Nonmetallic Patents (Class 384/576)
  • Patent number: 11002314
    Abstract: A spherical roller bearing providing an inner ring, an outer ring, rollers for rolling on raceways arranged on the rings, and a cage for holding the rollers spaced apart from each other. The cage having an annular core and a plurality of bars delimitating a plurality of pockets for the rollers, the annular core including two side faces from which the bars protrude axially outwardly, the inner and outer rings being rotatable with respect to each other around a bearing axis. The annular core further provides a plurality of spacing elements that protrude from the side faces of the annular core designed to come into contact with side faces of the rollers in order to prevent the rollers from moving axially towards the center of the bearing.
    Type: Grant
    Filed: January 27, 2020
    Date of Patent: May 11, 2021
    Assignee: Aktiebolaget SKF
    Inventors: Arne Lars Jonas Kullin, Marcus Loof, Yvonne Rydberg
  • Patent number: 10641332
    Abstract: A bearing includes an inner ring having an outer surface and a cage having both an inner surface and an outer surface. The cage inner surface is positioned to be in opposition to the inner ring outer surface. The bearing further includes an outer ring having both an inner surface and an outer surface. The outer ring inner surface is positioned to be in opposition to the cage outer surface. One or more of the inner ring outer surface, the cage inner surface, the cage outer surface, and the outer ring inner surface defines a non-circular circumferential profile.
    Type: Grant
    Filed: December 6, 2016
    Date of Patent: May 5, 2020
    Assignee: General Electric Company
    Inventors: Fabio Nonato de Paula, Bugra Han Ertas, Darren Lee Hallman
  • Patent number: 10539184
    Abstract: A taper roller bearing includes: an inner ring, an outer ring, a plurality of taper rollers, and an annular cage. The cage includes a small-diameter annular portion on one axial side, a large-diameter annular portion on the other axial side, and a plurality of column portions. A radial inner surface of the column portion is provided along a second virtual taper surface that is in the vicinity of a first virtual taper surface including a center line of the plurality of taper rollers, across the entire length in the longitudinal direction of the column portion.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: January 21, 2020
    Assignee: JTEKT CORPORATION
    Inventors: Shigeo Kamamoto, Junji Murata, Yuki Shishihara
  • Patent number: 10378584
    Abstract: A cage for a radial roller bearing includes an inner cage member made of a continuous annular steel material and having a plurality of through holes, in which a plurality of rollers is housed in a corresponding one of the through holes, and an outer cage member made from resin and having a plurality of retaining holes, in which the plurality of rollers is retained such that the rollers are rollable, provided in correspondence with the through holes. The outer cage member is fixed to an outer side of the inner cage member by an axial projection-recess fitting structure.
    Type: Grant
    Filed: November 16, 2018
    Date of Patent: August 13, 2019
    Assignee: JTEKT CORPORATION
    Inventor: Kotaro Yamashita
  • Patent number: 10260563
    Abstract: A bearing cage for a roller bearing assembly is provided. The roller bearing assembly includes an outer annular ring, an inner annular ring including an outer radial surface, and a plurality of roller elements. The bearing cage includes an annular body configured to be positioned between the inner annular ring and the outer annular ring and configured to receive the plurality of roller elements. The annular body includes a first end including a first inner radial surface opposite the inner annular ring and a second end including a second inner radial surface opposite the inner annular ring, wherein the annular body extends from the first end to the second end in an axial direction. The annular body includes a first lubricant interface configured to receive oil and defined by the first inner radial surface and a second lubricant interface configured to receive oil and defined by the second inner radial surface.
    Type: Grant
    Filed: May 18, 2017
    Date of Patent: April 16, 2019
    Assignee: General Electric Company
    Inventor: Kenneth Lee Fisher
  • Patent number: 10253812
    Abstract: A taper roller bearing includes: an inner ring, an outer ring, a plurality of taper rollers, and an annular cage. The cage includes a small-diameter annular portion on one axial side, a large-diameter annular portion on the other axial side, and a plurality of column portions. A radial inner surface of the column portion is provided along a second virtual taper surface that is in the vicinity of a first virtual taper surface including a center line of the plurality of taper rollers, across the entire length in the longitudinal direction of the column portion.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: April 9, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Shigeo Kamamoto, Junji Murata, Yuki Shishihara
  • Patent number: 10180161
    Abstract: A tapered roller bearing includes an inner ring, an outer ring, a plurality of tapered rollers, and an annular cage that holds the tapered rollers. The cage has a small annular portion positioned on one side, in the axial direction, of the tapered rollers, a large annular portion positioned on the other side, in the axial direction, of the tapered rollers, and a plurality of cage bars that couple the small annular portion and the large annular portion to each other. The cage bars each have a cage bar end portion that is positioned between the large annular portion and a large rib and that projects toward the other side in the axial direction with respect to large end surfaces of the tapered rollers.
