JPH10252747A - Cylindrical roller bearing - Google Patents
Cylindrical roller bearingInfo
- Publication number
- JPH10252747A JPH10252747A JP5654697A JP5654697A JPH10252747A JP H10252747 A JPH10252747 A JP H10252747A JP 5654697 A JP5654697 A JP 5654697A JP 5654697 A JP5654697 A JP 5654697A JP H10252747 A JPH10252747 A JP H10252747A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- retainer
- rollers
- cylindrical roller
- roller
- 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
- Rolling Contact Bearings (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、作用するラジアル
荷重が標準軸受の負荷容量に比較して小さい条件下で使
用される円筒ころ軸受に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cylindrical roller bearing used under such a condition that the acting radial load is smaller than the load capacity of a standard bearing.
【0002】[0002]
【発明が解決しようとする課題】円筒ころ軸受は、円筒
状のころと軌道面とが線接触するためラジアル荷重の負
荷能力が大きく、また、ころが内輪又は外輪の鍔で案内
されるため高速回転にも適している。The cylindrical roller bearing has a large radial load-bearing capacity due to linear contact between the cylindrical roller and the raceway surface, and has a high speed because the rollers are guided by the inner ring or outer ring flange. Also suitable for rotation.
【0003】しかし、組み込まれる相手装置等との関係
で、標準の負荷容量に比較してラジアル荷重が小さい条
件下で運転される場合があり、この場合、作用するラジ
アル荷重の大きさによっては、ころが円滑に転動せず
(滑りが発生する)、適正な軸受機能が確保されないこ
とがある。一般に、軸受に作用するラジアル荷重Pが、
当該軸受の基本静定格荷重の4%以下の場合に、ころの
円滑な転動が妨げられる現象が起こり得るといわれてい
る。特に、大型(軸受内径が300φ以上)で薄肉の軸
受の場合、ころの本数が多くなるため、その傾向が強
く、さらに、使用条件に応じてラジアル内部すきま(初
期すきま)を普通すきまより大きく設定する場合、その
傾向がより強い。However, there are cases where the operation is performed under the condition that the radial load is smaller than the standard load capacity due to the relationship with the counterpart device or the like to be incorporated. In this case, depending on the magnitude of the acting radial load, The rollers do not roll smoothly (slip occurs), and an appropriate bearing function may not be secured. Generally, the radial load P acting on the bearing is
It is said that, when the basic static load rating of the bearing is 4% or less, a phenomenon that smooth rolling of the rollers is prevented may occur. In particular, in the case of a large-sized (bearing inner diameter of 300φ or more) thin bearing, the number of rollers increases, so this tendency is strong. In addition, the radial internal clearance (initial clearance) is set to be larger than the normal clearance according to the use conditions. If so, the tendency is stronger.
【0004】本発明は、軽ラジアル荷重下における円筒
ころの円滑な転動を確保し、それによって適正な軸受機
能を確保すると同時に、軸受の耐久性向上を図ることを
目的とする。An object of the present invention is to ensure smooth rolling of a cylindrical roller under a light radial load, thereby ensuring an appropriate bearing function and at the same time improving the durability of a bearing.
【0005】[0005]
【課題を解決するための手段】本発明は、作用するラジ
アル荷重Pが標準軸受の基本静定格荷重Corの4%以
下の条件で使用される円筒ころ軸受を対象とする。SUMMARY OF THE INVENTION The present invention is directed to a cylindrical roller bearing used under a condition that an applied radial load P is 4% or less of a basic static load rating Cor of a standard bearing.
【0006】本発明の円筒ころ軸受は、内輪と、外輪
と、内輪と外輪との間に介在する複数の円筒ころと、円
筒ころを保持する複数のポケットを有する削り加工によ
る保持器とを備えている。そして、当該軸受の基本静定
格荷重Cor’が上記ラジアル荷重Pに対してP>0.
