STEERING SYSTEM FOR A TRUCK-LAYING VEHICLE

摘要

A compact steering system with a differential mechanism, suitable for a track-laying vehicle on which the engine is mounted sideways, is provided. The steering system for track-laying vehicles having an input shaft (11) connected to an output shaft (3a) of a transmission and output shafts (20a, 20b) for transmitting power respectively to driving wheels (6a, 6b) of right and left caterpillar bands in order to enable the track-laying vehicle to turn by changing speed of one of the output shafts (20a, 20b) by a hydraulic motor (40) is characterized in that the input shaft (11) is inserted through a hollow shaft (25) on which each sun gear (13, 18, 26) of first, second and third planetary gear mechanisms (37, 38, 39) is fixedly installed, and an end of the input shaft (11) is connected to a planetary carrier (12) of the first planetary gear mechanism (37), and a ring gear (19) of the second planetary gear mechanism (38) is connected to the hydraulic motor (40), and a planetary carrier (16a) of the second planetary gear mechanism (38) is connected to a ring gear (15) of the first planetary gear mechanism (37) and one output shaft (20b), and a ring gear (30) of the third planetary gear mechanism (39) is fixed on a case (35), and a planetary carrier (28) of the third planetary gear mechanism (39) is connected to the other output shaft (20a).