EP0040163B1 - Method for manufacturing end commutators in electric motors - Google Patents

Method for manufacturing end commutators in electric motors Download PDF

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Publication number
EP0040163B1
EP0040163B1 EP81420069A EP81420069A EP0040163B1 EP 0040163 B1 EP0040163 B1 EP 0040163B1 EP 81420069 A EP81420069 A EP 81420069A EP 81420069 A EP81420069 A EP 81420069A EP 0040163 B1 EP0040163 B1 EP 0040163B1
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EP
European Patent Office
Prior art keywords
commutator
tooling
grooves
diameter
bore
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.)
Expired
Application number
EP81420069A
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German (de)
French (fr)
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EP0040163A1 (en
Inventor
Michel Coquillart
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Mavilor Systemes SA
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Mavilor Systemes SA
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Publication date
Application filed by Mavilor Systemes SA filed Critical Mavilor Systemes SA
Publication of EP0040163A1 publication Critical patent/EP0040163A1/en
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Publication of EP0040163B1 publication Critical patent/EP0040163B1/en
Expired legal-status Critical Current

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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
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/06—Manufacture of commutators
    • H01R43/08—Manufacture of commutators in which segments are not separated until after assembly
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49009—Dynamoelectric machine
    • Y10T29/49011—Commutator or slip ring assembly
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49799—Providing transitory integral holding or handling portion

Definitions

  • the invention relates to a method and means for manufacturing front collectors of electric motors, applicable in particular to collectors comprising insulation between the blades.
  • Cylindrical collectors of electric motors are known with mica or other insulation disposed in peripheral grooves, such as those which have been the subject of US Patent US 2,202,820. French Patent 458,088 and German Patent 381,719. None of these Patents provides a satisfactory solution. It is the same for flat collectors, or front, or disc-shaped for which the inter-lamella insulation has not yet been resolved effectively.
  • the invention as characterized in the claims solves the problem of producing in a rational and economical manner, front collectors with inter-lamella insulation in mica, with good precision and simplified tools.
  • the collector is cut by cutting, the various diameters are machined, a plurality of radial grooves of depth less than the thickness of the collector are executed on one face of the crown obtained to maintain between them the strips formed by the zones between the grooves, are introduced into these grooves insulating sheets of profile corresponding to the sectional profile of the collector, but of different dimensions to be held in the grooves when the force is passed through collector in the bore of low taper, of a tool, then in a second tool operating a diametric retreine, the metal thickness of the collector located between the radial grooves and the face of the collector opposite to the grooves is removed by machining. then places the collector thus prepared, between the two parts of a mold into which a coating resin is poured from the collector equipped with e its windings and an inner sleeve.
  • FIG. 2 is a perspective view of a mica strip of section corresponding substantially to the section of the collector shown according to FIG. 1.
  • Figure 3 is a partial perspective view of the manifold after execution of the radial grooves.
  • Figure 4 is a couple view illustrating a mica strip placed in a groove of the collector.
  • Figures 5, 6, 7 and 8 are schematic views illustrating the other phases of the method according to the invention.
  • the collectors are cut from a bar or a copper tube, by sawing off or otherwise, so as to obtain discs which are respectively machined to constitute a blank (1) of sectional profile corresponding to its definition or its characteristics of use.
  • the manifold has a sectional shape comprising two annular bearings (1a-1b) of different diameters, with in the bore, a groove (1c) of rectangular section, and externally, a groove (1d) of liaison.
  • Radial grooves (1e), the depth (a) of which is slightly less than the thickness (b) of the collector, as illustrated in FIG. 4, are executed with a saw mill or otherwise. that the strips (1f) formed between the grooves are held together.
  • Two sheets of mica or other insulating material (2) are cut according to a profile similar to that of the section of the collector, but of height (e) slightly less than or equal at the depth (a) of said grooves.
  • the faces (2a-2b-2c) project beyond the cross-section of the collector when the sheets are arranged in the grooves, while on the contrary, the faces (2d - 2e) are arranged in withdrawal.
  • the mica sheets (2) engaged and positioned in the grooves (1e) are firmly held in place by tightening the strips (1f).
  • the collector equipped with its mica sheets is placed at the entrance of a bore (3a) of low taper, formed in a tool) 3), whose upper diameter (d1) corresponds substantially to the diameter of the collector, while the lower diameter (d2) is smaller, as illustrated in FIG. 5.
  • the collector (1) is forced to descend to the level of the reduced lower diameter (d2) of the bore (3a), to allow by shrinking, the reduction of its diameter, and consequently, the tightening of the strips (1f) thus strongly tightening the sheets of mica (2).
  • the latter are also compressed at their upper part, by the mandrel (4), while the thin parts (1g) of the collector situated under the grooves (1e), deform under the force which they undergo, as illustrated in FIG. 5 .
  • a second tool (5), placed under the tool (3), has a bore (5a) whose diameter (d3) is equal to the diameter (d2) of the bore (3a).
  • the collector is completely and firmly engaged in the tool (5).
  • the tool (5) provided with its collector is then machined on a lathe, in order to produce for example, a groove (1h) on the bearing surface (1b) of the collector, and to erect the opposite face of the collector up to the 'removal of the deformed parts (1g).
  • a metal ring (6) for reinforcing the collector is for example, placed in the outer groove (1d) where it rests on the projecting face (2a) of the mica sheets, without any contact with the collector, therefore without electrical connection, as illustrated in FIG. 7.
  • the tool (5) provided with its collector is then centered above the bore (7a) of a third tool (7) which is in fact, the lower part of the mold in which the collector must be coated with resin, and which comprises for this purpose, a blind bore (7a) intended to receive the collector (1) ejected from the tool (5) by pushing the mandrel (4) or a similar member, as illustrated in FIG. 7.
  • the groove (1 h) can be made before the execution of the grooves (1e), for example, after cutting, or else be of different shape, or the collector may not have this groove (1 h) .
  • the reinforcing ring (6) can be removed or placed in the groove (1h), or put in place before or after positioning the collector in the lower part (7) of the mold.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)
  • Manufacture Of Motors, Generators (AREA)
  • Insulating Bodies (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Description

