WO2011103921A1 - Dispositif de palier de poussée axiale doté d'une bague d'étanchéité - Google Patents

Dispositif de palier de poussée axiale doté d'une bague d'étanchéité Download PDF

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Publication number
WO2011103921A1
WO2011103921A1 PCT/EP2010/052402 EP2010052402W WO2011103921A1 WO 2011103921 A1 WO2011103921 A1 WO 2011103921A1 EP 2010052402 W EP2010052402 W EP 2010052402W WO 2011103921 A1 WO2011103921 A1 WO 2011103921A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover
sealing ring
bottom support
axial
support cover
Prior art date
Application number
PCT/EP2010/052402
Other languages
English (en)
Inventor
Samuel Viault
Richard Corbett
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
Priority to PCT/EP2010/052402 priority Critical patent/WO2011103921A1/fr
Publication of WO2011103921A1 publication Critical patent/WO2011103921A1/fr

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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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/10—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for axial load mainly
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/02—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring
    • B60G15/06—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper
    • B60G15/067—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit
    • B60G15/068—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having mechanical spring and fluid damper characterised by the mounting on the vehicle body or chassis of the spring and damper unit specially adapted for MacPherson strut-type suspension
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/761—Sealings of ball or roller bearings specifically for bearings with purely axial load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/10—Mounting of suspension elements
    • B60G2204/12—Mounting of springs or dampers
    • B60G2204/128—Damper mount on vehicle body or chassis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
    • B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
    • B60G2204/418—Bearings, e.g. ball or roller bearings
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/01—Parts of vehicles in general
    • F16C2326/05—Vehicle suspensions, e.g. bearings, pivots or connecting rods used therein

