| The experiment was based on the research of originally self-driven small scaled rice and wheat harvesting reaper. An overall technical reformation,design and trial manufacture were carried out on its cutting.,conveying and walking system through market investigation,technique predicts,adopting the similar design method,parameter optimization. According to resembling design principle and various restraint conditions for reaper,the optimal overall scheme of reaper working on hillside and some suitable design parameters,such as rotational speed of main shaft in cutting system,cutting speed index,conveying speed index and walking systematic transmission index have been determined. After being exported by water-cooling diesel engine flywheel,the power is divided into two roads:one way is driving yts knife pole and moving knives do reciprocation through triangle leather belt,bevel gear and the organization of crank slide block.The other way is controlling work state using tooth inlay type clutch and delivering power to doubble walking system through triangle leather belt, sprockets after three times decelerate by which the whole process of walking with cutting,conveying as well as laying can be done at the same time.This study based upon the original developed GN121-type tractor, through market researching and technology forecasting, use similar designing and parameter optimization, and after repeated field trials, amendments, to its power transmission system and cutting system’s transformation, design and trial. According to the characteristics of the object and the requirements of harvest mower, determine the design of the overall program and the appropriate spindle speed of the cutting system, cutting speed ratio and other design parameters. This supporting equipment consists by the transmission system, the enhanced body and the cutting system three parts. After the original diesel engine exports power, divided into two by the triangle belt, one way to the cutter; the other way to the walking system, equipment achieves the working process of walking and cutting.Transmission using a belt transmits the drive to the input shaft, and then the bevel gear to change direction, the power passed from the output shaft cutter,the lifting mechanism composed by the raising lever, tooth plate, parallel four-bar linkage and so on.Four-bar linkage’s connecting plate connects the tractor’s the traction frame by two bolts, and stationary, the gear box through two parallel rods connected with the connecting plate, the raising lever is connected through the push rod and gear box. the entire hanging body of manipulation install on frame assembly present position, people need hold the raising lever and the pinch grip handle at the same time, making pins out of the alveolar tooth plate,then people can control the mowing institutions rise and fall.Cutting system adopt the disc cutter means, picking straight double-edged cutter,800mm cutterbar width,speed of blade is60～90m/s, transmission system ratio was chosen as1.44, transmission efficiency is shown0.894.Field experiment indicates that the reaper has the following features,such as simple in structure, smallin volume and portable,small seerve radius,convenient operating,flexible and easy to regulate and maintain. This machine applicable in the plain,mountaious region and hills,sloping field and terraced field,and there is no need to clear the way to grow plant by manual work,and can reap all kinds of grains instaneously,it is economic and practial. |
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