DE20307898U1 - Spring based on a cylindrical damping element made of a material derived from polyisocyanate polyaddition products has a circumferential base section and a head section with an end shaped as a convex lens - Google Patents
Spring based on a cylindrical damping element made of a material derived from polyisocyanate polyaddition products has a circumferential base section and a head section with an end shaped as a convex lensInfo
- Publication number
- DE20307898U1 DE20307898U1 DE20307898U DE20307898U DE20307898U1 DE 20307898 U1 DE20307898 U1 DE 20307898U1 DE 20307898 U DE20307898 U DE 20307898U DE 20307898 U DE20307898 U DE 20307898U DE 20307898 U1 DE20307898 U1 DE 20307898U1
- Authority
- DE
- Germany
- Prior art keywords
- spring element
- spring
- convex lens
- damping element
- polyisocyanate polyaddition
- 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.)
- Expired - Lifetime
Links
- 229920001228 polyisocyanate Polymers 0.000 title claims abstract description 9
- 239000005056 polyisocyanate Substances 0.000 title claims abstract description 9
- 238000013016 damping Methods 0.000 title claims abstract description 8
- 239000000463 material Substances 0.000 title abstract description 3
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 6
- 230000001413 cellular effect Effects 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 16
- 239000010959 steel Substances 0.000 description 16
- 229920001971 elastomer Polymers 0.000 description 6
- 239000000806 elastomer Substances 0.000 description 6
- 244000309464 bull Species 0.000 description 4
- 239000012948 isocyanate Substances 0.000 description 4
- 150000002513 isocyanates Chemical class 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- -1 polyoxymethylene Polymers 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 239000004952 Polyamide Substances 0.000 description 2
- 229920002396 Polyurea Polymers 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 230000000750 progressive effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229930040373 Paraformaldehyde Natural products 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea group Chemical group NC(=O)N XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/371—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by inserts or auxiliary extension or exterior elements, e.g. for rigidification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G7/00—Pivoted suspension arms; Accessories thereof
- B60G7/04—Buffer means for limiting movement of arms
-
- 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
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/3605—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by their material
-
- 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
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/373—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by having a particular shape
-
- 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
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/42—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing
- F16F1/44—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by the mode of stressing loaded mainly in compression
-
- 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
- B60G2202/14—Plastic spring, e.g. rubber
- B60G2202/143—Plastic spring, e.g. rubber subjected to compression
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/10—Mounting of suspension elements
- B60G2204/12—Mounting of springs or dampers
- B60G2204/125—Mounting of rubber type springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
- B60G2204/45—Stops limiting travel
- B60G2204/4502—Stops limiting travel using resilient buffer
-
- 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
- F16F2230/00—Purpose; Design features
- F16F2230/0052—Physically guiding or influencing
- F16F2230/007—Physically guiding or influencing with, or used as an end stop or buffer; Limiting excessive axial separation
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Springs (AREA)
Abstract
Description
Zusatzfeder
BeschreibungAdditional spring
Description
