Rzeppa joint 1

Red bar and yellow shaft create a joint of class II (allowing four degrees of freedom).
Red bar and green shaft create a joint of class II.
Red bar and blue retainer create a spherical joint.
With this arrangement, the plane containing ball centers almost always remains in a plane that bisects the angle α between the two shafts when α changes. See: "Slider crank and coulisse mechanism 1"
• Slider crank and couli...
The video shows the transmission when α is 0 deg. and then 30 deg.
The output shaft rotates nearly regularly with max error of 1.5% at α = 30 deg.
STEP files of this video:
www.mediafire.c...
Inventor files:
www.mediafire.c...

[@user-pv5yh4de6f]

기계원리가 대단하십니다

[@laurinebonin1797]

trop bien

[@oafak]

Question: Apart from the need to share the loads evenly, Is there any other reason for the Rzeppa joint to have the balls fixed to the bisector plane at all times? I have done this by allowing the balls to move at a perpendicular plane to one shaft while gaining ALL the inclination from sliding motions in the second shaft. This also seems to produce constant velocity. Please let me know your view.

[@Asuryante]

So, i'm sorry if this answer comes late, but i've just seen your comment. The thing is: by having the balls fixed to the bisector plane, the joint is HOMOKINETIC, which means that its trasmission ratio is 1.

[@sebastianjasiecki1876]

Hey, can you tell me what program did you use to make it?

[@thang010146]

It is Autodesk Inventor.

[@2wordU]

What is the red element?

[@thang010146]

It is called pilot lever.
For more see
patents.google.com/patent/US2010899A/en