Cage Structure Patents (Class 384/572)
  • Patent number: 10760612
    Abstract: A slew bearing includes a stationary bearing ring to be fixed to a base, a moveable bearing ring to be fixed to a moveable object, wherein the stationary bearing ring and the moveable bearing ring are configured to enable rotation of the moveable bearing ring relative to the stationary bearing ring about a rotation axis.
    Type: Grant
    Filed: April 17, 2017
    Date of Patent: September 1, 2020
    Assignee: ITREC B.V.
    Inventors: Wouter Johannes Slob, Hubertus Lourens Leendert Tieleman, Joop Roodenburg, Teunis Van Der Hoek
  • Patent number: 10619671
    Abstract: A rolling-element bearing cage includes a first side ring and a second side ring connected to the first side ring by a plurality of bridges defining a plurality of pockets configured to receive a rolling-element. The first side ring includes a joint at which the first side ring is configured to be opened to increase a diameter of the first side ring, and the first side ring and the second side ring and the plurality of bridges are made of steel and an outer diameter of the second side ring is greater than 500 mm.
    Type: Grant
    Filed: March 20, 2015
    Date of Patent: April 14, 2020
    Assignee: AKTIEBOLAGET SKF
    Inventors: Berthold Beyfuss, Hans-Juergen Friedrich, Sabine Hofmann, Holger Kristandt, Alfred Radina, Jonas Schierling, Gerhard Wagner
  • Patent number: 10378580
    Abstract: To provide a tapered roller bearing provided with a retainer formed of resin capable of being molded by using a simple molding die, and capable of retaining a tapered roller stably when the tapered roller and the retainer are integrated, and capable of improving mechanical strength and lubricating performance on a guide surface as needed. A retainer 5 in the tapered roller bearing is formed of an injection molded body formed by injection molding a resin composition. The retainer 5 includes a large diameter ring portion 5a, a small diameter ring portion 5b, and a column portion 5c which joins both of them. A pocket portion 6 is formed between the column portions adjacent to each other. An injection molding die dividing line X along an axial direction is formed on the column portion 5c.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: August 13, 2019
    Assignee: NTN CORPORATION
    Inventors: Yasuyoshi Hayashi, Takashi Wakisaka
  • Patent number: 10378586
    Abstract: A roller-cage assembly that provides both improved lubrication and reduced contact surface of the cage is disclosed. The roller-cage assembly includes a plurality of rolling elements and a cage. The cage includes a first radial flange, a second radial flange, and a plurality of crossbars extending therebetween that define a plurality of rolling element pockets. The plurality of rolling elements are located in at least some of the plurality of rolling element pockets. The plurality of crossbars each include lateral surfaces that support the plurality of rolling elements. The cage includes a radial support surface that includes at least one recess. The at least one recess serves as a lubrication reservoir as well as provides a reduction in surface area of the radial support surface against an associated support element, such as a housing, shaft, or bearing ring.
    Type: Grant
    Filed: August 21, 2017
    Date of Patent: August 13, 2019
    Assignee: SCHAEFFLER TECHNOLOGIES AG & CO. KG
    Inventor: Edward J. Wey
  • Patent number: 9771980
    Abstract: A rolling bearing retainer which is formed by insert molding a resinous material together with a core member within a mold, in which the core member is embedded within a resin part made of the resinous material and a support area exposure part is provided at a plurality of locations of the resin part for exposing a support area of the core member supported within a cavity of the mold. The resin part includes a ring shaped body and a plurality of support column bodies extending axially from the ring shaped body and defining a pocket for retaining a rolling element therebetween, and the core member is provided with a ring shaped body embedded part and a plurality of support column body embedded parts extending from the ring shaped body embedded part.
    Type: Grant
    Filed: August 3, 2015
    Date of Patent: September 26, 2017
    Assignee: NTN CORPORATION
    Inventors: Tatsuya Hayashi, Mitsuhiro Moriuchi
  • Patent number: 9689423
    Abstract: A cage has a small-diameter annular portion provided between an inner ring and an outer ring on a first side of a bearing in an axial direction and a plurality of cage bars extending from the small-diameter annular portion toward a second side of the bearing in the axial direction. In each of an inner peripheral surface and an outer peripheral surface of the small-diameter annular portion, recessed portions are formed which is each open toward a bearing exterior on the first side of the bearing in the axial direction. An inner wall of each recessed portion has an inclined surface that serves to enlarge a cross section of the recessed portion toward the bearing exterior on the first side of the bearing in the axial direction.
