US20150275969A1 - Spacer for rolling bearing having at least a reinforcing beam - Google Patents
Spacer for rolling bearing having at least a reinforcing beam Download PDFInfo
- Publication number
- US20150275969A1 US20150275969A1 US14/224,623 US201414224623A US2015275969A1 US 20150275969 A1 US20150275969 A1 US 20150275969A1 US 201414224623 A US201414224623 A US 201414224623A US 2015275969 A1 US2015275969 A1 US 2015275969A1
- Authority
- US
- United States
- Prior art keywords
- portions
- lateral portion
- spacer
- reinforcing
- reinforcing beam
- 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
Links
- 125000006850 spacer group Chemical group 0.000 title claims abstract description 116
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 86
- 238000005096 rolling process Methods 0.000 title claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003754 machining Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000906 Bronze Inorganic materials 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000010974 bronze Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000013585 weight reducing agent Substances 0.000 description 1
Images
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
- F16C33/51—Cages for rollers or needles formed of unconnected members
-
- 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
- F16C33/3818—Ball cages formed of unconnected segments
-
- 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
- F16C19/30—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 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
- F16C2300/00—Application independent of particular apparatuses
- F16C2300/10—Application independent of particular apparatuses related to size
- F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
-
- 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
Definitions
- the present invention relates to the field of rolling bearings, in particular rolling bearings having an inner ring, an outer ring, and one or more rows of contact rollers therebetween.
- the invention relates more particularly to the field of large-diameter rolling bearings, notably those used in a tunnel boring machine.
- a large-diameter rolling bearing comprises generally two concentric inner and outer rings, at least a row of contact rollers arranged between raceways provided on the rings, and a plurality of spacers disposed circumferentially between the rollers.
- Such rolling bearings are generally loaded, both axially and radially, often with a relatively strong load.
- French patent FR 2 222 898 relates to apertured spacers for rolling bearing which, by being assembled together, form a cage for the rollers.
- Each apertured spacer is of a substantially rectangular shape and is provided with a recess retaining the associated roller introduced by force through one aperture, the width of the aperture being less than the diameter of the roller.
- a convex boss is located at a lower corner of the spacer whereas a concave recess having a complementary shape is located at an opposite lower corner.
- Adjacent spacers are interengaged by virtue of the engagement of the boss of each spacer in the recess of the adjacent spacer.
- One aim of the present invention is to overcome these drawbacks.
- the spacer for rolling bearing comprising an inner ring, an outer ring and at least one row of contact rollers disposed between raceways provided on the rings, comprises opposite first and second portions facing one another and at least a first lateral portion extending transversally between the first and second portions and connected to the portions, the first and second portions and the first lateral portion delimiting at least partly a pocket laterally open on the side opposite to the lateral portion and configured to receive at least a contact roller.
- the first and second portions each comprise an inner contact surface with an end face of the roller.
- the spacer further comprises at least one reinforcing beam extending transversally between the first and second portions and connected to the portions.
- the at least one reinforcing beam extends transversally between the inner contact surfaces of the first and second portions and is connected to the surfaces.
- the at least one reinforcing beam may comprise an inner contact surface forming a bearing surface for an exterior rolling surface of the roller.
- the inner contact surface has in cross-section a profile in the shape of an arc of circle with a radius R defined by:
- the at least reinforcing beam is disposed at a corner of the first and second portions.
- the at least one reinforcing beam extends longitudinal edges of the first and second portions.
- the spacer comprises a first reinforcing beam disposed on the side opposite to the first lateral portion.
- the first reinforcing beam may extend between lateral edges of the first and second portions which are located on the side opposite to the first lateral portion.
- the spacer may further comprise a second reinforcing beam facing the first reinforcing beam, the reinforcing beams being disposed both on one side of the first and second portions.
- the second reinforcing beam is connected to the first lateral portion.
- the spacer may further comprise, on the side opposite to the first lateral portion, a retaining means extending from one of the first and second portions towards the other portion and having an inner surface forming a bearing surface for an exterior rolling surface of the roller.
- the retaining means comprises a hook.
- the retaining means comprises a second lateral portion facing the first lateral portion, the lateral portions delimiting together with the first and second portions the pocket.
- the first and second lateral portion may each comprise an inner contact surface forming a bearing surface for an exterior rolling surface of the roller.
- the first reinforcing beam is connected to the second lateral portion.
- a free edge of the second lateral portion may define with one of the first and second portions an aperture in order to open laterally the pocket on the side opposite to the first lateral portion.
- the spacer comprises at least first and second reinforcing beams extending transversally between the first and second portions and connected to the portions.
- the reinforcing beams are disposed both on one side of the first and second portions.
- the first reinforcing beam is disposed on the side opposite to the first lateral portion and the second reinforcing beam faces the first reinforcing beam.
- the mounting of the roller into the spacer may be made by a simple axial pushing movement.
- the associated roller In the mounted position, the associated roller is axially maintained in one direction.
- the mounting of the spacer and its associated roller into the rolling bearing is easier since the roller is carried by the beams on one side of the spacer.
- a rolling bearing comprises an inner ring, an outer ring, at least one row of contact rollers disposed between raceways provided on the rings, and a plurality of spacers as previously defined and disposed circumferentially between the rollers.
- the rolling bearing as previously defined may be particularly useful as a bearing for a tunnel boring machine.
- FIG. 1 is a half section of a rolling bearing according to a first example of the invention
- FIG. 2 is a perspective view of a spacer of the rolling bearing of FIG. 1 ,
- FIG. 3 is a side view of the spacer of FIG. 2 with its associated roller
- FIG. 4 is a front view of the spacer of FIGS. 2 and 3 with its roller
- FIG. 5 is a section on V-V of FIG. 4 .
- FIGS. 6 and 7 are perspective views of a spacer according to a second example of the invention.
