JP3907820B2 - Angular contact ball bearings - Google Patents

Angular contact ball bearings Download PDF

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Publication number
JP3907820B2
JP3907820B2 JP07691998A JP7691998A JP3907820B2 JP 3907820 B2 JP3907820 B2 JP 3907820B2 JP 07691998 A JP07691998 A JP 07691998A JP 7691998 A JP7691998 A JP 7691998A JP 3907820 B2 JP3907820 B2 JP 3907820B2
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diameter
counter
inner ring
cage
ring
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JP07691998A
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Japanese (ja)
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JPH11270563A (en
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梅光 小林
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NTN Corp
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NTN Corp
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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
    • F16C33/38—Ball cages
    • F16C33/42—Ball cages made from wire or sheet metal strips
    • F16C33/422—Ball cages made from wire or sheet metal strips made from sheet metal
    • F16C33/425—Ball cages made from wire or sheet metal strips made from sheet metal from a single part, e.g. ribbon cages with one corrugated annular part
    • 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
    • F16C33/38—Ball cages
    • F16C33/3806—Details of interaction of cage and race, e.g. retention, centring
    • 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
    • F16C19/16—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 a single row of balls
    • F16C19/163—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 a single row of balls with angular contact
    • 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
    • F16C19/54—Systems consisting of a plurality of bearings with rolling friction
    • F16C19/546—Systems with spaced apart rolling bearings including at least one angular contact bearing
    • F16C19/547—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings
    • F16C19/548—Systems with spaced apart rolling bearings including at least one angular contact bearing with two angular contact rolling bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C43/00—Assembling bearings
    • F16C43/04—Assembling rolling-contact bearings
    • F16C43/06—Placing rolling bodies in cages or bearings

