Patent ID: 8519588

Claim:
Permanent-magnetic rotor ( 2 ) for an electric motor, preferably for an internal rotor motor, which has a sheet-metal package ( 3 ) composed of multiple rotor sheets ( 4 , 4 ′, 5 ) stacked in the axial direction, whereby permanent magnets ( 8 ) are disposed in accommodation pockets ( 7 ) formed by recesses ( 6 ) of the rotor sheets, wherein the magnets ( 8 ) are oriented essentially tangentially, wherein the sheet-metal package ( 3 ) is composed of at least two rotor sheet types ( 4 , 4 ′, 5 ) that have different shapes, whereby on the one hand, multiple rotor sheets ( 4 , 4 ′) of a first rotor sheet type are provided as holder sheets ( 4 , 4 ′), which have a central yoke sheet section ( 13 ), in each instance, which section is connected or can be connected with the rotor shaft, and have one or more outer pole-shoe sections ( 12 ), in each instance, which are connected with the yoke sheet section ( 13 ) by way of one or more connection crosspieces ( 9 , 9 ′, 10 ) or crosspiece sections ( 9 , 10 ), whereby on the other hand, multiple rotor sheets ( 5 ) of a second rotor sheet type are provided as intermediate sheets ( 5 ), without any connection crosspieces, wherein the intermediate sheets ( 5 ) are configured in multiple parts and consist of multiple separate sheet sections ( 5 a , 5 b ), wherein the multi-part intermediate sheets ( 5 ) have at least one central yoke sheet part ( 5 a ) that is connected or can be connected with a rotor shaft, and have one or more separate pole-shoe parts ( 5 b ) on the outer circumference side, and wherein the yoke sheet parts ( 5 a ) of the intermediate sheets ( 5 ) have one or more installation projections ( 17 ), which are formed onto the yoke sheet parts ( 5 a ) on the outer circumference side and are oriented radially toward the outside.