EP3807554A1 - Schraubenfeder einer kraftfahrzeugfederung, verfahren zu deren herstellung sowie kraftfahrzeugfederung - Google Patents
Schraubenfeder einer kraftfahrzeugfederung, verfahren zu deren herstellung sowie kraftfahrzeugfederungInfo
- Publication number
- EP3807554A1 EP3807554A1 EP19731947.8A EP19731947A EP3807554A1 EP 3807554 A1 EP3807554 A1 EP 3807554A1 EP 19731947 A EP19731947 A EP 19731947A EP 3807554 A1 EP3807554 A1 EP 3807554A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil spring
- spring
- base body
- elastomer
- motor vehicle
- 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.)
- Pending
Links
- 239000000725 suspension Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 24
- 239000012212 insulator Substances 0.000 claims abstract description 23
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000007906 compression Methods 0.000 claims abstract description 12
- 238000004804 winding Methods 0.000 claims abstract description 7
- 239000000203 mixture Substances 0.000 claims description 31
- 229920001971 elastomer Polymers 0.000 claims description 30
- 239000000806 elastomer Substances 0.000 claims description 29
- 229920001228 polyisocyanate Polymers 0.000 claims description 22
- 239000005056 polyisocyanate Substances 0.000 claims description 22
- 238000000034 method Methods 0.000 claims description 18
- 238000005266 casting Methods 0.000 claims description 17
- 238000000576 coating method Methods 0.000 claims description 17
- 239000011248 coating agent Substances 0.000 claims description 16
- 229920005862 polyol Polymers 0.000 claims description 15
- 150000003077 polyols Chemical class 0.000 claims description 12
- 239000010410 layer Substances 0.000 claims description 10
- 239000004970 Chain extender Substances 0.000 claims description 9
- 230000001413 cellular effect Effects 0.000 claims description 9
- YTCQFLFGFXZUSN-BAQGIRSFSA-N microline Chemical compound OC12OC3(C)COC2(O)C(C(/Cl)=C/C)=CC(=O)C21C3C2 YTCQFLFGFXZUSN-BAQGIRSFSA-N 0.000 claims description 9
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims description 7
- 229920002635 polyurethane Polymers 0.000 claims description 7
- 239000004814 polyurethane Substances 0.000 claims description 7
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims description 7
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 6
- 229920002396 Polyurea Polymers 0.000 claims description 5
- 239000005997 Calcium carbide Substances 0.000 claims description 4
- 239000003822 epoxy resin Substances 0.000 claims description 4
- 229920000647 polyepoxide Polymers 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 4
- CLZWAWBPWVRRGI-UHFFFAOYSA-N tert-butyl 2-[2-[2-[2-[bis[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]amino]-5-bromophenoxy]ethoxy]-4-methyl-n-[2-[(2-methylpropan-2-yl)oxy]-2-oxoethyl]anilino]acetate Chemical compound CC1=CC=C(N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)C(OCCOC=2C(=CC=C(Br)C=2)N(CC(=O)OC(C)(C)C)CC(=O)OC(C)(C)C)=C1 CLZWAWBPWVRRGI-UHFFFAOYSA-N 0.000 claims description 4
- 238000003618 dip coating Methods 0.000 claims description 2
- 239000007788 liquid Substances 0.000 claims description 2
- 239000011247 coating layer Substances 0.000 claims 1
- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 9
- 230000008901 benefit Effects 0.000 description 7
- -1 ether polyol Chemical class 0.000 description 7
- 239000000047 product Substances 0.000 description 6
- 239000012948 isocyanate Substances 0.000 description 5
- 150000002513 isocyanates Chemical class 0.000 description 5
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 125000000524 functional group Chemical group 0.000 description 4
- 229920000728 polyester Polymers 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 3
- 239000004721 Polyphenylene oxide Substances 0.000 description 3
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920000570 polyether Polymers 0.000 description 3
- 229930040373 Paraformaldehyde Natural products 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- RRAMGCGOFNQTLD-UHFFFAOYSA-N hexamethylene diisocyanate Chemical compound O=C=NCCCCCCN=C=O RRAMGCGOFNQTLD-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920002647 polyamide Polymers 0.000 description 2
- 229920005906 polyester polyol Polymers 0.000 description 2
