JP2010174970A - Thrust roller bearing - Google Patents

Thrust roller bearing Download PDF

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JP2010174970A
JP2010174970A JP2009017834A JP2009017834A JP2010174970A JP 2010174970 A JP2010174970 A JP 2010174970A JP 2009017834 A JP2009017834 A JP 2009017834A JP 2009017834 A JP2009017834 A JP 2009017834A JP 2010174970 A JP2010174970 A JP 2010174970A
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roller
outer diameter
portions
rollers
cage
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JP5239909B2 (en
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Yoshitaka Waseda
義孝 早稲田
Shinya Ochi
慎哉 越智
Tsutomu Watanabe
力 渡邉
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JTEKT Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a thrust roller bearing having improved durability by suppressing the wear of rollers. <P>SOLUTION: The thrust roller bearing includes the plurality of rollers 11, and a cage 20. The cage 20 includes both annular portions 21, 22 on the inner and outer diameter sides, and a plurality of columnar portions 30 for defining pockets 23. The columnar portions 30 each include a radially intermediate portion 31, both side portions 32, 33 on the radially inner and outer diameter sides, and inclined connection portions 34, 35. On the opposed faces of the radially intermediate portion 31 and both side portions 32, 33 on the inner and outer diameter sides opposed to each other across the pockets 23, roller come-off preventing portions 36, 37, 38 are formed to prevent the come-off of the rollers 11 from the pockets 23. A relationship A<B and A<C is established, where A is an opposition space size between the roller come-off preventing portions 36 opposed to each other at the radially intermediate portion 31, B is an opposition space size between the roller come-off preventing portions 37 opposed to each other at the side portion 32 on the inner diameter side, and C is an opposition space size between the roller come-off preventing portions 38 opposed to each other at the side portion 33 on the outer diameter side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明はスラストころ軸受に関する。   The present invention relates to a thrust roller bearing.

従来、例えば、空調用圧縮機、オートマチックトランスミッションのトルクコンバータ等に用いられるスラストころ軸受においては、圧縮機やトルクコンバータ等のハウジングと回転軸との間に組み付けられる。
この種のスラストころ軸受においては、複数個のころと、保持器とを備えている。
また、保持器は、径方向に所定間隔を隔てる内・外径側の両環状部と、これら両環状部を連結すると共に、ころを転動可能に保持するポケットを区画形成する複数の柱部とを備えている。
さらに、保持器の柱部は、径方向中間部と、径方向の内・外径側の両側部と、これら径方向中間部と内・外径側の両側部とをそれぞれ連結する傾斜連結部とを備えている。
そして、ポケットを隔てて対向する径方向中間部及び内・外径側の両側部の各対向面には、ポケット内のころの抜け止めをなすころ止め部が形成されている。
また、前記したような構造をもつスラストころ軸受には、例えば、特許文献１に開示されている。 2. Description of the Related Art Conventionally, for example, thrust roller bearings used for air conditioning compressors, automatic transmission torque converters, and the like are assembled between a compressor and a torque converter housing and a rotating shaft.
This type of thrust roller bearing includes a plurality of rollers and a cage.
In addition, the retainer has a plurality of pillar portions that divide and form both the inner and outer diameter side annular portions that are spaced apart from each other in the radial direction and the pockets that hold the rollers in a rollable manner. And.
Further, the retainer column part includes a radial intermediate part, both side parts on the inner and outer diameter sides in the radial direction, and an inclined connecting part that connects these intermediate part in the radial direction and both side parts on the inner and outer diameter sides. And.
Roller stoppers that prevent the rollers in the pocket from coming off are formed on the opposing surfaces of the radial intermediate portion and the inner and outer diameter sides facing each other across the pocket.
A thrust roller bearing having the above-described structure is disclosed in, for example, Patent Document 1.

特開２００４−２１１８２４号公報JP 2004-21824 A

ところで、前記したような構造をもつスラストころ軸受において、軸受回転時に、保持器の内径側と外径側との周速の差によってころに滑りが生じ、ころの転動面や軌道面の油膜が薄くなったり油膜切れを生じたりする場合がある。
また、軸受回転時に、保持器ところとの接触によってころの転動面の油膜がかき取られ、当該部分の油膜が薄くなったり油膜切れを生じたりする場合がある。
そして、ころの転動面の油膜が薄くなった部分や油膜切れを生じ部分に摩耗が発生することが想定される。 By the way, in the thrust roller bearing having the structure as described above, when the bearing rotates, the roller slips due to the difference in the peripheral speed between the inner diameter side and the outer diameter side of the cage, and the oil film on the roller rolling surface and the raceway surface. May become thin or the oil film may be cut.
Further, when the bearing rotates, the oil film on the rolling surface of the roller is scraped off due to contact with the cage, and the oil film in the portion may become thin or the oil film may be cut off.
And it is assumed that the part where the oil film of the rolling surface of the roller becomes thin or the part where the oil film is cut off causes wear.

