WO2007124923A1 - Federdämpfer für ein kraftfahrzeug - Google Patents
Federdämpfer für ein kraftfahrzeug Download PDFInfo
- Publication number
- WO2007124923A1 WO2007124923A1 PCT/EP2007/003734 EP2007003734W WO2007124923A1 WO 2007124923 A1 WO2007124923 A1 WO 2007124923A1 EP 2007003734 W EP2007003734 W EP 2007003734W WO 2007124923 A1 WO2007124923 A1 WO 2007124923A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- spring damper
- housing part
- rolling
- volume
- motor vehicle
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G11/00—Resilient suspensions characterised by arrangement, location or kind of springs
- B60G11/26—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs
- B60G11/27—Resilient suspensions characterised by arrangement, location or kind of springs having fluid springs only, e.g. hydropneumatic springs wherein the fluid is a gas
-
- 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
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
- F16F9/049—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall multi-chamber units
-
- 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
- F16F9/02—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum
- F16F9/04—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall
- F16F9/05—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type
- F16F9/055—Springs, vibration-dampers, shock-absorbers, or similarly-constructed movement-dampers using a fluid or the equivalent as damping medium using gas only or vacuum in a chamber with a flexible wall the flexible wall being of the rolling diaphragm type having a double diaphragm construction
-
- 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
- F16F9/44—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction
- F16F9/46—Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction allowing control from a distance, i.e. location of means for control input being remote from site of valves, e.g. on damper external wall
- F16F9/466—Throttling control, i.e. regulation of flow passage geometry
-
- 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
- F16F9/58—Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder
- F16F9/585—Stroke limiting stops, e.g. arranged on the piston rod outside the cylinder within the cylinder, in contact with working fluid
-
- 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
- B60G2202/20—Type of damper
- B60G2202/24—Fluid damper
- B60G2202/242—Pneumatic damper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/40—Auxiliary suspension parts; Adjustment of suspensions
- B60G2204/45—Stops limiting travel
- B60G2204/4502—Stops limiting travel using resilient buffer
-
- 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
- B60G2206/424—Plunger or top retainer construction for bellows or rolling lobe type air springs
Definitions
- the invention relates to a spring damper, in particular a pneumatic spring damper for a motor vehicle, with a first housing part and a second housing part, wherein the first housing part via a first rolling bellows with the second housing part a first variable volume and the second housing part via a second rolling bellows with a connected to the first housing part rolling piston forms a second variable volume, wherein the two rolling bellows are arranged such that they are guided during rolling by outer contours of the two housing parts and the rolling piston in the radial direction, wherein the two volumes communicate with each other via a throttle element and form a hermetically sealed two-volume system with respect to a deflection of the spring damper.
- the first air spring has a first downwardly open bell-shaped housing, which is connected via a first rolling bellows with a second downwardly open bell-shaped housing. Furthermore, a rolling piston is present, which projects into the lower opening of the second bell-shaped housing and a second rolling bellows with the second bell-shaped housing forms the second air spring.
- the rolling bellows are arranged such that they are guided during rolling by outer contours of the two bell-shaped housing and the rolling piston in the radial direction.
- the rolling piston is connected by using an I-shaped connecting element which engages around the spring damper from the outside, with the first bell-shaped housing.
- the disadvantage is that the I-shaped connecting element claimed additional space in the outer space of the spring damper, therefore, therefore, a use of the known spring damper in cramped body conditions can cause problems. Since the second housing is open to the road surface, at the same time a seal against unwanted contamination is difficult.
- the spring damper has a first housing part and a second housing part, wherein the first housing part via a first rolling bellows with the second housing part a first variable volume and the second housing part via a second rolling bellows with a connected to the first housing part rolling piston forms a second variable volume, wherein the two rolling bellows are arranged such that they are guided during rolling by outer contours of the two housing parts and the rolling piston in the radial direction, wherein the two volumes via a throttle element communicate with each other and form a hermetically sealed two-volume system with respect to a deflection of the spring damper.
- the spring damper according to the invention comprises exactly two volumes as well as a differential rolling bellows formed by the two associated rolling bellows. Such an arrangement is characterized by a particularly good damping effect with high load capacity.
- the rolling piston is guided longitudinally displaceably by means of a sealing element through the second housing part. Since the rolling piston runs inside the spring damper, it is possible to create a structurally compact, completely enclosed spring damper. The closed design ensures a reliable seal against unwanted contamination.
