JP2004076752A - Rolling bearing device - Google Patents

Rolling bearing device Download PDF

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Publication number
JP2004076752A
JP2004076752A JP2002233380A JP2002233380A JP2004076752A JP 2004076752 A JP2004076752 A JP 2004076752A JP 2002233380 A JP2002233380 A JP 2002233380A JP 2002233380 A JP2002233380 A JP 2002233380A JP 2004076752 A JP2004076752 A JP 2004076752A
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Japan
Prior art keywords
ring
cover
rolling bearing
bearing device
outer ring
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JP2002233380A
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JP4310975B2 (en
Inventor
Tomohiro Ishii
石井　知博
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Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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Priority to JP2002233380A priority Critical patent/JP4310975B2/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/723—Shaft end sealing means, e.g. cup-shaped caps or covers
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race 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
    • 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
    • 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)
  • Rolling Contact Bearings (AREA)
  • Sealing Of Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To increase accuracy and certainty of a rotation detector installed in a rolling bearing device for supporting a wheel for controlling an antilock brake system(ABS) in an automobile. <P>SOLUTION: This rolling bearing device has an outer race 31 being a fixed ring, an inner race 32 rotatably supported by this outer race 31 via a rolling body 33, a rotation detecting pulser ring 10 installed on the shaft directional one end side of this inner race 32 and a cover 15 for covering the shaft directional outside of this pulser ring 10. The cover 15 is installed in an outer diameter side part of the outer race 31 in a state of having a space 16 expanding outward in the radial direction between the part and a shaft directional end surface 36b of the outer race 31. The pulser ring 10 extends outward in the radial direction so as to face in the space 16 between the outer race 31 and the cover 15. An outside diametral dimension of the pulser ring 10 is set larger than a diameter of an inner peripheral surface of the outer race 31. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、転がり軸受装置に関する。
【０００２】
【従来の技術】
自動車などでは、アンチロックブレーキシステム（ＡＢＳ）等の制御にために、車輪支持用の転がり軸受装置に回転検出器を装備させることがある。
【０００３】
回転検出器は、パルサーリングと、センサとを含む構成である。パルサーリングは、転がり軸受装置の回転輪に取り付けられ、センサは固定輪の側に前記パルサーリングと対向する状態で設けられる。回転輪と同期回転するパルサーリングの回転速度がセンサにて検出され、車輪の回転速度や回転方向などの回転状態が検出される。
【０００４】
一般的に上記パルサーリングには、櫛歯形状の金属環もしくは円周数ヶ所に透孔を設けた金属環からなる磁性片タイプと、金属製の支持環に対して周方向交互に磁極を配置してなる環状磁石を取り付けた磁石タイプとがある。
【０００５】
回転検出器を備えた転がり軸受装置の従来例として、図７に、車輪支持用の転がり軸受装置を示す。図中、４１は転がり軸受装置の全体を示し、４２はハブ軸、４３は固定輪である外輪、４４は回転輪である内輪、４５は転動体としての玉である。
【０００６】
ハブ軸４２は、軸方向一端（図面では左端で、車体のアウター側）にフランジ４２ａを有し、このフランジ４２ａにはブレーキ用のディスクロータおよびホイール（いずれも図示せず）が取り付けられる。外輪４３は、軸方向他端（図面では右端で、車体のインナー側）にフランジ４３ａを有し、このフランジ４３ａは、車体の一部となるキャリア４６（ナックルの場合もある）に取り付けられる。
【０００７】
回転検出器４７は、パルサーリング４８と、センサ４９とからなり、パルサーリング４８は、回転輪である内輪４４の外周部に嵌着されている。符号５０は、パルサーリング４８を保護するために該パルサーリング４８の軸方向外側を覆うカバーで、外輪４３の内周面に圧入により取り付けられる。センサ４９は、カバー５０の外面に設けられており、このカバー５０を介してセンサ４９は前記パルサーリング４８と軸方向に対向する。
【０００８】
【発明が解決しようとする課題】
ところで、従来の回転検出器付きの転がり軸受装置においては、パルサーリング４８は、外輪４３と内輪４４との間の環状空間内に位置することになって、その外径寸法は、外輪４３の内周面により限定されている。すなわち、パルサーリング４８の外径寸法は、外輪４３の内周面の径より大きくできない構造となっている。パルサーリング４８の外径寸法が小さいと、当然、その検出径も小さくなり、径方向に沿った幅も充分に広くとれない。
