EP3717791A1 - Damping valve for a vibration damper - Google Patents

Damping valve for a vibration damper

Info

Publication number
EP3717791A1
EP3717791A1 EP18795976.2A EP18795976A EP3717791A1 EP 3717791 A1 EP3717791 A1 EP 3717791A1 EP 18795976 A EP18795976 A EP 18795976A EP 3717791 A1 EP3717791 A1 EP 3717791A1
Authority
EP
European Patent Office
Prior art keywords
spring
damping valve
coating
valve
elastomer coating
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Withdrawn
Application number
EP18795976.2A
Other languages
German (de)
French (fr)
Inventor
Aleksandar Knezevic
Jörg Rösseler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Publication of EP3717791A1 publication Critical patent/EP3717791A1/en
Withdrawn legal-status Critical Current

Links

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
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/348—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body
    • F16F9/3488—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body characterised by features intended to affect valve bias or pre-stress
    • 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
    • F16F3/00—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic
    • F16F3/08—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber
    • F16F3/10—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction
    • F16F3/12—Spring units consisting of several springs, e.g. for obtaining a desired spring characteristic with springs made of a material having high internal friction, e.g. rubber combined with springs made of steel or other material having low internal friction the steel spring being in contact with the rubber spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/3415—Special valve constructions; Shape or construction of throttling passages characterised by comprising plastics, elastomeric or porous elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/348—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body
    • F16F9/3484—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body characterised by features of the annular discs per se, singularly or in combination
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F9/00—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium
    • F16F9/32—Details
    • F16F9/34—Special valve constructions; Shape or construction of throttling passages
    • F16F9/348—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body
    • F16F9/3485—Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite directions or singly, e.g. annular discs positioned on top of the valve or piston body characterised by features of supporting elements intended to guide or limit the movement of the annular discs
    • 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
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0493—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with a spring other than a helicoidal spring
    • 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
    • F16F2224/00—Materials; Material properties
    • F16F2224/02—Materials; Material properties solids
    • F16F2224/0208—Alloys
    • 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
    • F16F2224/00—Materials; Material properties
    • F16F2224/02—Materials; Material properties solids
    • F16F2224/025—Elastomers

