JP4691851B2 - Axle bearing device - Google Patents

Axle bearing device Download PDF

Info

Publication number
JP4691851B2
JP4691851B2 JP2001239301A JP2001239301A JP4691851B2 JP 4691851 B2 JP4691851 B2 JP 4691851B2 JP 2001239301 A JP2001239301 A JP 2001239301A JP 2001239301 A JP2001239301 A JP 2001239301A JP 4691851 B2 JP4691851 B2 JP 4691851B2
Authority
JP
Japan
Prior art keywords
ring member
outer ring
bearing device
peripheral surface
axle bearing
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.)
Expired - Fee Related
Application number
JP2001239301A
Other languages
Japanese (ja)
Other versions
JP2003049852A (en
Inventor
孝爾 嶋
順司 村田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JTEKT Corp
Original Assignee
JTEKT Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by JTEKT Corp filed Critical JTEKT Corp
Priority to JP2001239301A priority Critical patent/JP4691851B2/en
Publication of JP2003049852A publication Critical patent/JP2003049852A/en
Application granted granted Critical
Publication of JP4691851B2 publication Critical patent/JP4691851B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7873—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section
    • F16C33/7876—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a single sealing ring of generally L-shaped cross-section with sealing lips
    • 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
    • F16C19/187—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 all four raceways integrated on parts other than race rings, e.g. fourth 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
    • F16C19/181—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact
    • F16C19/183—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement
    • F16C19/186—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement with three raceways provided integrally on parts other than race rings, e.g. third generation hubs
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/02—Wheel hubs or castors