Definitions

  • the present invention relates to the field of axial thrust bearing devices, used in particular on motor vehicles in the suspension struts of the steered road wheels.
  • a suspension thrust bearing device is usually provided with a rolling bearing comprising a top ring and a bottom ring between which are positioned rolling elements, for example balls or rollers, and with bottom and top bearing or support pieces, such as covers or cups.
  • the top and bottom covers form a housing for the rings of the ro lling bearing and provide the interface between said rings and the neighboring elements .
  • a suspension thrust bearing device is positioned in the top part of the suspension strut between the bodywork of the vehicle and a suspension spring.
  • the spring is fitted around a damping piston rod, the end of which is linked to the bodywork of the vehicle through an elastic block that filters the vibrations .
  • the suspension spring axially bears, directly or indirectly, on the bottom cover.
  • the top cover is fixed relative to the bodywork of the vehicle.
  • the rolling bearing makes it possible to transmit axial forces between the suspension spring and the bo dywork of the vehicle, while allowing a rotation movement between the bottom cover and the filtering elastic block.
  • This relative angular movement derives from a steer angle of the steered road wheels of the vehicle and/or the compression o f the suspension spring.
  • the French patent application FR-A1 -2 9 1 8 138 disclo ses such a suspension thrust bearing device comprising a bottom support cover, a top bearing cover and a rolling bearing axially disposed between said covers.
  • the device further comprises sealing rings mounted into radial grooves of the bottom support cover and coming into friction contact with external and internal skirts o f the top bearing cover.
  • the European patent application EP-Al - 1 870 265 also disclo ses a suspension thrust bearing device comprising a bottom support cover, a top bearing cover, a rolling bearing and sealing rings axially disposed between said covers.
  • the sealing rings are moveable both axially and radially between the covers .
  • the top bearing cover in order to axially retain the covers relative to one another before the installation o f the device in the top part of the suspension strut, is provided with a plurality o f hooks disposed on an external skirt and extending radially inwards in order to cooperate with corresponding hooks of the bottom support cover.
  • the bottom and top covers are usually obtained by moulding plastic materials.
  • moulding plastic materials usually obtained by moulding plastic materials.
  • hooks on each of the covers it is necessary to foresee production moulds having moveable slides to strip the moulded parts. This leads to a complex structure of the moulds as well as an increase of the overall cost of the suspension thrust bearing device.
  • One aim of the present invention is therefore to overcome the aforementioned drawbacks .
  • the axial thrust bearing device in particular for the suspension strut of a motor vehicle, comprises a bottom support cover, a top bearing cover, and a rolling bearing axially disposed between said covers.
  • the device further comprises at least a sealing ring which is freely movable in axial direction relative to the bottom support cover and to the support bearing cover. Said ring is adapted to reduce any ingress of foreign matter between said covers.
  • the sealing ring comprises first and second axial retaining means respectively adapted to cooperate with the bottom support cover and the top bearing cover to axially retain said covers one relative to the other.
  • the ro lling bearing may comprise a bottom ring in contact with the bottom support cover, a top ring in contact with the top bearing cover and at least one row of rolling elements mounted between the rings.
  • the first axial retaining means comprises at least one protrusion extending towards the bottom support cover and able to interfere diametrically with at least one complementary protrusion of said cover in order to axially retain the bottom support cover relative to the sealing ring.
  • the second axial retaining means may comprise at least one protrusion extending towards the top bearing cover and able to interfere diametrically with at least one complementary protrusion o f said cover in order to axially retain the top bearing cover relative to the sealing ring.
  • the protrusion of the sealing ring is axially separated from the corresponding protrusion o f the cover by an axial gap .
  • the protrusion of the sealing ring extends towards the cover to form a labyrinth seal.
  • the sealing ring is resting axially on the bottom support cover.
  • the sealing ring is freely movable in radial direction relative to the bottom support cover and to the top bearing cover.
