JP2005042764A - Tapered roller bearing device for wheel, and method for assembling the same - Google Patents

Tapered roller bearing device for wheel, and method for assembling the same Download PDF

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JP2005042764A
JP2005042764A JP2003200917A JP2003200917A JP2005042764A JP 2005042764 A JP2005042764 A JP 2005042764A JP 2003200917 A JP2003200917 A JP 2003200917A JP 2003200917 A JP2003200917 A JP 2003200917A JP 2005042764 A JP2005042764 A JP 2005042764A
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outer ring
roller bearing
inner shaft
tapered roller
bearing device
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JP2003200917A
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JP4321154B2 (en
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Masao Takimoto
将生 滝本
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Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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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
    • 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
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • 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
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • 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
    • 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
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for tapered roller bearings

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure in which a tapered roller bearing device 1 for a wheel can be easily assembled. <P>SOLUTION: In an inner side surface of a vehicle at a flange part 3b of an inner shaft 3, a circular swollen part 3j is provided to cover an outer circumferential surface of an outer ring 2 on one axial end side (vehicle outer side) through a prescribed gap. On the circular swollen part 3j, a trunk part (metal ring) 8a of a first seal device 8 is mounted, and seal lip parts 8b and 8c of the first seal device 8 are brought in contact with the outer circumferential surface on the vehicle outer side of the outer ring 2. In assembling this tapered roller bearing device 1, therefore, the first seal device 8 can be mounted to the inner shaft 3 in a regular state, instead of a temporary state, before the outer ring 2 is installed on the inner shaft 3. As the outer ring 2 is installed on the inner shaft 3, the seal lip parts 8b and 8c can be brought in contact with the outer circumferential surface on the vehicle outer side of the outer ring 2 in a correct state. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、例えば自動車などの車体に車輪を回転自在に支持する円すいころ軸受装置、およびその組立方法に関する。
【０００２】
【従来の技術】
上記車輪用の円すいころ軸受装置に関する従来例（例えば特許文献１参照）を、図６に示して説明する。図中、８０は外輪、８１はハブ本体（内軸）、８２は内輪、８３ａは第１列の円すいころ、８３ｂは第２列の円すいころ、８４は第１保持器、８５は第２保持器、８６は第１シール装置、８７は第２シール装置を示す。外輪８０は図示しないが車体などの一部であるナックルやキャリアに非回転に固定され、ハブ本体８１には図示しないが車輪が取り付けられる。ハブ本体８１に設けてある軌道部９０の大径側には大径部９１が、軌道部９０の小径側には小鍔９２がそれぞれ設けられている。第１シール装置８６は、金属環８６ａの内周にシールリップ部８６ｂを被着した構成であり、金属環８６ａの円筒部は外輪８０の軸方向一端側（車両アウタ側）の外周面に外嵌され、シールリップ部８６ｂはハブ本体８１のフランジ部９３と軌道部９０との間の曲面部に接触される。
【０００３】
このような円すいころ軸受装置を組み立てるにあたっては、まず、図７に示すように、ハブ本体８１に外輪８０を組み込む前に、ハブ本体８１のフランジ部９３と軌道部９０との間の曲面部に、第１シール装置８６をルーズに嵌めておく。次いで、第１保持器８４の各ポケット部に内径側から第１列の円すいころ８３ａを入れて、第１保持器８４と第１列の円すいころ８３ａの組品を作る。この組品をハブ本体８１の軌道部９０に配置する。なお、ハブ本体８１には小鍔９２があるが、円すいころ８３ａと第１保持器８４のポケット部との間には多少隙間が存在するので、円すいころ８３ａはポケット部に収納された状態で小鍔９２を乗り越えて軌道面９０上に配置される。このようにしたハブ本体８１の外径側に外輪８０を装着するのであるが、その最終段階で、外輪８０の軸方向一端側（車両アウタ側）の外周面に第１シール装置８６の金属環８６ａの円筒部を圧入嵌合する。
【０００４】
このような組み立て手順にしている理由を説明する。つまり、ハブ本体８１に小鍔９２を設けているために、ハブ本体８１に外輪８０を装着する前に、ハブ本体８１の軌道部９０上に第１列の円すいころ８３ａと第１保持器８４を組み付けておく必要がある。そのために、仮に、ハブ本体８１に外輪８０を外嵌装着する前に、外輪８０のほうに第１シール装置８６を取り付けていると、この第１シール装置８６を取り付けた外輪８０をハブ本体８１に装着するときに、ハブ本体８１に組み付けてある第１列の円すいころ８３ａに第１シール装置８６が干渉してしまい、ハブ本体８１に外輪８０を装着することができない。
