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JP2004036818A - Bearing device - Google Patents

Bearing device Download PDF

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Publication number
JP2004036818A
JP2004036818A JP2002197074A JP2002197074A JP2004036818A JP 2004036818 A JP2004036818 A JP 2004036818A JP 2002197074 A JP2002197074 A JP 2002197074A JP 2002197074 A JP2002197074 A JP 2002197074A JP 2004036818 A JP2004036818 A JP 2004036818A
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JP
Japan
Prior art keywords
outer ring
mounting
bolt hole
bearing device
outer peripheral
Prior art date
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.)
Granted
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JP2002197074A
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Japanese (ja)
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JP4239495B2 (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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Publication date
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Priority to JP2002197074A priority Critical patent/JP4239495B2/en
Publication of JP2004036818A publication Critical patent/JP2004036818A/en
Application granted granted Critical
Publication of JP4239495B2 publication Critical patent/JP4239495B2/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
    • 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
    • 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
    • F16C19/185—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 two raceways provided integrally on a part other than a race ring, e.g. a shaft or housing
    • 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
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • 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 minimize the increase of weight while increasing the strength of a mounting part to other members, and to suppress a rise in manufacturing cost. <P>SOLUTION: This bearing device is provided with an outer ring 1 and an inner ring 2 rotatably supported to the outer ring 1 through a rolling element 7. A plurality of mounting parts 3 projecting radially outward and having bolt holes 6 into which fixing bolts are inserted, are formed in a circumferentially aligned manner at the outer peripheral part of the outer ring 1. The back face of each mounting part 3 is provided with a reinforcing part 4 for supporting the mounting part 3 to the outer peripheral part of the outer ring 1 in the form of avoiding the portion of the bolt hole 3. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、軸受装置に関する。
【０００２】
【従来の技術】
一般的に、自動車などの車輪を支持する軸受装置には、内輪回転型のものと、外輪回転型のものとがある。
【０００３】
内輪回転型の軸受装置では、固定輪である外輪の外周部に取り付け用フランジが形成され、このフランジの円周数ヶ所にボルト孔が穿設される。フランジは、ボルト孔に挿入されるボルトにより、車体側の部材であるナックルやキャリアに取り付け固定される。
【０００４】
【発明が解決しようとする課題】
