Design and simulation experiment of excavating device of rhizome harvester for Chinese medicinal materials

In view of the problems such as insufficient digging depth, large resistance to entering soil, serious power loss, poor effect of breaking soil and serious wear of shovel tip, etc., the parameters, driving mechanism and motion characteristics of excavator shovel of vibration excavator were studied and analyzed by theoretical calculation and simulation. The results show that the digging device adopts a saw-tooth plane triangle shovel, and its cutting edge angle is less than 94°, the value range of embedment angle is 20°-30°, the working depth is greater than 500 mm, the length of the shovel surface is 772 mm, and the digging shovel is driven by a four-bar mechanism. According to the software simulation, it can be seen that the type of motion of the digging shovel during working is simple harmonic motion. The digging shovel is smooth and free from interference during the movement, and the movement characteristics are consistent with the theoretical derived values. When the forward speed of the harvester is 2.4 m/s, the entry angle is 25°, and the rotation speed is 280 r/min, the digging resistance of the digging shovel is the smallest. When the harvesting machine for rhizome Chinese medicinal materials adopts vibration excavating device for harvesting operation, it can effectively reduce the excavation resistance, and has a good effect of separating broken soil. The whole operation is stable, the work is reliable, and all performances meet the requirements of industry standards.