JP2004076758A - Sealed rolling bearing - Google Patents

Sealed rolling bearing Download PDF

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Publication number
JP2004076758A
JP2004076758A JP2002233428A JP2002233428A JP2004076758A JP 2004076758 A JP2004076758 A JP 2004076758A JP 2002233428 A JP2002233428 A JP 2002233428A JP 2002233428 A JP2002233428 A JP 2002233428A JP 2004076758 A JP2004076758 A JP 2004076758A
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JP
Japan
Prior art keywords
inner race
spacer
bearing
rolling bearing
intermediate seal
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.)
Pending
Application number
JP2002233428A
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Japanese (ja)
Inventor
Takeshi Osumi
大隅 毅
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NSK Ltd
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NSK Ltd
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Priority to JP2002233428A priority Critical patent/JP2004076758A/en
Publication of JP2004076758A publication Critical patent/JP2004076758A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22Bearings 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
    • F16C19/34Bearings 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
    • F16C19/38Bearings 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
    • F16C19/383Bearings 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
    • F16C19/388Bearings 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 four rows, i.e. four row tapered roller bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30Parts of ball or roller bearings
    • F16C33/58Raceways; Race rings
    • F16C33/60Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72Sealings
    • F16C33/76Sealings of ball or roller bearings
    • F16C33/768Sealings of ball or roller bearings between relatively stationary parts, i.e. static seals

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealed rolling bearing easily and inexpensively adaptable for gap adjustment in the bearing at its inside raceway ring units arranged side by side in the axial direction with an intermediate seal held therebetween. <P>SOLUTION: The sealed rolling bearing 31 has an inner ring 33 consisting of two inside raceway ring units 35, 36 and the intermediate seal 38 for sealing end faces 35a, 36a of the inside raceway ring units 35, 36. A spacer 41 for positioning the inside raceway ring units 35, 36 in the axial direction is provided between the inside raceway ring units 35, 36 with the intermediate seal 38. A seal holding groove 44 for fitting the intermediate seal 38 is formed by the inner periphery face of the spacer 41 and the end faces 35a, 36a of the inside raceway ring units 35, 36. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
