Speed-change/steering system for crawler type vehicles

摘要

A novel speed-change/steering system for crawler type vehicles comprises first and second stepless speed changers and a plurality of planetary gear assemblies disposed along one axis. First and second output shafts of the system are connected to respective elements of any two of the planetary gear assemblies. The input shafts of the first and second stepless speed changers are coupled to a power source, and the output shafts of the first and second stepless speed changers are connected to the planetary gear assemblies. One of the planetary gear assemblies is coupled to the power source. There is provided at least one clutch for fixing at least one element in the planetary gear assemblies. Also there are provided means for connecting elements of adjacent planetary gear assemblies.