【０００５】
【特許文献１】
特開２０００−９４９０２号公報
【０００６】
【発明が解決しようとする課題】
上記従来例では、ハブ本体８１に外輪８０を装着する過程で、ハブ本体８１のほうにルーズに嵌めておいた第１シール装置８６の金属環８６ａの円筒部を外輪８０の軸方向一端の外周面に圧入嵌合する作業が難しく、手間がかかる。
【０００７】
【課題を解決するための手段】
本発明は、第１、第２軌道部を有する外輪と、軸方向一端側に車輪取付用のフランジ部を有するとともに前記第１軌道部と対向する軌道部を有する内軸と、この内軸の軸方向他端側の外周に外嵌装着されかつ前記第２軌道部と対向する軌道部を有する内輪と、前記外輪の第１軌道部と前記内軸の軌道部との間に配置される第１列の円すいころおよび前記外輪の第２軌道部と前記内輪の軌道部との間に配置される第２列の円すいころと、前記各列の円すいころを円周方向に等配保持する保持器とを備えた車輪用の円すいころ軸受装置において、前記フランジ部の前記外輪側の面に、前記外輪の外周面における前記フランジ部寄りの領域を所定隙間を介して覆う環状膨出部が設けられており、前記環状膨出部に取り付けられる環状の胴体部と、この胴体部から径方向内方に延びて前記外輪の軸方向一端側の外周面に摺接するシールリップ部とを有するシール装置を備えた、ことを特徴としている。
【０００８】
なお、前記シール装置は、複数のシールリップ部を備えたものとするのが好ましい。シールリップ部を複数とする場合、すべてのシールリップ部を外輪に接触させるようにしてもよいし、また、いずれかのシールリップ部を外輪に接触させないようにしてもよい。さらに、前記シール装置に、内軸のフランジ部に接触または微小隙間を介して対向するシールリップ部を設けてもよい。
【０００９】
このような構成によれば、円すいころ軸受装置を組み立てるにあたって、外輪と内軸とを組み合わせる前に、内軸にシール装置と保持器および第１列の円すいころを組み付けることが可能になる。これにより、円すいころ軸受装置を組み立てる際に、この円すいころ軸受装置の各部材の取り扱いが容易になって、作業が簡単に行えるようになる。また、本発明のようにシール装置を外輪の外周に配置していれば、円すいころの配置空間に封入するグリースなどの潤滑剤の量が多くなる他、万一、水が前記シール装置を通過して前記空間に浸入したとしても、この水は、前記シール装置から第１列の円すいころまでの領域にほとんど不動な状態で存在する潤滑剤に混入するだけで、第１列の円すいころが転動する領域にまで到達せずに済む。
【００１０】
本発明の好ましい実施態様として、前記フランジ部の前記外輪側の面において前記環状膨出部よりも径方向内方に、環状窪みを設けた構成にすることができる。この場合、環状膨出部の軸方向への膨出寸法を小さくしても、環状膨出部の内周面の軸方向長さを長く確保することが可能になる。
【００１１】
本発明は、上記構成の車輪用の円すいころ軸受装置の組み立て方法として、前記シール装置を前記内軸の環状膨出部に取り付ける工程と、前記第１列の円すいころおよび前記保持器を前記内軸の軌道部上に組み込む工程と、前記内軸の軸方向他端側から前記外輪を装着することにより、この外輪の第１軌道部を前記第１列の円すいころに外接させるとともに、前記外輪の軸方向一端部を前記シール装置のシールリップ部の内周に差し入れる工程とを有するものとすることができる。
【００１２】
この組立方法によれば、上述したとおり、円すいころ軸受装置を組み立てる際に、この円すいころ軸受装置の各部材の取り扱いが容易になって、作業が簡単に行えるようになるので、円すいころ軸受装置の生産性が向上する。
【００１３】
【発明の実施の形態】
図１および図２に本発明の一実施形態を示している。図１は、車輪用の円すいころ軸受装置を示す断面図、図２は、図１の円すいころ軸受装置の組立手順を示す図である。
【００１４】
図において、１は複列外向きタイプの円すいころ軸受装置を示している。図１において円すいころ軸受装置１の左側は車両アウタ側であり、右側は車両インナ側である。
【００１５】
円すいころ軸受装置１は、例えば従動輪を支持するためのものであり、外輪２と、内軸３と、内輪４と、第１列の円すいころ５ａと、第２列の円すいころ５ｂと、車両アウタ側の第１保持器６と、車両インナ側の第２保持器７と、車両アウタ側の第１シール装置８と、車両インナ側の第２シール装置９とを備えている。
【００１６】
外輪２の内周面には二つの円すい形状の軌道部２ａ、２ｂが軸方向隣り合わせに設けられている。外輪２の外径には径方向外方へ延びるフランジ部２ｃが設けられている。車両アウタ側の第１軌道部２ａは、車両アウタ側へ向けて漸次大径となる傾きになっており、車両インナ側の第２軌道部２ｂは、車両インナ側へ向けて漸次大径となる傾きになっている。フランジ部２ｃは、車体の一部となるキャリアまたはナックルに図示しないボルトにより非回転に固定される。
【００１７】
内軸３は、軸部３ａと、軸部３ａの軸方向一端側（車両アウタ側）に径方向外方に延びるよう設けられるフランジ部３ｂと、フランジ部３ｂよりも車両アウタ側に軸方向に突出して設けられる円筒形のインロー部３ｃとを有している。軸部３ａの外径には、フランジ部３ｂ側から軸方向他端側（車両インナ側）に向けて、大径部３ｅと、外輪２の第１軌道部２ａと対向する円すい形状の軌道部３ｆと、軌道部３ｆよりも小径の小径部３ｇとが設けられている。大径部３ｅと軌道部３ｆの大径側とは、段差がついており、軌道部３ｆの大径側から大径部３ｅへ立ち上がる壁面（大鍔面）３ｈは、第１列の円すいころ５ａの大端面を案内する案内面とされる。軌道部３ｆの小径側には、径方向外方に膨出する小鍔３ｉが設けられている。フランジ部３ｂとインロー部３ｃとに、図示しないが車輪やブレーキディスクが取り付けられる。
【００１８】
内輪４の内周面には、外輪２の第２軌道部２ｂと対向する円すい形状の軌道部４ａが設けられており、この内輪４が内軸３の小径部３ｇに外嵌装着されている。この内輪４の軌道部４ａの大径側に大鍔４ｂが、また、軌道部４ａの小径側に小鍔４ｃがそれぞれ設けられている。なお、内軸３の小径部３ｇの端部は、組立前において円筒形にされていて、小径部３ｇに内輪４を外嵌した後で前記円筒形の端部を径方向外方に広げるように鍛造かしめすることによって、内輪４を内軸３に一体的に結合するとともに、内輪４に軸力を付与するようになっている。
【００１９】
第１列の円すいころ５ａは、外輪２の車両アウタ側の第１軌道部２ａと内軸３の軌道部３ｆとの間に配置され、第２列の円すいころ５ｂは、外輪２の車両インナ側の第２軌道部２ｂと内輪４の軌道部４ａとの間に配置されている。
【００２０】
第１、第２保持器６，７は、樹脂で射出成形されたもの、あるいは金属板をプレス成形して形成されたものであり、互いに同じ形状である。第１保持器６は、第１列の円すいころ５ａを円周方向のほぼ等間隔に配置したうえで、外径側へ抜け出ないようにする構造になっている。第２保持器７は、第２列の円すいころ５ｂを円周方向のほぼ等間隔に配置したうえで、外径側へ抜け出ないようにする構造になっている。第１、第２保持器６，７は、円すい形状になっており、その円周方向の複数箇所には、径方向に貫通するほぼ台形形状の孔からなるポケット６ａ，７ａが設けられている。第１、第２保持器６，７の外形サイズは、内軸３の軌道部３ｆや内輪４の軌道部４ａ上に配置される各列の円すいころ５ａ，５ｂの中心線を結んだ仮想の円すい面Ｘよりも大きく設定されている。ポケット６ａ，７ａに関しては、軸方向長さが円すいころ５ａ，５ｂの軸方向長さよりも大きく設定されており、円周方向幅が円すいころ５ａ，５ｂの外径よりも小さく設定されている。このように、第１、第２保持器６，７の外形サイズと第１、第２保持器６，７のポケット６ａ，７ａの大きさとを規定することにより、円すいころ５ａ，５ｂがポケット６ａ，７ａから外径側へ抜け出さないようになっている。
【００２１】
第１シール装置８および第２シール装置９は、円すいころ５ａ，５ｂが配置される環状空間１０を密封する。この環状空間１０には図示しないがグリースなどの潤滑剤が入れられる。
【００２２】
