Transmission Shafts and Keys
Shafts are rotating machine element, circular in cross section, which supports transmission elements like gears, pulleys and sprockets and transmits power.
Gears
Gears are toothed wheels that are used to transmit constant angular velocity ratio between two shafts. These shafts can be parallel, intersecting or non-intersecting.
Type of Gear Trains: Simple Gear Train (SGT) Compound Gear Train (CGT) Reverted Gear Train (RGT) Manual Transmission Gear Box (Synchromesh Unit) Machine Tool Gear Box (Slide Cluster) Epicyclic Gear Train (EGT) Differential Gear Train (DGT)
Gear Trains
Epicyclic Gear Trains
If the rotation of one or more gears is allowed to rotate about another axis, the gear train is known as Planetary or Epicyclic Gear Train.
Belt Drives
Belts are made of flexible material and are looped over pulleys to transmit power between shafts.
V-belt Design
V-belts transmits higher torque because of the trapezoidal cross-section running on pulleys with grooves to match the belt. The normal angle between the sides of the groove is 40 degrees. V-belts operates satisfactorily at speeds between 5 to 3 m/s but the maximum efficiency is obtained at speeds between 20 to 25 m/s.
Chain and Sprockets
Chain Drives, like gear and belt drives, are used to transmit power from one shaft to another. In general, chain drives are less efficient and durable than gears, but they offer greater power transmission durability, and longer service life than belts especially at high temperatures.
Power Screws
Power screw is a mechanical device used for converting rotary motion into linear motion and transmitting power. Power screw is also known as translation screw.