EP1747388A1 - Hydraulischer getriebeaktuator - Google Patents
Hydraulischer getriebeaktuatorInfo
- Publication number
- EP1747388A1 EP1747388A1 EP05716139A EP05716139A EP1747388A1 EP 1747388 A1 EP1747388 A1 EP 1747388A1 EP 05716139 A EP05716139 A EP 05716139A EP 05716139 A EP05716139 A EP 05716139A EP 1747388 A1 EP1747388 A1 EP 1747388A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- cylinder
- diameter
- cylinder housing
- hydraulic transmission
- 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.)
- Granted
Links
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 claim 1.
- Hydraulic transmission actuators are used, for example, in automated manual transmissions to synchronize the transmission gears (see, for example, Johannes Lohmann, Gear Transmission, 2nd Edition, page 156ff.).
- the actuating piston delimited by two pressure chambers is displaced to the left or right by appropriate pressurization, a sealing element being provided on the actuating piston to seal the two pressure chambers.
- high actuating forces have to be applied, for example, when synchronizing the transmission gears, which necessitate reliable and permanent sealing or separation of the two pressure chambers.
- the object of the invention is therefore to improve the sealing of the two pressure chambers in the region of the actuating piston.
- the diameter of the hydraulic cylinder is advantageously locally reduced in an area in which high actuating forces act on the actuating piston.
- the diameter of the hydraulic cylinder is in a left and right operative position that deviates from the central position of the actuating piston in the hydraulic cylinder
- the diameter of the hydraulic cylinder is reduced when the control piston is in the middle. A higher contact pressure of the sealing element against the inner wall of the cylinder is thus achieved in both operative positions of the actuating piston.
- the diameter of the hydraulic cylinder expands so that the contact pressure of the sealing element with respect to the inner wall of the cylinder is adapted to the reduced actuating forces.
- the hydraulic transmission actuator can be used in particular as an actuating element for the synchronization of transmission gears in automated manual transmissions.
- the transmission actuator 2 which can preferably be used as an adjusting element for synchronizing or for changing gear in an automated manual transmission, has a cylinder housing 4, in the cylinder space 6 of which a double-acting adjusting piston 8 is accommodated in a longitudinally displaceable manner.
- the actuating piston 8 is designed as a stepped piston and has a central piston 8a guided in the cylinder space 6, to which a left and right actuating piston element 8b and 8c are connected.
- the central piston 8a has a sealing ring 10 on its circumferential surface, which seals the two partial cylinder chambers 6a and 6b separated by the central piston 8a.
- the two actuating piston elements 8b and 8c which are reduced in diameter compared to the central piston 8a, are guided in a longitudinally displaceable manner in a left and right cylinder housing part 4b and 4c.
- a piston rod 12 and 14 is fastened to the left and right adjusting piston elements 8b and 8c, respectively, which is sealed to the outside at the end of the left and right cylinder housing parts 4b and 4c by a seal 16 and 18, respectively.
- a hydraulic line 24 and 26 is connected to each of the subspaces 20 and 22 forming in the left and right cylinder housing parts 4b and 4c, via which the two subspaces 20 and 22 can be acted upon by hydraulic oil.
- the diameter of the central cylinder housing part 4a is not formed uniformly over its length I, but points in the central position or central position of the central piston 8a and on its left or right end, which corresponds to the end positions of the actuating piston 8, a maximum diameter D1, while the diameter decreases continuously starting from the left or right end and from the central position of the central piston 8a.
- the diameter of the central cylinder housing part 4a with its diameter D2 each has a minimum. If the actuating piston reaches one of these two active positions W1 or W2 (see, for example, FIG. 3), the radial contact pressure of the sealing ring 10 is greatest with respect to the inner wall of the cylinder.
- the hydraulic transmission actuator is used as a control element for changing gear in an automated manual transmission, which also includes the so-called double clutch transmission, for example, its function is as follows:
- the central 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, for example, to an engaged gear G3.
- the establishment of a rotationally fixed connection between a rotationally fixed but longitudinally displaceable on the transmission shaft is arranged for the gear change
- the left actuating piston element 8b is led out of the left cylinder housing part 4b, the hydraulic force acts on the left end face of the central piston 8a, which has a larger diameter. While a high adjustment speed with low friction is achieved in the first adjustment path due to the smaller piston area, the adjustment speed is reduced and reaches its minimum when, as shown in FIG. 3, the effective position W2 is reached with the central piston 8a. In this position - in which the radial pressing force of the sealing ring 10 is greatest with respect to the cylinder inner wall - the synchronization for gear G3 takes place. After a synchronism between the sliding sleeve unit and idler gear is achieved, the gear can be shifted through, due to the again expanding diameter of the central one Cylinder housing part 4a, the adjustment speed of the actuating piston 8 is increased again.
- the use of the transmission actuator is not limited to the use as an actuating element for changing gear in an automated manual transmission; Rather, there are possible applications where, depending on the adjustment path of the actuating piston, different requirements for the sealing of the two pressure spaces separated by the central piston 8a are required.
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)
Abstract
Description
Claims
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 (de) | 2004-05-07 | 2005-03-17 | Hydraulischer getriebeaktuator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1747388A1 true EP1747388A1 (de) | 2007-01-31 |
EP1747388B1 EP1747388B1 (de) | 2008-05-28 |
Family
ID=34961873
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05716139A Not-in-force EP1747388B1 (de) | 2004-05-07 | 2005-03-17 | Hydraulischer getriebeaktuator |
Country Status (5)
Country | Link |
---|---|
US (1) | US7469625B2 (de) |
EP (1) | EP1747388B1 (de) |
JP (1) | JP4809832B2 (de) |
DE (2) | DE102004022722A1 (de) |
WO (1) | WO2005114008A1 (de) |
Families Citing this family (7)
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 (de) * | 2009-06-22 | 2010-12-29 | Schaeffler Technologies Gmbh & Co. Kg | Ein-/ausrückeinrichtung zur übertragung einer kolbenkraft auf mindestens eine kupplung |
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 (en) * | 2014-11-10 | 2016-05-19 | Eaton Corporation | Automated transmission for an electric vehicle |
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)
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 (de) * | 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 |
-
2004
- 2004-05-07 DE DE102004022722A patent/DE102004022722A1/de not_active Withdrawn
-
2005
- 2005-03-17 US US10/592,677 patent/US7469625B2/en active Active
- 2005-03-17 DE DE502005004285T patent/DE502005004285D1/de active Active
- 2005-03-17 EP EP05716139A patent/EP1747388B1/de not_active Not-in-force
- 2005-03-17 JP JP2007511894A patent/JP4809832B2/ja not_active Expired - Fee Related
- 2005-03-17 WO PCT/EP2005/002830 patent/WO2005114008A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO2005114008A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20070199394A1 (en) | 2007-08-30 |
JP4809832B2 (ja) | 2011-11-09 |
EP1747388B1 (de) | 2008-05-28 |
DE102004022722A1 (de) | 2005-11-24 |
DE502005004285D1 (de) | 2008-07-10 |
US7469625B2 (en) | 2008-12-30 |
WO2005114008A1 (de) | 2005-12-01 |
JP2007536478A (ja) | 2007-12-13 |
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