本発明は密封式転がり軸受に関し、詳しくは、鉄鋼設備や圧延機等に使用されるロールネック軸受に用いて好適な密封式転がり軸受の改良に関する。
【0002】
【従来の技術】
従来より、熱間圧延機や冷間圧延機では、ワークロール、中間ロール、バックアップロール等を支承するロールネック軸受として、図6に示したような密封式転がり軸受が用いられている。
図6に示した密封式転がり軸受1は、内輪3と外輪5との間に転動体としての円錐ころ7が4列に配列された四列円錐転がり軸受であり、外輪5の外周面が軸箱に嵌合固定され、内輪回転で使用される。各列の円錐ころ7は、それぞれ保持器8によって、周方向の間隔が保持されている。
【0003】
前記内輪3は、軸線方向に突き合された2個の内側軌道輪ユニット11,12と、これら内側軌道輪ユニット11,12相互間に装備されて、これら内側軌道輪ユニット11,12相互の突き合わせ端面11a,12aを密封する中間シール14とから構成されている。
前記外輪5は、内輪3と同心に設けられた3個の外側軌道輪ユニット21,22,23と、これら外側軌道輪ユニット間に介在する間座25,26と、両端の外側軌道輪ユニット22,23の外端に装着されるシールホルダー27とで構成されている。
【0004】
前記シールホルダー27は、外周面にOリング28を保持するリング収容溝27aを有すると共に、内周面にはシール部材29を嵌合係止するシール収容部27bが形成されている。
前記Oリング28は、軸箱の外輪嵌合面に接触して、外輪5と軸箱の外輪嵌合面との間を密封する。前記シール部材29は、弾性材料製の可撓リップ部を内輪3の外周面に弾性接触させることで軸受両端部を密封し、軸受内部に充填された潤滑油が軸受端の隙間から外部に漏出することを防止すると共に、外部から軸受内部に異物が侵入することを防止する。
【0005】
前記内輪3を構成する2個の内側軌道輪ユニット11,12は、図7に示したように、互いに当接する突き合わせ端面11a,12aの内周側に凹んだ段差部11b,12bを設けることで、前記中間シール14を嵌合するシール保持溝16が形成されている。
【0006】
【発明が解決しようとする課題】
ところで、上述のように、内輪3を構成する内側軌道輪ユニット11,12相互が、間座を介さずに互いの突き合わせ端面11a,12aを直接当接させた構成では、当該内輪3において軸受内部の隙間調整をする場合に、各内側軌道輪ユニット11,12の突き合わせ端面11a,12aを削り加工しなければならない。
【0007】
しかしながら、圧延機のロールネック軸受等の場合は、内側軌道輪ユニット11,12の寸法が大きいため、切削加工が容易でなく、加工コストが嵩むという問題がある。
また、いったん突き合わせ端面11a,12aを削り加工して軸受内部の隙間を設定してしまうと、該隙間を大きくすることはできず、手直しができないという問題がある。即ち、軸受内部の隙間の増大が必要な場合は、新たな内側軌道輪ユニット11,12自体を用意する必要があり、更に高額な費用がかかるという問題があった。
【0008】
従って、本発明の目的は上記課題を解消することに係り、中間シールを挟んで設けられる内側軌道輪ユニットにおける軸受内部の隙間調整が容易、且つ安価に実現できる密封式転がり軸受を提供することにある。
【0009】
【課題を解決するための手段】
本発明の上記目的は、軸受の内輪が、複数の内側軌道輪ユニットから成ると共に、これら内側軌道輪ユニット相互の間を密封する中間シールを備えた密封式転がり軸受であって、これら内側軌道輪ユニットの軸線方向の位置決めをする間座が、前記中間シールを備えた内側軌道輪ユニット間に設けられており、該間座の内周面又は外周面と前記各内側軌道輪ユニットとによって、前記中間シールを嵌合するシール保持溝が形成されていることを特徴とする密封式転がり軸受により達成される。
【0010】
上記構成によれば、内側軌道輪ユニット相互の間を密封する中間シールに間座が並設されるため、該中間シールを挟んで軸線方向に並べられた複数の内側軌道輪ユニットから成る内輪において軸受内部の隙間調整をする場合、前記間座の軸線方向の寸法を手直しすることで対応することができ、外形寸法が大きな内側軌道輪ユニット自体の切削加工や作り直しは必要とならない。
そこで、内側軌道輪ユニット自体の寸法を変更する場合と比較すると、軸受内部の隙間調整を容易、且つ安価に実現できる。
【0011】
尚、前記間座は、一端が一方の内側軌道輪ユニットにインロー結合されるインロー段部を有し、他端が他方の内側軌道輪ユニットに当接する平坦面を有することが好ましい。
この場合、間座は一方の内側軌道輪ユニットとのインロー結合によって径方向の位置決めが確実にでき、更に、間座の内周面又は外周面との接触によって中間シールの径方向の位置決めが確実にできるため、優れた組立性を得ることができる。
又、前記間座は、一端が平坦面に形成されており、軸受内部の隙間を減少させるために間座端面を削る場合には、この平坦面側を加工面とすることで、加工も容易にできる。
【0012】
【発明の実施の形態】
以下、添付図面に基づいて本発明の一実施形態に係る密封式転がり軸受を詳細に説明する。
図1及び図2は、本発明の第1実施形態に係る密封式転がり軸受の縦断面図及び要部拡大図である。尚、図6において説明した従来例の密封式転がり軸受と同一の構成部材については、同符号を付すことにより詳細な説明を省略する。
【0013】
本第1実施形態の密封式転がり軸受31は、図1に示したように、内輪33と外輪5との間に転動体としての円錐ころ7が4列に配列された四列円錐転がり軸受であり、外輪5の外周面が軸箱に嵌合固定され、内輪回転で使用される。各列の円錐ころ7は、それぞれ保持器8によって、周方向の間隔が保持されている。
【0014】
