Patent ID: RE39416

Claim:
A structure of rotor for an outer rotor type brushless motor, comprising: a steel plate frame including: a base plate unit in a disc shape having: a plurality of insertion holes at its center portion; a plurality of radiation holes being formed at a circumferential portion of the insertion holes; a plurality of radially extending blades being formed at side portions of the radiation holes by cutting; a connection guide unit being protrusively formed adjacent a circumferential portion of a shaft insertion hole of the plurality of insertion holes; a plurality of enhancing ribs which are longitudinally embossed in a radial direction formed in intermediate between a center and an outer edge thereof; a back yoke unit curved at the edge portion of the base plate unit and formed integrally therewith and extended in the upward direction, having a predetermined height at an outer circumferential portion of the base plate unit; and a radius-direction enhancing unit formed radially extending outwardly at an upper end portion of the back yoke unit; one or a plurality of ring type permanent magnets fixedly connected to the inner side portion of the back yoke unit; a connecting member inserted into the shaft insertion hole of the plurality of insertion holes positioned at the center, and connected to the steel plate frame by a fastening member; and a fixing unit fixing a driving shaft inserted into the connecting member which connected to the other constitution elements.