Patent ID: 8621948

Claim:
Drive device for boarding/deboarding devices for public transport vehicles, comprising: a drive unit, which is disposed in and drives a rotation post that rotates about an axis of rotation during opening and closing processes and opens and closes the boarding/deboarding device, wherein the drive unit is retained by a retaining component on the vehicle and the retaining component acts as a counter bearing for a torque of the drive unit, and wherein a coupling device is disposed between the drive unit and the retaining component, the coupling device enabling a rotation of the drive unit about the axis of rotation when a threshold value of the torque acting on the drive unit is exceeded, wherein the coupling device is configured as a locking body coupling that comprises at least one first coupling element held in engagement with a second coupling element by a restoring force member, wherein a restoring force exerted by the restoring force member is overcome only when the threshold value of the torque acting on the drive unit is exceeded and the coupling elements are thereby brought out of engagement, and wherein additional bodies are disposed between the coupling elements which transmit the torque.