JP2003161318A - Bearing unit - Google Patents
Bearing unitInfo
- Publication number
- JP2003161318A JP2003161318A JP2001350676A JP2001350676A JP2003161318A JP 2003161318 A JP2003161318 A JP 2003161318A JP 2001350676 A JP2001350676 A JP 2001350676A JP 2001350676 A JP2001350676 A JP 2001350676A JP 2003161318 A JP2003161318 A JP 2003161318A
- Authority
- JP
- Japan
- Prior art keywords
- bearing device
- cage
- crown
- bearings
- shaft
- 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
Links
Landscapes
- Support Of The Bearing (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、例えばハードディ
スクドライブ装置（ＨＤＤ:Hard Disk Driveともい
う）、ビデオテープレコーダ（ＶＴＲ:Video Tape Re
corderともいう）等のスピンドルモータ（ＳＰＭともい
う）に用いられる軸受装置の改良に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a hard disk drive (HDD: Hard Disk Drive), a video tape recorder (VTR: Video Tape Re).
The present invention relates to an improvement of a bearing device used for a spindle motor (also referred to as SPM) such as a corder).
【０００２】[0002]
【従来の技術】従来、上記装置等は、図３０に示すよう
に、一対の組み合せ軸受１００，１００により構成さ
れ、組み合せの方向は、特には決められておらず、発塵
のしやすい保持器２００の開口側２０１を向い合せ、軸
受ユニットとしての外部への発塵を低減するように配置
がされるのが一般的である。図中３００は軸（シャフ
ト）、４００は軸受１００，１００間に挿入されている
間座を示す。また、図３１に示すように、軸３００に直
接複列の溝３０１，３０１を設け、２個の外輪１０１，
１０１の間にばね５００を設けた軸付軸受も一般的で、
この場合にあっても冠形保持器２００の組込み方向は図
３０の場合と同様に保持器開口側２０１同士を向かい合
わせて組み込んでいる。図３０、図３１において矢印は
予圧方向を示す。今日では製品の輸送時における耐揺動
性（耐フレッチング性ともいう）の向上を図るべく、軸
受に封入される潤滑剤は、従来の保持器乗せから溝封入
とするのが一般的である。2. Description of the Related Art Conventionally, as shown in FIG. 30, the above-mentioned device or the like is composed of a pair of combined bearings 100, 100, and the direction of the combination has not been determined in particular, so that the cage is likely to generate dust. It is general that the opening side 201 of 200 is opposed to each other, and the bearing unit is arranged so as to reduce dust generation to the outside. In the figure, 300 is a shaft, and 400 is a spacer inserted between the bearings 100. Further, as shown in FIG. 31, the shaft 300 is provided directly with double-row grooves 301, 301, and the two outer rings 101,
A shaft bearing in which a spring 500 is provided between 101 is also common,
Even in this case, the corrugated cage 200 is assembled with the cage opening sides 201 facing each other as in the case of FIG. The arrows in FIGS. 30 and 31 indicate the preload direction. Nowadays, in order to improve rocking resistance (also referred to as fretting resistance) during transportation of products, it is general that the lubricant filled in the bearing is grooved instead of being mounted on a conventional cage.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、この形
態の装置を回転させた場合、溝に潤滑剤が封入されてい
る為、回転トルクやその変動が大きく、また、回転に同
期しない振動（ＮＲＲＯともいう）が大きくなるといっ
た問題がある。図３２は、図３１に示した従来技術の保
持器組込み例を拡大して示す。すなわち、このような従
来技術では、外輪１０１の反接触角側に溜まったグリー
スＧが、玉６００に巻き込まれ玉６００の自転方向に移
動し、そのグリースＧが冠形保持器２００に掻き取ら
れ、掻きとったグリースＧが保持器端面側（ポケット反
開口側）２０２の外径部に溜まり山になり、外輪１０１
側のグリースＧと接触することにより大きな抵抗になる
ため、トルクが大きくなる。また、一旦掻き取ったグリ
ースＧも玉６００に巻き込まれ易く、トルクが不安定で
大きくなる。本発明は、従来技術の有するこのような問
題点に鑑みなされたもので、その目的とするところは、
回転トルクやその変動が小さく、回転精度の高い軸受装
置を提供することである。However, when the apparatus of this form is rotated, the rotation torque and its fluctuation are large because the lubricant is filled in the groove, and the vibration (NRRO) which is not synchronized with the rotation is also generated. There is a problem that it becomes large. FIG. 32 is an enlarged view of an example of incorporating the conventional cage shown in FIG. That is, in such a conventional technique, the grease G collected on the side opposite to the contact angle of the outer ring 101 is caught in the ball 600 and moves in the rotation direction of the ball 600, and the grease G is scraped off by the crown-shaped cage 200. The scraped grease G is accumulated in the outer diameter portion of the cage end surface side (pocket non-opening side) 202 to form a mountain, and the outer ring 101
When the grease G on the side comes into contact with the grease G, a large resistance is generated, so that the torque is increased. Further, the grease G once scraped off is also easily caught in the balls 600, and the torque becomes unstable and becomes large. The present invention has been made in view of such problems of the prior art, and its object is to:
It is an object of the present invention to provide a bearing device having high rotational accuracy with small rotational torque and its fluctuation.
【０００４】[0004]
【課題を解決するための手段】上記課題を達成するため
に本発明がなした技術的手段は、冠形保持器を組み込ん
だ軸受を軸に固定してなる軸受装置において、内輪の保
持器開口側及び外輪の保持器反開口側に予圧が印加され
ていることである。すなわち、接触角が０度に成らない
状態で使用され、内輪と玉との接触点が保持器ポケット
開口側の内輪軌道面に位置し、外輪と玉との接触点が保
持器ポケット反開口側の外輪軌道面に位置する。また、
冠形保持器を組み込んだ二個の軸受を軸に固定してなる
軸受装置において、内輪の保持器開口側及び外輪の保持
器反開口側に予圧が印加されて組み合わせられたことで
ある。上記二個の軸受における各保持器は、夫々のポケ
ット反開口側同士が向き合うように組み込まれている。
また、夫々のポケット開口側同士が向き合うように組み
込まれている。また、両列の外輪間を離間する方向に予
圧した複列の軸受装置において、両軸受の冠形保持器の
ポケット反開口側同士が向き合うように組み込まれてい
ることである。上記両列の外輪間にはばねが配置され
る。二個の軸受を配し、その外輪間にばねを配置する。
また、両列の外輪間を近づく方向に予圧した複列の玉軸
受装置において、両軸受の冠形保持器のポケット開口側
同士が向き合うように組み込まれていることである。ま
た、両列の内輪間を近づく方向に予圧した複列の玉軸受
装置において、両軸受の冠形保持器のポケット反開口側
同士が向き合うように組み込まれていることである。ま
た、両列の内輪間に配置したばねにより、該内輪間を離
間する方向に予圧した複列の軸受装置において、両軸受
における冠形保持器のポケット開口側同士が向き合うよ
うに組み込まれていることである。上記複列の軸受装置
は、軸に複列の溝がある場合、軸に内輪が固定されてい
る場合、若しくは軸に一方の溝があり、他方には内輪が
固定されている場合がある。また、上記複列の軸受装置
は、軸に一方の溝があり、他方には内輪が固定されてい
る場合がある。また、上記複列の軸受装置において、少
なくとも軸あるいはハウジングの一部に玉の軌道溝を設
けたことである。また、上記軸受装置は、外輪回転と内
輪回転のいずれかである。さらに、上述した全ての軸受
装置若しくはそのいずれかの軸受装置において、軸方向
一端面と軸方向他端面との間に、保持器組込み方向を判
別可能とする差異を設けたことである。In order to achieve the above object, the technical means of the present invention is to provide a bearing device in which a bearing having a crown-shaped retainer is fixed to a shaft. That is, a preload is applied to the outer side and the side of the outer ring opposite to the cage. That is, when the contact angle is not 0 degree, the contact point between the inner ring and the ball is located on the raceway surface of the inner ring on the cage pocket opening side, and the contact point between the outer ring and the ball is on the cage pocket non-opening side. Located on the outer ring raceway surface of. Also,
In a bearing device in which two bearings incorporating a crown-shaped cage are fixed to a shaft, preload is applied to the cage opening side of the inner ring and the cage non-opening side of the outer ring to combine them. The cages of the two bearings are incorporated so that the pocket opposite sides of the pockets face each other.
Further, they are incorporated so that the respective pocket opening sides face each other. Further, in a double-row bearing device in which the outer rings of both rows are preloaded in a direction in which the outer races are separated from each other, the crown cages of both bearings are installed such that the pocket opposite sides of the pockets face each other. A spring is arranged between the outer rings of both rows. Two bearings are arranged and a spring is arranged between the outer rings.
Further, in a double-row ball bearing device preloaded in a direction in which the outer races of both rows approach each other, the crown-shaped cages of both bearings are installed so that the pocket opening sides face each other. Further, in a double-row ball bearing device in which the inner races of both rows are preloaded in a direction approaching each other, the crown-like cages of both bearings are installed so that the pocket non-opening sides face each other. Further, in a double-row bearing device in which the inner rings of both rows are preloaded in a direction in which the inner rings are separated from each other, the crown retainers of both bearings are installed so that their pocket opening sides face each other. That is. The double-row bearing device may have a double-row groove on the shaft, an inner ring fixed to the shaft, or one groove on the shaft and an inner ring fixed to the other. In the double-row bearing device, the shaft may have one groove and the other may have the inner ring fixed thereto. Further, in the above double-row bearing device, at least a part of the shaft or the housing is provided with a ball raceway groove. Further, the bearing device is either outer ring rotating or inner ring rotating. Further, in all of the above bearing devices or any one of the bearing devices, a difference is provided between the one end face in the axial direction and the other end face in the axial direction so that the cage mounting direction can be determined.
【０００５】[0005]
【発明の実施の形態】以下、本発明軸受装置の一実施形
態を図に基づいて説明する。なお、本実施形態は、本発
明の一実施形態にすぎず何等これに限定解釈されるもの
ではない。また、各実施形態は、外輪回転と内輪回転の
いずれも対応可能である。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the bearing device of the present invention will be described below with reference to the drawings. It should be noted that the present embodiment is merely one embodiment of the present invention and should not be construed as being limited thereto. Further, each of the embodiments is compatible with both outer ring rotation and inner ring rotation.
