EP1299212B1 - Hydraulic percussion apparatus - Google Patents
Hydraulic percussion apparatus Download PDFInfo
- Publication number
- EP1299212B1 EP1299212B1 EP01954068A EP01954068A EP1299212B1 EP 1299212 B1 EP1299212 B1 EP 1299212B1 EP 01954068 A EP01954068 A EP 01954068A EP 01954068 A EP01954068 A EP 01954068A EP 1299212 B1 EP1299212 B1 EP 1299212B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cylinder
- distribution box
- pressure
- distribution
- piston
- 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
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D9/00—Portable percussive tools with fluid-pressure drive, i.e. driven directly by fluids, e.g. having several percussive tool bits operated simultaneously
- B25D9/14—Control devices for the reciprocating piston
- B25D9/16—Valve arrangements therefor
- B25D9/20—Valve arrangements therefor involving a tubular-type slide valve
Definitions
- the present invention relates to a hydraulic percussion apparatus.
- a hydraulic percussion apparatus comprises a body, inside which is mounted a cylinder, in which is guided a striking piston alternately driven by an incompressible fluid and striking a tool retained at the lower end of the body.
- the distribution of the fluid ensuring the movement of the piston is performed by a distributor housed in a distribution box mounted in the body.
- the document FR 2 045 289 unveils an example of a hydraulic percussion device.
- the object of the invention is to provide a hydraulic percussion apparatus, wherein the various parts intended to be mounted in a body enclosure are not subject to the constraints. resulting from screw tightening, with the resulting disadvantages that have been defined previously.
- the percussion hydraulic apparatus that it concerns, comprising a body inside which is mounted a cylinder in which is guided a striking piston alternately driven by an incompressible fluid, and from striking a tool retained at the lower end of the body, the distribution of the fluid ensuring the movement of the piston being carried out by a distributor housed in a distribution box mounted in the body, is characterized in that the cylinder and the distribution box are entirely contained in the enclosure bounded by the body, in that the cylinder bears axially on the body, in that the distribution box is mounted coaxially with the cylinder and bears mechanically thereon and in that the surfaces perpendicular to the axis of the apparatus, subjected to pressure, are arranged and dimensioned in such a way that the results of the hydraulic forces applied to the parts, cy lindre and distribution box, are directed in the same direction towards a support located in the body of the device, during all phases of the operating cycle thereof.
- this apparatus also comprises a distribution cover arranged coaxially with the distribution box and bearing axially on it, whose surfaces perpendicular to the axis of the apparatus and subjected to pressure are arranged and dimensioned in such a way that the resultant of the hydraulic forces applied to the cover is directed in the same direction as the resultant of the forces applied to the other parts, cylinder and distribution box, during all phases of the operating cycle of the 'apparatus.
- the support of the body, against which the various parts are hydraulically pushed is constituted by the bottom of the enclosure, located on the side of the tool, in which is mounted the cylinder.
- each part, cylinder, distribution box, distribution cover comprises two opposing surfaces, the first of which is alternately subjected to high and low pressure and the second, of larger surface area than the first, is subjected to permanently at high pressure.
- the end face of the cylinder bearing against the bottom of the body of the body is at atmospheric pressure while its opposite face is still subjected to high pressure.
- the cylinder is thus plated in the bottom of the enclosure of the body.
- the distribution box has two successive cylindrical sections, the one turned on the side of the piston is closed by a bottom delimiting with the piston a chamber alternately connected to the high and the low pressure, and the other section, of greater section than that of the first, is located in a chamber continuously fed with high pressure fluid.
- the dispensing lid has a circular wall whose outer face bears against the inner face of the dispensing box, the inner face of which serves, in part, to guide the dispenser, the lower face of which delimits in part a chamber annular, which is permanently connected to the low pressure circuit, this circular wall ending in a portion of larger section, resting on the end of the distribution box and located in a chamber continuously fed with high pressure fluid.
- the dispensing cover has a circular wall whose outer face bears in a bore of the body, the lower face bears against the upper face of the dispensing box, whose inner face serves , in part, to guide the dispenser and delimits with it a chamber annular, which is permanently connected to the low pressure circuit, this circular wall terminating at its upper end by a portion of larger section, located in a chamber continuously fed with high pressure fluid.
- the apparatus shown in figure 1 comprises a body 1, in which is formed axially a cavity for housing a cylinder 2 bearing against the bottom 5 of the cavity located on the side of a striking tool 40.
- the cylinder 2 serves for the reciprocating guidance of a striking piston 22 intended during each operating cycle to strike the head of the tool 40.
- a distribution box 3 In the upper part of the cylinder 2 is mounted in a central and axial cavity, a distribution box 3 in the upper end of which is mounted a distribution cover 4. Inside the distribution box is mounted a distributor 23 which acts on the supply of the incompressible fluid device to cause reciprocating movement of the piston.
