Inner belt traction assembly, dual-drive wrapping belt traction assembly and wrapping belt traction machine

The utility model discloses an inner belt traction assembly, a dual-drive belting traction assembly and a belting tractor, the inner belt traction assembly comprises a fixing frame, a center wheel arranged on the fixing frame, row rollers arranged around the center wheel, a first driving wheel, a driven wheel and a closed-loop inner belt, the row rollers are arranged along an arc-shaped track, the first driving wheel is arranged on the center wheel, and the driven wheel is arranged on the first driving wheel. The first driving wheel and the driven wheel are respectively positioned on extension lines of two ends of an arc-shaped track of the row roller; the row rollers are matched with the inner side surface of the inner belt; the dual-drive belting traction assembly comprises the inner belt traction assembly and an outer belt traction assembly fixed on the frame body, the outer belt traction assembly comprises a plurality of synchronous belt wheels and an outer belt which are distributed around the outer side