Definitions

  • the invention relates to a damping valve for a vibration damper according to the preamble of patent claim 1.
  • DE 10 2010 039 196 A1 describes a damping valve for a vibration damper, in which a star spring as a possible design of a flat springs is accompanied by a tilting disk, which influences the spring characteristic of the star spring. In a tilting disc with a larger diameter, a stiffening of the star spring takes place. In addition to a star feather plate springs are often used, which are also considered as flat springs.
  • damping valves in which the valve disk is relatively weakly biased with regard to a high level of ride comfort, tend to inherent vibrations.
  • the at least one valve disk is preloaded to a greater extent than would be necessary for a comfortable but still reliable suspension setting.
  • the object of the present invention is to minimize this comfort loss range of a damping valve.
  • the object is achieved by a contact area of the spring a
  • the spring can have an elastomer coating on both sides.
  • the double-sided elastomer coating can also be used for the elastomer coating on a first cover side of the damping valve to deviate from an elastomer coating of a second cover side in terms of the spring rate.
  • the Abhub characterizing the valve disc are influenced by the spring, which then rests after a certain travel with its second cover side on a second spring or on a support disk and then determines the second elastomer coating the further deformation path and thus the Abhub characterizing.
  • a disc spring known per se can be provided for the flat spring.
  • the flat spring is designed as a star spring with several spring arms.
  • the spring rate of the elastomeric coating of one spring arm of the star spring differs from the spring rate of the elastomeric coating of another spring arm. Then you reach support areas of the spring with a larger supporting force compared to support areas with a lower supporting force. Consequently, the valve disc will always define defined at the peripheral area, where the lowest supporting force is present. This also helps to avoid unwanted noise.
  • side edges of at least one spring arm also have an elastomer coating.
  • Fig. 1 shows a section of a vibration damper 1 with a damping medium-filled cylinder 3, in which a piston rod 5 is guided axially movable.
  • the piston rod 5 carries a piston 7 as Dämpfventilsko, the cylinder 3 in a piston rod-side and a piston rod remote working space 9; 1 1 divided.
  • the piston 7 has passage channels 13; 15 for separate flow directions of the damping medium due to a piston rod movement. Outlet openings of the passage channels 13 in a compression of the piston rod-side working space 9 are at least partially covered by a rigid valve disc 17 in conjunction with a helical compression spring 19. Frequently, a so-called pre-opening disc 21 is used.
  • this valve construction is only to be considered as an example.
  • valve disc 23 The outlet openings for the flow through the passageways in the opposite direction are at least partially covered by a valve disc 23.
  • the valve disc is made elastic and has a clamping portion 25 at the inner diameter.
  • a rigid valve disc can be used which lifts completely from a cover side of the Dämpfventil stressess or piston 7.
  • the valve disc 23 is biased by a flat spring in the design of a known plate spring 27 on a valve seat surface 29.
  • a rigid support disk 31 arranged above the disk spring 27 delimits the deformation path of the disk spring 27 during a lifting movement of the valve disk 23.
  • the support disk 31 has a profiling in the direction of the star spring 27, which is based on a clamping surface 33 with an outer tilting edge 35 extends radially outward.
  • the tilting edge 35 is followed by a bevel 37, which merges into a contact surface 39 for the plate spring 27.
  • the passage channel 15 in the piston 7, together with the valve disc and the plate spring 27, forms a damping valve 28 for a direction of movement of the piston 7.
  • a contact region of the disk spring 27 with the valve disk 23 has an elastomer coating, which in this case is designed on a first cover side 43 and on a second cover side 45.
  • the radial orientation of the elastomeric coating over the peripheral region may vary.
  • the coating height is designed unevenly over the circumference.
  • the elastomer coating 41 on the first cover page 43 may differ in terms of the spring rate of an elastomeric coating 41 of the second cover page 45.
  • the elastomer coating 41 and the plate spring 27 acts as two springs 41; 27 in a series connection. In comparison to a layered disc spring, however, a metallic contact between the valve disc 23 and the plate spring 27 is avoided. The same applies to the contact between the plate spring 27 and the support plate 31st Depending on the spring force characteristic curve, either the elastomer coating 41 is preloaded axially more strongly or the metallic core of the plate spring 27 is deformed. It is possible to achieve a soft basic setting of the diaphragm spring characteristic 27 without the valve disk 23 coming into resonance vibrations.
  • the flat spring is not limited to a plate spring but can also be designed in the form of a star spring 27 with a plurality of spring arms 47.
  • the spring arms 47 have a different geometry and are deflected independently. Furthermore, there is the possibility that the spring rate of the elastomer coating 41 of one spring arm 47 of the star spring 27 differs from the spring rate of the elastomer coating 41 of another spring arm 47. The difference can be z. B. are also in the selection of materials. The other parameters have already been enumerated in connection with the plate spring.
  • FIG. 4 is intended to show that side edges 49 of at least one spring arm 47 can also have an elastomer coating 41. By means of the side edge 49, it is easier to support a load of the elastomer coating 41 in the circumferential direction.
  • the spring arm 47 may have a recess 51 for receiving elastomer material, in order to achieve a positive connection in addition to a positive connection with the star spring. In Fig. 5, such a positive connection 53 is shown in section.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Fluid-Damping Devices (AREA)

Abstract

The invention relates to a damping valve for a vibration damper, comprising a damping valve body (7) having at least one passage channel (13; 15), which is at least partly covered by at least one valve disk (23), wherein the valve disk (23) is preloaded onto a valve seat surface (29) by a planar spring (27), and a contact region of the spring (27) has an elastomer coating (41).

