WO2018103983A1 - Module de ressort pneumatique comprenant un amortisseur de chocs - Google Patents

Module de ressort pneumatique comprenant un amortisseur de chocs Download PDF

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Publication number
WO2018103983A1
WO2018103983A1 PCT/EP2017/078560 EP2017078560W WO2018103983A1 WO 2018103983 A1 WO2018103983 A1 WO 2018103983A1 EP 2017078560 W EP2017078560 W EP 2017078560W WO 2018103983 A1 WO2018103983 A1 WO 2018103983A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
cylinder
rolling
air spring
base body
Prior art date
Application number
PCT/EP2017/078560
Other languages
German (de)
English (en)
Inventor
Rainer Jaeckel
Thomas Nowotka
Horst Drescher
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 WO2018103983A1 publication Critical patent/WO2018103983A1/fr

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
    • F16F9/02—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
    • F16F9/057—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 characterised by the piston
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G15/00—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type
    • B60G15/08—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring
    • B60G15/12—Resilient suspensions characterised by arrangement, location or type of combined spring and vibration damper, e.g. telescopic type having fluid spring and fluid damper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60G—VEHICLE SUSPENSION ARRANGEMENTS
    • B60G99/00—Subject matter not provided for in other groups of this subclass
    • B60G99/008—Other suspension arrangements with fluid springs
    • 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
    • F16F13/00—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs
    • F16F13/002—Units comprising springs of the non-fluid type as well as vibration-dampers, shock-absorbers, or fluid springs comprising at least one fluid 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
    • F16F9/02—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
    • 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
    • B60G2202/15—Fluid spring
    • B60G2202/152—Pneumatic spring

