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
  • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
  • F16C41/007—Encoders, e.g. parts with a plurality of alternating magnetic poles
• • 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
  • F16C33/80—Labyrinth sealings
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
  • G01P1/00—Details of instruments
  • G01P1/02—Housings
  • G01P1/026—Housings for speed measuring devices, e.g. pulse generator
• • G—PHYSICS
  • G01—MEASURING; TESTING
  • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
  • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
  • G01P3/42—Devices characterised by the use of electric or magnetic means
  • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
  • G01P3/443—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in 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
  • 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
  • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
  • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls

Definitions

• the invention relates to the field of instrumented bearings intended to detect the parameters of rotation, for example the angular velocity, the displacement, etc., of an element integral with the rotating ring of the bearing.
• such instrumented bearings comprise the actual bearing on which is fixed a sensor unit comprising a sensor cooperating with an encoder element fixed on a rotating part of the bearing or on a part connected to the rotating ring of the bearing.
• the sensor unit is often made of injection molded plastic and houses the sensor or sensors electrically connected to a signal processing circuit board.
• the sensor unit often includes a connector for outputting signals from the instrumented bearing to an external signal operating system.
• a ring of tongues provided with hooks or a continuous annular rib which is mounted inside a groove of said non-rotating ring.
• FR-A-2 723 621 which describes an instrumented bearing provided with such a sensor block.
• This device has the particular disadvantage of comprising a sensor block which is provided with a region axially bearing against a radial front surface of the non-rotating race of the bearing. This can be particularly troublesome, especially for bearings of reduced dimensions, for which we use this front surface as a reference surface bearing against a shoulder or other surface of an associated housing.
• the object of the invention is to remedy these drawbacks.
• the invention also aims to provide an instrumented rolling device particularly easy to assemble, simple and economical.
• the present invention also aims to provide an instrumented rolling device with a limited risk of separation of the constituent elements.
• the instrumented rolling device comprises a rotating ring, a non-rotating ring, and a detection assembly provided with a sensor unit comprising an outer annular portion and an axial retaining means of the sensor unit on the non-rotating ring disposed on the annular portion. external.
• the outer diameter of the outer annular portion is smaller than the inside diameter of a front radial surface of the non-rotating ring.
• a bearing which comprises, after mounting of the sensor unit, a non-rotating ring having a completely clear radial front surface.
• the outer annular portion of the sensor unit is devoid of element located radially between an inner edge and an outer edge of the non-rotating ring, and axially outside the bearing.
• the front side surface of the non-rotating ring remains completely free, which greatly facilitates the mounting of the bearing inside the associated housing.
• the axial retention means comprises a circumferentially continuous radial rib engaging frictional engagement with a groove of the non-rotating ring.
• the rib comprises a chamfer having an angle of inclination less than or equal to that of an entrance chamfer of the groove. This facilitates the penetration of the rib inside the bearing, and more particularly inside the groove of the non-rotating ring, and the introduction of the sensor block.
• the outer annular portion includes a front surface at least a portion of which is in frictional contact with the groove and a retaining surface of which at least a portion is in frictional contact with the groove. Said surfaces form means for holding the sensor block in position on the non-rotating ring.
• the front surface of the outer annular portion and the rib constitute the relative locking means of the sensor block and the non-rotating ring.
• the sensor unit is provided with an inner annular portion forming a narrow passage with a radial front surface of the rotating ring, and a radial portion disposed between the inner annular portion and the outer annular portion.
• the rib, the radial portion and the inner and outer annular portions define a sealed annular space for a sensor.
• the non-rotating ring comprises an additional groove identical to the groove associated with the rib, and inside which is mounted a sealing flange.
• the sensor unit comprises a connector and at least one positioning element inside which the connector is mounted. I / positioning member extends axially with respect to a radial portion of the sensor block, in the opposite direction to the rings.
• the positioning member has an outer diameter smaller than the inside diameter of the front radial surface of the non-rotating ring.
