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JP5099643B2 - Pack seal - Google Patents
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JP5099643B2 - Pack seal - Google Patents

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JP5099643B2
JP5099643B2 JP2008286330A JP2008286330A JP5099643B2 JP 5099643 B2 JP5099643 B2 JP 5099643B2 JP 2008286330 A JP2008286330 A JP 2008286330A JP 2008286330 A JP2008286330 A JP 2008286330A JP 5099643 B2 JP5099643 B2 JP 5099643B2
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Prior art keywords
slinger
seal
pack seal
pack
interposed
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JP2010112489A (en
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正稚 冨岡
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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
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F16C43/045—Mounting or replacing seals
    • 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)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a packing seal having functions of efficiently preventing a slinger and a core provided with elastic sealing members from loosening. <P>SOLUTION: The packing seal 6 placed between two coaxially-rotating members includes a slinger 7 integrally fit to one of the two coaxially-rotating members, and an elastic sealing member 10 provided with a sealing lip 9. The sealing lip 9 is integrally stuck to a core provided with a cylindrical part 8a integrally fit to the other member and a brim 8b continuously provided to one end of the cylindrical part, and elastically slidably bought into contact with the slinger. Before being placed between the two members, the base part of the sealing lip placed to the cylindrical part of the core is in a combined state where the slinger and the respective cylindrical part and brim are oppositely placed. An elastically contact parts 9d is provided on the peripheral part of the brim of the slinger. When the base part has been placed between the two members, a labyrinth structure is formed in the space where the combined state of the elastic-contact parts is released. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

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、例えば自動車などの車軸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 that rotate coaxially with each other, and is interposed between a rotating side member and a fixed side member in a bearing portion that supports an axle of an automobile, for example. The present invention relates to a pack seal that seals a bearing space between 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嵌合一体に装着される芯金と、スリンガに弾性摺接する弾性シール部材とを組合わせたいわゆるパックシールが多用されるようになった。   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, so that the lubricant loaded in the bearing portion is prevented from leaking out, and attached to an infiltration fitting such as sludge from the outside. So-called pack seals, which are a combination of a cored bar and an elastic seal member that is in sliding contact with the slinger, have come to be frequently used.

スリンガとシール部材とは、軸受部内に組付けられる状態に組合わされて出荷・搬送され、この出荷・搬送時は、取り扱い上或いは軸受部に装着させる際に圧入治具によって圧入させ易いよう、決まった個数毎に一方向に方向性を持たせて積み重ねられる。
このように積み重ねて梱包する際や、製品を取り出して軸受部に介装させる際に、スリンガとシール部材とがばらけてしまうと作業性が悪くなることが問題となっている。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、スリンガとシール部材の再組付が必要となったり、誤組み付け防止のため設備の点検、シールの検査が必要になったりする。 The slinger and the seal member are shipped and transported in a state where they are assembled in the bearing part. At the time of shipment and transport, it is determined so that it can be easily press-fitted by a press-fitting jig for handling or mounting on the bearing part. Each piece is stacked with directionality in one direction.
When stacking and packing in this way, or when taking out a product and interposing it in a bearing portion, if the slinger and the seal member are separated, there is a problem that workability deteriorates. In particular, in assembly plants for bearings that handle many types of pack seals, if such a divergence occurs, it is necessary to reassemble the slinger and the seal member, or check the equipment and seal to prevent incorrect assembly. It becomes necessary to inspect.

下記特許文献１、２には、芯金に固着されたシールリップの基部に径方向内方に突出した外径側係合部（特許文献１ではｒｅｌｉｅｆ２３）を設けたパックシールが記載されている。これらによれば、該外径側係合部の内径を、スリンガの外周縁の外径よりも小さく形成することにより、スリンガとシール部材の分離を防止し、搬送、組付け作業を容易にすることができるとされている。
下記特許文献３には、スリンガの円筒部の一端部を径外側に屈曲形成されたばらけ防止用突部が設けられたパックシールが記載されている。これによれば、芯金に固着されたメインとなるラジアルリップがスリンガの円筒部から外れてしまうことを防止できるとされている。
米国特許第６，１７０，９９２号明細書 特開２００２−２０６５５０号公報 特開２００７−２７０８５９号公報 The following Patent Documents 1 and 2 describe a pack seal in which an outer diameter side engaging portion (relief 23 in Patent Document 1) protruding radially inward is provided at the base of a seal lip fixed to a core metal. . According to these, by forming the inner diameter of the outer diameter side engaging portion smaller than the outer diameter of the outer peripheral edge of the slinger, separation of the slinger and the seal member is prevented, and conveyance and assembly work are facilitated. It is supposed to be possible.
Patent Document 3 below describes a pack seal provided with a protrusion for preventing breakage in which one end of a cylindrical portion of a slinger is bent outward in the diameter. According to this, it is supposed that it is possible to prevent the main radial lip fixed to the core bar from being detached from the cylindrical portion of the slinger.
US Pat. No. 6,170,992 JP 2002-206550 A JP 2007-270859 A

しかしながら、上記特許文献１及び上記特許文献２に記載のパックシールは、スリンガとシール部材とがばらけて分離しないように、スリンガの鍔部の外周縁寄り部分を軸方向内側に全周に亙り断面クランク形に折り曲げて、芯金の外端縁よりも軸方向内側に形成する必要がある。また上記特許文献３に記載のパックシールも、スリンガの円筒部の一端部を径外側に屈曲する必要がある。すなわち、いずれもばらけを防止するために、スリンガの一端部を折曲加工する必要があるため、製造工程が増えてしまう。
更に特許文献１〜３のシール部材は、いずれもスリンガの円筒部に弾性的に当接するラジアルリップを備えたものであり、このラジアルリップの存在により、スリンガとシール部材との相互の嵌合力を保持する構造となっている。
よって回転トルクの低減を図るためには、ラジアルリップを少なく構成することが望ましいが、これらの場合は、両者の嵌合力を保持するため、ラジアルリップを減らすことができず、シールリップの設計自由度が制約される。
また、特許文献１〜３に記載のパックシールは、軸受部に介装される前は、スリンガとシール部材とが分離しないとしても結合状態となっているわけではないので、がたつきが生じる。よって軸受部に介装される前にパックシール内にグリスを封入しているような場合は、封入していたグリスが想定外の場所に付着してしまうという問題もある。またスリンガとシール部材がパックされた状態でも、スリンガとシール部材間にがたつきが生じる場合があり、両者が完全に分離するわけではないが、両者の芯がずれた場合にスリンガの一部が係合部を越え、ばらけが生じるという問題もある。 However, the pack seals described in Patent Document 1 and Patent Document 2 are arranged so that the slinger and the sealing member are not separated and separated from the outer peripheral edge of the slinger's collar part on the entire inner circumference in the axial direction. It is necessary to bend in the shape of a crank section and to be formed on the inner side in the axial direction than the outer edge of the cored bar. The pack seal described in Patent Document 3 also needs to bend one end of the cylindrical portion of the slinger outward in the diameter. That is, since it is necessary to bend one end part of a slinger in order to prevent dispersion | variation in all, a manufacturing process will increase.
Furthermore, the sealing members of Patent Documents 1 to 3 are each provided with a radial lip that elastically contacts the cylindrical portion of the slinger, and due to the presence of this radial lip, the mutual fitting force between the slinger and the sealing member is increased. It has a structure to hold.
Therefore, in order to reduce the rotational torque, it is desirable to reduce the radial lip, but in these cases, the radial lip cannot be reduced and the design of the seal lip is free because the fitting force between the two is maintained. The degree is constrained.
In addition, the pack seals described in Patent Documents 1 to 3 are not connected to each other even if the slinger and the seal member are not separated before being interposed in the bearing portion, and thus rattling occurs. . Therefore, when the grease is enclosed in the pack seal before being inserted into the bearing portion, there is also a problem that the enclosed grease adheres to an unexpected place. Also, even when the slinger and the seal member are packed, rattling may occur between the slinger and the seal member, and the two are not completely separated. There is also a problem that the crossing over the engaging portion causes a variation.

