Patent ID: 9748808
Date: 2017-08-29
CPC Classifications: H02K

Claim:
1. A rotor core for an electrical motor rotating with a rotational axis includes a central opening to take up a shaft of the electrical motor rotating around the rotational axis, with the central opening having a peripheral edge with at least: one attachment section, designed for attachment of the rotor core on the shaft by press fit, with the at least one attachment section forming a protrusion towards the rotational axis at the peripheral edge; and one centering section; wherein the at least one centering section and the at least one attachment section are placed in different sections of the peripheral edge in circumferential direction, with the at least one centering section being formed as a section of the peripheral edge that is essentially tangential to the outer diameter of the shaft with an attachment radius of the attachment section being essentially the same as a centering radius of the centering section, wherein the attachment radius corresponds to a smallest distance between the rotational axis and the attachment section and the centering radius corresponds to a smallest distance between the rotational axis and the centering section.