04Cor’となるように円筒ころの本数が設定され、
かつ、保持器の円周方向に隣り合ったポケット間の柱部
に半径方向に貫通した貫通穴を有することを特徴とす
る。A cylindrical roller bearing according to the present invention includes an inner ring, an outer ring, a plurality of cylindrical rollers interposed between the inner ring and the outer ring, and a cage formed by shaving and having a plurality of pockets for holding the cylindrical rollers. ing. Then, the basic static load rating Cor 'of the bearing is such that P> 0.
The number of cylindrical rollers is set to be 04Cor ',
In addition, the retainer has a through-hole penetrating in a radial direction in a pillar portion between pockets adjacent in the circumferential direction of the retainer.
【0007】ここで、「基本静定格荷重」とは、一般
に、最大応力を受けている軌道面と転動体との接触部中
央で転動体直径の0.0001倍の総永久変形量を生じ
させる静荷重をいう。標準軸受の基本静定格荷重Cor
は、軸受形式、軸受サイズごとに製品カタログに表示さ
れている。Here, the "basic static load rating" generally causes a total permanent deformation of 0.0001 times the rolling element diameter at the center of the contact portion between the raceway surface receiving the maximum stress and the rolling element. Refers to static load. Basic static load rating of standard bearing Cor
Are displayed in the product catalog for each bearing type and bearing size.
【0008】基本静定格荷重は転動体の数に比例し、転
動体の数が少なくなれば、それに比例して減少する。こ
のことを利用して、円筒ころの円滑な転動が確保される
荷重条件となるように円筒ころの本数を設定する。具体
的には、作用するラジアル荷重P、当該軸受の基本静定
格荷重をCor’として、P>0.04Cor’となる
ように、円筒ころの本数を標準軸受のそれよりも少なく
する。これにより、各円筒ころに適正なラジアル荷重が
負荷され、円筒ころの円滑な転動が確保される。The basic static load rating is proportional to the number of rolling elements, and decreases as the number of rolling elements decreases. Taking advantage of this, the number of cylindrical rollers is set so as to satisfy the load condition under which smooth rolling of the cylindrical rollers is ensured. Specifically, the number of cylindrical rollers is made smaller than that of the standard bearing so that the radial load P acting and the basic static load rating of the bearing are Cor ', and P>0.04Cor'. As a result, an appropriate radial load is applied to each cylindrical roller, and smooth rolling of the cylindrical rollers is ensured.
【0009】一方、円筒ころの本数を少なくすると、保
持器の柱部の円周方向寸法が増大し(ポケットの数が少
なくなるため)、保持器の重量増大につながる。保持器
の重量増大は、ころ案内(保持器を円筒ころで案内する
形式)では、保持器の振れ回り慣性の増大によって軸受
騒音の増大要因等となり、また、軌道輪案内(保持器を
軌道輪で案内する形式)では、保持器案内部の面圧上昇
による潤滑不足を招き易い。さらに、削り加工による保
持器(もみ抜き保持器)では、通常、柱部の内径側また
は外径側部分にころ落ち止めが設けられており、組込み
に際し、ころ落ち止めを弾性変形させながら円筒ころを
ポケット内に押し込む作業が必要になるが、柱部の円周
方向寸法が増大し、その剛性が高くなりすぎると、円筒
ころの組込み作業が困難になるという問題もある。On the other hand, if the number of cylindrical rollers is reduced, the circumferential dimension of the pillar portion of the retainer increases (because the number of pockets decreases), which leads to an increase in the weight of the retainer. In the roller guide (type in which the cage is guided by cylindrical rollers), an increase in the weight of the cage causes an increase in bearing noise due to an increase in whirling inertia of the cage. In this case, lubrication shortage is likely to occur due to an increase in the surface pressure of the cage guide. In addition, in cages formed by shaving (milled cages), roller stoppers are usually provided on the inner diameter side or outer diameter side portion of the column, and during assembly, the roller rollers are elastically deformed and the cylindrical roller is deformed. However, if the rigidity of the column is too high and the rigidity thereof is too high, there is a problem that the work of assembling the cylindrical roller becomes difficult.
