Classifications

• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21C—MINING OR QUARRYING
  • E21C29/00—Propulsion of machines for slitting or completely freeing the mineral from the seam
  • E21C29/02—Propulsion of machines for slitting or completely freeing the mineral from the seam by means on the machine exerting a thrust against fixed supports

Definitions

• the invention relates to a guide shoe for a shearer loader, in particular for a shearer loader drive assembly, with at least one base wall, with a base-wall-side guide lug for reaching under a drive block of a drive assembly and with a guide surface for engaging behind the drive block.
• the invention also relates to wear inserts for corresponding guide shoes for shearer or shearer loader drive assemblies.
• both the wear of the drive gear of the shearer loader drive assembly and the guide shoe are relatively high and it is required at regular intervals, the guide shoes and / or Replacing drive gear.
• the drive gear is bolted to a transmission gear.
• the gear can, after disassembly of a cover of a housing base plate of the drive assembly opposite lid, be dismantled together with a bearing tube and the bearings for the drive gear.
• the guide shoe comprises a specially designed hook attachment, or the like, a lower guide rail of a rack. both under and covered.
• the installation effort and retooling is relatively high in this solution, since when repairing the drive gear from a drive gear, gear, bearings and bearing shaft assembly must be removed.
• the hook attachment which under- and underlines the guide strip on the headstock with a V-shaped section, is interchangeably bolted to the housing base plate.
• a guide shoe which can be relatively easily solved as a replacement part of the drive assembly, since only a strong bearing pin inserted into a bearing axis for the drive gear for anchoring the guide shoe on the drive assembly becomes.
• the guide shoe has a base wall and a counter wall, which are penetrated by the bearing bolt in the assembled state.
• the guide shoe can be removed after disassembly of the bearing pin down from the drive assembly, while the drive assembly is still attached to the machine body of the shearer. For assembly / disassembly of the guide shoe, it is only necessary to remove a rack pole.
• the object of the invention is to provide a guide shoe for a shearer or a Walzenladerantriebsbauenstein that allows even shorter downtime for wear-related repairs to the shearer loader drive assembly and its susceptibility to wear is reduced by design.
• a guide shoe according to the invention in that the guide projection and the guide surface are formed on wear inserts that are movable and preferably also interchangeable fastened or attached to the guide shoe. Due to the movable arrangement of the wear inserts, the running behavior of the guide lugs and guide surfaces on the drive block compared to the known solutions can be significantly improved again.
• the guide shoe itself pivotable about an axis which is substantially horizontal or coincident with the bearing axis of the drive gear on the roller loader drive assembly or the machine body
• the movable, all guide areas in particular Adjusting the guide lug and the guide surface wear inserts even better adapt to an angled course of the drive block of the drive train assembly, so that even a large distance between two guide shoes with which a shearer roller is guided on the drive train, not blocking or clamping between the guide shoe and drive assembly and thus increased wear of the guide portions of the guide shoe leads.
• the wear inserts can adapt to bends between two consecutive racks of a truss. It is particularly advantageous if the movable wear inserts, which have at least the guide projection and the guide surface, and thus the largest wear on the guide shoe underlying partial surfaces, are interchangeable, as this allows preferably only these "wear surfaces" of other, especially more wear-resistant material the remaining areas of the guide shoe need to be made. In addition, only the wear inserts must be replaced during maintenance or repair, while the guide shoe may otherwise remain in its mounting position. The downtime can already be significantly reduced by this measure.
• the combination of interchangeable and movable wear inserts on the guide shoe forms the particularly preferred embodiment according to the invention.
• the guide shoe in addition to the base wall with the base-wall-side guide lug for grasping a drive block assembly on the base wall opposite and rigidly connected to this counter wall, on the side of the guide surface is arranged to engage behind the drive assembly, preferably in the base wall and the counter wall Through openings for engagement and penetration of a bearing pin for pivotally supporting and supporting the guide shoe are formed on the shearer loader drive assembly.
