US 4,739,962 AGranted

Vibration isolator

AssigneeHonda Giken Kogyo Kabushiki Kaisha

InventorsIsamu Morita, Katsuyoshi Arai, Tetsuya Koike

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Abstract

A vibration isolator supports a vibrating body vibrating in a wide frequency range while isolating produced vibrations in the entire frequency range. The vibration isolator includes a first attachment member adapted to be connected to the vibrating body, a second attachment member adapted to be connected to the structural body, and an elastically deformable resilient member fixed to and interconnecting the first and second attachment members, the resilient member being elastically deformable in response to relative movement of the first attachment member with respect to the second attachment member. The vibration isolator has a first chamber defined at least partly by the resilient member and having a volume variable dependent on elastic deformation of the resilient member, and a second chamber communicating with the first chamber through a communication structure and having a volume variable dependent on variation of the volume of the first chamber, the first and second chambers being filled with a liquid. The communication structure includes a passage having an internal volume large enough to allow substantial resonance of a flow of the liquid in the passage to be induced by vibrations of the vibrating body based on both the mass of the liquid flowing in the passage and the difference between pressures in the first and second chambers.

Claims16

Dependent claims

A vibration isolator for mounting a vibrating body on a structural body, comprising:

(a) a first attachment member to be connected to the vibrating body;
(b) a second attachment member to be connected to the structural body;
(c) an elastically deformable resilient member fixed to and interconnecting said first and second attachment members, said resilient member being elastically deformable in response to relative movement of said first attachment member with respect to said second attachment member;
(d) first chamber defined at least partly by said resilient member and having a volume variable dependent on elastic deformation of said resilient member;
(e) a second chamber communicating with said first chamber through a communication structure and having a volume variable dependent on variations of the volume of said first chamber, said first and second chambers being filled with a liquid;
(f) said communication structure including a weighted reed valve and a passage means, said passage means having an internal volume which allows substantial resonance of a flow of the liquid in said passage means to be induced by vibrations of the vibrating body based on both the mass of said liquid flowing in said passage means and the difference between pressures in said first and second chambers;
and
(g) said weighted reed valve disposed between said first and second chambers and resonatable in response to a variation in the difference between pressures in said first and second chambers, said resonance of said weighted reed valve not coinciding with the resonance of flow of the liquid in said passage means, wherein said vibrating body is an engine and said internal volume of said passage means is predetermined so as to cause resonance of the fluid when the engine is idling.

5 more elements

A vibration isolator for mounting a vibrating body on a structural body, comprising:

(a) a first attachment member to be connected to the vibrating body;
(b) a second attachment member to be connected to the structural body;
(c) an elastically deformable resilient member fixed to and interconnecting said first and second attachment members, said resilient member being elastically deformable in response to relative movement of said first attachment member with respect to said second attachment member;
(d) first chamber defined at least partly by said resilient member and having a volume variable dependent on elastic deformation of said resilient member;
(e) a second chamber communicating with said first chamber thorough a communication structure and having a volume variable dependent on variations of the volume of said first chamber, said first and second chambers being filled with a liquid;
(f) said communication structure including a valve and a passage means, said passage means having an internal volume which allows substantial resonance of a flow of the liquid in said passage means to be induced by vibrations of the vibrating body based on both the mass of said liquid flowing in said passage means and the difference between pressures in said first and second chambers;
and
(g) said valve actuable in response to the difference between pressures in said first and second chambers for reducing said difference wherein said internal volume of said passage means is predetermined to cause resonance of the fluid when the engine is idling.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 07/040,685Filed 22 Apr 1987 · continuation
Priority: JP 59-3128621 Feb 1984
Granted: 26 Apr 1988
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

F16F 9/34
Details: special valve constructions ; Shape or construction of throttling passages
F16F 13/107
Characterised by features of partitions between two working chambers: passage design between working chambers
F16F 13/22
The damper being a fluid damper, e.g. the plastics spring not forming a part of the wall of the fluid chamber of the damper: characterised by…
F16F
Springs