• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a rolling bearing comprising an outer member (1), an inner member (2) and rolling bodies (3) arranged in a running space formed between said members to allow their relative rotation, said bearing being equipped with a sealing device comprising an armature (6) having a bore (8) which is fitted around an axial annular bearing surface (9) of one of said members, said armature having an inner ring (15) which is provided with tabs (14) distributed angularly, each of said tabs having a distal end (14a) defining therebetween an inscribed diameter in which the bore (8) is formed, said tabs being arranged to be deformable radially between a stable state in which the diameter inscribed is less than the outer diameter of the axial annular bearing surface (9) and a state constrained by fitting on said bearing surface in which the distal ends (14a ) exert a force of axial locking of said armature on said scope.
    公开号:FR3018321A1
    申请号:FR1451792
    申请日:2014-03-05
    公开日:2015-09-11
    发明作者:Pierre Henryon；Jean-Noel Motot
    申请人:NTN SNR Roulements SA；
    IPC主号:
    专利说明:

    [0001] The invention relates to a rolling bearing comprising an inner member, an outer member and rolling bodies arranged in a running space formed between said members to allow their relative rotation.
    [0002] In particular, the invention applies to rolling bearings of a motor vehicle, in particular wheel bearings. Advantageously, a bearing according to the invention allows the mounting of a drive wheel or non-driving motor vehicle, the inner member being rotatable and comprising means for fixing the wheel while the outer member is fixed and comprises fastening means on an element of the vehicle. To prevent, on the one hand, the leakage of lubricant present in the running space and, on the other hand, the contamination of said space with external pollutants, at least one side of the running space can be equipped with a device seal. In particular, it is known to equip a member of a frame carrying at least one dynamic sealing element which interacts in rubbing contact or forming a baffling game with a bearing integral with the other member. Reinforcements bearing at least one static sealing element of its assembly on said member are also known. However, the problem arises of the mechanical strength of the mounting of the armature on the body, in particular relative to the displacement stresses during the rotation of said member, as well as the reliability of the static and dynamic seals between said armature and the organs. In particular, the bearings must meet increasingly stringent specifications in terms of tightness, especially for the validation of wheel bearings by car manufacturers, with regard to salt spray tests with thermal cycling (tests of static and dynamic sealing) to which said bearings must comply.
    [0003] The object of the invention is to improve the prior art by proposing in particular a rolling bearing equipped with a sealing device comprising a reinforcement whose mounting on a member of said bearing is reliable both in terms of its mechanical strength and its seal.
    [0004] For this purpose, the invention proposes a rolling bearing comprising an outer member, an inner member and rolling bodies arranged in a running space formed between said members to allow their relative rotation, said bearing being equipped with a device for rolling. sealing comprising an armature having a bore which is fitted around an axial annular bearing surface of one of said members, said armature having an inner ring which is provided with angularly distributed legs, each of said tabs having a distal end defining between them a diameter inscribed in which the bore is formed, said tabs being arranged to be radially deformable between a stable state in which the inscribed diameter is smaller than the outer diameter of the axial annular bearing surface and a state constrained by fitting on said bearing surface in which the distal ends exert an axial locking force of the adite armature on said scope.
    [0005] Other objects and advantages of the invention will appear in the description which follows, made with reference to the appended figures, in which: FIG. 1 partially and in longitudinal section shows a rolling bearing according to a first embodiment of FIG. invention, showing the mounting of the sealing device on one side of the running space between the inner and outer members of said bearing; FIG. 2 shows in rear view the reinforcement of the sealing device of FIG. 1, FIG. 2a being an enlarged view of FIG. 2. In connection with these figures, a rolling bearing is described below, particularly for mounting a driving or non-driving wheel of a motor vehicle.
    [0006] The bearing comprises an outer member 1 and an inner member 2, at least one of said members may comprise fixing means to respectively a fixed structure or a rotating assembly. In one embodiment, the outer member 1 is fixed, for example having means for fixing the bearing on a suspension element of the motor vehicle, the wheel being associated with the inner member 2 which is then rotating. Between these members 1, 2, a running space is formed to allow the relative rotation of said members. In this description, the terms of positioning in space are taken with reference to the axis of rotation of the bearing. In particular, the term "inside" relates to a disposition close to this axis and the term "outside" relates to a distance arrangement of this axis, the terms "before" and "backward" being relative to a disposition respectively to left and right in Figure 1.