• the wear inserts are removably received down in the guide shoe, so that at a maintenance interval, the replacement of the wear inserts can be made not only in the area of the long-distance transition, but in principle at any position along the strut or the triebstocks. Again, it is sufficient in turn to dismantle a rack of the drive train arrangement at short notice, and then remove the wear inserts down.
• the wear inserts used in the recordings are pivotable about a pivot axis, wherein preferably the pivot axis is aligned perpendicular to the axis of the bearing pin, with which in the particularly preferred embodiment of the guide shoe on the roller loader drive assembly is pivotally mounted and supported.
• each guide shoe has a length of, for example, about one meter, and thus a length corresponding to about half to one third of a rack pole, it is particularly advantageous if each guide shoe has two spaced-apart receivers for one wear insert in each case, so that two movable and spaced apart wear inserts can be accommodated in each guide shoe. The distance between the two movable wear inserts can then still be about 65% to 85% of the total length of the guide shoe.
• the formed for the wear inserts on both sides of the through openings to allow the smoothest possible running of the guide shoes and thus the shearer loader on the drive train assembly and also to burden both wear inserts substantially uniformly depending on the direction of travel of the shearer.
• a pivot pin By forming a pivot pin on the wear inserts, the mobility of the wear inserts can be achieved in the assembled state in the guide shoes in a relatively simple manner. It is particularly advantageous if the base wall and the opposite wall of the guide shoe are connected to one another via two transverse webs arranged at a distance from each other, wherein each transverse web has a bearing receptacle for the pivot pin of a wear insert.
• pivotal support of the wear insert can be achieved.
• the wear insert receives an approximately J-shaped cross-section overall, with the middle leg of the pivot pin being formed on one of the middle limbs, preferably on the limb directly adjoining the outer, the guide surface.
• the inner sides of the legs of the wear insert are hardened, in particular flame-hardened or provided with an armored or welded-on wear layer.
• the rear wall of the base-wall-side leg and the back of the counter-wall-side leg are advantageously formed curved arcuate.
• the recordings for the wear inserts a trough-shaped depression in the base wall and a trough-shaped depression in the opposite wall, which are formed concentrically to the pivot axis to support the wear inserts safely in the recordings and next to the exchange or the removal down only the pivoting to allow as a degree of freedom.
• the wear inserts may be associated with pivot limiting means which preferably limit the maximum pivotal movement of each wear insert to ⁇ 10 °, preferably ⁇ 6 °.
• the wear inserts can be arranged in both receptacles Schwenkbegrenzungsangn, which are advantageously welded to the underside of the transverse webs.
• they may have two wedge-shaped diverging wedge surfaces on one side, which form contact surfaces for the end faces of the wear inserts in the assembled state, depending on the pivoting either the one wedge surface or the other wedge surface forms the stop ,
• each wear insert should be interchangeable fixed by means of a suitable securing means in the receptacle.
• the securing means may cooperate positively with the pivot pin, for which purpose preferably the pivot pin on the circumference has a circumferential groove into which the securing means engages positively.
• the securing means can then be formed, for example, by two U-shaped clamps, by one screw or by two screws, which engage in the groove with their shank or tip and thus prevent a vertical removal of the wear inserts from the receptacles, but at the same time produce a pivoting movement. allow movement.
• the securing means could also form the pivot limiting means at the same time.
• a longitudinal groove is formed in the rear wall of the base-wall-side leg of the wear insert.
• a recess associated with each receptacle for a wear insert is expediently formed in the base wall into which a retaining piece engaging in the longitudinal groove is inserted or used as securing means for the wear insert.
• the longitudinal groove is preferably formed in the arcuately curved back or rear wall of the corresponding leg of the wear insert. Again, the holding piece could also form or support the Schwenkbegrenzungsstoff.
• Each holding piece may expediently have a base plate with through-holes for fastening screws and a locking tongue, which in the assembled state engages in the longitudinal groove on the wear insert and assumes the locking in the vertical direction transversely to the pivoting direction, but allows pivoting. Laterally of the recess can be formed in the base wall of the guide shoe Einschraublöcher for securing the retaining piece. The locking of the holding piece can then be done by means of strong screws.
