EP0021891B1 - Collecteur frontal pour machine électrique équipant notamment les véhicules automobiles - Google Patents

Collecteur frontal pour machine électrique équipant notamment les véhicules automobiles Download PDF

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Publication number
EP0021891B1
EP0021891B1 EP19800400756 EP80400756A EP0021891B1 EP 0021891 B1 EP0021891 B1 EP 0021891B1 EP 19800400756 EP19800400756 EP 19800400756 EP 80400756 A EP80400756 A EP 80400756A EP 0021891 B1 EP0021891 B1 EP 0021891B1
Authority
EP
European Patent Office
Prior art keywords
insulating support
armature
collector
conductors
projections
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
EP19800400756
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0021891A1 (fr
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/fr
Application granted granted Critical
Publication of EP0021891B1 publication Critical patent/EP0021891B1/fr
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
    • 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 metal hub 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.
  • 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 separation of said blades from the insulating support during operations of introduction, fixing and welding of the conductors of the armature in the collecting blades.
  • the fact of using a metal hub 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 detachment of said hub from the insulating support.
  • This second embodiment which has the advantage of having a more effective anchoring than that obtained by the first embodiment, however has the drawback 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 leading to the destruction of the armature when the electrical machine is powered up, if the fault could not be detected during control operations.
  • US Pat. No. 2,176,361 discloses a front collector, the collecting blades of which are obtained by cutting, from a copper plate, a part comprising an annular part on which the brushes of the electric motor rub. . Said part has projections on its inside diameter and on its periphery of the radial arms having protuberances at their end.
  • protuberances are then folded down at a determined angle to ensure their subsequent anchoring in an insulating support made of molded material.
  • the projections and the radial arms are folded back at 90 ° degrees, relative to the annular part, after which the insulating body is molded.
  • the disadvantage of this embodiment is that it causes, due to the radial arms, a significant loss of the material used, the proportion of material actually necessary for the operation of the motor, being the annular part on which the brushes rub. .
  • the object of the present invention is to remedy the aforementioned drawbacks and to this end relates to a front collector comprising a tubular metal hub and collecting blades arranged radially on a frustoconical insulating support, of molded material, by means of anchoring means provided on the rear face of each of the collecting blades, two of which are arranged towards each of the radial edges inside the perimeter of said blades and near their periphery, the insulating support comprising radial projections at its periphery, characterized in that the two anchoring means, provided at the periphery of each of the collecting blades, are embedded respectively in each of the radial projections of the insulating support, which projections are provided in a substantially rectangular shape and of constant thickness so as to provide effective anchoring of the two ways.
  • the radial projections of the insulating support determine between them cavities in which open housing notches for the conductors of the armature, which cavities have a dimension such that they leave a space between the conductors and the cavities receiving 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 housing for the varnish for impregnating the armature so as to improve its resistance during overspeed tests.
  • the collector comprises a tubular metallic 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, FIG. 1 are obtained by a stamping tool leaving a small thickness of material 2 between two consecutive blades, Figures 2 and 5.
  • Each of the collecting blades 1, is provided on the rear face with three anchoring points 3.3a and 3b in the frustoconical insulating support 4, FIGS. 2 and 5.
  • the anchoring point 3, FIG. 1, is provided in the central part of the collecting blades, the anchoring points 3a and 3b are formed towards each of the radial edges, inside the perimeter of said blades and near their part. peripheral.
  • the anchor points 3.3a and 3b are obtained by lifting material using a cutting tool.
  • the frustoconical insulating support 4 made of molded material, has at its periphery radial projections 5, Figures 2,3 and 4.
  • the anchoring means 3a and 3b formed at the periphery of each of the collector blades 1 are embedded respectively in each of the radial projections 5, which are provided in a substantially rectangular shape and of constant thickness so as to provide an effective anchoring of the means 3a and 3b in the molded material constituting said projections 5, FIG. 5.
  • the projections 5 of substantially rectangular shape and of constant thickness determine between them cavities 6, FIGS. 4, 5, 6 and 7, into which open notches 7, FIG. 6, for housing the conductors 8 of the armature.
  • the cavities 6 have a dimension such that they leave between the conductors 8 and the cavities 6 a space receiving an immobilizing agent for the conductors 8, such as the varnish for impregnating the armature.
  • a recess 9 is provided on the sides 5a, 5b of the projections 5, so as to form a housing for the varnish for impregnating the armature so as to improve its behavior during overspeed tests.
  • the tubular metal hub 10 (see FIG. 2) has 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 made 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. It is also obvious that the annular flange 10a can be between a certain distance from the rear face of the collecting blades and the end of the frustoconical part of the insulation.

Landscapes

  • Motor Or Generator Current Collectors (AREA)
  • Manufacture Of Motors, Generators (AREA)
EP19800400756 1979-06-07 1980-05-29 Collecteur frontal pour machine électrique équipant notamment les véhicules automobiles Expired EP0021891B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7914521A FR2458920A1 (fr) 1979-06-07 1979-06-07 Collecteur frontal pour induit de machine electrique equipant notamment les vehicules automobiles
FR7914521 1979-06-07

Publications (2)

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

Family

ID=9226298

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19800400756 Expired EP0021891B1 (fr) 1979-06-07 1980-05-29 Collecteur frontal pour machine électrique équipant notamment les véhicules automobiles

Country Status (4)

Country Link
EP (1) EP0021891B1 (show.php)
DE (1) DE3062420D1 (show.php)
ES (1) ES251233Y (show.php)
FR (1) FR2458920A1 (show.php)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4028420A1 (de) * 1990-09-07 1992-03-12 Kautt & Bux Kg Plankommutator und verfahren zu seiner herstellung
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

Family Cites Families (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
GB1487923A (en) * 1974-02-16 1977-10-05 Lucas Electrical Ltd Face commutator
ZA775055B (en) * 1976-09-04 1978-07-26 Lucas Industries Ltd Method of manufacturing an armature assembly for a dynamo electric machine

Also Published As

Publication number Publication date
FR2458920A1 (fr) 1981-01-02
ES251233Y (es) 1981-03-16
DE3062420D1 (en) 1983-04-28
ES251233U (es) 1980-10-01
FR2458920B1 (show.php) 1983-04-08
EP0021891A1 (fr) 1981-01-07

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