• 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:
    This ring (6) bearing (2) comprises at least one bead (60) for wedging a seal (16), each bead protruding from a radial surface (S6i) of the ring (6). in a direction orthoradial with respect to a central axis of the ring.
    公开号:FR3022964A1
    申请号:FR1456083
    申请日:2014-06-27
    公开日:2016-01-01
    发明作者:Stephane Gaultier；Benoit Arnault
    申请人:SKF AB；
    IPC主号:
    专利说明:

    [0001] The invention relates to a bearing ring, a method of manufacturing such a ring and a bearing comprising such a ring. Although the invention is preferably applied to the outer ring of the bearing, it can also be implemented on the inner ring of the bearing. The invention finds particular application in non-swiveling clutch stops but can also be applied to swiveling abutments.
    [0002] In the field of mechanical bearings, in particular for clutch stops, it is known to use gaskets, or flanges, for protection, which are mounted inside the bearing to retain the grease near the rolling elements and to protect the rotation against external pollution. The problem that arises is the attachment of the seal on the inner or outer ring of the bearing. The bearing rings are manufactured by cutting and stamping a sheet metal. In FR-A-2 741 125, a peripheral groove is made 360 ° by stamping. It allows the attachment of an annular flange which isolates a rolling chamber from the outside. The stamping cups the material in a direction perpendicular to the thickness of the sheet. This technique has high dimensional tolerances and the groove can be deformed during the final stamping of the ring. In addition, the settlement of material in the sheet, necessary to achieve the groove, causes a thinning of the sheet at the groove and thus, a weakening of the ring in the fastening area of the flange. It is these drawbacks that the invention intends to remedy more particularly by proposing a bearing ring with which it is possible to fix a seal more precisely, without weakening the structure of the ring, that is to say without thinning it in the joint fixing area. To this end, the invention relates to a bearing ring which comprises at least one wedging bead of a seal, each bead extending protruding from a radial surface of the ring, in a direction orthoradial with respect to a central axis of the ring. Thanks to the invention, a bearing protection seal can be wedged via the peripheral beads or beads. Each bead forms an extra thickness relative to the rest of the ring, that is to say that it does not cause thinning of the ring in the seal attachment area.
    [0003] According to advantageous but non-obligatory aspects of the invention, a bearing ring may comprise one or more of the following characteristics, taken in any technically permissible combination: The ring comprises several beads disjoined from each other.
    [0004] The beads are arranged in pairs diametrically opposite. - Each bead extends at an identical angle relative to the central axis of the ring. The sum of the angles over which the beads extend is less than 350 °, preferably less than 320 ° and preferably equal to 300 °. - The ring comprises a single bead, which extends over the entire periphery of the radial surface of the ring. - The thickness of the ring is different on either side of the or beads and each bead has a sealing face of the seal, which is arranged on the thickest side of the ring.
    [0005] The invention also relates to a bearing comprising a ring as described above. The invention finally relates to a method of manufacturing a bearing ring, comprising a step a) of stamping an annular sheet, defining a central axis, and it comprises a step b) subsequent to step a), consisting of to axially stamp the stamped sheet in step a) to repel material and form one or more peripheral beads protruding from a radial surface of the stamped sheet. According to an advantageous but not compulsory aspect of the method, it comprises a step c) subsequent to step a) and prior to step b), of flattening an axial face of the ring, adapted to bear against an anvil during the stamping of step b). The invention and other advantages thereof will appear more clearly in the light of the following description of an embodiment of a bearing ring according to its principle, given by way of example and made in reference to the accompanying drawings in which: - Figure 1 is a partial section of a bearing according to the invention comprising a ring also according to the invention - Figure 2 is an enlarged view of the box II FIG. 3 is a sectional view in the plane of the bearing ring of FIGS. 1 and 2; FIGS. 4 to 7 are sections similar to FIG. 1, of four other embodiments of FIG. rolling according to the invention.
    [0006] In Figure 1 is shown a mechanical bearing 2. This mechanical bearing 2 can be used as a clutch stop. It comprises an outer ring 6, which is centered on an axis X6 and an inner ring 4, which is disposed coaxially inside the ring 6. In practice, the outer ring 6 is rotating, while the inner ring 4 is fixed. In the remainder of the description, a rear direction designates an axial direction, that is to say parallel to the axis X6, which is turned towards an actuator, having for example the shape of a non-clutch fork. shown, adapted to support the right side of the bearing 2 in Figure 1, which corresponds to the functional bearing side of the actuator.
