EP2564209A1 - Instrumented assembly and associated locking plate - Google Patents

Instrumented assembly and associated locking plate

Info

Publication number
EP2564209A1
EP2564209A1 EP11730718A EP11730718A EP2564209A1 EP 2564209 A1 EP2564209 A1 EP 2564209A1 EP 11730718 A EP11730718 A EP 11730718A EP 11730718 A EP11730718 A EP 11730718A EP 2564209 A1 EP2564209 A1 EP 2564209A1
Authority
EP
European Patent Office
Prior art keywords
skirt
washer
cap
rocket
encoder ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP11730718A
Other languages
German (de)
French (fr)
Inventor
Gérard Ballas
Gilles Landragin
Vivien Pollier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN SNR Roulements SA
Original Assignee
NTN SNR Roulements SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by NTN SNR Roulements SA filed Critical NTN SNR Roulements SA
Publication of EP2564209A1 publication Critical patent/EP2564209A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F15/00—Axle-boxes
    • B61F15/20—Details
    • B61F15/26—Covers; Sealing thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61K—AUXILIARY EQUIPMENT SPECIALLY ADAPTED FOR RAILWAYS, NOT OTHERWISE PROVIDED FOR
    • B61K9/00—Railway vehicle profile gauges; Detecting or indicating overheating of components; Apparatus on locomotives or cars to indicate bad track sections; General design of track recording vehicles
    • B61K9/04—Detectors for indicating the overheating of axle bearings and the like, e.g. associated with the brake system for applying the brakes in case of a fault
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • 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
    • G01P3/48—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
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B39/00—Locking of screws, bolts or nuts
    • F16B39/02—Locking of screws, bolts or nuts in which the locking takes place after screwing down
    • F16B39/10—Locking of screws, bolts or nuts in which the locking takes place after screwing down by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the bolt
    • F16B39/108—Locking of screws, bolts or nuts in which the locking takes place after screwing down by a plate, spring, wire or ring immovable with regard to the bolt or object and mainly perpendicular to the axis of the bolt with a locking washer under the nut or bolt head having at least one tongue or lug folded against the nut or bolt head, or against the object itself
    • 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
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/10—Railway vehicles

