GATE ME 2014 Set 2 — Question 18
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Theory of Machines & Vibrations → Mechanisms & Linkages → Four-Bar & Slider-Crank
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Question
A 4-bar mechanism with all revolute pairs has link lengths , , and . The suffixes 'f', 'in', 'co' and 'out' denote the fixed link, the input link, the coupler and output link respectively. Which one of the following statements is true about the input and output links?
Correct answer
(A) Both links can execute full circular motion
Solution
According to Grashof's criterion for a 4-bar mechanism:
Check the condition:
Since the condition is satisfied, it is a Grashof chain. In a Grashof chain, if the shortest link is fixed, the mechanism is a double-crank mechanism. This means both the input link and the output link can execute full circular motion.
Check the condition:
Since the condition is satisfied, it is a Grashof chain. In a Grashof chain, if the shortest link is fixed, the mechanism is a double-crank mechanism. This means both the input link and the output link can execute full circular motion.
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