gas springs and dampers for industrial applications · 2013-12-13 · gas springs and dampers for...

Gas springs and dampersfor industrial applications

STABILUS technology gives comfort

Gas springs and dampers forindustrial applications

For decades now, STABILUS gas springshave been well known for their successfuluse in the automobile industry.Since the early 1960’s, STABILUSproducts have also been used in thefurniture industry, notably for applicationsin swivel chairs.Today, the gas spring has become apractical design element in more than100 different applications.Compact design, high level of operatingconvenience and safety in use are some

of the reasons for the constant growth inthe use of gas springs for the most variedof applications.STABILUS products are found in thegeneral furniture sector, for example, toadjust table height or the angle of headand foot sections of beds. In the medicalengineering industry, gas springs anddampers are used ln hospital beds,theatre couches and in the operation ofmassage and beauty couches andequipment.In the office equipment sector, gassprings are an invisible aid in thepositioning of covers and lids of

photocopiers, acoustic hoods andcomputer swivel arms. In buildings, gassprings perform the task of openingroof windows or assisting the operationof awnings.In the mechanical engineering industry,STABILUS gas springs are used to anincreasing extent in safety and noiseprotection panels which can beeffortlessly opened and closed by gassprings.The applications for STABILUSproducts are as varied as your ideas.We will be pleased to advise youregarding your specific application.

has been a supplier to the internationalvehicle, aircraft, shipbuilding, mechanicalengineering, furniture, swivel chair andbuilding industries for decades now, withever increasing success.

Each STABILUS gas spring embodiesthe experience of more than 750 millionunits produced.

Pioneering achievements

STABILUS is a member of the SachsGroup within the MANNESMANN Con-cern, with over 60 years experience inthe manufacture of hydropneumaticequipment. In addition to having producedhydraulic dampers over several decades,STABILUS presented the world’s firststandard production gas spring in 1962.

STABILUS sees itself as a problemsolver for the most varied of applica-tions and, since the start of production,has attributed the greatest significanceto perfect operation, outstanding safetyand excellent quality.

STABILUS, with its production facilitiesin Germany, the United Kingdom, Spain,Italy, the USA, Mexico and Australia,

Operating principle of a gasspring

The gas spring is a hydropneumaticadjusting element, consisting of apressure tube with a connecting fitting,a piston rod with piston system and apiston rod connection fitting.

A special seal and guide system sealsoff the interior to atmosphere. The gasspring is filled with compressed nitro-gen. The filling pressure acts on thecross-sectional area of the piston rodand produces an extension force, whichcan be freely selected within physicallimits. If the extension force of the gasspring is higher than the force of thecounterweight, the piston rod extends.If the extension force is less, it con-tracts.

The extension rate is determined by theoverflow cross-section in the pistonsystem and pressure tube, respectively.

The interior of the gas spring is fillednot only with nitrogen, but also with aprecisely defined quantity of oil which,on the one hand, ensures properlubrication of the piston and the sealguide system and, on the other,provides for proper dampening of thepiston in the end position.

The gas spring is completely mainte-nance-free in operation. In the standardversion, the gas spring is designed forat least 50.000 operations.

®

Spezialdichtungs-und Führungspaket

Druckrohrmit Füllmedium

Öl

Kolbenstange

Kolbenpaket

Druckrohr-anschluß

D 2

D 1

Kolbenstangen-anschluß

Lifting, lowering, moving, adjusting

Product Range

The LIFT-O-MAT gas spring is availableas follows:

• Standard range

• A choice can be made between thestandard versions with eyelet endfittings or ball sockets

• Further connection variants availableon request

• Standard features are the provenNislide piston rod for extended life,with high resistance to corrosionand an environmentally friendly design

• Special gas spring types available withprotective tube

• Roll-closed as standard at thepressure tube end to ensure optimalseal without weld seams and highresistance to corrosion

• With different sets of seals, dependingupon the application

Special seal-guide system

Pressure tube with filling medium

Oil

Piston rod

Piston system

Pressure tube connection

D 2

D 1

Piston rod connection

6 15 50 - 400 150 1,3 50

8 19 100 - 800 250 1,35 60

10 22 150 - 1150 400 1,4 80

10 49 150 - 950 566 1,04 80

14 28 500 - 2100 500 1,5 80

20 42 1000 - 5200 500 1,45 150

Extension forceD1 D2 F1 [N] Max. stroke x FR max.

[mm] [mm] min. max. [mm] ( ) [N]

The gas spring can be designed with anapproximately linear, progressive ordegressive spring rate curve, to match theparticular need.The characteristic curve of the springdescribes the progression of the force ofthe gas spring over the stroke, from theextended to the compressed state andvice versa.If the spring rate is flat and progresses ina practically linear manner, the force of thegas spring consequently rises only slightlyover the entire spring travel.Spring rate: X = F2 : F1

The force diagram on the left shows theline of the extension and compressionforce with a flat spring rate. The differencebetween the two lines is the result of thesystem friction produced during com-pression and extension.The measuring points F1 and F4 are eachlocated 5 mm before the fully extendedand compressed stroke. The measure-ments were conducted at a temperatureof 20° C.You can get details regarding tolerancesfrom the technical drawings or ondemand.

