Schaltwalzenaktorik mit durch Spannungserhöhung dynamikgesteigerter Ausführung

摘要

The invention relates to an actuating device (1) for selecting and shifting a gear ratio of a shiftable transmission and for engaging and/or disengaging a motor-vehicle clutch (2), comprising at least one drum element (3), which can be rotated by a motor (26) in such a way that the direction of rotation can be reversed and which has at least one guide track (4, 5), wherein a contact element (6, 7), which is arranged on a shifting fork (7, 8), can be selectively moved in the guide track (4, 5) in such a way that, when the contact element (6, 7) is moved in a first direction (10), an axial displacement of the contact element (6, 7) is forced in order to select a gear ratio of the shiftable transmission, and, when the contact element (6, 7) is moved in a second direction (14) opposite the first direction, a shifting (21) of a gear ratio is forced, wherein a voltage-changing element for controlling the motor (26) is connected upstream of the motor in such a way that, in the case of operating points of the motor (26) with only low load, the operating voltage acting on the motor (26) is increased. The invention further relates to a method for actuating a transmission and a clutch (2), comprising at least one drum element (3) and at least one shifting fork (8, 9), wherein each drum element (3) has only one motor (26) and the shifting, selecting, and clutch processes are driven by the one motor (26), wherein the motor (26) is operated with a first operating voltage for a first operating state for shifting and/or selecting and with a second operating voltage for a second operating state for coupling, wherein the first operating voltage is higher than the second operating voltage, and therefore the motor (26) is operated at a higher rotational speed in the first operating state than in the second operating state.