EP0021891A1 - Face commutator for an electric machine, especially for automotive vehicles - Google Patents

Face commutator for an electric machine, especially for automotive vehicles Download PDF

Info

Publication number
EP0021891A1
EP0021891A1 EP19800400756 EP80400756A EP0021891A1 EP 0021891 A1 EP0021891 A1 EP 0021891A1 EP 19800400756 EP19800400756 EP 19800400756 EP 80400756 A EP80400756 A EP 80400756A EP 0021891 A1 EP0021891 A1 EP 0021891A1
Authority
EP
European Patent Office
Prior art keywords
projections
armature
insulating support
collector
collecting
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.)
Granted
Application number
EP19800400756
Other languages
German (de)
French (fr)
Other versions
EP0021891B1 (en
Inventor
Alexandre Larrauri
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.)
Ducellier et Cie
Original Assignee
Ducellier et Cie
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 Ducellier et Cie filed Critical Ducellier et Cie
Publication of EP0021891A1 publication Critical patent/EP0021891A1/en
Application granted granted Critical
Publication of EP0021891B1 publication Critical patent/EP0021891B1/en
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/04—Commutators
    • H01R39/06—Commutators other than with external cylindrical contact surface, e.g. flat commutators

Definitions

  • the present invention relates to a front collector for an armature of an electric machine fitted in particular to motor vehicles, a collector comprising a metallic means and collecting blades arranged radially on an insulating support, of molded material, by means of anchoring means provided on the posterior side of the collecting blades.
  • collectors of this type from a washer cut from a copper plate or strip.
  • the radial collecting blades are obtained by a stamping operation leaving a small thickness of material projecting between two consecutive blades, which thickness is eliminated during the subsequent finishing operations.
  • the anchoring means is obtained by raising the material, constituting the collecting blade, using a cutting tool.
  • This anchoring means is provided in the central part of each of the collecting blades, and is embedded in the insulating support during the molding operation of said support.
  • Radial guide projections, of triangular section are provided at the periphery of the insulating support to facilitate the introduction of the conductors of the armature into the slots provided for this purpose on the collector blades.
  • a metallic means of length shorter than the length of the insulating support inserted during the molding operation of said support serves as a means of fixing the collector on the armature shaft.
  • This embodiment has the drawback of having only one anchoring point for the collecting blades, hence a shaking of the collecting blades due to the successive machining operations which leads to detachment of said blades from the insulating support. during the operations of introducing, fixing and welding the conductors of the armature into the collecting blades.
  • a front collector is also known in which the collecting blades having an annular rim, on their inside and outside diameter, are anchored in the insulating support molded by diverging radial lips obtained using a tool having a V section.
  • This second embodiment which has the advantage of having a more effective anchoring than that obtained by the first embodiment, however has the disadvantage of very significantly reducing the space between collecting blades if one wishes to have satisfactory anchoring, hence the risk of having two blades touching each other and consequently a short circuit causing the destruction of the armature when the electric machine is powered up, if the fault could not be detected during control operations.
  • the purpose of the present invention is to remedy the aforementioned drawbacks and to this end relates to a front collector comprising a metal hub and collecting blades arranged radially on an insulating support, of molded material, by means of anchoring means provided on the rear face of the collecting blades, characterized in that at least three anchoring points are provided, per collecting blade, at least two of which are arranged towards each of the radial edges and inside the perimeter of said blade and at proximity to its peripheral part.
  • the insulating support, of molded material is of frustoconical shape and comprises towards its periphery radial projections of substantially rectangular shape and of constant section, the thickness of said projections being judiciously determined for, in cooperation with the two peripheral anchoring points embedded in said projections avoid any movement of the collecting blades under the effect of mechanical stresses due to machining and mounting on the armature of the collector and to thermal stresses due to the operation of the electric machine.
  • the substantially rectangular projections determine between them a channel in the extension of the housing notches of the conductors of the armature which channels have a dimension such that they leave remain between the conductors and the walls of the projections a space suitable and sufficient to receive an agent for immobilizing the conductors.
  • the conductor immobilizer is the armature impregnation varnish.
  • a recess is provided on the sides of the projections so as to form a cavity for housing the varnish for impregnating the armature so as to improve its resistance during overspeed tests.
  • the collector comprises a tubular metal hub with an annular flange folded towards the outside diameter of the tubular part at an angle similar to that of the frustoconical part of the insulating support.
  • the annular flange is produced at one end of the metal hub and is arranged towards the end of the insulating support opposite that of the collecting blades.
  • the annular flange is provided with recesses in which the material of the insulating support is housed.
  • the collecting blades 1 are obtained by a stamping tool leaving a small thickness of material 2 between two consecutive blades - (see Figures 1 and 5).
  • At least three anchoring points are provided per collecting blade, one of which 3 is provided in a known manner in the central part of the collecting blade (see FIGS. 1 and 2) and of which at least two 3a, 3b are arranged towards each of the radial edges and inside the perimeter of said blade and near its peripheral part.
  • the anchoring points are obtained in a known manner, by raising the material using a cutting tool.
  • the insulating support 4 of molded material, is of frustoconical shape (see FIGS. 2 and 3) and comprises around its periphery radial projections 5 (see FIGS. 2, 3 and 4) of substantially rectangular shape and of constant section (see FIG. 5 ).
  • the thickness of said projections is judiciously determined so, in cooperation with the two peripheral anchoring points 3a 3b embedded in said projections (see FIG. 5), to avoid any movement of the collecting blades under the effect of mechanical stresses due in particular to milling of the armature conductor receiving slots, the collector fitting forces on the armature shaft, and thermal stresses due to the operation of the starter.
  • the substantially rectangular projections 5 determine between them a channel 6 (see FIGS. 4, 5, 6 and 7) in the extension of the notches 7 (see FIG. 6) for housing the conductors 8 of the armature.
  • the channels 6 have a dimension such that they leave between the conductors 8 and the walls 5a and 5b of the projections 5 (see FIGS. 6 and 7), a space suitable and sufficient to receive an agent for immobilizing the conductors, such as example, the armature impregnation varnish.
  • a recess 9 is provided on the sides of the radial projections 5 so as to form a varnish housing cavity armature impregnation so as to improve its resistance during overspeed tests.
  • the tubular metal hub 10 (see FIG. 2) comprises an annular flange 10a (see FIGS. 2 and 4) folded towards the outside diameter of the tubular part at an angle similar to that of the frustoconical part 4a of the insulating support 4.
  • the annular flange 10a is produced at one end of the metal hub 10 and is arranged towards the end of the insulating support 4 opposite that of the collecting blades 1 (see FIG. 2).
  • the annular collar 10a is provided with recesses 10b (see FIGS. 2 and 4) in which the material of the insulating support 4 is housed.
  • annular flange 10a can be, if necessary, completely embedded in the insulating support 4, by simple shortening of the tubular part of the hub 10.
  • annular flange 10a can be located in an area of the tubular part, which area being between a certain distance from the rear face of the collecting blades and the end of the frustoconical part of the insulation.
  • manifold according to the invention avoids any movement of the collector blades, and particularly any tilting around the single point of attachment or any short circuit between two consecutive blades as in the collectors of the prior art.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

