AU2003204401A1 - Hydraulic spring as primary spring for railbound vehicles - Google Patents
Hydraulic spring as primary spring for railbound vehicles Download PDFInfo
- Publication number
- AU2003204401A1 AU2003204401A1 AU2003204401A AU2003204401A AU2003204401A1 AU 2003204401 A1 AU2003204401 A1 AU 2003204401A1 AU 2003204401 A AU2003204401 A AU 2003204401A AU 2003204401 A AU2003204401 A AU 2003204401A AU 2003204401 A1 AU2003204401 A1 AU 2003204401A1
- Authority
- AU
- Australia
- Prior art keywords
- spring
- hydraulic
- hollow space
- gas
- hydraulic spring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper 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
- F16F13/20—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper 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 comprising also a pneumatic spring
-
- 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
- F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
- F16F13/04—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper
- F16F13/06—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper 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
- F16F13/08—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising both a plastics spring and a damper, e.g. a friction damper 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 the plastics spring forming at least a part of the wall of the fluid chamber of the damper
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Combined Devices Of Dampers And Springs (AREA)
- Fluid-Damping Devices (AREA)
- Vehicle Body Suspensions (AREA)
- Springs (AREA)
Abstract
The hydraulic spring (2) incorporates a gas-filled cavity (18) with a conical shape and a volume which is variable by compression. An Independent claim is also included for an application of the proposed hydraulic spring as a primary spring for rail vehicles.
Description
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION STANDARD PATENT Applicant(s): ContiTech Luftfedersysteme GmbH Invention Title: HYDRAULIC SPRING AS PRIMARY SPRING FOR RAILBOUND
VEHICLES
The following statement is a full description of this invention, including the best method of performing it known to me/us: IP Australia Documents were received on: 28 MAY 2003 Batch No: HYDRAULIC SPRING AS PRIMARY SPRING FOR RAILBOUND VEHICLES Field of the Invention The present invention relates to a hydraulic spring.
Background Art Hydraulic springs known in the art usually comprise a rubber part (or a part made from an elastomer material) serving as a spring element, that on its circumference is placed on a pot-shaped structure (for fastening in the axial direction) and axially on a bolt (for fastening as a structure) To enable to carry out the damping function the pot-shaped structure is partially filled with a viscous fluid, in which a damping plate transversely mounted on a lower extension of the fastening bolt can move. Between the viscous fluid and the rubber part a hollow space, filled with gas, is situated.
Such a support is known from EP 0 669 484 Al (see, for example, Figs.l, 7, 11, 15 and 16). In that case the support is supposed to support the cabin of an industrial vehicle (Fig.18). The purpose of the hollow space 17A, situated between the elastic part and the viscous fluid, is to impede the flowing of the viscous fluid (column 5/11-13). The hollow space 17A is otherwise not discussed in detail, since as far as the invention is concerned it is not important for EP 0 669 484 Al, as it was state-of-the-art (see Fig.17) already then (1995), where such a hollow space (air space) is also provided.
The edge of the rubber part shown in Figs.l, 7, 11, 15 and 16 serves as a stop for the damping plate; similarly to the elastic stops 108A fitted to the damping plate in Fig.17, which serve as stops.
S:49294 It can be assumed from the flow conditions of the known constructions that for an optimum functioning a pendulum movement about an imaginary zero line is necessary.
However, a pendulum movement about a predetermined zero position when superstructures with greatly varying load conditions need to be supported and oscillation excitations need to be cushioned and damped, is not present in the case of a primary spring. Consequently the known constructions do not seem to be suitable to be used as primary springs.
To enable to accomplish a primary spring with hydraulic damping, the widely differing load differences occurring in the case of primary springs, need to be taken into consideration. In the case of the supports know so far, operating with highly viscous fluids, this is not the case, since the differences between tare load and full load are small. When such a support becomes smaller, the softness of the rubber body will suffice to equalise the diminishing space in the pot in the case of an unfilled support. The rubber body buckles and by virtue of this makes the necessary space available for the incompressible fluid.
