Anyone who knows about crawler excavators knows that the walking and work of excavators are all done by hydraulic pressure. Some people may ask, why tanks can walk so fast while walking on crawlers, but excavators only Can you walk slowly?
This is the difference in the power output system. The tank is mechanically rigidly connected to travel. Like the driving method of a car, the relationship between power and speed is coordinated by switching gear sets through the gearbox, while the excavator is driven by hydraulic pressure. It does not mean that hydraulic drive is necessarily slower than mechanical transmission, but it is determined by work requirements. The so-called demand determines production. The excavator does not need high walking speed when it moves, but requires a large driving force, so the excavator uses a column. Plug-type drive motor, the biggest feature of this hydraulic drive motor is the output of low speed and high torque.