- 229920006324 polyoxymethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000010107 reaction injection moulding Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HUXGPXHPGSIYOD-UHFFFAOYSA-N 1-isocyanato-2-[(2-isocyanatocyclohexyl)methyl]cyclohexane Chemical compound O=C=NC1CCCCC1CC1C(N=C=O)CCCC1 HUXGPXHPGSIYOD-UHFFFAOYSA-N 0.000 description 1
- AOFIWCXMXPVSAZ-UHFFFAOYSA-N 4-methyl-2,6-bis(methylsulfanyl)benzene-1,3-diamine Chemical compound CSC1=CC(C)=C(N)C(SC)=C1N AOFIWCXMXPVSAZ-UHFFFAOYSA-N 0.000 description 1
- 206010063659 Aversion Diseases 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 229920001730 Moisture cure polyurethane Polymers 0.000 description 1
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 235000010290 biphenyl Nutrition 0.000 description 1
- 239000004305 biphenyl Substances 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
- 238000005336 cracking Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 235000014113 dietary fatty acids Nutrition 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- 229930195729 fatty acid Natural products 0.000 description 1
- 239000000194 fatty acid Substances 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Natural products C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000036316 preload Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000011541 reaction mixture Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 125000003396 thiol group Chemical group [H]S* 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
- F16F1/02—Springs made of steel or other material having low internal friction; Wound, torsion, leaf, cup, ring or the like springs, the material of the spring not being relevant
- F16F1/04—Wound springs
- F16F1/12—Attachments or mountings
- F16F1/126—Attachments or mountings comprising an element between the end coil of the spring and the support proper, e.g. an elastomeric annulus
Definitions
- Coil spring of a motor vehicle suspension method for its
- the present invention relates to a coil spring of a motor vehicle suspension, wherein the coil spring is designed to be variable in length in the direction of a longitudinal axis between a state of minimal compression and a state of maximum compression, and has an end turn.
- Coil springs of the type mentioned at the outset are generally known in the prior art and are used in motor vehicle suspensions in order to spring the chassis of the vehicles. In the installed state, the coil springs rest on spring plates, which are usually mounted in receptacles, which in turn are connected to the body or the wheel suspension.
- the reliable function and stability of the coil spring of a motor vehicle suspension is of outstanding importance for vehicle safety.
- To increase the stability of coil springs they are usually provided with a coating that prevents corrosion and the penetration of moisture, acid, etc. In the driving operation of motor vehicles, particles and moisture are inevitably whirled up, which reach the coil spring of the vehicle suspension.
- the coil spring is elongated and compressed, which leads to a variable gap being formed between the end turn and the spring plate in conventional motor vehicle suspensions. Particles and moisture that penetrate this variable gap attack the coating of the coil spring through friction. In the long term, this leads to Failure of the coating, and therefore corrosion, cracking and in the worst case, spring break. This should be avoided if possible.
- coil spring isolators are used in the prior art. These are located between the spring plate and the spring and serve as a buffer, especially when the spring is strongly compressed. However, it has been shown that dirt and moisture can settle between the insulator and the coil spring, which adversely affects the life of the coil spring.
- the object of the invention was to improve a helical spring of the type described in the introduction in such a way that the stability of the helical spring is further increased.
- the invention was based on the object of further reducing the risk of dirt and moisture penetrating.
- the invention solves the problem on which it is based, in that a base body of a coil spring insulator is molded onto the coil spring in the region of the end turn, the base body being formed from an elastically deformable material and being adapted to rest on a spring plate of the motor vehicle suspension.
