EP0644629B1 - Kollektor für einen Wechselstromgenerator, insbesondere für ein Kraftfahrzeug - Google Patents

Kollektor für einen Wechselstromgenerator, insbesondere für ein Kraftfahrzeug Download PDF

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Publication number
EP0644629B1
EP0644629B1 EP94402049A EP94402049A EP0644629B1 EP 0644629 B1 EP0644629 B1 EP 0644629B1 EP 94402049 A EP94402049 A EP 94402049A EP 94402049 A EP94402049 A EP 94402049A EP 0644629 B1 EP0644629 B1 EP 0644629B1
Authority
EP
European Patent Office
Prior art keywords
alternator
notches
commutator
extension
notch
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 - Lifetime
Application number
EP94402049A
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English (en)
French (fr)
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EP0644629A1 (de
Inventor
Patrick Rondier
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 EP0644629A1 publication Critical patent/EP0644629A1/de
Application granted granted Critical
Publication of EP0644629B1 publication Critical patent/EP0644629B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H01R39/00—Rotary current collectors, distributors or interrupters
    • H01R39/02—Details for dynamo electric machines
    • H01R39/14—Fastenings of commutators or slip-rings to shafts

Definitions

  • the present invention relates generally to alternators in particular for motor vehicles.
  • the slip rings are produced directly on an overhanging part of the alternator shaft.
  • Another known technique consists in making the collector in the form of a separate part, for example by overmolding, and then in bringing this part to the alternator shaft, for example by force fitting.
  • Such a known attached collector is produced by overmolding of insulating material on electrically conductive elements, and comprises a generally cylindrical body comprising at its outer surface two slip rings, and elements for connecting the rings with the ends of the wires of a winding.
  • the collector comprises, on the side of the body on which the fitting force is to be exerted, an extension of the insulating material of the overmolding over a short distance, in order to ensure satisfactory wedging of the adjacent ring. in axial direction.
  • the invention aims in the first place to overcome this drawback.
  • the present invention therefore also proposes to ensure that a collector to be fitted on the alternator shaft and having a general symmetry of revolution over 180 ° can adopt a particular orientation among the two possible orientations, in order to ensure a matching of the connection between the two ends of the coil wires and the two collector rings to minimize the above-mentioned disturbances.
  • the present invention relates to a manifold intended to be force fitted on an alternator shaft, in particular of a motor vehicle, of the type produced by overmolding of insulating material on electrically conductive elements, and comprising a generally cylindrical body comprising on its outer surface two slip rings connected to two connection elements with the ends of the wires of a winding, the body comprising a bore for said shaft and an extension of insulating material beyond one of the two rings, on a side where a force of fitting must be exerted, characterized in that at least one notch is formed in said extension, throughout its axial thickness, and reveals an edge of the adjacent ring, so that the fitting effort can be exerted directly on said ring through said notch.
  • the invention also provides an alternator in particular for a motor vehicle, characterized in that it comprises on a projecting shaft a manifold as defined above.
  • FIG. 1 there is shown a part forming a collector for an alternator, at an intermediate stage of its manufacture.
  • the part is produced by overmolding of plastic material, preferably thermosetting, on conductive parts, for example copper, intended to form firstly two cylindrical contact rings with brushes, secondly two elements connection with two ends of a rotor winding of the alternator, and thirdly two electrical connection elements between the two rings and the two connection elements.
  • plastic material preferably thermosetting
  • conductive parts for example copper
  • the cylindrical rings are initially made up of a single hollow copper cylinder 10 which, at the end of the production of the part, is cut circularly over its entire thickness in its median region to form the two rings 10a, 10b electrically isolated from each other ( Figure 9).
  • connection elements respectively 14a, 14b, comprise two facing tabs 15, 15 which define between them a flared central channel 17 and which are connected together by a part 15 'in the form of a truncated cone sector , defining the bottom of the channel. This channel is intended to receive one end of the winding.
  • the associated connecting element, respectively 12a, 12b, extends radially inwards from the narrowest side of the part 15.
  • Each tab 15 has, in the region of the bottom of the channel and on its edge turned radially inwards, a notch in this case semi-circular 16.
  • each tab 15 has on its inner face a generally rounded boss 151, preferably made by stamping, for purposes explained below.
  • FIG. 9 illustrates the end of a winding wire FB which has been placed in the connection element 14a, the part 1 occupying in this case an angular position such that the two connection elements 14a, 14b are vertically aligned.
  • the wire is bent over 180 ° and its free, descending end is engaged in the channel defined between the legs 15, while its elbow is housed in one of the notches 16.
  • a crimping or pinching is carried out by bringing together with a tool the two tabs 15, which pinch the free end portion of the wire, this step being followed by welding, for example electric.
  • welding for example electric.
  • connection element such as 14a has many advantages.
  • the flared shape of the channel delimited by the lugs 15 and the bottom 15 ′ exerts a guiding effect during the introduction of the free end of the wire.
  • This flared shape also allows, because the channel 17 has its greatest width at the connection of the element 14a or 14b with the rest of the metal part, to limit the necking phenomena when folding the legs 15 to exert the pinch.
  • the notch 16 which receives the bent region of the wire ensures stabilization of the wire in the position illustrated in FIG. 9, in particular preventing it from disengaging from the channel by its open side.
  • tabs 15 ensure a firm but not sharp pinching of the wire, to ensure good mechanical strength before the welding step.
  • the connecting elements 12a, 12b each comprise a part in the form of a cylinder portion, respectively 121a, 121b, welded on the inner face of the part 10 intended to form the rings, a first generally straight intermediate part, respectively 122a, 122b , the section of which is U-shaped at least over a substantial part of its length (see in particular FIG. 3, right part, and FIG. 7), and offset radially inwards relative to the respective associated part 121a, 121b, and a second intermediate part, of flat section, curved at an angle of approximately 90 °, respectively 123a, 123b, the radially oriented end of which extends into the element respective connection 14a, 14b.