Description

Dämpfventil für einen Schwinqungsdämpfer  Damping valve for a vibration damper
Die Erfindung betrifft ein Dämpfventil für einen Schwingungsdämpfer gemäß dem Oberbegriff von Patentanspruch 1 . The invention relates to a damping valve for a vibration damper according to the preamble of patent claim 1.
Die DE 10 2010 039 196 A1 beschreibt ein Dämpfventil für einen Schwingungs- dämpfer, bei dem einer Sternfeder als eine mögliche Bauform einer flächigen Federn eine Kippscheibe beigefügt ist, die die Federcharakteristik der Sternfeder beeinflusst. Bei einer Kippscheibe mit einem größeren Durchmesser findet eine Versteifung der Sternfeder statt. Neben einer Sternfeder kommen häufig Tellerfedern zur Anwendung, die ebenfalls als flächige Federn anzusehen sind. DE 10 2010 039 196 A1 describes a damping valve for a vibration damper, in which a star spring as a possible design of a flat springs is accompanied by a tilting disk, which influences the spring characteristic of the star spring. In a tilting disc with a larger diameter, a stiffening of the star spring takes place. In addition to a star feather plate springs are often used, which are also considered as flat springs.
In der DE 10 2015 206 022 A1 wird ein anderer Weg beschritten, um das Abhubver- halten einer Ventilscheibe zu beeinflussen. Es werden Elastomerelemente eingesetzt, die von einer starren Stützscheibe gehalten werden. Die Ventilscheibe selbst ist als eine einfache Metallscheibe aus Federstahl gefertigt. In DE 10 2015 206 022 A1 a different approach is taken to influence the Abhubver- hold a valve disc. Elastomer elements are used, which are held by a rigid support disk. The valve disc itself is made as a simple metal disc made of spring steel.
Grundsätzlich neigen Dämpfventile, bei denen die Ventilscheibe im Hinblick auf einen hohen Fahrkomfort relativ schwach vorgespannt ist, zu Eigenschwingungen. Um die- se Eigenschwingungen zu vermeiden, wird die mindestens eine Ventilscheibe stärker vorgespannt als es für eine komfortable aber immer noch sichere Fahrwerkseinstel- lung notwendig wäre. In principle, damping valves, in which the valve disk is relatively weakly biased with regard to a high level of ride comfort, tend to inherent vibrations. In order to avoid these natural vibrations, the at least one valve disk is preloaded to a greater extent than would be necessary for a comfortable but still reliable suspension setting.
Die Aufgabe der vorliegenden Erfindung besteht darin, diesen Komfortverlustbereich eines Dämpfventils zu minimieren. The object of the present invention is to minimize this comfort loss range of a damping valve.
Die Aufgabe wird dadurch gelöst, indem ein Kontaktbereich der Feder eine The object is achieved by a contact area of the spring a
Elastomerbeschichtung aufweist. Having elastomer coating.
Mittels der Elastomerbeschichtung der flächigen Feder findet eine Resonanzverschiebung statt, bei der eine Abhubbewegung der Ventilscheibe schon bei niederfre- quenten Anregungen auf den Schwingungsdämpfer möglich ist, ohne dass störende Geräusche auftreten. Im Hinblick auf eine einfache und vertauschungssichere Montage kann die Feder beidseitig eine Elastomerbeschichtung aufweisen. Die beidseitige Elastomerbe- schichtung kann jedoch auch dafür genutzt werden, dass die Elastomerbeschichtung auf einer ersten Deckseite des Dämpfventils hinsichtlich der Federrate von einer Elastomerbeschichtung einer zweiten Deckseite abweicht. Mit einer derartigen Beschichtungsanordnung kann z. B. die Abhubcharakteristik der Ventilscheibe über die Feder beeinflusst werden, die dann nach einem bestimmten Federweg mit ihrer zweiten Deckseite an einer zweiten Feder oder an einer Stützscheibe anliegt und dann die zweite Elastomerbeschichtung den weiteren Verformungsweg und damit die Abhubcharakteristik bestimmt. By means of the elastomer coating of the flat spring, a resonant displacement takes place in which a lift-off movement of the valve disc is possible even with low-frequency excitations on the vibration damper, without disturbing noises occurring. With regard to a simple and secure insertion, the spring can have an elastomer coating on both sides. However, the double-sided elastomer coating can also be used for the elastomer coating on a first cover side of the damping valve to deviate from an elastomer coating of a second cover side in terms of the spring rate. With such a coating arrangement can, for. B. the Abhubcharakteristik the valve disc are influenced by the spring, which then rests after a certain travel with its second cover side on a second spring or on a support disk and then determines the second elastomer coating the further deformation path and thus the Abhubcharakteristik.
