WO2011064133A1 - Roulement à rouleaux coniques avec une cage cylindrique - Google Patents

Roulement à rouleaux coniques avec une cage cylindrique Download PDF

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Publication number
WO2011064133A1
WO2011064133A1 PCT/EP2010/067729 EP2010067729W WO2011064133A1 WO 2011064133 A1 WO2011064133 A1 WO 2011064133A1 EP 2010067729 W EP2010067729 W EP 2010067729W WO 2011064133 A1 WO2011064133 A1 WO 2011064133A1
Authority
WO
WIPO (PCT)
Prior art keywords
cage
roller bearing
tapered roller
bearing ring
tapered
Prior art date
Application number
PCT/EP2010/067729
Other languages
German (de)
English (en)
Inventor
Erich Lunz
Rainer Messerschmidt
Holger Grieser
Armin Necker
Original Assignee
Schaeffler Technologies Gmbh & Co. Kg
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 Schaeffler Technologies Gmbh & Co. Kg filed Critical Schaeffler Technologies Gmbh & Co. Kg
Publication of WO2011064133A1 publication Critical patent/WO2011064133A1/fr

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
    • F16C33/46—Cages for rollers or needles
    • F16C33/4605—Details of interaction of cage and race, e.g. retention or centring
    • 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
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
    • F16C19/364—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • 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
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • F16C33/545—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part rolled from a band
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • 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
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned

