Abstract:Aiming at the problems of excessive resistance of the root-soil complex in the root system control of the short anvil dense planting orchard, and the unsatisfactory cutting operation of the fruit tree root system, a vibrating fruit tree root system cutting device was designed. The analysis of the force model of the cutting device showed that the main factors affecting the resistance were the parameters of the sawtooth machete, the parameters of the root-soil complex, the parameters of the root-soil complex and the sawtooth machete, and the parameters of the operation mode. The cutting device of the vibrating fruit tree root system was designed and analyzed, and the finite element simulation software was used to simulate and analyze the cutting device “root-soil complex”. The average cutting force of the cutting device under vibration was 236.97N, and under no vibration state the average cutting force was 432.35N, achieving the purpose of vibration drag reduction. The soil trough test of the cutting device showed that the average value of the horizontal resistance under the vibration state was less than the average value of 225.34N under the non-vibration state. The effect of cutting the “root-soil complex” under the vibration state was good, and it saw the root system and the soil. Through the orthogonal test analysis of the cutting device to cut the “root-soil complex” under vibration, it can be seen that the optimal operating parameters were eccentricity of 20mm, rotation speed of 3r/s, forward speed of soil trough working platform of 0.2m/s;the main influence factors of soil disturbance were eccentricity and forward speed;the main factors that affected the stability of the cutting device were eccentricity and speed. The test of the whole machine showed that the proportion of root leveling cutting was 21.05% on the left side, 17.39% on the right side, 78.95% on the left side and 82.61% on the right side for sawing. The result showed that the operation process of the vibrating fruit tree root cutting device had a sawing effect on the root-soil complex, reducing the resistance of the machine and the cutting device, and had a drag reduction effect;from the test site, it can be seen that the machine had good stability, leaving a 20~25mm ravine after operation. The thickness of the cutting device was the same as 20mm. The degree of soil eversion was small, and the soil was better. Through the design of vibrating fruit tree root system cutting device, finite element simulation analysis and soil tank test, it provided a idea for fruit tree root system cutting and provided a reference for the design of vibration drag reduction device.