【0010】本発明において、保持器の柱部に半径方向
に貫通する貫通穴を形成したのは、円筒ころの本数を少
なくすることに伴う上記のような弊害を解消するためで
ある。すなわち、保持器の柱部に貫通穴を形成すること
により、保持器の重量が軽減され、軸受内部におけ
る潤滑剤の流通が促進され、円筒ころの組み込みに必
要な柱部の弾性が確保されるので、上記弊害が解消され
る。[0010] In the present invention, the reason why the through hole is formed in the pillar portion of the cage in the radial direction is to eliminate the above-mentioned adverse effects caused by reducing the number of cylindrical rollers. That is, by forming a through hole in the pillar portion of the cage, the weight of the cage is reduced, the flow of the lubricant inside the bearing is promoted, and the elasticity of the pillar portion necessary for incorporating the cylindrical roller is ensured. Therefore, the above-mentioned adverse effects are eliminated.
【0011】[0011]
【発明の実施の形態】以下、本発明の実施形態について
説明する。Embodiments of the present invention will be described below.
【0012】図1に示す円筒ころ軸受は、呼び軸受内径
が300φ(mm)以上の大型円筒ころ軸受で、内輪
1、外輪2、内輪1と外輪2との間に介在する複数の円
筒ころ3、円筒ころ3を保持する削り加工による保持器
(もみ抜き保持器)4を備えている。この実施形態にお
いて、内輪1は軌道面1aの両側に鍔1bを有し、鍔1
bの鍔面で円筒ころ3の端面を接触案内し、鍔1bの外
径面で保持器4の内径面を接触案内する。外輪2は軌道
面2aのみを有し、鍔は備えていない。潤滑方式は、特
に限定されないが、油潤滑によるのが望ましい。The cylindrical roller bearing shown in FIG. 1 is a large-sized cylindrical roller bearing having a nominal bearing inner diameter of 300 φ (mm) or more, and includes an inner ring 1, an outer ring 2, and a plurality of cylindrical rollers 3 interposed between the inner ring 1 and the outer ring 2. And a retainer (cut-out retainer) 4 formed by shaving to retain the cylindrical roller 3. In this embodiment, the inner race 1 has flanges 1b on both sides of the raceway surface 1a.
The end face of the cylindrical roller 3 is contact-guided by the flange face b, and the inner diameter face of the retainer 4 is contact-guided by the outer diameter face of the flange 1b. The outer ring 2 has only the raceway surface 2a and does not have a flange. The lubrication system is not particularly limited, but is preferably oil lubrication.
【0013】この実施形態の円筒ころ軸受は、ラジアル
荷重Pが同形式・同サイズの標準円筒ころ軸受の基本静
定格荷重Corの4%以下(P≦0.04Cor)の条
件下で使用される。また、ラジアル内部すきま(初期す
きま)は、普通すきまよりも大きく設定されている。そ
して、このような使用条件(軽ラジアル荷重)下におけ
る円筒ころ3の円滑な転動を確保するため、当該軸受の
基本静定格荷重Cor’が上記ラジアル荷重Pに対して
P>0.04Cor’となるように円筒ころの本数
(Z)が設定されている。The cylindrical roller bearing of this embodiment is used under the condition that the radial load P is 4% or less (P ≦ 0.04 Cor) of the basic static load rating Cor of a standard cylindrical roller bearing of the same type and size. . The radial internal clearance (initial clearance) is set to be larger than the normal clearance. Then, in order to ensure smooth rolling of the cylindrical roller 3 under such use conditions (light radial load), the basic static rated load Cor 'of the bearing is P>0.04Cor' with respect to the radial load P. The number (Z) of cylindrical rollers is set so that
【0014】例えば、軸受内径500φの標準円筒ころ
軸受の場合、基本静定格荷重Corは292000kg
f(製品カタログの記載値)、普通すきまは180〜3
20μm、円筒ころの標準本数(Z)は27本である。
この場合、P≦0.04Cor=11680kgfであ
る。円筒ころの適正本数(Z’)はラジアル荷重Pの大
きさによって変わってくるが、P=10000kgfと
仮定すると、P=10000>0.04Cor’より、
Cor’<250000となり、また、基本静定格荷重
は円筒ころの本数に比例するから、 Z’<27×(250000/292000)=23.