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing Of Bearings (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、車軸用軸受装置、特にそのシール構造に関する。
【０００２】
【従来の技術】
図６および図７に、従来の車軸用軸受装置１の構成を示す。これは、車体側に非回転に支持される筒状外輪部材１０と、この筒状外輪部材１０に転動体としての玉８，９を介して軸心２１回りに回転自在に支持されるハブホイール（内輪部材）４とを有している。
【０００３】
このハブホイール４の、筒状外輪部材１０から車両アウタ側Ａに突出した部分の外周面には、図示しないブレーキディスクロータおよびホイール部材を取付けるためのハブフランジ２が、径方向外向きに突出して形成されている。
【０００４】
また、ハブホイール４の車両インナ側Ｂ外周面には、ハブホイール４とは別部材の内輪部材３が一体的に嵌着され、前記一方列の玉８はハブホイール４の外周面を内輪軌道面とし、他方列の玉９は内輪部材３の外周面を内輪軌道面とし、筒状外輪部材１０の内周面を共通の外輪軌道面としている。
【０００５】
そして、前記筒状外輪部材１０とハブホイール４および内輪部材３との間の環状軸受空間を、車両インナ側Ｂおよび車両アウタ側Ａで密封するためのシール部材が設けられ、一方（車両インナ側Ｂ）のシール部材（パックシール）５は、筒状外輪部材１０の内周面に嵌着された芯金１３と、この芯金１３に固定された弾性シール体３７と、前記内輪部材３の外周面に嵌着されて弾性シール体３７のリップが接触する金環１７とから構成されている。
【０００６】
他方のシール部材１８は筒状外輪部材１０の内周面に嵌着された芯金１９と、この芯金１９に固定された弾性シール体２０とから構成され、この弾性シール体２０は、前記ハブホイール４の外周面に接触するラジアルリップ３０と、前記ハブフランジ２の側面に接触するアキシャルリップ３１とを有している。
【０００７】
【発明が解決しようとする課題】
上記従来の車軸用軸受装置１において、他方のシール部材１８は、弾性シール体２０のアキシャルリップ３１が径方向外向きに突出したハブフランジ２の側面に接触するよう構成されているため、筒状外輪部材１０の外周面に付着した泥水等が筒状外輪部材１０の端面を伝ってアキシャルリップ３１側に流れて泥水等がハブフランジ２と弾性シール体２０との間に溜まり易く、シール部材５のシール性低下の原因となっていた。
【０００８】
そこで本発明は、上記課題を解決し得る車軸用軸受装置の提供を目的とする。
【０００９】
【課題を解決するための手段】
本発明における課題解決手段は、車体側に非回転に取付けられる外輪部材と、この外輪部材に転動体を介して軸心回りに回転可能に支持される内輪部材とを備え、この内輪部材の、前記外輪部材から軸心方向に突出した部分の外周面に、径方向外向きに突出形成されて車輪を取付けるための取付けフランジが形成され、前記外輪部材と内輪部材との間の環状軸受空間を、前記取付けフランジ側で密封するためのシール部材が設けられた車軸用軸受装置において、前記シール部材は、外輪部材の内周面に嵌着される芯金と、この芯金に取付けられて前記取付けフランジの側面に接触するリップを有する弾性シール体とを備え、前記外輪部材の取付けフランジ側の端部に、外輪部材の外周面から上方に突出して水分が取付けフランジの側面と弾性シール体との間に流れ込むのを防止するための堰部材が前記軸心より上方にのみ取付けられ、前記芯金は、前記外輪部材の端面であって前記取付けフランジの径方向側面側の端面と密着している。
【００１０】
また前記堰部材が、芯金に一体的に形成され、あるいは堰部材が軸心に対する径方向に沿って配置され、あるいは堰部材が径方向に対して傾斜している。
【００１１】
上記構成のように、外輪部材の取付けフランジ側の端部に、外輪部材の外周面から上方に突出する堰部材を設けることにより、この堰部材により、外輪部材の外周面に付着した泥水等が取付けフランジの側面と弾性シール体との間に流れ込むのを防止して、シール部材のシール性を維持する。
【００１２】
また、堰部材と取付けフランジの側面との間にラビリンス用隙間が配置された構成によれば、泥水等が取付けフランジの側面と弾性シール体との間に流れ込むのを確実に防止する。
【００１３】
【発明の実施の形態】
以下、本発明の実施の形態に係る車軸用軸受装置を、図１ないし図３に基づいて説明する。図１に示すように、本発明の実施の形態に係る車軸用軸受装置１は、車体側にナックルを介して非回転に取付けられる単一の筒状外輪部材１０を有し、この筒状外輪部材１０の内周面を外輪軌道面として保持器２０に円周等配位置に保持された複列の玉（転動体の一例で、複列アンギュラ玉軸受が用いられる）８，９を介して、図示しないブレーキディスクロータおよびホイール部材（車輪）を取付けるためのハブホイール４（一方の内輪部材に相当する）およびこのハブホイール４に一体的に取付けられる、後述の等速ジョイント６の椀形外輪部材７（他方の内輪部材に相当する）とが軸心２１回りに回転自在に支持されている。
【００１４】
前記一方列の玉８の内輪軌道面としてハブホイール４の外周面が用いられ、他方列の玉９の内輪軌道面として椀形外輪部材７の外周面がそれぞれ用いられ、筒状外輪部材１０の内周面が各列の玉８，９の共通の外輪軌道面として用いられる。なお、前記筒状外輪部材１０はその外周面に径方向外向きに突出する取付けフランジ２２が形成され、この取付けフランジ２２が前記ナックルに固定される。
【００１５】
前記ハブホイール４の、筒状外輪部材１０から軸心方向（車両アウタ側Ａ）に突出した部分の外周面には、径方向外向きに突出するハブフランジ２（車輪を取付けるための取付けフランジに相当する）が形成され、このハブフランジ２には、前記ブレーキディスクロータが重ねて固定され、このハブフランジ２には、ホイール部材を固定するためのハブボルト２３が圧入されている。
【００１６】
前記椀形外輪部材７は、その車両アウタ側Ａに、前記ハブホイール４の中心に形成した挿通穴２４にスプライン嵌合する中空状の軸部２５が一体的に形成され、この軸部２５の車両アウタ側Ａ端部がかしめられて、これにより軸部２５とハブホイール４とが軸心２１回りに一体的に回転可能な構成となっている。
【００１７】
前記等速ジョイント６は、ツェッパタイプ（バーフィールド型）と呼ばれるものが用いられており、前記椀形外輪部材７と、その内部に、駆動シャフト２６の端部を挿通固定した内輪部２７、前記ハブホイール４を駆動シャフト２６に対して傾動案内するための玉２８、およびその保持器２９を備えている。
【００１８】
次に、上記車軸用軸受装置１におけるシール構造１１，１２を説明する。まず、前記筒状外輪部材１０と等速ジョイント６の椀形外輪部材７との間の隙間をシールするための一方のシール構造１１は、筒状外輪部材１０の内周面に嵌着された芯金１４と、この芯金１４に固定されて、椀形外輪部材７の外周曲面に３箇所で接触するリップ部３６を有する弾性シール体４３とを有し、前記芯金１４は軸心方向（車両インナ側Ｂ）に延長された延長部４０が形成され、また、シール構造１１は、椀形外輪部材７の外周面に嵌着されて前記延長部４０を囲繞することで延長部４０との間でラビリンス用隙間を形成する断面コ字形の環体４１を有している。
【００１９】
次に、前記筒状外輪部材１０のとハブホイール４との間の隙間をハブフランジ２側でシールするための他方のシール構造１２の説明をすると、これは、ハブフランジ２の筒状外輪部材１０側の径方向側面２ａと、筒状外輪部材１０の内周面に嵌着された芯金１３と、この芯金１３に固定された弾性シール体３７とから構成されている。この弾性シール体３７は、前記ハブフランジ２の筒状外輪部材１０側の径方向側面２ａにアキシャル方向で接触する二個のアキシャルリップ部１５と、前記ハブホイール４の外周面にラジアル方向で接触するラジアルリップ部３５とを有している。
【００２０】
また、前記芯金１３には、径方向側面２ａに沿って一部が筒状外輪部材１０の外周面１０ａから上方に径方向外向きに突出するよう延長された円弧状（三日月状）の堰部材１３ａが形成され、この堰部材１３ａは筒状外輪部材１０の、径方向側面２ａ側の端面に密着している。さらに、この堰部材１３ａは、軸心２１より上方にのみ形成されている。
【００２１】
上記構成において、例えば車両の走行中に筒状外輪部材１０に泥水がかかった場合、他方のシール構造１２において、芯金１３の一部には、筒状外輪部材１０の外周面から上方に径方向外向きに突出するよう延長された堰部材１３ａが形成されているので、泥水はこの堰部材１３ａによって筒状外輪部材１０とハブフランジ２の径方向側面２ａへ流れるのが防止される。従って、アキシャルリップ１５部分に筒状外輪部材１０の泥水等が流れてたまることがなく、他方のシール構造１１におけるシール性を維持することができる。
【００２２】
なお、上記実施の形態では、芯金１３を筒状外輪部材１０側の径方向側面２ａに沿って筒状外輪部材１０の外周面から上方に径方向外向きに突出するよう延長することで堰部材１３ａを形成したが、本発明は上記実施の形態に限定されるものではなく、例えば図４に示すように、堰部材１３ａを径方向に対して車両インナ側Ｂに傾斜させるよう形成してもよい。
【００２３】
この場合は筒状外輪部材１０上の泥水が弾性シール体３７の方へ流れるのを押し返すように働くので、より確実に泥水を筒状外輪部材１０とハブフランジ２の径方向側面２ａの間に流れるのを抑え、シール構造１２におけるシール性を維持することができる。他の部分の構成は上記実施の形態と同様であるのでその説明を省略する。
