US3744575A - Rock drill feed bar - Google Patents

Rock drill feed bar Download PDF

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Publication number
US3744575A
US3744575A US00176927A US3744575DA US3744575A US 3744575 A US3744575 A US 3744575A US 00176927 A US00176927 A US 00176927A US 3744575D A US3744575D A US 3744575DA US 3744575 A US3744575 A US 3744575A
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US
United States
Prior art keywords
bar member
bar
feed
piston
rock drill
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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
US00176927A
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English (en)
Inventor
A Strommes
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.)
Atlas Copco AB
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Atlas Copco AB
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 Atlas Copco AB filed Critical Atlas Copco AB
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Publication of US3744575A publication Critical patent/US3744575A/en
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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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E21B19/086—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods with a fluid-actuated cylinder

Definitions

  • the first bar member is box-shaped and undisplacably connected to the drill boom and lodges a hydraulic pistoncylinder actuating device which is arranged to move the bar members relative to each other for accomplishing extension and longitudinal displacement of the feed bar.
  • a rock drill carrying slide and a hose reel are guided upon the third bar member and are arranged to be fed along this bar member by means of a feeding device.
  • Ordinary rock drill feed bars are disadvantageous in that their availability is limited for use in narrow drifts and tunnels. There is an tendency to use a rock drill not only as a drifter for tunneling but also for other drilling purposes, for instance for roof bolting. As it is economically advantageous, to use as long drill rods as possible, ordinary rock drill feed bars have been adapted thereto and have today a length of 4-5m. That great length limits their availability in narrow tunnels and necessitates the use of feed bars of different lengths, one long type for drifting and other shorter types for other boring purposes, such as roof bolting. Thus one problem is how to carry out all drilling operations in small area tunnels using only one type of feed bar.
  • feed bar supported rock drill Another problem connected with drilling with a feed bar supported rock drill is that the forward end of the feed bar has to rest against the rock surface at the beginning of the drilling operation. That means that the feed bar has to be longitudinally displacable relative to its support which may consist of a drill boom.
  • the main object of the invention is to solve both of these problems at the same time by making a feed bar which is extendable as well as longitudinally displacable.
  • Another object of the invention is to make a very compact actuating means for accomplishing the abovementioned movements of the feed bar.
  • FIG. la shows a rock drill feed bar according to the invention in a shortened and retracted position.
  • FIG. lb shows the same feed bar in a forwardly displaced and shortened position.
  • FIG. 1c shows the same feed bar in a forwardly displaced and extended position.
  • FIG. 2 shows a cross section along line II-II in FIG. 1b.
  • F IG. 3 shows a shortened longitudinal section through a hydraulic actuating means, the purpose of gitudinal displacement of the feed bar.
  • the feed bar is generally indicated by the reference numeral 1 which is supported by a drill boom 2.
  • the feed bar comprises a first bar member 3 which is pivotably attached to a swingable'link arm 4 at the outer end of the drill boom 2. This arrangement makes it possible to swing the feed bar in vertical as well as horisontal planes by means of the boom for positioning the rock drill into the desired coordinates.
  • a second bar member 5 which is longitudinally displacable relative to the first bar member.
  • the second bar member 5 is provided with a drill rod centralizer 6and a spur 7. The latter is adapted to rest against the rock surface at the beginning of adrilling operation.
  • the second bar member 5 supports a third bar member 8 which is longitudinally displacable whichis to accomplish the extension as well as the lon- 2 relative to the second bar member.
  • a rock drill slide 9 which carries a rock drill 10.
  • the third bar member 8 also supports an ordinary feed device generally indicated at 11 (see FIG. 2) which is arranged to feed the rock drill 10 along the third bar member 8.
  • the feed device consists preferably of a piston-cylinder device which drives the rock drill slide by means of one or more drive chains.
  • the bar members are provided with elongated guides which have vertical as well as horisontal guide surfaces. See FIG. 2.
  • the guides of the first and third bar members, 3 and 8 respectively, are constituted by elongated ribs 14 and 15 which cooperate with guide flanges 16 on the second bar member 5.
  • a hose reel 12 which is moved along the third bar member by means of the feed device simultaneously with the rock drill but at half the speed.
  • the hose reel is designed to control the tension in the hoses which supply the rock drill with compressed air and flushing medium.
  • the third bar member 8 is provided with a drill rod centralizer 13 which serves as an intermediate drill centralizer when the third bar member is in its retracted position. See FIG'. 10.
  • the first bar member 3 is box-shaped and encloses a hydraulic actuating device 18. This actuating device is arranged to accomplish the longitudinal movement of the second and third bar members together relative to the first bar member 3 and of the third bar member relative to the second bar member.
  • the actuating device 18 consists of a main cylinder 19 which is provided with hydraulic fluid passages 20 and 21 for alternatively supplying and draining the cylinder 19..
  • a piston 22 is movably arranged within the main cylinder 19 andis connected to a piston rod 23 which extends out of the cylinder 19 at the forward end of the latter.
  • the piston rod 23 is provided with a coupling means 24 for connection with a corresponding means on the second bar member
  • the piston rod 23 is tubular and constitutes a second cylinder in which is arranged a second piston 25.
  • the piston 25 is connected to apiston rod 26 which extends out of the main cylinder 19 at the rear end of the latter.