1. An end collector for the armature of an electrical machine, particularly for use in motor vehicles, the collector including a tubular metal hub (10) and collecting strips (1) disposed radially on a truncated cone shaped insulating support (4) of moulded material by the intermediary of anchoring means (3, 3a and 3b) provided on the rear face of each of the collecting strips (1), of which two (3a, 3b) are formed towards each of the radial edges within the perimeter of said strips and near to their peripheries, the insulating support (4) including radial projections (5) at its periphery, characterised in that the two anchoring means (3a, 3b) formed at the periphery of each of the collecting strips (1) are embedded respectively in each of the radial projections (5) of the insulating support, which are of substantially rectangular form and constant thickness so as to obtain an effective anchorage of the two means (3a, 3b).

Description

La présente invention concerne un collecteur frontal pour induit de machine électrique équipant notamment les véhicules automobiles, collecteur comportant un moyen métallique et des lames collectrices disposées radialement sur un support isolant, en matière moulée, par l'intermédiaire de moyens d'ancrage ménagés sur la face postérieure des lames collectrices.The present invention relates to a front collector for an armature of an electric machine fitted in particular to motor vehicles, a collector comprising a metallic means and collecting blades arranged radially on an insulating support, of molded material, by means of anchoring means provided on the posterior side of the collecting blades.

Il est connu d'obtenir des collecteurs de ce type à partir d'une rondelle découpée dans une plaque ou une bande de cuivre. Les lames collectrices radiales sont obtenues par une opération d'emboutissage laissant une faible épaisseur de matière en saillie entre deux lames consécutives, laquelle épaisseur est supprimée au cours des opérations ultérieures de finition.It is known to obtain collectors of this type from a washer cut from a copper plate or strip. The radial collecting blades are obtained by a stamping operation leaving a small thickness of material projecting between two consecutive blades, which thickness is eliminated during the subsequent finishing operations.

