US Patent 9702093 Material transport carriage

The invention relates to a material transport carriage (1) for transporting bulk material, in particular ballast. Said transport carriage comprises a frame (2) which extends in a longitudinal direction (L), expands in a transverse direction (Q) and spans a frame plane with an upper side and a lower side, in addition to at least two drive units (5) which are connected to the frame (2), and an upper conveyor unit (6) which is arranged on the upper side of the frame plane. Said material transport carriage (1) also comprises a lower conveyor unit (7) which is arranged on the underside of the frame plane (R).