Grundsätzlich kann für die flächige Feder eine an sich bekannte Tellerfeder vorgesehen sein. Bevorzugt ist die flächige Feder als eine Sternfeder mit mehreren Federar- men ausgeführt ist. In principle, a disc spring known per se can be provided for the flat spring. Preferably, the flat spring is designed as a star spring with several spring arms.
Man kann nicht nur die Federrate bezogen auf eine Deckseite der Federn variieren, sondern auch vorsehen, dass sich die Federrate der Elastomerbeschichtung eines Federarms der Sternfeder von der Federrate der Elastomerbeschichtung eines anderen Federarms unterscheidet. Dann erreicht man Abstützbereiche der Feder mit einer größeren Stützkraft im Vergleich zu Abstützbereiche mit einer geringeren Stützkraft. Folglich wird die Ventilscheibe definiert stets an dem Umfangbereich abheben, bei dem die geringste Stützkraft vorliegt. Auch damit lassen sich unerwünschte Geräu- sche vermeiden. Not only can the spring rate vary with respect to a top side of the springs, but also provide that the spring rate of the elastomeric coating of one spring arm of the star spring differs from the spring rate of the elastomeric coating of another spring arm. Then you reach support areas of the spring with a larger supporting force compared to support areas with a lower supporting force. Consequently, the valve disc will always define defined at the peripheral area, where the lowest supporting force is present. This also helps to avoid unwanted noise.
Im Hinblick auf die Dauerhaltbarkeit der Elastomerbeschichtung weisen auch Seitenkanten zumindest eines Federarms eine Elastomerbeschichtung auf. With regard to the durability of the elastomer coating, side edges of at least one spring arm also have an elastomer coating.
Zusätzlich kann der Federarm zu besseren Fixierung der Elastomerbeschichtung eine Aussparung zur Aufnahme von Elastomerwerkstoff aufweisen. Die Fig. 1 zeigt einen Ausschnitt aus einem Schwingungsdämpfer 1 mit einem dämpfmediumgefüllten Zylinder 3, in dem eine Kolbenstange 5 axial beweglich ge- führt ist. Die Kolbenstange 5 trägt einen Kolben 7 als Dämpfventilkörper, der den Zy- linder 3 in einen kolbenstangenseitigen und einen kolbenstangenfernen Arbeitsraum 9; 1 1 unterteilt. In addition, the spring arm may have a recess for receiving elastomer material for better fixation of the elastomer coating. Fig. 1 shows a section of a vibration damper 1 with a damping medium-filled cylinder 3, in which a piston rod 5 is guided axially movable. The piston rod 5 carries a piston 7 as Dämpfventilkörper, the cylinder 3 in a piston rod-side and a piston rod remote working space 9; 1 1 divided.
Der Kolben 7 verfügt über Durchtrittskanäle 13; 15 für getrennte Durchströmungsrich- tungen des Dämpfmediums infolge einer Kolbenstangenbewegung. Austrittsöffnungen der Durchtrittskanäle 13 bei einer Kompression des kolbenstangenseitigen Arbeitsraums 9 werden von einer starren Ventilscheibe 17 in Verbindung mit einer Schraubendruckfeder 19 zumindest teilweise abgedeckt. Häufig kommt eine so genannte Voröffnungsscheibe 21 zur Anwendung. Diese Ventilkonstruktion ist jedoch nur beispielhaft anzusehen. The piston 7 has passage channels 13; 15 for separate flow directions of the damping medium due to a piston rod movement. Outlet openings of the passage channels 13 in a compression of the piston rod-side working space 9 are at least partially covered by a rigid valve disc 17 in conjunction with a helical compression spring 19. Frequently, a so-called pre-opening disc 21 is used. However, this valve construction is only to be considered as an example.