【０００９】
磁石タイプのパルサーリングの場合、その検出径が小さいと、周方向に沿って設けられる磁極の数が少なくなり、それに応じて回転検出の精度が低くなる。また、パルサーリングの径方向に沿った幅が狭いと、各磁極の磁力が弱くなって検出漏れが生じやすくなり、回転検出が不確実となる。このような問題は、磁性片タイプのパルサーリングでも起こる。
【００１０】
したがって、本発明の主たる課題は、回転検出の精度と確実性とを増すことである。
【００１１】
【課題を解決するための手段】
上述した課題を達成するために、本発明は、固定輪である外輪と、この外輪に転動体を介して回転可能に支持される内輪と、この内輪の軸方向一端側に取り付けられる回転検出用のパルサーリングと、このパルサーリングの軸方向外方を覆うカバーとを備え、前記カバーは、前記外輪の軸方向端面との間に外輪の内周面より径方向外向きに広がる空間が存する状態で外輪の外径側の部分に取り付けられ、前記パルサーリングは、外輪とカバーとの間の前記空間内に臨むよう径方向外向きに延出している転がり軸受装置を構成した。
【００１２】
上記の構成によれば、パルサーリングは、外輪の内周面の制限を受けずに、その内周面より径方向外向きに延出され、パルサーリングの検出径が大径となる。したがって、パルサーリングの周方向に沿って設けられる磁極の数を多くすることができ、回転の検出精度が上がる。また、パルサーリングの径方向に沿った幅を広幅にできるので、各磁極の磁力が強力になり、各磁極について検出漏れが生じにくくなる。
【００１３】
なお、上記構成の転がり軸受装置は、パルサーリングに対応するセンサを含まないものであってもよいし、請求項２に記載のように、前記センサがパルサーリングと軸方向に対向する所要位置に取り付けられたものであってもよい。
【００１４】
上記構成の転がり軸受装置において、カバーは、外輪の軸方向端面との間に外輪の内周面より径方向外向きに広がる空間が存する状態で外輪に取り付けられていればよく、カバーの形状や外輪への取り付け方は特に限定されないが、例えば、カバーを、その外径側に外輪に向けて突出する取り付け用筒部を有する形状とし、この筒部の先端を、外輪の軸端に形成された円筒部の外周面に嵌着する等、外輪の軸端の外径側の部分に取り付けるようにすれば、カバーと外輪の軸方向端面との間に所要の空間が形成される。
【００１５】
この場合、カバーの筒部の先端を外輪の対応部分に嵌め込むだけで外輪に取り付けることができ、カバーの取り付けが容易である。
【００１６】
また、カバーは、その外径側に外輪に向けて筒状に突出する突出部と、この突出部の先端から径方向外向きにフランジ状に延出する取り付け用の縁部とを有し、この縁部が外輪の軸方向端面の外径側寄りの部分に取り付けられる構成とすることによっても、カバーと外輪の軸方向端面との間に所要の空間が形成される。この構成では、軸端にフランジがある外輪に対しても、カバーが支障なく取り付けられる。
【００１７】
【発明の実施の形態】
〔第１実施形態〕
図１から図３に本発明の第１実施形態を示している。ここでは、自動車の従動輪側に用いられる内輪回転型の転がり軸受装置を例に挙げる。図１は、第１実施形態に係る転がり軸受装置の全体の断面図、図２は、図１の装置の要部の拡大断面図、図３は、図１の装置を構成する部品であるパルサーリングの部分斜視図である。図例の転がり軸受装置１は、ハブ軸２と、複列転がり軸受３と、回転検出器４とを備えている。
【００１８】
ハブ軸２の一方軸端寄り（図１において左端寄りの位置で、車体のアウター側）には、径方向外向きに延びるフランジ２ａが設けられている。このハブ軸２において、前記のフランジ２ａよりも車両インナー側の領域に複列転がり軸受３が外装されている。
【００１９】
複列転がり軸受３は、ここでは複列外向きアンギュラ玉軸受であって、二列の軌道溝を有する単一の外輪３１と、ハブ軸２の小径部２ｂに外嵌されて一列の軌道を有する車体インナー側の一方の内輪３２と、二列で配設される複数の玉３３，…と、二つの冠形保持器３４，３４とを備えており、上記ハブ軸２の大径部２ｃで構成される軌道部が車体アウター側の他方の内輪となっている。外輪３１の外周には、径方向外向きに延びるフランジ３５が設けられており、このフランジ３５よりも車体インナー側には、軸方向外方に突出する円筒部３６がある。符号２ｄは、ハブ軸２の車体インナー側の端部に形成されたかしめ部で、一方の内輪３２をハブ軸２の小径部２ｂ上の所要位置に固定している。
【００２０】
そして、外輪３１のフランジ３５が、車体の一部となるキャリア５（またはナックル）に対してボルト６で非回転に取り付けられる。ハブ軸２のフランジ２ａの円周数ヶ所にはボルト７が貫通装着されている。このフランジ２ａの外側面（図１の左側で、車両アウター側の面）に、前記ボルト７が貫通する状態でディスクブレーキ装置のディスクロータ８および車輪９が添わされ、これらディスクロータ８および車輪９は、前記ボルト７に螺合されるナット（図示省略）で、フランジ２ａの外側面に固定される。
【００２１】
なお、本実施形態では、複列転がり軸受３の外輪３１の軸方向寸法が内輪部に対して短く設定され、外輪３１の車体インナー側にある円筒部３６の軸方向位置が一方の内輪３２と揃う程度に、外輪３１の円筒部３６およびフランジ３５は軸方向中央部寄りに退入している。
【００２２】
回転検出器４は、前記ハブ軸２の回転速度や回転方向などの回転状態を検出するものであり、パルサーリング１０と、センサ１１とを備えている。
【００２３】
パルサーリング１０は、内輪３２の外周面肩部に取り付けられる支持環１２と、この支持環１２に対して取り付けられる環状磁石１３とを有している。環状磁石１３は、図３に示すように、例えばフェライトの磁性粉末を混入したゴム材料を環状板形状にし、その円周等間隔の領域をＮ極とＳ極に交互に着磁した構成の着磁ゴムリングとされている。
【００２４】
パルサーリング１０の軸方向外方には、カバー１５が設けられている。このカバー１５は、パルサーリング１０を保護するとともに、複列転がり軸受３の車体インナー側を密封するためのもので、樹脂もしくは非磁性の金属であるステンレス鋼やアルミニウム等からなり、外径側に外輪３１に向けて軸方向に突出する取り付け用筒部１５ａを有する。
【００２５】
カバー１５の筒部１５ａの先端部分は、外輪３１の円筒部３６の外周面に嵌合されて、該円筒部３６の外周面に形成された段部３６ａまで圧入されている。このように、カバー１５の筒部１５ａの全部を外輪３１の円筒部３６の外周面に嵌め付けずに、筒部３６の先端部分のみを外輪３１の円筒部３６の外周面に嵌め付けることで、カバー１５と外輪３１の円筒部３６の軸方向端面３６ｂとの間には、外輪３１の内周面より径方向外向きに広がる空間１６が形成されており、この空間１６は、内輪３２と外輪３１との間に形成されている環状空間と連続している。
【００２６】
前記のパルサーリング１０の支持環１２は、内輪３２の外周面からカバー１５の側に軸方向に突出して、その突出した位置から径方向外向きに延出しており、支持環１２の径方向に立ち上がる部分とその一面に取り付けられた環状磁石１３とは、前記空間１６内に臨んでいる。したがって、パルサーリング１０の外径寸法は、外輪３１の内周面の径より大きくなっている。
【００２７】
センサ１１は、そのセンタを環状磁石１３の検出径と一致させた状態で、かつパルサーリング１０の環状磁石１３にカバー１５を介して軸方向で対向する状態でカバー１５の外面に設けられており、環状磁石１３の回転状態に対応した電気信号を出力する。このセンサ１１は、ホール素子や磁気抵抗素子等の磁束の流れ方向に応じて出力を変化させる検知部となる磁気検出素子と、当該磁気検出素子の出力波形を整える波形整形回路を組み込んだＩＣ等とで構成されたもので、いわゆるアクティブセンサと呼ばれるものである。このセンサ１１は、カバー１５に支持させてもよいし、カバー１５の外面に当てつけた状態で、他の固定側の部材、たとえばキャリア５やナックルに支持させてもよい。
