Patent ID: 8726750

Claim:
A mechanism ( 1 ) for actuating a shifting element ( 2 ) having two shifting element halves ( 3 , 4 ), which are either functionally connectable with one another to connect at least two components or disengaged from one another to break the connection between the two components; a drive machine ( 5 ); a drive converter unit ( 6 ) in an area of which rotary drive motion of the drive machine ( 5 ) being converted into translational actuation movement of the shifting element ( 2 ); a transmission device ( 10 ) being provided between a motor output shaft ( 11 ) of the drive machine ( 5 ) and the drive converter unit ( 6 ), a first shifting element half ( 13 ) of a friction brake ( 14 ) being connected, fixed in an axial direction, to the motor output shaft ( 11 ), which by way of a freewheel device ( 15 ) being coupled, in a rotationally fixed manner, to the motor output shaft ( 11 ), when a rotational direction of the motor output shaft ( 11 ) is equivalent to a disengaging movement of the shifting element ( 2 ), and, in the presence of an engaging force acting in opposition to the disengaging movement of the shifting element ( 2 ), in each case an axial force (FA 1 ) that results from a tooth geometry in an area of the transmission device ( 10 ) being applied in an area of the motor output shaft ( 11 ), by virtue of which the first shifting element half ( 13 ) of the brake ( 14 ) is brought into frictional engagement with a second shifting element half ( 20 ) that is both axially and rotationally fixed, and the axial force (FA 1 ) acting on the motor output shaft ( 11 ) is then supportable in an area of the brake ( 14 ), whereas in the presence of a disengaging force acting in a disengaging direction of the shifting element ( 2 ), a respective axial force (FA 2 ) that results from the tooth geometry in the area of the transmission device being applied in the area of the motor output shaft ( 11 ), by virtue of which the first shifting element half ( 13 ) of the brake ( 14 ) can be moved out of frictional engagement with the second shifting element half ( 20 ).