    Type: Grant
    Filed: November 13, 2017
    Date of Patent: January 15, 2019
    Assignee: JTEKT CORPORATION
    Inventors: Yuki Shishihara, Shigeo Kamamoto, Junji Murata
  • Patent number: 10156258
    Abstract: A taper roller bearing includes: an inner ring, an outer ring, a plurality of taper rollers, and an annular cage. The cage includes a small-diameter annular portion on one axial side, a large-diameter annular portion on the other axial side, and a plurality of column portions. A radial inner surface of the column portion is provided along a second virtual taper surface that is in the vicinity of a first virtual taper surface including a center line of the plurality of taper rollers, across the entire length in the longitudinal direction of the column portion.
    Type: Grant
    Filed: October 23, 2015
    Date of Patent: December 18, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Shigeo Kamamoto, Junji Murata, Yuki Shishihara
  • Patent number: 9897139
    Abstract: A tapered roller bearing includes inner ring, outer ring, plurality of tapered rollers placed between inner and outer rings, and retainer having pockets receiving tapered rollers. Small diameter annular portion of retainer closes a small diameter side opening portion so that lubricating oil more than needed for lubrication can be limited from flowing into a bearing internal space. The small diameter side opening portion is constituted by a small collar portion provided on one axial end side of inner ring and one axial end portion of outer ring. A sliding contact face and recess portion are provided in radially outer side surface of each columnar portion. The sliding contact face is in sliding contact with outer ring raceway surface so that the retainer can be positioned radially by an outer ring raceway surface. Recess portion is recessed radially so that adjacent ones of the pockets can communicate with each other.
    Type: Grant
    Filed: November 25, 2014
    Date of Patent: February 20, 2018
    Assignee: JTEKT CORPORATION
    Inventors: Shigeo Kamamoto, Junji Murata
  • Patent number: 9863471
    Abstract: A spherical roller bearing is provided having an outer ring that includes at least one inner raceway, an inner ring that includes a first and a second outer raceway, a plurality of roller elements disposed in a first and second roller row between the at least one inner raceway and the first and second outer raceway, a cage for one of guiding and retaining the roller elements in the first and second roller row, the cage includes a plurality of cage pockets, in which one of the plurality pf rollers is disposed within each cage pocket. The bearing further provides a specific pitch circle diameter (PCD), and when the cage is under-pitch roller centered in relation to the pitch circle diameter (PCD). In addition, a bearing arrangement and a wind turbine bearing arrangement is disclosed.
    Type: Grant
    Filed: April 6, 2016
    Date of Patent: January 9, 2018
    Assignee: AKTIEBOLAGET SKF
    Inventors: Marcus Loof, Peter James, Lars Stigsjöö
  • Patent number: 9850948
    Abstract: A rolling-element bearing cage or cage element includes at least one axial bridge region having first and second guide surfaces, the first guide surface and the second guide surface each have a recessed region axially between first and second non-recessed regions, at least one V-shaped receiving space in a radial outer surface of the rolling-element bearing cage or cage element configured to receive lubricant, and first and second fluid channels extending from the at least one receiving space to the recessed regions of the first and second guide surfaces. The fluid channels have rectangular cross sections, are about as wide as a width of the recessed regions, and are angled at an acute angle to a radial direction, and the receiving space is approximately as wide as the recessed regions.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: December 26, 2017
    Assignee: AKTIEBOLAGET SKF
    Inventors: Sabine Hofmann, Baozhu Liang
  • Patent number: 9829038
    Abstract: A spherical roller bearing providing an outer ring having at least one inner raceway, an inner ring including a first and a second outer raceway, a plurality of roller elements arranged in a first and second roller row in-between the at least one inner raceway and the respective first and second outer raceway. The bearing includes a cage for retaining the roller elements in the rows. The cage provides a plurality of cage pockets where roller element is disposed in each. The cage is arranged such that; during operation, a loaded zone of the bearing is located at a radial top region of the bearing, the cage is roller centered on the axially inner ends of the roller elements, and when, during operation, a loaded zone is located at a radial bottom region of the bearing, the cage is under-pitch roller centered in relation to a pitch circle diameter (PCD).
    Type: Grant
    Filed: April 4, 2016
    Date of Patent: November 28, 2017
    Assignee: AKTIEBOLAGET SKF
    Inventors: Marcus Loof, Peter James, Lars Stigsjöö
  • Patent number: 9777772
    Abstract: A roller-cage assembly including rolling elements and a cage is provided. The cage includes crossbars extending between an inner and outer ring that define rolling element pockets. Each of the crossbars is tapered from a larger width at the radially outer ring to a smaller width at the radially inner ring, and is connected to the radially inner ring at a first cross-sectional connection area. The crossbars have a first and second lateral surface for supporting the rolling elements. The first cross-sectional connection area of each of the crossbars has a minimum width and a first height. A maximum distance is defined between outer surfaces of adjacent rolling elements and is greater than zero. The minimum width of the first cross-sectional connection area is greater than the maximum distance defined between outer surfaces of adjacent rolling elements at radially inner ends thereof, and is 30-50% of the first height.
