Vane pump with unilateral bearing

摘要

The invention relates to a motor-driven vane pump, and in particular to vane pumps for generating a vacuum used to operate a secondary unit of an automobile. The vane pump comprises a cast approximately bell-shaped pump housing in which a rotor is eccentrically supported. The rotor is rigidly connected with and driven by a rotor shaft, and carries a plurality of sealing vanes slidably mounted in guide slots provided along its periphery. A rotationally symmetrical driving bell surrounds the pump housing with play, and is rigidly connected with the rotor shaft, which sealingly passes through the bottom of the pump housing. The rotor shaft is thus supported on only one side in the housing cover which closes off the end of the pump housing opposite the chamber bottom.