Gear is a commonly used mechanical transmission element, which realizes force transfer and conversion by meshing and rotating between teeth. Its working principle mainly includes the following aspects: gear meshing principle: When two gears mesh with each other, they transfer power through the relative motion between teeth. Specifically, when a pinion (also known as a driven gear) engages with a large gear (also known as a drive gear), the pinion rotates faster and the torque is smaller, and the large gear rotates slower and the torque is larger. In this way, through the coordination of gears, the speed change and torque amplification or reduction can be achieved. Gear ratio: The transmission ratio refers to the number of revolutions of the driven gear for each revolution of the driving gear. The transmission ratio can be calculated according to the parameters of the gear module and the number of teeth. For example, if the number of teeth of the driving gear is 20 and the number of teeth of the driven gear is 40, then the transmission ratio is 1:2, which means that for every revolution of the driven gear, the driving gear turns twice. Gear transmission efficiency: gear transmission efficiency refers to the ratio of input power to output power. Under ideal circumstances, the efficiency of gear transmission can reach more than 90%, but in fact, due to the influence of gear manufacturing and matching accuracy, lubrication state and other factors, the transmission efficiency will be slightly reduced. Mechanical characteristics of gear: The mechanical characteristics of gear mainly include gear module, gear tooth surface hardness, gear material, etc. These parameters determine the strength and life of the gear and ensure the reliability and stability of the gear drive. In short, the gear achieves the transmission and conversion of power through the meshing and rotation between the teeth, and is widely used in various mechanical devices.