- FIG. 8 is a front view of the spacer of FIGS. 6 and 7 with its associated roller, and
- FIG. 9 is a section on IX-IX of FIG. 8 .
- the rolling bearing as illustrated on the FIG. 1 is a large-diameter rolling bearing comprising an inner ring 1 and an outer ring 2 between which is housed one row of contact rollers 3 .
- the rolling bearing also comprises a plurality of spacers 4 disposed circumferentially between the rollers 3 to maintain their circumferential spacing. As will be described later, the spacers 4 each exhibit a good stiffness and are adapted to avoid high deformations during and after manufacturing.
- the inner and outer rings 1 , 2 are concentric and extend axially along the bearing rotation axis (not shown) of the rolling bearing.
- the rings 1 , 2 are of the solid type.
- a “solid ring” is to be understood as a ring obtained by machining with removal of material (by machining, grinding) from metal tube stock, bar stock, rough forgings and/or rolled blanks.
- the rollers 3 are identical with one another and each comprise an exterior rolling surface 3 a and opposite end transverse faces 3 b, 3 c delimiting axially the rolling surface.
- the rolling surface 3 a of each roller has a cylindrical profile.
- the rolling surfaces may have a spherical profile or a logarithmic profile.
- the angle between the rotation axis 3 d of each roller and the bearing axis is equal to 90°.
- the rotation axis 3 d of each roller extends radially.
- the inner ring 1 has a bore 1 a of cylindrical shape designed to be fixed to a chassis or to a structure of machine (not shown) and delimited by opposite radial lateral surfaces 1 b, 1 c.
- the inner ring 1 also comprises a stepped exterior cylindrical surface 1 d onto which an annular radial raceway 5 is formed.
- the raceway 5 has in cross-section a straight internal profile in contact with the rolling surfaces 3 a of the rollers 3 .
- the raceway 5 is formed by the radial surface provided between a first axial surface 6 of small-diameter and a second axial surface 7 of large-diameter of the stepped exterior cylindrical surface 1 d.
- the axial surface 6 forms an annular guiding surface which may be in radial contact with the spacers 4 .
- the axial guiding surface 6 is straight, disposed perpendicular to the raceway 5 and connected to the edge of small-diameter of the raceway by an annular concave fillet.
- the guiding surface 6 extends axially from the edge and is connected to the radial surface 1 c of the inner ring.
- the guiding surface 6 and the raceway 5 of the inner ring delimit an annular groove.
- the outer ring 2 comprises an outer cylindrical surface 2 a delimited by opposite radial lateral surfaces 2 b, 2 c.
- the outer ring 2 also comprises a stepped annular bore 2 d of cylindrical shape into which an annular radial raceway 8 is formed.
- the raceway 8 has in cross-section a straight internal profile in contact with the rolling surfaces 3 a of the rollers 3 .
- the raceway 5 of the inner ring and the raceway 8 of the outer ring axially face each other and are parallel.
- the raceway 8 is formed by the radial surface provided between a first axial surface 9 of small-diameter and a second axial surface 10 of large-diameter of the stepped bore 2 d.
- the axial surface 10 forms an annular guiding surface which may be in radial contact with the spacers 4 .
- the guiding surface 10 of the outer ring and the guiding surface 6 of the inner ring radially face each other and are parallel.
- the guiding surface 10 is straight, disposed perpendicular to the raceway 8 and connected to the edge of large-diameter of the raceway by an annular concave fillet.
- the guiding surface 10 extends axially from the edge and is connected to the radial surface 2 b of the outer ring.
- the guiding surface 10 and the raceway 8 of the outer ring delimit an annular groove.
- the raceway 5 and the guiding surface 6 of the inner ring define together with the raceway 8 and the guiding surface 10 of the outer ring an annular space inside which the rollers 3 and the spacers 4 are disposed.
- Each roller 3 arranged between the raceways 5 , 8 is maintained by the associated spacer 4 which may bear against the guiding surfaces 6 , 10 and the raceways 5 , 8 .
- the spacers 4 are identical with one another and each placed between two consecutive rollers 3 .
- Each spacer 4 is made in one part by molding a polymer material such as polyamide.
- the spacers 4 may be made from metal or bronze.
- each spacer 4 comprises two parallel inner and outer portions 11 , 12 adapted to come into contact with the facing guiding surfaces and the raceways of the inner and outer rings, and a lateral portion 13 extending transversally between the opposite portions 11 , 12 and adapted to be located circumferentially between two adjacent rollers 3 .
- the lateral portion 13 is connected to a lateral edge of the inner portion 11 and to the opposite facing lateral edge of the outer portion 12 .
- the inner and outer portions 11 , 12 forming first and second portions and the lateral portion 13 each have a rectangular shape with similar length and thickness.
- the width of the portions 11 , 12 and 13 is slightly smaller than the radius of the roller 3 .
- the raceways 5 , 8 and the guiding surface 6 , 10 of the inner and outer rings each form a flank having a direct contact surface with the inner and outer parts 11 , 12 of each spacer to have a slight relative sliding between each spacer 4 and the rings 1 , 2 .
- slight axial clearances are foreseen between each spacer and the raceways 5 , 8 of the rings and slight radial clearances are foreseen between each spacer and the guiding surface 6 , 10 .
- the inner and outer portions 11 , 12 and the lateral portion 13 of each spacer have in cross-section the overall shape of a C and delimit a pocket 14 for receiving one roller 3 .
- the pocket 14 is laterally open on the side opposite to the lateral portion 13 between the inner and outer portions 11 , 12 .
- the pocket 14 In the mounted position of the spacer 4 into the rolling bearing, the pocket 14 is delimited in the circumferential direction by the lateral portion 13 and is delimited in the radial direction by the inner and outer portions 11 , 12 .
- the pocket 14 of one spacer 4 is circumferentially open towards the adjacent spacer 4 .
- each spacer 4 is open both axially in the two directions and circumferentially in one direction.
