GB2225047A

GB2225047A - Drum cutter-loader

Info

Publication number: GB2225047A
Application number: GB8923510A
Authority: GB
Inventors: Klaus Oberste-Beulmann; Friedhelm Henrich
Original assignee: Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
Current assignee: Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
Priority date: 1988-11-17
Filing date: 1989-10-18
Publication date: 1990-05-23
Also published as: GB8923510D0; DE3838862A1; JPH02194291A

Description

Z/L25047 "Drum cutter-loader" The invention relates to a drum

cutter-loader with a machine body which is composed of individual structural units and with cutting drums which are arranged on swivellable support arms so as to be adjustable in height at both ends of the machine body. The driving motors of these cutting drums are arranged together with I- the winch motors inside the machine body at right angles -ion of travel of the machine and are to the direct connected together by gearing by means of a gear chain which is in a housing chamber.

The invention has the objective of producing a drum cutter-loader whose cutting heads can readily easily be and repaired and can be used for various types r but can also be adapted to different conditions of use underground.

According to the invention there is provided a drum cutter-loader with a machine bod,, which is co-,nosei of individual structural elements and with cutting drums which are mounted so as to be adjustable in heiht at both end's- of the machine on swivellable support arms and whose driving motors are arranged inside the machine body together with two winch motors at right angles to the direction of travel of the machine and are connected together b,., gearing b v a gear chain which. I - in e assembed ine of mach.

housing chamber, the cutting heads at the ends of the machine body having bores which extend over their entire width and are parallel to each other, of which one accepts the drum motor another the winch motor and a ' the support arm.

third the swivelling shaft OIL A cutting head constructed in this way can be made to be occupied inside the machine body on both sides with detachably arranged gear boxes, of which the coalface-sided common communication heads, whilst goaf side of both cutting heads produce a geared ' the respective communication between the drur- m z)- of - which is arranged cutting head and the gearing element centrallv to its swivel shaft an-' is in geared commun i cation wi.h the gear chain of the support a -.:7 A cutting head of this type of construction is distinguished by its easy assembly and the good accessibility of the driving motozz7z:corn-imodated in 4±, but also of the swivel shaft of the support a rm. As the gear boxes comprise enclosed oil-tight structural units, they can also be remove-,., the mach4 Lne body underground in order to be able D get to the swivel V 4 sh-=I.t or the dri Lng motors, %_Jthcut any g re a t A CUt,_4 ng he-,on 1.1, fol cutte.

gear box produces the g e a r edl between the drur. motors of both cutting the gear boxes which can be fixed on the expenditurre On fL----Ln-,,. tII.S wa. can be used nct can be driven over a longwall conveyor means which is equipped w,..h a goafsided or coal face-sided rack, but it can also be used with cutter-loaders which are arranged beside the longwall conveyor means and therefore in the winning track. Because multilateral possibilities of use, proposed type of construction are required besides a reduction o of their cuttina heads of the in larger numbers of pieces, which, f the stock-keeping which has been necessary hitherto for both types of machines, also leads to the reduction of their manufacturing costs.

If the axes of all bores are arranged inside the horizontal plane of symmetry of the cutting head and they are allowed to emerge on the support arm side in a -he lateral recess extending over the entire height c' 11 cutting head, the appropriate support arm of the cutting drum can be accommodated inside the machine profile, and this cuttina ends Of the machine bodv. ends of the machine body, or goaf-sided recess, and can therefore with cutter-loaders which travel beside - WO head can also be used at each of the 41 It can also be fixes -- t b,3th either with a coal face-sided also be used the lona-,;all cop.ve,,-or means and kee,-:) their cutting drums sc t ha t t he- are adiustal,-,,le in height on goaf-sided support arms.

-L 1 t,; ' Special',, advantageous in the case of --- design, ho..,e,v,c-r, is the fact that the driving whe-el of the wi--- engaging in the rack, when the rack which serves to move on the cutter- loader is arranged on the coal face side, can be accommodated immediately behind the support arm and therefore inside the contour of the machine housing.

