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JP5408764B2 - Pack seal - Google Patents

Pack seal Download PDF

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Publication number
JP5408764B2
JP5408764B2 JP2008231201A JP2008231201A JP5408764B2 JP 5408764 B2 JP5408764 B2 JP 5408764B2 JP 2008231201 A JP2008231201 A JP 2008231201A JP 2008231201 A JP2008231201 A JP 2008231201A JP 5408764 B2 JP5408764 B2 JP 5408764B2
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Japan
Prior art keywords
slinger
seal
lip
pack seal
cylindrical portion
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JP2008231201A
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Japanese (ja)
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JP2010065738A (en
Inventor
愛 塩塚
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Uchiyama Manufacturing Corp
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Uchiyama Manufacturing Corp
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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
    • F16C33/78—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
    • F16C33/7883—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 mounted to the inner race and of generally L-shape, the two sealing rings defining a sealing with box-shaped cross-section
    • 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 With Elastic Sealing Lips (AREA)
  • Sealing Of Bearings (AREA)

Description

本発明は、相互に同軸回転する２部材間に介装されるパックシールであって、例えば、自動車等の車輪を支持する軸受部における回転側部材と固定側部材との間に介装され、両部材間の軸受空間をシールするパックシールに関する。   The present invention is a pack seal interposed between two members rotating coaxially with each other, for example, interposed between a rotating side member and a fixed side member in a bearing portion supporting a wheel of an automobile or the like, The present invention relates to a pack seal that seals a bearing space between both members.

自動車用車輪は、内輪、外輪及び内外輪間に介在される転動体によって構成される軸受部を介して回転自在に支持される。そして、転動体が介在される軸受空間は、内外輪間に介装されたシールリングによって密封され、軸受部内に装填された潤滑剤の漏出防止や外部からの汚泥等の浸入の防止が図られている。このシールリングとしては、回転側部材（内輪、外輪のいずれか）に嵌合一体に装着されるスリンガと、該スリンガに弾性摺接するシールリップ部材を固着一体に備えて固定側部材（同上）に嵌合一体に装着される芯金とを組合せて構成される所謂パックシールが多用されるようになった（例えば、特許文献１参照）。   The wheel for motor vehicles is rotatably supported via the bearing part comprised by the rolling element interposed between an inner ring, an outer ring, and an inner and outer ring. The bearing space in which the rolling elements are interposed is sealed by a seal ring interposed between the inner and outer rings, thereby preventing leakage of the lubricant loaded in the bearing portion and preventing entry of sludge from the outside. ing. As this seal ring, a slinger fitted integrally with a rotating side member (either an inner ring or an outer ring) and a seal lip member elastically slidably contacting the slinger are integrally provided on a fixed side member (same as above). A so-called pack seal configured by combining a cored bar that is integrally fitted is used (see, for example, Patent Document 1).

上記スリンガは、回転側部材に嵌合一体に装着される円筒部及びこの円筒部の一端に連設された鍔部を備え、また、芯金は固定側部材に嵌合一体に装着される円筒部及びこの円筒部の一端に連設された鍔部を備える。そして、スリンガと芯金とは、夫々の円筒部及び鍔部が互いに対向するように組合わされ、この状態で軸受部の組立工場に搬入され、軸受部に組付けられる。シールリップ部材は、複数のシールリップを備え、この複数のシールリップは、上記スリンガと芯金とが組合わさった状態で、スリンガの円筒部に弾性的に当接するラジアルリップと、スリンガの鍔部に弾性的に当接するサイドリップ（アキシャルリップ）とより構成される。   The slinger includes a cylindrical portion that is fitted and integrated with the rotating side member, and a flange portion that is connected to one end of the cylindrical portion, and the core metal is a cylindrical shape that is fitted and integrated with the fixed side member. And a collar part provided continuously with one end of the cylindrical part. The slinger and the cored bar are combined so that the cylindrical portion and the flange portion face each other. In this state, the slinger and the cored bar are loaded into the assembly factory of the bearing portion and assembled to the bearing portion. The seal lip member includes a plurality of seal lips, and the plurality of seal lips includes a radial lip that elastically contacts the cylindrical portion of the slinger in a state where the slinger and the metal core are combined, and a slinger collar And a side lip (axial lip) that elastically abuts the lip.

近時、自動車においては、燃費向上の為に、回転トルクの低減化が求められるようになってきた。軸受部においては、シールリップがスリンガに対して弾性摺接するので、この部分での回転トルクが大きく、特に、ラジアルリップはスリンガに対して径方向に嵌合関係で弾性摺接するから、サイドリップに比べて摺接圧が大きく、回転トルクに大きく影響する。また、ラジアルリップの形成スペース（シールリップ基部とスリンガの円筒部との間隔）が小さい為、ラジアルリップのリップ長をサイドリップに比べて短くせざるを得ず、ラジアルリップとスリンガとの摺接摩擦力がラジアルリップによって吸収され難く、これが回転トルクの大きな要因ともなっていた。その為、ラジアルリップの数を減らすことが求められるようになった。特許文献２には、自動車の車輪支持用軸受部に用いられるものでないが、オイルシールとスリーブとよりなり、オイルシールを構成するダストリップが回転シャフトに一体嵌合されるスリーブに形成された凹部内に摺動可能に受入れられ、ダストリップと凹部との作用により、スリーブがオイルシールから離脱することを防止するようにした一体化密封装置が開示されている。
特開２００２−３３３０３３号公報 実開昭６２−６２０６７号公報 Recently, automobiles have been required to reduce rotational torque in order to improve fuel efficiency. In the bearing portion, the seal lip is in elastic sliding contact with the slinger, so the rotational torque at this portion is large.In particular, the radial lip is in elastic sliding contact with the slinger in the radial direction so that it contacts the side lip. Compared to the sliding contact pressure, the rotational torque is greatly affected. Also, since the radial lip forming space (the space between the seal lip base and the slinger cylindrical part) is small, the lip length of the radial lip must be shorter than the side lip, and the sliding contact between the radial lip and the slinger The frictional force is difficult to be absorbed by the radial lip, which has been a major factor in rotational torque. Therefore, it has become necessary to reduce the number of radial lips. Patent Document 2 discloses a recess formed in a sleeve that is not used for a wheel support bearing of an automobile, but includes an oil seal and a sleeve and in which a dust lip constituting the oil seal is integrally fitted to a rotating shaft. An integrated sealing device is disclosed which is slidably received therein and prevents the sleeve from being removed from the oil seal by the action of the dust lip and the recess.
JP 2002-333033 A Japanese Utility Model Publication No. 62-62067

