JP5567453B2 - Double row roller bearing and cage for double row roller bearing - Google Patents

Double row roller bearing and cage for double row roller bearing Download PDF

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JP5567453B2
JP5567453B2 JP2010249688A JP2010249688A JP5567453B2 JP 5567453 B2 JP5567453 B2 JP 5567453B2 JP 2010249688 A JP2010249688 A JP 2010249688A JP 2010249688 A JP2010249688 A JP 2010249688A JP 5567453 B2 JP5567453 B2 JP 5567453B2
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cage
roller bearing
double row
row roller
fin
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JP2012102764A (en
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直太 山本
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NTN Corp
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Description

この発明は、複列ころ軸受と、この軸受に組み込まれる保持器に関する。   The present invention relates to a double row roller bearing and a cage incorporated in the bearing.

複列ころ軸受の保持器は、円環部と、円環部から軸方向に延びる複数の柱部とを有し、柱部間にころを収容するポケットを設けた一対のくし型の保持器単体から構成され、これら保持器単体の円環部同士を互いに背中合わせにした状態で軸受に組み込まれている。   A cage for a double row roller bearing has a pair of comb-shaped cages having an annular portion and a plurality of column portions extending in the axial direction from the annular portion, and provided with pockets for accommodating rollers between the column portions. It is composed of a single unit, and is assembled into the bearing in a state where the ring portions of the single unit of the cage are back to back.

このように、保持器を複列ころ軸受に組み込んだ際には、保持器を構成する保持器単体の円環部は背中合わせになっているため、軸受運転中には、保持器単体の背面同士は擦れあい、摩耗する問題があった。
ここで、保持器単体の背面に、潤滑剤溜まりを設けて滑りを良くすることも考えられるが(特許文献１、図２参照)、摩耗の抑制には不十分であった。 As described above, when the cage is incorporated in the double row roller bearing, the annular portions of the cage constituting the cage are back-to-back. Had a problem of rubbing and wearing.
Here, it is conceivable to provide a lubricant reservoir on the back surface of the cage alone to improve sliding (see Patent Document 1 and FIG. 2), but it is insufficient for suppressing wear.

特開２００４−３０１２３２号公報JP 2004-301232 A

そこで、この発明は、複列ころ軸受の保持器の摩耗を抑えることを課題とする。   Then, this invention makes it a subject to suppress wear of the retainer of a double row roller bearing.

上記した課題を解決するため、２つのくし型の保持器単体から構成される、複列ころ軸受の保持器について、少なくとも一方のくし型保持器単体の外周面又は内周面に、複列ころ軸受の回転により、保持器単体のポケット側に推進力を生じさせるフィンを設けたのである。   In order to solve the above-described problems, a double row roller bearing cage composed of two comb type cages alone is provided on at least one of the comb type cages on the outer circumferential surface or inner circumferential surface thereof. Fins that generate propulsive force are provided on the pocket side of the cage alone by the rotation of the bearing.

このようにして、保持器単体の少なくとも一方に、ポケット側に推進力を生じさせると、保持器単体同士が離間するため、背面のこすれあいが減じられ、保持器の磨耗が抑えられる。
また、フィンは補強リブとしても機能するため、保持器単体の強度が向上する。 In this way, when a propulsive force is generated on at least one of the cages on the pocket side, the cages are separated from each other, so that rubbing on the back surface is reduced and wear of the cage is suppressed.
Further, since the fin also functions as a reinforcing rib, the strength of the cage alone is improved.