上記の軸受装置には、アキシアル方向にも大きな荷重がかかる。その荷重は、外輪の外周にあるフランジから、これに取り付けられたナックル等の部材を引き剥がすように作用したり、フランジをナックル等の部材に強く押し付けるように作用する。したがって、フランジには、前記のアキシヤル方向の荷重に耐えうる充分な強度をもたせる必要がある。
【０００５】
この要請に対しては、フランジ自体の厚みを厚くすることが考えられるが、そうすると、フランジの強度は増すものの、重量が増える。この点は、軸受装置の軽量化を図る上で好ましくない。
【０００６】
また、製造面では、分厚くなったフランジに対して、タップ孔加工によりボルト孔を形成することになるので、ボルト孔の加工コストが高くなる、という問題もある。
【０００７】
【課題を解決するための手段】
本発明の軸受装置は、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を備え、前記外輪の外周部に、径方向外方に突出し軸方向一方側に取り付け面を有する取り付け部が複数個円周方向に形成され、前記各取り付け部には、固定用ボルトが挿入されるボルト孔が設けられ、前記各取り付け部の前記取り付け面とは反対側の面で、少なくとも前記ボルト孔の部分を除くいずれかの位置に、前記外輪の外周部に対して前記取り付け部を支える補強部が設けられている構成としたものである。
【０００８】
上記の軸受装置において、各取り付け部は、その背面側、すなわち取り付け面とは反対側の面に補強部があるから、外部からの荷重、特にアキシアル荷重に対して充分に大きな強度を発揮する。この場合、補強部の付加で重量が増加するが、その重量増加の割合は、補強部を付加したことによる強度増加の割合より少ないから、重量増加は、問題とはならない程度に抑えられる。
【０００９】
また、取り付け部のボルト孔部分の厚みは、特に分厚くする必要がないので、ボルト孔の加工コストの上昇を招来しない。
【００１０】
前記の補強部は、取り付け部の背面に、ボルト孔部分を避ける形で設けられていればよく、その形状は特に限定されない。補強部が、ボルト孔の両側位置から外輪の外周部にかけて設けられたリブである場合、そのリブは、取り付け部の背面を外輪の外周面に対して突っ張るように支えることになるから、補強効果が大で、しかも重量増加は少なくて済む。
【００１１】
【発明の実施の形態】
〔第１実施形態〕
図１ないし図５は本発明の第１実施形態を示している。ここでは、自動車の駆動輪側に用いられる軸受装置を例に挙げる。
【００１２】
図１は、第１実施形態に係る軸受装置の全体の外観を示し、図２は、前記軸受装置の半部の背面形状を示し、図３ないし図５は、前記軸受装置の互いに異なる断面位置での断面形状を示している。これらの図において、符号１は外輪、２は内輪、３は取り付け部、４は、取り付け部３の補強部、５は、取り付け部３，３間の架橋部である。
【００１３】
前記の外輪１と内輪２とは、その間に設けられる玉と保持器とともに複列外向きアンギュラ玉軸受を構成しているが、その内部の構成については、後に説明する。
【００１４】
取り付け部３は、ナックル等の車体側の部材を取り付けるためのもので、外輪１の外周部に円周方向等間隔に複数個（図示のものでは、５個）形成されている。この取り付け部３は、径方向外方に板状に突出しており、軸方向一方側に取り付け面３ａを有し、この取り付け面３ａと直交する形で、固定用ボルトが挿入されるボルト孔６が穿設されている。
【００１５】
補強部４は、外輪１の外周部に対して取り付け部３を支えるもので、各取り付け部３の背面側、すなわち、取り付け面３ａとは反対側に、ボルト孔６を避ける形で設けられている。この実施形態において、補強部４はリブで、ボルト孔６の両側位置から外輪１の外周部にかけて取り付け面３ａの反対側面から軸方向に突出した形で設けられている。
【００１６】
架橋部５は、円周方向に互いに隣り合う取り付け部３，３の間にあって、取り付け部３，３どうしを結合するものである。この架橋部５は、この実施形態では、図４および図５に明示するように、その厚みＥが取り付け部３の厚みＤとほぼ同一で、径方向外方への突出高さｈは、取り付け部３の突出高さＨより低く設定されている。
【００１７】
前記の外輪１と内輪２とは、図４および図５に示すように、内外両輪１，２間にある玉７と冠形保持器８とともに複列外向きアンギュラ玉軸受９を構成している。
【００１８】
すなわち、外輪１には２列の軌道溝が形成されている。内輪２は２個一組で、それぞれに１列の軌道溝を有する。これら内外輪１，２間には、二列に配設される複数の玉７，７…と、二つの冠形保持器８，８が設けられている。なお、符号１０は、内外輪１，２間の軸端に設けられたシールである。
【００１９】
上記構成の軸受装置を自動車のホイール用軸受装置として使用する場合、取り付け部３の取り付け面３ａには、車体側の部材であるナックルもしくはキャリアが当てがわれ、このナックル等と取り付け部３とは、取り付け部３のボルト孔６に挿入されるボルトにより、互いに結合固定される。
【００２０】
上記構成において、各取り付け部３は、架橋部５および他の取り付け部３と円環状に連なり、全体でフランジを形成することになるほか、背面側に補強部４があるから、この補強部４が取り付け部３の背面を外輪１の外周面に対して突っ張るように支えることになり、アキシアル荷重に対して充分に大きな強度を発揮する。
【００２１】
この場合、補強部４を付加することによる重量増加の割合は、補強部４を付加することによる強度増加の割合に比べると小さく、重量増加は、問題とはならない程度に抑えられる。
【００２２】
また、架橋部５の突出高さｈは、取り付け部３の突出高さＨより低いから、架橋部５の高さが減少している分、重量の削減が可能で、円周方向に一定高さのフランジを有するものに比べ、重量を低い値に抑えられる。
【００２３】
製造面では、取り付け部３のボルト孔６部分の厚みは、特に分厚くする必要がないので、ボルト孔６の加工コストは上昇しない。
【００２４】
前記したように、取り付け部３の背面側では、ボルト孔６を避ける形で補強部４が形成される。したがって、ボルト孔６部分が補強部４の不形成領域となる。補強部４の不形成領域の広さは、ボルト孔６に挿入される固定用ボルトの頭部や、このボルトに螺合するナットの座面に相当する広さであることが望ましいが、常にこの広さを必要とするものではない。例えば、取り付け部３にナックル等の部材を取り付ける際、部材側から取り付け部３のボルト孔６にボルトの先端部を挿入する取り付け方をするものでは、補強部４の不形成領域を、ボルトの頭部やナットの占める広さにする必要はなく、ボルト孔６の開口部のみを補強部４の不形成領域とすればよい。
