| 摘要 |
The invention relates to a hydraulic pump unit with an electric drive motor and a radial piston pump that is provided as a return feed pump for a motor vehicle for a slip-regulated, hydraulic brake system. To drive the pump pistons, the invention provides a rod-shaped eccentric element that is supported eccentrically with ball heads in a shaft end of a drive shaft of the drive motor and disposed on an opposite side of the pump pistons in a pump housing is supported so that the eccentric element can swivel around a solid angle. When the drive shaft is rotated, the eccentric element executes a movement on a surface of a cone so that the pump pistons resting against the eccentric element are driven in a reciprocating stroke motion. The invention has the advantage of a mechanically defined bearing support of the drive shaft and eccentric element so that the bearing of the eccentric element, which bearing is fixed to the housing, does not have to be exactly flush with the drive shaft.
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