DE945609C - Piston actuated by pressure medium, in particular for switching gears for motor vehicles - Google Patents
Piston actuated by pressure medium, in particular for switching gears for motor vehiclesInfo
- Publication number
- DE945609C DE945609C DEA21376A DEA0021376A DE945609C DE 945609 C DE945609 C DE 945609C DE A21376 A DEA21376 A DE A21376A DE A0021376 A DEA0021376 A DE A0021376A DE 945609 C DE945609 C DE 945609C
- Authority
- DE
- Germany
- Prior art keywords
- piston
- pressure medium
- piston body
- cylinder
- rings
- 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.)
- Expired
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
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J1/00—Pistons; Trunk pistons; Plungers
- F16J1/005—Pistons; Trunk pistons; Plungers obtained by assembling several pieces
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
- F15B11/12—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action
-
- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
-
- 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
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/26—Generation or transmission of movements for final actuating mechanisms
- F16H61/28—Generation or transmission of movements for final actuating mechanisms with at least one movement of the final actuating mechanism being caused by a non-mechanical force, e.g. power-assisted
- F16H61/30—Hydraulic or pneumatic motors or related fluid control means therefor
- F16H2061/307—Actuators with three or more defined positions, e.g. three position servos
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Gear-Shifting Mechanisms (AREA)
- Actuator (AREA)
Description
AUSGEGEBEN AM 12. JULI 1956ISSUED JULY 12, 1956
A 21376II163cA 21376II163c
Die Erfindung bezieht sich auf einen druckmittelbetätigten Kolben, insbesondere für die Schaltung von Getrieben für Motorfahrzeuge, der durch Druckmittekufuhr wahlweise in zwei Emidstelktngen verschiebbar ist und. durch zusätzliche Mittel in einer mittleren Wirklage zwischen den .beiden Endlagen festgehalten werden kann. Es sinid Anordnungen bekannt, bei denen der Kolben durch vorgespannte Federn in der mittleren Wirklage feststellbar ist. Dabei ist es jedoch nachteilig, daß jeweils erhebliche Kräfte zur Überwindung der Vorspannung beim Schalten nötig sind.The invention relates to a piston actuated by pressure medium, in particular for the circuit of transmissions for motor vehicles, the pressure medium supply optionally in two different versions is movable and. through additional funds in a middle effective action between the two End positions can be held. There are arrangements known, in which the piston by preloaded springs in the middle effective position is detectable. However, it is disadvantageous that in each case considerable forces to overcome the Preload when switching are necessary.
Erfindungsgemäß wird dieser -Nachteil dadurch überwunden, daß die zusätzlichen Mitterzum Festhalten des Kolbens in seiner mittleren Wirklage aus zwei auf dem Kolbenkörper längs verschiebbaren Ringkörpern bestehen, mit denen· der Kolbenkörper im Zylinder gelagert-ist, wobei diese Ring-According to the invention, this disadvantage is thereby overcome that the additional means for holding the piston in its central effective position consist of two ring bodies which can be moved longitudinally on the piston body, with which the piston body is stored in the cylinder, this ring
körper mit je zwei Anstihlagringen an den Enden der Kolbeökörperoberflädhe und an der Zylinderwandung derart zusammenwirken, daß bei Druckmittelzufluß zwischen die beiden Ringkörper diese in entgegengesetzten Richtungen an je einem ringförmigen Anschlag des Kolbenkörpers und der Zylinderwandung anpreßbar sind, so daß der as Kolbenkörper in seiner mittleren Wirblage blokkiert ist. Diese Lösung hat gegenüber einer Aast führung mit vorgespannten Federn den Vorteil, daß man beim Schalten nicht zuerst den Gegendruck der vorgespannten Federn überwinden muß. Man kann deshalb den Kolbenkörper mit einem verhältnismäßig niedrig gestellten Druckmittel sicher schalten.body with two stop rings at the ends of the piston body and the cylinder wall cooperate in such a way that when pressure medium flows between the two ring bodies, they can be pressed in opposite directions against an annular stop on the piston body and the cylinder wall, so that the piston body is in its central vortex position is blocked. This solution has the advantage over a Aast guide with preloaded springs that you do not first have to overcome the counterpressure of the preloaded springs when switching. You can therefore switch the piston body safely with a relatively low pressure medium.
