EP2489476A1 - Drill support for a hammer drill - Google Patents

Drill support for a hammer drill Download PDF

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Publication number
EP2489476A1
EP2489476A1 EP20120150866 EP12150866A EP2489476A1 EP 2489476 A1 EP2489476 A1 EP 2489476A1 EP 20120150866 EP20120150866 EP 20120150866 EP 12150866 A EP12150866 A EP 12150866A EP 2489476 A1 EP2489476 A1 EP 2489476A1
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EP
European Patent Office
Prior art keywords
spring
drill
hydraulic cylinder
support
pressure chamber
Prior art date
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Granted
Application number
EP20120150866
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German (de)
French (fr)
Other versions
EP2489476B1 (en
Inventor
Stefan Götzfried
Konrad Artmann
Michael Bayerl
Harald Streicher
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Hilti AG
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Hilti AG
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Application filed by Hilti AG filed Critical Hilti AG
Priority to PL12150866T priority Critical patent/PL2489476T3/en
Publication of EP2489476A1 publication Critical patent/EP2489476A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/28—Supports; Devices for holding power-driven percussive tools in working position
    • B25D17/30—Pillars and struts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/24—Damping the reaction force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/24—Damping the reaction force
    • B25D17/245—Damping the reaction force using a fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/125—Hydraulic tool components
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/371—Use of springs

Definitions

  • the invention relates to a drill support for a hammer drill according to the preamble of claim 1.
  • a drill support is formed with a foot for placement on the ground, a holder for the hammer drill, and a telescopic hydraulic cylinder with which the holder relative to the foot in the axial direction displaceable is, wherein in the telescopic hydraulic cylinder at least one pressure chamber is arranged, which is acted upon for extending the telescopic hydraulic cylinder with hydraulic fluid.
  • Such drill supports are, for example, from AT 226174 known. They are used inter alia in underground mining in the production of blasting holes and serve to generate at least a portion of the contact pressure of the hammer drill and / or support the hammer drill.
  • the drilling performance that can be achieved using hydraulically operated drill supports may be less than the drilling performance that can be achieved using comparable pneumatically operated drill supports, particularly at low contact forces under the drilling performance, in particular, the achievable propulsion per unit time can be understood).
  • the object of the invention is to provide a drill support, with the particularly simple design and very high reliability, a particularly good drilling performance can be achieved.
  • An inventive drill support is characterized in that it comprises at least one spring means for axially cushioning the holder relative to the foot.
  • a basic idea of the invention can be seen in the force curve between the holder for the hammer drill and the foot to provide a spring device which cooperates with the hydraulic cylinder.
  • This spring device can absorb elastically in the axial direction directed changes in length of the drill support between the bracket and foot.
  • the invention has recognized that the increased drilling performance observed with pneumatic jacking supports may be due to a spring action which occurs with pneumatic jacking columns due to the compressibility of the gaseous operating fluid.
  • This spring effect has the consequence that the reaction time compared to a hydraulic drill support can be lower, which in turn can be associated with higher drilling performance, especially at low contact forces.
  • hydraulic jacking supports are often sluggish than pneumatic jacking supports, and therefore slower at low contact pressures.
  • the invention builds and provides, in addition to the hydraulic drive to arrange a spring device. Due to this additional spring means can be achieved with hydraulic drill columns reaction times, which can compete with the response times of pneumatic drill supports. As a result, particularly high drilling performance can be achieved with the invention, without the particularly robust and reliable hydraulic drive concept would have to be abandoned.
  • the spring device is arranged in series with the pressure chamber and / or acts. According to this embodiment, a change in length caused by expansion of the spring element and a change in length caused by expansion of the pressure chamber add up. In such a series connection, a particularly good reaction time reduction is achieved.
  • the spring device has at least one solid-state spring, in particular a metal spring.
  • the solid-state spring may be a metal spring.
  • the solid-state spring may be a spiral spring or a plate spring.
  • the spring device has at least one gas spring.
  • a gas in particular air, is used to provide the spring force.
  • a gas spring can be a special provide favorable force curve.
  • a gas spring can be particularly reliable, especially in long-term operation.
  • the gas spring has a spring gas volume which is outside the hydraulic cylinder and / or the pressure chamber of the hydraulic cylinder.
  • the gas spring may comprise a spring housing in which the spring gas volume is located, and which is in fluid communication with the pressure space via a line. Such an arrangement may be advantageous in terms of maintenance because gas spring and hydraulic cylinder can be maintained separately.
  • the gas spring has a spring gas volume, which is located in the pressure chamber of the hydraulic cylinder. As a result, a particularly compact arrangement can be obtained.
  • the invention also relates to a drilling apparatus having a drill support according to the invention and a pressure source for pressurizing the pressure chamber of the hydraulic cylinder.
  • the pressure fluid may preferably be water, but in principle also hydraulic oil.
  • the hydraulic cylinder is suitably a double-acting cylinder, so that it can be hydraulically both extended and retracted.
  • the drilling device comprises a hammer drill, which is arranged on the holder of the drill support.
  • the hammer drill for example, have an electropneumatic drive.
  • the spring device is preferably arranged on the drill support, whereby a particularly simple and compact arrangement is obtained.
  • At least one valve is provided, with which a flow of pressure fluid between the pressure source and the pressure chamber can be influenced.
  • the extension of the drill support can be controlled in a particularly simple manner.
  • the spring device has at least one gas spring, wherein the valve is arranged in line between the gas spring and the pressure source.
  • the gas spring can also act when the valve is closed due to control or greatly reduced in its cross section.
  • the valve is arranged in line between the gas spring and / or the pressure chamber.
  • FIG. 1 A first embodiment of a drilling device according to the invention is shown in FIG FIG. 1 shown.
  • the drilling apparatus has a hammer drill 3, which is shown only schematically, and a drill support 1, to which the drill chamber is fastened, and which can support the hammer drill 3 and can support a propulsion of the hammer drill 3.
  • the drill support 1 has at its one end an example formed as an eye bracket 22 to which the hammer 3 is hinged. At its other end, the drill support on a foot 11 which rests on the floor 8.
  • the drill support 1 further comprises a hydraulic cylinder 20 which is arranged between the holder 22 and the foot 11, and with which the holder 22 relative to the foot 11 in the axial direction 6 is adjustable. Accordingly, when the hydraulic cylinder 20 is extended, the hammer 3 is pushed away from the ground 8.
  • the hydraulic cylinder 20 has a cylinder housing 29 and a piston 28 movable therein.
  • the holder 22 on the cylinder housing 29 and the foot 11 is arranged on the piston 28.
  • a reverse arrangement is possible in which the holder is arranged on the piston and the foot on the cylinder housing.
  • the piston can also be designed in several parts and / or telescopic.
  • the hydraulic cylinder 20 is double-acting and therefore has a first pressure chamber 25 which is acted upon for extending the hydraulic cylinder 20 with hydraulic fluid 40, and a second pressure chamber 35 which is acted upon for retraction of the hydraulic cylinder 20 with hydraulic fluid 40.
  • a pressure source 60 is connected to the targeted extension or retraction of the hydraulic cylinder hydraulic fluid 40, in particular water, in the pressure chamber 25 and 35 can be introduced.
  • a conduit 66 extending between the pressure source 60 and the pressure chamber 25 is a valve 65 for influencing the fluid exchange between the pressure source 60 and the pressure chamber 25 is provided.
  • This valve 65 may be formed, for example, as a directional control valve or as a combined directional and control valve.
  • pressure fluid 40 is shown only in the first pressure chamber 25 in the figures. In a double-acting hydraulic cylinder 20 but pressure fluid will be in the pressure chamber 35 usually also.
  • a spring device 50 which in the embodiment of FIG. 1 a gas spring 54 has.
  • the gas spring 54 outside the cylinder housing 20 and / or the pressure chamber 25 is provided. It has a spring housing 56, whose interior is connected via a line 57 to the pressure chamber 25 in line connection. Inside the spring housing 56 is a spring gas volume 55, in particular of air, which provides the desired spring action.
  • the gas spring 54 of the FIG. 1 is thus designed as a bladder storage.
  • the gas spring may also be formed by a spring gas volume is arranged in the interior of the pressure chamber 25, in which case the external spring housing 56 and the conduit 57 may be omitted.
  • FIG. 2 A further embodiment of a drilling device according to the invention is shown in FIG FIG. 2 shown.
  • This in FIG. 2 illustrated embodiment differs from the in FIG. 1 illustrated embodiment only by the configuration and arrangement of the spring device. For the remaining elements, therefore, the above description of the FIG. 1 to get expelled.
  • the spring device 50 has a solid-state spring 52, for example a spiral spring.
  • the spring device could also be arranged, for example, between the holder 22 and the pressure chamber 25.
  • both in the embodiment of FIG. 1 as well as in the embodiment of FIG. 2 act the spring means 50 and 50 'in series with the pressure chamber 25, that is, the spring means 50 and 50' can absorb changes in length between the holder 22 and foot 11, without supplied from the pressure source 60 pressure fluid into the pressure chamber 25 is discharged or discharged from the pressure chamber 25.
  • the spring means 50 and 50' can absorb changes in length between the holder 22 and foot 11, without supplied from the pressure source 60 pressure fluid into the pressure chamber 25 is discharged or discharged from the pressure chamber 25.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)