本発明は、前記実情に鑑みなされたものであり、スリンガと弾性シール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-described circumstances, and an object thereof is to provide a pack seal having a function of effectively preventing mutual slackening between a slinger and a cored bar provided with an elastic seal member. .

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、前記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に固着一体とされ前記スリンガに弾性摺接するシールリップ部を備える弾性シール部材とよりなり、前記芯金の円筒部に配された前記シールリップ部の基部は、前記２部材間に介装される前において、前記スリンガと芯金のそれぞれの円筒部及び鍔部が互いに対向するように組合わされた状態で、前記スリンガの鍔部の周縁部に、弾性的に結合状態となるよう形成された弾接部を備えており、前記２部材間に介装されたときには、前記弾接部による前記結合状態が解除された空間に、ラビリンス構造が形成されることを特徴とする。   The pack seal of the present invention is a pack seal interposed between two members that rotate coaxially with each other, and is attached to one member of the two members so as to be fitted together, and at one end of the cylindrical portion. A slinger provided with a flange provided continuously, a cylindrical portion fitted and integrated with the other member, and a core metal provided with a flange provided continuously at one end of the cylindrical portion, and is integrally fixed to the slinger. An elastic seal member having a seal lip portion that is in sliding contact is formed, and a base portion of the seal lip portion disposed in the cylindrical portion of the core metal is disposed between the slinger and the core metal before being interposed between the two members. In a state where the cylindrical portions and the flange portions are combined so as to face each other, the peripheral portion of the flange portion of the slinger is provided with an elastic contact portion formed so as to be elastically coupled. When interposed between members, The coupling state by the contact portion is released space, characterized in that the labyrinth structure is formed.

本発明において、前記弾接部は、肉厚或いは前記スリンガの鍔部の周縁部側に突出して形成されているものとすることができる。また一方の部材が回転側部材、他方の部材が固定側部材であり、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ものとしてもよい。更に前記磁気エンコーダの一部は、スリンガの鍔部の周縁部に回り込むように配されており、前記弾接部は、前記スリンガの鍔部の周縁部に、前記磁気エンコーダの一部を介在させた状態で弾性的に結合状態となるよう形成されているものとしてもよい。そして、本発明において前記結合状態における前記スリンガと前記弾性シール部材とに対して、軸方向に２ｋｇｆ〜２０ｋｇｆの力を加えた場合に前記結合状態が解除されるものとすることができる。   In the present invention, the elastic contact portion may be formed to protrude from the wall thickness or the peripheral edge side of the slinger collar. Further, one member is a rotation side member, the other member is a fixed side member, and an annular multipolar rubber magnet is formed on a surface of the slinger opposite to the surface facing the flange of the core bar. The magnetic encoder may be integrally fixed. Further, a part of the magnetic encoder is arranged so as to wrap around a peripheral part of the slinger collar part, and the elastic contact part interposes a part of the magnetic encoder on a peripheral part of the slinger collar part. It is good also as what is formed so that it may be in a coupled state elastically. And in this invention, when the force of 2kgf-20kgf is applied to the said slinger and the said elastic seal member in the said connection state to an axial direction, the said connection state shall be cancelled | released.

本発明に係るパックシールによれば、前記芯金の円筒部に配された前記シールリップ部の基部は、前記２部材間に介装される前において、前記スリンガと芯金のそれぞれの円筒部及び鍔部が互いに対向するように組合わされた状態で、前記スリンガの鍔部の周縁部に、弾性的に結合状態となるよう形成された弾接部を備えている。よって、２部材間に介装される前において、前記弾接部とスリンガの鍔部の周縁部とは、スリンガとシール部材とがばらけることなく、弾性的に結合状態となっているので、取り扱い性が向上し、出荷の際の梱包作業、製品管理などがし易くなる。また軸受部に介装される前でもスリンガとシール部材とが結合状態となっているので、がたつきが生じることがない。よって軸受部に介装される前にパックシール内にグリスを封入しているような場合でも、グリスを保持でき、想定外の場所に付着してしまうことがない。
更にシールリップ部の形状を工夫するだけでよく、従来のようにスリンガを折曲加工する必要がないので、コストアップの懸念がなく、製造に手間がかからない。
そしてスリンガの鍔部の周縁部に、弾性的に結合状態となるようシールリップ部の基部に弾接部が形成されているので、例えばスリンガの円筒部に弾性的に当接するラジアルリップを備えていなくても、スリンガとシール部材との相互の嵌合力を保持することができる。よって回転トルクを低減するためにラジアルリップを減らすことができ、シール部材の設計自由度が増す。
また、２部材間に介装されたときには、前記弾接部による前記結合状態が解除された空間に、ラビリンス構造が形成されるので、パックシールの介装部位への組付性に問題が生じることがなく、シール性が低減されるおそれもない。 According to the pack seal according to the present invention, the base portion of the seal lip portion disposed in the cylindrical portion of the core metal is inserted into the cylindrical portion of the slinger and the core metal before being interposed between the two members. And an elastic contact portion formed so as to be elastically coupled to the peripheral portion of the flange portion of the slinger in a state where the flange portion and the flange portion are combined so as to face each other. Therefore, before being interposed between the two members, the elastic contact portion and the peripheral portion of the slinger flange portion are elastically coupled without the slinger and the seal member being separated. The handling is improved, and the packaging work and product management at the time of shipment are facilitated. Further, since the slinger and the seal member are in a coupled state even before being interposed in the bearing portion, rattling does not occur. Therefore, even when grease is enclosed in the pack seal before being inserted into the bearing portion, the grease can be held and does not adhere to an unexpected place.
Furthermore, it is only necessary to devise the shape of the seal lip portion, and since there is no need to bend the slinger as in the prior art, there is no concern about cost increase, and labor is not required for manufacturing.
Since the elastic contact portion is formed at the base portion of the seal lip portion so as to be elastically coupled to the peripheral portion of the slinger collar portion, for example, a radial lip that elastically contacts the cylindrical portion of the slinger is provided. Even if not, the mutual fitting force between the slinger and the sealing member can be maintained. Therefore, the radial lip can be reduced to reduce the rotational torque, and the degree of freedom in designing the seal member is increased.
Further, when interposed between two members, a labyrinth structure is formed in the space where the combined state by the elastic contact portion is released, so that there is a problem in the assembling property of the pack seal to the interposed portion. There is no possibility that the sealing performance is 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は本発明の第１の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）〜図３（ｃ）は同パックシールを軸受ユニットの軸受部に介装していく状態を段階的に示す縦断面図、図４は複数個の同パックシールを積み重ねた状態を示す縦断面図、図５は同パックシールに磁気エンコーダを備えた例を示した図であり、同軸受部に介装される前の状態を示す縦断面図、図６は図５に示すパックシールの変形例であって、図５と同様図、図７は本発明の第２の実施形態のパックシールであって、図２と同様図、図８（ａ）〜図８（ｃ）は図７に示すパックシールを軸受ユニットの軸受部に介装していく状態を段階的に示す縦断面図である。   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 using the pack seal of the first embodiment of the present invention, FIG. 2 is an enlarged view of a portion X in FIG. 1, and FIGS. (C) is a longitudinal sectional view showing the state in which the same pack seal is interposed in the bearing portion of the bearing unit in stages, FIG. 4 is a longitudinal sectional view showing a state in which a plurality of the same pack seals are stacked, FIG. FIG. 6 is a view showing an example in which the pack seal is provided with a magnetic encoder, a longitudinal sectional view showing a state before being interposed in the bearing portion, and FIG. 6 is a modification of the pack seal shown in FIG. FIG. 7 is a view of the pack seal according to the second embodiment of the present invention. FIG. 8 is a view similar to FIG. 2, and FIGS. 8A to 8C are views of the pack seal shown in FIG. It is a longitudinal cross-sectional view which shows the state which is interposed in the bearing part of a bearing unit in steps.

