JP2004197761A - Shell roller bearing - Google Patents

Shell roller bearing Download PDF

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Publication number
JP2004197761A
JP2004197761A JP2002363499A JP2002363499A JP2004197761A JP 2004197761 A JP2004197761 A JP 2004197761A JP 2002363499 A JP2002363499 A JP 2002363499A JP 2002363499 A JP2002363499 A JP 2002363499A JP 2004197761 A JP2004197761 A JP 2004197761A
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JP
Japan
Prior art keywords
flange
shell
seal
inner diameter
roller 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.)
Pending
Application number
JP2002363499A
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Japanese (ja)
Inventor
Nobutsuna Motohashi
信綱 本橋
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.)
Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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 Koyo Seiko Co Ltd filed Critical Koyo Seiko Co Ltd
Priority to JP2002363499A priority Critical patent/JP2004197761A/en
Publication of JP2004197761A publication Critical patent/JP2004197761A/en
Pending legal-status Critical Current

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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
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/588—Races of sheet metal
    • 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
    • F16C33/7809—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 needle roller 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
    • 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
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • F16C19/466—Needle bearings with one row or needles comprising needle rollers and an outer ring, i.e. subunit without inner ring

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To eliminate the need for applying costly softening treatment mainly to a collar portion. <P>SOLUTION: The collar portion 23 subjected to carburizing heat treatment concurrently with a cylindrical portion is provided at one axial end of the cylindrical portion 21 of an outer ring 2. A circular elastic seal 8 is fitted into the inner diameter of the collar portion in an elastically compressed condition. A relationship D0≥D2, D3 is established, where D0 is the inner diameter of the collar portion, D2 is the outer diameter of a cage and D3 is the circumscribed circle diameter of a roller held by the cage. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、シェル形ころ軸受に関する。
【０００２】
【従来の技術】
シェル形ころ軸受例えば十字軸継手などに用いられるシェル形針状ころ軸受は、一般に、外輪内周側に円筒形保持器や環状シールを挿入してから鍔部を径方向内向きに後曲げ加工してそれらの抜け出しを防止した構造を有する。このような外輪は、従来では、所要の硬さを得るために全体に浸炭焼入れ処理が施されてから、鍔部の後曲げ加工を可能とするため該鍔部に対して高周波焼鈍等の軟化処理が施される(例えば、特許文献１参照。)。
【０００３】
【特許文献１】
特開２００２−８９５５０号公報(図１２−図１５)
【０００４】
【発明が解決しようとする課題】
上記シェル形針状ころ軸受では、鍔部にコストのかかる軟化処理を施す必要がある。環状シールとして後曲げ加工に際して変形しないようにコストのかかる芯金付きのものを使用する必要がある。鍔部の後曲げ加工に際して硬度が低い鍔部にしわや割れが発生する可能性がある。鍔部は硬度が低くて塑性変形しやすいから軸受組み付け対象に対する圧入時に方向性があり、製品として扱いにくい、などの課題がある。
【０００５】
【課題を解決するための手段】
本発明は、全体が焼入れ硬化されたシェル形外輪が備える鍔部の内径をＤ０、前記シェル形外輪に組み込まれる保持器の外径をＤ２、前記保持器に保持されているころの外接円径をＤ３として、これらが、Ｄ０≧Ｄ２、Ｄ３の関係を満足するように設定されているとともに、前記保持器と鍔部との間には前記鍔部の内径より大きい外径を有する弾性材からなるシールが弾性圧縮状態で装着されていることを特徴とするシェル形針状ころ軸受である。
【０００６】
本発明によると、前記関係により鍔部に後曲げ加工を必要としない構造であるから、外輪に浸炭熱処理を施した後に鍔部にコストがかかる高周波焼鈍や防炭処理などの軟化処理を施す必要がない。つまり、その軟化処理工程を削減できることにより、製造コストを大幅に削減できるようになるとともに、鍔部に後曲げ加工するときに割れなどの発生のおそれがない。鍔部は軟化処理されておらず塑性変形しにくい強度が大きいものとなっているから、外輪の両端部に鍔部があっても軸受組み付け対象に対する圧入時に鍔部に方向性を考える必要が無くなり製品として非常に扱いやすくなる。
【０００７】
そして、特に本発明の場合、保持器はその外径が鍔部の内径より小さいから、簡単に外輪に装着できる一方で、鍔部の内径より大きな外径を有する弾性材からなるシールが弾性圧縮状態で装着されているから、保持器はその外径が鍔部の内径より小さいにもかかわらず抜け止めされることになる。特に、シールが弾性材からなるので、芯金付きシールよりもコストがより安く済む。
【０００８】
本発明は、好ましくは、前記鍔部を軸方向に対して９０度以上当該軸受内方へ曲げ込む。こうした場合、シールの組み込み性や抜け止め性が向上するとともに、ハウジングに外輪を組み込むときの鍔部の強度が向上して好ましい。
【０００９】
【発明の実施の形態】
図面を参照して本発明の実施形態に係るシェル形針状ころ軸受を詳細に説明する。この実施形態のシェル形針状ころ軸受は、例えば十字軸継手の十字軸とヨークとの間に挿入されて十字軸を支持する軸受として使用されるが、その使用対象には限定されない。図１は、本発明の実施形態に係るシェル形針状ころ軸受の断面図、図２は、図１の要部の拡大図である。これらの図を参照して、本発明の実施形態に係るシェル形針状ころ軸受は、シェル形の外輪２、円筒形の保持器４、複数の針状ころ６、および環状の弾性シール８を備える。
【００１０】
外輪２は、円筒部２１と、シール収納部２２と、鍔部２３と、底部２４とを含み、円筒部２１の一方側が底部２４で閉じられた底付きシェル形となっている。保持器４は、周方向等間隔に針状ころ６を収納保持するポケット４１を有し、針状ころ６は、これら各ポケット４１に抜け止めされた状態で１つずつ収納される。
【００１１】
針状ころ６は、各ポケット４１内を径方向内外に若干移動可能な状態で抜け止めされる。針状ころ６を円筒形保持器４の各ポケットに保持させた状態で、針状ころ６を、ポケット４１の内径側に移動させると両者を含む外径は保持器４の外径にほぼ一致させられる。なお、針状ころ６の径方向内方への最大移動位置を二点鎖線で示している。
【００１２】
シール収納部２２は、円筒部２１の軸方向一方側において該円筒部２１に連成され円筒部２１よりもその内径面２６側において薄肉にされて環状弾性シール８を収納できる溝幅を有する環状溝形状になっている。
【００１３】
鍔部２３は、シール収納部２２の軸方向一方側に一体に設けられており、径方向内方に湾曲された形状を有する。鍔部２３は、シール収納部２２よりも薄肉に形成されており、円筒部２１の端部とシール収納部２２との間で弾性シール８の収納に適した溝形状を構成している。
【００１４】
外輪２は、ＳＰＢ２Ｓ等の低炭素鋼からなり、全体に浸炭熱処理されている。つまり、鍔部２３は、二点鎖線で示すようにシール収納部２２方向に延びた状態から折り曲げられ、その後に、外輪２全体が、前記鍔部２３の折り曲げの状態から浸炭熱処理が施されている。上記浸炭熱処理は周知であるから、その説明は省略する。
【００１５】
弾性シール８は、外径形状が円筒面形状とされた芯金無しのゴムや樹脂などの弾性材により構成されている。弾性シール８は、環状の胴体部８１と、この胴体部８１から軸方向一方に向けて肉厚一様とされて延びる径方向外側の環状厚肉部８２と、胴体部８１から軸方向一方側に向かって肉厚一様とされて延びかつ先端に径方向内向きの弾性リップ８３ａを有する径方向内側の環状薄肉部８３とを含む。こうした構造を有する弾性シール８の外径面２５は、シール収納部２２の内径面２６に当接している。なお、弾性シール８の外径面２５の形状は、円筒面形状ばかりでなく、テーパ面形状も考えられる。
