Research & Development Of Electrodynmic Hobbing Loosener In Greenhouse

With the development of facility agriculture, the requirements for miniature working machines used in greenhouse are higher and higher. At present, the working level of mechanization for greenhouse in our country is low; most of the work still basically depends on handwork, which takes intensive labor and has lower efficiency. Loosening soil in greenhouse is a basic work, so it badly needs the miniaturized and multifunctional machines that fit the greenhouse to substitute the manpower in order to improve production efficiency. In view of problems existing in greenhouse tillage machines, such as big size, bad adaptability and high price, the scarifier is designed and made, which is suitable to greenhouse.For the space of greenhouse is small, the scheme of electrodynamic scarifier has been simplified. The whole machine composed of electric motor, speed reducer, hobbing axle and operation system etc. Electric motor supplied power and it was connected with speed reducer through shaft coupling. Working part was composed of hobbing axle. Varying speed institution used speed reducer and rag wheel to drive separately. The power of electric motor was transferred to achieve the aim of loosening soil. Operation system includes steering hardware and clutch operating device. The former controls the direction. The latter meshed or declutched; the power of working parts is transferred or broken.The paper discussed and analyzed the basic parameter of scarifier, which referred to the parameter of rotary cultivator and electrodynamic claw scarifier. The scarifier must satisfy agricultural requirements and reduce power consumption. According to the chosen parameter, the power that scarifier needed was calculated through the empirical equation. According the power, the type of electric motor was confirmed.The design of scarifier was drawn according to contriving process. The analysis indicates that after loosening soil by the nail gear on the rolling gear bearing, the effect of cutting and breaking soil is great, the surface of soil is flat, there is no plough pan, ability of tamping soil is weaken, dimension and density of soil is moderate. Driven by the electric motor, it is more economical than using fuel and reduces the working cost. Using it in greenhouse has some superiority.