各保持器単体のフィンは、保持器単体の軸方向および周方向に対して傾斜して直線状に延びるものとすると、フィンの構造が簡単であるため、保持器単体周面上へのフィンの形成が容易である。
このような保持器を組み込んだ軸受を、軸受回転方向に対して、保持器単体の背面に近い側のフィン一端よりも、背面から遠い側のフィン他端が先行する向きに回転させると、その回転軌跡上の空気等の流体を保持器背面側に押し出し、その反作用として、保持器にそのポケット側へと向かう推進力が生じ、保持器単体同士が離間する。 If each cage single fin is inclined with respect to the axial direction and circumferential direction of the single cage and extends linearly, the fin structure is simple. Easy to form.
When a bearing incorporating such a cage is rotated in a direction in which the other end of the fin farther from the rear side precedes the one end of the fin closer to the rear side of the cage alone with respect to the bearing rotation direction, A fluid such as air on the rotation trajectory is pushed out to the rear side of the cage, and as a reaction, a propulsive force is generated in the cage toward the pocket side, and the cages are separated from each other.

ここで、保持器の円環部と柱部とフィンを合成樹脂により一体に射出成形し、そのウェルドライン上にフィンを配置すると、脆弱なウェルドラインが補強される。   Here, when the annular portion, the column portion, and the fin of the cage are integrally injection-molded with a synthetic resin and the fin is disposed on the weld line, the weak weld line is reinforced.

さらに、フィンが保持器の周方向または軸方向に複数並列している場合には、フィンとフィンの間には、潤滑剤が溜まりやすくなるため、この間が潤滑剤溜まりとしても機能し、軸受の潤滑性が向上する。   Furthermore, when a plurality of fins are juxtaposed in the circumferential direction or the axial direction of the cage, the lubricant easily collects between the fins, so that this space also functions as a lubricant reservoir. Lubricity is improved.

少なくとも一方の保持器単体に、軸受の回転によりポケット側への推進力を生じるフィンを設けたことにより、軸受の運転時に保持器単体同士が離間するため、保持器単体の背面同士のこすれあいが減じられ、保持器の摩耗が抑えられる。   By providing fins that generate propulsive force toward the pocket by rotation of the bearing on at least one cage unit, the cage units are separated from each other during the operation of the bearing. This reduces the wear on the cage.

外輪を外した軸受の全体斜視図Overall perspective view of bearing with outer ring removed 軸受の要部を示す断面図Sectional view showing the main part of the bearing ころを収納した保持器の要部を示す正面図Front view showing the main part of a cage containing rollers

以下、図面を参照しつつ、この発明の実施の形態について説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１から図３に示す、複列円筒ころ軸受１は、内輪２と、外輪３と、これら内外輪２，３の間に配置された二列の円筒ころ４と、円筒ころ４を収納保持する保持器１０とからなる。   A double-row cylindrical roller bearing 1 shown in FIGS. 1 to 3 accommodates and holds an inner ring 2, an outer ring 3, two rows of cylindrical rollers 4 disposed between the inner and outer rings 2 and 3, and the cylindrical rollers 4. And the cage 10 to be operated.

詳しくは、内輪２の外周面は、その軸方向中央および両側に鍔部２ａが設けられており、この鍔部２ａの間に形成される二列の軌道面２ｂと、これに対向する外輪３内周面の二列の軌道面３ａに各円筒ころ４は挟まれている。   Specifically, the outer peripheral surface of the inner ring 2 is provided with flanges 2a at the center and both sides in the axial direction, two rows of raceway surfaces 2b formed between the flanges 2a, and the outer ring 3 facing the two rows. Each cylindrical roller 4 is sandwiched between two rows of raceway surfaces 3a on the inner peripheral surface.

この内輪２は、工作機械等の主軸外周に嵌め合わされ、外輪３は、ハウジングの開口外周に嵌め合わされ、主軸が回転すると、これに従って内輪２が回転し、軌道面２ｂ、３ａに沿って円筒ころ４が回転することにより、軸受１は主軸を回転可能な状態で支持している。   The inner ring 2 is fitted on the outer periphery of the main shaft of a machine tool or the like, and the outer ring 3 is fitted on the outer periphery of the opening of the housing. When the main shaft is rotated, the inner ring 2 is rotated accordingly, and the cylindrical roller is moved along the raceway surfaces 2b and 3a. By rotating 4, the bearing 1 supports the main shaft in a rotatable state.