【００１６】
弾性シール８は、シール収納部２２に収納されていないときは、二点鎖線で示すような外径を有する。弾性シール８は、シール収納部２２に収納されるとき、その外径面２５は、シール収納部２２の内径面２６により二点鎖線の位置から図示実線のように弾性圧縮され、該内径面２６に全面密着する。弾性シール８の薄肉部８３は、薄肉とされていることで、弾性のリップ８３ａの摺動性や接触性を高めており、その先端のリップ８３ａは外輪２に挿通される不図示の十字軸の外周面に当接することにより当該シェル形針状ころ軸受の内部を外部から密封する。
【００１７】
以上の構成において、鍔部２３の内径をＤ０、円筒部２１の内径をＤ１、保持器４の外径をＤ２とすると、円筒部２１内部に保持器４に針状ころ６を保持させない状態で円筒部２１に保持器４を組み込むときは、これらの間にＤ１≧Ｄ０≧Ｄ２を満足する関係が成立するように、鍔部２３や保持器４が構成されている。
【００１８】
なお、製作公差を考慮する場合には、Ｄ０を鍔部２３の最小内径とみなし、Ｄ２を保持器４の最大外径に真円度０．１ｍｍを加えた値とみなしてもよい。
【００１９】
また、保持器４に針状ころ６が保持されているときは、保持器４に保持された状態での針状ころ６の外接円径をＤ３とすると、Ｄ１≧Ｄ０≧Ｄ３、Ｄ２を満足する関係が成立するように、鍔部２３や保持器４や針状ころ６が構成されている。
【００２０】
この関係においても製作公差を考慮する場合には、Ｄ０を鍔部２３の最小内径とみなし、Ｄ２を保持器４の最大外径に真円度０．１ｍｍを加えた値とみなしてもよい。
【００２１】
このような関係においては、保持器４と針状ころ６とを、鍔部２３を介して、円筒部２１の内部に簡単に組み込むことができる。さらに、弾性シール８を変形させて鍔部２３から嵌め込むことができる。
【００２２】
上述の実施形態の場合、鍔部２３が折り曲げられた状態から保持器４と針状ころ６とを筒部２１内周に挿入することができる構造であるから、外輪２に浸炭熱処理を施した後に鍔部２３にコストのかかる軟化処理を施す必要がない。また、鍔部２３の後曲げ加工が不要であるから、後曲げ加工に際して硬度が低い鍔部２３にしわや割れが発生するおそれは全くない。鍔部２３は浸炭熱処理により硬度が向上して塑性変形しにくいから、外輪２の両端部に鍔部２３があっても軸受組み付け対象に対する圧入時に鍔部２３に方向性が無く製品として扱いやすい。弾性シール８に芯金が不要となり、コストの低減が図れる。弾性シール８は、鍔部２３を介してシール収納部２２に入れ易く、かつ、抜け難い。鍔部２３の内径が、従来よりも大きくなり、軸受組み付け対象に対する圧入時に、その圧入力の作用点が外径側に寄り、モーメント荷重が小さくなって大きな圧入力に耐えることができるようになる。なお、弾性シール８は、芯金無しのものに限らず、鍔部２３を介してシール収納部２２に入れることが可能であれば、芯金付きとしてもよい。
【００２３】
なお、弾性シール８は、図３で示すように、鍔部２３を二点鎖線で示すように延びた状態(軸方向に対して)から所定角度θ＝９０度以上(例えば１３０度程度)軸受内方に曲げ込んだ形状にしてもよい。鍔部２３をこのように軸受内方に曲げ込むと弾性シール８の組み込み性(センタリング、組み込み力の低減)が向上し、鍔部２３との位置決めがより確実となる。さらに、組み込まれた弾性シール８の抜け止め性が向上するとともに、不図示のハウジングに外輪２を組み込むときの鍔部２３の強度が向上する。
【００２４】
【発明の効果】
以上説明したように、本発明によれば、鍔部にコストのかかる軟化処理を施す必要がない、などの効果を発揮できる。
【図面の簡単な説明】
【図１】本発明の実施形態に係るシェル形針状ころ軸受の断面図
【図２】図１の要部の拡大図
【図３】本発明の他の実施形態に係るシェル形針状ころ軸受の要部断面図
【符号の説明】
２ 外輪
２１ 円筒部
２３ 鍔部
４ 保持器
６ 針状ころ
８ 環状弾性シール[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a shell type roller bearing.
[0002]
[Prior art]
Shell-type roller bearings used for shell-type roller bearings, such as cross joints, are generally manufactured by inserting a cylindrical cage or annular seal on the inner peripheral side of the outer ring, and then bending the flange part radially inward. To prevent them from slipping out. Conventionally, such an outer ring is generally carburized and quenched in order to obtain a required hardness, and then softened by high-frequency annealing or the like to the flange in order to enable post-bending of the flange. Processing is performed (for example, refer to Patent Document 1).
[0003]
[Patent Document 1]
JP-A-2002-89550 (FIGS. 12 to 15)
[0004]
[Problems to be solved by the invention]
In the above-described needle needle roller bearing, it is necessary to perform costly softening treatment on the flange. It is necessary to use an annular seal having a costly cored bar so as not to be deformed during post-bending. During post-bending of the flange, wrinkles and cracks may occur in the flange having low hardness. Since the flange portion has low hardness and is easily plastically deformed, there is a problem in that the flange portion has directionality at the time of press-fitting to a bearing assembly target and is difficult to handle as a product.
[0005]
[Means for Solving the Problems]
In the present invention, the inner diameter of a flange provided in a shell-shaped outer ring which is entirely hardened and hardened is D0, the outer diameter of a cage incorporated in the shell-shaped outer ring is D2, and a circumscribed circle diameter of a roller held by the cage. Is set as D3, these are set so as to satisfy the relationship of D0 ≧ D2, D3, and an elastic material having an outer diameter larger than the inner diameter of the flange portion is provided between the retainer and the flange portion. A shell-shaped needle roller bearing characterized in that the seal is mounted in an elastically compressed state.
[0006]
According to the present invention, since the structure does not require post-bending processing of the flange portion due to the above-described relationship, it is necessary to perform softening treatment such as high-frequency annealing or carburization treatment which requires costly after performing carburizing heat treatment on the outer ring. There is no. That is, since the softening process can be reduced, the manufacturing cost can be greatly reduced, and there is no possibility of occurrence of cracks or the like when the flange portion is post-bent. Since the flange is not softened and has high strength to prevent plastic deformation, there is no need to consider the direction of the flange when press-fitting the bearing assembly even if there are flanges at both ends of the outer ring. It becomes very easy to handle as a product.
[0007]
In particular, in the case of the present invention, since the outer diameter of the retainer is smaller than the inner diameter of the flange, the retainer can be easily attached to the outer ring, while the seal made of an elastic material having an outer diameter larger than the inner diameter of the flange is elastically compressed. Since the retainer is mounted in this state, the retainer is prevented from falling even though its outer diameter is smaller than the inner diameter of the flange. In particular, since the seal is made of an elastic material, the cost is lower than that of the seal with the cored bar.