It is also advantageous if the swivel shaft bore and the bore of the cutting head accepting the winch motor are provided with identical diameters. It is then possible to arrange the winch motor at the end of the machine body if required, and in front of the swive'L shaft, or even to mount the swivel shaft at the end of the machine body, which is specially to be recommended in the case of cutter-loaders which can be driven beside the longwall conveyor means on account of the shorter length of their support arm.

A p-articularly short overall length of the machine body is produced if the swivel shaft of tChe support arm and the winch motor are arranged isoaxially to each other in a common cull-ting head bore. Here, the s.,; vel shaft can accept in its central' nore a r,)1.atabl-,,, r.-.--unte, bush which, on the one hand, engages with the gear chain of the support arm, and on the other hand,' fror- , the cuttina head bore, gear box and is connected by gearing to its gear cha'n, - L.

and the bush also encloses the winch motor which i -accommodated in its bore. In this case, the cutti:,:: head has on ly twe bores, Of Wil-11ch one ac--e-tF t m---T / ' 1 ',:

-, 2 - projecting engages in the goaf-sided 1 driving swivel length motor of the cutting drum and the other the shaft and the winch motor, whereby its overall and therefore also the length dimension of the machine is noticeably reduced. Advantageously, in the case of this arrangement of the winch motor, its support-arm-sided end is rotatably supported inside the bush, in order to ease the shifting of the motor inside the goaf-sided gear box.

t arm movement, and therefore the height Ihe support adjustment of the cutting drums in the case of cutter loaders of this type of construction, is brought about by bilaterally actuatable pressure cylinders which are fixed underneath and above the gear chain and are arranged here in the longitudinal direction of the machine. Their pistons enclose the toothed swivel shaft end between them and mesh with the toothed swivel L shaft end with the toothing which is fixed between their -h pressure cvlinders are constantly front ends. As boll.

i ite directions. the,,r act upon the actuated swivel shaft end in the same direction of rotation, bring the cutting drum into the desired height position and kee-D it in this position.

The invention may be performed in various ways and preferred er.-, bodiments thereof will now be described wtl-. reference to the accompanying drawings, in Fla-ure 1 a drum cutter-loader ac--.,)rl--:,7 r 1 J / m w invention in a plan view; Figure 2 shows another embodiment of the invention, in which the winch motor is arranged inside the swivel shaft of the support arm; Figure 3 shows another drum cutter-loader of the invention with a winch motor which is arranged at the end of the cutting head; Figure 4 shows a drum cutter-loader which is equipped with the cutting heads according to the invention and can be driven beside the longwall conveyor means; Figure 5 shows slewing gear which is in a gear box, in a section along the line A-A of Figure 6; Figure 6 shows a section along the line Figure 5; Figure 7 shows a structural detail of the cutter-loader which can be driven beside the machine bodv.

A cutter-loader 1 shown in over a longwall conveyor means B-13 of Figure 1 can b e dri-ven 2, which is equipped on the goaf side With a rack 3 (or a coil chain)- which extends over the entire length of the path Of ric)ve.-nen'. of the machine. In this rack 3 or coil chain engage tw-driving wheels 4 oil the cutter-loader 1 which are inside a special housing 5 and are driven via reduction gear 6 b,., a motor 7, whose speed can be controlled- Mi/M51 6 11 loosened S 7 of the 14 a r e energy energy f the f the op 1 erating shows, the cutter-loader 1 is essentially composed of the energy distri ibution unit 13 and the two connectinc cutting heads 15. These t h re:4 - structural Un4c are bclted to-:--e-.he-r an" a-rc m j / m w, support arm thereb create the driving notion of the cutter-loader 1 in both directions. The roof of the seam is exposed by a drum 9 running in front, which is rotatably mounted on a 8, and the material which is is discharged into the longwall conveyor means 2 with the aid of blades 10 of the cutting drum 9 and of a dozer blade 12 which can be swivelled about the cutting drum axis 11. The trailing cutting drum 9 carries out the floor cut, so that behind the cutter-loader 1 the existing seam is loosened over its entire height and the cut track is completely cleared. in the centre part of the drum cutter-loader 1 there is an energy distribution unit 13, which is connected via a line (not shown) to the drift contactor which i -he drift. The two winch motors at the end of -ors cutter-loader 1 together with the drum mot supplied with driving energy from this - 13. Also situated in the distribution unit distribution unit 13 is the control syster-n cutter-loader 1, and on the goafi-sided wall energy distribution unit 13 are arranged the elements necessarv for this.

