CA2199579A1 - Rotary rock drill - Google Patents
Rotary rock drillInfo
- Publication number
- CA2199579A1 CA2199579A1 CA002199579A CA2199579A CA2199579A1 CA 2199579 A1 CA2199579 A1 CA 2199579A1 CA 002199579 A CA002199579 A CA 002199579A CA 2199579 A CA2199579 A CA 2199579A CA 2199579 A1 CA2199579 A1 CA 2199579A1
- Authority
- CA
- Canada
- Prior art keywords
- leadscrew
- feednut
- drill rod
- drill
- rotary
- 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.)
- Abandoned
Links
Landscapes
- Earth Drilling (AREA)
Abstract
The invention concerns a rotary rock drill which has a rotatable, axially immobilised leadscrew threaded through a feednut to which a drill head is connected. Drive and gearing means operate to rotate the leadscrew relative to the feednut so that the feednut advances linearly on the leadscrew. A
linear drive transfer mechanism operates to transfer the linear advance of the feednut to a drill rod which is chucked to a spindle carried by the drillhead and which is parallel to and spaced apart from the leadscrew. A rotary drive transfer mechanism operates simultaneously to transfer rotation of the leadscrew to the drill rod during linear advance thereof.
linear drive transfer mechanism operates to transfer the linear advance of the feednut to a drill rod which is chucked to a spindle carried by the drillhead and which is parallel to and spaced apart from the leadscrew. A rotary drive transfer mechanism operates simultaneously to transfer rotation of the leadscrew to the drill rod during linear advance thereof.
Description
- 2 -"ROTAI~Y ROCK DRILL"
BACKG~OUND TO THE Il~ENT~ON
THIS invention relat~s to a rotary rock drill.
Rotary screw feed Ai~nn~ drills are used w~dely for drilling rock in ul~de.g~vulld miIles. A typical e ~'- of a known screw feed ~ m~
iS ill..~n.,t.~ res 1 and 2 ofthe ~ec .~ ,ji~ d~c~w~gs. The dr~ll has a hollow r~,~ o carrying a ch~k 12. A drill rod 14 ~vith a diamo~d bit 16 at its leading end passes tbrough the r~ . 10 and is gripped by the chuck 12. All air motor 18, typicaUy a vane-type r~ motor. is mr-nnt~rl on a casing 19 and is driven by com?~d air. The motor drives a gear 20 which meshes w~th a gear 22. The gear 22 is fast on a shaft 24 which also carnes anot~er gear 26. The gear 2~ meslles with a gear 28 v-~t~,d on ~ quill 3~ which has inwardly directed splines or keys 32 that engage ~n grooves or keyways 34 in the r~JS~ o, allowing dle . to slide forwardly~ in ~e ~lir~, Liwl indicated by ~e arrow 35, relative to the quill. The gear 26 meshes with a ~ear 38 camed by a fee~ut 40 through which the L~,e..l~c~. is ~lI.e~c~
Rotation of the gear 20 drives t~e gears 22 and 26. The gear 22 in turndrives ~e gear 28 and, with it, the quill 30 and Ihe r~ . 10, ~xfhile the ge~r 26 in turn drives ~e ~gear 38 and, v~ith it, the feeduut 40. If the fee~cl~r lO and the feednul 40 have a right hand ~re~d, the gear ratios are seleet~l for a cloc~. ;..~ drive, such th~t the feednut rotates slo~1ver ~an ther~e~-.~ to effect forward movement of the feedscle~r, as inrlir~tf'A by the """~pl 35 In the more c~.. ~.. ~ngen.f~lt, the f~le~ and feednut have a left ha~ ~ead. ~n ~is case ~e gear ratios are sele~d su~ , for a clockwise drive, ~e feednut rotates faster t~an the fc~ J to calLse the n~ ~ for~vard movement of the fcc~ he forward and r~ lglu!-~iol~ 1 m~ tof~Ihef~ J10is Ir~ dtothe drill rod 14 which acco~ y rotates and moves fon~rardly at the s-ame line~ aDd an~ular ~peed as the fee~.., thereby to drill a hole 42 into a rock fonnation 44.
