EP3844418A1 - Schraubenfeder für ein fahrwerk und ein verfahren zum herstellen einer schraubenfeder für ein fahrwerk - Google Patents
Schraubenfeder für ein fahrwerk und ein verfahren zum herstellen einer schraubenfeder für ein fahrwerkInfo
- Publication number
- EP3844418A1 EP3844418A1 EP19758972.4A EP19758972A EP3844418A1 EP 3844418 A1 EP3844418 A1 EP 3844418A1 EP 19758972 A EP19758972 A EP 19758972A EP 3844418 A1 EP3844418 A1 EP 3844418A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- coil spring
- area
- hose
- adhesive
- hose element
- 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.)
- Withdrawn
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 13
- 238000000576 coating method Methods 0.000 claims abstract description 20
- 239000011248 coating agent Substances 0.000 claims abstract description 18
- 239000003973 paint Substances 0.000 claims abstract description 13
- 230000001070 adhesive effect Effects 0.000 claims description 35
- 239000004922 lacquer Substances 0.000 claims description 30
- 230000007547 defect Effects 0.000 claims description 21
- 239000000853 adhesive Substances 0.000 claims description 16
- 238000001994 activation Methods 0.000 claims description 14
- 230000004913 activation Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 239000000203 mixture Substances 0.000 claims description 9
- 230000005855 radiation Effects 0.000 claims description 8
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000007725 thermal activation Methods 0.000 claims description 4
- 239000012790 adhesive layer Substances 0.000 claims description 2
- 239000003292 glue Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 description 6
- 238000007591 painting process Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000000930 thermomechanical effect Effects 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- 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
- F16F1/024—Covers or coatings therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/14—Resilient suspensions characterised by arrangement, location or kind of springs having helical, spiral or coil springs only
-
- 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
-
- 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
- B60G2202/12—Wound spring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2206/00—Indexing codes related to the manufacturing of suspensions: constructional features, the materials used, procedures or tools
- B60G2206/01—Constructional features of suspension elements, e.g. arms, dampers, springs
- B60G2206/40—Constructional features of dampers and/or springs
- B60G2206/42—Springs
- B60G2206/426—Coil springs having a particular shape, e.g. curved axis, pig-tail end coils
-
- 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
- F16F2222/00—Special physical effects, e.g. nature of damping effects
- F16F2222/10—Adhesion
-
- 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
- F16F2230/0023—Purpose; Design features protective
-
- 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
- F16F2230/10—Enclosure elements, e.g. for protection
Definitions
- the present invention relates to a coil spring for a chassis and a method for producing a coil spring for a chassis.
- Coil springs for undercarriages are known in the prior art in a large number of embodiments and are also referred to, for example, as twisted torsion springs, in particular compression springs which are wound more or less cylindrically from spring wire.
- coil springs are used for chassis as an elastic connection between the wheel axles and the vehicle body.
- Such coil springs together with other devices, usually contribute to improving driving comfort by protecting the vehicle body and vehicle occupants from bumps caused by uneven road surfaces and the vibrations resulting therefrom.
- Furthermore, such coil springs contribute to optimized driving dynamics, in particular at high driving speeds, that is to say for the wheels to grip the ground as evenly as possible and thus in particular to improve driving safety.
- coil springs are provided with a protective layer, in particular a lacquer, in particular for protection against environmental influences, which can cause corrosion, for example.
- a protective layer in particular a lacquer, in particular for protection against environmental influences, which can cause corrosion, for example.
- lacquer defects are problematic, which make the surface of the spring wire accessible to environmental influences and make them susceptible to corrosion at these points.
- paint defects can arise, for example, at the point at which the coil spring to be painted is suspended or fastened for transport through the painting process.
- paint defects still present after the painting process are painstakingly repainted, for example by manual brush application of the paint.
- the present invention is therefore based on the object of providing an improved helical spring and an improved method for producing a helical spring, in which the aforementioned disadvantages are avoided.
- this improved coil spring and the improved method for producing a coil spring are intended to provide an alternative solution for repainting lacquer defects, in particular in the painting process.
