WO2016096431A1 - Distribution de lubrifiant dans un roulement à rouleaux - Google Patents

Distribution de lubrifiant dans un roulement à rouleaux Download PDF

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Publication number
WO2016096431A1
WO2016096431A1 PCT/EP2015/078329 EP2015078329W WO2016096431A1 WO 2016096431 A1 WO2016096431 A1 WO 2016096431A1 EP 2015078329 W EP2015078329 W EP 2015078329W WO 2016096431 A1 WO2016096431 A1 WO 2016096431A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
lubricant
distribution element
lubricant distribution
cage
Prior art date
Application number
PCT/EP2015/078329
Other languages
English (en)
Inventor
Stellario Barbera
Jos Holsnijders
Original Assignee
Aktiebolaget Skf
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aktiebolaget Skf filed Critical Aktiebolaget Skf
Publication of WO2016096431A1 publication Critical patent/WO2016096431A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/4611—Cages for rollers or needles with hybrid structure, i.e. with parts made of distinct materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/37—Loose spacing bodies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/37—Loose spacing bodies
    • F16C33/372—Loose spacing bodies rigid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
    • F16C33/4682—Details of individual pockets, e.g. shape or roller retaining means of the end walls, e.g. interaction with the end faces of the rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/50—Cages for rollers or needles formed of interconnected members, e.g. chains
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6629—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
    • F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/70—Positive connections with complementary interlocking parts
    • F16C2226/74—Positive connections with complementary interlocking parts with snap-fit, e.g. by clips
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
    • F16C33/4676—Details of individual pockets, e.g. shape or roller retaining means of the stays separating adjacent cage pockets, e.g. guide means for the bearing-surface of the rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F16C33/6614—Retaining the grease in or near the bearing in recesses or cavities provided in retainers, races or rolling elements