まず、本発明に係るパックシールの第１の実施形態について、図１〜図４を参照しながら説明する。
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と前記内輪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…の軌道面の軸方向外側、即ち、前記軸受部１Ａの軸方向両側には、前記転動体４…の転動部（軸受空間）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５，６が、外輪３と内輪２との間に圧入装着されており、特に６で使用されているのがパックシールである（以下、６をパックシールという）。 First, a first embodiment of a pack seal according to the present invention will be described with reference to FIGS.
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 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 on the outer ring 3 so as to be axially rotatable via the bearing portion 1A. Lubricants loaded in the rolling portions (bearing spaces) of the rolling elements 4 on the outer side in the axial direction of the raceway surfaces of the two rows of rolling elements (balls) 4, that is, on both sides in the axial direction of the bearing portion 1A. Seal rings 5 and 6 for preventing (grease) leakage or entry of sludge from the outside are press-fitted between the outer ring 3 and the inner ring 2, and the pack 6 is used in particular. It is a seal (hereinafter, 6 is referred to as a pack seal).

図２は、車体側に介装されたパックシール６の装着部の拡大断面図を示す。該パックシール６は、前記内輪部材（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７ａ（以下、スリンガ円筒部と言う）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（以下、スリンガ鍔部と言う）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（以下、芯金円筒部と言う）８ａ及びこの芯金円筒部８ａの一端に連設された内向鍔部（以下、芯金鍔部という）８ｂを備える芯金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部９（９ａ、９ｂ）を備えるシール部材１０とよりなる。   FIG. 2 is an enlarged cross-sectional view of a mounting portion of the pack seal 6 interposed on the vehicle body side. The pack seal 6 includes a cylindrical portion 7a (hereinafter referred to as a slinger cylindrical portion) 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 portion (hereinafter referred to as a slinger flange portion) 7b continuously provided on the cylinder, and a cylindrical portion (hereinafter referred to as a core metal cylinder portion) that is fitted and integrated with the outer ring (fixed side member) 3. 8a and a plurality of seal lips that are integrally fixed to a cored bar 8 provided with an inward flange part (hereinafter referred to as a cored bar collar part) 8b that is connected to one end of the cored bar cylindrical part 8a. It consists of the sealing member 10 provided with the part 9 (9a, 9b).

シールリップ部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側に向いて複数構成されている。図例では、スリンガ円筒部７ａの外周面に弾接するシールリップ部９がラジアルリップ９ａとされ、スリンガ鍔部７ｂの反車体側面に弾接するシールリップ９がサイドリップ（アキシャルリップ）９ｂとされている。
シールリップ部９の基部９ｃは、芯金円筒部８ａの他端部（芯金鍔部８ｂが連設されている側とは反対側の端部）の外周に形成された環状段部８ａａに回り込むように固着されており、この回り込み部分９ｆの外輪４側と弾接する部分に環状突部９ｅが形成されている。
また芯金円筒部８ａに配された基部９ｃは、軸受部１Ａに介装される前において、スリンガ鍔部７ｂの周縁部７ｂａに弾接し、弾性的に結合状態となるようゴム材が肉厚に形成された弾接部９ｄを備えている。
なお、シールリップ部９の形状、構成は図例に限定されるものではなく、図７に示すようにラジアルリップ９ａを２個、サイドリップ９ｂを１個備えたものにも適用可能である。 The seal lip portion 9 is formed 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 rod portion 8b of the core metal 8, and is directed to the slinger 7 side from the base portion 9c. There are multiple configurations. In the illustrated example, the seal lip portion 9 that elastically contacts the outer peripheral surface of the slinger cylindrical portion 7a is a radial lip 9a, and the seal lip 9 that elastically contacts the opposite side surface of the slinger collar portion 7b is a side lip (axial lip) 9b. Yes.
The base portion 9c of the seal lip portion 9 is formed on an 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 side where the core metal flange portion 8b is continuously provided). An annular protrusion 9e is formed in a portion that is elastically contacted with the outer ring 4 side of the surrounding portion 9f.
In addition, the base portion 9c disposed in the cored bar cylindrical portion 8a is elastically connected to the peripheral portion 7ba of the slinger flange portion 7b before being interposed in the bearing portion 1A, and the rubber material is thickened so as to be elastically coupled. The elastic contact portion 9d is formed.
Note that the shape and configuration of the seal lip portion 9 are not limited to those shown in the drawings, and may be applied to one having two radial lips 9a and one side lip 9b as shown in FIG.

次にパックシール６の組立て及び軸受部１Ａへの装着要領について、図２〜図４を参照して説明する。図中、１３は軸受部１Ａの装着部位へパックシール６を圧入させるための圧入治具である。
まず、パックシール６の組立て要領について説明する。
シールリップ部９を固着一体に備えた芯金８を、図４に示すように、芯金鍔部８ｂが下になるように作業台（不図示）の上に平置きする。次いで、スリンガ７を図４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に芯金８の上方に同軸的に配置する。このとき、弾接部９ｄとスリンガ鍔部７ｂの周縁部７ｂａとが弾性的に結合されるようスリンガ７を押し込むようにして嵌め合せる。スリンガ鍔部７ｂが芯金鍔部８ｂ方向へ押し込まれることにより、サイドリップ９ｂが押し込み圧を受け、スリンガ鍔部７ｂとシールリップ部９の基部９ｃとの間に形成される空間内で圧縮変形された状態となる。
その結果、図３（ａ）或いは図４に示すように、軸受部１Ａに介装する前のパックシール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及び芯金８の芯金円筒部８ａ及び芯金鍔部８ｂとが、それぞれが互いに対向するよう組合わされ、シールリップ部９の弾接部９ｄとスリンガ鍔部７ｂの周縁部７ｂａとが弾性的に結合状態となる。この結合状態は、スリンガ７とシール部材１０とに対して、軸方向に２ｋｇｆ〜２０ｋｇｆの力を加えた場合に結合状態が解除されるよう構成されている。詳しくは後記する。 Next, the assembly of the pack seal 6 and the mounting procedure to the bearing portion 1A will be described with reference to FIGS. In the figure, reference numeral 13 denotes a press-fitting jig for press-fitting the pack seal 6 into the mounting portion of the bearing portion 1A.
First, the assembly procedure of the pack seal 6 will be described.
As shown in FIG. 4, the cored bar 8 provided with the seal lip part 9 fixedly and integrally is placed flat on a work table (not shown) so that the cored bar part 8b faces down. Next, as shown in FIG. 4, the slinger 7 is coaxially disposed above the core metal 8 so that the other end portion 7aa of the slinger cylindrical portion 7a faces downward. At this time, the slinger 7 is fitted and fitted so that the elastic contact portion 9d and the peripheral edge portion 7ba of the slinger flange portion 7b are elastically coupled. When the slinger collar 7b is pushed in the direction of the core metal collar 8b, the side lip 9b is subjected to a pushing pressure, and is compressed and deformed in the space formed between the slinger collar 7b and the base 9c of the seal lip 9. It will be in the state.
As a result, as shown in FIG. 3A or 4, the pack seal 6 before being inserted into the bearing portion 1 </ b> A is the slinger cylindrical portion 7 a and slinger flange portion 7 b of the slinger 7 and the core metal cylinder of the core metal 8. The part 8a and the cored bar part 8b are combined so that they face each other, and the elastic contact part 9d of the seal lip part 9 and the peripheral part 7ba of the slinger collar part 7b are elastically coupled. This combined state is configured such that the combined state is released when a force of 2 kgf to 20 kgf is applied to the slinger 7 and the seal member 10 in the axial direction. Details will be described later.