- the pocket 14 is open on three sides.
- the inner and outer portions 11 , 12 extend radially
- the lateral portion 13 extends axially between the portions and the pocket 14 is radially open toward the outside.
- an opening or aperture is delimited axially by the free lateral edges of the inner and outer portions 11 , 12 and extends axially between these portions in order to open laterally the pocket 14 .
- the inner and outer portions 11 , 12 of each spacer have inner planar contact surfaces 11 a, 12 a facing each other and forming bearing surfaces for the end faces 3 b, 3 c of the associated roller.
- the gap between the planar contact surfaces 11 a, 12 a is substantially equal to the length of the roller 3 .
- the lateral portion 13 comprises an inner planar contact surface 13 a forming a bearing surface for the rolling surface 3 a of the associated roller.
- each spacer also comprises a planar outer surface 11 b opposite to the inner surface 11 a and two spaced guiding ribs (not referenced) provided on the outer surface.
- the guiding ribs protrude outwards relative to the outer surface 11 b and extend transversally on the outer surface from one of the longitudinal edges of the inner portion 11 to the other edge.
- the opposite longitudinal edges delimit the inner and outer surfaces 11 a, 11 b.
- the outer surface 11 b faces the guiding surface 6 of the inner ring while remaining distant from the latter, and the guiding ribs may come into contact with the guiding surface. Since the inner and outer portions 11 , 12 of each spacer are similar in the illustrated example, only one of them is described here in detail.
- each spacer comprises a planar outer surface 13 b opposite to the inner contact surface 13 a and two spaced guiding ribs (not referenced) provided on the outer surface.
- the guiding ribs protrude outwards relative to the outer surface 13 b and extend transversally on the outer surface from one of the longitudinal edge of the lateral portion 13 to the other edge.
- the opposite longitudinal edges delimit the outer surface 13 b.
- the spacer 4 further comprises a hook 15 which slightly protrudes inwards toward the inner portion 11 from the free edge of the outer portion 12 .
- the hook 15 is disposed on the outer portion 12 on the side opposite to the lateral portion 13 .
- the hook 15 is centered on the free edge of the outer portion 12 and remains distant from the longitudinal edges of the outer portion.
- the hook 15 comprises an inner planar contact surface forming a bearing surface for the rolling surface 3 a of the associated roller.
- the hook 15 is adapted to interfere with the roller 3 in order to avoid an escape from the open pocket 14 .
- the hook 15 forms a circumferential retaining means for the roller 3 .
- the spacer 4 further comprises first and second reinforcing beams 16 , 17 extending transversally between the inner and outer portions 11 , 12 .
- the reinforcing beams 16 , 17 extend transversally between the planar contact surfaces 11 a, 12 a of the inner and outer portions and are connected to the surfaces.
- the reinforcing beams 16 , 17 are disposed both on one side of the portions 11 , 12 .
- the first reinforcing beam 16 is disposed on the side opposite to the lateral portion 13 .
- the reinforcing beam 16 extends transversally between the free facing lateral edges of the inner and outer portions 11 , 12 which are located on the side opposite to the lateral portion 13 .
- the reinforcing beam 16 is connected to the lateral edges.
- the reinforcing beam 16 also extends transversally between the facing longitudinal edges of the inner and outer portions 11 , 12 and is connected to the edges.
- the reinforcing beam 16 extends both the free lateral edges of the inner and outer portions 11 , 12 and the longitudinal edges of the portions.
- the reinforcing beam 16 is disposed at a corner of the planar contact surfaces 11 a, 12 a of the inner and outer portions.
- the reinforcing beam 16 has a concave inner surface 16 a directed inward towards the pocket 14 and forming a bearing surface for the rolling surface 3 a of the roller.
- the second reinforcing beam 17 faces the first reinforcing beam 16 and is connected to the lateral portion 13 .
- the reinforcing beam 17 protrudes from the planar contact surface 13 a towards the first reinforcing beam 16 .
- the reinforcing beam 17 extends transversally between the facing longitudinal edges of the inner and outer portions 11 , 12 and is connected to the edges.
- the reinforcing beam 17 is disposed at a corner of the planar contact surfaces 11 a, 12 a of the inner and outer portions.
- the reinforcing beam 17 has a concave inner surface 17 a directed inward towards the pocket 14 and forming a bearing surface for the rolling surface 3 a of the roller.
- the inner surface 17 a extends the planar contact surface 13 a of the lateral portion 13 .
- Each of the inner contact surfaces 16 a, 17 a of the reinforcing beams has in cross-section a profile in the shape of an arc of circle with a radius R defined by 0.5 ⁇ D ⁇ R ⁇ 0.57 ⁇ D with D corresponding to the diameter of the roller, R and D being expressed in mm.
- the reinforcing beams 16 , 17 extend from the contact surfaces 11 a, 12 a of the inner and outer portions and do not protrude outwards with regard to these portions.
- the reinforcing beams are spaced apart one form another along the facing longitudinal edges of the inner and outer portions 11 , 12 and delimit an opening or aperture into which the roller 3 protrudes.
- the reinforcing beams 16 , 17 and the inner and outer portions 11 , 12 form a rectangular frame inside which extends the rolling surface 3 a of the roller.
- the use of the reinforcing beams 16 , 17 makes it possible to increase the mechanical strength of the spacer 4 .
- the stiffness of the spacer 4 is also increased by interposing, between the facing inner and outer portions 11 and 12 , rigidifying beams 16 , 17 . In the mounted position of the spacer 4 into the rolling bearing, the stiffness of the spacer is increased in the radial direction.
- the deformations of the inner and outer portions are limited.
- the reinforcement beams 16 , 17 limit the bending of one of the inner and outer portions 11 , 12 relative to the other.
- the spacer is free to shrink or bend on itself and the inner and outer portions 11 , 12 may be deformed inwards one relative to the other. This phenomenon can be problematic in the use of such a spacer later on because it can be impossible to mount the associated roller or the spacer can squeeze the roller during operation.
