EP1747388B1 - Actionneur de transmission hydraulique - Google Patents

Actionneur de transmission hydraulique Download PDF

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Publication number
EP1747388B1
EP1747388B1 EP05716139A EP05716139A EP1747388B1 EP 1747388 B1 EP1747388 B1 EP 1747388B1 EP 05716139 A EP05716139 A EP 05716139A EP 05716139 A EP05716139 A EP 05716139A EP 1747388 B1 EP1747388 B1 EP 1747388B1
Authority
EP
European Patent Office
Prior art keywords
piston
diameter
actuating piston
cylinder housing
cylinder
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.)
Not-in-force
Application number
EP05716139A
Other languages
German (de)
English (en)
Other versions
EP1747388A1 (fr
Inventor
Serge Nassif
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.)
Dr Ing HCF Porsche AG
Original Assignee
Dr Ing HCF Porsche 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 Dr Ing HCF Porsche AG filed Critical Dr Ing HCF Porsche AG
Publication of EP1747388A1 publication Critical patent/EP1747388A1/fr
Application granted granted Critical
Publication of EP1747388B1 publication Critical patent/EP1747388B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/08—Characterised by the construction of the motor unit
    • F15B15/14—Characterised by the construction of the motor unit of the straight-cylinder type
    • F15B15/1423—Component parts; Constructional details
    • F15B15/1447—Pistons; Piston to piston rod assemblies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T74/00—Machine element or mechanism
    • Y10T74/19—Gearing
    • Y10T74/19219—Interchangeably locked
    • Y10T74/19251—Control mechanism

Definitions

  • the invention relates to a hydraulic transmission actuator according to the features of the preamble of patent claim 1.
  • Hydraulic transmission actuators are used for example in automated manual transmissions for the synchronization of the gears (see, for example, Johannes Lohmann, gear transmission, 2nd edition, page 156ff.).
  • actuator piston In generic hydraulic transmission actuators limited by two pressure chambers actuator piston is displaced by a respective pressurization in each case to the left or right, wherein a sealing element is provided for sealing the two pressure chambers on the actuating piston.
  • a sealing element is provided for sealing the two pressure chambers on the actuating piston.
  • the diameter of the hydraulic cylinder in an advantageous manner and Mode locally reduced in an area in which high actuating forces act on the actuator piston.
  • the diameter of the hydraulic cylinder is in a deviating from the central position of the actuating piston in the hydraulic cylinder left and right operative position relative to the Reduced diameter of the hydraulic cylinder at central position of the actuating piston.
  • the diameter of the hydraulic cylinder expands, so that the contact pressure of the sealing element with respect to the cylinder inner wall is adapted to the reduced actuating forces.
  • a high adjustment can be achieved with low friction in a first adjustment with a small piston diameter, while in the two operative positions, the hydraulic force acts on the large piston diameter, so that a higher radial contact pressure of the sealing element against the cylinder housing inner wall can be generated.
  • the hydraulic transmission actuator can be used in particular as an adjusting element for the synchronization of transmission gears in automated manual transmissions.
  • the preferably used as an adjusting element for synchronizing or for a gear change in an automated transmission transmission actuator 2 has a cylinder housing 4, in the cylinder chamber 6, a double-acting actuator piston 8 is received longitudinally displaceable.
  • the adjusting piston 8 is designed as a stepped piston and has a guided in the cylinder chamber 6 central piston 8a, followed by a left and right actuating piston element 8b and 8c.
  • the central piston 8a has on its peripheral surface a sealing ring 10, which seals the two separated by the central piston 8a cylinder part spaces 6a and 6b from each other.
  • the two adjusting piston elements 8b and 8c reduced in diameter relative to the central piston 8a are guided longitudinally displaceably in a left and a right cylinder housing part 4b and 4c.
  • a piston rod 12 and 14 is fixed, which is at the end of the left and right cylinder housing part 4b and 4c outwardly sealed by a respective seal 16 and 18.
  • subspaces 20 and 22 each have a hydraulic line 24 and 26 is connected, via which the two subspaces 20 and 22 are acted upon with hydraulic oil.
  • the diameter of the central cylinder housing part 4a is not uniform over its length I, but has in the central position or center position of the central piston 8a and at its left or right end corresponding to the end positions of the actuating piston 8, a maximum diameter D1 while the diameter decreases steadily from the left and right ends and from the center position of the center piston 8a.
  • the diameter of the central cylinder housing part 4a with its diameter D2 each have a minimum. If the actuating piston reaches one of these two effective positions W1 or W2 (see, for example, FIG. Fig. 3 ), the radial contact pressure of the sealing ring 10 with respect to the cylinder inner wall is greatest.
  • the center position of the central piston 8a corresponds to the neutral N position, while the left end position of the actuating piston 8 corresponds, for example, to an engaged gear 1 and the right end position of the actuating piston 8 corresponds to an engaged gear G3.
  • the production of a rotationally fixed connection between a rotatably but longitudinally displaceable on the transmission shaft arranged sliding sleeve unit and a sliding sleeve unit associated with the idler gear is required for the gear change.
  • To equalize the different rotational speeds of the gear shaft and the idler gear is arranged between the sliding sleeve unit and the idler gear synchronizing unit, z. B. Borg - Warner required.
  • the application of the transmission actuator is not limited to the use as an actuator for the gear change in an automated manual transmission; Rather, there are applications wherever there are different demands on the sealing of the two separated by the central piston 8a pressure chambers is required depending on the adjustment of the actuating piston.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gear-Shifting Mechanisms (AREA)
  • Actuator (AREA)
  • Sealing Devices (AREA)

