US3893521A - Rock drill - Google Patents
Rock drill Download PDFInfo
- Publication number
- US3893521A US3893521A US437913A US43791374A US3893521A US 3893521 A US3893521 A US 3893521A US 437913 A US437913 A US 437913A US 43791374 A US43791374 A US 43791374A US 3893521 A US3893521 A US 3893521A
- Authority
- US
- United States
- Prior art keywords
- striking bar
- passageway means
- striking
- bar
- chamber
- 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
Links
- 239000011435 rock Substances 0.000 title claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 21
- 238000004891 communication Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- 230000006872 improvement Effects 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 abstract description 15
- 230000002093 peripheral effect Effects 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 230000003116 impacting effect Effects 0.000 description 4
- 125000004122 cyclic group Chemical group 0.000 description 3
- 230000013011 mating Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B21/01—Arrangements for handling drilling fluids or cuttings outside the borehole, e.g. mud boxes
Definitions
- a solid piston is generally preferable to a piston of comparable external dimensions but including an axial bore for fluid flow.
- known hydraulic drill designs often include a gas charged energy absorbing accumulator which communicates with the rearwardmost end of the hammer piston for well known purposes such as the conservation of piston upstroke energy.
- FIG. 1 is a longitudinal central section of a fragmentary forward portion of a rock drill constructed in accordance with the principles of the present invention.
- FIG. 2 is a transverse section of a striking bar and chuck driving gear assembly taken on line 22 of FIG. 1.
- FIG. 1 illustrates the forward end portion of a rock drill generally designated at 10.
- Rock drill comprises a rigid generally annular housing 12 having disposed generally coaxially therewithin in a manner to be more fully detailed hereinbelow an elongated cylindrical striking bar 30.
- a forward end portion 3] of striking bar 30 which extends forwardly of the drill housing 12 has releasably coupled to the forwardmost end thereof one end of a forwardly extending drill steel 18 by well known means such as an annular coupling collar 80 which engages rope threads 82 on the adjacent ends of striking bar 30 and drill steel 18.
- the drill steel 18 has rigidly affixed upon its forwardmost end a well known drill bit 19.
- the rearwardmost end (not shown) of the striking bar 30 is engagable by well known cyclic impacting means such as a hydraulically reciprocable hammer piston (not shown) disposed within the housing 12 for the purpose of delivering repetitive percussive blows to the striking bar 30 and thereby producing a percussive drilling action upon a rock face 20 located forwardly adjacent the bit 19.
- cyclic impacting means are well known to those versed in the art and inasmuch as detailed description thereof is in any case not necessary for a complete disclosure of the present invention, such detailed description is not included herein. Applicant hereby refers to U.S. Pat. No. 3,470,970 for a detailed description of one such cyclic impacting means.
- a generally annular forward drill head 22 is rigidly affixed to the forwardmost end of housing 12 by any suitable means as for example by a plurality of bolts 24.
- a generally annular chuck driving gear 14 disposed within the housing 12 receives coaxially therewithin the striking bar 30 in a rotatable driving relationship.
- the gear 14 is captively retained within housing 12 in coaxial rotatable relationship therewith by suitable means such as forward and rearward thrust bearings 16 and 17, respectively, interposed between rotating and nonrotating elements.
- the striking bar 30 comprises a plurality of circumferentially spaced external splines 44 disposed intermediate the axial ends thereof, which splines 44 are drivingly engaged by a respective plurality of mating splines 46 spaced circumferentially about the internal periphery of an annular chuck driver member 48.
- a plurality of splines 50 circumferentially spaced about the external periphery of driver 48 are drivingly engaged by a respective plurality of mating splines 52 disposed about the radially outwardly adjacent internal periphery of gear 14 whereby striking bar 30 is maintained in rotatable driving relationship with gear 14.
- gear 14 is driven in rotation by suitable well known means (not shown) to impart axial rotation to the striking bar 30 during drill operation.
- suitable well known means not shown
- Applicant hereby refers to the hereinabove cited U.S. Pat. No. 3,470,970 for a description of one such rotational driving means.
- An annular bushing member 54 is disposed within the gear l4 radially intermediate a rearward inner peripheral portion thereof and a portion of striking bar 30 rearwardly adjacent splines 44 to provide radial support for the rearward portion of striking bar 30.
- An annular forward bushing member 38 is sealingly disposed within head 22 radially intermediate a forward inner peripheral portion 26 thereof and striking bar portion 3
- the bushing 38 is rigidly sealingly retained within portion 26 of head 22 longitudinally intermediate an annular shoulder 32 which defines the rearward terminus of periphery portion 26 and a radially inwardly extending flange 39 of an annular collar 40, which collar 40 releasably rigidly engages the forwardmost outer peripheral end of head 22 by any suitable means, for example mating threads 42.
