Fluid-filled tubular vibration-damping device

A fluid-filled tubular vibration-damping device comprising:

• an inner shaft member;
• an intermediate tube member spaced radially outward from the inner shaft member;
• a main rubber elastic body connecting the inner shaft member and the intermediate tube member;
• an outer tube member fastened externally onto the intermediate tube member;
• a pair of fluid chambers formed between the inner shaft member and the outer tube member, the fluid chambers being formed on opposite sides of the inner shaft member;
• and
• an orifice passage through which the fluid chambers are held in communication, wherein:
• in at least one of the fluid chambers, at least one side wall of side walls positioned on axially opposite sides includes:
• a thick central connector positioned in a circumferentially central portion of the at least one side wall and extending in an axis-perpendicular direction, and
• thin flexible walls that are thinner than the central connector while being positioned and spreading on circumferentially opposite sides of the at least one side wall, and
• in both of the fluid chambers formed on the opposite sides of the inner shaft member, each of the side walls positioned on the axially opposite sides includes the central connector and the flexible walls.

A fluid-filled tubular vibration-damping device comprising:

• an inner shaft member;
• an intermediate tube member spaced radially outward from the inner shaft member;
• a main rubber elastic body connecting the inner shaft member and the intermediate tube member;
• an outer tube member fastened externally onto the intermediate tube member;
• a pair of fluid chambers formed between the inner shaft member and the outer tube member, the fluid chambers being formed on opposite sides of the inner shaft member;
• and
• an orifice passage through which the fluid chambers are held in communication, wherein:
• in at least one of the fluid chambers, at least one side wall of side walls positioned on axially opposite sides includes:
• a thick central connector positioned in a circumferentially central portion of the at least one side wall and extending in an axis-perpendicular direction, and
• thin flexible walls that are thinner than the central connector while being positioned and spreading on circumferentially opposite sides of the at least one side wall,
• the intermediate tube member includes a pair of windows opening at portions that are opposed to each other in the axis-perpendicular direction in an axially middle portion of the intermediate tube member,
• the main rubber elastic body includes a pair of pockets opening to an outer circumferential surface of the intermediate tube member through the respective windows thereof, and
• the windows of the intermediate tube member are covered by the outer tube member so that the fluid chambers are provided by the pockets.