Analysis on Dynamics Characteristics of Vibratory Harvesting for Cutted Sea buckthorn branch and Design of mechanism parame

Abstract

Hippophae rhamnoides have yellow or orange berries, which have high nutritional and medicinal value, but it is difficult to harvest directly because of their close attachment to the fruit branches. The vibration harvesting equipment can be designed and developed correctly and reasonably by using the finite element method to study the vibration harvesting dynamics of Hippophae rhamnoides pruning and the parameter design of the related mechanism. First, the 3D model of Hippophae rhamnoides pruning was established by CATIA and was imported into ABAQUS software for modal analysis and harmonic response. The first 12 natural frequencies were determined to be 4.1 ~ 23.1 Hz, the optimum excitation frequency is 21.1 Hz and 16.2 Hz, and the optimum excitation force is 35 N and 25 N respectively. Secondly, the dynamic model of the cutting branch device is established and solved, and after bringing in the relevant parameters, the optimal design dimensions of crank r and connecting rod l are determined to be r1=22mm, l1=88mm, r2=13mm, l2=52mm, respectively. This research can provide a theoretical basis for the development and testing of a vibrating sea buckthorn-cutting harvesting device.