Actuating device for an adjustable convertible top system of a motor vehicle

An actuating device for an adjustable convertible top system of a motor vehicle, said device comprising:

• a first hydraulic drive cylinder having an annular area defining in part an annular volume and transmitting an adjustment movement to a first gearing arrangement;
• a second hydraulic drive cylinder having a circular area defining in part a circular volume and transmitting the adjustment movement to a second gearing arrangement, the first drive cylinder and the second drive cylinder being connected hydraulically in series, and therefore the annular volume of the first drive cylinder and the circular volume of the second drive cylinder are hydraulically connected to each other via a connecting line, wherein there is a difference between the annular area of the first drive cylinder, said annular area forming the annular volume, and a circular area of the second drive cylinder, said circular area forming the circular volume, and, during the adjustment of the convertible top system, the first and second drive cylinders being extended and retracted with a defined speed difference owing to the difference between the annular area of the first drive cylinder and the circular area of the second drive cylinder;
• a first intermediate gear interacting with the first gearing arrangement;
• and
• a second intermediate gear interacting with the second gearing arrangement, the first intermediate gear having at least one of a different geometry and kinematics compared to said second intermediate gear compensating for a speed difference between the first and second drive cylinders to maintain a synchronous running of the first gearing arrangement and of the second gearing arrangement.