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
  • F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
  • F16C13/006—Guiding rollers, wheels or the like, formed by or on the outer element of a single bearing or bearing unit, e.g. two adjacent bearings, whose ratio of length to diameter is generally less than one
• • 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
• • 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
• • 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
  • G01P3/446—Devices characterised by the use of electric or magnetic means for measuring angular speed mounted in bearings mounted between two axially spaced rows of rolling elements
• • 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
  • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
  • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
  • G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
• • 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
• • 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
  • F16C2316/00—Apparatus in health or amusement
  • F16C2316/30—Articles for sports, games and amusement, e.g. roller skates, toys
• • 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
  • F16C41/008—Identification means, e.g. markings, RFID-tags; Data transfer means

Definitions

• the present invention relates to the field of detection of the speed of rotation of a rotating element and can be applied in skates, wheeled boards, bicycles or scooters, in which a device for detecting the rotation of the wheels is provided.
• the inline skate wheels are mounted one behind the other on the lateral flanks of a support secured to a shoe.
• Each wheel is rotatably mounted on a fixed axle by means of two rolling bearings, said axle being secured at its ends to the sides of the support.
• coaxial wheel skates and wheeled boards are also known.
• Document FR-A-2 772 920 describes a device for detecting the speed of rotation of a wheel of an inline skate, the wheel being supported by rotating rings of two rolling bearings, the fixed rings of two bearings bearing being integral with an axis mounted on a support.
• the detection device comprises a sensor and an encoder arranged in a volume defined axially by the two rolling bearings and radially by the bore of the wheel.
• This type of assembly is generally satisfactory.
• the invention aims to facilitate the mounting of a sensor / encoder assembly in a rolling bearing, in particular in-line skating, skateboarding, scooter, etc.
• the invention advantageously applies to other applications to allow easy mounting of an encoder on a rotating part.
• the invention provides a device for detecting the speed of rotation in which the elements comprising the sensor means and the encoder means replace original elements or are mounted on original elements without requiring any modification of the rotating element or original parts remaining in the rotating element assembly.
• the device for detecting the speed of rotation is intended for a rotating element, of the type supported by at least one rotating outer ring of at least one rolling bearing, at least one non-rotating inner ring the rolling bearing being integral with an axis mounted on a support, the device comprising a non-rotating sensor means adjacent to the rolling bearing and a rotary encoder means.
• the encoder means is fixed at least in part by magnetization on a flange secured to the rotating ring and made of magnetizable material.
• the encoder means comprises at least one magnet extending over a part of the flange in a localized direction in the radial and circumferential direction and disposed in the immediate vicinity of a face of the flange oriented towards the sensor means so that the force of attraction enters the magnet and the flange participates in the retention of said coding means against said flange.
• an adhesive means can be arranged between the face of the flange and the encoder means.
• the flange can be a sealing flange mounted in an annular groove of the rotating ring and extending near the non-rotating ring.
• the rotating element is supported by rotating outer rings of two rolling bearings.
• Non-rotating inner rings of the two rolling bearings are integral with an axis mounted on a support.
• the detection device comprises a sensor means and an encoder means arranged in a volume defined axially by the two rolling bearings and radially by a cylindrical surface coaxial with the rolling bearings and of diameter equal to the outside diameters of the outer rings of the rolling bearings.
• the detection device can be easily adapted to a standard in-line skate that had previously been without detection means, by simple interchangeability of the elements or by mounting additional elements that do not require no modification of the original parts of the skate. The detection device is therefore very easy to use.
• the magnet is in contact with the flange.
• the magnet can be glued to the flange.
• the magnet can be embedded in an annular support.
• the annular support can be in contact with the flange.
• the annular support can be glued to the flange.
• the magnet is of the permanent type and is in the form of a pellet or a wafer made by sintering powder components. In order to have a magnet with high magnetic properties in a small volume, Samarium Cobalt (SmCo) magnets can be used, for example.
• SmCo Samarium Cobalt
• the annular support is made of flexible material.
• the annular support is centered on the wheel.
• the outside diameter of the annular support is slightly greater than the bore of the wheel.
• the annular support can be centered on a portion of the flange.
• the coding means comprises an active coding part and a magnetization means formed from the same material.
• the encoder means is formed from locally magnetized plastoferrite.