Description

【０００１】
【発明の属する技術分野】
この発明は、内外輪を締まり嵌め状態として使用される、例えば減速装置用のアンギュラ玉軸受に関する。
【０００２】
【従来の技術と発明が解決しようとする課題】
一般に、アンギュラ玉軸受は、内外輪が非分離となっている。使用条件によって、例えば内外輪が締まり嵌めで使用される場合は、内輪，ボール，および保持器からなるアセンブリ品を軸に圧入し、外輪をハウジングに圧入する構成が採られることがある。すなわち、外輪分離形とされる。
このような外輪分離形のアンギュラ玉軸受とした場合、保持器に保持されたボールの配列と軌道輪のカウンタ部との締め代を確保しながら、軸受の組み立てが可能なように、保持器を樹脂製とし、保持器にある程度の弾性変形を許す構造が採られる。
【０００３】
しかし、軸受が大きくなると、樹脂で保持器を製作する場合、設備や金型にかかる費用が多大なものとなる。そのため、通常の鉄板保持器とすることが望まれるが、組立性や使用時の非分離性の確保が難しく、鉄板保持器を用いた外輪分離形のアンギュラ玉軸受は、実用化されるに至っていない。
【０００４】
例えば、図４に示すようなアンギュラ玉軸受において、保持器５４が鉄板等のように弾性変形の生じ難い材質である場合、保持器５４にボール５３を入れたときの内接径Ａ（図示せず）よりも内輪５１のカウンタ部５１ａの外径Ｃを大きくすることにより、組み立て後に内輪５１が分離することが無くなるが、直径締め代（Ｃ−Ａ）が大きいと、保持器５４が無理な変形を生じ、また小さいと分離することになる。
また、図５に示すように、分解時に外輪５２を下にして内輪５１を持ち上げる場合、内輪５１のカウンタ部５１ａの外径面でボール５３が押されることによって、ボール５３が外輪５２のカウンタ部５２ａに押し付けられる。この押し付け力が働くために、外輪５２からボール５３を分離する作業が難いことがある。
【０００５】
この発明の目的は、保持器に無理な変形を生じさせることなく、内輪に対して保持器およびボールを容易に組み立てることができ、かつ組み立て後に内輪が分離することのない外輪分離形のアンギュラ玉軸受を提供することである。
この発明の他の目的は、分解時に、内輪，保持器，およびボールの組立部品を外輪から円滑に抜き出すことができるようにすることである。
【０００６】
【課題を解決するための手段】
この発明の請求項１記載のアンギュラ玉軸受は、外輪分離形のアンギュラ玉軸受において、内輪のカウンタ部の外径（Ｃ）を、保持器のみで保持された状態のボールの配列の内接径（Ａ）よりも大きくし、これら内輪カウンタ外径（Ｃ）と内接径（Ａ）との間の直径締め代（Ｃ−Ａ）を、ボール径（ｄ）に対して、内輪をボール配列に押し込むときに保持器が変形しなくかつ組み立て後に分離しない所定の割合範囲としたものである。前記保持器は、鉄板を成形したリング状の鉄板保持器であって、円周方向に等配された複数個所の円形のポケット内にボールを保持するものである。また、このアンギュラ玉軸受は、外輪および内輪がそれぞれハウジングおよび回転部材に締まり嵌めされるものである。
この構成によると、保持器にボールを入れたときの内接径（Ａ）よりも内輪のカウンタ部の外径（Ｃ）を大きくしたため、組み立て後に内輪が分離することが無くなる。この場合に、直径締め代（Ｃ−Ａ）が大きいと、保持器が無理な変形を生じ、また小さいと分離することになる。そこで、この発明は、内輪カウンタ外径（Ｃ）と内接径（Ａ）との間の直径締め代（Ｃ−Ａ）を、ボール径（ｄ）に対して、内輪をボール配列に押し込むときに保持器が変形しなくかつ組み立て後に分離しない所定の割合範囲としたものである。
この所定の割合範囲は、（直径締め代（Ｃ−Ａ））／（ボール径ｄ）の値が、０．０３〜０．１０となる範囲とすることが望ましい。
【０００７】
また、この発明のアンギュラ玉軸受は、外輪のカウンタ部に、軌道溝の溝底径よりも大きい内径となるカウンタ広がり部を設ける。
このように外輪にカウンタ広がり部を設けることにより、分解時に、内輪，保持器，およびボールの組立部品を外輪から円滑に抜き出すことができる。すなわち、分解時にボールが内輪のカウンタ部で押されて外輪のカウンタ部に押し付けられても、カウンタ広がり部にボールが逃げ、分解が容易となる。
【０００８】
外輪のカウンタ部は、軌道溝の溝底から円筒面状に延びる平坦部と、この平坦部よりも内径が大きなカウンタ広がり部とでなるものとする。前記平坦部は前記カウンタ広がり部よりも軸方向に短くする。この平坦部は、寸法管理が容易であり、分離性の向上のために、できるだけ狭くすることが好ましい。
また、外輪のカウンタ広がり部の内径（Ｄ）は、保持器のみで保持された状態のボールの配列の外接径（Ｋ）よりも大きくすることが好ましい。これにより、一層、分離が容易となる。
【００１０】
【発明の実施の形態】
この発明の一実施形態を図１および図２に基づいて説明する。このアンギュラ玉軸受は、外輪分離形であって、内輪１と外輪２の間に、保持器４に保持されたボール３を介在させたものである。保持器４は、鉄板を成形したリング状の鉄板保持器であり、円周方向に等配された複数個所の円形のポケット５内にボール３を保持している。内輪１および外輪２は、いずれも、軌道溝の片側の肩部を無くした部分であるカウンタ部１ａ，２ａを有している。
【００１１】
内輪１のカウンタ部１ａは、軌道溝１１の溝底径よりも若干大きな外径で、軌道溝１１から円筒面状に延びる平坦部８と、この平坦部８よりも外径が小さなカウンタ広がり部９とでなる。カウンタ広がり部９は、平坦部８から次第に外径が小さくなるテーパ部分と、このテーパ部分から同じ外径で内輪１の幅面まで続く部分とで構成される。
外輪２のカウンタ部２ａは、軌道溝１２の溝底から円筒面状に延びる平坦部６と、この平坦部６よりも内径が大きなカウンタ広がり部７とでなる。平坦部６は、カウンタ広がり部７よりも軸方向に短く、できるだけ幅狭とされている。
【００１２】
各部の寸法関係を説明する。内輪１のカウンタ部１ａの外径Ｃは、保持器４のみで保持された状態のボール３の配列の内接径Ａよりも大きくする。すなわち、Ｃ＞Ａである。
これら内輪カウンタ外径Ｃと内接径Ａとの間の直径締め代（Ｃ−Ａ）は、ボール径ｄに対して、（Ｃ−Ａ）／ｄの値が、０．０３〜０．１０となる範囲とする。すなわち、０．０３≦（Ｃ−Ａ）／ｄ≦０．１０である。
内輪１のカウンタ広がり部１ａの外径Ｂは、前記ボール３の配列の内接径Ａよりも小さくする。すなわち、Ｂ＜Ａとする。
外輪２のカウンタ広がり部７の内径Ｄは、保持器４のみで保持された状態のボール３の配列の外接径Ｋよりも大きくする。すなわち、Ｋ＜Ｄである。
【００１３】
この構成のアンギュラ玉軸受によると、保持器４にボール３を入れたときの内接径Ａよりも内輪１のカウンタ部１ａの外径Ｃを大きくしたため、組み立て後に内輪１が分離することが無い。また、内輪カウンタ外径Ｃと前記内接径Ａとの間の直径締め代（Ｃ−Ａ）を、ボール径ｄに対して、（Ｃ−Ａ）／ｄの値が、０．０３〜０．１０となる範囲に設定したため、内輪１をボール３の配列に押し込むときに保持器４を変形させずに容易に組み込むことができ、かつ組み立て後に分離しない。内輪１にカウンタ広がり部９を設け、その外径Ｂを前記内接径Ａよりも小さくしたことからも、内輪１が組み込み易くなる。
また、外輪２のカウンタ部２ａに、軌道溝１２の溝底径よりも大きい内径となるカウンタ広がり部７を外輪幅面に開口して設けたため、内輪アセンブリを外輪２から抜くときに円滑に抜くことができる。例えば、図２のように、分解時に外輪２を下にして内輪１を持ち上げる場合に、ボール３が内輪１のカウンタ部１ａで押されて外輪２のカウンタ部２ａに押し付けられても、カウンタ広がり部７にボールが逃げ、分解が容易となる。
【００１４】