  • the sealing ring leaves a radial gap between said ring and the bottom support cover.
  • the sealing ring is radially disposed between the bottom support cover and the top bearing cover.
  • the sealing ring may be radially disposed between the bottom support cover and an external skirt of the top bearing cover.
  • the sealing ring is radially disposed between the bottom support cover and an internal skirt of the top bearing cover.
  • the sealing ring radially surrounds the bottom support cover and the top bearing cover.
  • the sealing ring is disposed inside the bores of the bottom support cover and of the top bearing cover.
  • first and second axial retaining means are annular.
  • the first and second axial retaining means may be distinct.
  • the sealing ring is made in one part.
  • the sealing ring may be made from plastic material or from metal.
  • a suspension strut for a motor vehicle comprising a damper and an axial thrust bearing device as previously defined.
  • FIG. 1 is a view in axial section o f an axial thrust bearing device according to a first example o f the invention
  • FIG. 2 is a view o f a sealing ring o f the device o f Figure 1 ,
  • FIG. 3 is a view in axial section o f an axial thrust bearing device according to a second example o f the invention
  • - Figure 4 is a view o f a sealing ring o f the device o f Figure 3
  • - Figure 5 is a view in axial section o f an axial thrust bearing device according to a third example o f the invention
  • - Figure 6 is a view o f a sealing ring o f the device o f Figure 5
  • - Figure 7 is a view in axial section o f an axial thrust bearing device according to a fourth example o f the invention
  • FIG. 8 is a view o f a sealing ring o f the device o f Figure 7.
  • an example o f axial thrust bearing device 10 with an axis 12, is designed to be installed between a top retainer seat (not shown) suitable o f resting, directly or indirectly, in an element of a chassis of the motor vehicle, and a suspension spring 14.
  • the device 1 0 is disposed around a damper rod (not shown) extending on the axis 12, the spring 14 being installed around said rod.
  • the device 10 comprises a top bearing cover 16, a bottom support cover 1 8 , a rolling bearing 20 axially disposed between the covers, and a sealing ring 22 radially mounted between said covers to reduce any ingress of foreign matter.
  • the top bearing cover 16 may consist in one part, for examp le from plastic material, such as polyamide PA 6.6 which may or may not be reinforced with glass fibers.
  • the top bearing cover 16 comprises a top radial portion 16a designed to be in contact with the top retainer seat, an annular internal axial skirt 16b o f small thickness and of small diameter, and an annular external axial skirt 16c o f small thickness and of large diameter radially surrounding the internal skirt 16b .
  • the skirts 16b, 16c extend axially downwards from the radial portion 16a.
  • the bottom end o f the axial skirt 16c is extended radially inwards and axially downward by a short annular frustroconical portion 16d.
  • the rolling bearing 20 is entirely lo cated radially between the skirts 16b, 16c o f the top bearing cover 16.
  • the rolling bearing 20 comprises a top ring 24 and a bottom ring 26, between which is mounted a row of rolling elements 28 , which in this case are balls.
  • the rolling bearing 20 also comprises a cage 30 between the rings so as to maintain an even circumferential spacing between the rolling elements 28.
  • the top ring 24 and the bottom ring 26 are made o f a thin metal sheet, which has been stamped or rolled so as to define toroidal tracks or raceways for the rolling elements 28 between the two rings .
  • the top ring 24 is in contact with a bottom surface of the radial portion 1 6a o f the top bearing cover 16.
  • the bottom ring 26 is in contact with a top surface o f the bottom support cover 1 8.
  • the concave external surface of the top ring 24 forms the track or raceway for the rolling elements 28 , the concave internal surface of the bottom ring 26 forming the track or raceway for said rolling elements .
  • the bottom support cover 1 8 may consist in one part, for example from p lastic material, such as polyamide PA 6.6 which may or may not be reinforced with glass fibers.
  • the bottom support cover 1 8 comprises a cylindrical axial external surface 1 8a o f small axial dimension from the bottom end o f which extends inwards an annular radial surface 1 8b which is pro longed towards the inside and downwards by a rounded surface then by a cylindrical axial surface 1 8c.
  • the axial surface 1 8c makes it possible to centre the spring 14 whereas the radial surface 1 8b provides a bearing surface for said spring.
  • a radial annular bottom surface 1 8d extends towards the inside, prolonged from an edge o f small diameter axially upward by a stepped axial surface forming the bore 1 8e o f the bottom support cover 1 8.
