EP3707806A1 - Rolling-bearing plate for a rotary electric machine - Google Patents

Rolling-bearing plate for a rotary electric machine

Info

Publication number
EP3707806A1
EP3707806A1 EP18796071.1A EP18796071A EP3707806A1 EP 3707806 A1 EP3707806 A1 EP 3707806A1 EP 18796071 A EP18796071 A EP 18796071A EP 3707806 A1 EP3707806 A1 EP 3707806A1
Authority
EP
European Patent Office
Prior art keywords
flange
nose
machine according
extending
flat portion
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Withdrawn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
EP18796071.1A
Other languages
German (de)
French (fr)
Inventor
Ryadh BEN-OMRANE
Frédéric BOUSSICOT
Slawomir Stencel
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.)
Valeo Equipements Electriques Moteur SAS
Original Assignee
Valeo Equipements Electriques Moteur SAS
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 Valeo Equipements Electriques Moteur SAS filed Critical Valeo Equipements Electriques Moteur SAS
Publication of EP3707806A1 publication Critical patent/EP3707806A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • 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
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring

Definitions

  • the invention relates in particular to a bearing plate for a rotating electrical machine.
  • a reversible machine is a rotating electrical machine able to work in a reversible manner, on the one hand, as an electric generator in alternator function and, on the other hand, as an electric motor for example to start the engine of the motor vehicle .
  • a rotating electrical machine comprises a rotor rotatable about an axis and a fixed stator surrounding the rotor.
  • alternator mode when the rotor is rotating, it induces a magnetic field to the stator which transforms it into electric current to power the vehicle's electrical consumers and recharge the battery.
  • motor mode the stator is electrically powered and induces a magnetic field driving the rotor in rotation.
  • a rotating electrical machine comprises a casing, formed of a front bearing and a rear bearing, surrounding the assembly formed by the rotor and the stator.
  • Each flange has a skirt extending axially in a circumferential direction and a transverse portion extending transversely from one end of the skirt.
  • Each flange further has an opening surrounded by a nose projecting centrally from the transverse portion.
  • the nose makes it possible to house a bearing in contact with a shaft of the machine, the shaft being integral with the rotor rotating inside the stator.
  • the nose is formed of an axially extending side wall and a bottom extending transversely from the side wall and being perforated for the passage of the shaft.
  • the machine further comprises a flat-shaped plate which is in contact with the bearing and fixed on the transverse portion of the flange to axially maintain the bearing.
  • the bearing is thus maintained radially between the side wall and the shaft and axially between the plate and the bottom of the nose.
  • the front flange described above does not make it possible to perform the support function of the adjustment device.
  • One of the solutions consists in creating a specific front flange allowing not to change the dimensions of the bearings of the machine and to maintain an air circulation inside the rotating electrical machine while allowing a fixing of the adjustment device of the machine. the tension of the belt on the crankcase.
  • This solution consists in particular by producing a front flange which has a nose offset to the front of the machine, the offset depending on the thickness of the adjustment device.
  • Such an offset consists of an elongation of the nose forward, in particular of its side wall, without modification of the transverse portion of the flange.
  • the bearing is also shifted forward so as to be in contact with the bottom of the nose. The wafer is then no longer in contact with the bearing and the latter is no longer held axially.
  • the subject of the present invention is therefore a rotary electrical machine, in particular for a motor vehicle, comprising a rotor and a stator forming active parts extending along an axis; a casing surrounding the active parts and comprising at least one flange, the flange having a transverse portion extending substantially radially and a nose projecting from the transverse portion; a bearing housed radially in the nose of the flange; a plate for axially maintaining the bearing.
  • the wafer has a radially extending flat portion and a flange projecting axially from the planar portion for engaging the bearing.
  • the present invention thus makes it possible to maintain the bearing axially without additional parts to make up the clearance between the bearing and the plate.
  • This makes it possible to use a specific flange having a nose offset to the front which allows the use of a belt tension adjusting device improving the operation of the machine.
  • the flange is made of material with the flat portion. This simplifies the manufacture of the wafer.
  • the rim has a flange shape.
  • flange means that a connecting portion, located between the flange and the flat portion, has a chamfered or rounded shape. This makes it possible to reduce the ventilation noise generated by the circulation of air inside the machine.
  • the rim thus forms a cylindrical wall.
  • the axial free end of the flange is in axial contact with a lower face of the bearing.
  • the flat portion has an opening defining an inner periphery and allowing the passage of a shaft of the rotating electrical machine on which is mounted the rotor.
  • the flange extends from an inner periphery of the planar portion.
  • the planar portion has a circular outer periphery. This makes it possible to reduce the aeraulic noise generated by the circulation of air inside the machine.
  • the flat portion could have an outer peripheral portion square or rectangular.
  • the planar portion has a ring shape.
  • the machine further comprises a shaft extending along the axis, carrying the rotor and being in contact with an inner portion of the bearing.
  • the bearing is interposed radially between the shaft and the nose of the flange.
  • the nose has a lateral portion extending substantially axially and a bottom extending transversely from the lateral portion.
  • the bottom has centrally an opening for the passage of the tree.
  • the bearing comprises an inner ring in contact with the shaft and an outer ring in contact with the side wall of the nose, rolling elements such as balls or needles separate the inner and outer rings.
  • rolling elements such as balls or needles separate the inner and outer rings.
  • the rim of the wafer is in contact with the outer ring of the bearing.
  • an inner diameter of the flange is greater than an outer diameter of the shaft.
  • a radial clearance exists between an inner periphery of the flange and the shaft. This allows, on the one hand, to simplify the assembly of the wafer and the shaft and, on the other hand, to avoid friction between the wafer which is fixed and the shaft which has a rotational movement.
  • the nose has a radially extending lateral portion and a bottom extending transversely from the lateral portion.
  • an outer diameter of the flange is smaller than an internal diameter of the lateral portion.
  • a radial clearance exists between an outer periphery of the rim and an inner periphery of the nose. This simplifies assembly of the wafer.
  • the outer diameter of the rim and the internal diameter of the lateral portion may be substantially equal. In other words, these two diameters can be adjusted relative to each other so that the radial clearance present between the parts is substantially zero.
  • the wafer is attached to the flange by means of at least one fixing device. For example, this attachment is made by screwing. Alternatively, the attachment could be made by clipping, gluing or welding.
  • the flat portion of the wafer is attached to the transverse portion of the flange.
  • the flat portion of the wafer is fixed to the transverse portion of the flange, the transverse portion of the flange having a recess in which is inserted the flat portion of the wafer.
  • the wafer does not protrude axially towards the rear of the machine relative to the transverse portion. This makes it possible to reduce the ventilation noise generated by the circulation of air inside the machine.
  • This chamber may also be called groove.
  • the wafer further comprises an indexing means, the indexing means including in particular at least one lug extending radially projecting from the outer periphery of the planar portion. This simplifies the assembly of the machine.
  • the wafer has a slot so that the wafer has an open shape. This simplifies the assembly of the wafer.
  • the wafer may have a closed shape.
  • the side wall of the nose has an axial length greater than that of the bearing so that a device for adjusting the tension of the belt of the thermal engine of the vehicle is coupled with the rotating electrical machine.
  • the present invention also relates to a rotating electrical machine.
  • the rotating electrical machine can advantageously form an alternator, an alternator-starter, a reversible machine or an electric motor.
  • FIG. 1 represents, schematically and partially, a cross-sectional view of a rotating electrical machine according to an exemplary implementation of the invention
  • FIG. 2 represents, schematically and partially, an exploded perspective view of a portion of a rotating electrical machine according to another example of implementation of the invention
  • FIG. 3 represents, schematically and partially, a sectional view of the elements of FIG. 2 when assembled
  • FIG. 4 represents, schematically and partially, a perspective view from below of the elements of FIG. 3.
  • FIG. 1 represents a rotating electrical machine 10 which is compact and polyphase, in particular for a motor vehicle.
  • This rotating electrical machine 10 transforms mechanical energy into electrical energy, into alternator mode, and can operate in motor mode to transform electrical energy into mechanical energy.
  • This rotary electrical machine 10 is, for example, an alternator, an alternator-starter or a reversible machine.
  • the rotary electrical machine 10 comprises a housing 1 1. Inside this housing 1 1, it further comprises a shaft 13, a rotor 12 integral in rotation with the shaft 13 and a stator 15 surrounding the rotor 12. The rotational movement of the rotor 12 is around an X axis.
  • the axial, radial, external and internal denominations refer to the axis X crossing at its center the shaft 13.
  • the axial direction corresponds to the X axis while the radial orientations correspond to the planes concurrent, and in particular perpendicular, to the X axis.
