JP2004204892A - Rolling bearing device - Google Patents

Rolling bearing device Download PDF

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Publication number
JP2004204892A
JP2004204892A JP2002372497A JP2002372497A JP2004204892A JP 2004204892 A JP2004204892 A JP 2004204892A JP 2002372497 A JP2002372497 A JP 2002372497A JP 2002372497 A JP2002372497 A JP 2002372497A JP 2004204892 A JP2004204892 A JP 2004204892A
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Japan
Prior art keywords
annular
ring
cylindrical portion
rolling bearing
peripheral surface
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
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JP2002372497A
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Japanese (ja)
Inventor
Junji Murata
順司 村田
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Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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Publication date
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Priority to JP2002372497A priority Critical patent/JP2004204892A/en
Publication of JP2004204892A publication Critical patent/JP2004204892A/en
Pending legal-status Critical Current

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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
    • 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)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing device for an axle capable of accurately setting a gap between a magnetizing pulser ring and a magnetic sensor. <P>SOLUTION: A second ring body 27 consists of a second cylindrical part 29 fitted to an inner peripheral face end part of an outer ring member 2 and a sensor supporting part 39 rising from the second cylindrical part 29 in the radial direction and opposing to a side face of a ring fitting part 37 of a first ring body 26 through a predetermined gap. The sensor supporting part 39 is comprised of an outer diameter part 40 that is bent inward in the radial direction from the end part of the second cylindrical part 29, an extending part 41 that is bent along the axial direction from the end part of the outer diameter part 40, and an inner diameter part 42 that is bent inward in the radial direction from the end part of the extending part 41. Due to this structure, the outer diameter part 40 of the second ring body 27 acts as a reference to set a predetermined separation distance in the axial direction between the magnetizing pulser ring 38 and the magnetic sensor 43, and therefore, the predetermined separation distance between the magnetizing pulser ring 38 and the magnetic sensor 43 in the axial direction can be set accurately. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば、車軸用の転がり軸受装置に関する。
【０００２】
【従来の技術】
従来、車軸用の転がり軸受装置における外輪部材と内輪部材との間の環状空間を密封する密封装置に着磁パルサリングを取付け、この着磁パルサリングに軸方向で対向する位置に磁気センサを配置するよう、密封装置とは別部材に磁気センサを取付けたものがある（例えば、特許文献１参照）。
【０００３】
【特許文献１】
特開平５−２６２３３号
【０００４】
【発明が解決しようとする課題】
上記従来の転がり軸受装置では、着磁パルサリングと磁気センサとの間のギャップを正確に設定することが困難であった。
