JP4023405B2 - Pulsar ring for detection of rotation, sealing device and rolling bearing device - Google Patents

Pulsar ring for detection of rotation, sealing device and rolling bearing device Download PDF

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JP4023405B2
JP4023405B2 JP2003196848A JP2003196848A JP4023405B2 JP 4023405 B2 JP4023405 B2 JP 4023405B2 JP 2003196848 A JP2003196848 A JP 2003196848A JP 2003196848 A JP2003196848 A JP 2003196848A JP 4023405 B2 JP4023405 B2 JP 4023405B2
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ring
magnet rotor
seal
magnetic sensor
cover
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JP2005037130A (en
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茂 井上
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JTEKT Corp
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JTEKT 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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a surface to be detected in a multipolar magnet rotor from being damaged by foreign matters. <P>SOLUTION: A pulser ring for detecting rotation comprises a support ring attached to a rotary wheel; and the multipolar magnet rotor that has a surface to be detected, where magnetism is generated, and is attached to the support ring so that the surface to be detected opposes a magnetic sensor. A non-magnetic cover for covering the surface to be detected in the multipolar magnet rotor is attached to the support ring side, and the cover is made of a hard core body, and a soft skin member for covering the core body. <P>COPYRIGHT: (C)2005,JPO&amp;NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、パルサリングおよびこれを備えたシール装置、および、これらを備えた転が り軸受装置に関する。
【０００２】
【従来の技術】
車両の車軸を支持する転がり軸受装置の内部を密封するために用いるシール装置に、車輪等の回転状態を検出する回転検出装置を構成するパルサリングを組み込んだものがある（例えば、特許文献１参照。）。このシール装置は、車体側に非回転に取り付けられる外輪に固定される第１シールリングと、車軸と共に回転する内輪に固定される第２シールリングとを備え、第２シールリングに多極磁石ロータが接着されたものである。
【０００３】
パルサリングを構成する多極磁石ロータは、その回転に対応した磁気を発生させるべく、周方向交互にＮ極、Ｓ極を配置するように磁化されている。そして、内輪と共に回転する多極磁石ロータの回転状態を、外輪側に取り付けられた磁気センサにより、非接触で検出している。
【０００４】
【特許文献１】
特開２００１−２５５３３７号公報
【０００５】
【発明が解決しようとする課題】
上記のようにパルサリングを組み込んだシール装置では、多極磁石ロータの被検出面が、シール装置の外部側に露出しているため、車両の走行に伴い路上等の小石や砂利等の異物が、多極磁石ロータの被検出面に直接に当りやすい構造であり、磁気センサと多極磁石ロータとの間に噛み込んだりして、被検出面が破損するおそれがある構造になっていた。
【０００６】
【課題を解決するための手段】
本発明に係る回転検出用のパルサリングは、回転輪に一体回転可能に取り付けられる支持環と、磁気を発生する被検出面を備え且つこの被検出面が磁気センサと対向する位置に、前記支持環に取り付けられる多極磁石ロータとを備えた回転検出用のパルサリングにおいて、前記支持環側に、前記多極磁石ロータの被検出面を覆い隠す非磁性のカバーを取り付け、このカバーを、硬質の芯体と、この芯体の前記被検出面および前記磁気センサと対 向する側の全面の両方を被覆する軟質の外皮部材とにより構成したことにより、上述した課題を解決している。また、この回転検出用のパルサリングにおいて、好ましくは、前記 支持環を、前記回転輪に嵌合可能な第１円筒部と、前記第１円筒部の軸方向一方側から径 方向に延びる環状板部と、この環状板部から軸方向に円筒状に延びる第２円筒部とにより 構成し、前記第２円筒部の外周面に、前記多極磁石ロータが接着されている。
【０００７】
支持環側にカバーを取り付けるとは、カバーを、支持環に直接取り付ける場合と、多極磁石ロータ等を介して間接的に取り付ける場合を含む。また、上記において、回転輪に取り付ける支持環としては、シール装置における回転輪側に取り付けられるシールリングを兼用してもよく、シールリングとは別体の部材で構成してもよい。
【０００８】
本発明によれば、多極磁石ロータの被検出面をカバーで覆い隠しているため、小石等の異物が、多極磁石ロータの被検出面に直接当るようなことはなく、また異物が、磁気センサと多極磁石ロータの被検出面との間隙に侵入して噛み込んだ場合であっても、その被覆部が多極磁石ロータの被検出面を保護することとなり、被検出面の破損がなくなる。これによって、多極磁石ロータからは磁力線が回転に対応して正確に発生できるようになり、磁気センサと共に構成される回転検出装置における回転検出精度を有効に維持できるようになる。
【０００９】
本発明の実施態様として前記多極磁石ロータを、磁性粉入りのゴムまたは樹脂をベースにして周方向交互にＮ極、Ｓ極を配置するように着磁したものにより構成した。この実施態様の場合、多極磁石ロータをカバーで覆い隠しても、多極磁石ロータから磁気センサに向けて発生する磁力には何らの影響がなくなり、より安定した回転検出性能を発揮できるようになって好ましい。
【００１０】
