Design and Experiment of Opposed Roller-Type Picking Device for Chrysanthemum Indicum

Yiduo Bai, Zhuanghong Ma, Suyuan Liu, Zhengdao Liu (), Xiaoli Yan and Yuxiang Huang
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Yiduo Bai: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Zhuanghong Ma: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Suyuan Liu: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Zhengdao Liu: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Xiaoli Yan: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China
Yuxiang Huang: College of Mechanical and Electronic Engineering, Northwest A&F University, Xianyang 712100, China

Agriculture, 2025, vol. 15, issue 11, 1-19

Abstract: Wild chrysanthemum stems are cluttered and their flowers are dense, which makes them difficult to pick. In order to solve this problem, in this study, we designed a kind of opposed roller picking device. It was designed based on an analysis of the mechanical characteristics involved in the picking of wild chrysanthemum. The design focused on an opposed drum picking mechanism. Taking the critical post-collision acceleration as the evaluation metric, a theoretical analysis was conducted on the post-collision motion behaviors of wild chrysanthemum and the roller bow tooth. This study found that the primary factors affecting the picking process are the roller rotational speed, the feeding speed, and the impact angle. Furthermore, simulation experiments confirmed that when the roller rotational speed was 3.73 rad/s and the clamping chain moved at 1.3 m/s, the wild chrysanthemum picking platform achieved a picking efficiency of 87.72%, thereby meeting the corresponding requirements for wild chrysanthemum harvesting. Through bench tests, it was found that, when the roller gap was 100 mm, the roller bow tooth bending angle was 56°, and the feeding rate was 2.1 kg/s, the clean picking rate reached 95.9%, thereby meeting the requirements for wild chrysanthemum harvesting. The development of an opposite roller-type wild chrysanthemum-picking device can provide technical support for the development of wild chrysanthemum picking equipment.

Keywords: wild chrysanthemum; opposed roller; picking device; structure design (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2025
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