- the striking piston 22 defines with its cylinder two opposing chambers, a lower annular chamber 13 still subjected to the high pressure HP from the channel 17 and an upper chamber 12 is alternately subjected to high and low pressure through the distributor 23 so that the result of the pressures exerted on the striking piston is successively in one direction and then in the other.
- the distribution box delimits with the cylinder an annular chamber 6 always subjected to the low pressure via the channel 16.
- the distributor 23 delimits with the distribution box 3 an annular chamber 14 called control which is alternately in communication with the high (HP) and the low pressure (BP) according to the position of the striking piston 22.
- the distributor 23, the distribution box 3, the distribution cover 4 delimit an annular chamber 15 still subjected to the low pressure via the channel 16.
- the equilibrium of the distribution cover 4 is simple, insofar as the surface 7 delimiting the chamber 15 is systematically at the pressure BP, and the pressure HP in the chamber 26 is exerted on the surface opposite the latter, now and hydraulically the lid 4 pushed down.
- the latter is subjected to the high pressure on its surface 24 (area S 24 ), the surface 6 (area S 6 ) delimited by the distribution box 3 and the cylinder 2 is always subjected to BP pressure, the surface 20 (S 20 area) delimited by the chamber 15 is always subjected to BP pressure, the surface 21 (S 21 area) delimited by the annular chamber 14 is alternately subjected to the HP and BP, the surface 25 (S 25 area) is always subjected to HP pressure, the surface 18 (S 18 area) forming the bottom of the box, and delimited by the upper chamber 12 and the body 2 is alternately subject to HP and BP.
- the distribution box is thus kept hydraulically pushed down by the resultant forces applied.
- the distribution box is constantly maintained hydraulically pushed down by the resultant forces applied.
- the distribution box In all phases of operation, the distribution box is therefore constantly maintained hydraulically pushed towards the cylinder.
- F VS S 5 ⁇ P at ) + HP ⁇ ( S 8 + S 11 + BP ( S 9 + S 10 ) + F B
- the cylinder is thus maintained still hydraulically, pushed down the body 1 by the resultant forces applied.
- the figures 2 , 3 , 4 and 5 represent variants of the apparatus of figure 1 , in which the displacement of the upper driving chamber of the striking piston 22 has been reduced by adding an additional chamber which may be connected, depending on the case, to the atmospheric pressure or to the pressure of the low-pressure return circuit, so that its action on the resultant forces applied to the piston is negligible.
- a driving chamber with a reduced volume allows to obtain high frequencies while maintaining the same input rate, the overall power being maintained by increasing the working pressure.
- a chamber 27 defined by the striking piston and the distribution box has been added. This chamber 27 is constantly connected to the return circuit and therefore to the low pressure via the channel 28.
- the balance of the distribution cover 4 remains unchanged from the figure 1 .
- the equilibrium of the distribution box is modified since the chamber 27 delimits a surface 29 which reduces the effect of the surface 18 by figure 1 . As this surface 29 is always subjected to the low pressure, the distribution box will undergo a resultant of downward forces even greater than in the case of the figure 1 .
- the balance of cylinder 2 with respect to figure 1 follows the evolution of the force F B.
- the figure 3 represents an alternative embodiment of the apparatus of the figure 2 , where the chamber 27 is replaced by a chamber 30 defining a surface 32 of the distribution box always subjected to atmospheric pressure.
- the upper motor chamber 35 is no longer annular and delimits a surface 36 on the distribution box 3, while an annular chamber 33 is created and is delimited by the striking piston 22, the cylinder 1 and the distribution box 3.
- the chamber 33 is constantly connected to the return circuit BP by the channel 34, and the surface 38 which it delimits has the function of increasing the resultant forces which plate down the distribution box, without changing the balance of cylinder 2 and lid 4.
- the figure 5 represents a variant of the apparatus of the figure 4 , where the chamber 33 is replaced by a chamber 37 defining a surface 39 of the distribution box always subjected to atmospheric pressure.
- the figure 6 represents a variant applicable to figures 2 , 3 , 4 and 5 , where the distribution cover 4 is this time guided directly into the cylinder 2 instead of the distribution box 3.
- the different surfaces of the distribution cover and the distribution box are arranged in such a way that the resultants of the forces applied to them are always directed downwards.
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- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
- Actuator (AREA)
- Fish Paste Products (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
Description
La présente invention a pour objet un appareil hydraulique à percussions.The present invention relates to a hydraulic percussion apparatus.