- the invention is based on the knowledge that by molding the coil spring insulator onto the coil spring, it can be prevented in a very simple and reliable manner in the long term that undesired material accumulates on the coil spring and leads to damage due to aversion. Because the helical spring insulator is firmly connected to the helical spring in the region of its delivery in the molded state, any gap between the helical spring insulator and the helical spring is avoided.
- the invention is advantageously further developed in that the base body at least partially encloses the turns of the coil spring in the region of the end turn.
- the coil spring insulator with its base body encloses a region of the end turn by at least more than half the turn diameter, so that a loosening of the turn from the base body and the associated gap formation are excluded.
- the base body is particularly preferably integrally connected to the helical spring, in particular cast onto the helical spring.
- the base body is preferably arranged along at least one complete turn of the helical spring and is adapted to be in contact with the helical spring both with maximum and with minimal compression of the helical spring.
- the base body has a positioning element on an end face facing away from the helical spring, which is set up for positive connection to a corresponding counter element on a spring plate.
- the positioning element preferably extends in the direction of the longitudinal axis of the helical spring, the longitudinal axis being defined as that Axis in which the length change takes place due to compression and relaxation of the coil spring.
- the elastically deformable material of the base body preferably comprises or preferably consists of a (em) cold cast elastomer, particularly preferably a (em) cold cast polyurethane cast elastomer, which is preferably obtained or obtainable by reacting at least the components:
- the polyisocyanate composition according to (iii) preferably contains at least one polyisocyanate selected from the diisocyanates, preferably selected from the group consisting of 2,2'-diphenylmethane diisocyanate (2,2'-MDI), 2,4'-
- the polyol composition according to (iv) preferably comprises at least one polyester, polyether and polyester ether polyol, preferably selected from the group of the two to six functional polyester polyols, polyester ether polyols and polyether polyols, preferably from the group of the two and three functional polyester polyols, polyester ether polyols and polyether polyols and the like mixtures.
- the chain extender composition according to (iv) preferably comprises at least one compound which has at least two isocyanate-reactive functional groups, preferably two isocyanate-reactive functional groups, the isocyanate-reactive functional groups preferably being selected from the group of hydroxyl group, amino group and thiol group , wherein the at least one compound which has functional groups reactive toward isocyanates is further preferably selected from the group consisting of monoethylene glycol, 1,4-butanediol, diethylene glycol, glycerol, trimethylolpropane and 2,4-diamino-3,5-di ( methylthio) toluene, and more preferably comprises at least 1,4-butanediol.
- the polyisocyanate composition (iii) is preferably in the form of an isocyanate-terminated prepolymer (iii.a), obtained or obtainable from the reaction of polyisocyanate composition (iii) with part of the polyol composition (iv), and the polyurethane obtained or obtainable by reaction isocyanate-terminated prepolymer of at least components (iii.a); (iv.a) remaining portion of the polyol composition (iv); (v) optional chain extender composition.
- a spring element is arranged on the base body on a side facing away from the helical spring, and is set up to rest on the spring plate of the vehicle suspension. This makes it possible to form the base body from a somewhat harder material, because any necessary spring forces can also be applied by the spring element. Depending on the preload of the coil spring, this leads to a somewhat gentler response behavior of the motor vehicle suspension.
- the spring element is preferably wedge-shaped and further preferably has a shape corresponding to the base body.
- the spring element is preferably partially or completely made of a volume-compressible material.
- the volume-compressible material is particularly preferably in the form of an elastomer based on cellular, in particular micro-line, polyisocyanate polyaddition products, in particular based on micro-line polyurethane elastomers and / or thermoplastic polyurethane, preferably containing polyurea structures.
- volume-compressible materials such as those mentioned above have the particular advantage that they have an extremely high elastic resilience with high stability compared to other materials such as rubber.
- the polyisocyanate polyaddition products are preferably based on microcellular polyurethane elastomers, on the basis of thermoplastic polyurethane or from combinations of these two materials, which may contain polyurea structures.
