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Explain any two of the following: Pulley drive system, Ratchet and pawl, Pop riveting, Enameling. - Leaving Cert Engineering - Question 1 - 2012
Question 1
Explain any two of the following: Pulley drive system, Ratchet and pawl, Pop riveting, Enameling.
Worked Solution & Example Answer:Explain any two of the following: Pulley drive system, Ratchet and pawl, Pop riveting, Enameling. - Leaving Cert Engineering - Question 1 - 2012
Step 1
Pulley drive system
Answer
A pulley drive system is utilized to transmit motion and force from one shaft to another by a pair of pulleys and belts. Common applications include machines such as sewing machines, pin printers, and washing machines that employ round pulleys and rubber belts. These systems function by using various belts to transfer motion from a motor spindle to a drive axle on various projects, including assembly lines and conveyor systems.
Step 2
Ratchet and pawl
Answer
A ratchet and pawl mechanism consists of a ratchet wheel and a pawl lever that allows movement in one direction while preventing it in the opposite direction. The teeth on the ratchet wheel are specially shaped to engage the pawl, which can rotate the shaft forward but restricts movement backward, allowing machines such as ratchet spanners and wrenches to function effectively.