Vibration-proof device
AssigneeToyo Tire & Rubber Co., Ltd.
InventorsNaoki Yamaguchi, Yoshitaka Ishimoto
Life of this patent
Estimating the term…
Abstract
Vibration-isolating device having a low dynamic spring constant, particularly in a high frequency spectrum of about 150 Hz to 300 Hz, and including an annular liquid chamber defined in a rubber elastomer between an internal cylinder member and an external cylinder member. An annular stirring member is arranged in the chamber projecting from an inner periphery side of the external cylinder member inward toward a chamber wall face on the internal cylinder member side form a clearance therebetween. Upon inputting of vibrations, the dynamic spring constant is lowered by the resonance action due to the fluidization of liquid flowing vertically through the clearance within the chamber.
Claims10
A vibration-proof device comprising:
- an internal cylinder member,
- an external cylinder member concentrically arranged outwardly of the internal cylinder member,
- a rubber elastomer interposed between the internal and external cylinder members, the rubber elastomer including an annular liquid chamber surrounding the internal cylinder member, the rubber elastomer including a main rubber portion bonded by vulcanization to an outer periphery of the internal cylinder member and a diaphragm bonded by vulcanization to an inner periphery of the external cylinder member, the liquid chamber being formed between the main rubber portion and the diaphragm,
- an annular stirring member arranged at least partially inside the liquid chamber and projecting inwardly from an inner periphery side of the external cylinder member toward a chamber wall face on the internal cylinder member side to form a clearance between the inner periphery side of the external cylinder member and the chamber wall face,
- a main outer cylinder bonded by vulcanization to an outer periphery of the main rubber portion of the rubber elastomer and arranged hermetically inside the external cylinder member, and
- an inside-of-diaphragm cylinder bonded by vulcanization to an inner periphery of the diaphragm and arranged hermetically in the outer periphery of the internal cylinder member.
A vibration-proof device comprising:
- an internal cylinder member;
- an external cylinder member concentrically arranged outwardly of the internal cylinder member;
- a rubber elastomer interposed between the internal and external cylinder members, the rubber elastomer including an annular liquid chamber surrounding the internal cylinder member, the rubber elastomer comprising a main rubber portion bonded by vulcanization to an outer periphery of the internal cylinder member and a diaphragm, the liquid chamber being formed between the main rubber portion and the diaphragm;
- an annular stirring member arranged at least partially inside the liquid chamber and projecting inwardly from an inner periphery side of the external cylinder member toward a chamber wall face on the internal cylinder member side to form a clearance between the inner periphery side of the external cylinder member and the chamber wall face;
- the external cylinder member including an outside-of-diaphragm cylinder including a cylinder portion to which the diaphragm is bonded by vulcanization and which is adapted to be connected to a vehicle body panel, and a main outer cylinder bonded by vulcanization to an outer periphery of the main rubber portion;
- the main outer cylinder being arranged hermetically at one end inside the cylinder portion of the outside-of-diaphragm cylinder, and
- an inside-of-diaphragm cylinder bonded by vulcanization to an inner periphery of the diaphragm and connected hermetically to the outer periphery of the internal cylinder member.
A vibration-proof device comprising:
- an internal cylinder member,
- an external cylinder member concentrically arranged outwardly of the internal cylinder member,
- a rubber elastomer interposed between the internal and external cylinder members, the rubber elastomer including an annular liquid chamber surrounding the internal cylinder member,
- an annular stirring member arranged at least partially inside the liquid chamber and projecting inwardly from an inner periphery side of the external cylinder member toward a chamber wall face on the internal cylinder member side to form a clearance between the inner periphery side of the external cylinder member and the chamber wall face,
- the stirring member comprising a ring-form plate made of a rigid body and a rubber portion encrusting an inward margin of the ring-form plate.
Dependencies are inferred from the claim text.