EP3717791A1 - Damping valve for a vibration damper - Google Patents
Damping valve for a vibration damperInfo
- 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- Withdrawn
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
Description
Claims
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)
Country | Link |
---|---|
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)
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 |
-
2017
- 2017-11-27 DE DE102017221122.9A patent/DE102017221122B4/en active Active
-
2018
- 2018-10-25 EP EP18795976.2A patent/EP3717791A1/en not_active Withdrawn
- 2018-10-25 WO PCT/EP2018/079254 patent/WO2019101465A1/en unknown
- 2018-10-25 KR KR1020207017975A patent/KR20200090217A/en not_active Application Discontinuation
- 2018-10-25 JP JP2020528023A patent/JP2021504638A/en active Pending
- 2018-10-25 US US16/766,515 patent/US20200362934A1/en not_active Abandoned
- 2018-10-25 CN CN201880076766.4A patent/CN111630294A/en active Pending
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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Legal Events
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DAV | Request for validation of the european patent (deleted) | ||
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18D | Application deemed to be withdrawn |
Effective date: 20210119 |