本発明のシール装置は、非回転輪に第１シールリングを固定し、回転輪に第２シールリングを固定し、少なくとも一方のシールリングに備えるシールリップを他方のシールリングに対して接触させ、前記非同期輪側に取り付けられる磁気センサにより非接触で検出されるパルサリングを設けたシール装置において、前記パルサリングを、回転輪に取り付けられる支持環と、磁気を発生する被検出面を備え且つこの被検出面が磁気センサと対向するように、前記支持環に取り付けられる多極磁石ロータと、多極磁石ロータの被検出面を覆う非磁性のカバーとにより構成し、このカバーを、硬質の芯体と、この芯体の前記被検 出面および前記磁気センサと対向する側の全面の両方を被覆する軟質の外皮部材とにより構成したことにある。
また、本発明の転がり軸受装置は、非回転輪である外輪に第１シールリングを固定し、 回転輪である内輪に第２シールリングを固定し、少なくとも一方のシールリングに備える シールリップを他方のシールリングに対して接触させ、前記非同期輪側に取り付けられる 磁気センサにより非接触で検出されるパルサリングを設けた転がり軸受装置において、前 記パルサリングを、回転輪に取り付けられる支持環と、磁気を発生する被検出面を備え且 つこの被検出面が磁気センサと対向するように、前記支持環に取り付けられる多極磁石ロ ータと、多極磁石ロータの被検出面を覆う非磁性のカバーとにより構成し、このカバーを 、硬質の芯体と、この芯体の前記被検出面および前記磁気センサと対向する側の全面の両 方を被覆する軟質の外皮部材とにより構成したことにある。
【００１１】
【発明の実施の形態】
図１ないし図３を参照して本発明の実施の形態に係るシール装置を説明する。図１は、そのシール装置を備えた転がり軸受の要部拡大断面図、図２は、図１のシール装置が備える第１シールリングの金属環および多極磁石ロータの一部破断を含む斜視図、図３は、図１のシール装置が備える第１シールリングの金属環および多極磁石ロータの分解状態を示す一部破断を含む斜視図である。
【００１２】
図１において、転がり軸受１は、非回転輪としての外輪２と、回転輪としての内輪３と、複数の玉列４と、シール装置５とを備えている。
【００１３】
シール装置５は、第１、第２シールリング１０、２０を備え、パルサリング３１が組み込まれている。
【００１４】
第１シールリング１０は、金属環１３に主、補助、サイドの各シールリップ１４ａ、１４ｂ、１４ｃを被着した構成である。金属環１３は、例えばＪＩＳ規格ＳＵＳ３０４の非磁性ステンレス鋼など、非磁性金属板からなる。第１シールリング１０の金属環１３は、軸方向に沿う円筒部１３ａと、この円筒部１３ａの軸方向一端から径方向内向きに延びる環状板部１３ｂとから構成されている。第１シールリング１０は、その円筒部１３ａが軸方向に沿って外輪２の内周面に圧入されることにより、該外輪２の内周面に固定されている。
【００１５】
第２シールリング２０は、第１シールリング１０とは異なって金属環だけで構成され、例えばＪＩＳ規格ＳＵＳ３０４の非磁性ステンレス鋼など、非磁性金属板を素材にしている。第２シールリング２０は、その外周面に第１シールリング１０の主シールリップ１４ａおよび補助シールリップ１４ｂが接触する軸方向の円筒部２１を備える。この円筒部２１は内輪３の外周面に嵌合して支持環本体として機能する。
【００１６】
また、第２シールリング２０は、円筒部２１の軸方向他方から径方向に延びた環状板部２２を備える。この環状板部２２は、その内側の面に、第１シールリング１０のサイドシールリップ１４ｃが接触すると共に、多極磁石ロータ３３を取り付けるための取り付け部として機能する。
【００１７】
第２シールリング２０の環状板部２２の外側の面には、多極磁石ロータ３３が接着されている。また、多極磁石ロータ３３は、環状板部２２の外周部に嵌合する嵌合筒部３３ｂを有し、側面は環状の被検出面（着磁面）３３ａとして、例えば磁性粉入りのゴムまたは樹脂をベースにして周方向交互にＮ極、Ｓ極を配置するように着磁してなるものである。第２シールリング２０は、第１シールリング１０と共に上記転がり軸受装置の内部を密封するシール装置を構成すると共に、多極磁石ロータ３３を支持する支持環となるものである。
【００１８】
第２シールリング２０の環状板部２２側には、多極磁石ロータ３３の被検出面３３ａを覆い隠して該被検出面３３ａを異物から保護するカバー４０が取り付けられている。カバー４０は、硬質の芯体４１と軟質の外皮部材４３から構成されている。芯体４１は、例えば、所定の剛性を有する非磁性金属環状の芯金からなり、多極磁石ロータ３３の被検出面３３ａに位置する芯体体部４１ａと、この芯体本体部４１ａの外周縁から多極磁石ロータ３３の外周面側に折り曲げられた延設部４１ｂとから構成されている。
【００１９】
外皮部材４３は、芯金４１よりも軟質のゴムまたは合成樹脂等の非磁性材（弾性部材）からなり、芯金４１の全体を被覆している。すなわち、芯金４１は外皮部材４３に成形により埋入された状態になっており、外皮部材４３は、多極磁石ロータ３３の被検出面３３ａを被覆する第１被覆部４３ａと、多極磁石ロータ３３の嵌合筒部３３ｂに嵌合固定される筒状の第２被覆部４３ｂとからなる。
【００２０】
芯金４１の延設部４１ｂと外皮部材４３の第２被覆部４３ｂにより嵌合部が構成されている。そして、カバー４０を第２シールリング２０に取り付けるには、嵌合部を外皮部材４３の弾性力を利用して多極磁石ロータ３３の外周面に嵌着する。外皮部材４３には芯金４１が埋入されているので、カバー４０の嵌着状態は強固なものになる。また、外皮部材４３をゴムから形成した場合には、外皮部材４３は、多極磁石ロータ３３に加硫接着または接着剤により接着することもできる。
【００２１】
カバー４０の内周端面の内径Ｄ１は、図１に示す如く多極磁石ロータ３３の内径Ｄ２と等しいかそれよりも小さく設定されている。本実施の形態では、カバー４０の内周端面の内径Ｄ１は、多極磁石ロータ３３の内径Ｄ２よりも小さく設定されており、カバー４０の内周端部は、多極磁石ロータ３３の内周端部よりも突出している。このようにカバー４０の内周端部を、多極磁石ロータ３３の内周端部よりも突出させることにより、多極磁石ロータ３３の被検出面３３ａの全体をカバー４０で完全に被覆することができる。
【００２２】
なお、カバー４０の外皮部材４３の内側の面４３ｃは、多極磁石ロータ３３の被検出面３３ａに密着していることが好ましい。外皮部材４３を多極磁石ロータ３３の被検出面３３ａに密着させても、外皮部材４３は、ゴム等の軟質材からなるので、被検出面３３ａを傷付けることはない。
【００２３】
磁気センサ３０は、磁気を検出するセンサであり、例えばホール素子、ホールＩＣや磁気抵抗素子等からなり、そのセンサ出力を導出するリード線３０ａと共に、非磁性の素材例えば非磁性の樹脂からなる外装体３５でモールドされている。外装体３５は、磁気センサ３０が多極磁石ロータ３３に軸方向に非接触で対向し且つ磁気センサ３０からのリード線３０ａを不図示の電子回路に接続できるように、固定の外輪２側に適宜支持される。
【００２４】
第２シールリング２０、多極磁石ロータ３３およびカバー４０によりパルサリング３１が構成され、パルサリング３１と磁気センサ３０は、内輪３の回転状態を検出する回転検出装置が構成されている。回転状態には例えば回転位相、回転速度、回転数、回転方向などがある。
【００２５】
このような転がり軸受１において、内輪３が回転すると、内輪３と共に多極磁石ロータ３３も回転する。多極磁石ロータ３３はその回転に対応した磁力線を磁気センサ３０に対して発生する。磁気センサ３０は、その磁力線に基づいて多極磁石ロータ３３の回転状態に対応した検出出力を出力する。このような回転検出において多極磁石ロータ３３の被検出面３３ａがカバー４０により覆い隠されていても、カバー４０が非磁性の芯金４１と非磁性材の外皮部材４３により構成されていることから、磁気センサ３０は多極磁石ロータ３３から発生する磁力線を検出できる。