[0008]
In the present invention, preferably, the flange is bent inward of the bearing by 90 degrees or more with respect to the axial direction. In such a case, it is preferable because the incorporation of the seal and the retaining property of the seal are improved, and the strength of the flange portion when the outer ring is incorporated in the housing is improved.
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
A shell needle roller bearing according to an embodiment of the present invention will be described in detail with reference to the drawings. The shell needle roller bearing of this embodiment is used, for example, as a bearing that is inserted between the cross shaft and the yoke of the cross shaft joint to support the cross shaft, but is not limited to its use. FIG. 1 is a cross-sectional view of a shell-type needle roller bearing according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a main part of FIG. With reference to these drawings, a shell-shaped needle roller bearing according to an embodiment of the present invention includes a shell-shaped outer ring 2, a cylindrical cage 4, a plurality of needle rollers 6, and an annular elastic seal 8. Prepare.
[0010]
The outer ring 2 includes a cylindrical portion 21, a seal storage portion 22, a flange portion 23, and a bottom portion 24, and has a bottomed shell shape in which one side of the cylindrical portion 21 is closed by the bottom portion 24. The retainer 4 has pockets 41 for accommodating and holding the needle rollers 6 at equal intervals in the circumferential direction, and the needle rollers 6 are accommodated one by one in a state where the needle rollers 6 are prevented from falling out of the pockets 41.
[0011]
The needle rollers 6 are prevented from falling out in the respective pockets 41 in such a manner that they can be slightly moved in and out in the radial direction. When the needle rollers 6 are moved to the inner diameter side of the pockets 41 while the needle rollers 6 are held in the respective pockets of the cylindrical cage 4, the outer diameter including both of them substantially matches the outer diameter of the cage 4. Let me do. The maximum movement position of the needle roller 6 inward in the radial direction is indicated by a two-dot chain line.
[0012]
The seal accommodating portion 22 has an annular shape having a groove width capable of accommodating the annular elastic seal 8 by being connected to the cylindrical portion 21 on one axial side of the cylindrical portion 21 and being thinner on the inner diameter surface 26 side than the cylindrical portion 21. It has a groove shape.
[0013]
The flange portion 23 is provided integrally on one axial side of the seal storage portion 22 and has a shape curved inward in the radial direction. The flange portion 23 is formed to be thinner than the seal storage portion 22, and forms a groove shape suitable for storing the elastic seal 8 between the end portion of the cylindrical portion 21 and the seal storage portion 22.
[0014]
The outer ring 2 is made of a low carbon steel such as SPB2S and is entirely carburized. That is, the flange portion 23 is bent from a state extending in the direction of the seal storage portion 22 as shown by a two-dot chain line, and thereafter, the entire outer race 2 is subjected to a carburizing heat treatment from the bent state of the flange portion 23. I have. Since the carburizing heat treatment is well known, its description is omitted.
[0015]
The elastic seal 8 is made of an elastic material such as rubber or resin without a metal core having a cylindrical outer diameter. The elastic seal 8 includes an annular body portion 81, a radially outer annular thick portion 82 extending uniformly in the axial direction from the body portion 81 in one axial direction, and one axial side from the body portion 81. And a radially inward annular thin portion 83 having a radially inwardly extending elastic lip 83a at a tip end and having a uniform thickness. The outer diameter surface 25 of the elastic seal 8 having such a structure is in contact with the inner diameter surface 26 of the seal storage portion 22. Note that the shape of the outer diameter surface 25 of the elastic seal 8 may be not only a cylindrical shape but also a tapered shape.
[0016]