Un appareil hydraulique à percussions comprend un corps, à l'intérieur duquel est monté un cylindre, dans lequel est guidé un piston de frappe entraîné de façon alternative par un fluide incompressible et venant percuter un outil retenu à l'extrémité inférieure du corps. La distribution du fluide assurant le mouvement du piston est réalisée par un distributeur logé dans une boîte de distribution montée dans le corps.A hydraulic percussion apparatus comprises a body, inside which is mounted a cylinder, in which is guided a striking piston alternately driven by an incompressible fluid and striking a tool retained at the lower end of the body. The distribution of the fluid ensuring the movement of the piston is performed by a distributor housed in a distribution box mounted in the body.
Le document
Le document
- la distribution de la pression exercée par le couvercle est totalement dépendante de l'effort de serrage transmis par chaque vis. Or, la mise en tension de vis courtes sur un appareil de travaux publics est généralement réalisée par serrage au couple avec toutes les incertitudes inhérentes à ce type de mise en contrainte : frottements inégaux dans les filetages de vis, précision de l'appareil de serrage.... Une déformation de l'ensemble de guidage du piston de frappe peut donc être engendrée par le serrage du couvercle.
- le couvercle ne peut être à la fois en contact avec les chemises et le corps de l'appareil, le jeu fonctionnel nécessaire pouvant alors entraîner une flexion du couvercle qui répercute une flexion sur les vis, nuisible à leur tenue en fatigue.
- un léger desserrage des vis de fixation du couvercle se traduit par un mouvement relatif des chemises entre elles, une usure des portées, et un désalignement progressif pouvant nuire au guidage hydraulique du piston de frappe.
- the distribution of the pressure exerted by the cover is totally dependent on the clamping force transmitted by each screw. However, the tensioning of short screws on a public works apparatus is generally achieved by torque clamping with all the inherent uncertainties of this type of stressing: uneven friction in the screw threads, accuracy of the clamping apparatus .... A deformation of the guiding assembly of the striking piston can therefore be generated by the tightening of the lid.
- the cover can not both be in contact with the shirts and the body of the device, the necessary functional clearance can then cause a bending of the cover which reflects bending on the screws, harmful to their fatigue resistance.
- a slight loosening of the cover fixing screws results in a relative movement of the shells between them, a wear of the bearing surfaces, and a progressive misalignment which can affect the hydraulic guiding of the striking piston.
Le but de l'invention est de fournir un appareil hydraulique à percussions, dans lequel les différentes pièces destinées à être montées dans une enceinte du corps ne soient pas soumises aux contraintes résultant d'un serrage par vis, avec les inconvénients qui en résultent et qui ont été définis précédemment.The object of the invention is to provide a hydraulic percussion apparatus, wherein the various parts intended to be mounted in a body enclosure are not subject to the constraints. resulting from screw tightening, with the resulting disadvantages that have been defined previously.
A cet effet, l'appareil hydraulique à percussions qu'elle concerne, comprenant un corps à l'intérieur duquel est monté un cylindre dans lequel est guidé un piston de frappe entraîné de façon alternative par un fluide incompressible, et venant percuter un outil retenu à l'extrémité inférieure du corps, la distribution du fluide assurant le mouvement du piston étant réalisée par un distributeur logé dans une boîte de distribution montée dans le corps, est caractérisé en ce que le cylindre et la boîte de distribution sont entièrement contenus dans l'enceinte délimitée par le corps, en ce que le cylindre est en appui axial sur le corps, en ce que la boîte de distribution est montée coaxialement au cylindre et prend appui mécaniquement sur celui-ci et en ce que les surfaces perpendiculaires à l'axe de l'appareil, soumises à la pression, sont agencées et dimensionnées de telle manière que les résultantes des forces hydrauliques appliquées sur les pièces, cylindre et boîte de distribution, soient dirigées dans le même sens en direction d'un appui situé dans le corps de l'appareil, au cours de toutes les phases du cycle de fonctionnement de celui-ci.For this purpose, the percussion hydraulic apparatus that it concerns, comprising a body inside which is mounted a cylinder in which is guided a striking piston alternately driven by an incompressible fluid, and from striking a tool retained at the lower end of the body, the distribution of the fluid ensuring the movement of the piston being carried out by a distributor housed in a distribution box mounted in the body, is characterized in that the cylinder and the distribution box are entirely contained in the enclosure bounded by the body, in that the cylinder bears axially on the body, in that the distribution box is mounted coaxially with the cylinder and bears mechanically thereon and in that the surfaces perpendicular to the axis of the apparatus, subjected to pressure, are arranged and dimensioned in such a way that the results of the hydraulic forces applied to the parts, cy lindre and distribution box, are directed in the same direction towards a support located in the body of the device, during all phases of the operating cycle thereof.
