Lifting supporting wheel assembly and cantilever sliding door

The invention relates to a lifting supporting wheel assembly and a cantilever sliding door, and belongs to the technical field of sliding doors. The lifting supporting wheel assembly is characterized by comprising a case, a slider-crank mechanism, a drive mechanism and a lifting wheel; the case is a hollow cavity with an opening in the bottom face, and a guide rod is transversely arranged in the case; the slider-crank mechanism comprises a slider, a crank and a connecting rod connecting the slider and the crank through two rotating pairs; the slider is arranged on the guide rod in a sliding and sleeving manner, the upper portion of the crank is rotationally connected to the case, and the lower portion of the crank is hinged to the lifting wheel; and the drive mechanism is used for driving the slider to slide. Compared with the prior art, the lifting supporting wheel assembly and the cantilever sliding door have the following beneficial effects that the slider-crank mechanism can be driven by the drive mechanism to run, and meanwhile the lifting wheel is driven to ascend and descend. When the lifting wheel abuts against the ground, a cantilever door body can be prevented from hanging down and deforming. Meanwhile, the lifting wheel can be folded upwards and hung above the ground, the suspension vision effect of the cantilever door body cannot be affected, or stable running of the door body cannot be hindered.