【００２８】
上記の構成において、回転検出器４を構成するパルサーリング１０の外径寸法は、外輪３１の内周面の径よりも大径になっており、その検出径Ｒは、図２に明示するように、複列転がり軸受３の径寸法に対して充分大きい。したがって、パルサーリング１０の周方向に沿って設けられる磁極の数を多くすることができ、これにより、回転の検出精度を高めることができる。また、パルサーリング１０の径方向外方側に向けて、環状磁石１３の径方向に沿った幅Ｗを広げることができるので、各磁極の磁力が強力になり、各磁極について検出漏れが生じにくくなる。
【００２９】
なお、カバー１５の筒部１５ａを外輪３１の円筒部３６に取り付ける際、筒部１５ａの先端が円筒部３６の外周にある段部３６ａに受け止められることで、筒部１５ａと円筒部３６との嵌合深さが決まるから、カバー１５の筒部１５ａは、円筒部３６の段部３６ａに受け止められるまで圧入すればよく、正確な嵌め付けが容易にできる。
【００３０】
〔第２実施形態〕
図４は、本発明の第２実施形態に係る転がり軸受装置の要部の断面図である。本実施形態に係る転がり軸受装置は、図１および図２に示した第１実施形態の転がり軸受装置１と基本的に同構成のもので、第１実施形態の装置１と共通する部分には同一の符号を付している。
【００３１】
この第２実施形態においても、パルサーリング１０の軸方向外方には、パルサーリング１０を保護するとともに複列転がり軸受３の車体インナー側を密封するカバー１５が設けられる。このカバー１５は、その外径側に外輪３１に向けて突出する取り付け用筒部１５ａを有する。
【００３２】
本実施形態の転がり軸受装置が第１実施形態の装置１と異なるのは、カバー１５の筒部１５ａの外輪３１側への取り付け方である。すなわち、本実施形態の転がり軸受装置では、外輪３１の円筒部３６の軸方向端面３６ｂでその外径側の位置には、環状溝１７が形成されている。この環状溝１７は、カバー１５の筒部１５ａと同径で、筒部１５ａの一部が嵌入する程度の深さを有する。この環状溝１７に、前記カバー１５の筒部１５ａの先端部分が嵌入される。このように、カバー１５の筒部１５ａの先端部分を外輪３１の円筒部３６の軸方向端面３６ｂにある環状溝１７に嵌め込むことで、カバー１５と外輪３１の円筒部３６の軸方向端面３６ｂとの間には、外輪３１の内周面より径方向外向きに広がる空間１６が形成されている。
【００３３】
パルサーリング１０の支持環１２は、内輪３２の外周面に取り付けられており、内輪３２の外周面からカバー１５の側に軸方向に突出し、その突出した位置から径方向外向きに延出しており、支持環１２の径方向に立ち上がる部分とその一面に取り付けられた環状磁石１３とは、前記空間１６内に臨んでいる。したがって、パルサーリング１０の外径寸法は、外輪３１の内周面の径より大きくなっている。
【００３４】
パルサーリング１０とともに回転検出器４を構成するセンサ１１が、パルサーリング１０の環状磁石１３にカバー１５を介して軸方向で対向する状態でカバー１５の外面に設けられる点は、第１実施形態と同じである。
【００３５】
上記構成において、パルサーリング１０の外径寸法は、外輪３１の内周面の径よりも大径になっている。したがって、パルサーリング１０の周方向に沿って設けられる磁極の数を多くすることができる。また、環状磁石１３の径方向に沿った幅を広げて、各磁極の磁力を強力にすることができる。
【００３６】
なお、カバー１５の筒部１５ａを外輪３１側に取り付ける際、筒部１５ａの先端が外輪３１側の環状溝１７の底に受け止められることで、環状溝１７に対する筒部１５ａの嵌入深さが決まるから、カバー１５の筒部１５ａは、環状溝１７の底に受け止められるまで差し込めばよく、正確な嵌め付けが容易にできる。
【００３７】
図示の転がり軸受装置では、外輪３１の車体インナー側の端部にある円筒部３６の端面３６ｂに環状溝１７を形成したが、環状溝１７は必ずしも外輪３１の円筒部３６の端面３６ｂに形成する必要はない。たとえば、外輪３１の車体インナー側の軸端にフランジが形成されていて、外輪３１の車体インナー側の端面が、フランジの取り付け面と面一に連続する面となっている場合は、この端面で、外輪３１の内周面よりも外径側の位置に、カバー１５の筒部１５ａに対応する環状溝１７を形成すればよい。
【００３８】
〔第３実施形態〕
図５は、本発明の第３実施形態に係る転がり軸受装置の要部の断面図である。本実施形態に係る転がり軸受装置は、図１および図２に示した第１実施形態の転がり軸受装置と基本的に同構成のもので、第１実施形態の装置と共通する部分には同一の符号を付している。
【００３９】
この第３実施形態においても、パルサーリング１０の軸方向外方には、パルサーリング１０を保護するとともに複列転がり軸受３の車体インナー側を密封するカバー１５が設けられる。この実施形態の転がり軸受が、第１実施形態の装置１と異なるのは、カバー１５の形状と、カバー１５の外輪３１側への取り付け方である。
【００４０】
すなわち、本実施形態の転がり軸受装置におけるカバー１５は、その外径側に外輪３１に向けて軸方向に筒状に突出する突出部１５ｂを有するとともに、その突出部１５ｂの突出端から径方向外向きにフランジ状に延出する取り付け用縁部１５ｃを有する。
【００４１】
一方、外輪３１の車体インナー側の軸端には、車体の一部となるキャリア５（またはナックル）に対してボルト６で非回転に取り付けられるフランジ３５が形成されていて、外輪３１の車体インナー側の端面が、フランジ３５の取り付け面３５ａと面一に連続する面となっている。
【００４２】
カバー１５の取り付け用縁部１５ｃには、外輪３１のフランジ３５のボルト孔１８に一致する貫通孔１９が形成されており、この取り付け用縁部１５ｃは、外輪３１の内周面より外径側の位置で、外輪３１の車体インナー側の端面３５ａに当て付けられる。そして、この取り付け用縁部１５ｃが外輪３１のフランジ３５とキャリア５との間に挟み込まれるよう、外輪３１のフランジ３５とカバー１５の取り付け用縁部１５ｃとをキャリア５にあてがわれ、フランジ３５のボルト孔１８と取り付け用縁部１５ｃの貫通孔１９とを貫通するボルト６により、キャリア５に取り付けられる。これで、カバー１５の突出部１５ｂの内径側では、カバー１５と外輪３１の軸方向端面（フランジ３５の取り付け面３５ａでもある）との間に、外輪３１の内周面より径方向外向きに広がる空間１６が形成される。
【００４３】
パルサーリング１０の支持環１２は、内輪３２の外周面に取り付けられており、内輪３２の外周面からカバー１５の側に軸方向に突出し、その突出した位置から径方向外向きに延出しており、支持環１２の径方向に立ち上がる部分とその一面に取り付けられた環状磁石１３とは、前記空間１６内に臨んでいる。したがって、パルサーリング１０の外径寸法は、外輪３１の内周面の径より大きくなっている。
【００４４】
センサ１１が、パルサーリング１０の環状磁石１３にカバー１５を介して軸方向で対向する状態でカバー１５の外面に設けられる点は、第１実施形態と同じである。
【００４５】
上記構成において、パルサーリング１０の外径寸法は、外輪３１の内周面の径よりも大径になっているため、パルサーリング１０の周方向に沿って設けられる磁極の数を多くすることができる。また、環状磁石１３の径方向に沿った幅を広げて、各磁極の磁力を強力にすることができる。
【００４６】
〔その他の実施形態〕
外輪３１の軸方向端面とカバー１５との間に、外輪３１の内周面より径方向外向きに広がる空間１６を形成するには、図６に示すように、外輪３１の円筒部３６の端面３６ｂのうち、その内径部分を切削する等して、カバー１５に対して軸方向中央部寄りに退入させてもよい。上記の構成により、外輪３１の円筒部３６の内径側端面３６ｃとカバー１５との間に、所要の空間１６が形成される。パルサーリング１０の径方向への立ち上がり部分は、この空間１６内に臨ませればよい。この構造では、カバー１５の外径側に形成されている取り付け用筒部１５ａは、その全長さ分が外輪３１の円筒部３６の外周面に嵌着される。
【００４７】