- Microline polyurethane elastomers are particularly preferred which, in a preferred embodiment, have a density according to DIN 53420 of 200 kg / m3 to 1,100 kg / m3, preferably 300 kg / m3 to 800 kg / m3, a tensile strength according to DIN 53571 of 2 N / mm2, preferably 2 N / mm 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 preferably 8 N / mm to 25 N / mm.
- the elastomers are preferably micro-line elastomers based on polyisocyanate polyaddition products, preferably with cells with a diameter of 0.01 mm to 0.5 mm, particularly preferably 0.01 to 0.15 mm.
- Elastomers based on polyisocyanate polyaddition products and their preparation are generally known and can be described in many different 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 771st
- the preparation is usually carried out by reacting isocyanates with compounds which are reactive toward isocyanates.
- the elastomers based on cellular polyisocyanate polyadducts are usually produced in a form in which the reactive starting components are reacted with one another.
- generally customary shapes are considered as shapes, for example metal shapes which, because of their shape, ensure the three-dimensional shape of the spring element according to the invention.
- the contour elements are produced by means of a foam mold. In a further embodiment, they are subsequently worked into the concentric base body. Parts made from semi-finished products are also conceivable. The production can e.g. done via water jet cutting.
- the polyisocyanate polyaddition products can be prepared by generally known processes, for example by using the following starting materials in a one- or two-stage process:
- auxiliaries and / or additives for example polysiloxanes and / or fatty acid sulfonates.
- the surface temperature of the mold inner wall is usually 40 ° C to 95 ° C, preferably 50 ° C to 90 ° C.
- the production of the molded parts is advantageously carried out at an NCO / OH ratio of 0.85 to 1.20, the heated starting components being mixed and placed in a heated, preferably tight-fitting mold in an amount corresponding to the desired molded part density.
- the molded parts are hardened after 5 minutes to 60 minutes and can therefore be removed from the mold.
- the amount of the reaction mixture introduced into the mold is usually such that the moldings obtained have the density already shown.
- the starting components are usually introduced into the mold at a temperature of from 15 ° C. to 120 ° C., preferably from 30 ° C. to 110 ° C.
- the degrees of compaction for the production of the shaped bodies are between 1, 1 and 8, preferably between 2 and 6.
- the cellular polyisocyanate polyadducts are expediently produced by the "one shot” process with the aid of high-pressure technology, low-pressure technology or, in particular, reaction injection molding technology (RIM) in open or preferably closed molds.
- RIM reaction injection molding technology
- a pre-polymer process is used to produce the cellular polyisocyanate polyadducts.
- the reaction is carried out, in particular, with compression in a closed mold.
- the reaction injection molding technique is described, for example, by H. Piechota and H.
- the spring element has a continuous recess for receiving an inner support section of the spring plate, wherein a plurality of inwardly projecting projections are preferably formed in the recess.
- the receptacle with its recesses particularly preferably has a polygonal opening cross section, particularly preferably a star-shaped opening cross section.
- the projections projecting inwards in the recess are designed to nestle against an inner support section of the spring plate in the installed state of the coil spring and to ensure a secure and at the same time resilient hold.
- the spring element and the base body of the coil spring insulator are preferably integrally connected to one another, particularly preferably by means of a one- or multi-component injection molding process.
- the base body in the area in which the helical spring still at least partially encloses, has an arm in an end area, which is extended radially in the outer direction from the base body. In other words, this forms an arm which is arranged in the radially outer end region of the base body and projects somewhat radially and follows the winding direction of the helical spring.
- the area protected by the base body is lengthened in this way, and at the same time the flexibility of the base body is increased, which results in improved flexibility of the system consisting of coil spring and coil spring insulator. It is then possible for dirt and the like to accumulate between the spring plate and the coil spring insulator in the area of the end area exhibited, but this can be tolerated against the background that the coil spring remains safely protected by means of the base body.