ところで、ラジアルリップを減らすと、スリンガとシールリップ部材を備えた芯金との相互の嵌合力が低下する為、上記のように組合せた状態で輸送する際や、軸受部に組付ける際に、両者がばらけてしまうことがある。特に、多くの種類のパックシールを扱う軸受部の組立工場においては、このようなばらけが生じると、部品間の混同を生じ、組立効率が著しく低下する。また、ラジアルリップを減らすと、それだけシール性が低下するので、これをカバーするため、サイドリップを増やすなどの対策が必要となる。しかし、スリンガの鍔部におけるサイドリップの摺接スペースに限りがあるので、サイドリップを増やすことは、設計上困難な場合が多い。特に、特許文献１のように、環状多極ゴム磁石からなる磁気エンコーダをスリンガの鍔部に固着一体に備える場合、磁性ゴムの一部を鍔部の周縁部に回り込ませるようにして磁気エンコーダが構成されるから、一層上記摺接スペースが制約されることになる。   By the way, if the radial lip is reduced, the mutual fitting force between the slinger and the cored bar provided with the seal lip member is reduced, so when transporting in a combined state as described above or when assembling to the bearing part, Both may fall apart. In particular, in an assembly plant for a bearing section that handles many types of pack seals, if such a variation occurs, confusion between parts occurs, and the assembly efficiency decreases significantly. Further, if the radial lip is reduced, the sealing performance is reduced accordingly. Therefore, in order to cover this, it is necessary to take measures such as increasing the side lip. However, since there is a limit to the sliding contact space of the side lip at the flange of the slinger, it is often difficult to increase the side lip in design. In particular, as in Patent Document 1, in the case where a magnetic encoder made of an annular multipolar rubber magnet is integrally fixed to a slinger collar, the magnetic encoder is arranged so that a part of the magnetic rubber is wrapped around the peripheral edge of the collar. Since it is configured, the sliding contact space is further restricted.

特許文献２の一体化密封装置は、オイルシールとスリーブとを組合せて構成されるから、パックシールの範疇に属するものであるが、スリーブが回転シャフトに嵌合される円筒部のみからなり、オイルシールに形成されるリップはいずれもスリーブに弾性摺接するラジアルリップであって、前記のようなサイドリップを含まないものである。従って、これらラジアルリップのみによって所定のシール性を確保するよう設計する必要があり、上記弾性摺接部での回転トルクの低減化を図らんとする為に、これらリップのスリーブに対する弾接嵌合力を弱め、或いは非接触にすることは不可能であった。   Since the integrated sealing device of Patent Document 2 is configured by combining an oil seal and a sleeve, it belongs to the category of a pack seal. All of the lips formed on the seal are radial lips that are in sliding contact with the sleeve, and do not include the side lips as described above. Therefore, it is necessary to design so as to ensure a predetermined sealing property only by these radial lips, and in order to reduce the rotational torque at the elastic sliding contact portion, the elastic contact fitting force of these lips to the sleeve It was impossible to weaken or make it non-contact.

本発明は、上記実情に鑑みなされたものであり、相互の回転トルクを抑え、スリンガとシールリップ部材を備えた芯金との相互のばらけを効果的に防止する機能を備えたパックシール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 provides a pack seal having a function of suppressing mutual rotation torque and effectively preventing mutual dispersion between a slinger and a metal core provided with a seal lip member. It is intended to provide.

本発明のパックシールは、相互に同軸回転する２部材間に介装されるパックシールであって、上記２部材の一方の部材に嵌合一体に装着される円筒部（以下、スリンガ円筒部と言う）及びこのスリンガ円筒部の一端に連設された鍔部（以下、スリンガ鍔部と言う）を備えるスリンガと、他方の部材に嵌合一体に装着される円筒部（以下、芯金円筒部と言う）及びこの芯金円筒部の一端に連設された鍔部（以下、芯金鍔部と言う）を備える芯金と、該芯金に固着一体とされ上記スリンガに弾性摺接する複数のシールリップを備えるシールリップ部材とよりなり、上記スリンガ鍔部と芯金鍔部とが、軸方向に沿って対向するように組み合わされ、上記複数のシールリップは、上記スリンガ円筒部に弾性摺接するラジアルリップと、上記スリンガ鍔部に弾性摺接するサイドリップとよりなり、該スリンガ円筒部におけるラジアルリップの摺接面には周溝が形成され、該周溝が溝底部となる環状凹段部及び両溝壁部で構成され、ラジアルリップの先端部が当該環状凹段部に弾性摺接することを特徴とする。 The pack seal of the present invention is a pack seal interposed between two members rotating coaxially with each other, and is a cylindrical portion (hereinafter referred to as a slinger cylindrical portion) that is fitted and integrated with one of the two members. And a slinger having a flange portion (hereinafter referred to as a slinger flange portion) connected to one end of the slinger cylindrical portion, and a cylindrical portion (hereinafter referred to as a core metal cylinder portion) fitted and integrated with the other member. And a cored bar provided with one end of the cylindrical core part (hereinafter referred to as a cored bar collar part), and a plurality of members that are integrally fixed to the cored bar and elastically slidably contact the slinger. A seal lip member having a seal lip, wherein the slinger collar part and the core metal collar part are combined so as to face each other along the axial direction, and the plurality of seal lips are in elastic sliding contact with the slinger cylindrical part. Radial lip and the above slinger More becomes elastically and slidably contact with the side lip, the sliding surface of the radial lip in said slinger cylindrical portion circumferential groove is formed, is constituted by an annular recessed step and Ryomizokabe part circumferential groove is the groove bottom, tip of the radial lip and said elastic sliding Sessu Rukoto to the annular recessed step.

本発明において、前記スリンガ円筒部の他端部に、前記芯金鍔部の前記スリンガ鍔部に対向する面とは反対側の位置にまで及ぶ折曲鍔部が連設されているものとしても良い。   In the present invention, the other end portion of the slinger cylindrical portion may be provided with a bent collar portion that extends to a position on the opposite side of the surface of the core bar collar portion that faces the slinger collar portion. good.

また、本発明において、前記一方の部材を回転側部材とし、他方の部材を固定側部材とすることができる。この場合、前記２部材を、軸受ユニットを構成する内輪及び外輪とすることができる。更に、前記スリンガ鍔部の前記芯金鍔部に対向する面とは反対側の面には、環状多極ゴム磁石からなる磁気エンコーダが固着一体とされているものとしても良い。   In the present invention, the one member can be a rotating member, and the other member can be a stationary member. In this case, the two members can be an inner ring and an outer ring constituting the bearing unit. Further, a magnetic encoder made of an annular multipolar rubber magnet may be integrally fixed to a surface of the slinger collar portion opposite to the surface facing the core metal collar portion.

