JP2008133894A - Ball bearing retainer - Google Patents

Ball bearing retainer Download PDF

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Publication number
JP2008133894A
JP2008133894A JP2006320185A JP2006320185A JP2008133894A JP 2008133894 A JP2008133894 A JP 2008133894A JP 2006320185 A JP2006320185 A JP 2006320185A JP 2006320185 A JP2006320185 A JP 2006320185A JP 2008133894 A JP2008133894 A JP 2008133894A
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JP
Japan
Prior art keywords
ball bearing
cage
retainer
pocket
corner
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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
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JP2006320185A
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Japanese (ja)
Inventor
Umemitsu Kobayashi
梅光 小林
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2006320185A priority Critical patent/JP2008133894A/en
Publication of JP2008133894A publication Critical patent/JP2008133894A/en
Pending legal-status Critical Current

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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
    • 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
    • F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
    • F16C33/3843—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
    • F16C33/3856—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window cages
    • 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
    • F16C33/3887—Details of individual pockets, e.g. shape or ball retaining means
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • 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
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
    • 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
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/39—General buildup of machine tools, e.g. spindles, slides, actuators

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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 provide a ball bearing retainer certainly preventing the inclination of the retainer and having no possibility of damage caused by a stress concentration or insufficient lubrication caused by the deterioration of a lubricant flow. <P>SOLUTION: A shape of a pocket 6 of the cylindrical retainer 5 is formed into such a square that two opposite sides 6a are parallel to the axial direction of the retainer and the rest of two opposite sides 6b are at right angles thereto, and a round-shape recessed portion 6c is formed at each corner of the square pocket 6. Thereby, the inclination of the retainer 5 is certainly prevented, and also the stress concentration at each corner of the pocket 6 is eased to eliminate a possibility of damage. In addition, a clearance for passing a lubricant to each corner is sufficiently ensured, and thereby a possibility of insufficient lubrication caused by the deterioration of the lubricant flow is prevented. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、深溝玉軸受やアンギュラ玉軸受等の玉軸受用保持器に関する。   The present invention relates to a ball bearing cage such as a deep groove ball bearing or an angular ball bearing.

深溝玉軸受やアンギュラ玉軸受等の玉軸受用保持器には、内外輪の軌道溝間に配列された複数のボールを、円筒状や円錐筒状の保持器の円周方向に間隔を開けて設けた円形のポケットに保持したものがある。通常、このような玉軸受用保持器の円形のポケットは、ボールの直径よりも少し大きく形成されている。   In ball bearing cages such as deep groove ball bearings and angular contact ball bearings, multiple balls arranged between the raceway grooves of the inner and outer rings are spaced apart in the circumferential direction of a cylindrical or conical cage. Some are held in a circular pocket. Usually, the circular pocket of such a ball bearing cage is formed to be slightly larger than the diameter of the ball.

このようにポケットの形状をボールの直径よりも大きい円形状とした保持器は、軸受の回転中にボールが転動方向で左右にずれると、ポケットの内周面の軸方向中心からずれた軸方向と傾斜した曲面に当接し、保持器に円周方向からずれた斜めの分力が作用する。このため、保持器が傾くように振動して騒音が発生したり、保持器が内輪や外輪の案内面で案内されるものでは、傾いた保持器が案内面と局部的に接触して焼き付いたりする問題があった。このような保持器の傾きは、軸受が高速で回転する工作機械の主軸を支持するアンギュラ玉軸受等で発生しやすい。   In this way, the cage whose pocket shape is circular larger than the diameter of the ball has an axis that deviates from the axial center of the inner peripheral surface of the pocket when the ball is displaced to the left or right in the rolling direction during rotation of the bearing. An inclined component force that is in contact with the curved surface inclined in the direction and deviated from the circumferential direction acts on the cage. For this reason, the cage vibrates as if it is tilted, and noise is generated, or when the cage is guided by the guide surface of the inner ring or outer ring, the tilted cage may be in contact with the guide surface and seize. There was a problem to do. Such inclination of the cage is likely to occur in an angular ball bearing or the like that supports the main shaft of a machine tool whose bearing rotates at a high speed.

