玉米收获机的毕业设计.doc

与上海—50拖拉机配套 玉米收获机的设计（输送装置） 摘 要 玉米作为三大主要的粮食作物之一和饲料来源，在我国分布广泛、种植面积大。因此为了使人们从繁重的收获劳动中解脱出来，实现玉米的机械化收获，提高现有拖拉机的利用率，结合市场需求我们进行了此次设计。 考虑到市场上现有机型特点，大致可分为自走式、牵引式、背负式玉米联合收获机等三种类型。结合实际生产需要和各机型作业、结构特点，我们选择与上海—50拖拉机配套的背负式玉米联合收获机作为研究和设计对象。背负式玉米联合收获机由分禾器、拨禾链、摘穗辊、果穗第一升运器（螺旋升运器）、果穗第二升运器（刮板输送器）、集穗箱和秸秆粉碎还田机等组成。该收获机能一次完成摘穗、剥皮、果穗输送、集穗箱、茎秆粉碎还田等项作业。其优点为价格适中，作业时无需人工开道，拖拉机利用率高，产品可靠率在95%以上，作业效果能够满足用户需求，因此深受广大农民用户的欢迎。 本次设计重点在于整机配置，结构参数的计算、选择以及输送装置的参数选择和计算。输送装置采用刮板式输送器，将果穗逐渐送到集穗箱。大大降低劳动强度，省时省力。 关键词：玉米联合收获机，上海—50拖拉机，背负式，输送装置 THE DESIGN OF CORN COMBINED HARSTER POWERED BY SHANGHAI-50 TRACTOR ABSTRACT Corn as one of the three main grain crops and feed sources, widely distributed in China, a large acreage. Therefore, in order to enable people to gain from the heavy labor freed to realize the mechanization of corn harvest, increase the utilization of existing tractors, combined with market demand, we had the design. Taking into account the market characteristics of existing models can be broadly divided into self-propelled, tractor, backpack, etc. corn harvester three types. Needs and the actual production model work, structural features, we choose to carry the tractor Shanghai -50 Corn Combine Harvester as a research and design objects. Knapsack Corn Combine Harvester by the divider device, dial Wo chain, snapping rolls, the first elevator ear device (screw elevator device), the second elevator ear device (scraper conveyor), the cluster boxes and straw Breaking field machine, etc. The function of a completed harvest snapping, peeling, ear transmission, the cluster box, stem crushing other items of work to field. The advantage of affordable, work without having to manually clear the way, tractor utilization, and product reliability rate of more than 95%, operating results to meet customer needs, so popular among the peasants users. This design focuses on machine configuration, the calculation of structural parameters, selection and delivery mechanism and calculation of parameters. Conveyor installa