Height-adjusting apparatus for a mobile foundation, and mobile-foundation apparatus

Mobile-foundation apparatus comprising a mobile foundation and a height-adjusting apparatus, comprising:

• wherein the height-adjusting apparatus comprises:
• a rod with a threaded portion,
• a threaded plate, which is retained in an adjustable manner on the threaded portion and has a supporting surface, and
• a tube, which has a cavity, a lateral surface, and a longitudinal axis,
• wherein the tube comprises at least one wall aperture in the lateral surface, wherein the rod projects through the wall aperture into the cavity, such that a longitudinal axis of the rod is not parallel to the longitudinal axis of the tube, and wherein the height-adjusting apparatus is configured such that the rod can be rotated relative to the tube at least in part about an axis parallel to the longitudinal axis of the tube,
• wherein the mobile foundation comprises an upper side with a bearing surface and comprises a bottom, underside, which is located opposite the upper side, and also comprises at least one opening, which runs perpendicularly in relation to the bearing surface and is continuous all the way to the underside, wherein the rod projects into the at least one opening of the mobile foundation by way of an end which is directed away from the tube, and the supporting surface of the threaded plate is arranged on the underside of the mobile foundation.