Le moyen d'ancrage est obtenu par relèvement de la matière, constituant la lame collectrice, à l'aide d'un outil coupant. Ce moyen d'ancrage est prévu dans la partie centrale de chacune des lames collectrices, et est noyé dans le support isolant lors de l'opération de moulage dudit support. Des saillies radiales de guidage, de section triangulaire sont prévue à la oériphérie du support isolant pour faciliter l'introduction des conducteurs de l'induit dans les fentes prévues à cet effet sur les lames collectrices.The anchoring means is obtained by raising the material, constituting the collecting blade, using a cutting tool. This anchoring means is provided in the central part of each of the collecting blades, and is embedded in the insulating support during the molding operation of said support. Radial guide projections, of triangular section are provided at the periphery of the insulating support to facilitate the introduction of the conductors of the armature into the slots provided for this purpose on the collector blades.

Un moyen métallique de longueur inférieure à la longueur du support isolant inséré lors de l'opération de moulage dudit support sert de moyen de fixation du collecteur sur l'arbre de l'induit.A metallic means of length shorter than the length of the insulating support inserted during the molding operation of said support serves as a means of fixing the collector on the armature shaft.

Ce mode de-réalisation présente l'inconvénient dé ne disposer que d'un seul point d'ancrage des lames collectrices, d'où un ébranlement des lames collectrices dû aux opérations successives d'usinage qui conduit à un décollement desdites lames du support isolant lors des opérations d'introductionde fixation et de soudure des conducteurs de l'induit dans les lames collectrices.This embodiment has the drawback of having only one anchoring point for the collecting blades, hence a shaking of the collecting blades due to the successive machining operations which leads to detachment of said blades from the insulating support. during the operations of introducing, fixing and welding the conductors of the armature into the collecting blades.

Le fait d'utiliser un moyen métallique de longueur inférieure à la longueur du support isolant provoque également sous l'effet de la pression d'emmanchement de l'arbre d'induit un ébranlement et parfois un décollement dudit moyeu de support isolant.The fact of using a metallic means of length less than the length of the insulating support also causes under the effect of the fitting pressure of the armature shaft a shaking and sometimes a detachment of said insulating support hub.

Tous ces défauts ne sont pas facilement décelables au cours des opérations successives d'usinage du collecteur et de fabrication de l'induit, mais apparaissent généralement lors des essais de survitesse de rotation de l'induit, d'où un accroissement très important des prix de revient dû au coût élevé de tels induits.All these defects are not easily detectable during the successive operations of machining the collector and manufacturing the armature, but generally appear during the tests of armature rotation overspeed, hence a very significant increase in cost prices due to the high cost of such armature.

On connait également un collecteur frontal dans lequel les lames collectrices comportant un rebord annulaire, sur leur diamètre intérieur et extérieur, sont ancrées dans le support isolant moulé par des lèvres divergentes radiales obtenues à l'aide d'un outil ayant une section en V.A front collector is also known in which the collecting blades having an annular rim, on their inside and outside diameter, are anchored in the insulating support molded by diverging radial lips obtained using a tool having a V section.

Ce deuxième mode de réalisation qui présente l'avantage d'avoir un ancrage plus efficace que celui obtenu par le premier mode de réalisation, présente toutefois l'inconvénient de diminuer de manière très importante l'espace entre lames collectrices si l'on veut avoir un ancrage satisfaisant, d'où un risque d'avoir deux lames qui se touchent et conséquemment un court circuit entrainant la destruction de l'induit lors de la mise sous tension de la machine électrique, si le défaut n'a pu être décelé lors des opérations de contrôle.This second embodiment which has the advantage of having a more effective anchoring than that obtained by the first embodiment, however has the disadvantage of very significantly reducing the space between collecting blades if one wishes to have satisfactory anchoring, hence the risk of having two blades touching each other and consequently a short circuit causing the destruction of the armature when the electric machine is powered up, if the fault could not be detected during control operations.

Le but de la présente invention est de remédier aux inconvénients précités et concerne a cet effet un collecteur frontal comportant un moyeu métallique et des lames collectrices disposées radialement sur un support isolant, en matière moulée, par l'intermédiaire de moyens d'ancrage ménagés sur la face postérieure des lames collectrices caractérisé en ce qu'il est prévu au-moins trois points d'ancrage, par lame collectrice, dont au moins deux sont ménagés vers chacun des bords radiaux et à l'intérieur du périmètre de ladite lame et à proximité de sa partie périphérique.The purpose of the present invention is to remedy the aforementioned drawbacks and to this end relates to a front collector comprising a metal hub and collecting blades arranged radially on an insulating support, of molded material, by means of anchoring means provided on the rear face of the collecting blades, characterized in that at least three anchoring points are provided, per collecting blade, at least two of which are arranged towards each of the radial edges and inside the perimeter of said blade and at proximity to its peripheral part.