本発明に係るパックシールによれば、上記スリンガ鍔部と芯金鍔部とが、軸方向に沿って対向するように組み合わされた状態で輸送され、相互に同軸回転する２部材間にこの状態で介装される。２部材間に介装される際には、スリンガが該２部材の一方の部材にスリンガ円筒部をして嵌合一体に装着され、また、芯金が他方の部材に芯金円筒部をして嵌合一体に装着される。この状態では、芯金に固着一体とされたシールリップ部材のシールリップがスリンガに弾性的に接し、２部材の相互の軸回転に伴い、ラジアルリップがスリンガ円筒部に、サイドリップがスリンガ鍔部に、夫々弾性摺接する。従って、２部材の相互の軸回転の間、該２部材とパックシールとにより区画される空間がシールされる。   According to the pack seal according to the present invention, the slinger collar part and the core metal collar part are transported in a state of being combined so as to face each other along the axial direction, and in this state between the two members rotating coaxially with each other. It is intervened in. When interposed between two members, the slinger is fitted and integrated with a slinger cylindrical part on one of the two members, and the cored bar has a cylindrical part on the other member. Are fitted together. In this state, the seal lip of the seal lip member fixed integrally with the metal core elastically contacts the slinger, and as the two members rotate axially, the radial lip becomes the slinger cylindrical portion and the side lip becomes the slinger collar portion. In addition, they are in sliding contact with each other. Therefore, during the mutual axial rotation of the two members, the space defined by the two members and the pack seal is sealed.

そして、スリンガ円筒部におけるラジアルリップの摺接面には周溝が形成され、該周溝が環状凹段部とされているから、ラジアルリップの形成スペースを、従来より環状凹段部の段差分大きく確保することができる。その結果、ラジアルリップのリップ長を長くすることができ、これにより、ラジアルリップ自体の弾性が富むことになり、ラジアルリップのスリンガに対する摺接摩擦力の吸収性が高くなって、２部材間の相互の回転トルクが低減化される。この場合、ラジアルリップ自体の弾性が富むことにより、スリンガ円筒部に対する弾性嵌合力が弱まり、この部分のシール性が若干低下する可能性があるが、サイドリップのスリンガ鍔部に対する弾性摺接によってこれがカバーされ、パックシールとしてのシール性に影響を及ぼすことがない。また、スリンガとシールリップ部材を固着一体に備える芯金とが組合わさった状態では、ラジアルリップの先端部が環状凹段部の段壁によって規制され、上記輸送過程や２部材間への介装過程においても、スリンガとシールリップ部材を備える芯金とが離脱して相互にばらけたりすることがない。しかも、環状凹段部はラジアルリップの摺接幅を確保すべくスリンガ円筒部の一部に形成されればよく、スリンガ円筒部の全体が薄肉化されることにはならないから、スリンガ円筒部の剛性の低下を来たす懸念もない。 A circumferential groove is formed on the sliding surface of the radial lip in the slinger cylindrical portion, and the circumferential groove is formed as an annular concave step portion. It can be secured greatly. As a result, the lip length of the radial lip can be increased, thereby increasing the elasticity of the radial lip itself, increasing the absorbability of the sliding frictional force against the slinger of the radial lip and increasing the gap between the two members. The mutual rotational torque is reduced. In this case, due to the elasticity of the radial lip itself, the elastic fitting force to the slinger cylindrical part may be weakened, and the sealing performance of this part may be slightly reduced. Covered and does not affect the sealing performance as a pack seal. Further, in the state where the slinger and the metal core having the seal lip member fixed and integrated are combined, the distal end portion of the radial lip is regulated by the step wall of the annular concave step portion, and the transportation process and the interposition between the two members are performed. Even in the process, the slinger and the cored bar having the seal lip member are not separated and separated from each other. In addition, the annular concave step portion only needs to be formed on a part of the slinger cylindrical portion so as to ensure the sliding contact width of the radial lip, and the entire slinger cylindrical portion is not thinned. There is no concern of lowering rigidity.

本発明において、前記スリンガ円筒部の他端部に、前記芯金鍔部の前記スリンガ鍔部に対向する面とは反対側の位置にまで及ぶ折曲鍔部が連設されているものとした場合、この折曲鍔部とスリンガ鍔部との間に、芯金鍔部及びシールリップ部材が挟装される状態となり、上記ばらけ阻止がより確実になされる。特に、折曲鍔部が芯金鍔部に重なる位置にまで延びているから、振動等によって多少の位置ずれを生じても、金属と弾性体若しくは金属同士の重なりによって、そのばらけ阻止力が強く働くことになる。   In the present invention, the other end portion of the slinger cylindrical portion is provided with a bent collar portion that extends to a position on the opposite side of the surface of the core metal collar portion that faces the slinger collar portion. In this case, the cored bar collar part and the seal lip member are sandwiched between the bent collar part and the slinger collar part, and the above-described scattering prevention is more reliably performed. In particular, since the bent hook portion extends to a position where it overlaps with the core metal hook portion, even if a slight displacement occurs due to vibration or the like, the wrapping prevention force is reduced due to the overlap between the metal and the elastic body or between the metals. I will work hard.

また、本発明において、前記一方の部材を回転側部材とし、他方の部材を固定側部材とし、前記２部材を、軸受ユニットを構成する内輪及び外輪とした場合、軸受空間のシール性が維持され、外部からの軸受空間への水や塵埃等の浸入が阻止され、軸受空間に装填されている潤滑剤（グリス等）の外部への漏出が阻止される。更に、前記スリンガ鍔部の前記芯金鍔部に対向する面とは反対側の面には、環状多極ゴム磁石からなる磁気エンコーダが固着一体とされているものとした場合、固定側に磁気センサを設置することにより回転側部材の回転検出装置を構成することができる。この場合、環状多極ゴム磁石からなる磁気エンコーダをスリンガ鍔部に固着一体とする結果、磁性ゴムの一部がスリンガ鍔部の周縁部に回り込み、スリンガ鍔部におけるシールリップ（サイドリップ）の弾性摺接スペースが制約されることになる。しかし、本発明では、ラジアルリップを減らさなくても回転トルクの低減化を図ることができるから、磁気エンコーダを設けたことによりサイドリップの弾性摺接スペースが制約されることが、回転トルクの低減化に左程障害となることがない。従って、磁気エンコーダを備えるパックシールであっても、上記作用効果を奏するものとなり、これを自動車の車輪用軸受に適用すれば、車輪の回転検出機能を備え、しかも、車輪の回転トルクを抑えて燃費の低減化も図ることができる。   Further, in the present invention, when the one member is a rotation side member, the other member is a fixed side member, and the two members are an inner ring and an outer ring constituting the bearing unit, the sealing performance of the bearing space is maintained. Intrusion of water, dust or the like into the bearing space from the outside is prevented, and leakage of lubricant (such as grease) loaded in the bearing space to the outside is prevented. Further, when a magnetic encoder made of an annular multi-pole rubber magnet is fixed and integrated on the surface of the slinger collar opposite to the surface facing the core metal collar, the magnetic side is fixed on the fixed side. By installing the sensor, a rotation detection device for the rotation side member can be configured. In this case, as a result of the magnetic encoder made of an annular multipolar rubber magnet being fixedly integrated with the slinger collar, a part of the magnetic rubber goes around the peripheral edge of the slinger collar, and the elasticity of the seal lip (side lip) at the slinger collar The sliding contact space is restricted. However, in the present invention, it is possible to reduce the rotational torque without reducing the radial lip. Therefore, the elastic sliding contact space of the side lip is restricted by providing the magnetic encoder. There is no obstacle to the left. Therefore, even a pack seal having a magnetic encoder has the above-described effects, and if this is applied to a wheel bearing for an automobile, it has a function for detecting the rotation of the wheel, and further reduces the rotational torque of the wheel. Fuel consumption can also be reduced.