つぎに、このアンギュラ玉軸受を用いた回転部材支持構造の一例を図３と共に説明する。ハウジング２１に、一対のアンギュラ玉軸受２０，２０を介して、回転部材２２が回転自在に支持されている。両アンギュラ玉軸受２０，２０は互いに背面を向けて設置される。ハウジング２１の回転部材貫通孔２３の内径面は、両側の開口部が軸受嵌合面２３ａとなり、これら軸受嵌合面２３ａの奥側に、内径側へ続く段面２３ｂが形成されている。回転部材２２は、全体が軸部材であっても良く、あるいは筒状やリング状の部材、例えば遊星歯車装置における遊星ギヤ支持ヨーク等の減速機構成部品であっても良い。回転部材２２は、アンギュラ玉軸受２０の内輪が嵌合する外径の軸部２２ａを有し、軸部２２ａの一端に外径側へ延びる段面２２ｂが形成されている。軸部２２ａの軸受設置個所よりも他端側には雄ねじ部２２ｃが設けられ、軸受内輪１を締め付けるナット２４が螺合される。
【００１５】
組込みに際しては、ハウジング２１の両側から各軸受嵌合面２３ａにアンギュラ玉軸受２０の外輪２を圧入し、段面２３ｂに係合させる。回転部材２２には、まず奥側のアンギュラ玉軸受２０の内輪アセンブリ１Ａを軸端から組み込み、最後に軸端側の内輪アセンブリ１Ｂを組み込んでナット２４で締め込み、所定の軸受隙間を得る。内輪アセンブリ１Ａ，１Ｂは、保持器４に保持されたボール３を内輪１に組み込んだ組立部品である。奥側のアンギュラ玉軸受２０の内輪アセンブリ１Ａの内輪１は、軸部２２ａに、例えば圧入により取付ける。
分解に際しては、ナット２４を外し、回転部材２２を矢印方向に抜く。このとき、奥側の内輪アセンブリ１Ａは回転部材２２と一緒に抜けるが、この発明のアンギュラ玉軸受２０を採用することにより、スムースに抜ける。
【００１６】
このように、このアンギュラ玉軸受２０は、ハウジング２１と回転部材２２との両方に締まり嵌めされる部位に使用できる。また、この構成の回転部材支持構造では、その分解時にアンギュラ玉軸受２０を内輪１，保持器４，およびボール３の組み立て部品である内輪アセンブリ１Ａと外輪２とに分割可能とすることが必要であるが、このような使用形態において、このアンギュラ玉軸受２０の前記の各効果が有効に発揮される。
【００１７】
【発明の効果】
この発明のアンギュラ玉軸受は、内輪のカウンタ部の外径を、保持器のみで保持された状態のボールの配列の内接径よりも大きくし、これら内輪カウンタ外径と内接径との間の直径締め代を、ボール径に対して、内輪をボール配列に押し込むときに保持器が変形しなくかつ組み立て後に分離しない所定の割合範囲としたものであるため、外輪分離形でありながら、保持器に無理な変形を生じさせることなく、内輪に対して保持器およびボールを容易に組み立てることができ、かつ組み立て後に内輪が分離することがない。
前記所定の割合範囲は、（直径締め代（Ｃ−Ａ））／（ボール径ｄ）の値が、０．０３〜０．１０となる範囲としたため、この組み立て性の向上、および内輪分離の防止の各効果が良好に得られる。
また、外輪のカウンタ部に、軌道溝の溝底径よりも大きい内径となるカウンタ広がり部を設けたものであるため、分解時に、内輪，保持器，およびボールの組立部品を外輪から円滑に抜き出すことができる。
外輪のカウンタ部が、軌道溝の溝底から円筒面状に延びる平坦部と、この平坦部よりも内径が大きなカウンタ広がり部とでなり、前記平坦部を前記カウンタ広がり部よりも軸方向に短くしたため、より一層円滑に抜き出すことができる。
また、外輪のカウンタ広がり部の内径を、保持器のみで保持された状態のボールの配列の外接径よりも小さくした場合も、より一層円滑に抜き出すことができる。
この発明のアンギュラ玉軸受は、このように、保持器に無理な変形を生じさせることなく、内輪に対して保持器およびボールを容易に組み立てることができ、かつ組み立て後に内輪が分離することがなく、しかも分解時には、内輪，保持器，およびボールの組立部品を外輪から円滑に抜き出すことができる。
【図面の簡単な説明】
【図１】（Ａ）はこの発明の一実施形態にかかるアンギュラ玉軸受の部分断面図、（Ｂ）はその保持器とボールの関係を示す部分断面図である。
【図２】同アンギュラ玉軸受の分解動作の説明図である。
【図３】同アンギュラ玉軸受を応用した回転部材支持構造の断面図である。
【図４】従来例の部分断面図である。
【図５】従来例の分解動作の説明図である。
【符号の説明】
１…内輪 ３…ボール
１ａ…カウンタ部 ４…保持器
２…外輪 ６…平坦部
２ａ…カウンタ部 ７…カウンタ広がり部[0001]
BACKGROUND OF THE INVENTION
The present invention, Ru is used as a state close fit an inner outer ring, to angular contact ball bearing for deceleration device, for example.
[0002]
[Prior art and problems to be solved by the invention]
Generally, the angular ball bearing has an inner and outer ring that is not separated. Depending on the use conditions, for example, when the inner and outer rings are used with an interference fit, a configuration may be adopted in which an assembly consisting of an inner ring, a ball, and a cage is pressed into the shaft and the outer ring is pressed into the housing. That is, the outer ring is separated.
In the case of such an outer ring separated angular contact ball bearing, the cage must be mounted so that the bearing can be assembled while securing the allowance between the arrangement of the balls held in the cage and the counter part of the raceway ring. The structure is made of resin and allows the cage to be elastically deformed to some extent.
[0003]
However, when the bearing becomes large, when the cage is made of resin, the cost for the equipment and the mold becomes large. For this reason, it is desirable to use a normal iron plate cage, but it is difficult to ensure assemblability and non-separability during use. Outer ring angular contact ball bearings using an iron plate cage have come into practical use. Not in.
[0004]
