GB2048429A - Reinforcement in rolling bellows of fluid springs - Google Patents
Reinforcement in rolling bellows of fluid springs Download PDFInfo
- Publication number
- GB2048429A GB2048429A GB8010937A GB8010937A GB2048429A GB 2048429 A GB2048429 A GB 2048429A GB 8010937 A GB8010937 A GB 8010937A GB 8010937 A GB8010937 A GB 8010937A GB 2048429 A GB2048429 A GB 2048429A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bellows
- reinforcing members
- plies
- belt
- beads
- 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
- 238000005096 rolling process Methods 0.000 title description 3
- 239000012530 fluid Substances 0.000 title 1
- 230000002787 reinforcement Effects 0.000 title 1
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 19
- 239000011324 bead Substances 0.000 claims abstract description 13
- 239000000725 suspension Substances 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000004033 plastic Substances 0.000 claims abstract description 4
- 229920003023 plastic Polymers 0.000 claims abstract description 4
- 229920001971 elastomer Polymers 0.000 claims abstract description 3
- 239000005060 rubber Substances 0.000 claims abstract description 3
- 239000004744 fabric Substances 0.000 description 5
- 230000001154 acute effect Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J3/00—Diaphragms; Bellows; Bellows pistons
- F16J3/04—Bellows
- F16J3/041—Non-metallic bellows
- F16J3/042—Fastening details
-
- 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
- F16F9/0409—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 characterised by the wall structure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Diaphragms And Bellows (AREA)
- Fluid-Damping Devices (AREA)
Abstract
A roller bellows for vehicle pneumatic suspensions, which is made of rubber or rubber-like plastics materials and has two or more plies of embedded filament-like reinforcing members 6 extending between the securing beads 31 at an angle relative to the longitudinal axis of the bellows, is in addition provided with a belt located in the central region of the roller bellows and formed by two plies of reinforcing members 8 which are the same as the reinforcing members 6 the plies of the belt being located between the two plies of reinforcing members 6. <IMAGE>
Description
SPECIFICATION
Roller bellows for pneumatic suspensions for vehicles
The present invention relates to a roller bellows for pneumatic suspensions for vehicles, made of runner or rubber-like plastics materials and having two or more plies of embedded filament-like reinforcing members extending between the securing beads at an angle relative to the longitudinal axis of the bellows and additionally is provided with a belt located in the central region of the roller bellows, the belt being formed of filament-like reinforcing members which extend parallel to and are the same as the reinforcing members extending between the beads. Such arrangement is disclosed in our co-pending application No.
8003845.
Such co-pending application solves the problem of rendering the roller bellows, without impairing their life duration and their general usefulness, capable of absorbing higher internal pressure required for reasons of improved deflection behaviour-substanti- ally of the order of magnitude of up to 20 bar and more compared with hitherto operating pressures of from 7 to 9 bar, by incorporating a belt in the bellows wall adapted in filament structure of the reinforcing plies of the roller bellows, whereby this belt already due to the simplified manufacture is located externally of the reinforcing plies and separate therefrom.
Such roller bellows in practical driving tests indeed lives up to expectations, but during long period tests the bellows at first displayed unexplainable damage in the transition regions to the roller fold adjacent to the belt when the bellows have frequently been subjected to extreme deflection movements. The object of the present invention is to protect the roller bellows from such damage as effectively as possible and clearly to extend their life without making concessions to their favourable deflecting properties.
According to the present invention there is provided a roller bellows for vehicle pneumatic suspensions, made of rubber or rubber-like plastics materials and having two or more plies of embedded filament-like reinforcing members extending between the securing beads at an angle relative to the longitudinal axis of the bellows and, in addition is provided with a belt located in the central region of the roller bellows and formed by two reinforcing members which are the same as the reinforcing members extending between the beads, in which the belt is located between the two plies of reinforcing members extending between the beads.
The invention hence abandons the conventional structure diagram and shifts the belt as a whole into the interior of the continuously extending reinforcing ply. As a surprising feature of this arrangement it was possible, under otherwise identical conditions for the life of the novel bellows to be substantially longer than a roller bellows fitted with an external belt. This favourable effect is to be attributed to the fact that the belt edges, in their critical transition region, are continuously covered by the ply layers abutting thereon and their dynamic behaviour within the bellows wall is absorbed or dampened and levelled out, so that the local stresses leading to fatigue fissures do not occur.
The present invention will be further illustrated by way of example, with reference to the accompanying drawing in which the single Figure is a fragmentary section in the longitudinal direction of a pneumating spring roller bellows in the assembled state.
The roller bellows 3 shown in the drawing is inserted between the superstructure and an axle of an automative vehicle in such a manner that, in the course of deflecting movements, it is in rolling engagement with the conical outer surfaces of two supporting pistons 4 associated with mutually suspended vehicle components. The supporting pistons 4, in turn, support slightly conical mounting projections 5, onto which projections the beads 31 of the roller bellows 3 are slipped during installation of the bellows and against which, during use, they hermetically seal off the bellows interior.