1(本) である。したがって、この場合、円筒ころ3の本数
(Z’)を23本以下の本数に設定することにより、各
円筒ころ3に適正なラジアル荷重を与えて、それらの円
滑な転動を確保することができる。For example, in the case of a standard cylindrical roller bearing having a bearing inner diameter of 500 φ, the basic static load rating Cor is 292,000 kg.
f (value described in product catalog), normal clearance is 180 to 3
The standard number (Z) of 20 μm cylindrical rollers is 27.
In this case, P ≦ 0.04Cor = 11680 kgf. The appropriate number of cylindrical rollers (Z ') varies depending on the magnitude of the radial load P. Assuming that P = 10000 kgf, P = 10000>0.04Cor',
Cor '<250,000, and since the basic static load rating is proportional to the number of cylindrical rollers, Z'<27 × (250,000 / 292000) = 23.
1 (book). Therefore, in this case, by setting the number (Z ') of the cylindrical rollers 3 to 23 or less, it is possible to apply an appropriate radial load to each cylindrical roller 3 and to ensure smooth rolling thereof. it can.
【0015】図2に拡大して示すように、保持器4は、
円筒ころ3を収容保持するための複数のポケット4aを
円周等配位置に備え、ポケット4aの軸方向両側が内輪
1に案内される環状部4b、円周方向に隣り合ったポケ
ット4a間が幅広の柱部4cになった環体である。上述
のように、この実施形態の円筒ころ軸受は、標準軸受に
比べ、円筒ころ3の本数を少なくしているため、保持器
4のポケット4aの数が標準保持器に比べて少なく、そ
の分、柱部4cが幅広になっている。As shown in FIG. 2 in an enlarged manner, the retainer 4
A plurality of pockets 4a for accommodating and holding the cylindrical roller 3 are provided at equal circumferential positions, and an annular portion 4b in which both sides in the axial direction of the pocket 4a are guided by the inner ring 1 and a pocket 4a adjacent in the circumferential direction are provided. It is an annular body that has become a wide pillar portion 4c. As described above, in the cylindrical roller bearing of this embodiment, the number of the cylindrical rollers 3 is smaller than that of the standard bearing. Therefore, the number of pockets 4a of the retainer 4 is smaller than that of the standard retainer. , The column portion 4c is wide.
【0016】柱部4cの内径側部分には、円筒ころ3の
脱落を防止するためのころ落ち止め4eが設けられてい
る。円筒ころ3をポケット4aに収容するに際しては、
円筒ころ3を内径側からころ落ち止め4eに押し当て、
ころ落ち止め4eを円周方向に弾性的に押し広げながら
円筒ころ3をポケット4a内に押し込む。A roller stopper 4e for preventing the cylindrical roller 3 from falling off is provided on the inner diameter side portion of the column 4c. When accommodating the cylindrical roller 3 in the pocket 4a,
Press the cylindrical roller 3 against the roller stopper 4e from the inner diameter side,
The cylindrical roller 3 is pushed into the pocket 4a while elastically expanding the roller stopper 4e in the circumferential direction.
