Actuating device for an automated manual transmission

An actuating device (10) for an automated manual transmission (12) of a motor vehicle, wherein a selector element or shift element of the automated manual transmission is movable by the actuating device (10) for setting a shift gate or for engaging or disengaging a gear, the actuating device (10) comprising:

• a housing (18) having a cylindrical receiving chamber (50),
• a pressure-medium-operated actuator (54) having a piston (58) and a piston rod (64),
• wherein the piston rod (64) is connectable to the selector element or shift element of the manual transmission,
• wherein the piston (58) is arranged in a radially sealed manner in the receiving chamber (50) of the housing (18) of the actuating device (10) and is coaxially movable in the receiving chamber (50),
• a sensor system (30) including a magnet (38) and a magnetic-field-sensitive sensor (32),
• wherein the magnet (38) is arranged on an end face of the piston (58) remote from the piston rod (64) by a holding device (44),
• wherein the sensor (32) is arranged radially with respect to the magnet (38) on the housing,
• wherein the holding device (44) is connected to the piston (58) such that the piston is rotatable about a longitudinal central axis (52) of the receiving chamber (50),
• wherein the holding device (44) has a hollow cylindrical or a hollow-cylinder-segment-shaped geometry,
• wherein a rod-shaped or plate-shaped anti-rotation element (80) having two ends is form-lockingly accommodated at least with the two ends in an associated recess (120) in the housing (18), and
• wherein the anti-rotation element (80) extends across the holding device (44) in the manner of a secant with play and spaced apart from the magnet (38), wherein the piston (58) is moveable axially and rotationally, wherein a rotational movement of the holding device (44) about the longitudinal central axis (52) of the receiving chamber (50) is prevented.