• the magnet is housed in a cell.
• the cell can be produced by overmolding a flexible material on the external face of the flange.
• the cell is of parallelepiped shape.
• the walls of the cell may be substantially perpendicular to a radial plane.
• the walls of the cell include an outwardly flared portion forming an inlet chamfer, a central portion essentially serving to retain the magnet, and an undercut portion toward the bottom of the cell.
• the device comprises a sealing lip formed from a flexible material.
• the device comprises a disc-shaped element made of said flexible material and having a substantially radial external face of the encoder means.
• the magnet can be flush with or set back from said face.
• the disc-shaped member is fixed in a groove in the rotating ring.
• the disc-shaped element has an inner edge forming a dynamic seal, rubbing or by narrow passage, with a bearing surface of the non-rotating ring.
• a device for detecting the speed of rotation is intended for a rotating element, of the type supported by at least one rotating outer ring of at least one rolling bearing, at least one non-rotating inner ring.
• the rolling bearing being integral with an axis mounted on a support, the device comprising a non-rotating sensor means adjacent to the bearing and a rotary encoder means.
• the encoder means is fixed to a flange secured to the rotating ring.
• the encoder means comprises a disc-shaped element provided with at least one cell, and at least one magnet housed in the cell.
• An encoder is intended for a device for detecting the speed of rotation of a wheel supported by at least one rotating outer ring of at least one rolling bearing, at least one inner ring not rotating of the rolling bearing being integral with an axis mounted on a support, the device comprising a non-rotating sensor means adjacent to the rolling bearing.
• the encoder comprises means for fixing at least in part by magnetization on a flange made of magnetizable material.
• the encoder means comprises at least one magnet extending over a part of the flange in a localized manner in the radial direction and circumferential and disposed in the immediate vicinity of one face of the flange oriented towards the sensor means so that the force of attraction between the magnet and the flange participates in the retention of said encoder means against said flange.
• the coder may include one or more magnets.
• An inline skate, a skateboard, a scooter or a bicycle includes a plurality of wheels. At least one wheel is supported by at least one outer rotating ring of at least one rolling bearing, at least one non-rotating inner ring of the rolling bearing being integral with an axle mounted on a support.
• the shoe comprises a device for detecting the speed of rotation of the wheel comprising a non-rotating sensor means adjacent to the bearing and a rotating encoder means.
• the encoder means is fixed at least in part by magnetization on a flange secured to the rotating ring and made of magnetic material.
• the encoder means comprises at least one magnet disposed in the immediate vicinity of a face of the flange oriented towards the sensor means so that the force of attraction between the magnet and the flange participates in the retention of said encoder means against said flange.
• a rotating battery or generator can be provided.
• the sensor means and the encoder means can be put in place while retaining the original structure and shape of the wheel. There is thus a pad whose detection device is particularly well protected against external pollution and impact and whose wheels can be changed while retaining the same detection device which can even be mounted on a pad which was not provided therewith. originally.
• Figure 1 is an axial sectional view of an inline skate wheel equipped with a detection device according to the invention, the sensor unit being shown in external view in the upper part of the figure;
• Figure 2 is an axial sectional view of the encoder means of the wheel of Figure 1;
• Figure 3 is a front elevation view of the encoder means of Figure 1;
• Figure 4 is a detail view of Figure 1 illustrating the mounting of the encoder means;
• Figure 5 is an axial sectional view of a bearing according to another embodiment of the invention;
• Figure 6 is an axial sectional view of a bearing according to another embodiment of the invention;
• FIG. 7 is a front elevation view of an encoder means according to another embodiment of the invention
• Figure 8 is an axial sectional view of a bearing provided with the encoder means of Figure 7
• Figure 9 is an axial sectional view of the encoder means of Figure 7
• Figure 10 is an axial sectional view of a bearing according to another embodiment of the invention
• Figure 11 is a partial front view in elevation of the encoder means of the bearing of Figure 10;
• FIG. 12 is a view in axial section of an inline skate wheel fitted with a detection device according to another embodiment of the invention, the sensor unit being shown in external view in the upper part of the FIG;
• Figure 13 is a partial detail view of Figure 12;
• Figure 14 is a half view in axial section of the encoder means of Figure 12 during assembly;
• Figure 15 is a partial front view in elevation of the encoder means of Figure 12;
• Figure 16 is a perspective view of the encoder means of Figure 12, before mounting of the magnet.