Abstract

The drilling support (1) has foot (11) for placing on floor (8), axial support (22) for drill (3) and telescopic hydraulic cylinder (20). The hydraulic cylinder is displaced with holder relative to foot in axial direction (6). A pressure chamber (25) is arranged in hydraulic cylinder, for driving hydraulic cylinder by applying pressure fluid (40) to it. A spring device (50) is provided for cushioning the support opposite to foot.

Description

Die Erfindung betrifft eine Bohrstütze für einen Bohrhammer gemäss dem Oberbegriff des Anspruchs 1. Eine solche Bohrstütze ist ausgebildet mit einem Fuss zum Aufsetzen auf den Boden, einer Halterung für den Bohrhammer, und einem teleskopierbaren Hydraulikzylinder, mit dem die Halterung relativ zum Fuss in Axialrichtung verschiebbar ist, wobei im telekopierbaren Hydraulikzylinder mindestens ein Druckraum angeordnet ist, der zum Ausfahren des teleskopierbaren Hydraulikzylinders mit Druckflüssigkeit beaufschlagbar ist.The invention relates to a drill support for a hammer drill according to the preamble of claim 1. Such a drill support is formed with a foot for placement on the ground, a holder for the hammer drill, and a telescopic hydraulic cylinder with which the holder relative to the foot in the axial direction displaceable is, wherein in the telescopic hydraulic cylinder at least one pressure chamber is arranged, which is acted upon for extending the telescopic hydraulic cylinder with hydraulic fluid.

