Unity and Blender Animations

I have a character with a set of animations. He is made out of boxes, and thusly I didn't add any bones, just animated the boxes. I have all of the animations running (example, walking at 1-20, jumping at 21-30 etc) how would I take all of these animations and tell Unity that walk is 1-20, jump is 21-30 etc? I have been searching and I cannot seem to understand.