図４は軸受部１Ａに介装される前の複数個のパックシール６を積み重ねた状態を示す縦断面図である。
上述の要領で組立てられたパックシール６は、図３（ａ）或いは図４に示すように組合わせたものを完成品として、順次積み重ねられ、梱包、出荷、保管される。
パックシール６の１個当たりの平均重量はおよそ２０ｇであり、これが５０個ぐらい積み重ねられて梱包されるので、最下段に置かれたパックシール６にはおよそ１０００ｇの荷重が加わることになる。
よって、弾性部９ｄと周縁部７ｂａの結合状態は、梱包されている状態で解除されてしまうことがないように、２ｋｇｆ以上の力が加わらないと両者の結合状態が解除されないよう構成される。一方、弾性部９ｄと周縁部７ｂａの結合力が高すぎると、軸受部１Ａの所定部位（内輪部材２Ｂと外輪３との間）にパックシール６を圧入する際に圧入治具１０を用いても結合状態が解除されない場合がある。このような場合は、シール部材１０とスリンガとをばらす必要があったときに、手でばらすことが出来ず、扱い辛くなるので、最高でも２０ｋｇｆの力を加えた場合に、両者の結合状態が解除されるように構成される。
これによれば、弾接部９ｄと周縁部７ｂａとが弾性的に結合状態であり、スリンガ７とシール部材１０とに対して、軸方向に２ｋｇｆ〜２０ｋｇｆの力を加えないと、両者（スリンガ７とシール部材１０）がばらけてしまうことがないので、取り扱い性が向上し、出荷の際の梱包作業、製品管理などがし易くなり、前記両者間にがたつきが生じることがない。また図例のように回り込み部分９ｆの突出量とスリンガ円筒部７ａの他端部７ａａの突出量が同じになるように設計すれば、回り込み部分９ｆが芯金鍔部８ｂの外面側に弾接するとともに、スリンガ円筒部７ａの他端部７ａａが下に重ねられたスリンガ７の折曲角部に当接するので、介装前のパックシール６を整然と積み重ねていくことができる。 FIG. 4 is a longitudinal sectional view showing a state in which a plurality of pack seals 6 are stacked before being interposed in the bearing portion 1A.
The pack seal 6 assembled in the above-described manner is sequentially stacked as a finished product as shown in FIG. 3A or FIG. 4 and packed, shipped, and stored.
The average weight per pack seal 6 is about 20 g, and about 50 of these are stacked and packed, so that a load of about 1000 g is applied to the pack seal 6 placed at the bottom.
Therefore, the combined state of the elastic portion 9d and the peripheral portion 7ba is configured so that the combined state of both is not released unless a force of 2 kgf or more is applied so that the elastic state 9d and the peripheral portion 7ba are not released in the packed state. On the other hand, if the coupling force between the elastic portion 9d and the peripheral edge portion 7ba is too high, a press-fitting jig 10 is used to press-fit the pack seal 6 into a predetermined portion of the bearing portion 1A (between the inner ring member 2B and the outer ring 3). May not be released. In such a case, when the seal member 10 and the slinger need to be separated, they cannot be separated by hand and are difficult to handle. Therefore, when a force of 20 kgf is applied at the maximum, the combined state of the two is Configured to be released.
According to this, the elastic contact portion 9d and the peripheral edge portion 7ba are in an elastically coupled state, and if a force of 2 kgf to 20 kgf is not applied to the slinger 7 and the seal member 10 in the axial direction, both (slinger 7 and the seal member 10) are not separated, handling is improved, packing work at the time of shipment, product management, etc. are facilitated, and no rattling occurs between the two. Further, as shown in the figure, if the projection amount of the sneak portion 9f and the projection amount of the other end portion 7aa of the slinger cylindrical portion 7a are designed to be the same, the sneak portion 9f elastically contacts the outer surface side of the cored bar portion 8b. At the same time, the other end portion 7aa of the slinger cylindrical portion 7a abuts against the bent corner portion of the slinger 7 stacked below, so that the pack seals 6 before the insertion can be stacked in an orderly manner.

また弾接部９ｄはゴム材など弾性力のある素材からなるので、別途治具を用意することなく、手の力で押し込めば容易に図３（ａ）に示す結合状態とすることができる。
これによれば、図例のようにスリンガ円筒部７ａに摺接するラジアル方向に配されたラジアルリップ９ａが一個しかなくても、弾接部９ｄとスリンガ７の周縁部７ｂａとが弾性的に結合状態となるので、スリンガ７とシール部材１０との相互の嵌合力が低下することなく、しっかり組合わさった状態を保持することができる。よってシール部材１０の設計自由度が増し、図例のように回転トルクの低減に配慮したシール設計も可能となる。
なお、パックシール６の組立て要領は、上述の例に限定されるものではなく、スリンガ７を上記とは天地逆にして作業台に平置きし、この上からシール部材１０を被せるように嵌合合体するようにしてもよい。 Further, since the elastic contact portion 9d is made of a material having elasticity such as a rubber material, it can be easily brought into the coupled state shown in FIG.
According to this, even if there is only one radial lip 9a arranged in the radial direction in sliding contact with the slinger cylindrical portion 7a as shown in the figure, the elastic contact portion 9d and the peripheral portion 7ba of the slinger 7 are elastically coupled. Since it will be in a state, the state which the slinger 7 and the sealing member 10 mutually joined can be hold | maintained, without the mutual fitting force falling. Therefore, the degree of freedom in designing the seal member 10 is increased, and a seal design with consideration given to reduction in rotational torque as shown in the figure is possible.
The assembling procedure of the pack seal 6 is not limited to the above example, and the slinger 7 is placed upside down on the work table so as to be reversed from the above, and fitted so that the seal member 10 is covered from above. You may make it unite.