  • the profile variations of the parts 121a-123a and 121b-123b take place gradually.
  • the parts 121a, 121b are welded to the part 10 respectively in its close region and in its region remote from the connecting elements 12a, 12b, so that after the aforementioned cutting, the connecting element 14a is only connected to the ring 10a, and that the connection element 14b is only connected to the ring 10b.
  • the U-shaped section of the straight intermediate parts makes it possible to increase their rigidity, in order to minimize any risk of inadvertent positioning deviation during the overmolding step, and in particular to avoid any risk of short circuit between the part of the cylinder 10 which will become the inner ring 10a and the adjacent intermediate part 122b.
  • each curved intermediate portion 123a, 123b comprises, in the vicinity of the respective connection element 14a, 14b, a wider region, respectively 124a, 124b, defining two lateral anchoring tabs 1241 and in which is formed a circular through hole 1242.
  • This hole is intended to cooperate with arrangements (fixed or mobile) of the mold so as to precisely position the connection elements 14a, 14b during the overmolding step.
  • a part 20 of generally cylindrical shape which extends inside the copper cylinder 10 completely covering its inner face as well as the conductive plates 121a, 121b and the sections of the intermediate parts 122a, 122b located at the interior of said cylinder.
  • This cylinder 20 is extended, in the direction of the connection elements 14a, 14b by another cylindrical part 22, the external surface of which comes flush with the external surface of the copper cylinder 10.
  • the parts 20, 22 define a central cylindrical bore 24 provided over its entire length with two grooves 26, 26 'of generally rectangular section, diametrically opposite and occupying the same angular positions, relative to the axis of the part, as the elements connection 14a, 14b.
  • This grooved bore is intended to receive a shaft, of complementary shape, from the alternator, on which the part 1 is force fitted.
  • the cylindrical part 20 is extended by a small flange 28 with bevelled outer and inner edges, respectively 28a and 28b. Between the bevelled outer edge 28a and the copper cylinder 10, the part 28 has a cylindrical surface slightly set back from the exterior surface of said cylinder 10.
  • this part 28 are formed three notches 30, 30 'and 30' 'whose depth is equal to the length of the part 28 in the axial direction, that is to say that the bottom of these notches reveals the edge of the copper cylinder.
  • One of these three notches 30 is aligned with the lower groove 26, while the other two, 30 'and 30' ', are angularly offset in this case by 120 ° on either side of the notch 30 .
  • the notches 30, 30 ', 30'' have a dual role.
  • the press fit of part 1 on the shaft of the alternator is carried out, for example automatically, by exerting a very large axial force on the part 1 on the side of the part 28.
  • notches 30, 30 ', 30' ' make it possible to provide a polarization as for the angular positioning of the part 1 on the alternator before its fitting.
  • the notches 30, 30 ', 30' ' allow the pairing of these connections to be carried out, the correct angular position of the part 1, among its two possible positions offset by 180 °, being determined for example by means of one or more probes associated with robotic assembly equipment, or even visually during manual operations.
  • the part 1 after overmolding further comprises two plastic branches 32a, 32b in which the connecting conductive parts 122a, 123a and 122b, 123b are entirely embedded, respectively, and a ring-shaped part 34 of axis coinciding with that of the cylindrical parts 10, 20, 22, connected to these parts by said branches and situated at the level of the connection elements 14a, 14b.
  • each branch 32a, 32b comprises a rectilinear section, respectively 321a, 321b, and a section curved over 90 °, respectively 322a, 322b, conforming to the shape of the curved intermediate parts 123a, 123b made of conductive material.
  • the branches 32a, 32b are connected radially and in positions diametrically opposite the ring 34, at the level of the connection elements 14a, 14b.
  • each branch 32a, 32b in the transition region between its rectilinear section and its curved section, exhibits an outward offset noted respectively 323a, 323b.
  • each straight section 321a, 321b is located in the extension, in an axial direction, of the inner face of a groove 26, 26 'of the bore 24, while the outer face of each straight section has a profile in the shape of an arc of a circle and is located in the extension, in an axial direction, of the face part 22.
  • the ring 34 comprises, in two diametrically opposite positions and offset by 90 ° relative to the connection elements 14a, 14b, two thickeners 341 directed outwards, and in the external surface of which two slightly concave recesses 342 are formed respectively.
  • Two other extra thicknesses 343, also directed outwards, are formed in the ring 34 at the connection elements 14a, 14b, so as to partially trap the anchoring lugs 1241.
  • these extra thicknesses 343 are also formed respectively two recesses 344 allowing the circular holes 1242 to be left free.
  • the production of the ring 34 during the overmolding step makes it possible to stiffen the part 1 in the region of the connection elements 14a, 14b, ensuring that their mutual distance in the radial direction is well determined. Indeed, the presence of the alternator fan not far from these elements 14a, 14b after fitting the part requires positioning these elements precisely in the radial direction. Furthermore, the ring 34 makes it possible to guarantee the absence of any contact between the elements 14a, 14b and an enlarged part AR1 of the alternator shaft AR (see FIG. 9), around which the ring comes position, especially during expansion phenomena due to heating or accumulation of dust in this region of the alternator.
  • the injection of the overmolding material is preferably carried out at the level of this ring, and in particular at the level of the extra thicknesses 341.
  • the concave surfaces 342 provided laterally and diametrically opposite are used for gripping the part by a robot in order to press fitting on an alternator shaft.
  • the part can be gripped according to two possible orientations, mutually offset by 180 °, and it was indicated above how the notches 30, 30 ′, 30 "made it possible to ensure a polarization to choose the orientation which is suitable for supplying winding with the correct polarity.
  • the recesses 323a, 323b which project radially outward from the cylindrical surface defined by the cylinder 10 and its insulating extension 22, make it possible, when mounting the part on certain alternators, to define an axial stop for a ball bearing provided between the alternator shaft and its casing to constitute the rear bearing of the alternator.
  • FIGS 10 and 11 show a part as described above mounted respectively on two alternators A of different models.
  • the alternator shaft is designated by AR, and a bearing for this shaft by R.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
  • Synchronous Machinery (AREA)
  • Insulating Bodies (AREA)

