| 摘要 |
A crop residue chopper for an agricultural combine including a spaced array of stationary knives. A rotor of the chopper is rotatable about an axis therethrough and includes mounting elements in axially spaced relation, and a plurality of offset knives, each of the offset knives including a mounting end portion fixedly mountable on one of the mounting elements and a an opposite free end portion disposed so as to extend radially outwardly in axially offset relation to the mounting end portion when mounted on the mounting element. The offset knives are mountable in pairs on the mounting elements in a fine chopping configuration wherein the free end portions of the knives of each of the pairs are offset in a predetermined first relation to the mounting ends thereof, respectively, and define a space between the free end portions having a predetermined first axial extent for passage of the offset knives of each of the pairs on opposite sides of one of the stationary knives when the rotor is rotated for performing a fine cutting function. Alternatively, selected ones of the offset knives are mountable singly on the mounting elements in a predetermined coarse chopping configuration with the free end portions of the selected ones of the knives offset in an opposite direction from when in the fine chopping configuration so as to define axial spaces between adjacent ones of the free end portions having a predetermined second axial extent greater than the first axial extent for passage in proximity to at least one of the stationary knives when the rotor is rotated, for performing a coarse cutting function.
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