また、図示のように、保持器１０は、一対の保持器単体１１からなり、この保持器単体１１は、円環部１１ａと、円環部１１ａから保持器１０の軸方向一方に延びる複数の柱部１１ｂとを有するいわゆるくし型の保持器単体である。
保持器１０は、一対の保持器単体１１の円環部１１ａ同士が背中合わせになった状態で軸受１に組み込まれている。
保持器単体１１の柱部１１ｂの間には、ポケット１１ｃが形成されており、円筒ころ４をそれぞれ収納している。 As shown in the figure, the cage 10 includes a pair of cage units 11, and the cage unit 11 includes a ring portion 11 a and a plurality of ring portions 11 a extending in one axial direction of the cage 10. This is a so-called comb-shaped cage having a column portion 11b.
The cage 10 is incorporated in the bearing 1 with the annular portions 11a of the pair of cage single bodies 11 being back to back.
A pocket 11c is formed between the pillar portions 11b of the cage 11 and accommodates the cylindrical rollers 4 respectively.

さらに、各保持器単体１１の外周面には、周方向に等間隔を置いて並列する、相似形の複数のフィン１１ｄが設けられている。
図示のように、各フィン１１ｄは円環部１１ａ周面上の一端から柱部１１ｂ周面上の他端まで、直線状に延びており、保持器１０の軸方向および周方向に対して同一方向に傾斜している。
ここで、各フィン１１ｄの軸方向に対する傾斜角はほぼ等しくなっており、フィン１１ｄはその幅および厚みが、円環部１１ａ上の端部から柱部１１ｂ上の端部に向かって漸減することで、ほぼ楔形の外観を呈している。 Furthermore, a plurality of similar-shaped fins 11d that are arranged in parallel at equal intervals in the circumferential direction are provided on the outer peripheral surface of each cage unit 11.
As illustrated, each fin 11d extends linearly from one end on the circumferential surface of the annular portion 11a to the other end on the circumferential surface of the column portion 11b, and is identical to the axial direction and the circumferential direction of the cage 10. Inclined in the direction.
Here, the inclination angles with respect to the axial direction of the fins 11d are substantially equal, and the width and thickness of the fins 11d gradually decrease from the end on the annular part 11a toward the end on the column part 11b. It has a wedge-like appearance.

上記したように、保持器単体１１同士は、円環部１１ａが背中合わせの状態で軸受１に組み込まれているため、そのフィン１１ｄの傾斜の向きは、保持器単体１１間で軸方向に対して逆向きとなっている。   As described above, since the cages 11 are incorporated in the bearing 1 with the annular portions 11a back to back, the inclination direction of the fins 11d is relative to the axial direction between the cages 11. The direction is reversed.

なお、この保持器単体１１は、合成樹脂を射出成形することにより、円環部１１ａと柱部１１ｂとフィン１１ｄとが一体に成形されている。   In addition, as for this holder | retainer single-piece | unit 11, the annular part 11a, the pillar part 11b, and the fin 11d are integrally shape | molded by injection molding synthetic resin.

この軸受１を、図３の白抜き矢印で示すように、各保持器単体１１のフィン１１ｄの柱部１１ｂ周面上の端部が、円環部１１ａ周面上の端部に対して先行する向きに回転させる。
すると、各フィン１１ｄは、その回転軌跡上の流体を保持器１０背面側に押し出し、その反作用として、各保持器単体１１にそのポケット１１ｃ側、すなわち、図中矢印で示す側への推進力が生じる。
こうして、推進力は離間する方向に働くため、各保持器単体１１は、図中鎖線で示すように、微小に動いて離間する。
そのため、保持器単体１１の背面同士のこすれあいが減じられ、保持器１０の摩耗が抑制される。 As shown by the white arrow in FIG. 3, the end of the bearing 1 on the circumferential surface of the pillar portion 11 b of the fin 11 d of each cage 11 is preceded by the end of the circumferential surface of the annular portion 11 a. Rotate in the direction you want.
Then, each fin 11d pushes the fluid on the rotation trajectory toward the back side of the cage 10, and as a reaction, each cage 11 has a propulsive force toward the pocket 11c, that is, the side indicated by the arrow in the figure. Arise.
In this way, since the propulsive force works in the direction of separating, the individual cages 11 are moved and separated slightly as shown by the chain line in the figure.
Therefore, the rubbing between the back surfaces of the cage unit 11 is reduced, and wear of the cage 10 is suppressed.