【００２４】
また図５に示すように、堰部材１３ａを径方向に対して車両アウタ側Ａに傾斜させるよう形成してもよい。この場合は、上記各実施の形態に比べて堰部材１３ａとハブフランジ２の径方向側面２ａとの間の距離αが狭くなり、この距離αをラビリンス作用が発生するような距離に設定することにより、シール構造１２のシール性を向上させることができる。他の構成は上記実施の形態と同様であるので、その説明を省略する。
【００２６】
また上記実施の形態では、車軸用軸受装置１として、筒状外輪部材１０の内方に複列の玉８，９を介して、ハブホイール４およびこのハブホイール４に一体的に結合した等速ジョイント６の椀形外輪部材７を、軸心２１回りに回転自在とした構成のものに対して上記構成のシール構造１２を適用させた例を示したが、これに限定されるものではなく、例えば図６の従来例で示したような、筒状外輪部材１０に玉８，９を介して軸心２１回りに回転自在に支持されるハブホイール４を有し、このハブホイール４の車両インナ側Ｂにハブホイール４とは別部材の内輪部材３を嵌着し、一方列の玉８の内輪軌道面をハブホイール４の外周面とし、他方列の玉９の内輪軌道面を前記内輪部材３の外周面とするタイプの車軸用軸受装置１のシール構造としても適用でき、この場合も上記各実施の形態と同様の作用効果を奏し得る。
【００２７】
【発明の効果】
以上の説明から明らかな通り、本発明は、外輪部材と内輪部材との間の環状軸受空間を取付けフランジ側で密封するためのシール部材に、外輪部材の外周面から上方に突出して水分が取付けフランジの側面とシール部材の弾性シール体との間に流れ込むのを防止するための堰部材が取付けられたので、外輪部材の外周面に付着した水（泥水）が取付けフランジの側面と弾性シール体との間に流れ込むのを防止して、シール部材のシール性を維持することができる。
【図面の簡単な説明】
【図１】本発明の実施の形態を示す車軸用軸受装置の全体構成を示す断面図である。
【図２】同じく要部拡大断面図である。
【図３】同じく図１におけるＣ−Ｃ線矢視図である。
【図４】別の実施の形態を示す要部拡大断面図である。
【図５】さらに別の実施の形態を示す要部拡大断面図である。
【図６】従来の車軸用軸受装置の全体構成を示す断面図である。
【図７】同じく要部拡大断面図である。
【符号の説明】
１車軸用軸受装置
２ａハブフランジ（取付けフランジ）
４ハブホイール
７椀形外輪部材
１０筒状外輪部材
１２シール構造
１３芯金
１３ａ堰部材
１５アキシャルリップ
３７弾性シール体
３５ラジアルリップ部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an axle bearing device, and more particularly to a seal structure thereof.
[0002]
[Prior art]
6 and 7 show the configuration of a conventional axle bearing device 1. This is a cylindrical outer ring member 10 that is non-rotatably supported on the vehicle body side, and a hub wheel that is supported by the cylindrical outer ring member 10 so as to be rotatable about an axis 21 via balls 8 and 9 as rolling elements. (Inner ring member) 4.
[0003]
A hub flange 2 for mounting a brake disk rotor and a wheel member (not shown) protrudes radially outward on the outer peripheral surface of a portion of the hub wheel 4 protruding from the cylindrical outer ring member 10 to the vehicle outer side A. Is formed.
[0004]
An inner ring member 3, which is a member different from the hub wheel 4, is integrally fitted to the outer peripheral surface of the vehicle inner side B of the hub wheel 4, and the balls 8 in the one row are arranged on the outer ring surface of the hub wheel 4. The balls 9 in the other row have the outer peripheral surface of the inner ring member 3 as an inner ring raceway surface and the inner peripheral surface of the cylindrical outer ring member 10 as a common outer ring raceway surface.
[0005]
A seal member is provided for sealing the annular bearing space between the cylindrical outer ring member 10 and the hub wheel 4 and the inner ring member 3 at the vehicle inner side B and the vehicle outer side A, and one (vehicle inner side) The seal member (pack seal) 5 of B) includes a cored bar 13 fitted to the inner peripheral surface of the cylindrical outer ring member 10, an elastic seal body 37 fixed to the cored bar 13, and the inner ring member 3. It is comprised from the metal ring 17 which is fitted by the outer peripheral surface and the lip of the elastic seal body 37 contacts.
[0006]
The other seal member 18 includes a cored bar 19 fitted on the inner peripheral surface of the cylindrical outer ring member 10 and an elastic seal body 20 fixed to the cored bar 19. A radial lip 30 that contacts the outer peripheral surface of the hub wheel 4 and an axial lip 31 that contacts the side surface of the hub flange 2 are provided.
[0007]
[Problems to be solved by the invention]
In the conventional axle bearing device 1 described above, the other seal member 18 is configured so that the axial lip 31 of the elastic seal body 20 contacts the side surface of the hub flange 2 projecting radially outward. The muddy water or the like adhering to the outer peripheral surface of the outer ring member 10 flows along the end face of the cylindrical outer ring member 10 to the axial lip 31 side, and the muddy water or the like tends to accumulate between the hub flange 2 and the elastic seal body 20. It was a cause of deterioration of the sealing performance.
[0008]
Then, this invention aims at provision of the bearing apparatus for axles which can solve the said subject.