Die Erfindung betrifft Federelement basierend auf einem zylindrischen Dämpfungselement (i) auf der Basis von Polyisocyanat-Polyadditionsprodukten, bevorzugt auf der Basis von zelligen Polyurethanelastomeren, die ggf. Polyhamstoffstrukturen enthalten können, besonders bevorzugt auf der Basis von zelligen Polyurethanelastomeren bevorzugt mit einer Dichte nach DIN 53 420 von 200 bis 1100, bevorzugt 300 bis 800 kg/m3, einer Zugfestigkeit nach DIN 53571 von £ 2, bevorzugt 2 bis 8 N/mm2, einer Dehnung nach DIN 53571 von £ 300, bevorzugt 300 bis 700 % und einer Weiterreißfestigkeit nach DIN 53515 von ä 8, bevorzugt 8 bis 25 N/mm, wobei die Federelemente einen umlaufenden Sockel (ii) mit einem Durchmesser (iii) von 131 mm bis 135 mm, bevorzugt 133 mm, und einer Dicke (iv) von 2 mm bis 10 mm, bevorzugt 4 mm bis 8 mm, besonders bevorzugt 6 mm, sowie ein Kopfteil (v) mit einem Durchmesser (vi) von 54 mm bis 56 mm, bevorzugt 55 mm aufweist und wobei der Abschluss des Kopfteils in Form einer konvexen Linse (xxx) ausgestaltet ist. Unter dem Ausdruck Abschluss des Kopfteils ist insbesondere die Oberfläche des vom Sockel (ii) abgewandten Endes des Kopfteils zu verstehen. Außerdem betrifft die Erfindung Automobile enthaltend die erfindungsgemäßen Federelemente.The invention relates to a spring element based on a cylindrical damping element (i) based on polyisocyanate polyaddition products, preferably based on cellular polyurethane elastomers, which may optionally contain polyurea structures, particularly preferably based on cellular polyurethane elastomers, preferably with a density according to DIN 53 420 of 200 to 1100, preferably 300 to 800 kg/m 3 , a tensile strength according to DIN 53571 of £ 2, preferably 2 to 8 N/mm 2 , an elongation according to DIN 53571 of £ 300, preferably 300 to 700% and a tear resistance according to DIN 53515 of ä 8, preferably 8 to 25 N/mm, wherein the spring elements have a circumferential base (ii) with a diameter (iii) of 131 mm to 135 mm, preferably 133 mm, and a thickness (iv) from 2 mm to 10 mm, preferably 4 mm to 8 mm, particularly preferably 6 mm, and a head part (v) with a diameter (vi) from 54 mm to 56 mm, preferably 55 mm, and wherein the end of the head part is designed in the form of a convex lens (xxx). The term end of the head part is to be understood in particular as the surface of the end of the head part facing away from the base (ii). The invention also relates to automobiles containing the spring elements according to the invention.
Aus Polyurethanelastomeren hergestellte Federungselemente werden in Automobilen beispielsweise innerhalb des Fahrwerks verwendet und sind allgemein bekannt. Sie werden insbesondere in Kraftfahrzeugen als schwingungsdämpfende Federelemente eingesetzt. Dabei übernehmen die Federelemente eine Endanschlagfunktion, beeinflussen die Kraft-Weg-Kennung des Rades durch das Ausbilden oder Verstärken einer progressiven Charakteristik der Fahrzeugfederung. Die Nickeffekte des Fahrzeuges können reduziert werden und die Wankabstützung wird verstärkt. Insbesondere durch die geometrische Gestaltung wird die Anlaufsteifigkeit optimiert, dies hat maßgeblichen Einfluss auf den Federungskomfort des Fahrzeuges. Durch die gezielte Auslegung der Geometrie ergeben sich über der Lebensdauer nahezu konstante Bauteileigenschaften. Durch diese Funktion wird der Fahrkomfort erhöht und ein Höchstmaß an Fahrsicherheit gewährleistet.Suspension elements made from polyurethane elastomers are used in automobiles, for example in the chassis, and are well known. They are used in particular in motor vehicles as vibration-damping spring elements. The spring elements take on an end stop function, influencing the force-displacement characteristic of the wheel by developing or strengthening a progressive characteristic of the vehicle suspension. The pitching effects of the vehicle can be reduced and the roll support is increased. The geometric design in particular optimizes the starting stiffness, which has a significant influence on the suspension comfort of the vehicle. The targeted design of the geometry results in almost constant component properties over the service life. This function increases driving comfort and ensures the highest level of driving safety.
Aus dem deutschen Gebrauchsmuster 20204302.9 sind Zusatzfedern bekannt. Nachteilig war, dass Automobile, in denen diese bekannten Zusatzfedern getestet wurden, bei extremen Fahrmanövern plötzlich auftretende Achsratensprünge zeigten, bei denen sich die Steifigkeit der Hinterachse durch den Einsatz der Zusatzfeder spontan änderte und dadurch das Fahrzeug schwerer zu kontrollieren war.Additional springs are known from the German utility model 20204302.9. The disadvantage was that automobiles in which these known additional springs were tested showed sudden jumps in axle rate during extreme driving maneuvers, in which the stiffness of the rear axle changed spontaneously due to the use of the additional spring, making the vehicle more difficult to control.