以下に本発明の最良の実施の形態について、図面に基づいて説明する。図１は本発明の一実施形態のパックシールを用いて組立てられた軸受ユニットの一例を示す縦断面図、図２は図１におけるＸ部の拡大図、図３（ａ）（ｂ）は同パックシールの組立て要領を示し、（ａ）は組立て前の配置関係を、（ｂ）は組立て完了後の状態を示す断面図である。図４は他の実施形態のパックシールを示す要部断面図である。   The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an example of a bearing unit assembled by using a pack seal according to an embodiment of the present invention, FIG. 2 is an enlarged view of a portion X in FIG. 1, and FIGS. The assembling procedure of the pack seal is shown, (a) is a cross-sectional view showing a positional relationship before assembling, and (b) is a sectional view showing a state after the assembling is completed. FIG. 4 is a cross-sectional view of a main part showing a pack seal of another embodiment.

図１は自動車の車輪を転がり軸受ユニット１により支持する構造の一例を示すものであり、内輪（回転側部材）２を構成するハブ２Ａのハブフランジ２ａにボルト２ｂによりタイヤホイール（不図示）が固定される。また、ハブ２Ａに形成されたスプライン軸孔２ｃには駆動シャフト（不図示）がスプライン嵌合されて、該駆動シャフトの回転駆動力がタイヤホイールに駆動伝達される。そして、ハブ２Ａは内輪部材２Ｂと共に内輪２を構成する。外輪（固定側部材）３は、車体の懸架装置（不図示）に取付固定される。この外輪３と上記内輪２との間に２列の転動体（玉）４…がリテーナ４ａで保持された状態で介装されている。この転動体４…及び内外輪２，３に形成された各軌道面により軸受部（軸受空間）１Ａが構成され、軸受部１Ａを介して、内輪２が外輪３に対して軸回転可能に支持される。２列の転動体（玉）４…の軌道面の軸方向に沿った外側、即ち、上記軸受部１Ａの軸方向両側には、上記転動体４…の転動部に装填される潤滑剤（グリス）の漏出或いは外部からの汚泥等の浸入を防止するためのシールリング（パックシール）５，６が、外輪３と内輪２との間に圧入装着されている。そして、車体側シールリング６に対峙するよう、磁気センサ１２が外輪３又は車体（固定側部材）に設置され、この磁気センサ１２と後記する環状多極ゴム磁石からなる磁気エンコーダ１１とにより、タイヤホイールの回転速度や回転角度等を検出する回転検出装置１３（図２参照）が構成される。   FIG. 1 shows an example of a structure in which a wheel of an automobile is supported by a rolling bearing unit 1. A tire wheel (not shown) is connected to a hub flange 2a of a hub 2A constituting an inner ring (rotation side member) 2 by bolts 2b. Fixed. A drive shaft (not shown) is spline-fitted into the spline shaft hole 2c formed in the hub 2A, and the rotational driving force of the drive shaft is transmitted to the tire wheel. The hub 2A constitutes the inner ring 2 together with the inner ring member 2B. The outer ring (fixed side member) 3 is attached and fixed to a suspension device (not shown) of the vehicle body. Two rows of rolling elements (balls) 4... Are interposed between the outer ring 3 and the inner ring 2 while being held by a retainer 4a. A bearing portion (bearing space) 1A is constituted by the raceway surfaces formed on the rolling elements 4 and the inner and outer rings 2 and 3, and the inner ring 2 is supported so as to be axially rotatable with respect to the outer ring 3 via the bearing portion 1A. Is done. On the outside along the axial direction of the raceway surface of the two rows of rolling elements (balls) 4, that is, on both sides in the axial direction of the bearing portion 1 </ b> A, a lubricant (loaded in the rolling parts of the rolling elements 4. Seal rings (pack seals) 5 and 6 are press fitted between the outer ring 3 and the inner ring 2 to prevent leakage of grease or intrusion of sludge from the outside. A magnetic sensor 12 is installed on the outer ring 3 or the vehicle body (fixed side member) so as to face the vehicle body side seal ring 6, and the magnetic sensor 12 and a magnetic encoder 11 made of an annular multipolar rubber magnet to be described later, A rotation detection device 13 (see FIG. 2) for detecting the rotation speed and rotation angle of the wheel is configured.

図２は、車体側シールリング６の装着部の拡大断面図を示す。該シールリング６は、上記内輪部材（回転側部材）２Ｂの外周（外径面）に嵌合一体に装着される円筒部（スリンガ円筒部）７ａ及びこのスリンガ円筒部７ａの一端に連設された外向鍔部（スリンガ鍔部）７ｂを備えるスリンガ７と、外輪（固定側部材）３に嵌合一体に装着される円筒部（芯金円筒部）８ａ及びこの芯金円筒部８ａの一端に連設された内向鍔部（芯金鍔部）８ｂを備える芯金８と、該芯金８に固着一体とされ上記スリンガ７に弾性摺接する複数のシールリップ９ａ，９ｂを備えるシールリップ部材９とよりなる。シールリング６は、スリンガ７とシールリップ部材９を固着一体に備える芯金８とを組合せて組立てられ、パックシールとして構成される。   FIG. 2 is an enlarged cross-sectional view of the mounting portion of the vehicle body side seal ring 6. The seal ring 6 is connected to a cylindrical portion (slinger cylindrical portion) 7a that is fitted and integrally attached to the outer periphery (outer diameter surface) of the inner ring member (rotation side member) 2B and one end of the slinger cylindrical portion 7a. A slinger 7 having an outward flange (slinger flange) 7b, a cylindrical part (core metal cylindrical part) 8a fitted and fitted to the outer ring (fixed side member) 3 and one end of the core metal cylindrical part 8a. A seal lip member 9 having a core bar 8 having an inward flange portion (core metal rod portion) 8 b provided continuously, and a plurality of seal lips 9 a, 9 b that are fixedly integrated with the core bar 8 and elastically slidably contact the slinger 7. And more. The seal ring 6 is assembled by combining a slinger 7 and a cored bar 8 having a seal lip member 9 fixed and integrated, and is configured as a pack seal.

