Lecture.no 3_ Machine Dynamics_ch2
22
• Linkage isomers : links have various nodes available to connect to other links' nodes. • Depending on the particular connections of available links, the assembly will have different motion properties. • The number of isomers possible from a given collection of links is far from obvious. • In fact the problem of mathematically predicting the number of isomers of all link combinations has been a long-unsolved problem. • Table 2-3 shows the number of valid isomers found for one-DOF mechanisms with revolute pairs, up to 12 links.
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Transcript of Lecture.no 3_ Machine Dynamics_ch2
• Linkage isomers : links have various nodes available to connect to other links' nodes.
• Depending on the particular connections of available links, the assembly will have different motion properties.
• The number of isomers possible from a given collection of links is far from obvious. • In fact the problem of mathematically predicting the number of isomers of all link
combinations has been a long-unsolved problem. • Table 2-3 shows the number of valid isomers found for one-DOF mechanisms with
revolute pairs, up to 12 links.
F2.15 a
F2.15 b
F2.15 c
F2.16
there are three possible configurations, as shown above. The parallelogram linkage may switch (uncontrollably!) to the anti-parallelogram linkage if care is not taken to prevent this.