- the base body is preferably ring-shaped, and the flared arm extends outward from the ring shape. In a further preferred embodiment, the base body is crescent-shaped. In contrast to the embodiment described above with an otherwise ring-shaped base body, the coil spring insulator is thus minimized in the course of the end turn, which means that the cast material is used optimally.
- the base body is preferably set up to be placed on a spring plate.
- the helical spring has a coating at least in the area not enclosed by the base body, and preferably along its entire length.
- the coating is selected from the list consisting of: (iii) a polyisocyanate composition
- the invention has been described above with reference to the coil spring according to a first aspect.
- the invention further relates to a motor vehicle suspension with a coil spring, a spring plate, and at least one coil spring insulator arranged between the spring plate and the coil spring.
- the motor vehicle suspension solves the underlying problem described at the outset by designing the coil spring according to one of the preferred embodiments described above.
- the motor vehicle suspension fully embraces the advantages and preferred embodiments of the helical spring described above, which is why reference is made to the above statements in order to avoid repetitions.
- the preferred embodiments and advantages of the coil spring are at the same time the preferred embodiments and advantages of the motor vehicle suspension.
- the spring plate is preferably partially or completely formed from a hard component, preferably from the list consisting of: thermoplastic polyurethane (TPU); Polypropylene (PP); Polyoxymethylene (POM); Polycarbonate (PC); or polyamide (PA).
- TPU thermoplastic polyurethane
- PP Polypropylene
- POM Polyoxymethylene
- PC Polycarbonate
- PA polyamide
- the invention relates to a method for producing a coil spring for a motor vehicle suspension.
- the method comprises the steps: provision or manufacture of a coil spring with an end turn,
- the method according to the invention also takes advantage of the advantages and preferred embodiments of the first two aspects according to the invention.
- the molding of the main body of the coil spring insulator onto the coil springs by means of casting is a particularly time and cost-efficient procedure which also leads to very reliable and durable results. Both uncoated and coated coil springs can be cast.
- a casting mold is formed in such a way that a helical compression spring with an integrally formed base body is obtained according to one of the preferred embodiments described above.
- a spring element is preferably molded onto the base body, preferably integrally, the spring element being further preferably partially or completely formed from a volume-compressible material, in particular formed as an elastomer based on cellular, in particular micro-line, polyisocyanate polyaddition products, in particular based on micro-lines Polyurethane elastomers and / or thermoplastic polyurethane, preferably containing polyurea structures.
- the above-mentioned cold casting elastomer which is preferably a polyurethane casting elastomer, is preferably used as the casting material, preferably obtained or obtainable by reacting at least the components
- the method is preferably further developed by the step:
- the coating is preferably selected from the list consisting of:
- a powder coating in particular based on an epoxy resin containing calcium carbide, a cathodic immersion layer, a layer of a cast elastomer, more preferably a cold cast elastomer, is particularly preferred a cold cast polyurethane cast elastomer (see above), or a combination of several or all of the above-mentioned layers.
- the method is supplied with a helical spring which has already been coated with one, several or all of the layers described above.
- Fig. 1 with a schematic spatial view of a motor vehicle suspension
- Fig. 2 another spatial schematic view of the coil spring
- FIG. 1 is a schematic spatial view of a coil spring according to a second embodiment
- Fig. 4 another spatial schematic view of the coil spring according to
- Fig. 6 another spatial schematic view of the coil spring according to
- FIG. 7 a schematic spatial view of a coil spring according to a fourth exemplary embodiment
- FIG. 8 a further spatial schematic view of the coil spring according to FIG
- FIG. 1 shows a motor vehicle suspension 100 which has a coil spring 1.
- the helical spring 1 can be moved in its longitudinal direction L between a state of maximum compression and a state of maximum relaxation and has one End winding 7, which is set up to at least indirectly rest on a spring plate 50 of the motor vehicle suspension 100.
