Fluid-filled vibration damping device

A fluid-filled vibration damping device having a structure in which a main fluid chamber and a sub fluid chamber filled with a fluid are partitioned by a partition member, the fluid-filled vibration damping device comprising:

• a fluid passage that penetrates the partition member and communicates with the main fluid chamber and the sub fluid chamber,
• wherein the fluid passage is provided with a switching valve that protrudes from one wall surface toward an other wall surface of the fluid passage that face each other, and a gap is provided between the switching valve and the other wall surface,
• the switching valve is tiltable at its base end part, and a tip end part of the switching valve contacts the other wall surface of the fluid passage by a tilt displacement of the switching valve in a swing manner in a passage length direction of the fluid passage to close the gap, to configure a switching mechanism, and
• an elastically deformable fin-shaped protrusion that protrudes from the tip end part of the switching valve toward the other wall surface of the fluid passage is provided, and a leak passage is formed between a protruding tip end part of the fin-shaped protrusion and the other wall surface,
• wherein the tip end part of the fin-shaped protrusion has a thick tip end part that is thicker than a base end part of the fin-shaped protrusion in the passage length direction of the fluid passage.

A fluid-filled vibration damping device having a structure in which a main fluid chamber and a sub fluid chamber filled with a fluid are partitioned by a partition member, the fluid-filled vibration damping device comprising:

• a fluid passage that penetrates the partition member and communicates with the main fluid chamber and the sub fluid chamber,
• wherein the fluid passage is provided with a switching valve that protrudes from one wall surface toward an other wall surface of the fluid passage that face each other, and a gap is provided between the switching valve and the other wall surface,
• the switching valve is tiltable at its base end part, and a tip end part of the switching valve contacts the other wall surface of the fluid passage by a tilt displacement of the switching valve in a swing manner in a passage length direction of the fluid passage to close the gap, to configure a switching mechanism, and
• an elastically deformable fin-shaped protrusion that protrudes from the tip end part of the switching valve toward the other wall surface of the fluid passage is provided, and a leak passage is formed between a protruding tip end part of the fin-shaped protrusion and the other wall surface,
• wherein the tip end part of the fin-shaped protrusion is a proximate part in which at least a part in the circumferential direction is separated from the other wall surface of the fluid passage, and the proximate part forms the leak passage.