Der Ringkörper hat bei der Lösung nach der Erfindung sowohl gegenüber dem Kolbenkörper als auch gegenüber der Zylinderfläohe zusätzliche Ab-The ring body has in the solution according to the invention both compared to the piston body as also compared to the cylinder surface additional
diichtelemente. Die Anschlagringe sind an den Kolbenenden durch in den Kolbenmantel eingesetzte Sprengringe und an der Zylinderwand durch die Stirnflächen von beidseitig in die Zylinderbohrung eingesetzten Büchsen gebildet.sealing elements. The stop rings are inserted into the piston skirt at the piston ends Snap rings and on the cylinder wall through the end faces from both sides into the cylinder bore inserted bushes formed.
Die Zeichnung- bringt ein Ausführungsbeispiel für die Erfindung. Es zeigenThe drawing brings an embodiment of the invention. Show it
Fig. ι und 2 Vertikalschnitte durch die Vorrichtung mit dem Kolbenkörper in zwei verschiedenen Wirkstellungen.Fig. Ι and 2 vertical sections through the device with the piston body in two different working positions.
Im Schaltzylinder 1 mit den drei Druokmittelanschlüssen 2, 3 und 4 ist der Kolbenkörper 5 mittels der beiden längs verschiebbaren Ringkörper 7 und 8 gelagert. Die Kolbenstange 6 wirkt auf an. sich bekannte, nicht dargestellte Schaltmuffen. Die beiden Ringkörper 7 und 8 liegen über je eine Dichtung 9 bzw. 10 an der Innenwand des Zylinders 1 und am Kolbenkörper 5 an. In die Endteile des Kolbenkörpens sind die beiden Sprengringe 12 und 13 eingelassen, die mit ihren beiden gegeneinandergerichteten Flächen Anschlagflächen 12' und 13' für die längs verschiebbaren Ringkörper 7 und 8 bilden. An den Enden der Zylinderbohrung sind zwei Büchsen 14 und 15 vorgesehen, deren nach innen gerichtete Stirnseiten ebenfalls Anschläge 14' und 15'· für die Ringkörper 7 und 8 bilden. Bei Mittellage des Kolbenkörpers 5 im Zylinder 1 entsprechend Fig. 2 liegen die Anschlagnächen 14' und 15' der Büchsen 14 und 15 und die Anschlagflächen 12' und 13' der Sprengringe 12 und 13 in Normalebenen zur Zylinderachse.In the switching cylinder 1 with the three pressure medium connections 2, 3 and 4 is the piston body 5 by means of the two longitudinally displaceable ring bodies 7 and 8 stored. The piston rod 6 acts on. known, not shown shift sleeves. The two ring bodies 7 and 8 each have a seal 9 and 10 on the inner wall of the Cylinder 1 and on the piston body 5. The two snap rings are in the end parts of the piston body 12 and 13 let in, the stop surfaces with their two opposing surfaces 12 'and 13' for the longitudinally displaceable Form ring bodies 7 and 8. At the ends of the cylinder bore two sleeves 14 and 15 are provided, their inwardly directed end faces also have stops 14 'and 15' · for the ring bodies 7 and 8 form. When the piston body 5 is in the middle position in the cylinder 1 as shown in FIG the stop surfaces 14 'and 15' of the bushes 14 and 15 and the stop surfaces 12 'and 13' of the Snap rings 12 and 13 in planes normal to the cylinder axis.
Die linke und mittlere Stellung des Kolbenkörpers 5 nach Fig. 1 und 2 entsprechen je einer Wirklage. Die dritte Wirklage ergibt sich bei Stellung des Kolbenkörpens 5 in der rechten Endlage. The left and middle positions of the piston body 5 according to FIGS. 1 and 2 each correspond to one Real action. The third effective position arises when the piston body 5 is in the right end position.
Der Getriebesehalthebel ist mit dem Druckmittelverteilmechanismius auf an sich bekannte Weise (nicht dargestellt) verbunden, wobei das- Druckmittel z. B. öl oider Druckluft sein kann. Für das Ausführungsbeispiel sei angenommen, daß als Druckmittel Druckluft verwendet wird.The transmission holding lever is with the pressure medium distribution mechanism connected in a manner known per se (not shown), the pressure medium z. B. oil oider compressed air can be. For the Embodiment it is assumed that compressed air is used as the pressure medium.