    Type: Grant
    Filed: April 20, 2016
    Date of Patent: June 27, 2017
    Assignee: JTEKT CORPORATION
    Inventor: Akiyuki Suzuki
  • Patent number: 9651089
    Abstract: A single-split cage for holding a plurality of rolling elements stably by eliminating the difference in the strength between split regions, by maintaining the strength of the entire cage uniform in the circumferential direction and by maintaining the dimensional accuracy between the split regions constant at the time of molding. A split section for splitting at one portion in the circumferential direction is formed at regions extending between pockets adjacent to each other in the circumferential direction, engagement sections being engageable with each other are provided at the circumferential central position between the pockets and on a one-side split face and the other-side split face formed by splitting the regions. In a state in which both the engagement sections are engaged with each other, predetermined clearances are formed between the one-side split face and the other-side split face and between the engagement sections.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: May 16, 2017
    Assignee: NSK LTD.
    Inventor: Yutaka Ishibashi
  • Patent number: 9651090
    Abstract: A single-split cage for continuously holding a plurality of rolling elements stably for a long time. A split section for splitting at one portion in the circumferential direction is formed at regions extending between pockets adjacent to each other in the circumferential direction, engagement sections being engageable with each other are provided at the circumferential central position between the pockets and on a one-side split face and the other-side split face formed by splitting the regions, and in a state in which both the engagement sections are engaged with each other, predetermined clearances are formed between the one-side split face and the other-side split face and between the engagement sections.
    Type: Grant
    Filed: February 24, 2015
    Date of Patent: May 16, 2017
    Assignee: NSK LTD.
    Inventor: Yutaka Ishibashi
  • Patent number: 9644677
    Abstract: The occurrence of wear during use in areas of contact between residual protrusions 22a and opposing end surfaces due to residual protrusions 22a that remain on end surfaces in the circumferential direction of retainer elements 15b after shearing of small cross-sectional area sections is prevented. Convex sections 23, the tip ends thereof being flat, are provided on one end surface in the circumferential direction of retainer elements 15 so as to protrude in the circumferential direction.
    Type: Grant
    Filed: February 27, 2014
    Date of Patent: May 9, 2017
    Assignee: NSK Ltd.
    Inventor: Yutaka Ishibashi
  • Patent number: 9562566
    Abstract: A cage includes a pair of annular rings and a plurality of cage bars, and an area enclosed by the pair of annular rings and the circumferentially adjacent cage bars that serves as a pocket that holds the roller. The cage further includes a tab provided so as to protrude from a radially outer area of the cage bars to prevent the roller in the pocket from slipping out through the pocket toward a radially outer side. A surface of a bottom portion of the tab is discontinuous with surfaces of the cage bar, which are located on both sides of the tab in a longitudinal direction.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: February 7, 2017
    Assignee: JTEKT CORPORATION
    Inventor: Hikotsugu Kozaki
  • Patent number: 9482280
    Abstract: A roller bearing retainer is constituted by two or a greater number of circumferentially disposed segments. Each segment includes: a plurality of columns provided between mutually opposing long sides of a rectangle; and a plurality of pockets for holding rollers between the columns. At least one of the mutually opposing long sides of the segment includes an arc-shaped connecting member having a generally U-shaped section for slidable fitting in a circumferential direction. The segments are arranged in the circumferential direction, and under this state, the connecting members of each segment is slid over the long side of the adjacent segment, whereby the segments are mutually connected with each other.
    Type: Grant
    Filed: March 5, 2014
    Date of Patent: November 1, 2016
    Assignee: NTN CORPORATION
    Inventor: Yasuhiro Shimizu
  • Patent number: 9334900
    Abstract: A ball bearing cage with an annular rolling element retaining body, which has ball sockets distributed around a circumference of the rolling element retaining body for receiving spherical rolling elements. The ball sockets are distributed around the circumference, such that distances between two adjacent ball sockets increase in a circumferential direction, starting at a smallest distance between two adjacent sockets at least in a circumferential sector.
    Type: Grant
    Filed: November 26, 2010
    Date of Patent: May 10, 2016
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Aaron Chriss
  • Patent number: 9284982
    Abstract: A cage is made of a magnesium alloy such as AZ91D, and is molded by means of injection molding. In this cage, a confluence region is brought away to outside the cage during the injection molding. The confluence region is a region including a void formed by merging of flows of the magnesium alloy. When observing a cross sectional surface of the cage, a ratio of an ? phase having a grain size of 20 ?m or greater is less than 15% in the magnesium alloy constituting the cage.
