JP2004251306A - Roller bearing - Google Patents

Roller bearing Download PDF

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Publication number
JP2004251306A
JP2004251306A JP2003039458A JP2003039458A JP2004251306A JP 2004251306 A JP2004251306 A JP 2004251306A JP 2003039458 A JP2003039458 A JP 2003039458A JP 2003039458 A JP2003039458 A JP 2003039458A JP 2004251306 A JP2004251306 A JP 2004251306A
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JP
Japan
Prior art keywords
roller bearing
circumferential groove
inner ring
flange
lubricating oil
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.)
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JP2003039458A
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Japanese (ja)
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JP4089458B2 (en
Inventor
Naohisa Akazawa
尚久 赤澤
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Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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Priority to JP2003039458A priority Critical patent/JP4089458B2/en
Publication of JP2004251306A publication Critical patent/JP2004251306A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/664—Retaining the liquid in or near the bearing
    • F16C33/6651—Retaining the liquid in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
    • 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
    • F16C19/36—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 a single row of rollers
    • F16C19/364—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 a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers

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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 improve seizure resistance of a tapered roller bearing 1. <P>SOLUTION: In an inner ring 3 in this tapered roller bearing 1, dams 3d are provided at a plurality of positions in a circumference of a circumferential groove 3c. When rotation is stopped as the tapered roller bearing 1 is supported around a horizontal shaft, lubricating oil existing in the circumferential groove 3c in an upper half of the inner ring 3 is prohibited by the dams 3d from dropping down. Even immediately after rotation is started, lubricating oil is easily supplied to an end surface of a tapered roller 4, an inner side surface of a flange 3b, a race surface 3a, etc., in a whole circumferential range of the inner ring 3, especially in an upper half range. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、ころ軸受に関する。