Solche Bohrstützen, teilweise auch als Bohrsäulen bezeichnet, sind beispielsweise aus der AT 226174 bekannt. Sie werden unter anderem im Untertagebergbau bei der Herstellung von Sprenglöchern eingesetzt und dienen dazu, zumindest einen Teil des Anpressdrucks des Bohrhammers zu erzeugen und/oder den Bohrhammer abzustützen.Such drill supports, sometimes referred to as Bohrsäulen are, for example, from AT 226174 known. They are used inter alia in underground mining in the production of blasting holes and serve to generate at least a portion of the contact pressure of the hammer drill and / or support the hammer drill.

Es sind sowohl pneumatisch betriebene als auch hydraulisch, insbesondere wasserhydraulisch betriebene Bohrstützen bekannt, wobei die Wahl des Betriebsfluids für die Bohrstütze davon abhängen kann, mit welcher Energieform der Bohrhammer betrieben wird.Both pneumatically operated and hydraulic, in particular water-hydraulically operated, drill supports are known, wherein the choice of operating fluid for the drill support may depend on the type of energy with which the hammer drill is operated.

In Versuchen hat sich gezeigt, dass die Bohrleistung, die bei Verwendung von hydraulisch betriebenen Bohrstützen erzielt werden kann, unter Umständen geringer sein kann als die Bohrleistung, die bei Verwendung von vergleichbaren pneumatisch betriebenen Bohrstützen erzielt werden kann, und zwar insbesondere bei niedrigen Anpresskräften (wobei unter der Bohrleistung insbesondere der pro Zeiteinheit erzielbare Vortrieb verstanden werden kann).In tests, it has been found that the drilling performance that can be achieved using hydraulically operated drill supports may be less than the drilling performance that can be achieved using comparable pneumatically operated drill supports, particularly at low contact forces under the drilling performance, in particular, the achievable propulsion per unit time can be understood).

Aufgabe der Erfindung ist es, eine Bohrstütze anzugeben, mit der bei besonders einfachem Aufbau und besonders hoher Zuverlässigkeit eine besonders gute Bohrleistung erzielt werden kann.The object of the invention is to provide a drill support, with the particularly simple design and very high reliability, a particularly good drilling performance can be achieved.

Die Aufgabe wird erfindungsgemäss durch eine Bohrstütze mit den Merkmalen des Anspruchs 1 gelöst. Bevorzugte Ausführungsformen sind in den abhängigen Ansprüchen angegeben.The object is achieved according to the invention by a drill support with the features of claim 1. Preferred embodiments are given in the dependent claims.

Eine erfindungsgemässe Bohrstütze ist dadurch gekennzeichnet, dass sie zumindest eine Federeinrichtung zum axialen Abfedern der Halterung gegenüber dem Fuss aufweist.An inventive drill support is characterized in that it comprises at least one spring means for axially cushioning the holder relative to the foot.

Ein Grundgedanke der Erfindung kann darin gesehen werden, im Kraftverlauf zwischen der Halterung für den Bohrhammer und dem Fuss eine Federeinrichtung vorzusehen, die mit dem Hydraulikzylinder zusammenwirkt. Diese Federeinrichtung kann in Axialrichtung gerichtete Längenänderungen der Bohrstütze zwischen Halterung und Fuss elastisch aufnehmen. Die Erfindung hat erkannt, dass die erhöhte Bohrleistung, die bei pneumatischen Bohrstützen beobachtet wurde, auf einer Federwirkung beruhen kann, die sich bei pneumatischen Bohrstützen aufgrund der Kompressibilität des gasförmigen Betriebsfluids einstellt. Diese Federwirkung hat zur Folge, dass die Reaktionszeit verglichen mit einer hydraulischen Bohrstütze geringer sein kann, was wiederum mit höheren Bohrleistungen einhergehen kann, insbesondere bei niedrigen Anpresskräften. Demgegenüber sind hydraulische Bohrstützen aufgrund des Fehlens von Kompressibilität des Betriebsfluids häufig träger als pneumatische Bohrstützen, und daher bei niedrigen Anpresskräften langsamer. Auf dieser Erkenntnis baut die Erfindung auf und sieht vor, zusätzlich zum hydraulischen Antrieb eine Federeinrichtung anzuordnen. Aufgrund dieser zusätzlichen Federeinrichtung können mit hydraulischen Bohrstützen Reaktionszeiten erreicht werden, die mit den Reaktionszeiten pneumatischer Bohrstützen konkurrieren können. Infolgedessen können mit der Erfindung auch besonders hohe Bohrleistungen erzielt werden, ohne dass das besonders robuste und zuverlässige hydraulische Antriebskonzept aufgegeben werden müsste.A basic idea of the invention can be seen in the force curve between the holder for the hammer drill and the foot to provide a spring device which cooperates with the hydraulic cylinder. This spring device can absorb elastically in the axial direction directed changes in length of the drill support between the bracket and foot. The invention has recognized that the increased drilling performance observed with pneumatic jacking supports may be due to a spring action which occurs with pneumatic jacking columns due to the compressibility of the gaseous operating fluid. This spring effect has the consequence that the reaction time compared to a hydraulic drill support can be lower, which in turn can be associated with higher drilling performance, especially at low contact forces. In contrast, due to the lack of compressibility of the operating fluid, hydraulic jacking supports are often sluggish than pneumatic jacking supports, and therefore slower at low contact pressures. Based on this knowledge, the invention builds and provides, in addition to the hydraulic drive to arrange a spring device. Due to this additional spring means can be achieved with hydraulic drill columns reaction times, which can compete with the response times of pneumatic drill supports. As a result, particularly high drilling performance can be achieved with the invention, without the particularly robust and reliable hydraulic drive concept would have to be abandoned.

