ZA200505624B - Rock drill machine and flushing housing - Google Patents
Rock drill machine and flushing housing Download PDFInfo
- Publication number
- ZA200505624B ZA200505624B ZA200505624A ZA200505624A ZA200505624B ZA 200505624 B ZA200505624 B ZA 200505624B ZA 200505624 A ZA200505624 A ZA 200505624A ZA 200505624 A ZA200505624 A ZA 200505624A ZA 200505624 B ZA200505624 B ZA 200505624B
- Authority
- ZA
- South Africa
- Prior art keywords
- flushing
- housing
- bearing
- duct
- rock drill
- Prior art date
Links
- 238000011010 flushing procedure Methods 0.000 title claims description 98
- 239000011435 rock Substances 0.000 title claims description 29
- 238000009527 percussion Methods 0.000 claims description 23
- 206010016825 Flushing Diseases 0.000 claims description 2
- 238000010276 construction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
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)
- 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)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Description
ROCK DRILL MACHINE AND FLUSHING HOUSING
, [0001] 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 hous- ing.
[0002] 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; and at least one first duct for leading flushing medium into the flushing housing.
[0003] A drawback in percussive rock drill machines can be insuffi- cient lubrication and cooling of the bearings in the shank. The problem may result in inadequate service life of the bearings in the shank. Furthermore, in "some cases, the excessive axial length of the rock drill machine may cause "problems.
[0004] The object of the present invention is to provide a new and improved flushing housing and a rock drill machine provided with such a flush- ing housing.
[0005] 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. . [0006] The flushing housing of the invention is characterized in that the first duct is arranged at the bearing when viewed axially. . [0007] 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. In addition, 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. Furthermore, the invention en- ables a shorter construction of the flushing housing. , [0008] The essential idea of a preferred embodiment of the inven- tion is that 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 ra- dially. Since the bearing and the feed of flushing medium are arranged to over- lap, the flushing housing may be particularly short when viewed axially.
[0009] The essential idea of a preferred embodiment of the inven- tion is that 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 be- tween the flushing housing and the body, facilitating the manufacture of the flushing housing. The assembly is also easier and the structure is more dura- ble since there are fewer seals. Furthermore, the body of the drill machine may be axially shorter there being no separate front cover.
[0010] The invention will be described in more detail in the attached drawings, wherein
Figure 1 is a schematic side view of a rock drill machine,
Figure 2 is a schematic sectional view of the front end and flushing housing of a rock drill machine of the invention, and
Figure 3 is a schematic sectional view of the front end and flushing housing of another rock drill machine of the invention.
[0011] For the sake of clarity, the figures show the invention in a simplified manner. In the figures, like parts are designated with like reference numerals. . DETAILED DESCRIPTION OF THE INVENTION
[002] Figure 1 shows a rock drill machine 1 comprising a body 2, a . percussion device 3 and a shank 4. In addition, 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.
[0013] Figure 2 shows that the percussion device 3 comprises a ) percussion element 10 for generating percussion pulses to a percussion sur- face 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 in- stance by means of pressure medium or electricity. Alternatively, the percus- sion 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. Alternatively, the shank 4 and the tool 6 may constitute an inte- grated entity. Furthermore, 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. In some cases, 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. Furthermore, the front bearing 19 may be arranged in ’ a section between the first flushing duct 14 and the second flushing duct 17.
This being so, at least part of 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. In the construction according to Fig- ure 2, the foremost section of the body 2 is formed by the front cover 21, which may be fastened to the flushing housing 13. Alternatively, the front cover 21 may be an integrated part of the flushing housing 13, in which case there are . fewer mating surfaces. In addition, this being so, the body 2 can be made axi- ally shorter. . [0014] Figure 3 shows a section of an alternative structure of the flushing housing 13. In this case, 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 manu- facture 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. Not only 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. On the other hand, the back seal 16 may be adapted in another body piece than the flushing housing 13. The first flushing duct 14 may be ar- ranged 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. In addition, 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.
[0015] Let it be mentioned that the flushing medium may be gas or fluid. Typically, the flushing medium is water or a mixture of water and one or more additives.
[0016] The bearings 15, 16 of the shank 4 may be roller bearings, slide bearings or other bearings suitable for the purpose. For example, in the solution according to Figure 3, the shank 4 may be supported with slide bear- ings 15 and 16. In addition, the front bearing 15 is provided with one or more substantially radial ducts in a manner allowing the flushing medium to flow ra- dially through the bearing 15. On the other hand, in the construction according : to Figure 2, the flushing medium may flow substantially axially through clear- ances in the bearing 15 and/or through one or more ducts passing through the bearing 15.
[0017] In some cases, the flushing medium may be arranged to flow through the rear bearing 20. Furthermore, both bearings 19, 20 may be located in the flushing housing 13, and the feed of flushing medium may even be ar-
ranged to enable the flow of flushing medium through both bearings 19, 20.
, [0018] A separate flushing housing 13 may also be arranged in front of the actual body 2 of the rock drill machine 1.
. [0019] The drawings and the related description are only intended to illustrate the inventive idea.
The details of the invention may vary within the scope of the claims.