    [0007] Conversely, a forward direction designates an axial direction, opposite to the aforementioned direction, which is turned towards a clutch diaphragm or a pressure plate not shown, this diaphragm being in practice bearing on the ring 6 on the left-hand side in FIG. , directly or indirectly if a wear ring is placed between the two. The rings 4 and 6 are made of metal and each comprise a front portion, respectively 4d and 6d, which extends radially inward towards the central axis X6. The rings 4 and 6 also comprise a rear part, respectively 4b and 6b, which extends perpendicularly to the front part, respectively 4d and 6d. The front portion 6d of the ring 6 has a front end face S6d, which is perpendicular to the axis X6. The rings 4 and 6 delimit between them a housing, or a chamber, for receiving rolling elements 8. In the example, the rolling elements 8 are balls but they can also be rollers or needles. The rolling elements 8 are held in their chamber by a cage 10. The bearing 2 comprises rear and front ring joints, respectively referenced 14 and 16, which are arranged coaxially between the rings 4 and 6. These seals 14 and 16 serve to retain the grease near the rolling elements 8 in operation and to limit the infiltration of external particles inside the bearing 2. The seal 14 comprises an armature of metallic or synthetic material, such as polyamide 140, which is crimped around the outer ring 6 and an elastomer portion 142, which is integral with the frame 140 and which seals in contact with the inner ring 4. In the same way, the seal 16 comprises a metal frame 160 of mild steel or spring and a flexible elastomer portion 162 integral with the frame 160. The flexible portion 162 seals in contact with the inner ring 4, while the rigid part, that is to say the armature 160, seals and maintains contact with the outer ring 6. More precisely, the armature 160 is disposed in abutment against a rear face S'6d of the front portion 6d of the ring 6 and the flexible portion 162 bears against an outer radial surface S4e of the inner ring 4. In this case where the outer ring 6 is rotating, the seal 16 is fixedly connected to the rotating ring 6 and rubs against the fixed ring 4. The elastomer portion 162 may be attached to the frame 160 by any suitable means, including gluing, welding or overmolding. The elastomer portion 162 comprises two lips 162a and 162c, the lip 162a bearing against the outer radial surface S4e of the inner ring 4. This portion 162 also comprises a portion 162b in which the armature 160 penetrates. The seal 16 is stuck, or fixed, between the rings 4 and 6 by means of four beads 60 formed on an inner radial surface S6i of the outer ring 6. These beads 60 are arranged at the front of the rear part 6b, that is to say ie on the side of the fork, which corresponds to the front side clutch or the side of the pressure plate. In the embodiment of Figures 1 to 3, the beads 60 are disjointed from each other, are four in number and are arranged two by two diametrically opposite with respect to the axis X6. However, the number of beads may be different from four and they are not necessarily arranged diametrically opposite. For example, in the case of an odd number of beads, the latter may be equi-distributed around the axis X6. Each bead 60 extends in an othoradial direction about the axis X6, that is to say that it extends in a plane perpendicular to the axis X6, as the plane of Figure 3, on a portion of a circle.
    [0008] As can be seen in FIG. 3, each bead 60 extends over an identical angular sector at the same apex angle A1. In the example, the angle Al is chosen equal to 75 ° but it can be different. For example, in the case where only two beads 60 are provided, the angle A1 may be 175 °, preferably 150 °. In the case where three beads 60 are provided, this angle may be 110 °, preferably 100 °. The angle Al therefore varies according to the number of beads 40. The sum of the angles A1 on which the beads 60 extend is less than 350 °, preferably less than 320 °, preferably equal to 330 °. Furthermore, D denotes the minimum inside diameter of the ring 6, that is to say the distance, measured passing through the center of the ring 6, between two diametrically opposite beads 69. Each bead 60 has a wedging surface S60 of the armature 160 of the gasket 16. The armature 160 is wedged by the bead 60 against the front face S'6d of the rear portion 6d of the ring 6. In this way, the seal 16 is immobilized inside the bearing 2.