【００２６】
また、多極磁石ロータ３３の被検出面３３ａは、カバー４０によりその全面を覆われているので、カバー４０は、異物が多極磁石ロータ３３の被検出面３３ａに直接当るのを防止すると共に、異物がカバー４０に当った際に、外皮部材４３は軟質材からなるため、その弾性力により異物の衝撃を緩和し、異物により多極磁石ロータ３３の被検出面３３ａが破損されるおそれはない。
【００２７】
カバー４０の外皮部材４３が多極磁石ロータ３３の被検出面３３ａに密着していることから、異物が多極磁石ロータ３３の被検出面３３ａとカバー４０との間に侵入するのを防止でき、これによって、多極磁石ロータ３３からは回転に正確に対応した磁力線を発生するから、磁気センサ３０で回転状態を高精度に検出できる。
【００２８】
しかも、第２シールリング２０は、第１シールリング１０と共に上記転がり軸受装置の内部を密封するシール装置を構成する部材と、多極磁石ロータ３３を支持する部材とを兼用するため、部品点数の減少を図れる。
【００２９】
図４を参照して本発明の実施の形態に係るシール装置を説明する。このシール装置は、駆動輪である車輪を支持するための転がり軸受装置に組み込まれている。図４では左側が車両アウタ側を、右側が車両インナ側を示す。この転がり軸受装置６１は、外輪６２と、ハブ軸３２と、内輪６３と、複数の玉列４４、４４と、車両アウタ側の第１保持器６ａと、車両インナ側の第２保持器６ｂとを備えている。
【００３０】
外輪６２は、軸方向２列の冠形保持器６ａ、６ｂそれぞれでもって軸方向２列の玉列４４、４４それぞれを介して、ハブ軸３２および内輪６３を軸心Ｏの回りに回転自在に支持している。外輪６２は、径方向外向きのフランジ６２ａが車体のナックル９に対してボルト８で固定されることによって、車体に非回転に固定される。
【００３１】
ハブ軸３２は、その外周面の車両アウタ側に径方向外向きに突出したフランジ３２ａを備え、このフランジ３２ａに、図示省略のブレーキディスクロータならびに車輪が取付けられる。ハブ軸３２は、軸方向に貫通されかつ内周に雌スプラインが形成された中心孔を備える。このハブ軸３２の中心孔に、等速ジョイントの椀形形状をした外輪３９に一体的に形成された軸部４０が、挿入されてスプライン嵌合されると共に、軸部４０の端部にナット４１が螺合されることにより、等速ジョイントの外輪３９とハブ軸３２とが一体化されている。
【００３２】
内輪６３は、ハブ軸３２の車両インナ側の外周面に取り付けられ、ハブ軸３２の車両インナ側端部のかしめつけでハブ軸３２に固定されている。
【００３３】
外輪６２と内輪６３との間の環状空間は、車両アウタ側と車両インナー側それぞれに装着されたシール装置５、３８により密封される。
【００３４】
車両インナー側のシール装置５は、図１から図３に示したシール装置とされる。シール装置５の第１シールリング１０と第２シールリング２０は、予め組合わされ一体とされた状態で、外輪６２と内輪６３の間に挿入される。そして、このシール装置５の第１シールリング１０の金属環１３が外輪６２に固定され、第２シールリング２０の円筒部２１が内輪６３に固定される。
【００３５】
このようなシール装置５を用いた場合、等速ジョイントの軸部４０が回転すると、内輪６３と共に多極磁石ロータ３３も軸心Ｏ回りに回転するため、外輪６２側（車体）に外装体３５を介して固定された磁気センサ３０が、車輪の回転状態を確実に検出できる。磁気センサ３０は、外輪６２に直接取り付けても良い。
【００３６】
図５に示されるシール装置においては、多極磁石ロータ３３と磁気センサ３０とを直径方向に配置したラジアルタイプである。詳しくは、第２シールリング２０は、円筒部２１と、この円筒部２１から径方向外向きに延びる環状板部２６と、この環状板部２６から軸方向一方にほぼ水平に延びる円筒部２７とから構成されている。多極磁石ロータ３３は、筒状に形成され、第２シールリング２０の円筒部２７の外周面に接着されている。
【００３７】
カバー４０が、芯金４１と外皮部材４３からなるのは前記実施の形態と同様であるが、芯体４１の芯体本体部４１ａは、円筒状に形成されている。カバー４０は、第２シールリング２０の円筒部２７に直接嵌合されている。かかる実施の形態もカバー４０で多極磁石ロータ３３を被覆して保護できる。
【００３８】
図６に示す実施の形態においては、シール装置５とは別体にパルサリング３１を取り付けている。詳しくは、パルサリング３１は、第２シールリング２０とは別体とされて支持環５０に、多極磁石ロータ３３を接着したものである。この支持環５０は、内輪３に嵌合固定される円筒部５１と、円筒部５１から径方向外向きに延びる環状板部５３からなる。多極磁石ロータ３３は、環状板部５３に接着され、しかも、カバー４０で被覆されて保護される。カバー４０は、前記図１ないし図３で示したものと同様の構成であるため、その説明を省略する。
【００３９】
この実施の形態は、シール装置５とは別体にパルサリング３１を取り付けた構成であるから、パルサリング３１は、シール装置５側とは無関係に、取り付け位置やスペースに応じて支持環５０および多極磁石ロータ３３の大きさや形状を任意に設定できる利点がある。
【００４０】
図７を参照して本発明のさらに他の実施の形態に係るシール装置を説明すると、このシール装置は、例えば自動車の従動輪側に用いる転がり軸受装置に組み込まれる。この転がり軸受装置は、内輪３が非回転輪（固定輪）とされ、外輪２が回転輪とされる。詳しくは、パルサリング３１は外輪２側に取り付けられている。パルサリング３１を構成する支持環５０は、外輪２の内側端部に嵌合固定される円筒部５１と、円筒部５１から径方向内向きに延びる環状板部５３からなる。
【００４１】
多極磁石ロータ３３は、環状板部５３に接着されると共に、カバー４０に被覆されている。カバー４０は、内周側に環状板部５３に嵌合する嵌合部を有している。尚、環状板部５３は、外輪２の端面に当接し、支持環５０の軸方向の位置決めがなされている。
【００４２】
本発明は、前記それぞれの実施の形態に限定されず、本発明のパルサリング、シール装置や軸受装置の使用対象は特に限定されるものではない。また、パルサリング３１の支持環やカバー４０の芯体４１は、金属以外の非磁性体のものであっても良い。
【００４３】
【発明の効果】
本発明は、カバーにより多極磁石ロータの被検出面を覆い隠しているため、異物が着磁リングの被検出面を破損するおそれはなく、磁気センサの検出精度が低下するのを防止でき、安定した検出が行える。
【図面の簡単な説明】
【図１】本発明の実施形態に係るシール装置を含む転がり軸受の要部拡大断面図
【図２】同第１シールリングの金属環および多極磁石ロータの一部破断を含む斜視図
【図３】同第１シールリングの金属環および多極磁石ロータの分解状態を示す一部破断を含む斜視図
【図４】本発明の実施形態に係るシール装置を組み込んだ転がり軸受装置の断面図
【図５】本発明の他の実施形態を示し、図１に対応する図
【図６】本発明のさらに他の実施形態を示し、図１に対応する図
【図７】本発明のさらに他の実施形態を示し、図１に対応する図
【符号の説明】
２ 外輪
３ 内輪
５ シール装置
１０ 第１シールリング
２０ 第２シールリング
３０ 磁気センサ
３１ パルサリング
３３ 多極磁石ロータ
３３ａ 被検出面
４０ カバー
４１ 芯体
４３ 外皮部材[0001]
BACKGROUND OF THE INVENTION
The present invention, the pulser ring and seal apparatus having the same, and relates Rolling Ri bearing units with these.