• the opposite legs of the wear insert in particular those legs which rest in the mounted state at the front and the back of the drive block, are provided at their edge regions with bevels, wherein the angle of the bevel is preferably about 10 °.
• the corresponding chamfers can additionally improve the running behavior of the wear inserts and thus of the guide shoes, since they can cause an advance direction of the movable wear inserts on the alignment of the drive block.
• wear inserts for guide shoes for shearer loaders or shearer loader drive assemblies which are characterized in that they have a pivot pin, with which they are mounted in a bearing receptacle on the guide rail. replaceable shoe and movable in the assembled state, in particular pivotable about a vertical pivot axis are used.
• the wear inserts according to the invention can, as described in detail above, be formed.
• the mobility of the wear inserts preferably only temporarily or under certain conditions of use or operating, be prevented or prevented.
• the setting of the wear inserts can be done by clamping by means of securing means, by means of inserts or by attachment of spacers.
• the determination of the pivoting mobility can also be achieved by modifying the securing means by using securing means which not only retain the wear inserts replaceably in the receptacle but at the same time prevent the pivoting mobility.
• clamping bars e.g. instead of the Schenkbegrenzungsangn be arranged, especially welded to the underside of the transverse webs or be detachably screwed, which preferably prevent the pivoting movement by positive engagement with the wear inserts.
• a guide shoe for a shearer loader in particular for a shearer loader drive assembly, with at least one base wall, with a base-wall-side guide lug for engaging under a drive block of a drive block assembly and with a guide surface for engaging behind the drive block by the guide lug and the guide surface are formed on wear inserts that are interchangeable attached to the guide shoe or fastened, but no pivoting mobility exists or the pivoting mobility is fixed or prevented.
• FIG. 1 is a schematic side view of a roller loader with two guided by means of inventive guide shoes on a rack drive Walzenladerantriebsbau- groups, -
• FIG. 2 schematically shows a horizontal section through a guide shoe according to the invention for clarifying the maximum possibility of pivoting the wear inserts
• FIG. 3 shows in perspective a guide shoe according to the invention with two built-in, movable wear inserts
• FIG. 4 is a view of the underside of the guide shoe in Fig. 3, partially broken away, -
• Fig. 5 is a sectional view taken along V-V in Fig. 4;
• FIG. 6 is a view of a guide shoe of FIG. 3 with disassembled wear inserts, partially broken,
• FIG. 7 shows in perspective a wear insert which can be inserted into the guide shoes according to FIGS. 3 to 6;
• FIG. 8 shows the wear insert from FIG. 7 in side view
• FIG. 9 is a view of the underside of the wear insert of FIG. 7, partially broken away, -
• FIG. 10 shows a guide shoe according to a second embodiment in horizontal section through both bearing receptacles for the pivot pins.
• FIG. 11 is a sectional view taken along XI-XI in Fig. 10;
• FIG. 12 shows the wear insert used in the guide shoe according to FIG. 10 in side view;
• FIG. 12 shows the wear insert used in the guide shoe according to FIG. 10 in side view;
• FIG. 13 shows a third exemplary embodiment of a guide shoe in a vertical section through one of the bearing receptacles for the wear insert
• FIG. 14 shows a fourth exemplary embodiment of a guide shoe according to the invention in vertical section through the bearing receptacle for a wear insert
• FIG. 15 shows a fifth exemplary embodiment of a guide shoe according to the invention in vertical section through a bearing receptacle for a wear insert
• FIG. 16 shows a guide shoe according to the invention with two built-in wear inserts similar to FIG. 4, but the pivoting mobility is blocked by means of clamping strips;
• FIG. 17 shows a side view of the transverse side of the guide shoe according to FIG. 16, partially broken away.
• FIG. 18 is a side view on the longitudinal side of the guide shoe of FIG. 16, partially broken away.
• Fig. 1 shows schematically simplified a shearer loader 1, the roller loader body 2 engages over an underground underground conveyor, not shown, like a portal.