Die Austrittsöffnungen für die Durchströmung der Durchtrittskanäle in Gegenrichtung werden von einer Ventilscheibe 23 zumindest teilweise abgedeckt. In diesem Beispiel ist die Ventilscheibe elastisch ausgeführt und verfügt über einen Spannbereich 25 am Innendurchmesser. Alternativ kann auch eine starre Ventilscheibe verwendet werden, die vollständig von einer Deckseite des Dämpfventilkörpers bzw. Kolbens 7 abhebt. The outlet openings for the flow through the passageways in the opposite direction are at least partially covered by a valve disc 23. In this example, the valve disc is made elastic and has a clamping portion 25 at the inner diameter. Alternatively, a rigid valve disc can be used which lifts completely from a cover side of the Dämpfventilkörpers or piston 7.
Die Ventilscheibe 23 wird von einer flächigen Feder in der Bauform einer an sich be- kannten Tellerfeder 27 auf eine Ventilsitzfläche 29 vorgespannt. Eine oberhalb der Tellerfeder 27 angeordnete starre Stützscheibe 31 begrenzt den Verformungsweg der Tellerfeder 27 bei einer Abhubbewegung der Ventilscheibe 23. Dafür verfügt die Stützscheibe 31 in Richtung der Sternfeder 27 über eine Profilierung, die sich ausge- hend von einer Spannfläche 33 mit einer äußeren Kippkante 35 nach radial außen erstreckt. Der Kippkante 35 schließt sich eine Schräge 37 an, die in eine Anlagefläche 39 für die Tellerfeder 27 übergeht. Der Durchtrittskanal 15 im Kolben 7 bildet zu- sammen mit der Ventilscheibe und der Tellerfeder 27 ein Dämpfventil 28 für eine Bewegungsrichtung des Kolbens 7. Des Weiteren weist ein Kontaktbereich der Tellerfeder 27 mit der Ventilscheibe 23 eine Elastomerbeschichtung auf, die in diesem Fall auf einer ersten Deckseite 43 und auf einer zweiten Deckseite 45 ausgeführt ist. Wie ein Vergleich des linken und des rechten Schnittbereichs der Tellerfeder 27 zeigt, kann die radiale Ausrichtung der Elastomerbeschichtung über den Umfangsbereich variieren. Ebenso kann man die Formgebung oder z. B. die Beschichtungsöhe über den Umfang ungleichmäßig ge- stalten. The valve disc 23 is biased by a flat spring in the design of a known plate spring 27 on a valve seat surface 29. A rigid support disk 31 arranged above the disk spring 27 delimits the deformation path of the disk spring 27 during a lifting movement of the valve disk 23. For this purpose, the support disk 31 has a profiling in the direction of the star spring 27, which is based on a clamping surface 33 with an outer tilting edge 35 extends radially outward. The tilting edge 35 is followed by a bevel 37, which merges into a contact surface 39 for the plate spring 27. The passage channel 15 in the piston 7, together with the valve disc and the plate spring 27, forms a damping valve 28 for a direction of movement of the piston 7. Furthermore, a contact region of the disk spring 27 with the valve disk 23 has an elastomer coating, which in this case is designed on a first cover side 43 and on a second cover side 45. As a comparison of the left and right section of the disc spring 27 shows, the radial orientation of the elastomeric coating over the peripheral region may vary. Likewise, you can the shape or z. For example, the coating height is designed unevenly over the circumference.
Wie der Detailausschnitt nach Fig. 2 zeigt, kann die Elastomerbeschichtung 41 auf der ersten Deckseite 43 hinsichtlich der Federrate von einer Elastomerbeschichtung 41 der zweiten Deckseite 45 abweichen. As the detail of Fig. 2 shows, the elastomer coating 41 on the first cover page 43 may differ in terms of the spring rate of an elastomeric coating 41 of the second cover page 45.
Bei einer Abhubbewegung der Ventilscheibe 23 wirkt die Elastomerbeschichtung 41 und die Tellerfeder 27 wie zwei Federn 41 ; 27 in einer Reihenschaltung. Im Vergleich zu einer geschichteten Tellerfeder wird jedoch ein metallischer Kontakt zwischen der Ventilscheibe 23 und der Tellerfeder 27 vermieden. Gleiches gilt für den Kontakt zwischen der Tellerfeder 27 und der Stützscheibe 31 . Je nach Federkraftkennlinie wird entweder erst die Elastomerbeschichtung 41 axial stärker vorgespannt oder der der metallische Kern der Tellerfeder 27 verformt. Es lässt sich eine weiche Grundeinstellung der Tellerfederkennlinie 27 erreichen, ohne dass die Ventilscheibe 23 in Resonanzschwingungen gerät. In a Abhubbewegung the valve disc 23, the elastomer coating 41 and the plate spring 27 acts as two springs 41; 27 in a series connection. In comparison to a layered disc spring, however, a metallic contact between the valve disc 23 and the plate spring 27 is avoided. The same applies to the contact between the plate spring 27 and the support plate 31st Depending on the spring force characteristic curve, either the elastomer coating 41 is preloaded axially more strongly or the metallic core of the plate spring 27 is deformed. It is possible to achieve a soft basic setting of the diaphragm spring characteristic 27 without the valve disk 23 coming into resonance vibrations.
