One of the major applications of gears is gear reduction. The high power and low torque of the supply can be converted into high torque by coupling of a smaller input gear with a larger gear. There are different types of gear reducers depending on the types of gears coupled viz. worm gear reducer, spur gear reducer, bevel gear reducer etc.
Construction of a Bevel Gear Reducer
A bevel gear reducer consists of a small gear acting as a pinion coupled with another gear of a larger diameter at right angles to each other. The gears can be either of spur or helical type. Helical gears are preferred as they are less noisy due to gradual engagement. The material can be either plastic or metal depending on the application. Three gears can be used in case we need to keep the axis of rotation the same as that of input. The whole arrangement is sealed in a metal or plastic casing known as housing. The point of contact is lubricated with gear oil.
Working of a Bevel Gear Reducer
The diameter of the output being larger than that of the input gear, the torque of the system is increased at the expense of speed. Since the speed is decreased, this system is known as a reducer. The gears are at right angles to each other and hence the direction of the rotary motion is changed.
Advantages of a Bevel Gear Reducer
The efficiency of a bevel gear reducer is higher than that of a typical worm gear reducer. The bevel gears have high load capacity.
Applications of a Bevel Gear Reducer
Due to change in direction of the rotary motion the bevel gear reducer finds a variety of applications in industry and automotives. In industries it is used in turbines, pumps, cranks, etc. In automotives it is used in ordinary as well as limited slip differentials.