Means for holding the end turns of electric motor stator windings
AssigneeEmerson Electric Co.
InventorAdriano Magnaghi
Life of this patent
Estimating the term…
Abstract
Means for holding the end turns of the stator windings of an electric motor or the like in place comprising a first unitary molded plastic member adapted to be placed on the inside of the windings and having a plurality of arms or web members spaced there-around which are adapted to extend at least in part over a portion of the inner surface of the windings, around the ends of the windings, and over a portion of the outer surface of the windings. A retainer ring is forceably installed over the outside of the web members so as to draw the web members into firm engagement with the windings and to positively hold the windings secure. A method of securing the windings is also disclosed.
Claims19
Means for holding end turns of the stator windings of a dynamoelectric machine in a desired position or arrangement, said end turns being arranged in a generally circular pattern around the longitudinal centerline of the dynamoelectric machine when viewed from the end of the latter, said means comprising a holding member having an inner portion adapted to fit on an inner surface of the end turns, a plurality of web members extending from said inner portion and being adapted to be wrapped around the outer ends of the end turns of the windings and at least partially around the outer surfaces of the windings, and a securement member separate from said holding member and adapted to fit over said web members on the outside of the web members and on the outside of the end turns of the windings for securely holding the web members against the end turns.
Means for holding the end turns of the stator windings of a dynamoelectric machine in a desired position or arrangement, said end turns being arranged in a generally circular pattern around the longitudinal centerline of the dynamoelectric machine when viewed from the end of the latter, said means comprising a holding member having an inner portion adapted to fit on an inner surface of the end turns, a plurality of web members extending from the inner portion and being adapted to be wrapped around the outer ends of the end turns of the winding and at least partially around the outer surfaces of the windings, and a securement member adapted to fit over said web members on the outside of the web members and on the outside of the end turns of the windings for securely holding the web members against the end turns, said securement means being arranged having an inner diameter of such size that the ring fits snugly on the outside of said web members thereby to hold said web members in secure holding relation on said end turns, said means further comprising means on the outer surface of at least some of said web members and on the inner surface of said ring for interengagement between said last mentioned web members and said ring whereby to secure said ring on said holding member, said interengagement means comprising at least one inwardly protruding flange on the inner surface of said ring and at least two outwardly protruding, spaced ribs on the outer surface of some of said web members thereby to form a detent groove therebetween so that upon placing said ring on the outside of said web members, said flange and groove cooperate to hold said ring on said web members.
A device for holding a plurality of end turns of the stator windings of a dynamoelectric machine, said end turns being arranged in what may be generally referred to as a circular pattern as viewed from the end of said machine, said device comprising a first member having an inner ring adapted to fit on the inner surfaces of said end turns, a plurality of web members integral with and extending from the inner ring, said web members being of a length sufficient to extend from said inner ring along a portion of the inner surface of said end turns, around the outer ends of said end turns, and around a portion of the outer surfaces of said end turns, and a retaining ring separate from said first member adapted to be fitted endwise onto said end turns and to bear against the outer surface of said web members thereby to securely hold the web members on the end turns and to securely hold the wires of said end turns in place.
In an electric motor or other dynamoelectric apparatus having a stator assembly including a stator core comprising a stack of laminations, said core having a bore therethrough and a plurality of coils of wire constituting stator windings inserted in slots provided in said core with the ends of the coils, referred to as end turns, extending out beyond the faces of said stator core and being arranged in a substantially circular path, as viewed from the end of the stator core, generally concentric with said stator bore, wherein the improvement comprises:
- means for holding said end turns comprising a holding member having an inner portion adapted to fit on the inner surfaces of said end turns, a plurality of web members extending from said inner portion so as to extend around at least in part a portion of the adjacent end turn, and a securement member adapted to fit over said web members and said end turns for securely holding said web members adjacent the outer surfaces of said end turns.
Dependencies are inferred from the claim text.