Definitions

  • the invention relates to the field of shafts or axles with instrumented bearings. These bearings are large and support high loads.
  • the instrumentation of such bearings consists in mounting speed and / or temperature and / or vibration sensors generally on the fixed part of the bearing; the mobile part of the instrumentation is mounted on the other ring of the bearing. More specifically, the present invention is an instrumented bearing assembly for axle and rocket cap and a lock washer for such an assembly.
  • baffle or deflectors are additional specific parts that are added to the existing parts (spacers, encoder, sensor ...) necessary for the operation of such instrumentation.
  • this assembly requires a deflector in several parts, which is complex and expensive. Parts of the deflector have areas of mechanical weakness, which is problematic because in the applications envisaged, significant mechanical loads are exerted on the bearings and associated parts.
  • FIG. 1 illustrates a lock washer may be part of a mounting of this type; it comprises a sheet of substantially triangular outer shape and provided with three orifices close to each of the vertices of the triangle. The central portion of the sheet is recessed and cut to form tabs near each of the orifices. The tabs are foldable so that they can be folded over the screw heads when they are in position.
  • the invention aims to overcome the drawbacks of the state of the art and in particular to achieve in a simple manner the integration of a magnetic encoder in an instrumented assembly of rocket cap, outside the rolling bearing connecting the rocket and the moving equipment at the axle box cover.
  • a washer intended to be mounted at the end of a rocket cap of an axle equipped with a bearing, comprising a bottom provided with at least a passage hole of a connecting screw between the rocket cap and the axle flare, characterized in that it further comprises an annular skirt protruding perpendicularly to the bottom for at least partially enveloping the flare cap.
  • This washer allows either to protect an encoder ring mounted directly on the rocket cap, or to support an encoder ring.
  • the fixing hole makes it possible to secure the washer, even in a severe vibratory environment.
  • several fixing holes will preferably be provided. angularly equi-distributed around the axis of the skirt of the washer. The number of holes may in particular be three.
  • the skirt is formed at least partially of a non-magnetic material, which allows to position the encoder ring radially inside the skirt, without disturbing the measurement by a sensor located radially at the outside of the skirt.
  • the bottom is provided with at least one foldable tongue to the passage hole, which allows the possible to lock in rotation the head of a fastening screw through the hole.
  • the washer further comprises a magnetic encoder ring attached to the skirt. The washer then constitutes an armature for this ring.
  • the encoder ring can be attached to a wall of the skirt turned radially inwardly, so that the skirt is a protection of the encoder ring throughout its life, especially during the phases of assembly and disassembly of the rocket cap on the axle stub.
  • the encoder ring may alternatively be fixed to a wall of the skirt turned radially outwardly, the washer then having essentially a mounting frame function allowing, thanks to the hole provided on its bottom, a locking of the rotating encoder ring. It will then be advantageous that the skirt is made of a magnetic material, to promote a mirror effect reinforcing the magnetic field.
  • the encoder ring is fixed by overmolding on the skirt.
  • the skirt comprises a shoulder for centering it vis-à-vis the rocket cap.
  • an instrumented assembly comprising: - a rocket cap having a bottom provided with at least one through hole and a skirt provided with a distal end of support, the rocket cap having a radially outwardly facing face, a washer comprising an annular skirt covering the face of the rocket cap and a bottom provided with a hole aligned with the hole of the rocket cap so as to constitute a passage for a rocket cap fastening screw to the axle stub axle, and a magnetic encoder ring attached to the skirt of the washer.
  • the washer exerts a support function of the encoder ring, and locking the encoder ring, through the hole for receiving a fixing screw. If necessary, more than one hole can be provided.
  • the face of the rocket cap may in particular be cylindrical or frustoconical.
  • the bottom of the washer can be provided with at least one foldable tab on the head of the screw to lock the head of the screw.
  • the washer then acts as a lock washer for the screws fixing the flare cap to the axle stub axle, which offers the advantage of grouping several functions on the same part. If several holes are provided, each hole may advantageously be provided with a tongue.
  • the encoder ring is attached to a wall of the skirt of the washer turned radially inwards, the skirt of the washer being made of a non-magnetic material to not screen the magnetic field. induced by the encoder ring.
  • the encoder ring is preferably either in abutment against the skirt of the rocket cap, or at a distance from the skirt of the rocket cap less than 0.5 mm and preferably less than 0.2 mm, so as to pull part of a mirror effect caused by the rocket cap, which promotes the reading of the magnetic encoder by a sensor placed at a distance of gap.
  • the encoder ring is attached to a wall of the skirt of the washer turned radially outwardly.
  • this cover can be attached to the washer or the rocket cap, or to both.
  • the skirt of the washer may have a shoulder axially located between its proximal end in radial contact with the distal end of the rocket cap and its distal end on the inner wall of which is fixed the encoder ring. This allows the washer to be fitted onto the rocket cap, while preserving a volume between the rocket cap and the washer to house the coder ring.
  • the washer may be a one-piece piece. Alternatively, it may comprise a metal bottom and a non-magnetic skirt forming two parts.
  • the encoder ring is fixed on the outer wall of the skirt of the rocket cap and covered by the skirt of the washer which protects the encoder ring during assembly of this assembly on the rocket. 'axle.
  • the skirt of the washer is non-magnetic, and the skirt of the rocket cap is advantageously magnetic, so as to create a mirror effect reinforcing the magnetic field readable by a sensor located radially outside the encoder.
  • the encoder ring can be fixed on a cup itself attached to the outer wall of the skirt of the rocket cap.
  • the bottom of the washer may comprise a cutout, the assembly further comprising a conductive current collector plate in direct support against the rocket cap through the cutout of the washer.
  • an axle journal at least one inner bearing ring mounted on the axle stub, the distal end of the stub cap being in axial direct or indirect bearing against the inner ring, and - at least one screw of attaching the rocket cap to the axle stub, passing through the hole in the washer and the rocket hat hole.
  • the latter relates to an axle box having a housing, a bearing outer race mounted in the housing and an assembly as described above, the inner ring of the assembly being rotatably mounted in the outer ring via rolling bodies, the encoder ring being located axially between the bearing races and the bottom of the spindle cap, the axle box being further provided with a sensor fixed to the housing and located radially at a gap distance from the encoder ring.
  • the skirt "covers" the encoder ring when there is an axial overlap, that is to say along the axis of rotation of the instrumented assembly, between the skirt and the encoder ring.
  • the invention in its various variants, adapts to all types of bearings; it allows to repair or renovate many existing assemblies by replacing parts, and this in a simple way.
  • Figure 2 a longitudinal section of an instrumented bearing assembly according to a first embodiment of the invention
  • Figure 3 is a perspective view of a lock washer according to a first embodiment of the invention
  • Figure 4 a longitudinal section of the lock washer according to a first embodiment of the invention
  • FIG. 5 a longitudinal section of an instrumented rolling assembly according to a second embodiment of the invention
  • FIG. 6 a longitudinal section of an instrumented rolling assembly according to a third embodiment of the invention
  • Figure 7 a longitudinal section of an instrumented bearing assembly according to a fourth embodiment of the invention
  • Figures 8 to 10 various views of a fifth embodiment of the invention.
  • Figure 2 shows an instrumented bearing assembly for axle and rocket cap. More specifically, on the axle flare 1 is mounted a bearing comprising at least one inner ring 2, rolling bodies 3 and at least one outer ring 4. The elements of the bearing are shown schematically here. In order to isolate and delimit the so-called inner space of the bearing, several deflectors 51, 52 may be provided. According to this example, a first deflector 51 is connected to the fixed outer ring 4 while a second deflector 52 is connected to the rotating parts.
  • a rocket cap 6 is provided, disposed on the end of the axle of the rocket 1.
  • the rocket cap 6 is axially supported on the inner ring 2, the second deflector 52 being axially interposed between these two elements (6 and 2).
  • the fixing of the rocket cap 6 on the rocket 1 is carried out by at least one screw 7, for example hexagonal head 8.
  • the rocket cap 6 comprises a skirt 61 mounted around the rocket 1, and a bottom 62 which cap the end of the rocket 1.
  • the rocket cap 6 is rotatably connected to the axle rocket 1 and the inner ring of the bearing 2 with one or more screws 7.
  • lock washer 9 is provided in particular and in known manner to lock in rotation or the connecting screw 7.
  • the lock washer 9 comprises, as shown in Figure 3, a disc of end 10 forming a bottom provided with orifices 101 for the passage of one or more connecting screws 7 and a central cutout 102 providing tabs 103 foldable on the screw head 8. This provision in itself is known, very close to the embodiment shown in Figure 1.
  • the lock washer 9 further comprises a skirt 11 to be mounted at the end of the rocket cap 6 and more specifically to cover all or part of its outer cylindrical wall.
  • the distal portion 110 of the skirt 11 is intended to be fitted on a portion of the outer wall of the rocket cap, as shown in Figure 2.
  • the skirt 11 advantageously covers axially an annular magnetic sensor or encoder 12, axially disposed near the distal end of the rocket cap 6.
  • the lock washer 9 or at least the skirt 1 1 is here made of a non-magnetic material for example based on copper, aluminum, or some types of stainless steels.
  • This arrangement advantageously protects the magnetic encoder 12 in a simple manner.
  • the magnetic field associated with the encoder 12 can pass through the skirt 11 and be transmitted to a sensor 13 radially disposed opposite the encoder 12.
  • the lock washer 9 or more precisely the skirt 11 of the lock washer 9 can therefore provide here a dual function: the protection of the encoder 12 by the skirt 11 which axially covers the encoder; and the passage of the magnetic field of the encoder 12 towards the sensor 13 which will be located opposite.
  • the encoder 12 is here protected before use, that is to say during the storage of the lock washer 9, but also during the mounting of the lock washer 9 on the rocket cap 6, and naturally during its use.
  • the encoder 12 is perfectly maintained because the lock washer 9 has locking tabs 103 foldable on the head or heads of the assembly screws 7.
  • the lock washer 9 and the encoder 12 are thus perfectly locked in rotation vis-à-vis the rocket cap 6 and the rocket itself 1. This rotational locking function is added to the other functions (already stated) performed by the lock washer according to the invention.
  • the skirt 11 of the lock washer 9 has a proximal cylindrical bearing surface 1 12 of smaller diameter than the distal portion 110 and connected thereto. by a shoulder 111.
  • the encoder 12 may be fixed on an annular support 200 fitted on the outer wall of the rocket cap 6, near its distal end.
  • the encoder 12 is axially covered by the skirt 11, as in the first embodiment. All other characteristics are similar, and the only difference between the two embodiments lies in the connection of the encoder 12 which is here fixed on a portion of the outer wall of the skirt 61 of the rocket cap 6 via the support 200. This solution of course has all the advantages described above in connection with the first embodiment of the invention.
  • the encoder 12 can be fixed on an entire cup 300 located in the volume delimited by the lock washer 9 and the rocket cap 6.
  • the cup itself comprises a skirt cylindrical 301 which carries the encoder 12 and a bottom 302 pinched axially between the bottom 10 of the lock washer and the rocket cap 6.
  • the bottom of the cup 300 is preferably traversed by the fastening screw or screws 7 which provide the mechanical support of the cup 300 and the encoder 12 with a very high reliability in time, even in case of significant vibrations.
  • the skirt 11 and the bottom 10 of the lock washer 9 are in one piece, made in one piece in a non-magnetic material. According to the embodiment of FIG. 7, however, it is possible to provide a skirt 11 which is attached to the bottom 10 of the lock washer 9.
  • the lock washer can then be provided with an indexing relief 11A of the angular position of the skirt cooperating with a housing of the bottom 10.
  • the skirt is also provided with an indexing relief 1 1 B cooperating with a housing 300A of the encoder washer 300 ensuring its angular positioning relative to the skirt 11.
  • the two-part construction offers the advantage of optimizing the choice bottom materials and skirt to adapt to their respective functions.
  • the bottom 10 of the washer is not necessarily of non-magnetic material.
  • the skirt equipped or not with the encoder, is preassembled on the bottom, before mounting the washer on the rocket cap.
  • the skirt can be preassembled on the rocket cap, and the lock washer mounted in a second time.
  • FIG. 8 to 10 are shown different views of another embodiment of an axle box according to the invention. Reference is made to the description of the preceding embodiments for the common elements, which bear identical reference numbers.
  • This embodiment differs from the previous ones by the presence of a specific washer 9, shown in FIG. 9, and by the presence of a current collector 92 for producing a current feedback loop.
  • the lock washer 9, which constitutes a support armature of the encoder 12 is constituted by a cylindrical skirt 1 1 integral with a bottom 10 having one or more lugs 113, provided with through holes 101 for fixing screws 7, the bottom 10 also having at least one opening 114, and in the illustrated embodiment, a number of openings 114 equal to the number of tabs 113, separating them.
  • the encoder 12 is overmolded on the face of the skirt 10 turned radially outwardly.
  • the assembly formed by the lock washer 9 and the encoder 2 is fitted on a cylindrical bearing surface 610 of the rocket cap, located between the axial end of the bottom of the rocket cap 6 and an intermediate shoulder 611.
  • the cylindrical bearing surface 610 is preferably formed in the thickness of the bottom of the rocket cap, so as not to mechanically weaken the skirt 61 and not to disturb if necessary the passage of an electric current between the rotating crew and the casing 400 of the axle box in which is integrated assembly.
  • An annular protective cover 80 consisting of a thin sheet of non-magnetic material is crimped on the rocket cap 6, so as to define with the rocket cap 6 and the lock washer 9 an annular space closed for the encoder ring 12.
  • the positioning and fixing of the support of the encoder 12 are provided by the fastening screws 7, which may if necessary also simultaneously ensure the attachment of the rocket cap 6 to the axle stub 1. This fixation guarantees a good mechanical resistance over time, even in a severe environment subject to strong vibrations.
  • the lock washer 9 is provided with tabs 103 intended to be folded over the heads of the fixing screws to lock the screw heads 8.
  • a current return plate 90 is fixed to the rocket cap 6 by means of a specific screw 91.
  • This screw 91 is located at one of the openings 114 of the lock washer 9, so that the current return plate 90 is in direct contact with the rocket cap 6.
  • the screw 91 does not penetrate directly into the axle stub 1 and does not constitute a screw of fixing the rocket cap 6 to the axle stub axle 1.
  • the washer 9 is a lock washer, that is to say a washer provided with tabs 103 for stopping the screw heads 8

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

Abstract

The invention relates to an instrumented assembly comprising an axle journal (1), an inner race (2) mounted on the axle journal, a journal cap (6) comprising a bottom provided with at least one open hole and a skirt provided with a distal end directly or indirectly axially pressed against the inner race (2), a magnetic encoder ring (12) arranged radially outside the skirt of the journal cap (6) and at least partially covering the skirt of the journal cap, and a locking plate (9) for locking in rotation at least one asssembly screw (7) extending through the hole and attaching the journal cap (6) to the axle journal. According to the invention, the locking plate (9) comprises an at least partially non-magnetic skirt (11) that covers the encoder ring (12) in order to protect same. The invention also relates to a locking plate for forming part of such an assembly, and to an assembly comprising a locking plate and a journal cap.