®

Druckrohranschlußwählbar nach Typenprogramm

Druckrohr mit Füllmedium

Trennkolben

Geschwindigkeits-und dämpfungs-regulierendesVentilsystem


Kolbenstangen-anschluß mit Gewinde

D 2

D 1

• With hydraulic damping control as aresult of patented labyrinth pistons(damping during extension and/orcompression of the piston rod)

• With dynamic damping system forachieving the desired degree ofdamping over the entire stroke of thegas spring

Characteristic curve of a gas spring

5 5

FR

compression force

pneumatic hydraulic

extension force

damping range

N[ ]force

friction

F1

F2

stroke [mm]

F O R C E D I A G R A M

F4

F3

extended compressed

Variants• LIFT-O-MAT gas spring with mechani-

cal external or internal limit lock as anadditional safeguard to cope withvarying weights, e.g. snow loads orwind gusts

• HYDRO-LIFT gas spring for steplesspositioning at any desired point

• Gas spring with increased friction(Reib-LIFT-O-MAT) for steplesspositioning at any desired point

• ELECTRO-LIFT gas spring with theadditional benefit of transmitting anelectric current of up to 25A/12V orwith a switch function, e.g. forilluminating a stowage area in acamper

Variable positioning, rigid or springblockingOperating principle

This version operates on the sameprinciple as the LIFT-O-MAT. In addition,the gas spring features an integratedvalve and can thus be blocked in anydesired position.

The piston is sealed at the pressuretube and separates two gas spaces.

When the valve is closed, the gas springis fixed which enables it to be blockedin any desired position. If the releaseplunger is operated, the valve is openedand the gas spring unit can be movedinto any desired position.

The extension rate and the dampingcan be varied accordingly by the choiceof nozzle in the piston.

Pressure tube connection selec-table according to product range

Pressure cylinder with filling medium

Separating piston

Valve system regulating speed and dampening

Special seal and guide system

Threadedpiston rod connection

D 2

D 1

Variants

• BLOC-O-LIFT gas spring with resilientblocking in the extension or compres-sion direction. If the piston is movedover the range of stroke in the gas, aresilient blocking effect is achieved asgas is compressible

• BLOC-O-LIFT gas spring with rigid-blocking in the extension or compres-sion direction. If the piston is movedover the range of stroke in the oil, arigid blocking effect is achieved asoil is not compressible

In the case of the position-independentrigid blocking variant, the gas and oilspaces are separated by a separatingpiston and rigid blocking is possible inthe extension or compression direction,depending on the design.

Product Range

The BLOC-O-LIFT gas spring is availableboth in a resilient and also a rlgid block-ing version as follows:

• Standard range of products

• Special gas spring types are availablewith an 8 mm piston rod and 22 mmpressure tube diameter

• Fitted as standard with thread oreyelet end fittings


8 28 200 - 1000 100 1,1 60

10 28 200 - 1500 250 1,2 80



Accessories:

Release head with lever and handle,buffer and nuts, release head withbowden cable and operating unit

• With special sealing system suitablefor continuous operation

• With special sealing system for anydesired installation position

• With short release travel of 1 mminstead of the standard 2,5 mm

• With reversed valve operation (valvecloses when released)

• Without extension force (HYDRO-BLOC)

®

Membran

Bodenventil-einheit

D 2

D 1

AnschlußteilGelenkauge

Füllmedium Gas

Bodenventileinheit

Dämpfkolben mitVentilsystem

Druckrohr mitFüllmedium Öl



Hydraulic dampening of vibrations

Product Range

The damper is available as follows:

• STAB-O-SHOC as a position-depend-ent damper without extension force withdamping forces in one direction or in theextension and compression direction

• STAB-O-SHOC as a position-dependentdamper with extension force, withdamping forces in one direction or in theextension and compression direction

• STAB-O-SHOC as a position-independ-ent damper without extension force withdamping forces in one direction or in theextension and compression direction


• Special types of dampers with higherdamping forces available on request

• Fitted as standard with eyelets atboth ends


VariantsThe damping force characteristic maybe designed to be linear, progressiveor degressive. The damper may be usedup to a temperature of 100° C. Specialdesigns for temperatures in excess of100° C are possible.

The damper is a hydraulic dampingelement and consists of a pressure tubewith a connection fitting, a piston rodwith piston system and a piston rodconnection fitting.The piston rod is mounted in a special

seal-guide system in the pressure tube.The piston rod in the pressure tubefeatures damping piston and the relatedvalve system.The movement of the piston displacesthe filling medium (oil), which is pressed

through the valve system and thusproduces a damping force.Dampers are needed to influence thenature of movements and vibrations,Dampers are designed to optimallymatch the particular application.