    Type: Grant
    Filed: September 15, 2015
    Date of Patent: October 3, 2017
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Ron Brewer, David McSwain
  • Patent number: 9638250
    Abstract: A cage for a crankshaft bearing or a connecting-rod bearing of an internal combustion engine or for a compressor has a plurality of receiving pockets for guiding bearing rolling elements and has an axial width. The cage includes at least first and second cage segments, each cage segment having a segment axial width equal to the axial width of the cage and having a first end circumferentially spaced from a second end, the first cage segment first end being connected to the second cage segment second end by an interference fit and the first cage segment second end being connected to the second cage segment first end by an interference fit.
    Type: Grant
    Filed: October 29, 2015
    Date of Patent: May 2, 2017
    Assignee: AKTIEBOLAGET SKF
    Inventor: Dieter Steblau
  • Patent number: 9638248
    Abstract: Pillar parts (10) are connected to the inner peripheral surface (5b) of a large-diameter rim part (5) and to the outer peripheral surface (7b) of a small-diameter rim part (7). The inner peripheral surface (5b) of the large-diameter rim part (5) and the outer peripheral surface (7b) of the small-diameter rim part (7) 5 respectively have axial-direction inside portions (5c), (7c) overlapping with the pillar parts (10) in the axial direction and axial-direction outside portions (5d), (7d) not overlapping with the pillar parts (10) in the axial direction. A small-diameter annular member (2) is internally fitted in the axial-direction outside portion (5d) of the inner peripheral 10 surface (5b) of the large-diameter rim part (5). A large-diameter annular member (4) is externally fitted in the axial-direction outside portion (7d) of the outer peripheral surface (7b) of the small-diameter rim part (7).
    Type: Grant
    Filed: November 26, 2014
    Date of Patent: May 2, 2017
    Assignee: NSK LTD.
    Inventor: Ryosuke Yamada
  • Patent number: 9382947
    Abstract: In a circumferential end face 22a that is provided so as to face a discontinued portion 12a, portions that are aligned axially with a one-end-side rim portion 8b and an other-end-side rim portion 9b are made as one-end-side bearing surfaces 23a, 23a. In addition, in the other circumferential end face 24a, portions that are aligned axially with the one-end-side rim portion 8b and the other-end-side rim portion 9b are made as other-end-side bearing surfaces 25a, 25a. Then, in circumferential clearances 26 that are present between the circumferential end face 22a and the other circumferential end face 24a, circumferential clearances present between the one-end-side bearing surfaces 23a, 23 and the other-end-side bearing surfaces 25a, 25a are smaller than clearances at the other portions.
    Type: Grant
    Filed: July 12, 2013
    Date of Patent: July 5, 2016
    Assignee: NSK LTD.
    Inventor: Yutaka Ishibashi
  • Patent number: 9194469
    Abstract: A bearing assembly having a cage that holds a plurality of rollers, an inner race, and an outer race. A layer of viscoelastic material positioned between the inner race and a swashplate and/or the outer race and the housing. Alternatively, the inner race has an elongated groove that receives an O-ring segment and a holder that is fitted over the inner race.
    Type: Grant
    Filed: August 22, 2013
    Date of Patent: November 24, 2015
    Assignee: DANFOSS POWER SOLUTIONS INC.
    Inventors: Jaromir Tvaruzek, Joseph Wright
  • Patent number: 9145918
    Abstract: A split rolling element guide for a bearing assembly for a balance shaft of an internal combustion engine, having two axial support faces and a plurality of axial cross members defining rolling element pockets. A plurality of radial cutouts at each pocket increase flexibility of the cage and allow for greater opening of the cage at the split portion.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: September 29, 2015
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Kate Higdon, Jeffrey Shewell
  • Patent number: 9140303
    Abstract: A cage for a roller bearing having a bearing axis extending in an axial direction, the cage including at least two crosspieces which extend between two axially spaced edges and are spaced from one another in a circumferential direction oriented perpendicular to the axial direction so that a rolling element can be disposed between them. At least one crosspiece of the at least two crosspieces has a first surface region that is a constant radial distance from the bearing axis, and the at least one crosspiece has a second surface region which is adjacent to the first surface region and includes a step along which the radial distance from the bearing axis varies.
    Type: Grant
    Filed: August 13, 2014
    Date of Patent: September 22, 2015
    Assignee: AKTIEBOLAGET SKF
    Inventors: Rico Dittmar, Volker Wendt
  • Patent number: 9097283
    Abstract: A light weight bearing cage assembly (100) consisting of a plurality of snap-on bridge elements (104) coupled between first and second cage support rings (102A, 102B) conforming to the surfaces of adjacent rolling elements (10). The snap-on bridge elements maintain rolling element (10) in separation, provide rolling element retention within the bearing assembly, and function as a lubrication reservoir between the rolling elements for grease lubricated bearings. Each snap-on bridge element may be individually removed and replaced by snap-on engagement with the first and second cage support rings. Optional locking clips or rings (300, 302) fitted over each snap fitting end of the bridge elements optionally provides additional security against accidental uncoupling of the bridge elements from the first and second cage rings.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: August 4, 2015
    Assignee: The Timken Company
    Inventor: Brian J. Werner
  • Publication number: 20150147014
    Abstract: A cage blank for a free wheel with rolling bodies is formed by an elongated strip defining housings for receiving rolling bodies juxtaposed in a rectilinear longitudinal direction of the blank. It is provided, at both of its ends, with means for attaching the two ends together, in a configuration where the cage forms a closed loop. A cage is formed by bending the blank on itself, perpendicular to its longitudinal direction, and engaging its attaching means.