このような問題に対して、ボールが転動方向で左右にずれても保持器に円周方向からずれた斜めの分力が作用しないように、保持器のポケットの形状を、直線または大きな曲率半径の弧で形成した各辺を直交させた四辺形とし、対向する２つの辺をボールの転動方向に対して直角に配した玉軸受用保持器が提案されている（例えば、特許文献１参照）。また、円形ポケットの間に、円形ポケットの径と同一の半円部とこの半円部に接続する軸方向の平行部をもった非円形ポケットを１個以上設けた玉軸受用保持器も提案されている（例えば、特許文献２参照）。   To avoid this problem, the cage pocket shape is straight or has a large curvature so that the diagonal component force that deviates from the circumferential direction does not act on the cage even if the ball is displaced to the left or right in the rolling direction. A ball bearing cage has been proposed in which each side formed by an arc of radius is a quadrangle in which the sides are orthogonal to each other and two opposing sides are arranged at right angles to the rolling direction of the ball (for example, Patent Document 1). reference). Also proposed is a ball bearing cage with one or more non-circular pockets between the circular pockets, each having a semicircular part that is the same diameter as the circular pocket and an axially parallel part connected to the semicircular part. (For example, refer to Patent Document 2).

実公昭３９−２２０５号公報Japanese Utility Model Publication No. 39-2205 特公昭５５−２７９７２号公報Japanese Patent Publication No.55-27972

特許文献１に記載された玉軸受用保持器のうち、ポケットの四辺形の各辺を直線で形成したものは、保持器の傾きの発生を確実に防止できるが、各辺が直角に交わるコーナ部に応力集中が発生しやすく、保持器が破損する恐れがある。コーナ部の応力集中を緩和するためには、コーナ部に隅肉部を形成すればよいが、応力集中を十分に緩和するために隅肉部を大きくすると、ボールとの隙間が少なくなって、保持器の内径側から外径側への潤滑剤の流れが悪くなり、特に、高速回転する軸受では潤滑不良が生じる問題がある。なお、ポケットの四辺形の各辺を弧で形成したものは、保持器の傾きの発生を確実に防止することはできない。   Among the ball bearing cages described in Patent Document 1, those in which each side of the quadrilateral of the pocket is formed with a straight line can surely prevent the cage from being tilted, but each corner intersects at a right angle. Stress concentration is likely to occur in the part, and the cage may be damaged. In order to alleviate the stress concentration in the corner portion, it is only necessary to form a fillet portion in the corner portion, but if the fillet portion is enlarged in order to sufficiently relax the stress concentration, the gap with the ball is reduced, The flow of the lubricant from the inner diameter side to the outer diameter side of the cage deteriorates, and there is a problem that poor lubrication occurs particularly in a bearing that rotates at a high speed. In addition, what formed each side of the quadrilateral of the pocket by an arc cannot reliably prevent the tilt of the cage.

また、特許文献２に記載された玉軸受用保持器は、非円形ポケットに収納されたボールからは円周方向からずれた斜めの分力を受けることはないが、円形ポケットに収納されたボールからは従来通りに斜めの分力を受けるので、保持器の傾きの発生を確実に防止することはできない。   The ball bearing retainer described in Patent Document 2 does not receive an oblique component force shifted from the circumferential direction from the ball stored in the non-circular pocket, but the ball stored in the circular pocket. Since it receives an oblique component force as usual, the occurrence of tilting of the cage cannot be reliably prevented.

そこで、本発明の課題は、保持器の傾きの発生を確実に防止でき、かつ、応力集中による破損の恐れや、潤滑剤の流れの悪化による潤滑不良の恐れもない玉軸受用保持器を提供することである。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a ball bearing retainer that can reliably prevent the tilt of the retainer, and that is free from the risk of breakage due to stress concentration and poor lubrication due to deterioration of the lubricant flow. It is to be.

上記の課題を解決するために、本発明は、玉軸受の内外輪の軌道溝間に配列された複数のボールを、円筒状または円錐筒状の保持器の円周方向に間隔を開けて設けたポケットに保持する玉軸受用保持器において、前記ポケットの形状を対向する２つの辺が前記保持器の軸方向と平行で、他の対向する２つの辺がこれらと直角な四角形とし、この四角形状としたポケットの各コーナ部にＲ形状のぬすみを設けた構成を採用した。   In order to solve the above problems, the present invention provides a plurality of balls arranged between the raceway grooves of the inner and outer rings of a ball bearing at intervals in the circumferential direction of a cylindrical or conical cage. In the ball bearing cage held in the pocket, the square shape of the pocket is parallel to the axial direction of the cage, and the other two opposing sides are squares perpendicular to the square. A configuration was adopted in which each corner of the shaped pocket was provided with an R-shaped relief.