上記各実施形態では、従動輪用で内輪回転型の転がり軸受装置を例示したが、本発明は、駆動輪用の転がり軸受装置にも実施可能である。駆動輪用の転がり軸受装置は、従動輪用の転がり軸受装置とハブ軸の構造が異なる等、種々の違いはあるが、パルサーリング１０やカバー１５、センサ１１等を設ける部分の構成は、各実施形態において図示した構成が駆動輪用の転がり軸受装置にも適用できるので、駆動輪用の転がり軸受装置についての実施形態は、特に図示しない。
【００４８】
このほか、上記の各実施形態では、パルサーリング１０として磁石タイプのものを示したが、櫛歯形状の金属環もしくは円周数ヶ所に透孔を設けた金属環からなる磁性片タイプのものでもよい。また、パルサーリング１０の軸方向外方を覆うカバー１５は、磁性を有する金属で構成することも可能である。
【００４９】
【発明の効果】
以上説明したように、本発明によれば、パルサーリングの外径寸法を拡大して、周方向に配列する磁極等の数を多くして、回転検出の精度を高めることができる。また、環状磁石等の径方向に沿った幅を広げて、各磁極の磁力を強力にするなどして、検出漏れを生じにくくして、回転検出の確実さを増すことができる。
【図面の簡単な説明】
【図１】本発明の第１実施形態に係る転がり軸受装置の全体の断面図。
【図２】図１の装置の要部の拡大断面図。
【図３】図１の装置を構成する部品であるパルサーリングの部分斜視図。
【図４】本発明の第２実施形態に係る転がり軸受装置の要部の断面図。
【図５】本発明の第３実施形態に係る転がり軸受装置の要部の断面図。
【図６】本発明のその他の実施形態に係る転がり軸受装置の要部の断面図。
【図７】従来の転がり軸受装置の半部の断面図。
【符号の説明】
１　　　転がり軸受装置（全体）
２　　　ハブ軸
３　　　複列転がり軸受
３１　　外輪
３２　　内輪
３３　　玉
３６ｂ　外輪の円筒部の端面
３５ａ　外輪のフランジ側の端面（取り付け面）
１０　　　パルサーリング
１１　　　センサ
１５　　　カバー
１５ａ　　取り付け用筒部
１５ｃ　　取り付け用縁部
１６　　　空間[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rolling bearing device.
[0002]
[Prior art]
2. Description of the Related Art In an automobile or the like, a rolling detector device for supporting a wheel may be equipped with a rotation detector in order to control an anti-lock brake system (ABS) or the like.
[0003]
The rotation detector has a configuration including a pulsar ring and a sensor. The pulsar ring is mounted on the rotating wheel of the rolling bearing device, and the sensor is provided on the fixed wheel side so as to face the pulsar ring. The rotation speed of the pulsar ring that rotates synchronously with the rotating wheel is detected by a sensor, and the rotation state such as the rotation speed and the rotation direction of the wheel is detected.
[0004]
Generally, in the pulsar ring, a magnetic piece type composed of a comb-shaped metal ring or a metal ring provided with through holes at several places around the circumference, and magnetic poles are alternately arranged in a circumferential direction with respect to a metal support ring. There is a magnet type in which a ring magnet is attached.
[0005]
As a conventional example of a rolling bearing device provided with a rotation detector, FIG. 7 shows a rolling bearing device for supporting wheels. In the drawing, reference numeral 41 denotes the whole rolling bearing device, reference numeral 42 denotes a hub shaft, reference numeral 43 denotes an outer ring which is a fixed wheel, reference numeral 44 denotes an inner ring which is a rotating wheel, and reference numeral 45 denotes a ball as a rolling element.
[0006]
The hub axle 42 has a flange 42a at one axial end (the left end in the drawing, the outer side of the vehicle body), and a disk rotor and a wheel (neither is shown) for braking are attached to the flange 42a. The outer ring 43 has a flange 43a at the other end in the axial direction (the right end in the drawing, the inner side of the vehicle body), and the flange 43a is attached to a carrier 46 (which may be a knuckle) that is a part of the vehicle body.
[0007]
The rotation detector 47 includes a pulsar ring 48 and a sensor 49, and the pulsar ring 48 is fitted on an outer peripheral portion of the inner ring 44 which is a rotating wheel. Reference numeral 50 denotes a cover for covering the pulsar ring 48 in the axial direction to protect the pulsar ring 48, and is attached to the inner peripheral surface of the outer ring 43 by press fitting. The sensor 49 is provided on the outer surface of the cover 50, and the sensor 49 faces the pulsar ring 48 in the axial direction via the cover 50.
