WO2018108419A1 - Amortisseur hydraulique bi-tube - Google Patents

Amortisseur hydraulique bi-tube Download PDF

Info

Publication number
WO2018108419A1
WO2018108419A1 PCT/EP2017/079260 EP2017079260W WO2018108419A1 WO 2018108419 A1 WO2018108419 A1 WO 2018108419A1 EP 2017079260 W EP2017079260 W EP 2017079260W WO 2018108419 A1 WO2018108419 A1 WO 2018108419A1
Authority
WO
WIPO (PCT)
Prior art keywords
tube
shock absorber
double
working chamber
radially
Prior art date
Application number
PCT/EP2017/079260
Other languages
German (de)
English (en)
Inventor
Ralf Wittstadt
Elke ALMASSY
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
Priority to CN201790001505.7U priority Critical patent/CN211901416U/zh
Publication of WO2018108419A1 publication Critical patent/WO2018108419A1/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
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F16F9/3242—Constructional features of cylinders of cylinder ends, e.g. caps
    • 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
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F16F9/325—Constructional features of cylinders for attachment of valve 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
    • F16F9/32—Details
    • F16F9/3207—Constructional features
    • F16F9/3235—Constructional features of cylinders
    • F16F9/3257—Constructional features of cylinders in twin-tube type devices

Definitions

  • the invention relates to a hydraulic double tube shock absorber with an inner tube and a surrounding Au OH and slidably disposed in the inner tube and connected to a piston rod piston, which divides the interior of the inner tube into a first working chamber and a second working chamber and in which a or a plurality of the first working chamber and the second working chamber connecting throttle openings are formed, wherein the piston rod guided by the second working chamber and led out of one end of the outer tube, wherein the interior of the inner tube and a part of the outer tube and Au between the outer tube formed with a Dämpftenkeit and the rest of the Au noxraumes is filled with gas and wherein a bottom valve in a first working chamber at its end facing away from the piston rod end is arranged bottom through which connect the first working chamber with a to the ground hydroxyden gap is connectable, which in turn is connected to the outside space.
  • Such hydraulic double-tube shock absorbers are installed in a variety of mounting positions between a vertical and a horizontal mounting position and must be fully functional in all mounting positions. This also means that no gas may enter the inner space of the inner tube from the outer space forming a compensating space, since otherwise the damping effect of the double-tube shock absorber is greatly impaired.
  • the object of the invention is therefore to provide a hydraulic double-tube shock absorber of the type mentioned above, which avoids such an occurrence of gas in the first working chamber at least largely at a deviating from a vertical position installation position.
  • This object is achieved in that the adjoining the bottom space is connected via an inlet to the outside space, which extends over a radially circumferential region of the bottom of ⁇ 180 °.
  • the adjoining the bottom gap may be enclosed by a ring which is axially with its one end to the bottom and with its other end to a closure of the outer tube in abutment and in which the inlet is formed radially.
  • the inlet extends over a radially circumferential region between 110 ° and 50 °.
  • the bottom may be enclosed by a partial ring, the bottom of which is enclosed by a partial ring or a partial ring axially in contact with the bottom, wherein the partial ring extends over a radially encircling area of> 180 ° and between its ends directed in the direction of rotation has an inlet gap and radially inward on the radially encircling outer lateral surface of the bottom or of the inner tube in the region of the bottom in abutment and has a radial extent to the radially encircling inner circumferential surface of the outer tube.
  • the partial ring extends over a radially circumferential region between 250 ° and 310 °, in particular over a range between 270 ° and 290 °.
  • damping fluid and possibly gas present in the first working chamber are pressed out of the first working chamber via the bottom valve into the intermediate space adjoining the bottom, so that an increased pressure arises in the space adjoining the bottom.
  • This pressure acts on the inner surface of the partial ring and expands this by such a small amount, as it allows the radial clearance between the radially encircling outer surface of the partial ring and the cylindrical inner surface of the outer tube.
  • the radially inwardly directed resilient bias of the sub-ring may have at its ring ends spring lugs which engage corresponding recesses of the bottom with circumferentially of the sub-ring directed spring tension.
  • the partial ring consists of an elastomer or is designed as a slotted metal ring, which allows expansion during the retraction movement of the piston rod, but in the extension movement seals again.
  • the partial ring may have radially inwardly directed support arms, which are arranged distributed on the circumference of the partial ring and with which the partial ring is in axial contact with the floor.
  • a rotation of the partial ring from its installation position can be avoided that the support arms protrude into more radially directed recesses.
  • the double-tube shock absorber preferably has an installation position deviating from a vertical installation position, in particular a horizontal installation position, and the inlet or the inlet gap is directed downwards in the installed position.
  • Figure 1 is a side view of the lower end portion of a hydraulic double tube shock absorber
  • FIG. 2 shows a perspective view of the lower end region of a hydraulic double-tube shock absorber according to FIG. 1 3 shows a lower end view of the region of a bottom of an inner tube of the double-tube shock absorber according to FIG. 1 with a partial ring
  • Figure 4 is a perspective lower end view of the region of the bottom of an inner tube of the double tube shock absorber of Figure 1 with a partial ring
  • FIG. 5 shows a perspective view of the partial ring of the double-tube shock absorber according to FIG. 1.
  • the illustrated hydraulic double-tube shock absorber has an inner tube 1, which is coaxially enclosed by a radial distance from an outer tube 2, so that between inner tube 1 and outer tube 2, a ring-like outer space 3 is formed.
  • a piston slidably disposed, which is connected to a piston rod.
  • the piston divides the interior of the inner tube 1 into a first working chamber and a second working chamber and has one or more throttle openings connecting the first working chamber and the second working chamber.
  • the piston rod is guided by the second working chamber and projects in a sealed manner out of the upper end of the outer tube 2.
  • the interior of the inner tube 1 and a part of the outer space 3 are filled with a Dämpf problemkeit.
  • the rest of the outer tube is filled with a gas, e.g. Filled with air.
  • the lower end of the inner tube 1 is closed by a bottom 4, in which a bottom valve 5 is arranged, through which the first working chamber with a gap 6 is connectable, between the bottom 4 and a parallel shutter 7 of the end of the inner tube 1 protruding outer tube 2 is formed.
  • the bottom 4 has distributed on its outer circumference axially up to the closure 7 projecting projections 11, between which radially directed recesses 10 are formed.
  • connection joint 8 On the outer side of the closure 7, a connection joint 8 is arranged.
  • an inlet gap 13 is formed, via which the intermediate space 6 communicates with the external space 3.
  • the partial ring 9 radially inwardly projecting spring lugs 12 which project like a hook in recesses 10 'of the bottom 4 and attack in the circumferential direction of the partial ring 9 spring force directed towards each other on the side walls of the recesses 10'.
  • the elastic partial ring 9 is pulled with its inner circumferential surface radially in abutment against the radially encircling lateral surface of the bottom 4.
  • the double-tube shock absorber In the installation position, the double-tube shock absorber is in a position deviating from the vertical, in particular in an at least approximately horizontal position. In this case, the inlet gap 13 is directed downward, so that the intermediate space 6 is always filled with damping fluid from the outer space 3.
  • the partial ring 9 is fixed in its installed position so that it remains in this installation position during operation of the double-tube shock absorber.
  • a non-illustrated positive positioning between part ring 9 and outer tube 2 may be present.

