Coaxial rotating automatic step surface

A coaxial rotating automated stepped surface assembly for a vehicle includes at least one stepped surface portion, a single pivot axis, a coaxial motor arrangement relative to the pivot axis, and a complete system package outside a beam structure. The motor is a non-reverse-drivable motor and can be self-locked in a predetermined position in an operable manner. 本发明提供了一种适于车辆的同轴旋转自动台阶表面组件，该同轴旋转自动台阶表面组件包括至少一个台阶表面部分、单个枢转轴线、相对于枢转轴线的同轴马达装置、以及在梁结构外侧的完整系统包装。该马达是不可反向驱动的马达并且能够以可操作的方式自锁在预定位置中。