Explain the working of centrifugal clutch with neat sketch.
• A centrifugal clutch is a clutch that uses centrifugal force to connect two concentric shafts, with the driving shaft nested inside the driven shaft.
• It consists of number of shoe on the inside of a rim of pulley. The outer surface of pulley is covered with friction material.
• These shoes move radially in guides.
• As the speed of the shaft increase, the centrifugal force on the shoes increases.
• When the centrifugal force is less than the spring force, the shoes remain in the same position as when the driving shaft was stationary, but when the centrifugal force is equal to the spring force, the shoes are just floating.
• When the centrifugal force exceeds the spring force, the shoes move outward and come into contact with the driven member presses against it.
• The force with which the shoe presses against the driven member is the difference of the centrifugal force and the spring force.
• The increase of speed causes the shoe to press harder and enable more torque to be transmitted.