Suivant une forme d'exécution, cet appareil comporte également un couvercle de distribution disposé coaxialement à la boîte de distribution et prenant appui axialement sur celle-ci, dont les surfaces perpendiculaires à l'axe de l'appareil et soumises à la pression sont agencées et dimensionnées de telle manière que la résultante des forces hydrauliques appliquées sur le couvercle soit dirigée dans le même sens que la résultante des forces appliquées sur les autres pièces, cylindre et boîte de distribution, au cours de toutes les phases du cycle de fonctionnement de l'appareil.According to one embodiment, this apparatus also comprises a distribution cover arranged coaxially with the distribution box and bearing axially on it, whose surfaces perpendicular to the axis of the apparatus and subjected to pressure are arranged and dimensioned in such a way that the resultant of the hydraulic forces applied to the cover is directed in the same direction as the resultant of the forces applied to the other parts, cylinder and distribution box, during all phases of the operating cycle of the 'apparatus.
Il ressort de cette structure que les pièces constituées par le cylindre, la boîte de distribution et le couvercle de distribution ne sont pas fixées de façon mécanique par le couvercle du corps, comme tel est le cas habituellement. La valeur du serrage du couvercle sur le corps n'influe donc absolument pas sur la tenue des différentes pièces à l'intérieur du corps, d'une part, et les unes relativement aux autres, d'autre part, puisque ces pièces sont plaquées les unes contre les autres et contre le corps par des forces hydrauliques. Il en résulte la possibilité de disposer de tolérances de fabrication plus larges que dans le cas traditionnel d'assemblage par vissage, tout en bénéficiant d'une meilleure qualité de comportement de l'appareil, puisque l'on évite les risques de déformation du cylindre et de désalignement du guidage du piston de frappe, connus dans la technique antérieure.It follows from this structure that the parts formed by the cylinder, the distribution box and the dispensing cover are not fixed mechanically by the lid of the body, as is the case usually. The value of the tightening of the cover on the body therefore has absolutely no influence on the holding of the different parts inside the body, on the one hand, and relative to each other, on the other hand, since these parts are plated against each other and against the body by hydraulic forces. This results in the possibility of having wider manufacturing tolerances than in the traditional case of assembly by screwing, while enjoying a better quality of behavior of the device, since it avoids the risk of deformation of the cylinder and misalignment of the guidance of the striking piston, known in the prior art.
Suivant une caractéristique de l'invention, l'appui du corps, contre lequel les différentes pièces sont poussées hydrauliquement, est constitué par le fond de l'enceinte, situé du côté de l'outil, dans laquelle est monté le cylindre.According to a characteristic of the invention, the support of the body, against which the various parts are hydraulically pushed, is constituted by the bottom of the enclosure, located on the side of the tool, in which is mounted the cylinder.
Suivant une autre caractéristique, chaque pièce, cylindre, boîte de distribution, couvercle de distribution comporte deux surfaces antagonistes dont la première est soumise alternativement à la haute et à la basse pression et dont la seconde, de plus grande surface que la première, est soumise en permanence à la haute pression.According to another characteristic, each part, cylinder, distribution box, distribution cover comprises two opposing surfaces, the first of which is alternately subjected to high and low pressure and the second, of larger surface area than the first, is subjected to permanently at high pressure.
Selon une forme d'exécution de cet appareil, la face d'extrémité du cylindre en appui contre le fond de l'enceinte du corps est à la pression atmosphérique tandis que sa face opposée est toujours soumise à la haute pression. Le cylindre est ainsi plaqué dans le fond de l'enceinte du corps.According to one embodiment of this device, the end face of the cylinder bearing against the bottom of the body of the body is at atmospheric pressure while its opposite face is still subjected to high pressure. The cylinder is thus plated in the bottom of the enclosure of the body.
Suivant une possibilité, la boîte de distribution possède deux tronçons cylindriques successifs, dont celui tourné du côté du piston est obturé par un fond délimitant avec le piston une chambre reliée alternativement à la haute et à la basse pression, et dont l'autre tronçon, de section supérieure à celle du premier, est situé dans une chambre alimentée en permanence en fluide à haute pression.According to one possibility, the distribution box has two successive cylindrical sections, the one turned on the side of the piston is closed by a bottom delimiting with the piston a chamber alternately connected to the high and the low pressure, and the other section, of greater section than that of the first, is located in a chamber continuously fed with high pressure fluid.
Avantageusement, le couvercle de distribution présente une paroi circulaire dont la face extérieure est en appui contre la face intérieure de la boîte de distribution, dont la face intérieure sert, pour partie, au guidage du distributeur, dont la face inférieure délimite pour partie une chambre annulaire, qui est en permanence reliée au circuit basse pression, cette paroi circulaire se terminant par une partie de plus grande section, reposant sur l'extrémité de la boîte de distribution et située dans une chambre alimentée en permanence en fluide à haute pression.Advantageously, the dispensing lid has a circular wall whose outer face bears against the inner face of the dispensing box, the inner face of which serves, in part, to guide the dispenser, the lower face of which delimits in part a chamber annular, which is permanently connected to the low pressure circuit, this circular wall ending in a portion of larger section, resting on the end of the distribution box and located in a chamber continuously fed with high pressure fluid.
