Helix torus joint.
The green crank is input. The yellow torus cam is fixed. It has a helix groove of two rev.. The red bushes are output. They have blue pins sliding in cam groove.
1 rev. of the green crank corresponds 2 rev. of the red bushes. This mechanism may be applied for park rotating equipments.
STEP files of this video:
http://www.mediafire.com/download/btbosakqx4yrsdk/TorusTrans2STEP.zip
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