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WO2005119074A1 - Roulement a galets - Google Patents

Roulement a galets Download PDF

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Publication number
WO2005119074A1
WO2005119074A1 PCT/IB2005/001604 IB2005001604W WO2005119074A1 WO 2005119074 A1 WO2005119074 A1 WO 2005119074A1 IB 2005001604 W IB2005001604 W IB 2005001604W WO 2005119074 A1 WO2005119074 A1 WO 2005119074A1
Authority
WO
WIPO (PCT)
Prior art keywords
rollers
receptacles
rods
teeth
bearing according
Prior art date
Application number
PCT/IB2005/001604
Other languages
English (en)
Inventor
Francescantonio Melara
Original Assignee
Emilsider Meccanica S.P.A.
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 Emilsider Meccanica S.P.A. filed Critical Emilsider Meccanica S.P.A.
Publication of WO2005119074A1 publication Critical patent/WO2005119074A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
    • F16C33/4641—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages comprising two annular parts joined together
    • F16C33/4652—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages comprising two annular parts joined together made from plastic, e.g. two injection moulded parts joined by a snap fit
    • 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
    • F16C33/49—Cages for rollers or needles comb-shaped
    • F16C33/494—Massive or moulded comb cages
    • F16C33/495—Massive or moulded comb cages formed as one piece cages, i.e. monoblock comb cages
    • F16C33/498—Massive or moulded comb cages formed as one piece cages, i.e. monoblock comb cages made from plastic, e.g. injection moulded comb cages
    • 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

Definitions

  • the present invention relates to a rolling bearing particularly suitable to facilitate the mutual sliding of the wheel and the hub in wheels of furniture, chairs and other furnishing or utility items.
  • Background art Wheels for pieces of furniture and chairs are generally made of plastic material having good chemical properties. However, this material does not ensure sufficiently easy sliding if the wheel must bear heavy loads.
  • materials known as self-lubricating have been proposed. However, these materials are expensive and do not have mechanical characteristics suitable for bearing heavy loads.
  • the use of conventional bearings would be convenient in order to improve the sliding of the wheels.
  • the use of metallic bearings is not suitable due to reasons of cost and weight in addition to the structural complexity that the wheel would have.
  • Bearings made of plastic material are also known for example from US-5,068,943 and US-5,230,571. These known bearings comprise an annular cage in which there are receptacles for accommodating the rollers.
  • the constructive simplicity of these known bearings is compromised by the fact that they are not available for fitting as a single unit but have to be assembled during fitting, with labor-intensive operations.
  • said bearings require auxiliary elements. Disclosure of the invention The aim of the present invention is to obviate the above-mentioned requirements and drawbacks, by providing a rolling bearing that is easy to provide and assemble.
  • a rolling bearing of the type that comprises an annular support from which a plurality of equidistant rods protrude axially, said rods forming, between them, respective receptacles for accommodating rollers, said receptacles being open radially and said rods having a radial thickness that is smaller than the diameter of said rollers, so that said rollers protrude on opposite sides of said receptacles, characterized in that said receptacles have an inlet for the insertion of said rollers which is provided with means for retaining said rollers in the respective receptacles.
  • Figure 1 is a perspective view of a rolling bearing according to the invention
  • Figure 2 is a front view of the bearing of Figure 1
  • Figure 3 is an exploded perspective view of the bearing of Figure 1
  • Figure 4 is an enlarged-scale sectional view of the detail enclosed in the circle of Figure 1
  • Figure 5 is an exploded perspective view of a second embodiment of the bearing according to the invention
  • Figure 6 is an exploded perspective view of a third embodiment of the bearing according to the invention
  • Figure 7 is a sectional view of the embodiment of Figure 6.
  • the reference numeral 1 generally designates a bearing.
  • the bearing 1 comprises an annular support 2, which is composed of a flat circular ring 3, which is made monolithically of plastic material and has a plurality of rods 4 that protrude axially from it.
  • the rods 4 are parallel to the axis of symmetry of the ring 3 and are arranged so as to form a sort of crown with said ring.
  • the rods 4 are mutually spaced by recesses, which form receptacles 5 that are designed to receive the rolling elements of the bearing, which are constituted by rollers 6.
  • the receptacles 5 are formed in practice by cylindrical sectors, which are formed in the opposite faces of the rods 4 and have such a diameter as to accommodate the rollers 6 without appreciable friction. Moreover, the radial thickness of the rods is lower than the diameter of the rollers 6, which accordingly protrude inward and outward in order to engage mutually opposite rolling tracks provided on the hub and on the wheel.
  • the receptacles 5 are also longer than the rollers 6, so that the rods 4 protrude axially with their end portions beyond the ends of the rollers.
  • Said end portions are divided by radial slots 7, so as to form two wings 8 and 9, which form the inlet 10 of the receptacles 5 and are provided centrally with respective teeth 11 on the faces directed toward the receptacle 5.
  • the teeth 1 1 lie on tangential planes and have a trapezoidal shape.
  • the wings 8 and 9, by way of the slot 7 that separates them, have a certain flexibility, which allows the mutually opposite teeth 11 to move mutually apart and therefore makes it easier to insert the rollers 6 in the receptacles 5.
  • FIG. 5 illustrates a second embodiment, which differs from the preceding one in that the ends of the rods 4 do not have the slots 7.
  • the rollers are inserted by forcing in the receptacles 5 and their retention therein is ensured conveniently by two pairs of teeth 13 and 14, which are formed proximate to the edges of the opposite faces of each rod and are arranged opposite identical pairs of teeth formed along the edges of the adjacent rods.
  • Figures 6 and 7 illustrate a third embodiment, in which the axial retention of the rollers 6 in the receptacles 5 is provided by means of a ring 15, which is provided with an annular flange 16, which enters slots 17 provided tangentially in the ends of the rods 6.
  • the flange 16 is provided conveniently with a collar 18, which is suitable to engage in a groove 19 of the slots.