In the case of the spring according to this invention this is not possible. Since the space below the spring element markedly changes, the buckling of the rubber body is inadequate. Therefore an additional space has to be provided.
It would be an advantage if the present invention would provide a "hydraulic spring" that can be manufactured costeffectively and operates reliably to support and elastically balance the superstructures of railbound vehicles and "copes" with the most diverse load conditions.
S:49294 Summary of the Invention The present invention provides a hydraulic spring with a pot-shaped housing that at the top is closed pressure-tight by a spring element made from rubber-elastic material and is partially filled with a gas and otherwise with a hydraulic fluid, wherein the spring element has an axially arranged pin-shaped connecting part with a transverse plate (damping plate) situated on its lower extension and wherein the damping plate is immersed into the viscous fluid, characterised in that the gas-filled hollow space, the volume of which can be modified by the compression, has a taper shaped construction.
So that not to allow the excess pressure of the compressed air to be too high, the hollow space filled with the gas preferably has a certain size. To prevent the mixing of the fluid with the consequent changing of the viscosity of the gas in an undefined manner, resulting in the cancellation of the damping properties, the hollow space has an upward tapered construction. This will ensure that the gas will be always at the highest position.
The characteristics of the spring can also be influenced by the volume of the gas. By compressing the gas a force is produced that counteracts the load. The smaller the hollow space, the greater the reaction force. The spring characteristics, that is almost linear in the case of large gas volumes (Fig.3) is very progressive in the case of small gas volumes (Fig.4).
The dimensions of the hollow space are preferably such, that it is 1.5 times that of the space capacity additionally occupied by the rubber part when under load. In this manner the support is capable to compensate for 1:4 fluctuations of the base load, resulting from the changing of the loaded S :49294 state from tare load to full load, without any impairment of the spring effect.
The gas pressure in the hollow space preferably is pre-set.
The pressure prevailing in the hollow space preferably is adjustable during operation. The gas pressure preferably is adjustable depending on the loaded state of the spring under load.
The hydraulic spring preferably is to be used as a primary spring for a rail bound vehicle.
It is particularly advantageous to modify the carrying capacity of the spring by modifying the gas pressure. On this occasion the gas cushion assumes a share of the task of the spring, similarly to a pneumatic spring. This can be, arranged by pre-setting the pressure during manufacture. It is even neater to carry this out during operation by regulating the gas pressure depending on the loaded state.
Drawings The hydraulic spring according to a preferred embodiment of the invention is explained in detail in the following based on an embodiment. They show in: Fig.l a longitudinal section through a hydraulic spring in the non-loaded state, Fig.2 a longitudinal section through the same hydraulic spring in the loaded state, Fig.3 a travel/force spring characteristic at large gas volumes; and S:49294 Fig.4 a travel/force spring characteristic at small gas volumes.
Description of a Preferred Embodiment The embodiment of the hydraulic support 1 according to the preferred embodiment illustrated longitudinally sectioned in Figs.l and 2 has a pot-shaped housing 4 that is filled with a viscous hydraulic fluid 6. The upper closure of the potshaped housing 6 is formed by a spring element 8 from a rubber-elastic material. On its external circumference this spring element 8 is vulcanised onto an outer ring 10. In the axial direction the spring element 8 is connected with a rod-shaped connecting part (fastening bolt) 12.
The outer ring 10 is fastened by means of bolts 14 pressuretight on the upper edge of the pot-shaped housing 4. Between the surface 16 of the hydraulic fluid 6 and the spring element 8 there is a hollow space 18 filled with gas. On its lower end the fastening bolt 12 has an extension 20 (plunger 20, 22) that is provided with a transverse plate (damping plate) 22. The damping plate 22 is immersed into the highly viscous fluid 6. In the case of deflecting movements of the spring element 8 a damping is carried out by displacing the fluid 6.
A reference herein to a prior art document is not an admission that the document forms part of the common general knowledge in the art in Australia.
