This is a Space Lorry, which is just like a regular lorry, only in space! This one, complete with a magnificent back story, comes from the unique mind of David Roberts, and it’s used for transporting artificially-grown* mini-figure hands across the planet of Bysedd VII to supply the intergalactic greeble trade. See more at the link above.
*Coincidentally there are a lot of one-handed mini-figures on Bysedd VII. We have been told this is an unrelated phenomenon.