ELECTRONICALLY CONTROLLED LINEAR PUMP DRIVE ACTUATOR

摘要

Electronically controlled linear pump drive actuator for operating a dispensing pump comprising: - a servo motor unit that has: - a stator with a central hollow cavity; - a rotor extending coaxially in the hollow cavity of the stator with a front portion that has a central bore open at the front end; and a rear shaft with a stepped diameter forming a rear extension of the front portion; - respective front and rear support members attached to the front and rear faces of the stator; - a support bearing in the rear support member designed to take and resist substantial axial loads; - a front bearing; and - a position sensor; - a ball screw drive mechanism with a ball screw nut and a ball screw shaft, the ball screw nut is arranged in and attached to the rotor; - a hollow cylinder attached to a front end of the front support member that extends in forward direction; - an actuator member guided for axial movement in the hollow cylinder and has a central rear part fixed to a front end section of the ball screw shaft, and a hollow front part; - a pump plunger adaptor fixed in the hollow front part of the actuator member for releasable attachment of a plunger element of the dispensing pump.