Abstract: A stair climbing device, such as a wheelchair for handicapped comprises a frame having two sides, two wheel pairs each arranged on a respective one of the sides of the frame, each of the wheel pairs having two wheels each provided with a rim and a center axis, two drive shafts provided for each wheel pair, the drive shafts extending parallel to one another and to the center axis and being driven jointly, the wheels of each of the wheel pairs being turnable relative to the frame about the drive shafts, each of the drive shafts being provided with a hub disc with which it is eccentrically connected, the rim of each of the wheels being concentrically and rotatably supported on a a respective one of the hub discs.

Abstract: A small vehicle, in particular a rolling chair, has a frame, at least two running wheels having hubs, a direct current motor provided with a transmission and a stator and located in a region of each of the hubs so as to drive a respective one of the running wheels. The running wheels are formed as movable wheels provided with plug-in axles releasable fixable on the frame. Each of the direct current motors with a respective one of the transmissions is arranged inside a respective one of the hubs without projecting beyond the latter. And a supporting part such that, each of stators of each of the direct current motors are fixable releasably on the frame through the supporting part.