[0009]
[Means for Solving the Problems]
The problem-solving means in the present invention includes an outer ring member that is non-rotatably attached to the vehicle body side, and an inner ring member that is supported by the outer ring member so as to be rotatable about a shaft center via a rolling element. On the outer peripheral surface of the portion protruding in the axial direction from the outer ring member, a mounting flange for mounting a wheel is formed to protrude radially outward, and an annular bearing space between the outer ring member and the inner ring member is formed. In the axle bearing device provided with the seal member for sealing on the mounting flange side, the seal member is attached to the inner peripheral surface of the outer ring member and the core metal is attached to the core metal. An elastic seal body having a lip that contacts the side surface of the mounting flange, and protrudes upward from the outer peripheral surface of the outer ring member at the end of the outer ring member on the mounting flange side, so that moisture is elastic with the side surface of the mounting flange. Over weir member for preventing the flow between Le body is mounted only above said axis, said core metal, the end face of the radial side of the mounting flange a an end face of the outer ring member It is in close contact with.
[0010]
Further, the dam member is formed integrally with the metal core, or the dam member is disposed along the radial direction with respect to the shaft center, or the dam member is inclined with respect to the radial direction.
[0011]
By providing a dam member protruding upward from the outer peripheral surface of the outer ring member at the end of the outer ring member on the mounting flange side as in the above configuration, muddy water or the like attached to the outer peripheral surface of the outer ring member by this dam member. The seal member is prevented from flowing between the side surface of the mounting flange and the elastic seal body, and the sealing performance of the seal member is maintained.
[0012]
Further, according to the configuration labyrinth for clearance is disposed between the side surface of the dam member and the mounting flange, it reliably prevented from flowing between the side surface and the elastic seal member in the flange muddy water or the like is attached.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EMBODIMENTS Hereinafter, an axle bearing device according to an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, an axle bearing device 1 according to an embodiment of the present invention has a single cylindrical outer ring member 10 that is non-rotatably attached to a vehicle body via a knuckle, and this cylindrical outer ring. Via double-row balls (an example of a rolling element, a double-row angular ball bearing is used) 8 and 9 held on the cage 20 at circumferentially equidistant positions with the inner circumferential surface of the member 10 as the outer ring raceway surface A hub wheel 4 (corresponding to one inner ring member) for mounting a brake disk rotor and a wheel member (wheel) (not shown), and a saddle-shaped outer ring of a constant velocity joint 6 described later, which is integrally mounted on the hub wheel 4 A member 7 (corresponding to the other inner ring member) is supported so as to be rotatable around the axis 21.
[0014]
The outer peripheral surface of the hub wheel 4 is used as the inner ring raceway surface of the balls 8 in the one row, and the outer peripheral surface of the bowl-shaped outer ring member 7 is used as the inner ring raceway surface of the balls 9 in the other row. The inner peripheral surface is used as a common outer ring raceway surface for the balls 8 and 9 in each row. The cylindrical outer ring member 10 is formed with a mounting flange 22 projecting radially outward on the outer peripheral surface thereof, and the mounting flange 22 is fixed to the knuckle.
[0015]
