DE19939969A1 - Spring shock absorber system for wheel suspension or axles of motor vehicles has differential U-bellows with fluid-filled chamber connected to hydraulic accumulator - Google Patents
Spring shock absorber system for wheel suspension or axles of motor vehicles has differential U-bellows with fluid-filled chamber connected to hydraulic accumulatorInfo
- Publication number
- DE19939969A1 DE19939969A1 DE1999139969 DE19939969A DE19939969A1 DE 19939969 A1 DE19939969 A1 DE 19939969A1 DE 1999139969 DE1999139969 DE 1999139969 DE 19939969 A DE19939969 A DE 19939969A DE 19939969 A1 DE19939969 A1 DE 19939969A1
- Authority
- DE
- Germany
- Prior art keywords
- bellows
- piston
- double
- suspension device
- rolling
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/08—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
- B60G11/265—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs hydraulic springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
- B60G15/08—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring
- B60G15/12—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring and fluid 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
- F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
-
- 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
- F16F9/06—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid
- F16F9/08—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall
- F16F9/084—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using both gas and liquid where gas is in a chamber with a flexible wall comprising a gas spring contained within a flexible wall, the wall not being in contact with the damping fluid, i.e. mounted externally on the damper cylinder
-
- 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
- F16F9/32—Details
- F16F9/3207—Constructional features
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/10—Type of spring
- B60G2202/15—Fluid spring
- B60G2202/154—Fluid spring with an accumulator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/30—Spring/Damper and/or actuator Units
- B60G2202/31—Spring/Damper and/or actuator Units with the spring arranged around the damper, e.g. MacPherson strut
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2202/00—Indexing codes relating to the type of spring, damper or actuator
- B60G2202/30—Spring/Damper and/or actuator Units
- B60G2202/31—Spring/Damper and/or actuator Units with the spring arranged around the damper, e.g. MacPherson strut
- B60G2202/314—The spring being a pneumatic spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/40—Constructional features of dampers and/or springs
- B60G2206/42—Springs
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
Description
Die Erfindung betrifft eine druckmittelbeaufschlagbare Federungsvorrichtung, insbesondere für zwei- und mehrachsige Fahrzeuge, gemäß dem Oberbegriff des Anspruchs 1.The invention relates to a pressurizable medium Suspension device, especially for two and multi-axle vehicles, according to the preamble of the claim 1.
Aus zahlreichen Publikationen und aus der Praxis sind diverse Kraftfahrzeug-Luftfedern bekannt. Sie bestehen im wesentlichen aus einem Rollbalg, der ein Luftvolumen umschließt und an seinem einen Ende von einer chassisfesten Abdeckplatte und an seinem anderen Ende von einem radseitigen Abrollkolben begrenzt wird. Solche herkömmlichen Luftfedern weisen keine Kippstabilität auf, so daß zusätzliche Maßnahmen zur Längs- und Querführung erforderlich sind.From numerous publications and from practice various automotive air springs known. They consist in essentially from a bellows that is an air volume encloses and at one end of a chassis-fixed Cover plate and at its other end from one wheel-side rolling piston is limited. Such conventional air springs have no tilting stability, so that additional measures for longitudinal and transverse guidance required are.
Die Aufgabe der Erfindung besteht darin, eine druckmittelbeaufschlagbare Federungsvorrichtung zu schaffen, die im Federungsverhalten und in der Federhöhe regelbar ist und bei der auf externe Längs- und Querlenker gänzlich oder zumindest weitgehend verzichtet werden kann. Die Lösung dieser Aufgabe ist mit den in den Patentansprüchen genannten Merkmalen gegeben. The object of the invention is a suspension device that can be pressurized create that in suspension behavior and in the spring height is adjustable and on the external trailing and wishbones can be dispensed with entirely or at least largely. The solution to this problem is with the in the Features mentioned claims given.
