FR2593533A1 - Improvements to hydraulic demolition shearing machines - Google Patents

Improvements to hydraulic demolition shearing machines Download PDF

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Publication number
FR2593533A1
FR2593533A1 FR8601009A FR8601009A FR2593533A1 FR 2593533 A1 FR2593533 A1 FR 2593533A1 FR 8601009 A FR8601009 A FR 8601009A FR 8601009 A FR8601009 A FR 8601009A FR 2593533 A1 FR2593533 A1 FR 2593533A1
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Prior art keywords
plate
jaw
movable jaw
jaws
fixed jaw
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FR8601009A
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French (fr)
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FR2593533B1 (en
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Gilles Poncin
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Individual
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Individual
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Priority to FR8601009A priority Critical patent/FR2593533B1/en
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Publication of FR2593533B1 publication Critical patent/FR2593533B1/en
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Expired - Lifetime legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F3/00Dredgers; Soil-shifting machines
    • E02F3/04Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/96Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements
    • E02F3/965Dredgers; Soil-shifting machines mechanically-driven with arrangements for alternate or simultaneous use of different digging elements of metal-cutting or concrete-crushing implements

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Crushing And Grinding (AREA)

Abstract

Hydraulic demolition shearing machine of the type comprising a plate 1 mounted rotationally at the end of an articulated supporting arm 1, the said plate 1 carrying a fixed jaw 2 on which there is articulated a movable jaw 4 by means of a spindle 3, the said movable jaw being actuated by a jack placed between the fixed jaw 2 and the movable jaw 4 and of the spindle 3 so as to act in a direction which is substantially parallel to the bisector of the angle formed by the two jaws 2, 4 in the open position.

Description

Perfectionnements aux cisailles hydrauliques de démolition. Improvements to the hydraulic shears of demolition.

La présente invention a pour objet des perfectionnements aux cisailles hydrauliques de démolition. The present invention relates to improvements to hydraulic shears demolition.

I1 est connu pour procéder aux travaux de démolition d'employer des outils de cisaillage pour couper sur place des éléments de charpente ou de construction en béton. Ces appareils, qui sont placés en bout de bras articulés de pelles hydrauliques, à la place des godets ou griffes développent des forces de coupe considérables,de plusieurs centaines de tonnes et doivent être donc d'une très grande robustesse, de sorte qu'ils sont extrêmement lourds. Ils sont en général constitués par une mâchoire fixe sur laquelle est articulée une mâchoire mobile, la mâchoire fixe étant elle-même portée par une platine circulaire montée sur une couronne å galets de façon que l'on puisse orienter à volonté la cisaille. It is known to carry out demolition work to use shearing tools to cut concrete or concrete construction elements on site. These devices, which are placed at the end arm articulated hydraulic excavators, instead of buckets or claws develop considerable cutting forces, several hundred tons and must be very robust, so they are extremely heavy. They are generally constituted by a fixed jaw on which is articulated a movable jaw, the fixed jaw being itself carried by a circular plate mounted on a crown - pebbles so that one can direct the shear at will.

Dans les cisailles de type connu, le vérin hydraulique est articulé entre l'axe d'-articulation de la mâchoire mobile et la platine ce qui oblige à disposer ledit axe d'articulation assez loin de la platine et donc à avoir un porte-a-faux important qui a son tour nécessite un renforcement des éléments porteurs et donc une augmentation du poids. In shears of known type, the hydraulic cylinder is articulated between the axis of articulation of the movable jaw and the plate which forces to dispose said hinge axis far enough from the plate and thus to have a door-a -fail important which in turn requires strengthening of the carrier elements and therefore an increase in weight.

La présente invention a pour objet un mode de réalisation de cisailles de ce type qui permet de les rendre à la fois plus légères, moins encombrantes, plus facile à fabriquer et plus performantes en couple de cisaillage. The present invention relates to an embodiment of shears of this type which makes them both lighter, less bulky, easier to manufacture and more efficient in shearing torque.

