EP1062434A1 - Cage pour roulement a billes et roulement a billes comprenant cette cage - Google Patents

Cage pour roulement a billes et roulement a billes comprenant cette cage

Info

Publication number
EP1062434A1
EP1062434A1 EP99910876A EP99910876A EP1062434A1 EP 1062434 A1 EP1062434 A1 EP 1062434A1 EP 99910876 A EP99910876 A EP 99910876A EP 99910876 A EP99910876 A EP 99910876A EP 1062434 A1 EP1062434 A1 EP 1062434A1
Authority
EP
European Patent Office
Prior art keywords
cage
ring
prongs
shaped element
pocket
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.)
Withdrawn
Application number
EP99910876A
Other languages
German (de)
English (en)
Inventor
Yanninck Pierre Hubert Fierling
Bengt Erik Lennart Rydell
Lars-Erik Stacke
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SKF Engineering and Research Centre BV
Original Assignee
SKF Engineering and Research Centre BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SKF Engineering and Research Centre BV filed Critical SKF Engineering and Research Centre BV
Publication of EP1062434A1 publication Critical patent/EP1062434A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • F16C33/41—Ball cages comb-shaped
    • 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
    • F16C33/41—Ball cages comb-shaped
    • F16C33/412—Massive or moulded comb cages, e.g. snap ball cages
    • F16C33/414—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb 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
    • F16C33/41—Ball cages comb-shaped
    • F16C33/418—Details of individual pockets, e.g. shape or ball retaining means