    Type: Grant
    Filed: March 9, 2011
    Date of Patent: March 15, 2016
    Assignee: NTN Corporation
    Inventors: Mitsuo Kawamura, Eiichiro Shimazu, Yasutake Hayakawa, Takahiro Okuno, Junichi Ooshimo, Ryuichi Sakamoto
  • Patent number: 9267543
    Abstract: Provided is a cage unit including a cage having a small diameter side annular portion, a large diameter side annular portion arranged so as to be spaced apart in an axial direction from the small diameter side annular portion, and a plurality of cage bar portions that connect the small diameter side annular portion and the large diameter side annular portion; and a tapered roller accommodated in a pocket, which is a space surrounded by the small diameter side annular portion, the large diameter side annular portion, and the cage bar portions. A lubrication groove lying along a circumferential direction is formed on an inner end face of the large diameter side annular portion that faces a roller large end face of the tapered roller, and a circumferential length of the lubrication groove is designed such that the lubrication groove overlaps the roller large end face in the circumferential direction.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: February 23, 2016
    Assignee: JTEKT CORPORATION
    Inventor: Akiyuki Suzuki
  • Patent number: 9217470
    Abstract: A bearing cage for a rolling-element bearing includes a plurality of bearing cage segments configured to receive rolling elements in rolling-element pockets. Also included is at least one assembly wire, and each of the cage segments includes a coupling arrangement configured to thread the bearing cage segment onto the at least one assembly wire such that at least one rolling-element pocket is formed by two of the plurality of bearing cage segments adjacent in the circumferential direction that are threaded on the assembly wire. The bearing cage also includes an assembly device configured to convey an end of the assembly wire from an installation position to an axially far-side coupling arrangement of a bearing cage segment, through the axially far-side coupling arrangement of all bearing cage segments located on a bearing inner ring, and back again towards the installation position.
    Type: Grant
    Filed: December 5, 2012
    Date of Patent: December 22, 2015
    Assignee: AKTIEBOLAGET SKF
    Inventors: Burkard Beck, Holger Kristandt, Winfried Oestreicher, Gerhard Wagner, Juergen Weiglein, Hans-Juergen Friedrich, Alfred Radina
  • Patent number: 9194430
    Abstract: A split cage includes a plurality of cage segments each having a pair of rim portions and a pair of cage bar portions, the cage bar portions and the rim portions defining a single pocket that accommodates a single tapered roller. Turning of each of the cage segments is guided by the tapered roller, the cage segments being arranged in a circular pattern along the circumferential direction of the split cage, in an annular space between inner and outer rings. Each cage segment has projections formed so as to project radially inward from the pocket, and formed at the rim portions. A projecting length of each projection is set to such a length that the projection is brought into contact with an outer peripheral side portion of the inner ring before the cage segment is detached from the tapered roller when the cage segment is displaced to the radially inside.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: November 24, 2015
    Assignee: JTEKT CORPORATION
    Inventor: Hirotaka Yasuda
  • Patent number: 9145917
    Abstract: A cage 7b for a radial roller bearing is achieved that can be manufactured by axial draw molding, and in which end sections 12c that are provided on both sides of a non-continuous section 11a fit together so that relative displacement in the radial direction is possible, and so that relative displacement in the axial direction is not possible. A fitting section 13a where the end sections 12c, 12d fit together comprises an inside fitting piece 17 that is provided in the middle section in the axial direction of one end section 12c, and a pair of outside fitting pieces 18a, 18b that are provided in separated portions on both sides in the axial direction of the other end section 12d so as to not overlap each other with regard to the axial direction.
    Type: Grant
    Filed: October 16, 2012
    Date of Patent: September 29, 2015
    Assignee: NSK Ltd.
    Inventor: Yutaka Ishibashi
  • 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: 9039288
    Abstract: There is provided a resin cage of a tapered roller bearing. The cage includes a small diameter annular portion, a large diameter annular portion, and a plurality of bar portions arranged at intervals in a circumferential direction to connect the annular portions. The bar portion has a pair of circumferentially-directed side surfaces, each having a roller guide surface, and an inner-side inner peripheral surface, a circumferential width of which is smaller on a side of the large diameter annular portion than on a side of the small diameter annular portion, and has a roller retaining region in which a radially outer side pocket width and a radially inner side pocket width between the opposed circumferentially-directed side surfaces of the adjacent bar portions are smaller than a diameter of the roller.
    Type: Grant
    Filed: July 7, 2009
    Date of Patent: May 26, 2015
    Assignee: NSK LTD.
