English to Italian Tech/Engineering Mechanics / Mech Engineering

Good morning guys :) i'm translating a patent about crates and more specifically re-usable crates for the transport of motor vehicles. The translations that i've found all translate it as "cassa" o "gabbia" da imballaggio o di spedizione. I don't agree with those because it is not a proper "cassa" or "gabbia", is more like a "carcassa" for me. Which wold be the best term?
Thank you in advance for the help, i leave the patent number in order for you to see the drawings and understand what i'm meaning :)
Patent Number: EP 3010837
Go to this site https://register.epo.org/advancedSearch?Ing=en and insert the number in the part of the "Publication number" and then click the B1 patent specification above the orange number.