上記パックシール６は、スリンガ７のスリンガ円筒部７ａ及びスリンガ鍔部７ｂと、芯金８の芯金円筒部８ａ及び芯金鍔部８ｂとが、夫々互いに対向するよう組合わさって構成され、各対向面によって図２のように断面が略方形の空間が形成される。この空間内に上記シールリップ９ａ，９ｂが弾性変形状態で介在される。シールリップ部材９は、ゴムの成型体からなり、基部９ｃをして、芯金８の芯金円筒部８ａ及び芯金鍔部８ｂに固着一体とされ、該基部９ｃよりスリンガ７側に向く複数のシールリップ９ａ，９ｂを備えている。図例では、シールリップ９ａが、スリンガ円筒部７ａの外周に弾性摺接するラジアルリップとされ、２個のシールリップ９ｂが、スリンガ鍔部７ｂの芯金鍔部８ｂに向く面、即ち、反車体側の面（対向面）７ｂａに弾性摺接するサイドリップとされている。シールリップ部材９の基部９ｃは、芯金鍔部８ｂにおける内周縁部で回り込み、前記芯金鍔部８ｂの前記スリンガ鍔部７ｂに対向する面とは反対側（反車体側）８ｂａの面にまで及ぶ回り込み部９ｄを備えている。   The pack seal 6 is configured by combining a slinger cylindrical portion 7a and a slinger collar portion 7b of the slinger 7 and a core metal cylindrical portion 8a and a core metal collar portion 8b of the core metal 8 so as to face each other. A space having a substantially square cross section is formed by the facing surface as shown in FIG. The seal lips 9a and 9b are interposed in this space in an elastically deformed state. The seal lip member 9 is made of a rubber molded body, has a base portion 9c, and is integrally fixed to the core metal cylindrical portion 8a and the core metal collar portion 8b of the core metal 8, and a plurality of the seal lip members 9 facing the slinger 7 side from the base portion 9c. The sealing lips 9a and 9b are provided. In the illustrated example, the seal lip 9a is a radial lip that is elastically slidably contacted with the outer periphery of the slinger cylindrical portion 7a, and the two seal lips 9b face the core metal collar portion 8b of the slinger collar portion 7b, that is, the anti-car The side lip is in sliding contact with the side surface (opposing surface) 7ba. The base 9c of the seal lip member 9 wraps around at the inner peripheral edge of the cored bar collar part 8b, and is on the surface of the cored bar collar part 8b opposite to the surface facing the slinger collar part 7b (on the opposite body side) 8ba. 9d is provided.

上記スリンガ鍔部７ｂの芯金鍔部８ｂに対向する面（上記対向面７ｂａ）とは反対側の面、即ち、車体側の面（反対向面）７ｂｂには、環状多極ゴム磁石からなる磁気エンコーダ１１が固着一体とされている。環状多極ゴム磁石は、ゴム材に磁性粉末を混練し、この混練物をスリンガ鍔部７ｂの上記反対向面７ｂｂに加硫一体に成型した後、その周方向に沿って多数のＮ極及びＳ極を、交互及び等間隔に着磁形成したものである。磁気エンコーダ１１は、上記混練物を、スリンガ鍔部７ｂの外周縁部７ｂｃを回り込むように成型して構成される為、その一部１１ａがスリンガ鍔部７ｂの上記対向面７ｂａにまで及んでいる。   The surface of the slinger collar portion 7b opposite to the surface facing the core metal collar portion 8b (the opposed surface 7ba), that is, the surface (anti-opposing surface) 7bb on the vehicle body side is made of an annular multipolar rubber magnet. The magnetic encoder 11 is integrally fixed. An annular multipolar rubber magnet is made by kneading a magnetic powder with a rubber material, and molding this kneaded product on the anti-opposing surface 7bb of the slinger flange portion 7b by vulcanization integrally, and then, a number of N poles and S poles are magnetized alternately and at equal intervals. Since the magnetic encoder 11 is formed by molding the kneaded material so as to wrap around the outer peripheral edge portion 7bc of the slinger flange portion 7b, a part 11a extends to the facing surface 7ba of the slinger flange portion 7b. .

スリンガ円筒部７ａの他端側（スリンガ鍔部７ｂの連設側とは反対側）の外周面には周溝７ｃが形成されている。この周溝７ｃの溝底部７ｃａが、前記ラジアルリップ９ａが弾性摺接する環状凹段部とされている。該周溝７ｃは、スリンガ７の成形時に、所定板厚のスリンガ円筒部７ａに切削加工等を施すことによって形成され、スリンガ円筒部７ａ自体は必要な剛性を保有するようになされている。該周溝７ｃは、スリンガ７とシールリップ部材９を固着一体に備える芯金８との組立て状態では、ラジアルリップ９ａの先端部を溝底部（環状凹段部）７ｃａに弾性当接状態で受容する。そして、両溝壁（段壁）部７ｃｂ，７ｃｃの規制作用によって、ラジアルリップ９ａの先端部が、周溝７ｃから外れることなく上記受容状態に維持される。   A circumferential groove 7c is formed on the outer peripheral surface of the other end side of the slinger cylindrical portion 7a (the side opposite to the side where the slinger flange portion 7b is connected). The groove bottom portion 7ca of the circumferential groove 7c is an annular concave step portion with which the radial lip 9a is in elastic sliding contact. The circumferential groove 7c is formed by cutting the slinger cylindrical portion 7a having a predetermined plate thickness when the slinger 7 is molded, and the slinger cylindrical portion 7a itself has necessary rigidity. The circumferential groove 7c receives the tip of the radial lip 9a in an elastic contact state with the groove bottom (annular concave step) 7ca when the slinger 7 and the cored bar 8 provided with the seal lip member 9 are fixed and integrated. To do. And the front-end | tip part of the radial lip 9a is maintained in the said reception state, without remove | deviating from the circumferential groove 7c by the regulation effect | action of both groove wall (step wall) parts 7cb and 7cc.