Le support isolant, en matière moulée est de forme tronconique et comporte vers sa périphérie des saillies radiales de forme sensiblement rectangulaire et de section constante, l'épaisseur desdites saillies étant judicieusement déterminée pour, en coopération avec les deux points d'ancrage périphériques noyés dans lesdites saillies éviter tout mouvement des lames collectrices sous l'effet des contraintes mécaniques dues à l'usinage et au montage sur l'induit du collecteur et aux contraintes thermiques dues au fonctionnement de la machine électrique.The insulating support, of molded material is of frustoconical shape and comprises towards its periphery radial projections of substantially rectangular shape and of constant section, the thickness of said projections being judiciously determined for, in cooperation with the two peripheral anchoring points embedded in said projections avoid any movement of the collecting blades under the effect of mechanical stresses due to machining and mounting on the armature of the collector and to thermal stresses due to the operation of the electric machine.

Les saillies sensiblement rectangulaires déterminent entre elles un canal dans le prolongement des encoches de logement des conducteurs de l'induit lesquels canaux ont une dimension telle qu'ils laissent subsister entre les conducteurs et les parois des saillies un espace apte et suffisant à recevoir un agent d'immobilisation des conducteurs.The substantially rectangular projections determine between them a channel in the extension of the housing notches of the conductors of the armature which channels have a dimension such that they leave remain between the conductors and the walls of the projections a space suitable and sufficient to receive an agent for immobilizing the conductors.

L'agent d'immobilisation des conducteurs est le vernis d'imprégnation de l'induit.The conductor immobilizer is the armature impregnation varnish.

Il est prévu un évidement sur les flancs des saillies de manière à former une cavité de logement du vernis d'imprégnation de l'induit de façon à améliorer sa tenue lors des essais de survitesse.A recess is provided on the sides of the projections so as to form a cavity for housing the varnish for impregnating the armature so as to improve its resistance during overspeed tests.

Le collecteur comporte un moyeu métallique tubulaire à collerette annulaire rabattue vers le diamètre extérieur de la partie tubulaire suivant un angle semblable à celui de la partie tronconique du support isolant.The collector comprises a tubular metal hub with an annular flange folded towards the outside diameter of the tubular part at an angle similar to that of the frustoconical part of the insulating support.

La collerette annulaire est réalisée à l'une des extrémités du moyeυ métallique et est disposée vers l'extrémité du support isolant opposée à celle des lames collectrices.The annular flange is produced at one end of the metal hub and is arranged towards the end of the insulating support opposite that of the collecting blades.

La collerette annulaire est munie d'évidements dans lesquels vient se loger la matière du support isolant.The annular flange is provided with recesses in which the material of the insulating support is housed.

La description qui va suivre en regard des dessins annexés fera mieux comprendre comment l'invention peut être réalisée.

  • La figure 1 représente la rondelle de cuivre après l'opération d'emboutissage des lames collectrices et de relèvement des moyens d'ancrage.
  • La figure 2 représente une vue en coupe du collecteur après l'opération de moulage du support isolant.
  • La figure 3 est une vue de côté du collecteur après l'opération de moulage du support isolant.
  • La figure 4 est la vue arrière du collecteur au même stade de fabrication.
  • La figure 5 est une vue fragmentaire agrandie et en coupe de la zone des ancrages périphériques.
  • La figure 6 est une vue arrière fragmentaire agrandie du collecteur après l'opération de fraisage des encoches et introduction des conducteurs.
  • La figure 7 représente la même portion du collecteur vue de dessus et en coupe.
  • La figure 8 est une vue arrière fragmentaire agrandie du collecteur montrant les évidements sur les flancs des saillies rectangulaires.
The description which follows with reference to the appended drawings will make it easier to understand how the invention can be implemented.
  • Figure 1 shows the copper washer after the stamping operation of the collector blades and raising of the anchoring means.
  • 2 shows a sectional view of the collector after the operation of molding the insulating support.
  • Figure 3 is a side view of the manifold after the molding operation of the insulating support.
  • Figure 4 is the rear view of the manifold at the same stage of manufacture.
  • Figure 5 is an enlarged fragmentary view in section of the area of the peripheral anchors.
  • Figure 6 is an enlarged fragmentary rear view of the manifold after the milling operation of the notches and introduction of the conductors.
  • Figure 7 shows the same portion of the collector seen from above and in section.
  • Figure 8 is an enlarged fragmentary rear view of the manifold showing the recesses on the sides of the rectangular projections.

