Fluid pump

Abstract

There is proposed an embodiment of an electric fluid pump of a semi-axial design wherein support ribs ( 31 ) are arranged between a radially outer pump housing portion ( 32 ) and a first, radially inner motor housing portion ( 8 ) that radially surrounds the electric motor ( 1 ), wherein the radially outer pump housing portion ( 32 ) is formed integrally with the first motor housing portion ( 8 ) and the support ribs ( 31 ). In this manner, as compared to previously known embodiments, small wall thicknesses of the pump housing can be realized because the support ribs will offer sufficient strength. Thus, the number of component parts and the weight can be reduced.

1 . A fluid pump for internal combustion engines, comprising:
 an electric motor including a rotor arranged in a motor housing, and a stator, wherein the rotor is arranged at least on a drive shaft for common rotation therewith; an impeller fastened to the drive shaft;   at least one guide wheel arranged downstream of the impeller in a flow direction of fluid to be conveyed; and   a pump housing surrounding the motor housing, the impeller and the guide wheel, wherein the pump housing is provided with a pressure socket and an intake socket arranged opposite the pump housing on axial ends, and   support ribs are arranged between a radially outer pump housing portion and a first, radially inner motor housing portion that radially surrounds the electric motor, wherein   said radially outer pump housing portion is formed integrally with said motor housing portion and the support ribs, wherein   the support ribs are shaped so that the support ribs serve as a guide wheel of the fluid pump, and the support ribs have a width so that an electric contact element is guidable from an electronics unit to a stator winding via a bore formed in one or a plurality of the support ribs.   
     
     
         2 . The fluid pump for internal combustion engines according to  claim 1 , wherein that the radially outer pump housing portion is of a cylindrical shape. 
     
     
         3 . The fluid pump for internal combustion engines according to  claim 1 , wherein that a suction-side pump housing portion flaring in the flow direction is formed integrally with a housing portion of a valve arranged upstream thereof. 
     
     
         4 . The fluid pump for internal combustion engines according to  claim 1 , characterized in that the first motor housing portion is arranged to delimit the electric motor on the suction side. 
     
     
         5 . The fluid pump for internal combustion engines according to  claim 2 , wherein a suction-side pump housing portion flaring in the flow direction is formed integrally with a housing portion of a valve arranged upstream thereof. 
     
     
         6 . The fluid pump for internal combustion engines according to  claim 2 , characterized in that the first motor housing portion is arranged to delimit the electric motor on the suction side. 
     
     
         7 . The fluid pump for internal combustion engines according to  claim 3 , characterized in that the first motor housing portion is arranged to delimit the electric motor on the suction side.