【０００２】
【従来の技術】
一般的に、軸方向一端に径方向外向きに延びる鍔を設けた鍔付き内輪や、軸方向一端に径方向内向きに延びる鍔を設けた鍔付き外輪において、鍔と軌道面との交差部に、軌道面および鍔の内側面を研削するための加工具を逃がすための周溝を設けることがある。
【０００３】
なお、上記加工具逃がし用の周溝と類似しているが、上記鍔付き外輪の軌道面と鍔との交差部にグリース保持用の周溝を設けたものが出願されている（特許文献１参照）。この出願は、回転遠心力によって流動する潤滑油を外輪の周溝で保持させて潤滑油の飛散防止を図ることを目的としている。
【０００４】
このような鍔付き内輪や鍔付き外輪を有するころ軸受を横軸周りに回転支持する場合、回転を停止させていると、周溝が全周にわたって連続するものであるため、内輪や外輪の上半分の周溝内に入っていた潤滑油は、周溝を伝って下へ流れ落ちやすい。そのため、回転開始させた直後には、潤滑油が不足する部分ができやすくなる。
【０００５】
これに対して、鍔付き内輪の鍔と外径軌道面との交差部に周溝を設け、この周溝に対して低融点油脂を充填したものが出願されている（特許文献２参照）。
【０００６】
【特許文献１】
特開２００２−２７６６７６号公報
【特許文献２】
特開２０００−２３０５６０号公報
【０００７】
【発明が解決しようとする課題】
上記特許文献２のように、鍔付き内輪の周溝内に低融点油脂を充填している場合、回転停止中でも、内輪の上半分の周溝内に存在する油脂が下へ流れ落ちにくいと言える。しかし、このような特許文献２のころ軸受は、低融点油脂を使用できない条件、例えば飛沫給油方式のように液状の潤滑剤を用いる必要がある環境では使用不可能である。
【０００８】
【課題を解決するための手段】
本発明のころ軸受は、外輪と内輪との間に複数のころを介装したもので、前記内輪または外輪は、外径または内径部分がころの軌道面とされているとともに、外径または内径部分の軸方向一端に鍔を有し、この鍔と前記軌道面との交差部の円周数ヶ所に潤滑油溜まり用の凹部が設けられている。
【０００９】
この場合、例えばころ軸受を横軸周りに回転支持する状況で、回転を停止させているとき、内輪または外輪の上半分に位置する凹部内に入っている潤滑油はその粘度に関係なく、下へ流れ落ちにくくなる。そのため、回転開始直後でも、特に内輪または外輪の上半分において鍔の内側面や軌道面などへ潤滑油を供給することが可能になる。
【００１０】
ところで、上記凹部としては、交差部に周溝を設けるとともに、この周溝の円周数ヶ所に所定高さの堰を設けることによって得ることができる。この場合、凹部は、上記のとおり潤滑油溜まりとして利用できる他、前記周溝については軌道面や鍔の内側面を研削するための加工具の逃がし用の溝として利用できる。
【００１１】
また、上記堰は、接着剤または含油ポリマーとすることができる。この場合、堰を簡単に得ることができる。
【００１２】
この他、上記凹部としては、軌道面と鍔との交差部に周溝を設けるとともに、この周溝の円周数ヶ所に所定深さの穴を設けることによって得ることができる。この場合、周溝全体と穴とに潤滑油が溜まるので、多くの潤滑油を保持できるようになる。さらに、本発明は、上記軌道面と鍔との交差部に周溝を設けずに、凹部のみを点在形成したものも含む。
【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。ここでは、単列の円すいころ軸受１を例に挙げている。この円すいころ軸受１は、外輪２と、内輪３と、複数の円すいころ４と、保持器５とを備えている。
【００１４】
外輪２は、その内径にテーパ形状の軌道面２ａを有しており、また、内輪３は、その外径にテーパ形状の軌道面３ａを有している。保持器５は、いわゆる打ち抜き型と呼ばれるものであり、円周数ヶ所に円すいころ４を収納するポケット５ａを有している。
【００１５】
そして、上記内輪３の軌道面３ａの大径側には、径方向外向きに延びる鍔３ｂが設けられており、軌道面３ａと鍔３ｂとの交差部には周溝３ｃが設けられている。この周溝３ｃ内の円周数ヶ所には、周溝３ｃの深さよりも若干低い高さの堰３ｄが設けられている。このような堰３ｄを設けると、結果的に周溝３ｃの円周数ヶ所に凹部３ｅが存在することになる。
【００１６】
ところで、上記周溝３ｃと堰３ｄは、旋削加工により形成することも可能であるが、堰３ｄを接着剤の塊とすることができる。その場合、接着剤からなる堰３ｄは、周溝３ｃ内に簡単に形成することができる。この他、上記堰３ｄを、含油ポリマーとすることができる。この含油ポリマーは、樹脂に対して潤滑油を混合して得られる液状または半固体状の混合物を加熱して固形化したものである。前記樹脂は、平均分子量が約１×１０６〜５×１０６のプラスチックが好ましく、また、潤滑油は、前記樹脂のゲル化温度より高い滴点を有するものが好ましい。具体的に、前記樹脂としては、例えば超高分子量ポリエチレン、ポリプロピレン樹脂、ポリ４−メチルペンテン−１樹脂などのポリオレフィン樹脂、フェノール樹脂、ウレタン樹脂などが挙げられる。また、前記潤滑油としては、鉱油、ポリα−オレフィン油、アルキルポリフェニルエーテル油、エステル油、ジエステル油、アルキルナフタレン油などが挙げられる。
【００１７】
以上説明したように、内輪３の周溝３ｃを、軌道面３ａと鍔３ｂの内側面とを研削するための加工具の逃がし用の溝として利用できるとともに、潤滑油の溜まりとして利用できる。