Description

ASSEMBLAGE INSTRUMENTÉ ET RONDELLE FREIN ASSOCIÉE.  INSTRUMENTAL ASSEMBLY AND BRAKE WASHER.
DOMAINE TECHNIQUE DE L'INVENTION TECHNICAL FIELD OF THE INVENTION
[0001] L'invention se rapporte au domaine des arbres ou essieux à roulements instrumentés. Il s'agit de roulements de grandes dimensions et supportant des charges élevées. L'instrumentation de tels roulements consiste à monter des capteurs de vitesse et/ou de température et/ou de vibrations généralement sur la partie fixe du roulement ; la partie mobile de l'instrumentation est montée sur l'autre bague du roulement. [0002] Plus précisément la présente invention vise un assemblage instrumenté à roulement pour essieu et chapeau de fusée ainsi qu'une rondelle frein pour un tel assemblage.  The invention relates to the field of shafts or axles with instrumented bearings. These bearings are large and support high loads. The instrumentation of such bearings consists in mounting speed and / or temperature and / or vibration sensors generally on the fixed part of the bearing; the mobile part of the instrumentation is mounted on the other ring of the bearing. More specifically, the present invention is an instrumented bearing assembly for axle and rocket cap and a lock washer for such an assembly.
ÉTAT DE LA TECHNIQUE ANTÉRIEURE STATE OF THE PRIOR ART
[0003] Dans la demande de brevet française déposée au nom de la demanderesse sous le numéro national d'enregistrement FR 0806050, on décrit un assemblage instrumenté à roulement pour une fusée d'essieu ferroviaire selon lequel un codeur magnétique annulaire est fixé axialement à l'extérieur du roulement, sur une entretoise elle-même liée à la bague intérieure du roulement montée sur la fusée de l'essieu. Un capteur est lié en rotation à la bague extérieure fixe du roulement, axialement disposé en regard et à distance d'entrefer du codeur magnétique. Un ou plusieurs déflecteurs permettent de protéger l'intérieur du roulement ainsi que le codeur vis-à-vis de la pollution extérieure. Ce déflecteur présente au moins une partie amagnétique au niveau où le capteur et le codeur sont disposés en regard l'un de l'autre. Le déflecteur proposé dans cet art antérieur est complexe et tout à fait spécifique du roulement à instrumenter.  In the French patent application filed in the name of the applicant under the national registration number FR 0806050, there is described an instrumented assembly bearing for a railway axle stub according to which an annular magnetic encoder is fixed axially to the outside the bearing, on a spacer itself linked to the inner ring of the bearing mounted on the axle flare. A sensor is rotatably connected to the fixed outer ring of the bearing, axially arranged opposite and at a distance from the air gap of the magnetic encoder. One or more deflectors protect the inside of the bearing and the encoder vis-à-vis the outdoor pollution. This deflector has at least one non-magnetic portion at the level where the sensor and the encoder are arranged facing one another. The deflector proposed in this prior art is complex and quite specific to the bearing instrumentation.
[0004] Cette solution n'est donc applicable qu'à un nombre limité de roulements. Elle est coûteuse en ce sens que le ou les déflecteurs sont des pièces supplémentaires spécifiques qui s'ajoutent aux pièces existantes (entretoises, codeur, capteur ...) nécessaires au fonctionnement d'une telle instrumentation. [0005] En particulier il arrive que les chocs induits par la manutention notamment lors du stockage et du montage, par des coups de marteau, notamment pour replier les languettes de la tôle frein sur les têtes de vis une fois le chapeau de fusée fixé sur la fusée, endommagent le codeur qui est un élément relativement fragile. This solution is therefore applicable to a limited number of bearings. It is expensive in that the baffle or deflectors are additional specific parts that are added to the existing parts (spacers, encoder, sensor ...) necessary for the operation of such instrumentation. In particular, it happens that the shocks induced by the handling especially during storage and assembly, by hammer blows, in particular to fold the tabs of the brake plate on the screw heads once the rocket cap fixed on the rocket, damage the encoder which is a relatively fragile element.
[0006] On connaît aussi des montages où le codeur est placé à l'intérieur du roulement comme décrit par exemple dans la demande de brevet française déposée au nom de la demanderesse sous le numéro national d'enregistrement FR 0851217 ; dans ce cas, le codeur est en contact direct avec la graisse présente à l'intérieur du roulement ; il est aussi en contact avec les particules et autres éléments de pollution présents à l'intérieur du roulement, de plus en plus nombreuses à mesure du vieillissement du roulement et du codeur lui-même. Also known assemblies where the encoder is placed inside the bearing as described for example in the French patent application filed in the name of the applicant under the national registration number FR 0851217; in this case, the encoder is in direct contact with the grease present inside the bearing; it is also in contact with the particles and other pollution elements present inside the bearing, more and more numerous as the bearing and the encoder itself get older.
[0007] En outre cet assemblage nécessite un déflecteur en plusieurs parties, ce qui est complexe et coûteux. Certaines parties du déflecteur présentent des zones de fragilité mécanique, ce qui pose problème car dans les applications envisagées, des charges mécaniques importantes sont exercées sur les roulements et les pièces associées. In addition this assembly requires a deflector in several parts, which is complex and expensive. Parts of the deflector have areas of mechanical weakness, which is problematic because in the applications envisaged, significant mechanical loads are exerted on the bearings and associated parts.
[0008] Encore une fois un tel assemblage est très spécifique et il n'est pas possible de le monter sur d'autres types de roulements que celui pour lequel il est initialement prévu. En particulier il n'est pas possible de le monter sur des roulements standard. Once again such an assembly is very specific and it is not possible to mount it on other types of bearings than the one for which it is initially planned. In particular it is not possible to mount it on standard bearings.
[0009] On connaît en outre la demande de brevet française FR 2 669 598 qui décrit un essieu de chemin de fer muni d'un détecteur de vitesse intégré c'est à dire placé à l'intérieur du roulement. Le volume intérieur du roulement est axialement délimité par un déflecteur tournant et un déflecteur fixe respectivement liés aux bagues intérieure et extérieure. Par ailleurs le chapeau de fusée (élément d'extrémité) est fixé à la fusée par plusieurs vis qui sont elles-mêmes bloquées en rotation par une rondelle frein, connue en elle même, et qui comporte des languettes repliables sur la tête une fois les vis mises en place et serrées. [0010] La figure 1 illustre une rondelle frein susceptible de faire partie d'un montage de ce type ; elle comprend une tôle de forme extérieure sensiblement triangulaire et pourvue de trois orifices proches de chacun des sommets du triangle. La partie centrale de la tôle est évidée et découpée de façon à former des languettes à proximité de chacun des orifices. Les languettes sont pliables de façon à pouvoir être repliées sur les têtes de vis lorsque celles-ci sont en position. Also known is the French patent application FR 2 669 598 which describes a railway axle provided with an integrated speed sensor that is placed inside the bearing. The internal volume of the bearing is axially defined by a rotating baffle and a fixed baffle respectively related to the inner and outer rings. Furthermore the rocket cap (end element) is fixed to the rocket by several screws which are themselves locked in rotation by a lock washer, known in itself, and which has foldable tongues on the head once the screws set up and tight. [0010] Figure 1 illustrates a lock washer may be part of a mounting of this type; it comprises a sheet of substantially triangular outer shape and provided with three orifices close to each of the vertices of the triangle. The central portion of the sheet is recessed and cut to form tabs near each of the orifices. The tabs are foldable so that they can be folded over the screw heads when they are in position.
[0011] Toutes ces réalisations connues nécessitent un nombre élevé de pièces, de forme plus ou moins complexes. All these known achievements require a high number of parts, more or less complex shapes.
[0012] De plus les codeurs ou détecteurs qui, par nature, sont des pièces sensibles et fragiles, ne sont pas bien protégées notamment avant leur mise en place dans l'assemblage ou après celle-ci. In addition, the encoders or detectors which, by nature, are sensitive and fragile parts, are not well protected including before their introduction in the assembly or after it.
EXPOSÉ DE L'INVENTION STATEMENT OF THE INVENTION
[0013] L'invention vise à remédier aux inconvénients de l'état de la technique et notamment à réaliser de manière simple l'intégration d'un codeur magnétique dans un assemblage instrumenté de chapeau de fusée, à l'extérieur du roulement liant la fusée et l'équipage mobile au carter de boîte d'essieu.  The invention aims to overcome the drawbacks of the state of the art and in particular to achieve in a simple manner the integration of a magnetic encoder in an instrumented assembly of rocket cap, outside the rolling bearing connecting the rocket and the moving equipment at the axle box cover.