【０００６】「第一実施形態」図１は本発明軸受装置の
第一実施形態を示し、該装置は、二個の転がり軸受１，
１を、各軸受１，１の内輪２，２を軸（シャフト）６の
外周に固定して備えると共に、予圧（アキシアル荷重）
が印加されて組み合わされている。また、本実施形態で
は、二個の軸受を対で使用する形態をもって説明する
が、本発明は二個の軸受の組み合わせに限定解釈される
ものではない。転がり軸受１は、外周に内輪軌道２ａを
有する内輪２と、内周に外輪軌道３ａを有する外輪３
と、該内輪軌道２ａと外輪軌道３ａの間に組み込まれる
複数個の転動体４と、該転動体４を等配に保持する冠形
保持器５とから構成されている玉軸受である。冠形保持
器５は、例えば環状の主部５ｃと、該主部５ｃの軸方向
片面に設けられた複数のポケット５ｄとを備え、該ポケ
ット５ｄが主部５ｃの軸方向片面に互いに間隔をあけて
配置された一対の爪（弾性片ともいう）５ｅ同士の間に
設けられている。また、各軸受１の内外輪２，３間には
密封板（本実施形態ではシールドであるが、接触若しく
は非接触のシールも適用可能である。）９が必要に応じ
て備えられている。密封板９の構成については特に限定
解釈されず本発明の範囲内で設計変更可能である。ま
た、製品の輸送時における耐揺動性の向上を図るべく、
軸受１に封入される潤滑剤は溝封入（内輪軌道２ａ、外
輪軌道３ａへの封入）とする。特に本発明は、このよう
に潤滑剤を溝封入とした軸受１，１を組合わせた軸受装
置において、トルク低減・回転精度向上を図るものであ
る。上述の通り、転がり軸受１としては特に限定されず
一般的な構成を採っているが、本実施形態では、二個の
軸受１，１における各保持器５，５のポケット反開口側
５ｂ，５ｂが向かい合うように配設されている点、およ
び保持器ポケット開口側５ａ，５ａに位置する内輪端面
２ｂ，２ｂと保持器ポケット反開口側５ｂ，５ｂに位置
する外輪端面３ｂ，３ｂに予圧（アキシアル荷重）が印
加されている点に特徴的な構成要素がある。従って、内
輪２、外輪３、転動体４、冠形保持器５の構造は特に限
定解釈されず任意であるため詳細な説明は省略する。[First Embodiment] FIG. 1 shows a first embodiment of the bearing device of the present invention, which comprises two rolling bearings 1, 1.
1, the inner ring 2, 2 of each bearing 1, 1 is fixed to the outer circumference of the shaft 6, and preload (axial load)
Are applied and combined. In addition, in the present embodiment, a description will be given with a mode in which two bearings are used in pairs, but the present invention is not limited to the combination of two bearings. The rolling bearing 1 includes an inner ring 2 having an inner ring raceway 2a on the outer circumference and an outer ring 3 having an outer ring raceway 3a on the inner circumference.
And a plurality of rolling elements 4 incorporated between the inner ring raceway 2a and the outer ring raceway 3a, and a crown-shaped cage 5 that holds the rolling elements 4 at equal intervals. The crown-shaped cage 5 includes, for example, an annular main portion 5c and a plurality of pockets 5d provided on one axial surface of the main portion 5c, and the pockets 5d are spaced from each other on one axial surface of the main portion 5c. It is provided between a pair of claws (also referred to as elastic pieces) 5e arranged apart from each other. Further, a sealing plate (a shield in this embodiment, but a contact or non-contact seal is also applicable) 9 is provided between the inner and outer rings 2 and 3 of each bearing 1 as required. The configuration of the sealing plate 9 is not particularly limited and the design can be changed within the scope of the present invention. In addition, in order to improve swing resistance during product transportation,
The lubricant filled in the bearing 1 is groove-filled (filling the inner ring raceway 2a and the outer ring raceway 3a). In particular, the present invention intends to reduce the torque and improve the rotation accuracy in the bearing device in which the bearings 1 and 1 in which the groove is filled with the lubricant is combined. As described above, the rolling bearing 1 is not particularly limited and has a general structure, but in the present embodiment, the pocket opposite opening sides 5b, 5b of the cages 5, 5 of the two bearings 1, 1 are formed. Are arranged so as to face each other, and the inner ring end surfaces 2b, 2b located on the cage pocket opening sides 5a, 5a and the outer ring end surfaces 3b, 3b located on the cage pocket non-opening sides 5b, 5b are preloaded (axially). There is a characteristic component in that the load is applied. Therefore, the structures of the inner ring 2, the outer ring 3, the rolling elements 4, and the crown-shaped cage 5 are not particularly limited to interpretation and are arbitrary, so detailed description thereof will be omitted.
【０００７】本実施形態によれば、軸受１，１の外輪
３，３間には間座７を配し、保持器ポケット開口側５
ａ，５ａから内輪２，２に予圧Ｆａｏを印加すること
で、外輪３，３には保持器ポケット反開口側５ｂ，５ｂ
から予圧が印加される（図１参照）。なお、この予圧を
印加する方法は特に限定解釈されず設計変更可能であ
る。また、予圧量は適宜必要・最適な量を設定し限定は
されない。このように冠形保持器５を組み込んだ軸受に
おいて、保持器ポケット開口側５ａ，５ａに位置する内
輪端面２ｂ，２ｂ及び保持器ポケット反開口側５ｂ，５
ｂに位置する外輪端面３ｂ，３ｂに予圧を印加すること
により、トルクが低く、回転精度の高い軸受装置が設計
可能となる。すなわち、図２に示すように、溝に封入さ
れたグリースＧは反接触角側、特に遠心力により外輪３
側に溜まるが、外輪３の反接触角側に溜まったグリース
Ｇは、玉４の回転に伴い、接触角と平行に保持器爪５ｅ
側に移動（移動方向を図中矢印Ａで示す）し、保持器爪
５ｅ付近で掻き取られる。掻き取られたグリースＧは、
爪５ｅと爪５ｅの間に堆積するため、適度なグリース供
給を可能とする。また、発塵の問題に対しては、磁性流
体シールを用いる等により解決が可能である。According to this embodiment, the spacer 7 is arranged between the outer rings 3 and 3 of the bearings 1 and 1, and the cage pocket opening side 5 is provided.
By applying a preload Fao to the inner rings 2 and 2 from a and 5a, the outer pockets 3 and 3 are opposite to the cage pocket open side 5b and 5b.
A preload is applied from (see FIG. 1). The method of applying this preload is not particularly limited and the design can be changed. Further, the preload amount is appropriately set as necessary / optimal amount and is not limited. In the bearing in which the crown-shaped cage 5 is incorporated as described above, the inner ring end surfaces 2b and 2b located on the cage pocket opening sides 5a and 5a and the cage pocket non-opening sides 5b and 5 are formed.
By applying a preload to the outer ring end faces 3b, 3b located at b, it is possible to design a bearing device with low torque and high rotation accuracy. That is, as shown in FIG. 2, the grease G sealed in the groove is applied to the outer ring 3 by the counter-contact angle side, especially centrifugal force.
The grease G, which collects on the opposite side of the outer ring 3, but collects on the side opposite to the contact angle of the outer ring 3, rotates in parallel with the contact angle as the balls 4 rotate.
It moves to the side (the moving direction is indicated by an arrow A in the figure) and is scraped off near the holder claws 5e. The grease G scraped off is
Since it accumulates between the claws 5e, the grease can be appropriately supplied. Further, the problem of dust generation can be solved by using a magnetic fluid seal or the like.
【０００８】「第二実施形態」図３は、本発明軸受装置
の第二実施形態を示す。本実施形態では、二個の軸受
１，１における各保持器５，５のポケット開口側５ａ，
５ａが向かい合うように配設されている点、および保持
器ポケット開口側５ａ，５ａに位置する内輪端面２ｃ，
２ｃと保持器ポケット反開口側５ｂ，５ｂに位置する外
輪端面３ｃ，３ｃに予圧が印加されている点に、第一実
施形態と相違する特徴的な構成要素がある。従って、内
輪２、外輪３、転動体４、保持器５などのその他の構造
は特に限定解釈されず任意であるため、上述した第一実
施形態を援用して詳細な説明は省略する。[Second Embodiment] FIG. 3 shows a second embodiment of the bearing device of the present invention. In the present embodiment, the pocket opening side 5a of each cage 5, 5 in the two bearings 1, 1
5a are arranged so as to face each other, and the inner ring end surface 2c located on the cage pocket opening side 5a, 5a,
2c and the outer ring end faces 3c, 3c located on the cage pocket non-opening sides 5b, 5b are preloaded, which is a characteristic component different from the first embodiment. Therefore, the other structures such as the inner ring 2, the outer ring 3, the rolling elements 4, and the cage 5 are not particularly limited and are optional, and therefore detailed description will be omitted by referring to the above-described first embodiment.
【０００９】本実施形態によれば、軸受１，１の内輪
２，２間には間座７を配し、保持器ポケット反開口側５
ｂ，５ｂから外輪３，３に予圧Ｆａｏを印加すること
で、内輪２，２には保持器ポケット開口側５ａ，５ａか
ら予圧が印加される（図３参照）。なお、この予圧を印
加する方法は特に限定解釈されず設計変更可能である。
また、予圧量は適宜必要・最適な量を設定し限定はされ
ない。このように冠形保持器５を組み込んだ軸受におい
て、保持器ポケット開口側５ａ，５ａに位置する内輪端
面２ｃ，２ｃ及び保持器ポケット反開口側５ｂ，５ｂに
位置する外輪端面３ｃ，３ｃに予圧を印加することによ
り、トルクが低く、回転精度の高い軸受装置が設計可能
となる。また、発塵の問題に対しては、磁性流体シール
を用いる等により解決が可能である。尚、第一、第二実
施形態では夫々間座７によって軸受１，１を離間してい
るが、内輪２と外輪３の幅を変えることで軸受１，１を
離間しても良い。According to this embodiment, the spacer 7 is arranged between the inner rings 2 and 2 of the bearings 1 and 1, and the cage pocket is opposite to the opening side 5.
By applying a preload Fao to the outer rings 3 and 3 from b and 5b, a preload is applied to the inner rings 2 and 2 from the cage pocket opening sides 5a and 5a (see FIG. 3). The method of applying this preload is not particularly limited and the design can be changed.
Further, the preload amount is appropriately set as necessary / optimal amount and is not limited. In the bearing in which the crown-shaped cage 5 is incorporated in this way, preload is applied to the inner ring end surfaces 2c, 2c located on the cage pocket opening sides 5a, 5a and the outer ring end surfaces 3c, 3c located on the cage pocket non-opening sides 5b, 5b. By applying, it becomes possible to design a bearing device with low torque and high rotation accuracy. Further, the problem of dust generation can be solved by using a magnetic fluid seal or the like. In the first and second embodiments, the bearings 1 and 1 are separated by the spacer 7, but the bearings 1 and 1 may be separated by changing the widths of the inner ring 2 and the outer ring 3.
【００１０】「第三実施形態」第三実施形態を図４に示
す。本実施形態は、内周に複列の軌道溝１０ａ，１０ａ
を周設したハウジング１０と、該ハウジング１０の一方
の軌道溝１０ａに対向する軌道溝６ａを外周の一方に周
設した軸６と、該ハウジング１０の他方の軌道溝１０ａ
に、軌道溝２ａを対向させて軸６の外周に固定される別
体の内輪２と、上記ハウジング１０の軌道溝１０ａと軸
６の軌道溝６ａとの間およびハウジング１０の他方の軌
道溝１０ａと内輪２の軌道溝２ａとの間に夫々冠形保持
器５，５を介して組み込まれた複数個の転動体（玉）４
…，４…とにより構成される。そして本実施形態では、
図における軸６の左側を押さえ、右側の別体内輪２の右
側端面２ｂを押すことにより予圧Ｆａｏを印加する。し
たがって、この予圧形態は、いわゆるＯ型となる。冠形
保持器５，５は、そのポケット反開口側５ｂ，５ｂ同士
が向き合う方向に組み込まれる。このように、両軸受の
冠形保持器５，５のポケット反開口側５ｂ，５ｂ同士が
向かい合うように配置（ポケット５ｄが互いに向き合わ
ない外向きに配置）された状態で、内輪２の端面２ｂに
予圧Ｆａｏを印加しているため、上述した第一実施形
態、第二実施形態と同様に、ハウジング１０の溝１０ａ
の反接触角側に溜まったグリースＧが、玉４に巻き込ま
れ、玉４の自転方向に移動し、そのグリースＧが冠形保
持器５に掻き取られ、掻きとったグリースＧが冠形保持
器５の爪５ｅと爪５ｅとの間に溜まり安定する（図５参
照）。内輪２、転動体４、冠形保持器５など各構成部品
の詳細な構成・作用効果にあっては上述した第一実施形
態と同一であるため省略する。"Third Embodiment" A third embodiment is shown in FIG. In this embodiment, double-row raceway grooves 10a, 10a are provided on the inner circumference.