すなわち、ポケットの形状を対向する２つの辺が保持器の軸方向と平行で、他の対向する２つの辺がこれらと直角な四角形とし、この四角形状としたポケットの各コーナ部にＲ形状のぬすみを設けることにより、保持器の傾きの発生を確実に防止できるようにするとともに、ポケットの各コーナ部での応力集中を緩和して破損の恐れをなくし、かつ、各コーナ部に潤滑剤を通す隙間を十分に確保して、潤滑剤の流れの悪化による潤滑不良の恐れもないようにした。   That is, the two sides facing the pocket shape are parallel to the axial direction of the cage, and the other two facing sides are squares perpendicular to them, and each corner portion of the square pocket has an R shape. By providing a relief, it is possible to reliably prevent the cage from tilting, reduce the stress concentration at each corner of the pocket, eliminate the risk of breakage, and add lubricant to each corner. Sufficient clearance was ensured so that there was no risk of poor lubrication due to deterioration of the lubricant flow.

前記保持器を樹脂で形成されたものとすることにより、ポケットコーナ部のＲ形状のぬすみを容易に設けることができる。   By forming the cage from resin, it is possible to easily provide an R-shaped relief at the pocket corner.

上述した各玉軸受用保持器は、工作機械の主軸を支持するアンギュラ玉軸受用のものに好適である。   Each of the ball bearing cages described above is suitable for an angular ball bearing that supports a main shaft of a machine tool.

本発明の玉軸受用保持器は、ポケットの形状を対向する２つの辺が保持器の軸方向と平行で、他の対向する２つの辺がこれらと直角な四角形とし、この四角形状としたポケットの各コーナ部にＲ形状のぬすみを設けたので、保持器の傾きの発生を確実に防止できるとともに、応力集中による破損の恐れや潤滑剤の流れの悪化による潤滑不良の恐れもないようにすることができる。   The ball bearing retainer of the present invention has a rectangular shape in which the two opposite sides are parallel to the axial direction of the cage and the other two opposite sides are perpendicular to them. Since the corners of each corner are provided with an R shape, it is possible to reliably prevent the cage from being tilted and to prevent the risk of damage due to stress concentration and the failure of lubrication due to the deterioration of the lubricant flow. be able to.

前記保持器を樹脂で形成されたものとすることにより、ポケットコーナ部のＲ形状のぬすみを容易に設けることができる。   By forming the cage from resin, it is possible to easily provide an R-shaped relief at the pocket corner.

以下、図面に基づき、本発明の実施形態を説明する。図１は、本発明に係る玉軸受用保持器１を用いた玉軸受を示す。この玉軸受は、内輪２と外輪３の軌道溝２ａ、３ａ間に、複数のボール４が保持器５で保持されたアンギュラ玉軸受１であり、内輪２の軌道溝２ａの両側に保持器５の案内面２ｂが設けられ、外輪３の軌道溝３ａの片側にカウンタ部３ｂが設けられている。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a ball bearing using a ball bearing cage 1 according to the present invention. This ball bearing is an angular ball bearing 1 in which a plurality of balls 4 are held by a cage 5 between raceway grooves 2 a and 3 a of an inner ring 2 and an outer ring 3, and cages 5 are provided on both sides of the raceway groove 2 a of the inner ring 2. The guide surface 2b is provided, and a counter portion 3b is provided on one side of the raceway groove 3a of the outer ring 3.