この発明の目的は、前記問題点に鑑み、ころの摩耗を抑制して耐久性の向上を図ることができるスラストころ軸受を提供することである。   In view of the above problems, an object of the present invention is to provide a thrust roller bearing capable of suppressing roller wear and improving durability.

前記課題を解決するために、この発明の請求項１に係るスラストころ軸受は、複数個のころと、保持器とを備えたスラストころ軸受であって、
前記保持器は、径方向に所定間隔を隔てる内・外径側の両環状部と、これら両環状部を連結すると共に、前記ころを転動可能に保持するポケットを区画形成する複数の柱部とを備え、
前記柱部は、径方向中間部と、径方向の内・外径側の両側部と、これら径方向中間部と内・外径側の両側部とをそれぞれ連結する傾斜連結部とを備え、
前記ポケットを隔てて対向する前記径方向中間部及び前記内・外径側の両側部の各対向面には、前記ポケット内の前記ころの抜け止めをなすころ止め部が形成され、
前記径方向中間部で対向するころ止め部の対向間隔寸法をＡとし、前記内径側の側部で対向するころ止め部の対向間隔寸法をＢとし、前記外径側の側部で対向するころ止め部の対向間隔寸法をＣとしたときに、「Ａ＜Ｂ」及び「Ａ＜Ｃ」の関係となるように設定されていることを特徴とする。 In order to solve the above problems, a thrust roller bearing according to claim 1 of the present invention is a thrust roller bearing comprising a plurality of rollers and a cage,
The retainer has a plurality of pillar portions that divide and form both inner and outer diameter side annular portions that are spaced apart from each other in the radial direction and pockets that hold the rollers in a rollable manner. And
The column part includes a radial intermediate part, both side parts on the inner / outer diameter side in the radial direction, and an inclined connection part that connects these radial direction intermediate part and both side parts on the inner / outer diameter side,
Roller stoppers that prevent the rollers in the pockets from falling off are formed on the opposing surfaces of the radial intermediate portion and the inner and outer diameter sides facing each other across the pocket,
The opposing distance dimension of the roller stoppers facing each other in the radial intermediate part is A, the opposing distance dimension of the roller stopper parts opposing in the inner diameter side part is B, and the opposite rollers in the outer diameter side part. It is characterized in that the relationship between “A <B” and “A <C” is set when the opposing distance between the stoppers is C.

前記構成によると、軸受回転時において、保持器の柱部の径方向の内・外径側の両側部のころ止め部と、ころと軸方向端部との接触が抑制され、保持器の柱部の径方向中間部のころ止め部と、ころの軸方向中央部とが接触してころが転動する。この際、保持器の径方向中間部のころ止め部と、ころの軸方向中央部との接触部分においては、ころの滑りが生じ難く転がりとなる。
このため、保持器の柱部の径方向中間部のころ止め部と、ころの軸方向中央部との接触部分におけるころの転動面の油膜がかき取られたとしても、当該部分の転動面においては転がり接触となるため、摩耗を良好に抑制することができ、耐久性に優れる。
また、ころの転動面をその軸方向の中央部が最大径となるフルクラウニング形状に形成した場合、ころの軸方向の中央部の最大径となる部分では滑りが一層生じ難く転がりとなるため、ころの転動面の摩耗抑制に効果が大きい。 According to the above configuration, during rotation of the bearing, contact between the roller stoppers on both the inner and outer diameter sides of the cage pillar portion on the inner and outer diameter sides and the roller and the axial end portion is suppressed, and the cage pillar The roller stop portion at the intermediate portion in the radial direction of the roller portion and the axial central portion of the roller come into contact with each other and the roller rolls. At this time, at the contact portion between the roller stopper portion in the intermediate portion in the radial direction of the cage and the central portion in the axial direction of the roller, the roller hardly rolls and rolls.
For this reason, even if the oil film on the rolling surface of the roller at the contact portion between the roller stopper portion in the radial intermediate portion of the cage column and the axial central portion of the roller is scraped off, the rolling of the portion Since the surface is in rolling contact, the wear can be suppressed well and the durability is excellent.
In addition, when the rolling surface of the roller is formed into a full crowning shape in which the central portion in the axial direction has the maximum diameter, the portion that has the maximum diameter in the central portion in the axial direction of the roller is more unlikely to slip and rolls. Greatly effective in suppressing wear on the rolling surface of the roller.