And a shaft 6 having a raceway groove 6a facing one of the raceway grooves 10a of the housing 10 on one outer circumference, and the other raceway groove 10a of the housing 10.
Between the raceway groove 10a of the housing 10 and the raceway groove 6a of the shaft 6 and the other raceway groove 10a of the housing 10 and the inner ring 2 of a separate body fixed to the outer circumference of the shaft 6 with the raceway groove 2a facing each other. Between the inner race 2 and the raceway groove 2a of the inner ring 2 and a plurality of rolling elements (balls) 4 which are respectively installed via crown-shaped cages 5 and 5.
,, ... And in this embodiment,
A preload Fao is applied by pressing the left side of the shaft 6 in the figure and pushing the right end surface 2b of the right inner ring 2 of the body. Therefore, this preload mode is a so-called O type. The crown-shaped cages 5 and 5 are installed in a direction in which the pocket non-opening sides 5b and 5b face each other. In this way, the end faces 2b of the inner ring 2 are arranged in such a manner that the pocket opposite sides 5b, 5b of the crown-shaped cages 5, 5 of both bearings face each other (the pockets 5d are arranged outward so that they do not face each other). Since the preload Fao is applied to the groove 10a of the housing 10, as in the above-described first and second embodiments.
Grease G collected on the side opposite to the contact angle of the ball 4 is caught in the ball 4 and moves in the rotation direction of the ball 4, and the grease G is scraped off by the crown-shaped cage 5, and the scraped grease G is held in the crown shape. It accumulates between the claws 5e of the container 5 and the claws 5e and becomes stable (see FIG. 5). The detailed configurations and operational effects of the respective components such as the inner ring 2, the rolling elements 4, the crown-shaped cage 5, etc. are the same as those in the above-described first embodiment, and will therefore be omitted.
【００１１】「第四実施形態」第四実施形態を図６に示
す。本実施形態は、上述した第三実施形態において、軸
６が段付きの形態となった例である。その他の構成およ
び予圧の印加方法、そして本実施形態の作用効果は第三
実施形態と同じである。[Fourth Embodiment] FIG. 6 shows a fourth embodiment. This embodiment is an example in which the shaft 6 has a stepped shape in the above-described third embodiment. The other configurations, the preload application method, and the operation and effect of this embodiment are the same as those of the third embodiment.
【００１２】「第五実施形態」第五実施形態を図７に示
す。本実施形態は、内周の一方に軌道溝１０ａを周設し
た段付きのハウジング１０と、該ハウジング１０の一方
の軌道溝１０ａに対向する軌道溝６ａを外周の一方に周
設した段付きの軸６と、上記ハウジング１０の軌道溝１
０ａと軸６の軌道溝６ａとの間に冠形保持器５を介して
組み込まれた転動体（玉）４…と、ハウジング１０の段
部に外輪３を固定すると共に、内輪２を軸６に固定し、
外輪３と内輪２の間に冠形保持器５を介して複数個の転
動体４…を組み込んでなる単体の玉軸受１により構成さ
れる。内輪２、外輪３、転動体４、冠形保持器５など各
構成部品の詳細な構成・予圧の印加方法および本実施形
態の作用効果は第三実施形態と同じである。[Fifth Embodiment] FIG. 7 shows a fifth embodiment. In the present embodiment, a stepped housing 10 having a raceway groove 10a provided on one of the inner circumferences thereof and a stepped housing having a raceway groove 6a facing one of the raceway grooves 10a of the housing 10 provided on one of the outer circumferences thereof are provided. Shaft 6 and raceway groove 1 of the housing 10
0a and the raceway groove 6a of the shaft 6 and the rolling elements (balls) 4 mounted via the crown-shaped cage 5 and the outer ring 3 is fixed to the step portion of the housing 10, and the inner ring 2 is fixed to the shaft 6. Fixed to
It is composed of a single ball bearing 1 in which a plurality of rolling elements 4 ... Are incorporated between an outer ring 3 and an inner ring 2 via a crown-shaped cage 5. The detailed configuration of each component such as the inner ring 2, the outer ring 3, the rolling element 4, the crown-shaped cage 5, the method of applying the preload, and the operation and effect of this embodiment are the same as those of the third embodiment.
【００１３】「第六実施形態」第六実施形態を図８に示
す。本実施形態は、外周に複列の軌道溝６ａ，６ａを形
成した軸６と、該軸６の一方の軌道溝６ａに対向する軌
道溝１０ａを外周の一方に周設したハウジング１０と、
該軸６の他方の軌道溝６ａに対向するハウジング１０の
外周に軌道溝３ａを対向させて固定される別体の外輪３
と、上記ハウジング１０の軌道溝１０ａと軸６の軌道溝
６ａとの間および軸６の他方の軌道溝６ａと外輪３の軌
道溝３ａとの間に夫々冠形保持器５，５を介して組み込
まれた複数個の転動体（玉）４…，４…とにより構成さ
れる。そして本実施形態では、図におけるハウジング１
０の左側を押さえ、右側の別体の外輪３を押すことによ
り予圧Ｆａｏを印加する。したがって、この予圧形態は
いわゆるＸ型予圧となる。冠形保持器５，５は、そのポ
ケット開口側５ａ，５ａ同士が向き合う方向に組み込ま
れる。外輪３、転動体４、冠形保持器５など各構成部品
の詳細な構成・本実施形態の作用効果は第三実施形態と
同じである。"Sixth Embodiment" A sixth embodiment is shown in FIG. In the present embodiment, a shaft 6 having double-row raceway grooves 6a, 6a formed on the outer circumference, and a housing 10 having a raceway groove 10a facing one of the raceway grooves 6a of the shaft 6 provided on one outer circumference,
A separate outer ring 3 fixed to the outer circumference of the housing 10 facing the other raceway groove 6a of the shaft 6 with the raceway groove 3a facing the outer circumference.
Through the cages 5 and 5 between the raceway groove 10a of the housing 10 and the raceway groove 6a of the shaft 6 and between the other raceway groove 6a of the shaft 6 and the raceway groove 3a of the outer ring 3 respectively. It is composed of a plurality of rolling elements (balls) 4 ... And in this embodiment, the housing 1 in the figure
The preload Fao is applied by pressing the left side of 0 and pushing the separate outer ring 3 on the right side. Therefore, this form of preload is a so-called X-type preload. The crown-shaped cages 5 and 5 are installed so that the pocket opening sides 5a and 5a thereof face each other. Detailed structure of each component such as the outer ring 3, the rolling element 4, the crown-shaped cage 5, and the operation and effect of this embodiment are the same as those of the third embodiment.
【００１４】「第七実施形態」第七実施形態を図９に示
す。本実施形態は、第六実施形態において、ハウジング
１０が段付き形態となった例である。その他の構成・予
圧の印加方法および本実施形態の作用効果は第六実施形
態と同じである。"Seventh Embodiment" A seventh embodiment is shown in FIG. This embodiment is an example in which the housing 10 has a stepped configuration in the sixth embodiment. Other configurations, the method of applying a preload, and the operation and effect of this embodiment are the same as those of the sixth embodiment.
【００１５】「第八実施形態」第八実施形態を図１０に
示す。本実施形態は、内周の一方に軌道溝１０ａを周設
した段付きのハウジング１０と、該ハウジング１０の一
方の軌道溝１０ａに対向する軌道溝６ａを外周の一方に
周設した段付きの軸６と、上記ハウジング１０の軌道溝
１０ａと軸６の軌道溝６ａとの間に冠形保持器５を介し
て組み込まれた転動体（玉）４…と、ハウジング１０の
段部に外輪３を固定すると共に、内輪２を軸６に固定
し、外輪３と内輪２の間に冠形保持器５を介して複数個
の転動体４…を組み込んでなる単体の玉軸受１により構
成され、大体の構成は上述した第五実施形態と同じだ
が、本実施形態では、冠形保持器５，５は、そのポケッ
ト開口側５ａ，５ａ同士を向い合わせとなるように配置
すると共に、いわゆるＸ型予圧を印加（予圧方法は第六
実施形態と同じ）している。従って、本実施形態の作用
効果は第六実施形態と同じである。"Eighth Embodiment" An eighth embodiment is shown in FIG. In the present embodiment, a stepped housing 10 having a raceway groove 10a provided on one of the inner circumferences thereof and a stepped housing having a raceway groove 6a facing one of the raceway grooves 10a of the housing 10 provided on one of the outer circumferences thereof are provided. The shaft 6, rolling elements (balls) 4 incorporated between the raceway groove 10a of the housing 10 and the raceway groove 6a of the shaft 6 via the crown-shaped cage 5, and the outer ring 3 on the step portion of the housing 10. And the inner ring 2 is fixed to the shaft 6, and a plurality of rolling elements 4 are incorporated between the outer ring 3 and the inner ring 2 via the crown-shaped cage 5 to form a single ball bearing 1. Although the general structure is the same as that of the fifth embodiment described above, in this embodiment, the crown-shaped cages 5 and 5 are arranged so that their pocket opening sides 5a and 5a face each other, and a so-called X-shaped cage is arranged. A preload is applied (the preload method is the same as in the sixth embodiment). Therefore, the operation and effect of this embodiment are the same as those of the sixth embodiment.
【００１６】「第九実施形態」第九実施形態を図１１に
示す。本実施形態は、内周に複列の軌道溝１０ａ，１０
ａを形成したハウジング１０と、ストレート形状の軸６
と、上記ハウジング１０の軌道溝１０ａ，１０ａに、軌
道溝２ａ，２ａを夫々対向するように、該軸６の外周に
固着された別体の内輪２，２と、そのハウジング１０の
軌道溝１０ａ，１０ａと内輪２，２の軌道溝２ａ，２ａ
との間に、夫々冠形保持器５，５を介して組み込まれる
複数個の転動体４…，４…により構成される。そして本
実施形態では、一方の内輪２を押さえ、他方の内輪２を
押すことにより予圧を印加する。したがって、この予圧
形態はいわゆるＯ型となる。冠形保持器５，５は、その
ポケット反開口側５ｂ，５ｂ同士が向き合う方向に組み
込まれる。内輪２、転動体４、冠形保持器５など各構成
部品の詳細な構成および本実施形態の作用効果は第三実
施形態と同じである。"Ninth Embodiment" A ninth embodiment is shown in FIG. In the present embodiment, double-row raceway grooves 10a, 10 are provided on the inner circumference.
The housing 10 in which a is formed and the straight shaft 6
A separate inner ring 2, 2 fixed to the outer periphery of the shaft 6 so that the raceway grooves 2a, 2a face the raceway grooves 10a, 10a of the housing 10, respectively, and the raceway groove 10a of the housing 10. , 10a and raceway grooves 2a, 2a of inner rings 2, 2
, And a plurality of rolling elements 4 ... Then, in the present embodiment, one inner ring 2 is pressed and the other inner ring 2 is pressed to apply a preload. Therefore, this preload mode is a so-called O type. The crown-shaped cages 5 and 5 are installed in a direction in which the pocket non-opening sides 5b and 5b face each other. The detailed configuration of each component such as the inner ring 2, the rolling element 4, the crown-shaped cage 5, and the operation and effect of this embodiment are the same as those of the third embodiment.