- the spring damper is operated, for example, with pressure medium from a pressure medium supply present in the motor vehicle, typically by means of compressed air from a compressed-air storage or the like.
- the throttle element is arranged outside of the spring damper, so that can be increased by the improved heat exchange with the environment, the thermal load capacity of the spring damper. This is especially important when driving on rough roads.
- the throttle element is part of the rolling piston.
- the throttle element is then arranged inside the spring damper.
- the rolling piston has a passage channel connecting the first and second volumes, at the inlet or outlet opening of which the throttle element is seated.
- the flow resistance of the throttle element may be electrically adjustable, in particular by means of an associated valve unit, so that an active adaptation of the damping force characteristic of the spring damper to different driving conditions or road conditions is possible.
- the spring damper is part of an active suspension located in the motor vehicle.
- the motor vehicle does not have an active chassis, it may alternatively also be a passive throttle element without electrical adjustment.
- the sealing element is mounted so as to be radially displaceable in a bush arranged on the second housing part.
- the sealing element consists for example of polytetrafluoroethylene (PTFE or Teflon) or a similar temperature-resistant material with a low coefficient of friction.
- a stop buffer for limiting the deflection of the spring damper within the first and / or second volume is arranged.
- the stop buffer serves in this case at the same time as a volume strainer, which allows by appropriate specification of its volume and its compressibility targeted interference with the spring force and / or damping force - characteristic of the spring damper.
- the first and second rolling bellows are preferably mounted in a radial gap formed by the first and second housing part and the rolling piston, it being advantageous to compensate sufficiently high bending moments, if the greatest possible distance between the two rolling bellows is provided ,
- the two housing parts or the rolling piston cooperate with the first and second rolling bellows in such a way that, when the spring damper deflects, one of the two volumes decreases, while the other volume increases.
- the mutual change in volume comparatively high flow velocities occur even in the case of low damper amplitudes in the throttle element or in the throttle gap. In this way, a sufficient damping effect is ensured even with small deflections of the spring damper.
- the first housing part is connected to the body of the motor vehicle via a flexible head bearing.
- the head bearing is designed for example as an elastomeric bearing or as a ball joint.
- On the side facing the wheel carrier side of the spring damper may also be provided a gimbal soft elastomeric bearing or a corresponding ball joint.
- FIG. 1 shows a first embodiment of the spring damper according to the invention with a arranged outside the spring damper throttle element
- FIG. 2 shows a second embodiment of the spring damper according to the invention, in which the throttle element is arranged as part of a rolling piston in the region of a first volume of the spring damper,
- FIG 3 shows a third embodiment of the spring damper according to the invention, in which the throttle element is arranged as part of the rolling piston in the region of a second volume of the spring damper,
- Fig. 4 shows a fourth embodiment of the spring damper according to the invention, in which a plurality of plain bearings are provided for limiting a bending moment acting on the spring damper.
- Fig. 1 shows a first embodiment of the spring damper according to the invention for a motor vehicle, wherein the spring damper 10 is operated with pressure medium from a pressure medium supply located in the motor vehicle.
- the spring damper 10 has a first housing part 11 and a second housing part 12, wherein the first housing part 11 via a first rolling bellows 13 with the second housing part 12, a first variable volume V 1 and the second housing part 12 via a second rolling bellows 14 with a with first housing part 11 connected rolling piston 15 a second variable volume V 2 forms, wherein the two rolling bellows 13 and 14 are arranged such that they are guided during rolling by outer contours of the two housing parts 11 and 12 and the rolling piston 15 in the radial direction, wherein the two volumes V 1 and V 2 via a Throttle element 20 communicate with each other and form a hermetically sealed two-volume system with respect to a deflection of the spring damper 10.
- the two housing parts 11 and 12 and the rolling piston 15 cooperate with the first and second rolling bellows 13 and 14 in such a way that one deflection of the spring damper 10 reduces one of the two volumes V 1 and V 2 , while the other volume V 2 and V 1 increased.
- the rolling piston 15 is in this case by means of a volume V 1 and V 2 separated from each other sealing element 21 longitudinally slidably passed through the wall of the second housing part 12.
- a first or second stop buffer 22 or 23 is provided for each of the two possible directions of movement.
- the first stop buffer 22 is arranged within the second volume V 2 .
- the second stop buffer 23 is arranged in the first volume V 1 .
- Typical values are R 1 "60 mm and R 2 " 47.5 mm.