    [0007] To allow rotation, each member 1, 2 may have two axially spaced races so as to form between said members two raceways in which are arranged respectively a row of rolling bodies 3, said rolling bodies being able to be in the form of of balls, said balls being held in a row by means of a retention cage 4. However, the invention is not limited to an embodiment of the bearing, in particular with respect to the geometries of the rolling bodies 3 and and / or inner and outer members 2 1. To protect the running space from pollution of the surrounding environment, the bearing comprises a sealing device disposed between the outer member 1 and the inner member 2. The device is arranged to prevent, or at least limit the penetration of pollutants into the running space through a lateral opening 5 of said space formed between the members s 1, 2.
    [0008] To do this, the sealing device has at least one annular reinforcement 6 which is integral with a member 1, 2. In particular, the frame 6 can be made in one piece, in particular based on plastic or metallic material , for example stamped sheet.
    [0009] The armature 6 is equipped with at least one static sealing element 7 between said armature and a wall of the body 1, 2, said sealing element preventing the introduction of pollutants between said armature and said wall. The static sealing element 7 may be molded onto the frame 6 by being made of a flexible material, for example an elastomer, especially based on nitrile butadiene copolymer (NBR), optionally mechanically reinforced with fillers such as black carbon, hydrogenated NBR (HNBR), fluoropolymer or polyacrylate.
    [0010] The armature 6 also has a bore 8 which is mounted by fitting around an axial bearing 9 of the member 1, 2 ensuring the proper positioning of said armature relative to said body. In relation with FIG. 1, the bore 8 is fitted around an inner axial bearing surface 9 of the inner member 2, the armature 6 having a radial annular wall 10 which bears axially against a complementary radial wall 11 of said internal member, said complementary radial wall being connected to the axial bearing surface 9 of said member.
    [0011] The armature 6 further comprises a free outer ring 12 which extends radially and is connected to the radial wall 10 by a connection fillet 13. The armature 6 carries the static sealing element 7 which covers the annular wall radial 10 and the outer ring 12 so as to be arranged in a sealed manner between said radial wall and the complementary wall 11.
    [0012] In particular, the static sealing element 7 is associated with the armature 6 by having a front bead 7a which is arranged around the axial support between the radial wall 10 of said armature and the complementary wall 11 of the body inside 2 to make reliable the static sealing of the assembly. To allow the fitting of the armature 6 around the annular bearing surface 9 by making its locking in position relative to the member 1, 2 more reliable, provision is made to equip the bore 8 with elastically deformable tabs 14 which are distributed angularly. each having a distal end 14a defining between them an inscribed diameter in which is formed the fitting bore 8. In particular, the tabs 14 are deformable radially between a stable state in which the inscribed diameter is smaller than the outer diameter of the axial annular bearing 9 and a state constrained by fitting on said bearing in which the distal ends 14a exert an axial locking force of the frame 6 on said bearing.
    [0013] According to the embodiment shown, the armature 6 comprises an inner ring 15 which is provided with tabs 14 which are circumferentially separated by notches 16. The inner ring 15 is inclined outwardly and rearwardly with respect to the radial annular wall 10 to improve the plating of the static sealing element 7 on the complementary wall 11, said ring having a succession of tabs 14 and notches 16. The notches 16 each have a dimension allowing the radial elastic angular deflection of each of the legs 14 during fitting. Thus, the tabs 14 are deformable from their stable state to their constrained state by radial external displacement, independently of each other, the distal ends 14a of said tabs each having a free span 17 bearing radially on the fitting seat 9 in constrained state. Advantageously, the fitting surface 9 has a constant outer diameter, in particular being devoid of groove, to facilitate the sliding and the radial deformation of the lugs 14 on said bearing surface during fitting.