The elastic seal 8 has an outer diameter as shown by a two-dot chain line when not stored in the seal storage portion 22. When the elastic seal 8 is accommodated in the seal accommodating portion 22, the outer diameter surface 25 is elastically compressed by the inner diameter surface 26 of the seal accommodating portion 22 from the position of the two-dot chain line as shown by the solid line in the drawing. Adhere to the entire surface. Since the thin portion 83 of the elastic seal 8 is made thin, the slidability and the contact property of the elastic lip 83a are enhanced, and the lip 83a at the tip thereof is a cross shaft (not shown) inserted through the outer ring 2. By contacting the outer peripheral surface of the shell-shaped needle roller bearing, the inside of the shell-shaped needle roller bearing is sealed from the outside.
[0017]
In the above configuration, assuming that the inner diameter of the flange portion 23 is D0, the inner diameter of the cylindrical portion 21 is D1, and the outer diameter of the retainer 4 is D2, the needle roller 6 is not held by the retainer 4 inside the cylindrical portion 21. When the retainer 4 is incorporated into the cylindrical portion 21, the flange portion 23 and the retainer 4 are configured so that a relationship satisfying D1 ≧ D0 ≧ D2 is established between them.
[0018]
When manufacturing tolerance is taken into consideration, D0 may be regarded as the minimum inner diameter of the flange portion 23, and D2 may be regarded as a value obtained by adding 0.1 mm of roundness to the maximum outer diameter of the retainer 4.
[0019]
Further, when the needle rollers 6 are held by the retainer 4, when the circumscribed circle diameter of the needle rollers 6 held by the retainer 4 is D3, D1 ≧ D0 ≧ D3 and D2 are satisfied. The flange portion 23, the retainer 4, and the needle rollers 6 are configured so that the following relationship is established.
[0020]
In this relation, when manufacturing tolerances are taken into consideration, D0 may be regarded as the minimum inner diameter of the flange portion 23, and D2 may be regarded as a value obtained by adding 0.1 mm of roundness to the maximum outer diameter of the retainer 4.
[0021]
In such a relationship, the retainer 4 and the needle roller 6 can be easily incorporated into the cylindrical portion 21 via the flange portion 23. Furthermore, the elastic seal 8 can be deformed and fitted from the flange 23.
[0022]
In the case of the above-described embodiment, the outer ring 2 is subjected to a carburizing heat treatment because the retainer 4 and the needle rollers 6 can be inserted into the inner periphery of the cylindrical portion 21 when the flange portion 23 is bent. There is no need to apply a costly softening process to the collar 23 later. Further, since the post-bending process of the flange portion 23 is unnecessary, there is no possibility that wrinkles or cracks are generated in the flange portion 23 having low hardness during the post-bending process. Since the hardness of the flange portion 23 is improved by the carburizing heat treatment and the plastic portion is hardly deformed, even if the flange portion 23 is provided at both ends of the outer ring 2, the flange portion 23 has no direction at the time of press-fitting to a bearing assembly target and is easy to handle as a product. A core is not required for the elastic seal 8, and the cost can be reduced. The elastic seal 8 is easily inserted into the seal storage section 22 through the flange section 23 and is hard to come off. The inner diameter of the flange portion 23 becomes larger than before, and the point of action of the press input shifts to the outer diameter side when press-fitting the bearing assembly object, so that the moment load is reduced and it is possible to withstand a large press input. . Note that the elastic seal 8 is not limited to the one without a core bar, but may be provided with a core bar as long as it can be inserted into the seal storage portion 22 via the flange portion 23.
[0023]
As shown in FIG. 3, the elastic seal 8 has a predetermined angle θ = 90 degrees or more (for example, about 130 degrees) from a state (with respect to the axial direction) in which the flange 23 extends as shown by a two-dot chain line. The shape may be bent inward. When the flange portion 23 is bent inward in the bearing in this manner, the incorporation of the elastic seal 8 (centering, reduction of the assembling force) is improved, and the positioning with the flange portion 23 becomes more reliable. Further, the retaining property of the built-in elastic seal 8 is improved, and the strength of the flange portion 23 when the outer ring 2 is built in a housing (not shown) is improved.
[0024]
【The invention's effect】
As described above, according to the present invention, it is possible to exert an effect that it is not necessary to perform costly softening treatment on the flange portion.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a shell needle roller bearing according to an embodiment of the present invention. FIG. 2 is an enlarged view of a main part of FIG. 1. FIG. 3 is a shell needle roller according to another embodiment of the present invention. Cross section of main part of bearing
2 Outer ring 21 Cylindrical part 23 Flange part 4 Cage 6 Needle roller 8 Ring elastic seal