上記構成のパックシール６の組立て要領について、図３を参照して説明する。先ず、パックシール部材９を固着一体に備えた芯金８を、図３（ａ）に示すように、芯金鍔部８ｂが下になるよう作業台（不図示）の上に平置きする。次いで、磁気エンコーダ１１を固着一体に備えたスリンガ７を、図３（ａ）に示すように、スリンガ円筒部７ａの他端部７ａａが下向きになるよう上記芯金８の上方に同軸的に配置する。そして、スリンガ円筒部７ａを、図３（ａ）の白抜矢示方向に沿って、シールリップ部材９の内径部に押し込んでゆく。このとき、スリンガ円筒部７ａの他端部７ａａが、ラジアルリップ９ａに作用して、該ラジアルリップ９ａを拡開方向に弾性変形させる。更に、スリンガ円筒部７ａを押し込んでゆくと、ラジアルリップ９ａの先端部が前記周溝７ｃに嵌まり込み、該周溝７ｃの溝底部（環状凹段部）７ｃａに弾性的に当接した状態で受容される。   An assembling procedure of the pack seal 6 having the above configuration will be described with reference to FIG. First, as shown in FIG. 3 (a), the cored bar 8 having the pack seal member 9 fixedly integrated is laid flat on a work table (not shown) so that the cored bar part 8b faces down. Next, as shown in FIG. 3A, the slinger 7 having the magnetic encoder 11 fixedly integrated is coaxially disposed above the cored bar 8 so that the other end portion 7aa of the slinger cylindrical portion 7a faces downward. To do. Then, the slinger cylindrical portion 7a is pushed into the inner diameter portion of the seal lip member 9 along the white arrow direction in FIG. At this time, the other end portion 7aa of the slinger cylindrical portion 7a acts on the radial lip 9a to elastically deform the radial lip 9a in the expanding direction. Further, when the slinger cylindrical portion 7a is pushed in, the distal end portion of the radial lip 9a is fitted into the circumferential groove 7c and is in elastic contact with the groove bottom portion (annular concave step portion) 7ca of the circumferential groove 7c. Is accepted.

また、２つのサイドリップ９ｂ，９ｂは，その先端部がスリンガ鍔部７ｂの前記対向面７ｂａに弾性当接し、押し込み圧によって、上記押し込み方向に最大限圧縮変形されており、押し込み作用が解除されると、サイドリップ９ｂ，９ｂの復元弾力がスリンガ７を押し戻す方向に作用する。その結果、図３（ｂ）に示すように、ラジアルリップ９ａの先端部が、前記周溝７ｃの前記他端部７ａａ側の溝壁部７ｃｂ及び溝底部（環状凹段部）７ｃａに突っ支棒状に弾接し、サイドリップ９ｂ，９ｂの復元弾力と、ラジアルリップ９ａの弾力とが拮抗した状態に維持されたパックシール６が得られる。   Further, the tip ends of the two side lips 9b, 9b are in elastic contact with the opposing surface 7ba of the slinger flange 7b, and are maximally compressed and deformed in the pushing direction by the pushing pressure, and the pushing action is released. Then, the restoring elasticity of the side lips 9b, 9b acts in a direction to push back the slinger 7. As a result, as shown in FIG. 3B, the distal end portion of the radial lip 9a protrudes from the groove wall portion 7cb and the groove bottom portion (annular concave step portion) 7ca on the other end portion 7aa side of the circumferential groove 7c. The pack seal 6 is obtained which is elastically contacted in a rod shape and is maintained in a state in which the restoring elasticity of the side lips 9b and 9b and the elasticity of the radial lip 9a are antagonistic.

上述のように、周溝７ｃに嵌まり込んだラジアルリップ９ａは、その先端部が溝壁７ｃｂ及び溝底部（環状凹段部）７ｃａに弾性当接状態とされるから、一旦組合わされたスリンガ７及びシールリップ部材９を備える芯金８は、相互に分離することがなく、輸送途中や軸受ユニット１への組み付け工程において、両者がばらけるようなことがない。
尚、上記パックシール６の組立て要領において、磁気エンコーダ１１を固着一体に備えたスリンガ７を、上記とは天地逆にして作業台上に平置きし、この上からシールリップ部材９を固着一体に備えた芯金８を、同様に天地逆にして被せるように嵌合合体するようにしても良い。 As described above, the radial lip 9a fitted in the circumferential groove 7c is elastically in contact with the groove wall 7cb and the groove bottom (annular concave step) 7ca, so that the slinger once combined. 7 and the metal core 8 provided with the seal lip member 9 are not separated from each other, and neither is separated during transportation or in the assembly process to the bearing unit 1.
In the assembling procedure of the pack seal 6, the slinger 7 provided with the magnetic encoder 11 is fixed on the work table in an upside down manner, and the seal lip member 9 is fixed and integrated from above. The cored bar 8 provided may be fitted and united so as to be covered upside down in the same manner.

図３（ｂ）に示すように組み立てられたパックシール６は、図１及び図２に示すように、内輪部材２Ｂと外輪３との間に介装される。この介装は、不図示の圧入工具を使用し、スリンガ円筒部７ａを内輪部材２Ｂの外径部に、芯金円筒部８ａを外輪３の内径部に、夫々圧嵌することによりなされる。シールリップ部材９の基部９ｃは、芯金円筒部８ａの他端部（芯金鍔部８ｂの連設側とは反対側の端部）の外周に形成された環状段部８ａａに回り込むよう固着されており、この回り込み部分に環状突部９ｅが形成されている。芯金８の外輪３の内径部への圧嵌の際には、環状突部９ｅが両嵌合面間で環状段部８ａａへのゴム材の逃げを伴いながら圧縮される（図２参照）。従って、環状突部９ｅの復元弾力により、外輪３と芯金円筒部８ａとの嵌合面間が密封され、外部から前記軸受部１Ａ内への水等の浸入が完全に阻止される。   The pack seal 6 assembled as shown in FIG. 3B is interposed between the inner ring member 2B and the outer ring 3 as shown in FIGS. This intervention is performed by using a press-fit tool (not shown) and press-fitting the slinger cylindrical portion 7a to the outer diameter portion of the inner ring member 2B and the cored bar cylindrical portion 8a to the inner diameter portion of the outer ring 3. The base portion 9c of the seal lip member 9 is fixed so as to wrap around the annular step portion 8aa formed on the outer periphery of the other end portion of the core metal cylindrical portion 8a (the end portion on the opposite side to the connecting side of the core bar flange portion 8b). An annular protrusion 9e is formed at the wraparound portion. When the metal core 8 is press-fitted to the inner diameter portion of the outer ring 3, the annular protrusion 9e is compressed between both fitting surfaces with the escape of the rubber material to the annular step portion 8aa (see FIG. 2). . Accordingly, the restoring elasticity of the annular protrusion 9e seals the fitting surface between the outer ring 3 and the cored bar cylindrical portion 8a, and completely prevents the entry of water or the like into the bearing portion 1A from the outside.