[0002]
[Prior art]
A seal device used for sealing the inside of a rolling bearing device that supports an axle of a vehicle incorporates a pulsar ring that constitutes a rotation detection device that detects a rotation state of a wheel or the like (see, for example, Patent Document 1). ). The seal device includes a first seal ring fixed to an outer ring that is non-rotatably attached to the vehicle body side, and a second seal ring fixed to an inner ring that rotates together with the axle, and the second seal ring has a multipolar magnet rotor. Are bonded.
[0003]
The multipolar magnet rotor constituting the pulsar ring is magnetized so that N poles and S poles are alternately arranged in the circumferential direction so as to generate magnetism corresponding to the rotation. And the rotation state of the multi-pole magnet rotor rotating with the inner ring is detected in a non-contact manner by a magnetic sensor attached to the outer ring side.
[0004]
[Patent Document 1]
Japanese Patent Laid-Open No. 2001-255337
[Problems to be solved by the invention]
In the sealing device incorporating the pulsar ring as described above, since the detection surface of the multipolar magnet rotor is exposed to the outside of the sealing device, foreign matter such as pebbles and gravel on the road, etc. The structure easily touches the detected surface of the multipolar magnet rotor, and the detected surface may be damaged by being caught between the magnetic sensor and the multipolar magnet rotor.
[0006]
[Means for Solving the Problems]
The pulsar ring for rotation detection according to the present invention includes a support ring that is attached to a rotating wheel so as to be integrally rotatable, and a detection surface that generates magnetism, and the detection ring is positioned at a position facing the magnetic sensor. In the pulsar ring for rotation detection provided with a multi-pole magnet rotor attached to the non-magnetic cover, a non-magnetic cover that covers the detection surface of the multi-pole magnet rotor is attached to the support ring side, and the cover is attached to a hard core. and body, by constructing the the outer skin member of the soft covering both the detection target surface and the magnetic sensor and the pair toward sides entire surface of the core, solves the above problems. In this rotation detection pulsar ring, preferably, the support ring includes a first cylindrical portion that can be fitted to the rotary wheel, and an annular plate portion that extends in the radial direction from one axial direction of the first cylindrical portion. And a second cylindrical portion extending in a cylindrical shape in the axial direction from the annular plate portion, and the multipolar magnet rotor is bonded to the outer peripheral surface of the second cylindrical portion.
[0007]
Attaching the cover to the support ring side includes a case where the cover is directly attached to the support ring and a case where the cover is attached indirectly via a multipolar magnet rotor or the like. Moreover, in the above, as a support ring attached to a rotary wheel, the seal ring attached to the rotary wheel side in a sealing apparatus may be used, and you may comprise by a member different from a seal ring.
