MY127708A - Commutator with reinforcing ring - Google Patents

Abstract

THE INVENTION PERTAINS TO A COMMUTATOR (10) WITH COPPER SEGMENTS (26) EMBEDDED IN PLASTIC (12), WHEREIN AT LEAST ONE SURFACE ENGAGES A RECEPTACLE (15) ON A REINFORCING RING (16) ARRANGED COAXIALLY WITH THE AXIS OF ROTATION (14) OF THE COMMUTATOR, WHICH CONSISTS OF A METAL RING (18) OF RECTANGULAR CROSS SECTION AS WELL AS AN INSULATING RING (20) OF RECTANGULAR CROSS SECTION ASSEMBLED TO THE METAL RING (18), WHEREIN THE INSULATING RING (20) CONSISTS, FROM THE INSIDE OUT, AS VIEWED IN THE AXIAL DIRECTION, OF A SUPPORT PIECE (22) AS WELL AS A CENTER-OR FLANGE-PIECE (24) ATTACHED TO IT RADIALLY OUTWARD AND AXIALLY DISPLACED, BOTH OF THEM FORMED TOGETHER AND EXHIBITING A STEP FORM. MOREOVER, THE METAL RING (18) IS FITTED INTO THE STEP-FORM OF THE INSULATING RING (20) IN SUCH A WAY, THAT A PART THE RADIAL OUTER SURFACE OF THE METAL RING (18) IS ADJACENT TO THE RADIAL INNER SURFACE OF THE FLANGE-PIECE (24), AND THE INNER SURFACE OF THE METAL RING (18) COMPLETELY ADJOINS THE OUTER SURFACE OF THE SUPPORT PIECE (22). THE REINFORCING RING (16) THEREBY FORMS A MULTIPLE REINFORCING SYSTEM IN SUCH A WAY THAT THE METAL RING (18) AND THE SUPPORT PIECE (22) OF THE INSULATING RING (20) ARE SPATIALLY SEPARATED AND INDEPENDENT OF EACH OTHER, EACH BEARING ON ITS AXIAL DIMENSION THE LOAD FROM THE ARMATURE RETAINER (28) WHICH IS CAUSED BY THE CENTRIFUGAL FORCE OF THE COPPER SEGMENTS (26), WHEREIN A FIRST PART (A) OF THE RADIAL OUTER SURFACE OF THE ARMATURE RETAINER (28) BEARS AGAINST THE METAL RING (18) THROUGH A HIGHTEMPERATURE, COMPRESSION-RESISTANT PLASTIC (12), AS VIEWED FROM THE OUTSIDE IN, IN THE AXIAL DIRECTION, WHEREAS A SECOND PART (B) OF THE RADIAL OUTER SURFACE OF THE ARMATURE RETAINER (28), ATTACHED TO IT AXIALLY INWARD, INDEPENDENTLY SUPPORTS THE SUPPORT PIECE (22) OF THE INSULATION RING (20). (FIG. 1)