  • the bottom support cover 1 8 also comprises an annular axial skirt 1 8 f extending axially towards the radial portion 1 6a of the top bearing cover 16.
  • the skirt 1 8 f radially surrounds the bottom ring 26.
  • the skirt 1 6c of the top bearing cover 16 radially surrounds the skirt 1 8 f .
  • the top end of the skirt 1 8f is prolonged towards the inside by a surface 1 8h in contact with the bottom ring 26 and o f a form complementing said ring.
  • a rib 32 which may be continuous or discontinuous in the circumferential direction, is arranged on the external surface of the skirt 1 8f.
  • the rib 32 extends radially outwards, towards the frustroconical portion 16d o f the top bearing cover 16.
  • the rib 32 faces radially the frustroconical portion 16d.
  • the bottom support cover 1 8 further comprises an annular radial rib 1 8 i provided on the bore 1 8 e at the vicinity o f its top end.
  • the rib 1 8 i is directed radially towards the inside and is axially positioned below the axial skirt 16b o f the top bearing cover 1 6 so as to delimit with said skirt a narrow annular passage.
  • the rib 1 8i is lo cated slightly away from the axial skirt 16b to form an internal labyrinth sealing portion.
  • the sealing ring 22 is disposed radially therebetween.
  • the sealing ring 22 is made in one part and may be advantageously made from plastic material by moulding, for example in po lyamide (PA) . Alternatively, the sealing ring 22 may also be made from metal.
  • the sealing ring 22 has an annular shape and is resting axially on an annular radial surface 1 8 j o f the bottom support cover 1 8 delimited between the rib 1 8 f and the axial external surface 1 8a.
  • the radial surface 1 8 j extends radially inwards the top end o f the external surface 1 8 a, its edge of small diameter being connected to the bottom end o f the external surface of the skirt 1 8 f .
  • the sealing ring 22 comprises an annular axial portion 22a having a bottom end bearing against the radial surface 1 8 j of the cover 1 8 , an annular protrusion 22b provided on the radially internal surface of the axial portion 22a at vicinity o f its bottom end and which extends radially inwards towards the axial skirt 1 8 f.
  • the sealing ring 22 also comprises an annular frustroconical portion 22c protruding radially outwards and axially upward from the top end of the axial portion 22a and extending towards the skirt 1 6c of the top bearing cover 16.
  • the protrusion 22b has a radial top surface able to interfere with the rib 32 of the bottom support cover 1 8 in order to prevent a separation o f said cover 1 8 from the top bearing cover 16 before the device 10 is installed in the top part of the suspension strut.
  • the external diameter of the radial rib 32 is greater than the inner diameter of the protrusion 22b so that a diametral interference can exist between the sealing ring 22 and the bottom support cover 1 8 to prevent an axial displacement of said cover downward.
  • the protrusion 22b is positioned axially below the rib 32 and spaced apart from said rib. An annular radial gap exists between the protrusion 22b and the external surface o f the skirt 18 f .
  • the frustroconical portion 22c o f the sealing ring is also adapted to prevent an axial separation o f the top bearing cover 16 from the bottom support cover 1 8 and from the rolling bearing 20 before the installation o f the device 1 0 in the top part of the suspension strut.
  • the external diameter of the frustroconical portion 22c is greater than the inner diameter of the frustroconical portion 1 6d o f the top bearing cover 16 so that a diametral interference can exist between the sealing ring 22 and said cover.
  • the frustroconical portion 22c is positioned axially above the frustroconical portion 16d and has a complementary shape.
  • the frustroconical portion 22c is spaced apart from the frustroconical portion 1 6d.
  • the overall radial thickness o f the sealing ring 22 is larger than the smaller dimension of the radial gap between the covers .
  • the protrusion 22b and the frustroconical portion 22c o f the sealing ring 22 form therefore first and second axial retaining means adapted to respectively interact with complementary axial retaining means of the bottom support cover 1 8 and of the top bearing cover 16 in order to axially retain said covers one relative to another before the installation o f the device 10 in the top part of the suspension strut.
  • the device 10 Before its installation, the device 10 constitutes a unitary assembly that can be handled, transported and installed without risk of coming apart.
  • the provision o f the frustroconical portion 22c on the sealing ring 22 makes cheaper the manufacture of the top bearing cover 16.
  • the top bearing cover 16 may be moulded without using a complex mould having moveable slides for the demoulding or stripping of the moulded cover. With such a frustroconical portion 1 6d forming an undercut, the cover 16 can be easily demoulded by force.