[0008]
According to the present invention, since the detection surface of the multipolar magnet rotor is covered with the cover, foreign objects such as pebbles do not directly contact the detection surface of the multipolar magnet rotor, Even when the magnetic sensor enters the gap between the detection surface of the multipolar magnet rotor and bites into it, the covering part protects the detection surface of the multipolar magnet rotor, and the detection surface is damaged. Disappears. As a result, the magnetic field lines can be accurately generated from the multipolar magnet rotor in response to the rotation, and the rotation detection accuracy in the rotation detection device configured with the magnetic sensor can be effectively maintained.
[0009]
As an embodiment of the present invention, the multipolar magnet rotor is configured by magnetizing so that N poles and S poles are alternately arranged in the circumferential direction on the basis of rubber or resin containing magnetic powder. In this embodiment, even if the multipolar magnet rotor is covered with a cover, there is no influence on the magnetic force generated from the multipolar magnet rotor toward the magnetic sensor so that more stable rotation detection performance can be exhibited. It is preferable.
[0010]
In the sealing device of the present invention, the first seal ring is fixed to the non-rotating wheel, the second seal ring is fixed to the rotating wheel, the seal lip provided in at least one of the seal rings is brought into contact with the other seal ring, In a sealing device provided with a pulsar ring that is detected in a non-contact manner by a magnetic sensor attached to the asynchronous wheel side, the pulsar ring is provided with a support ring attached to a rotating wheel and a detected surface that generates magnetism, and this detected A multi-pole magnet rotor attached to the support ring and a non-magnetic cover that covers a detection surface of the multi-pole magnet rotor so that the surface faces the magnetic sensor, and the cover includes a hard core , lies in the structure by the outer skin member of the soft covering both said test exit surface and the magnetic sensor facing sides over the entire surface of the core.
In the rolling bearing device of the present invention, the first seal ring is fixed to the outer ring that is a non-rotating ring, the second seal ring is fixed to the inner ring that is a rotating ring, and the seal lip provided in at least one of the seal rings is the other. of contacting to the seal ring, the rolling bearing apparatus provided with a pulser ring that is detected in a non-contact manner by a magnetic sensor attached to the asynchronous wheel side, the pre-Symbol pulser, a supporting ring attached to the rotating ring, a magnetic one 且with the detected surface that occurs as the sensed surface is opposed to the magnetic sensor, and the multi-pole magnet b over data attached to the support ring, the cover of non-magnetic covering the detected surface of the multipolar magnetic rotor constituted by a, the cover, a core of hard, and the outer skin member of the soft covering the both of the detection target surface and the magnetic sensor facing sides over the entire surface of the core member Lies in the fact that more configuration.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A sealing device according to an embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is an enlarged cross-sectional view of a main part of a rolling bearing provided with the sealing device, and FIG. 2 is a perspective view including a partially broken metal ring of a first seal ring and a multipolar magnet rotor provided in the sealing device of FIG. 3 is a perspective view including a partially broken view showing a disassembled state of the metal ring of the first seal ring and the multipolar magnet rotor provided in the sealing device of FIG.
[0012]
In FIG. 1, a rolling bearing 1 includes an outer ring 2 as a non-rotating wheel, an inner ring 3 as a rotating wheel, a plurality of ball arrays 4, and a seal device 5.
[0013]
The seal device 5 includes first and second seal rings 10 and 20 and a pulsar ring 31 is incorporated therein.
[0014]
The first seal ring 10 has a configuration in which main, auxiliary, and side seal lips 14 a, 14 b, and 14 c are attached to a metal ring 13. The metal ring 13 is made of a nonmagnetic metal plate such as nonmagnetic stainless steel of JIS standard SUS304. The metal ring 13 of the first seal ring 10 includes a cylindrical portion 13a along the axial direction and an annular plate portion 13b extending radially inward from one axial end of the cylindrical portion 13a. The first seal ring 10 is fixed to the inner peripheral surface of the outer ring 2 by pressing the cylindrical portion 13a into the inner peripheral surface of the outer ring 2 along the axial direction.
[0015]
Unlike the first seal ring 10, the second seal ring 20 is composed of only a metal ring, and is made of a non-magnetic metal plate such as non-magnetic stainless steel of JIS standard SUS304. The second seal ring 20 includes an axial cylindrical portion 21 on the outer peripheral surface of which the main seal lip 14a and the auxiliary seal lip 14b of the first seal ring 10 are in contact. The cylindrical portion 21 is fitted to the outer peripheral surface of the inner ring 3 and functions as a support ring body.
[0016]
The second seal ring 20 includes an annular plate portion 22 that extends in the radial direction from the other axial direction of the cylindrical portion 21. The annular plate portion 22 contacts the inner seal surface with the side seal lip 14c of the first seal ring 10 and functions as an attachment portion for attaching the multipolar magnet rotor 33.
[0017]
A multipolar magnet rotor 33 is bonded to the outer surface of the annular plate portion 22 of the second seal ring 20. Further, the multipolar magnet rotor 33 has a fitting cylinder portion 33b that is fitted to the outer peripheral portion of the annular plate portion 22, and the side surface is an annular detection surface (magnetization surface) 33a, for example, rubber containing magnetic powder. Alternatively, it is magnetized so that N poles and S poles are alternately arranged in the circumferential direction based on a resin. The second seal ring 20 constitutes a seal device that seals the inside of the rolling bearing device together with the first seal ring 10, and serves as a support ring that supports the multipolar magnet rotor 33.
[0018]
A cover 40 is attached to the annular seal 22 side of the second seal ring 20 to cover the detected surface 33a of the multipolar magnet rotor 33 and protect the detected surface 33a from foreign matter. The cover 40 includes a hard core body 41 and a soft outer skin member 43. The core body 41 is made of, for example, a nonmagnetic metal annular core bar having a predetermined rigidity, and includes a core body section 41a positioned on the detection surface 33a of the multipolar magnet rotor 33, and an outside of the core body body section 41a. It is comprised from the extended part 41b bent by the outer peripheral surface side of the multipolar magnet rotor 33 from the periphery.