Bei der in Fig. 1 dargestellten linken Wirklage des Kolbenkörpers 5 im Zylinder 1 ist der Druck-· luftschaltmechanismus durch den Getriebesehalthebel derart eingestellt, daß die Bohrungen 2 und 3 mit der freien Außenluft und die öffnung 4 mit dem Druckliuftvorratsbehälter verbunden sind, Diese Einrichtung arbeitet wie folgt: Soll z. B. der Kolbenkörper 5 von der linken Endlage entsprechend Fig. ι in die mittlere Wirklage nach Fig. 2 gebracht werden, dann verbindet der Druckmittelschaltmechamsmus die Bohrung 3 mit der Diruckmittelzufuhr und die Bohrung 4 mit der Entlüftung. Die auf der rechten Seite des Kolbenkörpers 5 im Zylinder 1 vorhandene Druckluft ent weicht dabei durch die Bohrung 4 ins Freie, während die Bohrung 2 entlüftet bleibt. Die durch die Bohrung 3 einströmende Druckluft verschiebt nun den Ringkörper 8 und mit dem Sprengring 13 zugleich auch den Kolbenkörper 5 nach rechts, bis der Ringkörper 8 gegen die Anschlagfläche 15' der Büchse 15 stößt. Da der Ringkörper 7 bereits an der Anschlagfläche 14' der Büchse 14 anliegt, kann er seine Position im Zylinder 1 während dieses Vorgangs nicht ändern. Der Druck im Ringraum zwischen den beiden Ringkörpern 7 und 8 hält den Kolbenkörper 5 im seiner MitteHage fest.In the left effective position of the piston body 5 in the cylinder 1 shown in Fig. 1, the pressure · air switching mechanism adjusted by the gear lever so that the holes 2 and 3 are connected to the free outside air and the opening 4 to the compressed air reservoir, This facility works as follows: Should z. B. the piston body 5 from the left end position accordingly Fig. Ι are brought into the middle effective position according to Fig. 2, then connects the Druckmittelschaltmechamsmus the bore 3 with the pressure medium supply and the bore 4 with the vent. The compressed air present on the right side of the piston body 5 in the cylinder 1 ent gives way through the bore 4 into the open, while the bore 2 remains vented. The through the Compressed air flowing into the bore 3 now moves the ring body 8 and the snap ring 13 at the same time also the piston body 5 to the right until the ring body 8 against the stop surface 15 'of the Bushing 15 pushes. Since the ring body 7 is already in contact with the stop surface 14 'of the sleeve 14, can it does not change its position in cylinder 1 during this process. The pressure in the annulus between the two ring bodies 7 and 8 holds the piston body 5 firmly in its center.
Soll der Kolbenkörper 5 von der mittleren in die rechte Wirklage gebracht werden, dann verbindet der Druckmittelschaltmechanismus die Bohrung 3 mit der freien Außenluft und die Bohrung 2 mit dem Druckluftbehälter, wobei die Bohrung 4 nach wie vor mit dem Freien verbunden bleibt. Die einströmende Druckluft verschiebt darauf den Kolbenkörper S nach rechts, wobei der Ringkörper 7 durch den Sprengring 12 ebenfalls nach rechts verschoben wird, bis der Kolbenkörper 5 seine rechte Wirklage erreicht und dort festgehalten wird.If the piston body 5 is to be brought from the middle to the right operative position, then it connects the pressure medium switching mechanism the bore 3 with the free outside air and the bore 2 with the compressed air tank, the bore 4 still remaining connected to the open air. The incoming Compressed air then moves the piston body S to the right, whereby the ring body 7 through the snap ring 12 is also moved to the right until the piston body 5 is in its right-hand position reached and held there.