  • the outer or inner denominations are evaluated with respect to the same axis X, the inner denomination corresponding to an element oriented towards the axis, or closer to the axis. axis relative to a second element, the outer denomination designating a distance from the axis.
  • the housing 1 1 comprises a front flange 16 and a rear flange 17 which are assembled together. These flanges 16, 17 are hollow in shape and each carries, centrally, a bearing coupled to a respective ball bearing 18, 19 for the rotational mounting of the shaft 13.
  • the housing 1 1 comprises fixing means 14 allowing the mounting of the rotating electrical machine 10 in the vehicle.
  • a pulley 20 is fixed on a front end of the shaft 13, at the front flange 16, for example by means of a nut bearing on the bottom of the cavity of this pulley. This pulley 20 transmits the rotational movement to the shaft 13 or to the shaft 13 to transmit its rotational movement to the belt.
  • an upper or top or front face being a face oriented in the direction of the pulley while a bottom or bottom or rear face being a face facing away from the pulley.
  • the rear end of the shaft 13 carries, here, slip rings 21 belonging to a manifold 22.
  • Brushes 23 belonging to a brush holder 24 are arranged so as to rub on the slip rings 21.
  • the brush holder 24 is connected to a voltage regulator (not shown).
  • the front flange 16 and the rear flange 17 may furthermore comprise substantially lateral openings for the passage of air in order to allow the cooling of the rotary electric machine by air flow generated by the rotation of a front fan 25 on the front axial face of the rotor 12, that is to say at the front flange 16 and a rear fan 26 on the rear axial face of the rotor , that is to say at the level of the rear flange 17.
  • the rotor 12 is a claw rotor. It has two pole wheels 31. Each pole wheel 31 is formed of a plate 32 and a plurality of claws 33 forming magnetic poles.
  • the plate 32 is of transverse orientation and has, for example, a substantially annular shape.
  • This rotor 12 further comprises a cylindrical core 34 which is interposed axially between the pole wheels 31.
  • this core 34 is formed of two half-cores each belonging to one of the pole wheels.
  • the rotor 12 comprises, between the core 34 and the claws 33, a coil 35 comprising, here, a winding hub and an electric winding on this hub.
  • the slip rings 21 belonging to the collector 22 are connected by wire bonds to said coil 35.
  • the rotor 12 may also comprise magnetic elements interposed between two adjacent claws 33.
  • the stator 15 comprises a body 27 in the form of a pack of sheets with notches, for example of the semi-closed or open type, equipped with slot insulator for mounting an electric winding. 28.
  • This coil 28 passes through the notches of the body 27 and form a front bun 29 and a rear bun 30 on either side of the stator body.
  • the coil 28 is connected, for example, in a star or in a triangle.
  • the winding 28 is formed of one or more phases. Each phase comprises at least one conductor passing through the notches of the stator body 27 and forms, with all phases, the buns.
  • the coil 28 is electrically connected to an electronic assembly 36.
  • the electronic assembly 36 comprises at least one electronic power module for controlling a phase of the coil 28.
  • This power module forms a voltage rectifier bridge to transform the alternating voltage generated by the machine 10 into a DC voltage for supplying the battery and the vehicle electrical system in alternator mode.
  • the rotor When the electric winding is electrically powered from the brushes, the rotor is magnetized and becomes an inductor rotor with formation of magnetic north-south poles at the claws. This inductor rotor creates an alternating induced current in the stator induced when the shaft is rotating. The rectifier bridge then transforms this AC induced current into a direct current, in particular to supply the loads and the consumers of the onboard network of the motor vehicle as well as to recharge its battery.
  • the front flange 16 has a skirt 37 extending in a substantially axial direction, a transverse portion 38 extending in a substantially radial direction from an axial end of the skirt, an opening 40 through extending centrally on the transverse portion and a nose 39 projecting from the transverse portion so as to surround the opening.
  • the opening 40 allows the passage of a front end of the shaft 13 to mount the pulley 20 on the shaft.
  • the nose 39 accommodates the front bearing 18.
  • the nose 39 has a lateral portion 41 extending in a substantially axial direction from an inner periphery of the transverse portion 38 and a bottom 42 extending transversely from the lateral portion and delimiting the opening 40.
  • the nose 39 extends in green projection the front of the machine, that is to say that the nose extends in an opposite direction axially, relative to the portion transverse 38, to that in which the skirt 37 extends.
  • substantially radial means a direction forming an angle of between 80 ° and 100 ° relative to the axis X.
  • substantially axial is understood to mean direction forming an angle between 0 ° and 20 ° with respect to the X axis.
  • the front bearing 18 is positioned in the housing formed by the nose so as to be radially blocked between the side wall 41 and the shaft 13.
  • the bearing 18 is positioned in said housing. in order to be in axial contact with the bottom 42.
  • a plate 43 is arranged to axially lock the bearing between said bottom and itself.
  • the wafer 43 has a substantially radially extending flat portion 44 and a flange 45 projecting from the planar portion.
  • the rim 45 is made of material with the flat portion 44, that is to say that the wafer 43 is made from a single piece.
  • the flat portion 44 has an opening 46 defining an inner periphery of the wafer and allowing the end of the shaft 13 to pass.
  • the flange 45 extends from the inner periphery of the flat portion 44.
  • the flange 45 extends in a substantially axial direction in the same direction as the nose, that is to say towards the front of the machine.
  • the axial free end of the flange is in axial contact with a lower face of the front bearing 18.
  • the flange 45 has a flange shape forming a cylindrical wall.
  • Figure 2 shows another embodiment of the rotating electrical machine in which the housing 1 1 has a different shape to form a cooling chamber in which a coolant can circulate to cool the stator.
  • the skirt 37 of the front flange 16 and that of the rear flange 17 each have suitable shapes for the establishment of such a chamber.
  • the other parts of the machine and in particular the nose 39 of the front flange 16 and the wafer 43 are not modified with respect to the embodiment described in FIG.
  • the flat portion 44 has an outer periphery of circular shape.
  • the wafer 43 is fixed to the front flange 16 and, in particular, the flat portion 44 of the wafer is fixed to the transverse portion 38 of the flange.
  • the flat portion 44 and the transverse portion 38 have, respectively, screwing openings 47 for the passage of screw devices 49 such as screws.
  • the machine has four screwing devices 49 distributed regularly over the circumference of the wafer 43.
  • the transverse portion 38 of the front flange 16 has a recess 50 which extends from the inner periphery of said portion 38 all around the circumference.
  • the recess 50 extends axially over an axial height at least equal to the axial height of the flat portion 44.
  • the recess has a shape adapted to that of the outer periphery of said planar portion.
  • the front bearing 18 is for example a ball bearing or needle.
  • Said bearing comprises an inner ring 51 in contact with a portion of the shaft 13, an outer ring 52 in contact with a portion of the side wall 41 of the nose 39 and rolling elements 53 such as balls or needles separating the rings internal and external.
  • rolling elements 53 such as balls or needles separating the rings internal and external.
  • the rim 45 of the wafer 43 is in axial contact with a rear surface of the outer ring 52, the front surface of said outer ring being in contact with the bottom 42.
  • an inner diameter of the edge 45 of the wafer is greater than an outer diameter of the shaft 13 so that the wafer is not in contact with the shaft.
  • an outer diameter of the flange 45 is smaller than an inner diameter of the lateral portion 41 of the nose 39 so that the wafer is not in contact with the nose.
  • the plate 43 further comprises a means of indexing which is clearly visible in the example of FIG. 4.
  • the indexing means here has two lugs 54 each extending radially outwardly from the outer periphery of FIG. the flat portion 44.
  • the transverse portion 38 of the flange has, here, two housings 55 each receiving one of the lugs 54.
  • the lugs are here arranged diametrically opposite on the periphery of the wafer 43.
  • the part transverse 38 has four housings 55 to allow to simplify the positioning of the wafer 43 which has a symmetrical shape.
  • each lug and each housing have complementary shapes respectively.
  • each lug and each housing have a rounded shape including arcuate.
  • the housings 55 extend in a radial plane from the recess 50, that is to say that the lugs 54 extend in the same plane as at least a portion of the flat portion 44.
  • the indexing means does not protrude axially from the flat portion 44 which allows for a better distribution of harmonics in aeraulic noise.
  • the plate 43 has a slot 56 extending radially so that the wafer has an open shape.
  • the slot 56 thus extends over the flat portion 44 and the rim 45.
  • the slot extends from the opening 46 to the outer periphery of the wafer 43.
  • the slot extends in a substantially radial direction.
  • the present invention finds applications in particular in the field of alternators or reversible machines but it could also apply to any type of rotating machine.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)

Abstract

The present invention proposes a rotary electric machine, notably for a motor vehicle, having: - a rotor (12) and a stator (15) forming active parts extending along an axis (X), - a casing (11) surrounding the active parts and having at least one flange (16), the flange having a transverse portion (38) extending substantially radially and a nose (39) protruding from the transverse portion, - a rolling bearing (18) housed radially in the nose of the flange, and - a plate (43) for axially supporting the rolling bearing. According to the invention, the plate (43) has a radially extending flat portion (44) and a lip (45) protruding axially from the flat portion so as to come into contact with the rolling bearing (18).

