How to remove rotational degrees of freedom in an assembly for rods connected by a ball mate

david_beaven

So this is mostly constrained but the 4 rods can rotate.  Not sure how to fix this.
https://cad.onshape.com/documents/9700f1052eade11e8eadf6ee/w/2250f0f1a1f623da42203c25/e/f933c2192a2b854bade0b8bf
Thanks

GWS50

In the real world the rods would rotate so perhaps you might need to model it with universal joints at the ends of the rods.
Alternatively....and this is a cheat and can trip you up when producing the item,,,,,I sometimes model a tiny flat into the bar and set that to be parallel to another fixed face. Not ideal, but gets a quick solution.

GWS50

In the real world the rods would rotate so perhaps you might need to model it with universal joints at the ends of the rods.
Alternatively....and this is a cheat and can trip you up when producing the item,,,,,I sometimes model a tiny flat into the bar and set that to be parallel to another fixed face. Not ideal, but gets a quick solution.

martin_kopplow

The question is: How would you want to stop the rods from rotating in the real world?