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
• • 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
• • 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
  • Y10T29/49789—Obtaining plural product pieces from unitary workpiece
  • Y10T29/49798—Dividing sequentially from leading end, e.g., by cutting or breaking

Definitions

• the invention relates to a reinforcement ring for rotary bodies, for example commutators, a method for its production and the use of the reinforcement rings according to the invention for commutators.
• commutators which are reinforced with glass fiber reinforcement rings.
• the reinforcing rings are also electrical insulators, such commutators have a weakness compared to the commutators armed with steel rings. This weakness manifests itself when these commutators are used for highly heat-loaded motors or in long-term operation under high temperature influences. It is also possible that there is a thermal overload due to some fault. With all thermal overloads, the insulation ring or glass fiber ring may soften locally.
• the consequence of this is that the commutator segments can shift beyond the tolerance values, as a result of which the service life of such commutators is considerably reduced.
• the invention is therefore based on the object of providing a reinforcement ring which can be subjected to a high thermal load and at the same time retains the advantages of glass fiber reinforcement rings.
• an armoring ring for rotating bodies in which at least one metal ring which is rectangular in cross section is connected at the end to a unit with a glass fiber ring which is rectangular in cross section.
• the glass fiber ring has a greater radial height than the metal ring, and that the protruding area is offset from the metal ring and rests on one or both of the radial surfaces or lateral surfaces of the metal ring.
• a further advantage of this composite reinforcement ring is that the respective diameters, on which the two rings seem to overlap, with a very tight tolerance.
• the diameter tolerances in the assembly point have to be many times smaller than in the case of the reinforcement rings according to the invention.
• the corresponding reinforcing ring has two metal rings which are attached to the respective end faces of the glass fiber ring.
• This strength can be increased further if the reinforcement ring is designed in such a way that the glass fiber ring has both a larger outside diameter and a smaller inside diameter than both metal rings and both projection areas are partially axially offset in the direction of the metal rings that the one protruding area bears against both the radial inner surface of the one metal ring and the other protruding area against the radial outer surface of the other metal ring, the two metal rings advantageously being of identical design.
• a further object on which the invention is based is to specify a method for producing a reinforcement ring for rotating bodies, for example commutators, which has a high heat resistance, the respective advantages of metal rings and glass fiber rings and, at the same time, can be produced very inexpensively.
• the solution to this problem according to the invention consists in a method for producing a reinforcement ring for rotating bodies, for example commutators, with the method steps: a) producing at least one metal ring which is rectangular in radial cross section, for example by punching out from a sheet metal, cutting from a metal tube or by deep drawing from sheet metal;
• the displacement of the protruding area is a punching process in which the at least one metal ring is part of the punching tool. This advantage can be increased even more if the second part of the punching tool is a circular groove formed from punched-out areas in the commutator segments, since the protruding area is displaced to the metal ring simultaneously with the mounting of the reinforcing ring.
• the reinforcement rings according to the invention can be used particularly advantageously for the reinforcement of the segments in a commutator.
• Reinforcement rings in which one or both radial surfaces of the metal ring are partially covered with glass fiber material are particularly advantageous, it being particularly advantageous if these glass fiber parts can be moved by means of a stamping process.
• This punching process can be carried out separately in a punching tool or directly in the commutator itself. In the latter case, the metal ring serves as part of the punching tool, but the circular groove of the punched-out segments serves as the second tool part (as shown, for example, in FIG. 9).
• the reinforcing rings provided with protruding areas open up a very simple possibility of providing the metal ring part with a desired pretension if the reinforcing ring is pressed with the glass fiber side ahead into a circular groove provided in the commutator, which circular groove is chamfered in the axial direction in such a way that the glass fiber ring is tilted either to the axis or to the outer surface of the rotation, whereby the metal ring is biased either radially inwards or radially outwards.
• the use of the reinforcement rings according to the invention enables both the steel ring and part of the glass fiber ring to form the supporting part of the reinforcement ring, it being possible for the protruding area to serve as an insulation layer between the steel ring and the copper commutator segments.
• the use of the reinforcement rings according to the invention makes it possible for the design designs of the commutator reinforcement to be adapted to the different quality requirements for commutators.
• the advantage of the constructions is that in all cases a supporting part of the set ring is elastically expanded and biased, whereby the commutator is given the characteristic of the so-called biased commutators.
• Another advantage over known constructions is that part of the space between the steel ring and the anchors of the copper segments is filled with potting compound with which the entire commutator is potted. If a highly heat-resistant compound is used as the casting compound, the copper segments are additionally supported against the steel ring with a highly resistant material.
• reinforcement rings according to the invention can be leaned directly against the copper segments on both sides of the ring. This makes it possible to drive the ring directly into the grooves of the copper segments, the ring being wedged into the segments and the segments thereby being aligned in precise radial positions.
• FIG. 1 shows a cross section through a glass fiber ring before assembly with a steel ring
• FIG. 2 shows a top view of the glass fiber ring from FIG. 1;
• FIG. 3 shows a partial cross section of a first embodiment according to the invention
• FIG. 4 shows a partial cross section of a second embodiment according to the invention
• FIG. 5 shows a partial cross section of a third embodiment according to the invention
• FIG. 6 shows a partial cross section of a fourth embodiment according to the invention.