【００２５】
〔第２実施形態〕
図６は、本発明の第２実施形態に係る軸受装置の軸方向に沿って断面した断面図である。
【００２６】
この第２実施形態においても、第１実施形態と同様に、外輪１の外周部には、ボルト孔６を有する取り付け部３と、外輪１の外周部に対して取り付け部３を支えるリブ形状の補強部４と、円周方向に互いに隣り合う取り付け部３，３どうしを結合する架橋部５とが設けられている。
【００２７】
この実施形態での架橋部５は、その突出高さｈが取り付け部３の突出高さＨより低く、かつその厚みｅが取り付け部３の厚みＤより薄く形成されている。その他の部分は、第１実施形態のものと変わりがないので、対応する部分には同一の符号を付して、その説明は省略する。
【００２８】
この構成では、架橋部５の厚みｅが薄い分、第１実施形態のものより、重量削減が可能で、軸受装置全体を軽量化する上で有益である。
【００２９】
取り付け部３が、アキシアル荷重に対して充分に大きな強度を有する点、ボルト孔６の加工コストが上昇しない点は、第１実施形態と同じである。
【００３０】
〔第３実施形態〕
図７は、本発明の第３実施形態に係る軸受装置の軸方向に沿って断面した断面図である。
【００３１】
この第３実施形態においては、外輪１の外周部に、ボルト孔６を有する取り付け部３と、外輪１の外周部に対して取り付け部３を支えるリブ形状の補強部４とが設けられているが、円周方向に互いに隣り合う取り付け部３，３どうしを結合する架橋部は省略されている。その他の部分は、第１実施形態のものと変わりがないので、対応する部分には同一の符号を付している。
【００３２】
この構成では、架橋部が省略されているため、第２実施形態のものより、さらに重量削減が可能である。なお、取り付け部３がその背面側の補強部４により、アキシアル荷重に対して充分に大きな強度を有すること、また、ボルト孔６の加工コストが上昇しないことは、第１実施形態と同じである。
【００３３】
〔第４実施形態〕
図８は、本発明の第４実施形態に係る軸受装置の軸方向に沿って断面した断面図である。
【００３４】
この第４実施形態においても、第１実施形態と同様に、外輪１の外周部には、ボルト孔６を有する取り付け部３と、外輪１の外周部に対して取り付け部３を支えるリブ形状の補強部４と、円周方向に互いに隣り合う取り付け部３，３どうしを結合する架橋部５とが設けられており、架橋部５は、その厚みが取り付け部３の厚みとほぼ同一で、径方向外方への突出高さは、取り付け部３より低い。
【００３５】
この実施形態では、外輪１を一部として含む複列外向きアンギュラ玉軸受９のほかに、中空形状のハブ軸１１を有している。
【００３６】
複列外向きアンギュラ玉軸受９は、２列の軌道溝を有する単一の外輪１と、２個一組でそれぞれに１列の軌道を有する内輪１２，１３と、二列で配設される複数の玉７，７…と、二つの冠形保持器８，８とを備えている。
【００３７】
ハブ軸１１は、その大径外周面が前記複列外向きアンギュラ玉軸受９の一方の内輪１２となっている。他方の内輪１３は、ハブ軸１１の小径外周面に外嵌されている。
【００３８】
上記ハブ軸１１の一方軸端寄り（図では、右端寄り）には、径方向外方に延びるフランジ１４が設けられている。このフランジ１４の円周数ヶ所には、貫通孔１５が設けられており、この貫通孔１５に対しボルト１６が軸方向外方へ突出する状態で圧入固定されている。なお、前記ボルト１６は、基部にセレーション１６ａを有し、それより先端側にねじ溝１６ｂを有する。
【００３９】
上記構成において、外輪１の取り付け部３が、車体側の部材であるナックル１７（またはキャリア）に対してボルト１８で非回転に取り付けられる。ハブ軸１１の内周にドライブシャフト１９がスプライン嵌合されてナット２０により一体的に結合される。また、ハブ軸１１のフランジ１４の外側面（図８における右側で、車両アウター側の面）と、ボルト１６に対して螺合されるナット２１とで、ディスクブレーキ装置のディスクロータ２２および車輪のホイール２３が挟持されて固定される。
【００４０】
〔その他の実施形態〕
補強部は、前記のようなリブ形状に限定されるものではなく、取り付け部３の背面で、少なくともボルト孔６部分とを除くいずれかの位置に、外輪１の外周部に対して取り付け部３を支えることができる形に設けられていればよい。
【００４１】
図９は、補強部の他の実施形態を示すものである。この実施形態の補強部４Ａは、ボルト孔６を囲む形に形成されている。この形状の補強部４Ａでは、図１や図２に示した補強部４より、補強強度が大となる。
【００４２】
本発明の軸受装置に主要部として含まれる軸受は、玉軸受にかぎらず、ころ軸受、円錐ころ軸受であってもよい。
【００４３】
本発明は、駆動輪の軸受装置としてばかりでなく、従動輪用の軸受装置とすることができる。また、本発明は、外輪側に固定の部材を取り付ける構造を有する他の軸受装置にも適用できる。
【００４４】
【発明の効果】
本発明によれば、ナックル等の車体側の部材に取り付けられる取り付け部は、その背面側にある補強部により補強されるから、外部からの荷重、特にアキシアル荷重に対して充分に大きな強度を発揮する。この場合、補強部の付加により重量が増加する割合は、補強部を付加したことによる強度増加の割合より少ないから、重量増加は、特に問題とはならない程度に抑えられる。
【００４５】
また、取り付け部のボルト孔部分の厚みは、特に分厚くする必要がないので、ボルト孔の加工コストの上昇を招来しない。
【００４６】
特に、補強部が、ボルト孔の両側位置から外輪の外周部にかけて設けられたリブである場合、そのリブは、取り付け部の背面を外輪の外周面に対して突っ張るように支えることになるから、補強効果が大で、しかも重量増加は少なくて済む。
【図面の簡単な説明】
【図１】本発明の一実施形態に係る軸受装置の外観斜視図。
【図２】図１の軸受装置の半部の背面図。
【図３】図２のイーイ線に沿った断面図。
【図４】図２のローロ線に沿った断面図。
【図５】図２のハーハ線に沿った断面図。
【図６】本発明の第２実施形態に係る軸受装置の軸方向に沿った断面図。
【図７】本発明の第３実施形態に係る軸受装置の軸方向に沿った断面図。
【図８】本発明の第４実施形態に係る軸受装置の軸方向に沿った断面図。
【図９】補強部の他の実施形態を示す図で、（Ａ）は補強部の背面図、（Ｂ）は、（Ａ）のニーニ線に沿った断面図である。
【符号の説明】
１　　　外輪
２　　　内輪
３　　　取り付け部
３ａ　　取り付け面
４　　　補強部
５　　　架橋部
６　　　ボルト孔
