JP2004144182A - Rolling bearing device - Google Patents

Rolling bearing device Download PDF

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Publication number
JP2004144182A
JP2004144182A JP2002309181A JP2002309181A JP2004144182A JP 2004144182 A JP2004144182 A JP 2004144182A JP 2002309181 A JP2002309181 A JP 2002309181A JP 2002309181 A JP2002309181 A JP 2002309181A JP 2004144182 A JP2004144182 A JP 2004144182A
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Japan
Prior art keywords
ring member
inner ring
rolling bearing
bearing device
vehicle
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Granted
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JP2002309181A
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Japanese (ja)
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JP4078945B2 (en
Inventor
Yoshibumi Shige
重　義文
Koji Inoue
井上　孝治
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Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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Priority to JP2002309181A priority Critical patent/JP4078945B2/en
Publication of JP2004144182A publication Critical patent/JP2004144182A/en
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Publication of JP4078945B2 publication Critical patent/JP4078945B2/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
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J9/00—Forging presses
    • B21J9/02—Special design or construction
    • B21J9/025—Special design or construction with rolling or wobbling dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K25/00—Uniting components to form integral members, e.g. turbine wheels and shafts, caulks with inserts, with or without shaping of the components
    • 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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • 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)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem wherein a hub shaft of a rolling bearing device for a vehicle has a solid cross section, has a part along three directions, and requires a pressing machine for applying large pressure to increase manufacturing cost, and the reduction of the manufacturing cost is considered by manufacturing a guide section separately from the hub shaft, but design of a caulking corresponding part can be required. <P>SOLUTION: The guide member 28 is disposed separately from an inner ring member 5, a second inner ring member 10 is formed in a cylindrical shape, and a rib 27 of which one side end lies on the way on a conical peripheral wall surface 24 and the other end is extended to a cylindrical peripheral wall surface 22 is formed integrally with the large diameter section 15 and an intermediate diameter section 17. When the end of the second inner ring member 10 is caulked to the end surface of a first inner ring member 9, part of caulking load is supported by the rib 27. Even when the second inner ring member 10 is formed in the cylindrical shape having different inner diameter, deformation of the second inner ring member 10 is prevented during caulking, and required preload and inner clearance can be secured. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば車両用の転がり軸受装置に関する。
【０００２】
【従来の技術】
従来の車両用の転がり軸受装置には、車体側に非回転に支持される外輪部材と、この外輪部材に複列の玉を介して軸心回りに回転自在に支持されたハブ軸と、このハブ軸の車両インナ側相当部に嵌合する筒状部材とを備えたものがある（例えば、特許文献１参照）。
【０００３】
以下、図６に基づいて、従来の車両用の転がり軸受装置１１０の構成を説明する。図６は、転がり軸受装置１１０の製造途中の状態を示している。図において、符号１１１は筒状の外輪部材を示し、この外輪部材１１１は、外周面の軸方向途中に径方向外方に突出する取付けフランジ１１２が形成されている。符号１１３は軸方向に離隔して配置された２列の玉を示しており、これら各列の玉１１３は、それぞれ保持器１１５によって円周方向等配位置に保持されている。
【０００４】
１１６はハブ軸を示している。このハブ軸１１６は中実断面に形成されており、外輪部材１１１の径方向内方に配置されて軸方向一方に沿う軸部１１７と、径方向外方に突出するハブフランジ１１８と、ブレーキディスクおよびタイヤホイールをハブフランジ１１８に重ねて取付ける際に案内する、軸方向他方に沿った案内部１１９とが、熱間鍛造によって一体形成されている。外輪部材１１１の内周面に、玉１１３の内輪軌道面が形成されている。
