppressed while the rotation torque is reduced. It is possible to provide a bearing sealing device that can realize a reduction in the above.

本発明に係る軸受密封装置が適用される軸受装置の一例を示す概略的縦断面図である。It is a schematic longitudinal cross-sectional view which shows an example of the bearing apparatus with which the bearing sealing apparatus which concerns on this invention is applied. 図１のＸ部の拡大図であって、本発明に係る軸受密封装置の一実施形態を示す図である。It is an enlarged view of the X section of Drawing 1, and is a figure showing one embodiment of the bearing sealing device concerning the present invention. 本発明に係る軸受密封装置の別の実施形態を示す図２と同様図である。It is a figure similar to FIG. 2 which shows another embodiment of the bearing sealing device which concerns on this invention. 図３に示す例の変形例を示す図２と同様図である。FIG. 4 is a view similar to FIG. 2 showing a modification of the example shown in FIG. 3. 図３に示す例の別の変形例を示す図２と同様図である。FIG. 4 is a view similar to FIG. 2 showing another modification of the example shown in FIG. 3. 本発明に係る軸受密封装置のさらに別の実施形態を示す図２と同様図である。It is the same figure as FIG. 2 which shows another embodiment of the bearing sealing device which concerns on this invention. 図６に示す例の変形例を示す図２と同様図である。It is the same figure as FIG. 2 which shows the modification of the example shown in FIG.

以下、本発明の実施の形態について、図面に基づいて説明する。図１は、自動車の駆動側輪（不図示）を軸回転可能に支持する軸受装置１を示す。この軸受装置１は、大略的に、外輪２と、ハブ輪３と、ハブ輪３の車体側に嵌合一体とされる内輪部材４と、外輪２とハブ輪３及び内輪部材４との間に介装される２列の転動体（ボール）６…とを含んで構成されるハブベアリングである。この例では、ハブ輪３及び内輪部材４が内輪５を構成する。外輪２は、自動車の車体（不図示）に固定される。また、ハブ輪３にはドライブシャフト（不図示）が同軸的にスプライン嵌合される。内輪５（ハブ輪３及び内輪部材４）は、外輪２に対して、軸心Ｌ回りに回転可能とされ、外輪２と、内輪５とにより、相対的に回転する２部材が構成され、該２部材間に環状空間Ｓが形成される。環状空間Ｓ内には、２列の転動体６…が、リテーナ６ａに保持された状態で、外輪２の軌道輪２ａ、ハブ輪３の軌道輪３ａ及び内輪部材４の軌道輪４ａを転動可能に介装されている。ハブ輪３は、円筒状のハブ輪本体３０と、ハブ輪本体３０より立上基部３１を介して径方向外側に延出するよう形成されたハブフランジ３２を有し、ハブフランジ３２にボルト３３及び不図示のナットによって車輪が取付け固定される。ハブフランジ３２は、立上基部３１の外径側で内輪５（ハブ輪３）と同心且つ段状に形成された円筒部３４を有している。以下において、軸心Ｌ方向に沿って車輪に向く側（図１において右側を向く側）を車輪側、車体に向く側（同左側を向く側）を車体側と言う。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a bearing device 1 that supports a drive side wheel (not shown) of an automobile so as to be rotatable about a shaft. The bearing device 1 is generally formed between an outer ring 2, a hub ring 3, an inner ring member 4 fitted and integrated on the vehicle body side of the hub ring 3, and between the outer ring 2, the hub ring 3, and the inner ring member 4. The hub bearing is configured to include two rows of rolling elements (balls) 6. In this example, the hub ring 3 and the inner ring member 4 constitute an inner ring 5. The outer ring 2 is fixed to a vehicle body (not shown) of the automobile. A drive shaft (not shown) is coaxially splined to the hub wheel 3. The inner ring 5 (the hub ring 3 and the inner ring member 4) is rotatable around the axis L with respect to the outer ring 2, and the outer ring 2 and the inner ring 5 constitute two members that rotate relatively. An annular space S is formed between the two members. In the annular space S, two rows of rolling elements 6... Roll the raceway 2 a of the outer ring 2, the raceway 3 a of the hub ring 3, and the raceway 4 a of the inner ring member 4 while being held by the retainer 6 a. It is possible to intervene. The hub wheel 3 has a cylindrical hub wheel body 30 and a hub flange 32 formed so as to extend radially outward from the hub wheel body 30 via a rising base 31. The wheel is mounted and fixed by a nut (not shown). The hub flange 32 has a cylindrical portion 34 formed concentrically and stepwise with the inner ring 5 (hub ring 3) on the outer diameter side of the rising base 31. Hereinafter, the side facing the wheel along the axis L direction (the side facing the right side in FIG. 1) is referred to as the wheel side, and the side facing the vehicle body (the side facing the left side) is referred to as the vehicle body side.

ハブフランジ３２は、その車体側の面であるフランジ面３２ａが、車体側に隆起するように形成された円筒部３４を含んでおり、この円筒部３４の外径面３４ａが、前記段状をなすように構成されている。フランジ面３２ａの一部としての円筒部３４の車体側端面は、立上基部３１の表面である凹曲状基部面３１ａを介してハブ輪本体３０の外径面３０ａに連続した面を構成する。環状空間Ｓは、軸受空間を形成し、この環状空間（以下、軸受空間と言う）Ｓの軸心Ｌ方向に沿った両端部であって、外輪２とハブ輪３との間、及び外輪２と内輪部材４との間には、ベアリングシール７，８が装着され、軸受空間Ｓの軸心Ｌ方向に沿った両端部が密封される。これによって、軸受空間Ｓ内への泥水等の浸入や軸受空間Ｓ内に充填される潤滑剤（グリース等）の外部への漏出が防止される。これらベアリングシール７，８の内、車輪側のベアリングシール８が本発明に係る軸受密封装置の一実施形態に相当する。外輪２及び内輪５（ハブ輪３及び内輪部材４）は、錆易い金属材から構成され、例えば、炭素鋼または高炭素クロム鋼等によって作製される。   The hub flange 32 includes a cylindrical portion 34 formed so that a flange surface 32a, which is a surface on the vehicle body side, protrudes toward the vehicle body side, and the outer diameter surface 34a of the cylindrical portion 34 has the stepped shape. It is configured to make. The end surface on the vehicle body side of the cylindrical portion 34 as a part of the flange surface 32 a constitutes a surface that is continuous with the outer diameter surface 30 a of the hub wheel body 30 via the concave curved base surface 31 a that is the surface of the rising base 31. . The annular space S forms a bearing space, and is both ends of the annular space (hereinafter referred to as bearing space) S along the axial center L direction, between the outer ring 2 and the hub ring 3, and the outer ring 2. Bearing seals 7 and 8 are mounted between the inner ring member 4 and the inner ring member 4, and both end portions along the axis L direction of the bearing space S are sealed. This prevents intrusion of muddy water or the like into the bearing space S and leakage of the lubricant (grease or the like) filled in the bearing space S to the outside. Of these bearing seals 7, 8, the wheel side bearing seal 8 corresponds to an embodiment of the bearing sealing device according to the present invention. The outer ring 2 and the inner ring 5 (the hub ring 3 and the inner ring member 4) are made of a metal material that easily rusts, and are made of, for example, carbon steel or high carbon chrome steel.