[0014] Pour ce faire est proposé selon un premier aspect de l'invention une rondelle destinée à être montée à l'extrémité d'un chapeau de fusée d'un essieu équipé d'un roulement, comprenant un fond pourvu d'au moins un trou de passage d'une vis de liaison entre le chapeau de fusée et la fusée de l'essieu, caractérisée en ce qu'elle comprend en outre une jupe annulaire faisant saillie perpendiculairement au fond pour envelopper au moins partiellement le chapeau de fusée. To do this is proposed according to a first aspect of the invention a washer intended to be mounted at the end of a rocket cap of an axle equipped with a bearing, comprising a bottom provided with at least a passage hole of a connecting screw between the rocket cap and the axle flare, characterized in that it further comprises an annular skirt protruding perpendicularly to the bottom for at least partially enveloping the flare cap.
[0015] Cette rondelle permet soit de protéger un anneau codeur monté directement sur le chapeau de fusée, soit de supporter un anneau codeur. Le trou de fixation permet d'assurer une solidarisation de la rondelle, même dans un environnement vibratoire sévère. En pratique, et pour des raisons d'équilibrage dynamique, on prévoira préférentiellement plusieurs trous de fixation angulairement équi-répartis autour de l'axe de la jupe de la rondelle. Le nombre de trous pourra notamment être de trois. This washer allows either to protect an encoder ring mounted directly on the rocket cap, or to support an encoder ring. The fixing hole makes it possible to secure the washer, even in a severe vibratory environment. In practice, and for dynamic balancing reasons, several fixing holes will preferably be provided. angularly equi-distributed around the axis of the skirt of the washer. The number of holes may in particular be three.
[0016] Selon un mode de réalisation, la jupe est constituée au moins partiellement d'un matériau amagnétique, ce qui permet de positionner l'anneau codeur radialement à l'intérieur de la jupe, sans perturber la mesure par un capteur situé radialement à l'extérieur de la jupe. According to one embodiment, the skirt is formed at least partially of a non-magnetic material, which allows to position the encoder ring radially inside the skirt, without disturbing the measurement by a sensor located radially at the outside of the skirt.
[0017] Selon un mode de réalisation, le fond est pourvu d'au moins une languette repliable vers le trou de passage, ce qui permet le cas échéant de bloquer en rotation la tête d'une vis de fixation traversant le trou. [0018] Selon un mode de réalisation, la rondelle comporte en outre un anneau codeur magnétique fixé à la jupe. La rondelle constitue alors une armature pour cet anneau. According to one embodiment, the bottom is provided with at least one foldable tongue to the passage hole, which allows the possible to lock in rotation the head of a fastening screw through the hole. According to one embodiment, the washer further comprises a magnetic encoder ring attached to the skirt. The washer then constitutes an armature for this ring.
[0019] L'anneau codeur peut être fixé à une paroi de la jupe tournée radialement vers l'intérieur, de sorte que la jupe constitue une protection de l'anneau codeur tout au long de sa vie, notamment pendant les phases de montage et de démontage du chapeau de fusée sur la fusée d'essieu. Avec cette disposition, et si l'on souhaite faire une mesure du champ électromagnétique tournant à partir d'un capteur situé radialement à l'extérieur âe la jupe de protection, il faudra veiller à ce que la jupe soit constituée en un matériau amagnétique, de préférence de faible épaisseur. The encoder ring can be attached to a wall of the skirt turned radially inwardly, so that the skirt is a protection of the encoder ring throughout its life, especially during the phases of assembly and disassembly of the rocket cap on the axle stub. With this arrangement, and if it is desired to make a measurement of the rotating electromagnetic field from a sensor located radially outside the protective skirt, it will be necessary to ensure that the skirt is made of a non-magnetic material, preferably of small thickness.
[0020] L'anneau codeur peut alternativement être fixé à une paroi de la jupe tournée radialement vers l'extérieur, la rondelle ayant alors essentiellement une fonction d'armature de support de montage permettant, grâce au trou prévu sur son fond, un verrouillage de l'anneau codeur en rotation. Il sera alors avantageux que la jupe soit constituée d'un matériau magnétique, pour favoriser un effet miroir renforçant le champ magnétique. The encoder ring may alternatively be fixed to a wall of the skirt turned radially outwardly, the washer then having essentially a mounting frame function allowing, thanks to the hole provided on its bottom, a locking of the rotating encoder ring. It will then be advantageous that the skirt is made of a magnetic material, to promote a mirror effect reinforcing the magnetic field.
[0021] Selon un mode de réalisation, l'anneau codeur est fixé par surmoulage sur la jupe. [0022] Selon un mode de réalisation, la jupe comprend un épaulement permettant de la centrer vis-à-vis du chapeau de fusée. According to one embodiment, the encoder ring is fixed by overmolding on the skirt. According to one embodiment, the skirt comprises a shoulder for centering it vis-à-vis the rocket cap.
[0023] Selon un autre aspect de l'invention, celle-ci a trait à un assemblage instrumenté comprenant : - un chapeau de fusée comportant un fond pourvu d'au moins un trou débouchant et une jupe pourvue d'une extrémité distale d'appui, le chapeau de fusée présentant une face tournée radialement vers l'extérieur, une rondelle comprenant une jupe annulaire recouvrant la face du chapeau de fusée et un fond pourvu d'un trou aligné avec le trou du chapeau de fusée de manière à constituer un passage pour une vis de fixation du chapeau de fusée à la fusée d'essieu, et un anneau codeur magnétique fixé à la jupe de la rondelle. According to another aspect of the invention, it relates to an instrumented assembly comprising: - a rocket cap having a bottom provided with at least one through hole and a skirt provided with a distal end of support, the rocket cap having a radially outwardly facing face, a washer comprising an annular skirt covering the face of the rocket cap and a bottom provided with a hole aligned with the hole of the rocket cap so as to constitute a passage for a rocket cap fastening screw to the axle stub axle, and a magnetic encoder ring attached to the skirt of the washer.
[0024] Dans cet assemblage, la rondelle exerce une fonction d'armature de support de l'anneau codeur, et de verrouillage de l'anneau codeur, par l'intermédiaire du trou destiné à recevoir une vis de fixation. Le cas échéant, plus d'un trou peut être prévu. La face du chapeau de fusée pourra notamment être cylindrique ou tronconique. In this assembly, the washer exerts a support function of the encoder ring, and locking the encoder ring, through the hole for receiving a fixing screw. If necessary, more than one hole can be provided. The face of the rocket cap may in particular be cylindrical or frustoconical.
[0025] Le fond de la rondelle peut être pourvu d'au moins une languette repliable sur la tête de la vis pour bloquer la tête de la vis. La rondelle exerce alors une fonction de rondelle frein pour les vis de fixation du chapeau de fusée à la fusée d'essieu, ce qui offre l'avantage de regrouper plusieurs fonctions sur une même pièce. Si plusieurs trous sont prévus, chaque trou peut avantageusement être pourvu d'une languette. [0026] Selon un mode de réalisation, l'anneau codeur est fixé à une paroi de la jupe de la rondelle tournée radialement vers l'intérieur, la jupe de la rondelle étant constituée en un matériau amagnétique pour ne pas faire écran au champ magnétique induit par l'anneau codeur. [0027] L'anneau codeur est préférentiellement soit en appui contre la jupe du chapeau de fusée, soit à une distance de la jupe du chapeau de fusée inférieure à 0,5 mm et préférentiellement inférieure à 0,2 mm, de manière à tirer partie d'un effet miroir provoqué par le chapeau de fusée, qui favorise la lecture du codeur magnétique par un capteur placé à distance d'entrefer. The bottom of the washer can be provided with at least one foldable tab on the head of the screw to lock the head of the screw. The washer then acts as a lock washer for the screws fixing the flare cap to the axle stub axle, which offers the advantage of grouping several functions on the same part. If several holes are provided, each hole may advantageously be provided with a tongue. According to one embodiment, the encoder ring is attached to a wall of the skirt of the washer turned radially inwards, the skirt of the washer being made of a non-magnetic material to not screen the magnetic field. induced by the encoder ring. The encoder ring is preferably either in abutment against the skirt of the rocket cap, or at a distance from the skirt of the rocket cap less than 0.5 mm and preferably less than 0.2 mm, so as to pull part of a mirror effect caused by the rocket cap, which promotes the reading of the magnetic encoder by a sensor placed at a distance of gap.
[0028] Selon un autre mode de réalisation, l'anneau codeur est fixé à une paroi de la jupe de la rondelle tournée radialement vers l'extérieur. According to another embodiment, the encoder ring is attached to a wall of the skirt of the washer turned radially outwardly.
[0029] Dans ce cas, on peut avantageusement prévoir un capot annulaire de protection amagnétique qui vient recouvrir l'anneau codeur, ce capot pouvant être fixé soit à la rondelle, soit au chapeau de fusée, soit au deux. In this case, it is advantageous to provide a non-magnetic annular protective cover which covers the encoder ring, this cover can be attached to the washer or the rocket cap, or to both.