【0017】さらに、各柱部4cには、それぞれ、保
持器4の重量を軽減し、軸受内部における潤滑剤の流
通を促進し、円筒ころ3のポケット4aへの組み込み
に必要な柱部4cの弾性を確保するための、貫通穴4f
が設けられている。各貫通穴4fは、各柱部4cの円周
方向中央部分を半径方向に抜き加工したものでる。この
実施形態における貫通穴4fは長穴状で、軸方向幅はポ
ケット4aのそれと同程度、円周方向幅は柱部4cのそ
れの1/3程度である。貫通穴4fの軸方向両端部は円
弧になっているが、これは応力集中を緩和するためであ
る。尚、貫通穴の形状、寸法、個数は上記の機能
を確保し得る範囲で適宜決めれば良く、特に上記の例示
内容に限定されるものではない。例えば、貫通穴の形状
として、円形、長方形や六角形等の多角形状を採用する
こともできる。Further, each of the pillars 4c reduces the weight of the retainer 4, promotes the flow of the lubricant inside the bearing, and forms the pillars 4c necessary for incorporation into the pockets 4a of the cylindrical rollers 3. Through hole 4f to ensure elasticity
Is provided. Each through-hole 4f is formed by radially punching a center portion of each pillar 4c in the circumferential direction. The through hole 4f in this embodiment has a long hole shape, and has an axial width approximately equal to that of the pocket 4a and a circumferential width approximately 1/3 that of the column portion 4c. Both ends in the axial direction of the through hole 4f are circular arcs, in order to reduce stress concentration. The shape, size, and number of the through holes may be appropriately determined as long as the above functions can be ensured, and are not particularly limited to the above examples. For example, a polygonal shape such as a circle, a rectangle, and a hexagon can be adopted as the shape of the through hole.
【0018】貫通穴4fの体積相当分だけ保持器4の
重量が軽減することにより、保持器4と内輪1との接触
部分(案内部)における接触面圧が低減されるので、案
内部の摩耗軽減につながる。また、軸受内部の潤滑油
が貫通穴4fを介して内径側または外径側に流通するこ
とができるので、軌道面1a、2aや保持器4の案内部
における潤滑条件が有利になる。さらに、貫通穴4f
を形成することにより、柱部4cに適度な弾性が付与さ
れるので、円筒ころ3をポケット4aに組み込む際の作
業も容易になる。Since the weight of the retainer 4 is reduced by an amount corresponding to the volume of the through hole 4f, the contact surface pressure at the contact portion (guide portion) between the retainer 4 and the inner ring 1 is reduced, so that the guide portion is worn. It leads to reduction. In addition, since the lubricating oil inside the bearing can flow to the inner diameter side or the outer diameter side through the through hole 4f, lubrication conditions in the raceway surfaces 1a, 2a and the guide portion of the retainer 4 are advantageous. Furthermore, the through hole 4f
By forming, the column portion 4c is given an appropriate elasticity, so that the operation when the cylindrical roller 3 is incorporated into the pocket 4a is also facilitated.
【0019】[0019]
【効果】以上説明したように、本発明によれば、当該軸
受の基本静定格荷重Cor’がラジアル荷重Pに対して
P>0.04Cor’となるように円筒ころの本数を設
定したので、軽ラジアル荷重下においても円筒ころの円
滑な転動が確保され、適正な軸受機能が発揮される。こ
れにより、軸受寿命の増大を図ることができる。同時
に、保持器の柱部に形成した貫通穴により、保持器の重
量が軽減され、軸受内部における潤滑剤の流通が促進さ
れ、円筒ころの組み込みに必要な柱部の弾性が確保され
るので、上記手段を採用することに伴う軸受騒音増大、
保持器案内部の面圧増大、潤滑不足、円筒ころの組み込
み上の問題を解消することができる。As described above, according to the present invention, the number of cylindrical rollers is set so that the basic static load rating Cor 'of the bearing is such that P>0.04Cor' with respect to the radial load P. Even under a light radial load, smooth rolling of the cylindrical rollers is ensured, and an appropriate bearing function is exhibited. Thereby, the life of the bearing can be increased. At the same time, the through hole formed in the column of the cage reduces the weight of the cage, promotes the flow of lubricant inside the bearing, and ensures the elasticity of the column required for incorporating the cylindrical roller. Increase in bearing noise due to adoption of the above means,
It is possible to solve the problems of increasing the surface pressure of the cage guide, insufficient lubrication, and incorporation of the cylindrical rollers.
【図1】実施形態に係わる大型円筒ころ軸受の断面図で
ある。FIG. 1 is a sectional view of a large-sized cylindrical roller bearing according to an embodiment.
【図2】保持器の一部平面図(図a)、一部断面図(図
b)である。FIG. 2 is a partial plan view (FIG. A) and a partial cross-sectional view (FIG. B) of the cage.