本発明に係る軸受密封装置の一実施形態としてのベアリングシール８について図２を参照して説明する。図２に示すベアリングシール（軸受密封装置）８は、大略的に、内輪５に嵌合される不錆性金属材からなるスリンガ部材９と、外輪２に嵌合される芯金１２と、芯金１２に固着され、スリンガ部材９に弾接する少なくとも１個の環状シールリップ２０ａを備える弾性体製のシールリップ部材２０とからなる。さらに具体的には、スリンガ部材９は、ハブフランジ３２に形成された円筒部３４に嵌合される嵌合円筒部１０と、嵌合円筒部１０の車体側一端部１０ａよりハブフランジ３２のフランジ面３２ａに沿って内径側に延出される鍔部１１とを備える。鍔部１１の内径側先側部１１ａは、車体側に屈曲され内輪５（ハブ輪３）に非接触の状態とされる。スリンガ部材９の嵌合円筒部１０は、ハブフランジ３２に形成された円筒部３４の外径面３４ａに嵌合される。ここでのフランジ面３２ａは、円筒部３４の車体側端面に相当する。スリンガ部材９を構成する不錆性金属としては、ステンレス鋼（例えば、ＳＵＳ３０４）、チタン鋼、或いは、ＳＰＣＣ鋼板にメッキ等の表面処理を施したものなどが用いられる。   A bearing seal 8 as one embodiment of a bearing sealing device according to the present invention will be described with reference to FIG. A bearing seal (bearing sealing device) 8 shown in FIG. 2 is roughly composed of a slinger member 9 made of a non-rusting metal material fitted to the inner ring 5, a core metal 12 fitted to the outer ring 2, a core The seal lip member 20 is made of an elastic body and has at least one annular seal lip 20 a fixed to the gold 12 and elastically contacting the slinger member 9. More specifically, the slinger member 9 includes a fitting cylindrical portion 10 fitted to a cylindrical portion 34 formed on the hub flange 32, and a flange of the hub flange 32 from the vehicle body side one end portion 10a of the fitting cylindrical portion 10. And a flange 11 extending toward the inner diameter side along the surface 32a. The inner diameter side front side portion 11a of the flange portion 11 is bent toward the vehicle body side and is not in contact with the inner ring 5 (hub wheel 3). The fitting cylindrical portion 10 of the slinger member 9 is fitted to the outer diameter surface 34 a of the cylindrical portion 34 formed on the hub flange 32. The flange surface 32a here corresponds to the end surface of the cylindrical portion 34 on the vehicle body side. As the non-rusting metal constituting the slinger member 9, stainless steel (for example, SUS304), titanium steel, or SPCC steel plate subjected to surface treatment such as plating is used.

芯金１２は、外輪２の内径面２ｂに嵌合される嵌合円筒部１３と、嵌合円筒部１３の車輪側一端部１３ａより内径側に延出されるフランジ部（以下、内径側フランジ部と言う）１４とからなる。シールリップ部材２０は、ゴム或いは弾性樹脂等のエラストマー材からなり、芯金１２の所定部位に成形により一体に固着されている。本実施形態のシールリップ部材２０は、芯金１２の内径側フランジ部１４における車輪側の面１４ａから内径側フランジ部１４の内径側端縁部１４ｂを回り込んで車体側の面１４ｃに至るよう内径側フランジ部１４に固着されたシールリップ基部２００を有している。そして、このシールリップ基部２００から、３個の環状シールリップ２０ａ，２０ｂ，２０ｃが延出されている。環状シールリップ２０ａは、先行拡径状に延出されてスリンガ部材９の鍔部１１の車体側面１１ｂに弾接するアキシャルリップとされる。以下、環状シールリップ２０ａをアキシャルリップ２０ａと言う。環状シールリップ２０ｂはこの環状シールリップ２０ａより内径側に位置し、先行拡径状に延出されてハブフランジ３２のフランジ面３２ａに近接するアキシャルリップとされている。この内径側の環状シールリップ（以下、内径側アキシャルリップと言う）２０ｂの先側は、スリンガ部材における鍔部１１の屈曲した内径側先側部１１ａとフランジ面３２ａとの間に位置し、鍔部１１の屈曲した内径側先側部１１ａとの間でラビリンス構造ｒを形成する。環状シールリップ２０ｃは、先行縮径状で車体側（軸受空間Ｓ側）に向くよう延出されてハブ輪本体３０の外径面３０ａに弾接するラジアルリップである。以下、環状シールリップ２０ｃをラジアルリップ２０ｃと言う。   The cored bar 12 includes a fitting cylindrical portion 13 fitted to the inner diameter surface 2b of the outer ring 2, and a flange portion (hereinafter referred to as inner diameter side flange portion) extending from the wheel side one end portion 13a of the fitting cylindrical portion 13 to the inner diameter side. 14). The seal lip member 20 is made of an elastomer material such as rubber or elastic resin, and is integrally fixed to a predetermined portion of the core metal 12 by molding. The seal lip member 20 of the present embodiment extends from the wheel side surface 14a of the inner diameter side flange portion 14 of the core metal 12 to the inner surface side edge 14b of the inner diameter side flange portion 14 to reach the surface 14c on the vehicle body side. It has a seal lip base 200 fixed to the inner diameter side flange portion 14. Three annular seal lips 20a, 20b, and 20c are extended from the seal lip base 200. The annular seal lip 20 a is an axial lip that extends in a preceding diameter-expanding shape and elastically contacts the vehicle body side surface 11 b of the flange portion 11 of the slinger member 9. Hereinafter, the annular seal lip 20a is referred to as an axial lip 20a. The annular seal lip 20b is positioned on the inner diameter side of the annular seal lip 20a, and is an axial lip that extends in the preceding diameter-expanded shape and is close to the flange surface 32a of the hub flange 32. The tip side of the inner diameter side annular seal lip (hereinafter referred to as inner diameter side axial lip) 20b is located between the bent inner diameter side front side portion 11a of the flange portion 11 of the slinger member and the flange surface 32a. A labyrinth structure r is formed between the bent portion 11 and the inner diameter side front side portion 11a. The annular seal lip 20c is a radial lip that has a reduced diameter and extends toward the vehicle body side (bearing space S side) and elastically contacts the outer diameter surface 30a of the hub wheel body 30. Hereinafter, the annular seal lip 20c is referred to as a radial lip 20c.