    Inventors: Takumi Takeuchi, Ryosuke Yamada, Kinji Yukawa, Tomoharu Saito, Hiroki Maejima, Kimiko Nakai
  • Patent number: 9033585
    Abstract: A roller bearing cage has a cage element adapted for retaining the generally cylindrically shaped rollers and allowing the rollers to be rollable therein. The cage element includes a main portion having a plurality of pockets, an outward flange portion extending outwardly in a radial direction and an inward flange portion extending outwardly in the radial direction. The outward flange portion is formed on a side edge of the main portion and the inward flange is formed on an opposite side edge portion thereof. The main portion defines the smallest diameter of the bearing cage and is less than the roller pitch diameter.
    Type: Grant
    Filed: September 25, 2013
    Date of Patent: May 19, 2015
    Assignee: Baldor Electric Company
    Inventors: William Gregory Hewitt, Christopher E. Hosmer
  • Patent number: 9022661
    Abstract: A guide piece projects from an outside surface of a cage bar of a cage so as to make sliding contact with a raceway surface of an outer ring. As the cage rotates, the guide piece operates to guide the rotation of the cage while removing an excess grease on the raceway surface and transferring the excess grease to axially opposite ends of the outer ring. The guide piece is formed with a through-hole extending from an inner periphery of the cage to an edge of the guide piece for supplying the lubricant from the inner periphery side of the cage to the raceway surface.
    Type: Grant
    Filed: November 8, 2013
    Date of Patent: May 5, 2015
    Assignee: Jtekt Corporation
    Inventor: Yuichiro Hayashi
  • Publication number: 20150098825
    Abstract: A bearing arrangement, comprising a rolling bearing, which includes an inner ring, an outer ring, rolling elements interposed therebetween, and a cage for holding and separating the rolling elements, wherein the inner ring presents an inner circumferential surface. A shaft is also present, wherein the rolling bearing is mounted on the shaft via the inner circumferential surface of the inner ring. The shaft during operation is meant to oscillate in its axial direction, or is positioned in an angle ? being (90?y) degrees, wherein y is between 0 and 89, or the rolling elements during operation are exposed of an axial force F, and the cage presents means for axially guiding the rolling elements against at least one of the inner ring, the outer ring or a separate element located outside the rolling bearing. The bearing can be integrated into a wind turbine main shaft arrangement.
    Type: Application
    Filed: April 17, 2013
    Publication date: April 9, 2015
    Inventors: Hans Wendeberg, Linus Efraimsson
  • Publication number: 20150098671
    Abstract: A toroidal roller bearing, which comprises an outer ring, an inner ring and a plurality of roller elements interposed between the outer and inner rings, wherein the toroidal roller bearing allows for angular and axial displacement between the outer ring and the inner ring. The bearing includes a cage for holding the roller elements, wherein the cage provides an axial guiding feature for axially guiding the roller elements against at least one of the outer ring, inner ring and a separate element located outside the toroidal roller bearing.
    Type: Application
    Filed: April 17, 2013
    Publication date: April 9, 2015
    Inventors: Hans Wendeberg, Linus Efraimsson
  • Patent number: 8998489
    Abstract: A segment rolling bearing for an axial hydraulic pump, which can be integrated in a simple way. The segment rolling bearing has an outer raceway carrier, an inner raceway carrier, a plurality of rolling bodies, and a cage. The rolling bodies are arranged in the cage such that they roll between the outer raceway carrier and the inner raceway carrier in such a way that the outer raceway carrier can be pivoted about a common pivot axis with respect to the inner raceway carrier. The cage is connected to the inner and/or to the outer raceway carrier directly and captively in at least one connecting region, at least in the radial direction with respect to the common pivot axis.
    Type: Grant
    Filed: June 8, 2010
    Date of Patent: April 7, 2015
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventors: Harald Vornehm, Peter Decker, Michael Pausch, Klaus Drescher
  • 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
  • Publication number: 20150071580
    Abstract: Characteristics of joint sections using rivets 11a that join flat sections 12a, 12b of a pair of cage elements are improved regardless of differences in the volumes of the rivets 11a. A head section 16a and a crimped section 19a of a rivet 11a comprise flange sections 23a, 23b and convex sections 24a, 24b. The inside surfaces of the flange sections 23a, 23b press against the outside surfaces of the flat sections 12a, 12b. The convex sections 24a, 24b have a truncated cone shape with the maximum diameter being on the flange section 23a, 23b side. The diameter d24 of the apex of the convex sections 24a, 24b is equal to or less than the inner diameter R15 of circular holes 15, and the outer diameter D23 of the flange sections 23a, 23b is equal to or greater than the outer diameter D24 of the bottom section of the convex sections 24a, 24b.