【０００５】
軸部１１７の軸方向一方側端部外周面に、環状凹部１２０が形成され、この環状凹部１２０に筒状部材１２１が嵌合されている。軸部１１７の外周面および筒状部材１２１の外周面に、それぞれ玉１１３の内輪軌道面が形成されている。
【０００６】
このような転がり軸受装置１１０をかしめ受け治具１１４に載置し、かしめ治具１２２を用いて軸部１１７の軸方向一方側端部を拡径するように筒状部材１２１の端面にかしめることで、ハブ軸１１６と筒状部材１２１とが回転一体とされるとともに、所定量の予圧が付与される。
【０００７】
【特許文献１】
特開２００１−１６２３３８号（第４頁，第２図）
【０００８】
【発明が解決しようとする課題】
上記従来の車両用の転がり軸受装置１１０では、ハブ軸１１６は中実断面であり、軸方向一方に沿う軸部１１７と、径方向外方に突出するハブフランジ１１８と、軸方向他方に沿った案内部１１９とが熱間鍛造によって形成されている。このように異なった三方向に沿う部分を有する部材を熱間鍛造によって製造するためには、大圧力を加えるためのプレス機を必要とするなど、高価で大掛かりな装置を必要とする。また、熱間鍛造では製品精度が確保しにくいので、旋削、研磨などの後加工が多く必要であり、工程数が増加して、製造コストが高くなる。
【０００９】
このため、案内部１１９をハブ軸１１７とは別体に製造することで、ハブ軸１１７をハブフランジ１１８と一方列の玉１１３の内輪軌道面を有する軸部１１７とから構成して製造コストの低減等を図ることが考えられる。しかしこの場合、かしめ相当部の工夫が必要になることがある。
【００１０】
【課題を解決するための手段】
本発明における転がり軸受装置は、外輪部材と、この外輪部材の径方向内方で外輪部材と同心に配置された内輪部材と、前記外輪部材の内周面に形成された外輪軌道面と内輪部材の外周面に形成された内輪軌道面との間に転動自在に配置される複数列の転動体とを含み、前記内輪部材は、軸方向一方側に配置される第一内輪部材と、この第一内輪部材に軸方向で接合される筒状部を有する第二内輪部材とから構成され、前記第一内輪部材の中心に形成された挿通穴に前記第二内輪部材が挿通されるとともに、その軸方向一方側端部が拡径するように第一内輪部材の軸方向一方側端面にかしめられ、前記第二内輪部材の内周面他方側に複数個のリブが設けられている。
【００１１】
上記構成において、第一内輪部材の挿通穴に第二内輪部材を挿通し、その軸方向一方側端部を拡径するように第一内輪部材の軸方向一方側端面にかしめる際、そのかしめ力の一部は第二内輪部材の内周面他方側に形成された複数個のリブによって負担されるため、第二内輪部材がかしめ時に座屈により変形するのが防止され、必要な内部すき間が確保される。
【００１２】
また、前記第一内輪部材および第二内輪部材のうち、少なくとも第二内輪部材が冷間鍛造によって形成されている構成によれば、転がり軸受装置の製造が容易となり、製造コストが低減される。
【００１３】
さらに、前記外輪部材または内輪部材のうち何れかに、径方向外方に突出するフランジが設けられ、このフランジにブレーキディスクおよびタイヤホイールを重ねて取付ける際に案内する案内部材が、前記内輪部材および外輪部材とは別体に設けられている。
【００１４】
このように、案内部材を内輪部材および外輪部材とは別体とする構成により、外輪部材または内輪部材のうち、回転輪となる方の構成が簡略化されるので、製造が容易となり、製造コストが低減される。
【００１５】
【発明の実施の形態】
以下、本発明の実施形態に係る転がり軸受装置を、図面に基づいて説明する。（第一の実施形態）
図１ないし図３に基づいて、本発明の第一の実施形態を説明する。図では転がり軸受装置を、内輪回転型で、かつ車両における従動輪側に用いられる場合について示している。図１は本発明の実施形態に係る転がり軸受装置の全体構成を示す断面図、図２は図１のＡ−Ａ線断面図、図３はかしめ作業時の断面図である。
【００１６】
図１に示すように、この実施形態における転がり軸受装置１は、外輪部材２と、転動体としての２列の玉３，４と、内輪部材５とを有する。外輪部材２は、熱間鍛造によって形成されている。外輪部材２は、その内周面に軸方向に離隔した位置に、２列の外輪軌道面６ａ，６ｂを有する。この外輪部材２は、その軸方向途中位置に、径方向外方に突出した支持フランジ７が形成されされている。この支持フランジ７が、不図示の車体側に組込まれるナックルに取付けられることで、外輪部材２が車体に対して軸心回りに非回転に支持される。
【００１７】
外輪部材２の車両インナ側端部に、カバー８が嵌着されている。このカバー８は、不図示の車速センサーを内装する空間を確保するためのものである。各列の玉３，４は、それぞれ冠形保持器３ａ，４ａによって円周方向等配位置に保持されている。
【００１８】
内輪部材５は、それぞれ外輪部材２と同心に配置される第一内輪部材９と第二内輪部材１０とから構成される。第一内輪部材９は、炭素鋼（例えば、ＪＩＳ規格Ｓ５５Ｃ）を熱間鍛造により形成される。第一内輪部材９は、その外周面に一方の外輪軌道面６ａに径方向で対応する一方列の玉３の内輪軌道面９ａが形成された筒状部１１と、この筒状部１１の車両アウタ側、すなわち軸方向一方側の端部外周面に、径方向外方に突出するよう形成されたハブフランジ１２とを有する。
【００１９】
このハブフランジ１２は、ブレーキディスク１３およびタイヤホイール１４が重ねて取付けられるものである。このように、第一内輪部材９は、軸方向一方側に沿う筒状部１１と、径方向に沿うハブフランジ１２から一体的に形成されている。
【００２０】
第二内輪部材１０は、管状またはリング状、あるいは平板状の素材（例えば、ＪＩＳ規格Ｓ５５Ｃ）から冷間鍛造によって一体に形成されている。この第二内輪部材１０は、全体が中空の筒状に形成され、車両インナ側すなわち軸方向他方側の端部に形成された環状の大径部１５と、車両アウタ側の筒状の小径部１６と、大径部１５と小径部１６とを連続するようそれらの中間部位に形成されて、大径部１５の直径と小径部１６の直径の間の大きさの直径を有する中径部１７とから形成されている。
【００２１】
大径部１５と中径部１７の外周連続面部分が、前記他方の外輪軌道面６ｂに径方向で対応した他方列の玉４の内輪軌道面１０ａとされている。第二内輪部材１０における中径部１７と小径部１６との連続面（外周面）は、径方向内方に縮径して第一内輪部材９の当接面１８に軸方向で当接する当接面１９とされる。
【００２２】
第二内輪部材１０の径方向中心部に形成された軸方向に貫通する中心穴２０において、その周壁面は、車両インナ側の大径中心穴２０ａを形成する円筒状周壁面２２と、車両アウタ側の小径中心穴２０ｂを形成する円筒状周壁面２３と、両円筒状周壁面２２，２３を前記当接面１８，１９の径方向内方の対応する位置で連続する円錐状周壁面２４から形成されている。この円錐状周壁面２４の大径側端２４ａは、前記当接面１８，１９よりも車両インナ側に位置付けられている。
【００２３】
第一内輪部材９の中心に形成された挿通穴２５に、第二内輪部材１０の小径部１６が挿通されるとともに、その車両アウタ側端部が拡径するように、第一内輪部材９のハブフランジ１２の車両アウタ側端面１２ａにかしめられて、かしめ部２６が形成されている。
【００２４】
第二内輪部材１０の、円筒状周壁面２２に、軸方向に沿った複数条のリブ２７が、円周方向等配位置に一体的に形成されている。これらリブ２７はスプライン形状に形成され、各リブ２７の一方側端部は、円錐状周壁面２４の途中に位置し、他方側端部は、円筒状周壁面２２の車両インナ側端部まで延長されている。図２に示すように、各リブ２７の内径を連ねた仮想円径Ｄ１は、円筒状周壁面２３よりも大径で、円筒状周壁面２２よりも小径に形成されている。
【００２５】
ブレーキディスク１３およびタイヤホイール１４を、ハブフランジ１２に重ねるように取付ける際に案内するための、内輪部材５とは別体の案内部材（インロー部材ともいう）２８が設けられている。この案内部材２８は、平板状の素材（例えば、ＪＩＳ規格Ｓ５５Ｃ）から、冷間鍛造によって一体的に形成される。
【００２６】
案内部材２８は、径方向中心に形成されるとともに第一内輪部材９の小径中心穴２０ｂ（円筒状周壁面２３）に圧入される有底形状の円筒状嵌込部３０と、この円筒状嵌込部３０の端部から径方向外向きに拡径される平板部３１と、この平板部３１の径方向外側端部から車両インナ側に向けて折曲される環状の案内部３２とを有して、かしめ部２６を覆うように設けられている。案内部３２の外周面が、ブレーキディスク１３およびタイヤホイール１４のそれぞれに形成された中央穴１３ａ，１４ａの周面を案内する部分である。