On the outer peripheral surface of a portion of the hub wheel 4 that protrudes in the axial direction (vehicle outer side A) from the cylindrical outer ring member 10, a hub flange 2 that protrudes radially outward (to a mounting flange for mounting a wheel). The brake disc rotor is overlapped and fixed to the hub flange 2, and a hub bolt 23 for fixing the wheel member is press-fitted into the hub flange 2.
[0016]
In the saddle-shaped outer ring member 7, a hollow shaft portion 25 that is spline-fitted into an insertion hole 24 formed in the center of the hub wheel 4 is integrally formed on the vehicle outer side A. The end portion A of the vehicle outer side is caulked so that the shaft portion 25 and the hub wheel 4 can rotate integrally around the shaft center 21.
[0017]
The constant velocity joint 6 uses what is called a Rzeppa type (Burfield type), the saddle-shaped outer ring member 7, an inner ring part 27 in which an end of a drive shaft 26 is inserted and fixed, and the hub A ball 28 for tilting and guiding the wheel 4 with respect to the drive shaft 26 and a retainer 29 thereof are provided.
[0018]
Next, the seal structures 11 and 12 in the axle bearing device 1 will be described. First, one seal structure 11 for sealing a gap between the cylindrical outer ring member 10 and the bowl-shaped outer ring member 7 of the constant velocity joint 6 was fitted to the inner peripheral surface of the cylindrical outer ring member 10. It has a metal core 14 and an elastic seal body 43 that is fixed to the metal core 14 and has lip portions 36 that come into contact with the outer peripheral curved surface of the bowl-shaped outer ring member 7 at three locations. An extension portion 40 extended to (vehicle inner side B) is formed, and the seal structure 11 is fitted to the outer peripheral surface of the bowl-shaped outer ring member 7 to surround the extension portion 40, thereby extending the extension portion 40. An annular body 41 having a U-shaped cross section that forms a labyrinth gap therebetween.
[0019]
Next, the other seal structure 12 for sealing the gap between the tubular outer ring member 10 and the hub wheel 4 on the hub flange 2 side will be described. This is the tubular outer ring member of the hub flange 2. It is composed of a radial side surface 2 a on the 10 side, a core metal 13 fitted to the inner peripheral surface of the cylindrical outer ring member 10, and an elastic seal body 37 fixed to the core metal 13. The elastic seal body 37 is in radial contact with the two axial lip portions 15 that contact the radial side surface 2a of the hub flange 2 on the cylindrical outer ring member 10 side in the axial direction, and the outer peripheral surface of the hub wheel 4 in the radial direction. And a radial lip portion 35.
[0020]
In addition, the cored bar 13 has an arc-shaped (crescent-shaped) weir that is partially extended along the radial side surface 2 a so as to protrude radially outward from the outer peripheral surface 10 a of the cylindrical outer ring member 10. A member 13a is formed, and the dam member 13a is in close contact with the end surface of the cylindrical outer ring member 10 on the radial side surface 2a side. Further, the dam member 13 a is formed only above the axis 21.
[0021]
In the above configuration, for example, when muddy water is applied to the cylindrical outer ring member 10 during traveling of the vehicle, a part of the core metal 13 has a diameter upward from the outer peripheral surface of the cylindrical outer ring member 10 in the other seal structure 12. Since the dam member 13a extended so as to protrude outward in the direction is formed, the muddy water is prevented from flowing to the cylindrical outer ring member 10 and the radial side surface 2a of the hub flange 2 by the dam member 13a. Accordingly, the muddy water or the like of the cylindrical outer ring member 10 does not flow through the axial lip 15 and the sealing performance of the other seal structure 11 can be maintained.
[0022]