L'invention concerne un procédé et des moyens de fabrication de collecteurs frontaux de moteurs électriques, applicables notamment aux collecteurs comportant une isolation entre les lames.The invention relates to a method and means for manufacturing front collectors of electric motors, applicable in particular to collectors comprising insulation between the blades.

On connaît des collecteurs cylindriques de moteurs électriques avec une isolation en mica ou autre disposée dans des rainures périphériques, tels que ceux qui ont fait l'objet du Brevet américain US 2.202.820. du Brevet français 458.088 et du Brevet allemand 381.719. Aucun de ces Brevets n'apporte une solution satisfaisante. Il en est de même pour les collecteurs plats, ou frontaux, ou encore en forme de disque pour lesquels l'isolation inter-lamelles n'a pas encore été résolue de manière efficace.Cylindrical collectors of electric motors are known with mica or other insulation disposed in peripheral grooves, such as those which have been the subject of US Patent US 2,202,820. French Patent 458,088 and German Patent 381,719. None of these Patents provides a satisfactory solution. It is the same for flat collectors, or front, or disc-shaped for which the inter-lamella insulation has not yet been resolved effectively.

L'invention telle qu'elle est caractérisée dans les revendications résout le problème consistant à réaliser d'une manière rationnelle et économique, des collecteurs frontaux à isolation inter-lamelles en mica, avec une bonne précision et des outillages simplifiés.The invention as characterized in the claims solves the problem of producing in a rational and economical manner, front collectors with inter-lamella insulation in mica, with good precision and simplified tools.