請求項２に係るスラストころ軸受は、請求項１に記載のスラストころ軸受であって、
ころの転動面と柱部の径方向中間部のころ止め部との間隔寸法をＰとし、前記ころの転動面と前記柱部の傾斜連結部との間の間隔寸法をＱとしたときに、「Ｐ＜Ｑ」の関係となるように設定されていることを特徴とする。 The thrust roller bearing according to claim 2 is the thrust roller bearing according to claim 1,
When the distance between the roller rolling surface and the roller stopper in the radial intermediate portion of the column is P, and the distance between the roller rolling surface and the inclined connecting portion of the column is Q Further, it is characterized in that the relationship of “P <Q” is set.

前記構成によると、軸受回転時において、保持器の柱部の傾斜連結部と、ころとの接触が抑制され、保持器の柱部の径方向中間部のころ止め部と、ころの軸方向中央部とが接触してころが転動するため、保持器の柱部の傾斜連結部によってころの転動面の油膜がかき取られることがない。これによって、ころの摩耗を抑制して耐久性の向上を図ることができる。   According to the above configuration, during rotation of the bearing, contact between the inclined connecting portion of the cage column and the roller is suppressed, the roller stopper in the radial intermediate portion of the cage column, and the axial center of the roller Since the roller comes into contact with the roller and the roller rolls, the oil film on the rolling surface of the roller is not scraped off by the inclined connecting portion of the pillar portion of the cage. Thereby, wear of the roller can be suppressed and durability can be improved.

この発明の実施例１に係るスラストころ軸受を示す縦断面図である。It is a longitudinal cross-sectional view which shows the thrust roller bearing which concerns on Example 1 of this invention. 同じく保持器の一部を破断して示す斜視図である。It is a perspective view which fractures | ruptures and shows a part of cage similarly. 同じく保持器の縦断面図である。It is a longitudinal section of a cage similarly. 同じく保持器のポケットを示す平面図である。It is a top view which similarly shows the pocket of a holder | retainer. 同じく図４のＶ−Ｖ線に基づく保持器の断面図である。It is sectional drawing of the holder | retainer similarly based on the VV line | wire of FIG.

この発明を実施するための最良の形態について実施例にしたがって説明する。   The best mode for carrying out the present invention will be described in accordance with an embodiment.

この発明の実施例１を図１〜図５にしたがって説明する。
図１はこの発明の実施例１に係るスラストころ軸受を示す縦断面図である。図２は保持器の一部を破断して示す斜視図である。図３は保持器の縦断面図である。図４は保持器のポケットを示す平面図である。図５は図４のＶ−Ｖ線に基づく保持器の断面図である。 A first embodiment of the present invention will be described with reference to FIGS.
1 is a longitudinal sectional view showing a thrust roller bearing according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing a part of the cage broken away. FIG. 3 is a longitudinal sectional view of the cage. FIG. 4 is a plan view showing a pocket of the cage. FIG. 5 is a sectional view of the cage based on the line VV in FIG.

図１に示すように、空調用圧縮機、オートマチックトランスミッションのトルクコンバータ等に用いられるスラストころ軸受１０は、複数個のころ１１と、保持器２０とを備えている。
また、複数のころ１１は、これらころ１１の転動面１２の軸方向の中央部が最大径となり、両端に向かってしだいに小径となるフルクラウニング形状に形成されることが好ましい（図３参照）。 As shown in FIG. 1, a thrust roller bearing 10 used for an air conditioning compressor, a torque converter of an automatic transmission, and the like includes a plurality of rollers 11 and a cage 20.
Further, the plurality of rollers 11 are preferably formed in a full crowning shape in which the central portion in the axial direction of the rolling surface 12 of these rollers 11 has the maximum diameter and gradually decreases toward both ends (see FIG. 3). ).