Die beiden Abrollkolbenhälften nebst den beiden zugehörigen Doppelrollbalghälften der erfindungsgemäßen Federungsvorrichtung geben eine selbstzentrierende Führung zwischen Doppelabrollkolben und Außenmantel. Wegen des - verglichen mit herkömmlichen Luftfedern - relativ hohen Betriebsdrucks ist diese radiale Führung besonders stabil. Andererseits wird wegen der gummielastischen Entkopplung von Kolben und Außenmantel eine höherfrequente Schwingungsanregung weggefiltert. Die Gestalt der Federungsvorrichtung als Doppelrollbalgfeder ist langgestreckt, womit außer der sehr guten radialen (Seiten- )Führung auch eine gute Längsführung gegeben ist. Aus diesem Grunde kann auf separate Längs- und Querlenker weitgehend oder sogar gänzlich verzichtet werden.The two rolling piston halves along with the two associated Double roll bellows halves of the invention Suspension device give self-centering guidance between the double rolling piston and the outer jacket. Because of the - compared to conventional air springs - relatively high Operating pressure, this radial guide is particularly stable. On the other hand, because of the rubber-elastic decoupling a higher frequency of piston and outer jacket Vibration excitation filtered away. The shape of the Suspension device as a double bellows spring elongated, which apart from the very good radial (lateral ) Leadership also gives good longitudinal guidance. Out this is why you can use separate trailing arms and wishbones be largely or even entirely dispensed with.
Die Federkraft wird von der Differenz der wirksamen Krümmungsradien der beiden Rollbälge (Doppelrollbalghälften) bestimmt. Die Krümmungsradien der Rollbälge ergeben sich aus den Differenzen der Radien (bzw. Durchmesser) vom Mantelzylinder und den beiden Kolben(- Hälften). Ist die Differenz der jeweiligen Kolbenradien gering, so ist die Differenz der Krümmungsradien der Rollbälge ebenfalls gering. Dies hat zur Folge, daß mit hohem Betriebsdruck gearbeitet werden kann (bzw. muß), wie er bei aktiven Fahrwerksregelungen gefordert wird.The spring force is effective from the difference Radii of curvature of the two bellows (Double bellows halves) determined. The radii of curvature of the Rolling bellows result from the differences in the radii (or Diameter) from the jacket cylinder and the two pistons (- Halves). Is the difference between the respective piston radii the difference in the radii of curvature is small Rolling bellows also low. As a result, with high operating pressure can (or must) be worked, such as it is required for active chassis controls.
Die Differenz der wirksamen Rollbalg-Krümmungsradien kann statt mittels einer Differenz der Kolbenradien auch mittels einer Radien-Differenz der wirksamen Außenmantel-Abschnitte realisiert werden.The difference in the effective roll bellows radii of curvature can instead of using a difference in piston radii a radius difference of the effective outer jacket sections will be realized.
Die entgegengesetzt zueinander angeordneten Rollbälge werden einerseits am Außenmantel und andererseits am Kolben mittels Spannringen mechanisch zuverlässig fest und pneumatisch/hydraulisch dicht eingeklemmt.The bellows arranged opposite to each other are on the one hand on the outer jacket and on the other hand on the piston mechanically reliably and securely by means of clamping rings pneumatically / hydraulically tightly clamped.
Das Befüllen der Feder und die Regelung, insbesondere die Einstellung der Federhöhe, aber auch eine Wankregelung, kann mittels einer geregelten Druckpumpe erfolgen, die an am Außenmantel befindlichen Rohrstutzen anzuschließen ist. Außerdem kann ein Speichervolumen angeschlossen werden.Filling the spring and regulating, especially the Adjustment of the spring height, but also a roll control, can be done by means of a regulated pressure pump is to be connected to the pipe socket located on the outer jacket. A storage volume can also be connected.
Zur Aufnahme eines Stoßdämpfers ist der Kolben vorzugsweise hohlzylindrisch ausgebildet. Auf diese Weise kann auf einen separat angeordneten Stoßdämpfer verzichtet werden. Das spart sowohl zusätzlichen Bauraum als auch zusätzliche Montagearbeit. Der von dem Federmantel umhüllte Stoßdämpfer ist vor Straßenschmutz geschützt.The piston is preferred for receiving a shock absorber hollow cylindrical design. In this way, one can separately arranged shock absorbers can be dispensed with. The saves both additional space and additional space Assembly work. The shock absorber wrapped in the spring jacket is protected from street dirt.
Das Federvolumen der Rollbälge kann wahlweise mit einem komprimierbaren Gas (vorzugsweise Luft) oder mit Hydraulikflüssigkeit gefüllt werden.The spring volume of the bellows can be optionally with a compressible gas (preferably air) or with Hydraulic fluid to be filled.