次に、軸受部１Ａへの装着要領を説明する。
上述のように組立てられ、結合状態のパックシール６を取り出し、内輪部材２Ｂと外輪３との間に圧入していく（図３（ａ）参照）。圧入の際には、圧入治具１３が用いられる。ここで用いられる圧入治具１３は図のように押圧部１３ａが平らに形成されている。該圧入治具１３を用いて、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の内径部に圧嵌する。このとき、圧入治具１３によってパックシール６を装着方向（図３（ａ）の矢印方向）に押すと弾接部９ｄとスリンガ７の周縁部７ｂａとの結合状態が解除される（図３（ｂ）参照）。このとき、結合状態のパックシール６は、スリンガ７とシール部材１０とに対して、軸方向（図３（ａ）の矢印方向）に２ｋｇｆ〜２０ｋｇｆの力を加えた場合に、結合状態が解除されるよう構成されているので、圧入する前は結合状態が維持され、圧入治具１３で力を加えるとスムーズに解除をなされる。 Next, how to mount the bearing portion 1A will be described.
The pack seal 6 assembled and assembled as described above is taken out and press-fitted between the inner ring member 2B and the outer ring 3 (see FIG. 3A). When press-fitting, a press-fitting jig 13 is used. The press-fitting jig 13 used here has a flat pressing portion 13a as shown in the figure. Using the press-fitting jig 13, the slinger cylindrical portion 7a is press-fitted to the outer diameter portion of the inner ring member 2B, and the core metal cylindrical portion 8a is press-fitted to the inner diameter portion of the outer ring 3. At this time, when the pack seal 6 is pushed by the press-fitting jig 13 in the mounting direction (the arrow direction in FIG. 3A), the coupled state between the elastic contact portion 9d and the peripheral portion 7ba of the slinger 7 is released (FIG. 3 ( b)). At this time, the combined pack seal 6 is released when a force of 2 kgf to 20 kgf is applied to the slinger 7 and the seal member 10 in the axial direction (arrow direction in FIG. 3A). Therefore, before being press-fitted, the coupled state is maintained, and when a force is applied by the press-fitting jig 13, the release is smoothly performed.

そしてまた圧入治具１３でパックシール６を押していくと、芯金円筒部８ａの環状段部８ａａに回り込むように固着された回り込み部分９ｆが、スリンガ鍔部７ｂより突出しているので、芯金円筒部８ａがスリンガ円筒部８ａよりも先に外輪３の内径部に圧嵌される（図３（ｂ）〜図３（ｃ）参照）。このとき、回り込み部分９ｆが押圧されるに伴って、パックシール６の組立て時に押し込み圧を受け、スリンガ鍔部７ｂとシールリップ部９の基部９ｃとの間に形成される空間内で圧縮変形されたサイドリップ９ｂが、次第にその押し込み圧から解放されていく。   Further, when the pack seal 6 is pushed by the press-fitting jig 13, the wraparound portion 9f fixed so as to wrap around the annular step portion 8aa of the core metal cylindrical portion 8a protrudes from the slinger flange portion 7b. The portion 8a is press-fitted to the inner diameter portion of the outer ring 3 before the slinger cylindrical portion 8a (see FIGS. 3B to 3C). At this time, as the wraparound portion 9f is pressed, the pack seal 6 is subjected to a pressing pressure during assembly, and is compressed and deformed in the space formed between the slinger collar portion 7b and the base portion 9c of the seal lip portion 9. The side lip 9b is gradually released from the pushing pressure.

更に回り込み部分９ｆを押圧部１３ａで押圧していくと、回り込み部分９ｆの車体側面とスリンガ鍔部７ｂの車体側面とが面一になる（図３（ｃ）参照）。すると弾接部９ｄと回り込み部分９ｆとが段差状になっているため、弾接部９ｄと周縁部７ｂａの結合状態が解除された空間にラビリンス構造が形成される。
そして回り込み部分９ｆの車体側面とスリンガ鍔部７ｂの車体側面とを圧入治具１３で圧入していくと、スリンガ円筒部７ａと芯金円筒部８ａとが一緒に内輪部材２Ｂ、外輪３に圧嵌されていき、パックシール６が内輪部材２Ｂと外輪３との間に介装された状態となる。このとき、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。よって環状突部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、外部から軸受部１Ａ内への水などの浸入が阻止される。圧入治具１３の押圧部１３ａが外輪３及び内輪部材２Ｂの車体側面に到達すると、パックシール６が内輪部材２Ｂと外輪３との間に介装された状態となり、押圧され圧縮変形されていたサイドリップ９ｂが、スリンガ鍔部７ｂの反車体側面に、ラジアルリップ９ａがスリンガ円筒部７ａの外周面に、それぞれ弾性摺接される（図２参照）。
よって、軸受部１Ａがシールされ、軸受部１Ａ内に装填されたグリスの外部への漏出が阻止され、また外部から軸受部１Ａ内への汚泥などの侵入が阻止される。 When the wraparound portion 9f is further pressed by the pressing portion 13a, the vehicle body side surface of the wraparound portion 9f and the vehicle body side surface of the slinger collar portion 7b are flush with each other (see FIG. 3C). Then, since the elastic contact portion 9d and the wraparound portion 9f are stepped, a labyrinth structure is formed in the space where the combined state of the elastic contact portion 9d and the peripheral edge portion 7ba is released.
Then, when the vehicle body side surface of the wraparound portion 9f and the vehicle body side surface of the slinger collar portion 7b are press-fitted with the press-fitting jig 13, the slinger cylindrical portion 7a and the core metal cylindrical portion 8a are pressed against the inner ring member 2B and the outer ring 3 together. The pack seal 6 is inserted between the inner ring member 2 </ b> B and the outer ring 3. At this time, the annular protrusion 9e is compressed between the fitting surfaces with the escape of the rubber material to the annular step 8aa. 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, thereby preventing water and the like from entering the bearing portion 1A from the outside. When the pressing portion 13a of the press-fitting jig 13 reaches the vehicle body side surface of the outer ring 3 and the inner ring member 2B, the pack seal 6 is interposed between the inner ring member 2B and the outer ring 3, and is pressed and compressed and deformed. The side lip 9b is elastically slidably contacted with the side of the slinger collar 7b opposite to the vehicle body, and the radial lip 9a is slidably contacted with the outer peripheral surface of the slinger cylindrical portion 7a (see FIG. 2).
Therefore, the bearing portion 1A is sealed, the grease loaded in the bearing portion 1A is prevented from leaking to the outside, and the entry of sludge and the like into the bearing portion 1A from the outside is prevented.

続いて説明する図５は第１の実施形態のパックシール６に磁気エンコーダを備えた場合を示した図であり、図６は図５に示すパックシール６の変形例である。なお、上述の例と共通の部分には同一の符号を付し、説明を割愛する。
ここでは、スリンガ鍔部７ｂの車体側面７ｂｂに、周方向に沿って多数のＮ極、Ｓ極が交互に着磁形成された磁気エンコーダ１１が貼着一体とされたパックシール６を示している。外輪３又は車体の固定側部材には、磁気センサ１２（図１参照）が固定配置されており、磁気エンコーダ１１とにより、タイヤホイールの回転速度を検出する回転検出装置が構成される。磁気エンコーダ１１は、ＮＢＲ、Ｈ−ＮＢＲ、ＡＣＭ、ＡＥＭ、ＦＫＭ等から選ばれたいずれかのゴム材にフェライト系、希土類系等の磁性粉末を事前に混練してなる磁性ゴムシートからなり、周方向に多数のＮ極、Ｓ極が交互に並ぶよう着磁形成されている。磁気エンコーダ１１としては、上述の磁性ゴムからなるものに限定されず、プラスチック磁石、焼結磁石としてもよい。 FIG. 5 to be described next is a view showing a case where the pack seal 6 of the first embodiment is provided with a magnetic encoder, and FIG. 6 is a modification of the pack seal 6 shown in FIG. In addition, the same code | symbol is attached | subjected to the part which is common in the above-mentioned example, and description is omitted.
Here, a pack seal 6 is shown in which a magnetic encoder 11 in which a large number of N poles and S poles are alternately magnetized along the circumferential direction is attached integrally to the vehicle body side surface 7bb of the slinger collar 7b. . A magnetic sensor 12 (see FIG. 1) is fixedly disposed on the outer ring 3 or the stationary side member of the vehicle body, and the magnetic encoder 11 constitutes a rotation detection device that detects the rotation speed of the tire wheel. The magnetic encoder 11 is made of a magnetic rubber sheet obtained by kneading ferrite powder, rare earth magnetic powder or the like in advance with any rubber material selected from NBR, H-NBR, ACM, AEM, FKM, etc. Magnetization is formed so that a large number of N poles and S poles are alternately arranged in the direction. The magnetic encoder 11 is not limited to the one made of the above-described magnetic rubber, and may be a plastic magnet or a sintered magnet.