Selon une caractéristique du procédé selon l'invention, on débite le collecteur par tronçonnage, on usine les différents diamètres nécessaires, on exécute sur une face de la couronne obtenue, une pluralité de rainures radiales de profondeur inférieur à l'épaisseur du collecteur, afin de maintenir entre elles les lamelles constituées par les zônes entre les rainures, on introduit dans ces rainures des feuilles isolantes de profil correspondant au profil en section du collecteur, mais de dimensions différentes pour être maintenures dans les rainures lorsqu'on fait traverser en force le collecteur dans l'alésage de faible conicité, d'un outillage, puis dans un deuxième outillage opérant une retreine diamétrale, on enléve par usinage l'épaisseur de métal de collecteur situé entre les rainures radiales et la face du collecteur opposée aux rainures, on place ensuit le collecteur ainsi préparé, entre les deux parties d'un moule dans lequel on coule une résine d'enrobage du collecteur équipé de ses enroulements et d'un douille intérieure.According to a characteristic of the method according to the invention, the collector is cut by cutting, the various diameters are machined, a plurality of radial grooves of depth less than the thickness of the collector are executed on one face of the crown obtained to maintain between them the strips formed by the zones between the grooves, are introduced into these grooves insulating sheets of profile corresponding to the sectional profile of the collector, but of different dimensions to be held in the grooves when the force is passed through collector in the bore of low taper, of a tool, then in a second tool operating a diametric retreine, the metal thickness of the collector located between the radial grooves and the face of the collector opposite to the grooves is removed by machining. then places the collector thus prepared, between the two parts of a mold into which a coating resin is poured from the collector equipped with e its windings and an inner sleeve.

Ces caractéristiques et d'autres ressortiront de la description qui suit.These and other characteristics will become apparent from the description which follows.

Pour fixer l'objet de l'invention, sans toutefois le limiter, aux figures des dessins annexés:

  • La figure 1 est une vue en perspective d'un collecteur ébauché.
To fix the subject of the invention, without however limiting it, to the figures of the appended drawings:
  • Figure 1 is a perspective view of a rough collector.

La figure 2 est une vue en perspective d'une lamelle de mica de section correspondant sensiblement à la section du collecteur représenté selon la figure 1.FIG. 2 is a perspective view of a mica strip of section corresponding substantially to the section of the collector shown according to FIG. 1.

La figure 3 est une vue partielle, en perspective, du collecteur après exécution des rainures radiales.Figure 3 is a partial perspective view of the manifold after execution of the radial grooves.

La figure 4 est une vue en couple illustrant une lamelle de mica mise en place dans une rainure du collecteur.Figure 4 is a couple view illustrating a mica strip placed in a groove of the collector.

Les figures 5, 6, 7 et 8 sont des vues à caractère schématique illustrant les autres phases du procédé selon l'invention.Figures 5, 6, 7 and 8 are schematic views illustrating the other phases of the method according to the invention.

Selon la présente invention et dans l'exemple nullement limitatif illustré aux dessins, les collecteurs sont débités à partir d'un barreau ou d'un tube de cuivre, par trononnage à la scie ou autrement, de manière à obtenir des disques qui sont respectivement usinés pour constituer une ébauche (1) de profil en section correspondant à sa définition ou ses caractéristiques d'emploi.According to the present invention and in the nonlimiting example illustrated in the drawings, the collectors are cut from a bar or a copper tube, by sawing off or otherwise, so as to obtain discs which are respectively machined to constitute a blank (1) of sectional profile corresponding to its definition or its characteristics of use.

Dans l'exemple illustré, le collecteur présente une forme en section comprenant deux portées annulaires (1a-1b) de diamètres différents, avec dans l'alésage, une gorge (1c) de section rectangulaire, et extérieurement, une gorge (1d) de liaison.In the example illustrated, the manifold has a sectional shape comprising two annular bearings (1a-1b) of different diameters, with in the bore, a groove (1c) of rectangular section, and externally, a groove (1d) of liaison.

Avec une fraise-scie ou autrement, on exécute à partir de la portée (1b), des rainures radiales (1e) dont la profondeur (a) est légèrement inférieure à l'épaisseur (b) du collecteur comme illustré figure 4, de manière à ce que les lamelles (1f) formées entre les rainures, soient maintenures entre elles.Radial grooves (1e), the depth (a) of which is slightly less than the thickness (b) of the collector, as illustrated in FIG. 4, are executed with a saw mill or otherwise. that the strips (1f) formed between the grooves are held together.

