| 摘要 |
PURPOSE: To instantaneously and directly determine a momentary position to remove an error widely to a large extent, by jointing an element to determine a position of a feeding pump to a driving element tightly, and connecting electrically or magnetically a position limiting element along moving path consistent to a varying direction of the driving element to an absolute variation pick-up. CONSTITUTION: This feeding pump comprises of a motor gear unit 1 to move a spindle 2 with screw and is arranged on the spindle by the driving element movable linearly. An end of a feeding cylinder 5 of an injector 4 is inserted into a holder 8, to insert a rear end of a piston bar 7 into a rear holder 9. A position determining element 3, and binds and connects functionally to the absolute variation pick-up 12. The pick-up 12 is constructed with a linear potentiometer and may be formed by an induction volumetric or magnetic position indicative element. The position determining element 11 of the driving element 3 is in a given position, and the potentiometer outputs a given output voltage Ua to transfer a signal to an evaluation unit 13. The output voltage Ua is proportional to a momentary position of a feeding piston 6 and shows a coordinate on a moving or a positioning axis after a corresponding conversion.
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