EP2788149B1 - Verfahren zum umschalten zwischen den schlaglängen des schlagkolbens eines schlagwerkzeugs - Google Patents

Verfahren zum umschalten zwischen den schlaglängen des schlagkolbens eines schlagwerkzeugs Download PDF

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Publication number
EP2788149B1
EP2788149B1 EP12816695.6A EP12816695A EP2788149B1 EP 2788149 B1 EP2788149 B1 EP 2788149B1 EP 12816695 A EP12816695 A EP 12816695A EP 2788149 B1 EP2788149 B1 EP 2788149B1
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EP
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Prior art keywords
control device
chamber
striking
control
channel
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EP12816695.6A
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English (en)
French (fr)
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EP2788149A1 (de
Inventor
Jean-Sylvain Comarmond
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Montabert SAS
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Montabert SAS
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    • 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
    • B25D9/145—Control devices for the reciprocating piston for hydraulically actuated hammers having an accumulator
    • 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
    • B25D9/18—Valve arrangements therefor involving a piston-type slide valve
    • 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
    • B25D9/26—Control devices for adjusting the stroke of the piston or the force or frequency of impact thereof

Definitions

  • the present invention relates to a method of switching the strike stroke of a striking piston of a percussion apparatus driven by an incompressible fluid under pressure, and a percussion apparatus for carrying out this method.
  • Percussion devices driven by an incompressible fluid under pressure are supplied with fluid, so that the resultant hydraulic forces successively applied to the striking piston, moves it alternately in one direction and then in the other.
  • the striking piston moves alternately inside a cylinder in which are arranged at least two opposing chambers of different sections.
  • One, constantly supplied with pressurized fluid, called the lower chamber ensures the recovery of the striking piston and another antagonist of larger section, called upper chamber, is alternately fed with fluid under pressure during the stroke stroke of the piston. and connected to the low pressure return circuit of the device during the recovery of the striking piston.
  • the lower chamber ensures the recovery of the striking piston
  • another antagonist of larger section called upper chamber
  • the percussion devices are thus generally also provided with a chamber, called a braking chamber, which serves to hydraulically stop the striking stroke of the striking piston when the tool is not resting on the material to be destroyed.
  • a braking chamber which serves to hydraulically stop the striking stroke of the striking piston when the tool is not resting on the material to be destroyed.
  • This braking chamber can be advantageously formed in the extension of the lower chamber.
  • the energy per shot is the kinetic energy given to the striking piston, and depends on the striking stroke and the supply pressure.
  • the hit frequency and the energy per shot suited to the hardness of a given terrain, there are several known solutions described in the documents EP 0 214 064 , EP 0 256 955 , EP 0 715 932 , and FR 2 902 684 in the name of the Claimant.
  • the document EP 0 214 064 discloses an apparatus which makes it possible to obtain an automatic adaptation of the percussion parameters, thanks to the presence in the cylinder of the apparatus of a channel supplied with fluid according to the position of the striking piston after the impact and the eventual rebound of the latter on the tool.
  • the document EP 0 256 955 describes an apparatus which makes it possible to obtain the same result, as a function of the pressure variations in the upper chamber or the lower chamber, consecutive to the rebound effect of the striking piston on the tool, thanks to the presence of a hydraulic element sensitive to these variations.
  • the document EP 0 715 932 describes a simplified system that can equip small and medium power devices. This system consists, during the rebound phase of the impact piston after the impact, to determine the possible existence of an instantaneous flow of fluid flowing from the upper chamber to the feed circuit, and to use this signal to control the percussion parameters, such as typing pressure or frequency of the device.
  • the document FR 2 902 684 describes a method according to the preamble of claim 1 and a percussion apparatus according to the preamble of claim 4 wherein, when the striking piston enters the braking chamber, pressurizing the fluid contained in the chamber of braking allows, thanks to a channel opening into the brake chamber, to control a slide acting on the stroke of the striking piston.
  • the present invention aims to remedy these disadvantages.
