一、结构型式目前,国内外绝大多数履带推土机的中央传动采用“一轮二承”制的结构型式。即被动锥齿轮用螺栓固定在中央传动轴的凸缘上,轴通过锥形滚子轴承支承于后桥箱体隔板上;轴两端的锥形渐开线花键分别与左、右转向离合器主动鼓联接;主动锥齿轮大多与变速箱的输出轴制成一体,并由轴支承于变速箱的两端,呈悬臂状。如日本Komatus的D 80-7、D80A-12、D155A-1、D85S-12,Cater- First, the structure type At present, most of the domestic and foreign track bulldozers in the central drive adopts a “two rounds” system structure. That is, the passive bevel gear is bolted to the flange of the central transmission shaft, and the shaft is supported on the bulkhead of the rear axle box through a tapered roller bearing; the tapered involute splines at both ends of the shaft are respectively connected to the left and right steering clutches. Active drum connection; most of the active bevel gears are integrated with the output shaft of the gearbox, and are supported by the shaft at both ends of the gearbox and are cantilevered. Such as Japan’s Komatus D 80-7, D80A-12, D155A-1, D85S-12, Cater-