Definitions

  • This invention relates to a tapered roller bearing having at least one tapered roller row disposed between an outer race and an inner race comprising a cage with pockets associated with the tapered rollers for receiving and guiding the tapered rollers.
  • Such tapered roller bearings are known in different embodiments, in particular of the tapered rollers receiving and leading cages. All known cages have in common that they have a substantially conical shape, which follows, for example, the envelope surface of the tapered roller row or is aligned with one of the raceways of the inner and outer bearing ring. They are for example made in one piece from a plastic material such as polyamide, which requires complex and expensive forms (DE 42 06 861 A1). Other cages are made of a sheet metal blank by stamping and deep drawing, which is also expensive and high manufacturing costs caused. For example, reference is made to DE 447 100 B and WO 2008/056562 A1.
  • cages for tapered roller bearings from flat metal strips, which are bent into a conical ring and connected together at their ends.
  • the bags are for example introduced by laser or by milling or other suitable operations.
  • the connection of the ends takes place for example by welding or by gluing or by means of other material, non-positive or positive connection techniques.
  • the order of the processing steps is arbitrary; For example, the pockets can be inserted on the flat metal strip or on the curved ring.
  • a conical ring is approximately sickle-shaped in its development, the sheet metal strip blank can not be unwound from a roll. Rather, it must be punched or cut out of a flat board, which is not very efficient because of a generally existing limitation in board size, for instance due to the capacity of the available processing machine, and because of the unavoidable waste.
  • the bending of a conical ring made of a sinuous metal strip is technically relatively difficult.
  • the object of the invention is to provide a cage for tapered roller bearings, which is simpler and less expensive to produce at full functionality, and which offers the possibility of integrating further functions.
  • the invention is based on the recognition that cages for tapered roller bearings do not necessarily have to have a conical shape, so that with a simplification of the shape and a simplification of the production should be achieved.
  • the invention is therefore based on a tapered roller bearing with at least one between an outer bearing ring and an inner bearing ring. ordered tapered roller row, comprising a cage with pockets formed thereon for receiving and guiding the tapered rollers. It is provided according to the invention that the cage has a substantially cylindrical shape with a cylinder axis lying in the bearing axis.
  • the cage according to the invention can be made, for example, from a pipe section or preferably from a strip which can be developed from a strip and bent into a ring, so that, for example, restrictions due to the possible board size etc. are no longer present ,
  • the pockets each have adjoining boundary surfaces on the end faces and on the lateral surface of the tapered rollers.
  • the tapered rollers relative to the cage only one degree of freedom, namely to rotate, but their mutual distance is kept exactly in the circumferential direction.
  • the peripheral side edges of the pockets on the lateral surfaces of the tapered rollers is achieved in that these side edges each have substantially adapted to the cutting lines of the cage with the lateral surface of the tapered rollers shape.
  • the shape of the side edges essentially corresponds in each case to sections of two hyperbolas.
  • the cage is provided at its axially front and / or rear edge with retaining means for axial fixation relative to the outer and / or inner bearing ring.
  • the holding means may have different shapes. According to one embodiment, radially inwardly directed holding means are provided on the larger end face of the tapered rollers associated rear edge of the cage, which can create ger ger of the associated rear end face of the inner. These secure the roller set on the inner ring and thus the entire bearing against falling apart in the unassembled state. During operation, these holding means do not touch the inner ring. Rather, a correspondingly sufficient game is provided to avoid unnecessary friction.
  • the outer ring may be provided on the smaller end face of the tapered rollers associated front edge of the cage radially outwardly directed retaining means, which can invest in the associated front end face of the outer bearing ring. In this way, the outer ring can be fixed to the overall bearing, so that the entire camp is held together in the uninstalled state.
  • This effect can according to another embodiment of the invention also be achieved in that at least one radially outwardly directed locking lug is provided at the rear edge of the cage in addition to the retaining means described further above, in a on the inner circumference of the outer bearing ring formed recess engages, as will also be explained in more detail with reference to an embodiment.
  • the previously described means of holding need not necessarily be formed by elements formed on the cage.
  • Ss are also separate clip elements made of plastic or sheet metal possible, which are attached to the cage, whereby machining operations can be saved on the cage.
  • the holding means are each formed by a radially inwardly or outwardly bent edge flange according to a preferred embodiment of the invention, which additionally gives the cage a certain strength and rigidity.
  • the holding means of the cage are each realized by distributed over the cage circumference, radially inwardly or outwardly directed projections, which are formed for example by embossing.
  • the tapered rollers are axially supported in the direction of their larger end faces by a formed on the inner bearing ring large retaining board and in the direction of their smaller faces by the associated boundary edges of the respective associated pockets of the cage.
  • a displacement of the tapered rollers in the direction of their smaller end faces in a known manner is prevented in that the receiving space formed between the bearing rings narrows in this direction, as need not be explained in more detail.
  • the cage is equipped according to one of the embodiments described above with a radially inwardly bent edge flange at the rear edge and a radially outwardly bent edge flange on the front edge, it is provided according to a further embodiment of the invention that the two edge flanges have the same radial height , and that the cage in a longitudinal section the geometry of a lying "Z" has such that the inwardly curved rear edge and the outwardly curved front edge of the cage have the same outer diameter. This ensures that the same neutral fiber and the same moment of resistance arise on both sides during the round bending of the thus prepared metal strip. In the development then both sides can be the same length, so that when round bending easily results in a cylindrical shape.