Anhand der Zeichnung, die die Federungsvorrichtung im Längsschnitt zeigt, werden Aufbau und Wirkungsweise erläutert.Using the drawing, which the suspension device in Longitudinal section shows structure and mode of action explained.
Die Federungsvorrichtung 2 besteht aus einem Mantel 4, der zylindrisch ausgebildet ist, und einem innenliegenden Kolben 6. Der koaxial zum Außenmantel 4 angeordnete Kolben 6 ist als Doppelabrollkolben ausgebildet. Der erste (obere) Teilkolben 6a des Doppelabrollkolbens 6 hat den Außendurchmesser Da, der zweite (untere) Teilkolben 6b hat den Außendurchmesser Db. Der aus den Teilkolben 6a und 6b bestehende Kolben 6 ist innerhalb des den Innendurchmesser D, aufweisenden Mantelzylinders 4 axial beweglich. The suspension device 2 consists of a jacket 4 , which is cylindrical, and an internal piston 6 . The piston 6 arranged coaxially to the outer jacket 4 is designed as a double rolling piston. The first (upper) part of the piston 6 a Doppelabrollkolbens 6 has the outer diameter Da, the second (lower) part of piston 6 has b the outer diameter Db. The piston 6 consisting of the partial pistons 6 a and 6 b is axially movable within the jacket cylinder 4 having the inside diameter D.
Die lichten Weiten D1-Da bzw D1-Db zwischen den Teilkolben 6a und 6b und dem Außenmantel 4 werden von zwei gegeneinander angeordneten Rollbälgen 8a und 8b ausgefüllt. Die Rollbälge 8a, 8b bilden einen Doppelrollbalg 8 und bestehen aus elastomerem, mit Gewebeeinlage verstärktem Material. Der eine (erste) Rollbalg 8a ist dem einen Teilkolben 6a zugeordnet, während der andere (zweite) Rollbalg 8b den anderen Teilkolben 6b umhüllt. Die Enden der Rollbälge 8a, 8b sind einerseits am Kolben 6 mittels Spannringen 12a, 12b andererseits am Außenmantel 4 mittels eines Außenringes 16 nebst Spannringen 24a, 14b druckdicht eingespannt. Der Außenring weist zwei Rohrstutzen 18, 20 zum Anschluß einer Pumpe und eines Federspeichers (nicht dargestellt) auf; über die Rohrstutzen 18, 20 ist die Federungsvorrichtung 2 regelbar.The clear widths D 1 -Da and D 1 -Db between the partial pistons 6 a and 6 b and the outer jacket 4 are filled by two bellows 8 a and 8 b arranged opposite one another. The rolling bellows 8 a, 8 b and 8 form a Doppelrollbalg consist of elastomer, reinforced with fabric reinforcement material. One (first) rolling bellows 8 a is assigned to one partial piston 6 a, while the other (second) rolling bellows 8 b envelops the other partial piston 6 b. The ends of the roller bellows 8 a, 8 b are clamped pressure-tight on the one hand on the piston 6 by means of clamping rings 12 a, 12 b on the other hand on the outer casing 4 by means of an outer ring 16 together with clamping rings 24 a, 14 b. The outer ring has two pipe sockets 18 , 20 for connecting a pump and a spring accumulator (not shown); The suspension device 2 can be regulated via the pipe socket 18 , 20 .
Der in der Zeichnung dargestellte Kolben 6 ist hohlzylindrisch ausgebildet. Sein Inneres enthält einen Stoßdämpfer 22, dessen Rohr mittels eines Sprengringes 30 am oberen Kolbenende befestigt ist. Die Dichtigkeit zwischen Stoßdämpfer(-Rohr) 22 und Kolben 6 wird mittels dreier O-Ringe 32, 34, 36 realisiert. Die Stoßdämpferstange 24 ist an einer auf dem Mantelzylinder 4 befindlichen Abdeckplatte 26 befestigt.The piston 6 shown in the drawing is hollow-cylindrical. Its interior contains a shock absorber 22 , the tube of which is attached to the upper piston end by means of a snap ring 30 . The tightness between shock absorber (tube) 22 and piston 6 is achieved by means of three O-rings 32 , 34 , 36 . The shock absorber rod 24 is attached to a cover plate 26 located on the jacket cylinder 4 .