[0030] La jupe de la rondelle peut présenter un épaulement axialement situé entre son extrémité proximale en contact radial avec l'extrémité distale du chapeau de fusée et son extrémité distale sur la paroi intérieure de laquelle est fixé l'anneau codeur. On peut ainsi emmancher la rondelle sur le chapeau de fusée, tout en préservant un volume entre le chapeau de fusée et la rondelle pour loger l'anneau codeur. The skirt of the washer may have a shoulder axially located between its proximal end in radial contact with the distal end of the rocket cap and its distal end on the inner wall of which is fixed the encoder ring. This allows the washer to be fitted onto the rocket cap, while preserving a volume between the rocket cap and the washer to house the coder ring.
[0031] La rondelle peut être une pièce monobloc. Alternativement, elle peut comporter un fond métallique et une jupe amagnétique formant deux pièces. The washer may be a one-piece piece. Alternatively, it may comprise a metal bottom and a non-magnetic skirt forming two parts.
[0032] Selon un mode de réalisation, l'anneau codeur est fixé sur la paroi extérieure de la jupe du chapeau de fusée et recouvert par la jupe de la rondelle qui protège l'anneau codeur lors du montage de cet assemblage sur la fusée d'essieu. Dans ce cas, la jupe de la rondelle est amagnétique, et la jupe du chapeau de fusée est avantageusement magnétique, de manière à créer un effet de miroir renforçant le champ magnétique lisible par un capteur situé radialement à l'extérieur du codeur. Suivant une variante de réalisation, l'anneau codeur peut être fixé sur une coupelle elle-même fixée sur la paroi extérieure de la jupe du chapeau de fusée. [0033] Le fond de la rondelle peut comporter une découpe, l'assemblage comportant en outre une platine conductrice collectrice de courant en appui direct contre le chapeau de fusée au travers de la découpe de la rondelle. According to one embodiment, the encoder ring is fixed on the outer wall of the skirt of the rocket cap and covered by the skirt of the washer which protects the encoder ring during assembly of this assembly on the rocket. 'axle. In this case, the skirt of the washer is non-magnetic, and the skirt of the rocket cap is advantageously magnetic, so as to create a mirror effect reinforcing the magnetic field readable by a sensor located radially outside the encoder. According to an alternative embodiment, the encoder ring can be fixed on a cup itself attached to the outer wall of the skirt of the rocket cap. The bottom of the washer may comprise a cutout, the assembly further comprising a conductive current collector plate in direct support against the rocket cap through the cutout of the washer.
[0034] Pour constituer un équipage tournant, l'assemblage peut être complété To constitute a rotating crew, the assembly can be completed
I  I
par : une fusée d'essieu, au moins une bague intérieure de roulement montée sur la fusée d'essieu, l'extrémité distale du chapeau de fusée étant en appui axial direct ou indirect contre la bague intérieure, et - au moins une vis de fixation du chapeau de fusée à la fusée d'essieu, traversant le trou de la rondelle et le trou du chapeau de fusée.  by: an axle journal, at least one inner bearing ring mounted on the axle stub, the distal end of the stub cap being in axial direct or indirect bearing against the inner ring, and - at least one screw of attaching the rocket cap to the axle stub, passing through the hole in the washer and the rocket hat hole.
[0035] Selon un autre aspect'de l'invention, celle-ci a trait à une boîte d'essieu comportant un carter, une bague extérieure de roulement logée dans le carter et un assemblage tel que décrit précédemment, la bague intérieure de l'assemblage étant montée rotative dans la bague extérieure par l'intermédiaire de corps roulants, l'anneau codeur étant situé axialement entre les bagues de roulement et le fond du chapeau de fusée, la boîte d'essieu étant en outre pourvue d'un capteur fixé au carter et situé radialement à distance d'entrefer de l'anneau codeur. [0035] According to another aspect 'of the invention, the latter relates to an axle box having a housing, a bearing outer race mounted in the housing and an assembly as described above, the inner ring of the assembly being rotatably mounted in the outer ring via rolling bodies, the encoder ring being located axially between the bearing races and the bottom of the spindle cap, the axle box being further provided with a sensor fixed to the housing and located radially at a gap distance from the encoder ring.
[0036] Dans le cadre de la présente demande, on comprendra que la jupe « recouvre » l'anneau codeur dès lors qu'il existe un recouvrement axial, c'est à dire selon l'axe de rotation de l'assemblage instrumenté, entre la jupe et l'anneau codeur. In the context of the present application, it will be understood that the skirt "covers" the encoder ring when there is an axial overlap, that is to say along the axis of rotation of the instrumented assembly, between the skirt and the encoder ring.
[0037] L'invention, dans ses différentes variantes, s'adapte à tous les types de roulements ; elle permet donc de réparer ou rénover de nombreux assemblages existants par remplacement de pièces, et ceci de façon simple. BRÈVE DESCRIPTION DES FIGURES The invention, in its various variants, adapts to all types of bearings; it allows to repair or renovate many existing assemblies by replacing parts, and this in a simple way. BRIEF DESCRIPTION OF THE FIGURES
[0038] D'autres caractéristiques, détails et avantages de l'invention ressortiront à la lecture de la description qui suit, en référence aux figures annexées, qui illustrent : la figure 1 , déjà commentée, une rondelle frein selon l'état de la technique ;  Other features, details and advantages of the invention will become apparent on reading the description which follows, with reference to the accompanying figures, which illustrate: Figure 1, already commented, a lock washer according to the state of the technical;
la figure 2, une coupe longitudinale d'un assemblage instrumenté à roulement selon un premier mode de réalisation de l'invention ; la figure 3, une vue en perspective d'une rondelle frein selon un premier mode de réalisation de l'invention ;  Figure 2, a longitudinal section of an instrumented bearing assembly according to a first embodiment of the invention; Figure 3 is a perspective view of a lock washer according to a first embodiment of the invention;
la figure 4 une coupe longitudinale de la rondelle frein selon un premier mode de réalisation de l'invention ;  Figure 4 a longitudinal section of the lock washer according to a first embodiment of the invention;
la figure 5, une coupe longitudinale d'un assemblage instrumenté à roulement selon un deuxième mode de réalisation de l'invention, la figure 6, une coupe longitudinale d'un assemblage instrumenté à roulement selon un troisième mode de réalisation de l'invention, et la figure 7, une coupe longitudinale d'un assemblage instrumenté à roulement selon un quatrième mode de réalisation de l'invention ; les figures 8 à 10 diverses vue d'un cinquième mode de réalisation de l'invention.  FIG. 5, a longitudinal section of an instrumented rolling assembly according to a second embodiment of the invention, FIG. 6, a longitudinal section of an instrumented rolling assembly according to a third embodiment of the invention, and Figure 7, a longitudinal section of an instrumented bearing assembly according to a fourth embodiment of the invention; Figures 8 to 10 various views of a fifth embodiment of the invention.
[0039] Pour plus de clarté, les éléments identiques ou similaires sont repérés par des signes de référence identiques sur l'ensemble des figures.  For clarity, identical or similar elements are identified by identical reference signs throughout the figures.
DESCRIPTION DETAILLEE D'UN MODE DE RÉALISATION DETAILED DESCRIPTION OF AN EMBODIMENT
[0040] La figure 2 montre un assemblage instrumenté à roulement pour essieu et chapeau de fusée. Plus précisément, sur la fusée de l'essieu 1 est monté un roulement comprenant au moins une bague intérieure 2, des corps roulants 3 et au moins une bague extérieure 4. Les éléments du roulement sont ici représentés de façon schématique. Afin d'isoler et de délimiter l'espace dit intérieur du roulement, plusieurs déflecteurs 51 , 52 peuvent être prévus. Selon cet exemple, un premier déflecteur 51 est lié à la bague extérieure fixe 4 tandis qu'un deuxième déflecteur 52 est lié aux pièces tournantes. [0040] Figure 2 shows an instrumented bearing assembly for axle and rocket cap. More specifically, on the axle flare 1 is mounted a bearing comprising at least one inner ring 2, rolling bodies 3 and at least one outer ring 4. The elements of the bearing are shown schematically here. In order to isolate and delimit the so-called inner space of the bearing, several deflectors 51, 52 may be provided. According to this example, a first deflector 51 is connected to the fixed outer ring 4 while a second deflector 52 is connected to the rotating parts.
[0041] Un chapeau de fusée 6 est prévu, disposé sur l'extrémité de la fusée de l'essieu 1. Le chapeau de fusée 6 est en appui axial sur la bague intérieure 2, le deuxième déflecteur 52 étant axialement intercalé entre ces deux éléments (6 et 2). De façon classique, la fixation du chapeau de fusée 6 sur la fusée 1 est réalisée par au moins une vis 7 par exemple à tête hexagonale 8. A rocket cap 6 is provided, disposed on the end of the axle of the rocket 1. The rocket cap 6 is axially supported on the inner ring 2, the second deflector 52 being axially interposed between these two elements (6 and 2). In conventional manner, the fixing of the rocket cap 6 on the rocket 1 is carried out by at least one screw 7, for example hexagonal head 8.