Besonders bevorzugt ist es, dass die Federeinrichtung in Reihe mit dem Druckraum angeordnet ist und/oder wirkt. Gemäss dieser Ausführungsform addieren sich eine durch Expansion des Federelements bewirkte Längenänderung und eine durch Expansion des Druckraums bewirkte Längenänderung. Bei einer solchen Reihenschaltung wird eine besonders gute Reaktionszeitverkürzung erzielt.It is particularly preferred that the spring device is arranged in series with the pressure chamber and / or acts. According to this embodiment, a change in length caused by expansion of the spring element and a change in length caused by expansion of the pressure chamber add up. In such a series connection, a particularly good reaction time reduction is achieved.

Beispielsweise kann vorgesehen sein, dass die Federeinrichtung zumindest eine Festkörperfeder, insbesondere eine Metallfeder aufweist. Dies kann im Hinblick auf den konstruktiven Aufwand vorteilhaft sein. Zum Beispiel kann die Festkörperfeder eine Metallfeder sein. Insbesondere kann die Festkörperfeder eine Spiralfeder oder eine Tellerfeder sein.For example, it can be provided that the spring device has at least one solid-state spring, in particular a metal spring. This can be advantageous in terms of design complexity. For example, the solid-state spring may be a metal spring. In particular, the solid-state spring may be a spiral spring or a plate spring.

Alternativ oder zusätzlich kann vorgesehen sein, dass die Federeinrichtung zumindest eine Gasdruckfeder aufweist. Bei einer solchen Gasdruckfeder wird ein Gas, insbesondere Luft, zur Bereitstellung der Federkraft genutzt. Eine solche Gasdruckfeder kann einen besonders günstigen Kraftverlauf zur Verfügung stellen. Darüber hinaus kann eine Gasdruckfeder besonders zuverlässig sein, insbesondere im Langzeitbetrieb.Alternatively or additionally, it can be provided that the spring device has at least one gas spring. In such a gas spring, a gas, in particular air, is used to provide the spring force. Such a gas spring can be a special provide favorable force curve. In addition, a gas spring can be particularly reliable, especially in long-term operation.

Soweit eine Gasdruckfeder vorgesehen ist, ist es besonders zweckmässig, dass die Gasdruckfeder ein Federgasvolumen aufweist, das sich ausserhalb des Hydraulikzylinders und/oder des Druckraums des Hydraulikzylinders befindet. Demgemäss kann die Gasdruckfeder ein Federgehäuse aufweisen, in dem sich das Federgasvolumen befindet, und das über eine Leitung mit dem Druckraum in Fluidverbindung steht. Eine solche Anordnung kann im Hinblick auf den Wartungsaufwand vorteilhaft sein, da Gasdruckfeder und Hydraulikzylinder separat gewartet werden können.As far as a gas spring is provided, it is particularly expedient that the gas spring has a spring gas volume which is outside the hydraulic cylinder and / or the pressure chamber of the hydraulic cylinder. Accordingly, the gas spring may comprise a spring housing in which the spring gas volume is located, and which is in fluid communication with the pressure space via a line. Such an arrangement may be advantageous in terms of maintenance because gas spring and hydraulic cylinder can be maintained separately.

Alternativ oder zusätzlich kann vorgesehen sein, dass die Gasdruckfeder ein Federgasvolumen aufweist, das sich im Druckraum des Hydraulikzylinders befindet. Hierdurch kann eine besonders kompakte Anordnung erhalten werden.Alternatively or additionally, it may be provided that the gas spring has a spring gas volume, which is located in the pressure chamber of the hydraulic cylinder. As a result, a particularly compact arrangement can be obtained.

Die Erfindung betrifft auch eine Bohrvorrichtung mit einer erfindungsgemässen Bohrstütze und einer Druckquelle zum Beaufschlagen des Druckraums des Hydraulikzylinders mit Druckflüssigkeit. Die Druckflüssigkeit kann vorzugsweise Wasser, grundsätzlich aber auch Hydrauliköl sein. Der Hydraulikzylinder ist geeigneterweise ein doppeltwirkender Zylinder, so dass dieser hydraulisch sowohl aus- als auch eingefahren werden kann.The invention also relates to a drilling apparatus having a drill support according to the invention and a pressure source for pressurizing the pressure chamber of the hydraulic cylinder. The pressure fluid may preferably be water, but in principle also hydraulic oil. The hydraulic cylinder is suitably a double-acting cylinder, so that it can be hydraulically both extended and retracted.

Zweckmässigerweise weist die Bohrvorrichtung einen Bohrhammer auf, der an der Halterung der Bohrstütze angeordnet ist. Der Bohrhammer kann beispielsweise einen elektropneumatischen Antrieb aufweisen.Conveniently, the drilling device comprises a hammer drill, which is arranged on the holder of the drill support. The hammer drill, for example, have an electropneumatic drive.

Die Federeinrichtung ist vorzugsweise an der Bohrstütze angeordnet, wodurch eine besonders einfache und kompakte Anordnung erhalten wird.The spring device is preferably arranged on the drill support, whereby a particularly simple and compact arrangement is obtained.