    Type: Application
    Filed: November 25, 2014
    Publication date: May 28, 2015
    Applicant: AKTIEBOLAGET SKF
    Inventors: Charles Chambonneau, Samuel Viault
  • Patent number: 8998498
    Abstract: A tapered roller bearing improves durability during a state of insufficient lubrication by sufficiently lengthening the time until rotation becomes impossible due to seizure. Oil retaining concave sections, recessed outward in the radial direction, are formed in portions on the inner circumferential surface of a large-diameter rim section of the retainer whose phase in the circumferential direction coincides with the pockets. A portion of the bottom surface of each of the oil retaining concave sections, open to the inside surface of the pocket, face a concave section formed in an end surface on the large-diameter side of tapered roller that is held inside the pocket. When lubrication becomes insufficient, oil remaining in the concave sections is effectively used for lubricating areas of sliding contact between the end surfaces on the large-diameter side and the inside surface in the axial direction of a large-diameter side flange section.
    Type: Grant
    Filed: November 17, 2010
    Date of Patent: April 7, 2015
    Assignee: NSK Ltd.
    Inventors: Hironori Mizuki, Yasuhiro Ishimori, Masahiro Kita, Hiroki Maejima, Kinji Yukawa, Tomoharu Saito, Yingyi Wen
  • Patent number: 8985860
    Abstract: A prong type resin cage includes: an annular portion; and multiple cage bars. Each cage bar has a roller guide face formed in each opposed face thereof, the opposed face being opposed to an outer peripheral face of a corresponding one of rollers. The roller guide face is used for roller guide by the outer peripheral face at a rotational speed equal to or lower than a prescribed rotational speed. A cage outer face including an outer peripheral face of the annular portion and radially outer faces of the cage bars has outer ring guide faces of which diameter is increased radially outward by a centrifugal force to decrease a radial clearance between the outer ring guide faces and an inner peripheral face of the outer ring, so that outer ring guide by the inner peripheral face is carried out, at a rotational speed higher than the prescribed rotational speed.
    Type: Grant
    Filed: March 28, 2014
    Date of Patent: March 24, 2015
    Assignee: JTEKT Corporation
    Inventor: Hayaki Honjo
  • Patent number: 8944696
    Abstract: Achieved is a cage for a radial roller bearing that is made by axial draw molding, and that can suppress wear due to friction between the end sections in the axial direction and the guide surfaces of the opposing members, without the assembly direction being restricted, even when guide surfaces of opposing members are not able to support the cage over the entire area of the end surfaces in the axial direction. The cage 7c is composed of a pair of circular ring shaped rim sections 8e, 8f and a plurality of column sections 9, with the spaces between column section 9 that are adjacent in the circumferential direction functioning as pockets 10.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: February 3, 2015
    Assignee: NSK Ltd.
    Inventor: Yutaka Ishibashi
  • Publication number: 20150016762
    Abstract: The invention relates to a method for producing a rolling bearing cage for a rolling bearing comprising at least one row of rolling elements. In the method according to the invention, a ring or a ring element made of a metallic solid material is provided and shaped by a forming process and/or a cutting, material-removing process into an annular or segmented main body of the rolling bearing cage. The main body has openings for receiving a respective rolling element, the main body being heated to a temperature above a minimum coating temperature for thermal coating with a thermoplastic material powder, wherein the main body is then immersed in a fluidized bed containing the thermoplastic material powder, wherein thermoplastic material powder adheres to the main body, melts and forms a contiguous coating while the main body is present in the fluidized bed, and wherein, after the coating, the main body is removed from the fluidized bed.
    Type: Application
    Filed: February 27, 2013
    Publication date: January 15, 2015
    Applicant: THYSSENKRUPP ROTHE ERDE GMBH
    Inventors: Wolfgang Claus, Reinhard Juergens, Stefan Schnieder, Joerg Rollmann
  • Patent number: 8888373
    Abstract: A rolling bearing cage (10) having a plurality of loose segments (11, 12, 13, 14) arranged in the circumferential direction is provided. The segments (11, 12, 13, 14) comprise a main body (15) having at least one pocket (16) for receiving rolling bodies (21). At least one play compensating element (17) is arranged circumferentially between two adjacent main bodies (15), and the play compensating element (17) has circumferentially a higher elasticity than a main body (15), and the segments (11, 12, 13, 14) are arranged circumferentially without play at room temperature.