As Figure 1 additionally connected together by tie rods A gear box 16, which is arranged on the coa and likewise forms an enclosed separate contains a gear chain 17 which produces communication between the two drum motors 14 (not shown).

1 face side component, the geared and couples both rigidly together. Each of the two cutting heads is equipped with a drum motor 14, which on the one hand, engages with a shaft butt in the last wheel Of the gear chain 17 of the coal-face-sided gear box 16, and on the other hand acts propulsively on a gear chain 18, which is in the goaf-sided gear box 19. 'Ihis goaf-sided gear box 19 also forms a special component which is outwardly sealed in a fluidtight manner and is flange mounted on the goaf-sided wall of the cutt-ing head 1-5 The gear chain 18 which is in this gear box 19 produces the aeared communication between the output sh-;zl't butt of the drum motor 14 and a gearing element 20, which is arranged centrally to the axis of a swivel shaft 2-1 of the support arm 8 an--- is led thr:,-- = b::re 22 --f the swivel shaft 21 into the area of the support ari- 8 of the cutting drur. 9. Here the gt-=n.ring element: 20 is connected to a gear chain (not sh3wn), v--a which the driving -notion o:1L7 the drum m----r 14 passes a reduction gear (not shown) which is inside the cu+.t-in-:, drur. body.

This cearin. e enien t 2C, -s 7 r,lj/MTl, -Q- example illustrated in Figure 2, can be composed of a bush which is rotatably mounted inside the central swivel shaft bore 22 and is connected by gearing to the gear chain 8 on the one hand, and to the gear chain 18 of the gear box 19 on the other. It is, however, also possible, as shown in the example of Figure 3, to provide as a gearing element 20, a shaft which produces the geared communication between the gear chain 18 of the gear box 19 and that of the support arm 8, and is likewise led through the central bore 22 of the support arm swivel shaft 21.

In the example of Figure 1, there is situated, on the swivel shaft bore 22, a swivel device the inside of 24 which brings the support arm 8 of the cutting drum 9 into the operating position desired in each case. it is composed of several hydraulic motors (not shown), which create the swivelling movement and are supplied by a f lu id, enercv dJ-stLr4-but4on unit 13 or at the front end ol- the cutting head 15. In this case, the fluid pump, like the auxiliarv drum 25, is supplied with driving energy via the gear chain 18 of the gear box 19 -Y,,hic. is led bevond the front end of the cutting head 15 and is a -the front end of the machine body, which faces away from the auxiliary dru-- 25.

In the examples sh-.)..,n ir, Figures 1, -1 a n,J 4, e Z c7 h pump with pressure fluid, which is inside the 1 13,/lilbl -g- -10of the two cutting heads 15 is equipped with bores 26, 27 and 28, which run at right angles to the longitudinal direction of the cutter- loader 1 and extend over the entire width of the cutting head 15, of which the bore 26 which is adjacent to the energy distribution unit 13 accepts the drum motor 14. In the example of Figure 1, firstly the winch motor 7 and thereafter the swivel shaft 21 of the support arm 8 are accommodated in the two succeeding bores 27 and 28. on the one hand, the bores 26, 27 and 28 are sealed by the drum support arm 8 or by a cover 23 (Figure 3) or the gear box 16, whilst -ixed here on t he other hand merely the gear box 19 'L ensures the sealing of the bores 26, 27 and 28. Here, the reduction gear 6 of the winch motor 7 is so arranged that, with its section projecting from the bore 27 of the cutting head 15, it passes through a spur gear wheel 29 of the gear chain 18 which wheel is arranged centrally to the axis of the gear 6, and extends into the housing 5 together wit,'-, its output shaft butt which is fitted with a driving wheel 4, the housing being situated above the rack or coil chain 3.

