Grashoff

Grashoff - Grashoff’s Law Consider a four-bar-linkage....

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Unformatted text preview: Grashoff’s Law Consider a four-bar-linkage. Denote the smallest link by S , the longest link by L and the other two links by M 1 and M 2 . If L + S < M1 + M 2 , then depending whether S is connected to the ground by one end, two ends, or no end, the mechanism has the following type: S Crank-Rocker Crank-Rocker S Crank-Crank S Rocker-Rocker If L + S > M1 + M 2 , then the mechanism is of a rocker-rocker type. Example. With r1 = 2 , r2 = 7 , r3 = 6 , r4 = 4 we have a crank-crank type of motion. With r1 = 7 , r2 = 2 , r3 = 6 , r4 = 4 we have a crank-rocker type of motion. After Notes in Kinematics Y.M. Ram ...
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