Electric motor e.g. for valve drive in motor vehicle, has casing with inner chamber reliably sealed against an outer chamber with seal in a stepped borehole and a rotor with a shaft to run on bearings.

摘要

An inner chamber has a rotor that has a shaft (24) and runs on bearings (34). The inner chamber is reliably sealed at one point against an outer chamber. A stepped borehole (38) holds a seal (40), through which the rotor's shaft protrudes from a casing. The stepped borehole has a first diameter (46) with a first size (48) as well as a second diameter (50) with a second size (52). The first size is greater than the second.