Wenn die Tellerfeder 27 mit ihrer Oberseite bzw. der zweiten Deckseite 45 an die Stützscheibe 31 schlägt, dann kann ebenfalls kein Anschlaggeräusch auftreten und die Abstützkraft setzt nicht schlagartig ein, sondern steigt abhängig von der Geometrie der Elastomerbeschichtung 41 . If the disk spring 27 strikes against the support disk 31 with its upper side or the second cover side 45, then likewise no impact noise can occur and the support force does not abruptly but increases depending on the geometry of the elastomer coating 41.
Mit der Fig. 3 soll dargestellt werden, dass die flächige Feder nicht auf eine Tellerfe- derbeschränkt ist, sondern auch in der Form einer Sternfeder 27 mit mehreren Federarmen 47 ausgeführt sein kann. It is to be illustrated with FIG. 3 that the flat spring is not limited to a plate spring but can also be designed in the form of a star spring 27 with a plurality of spring arms 47.
Mit einer Sternfeder 27 kann man noch kleinere Schließkräfte realisieren und durch die Trennung des Federvolumens in mehrere Federarme 47, können die Federarme 47 eine unterschiedliche Geometrie aufweisen und unabhängig voneinander ausgelenkt werden. Des Weiteren besteht die Möglichkeit, dass sich die Federrate der Elastomerbeschichtung 41 eines Federarms 47 der Sternfeder 27 von der Federrate der Elastomerbeschichtung 41 eines anderen Federarms 47 unterscheidet. Der Unterschied kann z. B. auch in der Materialauswahl liegen. Die weiteren Parameter wurden bereits im Zusammenhang mit der Tellerfeder beispielhaft aufgezählt. With a star spring 27 you can realize even smaller closing forces and by the separation of the spring volume in a plurality of spring arms 47, the spring arms 47 have a different geometry and are deflected independently. Furthermore, there is the possibility that the spring rate of the elastomer coating 41 of one spring arm 47 of the star spring 27 differs from the spring rate of the elastomer coating 41 of another spring arm 47. The difference can be z. B. are also in the selection of materials. The other parameters have already been enumerated in connection with the plate spring.
Mit der Fig. 4 soll darauf gezeigt werden, dass auch Seitenkanten 49 zumindest ei- nes Federarms 47 eine Elastomerbeschichtung 41 aufweisen können. Über die Sei- tenkante 49 lässt sich eine Belastung der Elastomerbeschichtung 41 in Umfangsrichtung leichter abstützen. Zusätzlich kann der Federarm 47 eine Aussparung 51 zur Aufnahme von Elastomerwerkstoff aufweisen, um neben einer stoffschlüssigen Ver- bindung auch eine formschlüssige Verbindung mit der Sternfeder zu erreichen. In der Fig. 5 ist ein derartige Formschlussverbindung 53 im Schnitt dargestellt. FIG. 4 is intended to show that side edges 49 of at least one spring arm 47 can also have an elastomer coating 41. By means of the side edge 49, it is easier to support a load of the elastomer coating 41 in the circumferential direction. In addition, the spring arm 47 may have a recess 51 for receiving elastomer material, in order to achieve a positive connection in addition to a positive connection with the star spring. In Fig. 5, such a positive connection 53 is shown in section.
Bezuaszeichen Schwingungsdämpfer Bezuaszeichen vibration damper
Zylinder  cylinder
Kolbenstange  piston rod
Kolben  piston
kolbenstangenseitiger Arbeitsraum kolbenstangenferner Arbeitsraum piston rod side working space piston rod far work space
; 15 Durchtrittskanäle ; 15 passageways
Ventilscheibe  valve disc
Schraubendruckfeder  Helical compression spring
Voröffnungsscheibe  Voröffnungsscheibe
Ventilscheibe  valve disc
Spannbereich  clamping range
Sternfeder  star Washer
Dämpfventil  damping valve
Ventilsitzfläche  Valve seat
Stützscheibe  support disc
Spannfläche  clamping surface
Kippkante  tilting edge
Schräge  slope
Anlagefläche  contact surface
Elastomerbeschichtung  elastomer coating
erste Deckseite  first cover page
zweite Deckseite  second cover page
Federarm  spring arm
Seitenkante  side edge
Aussparung  recess
Formschlussverbindung  Positive connection

