Linear drive e.g. electrical linear drive, for use in medical technology, has coupling device arranged such that linear function line intersects connection line between surfaces, so that rotor is pulled up against surfaces

摘要

The drive (1) has a drive part provided in a tubular body (3). The part is movably coupled with a rotor (13) by a permanent magnet coupling device. Two supporting surfaces (25a, 25b) are provided at an outer circumference of the body and are arranged with inclinations angled to each other. The coupling device is formed and arranged such that a linear function line of a magnetic force of attraction intersects a connection line between the surfaces, so that the rotor is pulled up against the surfaces for centering the rotor with respect to the body, where the force acts on the rotor.