Claims (4)

  1. Actionneur de transmission hydraulique, comprenant une unité cylindre-piston dans laquelle un piston de commande (8) disposé de manière déplaçable longitudinalement dans le boîtier de cylindre (4) divise la chambre du cylindre (6) en au moins deux chambres de pression (6a, 6b) qui peuvent être sollicitées en huile hydraulique par le biais de conduites de commande (24, 26), et comprenant une tige de piston (12, 14) connectée au piston de commande (8), et comprenant aussi un élément d'étanchéité (10) disposé sur le piston de commande (8), avec lequel les deux chambres de pression (6a, 6b) sont isolées hermétiquement l'une de l'autre, le diamètre du boîtier du cylindre (4) étant réduit localement pour augmenter la force de pression radiale de l'élément d'étanchéité (10) contre la paroi interne du cylindre,
    caractérisé en ce que
    le diamètre du boîtier du cylindre (4) est réalisé de telle sorte que le diamètre D2 du boîtier du cylindre (4) soit réduit dans une position fonctionnelle (W1, W2) à gauche et à droite s'écartant de la position centrale du piston de commande (8) par rapport au diamètre D1 du boîtier du cylindre (4) lorsque le piston de commande (8) se trouve dans la position centrale.
  2. Actionneur de transmission hydraulique selon la revendication 1, caractérisé en ce que le diamètre du boîtier du cylindre (4) - partant de la position fonctionnelle à gauche et à droite - s'élargit dans la direction de la position d'extrémité respective du piston de commande (8) et présente, dans les deux positions d'extrémité, sensiblement le même diamètre que dans la position centrale du piston de commande (8).
  3. Actionneur de transmission hydraulique selon la revendication 1 ou 2, caractérisé en ce que le piston de commande (8) et le boîtier du cylindre (4) sont réalisés de manière étagée.
  4. Utilisation d'un actionneur de transmission hydraulique selon l'une quelconque des revendications précédentes en tant qu'élément de commande pour le changement de vitesse dans une boîte de vitesses automatisée.
EP05716139A 2004-05-07 2005-03-17 Actionneur de transmission hydraulique Not-in-force EP1747388B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004022722A DE102004022722A1 (de) 2004-05-07 2004-05-07 Hydraulischer Getriebeaktuator
PCT/EP2005/002830 WO2005114008A1 (fr) 2004-05-07 2005-03-17 Actionneur de transmission hydraulique

Publications (2)

