The working principle of a merry-go-round mainly includes two parts: rotation and ups and downs.
The merry-go-round rotates through a gear transmission. There is a large gear on the top of the center rod, which is connected to the wooden horse through a transmission. When the large gear runs in a circle, it drives all the shafts to rotate, so that the wooden horse rotates around the center axis. This transmission usually uses a crown gear, which is small in size, simple in structure, and transmits large torque. It can "slip" when overloaded, which plays a role of self-protection.