For example, in an angular contact ball bearing as shown in FIG. 4, when the cage 54 is made of a material that hardly undergoes elastic deformation such as an iron plate, an inscribed diameter A (not shown) when the ball 53 is placed in the cage 54. The outer ring C of the counter part 51a of the inner ring 51 is made larger than the inner ring 51, so that the inner ring 51 is not separated after assembly. However, if the diameter tightening allowance (C-A) is large, the cage 54 is impossible. Deformation occurs, and if it is small, it will separate.
Further, as shown in FIG. 5, when the inner ring 51 is lifted with the outer ring 52 down when disassembled, the ball 53 is pushed by the outer diameter surface of the counter part 51 a of the inner ring 51, so that the ball 53 becomes counter part of the outer ring 52. 52a. Since this pressing force works, it may be difficult to separate the ball 53 from the outer ring 52.
[0005]
An object of the present invention is to make it possible to easily assemble a cage and a ball with respect to an inner ring without causing excessive deformation of the cage, and to separate an outer ring angular ball from which the inner ring is not separated after assembly. It is to provide a bearing.
Another object of the present invention is to enable the inner ring, the cage, and the ball assembly parts to be smoothly extracted from the outer ring during disassembly.
[0006]
[Means for Solving the Problems]
The angular contact ball bearing according to claim 1 of the present invention is the angular contact ball bearing of the outer ring separation type, wherein the outer diameter (C) of the counter part of the inner ring is the inscribed diameter of the array of balls held only by the cage. The diameter of the inner ring counter (C) and the inscribed diameter (A) is larger than (A), and the inner diameter of the inner ring is arranged with respect to the ball diameter (d). The cage has a predetermined ratio range in which the cage does not deform when pushed into the casing and does not separate after assembly. The cage is a ring-shaped iron plate cage formed of an iron plate, and holds balls in a plurality of circular pockets equally distributed in the circumferential direction. In this angular ball bearing, the outer ring and the inner ring are fitted into the housing and the rotating member, respectively .
According to this configuration, since the outer diameter (C) of the counter part of the inner ring is made larger than the inscribed diameter (A) when the ball is put into the cage, the inner ring is not separated after assembly. In this case, if the diameter tightening allowance (CA) is large, the cage is deformed excessively, and if it is small, it is separated. Therefore, in the present invention, when the inner ring counter is pushed into the ball arrangement with respect to the ball diameter (d), the diameter allowance (CA) between the outer diameter (C) of the inner ring counter and the inscribed diameter (A). In addition, the cage does not deform and does not separate after assembly.
The predetermined ratio range is desirably a range in which the value of (diameter tightening allowance (CA)) / (ball diameter d) is 0.03 to 0.10.
[0007]
Further, angular ball bearing of the present invention, the counter portion of the outer ring, Ru provided counter expanded portion serving as a larger inner diameter than the groove bottom diameter of the raceway groove.
By providing the counter spreading portion on the outer ring in this way, the assembled parts of the inner ring, the cage, and the ball can be smoothly extracted from the outer ring at the time of disassembly. That is, even when the ball is pushed by the counter part of the inner ring and pressed against the counter part of the outer ring at the time of disassembly, the ball escapes to the counter spreading part and is easily disassembled.