Deux feuilles de mica ou autre matière isolante (2), d'épaisseur sensiblement égale à la largeur des rainures (1e), sont découpées suivant un profil semblable à celui de la section du collecteur, mais de hauter (e) légèrement inférieure ou égale à la profondeur (a) desdites rainures. Les faces (2a-2b-2c) débordent par rapport à la section du collecteur lorsque les feuilles sont disposées dans les rainures, tandis qu'au contraire, les faces (2d-2e) sont disposées en retrait.Two sheets of mica or other insulating material (2), of thickness substantially equal to the width of the grooves (1e), are cut according to a profile similar to that of the section of the collector, but of height (e) slightly less than or equal at the depth (a) of said grooves. The faces (2a-2b-2c) project beyond the cross-section of the collector when the sheets are arranged in the grooves, while on the contrary, the faces (2d - 2e) are arranged in withdrawal.

Les feuilles de mica (2) engagées et positionnées dans les rainures (1e), sont fermement maintenures en resserrant les lamelles (1f). A cet effet, le collecteur équipé de ses feuilles de mica, est placé à l'entrée d'un alésage (3a) de faible conicité, formé dans un outillage )3), dont le diamètre supérieur (d1) correspond sensiblement au diamètre du collecteur, tandis que le diamètre inférieur (d2) lui est inférieur, comme illustré figure 5. A l'aide d'un mandrin mobile (4) ou organe équivalent, on force le collecteur (1) à descendre au niveau du diamètre inférieur réduit (d2) de l'alésage (3a), pour permettre par rétreinte, la diminution de son diamètre, et par suite, le resserrement des lamelles (1f) venant ainsi serrer fortement les feuilles de mica (2). Ces dernières sont également comprimées à leur partie supérieure, par le mandrin (4), tandis que les parties minces (1g) du collecteur situées sous les rainures (1e), se déforment sous l'effort qu'elles subissent, comme illustré figure 5.The mica sheets (2) engaged and positioned in the grooves (1e) are firmly held in place by tightening the strips (1f). For this purpose, the collector equipped with its mica sheets, is placed at the entrance of a bore (3a) of low taper, formed in a tool) 3), whose upper diameter (d1) corresponds substantially to the diameter of the collector, while the lower diameter (d2) is smaller, as illustrated in FIG. 5. With the aid of a movable mandrel (4) or equivalent member, the collector (1) is forced to descend to the level of the reduced lower diameter (d2) of the bore (3a), to allow by shrinking, the reduction of its diameter, and consequently, the tightening of the strips (1f) thus strongly tightening the sheets of mica (2). The latter are also compressed at their upper part, by the mandrel (4), while the thin parts (1g) of the collector situated under the grooves (1e), deform under the force which they undergo, as illustrated in FIG. 5 .

Un deuxième outillage (5), placé sous l'outillage (3), présente un alésage (5a) dont le diamètre (d3) est égale au diamètre (d2) de l'alésage (3a). En fin de course du mandrin (4), le collecteur est complètement et fermement engagé dans l'outillage (5).A second tool (5), placed under the tool (3), has a bore (5a) whose diameter (d3) is equal to the diameter (d2) of the bore (3a). At the end of the mandrel stroke (4), the collector is completely and firmly engaged in the tool (5).

L'outillage (5) muni de son collecteur, est ensuite usiné sur un tour, afin de réaliser par exemple, une gorge (1h) sur la portée (1b) du collecteur, et de dresser la face opposée du collecteur jusqu'à l'enlèvement des parties (1g) déformées.The tool (5) provided with its collector, is then machined on a lathe, in order to produce for example, a groove (1h) on the bearing surface (1b) of the collector, and to erect the opposite face of the collector up to the 'removal of the deformed parts (1g).

Cette opération d'usinage terminée, un anneau métallique (6) de renforcement du collecteur, est par exemple, mis en place dans la gorge extérieure (1d) où il repose sur la face débordante (2a) des feuilles de mica, sans aucun contact avec le collecteur, donc sans liaison électrique, comme illustré figure 7.Once this machining operation is complete, a metal ring (6) for reinforcing the collector is for example, placed in the outer groove (1d) where it rests on the projecting face (2a) of the mica sheets, without any contact with the collector, therefore without electrical connection, as illustrated in FIG. 7.