Landscapes

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

Abstract

L'invention concerne un amortisseur hydraulique bi-tube comprenant un tube intérieur (1) et un tube extérieur (2) entourant celui-ci, ainsi qu'un piston disposé de manière mobile dans le tube intérieur (1) et relié à une tige de piston, lequel piston divise l'espace intérieur du tube intérieur (1) en une première chambre de travail et une deuxième chambre de travail et dans lequel piston un ou plusieurs orifices d'étranglement reliant la première chambre de travail et la deuxième chambre de travail sont formés. La tige de piston est guidée à travers la deuxième chambre de travail et guidée de manière étanche hors d'une extrémité du tube extérieur (2). L'espace intérieur du tube intérieur (1) et une partie de l'espace extérieur (3) formé entre le tube extérieur (2) et le tube intérieur (1) sont remplis d'un liquide d'amortissement et le reste de l'espace extérieur (3) est rempli de gaz, une soupape de fond (5) étant disposée dans un fond (4) fermant la première chambre de travail à son extrémité opposée à la tige de piston, soupape de fond au moyen de laquelle la première chambre de travail peut être reliée à un espace intermédiaire (6) adjacent au fond (4), lequel espace intermédiaire est pour sa part relié à l'espace extérieur (3). L'espace intermédiaire (6) adjacent au fond (4) est relié à l'espace extérieur (3) par le biais d'une alimentation qui s'étend sur une zone radialement périphérique du fond (4) < 180 °.
PCT/EP2017/079260 2016-12-16 2017-11-15 Amortisseur hydraulique bi-tube WO2018108419A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201790001505.7U CN211901416U (zh) 2016-12-16 2017-11-15 液压的双管式减振器

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016225341.7A DE102016225341B4 (de) 2016-12-16 2016-12-16 Hydraulischer Doppelrohr-Stoßdämpfer
DE102016225341.7 2016-12-16

Publications (1)

Publication Number Publication Date
WO2018108419A1 true WO2018108419A1 (fr) 2018-06-21