Connection parthinged eye

Filling medium, gas

Bottom valve unit

Damping piston with valve system

Pressure tube filled with oil


Seal-guide unit

D1 [mm] D2 [mm] Max. Damping force [N] Max. stroke

6 15,6 1000 80

8 24 5000 180

10 24 5000 180

10 29 7000 200

8 38 1600 250

11 50 2500 300

14 64 3000 450

Diaphragm

Bottom valve unit

F = 1 = 330 N30 · 400200 · 2 * 11

F = 1 [ ]NG · Lb · n * 11

AB -

+ 2

b

P

G

L

STABILUS GmbH Wallersheimer Weg 100D- 56070 Koblenz

Tel. 02 61-89 00-0Fax 02 61-89 00-2 04

Deutschland Italia USA México AustraliaSTABILUS 92 Country Line RoadUSA-ColmarPA 18915-9607 Tel. 2 15-8 22-19 82Fax 2 15-8 22-70 57 STABILUS 1201 Tulip DriveUSA-GastoniaN.C. 28052

STABILUS S.A. de C.V. Industria Metalurgica 1010Parque Industrial Ramos ArizpeCP 25900 Ramos Arizpe, Coahuila Tel. 84-11 07 07Fax 84-11 07 06

EspañaSTABILUSDivisión de Sachs Ibérica, S.A.Barrio de La Cruz, núm. 128E-48196 Lezama (Vizcaya)

Tel. 94-4 55 50 50Fax 94-4 55 60 23

STABILUS Pty. Ltd.23 Valley StreetSouth Oakleigh Victoria 3167 Tel. 03-95 62-74 90Fax 03-95 62-96 32

STABILUS S.r.I.Via Nazionale, 209I-10069 Villar Perosa

Tel. 01 21-31 67 11Fax 01 21-31 56 37

United KingdomSTABILUS Ltd. Beaumont RoadGB-Banbury Oxon. OX16 7QZ

Tel. 0 12 95-27 47 77Fax 0 12 95-26 57 15

Sta

nd 1

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STABILUS Quality

Quality ranks high at STABILUS and isthe basis for our leading position in themarket.The high quality standard for STABILUSproducts which the market demandswas the impetus for establishing aQuality Assurance System severaldecades ago which constantly inte-grates growing requirements and newknowledge.The product philosophy of ongoingfurther development which STABILUS

pursues is aimed at achieving zerofaults. The STABILUS Quality AssuranceSystem controls the quality-assuringelements from the product idea throughto customer implementation on the basisof “Total Quality Management” (TQM).

The basis for this is our certification inconformity with IS0 9001. Internal as wellas specific customer requirements arefully considered.Use is made in this connection of specialquality measuring instruments such as“Design of Experiments”, FMEA, SPC.


Please request detailed information.

To help you choose the rightLIFT-O-MAT gas spring for yourapplication you need to know:

• the stroke A [mm]• the extended length B [mm]• the extension force F1 [N]• and the type of connection

Determining the extension force F1 [N]

G = Weight of flap in kgL = Distance of centre of gravity to

pivot point in mmb = Effective lever arm of gas spring

in mm, flap openn = Number of gas springs11= Conversion factor kg→N

+ safety marginP = Flap attachment approx. 2/3 L

Example:G = 30 kg, L = 400 mm, b = 200 mm, n = 2

Installation instructions

• Install without twisting

• Pivot only at the connections provided

• Avoid lateral forces

• It is recommended to install the unitwith the piston rod facing down, ifpossible

• Protect piston rod from dirt, paint anddamage

• Do not perform any metal-cutting workon the unit

Disposal in conformity with SN 03.10-00/13

Subject to modification.

A company of Mannesmann Sachs

By means of production self inspectionsbased on statistical aspects as well asparameter control on automatic productionfacilities, a range of product accompanyingtests and inspections are conducted fromthe Incoming Goods Department throughto Shipping. These measures assure to-specification manufacture of all STABILUSproducts. The quality inspection seal oneach package is verification that theproduct fully complies with specification.Numerous international quality awards areconfirmation of the efficiency and thesuccess of STABILUS quality.

Calculating installation of a LIFT-O-MAT gas spring

Convenient Operation and Safety in Automotive Engineering with Gas Springs and Dampers


has been a supplier to the internationalvehicle, aircraft, shipbuilding, mechanicalengineering, furniture, swivel chair andbuilding industries for decades now, withever increasing success.

Each STABILUS gas spring embodiesthe experience of more than 750 millionunits produced.

Pioneering achievements

STABILUS is a member of the SachsGroup within the MANNESMANN Con-cern, with over 60 years experience inthe manufacture of hydropneumaticequipment. In addition to having producedhydraulic dampers over several decades,STABILUS presented the world’s firststandard production gas spring in 1962.

STABILUS sees itself as a problemsolver for the most varied of applica-tions and, since the start of production,has attributed the greatest significanceto perfect operation, outstanding safetyand excellent quality.

STABILUS, with its production facilitiesin Germany, the United Kingdom, Spain,Italy, the USA, Mexico and Australia,

Operating principle of a gasspring

The gas spring is a hydropneumaticadjusting element, consisting of apressure tube with a connecting fitting,a piston rod with piston system and apiston rod connection fitting.