【０００５】
【課題を解決するための手段】
本発明の転がり軸受装置は、固定輪と、この固定輪に同心に配置された回転輪と、前記固定輪と回転輪の対向周面間に配置された回転検出装置とを備え、前記回転検出装置は、前記回転輪に取付けられる第一環体と、前記固定輪に取付けられる第二環体と、シールリングとを有し、前記第一環体は、前記回転輪における前記固定輪との対向周面に嵌着される第一筒状部とこの第一筒状部から径方向に沿うように前記固定輪側に向けて立上げられた第一環状部とを有し、前記第二環体は、前記固定輪における前記回転輪との対向周面に嵌着される第二筒状部とこの第二筒状部から径方向に沿うよう前記回転輪側に向けて立上げられて前記第一環状部と軸方向に対向する第二環状部とを備え、前記シールリングは、前記第二環体の第二筒状部に嵌着される芯金とこの芯金に取付けられて前記第一環体の少なくとも第一筒状部の周面に摺接するシールリップを有する弾性シール体とを備え、前記第一環状体の第一環状部の側面に周方向に交互に磁気特性を変化させたパルサーリングを設け、前記第二環状体の第二環状部に前記パルサーリングと対向してパルサーリングの回転を検出する検出部を設けている。
【０００６】
この構成によれば、芯金に第二環体の第二筒状部を外嵌するようにして、芯金の端面に第二環体の第二環状部の固定輪側基部を当てることで、第一環体の第一環状部と第二環体の第二環状部との間に所定の軸方向距離を有する隙間が生じる。これにより、回転検出装置を回転輪と固定輪との間の空間に装着するのに先立って、第二環状部の固定輪側基部を基準に、第一環体の第一環状部と第二環体の第二環状部との間の距離を正確に設定することができる。
【０００７】
このようにして回転検出装置を組立てた後は、例えば第二環状部の固定輪側基部を軸方向に押圧することで、回転検出装置を回転輪と固定輪との間に、容易にかつ正確に装着することができる。
【０００８】
また、本発明の転がり軸受装置は、前記第一環体の第一筒状部は、第一環状部の基端部から軸方向に延設された延設部を有し、この延設部の周面と前記第二環体の第二環状部の周縁部との間に径方向に微小な寸法を有する密封部が設けられている。
【０００９】
このように第一環状部の延設部周面と第二環体の第二環状部の周縁部との間に非接触の密封部を設けた構成により、回転検出装置は密封装置として、その密封性をいっそう向上させることができる。
【００１０】
【発明の実施の形態】
以下、本発明の実施の形態に係る転がり軸受装置を、車軸用転がり軸受装置を例に、図面に基づいて説明する。
【００１１】
図１は車軸用転がり軸受装置の全体構成を示す断面図、図２は要部部分拡大断面図である。
【００１２】
まず、図１に基づいて車軸用転がり軸受装置１の全体構成を説明する。すなわち、車体側に非回転に支持される固定輪としての外輪部材２と、この外輪部材２に２列の転動体（玉）３を介して軸心回りに回転自在に支持される回転輪としての内輪部材４とを備えている。
【００１３】
外輪部材２の車両インナ側（図において右側）Ｂ外周面に、車体側に組込まれたナックル５を取付けるための取付けフランジ６が一体的に形成される。外輪部材２は、取付けフランジ６にナックル５を介して、車体に軸心回りに非回転に組込まれる。
【００１４】
内輪部材４は、外輪部材２の径方向内方に対向する小径部７と、この小径部７の車両アウタ側（図において左側）Ａに一体的に形成された大径部８とを有する。小径部７の車両インナ側Ｂ端部外周面に環状溝１０が形成され、この環状溝１０に環状部材１１が嵌着されている。小径部７の外周面および環状部材１１の外周面に、保持器１２によって円周方向等配位置に保持された各列の転動体３の内輪軌道面１３ａ，１３ｂがそれぞれ形成されている。内輪部材４の中心には、不図示の駆動軸が挿通する挿通穴１５が形成されている。外輪部材２の内周面に、各列の転動体３の外輪軌道面１４ａ，１４ｂが形成されている。
【００１５】
大径部８の外周面に、ブレーキディスク１６およびタイヤホイール１７を重ねて取付けるためのハブフランジ１８が径方向外方に突出するよう一体的に形成されている。ハブフランジ１８のさらに車両アウタ側Ａに、ブレーキディスク１６およびタイヤホイール１７をハブフランジ１８に取付ける際に案内するための案内部１９が形成されている。
【００１６】
外輪部材２と内輪部材４との間の環状空間２０を軸方向両側で密封するためのインナ側密封装置２１およびアウタ側密封装置２２が設けられている。アウタ側密封装置２２は、図示しないが、外輪部材２の車両アウタ側Ａ端部内周面に嵌着される芯金と、この芯金に固着されて内輪部材４の外周面に接触するシールリップを有する弾性シール体とから構成されている。
【００１７】
次に、図２に基づいてインナ側密封装置２１の構成を詳細に説明する。これは、内輪部材４の軸心回りの回転状態（回転数）を検出する回転検出装置を兼用するものである。すなわちインナ側密封装置２１は、内輪部材４に取付けられた第一環体２６と、シールリップ２４を有する弾性シール体２５を取付けた芯金２３（シールリング）と、外輪部材２に取付けられた第二環体２７とを有する。
【００１８】
第一環体２６は、内輪部材４の車両インナ側Ｂ端部外周面（対向周面に相当する）に嵌着されて所定の軸方向幅を有する第一筒状部２８と、この第一筒状部２８に所定の軸方向幅（後述のラジアルリップ３１，３２が接触するのに充分な幅分）を残して重ね合わせるよう折曲された折曲部（延設部に相当する）３３と、この折曲部３３の車両アウタ側Ａ端部から径方向外方、すなわち外輪部材２側に立上げられて所定の高さ（後述のアキシャルリップ３６が接触するのに充分な幅分）を有する、第一環状部としての環状取付け部３７とを有している。これら第一筒状部２８、折曲部３３および環状取付け部３７は、鋼板をプレス成形することで一体に形成されている。
【００１９】
この環状取付け部３７の車両インナ側Ｂ面には、着磁リング（パルサーリングともいう）３８が固着されている。第一筒状部２８および折曲部３３の折曲部分３３ａの車両インナ側Ｂ端部位置は、環状部材１１の車両インナ側Ｂ端面に軸方向で一致した位置に設定されている。
【００２０】
第二環体２７は、外輪部材２の車両インナ側Ｂ内周面端部（対向周面）に嵌着される第二筒状部２９と、この第二筒状部２９から径方向に沿って、すなわち環状部材１１側に立上げられるとともに第一環体２６の環状取付け部３７の側面に、所定の軸方向距離を有する隙間を介して対向する、第二環状部としてのセンサ支持部３９とを備えている。
【００２１】
このセンサ支持部３９は、第二筒状部２９の車両インナ側Ｂ端部から径方向内方に向けて折曲された固定輪側基部に位置する外径部４０と、この外径部４０の径方向内方端部から軸方向に沿うよう車両インナ側Ｂに折曲して延長された延長部４１と、この延長部４１の端部から径方向内方に向けて折曲された内径部４２とから、鋼板をプレス成形することで一体的に形成されている。