Description

PLAQUETTE DE ROULEMENT POUR MACHINE ELECTRIQUE  BEARING PANEL FOR ELECTRIC MACHINE
TOURNANTE  ROTARY
L'invention concerne notamment une plaquette de roulement pour une machine électrique tournante. The invention relates in particular to a bearing plate for a rotating electrical machine.
L'invention trouve une application particulièrement avantageuse dans le domaine des machines électriques tournantes telles que les alternateurs, les alterno-démarreurs ou encore les machines réversibles ou les moteurs électriques. On rappelle qu'une machine réversible est une machine électrique tournante apte à travailler de manière réversible, d'une part, comme générateur électrique en fonction alternateur et, d'autre part, comme moteur électrique par exemple pour démarrer le moteur thermique du véhicule automobile.  The invention finds a particularly advantageous application in the field of rotating electrical machines such as alternators, alternator-starters or even reversible machines or electric motors. It will be recalled that a reversible machine is a rotating electrical machine able to work in a reversible manner, on the one hand, as an electric generator in alternator function and, on the other hand, as an electric motor for example to start the engine of the motor vehicle .
Une machine électrique tournante comprend un rotor mobile en rotation autour d'un axe et un stator fixe entourant le rotor. En mode alternateur, lorsque le rotor est en rotation, il induit un champ magnétique au stator qui le transforme en courant électrique afin d'alimenter les consommateurs électriques du véhicule et de recharger la batterie. En mode moteur, le stator est alimenté électriquement et induit un champ magnétique entraînant le rotor en rotation.  A rotating electrical machine comprises a rotor rotatable about an axis and a fixed stator surrounding the rotor. In alternator mode, when the rotor is rotating, it induces a magnetic field to the stator which transforms it into electric current to power the vehicle's electrical consumers and recharge the battery. In motor mode, the stator is electrically powered and induces a magnetic field driving the rotor in rotation.
Classiquement une machine électrique tournante comprend un carter, formé d'un palier avant et d'un palier arrière, venant entourer l'ensemble formé par le rotor et le stator. Chaque flasque présente une jupe s'étendant axialement suivant une direction circonférentielle et une portion transversale s'étendant transversalement à partir d'une extrémité de la jupe. Chaque flasque présente, en outre, présente une ouverture entourée d'un nez s'étendant en saillie centralement à partie de la portion transversale. Le nez permet de loger un roulement en contact avec un arbre de la machine, l'arbre étant solidaire du rotor tournant à l'intérieur du stator. Le nez est formé d'une paroi latérale s'étendant axialement et d'un fond s'étendant transversalement à partir de la paroi latérale et étant ajouré pour le passage de l'arbre. La machine comporte, en outre, une plaquette de forme plane qui est en contact avec le roulement et fixée sur la portion transversale du flasque pour maintenir axialement le roulement. Le roulement est ainsi maintenu radialement entre la paroi latérale et l'arbre et axialement entre la plaquette et le fond du nez. Conventionally a rotating electrical machine comprises a casing, formed of a front bearing and a rear bearing, surrounding the assembly formed by the rotor and the stator. Each flange has a skirt extending axially in a circumferential direction and a transverse portion extending transversely from one end of the skirt. Each flange further has an opening surrounded by a nose projecting centrally from the transverse portion. The nose makes it possible to house a bearing in contact with a shaft of the machine, the shaft being integral with the rotor rotating inside the stator. The nose is formed of an axially extending side wall and a bottom extending transversely from the side wall and being perforated for the passage of the shaft. The machine further comprises a flat-shaped plate which is in contact with the bearing and fixed on the transverse portion of the flange to axially maintain the bearing. The bearing is thus maintained radially between the side wall and the shaft and axially between the plate and the bottom of the nose.
Il est avantageux d'ajouter à la machine un dispositif de réglage de la tension de la courroie, par exemple décrit dans les brevets AT 130902 et EP 0 459 894 auxquels on se reportera pour plus de précisions. Ce dispositif de réglage permet d'obtenir une tension optimale de la courroie en évitant un glissement de la courroie et en filtrant les vibrations qui peuvent nuire au bon fonctionnement de la machine électrique tournante.  It is advantageous to add to the machine a device for adjusting the tension of the belt, for example described in patents AT 130902 and EP 0 459 894 to which reference will be made for more details. This adjustment device makes it possible to obtain an optimal tension of the belt by preventing a slipping of the belt and by filtering the vibrations which can impede the smooth operation of the rotating electrical machine.
Un problème se pose alors car les flasques classiquement utilisés dans ce type de machine sont différents de ceux décrits dans les brevets précités. En particulier, le flasque avant décrit précédemment ne permet pas de réaliser la fonction de support du dispositif de réglage. Une des solutions consiste à créer un flasque avant spécifique permettant de ne pas changer les dimensions des roulements de la machine et de conserver une circulation de l'air à l'intérieur de la machine électrique tournante tout en permettant une fixation du dispositif de réglage de la tension de la courroie sur le carter. Cette solution consiste notamment en réalisant un flasque avant qui présente un nez décalé vers l'avant de la machine, le décalage dépendant de l'épaisseur du dispositif de réglage.  A problem arises then because the flasks conventionally used in this type of machine are different from those described in the aforementioned patents. In particular, the front flange described above does not make it possible to perform the support function of the adjustment device. One of the solutions consists in creating a specific front flange allowing not to change the dimensions of the bearings of the machine and to maintain an air circulation inside the rotating electrical machine while allowing a fixing of the adjustment device of the machine. the tension of the belt on the crankcase. This solution consists in particular by producing a front flange which has a nose offset to the front of the machine, the offset depending on the thickness of the adjustment device.
Un tel décalage consiste en un allongement du nez vers l'avant, en particulier de sa paroi latérale, sans modification de la portion transversale du flasque. Le roulement est, lui aussi, décalé vers l'avant de manière à être en contact avec le fond du nez. La plaquette n'est alors plus en contact avec le roulement et ce dernier n'est plus maintenu axialement.  Such an offset consists of an elongation of the nose forward, in particular of its side wall, without modification of the transverse portion of the flange. The bearing is also shifted forward so as to be in contact with the bottom of the nose. The wafer is then no longer in contact with the bearing and the latter is no longer held axially.
Une solution consiste à insérer une pièce supplémentaire entre le roulement et la plaquette pour rattraper le décalage. Cependant, une telle pièce supplémentaire complexifie et allonge le procédé d'assemblage de la machine électrique tournante. En outre, une telle pièce augmente les problèmes de serrage et de précision mécanique du montage en apportant des tolérances mécaniques supplémentaires.  One solution is to insert an additional piece between the bearing and the plate to make up for the offset. However, such an additional piece complicates and lengthens the assembly process of the rotating electrical machine. In addition, such a part increases the problems of tightening and mechanical precision of the assembly by providing additional mechanical tolerances.
La présente invention vise à permettre d'éviter les inconvénients de l'art antérieur. A cet effet, la présente invention a donc pour objet une machine électrique tournante, notamment pour véhicule automobile, comportant un rotor et un stator formant des parties actives s'étendant suivant un axe ; un carter entourant les parties actives et comportant au moins un flasque, le flasque présentant une portion transversale s'étendant sensiblement radialement et un nez s'étendant en saillie à partir de la portion transversale ; un roulement logé radialement dans le nez du flasque ; une plaquette permettant un maintien axial du roulement. Selon la présente invention, la plaquette présente une portion plane s'étendant radialement et un rebord s'étendant en saillie axialement à partir de la portion plane pour venir en contact avec le roulement. The present invention aims to avoid the disadvantages of the prior art. For this purpose, the subject of the present invention is therefore a rotary electrical machine, in particular for a motor vehicle, comprising a rotor and a stator forming active parts extending along an axis; a casing surrounding the active parts and comprising at least one flange, the flange having a transverse portion extending substantially radially and a nose projecting from the transverse portion; a bearing housed radially in the nose of the flange; a plate for axially maintaining the bearing. According to the present invention, the wafer has a radially extending flat portion and a flange projecting axially from the planar portion for engaging the bearing.
