EP1592862B1 - Gesteinsbohrmaschine und spülgehäuse - Google Patents

Gesteinsbohrmaschine und spülgehäuse Download PDF

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Publication number
EP1592862B1
EP1592862B1 EP04703808A EP04703808A EP1592862B1 EP 1592862 B1 EP1592862 B1 EP 1592862B1 EP 04703808 A EP04703808 A EP 04703808A EP 04703808 A EP04703808 A EP 04703808A EP 1592862 B1 EP1592862 B1 EP 1592862B1
Authority
EP
European Patent Office
Prior art keywords
flushing
bearing
housing
shank
rock drill
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
Application number
EP04703808A
Other languages
English (en)
French (fr)
Other versions
EP1592862A1 (de
Inventor
Ari Kotala
Aimo Helin
Jean-Claude Barthomeuf
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandvik Mining and Construction Oy
Original Assignee
Sandvik Mining and Construction Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sandvik Mining and Construction Oy filed Critical Sandvik Mining and Construction Oy
Publication of EP1592862A1 publication Critical patent/EP1592862A1/de
Application granted granted Critical
Publication of EP1592862B1 publication Critical patent/EP1592862B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B6/00—Drives for drilling with combined rotary and percussive action
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • 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
    • B25D17/26—Lubricating

Definitions

  • the invention relates to a rock drill machine comprising at least: a body; a percussion element for generating percussion pulses required in rock breaking; a shank arranged in front of the percussion element in the percussion direction and supported to the body with at least one bearing and whose rear end is provided with a percussion surface for receiving percussion pulses; a flushing housing that forms a space around the shank; at least one first flushing duct along which flushing medium is arranged to be led into the flushing housing; and at least one second flushing duct provided in the shank and along which flushing medium is arranged to flow out of the flushing housing.
  • the invention further relates to a flushing housing through which a shank of a rock drill machine is axially adaptable, the flushing housing comprising: at least one bearing for supporting the shank; and at least one first duct for leading flushing medium into the flushing housing.
  • a drawback in percussive rock drill machines can be insufficient lubrication and cooling of the bearings in the shank.
  • the problem may result in inadequate service life of the bearings in the shank.
  • the excessive axial length of the rock drill machine may cause problems.
  • US-4 576 240 discloses a rock drill machine wherein these drawbacks are present.
  • the object of the present invention is to provide a new and improved flushing housing and a rock drill machine provided with such a flushing housing.
  • the rock drill of the invention is characterized in that the flushing medium is arranged to flow through at least one bearing that supports the shank, whereby the flushing medium is arranged to lubricate and cool the bearing.
  • the flushing housing of the invention is characterized in that the first duct is arranged at the bearing when viewed axially, whereby the flushing medium is arranged to lubricate and cool the bearing.
  • An essential idea of the invention is that flushing medium is fed through at least one bearing of the shank.
  • An advantage herein is that the flushing medium is able to efficiently lubricate the bearing.
  • the flushing medium flowing through the bearing is able to discharge any impurities out of the bearing.
  • a still further advantage is that the flushing medium is able to cool the bearing very efficiently. This may lengthen the service life of the bearing of the shank and reduce malfunction.
  • the invention enables a shorter construction of the flushing housing.
  • the flushing duct from which the flushing medium is fed into the flushing housing is arranged at the bearing that supports the shank. This way the flushing medium is arranged to flow through the bearing substantially radially. Since the bearing and the feed of flushing medium are arranged to overlap, the flushing housing may be particularly short when viewed axially.
  • the flushing housing constitutes the foremost part of the body of the rock drill machine. Accordingly, the rock drill machine does not comprise a separate front cover. This being so, only one sealing surface is provided between the flushing housing and the body, facilitating the manufacture of the flushing housing. The assembly is also easier and the structure is more durable since there are fewer seals. Furthermore, the body of the drill machine may be axially shorter there being no separate front cover.
  • Figure 1 shows a rock drill machine 1 comprising a body 2, a percussion device 3 and a shank 4.
  • the rock drill machine 1 may comprise a rotation device 5 for rotating the shank 4 and a tool 6 connected thereto around its axis.
  • the rock drill machine 1 may be arranged on a feed beam 7 relative to which it can be moved with feed means 8 during drilling. Furthermore, flushing medium is led to the rock drill machine 1 along a feed duct 9, the medium being led further to a drill hole by means of the shank 4 and the tool 6.
