FR2508730A1 - METHOD FOR THE MECHANICAL AND ELECTRICAL CONNECTION OF CONDUCTORS WITH THE COLLECTOR OF AN ELECTRIC MACHINE ARMATURE - Google Patents

Abstract

MANIFOLD INCLUDING AN INSULATING BODY 3 IN MOLDED MATERIAL IN WHICH ARE ANCHORED, BY MEANS OF EXCREATIONS 4 OF THE COLLECTOR BLADES 1 WITH NOTCHES 9 IN WHICH THE CONDUCTORS 8 ARE PREVIOUSLY INTRODUCED, THE PRESSURE BEING OBTAINED BY APPLICATION ELECTRIC BY RESISTANCE USING A WORKING ELECTRODE 12 CHARACTERIZED IN THAT PART 13 OF ELECTRODE 12 COMING IN CONTACT WITH CONDUCTORS 8 IS CONFORMED SO AS TO PRESENT AN ANGLE A, WITH RESPECT TO THE LONGITUDINAL DIRECTION OF THE BACKGROUND 10 NOTCHES, THE TOP OF ANGLE A BEING FACING THE OPPOSITE SIDE TO THE INSULATION BODY 3.

Description

1 -

  METHOD FOR THE MECHANICAL AND ELECTRICAL CONNECTION OF CONDUCTORS

  WITH THE COLLECTOR OF AN ELECTRICAL MACHINE ARMATURE -

  The invention relates to a method for carrying out the

  and electrical conductors with the collector of an in-

  product of an electrical machine, collector comprising an iso-

  lant, of molded material, in which are anchored collectible blades

  trices provided with notches into which the conductors are introduced before the operation of connecting said conductors with the collector. We already know from the French patent 1 369 388 a process in which the connection is obtained by application of mechanical pressure and by electrical heating using an electrode of

  work of which the part coming into contact with the conductors at an in-

  tilt, relative to the longitudinal axis of the sensitive manifold-

  identical to the inclination of the conductors in the notches.

  The plaintiff has found that if such a procedure is used

  thimble for connecting the conductors with a collector whose insulating body has a large volume, with respect to the collecting blades, and whose notches for the passage of the conductors extend over the entire height of the notches of the collecting blades the mechanical pressure exerted by any the surface, of contact, of

  the electrode on the collector blades and on the conductors

  was about The destruction of the quality of the anchoring of the blades co Uec-

  trices in the insulating body and that the fact of reducing this pressure, in order to avoid this destruction, led to a

  unsatisfactory level of quality of the link.

  The object of the present invention is to remedy this drawback

  deny and relates to this effect a method for making a connection of conductors with an armature collector, connection obtained by mechanical pressure and by electric heating using a working electrode, process in which the part of the electrode

  coming into contact with the conductors is shaped so as to pre-

  feel an angle c G (, relative to the longitudinal direction of the bottom of the notches, the top of the angle c> <being placed on the side opposite to the

insulating body.

-2 -

  This process has the advantage of avoiding the application of a pres-

  too high aion on the side where the collector blades are in contact with the insulating body and ensures the quality of the connection by

  application of the necessary pressure to obtain this quality

  lity, in an area where the application of this pressure has no destructive effect on the anchoring of the collecting blades in the

insulating body.

  The following description with reference to the accompanying drawings

  will make it easier to understand how the invention can be realized.

  Figure 1 is a longitudinal view, in partial section, of a collector with the ends of the conductors introduced

  in the notches, the electrode being in the non-working position.

  Figure 2 is a view of the collector of Figure 1, the elect

  trode being in working position.

  Figure 3 is a partial front view of the collector of

Figures 1 and 2.

  Figure 4 is a sectional view of the electrode along the

line M in Figure 2.

  The collector according to FIGS. 1, 2 and 3 and according to a mode

  particular application of the process of the invention is a collection

  tor of the frontal type, of which the collecting blades 1, are obtained

  by a stamping operation leaving ribs 2, weakly

  ble thickness, projecting between two consecutive blades, which ribs are removed during a subsequent operation of

armature finish.

  The collector comprises an insulating body 3 (see fig 1 and 2) made of thermosetting material, in which the collecting blades 1 are anchored by means of protuberances 4 obtained by raising

  of the material of the collecting blades, using a cutting tool.

  These protuberances 4 provided in the central part of the blades

  collectors are embedded in the insulating body 3 during the operation-

tion of molding said body.

  A metal hub 5 secures the manifold to

  the armature shaft (not shown).

  This hub includes an anchoring means 6 also embedded in the

  insulating body 3 during the molding operation.

  The insulating body 3 has at its periphery notches 7 (see fig 1 and 2) for the passage of the conductors 8, which notches extend over the entire height of the notches 9 (see

  fig 1 and 3) in which the conductors 8 are housed.

  The notches 9 are obtained by a milling operation

  collecting blades 1, the bottom 10 of said notches being per-

  pendulum to the face II of the collecting blades (see fig 1 and 2).

  According to the process of the invention, the connection of the

  stripped mites of the conductors 8 and of the collector is produced using a mobile working electrode 12 (see fig 1,2 and 3)

  in translation, of which the part 13 coming into contact with the conduc-

  teurs 8 is shaped so as to have an angle o, relative to the longitudinal direction of the bottom 10 of the notches 9, the top

  de-angle c O being disposed on the side opposite to the insulating body 3.

  The electrode 12 is of trapezoidal section (see fig 4) and

  is cut in Vé, in front view (see fig 3).

  In a known manner, in particular by the French patent 1,369,388, to achieve the connection of the conductors and the collector, mechanical pressure is applied, by means of the electrode 12 on the part of the conductors 8 and of the notches 9 in contact of the face 13 of the electrode 12, an electrically heated electrode, the return to ground of which is ensured, in a conventional manner by a

  electrode 14 (see fig 3) applied to one of the collecting blades

these. -4 -

Claims (1)

-R E V E N D I C A T N-   i. Process for the mechanical and electrical connection of con-   ductors with the collector of an armature of an electric machine, collector comprising an insulating body (3) of molded material, in   which are anchored, by means of protuberances (4),   readers (1) provided with notches (9) into which the conductors (8) are previously introduced, the connection being obtained by application of pressure and electrical resistance heating by means of a working electrode ( 12) characterized in that the part (13) of the electrode (12) coming into contact with the conductors (8) is shaped so as to have an angle c> with respect to   in the longitudinal direction of the bottom (i-O) of the notches, the top of the an-   g OCetant disposed on the side opposite to the insulating body (3).