    [0009] The thickness of the ring 6 is different on both sides of the beads 60. Note e6 the nominal thickness of the ring 6. At the rear of a bead 60, that is to say on the side of the rolling chamber, the thickness e6 of the ring is less than or equal to the thickness e6. At the front of a bead 60, that is to say between this bead and the front portion 6d, the thickness e "6 of the ring is equal to or slightly greater than the thickness e6. The method of obtaining the beads 60 described below: The surface S60 is disposed on the thickest side of the ring 6, that is to say on the side of the part 6d. thinned, that is to say weakened, in the area of the seal blocking zone 16. There is therefore less risk of settling of the material near the bead 60, which improves the attachment of the seal 16 The following is a description of the method of manufacturing the outer ring 6. A first step of this method consists in forging an annular sheet by stamping so as to give the sheet a shape similar to that of the ring 6. Figure 1. This involves stamping a pre-cut flat annular sheet, and then the process comprises a subsequent step of stant to flatten an axial face S6d forming the front surface of the front portion 6d of the axis 6 and the axial face S6b forming the rear surface of the rear portion 6b. The flattening of these surfaces can be carried out by any appropriate means, in particular by turning, stamping or height calibration. In practice, a flatness of less than or equal to one-tenth of a millimeter is tolerated for these surfaces. The face S6d is flattened because it serves as a reference for a subsequent stamping operation, to form the beads 60. This face S6d is indeed pressed against an anvil not shown during the final stamping of the sheet; therefore, it is advisable to have a flat surface to obtain a good precision. The aforementioned final stamping intended to form the beads 60 is performed axially, that is to say parallel to the axis X6 of the ring 6. An unrepresented plate provided with several identical axial punches can be used to form the flanges 60. This plate is engaged axially, hot or cold, and forward in the material of the ring 6, in the direction of the arrow F1 in Figure 2. This requires less effort than a stamping in a direction perpendicular to the thickness of the sheet, which has a tendency to compact the material in the thickness of the sheet, as made in FR-A-2741 125 during the forming formation of the groove. The punches of the plate are stamped into the material of the ring 6 to a depth d, measured parallel to the axis X6, which is identical for each punch. The depression of the punches in the material causes the pushing, or repression, of the material forward by plastic deformation. The beads 60 are formed. These beads 60 are hardened relative to the rest of the ring 6 due to the work hardening caused by the plastic deformation of the material.
    [0010] The beads 60 form a radial extra thickness and with respect to the rear side 6b of the ring 6 and a radial extra thickness e2 relative to the front side 6d of the ring 6. The extra thickness el is greater than the extra thickness e2. The volume of material displaced is controlled by the distance d of depression punches of the plate in the material of the ring 6. Thus, each bead 60 has the same dimensions, so that this operation is accurate and easily repeatable. The values of excess thickness e1, e2 and thus the internal diameter D, that is to say the distance between two diametrically opposite beads 60, are thus obtained very precisely. The manufacture of the ring 6 is therefore automatable, that is to say industrially. Furthermore, the final stamping to form the beads 60 does not cause thinning of the ring at the front of the beads 60. The formation of the beads 60 by stamping or any other method of embossing material is carried out before any heat treatment of the ring 6, such as dipping in an oil bath. If the ring is not heat treated, the seal 16 can be mounted inside the ring 6 before the stamping operation to form the beads 60. In Figures 4 to 7 are shown four other modes of 2. Each bearing of these different embodiments comprises an outer ring 6. These four modes differ from the first mode in the assembly of the seal 16 on the ring 6. The elements described below, which are identical to those of the first embodiment, retain their numerical reference, while the different or additional elements carry other numerical references. In the embodiment of FIG. 4, the seal 16 comprises a frame made of mild steel into which the hard steel beads 60 penetrate in a superficial manner, which makes it possible to immobilize the seal 16 inside the bearing 2. In the embodiment of Figure 5, the elastomer portion 162 of the seal 16 has a lip 162d in contact with the rear face S'6d of the front portion 6d of the ring 6. The sealing of the seal 16 with the ring 6 is therefore no longer made by the frame 160 but by the elastomer part 162. In addition, this ring comprises a single bead 60, which extends, projecting from the internal radial surface S6, over 360 ° around the axis X6, that is to say on the whole periphery. In this case, the armature 160 of the gasket 16 advantageously comprises tabs distributed around the periphery of this armature to jam in front of the bead 60. According to another embodiment shown in FIG. 6, the gasket 16 further comprises , another elastomeric portion 166 which is attached to one end of a frame 163 of the seal 16. The outer ring 6 of this embodiment also has a single peripheral bead 60, extending 360 ° about the axis X6. The elastomer portion 166 is wedged by the single bead 60 and at the same time seals against the ring 6 and the anchoring of the seal 16 on this ring. In Figure 7 is shown a fifth embodiment of a bearing 2.