Claims (2)

全体が焼入れ硬化されたシェル形外輪が備える鍔部の内径をＤ０、前記シェル形外輪に組み込まれる保持器の外径をＤ２、前記保持器に保持されているころの外接円径をＤ３として、これらが、Ｄ０≧Ｄ２、Ｄ３の関係を満足するように設定されているとともに、前記保持器と鍔部との間には前記鍔部の内径より大きい外径を有する弾性材からなるシールが弾性圧縮状態で装着されている、ことを特徴とするシェル形ころ軸受。The inner diameter of the flange provided in the shell-shaped outer ring, which is entirely hardened and hardened, is D0, the outer diameter of the cage incorporated in the shell-shaped outer ring is D2, and the circumscribed circle diameter of the rollers held by the cage is D3. These are set so as to satisfy the relationship of D0 ≧ D2, D3, and a seal made of an elastic material having an outer diameter larger than the inner diameter of the flange is provided between the retainer and the flange. A shell-type roller bearing mounted in a compressed state. 請求項１に記載のシェル形ころ軸受において、
前記鍔部を軸方向に対して９０度以上当該軸受内方へ曲げ込んでいる、ことを特徴とするシェル形ころ軸受。The shell-type roller bearing according to claim 1,
A shell-type roller bearing, wherein the flange is bent at least 90 degrees into the bearing in the axial direction.
JP2002363499A 2002-12-16 2002-12-16 Shell roller bearing Pending JP2004197761A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002363499A JP2004197761A (en) 2002-12-16 2002-12-16 Shell roller bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002363499A JP2004197761A (en) 2002-12-16 2002-12-16 Shell roller bearing

