Most crawler bulldozers with power greater than 120KW adopt hydraulic mechanical transmission. This bulldozer comes from three basic manufacturing technologies, D 155, D85 and D65, introduced by Komatsu Company of Japan. After localization, it is shaped into TY320, TY220 and TY 160 basic bulldozers. In order to meet the needs of users under various working conditions, China bulldozer manufacturers have expanded their products on the basis of the above three basic bulldozers and formed three series. TY220 bulldozer series products include TSY220 wetland bulldozer, TMY220 desert bulldozer, TYG220 plateau bulldozer, TY220F forest logging bulldozer, TSY220H sanitation bulldozer and DG45 pipe hanger. TY320 and TY 160 series bulldozers are also developing similar series products. TY 160 series also includes TSY 160L ultra-wetland bulldozer and TBY 160 scraper.
The development and expansion of bulldozer products should not only meet the working adaptability of different working conditions, but also maintain the maximum universality (or interchangeability) of parts with basic models, which brings great convenience to users' use and maintenance. In order to facilitate users to purchase accessories, manufacturers keep the part number of Komatsu Company in Japan, and only the parts designed by themselves have their own manufacturer number in the modification.
Crawler bulldozer is mainly composed of engine, transmission system, working device, electrical part, cab and hood. Among them, the mechanical hydraulic transmission system includes hydraulic torque converter, coupling assembly, planetary gear power shift transmission, central transmission, steering clutch and steering brake, main reducer and walking system.
The power output mechanism drives the working pump in the hydraulic system of the working device, the variable speed pump in the variable speed and torque hydraulic system and the steering pump in the steering brake hydraulic system through gear transmission and spline connection; Sprocket represents the final transmission mechanism of two-stage spur gear transmission (including left and right final transmission assemblies); The track shoe comprises a walking system, which comprises a track assembly, a bench and a suspension assembly.