Claims (4)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH759235X | 1954-02-27 |
Publications (1)
Publication Number | Publication Date |
---|---|
DE945609C true DE945609C (en) | 1956-07-12 |
Family
ID=4534550
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEA21376A Expired DE945609C (en) | 1954-02-27 | 1954-10-23 | Piston actuated by pressure medium, in particular for switching gears for motor vehicles |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH319349A (en) |
DE (1) | DE945609C (en) |
FR (1) | FR1116084A (en) |
GB (1) | GB759235A (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1132810B (en) * | 1958-03-19 | 1962-07-05 | Zahnradfabrik Friedrichshafen | Switching device actuated by pressure medium for step change transmissions, especially of motor vehicles |
DE1155348B (en) * | 1958-11-13 | 1963-10-03 | Tatra Np | Pneumatic actuation device for switching a step change gear, especially for motor vehicles |
DE1292516B (en) * | 1961-12-14 | 1969-04-10 | Tatra Np | Pneumatic actuation device for switching a step change gear, especially for motor vehicles |
DE3107908A1 (en) * | 1981-03-02 | 1982-09-16 | Leibfried Maschinenbau Gmbh, 7033 Herrenberg | Piston/cylinder unit |
DE3209319A1 (en) * | 1981-03-18 | 1982-10-07 | Hoerbiger Ventilwerke AG, 1110 Wien | SEALING DEVICE FOR PNEUMATIC AND HYDRAULIC CONTROL UNITS |
DE3110855A1 (en) * | 1981-03-20 | 1982-10-14 | Wabco Fahrzeugbremsen Gmbh, 3000 Hannover | Working cylinder with three positions |
DE3213757A1 (en) * | 1981-04-16 | 1983-01-20 | Autóipari Kutató Intézet, Budapest | Pneumatic piston shift drive, especially for vehicle gearboxes |
DE3213758A1 (en) * | 1981-04-16 | 1983-01-27 | Autóipari Kutató Intézet, Budapest | Pneumatic three-position shift drive, especially for shifting the stages of gearboxes |
DE3118583A1 (en) * | 1981-05-11 | 1983-02-10 | Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover | THREE-POSITION GEAR CYLINDER |
DE3702911A1 (en) * | 1987-01-31 | 1988-08-11 | Ernst Hunger | Working cylinder with three positions |
EP0487861A1 (en) * | 1990-11-30 | 1992-06-03 | CLAAS Kommanditgesellschaft auf Aktien | Three position actuator system |
EP0620387A2 (en) * | 1993-04-10 | 1994-10-19 | HYDRAULIK-RING ANTRIEBS- UND STEUERUNGSTECHNIK GmbH | Actuator for vehicle gear box |
DE102005026475A1 (en) * | 2005-06-09 | 2006-12-14 | Zf Friedrichshafen Ag | vehicle transmissions |
DE102008045658A1 (en) * | 2008-09-03 | 2010-03-04 | Schaeffler Kg | Pressurizing medium-operated switching device for step-change speed gearbox of motor vehicle, has switching rod at which switching element is fastened, and linear drive i.e. double operating fluid drive, connected on side with switching rod |
WO2018077462A1 (en) * | 2016-10-27 | 2018-05-03 | Wabco Europe Bvba | Shift cylinder of an automated change-speed gearbox |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1223257B (en) * | 1956-05-03 | 1966-08-18 | Renault | Pneumatic three-position working cylinder |
US3412649A (en) * | 1966-08-05 | 1968-11-26 | Dole Valve Co | Multi-position vacuum motor |
DD105972A3 (en) * | 1972-03-08 | 1974-05-20 | ||
FR2490292A1 (en) * | 1980-09-17 | 1982-03-19 | Unic Sa | Double acting fluid ram - has sliding piston in form of sheath pressed in both directions by two springs |
FR2600123B1 (en) * | 1986-06-13 | 1988-10-07 | Renault Vehicules Ind | THREE-POSITION CYLINDER |
DE3836725C1 (en) * | 1988-10-28 | 1989-12-21 | Daimler-Benz Aktiengesellschaft, 7000 Stuttgart, De | |
JP5023155B2 (en) * | 2006-11-22 | 2012-09-12 | ボルボ ラストバグナー アーベー | Modular system for manufacturing fluid operated actuators with two and three stable positions |
SE536688C2 (en) * | 2012-10-03 | 2014-05-27 | Scania Cv Ab | Control cylinder for a gearbox, a gearbox with such control cylinder, and a vehicle with such a gearbox |
CN114033849A (en) * | 2021-11-04 | 2022-02-11 | 陕西法士特齿轮有限责任公司 | Multi-piston cylinder structure capable of being detached on single side |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE674501C (en) * | 1933-11-08 | 1939-04-15 | Bendix Westinghouse Automotive | Switching device for gear change transmission, especially of motor vehicles, with remote control by a pressure medium |
DE754346C (en) * | 1935-06-25 | 1952-03-31 | Bendix Westinghouse Automotive | Shifting device for gear change transmissions of motor vehicles, adjustable by an auxiliary |
-
1954
- 1954-02-27 CH CH319349D patent/CH319349A/en unknown
- 1954-10-23 DE DEA21376A patent/DE945609C/en not_active Expired
- 1954-11-16 GB GB933135/54A patent/GB759235A/en not_active Expired
- 1954-12-20 FR FR1116084D patent/FR1116084A/en not_active Expired
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE674501C (en) * | 1933-11-08 | 1939-04-15 | Bendix Westinghouse Automotive | Switching device for gear change transmission, especially of motor vehicles, with remote control by a pressure medium |
DE754346C (en) * | 1935-06-25 | 1952-03-31 | Bendix Westinghouse Automotive | Shifting device for gear change transmissions of motor vehicles, adjustable by an auxiliary |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1132810B (en) * | 1958-03-19 | 1962-07-05 | Zahnradfabrik Friedrichshafen | Switching device actuated by pressure medium for step change transmissions, especially of motor vehicles |
DE1155348B (en) * | 1958-11-13 | 1963-10-03 | Tatra Np | Pneumatic actuation device for switching a step change gear, especially for motor vehicles |
DE1292516B (en) * | 1961-12-14 | 1969-04-10 | Tatra Np | Pneumatic actuation device for switching a step change gear, especially for motor vehicles |
DE3107908A1 (en) * | 1981-03-02 | 1982-09-16 | Leibfried Maschinenbau Gmbh, 7033 Herrenberg | Piston/cylinder unit |
DE3209319A1 (en) * | 1981-03-18 | 1982-10-07 | Hoerbiger Ventilwerke AG, 1110 Wien | SEALING DEVICE FOR PNEUMATIC AND HYDRAULIC CONTROL UNITS |
DE3110855A1 (en) * | 1981-03-20 | 1982-10-14 | Wabco Fahrzeugbremsen Gmbh, 3000 Hannover | Working cylinder with three positions |
DE3213757A1 (en) * | 1981-04-16 | 1983-01-20 | Autóipari Kutató Intézet, Budapest | Pneumatic piston shift drive, especially for vehicle gearboxes |
DE3213758A1 (en) * | 1981-04-16 | 1983-01-27 | Autóipari Kutató Intézet, Budapest | Pneumatic three-position shift drive, especially for shifting the stages of gearboxes |
DE3118583A1 (en) * | 1981-05-11 | 1983-02-10 | Wabco Westinghouse Fahrzeugbremsen GmbH, 3000 Hannover | THREE-POSITION GEAR CYLINDER |
DE3702911A1 (en) * | 1987-01-31 | 1988-08-11 | Ernst Hunger | Working cylinder with three positions |
EP0487861A1 (en) * | 1990-11-30 | 1992-06-03 | CLAAS Kommanditgesellschaft auf Aktien | Three position actuator system |
EP0620387A2 (en) * | 1993-04-10 | 1994-10-19 | HYDRAULIK-RING ANTRIEBS- UND STEUERUNGSTECHNIK GmbH | Actuator for vehicle gear box |
EP0620387A3 (en) * | 1993-04-10 | 1995-01-04 | Hydraulik Ring Gmbh | Actuator for vehicle gear box. |
DE102005026475A1 (en) * | 2005-06-09 | 2006-12-14 | Zf Friedrichshafen Ag | vehicle transmissions |
US8006585B2 (en) | 2005-06-09 | 2011-08-30 | Zf Friedrichshafen Ag | Actuating cylinder for vehicle gearboxes |
DE102008045658A1 (en) * | 2008-09-03 | 2010-03-04 | Schaeffler Kg | Pressurizing medium-operated switching device for step-change speed gearbox of motor vehicle, has switching rod at which switching element is fastened, and linear drive i.e. double operating fluid drive, connected on side with switching rod |
WO2018077462A1 (en) * | 2016-10-27 | 2018-05-03 | Wabco Europe Bvba | Shift cylinder of an automated change-speed gearbox |
Also Published As
Publication number | Publication date |
---|---|
CH319349A (en) | 1957-02-15 |
GB759235A (en) | 1956-10-17 |
FR1116084A (en) | 1956-05-03 |
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