Abstract

A mechanical topology regeneration design method based on the basic chain was presented which was reducing invalid topology design workload and improving optimization design efficiency. And it is used for configuration topology research of planetary separation mechanism of rice transplanting machine to verify its feasibility and effectiveness, which mainly consists of crank-rocker-separation mechanism, mechanical frame, planet carrier, total input shaft, and seedlings folder, and moving trajectory equation of seedling folder point A for the crank-rocker-separation mechanism is obtained according to the quadrangle vector closure principle. The topological synthesis diagram for motion chain for the CRSM was analysis by means of generalized treatment method based on theoretical optimization conditions and topological regeneration path design. The 6 kinds of topology diagram satisfying the design task for motion chair with high motion pair were obtained and the implemented mechanism diagram of kinematic chair for separation mechanism was designed based on the basic chain topology design method. The results show that topology design for the CRSM is relatively simplified for basic chain structure. And theoretical analysis of motion trajectory for the CRSM is relatively the same as the experimental results in the curve trend and relative error of angular displacement is reasonable and effective through test-rig comparative analysis with motion trajectory of crank-rocker-separation mechanism.

Highlights

  • With the rapid developing of China’s urbanization and the urgent need to improve the Chinese people’s livelihood, the agricultural engineering machinery industry plays an important role in the development process of the China in that a large number of agricultural engineering machinery equipment were applied to improve food productions and reduce labor costs

  • The results show that topology design for the crank-rocker-separation mechanism (CRSM) is relatively simplified for basic chain structure

  • It is noted that the agriculture machinery can be rapidly redeveloped to get accurate motion trajectory by optimizing the structure and size parameters, if the topology optimization design can be employed to the field of intelligent rice agricultural machinery and equipment

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Summary

Introduction

With the rapid developing of China’s urbanization and the urgent need to improve the Chinese people’s livelihood, the agricultural engineering machinery industry plays an important role in the development process of the China in that a large number of agricultural engineering machinery equipment were applied to improve food productions and reduce labor costs. National mechanized planting average level only was 38.5% at 2015 and less than 20% of rice-mechanized cultivation in the southwest and southern double-season area in China [4] To cope with these problems, some research institutions and manufactures within the world have paid to the development of the design theory and optimization method. 3. Topology Structures Analysis and Optimization Design for Planetary Distribution Mechanism of Transplanting Machine. It can be seen that gear train for separation mechanism is a planar kinematic chain with one degree of freedom that is composed of eight components and four high motion pairs.

Topological Structure Optimization Conditions and Topological Synthesis
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