スリンガ部材９の外径側部分、即ち、本実施形態では、嵌合円筒部１０の車体側一端部１０ａから車輪側他端部１０ｂに至る外表面を覆うように、前記と同様のゴム或いは弾性樹脂等のエラストマー材からなる弾性シール部材２１が固着されている。この弾性シール部材２１の車輪側他端部１０ｂを覆う部分は、ハブフランジ３２の一部としての円筒部３４の外径面３４ａに密着するように形成されている。また、弾性シール部材２１は、嵌合円筒部１０の車体側一端部１０ａを覆う部分から、外輪２の車輪側端面２ｃ及び車輪側端面２ｃと外径面２ｄとの角部に小間隙をもって対峙するよう延出された環状リップ２１ａを備えている。この環状リップ２１ａは、外輪２の前記角部を含む車輪側端面２ｃとの間に前記小間隙によるラビリンス構造ｒ１を形成する。   The same rubber or elasticity as described above so as to cover the outer diameter side portion of the slinger member 9, that is, the outer surface from the vehicle body side one end portion 10a to the wheel side other end portion 10b of the fitting cylindrical portion 10 in this embodiment. An elastic seal member 21 made of an elastomer material such as resin is fixed. A portion of the elastic seal member 21 covering the other wheel end 10 b is formed so as to be in close contact with the outer diameter surface 34 a of the cylindrical portion 34 as a part of the hub flange 32. Further, the elastic seal member 21 is opposed to the wheel side end surface 2c of the outer ring 2 and the corners between the wheel side end surface 2c and the outer diameter surface 2d with a small gap from the portion covering the vehicle body side one end portion 10a of the fitting cylindrical portion 10. An annular lip 21a is provided so as to extend. The annular lip 21a forms a labyrinth structure r1 with the small gap between the annular lip 21a and the wheel side end surface 2c including the corner portion of the outer ring 2.

前記のように構成されるベアリングシール８を備えた軸受装置１において、軸受空間Ｓの車輪側端部が当該ベアリングシール８によって密封される。即ち、環状リップ２１ａと外輪２との間で構成されるラビリンス構造ｒ１によって、ベアリングシール８内への泥水等の浸入が抑えられる。一部泥水がベアリングシール８内へ浸入したとしても、アキシャルリップ２０ａがスリンガ部材９における鍔部１１の車体側面１１ｂに弾接しているから、この弾接部で堰き止められて、それ以上のベアリングシール８内への浸入が阻止される。仮に、泥水がこの弾接部から浸入したとしても、内径側アキシャルリップ２０ｂが先行拡径状で、ハブフランジ３２のフランジ面３２ａに近接し、鍔部１１の内径側先側部１１ａとラビリンス構造ｒを形成しているから、さらに、軸受空間Ｓ側への泥水等の浸入は阻止される。また、ラジアルリップ２０ｃがハブ輪本体３０の外径面３０ａに弾接しているから、軸受空間Ｓ内に充填されているグリース等の潤滑剤がこの弾接部で堰き止められて、ベアリングシール８内へ漏出することも抑えられる。そして、内輪５が軸心Ｌの回りに回転すると、アキシャルリップ２０ａ及びラジアルリップ２０ｃは、それぞれスリンガ部材９における鍔部１１の車体側面１１ｂ及びハブ輪本体３０の外径面３０ａに弾性的に相対摺接する。また、前記ラビリンス構造ｒ，ｒ１が保たれた状態で内輪５の前記回転がなされる。したがって、内輪５の回転中においても、前記シール機能が発揮される。   In the bearing device 1 including the bearing seal 8 configured as described above, the wheel side end portion of the bearing space S is sealed by the bearing seal 8. That is, the labyrinth structure r <b> 1 configured between the annular lip 21 a and the outer ring 2 prevents muddy water or the like from entering the bearing seal 8. Even if some muddy water enters the bearing seal 8, the axial lip 20a is elastically in contact with the vehicle body side surface 11b of the flange 11 of the slinger member 9. Intrusion into the seal 8 is prevented. Even if muddy water permeates from this elastic contact portion, the inner diameter side axial lip 20b is in a leading diameter-expanded shape, close to the flange surface 32a of the hub flange 32, and the inner diameter side front side portion 11a of the flange portion 11 and the labyrinth structure. Since r is formed, intrusion of muddy water or the like into the bearing space S side is further prevented. Further, since the radial lip 20c is in elastic contact with the outer diameter surface 30a of the hub wheel body 30, the lubricant such as grease filled in the bearing space S is blocked by the elastic contact portion, and the bearing seal 8 Leaking into the inside is also suppressed. When the inner ring 5 rotates about the axis L, the axial lip 20a and the radial lip 20c are elastically relative to the vehicle body side surface 11b of the flange 11 and the outer diameter surface 30a of the hub ring body 30 in the slinger member 9, respectively. Make sliding contact. The inner ring 5 is rotated while the labyrinth structures r and r1 are maintained. Therefore, the sealing function is exhibited even while the inner ring 5 is rotating.

また、スリンガ部材９の外径側に位置する嵌合円筒部１０とハブフランジ３２に形成される円筒部３４との嵌合により、円筒部３４より外径側のフランジ面３２ａを伝う泥水等が、嵌合円筒部１０と円筒部３４との嵌合部によって堰き止められる。これによって、当該嵌合部から内径側のフランジ面３２ａとスリンガ部材９の鍔部１１との間に泥水が浸入することが抑えられる。特に、スリンガ部材９の嵌合円筒部１０の車体側一端部１０ａから車輪側他端部１０ｂに至る外表面が弾性シール部材２１で覆われ、しかも、車輪側他端部１０ｂでは、弾性シール部材２１が円筒部３４の外径面３４ａに密着しているから、前記嵌合部での密封が確実になされる。これによって、嵌合部から内径側のフランジ面３２ａへ錆が進行することが抑えられる。また、スリンガ部材９は不錆性金属材からなるから、スリンガ部材９の表面が錆びることがなく、鍔部１１の表面を相対摺接するアキシャルリップ２０ａが摺接面の錆によって摩耗して、早期にシール性が低下することがない。さらに、スリンガ部材９における鍔部１１の内径側先側部１１ａは内輪５に非接触の状態とされ、この内径側先側部１１ａと内径側アキシャルリップ２０ｂとによりラビリンス構造ｒが形成されるから、密封機能が発揮されながらも、内輪５の回転トルクの増大を招く懸念がない。   Further, due to the fitting between the fitting cylindrical portion 10 positioned on the outer diameter side of the slinger member 9 and the cylindrical portion 34 formed on the hub flange 32, muddy water or the like transmitted through the flange surface 32 a on the outer diameter side from the cylindrical portion 34. It is blocked by the fitting portion between the fitting cylindrical portion 10 and the cylindrical portion 34. Accordingly, it is possible to prevent muddy water from entering between the flange portion 32a on the inner diameter side and the flange portion 11 of the slinger member 9 from the fitting portion. In particular, the outer surface from the vehicle body side one end portion 10a of the fitting cylindrical portion 10 of the slinger member 9 to the wheel side other end portion 10b is covered with an elastic seal member 21, and the wheel side other end portion 10b has an elastic seal member. Since 21 is in close contact with the outer diameter surface 34a of the cylindrical portion 34, the fitting portion is reliably sealed. This suppresses the rust from proceeding from the fitting portion to the flange surface 32a on the inner diameter side. Further, since the slinger member 9 is made of a non-rusting metal material, the surface of the slinger member 9 is not rusted, and the axial lip 20a that makes a relative sliding contact with the surface of the flange portion 11 is worn by the rust of the sliding contact surface. In addition, the sealing performance does not deteriorate. Further, the inner diameter side front side portion 11a of the flange portion 11 of the slinger member 9 is not in contact with the inner ring 5, and the inner diameter side front side portion 11a and the inner diameter side axial lip 20b form a labyrinth structure r. There is no concern that the rotational torque of the inner ring 5 will increase while the sealing function is exhibited.