    [0011] This bearing 2 has the particularity of having a rotating inner ring 4 and an outer ring 6 fixed. The bearing 2 also comprises a plastic sleeve 24, which is arranged coaxially inside the inner ring 4. Preferably, this sleeve 24 must not rub against the inner ring 4 under operating conditions of the bearing 2. Bearing 2 also includes a rear tray 22 attached to the sleeve 24. In this embodiment, the beads 60 are provided on the rear side of the outer ring 6, that is to say on the side of the fork. They form means for wedging a seal 20 comprising a frame 200 and an elastomer portion 202 attached to the frame 200. In this bearing 2, a seal 18 is also provided at the front of the bearing, that is to say on the side of the diaphragm, to retain grease and prevent the infiltration of particles inside the bearing. As a variant not shown and whatever the embodiment, the frame 160, 163 or 200 may be plastic. According to another variant not shown, the seal 16 is monobloc and entirely made of synthetic material. According to another variant not shown, the seal 16 is a non-contact seal, that is to say which is not in abutment against one or the other of the rings. This seal is for example a labyrinth type seal. According to another variant not shown, or the beads have a triangular section, that is to say that the sealing face of the seal, similar to the surface S60, is rigorously frustoconical, or frustoconical portion and converges to the rearward towards the X6 axis, since round-section punches are used. According to a variant not shown, or the beads 60 are formed on an outer surface of the inner ring 4. In the figures, the invention is shown in its implementation in the non-swiveling clutch bearings. It is applicable to swiveling clutch stops and, more generally, to any type of bearing. In the case of a non-rotating stop, the rotating ring is rotatable only about its axis while in the case of a rotary stop, the rotating ring is rotatable about its axis and around any which radial axis to its central axis.
    [0012] The features and variants of the embodiments envisaged above may be combined with one another to generate new embodiments of the invention.
    权利要求:
    Claims (10)
    [0001]
    1. Ring (6) bearing (2), characterized in that it comprises at least one bead (60) for wedging a seal (16; 20), each bead projecting in relation to a radial surface (S6i) of the ring (6), in a direction orthoradiale with respect to a central axis (X6) of the ring.
    [0002]
    2. Ring according to claim 1, characterized in that it comprises a plurality of beads (60) disjoined from each other.
    [0003]
    3. Outer ring according to claim 2, characterized in that the beads (60) are arranged in pairs diametrically opposite.
    [0004]
    4. Ring according to one of claims 2 and 3, characterized in that each bead extends over an angle (A1) identical to the central axis (X6) of the ring (6).
    [0005]
    5. Ring according to one of claims 2 to 4, characterized in that the sum of the angles (A1) on which the beads (60) extend is less than 350 °, preferably less than 320 ° and preferably equal to 300 °.
    [0006]
    6. Ring according to claim 1, characterized in that it comprises a single bead, which extends over the entire periphery of the radial surface of the ring.
    [0007]
    7. Ring according to one of the preceding claims, characterized in that the thickness (é6, e "6) of the ring (6) is different on either side of the or beads (60) and in that each bead (60) has a sealing face (S60) of the seal (16; 20) which is arranged on the thicker side of the ring.
    [0008]
    8.- Bearing, characterized in that it comprises a ring (6) according to one of the preceding claims.
    [0009]
    9. A method of manufacturing a ring (6) bearing (2), comprising a step a) of stamping an annular sheet, defining a central axis, and characterized in that it comprises a step b) posterior in step a), consisting in stamping (F1) axially the stamped sheet in step a) to repel material and form one or more peripheral beads (60) projecting from a radial surface (S6i) of the sheet metal stamped.
    [0010]
    10.- Method according to the preceding claim, characterized in that it comprises a step c) subsequent to step a) and prior to step b), of flattening an axial face (S6d) of the ring, adapted to bear against an anvil during the stamping of step b).
