Design and Test of 9L-200 Shrub Harvester

In view of demand of mechanized harvesting of shrub plants such as Caragana korshinskii, Hippophae rhamnoides L., Salix cheilophila S., and Amorpha fruticosa L., the 9L-200 shrub harvester was developed and designed．Crawler chassis suitable for sandy land, sandy slope, hilly land and muddy land was adopted, and quantitative hydraulic pump+proportional valve+variable travel motor was used for driving．Based on sawing principle, a cutting and feeding header with double circular saw discs rotating inwards to cut shrubs without support was designed．Combined chopping drum device was developed．By increasing or decreasing number of moving knives and tool holders, stepwise adjustment technology of cutting length was realized．A reverse gear box device has been installed to achieve rapid removal of blockages．According to field inspection and field test of National Agricultural Machinery Quality Inspection and Testing Center, productivity of the machine was 0.40～0.67 hm²/h, material cutting length was 20～40 mm adjustable, and all performance indicators met design requirements, meeting market needs of large-scale shrub flat stubble harvesting and industrial resource utilization．