[0008]
[Problems to be solved by the invention]
By the way, in the conventional rolling bearing device with a rotation detector, the pulsar ring 48 is located in the annular space between the outer ring 43 and the inner ring 44, and the outer diameter of the pulsar ring 48 is smaller than that of the outer ring 43. It is limited by the peripheral surface. That is, the outer diameter of the pulsar ring 48 cannot be larger than the diameter of the inner peripheral surface of the outer ring 43. If the outer diameter of the pulsar ring 48 is small, the detected diameter is naturally small, and the width along the radial direction cannot be sufficiently widened.
[0009]
In the case of a magnet type pulsar ring, if the detection diameter is small, the number of magnetic poles provided along the circumferential direction decreases, and the accuracy of rotation detection decreases accordingly. Also, if the width of the pulsar ring along the radial direction is narrow, the magnetic force of each magnetic pole is weakened, and detection leakage is likely to occur, making rotation detection uncertain. Such a problem also occurs in a magnetic piece type pulser ring.
[0010]
Therefore, a main object of the present invention is to increase the accuracy and certainty of rotation detection.
[0011]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an outer ring that is a fixed wheel, an inner ring rotatably supported on the outer ring via a rolling element, and a rotation detection attached to one axial end of the inner ring. A pulsar ring, and a cover that covers the pulsar ring axially outward, wherein the cover has a space extending radially outward from the inner peripheral surface of the outer race between the cover and the axial end surface of the outer race. The pulsar ring is attached to the outer diameter side portion of the outer race, and the pulsar ring constitutes a rolling bearing device extending radially outward so as to reach the space between the outer race and the cover.
[0012]
According to the above configuration, the pulsar ring extends radially outward from the inner peripheral surface without being restricted by the inner peripheral surface of the outer ring, and the detected diameter of the pulsar ring becomes larger. Therefore, the number of magnetic poles provided along the circumferential direction of the pulsar ring can be increased, and the rotation detection accuracy is improved. In addition, since the width of the pulsar ring in the radial direction can be increased, the magnetic force of each magnetic pole becomes strong, and detection leakage of each magnetic pole hardly occurs.
[0013]
In addition, the rolling bearing device having the above configuration may not include a sensor corresponding to the pulsar ring, or as described in claim 2, the sensor is located at a required position facing the pulsar ring in the axial direction. It may be attached.
[0014]
In the rolling bearing device having the above configuration, the cover may be attached to the outer ring in a state where there is a space extending radially outward from the inner peripheral surface of the outer ring between the cover and the axial end surface of the outer ring. How to attach to the outer ring is not particularly limited, for example, the cover has a shape having a mounting cylindrical portion protruding toward the outer ring on the outer diameter side, and the tip of this cylindrical portion is formed at the shaft end of the outer ring. If the outer ring is attached to the outer diameter side of the axial end of the outer ring, for example, by fitting to the outer peripheral surface of the cylindrical portion, a required space is formed between the cover and the axial end surface of the outer ring.
[0015]
In this case, the cover can be attached to the outer ring simply by fitting the tip of the cylindrical portion of the cover into the corresponding portion of the outer ring, and the cover can be easily attached.
[0016]
Further, the cover has a protruding portion protruding in a cylindrical shape toward the outer ring on an outer diameter side thereof, and a mounting edge portion extending in a flange shape radially outward from a tip of the protruding portion, The required space is also formed between the cover and the axial end surface of the outer ring by employing a configuration in which the edge is attached to a portion closer to the outer diameter side of the axial end surface of the outer ring. In this configuration, the cover can be attached to the outer ring having the flange at the shaft end without any trouble.
[0017]
BEST MODE FOR CARRYING OUT THE INVENTION
[First Embodiment]
1 to 3 show a first embodiment of the present invention. Here, an inner ring rotating type rolling bearing device used on a driven wheel side of an automobile will be described as an example. 1 is an overall sectional view of a rolling bearing device according to a first embodiment, FIG. 2 is an enlarged sectional view of a main part of the device of FIG. 1, and FIG. 3 is a pulsar which is a part of the device of FIG. It is a partial perspective view of a ring. The illustrated rolling bearing device 1 includes a hub shaft 2, a double-row rolling bearing 3, and a rotation detector 4.
[0018]
A flange 2a extending radially outward is provided near one axial end of the hub shaft 2 (a position near the left end in FIG. 1, on the outer side of the vehicle body). In the hub shaft 2, a double-row rolling bearing 3 is externally provided in a region closer to the vehicle inner side than the flange 2a.
[0019]
The double-row rolling bearing 3 is, here, a double-row outward-facing angular contact ball bearing, and has a single outer ring 31 having two rows of raceway grooves and a single-row raceway fitted to the small-diameter portion 2b of the hub shaft 2. , And a plurality of balls 33,... Arranged in two rows, and two crowned retainers 34, 34. The large-diameter portion 2 c of the hub axle 2 Is the other inner ring on the vehicle body outer side. A flange 35 extending radially outward is provided on the outer periphery of the outer ring 31, and a cylindrical portion 36 protruding axially outward is provided on the vehicle body inner side with respect to the flange 35. Reference numeral 2d denotes a caulking portion formed at the end of the hub axle 2 on the vehicle body inner side, and fixes one inner ring 32 at a required position on the small diameter portion 2b of the hub axle 2.
[0020]
Then, the flange 35 of the outer race 31 is non-rotatably attached to the carrier 5 (or knuckle), which is a part of the vehicle body, with the bolt 6. Bolts 7 are mounted through several places on the circumference of the flange 2a of the hub shaft 2. A disk rotor 8 and a wheel 9 of a disk brake device are attached to an outer surface of the flange 2a (a surface on the vehicle outer side on the left side in FIG. 1) with the bolt 7 penetrating therethrough. Is a nut (not shown) screwed to the bolt 7, and is fixed to the outer surface of the flange 2a.
[0021]
In the present embodiment, the axial dimension of the outer race 31 of the double row rolling bearing 3 is set shorter than the inner race part, and the axial position of the cylindrical part 36 of the outer race 31 on the inner side of the vehicle body is equal to that of the one inner race 32. The cylindrical portion 36 and the flange 35 of the outer race 31 are retracted toward the center in the axial direction to the extent that they are aligned.
[0022]
The rotation detector 4 detects a rotation state such as a rotation speed and a rotation direction of the hub shaft 2, and includes a pulsar ring 10 and a sensor 11.
