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The power in case of power tiller units is transmitted through an intermediate shaft to the gearbox on windrower either by belt or by shaft drive.
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Pressure springs are fitted below the star wheels between the conveying platforms to keep the cut crop in upright position while it is being conveyed out of the machine. The top lugged conveyor belt drives the star wheels on the crop row dividers. The serrated blade cutter bar with standard knife guards is fitted. The output shaft transmits power to the shaft driving the lugged flat conveyor belts and a crank is attached at the lower end of the output shaft to operate the cutter bar through connecting rod. The gearbox and windrower is coupled to the drive shaft of the prime mower. Vertically held crop is then delivered towards right side of the machine in a windrow perpendicular to the direction of movement of machine with the help of lugged conveyor belt. After the crop is cut, held in a vertical position during its passage by means of pressure springs and star wheels. Crop row dividers with star wheels enter the standing crop, help in lifting, gathering and guiding the crop towards the cutter bar. Cutter bar is given reciprocating motion by crank wheel. It consists of a conventional cutter bar assembly, crop row dividers with star wheels, covers, pressure springs and vertical conveyor belts (Fig. Power tiller/Tractor front mounted vertical conveyer reaper windrower: A machine called vertical conveyor reaper–cum-windrower can cut the crop and lay it in the form of windrow for easy picking. It can cover 0.2-0.4 ha/h with field efficiency of about 80%. The drive to the cutter bar from engine is given through V belt and gearbox. A 2 hp 4-stroke petrol engine operates the cutter bar. The effective field capacity of machine varies between 0.2-0.3 ha/h.Īnimal-drawn engine operated reaper: It has a cutter bar of 1.35 m length. As the machine is pull forward by a pair of bullocks, a reciprocating motion is imparted to the knife bar with a peak cutting velocity of about 100 m/min. The power to drive the knife bar is given from the ground wheel by means of gear box, crank and connecting rod mechanism. A reaper may be classified as animal-drawn reaper, animal-drawn engine operated reaper, tractor rear mounted PTO operated reaper, power tiller operated or tractor front mounted vertical conveyer type reapers and tractor mounted reaper binder.Īnimal-drawn reaper: It consists of a cutter bar of 1.05 m length (Fig. The standing crop in the field can be harvested with the use of reapers. Delayed harvesting causes grain shattering due to over maturity. There is a tremendous crop loss when untimely rain is experienced. Harvesting of cereal crops especially wheat and rice is a serious problem. self-propelled and tractor operated are common for these crops. Combines are being used mostly for harvesting crops like wheat, paddy, soybean, sunflower and other crops. Combine harvesters are now becoming increasingly popular in northern India and also in other parts of country. It can be powered with power tiller or tractor. Tractor front mounted reapers and mowers are also being used for harvesting various crops. The output varies between 0.2 to 0.4 ha/day. The unit is mounted on the back of the operator, who also activates the cutting rod. A rotary circular disc with plain or serrated edge accomplishes the cutting by impact force. A manually operated rotary power scythe (push-cutter) uses a high-speed engine for rotating the cutter blade. Power operated machines can be reaper, mower, rotary power scythes, forage harvester, binder and conventional combines. Animal drawn reapers have been tried and proved successful on wheat crops. Sickle used may be plain or serrated edged and both types are found effective in cutting plants. Sickle is the most widely used harvesting tool for various crops (Fig. Harvesting equipment may be manually operated, animal-drawn or power operated.