In a typic~l case, the fe~.,~ . lO is 1,5m long to enable a hole of co.lc~ o~ np de~th to be d~illed. The leng~ ofthc r~d~ . can however be probl~ 1 if the drill is situated in a mine worlcing, such as a b~nel or p~g~, vvhich has a liInited width of 1,5m. I-f, for ;~.s~m. ~ ~e width of the mine . .Jll~illg is 1,5m it is not ~ I lc to drill, because it is ~ ~.ce~
for the Ç~d~lc~! to move folvvardly durin~ d~illing. Also, it is not pncsible to add a filrther drill rod at ~e rear of the d~ill rod 14 because the r~d~~
a~ready occul. ~c the filll width of the . Jl~;-)g, One solutinn to the problernwould be to malce the feedscrew 10 shorter, Lhereby allowing a further drill rod to be added. This reduces ~e available feed len~ and r~ ,S fi~
re~ ;n~, which is ~ener~lly j",~ l Thus it ~nll be app~eciated ~at ~e COll~ inn~l rock drill as dec~bed above and as i~ tc~l in Figures I and 2 is llnc~ P for use ~II ~r~ine wolk~g~ of rectr~-tpA width SUMMARY OF T~E; INVENT~ON 2 1 9 9 5 7 9 According to tbe present invention t~ere is pro~nded a rotary rock d~ill corr~rricin~ a rot~t~bl~, axially imm~ili~A l~d~ .., a feednut lhLv.lgh which the Ic~~ is ~d, drive and gearing means ope ~ to rotate the h~ v relative to the feednut so ~ the feednut advances linearly on the leadscfew, linear dri~re traDsfer nleans o~ in use to transfer ~he linear ad~ ce of the feednut to a drill rod parallel to and spaced apart from the leadscre~, and rotary drive transfer means o~,.~ se to ~ansfer ro~ion of ~e lea~ w to the drill rod during li~ear ~d~.a~ of ~e drill rod.
In the l"o~ d ~ml~o~lim~nt the linear dr~ve ~ sfer means c~S~r~ise~ a nllhP~ to which are connf~t,,d bo~ the feednut and a spindle to w}~h lhe drill rod ca~ be .~h.l.~
In ~is emhorlim~nt~ the ro~y drive tra~sfer means Gomrri~ a quill whichis rot~ ly fast wi~ tlle lea~ew aDd a gear tr~in, inrl~ gears fast u~ith the quill and w~dl dle spin~lle ~I.ecLvely, for ~ f~ ~; .L rota~ion fiom ~e leadscrew ~ the s~indle, alld hence to a drill rod cl. ~ -d in use to ~e spindle.
The drive and geanng means may ~ e a motor driving ~e~ e ge~r tr~ins which operate to rotate the leadscrew and feednut at difterent speeds so that there is relative rotation be~een ~e l~d~ c~ andthe feednutwhic~
causes ~e feednut to advance on the l~
~- 21 99579 B~E~ DESCR~PTION OF THE ~)~AWINGS
The ~nvention will now be ~Iç~ihe~ ~n more detail, wi~ le~ lce to the ~cc~ z..j~ a~ in which:
Fi~ure 1 s~ows a ~ t;t; p~tiy S~tiOnp~ side view of a conventional rock drill;
Figqre 2 shows a cross-section at the lille 2-2 ~n Figure l; and Figure 3 shows a diagr~atic, pa~ly secti~n~d side view of a rock drill hccu~ to ~e preserlt inventio~
DESCRIPTION O~ A ~RE~RRl; n EM~ODIhqENT
As described above, Figures 1 and 2 i t~ a conr~"lt;Gnal rock drill wbich s~ers ~rom the dis~l~,~tage that it is ~ for use in rnine ~rkirle~ of .c~ ~ ;eh~ width This ~ of the c~ Lional rock drill is addressed by the rock drill u~)GS3~l by ~e present invention and a ~JlL~Ll,lL~1 e ~ of which is illu~l~l in Figure 3. In this e ~ho~ e-~, the f~~ 0 of Fig~e I is replaced by a s~lid 1 '- ~ l00 which is n1O~ L1 for rotation in ~ ;s 102 carried by ~ dle 104 An air motor l06, conv.,.ficl~ of ~e same type as is used in conventionsl drills, is ....~ to the cradle and drives a ~!ear 108 which meslles with a ~ear 110 ~ast on the l~d~ 100.