【００２２】
なお、磁気センサ４３が、内径部４２の車両アウタ側Ａ面に取付けられている。磁気センサ４３の径方向中心と着磁リング３８の径方向中心とは互いに一致するよう、それぞれ内径部４２および環状取付け部３７に取付けられている。
【００２３】
センサ支持部３９（内径部４２）の中心に開口３９ａが形成され、この開口３９ａの内径Ｄ１は、折曲部３３の外径Ｄ２よりもわずかに大きく形成されてセンサ支持部３９の内周縁部と折曲部３３の外周面部との間にわずかな隙間δが形成され、かつ開口３９ａと折曲部３３とが軸方向で重なる位置に配置されることで、前記隙間δが非接触の密封部、すなわちシール用のラビリンスとして用いられている。
【００２４】
磁気センサ４３は、コネクタ４４を介して不図示の車体側の制御装置に電気的に接続され、このコネクタ４４は、外輪部材２に形成された取付け孔４５に挿通支持されている。なお、コネクタ４４の径方向内方端部位置と、センサ支持部３９の開口３９ａの内径面とは一致している。
【００２５】
芯金２３は、外輪部材２の内周面端部に前記第二環体２７の第二筒状部２９を介して嵌着される芯金筒状部３０と、この芯金筒状部３０の端部から径方向内方に沿って折曲された芯金環状部４６とから一体的に形成されている。
【００２６】
芯金２３に、弾性シール体２５が固着され、この弾性シール体２５は、前記ラジアルリップ３１，３２およびアキシャルリップ３６を有し、ラジアルリップ３１，３２は第一環体２６の第一筒状部２８表面（外周面）に所定の緊迫力でもって接触し、アキシャルリップ３６は環状取付け部３７の側面に所定の緊迫力でもって接触する。
【００２７】
センサ支持部３９の外径部４０の径方向高さは、芯金２３の芯金筒状部３０の厚みよりわずかに大きく設定され、センサ支持部３９の外径部４０における車両アウタ側Ａ面と芯金２３の芯金筒状部３０における車両インナ側Ｂ端面とが軸方向で接触されている。
【００２８】
上記構成において、内輪部材４とともに着磁リング３８が軸心回りに回転することにより、その回転状態を磁気センサ４３が検出して、例えば内輪部材４の回転数、すなわち車輪の回転数を検出するようになる。
【００２９】
ところで、インナ側密封装置２１は、転動体３を介して外輪部材２および内輪部材４を組付けた後、車両インナ側Ｂから環状空間２０に向けて装着されるものである。従って、インナ側密封装置２１は、環状空間２０に装着するに先立って組立てておく。インナ側密封装置２１を組立てるに際しては、次のようにして行う。
【００３０】
まず、第一環体２６と芯金２３とを、弾性シール体２５を介して互いに組付けるようにし、その後、第二環体２７を第一環体２６および芯金２３の組品に装着するようにする。このとき、芯金２３の芯金環状部４６における車両アウタ側Ａ面を不図示の受け具で受けた状態で、第二環体２７の第二筒状部２９を芯金２３の芯金筒状部３０外周面に外嵌するようにし、かつ第二環体２７のセンサ支持部３９の開口３９ａを第一環体２６の折曲部３３に外嵌するようにして、第二環体２７の第二筒状部２９を芯金２３の芯金筒状部３０外周面に押圧・圧入するようにする。
【００３１】
そしてセンサ支持部３９の外径部４０における車両アウタ側Ａ面が、芯金２３の芯金筒状部３０端面に当接するところで、第二環体２７の押圧・圧入を終了する。このとき、第一環体２６の環状取付け部３７に取付けられている着磁リング３８と、第二環体２７に取付けられている磁気センサ４３との軸方向のギャップは所定の量となる。すなわち、第二環体２７の外径部４０は、インナ側密封装置２１を組立てる際の基準となる機能を有する。
【００３２】
上記のような、第一環体２６、芯金２３および第二環体２７の組品を、第二環体２７の第二筒状部２９の外周面を外輪部材２の内周面に、第一環体２６の第一筒状部２８の内周面を環状部材１１の外周面に押圧・圧入するようにして、外輪部材２および環状部材１１の間の環状空間２０に装着する。
【００３３】
このとき、上記組品を押圧・圧入する治具を用いて、少なくとも第二環体２７の外径部４０の車両インナ側Ｂ端面と、第一筒状部２８および折曲部３３の折曲部分の端部位置とを押圧するようにして、前記組品を装着する。すなわち、第二環体２７の外径部４０は、インナ側密封装置２１を環状空間２０に装着する際の押圧部として用いられる。
【００３４】
このようにして第一環体２６、芯金２３および第二環体２７の組品を、環状空間２０に装着した後、コネクタ４４を外輪部材２に形成してある取付け孔４５に挿通してコネクタ４４を介して不図示の車体側の制御装置に電気的に接続する。
【００３５】
上記のように、本発明の実施の形態では、第二環体２７を、外輪部材２の内周面端部に嵌着される第二筒状部２９と、第二筒状部２９から径方向に沿って立上げられるとともに第一環体２６の環状取付け部３７の側面に所定の軸方向距離を有する隙間を介して対向するセンサ支持部３９とから構成している。
【００３６】
そして、センサ支持部３９を、第二筒状部２９の端部から径方向内方に向けて折曲された外径部４０と、外径部４０の端部から軸方向に沿うよう折曲して延長された延長部４１と、延長部４１の端部から径方向内方に向けて折曲された内径部４２とから一体的に形成している。
【００３７】
この構成により、第二環体２７の外径部４０は、インナ側密封装置２１を組立てる際に、着磁リング３８および磁気センサ４３の軸方向の所定離隔距離を設定するための基準となる。従って、着磁リング３８および磁気センサ４３の軸方向の所定離隔距離を、インナ側密封装置２１を環状空間２０に装着するに先立って正確に設定することができる。
【００３８】
また、インナ側密封装置２１を環状空間２０に装着した後も、着磁リング３８と磁気センサ４３の軸方向の所定距離を正確に保持することができる。
【００３９】
また、第二環体２７の外径部４０は、インナ側密封装置２１を環状空間２０に装着する際に、インナ側密封装置２１を押圧・圧入する際の治具の被押圧部としての機能を有することから、装着の容易性もあわせて実現することができる。
【００４０】
さらに、センサ支持部３９の開口３９ａの内径Ｄ１は、折曲部３３の外径Ｄ２よりもわずかに大きく形成されて内径部４２と折曲部３３との間にわずかな隙間δが形成され、この隙間δがシール用のラビリンスとして用いられている構成であるので、インナ側密封装置２１の密封性を良好にすることができる。
【００４１】
なお上記実施の形態では、磁気センサ４３は、第二環体２７の内径部４２の車両アウタ側面に取付けたが、これに限定されるものではなく、車両インナ側面に取付けてもよく、この場合、インナ側密封装置２１の軸方向寸法をいっそう小型化させることができる。
【００４２】