Weiterhin ist es zweckmässig, dass zumindest ein Ventil vorgesehen ist, mit dem eine Strömung von Druckflüssigkeit zwischen der Druckquelle und dem Druckraum beeinflussbar ist. Mittels eines solchen Ventils kann das Ausfahren der Bohrstütze in besonders einfacher Weise gesteuert werden. Dabei ist es bevorzugt, dass die Federeinrichtung zumindest eine Gasdruckfeder aufweist, wobei das Ventil leitungsmässig zwischen der Gasdruckfeder und der Druckquelle angeordnet ist. Bei einer solchen Anordnung kann die Gasdruckfeder auch dann wirken, wenn das Ventil steuerungsbedingt geschlossen oder in seinem Querschnitt stark reduziert ist. Auch ist es zweckmässig, dass das Ventil leitungsmässig zwischen der Gasdruckfeder und/oder dem Druckraum angeordnet ist.Furthermore, it is expedient that at least one valve is provided, with which a flow of pressure fluid between the pressure source and the pressure chamber can be influenced. By means of such a valve, the extension of the drill support can be controlled in a particularly simple manner. It is preferred that the spring device has at least one gas spring, wherein the valve is arranged in line between the gas spring and the pressure source. In such an arrangement, the gas spring can also act when the valve is closed due to control or greatly reduced in its cross section. It is also expedient that the valve is arranged in line between the gas spring and / or the pressure chamber.

Die Erfindung wird nachfolgend anhand bevorzugter Ausführungsbeispiele näher erläutert, die schematisch in den beiliegenden Figuren dargestellt sind. In den Figuren zeigen schematisch:

Figur 1:
Eine teilweise geschnittene Ansicht einer ersten Ausführungsform einer erfindungsgemässen Bohrvorrichtung mit einer erfindungsgemässen Bohrstütze; und
Figur 2:
eine teilweise geschnittene Ansicht einer zweiten Ausführungsform einer erfindungsgemässen Bohrvorrichtung mit einer erfindungsgemässen Bohrstütze.
The invention will be explained in more detail below with reference to preferred embodiments, which are shown schematically in the accompanying figures. In the figures show schematically:
FIG. 1:
A partially sectioned view of a first embodiment of a drilling device according to the invention with a drill support according to the invention; and
FIG. 2:
a partially sectioned view of a second embodiment of a drilling device according to the invention with a drill support according to the invention.

Ein erstes Ausführungsbeispiel einer erfindungsgemässen Bohrvorrichtung ist in Figur 1 dargestellt. Die Bohrvorrichtung weist einen lediglich schematisch dargestellten Bohrhammer 3 sowie eine Bohrstütze 1 auf, an welcher der Bohrammer befestigt ist, und welche den Bohrhammer 3 abstützen kann und einen Vortrieb des Bohrhammers 3 unterstützen kann.A first embodiment of a drilling device according to the invention is shown in FIG FIG. 1 shown. The drilling apparatus has a hammer drill 3, which is shown only schematically, and a drill support 1, to which the drill chamber is fastened, and which can support the hammer drill 3 and can support a propulsion of the hammer drill 3.

Die Bohrstütze 1 weist an ihrem einen Ende eine beispielhaft als Auge ausgebildete Halterung 22 auf, an welcher der Bohrhammer 3 gelenkig befestigt ist. An ihrem anderen Ende weist die Bohrstütze einen Fuss 11 auf, der auf dem Boden 8 aufsteht. Die Bohrstütze 1 weist ferner einen Hydraulikzylinder 20 auf, der zwischen der Halterung 22 und dem Fuss 11 angeordnet ist, und mit dem die Halterung 22 relativ zum Fuss 11 in Axialrichtung 6 verstellbar ist. Demgemäss wird beim Ausfahren des Hydraulikzylinders 20 der Bohrhammer 3 vom Boden 8 hinweggeschoben.The drill support 1 has at its one end an example formed as an eye bracket 22 to which the hammer 3 is hinged. At its other end, the drill support on a foot 11 which rests on the floor 8. The drill support 1 further comprises a hydraulic cylinder 20 which is arranged between the holder 22 and the foot 11, and with which the holder 22 relative to the foot 11 in the axial direction 6 is adjustable. Accordingly, when the hydraulic cylinder 20 is extended, the hammer 3 is pushed away from the ground 8.

Der Hydraulikzylinder 20 weist ein Zylindergehäuse 29 und einen hierin beweglichen Kolben 28 auf. Im dargestellten Ausführungsbeispiel ist die Halterung 22 am Zylindergehäuse 29 und der Fuss 11 am Kolben 28 angeordnet. Grundsätzlich ist aber auch eine umgekehrte Anordnung möglich, bei welcher die Halterung am Kolben und der Fuss am Zylindergehäuse angeordnet sind. Der Kolben kann auch mehrteilig und/oder teleskopierbar ausgebildet sein.The hydraulic cylinder 20 has a cylinder housing 29 and a piston 28 movable therein. In the illustrated embodiment, the holder 22 on the cylinder housing 29 and the foot 11 is arranged on the piston 28. In principle, however, a reverse arrangement is possible in which the holder is arranged on the piston and the foot on the cylinder housing. The piston can also be designed in several parts and / or telescopic.