  • the technical problem underlying the invention therefore consists in providing a method and an apparatus for implementing it, making it possible to preserve the integrity of the appliance, especially the tool and the keys holding it.
  • the method according to the invention ensures a starting of the percussion apparatus according to a mode of operation with a small impact energy so as to limit the empty strikes on the tool, then, after a predetermined duration, for example a few seconds, allows a mode of operation with maximum impact energy.
  • the method according to the invention thus preserves the integrity of the tool and the keys that hold it, and generally the integrity of the percussion apparatus.
  • the striking piston and the cylinder delimit at least one low chamber permanently connected to a high pressure fluid supply circuit and an upper chamber alternately connected to the high pressure fluid supply circuit and a circuit low pressure return by action of a distributor connected to the control device
  • the control device comprises a first control channel connected to the distributor, and a second control channel opening into the cylinder of the striking piston and arranged to be placed in communication with the lower chamber during the raising stroke of the striking piston, the step of acting on the control device carried out during the predetermined duration of acting on the control device so as to maintain the communication between the first and second channels; control, and the step of acting on the control device performed at the expiration of the predetermined duration of acting on the control device so as to isolate the first and second control channels.
  • the step of acting on the control device carried out after the expiration of the predetermined duration comprises a step of supplying the control device with high pressure fluid by means of a control channel. link provided with a calibrated orifice, so as to move a drawer that includes the control device.
  • the connecting channel is for example connected to the lower chamber.
  • the amount of fluid passing through the calibrated orifice is sufficient to move the drawer in its second position against the action of the return means.
  • This movement of the drawer causes the isolation of the first and second control channels, and thus the control of the operation of the percussion apparatus according to a long strike stroke of the striking piston.
  • the percussion apparatus according to the invention thus makes it possible to ensure, at start-up, a mode of operation with a small impact energy, which limits the empty strikes on the tool, and thus preserves the integrity of the latter. .
  • the return means are advantageously housed in the first chamber of the control device.
  • the first connecting channel is arranged to connect the second chamber of the control device to the lower chamber.
  • the first connecting channel opens on the one hand into the lower chamber and on the other hand into the second chamber of the control device.
  • the first connecting channel opens for example into a first end wall of the cylinder of the control device.
  • the drawer of the control device advantageously comprises an annular groove arranged to put in communication the first and second channels when the drawer is in its first position.
  • the first control channel also opens into the cylinder of the striking piston
  • the second control channel opens into the cylinder of the striking piston between the first control channel and the lower chamber
  • the first connecting channel is permanently connected to the high pressure fluid supply circuit.
  • the percussion apparatus comprises a second connecting channel provided with a calibrated orifice, the second connecting channel being permanently connected to the low pressure return circuit and opening into the first chamber. of the steering device.
  • the percussion apparatus advantageously comprises a filling channel permanently connected to the low pressure return circuit and opening into the first chamber of the control device.
  • the end of the filling channel opening into the first chamber of the control device may for example be arranged to be closed by the drawer of the control device when the drawer is in its second position.
  • the percussion apparatus comprises a second connecting channel opening on the one hand into the first chamber of the control device and on the other hand outside the percussion apparatus.
  • the drawer and the cylinder of the control device preferably further define an annular chamber connected to the low pressure return circuit.
  • the drawer may comprise a passage opening respectively into the first and second chambers of the control device.
  • control device further comprises a first connection channel connected to the first control channel, a second connection channel connected to the second control channel, and a mobile distribution member between a first position wherein the dispensing member communicates the first and second connecting channels, and a second position in which the dispensing member isolates the first and second connecting channels.
  • At least one of the calibrated orifices of the percussion apparatus is formed by a nozzle.
  • the calibrated orifice of the first connecting channel is formed by a nozzle.
  • the percussion apparatus comprises a braking chamber arranged in the extension of the lower chamber, and capable of being closed by a shoulder of the piston when the striking piston exceeds its theoretical position of hit.