第１シール装置８は、外輪２の車両アウタ側の端部と内軸３のフランジ部３ｂとの間に配設される。この第１シール装置８が請求項に記載のシール装置に相当するので、以下で詳しく説明する。
【００２３】
また、第２シール装置９は、外輪２の車両インナ側の端部と内輪４の大鍔４ｂとの間に配設されるもので、シールリップ付きのシールリング９ａと、金属環のみからなるスリンガ９ｂとを組み合わせたパックシールである。なお、この第２シール装置は、本発明の特徴部分ではないので、特に限定されるものではなく、一般的に周知の各種のシール装置を用いることができる。
【００２４】
ここで、上述した第１シール装置８の構成および取り付け状態を詳しく説明する。
【００２５】
まず、内軸３のフランジ部３ｂの内面（車両インナ側の面）に環状膨出部３ｊが設けられている。この環状膨出部３ｊは、外輪２の車両アウタ側端部の外径寸法よりも大きな内径寸法に設定されており、外輪２の車両アウタ側の外周面を所定隙間を介して覆う。但し、この実施形態では、フランジ部３ｂの内面において環状膨出部３ｊよりも径方向内方に環状窪み３ｋを設けることによって、環状膨出部３ｊを軸方向にあまり膨出させることなく、環状膨出部３ｊの内周面の軸方向長さを可及的に長く確保するようにしている。
【００２６】
この環状膨出部３ｊに、第１シール装置８が取り付けられている。この第１シール装置８は、金属環８ａの内周に二つのシールリップ部８ｂ，８ｃを被着した構成である。金属環８ａは、円筒部８ａ１の車両インナ側端部に径方向外方に延びる鍔部８ａ２を一体に形成した形状である。二つのシールリップ部８ｂ，８ｃは、いずれも、金属環８ａの鍔部８ａ２の内周に加硫成型により接着されるゴムあるいは樹脂などからなり、二股形状で反対向きに斜めに傾いた形状になっている。そして、内軸３の環状膨出部３ｊの内周面に、第１シール装置８の金属環８ａの円筒部８ａ１が圧入により嵌合され、その状態で二つのシールリップ部８ｂ，８ｃが、外輪２の外周面における車両アウタ側端部に所定の締め代をもって接触される。
【００２７】
このように、第１シール装置８は、外輪２の外周面における車両アウタ側端部と環状膨出部３ｊの内周面との対向部分に、当該対向部分を直接的に塞ぐように配設されている。これによって、環状空間１０の車両アウタ側が塞がれるようになる。
【００２８】
以上説明した構成の円すいころ軸受装置１の組立方法を図２に示して説明する。なお、図２は、図１と関係つけて分りやすく説明するために、内軸３の中心線を水平にして図示しているが、実際の組立作業は、内軸３の中心線を垂直にして内軸３のフランジ部３ｂを下にする。
【００２９】
まず、図２の矢印▲１▼で示すように、内軸３に第１シール装置８を取り付ける。つまり、内軸３のフランジ部３ｂにおける環状膨出部３ｊの内周面に第１シール装置８の金属環８ａの円筒部８ａ１を圧入により嵌合する。この時点では、内軸３の軸部３ａにおいて車両インナ側の端部は、鍛造かしめを施していないので円筒形になっている。
【００３０】
この後、図２の矢印▲２▼で示すように、第１保持器６の各ポケット６ａに第１列の円すいころ５ａを組み付けた組品を、内軸３の軌道部３ｆ上に組み込む。このとき、図２の矢印▲３▼で示すように、第１列の円すいころ５ａを第１保持器６のポケット６ａとの間に存在する所定の隙間分だけ、径方向外方に動かすことにより、各円すいころ５ａを内軸３の小鍔３ｉを乗り越えさせるようにして、軌道部３ｆ上に配置させる。
【００３１】
次に、図２の矢印▲４▼で示すように、内軸３の軸部３ａの車両インナ側から外輪２を装着することにより、この外輪２の第１軌道部２ａを第１列の円すいころ５ａに外接させるとともに、第１シール装置８の内周に差し入れて第１シール装置８の二つのシールリップ部８ｂ，８ｃを外輪２の車両アウタ側の外周面に接触させる。
【００３２】
さらに、第２保持器７の各ポケット７ａに第２列の円すいころ５ｂを組み付けた組品を、内輪４の軌道部４ａ上に組み込んでから、これらの組品を図２の矢印▲５▼で示すように、外輪２の第２軌道部２ｂと内軸３の小径部３ｇとの間に差し入れる。
【００３３】
この後、内軸３の小径部３ｇの端部を径方向外方に広げるように鍛造かしめする。これにより、内輪４が内軸３に一体的に結合されるとともに、内輪４に軸力が付与される。
【００３４】
最後に、外輪２の車両インナ側端部と内輪４の大鍔４ｂとの間に第２シール装置９を装着することで、図１に示した円すいころ軸受装置１が完成する。
【００３５】
なお、上記組立方法において、第１保持器６と第１列の円すいころ５ａとの組品を、内軸３に組み込む工程は、例えば第１保持器６と第１列の円すいころ５ａとの組品を下に配置した状態で、その上から内軸３を差し入れ、この後で、前記組品を上下にひっくり返すようにしてもよい。
【００３６】
以上説明したように、円すいころ軸受装置１を組み立てるにあたって、内軸３に第１シール装置８を仮組みではなく正規の状態で取り付けておいて、この内軸３に外輪２を装着させるような作業ができるから、円すいころ軸受装置１を組み立てる過程において、円すいころ軸受装置１の各部材の取り扱いが容易になって、作業が簡単に行えるようになるなど、生産性が向上するようになる。
【００３７】
また、第１シール装置８を外輪２の外周に配置することで、第１シール装置８と第２シール装置９とで密封する環状空間１０の容積を大きくでき、この空間１０内に封入するグリースの量を多くできる。しかも、環状空間１０内に封入するグリースは、円すいころ５の周辺においてのみ流動するものの、環状空間１０において第１シール装置８から第１列の円すいころ５ａの大端面までの領域に存在するグリースは、ほとんど不動の状態になっているので、万一、外部の水が第１シール装置８を通過して空間１０に浸入したとしても、この水は、第１シール装置８から第１列の円すいころ５ａの大端面までの領域に存在するグリースに混入するだけで、第１列の円すいころ５ａが転動する領域にまで到達せずに済む。したがって、空間１０内で円すいころ５ａ周辺のグリースが劣化することが抑制されるので、円すいころ軸受装置１の寿命向上に貢献できる。
【００３８】
さらに、フランジ部３ｂの付け根側に環状窪み３ｋを設けているので、この環状窪み３ｋの軸方向でのへこみ分、外輪２の車両アウタ側端部をフランジ部３ｂ側に近づけるように設計することができて、円すいころ軸受装置１の全長を短くすることが可能になる。
【００３９】
以下、本発明の他の例を説明する。
【００４０】
上記実施形態において、第１シール装置８は、例えば図３や図４に示すようなタイプとすることができる。図３に示す第１シール装置８では、外側のシールリップ部８ｂを上半分の断面で三角形にし、その外周にガータスプリングと呼ばれる弾性リング８ｄを装着している。図４に示す第１シール装置８では、内側のシールリップ部８ｃを車両アウタ側へ傾く姿勢にしたうえで、外側シールリップ部８ｂの外側にサイドシールリップ部８ｅを設け、このサイドシールリップ部８ｅを内軸３のフランジ部３ｂの内面における付け根側に軸方向から接触させるようにしている。図３や図４に示す第１シール装置８であれば、上記実施形態と同様の組み立て面に関するメリットを得ることができて、しかも、密封性を上記実施形態のものに比べてさらに向上できる。特に、図４に示す第１シール装置８では、内軸３に外輪２を装着する過程で、内軸３側に取り付けてある第１シール装置８の内側のシールリップ部８ｃが、外輪２の車両アウタ側の外周面に接触することによって車両アウタ側に傾きやすくなるので、内側のシールリップ部８ｃが逆向きに反転することなく外輪２の車両アウタ側の外周面に適正な状態で接触するようになる。
【００４１】
上記実施形態において、第１シール装置８の金属環８ａの円筒部８ａ１を内軸３の環状膨出部３ｊの外周面に嵌合させるようにしてもよい。但し、この第１シール装置８でも、各シールリップ部は上記実施形態で説明したとおりの接触形態にする。
【００４２】
上記実施形態において、図示しないが、内軸３の小径側にさらにねじ軸部を形成し、このねじ軸部に対してナットを螺合することにより、内輪４を内軸３に対して固定する形態とすることができる。
【００４３】
上記実施形態に示す円すいころ軸受装置１において、内軸３と第１シール装置８を除く構成部品の形状などは特に限定されない。
【００４４】
本発明は、駆動輪の支持に用いるタイプの円すいころ軸受装置にも適用できる。このタイプの円すいころ軸受装置は、図示しないが、内軸３の中心にスプライン孔を設け、このスプライン孔に対して駆動軸をスプライン嵌合したような構造である。