In the example of Figure 2, the bush which forms the gearing element 20 which conveys the rotating movement- the aoa-.

of the druri motor 14 from the gear chain 18 o'. F - sided gear box 101 to the gear chain of the support a= 2 of t he cutting drums 9, encloses the winch r-,otor 7.

ri/. T.- 1 ' h A The latter is arranged here centrally to the swivel shaft 21 and is rotatably supported inside the bush 20 with its support-arm-sided end, by means of a roller bearing 30 A toothed clutch 31 closes the support armsided bush end and introduces the rotating motion of the bush 20 into the interior of the support arm 8 of the cutting drum 9. Not only the bush 20 which transmits the rotating motion of the drum motor 14 but also the swivel shaft retained by respectively. gear 6 are, 1Che gear box 19.

If the bore accepting the winch motor 7 and the bore 27 and 28 of the cutting head 15 accepting the swivel shaft 21 are formed with the same diameter, swivel shaft 21 and winch motor 7 can be inter changed with each other, and the driving wheel 4 which creates the aivancing -,i-Dve.- nent of the cutter-loader 1 anj engagess- in the rack 3 can be arranged at the outermost end of the machine body. Here the driving wheel 4 is situa- ted in '±y of the machine skid (not sh wnl, the immediate vie o therefore in a position in which good engagement and t tween the rack 3 and the driving wheel 4 conditions bet can be exnected.

The exam-le of Fiaure a cutter-loader 21 is rotatably mounted, and both are two pairs of roller bearings 32 and 33 Winch motor 7 and the relevant reduction on the other hand, unrotatably mounted in is S ' - -12 which can be driven beside the longwall conveyormeans 2. Drur. cutter-loaders in this form are instituted and driven mainly in deeper seams. In this cutter-loader 1, the energy distribution is above the longwall conveyor means 2. At each of the front ends it is provided with a machine bridge 34 and engages with a narrow housing shoulder 35 between both cutting heads, to which it is firmly fixed. this example j The driving motion in embodiment passes to the two cutting drums 9 merely via the coal face-sided gear boxes 16, whose gear chains 17 couple both drum motors 14 together and extend to the front of the axis of the swivel shafts 21 of both support arms 8. The support arms 8, in the case of this type of machine, are situated on the goaf side of the machine body, above the rack 3 which is on the coal face side of the longwall conveyor means 2, and into which the driving wheels 4 of the winch motors 7 of cutting heads 15 engage. Control lines and also lines for spraying the cutting drum. and.

lines for actuating the slewing gear 24 of support arms 8 are led through a shoulder 35 tion unit 13. At the end of the enerav distribut is a special gearing chamber 36 Figure 7), in which a spur gear wheel 37 is mounted which engages with the gear chains 17 gear boxes 16 and alsc provides the ceared t he re Pli/IMWI both f luid pressure oJ.-" the drum of the shoulder sc-e -=1s- rotatal---, ,o' f b,,,- t h -13 between both cutting drums 9.

T he cutting heads 15 in all examples have a lateral recess 38 (see Figure 1), which extends over the entire height and narrows at the front end of the cutting head 15. In this recess 38 emerge the bores 27 and 28 which serve to accept the swivel shaft 21 or the winch motor 7. Besides the support arm 8, which lies inside this recess 38 both with a coal-facesided arrangement and also a goaf-sided arrangement, and is therefore completely inside the front-ended profile of the machine body, the housing 5 which accepts the driving wheel 4 of the winch motor 77 can be fixed in this area, immediately behind the support arm 8 (Figure 4), if the rack 3 is arranged on the coal face side of the longwall conveyor - does not means 2. Here it is in a place in which it increase the overall width of the machine body and is situated exactly above the coal face-sided rack 3 when a cutter-loader 1, which can be driven cbove the longwall conve,,,or means 2, is in use.