Der Hydraulikzylinder 20 ist doppeltwirkend ausgeführt und weist daher einen ersten Druckraum 25 auf, der zum Ausfahren des Hydraulikzylinders 20 mit Druckflüssigkeit 40 beaufschlagbar ist, sowie einen zweiten Druckraum 35, der zum Einfahren des Hydraulikzylinders 20 mit Druckflüssigkeit 40 beaufschlagbar ist. An den Hydraulikzylinder 20 ist eine Druckquelle 60 angeschlossen, mit der zum gezielten Aus- oder Einfahren des Hydraulikzylinders Druckflüssigkeit 40, insbesondere Wasser, in den Druckraum 25 bzw. 35 einleitbar ist. In einer Leitung 66, die zwischen der Druckquelle 60 und dem Druckraum 25 verläuft, ist ein Ventil 65 zum Beeinflussen des Flüssigkeitsaustauschs zwischen Druckquelle 60 und Druckraum 25 vorgesehen. Dieses Ventil 65 kann beispielsweise als Wegeventil oder als kombiniertes Wege- und Steuerventil ausgebildet sein.The hydraulic cylinder 20 is double-acting and therefore has a first pressure chamber 25 which is acted upon for extending the hydraulic cylinder 20 with hydraulic fluid 40, and a second pressure chamber 35 which is acted upon for retraction of the hydraulic cylinder 20 with hydraulic fluid 40. To the hydraulic cylinder 20, a pressure source 60 is connected to the targeted extension or retraction of the hydraulic cylinder hydraulic fluid 40, in particular water, in the pressure chamber 25 and 35 can be introduced. In a conduit 66 extending between the pressure source 60 and the pressure chamber 25 is a valve 65 for influencing the fluid exchange between the pressure source 60 and the pressure chamber 25 is provided. This valve 65 may be formed, for example, as a directional control valve or as a combined directional and control valve.

Der Übersichtlichkeit halber ist in den Figuren Druckflüssigkeit 40 nur im ersten Druckraum 25 dargestellt. Bei einem doppeltwirkenden Hydraulikzylinder 20 wird sich aber in der Regel auch im Druckraum 35 Druckflüssigkeit befinden.For the sake of clarity, pressure fluid 40 is shown only in the first pressure chamber 25 in the figures. In a double-acting hydraulic cylinder 20 but pressure fluid will be in the pressure chamber 35 usually also.

Zum Reduzieren der Reaktionszeit der Bohrstütze 1 und damit zur Bohrleistungsverbesserung ist eine Federeinrichtung 50 vorgesehen, die beim Ausführungsbeispiel der Figur 1 eine Gasdruckfeder 54 aufweist. Beim Ausführungsbeispiel der Figur 1 ist die Gasdruckfeder 54 ausserhalb des Zylindergehäuses 20 und/oder des Druckraums 25 vorgesehen. Sie weist ein Federgehäuse 56 auf, dessen Innenraum über eine Leitung 57 mit dem Druckraum 25 in Leitungsverbindung steht. Im Inneren des Federgehäuses 56 befindet sich ein Federgasvolumen 55, insbesondere aus Luft, das die gewünschte Federwirkung bereitstellt. Die Gasdruckfeder 54 der Figur 1 ist somit wie ein Blasenspeicher ausgebildet.To reduce the reaction time of the drill support 1 and thus to Bohrleistungsverbesserung a spring device 50 is provided, which in the embodiment of FIG. 1 a gas spring 54 has. In the embodiment of FIG. 1 is the gas spring 54 outside the cylinder housing 20 and / or the pressure chamber 25 is provided. It has a spring housing 56, whose interior is connected via a line 57 to the pressure chamber 25 in line connection. Inside the spring housing 56 is a spring gas volume 55, in particular of air, which provides the desired spring action. The gas spring 54 of the FIG. 1 is thus designed as a bladder storage.

In einer anderen, nicht dargestellten Ausführungsvariante kann die Gasdruckfeder auch dadurch gebildet sein, dass ein Federgasvolumen im Inneren des Druckraums 25 angeordnet ist, wobei dann das externe Federgehäuse 56 sowie die Leitung 57 entfallen können.In another embodiment, not shown, the gas spring may also be formed by a spring gas volume is arranged in the interior of the pressure chamber 25, in which case the external spring housing 56 and the conduit 57 may be omitted.

Ein weiteres Ausführungsbeispiel einer erfindungsgemässen Bohrvorrichtung ist in Figur 2 dargestellt. Das in Figur 2 dargestellte Ausführungsbeispiel unterscheidet sich von dem in Figur 1 dargestellten Ausführungsbeispiel lediglich durch die Ausgestaltung und Anordnung der Federeinrichtung. Für die verbleibenden Elemente kann daher auf die obenstehende Beschreibung der Figur 1 verwiesen werden.A further embodiment of a drilling device according to the invention is shown in FIG FIG. 2 shown. This in FIG. 2 illustrated embodiment differs from the in FIG. 1 illustrated embodiment only by the configuration and arrangement of the spring device. For the remaining elements, therefore, the above description of the FIG. 1 to get expelled.

Beim Ausführungsbeispiel der Figur 2 weist die Federeinrichtung 50' eine Festkörperfeder 52, z.B. eine Spiralfeder auf. Im dargestellten Ausführungsbeispiel ist die Federeinrichtung 50' im Verlauf des Kolbens 28, also zwischen Druckraum 25 und Fuss 11 angeordnet. Die Federeinrichtung könnte aber beispielsweise auch zwischen Halterung 22 und Druckraum 25 angeordnet werden.In the embodiment of FIG. 2 For example, the spring device 50 'has a solid-state spring 52, for example a spiral spring. In the illustrated embodiment, the spring means 50 'in the course of the piston 28, that is arranged between the pressure chamber 25 and 11 foot. However, the spring device could also be arranged, for example, between the holder 22 and the pressure chamber 25.

