We have a pneumatic testing station for cyclic tests on consumer goods of various ilk. Positioning and alignment has been a cumbersom task. I'd like to attach the air cylinder at each end to struts. The front would have two struts, the rear three struts. Problem is: three ball joints can't occupy the same center, leading to twisting moments between the three struts. Are there any products that incorporate four struts into a ball joint (three supports and one to the cylinder) with intersecting lines of force?
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Ball Joint with Four or more 3DoF links
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