    Type: Application
    Filed: April 16, 2013
    Publication date: March 12, 2015
    Inventors: Keita Itagaki, Yuuki Mizushima, Kazuto Kobayashi
  • Patent number: 8974123
    Abstract: A rolling-element bearing cage (12) having two lateral rings (2) and a plurality of cage webs (1), wherein the laterals rings (2) and the cage webs (1) form a plurality of cage pockets (8). In order for the rolling-element bearing cage (12) to have an especially light and stable design, a respective recess (3) is formed in each of the corners (10) of the cage pockets (8). This recess is tapered or reduced toward the radial center (7) of the recess without forming a running surface for the associated rolling element (9). A method for producing the rolling-element bearing cage (12) is also provided, wherein a plurality of cage pockets (8) are milled into a solid cage blank, wherein the corners (10) of the cage pockets (8) are milled in such a way that a respective recess (3) is formed in each of the corners of the cage pockets, which recess is tapered or reduced toward the radial center (7) of the recess without forming a running surface for the associated rolling element (9).
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: March 10, 2015
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Alexander Schulz
  • Patent number: 8967879
    Abstract: A cage for rolling elements of a bearing, which has a plastic base body and a metal coating fixed to the base body and at least partially covering the the base body. The cage provides mechanical stability, wear-resistance and corrosion resistance. This is achieved by the metal, at least sections, having a nanocrystalline granular structure.
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: March 3, 2015
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Wolfgang Braun
  • Patent number: 8961029
    Abstract: Construction of a roller thrust bearing is achieved wherein it is possible to keep a thrust race from coming apart from a cage without wear or cracking occurring in a cage element and without impact occurring between the thrust race and cage even when used in an application wherein a rotating section rotates at high speed, or when used in an application wherein relative displacement between members of a rotating section is large. The thickness of metal plate of a first cage element 35 is preferably ? the thickness of metal plate of a second cage element 36 or less. Alternatively, the thickness of metal plate of a second cage element 56 is preferably ? the thickness of metal plate of a first cage element 55 or less.
    Type: Grant
    Filed: February 2, 2012
    Date of Patent: February 24, 2015
    Assignee: NSK Ltd.
    Inventors: Ryosuke Yamada, Tomoyuki Yokota
  • Publication number: 20150049976
    Abstract: An object of the present invention is to prevent abrasion powder from accumulating and stacking in pockets in a retainer of a roller bearing, thereby protecting the rollers from brinelling and loss of lubrication for extended life of the roller bearing. On an inner diameter surface of annular regions in the retainer, cutouts are formed from the retainer's axially outer side end surface toward an inner side. The cutout has an outer diametrical position on a more radially outer position than an outer diametrical end of the inner-side projection of the retainer. This improves an axial flow of lubricant oil from an inner diameter side of the retainer toward the cutout which is formed in the annular region, making it less likely that dust such as metal abrasion powder contained in the lubricant oil will stay at the inner-side projection of the pillar.
    Type: Application
    Filed: November 22, 2012
    Publication date: February 19, 2015
    Applicant: NTN CORPORATION
    Inventors: Tsutomu Nakagawa, Masashi Nishimura, Shinji Oishi
  • Publication number: 20150049971
    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: Application
    Filed: August 13, 2014
    Publication date: February 19, 2015
    Applicant: AKTIEBOLAGET SKF
    Inventors: Rico Dittmar, Volker Wendt
  • Publication number: 20150043862
    Abstract: A pillar includes a radially outer projection that is formed at the radially outer side of a pillar's wall surface facing a pocket so as to project in the circumference direction and restricts radially outward movement of a roller. A radially inner projection is formed at the radially inner side of the pillar's wall surface facing the pocket so as to project in the circumference direction and restrict radially inward movement of the roller. Allowable distance Lo to which the roller can move radially outward from a pitch circle PCD of the rollers under the restriction of the radially outer projections and allowable distance Li to which the roller can move radially inward from the pitch circle PCD of the rollers under the restriction of the radially inner projections satisfy the relationship Lo>Li. The cage solves the problem that the rollers get caught by the roller retaining elongated projections.