  • the frustroconical portion 22c of the sealing ring 22 and the axial skirt 16c of the top bearing cover 16 form a labyrinth seal via narrow annular passageway.
  • Such a labyrinth seal is also formed between the external or outer surface of the axial portion 22a and the axial end of the frustroconical portion 1 6d in order to limit the ingress of foreign matter between the sealing ring 22 and the cover 16.
  • the device 10 comprises a sealing ring 40 disposed radially around the bottom support cover 1 8 and the top bearing cover 16.
  • the sealing ring 40 is resting axially on an annular radial rib 1 8k of said cover 1 8 extending radially outwards the radial surface 1 8 j .
  • the sealing ring 40 has an annular shape and comprises an annular axial portion 40a having a bottom end bearing against the rib 1 8k, an annular radial portion 40b extending radially outwards the axial portion 40a at vicinity o f its bottom end, which is itself extended axially downward by an annular axial portion 40c.
  • the axial portion 40c radially surrounds the rib 1 8k and leaves a radial gap between said ring and the bottom support cover 1 8.
  • the sealing ring 40 also comprises an annular protrusion 40d provided on the internal surface of the axial portion 40c at its bottom end and which extends radially inwards towards the external surface 1 8a o f the bottom support cover 1 8.
  • the protrusion 40d has a radial top surface able to interfere with the rib 1 8k in order to prevent an axial separation of the cover 1 8 from the sealing ring 40.
  • the external diameter of the radial rib 1 8k is greater than the inner diameter of the protrusion 40d so that a diametral interference can exist between the sealing ring 40 and the bottom support cover 1 8.
  • the protrusion 40d is positioned axially below the rib 1 8k and spaced apart from said rib .
  • the sealing ring 40 further comprises an annular protrusion 40e provided on the internal surface of the axial portion 40a at its top end and which extends radially inwards towards the axial skirt 16c of the top bearing cover 16.
  • the protrusion 40e has a radial bottom surface which can bear axially on an annular radial rib 16e arranged on the external surface of the skirt 16c at its bottom end.
  • the rib 16e extends radially outwards.
  • the external diameter of the rib 16e is greater than the inner diameter of the protrusion 40e so that a diametral interference can exist between the sealing ring 40 and the top bearing cover 16.
  • the protrusions 40d, 40e form axial retaining means adapted to respectively interact with complementary means of the bottom support cover 1 8 and o f the top bearing cover 16 in order to axially retain said covers relative to one another. Otherwise, the annular rib 40d of the sealing ring 40 and the rib 1 8k of the cover 1 8 form a labyrinth seal via narrow annular passageway in order to prevent the intrusion o f foreign bodies between said sealing ring and the rib 1 8k.
  • the device 10 comprises a sealing ring 42 disposed inside the bores o f the bottom support cover 1 8 and of the top bearing cover 16.
  • the sealing ring 42 is resting axially on the annular radial rib 1 8i o f the cover 1 8.
  • the sealing ring 42 has an annular shape and comprises an annular axial portion 42a having a bottom end bearing against the rib 1 8 i, an annular radial portion 42b extending radially inwards the axial portion 42a at vicinity o f its bottom end, which is itself extended axially downward by an annular axial portion 42c.
  • the axial portion 42c radially faces the rib 1 8 i and leaves a radial gap between said ring and the bottom support cover 1 8.
  • the sealing ring 42 also comprises an annular protrusion 42d provided on the external surface of the axial portion 40c at its bottom end and which extends radially outwards towards the bore 1 8e of the bottom support cover 1 8.
  • the protrusion 42d is located axially below the rib 1 8 i and spaced apart from said rib .
  • the external diameter of the radial protrusion 42d is greater than the inner diameter of the rib 1 8 i in order that a radial top surface of said protrusion be able to interfere with the rib 1 8 i to prevent an axial separation o f the bottom support cover 1 8 from the sealing ring 42.
  • the protrusion 42d and the rib 1 8 i form a labyrinth seal to limit any ingress of foreign matter between the internal axial skirt 1 6b of the top bearing cover 16 and the rib 1 8 i o f the bottom support cover 1 8.
  • said ring comprises an annular protrusion 42e provided on the external surface of the axial portion 42a at its top end and which extends radially outwards towards the internal skirt 16b of the top bearing cover 16.
  • the protrusion 42e has a radial bottom surface which can bear axially on an annular radial rib 1 6f arranged on the bore of the skirt 16b at its bottom end.
