GB2178002A

GB2178002A - Coil carrier for and production of a multichamber coil

Info

Publication number: GB2178002A
Application number: GB08616284A
Authority: GB
Inventors: Herbert Meyer; Bernd Siedenburg; Manfred Lucks
Original assignee: Licentia Patent Verwaltungs GmbH
Current assignee: Licentia Patent Verwaltungs GmbH
Priority date: 1985-07-20
Filing date: 1986-07-03
Publication date: 1987-02-04
Also published as: DE3526032A1; FR2585173B1; GB8616284D0; GB2178002B; IT1213304B; IT8621136A0; FR2585173A1

Abstract

A coil carrier comprises two flanged coil bodies (10, 11), aligned coaxially, and fastened together at opposed flanges (16, 17) by a hinge (20) and connecting or support means (21) - Figure 1. After winding of the coils onto the bodies, connection (21) is broken and hinge (20) allows the two coil bodies (10, 11) to be pivoted into a position with parallel axes and fastened by engaging means (30, 31) - Figure 3. Electrical connection (27) between the coils is provided at hinge (20). <IMAGE>

Description

SPECIFICATION Coil carrierfor and production of a multichambercoil The present invention relates to a coil carrierfora multichambercoil and a method of producing such a coil.

In a known multichamber coil, for example in a split pole motor according to DE-PS 2730219, outercoil body flanges at the side of a yoke packetare connected together in such a mannerthatthese flanges lie in one plane forthe winding operation, while a device for the fixing ofthe wire portion continuously connecting the excitation windings is provided at the connecting part forthetwo flanges.

Forformation of the windings, the coil bodies, which are connected together by the connecting part, are folded open into parallel planes in such a mannerthat the flanges at the rotor side lie outside. After formation ofthe windings, the coil bodies are pivoted back and plugged onto the pole cores.

Itwould be desirable, however, to be ableto carry outautomaticwinding onto the coil bodies and automaticassemblyofthewound-oncoil bodies on a switching magnet in a simple manner.

According to a first aspect of the present invention there is provided a coil carrier comprising two coaxial coil bodies arranged one afterthe other in axial direction and each having opposite axial endflanges, the two adjacent end flanges ofthe two bodies being arranged parallel to each other and being maintained in parallel relationship by mutual connecting or support means and by a hinge permitting relative pivotal movement of the coil bodies,following elimination oftheconnection orsupportprovided by such means, into positions in which their axes are spaced apart and parallel.

According to a second aspect ofthe invention there is provided a method of producing a multichamber coil, comprising the steps of placing a carrier according to the first aspect ofthe invention on a mandrel, winding a wire around the two coil bodies in succession to form respective windings thereon and to pass from one coil body to the other by way ofthe region ofthe hinge, eliminating the connection or support provided by the connecting or support means and pivoting the coil bodies relative to each other by means ofthe hinge into positions in which their axes are spaced apart and parallel and the length portion of the wire in the region ofthe hinge is substantially relieved oftension.

In a preferred em bodi ment of th e carrier and example ofthe method, the coil bodies, which are arranged in alignment in one plane and lying one aftertheotherin direction oftheirlongitudinal axes, are,forthe purpose of formation ofwindingsthereon, rigidly interconnected at two flanges lying opposite each other and thus form a constructional unit.

Resulting from the rigid mutual connection is a unitary body which facilitates automatic winding with theaidofanautomaticwinding device. The wire transition between the two coil bodies takes place without interruption in the region ofthe hinge. After the wire has been wound around the two coil bodies, the additional fastening point is undone and the coil bodies are each pivoted through 90 relative to the other so that thei r axes now extend parallel to each other. The desired mutual spacing of the coil body axes, which can be matched to the limbs of a U-shaped magnet, is determined by the position of the hinge by which both the coil body flanges originally lying opposite each other are connected together.The undoing ofthe additional fastening point between the flanges, which is preferably formed as a moulded web between the coil bodies produced of plastics material, can be performed automatically without difficulties.

Thefactthatboth coils during thewinding operation lie one afterthe other in axial direction and afterthe winding operation are each pivoted through 90" relative to the other, effects a tension relief ofthe wire which without interruption connects the coil of the one winding space with the coil of the other winding space. The degree of tension relief depends on the thickness of the adjacent flanges ofthe coil bodies, on the position ofthe hinge and on the spacing between those flanges.

Embodiments ofthe coil carrier and examples of the method ofthe present invention will now be more particularly described with reference to the accompanying drawings, in which: Figures 1 and2 aretwo views of a coil carrier embodying the invention,the carrier having two coil bodies which are firmly connected together end on; Figure 3 is a view ofthe carrier of Figures 1 and 2 after a fixed connection has been undone and the coil bodies pivoted; Figures4and 5are views, to an enlarged scale, ofa hinge region of the coil bodies in the positions of Figure 1 and Figure 3; and Figures 6and 7are views, similarto Figures 4 and 5, ofthe hinge region of coil bodies ofanothercoil carrier embodying the invention.

