Pump Assembly

Abstract

A pump assembly as a feedback pump of a hydraulic, slip-controlled vehicle brake system having a piston pump and an electric motor for driving it is disclosed. The electric motor is embodied as an external rotor and the stator is mounted on a printed circuit board which has an electronic system for commutating the electric motor and/or for performing slip control of the vehicle brake system.

What is claimed is: 
     
         1 . A pump assembly for a hydraulic vehicle brake system, comprising:
 a pump; and   an electric motor configured to drive the pump,   wherein the electric motor has a rotor, a stator, and a printed circuit board, and   wherein the stator is mounted on the printed circuit board.   
     
     
         2 . The pump assembly according to  claim 1 , wherein the stator has coils which are mounted on the printed circuit board. 
     
     
         3 . The pump assembly according to  claim 1 , wherein the electric motor is an external rotor. 
     
     
         4 . The pump assembly according to  claim 3 , wherein the rotor is coaxial and rigid with a shaft of the pump. 
     
     
         5 . The pump assembly according to  claim 1 , wherein the rotor of the electric motor is rotatably mounted in the pump. 
     
     
         6 . The pump assembly according to  claim 1 , wherein:
 the pump has eccentric gearing with a transmission shaft, a bearing ring which is mounted on rolling bearings on the transmission shaft and roller bodies which are arranged in a gap between the transmission shaft and the bearing ring, and   the bearing ring is arranged eccentrically with respect to the transmission shaft, and the roller bodies have different diameters corresponding to a different gap width between the transmission shaft and the bearing ring.   
     
     
         7 . The pump assembly according to  claim 1 , wherein the pump is a piston pump.