La présente invention permet donc de maintenir axialement le roulement sans pièce supplémentaire pour rattraper le jeu entre le roulement et la plaquette. Cela permet de pouvoir utiliser un flasque spécifique ayant un nez décalé vers l'avant qui permet l'utilisation d'un dispositif de réglage de la tension de la courroie améliorant le fonctionnement de la machine.  The present invention thus makes it possible to maintain the bearing axially without additional parts to make up the clearance between the bearing and the plate. This makes it possible to use a specific flange having a nose offset to the front which allows the use of a belt tension adjusting device improving the operation of the machine.
Selon une réalisation, le rebord est issu de matière avec la portion plane. Cela permet de simplifier la fabrication de la plaquette.  In one embodiment, the flange is made of material with the flat portion. This simplifies the manufacture of the wafer.
Selon une réalisation, le rebord présente une forme de collerette. On entend par « collerette » qu'une portion de liaison, située entre le rebord et la portion plane, présente une forme chanfreinée ou arrondie. Cela permet de diminuer le bruit aéraulique engendré par la circulation d'air à l'intérieur de la machine. Par exemple, le rebord forme ainsi une paroi cylindrique.  In one embodiment, the rim has a flange shape. The term "flange" means that a connecting portion, located between the flange and the flat portion, has a chamfered or rounded shape. This makes it possible to reduce the ventilation noise generated by the circulation of air inside the machine. For example, the rim thus forms a cylindrical wall.
Selon une réalisation, l'extrémité libre axiale du rebord est en contact axial avec une face inférieure du roulement.  In one embodiment, the axial free end of the flange is in axial contact with a lower face of the bearing.
Selon une réalisation, la portion plane présente une ouverture délimitant une périphérie interne et permettant le passage d'un arbre de la machine électrique tournante sur lequel est monté le rotor.  According to one embodiment, the flat portion has an opening defining an inner periphery and allowing the passage of a shaft of the rotating electrical machine on which is mounted the rotor.
Selon une réalisation, le rebord s'étend à partir d'une périphérie interne de la portion plane.  In one embodiment, the flange extends from an inner periphery of the planar portion.
Selon une réalisation, la portion plane présente une périphérie externe circulaire. Cela permet de diminuer le bruit aéraulique engendré par la circulation d'air à l'intérieur de la machine. Alternativement, la portion plane pourrait présenter une portion périphérique externe carrée ou rectangulaire. In one embodiment, the planar portion has a circular outer periphery. This makes it possible to reduce the aeraulic noise generated by the circulation of air inside the machine. Alternatively, the flat portion could have an outer peripheral portion square or rectangular.
Par exemple, la portion plane présente une forme d'anneau.  For example, the planar portion has a ring shape.
Selon une réalisation, la machine comporte, en outre, un arbre s'étendant suivant l'axe, portant le rotor et étant en contact avec une portion interne du roulement. Par exemple, le roulement est interposé radialement entre l'arbre et le nez du flasque.  According to one embodiment, the machine further comprises a shaft extending along the axis, carrying the rotor and being in contact with an inner portion of the bearing. For example, the bearing is interposed radially between the shaft and the nose of the flange.
Selon une réalisation, le nez présente une portion latérale s'étendant sensiblement axialement et un fond s'étendant transversalement à partir de la portion latérale. En l'occurrence, le fond présente centralement une ouverture pour le passage de l'arbre.  In one embodiment, the nose has a lateral portion extending substantially axially and a bottom extending transversely from the lateral portion. In this case, the bottom has centrally an opening for the passage of the tree.
Selon une réalisation, le roulement comporte une bague interne en contact avec l'arbre et une bague externe en contact avec la paroi latérale du nez, des éléments roulants tels que des billes ou des aiguilles séparent les bagues interne et externe. Par exemple, le rebord de la plaquette est en contact avec la bague externe du roulement.  According to one embodiment, the bearing comprises an inner ring in contact with the shaft and an outer ring in contact with the side wall of the nose, rolling elements such as balls or needles separate the inner and outer rings. For example, the rim of the wafer is in contact with the outer ring of the bearing.
Selon une réalisation, un diamètre interne du rebord est supérieur à un diamètre externe de l'arbre. Ainsi, un jeu radial existe entre une périphérie interne du rebord et l'arbre. Cela permet, d'une part, de simplifier l'assemblage de la plaquette et de l'arbre et, d'autre part, d'éviter un frottement entre la plaquette qui est fixe et l'arbre qui présente un mouvement de rotation.  In one embodiment, an inner diameter of the flange is greater than an outer diameter of the shaft. Thus, a radial clearance exists between an inner periphery of the flange and the shaft. This allows, on the one hand, to simplify the assembly of the wafer and the shaft and, on the other hand, to avoid friction between the wafer which is fixed and the shaft which has a rotational movement.
Selon une réalisation, le nez comporte une portion latérale s'étendant radialement et un fond s'étendant transversalement à partir de la portion latérale. Dans cette réalisation, un diamètre externe du rebord est inférieur à un diamètre interne de la portion latérale. Ainsi, un jeu radial existe entre une périphérie externe du rebord et une périphérie interne du nez. Cela permet de simplifier l'assemblage de la plaquette. Alternativement, le diamètre externe du rebord et le diamètre interne de la portion latérale peuvent être sensiblement égaux. Autrement dit, ces deux diamètres peuvent être ajustés l'un par rapport à l'autre de manière à ce que le jeu radial présent entre les pièces soit sensiblement nul. Selon une réalisation, la plaquette est fixée au flasque au moyen d'au moins un dispositif de fixation. Par exemple, cette fixation est réalisée par vissage. Alternativement, la fixation pourrait être réalisée par clipsage, collage ou encore soudage. Par exemple, la portion plane de la plaquette est fixée à la portion transversale du flasque. In one embodiment, the nose has a radially extending lateral portion and a bottom extending transversely from the lateral portion. In this embodiment, an outer diameter of the flange is smaller than an internal diameter of the lateral portion. Thus, a radial clearance exists between an outer periphery of the rim and an inner periphery of the nose. This simplifies assembly of the wafer. Alternatively, the outer diameter of the rim and the internal diameter of the lateral portion may be substantially equal. In other words, these two diameters can be adjusted relative to each other so that the radial clearance present between the parts is substantially zero. In one embodiment, the wafer is attached to the flange by means of at least one fixing device. For example, this attachment is made by screwing. Alternatively, the attachment could be made by clipping, gluing or welding. For example, the flat portion of the wafer is attached to the transverse portion of the flange.
Selon une réalisation, la portion plane de la plaquette est fixée à la portion transversale du flasque, la portion transversale du flasque comportant un chambrage dans lequel est insérée la portion plane de la plaquette. Ainsi, la plaquette ne dépasse pas axialement vers l'arrière de la machine par rapport à la portion transversale. Cela permet de diminuer le bruit aéraulique engendré par la circulation d'air à l'intérieur de la machine. Ce chambrage peut également être appelé rainure.  In one embodiment, the flat portion of the wafer is fixed to the transverse portion of the flange, the transverse portion of the flange having a recess in which is inserted the flat portion of the wafer. Thus, the wafer does not protrude axially towards the rear of the machine relative to the transverse portion. This makes it possible to reduce the ventilation noise generated by the circulation of air inside the machine. This chamber may also be called groove.
Selon une réalisation, la plaquette comporte, en outre, un moyen d'indexage, le moyen d'indexage comportant notamment au moins un ergot s'étendant en saillie radiale à partir de la périphérie externe de la portion plane. Cela permet de simplifier l'assemblage de la machine.  According to one embodiment, the wafer further comprises an indexing means, the indexing means including in particular at least one lug extending radially projecting from the outer periphery of the planar portion. This simplifies the assembly of the machine.
Selon une réalisation, la plaquette présente une fente de manière à ce que la plaquette présente une forme ouverte. Cela permet de simplifier le montage de la plaquette. Alternativement, la plaquette peut présenter une forme fermée.  In one embodiment, the wafer has a slot so that the wafer has an open shape. This simplifies the assembly of the wafer. Alternatively, the wafer may have a closed shape.