1 内輪 2 外輪 3 円筒ころ 4 保持器 4a ポケット 4c 柱部 4f 貫通穴 DESCRIPTION OF SYMBOLS 1 Inner ring 2 Outer ring 3 Cylindrical roller 4 Cage 4a Pocket 4c Column part 4f Through hole
Claims (1)
本静定格荷重Corの4%以下の条件で使用される円筒
ころ軸受であって、 内輪と、外輪と、内輪と外輪との間に介在する複数の円
筒ころと、円筒ころを保持する複数のポケットを有する
削り加工による保持器とを備え、 当該軸受の基本静定格荷重Cor’が上記ラジアル荷重
Pに対してP>0.04Cor’となるように円筒ころ
の本数が設定され、かつ、保持器の円周方向に隣り合っ
たポケット間の柱部に半径方向に貫通した貫通穴を有す
ることを特徴とする円筒ころ軸受。1. A cylindrical roller bearing used under a condition that an applied radial load P is 4% or less of a basic static load rating Cor of a standard bearing, wherein an intermediate ring is provided between an inner ring, an outer ring, and an inner ring and an outer ring. A plurality of cylindrical rollers and a cage by shaving having a plurality of pockets for holding the cylindrical rollers, wherein the basic static load rating Cor 'of the bearing is P>0.04Cor' with respect to the radial load P. A cylindrical roller bearing, wherein the number of cylindrical rollers is set so as to form a cylindrical roller bearing, and a through-hole penetrating in a radial direction is provided in a pillar portion between pockets adjacent in a circumferential direction of the retainer.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5654697A JPH10252747A (en) | 1997-03-11 | 1997-03-11 | Cylindrical roller bearing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5654697A JPH10252747A (en) | 1997-03-11 | 1997-03-11 | Cylindrical roller bearing |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2002014296A Division JP2002221222A (en) | 2002-01-23 | 2002-01-23 | Cylindrical roller bearing |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH10252747A true JPH10252747A (en) | 1998-09-22 |
Family
ID=13030099
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5654697A Pending JPH10252747A (en) | 1997-03-11 | 1997-03-11 | Cylindrical roller bearing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH10252747A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007198431A (en) * | 2006-01-24 | 2007-08-09 | Nippon Thompson Co Ltd | Thrust bearing |
JP2009047243A (en) * | 2007-08-20 | 2009-03-05 | Nsk Ltd | Ball bearing |
JP2010164081A (en) * | 2009-01-13 | 2010-07-29 | Nsk Ltd | Cage and roller, and radial needle bearing |
JP2013036526A (en) * | 2011-08-08 | 2013-02-21 | Nsk Ltd | Retainer for roller bearing |
CN106050931A (en) * | 2016-08-11 | 2016-10-26 | 瓦房店冶金轴承集团有限公司 | High-speed and light-load spherical roller bearing |
US10030708B2 (en) | 2016-07-29 | 2018-07-24 | General Electric Company | Roller bearing cage for use in a gearbox |
-
1997
- 1997-03-11 JP JP5654697A patent/JPH10252747A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007198431A (en) * | 2006-01-24 | 2007-08-09 | Nippon Thompson Co Ltd | Thrust bearing |
JP4624267B2 (en) * | 2006-01-24 | 2011-02-02 | 日本トムソン株式会社 | Thrust bearing |
JP2009047243A (en) * | 2007-08-20 | 2009-03-05 | Nsk Ltd | Ball bearing |
JP2010164081A (en) * | 2009-01-13 | 2010-07-29 | Nsk Ltd | Cage and roller, and radial needle bearing |
JP2013036526A (en) * | 2011-08-08 | 2013-02-21 | Nsk Ltd | Retainer for roller bearing |
US10030708B2 (en) | 2016-07-29 | 2018-07-24 | General Electric Company | Roller bearing cage for use in a gearbox |
CN106050931A (en) * | 2016-08-11 | 2016-10-26 | 瓦房店冶金轴承集团有限公司 | High-speed and light-load spherical roller bearing |
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