FR2623571A1 - Device with double back-to-back telescopic jack - Google Patents
Device with double back-to-back telescopic jack Download PDFInfo
- Publication number
- FR2623571A1 FR2623571A1 FR8716306A FR8716306A FR2623571A1 FR 2623571 A1 FR2623571 A1 FR 2623571A1 FR 8716306 A FR8716306 A FR 8716306A FR 8716306 A FR8716306 A FR 8716306A FR 2623571 A1 FR2623571 A1 FR 2623571A1
- Authority
- FR
- France
- Prior art keywords
- elements
- series
- making
- jack
- common
- 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.)
- Withdrawn
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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
- F15B15/16—Characterised by the construction of the motor unit of the straight-cylinder type of the telescopic type
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
Description
'DESCRIPTION'
La présente invention concerne les vérins hydrauliques télescopiques, simple effet à pistons multiples. Destinés notamment au basculement des bennes semi-remorques à vérin frontal attelées à un tracteur par l'intermédiaire d'une selette supportant l'effort, ils peuvent tout aussi bien s'adapter à toutes sortes d'utilisations du vérin télescopique, entre autres, bennes agricoles, bennes sur camion porteur, mats de chariots élévateurs pour lesquels elle présente d'autres intérêts spécifiques.'DESCRIPTION'
The present invention relates to telescopic hydraulic cylinders, single effect with multiple pistons. Intended in particular for tipping semi-trailers with front cylinders hitched to a tractor via a load-carrying selector, they can just as easily adapt to all kinds of uses of the telescopic cylinder, among others, agricultural tippers, tipper trucks, forklift masts for which it has other specific interests.
Cette invention consiste à réaliser des vérins télescopiques de grande course tout en employant des éléments indépendants de longueur réduite, ceux-ci se déployant par moitié de part et d'autre d'une tige centrale commune aux deux séries d'éléments. This invention consists in making telescopic cylinders of large stroke while using independent elements of reduced length, these deploying in half on either side of a central rod common to the two series of elements.
La tige centrale peut être construite en une seule pièce T (cf. Figure 1), ou en deux éléments T1 & T2 reliés en leur face jointive par l'intermédiaire d'une pièce M (cf.FIG.2) qui assure la liaison. The central rod can be built in a single part T (see Figure 1), or in two elements T1 & T2 connected in their contiguous face by means of a part M (see FIG. 2) which ensures the connection .
Cette pièce M (cf. Fig.2) peut être vissée, soudée, ou être réalisée selon tout autre procédé mécanique de fixation. This part M (see Fig. 2) can be screwed, welded, or made using any other mechanical fixing method.
Lors de la mise en pression du vérin par P qui, dans les figures 1, 2, 3 L & 4, se trouve dans l'axe d'un tourillon, mais dont la position est indifférente sur le corps extérieur du vérin, nous assistons en premier à la sortie simultanée des éléments A & C, puis des éléments B & D, ceux-ci coulissant sur la tige centrale commune T. I1 s'ensuit donc, qu'une fois déployé, ce vérin présente l'effet d'un double empilage d'éléments qui se font face, le plus petit étant au centre comme le représente les figures 3 & 4 qui donnent une vue fermée et ouverte du même vérin. During the pressurization of the cylinder by P which, in Figures 1, 2, 3 L & 4, is located in the axis of a journal, but whose position is indifferent on the external body of the cylinder, we assist first at the simultaneous exit of the elements A & C, then of the elements B & D, these sliding on the common central rod T. I1 therefore follows, that once deployed, this jack has the effect of a double stack of elements which face each other, the smallest being in the center as shown in Figures 3 & 4 which give a closed and open view of the same cylinder.
Les avantages techniques d'un tel systéme sont les suivants
* Le vérin ainsi conçu a, pour une longueur totale donnée, l'avantage d'être réalisé avec des éléments de longueur égale à la moitié de celle-ci. Dans- le cas où la tige centrale est en deux pièces reliées entre elles par un manchon de fixation double fileté, ou autre, la présente invention consiste donc à dire que nous avons réalisé un vérin de grande course en reliant entre eux deux vérins de la 5 course par leur tête ; les tiges centrales étant creuses et communiquantes, une seule alimentation suffit pour rempli les deux chambres d'expansion.The technical advantages of such a system are as follows:
* The jack thus designed has the advantage, for a given total length, of being produced with elements of length equal to half of it. In the case where the central rod is in two parts connected together by a double threaded fixing sleeve, or the like, the present invention therefore consists in saying that we have produced a long-stroke cylinder by connecting two cylinders of the 5 run by their head; the central rods being hollow and communicating, a single supply is sufficient to fill the two expansion chambers.
* Contrairement aux éléments des vérins télescopiques classiques de grande longueur, l'utilisation d'éléments courts, tout en simplifiant la fabrication, permet d'augmenter la résistance aux hautes pressions, d'autant plus que dans ce procédé, les éléments A & B et C & D des figures 1 & 2 sont usinés dans la masse d'un tube. * Unlike the elements of conventional telescopic cylinders of great length, the use of short elements, while simplifying the manufacture, makes it possible to increase the resistance to high pressures, all the more since in this process, the elements A & B and C & D of Figures 1 & 2 are machined in the mass of a tube.