• the sensor block comprises a printed circuit board, a radial portion of said partition sensor block being disposed between the connector and the printed circuit board.
• the sensor block is made of polybutylene tetraphatalate, preferably filled with mineral fibers, for example glass fibers.
• the instrumented rolling device comprises a concentric rotating ring and a non-rotating ring, each equipped with a raceway, a row of rolling elements arranged between the raceways, and a detection assembly provided with a sensor block.
• the detection assembly comprises an insert connector provided with pins and a rear face in contact with a first face of the sensor unit, and a printed circuit board in contact with a second face of the sensor unit opposite to the first.
• the connector pins pass through openings in the printed circuit board and in the sensor block between the first and second faces. Seams provide the axial connection between the connector and the printed circuit board while maintaining in axial contact the connector, the sensor block and the printed circuit board.
• the connector and printed circuit board can be used for bearings of different diameters.
• the bearing itself can be standard type, deep groove, manufactured in very large series. This provides a versatile product, modular and simple structure, using standardized elements.
• the sensor unit comprises a partition disposed between the connector and the printed circuit board.
• the axial connection between the connector and the printed circuit board thus acts like a rivet holding the connector, the sensor block partition and the printed circuit board together.
• the printed circuit board may be in contact with an inner radial face of the partition.
• the printed circuit board supports at least one sensor for cooperating with an encoder element attached to the rotating ring.
• the encoder element can be attached to a rotating part integral with the rotating ring.
• the sensor unit comprises a radial annular portion, an outer axial annular portion and an inner axial annular portion.
• the radial annular portion is disposed between the outer and inner axial annular portions.
• the sensor block has a C shape in axial section.
• the radial annular portion may form the partition disposed between the connector and the printed circuit board.
• the sensor unit can be formed integrally, for example by injection molding.
• the sensor unit comprises an axial retaining tab of the printed circuit board.
• the sensor unit comprises at least one positioning element of the connector, said positioning element being disposed on the first face of the sensor unit. This facilitates the assembly of the connector and the sensor block.
• the diameter of the sensor block is smaller than the large diameter of the radial lateral face of the ring supporting the sensor unit. The radial size of the detection assembly remains low.
• the sensor unit comprises at least one retaining lug of the printed circuit board, said lug coming from an inner wall of the sensor unit and extending radially to come into contact with the printed circuit board. .
• the sensor unit may comprise two retaining pins of the radially extending circuit board, one inwardly and the other outwardly, for contacting the printed circuit board.
• At least one opening is provided in a wall of the sensor unit to increase the radial flexibility of the sensor unit.
• the opening may be provided near the or lugs to facilitate the axial movement of the printed circuit board relative to the sensor unit during the pre-assembly of these two elements.
• the invention also relates to an instrumented bearing mounting method, comprising a concentric rotating ring and a non-rotating ring, each provided with a raceway, a row of rolling elements arranged between the raceways, and a set detection device with a sensor block.
• a connector with pins is reported, the connector pins passing through holes in the sensor block between two opposite faces of the sensor unit, a rear face of the connector being in contact with a first face of the sensor unit, there is a printed circuit board in contact with a second face of the sensor unit, the connector pins passing through orifices in the printed circuit board, and the connector and the printed circuit board are axially connected by soldering points while maintaining in axial contact the connector, the sensor unit and the printed circuit board.
• a detection assembly comprising numerous standard elements independent of the type and of the rolling diameter and which can be fixed on the snap bearing in an axial movement that is relatively easy to automate.
• the printed circuit board is brought by an axial movement in the sensor unit, which causes the temporary spacing of retaining lugs of the sensor block that can move radially, then the return to the initial position, thus ensuring a maintenance of the printed circuit board relative to the sensor unit before the solder connection.
• the radial portion of the sensor unit comprises, on its second face, at least one rib.
