Gear set

Scientific Enlightenment:

The origin of gears can be traced back to the Ptolemaic Dynasty of ancient Egypt around the 2nd and 3rd centuries BC. At that time, spherical gears or bevel gears were often used to drive a rudimentary gear set resembling a 'lantern'. The small gear set was made up of two simple wheel rings connected by bar or lattice cages, with the ends of the wheel rings loosely engaged by gears. In Europe, Asia, and Africa, gear-driven water-lifting devices were widely used, and for many centuries, many villages only had one set of gears.But approximately around 1000 BCE1In the century, it was recognized that a gear could be used to combine a horizontal water mill with a vertical water wheel (two later inventions); when Vidalocius described the use of a vertical water wheel, end-gear, and a 'lantern' to drive a water mill, he was the first to introduce us to the concept of a gear. The spread of this type of water mill was slower than that of a horizontal mill, but in the early Middle Ages, at least in certain densely populated areas of lowland Europe and in certain parts of the Muslim world, it was a common method for grinding flour.

Now that we understand the origins of gears, let's get our hands dirty and make a set of small gears together.

Scientific Principles:

Gear transmission is a form of power transmission.The principle of gear transmission is very simple. That is, a pair of gears with the same module (the shape of the teeth) mesh together to transfer power from one shaft (the input shaft) to another (the output shaft), completing a way to transfer power.Its features are: reliable power transmission, and the speed ratio can be changed by adjusting the relative tooth numbers.

Science Project:

1Recognize and prepare the necessary materials for the experiment.

2Install in sequence according to the instructions.

Three,Installation completed and debugging is underway.

Science Expansion:

Gear transmission is a mechanical transmission that uses the teeth of two gears to mesh together to transfer power and motion. It is classified into parallel axis cylindrical gear transmission, intersecting axis cone gear transmission, and intersecting axis spiral gear transmission based on the relative position of the gear axis. It has features such as compact structure, high efficiency, and long life.   Gear transmission refers to a device that directly and indirectly transfers motion and power between the main and auxiliary wheels through their teeth.   In all mechanical transmissions, gear transmission is the most widely used, capable of transmitting motion and power between two shafts that are not far apart in relative position.The characteristic of gear transmission is: gear transmission is smooth, the transmission ratio is precise, the working is reliable, the efficiency is high, the service life is long, and the power, speed, and size range are large. For example, the transmission power can range from very small to tens of thousands of kilowatts; the speed can reach the highest.300 meters per secondThe gear diameter can range from a few millimeters to over twenty meters. However, the manufacture of gears requires specialized equipment, and meshing transmission can generate noise.