AIR SUSPENSION DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an air suspension device capable of further improving ride quality of a vehicle.SOLUTION: An air suspension device 100 comprises air springs 1 installed between a vehicle body 4 and wheels 2. The air spring 1 has: an upper support member 11; a piston member 13 which moves relative to the upper support member 11; and a rubber diaphragm 15 which connects the upper support member 11 with the piston member 13 and forms an air chamber 16 together with the upper support member 11 and the piston member 13. A section where the rubber diaphragm 15 contacts the piston member 13 has a surface 15b coated with a low friction agent layer 19.SELECTED DRAWING: Figure 3