• Said rib provides a stiffening of the sensor block and allows a relatively coarse first positioning of the printed circuit board in its mounting area. It is of course possible to provide a greater number of ribs extending angularly and / or radially.
• the ribs may also have a chamfer facilitating the angular positioning of the printed circuit board to its final position.
• FIG 1 is an axial sectional view of an instrumented bearing according to I-I of Figure 3;
• FIG 2 is a perspective view of the bearing of Figure 1;
• FIG. 3 is a front view in elevation of the detection assembly of the bearing of FIG. 1;
• FIG. 4 is a perspective view of the sensor unit of the bearing detection assembly of FIG. 1;
• FIG 5 is a detail view of the axial section of FIG 1.
• the instrumented rolling bearing 1 comprises a bearing 2 and a detection assembly 3 associated with the bearing 2.
• the bearing 2 comprises an outer ring
• an inner ring 5 a row of rolling elements 6, here balls, a cage 7 for maintaining the regular circumferential spacing of the rolling elements 6 and a sealing flange 8 fixed in a groove 9 of the outer ring 4 and forming a narrow passage with an axial bearing of the inner ring 5.
• the rings 4 and 5 each comprise a race 4a, 5a, respectively on their bore and on their axial outer surface.
• the races 4a and 5a have a toroidal shape and can be formed by machining a tube portion or an annular blank.
• the outer ring 4 also comprises two grooves 9 and 10, close to radial front surfaces of said ring 4.
• the grooves 9 and 10 are symmetrical to each other with respect to a plane passing through the center of the rolling elements 6.
• the rings 4 and 5 are symmetrical with respect to a plane passing through the center of the rolling elements 6.
• the rings 4 and 5 each comprise a front radial surface 4b, 5b on the side of the groove 10.
• the radial front surfaces 4b and 5b are substantially coplanar.
• the rings 4 and 5 may also each comprise a frontal radial surface, these surfaces being substantially coplanar.
• the ring 5 comprises a cylindrical bore 5c and the ring 4 comprises a cylindrical axial outer surface
• the outer ring 4 and the inner ring 5 are concentric.
• the detection assembly 3 is fixed in the groove 10 and has a smaller radial size than the bearing 2.
• the detection assembly 3 has an outer surface of smaller diameter than the outer surface 4c of the outer ring 4 and a bore of diameter greater than the bore 5c of the inner ring 5.
• the detection assembly 3 comprises a sensor unit 1 1, a connector 12 and a printed circuit board 13.
• the sensor unit 11 has a generally annular shape with a C section with a branch or radial portion l ia disposed between a branch or axial portion of large diameter l lb and a branch or axial portion of small diameter I l e.
• the axial branch of small diameter binds has a length less than that of the axial branch of large diameter 1 lb.
• the axial leg of large diameter l lb is provided at its free end, on its outer surface, a bead or rib 1 Id, preferably circumferentially continuous, projecting into the groove 10 of the outer ring 4 and thus ensuring the maintenance of the sensor block 1 1 relative to the outer ring 4, while leaving free the radial surface 4b of the ring 4.
• the outside diameter of the axial portion of large diameter 1 1b is smaller than the inside diameter of the front radial surface 4b of the ring 4.
• the portion of the large diameter portion 1 1b located axially outside of the bearing 2 is devoid of elements extending radially projecting outwards. This portion thus has an outer surface free of asperities, i.e. substantially smooth.
• the annular axial portion of large diameter 11b leaves the radial surface 4b of the outer ring 4 completely free, so that it can be used as a reference surface and bear in a shoulder or other internal radial surface an associated dwelling.
• said rib Hd comprises a chamfer I 1, here produced in the form of a frustoconical surface extending inwardly, which has an inclination angle less than or equal to that of a chamfer 4d disposed at an axial end of the ring 4.
• the chamfer I connects it to an inclined surface 11g of the rib H d. Thanks to the chamfer H e, it facilitates not only the penetration of the rib Hd inside the groove 10 but also the introduction of the sensor block 11 on the non-rotating ring 4.