  • the pistonrod 26 is provided with a coupling device 27 by which it is connected to a corresponding device 17 on the third bar member 8.
  • the second cylinder 23 communicates with hydraulic fluid passages 28 and 29 in the piston rod 26'.
  • the passage 28 is constituted by a tube which is coaxial with andlocated within the piston rod 26.
  • the passage 29 is constituted by the annular space between the tube and the innerwall of the piston rod 26.
  • the feed bar operates as follows: when drilling a hole in the rock formation at certain coordinates, the feed bar is directed into position by swinging of the drill boom 2 and the swingable arm 4. Then, hydraulic fluid is supplied to the main cylinder 19 of the actuating device through the rear passage 21, wher .upon the piston 22 is forced forwards. The piston 22 pushes, by means of the piston rod 23, the second bar member 5 forwards until the spur 7 gets into contact with the rock surface. Any fluid flow, to or from the internal cylinder, is not initiated at this stage. Thus the inner piston 25 remains stationary relative to the inner cylinder 23 and is displaced together with the latter relative to the main cylinder. That means that the second and third bar members, 5 and 8 respectively, are advanced together toward the work surface without any relative displacement, whereby, the feed bar retains its length.
  • the movement of third bar member 8 is a rested relative to the second bar member 5 to prevent further backward movement. This arrestment is carried out by means of a chain (not shown).
  • Other types of locking devices may, of course, be used.
  • the third bar member 8 Upon maximum extension of the feed bar, the third bar member 8 is automatically stopped when the piston 25 reaches its rear end position.
  • the purpose of the arresting device is to define the maximum length of the feed bar that corresponds to the length of a selected drill rod.
  • the arresting device prevents the drill bit from being restricted into the drill centralizer 6 upon return movement of the feed device.
  • the rock drill is started and is advanced by the feeding device 11.
  • the feeding movement is accomplished by forward movement of the rock drill relative to the third bar member 8 on one hand and by forward displacement of the third bar member 8 relative to the second bar member 5 on the other hand.
  • the latter movement is accomplished by introducing hydraulic fluid into the rear part of the inner cylinder through the passage 29. The two movements take place simultaneously.
  • the feed bar 1 When boring of a second hole, using the same drill rod, the feed bar 1 is shifted to other coordinates by means of the drill boom 2. Then, the axial position of the feed bar is adjusted so that the spur 7 the rock surface. This longitudinal displacement of the feed bar is carried out in the same way as at the beginning of the first described drilling operation, namely by supplying hydraulic fluid to the rear part of the main cylinder 19. The rock drill is started and the feeding and actuating devices are activated so as to make the slide 9 and the third bar member 8 feed the rock drill forwards. Another hole is now being drilled.
  • the third bar member 8 When drilling transverse holes in narrow drifts or tunnels the third bar member 8 is locked in its forwardmost positon relative to the second bar member by means of the locking device, whereby the feed bar attains its shortest length. In this contracted position, the feed bar requires a very small space for drilling holes in different directions in a tunnel. On the other hand drifting tunnels the locking deivce is not used but the maximum when length of the feed bar is utilized for drilling with long drill rods.
  • the feed bar according to the invention is very compact. This result is obtained mainly by the fact that there is only one actuating device which has two functions and which is common for the extension movement as well as for the longitudinal displacement.
  • a feed bar for a rock drill rod comprising:
  • a first bar member ridgidly connected to a drill boom for directing the rock drill towards a work surface
  • said third bar member slidably supporting the rock drill
  • said second bar member having a work surface engaging member
  • actuating means effective to move said second bar member together with said third bar member relative to said first bar member in a direction toward the work surface until said surface engaging member abuts against the work surface and thereby establishes the longitudinal displacement of the feed bar relative to the work surface.
  • a feed bar according to claim 1 in which said actuating means are further effective to move said third bar member relative to said second bar member in a direction away from the work surface upon engagement of the second bar member with the work surface and means being provided for arresting the movement of said third bar member upon having moved a predetermined distance corresponding to the length of the drill rod to be used and thereby define the drill feed range.
  • a rock drill feed bar according to claim 1, characterized in that the first bar member is box-shaped and encloses the actuating means.
  • a rock drill feed bar characterized in that the actuating means is constituted by a piston-cylinder device which comprises a main cylinder which is rigidly attached to said first bar member, a first piston which is annular and slidably guided in said main cylinder, a first piston rod connecting said first piston and said second bar member, said first piston rod being tubular constituting a second cylinder, a second piston slidably guided in said second cylinder, and a second piston rod connecting said second piston and said-third bar member.
  • a piston-cylinder device which comprises a main cylinder which is rigidly attached to said first bar member, a first piston which is annular and slidably guided in said main cylinder, a first piston rod connecting said first piston and said second bar member, said first piston rod being tubular constituting a second cylinder, a second piston slidably guided in said second cylinder, and a second piston rod connecting said second piston and said-third bar member.
  • a rock drill feed bar characterized in that said first and second piston rods extend in opposite directions from the main cylinder.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
US00176927A 1970-09-08 1971-09-01 Rock drill feed bar Expired - Lifetime US3744575A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE12137/70A SE345495B (de) 1970-09-08 1970-09-08