【００２７】
さらに転がり軸受装置１は、外輪部材２と内輪部材５との間の環状空間を、その車両アウタ側でシールするためのシール装置３３を有する。このシール装置３３は、外輪部材２の車両アウタ側端部内周面に嵌着される芯金と、この芯金に取付けられて第一内輪部材９の対向部分に接触するリップを有する弾性シール体とから構成されている。
【００２８】
図の符号３５は、ハブボルトを示す。このハブボルト３５は、ハブフランジ１２の円周方向所定位置で挿通孔１２ｂに圧入されている。ブレーキディスク１３およびタイヤホイール１４は、それぞれ中央穴１３ａ，１４ａを案内部材２８の案内部３２に沿うように、またハブボルト３５を盤面の孔部１３ｂ，１４ｂに挿通するように、ハブフランジ１２に対して図の仮想線で示すように重ねられる。ブレーキディスク１３およびタイヤホイール１４は、ハブボルト３５に不図示のナット部材を螺着することでハブフランジ１２に固定される。
【００２９】
上記構成の転がり軸受装置１の製造手順を説明する。まず、外輪部材２に各列の玉３，４を、冠形保持器３ａ，４ａに保持させた状態で、各列の玉３，４が外輪軌道面６ａ，６ｂに嵌合するように組付ける。続いて、図３に示すように、予めかしめ受け治具３６の円柱状凸部３７（外輪部材２の車両アウタ側相当部開口と同等の径を有している）に車両インナ側を下方にして載置しておいた第二内輪部材１０に外嵌するように、前述の各列の玉３，４を組込んだ状態の外輪部材２を組込む。
【００３０】
そして、筒状部１１の内輪軌道面９ａが一方列の玉３に嵌合するように、第一内輪部材９を上方から組込む。このようにすると、第二内輪部材１０における円筒状のかしめ予定部（同図仮想線で示す）１０ｂが、第一内輪部材９のハブフランジ１２における車両アウタ側端面１２ａから上方に突出した状態となる。
【００３１】
ここで、かしめ治具３８の先端部３９を第二内輪部材１０の小径中心穴２０ｂに挿入し、かしめ治具３８に所定のかしめ力を付与しながらローリングさせることで、かしめ予定部１０ｂを拡径するようにして、ハブフランジ１２の車両アウタ側端面に圧接してかしめ部２６を形成する。これにより、所定量の予圧および所定量の内部すき間を付与する。
【００３２】
ところで、第二内輪部材１０は内径が異なった円筒形状に形成されている。このため、かしめ時にその荷重が軸方向に働いた場合、第二内輪部材１０が座屈により変形し易く、所定の内部すき間が確保しにくくなることが考えられる。
【００３３】
しかし、この実施形態では、第二内輪部材１０の大径部１５と中径部１７には、一方側端部が円錐状周壁面２４の途中に位置し、他方側端部が大径中心穴２１を形成する円筒状周壁面２２まで延長された複数条のリブ２７が、円周方向等配位置に一体的に形成されている。このため、かしめ時には、その荷重の一部をこれらリブ２７で支持することになる。これによって、第二内輪部材１０が、内径が異なった薄肉の円筒形状に形成されていたとしても、かしめ時に第二内輪部材１０の変形を防止し、所定量の（必要な）予圧および内部すき間を確保することができる。
【００３４】
このようにして製造した転がり軸受装置１では、車両が走行すると、不図示の車輪の回転とともに、内輪部材５、すなわち第一内輪部材９および第二内輪部材１０が軸心回りに回転する。
【００３５】
そして、第二内輪部材１０は、管状等の素材を用いて中空円筒状に形成しているので、中実断面に形成する場合に比べて重量が軽くでき、車両重量の低減（特に、ばね下重量の低減）が可能になる。しかも、従来のように熱間鍛造によって形成する場合に比べて高精度に第二内輪部材１０を形成することができる。
【００３６】
すなわち熱間鍛造の場合は製品の表面精度も低く、特に玉４の内輪軌道面１０ａを必要な精度とするための研磨加工時間を長く必要とし、場合によっては内輪軌道面１０ａ以外の部分も研磨加工を必要とすることが考えられる。これに対して、管状等の素材を用いて冷間鍛造によって第二内輪部材１０を形成する場合は、製品の精度がよいので、内輪軌道面１０ａを必要な精度とするための研磨加工時間が短縮でき、内輪軌道面１０ａ以外の部分の研磨加工をほとんど必要としない。これによって、製造コストを低減し得る。
【００３７】
また、第一内輪部材９は、軸方向一方側に沿う筒状部１１および径方向に沿うハブフランジ１２の、二方向に沿う部分から形成されるものであるため、従来のように三方に突出するハブ軸を熱間鍛造によって形成する場合に比べて、小規模の装置であっても対応できるようになり、さらに製造コストを低減することができる。
（第二の実施の形態）
図４は、第二の実施の形態に係る転がり軸受装置の全体構成を示す断面図である。この実施形態における転がり軸受装置５０も、上記第一の実施形態と同様、内輪回転型である。
【００３８】
この実施形態において、外輪部材５１は、管状あるいは平板状等の素材から冷間鍛造によって一体的に形成される。この外輪部材５１は、筒状の胴体部５３と、車体側に取付けられる支持フランジ５２とから形成され、支持フランジ５２は、胴体部５３の車両インナ側端部、すなわち軸方向一方側端部から径方向外方に突出されるように形成されている。胴体部５３の内周面に両列の玉５４，５５の外輪軌道面５３ａ，５３ｂが形成されている。
【００３９】
内輪部材５６は、第一内輪部材５７と第二内輪部材５８とから構成される。第二内輪部材５８は、管状あるいは平板状等の素材から冷間鍛造によって一体的に形成されるもので、外輪部材５１の径方向内方に配置される筒状部５９と、この筒状部５９の車両アウタ端部、すなわち軸方向他方側端部に、径方向外方に突出するよう形成されたハブフランジ６０とを有する。
【００４０】
筒状部５９は、車両アウタ側の大径部６１と、車両インナ側の小径部６２とから形成されている。大径部６１の外周面途中に、他方列の玉５５の内輪軌道面６１ａが形成されている。小径部６２に筒状の第一内輪部材５７が嵌合されている。大径部６１の外周面と小径部６２の外周面とは、大径部６１の外周面から径方向内方に縮径した当接面６３によって連続しており、この当接面６３は、第一内輪部材５７の車両アウタ側端面である当接面６４と軸方向で当接する面である。
【００４１】
第二内輪部材５８の車両インナ側端部が径方向外方に拡径されることで、第一内輪部材５７の車両インナ側端面にかしめられて、かしめ部６５が形成されている。筒状部５９における大径部６１の円筒状周壁面６６と、小径部６２の円筒状周壁面６７とは、円錐状周壁面６８によって連続している。円錐状周壁面６８の車両アウタ側端部６８ａは、当接面６３，６４よりも車両アウタ側に位置している。
【００４２】
第二内輪部材５８の、大径中心穴６９を形成する円筒状周壁面６６に、軸方向に沿った複数条のリブ７０が、円周方向等配位置に一体的に形成されている。これらリブ７０は、スプライン形状に形成され、各リブ７０の他方側端部は、円筒状周壁面６６の軸方向途中に位置し、一方側端部は、円錐状周壁面６８の途中に位置している。各リブ７０の内径を連ねた仮想円径は、大径部６１の大径中心穴６９を形成する円筒状周壁面６６よりも小径で、小径部６２の小径中心穴７１を形成する円筒状周壁面６７よりも大径に形成されている。
【００４３】
この転がり軸受装置５０には、内輪部材５６とは別体の案内部材７２が設けられている。この案内部材７２は、管状あるいは平板状等の素材から冷間鍛造によって形成される。この案内部材７２は、円筒状周壁面６６に嵌着して車両インナ側が開放された嵌着部７４と、ハブフランジ６０から車両アウタ側に突出する、有底筒状の案内部７５とから一体的に形成される。なお嵌着部７４は、リブ７０の他方側端部近傍まで円筒状周壁面６６に挿入されている。
【００４４】
この転がり軸受装置５０は、外輪部材５１の車両インナ側開口を被覆する有底状のカバー７６を備え、このカバー７６の嵌着部７３が外輪部材５１の車両インナ側開口部周面に嵌着されている。
【００４５】
案内部材７２の底面に回転信号発信部材としてのパルサーリング７７が固着されている。案内部材７２の内部空間７２ａおよび第二内輪部材５８の両中心穴６９，７１は、パルサーリング７７からの信号に基づいて内輪部材５６の回転状態（例えば回転数）を検出する検出器７８が挿入される空間として用いられる。符号１３，１４は、それぞれブレーキディスクおよびタイヤホイールを示す。符号３３は、上記第一の実施形態と同様の構成を有するシール装置、符号３５は、ハブボルトをそれぞれ示す。