The roller bellows 3 is made of synthetic rubber and is produced in the form of a tubular body having beads 31 drawn in in diameter at both ends, and is reinforced by two fabric plies 6 embedded in the wall of the tubular body. The filaments of the fabric plies 6 shown in full lines in the drawing in the region of the maximum bellows diameter be .tween the beads extend at an acute angle relative to the cross-sectional plane of the bellows and are anchored in the beads 31 by being wrapped around rigid core rings 7 and folding over. The central cylindrical section of the roller bellows not participating in the resilient deformations is thickened relative to the adjacent walls by the provision of a belt 8 located between the fabric plies 6 and also being formed of two plies of reinforcing members. The two belt plies shown in broken lines each individually are comprised of unwoven filaments or wires extending at an acute angle relative to the cross-sectional plane of the bellows, and which intersect from one ply to the other and consequently extend substantially parallel to the fabric filaments of the plies 6. The outer ply of the belt 8, in the embodiment shown in the drawing, is drawn upwardly and downwardly over the inner ply until drawn forward into the cord portions of the roller bellows and therefore, during extensive deflection, participates in the rolling off movements, whereby the abutting outermost layer of the fabric ply 6 in turn absorbs the transitional movements and makes it flowing.
Claims (2)
1. A roller bellows for vehicle pneumatic suspensions, made of rubber or rubber-like plastics materials and having two or more plies of embedded filament-like reinforcing members extending between the securing beads at an angle relative to the longitudinal axis of the bellows and, in addition is provided with a belt located in the central region of the roller bellows and formed by two reinforcing members which are the same as the reinforcing members extending between the beads in which the belt is located between the two plies of reinforcing members extending between the beads.
2. A roller bellows for vehicle pneumatic suspensions, substantially as hereinbefore described with reference to and as illustrated in the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19792913846 DE2913846A1 (en) | 1979-04-06 | 1979-04-06 | ROLL BELLOWS FOR VEHICLE AIR SUSPENSIONS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2048429A true GB2048429A (en) | 1980-12-10 |
| GB2048429B GB2048429B (en) | 1983-05-18 |
Family
ID=6067593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8010937A Expired GB2048429B (en) | 1979-04-06 | 1980-04-01 | Reinforcement in rolling bellows of fluid springs |
Country Status (4)
| Country | Link |
|---|---|
| DE (1) | DE2913846A1 (en) |
| FR (1) | FR2453322A2 (en) |
| GB (1) | GB2048429B (en) |
| IT (1) | IT1131409B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101040132B (en) * | 2004-10-15 | 2011-03-30 | 康蒂特克空气弹簧系统有限责任公司 | Air spring |
| EP2183503A4 (en) * | 2007-08-31 | 2015-08-05 | Firestone Ind Products Co Llc | Spring body for gas spring assembly and method of forming same |
| US20220373054A1 (en) * | 2019-11-04 | 2022-11-24 | Danto Invention Gmbh & Co. Kg | Flexible spring element made of a fibre-reinforced plastics composite material |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102009028158A1 (en) * | 2009-07-31 | 2011-03-24 | Saf-Holland Gmbh | Air bellows for an air spring |
| FR3129444A1 (en) * | 2021-11-23 | 2023-05-26 | Max Sardou | Composite bellows suspension spring |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3897941A (en) * | 1974-03-28 | 1975-08-05 | Goodyear Tire & Rubber | Reinforced fluid spring |
| AT340209B (en) * | 1975-04-07 | 1977-12-12 | Taurus Gumiipari Vallalat | BELLOWS FOR AIR SPRINGS |
| DE2547409A1 (en) * | 1975-10-23 | 1977-04-28 | Continental Gummi Werke Ag | AIR BELLOWS, IN PARTICULAR ROLLING BOWLS FOR VEHICLE SUSPENSIONS |
-
1979
- 1979-04-06 DE DE19792913846 patent/DE2913846A1/en not_active Ceased
-
1980
- 1980-03-14 IT IT20660/80A patent/IT1131409B/en active
- 1980-04-01 GB GB8010937A patent/GB2048429B/en not_active Expired
- 1980-04-03 FR FR8007575A patent/FR2453322A2/en active Granted
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101040132B (en) * | 2004-10-15 | 2011-03-30 | 康蒂特克空气弹簧系统有限责任公司 | Air spring |
| EP2183503A4 (en) * | 2007-08-31 | 2015-08-05 | Firestone Ind Products Co Llc | Spring body for gas spring assembly and method of forming same |
| US20220373054A1 (en) * | 2019-11-04 | 2022-11-24 | Danto Invention Gmbh & Co. Kg | Flexible spring element made of a fibre-reinforced plastics composite material |
| US11994187B2 (en) * | 2019-11-04 | 2024-05-28 | Danto Invention Gmbh & Co. Kg | Flexible spring element made of a fibre-reinforced plastics composite material |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1131409B (en) | 1986-06-25 |
| DE2913846A1 (en) | 1980-10-23 |
| FR2453322A2 (en) | 1980-10-31 |
| GB2048429B (en) | 1983-05-18 |
| FR2453322B1 (en) | 1984-05-18 |
| IT8020660A0 (en) | 1980-03-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19960401 |