    Type: Application
    Filed: February 25, 2013
    Publication date: February 12, 2015
    Inventor: Shuichi Kajikawa
  • Publication number: 20150043861
    Abstract: A bearing cage for a rolling element bearing assembly, the bearing cage including a cage body having an inner surface defining a bore coaxially aligned with the principal rotational axis of the bearing cage; a plurality of pockets, each pocket being suitable for housing a rolling element of the rolling element bearing assembly, the pockets being arranged sequentially around the cage body with respect to the principal rotational axis of the bearing cage; and a skirt projecting from the cage body in the axial direction; characterized by a flow deflector projecting from the skirt in the radial direction.
    Type: Application
    Filed: July 16, 2014
    Publication date: February 12, 2015
    Inventors: Daren Richard ASHMORE, James Alan PLANT, Steven OPACIC
  • Publication number: 20150030276
    Abstract: A bearing cage, including an outer circumferential surface, an inner circumferential surface, a radial surface aligned in a direction orthogonal to the axis of rotation, at least one chamber located in material forming the bearing cage and one of at least one first channel connecting the at least one chamber to the radial surface and at least one second channel connecting the at least one chamber to one of the inner circumferential surface or the outer circumferential surface, or at least one first channel connecting the at least one chamber to the inner circumferential surface and at least one second channel connecting the at least one chamber to the outer circumferential surface.
    Type: Application
    Filed: July 15, 2014
    Publication date: January 29, 2015
    Inventor: William Moratz
  • Patent number: 8939865
    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: Grant
    Filed: August 30, 2012
    Date of Patent: January 27, 2015
    Assignee: NTN Corporation
    Inventors: Tsutomu Nakagawa, Masashi Nishimura, Shinji Oishi
  • Publication number: 20150023625
    Abstract: Present invention relates to provide a cage suited in particular to a supersized roller bearing, which is easy to improve rigidity, realizes a reduction in manufacturing costs, facilitates dimension management and accuracy management, and is less prone to progress abrasion of end surfaces of rollers. A roller bearing cage (1A) is configured such that a pair of ring parts (4, 6) axially separated from each other is connected by column parts (5) sliding on outer peripheral surfaces of rollers (RA), and pocket holes (P) are evenly formed to store and hold the rollers (RA) in a peripheral wall portion in a circumferential direction. The cage (1A) is manufactured such that a base body (2) including the ring part (4) and the column parts (5) with square columnar convexes (5A) and a connection body (3) including the ring part (6) with square holes (6A) are set as separate members.
    Type: Application
    Filed: March 7, 2013
    Publication date: January 22, 2015
    Applicant: Nakanishi Metal Works CO., LTD
    Inventors: Michiyuki Kamiji, Masaki Okano, Hiroyuki Maeda, Yoshio Kawatake, Kenji Teshima, Yasuki Yabubayashi, Tomomi Hosokawa
  • Patent number: 8905646
    Abstract: A roller bearing comprises an outer ring, an inner ring, a plurality of rollers arranged between the outer ring and the inner ring, and a plurality of retainer segments having a plurality of column parts extending in a direction along a shaft so as to form a pocket for holding the roller, and connection parts and extending in a circumferential direction to connect the plurality of column parts, and continuously lined with each other in the circumferential direction between the outer ring and the inner ring. The column part is positioned at an circumferential end of the retainer segment. Here, a circumferential outer side end face of the column part positioned at the end is flat, and a circumferential inner side end face of the column part positioned at said end is provided with a recess recessed in the circumferential direction to reduce the thickness of the column part.
    Type: Grant
    Filed: November 21, 2012
    Date of Patent: December 9, 2014
    Assignee: NTN Corporation
    Inventors: Tatsuya Omoto, Shoichi Hioki, Mitsuo Sasabe, Eiichi Nakamizo, Tomoya Sakaguchi
  • Patent number: 8899840
    Abstract: A roller inscribed circle R1 diameter of tapered rollers fitted in pockets of a bearing retainer is such that a circle R1 portion protruding radially outwardly of an inner race small flange radially outer surface when the rollers are at radially outermost positions in pockets with an outer race unmounted, and when the circle R1 is offset from a raceway circle center of an inner race raceway end at the flange so as to point contact the raceway circle. The circle R1 portion which does not radially outwardly protrude from the flange outer surface has a central angle >180° and ?240°. Flange thickness is such that when the roller inscribed circle is offset from the raceway circle center to point contact the raceway circle, and swung about the contact point toward the flange, the flange does not interfere with the arcuate locus of the roller inscribed circle swing end.