【００４６】
上記構成の転がり軸受装置５０において、車両アウタ側を下方に配置してかしめ部６５を形成する際に、第二内輪部材５８の、大径中心穴６９を形成する円筒状周壁面６６に、軸方向に沿った複数条のリブ７０が、円周方向等配位置に一体的に形成されているので、かしめ時の荷重の一部をこれらリブ７０で支持することになる。これによって、第二内輪部材５８が、内径が異なった円筒形状に形成されていたとしても、かしめ時に第二内輪部材５８の変形を防止し、所定量の予圧および内部すき間を確保することができる。
【００４７】
外輪部材５１および内輪部材５６を管状あるいは平板状等の素材を用いて冷間鍛造で製造することにより、転がり軸受装置５０が軽量化されること、製造コストが低減されることは、上記第一の実施形態と同様である。
（第三の実施の形態）
上記第一の実施形態、および第二の実施形態における転がり軸受装置１，５０は、内輪回転型であったが、第三の実施の形態における転がり軸受装置８０は、外輪回転型である。
【００４８】
この実施形態では、外輪部材８１が筒状の胴体部８２と、この胴体部８２の車両アウタ側端部に径方向外方に突出形成されたハブフランジ８４とから、管状あるいは平板状等の素材を用いて冷間鍛造によって一体的に形成されている。胴体部８２の内周面に両列の玉８５，８６の外輪軌道面８２ａ，８２ｂが形成されている。
【００４９】
転がり軸受装置８０は、外輪部材８１の車両アウタ側開口を被覆する案内部材８７を有している。この案内部材８７は、管状あるいは平板状等の素材を用いて冷間鍛造によって形成される。この案内部材８７は、外輪部材８１の車両アウタ側内周壁に嵌着して車両インナ側が開放された嵌着部８８と、ハブフランジ８４から車両アウタ側に突出する、有底筒状の案内部８９とから一体的に形成される。
【００５０】
内輪部材９０は、第一内輪部材９１と、第二内輪部材９２とから構成される。第一内輪部材９１は筒状に形成され、その外周面に、一方列の玉８５の内輪軌道面９１ａが形成されている。第二内輪部材９２は、管状あるいは平板状等の素材を冷間鍛造することによって形成されるもので、筒状の胴体部８３と、この胴体部８３の車両インナ側端部から径方向外方に突出するよう形成された取付けフランジ９３とを有している。この取付けフランジ９３が、車体側に取付けられることで、内輪部材９０が軸心回りに非回転に支持される。
【００５１】
胴体部８３は、車両アウタ側の小径部９４と車両インナ側の大径部９５とから一体的に形成されている。前記第一内輪部材９１は、小径部９４に外嵌され、小径部９４の車両アウタ側端部、すなわち軸方向一方側端部が拡径されるようにして、第一内輪部材９１の車両アウタ側端面にかしめられることで、かしめ部９６が形成されている。
【００５２】
大径部９５の大径中心穴９７を形成する円筒状周壁面９８に、軸方向に沿った複数条のリブ１００が、円周方向等配位置に一体的に形成されている。これらリブ１００は、スプライン形状に形成され、各リブ１００の一方側端部は、小径部９４の小径中心穴９９ａを形成する円筒状周壁面９９と、前記円筒状周壁面９８とを連続する円錐状周壁面１０２の途中に位置している。各リブ１００の内径を連ねた仮想円径は、円筒状周壁面９８よりも小径で、円筒状周壁面９９ａよりも大径に形成されている。
【００５３】
案内部材８７の底面に、回転信号発信部材としてのパルサーリング７７が固着されている。また、案内部材８７の内部空間８７ａは、パルサーリング７７からの信号に基づいて内輪部材９０の回転状態（例えば回転数）を検出する検出器７８が挿入される空間として用いられ、検出器７８は、小径部９４の円筒状周壁面９９に嵌合支持されている。
【００５４】
符号１３，１４は、それぞれブレーキディスクおよびタイヤホイールを示す。符号３３は、上記第一の実施形態と同様の構成を有するシール装置、符号３５は、ハブボルトをそれぞれ示す。
【００５５】
上記構成の転がり軸受装置８０において、車両インナ側を下方に配置してかしめ部９６を形成する際に、第二内輪部材９２の大径中心穴９７を形成する円筒状周壁面９８に、軸方向に沿った複数条のリブ１００が、円周方向等配位置に一体的に形成されているので、かしめ時の荷重の一部をこれらリブ１００で支持することになる。これによって、第二内輪部材９２が、内径が異なった薄肉の円筒形状に形成されていたとしても、かしめ時に第二内輪部材９２の変形を防止し、所定量の予圧および内部すき間を確保することができる。
【００５６】
外輪部材８２および内輪部材９０を管状あるいは平板状等の素材を用いて冷間鍛造で製造することにより、転がり軸受装置８０が軽量化されること、製造コストが低減されることは、上記各実施形態と同様である。
【００５７】
【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、第一内輪部材の端面に第二内輪部材の端部をかしめる際に、リブによって第二内輪部材の変形を防止することができる。
【図面の簡単な説明】
【図１】本発明の第一の実施形態を示す転がり軸受装置の側面断面図である。
【図２】同じく図１におけるＡ−Ａ線断面図である。
【図３】同じく製造工程の一部を示す断面図である。
【図４】本発明の第二の実施形態を示す転がり軸受装置の側面断面図である。
【図５】本発明の第三の実施形態を示す転がり軸受装置の側面断面図である。
【図６】従来の転がり軸受装置の製造工程の一部を示す断面図である。
【符号の説明】
１　　　　　転がり軸受装置
２　　　　　外輪部材
３，４　　　玉
５　　　　　内輪部材
９　　　　　第一内輪部材
１０　　　　第二内輪部材
１２　　　　ハブフランジ
１５　　　　大径部
１６　　　　小径部
１７　　　　中径部
２０　　　　中心穴
２２，２３　円筒状周壁面
２４　　　　円錐状周壁面
２６　　　　かしめ部
２７　　　　リブ
２８　　　　案内部材
３０　　　　円筒状嵌込部
３１　　　　平板部
３２　　　　案内部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a rolling bearing device for a vehicle, for example.
[0002]
[Prior art]
Conventional rolling bearing devices for vehicles include an outer ring member that is non-rotatably supported on the vehicle body side, a hub shaft rotatably supported on the outer ring member around an axis via double-row balls, and There is a hub shaft provided with a tubular member fitted to a portion corresponding to a vehicle inner side of a hub shaft (for example, see Patent Document 1).
[0003]
Hereinafter, the configuration of the conventional rolling bearing device 110 for a vehicle will be described with reference to FIG. FIG. 6 shows a state in which the rolling bearing device 110 is being manufactured. In the figure, reference numeral 111 denotes a cylindrical outer ring member, and the outer ring member 111 is formed with a mounting flange 112 which protrudes radially outward in the axial direction of the outer peripheral surface. Reference numeral 113 denotes two rows of balls spaced apart in the axial direction, and the balls 113 in each row are held at equal circumferential positions by a holder 115.
