US 12,486,881 B2
Fluid-filled vibration damping device
Ryota Ishikawa, Aichi (JP); Yoshihiro Kawabata, Aichi (JP); and Yorishige Shimizu, Aichi (JP)
Assigned to Sumitomo Riko Company Limited, Aichi (JP)
Filed by Sumitomo Riko Company Limited, Aichi (JP)
Filed on Dec. 7, 2022, as Appl. No. 18/076,403.
Application 18/076,403 is a continuation of application No. PCT/JP2021/044040, filed on Dec. 1, 2021.
Claims priority of application No. 2020-211611 (JP), filed on Dec. 21, 2020.
Prior Publication US 2023/0106690 A1, Apr. 6, 2023
Int. Cl. F16F 13/10 (2006.01); B60K 5/12 (2006.01)
CPC F16F 13/106 (2013.01) [B60K 5/1283 (2013.01); F16F 13/107 (2013.01); F16F 2228/066 (2013.01)] 9 Claims
OG exemplary drawing
 
1. 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 fluid-filled vibration damping device further comprises a rubber film sandwiched by the partition member,
wherein the switching valve protrudes from a sandwiched part of the rubber film toward the other wall surface of the fluid passage and extends in a circumferential direction,
wherein the switching valve is provided to protrude from the sandwiched part of the rubber film to an outer peripheral side over an entire periphery, and the fin-shaped protrusion is provided to protrude on an outer peripheral surface of the switching valve over the entire periphery.