さらに上記実施の形態では、第一環体２６の環状取付け部３７には、着磁リング３８を別体で設けているが、着磁リング３８を設けることなく第一環体２６の環状取付け部３７そのものの車両インナ側面Ｂに凹凸部を形成してパルス発生用の被検出部として用いることもできる。この場合も上記実施の形態と同様に、着磁リング３８および磁気センサ４３の軸方向の所定離隔距離を、インナ側密封装置２１を環状空間２０に装着するに先立って正確に設定することができ、かつ装着の容易性もあわせて実現することができる。
【００４３】
【発明の効果】
以上の説明から明らかな通り、本発明によれば、着磁パルサリングと磁気センサとの間のギャップを正確に設定することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態を示す車軸用転がり軸受装置の全体構成を示す断面図である。
【図２】同じく要部部分拡大断面図である。
【符号の説明】
１ 車軸用転がり軸受装置
２ 外輪部材
４ 内輪部材
２１ インナ側密封装置
２２ アウタ側密封装置
２３ 芯金
２４ シールリップ
２５ 弾性シール体
２６ 第一環体
２７ 第二環体
２８ 第一筒状部
３３ 折曲部
３７ 環状取付け部
３８ 着磁リング
３９ センサ支持部
４０ 外径部
４１ 延長部
４２ 内径部
δ 隙間[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rolling bearing device for an axle, for example.
[0002]
[Prior art]
Conventionally, a magnetized pulsar ring is mounted on a sealing device for sealing an annular space between an outer ring member and an inner ring member in a rolling bearing device for an axle, and a magnetic sensor is arranged at a position axially opposed to the magnetized pulsar ring. There is a device in which a magnetic sensor is attached to a member separate from the sealing device (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-5-26233
[Problems to be solved by the invention]
In the conventional rolling bearing device described above, it has been difficult to accurately set the gap between the magnetized pulsar ring and the magnetic sensor.
[0005]
[Means for Solving the Problems]
A rolling bearing device according to the present invention includes a fixed wheel, a rotating wheel concentrically disposed on the fixed wheel, and a rotation detecting device disposed between opposed peripheral surfaces of the fixed wheel and the rotating wheel. The device has a first integral body attached to the rotating wheel, a second annular body attached to the fixed wheel, and a seal ring, wherein the first integral body is connected to the fixed wheel of the rotating wheel. A first tubular portion fitted to the opposing peripheral surface, and a first annular portion raised from the first tubular portion toward the fixed wheel side along the radial direction; The ring body is raised toward the rotating wheel side along the radial direction from the second cylindrical portion fitted to the peripheral surface of the fixed wheel facing the rotating wheel and the second cylindrical portion. A second annular portion axially opposed to the first annular portion, wherein the seal ring is fitted to a second cylindrical portion of the second annular body. And a resilient seal body having a seal lip attached to the core bar and slidably in contact with at least a peripheral surface of the first cylindrical portion of the first integral body, wherein a first annular body of the first annular body is provided. A pulsar ring having magnetic properties changed alternately in the circumferential direction is provided on the side surface of the portion, and a detection portion for detecting rotation of the pulsar ring in opposition to the pulsar ring is provided in a second annular portion of the second annular body. I have.
