近几年来,森林工业广泛利用集材拖拉机作为专用机械的座机。由于在拖拉机上安装了相当重的工艺设备而使牵引性和通过性变坏,因为增加了对土壤的单位压力,改变了机器重心的位置。因此,这种用作专用机械的座机的拖拉机需要对增加单位压力和改变重心位置无明显反应的行走系。 In recent years, the forest industry has made extensive use of the skidder tractors as landings for special machines. Traction and passing deteriorated due to the rather heavy process equipment installed on the tractor, as increasing the unit pressure on the soil changed the position of the center of gravity of the machine. Therefore, such a tractor used as a land machine for a special-purpose machine needs a traveling system that does not have a significant reaction to increase the unit pressure and change the position of the center of gravity.