A special seal and guide system sealsoff the interior to atmosphere. The gasspring is filled with compressed nitro-gen. The filling pressure acts on thecross-sectional area of the piston rodand produces an extension force, whichcan be freely selected within physicallimits. If the extension force of the gasspring is higher than the force of thecounterweight, the piston rod extends.If the extension force is less, it con-tracts.

The extension rate is determined by theoverflow cross-section in the pistonsystem and pressure tube, respectively.

The interior of the gas spring is fillednot only with nitrogen, but also with aprecisely defined quantity of oil which,on the one hand, ensures properlubrication of the piston and the sealguide system and, on the other,provides for proper dampening of thepiston in the end position.

The gas spring is completely mainte-nance-free in operation. In the standardversion, the gas spring is designed forat least 50.000 operations.

Gas springs and dampers forthe automobile industry

STABILUS gas springs and dampershave been used for decades in everincreasing numbers in general automo-bile engineering. They offer the user ahigh level of operating convenience andsecurity and are characterised by theircompact design and thus their praticalintegration in vehicle design. STABILUSgas springs and dampers are used in awide range of applications in general

vehicle engineering, examples beingsuperstructures, bodies and vehicleseats. In addition, STABILUS productsare used increasingly in agriculturalvehicles, in special bodies, in railwayvehicles and in the general transportsector.

STABILUS is a major supplier to theinternational automobile industry andmany millions of STABILUS productsare fitted each year to passenger carsand commercial vehicles.

STABILUS gas springs open, adjustand close hoods, covers, hatches,doors and casings in a controlled anddamped movement and permit thestepless adjustment of seats.STABILUS dampers find application insteering systems, engines, gearshiftand throttle linkages, V-belts, overrunbrakes and driver seats.The applications of STABILUS productsin automotive engineering are as variedas your ideas and the answer to yourproblems.

®


Druckrohrmit Füllmedium

Öl

Kolbenstange

Kolbenpaket

Druckrohr-anschluß

D 2

D 1


Lifting, lowering, moving, adjusting

Product Range

The LIFT-O-MAT gas spring is availableas follows:

• Standard range

• A choice can be made between thestandard versions with eyelet endfittings or ball sockets


• Standard features are the provenNislide piston rod for extended life,with high resistance to corrosionand an environmentally friendly design

• Special gas spring types available withprotective tube

• Roll-closed as standard at thepressure tube end to ensure optimalseal without weld seams and highresistance to corrosion

• With different sets of seals, dependingupon the application

Special seal-guide system

Pressure tube with filling medium

Oil

Piston rod

Piston system

Pressure tube connection

D 2

D 1


6 15 50 - 400 150 1,3 50

8 19 100 - 800 250 1,35 60

10 22 150 - 1150 400 1,4 80

10 49 150 - 950 566 1,04 80

14 28 500 - 2100 500 1,5 80

20 42 1000 - 5200 500 1,45 150



The gas spring can be designed with anapproximately linear, progressive ordegressive spring rate curve, to match theparticular need.The characteristic curve of the springdescribes the progression of the force ofthe gas spring over the stroke, from theextended to the compressed state andvice versa.If the spring rate is flat and progresses ina practically linear manner, the force of thegas spring consequently rises only slightlyover the entire spring travel.Spring rate: X = F2 : F1

The force diagram on the left shows theline of the extension and compressionforce with a flat spring rate. The differencebetween the two lines is the result of thesystem friction produced during com-pression and extension.The measuring points F1 and F4 are eachlocated 5 mm before the fully extendedand compressed stroke. The measure-ments were conducted at a temperatureof 20° C.You can get details regarding tolerancesfrom the technical drawings or ondemand.

®

Druckrohranschlußwählbar nach Typenprogramm

Druckrohr mit Füllmedium

Trennkolben

Geschwindigkeits-und dämpfungs-regulierendesVentilsystem


Kolbenstangen-anschluß mit Gewinde

D 2

D 1

• With hydraulic damping control as aresult of patented labyrinth pistons(damping during extension and/orcompression of the piston rod)

• With dynamic damping system forachieving the desired degree ofdamping over the entire stroke of thegas spring

Characteristic curve of a gas spring

5 5

FR

compression force

pneumatic hydraulic

extension force

damping range

N[ ]force

friction

F1

F2

stroke [mm]

F O R C E D I A G R A M

F4

F3

extended compressed

Variants• LIFT-O-MAT gas spring with mechani-

cal external or internal limit lock as anadditional safeguard to cope withvarying weights, e.g. snow loads orwind gusts

• HYDRO-LIFT gas spring for steplesspositioning at any desired point

• Gas spring with increased friction(Reib-LIFT-O-MAT) for steplesspositioning at any desired point

• ELECTRO-LIFT gas spring with theadditional benefit of transmitting anelectric current of up to 25A/12V orwith a switch function, e.g. forilluminating a stowage area in acamper

Variable positioning, rigid or springblockingOperating principle

This version operates on the sameprinciple as the LIFT-O-MAT. In addition,the gas spring features an integratedvalve and can thus be blocked in anydesired position.

The piston is sealed at the pressuretube and separates two gas spaces.

