METHOD FOR REDUCING PNEUMATIC SPRING CONTACT FRICTION, PNEUMATIC SPRING, AND ROLLING STOCK

摘要

PROBLEM TO BE SOLVED: To reduce any contact friction between a rubber parts and a diaphragm constituting a rubber seat on an inner cylinder side. SOLUTION: A ring-like core 11 of an arc-shaped section is internally fitted to a rubber seat 3a on the inner cylinder 3 side constituting a pneumatic spring 1 so that an outer circumferential surface 1a of the ring-like core 11 is protruded outwardly in the outside diameter direction by >=-5 mm from the maximum outer circumferential surface position 3ba of an inner diameter side core 3b of the rubber seat 3a to support the ring-like core 11. The friction of the diaphragm and the rubber seat on the inner cylinder side of the pneumatic spring can be effectively suppressed, the wear-resistant service life is prolonged, and the durable reliability of the pneumatic spring is improved.