Aufgabe der vorliegenden Erfindung war es somit, für ein Automobilmodell eine geeignete Zusatzfeder mit den oben genannten Funktionen zu entwickeln, die den spezifischen Anforderungen gerade dieses Modells gerecht wird und einen möglichst guten Fahrkomfort und eine ausgezeichnete Fahrsicherheit gewährleistet. Insbesondere sollten diese Vorteile bei Fahrzeugen mit einer Hinterachse mit Stahlfeder mit linearer Kennung entwickelt werden, da es gerade bei linearen Stahlfeder bei eingeleiteten maximal Kräften, beispielsweise bei Schlaglochdurchfahrten, zu Berührungen der Stahlfederwindungen kommen kann. Dieses Anschlagen der Stahlfeder bei extremen Einfederungen sollte durch die erfindungsgemäßen Zusatzfedern, im vorliegenden Fall auch Anschlag stop genannt, verhindert werden. Außerdem sollten bei Automobilen, in denen die Zusatzfedern zum Einsatz kommen, plötzlich auftretende Achsratensprünge vermieden werden, bei denen sich die Steifigkeit der Hinterachse spontan ändert.The object of the present invention was therefore to develop a suitable additional spring with the above-mentioned functions for an automobile model, which meets the specific requirements of this model in particular and ensures the best possible driving comfort and excellent driving safety. In particular, these advantages should be developed for vehicles with a rear axle with a steel spring with a linear characteristic, since with linear steel springs in particular, the steel spring coils can come into contact when maximum forces are introduced, for example when driving over potholes. This impact of the steel spring during extreme deflections should be prevented by the additional springs according to the invention, in this case also called a stop stop. In addition, in automobiles in which the additional springs are used, sudden axle rate jumps should be avoided, in which the stiffness of the rear axle changes spontaneously.
Diese Anforderungen werden durch die eingangs dargestellten Federelemente erfüllt.These requirements are met by the spring elements presented at the beginning.
Um das Anschlagen der Stahlfeder bei extremen Einfederungen zu verhindern, wird ein sog. Anschlag stop, in dieser Schrift auch als Federelement bezeichnet, gebraucht. Dieser Anschlag stop verhindert durch seine progressive KrafWWeg Kennung ein Berühren der Federwindungen. Dadurch werden Kontaktgeräusche verhindert und die Lebensdauer der Stahlfeder verlängert. Der Anschlag stop in der erfindungsgemäßen Form erfüllt noch eine zweite Aufgabe: Er isoliert die Stahlfeder von dem Querlenker. Im Belastungsfall kommt durch die Verwindung der Feder zu Relativbewegungen zwischen Stahlfeder und, in dem beschrieben Fall, dem Querlenker. Ohne Isolationswerkstoff kommt es zu einem metallischen Geräusch, dem sog Knatschen. Zusätzlich werden die Eigenfrequenz-Resonanzen durch die beschriebene Erfindung gedämpft. Der erfindungsgemäße Körper wird bevorzugt auf eine Aufnahme auf dem Querlenker bevorzugt des Automobilfahrwerks gesteckt, wobei seine Krempe, in dieser Schrift auch als Sockel (ii) bezeichnet, einen weiteren Teil des Querlenkers bedeckt. Auf dieser Krempe wickeln sich die Federwindungen im Belastungsfall ab. Das Kopfteil (v) der Erfindung befindet sich bevorzugt in der Stahlfeder. Die letzte Windung der Stahlfeder wird bevorzugt auf den Anschlag stop aufgeknüpft. Im Belastungsfall trifft bevorzugt ein an der Karosse befindliches Gegenstück, der sogenannte Hammer auf das Kopfteil (v) des erfindungsgemäßen Federelementes.In order to prevent the steel spring from striking during extreme compression, a so-called stop, also referred to in this document as a spring element, is used. This stop prevents the spring coils from touching due to its progressive force/displacement characteristic. This prevents contact noise and extends the service life of the steel spring. The stop in the form according to the invention fulfills a second task: it isolates the steel spring from the wishbone. When loaded, the twisting of the spring leads to relative movements between the steel spring and, in the case described, the wishbone. Without insulation material, a metallic noise occurs, the so-called cracking. In addition, the natural frequency resonances are dampened by the invention described. The body according to the invention is preferably placed on a holder on the wishbone, preferably of the automobile chassis, with its brim, also referred to in this document as base (ii), covering another part of the wishbone. The spring coils unwind on this brim when loaded. The head part (v) of the invention is preferably located in the steel spring. The last turn of the steel spring is preferably attached to the stop. In the event of a load, a counterpart located on the body, the so-called hammer, preferably strikes the head part (v) of the spring element according to the invention.