磁気エンコーダ１１はスリンガ鍔部７ｂの車体側面７ｂｂに加硫接着或いは接着剤を介して固着一体とされている。接着剤としては、エポキシ系或いはフェノール系の接着剤が接着力が強く望ましく採用されるが、シアノ系、エポキシ系、フェノール系、ゴム系、ウレタン系などの接着剤或いは、シーラントやエラストマー系接着剤のような弾性接着剤も使用可能である。
その他、弾接部９ｄを備えており、内輪部材２Ｂと外輪３との間に介装される前は、スリンガ鍔部７ｂの周縁部７ｂａにシールリップ部９の弾接部９ｄが弾性的に結合状態とされる点、結合状態における前記スリンガ７とシール部材１０とに対して、軸方向に２ｋｇｆ〜２０ｋｇｆの力を加えた場合に結合状態が解除される点などは上述の例と同様である。
これによれば、図４のようにパックシール６を積み重ねた場合、磁気エンコーダ１１が、磁気エンコーダ１１より突出して形成されている回り込み部分９ｆによって保護された状態となるので、磁気エンコーダ１１への傷付きを防止できる。また磁気エンコーダ１１より突出して形成されている該回り込み部分９ｆによって、磁気エンコーダ１１の上（或いは下）に芯金鍔部８ｂが直接積み重ねられることがない。よって、磁気エンコーダ１１が持つ磁力によって金属材からなる芯金鍔部８ｂに引き寄せられて、くっついてしまうことがなく、梱包作業や軸受部１Ａの介装作業のときなどにおいて、取り扱い性が向上する。もちろん第１の実施形態におけるパックシール６の効果も備えたものであることはいうまでもない。 The magnetic encoder 11 is integrally fixed to the vehicle body side surface 7bb of the slinger collar 7b through vulcanization adhesion or adhesive. As an adhesive, an epoxy or phenol adhesive is preferably used because of its strong adhesive strength, but a cyano, epoxy, phenol, rubber or urethane adhesive, or a sealant or elastomer adhesive. An elastic adhesive such as can also be used.
In addition, an elastic contact portion 9d is provided, and before being interposed between the inner ring member 2B and the outer ring 3, the elastic contact portion 9d of the seal lip portion 9 is elastically attached to the peripheral edge portion 7ba of the slinger flange portion 7b. The point of being in a coupled state, the point that the coupled state is released when a force of 2 kgf to 20 kgf is applied in the axial direction to the slinger 7 and the seal member 10 in the coupled state are the same as in the above example. is there.
According to this, when the pack seals 6 are stacked as shown in FIG. 4, the magnetic encoder 11 is protected by the wraparound portion 9 f formed to protrude from the magnetic encoder 11. Damage can be prevented. Further, the cored bar portion 8b is not directly stacked on (or below) the magnetic encoder 11 by the wraparound portion 9f formed to protrude from the magnetic encoder 11. Accordingly, the magnetic force of the magnetic encoder 11 is not attracted to and stuck to the cored bar portion 8b made of a metal material, and handling properties are improved during packing work or interposing work of the bearing part 1A. . Of course, it goes without saying that the effect of the pack seal 6 in the first embodiment is also provided.

図６は図５に示すパックシール６の変形例である。
図５に示す例とは磁気エンコーダ１１の一部が、スリンガ鍔部７ｂの周縁部７ｂａに回り込むように配されたエンコーダ回り込み部分１１ａを備えている点で異なる。この場合、弾接部９ｄは、スリンガ鍔部７ｂの周縁部７ｂａに、エンコーダ回り込み部分１１ａを介在させた状態で弾性的に結合状態となるよう形成される。
このように磁気エンコーダ１１の一部をスリンガ鍔部７ｂの周縁部７ｂａに回り込むように配することにより、磁気エンコーダ１１とスリンガ鍔部７ｂの車体側面７ｂｂとの固着関係がより強固になり、外れにくいものとすることができる。よって、上述した第１の実施形態におけるパックシール６の効果も兼ね備えたものでありながら、磁気エンコーダ１１がスリンガ鍔部７ｂの車体側面７ｂｂに強固に固着されたものとすることができる。また磁気エンコーダ１１が磁性ゴムシートからなる場合は、このようにエンコーダ回り込み部分１１ａが、弾接部９ｄと周縁部７ｂａとの間に介在することにより、弾性同士が結合状態となるため、軸受部１Ａに介装される前において、スリンガ７とシール部材１０とがよりばらけにくくなる。 FIG. 6 is a modification of the pack seal 6 shown in FIG.
5 is different from the example shown in FIG. 5 in that a part of the magnetic encoder 11 includes an encoder wrap-around portion 11a disposed so as to wrap around the peripheral edge portion 7ba of the slinger flange portion 7b. In this case, the elastic contact portion 9d is formed to be elastically coupled to the peripheral edge portion 7ba of the slinger flange portion 7b with the encoder wraparound portion 11a interposed.
In this way, by arranging a part of the magnetic encoder 11 so as to wrap around the peripheral edge portion 7ba of the slinger flange portion 7b, the fixing relationship between the magnetic encoder 11 and the vehicle body side surface 7bb of the slinger flange portion 7b becomes stronger. It can be difficult. Therefore, the magnetic encoder 11 can be firmly fixed to the vehicle body side surface 7bb of the slinger collar portion 7b while having the effect of the pack seal 6 in the first embodiment described above. Further, when the magnetic encoder 11 is made of a magnetic rubber sheet, since the encoder wrap-around portion 11a is interposed between the elastic contact portion 9d and the peripheral portion 7ba, the elastic members are in a coupled state. Before being interposed in 1A, the slinger 7 and the seal member 10 are more difficult to separate.

