What is the structural schematic diagram and motion principle of Trojan horse in Zhuge Liang's Trojan horse map?

The structural diagram of the Trojan Horse (wooden cow) in Zhuge Liang's Trojan Horse Plan is as follows:

The movement principle of wooden horse (wooden cow) in Zhuge Liang's Mumaji: the car itself is a lever with the shaft as the fulcrum. When people press the axle to lift it, the car will move up and down like a seesaw, and the operator will not exert any force. When a person presses the iron shaft in front, the shaft on the car body will drag the wooden pole forward, and when the iron shaft is lifted, the wooden pole will support the ground and make the car move forward like a gondola. So the shuttle goes straight ahead.