• pivot arms 6 are articulated for both directions of travel of the shearer loader, to which the not shown and equipped with editing tools, rotatable tool rolls are mounted (not shown).
• two roller loader drive assemblies 10 are mounted on the roller loader body 2 in such a way that they possibly complete as a drive assembly can be dismantled.
• the Walzenladerantriebsbau phenomenon 10 each have a transmission 4 with a driven-side gear, with which the drive energy of a drive motor, not shown, on the drive gears 3 of both drive modules 10 Ü transferred.
• a rack assembly comprising a plurality of serially arranged racks 7 as a rack, the gaps of which are adapted to cause the teeth 5 of the drive gear 3 can engage from above in the gaps to achieve by combing the drive gear 3 with the racks 7, a movement of the shearer roller 1.
• the present invention relates to the structure and design of guide shoes 50, with which the drive assembly 10 is so offset side guided on the racks 7, that at any time is ensured that the teeth 5 of the drive gears 3 can engage in the gaps in the racks 7, and prevents at any time that the teeth of the drive gear 3 can get out of engagement with the corresponding tooth gaps in the rack 7.
• the guide shoes 50 are pivotally mounted and supported on the drive assembly 10 about a coincident with the axis of rotation of the drive gears 3 axis.
• the bearing and support takes place here via a bearing pin 60, which is inserted through through openings on the guide shoes 50 and is anchored on both sides outside the guide shoe 50 on the drive assembly 10 to mount the guide shoe 50 in total by inserting / pulling out of the bolt 60 or disassemble can.
• the plug-in or bearing pin 60 passes through the inner bore of a bearing tube 17 which can be seen in the left-hand roller loader drive assembly 10, on whose outer circumference the drive gearwheel 3 is rotatably supported.
• the guide shoe 50 is supported in several zones on the outer surfaces of the racks 7 and the drive block of the drive train arrangement to ensure safe guidance of the shearer 1 and an optimal interaction of the drive gear 3 with the rack 7 ,
• the Verschraißein algorithms can therefore be formed on the one hand from wear-resistant material than the guide shoes 50, and on the other hand, only the wear inserts must be dismantled and replaced with low downtime of the shearer or the underground mining device by new wear inserts. Both the roll derantriebsbauè 10 and the associated guide shoe 50 may remain in their mounting position for this purpose.
• Fig. 2 shows again schematically two serially arranged racks 7 with the leading to the racks 7 guide shoe 50.
• Fig. 2 is particularly clearly seen that the direct contact between the guide shoe 50 and the racks 7 only in the region of the two wear inserts 70 exists.
• Fig. 2 shows at the same time that the two wear inserts 70 can be pivoted perpendicular to the longitudinal extent of the racks 7 by an angle ⁇ in one direction and in the other direction, said angle ⁇ is preferably ⁇ 5 °, in particular at most about 3 ° , Since the total length of a guide shoe 50 is e.g.
• the guide shoe 50 in the region of a transition of a rack 7 in the subsequent rack 7 can optimally adapt to bends of the longwall conveyor or bends of the racks 7 and Thus, the wear, which can occur in particular in the inevitably occurring bends between adjacent channel shots and racks 7, is reduced.
• the guide shoe 50 which is integrally formed as a casting, but preferably consists of several parts welded together several parts, has a relatively strong executed base wall 51 and one of these opposite wall 53, wherein the base wall 51 and the opposing wall 53 via strong transverse webs 56 rigid connected to each other.
• the base wall 51 which in the assembled state of the guide shoe 50, as shown in FIGS. 1 and 2, facing the shearer 1 and the excavation, extends vertically over the entire height of the guide shoe 50 and in the assembled state down over the racks ( Fig. 1) addition.
• Both the base wall 51 and the counter wall 53 comprise a wall section 51A or 53A, which serves as a bearing leg. extends over the transverse webs 56 upwards and through openings 58, 59, through which the bolt (60, Fig. 1) can be inserted for supporting the guide shoe 50 on the shearer loader drive assembly.
