PURPOSE: To obtain a wheel which is superior in absorptivity of an external force and improved surface follow-up property of a tire and driving comfortability by constantly pressure-energizing a movable member partitioning a pressure chamber communicating through to an air cell of the tire formed in the wheel in two chambers toward a first chamber, and by setting pressure of a second chamber lower than that of the first chamber.
CONSTITUTION: A pressure case 22 put over the outside surface of a disc part 10 is divided into two of a base 23 and a base cap 24, and a pressure chamber 25 is formed between the base 23 and the base cap 24. The inside of the pressure chamber 25 is airtightly partitioned into two chambers of a first chamber 28 and a second chamber 29 by a diaphragm 27. The first chamber 28 is communicated through to a pressure chamber 17 of a tire 9 through a communicating passage 30 formed at the disc part 10 of a wheel 8, and the diaphragm 27 is pressurized toward the first chamber 28 by a compression coil spring 32. When an external force is added to a tread 9a of the tire 9, air pressure of the first chamber 28 rises and capacity increases, and it is possible to apparently get the same state that the spring constant of the tire 9 falls.
MAEDA MASASHI
NISHIDA KAZUHIRO