Selon une réalisation, la paroi latérale du nez présente une longueur axiale supérieure à celle du roulement de manière à ce qu'un dispositif de réglage de la tension de la courroie du moteur thermique du véhicule soit couplé avec la machine électrique tournante.  In one embodiment, the side wall of the nose has an axial length greater than that of the bearing so that a device for adjusting the tension of the belt of the thermal engine of the vehicle is coupled with the rotating electrical machine.
La présente invention a également pour objet une machine électrique tournante. La machine électrique tournante peut, avantageusement, former un alternateur, un alterno-démarreur, une machine réversible ou un moteur électrique.  The present invention also relates to a rotating electrical machine. The rotating electrical machine can advantageously form an alternator, an alternator-starter, a reversible machine or an electric motor.
La présente invention pourra être mieux comprise à la lecture de la description détaillée qui va suivre, d'exemples de mise en œuvre non limitatifs de l'invention et de l'examen des dessins annexés, sur lesquels : - la figure 1 représente, schématiquement et partiellement, une vue en coupe d'une machine électrique tournante selon un exemple de mise en œuvre de l'invention, The present invention may be better understood on reading the following detailed description of examples of non-limiting implementation of the invention and of examining the appended drawings, in which: FIG. 1 represents, schematically and partially, a cross-sectional view of a rotating electrical machine according to an exemplary implementation of the invention,
- la figure 2 représente, schématiquement et partiellement, une vue éclatée en perspective d'une partie d'une machine électrique tournante selon un autre exemple de mise en œuvre de l'invention,  FIG. 2 represents, schematically and partially, an exploded perspective view of a portion of a rotating electrical machine according to another example of implementation of the invention,
- la figure 3 représente, schématiquement et partiellement, une vue en coupe des éléments de la figure 2 une fois assemblé, et  FIG. 3 represents, schematically and partially, a sectional view of the elements of FIG. 2 when assembled, and
- la figure 4 représente, schématiquement et partiellement, une vue en perspective de dessous des éléments de la figure 3.  FIG. 4 represents, schematically and partially, a perspective view from below of the elements of FIG. 3.
Les éléments identiques, similaires ou analogues conservent les mêmes références d'une figure à l'autre.  Identical, similar or similar elements retain the same references from one figure to another.
Les modes de réalisation qui sont décrits dans la suite ne sont nullement limitatifs ; on pourra notamment imaginer des variantes de l'invention ne comprenant qu'une sélection de caractéristiques décrites par la suite isolées des autres caractéristiques décrites, si cette sélection de caractéristiques est suffisante pour conférer un avantage technique ou pour différencier l'invention par rapport à l'état de la technique antérieur. En particulier toutes les variantes et tous les modes de réalisation décrits sont combinables entre eux si rien ne s'oppose à cette combinaison sur le plan technique. Dans un tel cas, mention serait faite dans la présente description.  The embodiments which are described below are in no way limiting; it will be possible to imagine variants of the invention comprising only a selection of characteristics described hereinafter isolated from the other characteristics described, if this selection of characteristics is sufficient to confer a technical advantage or to differentiate the invention compared to the state of the art. In particular, all the variants and all the embodiments described are combinable with each other if nothing stands in the way of this combination at the technical level. In such a case, mention would be made in the present description.
La figure 1 représente une machine électrique tournante 10 compacte et polyphasée, notamment pour véhicule automobile. Cette machine électrique tournante 10 transforme de l'énergie mécanique en énergie électrique, en mode alternateur, et peut fonctionner en mode moteur pour transformer de l'énergie électrique en énergie mécanique. Cette machine électrique tournante 10 est, par exemple, un alternateur, un alterno-démarreur ou une machine réversible.  FIG. 1 represents a rotating electrical machine 10 which is compact and polyphase, in particular for a motor vehicle. This rotating electrical machine 10 transforms mechanical energy into electrical energy, into alternator mode, and can operate in motor mode to transform electrical energy into mechanical energy. This rotary electrical machine 10 is, for example, an alternator, an alternator-starter or a reversible machine.
La machine électrique tournante 10 comporte un carter 1 1 . A l'intérieur de ce carter 1 1 , elle comporte, en outre, un arbre 13, un rotor 12 solidaire en rotation de l'arbre 13 et un stator 15 entourant le rotor 12. Le mouvement de rotation du rotor 12 se fait autour d'un axe X. Dans la suite de la description, les dénominations axiales, radiales, extérieures et intérieures se réfèrent à l'axe X traversant en son centre l'arbre 13. La direction axiale correspond à l'axe X alors que les orientations radiales correspondent à des plans concourants, et notamment perpendiculaires, à l'axe X. Pour les directions radiales, les dénominations extérieure ou intérieure s'apprécient par rapport au même axe X, la dénomination intérieure correspondant à un élément orienté vers l'axe, ou plus proche de l'axe par rapport à un second élément, la dénomination extérieure désignant un éloignement de l'axe. The rotary electrical machine 10 comprises a housing 1 1. Inside this housing 1 1, it further comprises a shaft 13, a rotor 12 integral in rotation with the shaft 13 and a stator 15 surrounding the rotor 12. The rotational movement of the rotor 12 is around an X axis. In the remainder of the description, the axial, radial, external and internal denominations refer to the axis X crossing at its center the shaft 13. The axial direction corresponds to the X axis while the radial orientations correspond to the planes concurrent, and in particular perpendicular, to the X axis. For the radial directions, the outer or inner denominations are evaluated with respect to the same axis X, the inner denomination corresponding to an element oriented towards the axis, or closer to the axis. axis relative to a second element, the outer denomination designating a distance from the axis.
Dans cet exemple, le carter 1 1 comporte un flasque avant 16 et un flasque arrière 17 qui sont assemblés ensemble. Ces flasques 16, 17 sont de forme creuse et portent, chacun, centralement un palier accouplé à un roulement à billes 18, 19 respectif pour le montage à rotation de l'arbre 13. En outre, le carter 1 1 comporte des moyens de fixation 14 permettant le montage de la machine électrique tournante 10 dans le véhicule.  In this example, the housing 1 1 comprises a front flange 16 and a rear flange 17 which are assembled together. These flanges 16, 17 are hollow in shape and each carries, centrally, a bearing coupled to a respective ball bearing 18, 19 for the rotational mounting of the shaft 13. In addition, the housing 1 1 comprises fixing means 14 allowing the mounting of the rotating electrical machine 10 in the vehicle.
Une poulie 20 est fixée sur une extrémité avant de l'arbre 13, au niveau du flasque avant 16, par exemple à l'aide d'un écrou en appui sur le fond de la cavité de cette poulie. Cette poulie 20 permet de transmettre le mouvement de rotation à l'arbre 13 ou à l'arbre 13 de transmettre son mouvement de rotation à la courroie.  A pulley 20 is fixed on a front end of the shaft 13, at the front flange 16, for example by means of a nut bearing on the bottom of the cavity of this pulley. This pulley 20 transmits the rotational movement to the shaft 13 or to the shaft 13 to transmit its rotational movement to the belt.
Dans la suite de la description, les dénominations supérieures et inférieures ainsi que dessus/dessous ou encore avant/arrière se réfèrent à la poulie 20. Ainsi une face supérieure ou de dessus ou avant étant une face orientée en direction de la poulie alors qu'une face inférieure ou de dessous ou arrière étant une face orientée en direction opposée de la poulie.  In the remainder of the description, the names upper and lower as well as above / below or before / back refer to the pulley 20. Thus an upper or top or front face being a face oriented in the direction of the pulley while a bottom or bottom or rear face being a face facing away from the pulley.
L'extrémité arrière de l'arbre 13 porte, ici, des bagues collectrices 21 appartenant à un collecteur 22. Des balais 23 appartenant à un porte- balais 24 sont disposés de façon à frotter sur les bagues collectrices 21 . Le porte-balais 24 est relié à un régulateur de tension (non représenté).  The rear end of the shaft 13 carries, here, slip rings 21 belonging to a manifold 22. Brushes 23 belonging to a brush holder 24 are arranged so as to rub on the slip rings 21. The brush holder 24 is connected to a voltage regulator (not shown).
