• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2016, Vol. 52 ›› Issue (1): 64-71.doi: 10.3901/JME.2016.01.064

• 机构学及机器人 • 上一篇    下一篇

基于秧针静轨迹的分插机构非圆齿轮求解

李革1,  应孔月1,  张继钊1,  李鉴方2,俞高红1,  叶永松1,  王婵1,  李世明1   

  1. 1. 浙江理工大学机械与自动控制学院  杭州  310018;
    2. 萧山区农业机械监督管理总站  杭州  3111200
  • 收稿日期:2015-04-09 修回日期:2015-10-26 出版日期:2016-01-05 发布日期:2016-01-05
  • 作者简介:李革,男,1958年出生,博士,教授,硕士研究生导师。主要研究方向为现代农业装备及技术。 E-mail:lige0717g@163.com
  • 基金资助:
    国家自然科学基金(51375459)、国家高技术研究发展计划(863计划,2012AA10A504)和现代农业产业技术体系(111329A4C12352)资助项目。

Computation Method of Non-circular Gear Based on Seedling Needle Tip Point’s Static Trajectory in Transplanting Mechanism

LI Ge1, YING Kongyue1, ZHANG Jizhao1, LI Jianfang2,  YU Gaohong1, YE Yongsong1, WANG Chan1, LI Shiming1   

  1. 1. School of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou 310018;
    2. Xiaoshan District Agricultural Machinery Regulatory Station, Hangzhou 310018
  • Received:2015-04-09 Revised:2015-10-26 Online:2016-01-05 Published:2016-01-05

摘要: 针对目前插秧机的旋转式分插机构非圆齿轮的节曲线均采用函数表达式设计方法的局限性,提出通过理想的秧针静轨迹直接求解分插机构的行星轮系中非圆齿轮传动比的设计方法。利用数值分析的方法由秧针静轨迹求解行星架与行星轮自转的传动比,根据旋转式分插机构行星轮系结构的对称性特点,把非圆齿轮之间的传动比以 为周期分段,建立分段传动比之间的关系和分段传动比与行星架与行星轮自转传动比的关系。在满足轮系总传动比的条件下,提出非圆齿轮的半圆正齿节曲线假设,解决了求解分段传动比有效方程不够的问题。通过对求解出的非圆齿轮系分插机构的三维建模和动态仿真,验证了提出的基于秧针静轨迹求解分插机构非圆齿轮节曲线的方法正确。

关键词: 插秧机, 非圆齿轮, 秧针静轨迹

Abstract: A new design method of planetary gear train’s non-circular gear ratio of transplanting mechanism is presented by analyzing perfect seedling needle tip point’s static trajectory, aiming at the limitation of non-circular gear pitch curve’s design method in rice transplanter’s rotary mechanism at present. The transmission ratio between planet carrier and rotation velocity of planet gear is solved by analyzing seedling needle tip point’s static trajectory using the method of numerical analysis. The relationships of segmented transmission ratios, and the relationships between segmented transmission ratios and the transmission ratio between planet carrier and rotation velocity of planet gear are established by sectioning the transmission ratios of non-circular gear with a period of π on the basis of the symmetry of planetary gear train of rotary transplanting mechanism. Under the condition of total transmission ratios, the half spur gear assumption of non-circular gear is presented, and the problem of shortage of equations which are effective to solve the transmission ratios is solved. The correctness of computation method of non-circular gear based on seedling needle tip point’s static trajectory in transplanting mechanism is verified by three dimensional mode design and kinematics simulation of calculated non-circular gear trains.

Key words: non-circular gear, rice transplanter, seedling needle tip point’s trajectory

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