【００４５】
図５に示すように、内軸３の軌道部３ｆの小径側に、上記実施形態で示した小鍔３ｉを設けずに、軌道部３ｆの小径側部分と同径の円筒面３ｍを設けることができる。この円筒面３ｍは、軌道部３ｆの小径側端部より小径でもよい。この場合、内軸３の軌道部３ｆを形成するときの加工が簡単に行えるなど、製造面でメリットがある。また、内輪４についても軌道部４ａの小径側に、上記実施形態で示した小鍔４ｃを設けずに、軌道部４ａの小径側端部と同径の円筒面４ｄを設けている。この場合、図２の矢印▲５▼で示す段階において、第２保持器７に第２列の円すいころ５ｂを組み合わせた組品を、外輪２の第２軌道部２ｂの内径側に差し入れておいてから、この第２列の円すいころ５ｂの内径側と内軸３の小径部３ｇとの間に内輪４を組み入れることができる。
【００４６】
【発明の効果】
本発明では、円すいころ軸受装置を組み立てる際に、この円すいころ軸受装置を構成する各部材の取り扱いが容易になり、円すいころ軸受装置の生産性向上に貢献できるようになる。
【図面の簡単な説明】
【図１】本発明の一実施形態に係る円すいころ軸受装置を示す断面図
【図２】図１の円すいころ軸受装置の組立手順を示す図
【図３】図１に示す第１シール装置の他の例で、円すいころ軸受装置の要部を示す図
【図４】図１に示す第１シール装置の他の例で、円すいころ軸受装置の要部を示す図
【図５】本発明の他の実施形態に係る円すいころ軸受装置を示す断面図
【図６】従来例の円すいころ軸受装置を示す断面図
【図７】従来例の不具合の説明に用いる組立工程図
【符号の説明】
１ 円すいころ軸受装置 ２ 外輪
２ａ 外輪の第１軌道部 ２ｂ 外輪の第２軌道部
３ 内軸 ３ａ 内軸の軸部
３ｂ 内軸のフランジ部 ３ｆ 内軸の軌道部
３ｊ フランジ部の環状膨出部 ３ｋ フランジ部の環状窪み
４ 内輪 ４ａ 内輪の軌道部
５ａ 第１列の円すいころ ５ｂ 第２列の円すいころ
６ 第１保持器 ７ 第２保持器
８ 第１シール装置 ８ａ 第１シール装置の金属環
８ｂ 第１シール装置の外側シールリップ部
８ｃ 第１シール装置の内側シールリップ部
９ 第２シール装置[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tapered roller bearing device that rotatably supports a wheel on a vehicle body such as an automobile, and an assembling method thereof.
[0002]
[Prior art]
A conventional example (see, for example, Patent Document 1) related to the tapered roller bearing device for wheels will be described with reference to FIG. In the figure, 80 is an outer ring, 81 is a hub body (inner shaft), 82 is an inner ring, 83a is a first row of tapered rollers, 83b is a second row of tapered rollers, 84 is a first cage, and 85 is a second holding. , 86 is a first sealing device, and 87 is a second sealing device. Although not shown, the outer ring 80 is fixed to a knuckle or a carrier that is a part of a vehicle body or the like, and a wheel is attached to the hub body 81 although not shown. A large diameter portion 91 is provided on the large diameter side of the track portion 90 provided in the hub body 81, and a small flange 92 is provided on the small diameter side of the track portion 90. The first seal device 86 has a configuration in which a seal lip portion 86b is attached to the inner periphery of the metal ring 86a, and the cylindrical portion of the metal ring 86a is externally attached to the outer peripheral surface of one end side in the axial direction of the outer ring 80 (vehicle outer side). The seal lip portion 86 b is brought into contact with the curved surface portion between the flange portion 93 and the track portion 90 of the hub body 81.
[0003]
In assembling such a tapered roller bearing device, first, as shown in FIG. 7, before assembling the outer ring 80 into the hub body 81, the curved surface portion between the flange portion 93 and the raceway portion 90 of the hub body 81 is used. The first seal device 86 is loosely fitted. Next, the first row of tapered rollers 83a are inserted into the respective pocket portions of the first cage 84 from the inner diameter side to make an assembly of the first cage 84 and the first row of tapered rollers 83a. This assembly is arranged on the track portion 90 of the hub body 81. The hub main body 81 has a small collar 92, but since there is a slight gap between the tapered roller 83a and the pocket portion of the first retainer 84, the tapered roller 83a is stored in the pocket portion. Over the gavel 92, it is arranged on the track surface 90. The outer ring 80 is mounted on the outer diameter side of the hub main body 81 as described above. At the final stage, the metal ring of the first seal device 86 is disposed on the outer peripheral surface of the outer ring 80 at one end side in the axial direction (vehicle outer side). The cylindrical portion 86a is press-fitted and fitted.