Definitions

  • the invention relates to an air spring module with a shock absorber having a cylinder whose fluid-filled interior is divided by a displaceable piston in a first working chamber and a second working chamber, which are connected to each other via a throttle connection, wherein the piston is a piston rod comprising, which is guided through the second working chamber and sealed to the outside Shen and is attached with its outer end to a lid, with an airtight and filled with air rolling bellows, which surrounds the piston rod with a radial distance and with its one end to the lid and with its other end fixed in the end portion of the cylinder closer to the cover, with a rolling piston surrounding the end of the cylinder closer to the cylinder, the tubular rolling piston connected to the cylinder and the end of the rolling bellows remote from the cover to the region of the cover remote End region of the rolling piston protrudes.
  • the object of the invention is to provide an air spring module with a shock absorber of the type mentioned, to avoid these disadvantages and to allow assembly with fewer components and to reduce the risk of failure.
  • a base body is arranged, which is enclosed by the rolling piston and connected thereto, wherein the rolling bellows with his closer to the cylinder end tightly connected to the flange-like body and the piston rod is guided through a coaxial opening of the body and sealed by a seal between the body and piston rod into the interior of the rolling bellows.
  • the air suspension module with a shock absorber carries a cab of a utility vehicle.
  • the lid facing the end of the cylinder may be connected to the holder for holding the cylinder.
  • the main body can extend over part of the length of the cylinder.
  • the cylindrical interior of the cylinder may be provided with a lubricious coating.
  • the base body and / or the rolling piston can be made of a plastic, to achieve a high stability with a small size preferably the plastic of the base body is a fiber-reinforced plastic.
  • the piston rod can pass through a guide opening projecting into the interior of the rolling bellows, which is formed on the cover-side closure of the cylinder or on the base body.
  • shock absorber is that the interior of the cylinder is filled with a hydraulic fluid.
  • the volume balance for the hydraulic fluid, the first working chamber via a valve assembly with a compensation chamber be connectable, the valve assembly comprises a leading from the first working chamber to the compensation space biased exhaust valve and a leading from the expansion chamber to the first working chamber biased inlet valve.
  • the interior of the cylinder is filled with a gaseous fluid.
  • a separating piston which separates the first working chamber from a gas space filled with a gas under pressure, for volume compensation of the gaseous fluid in the end region of the first working chamber facing away from the piston can be arranged in a sealed manner.
  • the expansion chamber or the gas space can be formed by a cup opening exhibiting pot-like housing part, which tightly surrounds the mouth of the pot opening facing away from the end of a lid connected to the base member.
  • the main body can be formed in the piston rod-side end portion of the cylinder and / or in the piston rod distal end portion of the cylinder flange radially expanded to cover the area between the lid-side end of the rolling piston and the piston rod or to form the compensation chamber on the piston rod side facing away from the cylinder.
  • the rolling piston in the longitudinal direction of extension of the piston rod may be formed in several parts and the several parts of the rolling piston in its operating position on the base body are axially fixed.
  • the parts of the rolling piston can be fixed radially inwardly into contact with the outer contour of the body, for which the parts of the rolling piston can be enclosed by a radially inwardly biased spring element in an easy mountable manner.
  • Figure 1 shows a first embodiment of an air spring module with shock absorbers in longitudinal section
  • Figure 2 shows a second embodiment of an air spring module with shock absorbers in longitudinal section.
  • the air spring modules with shock absorbers shown in the figures have a cylinder 1, the interior of which is filled with a hydraulic fluid and divided by a piston 2 into a first working chamber 3 and a second working chamber 4.
  • a piston rod 5 is arranged on one side, which is guided through the second working chamber 4 and sealed to the outside.
  • the piston 2 has throttle connections forming axial passage openings 20, of which a part of the first working chamber 3 to the second working chamber 4th and another part of the second working chamber 3 to the first working chamber 4 leading check valves 21 have.
  • a flange-like extended basic body 9 is arranged, which has a main body extension 6, 6 '. Both cylindrical main body extensions 6 and 6 'have a tubular middle part 8, wherein on the side of the first working chamber 3 of the
  • Basic body extension 6, 6 ' is radially expanded to a storage part 10.
  • Base body 9, main body extension 6, 6 'and storage part 10 are integrally formed from a fiber-reinforced plastic.
  • the piston rod 5 is sealed by a seal 12 passed through a coaxial guide opening 1 1 of the base body 9 and carries at its free end a cover thirteenth
  • tubular flexible bellows 14 At the radially outwardly encircling portion of the lid 13, one end of a sometimes pressurized gas filled, tubular flexible bellows 14 is attached to you. The second end of the rolling bellows 14 is fastened tightly to the radially encircling region of the main body 9.
  • a rolling-resistant piston 15 made of a fiber-reinforced plastic is fastened to the radially circumferential region of the main body 9, which surrounds the base body 9 and the piston rod side region of the main body extension 6, 6 'and is fixed thereto ,
  • the rolling piston is designed in several parts, wherein the parts of the rolling piston 15 in the longitudinal direction of the piston rod 5 are separated from each other, but in the illustrated operating position the base body 9 and the main body extension 6, 6 'completely enclose.
  • the main body extension 6, 6 ' has radially outwardly projecting fixing lugs 16, which can be inserted into corresponding radially inwardly directed fixing openings 17 of the rolling piston 15.
  • a radially circumferential groove 18 is formed, in which a radially inwardly biased elastic ring 19 is arranged, which biases and fixes the parts of the rolling piston 15 radially inwardly into contact with the outer contour of the base body 9 and main body extension ,
  • a pot-like housing part 22 is arranged, which encloses with its mouth region of its pot opening sealed by a sealing ring 23, the storage part 10.
  • the housing part 22 consisting of a metal sheet is fastened by radial circumferential curling into a radially encircling annular groove 24 on the storage part 10.
  • the lower end of the memory part 10 is formed differently in the right half and the left half.
  • the right half in Figure 1 and the left half in Figure 2 show a displaceable in the interior of the cylinder 1 separating piston 25.
  • the space is filled with a gas under pressure gas space 26th
  • Gas supply port 29 via a first line 31 to the gas space 26 and via a second line 32, which also leads through the base body 9, with the interior of the rolling bellows 14 connectable.
  • the interior of the cylinder 1 is closed by a closure 27 in which a biased outlet valve 28 and a biased inlet valve, not shown, are arranged.
  • the space is a compensating space 30 partially filled with a hydraulic fluid.
  • hydraulic fluid can flow out of the first working chamber 3 via the outlet valve 28 into the equalizing space 30.
  • hydraulic fluid flows from the

Landscapes

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

Abstract

L'invention concerne un module de ressort pneumatique comprenant un amortisseur de choc qui comporte un cylindre (1) dont l'espace intérieur rempli d'un fluide est divisé, par un piston mobile (2), en une première chambre de travail (3) et une deuxième chambre de travail (4), lesquelles sont reliées l'une à l'autre par le biais d'une liaison à étranglement. Le piston (2) comprend une tige de piston (5) qui est guidée à travers la deuxième chambre de travail (4) et de manière étanche vers l'extérieur et qui est fixée, par son extrémité extérieure, à un couvercle (13). L'invention comprend un soufflet roulant (14) étanche à l'air et rempli d'air, ledit soufflet roulant entoure la tige de piston (5) de manière espacée radialement et est fixé, par l'une de ses extrémités, au couvercle (13) et, par son autre extrémité, dans la zone d'extrémité, plus proche du couvercle (13), du cylindre (1). L'invention comporte en outre un piston déroulant (15) entourant la zone d'extrémité, plus proche du couvercle (13), du cylindre (1), le piston déroulant (15) formé de manière tubulaire étant relié au cylindre (1) et l'extrémité, éloignée du couvercle (13), du soufflet roulant (14) faisant saillie vers la région de la zone d'extrémité, éloignée du couvercle (13), du piston déroulant (15). Un corps de base (9) est disposé dans la zone d'extrémité côté tige de piston du cylindre (1), lequel corps de base est entouré par le piston déroulant (15) et est relié à celui-ci, le soufflet roulant (14) étant relié de manière étanche au corps de base (9) de type bride par son extrémité plus proche du cylindre (1) et la tige de piston (5) étant guidée à travers une ouverture coaxiale (11) du corps de base (9) et guidée dans l'intérieur du soufflet roulant (14) de manière étanche au moyen d'un joint d'étanchéité (12) entre le corps de base (9) et la tige de piston (5).
PCT/EP2017/078560 2016-12-08 2017-11-08 Module de ressort pneumatique comprenant un amortisseur de chocs WO2018103983A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016224463.9A DE102016224463A1 (de) 2016-12-08 2016-12-08 Luftfedermodul mit einem Stoßdämpfer
DE102016224463.9 2016-12-08