【００１７】「第十実施形態」第十実施形態を図１２に
示す。本実施形態は、外周に複列の軌道溝６ａ，６ａを
形成した軸６と、ストレート形状のハウジング１０と、
上記軸６の軌道溝６ａ，６ａに、軌道溝３ａ，３ａを夫
々対向するように、該ハウジング１０の外周に固着され
た別体の外輪３，３と、その軸６の軌道溝６ａ，６ａと
外輪３，３の軌道溝３ａ，３ａとの間に、夫々冠形保持
器５，５を介して組み込まれる複数個の転動体４…，４
…により構成される。そして本実施形態では、一方の外
輪３を押さえ、他方の外輪３を押すことにより予圧を印
加する。したがって、この予圧形態はいわゆるＸ型とな
る。冠形保持器５，５は、そのポケット開口側５ａ，５
ａ同士が向き合う方向に組み込まれる。外輪３、転動体
４、冠形保持器５など各構成部品の詳細な構成・本実施
形態の作用効果は第六実施形態と同じである。[Tenth Embodiment] FIG. 12 shows a tenth embodiment. In this embodiment, a shaft 6 having double-row raceway grooves 6a, 6a formed on the outer circumference, a straight housing 10,
Separate outer rings 3 and 3 fixed to the outer periphery of the housing 10 so that the raceway grooves 3a and 3a face the raceway grooves 6a and 6a of the shaft 6, respectively, and the raceway grooves 6a and 6a of the shaft 6. Between the outer races 3 and 3 and the raceway grooves 3a and 3a of the outer races 3 and 3, respectively, via the cages 5 and 5, respectively.
It consists of ... Then, in the present embodiment, one outer ring 3 is pressed and the other outer ring 3 is pressed to apply a preload. Therefore, this preload mode is the so-called X type. The crown-shaped cages 5 and 5 have the pocket opening sides 5a and 5
It is incorporated in a direction in which a faces each other. Detailed structure of each component such as the outer ring 3, the rolling element 4, the crown-shaped cage 5, and the operation and effect of this embodiment are the same as those of the sixth embodiment.
【００１８】なお、図４〜図１２に示した実施形態の予
圧印加方法について説明を追記する。軸６と内輪２、外
輪３とハウジング１０別体の部分は、軸６と内輪２の内
径、或いはハウジング１０と外輪３の外径の間におい
て、以下の二方法を適用することが可能である。
隙間をもたせて、デットウェイトを乗せ、所定の予圧
を印加した状態で接着固定する。
しめしろをもたせて、圧入により、トルクまたは共振
周波数による剛性のコントロールを行い所定の予圧を印
加する。The description of the preload application method of the embodiment shown in FIGS. 4 to 12 will be added. For the separate parts of the shaft 6 and the inner ring 2, and the outer ring 3 and the housing 10, the following two methods can be applied between the inner diameter of the shaft 6 and the inner ring 2 or between the outer diameter of the housing 10 and the outer ring 3. . A dead weight is placed over the gap, and a predetermined preload is applied and fixed by adhesion. By providing a interference and press fitting, rigidity is controlled by torque or resonance frequency, and a predetermined preload is applied.
【００１９】「第十一実施形態」第十一実施形態を図１
３に示す。本実施形態は、直接複列の軌道溝６ａ，６ａ
を外周に設けた軸６と、二個の外輪３，３と、該軌道溝
６ａ，６ａと外輪軌道溝３ａ，３ａとの間に、冠形保持
器５，５を介して組み込まれる複数個の転動体４…，４
…と、外輪３，３の間に設けたばね１２とで構成され
る。本実施形態では、外輪３，３同士が離れる方向にば
ね１２で予圧されており（いわゆるＯ型予圧を形成して
いる）、保持器５，５のポケット反開口側５ｂ，５ｂ同
士が向き合う方向に組み込まれる。図中、９は密封板、
１３はばね座を示す。このように、両軸受の冠形保持器
５，５のポケット反開口側５ｂ，５ｂ同士が向かい合う
ように配置（ポケット５ｄ，５ｄが互いに向き合わない
外向きに配置）された状態で、外輪端面３ｂ，３ｂに予
圧（Ｏ型予圧）を印加しているため、図１４（ａ），
（ｂ）に示すように外輪３の反接触角側に溜まったグリ
ースＧが、玉４に巻き込まれ玉４の自転方向に移動し、
そのグリースＧが保持器５に掻き取られ掻きとったグリ
ースＧが保持器５の爪５ｅと爪５ｅとの間に溜まり安定
する。なお、図１５には、本実施形態の軸付軸受におけ
る組立方法の一例を示している。先に組込む側の軸受
は、保持器５をどちら向きでも容易に組み込める。残り
の軸受を組立てるには、ばね押え１４を介してばね１２
を押さえておいて、ばね座１３と組立てる外輪３との間
に先に保持器５を挿入しておく。図中、１５は保持器受
け、１６は三日月状玉受けを示す。その後、偏心させた
外輪溝３ａと軸溝６ａとの間に玉４を挿入し、外輪３を
同心に合せてから玉４を等配に配置し、玉位置に保持器
ポケット５ｄ位置を合せて保持器５を押込むことにより
組立てる。その後、ばね押え１４を外し、該ばね押え１
４により押さえておいたばね１２を伸ばして外輪に押し
当てることにより予圧する。[Eleventh Embodiment] FIG. 1 shows an eleventh embodiment.
3 shows. In this embodiment, the double-row raceway grooves 6a, 6a are directly arranged.
A shaft 6 provided on the outer circumference, two outer rings 3 and 3, and a plurality of outer ring raceways 6a and 6a and outer ring raceway grooves 3a and 3a, which are installed via crown cages 5 and 5. Rolling element 4 ..., 4
, And a spring 12 provided between the outer rings 3 and 3. In the present embodiment, the outer rings 3, 3 are preloaded by the spring 12 in a direction in which they are separated from each other (forming a so-called O-type preload), and the pocket non-opening sides 5b, 5b of the cages 5, 5 face each other. Incorporated into. In the figure, 9 is a sealing plate,
Reference numeral 13 indicates a spring seat. In this manner, the outer ring end surface 3b is arranged in a state in which the pocket opposite sides 5b, 5b of the crown type cages 5, 5 of both bearings are arranged to face each other (the pockets 5d, 5d are arranged outward so that they do not face each other). , 3b, since a preload (O type preload) is applied to FIG.
As shown in (b), the grease G accumulated on the anti-contact angle side of the outer ring 3 is caught in the ball 4 and moves in the rotation direction of the ball 4,
The grease G is scraped off by the retainer 5, and the scraped grease G is accumulated between the claws 5e of the retainer 5 and is stable. It should be noted that FIG. 15 shows an example of an assembling method for the shaft bearing of the present embodiment. The bearing on the side to be installed first can easily install the retainer 5 in either direction. To assemble the remaining bearings, the spring 12 is attached via the spring retainer 14.
While holding down, the retainer 5 is previously inserted between the spring seat 13 and the outer ring 3 to be assembled. In the figure, 15 is a cage receiver, and 16 is a crescent-shaped ball receiver. After that, insert the ball 4 between the eccentric outer ring groove 3a and the shaft groove 6a, align the outer ring 3 concentrically, and then arrange the balls 4 equidistantly, and align the cage pocket 5d position with the ball position. Assemble by pushing the cage 5. After that, the spring retainer 14 is removed, and the spring retainer 1
The spring 12 held by 4 is stretched and pressed against the outer ring to preload.
【００２０】「第十二実施形態」第十二実施形態を図１
６に示す。本実施形態では、軸６に二個の玉軸受１，１
を挿入し、圧入あるいは装置により固定し、外輪３，３
同士を離れる方向にその間に組込んだばね１２により予
圧している。いわゆるＯ型予圧にしており、両軸受の冠
形保持器５，５のポケット反開口側５ｂ，５ｂ同士が向
かい合うように配置（ポケット５ｄ，５ｄが互いに向き
合わない外向きに配置）されているため、第十一実施形
態と同様の作用効果を有する。また、本実施形態では、
密封板９がばね座を兼用し、低コスト、小型化を図って
いるが、別途ばね座を配置するものとすることも可能で
ある。なお、軸受１は、内輪２、外輪３、転動体４、冠
形保持器５、密封板９からる玉軸受で、特に限定されな
い。[Twelfth Embodiment] FIG. 1 shows a twelfth embodiment.
6 shows. In this embodiment, two ball bearings 1, 1 are mounted on the shaft 6.
The outer ring 3,3
The springs 12 are preloaded in the direction in which they are separated from each other. The so-called O-type preload is used, and it is arranged so that the pocket non-opening sides 5b, 5b of the crown-shaped cages 5, 5 of both bearings face each other (the pockets 5d, 5d are arranged outward so that they do not face each other). The same effect as that of the eleventh embodiment is obtained. Further, in this embodiment,
Although the sealing plate 9 also serves as a spring seat to achieve low cost and downsizing, it is possible to dispose a separate spring seat. The bearing 1 is a ball bearing composed of the inner ring 2, the outer ring 3, the rolling elements 4, the crown-shaped cage 5, and the sealing plate 9, and is not particularly limited.
【００２１】「第十三実施形態」第十三実施形態を図１
７に示す。本実施形態は、第十二実施形態と異なり、大
きさの異なる二個の軸受１，１が、軸６に圧入あるいは
接着により固定されており、外輪３，３同士が離れる方
向にばね座１３を介してばね１２により予圧されてい
る。その他の構成および作用効果は第十二実施形態と同
様である。[Thirteenth Embodiment] FIG. 1 shows a thirteenth embodiment.
7 shows. In the present embodiment, unlike the twelfth embodiment, two bearings 1 and 1 having different sizes are fixed to the shaft 6 by press fitting or adhesion, and the spring seat 13 is arranged in a direction in which the outer rings 3 and 3 are separated from each other. Is prestressed by the spring 12 via. Other configurations and operational effects are similar to those of the twelfth embodiment.
【００２２】「第十四実施形態」第十四実施形態を図１
８に示す。本実施形態では第十三実施形態と異なり、密
封板９がばね座を兼用している。この場合は別にばね座
を必要としないため、低コスト化が図れる。その他の構
成・作用効果は第十三実施形態と同様である。[Fourteenth Embodiment] FIG. 1 shows a fourteenth embodiment.
8 shows. In the present embodiment, unlike the thirteenth embodiment, the sealing plate 9 also serves as a spring seat. In this case, since a separate spring seat is not required, the cost can be reduced. Other configurations / effects are similar to those of the thirteenth embodiment.
【００２３】「第十五実施形態」第十五実施形態を図１
９に示す。本実施形態は、複列の軌道溝６ａ，６ａが外
周に形成された軸６と、段付きのハウジング１０と、ハ
ウジング１０の内周に固着された別体の外輪３，３と、
該外輪３，３の軌道溝３ａ，３ａと軸６の軌道溝６ａ，
６ａとの間に冠形保持器５，５を介して組み込まれる複
数個の転動体４…，４…により構成され、軽圧入した外
輪３，３同士が近づく方向にＸ型予圧を与えながら、外
輪３，３をハウジング１０に接着固定している。両列の
冠形保持器５，５は、そのポケット開口側５ａ，５ａ同
士が向き合う内向きに配置されている。このように、両
軸受の冠形保持器５，５のポケット開口側５ａ，５ａ同
士が向かい合うように配置された状態で、外輪３，３同
士が近づく方向にＸ型予圧を印加しているため、外輪３
の反接触角側に溜まったグリースが、玉に巻き込まれ玉
の自転方向に移動し、そのグリースが冠形保持器５に掻
き取られ、掻きとったグリースが保持器５の爪５ｅと爪
５ｅとの間に溜まり安定する。"Fifteenth Embodiment" FIG. 1 shows a fifteenth embodiment.
