Patent ID: 8915017

Claim:
A drive device for entrance and exit devices for public transportation vehicles, comprising: a vehicle structure comprising a retaining component configured to hold a drive unit onto the vehicle and act as a counter bearing for torque applied to the drive unit; a rotary column operatively coupled to the entrance and exit device of the vehicle; the drive unit disposed within the rotary column and operatively connecting the rotary column to the retaining component and configured to drive the rotary column about a rotational axis Z-Z during opening and closing operations, said rotary column configured to open and close the entrance and exit device via rotation thereof; a coupling device coupled between the drive unit and the retaining component configured to permit a rotation of the drive unit about the rotational axis Z-Z when a threshold value of the torque applied to the drive unit is exceeded, and a bearing disposed between the coupling device and the retaining component, (i) configured to permit a tumbling motion of the rotary column and the coupling device, the tumbling motion defining a deflection from the rotational axis Z-Z in at least one of an X direction or a Y direction, and (ii) configured to prevent a rotation of the coupling device about the rotational axis Z-Z.