US Patent 7586228 Stator of an electric motor

The invention relates to a stator of an electric motor, comprising a laminated stator core (1) which is provided with electrical insulation (8) composed of plastic, and a stator bushing (3) which can be pressed into a central axial opening (2) in the laminated stator core (1), forms a bearing seat for a rotor shaft (10) and is composed of metal. In order to reduce the manufacturing complexity, with the aim at the same time to reduce the amount of noise developed and to improve the electrical insulation of the bearing seat, the invention proposes that the laminated stator core (1) and the metallic stator bushing (3) which is pressed into the laminated stator core (1) are at least partially surrounded by a extrusion coating (8), which is composed of plastic and forms the insulation (8).