Publication Number Publication Date
EP1747388A1 EP1747388A1 (fr) 2007-01-31
EP1747388B1 true EP1747388B1 (fr) 2008-05-28

Family

ID=34961873

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05716139A Not-in-force EP1747388B1 (fr) 2004-05-07 2005-03-17 Actionneur de transmission hydraulique

Country Status (5)

Country Link
US (1) US7469625B2 (fr)
EP (1) EP1747388B1 (fr)
JP (1) JP4809832B2 (fr)
DE (2) DE102004022722A1 (fr)
WO (1) WO2005114008A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1028982C2 (nl) * 2005-05-06 2006-11-07 Enatec Micro Cogen B V Inrichting en werkwijze voor het omzetten van energie.
WO2010149127A1 (fr) * 2009-06-22 2010-12-29 Schaeffler Technologies Gmbh & Co. Kg Dispositif d'accouplement/de désaccouplement pour la transmission d'une force de piston sur au moins un embrayage
US20150007718A1 (en) * 2013-07-03 2015-01-08 Zp Interests, Llc Hydraulic actuator system and apparatus
CN105874218B (zh) 2013-11-05 2020-02-07 伊顿智能动力有限公司 高输出液压缸和活塞结构
WO2016077306A1 (fr) * 2014-11-10 2016-05-19 Eaton Corporation Boîte de vitesses automatique pour un véhicule électrique
CN111677714B (zh) * 2020-05-08 2022-03-18 安徽工程大学 一种用于高压低摩擦液压缸的活塞结构
CN114001064B (zh) * 2020-12-18 2024-04-05 北京鼎瑞通达轨道科技有限公司 一种转向架偏转检测缸

Family Cites Families (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2907304A (en) * 1957-04-04 1959-10-06 Macks Elmer Fred Fluid actuated mechanism
US2955667A (en) * 1957-09-04 1960-10-11 Ford Motor Co Hydraulic power steering mechanism with damping means
US3132569A (en) * 1961-11-13 1964-05-12 North American Aviation Inc Lightweight motor means
SE373206B (fr) * 1972-06-19 1975-01-27 Alfa Laval Ab
US4064788A (en) * 1976-07-29 1977-12-27 Parker-Hannifin Corporation Cushioning means for hydraulic cylinder
JPS604605A (ja) * 1983-06-24 1985-01-11 Isuzu Motors Ltd 流体圧アクチユエ−タ
JPS62180152A (ja) * 1986-02-05 1987-08-07 Jidosha Kiki Co Ltd 変速機操作装置
JP2683793B2 (ja) 1988-02-19 1997-12-03 自動車機器株式会社 変速機操作装置
JPH0743527Y2 (ja) * 1989-08-29 1995-10-09 自動車機器株式会社 変速機操作装置
JP2598210B2 (ja) 1992-12-01 1997-04-09 エスエムシー株式会社 シリンダ装置
JP2594562Y2 (ja) * 1993-06-11 1999-04-26 自動車機器株式会社 変速機操作用倍力装置
JPH08105481A (ja) * 1994-10-07 1996-04-23 Nifco Inc エアダンパ
DE19939204B4 (de) 1999-08-18 2012-09-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Gangschalteinrichtung für ein synchronisiertes Wechselgetriebe
JP4193329B2 (ja) * 2000-05-19 2008-12-10 いすゞ自動車株式会社 ４位置アクチユエータ
JP2002295413A (ja) * 2001-03-29 2002-10-09 Fuji Heavy Ind Ltd 油圧アクチュエータ
US7011010B2 (en) * 2004-03-18 2006-03-14 Praxair Technology, Inc. Free piston device with time varying clearance seal

Also Published As

Publication number Publication date
JP2007536478A (ja) 2007-12-13
US7469625B2 (en) 2008-12-30
US20070199394A1 (en) 2007-08-30
DE102004022722A1 (de) 2005-11-24
DE502005004285D1 (de) 2008-07-10
JP4809832B2 (ja) 2011-11-09
WO2005114008A1 (fr) 2005-12-01
EP1747388A1 (fr) 2007-01-31

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