- the spacer 4 comprising the reinforcing beams 16 and 17
- the mounting of the the spacer and its associated roller 3 is easier since the roller is carried by the beams on one side of the spacer.
- the inner and outer portions 11 , 12 , the lateral portion 13 and the hook 15 , and the reinforcing beams 16 , 17 maintain the roller.
- the inner and outer portions 11 , 12 maintain radially the roller 3
- the lateral portion 13 and the hook 15 circumferentially maintain the roller 3 .
- the reinforcing beams 16 , 17 axially maintain the roller 3 in one direction.
- the spacer 4 is adapted to maintain a roller 3 having an increased length, for example equal to twice the length of the roller illustrated in the first example.
- a pair of two superposed rollers may be maintained by the spacer 4 .
- the two associated rollers are mounted axially in contact to one another with regard to their common rotation axis.
- the spacer 4 further comprises a second lateral portion 18 extending transversally from the outer portion 12 towards the inner portion 11 and facing the first lateral portion 13 .
- the first and second lateral portions 13 , 18 are parallel to one another.
- the second lateral portion 18 extends from the edge of the outer portion 12 located on the side opposite to the first lateral portion 13 .
- the lateral portion 18 extends towards the inner portion 11 while remaining distant from the latter.
- the inner and outer portions 11 , 12 and the lateral portions 13 , 18 each have a rectangular shape with similar thickness.
- the width of the inner and outer portions 11 , 12 and the lateral portions 13 , 18 is slightly smaller than the radius of the roller 3 .
- An opening or aperture 19 is defined between the second lateral portion 18 and the inner portion 11 .
- the pocket 14 is laterally open on the side opposite to the first lateral portion 13 between the inner portion 11 and the second lateral portion 18 .
- the pocket 14 of one spacer 4 is circumferentially open towards the adjacent spacer 4 with the aperture 19 .
- the pocket 14 of each spacer 4 is open both axially in the two directions and circumferentially in one direction.
- the pocket 14 is open on three sides.
- the inner and outer portions 11 , 12 extend radially, the first and second lateral portions 13 , 18 and the reinforcing beams 16 , 17 extend axially between the portions, and the pocket 14 is radially open toward the outside.
- the aperture 19 is delimited axially by the inner portion 11 and the lateral portion 18 .
- a free end of the lateral portion 18 defines with the free edge of the inner portion 11 the aperture 19 to open laterally the pocket 14 on the side opposite to the first lateral portion 13 .
- the free edge of the second lateral portion 18 remains distant from the inner portion 11 to delimit the aperture 19 .
- the second lateral portion 18 of the spacer comprises an inner planar contact surface 18 a facing the contact surface 13 a of the lateral portion 13 and forming a bearing surface for the rolling surface 3 a of the roller.
- the lateral portion 18 may have a length greater than the length of the upper roller in order to extend beyond the zone of contact between the upper roller and the lower roller. Accordingly, the inner contact surface 18 a also forms a bearing surface for the rolling surface of the lower roller.
- the first reinforcing beam 16 comprises an extension 20 which protrudes from the longitudinal edge of the beam located on the side opposite the first lateral portion 13 and which is connected to the second lateral portion 18 .
- the extension 20 of the reinforcing beam has a length equal to the one of the lateral portion 18 and is connected to the planar contact surface 12 a of the outer portion.
- the extension 20 extends transversally between the free edge of the lateral portion 18 and the longitudinal edge of the outer portion 12 .
- the extension 20 faces the first reinforcing beam 16 .
- the extension 20 has a concave inner surface 20 a forming a bearing surface for the rolling surface 3 a of the roller which extends the concave inner surface 16 a and which is connected to the planar contact surface 18 a of the lateral portion 18 .
- each spacer 4 is lightened by the provision of a pocket 14 defined by three or four portions or lugs and open in the circumferential direction towards the outside on the side opposite to the lateral portion 13 .
- a weight reduction for each spacer 4 is thus obtained.
- the reinforcing beams 16 , 17 extending between the inner and outer portions 11 and 12 , the mechanical strength and the stiffness of the spacer 4 are increased.
- the deformations of the portions of the spacer are also reduced during and after the manufacturing and during use.
- each spacer comprises two reinforcing struts or beams provided between the inner and outer portions 11 , 12 .
- the rolling bearing is adapted to accommodate axial loads.
- the inner ring and/or the outer ring may comprise gearing teeth on their outer periphery, so as to be connected to driving gears for instance connected to the output shaft of a motor.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
- This application claims priority from European Patent Application No. EP13160802 filed Mar. 25, 2013.
- The present invention relates to the field of rolling bearings, in particular rolling bearings having an inner ring, an outer ring, and one or more rows of contact rollers therebetween. The invention relates more particularly to the field of large-diameter rolling bearings, notably those used in a tunnel boring machine.
- A large-diameter rolling bearing comprises generally two concentric inner and outer rings, at least a row of contact rollers arranged between raceways provided on the rings, and a plurality of spacers disposed circumferentially between the rollers. Such rolling bearings are generally loaded, both axially and radially, often with a relatively strong load.
-
French patent FR 2 222 898 relates to apertured spacers for rolling bearing which, by being assembled together, form a cage for the rollers. Each apertured spacer is of a substantially rectangular shape and is provided with a recess retaining the associated roller introduced by force through one aperture, the width of the aperture being less than the diameter of the roller. A convex boss is located at a lower corner of the spacer whereas a concave recess having a complementary shape is located at an opposite lower corner. Adjacent spacers are interengaged by virtue of the engagement of the boss of each spacer in the recess of the adjacent spacer. - With such spacers, the number of contact rollers which can be introduced between the rings of the rolling bearing is strongly limited. This leads to a low load bearing capacity as well as a limited service life.
- One aim of the present invention is to overcome these drawbacks.
