초록 ▼

Harvested crop material is fed to the cylindrical cutter-head of a forage harvester by a feeding assembly consisting of opposed pairs of upper and lower feed rolls. The articulated upper roll assembly floats to accommodate variations in the flow of crop material. The downstream upper feed roll is ca

Harvested crop material is fed to the cylindrical cutter-head of a forage harvester by a feeding assembly consisting of opposed pairs of upper and lower feed rolls. The articulated upper roll assembly floats to accommodate variations in the flow of crop material. The downstream upper feed roll is carried on a pair of opposite radius arms which are rigidly coupled by a transverse leveler shaft, providing a stable frame and minimizing cocking or twisting of the roll. A second pair of feed roll arms is pivotally connected to the radius arms and extends forward to support the upstream feed roll which is journaled on a shaft rigidly connected between the feed roll arms. A stop and biasing arrangement provides that each upper roll may float independently, the articulation of the feed roll assembly being such that upward movement of either roll or the rolls together is subject to the restoring force of a tension spring. However, upward movement of the upstream roll in relation to the downstream roll is restricted by a stop which limits rotational movement between the feed roll arms and the radius arms supporting the rolls.

대표청구항 ▼

In a forage harvester having a forward mounted harvesting unit, a cutterhead and a feeding assembly including a body and opposite generally fore-and-aft extending side walls and cooperating upper and lower conveyor assemblies for receiving crop material from the harvesting unit and conveying it rear

In a forage harvester having a forward mounted harvesting unit, a cutterhead and a feeding assembly including a body and opposite generally fore-and-aft extending side walls and cooperating upper and lower conveyor assemblies for receiving crop material from the harvesting unit and conveying it rearwardly in a mat between the conveyor assemblies for delivery to the cutterhead, the upper conveyor assembly comprising: a pair of opposite radius arms, each arm extending fore-and-aft adjacent an opposite side wall and supported by the body for pivotal movement about a transverse axis; a first feed roll adjacent the cutterhead extending transversely between the opposite side walls and rotatably supported by and between the radius arms forward of the pivotal support of said arms; a stiff transverse leveler shaft, resistant to torsional and bending deflection and extending between and directly and rigidly attached to the opposite radius arms external to the periphery of the first feed roll, the leveler shaft cooperating with the opposite radius arms to form a rigid frame pivoted to the body for resisting relative rotational deflection between the radius arms and maintaining the transverse alignment of the first feed roll; and bias means for urging the upper conveyor towards the lower conveyor assembly and compressing the mat.