図２と図３に示すように、保持器２０は、径方向に所定間隔を隔てる内・外径側の両環状部２１、２２と、これら両環状部２１、２２を連結すると共に、複数のころ１１を転動可能に保持するポケット２３を区画形成する複数の柱部３０とを備えている。
複数の柱部３０は、径方向中間部３１と、径方向の内・外径側の両側部３２、３３と、これら径方向中間部３１と内・外径側の両側部３２、３３とをそれぞれ連結する傾斜連結部３４、３５とを備えている。 As shown in FIGS. 2 and 3, the retainer 20 is configured to connect both the annular portions 21 and 22 on the inner and outer diameter sides spaced apart from each other in the radial direction by the annular portions 21 and 22 and a plurality of the annular portions 21 and 22. And a plurality of column portions 30 for defining and forming pockets 23 for holding the rollers 11 in a rollable manner.
The plurality of column portions 30 include a radial intermediate portion 31, both side portions 32, 33 on the inner and outer diameter sides in the radial direction, and these radial direction intermediate portion 31 and both side portions 32, 33 on the inner and outer diameter sides. Inclined connecting portions 34 and 35 are connected to each other.

図２と図３に示すように、保持器２０のポケット２３を隔てて対向する隣接する両柱部３０において、径方向中間部３１及び内・外径側の両側部３２、３３の各対向面には、ポケット２３内のころ１１の抜け止めをなすころ止め部３６、３７、３８がそれぞれ形成されている。
また、図４と図５に示すように、径方向中間部３１で対向するころ止め部３６の対向間隔寸法をＡとし、内径側の側部３２で対向するころ止め部３７の対向間隔寸法をＢとし、外径側の側部３３で対向するころ止め部３８の対向間隔寸法をＣとしたときに、「Ａ＜Ｂ」及び「Ａ＜Ｃ」の関係となるように設定されている。 As shown in FIGS. 2 and 3, in the adjacent column portions 30 facing each other across the pocket 23 of the cage 20, the opposing surfaces of the radial intermediate portion 31 and the both side portions 32 and 33 on the inner and outer diameter sides. Are formed with roller stoppers 36, 37, and 38 for preventing the rollers 11 in the pocket 23 from coming off.
Further, as shown in FIG. 4 and FIG. 5, the facing distance dimension of the roller stoppers 36 facing each other at the radial intermediate part 31 is A, and the facing distance dimension of the roller stoppers 37 facing each other at the inner side 32 is set. When B is set and C is set as the facing distance between the roller stoppers 38 facing each other on the side 33 on the outer diameter side, the relationship of “A <B” and “A <C” is set.

また、図５に示すように、ころ１１の転動面１２と柱部３０の径方向中間部３１のころ止め部３６との間隔寸法（ころ１１の転動方向の隙間寸法）をＰとし、ころ１１の転動面１２と柱部３０の傾斜連結部３４（又は３５）との間の間隔寸法（ころ１１の転動方向の隙間寸法）をＱとしたときに、「Ｐ＜Ｑ」の関係となるように設定されることが好ましい。   Further, as shown in FIG. 5, the interval dimension (gap dimension in the rolling direction of the roller 11) between the rolling surface 12 of the roller 11 and the roller stopper 36 of the radial intermediate part 31 of the column part 30 is P, When the interval dimension between the rolling surface 12 of the roller 11 and the inclined connecting portion 34 (or 35) of the column part 30 (gap dimension in the rolling direction of the roller 11) is Q, “P <Q” It is preferable to set the relationship.

この実施例１に係るスラストころ軸受は上述したように構成される。
したがって、軸受回転時において、保持器２０の柱部３０の内・外径側の両側部３２、３３のころ止め部３７、３８と、ころ１１の軸方向端部との接触が抑制され、保持器２０の柱部３０の径方向中間部３１のころ止め部３６と、ころ１１の転動面１２の軸方向中央部とが接触してころ１１が軌道面上を転動する。
この際、保持器２０の径方向中間部３１のころ止め部３６と、ころ１１の転動面１２の軸方向中央部との接触部分においては、ころ１１の滑りが生じ難く転がりとなる。
このため、保持器２０の柱部３０の径方向中間部３１のころ止め部３６と、ころ１１の転動面１２の軸方向中央部との接触部分において、ころ１１の転動面１２の油膜がかき取られたとしても、当該部分の転動面１２においては滑りがなく転がるため、摩耗を良好に抑制することができ、耐久性に優れる。 The thrust roller bearing according to the first embodiment is configured as described above.
Therefore, during the rotation of the bearing, the contact between the roller stoppers 37, 38 of the both side portions 32, 33 on the inner and outer diameter sides of the column portion 30 of the cage 20 and the axial end portion of the roller 11 is suppressed and retained. The roller stopper 36 of the radial intermediate portion 31 of the column portion 30 of the vessel 20 and the axial central portion of the rolling surface 12 of the roller 11 come into contact with each other, and the roller 11 rolls on the raceway surface.
At this time, at the contact portion between the roller stopper 36 of the radial intermediate portion 31 of the cage 20 and the axial central portion of the rolling surface 12 of the roller 11, the roller 11 hardly rolls and rolls.
For this reason, the oil film of the rolling surface 12 of the roller 11 at the contact portion between the roller stopper 36 of the radial intermediate portion 31 of the column portion 30 of the cage 20 and the axial central portion of the rolling surface 12 of the roller 11. Even if scraped off, the rolling surface 12 of the part rolls without slipping, so that wear can be suppressed well and the durability is excellent.