Le flasque avant 16 et le flasque arrière 17 peuvent comporter, en outre, des ouvertures sensiblement latérales pour le passage de l'air en vue de permettre le refroidissement de la machine électrique tournante par circulation d'air engendrée par la rotation d'un ventilateur avant 25 sur la face axiale avant du rotor 12, c'est-à-dire au niveau du flasque avant 16 et d'un ventilateur arrière 26 sur la face axiale arrière du rotor, c'est-à-dire au niveau du flasque arrière 17. The front flange 16 and the rear flange 17 may furthermore comprise substantially lateral openings for the passage of air in order to allow the cooling of the rotary electric machine by air flow generated by the rotation of a front fan 25 on the front axial face of the rotor 12, that is to say at the front flange 16 and a rear fan 26 on the rear axial face of the rotor , that is to say at the level of the rear flange 17.
Dans cet exemple, le rotor 12 est un rotor à griffe. Il comporte deux roues polaires 31 . Chaque roue polaire 31 est formée d'un plateau 32 et d'une pluralité de griffes 33 formants des pôles magnétiques. Le plateau 32 est d'orientation transversale et présente, par exemple, une forme sensiblement annulaire. Ce rotor 12 comporte, en outre, un noyau 34 cylindrique qui est intercalé axialement entre les roues polaires 31 . Ici, ce noyau 34 est formé de deux demi noyaux appartenant chacun à l'une des roues polaires. Le rotor 12 comporte, entre le noyau 34 et les griffes 33, une bobine 35 comportant, ici, un moyeu de bobinage et un bobinage électrique sur ce moyeu. Par exemple, les bagues collectrices 21 appartenant au collecteur 22 sont reliées par des liaisons filaires à ladite bobine 35. Le rotor 12 peut également comporter des éléments magnétiques interposés entre deux griffes 33 adjacentes.  In this example, the rotor 12 is a claw rotor. It has two pole wheels 31. Each pole wheel 31 is formed of a plate 32 and a plurality of claws 33 forming magnetic poles. The plate 32 is of transverse orientation and has, for example, a substantially annular shape. This rotor 12 further comprises a cylindrical core 34 which is interposed axially between the pole wheels 31. Here, this core 34 is formed of two half-cores each belonging to one of the pole wheels. The rotor 12 comprises, between the core 34 and the claws 33, a coil 35 comprising, here, a winding hub and an electric winding on this hub. For example, the slip rings 21 belonging to the collector 22 are connected by wire bonds to said coil 35. The rotor 12 may also comprise magnetic elements interposed between two adjacent claws 33.
Dans cet exemple de réalisation, le stator 15 comporte un corps 27 en forme d'un paquet de tôles doté d'encoches, par exemple du type semi fermée ou ouverte, équipées d'isolant d'encoches pour le montage d'un bobinage électrique 28. Ce bobinage 28 traverse les encoches du corps 27 et forment un chignon avant 29 et un chignon arrière 30 de part et d'autre du corps du stator. Le bobinage 28 est connecté, par exemple, en étoile ou encore en triangle.  In this exemplary embodiment, the stator 15 comprises a body 27 in the form of a pack of sheets with notches, for example of the semi-closed or open type, equipped with slot insulator for mounting an electric winding. 28. This coil 28 passes through the notches of the body 27 and form a front bun 29 and a rear bun 30 on either side of the stator body. The coil 28 is connected, for example, in a star or in a triangle.
Par ailleurs, le bobinage 28 est formé d'une ou plusieurs phases. Chaque phase comporte au moins un conducteur traversant les encoches du corps de stator 27 et forme, avec toutes les phases, les chignons. Le bobinage 28 est relié électriquement à un ensemble électronique 36.  Moreover, the winding 28 is formed of one or more phases. Each phase comprises at least one conductor passing through the notches of the stator body 27 and forms, with all phases, the buns. The coil 28 is electrically connected to an electronic assembly 36.
L'ensemble électronique 36 comporte au moins un module électronique de puissance permettant de piloter une phase du bobinage 28. Ce module de puissance forme un pont redresseur de tension pour transformer la tension alternative générée par la machine 10 en une tension continue pour alimenter notamment la batterie et le réseau de bord du véhicule en mode alternateur. The electronic assembly 36 comprises at least one electronic power module for controlling a phase of the coil 28. This power module forms a voltage rectifier bridge to transform the alternating voltage generated by the machine 10 into a DC voltage for supplying the battery and the vehicle electrical system in alternator mode.
Lorsque le bobinage électrique est alimenté électriquement à partir des balais, le rotor est magnétisé et devient un rotor inducteur avec formation de pôles magnétiques Nord-Sud au niveau des griffes. Ce rotor inducteur crée un courant induit alternatif dans le stator induit lorsque l'arbre est en rotation. Le pont redresseur transforme alors ce courant induit alternatif en un courant continu, notamment pour alimenter les charges et les consommateurs du réseau de bord du véhicule automobile ainsi que pour recharger sa batterie.  When the electric winding is electrically powered from the brushes, the rotor is magnetized and becomes an inductor rotor with formation of magnetic north-south poles at the claws. This inductor rotor creates an alternating induced current in the stator induced when the shaft is rotating. The rectifier bridge then transforms this AC induced current into a direct current, in particular to supply the loads and the consumers of the onboard network of the motor vehicle as well as to recharge its battery.
Comme illustré sur la figure 1 , le flasque avant 16 présente une jupe 37 s'étendant dans une direction sensiblement axiale, une portion transversale 38 s'étendant dans une direction sensiblement radiale à partir d'une extrémité axiale de la jupe, une ouverture 40 traversante s'étendant centralement sur la portion transversale et un nez 39 s'étendant en saillie à partir de la portion transversale de manière à entourer l'ouverture. L'ouverture 40 permet le passage d'une extrémité avant de l'arbre 13 afin de monter la poulie 20 sur l'arbre. Le nez 39 permet de loger le roulement avant 18. Le nez 39 présente une portion latérale 41 s'étendant dans une direction sensiblement axiale à partir d'une périphérie interne de la portion transversale 38 et un fond 42 s'étendant transversalement à partir de la portion latérale et délimitant l'ouverture 40. Le nez 39 s'étend en saillie vert l'avant de la machine, c'est-à-dire que le nez s'étend dans une direction opposée axialement, par rapport à la portion transversale 38, à celle dans laquelle s'étend la jupe 37.  As illustrated in FIG. 1, the front flange 16 has a skirt 37 extending in a substantially axial direction, a transverse portion 38 extending in a substantially radial direction from an axial end of the skirt, an opening 40 through extending centrally on the transverse portion and a nose 39 projecting from the transverse portion so as to surround the opening. The opening 40 allows the passage of a front end of the shaft 13 to mount the pulley 20 on the shaft. The nose 39 accommodates the front bearing 18. The nose 39 has a lateral portion 41 extending in a substantially axial direction from an inner periphery of the transverse portion 38 and a bottom 42 extending transversely from the lateral portion and delimiting the opening 40. The nose 39 extends in green projection the front of the machine, that is to say that the nose extends in an opposite direction axially, relative to the portion transverse 38, to that in which the skirt 37 extends.
Dans l'ensemble de la description et dans les revendications, on entend par « sensiblement radial » une direction formant un angle compris entre 80° et 100° par rapport à l'axe X. De même, on entend par « sensiblement axial » une direction formant un angle compris entre 0° et 20° par rapport à l'axe X.  Throughout the description and in the claims, the term "substantially radial" means a direction forming an angle of between 80 ° and 100 ° relative to the axis X. Similarly, "substantially axial" is understood to mean direction forming an angle between 0 ° and 20 ° with respect to the X axis.
Le roulement avant 18 est positionné dans le logement formé par le nez de manière à être radialement bloqué entre la paroi latérale 41 et l'arbre 13. En outre, le roulement 18 est positionné dans ledit logement de manière à être en contact axial avec le fond 42. Une plaquette 43 est disposée de manière à bloquer axialement le roulement entre ledit fond et elle-même. The front bearing 18 is positioned in the housing formed by the nose so as to be radially blocked between the side wall 41 and the shaft 13. In addition, the bearing 18 is positioned in said housing. in order to be in axial contact with the bottom 42. A plate 43 is arranged to axially lock the bearing between said bottom and itself.
La plaquette 43 comporte une portion plane 44 s'étendant de manière sensiblement radiale et un rebord 45 s'étendant en saillie à partir de la portion plane. Le rebord 45 est issu de matière avec la portion plane 44, c'est-à-dire que la plaquette 43 est réalisée à partir d'une seule et même pièce. La portion plane 44 présente une ouverture 46 délimitant une périphérie interne de la plaquette et permettant le passage de l'extrémité de l'arbre 13. Le rebord 45 s'étend à partir de la périphérie interne de la portion plane 44. En outre, le rebord 45 s'étend dans une direction sensiblement axiale dans le même sens que le nez, c'est-à-dire vers l'avant de la machine. Ainsi, l'extrémité libre axiale du rebord est en contact axial avec une face inférieure du roulement avant 18. Le rebord 45 présente une forme de collerette formant une paroi cylindrique.  The wafer 43 has a substantially radially extending flat portion 44 and a flange 45 projecting from the planar portion. The rim 45 is made of material with the flat portion 44, that is to say that the wafer 43 is made from a single piece. The flat portion 44 has an opening 46 defining an inner periphery of the wafer and allowing the end of the shaft 13 to pass. The flange 45 extends from the inner periphery of the flat portion 44. In addition, the flange 45 extends in a substantially axial direction in the same direction as the nose, that is to say towards the front of the machine. Thus, the axial free end of the flange is in axial contact with a lower face of the front bearing 18. The flange 45 has a flange shape forming a cylindrical wall.
