Patent ID: 8803389

Claim:
A stator comprising: a stator core formed from a plurality of split cores arranged in a circumferential direction, the stator core having a top surface and an opposite bottom surface; a cylindrical body that surrounds the stator core from a periphery and secures the stator core, the cylindrical body has a cylinder main body having a first cylinder end, an opposite second cylinder end, and a flange portion that extends radially from the first cylinder end, the cylinder main body is formed such that a radius of the second cylinder end gradually increases from the cylinder main body adjacent the bottom surface of the stator core, said second cylinder end curves outwardly at a position beyond said bottom surface of said stator core; and a buffer portion that absorbs an effect that rigidity of the flange portion would have on the cylinder main body, the buffer portion positioned on the cylinder main body between the bottom surface and the top surface of the stator core, the buffer portion configured such that an interior surface of the buffer portion is spaced apart from the periphery of the stator core adjacent said top surface of said stator core, the buffer portion is formed such that a radius of at least a portion of the buffer portion gradually increases from the cylinder main body towards the flange portion, wherein: the split cores each have a first end portion on one end in the circumferential direction, and a second end portion on the other end in the circumferential direction; the first end portion has a protruding portion that protrudes outward in the circumferential direction; the second end portion has a depressed portion that is depressed inward in the circumferential direction and fits together with the protruding portion of the first end portion of an adjacent split core.