Crank rocker reciprocating type reaping apparatus with spring pre-tightening

The utility model relates to a crank rocker reciprocating type reaping apparatus with spring pre-tightening and aims at providing an apparatus capable of being installed on a leaf vegetable harvester to work. The crank rocker reciprocating type reaping apparatus with the spring pre-tightening has the advantages of being high in reaping efficiency, simple in structure and low in cost. According to the technical scheme, the crank rocker reciprocating type reaping apparatus with the spring pre-tightening is characterized by comprising a horizontally arranged saw blade used for cutting leaf vegetables, a cutting power component driving the saw blade in a reciprocating mode and a spring component matched with the cutting power component to achieve the reciprocating movement of the saw blade; the cutting power component comprises a crank and rocker mechanism and a motor supplying power to the crank and rocker mechanism, and a rocker of the crank and rocker mechanism is hinged to one end of the saw blade.