• the angle of inclination of chamfer I here it is of the order of 25 °, while the chamfer 4 is approximately 45 °.
• angle of inclination here, the angle formed by the surface of the chamfer and a surface extending horizontally, for example the outer surface of the axial portion of large diameter H b.
• a small-diameter edge of the chamfer I 1 of the rib 1 I d is connected to a substantially radial front surface H f of the large-diameter axial portion 11 b, which comes into contact with a substantially radial wall 10 a of the axial groove 10.
• the front surface H f here is entirely in axial abutment against the wall 10a of the groove 10.
• only a portion of the front surface H f can bear against said wall 10a.
• the rib H d comes into contact with a wall 10b of the groove located axially on the chamfer side 4d.
• the walls 10a and 10b converge radially toward a bottom 10c of the groove 10.
• the outer annular axial portion 1b of the sensor block 11 thus cooperates by frictional contact with the groove 10. through the rib 1 I d and the radial front surface H f.
• the rib Hd of the axial portion of large diameter 1b interferes with two walls 10a and 10b of the groove 10 opposite axially.
• the centering and the axial positioning of the sensor unit 1 1 are therefore carried out solely thanks to the groove 10 of the outer ring 4 of the bearing, without it being furthermore necessary to bear against the radial front surface 4b of said ring.
• the front surface 1 thus forms a stop surface for the axial positioning of the sensor unit 1 1 against the groove 10 of the outer ring 4, and the surface 11 g forms a retaining surface of the rib H d inside the said groove 10.
• the abutment front surface 11 and the wall 10a of the groove 10 on the one hand, and the retaining surface 11g and the wall 10b of said groove on the other hand, co-operate to frictionally achieve the centering and the angular immobilization of the sensor unit 11 inside the groove 10.
• the front surface Hf and the retaining surface 11g of the rib Hd form means for holding the sensor block 11 relative to the ring 14, in the axial, radial and circumferential directions, cooperating with holding means complementary to said ring formed by the walls 10a and 10b.
• the small diameter axial branch I forms a narrow passage with the radial front face 5b of the inner ring 5.
• the sensor block 11 defines an annular space open towards the bearing 2. More specifically, the annular space is delimited by the axial portion of large diameter 11b, the axial portion of small diameter I and the radial portion 11a connecting said portions.
• the printed circuit board 13 is disposed in the bottom of said annular space in contact with the radial portion 11a of the sensor unit 11.
• the printed circuit board 13 supports at least one sensor element 14, for example of the Hall effect type.
• the sensor unit 11 further comprises a positioning element 15 intended to cooperate with the connector 12.
• the positioning element 15 is in the form of a hollow parallelepiped defining a rectangular space in which the connector 12 is arranged.
• positioning element 15 protrudes axially with respect to the radial portion 11a of the sensor unit 11, in a direction opposite to the rolling bearing 2.
• the positioning element 15 occupies a limited angular sector, unlike the rest of the annular sensor unit 11.
• the positioning element 15 extends axially over a length much shorter than that of the connector
• the positioning element 15 thus defines an open housing for the connector 12. This housing is completed by an opening 17 arranged through the radial portion 11a of the sensor unit 11 and thus opening into the space where the printed circuit board 13 is disposed. Holes 18 are provided in the printed circuit board. 13, so as to come opposite the opening 17 once the card is in place.
• the sensor unit 1 1 can be obtained by injection molding of a synthetic material.
• the connector 12 includes an insulating portion 19 and a plurality of conductive pins 20.
• the insulating part 19 has an overall rectangular parallelepiped shape inserted between the positioning element 15 of the sensor unit 1 1 and in contact with the radial wall 1 i a.
• the insulating portion 19 is open on its radial face opposite to the radial wall l i a of the sensor unit 1 1 to have a concavity allowing the insertion of an electrical plug.