• receptacles 65 are formed between the inner surfaces of the base wall 51, the transverse webs 56 and the opposite wall, in which the Schllustein centers 70 pivotally about a pivot axis 66 which is perpendicular to the bearing axis 63 for the mounting bolt 60 (Fig. 1) is aligned.
• Both the receptacles 65 in the guide shoes 50 and the other surfaces of the base wall 51 and the opposing wall 53 are formed and arranged so that they can not come into contact with the racks of the drive assembly in the operating state, ie in particular during movements of the shearer.
• the wear inserts 70 have a total of four legs, namely two inner legs 71, 73 and two outer legs 72, 74, all of which abut in operation insert on the drive train assembly and are angled to each other according to the configuration of the racks or the drive block.
• the individual legs 71, 72, 73 and 74 are each at right angles to one another and one outer leg 72 forms a guide projection which engages under the drive block, while the other outer leg 74 forms a guide surface with its inner side , which engages behind the racks of the drive arrangement.
• FIGS. 7 to 9 a wear insert 70 used in the exemplary embodiment according to FIGS. 3 to 9 is shown in detail.
• the mounting upper, middle leg 73 of the wear insert 70 has at its top and rear sides integrally formed pivot pin 75 and at the left in Figs. 7 and 8 end at right angles into a relatively short outer leg 74, which itself approximately only over half the height of the opposite middle leg 71 extends.
• the hardening can in particular consist of a flame hardening.
• all the legs 71, 72, 73, 74 are each in the edge region with an over the length or height of the legs extending and thus in the direction of movement be provided leading chamfer 78, wherein these chamfers 78 relative to the inner surfaces of the legs 71, 72, 73, 74 are each angled by about 10 °.
• the replacement or replacement parts forming wear inserts 70 are preferably removable downwards or mountable from below into the receptacles 65 below both transverse webs 56 used.
• the bearing receivers 67 for the pivot pins on the wear inserts preferably extend through the transverse webs 56, as can be seen particularly well from FIGS. 5 and 6.
• the surfaces of the base wall 51 facing the receptacles 65 and the opposing wall 53 are provided with trough-shaped recesses 68 and 69 which are in the form of arcuate recesses and which form the arcuately curved outer surfaces (71 1 , 74 ', 76') of the legs the wear inserts interact.
• the recesses 68, 69 are concentric about the center of the bearing mounts 67 and thus concentric with the pivot axes 66 executed.
• each holding lug 91 comprises a relatively long bolt tongue 93 and two through-holes 94, which in the assembled state are grasped by the bolts of the fastening screws 92.
• the front side of the locking tongue 93 in turn preferably has chamfers 95 on both sides, in order to limit the Verschwen- kungsspiel for the wear inserts 70 in the receptacles 65.
• a further limitation of the movement play for the wear inserts 70 is achieved by means of pivoting limiting strips 85, which are welded laterally to the underside of the transverse webs 56 of both receptacles 65 and which are provided on the side facing the receptacles 65 and the wear inserts used wedge surfaces 86 wedge-shaped diverging, wherein each wedge surface 86 is angled 3 ° so that the maximum range of motion for each wear insert is substantially limited to 6 °.
• the assembly or disassembly of the wear inserts 70 can take place in that a rack pole or rack is removed and then the wear inserts 70 are taken down from the guide shoes 50 without them from the drive assembly (10, Fig 1) must be solved.
• the fixing screws 92 After loosening the fixing screws 92, the locking tongues 93 of the holding pieces 91 can be pulled out of the recesses 80, this withdrawal could be supported, for example by loosening the central screw 96 and attaching a disassembly tool or a compressed air hose.
• the wear inserts 70 can be pulled down from the bearing receivers 65, since the locking tongues 93 form the only locking elements for the wear inserts 70 by in the longitudinal groove 77 on the The back of the middle leg 71 of the wear inserts 70 border.
