EP1111248B1 - Vérin à point d'arrêt intermédiaire - Google Patents
Vérin à point d'arrêt intermédiaire Download PDFInfo
- Publication number
- EP1111248B1 EP1111248B1 EP00403557A EP00403557A EP1111248B1 EP 1111248 B1 EP1111248 B1 EP 1111248B1 EP 00403557 A EP00403557 A EP 00403557A EP 00403557 A EP00403557 A EP 00403557A EP 1111248 B1 EP1111248 B1 EP 1111248B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- cylinder
- shuttle
- actuator according
- chamber
- 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 - Lifetime
Links
Images
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
- 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
- F15B11/10—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor in which the servomotor position is a function of the pressure also pressure regulators as operating means for such systems, the device itself may be a position indicating system
-
- 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
- F15B11/121—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions
- F15B11/122—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor providing distinct intermediate positions; with step-by-step action providing distinct intermediate positions by means of actuators with multiple stops
-
- 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
- F15B15/20—Other details, e.g. assembly with regulating devices
- F15B15/26—Locking mechanisms
- F15B15/262—Locking mechanisms using friction, e.g. brake pads
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7053—Double-acting output members
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/72—Output members, e.g. hydraulic motors or cylinders or control therefor having locking means
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/765—Control of position or angle of the output member
- F15B2211/7653—Control of position or angle of the output member at distinct positions, e.g. at the end position
Definitions
- the present invention relates generally to a cylinder, and, in its preferred embodiment, a cylinder double-acting.
- the invention relates to a jack comprising at least a first working chamber at variable volume delimited by a cylinder of length determined, by a first bottom wall of the cylinder, and by a first face of a piston selectively moved in the cylinder, from a rest position corresponding to a minimum volume of the first chamber to an extreme position, by means of a fluid under pressure injected into the first chamber, the piston being extended by an actuating rod external to the first chamber and protruding from the cylinder.
- Cylinders of this type have been known for a long time and find application in many areas of the technique.
- the main objective of the invention is therefore to propose a structural cylinder simple and nevertheless meets this requirement in a way satisfactory.
- a first accessory objective of the invention is to propose a jack whose structure allows, so simple, to define the intermediate stop position of the actuating rod during the construction of the cylinder.
- a second accessory objective of the invention is to offer a cylinder in which the stop position the actuating rod can be defined at any point between the extreme positions of this rod.
- a third accessory objective of the invention is to propose a jack in which the stop position the actuating rod can be defined with relatively high precision.
- a fourth accessory objective of the invention is to provide a jack whose size either reduced and independent of the choice of intermediate stop position of the actuating rod.
- the cylinder of the invention moreover conforms to the generic definition given by the preamble above, is characterized according to claim 1.
- this cylinder comprises a second working chamber delimited by the cylinder, by a second face of the piston, and by a second bottom wall of the cylinder, this second wall being traversed so sealed by the actuating rod.
- the liaison body comprises, for example, one or more several rigid connecting rod (s), mounted sliding (s) tightly through the piston, or in the actuating rod if it is hollow, between first and second stops.
- the shuttle comprises a body essentially cylindrical and the retainers axial include balls stressed by force radial elastic and selectively bearing, for a limit position adopted by the shuttle at least when the piston is in its intermediate position, on an inclined surface of the shuttle body.
- the axial retaining members can include an essentially cylindrical pusher, axially stressed in the housing by a spring prestressed in the direction of the piston, and having a conical ramp which, at least in the limit position of the shuttle, is supported on the balls.
- the tapered ramp of the pusher flares towards piston while the inclined surface of the shuttle body is substantially frustoconical and converges towards the piston.
- the pusher can delimit in the housing of the first and second auxiliary chambers, waterproof to each other and the second of which communicates with the first working chamber through the passage, which results in the balls ceasing to be pressed against the inclined surface of the body of the shuttle by the radial elastic force when the pressurized fluid injected into the first chamber of work exerts on the pusher sufficient force to compress the prestressed spring.
- the inclined surface of the shuttle body can then be transversely terminated by a rear face and the axial retaining members may include a core shouldered, elastically pressed against the rear face of the shuttle body, of which an anterior part substantially cylindrical takes the place of the surface tilted to keep the balls in position radial they adopt when the shuttle leaves its resting state.
- the axial retaining members advantageously comprise a front support of the casing, serving as an axial stop for the balls, and the core is preferably mounted sliding in the pusher and guided by him.
- the cylinder essentially comprises a cylinder 2 in which a sliding piston 3 defines a working chamber rear 11 and a front working chamber 12.
- Cylinder 2 is closed at its rear ends and before by respective bottom walls, 21 and 22, separated from each other by a distance L0 representing the length of the cylinder.