  • the rib 16f extends radially inwards .
  • the external diameter of the protrusion 42e is greater than the inner diameter of the rib 16f so that a diametral interference can exist between the sealing ring 40 and the top bearing cover 16.
  • the radial rib 1 8k extends radially outwards beyond the external skirt 16c of the top bearing cover 16.
  • the rib 1 8k forms a flow deflector against which are broken up any splashes of water thrown up in the direction o f the annular space between the skirt 1 8 f of the cover 1 8 and the axial skirt 16c of the cover 16.
  • the embodiment shown on Figures 7 and 8 differs from the second disclo sed embodiment in that the device 10 comprises a sealing ring 44 disposed radially between the internal skirt 16b of the top bearing cover 16 and an annular internal frustroconical skirt 1 81 o f the bottom support cover 1 8.
  • the skirt 1 81 protrudes radially inwards and axially upward towards the bottom surface of the radial portion 16a o f the cover 16 from the top end of the stepped bore 1 8e.
  • the annular skirt 1 81 is disposed radially between the top ring 24 of the ro lling bearing and the axial skirt 16b of the cover 16.
  • the sealing ring 44 has an annular shape and comprises an annular axial portion 44a having a bottom end bearing against the top surface o f the rib 1 8 i o f the bottom support cover 1 8.
  • the sealing ring 44 is resting axially on said rib .
  • the sealing ring 44 also comprises an annular protrusion 44b provided on the external surface of the axial portion at the vicinity o f its bottom end and which extends radially outwards towards the bottom support cover 1 8.
  • the protrusion 44b has a top surface of a form complementing the frustroconical skirt 1 8b .
  • the protrusion 44b has an external diameter greater than the inner diameter of the skirt 1 81 so that a diametral interference can exist between the sealing ring 44 and the bottom support cover 1 8.
  • the protrusion 44b is positioned axially below the skirt 1 81 and spaced apart from said skirt. A radial gap exists between the protrusion 44b and the cover 1 8.
  • the sealing ring 44 also comprises an annular protrusion 44 c provided on the internal surface of the axial portion 44a at its top end and which extends radially inward towards the axial skirt 16b of the top bearing cover 16.
  • the protrusion 44c is lo cated axially above a frustroconical skirt 16g extending radially outwards and axially downward the bottom end o f the axial skirt 16b o f the cover 16.
  • the protrusion 44c has a bottom surface 44c of a form complementing the skirt 16g.
  • the external diameter of said frustroconical skirt 16g is greater than the inner diameter of the protrusion 44c o f the sealing ring so as to be able to interfere in order to prevent an axial separation of the top bearing cover 16 from the sealing ring 44.
  • the protrusion 44c forms together with the skirts 16b, 16g of the cover 16 a labyrinth seal via narrow annular passageway in order to limit the ingress o f foreign matter between the sealing ring 44 and the cover 16.
  • the sealing rings are each made in one part, for example from plastic material or from metal.
  • the sealing rings are freely movable in axial, radial and circumferential directions relative to the bottom support cover and to the support bearing cover.
  • the bottom support cover and the top bearing cover each may be moulded without using a complex mould having movable slides for the demoulding or stripping of the moulded covers .
  • the two axial retaining means o f the sealing ring form circumferentially continuous protrusions or flanges.
  • Such complementary protrusions spaced relative to one another in the circumferential direction may also be provided on the bottom support cover and/or the top bearing cover.
  • circumferentially continuous rib or hook over 360° the sealing ring can easily be mounted because there is no need to angularly orient the sealing ring relative to said covers during the axial thrust bearing device assembly.
  • the assembly operation o f the axial thrust bearing device 10 o f Figure 1 can easily be realized in the following manner.
  • the bottom support cover 1 8 is positioned horizontally on a support so as to lie on its bottom surface 1 8d. Then, the bottom ring 26, the ro lling elements 28 , the cage 30 and the top ring 24 are installed on the bottom support cover 1 8 , and the sealing ring 22 is snapped on the latter from the top . To end with, the top bearing cover 16 is snapped on the sealing ring 22.
  • the assembly operations of the axial thrust bearing devices o f Figures 3 and 5 differ slightly in that the top bearing cover 16 is positioned before the sealing ring 40, 42 which is snapped on the bottom support cover 1 8.
  • the axial thrust bearing device o f Figure 7 its assembly can be realised in either way described above.