-Thus the ledds~e.r 100 rotates at a speed ~i~.~ nA' ~f on the OU~I~t speed of the motor and the rati~ of the gears 108 and 110. Tlle le~.~ passes through a quill 112 ~hich, lilce the quill 30 io Fi~,~e 1, has inwardly directed splines or keys wich e~ e in ~oo~es or k~ 114 in dle lea~lsc~w. Thus rotation of the l~ds~c~.r causes C~ G~1~On~ rotalion of the qu~ll.
The quill carr~es a gear 115 ~xhich ~neshes wi~ a gear 116 on a sha~ 118 which also ca~ies a gear 120. Ihe gear 120 meshes with a gear 122 carried by a feednut 124 through which the l~dsr-l... is l}l~G~.de~. The gear 116 meshes ~th a gear 126 OIl a spindle 128 throug~ which a drill rod 130 passes The drill rod 130 is ~~hllr~l to the spin~lle by a chuck 132.
Ihe spindle 128 is con~ d to a ~nllh~ 134 which is also cQn~ ~,t~d to the feednut 124. The ra~o of ~e gear tra~n cO~ , of the gears 11~, 116, 120 and 122 is c;llosen so that ~ere ~s rdative rota~ion ~~ the kadsL.~,, 100 and the ~eedIlut 124 q1hich causes ~e fe~ut to screw forwardly on the leads~ ,... The foru~ard mo~t of the feednut 124 is 1.,....rr rl~ to the drillhead 134, spindle 128 and drill rod 130, as indicated by the arrow 136.
ThlLs the drill rod is dri~en rul .. . dl~ at the same linear speed as the feedn~lt and is rotated at a speed /~let - ~ by the oueput speed of ~e air motor 106 and ~e rel~ive ratios of ~e gear ~inS rnnCichr~ of the gears 108, 110 an~
115, 116 and 126.
~- f~mn~ to tbe prior ~rt confi~ ;on of Figures 1 and ~, re-~k~l~L i~-~of the dri~l can be effect by discoDnecting the drive ~o the feednut 40. The feedllut ~s ~en held s~a~inn9ry by means of a lever ~ ~L ~,e~ with a hole in the f~
The motor 18 is driven ~n a ~li~inn O~Y~J~ to tbat used for llrilli~, ie.
~nti~lo~ L w~se. This re~ ts the feedscrew. The re~raction take~ place at hi~h speed because the feednut 40 is st~tiQn~y and there is acco,.li~
a~ relative l~.o~ e~l ~ch. ~ n the feednut and the r~,&d3ele.~. Prior to ~ .n of the fc~ lO, the chuck 12 is lo.,~ retraction a new drill rod is fitted and the chuck 1~ is re~ l,tn ~
Ln the embo~l;"~ of ~ e 3, a similar yl~)c~lure can be carried out during h~rL ;n~, In this case, The drive to the feednut 124 is ~liscor ~ , the feednut is held sta~onary and ~e motor 106 is lc~ d to retract ~e ~lnllh~ 1;4 at a rapid rale It will be appreciated ~at this method of re-chllr~in~ ~quin,s a bi-dire~tirnsl motor 18, 106. The lleccsa;ly for a bidirectional motor 18, 10~
can be avoided in cases where ~e feednut 40, 124 and feedscrew 10 or l~ds~ . 100 ha~re a left hand ~ead. Dun~g drilling, the geaI ratios arG
sele~ed such ~at, for a clockwise dri~e, the feedn~ 40, 124 rotates faster thanthefce~L.c. 10/leads~c~ 100, therebyto ~ t~forward lo~e~e,l~
of the fceds."c~ 10 or drillhe~d 134. When re-rk.~L i..p is to talce place, the feednut 40, 124 is lleld St~tif~n~ry so lhat the clocA-.;~ drive applied to the f~d~;lc~ 10/leadsc~ew 100 ca~ses ~e r~ or tlnll~ to retract rapidly.
The eonfig~ ;Qn illuall~t~l in ~i~ure 3 has an i~llpo~ ,~Lge when COnl~ Gd to thc con~- .I;o,.~l CQnf~ dlion of Figure 1. The spindle 128 can much short~r than the Ç~scre~- 10, because the feed length is not dct .n;~.~d by the sp~ndle, but by the feed leng~ of the l~d~l~. 100.