[0019]
The outer skin member 43 is made of a non-magnetic material (elastic member) such as rubber or synthetic resin that is softer than the core metal 41, and covers the entire core metal 41. That is, the core metal 41 is embedded in the outer skin member 43 by molding, and the outer skin member 43 includes a first covering portion 43a that covers the detected surface 33a of the multipolar magnet rotor 33, and a multipolar magnet. It consists of a cylindrical second covering portion 43b fitted and fixed to the fitting cylinder portion 33b of the rotor 33.
[0020]
The extension portion 41 b of the core metal 41 and the second covering portion 43 b of the outer skin member 43 constitute a fitting portion. In order to attach the cover 40 to the second seal ring 20, the fitting portion is fitted to the outer peripheral surface of the multipolar magnet rotor 33 using the elastic force of the outer skin member 43. Since the core bar 41 is embedded in the outer skin member 43, the cover 40 is firmly attached. Further, when the outer skin member 43 is formed of rubber, the outer skin member 43 can be bonded to the multipolar magnet rotor 33 by vulcanization bonding or an adhesive.
[0021]
The inner diameter D1 of the inner peripheral end face of the cover 40 is set equal to or smaller than the inner diameter D2 of the multipolar magnet rotor 33 as shown in FIG. In the present embodiment, the inner diameter D1 of the inner peripheral end surface of the cover 40 is set smaller than the inner diameter D2 of the multipolar magnet rotor 33, and the inner peripheral end of the cover 40 is the inner periphery of the multipolar magnet rotor 33. It protrudes from the end. In this way, by covering the inner peripheral end of the cover 40 more than the inner peripheral end of the multipolar magnet rotor 33, the entire detected surface 33 a of the multipolar magnet rotor 33 is completely covered with the cover 40. Can do.
[0022]
The inner surface 43 c of the outer cover member 43 of the cover 40 is preferably in close contact with the detected surface 33 a of the multipolar magnet rotor 33. Even if the outer skin member 43 is brought into close contact with the detected surface 33a of the multipolar magnet rotor 33, the outer skin member 43 is made of a soft material such as rubber, so that the detected surface 33a is not damaged.
[0023]
The magnetic sensor 30 is a sensor that detects magnetism, and includes, for example, a Hall element, a Hall IC, a magnetoresistive element, and the like, and a lead wire 30a for deriving the sensor output and an exterior made of a nonmagnetic material, such as a nonmagnetic resin. Molded with the body 35. The outer package 35 is arranged on the fixed outer ring 2 side so that the magnetic sensor 30 faces the multipolar magnet rotor 33 in a non-contact manner in the axial direction and the lead wire 30a from the magnetic sensor 30 can be connected to an electronic circuit (not shown). Supported as appropriate.
[0024]
The pulsar ring 31 is constituted by the second seal ring 20, the multipolar magnet rotor 33 and the cover 40, and the pulsar ring 31 and the magnetic sensor 30 constitute a rotation detection device for detecting the rotation state of the inner ring 3. Examples of the rotation state include a rotation phase, a rotation speed, a rotation speed, and a rotation direction.
[0025]
In such a rolling bearing 1, when the inner ring 3 rotates, the multipolar magnet rotor 33 rotates with the inner ring 3. The multipolar magnet rotor 33 generates magnetic lines of force corresponding to the rotation to the magnetic sensor 30. The magnetic sensor 30 outputs a detection output corresponding to the rotation state of the multipolar magnet rotor 33 based on the magnetic field lines. In such rotation detection, even if the detected surface 33a of the multipolar magnet rotor 33 is covered by the cover 40, the cover 40 is constituted by the nonmagnetic cored bar 41 and the nonmagnetic material skin member 43. Thus, the magnetic sensor 30 can detect the magnetic lines of force generated from the multipolar magnet rotor 33.
[0026]
Further, since the detected surface 33a of the multipolar magnet rotor 33 is covered by the cover 40, the cover 40 prevents foreign matter from directly contacting the detected surface 33a of the multipolar magnet rotor 33. When the foreign matter hits the cover 40, the outer skin member 43 is made of a soft material. Therefore, the impact of the foreign matter is mitigated by the elastic force, and the detected surface 33a of the multipolar magnet rotor 33 may be damaged by the foreign matter. Absent.
[0027]
Since the outer skin member 43 of the cover 40 is in close contact with the detected surface 33a of the multipolar magnet rotor 33, foreign matter can be prevented from entering between the detected surface 33a of the multipolar magnet rotor 33 and the cover 40. As a result, magnetic force lines corresponding to the rotation are generated accurately from the multipolar magnet rotor 33, so that the rotation state can be detected with high accuracy by the magnetic sensor 30.
[0028]
In addition, since the second seal ring 20 serves as both the first seal ring 10 and the member constituting the seal device that seals the inside of the rolling bearing device and the member that supports the multipolar magnet rotor 33, the number of parts is reduced. Reduction can be achieved.
[0029]
A sealing device according to an embodiment of the present invention will be described with reference to FIG. This sealing device is incorporated in a rolling bearing device for supporting wheels that are drive wheels. In FIG. 4, the left side shows the vehicle outer side, and the right side shows the vehicle inner side. The rolling bearing device 61 includes an outer ring 62, a hub shaft 32, an inner ring 63, a plurality of ball rows 44, 44, a first cage 6a on the vehicle outer side, and a second cage 6b on the vehicle inner side. It has.
[0030]
The outer ring 62 is capable of rotating the hub shaft 32 and the inner ring 63 around the axis O via the two rows of ball rows 44 and 44 with two rows of crown-shaped cages 6a and 6b, respectively. I support it. The outer ring 62 is non-rotatably fixed to the vehicle body by fixing a radially outward flange 62a to the knuckle 9 of the vehicle body with a bolt 8.