    [0014] In relation to FIG. 2, the notches 16 each have a concave geometry, the tabs 14 being in the form of segments of the same dimension which extend circumferentially. The free span 17 of each of the lugs 14 extends circumferentially over an angular portion, said free span having in particular a constant diameter and extending over an angular portion which is sufficient to make reliable the axial locking of the frame 6 on the However, the invention is not limited to one embodiment of the inner ring 15, in particular relative to its external inclination, to the geometries of the notches 16 and / or the tabs 14, as well as to their number. For example, the tabs 14 may have a triangular geometry, with a free span 17 which extends over a reduced angular portion.
    [0015] Furthermore, the sealing device may have a dynamic sealing element which is secured to a member 1, 2 to interact with a bearing secured to the other member 2, 1 to ensure the seal on the side of the running space. The dynamic sealing element may be carried by the armature 6, for example by being made in one piece with the static sealing element 7. In particular, the dynamic sealing element may have at least one lip extending from a member 1, 2 and arranged in frictional contact on an interaction surface of the other member 2, 1. Alternatively or in a complementary manner, the dynamic sealing member may comprise a projection forming a chicanery game with an interaction range formed on the organ 1, 2 corresponding. The sealing device may comprise a second armature 18 which is mounted on the other member 2, 1 while carrying a dynamic sealing element interacting with a bearing surface of the armature 6. In addition, in the case where the armature 6 carries a dynamic sealing member, the second frame 18 may have a scope of interaction with said sealing member.
    [0016] According to the embodiment shown, the outer member 1 comprises an annular extension 19 which extends axially on one side of the running space by having three respectively end walls 19a, 19b and 19c inner walls around which is mounted the second armature 18. The second armature 18 has a free outer ring 20 arranged facing the outer wall 19b, an inner axial surface 21 which is mounted in particular by axial fitting on the inner wall 19c of the annular extension 19, said worn being connected by an intermediate bearing surface 22 in axial abutment against the end wall 19a to form in particular an end stop fitting. In addition, the second frame 18 includes a free radial bearing surface 23 which extends inwardly from the axial inner bearing surface 21.
    [0017] The second armature 18 is equipped with a static sealing element 24 which extends around the outer ring 20 to prevent the introduction of pollutants between said armature and the annular extension 19. In connection with FIG. outer wall 19b has grooves 25 on which the static sealing member 24 is sealingly abutting.
    [0018] The second armature 18 comprises a dynamic sealing element 26 having a projection 27 which extends axially radially opposite the end of the outer ring 12 of the armature 6 so as to form a baffling game. Thus, an annular sealing chamber 28 is formed between the plates 6, 18, being limited externally by the projection 27, the baffling set defining the opening 5 of said chamber and the running space which is arranged to limit the introduction of pollutants, including sludge, into said chamber and thus into said running space.
    [0019] In addition, the dynamic sealing element 26 comprises a lip 29 which extends from the inner radial surface 23 of the second armature 18 to be in axial frictional contact in the sealing chamber 28 on the inner ring 15 of the In FIG. 1, the dynamic sealing element 26 has an inner edge surrounding the inner end of the second armature 18, an additional lip 30 being in rubbing contact with the axial annular bearing surface 9 of the body inside 2.
    [0020] Advantageously, the lips 29, 30 have an inverted rubbing contact in order to limit the introduction of pollutants into the running space for the sealing lip 29 and the leakage of lubricant into the sealing chamber 28 for the lip 30 .
    [0021] In order to form a baffle in the sealing chamber 28, the dynamic sealing element 26 comprises a second projection 31 disposed in said sealing chamber between the lip 29 and the armature 6 extending essentially axially in order to forming a baffle between said projection and said armature, said projection having a radial and axial clearance with said armature.
    [0022] Thus, the baffle makes it possible, without inducing torque, to limit the introduction of pollutants into the sealing chamber 28, in particular at the level of the sealing lip 29, said lip being able to present a reduced friction torque since a portion of the sealing function is performed upstream by the baffle. The second armature 18 may be made in one piece, for example in a material identical to the first armature 6, such as a metal material, in particular pressed sheet metal. Advantageously, the static sealing elements 24 and dynamic 26 are made of a single piece of flexible material, for example elastomer which is associated with the second frame 18, for example by overmolding.