Publications (1)

Publication Number Publication Date
US3744575A true US3744575A (en) 1973-07-10

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ID=20295211

Family Applications (1)

Application Number Title Priority Date Filing Date
US00176927A Expired - Lifetime US3744575A (en) 1970-09-08 1971-09-01 Rock drill feed bar

Country Status (10)

Country Link
US (1) US3744575A (de)
AU (1) AU463035B2 (de)
BE (1) BE772270A (de)
CA (1) CA945540A (de)
DE (1) DE2144370C2 (de)
FI (1) FI57167B (de)
FR (1) FR2107117A5 (de)
GB (1) GB1324224A (de)
SE (1) SE345495B (de)
ZA (1) ZA715824B (de)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973634A (en) * 1973-09-27 1976-08-10 Atlas Copco Aktiebolag Device for feeding a reel along a track
US3980144A (en) * 1974-06-17 1976-09-14 Gardner-Denver Company Rock drill feed mechanism
US4207805A (en) * 1977-05-11 1980-06-17 Atlas Copco Aktiebolag Feed beam
US4537263A (en) * 1981-04-29 1985-08-27 Ingenior Thor Furuholmen A/S Method and means for adjusting the feed support of a rock drilling unit into a given distance from the drilling location
FR2735813A1 (fr) * 1995-06-20 1996-12-27 Tamrock Oy Ensemble destine a un organe telescopique d'avance pour machine de forage de roches
US6105684A (en) * 1996-08-08 2000-08-22 Cram Australia Pty Ltd Roof bolter or a roof bolt installation apparatus
US6814155B1 (en) * 2000-04-14 2004-11-09 Joy M M Delaware, Inc. Bolting rigs
WO2005116390A1 (en) * 2004-05-31 2005-12-08 Sandvik Mining And Construction Oy. Telescopic feed beam for rock drill
WO2006045134A1 (de) * 2004-10-28 2006-05-04 Alois Wimmer Einrichtung zum führen und spannen von versorgungsleitungen
US20090261231A1 (en) * 2008-04-16 2009-10-22 The Boeing Company Power assist lever arm attachment
US20100139941A1 (en) * 2007-05-18 2010-06-10 Sandvik Mining And Construction Oy Arrangement for employing drill steel centralizer travelling on feed beam of rock drill machine
US20110147092A1 (en) * 2009-12-17 2011-06-23 Terex Corporation Hose tensioner for a rock drill system
CN101137818B (zh) * 2005-03-14 2011-08-17 阿特拉斯·科普科岩石钻探公司 岩石钻孔装置以及结合有测量钻孔机器的位置的装置的钻探设备
CN115199819A (zh) * 2022-07-27 2022-10-18 湖南鹏翔星通汽车有限公司 一种推进梁用油管自动调节装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2520438A1 (fr) * 1982-01-22 1983-07-29 Pele Cie Glissiere de marteau-perforateur a ancrage
FI97253C (fi) * 1994-01-05 1996-11-11 Tamrock Oy Syöttöpalkki kallioporakonetta varten
US11274506B2 (en) * 2018-06-05 2022-03-15 Joy Global Underground Mining Llc Drilling and bolting device