[0023]
The pulsar ring 10 has a support ring 12 attached to the shoulder of the outer peripheral surface of the inner ring 32, and an annular magnet 13 attached to the support ring 12. As shown in FIG. 3, the annular magnet 13 is formed of a rubber material mixed with, for example, ferrite magnetic powder, in the shape of an annular plate, and its circumferentially equally spaced regions are alternately magnetized to N poles and S poles. It is a magnetic rubber ring.
[0024]
A cover 15 is provided outside the pulsar ring 10 in the axial direction. The cover 15 protects the pulsar ring 10 and seals the inner side of the double-row rolling bearing 3 on the vehicle body. The cover 15 is made of resin or a non-magnetic metal such as stainless steel or aluminum. It has a mounting tubular portion 15a that protrudes in the axial direction toward the outer ring 31.
[0025]
The distal end portion of the cylindrical portion 15 a of the cover 15 is fitted to the outer peripheral surface of the cylindrical portion 36 of the outer race 31 and is press-fitted to a step portion 36 a formed on the outer peripheral surface of the cylindrical portion 36. As described above, the entire cylindrical portion 15 a of the cover 15 is not fitted to the outer peripheral surface of the cylindrical portion 36 of the outer ring 31, but only the distal end portion of the cylindrical portion 36 is fitted to the outer peripheral surface of the cylindrical portion 36 of the outer ring 31. A space 16 is formed between the cover 15 and the axial end surface 36b of the cylindrical portion 36 of the outer ring 31. The space 16 extends radially outward from the inner peripheral surface of the outer ring 31. It is continuous with the annular space formed between the outer ring 31 and the outer ring 31.
[0026]
The support ring 12 of the pulsar ring 10 protrudes axially from the outer peripheral surface of the inner race 32 toward the cover 15 and extends radially outward from the protruded position. The rising portion and the annular magnet 13 attached to one surface face the space 16. Therefore, the outer diameter of the pulsar ring 10 is larger than the diameter of the inner peripheral surface of the outer ring 31.
[0027]
The sensor 11 is provided on the outer surface of the cover 15 in a state where the center thereof is matched with the detection diameter of the annular magnet 13 and is opposed to the annular magnet 13 of the pulsar ring 10 via the cover 15 in the axial direction. And outputs an electric signal corresponding to the rotation state of the annular magnet 13. The sensor 11 includes a magnetic detection element such as a Hall element and a magnetic resistance element serving as a detection unit that changes the output in accordance with the flow direction of magnetic flux, an IC incorporating a waveform shaping circuit that adjusts an output waveform of the magnetic detection element, and the like. This is a so-called active sensor. The sensor 11 may be supported by the cover 15 or may be supported by another fixed-side member, for example, the carrier 5 or a knuckle, in a state where the sensor 11 is applied to the outer surface of the cover 15.
[0028]
In the above configuration, the outer diameter of the pulsar ring 10 constituting the rotation detector 4 is larger than the diameter of the inner peripheral surface of the outer ring 31, and the detected diameter R is as shown in FIG. In addition, it is sufficiently large with respect to the diameter of the double row rolling bearing 3. Therefore, the number of magnetic poles provided along the circumferential direction of the pulsar ring 10 can be increased, thereby improving the rotation detection accuracy. In addition, since the width W along the radial direction of the annular magnet 13 can be increased toward the radially outward side of the pulsar ring 10, the magnetic force of each magnetic pole becomes strong, and detection leakage hardly occurs for each magnetic pole. Become.
[0029]
When the cylindrical portion 15a of the cover 15 is attached to the cylindrical portion 36 of the outer race 31, the distal end of the cylindrical portion 15a is received by the step portion 36a on the outer periphery of the cylindrical portion 36, so that the cylindrical portion 15a and the cylindrical portion 36 Since the fitting depth is determined, the cylindrical portion 15a of the cover 15 may be press-fitted until it is received by the step portion 36a of the cylindrical portion 36, and accurate fitting can be easily performed.
[0030]
[Second embodiment]
FIG. 4 is a sectional view of a main part of a rolling bearing device according to a second embodiment of the present invention. The rolling bearing device according to the present embodiment has basically the same configuration as the rolling bearing device 1 according to the first embodiment shown in FIGS. 1 and 2, and the portions common to the device 1 according to the first embodiment include The same reference numerals are given.
[0031]
Also in the second embodiment, a cover 15 that protects the pulsar ring 10 and seals the inner side of the double row rolling bearing 3 on the vehicle body is provided outside the pulsar ring 10 in the axial direction. The cover 15 has a mounting tubular portion 15a protruding toward the outer ring 31 on the outer diameter side.
[0032]
The difference between the rolling bearing device of the present embodiment and the device 1 of the first embodiment is in the method of attaching the cylindrical portion 15a of the cover 15 to the outer ring 31 side. That is, in the rolling bearing device of the present embodiment, the annular groove 17 is formed on the axial end face 36 b of the cylindrical portion 36 of the outer race 31 on the outer diameter side thereof. The annular groove 17 has the same diameter as the cylindrical portion 15a of the cover 15, and has a depth such that a part of the cylindrical portion 15a is fitted. The distal end of the cylindrical portion 15a of the cover 15 is fitted into the annular groove 17. In this manner, by fitting the distal end portion of the cylindrical portion 15a of the cover 15 into the annular groove 17 in the axial end surface 36b of the cylindrical portion 36 of the outer ring 31, the axial end surface 36b of the cylindrical portion 36 of the cover 15 and the outer ring 31 is fitted. A space 16 that extends radially outward from the inner peripheral surface of the outer ring 31 is formed between the outer ring 31 and the outer ring 31.
[0033]
The support ring 12 of the pulsar ring 10 is attached to the outer peripheral surface of the inner ring 32, projects axially from the outer peripheral surface of the inner ring 32 toward the cover 15, and extends radially outward from the projected position. The portion of the support ring 12 that rises in the radial direction and the annular magnet 13 attached to one surface of the support ring 12 face the space 16. Therefore, the outer diameter of the pulsar ring 10 is larger than the diameter of the inner peripheral surface of the outer ring 31.
[0034]
The point that the sensor 11 constituting the rotation detector 4 together with the pulsar ring 10 is provided on the outer surface of the cover 15 in a state where the sensor 11 faces the annular magnet 13 of the pulsar ring 10 via the cover 15 in the axial direction is different from the first embodiment. Is the same.
[0035]
In the above configuration, the outer diameter of the pulsar ring 10 is larger than the diameter of the inner peripheral surface of the outer ring 31. Therefore, the number of magnetic poles provided along the circumferential direction of the pulsar ring 10 can be increased. In addition, the width of the annular magnet 13 along the radial direction can be increased to increase the magnetic force of each magnetic pole.