In the embodiment described above, the dam 13 is extended by protruding the cored bar 13 from the outer peripheral surface of the cylindrical outer ring member 10 upward and radially outward along the radial side surface 2a on the cylindrical outer ring member 10 side. Although the member 13a is formed, the present invention is not limited to the above embodiment. For example, as shown in FIG. 4, the dam member 13a is formed to be inclined toward the vehicle inner side B with respect to the radial direction. Also good.
[0023]
In this case, the muddy water on the cylindrical outer ring member 10 works so as to push back the flow toward the elastic seal body 37, so that the muddy water is more reliably disposed between the cylindrical outer ring member 10 and the radial side surface 2 a of the hub flange 2. It is possible to suppress the flow and maintain the sealing performance in the seal structure 12. Since the configuration of other parts is the same as that of the above embodiment, the description thereof is omitted.
[0024]
Further, as shown in FIG. 5, the weir member 13a may be formed to be inclined toward the vehicle outer side A with respect to the radial direction. In this case, the distance α between the weir member 13a and the radial side surface 2a of the hub flange 2 is narrower than that in each of the above embodiments, and the distance α is set to such a distance that the labyrinth action occurs. Thereby, the sealing performance of the seal structure 12 can be improved. Since other configurations are the same as those of the above embodiment, the description thereof is omitted.
[0026]
Further, in the above-described embodiment, the axle bearing device 1 is the constant velocity integrally coupled to the hub wheel 4 and the hub wheel 4 via the double rows of balls 8 and 9 inside the cylindrical outer ring member 10. Although the example in which the seal structure 12 having the above-described configuration is applied to the configuration in which the saddle-shaped outer ring member 7 of the joint 6 is configured to be rotatable around the axis 21 is not limited thereto, For example, as shown in the conventional example of FIG. 6, a cylindrical outer ring member 10 has a hub wheel 4 rotatably supported around a shaft center 21 via balls 8 and 9. The inner ring member 3, which is a member different from the hub wheel 4, is fitted to the side B, the inner ring raceway surface of the ball 8 in one row is the outer peripheral surface of the hub wheel 4, and the inner ring raceway surface of the ball 9 in the other row is the inner ring member. 3 is a seal structure of an axle bearing device 1 of the type having an outer peripheral surface. It is applicable, even in this case can achieve effects similar to the above embodiments.
[0027]
【The invention's effect】
As is apparent from the above description, the present invention attaches moisture to the seal member for sealing the annular bearing space between the outer ring member and the inner ring member on the mounting flange side so as to protrude upward from the outer peripheral surface of the outer ring member. Since a weir member for preventing inflow between the side surface of the flange and the elastic seal body of the seal member is attached, water (muddy water) adhering to the outer peripheral surface of the outer ring member is attached to the side surface of the flange and the elastic seal body. And the sealing performance of the seal member can be maintained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an overall configuration of an axle bearing device according to an embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of the main part of the same.
FIG. 3 is a view taken along the line CC in FIG.
FIG. 4 is an enlarged cross-sectional view of a main part showing another embodiment.
FIG. 5 is an enlarged cross-sectional view of a main part showing still another embodiment.
FIG. 6 is a cross-sectional view showing an overall configuration of a conventional axle bearing device.
FIG. 7 is an enlarged cross-sectional view of the main part of the same.
[Explanation of symbols]
1 axle bearing device 2a hub flange (mounting flange)
4 Wan hub wheel 7 shaped outer ring member 10 cylindrical outer ring member 12 sealing structure 13 the core metal 13a weir member 15 Axial liter flop
3 7 Elastic seal body 35 Radial lip