次に、本発明に係るパックシールの第２の実施形態について、図７、図８（ａ）〜（ｃ）を参照しながら説明する。なお、上述の例と共通の部分には同一の符号を付し、説明を割愛する。
ここに示す例は、シール部材１０のシールリップ部９の形状が上述の例とは異なる。
芯金８に固着されたシールリップ部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よりスリンガ円筒部７ａの外周面に弾接するラジアルリップ９ａが２個、スリンガ鍔部７ｂの反車体側面に弾接する１個のサイドリップが形成されている。
シールリップ部９の基部９ｃは、芯金円筒部８ａの環状段部８ａａに回り込むように固着されている点、この回り込み部分９ｆの外輪４側と弾接する部分に環状突部９ｅが形成されている点は上述と同様である。
芯金円筒部８ａに配された基部９ｃは、軸受部１Ａに介装される前において、スリンガ鍔部７ｂの周縁部７ｂａに弾接し、弾性的に結合状態となるようゴム材が周縁部７ｂａ側（内径側）へ突出して形成された弾接部９ｄを備えている。
内輪部材２Ｂと外輪３との間に介装される前は、スリンガ鍔部７ｂの周縁部７ｂａにシールリップ部９の弾接部９ｄが弾性的に結合状態とされる点、結合状態における前記スリンガ７とシール部材１０とに対して、軸方向に２ｋｇｆ〜２０ｋｇｆの力を加えた場合に結合状態が解除される点も上述と同様である。
なお、シールリップ部９の形状、構成は図例に限定されるものではなく、図２に示すようにラジアルリップ９ａを１個、サイドリップ９ｂを２個備えたものも適用可能である。 Next, a second embodiment of the pack seal according to the present invention will be described with reference to FIGS. 7 and 8A to 8C. In addition, the same code | symbol is attached | subjected to the part which is common in the above-mentioned example, and description is omitted.
In the example shown here, the shape of the seal lip portion 9 of the seal member 10 is different from the above-described example.
The seal lip portion 9 fixed to the core metal 8 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 the base portion 9c. Further, two radial lips 9a that elastically contact the outer peripheral surface of the slinger cylindrical portion 7a, and one side lip that elastically contacts the side opposite to the vehicle body of the slinger collar portion 7b are formed.
The base portion 9c of the seal lip portion 9 is fixed so as to wrap around the annular step portion 8aa of the core metal cylindrical portion 8a, and an annular protrusion 9e is formed at a portion of the wrap portion 9f that elastically contacts the outer ring 4 side. This is the same as described above.
The base portion 9c disposed in the cored bar cylindrical portion 8a is elastically contacted with the peripheral edge portion 7ba of the slinger flange portion 7b before being interposed in the bearing portion 1A, and the rubber material is in the peripheral edge portion 7ba so as to be elastically coupled. An elastic contact portion 9d formed to protrude to the side (inner diameter side) is provided.
Prior to being interposed between the inner ring member 2B and the outer ring 3, the elastic contact portion 9d of the seal lip portion 9 is elastically coupled to the peripheral edge portion 7ba of the slinger flange portion 7b, and the above-mentioned in the coupled state. The connection state is released when a force of 2 kgf to 20 kgf is applied to the slinger 7 and the seal member 10 in the axial direction in the same manner as described above.
Note that the shape and configuration of the seal lip portion 9 are not limited to those shown in the drawings, and a configuration having one radial lip 9a and two side lips 9b as shown in FIG. 2 is also applicable.

パックシール６の組立て要領は、上述の例と同様に行うことができる。
シールリップ部９を固着一体に備えた芯金８を芯金鍔部８ｂが下になるように作業台（不図示）の上に平置きにし、スリンガ円筒部７ａの他端部７ａａが下向きになるように芯金８の上方に同軸的に配置する。このとき、弾接部９ｄとスリンガ鍔部７ｂの周縁部７ｂａとが弾性的に結合されるようスリンガ７を押し込むようにして嵌め合せれば、シールリップ部９の弾接部９ｄとスリンガ鍔部７ｂの周縁部７ｂａとが弾性的に結合状態となる。
これによれば、両者（スリンガ７とシール部材１０）がばらけてしまうことがなく、取り扱い性が向上し、出荷の際の梱包作業、製品管理などがし易くなり、介装前のパックシール６をきれいに積み重ねていくことができる。
なお、パックシール６の組立て要領は、上述の例に限定されるものではなく、スリンガ７を上記とは天地逆にして作業台に平置きし、この上からシール部材１０を被せるように嵌合合体するようにしてもよい。 The procedure for assembling the pack seal 6 can be performed in the same manner as in the above-described example.
The metal core 8 having the seal lip portion 9 fixed integrally is placed flat on a work table (not shown) so that the metal core collar 8b faces down, and the other end 7aa of the slinger cylindrical portion 7a faces downward. It arrange | positions coaxially above the metal core 8 so that it may become. At this time, if the slinger 7 is pushed and fitted so that the elastic contact portion 9d and the peripheral edge portion 7ba of the slinger flange portion 7b are elastically coupled, the elastic contact portion 9d of the seal lip portion 9 and the slinger flange portion The peripheral portion 7ba of 7b is elastically coupled.
According to this, both (the slinger 7 and the seal member 10) are not separated, the handleability is improved, the packing work at the time of shipment, the product management, etc. are facilitated, and the pack seal before interposing 6 can be stacked neatly.
The assembling procedure of the pack seal 6 is not limited to the above example, and the slinger 7 is placed upside down on the work table so as to be reversed from the above, and fitted so that the seal member 10 is covered from above. You may make it unite.

次に、軸受部１Ａへの装着要領を説明する。
上述のように組立てられ、結合状態のパックシール６を取り出し、内輪部材２Ｂと外輪３との間に圧入していく（図８（ａ）参照）。圧入の際には、上述の例と同様に圧入治具１３が用いられる。ここで用いられる圧入治具１３は図に示すように、回り込み部分９ｆ及び弾接部９ｄの突出具合に応じて形成された段部１３ｂとスリンガ鍔部７ｂを押圧する押圧部１３ａとを備えたものを用いる。段部１３ｂと押圧部１３ａの段差度合いは、上述の結合状態が解除されたときにラビリンスが形成されるよう設計される。 Next, how to mount the bearing portion 1A will be described.
The pack seal 6 assembled and assembled as described above is taken out and press-fitted between the inner ring member 2B and the outer ring 3 (see FIG. 8A). In the press-fitting, the press-fitting jig 13 is used as in the above example. As shown in the figure, the press-fitting jig 13 used here includes a step portion 13b formed according to the protruding state of the wraparound portion 9f and the elastic contact portion 9d and a pressing portion 13a for pressing the slinger collar portion 7b. Use things. The level difference between the stepped portion 13b and the pressing portion 13a is designed so that a labyrinth is formed when the above-described combined state is released.

該圧入治具１３を用いて、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の内径部に圧嵌する。このとき、圧入治具１３によってパックシール６を装着方向（図８（ａ）の矢印方向）に押すと、まず押圧部１３ａによってスリンガ鍔部７ｂが押圧され、弾接部９ｄとスリンガ７の周縁部７ｂａとの結合状態が容易に解除される（図８（ｂ）参照）。更に圧入治具１３でパックシール６を圧入していくと、押圧部１３ａによって押されるスリンガ円筒部８ａが、芯金円筒部８ａよりも先に内輪部材２Ｂの外径部に圧嵌されていく（図８（ｃ）参照）。弾接部９ｄの端部９ｄａを押圧部１３ａの弾接部９ｄ側の側面１３ｃに弾接させた状態で、回り込み部分９ｆが段部１３ｂに弾接するまで圧入治具１３をスライドさせる。すると、弾接部９ｄと周縁部７ｄの結合状態が解除され、その解除された空間にラビリンス構造が形成される。
そして更に回り込み部分９ｆの車体側面とスリンガ鍔部７ｂの車体側面とを圧入治具１３で圧入していくと、スリンガ円筒部７ａと芯金円筒部８ａとが一緒に内輪部材２Ｂ、外輪３に圧嵌されていく。このとき、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。
圧入治具１３の段部１３ｂの押圧面が外輪３の車体側面に到達すると、パックシール６が内輪部材２Ｂと外輪３との間に介装された状態となり、サイドリップ９ｂが、スリンガ鍔部７ｂの反車体側面に、ラジアルリップ９ａがスリンガ円筒部７ａの外周面に、それぞれ弾性摺接される。
ここでは磁気エンコーダ１１を備えていないパックシール６について説明したが、図５に示す例のように磁気エンコーダ１１を備えたものにも適用可能である。 Using the press-fitting jig 13, the slinger cylindrical portion 7a is press-fitted to the outer diameter portion of the inner ring member 2B, and the core metal cylindrical portion 8a is press-fitted to the inner diameter portion of the outer ring 3. At this time, when the pack seal 6 is pushed in the mounting direction (the arrow direction in FIG. 8A) by the press-fitting jig 13, the slinger collar portion 7b is first pressed by the pressing portion 13a, and the elastic contact portion 9d and the periphery of the slinger 7 The coupled state with the portion 7ba is easily released (see FIG. 8B). When the pack seal 6 is further press-fitted with the press-fitting jig 13, the slinger cylindrical portion 8a pressed by the pressing portion 13a is press-fitted to the outer diameter portion of the inner ring member 2B before the cored bar cylindrical portion 8a. (See FIG. 8 (c)). With the end portion 9da of the elastic contact portion 9d elastically contacting the side surface 13c on the elastic contact portion 9d side of the pressing portion 13a, the press-fitting jig 13 is slid until the wraparound portion 9f elastically contacts the step portion 13b. Then, the coupled state of the elastic contact portion 9d and the peripheral edge portion 7d is released, and a labyrinth structure is formed in the released space.
Further, when the vehicle body side surface of the sneak portion 9f and the vehicle body side surface of the slinger collar portion 7b are press-fitted by the press-fitting jig 13, the slinger cylindrical portion 7a and the core metal cylindrical portion 8a are joined together to the inner ring member 2B and the outer ring 3. The press fits. At this time, the annular protrusion 9e is compressed between the fitting surfaces with the escape of the rubber material to the annular step 8aa.
When the pressing surface of the step portion 13b of the press-fitting jig 13 reaches the vehicle body side surface of the outer ring 3, the pack seal 6 is interposed between the inner ring member 2B and the outer ring 3, and the side lip 9b has a slinger collar The radial lip 9a is elastically slidably contacted with the outer peripheral surface of the slinger cylindrical portion 7a on the side opposite to the vehicle body 7b.
Here, the pack seal 6 that does not include the magnetic encoder 11 has been described. However, the present invention can also be applied to a pack seal 6 that includes the magnetic encoder 11 as shown in FIG.