図３は、本発明に係る軸受密封装置の別の実施形態を示す。この実施形態のベアリングシール（軸受密封装置）８Ａの芯金１２は、外輪２の内径面２ｂに嵌合される嵌合円筒部１３と、嵌合円筒部１３の車体側他端部１３ｂより内径側に延出する内径側フランジ部１４と、嵌合円筒部１３の車輪側一端部１３ａより外径側に延出する外径側フランジ部１５とからなる。内径側フランジ部１４は、車輪側（ハブフランジ３２側）に折り返すように形成された内径側円筒状部１４Ａを含んでいる。外径側フランジ部１５は、当該芯金１２が、外輪２に嵌合された時には、外輪２の車輪側端面２ｃに当接するように構成されている。   FIG. 3 shows another embodiment of the bearing sealing device according to the present invention. The metal core 12 of the bearing seal (bearing sealing device) 8A of this embodiment has an inner diameter from the fitting cylindrical portion 13 fitted to the inner diameter surface 2b of the outer ring 2 and the vehicle body side other end portion 13b of the fitting cylindrical portion 13. The inner diameter side flange portion 14 extending to the side and the outer diameter side flange portion 15 extending to the outer diameter side from the wheel side one end portion 13a of the fitting cylindrical portion 13 are formed. The inner diameter side flange portion 14 includes an inner diameter side cylindrical portion 14A formed so as to be folded back to the wheel side (hub flange 32 side). The outer diameter side flange portion 15 is configured to contact the wheel side end surface 2 c of the outer ring 2 when the core metal 12 is fitted to the outer ring 2.

シールリップ部材２０のシールリップ基部２００は、内径側フランジ部１４の車輪側面１４ａ（円筒状部１４Ａの外径面も含む）から、円筒部１３の内径面１３ｃ及び外径側フランジ部１５の車輪側面１５ａを覆うように固着されている。さらに、シールリップ基部２００は、内径側では、内径側フランジ部１４の内径側端縁部１４ｂを回り込んで車体側面１４ｃに至り、一方、外径側では、外径側フランジ部１５の外径側端縁部１５ｂを回り込んで車体側面１５ｃに至っている。シールリップ基部２００の内径側半部には、前記実施形態と同様の３個の環状シールリップ（アキシャルリップ２０ａ，２０ｂ及びラジアルリップ２０ｃ）が形成されている。そして、シールリップ基部２００における外径側フランジ部１５を覆う部分は、ディスク状に径大化されて外輪２より外径側に突出する庇状部２０１を構成する。この庇状部２０１には、車輪側に向く庇状環状リップ２０１ａが先行拡径状に形成されている。この庇状環状リップ２０１ａの内径側であって、アキシャルリップ２０ａより外径側のシールリップ基部２００には、車輪側に向く先行拡径状の外径側アキシャルリップ２０ｄが形成されている。さらに、庇状部２０１は、外径側フランジ部１５の外径側端縁部１５ｂを回り込んで車体側面１５ｃに至る回り込み部２０１ｂを有している。この回り込み部２０１ｂは、前記のように芯金１２が外輪２に嵌合された際、外径側フランジ部１５と外輪２の車輪側端面２ｃとの間に圧縮状態で介在するよう構成されている。   The seal lip base portion 200 of the seal lip member 20 is formed from the wheel side surface 14a of the inner diameter side flange portion 14 (including the outer diameter surface of the cylindrical portion 14A), the inner diameter surface 13c of the cylindrical portion 13, and the wheel of the outer diameter side flange portion 15. It is fixed so as to cover the side surface 15a. Further, on the inner diameter side, the seal lip base portion 200 wraps around the inner diameter side edge portion 14b of the inner diameter side flange portion 14 and reaches the vehicle body side surface 14c. On the outer diameter side, the outer diameter of the outer diameter side flange portion 15 is reached. It wraps around the side edge 15b and reaches the vehicle body side surface 15c. Three annular seal lips (axial lips 20a, 20b and radial lip 20c) similar to the above-described embodiment are formed on the inner diameter side half of the seal lip base 200. A portion of the seal lip base 200 covering the outer diameter side flange portion 15 constitutes a flange-shaped portion 201 that is enlarged in a disk shape and protrudes to the outer diameter side from the outer ring 2. A hook-like annular lip 201a facing the wheel side is formed in the bowl-like portion 201 so as to have a previously enlarged diameter. An outer diameter side axial lip 20d having a previously enlarged diameter toward the wheel side is formed on the seal lip base 200 on the inner diameter side of the bowl-shaped annular lip 201a and on the outer diameter side of the axial lip 20a. Further, the bowl-shaped portion 201 has a wrap-around portion 201b that wraps around the outer-diameter end edge portion 15b of the outer-diameter-side flange portion 15 and reaches the vehicle body side surface 15c. The wraparound portion 201b is configured to be interposed in a compressed state between the outer diameter side flange portion 15 and the wheel side end surface 2c of the outer ring 2 when the core metal 12 is fitted to the outer ring 2 as described above. Yes.

スリンガ部材９は、前記実施形態と同様の嵌合円筒部１０と、鍔部１１とからなり、その全体形状も前記実施形態と同様である。そして、嵌合円筒部１０の外表面は、前記実施形態と同様の環状リップ２１ａを備える弾性シール部材２１で覆われているが、この弾性シール部材２１は、環状リップ２１ａの内径側に、車体側に向く先行拡径状の環状リップ２１ｂ（以下、内径側環状リップ２１ｂと言う）をさらに備えている。これら環状リップ２１ａ及び内径側環状リップ２１ｂは、シールリップ部材２０の庇状部２０１に向く環状突部とされる。シールリップ部材２０に形成される庇状部２０１の一構成部としての庇状環状リップ２０１ａ及び外径側アキシャルリップ２０ｄと、スリンガ部材９に設けられる環状リップ２１ａ及び内径側環状リップ２１ｂとは、各先側部が互いに行き違い状に対峙する。これによってジグザク状のラビリンス構造ｒ２が形成されている。   The slinger member 9 includes a fitting cylindrical portion 10 and a flange portion 11 similar to those in the above embodiment, and the overall shape thereof is the same as that in the above embodiment. And the outer surface of the fitting cylindrical part 10 is covered with the elastic seal member 21 provided with the same annular lip 21a as the above-mentioned embodiment, but this elastic seal member 21 is formed on the inner diameter side of the annular lip 21a on the vehicle body. It further includes an annular lip 21b having an enlarged diameter toward the side (hereinafter referred to as an inner diameter side annular lip 21b). The annular lip 21 a and the inner diameter side annular lip 21 b are annular protrusions facing the flange 201 of the seal lip member 20. The flange-shaped annular lip 201a and the outer-diameter-side axial lip 20d as one component of the collar-shaped portion 201 formed on the seal lip member 20, and the annular lip 21a and the inner-diameter-side annular lip 21b provided on the slinger member 9 are: Each front side faces each other. Thus, a zigzag labyrinth structure r2 is formed.

