Design a four-bar mechanism such that \theta_{12}=120^{\circ}, \theta_{13}=160^{\circ} \text { and } \phi_{12}=70^{\circ}, \phi_{13}=100^{\circ} . Input link rotates clockwise and output link also rotates clockwise. A length of fixed link is 5 cm.
Question 16.7: Design a four-bar mechanism such that θ12=120°, θ13=160° and...
Refer to Fig.16.21.
\theta_{12} / 2=\frac{120}{2}=60^{\circ}, \phi_{12} / 2=\frac{70}{2}=35^{\circ}, \Psi_{12}=\frac{1}{2}\left(\theta_{12}-\phi_{12}\right)=25^{\circ} .
\theta_{13} / 2=\frac{160}{2}=80^{\circ}, \phi_{13} / 2=\frac{100}{2}, \Psi_{13}=\frac{1}{2}\left(\theta_{13}-\phi_{12}\right)=30^{\circ} .
\text { 1. Draw } O _{2} O _{4}=4 cm \text {. Rotate } R_{12} \text { and } R_{13} .
\text { 2. Construct angles } \psi_{13} \text { and } \psi_{12} \text { at } R_{12} \text { and } R_{13} respectively such that the arms of the angles intersect at points A and B. Join AB to get the coupler.
\text { 3. Join } O_{2} A \text { and } O_{4} B to get the input and output links respectively.
\text { 4. } O _{2} ABO _{4} is the required mechanism.
Related Answered Questions
Procedure:
First limit position
1. Draw points A a...
Consider a four-bar mechanism as shown in Fig.16.1...
\cos \theta_{1}=\cos 25^{\circ}=0.9063, \c...
x_{i}=1, x_{f}=11, n=3 .
Using Che...
\text { 1. Draw } O_{2} O_{4}=4 cm \text {...
Refer to Fig.16.23
\text { 1. Draw two par...
The Freudenstein’s equation for the four-bar mecha...