なお、前記各実施形態では、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。更に、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、これに限定されるものではない。   In each of the embodiments described above, the inner ring 2 is a rotation-side member and the outer ring 3 is a fixed-side member. is there. Furthermore, although the example applied to the bearing unit which supports the wheel of a motor vehicle was described, it is not limited to this.

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）〜（ｃ）は同パックシールを軸受ユニットの軸受部に介装していく状態を段階的に示す縦断面図である。(A)-(c) is a longitudinal cross-sectional view which shows the state which inserts the pack seal in the bearing part of a bearing unit in steps. 複数個の同パックシールを積み重ねた状態を示す縦断面図である。It is a longitudinal cross-sectional view which shows the state which accumulated the some pack seal. 同パックシールに磁気エンコーダを備えた例を示した図であり、同軸受部に介装される前の状態を示す縦断面図である。It is the figure which showed the example which provided the magnetic encoder in the pack seal, and is a longitudinal cross-sectional view which shows the state before interposing in the bearing part. 図５に示すパックシールの変形例であって、図５と同様図である。FIG. 6 is a modification of the pack seal shown in FIG. 5 and is the same as FIG. 5. 同パックシールの変形例であって、図２と同様図である。It is a modification of the same pack seal and is the same as FIG. （ａ）〜（ｃ）は図７に示すパックシールを軸受ユニットの軸受部に介装していく状態を段階的に示す縦断面図である。(A)-(c) is a longitudinal cross-sectional view which shows the state which inserts the pack seal shown in FIG. 7 in the bearing part of a bearing unit in steps.

符号の説明Explanation of symbols

１ 軸受ユニット
１Ａ 軸受部
２ 内輪（回転側部材）
３ 外輪（固定側部材）
６ パックシール
７ スリンガ
７ａ スリンガ円筒部
７ｂ スリンガ鍔部
７ｂａ 周縁部
９ シールリップ部
９ａ ラジアルリップ
９ｂ サイドリップ
９ｄ 弾接部
１０ （弾性）シール部材
１１ 磁気エンコーダ DESCRIPTION OF SYMBOLS 1 Bearing unit 1A Bearing part 2 Inner ring | wheel (rotation side member)
3 Outer ring (fixed side member)
6 Pack seal 7 Slinger 7a Slinger cylindrical part 7b Slinger collar part 7ba Peripheral part 9 Seal lip part 9a Radial lip 9b Side lip 9d Elastic contact part 10 (Elastic) Seal member 11 Magnetic encoder

Claims (6)

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、
前記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に固着一体とされ前記スリンガに弾性摺接するシールリップ部を備える弾性シール部材とよりなり、
前記芯金の円筒部に配された前記シールリップ部の基部は、前記２部材間に介装される前において、前記スリンガと芯金のそれぞれの円筒部及び鍔部が互いに対向するように組合わされた状態で、前記スリンガの鍔部の周縁部に、弾性的に結合状態となるよう形成された弾接部を備えており、
前記２部材間に介装されたときには、前記弾接部による前記結合状態が解除された空間に、ラビリンス構造が形成されることを特徴としたパックシール。 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 provided with a flange portion that is connected to one end of the cylindrical portion; a cylindrical portion that is fitted and integrated with the other member; and An elastic seal member including a seal lip portion that is integrally fixed to a cored bar provided with a flange portion that is continuously provided at one end of the cylindrical portion and elastically slidably contacts the slinger;
The base portion of the seal lip portion disposed on the cylindrical portion of the core metal is assembled so that the cylindrical portion and the flange portion of the slinger and the core metal face each other before being interposed between the two members. In a combined state, the elastic peripheral portion of the slinger's collar is provided with a resilient contact portion formed to be elastically coupled,
A pack seal characterized in that, when interposed between the two members, a labyrinth structure is formed in a space in which the coupled state by the elastic contact portion is released. 請求項１に記載のパックシールにおいて、
前記弾接部は、肉厚に形成されてなることを特徴とするパックシール。 The pack seal according to claim 1,
The pack seal is characterized in that the elastic contact portion is formed to be thick. 請求項１に記載のパックシールにおいて、
前記弾接部は、前記スリンガの鍔部の周縁部側に突出して形成されてなることを特徴とするパックシール。 The pack seal according to claim 1,
The pack seal according to claim 1, wherein the elastic contact portion is formed to protrude toward a peripheral edge side of the flange portion of the slinger. 請求項１〜請求項３のいずれか１項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、他方の部材が固定側部材であり、
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 any one of claims 1 to 3,
The one member is a rotation side member, the other member is a fixed side member,
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. 請求項４に記載のパックシールにおいて、
前記磁気エンコーダの一部は、スリンガの鍔部の周縁部に回り込むように配されており、
前記弾接部は、前記スリンガの鍔部の周縁部に、前記磁気エンコーダの一部を介在させた状態で弾性的に結合状態となるよう形成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 4,
A part of the magnetic encoder is arranged to wrap around the peripheral edge of the slinger's collar,
The pack seal according to claim 1, wherein the elastic contact portion is formed to be elastically coupled to a peripheral portion of the flange portion of the slinger with a part of the magnetic encoder interposed. 請求項１〜請求項５のいずれか１項に記載のパックシールにおいて、
前記結合状態における前記スリンガと前記弾性シール部材とに対して、軸方向に２ｋｇｆ〜２０ｋｇｆの力を加えた場合に、前記結合状態が解除されることを特徴とするパックシール。 In the pack seal according to any one of claims 1 to 5,
The pack seal, wherein the combined state is released when a force of 2 kgf to 20 kgf is applied in an axial direction to the slinger and the elastic seal member in the combined state.
JP2008286330A 2008-11-07 2008-11-07 Pack seal Expired - Fee Related JP5099643B2 (en)

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