EP0736230A1 - Collecteur de machine electrique de petites ou moyennes dimensions et son procede de fabrication - Google Patents

Collecteur de machine electrique de petites ou moyennes dimensions et son procede de fabrication

Info

Publication number
EP0736230A1
EP0736230A1 EP95903898A EP95903898A EP0736230A1 EP 0736230 A1 EP0736230 A1 EP 0736230A1 EP 95903898 A EP95903898 A EP 95903898A EP 95903898 A EP95903898 A EP 95903898A EP 0736230 A1 EP0736230 A1 EP 0736230A1
Authority
EP
European Patent Office
Prior art keywords
annular groove
commutator
ring
longitudinal axis
segment body
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.)
Ceased
Application number
EP95903898A
Other languages
German (de)
English (en)
Inventor
Joze Potocnik
Boris Kogej
Boris Krzisnik
Zdenko Rupnik
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.)
KOLEKTOR d o o IDRIJA
Original Assignee
KOLEKTOR d o o IDRIJA
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 KOLEKTOR d o o IDRIJA filed Critical KOLEKTOR d o o IDRIJA
Publication of EP0736230A1 publication Critical patent/EP0736230A1/fr
Ceased legal-status Critical Current

Links

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
    • 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

Definitions

  • the invention relates to a commutator, in particular for small to medium-sized electrical machines, with a plurality of commutator segments which are spaced apart from one another in a ring and form a segment body, and with at least one annular groove which is concentric with the inner lateral surface of the segment body and in which a reinforcing ring under tension is arranged and a method for producing such a commutator.
  • a commutator and a method for its manufacture are also known, the reinforcing ring being expanded after being applied to a seat by supporting the segments from the outside and the material forming the seat under plastic Deformation can be moved radially outwards.
  • the segment body of such a commutator is composed of segments which have spacer elements formed on one or both sides in their outer region. After the segment body has been pressed out with molding material, the segment body must be turned off until the spacer elements have been completely removed. This results in a not too low waste of the relatively valuable material, which makes both the entire process and the commutator considerably more expensive.
  • the invention is therefore based on the object of providing a commutator of the type mentioned at the outset and a method for producing such a commutator, with which the disadvantages of the known commutators and methods are avoided and high-strength commutators can be produced inexpensively using technically simple means can.
  • a commutator the segment body of which has an annular groove on the respective end face which essentially has a linearly changing diameter.
  • This annular groove is arranged with respect to the longitudinal axis of the segment body and a course from its open end to its bottom with a relatively slight inclination to the longitudinal axis of the segment body.
  • the inclination of the annular groove has an angle o of 1 to 5 °.
  • the commutator segments are held non-positively at a constant radial distance by means of a reinforcement ring.
  • the inclination of the annular groove can be arranged both to the longitudinal axis and away from the longitudinal axis.
  • a further embodiment of the commutator according to the invention consists in that the surface of the ring groove which is closer to the contact area of the commutator segments is formed with an undercut in the area of the open end of the ring groove and practically in the area of the upper two thirds of the ring groove depth, which provides the insertion the armoring ring relieved.
  • An advantageous embodiment of the method according to the invention consists in that each reinforcement ring of a constant diameter is inserted into the annular groove by means of a stamp, which has a substantially linearly changing diameter with respect to the longitudinal axis of the segment body, in such a way that the reinforcement ring is free in the annular groove , ie unloaded, is arranged.
  • the reinforcement ring is pressed with a punch simultaneously to the bottom of the ring groove by the reinforcement ring being elastically deformed in the radially inward direction.
  • elastic radial stresses are introduced into the lower region of the reinforcement ring, which push the commutator segments outwards, ie away from the longitudinal axis of the segment body.
  • each seat of the reinforcement ring is on the ⁇ Tyrol side and in the radial direction outwards, i.e. away from the longitudinal axis of the segment body, at least partially plastically deformed, as a result of which additional elastic radial stresses are introduced into the upper region of the reinforcement ring.
  • the commutator segments are thereby pulled inwards against the longitudinal axis of the segment body.
  • the introduction of elastic tensions in the reinforcement ring ensures that the commutator segments are securely positioned in their positions. This also reliably prevents displacement of the commutator segments in the radial direction while the commutator is in operation.
  • each seat of the reinforcement ring in the radial direction to the outside, ie away from the longitudinal axis of the segment body, is carried out in such a way that a notch is pressed, ie pierced, in each seat mentioned, which can be formed in cross section as an acute-angled triangle, whereby the stamp is shaped accordingly. That part of the material of the seat of the reinforcement ring that is connected to the the latter is in contact, deformed away from the longitudinal axis of the segment body by means of, for example, the triangular projection on the indentation punch. The opposite part of the material of the seat of the reinforcement ring remains essentially undeformed.
