High-efficiency and low-damage potato combine harvester

A high-efficiency and low-damage potato combine harvester, comprising a digging device, a conveyance and separation device, a separation and elevation reversing device, a potato collection box, and a control unit, wherein

• the digging device is provided at a front end of the potato combine harvester;
• the conveyance and separation device is provided behind the digging device, and configured to perform preliminary conveyance and separation on a potato-soil-stem mixture dug by the digging device;
• the separation and elevation reversing device is provided at a side of the conveyance and separation device, and configured to further separate the potato-soil-stem mixture from the conveyance and separation device and elevate potatoes to the potato collection box;
• and
• the potato collection box is located at a tail end of the separation and elevation reversing device, and configured to load the potatoes and feed weight information of carried potatoes back to the control unit;
• and the control unit controls an ascending angle, a descending angle, and an inclination angle of a potato carrying part of the potato collection box according to a weight of the carried potatoes,
• wherein the digging device comprises a digging shovel, a vibrating sieve, a drive device, an adjusting device, and a transitional conveyor chain;
• the digging shovel comprises an upper fixed shovel and a lower movable shovel;
• the upper fixed shovel is provided on the lower movable shovel;
• the upper fixed shovel and the lower movable shovel are stacked in a staggered manner;
• a shovel tip of the lower movable shovel extends to a front of a shovel tip of the upper fixed shovel;
• and circular microprotrusion structures are densely arranged on a shovel surface of the upper fixed shovel;
• the vibrating sieve is provided between the digging device and the transitional conveyor chain;
• the drive device is connected to the lower movable shovel and the vibrating sieve, and configured to drive the lower movable shovel and the vibrating sieve to vibrate in a reciprocating manner;
• the adjusting device is provided on a potato harvester frame;
• and the adjusting device is connected to the digging shovel, and configured to adjust a digging depth and a penetrating angle;
• and
• the transitional conveyor chain is provided behind the digging shovel.