La figure 2 présente un autre mode de réalisation de la machine électrique tournante dans laquelle le carter 1 1 présente une forme différente afin de former une chambre de refroidissement dans laquelle un liquide de refroidissement peut circuler pour refroidir le stator. En particulier, la jupe 37 du flasque avant 16 et celle du flasque arrière 17 présente chacune des formes adaptées pour la mise en place d'une telle chambre. Les autres parties de la machine et notamment le nez 39 du flasque avant 16 et la plaquette 43 ne sont pas modifiées par rapport au mode de réalisation décrit sur la figure 1 .  Figure 2 shows another embodiment of the rotating electrical machine in which the housing 1 1 has a different shape to form a cooling chamber in which a coolant can circulate to cool the stator. In particular, the skirt 37 of the front flange 16 and that of the rear flange 17 each have suitable shapes for the establishment of such a chamber. The other parts of the machine and in particular the nose 39 of the front flange 16 and the wafer 43 are not modified with respect to the embodiment described in FIG.
Comme bien visible sur la figure 2, la portion plane 44 présente une périphérie externe de forme circulaire.  As clearly visible in FIG. 2, the flat portion 44 has an outer periphery of circular shape.
Dans l'exemple de réalisation de la figure 2, la plaquette 43 est fixée au flasque avant 16 et, en particulier, la portion plane 44 de la plaquette est fixée à la portion transversale 38 du flasque. Par exemple ici, la portion plane 44 et la portion transversale 38 présentent, respectivement, des ouvertures de vissage 47 permettant le passage de dispositifs de vissage 49 tel que des vis. Dans cet exemple, la machine comporte quatre dispositifs de vissage 49 répartis de manière régulière sur la circonférence de la plaquette 43. In the embodiment of Figure 2, the wafer 43 is fixed to the front flange 16 and, in particular, the flat portion 44 of the wafer is fixed to the transverse portion 38 of the flange. For example here, the flat portion 44 and the transverse portion 38 have, respectively, screwing openings 47 for the passage of screw devices 49 such as screws. In this example, the machine has four screwing devices 49 distributed regularly over the circumference of the wafer 43.
Comme bien visible dans l'exemple de la figure 3, la portion transversale 38 du flasque avant 16 comporte un chambrage 50 qui s'étend à partir de la périphérie interne de ladite portion 38 sur toute la circonférence. Par exemple, le chambrage 50 s'étend axialement sur une hauteur axiale au moins égale à la hauteur axiale de la portion plane 44. Toujours par exemple, le chambrage présente une forme adaptée à celle de la périphérie externe de ladite portion plane. Ainsi, la portion plane 44 est insérée dans le chambrage et ne dépasse pas axialement par rapport à la portion transversale 38.  As clearly visible in the example of FIG. 3, the transverse portion 38 of the front flange 16 has a recess 50 which extends from the inner periphery of said portion 38 all around the circumference. For example, the recess 50 extends axially over an axial height at least equal to the axial height of the flat portion 44. Still for example, the recess has a shape adapted to that of the outer periphery of said planar portion. Thus, the flat portion 44 is inserted into the recess and does not protrude axially with respect to the transverse portion 38.
Le roulement avant 18 est par exemple un roulement à billes ou à aiguilles. Ledit roulement comporte une bague interne 51 en contact avec une portion de l'arbre 13, une bague externe 52 en contact avec une portion de la paroi latérale 41 du nez 39 et des éléments roulants 53 tels que des billes ou des aiguilles séparant les bagues interne et externe. Comme bien visible sur la figure 3, le rebord 45 de la plaquette 43 est en contact axial avec une surface arrière de la bague externe 52, la surface avant de ladite bague externe étant en contact avec le fond 42.  The front bearing 18 is for example a ball bearing or needle. Said bearing comprises an inner ring 51 in contact with a portion of the shaft 13, an outer ring 52 in contact with a portion of the side wall 41 of the nose 39 and rolling elements 53 such as balls or needles separating the rings internal and external. As clearly visible in FIG. 3, the rim 45 of the wafer 43 is in axial contact with a rear surface of the outer ring 52, the front surface of said outer ring being in contact with the bottom 42.
Dans cet exemple, un diamètre interne du rebord 45 de la plaquette est supérieur à un diamètre externe de l'arbre 13 de manière à ce que la plaquette ne soit pas en contact avec l'arbre.  In this example, an inner diameter of the edge 45 of the wafer is greater than an outer diameter of the shaft 13 so that the wafer is not in contact with the shaft.
En outre, dans cet exemple, un diamètre externe du rebord 45 est inférieur à un diamètre interne de la portion latérale 41 du nez 39 de manière à ce que la plaquette ne soit pas en contact avec le nez.  In addition, in this example, an outer diameter of the flange 45 is smaller than an inner diameter of the lateral portion 41 of the nose 39 so that the wafer is not in contact with the nose.
La plaquette 43 comporte, en outre, un moyen d'indexage bien visible sur l'exemple de la figure 4. Le moyen d'indexage présente, ici, deux ergots 54 s'étendant chacun en saillie radiale à partir de la périphérie externe de la portion plane 44. La portion transversale 38 du flasque présente, ici, deux logements 55 recevant chacun un des ergots 54. Les ergots sont, ici, disposés de manière diamétralement opposé sur la périphérie de la plaquette 43. En outre, dans cet exemple, la portion transversale 38 présente quatre logements 55 pour permettre de simplifier le positionnement de la plaquette 43 qui présente une forme symétrique. The plate 43 further comprises a means of indexing which is clearly visible in the example of FIG. 4. The indexing means here has two lugs 54 each extending radially outwardly from the outer periphery of FIG. the flat portion 44. The transverse portion 38 of the flange has, here, two housings 55 each receiving one of the lugs 54. The lugs are here arranged diametrically opposite on the periphery of the wafer 43. In addition, in this example , the part transverse 38 has four housings 55 to allow to simplify the positioning of the wafer 43 which has a symmetrical shape.
Les ergots 54 et les logements 55 présentent des formes respectivement complémentaires. Dans cet exemple, chaque ergot et chaque logement présentent une forme arrondie et notamment d'arc de cercle.  The lugs 54 and the housing 55 have complementary shapes respectively. In this example, each lug and each housing have a rounded shape including arcuate.
Par exemple, les logements 55 s'étendent dans un plan radial à partir du chambrage 50, c'est-à-dire que les ergots 54 s'étendent dans le même plan qu'au moins une partie de la portion plane 44. Ainsi le moyen d'indexage ne dépassa pas axialement de la portion plane 44 ce qui permet d'avoir une meilleur répartition d'harmoniques en bruit aéraulique.  For example, the housings 55 extend in a radial plane from the recess 50, that is to say that the lugs 54 extend in the same plane as at least a portion of the flat portion 44. the indexing means does not protrude axially from the flat portion 44 which allows for a better distribution of harmonics in aeraulic noise.
Comme bien visible sur les figures 2 et 4, la plaquette 43 comporte une fente 56 s'étendant radialement de manière à ce que la plaquette présente une forme ouverte. La fente 56 s'étend ainsi sur la portion plane 44 et sur le rebord 45. En l'occurrence, la fente s'étend à partir de l'ouverture 46 jusqu'à la périphérie externe de la plaquette 43. Par exemple, la fente s'étend dans une direction sensiblement radiale.  As clearly visible in Figures 2 and 4, the plate 43 has a slot 56 extending radially so that the wafer has an open shape. The slot 56 thus extends over the flat portion 44 and the rim 45. In this case, the slot extends from the opening 46 to the outer periphery of the wafer 43. For example, the slot extends in a substantially radial direction.
La présente invention trouve des applications en particulier dans le domaine des alternateurs ou machines réversibles mais elle pourrait également s'appliquer à tout type de machine tournante.  The present invention finds applications in particular in the field of alternators or reversible machines but it could also apply to any type of rotating machine.
Bien entendu, la description qui précède a été donnée à titre d'exemple uniquement et ne limite pas le domaine de la présente invention dont on ne sortirait pas en remplaçant les différents éléments par tous autres équivalents.  Of course, the foregoing description has been given by way of example only and does not limit the scope of the present invention which would not be overcome by replacing the various elements by any other equivalents.

