Sumitomo Riko Company Limited

Tokai Rubber Industries, Ltd.

Toyota Jidosha Kabushiki Kaisha

Ryota Ishikawa

Noriaki Yoshii

Yuichi Ogawa

Takayoshi Yasuda

Masaki Yoshida

Yorishige Shimizu

Kazuki Hotta

Syuya Sonobe

Yoshihiro Kawabata

A fluid-filled vibration damping device includes a switching valve arranged inside the fluid passage passing through a partition member to communicate with a main fluid chamber and a sub fluid chamber and protruding from one wall surface toward the other wall surface of the fluid passage that face each other. A gap is provided between the switching valve and the other wall surface. A tip end part of the switching valve abuts against the other wall surface through a tilt displacement in a swing manner of the switching valve in the passage length direction of the fluid passage to thereby form a switching mechanism for closing the gap. An elastically deformable fin-shaped protrusion protruding from the tip end part of the switching valve toward the other wall surface is provided. A leak passage is formed between a protruding tip end of the fin-shaped protrusion and the other wall surface.

Fluid-filled vibration damping device

A fluid-filled vibration damping device including: primary and auxiliary liquid chambers; a partition provided between the two chambers; and a movable plate supported movably in a plate thickness direction thereof by the partition. The movable plate receives liquid pressure of the two chambers on its opposite faces so as to constitute a liquid pressure absorber. The partition includes at least one communication hole opening onto its surface facing the movable plate. The movable plate includes at least one elastic protrusion projecting toward the communication hole. The elastic protrusion includes a peripheral wall to be pressed in compression and shear directions and be elastically deformed to a radially inner side of the communication hole as well by coming into contact with a wall portion of the communication hole due to movement of the movable plate in the plate thickness direction.

A fluid-filled vibration-damping device including: a pressure-receiving chamber with a non-compressible fluid filled therein; an equilibrium chamber with the non-compressible fluid filled therein; an orifice passage connecting the pressure-receiving chamber and the equilibrium chamber with each other; a relief configured to open a short-circuit passage by an action of a negative pressure occurring in the pressure-receiving chamber upon input of an impact load so as to connect the pressure-receiving chamber with the equilibrium chamber so that cavitation is suppressed; and at least one leak passage provided at a part of the short-circuit passage in the relief, the at least one leak passage keeping a communication state between the pressure-receiving chamber and the equilibrium chamber with a smaller passage cross section than that of the orifice passage, even when the short-circuit passage is not opened.

Fluid-filled vibration-damping device

A fluid-filled vibration-damping device including: two elastically-connected attachment members; two liquid chambers divided by a partitioner having a storing space; an elastic mover disposed in the storing space and having a support supported by the partitioner; a positioner provided on at least one of radial inside and outside of the support, partially in a peripheral direction of the support, in abutment against a peripheral wall face of the storing space; a valve separate from the positioner in the peripheral direction, and the peripheral wall face in opposition; an axially-thin part connecting the positioner and the valve to the support in a displaceable manner; a communication passage connecting the liquid chambers formed between the peripheral wall face and the valve; and a switch configured to obstruct the communication passage by abutment of the valve against the peripheral wall face.

A vibration-damping device wherein a concave groove is provided on an opposing face of at least one of first and second stopper portions to another. An inner protrusion is formed on a rubber buffer layer overlapped with the opposing face so as to be inserted into the concave groove, and both sides of the inner protrusion in a lengthwise direction of the concave groove are free end faces. An outer protrusion is formed at a formation part of the inner protrusion on the rubber buffer layer so as to protrude outward from the concave groove A displacement regulating portion with a lower surface height than that of a distal end face of the outer protrusion is provided on the rubber buffer layer covering an area of the opposing face located away from the concave groove to both sides in a widthwise direction.

Vibration-damping device

A vibration damping device including: an inner member; an outer cylindrical member into which an end portion of the inner member is inserted; a main rubber elastic body elastically connecting the end portion of the inner member and the outer cylindrical member in an axis-perpendicular direction; a support piece integrally provided with one axial end portion of the outer cylindrical member so as to protrude peripherally inward therefrom and be opposed to one axial end face of the inner member; and a connecting rubber provided between opposed faces of the end face of the inner member and the support piece of the outer cylindrical member so as to elastically connect them in an axial direction.

Vibration damping device

A fluid-filled type vibration damping device including an elastic movable member attached to a partition member. The elastic movable member includes a clasped portion clasped by the partition member and a switching portion provided to an outer peripheral side of the clasped portion and positioned within a second orifice passage. An abutting portion is provided to the switching portion and projects to lengthwise opposite sides of the orifice passage. A switching mechanism is constituted for opening the orifice passage through a gap formed between the switching portion and the inside face of the orifice passage while closing the orifice passage by abutment of the abutting portion against the inside face of the orifice passage by means of a tilting motion of the switching portion relative to the clasped portion through elastic deformation of a thin portion provided between the clasped portion and the switching portion.

Fluid-filled type vibration damping device

A fluid-filled type vibration damping device including a partition member having a moveable film and a short passage interconnecting a pressure receiving chamber and an equilibrium chamber. A valve member that switches between a communicating state and a shut off state of the short passage projects from the moveable film. The valve member has a thick walled part and a thin walled part, the thin walled part being pressed on an inner wall surface of the short passage. A pressure of the pressure receiving chamber is applied through the short passage to a pressure receiving chamber side surface of the thick walled part, while an equilibrium chamber side surface thereof is supported by the partition member. The pressure of the pressure receiving chamber is applied to one side of the thin walled part and a pressure of the equilibrium chamber is applied to another side thereof through the short passage.

Growing community of inventors

Komaki, Japan

Ryota Ishikawa