With the development of the economic level in recent years, large clocks have gradually become popular with the public, not only using its timing function, but also when the decoration. But what do you know about large timepieces? Large clocks have a variety of structural forms, but the working principle is basically the same. The watch is mainly composed of the primary drive system, the transmission system, the escapement governor, the pointer system and the upper bar needle system. Let's take you to understand the structure of a large clock.
Prime system
A mechanism for storing and transmitting working energy, usually consisting of a box wheel, a box cover, a shaft, a spring and a spring hook. A spring in the free state is a spiral or S-shaped spring. It has a small hole in the inner end, which is fitted to the hook of the shaft. Its outer end is hooked on the inner wall of the box wheel through the spring external hook. When winding up, the spring is tightened on the shaft by rotating the shaft through the upper needle system. The elastic action of the spring causes the box wheel to rotate, thus driving the drive train.
Power train
A set of transmission gears that transfer the energy of the primary drive to the escapement governor. It is composed of two wheels (center wheel), three wheels (over wheel), four wheels (second wheel) and escapement wheel tooth shaft. Among them, the wheel plate is the driving gear, and the tooth shaft is the driven gear. Most of the tooth shapes of the clock transmission system are modified cycloidal tooth shapes made according to the principle of theoretical cycloid.
Escapement governor
It relies on the periodic vibration of the vibration system (balance spring or pendulum) to maintain accurate and regular intermittent movement of the escapement, so as to achieve speed regulation. There are many kinds of escapement governor, and the fork type escapement is the most widely used escapement.