Claims (6)

  1. Kollektor, der auf die Welle eines Wechselstromgenerators, insbesondere eines Kraftfahrzeugs, aufzustecken ist, in der Ausführung durch Aufformung von nichtleitendem Material auf elektrisch leitenden Elementen und umfassend einen allgemein zylindrischen Körper (10a, 10b, 20, 22) mit zwei an seiner Außenfläche angeordneten Schleifringen (10a, 10b), die mit zwei Anschlußelementen (14a, 14b) für die Verbindung mit den Drahtenden (FB) einer Wicklung verbunden sind, wobei der Körper eine Bohrung (24) für die besagte Welle und eine Verlängerung aus nichtleitenden Material (28) über einen der beiden Schleifringe hinaus auf einer Seite umfaßt, auf der eine Aufsteckkraft ausgeübt werden soll , dadurch gekennzeichnet, daß wenigstens eine Ausklinkung (30, 30', 30") in die besagte Verlängerung in ihrer gesamten axialen Dicke eingearbeitet ist und eine Kante des anliegenden Schleifrings (10b) hervortreten läßt, so daß die Aufsteckkraft durch die besagte Ausklinkung direkt auf den besagten Schleifring ausgeübt werden kann.
  2. Kollektor nach Anspruch 1 , dadurch gekennzeichnet, daß wenigstens zwei Ausklinkungen (30, 30', 30") vorgesehen sind, die in der gesamten axialen Dicke der Verlängerung (28) eingearbeitet sind, und daß diese Ausklinkungen mit einer Rotationsasymmetrie auf 180° angeordnet sind, so daß sie als Einbaumarkierungen für die Winkelpositionierung des Kollektors (1) in einer von zwei möglichen Positionen dienen, die wiederum um 180° zueinander versetzt sind.
  3. Kollektor nach Anspruch 2 , dadurch gekennzeichnet, daß drei Ausklinkungen (30, 30', 30") mit einem Winkelabstand von 120° vorgesehen sind.
  4. Kollektor nach Anspruch 3 , dadurch gekennzeichnet, daß in die besagte Bohrung (24) zwei diametral gegenüberliegende Rillen (26, 26') eingearbeitet sind und daß eine (30) der Ausklinkungen winklig auf (26) eine der besagten Rillen ausgerichtet ist.
  5. Kollektor nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die bzw. jede Ausklinkung (30, 30', 30") über die gesamte radiale Breite der Verlängerung ausgebildet ist.
  6. Wechselstromgenerator, insbesondere für Kraftfahrzeuge , dadurch gekennzeichnet, daß er an einer Welle (AR) vorspringend einen Kollektor (1) nach einem der vorangehenden Ansprüche umfaßt.
EP94402049A 1993-09-16 1994-09-14 Kollektor für einen Wechselstromgenerator, insbesondere für ein Kraftfahrzeug Expired - Lifetime EP0644629B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9311043 1993-09-16
FR9311043A FR2710200B1 (fr) 1993-09-16 1993-09-16 Collecteur rapporté pour alternateur notamment de véhicule automobile.