  • the spaces between the commutator segments and / or the space in the area of the annular groove are at least partially encapsulated with an insulating material; at the same time, a cylindrical hub of the commutator can be produced from the same insulating material.
  • the spacer elements used for positioning the segments are then removed from the spaces between the segments.
  • FIG. 1 shows a partial view of a commutator segment according to the invention to show the seat of the reinforcement ring;
  • FIG. 2 shows a longitudinal section of the segment body according to the invention before the reinforcing ring is pressed into the annular groove;
  • FIG. 3 shows a segment body according to FIG. 2 after the reinforcement ring has been pressed into the annular groove
  • FIG. 4 shows a segment body according to FIG. 3 after the plastic deformation of the seat of the reinforcement ring
  • FIG. 5 shows a longitudinal section of the commutator after casting with insulating material in the finished state.
  • FIG. 5 shows a commutator according to the invention, which has a series of commutator segments 1 arranged in a ring, which have a predetermined equal distance in the circumferential direction.
  • Each commutator segment 1 has a contact area 2 for contact with a brush, not shown.
  • the commutator segments 1 are held with at least one reinforcing ring 3 at a constant radial distance and with an insulating material forming a hub 4, e.g. B. synthetic resin, cast.
  • a hub 4 e.g. B. synthetic resin
  • the annularly arranged commutator segments 1 essentially form a segment body 5, at the respective front end of which an annular groove 6 is formed with a substantially linearly changing diameter and the center line of which runs essentially coaxially with the longitudinal axis 15 of the segment body 5.
  • the annular groove 6 is arranged along the longitudinal axis 15 of the segment body 5 with an inclination relative to the longitudinal axis 15 of the segment body 5 that is relatively slight with respect to its course from the open end to the floor.
  • the inclination of the annular groove 6 has an inclination angle ⁇ which is advantageously 1 to 5 ° (FIG. 1).
  • the respective annular groove 6 and the inner circumferential surface 7 of the segment body 5 form a seat 8 of the reinforcing ring 3.
  • the surface of the annular groove 6, which is closer to the contact area 2 of the commutator segments 1, is practical in the region of the open end of the annular groove 6 formed in the area of the upper two thirds of the ring groove depth with an undercut 9, which facilitates the insertion of the reinforcement ring 3.
  • the reinforcement ring 3 is arranged in the annular groove 6, wherein it essentially has the same angle of inclination ⁇ as the annular groove 6 itself.
  • the commutator segments 1 are thus held in a force-locking manner at a constant radial distance.
  • the commutator segments 1, z. B. consist of copper, assembled to a segment body 5.
  • the commutator segments 1 are spaced apart from one another in a manner known per se, e.g. B. with a cage, not shown, made of plastic, whereupon they are brought into an annular holding device 10.
  • the reinforcing ring 3 is pressed into the respective annular groove 6 in a first stage by means of pressing-in punches 11, which are centered on the inner lateral surface 7 of the segment body 5, until it rests stress-free on the wall of the annular groove 6 in the area immediately below the undercut 9.
  • the reinforcement ring 3 Before insertion, the reinforcement ring 3 has a substantially constant diameter.
  • the reinforcement ring 3 In a second stage of the press-in process, the reinforcement ring 3 is pressed completely into the annular groove 6, as a result of which it is elastically deformed in the radially inward direction, ie against the longitudinal axis of the segment body 5. As a result, elastic radial tension is generated in the reinforcement ring 3 and press the commutator segments 1 outwards, ie away from the longitudinal axis of the segment body 5.
  • two guides 12 are inserted into the segment body 5, which extend approximately in the axial direction up to the region of the bottom of the annular groove.
  • two further plungers 13 are guided, which are formed on the respective end face, ie the seat of the side facing the reinforcement ring 3, with a projection 14.
  • the latter extends on the end face over the entire circumference of the respective indentation punch 13, and in a suitable case it is designed in cross section as an acute-angled triangle.
  • the seat is thus plastically deformed by means of the projection 14, specifically in such a way that the material part of the seat 8 which rests on the reinforcement ring 3 is displaced in the direction away from the longitudinal axis of the segment body 5 by means of the triangular projection 14, as a result of which the reinforcement ring 3 is additionally elastically deformed.
  • the reinforcement ring 3 is additionally elastically deformed.
  • 3 additional radial tensions are introduced into the reinforcement ring, which cooperate in holding the segment body 5 together.
  • the aforementioned deformation also prevents the reinforcing ring 3 from slipping out of the annular groove 6.
  • the opposite part of the material of the seat 8 remains essentially undeformed since the undercut 9 is arranged there.
  • the last stage of the method for producing the commutator according to the invention is the filling of the spaces between the segments 1 and / or at least the partial potting of the space in the area of the annular groove 6 with an insulating material, while simultaneously producing the cylindrical hub 4 of the commutator the same insulating material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Motor Or Generator Current Collectors (AREA)