また、ころ１１の転動面１２をその軸方向の中央部が最大径となるフルクラウニング形状に形成した場合、ころ１１の軸方向の中央部の最大径となる部分では滑りが一層生じ難く転がりとなる。このため、ころ１１の転動面１２の摩耗抑制に効果が大きい。   In addition, when the rolling surface 12 of the roller 11 is formed in a full crowning shape in which the central portion in the axial direction has a maximum diameter, the roller 11 rolls with less slippage in the portion having the maximum diameter in the central portion in the axial direction. It becomes. For this reason, the effect is great in suppressing wear of the rolling surface 12 of the roller 11.

また、図５に示すように、ころ１１の転動面１２と柱部３０の径方向中間部３１のころ止め部３６との間隔寸法をＰとし、ころ１１の転動面１２と柱部３０の傾斜連結部３４、３５との間の間隔寸法をＱとしたときに、「Ｐ＜Ｑ」の関係となるように設定されるた場合には、軸受回転時において、保持器２０の柱部３０の傾斜連結部３４、３５と、ころ１１との接触が抑制される。
これによって、保持器２０の柱部３０の径方向中間部３１のころ止め部３６と、ころ１１の軸方向中央部とが接触してころ１１が転動する。このため、保持器２０の柱部３０の傾斜連結部３４、３５によってころ１１の転動面１２の油膜がかき取られることがない。この結果、ころ１１の摩耗を抑制して耐久性の向上を図ることができる。 Further, as shown in FIG. 5, the interval dimension between the rolling surface 12 of the roller 11 and the roller stopper 36 of the radial intermediate portion 31 of the column portion 30 is P, and the rolling surface 12 of the roller 11 and the column portion 30. When the distance between the inclined connecting portions 34 and 35 is set to be Q and the relationship of “P <Q” is set, the column portion of the cage 20 is rotated during bearing rotation. The contact between the 30 inclined connecting portions 34 and 35 and the roller 11 is suppressed.
As a result, the roller stopper 36 of the radial intermediate portion 31 of the column portion 30 of the cage 20 and the axial central portion of the roller 11 come into contact with each other, and the roller 11 rolls. For this reason, the oil film of the rolling surface 12 of the roller 11 is not scraped off by the inclined connecting portions 34 and 35 of the column portion 30 of the cage 20. As a result, wear of the roller 11 can be suppressed and durability can be improved.

なお、この発明は前記実施例１に限定するものではなく、この発明の要旨を逸脱しない範囲内において、種々なる形態で実施することもできる。   In addition, this invention is not limited to the said Example 1, In the range which does not deviate from the summary of this invention, it can also be implemented with a various form.

１０ スラストころ軸受
１１ ころ
２０ 保持器
２１ 内径側環状部
２２ 外径側環状部
２３ ポケット
３０ 柱部
３１ 径方向中間部
３２ 内径側の側部
３３ 外径側の側部
３４、３５ 傾斜連結部
３６、３７、３８ ころ止め部 DESCRIPTION OF SYMBOLS 10 Thrust roller bearing 11 Roller 20 Cage 21 Inner diameter side annular part 22 Outer diameter side annular part 23 Pocket 30 Column part 31 Radial direction intermediate part 32 Inner diameter side part 33 Outer diameter side part 34, 35 Inclined connection part 36 , 37, 38 Roller stopper

Claims (2)