• FIG. 7 shows a partial cross section through a commutator with a reinforcement ring according to the first embodiment
• FIG. 8 shows a partial cross section through a commutator with an armoring ring according to the second embodiment
• FIG. 9 shows a partial cross section through a commutator with an armoring ring according to the third embodiment.
• FIG. 10 shows a partial cross section through a commutator with an armoring ring according to the second embodiment, but with a fourth embodiment
• FIG. 11 shows a partial cross section through a commutator with an armoring ring according to a third embodiment with two metal rings:
• FIGS. 1 and 2 a glass fiber ring or insulating ring 14 is shown in different views before it is assembled with a metal or steel ring 12 to form a reinforcement ring 10.
• FIGS. 3 to 6 each show different cross-sectional designs of a reinforcement ring 10, 10 ', 10 "and 10"'.
• the reinforcement ring 10 shown in FIG. 3 consists of the metal ring 12 with a rectangular cross section and the glass fiber ring 14, also with a rectangular cross section, the radial height of the glass fiber ring 14 being greater than the radial height of the steel ring 12.
• the insulating ring 14 has the same or a smaller inner radius than the metal ring 12, and there is a radial projection 16 which axially displaces in the direction of the metal ring 12 by means of a stamping process is that part of the radial outer surface of the steel ring 12 is covered with this protrusion 16, but this protrusion 16 still touches a region of the glass fiber ring 14.
• the reinforcement ring 10 'shown in FIG. 4 differs from the embodiment according to FIG. 3 in that an overlap region 18 bears against the surface of a steel ring 12' pointing to the axis and in addition a glass fiber ring 14 'has the same or larger outer diameter than a metal ring 12' .
• both radial surfaces of a steel ring 12 ′′ are partially covered with protruding areas 20 of a glass fiber ring 14 ′′.
• the glass fiber ring 14 has a shoulder which lies opposite the steel ring 12"
• a commutator 22 which is provided on its outer surface with segments 24 which are embedded in molding material 26.
• the commutator 22 also has a circular groove 28, which is essentially formed by cutouts in the segments 24 and their circular arrangement. This circular groove 28 is arranged concentrically to the outer circumference of the commutator 22.
• the characteristic of the reinforcement ring 10 is that both rings 12, 14 touch on the end face, or that the glass fiber ring support part is extended to the steel ring 12, the outer layer of the glass fiber ring 14 being shifted and the outer jacket of the Steel ring 12 clasped and thus connects the two rings 12, 14.
• the reinforcement ring 10 thus formed consists of three parts, one part of which is the steel ring 12, the second part is the supporting part of the glass fiber ring 14 and the third part is the protruding area 16 which serves as an insulation covering of the steel ring 12 and at the same time the Steel ring 12 connects to the glass fiber ring 14.
• the commutator armouring in this example of use is designed in such a way that the supporting part of the glass fiber ring 14 is elastically drawn onto the anchors of the segments 24, for example made of copper.
• the force resulting from the elastic expansion of this part causes a force component on the segments 24 in the direction of the axis of the commutator 22.
• the segments 24 press on the insulation jacket of the steel ring 12 formed by the overhang region 16, which is thereby compressed and firmly clamped .
• the steel ring 12 is thereby subjected to pressure, whereas the supporting part of the glass fiber ring 14 is expanded and tensile.
• the parts which are the same as the example of use according to FIG. 7 are provided with the same reference numbers, but with a' for easier distinction.
• the commutator armoring is designed according to this example of use so that the original supporting part of the glass fiber ring 14 'with the outer circumference is pressed inwards in the radial direction on the segments 24' of the commutator 22 'via the cone in the circular groove 28'.
• the steel ring 12 ' is, however, stretched radially outward by means of deformation of the armature of the segments 24' and is thereby clamped in a prestressed state and firmly against displacement.
• the reinforcement ring 10 ′′ composed for this example of use consists of a steel ring 12 ′′ having a rectangular cross-section, the axial ring height being greater than the radial height of the steel ring 12 ′′.
• the commutator armor according to this example of use is designed such that the armature ring 10 "thus shaped and assembled is hammered into cutouts of the segments 24 ′′ formed in a circular groove 28" and by means of the deformation of the armature of the segments 24 "in the direction towards is additionally attached outside.
• Another advantage resulting from this type of connection of the commutator segments is that no additional tool auxiliary parts have to be used during the casting process of the commutators in order to hold the commutator segments together until the casting.
• FIG. 10 shows an example of use in which the segments 24 "'of a commutator 22'" are alternately composed with intermediate insulation lamellae. Again, the same reference numbers are used, but with ''.
• This commutator armor is intended for commutators that are composed of copper segments and intermediate insulation lamellae. In this type of reinforcement, all three parts of the composite reinforcement ring 10 'are stretched outwards in the radial direction by means of deformation of the anchor elements of the segments 24'".
• the insulation lamellae between the anchors of the segments 24 '" are extended and serve to prevent the Reinforcing ring 10 'returns to the initial position, both the steel ring 12' and the glass fiber ring 14 'being biased radially outwards.
• the reinforcing ring 10 '"assembled for this example of use consists of two steel rings 12"' of rectangular cross section and a glass fiber ring 14 '"arranged between them.
• the special feature here is that the three rings 12 '"and 14"' touch each other or that the supporting part of the glass fiber ring 14 '"is extended on both steel rings 12'", the inner and outer layers or Overhang areas 16 'and 16 "of the glass fiber ring 14" are shifted in opposite directions, in the direction of both steel rings 12'", clasp part of the axile height of the inner shell of one steel ring 12""and the outer shell of the other steel ring 12"".
• the commutator armouring according to this example of use is designed such that the armature ring 10 ′ ′′ shaped and assembled in this way is hammered into sections of the segments 24 a formed in a circular groove 28 ′′ and by means of the deformation of the armature of the segments 24 a in the direction toward is additionally braced on the outside.
• This deformation can be generated either by caulking a notch-shaped groove 27 or by bending.