  • a favorable and therefore preferred design provides that the inner diameter of a radially inwardly bent edge flange or outer diameter of a radially outwardly bent edge flange in each case substantially corresponds to the outer diameter of an associated inner bearing ring or the inner diameter of an associated outer bearing ring, and in that Edge flanges locking lugs are formed, which engage in the assembly of the tapered roller bearing behind the respectively associated inner and outer bearing ring.
  • the tapered rollers are arranged radially inwardly and / or outwardly holding tabs or the like, which make it possible, at least at the side edges of the pockets of the cage to press the tapered rollers into their associated pockets and hold them in place.
  • the radial guidance of the cage can take place on the inner bearing ring or on the outer bearing ring, as will be explained with reference to exemplary embodiments.
  • the cage may also be equipped with means for bearing sealing.
  • FIG. 1 shows a conventional sheet metal blank for cutting out sickle-shaped metal strips for conical cage rings according to the prior art
  • FIG. 3 is a cylindrical cage according to FIG. 2 in perspective view
  • Fig. 4 is a view similar to FIG. 2 with another embodiment of the
  • FIG. 5 is a partial perspective sectional view of the variant of FIG. 4,
  • FIG. 6 shows a partial view of a cage ring with retaining means embossed thereon
  • FIG. 7 is a view similar to FIG. 2 with another embodiment of the cage
  • FIG. 8 is a view similar to FIG. 2 with yet another embodiment of the cage
  • FIG. 9 is a view similar to FIG. 4 with a radially guided on the inner ring cage
  • FIG. 10 is a view similar to FIG. 2 with a radially guided on the outer ring cage
  • 1 1 is a view similar to FIG. 7, wherein particular structural details are shown
  • FIG. 12 is a partial longitudinal section through a cage according to FIG. 1 1,
  • FIG. 13 is a partial perspective view of a tapered roller bearing with the
  • Fig. 14 is a partial perspective view of a tapered roller bearing with a special pocket geometry.
  • Figure 1 shows, as an example of a known manufacturing process, a conventional sheet metal blank 2 with the contours of crescent-shaped sheet metal strips 4 from which conical cage rings are bent. It can be seen that when cutting or punching the metal strip 4 relatively much waste produced, so that the material consumption is high. In addition, the size of the sheet metal blanks is generally limited by these further processing punching machines or the like.
  • FIG. 2 shows a partial longitudinal section through a tapered roller bearing according to the invention with an outer bearing ring 6 and an inner bearing ring 8, a tapered roller 10 arranged between them and a cage 12 holding and leading thereto.
  • the cage 12 has a substantially cylindrical shape a cylinder axis lying in the bearing axis 14th
  • the pockets 16 of the cage 12 each have both on the end faces and on the lateral surface of the tapered rollers fitting boundary edges, ie the tapered rollers 10 are held by the cage in the axial direction and in the circumferential direction.
  • the side edges 18, 20 of the pockets each have a substantially adapted to the line of intersection of the cage with the lateral surface of the tapered rollers shape.
  • this shape does not exactly correspond to the course of the two branches of a hyperbola, since the cage 12 with the tapered rollers 10 approximately forms a conic which runs parallel to no surface line.
  • Fig. 4 shows an embodiment in which the roller cage consisting of the cage 22 and the tapered rollers 24 is axially fixed relative to the inner bearing ring 26.
  • radially inwardly directed holding means 28 are formed on the cage 22 at its the larger end face of the tapered rollers 24 associated rear edge, by means of which the cage 22 is held on the inner bearing ring 26.
  • the holding means 28 are formed as a radially inwardly bent edge flange 30.
  • Fig. 5 shows for better understanding again a perspective partial sectional view of the arrangement according to FIG. 4, which need not be described again in detail.
  • Fig. 6 shows a partial view of a cage 38 in the axial direction, wherein the holding means are formed as distributed over the circumference of the cage embossments 40 which engage behind the inner bearing ring 26.
  • Fig. 7 shows a partial sectional view of a tapered roller bearing similar to FIG. 4, but also at the smaller end face of the tapered rollers 42 associated edge of the cage 44 holding means 46 are provided which are directed radially outwardly in this case and to the associated Can create end face 48 of the outer bearing ring 50.
  • These holding means 46 are formed in the embodiment of FIG. 7 as an edge flange 52. In this way, the outer bearing ring 50 is axially secured.
  • Fig. 8 shows another embodiment for securing the outer Lagerrin- ges 54.
  • At the larger end faces of the tapered rollers 56 associated rear edge of the cage 58 in addition to a radially inwardly bent edge flange 60 at least one radially outwardly directed locking lug 62 is provided engages in a formed on the inner circumference of the outer bearing ring 54 recess 64.
  • FIG. 9 shows an arrangement similar to Fig. 4, wherein the cage 66 is dimensioned so that it is guided radially on the inner bearing ring 68, in this case on the large board 70 formed thereon.
  • FIG. 10 shows an embodiment similar to FIG. 2, wherein the cage 72, which is equipped without holding means, is guided radially on the outer bearing ring 74. The tapered roller is guided axially by two radial ribs on the inner bearing ring.
  • Figures 1 1 and 12 show a particular embodiment of a bent from a sheet metal strip cage 78 with a radially inwardly bent rear edge flange 80 and a radially outwardly bent front edge flange 82.
  • the design and dimensions of the cage 78 are made such that the two edge flanges 80, 82 each have the same radial height a, and that the cage 78 has in a longitudinal section the profile of a lying "Z" such that the rear and front edges of the cage 78 have the same overall outer diameter b these Way results in the round bending of the metal strip to a cage on both sides of the same neutral fiber (diameter c) and the same moment of resistance, which is favorable for the bending process.
  • the actual inner diameter of the radially inwardly bent edge flange 80 substantially corresponds to the outer diameter g of the inner bearing ring 88, while the outer diameter of the outwardly directed edge flange 82 substantially corresponds to the inner diameter h of the outer bearing ring 90.
  • the edge flanges 80, 82 thus do not engage behind the associated bearing rings 88 and 90, respectively.
  • latching lugs 84 and 86 are respectively impressed, which engage behind the associated bearing rings 88, 90 and a snap connection form.
  • the radial dimensions of the locking lugs 84, 86 have the size designated f.
  • the cage 78 has the profile of a lying "Z" in the longitudinal section shown in Figures 11 and 12.
  • Fig. 13 shows an embodiment in which at the side edges 98 of the pockets 100 radially outwardly directed retaining tabs 102 and radially inwardly directed retaining tabs 104 are formed, which hold the tapered rollers 106 and thus allow a pre-assembly of the cage 108 and the tapered rollers 106 to a roller ring ,
  • Fig. 14 shows another embodiment in which the side edges 1 10 of the pockets 1 12 are contoured so that in the circumferential direction of the cage 1 14 protruding lugs 1 16 are formed, which hold the tapered rollers 1 18 in the cage 1 14.

