花生收获机外

Design principle and analyses of the motion

characteristics of4H-2type peanut harvester

Shang Shuqi,Wang Jiangang,Wang Fangyan,Liu Shuguang,Jiang Yuanzhi (EngineeringSchool,LaiyangAgricultural University,Laiyang,Shandong265200,China) Abstract: The structure, working principle and design of main parts of the 4H-2 type peanut harvester were described andanalyzed, and the kinematics model of the main work parts was founded. On the basis of the optimized structure, therepresentative tracks of the work parts were described by means of Visual Basic and SPSS software and the machinefunction characteristics. The theoretical foundation has been provided for further study of this kind of machines.

Key words: Peanut harvester; design principle; motion characteristics

CLC number: S225.73 Document Code: A Article ID:1002-6819(2005)01-0087-05

1 Introduction

The peanut is one of the main oil plants in the world, which is only inferior to soybean but ranks the second for oil production and international trade.For a long time, the planting, harvesting and processing of peanut were mostly completed by manual work. It is a piece of labored work with low efficiency, which affects the peanut production seriously. Especially in the last few years, as the transferring surplus rural labors to urban areas, the contradiction of each link of peanut production is more intensifying, the mechanization of the peanut production becomes particularly important.

It has been a long time for researching and developing the peanut harvesters in developed countries, it is a typical representative that the LP-2 type peanut harvester and peanut combine harvester of "Courtesy lf Lilli ston Mfg. Co." in the United States and PH-2 type peanut harvester of Michigan in Netherlands. The development of peanut harvester in China is later than that in developed countries, perhaps the beginning of the 1960s. Since the 1970s, many representative mimic peanut harvesters were introduced into China such as the Dongfeng 69 type, 4HW-800 type and 4H-150 type peanut harvester etc.These products bring convenience for harvesting peanut, but the structure of all current harvesters adopted the two steps of harvest principle—scoop and separating chain combine together. These machines have to match with the medium-big power tractors. It is not only complex in structure, higher manufacturing costs, more power consumption, poor reliability, but also higher harvesting loss rate, peanut vines spread disorderly, and inconvenient for manual collection. It is not suitable for the current requirement of peanut harvesting and results in that the harvesting of peanut is almost completed by manual work at present. The mechanization level of peanut harvesting affected the development of the peanut production seriously.

2 Structure design of the peanut harvester