    Type: Grant
    Filed: November 28, 2011
    Date of Patent: November 18, 2014
    Assignee: Schaeffler Technologies GmbH & Co. KG
    Inventors: Andreas Mangold, Tobias Müller, Andreas Bierlein
  • Patent number: 8864387
    Abstract: A retainer for a roller bearing holds needle rollers within slit-shaped pockets which are formed separately by means of partitions arranged with a fixed pitch in the circumferential direction. Each partition is equipped with two side faces, which face the sides of the adjacent partitions, and an outer-circumferential-side end face, which faces the outer circumferential side of the retainer, and retaining protrusions are formed at the corner parts where the outer-circumferential-side end faces and each side face intersect. Each retaining protrusion protrudes farther to the outer circumferential side from the outer-circumferential-side end face, and protrudes obliquely in the direction in which the aperture width of the pockets is narrowed. For each pocket the positions where the retaining protrusions are formed in the longitudinal direction of the partitions are set so as not to overlap the adjacent pockets.
    Type: Grant
    Filed: May 24, 2011
    Date of Patent: October 21, 2014
    Assignee: Harmonic Drive Systems, Inc.
    Inventors: Yoshihide Kiyosawa, Keiji Ueura, Sohei Beppu
  • Publication number: 20140301690
    Abstract: A prong type resin cage includes: an annular portion; and multiple cage bars. Each cage bar has a roller guide face formed in each opposed face thereof, the opposed face being opposed to an outer peripheral face of a corresponding one of rollers. The roller guide face is used for roller guide by the outer peripheral face at a rotational speed equal to or lower than a prescribed rotational speed. A cage outer face including an outer peripheral face of the annular portion and radially outer faces of the cage bars has outer ring guide faces of which diameter is increased radially outward by a centrifugal force to decrease a radial clearance between the outer ring guide faces and an inner peripheral face of the outer ring, so that outer ring guide by the inner peripheral face is carried out, at a rotational speed higher than the prescribed rotational speed.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 9, 2014
    Applicant: JTEKT CORPORATION
    Inventor: Hayaki HONJO
  • Publication number: 20140301683
    Abstract: A split rolling element guide for a bearing assembly for a balance shaft of an internal combustion engine, having two axial support faces and a plurality of axial cross members defining rolling element pockets.
    Type: Application
    Filed: April 2, 2014
    Publication date: October 9, 2014
    Applicant: SCHAEFFLER TECHNOLOGIES GMBH & CO. KG
    Inventors: Kate Higdon, Jeffrey Shewell
  • Patent number: 8851761
    Abstract: In a split cage for a rolling bearing, cage segments each having a plurality of pockets that accommodate rolling elements are arranged in a circular manner along the circumferential direction. Protrusions are formed on end faces of rims of one of the adjacent cage segments, and grooves are formed in end faces of rims of the other one of the adjacent cage segments. By fitting the protrusions into the grooves, the adjacent cage segments are prevented from moving relative to each other in the radial direction.
    Type: Grant
    Filed: May 20, 2013
    Date of Patent: October 7, 2014
    Assignee: JTEKT Corporation
    Inventor: Takeshi Miyachi
  • Publication number: 20140248018
    Abstract: A tapered roller bearing (31a) has a plurality of retainer segments (11a, 11d) each having a pocket to house a tapered roller (34a), and arranged so as to be continuously lined with each other in a circumferential direction between an outer ring (32a) and an inner ring (33a). The retainer segment (11a, 11d) is formed of a resin containing a filler material to lower a thermal linear expansion coefficient. In addition, a clearance (39a) is provided between the first retainer segment (11a) and the last retainer segment (11d) after the plurality of retainer segments (11a, 11d) have been arranged in the circumferential direction without providing any clearance. Here a circumferential range (R) of the clearance (39a) is larger than 0.075% of a circumference of a circle passing through a center of the retainer segment (11a, 11d) and smaller than 0.12% thereof at room temperature.
    Type: Application
    Filed: May 16, 2014
    Publication date: September 4, 2014
    Applicant: NTN CORPORATION
    Inventors: Tatsuya Omoto, Eiichi Nakamizo, Tomoya Sakaguchi
  • Patent number: 8821024
    Abstract: The present invention provides a member for a rolling bearing (1) which is capable of decreasing the amount of carbon dioxide generated from a polymeric member in discarding the rolling bearing, contributing to restraint or prevention of an increase in the concentration of the carbon dioxide in the atmosphere or a decrease of the concentration thereof in the atmosphere, and allows a continuous use temperature to be high and an endurance time to be long and a rolling bearing using the member. The member for the rolling bearing (1) is composed of a molding of a polymeric elastic body or a synthetic resin composition. The member is at least one member selected from among an inner ring (2), an outer ring (3), rolling elements (4), a retainer (5), and a sealing member (6). A raw material derived from a biomass is at least partially used for a producing raw material of a polymeric matrix composing the polymeric elastic body or the synthetic resin composition.
