The bulldozer is a main type of earthmoving machinery. It is divided into crawler type and tire type according to the walking mode. Because there are fewer tire type bulldozers. This article mainly describes the structure and working principle of the crawler bulldozer. The basic operations of bulldozer excavation are: A. Shovel B. Earthmoving C. Unloading soil.
Most of the track-type tractors with a power greater than 120 kW use hydraulic-mechanical transmission. This kind of bulldozer comes from the introduction of the three basic bulldozer manufacturing technologies of D155, D85 and D65 from Komatsu, Japan. After localization, it is shaped as a basic bulldozer of type TY320, TY220 and TY160. In order to meet the needs of users in various working conditions, China's bulldozer manufacturers have expanded their product varieties based on the above three basic bulldozers and formed three series of bulldozers. TY220 bulldozer series products, including TSY220 wetland bulldozer, TMY220 desert bulldozer, TYG220 plateau bulldozer, TY220F forest logging bulldozer, TSY220H sanitation bulldozer and DG45 pipelayer. The TY320 and TY160 series of bulldozers are also expanding into similar series. The TY160 series also includes the TSY160L super wetland bulldozer and the TBY160 pusher.
The development and development of bulldozer product types must meet the work adaptability of different working conditions, and must maintain the maximum component versatility (or interchangeability) with the basic model, which will bring extremes to the users. Great convenience. In order to facilitate the purchase of accessories, the manufacturer has retained the parts number of Komatsu Corporation of Japan, and only the parts designed by the company in the modification have been numbered by their own manufacturers.
The crawler bulldozer is mainly composed of an engine, a transmission system, a working device, an electric part, a cab and a hood. Among them, mechanical and hydraulic transmission systems include hydraulic torque converters, coupling assemblies, planetary gear-type power shift transmissions, central transmissions, steering clutches and steering brakes, final drives and travel systems.
The power output mechanism drives the working pump, the variable speed torque hydraulic system variable speed pump and the steering brake hydraulic system steering pump in the hydraulic system of the working device by means of gear transmission and spline connection; the sprocket represents the final transmission mechanism of the secondary spur gear transmission (including left and right final drive assemblies); the track shoe includes a track assembly, a frame and a suspension assembly.
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