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Electronic dosing drive

A technology of driving device and electric driving motor, which is applied in the direction of transmission device, measuring tube/suction tube, laboratory container, etc., can solve the problems of screw cost processing, reduce the precision of rod driving device, plastic deformation, etc., and achieve anti- Reduced corrosion and chemical stability, improved sliding properties, and space-saving effects

Active Publication Date: 2018-11-13
EPPENDIRF AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Disadvantages are: complex machining of the screw by means of a high-precision lathe and finishing, for example by deburring
Overloading leads to plastic deformation, which also reduces the precision of the rod drive

Method used

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  • Electronic dosing drive

Examples

Experimental program
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Embodiment Construction

[0076] In the present application, the expressions "upper" and "lower" and expressions derived therefrom relate to the vertical orientation of the screw and the arrangement of the drive motor above the screw.

[0077] Features of the different exemplary embodiments that are identified by the same concept are provided with the same reference symbols in the following text.

[0078] according to figure 1 with figure 2 The handheld electronic dispensing device 1 is a handheld electronic dispensing tube. It has a rod-shaped housing 2 which is divided longitudinally into a front housing shell 3 and a rear housing shell 4 .

[0079] A selection wheel 5 for selecting the respective operating mode is arranged on the front side of the housing 2 at the upper end. By means of the selection wheel 5 , for example, the metering functions—pipetting, dispensing and titration—can be set.

[0080] Underneath, the display 6 is inserted into the front side of the housing 2 .

[0081] There a...

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PUM

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Abstract

The invention relates to an electronic dosing drive comprising a support structure, a threaded spindle with an external thread for driving a plunger, at least one first guide element is firmly connected, and is guided parallel to the threaded spindle on a second guide element, a spindle nut having an internal thread is engaged with the external thread of the threaded spindle, an electric drive motor having a motor shaft is coupled with the spindle nut and is attached to the support structure, an electric control apparatus is connected to the electric drive motor, where the external thread of the threaded spindle has multiple threaded areas that are separated from each other by first flattenings on their circumference extending in the longitudinal direction, and the first flattenings have guide areas that abut the core diameter of the internal thread of the spindle nut.

Description

technical field [0001] The invention relates to an electronic dosing drive comprising a rod drive and an electric drive motor for driving a piston in a cylinder. Background technique [0002] Electronic dosing devices are used in particular for dosing liquids in scientific and industrial laboratories and in medical, molecular biology and pharmaceutical fields of application. The electronic metering device has an electronic metering drive for driving the piston in the cylinder. In straight-through extruder systems, the dosing device is coupled with an exchangeable syringe. The electric metering drive drives the injection piston in the injection cylinder of the syringe, whereby the intake of liquid in the syringe and the discharge of liquid from the syringe are controlled. Here, the injection plunger is in contact with the liquid. The discharge is preferably carried out in several steps. The syringes are exchangeable in order to avoid delays in dosing different liquids wit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01L3/02
CPCB01L3/0227B01L3/0289F16H25/24F16H2025/2481F16H2025/249
Inventor B·赖希穆特M·威尔斯J·扎特勒
Owner EPPENDIRF AG