Adjustable spreader system for an agricultural harvester

A spreader system for use in a self-propelled agricultural harvester for spreading crop residue in an area behind the harvester, the system comprising:

• a pair of spreader rotors configured to rotate about upright rotation axes so as to eject crop residue in a central area between the spreader rotors, and in a direction that is tangential to the spreader rotors, wherein the spreader rotors extend in a direction of the rotation axes between a lower plane and an upper plane;
• and
• a deflector assembly for deflecting ejected crop residue laterally away from the central area, the deflector assembly comprising:
• a first structure configured to oscillate by undergoing a reciprocating motion relative to a neutral position, and
• two adjustable deflector blades arranged to deflect residue material ejected respectively by the two spreader rotors, each of the adjustable deflector blades having an at least partially curved shape extending between an inner extremity in the central area between the spreader rotors and an outer extremity in a lateral area, wherein the adjustable deflector blades are coupled to the first structure in such a way that:
• the adjustable deflector blades oscillate together with the first structure;
• and
• the adjustable deflector blades are movable to any one of a plurality of stationary positions relative to the first structure,
• wherein the first structure is a main deflector comprising two main deflector blades fixed to each other by a connection in the central area between the spreader rotors, the main deflector having a lower edge formed by lower edges of the main deflector blades and of the central connection, and wherein a gap is present between the lower edge of the main deflector and the lower plane of the spreader rotors, when the main deflector is in the neutral position, and
• the adjustable deflector blades are parallel to and arranged in close proximity to the main deflector blades of the main deflector and are configured so as to be extendable downward and retractable upwards relative to the main deflector while overlapping the main deflector blades of the main deflector, so as to adjust a width or a shape of the gap.