.. . .
2i ~ 79 The length of the spindle 128 together with the chuck 132 may, for inct~nrP
be as little as 0,5m as olJposed to ~e typical 1,5m f~l~ u,l'c~d in the conventional an~em~nt. This ~ turn means ~lat, in a n~ine worl~ing having a r~i.,ted width of, say, 1,5m, anod er drill rod of 1,0m length can be added behind the drill rod 130. The feed len~h which is ;~ttqir-al- in each instance is dct~ ..i~d by the distance that the feednut can adlrance on the leadscrew 100. However the length ofthe leadscrew may be only sLightly less than ~e width of the mine ~orking, because it does not move ~cially as in the cu~ ional system, thereby allow~ng a ~lhs~nti~l feed lengdl to be ob~ .A
BACKG~OUND TO THE Il~ENT~ON
THIS invention relat~s to a rotary rock drill.
Rotary screw feed Ai~nn~ drills are used w~dely for drilling rock in ul~de.g~vulld miIles. A typical e ~'- of a known screw feed ~ m~
iS ill..~n.,t.~ res 1 and 2 ofthe ~ec .~ ,ji~ d~c~w~gs. The dr~ll has a hollow r~,~ o carrying a ch~k 12. A drill rod 14 ~vith a diamo~d bit 16 at its leading end passes tbrough the r~ . 10 and is gripped by the chuck 12. All air motor 18, typicaUy a vane-type r~ motor. is mr-nnt~rl on a casing 19 and is driven by com?~d air. The motor drives a gear 20 which meshes w~th a gear 22. The gear 22 is fast on a shaft 24 which also carnes anot~er gear 26. The gear 2~ meslles with a gear 28 v-~t~,d on ~ quill 3~ which has inwardly directed splines or keys 32 that engage ~n grooves or keyways 34 in the r~JS~ o, allowing dle . to slide forwardly~ in ~e ~lir~, Liwl indicated by ~e arrow 35, relative to the quill. The gear 26 meshes with a ~ear 38 camed by a fee~ut 40 through which the L~,e..l~c~. is ~lI.e~c~
Rotation of the gear 20 drives t~e gears 22 and 26. The gear 22 in turndrives ~e gear 28 and, with it, the quill 30 and Ihe r~ . 10, ~xfhile the ge~r 26 in turn drives ~e ~gear 38 and, v~ith it, the feeduut 40. If the fee~cl~r lO and the feednul 40 have a right hand ~re~d, the gear ratios are seleet~l for a cloc~. ;..~ drive, such th~t the feednut rotates slo~1ver ~an ther~e~-.~ to effect forward movement of the feedscle~r, as inrlir~tf'A by the """~pl 35 In the more c~.. ~.. ~ngen.f~lt, the f~le~ and feednut have a left ha~ ~ead. ~n ~is case ~e gear ratios are sele~d su~ , for a clockwise drive, ~e feednut rotates faster t~an the fc~ J to calLse the n~ ~ for~vard movement of the fcc~ he forward and r~ lglu!-~iol~ 1 m~ tof~Ihef~ J10is Ir~ dtothe drill rod 14 which acco~ y rotates and moves fon~rardly at the s-ame line~ aDd an~ular ~peed as the fee~.., thereby to drill a hole 42 into a rock fonnation 44.
