Car roof wheel assembly without machine room

The utility model discloses a machine-room-less car roof wheel assembly which comprises a plurality of mounting frames, car roof wheels rotationally connected in the mounting frames and connecting plate sets connected between every two adjacent mounting frames, each car roof wheel comprises a wheel body and a wheel shaft arranged in the wheel body in a penetrating mode, and the two ends of each wheel shaft extend out of the corresponding mounting frame. Each connecting plate set comprises a main connecting plate and an auxiliary connecting plate, the two ends of each main connecting plate are arranged on the two corresponding adjacent wheel shafts in a sleeving mode, the auxiliary connecting plates are fixed to the main connecting plates and clamped in the rotation stopping grooves to prevent the wheel shafts from rotating relative to the mounting frame, and buffer layers are arranged at the ends, located in the rotation stopping grooves, of the auxiliary connecting plates. Rotation buffering capacity exists