L'outillage (5) muni de son collecteur, est ensuite centré au-dessus de l'alsége (7a) d'un troisième outillage (7) qui est en fait, la partie inférieure du moule dans lequel le collecteur doit être enrobé de résine, et qui comprend à cet effet, un alésage borgne (7a) destiné à recevoir le collecteur (1) éjecté de l'outillage (5) par poussée du mandrin (4) ou d'un organe similaire, comme illustré figure 7.The tool (5) provided with its collector, is then centered above the bore (7a) of a third tool (7) which is in fact, the lower part of the mold in which the collector must be coated with resin, and which comprises for this purpose, a blind bore (7a) intended to receive the collector (1) ejected from the tool (5) by pushing the mandrel (4) or a similar member, as illustrated in FIG. 7.

Il ne reste alors plus qu'à positionner la partie supérieure (8) du moule avec la douille intérieure (9) du collecteur, et à couler la résine (10) destinée à former le centre du rotor (figure 8), dont la périphérie équipée de façon connue, de ses enroulements reliés aux lamelles du collecteur, est ensuite formée également par enrobage de résine, dans un autre moule.It then only remains to position the upper part (8) of the mold with the inner sleeve (9) of the collector, and to pour the resin (10) intended to form the center of the rotor (FIG. 8), the periphery of which equipped in a known manner, with its windings connected to the collector lamellae, is then also formed by coating with resin, in another mold.

Bien entendu, de nombreuses variantes peuvent être introduites dans le cadre de l'invention. Par exemple, la gorge (1 h) peut être réalisée avant l'exécution des rainures (1e), par exemple, après le tronçonnage, ou bien être de forme différente, ou encore le collecteur peut ne pas présenter cette gorge (1 h). De même, l'anneau de renforcement (6) peut être supprimé ou disposé dans la gorge (1h), ou mis en place avant ou après positionnement du collecteur dans la partie inférieure (7) du moule.Of course, many variants can be introduced within the scope of the invention. For example, the groove (1 h) can be made before the execution of the grooves (1e), for example, after cutting, or else be of different shape, or the collector may not have this groove (1 h) . Likewise, the reinforcing ring (6) can be removed or placed in the groove (1h), or put in place before or after positioning the collector in the lower part (7) of the mold.

Claims (6)

1. Method of manufacture of vertical commutators of electrical motors, of.the type comprising an insulation between the segments, characterized in that the method includes the following steps: the commutator (1) is paid off by cutting off; the various necessary diameters are machined; a plurality of radical grooves (1e) is provided on a face of the crown obtained by means of a milling cutter saw, the depth (a) of the grooves being less than the thickness (b) of the commutator, in order to hold between them the small segments (1f) formed by the regions between the grooves; insulating sheets (2) having a contour corresponding to the sectional contour of the commutator, however with different dimensions, are inserted within these grooves to be maintained therein when the commutator is forced through the slightly tapering bore (3a) of a tooling (3) and thereafter through a second tooling (5) effecting a diametral constriction of the commutator, the thickness of metal (1g) of the commutator, situated between the radial grooves (1e) and the face of the commutator opposite the grooves is removed by machining; the commutator thus prepared is then placed between the two parts (7-8) of a mold in which a resin (10) is poured for coating the commutator equipped with its coilings and with an inside socket (9).
2. Method as claimed in claim 1, characterized in that the insulating sheets (2) are cut out along such a contour that some portions (2a, 2b, 2c) of the lateral ridges will be projecting from the sectional contour of the commutator, while the top ridge thereof and other portions (2d, 2e) of one of said lateral ridges are recessed when said sheets (2) are placed within the grooves (1e).
3. Method as claimed in claim 1, characterized in that the commutator (1) equipped with its insulating sheets (2) is placed at the inlet of the bore (3a) of the tooling (3), the upper diameter (d1) of which corresponds nearly to the diameter of the commutator, which is urged by a chuck (4) in the direction of the lower diameter (d2) of the bore which has a smaller diameter than the diameter (dl), in order to tighten the small segments (1f) of the commutator against the insulating sheets (2) by diametral constriction.
4. Method as claimed in claim 3, characterized in that on completion of the stroke of the chuck (4), the commutator is entirely engaged and maintained within the second tooling (5) located beneath the tooling (3), the bore of this second tooling having a diameter (d3) which is equal to the diameter (d2) of the tooling (3), the tooling (5) and the commutator (1) being then positioned on a machining lathe in order to trim the face of the commutator (1) located beneath the grooves (1e) up to the removal of the metal thicknesses (1g), and in order to perform other machining steps such as a recessed portion (1 h) on the side of the grooves (1e).
5. Method as claimed in claim 4, characterized in that in the above embodiment of the tooling (5) and of the commutator (1), this tooling and this commutator are centered above the bore (7a) of the tooling (7) forming the lower part of a mould, the commutator being discharged from the tooling (5) by the chuck (4).
6. Method as claimed in claim 5, characterized in that the commutator (1), before or after the positioning thereof within the tooling (7), receives a reinforcement ring (6) disposed in abutment on one of the portions of the projecting ridges (2a) of the insulating sheets (2), without any electrical contact with the commutator.
EP81420069A 1980-05-09 1981-05-07 Method for manufacturing end commutators in electric motors Expired EP0040163B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8011151A FR2482375A1 (en) 1980-05-09 1980-05-09 METHOD AND MEANS FOR MANUFACTURING FRONT COLLECTORS OF ELECTRIC MOTORS
FR8011151 1980-05-09