  • the hydraulic percussion apparatus shown on the Figures 1 to 3 comprises a stepped striking piston 1 slidably mounted alternately inside a cylinder 2 formed in a body 3 of the apparatus. During each operating cycle, the striking piston 1 is intended to strike against the upper end of a tool 4 slidably mounted in a bore 5 formed in the body 3 coaxially with the cylinder 2.
  • the striking piston 1 and the cylinder 2 define an annular lower chamber 6 and an upper chamber 7 of larger section formed above the striking piston 1.
  • the percussion apparatus further comprises a main distributor 8 mounted in the body 3 arranged to put the upper chamber 7, alternatively in connection with a high pressure fluid supply circuit 9 during the strike stroke of the striking piston 1, or with a low pressure return circuit 11 during the up stroke of the striking piston 1, as shown in FIG. the figure 1 .
  • the lower chamber 6 is continuously supplied with fluid under high pressure by a channel 12, so that each position of the distributor 8 causes the strike stroke of the striking piston 1, then the lift stroke.
  • the channel 12 can be connected to an accumulator 13.
  • the striking piston 1 also defines with the cylinder 2, an annular chamber 14, called the braking chamber, formed in the extension of the lower chamber 6 and supplied with fluid under high pressure by the latter.
  • the braking chamber allows, by the principle of the DASH POT, to dissipate the striking energy of the striking piston 1 when the tool 4 is not close to its theoretical operating position, that is to say resting on the conical portion 15 of the body 3.
  • the percussion apparatus also comprises a control device 16 arranged to vary the strike stroke of the striking piston 1 between a short strike stroke and a long strike stroke and vice versa.
  • the control device 16 comprises a slide 17 mounted in a cylinder 18 formed in the body 3 and into which, axially offset, two control channels 19 and 21 open out into the cylinder 2 of the striking piston 1.
  • the control channel 19 is connected to a control section of the main distributor 8 via an annular groove 22 and a channel 23.
  • the control channel 21 opens into the cylinder 2 between the lower chamber 6 and the control channel 19 , and serves to control the short strike stroke of the striking piston 1.
  • the control channel 21 is more particularly arranged to be placed in communication with the lower chamber 6 during the up stroke of the striking piston 1, as is shown on the figure 2 .
  • the drawer 17 comprises a groove 24 and is movable between a first position (shown on the figure 1 ) in which the groove 24 communicates the control channels 19, 21, and a second position (shown on the figure 3 ) in which the groove 24 isolates the control channels 19, 21.
  • the drawer 17 and the cylinder 18 of the control device 16 define a first chamber 25 in which is located a first face of the drawer 17, and a second chamber 26 in which is located a second face of the drawer 17 opposite the first face.
  • the first chamber 25 houses a return spring 27 arranged to cooperate with the first face of the slide 17 so as to bias the latter towards its first position.
  • the first chamber 25 is permanently connected to the low pressure return circuit 11 by a first connecting channel 28 provided with a calibrated orifice 29, and a second connecting channel 31 also opening into the cylinder 2 of the striking piston.
  • the first connecting channel 28 advantageously opens into a first end wall of the cylinder 18.
  • the percussion apparatus preferably also comprises a filling channel 32 permanently connected to the low-pressure return circuit 11 via the control channel. link 31 and opening into the first chamber 25 of the control device. As shown on the figure 3 , the end of the filling channel 32 opening into the first chamber 25 of the control device is arranged to be closed by the drawer 17 when the latter is in its second position, and to be released when the drawer is in its first position.
  • the second chamber 26 is connected to the lower chamber 6 by a connecting channel 33 provided with a calibrated orifice 34.
  • the connecting channel 33 opens on the one hand into the second chamber 26, and on the other hand into a second wall end of the cylinder 18 of the control device.
  • the striking piston 1 comprises an annular groove 35 in its upper part, and makes it possible to establish, when it is resting on the tool 4, a communication between the low-pressure return circuit 11 and the channel 23 by the intermediate of the channel 31 and the annular groove 35.