In a typic~l case, the fe~.,~ . lO is 1,5m long to enable a hole of co.lc~ o~ np de~th to be d~illed. The leng~ ofthc r~d~ . can however be probl~ 1 if the drill is situated in a mine worlcing, such as a b~nel or p~g~, vvhich has a liInited width of 1,5m. I-f, for ;~.s~m. ~ ~e width of the mine . .Jll~illg is 1,5m it is not ~ I lc to drill, because it is ~ ~.ce~
for the Ç~d~lc~! to move folvvardly durin~ d~illing. Also, it is not pncsible to add a filrther drill rod at ~e rear of the d~ill rod 14 because the r~d~~
a~ready occul. ~c the filll width of the . Jl~;-)g, One solutinn to the problernwould be to malce the feedscrew 10 shorter, Lhereby allowing a further drill rod to be added. This reduces ~e available feed len~ and r~ ,S fi~
re~ ;n~, which is ~ener~lly j",~ l Thus it ~nll be app~eciated ~at ~e COll~ inn~l rock drill as dec~bed above and as i~ tc~l in Figures I and 2 is llnc~ P for use ~II ~r~ine wolk~g~ of rectr~-tpA width SUMMARY OF T~E; INVENT~ON 2 1 9 9 5 7 9 According to tbe present invention t~ere is pro~nded a rotary rock d~ill corr~rricin~ a rot~t~bl~, axially imm~ili~A l~d~ .., a feednut lhLv.lgh which the Ic~~ is ~d, drive and gearing means ope ~ to rotate the h~ v relative to the feednut so ~ the feednut advances linearly on the leadscfew, linear dri~re traDsfer nleans o~ in use to transfer ~he linear ad~ ce of the feednut to a drill rod parallel to and spaced apart from the leadscre~, and rotary drive transfer means o~,.~ se to ~ansfer ro~ion of ~e lea~ w to the drill rod during li~ear ~d~.a~ of ~e drill rod.
In the l"o~ d ~ml~o~lim~nt the linear dr~ve ~ sfer means c~S~r~ise~ a nllhP~ to which are connf~t,,d bo~ the feednut and a spindle to w}~h lhe drill rod ca~ be .~h.l.~
In ~is emhorlim~nt~ the ro~y drive tra~sfer means Gomrri~ a quill whichis rot~ ly fast wi~ tlle lea~ew aDd a gear tr~in, inrl~ gears fast u~ith the quill and w~dl dle spin~lle ~I.ecLvely, for ~ f~ ~; .L rota~ion fiom ~e leadscrew ~ the s~indle, alld hence to a drill rod cl. ~ -d in use to ~e spindle.
The drive and geanng means may ~ e a motor driving ~e~ e ge~r tr~ins which operate to rotate the leadscrew and feednut at difterent speeds so that there is relative rotation be~een ~e l~d~ c~ andthe feednutwhic~
causes ~e feednut to advance on the l~
~- 21 99579 B~E~ DESCR~PTION OF THE ~)~AWINGS
The ~nvention will now be ~Iç~ihe~ ~n more detail, wi~ le~ lce to the ~cc~ z..j~ a~ in which:
Fi~ure 1 s~ows a ~ t;t; p~tiy S~tiOnp~ side view of a conventional rock drill;
Figqre 2 shows a cross-section at the lille 2-2 ~n Figure l; and Figure 3 shows a diagr~atic, pa~ly secti~n~d side view of a rock drill hccu~ to ~e preserlt inventio~
DESCRIPTION O~ A ~RE~RRl; n EM~ODIhqENT
As described above, Figures 1 and 2 i t~ a conr~"lt;Gnal rock drill wbich s~ers ~rom the dis~l~,~tage that it is ~ for use in rnine ~rkirle~ of .c~ ~ ;eh~ width This ~ of the c~ Lional rock drill is addressed by the rock drill u~)GS3~l by ~e present invention and a ~JlL~Ll,lL~1 e ~ of which is illu~l~l in Figure 3. In this e ~ho~ e-~, the f~~ 0 of Fig~e I is replaced by a s~lid 1 '- ~ l00 which is n1O~ L1 for rotation in ~ ;s 102 carried by ~ dle 104 An air motor l06, conv.,.ficl~ of ~e same type as is used in conventionsl drills, is ....~ to the cradle and drives a ~!ear 108 which meslles with a ~ear 110 ~ast on the l~d~ 100.
-Thus the ledds~e.r 100 rotates at a speed ~i~.~ nA' ~f on the OU~I~t speed of the motor and the rati~ of the gears 108 and 110. Tlle le~.~ passes through a quill 112 ~hich, lilce the quill 30 io Fi~,~e 1, has inwardly directed splines or keys wich e~ e in ~oo~es or k~ 114 in dle lea~lsc~w. Thus rotation of the l~ds~c~.r causes C~ G~1~On~ rotalion of the qu~ll.
The quill carr~es a gear 115 ~xhich ~neshes wi~ a gear 116 on a sha~ 118 which also ca~ies a gear 120. Ihe gear 120 meshes with a gear 122 carried by a feednut 124 through which the l~dsr-l... is l}l~G~.de~. The gear 116 meshes ~th a gear 126 OIl a spindle 128 throug~ which a drill rod 130 passes The drill rod 130 is ~~hllr~l to the spin~lle by a chuck 132.