When the valve is closed, the gas springis fixed which enables it to be blockedin any desired position. If the releaseplunger is operated, the valve is openedand the gas spring unit can be movedinto any desired position.

The extension rate and the dampingcan be varied accordingly by the choiceof nozzle in the piston.

Pressure tube connection selec-table according to product range

Pressure cylinder with filling medium

Separating piston

Valve system regulating speed and dampening

Special seal and guide system

Threadedpiston rod connection

D 2

D 1

Variants

• BLOC-O-LIFT gas spring with resilientblocking in the extension or compres-sion direction. If the piston is movedover the range of stroke in the gas, aresilient blocking effect is achieved asgas is compressible

• BLOC-O-LIFT gas spring with rigid-blocking in the extension or compres-sion direction. If the piston is movedover the range of stroke in the oil, arigid blocking effect is achieved asoil is not compressible

In the case of the position-independentrigid blocking variant, the gas and oilspaces are separated by a separatingpiston and rigid blocking is possible inthe extension or compression direction,depending on the design.

Product Range

The BLOC-O-LIFT gas spring is availableboth in a resilient and also a rlgid block-ing version as follows:


• Special gas spring types are availablewith an 8 mm piston rod and 22 mmpressure tube diameter

• Fitted as standard with thread oreyelet end fittings


8 28 200 - 1000 100 1,1 60

10 28 200 - 1500 250 1,2 80



Accessories:

Release head with lever and handle,buffer and nuts, release head withbowden cable and operating unit

• With special sealing system suitablefor continuous operation

• With special sealing system for anydesired installation position

• With short release travel of 1 mminstead of the standard 2,5 mm

• With reversed valve operation (valvecloses when released)

• Without extension force (HYDRO-BLOC)

®

Membran

Bodenventil-einheit

D 2

D 1

AnschlußteilGelenkauge

Füllmedium Gas

Bodenventileinheit

Dämpfkolben mitVentilsystem

Druckrohr mitFüllmedium Öl



Hydraulic dampening of vibrations

Product Range

The damper is available as follows:

• STAB-O-SHOC as a position-depend-ent damper without extension force withdamping forces in one direction or in theextension and compression direction

• STAB-O-SHOC as a position-dependentdamper with extension force, withdamping forces in one direction or in theextension and compression direction

• STAB-O-SHOC as a position-independ-ent damper without extension force withdamping forces in one direction or in theextension and compression direction


• Special types of dampers with higherdamping forces available on request

• Fitted as standard with eyelets atboth ends


VariantsThe damping force characteristic maybe designed to be linear, progressiveor degressive. The damper may be usedup to a temperature of 100° C. Specialdesigns for temperatures in excess of100° C are possible.

The damper is a hydraulic dampingelement and consists of a pressure tubewith a connection fitting, a piston rodwith piston system and a piston rodconnection fitting.The piston rod is mounted in a special

seal-guide system in the pressure tube.The piston rod in the pressure tubefeatures damping piston and the relatedvalve system.The movement of the piston displacesthe filling medium (oil), which is pressed

through the valve system and thusproduces a damping force.Dampers are needed to influence thenature of movements and vibrations,Dampers are designed to optimallymatch the particular application.

Connection parthinged eye

Filling medium, gas

Bottom valve unit

Damping piston with valve system

Pressure tube filled with oil


Seal-guide unit

D1 [mm] D2 [mm] Max. Damping force [N] Max. stroke

6 15,6 1000 80

8 24 5000 180

10 24 5000 180

10 29 7000 200

8 38 1600 250

11 50 2500 300

14 64 3000 450

Diaphragm

Bottom valve unit

F = 1 = 330 N30 · 400200 · 2 * 11

F = 1 [ ]NG · Lb · n * 11

AB -

+ 2

b

P

G

L

STABILUS GmbH Wallersheimer Weg 100D- 56070 Koblenz

Tel. 02 61-89 00-0Fax 02 61-89 00-2 04

Deutschland Italia USA México AustraliaSTABILUS 92 Country Line RoadUSA-ColmarPA 18915-9607 Tel. 2 15-8 22-19 82Fax 2 15-8 22-70 57 STABILUS 1201 Tulip DriveUSA-GastoniaN.C. 28052

STABILUS S.A. de C.V. Industria Metalurgica 1010Parque Industrial Ramos ArizpeCP 25900 Ramos Arizpe, Coahuila Tel. 84-11 07 07Fax 84-11 07 06

EspañaSTABILUSDivisión de Sachs Ibérica, S.A.Barrio de La Cruz, núm. 128E-48196 Lezama (Vizcaya)

Tel. 94-4 55 50 50Fax 94-4 55 60 23

STABILUS Pty. Ltd.23 Valley StreetSouth Oakleigh Victoria 3167 Tel. 03-95 62-74 90Fax 03-95 62-96 32

STABILUS S.r.I.Via Nazionale, 209I-10069 Villar Perosa

Tel. 01 21-31 67 11Fax 01 21-31 56 37

United KingdomSTABILUS Ltd. Beaumont RoadGB-Banbury Oxon. OX16 7QZ

Tel. 0 12 95-27 47 77Fax 0 12 95-26 57 15

Sta

nd 1

1/96

/1

STABILUS Quality

Quality ranks high at STABILUS and isthe basis for our leading position in themarket.The high quality standard for STABILUSproducts which the market demandswas the impetus for establishing aQuality Assurance System severaldecades ago which constantly inte-grates growing requirements and newknowledge.The product philosophy of ongoingfurther development which STABILUS

pursues is aimed at achieving zerofaults. The STABILUS Quality AssuranceSystem controls the quality-assuringelements from the product idea throughto customer implementation on the basisof “Total Quality Management” (TQM).