Selon une autre forme d'exécution, le couvercle de distribution présente une paroi circulaire dont la face extérieure est en appui dans un alésage du corps, dont la face inférieure prend appui contre la face supérieure de la boîte de distribution, dont la face intérieure sert, pour partie, au guidage du distributeur et délimite avec celui-ci une chambre annulaire, qui est en permanence reliée au circuit basse pression, cette paroi circulaire se terminant, à son extrémité supérieure, par une partie de plus grande section, située dans une chambre alimentée en permanence en fluide à haute pression.According to another embodiment, the dispensing cover has a circular wall whose outer face bears in a bore of the body, the lower face bears against the upper face of the dispensing box, whose inner face serves , in part, to guide the dispenser and delimits with it a chamber annular, which is permanently connected to the low pressure circuit, this circular wall terminating at its upper end by a portion of larger section, located in a chamber continuously fed with high pressure fluid.
De toute façon, l'invention sera bien comprise à l'aide de la description qui suit, en référence au dessin schématique annexé représentant, à titre d'exemples non limitatifs, plusieurs formes d'exécution de cet appareil :
-
Figure 1 est une vue en coupe longitudinale d'un appareil équipé d'un premier ensemble cylindre-moyen de distribution ; -
Figures 2 à 6 sont des vues en coupe longitudinale de cinq variantes d'exécution de l'appareil defigure 1 .
-
Figure 1 is a longitudinal sectional view of an apparatus equipped with a first cylinder-means of distribution assembly; -
Figures 2 to 6 are longitudinal sectional views of five alternative embodiments of the apparatus offigure 1 .
L'appareil représenté à la
Le piston de frappe 22 délimite avec son cylindre deux chambres antagonistes, une chambre annulaire inférieure 13 toujours soumise à la haute pression HP provenant du canal 17 et une chambre supérieure 12 est alternativement soumise à la haute et à la basse pression par l'intermédiaire du distributeur 23 de manière a ce que la résultante des pressions exercées sur le piston de frappe soit successivement dans un sens puis dans l'autre.The
La boîte de distribution délimite avec le cylindre une chambre annulaire 6 toujours soumise à la basse pression par l'intermédiaire du canal 16.The distribution box delimits with the cylinder an
Le distributeur 23 délimite avec la boîte de distribution 3 une chambre annulaire 14 dite de commande qui est alternativement en communication avec la haute (HP) et la basse pression (BP) en fonction de la position du piston de frappe 22.The
Le distributeur 23, la boîte de distribution 3, le couvercle de distribution 4 délimitent une chambre annulaire 15 toujours soumise à la basse pression par l'intermédiaire du canal 16.The
L'équilibre du couvercle de distribution 4 est simple, dans la mesure où la surface 7 délimitant la chambre 15 est systématiquement à la pression BP, et que la pression HP dans la chambre 26 s'exerce sur la surface opposée a cette dernière, maintenant ainsi hydrauliquement le couvercle 4 poussé vers le bas. Le couvercle exerce donc un effort sur la boîte de distribution Fcouv = (HP - BP)(S7) lorsque le distributeur est en position basse, et Fcouv = (HP - BP)(S7) - (HP - BP)(S40) lorsque le distributeur est en position haute. [HP -BP](S40) représentant la force exercée par le distributeur).The equilibrium of the
Si l'on considère l'équilibre de la boîte de distribution 3, cette dernière est soumise à la haute pression sur sa surface 24 (aire S24), la surface 6 (aire S6) délimitée par la boîte de distribution 3 et le cylindre 2 est toujours soumise à la pression BP, la surface 20 (aire S20) délimitée par la chambre 15 est toujours soumise à la pression BP, la surface 21 (aire S21) délimitée par la chambre annulaire 14 est alternativement soumise à la HP et à la BP, la surface 25 (aire S25) est toujours soumise à la pression HP, la surface 18 (aire S18) formant le fond de la boîte, et délimitée par la chambre supérieure 12 et le corps 2 est alternativement soumise à la HP et à la BP.If we consider the equilibrium of the
Il en résulte quatré possibilités d'équilibres différents de la boîte de distribution 3.This results in four different equilibrium possibilities of the
A la montée du piston, lorsque le distributeur est en position basse :
La résultante F8 des forces appliquées à la boîte de distribution peut s'écrire :
- Fcouv = force exercée par le couvercle sur la boîte
- FDIST = force exercée par le distributeur sur la boîte or d'après la première équation :
donc :
avec St : surface projetée de la vue de dessus de la boîte.The resultant F 8 of the forces applied to the distribution box can be written:
- F couv = force exerted by the lid on the box
- F DIST = force exerted by the distributor on the gold box according to the first equation:
therefore :
with S t : Projected area of the top view of the box.
