One reader of The Automata / Automaton Blog wrote to me with an interesting question. He wrote: "I'm looking for a simple mechanism to convert rotational motion to reciprocal motion along the SAME axis as the rotation, not perpendicular."
I decided to investigate potential solutions in one of my favorite books on mechanisms, Five Hundred and Seven Mechanical Movements. Below are some of the solutions I found listed by the numbers that appear in my copy of the book (Astragal Press, 1995).
- 95. Oblique disc imparting rectilinear motion to rod resting upon its surface
- 106. & 107. Uniform reciprocating rectilinear motion produced by rotary motion of grooved cams
- 136. Crown tooth gear with rod pressed against rim
- 143. Sliding worm screw and toothed wheel
- 165. Circular to rectilinear motion via waved-wheel (or cam)
- 167. Drum or cylinder with endless groove and follower
- 237. Crown-ratchet (driven by crown, not pawl)
- 272. Beveled disc with follower on its circumference.
- 351. Partially toothed pinion and rack with return mechanism
I have probably missed a few in the book, and there are certainly many more possible solutions.
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