A handcart for transporting cargo on the lunar surface

One day, astronauts will move around the lunar surface several kilometers from the base. In doing so, they will have to carry some kind of load with them, and they may even get injured. For this reason, they would always have to go in pairs so that one could help the other. In order to be able to carry some kind of load and carry an injured person, they would need to have some kind of cart. This cart must be light, resistant to the very dangerous lunar dust, and able to go over rocks.
The simplest way to make such a cart is to make it in the form of a large wheel with a diameter of 1.8 to 2 meters and a width of about 0.8 meters, in which the load and a bed for a man can be placed.
Such a cart is shown in the picture above.
The wheel (1) is wide and tall enough to accommodate a man. The wheel (1) is driven by a handle (2) that is pulled by a man on one side, and on the other side it is connected to the axle of the cart (7). This trolley axle (7) passes through the wheel (1) on the side, whereby the wheel rotates around the trolley axle (7). A hanging basket (3) is attached to the inner side of the wheel axle (7) on which a bearing (4) is located. Below this bearing (4) there is a space for cargo (6).
When moving, a person pulls the wheel (1) over the handle (2), which, due to its large diameter, moves very easily over uneven surfaces. In doing so, the wheel rotates around the trolley axle (7), on which the hanging basket (3) is located. The basket is also located on the trolley axle (7), and since it is mostly located below the level of the trolley axle (7), the basket is constantly hanging towards the ground, both when the trolley is moving and when it is stationary.
At the top of the hanging basket (3) there is a bearing (4) on which an injured astronaut can be placed. The wheel (1) is entered from the side of the wheel through a door (5). This door (5) can be tightly closed and sealed, and then air can be let into the wheel (1) so that the person inside can breathe.
In order for the wheel (1) to move more easily over rocks, it must be made of an elastic material, and in order to retain heat inside it must have thermal insulator properties. It must retain these properties even with very sudden changes in temperature from very low -200 degrees to high up to 80 degrees.
The wheel (1) can be used to place cargo in it during transport to the moon in order to save space.