If all three bores 26, 27 and 28 are arranged inside the horizontal plane of symmetry of the cutting head 15, the cutting head 15 can not only be fixed at both ends -he machine body, but also can be fitted with a coalface-sided or goaf- sided support arm 8, as sho..,n In Figure 4.

insteand C 1 the swivell device 2 whi -14 examples of Figures 1, 3 and 4 is accommodated inside the swivel shaft bore 22, the cutter-loader 1 can also be equipped with the device which is illustrated in Figures 5 and 6. As Figure 5 in particular shows, this swivel device 24 is situated inside the gear box 19 and is composed of two bilaterally actuatable adjusting cylinders 39, whose piston 40 is toothed between the two front faces of the piston. This toothing 41 engages with a spur gear wheel 42, which is mounted inside the gear box 19 so as to rotate about the axis of the swIvel shaft 21 and is connected to the swivel shaft 21 via coupling toothing 43. The pistons 40 adjusting cylinders 39 are a2tu:ted directions and therefore act in the same rotation on the swivel shaft 21 via the 42 and keep the support arm 8 in its set k of the two in opposite direction of spur gear wheel position.

Pli/M511, -is-

Claims

1. A drum cutter-loader with a machine body which is composed of individual structural elements and with cutting drums which are mounted so as to be adjustable in height at both ends of the machine on swivellable support arms and whose driving motors are arranged inside the machine body together with two winch motors at right angles to the direction of travel of the machine and are connected together by gearing by a gear chain which is in a housing chamber, the cutting heads at the ends of the machine body having bores which extend over their entire width and are parallel to each other, of which one accepts the drum motor another the winch motor and a third the swivelling shaft 0.97 1_ I- he support armi.

2. A drum cutter-loader according to Claim 1, wherein both cutting heads are provided on 'both sides with detachablv arranced gear boxes, of which the coal-face sided common gear box produces a geared communication between the two drum motors, whilst the gear boxe,, which can be fixed on the goaf side of both cutting- heads produce a geared communication between the drum motor of the cutting headA and the gearing element which is arranged centrailv to the swivelling shaft and is connected, 1 g 1 _ earing to the gear. chain of the sup.pcr-, -j:- a rm.

3. A drum cutter-loader as claimed in Claim 1 or Claim 2, wherein the axes of all said bores are situated inside the horizontal plane of symmetry of the cutting head and emerge in a lateral cavity extending over on the support arm side.

4. A drum cutter-loader as claimed in any of Claims 1 to 3, wherein the swivel shaft bore and the bore of the cutting head which accepts the winch motor have the same diameters.

5. A drum cutter-loader as claimed in any one of Claims 1 to 3, wherein the swivel shaft of the support arm, and the winch motor, are arranged isoaxially to each other in a common cutting head bore, the swivel shaft enclosing in its central bore a rotatably mounted bush, which engages with the gear chain of the support arm on the one hand, and projecting from the cutting head bore, engages in the goaf-sided gear box on the other, and is connected by gearing to its gear chain, and the bush also accepting the winch motor in its bore.

6. A drum cutter-loader as claimed in Claim 5,'vherein the winch motor is t the supporlt-armsided end of rotatably supported inside the bush.

7. A drum cutter-loader as claimed in anv one of' Claims 1 to 6, wherein the goaf-sided gear box equipped both underneath and above the gear- chal is w -- h 16- p a bilaterally actuatable pressure cylinder which points in the longitudinal direction of the machine, and whose piston has a toothing between its two front surfaces which meshes with toothing of the swivel shaft of the drum suport arm.

8. A drum cutter-loader substantially as herein and shown in any of the forms illustrated in any one or more of the accompanying Figures of the drawing described S.

MJ/MW p Published 1990 at The Patent Office. Stale House. 6e 71 High Holborn London WC1R4TP Further copies maybe obtained froin The Patent Office Sales Branch. S Ma77; Cray- Ken K t Cen 1'87 a rR5 3Rr Printed ty M,,Iltlplex techniqjes ltd S Ma-%' Cray en -