EP0931369A1 - Mode de fabrication de commutateurs, et commutateur fabrique selon le procede en question - Google Patents

Mode de fabrication de commutateurs, et commutateur fabrique selon le procede en question

Info

Publication number
EP0931369A1
EP0931369A1 EP97909250A EP97909250A EP0931369A1 EP 0931369 A1 EP0931369 A1 EP 0931369A1 EP 97909250 A EP97909250 A EP 97909250A EP 97909250 A EP97909250 A EP 97909250A EP 0931369 A1 EP0931369 A1 EP 0931369A1
Authority
EP
European Patent Office
Prior art keywords
basket
segments
commutator
webs
molding compound
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
EP97909250A
Other languages
German (de)
English (en)
Other versions
EP0931369B1 (fr
Inventor
Helmut Stolpmann
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.)
Kirkwood Industries GmbH
Original Assignee
Kirkwood Industries GmbH
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 Kirkwood Industries GmbH filed Critical Kirkwood Industries GmbH
Priority to SI9730179T priority Critical patent/SI0931369T1/xx
Publication of EP0931369A1 publication Critical patent/EP0931369A1/fr
Application granted granted Critical
Publication of EP0931369B1 publication Critical patent/EP0931369B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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 method for producing commutators, in which a plurality of metallic segments are inserted into a mounting basket to form a segment assembly, in which the segments are arranged in a positional arrangement which is insulated from one another and forms a commutation slideway, and the Segment dressing to form an insulating body with segments embedded therein is pressed with a press-formable, insulating molding compound.
  • the invention also relates to a commutator produced by such a method.
  • the procedure is such that after inserting the segments punched out of a metallic material into the mounting basket designed as a plastic basket and after adding any further components that may be provided, for example reinforcement rings, the pressing is carried out, the cavities in Segment dressing to be filled with molding compound.
  • the plastic basket is then removed to be disposed of as special waste.
  • the invention is based on the object of specifying a method which, in spite of the use of assembly baskets which facilitate the manufacturing process, enables particularly inexpensive and environmentally friendly manufacture of the commutators.
  • this object is achieved in that the assembly basket is pressed together with the segment assembly with the molding compound so that the assembly basket is molded into the insulating body as a permanent, integral part.
  • the basket according to the invention is incorporated as an integral part of the commutator, not only are the costs for removing and disposing of the baskets eliminated in the method according to the invention, but there are also no additional material costs for insulation material because the basket forms part of the insulating body of the commutator forms.
  • thermosetting material is used to produce the baskets, which also forms the molding compound during the pressing.
  • a particularly homogeneous structure of the insulating body formed in this way results.
  • the commutator according to the invention produced by the method shown is characterized in that its insulating body contains a mounting basket which is molded into the molding compound and serves as an insulating support body for the segmental association.
  • a gradual expansion of the commutator according to the invention into a high-performance commutator results from the use of reinforcing rings and pins for supporting them as further integral components.
  • Fig. 1 is a perspective view of an embodiment of a
  • Plastic basket for use in the manufacture of the commutator according to the invention seen with a view of the front or hook side of the commutator;
  • FIG. 2 shows a perspective view of the basket from FIG. 1, looking towards the rear side of the commutator;
  • FIG. 3 shows a longitudinal section of the basket, the cut being made in different cutting planes in the upper and lower half of the drawing;
  • FIG. 6 shows a side view of a copper segment which can be accommodated in the basket
  • Figure 7 is a front view of the segment of Figure 6;
  • Fig. 8 is an exploded partial view of the
  • Basket with copper insert that can be used in this, two in Reinforcement rings to be used in the basket as well as two ceramic pins and
  • Fig. 9 is a partial longitudinal section of the finished commutator containing the basket as a molded component.
  • FIGS. 1 and 2 of a basket 1 molded from thermosetting plastic is used to produce a commutator which has twenty-four copper segments 3 (see in particular FIGS. 6 and 7).
  • the basket 1 is a composite of twenty-four webs 5, which is rotationally symmetrical to the axis of rotation 7 (FIG. 3) of the commutator, and which are arranged at equal distances from one another in planes parallel to the axis 7 and extending radially.
  • the webs 5 are connected at their radially inner foot region by an inner ring 9 which defines the inner diameter of the basket 1.
  • the webs 5 are connected by an outer ring 11.
