Dynamoelectric machine stator assembly

Claim 1

A dynamoelectric machine stator core assembly comprising a stack of generally flat, insulated metal laminations arranged in mutually facing relationship to define a bore for receiving a rotor adapted to be mounted within the bore in rotatable relationship to the stator, first and second annular clamping flanges mounted, respectively, over opposite ends of said stack with an inner portion of each flange overlapping the stack, and with an outer portion of each flange extending radially outward beyond the outer peripheral surface of the stack, a plurality of tension bars arcuately spaced around said peripheral surface of the stator, the ends of each of said tension bars being affixed, respectively, to said outer portions of the respective flanges thereby to hold said flanges in clamping relationship to the stack of laminations, in combination with the improvement comprising: a. a plurality of torque ribs each being about equal in length to one of said tension bars, and each being generally V-shaped in cross-section over its entire length, with a key portion defined by the outer surface of the apex thereof, b. a plurality of arcuately spaced positioning means defined on the outer peripheral surface of said stack, each of said positioning means being effective to engage therewith one of said torque rib key portions, thereby to prevent relative movement between the key portion and an adjacent positioning means, c. the ends of each of said torque ribs being mounted, respectively, in fixed relationship to the outer portion of the respective clamping flanges, and the key portions of each of the torque ribs being positioned, respectively, in engagement with one of said positioning means, thereby to rigidly and tightly secure the stator laminations against rotation relative to said flanges.