[0004]
Reference numeral 116 denotes a hub shaft. The hub axle 116 is formed in a solid cross section, and is disposed radially inward of the outer race member 111 and extends along one axial direction, a hub flange 118 protruding radially outward, and a brake disk. And a guide portion 119 along the other axial direction for guiding when mounting the tire wheel on the hub flange 118 in an overlapping manner, are integrally formed by hot forging. An inner raceway surface of the ball 113 is formed on the inner peripheral surface of the outer race member 111.
[0005]
An annular concave portion 120 is formed on the outer peripheral surface of one end of the shaft portion 117 in the axial direction, and the cylindrical member 121 is fitted into the annular concave portion 120. The inner raceway surface of the ball 113 is formed on the outer peripheral surface of the shaft portion 117 and the outer peripheral surface of the cylindrical member 121, respectively.
[0006]
Such a rolling bearing device 110 is placed on a caulking jig 114, and is caulked on an end surface of the cylindrical member 121 using a caulking jig 122 so as to expand one axial end of the shaft portion 117. Thus, the hub shaft 116 and the cylindrical member 121 are integrally rotated, and a predetermined amount of preload is applied.
[0007]
[Patent Document 1]
JP-A-2001-162338 (page 4, FIG. 2)
[0008]
[Problems to be solved by the invention]
In the above-described conventional rolling bearing device 110 for a vehicle, the hub axle 116 has a solid cross section, and has a shaft portion 117 extending in one axial direction, a hub flange 118 projecting radially outward, and a hub extending along the other axial direction. The guide part 119 is formed by hot forging. In order to manufacture such a member having portions along three different directions by hot forging, an expensive and large-scale apparatus such as a press machine for applying a large pressure is required. In addition, hot forging makes it difficult to ensure product accuracy, so that many post-processing operations such as turning and polishing are required, and the number of steps is increased, and the manufacturing cost is increased.
[0009]
Therefore, by manufacturing the guide portion 119 separately from the hub shaft 117, the hub shaft 117 is constituted by the hub flange 118 and the shaft portion 117 having the inner raceway surface of the one row of balls 113, thereby reducing the manufacturing cost. It is conceivable to reduce it. However, in this case, it may be necessary to devise a portion corresponding to swaging.
[0010]
[Means for Solving the Problems]
A rolling bearing device according to the present invention includes an outer ring member, an inner ring member disposed concentrically with the outer ring member radially inward of the outer ring member, an outer raceway surface formed on an inner peripheral surface of the outer ring member, and an inner ring member. A plurality of rows of rolling elements arranged to be able to roll freely between an inner ring raceway surface formed on an outer peripheral surface of the inner ring member, and the inner ring member includes a first inner ring member arranged on one axial side, A second inner ring member having a cylindrical portion joined in the axial direction to the first inner ring member, and the second inner ring member is inserted into an insertion hole formed at the center of the first inner ring member, One end in the axial direction is caulked to one end surface in the axial direction of the first inner race member so as to increase in diameter, and a plurality of ribs are provided on the other side of the inner peripheral surface of the second inner race member.
[0011]
In the above configuration, when the second inner ring member is inserted into the insertion hole of the first inner ring member and swaged to the one axial end surface of the first inner ring member so as to expand the one axial end, the swaging is performed. Since a part of the force is borne by the plurality of ribs formed on the other side of the inner peripheral surface of the second inner ring member, the second inner ring member is prevented from being deformed by buckling at the time of caulking, and a necessary internal clearance is provided. Is secured.
[0012]
Further, according to the configuration in which at least the second inner ring member of the first inner ring member and the second inner ring member is formed by cold forging, the manufacture of the rolling bearing device becomes easy, and the manufacturing cost is reduced.
[0013]
Further, any one of the outer ring member and the inner ring member is provided with a flange that protrudes radially outward, and a guide member that guides when the brake disc and the tire wheel are overlaid and mounted on the flange is the inner ring member and It is provided separately from the outer ring member.
[0014]
As described above, the configuration in which the guide member is formed separately from the inner ring member and the outer ring member simplifies the configuration of the outer ring member or the inner ring member that becomes the rotating ring, so that the manufacturing becomes easy and the manufacturing cost becomes higher. Is reduced.
[0015]
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. (First embodiment)
A first embodiment of the present invention will be described with reference to FIGS. The drawing shows a case where the rolling bearing device is of an inner ring rotating type and is used on a driven wheel side of a vehicle. FIG. 1 is a cross-sectional view showing an entire configuration of a rolling bearing device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA of FIG. 1, and FIG.
[0016]
As shown in FIG. 1, the rolling bearing device 1 in this embodiment has an outer ring member 2, two rows of balls 3 and 4 as rolling elements, and an inner ring member 5. The outer ring member 2 is formed by hot forging. The outer race member 2 has two rows of outer raceway surfaces 6a and 6b at positions axially separated from the inner peripheral surface thereof. The outer ring member 2 is formed with a support flange 7 projecting radially outward at a position in the axial direction. By attaching the support flange 7 to a knuckle incorporated into the vehicle body (not shown), the outer ring member 2 is supported non-rotatably around the axis with respect to the vehicle body.
[0017]
A cover 8 is fitted to the end of the outer race member 2 on the vehicle inner side. The cover 8 is for securing a space for installing a vehicle speed sensor (not shown). The balls 3 and 4 in each row are held at equal circumferential positions by crowned cages 3a and 4a, respectively.
[0018]
The inner ring member 5 includes a first inner ring member 9 and a second inner ring member 10 which are respectively arranged concentrically with the outer ring member 2. The first inner ring member 9 is formed by hot forging carbon steel (for example, JIS standard S55C). The first inner race member 9 has a tubular portion 11 having an outer raceway surface formed with an inner raceway surface 9a of one row of balls 3 corresponding to one outer raceway surface 6a in a radial direction, and a vehicle having the tubular portion 11. A hub flange 12 is formed on the outer side, that is, on the outer peripheral surface at one end in the axial direction, so as to protrude radially outward.
[0019]
The hub flange 12 has a brake disc 13 and a tire wheel 14 mounted thereon in an overlapping manner. As described above, the first inner ring member 9 is formed integrally with the cylindrical portion 11 along one axial side and the hub flange 12 along the radial direction.
[0020]
The second inner ring member 10 is formed integrally from a tubular, ring-shaped, or flat plate-shaped material (for example, JIS standard S55C) by cold forging. The second inner ring member 10 is entirely formed in a hollow cylindrical shape, and has an annular large-diameter portion 15 formed on the vehicle inner side, that is, an end on the other axial side, and a cylindrical small-diameter portion on the vehicle outer side. 16, a large diameter portion 15 and a small diameter portion 16 formed at an intermediate portion thereof so as to be continuous, and a medium diameter portion 17 having a diameter between the diameter of the large diameter portion 15 and the diameter of the small diameter portion 16. And is formed from
[0021]
The outer peripheral continuation surface portion of the large diameter portion 15 and the intermediate diameter portion 17 is an inner raceway surface 10a of the ball 4 in the other row radially corresponding to the other outer raceway surface 6b. A continuous surface (outer peripheral surface) of the middle diameter portion 17 and the small diameter portion 16 in the second inner ring member 10 is reduced in diameter inward in the radial direction and is brought into contact with the contact surface 18 of the first inner ring member 9 in the axial direction. The contact surface 19 is provided.