【００１８】
しかも、上記円すいころ軸受１を例えば横軸周りに回転支持して、飛沫給油により潤滑を行うような状況で、回転を停止させた場合、内輪３の上半分に位置する凹部３ｅ内に入っている潤滑油は、従来例のように内輪３の下へ流れ落ちることがなくなる。そのため、回転開始直後でも、円周上の全域、特に内輪３の上半分で円すいころ４の端面、鍔３ｂの内側面、軌道面３ａなどへ潤滑油が良好に供給されることになる。したがって、上記円すいころ軸受１では、耐焼付き性が向上し、動作安定化、寿命向上に貢献できるようになる。
【００１９】
以下、本発明の変形例や応用例を説明する。
【００２０】
図３および図４に本発明の他の実施形態を示している。この例では、鍔３ｂ付き内輪３において、軌道面３ａと鍔３ｂの交差部に周溝３ｃを設けているとともに、この周溝３ｃ内に対して、円周数ヶ所に貫通孔６ａを設けたリング６をはめ込むようにしている。このようなリング６を周溝３ｃに取り付ければ、周溝３ｃ内でリング６の円周数ヶ所に設けてある貫通孔６ａが潤滑油溜まり用の凹部となる。この場合も、上述した実施形態と同様の効果が得られる。しかも、このようなリング６を用いる場合、その取り付けが簡単で、生産性において有利となる。しかも、上記リング６については、上述した含油ポリマーなどとすることができる。この場合、含油ポリマーからにじみ出る油分が、円すいころ４、外輪２の軌道面２ａならびに内輪３の軌道面３ａなどに対して転移供給されることになり、潤滑性能向上に貢献する。
【００２１】
図５および図６に本発明のさらに他の実施形態を示している。この例では、鍔３ｂ付き内輪３において、軌道面３ａと鍔３ｂの交差部に周溝３ｃを設けているとともに、この周溝３ｃの底の円周数ヶ所に所定深さの穴３ｆを設けている。この場合、周溝３ｃ全体と穴３ｆとに潤滑油が溜まるので、より多量の潤滑油を溜めることができる。
【００２２】
この他、上記実施形態では円すいころ軸受１の内輪３を例に挙げたが、外輪２にも適用できることはもちろんの他、例えば円筒ころ軸受、球面ころ軸受などに適用できるとともに、その軸受についても単列のみでなく、複列としたものにも本発明を適用できる。
【００２３】
さらに、図７に示すように、鉄道車両などの車軸１１を支持する車軸用軸受装置１０や駆動装置にも適用できる。図例の車軸用軸受装置１０は、外輪１２と、第１、第２の内輪１３，１４と、複数の円すいころ１５と、２つの保持器１６，１７とを備え、複列円すいころ軸受タイプになっている。
【００２４】
なお、外輪１２の軸方向両端には、シール１８，１９が装着される。このシール１８，１９によって円すいころ１５が配置される環状空間が密封されるが、この密封空間には、オイルアンドエアやオイルミストなどの潤滑油を供給するようになっている。第１、第２の内輪１３，１４の外径部分には、大鍔２１と、円すいころ１５が転動するテーパ形状の軌道面２２とが設けられている。この軌道面２２と大鍔２１との交差部には、周溝２３が設けられている。この周溝２３は、軌道面２２と大鍔２１の内側面とを研削仕上げするときの研削加工具を逃がすために通常設けられている。
【００２５】
上記第１、第２の内輪１３，１４の各周溝２３について、上述した各実施形態と同じ構成にすることができる。それにより、回転開始直後の潤滑不足を解消できるようになる。
【００２６】
【発明の効果】
本発明のころ軸受は、横軸周りで回転支持される状況で、回転を停止している場合、内輪または外輪の上半分に位置する凹部に潤滑油を保持させることができるから、回転開始直後においても内輪または外輪のほぼ円周全域に潤滑油を供給しやすくなる。したがって、耐焼付き性が向上し、動作安定化、寿命向上に貢献できる。
【図面の簡単な説明】
【図１】本発明の実施形態に係る円すいころ軸受を示す断面図
【図２】図１の内輪の一部を断面にした斜視図
【図３】本発明の他の実施形態に係る円すいころ軸受を示す断面図
【図４】図３の内輪の一部を断面にした斜視図
【図５】本発明の他の実施形態に係る円すいころ軸受を示す断面図
【図６】図５の内輪の一部を断面にした斜視図
【図７】本発明の他の実施形態に係る車軸用軸受装置を示す断面図
【符号の説明】
１ 円すいころ軸受 ２ 外輪
３ 内輪 ４ 円すいころ
３ａ 内輪の軌道面 ３ｂ 内輪の鍔
３ｃ 内輪の周溝 ３ｄ 堰
３ｅ 凹部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a roller bearing.
[0002]
[Prior art]
Generally, in a flanged inner ring provided with a flange extending radially outward at one end in the axial direction, or a flanged outer ring provided with a flange extending radially inward at one end in the axial direction, the intersection between the flange and the raceway surface In some cases, a peripheral groove for releasing a processing tool for grinding the raceway surface and the inner surface of the flange may be provided.