- the coil spring 1 On the side facing away from the coil spring 1, in the region of the end turn 7, the coil spring 1 has a coil spring insulator 5 with a base body 3, which is set up to be connected directly to the spring plate 50.
- the base body 3 has an essentially flat end face 11, of which an arm 9 is formed to extend outwards in a radially outer end region 13, and the winding of the helical spring 1 follows.
- the base body 3 is molded onto the helical spring 1 in the region of its end turn 7, and is particularly preferably integrally connected to it.
- the base body 3 has a positioning element 15 which is designed to be inserted into a correspondingly designed recess 51 in the spring plate 50 in order to bring about a clear positional positioning of the coil spring 1 on the spring plate 50.
- Figure 2 shows the coil spring 1 obliquely from above. It can be seen here in particular that the coil spring 1 is at least partially enclosed by the base body 3 in the region of the end turn 7.
- the coil spring V shown in FIGS. 3 and 4 has, as in FIGS. 1 and 2, a base body 3 which is molded onto the coil spring 1 in its end region and at least partially surrounds the end turn 7 of the coil spring V.
- the base body 3 of the coil spring V is integrally connected to the coil spring V.
- the helical spring insulator has a spring element 17 molded onto the base body 3, which is preferably integrally connected to the base body 3.
- the spring element 17 is set up to rest or rest on the spring plate 50 of the motor vehicle suspension 100.
- FIGS. 3 and 4 no positioning element is provided in FIGS. 3 and 4. However, it would also be possible to provide a positioning element here. Likewise, no radially extended arm is shown in one end region in FIG. 3 for the base body 3. It would also be the case with the exemplary embodiment in FIGS. 3 and 4 possible to provide such an exposed end region 13. In the same way, it would be conceivable to introduce a spring element such as spring element 17 according to FIGS. 3 and 4 in FIGS. 1 and 2, cf. Figures 7, 8.
- the spring element 17 has a recess 19 in which protrusions 21 extend radially inwards.
- the projections 21 form a polygonal, in particular essentially star-shaped opening cross section in the recess 19.
- This opening cross-section means that the spring element 17, when installed, can nestle against an inner support section 53 of a spring plate 51, indicated in FIG. 1.
- FIG. 5 shows a coil spring 1 ′′, in which a coil spring insulator 5 is also cast onto the end turn 7.
- the base body 3 according to FIGS. 5 and 6 consists exclusively of a crescent-shaped section which winds along the helical spring 1 ′′.
- the end face 11 of the base body 3 according to FIGS. 5 and 6 faces away from the coil spring 1 "and is set up to mount the end region 13 of the coil spring 1" on a spring plate, which is not shown here.
- FIG. 1 shows a coil spring 1 ′′, in which a coil spring insulator 5 is also cast onto the end turn 7.
- FIGS. 7 and 8 show a helical spring 1 ′′, the base body 3 of which comes close to the structure of the base body 3 according to FIGS. 1 and 2, to the extent that, like the exemplary embodiment there, it has a radially outwardly extending arm 9 in the end region 13, which winds along the coil spring 1 '"and ensures greater flexibility.
- a spring element is arranged which has a wedge shape and is compressed when the coil spring 1 ′′ is compressed.
- the spring element 17 is preferably formed from a material that is softer relative to the base body 3 and is molded onto the base body 3.
- the spring element is preferably set up to support the fitting movement of the base body to the coil spring 1 ′′ ”, to reduce or prevent the ingress of dirt, and to dampen vibrations that occur particularly preferably.