9 shows. In this embodiment, a shaft 6 having double-row raceway grooves 6a, 6a formed on the outer circumference, a stepped housing 10, and separate outer rings 3, 3 fixed to the inner circumference of the housing 10,
Raceway grooves 3a, 3a of the outer rings 3, 3 and a raceway groove 6a of the shaft 6,
6a is formed by a plurality of rolling elements 4 ..., 4 ... Incorporated via crown-shaped cages 5, 5 while applying an X-type preload in a direction in which the lightly press-fitted outer rings 3, 3 come close to each other. The outer rings 3 and 3 are fixed to the housing 10 by adhesion. The crown-shaped cages 5 and 5 in both rows are arranged inward so that the pocket opening sides 5a and 5a thereof face each other. In this way, the X-type preload is applied in the direction in which the outer rings 3, 3 approach each other in a state in which the pocket opening sides 5a, 5a of the crown type cages 5, 5 of both bearings are arranged to face each other. , Outer ring 3
The grease accumulated on the side opposite to the contact angle of the ball is caught in the ball and moves in the rotation direction of the ball, and the grease is scraped off by the crown-shaped cage 5, and the scraped grease is claw 5e and claw 5e of the cage 5. It collects between and stabilizes.
【００２４】「第十六実施形態」第十六実施形態を図２
０に示す。本実施形態は、段付きのハウジング１０と、
軌道溝６ａが外周の一方に形成された軸６と、該軌道溝
６ａと対向してハウジングの一方の内周に固着された別
体の外輪３と、該外輪３の軌道溝３ａと軸６の軌道溝６
ａとの間に冠形保持器５を介して組み込まれる複数個の
転動体４…と、内輪２・外輪３・転動体４・冠形保持器
５・密封板９とからなる玉軸受１により構成され、外輪
３，３同士が近づく方向にＸ型予圧を与えながら、外輪
３，３をハウジング１０に接着固定している。内輪２は
圧入若しくは接着固定する。両列の冠形保持器５，５
は、そのポケット開口側５ａ，５ａ同士が向き合う内向
きに配置されている。本実施形態では、別体の外輪３と
軸６の外周との間にわたって密封板（シールド）９が両
側に配設されている。本実施形態の作用効果は、第十五
実施形態と同じである。[Sixteenth Embodiment] FIG. 2 shows a sixteenth embodiment.
It shows in 0. In the present embodiment, a stepped housing 10 is provided,
A shaft 6 having a raceway groove 6a formed on one of the outer circumferences thereof, a separate outer ring 3 facing the raceway groove 6a and fixed to one inner circumference of the housing, a raceway groove 3a of the outer ring 3 and the shaft 6 Track groove 6
By a ball bearing 1 including a plurality of rolling elements 4 incorporated with a through a crown type cage 5, and an inner ring 2, an outer ring 3, rolling elements 4, a crown type cage 5, and a sealing plate 9. The outer rings 3 and 3 are bonded and fixed to the housing 10 while applying an X-type preload in a direction in which the outer rings 3 and 3 approach each other. The inner ring 2 is press-fitted or adhesively fixed. Both rows of crown-shaped cages 5, 5
Are arranged inward so that the pocket opening sides 5a, 5a face each other. In this embodiment, sealing plates (shields) 9 are provided on both sides between the outer ring 3 and the outer circumference of the shaft 6 which are separate bodies. The operation and effect of this embodiment are the same as those of the fifteenth embodiment.
【００２５】「第十七実施形態」第十七実施形態を図２
１に示す。本実施形態は、軌道溝６ａが外周の一方に形
成された軸６と、該一方の軌道溝６ａと対向して配した
外輪３と、該軌道溝６ａと外輪３の軌道溝３ａとの間
に、冠形保持器５を介して組み込まれる複数個の転動体
４…と、内輪２と外輪３と、該外輪３と内輪２との間に
冠形保持器５を介して組み込まれる複数個の転動体４…
とからなり、内輪２を軸６に固定して備えられる玉軸受
１と、外輪３，３の間に設けたばね１２とで構成され、
該ばね１２により外輪３，３間を離間する方向に予圧が
印加される。内輪２は圧入若しくは接着固定する。冠形
保持器５，５は、そのポケット反開口側５ｂ，５ｂが対
向する向きに配置される。本実施形態のその他の構成お
よび作用効果は第十一実施形態と同じである。[Seventeenth Embodiment] FIG. 2 shows the seventeenth embodiment.
Shown in 1. In the present embodiment, between the shaft 6 in which the raceway groove 6a is formed on one of the outer circumferences, the outer ring 3 arranged to face the one raceway groove 6a, and the raceway groove 6a and the raceway groove 3a of the outer ring 3. , A plurality of rolling elements 4 ... Incorporated via a crown type cage 5, an inner ring 2 and an outer ring 3, and a plurality of rolling elements 4 incorporated between the outer ring 3 and the inner ring 2 via a crown type cage 5. Rolling element 4 ...
And a ball bearing 1 provided by fixing the inner ring 2 to the shaft 6 and a spring 12 provided between the outer rings 3 and 3,
The spring 12 applies a preload in a direction in which the outer rings 3 and 3 are separated from each other. The inner ring 2 is press-fitted or adhesively fixed. The crown-shaped cages 5 and 5 are arranged so that the pocket-unopened sides 5b and 5b face each other. Other configurations and operational effects of this embodiment are the same as those of the eleventh embodiment.
【００２６】「第十八実施形態」第十八実施形態を図２
２に示す。本実施形態は、軸６とハウジング１０と二個
の内輪２，２、外輪３，３と内輪軌道溝２ａ，２ａと外
輪軌道溝３ａ，３ａとの間に冠形保持器５を介してなる
複数個の転動体４…，４…と、内輪２，２の間に設けら
れたばね１２により構成される。本実施形態では、内輪
２，２同士が離れる方向にばね１２により予圧されてお
り（いわゆるＸ型予圧を形成している）、保持器５，５
のポケット開口側５ａ，５ａ同士が向き合う方向に組み
込まれている。その他作用効果は、第二実施形態と同じ
である。[Eighteenth Embodiment] FIG. 2 shows the eighteenth embodiment.
2 shows. In this embodiment, the shaft-shaped housing 6, the housing 10, the two inner rings 2 and 2, the outer rings 3 and 3, the inner ring raceway grooves 2a and 2a, and the outer ring raceway grooves 3a and 3a are provided with a crown-shaped cage 5 interposed therebetween. 4 and a spring 12 provided between the inner races 2, 2. In this embodiment, the inner rings 2 and 2 are preloaded by the spring 12 in the direction in which they are separated from each other (forming a so-called X-type preload), and the cages 5 and 5 are provided.
The pocket opening sides 5a, 5a are assembled in a direction in which they face each other. Other functions and effects are the same as those of the second embodiment.
【００２７】「第十九実施形態」第十九実施形態を図２
３に示す。本実施形態は、内周に複列の軌道溝１０ａ，
１０ａを周設したハウジング１０と、該ハウジング１０
の一方の軌道溝１０ａに対向する軌道溝６ａを外周の一
方に周設させ、更に段部６ｂを設けた軸６と、該ハウジ
ング１０の他方の軌道溝１０ａに、軌道溝２ａを対向さ
せて軸６の外周に固定される別体の内輪２と、上記ハウ
ジング１０の軌道溝１０ａと軸６の軌道溝６ａとの間お
よびハウジング１０の他方の軌道溝１０ａと内輪２の軌
道溝２ａとの間に夫々冠形保持器５，５を介して組み込
まれた複数個の転動体（玉）４…，４…と、別体の内輪
２と軸の段部６ｂとの間に設けられたばね１２により構
成される。本実施形態では、別体内輪２と軸６の段部６
ｂが離れる方向にばね１２により予圧されており（いわ
ゆるＸ型予圧を形成している）、保持器５，５のポケッ
ト開口側５ａ，５ａ同士が向き合う方向に組み込まれて
いる。その他作用効果は、第二実施形態と同じである。“Nineteenth Embodiment” FIG. 2 shows a nineteenth embodiment.
3 shows. In the present embodiment, double-row raceway grooves 10a,
A housing 10 around 10a, and the housing 10
A raceway groove 6a facing one of the raceway grooves 10a is provided around one of the outer circumferences, and the raceway groove 2a is made to face the shaft 6 having a step 6b and the other raceway groove 10a of the housing 10. Between the inner ring 2 which is a separate body fixed to the outer periphery of the shaft 6, between the raceway groove 10a of the housing 10 and the raceway groove 6a of the shaft 6, and between the other raceway groove 10a of the housing 10 and the raceway groove 2a of the inner ring 2. A plurality of rolling elements (balls) 4 ..., 4 ... Incorporated via coronal cages 5 and 5, respectively, and a spring 12 provided between a separate inner ring 2 and step portion 6b of the shaft. It is composed of In this embodiment, the step 6 of the separate inner race 2 and the shaft 6
It is preloaded by the spring 12 in the direction in which b is separated (forms a so-called X type preload), and is incorporated in a direction in which the pocket opening sides 5a, 5a of the cages 5, 5 face each other. Other functions and effects are the same as those of the second embodiment.
【００２８】「第二十実施形態」保持器開口側５ａの内
輪２若しくは保持器反開口側５ｂの外輪３から予圧Ｆａ
ｏを印加させるためには、軸受１を軸６に組み付ける際
に冠形保持器５の組込み方向が判っていなければならな
い。特に、密封板９を配設してなるものにあっては、冠
形保持器５の組込み方向が外観から判別し難い。そこ
で、図２４に示すように、軸方向（図２４（ａ）の左右
方向）の一端面１ａと他端面１ｂとの間に、上記保持器
５の組込み方向を外観から容易に判別可能とする形態
（差異）を設けるのが好ましい。この様に両端面１ａ，
１ｂ同士の間に差異を設けるには、例えば次の構成が代
表例として挙げられる。このような保持器組込み方向判
別形態は、上述した第一実施形態乃至第十九実施形態の
各実施形態の全て若しくは任意の実施形態に適宜選択可
能である。以下、この保持器組込み方向判別構成および
その作用効果について説明する。[Twentieth Embodiment] The preload Fa is applied from the inner ring 2 on the cage opening side 5a or the outer ring 3 on the cage non-opening side 5b.
In order to apply o, it is necessary to know the installation direction of the crown-shaped cage 5 when the bearing 1 is assembled to the shaft 6. Particularly, in the case where the sealing plate 9 is provided, it is difficult to determine the mounting direction of the crown-shaped cage 5 from the appearance. Therefore, as shown in FIG. 24, the mounting direction of the cage 5 can be easily discriminated from the appearance between the one end surface 1a and the other end surface 1b in the axial direction (the left-right direction in FIG. 24A). It is preferable to provide a form (difference). In this way, both end faces 1a,
In order to provide a difference between 1b, the following configuration can be given as a typical example. Such a retainer incorporation direction determination mode can be appropriately selected for all or any of the first to nineteenth embodiments described above. Hereinafter, the configuration for discriminating the direction in which the cage is incorporated and its function and effect will be described.
