Actuation device for a transmission system

Actuation device for a transmission system, comprising:

• an electric motor kinematically connected to a speed reduction device and an output shaft of the speed reduction device of axis of rotation, the output shaft being arranged to pivot through three adjacent angular sectors, a first angular sector, a second angular sector adjacent to the first angular sector, and a third angular sector adjacent to the second angular sector;
• an actuation cam rigidly connected to the output shaft for rotation therewith;
• a receiving part axially movable along a main axis perpendicular to the axis of rotation, comprising a receiving recess for receiving the actuation cam formed by two surfaces parallel to each other and perpendicular to the main axis,
• wherein the receiving part moves axially between two end positions when the output shaft pivots through the whole second angular sector,
• the receiving part remaining axially immobile in a first end position when the rotation of the output shaft is situated in the first angular sector,
• and the receiving part remaining axially immobile in a second end position when the rotation of the output shaft is situated in the third angular sector.