この実施形態のベアリングシール８Ａも、図１に示す軸受装置１におけるハブフランジ３２側の内輪５と外輪２との間に、前記と同様に装着されて用いられる。スリンガ部材９とシールリップ部材２０におけるアキシャルリップ２０ａ及び内径側アキシャルリップ２０ｂとが関連し合う機能、及びラジアルリップ２０ｃの機能は、前記実施形態と同様であるから、ここではその説明を省略する。そして、本実施形態のベアリングシール８Ａにおいては、庇状部２０１の庇状環状リップ２０１ａ及び外径側アキシャルリップ２０ｄと、環状リップ２１ａ及び内径側環状リップ２１ｂとによるジグザグ状のラビリンス構造ｒ２によって、泥水等のベアリングシール８Ａ内への浸入がより効果的に阻止される。加えて、ラビリンス構造ｒ２によって内輪５の回転トルクの増大を招くことなく泥水の浸入が防止される。また、芯金１２における外径側フランジ部１５が外輪２の車輪側端面２ｃに当接するから、外輪２の外径面２ｄを伝う泥水等の、車輪側端面２ｃを経た外輪２と芯金１２との嵌合部への浸入が抑えられる。しかも、この当接部に、庇状部２０１の一部を構成する回り込み部２０１ｂが圧縮状態で介在するから、前記嵌合部への泥水等の浸入の阻止が的確になされる。これによって、外輪２の車体側端面２ｃから内径面２ｂにかけての錆の進行が抑えられる。   The bearing seal 8A of this embodiment is also used in the same manner as described above between the inner ring 5 and the outer ring 2 on the hub flange 32 side in the bearing device 1 shown in FIG. The functions of the slinger member 9 and the seal lip member 20 in which the axial lip 20a and the inner diameter side axial lip 20b are related to each other and the function of the radial lip 20c are the same as those in the above-described embodiment, and thus the description thereof is omitted here. In the bearing seal 8A of the present embodiment, the zigzag labyrinth structure r2 is formed by the flange-shaped annular lip 201a and the outer-diameter-side axial lip 20d of the flange-shaped portion 201, and the annular lip 21a and the inner-diameter-side annular lip 21b. Intrusion of muddy water or the like into the bearing seal 8A is more effectively prevented. In addition, the labyrinth structure r2 prevents muddy water from entering without increasing the rotational torque of the inner ring 5. Further, since the outer diameter side flange portion 15 of the core metal 12 abuts on the wheel side end surface 2c of the outer ring 2, the outer ring 2 and the core metal 12 passing through the wheel side end surface 2c such as muddy water traveling on the outer diameter surface 2d of the outer ring 2 are provided. Intrusion into the fitting part is suppressed. In addition, since the sneak portion 201b that constitutes a part of the bowl-shaped portion 201 is interposed in the contact portion in a compressed state, entry of muddy water or the like into the fitting portion is accurately prevented. Thereby, the progress of rust from the vehicle body side end surface 2c of the outer ring 2 to the inner diameter surface 2b is suppressed.

図４は、図３に示す実施形態の変形例を示している。この実施形態のベアリングシール（軸受密封装置）８Ａ１における芯金１２及びシールリップ部材２０の構成は、図３に示す実施形態と同様であるので、共通部分に同一の符号を付し、その構成についての説明は省略する。
本実施形態のベアリングシール８Ａ１におけるスリンガ部材９は、前記と同様に嵌合円筒部１０と、前記と同形状の鍔部１１とを有している。しかし、鍔部１１は、嵌合円筒部１０の車体側一端部１０ａより外径側に延出され且つ重合するように折り返された外向鍔状部１１０に連続して形成されている。そして、スリンガ部材９における嵌合円筒部１０の外表面及び外向鍔状部１１０の外表面は、前記と同様のゴム或いは弾性樹脂等のエラストマー材からなる弾性シール部材２１によって覆われている。この弾性シール部材２１は、環状突部として、車体側（庇状部２０１）に向く先行拡径状の環状リップ２１ｃを備えている。この環状リップ２１ｃは、図３に示す例と同様にシールリップ部材２０に形成される庇状部２０１の一構成部としての庇状環状リップ２０１ａ及び外径側アキシャルリップ２０ｄと、ジグザグ状のラビリンス構造ｒ３を形成する。したがって、本実施形態のベアリングシール８Ａ１においても、庇状部２０１の庇状環状リップ２０１ａ及び外径側アキシャルリップ２０ｄと、スリンガ部材９に設けられる環状突部としての環状リップ２１ｃとによるジグザグ状のラビリンス構造ｒ３によって、泥水等のベアリングシール８Ａ１内への浸入がより効果的に阻止される。その他の構成による作用・効果は図３に示す例と同様であるから、その説明を省略する。 FIG. 4 shows a modification of the embodiment shown in FIG. The configuration of the cored bar 12 and the seal lip member 20 in the bearing seal (bearing sealing device) 8A1 of this embodiment is the same as that of the embodiment shown in FIG. Description of is omitted.
The slinger member 9 in the bearing seal 8A1 of the present embodiment has a fitting cylindrical portion 10 and a flange portion 11 having the same shape as described above, as described above. However, the flange portion 11 is formed continuously from the outward flange portion 110 extending from the vehicle body side one end portion 10a of the fitting cylindrical portion 10 to the outer diameter side and folded back so as to overlap. And the outer surface of the fitting cylindrical part 10 in the slinger member 9 and the outer surface of the outward collar part 110 are covered with the elastic sealing member 21 which consists of elastomer materials, such as the rubber | gum or elastic resin similar to the above. The elastic seal member 21 includes an annular lip 21c having a previously enlarged diameter that faces the vehicle body side (the flange 201) as an annular protrusion. The annular lip 21c includes a flange-shaped annular lip 201a and an outer-diameter-side axial lip 20d as one component of the flange-shaped portion 201 formed on the seal lip member 20, and a zigzag labyrinth as in the example shown in FIG. Structure r3 is formed. Therefore, also in the bearing seal 8A1 of the present embodiment, a zigzag shape is formed by the flange-shaped annular lip 201a and the outer diameter side axial lip 20d of the flange-shaped portion 201 and the annular lip 21c as an annular protrusion provided on the slinger member 9. The labyrinth structure r3 prevents muddy water or the like from entering the bearing seal 8A1 more effectively. The operations and effects of the other configurations are the same as in the example shown in FIG.

図５は、図３に示す実施形態の別の変形例を示している。この実施形態のベアリングシール（軸受密封装置）８Ａ２における芯金１２は、図３及び図４に示す例に加えて、外径側フランジ部１５がその外径端から車体側に折り返すように形成された外径側円筒状部１５Ａを含んでいる。この外径側円筒状部１５Ａは、外輪２の外径面２ｄに嵌合されるように形成されている。そして、庇状部２０１を構成するシールリップ基部２００は、外径側フランジ部１５から外径側円筒状部１５Ａを覆い、さらに、外輪２１の外径面２ｄに密着するよう外径側フランジ部１５から外径側円筒状部１５Ａの外表面に固着されている。庇状部２０１には、図３及び図４に示す例と同様の庇状環状リップ２０１ａが形成されている。また、この庇状環状リップ２０１ａの内径側であって、アキシャルリップ２０ａより外径側のシールリップ基部２００には、車輪側に向く先行拡径状の外径側アキシャルリップ２０ｄが形成されている。   FIG. 5 shows another modification of the embodiment shown in FIG. The cored bar 12 in the bearing seal (bearing sealing device) 8A2 of this embodiment is formed so that the outer diameter side flange portion 15 is folded back from the outer diameter end to the vehicle body side in addition to the examples shown in FIGS. The outer diameter side cylindrical portion 15A is included. The outer diameter side cylindrical portion 15 </ b> A is formed to be fitted to the outer diameter surface 2 d of the outer ring 2. The seal lip base portion 200 constituting the flange portion 201 covers the outer diameter side cylindrical portion 15A from the outer diameter side flange portion 15 and further contacts the outer diameter surface 2d of the outer ring 21 so as to be in close contact with the outer diameter side flange portion. 15 is fixed to the outer surface of the cylindrical portion 15A on the outer diameter side. A hook-like annular lip 201 a similar to the example shown in FIGS. 3 and 4 is formed in the hook-like portion 201. Further, an outer diameter side axial lip 20d having a previously enlarged diameter toward the wheel is formed on the seal lip base portion 200 on the inner diameter side of the bowl-shaped annular lip 201a and on the outer diameter side of the axial lip 20a. .

