FR2466896A1 - METHOD FOR IMMOBILIZATION OF INDUCER SPIERS AND INDUCER THUS OBTAINED - Google Patents

Abstract

This method is more particularly applied to motor vehicle starters and it consists in that the inductor coils 1 are bent beforehand then subjected to the installation of the adhesive 4 first on one face 5, then on the other. face 11 and finally immersed in a bath of plasticizer coating them. (CF DRAWING IN BOPI)

Description

-1 - Method of immobilization of inductor turns and inductor

thus obtained.

  The present invention relates to a method for immobilizing spindles

  electric machine inductor coil conductor coils and inductors obtained by the method, especially for starters

of motor vehicles.

  The inductors of electric starters known today, consist of coils which are of appropriate shape to the dimensions of the polar masses, and whose turns of conductors in flat wire

  are isolated from each other by paper insulation, or otherwise, and

  held together by an adhesive tape. The reels thus obtained

  are then shaped to fit the inner shape of the car-

  breaks the machine around the polar masses, then submerged in a plasticizing bath which, after polymerization, ensures the permanent maintenance. This sometimes results in a rupture of the adhesive tape.

  reels and consequently a noticeable increase in

  said coils. It then becomes impossible to

  tighten the tie rods of the machine between two consecutive windings. The object of the present invention is to overcome such drawbacks and for this purpose concerns a method of immobilizing the conductor turns forming induction coils of electrical machines.

  particular for starters of motor vehicles whose inductive

  are made of coils made from

  flat duct in a form appropriate to the dimensions of the masses

  polar and conformed to fit the inner shape of the car-

  breakage of the electric machine around the polaizes masses, and

  the turns are insulated between them by an insulating tape and now

  by an adhesive, before immersion in a bath of plasticizer,

  characterized in that the coils are previously cam-

  bred in the shape of their support and then subjected to the following adhesive tape operations:

  Continuous laying on the outer face of a plurality of bobbins

nes, ribbon tape.

2 -

  Cutting of the adhesive between two consecutive coils, and inside

  coils using knives.

  Bonding of the free ends of the adhesive to the flanks of the

  rolls by folding them with the help of elastic fingers which are inserted between the sides of the coils and the knives.

  After release of the knives and elastic fingers the last

  the free ends of the adhesive are folded back to

  ge on the internal faces of the coils.

  These various operations are then repeated on the

reels.

  A set of four coils thus produced forming an inductor.

  The following description as well as the attached diagrams will better

  understand what the invention is.

  Fig. 1 represents a coil with immobilized turns according to

the invention.

  Fig. 2 represents the range of the method of immobilization of

  between them according to the invention, according to section II-II of the

Fig. 1.

  The starter inductors consist essentially of coils such as that shown in FIG. 1. This coil consists of the winding of a conductive wire 2, such as aluminum; this wire 2 is a rectangular section wire,

  the different turns of this wire 2 are isolated between them to help

  of a ribbon. insulator 3 which may be paper; The turns are

  held tightly together with adhesive tape 4.

  These coils are arched in a shape such that the upper surface is

  re 5 marries the inner shape of the starter housing.

  The process according to the invention which makes it possible to obtain such boosters

  bines consists in that the coils 1 are initially arched according to the desired firmness of their face 5, then subjected to the installation of the adhesive tape 4 which is carried out in the following manner with regard to

of Figure 2.

  The first step consists, according to FIG. 2a, of laying the adhesive 4 on a plurality of coils continuously mechanically with the aid of a roll 6 which remains in contact with the upper face 5 of the coils.

  coils by vertical displacement while the coils are

kill a horizontal displacement.

-3 -

  The superfluous parts of the adhesive 4 located in the central part

  the 7 of the reel and between two reels are then cut to the aid

  of slanted knives 8 (according to Fig. 2b) and then pressed against the flanks of the various coils b using elastic fingers 9 (according to Fig. 2c). The cutting blades of the knives are inclined relative to the surface of the adhesive to obtain, by a simple push

axial a clear cut and frank.

  The inclined knives 8 and the elastic fingers 9 are then de-

  plicated, and the free ends 10 of the adhesive 4 are then

  plicated against the inner curve 11 of the coil using a

  roller 12 whose displacement is coa.xial to the curvature of the bo-

bine (according to Fig. 2 d).

  The following operations are then performed on the inside face 11 of the spool 1 as shown in FIG.

  is placed continuously on the inner face of the baby to help

  of a roll 13, the cutting and application operations are

  then carried out in order to obtain coils according to FIG. 2 f, qa-

  be coils conecu'ives reé.lsant wenceusenc in; eu de bobi-

of inductors of a starter.

  This method has had the advantage of facilitating the mechanization of the laying of the ruben cdb {sif 4 and the idea of arching the bobbins at the beginning avoids any possibility of rupture of said adhesive 4 when it is laid down, and ensures In this way, the reels 1 and the reels are well modified so that they can be modified, such as in the movements of the rollers 6, 12, 73, for example, that are intended to be outside the scope of the invention. ; and that a set, of which it will be possible, will be dissolved in a bath of plaster, so as to produce the inducing assembly of a

electric machine.

-4 -

Claims (1)

R e v e n d i c t i o n s   1 - Method of immobilization of conductor turns forming   inductor coils for electrical machines, it is necessary to start   motor vehicles having inductors consisting of coils made from a flat conductor wire in a shape appropriate to the polar and shaped masses   to fit the inner shape of the frame of the electric machine   around the polar masses, and whose turns are isolated by an insulating tape and held by an adhesive, before immersion in a bath of plasticizer, characterized in that the coils are previously arched according to the shape of their support and subjected to the following tape-laying operations:   Laying continuously on the outside of a plurality of bobbins nes, ribbon tape.   15. Cutting of adhesive between two consecutive coils, and within the coils c the aidcouteaux.   Bonding of the free ends of the adhesive to the flanks of the   spools by folding them with the help of elastic fingers which   are inserted between the flanks of the coils and the knives.   20. After releasing knives and elastic fingers the last   the free ends of the adhesive are repacked for gluing on the internal faces of the coils.   These various operations are then repeated on the inside face. re reels.   - Electric machine inductor obtained by the following method   1, characterized in that it consists of four coils made according to said method, which after this   precedes are coated with plasticized plasticizer.