Pantograph

The exhibit will consist of a pantograph mechanical device and an LED screen. The mechanical interaction device includes a movable pantograph model and a contact wire track. The pantograph model will focus on showcasing the current mechanical structure of the pantograph and the process of raising the pantograph. The pantograph is equipped with a motor and a track, which will move forward and backward along the track, vividly demonstrating the laying relationship between high-voltage wires and train tracks - the zigzag laying of high-voltage wires. Visitors can intuitively see that the carbon slider of the pantograph maintains uniform friction with the high-voltage wires, reducing losses. The LED screen will be linked with the buttons and progress indicator lights on the table. After pressing the start button, the progress indicator lights will light up in one step, including the steps of raising the pantograph, connecting to the contact network, delivering current, and driving the train forward. The LED screen will assist in explaining the process.

The unit is designed for unsupervised public use: controls are recessed or shielded, moving parts are enclosed, and the interface is operable by a child of about six with no instruction. Where a screen is used, the language can be switched without changing the hardware, and the content can be replaced on site.

The pantograph takes high voltage electricity from the overhead contact system and sends it into the vehicle. The electricity is first reduced to a suitable voltage through the main transformer, and then converted into electricity that can be used by the motor through the traction inverter, driving the traction motor to drive the wheels forward. When driving at high speeds, the bow feels shaky and the contact is unstable. The double four-bar linkage keeps the skateboard level during lifting, buffers vibrations, and evenly applies pressure, making contact more stable and reducing bow jumping and instantaneous power outages. The wire follows the character "zhi" to move the contact point of the skateboard left and right. Wear and tear are more dispersed, durable, and less prone to arcing and sparking. Carbon (graphite) composite materials have good conductivity, low friction, and self-lubricating properties. Skateboards are replaceable wear parts. First, grind the skateboard to protect the more expensive and difficult to repair contact wire.