- the first rolling bellows 13 is mounted in a first radial gap 24 formed by the first housing part 11 and the second housing part 12 and the second rolling bellows 14 in a second radial gap 25 formed by the second housing part 12 and the rolling piston 15.
- the throttle element 20 is disposed outside of the spring damper 10, wherein the flow resistance of the throttle element 20 is adjustable by means of an associated valve unit via an electrical control line 30 as part of an active chassis located in the motor vehicle.
- the sealing element 21 is an annular sealing disc which is mounted so as to be radially displaceable in a bush 31 arranged on the second housing part 12 in order to compensate possible transverse movements of the rolling piston 15.
- the sealing element 21 itself consists of polytetrafluoroethylene (PTFE or Teflon) or a similar temperature-resistant material with a low coefficient of friction.
- the spring damper 10 is arranged between a supporting body assigned to the body of the motor vehicle and a wheel carrier. In the case of a four-wheeled motor vehicle, therefore, a total of four spring damper 10 are provided, which are each connected via a flexible head bearing 32 to the body.
- the head bearing 32 is, for example, an elastomeric bearing or a ball joint.
- a cardan soft elastomer bearing or a corresponding ball joint is also provided.
- FIG. 2 shows a second embodiment of the spring damper according to the invention for a motor vehicle, which differs from the spring damper shown in FIG. 1 in that the throttle element 20 is a structural component of the rolling piston 15.
- the rolling piston 15 has a passage 33 which connects the first and second volumes V 1 and V 2 , the throttle element 20 being seated at its inlet or outlet opening in the region of the first volume V 1 .
- 3 shows a third embodiment of the spring damper according to the invention. This differs from the embodiment shown in FIG. 2 only by the arrangement of the throttle element 20, which is in the present case in the region of the second volume V 2 . Due to the "nested" arrangement of the same direction oriented Roil- bellows 13 and 14, the illustrated spring damper 10 has a particularly compact design.
- FIG. 4 shows a fourth embodiment of the spring damper according to the invention, which differs from the embodiment shown in FIG. 3 in that the rolling piston 15 is supported by means of additional slide bearings 40 and 41 relative to the second housing part 12 such that a bending moment acting on the spring damper 10 is limited to uncritical values.
- the first sliding bearing 40 is located in the region of the bush 31, whereas the second sliding bearing 41 is arranged at a distance from the first sliding bearing 40 on an extension piece 42 formed on the rolling piston 15, which by means of the second sliding bearing 41 within a supporting leg connected to the second housing part 12 43 is guided longitudinally displaceable.
- the bearing clearance of the plain bearings 40 and 41 designed as sliding bushings is dimensioned such that under normal operating conditions in which no excessive bending moment occurs between the first housing part 11 and the second housing part 12, a frictional contact between the first sliding bearing 40 and the outside of the rolling piston 15 or The second slide bearing 41 and the inside of the support leg 43 is excluded. That the two plain bearings 40 and 41 are without effect under normal operating conditions, so have no (adverse) influence on the response of the spring damper 10 in such circumstances.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009506993A JP2009535571A (ja) | 2006-04-29 | 2007-04-27 | 自動車用のバネ緩衝装置 |
US12/298,890 US20090200718A1 (en) | 2006-04-29 | 2007-04-27 | Spring Shock Absorber for a Motor Vehicle |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102006019971 | 2006-04-29 | ||
DE102006019971.5 | 2006-04-29 | ||
DE102006038523.3 | 2006-08-17 | ||
DE102006038523A DE102006038523A1 (de) | 2006-04-29 | 2006-08-17 | Federdämpfer für ein Kraftfahrzeug |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2007124923A1 true WO2007124923A1 (de) | 2007-11-08 |