  • the segments 3 show the shape of the segments 3 made of silver alloy copper, which can be received between the webs 5 on the peripheral region of the basket 1.
  • the segments 3 are designed as an elongated profile body, the slightly curved upper side 1 3 of which forms part of the commutation slideway on the circumference of the collector.
  • the segment on the top 1 3 is extended by a narrow extension 1 5, which forms the connecting hook of the segment 3 in question after bending.
  • the segments 3 have a profile shape which is essentially complementary to the clear space between two adjacent webs 5 of the basket 1 (FIG. 4), so that the segments 3 are inserted between adjacent webs 5 with an axial insertion movement can.
  • the basket 1 is positioned positively with the aid of cams 27 formed on its inner ring 9 and projecting radially inwards. kidney.
  • the outer ring 11 of the basket 1 has a recess 14 between each pair of webs, through which the extension 1 5 of the segment 3 in question, which forms the hook, extends forward.
  • the outer ring 11 forms a stop surface 12 on which the end face of the segments 3 bears against the root of the extension 15 in order to define the axial position of the segments 3 in the basket 1.
  • the segments 3 in their foot part 1 7 each have a recess 19 at both ends, which has the shape of an axially extending slot which is open at the respective end of the foot part 1 7.
  • the recesses 19 define an annular space on the hook side and an annular space on the side, within each of which an armoring ring 21 can be received, see FIG. 8 and 9.
  • the reinforcement rings 21 are steel rings.
  • the webs 5 are graduated so that 1 shoulders are formed in the area of the rear side of the basket, which form seating surfaces 23 for the outer peripheral surface of the one reinforcement ring 21.
  • the webs 5 are stepped in a corresponding manner, so that shoulders with seating surfaces 25 are formed, against which the second, front reinforcing ring 21 lies with its outer peripheral surface. After inserting the reinforcement rings 21 into the basket 1, the rings rest against their seat surfaces 23 and 25 with slight pressure.
  • the radial position of the seat surfaces 23 and 25, the radial width of the recesses 1 9 of the segments 3 as seen in the radial direction and the wall thickness of the reinforcement rings 21 are dimensioned such that the outer circumferential surface and the inner circumferential surface of the reinforcement rings 21 each have radial distances from the edges delimiting the recesses 19 of the segments 3, the width of the reinforcement rings 21 measured in the axial direction and the corresponding depth of the recesses 19 being dimensioned such that the reinforcement rings also have an axial distance from the base of the recesses 19.
  • the composite thus formed is pressed with molding compound.
  • the composite of basket 1, segments 3 and reinforcing rings 21 is inserted into an injection or pressing tool for this purpose, after any shrinkage of the segment association has been carried out beforehand.
  • a steel sleeve 29 is inserted into the injection or pressing tool, which defines the axial bore of the commutator. All cavities of the composite outside the sleeve 29 are now filled with the molding compound, so that an insulating body containing the basket 1 as a permanent, integral component is formed, see FIG. Fig. 9.
  • the profile of the segments 3 has a rounded notch 31 on both sides of its foot part 17.
  • these notches 31 form holding surfaces for ceramic pins 33, which thus act as locking pins between the Crosspieces 5 of the basket 1 can be used so that they rest on the inner surface of the reinforcing ring 21 in question, in order to secure the segments 3 against radial forces in cooperation with the holding surfaces on the notches 31.
  • 9 shows the insulating body with the inserted ceramic pins 33 embedded in the molding compound. The support of the segments 3 on the reinforcement rings 21 via the pins 33 results in a high-performance commutator which meets increased requirements, in particular the stress caused by higher speeds of the electric motor , which has the commutator according to the invention.
  • ceramic pins 33 are provided both on the hook side and on the board side. It is understood that depending on the nature of the load occurring, the pins could only be provided on one side. For the assembly of the pins 33, a slight pressure-fitting fit is provided between them and the associated segments 3, so that a slight deformation of the copper segments 3 is generated. In order to allow a relatively wide tolerance in the diameter of the pins 33, knurling of the contact areas on the notches 31 can be provided on the segments 3.
  • the basket 1 consists of the same molding compound as is used in pressing to form the insulating body, different insulation materials that are specifically matched to the requirements of the individual components (basket and insulating body) could be used, for example the basket 1 could be a ceramic part be and / or a thermoplastic can be used as a molding compound.
  • the commutator can also be manufactured without an inner steel sleeve 29.

