2K─H行星传动的极限传动比

Survey on the Limiting Transmission Ratio of 2K─ Planetary Gear Trains

在行星轮系机构综合中，研究行星轮数目与极限传动比的关系有着极其重要的意义。本文根据２Ｋ─Ｈ行星轮系机构的同心条件、安装条件和邻接条件，采用统一的符号，对满足上述条件的所有（六种）２Ｋ─Ｈ行星轮系机构，导出了行星轮个数与极限传动比的统一关系式，得到了所有２Ｋ─Ｈ行星轮系机构的极限传动比计算公式，为２Ｋ─Ｈ行星轮系机构的综合提供了理论根据。

On the synthesis of planetary gear trains,it is very important to know the relation between the number of planets and the limiting ratio considering the three geometric constraints: the same central, assembly and abjacent conditions,this paper has derived the expression of the number of planets and the limiting ratio via uniform symbols which is suitable for all the six type of planetary gear trains,and obtained the formula to evaluate the limiting ratio.