上記のように軸受ユニット１における内輪２及び外輪３間に介装されたパックシール６においては、内輪２の軸回転に伴い、ラジアルリップ９ａがスリンガ円筒部７ａにおける周溝７ｃの溝底部（環状凹段部）７ｃａに、２個のサイドリップ９ｂがスリンガ鍔部７ｂの対向面７ｂａに、夫々弾性摺接する。これによって、前記軸受空間１Ａがシールされ、該軸受空間１Ａ内に装填されたグリスの外部への漏出が阻止され、また、外部から軸受空間１Ａ内への汚泥等の浸入が阻止される。この場合、ラジアルリップ９ａの形成スペースは、環状凹段部７ｃａの段差ｄ分大きく確保されるから、ラジアルリップ９ａのリップ長を長くすることができ、それだけラジアルリップ９ａの弾性が富むことになる。従って、内輪２の回転に伴うラジアルリップ９ａとスリンガ７との摺接摩擦がこの弾性に吸収され、これにより内輪２の回転トルクが低減化される。   In the pack seal 6 interposed between the inner ring 2 and the outer ring 3 in the bearing unit 1 as described above, the radial lip 9a is grooved (annular) of the circumferential groove 7c in the slinger cylindrical portion 7a as the shaft of the inner ring 2 rotates. The two side lips 9b are in elastic sliding contact with the opposing surface 7ba of the slinger flange portion 7b. As a result, the bearing space 1A is sealed, the grease loaded in the bearing space 1A is prevented from leaking to the outside, and the entry of sludge and the like into the bearing space 1A from the outside is prevented. In this case, since the formation space of the radial lip 9a is secured large by the step d of the annular concave step portion 7ca, the lip length of the radial lip 9a can be increased, and the elasticity of the radial lip 9a is increased accordingly. . Therefore, the sliding friction between the radial lip 9a and the slinger 7 accompanying the rotation of the inner ring 2 is absorbed by this elasticity, whereby the rotational torque of the inner ring 2 is reduced.

図４は、他の実施形態のパックシールを示し、環状凹段部の形成態様が上記実施形態と異なる。即ち、スリンガ円筒部７の他端部７ａａに、前記周溝７ｃにおける板厚と同じ厚みで連続して、前記芯金鍔部８ｂの前記反対側８ｂａの位置にまで及ぶ折曲鍔部７ｄが連設されている。この折曲鍔部７ｄにより、該折曲鍔部７ｄの屈曲内面が他端部７ａａ側の溝壁部（段壁部）７ｃｂとなる周溝７ｃが形成されている。従って、該周溝７ｃの溝底部７ｃａが、前記と同様、ラジアルリップ９ａが弾性摺接する環状凹段部を構成する。折曲鍔部７ｄは、図３（ａ）に示す組立て前の段階では、図４の２点鎖線で示すようにスリンガ円筒部７ａの他端部７ａａに直状に延出されており、組立て後、この延出部分を図４の矢印のように折曲して形成される。   FIG. 4 shows a pack seal according to another embodiment, and the formation mode of the annular concave step portion is different from the above embodiment. In other words, the bent flange portion 7d extending continuously to the other end portion 7aa of the slinger cylindrical portion 7 with the same thickness as the thickness of the circumferential groove 7c and extending to the position of the opposite side 8ba of the core metal rod portion 8b. It is connected continuously. A circumferential groove 7c is formed by the bent flange portion 7d so that the bent inner surface of the bent flange portion 7d becomes a groove wall portion (step wall portion) 7cb on the other end portion 7aa side. Accordingly, the groove bottom portion 7ca of the circumferential groove 7c constitutes an annular concave step portion with which the radial lip 9a is in elastic sliding contact as described above. In the stage before assembly shown in FIG. 3 (a), the bent collar portion 7d extends straight to the other end portion 7aa of the slinger cylindrical portion 7a as shown by a two-dot chain line in FIG. Thereafter, the extended portion is formed by bending as shown by an arrow in FIG.

上記折曲鍔部７ｄは、スリンガ鍔部７ｂの前記反対側８ｂａの位置にまで及んでいるので、図４に示すような組立て状態では、ラジアルリップ９ａの溝壁部（段壁部）７ｃｂに対する前記と同様の突っ支棒状の弾性当接と、この折曲鍔部７ｄとシールリップ部材９の芯金鍔部８ｂにおける内周縁部での回り込み部９ｄとの軸方向に沿った係止との相乗作用によって、スリンガ７とシールリップ部材９を固着一体に備えた芯金８との相互の分離阻止がより確実になされる。周溝７ｃに受容されたラジアルリップ９ａと溝底部（環状凹段部）７ｃａとの弾性摺接関係は上記と同様であり、従って、回転トルクの低減化も上記と同様に図られる。
その他の構成は上記実施形態と同様であるから、共通部分に同一の符号を付し、その説明を割愛する。 Since the bent flange portion 7d extends to the position of the opposite side 8ba of the slinger flange portion 7b, in the assembled state as shown in FIG. 4, the radial lip 9a has a groove wall portion (step wall portion) 7cb. Similar to the above-described elastic contact of the support rod shape, and the locking along the axial direction of the bent flange portion 7d and the wraparound portion 9d at the inner peripheral edge portion of the core metal flange portion 8b of the seal lip member 9 By the synergistic action, mutual separation prevention between the slinger 7 and the cored bar 8 having the seal lip member 9 fixedly integrated is more reliably performed. The elastic sliding contact relationship between the radial lip 9a received in the circumferential groove 7c and the groove bottom portion (annular concave step portion) 7ca is the same as described above. Therefore, the rotational torque can be reduced as described above.
Since other configurations are the same as those in the above embodiment, common portions are denoted by the same reference numerals, and descriptions thereof are omitted.

尚、上記各実施形態では、内輪２が回転側部材、外輪３が固定側部材である例について述べたが、内輪２が固定側部材、外輪３が回転側部材である場合にも適用可能である。この場合は、スリンガ円筒部７ａが外輪３の内径面に嵌合されると共にスリンガ鍔部７ｂが内向きに形成され、芯金円筒部８ａは内輪２の外径面に嵌合されると共に芯金鍔部８ｂが外向きに形成される。また、磁気エンコーダ付のパックシールについて述べたが、磁気エンコーダを有さないパックシールであっても良い。更に、環状凹段部の形成態様は、例示のものに限定されず、スリンガ７の剛性を低下させずに上記と同様の機能を奏するものであれば、他の形成態様も採用可能である。加えて、自動車の車輪を支持する軸受ユニットに適用した例について述べたが、他の回転部分の軸受ユニットにも本発明のパックシールを適用することができる。   In each of the above embodiments, the inner ring 2 is a rotation side member and the outer ring 3 is a fixed side member. However, the present invention can also be applied to the case where the inner ring 2 is a fixed side member and the outer ring 3 is a rotation side member. is there. In this case, the slinger cylindrical portion 7a is fitted to the inner diameter surface of the outer ring 3 and the slinger collar portion 7b is formed inward, and the cored bar cylindrical portion 8a is fitted to the outer diameter surface of the inner ring 2 and the core. A metal hook portion 8b is formed outward. Moreover, although the pack seal with a magnetic encoder was described, the pack seal which does not have a magnetic encoder may be sufficient. Furthermore, the formation mode of the annular concave step portion is not limited to the illustrated one, and other formation modes can be adopted as long as the same function as described above can be achieved without reducing the rigidity of the slinger 7. In addition, although the example applied to the bearing unit which supports the wheel of a motor vehicle was described, the pack seal | sticker of this invention is applicable also to the bearing unit of another rotation part.