    Type: Grant
    Filed: June 23, 2011
    Date of Patent: December 2, 2014
    Assignee: NTN Corporation
    Inventor: Yasuhiro Shimizu
  • Publication number: 20140341494
    Abstract: A bearing arrangement for a camshaft and a camshaft are provided. The bearing arrangement includes a bearing point in a bearing support frame that receives a camshaft, a bearing rolling-element cage and a bearing outer sleeve. The rolling-element cage and the outer sleeve are configured such that the outer diameter of the outer sleeve is smaller than the inside diameter of the bearing point and the outer diameter of the rolling-element cage is smaller than the inner diameter of the outer sleeve. The rolling-element cage may be provided with retention features that axially secure the cage to the outer sleeve. The rolling-element cage and/or the outer sleeve may be provided with collars that axially constrain the bearing relative to the support frame. A camshaft including at least one such bearing arrangement is also provided.
    Type: Application
    Filed: December 12, 2012
    Publication date: November 20, 2014
    Inventors: Markus Schuler, Gregor Heitzler
  • Publication number: 20140334762
    Abstract: A roller bearing cage has a cage element adapted for retaining the barrel-shaped rollers and allowing the rollers to be rollable therein. The cage element includes a main portion having a plurality of pockets, an outward flange portion extending outwardly in a radial direction and an inward flange portion extending inwardly in the radial direction. The outward flange portion being formed on a side edge of the main portion and the inward flange being formed on an opposite side edge portion thereof. The outward flange portion includes an outward flange guide surface for guiding barrel-shaped rollers. The guide surface is cylindrical in shape and adjacent each pocket. The guide surface is adapted to abut an axial end of the rollers.
    Type: Application
    Filed: April 25, 2014
    Publication date: November 13, 2014
    Applicant: Baldor Electric Company
    Inventors: William Gregory Hewitt, Christopher E. Hosmer
  • Publication number: 20140334758
    Abstract: A rolling bearing assembly with electrical discharge damage protection is provided. The rolling bearing assembly includes radially inner and outer bearing rings that each have a race. A roller assembly including a plurality of rolling elements that are supported to roll on the races is provided. A shield extends radially between the radially outer ring and the radially inner ring. The shield includes a body portion with one radial end that is fixed to one of the radially inner or outer rings, at least one electrically conductive seal on a surface of the body portion, and a plurality of filaments extending on an opposite radial end of the body portion from the fixed radial end that contacts the other of the radially inner or outer rings.
    Type: Application
    Filed: March 25, 2014
    Publication date: November 13, 2014
    Applicant: Schaeffler Technologies GmbH & Co. KG
    Inventor: Michael WHITE
  • Publication number: 20140334761
    Abstract: A roller bearing cage has a cage element adapted for retaining the generally cylindrically shaped rollers and allowing the rollers to be rollable therein. The cage element includes a main portion having a plurality of pockets, an outward flange portion extending outwardly in a radial direction and an inward flange portion extending outwardly in the radial direction. The outward flange portion is formed on a side edge of the main portion and the inward flange is formed on an opposite side edge portion thereof. The main portion defines the smallest diameter of the bearing cage and is less than the roller pitch diameter.
    Type: Application
    Filed: September 25, 2013
    Publication date: November 13, 2014
    Inventors: William Gregory Hewitt, Christopher E. Hosmer
  • Patent number: 8876397
    Abstract: A liquid lubricating tapered roller bearing device, includes: an outer ring; an inner ring including an outer end surface at a smaller diameter side; tapered rollers; and a cage located further inside in an axial direction than the outer end surface of the inner ring and including an end portion at a smaller diameter side, the end portion defining an outer end surface and an inner periphery. Inequalities X2/B?0.010 and 0.009?X1/D?0.043 are satisfied where B represents a width in the axial direction of the inner ring; D represents a bore diameter of the inner ring; X2 represents a distance in the axial direction from the outer end surface of the inner ring to the outer end surface of the case; and X1 represents a dimension of a clearance in a diameter direction between the inner periphery of the cage and the inner ring.