Definitions

  • the invention is related to a cage for a ball bearing, comprising a ring-shaped element provided with prongs which extend with respect to the ring-shaped element, cage pockets being enclosed between adjacent pairs of prongs, and said pairs of prongs each defining an opening through which a ball may be accommodated in the cage pocket by snapping in in the axial direction with respect to the ring-shaped element
  • Such cage which is generally known, and the balls assembled by pressing them together, such that said balls all at the same time snap into the respective pockets
  • the pockets are shaped in such a way that the cage is fully supported by the balls, which means that no direct contact between the cage and the inner ring or outei ring of the bearing exists
  • the balls are held at predetermined intervals.
  • the cage is subjected to varying load Said loads are caused by the conditions to which the bearing as a whole is subjected, i.e.
  • any misalignment of the inner ring with respect to the outei ring of the bearing plays a role in this respect
  • Such misalignment imposes a non- symmet ⁇ cal loading pattern on the balls and pockets, which in combination with the backward and forward movements of the balls with respect to the cage lead to high contact forces
  • These forces lead to excessive wear of the cage material and earliei fatigue failure, as well as an instable running behaviour of the bearing as a whole In high speed running conditions, these phenomena are aggravated
  • the object of the invention is to provide a solution to this pioblem
  • This 2 object is achieved in that in the circumferential direction of the ring-shaped element, at least one cage pocket has an elongated shape.
  • the elongated shape of the cage pocket(s) leads to a reduction of the contact forces. Thereby, advantages are obtained concerning the running properties of the bearing, improved wear life etc.
  • said at least one cage pocket comprises two symmetrical cage pocket halves which each have a spherically shaped inner surface, the spacing of which cage pocket halves is larger than the sphere diameter of said inner surfaces.
  • the spherically shaped, symmetrical cage pocket halves enclose an intermediate cage pocket piece.
  • Other shapes are also possible, as long as a proper guidance of the ball in question is ensured.
  • a proper guidance back and forth in circumferential direction of the ball elements is obtained in case the intermediate cage pocket piece has an inner surface which is curved according to a torus the axis of which corresponds to the axis of the ring-shaped element.
  • the inner surface of the intermediate cage piece, and the inner surfaces of the adjoining cage pocket halves at their junction are identically curved in a plane through the axis of the ring-shaped element for providing a smooth transition between said surfaces.
  • the prongs each extend from an intermediate prong body, said intermediate prong bodies being situated between two adjacent cage pockets each.
  • the intermediate prong bodies constitute the separation between consecutive cage pockets, and provide the required holding stiffness of the prongs, in combination with the flexibility necessary for snapping in of the balls in the cage pockets.
  • Each intermediate prong body is connected to the roots of two adjoining prongs.
  • the cage pockets may be regularly spaced; alternatively, irregular spacings are also possible.
  • all cage pockets Preferably, in the circumferential direction of the ring-shaped element, all cage pockets have an elongated shape.
  • the invention is also related to a ball bearing, comprising an inner ring and an 3 outer ring which each comprise a raceway, and a ring-shaped element provided with prongs which extend with respect to the ring-shaped element, cage pockets being enclosed between adjacent pairs of prongs, and said pairs of prongs each defining an opening through which a ball element is accommodated in the cage pocket by snapping in in the axial direction with respect to the ring-shaped element, in such a way that said cage is supported by the ball elements.
  • At least one cage pocket in the circumferential direction of the ring-shaped element, has an elongated shape.
  • the cage is fully supported by the balls.
  • said cage is subjected to varying loads as a consequence of the engagement with the balls, nevertheless a favourable pattern of contact forces and a smooth running behaviour is obtained as a result of the particular elongated shape of the cage pockets.
  • Figure 1 shows a view in perspective of the cage according to the invention.
  • Figure 2 shows a developed top view of the cage according to figure 1.
  • Figure 3 shows a detail of a cage pocket on an enlarged scale.
  • the cage shown in figures 1 and 2 comprises a ring-shaped element 1, carrying prongs 2, 3 which extend with respect to said ring-shaped element 1.
  • the pairs of prongs 2, 3 each enclose a cage pocket 4, and define an opening 5 which provides access to the respective cage pocket 4.
  • balls 6 can be accommodated in the cage pockets 5.
  • a series of balls 6 and the cage are assembled by snapping in in the axial direction of the ring-shaped element.
  • the balls 6 enter the corresponding cage pocket 4 via the openings 5 defined between the pairs of prongs 2, 3.
  • the ring-shaped element 1 and the prongs 2 are deformed in this process, and once the balls 6 have been snapped in, they are held in the respective cage pockets 4 in a reliable way.
  • the shape of all cage pockets in the circumferential direction of the ring-shaped element 1 is somewhat elongated. Thereby, each ball 6 has some play, in the forward and backward direction, seen in the circumferential direction of the ring-shaped element.
  • not all cage pockets 4 need to have an elongated shape. However, at least one of said cage pockets must have such elongated shape.
  • the play thus obtained has a positive influence on the running behaviour and the loadings between the balls 6 and the opposing walls 7, 8 of each cage pocket.
  • the internal walls, in particular the parts 7, 8, of the cage pockets may be conformed somewhat to the ball shape of the ball 6.
  • the prongs 2, 3 of adjoining cage pockets 4 are accommodated on a common intermediate prong body 9.
  • These prong bodies 9 extend over a certain distance in the axial direction of the ring-shaped element 1.
  • the prongs 2, 3, in particular the roots 10 thereof, are connected to these prong bodies 9.
  • the face 12 of the prong bodies 9, onto which the roots 10 of the prongs 2, 3 are connected, is at a distance from the bottom 1 1 of the cage pockets 4.
  • the prongs 2, 3 are relatively short, but together with the rest of the cage provide sufficient flexibility for snapping in of the balls 6 in the corresponding cage pockets 4, while still maintaining an adequate holding capability.
  • each cage pocket 4 comprises two symmetrical and spherically shaped cage pocket halves 13, 14, which enclose an intermediate cage pocket piece 15.
  • the intermediate cage pocket piece 15 has an inner surface which is shaped according to a torus 19 which is indicated as well. Said inner surface smoothly merges into the spherically shaped inner surfaces of the cage pocket halves 13, 14, through (imaginary) junction lines 17, 18.
  • the spacing (or maximum mutual distance in the circumferential direction of the ring-shaped element 1) of the surfaces of the adjoining cage pocket halves 13, 14 is greater than the diameter of the sphere which defines the shape of said inner surfaces of the adjoining cage pocket halves 13, 14.
  • Said cage pocket piece 15 has an inner surface which is curved according to a torus, the axis of which corresponds to the axis of the ring-shaped element.
  • the balls 6 are reliably held between the prongs 2, 3 and the curved parts of the cage pockets 4.

