Bulldozers can be classified according to the following aspects:
1, according to the walking mode can be divided into the following two types:
1) Crawler bulldozer: large traction force, small ground pressure, strong climbing ability, superior performance, is a multi-purpose machine.
2) Wheeled bulldozer: fast driving speed. Good mobility, short working cycle time, convenient and rapid transfer, no damage to the ground, especially suitable for urban construction and road maintenance projects. Because of its low manufacturing cost and convenient maintenance, it has been greatly developed in recent years. However, the adhesion performance is far from the desired belt bulldozer, which is easy to cause the drive wheel to slip during the construction of soft and wet sites, and may cause the vehicle to sink in serious cases due to low production efficiency; When mining, the surrounding rock is hard and sharp, which is easy to cause tire wear, so the scope of use of wheeled bulldozers is limited to a certain extent.
2, according to the dodging plate installation form can be divided into the following two kinds;
1) Fixed shovel bulldozer: the bulldozer shovel blade is fixed at a right Angle to the longitudinal axis of the host machine, also known as the shovel type bulldozer. Its mechanism is simple, but it can only push earth in the forward direction, and the operation flexibility is poor, and it is only used for small and medium-sized bulldozers.
2) Rotary shovel bulldozer: the bulldozer shovel blade can rotate at a certain Angle in the horizontal plane, and the longitudinal axis of the host can be installed into a fixed right Angle or non-right Angle, also known as Angle shovel bulldozer. This kind of bulldozer has a wide range of operation, which is convenient for moving soil to a still and digging side ditch.
3, according to the transmission mode bulldozer can be divided into the following types:
1) Mechanical drive bulldozer: The bulldozer with mechanical drive is reliable, simple to manufacture, high transmission efficiency, convenient to repair, but laborious to operate. The self-adaptability of the transmission device to the load is poor, which is easy to cause the engine to stall and reduce the working efficiency.
2) Hydraulic mechanical drive bulldozer; The combined transmission device of hydraulic torque converter and power shift transmission has the ability to automatically adapt to external load changes by stepless speed change and torsional change. The engine is not easy to stall, the load can be shifted, the number of grades is small, the 6g vertical light, and the operation efficiency is high, which is the transmission form of modern large and medium-sized bulldozers. The disadvantage is that the hydraulic shortener is used, the transmission efficiency is low, the transmission structure is complex, and the manufacturing and maintenance cost is high.
3) Full hydraulic drive bulldozer: driven by hydraulic motor, the driving force is directly transmitted to the walking mechanism. Because there is no main off-platform device, transmission, drive axle and other transmission components, compact structure, convenient overall layout, light weight of the whole machine, simple operation, can achieve in place steering, but the full hydraulic bulldozer manufacturing cost is high, durability and reliability is poor, currently only used in medium power bulldozer.
4) Electric drive bulldozer: the mechanical energy output of the diesel engine is first converted into electrical energy, and the motor is driven by the cable. And then drive the walking device and the working device. It has the advantages of compact structure, convenient overall layout and flexible operation, and can realize stepless speed change and in-place steering of the whole machine. But the whole machine quality is large. The manufacturing cost is high, and it is currently only used in a few high-power wheeled bulldozers.Bulldozer