Ihe spindle 128 is con~ d to a ~nllh~ 134 which is also cQn~ ~,t~d to the feednut 124. The ra~o of ~e gear tra~n cO~ , of the gears 11~, 116, 120 and 122 is c;llosen so that ~ere ~s rdative rota~ion ~~ the kadsL.~,, 100 and the ~eedIlut 124 q1hich causes ~e fe~ut to screw forwardly on the leads~ ,... The foru~ard mo~t of the feednut 124 is 1.,....rr rl~ to the drillhead 134, spindle 128 and drill rod 130, as indicated by the arrow 136.
ThlLs the drill rod is dri~en rul .. . dl~ at the same linear speed as the feedn~lt and is rotated at a speed /~let - ~ by the oueput speed of ~e air motor 106 and ~e rel~ive ratios of ~e gear ~inS rnnCichr~ of the gears 108, 110 an~
115, 116 and 126.
~- f~mn~ to tbe prior ~rt confi~ ;on of Figures 1 and ~, re-~k~l~L i~-~of the dri~l can be effect by discoDnecting the drive ~o the feednut 40. The feedllut ~s ~en held s~a~inn9ry by means of a lever ~ ~L ~,e~ with a hole in the f~
The motor 18 is driven ~n a ~li~inn O~Y~J~ to tbat used for llrilli~, ie.
~nti~lo~ L w~se. This re~ ts the feedscrew. The re~raction take~ place at hi~h speed because the feednut 40 is st~tiQn~y and there is acco,.li~
a~ relative l~.o~ e~l ~ch. ~ n the feednut and the r~,&d3ele.~. Prior to ~ .n of the fc~ lO, the chuck 12 is lo.,~ retraction a new drill rod is fitted and the chuck 1~ is re~ l,tn ~
Ln the embo~l;"~ of ~ e 3, a similar yl~)c~lure can be carried out during h~rL ;n~, In this case, The drive to the feednut 124 is ~liscor ~ , the feednut is held sta~onary and ~e motor 106 is lc~ d to retract ~e ~lnllh~ 1;4 at a rapid rale It will be appreciated ~at this method of re-chllr~in~ ~quin,s a bi-dire~tirnsl motor 18, 106. The lleccsa;ly for a bidirectional motor 18, 10~
can be avoided in cases where ~e feednut 40, 124 and feedscrew 10 or l~ds~ . 100 ha~re a left hand ~ead. Dun~g drilling, the geaI ratios arG
sele~ed such ~at, for a clockwise dri~e, the feedn~ 40, 124 rotates faster thanthefce~L.c. 10/leads~c~ 100, therebyto ~ t~forward lo~e~e,l~
of the fceds."c~ 10 or drillhe~d 134. When re-rk.~L i..p is to talce place, the feednut 40, 124 is lleld St~tif~n~ry so lhat the clocA-.;~ drive applied to the f~d~;lc~ 10/leadsc~ew 100 ca~ses ~e r~ or tlnll~ to retract rapidly.
The eonfig~ ;Qn illuall~t~l in ~i~ure 3 has an i~llpo~ ,~Lge when COnl~ Gd to thc con~- .I;o,.~l CQnf~ dlion of Figure 1. The spindle 128 can much short~r than the Ç~scre~- 10, because the feed length is not dct .n;~.~d by the sp~ndle, but by the feed leng~ of the l~d~l~. 100.
.. . .
2i ~ 79 The length of the spindle 128 together with the chuck 132 may, for inct~nrP
be as little as 0,5m as olJposed to ~e typical 1,5m f~l~ u,l'c~d in the conventional an~em~nt. This ~ turn means ~lat, in a n~ine worl~ing having a r~i.,ted width of, say, 1,5m, anod er drill rod of 1,0m length can be added behind the drill rod 130. The feed len~h which is ;~ttqir-al- in each instance is dct~ ..i~d by the distance that the feednut can adlrance on the leadscrew 100. However the length ofthe leadscrew may be only sLightly less than ~e width of the mine ~orking, because it does not move ~cially as in the cu~ ional system, thereby allow~ng a ~lhs~nti~l feed lengdl to be ob~ .A
Claims
THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1.
