Carrying device for conveying tires of trolley

The utility model belongs to the field of tires, and particularly relates to a carrying device for conveying tires of a trolley, which comprises a box body, a lifting unit is arranged in the box body, the lifting unit comprises a fixing rod, a rotating rod, a first screw rod, a second screw rod, a transmission assembly, a screw sleeve, a bearing plate and a limiting assembly, the fixing rod is arranged in the box body, the rotating rod is rotationally connected to the interior of the box body, and the first screw rod is rotationally connected to the inner wall of the box body; by pulling an insertion block, the insertion block moves on the outer wall of a sliding rod to extrude a first spring until the insertion block is separated from the interior of a rotating rod, the rotating rod is rotated, a first screw rod drives a bearing plate fixedly connected with a screw sleeve to move in the box body through a transmission assembly, and therefore a tire in the box body is lifted, and the lifting function is achie