  • Figure 2 shows that the percussion device 3 comprises a percussion element 10 for generating percussion pulses to a percussion surface 11 of the shank 4 located in front of it.
  • the percussion element 10 may be an axially back and forth movable percussion piston that is movable for instance by means of pressure medium or electricity.
  • the percussion element 10 may generate percussion pulses required in rock breaking in some other manner, for instance based on the magnetostrictive effect.
  • the shank 4 transfers the percussion pulses to the tool 6 and further to a rock 12.
  • the shank 4 may comprise joints, such as threads, for example, for fastening the tools 6.
  • the shank 4 and the tool 6 may constitute an integrated entity.
  • the tool 6 may comprise several detachable pieces, for instance a plurality of extension rods and a drill bit.
  • the front end of the body 2 of the drill machine 1 comprises a flushing housing 13, which is a space provided around the shank 4.
  • the flushing housing 13 is in communication via a first flushing duct 14 with the feed duct 9 for leading flushing medium to the flushing housing 13.
  • a front cover 21 may be provided with a first seal 15 or, alternatively, the front end of the flushing housing 13 may be provided with a first seal 15 and farther back at a distance a second seal 16 may be provided, the flushing housing 13 being sealed with said seals 15, 16 to the shank 4.
  • the back seal 16 may be arranged in a piece separate from the flushing housing 13 or elsewhere in the body 2.
  • the shank 4 may comprise a second flushing duct 17, which is in communication with the flushing housing 13, allowing the flushing medium fed into the flushing housing 13 to flow into the second flushing duct 17 and further along a third flushing duct 18 in the tool 6 into the drill hole.
  • the shank 4 may be mounted in bearings from the front part with a front bearing 19 and from the rear part with a rear bearing 20. In some cases, only one bearing may suffice. On the other hand, there may be more than two bearings.
  • the front bearing 19 may be arranged in a section between the first flushing duct 14 and the second flushing duct 17.
  • the flushing medium is arranged to flow through the front bearing 19 substantially axially. Accordingly, the flushing medium is able to lubricate and cool the bearing 19.
  • the foremost section of the body 2 is formed by the front cover 21, which may be fastened to the flushing housing 13.
  • the front cover 21 may be an integrated part of the flushing housing 13, in which case there are fewer mating surfaces.
  • the body 2 can be made axially shorter.
  • FIG. 3 shows a section of an alternative structure of the flushing housing 13.
  • the flushing housing 13 can constitute the foremost part of the body 2.
  • the front part of the body 2 of the drill machine 1 has no front cover. This being so, only one mating surface is sufficient between the flushing housing 13 and the other parts of the body 2, facilitating the manufacture of the flushing housing.
  • Such a flushing housing is also fast and simple to open when required and to replace with a new one for instance when the bearings are damaged.
  • the front cover, but also the seals 15, 16, the front bearing 19 and the flushing duct 14 may be integrated into the flushing housing 13.
  • the back seal 16 may be adapted in another body piece than the flushing housing 13.
  • the first flushing duct 14 may be arranged at the front bearing 19, allowing the flushing medium from the flushing duct 14 to flow radially through the bearing 19.
  • the advantage of this structure is that the body 2 can be made shorter since no front cover exists and, further, since the flushing duct 14 and the bearing 19 are arranged to overlap and not to be in succession.
  • the rear end of the shank 4 is cup-shaped, the percussion element 10 being partly nested within the shank 4. This is another fact that enables the construction of a short rock drill machine 1.
  • the flushing medium may be gas or fluid.
  • the flushing medium is water or a mixture of water and one or more additives.
  • the bearings 15, 16 of the shank 4 may be roller bearings, slide bearings or other bearings suitable for the purpose.
  • the shank 4 may be supported with slide bearings 15 and 16.
  • the front bearing 15 is provided with one or more substantially radial ducts in a manner allowing the flushing medium to flow radially through the bearing 15.
  • the flushing medium may flow substantially axially through clearances in the bearing 15 and/or through one or more ducts passing through the bearing 15.
  • the flushing medium may be arranged to flow through the rear bearing 20.
  • both bearings 19, 20 may be located in the flushing housing 13, and the feed of flushing medium may even be arranged to enable the flow of flushing medium through both bearings 19, 20.
  • a separate flushing housing 13 may also be arranged in front of the actual body 2 of the rock drill machine 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Filters For Electric Vacuum Cleaners (AREA)
  • Apparatuses For Bulk Treatment Of Fruits And Vegetables And Apparatuses For Preparing Feeds (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Claims (8)