The basis for this is our certification inconformity with IS0 9001. Internal as wellas specific customer requirements arefully considered.Use is made in this connection of specialquality measuring instruments such as“Design of Experiments”, FMEA, SPC.


Please request detailed information.

To help you choose the rightLIFT-O-MAT gas spring for yourapplication you need to know:

• the stroke A [mm]• the extended length B [mm]• the extension force F1 [N]• and the type of connection

Determining the extension force F1 [N]

G = Weight of flap in kgL = Distance of centre of gravity to

pivot point in mmb = Effective lever arm of gas spring

in mm, flap openn = Number of gas springs11= Conversion factor kg→N

+ safety marginP = Flap attachment approx. 2/3 L

Example:G = 30 kg, L = 400 mm, b = 200 mm, n = 2

Installation instructions

• Install without twisting

• Pivot only at the connections provided

• Avoid lateral forces

• It is recommended to install the unitwith the piston rod facing down, ifpossible

• Protect piston rod from dirt, paint anddamage

• Do not perform any metal-cutting workon the unit

Disposal in conformity with SN 03.10-00/13

Subject to modification.


By means of production self inspectionsbased on statistical aspects as well asparameter control on automatic productionfacilities, a range of product accompanyingtests and inspections are conducted fromthe Incoming Goods Department throughto Shipping. These measures assure to-specification manufacture of all STABILUSproducts. The quality inspection seal oneach package is verification that theproduct fully complies with specification.Numerous international quality awards areconfirmation of the efficiency and thesuccess of STABILUS quality.

Calculating installation of a LIFT-O-MAT gas spring

Gas Springs and Dampersfor Automotive Applications


Rear seat adjustment

Centre consoleTelephone console

STABILUS qualityQuality ranks high at STABILUS and is the basis for our leading position in the market. The high quality standard for STABILUS products which the market demands was the impetus for establishing a Quality Assurance System several decades ago which constantly integrates growing requirements and new knowledge. The product philosophy of continuous development which STABILUS pursues is aimed at achieving zero faults. The STABILUS Quality Assurance System controls the quality-assuring elements from the product idea through to customer implementation on the basis of ”Total Quality Management“ (TQM).

The basis for this is our certification in conformity with ISO 9001. Internal as well as specific customer

requirements are fully considered. Use is made in this connection of special quality measuring instruments such as ”Design of Experiments“, FMEA and SPC.

STABILUS has achieved a number of quality awards from the international automotive industry.

Engine vibration damping

Gas Springs and Dampers for Cars

Gas Springs and Dampers for Commercial Vehicles

Gas Springs and Dampers for Cars

Pioneering achievementsSince the foundation of the company in Koblenz in 1934, STABILUS has been producing hydraulic damping elements for the automotive industry. In the fifties, STABILUS offered the first hydraulic damper for horizontal installation. Since then, many millions have been used particularly for steering damping.

ln 1962, STABILUS presented the world’s first standard production gas spring. This hydropneumatic adjusting element gradually replaced mechanical systems. Today it is being increasingly used by the automotive industry in further applications additionally to the existing, such as hatchbacks, bonnets, trunk lids, and seat adjustments.

Established know-how and solid quality have made STABILUS the world leader for gas springs. Product innovations in the field of hydraulic dampers and gas springs have started their triumphal campaign from Koblenz.

There are STABILUS production facilities in Germany, the United Kingdom, Spain, Italy, the U.S.A., Australia and Mexico.

Development supplierSTABILUS has been supplying the international automotive industry for decades and is a recognised development supplier. Throughout the world STABILUS employees perform creative innovative work to further enhance our products.

The multiplicity of technical solutions guarantees an optimal solution to our customers' requirements. STABILUS gas springs and dampers have become the international standard. STABILUS offers its customers extensive service and development support, ranging from computer-supported analysis to on-site fine-tuning on the vehicle by mobile workshops.

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Gas Springs and Dampers for Commercial Vehicles

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Gullwing doors

The LIFT-O-MAT® raises weights and offers a weight compensation. If the extension force of the gas spring is higher than the force of the counter-weight, the piston rod extends, e.g. Iifting the hatchback. If the extension force is smaller, it compresses.

Glove compartment

Injection pump damping

Convertible topConvertible top adjustment

Folding headlights Roll bar

HatchbackHeight adjustment

Seat back adjustment

Bonnet

Seat adjustment Trunk lid

Steering column adjustment Window adjustment

Radiator mascot (disappearing)

Steering damping Belt-tension damping

Lifting, lowering, moving, adjusting.