Landscapes

• Engineering & Computer Science (AREA)
• Manufacturing & Machinery (AREA)
• Motor Or Generator Current Collectors (AREA)
• Adornments (AREA)
• Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
• Wire Processing (AREA)
• Moulding By Coating Moulds (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)
• Absorbent Articles And Supports Therefor (AREA)
• Iron Core Of Rotating Electric Machines (AREA)

Applications Claiming Priority (3)

Publications (2)

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ID=8165827

Family Applications (1)

Country Status (7)

Families Citing this family (9)

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• 1994
  • 1994-02-10 WO PCT/EP1994/000381 patent/WO1995022184A1/fr not_active Ceased
• 1995
  • 1995-02-10 DK DK95909707T patent/DK0693230T3/da active
  • 1995-02-10 EP EP95909707A patent/EP0693230B1/fr not_active Expired - Lifetime
  • 1995-02-10 ES ES95909707T patent/ES2131809T3/es not_active Expired - Lifetime
  • 1995-02-10 WO PCT/EP1995/000495 patent/WO1995022185A1/fr not_active Ceased
  • 1995-02-10 DE DE59505253T patent/DE59505253D1/de not_active Expired - Fee Related
  • 1995-02-10 US US08/535,010 patent/US5736804A/en not_active Expired - Fee Related
  • 1995-02-10 AT AT95909707T patent/ATE177567T1/de not_active IP Right Cessation
• 1998
  • 1998-04-02 US US09/053,902 patent/US6101701A/en not_active Expired - Fee Related

Non-Patent Citations (1)

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