Abstract

Un collecteur comprend une pluralité de lames (1) annulaires régulièrement espacées dans le sens de leur circonférence. Chaque lame (1) comprend une rainure annulaire (6) qui a un diamètre linéairement variable. Entre son extrémité ouverte et son fond, la rainure annulaire (6) est légèrement inclinée par rapport à l'axe longitudinal (15) du corps de lame (5). Une bague de renforcement (3) pressée dans la rainure annulaire (6) crée des tensions radiales dans le corps de lame (5) et maintient par liaison de force les lames (1) du collecteur à une distance mutuelle radiale constante.
EP95903898A 1993-12-16 1994-11-29 Collecteur de machine electrique de petites ou moyennes dimensions et son procede de fabrication Ceased EP0736230A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SI9300660A SI9300660A (en) 1993-12-16 1993-12-16 Commutator for small and midle electric machines and process for making it
SI9300066 1993-12-16
PCT/IB1995/000024 WO1995017031A1 (fr) 1993-12-16 1994-11-29 Collecteur de machine electrique de petites ou moyennes dimensions et son procede de fabrication

Publications (1)

Publication Number Publication Date
EP0736230A1 true EP0736230A1 (fr) 1996-10-09

Family

ID=20431301

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95903898A Ceased EP0736230A1 (fr) 1993-12-16 1994-11-29 Collecteur de machine electrique de petites ou moyennes dimensions et son procede de fabrication

Country Status (3)

Country Link
EP (1) EP0736230A1 (fr)
SI (1) SI9300660A (fr)
WO (1) WO1995017031A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19530051C2 (de) * 1995-08-16 2002-02-07 Kirkwood Ind Gmbh Steckkommutator
BR9612814A (pt) * 1996-12-12 2000-05-02 Comtrade Handels Gmbh Comutador com anel de armação

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE918458C (de) * 1941-03-22 1954-09-27 Siemens Ag Lamellenbefestigung fuer Kommutatoren, insbesondere fuer elektrische Maschinen
US3253172A (en) * 1962-03-05 1966-05-24 Dayton Prec Corp Sub-flush commutator
JPS56136159A (en) * 1980-03-28 1981-10-24 Toyo Electric Mfg Co Ltd Manufacture of mold commutator
DE3245699A1 (de) * 1982-12-10 1984-06-14 Kautt & Bux Kg, 7000 Stuttgart Kommutator und verfahren zu seiner herstellung
DE3823845A1 (de) * 1988-07-14 1990-01-18 Kautt & Bux Kg Kommutator und verfahren zu seiner herstellung
FR2670334A1 (fr) * 1990-12-06 1992-06-12 Cheveux Yves Collecteur moule pour machine tournante electrique du type tambour.
DE4201593C2 (de) * 1992-01-22 1999-06-10 Bosch Gmbh Robert Kommutator für elektrische Maschinen und Verfahren zu seiner Herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9517031A1 *

Also Published As

Publication number Publication date
WO1995017031A1 (fr) 1995-06-22
SI9300660A (en) 1995-06-30

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