| 摘要 |
The present invention relates to a drive unit (10) for driving at least one hydraulic piston pump, which has a piston (12), of a vehicle brake system, having a motor shaft (26) which can be driven in rotation, having an eccentric (24), which is attached to the motor shaft (26), for converting the rotational movement of the driven motor shaft (26) into a translatory movement of the piston (12), and having a bearing (28) which is attached to the eccentric (24). In order to avoid transverse forces which result from the eccentricity and act on the pump piston (12) which is to be driven, the drive unit (10) has an element (18) which absorbs transverse forces, by means of which the transverse forces which are transmitted by the eccentric (24) and act at right angles to the longitudinal axis of the piston (12) are absorbed, wherein the element (18) which absorbs transverse forces is guided so as to be longitudinally moveable in the direction of the longitudinal axis of the piston (12) and is arranged at least partially between the bearing (28) and the piston (12).
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