  • the distributor 8 is driven by a rising movement when the channel 23 is connected to the low pressure return circuit 11, and a downward movement when the channel 23 is connected to the high-pressure fluid supply circuit 9.
  • the channel 23 makes it possible to control the movements of the distributor 8.
  • pressurized fluid circulates in the high pressure fluid supply circuit 9, and feeds the lower chamber 6 and the second chamber 26 through the connecting channel 33.
  • the resultant forces applied to the striking piston 1 then raises the latter, since the upper chamber 7 is connected to the low-pressure return circuit 11
  • the drawer 17 is, however, maintained in its first position shown in FIG. figure 1 by the action of the spring 27 and due to the presence of the calibrated orifice 34.
  • the annular groove 35 of the striking piston 1 communicates the channel 23 with the low pressure return circuit 11 via the channel 31.
  • the distributor 8 is then moved to the top (see figure 1 ), which causes a communication of the upper chamber 7 with the low pressure return circuit 11. The resultant hydraulic forces applying to the striking piston 1 and causes a rise of the latter.
  • the quantity of fluid passing through the calibrated orifice 34 is sufficient to move the slide 17 in its second position against the action of the spring 27.
  • the oil present in the first chamber 25 is discharged towards the low pressure return circuit 11 via the connecting channel 28 and the calibrated orifice 29.
  • This movement of the slide 17 also causes the isolation of the control channels 19, 21, as shown on the figure 3 .
  • the striking piston 1 must then go up until the edge 36 reaches the position of the annular groove 22 so that the high pressure, present in the lower chamber 6, is also established in the channel 23, and causes the distributor 8 to move towards its lower position so as to connect the upper chamber 7 with the circuit 9.
  • the accumulator 12 maintains a high pressure in the upper chamber 7 during the sudden acceleration of the striking piston 1.
  • the predetermined time to allow a movement of the slide 17 from its first position to its second position can be adjusted for example by adjusting the diameters of the calibrated orifices 29, 34.
  • the lower chamber 6, the connecting channel 33 and the second chamber 26 are decompressed.
  • the spool 17 is then biased towards its first position by the spring 27, which ensures communication between the control channels 19, 21 during the next start of the percussion apparatus, and therefore an operation of the percussion apparatus according to a short strike stroke of the striking piston 1 for the predetermined duration.
  • the filling channel 32 ensures a fluid filling of the first chamber 25 in which the spring 27 is located.
  • FIGS 4 to 6 represent a percussion apparatus according to a second embodiment of the invention which differs from that shown in Figures 1 to 3 essentially in that the first chamber 25 is connected to the open air by a connecting channel 41 opening on the one hand in the first chamber 25 and on the other hand outside the body 3 of the percussion apparatus.
  • the percussion apparatus operates in substantially the same manner as that shown in FIGS. Figures 1 to 3 .
  • the slide 17, pushed by the spring 27, is in its first position in which the annular groove 24 connects the control channels 19, 21.
  • the percussion apparatus then operates in a small stroke stroke, as represented on the figure 5 .
  • the fluid under pressure in the connecting channel 33 passes through the calibrated orifice 34, and progressively pushes the drawer 17, against the action of the spring 27. In the same manner as before, this causes a long stroke operation of the striking piston 1 until the power supply of the percussion apparatus is interrupted.
  • the emptying and filling of the first chamber 25, allowing the last slide 17 to move between its first and second positions is carried out via the connecting channel 41.
  • FIGs 7 to 9 represent a percussion apparatus according to a third embodiment of the invention which differs from that shown in Figures 1 to 3 essentially in that the slide 17 and the cylinder 18 of the control device further define an annular chamber 42 connected to the low-pressure return circuit 11 via a connecting channel 43 and the connecting channel 31, and the drawer comprises a longitudinal passage 44 opening respectively in the first and second chambers 25, 26 of the control device.
  • the percussion apparatus according to this third embodiment operates in substantially the same manner as that shown in FIGS. Figures 1 to 3 .