このとき、フィン１１ｄの軸方向に対する傾斜角は、ほぼ45度となっている。
また、フィン１１ｄは、保持器単体１１の周方向に相似形のものが等配されているため、保持器１０には、その周方向に均等に推進力が生じ、軸方向への推進がスムーズになされる。 At this time, the inclination angle of the fin 11d with respect to the axial direction is approximately 45 degrees.
In addition, since the fins 11d are equally arranged in the circumferential direction of the cage unit 11, the thrust force is uniformly generated in the circumferential direction of the cage 10, and the thrusting in the axial direction is smooth. To be made.

また、上記のように保持器単体１１が推進すると、そのポケット１１ｃに収納された円筒ころ４も保持器単体１１に押されて移動し、その端面が内輪２の外側の鍔部２ａに押し付けられるため、円筒ころ４のスキューが防止される。   Further, when the cage unit 11 is propelled as described above, the cylindrical roller 4 accommodated in the pocket 11c is also pushed and moved by the cage unit 11, and its end surface is pressed against the flange 2a on the outer side of the inner ring 2. Therefore, the skew of the cylindrical roller 4 is prevented.

なお、図１のように、保持器単体１１が離間する推進力が生じる、軸受１の回転方向は、内輪２の鍔部２ａ外面にプリント等された、矢印状の表示部２ｃに表示されている。
そのため、軸受１を工作機械等の主軸に嵌め合わせる際には、この表示部２ｃを見れば、推進力が生じる回転方向を間違える心配がない。 As shown in FIG. 1, the rotational direction of the bearing 1 in which the driving force for separating the cage 11 is generated is displayed on the arrow-shaped display portion 2c printed on the outer surface of the flange portion 2a of the inner ring 2. Yes.
For this reason, when the bearing 1 is fitted to the main shaft of a machine tool or the like, there is no fear that the rotational direction in which the propulsive force is generated is mistaken by looking at the display portion 2c.

また、上述した保持器単体１１の射出成形により、その一つ置きの柱部１１ｂ上には、脆弱なウェルドラインＷが形成されているが、図３のように、フィン１１ｄは、この上に配置されており、ウェルドラインＷの補強がなされている。
なお、ウェルドラインＷに限られず、フィン１１ｄが補強リブとして機能し、保持器単体１１が補強されていることは無論である。 In addition, a weak weld line W is formed on every other column portion 11b by the injection molding of the cage unit 11 described above, but the fin 11d is formed thereon as shown in FIG. The weld line W is reinforced.
Needless to say, the fin 11d functions as a reinforcing rib and the cage 11 is reinforced without being limited to the weld line W.

また、フィン１１ｄは、保持器単体１１の外周面から突出しているため、隣り合うフィン１１ｄの間には、入り込んだ潤滑剤が溜まりやすくなり、潤滑剤溜まりとして機能する。
ここで、各フィン１１ｄは、各柱部１１ｂ上に延び、円筒ころ４は、この柱部１１ｂ間に保持されているので、フィン１１ｄの間に溜まった潤滑剤は、円筒ころ４の転動面にスムーズに送り込まれることとなり、特に潤滑性が良好になっている。 Moreover, since the fin 11d protrudes from the outer peripheral surface of the cage unit 11, the lubricant that has entered easily accumulates between the adjacent fins 11d and functions as a lubricant reservoir.
Here, since each fin 11d extends on each column portion 11b and the cylindrical roller 4 is held between the column portions 11b, the lubricant accumulated between the fins 11d rolls on the cylindrical roller 4. It is smoothly fed to the surface, and the lubricity is particularly good.