Selon un mode préféré de réalisation de l'invention, plus particulièrement adapté à la fabrication d'un collecteur de démarreur électrique, de moteur à combustion interne et après découpage d'une rondelle dans une plaque de cuivre, les lames collectrices 1 (voir - fig. 1) sont obtenues par un outil d'emboutissage laissant subsister une faible épaisseur de matière 2 entre deux lames consécutives - (voir figures 1 et 5).According to a preferred embodiment of the invention, more particularly suitable for the manufacture of an electric starter collector, of an internal combustion engine and after cutting a washer in a copper plate, the collecting blades 1 (see - Fig. 1) are obtained by a stamping tool leaving a small thickness of material 2 between two consecutive blades - (see Figures 1 and 5).

Conformément à l'invention, il est prévu au moins trois points d'ancrage par lame collectrice, dont l'un 3 est prévu de façon connue dans la partie centrale de la lame collectrice (voir figures 1 et 2) et dont au moins deux 3a, 3b sont ménagés vers chacun des bords radiaux et à l'intérieur du périmètre de ladite lame et à proximité de sa partie périphérique.According to the invention, at least three anchoring points are provided per collecting blade, one of which 3 is provided in a known manner in the central part of the collecting blade (see FIGS. 1 and 2) and of which at least two 3a, 3b are arranged towards each of the radial edges and inside the perimeter of said blade and near its peripheral part.

Les points d'ancrage sont obtenus de façon connue, par relèvement de la matière à l'aide d'un outil coupant.The anchoring points are obtained in a known manner, by raising the material using a cutting tool.

Le support isolante 4, en matière moulée, est de forme tronconique (voir figures 2 et 3) et comporte vers sa périphérie des saillies radiales 5 (voir figures 2,3 et 4) de forme sensiblement rectangulaire et de section constante (voir figure 5).The insulating support 4, of molded material, is of frustoconical shape (see FIGS. 2 and 3) and comprises around its periphery radial projections 5 (see FIGS. 2, 3 and 4) of substantially rectangular shape and of constant section (see FIG. 5 ).

L'épaisseur desdites saillies est judicieusement déterminée pour, en coopération avec les deux points d'ancrage périphériques 3a 3b noyés dans lesdites saillies (voir figure 5) éviter tout mouvement des lames collectrices sous l'effet des contraintes mécaniques dues en particulier au fraisage des encoches de réception des conducteurs de l'induit, aux efforts d'emmanchement du collecteur sur l'arbre de l'induit, et aux contraintes thermiques dues au fonctionnement du démarreur.The thickness of said projections is judiciously determined so, in cooperation with the two peripheral anchoring points 3a 3b embedded in said projections (see FIG. 5), to avoid any movement of the collecting blades under the effect of mechanical stresses due in particular to milling of the armature conductor receiving slots, the collector fitting forces on the armature shaft, and thermal stresses due to the operation of the starter.

Les saillies sensiblement rectangulaires 5 déterminent entre elles un canal 6 (voir figures 4, 5, 6 et 7) dans le prolongement des encoches 7 (voir figure 6) de logement des conducteurs 8 de l'induit. Les canaux 6 ont une dimension telle qu'ils laissent subsister entre les conducteurs 8 et les parois 5a et 5b des saillies 5 (voir figures 6 et 7), un espace apte et suffisant à recevoir un agent d'immobilisation des conducteurs, tel par exemple, le vernis d'imprégnation de l'induit.The substantially rectangular projections 5 determine between them a channel 6 (see FIGS. 4, 5, 6 and 7) in the extension of the notches 7 (see FIG. 6) for housing the conductors 8 of the armature. The channels 6 have a dimension such that they leave between the conductors 8 and the walls 5a and 5b of the projections 5 (see FIGS. 6 and 7), a space suitable and sufficient to receive an agent for immobilizing the conductors, such as example, the armature impregnation varnish.

Dans un second mode de réalisation des saillies radiales 5, (voir figure 8) un évidement 9 est prévue sur les flancs des saillies radiales 5 de manière à former une cavité de logement de vernis d'imprégnation de l'induit de façon à améliorer sa tenue lors des essais de survitesse.In a second embodiment of the radial projections 5 (see FIG. 8) a recess 9 is provided on the sides of the radial projections 5 so as to form a varnish housing cavity armature impregnation so as to improve its resistance during overspeed tests.