La boîte de distribution est donc maintenue hydrauliquement poussée vers le bas par la résultante des forces appliquées.The distribution box is thus kept hydraulically pushed down by the resultant forces applied.
De même, à la montée du piston, lorsque le distributeur est en position haute, la section 21 est alors soumise à la pression HP.
or
donc :
gold
therefore :
A la descente du piston, lorsque le distributeur est en position haute, les chambres 14 et 12 sont alors soumises à la pression HP
or
donc :
or
gold
therefore :
gold
La boîte de distribution est constamment maintenue hydrauliquement poussée vers le bas par la résultante des forces appliquées.The distribution box is constantly maintained hydraulically pushed down by the resultant forces applied.
A la descente du piston, lorsque le distributeur est en position basse, la chambre de commande 14 est de nouveau à la BP et la chambre 12 est toujours à la HP.
or
donc :
or
therefore :
gold
Dans toutes les phases du fonctionnement, la boîte de distribution est donc constamment maintenue hydrauliquement poussée vers le cylindre.In all phases of operation, the distribution box is therefore constantly maintained hydraulically pushed towards the cylinder.
Si l'on considère l'équilibre du cylindre 2, ce dernier est soumis à la pression atmosphérique Pa sur toute sa surface inférieure 5 (aire S5), la surface annulaire 8 (appelée aire S8 en projection sur une surface parallèle à la surface 5) est toujours soumise à la pression HP, la surface 9 (aire S9) est soumise à la pression de la chambre 12 (HP à la descente du piston, BP à la montée du piston), la surface 10 (aire S10) est toujours soumise à la pression BP, la surface 11 (aire S11) est toujours soumise à la pression HP. Si l'on appelle respectivement F5, F8, F9, F10, F11, les différentes forces qui s'appliquent au cylindre avec :
- A la montée du piston :
et
- At the rise of the piston:
and
Alors la résultante FC des forces appliquées au cylindre peut s'écrire :
La pression atmosphérique étant négligeable par rapport à la pression HP, on obtient alors :
Si on calcule en statique, on a un quasi-équilibre des forces sur le piston et HP x S8 = BP x S42 d'où
Le cylindre est donc maintenu hydrauliquement, poussé vers le bas par la pression HP.
- A la descente du piston :
F5, F8, F10, F11 restent inchangées,
Dans ce cas,
- At the descent of the piston:
F 5 , F 8 , F 10 , F 11 remain unchanged,
In that case,
Le cylindre est donc maintenu encore hydrauliquement, poussé vers le bas du corps 1 par la résultante des forces appliquées.The cylinder is thus maintained still hydraulically, pushed down the
Les
Dans ces figures, les mêmes éléments sont désignés par les mêmes références qu'à la
Dans la forme d'exécution représentée à la
L'équilibre du couvercle de distribution 4 reste inchangé par rapport à la
L'équilibre de la boîte de distribution est lui modifié puisque la chambre 27 délimite une surface 29 qui vient réduire l'effet de la surface 18 en
La
Dans la forme d'exécution représentée à la
La
La
De la même façon que précédemment, les différentes surfaces du couvercle de distribution et de la boîte de distribution sont agencées de telle manière que les résultantes des forces qui leurs sont appliquées sont toujours dirigées vers le bas.In the same way as before, the different surfaces of the distribution cover and the distribution box are arranged in such a way that the resultants of the forces applied to them are always directed downwards.
Claims (8)
- Percussive hydraulic apparatus comprising a body (1) inside which an impact piston (22) is driven back and forth by an incompressible fluid, the impact piston striking a tool (40) held at the lower end of the body (1), the distribution of the fluid which moves the piston (22) being performed by a distributor (23), the impact piston (22) being guided in a cylinder (2) mounted inside the body (1), the cylinder (2) bearing axially against the body, characterized in that the distributor (23) is housed in a distribution box (3) mounted in the body (1), in that the cylinder (2) and the distribution box (3) are entirely contained in the enclosure delimited by the body (1), in that the distribution box (3) is mounted coaxially with respect to the cylinder and bears mechanically thereon and in that the surfaces perpendicular to the axis of the apparatus, subjected to pressure, are arranged and dimensioned in such a way that the resultants of the hydraulic forces applied to the cylinder and the distribution box, are directed in the same direction toward a support situated in the body (1) of the apparatus, throughout all the phases of the operating cycle thereof.
- Percussive hydraulic apparatus according to Claim 1, characterized in that it comprises a distribution cover (4) arranged coaxially with respect to the distribution box (3) and bearing axially thereon, of which the surfaces perpendicular to the axis of the apparatus and subjected to pressure are arranged and dimensioned in such a way that the resultant of the hydraulic forces applied to the cover (4) is directed in the same direction as the resultant of the forces applied to the cylinder and the distribution box, throughout all the phases of the operating cycle of the apparatus.