Storage tray for driverStorage of hand luggageGlove compartmentBattery boxSliding folding topHatchback

Engine bonnetSteeringHoodBonnetStreamline deflectorSleeper berth

EngineInjection control linkageManual transmissionDriver’s seatDriver’s cab

Luggage lidMaintenance lidSeatsRoof lidSteering columnRadio lid

Variable positioning in many applications.

e.g. Driver’s seat back, steering column.

Vibration dampers for the steering engine and other applications.

Variable positioning, rigid or spring blocking.

Hydraulic dampening of vibrations.

Applications in commercial vehicles

Folding table

Sta

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8/95

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LIFT - O - MAT

LIFT - O - MAT

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Please request more detailed information.

STABILUS GmbHWallersheimer Weg 100D-56070 KoblenzP.O. Box 2029, D-56020 KoblenzPh. (0261) 8900-0Fax (0261) 8900-479Telex stabk 862 495


Design of a gas spring

Submission to STABILUS of specifica-

tions, drawings, geometri-cal data by the customer.

Check of data by using the installation proposal programme.

Determination of the parameters for the design of the gas spring.

Design of the gas spring.Counter-check of installation

proposals.Confirmation of data.

Fine-tuning of the gas spring on vehicle prototypes by using STABILUS’s

mobile workshop.

Release of the gas spring and finalization of the design.

Series introduction of the gas spring at STABILUS. MCS, FMEA, SPC and

TQM to ensure volume production.

Fulfilment of the customer’s expectations through performance and quality.


Gas springs in swivel chairsstepless and ergonomic adjustment

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Stepless adjustment of seat angle and backrestof swivel chairs

Pressure cylinderwith filling medium

Threaded pistonrod connection

Valve systemregulating speedand dampening

Special seal andguide assembly

Pressure tube con-nection selectableaccording to pro-duct range

Separatingpiston

Product Range

The BLOC-O-LIFT gas spring isavailable both with resilient and alsowith rigid blocking as follows:

• With pressure tube diameter 22 and 28 mm• In different lengths, especially also in different strokes (10 - 50 mm)• With different end-fittings• With special sealing systems, suitable for continuous release• With special sealing systems for any desired installation position• With short release travel of 1 mm instead of standard 2,5 mm• With pressure relief valve• With reversed valve operation (valve closes during release)• Without extension force (HYDRO-BLOC)

Accessories:Release head with lever and handle,buffers and nuts, release head withbowden cable and operating unit

Variants

Depending on requirements, the gasspring can be designed with rigid orresilient blocking.

Resilient blocking is achieved if thepiston moves over the lift range in thegas as the gas is compressible. Rigidblocking is achieved if the pistonmoves over its lift range in the oil as theoil is not compressible.

In the case of rigid blocking, the gasand oil spaces are separated by aseparating piston and, depending ondesign, rigid blocking is possible in theextension or compression direction.

Swivel chair engineeringfrom STABlLUS

Until the introduction of the gas springin series production, swivel chairs wereadjusted by means of spindles or detentmechanisms. The gas spring has per-formed this function to an ever increasingextent since the sixties as a practicaland compactly dimensioned adjustingelement. Many hundreds of swivel chairmanufacturers throughout the worldhave been placing their faith fordecades now in STABILUS gas springs.

Swivel chair manufacturers and practi-tioners of occupational medicine rightlyregard STABILUS as the pioneer in thedevelopment and manufacture of gassprings for ergonomic sitting in theswivel chair sector. The gas springenables a swivel chair to be adjustedsteplessly in height in the most com-fortable manner. A single operation ofthe adjusting lever, and the swivel chairuser glides downwards in a gentlycontrolled movement. If the chair is notoccupied, the seat glides smoothlyupwards. A pleasant deep springingexists in the working position. Thesame principle is applied for adjustingthe seat angle and backrest. The gassprings can also be designed on requestwith a fixed blocking mechanism.

Operating principle

The STAB-O-MAT/STAB-O-BLOC- andBLOC-O-LIFT - gas springs arehydropneumatic adjusting elementswhich can be set to any desired heightand feature a self contained gas/oilsystem as an energy store. The springforce is produced by a compressednitrogen filling.

A special sealing system betweenpiston rod and tube wall seals off theinner space to atmosphere. The fillingpressure acts on the cross-sectionalarea of the piston rod and producesthe extension force F1, which can befreely selected within the physical limits.

Pioneeringachievements

STABILUS, a member of the SACHSGroup within the MANNESMANNConcern, with over 60 years experiencein the construction of hydropneumaticequipment, presented to the swivelchair industry the world’s first standardproduction gas spring in 1962.

STABILUS sees itself as a problemsolver for the most varied demands andhas attached the greatest significanceto perfect operation and safety sincethe start of production in 1962.STABILUS gas springs comply withDIN standards, have the authorisedsafety seal of test institutes (such asthe German Technical InspectionAuthority - TÜV - and regional industrialinspection boards - LGA), and are inconformity with leading Europeanstandards.

