IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0449431
(2003-05-29)
|
발명자
/ 주소 |
- Itoh, Masaaki
- Hatakeyama, Shingo
- Takashima, Yukio
- Hamanaka, Takeshi
|
출원인 / 주소 |
- Toyo Tire &
- Rubber Co., Ltd.
- Nissan Motor Co., Ltd.
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
12 인용 특허 :
7 |
초록
▼
In an anti-vibration device having a partition member dividing a fluid-sealed chamber into upside and downside, aimed at enhancing the anti-vibration performance by preventing unwanted leak of the fluid through through-holes of the partition member. To that end, the partition member is constructed o
In an anti-vibration device having a partition member dividing a fluid-sealed chamber into upside and downside, aimed at enhancing the anti-vibration performance by preventing unwanted leak of the fluid through through-holes of the partition member. To that end, the partition member is constructed of an elastic membrane partitioning the fluid-sealed chamber, and a pair of grids limiting displacements of the elastic membrane; and the elastic membrane is provided at its either surface with projecting streaks integral therewith, the projecting streaks surrounding through-holes, defined by the grids, over their whole peripheries and abutting on the grids, thereby regulating the flow of fluid among adjacent through-holes.
대표청구항
▼
1. A fluid-sealed anti-vibration device, comprising:a first attachment member; a second attachment member; a vibration insulating base, made of a rubber material, connectingly interposed between the first and second attachment members; a diaphragm, on the second attachment member, opposite to the vi
1. A fluid-sealed anti-vibration device, comprising:a first attachment member; a second attachment member; a vibration insulating base, made of a rubber material, connectingly interposed between the first and second attachment members; a diaphragm, on the second attachment member, opposite to the vibration-insulating base; a fluid-sealed chamber, disposed between the vibration-insulating base and the diaphragm; a partition member, comprising an elastic membrane, having opposite surfaces, for partitioning the fluid sealed chamber into a first chamber at a vibration-insulating base side, and a second chamber at a diaphragm side; an orifice channel in communication with the first chamber and the second chamber; a pair of grids for limiting displacement of the elastic membrane; and a plurality of projections, arranged in a framework structure, between either surface of the elastic membrane and respective surfaces of the grids facing either surface, said projections surrounding through-holes delimited by the grids over an entire periphery of each through-hole, and regulating transfer of fluid among adjacent through-holes. 2. The fluid-sealed anti-vibration device as set forth in claim 1, wherein the projections are provided integrally with one of: either surface of the elastic membrane, and respective surfaces of the grids facing either surface.3. The fluid-sealed anti-vibration device as set forth in claim 1, wherein said grids each substantially consist of a plurality of annular portions extending circumferentially and joint portions extending radially to couple the plurality of annular portions, thereby having two or more through-hole rows each consisting of a plurality of through-holes juxtaposed circumferentially, wherein said joint portions are arranged in different pitches between inner and outer circumferential sides of the grids;said projecting streaks are provided on the elastic membrane and constructed of a plurality of annular projecting pieces extending circumferentially correspondingly to the annular portions of the grids and a plurality of radial projecting pieces extending radially correspondingly to the joint portions of the grids, the radial projecting pieces extending over approximately a whole radial length of the elastic membrane and radially at intervals of an equal angle. 4. The fluid-sealed anti-vibration device as set forth in claim 3, wherein the elastic membrane is provided with a positioning lug whereas one of the grids is provided with a positioning recess complimentary with the positioning lug, into which to receive said lug; both the elastic membrane and the grid are fitted together, whereby the elastic membrane in the revolution direction is positioned.5. A fluid-sealed anti-vibration device comprising:a first attachment member; a second attachment member; a vibration-insulating base, made of a rubber material connectingly interposed between the first and second attachment members; a diaphragm, on the second attachment member opposite the vibration-insulating base; a fluid-sealed chamber, disposed between the vibration-insulating base and the diaphragm; a partition member, comprising an elastic membrane, for partitioning the fluid-sealed chamber into a first chamber at a vibration-insulating base side, and a second chamber at a diaphragm side; a first member disposed at the vibration insulating base side relative to the elastic membrane; and a second member disposed at the diaphragm side relative to the elastic membrane and crimped at its peripheral area to the second attachment member to urge a peripheral portion of the first member to a peripheral portion of the vibration-insulating base at the fluid-sealed chamber side; an orifice channel in communication with the first chamber and the second chamber; such that one of the first member and the second member is provided with a depressed part for housing therein the elastic membrane, and the other member is provided with a flat planar part abutting on an edge surface of an opening of the depressed part so as to close the opening of the depressed part, thus forming a clearance limiting displacement of the elastic membrane between the first member and the second member; the first member being provided at its outer periphery with a vertical wall for shutting off flow through the orifice channel in a circumferential direction; the vertical wall having at an end of the wall an elongated portion inserted in a hole in the second member, thereby enabling the positioning of the first member and the second member in a direction of revolution; and the second member hole being an opening for placing the orifice channel and the second chamber into communication with each other. 