Publications (1)

Publication Number Publication Date
JP2004197761A true JP2004197761A (en) 2004-07-15

Family

ID=32761634

Family Applications (1)

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Country Status (1)

Country Link
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008138836A (en) * 2006-12-05 2008-06-19 Ntn Corp Shell-shaped roller bearing and shell-shaped roller bearing structure
JP2008138837A (en) * 2006-12-05 2008-06-19 Ntn Corp Shell type roller bearing and shell type roller bearing structure
JP2012081945A (en) * 2010-09-17 2012-04-26 Jtekt Corp Steering device
JP2012167781A (en) * 2011-02-16 2012-09-06 Nsk Ltd Shell type needle bearing
CN114749878A (en) * 2022-06-01 2022-07-15 大连冶金轴承股份有限公司 Bearing outer ring machining method

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008138836A (en) * 2006-12-05 2008-06-19 Ntn Corp Shell-shaped roller bearing and shell-shaped roller bearing structure
JP2008138837A (en) * 2006-12-05 2008-06-19 Ntn Corp Shell type roller bearing and shell type roller bearing structure
JP2012081945A (en) * 2010-09-17 2012-04-26 Jtekt Corp Steering device
JP2012167781A (en) * 2011-02-16 2012-09-06 Nsk Ltd Shell type needle bearing
CN114749878A (en) * 2022-06-01 2022-07-15 大连冶金轴承股份有限公司 Bearing outer ring machining method
CN114749878B (en) * 2022-06-01 2024-01-16 大连冶金轴承股份有限公司 Bearing outer ring machining method

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