Sowohl beim Ausführungsbeispiel der Figur 1 als auch beim Ausführungsbeispiel der Figur 2 wirken die Federeinrichtung 50 bzw. 50' in Reihe mit dem Druckraum 25, d.h. die Federeinrichtungen 50 bzw. 50' können Längenänderungen zwischen Halterung 22 und Fuss 11 aufnehmen, ohne dass von der Druckquelle 60 Druckflüssigkeit in den Druckraum 25 zugeführt wird oder aus dem Druckraum 25 abgeführt wird. Treten somit beim Betrieb der Bohrvorrichtung in Axialrichtung 6 gerichtete Stösse vom Bohrhammer 3 und/oder der Halterung 22 zum Fuss 11 hin auf, so können diese von der jeweiligen Federeinrichtung 50 bzw. 50' aufgenommen werden.Both in the embodiment of FIG. 1 as well as in the embodiment of FIG. 2 act the spring means 50 and 50 'in series with the pressure chamber 25, that is, the spring means 50 and 50' can absorb changes in length between the holder 22 and foot 11, without supplied from the pressure source 60 pressure fluid into the pressure chamber 25 is discharged or discharged from the pressure chamber 25. Thus, when the drilling device is operated in the axial direction 6, shocks from the rotary hammer 3 and / or the bracket 22 towards the foot 11 occur, so they can be absorbed by the respective spring device 50 or 50 '.

Claims (9)

Bohrstütze (1) für einen Bohrhammer (3), mit
einem Fuss (11) zum Aufsetzen auf den Boden (8),
einer Halterung (22) für den Bohrhammer (3), und
einem teleskopierbaren Hydraulikzylinder (20), mit dem die Halterung (22) relativ zum Fuss (11) in Axialrichtung (6) verschiebbar ist, wobei im telekopierbaren Hydraulikzylinder (20) mindestens ein Druckraum (25) angeordnet ist, der zum Ausfahren des teleskopierbaren Hydraulikzylinders (20) mit Druckflüssigkeit (40) beaufschlagbar ist, dadurch gekennzeichnet,
dass die Bohrstütze (1) zumindest eine Federeinrichtung (50) zum axialen Abfedern der Halterung (22) gegenüber dem Fuss (11) aufweist.Drill support (1) for a hammer drill (3), with
a foot (11) for placing on the ground (8),
a holder (22) for the hammer drill (3), and
a telescopic hydraulic cylinder (20), with which the holder (22) relative to the foot (11) in the axial direction (6) is displaceable, wherein in the telescopic hydraulic cylinder (20) at least one pressure chamber (25) is arranged, for extending the telescopic hydraulic cylinder (20) can be acted upon with hydraulic fluid (40), characterized
that the air leg (1) has at least one spring means (50) for cushioning the axial support (22) relative to the foot (11). Bohrstütze (1) nach Anspruch 1,
dadurch gekennzeichnet,
dass die Federeinrichtung (50) in Reihe mit dem Druckraum (25) angeordnet ist.Drill support (1) according to claim 1,
characterized,
in that the spring device (50) is arranged in series with the pressure chamber (25). Bohrstütze (1) nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
dass die Federeinrichtung (50) zumindest eine Festkörperfeder (52) aufweist.Drill support (1) according to one of the preceding claims,
characterized,
that the spring device (50) comprises at least one solid body spring (52). Bohrstütze (1) nach einem der vorstehenden Ansprüche,
dadurch gekennzeichnet,
dass die Federeinrichtung (50) zumindest eine Gasdruckfeder (54) aufweist.Drill support (1) according to one of the preceding claims,
characterized,
in that the spring device (50) has at least one gas pressure spring (54). Bohrstütze (1) nach Anspruch 4,
dadurch gekennzeichnet,
dass die Gasdruckfeder (54) ein Federgasvolumen (55) aufweist, das sich ausserhalb des Hydraulikzylinders (20) befindet.Drill support (1) according to claim 4,
characterized,
that the gas pressure spring (54) has a spring volume of gas (55), which is located outside of the hydraulic cylinder (20). Bohrstütze (1) nach Anspruch 4 oder 5,
dadurch gekennzeichnet,
dass die Gasdruckfeder (54) ein Federgasvolumen aufweist, das sich im Druckraum (25) des Hydraulikzylinders (20) befindet.Drill support (1) according to claim 4 or 5,
characterized,
that the gas pressure spring (54) has a spring volume of gas which is located in the pressure chamber (25) of the hydraulic cylinder (20). Bohrvorrichtung mit
einer Bohrstütze (1) nach einem der vorstehenden Ansprüche,
einer Druckquelle (60) zum Beaufschlagen des Druckraums (25) des Hydraulikzylinders (20) mit Druckflüssigkeit (40), insbesondere mit Wasser, und
einem Bohrhammer (3), der an der Halterung (22) der Bohrstütze (1) angeordnet ist.Drilling device with
a drill support (1) according to one of the preceding claims,
a pressure source (60) for pressurizing the pressure chamber (25) of the hydraulic cylinder (20) with pressurized fluid (40), in particular with water, and
a hammer drill (3) which is arranged on the holder (22) of the drill support (1). Bohrvorrichtung nach Anspruch 7,
dadurch gekennzeichnet,
dass die Federeinrichtung (50) an der Bohrstütze angeordnet ist.Drilling device according to claim 7,
characterized,
in that the spring device (50) is arranged on the drill support. Bohrvorrichtung nach Anspruch 7 oder Anspruch 8,
dadurch gekennzeichnet,
dass zumindest ein Ventil (65) vorgesehen ist, mit dem eine Strömung von Druckflüssigkeit (40) zwischen der Druckquelle (60) und dem Druckraum (25) beeinflussbar ist, und
dass die Federeinrichtung (50) zumindest eine Gasdruckfeder (54) aufweist, wobei das Ventil (65) leitungsmässig zwischen der Gasdruckfeder (54) und der Druckquelle (60) angeordnet ist.Drilling device according to claim 7 or claim 8,
characterized,
that at least one valve (65) is provided, with which a flow of pressurized fluid (40) between the pressure source (60) and the pressure chamber (25) can be influenced, and
in that the spring device (50) has at least one gas pressure spring (54), wherein the valve (65) is arranged in line between the gas pressure spring (54) and the pressure source (60).
EP12150866.7A 2011-02-16 2012-01-12 Drill support for a hammer drill Revoked EP2489476B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL12150866T PL2489476T3 (en) 2011-02-16 2012-01-12 Drill support for a hammer drill