[0042] Le chapeau de fusée 6 comprend une jupe 61 montée autour de la fusée 1 , et un fond 62 qui coiffe l'extrémité de la fusée 1. Le chapeau de fusée 6 est donc lié en rotation à la fusée de l'essieu 1 et à la bague intérieure du roulement 2 grâce à une ou plusieurs vis 7. The rocket cap 6 comprises a skirt 61 mounted around the rocket 1, and a bottom 62 which cap the end of the rocket 1. The rocket cap 6 is rotatably connected to the axle rocket 1 and the inner ring of the bearing 2 with one or more screws 7.
[0043] De façon intéressante une rondelle frein 9 est prévue afin notamment et de façon connue de bloquer en rotation la ou les vis de liaison 7. Pour réaliser cette fonction la rondelle frein 9 comprend, comme visible sur la figure 3, un disque d'extrémité 10 formant un fond muni d'orifices 101 pour le passage de une ou plusieurs vis de liaison 7 et d'une découpe centrale 102 prévoyant des languettes 103 repliables sur la ou les têtes de vis 8. Cette disposition en elle- même est connue, très proche de la réalisation montrée sur la figure 1. Interestingly a lock washer 9 is provided in particular and in known manner to lock in rotation or the connecting screw 7. To achieve this function the lock washer 9 comprises, as shown in Figure 3, a disc of end 10 forming a bottom provided with orifices 101 for the passage of one or more connecting screws 7 and a central cutout 102 providing tabs 103 foldable on the screw head 8. This provision in itself is known, very close to the embodiment shown in Figure 1.
[0044] Conformément à l'invention la rondelle frein 9 comprend en outre une jupe 11 destinée à être montée à l'extrémité du chapeau de fusée 6 et plus précisément à recouvrir tout ou partie de sa paroi cylindrique extérieure. En tout état de cause selon ce mode de réalisation de l'invention, la partie distale 110 de la jupe 11 est destinée à être emmanchée sur une partie de la paroi extérieure du chapeau de fusée, comme visible sur la figure 2. [0045] La jupe 11 permet avantageusement de recouvrir axialement un capteur ou codeur magnétique 12 annulaire, axialement disposé à proximité de l'extrémité distale du chapeau de fusée 6. [0046] La rondelle frein 9 ou tout au moins la jupe 1 1 est ici constituée d'un matériau amagnétique par exemple à base de cuivre, d'aluminium, ou encore certains types d'aciers inoxydables. According to the invention the lock washer 9 further comprises a skirt 11 to be mounted at the end of the rocket cap 6 and more specifically to cover all or part of its outer cylindrical wall. In any case according to this embodiment of the invention, the distal portion 110 of the skirt 11 is intended to be fitted on a portion of the outer wall of the rocket cap, as shown in Figure 2. [0045] The skirt 11 advantageously covers axially an annular magnetic sensor or encoder 12, axially disposed near the distal end of the rocket cap 6. The lock washer 9 or at least the skirt 1 1 is here made of a non-magnetic material for example based on copper, aluminum, or some types of stainless steels.
[0047] Cette disposition permet avantageusement de protéger le codeur magnétique 12, et ce d'une façon simple. This arrangement advantageously protects the magnetic encoder 12 in a simple manner.
[0048] Selon le mode de réalisation illustré sur les figures 2 à 4, sur la paroi interne de la jupe 11 est fixé par exemple par surmoulage un anneau magnétique utilisable comme codeur magnétique 12. En effet la jupe 11 étant au moins partiellement constituée d'un matériau amagnétique, le champ magnétique associé au codeur 12 pourra passer à travers la jupe 11 et être transmis à un capteur 13 radialement disposé en face du codeur 12. According to the embodiment illustrated in Figures 2 to 4, on the inner wall of the skirt 11 is fixed for example by overmolding a magnetic ring used as magnetic encoder 12. Indeed the skirt 11 being at least partially constituted of a non-magnetic material, the magnetic field associated with the encoder 12 can pass through the skirt 11 and be transmitted to a sensor 13 radially disposed opposite the encoder 12.
[0049] La rondelle frein 9 ou plus précisément la jupe 11 de la rondelle frein 9 peut donc assurer ici une double fonction : la protection du codeur 12 par la jupe 11 qui recouvre axialement le codeur ; et le passage du champ magnétique du codeur 12 vers le capteur 13 qui sera situé en regard. The lock washer 9 or more precisely the skirt 11 of the lock washer 9 can therefore provide here a dual function: the protection of the encoder 12 by the skirt 11 which axially covers the encoder; and the passage of the magnetic field of the encoder 12 towards the sensor 13 which will be located opposite.
[0050] Le codeur 12 est ici protégé avant son utilisation c'est à dire pendant le stockage de la rondelle frein 9, mais également pendant le montage de la rondelle frein 9 sur le chapeau de fusée 6, et naturellement pendant son utilisation. The encoder 12 is here protected before use, that is to say during the storage of the lock washer 9, but also during the mounting of the lock washer 9 on the rocket cap 6, and naturally during its use.
[0051] En outre, le codeur 12 est parfaitement maintenu car la rondelle frein 9 présente des languettes de blocage 103 repliables sur la ou les têtes des vis 7 d'assemblage. Ainsi lorsque les vis 7 sont vissées entre la fusée 1 et le chapeau de fusée 6, les languettes 103 sont repliées sur les têtes 8 qui se trouvent bloquées en rotation. La rondelle frein 9 ainsi que le codeur 12 sont ainsi parfaitement bloqués en rotation vis-à-vis du chapeau de fusée 6 et de la fusée elle-même 1. Cette fonction de blocage en rotation s'ajoute aux autres fonctions (déjà énoncées) réalisées par la rondelle frein selon l'invention. In addition, the encoder 12 is perfectly maintained because the lock washer 9 has locking tabs 103 foldable on the head or heads of the assembly screws 7. Thus when the screws 7 are screwed between the rocket 1 and the rocket cap 6, the tongues 103 are folded over the heads 8 which are locked in rotation. The lock washer 9 and the encoder 12 are thus perfectly locked in rotation vis-à-vis the rocket cap 6 and the rocket itself 1. This rotational locking function is added to the other functions (already stated) performed by the lock washer according to the invention.
[0052] La jupe 11 de la rondelle frein 9 présente une portée cylindrique proximale 1 12 de plus faible diamètre que la partie distale 110 et reliée à celle-ci par un épaulement 111. L'écart entre les diamètres des sections considérées correspond sensiblement à l'épaisseur du logement du codeur 12, comme parfaitement visible sur la figure 4 ; un faible jeu radial est prévu entre ces éléments, de sorte que la masse métallique du chapeau de fusée favorise un effet miroir renforçant le champ magnétique lu par le capteur. Pour assembler la rondelle et le chapeau de fusée avant le montage de ce dernier sur la fusée, on peut prévoir un emmanchement en force de la rondelle frein 9 sur le chapeau de fusée, soit au niveau de la portée proximale 112 de petit diamètre soit au niveau de la partie distale 110 de plus grand diamètre. The skirt 11 of the lock washer 9 has a proximal cylindrical bearing surface 1 12 of smaller diameter than the distal portion 110 and connected thereto. by a shoulder 111. The difference between the diameters of the sections considered substantially corresponds to the thickness of the housing of the encoder 12, as clearly visible in Figure 4; a small radial clearance is provided between these elements, so that the metal mass of the rocket cap promotes a mirror effect reinforcing the magnetic field read by the sensor. To assemble the washer and the rocket cap before mounting the latter on the rocket, one can provide a force fitting of the lock washer 9 on the rocket cap, either at the small diameter proximal bearing surface 112 or at the level of the distal portion 110 of larger diameter.
[0053] Selon un autre mode de réalisation de l'invention tel que représenté sur la figure 5, le codeur 12 peut être fixé sur un support annulaire 200 emmanché sur la paroi extérieure du chapeau de fusée 6, à proximité de son extrémité distale. Bien entendu le codeur 12 est axialement recouvert par la jupe 11 , comme dans le premier mode de réalisation. Toutes les autres caractéristiques sont semblables, et la seule différence entre les deux modes de réalisation réside dans la liaison du codeur 12 qui est ici fixé sur une partie de la paroi extérieure de la jupe 61 du chapeau de fusée 6 par l'intermédiaire du support 200. Cette solution présente bien entendu tous les avantages décrits précédemment en relation avec le premier mode de réalisation de l'invention. According to another embodiment of the invention as shown in Figure 5, the encoder 12 may be fixed on an annular support 200 fitted on the outer wall of the rocket cap 6, near its distal end. Of course the encoder 12 is axially covered by the skirt 11, as in the first embodiment. All other characteristics are similar, and the only difference between the two embodiments lies in the connection of the encoder 12 which is here fixed on a portion of the outer wall of the skirt 61 of the rocket cap 6 via the support 200. This solution of course has all the advantages described above in connection with the first embodiment of the invention.
[0054] Suivant le mode de réalisation de la figure 6, le codeur 12 peut être fixé sur une coupelle 300 tout entière située dans le volume délimité par la rondelle frein 9 et le chapeau de fusée 6. La coupelle comporte elle-même une jupe cylindrique 301 qui porte le codeur 12 et un fond 302 pincé axialement entre le fond 10 de la rondelle frein et le chapeau de fusée 6. Le fond de la coupelle 300 est avantageusement traversé par la ou les vis de fixation 7 qui assurent le maintien mécanique de la coupelle 300 et du codeur 12 avec une très grande fiabilité dans le temps, même en cas de vibrations importantes. According to the embodiment of FIG. 6, the encoder 12 can be fixed on an entire cup 300 located in the volume delimited by the lock washer 9 and the rocket cap 6. The cup itself comprises a skirt cylindrical 301 which carries the encoder 12 and a bottom 302 pinched axially between the bottom 10 of the lock washer and the rocket cap 6. The bottom of the cup 300 is preferably traversed by the fastening screw or screws 7 which provide the mechanical support of the cup 300 and the encoder 12 with a very high reliability in time, even in case of significant vibrations.
