Patent attributes
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.