  • the spool 17 remains for a predetermined duration in its first position in which the annular groove 24 of the spool 17 connects the control channels 19, 21 for operation in short strike stroke of the striking piston 1.
  • the fluid under pressure in the connecting channel 33 passes through the calibrated orifice 34, and progressively pushes the drawer 17 towards its second position, against the action of the spring 27.
  • the annular chamber 42 remains connected to the low-pressure return circuit 11, and the fluid contained in the first chamber 25 flows back through the longitudinal passage 44 towards the second chamber 26.
  • the figure 10 represents a percussion apparatus according to a fourth embodiment of the invention which differs from that shown in FIGS. Figures 1 to 3 essentially in that the control device further comprises a connecting channel 51 connected to the control channel 19, a connecting channel 52 connected to the control channel 21, and a distribution member 53 movable between a first position in which the distribution member 53 communicates the connection channels 51, 52, and a second position in which the dispenser member 53 isolates the connecting channels 51, 52.
  • the dispensing member 53 is more particularly arranged to be moved between its first and second positions depending on the hardness of the material to be demolished.
  • the percussion apparatus comprises for example control means arranged to control the movements of the dispensing member 53 between its first and second positions.
  • the drawer 17 is, as previously, in its first position in which the annular groove 24 of the slider 17 connects the control channels 19, 21 for operation in short strike stroke of the striking piston 1. Then, at the expiration of a predetermined time by adjusting the calibrated orifice 34, the drawer 17 moves to its second position and cuts the communication between the control channels 19, 21. The percussion apparatus can then operate in short or long strike stroke depending on the hardness of the material to be demolished, and more particularly the position of the dispenser member.
  • the invention is not limited to the embodiments of this percussion apparatus, described above as examples, it encompasses all the variants.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (15)

  1. Verfahren zum Umschalten des Hubs des Schlags eines Schlagkolbens (1) eines Schlaggeräts, der von einem nicht komprimierbaren Fluid unter Druck bewegt wird, zwischen einem kurzen Schlaghub und einem langen Schlaghub und umgekehrt, wobei der Schlagkolben (1) abwechselnd innerhalb eines Zylinders (2) eines Körpers (3) des Schlaggeräts verlagerbar ist und eingerichtet ist, um im Laufe jedes Betriebszyklus ein Werkzeug (4) zu schlagen, wobei das Schlaggerät eine Steuervorrichtung (16) umfasst, die eingerichtet ist, um den Schlaghub des Schlagkolbens (1) zwischen dem kurzen und dem langen Schlaghub zu variieren, Umschaltverfahren dadurch gekennzeichnet, dass es Schritte aufweist, die bestehen aus:
    - Ingangsetzen des Schlaggeräts,
    - Einwirken auf die Steuervorrichtung (16) derart, dass ein Betrieb des Schlaggeräts gemäß einem kurzen Schlaghub während einer vorbestimmten Dauer ausgehend von dem Ingangsetzen des Geräts auferlegt wird, und
    - Einwirken auf die Steuervorrichtung (16) derart, dass nach dem Ablaufen der vorbestimmten Dauer ein Betrieb des Geräts mit Schlagen gemäß einem langen Schlaghub gestattet wird.
  2. Umschaltverfahren nach Anspruch 1, wobei der Schlagkolben (1) und der Zylinder (2) mindestens eine untere Kammer (6) abgrenzen, die ständig mit einem Hochdruck-Fluidversorgungskreislauf (9) verbunden ist, und eine obere Kammer (7), die abwechselnd mit dem Hochdruck-Fluidversorgungskreislauf (9) und einem Niederdruck-Rücklaufkreislauf (11) durch Wirken eines Verteilers (8), der mit der Steuervorrichtung (16) verbunden ist, in Verbindung gesetzt wird, und wobei die Steuervorrichtung (16) einen ersten Steuerkanal (19) umfasst, der mit dem Verteiler (8) verbunden ist, und einen zweiten Steuerkanal (21), der in den Zylinder (2) des Schlagkolbens (1) mündet und eingerichtet ist, um mit der unteren Kammer (6) im Laufe des Rückhubs des Schlagkolbens in Verbindung gesetzt zu werden, wobei der Schritt des Einwirkens auf die Steuervorrichtung (16), der während der vorbestimmten Dauer ausgeführt wird, darin besteht, auf die Steuervorrichtung (16) derart einzuwirken, dass die Verbindung zwischen dem ersten und dem zweiten Steuerkanal (19, 21) aufrechterhalten wird, und der Schritt des Einwirkens auf die Steuervorrichtung (16), der beim Ablaufen der vorbestimmten Dauer ausgeführt wird, darin besteht, auf die Steuervorrichtung (16) derart einzuwirken, dass der erste und der zweite Steuerkanal (19, 21) isoliert werden.