- the coil springs 1, V, 1 ", 1 '" according to FIGS. 1 to 8 are preferably coated with one or more coatings depending on one of the preferred embodiments described above. LIST OF REFERENCE NUMBERS
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- Engineering & Computer Science (AREA)
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- Springs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018114224 | 2018-06-14 | ||
PCT/EP2019/065769 WO2019238959A1 (de) | 2018-06-14 | 2019-06-14 | Schraubenfeder einer kraftfahrzeugfederung, verfahren zu deren herstellung sowie kraftfahrzeugfederung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3807554A1 true EP3807554A1 (de) | 2021-04-21 |
Family
ID=66998387
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP19731947.8A Pending EP3807554A1 (de) | 2018-06-14 | 2019-06-14 | Schraubenfeder einer kraftfahrzeugfederung, verfahren zu deren herstellung sowie kraftfahrzeugfederung |
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EP (1) | EP3807554A1 (de) |
WO (1) | WO2019238959A1 (de) |
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FR3103528B1 (fr) * | 2019-11-26 | 2022-01-07 | Renault Sas | Jambe de force de vehicule automobile |
DE102019218494A1 (de) * | 2019-11-28 | 2021-06-02 | Thyssenkrupp Ag | Federaufnahme, Verfahren zur Herstellung einer Federaufnahme, Schwingungsdämpfer und Niveaueinstellvorrichtung |
DE102020205313A1 (de) * | 2020-04-27 | 2021-10-28 | Thyssenkrupp Ag | Federanordnung für ein Fahrwerk, Fahrzeugfahrwerk umfassend eine Federanordnung, Verfahren zum Herstellen einer Federanordnung für ein Fahrzeugfahrwerk und Verwendung einer Federanordnung |
Family Cites Families (12)
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FR1391845A (fr) * | 1964-01-17 | 1965-03-12 | Metallurg De Saint Urbain Atel | Ressort hélicoïdal perfectionné |
DE1248384B (de) * | 1966-02-24 | 1967-08-24 | Heinkel Ag Ernst | Um ihre Laengsachse umlaufende Schraubenfeder |
US4350777A (en) | 1980-03-28 | 1982-09-21 | Bayer Aktiengesellschaft | Impermeable molded articles of cellular polyurethane elastomers produced with organofunctional polysiloxane-derivatives and their use as spring elements |
DE3113690A1 (de) | 1981-04-04 | 1982-10-28 | Elastogran GmbH, 2844 Lemförde | "verfahren zur herstellung von geschlossenzelligen polyurethan-formteilen mit einer verdichteten randzone" |
DE3621040A1 (de) | 1986-06-24 | 1988-01-07 | Bayer Ag | Verfahren zur herstellung und polysiloxan-ionomeren, polysiloxan-ionomere und ihre verwendung zur herstellung von zelligen polyurethanelastomeren |
DE19548771A1 (de) | 1995-12-23 | 1997-06-26 | Basf Ag | Mikrozelluläres, harnstoffgruppenhaltiges Polyurethanelastomer |
DE19548770A1 (de) | 1995-12-23 | 1997-06-26 | Basf Ag | Mikrozelluläres, harnstoffgruppenhaltiges Polyurethanelastomer |
JP3696400B2 (ja) * | 1998-04-28 | 2005-09-14 | 鬼怒川ゴム工業株式会社 | 車両懸架装置のスプリングシートラバー |
FR2986292B1 (fr) * | 2012-01-30 | 2014-02-28 | Peugeot Citroen Automobiles Sa | Dispositif de securite pour un ressort helicoidal de suspension, comportant une gaine |
DE102012213905A1 (de) * | 2012-08-06 | 2014-05-22 | Bayerische Motoren Werke Aktiengesellschaft | Federteller |
US20200086707A1 (en) * | 2017-04-06 | 2020-03-19 | Basf Se | Spring support configured to receive a coil spring of a motor-vehicle spring system, motor-vehicle spring system, and use of a spring support |
DE102017221652A1 (de) * | 2017-12-01 | 2019-06-06 | Volkswagen Aktiengesellschaft | Federeinrichtung für eine Kraftfahrzeugradaufhängung |
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2019
- 2019-06-14 EP EP19731947.8A patent/EP3807554A1/de active Pending
- 2019-06-14 WO PCT/EP2019/065769 patent/WO2019238959A1/de active Application Filing
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