Le moyeu métallique tubulaire 10 (voir figure 2) comporte une collerette annulaire 10a (voir figures 2 et 4) rabattue vers le diamètre extérieur de la partie tubulaire suivant un angle semblable à celui de la partie tronconique 4a du support isolant 4.The tubular metal hub 10 (see FIG. 2) comprises an annular flange 10a (see FIGS. 2 and 4) folded towards the outside diameter of the tubular part at an angle similar to that of the frustoconical part 4a of the insulating support 4.

La collerette annulaire 10a est réalisée à l'une des extrémités du moyeu métallique 10 et est disposée vers l'extrémité du support isolant 4 opposée à celle des lames collectrices 1 (voir figure 2). La collerette annulaire 10a est munie d'évidements 10b (voir figures 2 et 4) dans lesquels vient se loger la matière du support isolant 4.The annular flange 10a is produced at one end of the metal hub 10 and is arranged towards the end of the insulating support 4 opposite that of the collecting blades 1 (see FIG. 2). The annular collar 10a is provided with recesses 10b (see FIGS. 2 and 4) in which the material of the insulating support 4 is housed.

Il est évident que la collerette annulaire 10a peut être, si nécés- saire, noyée complètement dans le support isolant 4, par simple raccourcissement de la partie tubulaire du moyeu 10.It is obvious that the annular flange 10a can be, if necessary, completely embedded in the insulating support 4, by simple shortening of the tubular part of the hub 10.

Il est également évident que la collerette annulaire 10a peut être située dans une zone de la partie tubulaire, laquelle zone étant comprise entre une certaine distance de la face postérieure des lames collectrices et l'extrémité de la partie tronconique de l'isolant.It is also obvious that the annular flange 10a can be located in an area of the tubular part, which area being between a certain distance from the rear face of the collecting blades and the end of the frustoconical part of the insulation.

On conçoit bien que le collecteur suivant l'invention évite tout mouvement des lames collectrices, et particulièrement tout basculement autour du point unique d'accrochage ou tout court circuit entre deux lames consécutives comme dans les collecteurs de l'art antérieur.It is well understood that the manifold according to the invention avoids any movement of the collector blades, and particularly any tilting around the single point of attachment or any short circuit between two consecutive blades as in the collectors of the prior art.

Claims (7)