[0022]
In the axially penetrating center hole 20 formed at the radial center portion of the second inner ring member 10, the peripheral wall surface has a cylindrical peripheral wall surface 22 forming a large-diameter central hole 20 a on the vehicle inner side, and a vehicle outer wall. The cylindrical peripheral wall surface 23 that forms the small-diameter center hole 20b on the side, and the conical peripheral wall surface 24 that continues the cylindrical peripheral wall surfaces 22 and 23 at corresponding positions radially inward of the contact surfaces 18 and 19, respectively. Is formed. The large-diameter end 24a of the conical peripheral wall 24 is positioned closer to the vehicle inner side than the contact surfaces 18 and 19.
[0023]
The small-diameter portion 16 of the second inner ring member 10 is inserted into an insertion hole 25 formed at the center of the first inner ring member 9, and the end of the first inner ring member 9 is expanded so that the vehicle outer-side end thereof expands in diameter. A caulked portion 26 is formed by caulking the end face 12a of the hub flange 12 on the vehicle outer side.
[0024]
A plurality of ribs 27 extending in the axial direction are integrally formed on the cylindrical peripheral wall surface 22 of the second inner ring member 10 at circumferentially equal positions. These ribs 27 are formed in a spline shape. One end of each rib 27 is located in the middle of the conical peripheral wall surface 24, and the other end extends to the vehicle inner side end of the cylindrical peripheral wall surface 22. Have been. As shown in FIG. 2, the virtual circle diameter D <b> 1 formed by connecting the inner diameters of the respective ribs 27 is formed to have a larger diameter than the cylindrical peripheral wall surface 23 and a smaller diameter than the cylindrical peripheral wall surface 22.
[0025]
A guide member (also referred to as a spigot member) 28 separate from the inner race member 5 is provided for guiding the brake disc 13 and the tire wheel 14 when they are mounted so as to overlap the hub flange 12. The guide member 28 is integrally formed from a plate-shaped material (for example, JIS standard S55C) by cold forging.
[0026]
The guide member 28 is formed at the center in the radial direction and has a bottomed cylindrical fitting portion 30 that is press-fitted into the small-diameter center hole 20 b (the cylindrical peripheral wall surface 23) of the first inner ring member 9. A flat plate portion 31 whose diameter is increased radially outward from an end of the insertion portion 30; and an annular guide portion 32 which is bent from the radially outer end of the flat plate portion 31 toward the vehicle inner side. Then, it is provided so as to cover the caulked portion 26. The outer peripheral surface of the guide portion 32 is a portion that guides the peripheral surfaces of the central holes 13a and 14a formed in the brake disc 13 and the tire wheel 14, respectively.
[0027]
Further, the rolling bearing device 1 has a sealing device 33 for sealing the annular space between the outer ring member 2 and the inner ring member 5 on the vehicle outer side. The seal device 33 is a resilient seal body having a metal core fitted to the inner peripheral surface of the vehicle outer end of the outer race member 2 and a lip attached to the metal core and in contact with a facing portion of the first inner race member 9. It is composed of
[0028]
Reference numeral 35 in the figure indicates a hub bolt. The hub bolt 35 is press-fit into the insertion hole 12b at a predetermined position in the circumferential direction of the hub flange 12. The brake disc 13 and the tire wheel 14 are arranged with respect to the hub flange 12 such that the center holes 13a and 14a are respectively along the guide portions 32 of the guide member 28 and the hub bolts 35 are inserted into the holes 13b and 14b on the board surface. Are superimposed as shown by the imaginary line in the figure. The brake disc 13 and the tire wheel 14 are fixed to the hub flange 12 by screwing a nut member (not shown) to the hub bolt 35.
[0029]
A manufacturing procedure of the rolling bearing device 1 having the above configuration will be described. First, in a state where the balls 3, 4 in each row are held on the outer ring member 2 by the crown retainers 3a, 4a, the balls 3, 4 in each row are assembled so as to fit on the outer ring raceway surfaces 6a, 6b. wear. Subsequently, as shown in FIG. 3, the vehicle inner side is turned down beforehand on the columnar convex portion 37 (having the same diameter as the vehicle outer side opening of the outer ring member 2) of the caulking receiving jig 36. The outer ring member 2 in which the balls 3 and 4 of the above-described respective rows are assembled so as to be fitted to the second inner ring member 10 placed thereon.
[0030]
Then, the first inner ring member 9 is assembled from above so that the inner ring raceway surface 9a of the cylindrical portion 11 is fitted to the one row of balls 3. With this configuration, the cylindrical portion to be swaged (indicated by the phantom line) 10b of the second inner race member 10 projects upward from the vehicle outer side end surface 12a of the hub flange 12 of the first inner race member 9. Become.
[0031]
Here, the tip 39 of the caulking jig 38 is inserted into the small-diameter center hole 20b of the second inner ring member 10 and the caulking jig 38 is rolled while applying a predetermined caulking force, thereby expanding the caulking scheduled portion 10b. The caulking portion 26 is formed by pressing the hub flange 12 on the vehicle outer side end surface so as to have a diameter. This provides a predetermined amount of preload and a predetermined amount of internal clearance.
[0032]
Incidentally, the second inner ring member 10 is formed in a cylindrical shape having different inner diameters. For this reason, when the load acts in the axial direction at the time of caulking, the second inner ring member 10 is likely to be deformed due to buckling, and it may be difficult to secure a predetermined internal clearance.
[0033]
However, in this embodiment, the large-diameter portion 15 and the medium-diameter portion 17 of the second inner race member 10 have one end located in the middle of the conical peripheral wall surface 24 and the other end located in the large-diameter center hole. A plurality of ribs 27 extending up to the cylindrical peripheral wall surface 22 forming 21 are formed integrally at equal positions in the circumferential direction. For this reason, at the time of caulking, a part of the load is supported by these ribs 27. Thereby, even if the second inner ring member 10 is formed in a thin cylindrical shape having a different inner diameter, the second inner ring member 10 is prevented from being deformed at the time of caulking, and a predetermined (required) preload and internal clearance are required. Can be secured.
[0034]
In the rolling bearing device 1 manufactured as described above, when the vehicle travels, the inner ring member 5, that is, the first inner ring member 9 and the second inner ring member 10 rotate around the axis with the rotation of the wheels (not shown).
[0035]
Since the second inner ring member 10 is formed in a hollow cylindrical shape by using a material such as a tube, the weight can be reduced as compared with a case where the second inner ring member 10 is formed in a solid cross section, and the vehicle weight can be reduced (particularly, unsprung). Weight reduction). In addition, the second inner ring member 10 can be formed with higher precision than in the case where the second inner ring member is formed by hot forging as in the related art.