  1. Gesteinsbohrmaschine, umfassend mindestens:
    einen Körper (2);
    ein Schlagelement (10) zur Erzeugung von Schlagimpulsen, die beim Gesteinsbrechen benötigt werden;
    einen Schaft (4), der vor dem Schlagelement (10) in der Schlagrichtung (A) angeordnet ist und gegen den Körper (2) mit mindestens einem Lager (19, 20) gestützt wird und dessen rückwärtiges Ende mit einer Schlagoberfläche (11) zur Aufnahme von Schlagimpulsen versehen ist;
    ein Spülgehäuse (13), das einen Raum um den Schaft (4) bildet;
    mindestens einen ersten Spülkanal (14), entlang welchem Spühlmedium eingerichtet ist, um in das Spülgehäuse (13) geleitet zu werden; und
    mindestens einen zweiten Spülkanal (17), der im Schaft (4) vorgesehen ist und entlang welchem Spülmedium eingerichtet ist, um aus dem Spülgehäuse (13) herauszufließen, dadurch gekennzeichnet, dass
    das Spülmedium eingerichtet ist, um durch mindestens ein Lager (19, 20) zu fließen, das den Schaft (4) trägt, wodurch das Spülmedium zur Schmierung und Kühlung des Lagers (19, 20) eingerichtet ist
  2. Gesteinsbohrmaschine nach Anspruch 1, dadurch gekennzeichnet,
    dass der erste Spülmediumkanal (14) am Lager (19, 20) axial angeordnet ist und
    dass das Spülmedium eingerichtet ist, um im Wesentlichen radial durch das Lager (19, 20) zu fließen.
  3. Gesteinsbohrmaschine nach Anspruch 1, dadurch gekennzeichnet,
    dass das Lager (19, 20) in einem Abschnitt zwischen dem ersten Spülmediumkanal (14) und dem zweiten Spülkanal (17) axial angeordnet ist und
    dass das Spülmedium eingerichtet ist, um im Wesentlichen axial durch das Lager (19, 20) zu fließen.
  4. Gesteinsbohrmaschine nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass mindestens ein Lager (19, 20) mit mindestens einem Kanal versehen ist, um das Spülmedium durch das Lager (19, 20) zu leiten.
  5. Gesteinsbohrmaschine nach einem der vorangehenden Ansprüche, dadurchgekennzeichnet, dass das Spülgehäuse (13) den vordersten Teil des Körpers (2) bildet.
  6. Spülgehäuse, durch welches sich ein Schaft (4) einer Gesteinsbohrmaschine (1) axial anpassen lässt, wobei das Spülgehäuse (13) umfasst:
    mindestens ein Lager (19, 20) zum Tragen des Schafts (4); und
    mindestens einen ersten Kanal (14) zum Leiten von Spülmedium in das Spülgehäuse (13), dadurch gekennzeichnet,
    dass der erste Kanal (14) bei axialer Betrachtung am Lager (19, 20) angeordnet ist, wodurch das Spülmedium zur Schmierung und Kühlung des Lagers (19, 20) eingerichtet ist.
  7. Spülgehäuse nach Anspruch 6, dadurch gekennzeichnet, dass das Spülgehäuse (13) als Teil des Körpers (2) der Gesteinsbohrmaschine (1) anbringbar ist.
  8. Spülgehäuse nach Anspruch 7, dadurch gekennzeichnet, dass das Spülgehäuse (13) so angeordnet ist, dass es den vordersten Teil des Körpers (2) bildet.
EP04703808A 2003-01-22 2004-01-21 Gesteinsbohrmaschine und spülgehäuse Expired - Lifetime EP1592862B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20030097 2003-01-22
FI20030097A FI121026B (fi) 2003-01-22 2003-01-22 Kallioporakone ja huuhtelupesä
PCT/FI2004/000029 WO2004065755A1 (en) 2003-01-22 2004-01-21 Rock drill machine and flushing housing