• the pins 20 pass through the opening 17 formed in the radial wall 11a and the holes 18 formed in the printed circuit board 13 and are slightly projecting beyond the printed circuit board 13 while being fixed thereto. by a weld 21, for example tin type.
• the pins 20 of the connector 12 thus form an axial mechanical connection between the insulating part 19 of the connector 12 on one side of the radial wall 11a and the printed circuit board 13 on the other side.
• the insulating portion of the connector 19 and the printed circuit board are thus kept axially in contact with said radial portion 1 i a which forms a partition wall.
• an encoder element 22 is fixed on the inner ring 5. More precisely, the encoder element 22 comprises a support 23, by for example, an L-shaped sheet metal cup fitted on a radial outer surface of the outer ring 5, on the side of the detection assembly 3.
• the support 23 comprises an axial portion fitted and a radial portion directed outwards from of the axial portion.
• the encoder element 22 is completed by an active part
• the active part 24 can be in the form of a ring
• the active part 24 is slightly projecting axially relative to the inner ring 5 and is radially disposed in the space delimited by the axial portions of large diameter 1 1b and small diameter lie of the sensor unit 1 1.
• the active part 24 is separated from the sensor 14 by a small axial gap.
• the encoder 22 leaves the radial surface 5b of the ring 5 free.
• a radial air gap could be provided with a sensor 14 disposed inside or outside the active part
• the printed circuit board 13 occupies a limited angular sector of the annular space defined by the sensor unit 1 1. It is desirable to guide the printed circuit board 13 angularly with respect to the sensor block 1 1 during assembly.
• the sensor unit 11 comprises a plurality of ribs 25 projecting radially from the internal face of the radial portion 11a, in other words projecting towards the bearing 2.
• the ribs 25 may have arcuate portions and / or radial or oblique portions.
• the ribs 25 leave a single angular space sufficient to house the integrated circuit card 13.
• the ribs 25 are connected by short radial portions to the axial portion of small diameter, which they thus contribute to stiffening.
• the ribs 25 also make it possible to increase the rigidity of the radial portion li a.
• the ribs 25 thus provide both a role of stiffening the sensor block 1 1 as a whole and coarse angular positioning of the integrated circuit card 13.
• the ribs 25 are three in number and leave between two small angular sectors insufficient to receive the integrated circuit card 13 and a larger angular sector slightly larger than that required for the printed circuit board 13. The angular positioning of the printed circuit board 13, whether done automatically or manually, is simplified.
• the sensor unit 1 1 comprises two lugs 26 and 27, radially projecting respectively outwardly and inwardly from the axial portion of small diameter l i e and the axial portion of large diameter 11b.
• the lugs 26 and 27 are in the form of a rounded protuberance protruding slightly and thus reduce the radial space available for the insertion of the printed circuit board 13.
• the lugs 26 and 27 are arranged opposite each other in the angular sector intended to receive the printed circuit board 13.
• the lugs 26 and 27 extend axially over a portion of the axial length of the axial portions 1 1b and I l e.
• two local openings 28 in the form of a circular arc or circumflex accent are formed in the radial portion 11a, angularly at the lugs 26 and 27.
• the axial portions 1 lb and 1c thus have a much higher radial elasticity, which allows the lugs 26 and 27 to move slightly apart when the circuit board 13 passes through an axial movement when of its assembly, then to resume their original position, thus ensuring a maintenance of the printed circuit board 13 during its assembly and before soldering.
• the connector 12 may be assembled with the sensor unit 1 1, before or after the pre-assembly of the integrated circuit card 13, and may be temporarily retained by virtue of the positioning element 15 which, by its shape, has a very slight flexibility allowing it to exert sufficient friction on the insulating part 19 of the connector 12. It is then possible to form the soldering points 21, while slightly tightening the connector 12 and the integrated circuit card 13 against the wall radial lia which forms a partition wall between these elements. Once the weld has been performed, the detection assembly 3 is in the form of a non-removable system and presents a risk of losing a particularly small part.