【００２９】例えば、図２４（ｂ）に示す様に、内輪２
と外輪３の一方又は双方の片端面２ｂ，３ｂにのみ、保
持器組込み方向を示すマーク１１，１１を付する事が考
えられる。このマーク１１，１１は、例えば図２４
（ｂ）に示すように保持器開口側５ａの軸受内輪端面２
ｂと外輪端面３ｂに付する。このように保持器開口側５
ａの軸受内輪端面２ｂと外輪端面３ｂにマーク１１，１
１を付することで、該マーク１１，１１の付されている
端面が保持器開口側５ａを示すこととなり、簡単かつ瞬
時に保持器組込み方向が判別できる。なお、このマーク
１１は、図示例とは逆に、保持器５の反開口側５ｂの軸
受内輪端面２ｃと外輪端面３ｃに付することもでき、こ
のようにすることで、保持器５の組込み開始位置側を示
すこととなり、必然的にマークのない端面側が開口側５
ａであることが確認できる。マーク１１の一例として、
図２４では×印としたが、これは単なる例示にすぎず限
定されるものではなく、任意に選択可能である。マーク
１１は、別途形成したものを貼設したり、端面に直接刻
設してもよく、また平面状・突状に設けるものとしても
よく、さらにその数量・位置も任意である。また、マー
ク１１は、いずれか一方の端面２ｂ（３ｂ）にのみ設け
るものとすることも出来る。さらに、このマーク１１
は、保持器ポケット開口側５ａ若しくは反開口側５ｂの
いずれかに対向する密封板９に付すものとしてもよく、
上述した構成と同様に保持器の組込み方向が瞬時に判別
可能である。For example, as shown in FIG. 24 (b), the inner ring 2
It is conceivable that marks 11 and 11 indicating the direction in which the cage is installed are provided only on one end surface 2b or 3b of one or both of the outer ring 3 and the outer ring 3. The marks 11 and 11 are shown in FIG.
As shown in (b), the bearing inner ring end surface 2 on the cage opening side 5a
b and the outer ring end face 3b. In this way, the cage opening side 5
The marks 11, 1 are formed on the bearing inner ring end face 2b and the outer ring end face 3b of a.
By adding 1, the end surface with the marks 11, 11 indicates the cage opening side 5a, and the cage mounting direction can be easily and instantly determined. Contrary to the illustrated example, the mark 11 can be attached to the bearing inner ring end surface 2c and the outer ring end surface 3c on the side opposite to the opening 5b of the retainer 5, and by doing so, the retainer 5 can be installed. It means the start position side, and the end face side without a mark is necessarily the opening side 5
It can be confirmed that it is a. As an example of the mark 11,
In FIG. 24, the mark X is shown, but this is merely an example and is not limited and can be arbitrarily selected. The mark 11 may be a separately formed one, may be directly engraved on the end face, may be provided in a planar shape or a protruding shape, and the number and position thereof are arbitrary. Further, the mark 11 may be provided only on one of the end faces 2b (3b). Furthermore, this mark 11
May be attached to the sealing plate 9 facing either the cage pocket opening side 5a or the counter opening side 5b,
As with the above-described configuration, the direction in which the cage is installed can be instantly determined.
【００３０】また、密封板９，９の色彩や材質等を変え
ることにより、軸受一端側と他端側の密封板９，９の構
成を変える事によっても、冠形保持器５の組込み方向を
外観で判別自在とすることもできる。例えば、双方の密
封板９，９の色や模様を変えたり、また、一方の密封板
９を合成樹脂やゴム製とし、他方の密封板９を鋼材とす
ることでも判別可能である。また、合成樹脂製とする場
合、透明の材質を用いれば密封板を透かして冠形保持器
５の組込み方向が確認できる。例えば、上述した第十七
実施形態（図２１）で図示したように、密封板の形状・
大きさなどを変えることによって判別可能とすることも
出来る。また、例えば図１６，１７，１８に示すような
軸６に玉軸受１を組み込む場合には、上述のように密封
板９を軸受１の両端に装着するのではなく、密封板９を
軸受端面のいずれか一方にのみ装着するものとすれば、
冠形保持器５の組込み方向を外観から判別可能とするこ
ともできる。すなわち、冠形保持器５の反開口側５ｂに
位置する軸受端面若しくは保持器５の開口側５ａに位置
する軸受端面にのみ密封板９を装着するものとすれば、
密封板９装着側が保持器開口側５ａ（若しくは保持器反
開口側５ｂ）となり、冠形保持器５の組込み方向が容易
に判別可能となる。更に、上記内輪２と外輪３の一方又
は双方の軸方向端縁部に切り欠き等の凹凸を形成して差
異を設ける事としても保持器組込み方向の判別が可能で
ある。これによれば、ＨＤＤを組み立てる為の自動機
が、上記切り欠き等の凹凸により保持器５の組込み方向
を判別しつつ、所定方向に組み付ける様に構成する事も
できる。Further, by changing the colors and materials of the sealing plates 9 and 9 to change the configurations of the sealing plates 9 and 9 on the one end side and the other end side of the bearing, the direction in which the crown-shaped cage 5 is assembled can be changed. It can also be made visually distinct. For example, the colors and patterns of both sealing plates 9 and 9 may be changed, or one sealing plate 9 may be made of synthetic resin or rubber and the other sealing plate 9 may be made of steel. In the case of synthetic resin, if a transparent material is used, the direction in which the crown-shaped cage 5 is assembled can be confirmed through the sealing plate. For example, as illustrated in the seventeenth embodiment (FIG. 21) described above, the shape of the sealing plate
It is also possible to make it possible to distinguish by changing the size. In addition, for example, when the ball bearing 1 is incorporated in the shaft 6 as shown in FIGS. 16, 17, and 18, the sealing plates 9 are not attached to both ends of the bearing 1 as described above, but the sealing plates 9 are attached to the bearing end surface. If you attach it to only one of the
The direction in which the crown-shaped cage 5 is installed can be discriminated from the appearance. That is, if the sealing plate 9 is attached only to the bearing end surface located on the opposite opening side 5b of the crown-shaped cage 5 or the bearing end surface located on the opening side 5a of the cage 5,
The side on which the sealing plate 9 is mounted becomes the cage opening side 5a (or the cage non-opening side 5b), and the mounting direction of the crown type cage 5 can be easily discriminated. Furthermore, it is possible to determine the direction in which the cage is installed by forming recesses and protrusions such as notches on the axial end edges of one or both of the inner ring 2 and the outer ring 3 to provide a difference. According to this, the automatic machine for assembling the HDD can be configured so as to be assembled in the predetermined direction while determining the assembly direction of the retainer 5 by the unevenness such as the notch.
【００３１】シール付転がり軸受の製造過程で、保持器
組込み方向に応じて上記両端面同士の間に差異を設ける
事は、特に面倒な作業を行なう事なく、容易且つ確実に
行なえる。上述の様に構成されるシール付玉軸受の場合
には、保持器組込み方向が外観から簡易かつ確実に判別
可能であるため、保持器組込み方向に応じてそれぞれの
軸受の組み付け方向の規制を確実に行なえる。上述の転
がり軸受１構成を採用すれば、軸受１の密封板９や軌道
輪（内輪２・外輪３）に冠形保持器５の組込み方向が外
観から判別できるように、判別のための種々の差異を設
けたため、例えば両端１ａ，１ｂに密封板９，９を装着
した軸受であっても、容易に外観から冠形保持器５の方
向性を知ることができる。従って、簡単かつ確実に保持
器開口側５ａの内輪２に予圧Ｆａｏを印加させることが
できるため、回転トルクやその変動、回転に同期しない
振動を低減させることが可能となる。In the process of manufacturing the rolling bearing with a seal, it is possible to easily and surely make a difference between the both end faces depending on the direction in which the cage is assembled, without particularly troublesome work. In the case of the sealed ball bearings configured as described above, the cage mounting direction can be easily and surely determined from the external appearance, so it is possible to ensure that the bearing mounting direction is regulated according to the cage mounting direction. Can be done. If the rolling bearing 1 configuration described above is adopted, it is possible to determine from various aspects the direction in which the crown cage 5 is installed in the sealing plate 9 and the bearing rings (inner ring 2 and outer ring 3) of the bearing 1 from the appearance. Because of the difference, even if the bearings have the sealing plates 9 mounted on both ends 1a and 1b, the directionality of the crown-shaped cage 5 can be easily known from the appearance. Therefore, since the preload Fao can be applied to the inner ring 2 on the cage opening side 5a simply and reliably, it becomes possible to reduce the rotational torque, its fluctuation, and the vibration not synchronized with the rotation.
【００３２】[0032]
【実施例】ここで、上述した実施形態に示す軸受装置の
効果を確認するために行った実験について説明する。ま
ず、軸受内部のグリース挙動を観察した。観察試験装置
の概略図を図２５に示す。本実施例では、グリース挙動
が確認できるように軸受外輪３の反負荷側部分３′と密
封板（シール）９部分は、透明アクリル製とした。観察
にはストロボ装置Ｓ又は高速度ビデオＶを使用し、内輪
２を回転させて撮影した。グリースは染料で着色し、保
持器５のポケット反開口側５ｂの空間に封入した。図２
５（ａ）は、保持器反開口側５ｂの内輪端面及び保持器
開口側５ａの外輪端面に予圧Ｆａｏが印加されている場
合（従来技術の場合ともいう）、（ｂ）は、保持器開
口側５ａの内輪端面及び保持器反開口側５ｂの外輪端面
に予圧Ｆａｏが印加されている場合（本発明の場合と
もいう）とする。
「従来技術の場合」外輪３の軌道面３ａ上に存在する
グリースは、玉４が通過することによって軌道面３ａ外
に排除され、その殆どが保持器５のポケット反開口側５
ｂ（外輪反負荷側方向）へ流動し、ポケット反開口側５
ｂ端面とシール９内面との間からラジアル方向へ流動す
るグリースと交流する。一方、保持器ポケット開口側５
ａの空間に溜まるわずかなグリースは、玉４と接触する
場合のみ玉４を介して流動し、その他のグリースはほと
んど流動しない。
「本発明の場合」外輪３の軌道面３ａ上に存在するグ
リースは、玉４が通過することによって軌道面３ａ外に
排除され、その殆どが保持器５のポケット開口側５ａ方
向（外輪反負荷側方向）へ流動し、保持器ポケット開口
側５ａの空間に溜まる。前記グリースは、玉４と接触す
る場合のみ玉４を介して流動し、その他のグリースはほ
とんど流動しない。一方、保持器ポケット反開口側５ｂ
に流動するわずかなグリースは、ポケット反開口側５ｂ
端面とシール９内面との間からラジアル方向外方へ流動
するグリースと交流する。以上のことから、の場合、
の場合のどちらの場合においても、外輪軌道面３ａ上
に存在するグリース（玉４、内輪２、保持器５に接触
し、遠心力を受けるグリースは、半径方向外方に飛ばさ
れ、外輪側へ供給され易くなる）は、玉４が軌道面３ａ
上を通過することによって、そのほとんどが外輪反負荷
側方向へ流動することが分かった。従って、の場合、
グリースは保持器５と接触し易い傾向となり、グリース
流動は活発になる。一方、の場合、グリースは保持器
ポケット開口側５ａの空間に溜まり易い傾向となるた
め、の場合と比較すると、グリース流動性は低くな
る。EXAMPLES Now, an experiment conducted to confirm the effect of the bearing device shown in the above-mentioned embodiment will be described. First, the grease behavior inside the bearing was observed. FIG. 25 shows a schematic diagram of the observation test device. In this embodiment, the anti-load side portion 3'of the bearing outer ring 3 and the sealing plate (seal) 9 portion are made of transparent acrylic so that the grease behavior can be confirmed. For the observation, a strobe device S or a high-speed video V was used, and the inner ring 2 was rotated and photographed. The grease was colored with a dye and sealed in the space of the cage 5 opposite to the pocket side 5b. Figure 2
5 (a) is the case where the preload Fao is applied to the inner ring end surface of the cage non-opening side 5b and the outer ring end surface of the cage opening side 5a (also referred to as the conventional art), and (b) is the cage opening. It is assumed that the preload Fao is applied to the inner ring end surface of the side 5a and the outer ring end surface of the cage non-opening side 5b (also referred to as the case of the present invention). "In the case of the prior art" The grease existing on the raceway surface 3a of the outer ring 3 is removed to the outside of the raceway surface 3a by the balls 4 passing through, and most of the grease is left on the pocket non-opening side 5 of the cage 5.
