Does anybody have a image of how the ragdoll of a normal human model has to be named and the bones needed so that I can make a ragdoll in unity3d?
It would really be apreciated. 
Hi,
there is really no need to name the bones in any particular manner. It’s their location that makes the difference. What you basically do is take your rigged model and explore its transforms to see where they are located, if you are creating your ragdolls manually.
If you intend to save time and mental sanity however you can check URG! our ragdoll generator tool.
http://forum.unity3d.com/threads/107501-Release-URG!-The-ultimate-ragdoll-generator?highlight=ragdoll