STABILUS, with its production facilitiesin Germany, United Kingdom, Spain,Italy, USA, Mexico, Brazil and Australia,have been an increasingly importantsupplier for several decades now to theswivel chair, furniture and buildingindustries. Each STABILUS gas springembodies the experience of more than750.000.000 units produced.

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Stepless height adjustment of swivel chairsVariants

The STAB-O-MAT and STAB-O-BLOCgas springs are designed in accordancewith the same operating principle. Thedifference is in the arrangement of anadditional supporting tube around theSTAB-O-BLOC gas spring. Whereasthe STAB-O-MAT gas spring with itssupporting tube performs the guidingfunction in the column, the gas spring ofthe STAB-O-BLOC is surrounded by anadditional outer supporting tube whichabsorbs the bending stress. The gasspring is flanged into this supportingtube or alternatively screwed in topermit easy subsequent replacement.Both gas spring variants feature anouter tube with a chromium-platedsurface which is guided by a bushwithin a support tube.

Product Range

STAB-O-MAT and STAB-O-BLOC areoffered as follows:

• In the diameters 28 and 30 mm• In various lengths, offering a range of adjustment stroke lengths (50 - 300 mm)• In various taper dimensions for mounting into the seat carrier• As complete columns with various diameters of upright tube and taper dimensions for swivel chair bases• As telescopic column for over proportional adjustment range• With various surface finishes of upright tube• With additional mechanical deep springing systems, also in lowest seat position

• With adjustable release pins• STAB-O-MAT with short release travel of 1 mm instead of standard 2,5 m• STAB-O-BLOC with standard release travel of 1,7 mm• STAB-O-MAT with reduced release force• With cardan guide bushes as sliding element not susceptible to twisting

Accessories:Plastic bushes, cardan guide bushesbearing parts, rubber buffers, simplerelease mechanisms and bowdencable release

Special Equipment

with additional supporting tube

Cardan guidebush

Adjustable pin

Additional deepspringing

Additionalsupporting tube

Piston rod with mi-nimal peak-to-valleyheight and wear-resistant surface


Valve systemregulating speedand dampening

Connection toseat carrier selec-table according toproduct range

Piston rod with mi-nimal peak-to-valleyheight and wear-resistant surface


Valve system re-gulating speed anddampening

Connection to seatcarrier selectableaccording to productrange

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Stepless height adjustment of swivel chairs

• Various range of products

• Technical assistance for applications

• Suggestions and solutions for difficult applications

• Quality with ISO 9000

• Security with DIN 4550 and 4551

• Tested by LGA, TÜV, ANSI, BIFMA

• Excellent service

• High quality guarantee

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Stepless adjustment of seat angle and backrestof swivel chairs

• As the pioneers in gas spring technology,

STABILUS presented the first standard

production unit for the height adjustment

of swivel chairs in 1962

• For more than 30 years

quality and security

• More than 450 swivel chair manufacturers

in the world have confidence in STABILUS

• Each quality product of STABILUS contains

the experience of more than 750.000.000

produced gas springs for different applications

The drop test.Test of complete swivel chairs inconformity with LGA Specifi-cation; DIN 4551.

The alternate bending test.Test of complete swivel chair inconformity with DIN 4551.

The misuse test (drop test ll).Test of complete swivel chairs

in conformity withANSI X5.1-1985/BIFMA.

The backrest test.Test of BLOC-O-LlFT

(for seat angle and backrest) orswivel chairs in installation position.

STABlLUS-QualityQuality ranks high at STABILUS and is thebasis for our leading position in the market.

The high quality standard for STABILUSproducts which the market demandswas the impetus for establishing aQuality Assurance System several de-cades ago which constantly integratesgrowing requirements and new know-ledge.

The product philosophy of ongoingfurther development which STABILUSpursues is aimed at achieving zero faults.

The STABILUS Quality AssuranceSystem controls the quality-assuringelements of the product idea through tocustomer implementation on the basisof ”Total Quality Management“ (TQM).This is founded on international qualitystandards (e. g. ISO 9000). The systemalso takes into account internal as wellas specific customer demands.Use is made of recognised qualitymeasuring instruments such as „Designof Experiments“, FMEA, SPC.

By means of production self-inspectionsbased on statistical aspects as well asparameter control on automatic pro-duction facilities, a range of product-accompanying tests and inspections areconducted from the Incoming GoodsDepartment through to Shipping. Thesemeasures assure to-specification manu-facture of all STABILUS products. Thequality inspection seal on each packageis verification that the product fullycomplies with specification.Numerous international quality awardsare confirmation of the efficiency and thesuccess of STABILUS quality.

The STABILUS Test Centre

The STABILUS in-house Test Centreconducts the tests laid down by inde-pendent institutes (e.g. TÜV, LGA, FIRA,ANSI/BIFMA) as well as additional testsin conformity with STABILUS standards.The principal tests are:

STABILUS1201 Tulip DriveGastonia, NC 25602Tel. 7 04-8 65-74 44Fax 7 04-8 65-77 81


Please request detailed information


gas springs and dampers for industrial applications · 2013-12-13 · gas springs and dampers for...

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