Patent ID: 7891644

Claim:
An air spring comprising: a chamber component linked to one of a support body and a movable body; a piston component linked to the other of the support body and the movable body; a diaphragm formed in a substantially cylindrical shape and set in a state in which the inside and outside thereof at a middle portion are reversed, one end portion and another end portion are linked, respectively, to the chamber component or the piston component, and a chamber is formed at the interior of the diaphragm; a dustcover that is arranged at an outer peripheral side of the diaphragm and that is provided with a linking tube fixed to an outer peripheral side of the chamber component at an upper end thereof, the dustcover being integrally provided with a shoulder portion that extends from a lower end portion of the linking tube to an outer peripheral side and a tubular bellows portion that extends downward from a lower end portion of the shoulder portion and is extendable and retractable along a direction of movement of the movable body; and a deformation-preventing component that is arranged at an outer peripheral side of the shoulder portion and that comes into contact with the shoulder portion when the bellows portion is compression deformed, and restricts elastic deformation of the shoulder portion towards the linking tube side, wherein the deformation-preventing component is provided with a linking portion fixed to the chamber component at an upper end portion of the deformation-preventing component, and is provided with a stopper that extends from a lower end portion of the linking portion towards the outer peripheral side of the shoulder portion and faces the shoulder portion.