Landscapes

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

Abstract

L'invention concerne un roulement à galets du type qui comprend un support annulaire (2) prolongé axialement par une pluralité de tiges (4) équidistantes. Les tiges (4) forment entre elles des réceptacles respectifs (5) destinés à recevoir des galets (6). Les réceptacles sont ouverts radialement et les tiges présentent une épaisseur radiale inférieure au diamètre des galets, si bien que les galets font saillie sur des côtés opposés des réceptacles (5) présentant un orifice d'entrée (10) d'insertion des galets munis de moyens de retenue des galets dans les réceptacles respectifs.
PCT/IB2005/001604 2004-06-01 2005-05-30 Roulement a galets WO2005119074A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITBO2004A000353 2004-06-01
ITBO20040353 ITBO20040353A1 (it) 2004-06-01 2004-06-01 Cuscinetto ad elementi volventi

Publications (1)

Publication Number Publication Date
WO2005119074A1 true WO2005119074A1 (fr) 2005-12-15

Family

ID=34970596

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2005/001604 WO2005119074A1 (fr) 2004-06-01 2005-05-30 Roulement a galets

Country Status (2)

Country Link
IT (1) ITBO20040353A1 (fr)
WO (1) WO2005119074A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8561258B2 (en) 2009-06-09 2013-10-22 Oconomowoc Mfg. Corp. Hubless caster technology
EP2706247A1 (fr) * 2011-05-06 2014-03-12 Aesculap Ag Instrument chirurgical, pièce à main chirurgicale et système d'entraînement chirurgical
US9168689B2 (en) 2012-06-08 2015-10-27 Ngs Capital Management, Llc Durable, quiet hubless caster technology
US11498360B2 (en) 2019-05-21 2022-11-15 Ngs Capital Management, Llc Hybrid bearing arrangement caster technology
US12030341B2 (en) 2017-11-27 2024-07-09 Omco Sumo, Inc. Caster braking system technology

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1640444U (de) * 1952-04-21 1952-07-03 Schaeffler Ohg Industriewerk Kaefig fuer rollen- und nadellager.
CH384952A (de) * 1959-03-06 1965-02-26 Skf Svenska Kullagerfab Ab Rollenkäfig für Zylinderrollenlager
FR1573626A (fr) * 1967-07-12 1969-07-04
GB1194294A (en) * 1967-07-12 1970-06-10 Volkswagenwerk Ag A Cage of Plastics Material for Needle Bearings.
FR2460416A1 (fr) * 1979-06-29 1981-01-23 Nadella Cage de retenue du type peigne et roulements munis d'une telle cage
JPS59155622A (ja) * 1983-02-22 1984-09-04 Koyo Seiko Co Ltd コロ軸受用プラスチツク製保持器
US5743660A (en) * 1996-02-09 1998-04-28 Skf Gmbh Cage for roller bearing assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1640444U (de) * 1952-04-21 1952-07-03 Schaeffler Ohg Industriewerk Kaefig fuer rollen- und nadellager.
CH384952A (de) * 1959-03-06 1965-02-26 Skf Svenska Kullagerfab Ab Rollenkäfig für Zylinderrollenlager
FR1573626A (fr) * 1967-07-12 1969-07-04
GB1194294A (en) * 1967-07-12 1970-06-10 Volkswagenwerk Ag A Cage of Plastics Material for Needle Bearings.
FR2460416A1 (fr) * 1979-06-29 1981-01-23 Nadella Cage de retenue du type peigne et roulements munis d'une telle cage
JPS59155622A (ja) * 1983-02-22 1984-09-04 Koyo Seiko Co Ltd コロ軸受用プラスチツク製保持器
US5743660A (en) * 1996-02-09 1998-04-28 Skf Gmbh Cage for roller bearing assembly

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 009, no. 003 (M - 349) 9 January 1985 (1985-01-09) *

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8561258B2 (en) 2009-06-09 2013-10-22 Oconomowoc Mfg. Corp. Hubless caster technology
EP2706247A1 (fr) * 2011-05-06 2014-03-12 Aesculap Ag Instrument chirurgical, pièce à main chirurgicale et système d'entraînement chirurgical
US9168689B2 (en) 2012-06-08 2015-10-27 Ngs Capital Management, Llc Durable, quiet hubless caster technology
US10035376B2 (en) 2012-06-08 2018-07-31 Ngs Capital Management, Llc Durable quiet hubless caster technology
US12030341B2 (en) 2017-11-27 2024-07-09 Omco Sumo, Inc. Caster braking system technology
US11498360B2 (en) 2019-05-21 2022-11-15 Ngs Capital Management, Llc Hybrid bearing arrangement caster technology

Also Published As

Publication number Publication date
ITBO20040353A1 (it) 2004-09-01

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