Lifting Machines:

Lifting machines are the devices which are utilized for materials handling in the industries. They are used for shifting heavy components, heavy machines, etc. from one place of shop to the other place. They are utilized in loading and unloading cargo for ships at the harbours. Even for loading and unloading heavy loads in goods trains lifting machines are used. In a simple lifting machine, the effort is applied at one point of the machine and the heavy load is lifted at the other point of the machine. The peculiarity of a lifting machine is that by applying smaller force, large loads may be lifted.

Objectives

After studying this unit, you must be able to understand

• basic theoretical background of simple lifting machines,
• pulleys and system of pulleys,
• differential wheels and axle, and
• Worm and worm wheel.