WO1989012764A1 - Pneumatic anti-vibration mounting - Google Patents
Pneumatic anti-vibration mounting Download PDFInfo
- Publication number
- WO1989012764A1 WO1989012764A1 PCT/GB1989/000658 GB8900658W WO8912764A1 WO 1989012764 A1 WO1989012764 A1 WO 1989012764A1 GB 8900658 W GB8900658 W GB 8900658W WO 8912764 A1 WO8912764 A1 WO 8912764A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vibration mounting
- mounting
- base
- pneumatic anti
- top cover
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
- F16F9/0418—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall having a particular shape, e.g. annular, spherical, tube-like
- F16F9/0427—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall having a particular shape, e.g. annular, spherical, tube-like toroidal
Definitions
- This Invention relates to a Pneumatic Anti-Vibration Mounting.
- Pneumatic Anti-vibration Mountings are not new, normally being in the form of convoluted bellows, a toroidal ring contained within a metal case, what is known as a rolling diaphram or a diaphrame fitted into a rigid or semi rigid base.
- Versions of the presently available Air Mounts tend to either have low natural frequency combined with low damping and lack of stability or on the other hand having a higher natural frequency but providing greater damping and stability while also being captive.
- the presently described Invention combines the most desirable features of the above described mounting offering a very low nateral frequency combined with captivity and a variable degree of damping.
- a pneumatic anti-vibration mounting comprising a flexible inflatable hallow chamber, having a hole through its centre into which is located as a sliding fit, a central threaded bush.
- the bush top is attached to the underside of a top cover, onto which the mounted equipment is secured.
- a circular distance piece Positioned around the central bush immediatly below the centre of the top cover and in contact with the top of the air chamber is positioned a circular distance piece.
- Attached to the bottom of the air chamber is a base which has a vertical hole at its top centre, this being of suitable diameter to allow the air chamber not being attached to the threaded bush when deflected by the supported load, to act in the manner of a rolling diaphram.
- An air chamber inflation valve can be positioned so as to connect directly into the air chamber or fitted into the base and connected to the air chamber by a pipe.
- a captive version of the mounting can be provided by extending the threaded bush down into a taller base with a hollow centre, a suitable base plate being attached to the base, and with the addition of a bump stop secured to the bottom of the central threaded bush.
- Fig 1 illustrates a plan view of a typical mounting.
- Fig 2 illustrates a cut away section allong axis A-A1.
- a free standing version of the anti-vibration mounting comprises an inflatable flexible air chamber 1 contained within a protective top cover 2.
- a central threaded bush 3 is a sliding fit into the centre of air chamber 1 and is attached to the underside of protective top cover 2.
- Located around the central bush 3 and positioned between the air chamber 1 and the top cover 2 is a circular distance piece 4.
- Attached to the bottom of the air chamber 1 is a base 5 having a air chamber protective sealing lip 6 which bears as a sliding fit on top cover 2.
- An inflation valve 7 can be fitted directly into the air chamber through slot 8 or alternatively an inflation valve 9 can be fitted into the base and connected to the air chamber by a pipe 10.
- the base of the free standing version of the mounting does not include items shown Fig 1 and Fig 2 below line B-B1 on Fig 2.
- a captive bolt down version of the mounting comprises all the features described above but with an extended base below line B-B1 Fig 2.
- An extended central bush 3 protruding through a hole in the top of base plate 11 a bump stop 12 when secured to the bottom of central bush 3 prevents the mounted equipment 13 secured by bolt 14, from being completely detached from the item to which base plate 11 is bolted.
- the flexible air chamber 3 could be filled or partly filled with liquid, gas, cellurlar or any suitable resilient material being either inflatable, vented or sealed.
- the protective cover 1 is not essential to the satisfactory operation of the mounting normally only being in contact with the bottom of the cover or only the distance piece 4. If desireable the outer periphery of the air chamber 1 can be designed to contact the inside of the downstanding walls of the protective cover 2 while increasing natural frequency slightly, improving damping and mounted equipment stability. For many application a flat plate could be sudstituted for the protective cover 2.
