Variomatic Gears is a set of gears with a varying gear ratio. At first, both gears make a quarter turn, which corresponds to a 1:1 gearing ratio. Then, one gear turns by 90 degrees, while the other turns by 180 degrees, corresponding to 1:2. Next the roles reverse to 180:90, which is 2:1. So this set of gears could be described as having a 1-1-2:1-2-1 gearing ratio. The total adds up to 360:360, so the two gears have a 1:1 gearing ratio at average.
This gearing mechanism was inspired by the Heart-Shaped Gears
jewels by Guofeng Guan
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11.674 w x
7 d x
4.596 w x
2.756 d x