７　　　玉（転動体）[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bearing device.
[0002]
[Prior art]
Generally, there are two types of bearing devices that support wheels of an automobile or the like, such as an inner ring rotating type and an outer ring rotating type.
[0003]
In the inner ring rotating type bearing device, a mounting flange is formed on an outer peripheral portion of an outer ring which is a fixed ring, and bolt holes are formed in several places around the circumference of the flange. The flange is attached and fixed to a knuckle or carrier which is a member on the vehicle body side by a bolt inserted into the bolt hole.
[0004]
[Problems to be solved by the invention]
A large load is also applied to the bearing device in the axial direction. The load acts to peel off a member such as a knuckle attached to the flange on the outer periphery of the outer ring, or acts to strongly press the flange against the member such as the knuckle. Therefore, the flange needs to have sufficient strength to withstand the axial load.
[0005]
In response to this request, it is conceivable to increase the thickness of the flange itself, but this increases the strength of the flange but increases the weight. This is not preferable in reducing the weight of the bearing device.
[0006]
Further, in terms of manufacturing, since a bolt hole is formed by tapping a thickened flange, there is a problem in that the cost of processing the bolt hole increases.
[0007]
[Means for Solving the Problems]
The bearing device of the present invention includes an outer ring, and an inner ring rotatably supported on the outer ring via a rolling element.The outer peripheral portion of the outer ring has a mounting surface protruding radially outward and one side in the axial direction. A plurality of attachment portions having a plurality of attachment portions are formed in the circumferential direction, each of the attachment portions is provided with a bolt hole into which a fixing bolt is inserted, and at least a surface opposite to the attachment surface of each of the attachment portions, A reinforcing portion for supporting the mounting portion with respect to the outer peripheral portion of the outer race is provided at any position except for the bolt hole portion.
[0008]
In the above-described bearing device, each mounting portion has a reinforcing portion on the back side, that is, the surface opposite to the mounting surface, and thus exhibits a sufficiently large strength against an external load, particularly an axial load. In this case, the weight increases due to the addition of the reinforcing portion, but the rate of the weight increase is smaller than the rate of the strength increase due to the addition of the reinforcing portion, so that the weight increase is suppressed to a level that does not cause a problem.