Im Vergleich zu den aus dem deutschen Gebrauchsmuster 20204302.9 bekannten Gebruchsmustern konnte der Einsatzpunkt noch weicher gestaltet werden, wobei sich das Blockmaß und die dynamischen Eigenschaften jedoch nicht wesentlich verändern sollten. Dies konnte aufgrund des gegebenen Bauraums und der metallischen Anbindungsteile durch die erfindungsgemäße Ausgestaltung des Federkopfes erreichtCompared to the utility models known from the German utility model 20204302.9, the point of application could be made even softer, although the block size and the dynamic properties should not change significantly. This could be achieved due to the given installation space and the metallic connecting parts by the inventive design of the spring head.
• ♦ » • · · &iacgr; •♦ » • · · &iacgr;
• _• _
werden. Dabei wurde erfindungsgemäß eine konvexe Linse auf den Federkopf konstruiert, die einen früheren Einsatzpunkt der Zusatzfeder bedeutete. Dadurch konnte die Anfangssteifigkeit besser an die Steifigkeit der Stahlfeder angepasst werden. Ein plötzlicher Anstieg der Achsrate konnte durch die erfindungsgemäßen Zusatzfedern vermieden werden.According to the invention, a convex lens was constructed on the spring head, which meant an earlier point of application of the additional spring. This made it possible to better adapt the initial stiffness to the stiffness of the steel spring. A sudden increase in the axle rate could be avoided by the additional springs according to the invention.
Durch den Einsatz dieser aufgesetzten Linse ist die Entlüftung des Bauteil in der Produktion jedoch erschwert. Um das Problem von Lufteinschlüssen an der Linse zu eliminieren, kommt erfindungsgemäß das erhaben ausgestaltete Sternmuster auf der Linse zum Einsatz. Dieses Sternmuster weist bevorzugt zwischen 2 und 10, bevorzugt radial von der Mitte der zylindrischen Zusatzfeder ausgerichtete Erhebungen (xx) auf.However, the use of this attached lens makes it more difficult to ventilate the component during production. In order to eliminate the problem of air inclusions on the lens, the raised star pattern on the lens is used according to the invention. This star pattern preferably has between 2 and 10 elevations (xx), preferably aligned radially from the center of the cylindrical additional spring.
Die erfindungsgemäßen Federelemente sind im Detail in den Figuren 1 und 2 dargestellt. In allen Figuren sind die angegebenen Maße in [mm] angegeben. Gerade diese dreidimensionale Form erwies sich als besonders geeignet, den spezifischen Anforderungen durch das spezielle Automobilmodell gerecht zu werden, insbesondere auch im Hinblick auf die spezifischen räumlichen Anforderungen und die geforderte Federcharakteristik.The spring elements according to the invention are shown in detail in Figures 1 and 2. In all figures, the dimensions given are given in [mm]. This three-dimensional shape in particular proved to be particularly suitable for meeting the specific requirements of the special automobile model, in particular with regard to the specific spatial requirements and the required spring characteristics.
Durch die Isolation der Stahlfeder zum Querlenker und die Bedämpfung der Eigenfrequenzen der Stahlfeder konnte durch die erfindungsgemäßen Zusatzfedern ein erhebliches plus im Fahrkomfort erreicht werden. Der Einsatzpunkt konnte noch weicher gestaltet werden, wobei das Blockmaß und die dynamischen Eigenschaften nicht wesentlich verändert wurden.By isolating the steel spring from the wishbone and dampening the natural frequencies of the steel spring, the additional springs according to the invention made it possible to achieve a significant increase in driving comfort. The point of application could be made even softer, whereby the block size and the dynamic properties were not significantly changed.
Bevorzugt weist das erfindungsgemäße Federelement eine Höhe (vii) von 78 mm bis 82 mm, besonders bevorzugt 80 mm auf. Bevorzugt weist das Federelement im Übergang zwischen dem Sockel (ii) und dem Kopfteil (v) einen äußeren Durchmesser (viii) von 48,7 mm bis 50,3 mm, besonders bevorzugt 49,5 mm auf. Bevorzugt besitzt das Federelement einen Hohlraum (ix) mit einem Durchmesser (x) von 40,5 mm bis 41,5 mm, besonders bevorzugt 41 mm. Bevorzugt befindet sich in dem Hohlraum (ix) in einer Höhe (xi) von 40 mm bis 41 mm, besonders bevorzugt 40,5 mm eine Ausstülpung (xii). Der Durchmesser (xiv) des Hohlraums (ix) beträgt am Fuße der Ausstülpung (xii) bevorzugt 38,3 mm bis 39,5 mm, besonders bevorzugt 39 mm.The spring element according to the invention preferably has a height (vii) of 78 mm to 82 mm, particularly preferably 80 mm. The spring element preferably has an outer diameter (viii) of 48.7 mm to 50.3 mm, particularly preferably 49.5 mm, in the transition between the base (ii) and the head part (v). The spring element preferably has a cavity (ix) with a diameter (x) of 40.5 mm to 41.5 mm, particularly preferably 41 mm. A protuberance (xii) is preferably located in the cavity (ix) at a height (xi) of 40 mm to 41 mm, particularly preferably 40.5 mm. The diameter (xiv) of the cavity (ix) at the foot of the protuberance (xii) is preferably 38.3 mm to 39.5 mm, particularly preferably 39 mm.
In dem Fahrwerk, das der vorliegenden Problemstellung zugrunde lag, treten sehr hohe Übertragungskräfte auf. Nur durch die spezielle Ausgestaltung der erfindungsgemäßen Federelemente werden die Kräfte gedämpft und die angrenzenden Teile nicht beschädigt. Um eine größere Auflagefläche zu schaffen und um die Druck-Spannungen im Bauteil zu reduzieren, kann bevorzugt ein Einleger (xiii) in denVery high transmission forces occur in the chassis that was the basis for the present problem. Only through the special design of the spring elements according to the invention are the forces dampened and the adjacent parts not damaged. In order to create a larger contact surface and to reduce the compressive stresses in the component, an insert (xiii) can preferably be inserted into the
t · • t t · • t
Hohlraum (ix) positioniert werden, bevorzugt kann dieser Einleger (xiii) hinter die Ausstülpung (xii) fixiert, bevorzugt geclippst werden. Der Einlager kann bevorzugt aus harten Materialien, besonders bevorzugt Metallen, z.B. Aluminium, Stahl oder Kupfer, oder harten Kunststoffen, z.B. Polyoxymethylen, Polyamid, Polyester, Polystyrol, insbesondere Polyamid bestehen. Durch diesen Einleger kann die Lebensdauer der erfindungsgemäßen Federelemente erheblich gesteigert werden. Durch die Isolation der Stahlfeder zum Querlenker und die Bedämpfung der Eigenfrequenzen der Stahlfeder wird erfindungsgemäß der Fahrkomfort erheblich gesteigert.Cavity (ix), preferably this insert (xiii) can be fixed, preferably clipped, behind the protuberance (xii). The insert can preferably consist of hard materials, particularly preferably metals, e.g. aluminum, steel or copper, or hard plastics, e.g. polyoxymethylene, polyamide, polyester, polystyrene, in particular polyamide. The service life of the spring elements according to the invention can be increased considerably by this insert. By isolating the steel spring from the wishbone and damping the natural frequencies of the steel spring, driving comfort is increased considerably according to the invention.