* Sur les différentes figures, nous présentons un vérin fonctionnant en trois expansions, mais le nombre d'éléments coaxiaux n'est pas limitatif ; il peut tout aussi bien n'en comporter que deux, ou à l'inverse, un nombre beaucoup plus important, selon les besoins et les nécessités techniques de réalisation. * In the different figures, we present a cylinder operating in three expansions, but the number of coaxial elements is not limiting; it can just as easily have only two, or conversely, a much larger number, depending on the technical needs and necessities of production.
* Dans le cas du montage d'un tel vérin à l'intérieur d'un mat de chariot élévateur, avec la fonction de soulever la fourche de celui-ci, l'avantage principal concerne le fait que ce vérin présente une longueur fermée réduite au repos (Fig. 5). * In the case of mounting such a cylinder inside a forklift mast, with the function of lifting the fork thereof, the main advantage relates to the fact that this cylinder has a reduced closed length at rest (Fig. 5).
Cela facilite le champ de vision du conducteur. De même, sur la
Figure 6, on voit qu'en position ouverte, le même vérin présente son élément le plus petit en diamètre au centre, et facilite à nouveau le champ de vision, ceci par rapport à un vérin classique.This facilitates the driver's field of vision. Likewise, on the
Figure 6, we see that in the open position, the same cylinder has its smallest element in diameter in the center, and again facilitates the field of vision, this compared to a conventional cylinder.
* Sur la Figure 7, vous retrouverez l'adaptation de ce système de vérin télescopique à pistons multiples employé pour le basculement d'une benne type Travaux Publics à vérin frontal. * On Figure 7, you will find the adaptation of this telescopic jack system with multiple pistons used for the tilting of a Public Works type bucket with front jack.
Les éléments A & B et C & D qui se font opposition autour de leur tige centrale commune permettent une grande course, ceci malgré leur longueur respective réduite.The elements A & B and C & D which are opposed around their common central rod allow a great race, this despite their respective reduced length.
* Le même procédé peut tout aussi bien consister à réaliser ce vérin de grande course en laissant les tiges T de la
Figure 2 libres à chaque extrémité du vérin, ceci en reliant les deux séries d'éléments, étant entendu que dans ce cas, lors de l'extension, ce serai à l'extrémité des tiges T que ce localiseraient les attaches de fixation et de reprise d'effort de ce système de vérin. Pour l'alimentation hydraulique, il suffirai que le fond commun comporte un perçage de liaison entre les deux chambres. Tous les avantages techniques décrits jusqu'ici seraient conservés dans cette autre version proposée. * The same process can just as easily consist in making this long stroke cylinder by leaving the rods T of the
Figure 2 free at each end of the jack, this by connecting the two series of elements, it being understood that in this case, during the extension, it will be at the end of the rods T that this would locate the fasteners and resumption of effort of this jack system. For hydraulic supply, it will suffice that the common bottom includes a connection hole between the two chambers. All the technical advantages described so far would be retained in this other proposed version.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8716306A FR2623571A1 (en) | 1987-11-19 | 1987-11-19 | Device with double back-to-back telescopic jack |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8716306A FR2623571A1 (en) | 1987-11-19 | 1987-11-19 | Device with double back-to-back telescopic jack |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2623571A1 true FR2623571A1 (en) | 1989-05-26 |
Family
ID=9357131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR8716306A Withdrawn FR2623571A1 (en) | 1987-11-19 | 1987-11-19 | Device with double back-to-back telescopic jack |
Country Status (1)
Country | Link |
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FR (1) | FR2623571A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1507941A1 (en) * | 2002-05-29 | 2005-02-23 | Ez Indus Co., Ltd. | Apparatus for driving raising and lowering of lift for tower type storehouse |
EP1652811A1 (en) * | 2004-10-27 | 2006-05-03 | H.S. PENTA S.r.l. | Multistage telescopic cylinder for moving loads |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB812026A (en) * | 1956-08-16 | 1959-04-15 | Distington Engineering Co | Improvements in fluid pressure rams |
FR1424583A (en) * | 1964-12-04 | 1966-01-14 | Dba Sa | Servo-controlled hydraulic cylinder, with variable chamber volume |
FR2160378A1 (en) * | 1972-09-27 | 1973-06-29 | Poclain Sa | |
DE2255049A1 (en) * | 1972-11-10 | 1974-05-22 | Teves Gmbh Alfred | CYLINDER WITH TWO MISCELLANEOUS WORK PISTONS |
-
1987
- 1987-11-19 FR FR8716306A patent/FR2623571A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB812026A (en) * | 1956-08-16 | 1959-04-15 | Distington Engineering Co | Improvements in fluid pressure rams |
FR1424583A (en) * | 1964-12-04 | 1966-01-14 | Dba Sa | Servo-controlled hydraulic cylinder, with variable chamber volume |
FR2160378A1 (en) * | 1972-09-27 | 1973-06-29 | Poclain Sa | |
DE2255049A1 (en) * | 1972-11-10 | 1974-05-22 | Teves Gmbh Alfred | CYLINDER WITH TWO MISCELLANEOUS WORK PISTONS |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1507941A1 (en) * | 2002-05-29 | 2005-02-23 | Ez Indus Co., Ltd. | Apparatus for driving raising and lowering of lift for tower type storehouse |
EP1507941A4 (en) * | 2002-05-29 | 2009-01-14 | Ez Indus Co Ltd | Apparatus for driving raising and lowering of lift for tower type storehouse |
EP1652811A1 (en) * | 2004-10-27 | 2006-05-03 | H.S. PENTA S.r.l. | Multistage telescopic cylinder for moving loads |
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