| 摘要 |
A motorized moving device is provided of the type comprising a chassis equipped for receiving a person or an object to be transported and an axle mounted for pivoting on the chassis in the lower region thereof, the axle comprising, fixed to each of its ends, a frame which pivotally supports at least three wheels, a first reversible drive means adapted for rotating the axle and second reversible drive wheel for selectively rotating the wheels independently of the rotation of said axle, wherein said first drive means drives said frame through hollow outer shafts integral with said frame and said second drive wheel drives said wheels through inner shafts which are coaxial with and are pivotally received in said outer shafts. |