Claims (5)

車体側に非回転に取付けられる外輪部材と、この外輪部材に転動体を介して軸心回りに回転可能に支持される内輪部材とを備え、この内輪部材の、前記外輪部材から軸心方向に突出した部分の外周面に、径方向外向きに突出形成されて車輪を取付けるための取付けフランジが形成され、前記外輪部材と内輪部材との間の環状軸受空間を、前記取付けフランジ側で密封するためのシール部材が設けられた車軸用軸受装置において、
前記シール部材は、外輪部材の内周面に嵌着される芯金と、この芯金に取付けられて前記取付けフランジの側面に接触するリップを有する弾性シール体とを備え、前記外輪部材の取付けフランジ側の端部に、外輪部材の外周面から上方に突出して水分が取付けフランジの側面と弾性シール体との間に流れ込むのを防止するための堰部材が前記軸心より上方にのみ取付けられ、前記芯金は、前記外輪部材の端面であって前記取付けフランジの径方向側面側の端面と密着していることを特徴とする車軸用軸受装置。An outer ring member that is non-rotatably attached to the vehicle body side, and an inner ring member that is supported by the outer ring member so as to be rotatable around an axis through a rolling element, the inner ring member extending axially from the outer ring member A mounting flange for mounting a wheel is formed on the outer peripheral surface of the protruding portion so as to protrude radially outward, and an annular bearing space between the outer ring member and the inner ring member is sealed on the mounting flange side. In an axle bearing device provided with a seal member for
The seal member includes a metal core fitted to the inner peripheral surface of the outer ring member, and an elastic seal body having a lip attached to the metal core and contacting a side surface of the attachment flange. A dam member for preventing the moisture from flowing between the side surface of the mounting flange and the elastic seal body by protruding upward from the outer peripheral surface of the outer ring member is attached only to the end on the flange side above the shaft center. The axle is a bearing device for an axle, wherein the core bar is in close contact with an end face of the outer ring member, which is a radial side face side of the mounting flange. 堰部材が芯金に一体的に形成されたことを特徴とする請求項１記載の車軸用軸受装置。  2. The axle bearing device according to claim 1, wherein the weir member is formed integrally with the cored bar. 堰部材が軸心に対する径方向に沿って配置されたことを特徴とする請求項１または請求項２記載の車軸用軸受装置。  3. The axle bearing device according to claim 1, wherein the weir member is disposed along a radial direction with respect to the shaft center. 堰部材が径方向に対して傾斜したことを特徴とする請求項１または請求項２記載の車軸用軸受装置。  3. The axle bearing device according to claim 1, wherein the weir member is inclined with respect to the radial direction. 堰部材と取付けフランジの側面との間にラビリンス用隙間が配置されたことを特徴とする請求項１ないし請求項４の何れかに記載の車軸用軸受装置。  The axle bearing device according to any one of claims 1 to 4, wherein a labyrinth gap is disposed between the weir member and the side surface of the mounting flange.
JP2001239301A 2001-08-07 2001-08-07 Axle bearing device Expired - Fee Related JP4691851B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2001239301A JP4691851B2 (en) 2001-08-07 2001-08-07 Axle bearing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001239301A JP4691851B2 (en) 2001-08-07 2001-08-07 Axle bearing device