1 - Collecteur frontal pour induit de machine électrique équipant notamment les véhicules automobiles, collecteur comportant un moyeu métallique et des lames collectrices disposées radialement sur un support isolant, en matière moulée, par l'intermédiaire de moyens d'ancrage ménagés sur la face postérieure des lames collectrices, caractérisé en ce qu'il est prévu au moins trois points d'ancrage (3, 3a,3b) par lame collectrice (1), dont au moins deux (3a,3b) sont ménagés vers chacun des bords radiaux et à l'intérieur du périmètre de ladite lame et à proximité de sa partie périphérique.1 - Front collector for the armature of an electric machine fitted in particular to motor vehicles, collector comprising a metal hub and collecting blades arranged radially on an insulating support, of molded material, by means of anchoring means provided on the rear face of the collecting blades, characterized in that at least three anchoring points (3, 3a, 3b) are provided for each collecting blade (1), at least two of which (3a, 3b) are arranged towards each of the radial edges and at inside the perimeter of said blade and near its peripheral part. 2 - Collecteur selon la revendication 1, caractérisé en ce que le support isolant (4), en matière moulée, est de forme tronconique et en ce qu'il comporte vers sa périphérie des saillies radiales (5) de forme sensiblement rectangulaire et de section constante, l'épaisseur desdites saillies étant judicieusement déterminée pour, en coopération avec les deux points d'ancrage périphériques (3a et 3b) noyés dans lesdites saillies, éviter tout mouvement des lames collectrices (1) sous l'effet des contraintes mécaniques dues à l'usinage et au montage sur l'induit dudit collecteur et aux contraintes thermiques dues au fonctionnement de la machine électrique.2 - Collector according to claim 1, characterized in that the insulating support (4), in molded material, is of frustoconical shape and in that it comprises towards its periphery radial projections (5) of substantially rectangular shape and section constant, the thickness of said projections being judiciously determined so as, in cooperation with the two peripheral anchoring points (3a and 3b) embedded in said projections, to avoid any movement of the collecting blades (1) under the effect of mechanical stresses due to machining and mounting on the armature of said collector and thermal stresses due to the operation of the electric machine. 3 - Collecteur selon la revendication 2, caractérisé en ce que les saillies (5) sensiblement rectangulaires déterminent entre elles un canal (6) dans le prolongement des encoches (7) de logement des conducteurs (8) de l'induit, lesquels canaux ont une dimension telle qu'ils laissent subsister entre-les conducteurs et les parois des saillies un espace apte et suffisant à recevoir un agent d'immobilisation des conducteurs.3 - Collector according to claim 2, characterized in that the substantially rectangular projections (5) determine between them a channel (6) in the extension of the notches (7) for housing the conductors (8) of the armature, which channels have a dimension such that they allow between the conductors and the walls of the projections a space suitable and sufficient to receive an agent for immobilizing the conductors. 4 - Collecteur selon la revendication 3, caractérisé en ce'que l'agent d'immobilisation des conducteurs est le vernis d'imprégnation de l'induit.4 - Collector according to claim 3, characterized in ce'que the immobilizer of the conductors is the varnish for impregnating the armature. 5 - Collecteur selon les revendications 3 et 4, caractérisé en ce qu'il est prévu un évidement (9) sur les flancs des saillies (5) de manière à former une cavité de logement du vernis d'imprégnation de l'induit de façon à améliorer sa tenue lors des essais de survitesse.5 - Collector according to claims 3 and 4, characterized in that there is provided a recess (9) on the sides of the projections (5) so as to form a housing cavity for the varnish impregnating the armature so to improve its behavior during overspeed tests. 6 - Collecteur selon les revendications 1 et 2, caractérisé en ce qu'il comporte un moyeu métallique tubulaire (10) à collerette annulaire (10a) rabattue vers le diamètre extérieur de la partie tubulaire suivant un angle semblable à celui de la partie tronconique du support isolant (4).6 - Collector according to claims 1 and 2, characterized in that it comprises a tubular metal hub (10) with an annular flange (10a) folded towards the outside diameter of the tubular part at an angle similar to that of the frustoconical part of the insulating support (4). 7 - Collecteur selon la revendication 6, caractérisé en ce que la collerette annulaire (10a) est réalisée à l'une des extrémités du moyeu métallique (10) et est disposée vers l'extrémité du support isolant (4) opposée à celle des lames collectrices (1).7 - manifold according to claim 6, characterized in that the annular collar (10a) is formed at one end of the metal hub (10) and is disposed towards the end of the insulating support (4) opposite to that of the blades collectors (1).
EP19800400756 1979-06-07 1980-05-29 Face commutator for an electric machine, especially for automotive vehicles Expired EP0021891B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7914521A FR2458920A1 (en) 1979-06-07 1979-06-07 FRONT COLLECTOR FOR ELECTRICAL MACHINE ARMATURE EQUIPPED WITH PARTICULAR VEHICLES
FR7914521 1979-06-07

Publications (2)

Publication Number Publication Date
EP0021891A1 true EP0021891A1 (en) 1981-01-07
EP0021891B1 EP0021891B1 (en) 1983-03-23

Family

ID=9226298

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800400756 Expired EP0021891B1 (en) 1979-06-07 1980-05-29 Face commutator for an electric machine, especially for automotive vehicles

Country Status (4)

Country Link
EP (1) EP0021891B1 (en)
DE (1) DE3062420D1 (en)
ES (1) ES251233Y (en)
FR (1) FR2458920A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5157299A (en) * 1990-09-07 1992-10-20 Kautt & Bux Kg Flat commutator and method for its production
US5912523A (en) * 1997-10-03 1999-06-15 Mccord Winn Textron Inc. Carbon commutator
US6359362B1 (en) 2000-07-31 2002-03-19 Mccord Winn Textron Inc. Planar commutator segment attachment method and assembly

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2127549A (en) * 1935-05-06 1938-08-23 Roy F Carty Commutator
US2176361A (en) * 1937-04-15 1939-10-17 Scruggs Loyd Radial commutator
US2791667A (en) * 1955-07-08 1957-05-07 Gen Electric Automatic brazing apparatus and method
GB1183192A (en) * 1966-07-29 1970-03-04 Lucas Industries Ltd Commutators
FR2261633A1 (en) * 1974-02-16 1975-09-12 Lucas Electrical Co Ltd
FR2363927A1 (en) * 1976-09-04 1978-03-31 Lucas Industries Ltd Connection of winding ends to commutator segments - using ultrasonic welding technique with very localised heating