- the present invention resides in an arrangement whereby flushing fluid such as air or water is introduced into the striking bar 30 intermediate the axial ends thereof by means comprising a port 58 which extends longitudinally through the bushing 38 to commu' nicate between the forward exterior of drill l and an interior chamber 70.
- Chamber 70 is substantially defined by radially adjacent peripheral portions of gear 14 and striking bar 30 and by annular seals 68, 66 and 64.
- the annular seal 64 is shown as being sealingly disposed rearwardly adjacent bushing 54 intermediate radially adjacent peripheral portions of striking bar 30 and gear 14.
- the forward annular seal 66 is sealingly disposed intermediate radially adjacent peripheral portions of striking bar portion 31 and bushing 38.
- the annular seal 68 is sealingly disposed radially intermediate at inner peripheral portion 34 of head 22 extending rearwardly of shoulder 32, and the radially inwardly adjacent periphery of gear l4.
- Port 58 is adapted at its forwardmost end by suitable means, such as threads 60, to couple a hose 62 which delivers a flushing fluid to the drill from any suitable source (not shown).
- suitable means such as threads 60
- the fluid so provided circulates within chamber 70 but is precluded by the sealing arrangements defined hereinabove from reaching bearings 16 and 17, the hammer piston (not shown) and all other drill rotating and impacting elements.
- the fluid supplied to chamber 70 flows into striking bar 30 via a plurality of circumferentially spaced transverse bores 72 extending radially therein to provide communication between the chamber 70 and a forwardly open axial bore 74, the rearward terminus of which is located forwardly of the rearward end of bar 30.
- the bores 72 are preferably spaced apart longitudinally within the longitudinal extent of the roots of splines 44 inasmuch as this location takes advantage of the maximum section modulus of the bar 30 thereby providing maximum support for the stress concentrations which occur during drill operation.
- the bore 74 communicates through an axially aligned bore 76 in drill steel I8 with suitable passageway means 78 in bit 19 whereby flushing fluid from a suitable source (not shown) enters the drill via port 58, circulates through the space 70 defined hereinabove, thence passes through bores 72 and into bore 74, thence through bore 76 and finally through passageway means 78 into the base of the hole being drilled thus flushing dust and other matter therefrom.
- an elongated percussively actuated rock drill wherein a piston member repetitively engages an elongated striking bar within a body member
- said improvement comprising: a chamber defined intermediate said striking bar and said body member; sealing means cooperable with said body member and said striking bar to restrict flow from said chamber; said striking bar including forward and rear bearing portions and a splined driver portion located axially intermediate said bearing portion; first longitudinally extending forwardly open passageway means in said striking bar having the rearward end thereof terminating intermediate the axial ends of said striking bar; second passageway means in said striking bar and communicating between said first passageway means and said chamber; said second passageway means including at least one transversely ex tending bore having the outer end thereof in communication with said chamber adjacent a root surface of a respective one of the splines of said driver portion; and third passageway means having one end thereof communicating with said chamber and having the other end thereof adapted to communicate with a fluid flow source.
- a striking bar having forward and rear bearing portions and a splined driver portion located axially intermediate said bearing portions and being adapted to be received within an elongated rock drill assembly wherein a piston member repetitively engages such a striking bar
- the improvement comprising: first longitudinally extending forwardly open passageway means in said striking bar having the rearward end thereof terminating intermediate the axial ends of said striking bar; second passageway means in said striking bar and communicating between said first passageway means and the exterior of said striking bar; and said second passageway means including at least one transversely extending bore having the outer end thereof in communication with the exterior of said striking bar adjacent a root surface of a respective one of the splines of said driver portion.
- a striking bar as specified in claim 4 wherein at least a major portion of said first passageway means is coaxial with respect to the longitudinal axis of such a striking bar.