[0003]
It should be noted that, although similar to the above-described peripheral groove for processing tool escape, an application in which a peripheral groove for retaining grease is provided at the intersection of the raceway surface of the flanged outer ring and the flange has been filed (Patent Document 1). reference). The purpose of this application is to prevent lubricating oil from scattering by holding the lubricating oil flowing by the rotational centrifugal force in the circumferential groove of the outer ring.
[0004]
When such a roller bearing having a flanged inner ring or a flanged outer ring is rotatably supported around a horizontal axis, when rotation is stopped, the circumferential groove is continuous over the entire circumference, so that the inner ring and the outer ring are The lubricating oil that was in the half circumferential groove tends to flow down along the circumferential groove. Therefore, immediately after the rotation is started, a portion where the lubricating oil is insufficient tends to be formed.
[0005]
On the other hand, there is an application in which a circumferential groove is provided at an intersection between a flange of an inner ring with a flange and an outer diameter raceway surface, and the circumferential groove is filled with a low melting point fat (see Patent Document 2).
[0006]
[Patent Document 1]
JP 2002-276676 A [Patent Document 2]
JP 2000-230560 A
[Problems to be solved by the invention]
When the peripheral groove of the flanged inner ring is filled with the low melting point oil or fat as in Patent Document 2, it can be said that the oil or fat existing in the upper half peripheral groove of the inner ring hardly flows down even during rotation stop. However, such a roller bearing of Patent Literature 2 cannot be used under conditions in which low melting point fats and oils cannot be used, for example, in an environment in which a liquid lubricant needs to be used such as a droplet lubrication system.
[0008]
[Means for Solving the Problems]
The roller bearing of the present invention has a plurality of rollers interposed between an outer ring and an inner ring, and the inner ring or the outer ring has an outer diameter or an inner diameter portion as a roller raceway surface and an outer diameter or an inner diameter. A flange is provided at one end in the axial direction of the portion, and lubricating oil accumulation recesses are provided at several places around the intersection of the flange and the raceway surface.
[0009]
In this case, for example, in a situation where the roller bearing is rotatably supported around the horizontal axis, when the rotation is stopped, the lubricating oil contained in the concave portion located in the upper half of the inner ring or the outer ring has a lower lubrication oil regardless of its viscosity. It becomes difficult to flow down. Therefore, even immediately after the start of rotation, it is possible to supply the lubricating oil to the inner side surface and the raceway surface of the flange, particularly in the upper half of the inner ring or the outer ring.
[0010]
By the way, the concave portion can be obtained by providing a circumferential groove at the intersection and providing a weir of a predetermined height in several places around the circumferential groove. In this case, the concave portion can be used as a lubricating oil reservoir as described above, and the peripheral groove can be used as a relief groove for a working tool for grinding the raceway surface and the inner surface of the flange.
[0011]
Also, the weir can be an adhesive or an oil-containing polymer. In this case, a weir can be easily obtained.
[0012]
In addition, the recess can be obtained by providing a circumferential groove at the intersection of the raceway surface and the flange, and providing holes of a predetermined depth at several places on the circumference of the circumferential groove. In this case, since the lubricating oil is accumulated in the entire circumferential groove and the hole, a large amount of lubricating oil can be held. Further, the present invention also includes an embodiment in which only a concave portion is formed in a dotted manner without providing a circumferential groove at an intersection between the raceway surface and the flange.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
1 and 2 show an embodiment of the present invention. Here, a single-row tapered roller bearing 1 is taken as an example. The tapered roller bearing 1 includes an outer ring 2, an inner ring 3, a plurality of tapered rollers 4, and a retainer 5.
[0014]
The outer race 2 has a tapered raceway surface 2a on its inner diameter, and the inner race 3 has a tapered raceway surface 3a on its outer diameter. The retainer 5 is a so-called punching type, and has pockets 5a for accommodating the tapered rollers 4 at several places around the circumference.
