Patent GB-1259845-A (GB)
Title: Mobile harvesting machine
IPC: A01D45/10
Filed: 1969-04-09
Abstract: 1,259,845. Sugar cane harvester. MINISTERIO DE LA INDUSTRIA BASICA. 9 April, 1969 [9 April, 1968], No. 18236/69. Heading A1F. [Also in Division A4] A mobile harvesting machine for stalk-like' crops such as sugar cane comprises a height adjustable topping device, a height adjustable cutting means, a terrain-contour-following device so that the stalks are cut at the required height above the ground, and an auxiliary cutter mechanism to straighten and cut stalks or dead leaves lying at an angle to or flat on the ground. The topping device, Fig. 4, comprises a framework supporting two diverging arms each having a chain 50 driven so as to guide the crop to the top cutting disc 48. The crop is cut by the blades 49 co-operating with the fingers 52. One arm lies above the cutter disc 48 and the other arm lies below the cutter disc and both are provided with members 66 for guiding crop which would otherwise escape the cutters to the cutter disc. Curved paddles 64 are mounted on the cutter disc axle and are arranged to rotate therewith to assist in dislodging the tops. A shield is mounted on a lower part of the cutting disc to prevent the cutter disc from dragging in dead leaves or the like which would clog other parts of the mechanism. The mechanism is further provided with guide plates 54 to facilitate dislodgement of the tops and keep them away from the machine's working area. The topping device is equipped with a system of levers 67, 68 and 70 (Fig. 1), to adjust the vertical height of the cutters and the angle of inclination to the horizontal. The stalk cutting means is mounted in the nose section (Fig. 2) of the harvester and is suspended on the harvester so that only a small portion of the nose section's weight rests on the ground engaging skids 10, (32). A hydraulic system 35 regulates the skids relative to the nose section to enable the cutting height to be varied. The crops are guided between two vertical hollow walls 2 and 8 (Fig. 3, not shown) to two co-operating cutter discs. The cutter discs are slightly tilted downwards at the front and are formed from two discs with blade segments (36) attached around the circumference of the discs. Inside the wall 2 there is an auxiliary cutting mechanism comprising an endless chain 1 provided with fingers 44, and a vertically disposed circular cutter 3 provided with teeth or knives. An arm 58 extends forwardly from the cutter 3 to grasp tilted cane stalks that might otherwise escape the cutters and also to act as a co-operating member for the rotating cutter disc. The auxiliary cutter mechanism serves to cut stalks which are lying at an angle or flat on the ground. The cut and topped crop is passed from the cutters along a conveyor 6 to the chopping device, Fig. 2. The chopping device comprises two horizontal drums 27, 28 slightly displaced longitudinally of the machine and provided with knives 29. The drums rotate in opposite directions and the co-operating knives chop the stalks into sections and eject them onto the conveyor 12. The sections are then carried to the deflector 13 which is arranged to deposit them in the box 60 which has for its bottom a conveyor 14. The deflector 13 is arranged to continuously change the angle at which sections fall into the box so that the air blast provided by the fan 7 efficiently separates the stalk sections from any foreign matter. The foreign matter is discharged through the chute 69 and the sections are conveyed to the place where they are to be collected. The conveyor 14 has a curved portion forming the bottom of the box 60 and a straight upper portion pivoted on the bottom portion and having a deflecting plate at the top to guide the discharging tops. The conveyor belts are formed from flat bars placed on edge with irregular working edges.