スリンガ部材９は、前記と同様に嵌合円筒部１０と、前記と同形状の鍔部１１とを有している。しかし、鍔部１１は、嵌合円筒部１０の車体側一端部１０ａより外輪２側に向け張り出すように延長し且つ重合状態で折り返すように形成された筒状の張出部１１１からフランジ面３２ａに沿うよう内径側に屈曲されて形成されている。この張出部１１１は、環状突部として、シールリップ基部２００に形成される庇状部２０１の一構成部としての庇状環状リップ２０１ａ及び外径側アキシャルリップ２０ｄと、先側部が互いに行き違い状に対峙する。これによってジグザク状のラビリンス構造ｒ４が形成されている。嵌合円筒部１０の他端部１０ｂを含む車輪側部分は弾性シール部材２１で覆われ、この弾性シール部材２１は、ハブフランジ３２における円筒部３４の外径面３４ａに密着するよう形成されている。したがって、本実施形態のベアリングシール８Ａ２においても、シールリップ部材２０の庇状部２０１（庇状環状リップ２０１ａ）及び外径側アキシャルリップ２０ｄと、スリンガ部材９に設けられる環状突部としての張出部１１１とによるジグザグ状のラビリンス構造ｒ４によって、泥水等のベアリングシール８Ａ２内への浸入がより効果的に阻止される。また、弾性シール部材２１が円筒部３４の外径面３４ａに密着していることにより、スリンガ部材９の嵌合円筒部１０とハブフランジ３２の円筒部３４との嵌合部への泥水等の浸入が阻止される。その他の構成による作用・効果は図３及び図４に示す例と同様であるから、ここでもその説明を省略する。   The slinger member 9 has a fitting cylindrical portion 10 and a flange portion 11 having the same shape as described above, as described above. However, the flange portion 11 extends from the end portion 10a on the vehicle body side of the fitting cylindrical portion 10 so as to protrude toward the outer ring 2 side, and is flanged from the tubular protruding portion 111 formed so as to be folded back in a superposed state. It is bent to the inner diameter side along 32a. The projecting portion 111 is a ring-shaped protrusion, and the front side portion of the flange-shaped annular lip 201a and the outer-diameter-side axial lip 20d as one component of the flange-shaped portion 201 formed on the seal lip base 200 are crossed each other. Confront. As a result, a zigzag labyrinth structure r4 is formed. The wheel side portion including the other end portion 10 b of the fitting cylindrical portion 10 is covered with an elastic seal member 21, and this elastic seal member 21 is formed so as to be in close contact with the outer diameter surface 34 a of the cylindrical portion 34 in the hub flange 32. Yes. Therefore, also in the bearing seal 8A2 of the present embodiment, the flange portion 201 (the flange-shaped annular lip 201a) and the outer diameter side axial lip 20d of the seal lip member 20 and the overhang as an annular protrusion provided on the slinger member 9 The zigzag labyrinth structure r4 formed by the portion 111 prevents muddy water or the like from entering the bearing seal 8A2. Further, since the elastic seal member 21 is in close contact with the outer diameter surface 34 a of the cylindrical portion 34, muddy water or the like is applied to the fitting portion between the fitting cylindrical portion 10 of the slinger member 9 and the cylindrical portion 34 of the hub flange 32. Intrusion is prevented. Since the operations and effects of the other configurations are the same as those of the example shown in FIGS. 3 and 4, the description thereof is omitted here.

図６は、本発明に係る軸受密封装置のさらに別の実施形態を示す。この実施形態のベアリングシール（軸受密封装置）８Ｂにおいては、スリンガ部材９を構成する鍔部１１の内径側先側部１１ａが、ハブ輪３の立上基部３１（基部面３１ａ）及びハブ輪本体３０（外径面３０ａ）に非接触の状態で、これら基部面３１ａ及び外径面３０ａに倣って車体側に大きく湾曲して延びている。そして、この内径側先側部１１ａを含む鍔部１１の車体側面１１ｂには、アキシャルリップ２０ａ，２０ｂ及びラジアルリップ２０ｃが弾接している。そして、アキシャルリップ２０ｂと、内径側先側部１１ａとは、図２に示すようなラビリンス構造ｒを形成せず、これらの点で図２に示す例と異なる。スリンガ部材９における嵌合円筒部１０には、図２に示す例と同様に、環状リップ２１ａを有する弾性シール部材２１が固着されている。芯金１２及びシールリップ部材２０のその他の構成は図２に示す例と同様である。   FIG. 6 shows still another embodiment of the bearing sealing device according to the present invention. In the bearing seal (bearing sealing device) 8B of this embodiment, the inner diameter side front side portion 11a of the flange portion 11 constituting the slinger member 9 is formed by the rising base portion 31 (base portion surface 31a) of the hub wheel 3 and the hub wheel main body. 30 (outer diameter surface 30a) in a non-contact state, the base surface 31a and the outer diameter surface 30a are curved and extended greatly toward the vehicle body side. The axial lips 20a and 20b and the radial lip 20c are in elastic contact with the vehicle body side surface 11b of the flange portion 11 including the inner diameter side front side portion 11a. The axial lip 20b and the inner diameter side front side portion 11a do not form the labyrinth structure r as shown in FIG. 2, and are different from the example shown in FIG. 2 in these points. An elastic seal member 21 having an annular lip 21a is fixed to the fitting cylindrical portion 10 of the slinger member 9 as in the example shown in FIG. Other configurations of the cored bar 12 and the seal lip member 20 are the same as the example shown in FIG.