b (outer ring anti-load side direction), and pocket anti-opening side 5
It interacts with the grease flowing in the radial direction from between the end surface b and the inner surface of the seal 9. On the other hand, the cage pocket opening side 5
The slight amount of grease that collects in the space a flows through the balls 4 only when it contacts the balls 4, and other grease hardly flows. "In the case of the present invention" The grease existing on the raceway surface 3a of the outer ring 3 is removed to the outside of the raceway surface 3a by passing the balls 4, and most of the grease is in the pocket opening side 5a direction of the cage 5 (outer ring counter load). Flow in the lateral direction) and accumulate in the space on the cage pocket opening side 5a. The grease flows through the balls 4 only when coming into contact with the balls 4, and other grease hardly flows. On the other hand, the cage pocket opposite to the opening side 5b
A small amount of grease flowing in the
It interacts with the grease flowing radially outward from between the end surface and the inner surface of the seal 9. From the above, in the case of
In either case, the grease existing on the outer ring raceway surface 3a (the grease that comes into contact with the balls 4, the inner ring 2, and the cage 5 and receives the centrifugal force is blown outward in the radial direction to the outer ring side). It becomes easier to supply the balls 4) when the balls 4 are on the raceway surface 3a.
It was found that most of them flowed toward the outer ring anti-load side by passing over. Therefore, in the case of
The grease tends to come into contact with the cage 5, and the grease flow becomes active. On the other hand, in the case of 1, the grease tends to accumulate in the space on the cage pocket opening side 5a, so the grease fluidity is lower than in the case of.
【００３３】「実験１」次に、本実施例の効果を確認す
るために行った実験の結果を図２６に示す。実験は、上
記の場合の予圧パターンを採り入れた従来構成の軸受
装置（図３０）と、上記の場合の予圧パターンを採り
入れた本発明構成の軸受装置（図１）を用いて、軸受温
度上昇（外輪温度から大気温度を差し引いた値）を計測
した。条件は、上述のように予圧パターンが相違する以
外は双方共同一である。
軸 受：内径３０ｍｍ、外径７２ｍｍ、幅１９ｍｍ
の単列深みぞ玉軸受
回 転 数：５０ｓ−１（３０００ｒｐｍ）（内輪回
転）
予 圧：アキシアル荷重 ４９０Ｎ
試験時間 ：５時間
図２６から分かるように、本発明（本実施例）は従来技
術（従来例）に比べ、温度上昇が低く、低トルクである
ことが分かる。従って、本発明を用いれば、軸受内部の
グリース流動は早期に安定するため、低トルク化が図れ
る。なお、本試験では内輪回転で行なったが、外輪回転
の場合においても、外輪軌道面上に存在するグリースの
流動特性は内輪回転の場合と同様と考えて良いため、内
・外輪回転どちらの場合においても、本発明で採用した
予圧パターンを用いれば低トルク化が図れる。また、ア
キシアル荷重とラジアル荷重が同時に負荷される場合に
おいても、接触角は０度にならないため、その効果は上
記実施例の場合と同様に考えて良い。[Experiment 1] Next, FIG. 26 shows the result of an experiment conducted to confirm the effect of this embodiment. In the experiment, a bearing device having a conventional structure (FIG. 30) adopting the preload pattern in the above case and a bearing device having the structure of the present invention adopting the preload pattern in the above case (FIG. 1) were used. The value obtained by subtracting the atmospheric temperature from the outer ring temperature) was measured. The conditions are common to both parties except that the preload patterns are different as described above. Bearing: inner diameter 30mm, outer diameter 72mm, width 19mm
Single-row deep groove ball bearings Rotation speed: 50 s −1 (3000 rpm) (inner ring rotation) Preload: Axial load 490 N Test time: 5 hours As can be seen from FIG. 26, the present invention (this embodiment) is a conventional technology ( It can be seen that the temperature rise is low and the torque is low compared to the conventional example). Therefore, according to the present invention, the grease flow inside the bearing is stabilized at an early stage, so that the torque can be reduced. In this test, the inner ring was rotated, but even in the case of the outer ring rotation, the flow characteristics of the grease existing on the outer ring raceway may be considered to be the same as in the case of the inner ring rotation. Also in this case, the torque can be reduced by using the preload pattern adopted in the present invention. Further, even when the axial load and the radial load are simultaneously applied, the contact angle does not become 0 degree, so that the effect can be considered as in the case of the above embodiment.
【００３４】「実験２」次に、図２７に示すＨＤＤ／Ｓ
ＰＭ装置に、従来構成の軸受装置（図３０）と、本発明
構成の軸受装置（図１）を配することにより、両者のト
ルク、ＮＲＲＯの時系列的変化を比較した。なお、本実
験では、ＨＤＤ／ＳＰＭ装置の軸（シャフト）６の一端
側に立上げ形成した段部６ａに、一方の軸受（図２７で
下方の軸受）１における内輪２の端面２ｂを突き当て、
そして双方の軸受１，１の外輪３，３間に、ハウジング
の内径面に周設した段付き部８を位置させ、そして他方
の軸受（図２７で上方の軸受）１における内輪２の端面
２ｂに所望する予圧荷重と等しい重り又はバネ力を加え
接着固定している。この場合、接着に代えて圧入として
もよい。
軸 受：内径５ｍｍ、外径１３ｍｍ、幅３ｍｍの情
報機器用ミニチュア玉軸受
回 転 数：１２０s−１（７２００ｒｐｍ）（外輪回
転）
予 圧：アキシアル荷重 １１．７６Ｎ（１．２ｋ
ｇｆ）
試験時間 ：２ｈｒ
図２８と図２９に比較試験の結果を示す。図２８は本発
明構成の結果、図２９は従来構成の結果を示す（夫々の
図で（ａ）はトルクの時系列的変化、（ｂ）はＮＲＲＯ
の時系列的変化を示す）。この結果から、本発明の軸受
装置によれば、トルクおよびその変動が低く、かつＮＲ
ＲＯも小さいことが明瞭で、これを従来装置の結果と比
すれば、本発明装置の方がトルク、ＮＲＲＯともに優れ
ていることが確認できた。なお、本実施例は外輪回転で
あるが、内輪回転においても同様の効果を確認すること
が出来た。また、回転数および予圧量に関する制限はな
い。[Experiment 2] Next, the HDD / S shown in FIG.
By arranging the bearing device having the conventional configuration (FIG. 30) and the bearing device having the configuration of the present invention (FIG. 1) in the PM device, the torque and the NRRO of both of them were compared in time series. In this experiment, the end face 2b of the inner ring 2 of one bearing (the lower bearing in FIG. 27) was abutted against the stepped portion 6a formed upright on one end side of the shaft 6 of the HDD / SPM device. ,
Then, the stepped portion 8 provided around the inner diameter surface of the housing is located between the outer rings 3 and 3 of both bearings 1 and 1, and the end surface 2b of the inner ring 2 in the other bearing (upper bearing in FIG. 27) 1 is positioned. Then, a weight or a spring force equal to the desired preload is applied to fix the adhesive. In this case, press-fitting may be used instead of adhesion. Bearing: Miniature ball bearing for information equipment with inner diameter 5mm, outer diameter 13mm, width 3mm Rotation speed: 120s -1 (7200rpm) (outer ring rotation) Preload: Axial load 11.76N (1.2k)
gf) Test time: 2 hr FIG. 28 and FIG. 29 show the results of the comparative test. FIG. 28 shows the result of the configuration of the present invention, and FIG. 29 shows the result of the conventional configuration ((a) in each figure shows a time series change of torque, (b) shows NRRO.
Shows the change over time). From this result, according to the bearing device of the present invention, the torque and its fluctuation are low, and NR
It is clear that the RO is also small, and comparing this with the result of the conventional device, it was confirmed that the device of the present invention is superior in both torque and NRRO. It should be noted that although the present embodiment is the outer ring rotation, the same effect could be confirmed in the inner ring rotation. Further, there is no limitation on the rotation speed and the amount of preload.
【００３５】[0035]
【発明の効果】本発明によると、上述した構成を有して
いるため、回転時に外輪溝に移動したグリースが多く溜
まっても、反接触角側の溝部から溝肩部に溜まるため、
保持器との距離が大きく保持器に巻き込まれることが少
なく低トルクで安定する。また、外輪溝部に溜まったグ
リースが玉に巻き込まれても、保持器の爪先端部付近で
掻き取られ、保持器ポケット間の爪の間に保持され安定
するため、グリースの攪拌が少なく低トルクで安定する
効果を有する。従って、回転トルクやその変動が小さ
く、回転精度の高い軸受装置を提供することができる。According to the present invention, because of the above-described structure, even if a large amount of grease that has moved to the outer ring groove during rotation is collected, it is collected from the groove on the side opposite to the contact angle to the groove shoulder.
The distance from the cage is large and the cage is less likely to be caught in the cage, resulting in low torque and stability. Also, even if the grease collected in the outer ring groove is caught in the balls, it is scraped off near the tips of the cage's claws and held between the cage pockets for stability, so there is less grease agitation and low torque. It has the effect of stabilizing. Therefore, it is possible to provide a bearing device having a small rotational torque and its fluctuation and high rotational accuracy.
【図１】本発明軸受装置の第一実施形態を示す断面概略
図。FIG. 1 is a schematic sectional view showing a first embodiment of a bearing device of the present invention.
【図２】第一実施形態における保持器組込み方向を拡大
して示す概略図。FIG. 2 is a schematic view showing a retainer assembling direction in an enlarged manner in the first embodiment.
【図３】本発明軸受装置の第二実施形態を示す断面概略
図。FIG. 3 is a schematic sectional view showing a second embodiment of the bearing device of the present invention.
【図４】本発明軸受装置の第三実施形態を示す断面概略
図。FIG. 4 is a schematic sectional view showing a third embodiment of the bearing device of the present invention.
【図５】第三実施形態における保持器組込み方向を拡大
して示す概略図。FIG. 5 is a schematic view showing a retainer assembling direction in an enlarged manner in a third embodiment.
【図６】本発明軸受装置の第四実施形態を示す断面概略
図。FIG. 6 is a schematic cross-sectional view showing a fourth embodiment of the bearing device of the present invention.
【図７】本発明軸受装置の第五実施形態を示す断面概略
図。FIG. 7 is a schematic sectional view showing a fifth embodiment of the bearing device of the present invention.
【図８】本発明軸受装置の第六実施形態を示す断面概略
図。FIG. 8 is a schematic sectional view showing a sixth embodiment of the bearing device of the present invention.
【図９】本発明軸受装置の第七実施形態を示す断面概略
図。FIG. 9 is a schematic cross-sectional view showing a seventh embodiment of the bearing device of the present invention.
【図１０】本発明軸受装置の第八実施形態を示す断面概
略図。FIG. 10 is a schematic sectional view showing an eighth embodiment of the bearing device of the present invention.