[0036]
When the tubular portion 15a of the cover 15 is attached to the outer ring 31, the tip of the tubular portion 15a is received by the bottom of the annular groove 17 on the outer ring 31, so that the fitting depth of the tubular portion 15a into the annular groove 17 is determined. Therefore, the cylindrical portion 15a of the cover 15 may be inserted until it is received by the bottom of the annular groove 17, and accurate fitting can be easily performed.
[0037]
In the illustrated rolling bearing device, the annular groove 17 is formed on the end surface 36b of the cylindrical portion 36 at the end of the outer ring 31 on the vehicle body inner side. No need. For example, when a flange is formed at the shaft end of the outer ring 31 on the vehicle body inner side, and the end surface of the outer ring 31 on the vehicle body inner side is a surface that is flush with the mounting surface of the flange, this end surface is used. The annular groove 17 corresponding to the cylindrical portion 15a of the cover 15 may be formed at a position on the outer diameter side of the inner peripheral surface of the outer ring 31.
[0038]
[Third embodiment]
FIG. 5 is a sectional view of a main part of a rolling bearing device according to a third embodiment of the present invention. The rolling bearing device according to the present embodiment has basically the same configuration as the rolling bearing device of the first embodiment shown in FIGS. 1 and 2, and the same parts as those of the device of the first embodiment have the same configuration. Signs are attached.
[0039]
Also in the third embodiment, a cover 15 that protects the pulsar ring 10 and seals the inner side of the double-row rolling bearing 3 on the vehicle body is provided outside the pulsar ring 10 in the axial direction. The rolling bearing of this embodiment differs from the device 1 of the first embodiment in the shape of the cover 15 and how the cover 15 is attached to the outer ring 31.
[0040]
That is, the cover 15 in the rolling bearing device of the present embodiment has a protruding portion 15b that protrudes in the axial direction toward the outer ring 31 on the outer diameter side, and is radially outward from the protruding end of the protruding portion 15b. It has a mounting edge 15c extending in a flange-like direction.
[0041]
On the other hand, a flange 35 that is non-rotatably attached to a carrier 5 (or a knuckle) that is a part of the vehicle body by a bolt 6 is formed at a shaft end on the vehicle body inner side of the outer ring 31. The side end surface is a surface that is flush with the mounting surface 35 a of the flange 35.
[0042]
The mounting edge 15c of the cover 15 is formed with a through hole 19 that matches the bolt hole 18 of the flange 35 of the outer ring 31. The mounting edge 15c is located on the outer diameter side of the inner peripheral surface of the outer ring 31. Is applied to the end surface 35a of the outer ring 31 on the inner side of the vehicle body. Then, the flange 35 of the outer race 31 and the mounting edge 15c of the cover 15 are applied to the carrier 5 so that the mounting edge 15c is sandwiched between the flange 35 of the outer race 31 and the carrier 5, and the flange 35 Is attached to the carrier 5 by bolts 6 penetrating through the bolt holes 18 of the mounting edge 15c and the through holes 19 of the mounting edge 15c. Thus, on the inner diameter side of the protruding portion 15b of the cover 15, between the cover 15 and the axial end surface of the outer ring 31 (which is also the mounting surface 35a of the flange 35), radially outward from the inner peripheral surface of the outer ring 31. An expanding space 16 is formed.
[0043]
The support ring 12 of the pulsar ring 10 is attached to the outer peripheral surface of the inner ring 32, projects axially from the outer peripheral surface of the inner ring 32 toward the cover 15, and extends radially outward from the projected position. The portion of the support ring 12 that rises in the radial direction and the annular magnet 13 attached to one surface of the support ring 12 face the space 16. Therefore, the outer diameter of the pulsar ring 10 is larger than the diameter of the inner peripheral surface of the outer ring 31.
[0044]
The point that the sensor 11 is provided on the outer surface of the cover 15 so as to face the annular magnet 13 of the pulsar ring 10 via the cover 15 in the axial direction is the same as in the first embodiment.
[0045]
In the above configuration, since the outer diameter of the pulsar ring 10 is larger than the diameter of the inner peripheral surface of the outer ring 31, the number of magnetic poles provided along the circumferential direction of the pulsar ring 10 may be increased. it can. In addition, the width of the annular magnet 13 along the radial direction can be increased to increase the magnetic force of each magnetic pole.
[0046]
[Other embodiments]
In order to form a space 16 extending radially outward from the inner peripheral surface of the outer race 31 between the axial end surface of the outer race 31 and the cover 15, as shown in FIG. Of the 36b, the inner diameter portion may be cut or the like, and may be retracted toward the center in the axial direction with respect to the cover 15. With the above-described configuration, a required space 16 is formed between the inner diameter side end surface 36 c of the cylindrical portion 36 of the outer ring 31 and the cover 15. The rising portion of the pulsar ring 10 in the radial direction may be exposed in the space 16. In this structure, the mounting tubular portion 15a formed on the outer diameter side of the cover 15 is fitted on the outer peripheral surface of the cylindrical portion 36 of the outer race 31 by the entire length.
[0047]
In each of the above embodiments, the inner ring rotating type rolling bearing device for the driven wheel has been exemplified. However, the present invention is also applicable to a rolling bearing device for a driving wheel. The rolling bearing device for the drive wheel has various differences such as a different structure of the hub axle from the rolling bearing device for the driven wheel, but the configuration of the portion where the pulsar ring 10, the cover 15, the sensor 11, and the like are provided is as follows. Since the configuration shown in the embodiment can be applied to the rolling bearing device for the driving wheel, the embodiment of the rolling bearing device for the driving wheel is not particularly shown.
[0048]
In addition, in each of the above embodiments, the magnet type is shown as the pulsar ring 10, but a magnetic piece type made of a comb-shaped metal ring or a metal ring provided with through holes at several places around the circumference may be used. Good. Further, the cover 15 that covers the outside of the pulsar ring 10 in the axial direction can be made of a metal having magnetism.
[0049]
【The invention's effect】
As described above, according to the present invention, it is possible to increase the outer diameter of the pulsar ring, increase the number of magnetic poles and the like arranged in the circumferential direction, and improve the accuracy of rotation detection. In addition, by increasing the width of the annular magnet or the like in the radial direction to increase the magnetic force of each magnetic pole, it is possible to reduce detection leakage and increase the reliability of rotation detection.