図２（ａ）、（ｂ）に示すように、前記保持器５は、樹脂で円筒状に形成され、その円周方向に間隔を開けて、ボール４を収納する四角形のポケット６が設けられている。このポケット６は、軸方向と平行に対向する２つの辺６ａと、これらと直角な２つの対向する辺６ｂとで形成されており、各コーナ部にＲ形状のぬすみ６ｃが設けられている。したがって、ボール４が転動方向で左右にずれても、円周方向からずれた斜めの分力で保持器５が傾くことはなく、かつ、各コーナ部への応力集中や、保持器５の内径側から外径側への潤滑剤循環の悪化が生じる恐れもない。   As shown in FIGS. 2A and 2B, the cage 5 is formed of a resin in a cylindrical shape, and is provided with a rectangular pocket 6 for accommodating the balls 4 at intervals in the circumferential direction. ing. The pocket 6 is formed by two sides 6a opposed in parallel to the axial direction, and two opposite sides 6b perpendicular to these, and R corners 6c are provided at each corner. Therefore, even if the ball 4 is shifted to the left or right in the rolling direction, the cage 5 is not tilted by an oblique component force deviated from the circumferential direction, and stress concentration on each corner portion, There is no risk of deterioration of the lubricant circulation from the inner diameter side to the outer diameter side.

図３は、上述したアンギュラ玉軸受１を組み込んだ工作機械の主軸１１を示す。この主軸１１は、フロント側が背面合わせされた２つのアンギュラ玉軸受１と複列ころ軸受１２で、リア側が複列ころ軸受１３で、それぞれハウジング１４に支持され、これらの支持部の間にモータ部１５が設けられている。   FIG. 3 shows a spindle 11 of a machine tool incorporating the above-described angular ball bearing 1. The main shaft 11 includes two angular ball bearings 1 and a double row roller bearing 12 whose front sides are back-to-back, and a rear side which is a double row roller bearing 13 and is supported by a housing 14. A motor unit is provided between these support portions. 15 is provided.

上述した実施形態では、保持器をアンギュラ玉軸受用で円筒状のものとしたが、保持器は円錐筒状のものとすることもでき、深溝玉軸受等の他の玉軸受用のものとすることもできる。   In the embodiment described above, the cage is a cylindrical one for angular ball bearings, but the cage can also be a conical cylinder, for other ball bearings such as deep groove ball bearings. You can also.

本発明に係る玉軸受用保持器を用いたアンギュラ玉軸受を示す縦断面図The longitudinal cross-sectional view which shows the angular ball bearing using the cage for ball bearings concerning this invention ａは図１の保持器を示す外観斜視図、ｂはａの展開平面図a is an external perspective view showing the cage of FIG. 1, and b is a developed plan view of a. 図１のアンギュラ玉軸受を組み込んだ工作機械の主軸を示す概略縦断面図1 is a schematic longitudinal sectional view showing a spindle of a machine tool incorporating the angular ball bearing of FIG.

符号の説明Explanation of symbols

１ アンギュラ玉軸受
２ 内輪
２ａ 軌道溝
２ｂ 案内面
３ 外輪
３ａ 軌道溝
３ｂ カウンタ部
４ ボール
５ 保持器
６ ポケット
６ａ、６ｂ 辺
６ｃ ぬすみ
１１ 主軸
１２、１３ 複列ころ軸受
１４ ハウジング
１５ モータ部 DESCRIPTION OF SYMBOLS 1 Angular contact ball bearing 2 Inner ring 2a Raceway groove 2b Guide surface 3 Outer ring 3a Raceway groove 3b Counter part 4 Ball 5 Cage 6 Pocket 6a, 6b Side 6c Slack 11 Main shaft 12, 13 Double row roller bearing 14 Housing 15 Motor part

Claims (3)

玉軸受の内外輪の軌道溝間に配列された複数のボールを、円筒状または円錐筒状の保持器の円周方向に間隔を開けて設けたポケットに保持する玉軸受用保持器において、前記ポケットの形状を対向する２つの辺が前記保持器の軸方向と平行で、他の対向する２つの辺がこれらと直角な四角形とし、この四角形状としたポケットの各コーナ部にＲ形状のぬすみを設けたことを特徴とする玉軸受用保持器。   In the ball bearing retainer for retaining a plurality of balls arranged between the raceway grooves of the inner and outer rings of the ball bearing in pockets provided at intervals in the circumferential direction of the cylindrical or conical cylindrical retainer, Two opposite sides of the pocket are parallel to the axial direction of the cage, and the other two opposite sides are squares perpendicular to them, and each corner portion of the square pocket has an R shape. A ball bearing retainer characterized by comprising: 前記保持器が樹脂で形成されたものである請求項１に記載の玉軸受用保持器。   The ball bearing retainer according to claim 1, wherein the retainer is made of resin. 前記保持器が、工作機械の主軸を支持するアンギュラ玉軸受用のものである請求項１または２に記載の玉軸受用保持器。   The ball bearing cage according to claim 1 or 2, wherein the cage is for an angular ball bearing that supports a spindle of a machine tool.
JP2006320185A 2006-11-28 2006-11-28 Ball bearing retainer Pending JP2008133894A (en)