    权利要求:
    Claims (11)
    [0001]
    REVENDICATIONS1. Rolling bearing comprising an outer member (1), an inner member (2) and rolling bodies (3) arranged in a running space formed between said members to allow their relative rotation, said bearing being equipped with a device sealing comprising an armature (6) having a bore (8) which is fitted around an axial annular bearing surface (9) of one of said members, said bearing being characterized in that the armature (6) has an inner ring ( 15) which is provided with tabs (14) distributed angularly, each of said tabs having a distal end (14a) defining therebetween an inscribed diameter in which the bore (8) is formed, said tabs being arranged to be deformable radially between a stable state in which the inscribed diameter is smaller than the outside diameter of the axial annular bearing surface (9) and a state constrained by fitting on said bearing surface in which the ends distal (14a) exert a force of axial locking of said armature on said scope.
    [0002]
    2. Rolling bearing according to claim 1, characterized in that the tabs (14) are circumferentially separated by notches (16) allowing the radial elastic angular displacement of each of said tabs during fitting.
    [0003]
    3. Rolling bearing according to one of claims 1 or 2, characterized in that the distal ends (14a) each have a free span (17) which bears radially on the fitting seat (9).
    [0004]
    4. Rolling bearing according to claim 3, characterized in that the free span (17) extends circumferentially on an angular portion.
    [0005]
    Rolling bearing according to one of Claims 1 to 4, characterized in that the fitting surface (9) has a constant outside diameter.
    [0006]
    6. Rolling bearing according to any one of claims 1 to 5, characterized in that the armature (6) has an annular wall (10) which extends substantially radially, the inner ring (15) being inclined externally by relative to said radial wall.
    [0007]
    7. rolling bearing according to claim 6, characterized in that the annular wall (10) bears axially on a complementary wall (11) of the member (1, 2).
    [0008]
    8. rolling bearing according to any one of claims 1 to 7, characterized in that the armature (6) is equipped with at least one static sealing element (7) of the mounting of said armature on the organ (1, 2).
    [0009]
    9. rolling bearing according to any one of claims 1 to 8, characterized in that the sealing device has a dynamic sealing element which is integral with a member (1, 2) to interact with a jointed bearing the other member (2, 1), the armature (6) having said dynamic sealing element and / or said interaction range.
    [0010]
    10. Rolling bearing according to claim 9, characterized in that the sealing device comprises a second armature (18) which is mounted on the other member (2, 1), said second armature having a dynamic sealing element (26) interacting with the armature (6) and / or an interaction surface with a dynamic sealing element of said armature.
    [0011]
    Roller bearing according to one of Claims 9 or 10, characterized in that a dynamic sealing element (26) is arranged in frictional contact on an interaction surface or forms a baffling set with a bearing surface. 'interaction.30
    类似技术:
    公开号 | 公开日 | 专利标题
    FR3018321A1|2015-09-11|BEARING BEARING EQUIPPED WITH A SEALING DEVICE COMPRISING AN ARMATURE
    WO2012107693A1|2012-08-16|Rolling-contact bearing having an annular extension and a sealing device
    EP1277978A1|2003-01-22|Conical roller bearing with a sealing device
    FR3020421A1|2015-10-30|BEARING BEARING, IN PARTICULAR FOR A CLUTCH STOP DEVICE