【図１１】本発明軸受装置の第九実施形態を示す断面概
略図。FIG. 11 is a schematic sectional view showing a ninth embodiment of the bearing device of the present invention.
【図１２】本発明軸受装置の第十実施形態を示す断面概
略図。FIG. 12 is a schematic sectional view showing a tenth embodiment of the bearing device of the present invention.
【図１３】本発明軸受装置の第十一実施形態を示す半断
面概略図。FIG. 13 is a schematic half sectional view showing an eleventh embodiment of the bearing device of the present invention.
【図１４】（ａ）は第十一実施形態における保持器組込
み方向を拡大して示す概略図、（ｂ）は保持器爪部分を
平面から見た状態の部分拡大概略図。FIG. 14A is an enlarged schematic view showing a retainer assembling direction in the eleventh embodiment, and FIG. 14B is a partially enlarged schematic view of a retainer claw portion seen from a plane.
【図１５】第十一実施形態における軸受装置の組立方法
を示す概略図。FIG. 15 is a schematic view showing a method of assembling the bearing device according to the eleventh embodiment.
【図１６】本発明軸受装置の第十二実施形態を示す断面
概略図。FIG. 16 is a schematic sectional view showing a twelfth embodiment of the bearing device of the present invention.
【図１７】本発明軸受装置の第十三実施形態を示す断面
概略図。FIG. 17 is a schematic sectional view showing a thirteenth embodiment of the bearing device of the present invention.
【図１８】本発明軸受装置の第十四実施形態を示す断面
概略図。FIG. 18 is a schematic sectional view showing a fourteenth embodiment of the bearing device of the present invention.
【図１９】本発明軸受装置の第十五実施形態を示す半断
面概略図。FIG. 19 is a schematic half sectional view showing a fifteenth embodiment of the bearing device of the present invention.
【図２０】本発明軸受装置の第十六実施形態を示す半断
面概略図。FIG. 20 is a schematic half sectional view showing a sixteenth embodiment of the bearing device of the present invention.
【図２１】本発明軸受装置の第十七実施形態を示す半断
面概略図。FIG. 21 is a schematic half-sectional view showing a seventeenth embodiment of the bearing device of the present invention.
【図２２】本発明軸受装置の第十八実施形態を示す断面
概略図。FIG. 22 is a schematic sectional view showing an eighteenth embodiment of the bearing device of the present invention.
【図２３】本発明軸受装置の第十九実施形態を示す断面
概略図。FIG. 23 is a schematic sectional view showing a nineteenth embodiment of the bearing device of the present invention.
【図２４】保持器の組込み方向を判別可能とする差異を
設けた図で、（ａ）は概略断面図、（ｂ）は正面図。24A and 24B are diagrams in which a difference is provided so that the mounting direction of the cage can be determined, FIG. 24A is a schematic sectional view, and FIG.
【図２５】軸受内部のグリース挙動を観察するために行
なった実験の概略図（（ａ）は従来技術の場合、（ｂ）
は本発明の場合）。FIG. 25 is a schematic view of an experiment conducted for observing the grease behavior inside the bearing ((a) shows the case of the prior art, (b) shows
Is the case of the present invention).
【図２６】本発明の効果を確認するために行なった実験
１の結果。FIG. 26 is a result of Experiment 1 performed to confirm the effect of the present invention.
【図２７】ＨＤＤ／ＳＰＭ装置の断面概略図。FIG. 27 is a schematic sectional view of an HDD / SPM device.
【図２８】本発明の効果を確認するために行なった実験
２の結果（（ａ）はトルクの時系列的変化、（ｂ）はＮ
ＲＲＯの時系列的変化）を示す図。FIG. 28 is a result of an experiment 2 performed to confirm the effect of the present invention ((a) is a time series change of torque, and (b) is N).
The figure which shows the time series change of RRO.
【図２９】従来技術の効果を確認する為に行った実験結
果（（ａ）はトルクの時系列的変化、（ｂ）はＮＲＲＯ
の時系列的変化）を示す図。FIG. 29 is a result of an experiment conducted to confirm the effect of the conventional technique ((a) is a time series change of torque, (b) is NRRO).
FIG.
【図３０】従来技術の軸受装置を示す断面概略図。FIG. 30 is a schematic sectional view showing a conventional bearing device.
【図３１】従来技術の軸受装置を示す断面概略図。FIG. 31 is a schematic cross-sectional view showing a conventional bearing device.
【図３２】図３１における保持器組込み方向を拡大して
示す概略図。32 is an enlarged schematic view showing the direction in which the cage is assembled in FIG. 31. FIG.
１：転がり軸受 ２：内輪 ２ｂ：保持器ポケット開口側端面 ３：外輪 ３ｂ：保持器ポケット反開口側端面 ５：冠形保持器 ５ａ：保持器ポケット開口側 ５ｂ：保持器ポケット反開口側 ６：軸（シャフト） ６ｂ：軸段部 1: Rolling bearing 2: Inner ring 2b: Cage pocket opening side end surface 3: Outer ring 3b: end surface of cage pocket opposite to the opening side 5: Crown type cage 5a: cage pocket opening side 5b: cage pocket non-opening side 6: Shaft 6b: Shaft step
───────────────────────────────────────────────────── フロントページの続き (72)発明者 青木 護 神奈川県藤沢市鵠沼神明１丁目５番50号日 本精工株式会社内 (72)発明者 縄本 大綱 神奈川県藤沢市鵠沼神明１丁目５番50号日 本精工株式会社内 (72)発明者 荒牧 宏敏 神奈川県藤沢市鵠沼神明１丁目５番50号日 本精工株式会社内 Ｆターム(参考） 3J012 AB07 AB12 DB07 FB10 HB02 3J101 AA02 AA32 AA42 AA43 AA52 AA62 BA25 CA14 EA63 FA41 GA53 ─────────────────────────────────────────────────── ─── Continued front page (72) Inventor Mamoru Aoki 1-5-50 Shinmei Kugenuma, Fujisawa City, Kanagawa Prefecture Honseiko Co., Ltd. (72) Inventor Nasumoto Otsuna 1-5-50 Shinmei Kugenuma, Fujisawa City, Kanagawa Prefecture Honseiko Co., Ltd. (72) Inventor Hirotoshi Aramaki 1-5-50 Shinmei Kugenuma, Fujisawa City, Kanagawa Prefecture Honseiko Co., Ltd. F term (reference) 3J012 AB07 AB12 DB07 FB10 HB02 3J101 AA02 AA32 AA42 AA43 AA52 AA62 BA25 CA14 EA63 FA41 GA53
Claims (14)
てなる軸受装置において、内輪の保持器開口側及び外輪
の保持器反開口側に予圧が印加されていることを特徴と
する軸受装置。1. A bearing device in which a bearing incorporating a crown-shaped cage is fixed to a shaft, wherein a preload is applied to the cage opening side of the inner ring and the cage non-opening side of the outer ring. Bearing device.
固定してなる軸受装置において、内輪の保持器開口側及
び外輪の保持器反開口側に予圧が印加されて組み合わせ
られたことを特徴とする軸受装置。2. A bearing device in which two bearings having a crown-shaped cage are fixed to a shaft are combined by applying a preload to the cage opening side of the inner ring and the cage non-opening side of the outer ring. A bearing device characterized by the above.
ケット反開口側同士が向き合うように組み込まれている
ことを特徴とする請求項２に記載の軸受装置。3. The bearing device according to claim 2, wherein the cages of the two bearings are installed such that the pocket opposite sides of the respective pockets face each other.
ケット開口側同士が向き合うように組み込まれているこ
とを特徴とする請求項２に記載の軸受装置。4. The bearing device according to claim 2, wherein the cages of the two bearings are installed so that the pocket opening sides thereof face each other.
輪間を離間する方向に予圧した複列の軸受装置におい
て、両軸受における冠形保持器のポケット反開口側同士
が向き合うように組み込まれていることを特徴とする軸
受装置。5. In a double-row bearing device in which a spring is arranged between the outer races of both rows to preload the outer races in a direction in which the outer races are separated from each other, the pocket opposite sides of the crown type cages of both bearings face each other. Bearing device characterized by being incorporated.
の玉軸受装置において、両軸受の冠形保持器のポケット
開口側同士が向き合うように組み込まれていることを特
徴とする軸受装置。6. A double-row ball bearing device preloaded in a direction in which the outer races of both rows approach each other, characterized in that the crown-shaped cages of both bearings are assembled so that the pocket opening sides face each other. apparatus.
の玉軸受装置において、両軸受の冠形保持器のポケット
反開口側同士が向き合うように組み込まれていることを
特徴とする軸受装置。7. A double-row ball bearing device preloaded in a direction in which the inner races of both rows come closer to each other is characterized in that the crown-shaped cages of both bearings are assembled so that the pocket non-opening sides face each other. Bearing device.
輪間を離間する方向に予圧した複列の軸受装置におい
て、両軸受における冠形保持器のポケット開口側同士が
向き合うように組み込まれていることを特徴とする軸受
装置。8. A double-row bearing device preloaded in a direction in which the inner rings are separated by a spring arranged between the inner rings of the two rows, so that the pocket opening sides of the crown type cages of both bearings face each other. Bearing device characterized by being
項５又は６のいずれかに記載の軸受装置。9. The bearing device according to claim 5, wherein the shaft has double rows of grooves.
定されていることを特徴とする請求項５乃至８のいずれ
かに記載の軸受装置。10. The bearing device according to claim 5, wherein the shaft has one groove and the other has an inner ring fixed thereto.
とを特徴とする請求項５に記載の軸受装置。11. The bearing device according to claim 5, wherein a spring is arranged between the outer rings of the two bearings.
に玉の軌道溝があることを特徴とする請求項５乃至８の
いずれかに記載の軸受装置。12. The bearing device according to claim 5, wherein at least a shaft or a part of the housing has a ball raceway groove.
ことを特徴とする請求項１乃至１２のいずれかに記載の
軸受装置。13. The bearing device according to claim 1, wherein the bearing device is either an outer ring rotating member or an inner ring rotating member.
保持器組込み方向を判別可能とする差異を設けたことを
特徴とする請求項１乃至１３のいずれかに記載の軸受装
置。14. Between one axial end surface and the other axial end surface,
The bearing device according to any one of claims 1 to 13, wherein a difference is provided so that the direction in which the cage is installed can be discriminated.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001350676A JP2003161318A (en) | 2001-07-10 | 2001-11-15 | Bearing unit |
| US10/190,837 US6896415B2 (en) | 2001-07-10 | 2002-07-09 | Rolling bearing and bearing apparatus |
| CNB021409080A CN1215269C (en) | 2001-07-10 | 2002-07-10 | Rolling bearing and bearing unit |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001-209387 | 2001-07-10 | ||
| JP2001209387 | 2001-07-10 | ||
| JP2001-278525 | 2001-09-13 | ||
| JP2001278525 | 2001-09-13 | ||
| JP2001350676A JP2003161318A (en) | 2001-07-10 | 2001-11-15 | Bearing unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003161318A true JP2003161318A (en) | 2003-06-06 |
Family
ID=27347130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001350676A Pending JP2003161318A (en) | 2001-07-10 | 2001-11-15 | Bearing unit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003161318A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011027662A1 (en) * | 2009-09-07 | 2011-03-10 | Ntn株式会社 | Sealed rolling bearing |
-
2001
- 2001-11-15 JP JP2001350676A patent/JP2003161318A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011027662A1 (en) * | 2009-09-07 | 2011-03-10 | Ntn株式会社 | Sealed rolling bearing |
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