[0009]
Further, since the thickness of the bolt hole portion of the mounting portion does not need to be particularly thick, the processing cost of the bolt hole does not increase.
[0010]
The reinforcing portion may be provided on the back surface of the mounting portion so as to avoid the bolt hole portion, and the shape is not particularly limited. In the case where the reinforcing portion is a rib provided from both sides of the bolt hole to the outer peripheral portion of the outer ring, the rib supports the rear surface of the mounting portion so as to project against the outer peripheral surface of the outer ring. But the weight increase is small.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
[First Embodiment]
1 to 5 show a first embodiment of the present invention. Here, a bearing device used on the driving wheel side of an automobile will be described as an example.
[0012]
FIG. 1 shows the overall appearance of the bearing device according to the first embodiment, FIG. 2 shows the rear shape of a half of the bearing device, and FIGS. 3 to 5 show different cross-sectional positions of the bearing device. 3 shows the cross-sectional shape. In these figures, reference numeral 1 denotes an outer ring, 2 denotes an inner ring, 3 denotes a mounting portion, 4 denotes a reinforcing portion of the mounting portion 3, and 5 denotes a bridge portion between the mounting portions 3 and 3.
[0013]
The outer ring 1 and the inner ring 2 constitute a double-row outward-facing angular ball bearing together with a ball and a cage provided therebetween, and the internal configuration thereof will be described later.
[0014]
The mounting portion 3 is for mounting a member on the vehicle body side such as a knuckle, and a plurality (five in the illustrated example) is formed on the outer peripheral portion of the outer ring 1 at equal intervals in the circumferential direction. The mounting portion 3 protrudes radially outward in a plate shape, has a mounting surface 3a on one side in the axial direction, and has a bolt hole 6 in which a fixing bolt is inserted in a shape orthogonal to the mounting surface 3a. Are drilled.
[0015]
The reinforcing portion 4 supports the mounting portion 3 with respect to the outer peripheral portion of the outer ring 1, and is provided on the back side of each mounting portion 3, that is, on the side opposite to the mounting surface 3 a so as to avoid the bolt hole 6. I have. In this embodiment, the reinforcing portion 4 is a rib, and is provided in a form protruding in the axial direction from the side opposite to the mounting surface 3a from both sides of the bolt hole 6 to the outer peripheral portion of the outer ring 1.
[0016]
The bridging portion 5 is provided between the mounting portions 3 adjacent to each other in the circumferential direction, and connects the mounting portions 3 to each other. In this embodiment, as shown in FIG. 4 and FIG. 5, the thickness E of the bridge portion 5 is substantially the same as the thickness D of the mounting portion 3, and the height h projecting outward in the radial direction is The projection height H of the portion 3 is set lower.
[0017]
As shown in FIGS. 4 and 5, the outer ring 1 and the inner ring 2 constitute a double-row outward-facing angular ball bearing 9 together with the ball 7 and the crown retainer 8 between the inner and outer wheels 1 and 2. .
[0018]
That is, two rows of raceway grooves are formed in the outer race 1. The inner ring 2 is a set of two inner rings, each having one row of raceway grooves. A plurality of balls 7, 7,... Arranged in two rows and two crown-shaped retainers 8, 8 are provided between the inner and outer rings 1, 2. Reference numeral 10 denotes a seal provided at the shaft end between the inner and outer rings 1 and 2.
[0019]
When the bearing device having the above configuration is used as a wheel bearing device for an automobile, a knuckle or a carrier, which is a member on the vehicle body side, is applied to the mounting surface 3a of the mounting portion 3, and the knuckle or the like and the mounting portion 3 Are fixedly connected to each other by bolts inserted into the bolt holes 6 of the mounting portion 3.
[0020]
In the above configuration, each mounting portion 3 is annularly connected to the bridging portion 5 and the other mounting portions 3 to form a flange as a whole, and the reinforcing portion 4 is provided on the back side. Supports the rear surface of the mounting portion 3 so as to project against the outer peripheral surface of the outer ring 1, and exhibits sufficiently large strength against an axial load.
[0021]
In this case, the rate of increase in weight due to the addition of the reinforcement 4 is smaller than the rate of increase in strength due to the addition of the reinforcement 4, and the increase in weight is suppressed to a level that does not pose a problem.