[0006]
According to this configuration, the fixed-ring-side base of the second annular portion of the second annular body is brought into contact with the end face of the second annular body so that the second cylindrical portion of the second annular body is fitted around the core metal. A gap having a predetermined axial distance is generated between the first annular portion of the first integral body and the second annular portion of the second annular body. Accordingly, prior to mounting the rotation detecting device in the space between the rotating wheel and the fixed wheel, the first annular portion and the second annular portion of the first unit are referenced with respect to the fixed wheel side base of the second annular portion. The distance between the annular body and the second annular portion can be set accurately.
[0007]
After assembling the rotation detecting device in this manner, for example, by pressing the fixed wheel side base of the second annular portion in the axial direction, the rotation detecting device can be easily and accurately placed between the rotating wheel and the fixed wheel. Can be attached to
[0008]
Further, in the rolling bearing device of the present invention, the first cylindrical portion of the first integral body has an extension portion extending in the axial direction from a base end of the first annular portion, and the extension portion And a sealing portion having a minute dimension in the radial direction is provided between the peripheral surface of the second annular body and the peripheral edge of the second annular portion of the second annular body.
[0009]
With the configuration in which the non-contact sealing portion is provided between the extension peripheral surface of the first annular portion and the peripheral portion of the second annular portion of the second annular body, the rotation detecting device is a sealing device. The sealing performance can be further improved.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a rolling bearing device according to an embodiment of the present invention will be described with reference to the drawings, taking a rolling bearing device for an axle as an example.
[0011]
FIG. 1 is a cross-sectional view showing the entire configuration of a rolling bearing device for an axle, and FIG. 2 is a partially enlarged cross-sectional view of a main part.
[0012]
First, the overall configuration of the axle rolling bearing device 1 will be described with reference to FIG. That is, an outer ring member 2 as a fixed wheel supported non-rotatably on the vehicle body side, and a rotating wheel rotatably supported on the outer ring member 2 about an axis via two rows of rolling elements (balls) 3. Inner ring member 4.
[0013]
A mounting flange 6 for mounting the knuckle 5 incorporated on the vehicle body side is integrally formed on the outer peripheral surface B of the outer ring member 2 on the vehicle inner side (right side in the figure). The outer ring member 2 is assembled to the vehicle body via the knuckle 5 on the mounting flange 6 in a non-rotating manner around the axis.
[0014]
The inner ring member 4 has a small diameter portion 7 facing radially inward of the outer ring member 2 and a large diameter portion 8 integrally formed on the vehicle outer side (left side in the figure) A of the small diameter portion 7. An annular groove 10 is formed in the outer peripheral surface of the end portion B on the vehicle inner side of the small diameter portion 7, and an annular member 11 is fitted in the annular groove 10. The inner raceway surfaces 13a and 13b of the rolling elements 3 in each row held at equal circumferential positions by the retainer 12 are formed on the outer peripheral surface of the small diameter portion 7 and the outer peripheral surface of the annular member 11, respectively. An insertion hole 15 through which a drive shaft (not shown) is inserted is formed at the center of the inner ring member 4. The outer raceway surfaces 14a and 14b of the rolling elements 3 in each row are formed on the inner peripheral surface of the outer race member 2.
[0015]
On the outer peripheral surface of the large-diameter portion 8, a hub flange 18 for mounting the brake disc 16 and the tire wheel 17 in an overlapping manner is integrally formed so as to protrude radially outward. A guide portion 19 for guiding the brake disk 16 and the tire wheel 17 when the brake disk 16 and the tire wheel 17 are mounted on the hub flange 18 is further formed on the vehicle outer side A of the hub flange 18.
[0016]
An inner sealing device 21 and an outer sealing device 22 for sealing the annular space 20 between the outer ring member 2 and the inner ring member 4 on both axial sides are provided. Although not shown, the outer-side sealing device 22 includes a core bar fitted to the inner peripheral surface of the end A of the vehicle outer side of the outer ring member 2, and a seal lip fixed to the core bar and in contact with the outer peripheral surface of the inner ring member 4. And an elastic seal member having the following.
[0017]
Next, the configuration of the inner sealing device 21 will be described in detail with reference to FIG. This also serves as a rotation detection device that detects the rotation state (the number of rotations) of the inner ring member 4 around the axis. That is, the inner-side sealing device 21 is attached to the outer ring member 2, the first metal body 26 attached to the inner ring member 4, the core bar 23 (seal ring) to which the elastic seal body 25 having the seal lip 24 is attached. A second ring 27.