- the improved method for producing a coil spring is intended to provide a stable manufacturing process without time-consuming repainting.
- the improved method for producing the coil spring should be able to be implemented simply and safely in existing methods.
- the coil spring according to the invention with a varnish coating for a chassis has the advantage over conventional coil springs that the coil spring has no optics impaired by repainting, in particular running paint, such as paint tabs.
- the method according to the invention for producing a coil spring has the advantage over conventional methods that the overall process can be automated, in particular faster in time, for example also by saving time-consuming refinishing, drying steps and immediate packaging of the coil springs.
- Another advantage of the method according to the invention is that it can be easily and reliably integrated into existing methods.
- the invention therefore relates to a coil spring with a lacquer coating for a chassis, in particular a vehicle chassis, the lacquer coating having at least one lacquer defect, the coil spring having at least one hose element with an inner surface of the hose, with at least one lacquer defect having encased the at least one hose element and the at least one hose element is at least partially shrunk onto the coil spring.
- Another object of the invention is a method for producing a coil spring for a chassis, in particular a vehicle chassis, comprising the steps of: a) providing a coil spring with at least one paint coating, the paint coating having at least one paint defect;
- step a) arranging the at least one hose element coaxially at least in sections around the helical spring provided in step a), at least the lacquer defect being covered with the at least one hose element;
- step d) at least partially shrinking the at least one hose element arranged at least in sections coaxially around the coil spring in step c) and at least one hose element covering at least one lacquer defect on the coil spring.
- Another object of the invention is the use of a hose element with a hose inner surface to cover at least one lacquer defect of a coil spring according to the invention for a chassis, in particular a vehicle chassis.
- the invention can be implemented both in the helical spring and in a method for producing a helical spring for a chassis as well as in the use of a hose element for covering at least one lacquer defect of a helical spring according to the invention for a chassis.
- a lacquer coating in the sense of the present invention is understood to mean applying a firmly adhering layer of an informal composition to the surface of a helical spring.
- the application process and the applied layer itself is also referred to as a lacquer coating.
- the lacquer coating can be a thin layer, a thick layer or several in are connected layers.
- the lacquer coating methods differ in the type of layer application which can be carried out by chemical, mechanical, thermal and thermomechanical methods or a combination thereof. Examples of coating processes are vapor deposition, spraying, immersion or a combination thereof. In particular, drying processes subsequent to the application are also included.
- a lacquer defect is understood to mean a point on the coil spring at which the lacquer coating applied to the coil spring differs from the rest of the lacquer coating, in particular the lacquer coating is only partially applied to the lacquer defect or is missing entirely.
- a hose element in the sense of the present invention is understood to mean an element which is tubular, in particular dimensioned such that the hose element can at least partially encase the coil spring.
- a hose element is designed as a shrink hose, in particular a cold or warm shrink hose.
- Shrink-fit in the sense of the present invention is understood to mean an at least non-positive connection between a component, in particular a helical spring and the element at least partially surrounding this component, in particular a shrink tube, the non-positive connection taking place by means of a reduction in dimension, in particular a reduction in the diameter of the shrink tube, of the element surrounding the component.
- At least the inner surface of the hose has at least one area with adhesive properties, at least partially a material connection being formed between the at least one area with adhesive properties and the helical spring.
- the adhesive property is understood to mean the adhesive forces on the contact surfaces of two different substances due to molecular forces.
- the at least one area with adhesive property is an integral part of the inner surface of the hose of the at least one hose element.
- An integral component in the sense of the present invention is understood to mean that the component cannot be removed non-destructively from the element whose integral component it is.
- an area with an adhesive property that is an integral part of the inner hose surface of a hose element cannot be removed from the inner hose surface without being destroyed.
- the at least one region with adhesive property comprises at least one adhesive composition, the adhesive composition being able to be activated, in particular for the at least partial formation of the integral connection, the activability being selected from a group of thermal activation, radiation activation, in particular UV radiation activation, chemical activation, or a combination thereof
- the at least one area with adhesive property is formed as, selected from a group of an adhesive layer, an adhesive line, a number of adhesive spots, a number of adhesive lines, adhesive spot patterns or a combination thereof.
