Input: pink gear.
Output: green gear.
This is a constant velocity joint
The torus gear was created on computer by bending a round rack of circular teeth.
The spur gear drive (its transmission ratio = -1) ensures the meshing takes place at equal circles of the torus gears.
Angle between the input and output shafts can be adjusted by turning the blue bearing.
The video was inspired from:
https://www.youtube.com/watch?v=Sg5znXqimyU
آی-ویدئو