[0004]
The reason for this assembly procedure will be described. That is, since the gavel 92 is provided on the hub body 81, the first row of tapered rollers 83 a and the first retainer 84 are placed on the raceway portion 90 of the hub body 81 before the outer ring 80 is attached to the hub body 81. Must be assembled. Therefore, if the first seal device 86 is attached to the outer ring 80 before the outer ring 80 is fitted on the hub body 81, the outer ring 80 to which the first seal device 86 is attached is attached to the hub body 81. 1, the first seal device 86 interferes with the first row of tapered rollers 83 a assembled to the hub body 81, and the outer ring 80 cannot be attached to the hub body 81.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 2000-94902
[Problems to be solved by the invention]
In the above conventional example, in the process of mounting the outer ring 80 on the hub body 81, the cylindrical portion of the metal ring 86 a of the first seal device 86 fitted loosely toward the hub body 81 is connected to the outer periphery of one end in the axial direction of the outer ring 80. The work of press-fitting to the surface is difficult and time-consuming.
[0007]
[Means for Solving the Problems]
The present invention includes an outer ring having first and second track portions, an inner shaft having a wheel mounting flange portion on one axial end side and a track portion facing the first track portion, and the inner shaft An inner ring having a track portion that is externally fitted on the outer circumference on the other end side in the axial direction and that faces the second track portion, and a first ring disposed between the first track portion of the outer ring and the track portion of the inner shaft. One row of tapered rollers, a second row of tapered rollers disposed between the second raceway portion of the outer ring and the raceway portion of the inner ring, and holding for equally holding the tapered rollers of each row in the circumferential direction In the tapered roller bearing device for a wheel provided with a container, an annular bulge portion is provided on the outer ring side surface of the flange portion to cover a region near the flange portion on the outer peripheral surface of the outer ring with a predetermined gap. An annular body portion attached to the annular bulge portion; With a seal device having a sliding contact with the seal lip portion on the outer peripheral surface of the axial end of the outer ring extending from the body portion radially inwardly, and wherein a.
[0008]
The sealing device preferably includes a plurality of sealing lip portions. When there are a plurality of seal lip portions, all the seal lip portions may be brought into contact with the outer ring, or any of the seal lip portions may not be brought into contact with the outer ring. Furthermore, the seal device may be provided with a seal lip portion that is in contact with the flange portion of the inner shaft or is opposed via a minute gap.
[0009]
According to such a configuration, in assembling the tapered roller bearing device, it is possible to assemble the seal device, the cage, and the first row of tapered rollers to the inner shaft before combining the outer ring and the inner shaft. Thereby, when assembling the tapered roller bearing device, handling of each member of the tapered roller bearing device is facilitated, and the operation can be easily performed. If the sealing device is arranged on the outer periphery of the outer ring as in the present invention, the amount of lubricant such as grease to be enclosed in the arrangement space of the tapered rollers increases, and in the unlikely event that water passes through the sealing device. Even if the water enters the space, the water is mixed into the lubricant that is almost immobile in the region from the sealing device to the first row of tapered rollers. There is no need to reach the rolling area.
[0010]
As a preferred embodiment of the present invention, an annular recess may be provided on the outer ring side surface of the flange portion, radially inward from the annular bulge portion. In this case, even if the bulging dimension in the axial direction of the annular bulging portion is reduced, it is possible to ensure a long axial length of the inner peripheral surface of the annular bulging portion.
[0011]
According to the present invention, as a method for assembling the tapered roller bearing device for a wheel having the above-described configuration, the step of attaching the seal device to the annular bulging portion of the inner shaft, the tapered roller and the cage in the first row The outer race is mounted on the raceway portion of the shaft, and the outer race is mounted from the other axial end of the inner shaft, thereby bringing the first raceway portion of the outer race into contact with the first row of tapered rollers, and the outer race. And inserting the one axial end of the sealing device into the inner periphery of the seal lip portion of the seal device.
[0012]
According to this assembly method, as described above, when the tapered roller bearing device is assembled, each member of the tapered roller bearing device can be easily handled, and the operation can be easily performed. Productivity is improved.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show an embodiment of the present invention. FIG. 1 is a cross-sectional view showing a tapered roller bearing device for a wheel, and FIG. 2 is a diagram showing an assembly procedure of the tapered roller bearing device of FIG.
[0014]
In the figure, reference numeral 1 denotes a double row tapered roller bearing device. In FIG. 1, the left side of the tapered roller bearing device 1 is the vehicle outer side, and the right side is the vehicle inner side.
[0015]
The tapered roller bearing device 1 is, for example, for supporting a driven wheel, and includes an outer ring 2, an inner shaft 3, an inner ring 4, a first row of tapered rollers 5a, a second row of tapered rollers 5b, A first cage 6 on the vehicle outer side, a second cage 7 on the vehicle inner side, a first seal device 8 on the vehicle outer side, and a second seal device 9 on the vehicle inner side are provided.
[0016]
On the inner peripheral surface of the outer ring 2, two conical track portions 2a and 2b are provided adjacent to each other in the axial direction. The outer diameter of the outer ring 2 is provided with a flange portion 2c extending outward in the radial direction. The first track portion 2a on the vehicle outer side has an inclination that gradually increases in diameter toward the vehicle outer side, and the second track portion 2b on the vehicle inner side gradually increases in diameter toward the vehicle inner side. It is tilted. The flange portion 2c is fixed to a carrier or knuckle that is a part of the vehicle body in a non-rotating manner by a bolt (not shown).
[0017]
The inner shaft 3 includes a shaft portion 3a, a flange portion 3b provided on one end side (vehicle outer side) in the axial direction of the shaft portion 3a so as to extend radially outward, and more axially on the vehicle outer side than the flange portion 3b. And a cylindrical inlay portion 3c provided to project. The outer diameter of the shaft portion 3a is a conical track portion facing the large diameter portion 3e and the first track portion 2a of the outer ring 2 from the flange portion 3b side toward the other axial end side (vehicle inner side). 3f and a small diameter portion 3g having a smaller diameter than the raceway portion 3f are provided. The large diameter portion 3e and the large diameter side of the raceway portion 3f are stepped, and the wall surface (large collar surface) 3h rising from the large diameter side of the raceway portion 3f to the large diameter portion 3e is a tapered roller 5a in the first row. It is a guide surface that guides the large end surface of the. On the small-diameter side of the track portion 3f, a small rod 3i bulging outward in the radial direction is provided. Although not shown, wheels and brake disks are attached to the flange portion 3b and the spigot portion 3c.