Wird der radseitig befestigte Kolben 6 axial relativ zum chassisseitigen Mantelzylinder 4 bewegt, so rollen die beiden zwischen Kolben 6 und Mantelzylinder 4 befindlichen Rollbälge 8a, 8b einerseits auf der Außenfläche des Kolbens 6 und andererseits auf der Innenfläche des Mantelzylinders 4 ab. Die sich bei Druckbeaufschlagung der Rollbälge 8a, 8b mit Druckluft bzw. Hydraulikflüssigkeit ergebende axiale Kraft ist der Differenz der wirksamen Rollbalg- Krümmungsradien proportional. If the wheel-side attached piston 6 is moved axially relative to the chassis-side jacket cylinder 4 , then the two bellows 8 a, 8 b located between the piston 6 and jacket cylinder 4 roll on the one hand on the outer surface of the piston 6 and on the other hand on the inside surface of the jacket cylinder 4 . The axial force resulting when pressurizing the bellows 8 a, 8 b with compressed air or hydraulic fluid is proportional to the difference between the effective roll bellows radii of curvature.
22nd
Federungsvorrichtung
Suspension device
44th
Mantel(zylinder), Außenmantel, Außenführung
Jacket (cylinder), outer jacket, outer guide
66
Kolben, Doppelabrollkolben
Piston, double roll-off piston
66
a erster (Teil-)Kolben, Abrollkolbenhälfte
a first (partial) piston, rolling piston half
66
b zweiter (Teil-)Kolben, Abrollkolbenhälfte
b second (partial) piston, rolling piston half
88th
Verbindungsmittel, Doppelrollbalg
Lanyard, double roller bellows
88th
a erster Rollbalg, Doppelrollbalghälfte
a first roll bellows, double roll bellows half
88th
b zweiter Rollbalg, Doppelrollbalghälfte
b second roll bellows, double roll bellows half
1010th
Federvolumen
Spring volume
1212th
a erster Spannring/Kolben
a first clamping ring / piston
1212th
b zweiter Spannring/Kolben
b second clamping ring / piston
1414
a erster Spannring/Mantelzylinder
a first clamping ring / jacket cylinder
1414
b zweiter Spannring/Mantelzylinder
b second clamping ring / jacket cylinder
1616
Außenring
Outer ring
1818th
Rohrstutzen, Anschluß Federspeicher
Pipe socket, connection spring spring
2020th
Rohrstutzen, Anschluß Pumpe
Pipe socket, pump connection
2222
Stoßdämpfer, Stoßdämperrohr
Shock absorber, shock absorber tube
2424th
Stoßdämpferstange
Shock absorber rod
2626
Deckel/Mantelzylinder
Cover / jacket cylinder
2828
Aufweitung des Stoßdämpferrohres
Expansion of the shock absorber tube
3030th
Sprengring
Snap ring
3232
, ,
3434
, ,
3636
O-ring
D1 O-ring
D 1
Innendurchmeser Mantelzylinder
Da Außendurchmesser erster Kolben
Db Außendurchmesser zweiter Kolben
Inside diameter jacket cylinder
Because the outer diameter of the first piston
Db outer diameter of the second piston
Claims (10)
daß die Innenfläche des Mantels (4) zylinderförmig ausgebildet ist,
wobei der der einen Doppelrollbalghälfte (8a) zugeordnete Abschnitt des Mantels (4) - verglichen mit dem der anderen Doppelrollbalghälfte (8b) zugeordneten Abschnitt des Mantels (4) - einen unterschiedlichen (größeren/kleineren) Radius auf weist.6. Suspension device according to one of claims 1 to 5, characterized in that
that the inner surface of the casing ( 4 ) is cylindrical,
wherein the one Doppelrollbalghälfte (8a) associated portion of the shell (4) - as compared with the (8 b) associated with the portion of the shell (4) of the other Doppelrollbalghälfte - has a different (greater / smaller) radius.
daß der Kolben (6) zur Aufnahme eines Stoßdämpfers (22) hohlzylindrisch ausgebildet ist,
wobei das eine Stoßdämpfer-Ende ortsfest am unteren Ende des Kolbens (28) und das andere Stoßdämpfer-Ende (Stoßdämpferstange 24) ortsfest an einer auf dem Mantelzylinder (4) befindlichen Deckplatte (26) befestigt ist.9. Suspension device according to one of claims 1 to 8, characterized in
that the piston ( 6 ) for receiving a shock absorber ( 22 ) is hollow-cylindrical,
one end of the shock absorber being fixed in place at the lower end of the piston ( 28 ) and the other end of the shock absorber (shock absorber rod 24 ) being fixed in place on a cover plate ( 26 ) located on the jacket cylinder ( 4 ).