A titre d'exemple, on a représenté sur les dessins annexés
Figure 1, une vue en élévation latérale d'une cisaille de type connu
FiSure 2, une vue en élévation latérale d'une cisaille perfectionnée selon l'invention ;
Figures 3 et 4, deux diagrammes illustrant la variation du couple de cisaillage dans la réalisation connue de la figure i
Figures 5 et 6, deux diagrammes illustrant la variation de ce couple dans la réalisation selon la présente invention.
By way of example, there is shown in the accompanying drawings
Figure 1, a side elevational view of a known type of shears
FiSure 2, a side elevational view of an improved shear according to the invention;
FIGS. 3 and 4, two diagrams illustrating the variation of the shearing torque in the known embodiment of FIG.
Figures 5 and 6, two diagrams illustrating the variation of this pair in the embodiment according to the present invention.

En se reportant à la figure 1, on voit que, dans un dispositif de type connu, la platine 1 qui est montée sur une couronne à galets, non représentée, de façon à pouvoir pivoter autour de l'axe XX' . Cette platine 1 porte la machoire fixe 2 qui, elle-même, porte un axe 3, sur lequel est articulée une mâchoire mobile 4, solidaire d'un levier 5 articulé par un axe 6 à un vérin 7 monté à pivotement sur un palier 8 solidaire de la mâchoire 2. Referring to Figure 1, we see that in a device of known type, the plate 1 which is mounted on a roller ring, not shown, so as to be pivotable about the axis XX '. This plate 1 carries the fixed jaw 2 which, itself, carries an axis 3, on which is articulated a movable jaw 4, integral with a lever 5 articulated by an axis 6 to a cylinder 7 pivotally mounted on a bearing 8 secured to the jaw 2.

On voit que, du fait que le vérin 7 est placé entre la platine 2 et l'axe 3 ce dernier doit être placé à une distance "d" de la platine qui est relativement importante. Le centre de gravité de la cisaille étant situé sensiblement à hauteur de l'axe 3, on voit que cette distance "d" engendre un porte-a-faux important qui, du fait du poids considérable de la cisaille, risque de déséquilibrer l'engin porteur et de le faire basculer. We see that, since the cylinder 7 is placed between the plate 2 and the axis 3 it must be placed at a distance "d" of the plate which is relatively important. The center of gravity of the shear being located substantially at the height of the axis 3, we see that this distance "d" generates a significant cantilever which, because of the considerable weight of the shears, may unbalance the carrying craft and toppling it.

En se reportant à la figure 2, on voit que le vérin 11 n'est plus placé entre la platine 2 et l'axe 3, mais est placé au-dessus. A cette fin, la mâchoire 2 porte une console 9 sur laquelle le vérin 11 est articulé ; la tige du vérin 11 étant articulée sur une ou deux pattes 10 portées par la machoire mobile 4. Referring to Figure 2, we see that the cylinder 11 is no longer placed between the plate 2 and the axis 3, but is placed above. To this end, the jaw 2 carries a console 9 on which the cylinder 11 is hinged; the rod of the jack 11 being articulated on one or two lugs 10 carried by the movable jaw 4.

Dans ce cas le vérin 11 est sensiblement parallèle à la bissectrice de l'angle fait par les mâchoires 2 et 4 en positions ouvertes.In this case the cylinder 11 is substantially parallel to the bisector of the angle made by the jaws 2 and 4 in the open positions.

Cette disposition permet de réduire considérablement l'importance de la distance "d" et donc le porte-à-faux de l'ensemble. This arrangement considerably reduces the importance of the distance "d" and therefore the overhang of the assembly.