- It is a particular object of the present invention to provide a spacer adapted to increase the load bearing capacity of the associated rolling bearing.
- It is a particular object of the present invention to provide a spacer which is simple to manufacture, economic and having a good reliability.
- It is a further object of the present invention to provide a spacer having a good stiffness while guaranteeing low deformations during and after manufacturing.
- In one embodiment, the spacer for rolling bearing comprising an inner ring, an outer ring and at least one row of contact rollers disposed between raceways provided on the rings, comprises opposite first and second portions facing one another and at least a first lateral portion extending transversally between the first and second portions and connected to the portions, the first and second portions and the first lateral portion delimiting at least partly a pocket laterally open on the side opposite to the lateral portion and configured to receive at least a contact roller. The first and second portions each comprise an inner contact surface with an end face of the roller. The spacer further comprises at least one reinforcing beam extending transversally between the first and second portions and connected to the portions.
- In one preferred embodiment, the at least one reinforcing beam extends transversally between the inner contact surfaces of the first and second portions and is connected to the surfaces.
- Advantageously, the at least one reinforcing beam may comprise an inner contact surface forming a bearing surface for an exterior rolling surface of the roller. In one embodiment, the inner contact surface has in cross-section a profile in the shape of an arc of circle with a radius R defined by:
-
0.5×D≦R≦0.57×D, - with D corresponding to the diameter of the roller.
- In one embodiment, the at least reinforcing beam is disposed at a corner of the first and second portions.
- Preferably, the at least one reinforcing beam extends longitudinal edges of the first and second portions.
- In one embodiment, the spacer comprises a first reinforcing beam disposed on the side opposite to the first lateral portion. The first reinforcing beam may extend between lateral edges of the first and second portions which are located on the side opposite to the first lateral portion.
- The spacer may further comprise a second reinforcing beam facing the first reinforcing beam, the reinforcing beams being disposed both on one side of the first and second portions. In one embodiment, the second reinforcing beam is connected to the first lateral portion.
- The spacer may further comprise, on the side opposite to the first lateral portion, a retaining means extending from one of the first and second portions towards the other portion and having an inner surface forming a bearing surface for an exterior rolling surface of the roller.
- In one embodiment, the retaining means comprises a hook.
- In another embodiment, the retaining means comprises a second lateral portion facing the first lateral portion, the lateral portions delimiting together with the first and second portions the pocket. The first and second lateral portion may each comprise an inner contact surface forming a bearing surface for an exterior rolling surface of the roller.
- Advantageously, the first reinforcing beam is connected to the second lateral portion. A free edge of the second lateral portion may define with one of the first and second portions an aperture in order to open laterally the pocket on the side opposite to the first lateral portion.
- In one embodiment, the spacer comprises at least first and second reinforcing beams extending transversally between the first and second portions and connected to the portions. The reinforcing beams are disposed both on one side of the first and second portions. The first reinforcing beam is disposed on the side opposite to the first lateral portion and the second reinforcing beam faces the first reinforcing beam.
- With such an arrangement, the mounting of the roller into the spacer may be made by a simple axial pushing movement. In the mounted position, the associated roller is axially maintained in one direction. Besides, the mounting of the spacer and its associated roller into the rolling bearing is easier since the roller is carried by the beams on one side of the spacer.
- In another aspect of the invention, a rolling bearing comprises an inner ring, an outer ring, at least one row of contact rollers disposed between raceways provided on the rings, and a plurality of spacers as previously defined and disposed circumferentially between the rollers.
- The rolling bearing as previously defined may be particularly useful as a bearing for a tunnel boring machine.
- The present invention and its advantages will be better understood by studying the detailed description of specific embodiments given by way of non-limiting examples and illustrated by the appended drawings on which:
-
FIG. 1 is a half section of a rolling bearing according to a first example of the invention, -
FIG. 2 is a perspective view of a spacer of the rolling bearing ofFIG. 1 , -
FIG. 3 is a side view of the spacer ofFIG. 2 with its associated roller, -
FIG. 4 is a front view of the spacer ofFIGS. 2 and 3 with its roller, -
FIG. 5 is a section on V-V ofFIG. 4 , -
FIGS. 6 and 7 are perspective views of a spacer according to a second example of the invention, -
FIG. 8 is a front view of the spacer ofFIGS. 6 and 7 with its associated roller, and -
FIG. 9 is a section on IX-IX ofFIG. 8 . - The rolling bearing as illustrated on the
FIG. 1 is a large-diameter rolling bearing comprising aninner ring 1 and anouter ring 2 between which is housed one row ofcontact rollers 3. The rolling bearing also comprises a plurality ofspacers 4 disposed circumferentially between therollers 3 to maintain their circumferential spacing. As will be described later, thespacers 4 each exhibit a good stiffness and are adapted to avoid high deformations during and after manufacturing. - The inner and
outer rings rings - The
rollers 3 are identical with one another and each comprise anexterior rolling surface 3 a and opposite end transverse faces 3 b, 3 c delimiting axially the rolling surface. In the illustrated example, the rollingsurface 3 a of each roller has a cylindrical profile. Alternatively, the rolling surfaces may have a spherical profile or a logarithmic profile. In the illustrated example, the angle between therotation axis 3 d of each roller and the bearing axis is equal to 90°. Therotation axis 3 d of each roller extends radially. - The
inner ring 1 has abore 1 a of cylindrical shape designed to be fixed to a chassis or to a structure of machine (not shown) and delimited by opposite radial lateral surfaces 1 b, 1 c. Theinner ring 1 also comprises a stepped exteriorcylindrical surface 1 d onto which an annularradial raceway 5 is formed. Theraceway 5 has in cross-section a straight internal profile in contact with the rollingsurfaces 3 a of therollers 3. Theraceway 5 is formed by the radial surface provided between a firstaxial surface 6 of small-diameter and a secondaxial surface 7 of large-diameter of the stepped exteriorcylindrical surface 1 d. Theaxial surface 6 forms an annular guiding surface which may be in radial contact with thespacers 4. Theaxial guiding surface 6 is straight, disposed perpendicular to theraceway 5 and connected to the edge of small-diameter of the raceway by an annular concave fillet. The guidingsurface 6 extends axially from the edge and is connected to theradial surface 1 c of the inner ring. The guidingsurface 6 and theraceway 5 of the inner ring delimit an annular groove. - The