• the hole 17 allowing the passage of the pins 20 through the radial portion 11a is angularly offset relative to the lugs 26 and 27 and with respect to the openings 28, which allows, d ' on the one hand, to avoid a too pronounced weakening of the sensor block 1 1 which would be caused by an excessive proximity of the bore 17 and the openings 28 which are all formed in the radial wall 11a and, on the other hand, to ensure a restraint effective of the integrated circuit card 13 which has a certain angular dimension and which is retained axially at one end by the welds 21, and at the other end by the pins 26 and 27. It is thus avoided that excessive torsional forces do not are applied to the printed circuit board 13.
• the welds 21 and the pins 20 thus provide a dual function of electrical connection for the signal transmission from the sensor 14 or an electronic processing circuit on the one hand, and mechanical connection on the other hand, to hold together the connector 12, the sensor unit 11 and the printed circuit board 13.
• Standard connectors manufactured in very large series and therefore low cost can be used.
• the printed circuit board may also be suitable for several standard bearing sizes. Only the sensor unit is adapted to the size of the bearing.
• the set of detections is well suited to the use of conventional single row ball and deep groove type bearings, using the groove 10 of the bearing 2 initially provided for mounting a seal.
• the bead or rib Hd which allows to fix the sensor block 11 to the groove 10 of the outer ring, can be obtained by molding, and this relatively economically.
• the centering and the axial positioning of the sensor unit 11 can only be carried out thanks to the groove 10 of the outer ring 4 of the bearing.
• the instrumented bearing is very compact radially and can be easily inserted into a housing.
• the sensor unit 11 leaves on the radial surface 4b of the outer ring 4 completely free, so that it can be used as a reference face and bear in a shoulder or other internal radial surface of the housing .
• the sensor block allows accurate positioning of the insert connector, thanks to the projecting housing formed on the outer front surface of the sensor unit.
• the axial portion of large diameter 1 1b being constituted by an annular thin wall which has a relatively large axial dimension, for example of the order of half of the axial dimension of the bearing 2, it is easily deformable radially inward which facilitates the mounting of the rib
• the annular axial portion of large diameter 11b tends to move outwardly, and is centered on the large diameter portion of the bore stage of the outer ring 4.
• the rib H d is thus preloaded radially against the groove 10, which makes it possible locally to form a tight connection between the sensor unit 1 1 and the outer ring 4.
• PBT polybutylene tetraphthalate
• This material offers both a good stability to moisture uptake and a good frictional adhesion to the steel, which favors effective fixing in the groove 10 of the sensor unit 11, including in the circumferential direction.
• the welds transmit the axial force to the integrated circuit board that bears against the radial partition of the sensor unit.
• the integrated circuit card remains perfectly positioned axially with very small risks of air gap variations between the sensor or sensors and the encoder ring, such air gap variations being likely to affect the reliability of the measurements.
• the sensors are suitably protected by the sensor block and by the narrow passage formed with the inner ring.
• an instrumented bearing provided with at least one means for generating a frictional force which makes it possible, by cooperation with the groove, to perform axial positioning and centering of the sensor unit relative to the ring. outer, so as to leave completely free a radial front surface of the outer ring, so that it can come fully supported in a shoulder of the housing associated with the bearing.

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• Engineering & Computer Science (AREA)
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• Mechanical Engineering (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)

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• 2006
  • 2006-10-18 FR FR0654351A patent/FR2900209B1/fr not_active Expired - Fee Related
• 2007
  • 2007-02-27 WO PCT/FR2007/000350 patent/WO2007122303A1/fr active Application Filing
  • 2007-02-27 EP EP07731054A patent/EP2008113A1/de not_active Withdrawn
  • 2007-02-27 US US12/226,467 patent/US20100098362A1/en not_active Abandoned
  • 2007-02-27 JP JP2009505925A patent/JP2009534602A/ja active Pending

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