Par ailleurs cette disposition permet de disposer deux vérins 11 de dimensions usuelles au lieu d'un vérin 7 de forme spéciale, comme cela est nécessaire dans le cas de la figure 1. Cela permet une économie considérable car un gros vérin tel que le vérin 7 , qui est nécessaire pour le dispositif connu, coûte environ dix fois plus cher qu'un vérin 11 de dimensions standard tel que ceux qui sont nécessaires pour la disposition selon l'invention. Moreover, this arrangement makes it possible to arrange two cylinders 11 of usual dimensions instead of a cylinder 7 of special shape, as is necessary in the case of FIG. 1. This allows a considerable economy since a large cylinder such as the cylinder 7 , which is necessary for the known device, costs about ten times more expensive than a cylinder 11 of standard dimensions such as those necessary for the arrangement according to the invention.

De préférence, les deux vérins 11 de la figure 2 sont articulés aux pièces 9 et 10 par des rotules, ce qui permet de supporter les déformations élastiques du bati et des jeux d'axes. Cette disposition permet donc la suppression des deux paliers 8 placés de chaque côté du vérin 7, ces paliers étant très lourds et demandant un usinage spécial du bâti 2. Preferably, the two cylinders 11 of Figure 2 are hinged to the parts 9 and 10 by ball joints, which allows to withstand the elastic deformations of the frame and sets of axes. This arrangement therefore allows the removal of the two bearings 8 placed on each side of the cylinder 7, these bearings being very heavy and requiring special machining of the frame 2.

Comme cela est représenté à la figure 2, en inclinant le plan de la platine 1 par rapport à la bissectrice de l'angle faite par les deux mâchoires en position ouverte, on réduit encore un peu plus la valeur de la distance "d" . Cette disposition permet de réaliser la mâchoire fixe 2 en une pièce simple unique alors que dans les dispositifs connus < figure 1 > la mâchoire 2 est faite de deux pièces symétriques entre lesquelles est placé le cylindre 7. As shown in Figure 2, tilting the plane of the plate 1 relative to the bisector of the angle made by the two jaws in the open position, further reduces the value of the distance "d". This arrangement makes it possible to produce the fixed jaw 2 in a single single piece while in the known devices <FIG. 1> the jaw 2 is made of two symmetrical pieces between which the cylinder 7 is placed.

Les figures 3 à 6 illustrent la décomposition des forces en action dans le cas du dispositif connu (figures 3 et 4 > et dans le cas du dispositif selon l'invention (figures 5 et 6). On voit que dans le cas des cisailles de type connu,le couple de cisaillage est maximum à l'ouverture maximum des mâchoires et décroît de façon continue, d'environ 15 %, jusqu'à la fermeture des machoires. Par contre dans le dispositif selon l'invention , il n'y a qu'une très faible variation du couple de cisaillage et sa valeur maximum correspond au milieu de la course. Ainsi en appliquant la force du vérin dans une direction sensiblement parallèle à la bissectrice de l'angle fait par les mâchoires 1 et 4 en positions ouvertes, on obtient un couple de cisaillement plus efficace.  Figures 3 to 6 illustrate the decomposition of forces in action in the case of the known device (Figures 3 and 4> and in the case of the device according to the invention (Figures 5 and 6). known type, the shearing torque is maximum at the maximum opening of the jaws and decreases continuously, by about 15%, until the closure of the jaws, whereas in the device according to the invention, there is a very small variation of the shearing torque and its maximum value corresponds to the middle of the stroke.Thus by applying the force of the jack in a direction substantially parallel to the bisector of the angle made by the jaws 1 and 4 in the positions open, we obtain a more efficient shearing torque.

Claims (5)