本発明の一実施形態のパックシールを用いて組立てられた軸受ユニットの一例を示す縦断面図である。It is a longitudinal cross-sectional view which shows an example of the bearing unit assembled using the pack seal of one Embodiment of this invention. 図１におけるＸ部の拡大図である。It is an enlarged view of the X section in FIG. （ａ）（ｂ）は同パックシールの組立て要領を示し、（ａ）は組立て前の配置関係を、（ｂ）は組立て完了後の状態を示す断面図である。(A) (b) shows the assembly procedure of the pack seal, (a) is a sectional view before assembly, and (b) is a sectional view showing a state after assembly is completed. 他の実施形態のパックシールを示す要部断面図である。It is principal part sectional drawing which shows the pack seal | sticker of other embodiment.

符号の説明Explanation of symbols

１ 軸受ユニット
１Ａ 軸受部（軸受空間）
２ 内輪（回転側部材、一方の部材）
３ 外輪（固定側部材、他方の部材）
６ パックシール
７ スリンガ
７ａ スリンガ円筒部
７ａａ 他端部
７ｂ スリンガ鍔部
７ｃａ 溝底部（環状凹段部）
７ｄ 屈曲鍔部
８ 芯金
８ａ 芯金円筒部
８ｂ 芯金鍔部
８ｂａ 反対側
９ シールリップ部材
９ａ ラジアルリップ（シールリップ）
９ｂ サイドリップ（シールリップ）
１１ 環状多極ゴム磁石（磁気エンコーダ） 1 Bearing unit 1A Bearing part (bearing space)
2 Inner ring (Rotary member, one member)
3 Outer ring (fixed side member, other member)
6 Pack seal 7 Slinger 7a Slinger cylindrical part 7aa Other end part 7b Slinger collar part 7ca Groove bottom part (annular concave step part)
7d Bending collar part 8 Core metal 8a Core metal cylinder part 8b Core metal collar part 8ba Opposite side 9 Seal lip member 9a Radial lip (seal lip)
9b Side lip (seal lip)
11 Annular multi-pole rubber magnet (magnetic encoder)

Claims (5)

相互に同軸回転する２部材間に介装されるパックシールであって、
上記２部材の一方の部材に嵌合一体に装着される円筒部及びこの円筒部の一端に連設された鍔部を備えるスリンガと、他方の部材に嵌合一体に装着される円筒部及びこの円筒部の一端に連設された鍔部を備える芯金と、該芯金に固着一体とされ上記スリンガに弾性摺接する複数のシールリップを備えるシールリップ部材とよりなり、上記スリンガの鍔部と芯金の鍔部とが、軸方向に沿って対向するように組み合わされ、
上記複数のシールリップは、上記スリンガの円筒部に弾性摺接するラジアルリップと、上記スリンガの鍔部に弾性摺接するサイドリップとよりなり、該スリンガの円筒部におけるラジアルリップの摺接面には周溝が形成され、該周溝が溝底部となる環状凹段部及び両溝壁部で構成され、ラジアルリップの先端部が当該環状凹段部に弾性摺接することを特徴とするパックシール。 A pack seal interposed between two members rotating coaxially with each other,
A cylindrical portion that is fitted and integrated with one of the two members, and a slinger that includes a flange portion that is continuously provided at one end of the cylindrical portion, and a cylindrical portion that is fitted and integrated with the other member, and this A cored bar provided with a flange continuously provided at one end of the cylindrical part, and a seal lip member including a plurality of seal lips that are integrally fixed to the cored bar and elastically slidably contact the slinger. The core bar collar is combined so as to face along the axial direction,
The plurality of seal lips are composed of a radial lip that is in elastic sliding contact with the cylindrical portion of the slinger, and a side lip that is in elastic sliding contact with the flange portion of the slinger, and the circumferential lip is in contact with the sliding surface of the radial lip in the cylindrical portion of the slinger. groove is formed, circumferential groove is constituted by the annular recessed step and Ryomizokabe portion serving as a groove bottom portion, the pack seal the tip of the radial lip and said elastic sliding Sessu Rukoto to the annular recessed step . 請求項１に記載のパックシールにおいて、
前記スリンガにおける円筒部の他端部に、前記芯金における鍔部の前記スリンガの鍔部に対向する面とは反対側の位置にまで及ぶ折曲鍔部が連設されていることを特徴とするパックシール。 The pack seal according to claim 1,
The other end portion of the cylindrical portion of the slinger is provided with a bent flange portion that extends to a position on the opposite side of the surface of the flange portion of the core metal that faces the flange portion of the slinger. Pack seal. 請求項１又は２に記載のパックシールにおいて、
前記一方の部材が回転側部材であり、他方の部材が固定側部材であることを特徴とするパックシール。 In the pack seal according to claim 1 or 2,
The pack seal, wherein the one member is a rotation side member and the other member is a fixed side member. 請求項３に記載のパックシールにおいて、
前記２部材が、軸受ユニットを構成する内輪及び外輪であることを特徴とするパックシール。 The pack seal according to claim 3,
The pack seal, wherein the two members are an inner ring and an outer ring constituting a bearing unit. 請求項３又は４に記載のパックシールにおいて、
前記スリンガにおける鍔部の前記芯金の鍔部に対向する面とは反対側の面には、環状多極ゴム磁石からなる磁気エンコーダが固着一体とされていることを特徴とするパックシール。 In the pack seal according to claim 3 or 4,
A pack seal characterized in that a magnetic encoder made of an annular multipolar rubber magnet is fixedly integrated on a surface of the flange portion of the slinger opposite to the surface facing the flange portion of the cored bar.
JP2008231201A 2008-09-09 2008-09-09 Pack seal Expired - Fee Related JP5408764B2 (en)

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JP5408764B2 true JP5408764B2 (en) 2014-02-05

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