Create a mechanism
We were tasked to create a mechanism for college. I wanted to choose a mechanism that would test me as a 3d modeller, and force me to improve at it.
I wanted to attempt to recreate a complicated mechanism.
I found this hummingbird mechanism with the purpose of transforming rotational movement to an oscillating movement.
I worked in fusion mostly to develop the design
These rough measurements is what informed the threaded rods in the design early on.
Threading the joints leaves room to make adjustments for better motion of the prototype
The first issue was trying to figure out the length and angles used in the design. I went through the video, and used different positions to make rough estimates of the positions.
Iterations were made and adjusted as needed on one working model. To keep track of what adjustments were made. A colour coding scheme was used to keep track of this.
White = 1st iteration
Black = 2nd iteration
Pink = 3rd iteration
other colours = 4+ iterations
Creating a securing bolt to prevent the cube holder deforming while attaching the small bolts
Below are a few developments I made to make this happen.
Insetting a locking double nut to make room in the wing bracket
several developments were introduced to improve movement of the pieces
Eventually though, I had a chassis that could hold it together. I made a test, and tried spinning it.
It didn’t even think about wanting to spin.
There were a lot of issues with the design that had be be fixed.
Discussing these problems with my professor, it was mentioned how inherently unbalanced the design for the chassis was. A more solid foundation would be needed.
Also showing the prototype to an engineering student friend of mine, he pointed out that a lot of my threaded rods were plastic, and the friction could be binding the mechanism together.