6. The fluid-sealed anti-vibration device as set forth in claim 5, wherein the first member and the second member are made of different materials.7. The fluid-sealed anti-vibration device as set forth in claim 5, wherein the first member is formed with the depressed part and is made of resin; and the second member is formed with the flat planar part and is made of metal.8. The fluid-sealed anti-vibration device as set forth in claim 5, wherein the elongated portion of the vertical wall is formed with a hook that engages an opening edge of the hole.9. A fluid-sealed anti-vibration device comprising:a first attachment member; a second attachment member; a vibration-insulating base, made of a rubber material connectingly interposed between the first and second attachment members; a diaphragm, on the second attachment member opposite the vibration-insulating base; a fluid-sealed chamber, disposed between the vibration-insulating base and the diaphragm; a partition member, comprising an elastic membrane, for partitioning the fluid-sealed chamber into a first chamber at a vibration-insulating base side, and a second chamber at a diaphragm side; a first member disposed at the vibration insulating base side relative to the elastic membrane; and a second member disposed at the diaphragm side relative to the elastic membrane and crimped at its peripheral area to the second attachment member to urge a peripheral portion of the first member to a peripheral portion of the vibration-insulating base at the fluid-sealed chamber side; an orifice channel in communication with the first chamber and the second chamber; one of the first member and the second member being provided with a depressed part for housing therein the elastic membrane and the other member being provided with a flat planar part abutting on an edge surface of an opening of the depressed part for closing the opening of the depressed part so that a clearance limiting displacement of the elastic membrane is formed between the first member and the second member; wherein: the first member includes a first grid opposite to one surface of the elastic membrane, limiting displacement of the elastic membrane; the second member includes a second grid opposite to the other surface of the elastic membrane, limiting displacement of the elastic membrane; and a plurality of projections, arranged in a framework structure, are provided between either surface of the elastic membrane and surfaces of the first and second grids opposing respective surfaces of the elastic membrane, such that the projections surround through-holes defined by the grids over an entire periphery of each through-hole, and regulate transfer of fluid among adjacent through-holes. 10. The fluid-sealed anti-vibration device as set forth in claim 1, wherein said projecting streaks constitute a web structure.11. The fluid-sealed anti-vibration device as set forth in claim 1, wherein:the partition member comprises the elastic membrane partitioning the first chamber and the second chamber; a first member is disposed at a vibration-insulating base side relative to the elastic membrane; and a second member is disposed at a diaphragm side relative to the elastic membrane, and is crimped around a periphery thereof to the second attachment member, to urge a peripheral portion of the first member to a peripheral portion of the vibration-insulating base at a fluid-sealed chamber side; such that one of the first member and the second member is provided with a depressed part for housing therein the elastic membrane and the other member is provided with a flat planar part abutting an edge surface of an opening of the depressed part, so as to close the opening of the depressed part, thus forming a clearance-limiting displacement of the elastic membrane between the first member and the second member. 12. The fluid-sealed anti-vibration device as set forth in claim 11, wherein the first member and the second member are made of different materials.13. The fluid-sealed anti-vibration device as set forth in claim 12, wherein the first member is formed with the depressed part and is made of resin; and the second member is formed with the flat planar part and is made of metal.14. The fluid-sealed anti-vibration device as set forth in claim 11, wherein the first member is provided at its outer periphery with a vertical wall for shutting off flow through the orifice channel in a circumferential direction; the vertical wall having at an end thereof an elongated portion inserted in a hole in the second member, for enabling the positioning of the first member and the second member in a direction of revolution.15. The fluid-sealed anti-vibration device as set forth in claim 14, wherein the elongated portion of the vertical wall is formed with a hook that engages an opening edge of the hole.
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