[0018]
The first integral body 26 is fitted to an outer peripheral surface (corresponding to an opposing peripheral surface) of the vehicle inner side B end portion of the inner race member 4 and has a first cylindrical portion 28 having a predetermined axial width. A bent portion (corresponding to an extended portion) 33 that is bent so as to overlap the cylindrical portion 28 while leaving a predetermined axial width (a width sufficient for radial lips 31 and 32 to be described later to come into contact). A predetermined height (a width sufficient for the axial lip 36 to be described later to come into contact with) by being raised radially outward from the vehicle outer side A end of the bent portion 33, that is, to the outer ring member 2 side. And an annular mounting portion 37 as a first annular portion. The first cylindrical portion 28, the bent portion 33, and the annular mounting portion 37 are integrally formed by press-forming a steel plate.
[0019]
A magnetizing ring (also referred to as a pulsar ring) 38 is fixed to a surface B on the vehicle inner side of the annular mounting portion 37. The vehicle inner side B end position of the bent portion 33 a of the first cylindrical portion 28 and the bent portion 33 is set to a position axially coincident with the vehicle inner side B end surface of the annular member 11.
[0020]
The second annular body 27 has a second cylindrical portion 29 fitted to the inner peripheral surface end (opposed peripheral surface) of the outer ring member 2 on the vehicle inner side B, and extends radially from the second cylindrical portion 29. That is, the sensor support portion 39 as a second annular portion, which is raised to the annular member 11 side and faces the side surface of the annular mounting portion 37 of the first integral body 26 via a gap having a predetermined axial distance. And
[0021]
The sensor support portion 39 includes an outer diameter portion 40 located at a fixed wheel side base bent radially inward from a vehicle inner side B end portion of the second cylindrical portion 29, and an outer diameter portion 40. An extended portion 41 bent from the radially inner end to the vehicle inner side B so as to extend along the axial direction, and an inner diameter bent radially inward from the end of the extended portion 41 From the part 42, the steel plate is formed integrally by press forming.
[0022]
The magnetic sensor 43 is mounted on the vehicle outer side A surface of the inner diameter portion 42. The magnetic sensor 43 is mounted on the inner diameter portion 42 and the annular mounting portion 37 so that the radial center of the magnetic sensor 43 and the radial center of the magnetizing ring 38 match each other.
[0023]
An opening 39a is formed at the center of the sensor support portion 39 (inner diameter portion 42). The inner diameter D1 of the opening 39a is formed slightly larger than the outer diameter D2 of the bent portion 33, and the inner peripheral edge portion of the sensor support portion 39 is formed. A small gap δ is formed between the opening 39a and the outer peripheral surface of the bent portion 33, and the opening 39a and the bent portion 33 are arranged at positions overlapping with each other in the axial direction. Part, ie, a labyrinth for sealing.
[0024]
The magnetic sensor 43 is electrically connected to a vehicle-side control device (not shown) via a connector 44, and the connector 44 is inserted through and supported by a mounting hole 45 formed in the outer race member 2. Note that the position of the radially inner end of the connector 44 coincides with the inner diameter surface of the opening 39a of the sensor support 39.
[0025]
The metal core 23 includes a metal core cylindrical portion 30 fitted to the inner peripheral surface end of the outer ring member 2 via the second cylindrical portion 29 of the second annular body 27, and the metal core cylindrical portion 30. Is formed integrally with the metal core annular portion 46 bent radially inward from the end of the metal core.
[0026]
An elastic seal body 25 is fixed to the core bar 23. The elastic seal body 25 has the radial lips 31 and 32 and an axial lip 36. The radial lips 31 and 32 are the first cylindrical member of the first unit body 26. The surface (outer peripheral surface) of the portion 28 contacts with a predetermined tension, and the axial lip 36 contacts the side surface of the annular mounting portion 37 with a predetermined tension.
[0027]
The radial height of the outer diameter portion 40 of the sensor support portion 39 is set to be slightly larger than the thickness of the metal core cylindrical portion 30 of the metal core 23, and the vehicle outer side A surface of the outer diameter portion 40 of the sensor support portion 39. And the end surface of the core metal cylindrical portion 30 of the core metal 23 on the vehicle inner side B is in axial contact.
[0028]
In the above configuration, when the magnetizing ring 38 rotates around the axis together with the inner ring member 4, the magnetic sensor 43 detects the rotation state, and detects, for example, the rotation speed of the inner ring member 4, that is, the rotation speed of the wheels. Become like
[0029]
By the way, the inner sealing device 21 is attached to the annular space 20 from the vehicle inner side B after the outer ring member 2 and the inner ring member 4 are assembled via the rolling elements 3. Therefore, the inner-side sealing device 21 is assembled before being attached to the annular space 20. When assembling the inner sealing device 21, the following operation is performed.
[0030]
First, the first integral body 26 and the core metal 23 are assembled to each other via the elastic seal body 25, and then the second ring body 27 is attached to the assembly of the first integral body 26 and the core metal 23. To do. At this time, the second cylindrical portion 29 of the second annular body 27 is fixed to the core metal cylinder of the core metal 23 with the vehicle outer side A surface of the metal core ring portion 46 of the metal core 23 received by the receiving member (not shown). The second annular member 27 is fitted to the outer peripheral surface of the second annular member 27, and the opening 39a of the sensor support portion 39 of the second annular member 27 is fitted to the bent portion 33 of the first integral member 26. The second cylindrical portion 29 is pressed and pressed into the outer peripheral surface of the metal core cylindrical portion 30 of the metal core 23.
