A simulator apparatus with at least two degrees of freedom of movement for
an instrument which has an elongated shaft, has a holding device for the
instrument, the holding device being designed such that the instrument has
at least a first degree of freedom of rotary movement about the
longitudinal axis of the shaft and at least a second degree of freedom of
translatory movement in the direction of the shaft. The holding device has
a gear arrangement for the first and second degrees of freedom, which has
a first bevel gear, which is connected to the shaft and corotates with the
latter about the longitudinal axis thereof, and has a second and a third
bevel gear which are arranged on either side of the first bevel gear and
are in rolling engagement therewith.