Publications (2)

Publication Number Publication Date
JP2003049852A JP2003049852A (en) 2003-02-21
JP4691851B2 true JP4691851B2 (en) 2011-06-01

Family

ID=19070073

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2001239301A Expired - Fee Related JP4691851B2 (en) 2001-08-07 2001-08-07 Axle bearing device

Country Status (1)

Country Link
JP (1) JP4691851B2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4507734B2 (en) * 2004-07-22 2010-07-21 日本精工株式会社 Rolling bearing unit for wheel support
JP4571467B2 (en) * 2004-09-22 2010-10-27 富士重工業株式会社 Vehicle bearing device
JP5376211B2 (en) * 2008-08-08 2013-12-25 株式会社ジェイテクト Rolling bearing device
WO2011037183A1 (en) * 2009-09-25 2011-03-31 Ntn株式会社 Bearing device for a wheel
JP5541909B2 (en) * 2009-12-03 2014-07-09 Ｎｔｎ株式会社 Wheel bearing device
JP5836584B2 (en) 2010-11-02 2015-12-24 Ntn株式会社 Wheel bearing device
ITTO20110697A1 (en) * 2011-07-29 2013-01-30 Skf Ab PROTECTIVE SHIELD FOR OMOCINETIC JOINTS AND UNIT WHEEL BEARING-SHORTCUT JOINT WITH SUCH A PROTECTION SCREEN
JP6384036B2 (en) * 2013-10-23 2018-09-05 株式会社ジェイテクト Wheel bearing device
JP6201769B2 (en) * 2014-01-15 2017-09-27 日本精工株式会社 Rolling bearing unit for seal ring and wheel support with seal ring
JP6920034B2 (en) * 2016-08-15 2021-08-18 Nok株式会社 Sealing device
CN107917137A (en) * 2017-12-12 2018-04-17 洛阳新能轴承制造有限公司 A kind of water proof type pitch variable bearings

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61134404U (en) * 1985-02-13 1986-08-21
JPS61142964U (en) * 1985-02-26 1986-09-03
JPS631922U (en) * 1986-06-23 1988-01-08
JP2513750Y2 (en) * 1989-07-20 1996-10-09 日本精工株式会社 Hub unit cap and hub unit for automobile axle
JP2601238Y2 (en) * 1993-11-30 1999-11-15 エヌティエヌ株式会社 Sealing device for wheel bearings

Also Published As

Publication number Publication date
JP2003049852A (en) 2003-02-21

Similar Documents

Publication Publication Date Title
WO2005116471A1 (en) Vehicle bearing device
JP4691851B2 (en) Axle bearing device
JP2005147298A (en) Bearing device for wheel
JP2013072553A (en) Rolling bearing unit for supporting wheel with seal
JPH11182537A (en) Rolling bearing unit for wheels
JP2003056577A (en) Bearing device for axle
JP2013217419A (en) Roller bearing device for wheel
JP4531541B2 (en) Sealing device
JP2002206547A (en) Seal ring and bearing unit for wheels with seal ring
JP4333116B2 (en) Rolling bearing sealing device
JP7559654B2 (en) Hub unit bearing
JP2003049853A (en) Seal structure of bearing device for vehicle
JP4582383B2 (en) Axle bearing sealing device
JP2022147755A (en) Wheel bearing device
JP2010001969A (en) Bearing seal for wheel and bearing device for wheel having the same
JP4178306B2 (en) Hub unit for vehicles
JP4639548B2 (en) Support body for vehicle bearing device
JP2002061660A (en) Rolling bearing unit for wheels
JP2002172911A (en) Hub unit for vehicle
JP3991655B2 (en) Rolling bearing device for vehicle
JP2004116713A (en) Rolling bearing device
JP2004098885A (en) Vehicular rolling bearing device
JP4560989B2 (en) Sealing device and axle bearing device
JP2014092227A (en) Wheel rolling bearing device
JP4068271B2 (en) Wheel bearing device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080627

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100729

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100805

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101004

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101026

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101224

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110125

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110207

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140304

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees