JP2004332897A - Thrust ball bearing - Google Patents

Thrust ball bearing Download PDF

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Publication number
JP2004332897A
JP2004332897A JP2003132967A JP2003132967A JP2004332897A JP 2004332897 A JP2004332897 A JP 2004332897A JP 2003132967 A JP2003132967 A JP 2003132967A JP 2003132967 A JP2003132967 A JP 2003132967A JP 2004332897 A JP2004332897 A JP 2004332897A
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JP
Japan
Prior art keywords
ball
retainer
cage
pocket
diameter
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.)
Granted
Application number
JP2003132967A
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Japanese (ja)
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JP4311977B2 (en
Inventor
Michio Hori
径生 堀
Yasuyuki Tsuji
靖之 辻
Tsutomu Mizutani
力 水谷
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NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
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Publication date
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Priority to JP2003132967A priority Critical patent/JP4311977B2/en
Publication of JP2004332897A publication Critical patent/JP2004332897A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/10—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/42—Ball cages made from wire or sheet metal strips
    • F16C33/422—Ball cages made from wire or sheet metal strips made from sheet metal
    • F16C33/425—Ball cages made from wire or sheet metal strips made from sheet metal from a single part, e.g. ribbon cages with one corrugated annular part

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the occurrence of scratch on a ball by reducing the contact stress of a thrust ball bearing and inhibiting the run out of an oil membrane and the wear on a contact part of the ball to the retainer. <P>SOLUTION: The ball 3 is incorporated between one pair of raceway rings 1a, 1b and the ball 3 is inserted into each pocket 9 by forming a smaller pocket 9 that an opposed space in the retainer circumference direction is larger than the ball diameter of the ball 3 and an opposed space in the retainer diameter direction is smaller than the ball diameter of the ball 3 in an annular plate part 5 having a U-shaped bending part 8 of the retainer 4 retaining the ball 3. The clearance δ of an axial direction formed between the ball 3 and the retainer 4 is made to be below the thickness of the retainer 4 and the center of the ball 3 is always arranged into the edge at upper and lower part of the inner face 9b that opposes to the retainer circumference direction of the pocket 9 and the contact stress is reduced and the run out of oil membrane and the occurrence of wear are prevented at the contact part of the ball 3 to the inner circumference face of the pocket 9 and the forming of scratch on the ball 3 is prevented. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
この発明は、スラスト荷重を支持するスラスト玉軸受に関するものである。
【０００２】
【従来の技術】
この種のスラスト玉軸受として、非特許文献１に記載されたものが従来から知られている。図５はその非特許文献１に記載されたスラスト玉軸受を示す。このスラスト玉軸受は、一対の軌道輪２０、２１の対向面に形成された軌道溝２３間にボール２４と、そのボール２４を保持する保持器２５とを組込んでいる。
【０００３】
保持器２５は、環状板部２６の外周と内周とに周方向に向く外側リング部２７と内側リング部２８とを設け、そのリング部２７、２８を相反する方向に傾斜させて先端の対向間隔をボール２４の球径より幅狭としている。
【０００４】
また、環状板部２６の幅方向中央部に断面Ｕ字形の屈曲部２９を設け、その環状板部２６に上記屈曲部２９とその両側部を打抜く複数のポケット３０を保持器周方向に等間隔に形成し、各ポケット３０内にボール２４を収納している。
【０００５】
ここで、ポケット３０は、保持器周方向での対向間隔がボール２４の球径よりやや大きい寸法とされ、保持器径方向で対向する間隔がボール２４の球径より小さくされて、ボール２４をその上部がポケット３０から環状板部２６上に突出する状態でボール２４を保持するようになっている。
【０００６】
上記保持器２５においては、屈曲部２９がリブの役目をするため、強度的に強く、変形や破損が生じ難いという特徴を有している。
【０００７】
【非特許文献１】
Ｊ．ブレンドライン／Ｐ．エッシュマン／Ｌ．ハスバルゲン／Ｋ．ワイガンド著「ころがり軸受用ハンドブック」株式会社工業調査会発行所、１９９６年８月１日、Ｐ．３２−３３
【０００８】
【発明が解決しようとする課題】
ところで、非特許文献１に記載された図５に示すスラスト玉軸受においては、そのスラスト玉軸受の回転時、保持器２５は複数のボール２４の遅れ進みによってボール２４との間に形成された軸方向すきまに相当する量だけ上方に移動して、図６（Ｉ）に示すように、外側リング部２７および内側リング部２８の内面がボール２４に接触すると共に、図６（ＩＩ）に示すように、ポケット３０の保持器周方向で対向する一方の面３０ａの下側エッジ３０ｂがボール２４と接触する。このため接触応力が高く、その接触部において油膜切れや摩耗が生じ易い。また、ボール２４にすり疵が発生したり、摩耗粉が軌道面にかみ込んで圧痕を発生する等の不都合があった。
【０００９】
この発明の課題は、ボールの接触応力の低減を図り、ボールと保持器の接触部での油膜切れや摩耗を防止することができると共に、ボールにすり疵が発生するのを防止することができるようにしたスラスト玉軸受を提供することである。
【００１０】
【課題を解決するための手段】
上記の課題を解決するために、この発明においては、軌道溝を有する一対の軌道輪と、その軌道輪間に組込まれた複数のボールと、そのボールを保持する保持器とから成り、前記保持器が、幅方向中央部に断面Ｕ字形の屈曲部が形成された環状板部と、その環状板部の外周および内周に連設されて先端の間隔がボールの球径より幅狭に形成されたテーパ状の外側リング部および内側リング部とを有し、前記環状板部には屈曲部およびその屈曲部の両側部にわたって形成されると共に、保持器周方向での対向間隔がボールの球径より大きく、保持器径方向での対向間隔がボールの球径より小さい複数のポケットを周方向に間隔をおいて設けたスラスト玉軸受において、前記保持器がボールで支持される状態で保持器とボールの相互間に形成された軸方向すきまを保持器の厚み以下として、保持器が軸方向すきまの範囲で移動しても、ポケットの保持器周方向で対向する内面の上下のエッジ内にボールの中心が配置されるようにした構成を採用したのである。
【００１１】
上記のように構成すれば、スラスト玉軸受の回転時、ポケットの保持器周方向で対向する一方の内面にボールを接触させることができる。
【００１２】
このため、ボールの外周にポケットの下側エッジが当接する従来のスラスト玉軸受に比較して接触応力の低減を図ることができると共に、接触部での油膜切れや摩耗を防止することができる。また、ボールにすり疵が発生するのを防止することができる。
【００１３】
ここで、保持器を金属板のプレス成形品とすることによって製造コストの安い保持器を得ることができる。
【００１４】
【発明の実施の形態】
以下、この発明の実施の形態を図１乃至図４に基づいて説明する。図１に示すように、スラスト玉軸受は、一対の軌道輪１ａ、１ｂと、その一対の軌道輪１ａ、１ｂの対向面に形成された軌道溝２に沿って転動可能な複数のボール３と、そのボール３を保持する保持器４とから成っている。
【００１５】
図２および図３に示すように、保持器４は金属板のプレス成形品から成る。この保持器４は、環状板部５の外周と内周とに下方に向く外側リング部６と内側リング部７とを設けた構成とされている。
【００１６】
外側リング部６と内側リング部７は相反する方向に傾斜するテーパ状とされて先端の間隔がボール３の球径より幅狭とされている。
【００１７】
環状板部５の幅方向中央部には下面側に突出する断面Ｕ字形の屈曲部８が設けられている。環状板部５には屈曲部８およびその屈曲部８の両側部にわたる複数のポケット９が保持器周方向に等間隔に形成されている。
【００１８】
ポケット９は、保持器周方向での対向間隔がボール３の球径より僅かに大きく、保持器径方向での対向間隔がボール３の球径より小径とされている。ボール３は各ポケット９内に挿入され、その挿入状態でボール３は上部がポケット９の上部開口から環状板部５の上側に突出する状態で上方に抜け出るのが防止されると共に、外側リング部６と内側リング部７によって下方に抜け出るのが防止される。
【００１９】
図２（Ｉ）は、ポケット９の保持器径方向で対向する内面９ａの下側のエッジ１０がボール３に支持された状態を示し、その支持状態においてボール３と保持器４の相互間に軸方向すきまδが設けられている。この軸方向すきまδは、保持器４の厚みｔより小さくなっている。
【００２０】
また、エッジ１０がボール３に接触する保持器４の支持状態において、ポケット９の保持器周方向で対向する内面９ｂの上側のエッジ１１よりやや下側の位置にボール３の中心が位置し、ボール３と保持器４とが軸方向すきまδに相当する量だけ相対的に移動しても、上記内面９ｂの上下のエッジ１１、１２内にボール３の中心が配置されるようになっている。
【００２１】
いま、スラスト玉軸受が回転すると、複数のボール３の遅れ進みによって保持器４が軸方向すきまδの範囲内において上下方向に移動する。
【００２２】
このとき、軸方向すきまδは保持器４の厚みｔより以下とされているため、ポケット９の保持器周方向で対向する内面９ｂの上下のエッジ１１、１２内にボール３の中心が位置し、ボール３は図４（ＩＩ）に示すように、上記内面９ｂと接触する状態で自転しながら軌道溝２に沿って転動することになる。
【００２３】
このように、ボール３は内面９ｂと接触し乍ら回転するため、ボールがポケットのエッジと接触しながら回転する従来のスラスト玉軸受に比較して接触応力の低減を図ることができる。
【００２４】
また、ボール３と内面９ｂの接触部で油膜切れが生じたり摩耗したりするのを防止することができると共に、ボール３の表面にすり疵が発生するのを防止することができる。
【００２５】
【発明の効果】
以上のように、この発明においてはボールと保持器の相互間に形成される軸方向すきまを保持器の厚みより小さくして、ポケットの保持器周方向で対向する内面の上下のエッジ内にボールの中心が配置されるようにしたので、ボールと保持器の接触応力の低減を図ることができると共に、その接触部での油膜切れや摩耗を防止し、かつボールにすり疵が発生するのを防止することができる。
【図面の簡単な説明】
【図１】この発明に係るスラスト玉軸受の実施の形態を示す断面図
【図２】（Ｉ）は図１の一部を拡大して示す断面図、（ＩＩ）は（Ｉ）のイ−イ線に沿った断面図
【図３】図１に示す保持器の一部分を示す斜視図
【図４】（Ｉ）は図２（Ｉ）に示す保持器が上方に移動した状態の断面図、（ＩＩ）は（Ｉ）のロ−ロ線に沿った断面図
【図５】従来のスラスト玉軸受を示す断面図
【図６】（Ｉ）は従来のスラスト玉軸受の回転状態を示す断面図、（ＩＩ）は（Ｉ）のハ−ハ線に沿った断面図
【符号の説明】
１ａ、１ｂ 軌道輪
２ 軌道溝
３ ボール
４ 保持器
５ 環状板部
６ 外側リング部
７ 内側リング部
８ 屈曲部
９ｂ 内面
１１、１２ エッジ[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a thrust ball bearing that supports a thrust load.
[0002]
[Prior art]
As this type of thrust ball bearing, the one described in Non-Patent Document 1 is conventionally known. FIG. 5 shows a thrust ball bearing described in Non-Patent Document 1. This thrust ball bearing incorporates a ball 24 and a retainer 25 for holding the ball 24 between raceway grooves 23 formed on opposing surfaces of a pair of races 20, 21.
[0003]
The retainer 25 is provided with an outer ring portion 27 and an inner ring portion 28 which are circumferentially oriented on the outer periphery and the inner periphery of the annular plate portion 26, and the ring portions 27, 28 are inclined in opposite directions to oppose the tip. The interval is narrower than the ball diameter of the ball 24.
[0004]
A bent portion 29 having a U-shaped cross section is provided at the center of the annular plate portion 26 in the width direction, and the bent portion 29 and a plurality of pockets 30 punching both sides thereof are formed in the annular plate portion 26 in the circumferential direction of the retainer. The balls 24 are housed in each pocket 30 at intervals.
[0005]
Here, in the pocket 30, the opposing interval in the retainer circumferential direction is set to be slightly larger than the ball diameter of the ball 24, and the opposing interval in the retainer radial direction is smaller than the ball diameter of the ball 24. The ball 24 is held with its upper part protruding from the pocket 30 onto the annular plate portion 26.
[0006]
The retainer 25 is characterized in that since the bent portion 29 functions as a rib, it is strong in strength and is hardly deformed or damaged.
[0007]
[Non-patent document 1]
J. Blend line / P. Eshman / L. Hasvargen / K. "Handbook for Rolling Bearings" by Weigand, Published by the Industrial Research Institute, Inc., August 1, 1996, p. 32-33
[0008]
[Problems to be solved by the invention]
By the way, in the thrust ball bearing shown in FIG. 5 described in Non-Patent Document 1, when the thrust ball bearing rotates, the retainer 25 is configured to have a shaft formed between the plurality of balls 24 and the balls 24 by advancing. 6 (I), the inner surfaces of the outer ring portion 27 and the inner ring portion 28 come into contact with the ball 24, and as shown in FIG. 6 (II). Then, the lower edge 30b of one surface 30a of the pocket 30 which faces in the cage circumferential direction comes into contact with the ball 24. For this reason, the contact stress is high, and the oil film is easily broken or worn at the contact portion. In addition, there were inconveniences such as generation of scratches on the ball 24 and indentation of the abrasion powder on the raceway surface.
[0009]
An object of the present invention is to reduce the contact stress of the ball, prevent the oil film from being cut or worn at the contact portion between the ball and the cage, and prevent the ball from being scratched. An object of the present invention is to provide such a thrust ball bearing.
[0010]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention comprises a pair of races having raceway grooves, a plurality of balls incorporated between the races, and a retainer for retaining the balls. An annular plate portion having a U-shaped cross-section at the center in the width direction and an outer and inner periphery of the annular plate portion are formed so that the interval between the tips is narrower than the ball diameter of the ball. The annular plate has a bent portion and both side portions of the bent portion, and a facing ball in the circumferential direction of the retainer has a ball sphere. In a thrust ball bearing in which a plurality of pockets larger than the diameter and opposed in the retainer radial direction and smaller than the ball diameter of the ball are provided at circumferential intervals, the retainer is supported in a state where the retainer is supported by the ball. And formed between the balls Even if the cage moves within the range of the axial clearance with the axial clearance being equal to or less than the thickness of the cage, the center of the ball is positioned within the upper and lower edges of the inner surface of the pocket that opposes in the cage circumferential direction. That is why the configuration was adopted.
[0011]
According to the configuration described above, when the thrust ball bearing rotates, the ball can be brought into contact with one of the inner surfaces of the pocket that oppose each other in the circumferential direction of the cage.
[0012]
For this reason, the contact stress can be reduced as compared with the conventional thrust ball bearing in which the lower edge of the pocket abuts the outer periphery of the ball, and the oil film breakage and wear at the contact portion can be prevented. In addition, it is possible to prevent the occurrence of scratches on the ball.
[0013]
Here, a cage with low manufacturing cost can be obtained by using a metal plate press-molded product for the cage.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to FIGS. As shown in FIG. 1, the thrust ball bearing includes a pair of races 1a and 1b and a plurality of balls 3 that can roll along raceways grooves 2 formed on opposing surfaces of the pair of races 1a and 1b. And a retainer 4 for holding the ball 3.
[0015]
As shown in FIGS. 2 and 3, the retainer 4 is formed of a press-formed product of a metal plate. The retainer 4 has a configuration in which an outer ring portion 6 and an inner ring portion 7 are provided on the outer periphery and the inner periphery of the annular plate portion 5 so as to face downward.
[0016]
The outer ring portion 6 and the inner ring portion 7 are tapered so as to be inclined in opposite directions, and the interval between the tips is narrower than the ball diameter of the ball 3.
[0017]
At the center in the width direction of the annular plate portion 5, a bent portion 8 having a U-shaped cross section is provided which protrudes toward the lower surface side. The annular plate 5 has a bent portion 8 and a plurality of pockets 9 formed on both sides of the bent portion 8 at equal intervals in the circumferential direction of the retainer.
[0018]
The pocket 9 has a facing distance in the retainer circumferential direction slightly larger than the ball diameter of the ball 3, and a facing distance in the retainer radial direction is smaller than the ball diameter of the ball 3. The balls 3 are inserted into the respective pockets 9. In the inserted state, the balls 3 are prevented from coming out upward with the upper part projecting from the upper opening of the pocket 9 to the upper side of the annular plate part 5, and the outer ring part is provided. 6 and the inner ring portion 7 prevent it from slipping downward.
[0019]
FIG. 2 (I) shows a state in which the lower edge 10 of the inner surface 9a of the pocket 9 opposed in the retainer radial direction is supported by the ball 3, and in the supported state, between the ball 3 and the retainer 4. An axial clearance δ is provided. This axial clearance δ is smaller than the thickness t of the cage 4.
[0020]
Further, in a support state of the retainer 4 in which the edge 10 contacts the ball 3, the center of the ball 3 is located at a position slightly lower than the upper edge 11 of the inner surface 9b of the pocket 9 opposed in the retainer circumferential direction, Even if the ball 3 and the retainer 4 relatively move by an amount corresponding to the axial clearance δ, the center of the ball 3 is arranged in the upper and lower edges 11 and 12 of the inner surface 9b. .
[0021]
Now, when the thrust ball bearing rotates, the cage 4 moves up and down within the range of the axial clearance δ due to the advance of the plurality of balls 3 with a delay.
[0022]
At this time, since the axial clearance δ is smaller than the thickness t of the cage 4, the center of the ball 3 is located in the upper and lower edges 11 and 12 of the inner surface 9 b of the pocket 9 which oppose each other in the cage circumferential direction. As shown in FIG. 4 (II), the ball 3 rolls along the raceway groove 2 while rotating on the inner surface 9b.
[0023]
As described above, since the ball 3 rotates while being in contact with the inner surface 9b, the contact stress can be reduced as compared with a conventional thrust ball bearing in which the ball rotates while being in contact with the edge of the pocket.
[0024]
In addition, it is possible to prevent the oil film from being broken or worn at the contact portion between the ball 3 and the inner surface 9b, and to prevent the surface of the ball 3 from being scratched.
[0025]
【The invention's effect】
As described above, in the present invention, the axial clearance formed between the ball and the cage is made smaller than the thickness of the cage, and the ball is formed in the upper and lower edges of the inner surface of the pocket which oppose each other in the circumferential direction of the cage. The center of the ball is arranged so that the contact stress between the ball and the cage can be reduced, oil film breakage and wear at the contact part can be prevented, and the occurrence of scratches on the ball can be prevented. Can be prevented.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an embodiment of a thrust ball bearing according to the present invention; FIG. 2 (I) is a cross-sectional view showing an enlarged part of FIG. 1; FIG. 3 is a perspective view showing a part of the retainer shown in FIG. 1; FIG. 4 (I) is a sectional view showing a state where the retainer shown in FIG. (II) is a cross-sectional view taken along a rolling line of (I). [FIG. 5] A cross-sectional view showing a conventional thrust ball bearing. [FIG. 6] (I) is a cross-sectional view showing a rotating state of a conventional thrust ball bearing. , (II) are cross-sectional views along the line c-a of (I).
1a, 1b raceway ring 2 raceway groove 3 ball 4 retainer 5 annular plate part 6 outer ring part 7 inner ring part 8 bent part 9b inner surface 11, 12 edge

Claims (2)

軌道溝を有する一対の軌道輪と、その軌道輪間に組込まれた複数のボールと、そのボールを保持する保持器とから成り、前記保持器が、幅方向中央部に断面Ｕ字形の屈曲部が形成された環状板部と、その環状板部の外周および内周に連設されて先端の間隔がボールの球径より幅狭に形成されたテーパ状の外側リング部および内側リング部とを有し、前記環状板部には屈曲部およびその屈曲部の両側部にわたって形成されると共に、保持器周方向での対向間隔がボールの球径より大きく、保持器径方向での対向間隔がボールの球径より小さい複数のポケットを周方向に間隔をおいて設けたスラスト玉軸受において、前記保持器がボールで支持される状態で保持器とボールの相互間に形成された軸方向すきまを保持器の厚み以下として、保持器が軸方向すきまの範囲で移動しても、ポケットの保持器周方向で対向する内面の上下のエッジ内にボールの中心が配置されるようにしたことを特徴とするスラスト玉軸受。A pair of races having raceway grooves, a plurality of balls incorporated between the races, and a retainer for retaining the balls, wherein the retainer has a bent portion having a U-shaped cross section at the center in the width direction. Is formed, and a tapered outer ring portion and an inner ring portion which are connected to the outer periphery and the inner periphery of the annular plate portion and have a gap between the tips formed narrower than the ball diameter of the ball. The annular plate portion is formed over a bent portion and both side portions of the bent portion, and a facing distance in a cage circumferential direction is larger than a ball diameter of a ball, and a facing distance in a cage radial direction is a ball. In a thrust ball bearing provided with a plurality of pockets smaller than the ball diameter at circumferential intervals, an axial clearance formed between the retainer and the ball is retained in a state where the retainer is supported by the ball. When the cage is below the thickness of the container, It is moved in a range of direction gap, thrust ball bearing, characterized in that the center of the ball has to be placed in the upper and the lower edges of the inner surfaces opposed to each other in the cage peripheral direction of the pocket. 前記保持器を金属板のプレス成形品とした請求項１に記載のスラスト玉軸受。The thrust ball bearing according to claim 1, wherein the cage is a press-formed product of a metal plate.
JP2003132967A 2003-05-12 2003-05-12 Thrust ball bearing Expired - Lifetime JP4311977B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100689057B1 (en) 2005-08-26 2007-03-08 주식회사 덕신 Thrust ball bearing of hermetic compressor
CN100398851C (en) * 2003-05-29 2008-07-02 Ntn株式会社 Thrust ball bearing
US10900523B2 (en) * 2019-06-27 2021-01-26 Schaeffler Technologies AG & Co. KG Double butterfly cage for a ball bearing and method of fabricating a double butterfly cage for a ball bearing
DE102021105455A1 (en) 2021-03-08 2022-09-08 Schaeffler Technologies AG & Co. KG Cage for a thrust ball bearing and method of assembling a ball race with this cage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100398851C (en) * 2003-05-29 2008-07-02 Ntn株式会社 Thrust ball bearing
KR100689057B1 (en) 2005-08-26 2007-03-08 주식회사 덕신 Thrust ball bearing of hermetic compressor
US10900523B2 (en) * 2019-06-27 2021-01-26 Schaeffler Technologies AG & Co. KG Double butterfly cage for a ball bearing and method of fabricating a double butterfly cage for a ball bearing
DE102021105455A1 (en) 2021-03-08 2022-09-08 Schaeffler Technologies AG & Co. KG Cage for a thrust ball bearing and method of assembling a ball race with this cage

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