S:49294 Reference numerals 2 Hydraulic support, Spring 4 Pot-shaped housing 6 (Hydraulic) fluid 8 Spring element, Rubber part Outside ring 12 Rod-shaped connecting part, (Fastening) bolt 14 Bolt(s) 16 Surface of the hydraulic fluid 18 Gas, Hollow space (Lower) extension of the rod-shaped connecting part 22 Transverse plate, Damping plate S:49294
Claims (7)
1. A hydraulic spring with a pot-shaped housing that at the top is closed pressure-tight by a spring element made from rubber-elastic material and is partially filled with a gas and otherwise with a hydraulic fluid, wherein the spring element has an axially arranged pin-shaped connecting part with a transverse plate (damping plate) situated on its lower extension and wherein the damping plate is immersed into the viscous fluid, characterised in that the gas- filled hollow space, the volume of which can be modified by the compression, has a taper shaped construction.
2. A hydraulic spring according to claim 1, characterised in that the sizes of the hollow space in the unloaded state is 1.5 times that of the space volume additionally occupied by the spring element when under load.
3. A hydraulic spring according to claim 1 or 2, characterised by a pre-setting of the gas pressure in the hollow space.
4. A hydraulic spring according to any one of claims 1 to 3, characterised in that the pressure prevailing in the hollow space can be adjusted during the operation.
A hydraulic spring according to claim 4, characterised in that the adjustment of the gas pressure can be carried out depending from the loaded state of the spring under load.
6. A hydraulic spring according to any one of claims 1 to to be used as primary spring for a railbound vehicle. S:49294
7. A hydraulic spring substantially as herein described with reference to the accompanying drawings. Dated this 27th day of May 2003 ContiTech Luftfedersysteme GmbH By their Patent Attorneys GRIFFITH HACK S:49294
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP02012174A EP1369616B1 (en) | 2002-06-03 | 2002-06-03 | Hydraulic spring used as principal spring in rail vehicles |
| EP02012174.5 | 2002-06-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2003204401A1 true AU2003204401A1 (en) | 2003-12-18 |
| AU2003204401B2 AU2003204401B2 (en) | 2009-01-22 |
Family
ID=29433092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2003204401A Ceased AU2003204401B2 (en) | 2002-06-03 | 2003-05-28 | Hydraulic spring as primary spring for railbound vehicles |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP1369616B1 (en) |
| KR (1) | KR20030094088A (en) |
| CN (1) | CN100351543C (en) |
| AT (1) | ATE343742T1 (en) |
| AU (1) | AU2003204401B2 (en) |
| DE (1) | DE50208543D1 (en) |
| ES (1) | ES2275777T3 (en) |
| MX (1) | MXPA03004808A (en) |
| RU (1) | RU2314444C2 (en) |
| TW (1) | TW200307793A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8047139B2 (en) | 2004-03-26 | 2011-11-01 | Contitech Luftfedersysteme Gmbh | Railway bogie |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10318453A1 (en) * | 2003-04-23 | 2004-11-18 | Woco Avs Gmbh | Hydraulically cushioned pneumatic spring bearing for supporting a load like a seat, a passenger compartment or a motor supports the load on a base body like a frame or motor vehicle chassis |
| ES2299831T3 (en) | 2004-03-26 | 2008-06-01 | Ab Skf | RAILWAY BOGIE. |