    Type: Grant
    Filed: February 20, 2009
    Date of Patent: September 2, 2014
    Assignee: NTN Corporation
    Inventors: Eiichirou Shimazu, Masaki Egami, Yoshihide Himeno, Kazutoyo Murakami
  • Patent number: 8801295
    Abstract: A retainer for a tapered roller includes a first side having a first radius and a second side having a second radius, wherein the first radius is smaller than the second radius, a first ring portion at the first side of the retainer, a second ring portion at the second side of the retainer, and a plurality of brace portions arranged between the first ring portion and the second ring portion. The retainer is made of a resin material and is configured to retain tapered rollers in pockets formed between the brace portions. A hook portion is formed at the second side of the retainer, and is engaged with an inner race on a second side having a larger radius than a first side thereof. An outer diameter of each pocket on the first side of the retainer is larger than an inner diameter of the hook portion.
    Type: Grant
    Filed: March 23, 2011
    Date of Patent: August 12, 2014
    Assignee: NTN Corporation
    Inventor: Takashi Ueno
  • Publication number: 20140221150
    Abstract: Surface indentation and oil film shortage on rollers is prevented and longer service life of a roller bearing is achieved, by preventing wear debris from being caught and accumulated in pockets of a holder of the roller bearing. Positions and dimensional relations of the diameters of inner and outer ring raceways, the inner and outer diameters of the holder, and inner and outer protrusions which are provided to pillar parts of the holder to prevent the rollers from coming off are defined such that the inner and outer protrusions of the pillar parts always do not come into contact with the outer circumferential surfaces of the rollers in the state where the rollers and the holder are incorporated between inner and outer members. As a result, lubricant oil is smoothly circulated in gaps formed between the outer circumferential surfaces of the rollers and the pillar parts of the holder.
    Type: Application
    Filed: August 30, 2012
    Publication date: August 7, 2014
    Inventors: Tsutomu Nakagawa, Masashi Nishimura, Shinji Oishi
  • Patent number: 8790020
    Abstract: A rolling bearing cage, which has two annular elements and cage crossbars connecting the annular elements to each other so as to form pockets for receiving rolling elements arranged between every two adjacent cage crossbars and the annular elements. The cage crossbars have an elastic configuration. Also, a rolling bearing is disclosed that has a rolling bearing cage.
    Type: Grant
    Filed: February 1, 2012
    Date of Patent: July 29, 2014
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Peter Friedrich, Michael Krueger, Steffen Saebsch, Heinz Schaefers, Matthias Fick, Manfred Winkler, Johannes Enders
  • Patent number: 8783966
    Abstract: A tapered roller bearing (1) with two coaxial bearing rings (2, 3) and a multiplicity of tapered rollers (4) which are arranged between the bearing rings (2, 3), are guided in a cage (10, 11, 12) and roll on raceways (7, 8) on the bearing rings (2, 3), with a rim (9) at the large diameter of the inner bearing ring (3), wherein the cage (10, 11, 12) is formed of side rings (10, 11) and webs (12) which connect them, with the formation of pockets (13) for the tapered rollers (4), and elastic projections (14) are arranged on one side ring (10), which projections (14) interact with the rim (9) and prestress the cage (10, 11, 12) with the tapered rollers (4) axially against the rim (9).
    Type: Grant
    Filed: February 6, 2012
    Date of Patent: July 22, 2014
    Assignee: Schaeffler Technologies GmbH & Co. KG
    Inventors: Thorsten Schlegel, Armin Necker, Werner Motzkus
  • Patent number: 8770853
    Abstract: A split cage for a rolling bearing includes a plurality of cage segments formed of synthetic resin and arranged annularly in a circumferential direction. Each cage segment includes: a first rim portion and a second rim portion that are spaced from each other by a predetermined interval and face each other; and a plurality of bar portions extending from the first rim portion to the second rim portion. Spaces, each of which is surrounded by the bar portions adjacent to each other and the first and second rim portions, are formed as pockets that house rolling elements. Projections for reinforcement are formed at radial end portions of boundaries between the bar portions and the first rim portion and/or boundaries between the bar portions and the second rim portion.
    Type: Grant
    Filed: May 17, 2013
    Date of Patent: July 8, 2014
    Assignee: JTEKT Corporation
    Inventor: Takeshi Miyachi
  • Publication number: 20140153857
    Abstract: The invention presents a cage (1) for separating rollers in a toroidal roller bearing. The cage (1) comprises a first and second annular ring (2, 3), a plurality of elongated axial members (4) interposed between the first and second annular ring to thereby form a number of roller pockets (5). The cage further presents a portion (6) extending radially inwardly on at least one of the first and second annular ring. The portion further extends in at least a part of the circumference of the at least one first and second annular ring. The radially outer peripheral surface of the annular ring presenting the portion presents axial grooves (7) at least at the circumference having the portion, wherein each axial groove is located at the axial end face of each roller pocket in such a way that a roller can be inserted and pulled out via the axial groove into and out of each roller pocket.