[0055] Dans les modes de réalisation précédents, la jupe 11 et le fond 10 de la rondelle frein 9 sont d'un seul tenant, réalisés d'une pièce dans un matériau amagnétique. Suivant le mode de réalisation de la figure 7, il est toutefois envisageable de prévoir une jupe 11 qui soit rapportée sur le fond 10 de la rondelle frein 9. La rondelle frein peut alors être pourvue d'un relief d'indexation 11A de la position angulaire de la jupe coopérant avec un logement du fond 10. La jupe est aussi pourvue d'un relief d'indexation 1 1 B coopérant avec un logement 300A de la rondelle porte codeur 300 assurant son positionnement angulaire par rapport à la jupe 11. La construction en deux parties offre l'avantage d'optimiser le choix des matériaux du fond et de la jupe pour les adapter à leurs fonctions respectives. Dans cette hypothèse, notamment, le fond 10 de la rondelle n'est pas nécessairement en matériau amagnétique. In the previous embodiments, the skirt 11 and the bottom 10 of the lock washer 9 are in one piece, made in one piece in a non-magnetic material. According to the embodiment of FIG. 7, however, it is possible to provide a skirt 11 which is attached to the bottom 10 of the lock washer 9. The lock washer can then be provided with an indexing relief 11A of the angular position of the skirt cooperating with a housing of the bottom 10. The skirt is also provided with an indexing relief 1 1 B cooperating with a housing 300A of the encoder washer 300 ensuring its angular positioning relative to the skirt 11. The two-part construction offers the advantage of optimizing the choice bottom materials and skirt to adapt to their respective functions. In this case, in particular, the bottom 10 of the washer is not necessarily of non-magnetic material.
[0056] Selon une variante, la jupe, équipée ou non du codeur, est préassemblée sur le fond, avant montage de la rondelle sur le chapeau de fusée. Alternativement, la jupe peut être préassemblée sur le chapeau de fusée, et la rondelle frein montée dans un deuxième temps. According to a variant, the skirt, equipped or not with the encoder, is preassembled on the bottom, before mounting the washer on the rocket cap. Alternatively, the skirt can be preassembled on the rocket cap, and the lock washer mounted in a second time.
[0057] Sur les figures 8 à 10 sont représentées différentes vues d'un autre mode de réalisation d'une boîte d'essieu selon l'invention. On se référera au descriptif des modes de réalisation précédents pour les éléments communs, qui portent des numéros de référence identiques. Ce mode de réalisation se distingue des précédents par la présence d'une rondelle frein 9 spécifique, représentée sur la figure 9, et par la présence d'un collecteur de courant 92 pour réaliser une boucle de retour de courant. Le rondelle frein 9, qui constitue une armature de support du codeur 12, est constituée par une jupe cylindrique 1 1 solidaire d'un fond 10 présentant une ou plusieurs pattes 113, pourvues de trous de passage 101 pour des vis de fixation 7, le fond 10 présentant également au moins une ouverture 114, et dans l'exemple de réalisation illustré, un nombre d'ouvertures 114 égal au nombre de pattes 113, séparant ces dernières. In Figures 8 to 10 are shown different views of another embodiment of an axle box according to the invention. Reference is made to the description of the preceding embodiments for the common elements, which bear identical reference numbers. This embodiment differs from the previous ones by the presence of a specific washer 9, shown in FIG. 9, and by the presence of a current collector 92 for producing a current feedback loop. The lock washer 9, which constitutes a support armature of the encoder 12, is constituted by a cylindrical skirt 1 1 integral with a bottom 10 having one or more lugs 113, provided with through holes 101 for fixing screws 7, the bottom 10 also having at least one opening 114, and in the illustrated embodiment, a number of openings 114 equal to the number of tabs 113, separating them.
[0058] Le codeur 12 est surmoulé sur la face de la jupe 10 tournée radialement vers l'extérieur. L'ensemble constitué par la rondelle frein 9 et le codeur 2 est emmanché sur une portée cylindrique 610 du chapeau de fusée, située entre l'extrémité axiale du fond du chapeau de fusée 6 et un épaulement intermédiaire 611. La portée cylindrique 610 est préférablement constituée dans l'épaisseur du fond du chapeau de fusée, de manière à ne pas affaiblir mécaniquement la jupe 61 et à ne pas perturber le cas échéant le passage d'un courant électrique entre l'équipage tournant et le carter 400 de la boîte d'essieu dans laquelle est intégré l'assemblage. [0059] Un capot annulaire de protection 80 constitué par une fine tôle en matériau amagnétique est serti sur le chapeau de fusée 6, de façon à définir avec le chapeau de fusée 6 et la rondelle frein 9 un espace annulaire clos pour l'anneau codeur 12. The encoder 12 is overmolded on the face of the skirt 10 turned radially outwardly. The assembly formed by the lock washer 9 and the encoder 2 is fitted on a cylindrical bearing surface 610 of the rocket cap, located between the axial end of the bottom of the rocket cap 6 and an intermediate shoulder 611. The cylindrical bearing surface 610 is preferably formed in the thickness of the bottom of the rocket cap, so as not to mechanically weaken the skirt 61 and not to disturb if necessary the passage of an electric current between the rotating crew and the casing 400 of the axle box in which is integrated assembly. An annular protective cover 80 consisting of a thin sheet of non-magnetic material is crimped on the rocket cap 6, so as to define with the rocket cap 6 and the lock washer 9 an annular space closed for the encoder ring 12.
[0060] Le positionnement et la fixation du support du codeur 12 sont assurés par les vis de fixation 7, qui peuvent le cas échéant également assurer simultanément la fixation du chapeau de fusée 6 à la fusée d'essieu 1. Cette fixation garantit une bonne tenue mécanique dans le temps, même dans un environnement sévère soumis à de fortes vibrations. La rondelle frein 9 est pourvue de languettes 103 destinées à se rabattre sur les têtes des vis de fixation pour verrouiller les têtes de vis 8. The positioning and fixing of the support of the encoder 12 are provided by the fastening screws 7, which may if necessary also simultaneously ensure the attachment of the rocket cap 6 to the axle stub 1. This fixation guarantees a good mechanical resistance over time, even in a severe environment subject to strong vibrations. The lock washer 9 is provided with tabs 103 intended to be folded over the heads of the fixing screws to lock the screw heads 8.
[0061] Par ailleurs, une plaque 90 de retour de courant est fixée au chapeau de fusée 6 par l'intermédiaire d'une vis spécifique 91. Cette vis 91 est située au niveau d'une des ouvertures 114 de la rondelle frein 9, de sorte que la plaque de retour de courant 90 se trouve en contact direct avec le chapeau de fusée 6. Dans l'exemple de réalisation, la vis 91 ne pénètre pas directement dans la fusée d'essieu 1 et ne constitue pas une vis de fixation du chapeau de fusée 6 à la fusée d'essieu 1. Toutefois, dans une variante non représentée, il est envisageable d'utiliser l'une des vis de fixation 7 du chapeau de fusée 6 à la fusée d'essieu 1 pour également fixer la plaque 90. Le balai 93 du collecteur de courant 92, solidaire du couvercle 410 du carter de la boîte d'essieu, vient en contact frottant sur la plaque 90, qui fait partie de l'équipage tournant solidaire de l'essieu, pour constituer un chemin électrique pour le courant électrique circulant entre les rails et les équipements électriques du véhicule. [0062] Il est à noter que dans l'ensemble des modes de réalisation illustrés par les figures, la rondelle 9 est une rondelle frein, c'est-à-dire une rondelle pourvue de languettes 103 d'arrêt des têtes de vis 8. Toutefois, il est possible, sans sortir du cadre de l'invention, de prévoir des rondelles n'ayant pas de languette 103 et n'ayant pas de fonction de verrouillage des vis 8. Furthermore, a current return plate 90 is fixed to the rocket cap 6 by means of a specific screw 91. This screw 91 is located at one of the openings 114 of the lock washer 9, so that the current return plate 90 is in direct contact with the rocket cap 6. In the exemplary embodiment, the screw 91 does not penetrate directly into the axle stub 1 and does not constitute a screw of fixing the rocket cap 6 to the axle stub axle 1. However, in a variant not shown, it is conceivable to use one of the fastening screws 7 of the rocket cap 6 to the axle stub 1 also for fix the plate 90. The brush 93 of the current collector 92, integral with the cover 410 of the casing of the axle box, comes into rubbing contact on the plate 90, which is part of the rotating assembly integral with the axle, to constitute an electrical path for the electric current flowing between the rails and the electrical equipment of the vehicle. It should be noted that in all the embodiments illustrated in the figures, the washer 9 is a lock washer, that is to say a washer provided with tabs 103 for stopping the screw heads 8 However, it is possible, without departing from the scope of the invention, to provide washers having no tongue 103 and having no function of locking screws 8.