Claims (8)
1. A rock drill machine comprising at least: . a body (2); a percussion element (10) for generating percussion pulses required in rock breaking; a shank (4) arranged in front of the percussion element (10) in the percussion direction (A) and supported to the body (2) with at least one bear- ing (19, 20) and whose rear end is provided with a percussion surface (11) for receiving percussion pulses; a flushing housing (13) that forms a space around the shank (4), at least one first flushing duct (14) along which flushing medium is arranged to be led into the flushing housing (13); and at least one second flushing duct (17) provided in the shank (4) and along which flushing medium is arranged to flow out of the flushing housing (13), characterized inthat the flushing medium is arranged to flow through at least one bearing (19, 20) that supports the shank (4). :
2. A rock drill machine as claimed in claim 1, characterized in that the first flushing medium duct (14) is arranged axially at the bearing (19, 20), and that the flushing medium is arranged to flow substantially radially through the bearing (19, 20).
3. A rock drill machine as claimed in claim 1, characterized in that the bearing (19, 20) is arranged axially in a section between the first flushing medium duct (14) and the second flushing duct (17), and that the flushing medium is arranged to flow substantially axially through the bearing (19, 20).
:
4. A rock drill machine as claimed in any one of the preceding claims, characterized in that at least one bearing (19, 20) is provided with at least one duct for leading the flushing medium through the bearing (19,
20).
5. A rock drill machine as claimed in any one of the preceding claims, characterized in that the flushing housing (13) constitutes the foremost part of the body (2).
: 6. A flushing housing through which a shank (4) of a rock drill ma- chine (1) is axially adaptable, the flushing housing (13) comprising: . at least one bearing (19, 20); and at least one first duct (14) for leading flushing medium into the flush- ing housing (13),characterized in that the first duct (14) is arranged at the bearing (19, 20) when viewed axially.
7. A flushing housing as claimed in claim6, characterized in that the flushing housing (13) is attachable as part of the body (2) of the rock drill machine (1).
8. A flushing housing as claimed in claim 7,characierized in that the flushing housing (13) is arranged to constitute the foremost part of the body (2).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI20030097A FI121026B (en) | 2003-01-22 | 2003-01-22 | Rock drill and flush housing |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA200505624B true ZA200505624B (en) | 2006-05-31 |
Family
ID=8565404
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA200505624A ZA200505624B (en) | 2003-01-22 | 2005-07-13 | Rock drill machine and flushing housing |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1592862B1 (en) |
AT (1) | ATE371090T1 (en) |
AU (1) | AU2004206069B2 (en) |
DE (1) | DE602004008427T2 (en) |
FI (1) | FI121026B (en) |
PL (1) | PL203202B1 (en) |
WO (1) | WO2004065755A1 (en) |
ZA (1) | ZA200505624B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE531658C2 (en) * | 2006-10-02 | 2009-06-23 | Atlas Copco Rock Drills Ab | Percussion along with rock drill and rock drill rig |
SE530572C2 (en) * | 2006-11-16 | 2008-07-08 | Atlas Copco Rock Drills Ab | Pulse machine for a rock drill, method for creating mechanical pulses in the pulse machine, and rock drill and drill rig including such pulse machine |
CA2724381A1 (en) | 2008-06-03 | 2009-12-10 | Atlas Copco Rock Drills Ab | Arrangement and method comprising a flushing head for a rock drilling machine, and rock drilling machine comprising the arrangement |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE692411C (en) * | 1938-05-20 | 1940-06-19 | Maschf | Flushing head for rock drills |
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 (en) * | 1981-10-19 | 1983-04-22 | 株式会社小松製作所 | drifter device |
GB2212747A (en) * | 1987-11-25 | 1989-08-02 | Boart Hardmetals | Shank adaptor for rock drilling machines |
-
2003
- 2003-01-22 FI FI20030097A patent/FI121026B/en not_active IP Right Cessation
-
2004
- 2004-01-21 EP EP04703808A patent/EP1592862B1/en not_active Expired - Lifetime
- 2004-01-21 DE DE602004008427T patent/DE602004008427T2/en not_active Expired - Lifetime
- 2004-01-21 AU AU2004206069A patent/AU2004206069B2/en not_active Expired
- 2004-01-21 AT AT04703808T patent/ATE371090T1/en not_active IP Right Cessation
- 2004-01-21 WO PCT/FI2004/000029 patent/WO2004065755A1/en active IP Right Grant
- 2004-01-21 PL PL377197A patent/PL203202B1/en unknown
-
2005
- 2005-07-13 ZA ZA200505624A patent/ZA200505624B/en unknown
Also Published As
Publication number | Publication date |
---|---|
DE602004008427D1 (en) | 2007-10-04 |
FI20030097A0 (en) | 2003-01-22 |
ATE371090T1 (en) | 2007-09-15 |
AU2004206069B2 (en) | 2009-03-05 |
PL203202B1 (en) | 2009-09-30 |
AU2004206069A1 (en) | 2004-08-05 |
FI20030097A (en) | 2004-07-23 |
FI121026B (en) | 2010-06-15 |
DE602004008427T2 (en) | 2008-05-15 |
EP1592862A1 (en) | 2005-11-09 |
WO2004065755A1 (en) | 2004-08-05 |
EP1592862B1 (en) | 2007-08-22 |
PL377197A1 (en) | 2006-01-23 |
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