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Cited By (7)

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JP2010121764A (en) * 2008-11-21 2010-06-03 Asahi Glass Co Ltd Separable angular contact ball bearing and combined angular contact ball bearing
DE102010023521A1 (en) * 2010-06-11 2011-12-15 Aktiebolaget Skf Cage for a rolling bearing and angular contact ball bearings
WO2013008586A1 (en) * 2011-07-13 2013-01-17 Ntn株式会社 Rolling bearing device
DE102015223255A1 (en) 2015-11-25 2017-06-01 Schaeffler Technologies AG & Co. KG A ball bearing retainer
CN107061529A (en) * 2017-05-24 2017-08-18 宁波纬尚汽车零部件有限公司 A kind of cage spherical shell structure and its technique processing method
US10113590B2 (en) * 2016-08-19 2018-10-30 Minebea Mitsumi Inc. Ball bearing unit for turbocharger
TWI678478B (en) * 2014-09-30 2019-12-01 日商Ｎｔｎ股份有限公司 Cage for ball bearing assembly

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JP2010121764A (en) * 2008-11-21 2010-06-03 Asahi Glass Co Ltd Separable angular contact ball bearing and combined angular contact ball bearing
DE102010023521A1 (en) * 2010-06-11 2011-12-15 Aktiebolaget Skf Cage for a rolling bearing and angular contact ball bearings
WO2013008586A1 (en) * 2011-07-13 2013-01-17 Ntn株式会社 Rolling bearing device
JP2013019511A (en) * 2011-07-13 2013-01-31 Ntn Corp Rolling bearing device
US9206848B2 (en) 2011-07-13 2015-12-08 Ntn Corporation Rolling bearing unit
RU2585125C2 (en) * 2011-07-13 2016-05-27 Нтн Корпорейшн Rolling bearing assembly
US10663001B2 (en) 2014-09-30 2020-05-26 Ntn Corporation Ball bearing cage
TWI678478B (en) * 2014-09-30 2019-12-01 日商Ｎｔｎ股份有限公司 Cage for ball bearing assembly
WO2017088862A3 (en) * 2015-11-25 2017-08-10 Schaeffler Technologies AG & Co. KG Ball bearing cage with pockets having an essentially square basic shape
CN108350942A (en) * 2015-11-25 2018-07-31 舍弗勒技术股份两合公司 Ball bearing cage with substantially square pockets
JP2019500552A (en) * 2015-11-25 2019-01-10 シェフラー テクノロジーズ アー・ゲー ウント コー． カー・ゲーＳｃｈａｅｆｆｌｅｒ Ｔｅｃｈｎｏｌｏｇｉｅｓ ＡＧ ＆ Ｃｏ． ＫＧ Ball bearing cage with a substantially square pocket
US10451112B2 (en) 2015-11-25 2019-10-22 Schaeffler Technologies AG & Co. KG Ball bearing cage
WO2017088862A2 (en) 2015-11-25 2017-06-01 Schaeffler Technologies AG & Co. KG Ball bearing cage
DE102015223255A1 (en) 2015-11-25 2017-06-01 Schaeffler Technologies AG & Co. KG A ball bearing retainer
US10113590B2 (en) * 2016-08-19 2018-10-30 Minebea Mitsumi Inc. Ball bearing unit for turbocharger
CN107061529A (en) * 2017-05-24 2017-08-18 宁波纬尚汽车零部件有限公司 A kind of cage spherical shell structure and its technique processing method
CN107061529B (en) * 2017-05-24 2023-08-08 宁波纬尚汽车零部件有限公司 Ball cage ball shell structure and technological treatment method thereof

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