[Brief description of the drawings]
FIG. 1 is an overall sectional view of a rolling bearing device according to a first embodiment of the present invention.
FIG. 2 is an enlarged sectional view of a main part of the apparatus of FIG.
FIG. 3 is a partial perspective view of a pulsar ring which is a component constituting the apparatus of FIG. 1;
FIG. 4 is a sectional view of a main part of a rolling bearing device according to a second embodiment of the present invention.
FIG. 5 is a sectional view of a main part of a rolling bearing device according to a third embodiment of the present invention.
FIG. 6 is a sectional view of a main part of a rolling bearing device according to another embodiment of the present invention.
FIG. 7 is a sectional view of a half part of a conventional rolling bearing device.
[Explanation of symbols]
1 Rolling bearing device (whole)
2 Hub shaft 3 Double row rolling bearing 31 Outer ring 32 Inner ring 33 Ball 36b End face 35a of cylindrical part of outer ring Flange end face of outer ring (mounting face)
Reference Signs List 10 Pulsar ring 11 Sensor 15 Cover 15a Mounting cylinder 15c Mounting edge 16 Space

Claims (4)

固定輪である外輪と、この外輪に転動体を介して回転可能に支持される内輪と、この内輪の軸方向一端側に取り付けられる回転検出用のパルサーリングと、このパルサーリングの軸方向外方を覆うカバーとを備え、
前記カバーは、前記外輪の軸方向端面との間に外輪の内周面よりも径方向外向きに広がる空間が存する状態で外輪の外径側の部分に取り付けられ、
前記パルサーリングは、外輪とカバーとの間の前記空間内に臨むよう径方向外向きに延出している転がり軸受装置。An outer ring that is a fixed ring, an inner ring rotatably supported by the outer ring via a rolling element, a pulsar ring for rotation detection attached to one axial end of the inner ring, and an axially outer portion of the pulsar ring. And a cover that covers the
The cover is attached to an outer diameter side portion of the outer ring in a state in which a space extending radially outward from the inner peripheral surface of the outer ring exists between the cover and the axial end surface of the outer ring,
The rolling bearing device, wherein the pulsar ring extends radially outward so as to face the space between the outer race and the cover. 請求項１の記載の転がり軸受装置において、
前記カバーの外面で、このカバーを介して前記パルサーリングと軸方向に対向しうる位置にセンサが設けられている転がり軸受装置。The rolling bearing device according to claim 1,
A rolling bearing device, wherein a sensor is provided on an outer surface of the cover at a position where the sensor can face the pulsar ring via the cover in the axial direction. 請求項１または請求項２の記載の転がり軸受装置において、
前記カバーは、その外径側に外輪に向けて突出する取り付け用筒部を有し、この筒部の先端が、外輪の軸端の外径側の部分に取り付けられている転がり軸受装置。The rolling bearing device according to claim 1 or 2,
A rolling bearing device in which the cover has a mounting cylindrical portion protruding toward the outer ring on an outer diameter side thereof, and a tip of the cylindrical portion is mounted on an outer diameter portion of a shaft end of the outer ring. 請求項１または請求項２の記載の転がり軸受装置において、
前記カバーは、その外径側に外輪に向けて筒状に突出する突出部と、この突出部の先端から径方向外向きにフランジ状に延出する取り付け用の縁部とを有し、この縁部が外輪の軸方向端面の外径側寄りの部分に取り付けられている転がり軸受装置。The rolling bearing device according to claim 1 or 2,
The cover has, on its outer diameter side, a protrusion protruding in a cylindrical shape toward the outer ring, and a mounting edge extending radially outward from an end of the protrusion in a flange shape, and A rolling bearing device in which an edge is attached to a portion of an outer race near an outer diameter side of an axial end surface.
JP2002233380A 2002-08-09 2002-08-09 Rolling bearing device Expired - Fee Related JP4310975B2 (en)

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006284402A (en) * 2005-04-01 2006-10-19 Ntn Corp Bearing device for wheel with rotation speed detection device
JP2006329663A (en) * 2005-05-23 2006-12-07 Ntn Corp Bearing unit for wheel with rotational speed detector
WO2010050201A1 (en) * 2008-10-29 2010-05-06 Ntn株式会社 Wheel bearing device with rotational speed detector
JP2010106909A (en) * 2008-10-29 2010-05-13 Ntn Corp Wheel bearing device with rotating speed detector
CN102822547A (en) * 2010-03-18 2012-12-12 Ntn株式会社 Wheel bearing device equipped with rotational speed detector
JP2015218855A (en) * 2014-05-20 2015-12-07 日本精工株式会社 Bearing unit with rotation speed detector
DE102011009014B4 (en) 2010-01-25 2020-04-23 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Wheel assembly with a bearing cap that has a seal
EP3714178A4 (en) * 2018-06-20 2020-12-30 Tirsan Kardan Sanayi Ve Ticaret Anonim Sirketi A system for determining revolutions in drive shafts, a cardan shaft related to said system and determining method thereof

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006284402A (en) * 2005-04-01 2006-10-19 Ntn Corp Bearing device for wheel with rotation speed detection device
JP2006329663A (en) * 2005-05-23 2006-12-07 Ntn Corp Bearing unit for wheel with rotational speed detector
JP4748775B2 (en) * 2005-05-23 2011-08-17 Ｎｔｎ株式会社 Wheel bearing device with rotation speed detector
WO2010050201A1 (en) * 2008-10-29 2010-05-06 Ntn株式会社 Wheel bearing device with rotational speed detector
JP2010106909A (en) * 2008-10-29 2010-05-13 Ntn Corp Wheel bearing device with rotating speed detector
US8382377B2 (en) 2008-10-29 2013-02-26 Ntn Corporation Wheel bearing apparatus incorporated with a wheel speed detecting apparatus
DE102011009014B4 (en) 2010-01-25 2020-04-23 GM Global Technology Operations LLC (n. d. Gesetzen des Staates Delaware) Wheel assembly with a bearing cap that has a seal
CN102822547A (en) * 2010-03-18 2012-12-12 Ntn株式会社 Wheel bearing device equipped with rotational speed detector
JP2015218855A (en) * 2014-05-20 2015-12-07 日本精工株式会社 Bearing unit with rotation speed detector
EP3714178A4 (en) * 2018-06-20 2020-12-30 Tirsan Kardan Sanayi Ve Ticaret Anonim Sirketi A system for determining revolutions in drive shafts, a cardan shaft related to said system and determining method thereof

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