[0015]
A radially outwardly extending flange 3b is provided on the large diameter side of the raceway surface 3a of the inner race 3, and a circumferential groove 3c is provided at the intersection of the raceway surface 3a and the flange 3b. . At several locations around the circumference of the circumferential groove 3c, weirs 3d having a height slightly lower than the depth of the circumferential groove 3c are provided. When such a weir 3d is provided, consequently, concave portions 3e are present at several places on the circumference of the circumferential groove 3c.
[0016]
Incidentally, the circumferential groove 3c and the weir 3d can be formed by turning, but the weir 3d can be a lump of adhesive. In that case, the weir 3d made of the adhesive can be easily formed in the circumferential groove 3c. In addition, the weir 3d can be made of an oil-containing polymer. The oil-impregnated polymer is obtained by heating a liquid or semi-solid mixture obtained by mixing a resin with a lubricating oil and solidifying the mixture. The resin is preferably a plastic having an average molecular weight of about 1 × 10 6 to 5 × 10 6 , and the lubricating oil preferably has a drop point higher than the gelation temperature of the resin. Specifically, examples of the resin include polyolefin resins such as ultrahigh molecular weight polyethylene, polypropylene resin, and poly-4-methylpentene-1 resin, phenol resins, and urethane resins. Examples of the lubricating oil include mineral oil, poly-α-olefin oil, alkyl polyphenyl ether oil, ester oil, diester oil, and alkyl naphthalene oil.
[0017]
As described above, the circumferential groove 3c of the inner ring 3 can be used as a relief groove for a working tool for grinding the raceway surface 3a and the inner surface of the flange 3b, and can be used as a reservoir of lubricating oil.
[0018]
In addition, when the tapered roller bearing 1 is rotatably supported, for example, about a horizontal axis and lubricated by splash lubrication, when the rotation is stopped, the tapered roller bearing 1 enters the concave portion 3 e located in the upper half of the inner ring 3. The lubricating oil does not flow below the inner ring 3 unlike the conventional example. Therefore, even immediately after the start of rotation, the lubricating oil can be satisfactorily supplied to the entire area on the circumference, particularly the upper surface of the inner ring 3, the end surface of the tapered roller 4, the inner surface of the flange 3 b, and the raceway surface 3 a. Therefore, in the tapered roller bearing 1, the seizure resistance is improved, and the operation can be stabilized and the life can be improved.
[0019]
Hereinafter, modified examples and application examples of the present invention will be described.
[0020]
3 and 4 show another embodiment of the present invention. In this example, in the inner ring 3 with the flange 3b, a circumferential groove 3c is provided at the intersection of the raceway surface 3a and the flange 3b, and through holes 6a are provided in several places in the circumferential groove 3c. The ring 6 is fitted. When such a ring 6 is attached to the circumferential groove 3c, the through holes 6a provided at several places around the ring 6 in the circumferential groove 3c become concave portions for storing the lubricating oil. In this case, the same effect as in the above-described embodiment can be obtained. Moreover, when such a ring 6 is used, its attachment is simple, which is advantageous in productivity. Moreover, the ring 6 can be made of the above-described oil-containing polymer. In this case, the oil oozing from the oil-containing polymer is transferred and supplied to the tapered rollers 4, the raceway surface 2a of the outer ring 2, the raceway surface 3a of the inner ring 3, and the like, thereby contributing to the improvement of lubrication performance.
[0021]
5 and 6 show still another embodiment of the present invention. In this example, in the inner ring 3 with the flange 3b, a circumferential groove 3c is provided at the intersection of the raceway surface 3a and the flange 3b, and holes 3f having a predetermined depth are provided at several locations on the bottom of the circumferential groove 3c. ing. In this case, since the lubricating oil is stored in the entire circumferential groove 3c and the hole 3f, a larger amount of lubricating oil can be stored.
[0022]
In addition, in the above embodiment, the inner ring 3 of the tapered roller bearing 1 has been described as an example. However, the present invention can be applied not only to the outer ring 2 but also to, for example, a cylindrical roller bearing and a spherical roller bearing. The present invention can be applied not only to a single row but also to a double row.
[0023]
Further, as shown in FIG. 7, the present invention can be applied to an axle bearing device 10 and a drive device that support an axle 11 such as a railway vehicle. The illustrated axle bearing device 10 includes an outer ring 12, first and second inner rings 13, 14, a plurality of tapered rollers 15, and two retainers 16, 17, and is a double-row tapered roller bearing type. It has become.