Family
ID=38292640
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2007/003734 WO2007124923A1 (de) | 2006-04-29 | 2007-04-27 | Federdämpfer für ein kraftfahrzeug |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2007124923A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010124885A1 (de) * | 2009-04-27 | 2010-11-04 | Continental Aktiengesellschaft | Luftfedereinrichtung |
Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2406835A1 (de) * | 1974-02-13 | 1975-08-14 | Gold Henning Dipl Ing | Federungs- und daempfungsvorrichtung, insbesondere fuer fahrzeuge |
US4493481A (en) * | 1977-11-12 | 1985-01-15 | Daimler-Benz Ag | Pneumatic spring for motor vehicles |
DE3436664A1 (de) * | 1983-10-07 | 1985-05-02 | Bridgestone Corp., Tokio/Tokyo | Membran-luftfeder |
US4934667A (en) * | 1986-08-13 | 1990-06-19 | General Motors Corporation | Air spring damper for vehicle suspension |
JPH05149366A (ja) * | 1991-12-02 | 1993-06-15 | Bridgestone Corp | 振動減衰装置 |
EP0658703A1 (de) * | 1993-11-29 | 1995-06-21 | Bridgestone Corporation | Schwingungsdämpfende Vorrichtung |
DE19531794C1 (de) * | 1995-08-30 | 1996-12-19 | Fichtel & Sachs Ag | Kolben-Zylinder-Aggregat |
EP1344957A1 (de) | 2002-03-13 | 2003-09-17 | Continental Aktiengesellschaft | Pneumatische Federungs- und Dämpfungsvorrichtung |
EP1353085A2 (de) * | 2002-04-09 | 2003-10-15 | Busak + Shamban GmbH | Dichtungsanordnung, insbesondere eines Luftfedersystems |
EP1457362A2 (de) * | 2003-03-14 | 2004-09-15 | Audi Ag | Luftfeder mit einer ersten und einer zweiten Arbeitskammer |
EP1467117A2 (de) * | 2003-04-10 | 2004-10-13 | Continental Aktiengesellschaft | Luftfederbein |
DE10356438B3 (de) * | 2003-12-03 | 2005-05-19 | Continental Aktiengesellschaft | Pneumatische Feder- und Dämpfereinheit, insbesondere für ein Kraftfahrzeug |
EP1715215A1 (de) * | 2005-04-20 | 2006-10-25 | Carl Freudenberg KG | Luftfederdämpfung |
-
2007
- 2007-04-27 WO PCT/EP2007/003734 patent/WO2007124923A1/de active Application Filing
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2406835A1 (de) * | 1974-02-13 | 1975-08-14 | Gold Henning Dipl Ing | Federungs- und daempfungsvorrichtung, insbesondere fuer fahrzeuge |
US4493481A (en) * | 1977-11-12 | 1985-01-15 | Daimler-Benz Ag | Pneumatic spring for motor vehicles |
DE3436664A1 (de) * | 1983-10-07 | 1985-05-02 | Bridgestone Corp., Tokio/Tokyo | Membran-luftfeder |
US4934667A (en) * | 1986-08-13 | 1990-06-19 | General Motors Corporation | Air spring damper for vehicle suspension |
JPH05149366A (ja) * | 1991-12-02 | 1993-06-15 | Bridgestone Corp | 振動減衰装置 |
EP0658703A1 (de) * | 1993-11-29 | 1995-06-21 | Bridgestone Corporation | Schwingungsdämpfende Vorrichtung |
DE19531794C1 (de) * | 1995-08-30 | 1996-12-19 | Fichtel & Sachs Ag | Kolben-Zylinder-Aggregat |
EP1344957A1 (de) | 2002-03-13 | 2003-09-17 | Continental Aktiengesellschaft | Pneumatische Federungs- und Dämpfungsvorrichtung |
EP1344957B1 (de) * | 2002-03-13 | 2005-10-05 | Continental Aktiengesellschaft | Pneumatische Federungs- und Dämpfungsvorrichtung |
EP1353085A2 (de) * | 2002-04-09 | 2003-10-15 | Busak + Shamban GmbH | Dichtungsanordnung, insbesondere eines Luftfedersystems |
EP1457362A2 (de) * | 2003-03-14 | 2004-09-15 | Audi Ag | Luftfeder mit einer ersten und einer zweiten Arbeitskammer |
EP1467117A2 (de) * | 2003-04-10 | 2004-10-13 | Continental Aktiengesellschaft | Luftfederbein |
DE10356438B3 (de) * | 2003-12-03 | 2005-05-19 | Continental Aktiengesellschaft | Pneumatische Feder- und Dämpfereinheit, insbesondere für ein Kraftfahrzeug |
EP1715215A1 (de) * | 2005-04-20 | 2006-10-25 | Carl Freudenberg KG | Luftfederdämpfung |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010124885A1 (de) * | 2009-04-27 | 2010-11-04 | Continental Aktiengesellschaft | Luftfedereinrichtung |
US8979076B2 (en) | 2009-04-27 | 2015-03-17 | Continental Teves Ag & Co. Ohg | Air spring device |
EP2425147B2 (de) † | 2009-04-27 | 2016-11-16 | Continental Teves AG & Co. oHG | Luftfedereinrichtung |
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