- the rear working chamber 11 is thus located defined in cylinder 2 between a rear face 31 of the piston 3 and the rear bottom wall 21 of the cylinder, the working chamber before 12 being defined in the cylinder 2 between a front face 32 of the piston 3 and the front bottom wall 22 of the cylinder.
- Cylinder 2 is drilled in each of the chambers 11 and 12, of an injection and delivery orifice, such that 61, 23, by which a pressurized fluid can be injected into or be ejected from this chamber, piston 3 can thus be moved in cylinder 2 from a rest position which corresponds to a minimum volume of the rear chamber 11 (FIGS. 1 and 4), up to a extreme actuation position corresponding to a volume maximum of this chamber 11 ( Figures 3 and 6).
- the piston 3 is extended by a rod actuator 4, which is external to the rear chamber 11, which protrudes from cylinder 2 by crossing sealingly the front bottom wall 22 of the cylinder, and which therefore adopts a position imposed by that of the piston.
- the jack according to the invention is remarkable in that that it essentially comprises a connecting member 5 which, at least in the particular embodiments illustrated, takes the form of one or more rods rigid, and a retainer 678, this device itself comprising a casing 6, retaining members axial 7, and a shuttle 8.
- the or each connecting rod 5 has a length L less than the length L0 of the cylinder, is disposed in the cylinder 2, and connects the piston 3 to the shuttle 8.
- the cylinder of the invention can, as shown by Figures 1 to 3, or use several connecting rods 5 sliding climbs tightly across the piston 3 between first and second stops 91a, 91b, either, if the actuating rod 4 is hollow, use a single connecting rod 5 slidably mounted in the actuating rod, between first and second stops 92a, 92b, as shown in Figures 4 to 6.
- the casing 6 is adjacent to the rear bottom wall 21 of the cylinder, is arranged outside the chamber 11 rear, and contains the axial retaining members 7.
- the shuttle 8 is either in a state of rest, illustrated in the figures 1, 2, 4, and 5, for which it is housed in the housing 6, either in a free state, which is illustrated in the figures 3 and 6, and which it reaches by crossing a passage 61 open between housing 6 and the rear working chamber 11.
- the shuttle 8 is placed in its rest state, in particular when the piston 3 is in its rest position, and is moved from its state of rest when the piston exceeds a position intermediate between its rest position and its position extreme, this intermediate position being illustrated in Figures 2 and 5.
- the axial retaining members 7 have the function to exercise on shuttle 8, in its resting state ( Figures 2 and 5), an axial retaining force Fx of limited amplitude opposing a displacement of the shuttle 8 out of its resting state.
- shuttle 8 can include a body 80 extended, backwards, by a surface inclined 81 radially divergent, and the organs of axial retention 7 comprise for example balls 71a, 71b stressed by a radial elastic force centripetal Fr and bearing on the inclined surface 81 for a limit position of shuttle 8 such as illustrated in Figures 2 and 5.
- shuttle 8 rest is defined as an energy state and that the shuttle can therefore remain in its resting state in several different axial positions (for example illustrated in Figures 1 and 2, 4 and 5), as is the case when the body 80 of the shuttle is cylindrical.
- FIGS. 2 and 5 are limit positions, precisely defined by the length of the connecting rod (s), and is located at the border between the state of rest and the free state of shuttle 8.
- the balls 71a, 71b can be pushed by a conical ramp 720 defined on a cylindrical pusher 72, which is itself solicited, following a direction axial oriented from rear to front, by a spring prestressed 73 resting on the bottom of the casing 6.
- the balls 71a, 71b are moreover maintained axially by a front support 62 of the casing 6, which makes forward axial stop office.
- the 720 conical ramp pusher 72 flares towards piston 3, then that the inclined surface 81 of the body 8 of the shuttle, which is also substantially frustoconical, flares in reverse direction, and therefore converges towards the piston 3.
- the pusher 72 itself forms a piston for the casing 6, that is to say that it delimits therein rear and front auxiliary chambers 601 and 602, waterproof against each other, the chamber auxiliary before 602 communicating with the rear work 11 through passage 61, and the chamber rear auxiliary 601 preferably opening onto the atmosphere by drilling 64.
- the inclined surface 81 of the body 8 of shuttle ends with a rear transverse face 82, against which the front part is supported cylindrical 740 of a shouldered core 74.
- the front part 740 of the core 74 takes the place of the inclined surface 81 for maintain the balls 71a, 71b in the radial position that they adopt when the shuttle 8 leaves its state of rest, so that the balls 71a, 71b resume spontaneously their place on the body 80 of the shuttle 8 when it returns to its resting state after to have left him.
- the core 74 is preferably guided sliding inside the pusher 72 and biased by a spring 741 bearing in the bottom of this pusher 72.
- the cylinder can be actuated by injection of a pressurized fluid in the rear chamber 11, by example by injecting this fluid into an orifice 63 of the casing 6, which communicates with passage 61 open between the rear chamber 11 and the front auxiliary chamber 602 of the casing 6, which is otherwise assumed to be tight.
- the prestressed spring 73 exercises on the shuttle, via the ramp conical 720 of pusher 72, a radial elastic force Fr including an axial component, developing by application of this elastic force Fr on the surface inclined 81 of the body 80 of the shuttle, constitutes a shuttle axial force Fx 8.
- the cylinder can return to its resting state illustrated in Figure 2 by injecting fluid under pressure in the orifice 23 of the front chamber 12, the piston 3 then coming to bear on the stops 91b for push the shuttle 8 back to its illustrated position in Figure 1.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Actuator (AREA)
- Jib Cranes (AREA)
- Body Structure For Vehicles (AREA)
- Vehicle Body Suspensions (AREA)
Description
- la figure 1 est une vue schématique en coupe d'un vérin conforme à un premier mode de réalisation de l'invention, représenté dans la position de repos du piston et de la tige d'actionnement;
- la figure 2 est une vue schématique en coupe d'un vérin conforme à un premier mode de réalisation de l'invention, représenté dans la position d'arrêt intermédiaire du piston et de la tige d'actionnement;
- la figure 3 est une vue schématique en coupe d'un vérin conforme à un premier mode de réalisation de l'invention, représenté dans la position d'actionnement extrême du piston et de la tige d'actionnement;
- la figure 4 est une vue schématique en coupe d'un vérin conforme à un second mode de réalisation de l'invention, représenté dans la position de repos du piston et de la tige d'actionnement;
- la figure 5 est une vue schématique en coupe d'un vérin conforme à un second mode de réalisation de l'invention, représenté dans la position d'arrêt intermédiaire du piston et de la tige d'actionnement; et
- la figure 6 est une vue schématique en coupe d'un vérin conforme à un second mode de réalisation de l'invention, représenté dans la position d'actionnement extrême du piston et de la tige d'actionnement.
Claims (12)
- Vérin comprenant au moins une première chambre de travail (11) à volume variable délimitée par un cylindre (2) de longueur déterminée (L0), par une première paroi de fond (21) du cylindre, et par une première face (31) d'un piston (3) sélectivement déplacé dans le cylindre (2), depuis une position de repos correspondant à un volume minimal de la première chambre (11) jusqu'à une position extrême, au moyen d'un fluide sous pression injecté dans la première chambre (11), le piston (3) étant prolongé par une tige d'actionnement (4) externe à la première chambre (11) et faisant saillie hors du cylindre (2), caractérisé en ce qu'il comprend un un dispositif de retenue (678), ce dispositif (678) comprenant un carter (6) adjacent à la première paroi de fond (21) et externe à la première chambre (11), des organes de retenue axiale (7) logés dans le carter (6), et une navette (8) adoptant sélectivement un état de repos pour lequel elle est logée dans le carter (6) et quittant sélectivement son état de repos en traversant un passage (61) ouvert entre le carter et la première chambre, en ce qu'il comprend un organe de liaison (5) disposé dans le cylindre (2) et solidaire de la navette (8) , présentant une longueur (L) inférieure à celle (L0) du cylindre et et se solidarisant a son extrêmité inférieure avec le piston (3) , la navette étant placée dans son état de repos au moins lorsque le piston (3) est en position de repos, et déplacée de son état de repos lorsque le piston dépasse une position intermédiaire entre sa position de repos et sa position extrême, et en ce que les organes de retenue axiale (7) exercent sur la navette (8), dans son état de repos, une force de retenue axiale (Fx) d'amplitude limitée s'opposant à un déplacement de la navette (8) hors de son état de repos.
- Vérin suivant la revendication 1, caractérisé en ce qu'il comprend une seconde chambre de travail (12) délimitée par le cylindre (2), par une seconde face (32) du piston (3), et par une seconde paroi de fond (22) du cylindre, cette seconde paroi étant traversée de façon étanche par la tige d'actionnement (4).
- Vérin suivant l'une quelconque des revendications précédentes, caractérisé en ce que l'organe de liaison (5) est monté coulissant de façon étanche à travers le piston (3) entre des première et seconde butées (91a, 91b).
- Vérin suivant l'une quelconque des revendications 1 et 2, caractérisé en ce que la tige d'actionnement (4) est creuse et en ce que l'organe de liaison (5) est monté coulissant dans la tige d'actionnement entre des première et seconde butées (92a, 92b).
- Vérin suivant l'une quelconque des revendications précédentes, caractérisé en ce que l'organe de liaison (5) comprend au moins une tige de liaison rigide.
- Vérin suivant l'une quelconque des revendications précédentes, caractérisé en ce que la navette (8) comprend un corps (80) essentiellement cylindrique et en ce que les organes de retenue axiale (7) comprennent des billes (71a, 71b) sollicitées par une force élastique radiale (Fr) et venant sélectivement en appui, pour une position limite adoptée par la navette (8) au moins lorsque le piston (3) est dans sa position intermédiaire, sur une surface inclinée (81) du corps (80) de la navette.
- Vérin suivant la revendication 6, caractérisé en ce que les organes de retenue axiale (7) comprennent un poussoir (72) essentiellement cylindrique, sollicité axialement dans le carter (6) par un ressort précontraint (73) en direction du piston (3), et présentant une rampe conique (720) qui, au moins dans la position limite de la navette (8), est en appui sur les billes (71a, 71b).
- Vérin suivant la revendication 7, caractérisé en ce que la rampe conique (720) du poussoir (72) s'évase en direction du piston (3) et en ce que la surface inclinée (81) du corps (8) de navette est sensiblement tronconique et converge en direction du piston (3).
- Vérin suivant la revendication 8, caractérisé en ce que le poussoir (72) délimite dans le carter (6) des première et seconde chambres auxiliaires (601, 602), étanches l'une par rapport à l'autre et dont la seconde (602) communique avec la première chambre de travail (11) à travers le passage (61), ce dont il résulte que les billes (71a, 71b) cessent d'être sollicitées contre la surface inclinée (81) du corps (80) de la navette par la force élastique radiale (Fr) lorsque le fluide sous pression injecté dans la première chambre de travail (11) exerce sur le poussoir (72) une force suffisante pour comprimer le ressort précontraint (73).
- Vérin suivant l'une quelconque des revendications 6 à 9, caractérisé en ce que la surface inclinée (81) du corps (8) de navette est transversalement terminée par une face arrière (82) et en ce que les organes de retenue axiale (7) comprennent un noyau épaulé (74), élastiquement sollicité contre la face arrière (82) du corps (80) de navette, et dont une partie antérieure (740) sensiblement cylindrique prend la place de la surface inclinée (81) pour maintenir les billes (71a, 71b) dans la position radiale qu'elles adoptent lorsque la navette (8) quitte son état de repos.
- Vérin suivant l'une quelconque des revendications 7 à 10, caractérisé en ce que les organes de retenue axiale (7) comprennent un appui frontal (62) du carter (6), servant de butée axiale aux billes (71a, 71b).
- Vérin suivant l'une quelconque des revendications précédentes combinée aux revendications 7 et 10, caractérisé en ce que le noyau (74) est monté coulissant dans le poussoir (72) et guidé par lui.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9916384 | 1999-12-23 | ||
FR9916384A FR2802985B1 (fr) | 1999-12-23 | 1999-12-23 | Verin a point d'arret intermediaire |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1111248A1 EP1111248A1 (fr) | 2001-06-27 |
EP1111248B1 true EP1111248B1 (fr) | 2004-05-12 |
Family
ID=9553752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00403557A Expired - Lifetime EP1111248B1 (fr) | 1999-12-23 | 2000-12-15 | Vérin à point d'arrêt intermédiaire |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1111248B1 (fr) |
AT (1) | ATE266815T1 (fr) |
DE (1) | DE60010636D1 (fr) |
FR (1) | FR2802985B1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10307828A1 (de) | 2003-02-24 | 2004-09-02 | Undrau-Anstalt | Mauertafel-Fertigteil-Element sowie Anlage und Verfahren zur Herstellung desselben |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2121874A (en) * | 1931-04-09 | 1938-06-28 | Universal Gear Shift Corp | Servo-motor |
US3614912A (en) * | 1969-09-29 | 1971-10-26 | Lionel Pacific Inc | Telescoping piston central lock hydraulic actuator |
DE2203473C2 (de) * | 1972-01-26 | 1983-07-07 | Pneumo Dynamics Corp., Cleveland, Ohio | Betätigungsvorrichtung für lineare Bewegungen mit Kolbenverriegelung |
DE8812882U1 (de) * | 1988-10-13 | 1989-02-16 | Fa. Otto Grasl, 3452 Heiligeneich | Druckluftzylinder mit Endlageverriegelung, insbesondere zur Betätigung von Rauchabzugsklappen |
-
1999
- 1999-12-23 FR FR9916384A patent/FR2802985B1/fr not_active Expired - Fee Related
-
2000
- 2000-12-15 EP EP00403557A patent/EP1111248B1/fr not_active Expired - Lifetime
- 2000-12-15 AT AT00403557T patent/ATE266815T1/de not_active IP Right Cessation
- 2000-12-15 DE DE60010636T patent/DE60010636D1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP1111248A1 (fr) | 2001-06-27 |
FR2802985B1 (fr) | 2002-03-22 |
DE60010636D1 (de) | 2004-06-17 |
ATE266815T1 (de) | 2004-05-15 |
FR2802985A1 (fr) | 2001-06-29 |
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