Publications (2)

Publication Number Publication Date
EP0644629A1 EP0644629A1 (de) 1995-03-22
EP0644629B1 true EP0644629B1 (de) 1996-12-18

Family

ID=9450933

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94402049A Expired - Lifetime EP0644629B1 (de) 1993-09-16 1994-09-14 Kollektor für einen Wechselstromgenerator, insbesondere für ein Kraftfahrzeug

Country Status (8)

Country Link
US (1) US5459364A (de)
EP (1) EP0644629B1 (de)
JP (1) JP3497896B2 (de)
CN (1) CN1037048C (de)
DE (1) DE69401185T2 (de)
ES (1) ES2097013T3 (de)
FR (1) FR2710200B1 (de)
TR (1) TR28511A (de)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD425020S (en) * 1996-01-29 2000-05-16 C. E. Niehoff & Co. Electrical alternator
US5734218A (en) * 1996-05-13 1998-03-31 Litton Systems, Inc. Electrical slip ring and method of manufacturing same
KR20020017562A (ko) * 2000-08-31 2002-03-07 에릭 발리베 발전기의 슬립링 압입장치
JP2005261153A (ja) * 2004-03-15 2005-09-22 Denso Corp 車両用交流発電機
FR2870055B1 (fr) * 2004-04-30 2013-07-05 Valeo Equip Electr Moteur Machine electrique tournante polyphasee pour vehicule automobile, equipee de moyens magnetiques de suivi de la rotation du rotor de resistance mecanique amelioree
DE102004028781A1 (de) * 2004-06-16 2006-01-12 Ascom D.O.O. Elektrische Maschine
JP4123197B2 (ja) * 2004-06-28 2008-07-23 株式会社デンソー 車両用交流発電機
FR2884068B1 (fr) 2005-03-31 2007-07-27 Valeo Equip Electr Moteur Rotor de machine electrique tournante comportant un manchon intermediaire interpose entre l'arbre et les roues polaires et procede de realisation du rotor.
FR2969411B1 (fr) 2010-12-20 2012-12-28 Valeo Equip Electr Moteur Dispositif regulateur de tension pour une machine electrique tournante, palier d'une telle machine equipe d'un tel dispositif et une telle machine comportant un tel palier
FR2969410B1 (fr) 2010-12-20 2012-12-28 Valeo Equip Electr Moteur Dispositif regulateur de tension pour une machine electrique tournante, palier d'une telle machine equipe d'un tel dispositif et une telle machine comportant un tel palier
JP6250159B2 (ja) * 2014-06-18 2017-12-20 三菱電機株式会社 交流発電機のスリップリング装置
FR3040561B1 (fr) 2015-09-01 2017-08-25 Valeo Equip Electr Moteur Machine electrique tournante muni d'un rotor comprenant des poles en forme de griffe
FR3093868B1 (fr) 2019-03-14 2021-03-05 Renault Collecteur pour machine électrique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2671865A (en) * 1951-04-17 1954-03-09 Nippert Electric Products Comp Electrical collector ring assembly
DE3364660D1 (en) * 1982-05-06 1986-09-04 Lucas Ind Plc Small diameter slip ring assemblies and their production
JPS60200745A (ja) * 1984-03-23 1985-10-11 Hitachi Ltd 交流発電機用回転子
US5325003A (en) * 1992-11-23 1994-06-28 Ford Motor Company Molded rotor assembly for an alternator and method for making the same

Also Published As

Publication number Publication date
DE69401185D1 (de) 1997-01-30
EP0644629A1 (de) 1995-03-22
FR2710200A1 (fr) 1995-03-24
DE69401185T2 (de) 1997-05-15
US5459364A (en) 1995-10-17
TR28511A (tr) 1996-09-02
CN1037048C (zh) 1998-01-14
JPH07220844A (ja) 1995-08-18
ES2097013T3 (es) 1997-03-16
JP3497896B2 (ja) 2004-02-16
FR2710200B1 (fr) 1995-12-08
CN1104386A (zh) 1995-06-28

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