Claims

REVENDICATIONS
1 . Machine électrique tournante, notamment pour véhicule automobile, la machine (10) comportant : 1. Rotating electrical machine, in particular for a motor vehicle, the machine (10) comprising:
- un rotor (12) et un stator (15) formant des parties actives s'étendant suivant un axe (X),  a rotor (12) and a stator (15) forming active portions extending along an axis (X),
- un carter (1 1 ) entourant les parties actives et comportant au moins un flasque (16), le flasque présentant une portion transversale (38) s'étendant sensiblement radialement et un nez (39) s'étendant en saillie à partir de la portion transversale,  - A casing (1 1) surrounding the active parts and having at least one flange (16), the flange having a transverse portion (38) extending substantially radially and a nose (39) projecting from the transverse portion,
- un roulement (18) logé radialement dans le nez du flasque, et a bearing (18) housed radially in the nose of the flange, and
- une plaquette (43) permettant un maintien axial du roulement la machine (10) étant caractérisée en ce que la plaquette (43) présente une portion plane (44) s'étendant radialement et un rebord (45) s'étendant en saillie axialement à partir de la portion plane pour venir en contact avec le roulement (18). - A plate (43) for axially maintaining the rolling machine (10) being characterized in that the plate (43) has a flat portion (44) extending radially and a flange (45) extending axially projecting from the flat portion to engage the bearing (18).
2. Machine selon la revendication précédente, caractérisée en ce que le rebord (45) est issu de matière avec la portion plane (44). 2. Machine according to the preceding claim, characterized in that the flange (45) is made of material with the flat portion (44).
3. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que le rebord (45) présente une forme de collerette. 3. Machine according to any one of the preceding claims, characterized in that the flange (45) has a flange shape.
4. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que le rebord (45) s'étend à partir d'une périphérie interne de la portion plane (44). 4. Machine according to any one of the preceding claims, characterized in that the flange (45) extends from an inner periphery of the flat portion (44).
5. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce qu'elle comporte, en outre, un arbre (13) s'étendant suivant l'axe (X), portant le rotor (12) et étant en contact avec une portion interne du roulement (18) et en ce qu'un diamètre interne du rebord (45) est supérieur à un diamètre externe de l'arbre (13). 5. Machine according to any one of the preceding claims, characterized in that it further comprises a shaft (13) extending along the axis (X), carrying the rotor (12) and being in contact with an inner portion of the bearing (18) and that an inner diameter of the flange (45) is greater than an outer diameter of the shaft (13).
6. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que le nez (39) comporte une portion latérale (41 ) s'étendant radialement et un fond (42) s'étendant transversalement à partir de la portion latérale et en ce qu'un diamètre externe du rebord (45) est inférieur à un diamètre interne de la portion latérale (41 ). 6. Machine according to any one of the preceding claims, characterized in that the nose (39) has a lateral portion (41) extending radially and a bottom (42) extending transversely from the lateral portion and an outer diameter of the flange (45) is smaller than an inner diameter of the lateral portion (41).
7. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que la plaquette (43) présente une fente (56) de manière à ce que la plaquette présente une forme ouverte. 7. Machine according to any one of the preceding claims, characterized in that the plate (43) has a slot (56) so that the wafer has an open form.
8. Machine selon la revendication précédente, caractérisée en ce que la portion plane (44) de la plaquette (43) est fixée à la portion transversale (38) du flasque (16) et en ce que la portion transversale du flasque comporte un chambrage (50) dans laquelle est insérée ladite portion plane. 8. Machine according to the preceding claim, characterized in that the flat portion (44) of the plate (43) is fixed to the transverse portion (38) of the flange (16) and in that the transverse portion of the flange comprises a chambering (50) in which is inserted said flat portion.
9. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que la portion plane (44) présente une périphérie externe circulaire. 9. Machine according to any one of the preceding claims, characterized in that the flat portion (44) has a circular outer periphery.
10. Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que la plaquette (43) comporte, en outre, un moyen d'indexage, le moyen d'indexage comportant notamment au moins un ergot (54) s'étendant en saillie radiale à partir de la périphérie externe de la portion plane (44). 10. Machine according to any one of the preceding claims, characterized in that the plate (43) further comprises an indexing means, the indexing means comprising in particular at least one lug (54) extending in radial projection from the outer periphery of the planar portion (44).
1 1 . Machine selon l'une quelconque des revendications précédentes, caractérisée en ce que le nez (39) comporte une portion latérale (41 ) s'étendant radialement, la paroi latérale (41 ) du nez (39) présentant une longueur axiale supérieure à celle du roulement (18) de manière à ce qu'un dispositif de réglage de la tension de la courroie du moteur thermique du véhicule soit couplé avec la machine électrique tournante. 1 1. Machine according to any one of the preceding claims, characterized in that the nose (39) has a radially extending lateral portion (41), the lateral wall (41) of the nose (39) having an axial length greater than that of the bearing (18) so that a device for adjusting the tension of the belt of the thermal engine of the vehicle is coupled with the rotating electrical machine.
EP18796071.1A 2017-11-08 2018-11-07 Rolling-bearing plate for a rotary electric machine Withdrawn EP3707806A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1760462A FR3073340B1 (en) 2017-11-08 2017-11-08 BEARING PLATE FOR ELECTRIC ROTATING MACHINE
PCT/EP2018/080496 WO2019092034A1 (en) 2017-11-08 2018-11-07 Rolling-bearing plate for a rotary electric machine

Publications (1)

Publication Number Publication Date
EP3707806A1 true EP3707806A1 (en) 2020-09-16

Family

ID=60627907

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18796071.1A Withdrawn EP3707806A1 (en) 2017-11-08 2018-11-07 Rolling-bearing plate for a rotary electric machine

Country Status (4)

Country Link
EP (1) EP3707806A1 (en)
CN (1) CN111264020A (en)
FR (1) FR3073340B1 (en)
WO (1) WO2019092034A1 (en)

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Publication number Priority date Publication date Assignee Title
AT130902B (en) 1928-12-20 1932-12-27 Aeg Union Elek Wien Tension pulley arrangement for mounting on electric motors.
US3469897A (en) * 1968-02-21 1969-09-30 Smith Corp A O Lock plate for fixed motor rotor bearing
DE2121612A1 (en) * 1971-05-03 1972-11-09 Siemens AG, 1000 Berlin u. 8000 München roller bearing
DE2939560C2 (en) * 1979-09-29 1983-08-25 Siemens AG, 1000 Berlin und 8000 München Fixed bearing with a roller bearing, especially for mounting the rotor shaft of a smaller electric motor
DE3014487A1 (en) * 1980-04-16 1981-10-22 Robert Bosch Gmbh, 7000 Stuttgart AC generator arrangement - uses single-sided roller bearing for rotor and for three-phase generator drive gear-wheel seating
FR2620876B3 (en) * 1987-09-22 1989-10-13 Equip Electr Moteur BALL BEARING FOR A ROTATING ELECTRIC MACHINE, AND PARTICULARLY FOR A MOTOR VEHICLE ALTERNATOR
FR2662871B1 (en) 1990-05-30 1992-08-07 Valeo Equip Electr Moteur ALTERNATOR, PARTICULARLY FOR MOTOR VEHICLES, AND ITS DEVICE FOR ADJUSTING THE BELT TENSION.
JP3480122B2 (en) * 1995-05-29 2003-12-15 株式会社デンソー Generator
FR2837995B1 (en) * 2002-03-27 2004-05-28 Valeo Equip Electr Moteur ALTERNATOR FOR MOTOR VEHICLE
JP4882888B2 (en) * 2007-06-27 2012-02-22 日本精工株式会社 Rolling bearing fixing device
JP2010226927A (en) * 2009-03-25 2010-10-07 Toshiba Corp Bearing device of rotary electric machine for railway vehicle
CN201526604U (en) * 2009-11-12 2010-07-14 重庆德马变频电机研发制造有限公司 Suspension and stopping device for bearings
FR2952982A1 (en) * 2009-11-26 2011-05-27 Alstom Transport Sa Roller bearing for traction engine of railway vehicle, has roller arranged inside cylindrical body of bearing case whose inner surface comprises female thread in which screw thread is housed
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Also Published As

Publication number Publication date
WO2019092034A1 (en) 2019-05-16
FR3073340A1 (en) 2019-05-10
CN111264020A (en) 2020-06-09
FR3073340B1 (en) 2020-10-23

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