複数個のころと、保持器とを備えたスラストころ軸受であって、
前記保持器は、径方向に所定間隔を隔てる内・外径側の両環状部と、これら両環状部を連結すると共に、前記ころを転動可能に保持するポケットを区画形成する複数の柱部とを備え、
前記柱部は、径方向中間部と、径方向の内・外径側の両側部と、これら径方向中間部と内・外径側の両側部とをそれぞれ連結する傾斜連結部とを備え、
前記ポケットを隔てて対向する前記径方向中間部及び前記内・外径側の両側部の各対向面には、前記ポケット内の前記ころの抜け止めをなすころ止め部が形成され、
前記径方向中間部で対向するころ止め部の対向間隔寸法をＡとし、前記内径側の側部で対向するころ止め部の対向間隔寸法をＢとし、前記外径側の側部で対向するころ止め部の対向間隔寸法をＣとしたときに、「Ａ＜Ｂ」及び「Ａ＜Ｃ」の関係となるように設定されていることを特徴とするスラストころ軸受。 A thrust roller bearing comprising a plurality of rollers and a cage,
The retainer has a plurality of pillar portions that divide and form both inner and outer diameter side annular portions that are spaced apart from each other in the radial direction and pockets that hold the rollers in a rollable manner. And
The column part includes a radial intermediate part, both side parts on the inner / outer diameter side in the radial direction, and an inclined connection part that connects these radial direction intermediate part and both side parts on the inner / outer diameter side,
Roller stoppers that prevent the rollers in the pockets from falling off are formed on the opposing surfaces of the radial intermediate portion and the inner and outer diameter sides facing each other across the pocket,
The opposing distance dimension of the roller stoppers facing each other in the radial intermediate part is A, the opposing distance dimension of the roller stopper parts opposing in the inner diameter side part is B, and the opposite rollers in the outer diameter side part. A thrust roller bearing, characterized in that a relationship of “A <B” and “A <C” is established when the opposing distance between the stoppers is C. 請求項１に記載のスラストころ軸受であって、
ころの転動面と柱部の径方向中間部のころ止め部との間隔寸法をＰとし、前記ころの転動面と前記柱部の傾斜連結部との間の間隔寸法をＱとしたときに、「Ｐ＜Ｑ」の関係となるように設定されていることを特徴とするスラストころ軸受。 The thrust roller bearing according to claim 1,
When the distance between the roller rolling surface and the roller stopper in the radial intermediate portion of the column is P, and the distance between the roller rolling surface and the inclined connecting portion of the column is Q The thrust roller bearing is characterized in that the relation of “P <Q” is established.
JP2009017834A 2009-01-29 2009-01-29 Thrust roller bearing Expired - Fee Related JP5239909B2 (en)

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4936461B1 (en) * 1969-03-15 1974-10-01
JPH11351245A (en) * 1998-06-05 1999-12-24 Ntn Corp Thrust needle roller bearing for swash plate type compressor
JP2006017244A (en) * 2004-07-02 2006-01-19 Ntn Corp Thrust roller bearing
JP2006200633A (en) * 2005-01-20 2006-08-03 Ntn Corp Thrust roller bearing
JP2006214533A (en) * 2005-02-04 2006-08-17 Nsk Ltd Thrust cylindrical roller bearing
JP2006275285A (en) * 2005-03-03 2006-10-12 Nsk Ltd Thrust cylindrical roller bearing
JP2007247827A (en) * 2006-03-17 2007-09-27 Jtekt Corp Thrust roller bearing
JP2008202697A (en) * 2007-02-20 2008-09-04 Ntn Corp Roller with retainer

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4936461B1 (en) * 1969-03-15 1974-10-01
JPH11351245A (en) * 1998-06-05 1999-12-24 Ntn Corp Thrust needle roller bearing for swash plate type compressor
JP2006017244A (en) * 2004-07-02 2006-01-19 Ntn Corp Thrust roller bearing
JP2006200633A (en) * 2005-01-20 2006-08-03 Ntn Corp Thrust roller bearing
JP2006214533A (en) * 2005-02-04 2006-08-17 Nsk Ltd Thrust cylindrical roller bearing
JP2006275285A (en) * 2005-03-03 2006-10-12 Nsk Ltd Thrust cylindrical roller bearing
JP2007247827A (en) * 2006-03-17 2007-09-27 Jtekt Corp Thrust roller bearing
JP2008202697A (en) * 2007-02-20 2008-09-04 Ntn Corp Roller with retainer

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