Publications (2)

Publication Number Publication Date
EP1592862A1 EP1592862A1 (de) 2005-11-09
EP1592862B1 true EP1592862B1 (de) 2007-08-22

Family

ID=8565404

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04703808A Expired - Lifetime EP1592862B1 (de) 2003-01-22 2004-01-21 Gesteinsbohrmaschine und spülgehäuse

Country Status (8)

Country Link
EP (1) EP1592862B1 (de)
AT (1) ATE371090T1 (de)
AU (1) AU2004206069B2 (de)
DE (1) DE602004008427T2 (de)
FI (1) FI121026B (de)
PL (1) PL203202B1 (de)
WO (1) WO2004065755A1 (de)
ZA (1) ZA200505624B (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE531658C2 (sv) * 2006-10-02 2009-06-23 Atlas Copco Rock Drills Ab Slagverk jämte bergborrmaskin och bergborrigg
SE530572C2 (sv) * 2006-11-16 2008-07-08 Atlas Copco Rock Drills Ab Pulsmaskin för en bergborrmaskin, metod för skapande av mekaniska pulser i pulsmaskinen, samt bergborrmaskin och borrigg innefattande sådan pulsmaskin
JP2011523599A (ja) 2008-06-03 2011-08-18 アトラス コプコ ロツク ドリルス アクチボラグ 削岩機用フラッシングヘッドを有する装置及び方法、並びに該装置を備える削岩機

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE692411C (de) * 1938-05-20 1940-06-19 Maschf Spuelkopf fuer Gesteinsbohrhaemmer
US3490549A (en) * 1968-08-13 1970-01-20 Westinghouse Air Brake Co Hydraulic percussive drill
US4266620A (en) * 1980-02-11 1981-05-12 Wolgamott John E High pressure fluid apparatus
JPS5859886U (ja) * 1981-10-19 1983-04-22 株式会社小松製作所 ドリフタ装置
GB2212747A (en) * 1987-11-25 1989-08-02 Boart Hardmetals Shank adaptor for rock drilling machines

Also Published As

Publication number Publication date
AU2004206069A1 (en) 2004-08-05
FI121026B (fi) 2010-06-15
DE602004008427D1 (de) 2007-10-04
EP1592862A1 (de) 2005-11-09
ZA200505624B (en) 2006-05-31
PL203202B1 (pl) 2009-09-30
AU2004206069B2 (en) 2009-03-05
WO2004065755A1 (en) 2004-08-05
PL377197A1 (pl) 2006-01-23
ATE371090T1 (de) 2007-09-15
FI20030097A0 (fi) 2003-01-22
DE602004008427T2 (de) 2008-05-15
FI20030097A (fi) 2004-07-23

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