| EP1737716B1 (en) * | 2004-03-26 | 2017-11-15 | Ab Skf | Mounting of the primary suspension in a railway bogie |
| EP1900965A1 (en) * | 2006-09-18 | 2008-03-19 | Carl Freudenberg KG | Hydraulic spring |
| CN102011822B (en) * | 2010-10-20 | 2013-03-20 | 哈尔滨工程大学 | Hybrid vibration isolator |
| CN102278405A (en) * | 2011-05-23 | 2011-12-14 | 扬州市明瑞气弹簧有限公司 | Relative stiffness locked non-floating piston air spring |
| DE102016222950A1 (en) | 2016-11-21 | 2018-05-24 | Aktiebolaget Skf | Bogie of a rail freight car |
| CN107701702A (en) * | 2017-10-17 | 2018-02-16 | 株洲时代新材料科技股份有限公司 | A kind of hydraulic support device for gear-box |
| CN110735880A (en) | 2019-09-06 | 2020-01-31 | 株洲时代新材料科技股份有限公司 | Sealing method of liquid composite spring |
| CN110630679A (en) * | 2019-09-06 | 2019-12-31 | 株洲时代新材料科技股份有限公司 | Chamber for liquid compound spring |
| CN112145609A (en) * | 2020-09-29 | 2020-12-29 | 湖南铁路科技职业技术学院 | Axle box spring with strong damping characteristic |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL239524A (en) * | 1958-05-27 | |||
| DE2712641A1 (en) * | 1977-03-23 | 1978-09-28 | Phoenix Gummiwerke Ag | Elastic engine mounting for vehicle - has hydraulic and pneumatic damper sections to absorb large amplitude and noise vibrations |
| DE3267031D1 (en) * | 1981-09-30 | 1985-11-28 | Oerlikon Buehrle Ag | Levelling valve for load-responsive vehicle air spring devices |
| DE8609027U1 (en) * | 1986-04-04 | 1986-05-22 | Adolf Fähnle GmbH & Co KG, 7320 Göppingen | Combined air-rubber spring |
| DE69505436T2 (en) | 1994-02-15 | 1999-06-10 | Fukoku Kk | Liquid-filled warehouse |
| US5464196A (en) * | 1994-04-20 | 1995-11-07 | Fabreeka International, Inc. | Vibration isolator |
| JP3537872B2 (en) * | 1994-08-25 | 2004-06-14 | 倉敷化工株式会社 | Fluid-filled engine mount and method of manufacturing the same |
| JPH09177869A (en) * | 1995-12-28 | 1997-07-11 | Kurashiki Kako Co Ltd | Liquid seal type engine mount and manufacture thereof |
-
2002
- 2002-06-03 ES ES02012174T patent/ES2275777T3/en not_active Expired - Lifetime
- 2002-06-03 EP EP02012174A patent/EP1369616B1/en not_active Expired - Lifetime
- 2002-06-03 AT AT02012174T patent/ATE343742T1/en active
- 2002-06-03 DE DE50208543T patent/DE50208543D1/en not_active Expired - Lifetime
-
2003
- 2003-04-18 TW TW092109046A patent/TW200307793A/en unknown
- 2003-05-28 AU AU2003204401A patent/AU2003204401B2/en not_active Ceased
- 2003-05-29 MX MXPA03004808A patent/MXPA03004808A/en active IP Right Grant
- 2003-06-02 KR KR10-2003-0035251A patent/KR20030094088A/en not_active Application Discontinuation
- 2003-06-02 RU RU2003116279/11A patent/RU2314444C2/en not_active IP Right Cessation
- 2003-06-03 CN CNB031363822A patent/CN100351543C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8047139B2 (en) | 2004-03-26 | 2011-11-01 | Contitech Luftfedersysteme Gmbh | Railway bogie |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1487219A (en) | 2004-04-07 |
| RU2314444C2 (en) | 2008-01-10 |
| KR20030094088A (en) | 2003-12-11 |
| MXPA03004808A (en) | 2005-07-01 |
| TW200307793A (en) | 2003-12-16 |
| DE50208543D1 (en) | 2006-12-07 |
| EP1369616B1 (en) | 2006-10-25 |
| ATE343742T1 (en) | 2006-11-15 |
| AU2003204401B2 (en) | 2009-01-22 |
| EP1369616A1 (en) | 2003-12-10 |
| CN100351543C (en) | 2007-11-28 |
| ES2275777T3 (en) | 2007-06-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) | ||
| MK14 | Patent ceased section 143(a) (annual fees not paid) or expired |