[0036]
That is, in the case of hot forging, the surface accuracy of the product is low, and in particular, the polishing time for making the inner raceway surface 10a of the ball 4 necessary accuracy is long, and in some cases, a portion other than the inner raceway surface 10a is also polished. Processing may be required. On the other hand, when the second inner race member 10 is formed by cold forging using a material such as a tube, the accuracy of the product is good, and the polishing processing time for obtaining the required accuracy of the inner raceway surface 10a is required. It can be shortened, and almost no polishing is required for portions other than the inner raceway surface 10a. As a result, manufacturing costs can be reduced.
[0037]
Further, since the first inner ring member 9 is formed from a cylindrical portion 11 extending along one side in the axial direction and a hub flange 12 extending along the radial direction, the first inner ring member 9 projects in three directions as in the related art. As compared with a case where the hub shaft is formed by hot forging, even a small-scale device can be used, and the manufacturing cost can be further reduced.
(Second embodiment)
FIG. 4 is a cross-sectional view illustrating the entire configuration of the rolling bearing device according to the second embodiment. The rolling bearing device 50 in this embodiment is also an inner ring rotating type, as in the first embodiment.
[0038]
In this embodiment, the outer race member 51 is integrally formed from a tubular or flat material by cold forging. The outer ring member 51 is formed from a cylindrical body 53 and a support flange 52 attached to the vehicle body. The support flange 52 is formed from the vehicle inner end of the body 53, that is, from one axial end. It is formed so as to protrude radially outward. Outer ring raceway surfaces 53a, 53b of both rows of balls 54, 55 are formed on the inner peripheral surface of the body 53.
[0039]
The inner ring member 56 includes a first inner ring member 57 and a second inner ring member 58. The second inner ring member 58 is integrally formed by cold forging from a material such as a tube or a flat plate, and includes a cylindrical portion 59 disposed radially inward of the outer ring member 51, A hub flange 60 is formed at the vehicle outer end 59, that is, at the other axial end, so as to protrude radially outward.
[0040]
The cylindrical portion 59 is formed of a large-diameter portion 61 on the vehicle outer side and a small-diameter portion 62 on the vehicle inner side. In the middle of the outer peripheral surface of the large diameter portion 61, an inner raceway surface 61a of the ball 55 in the other row is formed. A cylindrical first inner ring member 57 is fitted to the small diameter portion 62. The outer peripheral surface of the large-diameter portion 61 and the outer peripheral surface of the small-diameter portion 62 are continued by a contact surface 63 whose diameter is reduced inward in the radial direction from the outer peripheral surface of the large-diameter portion 61. The first inner race member 57 is a surface that axially contacts the contact surface 64 that is the vehicle outer end surface.
[0041]
The inner end of the second inner race member 58 on the vehicle inner side is radially outwardly expanded, so that the inner end of the first inner race member 57 is caulked on the inner end surface of the inner race member 57 to form a swaged portion 65. The cylindrical peripheral wall surface 66 of the large diameter portion 61 and the cylindrical peripheral wall surface 67 of the small diameter portion 62 in the cylindrical portion 59 are connected by a conical peripheral wall surface 68. The vehicle outer side end portion 68a of the conical peripheral wall surface 68 is located closer to the vehicle outer side than the contact surfaces 63 and 64.
[0042]
A plurality of ribs 70 extending in the axial direction are integrally formed on the cylindrical peripheral wall surface 66 forming the large-diameter center hole 69 of the second inner ring member 58 at circumferentially equal positions. These ribs 70 are formed in a spline shape, and the other end of each rib 70 is located in the middle of the cylindrical peripheral wall surface 66 in the axial direction, and the one end is located in the middle of the conical peripheral wall surface 68. ing. The imaginary circular diameter formed by connecting the inner diameters of the ribs 70 is smaller than the cylindrical peripheral wall surface 66 that forms the large-diameter central hole 69 of the large-diameter portion 61, and the cylindrical circumference that forms the small-diameter central hole 71 of the small-diameter portion 62. The diameter is formed larger than the wall surface 67.
[0043]
The rolling bearing device 50 is provided with a guide member 72 separate from the inner ring member 56. The guide member 72 is formed by cold forging from a tubular or flat material. The guide member 72 is integrally formed of a fitting portion 74 fitted to the cylindrical peripheral wall surface 66 and having the vehicle inner side opened, and a bottomed cylindrical guide portion 75 projecting from the hub flange 60 to the vehicle outer side. Is formed. The fitting portion 74 is inserted into the cylindrical peripheral wall surface 66 up to near the other end of the rib 70.
[0044]
The rolling bearing device 50 includes a bottomed cover 76 that covers an opening on the vehicle inner side of the outer ring member 51, and a fitting portion 73 of the cover 76 fits on a peripheral surface of the opening on the vehicle inner side of the outer ring member 51. Have been.
[0045]
A pulsar ring 77 as a rotation signal transmitting member is fixed to the bottom surface of the guide member 72. The detector 78 that detects the rotation state (for example, the number of rotations) of the inner ring member 56 based on a signal from the pulsar ring 77 is inserted into the inner space 72 a of the guide member 72 and the center holes 69 and 71 of the second inner ring member 58. It is used as a space to be used. Reference numerals 13 and 14 indicate a brake disk and a tire wheel, respectively. Reference numeral 33 denotes a sealing device having the same configuration as in the first embodiment, and reference numeral 35 denotes a hub bolt.
[0046]
In the rolling bearing device 50 having the above-described configuration, when the caulking portion 65 is formed by disposing the vehicle outer side below, the shaft is formed on the cylindrical peripheral wall surface 66 of the second inner ring member 58 that forms the large-diameter center hole 69. Since a plurality of ribs 70 along the direction are formed integrally at equal positions in the circumferential direction, a part of the load at the time of caulking is supported by these ribs 70. Thereby, even if the second inner ring member 58 is formed in a cylindrical shape having a different inner diameter, deformation of the second inner ring member 58 during crimping can be prevented, and a predetermined amount of preload and an internal gap can be secured. .
[0047]
By manufacturing the outer race member 51 and the inner race member 56 by cold forging using a tubular or flat material, it is possible to reduce the weight of the rolling bearing device 50 and reduce the manufacturing cost. This is the same as the embodiment.
(Third embodiment)
Although the rolling bearing devices 1 and 50 in the first and second embodiments are of the inner ring rotating type, the rolling bearing device 80 in the third embodiment is of the outer ring rotating type.
[0048]
In this embodiment, the outer ring member 81 is formed from a tubular body 82 and a hub flange 84 formed so as to protrude radially outward at an end of the body 82 on the vehicle outer side. And is integrally formed by cold forging. Outer raceway surfaces 82a, 82b of both rows of balls 85, 86 are formed on the inner peripheral surface of the body portion 82.
[0049]
The rolling bearing device 80 has a guide member 87 that covers the vehicle outer side opening of the outer ring member 81. The guide member 87 is formed by cold forging using a tubular or flat material. The guide member 87 is fitted to the inner peripheral wall of the outer ring member 81 on the vehicle outer side and has a fitting portion 88 with the vehicle inner side opened, and a bottomed cylindrical guide portion protruding from the hub flange 84 toward the vehicle outer side. 89 and is integrally formed.