Definitions

  • the present invention relates to a lubricant distribution element for a roller bearing. More ' particular, the present invention relates to a lubricant distribution element for improving the lubrication of a roller bearing.
  • the present invention provides a lubricant distribution element for use in a roller bearing comprising a cage, which lubricant distribution element is configured for being mounted on the cage adjacent to an end surface of a roller and for guiding lubricant towards an edge of the roller during operation of the bearing.
  • the lubricant collecting on the end surface of the roller will be moved towards the roller's edge and therefore towards the roller's side surface. In this way, the lubricant in the bearing is re-distributed and used more effectively.
  • the lubricant distribution element may be mounted in various ways, it is preferred that it is configured for snap-fitting onto the cage.
  • the cage may have a section suitable for mounting the lubricant distribution element.
  • the lubricant distribution element may be directly snap-fitted onto a wire section extending over the end surface of a roller.
  • a wire cage may have various designs, for example a meandering wire case as disclosed in United States Patent US1389385.
  • the lubricant distribution element may advantageously be arranged for being able to swivel relative to the cage, for example swivel about the part if the cage on which it is mounted.
  • the lubricant distribution element is provided with a lubricant guiding surface which extends, in the plane of the end surface of the roller, away from the rotational axis of the roller.
  • a lubricant guiding surface which extends away from the rotational axis of the roller, that is, beyond the rotational axis, will urge, due to the rotation of the roller, any lubricant towards the roller's edge and hence to the roller's side surface.
  • the lubricant guiding surface is bordered, at an edge furthest from the roller, by a protruding ridge extending in parallel with an end surface of the roller.
  • the lubricant distribution element may be made of a synthetic polymeric material, for example but not limited to nylon or ultra-high-molecular-weight polyethylene (UHMWPE).
  • the lubricant distribution element may be made by injection moulding, for example, but may also be made by additive manufacturing (also known as 3D printing).
  • the present invention also provides a roller bearing comprising a cage and rollers, provided with a lubricant distribution element as described above.
  • a roller bearing according to the present invention may further comprise separators for separating the rollers, the separators being provided with flanges for collecting lubricant from the end surface of the rollers and urging the collected lubricant towards a side surface of the rollers.
  • Such separators are particularly advantageous as they cooperate with the lubricant distribution elements to distribute the lubricant and transport it to the side surfaces of the rollers.
  • the flanges may be designed to extend over the respective end surface of a roller so as to have a spacing relative to the roller which decreases in the direction of revolution of the roller. This provides an even better lubricant distribution as the decreasing spacing in the direction of the rotation assists in urging the lubricant towards the side surfaces of the rollers.
  • a wire cage is a cage comprising a meandering wire constituting an interrupted first ring, an interrupted second ring and connecting sections extending between the interrupted rings, the connecting sections defining spaces for receiving rollers of the roller bearing.
  • the present invention also provides a wheel provided with a bearing as described above.
  • Fig. 1 schematically shows, in perspective, a roller bearing suitable for mounting lubricant distribution elements according to the present invention.
  • Fig. 2 schematically shows, in perspective, part of the roller of Fig. 1 provided with a lubricant distribution element according to the present invention.
  • Fig. 3 schematically shows, in side view, a lubricant distribution element according to the present invention.
  • Fig. 4 schematically shows, in perspective, a lubricant distribution element according to the present invention with one roller.
  • Fig. 5 schematically shows, in side view, a separator for use with the lubricant distribution element according to the present invention with a roller.
  • the bearing 1 illustrated in the cutaway view of Fig. 1 comprises an inner race 2, an outer race 3, a cage 4, rollers 5 and a seal 7. Part of the outer race 3 and of the seal 7 is not shown in Fig. 1 to better illustrate the rollers 5 and the cage structure 4.
  • the cage 4 is shown to be constituted by a meandering wire and is provided with separators 6.
  • the meandering wire is shown to constitute an interrupted first ring, an interrupted second ring and connecting sections extending between the two interrupted rings.
  • the interrupted or partial rings are parallel to each other, while the connecting sections extend substantially perpendicularly relative to the planes of the rings.
  • the meandering shape of the wire provides spaces for accommodating the rollers 5.
  • the rollers 5 are separated by the separators 6 which also space the meandering wire apart from the rollers. In the embodiment of Fig. 1, therefore, there is no direct contact between the cage 4 and the rollers 5, thus avoiding friction.
  • the separators 6 are preferably to the wire 4 by way of snap fittings. These snap fittings allow the separators 6 to swivel relative to the wire cage, thus allowing the cage some flexibility to adapt to pressure exerted by the rollers and thereby to further reduce friction. In addition, the snap fittings allow the separators to be easily mounted and removed. This is particularly advantageous when one or more separators have to be replaced. It further allows all separators to be replaced so as to adapt the cage to rollers having a different shape and/or different dimensions.
  • the separators may be designed to match the shape and dimensions of the rollers, and different separators may be provided to fit different rollers. Instead of the cylindrical rollers shown in Figs. 1, tapered rollers may for example be provided, together with matching separators.
  • a bearing for example the bearing 1 of Fig. 1, may in accordance with the present invention be provided with one or more lubricant distribution elements, as illustrated in Fig. 2.
  • the lubricant distribution element 8 is in the present embodiment mounted on the wire cage 4 by means of a snap-fit. As can be seen, the lubricant distribution element 8 is mounted approximately at the rotational axis of the roller 5 and extends beyond that axis.
  • the lubricant distribution element 8 is shown to be shaped so as to guide lubricant away from the rotational axis, towards the edge of the end surface 52 of the roller 5.
  • the lubricant distribution element 8 is substantially pointed, however, more rounded embodiments can also be envisaged.
  • a flange 64 of a separator 6 As will later be explained in more detail with reference to Fig. 5.
  • the flange 64 collects the lubricant from the edge of the end surface 52 and guides it towards the side surface 51.
  • the lubricant distribution element 8 can also be used without a separator 6 having suitably shaped flanges 64, but that the lubricant distribution effect of the element 8 is enhanced by such a separator. Accordingly, it is preferred that a lubricant distribution element 8 cooperates with a suitably shaped separator 6.
  • the lubricant distribution element 8 has a keyhole-shaped opening 88 for receiving, and snap-fitting onto, the cage (4 in Figs. 1 & 2).
  • the lubricant distribution element 8 further comprises a lubricant guiding surface 81 which is bordered by a protruding ridge or flange 82.
  • the protruding ridge 82 extends in parallel with and over the end surface (52 in Fig. 2) of a roller. As the ridge 82 is located at the edge of the guiding surface which is furthest away from the corresponding roller, the lubricant will be contained between the ridge 82 and the end surface of the roller, thus enhancing the lubrication distribution.
  • the perspective view of Fig. 4 also shows the keyhole-shaped opening 88, the lubricant guiding surface 81 and the protruding ridge 82.
  • the guiding surface 81 is substantially pointed, having slightly concave surface parts, but in other embodiments the guiding surface may be more rounded, or have straight surface parts.
  • the separator 6 of Fig. 5 is provided with flanges 64 for collecting and distributing lubricant. As shown in Figs. 2 and 5, these flanges extend beyond the rollers and collect lubricant from the top/bottom end surfaces 52 of the rollers 5, as indicated by the arrow D. In addition, these flanges 64 are shaped so as to move lubricant from the end surface 52 of a roller, via the roller edge 53 to the roller's side surface 51.
  • the flanges 64 of the separator 6 extend partly over the top end surfaces 52 to collect lubricant which has collected there.
  • the flanges 64 have a distance to the top end surface 52 which varies in the rotational direction of the roller 5 so as to provide a funnel for collecting and guiding lubricant.
  • the funnel-shaped flanges 64 may force collected lubricant into channels formed between the separator 6 and the roller 5, which channels lead towards the side surface 51 of the roller so as to redistribute lubricant and bring it to the side surface.
  • the lubricant distribution elements 8 of the present invention are preferably made of plastic, such as UHMWPE, but may also be made of other materials. They may be made by injection molding or by additive manufacturing.
  • the present invention is based upon the insight that the lubrication of a roller bearing can be significantly improved by providing lubricant distribution elements which are designed to move lubricant towards the side surface of the roller.
  • the present invention benefits from the further insight that a lubricant distribution element may advantageously be mounted on a wire section of a bearing cage, and that using a snap-fit allows the lubricant distribution element to be easily installed and removed, and further allows the element a limited freedom to move and thereby to self-adjust.