• the wheel 1 of an in-line skate is provided with a bore 2 extending at each end by a cylindrical mounting surface 3 and 4 shouldered for the rolling bearings 5 and 6.
• the two mounting surfaces 3 and 4 are concentric with the axis of rotation of the wheel and are of an identical diameter, greater than the bore of the wheel 1.
• the rolling bearings 5 and 6 are identical and include a ring outer rotating 7 provided with a rolling track 8, an inner non-rotating ring
• each rolling bearing is mounted by means of its cylindrical outer surface 7a in the corresponding cylindrical mounting surface 3 or 4 of the wheel 1.
• the wheel 1 is in one piece, the bore 2 and the rolling surface the being part of the same room.
• the inner rings 9 of the rolling bearings 5 and 6 are supported by a sleeve-shaped spacer 13 provided at each end with a shouldered cylindrical bearing 14 and 15 for mounting the rolling bearings 5 and 6.
• the spacer 13 is mounted on an axle 16 protruding from both sides of the spacer 13 and of the wheel 1.
• the portions of the axle that protrude from the spacer 13 pass through the bores 17 provided in each sidewall 18 and 19 of a support 20.
• the axis 16 is held in place on one side by a head 21 and on the other side by a screw 22 which has been screwed at the end of the axis 16 and which is provided with a wide head 23 of diameter greater than that of the bore 17 of the sidewall 19 of the plate 20 and coming to bear against a radial surface of said sidewall 19 thus blocking the axis 16.
• the rolling bearing 6 is provided on each side of the row of rolling elements 11 with sealing elements in the form of flanges 24 and 25.
• the sealing flange 24 is arranged on the side outside while the sealing flange 25 is disposed on the inside and faces the rolling bearing 5.
• the rolling bearing 5 is also provided with seals in the form of outer 26 and inner 27 flanges. tightness 24 to 27 are made from a sheet metal side comprising a hooking portion in a groove of the corresponding outer ring, a radial portion extending inward and a short cylindrical portion disposed nearby an outer cylindrical surface of the corresponding inner ring.
• the spacer 13 is made of synthetic material and has a general shape of revolution with thin portions corresponding to the cylindrical bearings 14 and 15 and a central portion 13b of greater thickness, extending radially outward to proximity of the bore 2 of the wheel 1, between the rolling bearings 5 and 6.
• the bore 13a of the spacer 13 is in contact with the external surface of the axle 16.
• a sensor 28 In the central portion 13b which forms a sensor holder block, are arranged a sensor 28, a transmitter 29 and a battery 30 connected by electrical connections.
• the transmitter 29 and the battery 30 are embedded in the synthetic material of the central portion 13b.
• the sensor 28 is inserted into said synthetic material while being flush with an annular radial surface 13c disposed opposite the flange 27 of the rolling bearing 5.
• An encoder element 31, of annular shape, is fixed to the radial portion of the sealing flange 27 of the rolling bearing 5.
• the encoder element 31 has an outer cylindrical surface 32 in contact with the bore 2 of the wheel 1, a radial surface 33 in contact with a corresponding front surface 7b of the outer ring 7, a radial surface 34 in contact with the radial portion of the sealing flange 27, and a radial surface 35 disposed opposite the sensor 28 and with a small air gap relative to the latter.
• the encoder element 31 comprises two magnets 36 and 37 allowing it to be fixed on the radial portion of the sealing flange 27 which is made of ferro-magnetic sheet.
• the magnets 36 and 37 are embedded in the synthetic material forming the encoder element 31, centered in the bore 2 of the wheel 1 and coming to bear against the metal sealing flange.
• a magnetosensitive sensor is used, for example a Hall effect probe.
• the active part of the encoder element can be made of locally magnetized plastoferrite.
• the mounting operation is particularly simple since it suffices to introduce the encoder element into the bore of the wheel and bring it into contact with the metal flange.
• the encoder element 31 being centered relative to the bore. 2 of the wheel, the magnets are perfectly positioned radially with respect to the flange.