[0008]
Counter portion of the outer ring is a flat portion extending from the groove bottom of the raceway groove in a cylindrical surface shape, and that inner diameter than the flat portion is at the large counter expanded portion. The flat portion is shorter in the axial direction than the counter spreading portion. The flat portion is easy to control the dimensions, and is preferably as narrow as possible in order to improve separability.
Further, it is preferable that the inner diameter (D) of the counter spreading portion of the outer ring is larger than the outer diameter (K) of the array of balls held only by the cage. This further facilitates separation.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. This angular ball bearing is a separated outer ring type, and a ball 3 held by a cage 4 is interposed between an inner ring 1 and an outer ring 2. The cage 4 is a ring-shaped iron plate cage in which an iron plate is formed, and holds the balls 3 in a plurality of circular pockets 5 that are equally arranged in the circumferential direction. Each of the inner ring 1 and the outer ring 2 has counter portions 1a and 2a that are portions where the shoulder portion on one side of the raceway groove is eliminated.
[0011]
The counter part 1a of the inner ring 1 has an outer diameter slightly larger than the groove bottom diameter of the raceway groove 11, a flat part 8 extending in a cylindrical surface from the raceway groove 11, and a counter spreading part having an outer diameter smaller than that of the flat part 8. Nine. Counter spreading unit 9 is composed of a flat portion 8 and the tapered portion having an outer diameter smaller gradually, and part following the width Menma of the inner ring 1 with the same outer diameter from the tapered portion.
The counter part 2 a of the outer ring 2 includes a flat part 6 extending in a cylindrical surface from the groove bottom of the raceway groove 12 and a counter spreading part 7 having an inner diameter larger than that of the flat part 6. The flat part 6 is shorter in the axial direction than the counter spreading part 7 and is as narrow as possible.
[0012]
The dimensional relationship of each part will be described. The outer diameter C of the counter portion 1a of the inner ring 1 is set to be larger than the inscribed diameter A of the array of balls 3 held by the cage 4 alone. That is, C> A.
The diameter allowance (CA) between the inner ring counter outer diameter C and the inscribed diameter A has a value of (CA) / d of 0.03 to 0.10 with respect to the ball diameter d. The range is as follows. That is, 0.03 ≦ (C−A) /d≦0.10.
The outer diameter B of the counter spreading portion 1 a of the inner ring 1 is made smaller than the inscribed diameter A of the ball 3 array. That is, B <A.
The inner diameter D of the counter spreading portion 7 of the outer ring 2 is made larger than the circumscribed diameter K of the array of balls 3 held by the cage 4 alone. That is, K <D.
[0013]