Landscapes

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

Abstract

La présente invention porte sur un mode de fabrication de commutateurs consistant à placer dans une corbeille d'assemblage (1) plusieurs segments (3) réalisés dans un matériau métallique pour constituer un treillis de segments. Le treillis est comprimé à l'aide d'une matière isolante moulable en matrice pour former un corps isolant à segments (3) encastrés, dans lequel est moulée la corbeille d'assemblage (1) en tant qu'élément constitutif intégré fixe.
EP97909250A 1996-10-12 1997-09-11 Mode de fabrication de commutateurs, et commutateur fabrique selon le procede en question Expired - Lifetime EP0931369B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI9730179T SI0931369T1 (en) 1996-10-12 1997-09-11 Method for manufacturing commutators and commutator made according to this method

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19642138A DE19642138A1 (de) 1996-10-12 1996-10-12 Verfahren zum Herstellen von Kommutatoren und nach dem Verfahren hergestellter Kommutator
DE19642138 1996-10-12
PCT/EP1997/004970 WO1998016979A1 (fr) 1996-10-12 1997-09-11 Mode de fabrication de commutateurs, et commutateur fabrique selon le procede en question

Publications (2)

Publication Number Publication Date
EP0931369A1 true EP0931369A1 (fr) 1999-07-28
EP0931369B1 EP0931369B1 (fr) 2001-05-23

Family

ID=7808576

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97909250A Expired - Lifetime EP0931369B1 (fr) 1996-10-12 1997-09-11 Mode de fabrication de commutateurs, et commutateur fabrique selon le procede en question

Country Status (4)

Country Link
EP (1) EP0931369B1 (fr)
DE (2) DE19642138A1 (fr)
ES (1) ES2158509T3 (fr)
WO (1) WO1998016979A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19922235C2 (de) * 1998-08-21 2002-05-23 Kirkwood Ind Gmbh Kommutator und Verfahren zur Herstellung eines Kommutators
DE19837961C2 (de) * 1998-08-21 2001-08-16 Kirkwood Ind Gmbh Kommutator und Verfahren zur Herstellung eines Kommutators
DE10250261A1 (de) * 2002-10-28 2004-06-09 Kolektor D.O.O. Kommutator für eine elektrische Maschine und Verfahren zu seiner Herstellung
CN101740985B (zh) * 2008-11-18 2014-03-12 广东德昌电机有限公司 换向器及其制造方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1135654A (en) * 1966-07-06 1968-12-04 Lubomir Svatek Improvements in or relating to electrical rotary machines
US3643314A (en) * 1970-07-22 1972-02-22 Kaut & Bux Ohg Device for spacing the segments of a commutator
US4056882A (en) * 1973-10-05 1977-11-08 Airscrew Howden Limited Method of making a dimensionally stable commutator
DE7634129U1 (de) * 1976-10-29 1977-02-10 Fa. Heinrich Menke Jun., 5750 Menden Kunststoffleisten zur Herstellung von trommeiförmigen PreBstoffkommutatoren
DE3003825A1 (de) * 1980-02-02 1981-08-13 Friedrich Nettelhoff Beleuchtungskörper-und Metallwarenfabrik, 5750 Menden Distanzierelement
DE3812585A1 (de) * 1987-04-16 1988-11-03 Nettelhoff Friedrich Fa Kollektor fuer einen elektromotor sowie armierungsring zu diesem
GB2214723B (en) * 1988-01-19 1992-01-29 Johnson Electric Ind Mfg A commutator
FR2670334A1 (fr) * 1990-12-06 1992-06-12 Cheveux Yves Collecteur moule pour machine tournante electrique du type tambour.
DE4302853C1 (de) * 1993-02-02 1994-02-03 Bosch Gmbh Robert Kommutator für elektrische Maschinen und Verfahren zur Herstellung eines Kommutators

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9816979A1 *

Also Published As

Publication number Publication date
DE59703617D1 (de) 2001-06-28
WO1998016979A1 (fr) 1998-04-23
ES2158509T3 (es) 2001-09-01
EP0931369B1 (fr) 2001-05-23
DE19642138A1 (de) 1998-04-23

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