outer ring 2 comprises an outercylindrical surface 2 a delimited by opposite radial lateral surfaces 2 b, 2 c. Theouter ring 2 also comprises a steppedannular bore 2 d of cylindrical shape into which an annularradial raceway 8 is formed. Theraceway 8 has in cross-section a straight internal profile in contact with the rollingsurfaces 3 a of therollers 3. Theraceway 5 of the inner ring and theraceway 8 of the outer ring axially face each other and are parallel. Theraceway 8 is formed by the radial surface provided between a firstaxial surface 9 of small-diameter and a secondaxial surface 10 of large-diameter of the stepped bore 2 d. Theaxial surface 10 forms an annular guiding surface which may be in radial contact with thespacers 4. The guidingsurface 10 of the outer ring and the guidingsurface 6 of the inner ring radially face each other and are parallel. The guidingsurface 10 is straight, disposed perpendicular to theraceway 8 and connected to the edge of large-diameter of the raceway by an annular concave fillet. The guidingsurface 10 extends axially from the edge and is connected to theradial surface 2 b of the outer ring. The guidingsurface 10 and theraceway 8 of the outer ring delimit an annular groove. - The
raceway 5 and the guidingsurface 6 of the inner ring define together with theraceway 8 and the guidingsurface 10 of the outer ring an annular space inside which therollers 3 and thespacers 4 are disposed. Eachroller 3 arranged between theraceways spacer 4 which may bear against the guidingsurfaces raceways - The
spacers 4 are identical with one another and each placed between twoconsecutive rollers 3. Eachspacer 4 is made in one part by molding a polymer material such as polyamide. Alternatively, thespacers 4 may be made from metal or bronze. - As shown on
FIGS. 2 to 5 , eachspacer 4 comprises two parallel inner andouter portions lateral portion 13 extending transversally between theopposite portions adjacent rollers 3. Thelateral portion 13 is connected to a lateral edge of theinner portion 11 and to the opposite facing lateral edge of theouter portion 12. The inner andouter portions lateral portion 13 each have a rectangular shape with similar length and thickness. The width of theportions roller 3. - As shown on
FIG. 1 , theraceways surface outer parts spacer 4 and therings spacers 4, slight axial clearances are foreseen between each spacer and theraceways surface - Referring once again to
FIGS. 2 to 5 , the inner andouter portions lateral portion 13 of each spacer have in cross-section the overall shape of a C and delimit apocket 14 for receiving oneroller 3. Thepocket 14 is laterally open on the side opposite to thelateral portion 13 between the inner andouter portions spacer 4 into the rolling bearing, thepocket 14 is delimited in the circumferential direction by thelateral portion 13 and is delimited in the radial direction by the inner andouter portions pocket 14 of onespacer 4 is circumferentially open towards theadjacent spacer 4. Thepocket 14 of eachspacer 4 is open both axially in the two directions and circumferentially in one direction. Thepocket 14 is open on three sides. With regard to therotation axis 3 d of the associatedroller 3, the inner andouter portions lateral portion 13 extends axially between the portions and thepocket 14 is radially open toward the outside. On the side opposite to thelateral portion 13, an opening or aperture is delimited axially by the free lateral edges of the inner andouter portions pocket 14. - The inner and
outer portions roller 3. Thelateral portion 13 comprises an innerplanar contact surface 13 a forming a bearing surface for the rollingsurface 3 a of the associated roller. - The
inner portion 11 of each spacer also comprises a planarouter surface 11 b opposite to theinner surface 11 a and two spaced guiding ribs (not referenced) provided on the outer surface. The guiding ribs protrude outwards relative to theouter surface 11 b and extend transversally on the outer surface from one of the longitudinal edges of theinner portion 11 to the other edge. The opposite longitudinal edges delimit the inner andouter surfaces spacer 4 into the rolling bearing, theouter surface 11 b faces the guidingsurface 6 of the inner ring while remaining distant from the latter, and the guiding ribs may come into contact with the guiding surface. Since the inner andouter portions - The
lateral portion 13 of each spacer comprises a planarouter surface 13 b opposite to theinner contact surface 13 a and two spaced guiding ribs (not referenced) provided on the outer surface. The guiding ribs protrude outwards relative to theouter surface 13 b and extend transversally on the outer surface from one of the longitudinal edge of thelateral portion 13 to the other edge. The opposite longitudinal edges delimit theouter surface 13 b. In another embodiment, it may be possible to have a spacer deprived of ribs on the inner, outer andlateral portions - The
spacer 4 further comprises ahook 15 which slightly protrudes inwards toward theinner portion 11 from the free edge of theouter portion 12. Thehook 15 is disposed on theouter portion 12 on the side opposite to thelateral portion 13. Thehook 15 is centered on the free edge of theouter portion 12 and remains distant from the longitudinal edges of the outer portion. Thehook 15 comprises an inner planar contact surface forming a bearing surface for the rollingsurface 3 a of the associated roller. Thehook 15 is adapted to interfere with theroller 3 in order to avoid an escape from theopen pocket 14. Thehook 15 forms a circumferential retaining means for theroller 3. - The
spacer 4 further comprises first and second reinforcingbeams outer portions portions - The first reinforcing
beam 16 is disposed on the side opposite to thelateral portion 13. The reinforcingbeam 16 extends transversally between the free facing lateral edges of the inner andouter portions lateral portion 13. The reinforcingbeam 16 is connected to the lateral edges. The reinforcingbeam 16 also extends transversally between the facing longitudinal edges of the inner andouter portions beam 16 extends both the free lateral edges of the inner andouter portions beam 16 is disposed at a corner of the planar contact surfaces 11 a, 12 a of the inner and outer portions. The reinforcingbeam 16 has a concaveinner surface 16 a directed inward towards thepocket 14 and forming a bearing surface for the rollingsurface 3 a of the roller. - The second reinforcing
beam 17 faces the first reinforcingbeam 16 and is connected to thelateral portion 13. The reinforcingbeam 17 protrudes from theplanar contact surface 13 a towards the first reinforcingbeam 16. The reinforcingbeam 17 extends transversally between the facing longitudinal edges of the inner andouter portions beam 17 is disposed at a corner of the planar contact surfaces 11 a, 12 a of the inner and outer portions. The reinforcingbeam 17 has a concaveinner surface 17 a directed inward towards thepocket 14 and forming a bearing surface for the rollingsurface 3 a of the roller. Theinner surface 17 a extends theplanar contact surface 13 a of thelateral portion 13. Each of the inner contact surfaces 16 a, 17 a of the reinforcing beams has in cross-section a profile in the shape of an arc of circle with a radius R defined by 0.5×D≦R≦0.57×D with D corresponding to the diameter of the roller, R and D being expressed in mm. - The reinforcing beams 16, 17 extend from the contact surfaces 11 a, 12 a of the inner and outer portions and do not protrude outwards with regard to these portions. The reinforcing beams are spaced apart one form another along the facing longitudinal edges of the inner and