According to the angular ball bearing of this configuration, the outer diameter C of the counter portion 1a of the inner ring 1 is made larger than the inner diameter A when the ball 3 is put in the cage 4, so that the inner ring 1 is not separated after assembly. . Further, the diameter allowance (CA) between the outer diameter C of the inner ring counter and the inscribed diameter A is set such that the value of (CA) / d is 0.03 to 0 with respect to the ball diameter d. Since the range is set to 10.10, the cage 4 can be easily assembled without being deformed when the inner ring 1 is pushed into the array of balls 3, and is not separated after assembly. Since the inner ring 1 is provided with the counter spreading portion 9 and its outer diameter B is smaller than the inscribed diameter A, the inner ring 1 can be easily assembled.
Further, since the counter spread portion 7 having an inner diameter larger than the groove bottom diameter of the raceway groove 12 is provided in the counter portion 2a of the outer ring 2 so as to open in the outer ring width surface, the inner ring assembly is smoothly pulled out when being pulled out from the outer ring 2. Can do. For example, as shown in FIG. 2, when the inner ring 1 is lifted with the outer ring 2 down when disassembled, the counter spreads even if the ball 3 is pushed by the counter unit 1a of the inner ring 1 and pressed against the counter unit 2a of the outer ring 2. The ball escapes to the portion 7 and is easily disassembled.
[0014]
Next, an example of a rotating member support structure using this angular ball bearing will be described with reference to FIG. A rotating member 22 is rotatably supported by the housing 21 via a pair of angular ball bearings 20 and 20. Both angular ball bearings 20, 20 are installed with their backs facing each other. The inner diameter surface of the rotating member through-hole 23 of the housing 21 has bearing openings 23a on both sides, and a step surface 23b is formed on the inner side of the bearing fitting surface 23a. The rotating member 22 may be a shaft member as a whole, or may be a cylindrical or ring-shaped member, for example, a speed reducer component such as a planetary gear support yoke in a planetary gear device. The rotating member 22 has an outer diameter shaft portion 22a into which the inner ring of the angular ball bearing 20 is fitted, and a step surface 22b extending toward the outer diameter side is formed at one end of the shaft portion 22a. A male screw portion 22c is provided on the other end side of the bearing portion of the shaft portion 22a, and a nut 24 for tightening the bearing inner ring 1 is screwed together.
[0015]
When assembled, the outer ring 2 of the angular ball bearing 20 is press-fitted into each bearing fitting surface 23a from both sides of the housing 21 and engaged with the step surface 23b. First, the inner ring assembly 1A of the rear angular ball bearing 20 is assembled from the shaft end into the rotating member 22, and finally the inner ring assembly 1B of the shaft end side is assembled and tightened with the nut 24 to obtain a predetermined bearing clearance. The inner ring assemblies 1 </ b> A and 1 </ b> B are assembled parts in which the balls 3 held by the cage 4 are incorporated in the inner ring 1. The inner ring 1 of the inner ring assembly 1A of the rear angular ball bearing 20 is attached to the shaft portion 22a by, for example, press-fitting.
At the time of disassembly, the nut 24 is removed and the rotating member 22 is pulled out in the direction of the arrow. At this time, the inner ring assembly 1 </ b> A on the back side comes out together with the rotating member 22, but it comes out smoothly by adopting the angular ball bearing 20 of the present invention.
[0016]