[0018]
A conical track portion 4 a facing the second track portion 2 b of the outer ring 2 is provided on the inner peripheral surface of the inner ring 4, and the inner ring 4 is externally fitted to the small diameter portion 3 g of the inner shaft 3. . A large ridge 4b is provided on the large diameter side of the raceway portion 4a of the inner ring 4, and a small ridge 4c is provided on the small diameter side of the raceway portion 4a. The end of the small-diameter portion 3g of the inner shaft 3 is cylindrical before assembly, and after the inner ring 4 is fitted on the small-diameter portion 3g, the cylindrical end is expanded outward in the radial direction. The inner ring 4 is integrally coupled to the inner shaft 3 and the axial force is applied to the inner ring 4 by forging and crimping.
[0019]
The first row of tapered rollers 5 a is disposed between the first track portion 2 a of the outer ring 2 on the vehicle outer side and the track portion 3 f of the inner shaft 3, and the second row of tapered rollers 5 b is arranged on the vehicle inner side of the outer ring 2. The second track portion 2b on the side and the track portion 4a of the inner ring 4 are disposed.
[0020]
The first and second cages 6 and 7 are injection-molded with resin or formed by press-molding a metal plate and have the same shape. The first cage 6 has a structure in which the tapered rollers 5a in the first row are arranged at substantially equal intervals in the circumferential direction so as not to come out to the outer diameter side. The second cage 7 has a structure in which the tapered rollers 5b in the second row are arranged at substantially equal intervals in the circumferential direction and are not pulled out to the outer diameter side. The first and second cages 6 and 7 have a conical shape, and pockets 6a and 7a made of substantially trapezoidal holes penetrating in the radial direction are provided at a plurality of locations in the circumferential direction. . The outer size of the first and second cages 6 and 7 is a virtual one that connects the center lines of the tapered rollers 5a and 5b in each row arranged on the raceway portion 3f of the inner shaft 3 and the raceway portion 4a of the inner ring 4. It is set to be larger than the conical surface X. Regarding the pockets 6a and 7a, the axial length is set larger than the axial length of the tapered rollers 5a and 5b, and the circumferential width is set smaller than the outer diameter of the tapered rollers 5a and 5b. In this way, by defining the outer size of the first and second cages 6 and 7 and the size of the pockets 6a and 7a of the first and second cages 6 and 7, the tapered rollers 5a and 5b are formed into the pockets 6a. , 7a so as not to come out to the outer diameter side.
[0021]
The first sealing device 8 and the second sealing device 9 seal the annular space 10 in which the tapered rollers 5a and 5b are disposed. Although not shown, the annular space 10 is filled with a lubricant such as grease.
[0022]
The first sealing device 8 is disposed between the end portion of the outer ring 2 on the vehicle outer side and the flange portion 3 b of the inner shaft 3. The first sealing device 8 corresponds to the sealing device described in the claims, and will be described in detail below.
[0023]
The second seal device 9 is arranged between the end of the outer ring 2 on the vehicle inner side and the large collar 4b of the inner ring 4, and consists of a seal ring 9a with a seal lip and a metal ring only. It is a pack seal combined with a slinger 9b. In addition, since this 2nd sealing device is not the characterizing part of this invention, it is not specifically limited, Generally well-known various sealing devices can be used.
[0024]
Here, the configuration and the mounting state of the first sealing device 8 described above will be described in detail.
[0025]
First, an annular bulging portion 3j is provided on the inner surface (surface on the vehicle inner side) of the flange portion 3b of the inner shaft 3. The annular bulging portion 3j is set to have an inner diameter dimension larger than the outer diameter dimension of the vehicle outer side end portion of the outer ring 2, and covers the outer peripheral surface of the outer ring 2 on the vehicle outer side through a predetermined gap. However, in this embodiment, by providing the annular recess 3k radially inward of the inner surface of the flange portion 3b with respect to the annular bulge portion 3j, the annular bulge portion 3j does not bulge so much in the axial direction. The axial length of the inner peripheral surface of the bulging portion 3j is as long as possible.
[0026]
The first sealing device 8 is attached to the annular bulging portion 3j. The first seal device 8 has a configuration in which two seal lip portions 8b and 8c are attached to the inner periphery of the metal ring 8a. The metal ring 8a has a shape in which a flange portion 8a2 extending radially outward is integrally formed at the vehicle inner side end portion of the cylindrical portion 8a1. The two seal lip portions 8b and 8c are both made of rubber or resin bonded to the inner periphery of the flange portion 8a2 of the metal ring 8a by vulcanization molding, and have a bifurcated shape that is inclined obliquely in the opposite direction. It has become. Then, the cylindrical portion 8a1 of the metal ring 8a of the first seal device 8 is fitted into the inner peripheral surface of the annular bulging portion 3j of the inner shaft 3 by press fitting, and in this state, the two seal lip portions 8b and 8c are The outer peripheral surface of the outer ring 2 is brought into contact with a vehicle outer side end portion with a predetermined tightening allowance.
[0027]
As described above, the first seal device 8 is disposed at the opposed portion of the outer circumferential surface of the outer ring 2 between the vehicle outer side end and the inner circumferential surface of the annular bulging portion 3j so as to directly block the opposed portion. Has been. As a result, the vehicle outer side of the annular space 10 is blocked.
[0028]
A method for assembling the tapered roller bearing device 1 having the above-described configuration will be described with reference to FIG. Note that FIG. 2 is illustrated with the center line of the inner shaft 3 horizontal for easy understanding in relation to FIG. 1, but in the actual assembly work, the center line of the inner shaft 3 is set to be vertical. Then, the flange portion 3b of the inner shaft 3 is set downward.
[0029]
First, as shown by the arrow (1) in FIG. 2, the first seal device 8 is attached to the inner shaft 3. That is, the cylindrical portion 8a1 of the metal ring 8a of the first seal device 8 is fitted into the inner peripheral surface of the annular bulging portion 3j in the flange portion 3b of the inner shaft 3 by press fitting. At this time, the end portion on the vehicle inner side in the shaft portion 3a of the inner shaft 3 is cylindrical because it is not subjected to forging caulking.
[0030]
Thereafter, as shown by an arrow (2) in FIG. 2, an assembly in which the first row of tapered rollers 5 a is assembled in each pocket 6 a of the first cage 6 is assembled on the raceway portion 3 f of the inner shaft 3. At this time, as shown by the arrow (3) in FIG. 2, the tapered rollers 5a in the first row are moved radially outward by a predetermined gap existing between the pockets 6a of the first retainer 6. Thus, each tapered roller 5a is disposed on the track portion 3f so as to get over the small rod 3i of the inner shaft 3.
[0031]
Next, as shown by the arrow (4) in FIG. 2, by attaching the outer ring 2 from the vehicle inner side of the shaft part 3a of the inner shaft 3, the first track part 2a of the outer ring 2 is conical in the first row. The roller 5a is circumscribed, and is inserted into the inner periphery of the first seal device 8 so that the two seal lip portions 8b and 8c of the first seal device 8 are brought into contact with the outer peripheral surface of the outer ring 2 on the vehicle outer side.
