Internal Gear Pump for a Hydraulic Vehicle Braking System

Abstract

The disclosure relates to an internal gear pump for a slip-regulated hydraulic vehicle braking system, comprising one pressure piece on either side of the gear wheels of said pump. According to the disclosure, a disk consisting of wear-resistant material is arranged between the pressure piece and the gear pump. The pressure pieces can be manufactured from plastic to reduce costs.

1 . An internal gear pump for a hydraulic vehicle braking system, comprising:
 an internal gearwheel; and   an external gearwheel which is arranged eccentrically in the latter and which meshes with the internal gearwheel, and   a thrust piece which is arranged fixedly in terms of rotation on one end face of the external gearwheel and of the internal gearwheel,   wherein a disk having high wear resistance is arranged fixedly in terms of rotation between the thrust piece, on the one hand, and the external gearwheel and the internal gearwheel, on the other hand, and seals off the gearwheels on the end face.   
     
     
         2 . The internal gear pump as claimed in  claim 1 , wherein the disk is composed of metal and/or the thrust piece is composed of plastic. 
     
     
         3 . The internal gear pump as claimed in  claim 1 , wherein the internal gear pump has a thrust piece and a disk on each end face of its gearwheels. 
     
     
         4 . The internal gear pump as claimed in  claim 1 , wherein a pump inlet or a pump outlet is cut out from the thrust piece and/or the disk. 
     
     
         5 . The internal gear pump as claimed in  claim 1 , wherein the disk has grooves on its side facing the gearwheels, in the region of teeth of the gearwheels. 
     
     
         6 . The internal gear pump as claimed in  claim 1 , wherein the thrust piece has a shaft bearing for a pump shaft of the internal gear pump. 
     
     
         7 . The internal gear pump as claimed in  claim 1 , wherein the internal gear pump is a double pump with two internal gear pumps which have a common pump shaft. 
     
     
         8 . The internal gear pump as claimed in  claim 7 , wherein the double pump has a common thrust piece between the two internal gear pumps.