- the air chamber In operation with correct loading the air chamber will be compressed causing the outer walls to flex and the area adjacent to the central bush at the bottom to act in the manner of a rolling diaphram the final operating position of the bump stop 12 being approx mid way between its fully up and fully down positions and the mounted equipment B being effectively isolate from the base 5. Should the air chamber 1 fail or be overload, the bump stop which is coated with a flexible material 15 rests on the supporting member 16. Extreme excursions of the mounted equipment laterally are contained by contact between bump stop 12 and base plate 11 also by contact between protective cover 2 and base 5.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8813985A GB2223080B (en) | 1988-06-13 | 1988-06-13 | Pneumatic anti-vibration mounting |
GB8813985 | 1988-06-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1989012764A1 true WO1989012764A1 (en) | 1989-12-28 |
Family
ID=10638569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/GB1989/000658 WO1989012764A1 (en) | 1988-06-13 | 1989-06-13 | Pneumatic anti-vibration mounting |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0420903A1 (en) |
AU (1) | AU3776089A (en) |
GB (1) | GB2223080B (en) |
WO (1) | WO1989012764A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4228513A1 (en) * | 1992-08-27 | 1994-03-03 | Phoenix Ag | Air spring for supporting vibrating body - has pressurised gas supply pipe connected in at side central area of bellows. |
EP1304497A2 (en) * | 2001-10-18 | 2003-04-23 | Burkhard Oest | Gas spring |
US10316727B2 (en) * | 2016-12-02 | 2019-06-11 | Ford Global Technologies Llc | Isolator in a vehicle exhaust system and an exhaust system including the same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107060130B (en) * | 2017-06-15 | 2022-04-22 | 金陵科技学院 | Gas shock insulation support |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1388967A (en) * | 1919-06-03 | 1921-08-30 | N C L Engineering Corp | Vibration-quenching mount for internal-combustion motors |
US1403466A (en) * | 1920-10-02 | 1922-01-10 | Thos J Corcoran Lamp Co | Air spring |
US2790634A (en) * | 1955-06-23 | 1957-04-30 | Thomas L Fawick | Pneumatic cushioning assembly for vehicles and the like |
US3008703A (en) * | 1959-07-03 | 1961-11-14 | Gen Tire & Rubber Co | Vibration isolating air spring |
DE2309276A1 (en) * | 1973-02-24 | 1974-08-29 | Volkswagenwerk Ag | GAS SPRING ARRANGEMENT |
EP0049741A1 (en) * | 1980-10-10 | 1982-04-21 | Boge GmbH | Elastic axial support |
GB2088996A (en) * | 1980-10-10 | 1982-06-16 | Pumphrey Gordon Lloyd | Inflatable Anti vibration Mounting |
EP0055824A1 (en) * | 1981-01-07 | 1982-07-14 | Nissan Motor Co., Ltd. | An engine mount |
GB2124731A (en) * | 1982-06-22 | 1984-02-22 | Gordon Lloyd Pumphrey | Inflatable anti-vibration mounting |
GB2149475A (en) * | 1983-10-19 | 1985-06-12 | Air Mounts Limited | Inflatable anti-vibration mounting |
GB2201222A (en) * | 1986-12-04 | 1988-08-24 | Ivt Ltd | Anti-vibration mounting |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1054896A (en) * | 1964-04-24 | 1967-01-11 | ||
DE2750667C2 (en) * | 1977-11-12 | 1980-01-24 | Daimler-Benz Ag, 7000 Stuttgart | Air springs for automobiles |
DE3606325A1 (en) * | 1986-02-27 | 1987-09-03 | Talbot Waggonfab | UNDERCARRIAGE SUSPENSION FOR RAIL VEHICLES |
-
1988
- 1988-06-13 GB GB8813985A patent/GB2223080B/en not_active Expired - Fee Related
-
1989
- 1989-06-13 AU AU37760/89A patent/AU3776089A/en not_active Abandoned
- 1989-06-13 WO PCT/GB1989/000658 patent/WO1989012764A1/en not_active Application Discontinuation
- 1989-06-13 EP EP19890907219 patent/EP0420903A1/en not_active Ceased
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1388967A (en) * | 1919-06-03 | 1921-08-30 | N C L Engineering Corp | Vibration-quenching mount for internal-combustion motors |
US1403466A (en) * | 1920-10-02 | 1922-01-10 | Thos J Corcoran Lamp Co | Air spring |
US2790634A (en) * | 1955-06-23 | 1957-04-30 | Thomas L Fawick | Pneumatic cushioning assembly for vehicles and the like |
US3008703A (en) * | 1959-07-03 | 1961-11-14 | Gen Tire & Rubber Co | Vibration isolating air spring |
DE2309276A1 (en) * | 1973-02-24 | 1974-08-29 | Volkswagenwerk Ag | GAS SPRING ARRANGEMENT |
EP0049741A1 (en) * | 1980-10-10 | 1982-04-21 | Boge GmbH | Elastic axial support |
GB2088996A (en) * | 1980-10-10 | 1982-06-16 | Pumphrey Gordon Lloyd | Inflatable Anti vibration Mounting |
EP0055824A1 (en) * | 1981-01-07 | 1982-07-14 | Nissan Motor Co., Ltd. | An engine mount |
GB2124731A (en) * | 1982-06-22 | 1984-02-22 | Gordon Lloyd Pumphrey | Inflatable anti-vibration mounting |
GB2149475A (en) * | 1983-10-19 | 1985-06-12 | Air Mounts Limited | Inflatable anti-vibration mounting |
GB2201222A (en) * | 1986-12-04 | 1988-08-24 | Ivt Ltd | Anti-vibration mounting |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4228513A1 (en) * | 1992-08-27 | 1994-03-03 | Phoenix Ag | Air spring for supporting vibrating body - has pressurised gas supply pipe connected in at side central area of bellows. |
EP1304497A2 (en) * | 2001-10-18 | 2003-04-23 | Burkhard Oest | Gas spring |
DE10151497A1 (en) * | 2001-10-18 | 2003-06-18 | Burkhard Oest | Gas spring |
EP1304497A3 (en) * | 2001-10-18 | 2004-07-28 | Burkhard Oest | Gas spring |
DE10151497B4 (en) * | 2001-10-18 | 2005-08-04 | Burkhard Oest | Gas spring |
US10316727B2 (en) * | 2016-12-02 | 2019-06-11 | Ford Global Technologies Llc | Isolator in a vehicle exhaust system and an exhaust system including the same |
Also Published As
Publication number | Publication date |
---|---|
GB8813985D0 (en) | 1988-07-20 |
AU3776089A (en) | 1990-01-12 |
GB2223080A (en) | 1990-03-28 |
GB2223080B (en) | 1992-07-08 |
EP0420903A1 (en) | 1991-04-10 |
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