• the securing of the wear inserts 70 by means of the locking tongues 93 engaging in the longitudinal groove 77 at the same time ensures good pivoting mobility of the wear inserts 70 in the guide shoes 50.
• FIGS. 10 to 12 show an alternative embodiment of a guide shoe 150 with a wear insert 170.
• the guide shoe 150 again has a strong base wall 151 and a thinner mating wall 153, each side of a central recess 164 for the passage of the drive gear and Engaging the teeth of the drive gear in a drive assembly by means of transverse webs 156 are connected.
• the two receptacles 165 are formed for the mutually spaced and movably arranged in the receptacles 165 wear inserts 170 and for the pivotal recording both transverse webs 156 are provided with bearing receivers 167 for strong pivot pin 175 on the wear inserts.
• the pivot pin 175 is circumferentially provided with a groove 179, in which, for example, clip legs 191 of a securing clip which can be mounted on the transverse sides of the guide shoe 150 are gripped as securing means 190.
• the two legs 191 can also be formed by the bolt shanks suitable fastening screws, which are so deeply screwed from the transverse sides, that they essentially form-fit with their shanks under admission of sufficient movement play in the circumferential groove 179 on the pivot pin 175.
• the two outer legs 172 and 174 and the upper middle leg 173 of the wear insert can be carried out as in the previous embodiment and in the assembled state engages under the short outer leg 172 a drive train assembly, while the other outer leg 174 behind a drive assembly.
• the securing means do not cooperate with the vertical leg 171 opposite the engaging leg 174, it may extend with a constant cross section between the middle leg 173 and the leg 172 projecting at right angles thereto, again allowing the two opposing legs 171 to enable pivoting and 174 are arcuately curved on their backs.
• the guide shoe 150 has both in the region of the base wall 151 and in the region of the opposing wall 153 on the transverse sides 156 upstanding leg portion 151A and 153A, in which through openings 158 are formed to fasten the guide shoe by means of a single bearing pin on the drive assembly can.
• the third embodiment shown in Fig. 13 of a guide shoe 250 with two movable, spaced-apart and interchangeable wear inserts 270 differs primarily by the way the backup-wear inserts 270 in the receptacles 265 of the embodiment in FIGS. 10 to 12.
• the guide shoe 250, the securing means 290, although in turn cooperates with the pivot pin 275, the securing means consists Here, however, from a slices 291 which is detachably connected via a fastening screw 292 with the pivot pin 275 and o- lies beyond the pivot pin.
• the lock washer 291 has a larger diameter than the pivot pin 275 and the cross bar 256 is provided with a stepped bearing mount 267 so that the discs 291 can abut the circumferential collar of the stage and so the wear insert 270 while ensuring its pivoting in the receptacle 265th can secure.
• the wear inserts 270 have pivot pins 275 which enclose bearing receptacles 267 assigned to the receptacles 265 in the transverse webs 356.
• the securing of the wear inserts 370 takes place by means of a securing means 390, which consists of L-shaped locking plates or strips, whose longer leg 393 is screwed in a suitable manner to the base wall 351, while the right angle projecting for this shorter leg 394 in the assembled state in the receptacle 365th protrudes for the wear insert 370 and in this case a skirt 377 under grasps, which is formed on the back of the base wall 351 facing leg 371 of the wear insert 370.
• the underside of the shorter leg 394 terminates substantially flush with the underside of the leg 372, which engages under the driving stick in the installed state or operational use.
• the release of the L-shaped locking plates can in turn be carried out from the mining side, which faces in the assembled state, the vertically upstanding, longer leg 393 of the locking plate 390.
• the securing of the wear inserts 470 takes place via securing means 490, which can be anchored in the base wall 451.
• the wear insert 470 has, as in the previous embodiment on the back of the vertically extending central leg 471, a skirt 477 which engages in an approximately U-shaped locking plate 493 which is mounted between the base wall 451 and the rear wall of the leg 471 and a One- screw bushing 492, which passes through the base wall 451, is held in position. By removing the bushing 492, the U-shaped lock plate together with the wear insert 470 can be taken down from the receptacle 465 in the guide shoe 450. Also in the case of the guide shoe 450, the wear insert 470 is received by means of a pivot pin 475, which engages in a bearing receptacle 465, pivotably and exchangeably in the guide shoe 450.
