Ji Li Drum Cart

The Ji Li Gu Che is an ancient Chinese carriage used to record the distance traveled by vehicles, invented around the Wei and Jin dynasties. There are two wooden figures on the Jili drum cart, named after the device that allows them to hit the drum once while traveling one mile. It can automatically report mileage, similar to a modern vehicle counter. The drum car is equipped with a three-stage gear reduction mechanism inside, which transmits the rotation of the wheels to the wooden figures on the body through the meshing of gears, thus achieving one drum per mile and one bracelet per ten miles. Rotate the wheels and observe the operation of the three-stage gear reduction mechanism to understand the working principle of the drum car.

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.