[0032]
Further, after assembling the assembly in which the second row of tapered rollers 5b are assembled in the respective pockets 7a of the second cage 7 on the raceway portion 4a of the inner ring 4, these assemblies are indicated by the arrow (5) in FIG. As shown by, the second raceway portion 2b of the outer ring 2 and the small diameter portion 3g of the inner shaft 3 are inserted.
[0033]
Thereafter, forging is performed so that the end of the small-diameter portion 3g of the inner shaft 3 is widened outward in the radial direction. As a result, the inner ring 4 is integrally coupled to the inner shaft 3 and an axial force is applied to the inner ring 4.
[0034]
Finally, the tapered roller bearing device 1 shown in FIG. 1 is completed by mounting the second seal device 9 between the vehicle inner side end of the outer ring 2 and the large collar 4b of the inner ring 4.
[0035]
In the above assembling method, the step of assembling the assembly of the first cage 6 and the first row of tapered rollers 5a into the inner shaft 3 is, for example, between the first cage 6 and the first row of tapered rollers 5a. With the assembly placed below, the inner shaft 3 may be inserted from above, and thereafter, the assembly may be turned upside down.
[0036]
As described above, when assembling the tapered roller bearing device 1, the first seal device 8 is attached to the inner shaft 3 in a normal state, not temporarily assembled, and the outer ring 2 is attached to the inner shaft 3. Since the work can be performed, in the process of assembling the tapered roller bearing device 1, the handling of each member of the tapered roller bearing device 1 is facilitated, and the work can be easily performed, so that productivity is improved.
[0037]
Further, by disposing the first seal device 8 on the outer periphery of the outer ring 2, the volume of the annular space 10 sealed by the first seal device 8 and the second seal device 9 can be increased, and the grease sealed in this space 10. Can increase the amount. Moreover, although the grease sealed in the annular space 10 flows only around the tapered roller 5, the grease existing in the region from the first seal device 8 to the large end face of the first row of tapered rollers 5a in the annular space 10. Since the water is almost immobile, even if external water passes through the first sealing device 8 and enters the space 10, the water from the first sealing device 8 enters the first row. Only by mixing in the grease existing in the region up to the large end surface of the tapered roller 5a, it is not necessary to reach the region where the tapered roller 5a in the first row rolls. Therefore, the grease around the tapered roller 5a is prevented from deteriorating in the space 10, which can contribute to the improvement of the life of the tapered roller bearing device 1.
[0038]
Furthermore, since the annular recess 3k is provided on the base side of the flange portion 3b, it is designed so that the vehicle outer side end portion of the outer ring 2 is brought closer to the flange portion 3b side due to the axial recess of the annular recess 3k. Thus, the overall length of the tapered roller bearing device 1 can be shortened.
[0039]
Hereinafter, other examples of the present invention will be described.
[0040]
In the said embodiment, the 1st sealing apparatus 8 can be made into a type as shown, for example in FIG.3 and FIG.4. In the first sealing device 8 shown in FIG. 3, the outer seal lip portion 8b is triangular in the upper half cross section, and an elastic ring 8d called a garter spring is mounted on the outer periphery thereof. In the first sealing device 8 shown in FIG. 4, the inner seal lip portion 8c is inclined to the vehicle outer side, and a side seal lip portion 8e is provided outside the outer seal lip portion 8b. 8e is brought into contact with the base side of the inner surface of the flange portion 3b of the inner shaft 3 from the axial direction. If it is the 1st sealing apparatus 8 shown in FIG.3 and FIG.4, the merit regarding the assembly surface similar to the said embodiment can be acquired, and also sealing performance can be improved further compared with the thing of the said embodiment. In particular, in the first seal device 8 shown in FIG. 4, in the process of attaching the outer ring 2 to the inner shaft 3, the seal lip portion 8 c inside the first seal device 8 attached to the inner shaft 3 side is Since it is easy to incline toward the vehicle outer side by contacting the outer peripheral surface of the vehicle outer side, the inner seal lip portion 8c contacts the outer peripheral surface of the outer ring 2 in the proper state without being reversed in the reverse direction. It becomes like this.
[0041]
In the above embodiment, the cylindrical portion 8 a 1 of the metal ring 8 a of the first sealing device 8 may be fitted to the outer peripheral surface of the annular bulging portion 3 j of the inner shaft 3. However, also in this 1st sealing apparatus 8, each seal lip part is made into the contact form as demonstrated in the said embodiment.
[0042]
In the above embodiment, although not shown, a screw shaft portion is further formed on the small diameter side of the inner shaft 3, and a nut is screwed onto the screw shaft portion to fix the inner ring 4 to the inner shaft 3. It can be a form.
[0043]
In the tapered roller bearing device 1 shown in the above embodiment, the shape of the components other than the inner shaft 3 and the first seal device 8 is not particularly limited.
[0044]
The present invention can also be applied to a tapered roller bearing device of the type used to support drive wheels. Although not shown, this type of tapered roller bearing device has a structure in which a spline hole is provided in the center of the inner shaft 3 and a drive shaft is spline fitted to the spline hole.
[0045]
As shown in FIG. 5, the cylindrical surface 3m having the same diameter as the small diameter side portion of the track portion 3f is provided on the small diameter side of the track portion 3f of the inner shaft 3 without providing the small ridge 3i shown in the above embodiment. Can do. The cylindrical surface 3m may have a smaller diameter than the end portion on the small diameter side of the track portion 3f. In this case, there is an advantage in terms of manufacturing, such as easy processing when forming the raceway portion 3f of the inner shaft 3. Further, the inner ring 4 is also provided with a cylindrical surface 4d having the same diameter as that of the end portion on the small diameter side of the track portion 4a without providing the small flange 4c shown in the above embodiment on the small diameter side of the track portion 4a. In this case, at the stage indicated by the arrow (5) in FIG. 2, an assembly in which the second cage 7 is combined with the second row of tapered rollers 5b is inserted into the inner diameter side of the second raceway portion 2b of the outer ring 2. Then, the inner ring 4 can be incorporated between the inner diameter side of the second row of tapered rollers 5 b and the small diameter portion 3 g of the inner shaft 3.
[0046]
【The invention's effect】
In the present invention, when the tapered roller bearing device is assembled, each member constituting the tapered roller bearing device can be easily handled, and the tapered roller bearing device can be improved in productivity.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a tapered roller bearing device according to an embodiment of the present invention. FIG. 2 is a view showing an assembly procedure of the tapered roller bearing device shown in FIG. FIG. 4 is a view showing a main part of a tapered roller bearing device in another example. FIG. 4 is a view showing a main portion of a tapered roller bearing device in another example of the first seal device shown in FIG. FIG. 6 is a cross-sectional view showing a tapered roller bearing device according to another embodiment. FIG. 6 is a cross-sectional view showing a conventional tapered roller bearing device. FIG. 7 is an assembly process diagram used to explain a defect in the conventional example.