Claims

Patentansprüche claims
1 . Dämpfventil für einen Schwingungsdämpfer, umfassend einen Dämpfventilkörper (7) mit mindestens einem Durchtrittskanal (13; 15), der von mindestens einer Ventilscheibe (23) zumindest teilweise abgedeckt wird, wobei die Ventilscheibe (23) von einer flächigen Feder (27) auf eine Ventilsitzfläche (29) vorgespannt wird, dadurch gekennzeichnet, dass ein Kontaktbereich der Feder (27) eine Elastomerbeschichtung (41 ) aufweist. 1 . A damping valve for a vibration damper, comprising a damper valve body (7) with at least one passage (13; 15) at least partially covered by at least one valve disc (23), the valve disc (23) extending from a flat spring (27) to a valve seat surface (29) is biased, characterized in that a contact region of the spring (27) has an elastomer coating (41).
2. Dämpfventil nach Anspruch 1 , dadurch gekennzeichnet, dass die Feder (27) beidseitig eine Elastomerbeschichtung (41 ) aufweist. 2. damping valve according to claim 1, characterized in that the spring (27) on both sides of an elastomer coating (41).
3. Dämpfventil nach Anspruch 2, dadurch gekennzeichnet, dass die Elastomerbeschichtung (41 ) auf einer ersten Deckseite (43) hinsichtlich der Federrate von einer Elastomerbeschichtung (41 ) einer zweiten Deckseite (45) abweicht. 3. Damping valve according to claim 2, characterized in that the elastomer coating (41) on a first cover side (43) with respect to the spring rate of an elastomeric coating (41) a second cover side (45) deviates.
4. Dämpfventil nach Anspruch 1 , dadurch gekennzeichnet, dass die flächige Feder (27) als eine Sternfeder mit mehreren Federarmen (47) ausgeführt ist. 4. damping valve according to claim 1, characterized in that the flat spring (27) is designed as a star spring with a plurality of spring arms (47).
5. Dämpfventil nach Anspruch 4, dadurch gekennzeichnet, dass sich die Federrate der Elastomerbeschichtung (41 ) eines Federarms (47) der Sternfeder (27) von der Federrate der Elastomerbeschichtung (41 ) eines anderen Federarms (47) unter- scheidet. 5. Damping valve according to claim 4, characterized in that the spring rate of the elastomeric coating (41) of a spring arm (47) of the star spring (27) from the spring rate of the elastomeric coating (41) of another spring arm (47) differs.
6. Dämpfventil nach Anspruch 4, dadurch gekennzeichnet, dass Seitenkanten (49) zumindest eines Federarms (47) eine Elastomerbeschichtung (41 ) aufweisen. 6. Damping valve according to claim 4, characterized in that side edges (49) of at least one spring arm (47) have an elastomer coating (41).
7. Dämpfventil nach Anspruch 4, dadurch gekennzeichnet, dass der Federarm (47) eine Aussparung (51 ) zur Aufnahme von Elastomerwerkstoff aufweist. 7. damping valve according to claim 4, characterized in that the spring arm (47) has a recess (51) for receiving elastomer material.
EP18795976.2A 2017-11-27 2018-10-25 Damping valve for a vibration damper Withdrawn EP3717791A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102017221122.9A DE102017221122B4 (en) 2017-11-27 2017-11-27 Damping valve for a vibration damper
PCT/EP2018/079254 WO2019101465A1 (en) 2017-11-27 2018-10-25 Damping valve for a vibration damper