ここで、フィン１１ｄの位置、大きさ、形状、数等は実施形態に限定されない。
例えば、フィン１１ｄを保持器単体１１の内外周面の両面や、内周面のみに形成してもよく、さらには、円環部１１ａの周面のみ、あるいは柱部１１ｂの周面のみに形成してもよい。
また、各フィン１１ｄで長さや厚みを違えてもよく、例えば、一部フィン１１ｄの厚みや長さを大きくすることで、当該フィン１１ｄが配置された部分を補強することができる。
同様に、フィン１１ｄを軸方向に複列をなすように配置して、当該部分を補強することもできる。
また、フィン１１ｄの形状は、推進力が発生しうる限りにおいて、湾曲させたり、流線型にしたりなどすることもできる。
なお、フィン１１ｄは、無論、単数でもよい。 Here, the position, size, shape, number, and the like of the fins 11d are not limited to the embodiment.
For example, the fins 11d may be formed on both the inner and outer peripheral surfaces of the cage unit 11 or only on the inner peripheral surface, and further, only on the peripheral surface of the annular portion 11a or only on the peripheral surface of the column portion 11b. May be.
Further, the length and thickness of each fin 11d may be different. For example, by increasing the thickness and length of the partial fin 11d, the portion where the fin 11d is disposed can be reinforced.
Similarly, the fins 11d can be arranged in a double row in the axial direction to reinforce the part.
Further, the shape of the fin 11d can be curved or streamlined as long as a propulsive force can be generated.
Of course, the fin 11d may be singular.

さらに、実施形態では、双方の保持器単体１１にフィン１１ｄを設けているが、一方の保持器単体１１のみにフィン１１ｄを設けてもよい。
この場合、フィン１１ｄを設けた一方の保持器単体１１のみに、離間する方向の推進力を発生させることで、保持器単体１１の円環部１１ａ同士のこすれあいを減じることができる。 Furthermore, in the embodiment, the fins 11d are provided in both of the cage units 11, but the fins 11d may be provided in only one of the cage units 11.
In this case, it is possible to reduce the rubbing between the annular portions 11a of the retainer unit 11 by generating a propulsive force in the direction of separating only the one retainer unit 11 provided with the fins 11d.

また、保持器１０の材質、製法は実施形態に限定されず、金属製としたり、円環部１１ａと柱部１１ｂのみを一体成形して、フィン１１ｄを後付けしたりしてもよい。   Further, the material and manufacturing method of the cage 10 are not limited to those of the embodiment, and may be made of metal, or only the annular portion 11a and the column portion 11b may be integrally formed, and the fins 11d may be retrofitted.

１ 軸受
２ 内輪
２ａ 鍔部
２ｂ 軌道面
２ｃ 表示部
３ 外輪
３ａ 軌道面
４ 円筒ころ
１０ 保持器
１１ 保持器単体
１１ａ 円環部
１１ｂ 柱部
１１ｃ ポケット
１１ｄ フィン
Ｗ ウェルドライン DESCRIPTION OF SYMBOLS 1 Bearing 2 Inner ring 2a Collar part 2b Raceway surface 2c Display part 3 Outer ring 3a Raceway surface 4 Cylindrical roller 10 Cage 11 Cage simple substance 11a Ring part 11b Pillar part 11c Pocket 11d Fin W Weld line

Claims (5)