[0024]
In addition, seals 18 and 19 are attached to both ends in the axial direction of the outer ring 12. The annular spaces in which the tapered rollers 15 are arranged are sealed by the seals 18 and 19, and lubricating oil such as oil and air or oil mist is supplied to the sealed spaces. A large flange 21 and a tapered raceway surface 22 on which the tapered rollers 15 roll are provided on the outer diameter portions of the first and second inner rings 13 and 14. A circumferential groove 23 is provided at the intersection of the raceway surface 22 and the large collar 21. The circumferential groove 23 is usually provided to allow a grinding tool for grinding the raceway surface 22 and the inner surface of the large flange 21 to escape.
[0025]
Each of the peripheral grooves 23 of the first and second inner rings 13 and 14 can have the same configuration as that of each of the above-described embodiments. This makes it possible to eliminate insufficient lubrication immediately after the start of rotation.
[0026]
【The invention's effect】
The roller bearing of the present invention is capable of holding the lubricating oil in the concave portion located in the upper half of the inner ring or the outer ring when the rotation is stopped in a situation where the roller bearing is rotatably supported around the horizontal axis. In this case, the lubricating oil can be easily supplied to almost the entire circumference of the inner ring or the outer ring. Therefore, the seizure resistance is improved, and the operation can be stabilized and the life can be improved.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a tapered roller bearing according to an embodiment of the present invention. FIG. 2 is a perspective view in which a part of an inner ring of FIG. 1 is sectioned. FIG. 3 is a tapered roller according to another embodiment of the present invention. FIG. 4 is a cross-sectional view showing a part of the inner ring of FIG. 3; FIG. 5 is a cross-sectional view showing a tapered roller bearing according to another embodiment of the present invention; FIG. 6 is an inner ring of FIG. FIG. 7 is a cross-sectional view showing a bearing device for an axle according to another embodiment of the present invention.
Reference Signs List 1 tapered roller bearing 2 outer ring 3 inner ring 4 tapered roller 3a inner raceway surface 3b inner ring flange 3c inner ring peripheral groove 3d weir 3e recess

Claims (3)

外輪と内輪との間に複数のころを介装したころ軸受であって、
前記内輪または外輪は、外径または内径部分がころの軌道面とされているとともに、外径または内径部分の軸方向一端に鍔を有し、この鍔と前記軌道面との交差部の円周数ヶ所に潤滑油溜まり用の凹部が設けられている、ころ軸受。A roller bearing having a plurality of rollers interposed between an outer ring and an inner ring,
The inner ring or the outer ring has an outer diameter or an inner diameter portion serving as a raceway surface of the roller, and has a flange at one axial end of the outer diameter or the inner diameter portion, and has a circumference at an intersection of the flange and the raceway surface. Roller bearings with recesses for lubricating oil accumulation at several locations. 前記凹部は、交差部に周溝を設けるとともに、この周溝の円周数ヶ所に所定高さの堰を設けることによって得られている、請求項１のころ軸受。2. The roller bearing according to claim 1, wherein the concave portion is obtained by providing a circumferential groove at an intersection and providing a weir of a predetermined height at several locations on the circumference of the circumferential groove. 前記堰は、接着剤または含油ポリマーからなる、請求項２のころ軸受。The roller bearing according to claim 2, wherein the weir is made of an adhesive or an oil-impregnated polymer.
JP2003039458A 2003-02-18 2003-02-18 Roller bearing and axle bearing device Expired - Fee Related JP4089458B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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JP2003039458A JP4089458B2 (en) 2003-02-18 2003-02-18 Roller bearing and axle bearing device

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014173686A (en) * 2013-03-11 2014-09-22 Nsk Ltd Sealed roll neck bearing
JP2014231898A (en) * 2013-05-30 2014-12-11 日本精工株式会社 Roller bearing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014173686A (en) * 2013-03-11 2014-09-22 Nsk Ltd Sealed roll neck bearing
JP2014231898A (en) * 2013-05-30 2014-12-11 日本精工株式会社 Roller bearing

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