• the magnets 36 and 37 coming into contact with the flange, create an axial adhesion force which is sufficient to hold said coding element against the rotating part of the bearing, the flange being integral with the outer ring 7, itself integral with the wheel 1.
• connection between the flange and the coding element by an adhesive predisposed on the radial surface 34 of the coding element 31 and / or by providing a slight diametrical interference between the cylindrical external surface 32 of the encoder element 31 and the bore 2 of the wheel 1 to create an additional connection by slightly tight fitting.
• the coding element can comprise a single magnet or, on the contrary, a number of magnets greater than two. It is also possible to provide, diametrically opposite to the magnets, non-magnetized bodies but with identical masses in order to avoid the formation of imbalances.
• FIG. 4 we can see how we can mount an encoder element 31 on a wheel 1 already equipped with a rolling bearing 5. After removing the other bearing, we bring the encoder element by an axial movement in coming from the opposite side to level 5. We do it slide along the bore 2 of the wheel 1 until the magnet 36 comes into contact with the sealing flange 27.
• the encoder element 31 is similar to that of the previous embodiment, except that it is provided with a centering surface 38, cylindrical, capable of cooperating with the fold for crimping the flange which projects from the flange support groove formed in the outer ring 9.
• the outer diameter of the encoder element 31 is reduced compared to that of the previous embodiment and no longer comes into contact with the bore 2 of the wheel 1.
• the radial surface 34 comes into contact with the radial portion of the sealing flange 27.
• a magnet 36 is directly bonded to the metal flange 27 of the rolling bearing 5 before the latter is put into place in the wheel 1.
• the magnetization associated with the adhesive power of the glue is sufficient to ensure the joining of the flange 27 and the magnet 36.
• the magnet 36 also forms the active part of the coding element.
• the coding element consists only of one or more magnets fixed to the flange 27 by magnetization and bonding.
• the magnetic characteristics of the magnet form both a means of attachment to the flange and a means of generating a signal which the sensor is able to detect.
• the coding element 31 is formed by a flexible disc of small thickness, the radial face 34 of which is adhesive, for example by being pre-coated with an adhesive. Two magnets 36 and 37 are inserted in the flexible disc. The encoder element 31 is fixed by gluing and magnetization on the radial portion of the sealing flange 27.
• FIGS. 7 to 9 the embodiment illustrated in FIGS. 7 to 9, the coding element 31 is formed by a flexible disc of small thickness, the radial face 34 of which is adhesive, for example by being pre-coated with an adhesive.
• Two magnets 36 and 37 are inserted in the flexible disc.
• the encoder element 31 is fixed by gluing and magnetization on the radial portion of the sealing flange 27.
• the sealing flange 26 is replaced by an annular rubbing seal 39 comprising a part flexible 40, for example made of elastomer, extending at one end in the groove of the outer ring 7 and at the opposite end, here inner, rubbing by a lip 41 on a outer cylindrical part of the inner ring 9, and a metal frame or flange 42 disposed on the side of the rolling elements 11, integral with the flexible part 40, and giving it the necessary rigidity.
• a part flexible 40 for example made of elastomer
• the flange 27 is replaced by an annular rubbing seal 43 close to the seal 39, except that the flexible part 40 has at least one axial protuberance 44 arranged locally and hollowed out in its central part to form a cell 45 open from the side outside the 'opposite of the rolling elements, and the bottom of which is formed by the frame or flange 42 or by a thin film of elastomer adhered to the frame 42.
• a magnet 36 is placed in the cell 45 and is held there by magnetization with the frame 42 which will advantageously be made of ferro-magnetic material, steel sheet for example.
• the protrusion 44 and the cell 45 are produced by overmolding of flexible material on the frame of the seal 42 at the same time as the other parts of the seal.
• the cell 45 extends in a localized manner by occupying a determined annular sector of the flexible part 40, at least in the circumferential direction.
• a slight interference may be provided between the magnet 36 and the axial walls 45a of the cell 45 in order to reinforce or completely maintain the magnet 36.
• the magnet 36 can be additionally glued.
• the positioning of the magnet 36 is ensured by the cell 44 in the radial and circumferential direction.
• the disc is made rigidly, or else that it is made from a magnetizable material, for example plastoferrite, the magnet then forming an integral part of the material constituting the disc and being produced from an area of said locally magnetized material.