    FR3018874A1|2015-09-25|BEARING BEARING EQUIPPED WITH A SEALING DEVICE COMPRISING AN ARMATURE
    FR3033853A1|2016-09-23|BEARING COMPRISING A WEAR RING
    FR2971825A1|2012-08-24|Rolling bearing for use in clutch release bearing device arranged on diaphragm of clutch of motor vehicle, has metallic rigid stop portions cooperating by contact with rolling elements to limit angular tilting of movable outer ring
    FR3020423A1|2015-10-30|BEARING BEARING, IN PARTICULAR FOR A CLUTCH STOP DEVICE
    EP3015728B1|2017-09-20|Rolling bearing provided with a sealing device comprising a frame
    EP2821662B1|2019-06-05|Wheel hub rolling bearing assembly for a motor vehicle with a sealing device
    FR3074861A1|2019-06-14|BEARING BEARING EQUIPPED WITH A SEALING DEVICE
    FR3056655B1|2019-07-19|BEARING BEARING EQUIPPED WITH A SEALING DEVICE
    WO2017055724A1|2017-04-06|Rolling bearing
    FR3025008A1|2016-02-26|ORIENTATION BEARING, IN PARTICULAR FOR A VEHICLE
    EP3680500A1|2020-07-15|Roller bearing provided with a sealing device
    FR3064705B1|2019-07-19|BEARING BEARING
    FR3018320A1|2015-09-11|BEARING BEARING COMPRISING A SEALING DEVICE
    FR3033851A1|2016-09-23|BEARING BEARING EQUIPPED WITH A SEALING DEVICE COMPRISING AN ARMATURE
    FR3018876A1|2015-09-25|BEARING BEARING EQUIPPED WITH A SEALING DEVICE COMPRISING AN ARMATURE
    FR3018875A1|2015-09-25|BEARING BEARING EQUIPPED WITH A SEALING DEVICE COMPRISING AN ARMATURE
    EP3626486A1|2020-03-25|Suspension bump stop for motor vehicle
    FR3075103B1|2019-11-22|SUSPENSION STOP DEVICE AND FORCE LEG EQUIPPED WITH SUCH A DEVICE
    FR3033852A1|2016-09-23|BEARING BEARING EQUIPPED WITH A SEALING DEVICE COMPRISING TWO FRAMES
    FR3008149A1|2015-01-09|BEARING BEARING, IN PARTICULAR FOR A CLUTCH STOP DEVICE
    FR3101925A1|2021-04-16|Assembly comprising a rolling assembly of a motor vehicle and a rotating guide bearing
    同族专利:
    公开号 | 公开日
    FR3018321B1|2016-12-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3752543A|1972-02-16|1973-08-14|Roller Bearing Co Of America|Roller having retaining end plate and seal|
    EP0458123A2|1990-05-24|1991-11-27|Skf Industrie S.P.A.|Seal device for bearings of motor vehicle wheel hubs|
    DE102009009633A1|2009-02-19|2010-08-26|Schaeffler Technologies Gmbh & Co. Kg|Sealing for a rolling bearing|
    DE102009052311A1|2009-11-07|2011-05-12|Schaeffler Technologies Gmbh & Co. Kg|Encoder ring for use in sensor system of wheel bearing unit of motor vehicle, has fastening part with disk-shaped section connected with signal providing part by conical or hollow cylindrical connecting piece|
    DE102011088861A1|2011-12-16|2013-06-20|Schaeffler Technologies AG & Co. KG|Wheel hub for vehicle, has conical seat which is diagonally arranged with respect to axial retention surface of the rim|CN108027066A|2015-10-09|2018-05-11|Nok株式会社|Sealing device|
    FR3074861A1|2017-12-08|2019-06-14|Ntn-Snr Roulements|BEARING BEARING EQUIPPED WITH A SEALING DEVICE|
    EP3453905A4|2016-06-20|2019-12-25|Nok Corporation|Sealing device|
    US11156251B2|2019-04-16|2021-10-26|Aktiebolaget Skf|Labyrinth sealing device for improved drainage|
    法律状态:
    2016-03-21| PLFP| Fee payment|Year of fee payment: 3 |
    2017-03-22| PLFP| Fee payment|Year of fee payment: 4 |
    2018-03-23| PLFP| Fee payment|Year of fee payment: 5 |
    2020-03-19| PLFP| Fee payment|Year of fee payment: 7 |
    2021-12-10| ST| Notification of lapse|Effective date: 20211105 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1451792A|FR3018321B1|2014-03-05|2014-03-05|BEARING BEARING EQUIPPED WITH A SEALING DEVICE COMPRISING AN ARMATURE|FR1451792A| FR3018321B1|2014-03-05|2014-03-05|BEARING BEARING EQUIPPED WITH A SEALING DEVICE COMPRISING AN ARMATURE|
    [返回顶部]