本第1実施形態の密封式転がり軸受31における内輪33は、2個の内側軌道輪ユニット35,36と、これら内側軌道輪ユニット35,36相互間に装備されて、これら内側軌道輪ユニット35,36間を密封する中間シール38と、該中間シール38を挟む内側軌道輪ユニット35,36間に介在して、これら内側軌道輪ユニット35,36の軸線方向の位置決めをする間座41とを有している。
【0015】
前記間座41は、図2に示したように、一端が一方の内側軌道輪ユニット36の端面36aにインロー結合されるインロー段部41bを有し、他端が他方の内側軌道輪ユニット35の端面35aに当接する平坦面41aを有する。
前記インロー段部41bは、前記内側軌道輪ユニット36の端面36aに当接する平坦面41cの外周側に、前記内側軌道輪ユニット36の外周部に嵌合する円筒部41dを突設した構造である。
【0016】
そして、本第1実施形態では、この間座41の内周面と、各内側軌道輪ユニット35,36の端面35a,36aとによって、中間シール38を嵌合するシール保持溝44が形成されている。
前記中間シール38は、前記シール保持溝44内への嵌合によって保持させられており、前記間座41の内周面と該中間シール38の外周面とは、互いに接触した状態になるが、接着剤や締結手段等を利用した相互の接着固定は行わない。
【0017】
なお、前記各内側軌道輪ユニット35,36の端面35a,36aと、これら端面35a,36aに当接する間座41の両端面には、軸受内部に充填された潤滑油を導いてカジリを防止する油溝を形成するようにしても良い。
【0018】
このように構成された本第1実施形態に係る密封式転がり軸受31によれば、前記内側軌道輪ユニット35,36相互の間を密封する中間シール38に間座41が並設されるため、該中間シール38を挟んで並べられた2個の内側軌道輪ユニット35,36から成る内輪33において軸受内部の隙間調整をする場合、前記間座41の軸線方向の寸法を手直しすることで対応することができ、外形寸法が大きな内側軌道輪ユニット35,36自体の切削加工や作り直しは必要とならない。
【0019】
そして、軸受内部の隙間を減少させる場合には、前記間座41の平坦面41aを切削することで対応可能であり、また、軸受内部の隙間を増大させる場合には、前記間座41自体を作り直すことが必要となるが、該間座41は前記各内側軌道輪ユニット35,36と比較して外形寸法が遙かに小さく、軽いため、内側軌道輪ユニット35,36自体の寸法を変更する場合と比較すると、軸受内部の隙間調整を容易、且つ安価に実現できる。
【0020】
また、本第1実施形態の前記間座41は、一方の内側軌道輪ユニット35とのインロー結合によって径方向の位置決めが確実にでき、更に、間座41の内周面との接触によって中間シール38の径方向の位置決めが確実にできるため、優れた組立性を得ることができる。
又、前記間座41は、一端が平坦面41aに形成されており、軸受内部の隙間を減少させるために間座41の端面を削る場合には、この平坦面41a側を加工面とすることで、加工も容易にできる。
【0021】
なお、前記間座41の円筒部41dと前記内側軌道輪ユニット36の端面36aとをインロー結合させる具体的な構造は、上記実施形態の構造に限らない。
例えば、図3に示した本発明の第2実施形態に係る密封式転がり軸受のように、2個の内側軌道輪ユニット45,46の端面45a,46aの外周部に、間座41の円筒部41dの先端を収容するインロー用段差45b,46bを形成しても良い。
【0022】
また、本発明の中間シールの装備位置は、間座の内周面側に限らない。
図4に示した本発明の第3実施形態に係る密封式転がり軸受のように、間座51の円筒部51dの先端を内側軌道輪ユニット56の端面56aの内周部に形成したインロー用段差56bにインロー結合させ、該間座51の外周面側に中間シール58を嵌合させるようにしても良い。
即ち、間座51の外周面と、各内側軌道輪ユニット35,56の端面35a,56aとによって、中間シール58を嵌合するシール保持溝54が形成されている。
【0023】
また、本発明の中間シールの幅を、上記各実施形態のように間座によって規制する内側軌道輪ユニットの端面間の離間寸法に一致させる必要はない。
例えば、図5に示した本発明の第4実施形態に係る密封式転がり軸受のように、内側軌道輪ユニット65,66の端面65a,66aに、凹んだ段差65c,66cを設けて、間座41の幅よりも大きな幅wの中間シール68を装備することも可能である。
即ち、間座41の内周面と、各内側軌道輪ユニット65,66の段差65c,66cとによって、中間シール68を嵌合するシール保持溝64が形成されている。
【0024】
尚、本発明の密封式転がり軸受における内外輪、内側軌道輪ユニット、中間シール、及び間座等の構成は、上記各実施形態の構成に限定されるものではなく、本発明の趣旨に基づいて種々の形態を採りうることは云うまでもない。
また、本発明の密封式転がり軸受の用途は、高速圧延機のロールネック軸受に限るものではなく、上述した4列円錐ころ軸受以外の各種の密封式転がり軸受に適用可能である。
【0025】
【発明の効果】
以上に説明したように、本発明の密封式転がり軸受によれば、内側軌道輪ユニット相互の間を密封する中間シールに間座が並設されるため、該中間シールを挟んで軸線方向に並べられた複数の内側軌道輪ユニットから成る内輪において軸受内部の隙間調整をする場合、前記間座の軸線方向の寸法を手直しすることで対応することができ、外形寸法が大きな内側軌道輪ユニット自体の切削加工や作り直しは必要とならない。
そこで、内側軌道輪ユニット自体の寸法を変更する場合と比較すると、軸受内部の隙間調整を容易、且つ安価に実現できる。
【図面の簡単な説明】
【図1】本発明の第1実施形態に係る密封式転がり軸受の縦断面図である。
【図2】図1に示した密封式転がり軸受の要部拡大図である。
【図3】本発明の第2実施形態に係る密封式転がり軸受の要部拡大図である。
【図4】本発明の第3実施形態に係る密封式転がり軸受の要部拡大図である。
【図5】本発明の第4実施形態に係る密封式転がり軸受の要部拡大図である。