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

Abstract

Le dispositif de palier de poussée axiale, en particulier pour la suspension d'un véhicule à moteur, comprend un couvercle de support inférieur (18), un couvercle de palier supérieur (16), un palier à roulement (20) disposé axialement entre lesdits couvercles, et au moins une bague d'étanchéité (22) pouvant être déplacée librement dans une direction axiale par rapport au couvercle de support inférieur et au couvercle de palier de support. Ladite bague est adaptée à réduire toute entrée de corps étranger entre lesdits couvercles. La bague d'étanchéité (22) comprend des premier et second moyens de retenue axiaux (22b, 22c) adaptés respectivement à coopérer avec le couvercle de support inférieur et le couvercle de palier supérieur pour retenir axialement lesdits couvercles l'un par rapport à l'autre.
PCT/EP2010/052402 2010-02-25 2010-02-25 Dispositif de palier de poussée axiale doté d'une bague d'étanchéité WO2011103921A1 (fr)

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Application Number Priority Date Filing Date Title
PCT/EP2010/052402 WO2011103921A1 (fr) 2010-02-25 2010-02-25 Dispositif de palier de poussée axiale doté d'une bague d'étanchéité

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PCT/EP2010/052402 WO2011103921A1 (fr) 2010-02-25 2010-02-25 Dispositif de palier de poussée axiale doté d'une bague d'étanchéité

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WO2011103921A1 true WO2011103921A1 (fr) 2011-09-01

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2979680A1 (fr) * 2011-09-02 2013-03-08 Ntn Snr Roulements Butee de suspension a deflecteur flottant
FR3025457A1 (fr) * 2014-09-09 2016-03-11 Ntn Snr Roulements Butee de suspension de vehicule automobile
FR3127536A1 (fr) 2021-09-30 2023-03-31 Ntn-Snr Roulements Butée tournante de suspension pourvue d’un joint d’étanchéité et de retenue fretté

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2037377A5 (fr) * 1969-02-18 1970-12-31 Skf Kugellagerfabriken Gmbh
US4780005A (en) * 1986-05-06 1988-10-25 Honda Giken Kogyo Kabushiki Kaisha Sealed thrust ball bearing
EP1445129A1 (fr) * 2003-02-10 2004-08-11 Aktiebolaget SKF Dispositif de butée de suspension
EP1870265A1 (fr) 2006-06-16 2007-12-26 Schaeffler KG Dispositif de ressort
FR2918138A1 (fr) 2007-06-29 2009-01-02 Snr Roulements Sa Butee de suspension comprenant un element d'etancheite mobile.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2037377A5 (fr) * 1969-02-18 1970-12-31 Skf Kugellagerfabriken Gmbh
US4780005A (en) * 1986-05-06 1988-10-25 Honda Giken Kogyo Kabushiki Kaisha Sealed thrust ball bearing
EP1445129A1 (fr) * 2003-02-10 2004-08-11 Aktiebolaget SKF Dispositif de butée de suspension
EP1870265A1 (fr) 2006-06-16 2007-12-26 Schaeffler KG Dispositif de ressort
FR2918138A1 (fr) 2007-06-29 2009-01-02 Snr Roulements Sa Butee de suspension comprenant un element d'etancheite mobile.

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2979680A1 (fr) * 2011-09-02 2013-03-08 Ntn Snr Roulements Butee de suspension a deflecteur flottant
FR3025457A1 (fr) * 2014-09-09 2016-03-11 Ntn Snr Roulements Butee de suspension de vehicule automobile
FR3127536A1 (fr) 2021-09-30 2023-03-31 Ntn-Snr Roulements Butée tournante de suspension pourvue d’un joint d’étanchéité et de retenue fretté
EP4160030A1 (fr) 2021-09-30 2023-04-05 Ntn-Snr Roulements Butée tournante de suspension pourvue d'un joint d'étanchéité et de retenue fretté

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