[0031]
Then, when the vehicle outer side A surface of the outer diameter portion 40 of the sensor support portion 39 comes into contact with the end face of the metal core cylindrical portion 30 of the metal core 23, the pressing and press-fitting of the second ring body 27 ends. At this time, the axial gap between the magnetized ring 38 attached to the annular attachment portion 37 of the first integral body 26 and the magnetic sensor 43 attached to the second annular body 27 is a predetermined amount. That is, the outer diameter portion 40 of the second annular body 27 has a function as a reference when assembling the inner-side sealing device 21.
[0032]
The assembly of the first integral body 26, the core bar 23, and the second annular body 27 as described above is obtained by attaching the outer peripheral surface of the second cylindrical portion 29 of the second annular body 27 to the inner peripheral surface of the outer ring member 2. The inner peripheral surface of the first cylindrical portion 28 of the first integral body 26 is attached to the annular space 20 between the outer ring member 2 and the annular member 11 so as to be pressed and pressed into the outer peripheral surface of the annular member 11.
[0033]
At this time, at least the end face of the outer diameter portion 40 of the second annular body 27 on the vehicle inner side B and the bending of the first cylindrical portion 28 and the bent portion 33 are performed by using a jig for pressing and press-fitting the assembly. The assembly is mounted such that the end position of the portion is pressed. That is, the outer diameter portion 40 of the second annular body 27 is used as a pressing portion when the inner sealing device 21 is attached to the annular space 20.
[0034]
After the assembly of the first integral body 26, the core bar 23, and the second annular body 27 is mounted in the annular space 20 in this manner, the connector 44 is inserted through the mounting hole 45 formed in the outer ring member 2 and inserted. It is electrically connected to a control device (not shown) on the vehicle body via the connector 44.
[0035]
As described above, in the embodiment of the present invention, the second annular body 27 is formed by the second cylindrical portion 29 fitted to the end of the inner peripheral surface of the outer ring member 2, and And a sensor support portion 39 that stands up along the direction and faces a side surface of the annular mounting portion 37 of the first body 26 via a gap having a predetermined axial distance.
[0036]
Then, the sensor support portion 39 is bent outward from the end of the second cylindrical portion 29 inward in the radial direction, and is bent along the axial direction from the end of the outer diameter portion 40. The extended portion 41 is formed integrally from an extended portion 41 and an inner diameter portion 42 bent radially inward from an end of the extended portion 41.
[0037]
With this configuration, the outer diameter portion 40 of the second ring 27 serves as a reference for setting a predetermined axial distance between the magnetizing ring 38 and the magnetic sensor 43 when assembling the inner sealing device 21. Therefore, the predetermined separation distance in the axial direction between the magnetizing ring 38 and the magnetic sensor 43 can be accurately set before the inner sealing device 21 is mounted on the annular space 20.
[0038]
Further, even after the inner sealing device 21 is mounted in the annular space 20, a predetermined axial distance between the magnetizing ring 38 and the magnetic sensor 43 can be maintained accurately.
[0039]
The outer diameter portion 40 of the second annular body 27 functions as a pressed portion of a jig when the inner sealing device 21 is pressed and pressed when the inner sealing device 21 is mounted in the annular space 20. Therefore, ease of mounting can be achieved at the same time.
[0040]
Further, the inner diameter D1 of the opening 39a of the sensor support portion 39 is formed slightly larger than the outer diameter D2 of the bent portion 33, and a slight gap δ is formed between the inner diameter portion 42 and the bent portion 33, Since the gap δ is used as a labyrinth for sealing, the sealing performance of the inner sealing device 21 can be improved.
[0041]
In the above-described embodiment, the magnetic sensor 43 is attached to the inner side surface of the inner diameter portion 42 of the second ring body 27. However, the present invention is not limited to this, and the magnetic sensor 43 may be attached to the inner side surface of the vehicle. Further, the axial dimension of the inner sealing device 21 can be further reduced.
[0042]
Further, in the above embodiment, the magnetized ring 38 is provided separately from the annular attachment portion 37 of the first integral body 26, but the annular attachment portion of the first integral body 26 is not provided without the magnetized ring 38. An uneven portion may be formed on the inner side surface B of the vehicle 37 itself to be used as a detected portion for pulse generation. Also in this case, similarly to the above embodiment, the predetermined separation distance in the axial direction between the magnetizing ring 38 and the magnetic sensor 43 can be accurately set before the inner sealing device 21 is mounted on the annular space 20. In addition, easiness of mounting can also be realized.
[0043]
【The invention's effect】
As apparent from the above description, according to the present invention, the gap between the magnetized pulsaring and the magnetic sensor can be accurately set.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an overall configuration of an axle rolling bearing device according to an embodiment of the present invention.