【図6】従来の密封式転がり軸受の縦断面図である。
【図7】図6に示した密封式転がり軸受の要部拡大図である。
【符号の説明】
5 外輪
7 円錐ころ
8 保持器
31 密封式転がり軸受
33 内輪
35,36 内側軌道輪ユニット
35a,36a 端面
38 中間シール
41 間座
41a 平坦面
41b インロー段部
44  シール保持溝
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sealed rolling bearing, and more particularly to an improvement in a sealed rolling bearing suitable for use in a roll neck bearing used in steel equipment, a rolling mill, or the like.
[0002]
[Prior art]
Conventionally, in a hot rolling mill or a cold rolling mill, a sealed rolling bearing as shown in FIG. 6 has been used as a roll neck bearing for supporting a work roll, an intermediate roll, a backup roll, and the like.
The sealed rolling bearing 1 shown in FIG. 6 is a four-row conical rolling bearing in which tapered rollers 7 as rolling elements are arranged in four rows between an inner ring 3 and an outer ring 5, and the outer peripheral surface of the outer ring 5 is a shaft. It is fitted and fixed to the box and used for inner ring rotation. The tapered rollers 7 in each row are each kept at a circumferential interval by a retainer 8.
[0003]
The inner race 3 is provided with two inner race units 11 and 12 which are axially abutted with each other, and is provided between the inner race units 11 and 12 so that the inner race units 11 and 12 abut each other. And an intermediate seal 14 for sealing the end faces 11a and 12a.
The outer race 5 includes three outer race units 21, 22, 23 provided concentrically with the inner race 3, spacers 25, 26 interposed between the outer race units, and outer race units 22 at both ends. , 23 and a seal holder 27 attached to the outer end.
[0004]
The seal holder 27 has a ring accommodating groove 27a for holding the O-ring 28 on the outer peripheral surface, and a seal accommodating portion 27b for fitting and locking the seal member 29 on the inner peripheral surface.
The O-ring 28 comes into contact with the outer ring fitting surface of the axle box to seal between the outer ring 5 and the outer ring fitting surface of the axle box. The seal member 29 seals both ends of the bearing by making a flexible lip portion made of an elastic material elastically contact the outer peripheral surface of the inner ring 3, and the lubricating oil filled in the bearing leaks out from the gap at the bearing end. And the intrusion of foreign matter into the bearing from outside.
[0005]
As shown in FIG. 7, the two inner race units 11 and 12 constituting the inner race 3 are provided with recessed steps 11b and 12b on the inner peripheral side of the butted end surfaces 11a and 12a that abut against each other. A seal holding groove 16 for fitting the intermediate seal 14 is formed.