A rotary rock drill comprising a rotatable, axially immobilised leadscrew, a feednut through which the leadscrew is threaded, drive and gearing means operable to rotate the leadscrew relative to the feednut so that the feednut advances linearly on the leadscrew, linear drive transfer means operating in use to transfer the linear advance of the feednut to a drill rod parallel to andspaced apart from the leadscrew, and rotary drive transfer means operating in use to transfer rotation of the leadscrew to the drill rod during linear advance of the drill rod.
2.
A rotary rock drill according to claim 1 wherein the linear drive transfer means comprises a drillhead to which are connected both the feednut and a spindle to which the drill rod can be chucked.
3.
A rotary rock drill according to claim 2 wherein the rotary drive transfer means comprises a quill which is rotationally fast with the leadscrew and gears, including gears fast with the quill and with the spindle respectively, for transferring rotation from the leadscrew to the spindle, and hence to a drill rod chucked in use to the spindle.
4.
A rotary rock drill according to claim 4 wherein the drive and gearing means comprises a motor driving gears which operate to rotate the leadscrew and feednut at different rotational speeds so that there is relative rotation between the leadscrew and the feednut which causes the feednut to advance on the
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1.
A rotary rock drill comprising a rotatable, axially immobilised leadscrew, a feednut through which the leadscrew is threaded, drive and gearing means operable to rotate the leadscrew relative to the feednut so that the feednut advances linearly on the leadscrew, linear drive transfer means operating in use to transfer the linear advance of the feednut to a drill rod parallel to andspaced apart from the leadscrew, and rotary drive transfer means operating in use to transfer rotation of the leadscrew to the drill rod during linear advance of the drill rod.
2.
A rotary rock drill according to claim 1 wherein the linear drive transfer means comprises a drillhead to which are connected both the feednut and a spindle to which the drill rod can be chucked.
3.
A rotary rock drill according to claim 2 wherein the rotary drive transfer means comprises a quill which is rotationally fast with the leadscrew and gears, including gears fast with the quill and with the spindle respectively, for transferring rotation from the leadscrew to the spindle, and hence to a drill rod chucked in use to the spindle.
4.
A rotary rock drill according to claim 4 wherein the drive and gearing means comprises a motor driving gears which operate to rotate the leadscrew and feednut at different rotational speeds so that there is relative rotation between the leadscrew and the feednut which causes the feednut to advance on the
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| ZA961942 | 1996-03-11 | ||
| ZA96/1942 | 1996-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2199579A1 true CA2199579A1 (en) | 1997-09-11 |
Family
ID=25585581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002199579A Abandoned CA2199579A1 (en) | 1996-03-11 | 1997-03-10 | Rotary rock drill |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2199579A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472686A (en) * | 2020-04-12 | 2020-07-31 | 刘丽华 | Punching pole erecting machine for telegraph pole |
| CN113863847A (en) * | 2021-09-17 | 2021-12-31 | 山东大学 | Constant-speed drilling device and stratum evaluation method |
| CN114215480A (en) * | 2021-11-15 | 2022-03-22 | 张家口路桥建设集团有限公司 | Sand flow geological rotary drill and long pile casing slurry pore-forming method adopting same |
-
1997
- 1997-03-10 CA CA002199579A patent/CA2199579A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111472686A (en) * | 2020-04-12 | 2020-07-31 | 刘丽华 | Punching pole erecting machine for telegraph pole |
| CN111472686B (en) * | 2020-04-12 | 2021-12-03 | 国网江苏省电力有限公司盐城供电分公司 | Punching pole erecting machine for telegraph pole |
| CN113863847A (en) * | 2021-09-17 | 2021-12-31 | 山东大学 | Constant-speed drilling device and stratum evaluation method |
| CN114215480A (en) * | 2021-11-15 | 2022-03-22 | 张家口路桥建设集团有限公司 | Sand flow geological rotary drill and long pile casing slurry pore-forming method adopting same |
| CN114215480B (en) * | 2021-11-15 | 2023-09-15 | 张家口路桥建设集团有限公司 | Rotary drilling drill for drift sand geology and long casing slurry pore-forming method adopting rotary drilling drill |
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