Double internal gear wheel pump

Abstract

A double internal gear wheel pump includes two internal gear wheel pumps configured as hydraulic pumps of a hydraulic, slip-controlled vehicle braking system. The double internal gear wheel pump further includes a partition wall that is arranged between both internal gear wheel pumps. The partition wall is configured as a single-piece component of a pump housing, preferably formed by a hydraulic block of the vehicle braking system.

1 . A double internal gear wheel pump, comprising:
 two internal gear wheel pumps having a common pump shaft:   a pump casing; and   a partition wall arranged in the pump casing between the two internal gear wheel pumps   wherein the partition wall is an integral part of the pump casing.   
     
     
         2 . The double internal gear wheel pump as claimed in  claim 1 , wherein the pump casing is formed by a hydraulic block of a hydraulic vehicle brake system, the block interconnecting the internal gear wheel pumps hydraulically with other hydraulic components of the vehicle brake system. 
     
     
         3 . The double internal gear wheel pump as claimed in  claim 1 , wherein the two internal gear wheel pumps have crescents with a common abutment passing through the partition wall. 
     
     
         4 . The double internal gear wheel pump as claimed in  claim 1 , wherein a pump port passes through the partition wall and opens into one of the internal gear wheel pumps, and wherein a pump valve is inserted into the pump port. 
     
     
         5 . The double internal gear wheel pump as claimed in  claim 1 , wherein the pump shaft has a shaft bearing simultaneously forming a motor bearing for a drive motor of the double internal gear wheel pump.