[0022]
Further, since the projecting height h of the bridge portion 5 is lower than the projecting height H of the attachment portion 3, the weight can be reduced by the reduced height of the bridge portion 5, and a constant height in the circumferential direction can be achieved. The weight can be reduced to a lower value as compared with the one having the flange.
[0023]
On the manufacturing side, the thickness of the bolt hole 6 portion of the mounting portion 3 does not need to be particularly thick, so that the processing cost of the bolt hole 6 does not increase.
[0024]
As described above, the reinforcing part 4 is formed on the back side of the mounting part 3 so as to avoid the bolt hole 6. Therefore, the bolt hole 6 becomes an area where the reinforcing portion 4 is not formed. The area of the non-formed area of the reinforcing portion 4 is desirably the area corresponding to the head of the fixing bolt inserted into the bolt hole 6 or the seat surface of the nut screwed to the bolt. It does not need this space. For example, when a member such as a knuckle is attached to the attachment portion 3, in a method of inserting the tip end of the bolt into the bolt hole 6 of the attachment portion 3 from the member side, the area where the reinforcing portion 4 is not formed is replaced with the bolt. It is not necessary to make the area occupied by the head and the nut, and only the opening of the bolt hole 6 may be the area where the reinforcing portion 4 is not formed.
[0025]
[Second embodiment]
FIG. 6 is a sectional view taken along the axial direction of a bearing device according to a second embodiment of the present invention.
[0026]
In the second embodiment, as in the first embodiment, the outer ring 1 has a mounting portion 3 having a bolt hole 6 on the outer peripheral portion thereof and a rib-shaped supporting portion 3 supporting the mounting portion 3 with respect to the outer peripheral portion of the outer ring 1. A reinforcing portion 4 and a bridging portion 5 that connects the mounting portions 3 and 3 that are adjacent to each other in the circumferential direction are provided.
[0027]
The bridging portion 5 in this embodiment is formed such that the protruding height h is lower than the protruding height H of the mounting portion 3 and the thickness e is smaller than the thickness D of the mounting portion 3. The other parts are the same as those of the first embodiment, and the corresponding parts are denoted by the same reference numerals and description thereof will be omitted.
[0028]
In this configuration, since the thickness e of the bridging portion 5 is smaller, the weight can be reduced as compared with the first embodiment, which is advantageous in reducing the weight of the entire bearing device.
[0029]
As in the first embodiment, the mounting portion 3 has a sufficiently large strength against an axial load, and the processing cost of the bolt hole 6 does not increase.
[0030]
[Third embodiment]
FIG. 7 is a sectional view of an axial direction of a bearing device according to a third embodiment of the present invention.
[0031]
In the third embodiment, an outer peripheral portion of the outer race 1 is provided with a mounting portion 3 having a bolt hole 6 and a rib-shaped reinforcing portion 4 for supporting the mounting portion 3 with respect to the outer peripheral portion of the outer race 1. However, a bridging portion that connects the mounting portions 3 and 3 that are adjacent to each other in the circumferential direction is omitted. The other parts are the same as those of the first embodiment, and corresponding parts are denoted by the same reference numerals.
[0032]
In this configuration, since the bridging portion is omitted, the weight can be further reduced as compared with the second embodiment. It is the same as the first embodiment that the mounting portion 3 has a sufficiently large strength against the axial load due to the reinforcing portion 4 on the back side, and that the processing cost of the bolt hole 6 does not increase. .
[0033]
[Fourth embodiment]
FIG. 8 is a sectional view of an axial direction of a bearing device according to a fourth embodiment of the present invention.
[0034]
Also in the fourth embodiment, as in the first embodiment, the outer peripheral portion of the outer race 1 has a mounting portion 3 having a bolt hole 6 and a rib-shaped supporting portion for supporting the mounting portion 3 with respect to the outer peripheral portion of the outer race 1. A reinforcing portion 4 and a bridging portion 5 for connecting the mounting portions 3 and 3 which are adjacent to each other in the circumferential direction are provided. The protruding height outward in the direction is lower than the mounting portion 3.
[0035]
In this embodiment, a hollow hub shaft 11 is provided in addition to the double-row outward angular ball bearing 9 partially including the outer ring 1.
[0036]
The double row outward-facing angular contact ball bearings 9 are arranged in two rows: a single outer ring 1 having two rows of raceway grooves, and inner rings 12 and 13 each having a single row of raceways. , And two crown-shaped retainers 8, 8 are provided.