[0031]
The hub shaft 32 includes a flange 32a projecting radially outward on the outer side of the vehicle outer side, and a brake disc rotor and wheels (not shown) are attached to the flange 32a. The hub shaft 32 includes a central hole that is penetrated in the axial direction and has a female spline formed on the inner periphery. A shaft portion 40 integrally formed with a hook-shaped outer ring 39 of a constant velocity joint is inserted into the center hole of the hub shaft 32 and is spline-fitted, and a nut is attached to the end of the shaft portion 40. 41 is screwed together so that the outer ring 39 of the constant velocity joint and the hub shaft 32 are integrated.
[0032]
The inner ring 63 is attached to the outer peripheral surface of the hub shaft 32 on the vehicle inner side, and is fixed to the hub shaft 32 by caulking the end portion of the hub shaft 32 on the vehicle inner side.
[0033]
The annular space between the outer ring 62 and the inner ring 63 is sealed by seal devices 5 and 38 mounted on the vehicle outer side and the vehicle inner side, respectively.
[0034]
The sealing device 5 on the vehicle inner side is the sealing device shown in FIGS. The first seal ring 10 and the second seal ring 20 of the seal device 5 are inserted between the outer ring 62 and the inner ring 63 in a state where they are combined in advance and integrated. The metal ring 13 of the first seal ring 10 of the seal device 5 is fixed to the outer ring 62, and the cylindrical portion 21 of the second seal ring 20 is fixed to the inner ring 63.
[0035]
When such a seal device 5 is used, when the shaft portion 40 of the constant velocity joint rotates, the multipolar magnet rotor 33 rotates together with the inner ring 63 around the axis O, so that the outer body 35 is disposed on the outer ring 62 side (vehicle body). The magnetic sensor 30 fixed via the wheel can reliably detect the rotational state of the wheel. The magnetic sensor 30 may be directly attached to the outer ring 62.
[0036]
The sealing device shown in FIG. 5 is a radial type in which a multipolar magnet rotor 33 and a magnetic sensor 30 are arranged in the diameter direction. Specifically, the second seal ring 20 includes a cylindrical portion 21, an annular plate portion 26 extending radially outward from the cylindrical portion 21, and a cylindrical portion 27 extending substantially horizontally from the annular plate portion 26 in one axial direction. It is composed of The multipolar magnet rotor 33 is formed in a cylindrical shape and bonded to the outer peripheral surface of the cylindrical portion 27 of the second seal ring 20.
[0037]
The cover 40 is composed of the cored bar 41 and the outer skin member 43 as in the above-described embodiment, but the core body main part 41a of the core body 41 is formed in a cylindrical shape. The cover 40 is directly fitted to the cylindrical portion 27 of the second seal ring 20. Such an embodiment can also be protected by covering the multipolar magnet rotor 33 with the cover 40.
[0038]
In the embodiment shown in FIG. 6, the pulsar ring 31 is attached separately from the sealing device 5. Specifically, the pulsar ring 31 is formed separately from the second seal ring 20, and a multipolar magnet rotor 33 is bonded to the support ring 50. The support ring 50 includes a cylindrical portion 51 that is fitted and fixed to the inner ring 3, and an annular plate portion 53 that extends radially outward from the cylindrical portion 51. The multipolar magnet rotor 33 is bonded to the annular plate portion 53 and is covered and protected by the cover 40. Since the cover 40 has the same configuration as that shown in FIGS. 1 to 3, the description thereof is omitted.
[0039]
Since this embodiment has a configuration in which the pulsar ring 31 is attached separately from the seal device 5, the pulsar ring 31 is independent of the seal device 5 side, and the support ring 50 and the multipolar electrode according to the attachment position and space. There is an advantage that the size and shape of the magnet rotor 33 can be arbitrarily set.
[0040]
A sealing device according to still another embodiment of the present invention will be described with reference to FIG. 7. This sealing device is incorporated in a rolling bearing device used on the driven wheel side of an automobile, for example. In this rolling bearing device, the inner ring 3 is a non-rotating ring (fixed ring) and the outer ring 2 is a rotating ring. Specifically, the pulsar ring 31 is attached to the outer ring 2 side. The support ring 50 constituting the pulsar ring 31 includes a cylindrical portion 51 that is fitted and fixed to the inner end portion of the outer ring 2, and an annular plate portion 53 that extends radially inward from the cylindrical portion 51.
[0041]
The multipolar magnet rotor 33 is bonded to the annular plate portion 53 and covered with the cover 40. The cover 40 has a fitting portion that fits into the annular plate portion 53 on the inner peripheral side. The annular plate portion 53 is in contact with the end face of the outer ring 2 and the support ring 50 is positioned in the axial direction.
[0042]
The present invention is not limited to the above-described embodiments, and the use target of the pulsar ring, the seal device, and the bearing device of the present invention is not particularly limited. The support ring of the pulsar ring 31 and the core body 41 of the cover 40 may be made of a nonmagnetic material other than metal.
[0043]
【The invention's effect】
In the present invention, since the detection surface of the multipolar magnet rotor is covered with the cover, there is no possibility that foreign matter may damage the detection surface of the magnetized ring, and the detection accuracy of the magnetic sensor can be prevented from being lowered. Stable detection can be performed.
[Brief description of the drawings]
FIG. 1 is an enlarged cross-sectional view of a main part of a rolling bearing including a sealing device according to an embodiment of the present invention. FIG. 2 is a perspective view including a partially broken metal ring and a multipolar magnet rotor of the first seal ring. 3] Perspective view including a partially broken view showing a disassembled state of the metal ring and the multi-pole magnet rotor of the first seal ring. [FIG. 4] A cross-sectional view of a rolling bearing device incorporating the seal device according to the embodiment of the present invention. 5 shows another embodiment of the present invention and corresponds to FIG. 1. FIG. 6 shows still another embodiment of the present invention, and corresponds to FIG. 1. FIG. 7 is still another embodiment of the present invention. FIG. 1 shows the embodiment and corresponds to FIG.