- the helical spring has at least one area with an alternating cross section, the at least one hose element being at least partially shrunk onto the helical spring at least in the at least one area with alternating cross section.
- the cross-section can change in dimension and / or geometric shape.
- the at least one hose element has a shrink rate in the range from greater than 1: 1 to less than 10: 1.
- a shrink rate is understood to mean the maximum change in size when shrinking, with no material destruction of the shrink tube.
- at least the inner surface of the tube has at least one area with adhesive properties and in a further step e) an at least partial formation of a material connection takes place between the at least one area with adhesive properties and the helical spring.
- process steps d) and e) take place simultaneously.
- the at least one area with adhesive property provided in step b) comprises at least one adhesive composition, the adhesive composition being activated, in particular for the at least partial formation of the cohesive connection in step e), the activation being selected from a group of thermal activation, radiation activation, in particular UV radiation activation, chemical activation or a combination thereof.
- FIG. 1 schematically shows a three-dimensional view of a coil spring with a lacquer defect according to the prior art
- FIG. 3 schematically shows a cross-sectional view of a coil spring according to an embodiment of the invention.
- FIG. 2 shows an embodiment of a coil spring 1 with a shrunk-on hose element 3.
- 3 shows an embodiment of a helical spring 1 with a shrunk-on hose element 3 in a cross-sectional view.
- Coil springs of the type described above having at least one hose element are used in the production of vehicles, in particular chassis of motor vehicles and / or rail vehicles.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Springs (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102018214795.7A DE102018214795A1 (de) | 2018-08-31 | 2018-08-31 | Schraubenfeder für ein Fahrwerk und ein Verfahren zum Herstellen einer Schraubenfeder für ein Fahrwerk |
| PCT/EP2019/072682 WO2020043651A1 (de) | 2018-08-31 | 2019-08-26 | Schraubenfeder für ein fahrwerk und ein verfahren zum herstellen einer schraubenfeder für ein fahrwerk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3844418A1 true EP3844418A1 (de) | 2021-07-07 |
Family
ID=67766171
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19758972.4A Withdrawn EP3844418A1 (de) | 2018-08-31 | 2019-08-26 | Schraubenfeder für ein fahrwerk und ein verfahren zum herstellen einer schraubenfeder für ein fahrwerk |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3844418A1 (de) |
| DE (1) | DE102018214795A1 (de) |
| WO (1) | WO2020043651A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7332560B2 (ja) * | 2020-09-25 | 2023-08-23 | トヨタ自動車株式会社 | リアサスペンションとそのコイルスプリング |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3711917A (en) * | 1969-08-18 | 1973-01-23 | North American Rockwell | Coated spring |
| JPH01120447A (ja) * | 1987-11-02 | 1989-05-12 | Nippon Steel Corp | 熱収縮性樹脂管被覆金属コイルばね |
| DE3737104A1 (de) * | 1987-11-02 | 1989-05-11 | Altenkirchener Kunststoff | Schlauchstueck aus elastischem, gut rueckstellbarem kunststoff und verfahren zu seiner herstellung |
| DE102007003782A1 (de) * | 2007-01-19 | 2008-07-31 | Muhr Und Bender Kg | Spaltfreie Federauflage |
| JP6063839B2 (ja) * | 2013-08-12 | 2017-01-18 | 日本発條株式会社 | 懸架装置用コイルばね |
| KR101715282B1 (ko) * | 2015-07-13 | 2017-03-16 | (주) 동양이화 | 코일스프링 보호튜브 및 그 제조방법 |
-
2018
- 2018-08-31 DE DE102018214795.7A patent/DE102018214795A1/de not_active Ceased
-
2019
- 2019-08-26 EP EP19758972.4A patent/EP3844418A1/de not_active Withdrawn
- 2019-08-26 WO PCT/EP2019/072682 patent/WO2020043651A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020043651A1 (de) | 2020-03-05 |
| DE102018214795A1 (de) | 2020-03-05 |
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