非圆锥齿轮球面齿廓数值计算方法

非圆锥齿轮传动是宽窄行分插机构实现空间插秧轨迹的重要组成部分,而满足不同机型的宽窄行分插机构需要设计不同参数的非圆锥齿轮。针对目前设计不同非圆锥齿轮需建立不同齿廓计算模型的问题,该文开展了基于样条曲线拟合封闭球面曲线的非圆锥齿轮大端齿廓数值计算方法研究,利用三次Nurbs曲线拟合方法建立了球面节曲线的统一表达式;根据齿形法线法和球面三角形性质建立了大端齿廓和齿根过渡曲线的数值计算模型,编写了基于Matlab的非圆锥齿轮大端齿廓计算程序;以一种步行式宽窄行分插机构的传动齿轮为例,当节点数取720时,齿槽齿厚差值可达到0.0037mm,可以满足加工要求;并在ADAMS软件中采用齿间加载接触力的方式...

Full description

Saved in:
Bibliographic Details
Published in农业工程学报 Vol. 29; no. 8; pp. 27 - 35
Main Author 孙良 祝宇 武传宇 赵匀
Format Journal Article
LanguageChinese
Published 浙江理工大学机械与自动控制学院,杭州 310018 2013
Subjects
农业机械
分插机构
数值分析
模型
球面齿廓
非圆锥齿轮
非圆锥齿轮
agricultural machinery
models
数值分析
模型
numerical analysis
分插机构
transplanting mechanism
球面齿廓
noncircular bevel gear
spherical tooth profile
农业机械
Online AccessGet full text
ISSN1002-6819
DOI10.3969/j.issn.1002-6819.2013.08.003

Cover

More Information
Summary:非圆锥齿轮传动是宽窄行分插机构实现空间插秧轨迹的重要组成部分,而满足不同机型的宽窄行分插机构需要设计不同参数的非圆锥齿轮。针对目前设计不同非圆锥齿轮需建立不同齿廓计算模型的问题,该文开展了基于样条曲线拟合封闭球面曲线的非圆锥齿轮大端齿廓数值计算方法研究,利用三次Nurbs曲线拟合方法建立了球面节曲线的统一表达式;根据齿形法线法和球面三角形性质建立了大端齿廓和齿根过渡曲线的数值计算模型,编写了基于Matlab的非圆锥齿轮大端齿廓计算程序;以一种步行式宽窄行分插机构的传动齿轮为例,当节点数取720时,齿槽齿厚差值可达到0.0037mm,可以满足加工要求;并在ADAMS软件中采用齿间加载接触力的方式得到了与理论计算结果相吻合的齿轮传动比,验证了该齿廓计算方法的正确性,从而实现了非圆锥齿轮的通用化设计,为行星轮系式的宽窄行分插机构、取苗机构、植苗机构等种植机械关键部件实现期望运动轨迹提供技术支持。
Bibliography:11-2047/S
Sun Liang, Zhu Yu, Wu Chuanyu, Zhao Yun ※ （College of Mechanical Engineering and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, China）
It is an important issue for a wide-narrow distance transplanting mechanism with planetary gear trains to obtain the spatial planting trajectory that meets the wide-narrow distance transplanting. A noncircular bevel gear transmission, one kind of spatial non-uniform velocity transmission mechanism could form such a trajectory. What is more, the pitch curve of the non-circular bevel gear is general, and a transplanting mechanism with this kind of bevel gears can achieve more potential spatial planting trajectories for wide-narrow distance planting than those with specific bevel gears such as an elliptical bevel gear or an eccentric-noncircular bevel gear. In order to meet diverse agronomic requirements, a variety of wide-narrow distance transplanting mechanisms and noncircular bevel gears with different parameters and pitch curves are needed. However, due to
ISSN:1002-6819
DOI:10.3969/j.issn.1002-6819.2013.08.003