Claims

REVENDICATIONS
1. Rondelle destinée à être montée à l'extrémité d'un chapeau de fusée (6) d'un essieu équipé d'un roulement, comprenant un fond (10) pourvu d'au moins un trou (101 ) de passage d'une vis de liaison (7) entre le chapeau de fusée (6) et la fusée de l'essieu (1), caractérisée en ce qu'elle comprend en outre une jupe annulaire (11 ) faisant saillie perpendiculairement au fond pour envelopper au moins partiellement le chapeau de fusée. 1. Washer intended to be mounted at the end of a spindle cap (6) of an axle equipped with a bearing, comprising a bottom (10) provided with at least one hole (101) for the passage of a connecting screw (7) between the rocket cap (6) and the axle flare (1), characterized in that it further comprises an annular skirt (11) projecting perpendicularly to the bottom to envelop at least partially rocket hat.
2. Rondelle selon la revendication 1 , caractérisée en ce que le fond est pourvu d'au moins une languette repliable vers le trou de passage (101). 2. Washer according to claim 1, characterized in that the bottom is provided with at least one foldable tab towards the through hole (101).
3. Rondelle selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comporte en outre un anneau codeur magnétique fixé à la jupe. 3. Washer according to any one of the preceding claims, characterized in that it further comprises a magnetic encoder ring attached to the skirt.
4. Rondelle selon la revendication 3, caractérisée en ce que l'anneau codeur (12) est fixé à une paroi de la jupe (11) tournée radialement vers l'intérieur. 4. Washer according to claim 3, characterized in that the encoder ring (12) is fixed to a wall of the skirt (11) rotated radially inwards.
5. Rondelle selon la revendication 4, caractérisée en ce que la jupe est constituée au moins partiellement d'un matériau amagnétique. 5. Washer according to claim 4, characterized in that the skirt is formed at least partially of a non-magnetic material.
6. Rondelle selon la revendication 3, caractérisée en ce que l'anneau codeur (12) est fixé à une paroi de la jupe (11 ) tournée radialement vers l'extérieur. 6. Washer according to claim 3, characterized in that the encoder ring (12) is fixed to a wall of the skirt (11) rotated radially outwards.
7. Rondelle selon la revendication 6, caractérisée en ce que la jupe est constituée au moins partiellement d'un matériau magnétique. 7. Washer according to claim 6, characterized in that the skirt is formed at least partially of a magnetic material.
8. Rondelle selon l'une quelconque des revendications 3 à 7, caractérisée en ce que l'anneau codeur (12) est fixé par surmoulage sur la jupe ( ). 8. Washer according to any one of claims 3 to 7, characterized in that the encoder ring (12) is fixed by overmolding on the skirt ().
9. Rondelle selon l'une quelconque des revendications précédentes, caractérisée en ce que la jupe (11) comprend un épaulement (111 ) permettant de la centrer vis-à-vis du chapeau de fusée (6). 9. Washer according to any one of the preceding claims, characterized in that the skirt (11) comprises a shoulder (111) for centering it vis-à-vis the rocket cap (6).
10. Assemblage instrumenté comprenant : An instrumented assembly comprising:
- un chapeau de fusée (6) comportant un fond (62) pourvu d'au moins un trou débouchant et une jupe (61 ) pourvue d'une extrémité distale d'appui, le chapeau de fusée présentant une face tournée radialement vers l'extérieur, caractérisé en ce qu'il comporte en outre - a rocket cap (6) having a bottom (62) provided with at least one through hole and a skirt (61) provided with a distal support end, the rocket cap having a face turned radially towards the exterior, characterized in that it further comprises
- une rondelle (9) comprenant une jupe annulaire (11) recouvrant la face du chapeau de fusée et un fond pourvu d'au moins un trou aligné avec le ou l'un des trous du chapeau de fusée de manière à constituer un passage pour une vis de fixation du chapeau de fusée à la fusée d'essieu, et a washer (9) comprising an annular skirt (11) covering the face of the rocket cap and a bottom provided with at least one hole aligned with the one or one of the holes of the rocket cap so as to constitute a passage for a screw fixing the rocket cap to the axle stub axle, and
- un anneau codeur magnétique (12) fixé à la jupe de la rondelle. - A magnetic encoder ring (12) attached to the skirt of the washer.
11. Assemblage selon la revendication 10, caractérisé en ce que le fond de la rondelle est pourvu d'au moins une languette repliable sur la tête de la vis pour bloquer la tête de la vis. 11. Assembly according to claim 10, characterized in that the bottom of the washer is provided with at least one foldable tab on the head of the screw to lock the head of the screw.
12. Assemblage selon l'une quelconque des revendications 10 ou 11 , caractérisé en ce que l'anneau codeur est fixé à une paroi de la jupe (11) de la rondelle tournée radialement vers l'intérieur, la jupe (11) de la rondelle étant constituée en un matériau amagnétique. 12. Assembly according to any one of claims 10 or 11, characterized in that the encoder ring is attached to a wall of the skirt (11) of the washer turned radially inwardly, the skirt (11) of the washer being made of a non-magnetic material.
13. Assemblage selon la revendication 12, caractérisé en ce que l'anneau codeur (12) est soit en appui direct ou indirect contre la jupe (61) du chapeau de fusée, soit à une distance de la jupe (61) du chapeau de fusée inférieure à 0,5 mm et préférentiellement inférieure à 0,2 mm. 13. Assembly according to claim 12, characterized in that the encoder ring (12) is either in direct or indirect support against the skirt (61) of the rocket cap, or at a distance from the skirt (61) of the cap. rocket less than 0.5 mm and preferably less than 0.2 mm.
14. Assemblage selon l'une quelconque des revendications 12 ou 13, caractérisé en ce que la jupe (11 ) de la rondelle (9) comprend un épaulement (111) axialement situé entre son extrémité proximale en contact radial avec l'extrémité distale du chapeau de fusée (6) et son extrémité distale sur la paroi intérieure de laquelle est fixé l'anneau codeur (12). 14. Assembly according to any one of claims 12 or 13, characterized in that the skirt (11) of the washer (9) comprises a shoulder (111) axially located between its proximal end in radial contact with the distal end of the rocket cap (6) and its distal end on the inner wall of which is fixed the encoder ring (12).
15. Assemblage selon l'une quelconque des revendications 10 ou 11 , caractérisé en ce que l'anneau codeur (12) est fixé sur la paroi extérieure de la jupe (61 ) du chapeau de fusée (6) et recouvert par la jupe (11) de la rondelle, la jupe (11 ) de la rondelle étant constituée en un matériau amagnétique. 15. Assembly according to any one of claims 10 or 11, characterized in that the encoder ring (12) is fixed on the outer wall of the skirt (61) of the flare cap (6) and covered by the skirt ( 11) of the washer, the skirt (11) of the washer being made of a non-magnetic material.
16. Assemblage selon la revendication 15, caractérisé en ce que l'anneau codeur est fixé sur une coupelle fixée sur la paroi extérieure de la jupe (61) du chapeau de fusée (6). 16. Assembly according to claim 15, characterized in that the encoder ring is fixed on a cup attached to the outer wall of the skirt (61) of the rocket cap (6).
17. Assemblage selon l'une quelconque des revendications 10 à 16, caractérisé en ce que le fond de la rondelle comporte une découpe, l'assemblage comportant en outre une platine conductrice collectrice de courant en appui direct contre le chapeau de fusée au travers de la découpe de la rondelle. 17. An assembly according to any one of claims 10 to 16, characterized in that the bottom of the washer comprises a cutout, the assembly further comprising a current collecting conductive plate in direct abutment against the rocket cap through the cutting of the washer.
18. Assemblage selon l'une quelconque des revendications 10 à 17, caractérisé en ce que la rondelle (9) comporte un fond métallique (10) et une jupe amagnétique (11) formant deux pièces. 18. Assembly according to any one of claims 10 to 17, characterized in that the washer (9) comprises a metal base (10) and a non-magnetic skirt (11) forming two parts.
19. Assemblage selon la revendication 10 ou la revendication 11 , caractérisé en ce que l'anneau codeur est fixé à une paroi de la jupe (11) de la rondelle tournée radialement vers l'extérieur. 19. An assembly according to claim 10 or claim 11, characterized in that the encoder ring is attached to a wall of the skirt (11) of the washer turned radially outwards.
20. Assemblage selon l'une quelconque des revendications 10 à 17, ou 19, caractérisé en ce que la rondelle (9) est une pièce monobloc. 20. Assembly according to any one of claims 10 to 17, or 19, characterized in that the washer (9) is a single piece.
21. Assemblage selon l'une quelconque des 10 à 20, caractérisé en ce qu'il comporte en outre : 21. Assembly according to any one of 10 to 20, characterized in that it further comprises:
- une fusée d'essieu (1 ), - an axle stub (1),
- au moins une bague intérieure (2) de roulement montée sur la fusée d'essieu, l'extrémité distale du chapeau de fusée étant en appui axial direct ou indirect contre la bague intérieure, et - au moins une vis de fixation du chapeau de fusée à la fusée d'essieu, traversant le trou de la rondelle et le trou du chapeau de fusée. at least one inner race (2) mounted on the axle stub, the distal end of the stub cap being in direct or indirect axial abutment against the inner race, and - at least one screw fixing the rocket cap to the axle stub, passing through the hole of the washer and the hole of the rocket cap.
22. Boîte d'essieu comportant un carter, une bague extérieure de roulement logée dans le carter et un ' assemblage selon l'une quelconque des revendications 10 à 21 , la bague intérieure de l'assemblage étant montée rotative dans la bague extérieure par l'intermédiaire de corps roulants, l'anneau codeur étant situé axialement entre les bagues de roulement et le fond du chapeau de fusée, la boîte étant en outre pourvue d'un capteur fixé au carter et situé radialement à distance d'entrefer de l'anneau codeur. 22. Axle box comprising a housing, an outer bearing ring housed in the housing and an assembly according to any one of claims 10 to 21, the inner ring of the assembly being rotatably mounted in the outer ring by the intermediate of rolling bodies, the encoder ring being located axially between the bearing rings and the bottom of the rocket cap, the box being further provided with a sensor attached to the casing and located radially at a distance from the air gap of the encoder ring.
EP11730718A 2010-04-30 2011-03-31 Instrumented assembly and associated locking plate Withdrawn EP2564209A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1001872A FR2959539B1 (en) 2010-04-30 2010-04-30 INSTRUMENT ASSEMBLY AND BRAKE WASHER THEREFOR
PCT/FR2011/000195 WO2011135199A1 (en) 2010-04-30 2011-03-31 Instrumented assembly and associated locking plate

Publications (1)

Publication Number Publication Date
EP2564209A1 true EP2564209A1 (en) 2013-03-06

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EP11730718A Withdrawn EP2564209A1 (en) 2010-04-30 2011-03-31 Instrumented assembly and associated locking plate

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EP (1) EP2564209A1 (en)
KR (1) KR20130061146A (en)
CN (1) CN102893162B (en)
FR (1) FR2959539B1 (en)
RU (1) RU2012151267A (en)
WO (1) WO2011135199A1 (en)

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JP6803149B2 (en) * 2016-04-27 2020-12-23 川崎重工業株式会社 Bearing temperature detector for railroad bogies
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RU2012151267A (en) 2014-06-10
FR2959539A1 (en) 2011-11-04
KR20130061146A (en) 2013-06-10
WO2011135199A1 (en) 2011-11-03
CN102893162B (en) 2015-04-01
FR2959539B1 (en) 2012-07-13
CN102893162A (en) 2013-01-23

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