    Type: Application
    Filed: May 7, 2012
    Publication date: June 5, 2014
    Applicant: AKTIEBOLAGET SKF
    Inventor: Arne Lars Jonas Kullin
  • Patent number: 8721188
    Abstract: A cage for a rolling element bearing and a method for the production thereof. The cage has either an increased number of rolling elements or improved load-bearing capacity. A The cage has a plurality of cage pockets for receiving the rolling elements, two side rings and a plurality of cross-ribs. The cross-ribs connect the side rings such that the cage pockets are formed. The cage pockets have milled-out or drilled-out corner regions. hereinafter collectively referred to as milled-out corner regions, The corner regions, in a cutting plane perpendicular to the axis of rotation of the cage, have a radial milling course in the direction of the axis of rotations. The milling course, at least in a partial section, is configured at an incline with respect to a radial vector placed through the partial section and the axis of rotation, and is configured at an incline in the direction of the cage pocket.
    Type: Grant
    Filed: November 12, 2008
    Date of Patent: May 13, 2014
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Hans-Juergen Fandre, Alexander Tietz
  • Publication number: 20140112609
    Abstract: Achieved is a cage for a radial roller bearing that is made by axial draw molding, and that can suppress wear due to friction between the end sections in the axial direction and the guide surfaces of the opposing members, without the assembly direction being restricted, even when guide surfaces of opposing members are not able to support the cage over the entire area of the end surfaces in the axial direction. The cage 7c is composed of a pair of circular ring shaped rim sections 8e, 8f and a plurality of column sections 9, with the spaces between column section 9 that are adjacent in the circumferential direction functioning as pockets 10.
    Type: Application
    Filed: October 16, 2012
    Publication date: April 24, 2014
    Applicant: NSK Ltd.
    Inventor: Yutaka Ishibashi
  • Patent number: 8641291
    Abstract: A comb-shaped resin retainer includes an annular section and a plurality of pillar sections which protrude to one side in the axial direction from one side of the annular section. A gap between the pillar sections, adjacent to each other in the circumferential direction serves as a pocket for retaining a cylindrical roller. A side face of the pillar section which serves as the inner face of the pocket is formed in a recessed shape. Each pillar section is tilted so as to become closer to the retainer axial center as the pillar section extends toward the tip of the pillar section. A flat portion is provided on the side face of the pillar section which serves as the inner face of the pocket. The flat portion continues axially from the tip portion of the pillar section to the base end portion thereof.
    Type: Grant
    Filed: November 2, 2011
    Date of Patent: February 4, 2014
    Assignee: NTN Corporation
    Inventor: Naota Yamamoto
  • Publication number: 20140016892
    Abstract: A retainer for a roller bearing holds needle rollers within slit-shaped pockets which are formed separately by means of partitions arranged with a fixed pitch in the circumferential direction. Each partition is equipped with two side faces, which face the sides of the adjacent partitions, and an outer-circumferential-side end face, which faces the outer circumferential side of the retainer, and retaining protrusions are formed at the corner parts where the outer-circumferential-side end faces and each side face intersect. Each retaining protrusion protrudes farther to the outer circumferential side from the outer-circumferential-side end face, and protrudes obliquely in the direction in which the aperture width of the pockets is narrowed. For each pocket the positions where the retaining protrusions are formed in the longitudinal direction of the partitions are set so as not to overlap the adjacent pockets.
    Type: Application
    Filed: May 24, 2011
    Publication date: January 16, 2014
    Applicant: HARMONIC DRIVE SYSTEMS, INC.
    Inventors: Yoshihide Kiyosawa, Keiji Ueura, Sohei Beppu
  • Patent number: 8596877
    Abstract: A tapered roller bearing includes a retainer with a protrusion that is axially brought into engagement with a flange of the inner race. The inner race has a flange for guiding the tapered rollers only at the large-diameter end of the raceway. The retainer has on the large-diameter side thereof a protrusion radially inwardly extending and axially engaging the flange of the inner race. The flange of the inner race is formed with a circumferentially continuous cutout groove having a smoothly curved concave surface through which the radially outer surface and the outer end surface of the flange are connected to each other. The protrusion of the retainer has its inner side at its radially inner end portion in engagement with the cutout groove, allowing size reduction and load bearing capacity increase for the tapered roller bearing, while preventing stress concentration on the flange of the inner race.
    Type: Grant
    Filed: November 7, 2008
    Date of Patent: December 3, 2013
    Assignee: NTN Corporation
    Inventors: Yasuhiro Kanbori, Takashi Ueno
  • Publication number: 20130315522
    Abstract: In a split cage for a rolling bearing, cage segments each having a plurality of pockets that accommodate rolling elements are arranged in a circular manner along the circumferential direction. Protrusions are formed on end faces of rims of one of the adjacent cage segments, and grooves are formed in end faces of rims of the other one of the adjacent cage segments. By fitting the protrusions into the grooves, the adjacent cage segments are prevented from moving relative to each other in the radial direction.
