Design Of Tracked Electric Orchard Management Machine Power Platform

In recent years,with the development of China's forestry industry,the output of various fruits has continuously increased.Fruit tree planting is not only one of China's advantageous industries,but also a labor-intensive industry.At present,fertilizer,spraying,and picking operations in fruit production are still mainly based on human labor.The level of mechanization and intelligence in orchard operations is very low.With the development of urbanization and the transfer of large numbers of rural laborers to the secondary and tertiary industries,the contradiction between the sharp increase in the amount of labor needed in orchard operations and the shortage of rural labor has become increasingly prominent.At the same time,with the advancement and development of power battery and motor technology,the general trend of electrification of agricultural equipment has gradually become clear.In order to improve the orchard productivity,reduce the labor cost,and improve the technology level of the orchard management machine in China,the subject has designed a crawler type electric orchard management machine based on the working conditions of orchard operations in China.The main work of this article is summarized as follows:(1)Combining the urgent demand for high-quality labor in China's forestry industry and the development direction of energy cleanliness and electrification of agricultural machinery,the development status of crawler-type orchard operations and equipment at home and abroad is analyzed,and electric orchard equipment is summarized as future development.trend.In accordance with the working conditions of orchard operations,a design scheme for tracked electric orchard management machines was proposed.(2)Completed the design of crawler type electric orchard management machine,including walking part,battery part,lifting part and frame part.Based on the design indicators of each part,the principle analysis,plan design and calculation and selection were carried out.The walking part adopts the scheme that the two motors are independently driven on both sides,and two 5.5kW servo motors are used as the driving motor,and the driving system can directly access the DC work.The battery section uses a battery box and a high-voltage battery management box.It uses 160 series lithium iron phosphate cells.The rated voltage of the battery system is 512V and the capacity is 50Ah.The lifting part adopts a double-headed hinged electric servo cylinder expansion and contraction scheme.The servo cylinder with a power of 2.6 kW has a rated output of 20 kN.The frame section uses a truss-type frame scheme.The frame is welded using rectangular tubes and square tubes.(3)Completed the virtual verification and optimization of key parts.A simple model of the lifting part was established,and the lifting part was analyzed using SOLIDWORKS Motion's multi-body dynamics simulation function.The analysis results showed that the rated output force of the selected servo cylinder satisfies the lifting requirement and the movement of the last three points of suspension meets the requirements of the national standard.,to verify the rationality of the design.After experiencing the three-dimensional model of the frame part,using SOLIDWORKS Simulation finite element simulation function to analyze the frame part,the analysis results show that the frame does not have much stress concentration and deformation,and the safety factor is high.Based on the analysis results,the frame structure was further optimized.Supports were added at the front suspension section,and different profiles were used according to the specific force conditions,which reduced the total frame weight.(4)The complete virtual prototype setup was completed.Virtual assembly,motion interference check,centroid position detection and rollover resistance detection were performed in SOLIDWORKS.The results of the motion interference check show that this design has no design flaws that cause motion interference.The centroid position detection results show that the design can maintain balance in the process of raising agricultural implements.The rollover resistance test results showed that the maximum constant angle of this design is 50.4°.