Design And Research Of Potato Harvester Based On Modular Design

As one of the main food crops,potato is planted in many areas in China,of which about one-third of the total planting area is mainly in Guizhou province of the southwest area.Houttuynia cordata is a kind of rhizome plant that grows in the soil and can be eaten or used as a traditional Chinese medicine.It has also been planted in large areas in Guizhou.Introduced harvesters have poor adaptability,because of small and scattered terraced plots,humid and rainy climate,growing different agronomic and so on.In order to make harvester have multiple configurations to harvest potatoes and houttuynia cordata effectively,a self-propelled small potato harvester is designed based on the modular design concept.The main contents are as follows:1.Taking potato harvester as the basic model,the modular design is carried out.We determine the function,structural size,dynamic parameters of the harvester through investigation and Analysis of related products and users in potato growing areas.And finally Plan new products and formulate harvester series;2.The total function of potato harvester is divided into a series of hierarchical functional modules,based on the functional flow model.Combinations of different alternative modules can be derived harvesters with different functions such as potato harvesters,houttuynia cordata harvesters.It is also possible to derive potato harvesters or houttuynia cordata harvesters that the same function but different performance and different selling prices;3.Overall structure of potato harvester is deployed.Considering the convenience of conversion modules and the maneuverability of the operator,different structural design of the functional modules are carried out in terms of the different physical characteristics of potato and houttuynia cordata;4.As a key module of harvester,the performance of digging module is critical.It is required to have a large shovel angle to reduce the resistance of entering the soil,and a small shovel angle to reduce the resistance of excavating soil during normal operation.The lifting module is designed based on the hinged four-bar mechanism,which effectively solves the contradiction of the traditional excavating mechanism.The performance of digging module is analyzed,and the process of entering soil is analyzed based on Motion simulation software;5.Design of shaker module and theoretical analysis of the material on the sieve are completed.Through vibrating sieve module's simulation of Adams software,it is determined reasonable crank speed and crank eccentricity,which provides theoretical basis for the working parameters of the prototype;6.Prototype making and field test are completed.Digging module should be able to enter soil smoothly and meet the depth requirements,and the test results meet the requirements of qualified indicators.As a modern design method,modular design is applied to the research of subject.It provides users with different harvesters through effective sharing of common modules,and the quick configuration of different Special modules.The combination of modular design method and agricultural machinery design is the development direction of agricultural mechanization in the future,especially for hilly fields.