  3. Umschaltverfahren nach Anspruch 2, wobei der Schritt des Einwirkens auf die Steuervorrichtung (16), der nach dem Ablaufen der vorbestimmten Dauer ausgeführt wird, einen Schritt umfasst, der darin besteht, die Steuervorrichtung (16) mit Hochdruckfluid durch einen Verbindungskanal (33) zu versorgen, der mit einer kalibrierten Öffnung (34) derart versehen ist, dass ein Schieber (17), den die Steuervorrichtung umfasst, verlagert wird.
  4. Schlaggerät, das von einem nicht komprimierbaren Fluid unter Druck bewegt wird, Folgendes umfassend:
    - einen Schlagkolben (1), der alternativ im Inneren eines Zylinders (2), der in einem Körper (3) des Schlaggeräts eingerichtet ist, bewegbar montiert und eingerichtet ist, um ein Werkzeug (4) im Laufe jedes Betriebszyklus des Schlaggeräts zu schlagen, wobei der Schlagkolben (1) und der Zylinder (2) eine untere Kammer (6) abgrenzen, die ständig mit einem Hochdruck-Fluidversorgungskreislauf (9) verbunden ist, und eine obere Kammer (7),
    - einen Verteiler (8), der eingerichtet ist, um die obere Kammer (7) alternativ mit dem Hochdruck-Fluidversorgungskreislauf (9) und einem Niederdruck-Rücklaufkreislauf (11) in Verbindung zu setzen,
    - eine Steuervorrichtung (16), die eingerichtet ist, um den Schlaghub des Schlagkolbens (1) zwischen einem kurzen Schlaghub und einem langen Schlaghub zu variieren und umgekehrt, wobei die Steuervorrichtung (16) einen Zylinder (18), einen ersten Steuerkanal (19), der in den Zylinder (18) der Steuervorrichtung mündet und mit dem Verteiler (8) verbunden ist, und einen zweiten Steuerkanal (21), der in den Zylinder (18) der Steuervorrichtung und in den Zylinder (2) des Schlagkolbens (1) mündet, umfasst, wobei der zweite Steuerkanal (21) eingerichtet ist, um mit der unteren Kammer (6) im Laufe des Rückhubs des Schlagkolbens (1) in Verbindung gesetzt zu werden, wobei die Steuervorrichtung außerdem einen Schieber (17) umfasst, der in dem Zylinder (18) der Steuervorrichtung zwischen einer ersten Position, in der der Schieber (17) den ersten und den zweiten Steuerkanal (19, 21) in Verbindung setzt, und einer zweiten Position, in der der Schieber (17) den ersten und den zweiten Steuerkanal (19, 21) isoliert, beweglich montiert ist, wobei der Schieber (17) und der Zylinder (18) der Steuervorrichtung mindestens eine erste Kammer (25) abgrenzen, in der eine erste Seite des Schiebers (17) liegt, und eine zweite Kammer (26), in der eine zweite Seite des Schiebers (17), die der ersten Seite entgegengesetzt ist, liegt,
    dadurch gekennzeichnet, dass das Schlaggerät umfasst:
    - Rückstellmittel (27), die eingerichtet sind, um mit der ersten Seite des Schiebers (17) der Steuervorrichtung derart zusammenzuwirken, dass der Schieber zu seiner ersten Position beansprucht wird, und
    - einen ersten Verbindungskanal (33), der eingerichtet ist, um die zweite Kammer (26) der Steuervorrichtung mit dem Hochdruck-Fluidversorgungskreislauf (9) zu verbinden, wobei der erste Verbindungskanal (33) mit einer kalibrierten Öffnung (34) versehen ist.
