AU2003204401B2 - Hydraulic spring as primary spring for railbound vehicles - Google Patents

Hydraulic spring as primary spring for railbound vehicles Download PDF

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Publication number
AU2003204401B2
AU2003204401B2 AU2003204401A AU2003204401A AU2003204401B2 AU 2003204401 B2 AU2003204401 B2 AU 2003204401B2 AU 2003204401 A AU2003204401 A AU 2003204401A AU 2003204401 A AU2003204401 A AU 2003204401A AU 2003204401 B2 AU2003204401 B2 AU 2003204401B2
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AU
Australia
Prior art keywords
spring
hydraulic
gas
hollow space
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.)
Ceased
Application number
AU2003204401A
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AU2003204401A1 (en
Inventor
Volker Gedenk
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ContiTech Luftfedersysteme GmbH
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ContiTech Luftfedersysteme GmbH
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Publication of AU2003204401A1 publication Critical patent/AU2003204401A1/en
Application granted granted Critical
Publication of AU2003204401B2 publication Critical patent/AU2003204401B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F16F13/08—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
    • 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

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 00 O Summary of the Invention o The present invention provides a hydraulic spring with a Shousing 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 to form a gas filled hollow space above the hydraulic fluid, wherein the spring element has an axially arranged elongate connecting part with a transverse plate S(damping plate) situated on its lower extension and wherein the damping plate is immersed into the viscous fluid, characterized 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 N:PerthCases\Patent49000P4999\P49294.AUSpesP49294.AU Specificalion 2008-11-24.doc 24/11/08 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 (6)

1. A hydraulic spring with a 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 to form a gas filled hollow space above the hydraulic fluid, wherein the spring element has a axially arranged elongate connecting part Swith a transverse plate (damping plate) situated on its lower extension and wherein the damping plate is immersed into the viscous fluid, characterized in that the gas- filled hollow space, the volume of which can be modified by the compression, has a taper shaped construction whereby 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.
2. A hydraulic spring according to claim 1, characterised by a pre-setting of the gas pressure in the hollow space.
3. A hydraulic spring according to any one claims 1 or 2, characterised in that the pressure prevailing in the hollow space can be adjusted during the operation.
4. A hydraulic spring according to claim 3, characterized in that the adjustment of the gas pressure can be carried out depending from the loaded state of the spring under load.
A hydraulic spring according to any one claims 1 to 4 to be used as primary spring for a railbound vehicle.
6. A hydraulic spring substantially as herein described with reference to the accompanying drawings. N:Perth\Cases\Patent\490-499949 99A pe\49294Ae 4 AU Specification 2008-11-24doc 28/11/08
AU2003204401A 2002-06-03 2003-05-28 Hydraulic spring as primary spring for railbound vehicles Ceased AU2003204401B2 (en)

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 AU2003204401A1 (en) 2003-12-18
AU2003204401B2 true 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)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
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
MXPA06010136A (en) * 2004-03-26 2007-03-07 Contitech Luftfedersyst Gmbh Railway bogie.
US8047139B2 (en) 2004-03-26 2011-11-01 Contitech Luftfedersysteme Gmbh Railway bogie
MXPA06010142A (en) * 2004-03-26 2007-03-07 Skf Ab 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
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
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
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP0075969A1 (en) * 1981-09-30 1983-04-06 Werkzeugmaschinenfabrik Oerlikon-Bührle AG Levelling valve for load-responsive vehicle air spring devices
EP0240028A2 (en) * 1986-04-04 1987-10-07 Adolf Fähnle GmbH & Co. KG Device for spring mounted support of machines on floor
JPH09177869A (en) * 1995-12-28 1997-07-11 Kurashiki Kako Co Ltd Liquid seal type engine mount and manufacture thereof

Family Cites Families (4)

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Publication number Priority date Publication date Assignee Title
NL109403C (en) * 1958-05-27
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
EP0075969A1 (en) * 1981-09-30 1983-04-06 Werkzeugmaschinenfabrik Oerlikon-Bührle AG Levelling valve for load-responsive vehicle air spring devices
EP0240028A2 (en) * 1986-04-04 1987-10-07 Adolf Fähnle GmbH & Co. KG Device for spring mounted support of machines on floor
JPH09177869A (en) * 1995-12-28 1997-07-11 Kurashiki Kako Co Ltd Liquid seal type engine mount and manufacture thereof

Also Published As

Publication number Publication date
CN1487219A (en) 2004-04-07
DE50208543D1 (en) 2006-12-07
EP1369616A1 (en) 2003-12-10
EP1369616B1 (en) 2006-10-25
ATE343742T1 (en) 2006-11-15
MXPA03004808A (en) 2005-07-01
AU2003204401A1 (en) 2003-12-18
ES2275777T3 (en) 2007-06-16
RU2314444C2 (en) 2008-01-10
CN100351543C (en) 2007-11-28
KR20030094088A (en) 2003-12-11
TW200307793A (en) 2003-12-16

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