ABSTRACT
This type of most often used negative-ratio (i 0 < 0, Section 2.3 and Figure 2.4) planetary gear train (PGT) (Figure 3.1) is signified in different ways. In many countries, the Kudryavtsev’s designation 2K-H is popular. It means two central gears (2K) and a carrier (H) [147–149]. In this book, Prof. Tkachenko’s designation is used [236] as more detailed one (A for external and I for internal meshing; see Section 2.1).
