Patent ID: 8541917

Claim:
A stator assembly structure of a rotary electrical machine for assembling a stator on a case, comprising: the stator including a stator holder that has a cylindrical shape and a stator core retained at an inner peripheral surface of the stator holder, the stator holder including a flange portion that extends in a radially outward direction from one axial end of the stator and that includes a plurality of positioning bores arranged at intervals in a circumferential direction of the stator, the stator holder further including a fixing portion fixing the stator to the case; the case including a positioning pin having an outer diameter smaller than a diameter of each of the positioning bores of the flange portion, the positioning pin being engageable with each of the positioning bores, the case further including a fixing seat fixing the fixing portion of the stator holder; and each of the positioning bores of the flange portion of the stator holder including at least three bending portions that extend from a peripheral edge of the positioning bore towards a radially inward side, each of the bending portions being formed to be bent at a portion in a length direction from the peripheral edge towards the radially inward side relative to the flange portion.