この実施形態のベアリングシール８Ｂにおいては、アキシャルリップ２０ａ，２０ｂが鍔部１１の車体側面１１ｂに弾接するから、ラビリンス構造ｒ１を経た一部泥水も、アキシャルリップ２０ａ，２０ｂによって堰き止められ、ベアリングシール８Ｂ内へのそれ以上の浸入が阻止される。そして、スリンガ部材９が不錆性金属材からなるから、内輪５（図１参照）の回転に伴うアキシャルリップ２０ａ，２０ｂの鍔部１１に対する弾性的摺接によっても、錆によるアキシャルリップ２０ａ，２０ｂの摩耗の発生が抑えられ、摩耗によるシール機能の減退が抑えられる。その他の構成による作用・効果は図１に示す例と同様であるので、ここではその説明を省略する。   In the bearing seal 8B of this embodiment, since the axial lips 20a and 20b are in elastic contact with the vehicle body side surface 11b of the flange 11, part of the muddy water that has passed through the labyrinth structure r1 is also blocked by the axial lips 20a and 20b. Further intrusion into 8B is prevented. Since the slinger member 9 is made of a non-rusting metal material, the axial lips 20a and 20b caused by rust are also caused by elastic sliding contact with the flange 11 of the axial lips 20a and 20b accompanying the rotation of the inner ring 5 (see FIG. 1). The generation of wear is suppressed, and the deterioration of the sealing function due to wear is suppressed. Since the operations and effects of the other configurations are the same as the example shown in FIG. 1, the description thereof is omitted here.

図７は、図６に示す例の変形例を示す。この実施形態のベアリングシール（軸受密封装置）８Ｂ１は、スリンガ部材９の鍔部１１における内径側先側部１１ａが、途中２箇所の屈曲部を経て車体側に延びている点、及び、嵌合円筒部１０を覆う弾性シール部材２１が環状リップ２１ａ有していない点で、図６に示す例と異なる。この例では、環状シール部材２１の車体側面（嵌合円筒部１０の一端部１０ａを覆う部分の外面）２１ｄと、外輪２の車輪側端面２ｃとによってラビリンス構造ｒ５が形成される。このラビリンス構造ｒ５によって、ベアリングシール８Ｂ１内への泥水等の浸入が抑えられる。
図６及び図７に示すスリンガ部材９は、形状的に異なるが機能的には大差なく、加工性等を勘案して、設計上適宜選択されるものである。その他の構成及び作用・効果は、図２及び図６に示す例と同様であるので、共通部分に同一の符号を付し、ここでもその説明を省略する。 FIG. 7 shows a modification of the example shown in FIG. The bearing seal (bearing sealing device) 8B1 according to this embodiment has a point that the inner diameter side front side portion 11a of the flange portion 11 of the slinger member 9 extends to the vehicle body side through two bent portions, and is fitted. 6 differs from the example shown in FIG. 6 in that the elastic seal member 21 covering the cylindrical portion 10 does not have the annular lip 21a. In this example, the labyrinth structure r <b> 5 is formed by the vehicle body side surface (the outer surface of the portion covering the one end portion 10 a of the fitting cylindrical portion 10) 21 d and the wheel side end surface 2 c of the outer ring 2. By the labyrinth structure r5, intrusion of muddy water or the like into the bearing seal 8B1 is suppressed.
The slinger members 9 shown in FIGS. 6 and 7 are different in shape but not functionally different, and are appropriately selected in design in consideration of workability and the like. Other configurations, operations, and effects are the same as those in the example shown in FIGS. 2 and 6, and therefore, common portions are denoted by the same reference numerals and description thereof is omitted here.

なお、前記実施形態では、環状シールリップとして、アキシャルリップ２０ａ，２０ｂ，２０ｄおよびラジアルリップ２０ｃを例示したが、これに限らず、スリンガ部材９の鍔部１１に弾接する少なくとも１個の環状シールリップを備えるものであれば、本発明が適用される。また、庇状部２０１及びこれに形成される環状リップ２０１ａの形状も、図例の形状に限定されず、他の形状も採用可能である。さらに、芯金１２の形状も図例の形状に限定されず、他の形状も採用可能である。軸受装置１も図例のものに限らず、従動輪用の軸受装置や、他の同タイプの軸受装置にも本発明の軸受密封装置が適用可能である。環状突部として、弾性シール部材２１から延出して形成された環状リップや、スリンガ部材９の一部を曲げ加工により張出すように形成したものを例示したが、その他の方法により形成されたものであっても良い。   In the above-described embodiment, the axial lips 20a, 20b, 20d and the radial lip 20c are exemplified as the annular seal lips. However, the present invention is not limited to this, and at least one annular seal lip that elastically contacts the flange portion 11 of the slinger member 9 is used. If this is provided, this invention is applied. Further, the shape of the hook-shaped portion 201 and the annular lip 201a formed thereon is not limited to the shape shown in the figure, and other shapes can be adopted. Further, the shape of the cored bar 12 is not limited to the shape shown in the figure, and other shapes can be adopted. The bearing device 1 is not limited to the illustrated example, and the bearing sealing device of the present invention can be applied to a bearing device for a driven wheel and other bearing devices of the same type. As an example of the annular protrusion, an annular lip formed by extending from the elastic seal member 21 or an object formed by extending a part of the slinger member 9 by bending is illustrated, but formed by other methods. It may be.

１ 軸受装置
２ 外輪
３２ ハブフランジ（フランジ部）
３２ａ フランジ面
３４ 円筒部
５（３，４） 内輪
８，８Ａ〜８Ａ２，８Ｂ，８Ｂ１ ベアリングシール（軸受密封装置）
９ スリンガ部材
１０ 嵌合円筒部
１０ａ 一端部
１０ｂ 他端部
１１ 鍔部
１１ａ 内径側先側部
１１１ 張出部（環状突部）
１２ 芯金
２０ シールリップ部材
２０ａ アキシャルリップ（環状シールリップ）
２０ｂ 内径側アキシャルリップ（環状シールリップ）
２１ 弾性シール部材
２１ａ，２１ｂ，２１ｃ 環状リップ（環状突部）
２０１ 庇状部
２０１ａ 庇状環状リップ
ｒ，ｒ１，ｒ２，ｒ３，ｒ４，ｒ５ ラビリンス構造 1 Bearing device 2 Outer ring 32 Hub flange (flange)
32a Flange surface 34 Cylindrical part 5 (3, 4) Inner ring 8, 8A-8A2, 8B, 8B1 Bearing seal (bearing sealing device)
9 Slinger member 10 Fitting cylindrical portion 10a One end portion 10b The other end portion 11 Hook portion 11a Inner diameter side front side portion 111 Overhang portion (annular protrusion)
12 Core 20 Seal lip member 20a Axial lip (annular seal lip)
20b Axial lip (annular seal lip)
21 Elastic seal member 21a, 21b, 21c Annular lip (annular protrusion)
201 bowl-shaped part 201a bowl-shaped annular lip r, r1, r2, r3, r4, r5 labyrinth structure

Claims (6)