    类似技术:
    公开号 | 公开日 | 专利标题
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    同族专利:
    公开号 | 公开日
    CN105221574B|2019-08-13|
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    CN105221574A|2016-01-06|
    US9677615B2|2017-06-13|
    DE102015211857A1|2015-12-31|
    US20150377292A1|2015-12-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1249625A1|2001-04-11|2002-10-16|INA- Schaeffler KG|Sealing for a clutch release bearing|
    US20110188797A1|2008-09-16|2011-08-04|Benoit Arnault|Rolling Bearing, Its Use, and a Motor Vehicle Fitted with such a Rolling Bearing|
    JP2010112532A|2008-11-10|2010-05-20|Ntn Corp|Ball bearing for clutch release bearing device|
    FR2984978A1|2011-12-22|2013-06-28|Skf Ab|Method for manufacturing bearing that is utilized in rotary device i.e. clutch thrust, involves allowing reliefs to protrude such that reliefs are inserted into peripheral groove of ring on which gasket is fixed in undeformed state|
    US5242229A|1992-11-25|1993-09-07|The Torrington Company|Sealing structure for standardized bearing ring|
    FR2741125B1|1995-11-09|1998-01-16|Skf France|PROTECTIVE FLANGE FOR BEARING, ASSOCIATED BEARING AND METHOD FOR MANUFACTURING A BEARING RING EQUIPPED WITH A PROTECTIVE FLANGE|
    WO2002044579A1|2000-11-30|2002-06-06|Ina-Schaeffler Kg|Seal for a clutch release bearing|
    DE10311207B4|2003-03-14|2010-10-07|Schaeffler Technologies Gmbh & Co. Kg|release bearing|
    JP2006009932A|2004-06-25|2006-01-12|Koyo Seiko Co Ltd|Clutch-release bearing|
    CN102202912B|2008-10-29|2015-08-26|Ntn株式会社|Be combined with the bearing apparatus for wheel of wheel speed detector|FR3033853B1|2015-03-16|2017-03-10|Skf Ab|BEARING COMPRISING A WEAR RING|
    FR3034151B1|2015-03-24|2018-07-20|Aktiebolaget Skf|BEARING COMPRISING AN OVERMOLDED WEAR, AND METHOD OF MANUFACTURING THE SAME|
    DE102016204500B3|2016-03-18|2017-08-03|Schaeffler Technologies AG & Co. KG|release bearing|
    DE102017211785A1|2016-08-08|2018-02-08|Aktiebolaget Skf|Roller bearing with protective flange and method of assembling a race with such a protective flange|
    EP3453907B1|2017-07-27|2020-09-30|NSK Ltd.|Bearing for clutch|
    FR3078120B1|2018-02-21|2020-04-17|Ntn-Snr Roulements|CLUTCH STOPPER OF A MOTOR VEHICLE EQUIPPED WITH A SEALING DEVICE ON THE REAR SIDE OF THE ROAD|
    法律状态:
    2015-06-30| PLFP| Fee payment|Year of fee payment: 2 |
    2016-01-01| PLSC| Search report ready|Effective date: 20160101 |
    2016-06-30| PLFP| Fee payment|Year of fee payment: 3 |
    2017-06-29| PLFP| Fee payment|Year of fee payment: 4 |
    2018-06-29| PLFP| Fee payment|Year of fee payment: 5 |
    2020-06-26| PLFP| Fee payment|Year of fee payment: 7 |
    2021-06-25| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1456083A|FR3022964B1|2014-06-27|2014-06-27|BEARING RING, METHOD OF MANUFACTURING SUCH RING AND BEARING COMPRISING SUCH RING|FR1456083A| FR3022964B1|2014-06-27|2014-06-27|BEARING RING, METHOD OF MANUFACTURING SUCH RING AND BEARING COMPRISING SUCH RING|
    DE102015211857.6A| DE102015211857A1|2014-06-27|2015-06-25|Bearing ring, method for producing such a ring and bearing containing such a ring|
    US14/751,205| US9677615B2|2014-06-27|2015-06-26|Bearing ring, method for manufacturing such a ring and bearing comprising such a ring|
    CN201510360073.6A| CN105221574B|2014-06-27|2015-06-26|Bearing race and its manufacturing method and bearing including the circle|
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