    Type: Grant
    Filed: November 14, 2006
    Date of Patent: November 4, 2014
    Assignee: JTEKT Corporation
    Inventors: Hiroki Matsuyama, Kazutoshi Toda
  • 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: 20140301688
    Abstract: A prong type cage is incorporated in a double row roller bearing and holds the rollers arranged in one of the two rows. The prong type cage has an annular portion; and multiple cage bars. Pockets in which the rollers are held are defined at positions on a side of the one side face of the annular portion and between the cage bars adjacent to each other in the circumferential direction. Recesses are formed in a face of the annular portion, the face being opposed to end faces of the rollers disposed in the pockets. The recesses are opened toward the end faces of the rollers to retain grease between the recesses and the end faces of the rollers. The recesses are opened at an inner peripheral face of the annular portion to introduce the grease that is present on the inner peripheral face of the annular portion into the recesses.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 9, 2014
    Applicant: JTEKT CORPORATION
    Inventor: Hayaki HONJO
  • Publication number: 20140301689
    Abstract: A prong type cage includes an annular portion, and a plurality of cage bars extended in the axial direction of the prong type cage from one side face of the annular portion, and located at intervals in the circumferential direction of the prong type cage. Pockets in which the rollers are held are defined at positions on a side of the one side face of the annular portion and between the cage bars adjacent to each other in the circumferential direction. A plurality of protrusions each of which is opposed to an inner peripheral face of the outer ring across a clearance and guided by the inner peripheral face, and a plurality of recessed portions that retain grease between the recessed portions and the inner peripheral face are formed on an outer periphery of the annular portion so as to be arranged in the circumferential direction.
    Type: Application
    Filed: March 28, 2014
    Publication date: October 9, 2014
    Applicant: JTEXT CORPORATION
    Inventor: Hayaki HONJO
  • Patent number: 8834035
    Abstract: A roller bearing retainer (13) includes a pair of annular ring parts (14) and a plurality of column parts (15) each including a column center part (16) provided in an axial center region so as to be positioned relatively on the radial inner side, a pair of column end parts (17) provided in axial end regions so as to be positioned relatively on the radial outer side, and a pair of column sloped parts (18) positioned between the column center part (16) and the pair of column end parts (17), and connecting the pair of ring parts to each other. A thickness of each part of the column center part, the pair of column end parts, and the pair of column sloped parts is smaller than a thickness of a boundary part between the adjacent parts.
    Type: Grant
    Filed: December 19, 2008
    Date of Patent: September 16, 2014
    Assignee: NTN Corporation
    Inventors: Shinji Oishi, Yugo Yoshimura, Katsufumi Abe
  • Publication number: 20140254971
    Abstract: In the cage 10 of a cylindrical roller bearing 1 according to the invention, a pocket for storing a cylindrical roller 4 is constituted of circumferential-direction side surfaces 23, 23 of two pillar portions 16, 16 mutually adjoining in the circumferential direction opposed to each other in the circumferential direction and axial-direction side surfaces 26, 26 opposed to each other in the axial direction of a pair of annular portions 12, 12. The circumferential-direction side surfaces 23, 23 include circumferential-direction projecting curved surface portions 28, 28 formed by crowning, while the axial-direction side surfaces 26, 26 include axial-direction projecting curved surface portions 26, 26 formed by crowning.
    Type: Application
    Filed: October 5, 2012
    Publication date: September 11, 2014
    Applicant: NSK LTD.
    Inventor: Kenji Shimizu
  • Patent number: 8827565
    Abstract: A roller bearing cage 16 with roller bearing pockets 18 which are arranged one next to the other in the circumferential direction and have the purpose of holding load-bearing roller bodies 10 of a roller bearing, wherein at least one end piece 14 which engages behind a roller bearing component 12 is formed on the roller bearing cage 16. The end piece 14, which is ideally embodied as a retaining claw, holds the inner ring and the roller body 10 together, but can be removed after or during the assembly by means of a predetermined rupture point 15, in order to make room for a further component, such as for example a sealing arrangement. As a result, despite the installation assistance, optimum use of the installation space is provided.
    Type: Grant
    Filed: November 15, 2011
    Date of Patent: September 9, 2014
    Assignee: Schaeffler Technologies AG & Co. KG
    Inventor: Marc-Andre Schaefer
  • Patent number: 8821026
    Abstract: A double roller cage for a double-row cylinder roller bearing, with a central ring part (1) from which webs (2, 3) protrude axially on both sides, wherein the webs (2; 3) of one side in each case form a row of bearings (4; 5) together with the rolling bodies arranged therein, wherein every two adjacent webs (2; 3) of a row of bearings (4; 5) delimit a receiving pocket (6; 7) for a rolling body, and in which, at least in one row of bearings (5), the webs (3) are designed so as to taper in the circumferential direction for a radial filling of the receiving pockets (7) with the rolling bearings. So that the double roller cage has satisfactory running behavior and is relatively simple and cost-effective to produce, recesses (12, 12?, 13, 14, 16) are formed on the other of the two rows of bearings (4; 5) in order to produce a symmetrical mass distribution between the two rows of bearings (4; 5).
    Type: Grant
    Filed: August 1, 2011
    Date of Patent: September 2, 2014
    Assignee: Schaeffler Technologies GmbH & Co. KG
    Inventors: Karl Muller, Werner Roman