Publications (2)

Publication Number Publication Date
EP0040163A1 EP0040163A1 (en) 1981-11-18
EP0040163B1 true EP0040163B1 (en) 1985-02-13

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EP81420069A Expired EP0040163B1 (en) 1980-05-09 1981-05-07 Method for manufacturing end commutators in electric motors

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US (1) US4439913A (en)
EP (1) EP0040163B1 (en)
JP (1) JPS573556A (en)
CA (1) CA1171254A (en)
DE (2) DE40163T1 (en)
ES (1) ES502070A0 (en)
FR (1) FR2482375A1 (en)
SU (1) SU1168105A3 (en)

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US6652360B2 (en) * 2001-05-24 2003-11-25 Cutsforth Products, Inc. Method and apparatus for creating a groove in a collector ring of an electrical device
US8424187B2 (en) 2005-04-22 2013-04-23 Infranor Holding Sa Method of terminating the stator winding of an electric motor
DE102005028791A1 (en) * 2005-06-16 2006-12-28 Kautt & Bux Gmbh Plan commutator and method for producing a flat commutator
CN101488635B (en) * 2009-02-19 2010-10-20 宁波华瑞电器有限公司 Commutator production process
CN101488636B (en) * 2009-02-19 2010-09-29 宁波华瑞电器有限公司 Commutator production process
US10537863B2 (en) 2015-12-31 2020-01-21 United States Gypsum Company Constrictor valve with webbing, cementitious slurry mixing and dispensing assembly, and method for making cementitious product
CN113783065A (en) * 2021-09-01 2021-12-10 梁瑜 Automatic insert machine of commutator
CN117013337B (en) * 2023-05-22 2024-03-22 中核检修有限公司 Motor commutator detects equipment

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Publication number Priority date Publication date Assignee Title
FR458088A (en) * 1912-05-21 1913-10-02 The United States Light & Heating Company Improvements to switches
DE381719C (en) * 1920-04-24 1923-09-24 Toledo Standard Commutator Com Commuter with metallic carrying case for electrical machines
NL48368C (en) * 1933-08-22
FR1011902A (en) * 1949-04-15 1952-07-01 Mach Electrostatiques Sa Des Collector or the like for very high voltage machine
US3293694A (en) * 1962-03-05 1966-12-27 Dayton Prec Corp Mold apparatus for making subflush commutators
FR2171540A6 (en) * 1972-02-04 1973-09-21 Sitem
GB1446595A (en) * 1973-01-25 1976-08-18 Lucas Electrical Ltd Method of manufacturing face commutators for dynamo electric machines

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CA1171254A (en) 1984-07-24
DE40163T1 (en) 1983-03-17
SU1168105A3 (en) 1985-07-15
ES8203168A1 (en) 1982-02-16
DE3168867D1 (en) 1985-03-28
JPS573556A (en) 1982-01-09
US4439913A (en) 1984-04-03
FR2482375B1 (en) 1983-04-29
ES502070A0 (en) 1982-02-16
EP0040163A1 (en) 1981-11-18
FR2482375A1 (en) 1981-11-13
JPH0350498B2 (en) 1991-08-01

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