Revendicationsclaims 1. Cisaille hydraulique de démolition du type comportant une platine (1) montée à rotation à l'extrémité d'un bras porteur articulé, ladite platine (i > portant une mâchoire fixe (2 > sur laquelle est articulée une mâchoire mobile (4) au moyen d'un axe (3 > , ladite mâchoire mobile étant actionnée par un vérin disposé entre la mâchoire fixe (2) et la mâchoire mobile < 4 > , caractérisée par le fait que ledit vérin (11 > est disposé au-dessus de la mâchoire mobile (4 > et de l'axe (3 > de façon à agir dans une direction sensiblement parallèle à la bissectrice de l'angle formé par les deux mâchoires (2, 4) en position ouverte. 1. Demolition hydraulic shear of the type comprising a plate (1) rotatably mounted at the end of an articulated support arm, said plate (i> carrying a fixed jaw (2> on which is articulated a movable jaw (4) by means of an axis (3>, said movable jaw being actuated by a jack arranged between the fixed jaw (2) and the movable jaw <4>, characterized in that said jack (11> is arranged above the movable jaw (4> and the axis (3> so as to act in a direction substantially parallel to the bisector of the angle formed by the two jaws (2, 4) in the open position. 2. Cisaille selon la revendication 1 dans laquelle le vérin < 11 > ( es est porté par une console (9) disposé au-dessus de la mâchoire fixe (2?.  2. Shear according to claim 1 wherein the jack <11> (es is carried by a bracket (9) disposed above the fixed jaw (2 ?. 3. Cisaille selon la revendication 2 dans laquelle le vérin (11 > est dédoublé en deux vérins symétriques situés de part et d'autre d'une plaque unique constituant la mâchoire fixe (2).  3. Shear according to claim 2 wherein the cylinder (11> is split into two symmetrical cylinders located on either side of a single plate constituting the fixed jaw (2). 4. Cisaille selon la revendication 3, dans laquelle les vérins (11) sont attelés aux mâchoires par des joints à rotule. 4. Shear according to claim 3, wherein the cylinders (11) are coupled to the jaws by ball joints. 5. Cisaille selon l'une quelconque des revendications 1 à 4,dans laquelle la platine (1) est inclinée par rapport à la bissectrice de l'angle fait par les deux mâchoires en position ouverte.  5. Shear according to any one of claims 1 to 4, wherein the plate (1) is inclined relative to the bisector of the angle made by the two jaws in the open position.
FR8601009A 1986-01-24 1986-01-24 IMPROVEMENTS ON DEMOLITION HYDRAULIC SHEARS. Expired - Lifetime FR2593533B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8601009A FR2593533B1 (en) 1986-01-24 1986-01-24 IMPROVEMENTS ON DEMOLITION HYDRAULIC SHEARS.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR8601009A FR2593533B1 (en) 1986-01-24 1986-01-24 IMPROVEMENTS ON DEMOLITION HYDRAULIC SHEARS.

Publications (2)

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FR2593533A1 true FR2593533A1 (en) 1987-07-31
FR2593533B1 FR2593533B1 (en) 1992-04-03

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FR8601009A Expired - Lifetime FR2593533B1 (en) 1986-01-24 1986-01-24 IMPROVEMENTS ON DEMOLITION HYDRAULIC SHEARS.

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FR (1) FR2593533B1 (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2140880A5 (en) * 1971-06-08 1973-01-19 Cornu Georges Ets
GB2024042A (en) * 1978-06-23 1980-01-09 Watanabe Kaitai Kogyo Kk Methods and devices for demolition of structures
US4403431A (en) * 1982-07-19 1983-09-13 Michael Ramun Self-contained material handling and shearing attachment for a backhoe
DE8516380U1 (en) * 1985-06-05 1985-07-18 Wack, Helmut, 6653 Blieskastel Demolition shears
GB2157215A (en) * 1983-06-08 1985-10-23 Dudley Shearing Machine Manufa Shear apparatus

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2140880A5 (en) * 1971-06-08 1973-01-19 Cornu Georges Ets
GB2024042A (en) * 1978-06-23 1980-01-09 Watanabe Kaitai Kogyo Kk Methods and devices for demolition of structures
US4403431A (en) * 1982-07-19 1983-09-13 Michael Ramun Self-contained material handling and shearing attachment for a backhoe
GB2157215A (en) * 1983-06-08 1985-10-23 Dudley Shearing Machine Manufa Shear apparatus
DE8516380U1 (en) * 1985-06-05 1985-07-18 Wack, Helmut, 6653 Blieskastel Demolition shears

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FR2593533B1 (en) 1992-04-03

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