[0050]
The inner ring member 90 includes a first inner ring member 91 and a second inner ring member 92. The first inner ring member 91 is formed in a cylindrical shape, and the inner ring raceway surface 91a of the one row of balls 85 is formed on the outer peripheral surface thereof. The second inner ring member 92 is formed by cold forging a material such as a tube or a flat plate. The second inner ring member 92 has a cylindrical body portion 83 and a radially outward portion from the vehicle inner side end of the body portion 83. And a mounting flange 93 formed so as to protrude therefrom. By attaching the attachment flange 93 to the vehicle body, the inner ring member 90 is supported non-rotatably about the axis.
[0051]
The body portion 83 is formed integrally with a small-diameter portion 94 on the vehicle outer side and a large-diameter portion 95 on the vehicle inner side. The first inner ring member 91 is externally fitted to the small diameter portion 94, and the vehicle outer side end of the small diameter portion 94, that is, the one end in the axial direction is enlarged, so that the vehicle inner outer member 91 of the first inner ring member 91 is enlarged. A caulked portion 96 is formed by caulking the side end surface.
[0052]
A plurality of ribs 100 extending in the axial direction are integrally formed on the cylindrical peripheral wall surface 98 forming the large diameter center hole 97 of the large diameter portion 95 at equal circumferential positions. These ribs 100 are formed in a spline shape, and one end of each rib 100 has a cylindrical peripheral wall surface 99 forming a small-diameter center hole 99a of the small-diameter portion 94 and a conical shape that is continuous with the cylindrical peripheral wall surface 98. It is located in the middle of the peripheral wall 102. The virtual circle diameter formed by connecting the inner diameters of the respective ribs 100 is smaller than the cylindrical peripheral wall surface 98 and larger than the cylindrical peripheral wall surface 99a.
[0053]
A pulsar ring 77 as a rotation signal transmitting member is fixed to the bottom surface of the guide member 87. The internal space 87a of the guide member 87 is used as a space into which a detector 78 for detecting the rotation state (for example, the number of rotations) of the inner ring member 90 based on a signal from the pulsar ring 77 is inserted. , Are fitted and supported on the cylindrical peripheral wall surface 99 of the small diameter portion 94.
[0054]
Reference numerals 13 and 14 indicate a brake disk and a tire wheel, respectively. Reference numeral 33 denotes a sealing device having the same configuration as in the first embodiment, and reference numeral 35 denotes a hub bolt.
[0055]
In the rolling bearing device 80 having the above-described configuration, when the caulking portion 96 is formed by disposing the vehicle inner side downward, the cylindrical peripheral wall surface 98 that forms the large-diameter center hole 97 of the second inner ring member 92 has an axial direction. Are formed integrally at equal positions in the circumferential direction, and a part of the load at the time of caulking is supported by these ribs 100. Thereby, even if the second inner ring member 92 is formed in a thin cylindrical shape having a different inner diameter, it is possible to prevent the deformation of the second inner ring member 92 at the time of caulking and to secure a predetermined amount of preload and an internal clearance. Can be.
[0056]
By manufacturing the outer race member 82 and the inner race member 90 by cold forging using a tubular or flat material, the rolling bearing device 80 can be reduced in weight and the manufacturing cost can be reduced. Same as the form.
[0057]
【The invention's effect】
As is apparent from the above description, according to the present invention, the deformation of the second inner race member can be prevented by the rib when the end of the second inner race member is caulked to the end surface of the first inner race member.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a rolling bearing device according to a first embodiment of the present invention.
FIG. 2 is a sectional view taken along line AA in FIG.
FIG. 3 is a cross-sectional view showing a part of the manufacturing process.
FIG. 4 is a side sectional view of a rolling bearing device according to a second embodiment of the present invention.
FIG. 5 is a side sectional view of a rolling bearing device according to a third embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a part of a manufacturing process of a conventional rolling bearing device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rolling bearing device 2 Outer ring member 3, 4 Ball 5 Inner ring member 9 First inner ring member 10 Second inner ring member 12 Hub flange 15 Large diameter portion 16 Small diameter portion 17 Medium diameter portion 20 Center holes 22, 23 Cylindrical peripheral wall surface 24 Conical Peripheral wall surface 26 caulked portion 27 rib 28 guide member 30 cylindrical fitting portion 31 flat plate portion 32 guide portion

Claims (3)

外輪部材と、この外輪部材の径方向内方で外輪部材と同心に配置された内輪部材と、前記外輪部材の内周面に形成された外輪軌道面と内輪部材の外周面に形成された内輪軌道面との間に転動自在に配置される複数列の転動体とを含み、
前記内輪部材は、軸方向一方側に配置される第一内輪部材と、この第一内輪部材に軸方向で接合される筒状部を有する第二内輪部材とから構成され、前記第一内輪部材の中心に形成された挿通穴に前記第二内輪部材が挿通されるとともに、その軸方向一方側端部が拡径するように第一内輪部材の軸方向一方側端面にかしめられ、前記第二内輪部材の内周面他方側に複数個のリブが設けられた、ことを特徴とする転がり軸受装置。An outer ring member, an inner ring member concentrically arranged with the outer ring member radially inward of the outer ring member, an outer ring raceway surface formed on an inner peripheral surface of the outer ring member, and an inner ring formed on an outer peripheral surface of the inner ring member A plurality of rows of rolling elements that are arranged to be able to roll freely between the raceway surface,
The inner ring member includes a first inner ring member disposed on one side in the axial direction, and a second inner ring member having a cylindrical portion joined to the first inner ring member in the axial direction, and the first inner ring member The second inner race member is inserted through an insertion hole formed at the center of the first inner race member, and the second inner race member is caulked to one axial end surface of the first inner race member so that one axial end portion of the second inner race member expands in diameter. A rolling bearing device, wherein a plurality of ribs are provided on the other side of the inner peripheral surface of the inner ring member. 請求項１に記載の転がり軸受装置であって、
前記第一内輪部材および第二内輪部材のうち、少なくとも第二内輪部材が冷間鍛造によって形成された、ことを特徴とする転がり軸受装置。The rolling bearing device according to claim 1,
A rolling bearing device, wherein at least a second inner ring member of the first inner ring member and the second inner ring member is formed by cold forging. 請求項１または請求項２に記載の転がり軸受装置において、
前記外輪部材または内輪部材のうち何れかに、径方向外方に突出するフランジが設けられ、このフランジにブレーキディスクおよびタイヤホイールを重ねて取付ける際に案内する案内部材が、前記内輪部材および外輪部材とは別体に設けられた、ことを特徴とする転がり軸受装置。The rolling bearing device according to claim 1 or 2,
Either the outer ring member or the inner ring member is provided with a radially outwardly projecting flange, and the guide member that guides the brake disk and the tire wheel when overlapping and mounting the flange is provided on the inner ring member and the outer ring member. A rolling bearing device provided separately from the above.
JP2002309181A 2002-10-24 2002-10-24 Rolling bearing device Expired - Fee Related JP4078945B2 (en)

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JP2008018767A (en) * 2006-07-11 2008-01-31 Ntn Corp Drive shaft assembly
US8083598B2 (en) 2006-07-11 2011-12-27 Ntn Corporation Bearing device for wheel
CN104389885A (en) * 2014-10-31 2015-03-04 重庆戴卡捷力轮毂制造有限公司 Bolt hole protecting plug

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