Referring now to the d rawi ngs, there is shown in Figure 1 a coil carrierfora multichambercoil,the carrier comprising two coil bodies 10 and 11 which each havea respectivewinding body13and 14and two respective end flanges 1 5, 16 and 17, 18. The two coil bodies 10 and 11 are arranged one afterthe other in prolongation oftheir longitudinal axis 19so that the winding bodies 13 and 14 lie in one plane and the two flanges 16 and 17 extend parallel to each other.

The coil bodies 10 and 11 consist of plastics material and are rigidly connected together by a double film hinge 20 and by a rigid fastening web 21. The bodies are furnished with windings 22. Atthe mutually remote flanges 15 and 18, the coil bodies have soldering support points 23 and 24forthe fastening ofthe coil wire start 25 and the coil wire end 26. A continuous connection of the coil wire from the one winding to the otherwinding 22 is designated by 27.

Respective inlet slots in the flanges 1 and 17 are designated by28 and 29. The flange 15 at two corners possesses two detent recesses 30 for reception of detentwebs3l,which areformed at corners ofthe flange 18 (Figure 3). Correspondingly,theflange 16 at two corners possesses recesses 32, into which fit projections or strap 33 ofthe adjacent flange 17.

The coil carrier according to Figures 1 and 2 is plugged with plugged-in connections onto a winding mandrel of a winding machine. In that case, the coil body lilies in the direction of the winding table centre. Thereafter, the wire start 25 is introduced into the inlet slot 28 ofthe coil body 10. Afterwinding of thefirstcoil,the coil wire 27 is led without interruption byway ofthe hinge 20 into the inlet slot 29 ofthe second coil body 11 and the second coil is wound. After the winding operation,the web 21 is severed. The two coil bodies 10 and 11 can now be pivoted in directions 34 and 35 respectively each through 90" about the hinge axes 36 and 37 so that they assume the position shown in Figures 3 and 5.In that case, the projections 33 engage in the recesses 32 and the coil bodies 10 and 11 are detented in the recesses 30 by the detent webs 31. Figure 3 shows a U-shaped switching magnet 38, on the limbs of which is plugged the finished multiple coil according to Figure 3. The continuous coil wire 27 is relieved of tension afterthe pivoting ofthe coil bodies 10 and 11 (Figure 5).

In the embodiment according to Figures 6 and 7, the flanges 16' and 17' lie against each other and are articulatedly connected together by a hinge axle 39.

Again designated by 27 is a connecting linewhich, according to Figure 7, is relieved oftension after pivoting ofthecoil bodies.

As is evident from Figures 4 and 5, the distance 40 between each hinge axis 36 and 37 and the neighbouring flange edge is in this mode of construction equal to half the spacing 41 ofthe flanges 16 and 17 disposed opposite each other.

Designated by42 and 43 are two mutually parallel planes in which the coil axes now extend according to Figures 3, and 7.

Claims

1. A coil carrier comprising two coaxial coil bodies arranged one afterthe other in axial direction and each having opposite axial end flanges, the two adjacent end flanges ofthe two bodies being arranged parallel to each other and being maintained in parallel relationship by mutual connecting or support means and by a hinge permitting relative pivotal movement of the coil bodies, following elimination of the connection or support provided by such means, into positions in which their axes are spaced apart and parallel.

2. A carrier as claimed in claim 2, said means comprising at leasttwo connecting webs.

3. Acarrierasclaimed in eitherclaim 1 orclaim 2, wherein the hinge is provided by a film member flexibly connected at a hinge axis to each of said two end flanges.

4. A carrier as claimed in claim 3, wherein the hinge axes are disposed atthe outer end faces of said two end flanges and the distance between each hinge axis and adjacent edge ofthe associated flange is equal to substantially half the distance between those flanges.

5. A carrier as claimed in any one ofthe preceding claims, wherein theflanges are provided with passage meansforthewire of coil windings.

6. Acarrieras claimed in claim 1,wherein said two end flanges lie against each other and the hinge defines a hinge axis disposed in a plane of contact of the flanges.

7. A carrier as claimed in any one ofthe preceding claims, wherein the flanges are provided with detent means for interconnecting the flanges with the coil bodies disposed in said positions.

8. Acarrierasclaimed in any one ofthe preceding claims, wherein one of said two end flanges is provided with a recess arranged to be covered bythe hinge when the coil bodies are disposed in said positions and the other one of said two end flanges has passage means forthe wire of coil windings.

9. A coil carrier substantially as hereinbefore described with reference to Figures 1 to 5 ofthe accompanying drawings.

10. A coil carrier substantially as hereinbefore described with reference to Figures 6 and 7 of the accompanying drawings.

11. Amethod of producing a multichambercoil, comprising the steps of placing a carrier as claimed in any one of the preceding claims on a mandrel, winding a wire around the two coil bodies in succession to form respective windings thereon and to pass from one coil body to the other by way ofthe region ofthe hinge, eliminating the connection or support provided by the connecting or support means and pivoting the coil bodies relative to each other by means of the hinge into positions in which their axes are spaced apart and parallel and the length portion of the wire in the region of the hinge is substantially relieved oftension.

12. A method as claimed in claim 11 and substantially as hereinbefore described with reference to Figures 1 to 5 of the accompanying drawings.

13. A method as claimed in claim 11 and substantially as hereinbefore described with reference to Figures 6 and 7 of the accompanying drawings.