外輪に対してハブフランジ付内輪が軸回転可能に支持される軸受装置におけるハブフランジ側内輪と外輪との間に装着される軸受密封装置であって、
前記ハブフランジに前記内輪と同心且つ段状に形成された円筒部に嵌合される嵌合円筒部と、該嵌合円筒部の一端部より前記ハブフランジのフランジ面に沿って内径側に延出されると共に、その内径側先側部が前記内輪に非接触の状態とされた鍔部とを備える不錆性金属材からなるスリンガ部材と、
前記外輪に嵌合される芯金と、
前記芯金に固着され、前記スリンガ部材の鍔部に弾接する少なくとも１個の環状シールリップを備える弾性体製のシールリップ部材と、からなることを特徴とする軸受密封装置。 A bearing sealing device mounted between an inner ring on the hub flange side and an outer ring in a bearing device in which an inner ring with a hub flange is rotatably supported with respect to an outer ring,
A fitting cylindrical portion that is fitted to a cylindrical portion formed concentrically and stepwise with the inner ring on the hub flange, and extends from one end of the fitting cylindrical portion to the inner diameter side along the flange surface of the hub flange. A slinger member made of a non-rusting metal material including a flange portion whose inner diameter side front side portion is brought into a non-contact state with the inner ring,
A metal core fitted to the outer ring;
A bearing sealing device comprising: an elastic seal lip member having at least one annular seal lip that is fixed to the core metal and elastically contacts the flange portion of the slinger member. 請求項１に記載の軸受密封装置において、
前記シールリップ部材は、前記環状シールリップより内径側にさらに環状シールリップを有し、前記スリンガ部材における鍔部の内径側先側部は、当該内径側の環状シールリップとラビリンス構造を形成することを特徴とする軸受密封装置。 The bearing sealing device according to claim 1,
The seal lip member has an annular seal lip further on the inner diameter side than the annular seal lip, and an inner diameter side front side portion of the flange portion of the slinger member forms a labyrinth structure with the inner diameter side annular seal lip. A bearing sealing device characterized by. 請求項１又は請求項２に記載の軸受密封装置において、
前記スリンガ部材における嵌合円筒部の他端部は、前記ハブフランジに密着する弾性シール部材で覆われていることを特徴とする軸受密封装置。 The bearing sealing device according to claim 1 or 2,
The other end of the fitting cylindrical portion of the slinger member is covered with an elastic seal member that is in close contact with the hub flange. 請求項１〜請求項３のいずれか一項に記載の軸受密封装置において、
前記シールリップ部材は、前記外輪より外径側に突出する庇状部を備え、前記スリンガ部材は当該庇状部に向く環状突部を備え、前記庇状部は当該環状突部とラビリンス構造を形成する環状リップを有していることを特徴とする軸受密封装置。 In the bearing sealing device according to any one of claims 1 to 3,
The seal lip member includes a flange-shaped portion that protrudes to the outer diameter side from the outer ring, the slinger member includes an annular protrusion that faces the flange-shaped portion, and the flange-shaped portion has a labyrinth structure with the annular protrusion. A bearing sealing device having an annular lip to be formed. 請求項４に記載の軸受密封装置において、
前記スリンガ部材の外径側部分に弾性シール部材が固着され、前記環状突部は、当該弾性シール部材から前記シールリップ部材の庇状部に向くよう形成された環状リップからなることを特徴とする軸受密封装置。 The bearing sealing device according to claim 4,
An elastic seal member is fixed to an outer diameter side portion of the slinger member, and the annular protrusion is formed of an annular lip formed so as to face the flange-shaped portion of the seal lip member from the elastic seal member. Bearing sealing device. 請求項４に記載の軸受密封装置において、
前記環状突部は、前記スリンガ部材の嵌合円筒部を前記一端部から外輪側に向け張り出すように延長し且つ折り返すように形成された張出部からなり、前記鍔部はこの張出部に連続して形成されていることを特徴とする軸受密封装置。 The bearing sealing device according to claim 4,
The annular protrusion includes an overhang portion formed to extend and fold the fitting cylindrical portion of the slinger member from the one end portion toward the outer ring side, and the flange portion is the overhang portion. The bearing sealing device is formed continuously.
JP2013185405A 2013-09-06 2013-09-06 Bearing seal Pending JP2015052350A (en)

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CN110285146A (en) * 2019-06-12 2019-09-27 浙江万向精工有限公司 A kind of uniform operating condition formula hub-bearing unit assembly type sealing structure
EP3453905A4 (en) * 2016-06-20 2019-12-25 Nok Corporation WATERPROOFING DEVICE
EP3680500A1 (en) * 2019-01-11 2020-07-15 Ntn-Snr Roulements Roller bearing provided with a sealing device
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JP2021143712A (en) * 2020-03-12 2021-09-24 日本精工株式会社 Hub unit bearing
CN114352640A (en) * 2021-12-21 2022-04-15 浙江万向精工有限公司 High-sealing self-adjusting sealing element and hub bearing thereof
CN115388093A (en) * 2022-07-28 2022-11-25 重庆长安汽车股份有限公司 Sealing device, bearing, wheel hub and vehicle of bearing
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JP2017160960A (en) * 2016-03-08 2017-09-14 Ntn株式会社 Wheel bearing device
CN109154394B (en) * 2016-05-18 2020-12-11 Nok株式会社 Seal structure using annular recess and sealing device
JPWO2017199963A1 (en) * 2016-05-18 2019-03-14 Nok株式会社 Sealing structure using annular pocket and sealing device
US10865834B2 (en) 2016-05-18 2020-12-15 Nok Corporation Sealing structure with annular pocket and sealing device
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KR102114195B1 (en) * 2016-05-18 2020-05-22 엔오케이 가부시키가이샤 Sealing structure using annular pocket and sealing device
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IT201700076771A1 (en) * 2017-07-07 2019-01-07 Skf Ab HOLDING DEVICE FOR A ROLLING BEARING
CN109210087A (en) * 2017-07-07 2019-01-15 斯凯孚公司 Sealing device for rolling bearing
EP3425224A1 (en) * 2017-07-07 2019-01-09 Aktiebolaget SKF Sealing device for a rolling bearing
KR102649894B1 (en) 2017-12-15 2024-03-22 섀플러 테크놀로지스 아게 운트 코. 카게 Sealing devices for wheel bearings
DE102018105560B4 (en) 2017-12-15 2019-09-05 Schaeffler Technologies AG & Co. KG Sealing arrangement of a wheel bearing
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KR20200095456A (en) * 2017-12-15 2020-08-10 섀플러 테크놀로지스 아게 운트 코. 카게 Sealing device for wheel bearings
US11193543B2 (en) 2017-12-15 2021-12-07 Schaeffler Technologies AG & Co. KG Sealing arrangement for a wheel bearing
DE102018105560A1 (en) * 2017-12-15 2019-06-19 Schaeffler Technologies AG & Co. KG Sealing arrangement of a wheel bearing
EP3680500A1 (en) * 2019-01-11 2020-07-15 Ntn-Snr Roulements Roller bearing provided with a sealing device
FR3091733A1 (en) * 2019-01-11 2020-07-17 Ntn-Snr Roulements Rolling bearing fitted with a sealing device
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JP7274306B2 (en) 2019-03-04 2023-05-16 Ntn株式会社 Wheel bearing device
CN110285146A (en) * 2019-06-12 2019-09-27 浙江万向精工有限公司 A kind of uniform operating condition formula hub-bearing unit assembly type sealing structure
JP2021143712A (en) * 2020-03-12 2021-09-24 日本精工株式会社 Hub unit bearing
JP7396134B2 (en) 2020-03-12 2023-12-12 日本精工株式会社 hub unit bearing
CN114352640A (en) * 2021-12-21 2022-04-15 浙江万向精工有限公司 High-sealing self-adjusting sealing element and hub bearing thereof
CN115388093A (en) * 2022-07-28 2022-11-25 重庆长安汽车股份有限公司 Sealing device, bearing, wheel hub and vehicle of bearing
WO2024179029A1 (en) * 2023-11-07 2024-09-06 舍弗勒技术股份两合公司 Bearing device having seal assembly

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