• the guide shoe 550 has a relatively strong executed base wall 551 and a counter wall 553 opposite thereto, wherein the base wall 551 and the counter wall 553 are rigidly connected to each other via strong transverse webs 556.
• Both the base wall 551 and the counter wall 553 include a wall portion 551A and 553A, which projects as a bearing leg over the transverse webs 556 upwards and here unillustrated access openings, through which a bolt for supporting the guide shoe 550 can be inserted through the shearer loader drive assembly in that the guide shoe can tilt about the pin axis 563.
• receptacles 565 are formed between the inner surfaces of the base wall 551, the transverse webs 556 and the opposing wall 553, in which the wear inserts 570 are accommodated.
• the individual legs 571, 572, 573 and 574 are each perpendicular to each other and the one outer leg 572 forms a guide lug which engages under the lantern, while the other outer leg 574 with its inside a guide surface forms, which engages behind the racks of the drive assembly.
• the Schl mustein centers 570 have pivot pin 575, which at the rear of the mounting upper upper leg 573 of Wear inserts 570 are formed as integral components and engage in bearing receivers 567 in the transverse webs 556.
• the replacement or replacement parts forming wear inserts 570 can be removed downwards or mounted from below into the receptacles 565 below both transverse webs 556 used.
• the bearing receivers 567 for the pivot pins on the wear inserts 570 extend through the transverse webs 556, as is particularly apparent from Fig. 18.
• the receptacles 565 respectively facing surfaces of the base wall 551 and the counter wall 553 are provided with trough-shaped, circular arc-shaped recesses 568 and 569, which cooperate with the arcuately curved outer surfaces 572 ', 574' of the legs of the wear inserts.
• the wear inserts are secured in the receptacles 565 by means of the securing means 590 shown in Fig. 16, which have the same structure as in the embodiment of FIGS. 3 to 9, therefore on the local comments on the operation of the retaining tab 591, the locking tongue 593, the Through holes 594 and the mounting screws 592, 594 is referenced supplementary.
• the wear inserts 570 are not pivotable in the embodiment of FIGS.
• terminal strips 585 are welded to the undersides of the transverse webs 556 side of both shots, the form-fitting with a straight back 585 'abut the outer edge of the legs 573 of the wear inserts 570 , which is why the wear inserts can not move, or at least minimal.
• the terminal strips may have the same structure as the pivotal limiting strips in Fig. 6 and only be rotated by 180 ° welded to the transverse webs. The pivoting mobility could also be prevented directly with the securing means by these fit positively against the wear inserts.
• guide shoes are shown, which have a leg portion projecting beyond the base wall and the counter wall, in which through holes for a bearing bolt for the guide shoe are formed.
• Such guide shoes form the preferred zugte scope of the invention.
• the inventive concept of movable or pivotable wear inserts which form the only guide surface between the guide shoes and the drive train arrangements, can be used in all known constructions of shearer loader systems.
• the guide surface and the guide approach could also be formed in a common leg and are substantially only V-shaped angled to each other, as long as it is simultaneously ensured that they are retained as interchangeable wear inserts movable on the guide shoe.
• other mounting options and securing options as well as storage options for a pivotable recording of wear inserts in guide shoes can be seen by those skilled in the art. Under certain operating conditions, it may be advantageous not to allow the pivoting mobility of the wear inserts.

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• Engineering & Computer Science (AREA)
• Mining & Mineral Resources (AREA)
• Mechanical Engineering (AREA)
• Life Sciences & Earth Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geochemistry & Mineralogy (AREA)
• Geology (AREA)
• Component Parts Of Construction Machinery (AREA)
• Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
• Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
• Transmission Devices (AREA)
• Types And Forms Of Lifts (AREA)
• Valve-Gear Or Valve Arrangements (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)
• Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
• Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)

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