Vehicle wheel with an especially single-piece rim and tubeless tire suitable foremergency use, and method for mounting a tire on a rim having an emergency supp ort surface

摘要

The tire sidewalls have bead areas (6) which are held in annular chambers (10), the axially outer walls (23) of which have an opening (24) to enable the sidewalls (9) to pass through. Each bead is held in a cylindrical axially inner area of each chamber and the sidewall in an axially outer area whose breadth increases to the outside of the rim. A filling ring (12) with a radially inner surface corresponding to the radially inner chamber wall (20) is pressed against the latter when the tire is mounted. Preferred Features: The filling rings (12) move axially to hold and/or allow removal of the tire beads from the rim (1) and when correctly positioned extend axially out through the openings (24) in the axially outer chamber walls (23). Filling ring construction comprises rubberized cords spirally wound around the ring axis. The radially inner and outer faces of a filling ring are parallel and when the ring is correctly located forms a positive connection with the radially inner side of the bead (6). The outer side of the bead lies against the radially outer wall of the annular chamber (10). In a design variation the axially outer area of the chamber may extend into a third axial area. Both areas may be curved and the radially inner wall has a nose which radially narrows the chamber. The ratio of the maximum radius of the radially inner chamber wall (20) in the broadening axially outer area to the radius of the inner chamber wall in the cylindrical axially inner area is 1.005-1.4. The radially outer surfaces of the rim act as an emergency running face. Tire beads may be coreless or have a rubber core (8) with a hardness of 80-100, preferably 85-90 Shore A. The bead core may have an extension of 5-30%, preferably 10-20% and a compressibility of 1-5%, preferably 2.5-3.5%. The maximum diameter of the emergency running surfaces is 1.05-1.3 times, preferably 1.1-1.2 times greater than the inner ring diameter of the bead core when the wheel is assembled.