| 摘要 |
The invention concerns a linear drive ( 1 ) with a linear stroke for the displacement of movably supported parts, in particular of articles of furniture, comprising a rotary spindle ( 2 ) which is driven by a motor and which at the drive output side is in screwthreaded engagement with a thrust tube ( 3 ) or a spindle nut ( 4 ) connected thereto with a female screwthread ( 5 ), wherein the thrust tube ( 3 ) is mounted non-rotatably and slidably in the housing ( 6 ) and is displaceable in the housing ( 6 ) over a stroke travel h relative to the rotary element, and a travel measuring device for measuring the stroke travel h. With the aim of developing a linear drive ( 1 ) in such a way that it is uncomplicated and inexpensive, operates reproducibly accurately and even after power shut-down does not require renewed zeroing for travel measurement, it is proposed that the travel measuring device has a linear potentiometer device ( 7 ) with a linear potentiometer ( 8 ) and that the linear potentiometer ( 8 ) for linear measurement of the stroke travel h is arranged parallel to the stroke travel.
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