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3973634A (en) * 1973-09-27 1976-08-10 Atlas Copco Aktiebolag Device for feeding a reel along a track
US3980144A (en) * 1974-06-17 1976-09-14 Gardner-Denver Company Rock drill feed mechanism
US4207805A (en) * 1977-05-11 1980-06-17 Atlas Copco Aktiebolag Feed beam
US4537263A (en) * 1981-04-29 1985-08-27 Ingenior Thor Furuholmen A/S Method and means for adjusting the feed support of a rock drilling unit into a given distance from the drilling location
FR2735813A1 (fr) * 1995-06-20 1996-12-27 Tamrock Oy Ensemble destine a un organe telescopique d'avance pour machine de forage de roches
US5884712A (en) * 1995-06-20 1999-03-23 Tamrock Oy Arrangement for a telescope feeder of a rock-drilling machine
US6105684A (en) * 1996-08-08 2000-08-22 Cram Australia Pty Ltd Roof bolter or a roof bolt installation apparatus
US6814155B1 (en) * 2000-04-14 2004-11-09 Joy M M Delaware, Inc. Bolting rigs
US20070227752A1 (en) * 2004-05-31 2007-10-04 Janne Voimanen Telescopic Feed Beam for Rock Drill
WO2005116390A1 (en) * 2004-05-31 2005-12-08 Sandvik Mining And Construction Oy. Telescopic feed beam for rock drill
CN100580215C (zh) * 2004-05-31 2010-01-13 山特维克矿山工程机械有限公司 用于钻岩机的伸缩进给梁
US7712545B2 (en) 2004-05-31 2010-05-11 Sandvik Mining And Construction Oy Telescopic feed beam for rock drill
US20090134261A1 (en) * 2004-10-28 2009-05-28 Alois Wimmer Device for guiding and tensioning supply lines
WO2006045134A1 (de) * 2004-10-28 2006-05-04 Alois Wimmer Einrichtung zum führen und spannen von versorgungsleitungen
US7735576B2 (en) 2004-10-28 2010-06-15 Alois Wimmer Device for guiding and tensioning supply lines
CN101137818B (zh) * 2005-03-14 2011-08-17 阿特拉斯·科普科岩石钻探公司 岩石钻孔装置以及结合有测量钻孔机器的位置的装置的钻探设备
US20100139941A1 (en) * 2007-05-18 2010-06-10 Sandvik Mining And Construction Oy Arrangement for employing drill steel centralizer travelling on feed beam of rock drill machine
US8256529B2 (en) * 2007-05-18 2012-09-04 Sandvik Mining And Construction Oy Arrangement for employing drill steel centralizer travelling on feed beam of rock drill machine
US20090261231A1 (en) * 2008-04-16 2009-10-22 The Boeing Company Power assist lever arm attachment
US7789167B2 (en) * 2008-04-16 2010-09-07 The Boeing Company Power assist lever arm attachment
US20110147092A1 (en) * 2009-12-17 2011-06-23 Terex Corporation Hose tensioner for a rock drill system
US8443916B2 (en) 2009-12-17 2013-05-21 Caterpillar Global Mining Equipment Llc Hose tensioner for a rock drill system
CN115199819A (zh) * 2022-07-27 2022-10-18 湖南鹏翔星通汽车有限公司 一种推进梁用油管自动调节装置

Also Published As

Publication number Publication date
CA945540A (en) 1974-04-16
GB1324224A (en) 1973-07-25
AU463035B2 (en) 1975-07-17
ZA715824B (en) 1972-04-26
AU3308971A (en) 1973-03-08
BE772270A (fr) 1972-01-17
FR2107117A5 (de) 1972-05-05
DE2144370A1 (de) 1972-07-06
FI57167B (fi) 1980-02-29
DE2144370C2 (de) 1974-09-12
SE345495B (de) 1972-05-29

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