[0006]
[Problems to be solved by the invention]
By the way, as described above, in the configuration in which the inner race ring units 11 and 12 constituting the inner race 3 directly contact the butted end faces 11a and 12a without passing through the spacer, the inner race 3 has a bearing inside. In order to adjust the clearance, the butted end surfaces 11a and 12a of the inner race members 11 and 12 must be cut and machined.
[0007]
However, in the case of a roll neck bearing or the like of a rolling mill, since the dimensions of the inner race units 11 and 12 are large, there is a problem that cutting is not easy and processing costs increase.
Further, once the butting end surfaces 11a and 12a are machined to set a gap inside the bearing, there is a problem that the gap cannot be enlarged and cannot be modified. That is, when it is necessary to increase the clearance inside the bearing, it is necessary to prepare new inner race units 11 and 12 themselves, and there is a problem that the cost is higher.
[0008]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and to provide a sealed rolling bearing which can easily and inexpensively adjust a clearance inside a bearing in an inner race unit provided with an intermediate seal therebetween. is there.
[0009]
[Means for Solving the Problems]
An object of the present invention is to provide a sealed rolling bearing in which an inner ring of a bearing includes a plurality of inner race units and an intermediate seal for sealing between the inner race units. A spacer for positioning the unit in the axial direction is provided between the inner bearing ring units provided with the intermediate seal, and the inner peripheral surface or the outer peripheral surface of the spacer and each of the inner bearing ring units, This is achieved by a sealed rolling bearing characterized in that a seal holding groove for fitting an intermediate seal is formed.
[0010]
According to the above configuration, the spacer is arranged in parallel with the intermediate seal that seals between the inner bearing ring units. Therefore, in the inner ring including the plurality of inner bearing ring units arranged in the axial direction with the intermediate seal interposed therebetween. When adjusting the clearance inside the bearing, it is possible to cope by adjusting the dimension of the spacer in the axial direction, and it is not necessary to cut or rework the inner race unit having a large outer dimension.
Therefore, as compared with the case where the dimensions of the inner race member unit itself are changed, it is possible to easily and inexpensively adjust the clearance inside the bearing.
[0011]
It is preferable that the spacer has a spigot step portion having one end spigot-coupled to one inner raceway unit, and the other end has a flat surface in contact with the other inner raceway unit.
In this case, the spacer can be reliably positioned in the radial direction by the spigot connection with one of the inner race members, and the radial position of the intermediate seal can be reliably determined by contact with the inner or outer peripheral surface of the spacer. Therefore, excellent assemblability can be obtained.
Further, the spacer has one end formed in a flat surface, and when the spacer end surface is cut in order to reduce the clearance inside the bearing, the flat surface side is used as a processing surface, so that processing is easy. Can be.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a sealed rolling bearing according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
1 and 2 are a longitudinal sectional view and a main part enlarged view of a sealed rolling bearing according to a first embodiment of the present invention. The same components as those of the conventional sealed rolling bearing described with reference to FIG. 6 are denoted by the same reference numerals and will not be described in detail.
[0013]
As shown in FIG. 1, the sealed rolling bearing 31 of the first embodiment is a four-row conical rolling bearing in which the tapered rollers 7 as rolling elements are arranged in four rows between the inner ring 33 and the outer ring 5. In addition, the outer peripheral surface of the outer ring 5 is fitted and fixed to the axle box and used for rotation of the inner ring. The tapered rollers 7 in each row are each kept at a circumferential interval by a retainer 8.
[0014]
The inner race 33 in the sealed rolling bearing 31 of the first embodiment is provided with two inner race units 35, 36 and between the inner race units 35, 36. An intermediate seal 38 for sealing the space between the inner ring 36 and a spacer 41 interposed between the inner ring units 35 and 36 sandwiching the intermediate seal 38 and positioning the inner ring units 35 and 36 in the axial direction. are doing.
[0015]
As shown in FIG. 2, the spacer 41 has a spigot step 41 b having one end spigot-coupled to an end face 36 a of one inner race member unit 36, and the other end of the inner race member unit 35. It has a flat surface 41a in contact with the end surface 35a.