DESCRIPTION OF SYMBOLS 1 Tapered roller bearing apparatus 2 Outer ring 2a 1st track part of outer ring 2b 2nd track part of outer ring 3 Inner shaft 3a Inner shaft part 3b Inner shaft flange part 3f Inner shaft raceway part 3j Annular bulging part of flange part 3k Annular recess 4 in flange 4 Inner ring 4a Inner ring raceway 5a First row of tapered rollers 5b Second row of tapered rollers 6 First cage 7 Second cage 8 First seal device 8a Metal ring of first seal device 8b Outer seal lip portion 8c of the first seal device 8c Inner seal lip portion 9 of the first seal device Second seal device

Claims (3)

第１、第２軌道部を有する外輪と、
軸方向一端側に車輪取付用のフランジ部を有するとともに前記第１軌道部と対向する軌道部を有する内軸と、
この内軸の軸方向他端側の外周に外嵌装着されかつ前記第２軌道部と対向する軌道部を有する内輪と、
前記外輪の第１軌道部と前記内軸の軌道部との間に配置される第１列の円すいころおよび前記外輪の第２軌道部と前記内輪の軌道部との間に配置される第２列の円すいころと、
前記各列の円すいころを円周方向に等配保持する保持器とを備えた車輪用の円すいころ軸受装置において、
前記フランジ部の前記外輪側の面に、前記外輪の外周面における前記フランジ部寄りの領域を所定隙間を介して覆う環状膨出部が設けられており、
前記環状膨出部に取り付けられる環状の胴体部と、この胴体部から径方向内方に延びて前記外輪の軸方向一端側の外周面に摺接するシールリップ部とを有するシール装置を備えた、ことを特徴とする車輪用の円すいころ軸受装置。An outer ring having first and second track portions;
An inner shaft having a wheel mounting flange on one end side in the axial direction and having a track portion facing the first track portion;
An inner ring having a track portion that is externally fitted to the outer periphery of the other end side in the axial direction of the inner shaft and that faces the second track portion;
A first row of tapered rollers disposed between the first raceway portion of the outer ring and the raceway portion of the inner shaft, and a second row disposed between the second raceway portion of the outer ring and the raceway portion of the inner ring. Conical rollers in a row,
In the tapered roller bearing device for a wheel provided with a cage for equally holding the tapered rollers in each row in the circumferential direction,
An annular bulging portion that covers a region near the flange portion on the outer peripheral surface of the outer ring via a predetermined gap is provided on the outer ring side surface of the flange portion,
A seal device having an annular body portion attached to the annular bulge portion, and a seal lip portion extending radially inward from the body portion and in sliding contact with an outer peripheral surface on one axial end side of the outer ring; A tapered roller bearing device for wheels. 請求項１に記載の車輪用の円すいころ軸受装置において、前記フランジ部の前記外輪側の面において前記環状膨出部よりも径方向内方に、環状窪みが設けられている、車輪用の円すいころ軸受装置。The tapered roller bearing device for a wheel according to claim 1, wherein an annular recess is provided radially inward of the surface on the outer ring side of the flange portion with respect to the annular bulging portion. Roller bearing device. 請求項１または２に記載の車輪用の円すいころ軸受装置を組み立てる方法であって、
前記シール装置を前記内軸の環状膨出部に取り付ける工程と、
前記第１列の円すいころおよび前記保持器を前記内軸の軌道部上に組み込む工程と、
前記内軸の軸方向他端側から前記外輪を装着することにより、この外輪の第１軌道部を前記第１列の円すいころに外接させるとともに、前記外輪の軸方向一端部を前記シール装置のシールリップ部の内周に差し入れる工程とを有する、ことを特徴とする車輪用の円すいころ軸受装置の組立方法。A method for assembling a tapered roller bearing device for a wheel according to claim 1 or 2,
Attaching the sealing device to the annular bulging portion of the inner shaft;
Incorporating the first row of tapered rollers and the cage onto the raceway of the inner shaft;
By mounting the outer ring from the other axial end side of the inner shaft, the first race part of the outer ring is circumscribed to the first row of tapered rollers, and one axial end part of the outer ring is connected to the sealing device. A method of assembling a tapered roller bearing device for a wheel, comprising a step of inserting the seal lip portion into an inner periphery of the seal lip portion.
JP2003200917A 2003-07-24 2003-07-24 Tapered roller bearing device for wheel and method of assembling the same Expired - Fee Related JP4321154B2 (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007162847A (en) * 2005-12-14 2007-06-28 Ntn Corp Bearing system for wheel
CN103032474A (en) * 2012-12-28 2013-04-10 瓦房店轴承集团有限责任公司 High-temperature bearing and seal assembly thereof
CN108715188A (en) * 2018-06-25 2018-10-30 浙江工业大学 The double baffle-type dtc signal acquisition device of the short spring of single layer
JP2018204699A (en) * 2017-06-05 2018-12-27 日本精工株式会社 Hub unit bearing
CN111373167A (en) * 2017-12-15 2020-07-03 舍弗勒技术股份两合公司 Sealing device for wheel bearing
CN116203222A (en) * 2023-05-05 2023-06-02 湖南艾荻迩医疗科技有限公司 Blood detects uses equipment, analysis appearance and nutrition monitoring system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007162847A (en) * 2005-12-14 2007-06-28 Ntn Corp Bearing system for wheel
JP4739003B2 (en) * 2005-12-14 2011-08-03 Ｎｔｎ株式会社 Assembly method for wheel bearing device
CN103032474A (en) * 2012-12-28 2013-04-10 瓦房店轴承集团有限责任公司 High-temperature bearing and seal assembly thereof
JP2018204699A (en) * 2017-06-05 2018-12-27 日本精工株式会社 Hub unit bearing
CN111373167A (en) * 2017-12-15 2020-07-03 舍弗勒技术股份两合公司 Sealing device for wheel bearing
CN111373167B (en) * 2017-12-15 2021-12-07 舍弗勒技术股份两合公司 Sealing device for wheel bearing
US11193543B2 (en) 2017-12-15 2021-12-07 Schaeffler Technologies AG & Co. KG Sealing arrangement for a wheel bearing
CN108715188A (en) * 2018-06-25 2018-10-30 浙江工业大学 The double baffle-type dtc signal acquisition device of the short spring of single layer
CN108715188B (en) * 2018-06-25 2023-05-30 浙江工业大学 Single-layer short spring double-baffle type torque signal acquisition device
CN116203222A (en) * 2023-05-05 2023-06-02 湖南艾荻迩医疗科技有限公司 Blood detects uses equipment, analysis appearance and nutrition monitoring system

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