Publications (1)

Publication Number Publication Date
WO2018103983A1 true WO2018103983A1 (fr) 2018-06-14

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ID=60515316

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/078560 WO2018103983A1 (fr) 2016-12-08 2017-11-08 Module de ressort pneumatique comprenant un amortisseur de chocs

Country Status (2)

Country Link
DE (1) DE102016224463A1 (fr)
WO (1) WO2018103983A1 (fr)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002139A1 (fr) * 1981-12-18 1983-06-23 Applied Power Inc Assemblage d'amortisseur et de ressort pneumatique
US5518225A (en) * 1993-11-03 1996-05-21 Fichtel & Sachs Ag Pneumatic spring-vibration damper assembly
US5649692A (en) * 1994-03-18 1997-07-22 Fichtel & Sachs Ag Vibration damper and pneumatic suspension system
US20020113463A1 (en) * 2001-02-17 2002-08-22 Zf Sachs Ag Driver's cab suspension
DE20219883U1 (de) * 2002-12-21 2003-03-06 ZF Sachs AG, 97424 Schweinfurt Luftfeder mit integriertem Steuerventil
FR2948608A1 (fr) * 2009-07-30 2011-02-04 Wabco France Suspension pneumatique et utilisation pour cabine de camion
DE102009039841A1 (de) * 2009-09-03 2011-03-10 Thyssenkrupp Bilstein Suspension Gmbh Feder-Dämpfer-Element für eine Fahrerhauslagerung
DE102011082906A1 (de) * 2011-09-19 2013-03-21 Zf Friedrichshafen Ag Schwingungsdämpfer
US20150191066A1 (en) * 2012-09-21 2015-07-09 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Seal arrangement for an air spring system

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1152316B (de) * 1961-05-06 1963-08-01 Continental Gummi Werke Ag Luftfederung, insbesondere fuer Kraftfahrzeuge
DE2538805C2 (de) * 1974-08-30 1982-11-04 Monroe Auto Equipment Co. (n.d.Ges.d.Staates Delaware), Monroe, Mich. Federbein mit einem Teleskop-Stoßdämpfer
DE4429992C2 (de) * 1993-11-03 1996-11-28 Fichtel & Sachs Ag Luftfeder
JP3753196B2 (ja) * 1996-04-09 2006-03-08 カヤバ工業株式会社 ロッドガイドの成形方法
DE19802703A1 (de) * 1998-01-24 1999-07-29 Bayerische Motoren Werke Ag Luftfeder mit einem Rollbalg
US7070028B2 (en) * 2001-02-07 2006-07-04 Tenneco Automotive Operating Company Inc. Frequency dependent damper
US6443436B1 (en) * 2001-05-29 2002-09-03 Tenneco Automotive Inc. Air spring assembly on shock absorber with combined seal
DE102012003302B4 (de) * 2012-02-18 2017-01-26 Audi Ag Vorrichtung zum Verstellen der Federrate einer Gasfeder

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1983002139A1 (fr) * 1981-12-18 1983-06-23 Applied Power Inc Assemblage d'amortisseur et de ressort pneumatique
US5518225A (en) * 1993-11-03 1996-05-21 Fichtel & Sachs Ag Pneumatic spring-vibration damper assembly
US5649692A (en) * 1994-03-18 1997-07-22 Fichtel & Sachs Ag Vibration damper and pneumatic suspension system
US20020113463A1 (en) * 2001-02-17 2002-08-22 Zf Sachs Ag Driver's cab suspension
DE20219883U1 (de) * 2002-12-21 2003-03-06 ZF Sachs AG, 97424 Schweinfurt Luftfeder mit integriertem Steuerventil
FR2948608A1 (fr) * 2009-07-30 2011-02-04 Wabco France Suspension pneumatique et utilisation pour cabine de camion
DE102009039841A1 (de) * 2009-09-03 2011-03-10 Thyssenkrupp Bilstein Suspension Gmbh Feder-Dämpfer-Element für eine Fahrerhauslagerung
DE102011082906A1 (de) * 2011-09-19 2013-03-21 Zf Friedrichshafen Ag Schwingungsdämpfer
US20150191066A1 (en) * 2012-09-21 2015-07-09 Knorr-Bremse Systeme Fuer Nutzfahrzeuge Gmbh Seal arrangement for an air spring system

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