The spigot step portion 41b has a structure in which a cylindrical portion 41d that fits on the outer peripheral portion of the inner race member unit 36 protrudes from the outer peripheral side of a flat surface 41c that contacts the end surface 36a of the inner race member unit 36. .
[0016]
In the first embodiment, a seal holding groove 44 in which the intermediate seal 38 is fitted is formed by the inner peripheral surface of the spacer 41 and the end surfaces 35a, 36a of the inner race members 35, 36. .
The intermediate seal 38 is held by fitting into the seal holding groove 44, and the inner peripheral surface of the spacer 41 and the outer peripheral surface of the intermediate seal 38 come into contact with each other. No mutual bonding and fixing using an adhesive or fastening means is performed.
[0017]
The lubricating oil filled in the bearing is guided to the end surfaces 35a, 36a of the inner race members 35, 36 and the both end surfaces of the spacer 41 abutting on the end surfaces 35a, 36a to prevent galling. An oil groove may be formed.
[0018]
According to the sealing type rolling bearing 31 according to the first embodiment configured as described above, the spacer 41 is arranged in parallel with the intermediate seal 38 that seals between the inner race units 35 and 36. In the case of adjusting the clearance inside the bearing in the inner ring 33 composed of the two inner race units 35 and 36 arranged with the intermediate seal 38 interposed therebetween, the dimension in the axial direction of the spacer 41 is adjusted. Therefore, it is not necessary to cut or rework the inner race units 35 and 36 having large external dimensions.
[0019]
When the clearance inside the bearing is reduced, it can be dealt with by cutting the flat surface 41a of the spacer 41, and when the clearance inside the bearing is increased, the spacer 41 itself is removed. Although it is necessary to re-make the spacer 41, since the outer dimensions of the spacer 41 are much smaller and lighter than those of the inner race units 35, 36, the dimensions of the inner race units 35, 36 themselves are changed. Compared with the case, the gap adjustment inside the bearing can be realized easily and at low cost.
[0020]
Further, the spacer 41 of the first embodiment can be reliably positioned in the radial direction by the spigot connection with one inner race member unit 35, and furthermore, the intermediate seal is formed by contact with the inner peripheral surface of the spacer 41. 38 can be reliably positioned in the radial direction, so that excellent assemblability can be obtained.
The spacer 41 has one end formed on a flat surface 41a. When the end surface of the spacer 41 is cut to reduce a gap inside the bearing, the flat surface 41a side is used as a processing surface. Thus, processing can be easily performed.
[0021]
In addition, the specific structure in which the cylindrical portion 41d of the spacer 41 and the end surface 36a of the inner race member unit 36 are spigot-coupled is not limited to the structure of the above embodiment.
For example, like the sealed rolling bearing according to the second embodiment of the present invention shown in FIG. 3, the cylindrical portion of the spacer 41 is provided on the outer peripheral portions of the end surfaces 45a and 46a of the two inner race members 45 and 46. The spigot steps 45b and 46b for accommodating the tip of 41d may be formed.
[0022]
Further, the installation position of the intermediate seal of the present invention is not limited to the inner peripheral surface side of the spacer.
As in the sealed rolling bearing according to the third embodiment of the present invention shown in FIG. 4, a step for a spigot in which the tip of the cylindrical portion 51 d of the spacer 51 is formed on the inner periphery of the end face 56 a of the inner race unit 56 The intermediate seal 58 may be fitted to the outer peripheral surface side of the spacer 51 by spigot connection with the spacer 56b.
That is, a seal holding groove 54 in which the intermediate seal 58 is fitted is formed by the outer peripheral surface of the spacer 51 and the end surfaces 35a, 56a of the inner race members 35, 56.
[0023]
Further, the width of the intermediate seal of the present invention does not need to match the distance between the end faces of the inner race unit which is regulated by the spacer as in the above embodiments.
For example, like the sealed rolling bearing according to the fourth embodiment of the present invention shown in FIG. 5, concave steps 65c, 66c are provided on the end faces 65a, 66a of the inner race units 65, 66, and the spacers are provided. It is also possible to equip the intermediate seal 68 with a width w greater than the width of 41.