outer portions roller 3 protrudes. On one side of thespacer 4, the reinforcingbeams outer portions surface 3 a of the roller. - The use of the reinforcing
beams spacer 4. The stiffness of thespacer 4 is also increased by interposing, between the facing inner andouter portions spacer 4 into the rolling bearing, the stiffness of the spacer is increased in the radial direction. - Besides, with the reinforcing
members outer portions beams outer portions - Otherwise, with the
spacer 4 comprising the reinforcingbeams roller 3 is easier since the roller is carried by the beams on one side of the spacer. - In the mounted position of the
roller 3 inside thespacer 4, the inner andouter portions lateral portion 13 and thehook 15, and the reinforcingbeams spacer 4 into the rolling bearing, the inner andouter portions roller 3, and thelateral portion 13 and thehook 15 circumferentially maintain theroller 3. The reinforcing beams 16, 17 axially maintain theroller 3 in one direction. - In the mounted position of the
spacers 4 into the rolling bearing, at least one of the guiding ribs of the lateral portion of eachspacer 4 bears against the rollingsurface 3 a of theroller 3 which is housed into theadjacent spacer 4 since the pocket of the spacer is laterally open towards thelateral portion 13 of the other spacer. There is a direct contact between the guiding rib(s) of the lateral portion of one spacer and theadjacent roller 3 supported by thesuccessive spacer 4 in the circumferential direction. In the mounted position, there is only onelateral portion 13 disposed circumferentially between twosuccessive rollers 3. Thepocket 14 of each spacer enables to reduce the circumferential space between twosuccessive rollers 3. Accordingly, the number ofrollers 3 disposed between the inner andouter rings - In the second example illustrated on
FIGS. 6 to 9 , in which identical parts are given identical references, thespacer 4 is adapted to maintain aroller 3 having an increased length, for example equal to twice the length of the roller illustrated in the first example. Alternatively, a pair of two superposed rollers may be maintained by thespacer 4. In this case, the two associated rollers are mounted axially in contact to one another with regard to their common rotation axis. - In this example, the
spacer 4 further comprises a secondlateral portion 18 extending transversally from theouter portion 12 towards theinner portion 11 and facing the firstlateral portion 13. The first and secondlateral portions lateral portion 18 extends from the edge of theouter portion 12 located on the side opposite to the firstlateral portion 13. Thelateral portion 18 extends towards theinner portion 11 while remaining distant from the latter. The inner andouter portions lateral portions outer portions lateral portions roller 3. - The inner and
outer portions lateral portions pocket 14. An opening oraperture 19 is defined between the secondlateral portion 18 and theinner portion 11. Thepocket 14 is laterally open on the side opposite to the firstlateral portion 13 between theinner portion 11 and the secondlateral portion 18. In the mounted position of thespacer 4 into the rolling bearing, thepocket 14 is delimited in the circumferential direction by the first and secondlateral portions pocket 14 of onespacer 4 is circumferentially open towards theadjacent spacer 4 with theaperture 19. Thepocket 14 of eachspacer 4 is open both axially in the two directions and circumferentially in one direction. Thepocket 14 is open on three sides. With regard to therotation axis 3 d of theroller 3 held into thepocket 14 of each spacer, the inner andouter portions lateral portions beams pocket 14 is radially open toward the outside. Theaperture 19 is delimited axially by theinner portion 11 and thelateral portion 18. A free end of thelateral portion 18 defines with the free edge of theinner portion 11 theaperture 19 to open laterally thepocket 14 on the side opposite to the firstlateral portion 13. The free edge of the secondlateral portion 18 remains distant from theinner portion 11 to delimit theaperture 19. - The second
lateral portion 18 of the spacer comprises an innerplanar contact surface 18 a facing thecontact surface 13 a of thelateral portion 13 and forming a bearing surface for the rollingsurface 3 a of the roller. In the case of thespacer 4 maintains two superimposed rollers, thelateral portion 18 may have a length greater than the length of the upper roller in order to extend beyond the zone of contact between the upper roller and the lower roller. Accordingly, theinner contact surface 18 a also forms a bearing surface for the rolling surface of the lower roller. - In this example, the first reinforcing
beam 16 comprises anextension 20 which protrudes from the longitudinal edge of the beam located on the side opposite the firstlateral portion 13 and which is connected to the secondlateral portion 18. Theextension 20 of the reinforcing beam has a length equal to the one of thelateral portion 18 and is connected to theplanar contact surface 12 a of the outer portion. Theextension 20 extends transversally between the free edge of thelateral portion 18 and the longitudinal edge of theouter portion 12. Theextension 20 faces the first reinforcingbeam 16. Theextension 20 has a concaveinner surface 20 a forming a bearing surface for the rollingsurface 3 a of the roller which extends the concaveinner surface 16 a and which is connected to theplanar contact surface 18 a of thelateral portion 18. - The general structure of each
spacer 4 is lightened by the provision of apocket 14 defined by three or four portions or lugs and open in the circumferential direction towards the outside on the side opposite to thelateral portion 13. A weight reduction for eachspacer 4 is thus obtained. Besides, with the reinforcingbeams outer portions spacer 4 are increased. The deformations of the portions of the spacer are also reduced during and after the manufacturing and during use. - In the disclosed examples, each spacer comprises two reinforcing struts or beams provided between the inner and
outer portions lateral portion 13, or more than two reinforcing beams. - Although the invention has been illustrated on the basis of a rolling bearing having a single row of contact rollers, it should be understood that the invention can be applied to bearings having more rows of rollers. Otherwise, in the illustrated examples, the rolling bearing is adapted to accommodate axial loads. Alternatively, it may also be possible to have a rolling bearing adapted to accommodate radial loads or both axial and radial loads. Furthermore, the inner ring and/or the outer ring may comprise gearing teeth on their outer periphery, so as to be connected to driving gears for instance connected to the output shaft of a motor.