As described above, the angular ball bearing 20 can be used for a portion that is tightly fitted to both the housing 21 and the rotating member 22. Further, in the rotating member support structure with this configuration, it is necessary that the angular ball bearing 20 can be divided into the inner ring assembly 1A and the outer ring 2 that are assembled parts of the inner ring 1, the retainer 4, and the ball 3 when disassembled. However, in such a usage pattern, the above-described effects of the angular ball bearing 20 are effectively exhibited.
[0017]
【The invention's effect】
Angular contact ball bearing of the invention, the outer diameter of the inner ring of the counter portion, larger than the inscribed diameter of the array of balls in a state of being held only by the retainer, the inscribed diameter and inner ring counter OD Since the diameter interference between them is a predetermined ratio range in which the cage does not deform and does not separate after assembly when the inner ring is pushed into the ball arrangement with respect to the ball diameter, Without causing excessive deformation of the cage, the cage and the ball can be easily assembled to the inner ring, and the inner ring is not separated after assembly.
It said predetermined ratio range, the value of (diameter interference (C-A)) / (ball diameter d) is, due to the range to be 0.03 to 0.10, the assembling property improvements, and the inner ring separation Each effect of prevention can be obtained satisfactorily.
Also, since the counter portion of the outer ring is provided with a counter spreading portion having an inner diameter larger than the groove bottom diameter of the raceway groove, the inner ring, cage and ball assembly parts can be smoothly extracted from the outer ring at the time of disassembly. be able to.
The counter part of the outer ring is composed of a flat part extending in a cylindrical surface from the groove bottom of the raceway groove and a counter spread part having a larger inner diameter than the flat part, and the flat part is shorter in the axial direction than the counter spread part. for the, it can be withdrawn even more smoothly.
Further, even when the inner diameter of the counter spread portion of the outer ring is made smaller than the circumscribed diameter of the array of balls held only by the cage, the outer ring can be extracted more smoothly.
Angular contact ball bearing of the present invention is thus, without causing excessive deformation hold device can be assembled easily retainer and balls against the inner ring and the inner ring are separated after assembly In addition, when disassembling, the inner ring, the cage, and the ball assembly can be smoothly extracted from the outer ring.
[Brief description of the drawings]
FIG. 1A is a partial cross-sectional view of an angular ball bearing according to an embodiment of the present invention, and FIG. 1B is a partial cross-sectional view showing the relationship between the cage and balls.
FIG. 2 is an explanatory view of a disassembling operation of the angular ball bearing.
FIG. 3 is a cross-sectional view of a rotating member support structure to which the angular ball bearing is applied.
FIG. 4 is a partial cross-sectional view of a conventional example.
FIG. 5 is an explanatory diagram of a conventional disassembling operation.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Inner ring 3 ... Ball 1a ... Counter part 4 ... Cage 2 ... Outer ring 6 ... Flat part 2a ... Counter part 7 ... Counter spreading | diffusion part

