Authors

Abstract

Flower thinning is an important agricultural process in orchards. To address issues such as insufficient thinning accuracy and the need for secondary operations in traditional orchard thinning mechanisms, and to meet the agricultural demands for precise flower thinning, this study designs a comb-type flower thinning end effector based on the physical characteristics of the flowers and the agronomic requirements for thinning. This study adopts a flower thinning method combining thinning leaf spring piece and comb teeth. By optimizing the design of the spring piece dimensions, the study first systematically analyzes the force characteristics of the spring piece during the working process, as well as the force conditions of the flowers under different operating conditions, to identify the key factors affecting flower abscission. Next, ADAMS software is used for rigid-flexible coupling dynamic simulation analysis to determine the optimal working speed of the key flower thinning device as 230–250 r/min. Finally, field tests were conducted to verify the working reliability of the flower thinning machine. The test results show that the machine meets the expected design goals, providing technical support for efficient and precise flower thinning operations in orchards.

Abstract in Chinese

疏花是果园工作中重要的农艺过程，为解决传统果园疏花机构存在的疏花精度不足、需二次作业等问题，满足果园精确疏花的农艺需求，本研究基于花朵物理特性与疏花农艺要求，设计了梳齿式疏花末端执行机构。本研究采用疏花弹片与梳齿相结合的疏花形式，通过对弹片尺寸进行优化设计，首先系统分析弹片在工作过程中的受力特性，以及花朵在不同作业工况下的受力情况，明确影响花朵脱落的关键影响因素。其次，运用ADAMS软件进行刚柔耦合动力学仿真分析，确定疏花关键装置的最佳工作转速为230~250r/min。最终通过田间试验对疏花机的工作可靠性进行验证，试验结果表明该疏花机达到预期设计目标，为果园高效精准疏花作业提供了技术支撑。