Device for movably fastening a vehicle system to a primary structure of a vehicle, having: a drive unit, which is designed to provide a rotatory movement of a drive element with respect to the primary structure; a first supporting element, which is coupled in a rotatory manner to the drive element via a first rotation axis; wherein the first supporting element is mounted in a rotatory manner with respect to the primary structure of the vehicle via a second rotation axis; a second supporting element, which is coupled in a rotatory manner to the first supporting element; a first connecting element, which is mounted in a rotatory manner with respect to the primary structure of the vehicle via a third rotation axis; wherein the first rotation axis is spaced apart from the second rotation axis by a constant distance; wherein the first connecting element is coupled in a rotatory manner to the second supporting element via a fourth rotation axis; wherein the second supporting element is coupled in a rotatory manner to the first supporting element via a fifth rotation axis, which is spaced apart from the fourth rotation axis, and therefore, during a movement of the first supporting element about the second rotation axis, the first supporting element is movable with a rotational speed which differs from a rotational speed of the second supporting element; wherein the fourth rotation axis is spaced apart from the fifth rotation axis by a constant distance; wherein the fifth rotation axis is spaced apart from the first rotation axis characterized in that the first connecting element has a first actuator, which is designed to change a length of the first connecting element in order thus to adapt the rotational speed of the first supporting element with respect to the rotational speed of the second supporting element. a drive unit, which is designed to provide a rotatory movement of a drive element with respect to the primary structure; a first supporting element, which is coupled in a rotatory manner to the drive element via a first rotation axis; wherein the first supporting element is mounted in a rotatory manner with respect to the primary structure of the vehicle via a second rotation axis; a second supporting element, which is coupled in a rotatory manner to the first supporting element; a first connecting element, which is mounted in a rotatory manner with respect to the primary structure of the vehicle via a third rotation axis; wherein the first rotation axis is spaced apart from the second rotation axis by a constant distance; wherein the first connecting element is coupled in a rotatory manner to the second supporting element via a fourth rotation axis; wherein the second supporting element is coupled in a rotatory manner to the first supporting element via a fifth rotation axis, which is spaced apart from the fourth rotation axis, and therefore, during a movement of the first supporting element about the second rotation axis, the first supporting element is movable with a rotational speed which differs from a rotational speed of the second supporting element; wherein the fourth rotation axis is spaced apart from the fifth rotation axis by a constant distance; wherein the fifth rotation axis is spaced apart from the first rotation axis characterized in that the first connecting element has a first actuator, which is designed to change a length of the first connecting element in order thus to adapt the rotational speed of the first supporting element with respect to the rotational speed of the second supporting element.