[0037]
The hub shaft 11 has a large-diameter outer peripheral surface serving as one inner ring 12 of the double-row outward-facing angular ball bearing 9. The other inner ring 13 is fitted on the small diameter outer peripheral surface of the hub shaft 11.
[0038]
A flange 14 extending radially outward is provided near one axial end of the hub shaft 11 (near the right end in the figure). Through holes 15 are provided in several places on the circumference of the flange 14, and bolts 16 are press-fitted into the through holes 15 in a state of protruding outward in the axial direction. The bolt 16 has a serration 16a at the base and a thread groove 16b at the distal end.
[0039]
In the above configuration, the mounting portion 3 of the outer race 1 is non-rotatably mounted to the knuckle 17 (or carrier), which is a member on the vehicle body side, with the bolt 18. A drive shaft 19 is spline-fitted to the inner periphery of the hub shaft 11 and integrally connected by a nut 20. The outer surface of the flange 14 of the hub axle 11 (the surface on the vehicle outer side on the right side in FIG. 8) and the nut 21 screwed to the bolt 16 form the disk rotor 22 of the disk brake device and the wheel. The wheel 23 is clamped and fixed.
[0040]
[Other embodiments]
The reinforcing portion is not limited to the rib shape as described above. The reinforcing portion is provided on the rear surface of the mounting portion 3 at any position except at least the bolt hole 6 portion with respect to the outer peripheral portion of the outer ring 1. What is necessary is just to be provided in the form which can support.
[0041]
FIG. 9 shows another embodiment of the reinforcing portion. The reinforcing portion 4A of this embodiment is formed so as to surround the bolt hole 6. The reinforcing portion 4A having this shape has a higher reinforcing strength than the reinforcing portion 4 shown in FIGS.
[0042]
The bearing included as a main part in the bearing device of the present invention is not limited to a ball bearing, but may be a roller bearing or a tapered roller bearing.
[0043]
INDUSTRIAL APPLICABILITY The present invention can be applied not only to a bearing device for a driving wheel but also to a bearing device for a driven wheel. Further, the present invention can be applied to other bearing devices having a structure in which a fixed member is attached to the outer ring side.
[0044]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, since the attachment part attached to the vehicle body side members, such as a knuckle, is reinforced by the reinforcement part in the back side, it demonstrates sufficient intensity | strength with respect to external loads, especially axial load. I do. In this case, the rate of increase in weight due to the addition of the reinforcing portion is smaller than the rate of increase in strength due to the addition of the reinforcing portion, so that the increase in weight is suppressed to a level that does not cause any particular problem.
[0045]
Further, since the thickness of the bolt hole portion of the mounting portion does not need to be particularly thick, the processing cost of the bolt hole does not increase.
[0046]
In particular, when the reinforcing portion is a rib provided from both sides of the bolt hole to the outer peripheral portion of the outer ring, the rib supports the rear surface of the mounting portion so as to project against the outer peripheral surface of the outer ring, The reinforcing effect is large, and the weight increase is small.
[Brief description of the drawings]
FIG. 1 is an external perspective view of a bearing device according to an embodiment of the present invention.
FIG. 2 is a rear view of a half of the bearing device of FIG. 1;
FIG. 3 is a sectional view taken along the line EA in FIG. 2;
FIG. 4 is a sectional view taken along the roll line of FIG. 2;
FIG. 5 is a cross-sectional view along the Harha line in FIG. 2;
FIG. 6 is an axial sectional view of a bearing device according to a second embodiment of the present invention.
FIG. 7 is an axial sectional view of a bearing device according to a third embodiment of the present invention.
FIG. 8 is a sectional view along an axial direction of a bearing device according to a fourth embodiment of the present invention.
9A and 9B are diagrams showing another embodiment of the reinforcing portion, wherein FIG. 9A is a rear view of the reinforcing portion, and FIG. 9B is a cross-sectional view taken along the Nini line of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 3 Mounting part 3a Mounting surface 4 Reinforcement part 5 Bridge part 6 Bolt hole 7 Ball (rolling element)

Claims (2)

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を備え、
前記外輪の外周部に、径方向外方に突出し軸方向一方側に取り付け面を有する取り付け部が複数個円周方向に形成され、前記各取り付け部には、固定用ボルトが挿入されるボルト孔が設けられ、
前記各取り付け部の前記取り付け面とは反対側の面で、少なくとも前記ボルト孔の部分を除くいずれかの位置に、前記外輪の外周部に対して前記取り付け部を支える補強部が設けられていることを特徴とする軸受装置。An outer ring, and an inner ring rotatably supported on the outer ring via a rolling element,
At an outer peripheral portion of the outer ring, a plurality of mounting portions projecting radially outward and having a mounting surface on one axial side are formed in a circumferential direction, and each of the mounting portions has a bolt hole into which a fixing bolt is inserted. Is provided,
A reinforcing portion that supports the mounting portion with respect to the outer peripheral portion of the outer ring is provided at a position on the opposite side of the mounting surface of each of the mounting portions except at least the bolt hole portion. A bearing device characterized by the above-mentioned. 請求項１に記載の軸受装置において、
前記補強部は、前記ボルト孔の両側位置から前記外輪の外周部にかけて設けられたリブであることを特徴とする軸受装置。The bearing device according to claim 1,
The bearing device, wherein the reinforcing portion is a rib provided from a position on both sides of the bolt hole to an outer peripheral portion of the outer ring.