Claims (16)
0.5×D≦R≦0.57×D
0.5×D≦R≦0.57×D
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/224,623 US9127717B1 (en) | 2014-03-25 | 2014-03-25 | Spacer for rolling bearing having at least a reinforcing beam |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/224,623 US9127717B1 (en) | 2014-03-25 | 2014-03-25 | Spacer for rolling bearing having at least a reinforcing beam |
Publications (2)
Publication Number | Publication Date |
---|---|
US9127717B1 US9127717B1 (en) | 2015-09-08 |
US20150275969A1 true US20150275969A1 (en) | 2015-10-01 |
Family
ID=54012493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/224,623 Expired - Fee Related US9127717B1 (en) | 2014-03-25 | 2014-03-25 | Spacer for rolling bearing having at least a reinforcing beam |
Country Status (1)
Country | Link |
---|---|
US (1) | US9127717B1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017211146A1 (en) * | 2017-06-30 | 2019-01-03 | Aktiebolaget Skf | Rolling bearing spacers, in particular for use in a wind turbine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2222898A5 (en) | 1973-03-20 | 1974-10-18 | Rks | |
JPH064094Y2 (en) | 1987-02-03 | 1994-02-02 | 第一精工株式会社 | Cage for rolling elements |
JP4469711B2 (en) | 2004-12-08 | 2010-05-26 | 日本トムソン株式会社 | Linear motion guide unit with cage |
JP2008064248A (en) | 2006-09-08 | 2008-03-21 | Ntn Corp | Rolling bearing cage, rolling bearing, and spindle supporting structure for wind power generator |
DE102006056087A1 (en) | 2006-11-28 | 2008-05-29 | Robert Bosch Gmbh | spacer |
-
2014
- 2014-03-25 US US14/224,623 patent/US9127717B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
US9127717B1 (en) | 2015-09-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9341249B2 (en) | Spacer for rolling bearing, notably used in a wind turbine | |
EP2689153B1 (en) | Angular contact roller bearing, notably used in a wind turbine. | |
US9273728B2 (en) | Rolling bearing having rings with stepped surfaces opposite to the raceways | |
EP2707609B1 (en) | Spacer for rolling bearing, notably used in a wind turbine | |
EP2707610B1 (en) | Spacer for rolling bearing, notably used in a wind turbine | |
US20130182991A1 (en) | Thrust roller bearing and thrust roller bearing apparatus | |
US10030697B2 (en) | Axial bearing bridge for ball ramp | |
KR20180041127A (en) | Angular contact ball bearings | |
US8790021B2 (en) | Spacer for twin-row rolling bearing | |
US9551376B2 (en) | Bearing configuration with two-row polygonal bearing | |
US9127717B1 (en) | Spacer for rolling bearing having at least a reinforcing beam | |
EP2784340B1 (en) | Spacer for rolling bearing having at least a reinforcing beam | |
US20190010985A1 (en) | Segmented cage for rolling bearing | |
EP2628967B1 (en) | Loose C-shaped spacing body forming a pocket to accomodate a roller, in particular for a thrust roller bearing of a tunnel boring machine | |
JP2006112555A (en) | Roller bearing with aligning ring | |
US8845204B2 (en) | Spacer for rolling bearing with low friction contribution | |
US10578161B2 (en) | Spacer for rolling bearing, notably used in a wind turbine | |
WO2016194981A1 (en) | Tapered roller bearing | |
US20230204069A1 (en) | Ball spline having reinforcement bush part | |
US20160108959A1 (en) | Tapered roller bearing | |
JP5703494B2 (en) | Ball bearing | |
JP2019168084A (en) | Holder for cylindrical roller bearing, and cylindrical roller bearing |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: AKTIEBOLAGET SKF, SWEDEN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BOURON, CYRIL;MAGNY, JEAN-BAPTISTE;OVIZE, PASCAL;AND OTHERS;SIGNING DATES FROM 20140526 TO 20140530;REEL/FRAME:033008/0471 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
|
FEPP | Fee payment procedure |
Free format text: MAINTENANCE FEE REMINDER MAILED (ORIGINAL EVENT CODE: REM.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
LAPS | Lapse for failure to pay maintenance fees |
Free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
|
FP | Lapsed due to failure to pay maintenance fee |
Effective date: 20230908 |