• a transformation kit comprising the encoder element carrying the magnet and the spacer comprising a sensor and a transmitter.
• the encoder element is then placed against one of the rolling bearings and the spacer between the two rolling bearings.
• the pad is ready to operate by transmitting a signal representative of the speed of rotation of the wheel, which signal can then be collected and used on a receiver such as a wristwatch.
• a device for detecting the speed of rotation of a wheel supported by at least one rotating outer ring of at least one rolling bearing, at least one non-rotating inner ring of the rolling bearing being secured to a axis mounted on a support comprises a non-rotating sensor means adj acent to the bearing and a rotating encoder means.
• the encoder means is fixed on a support integral with the rotating ring.
• the encoder means comprises at least one magnet extending over a part of the support in a localized manner in the radial and circumferential direction and disposed in the immediate vicinity of a face of the support oriented towards the sensor means.
• the magnet is housed clamped in a cell of the support so that the clamping force participates in the retention of said encoder means against said flange.
• the support can be provided with a sealing means.
• This embodiment is illustrated by figs 12 to 16 in which the references of elements similar to those of the previous figures have been kept. This embodiment is close to that illustrated by FIGS. 10 and 11 except that the metal frame or flange 42 disposed on the side of the rolling elements 11 has a flat main part and an outer rim slightly bent towards the plane defined by the center of the rolling elements. Only the flexible part 40 is in contact with the outer ring 7.
• the flexible part 40 comprises, in addition to a bead 46 disposed in the groove of the outer ring 7, a double sealing lip 47 in contact with friction with a cylindrical bearing surface of the inner ring 9, and a central body 48 in the form of a disc formed mainly radially at the level of the main plane part of the frame or flange 42.
• the central body 48 s extends radially substantially between the bore of the outer ring 7 and the cylindrical surface of the inner ring 9.
• the central body 48 comprises a flat outer surface 49, generally substantially radial, on the side opposite to the rolling elements 11.
• the cell 45 is formed in the central body 48 which is here devoid of protuberance for this purpose.
• the cell 45 here reaches the frame or flange 42, which promotes retention by magnetization, but without this being essential.
• the magnet 36 of rectangular shape is disposed in the cell 45 and is held there by clamping the walls of the cell on the magnet. Said walls are generally perpendicular to a radial plane in their central part 45a. In the free state, the magnet 36 is slightly larger in the radial and / or circumferential direction than the cell 45, which ensures a tightening in the mounted state sufficient to hold the magnet in place. At the entry of the cell, the walls widen towards the outside of the joint to form an entry chamfer 45b facilitating the introduction of the magnet 36.
• the walls of the cell also go slightly widening when we move from the central part 45a towards the frame 42 to form an undercut 45c allowing the joint to freely penetrate to the bottom of the cell without risking to be hindered by the formation of a rubber bead.
• the armature or flange 42 is made of magnetic material, the magnetic attraction between the magnet and the armature or flange 42 will also help to maintain the magnet.
• the use of a frame or flange 42 of non-magnetic material, in particular of rigid synthetic material can be envisaged.
• the magnet 36 is flush with the flat outer surface 49 of the central body 48.
• the magnet can be slightly recessed with respect to the flat outer surface 49.
• the device according to the invention has been illustrated by an application in a skate wheel but can of course be applied to any rotating device for which the detection of angular movement does not require very high precision and can be carried out on the base one or a few pulses per revolution. The invention may therefore also apply to the wheels of skateboards, scooters or bicycles, these examples being in no way limiting.

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• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Mechanical Engineering (AREA)
• Rolling Contact Bearings (AREA)
• Transmission And Conversion Of Sensor Element Output (AREA)

Applications Claiming Priority (5)

Publications (1)

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• 2001
  • 2001-10-23 FR FR0113683A patent/FR2820476B1/fr not_active Expired - Fee Related
• 2002
  • 2002-01-30 WO PCT/FR2002/000359 patent/WO2002063311A1/fr active Application Filing
  • 2002-01-30 JP JP2002563005A patent/JP2004522963A/ja active Pending
  • 2002-01-30 US US10/467,404 patent/US7033080B2/en not_active Expired - Fee Related
  • 2002-01-30 EP EP02701351A patent/EP1356305A1/de not_active Withdrawn

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