  5. Schlaggerät nach Anspruch 4, wobei der erste Verbindungskanal (33) eingerichtet ist, um die zweite Kammer (26) der Steuervorrichtung mit der unteren Kammer (6) zu verbinden.
  6. Schlaggerät nach Anspruch 5, wobei der erste Verbindungskanal (33) einerseits in die untere Kammer (6) und andererseits in die zweite Kammer (26) der Steuervorrichtung mündet.
  7. Schlaggerät nach einem der Ansprüche 4 bis 6, wobei der Schieber (17) der Steuervorrichtung eine ringförmige Hohlkehle (24) umfasst, die eingerichtet ist, um den ersten und den zweiten Kanal (19, 21) in Verbindung zu setzen, wenn der Schieber (17) in seiner ersten Position ist.
  8. Schlaggerät nach einem der Ansprüche 4 bis 7, wobei der erste Steuerkanal (19) auch in den Zylinder (2) des Schlagkolbens (1) mündet, und der zweite Steuerkanal (21) in den Zylinder (2) des Schlagkolbens (1) zwischen dem ersten Steuerkanal (19) und der unteren Kammer (6) mündet.
  9. Schlaggerät nach einem der Ansprüche 4 bis 8, das einen zweiten Verbindungskanal (28) umfasst, der mit einer kalibrierten Öffnung (29) versehen ist, wobei der zweite Verbindungskanal (28) ständig mit dem Niederdruck-Rücklaufkreislauf (11) verbunden ist und in die erste Kammer (25) der Steuervorrichtung mündet.
  10. Schlaggerät nach Anspruch 9, das einen Füllkanal (32) umfasst, der ständig mit dem Niederdruck-Rücklaufkreislauf (11) verbunden ist und in die erste Kammer (25) der Steuervorrichtung mündet.
  11. Schlaggerät nach Anspruch 10, wobei das Ende des Füllkanals (32), der in die erste Kammer (25) der Steuervorrichtung mündet, eingerichtet ist, um von dem Schieber (17) der Steuervorrichtung verschlossen zu werden, wenn der Schieber (17) in seiner zweiten Position ist.
  12. Schlaggerät nach einem der Ansprüche 4 bis 8, das einen zweiten Verbindungskanal (43) umfasst, der einerseits in die erste Kammer (25) der Steuervorrichtung und andererseits außerhalb des Schlaggeräts mündet.
  13. Schlaggerät nach einem der Ansprüche 4 bis 8, wobei der Schieber und der Zylinder der Steuervorrichtung außerdem eine ringförmige Kammer abgrenzen, die mit dem Niederdruck-Rücklaufkreislauf verbunden ist.
  14. Schlaggerät nach einem der Ansprüche 4 bis 8 oder nach Anspruch 13, wobei der Schieber (17) eine Passage (44) umfasst, die jeweils in die erste und zweite Kammer (25, 26) der Steuervorrichtung mündet.
  15. Schlaggerät nach einem der Ansprüche 4 bis 14, wobei die Steuervorrichtung (16) außerdem einen ersten Anschlusskanal (51) umfasst, der mit dem ersten Steuerkanal (19) verbunden ist, einen zweiten Anschlusskanal (52), der mit dem zweiten Steuerkanal (21) verbunden ist, und ein Verteilungsorgan (53), das zwischen einer ersten Position, in der das Verteilungsorgan (53) den ersten und den zweiten Anschlusskanal (51, 52) in Verbindung setzt, und einer zweiten Position, in der das Verteilungsorgan (53) den ersten und den zweiten Anschlusskanal (51, 52) isoliert, beweglich ist.