Die erfindungsgemäßen Körper (i) basieren bevorzugt auf Elastomeren auf der Basis von Polyisocyanat-Polyadditionsprodukten, beispielsweise Polyurethanen und/oder Polyharnstoffen, beispielsweise Polyurethanelastomeren, die gegebenenfalls Harnstoffstrukturen enthalten können. Bevorzugt handelt es sich bei den Elastomeren um mikrozellige Elastomere auf der Basis von Polyisocyanat-Polyadditionsprodukten, bevorzugt mit Zellen mit einem Durchmesser von 0,01 mm bis 0,5 mm, besonders bevorzugt 0,01 bis 0,15 mm. Besonders bevorzugt besitzen die Elastomere die eingangs dargestellten physikalischen Eigenschaften. Elastomere auf der Basis von Polyisocyanat-Polyadditionsprodukten und ihre Herstellung sind allgemein bekannt und vielfältig beschreiben, beispielsweise in EP-A 62 835, EP-A 36 994, EP-A 250 969, DE-A 195 48 770 und DE-A 195 48 771.The bodies (i) according to the invention are preferably based on elastomers based on polyisocyanate polyaddition products, for example polyurethanes and/or polyureas, for example polyurethane elastomers, which may optionally contain urea structures. The elastomers are preferably microcellular elastomers based on polyisocyanate polyaddition products, preferably with cells having a diameter of 0.01 mm to 0.5 mm, particularly preferably 0.01 to 0.15 mm. The elastomers particularly preferably have the physical properties described at the outset. Elastomers based on polyisocyanate polyaddition products and their production are generally known and described in many ways, for example in EP-A 62 835, EP-A 36 994, EP-A 250 969, DE-A 195 48 770 and DE-A 195 48 771.
Die Herstellung erfolgt üblicherweise durch Umsetzung von Isocyanaten mit gegenüber Isocyanaten reaktiven Verbindungen.The production is usually carried out by reacting isocyanates with compounds that are reactive towards isocyanates.
Die Elastomere auf der Basis von zelligen Polyisocyanat-Polyadditionsprodukte werden üblicherweise in einer Form hergestellt, in der man die reaktiven Ausgangskomponenten miteinander umsetzt. Als Formen kommen hierbei allgemein übliche Formen in Frage, beispielsweise Metallformen, die aufgrund ihrer Form die erfindungsgemäße dreidimensionale Form des Federelements gewährleisten.The elastomers based on cellular polyisocyanate polyaddition products are usually produced in a mold in which the reactive starting components are reacted with one another. Generally common molds can be used as molds, for example metal molds, which, due to their shape, ensure the three-dimensional shape of the spring element according to the invention.
Die Herstellung der Polyisocyanat-Polyadditionsprodukte kann nach allgemein bekannten Verfahren erfolgen, beispielsweise indem man in einem ein- oder zweistufigen Prozess die folgenden Ausgangsstoffe einsetzt:The polyisocyanate polyaddition products can be prepared by well-known methods, for example by using the following starting materials in a one- or two-stage process:
(a) Isocyanat,(a) isocyanate,
(b) gegenüber Isocyanaten reaktiven Verbindungen,(b) compounds reactive towards isocyanates,
(c) Wasser und gegebenenfalls(c) water and, where appropriate,
(d) Katalysatoren,(d) catalysts,
(e) Treibmittel und/oder(e) propellants and/or
(f) Hilfs- und/oder Zusatzstoffe, beispielsweise Polysiloxane und/oder Fettsäuresulfonate. (f) Auxiliaries and/or additives, for example polysiloxanes and/or fatty acid sulfonates.
