摘要
中国古代指南车是轮系机械及自动机械的先驱,在机械科技发展史上具有特殊的地位,目前复原的指南车结构种类繁多,存在齿轮数目多、结构复杂而定向精度差和操纵繁难的问题.基于指南车的原理,运用差动轮系设计了一个结构简单、仅有8齿轮的新型较高精度的指南车定向机构;从齿轮传动的机械原理上分析及证明了该机构的机械定向功能;并进行了系统传动误差的分析,导出了定向机构系统误差与齿轮副传动误差的关系式;得到了尽可能减少齿轮副是提高指南车定向机构精度的重要途径.
Chinese ancient south-pointing carriage is commonly regarded as a milestone in the development of gear train mechanism and automation. Nowadays many types of structure of south-pointing carriage have been recovered and restored. However, there still remain many problems, such as inconvenient manipulation and poor orientating accuracy caused by multiple gears and complex structure. Based on the principle analysis of south-pointing carriage, the differential gear train is used in the new orientating structure of south-pointing carriage, which has higher accuracy and simple structure with only 8 gears. The mechanical orientating function of the new orientating structure is analyzed based on the mechanical principle of gear transmission. The structure system transmission error is analyzed, and the mathematical relationship between orientating structure system error and transmission error of gear pairs is derived. The results revealed that reducing the number of gear pairs is the effective approach to improve accuracy of orientating structure.
出处
《浙江工业大学学报》
CAS
2008年第5期565-567,582,共4页
Journal of Zhejiang University of Technology
关键词
指南车
新型定向机构
差动轮系
系统误差
south-pointing carriage
new orientating structure
differential gear train
system error