    Type: Application
    Filed: May 20, 2013
    Publication date: November 28, 2013
    Applicant: JTEKT CORPORATION
    Inventor: Takeshi MIYACHI
  • Patent number: 8568038
    Abstract: A roller bearing assembly includes a plurality of rollers (122), a cage (114) including a plurality of slots (118) for positioning the plurality of rollers, an outer race (134) positioned radially outside the plurality of rollers and the cage, and means (126,130,138) for retaining axial alignment between the cage and the outer race provided integrally with at least one of the cage and the outer race.
    Type: Grant
    Filed: September 30, 2008
    Date of Patent: October 29, 2013
    Assignee: Koyo Bearings USA LLC
    Inventors: Fabrice Lemaitre, Matthieu Lavieuville, Christophe Artur, Jens-Eike Jesau
  • Publication number: 20130266249
    Abstract: A pair of rim portions 4a and 4b is formed in the shape of a discontinuous segmental circular ring, which includes cutout portions 8a and 8b, respectively, at one position. The cutout portions of the respective rim portions are concentrically disposed so as to face each other with a predetermined interval therebetween in an axial direction while having the same phase in a circumferential direction. A plurality of pillar portions 6 form pockets 10 where rollers 14 are retained. An expandable elastic connecting portion 12, which connects one end portion 84a of one rim portion in the circumferential direction to the other end portion 82b of the other rim portion in the circumferential direction, is provided at the pair of rim portions.
    Type: Application
    Filed: September 13, 2011
    Publication date: October 10, 2013
    Applicant: NSK LTD.,
    Inventors: Yutaka Ishibashi, Makoto Watanabe, Tetsuya Takahashi
  • Publication number: 20130223785
    Abstract: A comb-shaped resin retainer includes an annular section and a plurality of pillar sections which protrude to one side in the axial direction from one side of the annular section. A gap between the pillar sections, adjacent to each other in the circumferential direction serves as a pocket for retaining a cylindrical roller. A side face of the pillar section which serves as the inner face of the pocket is formed in a recessed shape. Each pillar section is tilted so as to become closer to the retainer axial center as the pillar section extends toward the tip of the pillar section. A flat portion is provided on the side face of the pillar section which serves as the inner face of the pocket. The flat portion continues axially from the tip portion of the pillar section to the base end portion thereof.
    Type: Application
    Filed: November 2, 2011
    Publication date: August 29, 2013
    Inventor: Naota Yamamoto
  • Publication number: 20130223780
    Abstract: The invention relates to a rolling bearing cage (10) having a plurality of loose segments (11, 12, 13, 14) arranged in the circumferential direction, wherein the segments (11, 12, 13, 14) comprise a main body (15) having at least one pocket (16) for receiving rolling bodies (21). According to the invention, at least one play compensating element (17) is arranged circumferentially between two adjacent main bodies (15), and the play compensating element (17) has circumferentially a higher elasticity than a main body (15), and the segments (11, 12, 13, 14) are arranged circumferentially without play at room temperature. The invention further relates to a rolling bearing comprising such a rolling bearing cage.
    Type: Application
    Filed: November 28, 2011
    Publication date: August 29, 2013
    Applicant: Schaeffler Technologies AG & Co. KG
    Inventors: Andreas Mangold, Tobias Muller, Andreas Bierlien
  • Publication number: 20130177270
    Abstract: A bearing system having a shaft which has at least one bearing journal, a needle bearing having a cage (2) and needle rollers (3) accommodated therein being mountable on the bearing journal, and having an outer ring (1) which is inserted into a machine housing. According to the invention, the cage (2), at least on one side axially next to the needle rollers (3), has a mounting bevel (8) or beveled elements, the radial extension of which decreases with increasing distance from the needle rollers (3).
    Type: Application
    Filed: July 6, 2011
    Publication date: July 11, 2013
    Applicant: Schaeffler Technologies AG & Co.KG
    Inventor: Patrick Ullman
  • Publication number: 20130004113
    Abstract: Provided are a retainer for a tapered roller bearing, which can be adapted for various designs without imposing limitations on a design for dimensions of hook portions, a method of manufacturing this retainer, and a tapered roller bearing using this retainer. The retainer for a tapered roller comprises: a radially-smaller-side ring portion (24b); a radially-larger-side ring portion (24a); and a plurality of brace portions (24c) arranged between the radially-smaller-side ring portion and the radially-larger-side ring portion. The retainer is made of a resin and retains tapered rollers (23) in pockets (24d) formed between the brace portions (24c). A hook portion (36) is formed on a radially larger side, and is engaged with a radially larger side of an inner race (21). An outer diameter of each of the pockets (24d) on the radially-smaller-side ring portion side thereof (end diameter of the pocket (24d) on the radially smaller side thereof) is set to be larger than an inner diameter of the hook portion (36).
    Type: Application
    Filed: March 23, 2011
    Publication date: January 3, 2013
    Inventor: Takashi Ueno