2 outer ring 3 inner ring 5 seal device 10 first seal ring 20 second seal ring 30 magnetic sensor 31 pulsar ring 33 multipolar magnet rotor 33a detected surface 40 cover 41 core body 43 outer skin member

Claims (5)

回転輪に一体回転可能に取り付けられる支持環と、磁気を発生する被検出面を備え且つこの被検出面が磁気センサと対向する位置に、前記支持環に取り付けられる多極磁石ロータとを備えた回転検出用のパルサリングにおいて、
前記支持環側に、前記多極磁石ロータの被検出面を覆い隠す非磁性のカバーを取り付け、このカバーを、硬質の芯体と、この芯体の前記被検出面および前記磁気センサと対向す る側の全面の両方を被覆する軟質の外皮部材とにより構成した、回転検出用のパルサリング。A support ring that is attached to the rotating wheel so as to be integrally rotatable, and a multipolar magnet rotor that is provided with a detection surface that generates magnetism and that is to be opposed to the magnetic sensor at a position where the detection surface faces the magnetic sensor. In pulsar ring for rotation detection,
A non-magnetic cover that covers the detection surface of the multipolar magnet rotor is attached to the support ring side, and the cover is opposed to the hard core, the detection surface of the core, and the magnetic sensor. A pulsar ring for rotation detection, which is composed of a soft skin member that covers both of the entire surface of the rotating side. 請求項１に記載の回転検出用のパルサリングにおいて、In the rotation detecting pulsar ring according to claim 1,
前記支持環を、前記回転輪に嵌合可能な第１円筒部と、前記第１円筒部の軸方向一方側A first cylindrical portion capable of fitting the support ring to the rotating wheel; and an axial one side of the first cylindrical portion. から径方向に延びる環状板部と、この環状板部から軸方向に円筒状に延びる第２円筒部とAn annular plate portion extending radially from the second cylindrical portion extending axially from the annular plate portion in an axial direction; により構成し、前記第２円筒部の外周面に、前記多極磁石ロータが接着されている、回転The multipolar magnet rotor is bonded to the outer peripheral surface of the second cylindrical portion. 検出用のパルサリング。Pulsar ring for detection. 請求項１または２に記載の回転検出用のパルサリングにおいて、
前記多極磁石ロータを、磁性粉入りのゴムまたは樹脂をベースに周方向交互にＮ極、Ｓ極を配置するように着磁したものにより構成した、回転検出用のパルサリング。In the rotation detecting pulsar ring according to claim 1 or 2 ,
A pulsar ring for rotation detection, wherein the multi-pole magnet rotor is configured by magnetizing rubber or resin containing magnetic powder so that N poles and S poles are alternately arranged in the circumferential direction. 非回転輪に第１シールリングを固定し、回転輪に第２シールリングを固定し、少なくとも一方のシールリングに備えるシールリップを他方のシールリングに対して接触させ、前記非同期輪側に取り付けられる磁気センサにより非接触で検出されるパルサリングを設けたシール装置において、前記パルサリングを、回転輪に取り付けられる支持環と、磁気を発生する被検出面を備え且つこの被検出面が磁気センサと対向するように、前記支持環に取り付けられる多極磁石ロータと、多極磁石ロータの被検出面を覆う非磁性のカバーとにより構成し、このカバーを、硬質の芯体と、この芯体の前記被検出面および前記磁気セン サと対向する側の全面の両方を被覆する軟質の外皮部材とにより構成した、シール装置。The first seal ring is fixed to the non-rotating wheel, the second seal ring is fixed to the rotating wheel, the seal lip provided on at least one of the seal rings is brought into contact with the other seal ring, and is attached to the asynchronous wheel side. In a sealing device provided with a pulsar ring that is detected in a non-contact manner by a magnetic sensor, the pulsar ring includes a support ring attached to a rotating wheel and a detection surface that generates magnetism, and the detection surface faces the magnetic sensor. as such, the multi-pole magnet rotor mounted on said support ring, constituted by the cover of a non-magnetic covering the detected surface of the multipolar magnetic rotor, the cover and core of a rigid, the object of this core It was constructed by the outer skin member of the soft covering both the detection surface and the magnetic sensor facing sides over the entire surface, the sealing device. 非回転輪である外輪に第１シールリングを固定し、回転輪である内輪に第２シールリンThe first seal ring is fixed to the outer ring which is a non-rotating ring, and the second seal ring is fixed to the inner ring which is a rotating ring. グを固定し、少なくとも一方のシールリングに備えるシールリップを他方のシールリングThe seal lip provided on at least one seal ring is fixed to the other seal ring. に対して接触させ、前記非同期輪側に取り付けられる磁気センサにより非接触で検出されIs detected in a non-contact manner by a magnetic sensor attached to the asynchronous wheel. るパルサリングを設けた転がり軸受装置において、前記パルサリングを、回転輪に取り付In a rolling bearing device provided with a pulsar ring, the pulsar ring is attached to a rotating wheel. けられる支持環と、磁気を発生する被検出面を備え且つこの被検出面が磁気センサと対向Provided with a support ring to be mounted and a detection surface for generating magnetism, and the detection surface is opposed to the magnetic sensor するように、前記支持環に取り付けられる多極磁石ロータと、多極磁石ロータの被検出面A multipolar magnet rotor attached to the support ring, and a detected surface of the multipolar magnet rotor を覆う非磁性のカバーとにより構成し、このカバーを、硬質の芯体と、この芯体の前記被A non-magnetic cover that covers the hard core body and the cover of the core body. 検出面および前記磁気センサと対向する側の全面の両方を被覆する軟質の外皮部材とによA soft skin member covering both the detection surface and the entire surface facing the magnetic sensor. り構成した、転がり軸受装置。This is a rolling bearing device.
JP2003196848A 2003-07-15 2003-07-15 Pulsar ring for detection of rotation, sealing device and rolling bearing device Expired - Fee Related JP4023405B2 (en)

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