Stator core having a plurality of connected circumferentially se

Details Stator core having a plurality of connected circumferentially se Stator core having a plurality of connected circumferentially se

1997-02-20

1998-07-28

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310216, 310217, H02K 112

Patent

active

057866511

ABSTRACT:
In a stator core, an intermediate portion of a projection and a groove have respectively formed therein: straight portions extending in a certain width in a direction normal to each end surface of yoke portions; and, near the straight portions closer to end surfaces of yoke portions, contracted portions having a width smaller than the width of the straight portions. When the projection is fit by press fitting into the groove in the normal direction, groove walls on both diametrically outer and inner sides of the groove are deflected within an elastic region. When fit by pressing, the straight and contracted portions of the projection are elastically tightened together at the straight and contracted portions of the groove, respectively. An apparatus for assembling a stator core has a plurality of radially disposed and radially movable jigs for holding the segmented cores. Vertically movable cams are provided vertically downwards on an upper vertically movable plate. By lowering the movable plate, the jigs are pushed radially inwards. By this pushing the plurality of segmented cores circumferentially approach each other. The projection of each segmented core is fit by press fitting into the groove of the adjoining segmented core in the circumferential direction, thereby connecting the segmented cores together.

REFERENCES:
patent: 3826941 (1974-07-01), Folmar
patent: 5256926 (1993-10-01), Hagenlocher et al.
patent: 5583387 (1996-12-01), Takeuchi et al.

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