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102011004211A DE102011004211A1 (en) 2011-02-16 2011-02-16 Drill support for a hammer drill

Publications (2)

Publication Number Publication Date
EP2489476A1 true EP2489476A1 (en) 2012-08-22
EP2489476B1 EP2489476B1 (en) 2015-07-01

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EP (1) EP2489476B1 (en)
CA (1) CA2765037A1 (en)
DE (1) DE102011004211A1 (en)
PL (1) PL2489476T3 (en)
ZA (1) ZA201201126B (en)

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Publication number Priority date Publication date Assignee Title
CN107378530A (en) * 2017-08-08 2017-11-24 格林精密部件(苏州)有限公司 A kind of novel elastic support

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US2754804A (en) 1954-01-15 1956-07-17 Goodman Mfg Co Automatic feed pressure control for telescopic stoper leg
GB764402A (en) 1955-01-06 1956-12-28 Bosch Gmbh Robert Improvements in or relating to supports for hand-guided percussive tools
ATA226174A (en) 1973-04-19 1976-10-15 Aerosol Automat Veb PROCESS FOR MANUFACTURING A POLISHING BODY ON THE BASIS OF ALUMINUM OXIDE
FR2446155A1 (en) * 1979-01-09 1980-08-08 Villedary Jacques Manually propelled trolley for pneumatic road drill - has vertical tubular frame with three wheels which can be vertically adjusted independently
EP0391613A2 (en) * 1989-04-01 1990-10-10 John Macdonald & Company (Pneumatic Tools) Limited Paving breakers and supports therefor
WO2004071929A1 (en) * 2003-02-14 2004-08-26 Hultdin System Ab Damping device
FR2894303A1 (en) * 2005-12-02 2007-06-08 Pommier S C E B P Sa Shock-absorbing hydraulic cylinder is divided into narrow chamber and wide chamber by peripheral shoulder, piston of smaller diameter than narrow chamber being mounted in slide which fits closely in wider chamber
US20070215368A1 (en) * 2006-03-15 2007-09-20 Sorric Ronald J Jackhammer lift assist

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US2500932A (en) * 1944-12-01 1950-03-21 Joy Mfg Co Drilling apparatus
US3117634A (en) 1958-02-26 1964-01-14 Nils Torsten Neldas Ground borers
US2917953A (en) 1959-02-24 1959-12-22 Edward A Badali Pneumatic tool support
AT226174B (en) 1960-11-25 1963-03-11 Ingenieurbuero Dipl- Flottmann Changeover valve for hydraulic equipment, in particular underground operating props for rotary hammers
AU617316B2 (en) 1987-05-12 1991-11-28 Hydra-Push Pty. Ltd. Pusher leg for rock drill apparatus
CA2680730C (en) * 2006-03-15 2014-05-27 Integrated Tool Solutions, Llc Jackhammer with a lift assist

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1045365A (en) * 1951-11-22 1953-11-25 Applevage Damper for fluid actuated pistons
US2754804A (en) 1954-01-15 1956-07-17 Goodman Mfg Co Automatic feed pressure control for telescopic stoper leg
GB764402A (en) 1955-01-06 1956-12-28 Bosch Gmbh Robert Improvements in or relating to supports for hand-guided percussive tools
ATA226174A (en) 1973-04-19 1976-10-15 Aerosol Automat Veb PROCESS FOR MANUFACTURING A POLISHING BODY ON THE BASIS OF ALUMINUM OXIDE
FR2446155A1 (en) * 1979-01-09 1980-08-08 Villedary Jacques Manually propelled trolley for pneumatic road drill - has vertical tubular frame with three wheels which can be vertically adjusted independently
EP0391613A2 (en) * 1989-04-01 1990-10-10 John Macdonald & Company (Pneumatic Tools) Limited Paving breakers and supports therefor
WO2004071929A1 (en) * 2003-02-14 2004-08-26 Hultdin System Ab Damping device
FR2894303A1 (en) * 2005-12-02 2007-06-08 Pommier S C E B P Sa Shock-absorbing hydraulic cylinder is divided into narrow chamber and wide chamber by peripheral shoulder, piston of smaller diameter than narrow chamber being mounted in slide which fits closely in wider chamber
US20070215368A1 (en) * 2006-03-15 2007-09-20 Sorric Ronald J Jackhammer lift assist

Also Published As

Publication number Publication date
ZA201201126B (en) 2012-11-28
CA2765037A1 (en) 2012-08-16
EP2489476B1 (en) 2015-07-01
PL2489476T3 (en) 2015-12-31
DE102011004211A1 (en) 2012-08-16

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