- Percussive hydraulic apparatus according to either of Claims 1 and 2, characterized in that the support of the body (1), against which the cylinder and the distribution box are hydraulically pushed, consists of the end wall (5) of the enclosure, on the tool (40) side, in which enclosure the cylinder (22) is mounted.
- Percussive hydraulic apparatus according to either of Claims 1 to 3, characterized in that the cylinder (2), the distribution box (3) and the distribution cover (4) each have at least two antagonist surfaces one of which is subjected alternately to the high and to the low pressure and the other of which, of a larger surface area than the first, is constantly subjected to the high pressure.
- Percussive hydraulic apparatus according to Claim 3, characterized in that the end face of the cylinder (2) bearing against the end wall (5) of the enclosure of the body (1) is at atmospheric pressure while its opposite face (11) is always subjected to the high pressure.
- Percussive hydraulic apparatus according to Claim 4, characterized in that the distribution box (3) has two successive cylindrical portions of which the one facing toward the piston is closed off by an end wall (18) delimiting, with the piston, a chamber (12) connected alternately to the high and to the low pressure, and of which the other portion, which has a larger cross section than the first, is situated in a chamber (26) constantly supplied with high-pressure fluid.
- Percussive hydraulic apparatus according to one of Claims 2 to 6, characterized in that the distribution cover (4) has a circular wall the outer face of which bears against the interior face of the distribution box (3), the interior face of which serves, in part, to guide the distributor, the lower face (7) of which delimits, in part, an annular chamber (15) which is constantly connected to the low-pressure circuit, this circular wall ending in a part of larger cross section resting on the end of the distribution box (3) and situated in a chamber (26) constantly supplied with high-pressure fluid.
- Percussive hydraulic apparatus according to one of Claims 2 to 6, characterized in that the distribution cover (4) has a circular wall the outer face of which bears in a bore of the body (2), the lower face of which bears against the upper face of the distribution box, the interior face of which serves, in part, to guide the distributor (23) and delimits therewith an annular chamber which is constantly connected to the low-pressure circuit, this circular wall ending, at its upper end, in a part of larger cross section situated in a chamber (26) constantly supplied with high-pressure fluid.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0009260 | 2000-07-13 | ||
FR0009260A FR2811602B1 (en) | 2000-07-13 | 2000-07-13 | HYDRAULIC PERCUSSION APPARATUS |
PCT/FR2001/002227 WO2002006013A1 (en) | 2000-07-13 | 2001-07-10 | Hydraulic percussion apparatus |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1299212A1 EP1299212A1 (en) | 2003-04-09 |
EP1299212B1 true EP1299212B1 (en) | 2008-04-23 |
Family
ID=8852519
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01954068A Expired - Lifetime EP1299212B1 (en) | 2000-07-13 | 2001-07-10 | Hydraulic percussion apparatus |
Country Status (18)
Country | Link |
---|---|
US (1) | US6829975B2 (en) |
EP (1) | EP1299212B1 (en) |
JP (1) | JP2004504167A (en) |
KR (1) | KR100758673B1 (en) |
CN (1) | CN1284653C (en) |
AT (1) | ATE392996T1 (en) |
AU (1) | AU7642301A (en) |
BR (1) | BR0112446A (en) |
CA (1) | CA2415358A1 (en) |
DE (1) | DE60133739T2 (en) |
DK (1) | DK1299212T3 (en) |
ES (1) | ES2301556T3 (en) |
FR (1) | FR2811602B1 (en) |
IL (2) | IL153852A0 (en) |
NO (1) | NO319455B1 (en) |
PT (1) | PT1299212E (en) |
WO (1) | WO2002006013A1 (en) |
ZA (1) | ZA200210249B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE528743C2 (en) * | 2005-06-22 | 2007-02-06 | Atlas Copco Rock Drills Ab | Percussion for rock drill, procedure for effecting a reciprocating piston movement and rock drill |