EP12816695.6A 2011-12-09 2012-12-03 Verfahren zum umschalten zwischen den schlaglängen des schlagkolbens eines schlagwerkzeugs Active EP2788149B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1161366A FR2983760B1 (fr) 2011-12-09 2011-12-09 Procede de commutation de la course de frappe d'un piston de frappe d’un appareil a percussions
PCT/FR2012/052775 WO2013083903A1 (fr) 2011-12-09 2012-12-03 Procédé de commutation de la course de frappe d'un piston de frappe d'un appareil à percussions

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EP2788149B1 true EP2788149B1 (de) 2017-07-05

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EP (1) EP2788149B1 (de)
KR (1) KR101983614B1 (de)
CN (2) CN104023918B (de)
ES (1) ES2641462T3 (de)
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WO (1) WO2013083903A1 (de)

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FR3007154B1 (fr) * 2013-06-12 2015-06-05 Montabert Roger Procede de commande de l’energie d’impact d’un piston de frappe d’un appareil a percussions
FR3027543B1 (fr) * 2014-10-28 2016-12-23 Montabert Roger Appareil a percussions
US20160221171A1 (en) * 2015-02-02 2016-08-04 Caterpillar Inc. Hydraulic hammer having dual valve acceleration control system
JP6713778B2 (ja) * 2016-01-19 2020-06-24 古河ロックドリル株式会社 液圧式打撃装置
US10562165B2 (en) * 2016-04-10 2020-02-18 Caterpillar Inc. Hydraulic hammer
KR101780154B1 (ko) * 2016-07-27 2017-09-20 대모 엔지니어링 주식회사 유압식 타격 기기 및 이를 포함하는 건설 장비
EP3508308B1 (de) * 2016-08-31 2022-08-17 Furukawa Rock Drill Co., Ltd. Hydraulische schlagvorrichtung
FR3057483B1 (fr) * 2016-10-14 2019-04-19 Montabert Appareil a percussions pourvu d’un palier de guidage equipe d’un dispositif de centrage
EP3659752B1 (de) * 2017-07-24 2023-04-19 Furukawa Rock Drill Co., Ltd. Hydraulische hammervorrichtung
FR3077753B1 (fr) * 2018-02-14 2020-01-31 Montabert Procede de reglage de la course de frappe d’un piston de frappe d’un appareil a percussions, et un appareil a percussions pour la mise en œuvre de ce procede
FR3094658B1 (fr) * 2019-04-03 2021-03-19 Montabert Roger Appareil à percussions avec régulation automatique de la pression d’alimentation de l’appareil à percussions
JP7359584B2 (ja) * 2019-07-23 2023-10-11 古河ロックドリル株式会社 液圧式打撃装置
CA3235407A1 (en) 2021-10-21 2023-04-27 Univation Technologies, Llc Bimodal poly(ethylene-co-1-alkene) copolymer and blow-molded intermediate bulk containers made therefrom
WO2024081272A1 (en) 2022-10-11 2024-04-18 Dow Global Technologies Llc Bimodal hdpe and polyethylene blend containing virgin and recycled hdpe materials
WO2024081271A1 (en) 2022-10-11 2024-04-18 Dow Global Technologies Llc Polyethylene blends containing virgin and recycled hdpe materials

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Also Published As

Publication number Publication date
CN105690328A (zh) 2016-06-22
FR2983760B1 (fr) 2014-08-15
KR101983614B1 (ko) 2019-05-29
CN104023918A (zh) 2014-09-03
FR2983760A1 (fr) 2013-06-14
US20140326473A1 (en) 2014-11-06
CN105690328B (zh) 2018-03-20
EP2788149A1 (de) 2014-10-15
US9981371B2 (en) 2018-05-29
CN104023918B (zh) 2016-08-17
ES2641462T3 (es) 2017-11-10
WO2013083903A1 (fr) 2013-06-13
KR20140099496A (ko) 2014-08-12

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