Landscapes

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

Abstract

La présente invention concerne un élément de distribution de lubrifiant (8) conçu pour être utilisé dans un roulement à rouleaux (1) comportant une cage (4). L'élément de distribution de lubrifiant (8) est configuré pour être monté sur la cage (4) adjacent à une surface d'extrémité (52) d'un rouleau (5) et pour guider du lubrifiant en direction d'un bord du rouleau lors du fonctionnement du roulement.
PCT/EP2015/078329 2014-12-15 2015-12-02 Distribution de lubrifiant dans un roulement à rouleaux WO2016096431A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1422291.3 2014-12-15
GB1422291.3A GB2533302A (en) 2014-12-15 2014-12-15 Lubricant distribution in a roller bearing

Publications (1)

Publication Number Publication Date
WO2016096431A1 true WO2016096431A1 (fr) 2016-06-23

Family

ID=54754675

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/078329 WO2016096431A1 (fr) 2014-12-15 2015-12-02 Distribution de lubrifiant dans un roulement à rouleaux

Country Status (2)

Country Link
GB (1) GB2533302A (fr)
WO (1) WO2016096431A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018205495A1 (de) * 2018-04-11 2019-10-17 Minebea Mitsumi Inc. Wälzlager mit einem ringförmigen Wälzlagerkäfig

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2069628A (en) * 1980-02-20 1981-08-26 Timken Co Angular contact rolling bearing cage
EP0750125A1 (fr) * 1995-06-20 1996-12-27 The Torrington Company Cage pour roulement
US20130301970A1 (en) * 2011-02-09 2013-11-14 Jtekt Corporation Wheel rolling bearing unit
EP2664807A2 (fr) * 2012-05-18 2013-11-20 Jtekt Corporation Cage segmentée pour roulement

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1921333B1 (fr) * 2005-09-01 2013-04-03 NTN Corporation Palier à rouleaux
WO2007069392A1 (fr) * 2005-12-16 2007-06-21 Ntn Corporation Roulement à rouleaux
US7438474B2 (en) * 2006-03-28 2008-10-21 Hiwin Technologies Corp. Spacer structure for cross rollers
DE102011004374A1 (de) * 2011-02-18 2012-08-23 Aktiebolaget Skf Lagerkäfigsegment, Lagerkäfig und Verfahren zur Herstellung desselben
DE102013207301A1 (de) * 2013-04-23 2014-10-23 Schaeffler Technologies Gmbh & Co. Kg Wälzkörperführungselement, insbesondere für ein Kegelrollen-Großwälzlager

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2069628A (en) * 1980-02-20 1981-08-26 Timken Co Angular contact rolling bearing cage
EP0750125A1 (fr) * 1995-06-20 1996-12-27 The Torrington Company Cage pour roulement
US20130301970A1 (en) * 2011-02-09 2013-11-14 Jtekt Corporation Wheel rolling bearing unit
EP2664807A2 (fr) * 2012-05-18 2013-11-20 Jtekt Corporation Cage segmentée pour roulement

Also Published As

Publication number Publication date
GB2533302A (en) 2016-06-22

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