Abstract

L'invention concerne un roulement à rouleaux coniques comprenant au moins une rangée de rouleaux coniques disposée entre une bague de roulement extérieure (6) et une bague de roulement intérieure (8), comprenant une cage (12) sur laquelle sont formées des poches destinées à accueillir et à guider les rouleaux coniques (10). Selon l'invention, la cage (12) possède une forme essentiellement cylindrique dans un axe de cylindre qui se trouve dans l'axe du roulement (14). D'autres fonctions sont de préférence attribuées à la cage, à savoir, par exemple, celles de maintenir la cohésion de l'ensemble du roulement à rouleaux coniques en tant qu'unité lorsqu'il n'est pas monté et/ou de former une garniture d'étanchéité du roulement.
PCT/EP2010/067729 2009-11-25 2010-11-18 Roulement à rouleaux coniques avec une cage cylindrique WO2011064133A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009055753A DE102009055753A1 (de) 2009-11-25 2009-11-25 Kegelrollenlager
DE102009055753.9 2009-11-25

Publications (1)

Publication Number Publication Date
WO2011064133A1 true WO2011064133A1 (fr) 2011-06-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2010/067729 WO2011064133A1 (fr) 2009-11-25 2010-11-18 Roulement à rouleaux coniques avec une cage cylindrique

Country Status (2)

Country Link
DE (1) DE102009055753A1 (fr)
WO (1) WO2011064133A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9033585B2 (en) 2013-05-07 2015-05-19 Baldor Electric Company Spherical roller bearing cage with inward flange turned radially outward

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010018112A1 (de) 2010-04-24 2011-10-27 Schaeffler Technologies Gmbh & Co. Kg Herstellung eines Schrägrollenlagerkäfigs

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1402071A (en) * 1920-03-05 1922-01-03 William F Huther Roller bearing
GB194201A (en) * 1922-05-10 1923-03-08 Bock Bearing Company Improvements in roller bearings
DE447100C (de) 1927-07-22 Hermann Barthel Kegelrollenkaefig
US2435839A (en) * 1945-12-24 1948-02-10 Timken Roller Bearing Co Taper roller bearing and cage
FR1143860A (fr) * 1956-02-27 1957-10-07 Timken Sa Franc Roulements à rouleaux coniques à cage en polyamide
US3940193A (en) * 1973-05-03 1976-02-24 General Motors Corporation Roller bearing separator
DE4206861A1 (de) 1991-03-08 1992-09-10 Skf Ind Spa Kegelrollenkaefig fuer kegelrollenlager
WO2008056562A1 (fr) 2006-11-09 2008-05-15 Ntn Corporation Roulement à rouleaux coniques

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE447100C (de) 1927-07-22 Hermann Barthel Kegelrollenkaefig
US1402071A (en) * 1920-03-05 1922-01-03 William F Huther Roller bearing
GB194201A (en) * 1922-05-10 1923-03-08 Bock Bearing Company Improvements in roller bearings
US2435839A (en) * 1945-12-24 1948-02-10 Timken Roller Bearing Co Taper roller bearing and cage
FR1143860A (fr) * 1956-02-27 1957-10-07 Timken Sa Franc Roulements à rouleaux coniques à cage en polyamide
US3940193A (en) * 1973-05-03 1976-02-24 General Motors Corporation Roller bearing separator
DE4206861A1 (de) 1991-03-08 1992-09-10 Skf Ind Spa Kegelrollenkaefig fuer kegelrollenlager
WO2008056562A1 (fr) 2006-11-09 2008-05-15 Ntn Corporation Roulement à rouleaux coniques

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9033585B2 (en) 2013-05-07 2015-05-19 Baldor Electric Company Spherical roller bearing cage with inward flange turned radially outward
US9062715B2 (en) 2013-05-07 2015-06-23 Abb Technology Ltd. Spherical roller bearing cage with cylindrical guidance contact surfaces
WO2014182569A3 (fr) * 2013-05-07 2015-10-29 Baldor Electric Company Cage de roulement à rouleaux à surfaces de contact de guidage cylindriques et bride interne retournée vers l'extérieur dans un sens radial

Also Published As

Publication number Publication date
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