Claims (2)

外輪分離形のアンギュラ玉軸受において、内輪のカウンタ部の外径（Ｃ）を、保持器のみで保持された状態のボールの配列の内接径（Ａ）よりも大きくし、これら内輪カウンタ外径（Ｃ）と内接径（Ａ）との間の直径締め代（Ｃ−Ａ）を、
（直径締め代（Ｃ−Ａ））／（ボール径ｄ）
の値が、０．０３〜０．１０となる範囲とし、
外輪のカウンタ部が、軌道溝の溝底から円筒面状に延びる平坦部と、この平坦部よりも内径が大きなカウンタ広がり部とでなり、前記平坦部は前記カウンタ広がり部よりも軸方向に短くし、
前記保持器が、鉄板を成形したリング状の鉄板保持器であって、円周方向に等配された複数個所の円形のポケット内にボールを保持するものであり、外輪および内輪が、それぞれハウジングおよび回転部材に締まり嵌めされるものであるアンギュラ玉軸受。In the outer ring separated angular contact ball bearing, the outer diameter (C) of the counter part of the inner ring is made larger than the inner diameter (A) of the array of balls held only by the cage, The diameter interference (C-A) between (C) and the inscribed diameter (A),
(Diameter tightening allowance (CA)) / (Ball diameter d)
Is in a range of 0.03 to 0.10,
The counter part of the outer ring is composed of a flat part extending in a cylindrical surface from the groove bottom of the raceway groove and a counter spreading part having an inner diameter larger than the flat part, and the flat part is shorter in the axial direction than the counter spreading part. And
The retainer is a ring-shaped iron plate retainer formed by forming an iron plate, and retains balls in a plurality of circular pockets equally distributed in the circumferential direction. The outer ring and the inner ring are respectively housings. And an angular ball bearing that is tightly fitted to the rotating member . 外輪のカウンタ広がり部の内径（Ｄ）を、保持器のみで保持された状態のボールの配列の外接径（Ｋ）よりも大きくした請求項１に記載のアンギュラ玉軸受。The angular contact ball bearing according to claim 1 , wherein an inner diameter (D) of a counter spreading portion of the outer ring is larger than a circumscribed diameter (K) of an array of balls held only by a cage.
JP07691998A 1998-03-25 1998-03-25 Angular contact ball bearings Expired - Lifetime JP3907820B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP07691998A JP3907820B2 (en) 1998-03-25 1998-03-25 Angular contact ball bearings

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP07691998A JP3907820B2 (en) 1998-03-25 1998-03-25 Angular contact ball bearings

Publications (2)

Publication Number Publication Date
JPH11270563A JPH11270563A (en) 1999-10-05
JP3907820B2 true JP3907820B2 (en) 2007-04-18

Family

ID=13619118

Family Applications (1)

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JP07691998A Expired - Lifetime JP3907820B2 (en) 1998-03-25 1998-03-25 Angular contact ball bearings

Country Status (1)

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JP (1) JP3907820B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4862458B2 (en) * 2006-04-03 2012-01-25 株式会社ジェイテクト Double-row rolling bearing for pinion shaft support and rolling bearing device provided with the same
JP2009192049A (en) * 2008-02-18 2009-08-27 Yaskawa Electric Corp Nonseparable angular contact ball bearing

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