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2127549A (en) * 1935-05-06 1938-08-23 Roy F Carty Commutator
US2176361A (en) * 1937-04-15 1939-10-17 Scruggs Loyd Radial commutator
US2791667A (en) * 1955-07-08 1957-05-07 Gen Electric Automatic brazing apparatus and method
GB1183192A (en) * 1966-07-29 1970-03-04 Lucas Industries Ltd Commutators
FR2261633A1 (en) * 1974-02-16 1975-09-12 Lucas Electrical Co Ltd
FR2363927A1 (en) * 1976-09-04 1978-03-31 Lucas Industries Ltd Connection of winding ends to commutator segments - using ultrasonic welding technique with very localised heating

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5157299A (en) * 1990-09-07 1992-10-20 Kautt & Bux Kg Flat commutator and method for its production
US5912523A (en) * 1997-10-03 1999-06-15 Mccord Winn Textron Inc. Carbon commutator
US6359362B1 (en) 2000-07-31 2002-03-19 Mccord Winn Textron Inc. Planar commutator segment attachment method and assembly
US6584673B2 (en) 2000-07-31 2003-07-01 Mccord Winn Textron Inc. Planar commutator segment attachment method and assembly

Also Published As

Publication number Publication date
ES251233Y (en) 1981-03-16
EP0021891B1 (en) 1983-03-23
FR2458920B1 (en) 1983-04-08
ES251233U (en) 1980-10-01
DE3062420D1 (en) 1983-04-28
FR2458920A1 (en) 1981-01-02

Similar Documents

Publication Publication Date Title
EP0186581B1 (en) Engine fan, especially for a motor vehicle, fixed to supporting arms integral with the car body
FR2735854A1 (en) DEVICE FOR ELECTRICALLY CONNECTING A MOTOR-FAN FOR A MOTOR VEHICLE HEAT EXCHANGER
EP2789076A1 (en) Device for guiding a set of electrical wires for electric motor rotor
FR2619880A1 (en) RELEASE STOP, IN PARTICULAR FOR MOTOR VEHICLES
FR2939570A1 (en) BRUSH DEVICE FOR MOTOR VEHICLE STARTER.
EP0240644A1 (en) Dynamo-electric machine, in particular an alternator for a motor vehicle
FR2641910A1 (en) Brushless alternator for vehicle
FR2856531A1 (en) DEVICE FOR FIXING PERMANENT MAGNETS WITHIN A CYLINDER HEAD OF AN ELECTRIC MOTOR INDUCER
FR2996076A1 (en) ELECTRIC MACHINE COLLECTOR AND INDUCTION MODULE AND ELECTRIC MACHINE COMPRISING SUCH A MODULE
EP0021891A1 (en) Face commutator for an electric machine, especially for automotive vehicles
EP0500442B1 (en) Fan rotor for rotating electric machines, particularly for alternators for cars
FR2564542A1 (en) CLUTCH, IN PARTICULAR FOR MOTOR VEHICLE.
WO1997043819A1 (en) Assembly of a collecting housing and a reducing motor connector
EP0739077B1 (en) Geared motor, in particular for driving at least one windscreen wiper for vehicles and method of assembling a brush holder and at least one electrical component in such a motor
FR2573584A1 (en) External rotor motor
EP0213981A1 (en) Alternating-current generator, in particular for automotive vehicles
FR2593976A2 (en) Rotor for dynamo-electric machine, in particular for motor vehicle alternator
EP0706255A1 (en) Rotating electric machine with commutator, in particular DC electric motor
FR2596929A1 (en) Dynamo-electric machine, in particular motor vehicle alternator
FR2618268A1 (en) Frontal commutator for a rotating electrical machine and method of manufacturing such a commutator
FR2533281A2 (en) Clutch release bearing, especially for an automobile vehicle and its method of assembly.
EP0021913A1 (en) Face commutator for an electric machine, especially for automotive vehicles
FR2532789A1 (en) Commutator for a rotating electrical machine, and its method of manufacture.
EP0728906A1 (en) Electric motor with zero current braking device
FR2640049A1 (en) Variable-reluctance electromagnetic sensor and method for assembling such a sensor

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): DE GB IT

17P Request for examination filed

Effective date: 19801216

ITF It: translation for a ep patent filed

Owner name: SOCIETA' ITALIANA BREVETTI S.P.A.

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Designated state(s): DE GB IT

REF Corresponds to:

Ref document number: 3062420

Country of ref document: DE

Date of ref document: 19830428

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19840525

Year of fee payment: 5

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Effective date: 19890529

GBPC Gb: european patent ceased through non-payment of renewal fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19900201

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT