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Stator core having a plurality of connected circumferentially segmented cores and method and apparatus for assembling same
| Details |
Inventors: Suzuki, Tetsuo;
Assignee: Honda Giken Kogyo Kabushiki Kaisha (Tokyo, JP)
Primary Examiner: Stephan; Steven L.
Assistant Examiner: Imayoshi Tamai; Karl E.
Attorney, Agent or Firm: Armstrong, Westerman, Hattori, McCleland & Naughton
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. |
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DETAILED DESCRIPTION In order to attain the above-described first object, the present invention is a stator core having a plurality of circumferentially segmented cores, each of the segmented cores having a projection and a groove on circumferential one end and the other end, respectively, of a yoke portion thereof.
The segmented cores are assembled to form a stator core by circumferentially connecting the plurality of segmented cores by fitting a projection in one of adjoining segmented cores into a groove in the other of the adjoining segmented cores.
The stator core is characterized in that: a straight portion is formed in an intermediate portion of each of the projection and the groove, the straight portion extending straight in a predetermined width in a normal direction which is normal to each end surface of the yoke portion; that a front end portion of the projection and an inner bottom portion of the groove are formed into a semicircular shape having a diameter equal to a width of the straight portion; and that a contracted portion which adjoins the straight portion and has a width smaller than the width of the straight portion, and an enlarged width portion which extends in width from the contracted portion towards each end surface of the yoke portion are formed in those portions of the projection and the groove which are respectively closer to each end surface of the yoke portion; such that, when the projection is fit by press fitting into the groove in the normal direction, the contracted portion of the groove is enlarged in width within an elastic region of groove walls on diametrically outer side and inner side, respectively, of the groove to thereby allow the straight portion of the projection to pass therethrough and, that once the straight portion of the projection has passed through the contracted portion of the groove, the straight portion and the contracted portion of the groove are brought into forced contact with the straight portion and the contracted portion of the projection, respectively
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Generators or Motors 