FR2916377B1 (en) * | 2007-05-25 | 2009-07-24 | Montabert Soc Par Actions Simp | METHOD OF PROTECTING AGAINST FLOW SUPPLY OF A DEVICE WITH MUTE PERCUSSIONS BY AN INCOMPRESSIBLE FLUID UNDER PRESSURE AND APPARATUS FOR CARRYING OUT SAID METHOD |
ATE542617T1 (en) * | 2009-06-03 | 2012-02-15 | Feintool Ip Ag | DEVICE AND METHOD FOR PREVENTING BREAKAGE OF A TOOL DURING FINE BLANKING AND/OR FORMING A WORKPIECE |
CN101927479B (en) * | 2009-06-23 | 2014-10-22 | 蒙塔博特公司 | Hydraulic impact equipment |
CN101927478B (en) * | 2009-06-23 | 2015-03-04 | 蒙塔博特公司 | Hydraulic impact equipment |
KR101373544B1 (en) * | 2012-07-03 | 2014-03-25 | 이일재 | Hitting body for hydraulic percussion apparatus |
CN109281604B (en) * | 2018-11-16 | 2024-05-24 | 启东环宇智能设备制造有限公司 | Striking machine core for hydraulic crushing and hydraulic crushing hammer |
CN110219334B (en) * | 2019-04-02 | 2024-05-14 | 台州贝力特机械有限公司 | Hydraulic breaking hammer |
KR102317232B1 (en) * | 2020-01-08 | 2021-10-22 | 주식회사 현대에버다임 | Hydraulic Breaker |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA941264A (en) * | 1970-04-03 | 1974-02-05 | Etablissements Montabert | Dispositif de commande du distributeur d'un appareil a percussions mu par un liquide sous pression |
FR2369908A1 (en) * | 1976-11-08 | 1978-06-02 | Montabert Roger | HYDRAULIC PERCUSSION DEVICE |
JPS5835420Y2 (en) * | 1979-04-18 | 1983-08-09 | 日本ニユ−マチツク工業株式会社 | Impact power tool valve device |
DE3400302A1 (en) * | 1984-01-03 | 1985-08-29 | Mannesmann AG, 4000 Düsseldorf | HYDRAULIC ACTUATOR |
SE9201340L (en) * | 1992-04-29 | 1993-10-30 | Berema Atlas Copco Ab | Striking machine |
FI107891B (en) * | 1998-03-30 | 2001-10-31 | Sandvik Tamrock Oy | Impact fluid driven impactor |
-
2000
- 2000-07-13 FR FR0009260A patent/FR2811602B1/en not_active Expired - Fee Related
-
2001
- 2001-07-10 AT AT01954068T patent/ATE392996T1/en not_active IP Right Cessation
- 2001-07-10 JP JP2002511934A patent/JP2004504167A/en active Pending
- 2001-07-10 DK DK01954068T patent/DK1299212T3/en active
- 2001-07-10 BR BR0112446-3A patent/BR0112446A/en active Search and Examination
- 2001-07-10 IL IL15385201A patent/IL153852A0/en unknown
- 2001-07-10 KR KR1020037000215A patent/KR100758673B1/en active IP Right Grant
- 2001-07-10 WO PCT/FR2001/002227 patent/WO2002006013A1/en active IP Right Grant
- 2001-07-10 DE DE60133739T patent/DE60133739T2/en not_active Expired - Lifetime
- 2001-07-10 EP EP01954068A patent/EP1299212B1/en not_active Expired - Lifetime
- 2001-07-10 AU AU7642301A patent/AU7642301A/en not_active Withdrawn
- 2001-07-10 US US10/297,178 patent/US6829975B2/en not_active Expired - Lifetime
- 2001-07-10 ES ES01954068T patent/ES2301556T3/en not_active Expired - Lifetime
- 2001-07-10 CA CA002415358A patent/CA2415358A1/en not_active Abandoned
- 2001-07-10 PT PT01954068T patent/PT1299212E/en unknown
- 2001-07-10 CN CNB018127231A patent/CN1284653C/en not_active Expired - Fee Related
-
2002
- 2002-12-18 ZA ZA200210249A patent/ZA200210249B/en unknown
-
2003
- 2003-01-08 IL IL153852A patent/IL153852A/en not_active IP Right Cessation
- 2003-01-10 NO NO20030124A patent/NO319455B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2301556T3 (en) | 2008-07-01 |
US6829975B2 (en) | 2004-12-14 |
CN1284653C (en) | 2006-11-15 |
BR0112446A (en) | 2003-06-24 |
ATE392996T1 (en) | 2008-05-15 |
PT1299212E (en) | 2008-05-20 |
NO20030124D0 (en) | 2003-01-10 |
CA2415358A1 (en) | 2002-01-24 |
NO20030124L (en) | 2003-03-04 |
AU7642301A (en) | 2002-01-30 |
US20030183402A1 (en) | 2003-10-02 |
FR2811602A1 (en) | 2002-01-18 |
KR20030031955A (en) | 2003-04-23 |
DE60133739T2 (en) | 2009-05-14 |
IL153852A (en) | 2009-05-04 |
CN1441716A (en) | 2003-09-10 |
DE60133739D1 (en) | 2008-06-05 |
WO2002006013A1 (en) | 2002-01-24 |
DK1299212T3 (en) | 2008-08-11 |
ZA200210249B (en) | 2003-10-31 |
KR100758673B1 (en) | 2007-09-13 |
NO319455B1 (en) | 2005-08-15 |
EP1299212A1 (en) | 2003-04-09 |
IL153852A0 (en) | 2003-07-31 |
FR2811602B1 (en) | 2002-10-11 |
JP2004504167A (en) | 2004-02-12 |
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