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Rotary combine

  • US 5,489,239 A
  • Filed: 09/15/1994
  • Issued: 02/06/1996
  • Est. Priority Date: 09/15/1994
  • Status: Expired due to Term
First Claim
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1. A rotary combine having a frame, a body carried on said frame and defining an internal area, an elongated rotor assembly mounted on the frame in the internal area of the body for threshing crop materials presented thereto, said rotor assembly comprising a rotor arranged for rotation about a fixed axis and within a rotor casing, said rotor casing is supported on the frame within said internal area of the body and includes a perforated threshing section defined by two adjacent concave members extending in circumferential relation relative to said rotor, and wherein the concave members are each supported by a common elongated carrier that extends generally parallel to the rotor, and a concave adjustment assembly is arranged within said internal area for simultaneously adjusting the relative spacing between the rotor and the concave members, said concave adjustment assembly comprising a powered motor assembly arranged within said internal area, linkage arranged within said internal area and that pivots about an axis extending generally parallel to the fixed axis of rotation of the rotor, said linkage being operably connected to and simultaneously moves said concave members toward and away from the rotor to variably control the cooperative threshing relationship between the rotor and the concave members, a screw drive mechanism driven by a gear arrangement and disposed between said motor assembly and said linkage, said screw drive mechanism including a screw rotatable about its longitudinal axis and is prevented from axial movement therealong, and wherein the screw of the screw drive mechanism is arranged in the internal area defined by the body of the combine.

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