Abstract
Description
Claims (5)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US437913A US3893521A (en) | 1974-01-30 | 1974-01-30 | Rock drill |
CA213,529A CA1005045A (en) | 1974-01-30 | 1974-11-12 | Rock drill |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US437913A US3893521A (en) | 1974-01-30 | 1974-01-30 | Rock drill |
Publications (1)
Publication Number | Publication Date |
---|---|
US3893521A true US3893521A (en) | 1975-07-08 |
Family
ID=23738440
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US437913A Expired - Lifetime US3893521A (en) | 1974-01-30 | 1974-01-30 | Rock drill |
Country Status (2)
Country | Link |
---|---|
US (1) | US3893521A (en) |
CA (1) | CA1005045A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0113654A2 (en) * | 1983-01-07 | 1984-07-18 | Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) | Rotating and/or percussive drilling machine |
US4805705A (en) * | 1985-04-04 | 1989-02-21 | Santrade Limited | Drill bit |
US20100059284A1 (en) * | 2008-03-31 | 2010-03-11 | Center Rock, Inc. | Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly |
US20100187017A1 (en) * | 2009-01-28 | 2010-07-29 | Center Rock, Inc. | Down-the-hole Drill Reverse Exhaust System |
US20110036636A1 (en) * | 2008-03-31 | 2011-02-17 | Center Rock, Inc. | Down-the-hole drill drive coupling |
US20110073373A1 (en) * | 2008-06-03 | 2011-03-31 | Rodert Joergen | Arrangement & method comprising a flushing head for a rock drilling machine, and rock drilling machine comprising the arrangement |
WO2011084093A1 (en) * | 2010-01-11 | 2011-07-14 | Atlas Copco Rock Drills Ab | Percussion rock drilling machine and drill rig |
WO2011149406A1 (en) * | 2010-05-28 | 2011-12-01 | Atlas Copco Rock Drills Ab | Rock drilling machine, removable cartridge, stop ring and drilling rig |
US8622152B2 (en) | 2009-01-28 | 2014-01-07 | Center Rock Inc. | Down-the-hole drill hammer having a sliding exhaust check valve |
WO2014081372A1 (en) * | 2012-11-21 | 2014-05-30 | Atlas Copco Rock Drills Ab | Device relating to a flushing head for a rock drilling machine and rock drilling machine |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US904692A (en) * | 1907-12-28 | 1908-11-24 | Cleveland Pneumatic Tool Co | Stone-working tool. |
US2056293A (en) * | 1934-05-18 | 1936-10-06 | Rasch Ludvik | Mechanical hammer |
US2125133A (en) * | 1936-04-10 | 1938-07-26 | Ingersoll Rand Co | Cleansing device for rock drills |
US2871826A (en) * | 1957-06-26 | 1959-02-03 | Joy Mfg Co | Hammer rock drill |
US3589352A (en) * | 1967-12-04 | 1971-06-29 | Atlas Copco Ab | Stone-working tool |
US3701386A (en) * | 1970-12-11 | 1972-10-31 | Dresser Ind | Hydraulic drifter |
-
1974
- 1974-01-30 US US437913A patent/US3893521A/en not_active Expired - Lifetime
- 1974-11-12 CA CA213,529A patent/CA1005045A/en not_active Expired
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US904692A (en) * | 1907-12-28 | 1908-11-24 | Cleveland Pneumatic Tool Co | Stone-working tool. |
US2056293A (en) * | 1934-05-18 | 1936-10-06 | Rasch Ludvik | Mechanical hammer |
US2125133A (en) * | 1936-04-10 | 1938-07-26 | Ingersoll Rand Co | Cleansing device for rock drills |
US2871826A (en) * | 1957-06-26 | 1959-02-03 | Joy Mfg Co | Hammer rock drill |
US3589352A (en) * | 1967-12-04 | 1971-06-29 | Atlas Copco Ab | Stone-working tool |
US3701386A (en) * | 1970-12-11 | 1972-10-31 | Dresser Ind | Hydraulic drifter |
Cited By (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0113654A2 (en) * | 1983-01-07 | 1984-07-18 | Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) | Rotating and/or percussive drilling machine |
EP0113654A3 (en) * | 1983-01-07 | 1985-05-15 | Vereinigte Edelstahlwerke Aktiengesellschaft (Vew) | Rotating and/or percussive drilling machine |
US4805705A (en) * | 1985-04-04 | 1989-02-21 | Santrade Limited | Drill bit |
US20100059284A1 (en) * | 2008-03-31 | 2010-03-11 | Center Rock, Inc. | Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly |
US8915314B2 (en) | 2008-03-31 | 2014-12-23 | Center Rock Inc. | Down-the-hole drill drive coupling |
US20110036636A1 (en) * | 2008-03-31 | 2011-02-17 | Center Rock, Inc. | Down-the-hole drill drive coupling |