Family

ID=60515340

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/079260 WO2018108419A1 (fr) 2016-12-16 2017-11-15 Amortisseur hydraulique bi-tube

Country Status (3)

Country Link
CN (1) CN211901416U (fr)
DE (1) DE102016225341B4 (fr)
WO (1) WO2018108419A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018222084A1 (de) 2018-12-18 2020-06-18 Zf Friedrichshafen Ag Horizontal einsetzbarer Schwingungsdämpfer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005108131A1 (fr) * 2004-05-04 2005-11-17 Ap Amortiguadores, S.A. Amortisseur hydraulique equipe d'un mecanisme de blocage hydraulique en compression
WO2016015047A1 (fr) * 2014-07-25 2016-01-28 Hitachi Automotive Systems Americas Inc. Amortisseur

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1702380U (de) * 1955-04-28 1955-07-14 Hemscheidt Maschf Hermann Verbindung zwischen aeusserem stossdaempferrohr und unterem bzw. oberem bodenabschluss bei hydraulischen teleskopstossdaempfern.
NL135353C (fr) * 1967-09-22
DE4127453C1 (en) * 1991-08-20 1992-11-26 August Bilstein Gmbh & Co. Kg, 5828 Ennepetal, De Twin tube shock absorber - has piston running in tube with sheet metal end piece
US6334516B1 (en) * 2000-04-27 2002-01-01 Edelbrock Acceleration sensitive twin tube shock absorber
DE202006004598U1 (de) * 2006-03-21 2007-08-02 Al-Ko Kober Ag Stoßdämpfer mit Einbaulagensicherung
DE102008040210A1 (de) * 2008-07-07 2010-01-21 Zf Friedrichshafen Ag Schwingungsdämpfer mit einer ventilgesteuerten Fluidverbindung
US9285011B2 (en) * 2008-09-26 2016-03-15 Tenneco Automotive Operating Company Inc. High velocity compression damping valve

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005108131A1 (fr) * 2004-05-04 2005-11-17 Ap Amortiguadores, S.A. Amortisseur hydraulique equipe d'un mecanisme de blocage hydraulique en compression
WO2016015047A1 (fr) * 2014-07-25 2016-01-28 Hitachi Automotive Systems Americas Inc. Amortisseur

Also Published As

Publication number Publication date
CN211901416U (zh) 2020-11-10
DE102016225341A1 (de) 2018-06-21
DE102016225341B4 (de) 2020-03-26

Similar Documents

Publication Publication Date Title
DE102012210459B3 (de) Verstellbare Dämpfventileinrichtung
DE3840302C2 (de) Geräuscharmes Dämpfventil
DE102010002937B3 (de) Schwingungsdämpfer mit hubabhängiger Dämpfkraft
WO2018171996A1 (fr) Bague d&#39;étanchéité fendue, en particulier pour un amortisseur de vibrations
EP3213803B1 (fr) Système de filtre
DE102016202007B4 (de) Kolbenzylinder-Aggregat
DE202006003197U1 (de) Dämpfer für Möbel
DE102011051710B3 (de) Zugfeder
DE3215905A1 (de) Hydraulischer stossdaempfer in doppelrohr-ausfuehrung
EP2962022B1 (fr) Soupape de trop-plein
EP3458739B1 (fr) Amortisseur de vibrations dont la force d&#39;amortissement est fonction de la course
DE10307363B3 (de) Schwingungsdämpfer mit hubabhängiger Dämpfkraft
EP1923595B1 (fr) Amortisseur d&#39;oscillations doté d&#39;une force d&#39;amortissement dépendant de l&#39;amplitude
WO2018108419A1 (fr) Amortisseur hydraulique bi-tube
DE2165435C3 (de) Stoßdämpfer fur Kraft- und Schienenfahrzeuge
DE10343875B4 (de) Schwingungsdämpfer mit hubabhängiger Dämpfkraft
DE102006055192B3 (de) Gasfeder
DE4119104A1 (de) Unterflurhydrant
EP1428962A1 (fr) Ensemble piston-cylindre
DE202017104365U1 (de) Druckminderer-Filter-Anordnung
DE202005021063U1 (de) Einstellbarer Öldämpfer
DE102013200232B3 (de) Dämpfventilanordnung für einen Stoßdämpfer
EP3064813B1 (fr) Clapet anti-retour
DE202015102475U1 (de) Druckminderer-Filter-Anordnung
WO2018197106A1 (fr) Systèmes d&#39;étanchéification et de guidage

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 17807751

Country of ref document: EP

Kind code of ref document: A1

122 Ep: pct application non-entry in european phase

Ref document number: 17807751

Country of ref document: EP

Kind code of ref document: A1