Landscapes

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

Abstract

L'invention concerne une cage pour roulement à billes, la cage comprenant un élément (1) annulaire doté de branches (2, 3) s'étendant par rapport à l'élément annulaire, des logements (4) de cage étant définis entre des paires de branches (2, 3) et ces paires de branches définissant chacune une ouverture (5) dans laquelle on peut loger un élément de bille (6) dans le logement (4) de cage par pression dans la direction axiale par rapport à l'élément (1) annulaire. Dans la direction circonférentielle, au moins un logement (4) de cage présente une forme allongée.
EP99910876A 1998-03-20 1999-03-19 Cage pour roulement a billes et roulement a billes comprenant cette cage Withdrawn EP1062434A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NL1008649A NL1008649C2 (nl) 1998-03-20 1998-03-20 Kooi voor een kogellager.
NL1008649 1998-03-20
PCT/NL1999/000153 WO1999049228A1 (fr) 1998-03-20 1999-03-19 Cage pour roulement a billes et roulement a billes comprenant cette cage

Publications (1)

Publication Number Publication Date
EP1062434A1 true EP1062434A1 (fr) 2000-12-27

Family

ID=19766777

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99910876A Withdrawn EP1062434A1 (fr) 1998-03-20 1999-03-19 Cage pour roulement a billes et roulement a billes comprenant cette cage

Country Status (6)

Country Link
EP (1) EP1062434A1 (fr)
JP (1) JP2002507704A (fr)
KR (1) KR20010042054A (fr)
CN (1) CN1297516A (fr)
NL (1) NL1008649C2 (fr)
WO (1) WO1999049228A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19951387A1 (de) * 1999-10-26 2001-05-03 Schaeffler Waelzlager Ohg Kugellagerkäfig
JP4055938B2 (ja) * 2002-04-18 2008-03-05 ミネベア株式会社 ラジアルボールベアリングのリテーナ
JP2004150617A (ja) * 2002-11-01 2004-05-27 Minebea Co Ltd 軸受用保持器
CN100427783C (zh) * 2005-01-24 2008-10-22 上银科技股份有限公司 线轨滚珠连接带
CN101978181B (zh) * 2008-03-21 2014-04-09 Ntn株式会社 滚珠轴承用保持器和具有它的滚珠轴承及其制造方法
FR2996889B1 (fr) * 2012-10-12 2015-04-24 Skf Ab Cage pour roulement, notamment pour roulement de direction electrique de vehicule automobile
FR2998631B1 (fr) * 2012-11-27 2015-09-04 Skf Ab Cage pour roulement, notamment pour roulement de direction electrique de vehicule automobile
FR3001511B1 (fr) * 2013-01-25 2016-02-26 Skf Ab Cage pour roulement, notamment pour roulement de direction electrique de vehicule automobile
DE102013209288A1 (de) * 2013-05-21 2014-11-27 Schaeffler Technologies Gmbh & Co. Kg Wälzkörperlager mit Käfig
WO2015145794A1 (fr) * 2014-03-28 2015-10-01 日本精工株式会社 Roulement à billes à contact oblique
KR20180061678A (ko) 2016-11-30 2018-06-08 셰플러코리아(유) 볼베어링용 케이지 및 이를 구비한 볼베어링
CN110714986B (zh) * 2018-07-12 2022-12-23 斯凯孚公司 轴承保持架及其应用

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2146440A (en) * 1937-04-07 1939-02-07 Hoover Ball & Bearing Co Bearing retainer and method of making same
FR1198221A (fr) * 1957-06-11 1959-12-04 Skf Svenska Kullagerfab Ab Perfectionnements aux cages en matière plastique pour les corps de roulement des paliers à roulements
GB1348629A (en) * 1971-06-11 1974-03-20 Secr Defence Rolling element bearing
US4225199A (en) * 1978-09-15 1980-09-30 Earsley Melvin L Ball separator for ball bearing
JPS58180839A (ja) * 1982-04-16 1983-10-22 Natl Aerospace Lab 軸受用保持器
JP3744663B2 (ja) * 1996-12-27 2006-02-15 日本精工株式会社 ラジアル玉軸受用保持器及びラジアル玉軸受

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9949228A1 *

Also Published As

Publication number Publication date
NL1008649C2 (nl) 1999-09-21
JP2002507704A (ja) 2002-03-12
KR20010042054A (ko) 2001-05-25
CN1297516A (zh) 2001-05-30
WO1999049228A1 (fr) 1999-09-30

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