FIG. 2 is an enlarged sectional view of a main part of the same.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rolling bearing device for axle 2 Outer ring member 4 Inner ring member 21 Inner side sealing device 22 Outer side sealing device 23 Core 24 Seal lip 25 Elastic seal 26 First part 27 Second ring 28 First cylindrical part 33 Fold Curved portion 37 Annular mounting portion 38 Magnetizing ring 39 Sensor support portion 40 Outer diameter portion 41 Extension portion 42 Inner diameter portion δ Gap

Claims (2)

固定輪と、この固定輪に同心に配置された回転輪と、前記固定輪と回転輪の対向周面間に配置された回転検出装置とを備えた転がり軸受装置であって、
前記回転検出装置は、前記回転輪に取付けられる第一環体と、前記固定輪に取付けられる第二環体と、シールリングとを有し、
前記第一環体は、前記回転輪における前記固定輪との対向周面に嵌着される第一筒状部とこの第一筒状部から径方向に沿うように前記固定輪側に向けて立上げられた第一環状部とを有し、
前記第二環体は、前記固定輪における前記回転輪との対向周面に嵌着される第二筒状部とこの第二筒状部から径方向に沿うよう前記回転輪側に向けて立上げられて前記第一環状部と軸方向に対向する第二環状部とを備え、
前記シールリングは、前記第二環体の第二筒状部に嵌着される芯金とこの芯金に取付けられて前記第一環体の少なくとも第一筒状部の周面に摺接するシールリップを有する弾性シール体とを備え、
前記第一環状体の第一環状部の側面に周方向に交互に磁気特性を変化させたパルサーリングを設け、前記第二環状体の第二環状部に前記パルサーリングと対向してパルサーリングの回転を検出する検出部を設けた、ことを特徴とする転がり軸受装置。A fixed bearing, a rolling bearing concentrically disposed on the fixed bearing, and a rolling bearing device including a rotation detecting device disposed between opposed peripheral surfaces of the fixed bearing and the rotating bearing,
The rotation detection device has a first integral body attached to the rotating wheel, a second ring attached to the fixed wheel, and a seal ring,
The first integral body has a first cylindrical portion fitted to a peripheral surface of the rotating wheel facing the fixed wheel, and is directed toward the fixed wheel side along the radial direction from the first cylindrical portion. Having a first annular portion that has been set up,
The second annular body has a second cylindrical portion fitted on the peripheral surface of the fixed wheel facing the rotating wheel, and stands toward the rotating wheel side along the radial direction from the second cylindrical portion. A second annular portion that is raised and is axially opposed to the first annular portion,
The seal ring includes a metal core fitted to the second cylindrical portion of the second ring, and a seal attached to the metal core and slidably contacting at least a peripheral surface of the first cylindrical portion of the first integral body. An elastic seal having a lip,
A pulsar ring having magnetic characteristics changed alternately in the circumferential direction is provided on the side surface of the first annular portion of the first annular body, and the pulsar ring faces the pulsar ring on the second annular portion of the second annular body. A rolling bearing device provided with a detection unit for detecting rotation. 請求項１の転がり軸受装置において、
前記第一環体の第一筒状部は、第一環状部の基端部から軸方向に延設された延設部を有し、この延設部の周面と前記第二環体の第二環状部の周縁部との間に径方向に微小な寸法を有する密封部が設けられた、ことを特徴とする転がり軸受装置。The rolling bearing device according to claim 1,
The first cylindrical portion of the first integral body has an extended portion extending in the axial direction from a base end of the first annular portion, and a peripheral surface of the extended portion and the second annular body. A rolling bearing device, wherein a sealing portion having a minute dimension in a radial direction is provided between the sealing portion and a peripheral portion of the second annular portion.
JP2002372497A 2002-12-24 2002-12-24 Rolling bearing device Pending JP2004204892A (en)

Priority Applications (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006064066A (en) * 2004-08-26 2006-03-09 Nok Corp Sealing device with rotary encoder
WO2006057176A1 (en) * 2004-11-29 2006-06-01 Jtekt Corporation Bearing device for wheel
KR101217726B1 (en) * 2010-10-04 2013-01-02 한국에스케이에프씰 주식회사 crank shaft's oil seal
JP2014219100A (en) * 2009-09-17 2014-11-20 Ntn株式会社 Wheel bearing device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006064066A (en) * 2004-08-26 2006-03-09 Nok Corp Sealing device with rotary encoder
JP4535253B2 (en) * 2004-08-26 2010-09-01 Ｎｏｋ株式会社 Sealing device with rotary encoder
WO2006057176A1 (en) * 2004-11-29 2006-06-01 Jtekt Corporation Bearing device for wheel
JP2006153112A (en) * 2004-11-29 2006-06-15 Jtekt Corp Bearing device for wheel
JP2014219100A (en) * 2009-09-17 2014-11-20 Ntn株式会社 Wheel bearing device
KR101217726B1 (en) * 2010-10-04 2013-01-02 한국에스케이에프씰 주식회사 crank shaft's oil seal

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