JP2002197074A 2002-07-05 2002-07-05 Bearing device Expired - Fee Related JP4239495B2 (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007071352A (en) * 2005-09-09 2007-03-22 Jtekt Corp Rolling bearing device for wheels
JP2008074332A (en) * 2006-09-25 2008-04-03 Jtekt Corp Rolling bearing device for wheels
WO2009028681A1 (en) * 2007-08-31 2009-03-05 Jtekt Corporation Rolling bearing device for wheel
JP2009154601A (en) * 2007-12-25 2009-07-16 Ntn Corp Wheel bearing device
JP2009192083A (en) * 2008-02-14 2009-08-27 Snr Roulements Roller bearing with a difference in rigidity in the area where the deformation measuring device is installed
WO2010016470A1 (en) * 2008-08-05 2010-02-11 株式会社ジェイテクト Rolling bearing device
JP2010060094A (en) * 2008-09-05 2010-03-18 Nsk Ltd Hub unit bearing and manufacturing method therefor
WO2010061949A1 (en) * 2008-11-28 2010-06-03 株式会社ジェイテクト Rolling bearing device for wheel
CN105014406A (en) * 2015-07-15 2015-11-04 苏州柏德纳科技有限公司 Accessory for supporting
KR20180110333A (en) * 2017-03-29 2018-10-10 현대모비스 주식회사 Wheel bearing for vehicle and knuckle apparatus including the same
CN114776703A (en) * 2022-04-06 2022-07-22 上海天安轴承有限公司 Laser radar bearing

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007071352A (en) * 2005-09-09 2007-03-22 Jtekt Corp Rolling bearing device for wheels
JP2008074332A (en) * 2006-09-25 2008-04-03 Jtekt Corp Rolling bearing device for wheels
WO2009028681A1 (en) * 2007-08-31 2009-03-05 Jtekt Corporation Rolling bearing device for wheel
JP2009154601A (en) * 2007-12-25 2009-07-16 Ntn Corp Wheel bearing device
JP2009192083A (en) * 2008-02-14 2009-08-27 Snr Roulements Roller bearing with a difference in rigidity in the area where the deformation measuring device is installed
US8690448B2 (en) 2008-08-05 2014-04-08 Jtekt Corporation Rolling bearing device
WO2010016470A1 (en) * 2008-08-05 2010-02-11 株式会社ジェイテクト Rolling bearing device
JP2010038251A (en) * 2008-08-05 2010-02-18 Jtekt Corp Rolling bearing device
JP2010060094A (en) * 2008-09-05 2010-03-18 Nsk Ltd Hub unit bearing and manufacturing method therefor
WO2010061949A1 (en) * 2008-11-28 2010-06-03 株式会社ジェイテクト Rolling bearing device for wheel
JP2010151311A (en) * 2008-11-28 2010-07-08 Jtekt Corp Rolling bearing device for wheel
EP2351655A4 (en) * 2008-11-28 2014-06-11 Jtekt Corp Rolling bearing device for wheel
US8770851B2 (en) 2008-11-28 2014-07-08 Jtekt Corporation Wheel rolling bearing apparatus
CN105014406A (en) * 2015-07-15 2015-11-04 苏州柏德纳科技有限公司 Accessory for supporting
KR20180110333A (en) * 2017-03-29 2018-10-10 현대모비스 주식회사 Wheel bearing for vehicle and knuckle apparatus including the same
KR102214033B1 (en) * 2017-03-29 2021-02-09 현대모비스 주식회사 Wheel bearing for vehicle and knuckle apparatus including the same
CN114776703A (en) * 2022-04-06 2022-07-22 上海天安轴承有限公司 Laser radar bearing

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