Publications (1)

Publication Number Publication Date
EP3717791A1 true EP3717791A1 (en) 2020-10-07

Family

ID=64051545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18795976.2A Withdrawn EP3717791A1 (en) 2017-11-27 2018-10-25 Damping valve for a vibration damper

Country Status (7)

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US (1) US20200362934A1 (en)
EP (1) EP3717791A1 (en)
JP (1) JP2021504638A (en)
KR (1) KR20200090217A (en)
CN (1) CN111630294A (en)
DE (1) DE102017221122B4 (en)
WO (1) WO2019101465A1 (en)

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1713071U (en) * 1955-10-10 1955-12-15 Hemscheidt Maschf Hermann HYDRAULIC TELESCOPIC SHOCK ABSORBER.
US3621951A (en) * 1968-12-30 1971-11-23 Leopold Franz Schmid Throttle valve
JPS5921283Y2 (en) * 1979-04-23 1984-06-22 株式会社 昭和製作所 Hydraulic cylinder for inboard and outboard motors
JPH0335341U (en) * 1989-08-14 1991-04-05
DE4034330A1 (en) * 1990-10-29 1992-04-30 Elster Produktion Gmbh Flat steel plate seal with inner and outer rings - has peripheral profiling and deformable elastomeric coating on both sides
US5282645A (en) * 1992-11-25 1994-02-01 General Motors Corporation Electro-hydraulic pressure regulating valve assembly mounted in a valve boss on a hydraulic damper
DE4441047C1 (en) * 1994-11-18 1996-01-18 Bilstein August Gmbh Co Kg Proportional valve for hydraulic shock absorber
JPH09291964A (en) * 1996-04-26 1997-11-11 Kayaba Ind Co Ltd Damping valve for hydraulic shock absorber
JP2002266924A (en) * 2001-03-13 2002-09-18 Kayaba Ind Co Ltd Damping valve part structure
CN2934743Y (en) * 2006-07-21 2007-08-15 万向钱潮股份有限公司 Absorber piston valve employing a claw type spring sheet
DE102007005288B4 (en) * 2007-02-02 2013-09-12 Thyssenkrupp Bilstein Gmbh Hydraulic vibration damper
DE102009054122A1 (en) * 2009-11-20 2011-05-26 Volkswagen Ag damper valve
DE102010039196B4 (en) * 2010-08-11 2012-06-14 Zf Friedrichshafen Ag Damping valve for a vibration damper
JP5923323B2 (en) * 2012-01-31 2016-05-24 日立オートモティブシステムズ株式会社 Cylinder device
DE102015206022A1 (en) * 2015-04-02 2016-10-06 Zf Friedrichshafen Ag Damping valve for a vibration damper
DE102016221659B4 (en) * 2016-11-04 2022-07-07 Zf Friedrichshafen Ag Damping valve for a vibration damper

Also Published As

Publication number Publication date
DE102017221122B4 (en) 2021-03-18
CN111630294A (en) 2020-09-04
JP2021504638A (en) 2021-02-15
US20200362934A1 (en) 2020-11-19
DE102017221122A1 (en) 2019-05-29
WO2019101465A1 (en) 2019-05-31
KR20200090217A (en) 2020-07-28

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