円環部と、円環部から軸方向に延びる複数の柱部とを有し、柱部間のポケットにころを収納する２つのくし型の保持器単体から構成され、この保持器単体の円環部同士を互いに背中合わせにした状態で複列ころ軸受に組み込まれる保持器において、
少なくとも一方の保持器単体の外周面又は内周面に、複列ころ軸受の回転により、この保持器単体のポケット側に推進力を生じさせるフィンを設けたことを特徴とする複列ころ軸受の保持器。 Consists of two comb-shaped cages each having an annular part and a plurality of pillars extending in the axial direction from the annular part, and storing the rollers in pockets between the pillars. In a cage incorporated in a double row roller bearing with the ring parts back to back,
A double row roller bearing comprising a fin that generates a propulsive force on the pocket side of the cage by rotation of the double row roller bearing on the outer circumferential surface or the inner circumferential surface of at least one cage. Cage. 上記各保持器単体のフィンは軸方向および周方向に対して傾斜して直線状に延び、この直線状フィンの傾斜の向きを、軸受回転方向に対して、保持器単体の背面に近い側のフィン一端よりも、背面から遠い側のフィン他端が先行する向きとした請求項１に記載の複列ころ軸受の保持器。 The fins of the individual cages are linearly inclined with respect to the axial direction and the circumferential direction, and the direction of the inclination of the linear fins is closer to the back side of the cage alone with respect to the bearing rotation direction. The cage of a double row roller bearing according to claim 1, wherein the other end of the fin on the side farther from the back side is ahead of the one end of the fin. 上記各保持器単体の円環部と柱部とフィンとは合成樹脂により一体に射出成形され、そのウェルドライン上に上記フィンを配置した請求項１または２に記載の複列ころ軸受の保持器。   The cage of the double row roller bearing according to claim 1 or 2, wherein the annular portion, the column portion, and the fin of each of the cages are integrally injection-molded with a synthetic resin, and the fins are arranged on the weld line. . 上記フィンは、保持器単体の周方向または軸方向に複数並列する請求項１から３のいずれかに記載の複列ころ軸受の保持器。   The cage of a double row roller bearing according to any one of claims 1 to 3, wherein a plurality of the fins are juxtaposed in the circumferential direction or the axial direction of the cage alone. 請求項１から４のいずれかに記載の保持器を組み込んだ複列ころ軸受。   A double row roller bearing incorporating the cage according to any one of claims 1 to 4.
JP2010249688A 2010-11-08 2010-11-08 Double row roller bearing and cage for double row roller bearing Expired - Fee Related JP5567453B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110268175A (en) * 2017-02-09 2019-09-20 赛峰传动***公司 It is preferred for the autoregistration roller bearing with improved lubricant output of aircraft turbojet engine retarder

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CN104500576A (en) * 2014-12-23 2015-04-08 宁波慈兴轴承有限公司 Rolling bearing retainer with radiating fins

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JPH0410421Y2 (en) * 1985-05-15 1992-03-16
JPH0386215U (en) * 1989-12-21 1991-08-30
JP2001208075A (en) * 2000-01-20 2001-08-03 Nsk Ltd Double row rolling bearing
JP2005042849A (en) * 2003-07-24 2005-02-17 Nsk Ltd Resin retainer for double row roller bearing and double row roller bearing
JP2007198405A (en) * 2006-01-23 2007-08-09 Nsk Ltd Rolling bearing
DE102006042675A1 (en) * 2006-09-12 2008-03-27 Schaeffler Kg Swivel-joint roller bearing i.e. radial bearing, has tension unit provided between rollers for tensioning rollers against bearing surfaces at inner ring and outer ring, where tension unit is realized in form of edge rings
JP2008232323A (en) * 2007-03-22 2008-10-02 Ntn Corp Cylindrical roller bearing and its cage
JP5573420B2 (en) * 2010-06-29 2014-08-20 トヨタ自動車株式会社 Tapered roller bearing

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Publication number Priority date Publication date Assignee Title
CN110268175A (en) * 2017-02-09 2019-09-20 赛峰传动***公司 It is preferred for the autoregistration roller bearing with improved lubricant output of aircraft turbojet engine retarder

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