Die Oberflächentemperatur der Forminnenwand beträgt üblicherweise 40 bis 950C, bevorzugt 50 bis 9O0C. Die Herstellung der Formteile wird vorteilhafterweise bei einem NCO/OH-Verhältnis von 0,85 bis 1,20 durchgeführt, wobei die erwärmten Ausgangskomponenten gemischt und in einer der gewünschten Formteildichte entsprechenden Menge in ein beheiztes, bevorzugt dichtschließendes Formwerkzeug gebracht werden. Die Formteile sind üblicherweise nach 5 bis 60 Minuten ausgehärtet und damit entformbar. Die Menge des in das Formwerkzeug eingebrachten Reaktionsgemisches wird üblicherweise so bemessen, dass die erhaltenen Formkörper die bereits dargestellte Dichte aufweisen. Die Ausgangskomponenten werden üblicherweise mit einer Temperatur von 15 bis 1200C, vorzugsweise von 30 bis 11O0C, in das Formwerkzeug eingebracht. Die Verdichtungsgrade zur Herstellung der Formkörper liegen zwischen 1,1 und 8, vorzugsweise zwischen 2 und 6.The surface temperature of the inner wall of the mold is usually 40 to 95 ° C, preferably 50 to 90 ° C. The molded parts are advantageously produced at an NCO/OH ratio of 0.85 to 1.20, the heated starting components being mixed and introduced into a heated, preferably tightly sealed mold in an amount corresponding to the desired molded part density. The molded parts are usually cured after 5 to 60 minutes and can therefore be demolded. The amount of reaction mixture introduced into the mold is usually such that the resulting molded bodies have the density already shown. The starting components are usually introduced into the mold at a temperature of 15 to 120 ° C, preferably 30 to 110 ° C. The degrees of compaction for producing the molded bodies are between 1.1 and 8, preferably between 2 and 6.
Claims (10)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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DE20307898U DE20307898U1 (en) | 2003-05-19 | 2003-05-19 | Spring based on a cylindrical damping element made of a material derived from polyisocyanate polyaddition products has a circumferential base section and a head section with an end shaped as a convex lens |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE20307898U DE20307898U1 (en) | 2003-05-19 | 2003-05-19 | Spring based on a cylindrical damping element made of a material derived from polyisocyanate polyaddition products has a circumferential base section and a head section with an end shaped as a convex lens |
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DE20307898U1 true DE20307898U1 (en) | 2003-07-24 |
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DE20307898U Expired - Lifetime DE20307898U1 (en) | 2003-05-19 | 2003-05-19 | Spring based on a cylindrical damping element made of a material derived from polyisocyanate polyaddition products has a circumferential base section and a head section with an end shaped as a convex lens |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1734275A3 (en) * | 2005-06-18 | 2007-02-14 | ThyssenKrupp Bilstein Suspension GmbH | Shock absorber and spring element for a shock absorber |
CN109790892A (en) * | 2016-10-06 | 2019-05-21 | 法国库博标准公司 | Anti-vibration mounts and its automotive of outfit for automotive |
-
2003
- 2003-05-19 DE DE20307898U patent/DE20307898U1/en not_active Expired - Lifetime
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1734275A3 (en) * | 2005-06-18 | 2007-02-14 | ThyssenKrupp Bilstein Suspension GmbH | Shock absorber and spring element for a shock absorber |
CN109790892A (en) * | 2016-10-06 | 2019-05-21 | 法国库博标准公司 | Anti-vibration mounts and its automotive of outfit for automotive |
CN109790892B (en) * | 2016-10-06 | 2021-01-12 | 法国库博标准公司 | Anti-vibration support for a motor vehicle and motor vehicle equipped with same |
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