I want to design a system of linkages that will allow me to rotate the green element around the blue point/axis without entering the red circle.
The green triangle to go fully around the blue point. I only need about 120 degrees.
I have seen examples of it being done (some provided below).
I don't want to build a robot arm :), so it has to be purely mechanical, preferably with only one rotating axis as an input.
What is this idea/mechanism/process called? I have trouble googling for it. Is there some kind of solver that would help me find relative lengths of all the linkages, etc.?
Elephant Compliant Mechanism https://youtu.be/iAVV_7k79ZI?t=15
Six-bar linkage for stretch and turn https://www.youtube.com/watch?v=q8tVdjMo22E