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999139969 DE19939969A1 (en) | 1999-08-24 | 1999-08-24 | Spring shock absorber system for wheel suspension or axles of motor vehicles has differential U-bellows with fluid-filled chamber connected to hydraulic accumulator |
DE50010763T DE50010763D1 (en) | 1999-08-24 | 2000-08-23 | SPRING DAMPER SYSTEM WITH DIFFERENTIAL ROLL BALG |
US10/069,661 US6817597B1 (en) | 1999-08-24 | 2000-08-23 | Spring-and-shock absorber system having differential roll bellows |
EP00962365A EP1206653B1 (en) | 1999-08-24 | 2000-08-23 | Spring-and-shock absorber system with differential u-bellows |
PCT/EP2000/008233 WO2001014765A1 (en) | 1999-08-24 | 2000-08-23 | Spring-and-shock absorber system with differential u-bellows |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE1999139969 DE19939969A1 (en) | 1999-08-24 | 1999-08-24 | Spring shock absorber system for wheel suspension or axles of motor vehicles has differential U-bellows with fluid-filled chamber connected to hydraulic accumulator |
Publications (1)
Publication Number | Publication Date |
---|---|
DE19939969A1 true DE19939969A1 (en) | 2001-03-15 |
Family
ID=7919333
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE1999139969 Ceased DE19939969A1 (en) | 1999-08-24 | 1999-08-24 | Spring shock absorber system for wheel suspension or axles of motor vehicles has differential U-bellows with fluid-filled chamber connected to hydraulic accumulator |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE19939969A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10224442C1 (en) * | 2002-06-01 | 2003-10-09 | Contitech Luftfedersyst Gmbh | Spring device used in a pneumatic or hydraulic spring system of a motor vehicle comprises a dirt bellows arranged between an unrolling piston and an outer casing to act as an end stop |
EP1369267A3 (en) * | 2002-06-05 | 2005-04-06 | DaimlerChrysler AG | Hydraulic suspension strut with guidance |
US6905113B2 (en) * | 2001-12-22 | 2005-06-14 | Contitech Luftfedersysteme Gmbh | Double rolling-lobe spring arrangement |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4493481A (en) * | 1977-11-12 | 1985-01-15 | Daimler-Benz Ag | Pneumatic spring for motor vehicles |
DE19704434A1 (en) * | 1997-02-06 | 1998-08-20 | Daimler Benz Ag | Bellows gas spring with dust protection |
-
1999
- 1999-08-24 DE DE1999139969 patent/DE19939969A1/en not_active Ceased
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4493481A (en) * | 1977-11-12 | 1985-01-15 | Daimler-Benz Ag | Pneumatic spring for motor vehicles |
DE19704434A1 (en) * | 1997-02-06 | 1998-08-20 | Daimler Benz Ag | Bellows gas spring with dust protection |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6905113B2 (en) * | 2001-12-22 | 2005-06-14 | Contitech Luftfedersysteme Gmbh | Double rolling-lobe spring arrangement |
DE10224442C1 (en) * | 2002-06-01 | 2003-10-09 | Contitech Luftfedersyst Gmbh | Spring device used in a pneumatic or hydraulic spring system of a motor vehicle comprises a dirt bellows arranged between an unrolling piston and an outer casing to act as an end stop |
EP1369267A3 (en) * | 2002-06-05 | 2005-04-06 | DaimlerChrysler AG | Hydraulic suspension strut with guidance |
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Owner name: CONTITECH LUFTFEDERSYSTEME GMBH, 30165 HANNOVER, D |
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Owner name: CONTITECH LUFTFEDERSYSTEME GMBH, 30165 HANNOVE, DE Owner name: DAIMLER AG, 70327 STUTTGART, DE |