That is, the seal holding groove 64 in which the intermediate seal 68 is fitted is formed by the inner peripheral surface of the spacer 41 and the steps 65c, 66c of the inner race members 65, 66.
[0024]
In addition, the configuration of the inner and outer rings, the inner race member unit, the intermediate seal, the spacer, and the like in the sealed rolling bearing of the present invention is not limited to the configuration of each of the above embodiments, but based on the gist of the present invention. It goes without saying that it can take various forms.
In addition, the application of the sealed rolling bearing of the present invention is not limited to the roll neck bearing of a high-speed rolling mill, but can be applied to various sealed rolling bearings other than the above-described four-row tapered roller bearing.
[0025]
【The invention's effect】
As described above, according to the sealed rolling bearing of the present invention, the spacers are juxtaposed in the intermediate seal that seals between the inner race members, and are arranged in the axial direction with the intermediate seal interposed therebetween. In the case of adjusting the clearance inside the bearing in the inner ring composed of a plurality of inner race members, it is possible to cope by adjusting the axial dimension of the spacer, and the outer race has a large outer race. No cutting or rework is required.
Therefore, as compared with the case where the dimensions of the inner race member unit itself are changed, it is possible to easily and inexpensively adjust the clearance inside the bearing.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a sealed rolling bearing according to a first embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of the sealed rolling bearing shown in FIG.
FIG. 3 is an enlarged view of a main part of a sealed rolling bearing according to a second embodiment of the present invention.
FIG. 4 is an enlarged view of a main part of a sealed rolling bearing according to a third embodiment of the present invention.
FIG. 5 is an enlarged view of a main part of a sealed rolling bearing according to a fourth embodiment of the present invention.
FIG. 6 is a longitudinal sectional view of a conventional sealed rolling bearing.
FIG. 7 is an enlarged view of a main part of the sealed rolling bearing shown in FIG. 6;
[Explanation of symbols]
5 Outer ring 7 Tapered roller 8 Cage 31 Sealed rolling bearing 33 Inner ring 35, 36 Inner raceway unit 35a, 36a End face 38 Intermediate seal 41 Spacer 41a Flat face 41b Inlay step 44 Seal holding groove

Claims (2)

軸受の内輪が、複数の内側軌道輪ユニットから成ると共に、これら内側軌道輪ユニット相互の間を密封する中間シールを備えた密封式転がり軸受であって、
これら内側軌道輪ユニットの軸線方向の位置決めをする間座が、前記中間シールを備えた内側軌道輪ユニット間に設けられており、該間座の内周面又は外周面と前記各内側軌道輪ユニットとによって、前記中間シールを嵌合するシール保持溝が形成されていることを特徴とする密封式転がり軸受。
A sealed rolling bearing in which the inner ring of the bearing is composed of a plurality of inner race units and has an intermediate seal for sealing between the inner race units,
Spacers for positioning these inner race units in the axial direction are provided between the inner race units provided with the intermediate seal, and the inner or outer peripheral surface of the spacer and each of the inner race units are provided. And a seal holding groove for fitting the intermediate seal is formed.
前記間座は、一端が一方の内側軌道輪ユニットにインロー結合されるインロー段部を有し、他端が他方の内側軌道輪ユニットに当接する平坦面を有することを特徴とする請求項1に記載の密封式転がり軸受。2. The spacer according to claim 1, wherein one end of the spacer has a spigot step portion that is spigot-joined to one inner race unit, and the other end has a flat surface that abuts on the other inner race unit. 3. The sealed rolling bearing as described.
JP2002233428A 2002-08-09 2002-08-09 Sealed rolling bearing Pending JP2004076758A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002233428A JP2004076758A (en) 2002-08-09 2002-08-09 Sealed rolling bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002233428A JP2004076758A (en) 2002-08-09 2002-08-09 Sealed rolling bearing

Publications (1)

Publication Number Publication Date
JP2004076758A true JP2004076758A (en) 2004-03-11

Family

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Family Applications (1)

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Country Status (1)

Country Link
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106499734A (en) * 2015-09-03 2017-03-15 斯凯孚公司 Sealing device for roller bearing unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106499734A (en) * 2015-09-03 2017-03-15 斯凯孚公司 Sealing device for roller bearing unit

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