US8800690B2 (en) * | 2008-03-31 | 2014-08-12 | Center Rock Inc. | Down-the-hole drill hammer having a reverse exhaust system and segmented chuck assembly |
US8794347B2 (en) * | 2008-06-03 | 2014-08-05 | Atlas Copco Rock Drills Ab | Arrangement and method comprising a flushing head for a rock drilling machine, and rock drilling machine comprising the arrangement |
US20110073373A1 (en) * | 2008-06-03 | 2011-03-31 | Rodert Joergen | Arrangement & method comprising a flushing head for a rock drilling machine, and rock drilling machine comprising the arrangement |
US8302707B2 (en) * | 2009-01-28 | 2012-11-06 | Center Rock Inc. | Down-the-hole drill reverse exhaust system |
US20100187017A1 (en) * | 2009-01-28 | 2010-07-29 | Center Rock, Inc. | Down-the-hole Drill Reverse Exhaust System |
AU2010208528B2 (en) * | 2009-01-28 | 2013-03-21 | Center Rock Inc. | Down-the-hole drill reverse exhaust system |
US8622152B2 (en) | 2009-01-28 | 2014-01-07 | Center Rock Inc. | Down-the-hole drill hammer having a sliding exhaust check valve |
AU2010340400B2 (en) * | 2010-01-11 | 2014-07-31 | Epiroc Rock Drills Aktiebolag | Percussion rock drilling machine and drill rig |
WO2011084093A1 (en) * | 2010-01-11 | 2011-07-14 | Atlas Copco Rock Drills Ab | Percussion rock drilling machine and drill rig |
US10060206B2 (en) | 2010-01-11 | 2018-08-28 | Epiroc Rock Drills Aktiebolag | Percussion rock drilling machine and drill rig |
WO2011149406A1 (en) * | 2010-05-28 | 2011-12-01 | Atlas Copco Rock Drills Ab | Rock drilling machine, removable cartridge, stop ring and drilling rig |
AU2011258934B2 (en) * | 2010-05-28 | 2014-09-18 | Atlas Copco Rock Drills Ab | Rock drilling machine, removable cartridge, stop ring and drilling rig |
CN102905855A (en) * | 2010-05-28 | 2013-01-30 | 阿特拉斯·科普柯凿岩设备有限公司 | Rock drilling machine, removable cartridge, stop ring and drilling rig |
WO2014081372A1 (en) * | 2012-11-21 | 2014-05-30 | Atlas Copco Rock Drills Ab | Device relating to a flushing head for a rock drilling machine and rock drilling machine |
CN105026680A (en) * | 2012-11-21 | 2015-11-04 | 阿特拉斯·科普柯凿岩设备有限公司 | Device relating to a flushing head for a rock drilling machine and rock drilling machine |
CN105026680B (en) * | 2012-11-21 | 2017-07-07 | 阿特拉斯·科普柯凿岩设备有限公司 | The device and rock drill related to the syringe pipe for rock drill |
US10145189B2 (en) | 2012-11-21 | 2018-12-04 | Epiroc Rock Drills Aktiebolag | Device relating to a flushing head for a rock drilling machine and rock drilling machine |
Also Published As
Publication number | Publication date |
---|---|
CA1005045A (en) | 1977-02-08 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: SULLIVAN MACHINERY COMPANY, A CORP OF DE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:JOY MANUFACTURING COMPANY;REEL/FRAME:004264/0414 Effective date: 19840330 Owner name: EMPIRE OF AMERICA FSA, Free format text: SECURITY INTEREST;ASSIGNOR:SULLIVAN MACHINERY COMPANY;REEL/FRAME:004262/0510 Effective date: 19840330 Owner name: MELLON BANK, N.A. AS AGENTS FOR THE BANKS. Free format text: SECURITY INTEREST;ASSIGNOR:SULLIVAN MACHINERY COMPANY,;REEL/FRAME:004264/0421 Effective date: 19840330 Owner name: EMPIRE OF AMERICA FSA Free format text: SECURITY INTEREST;ASSIGNOR:SULLIVAN MACHINERY COMPANY,;REEL/FRAME:004264/0421 Effective date: 19840330 |
|
AS | Assignment |
Owner name: MELLON BANK, N.A. AS AGENT FOR THE BANKS Free format text: SECURITY INTEREST;ASSIGNOR:SULLIVAN MACHINERY COMPANY;REEL/FRAME:004770/0223 Effective date: 19861110 |
|
AS | Assignment |
Owner name: SULLIVAN INDUSTRIES, INC., RIVER ROAD, CLAREMONT, Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SULLIVAN MACHINERY COMPANY, A DE CORP.;REEL/FRAME:004928/0436 Effective date: 19880705 Owner name: SULLIVAN INDUSTRIES, INC., A IL CORP., NEW HAMPSHI Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:SULLIVAN MACHINERY COMPANY, A DE CORP.;REEL/FRAME:004928/0436 Effective date: 19880705 |
|
AS | Assignment |
Owner name: CANNON INDUSTRIES, INC., NEW HAMPSHIRE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SULLIVAN INDUSTRIES, INC.;REEL/FRAME:005182/0994 Effective date: 19891025 |