Abstract: The subject matter of the present invention relates to a plow guide for a chain-pulled plow for use in underground mining operations, with plow guide troughs 20 and 50 having multiple parts and being connectable to one another by means of coupling elements so as to be tension-proof and angularly movable. Each plow guide trough has a center piece 21 and 51 with superposed chain guide channels 10C, 10B, 10D, to both sides of which center piece an end piece, 22,23 and 52,53 is joined by welding, which end piece is a single-piece casting with superposed chain channel sections that are separated by a sliding spacer piece that is cast on. To make available a high-performance Gleithobel system with a high tool life, cast-on holding pockets 24,25 and 54, 55—which are open on the working face side—for toggle connections with toggles 1 as coupling organs are disposed on end pieces 22,23 and 52, 53. (FIG.

Abstract: A plough guide trough for plough guides of chain-drawn coal ploughs, comprising two superposed chain guide ducts (13,14) separated by an integrally cast sliding spacer member, with a top guide strip (17), a bottom guide beam (18) and a bottom slideway (16) for guiding the plough, wherein the top chain guide duct (14) is covered by a front wall (12) comprising the guide strip (17) and merging into the guide beam (18) and a slot lead-through (23) for a plough guiding hook or plough knife is formed between the guide beam (18) and the slideway (16), also comprising pockets (19,20) in the front wall (12) for receiving toggle coupling means for neighbouring plough guide troughs, wherein the front wall (12), the guide strips (17), the guide beam (18), the pockets (19,20) and a back wall (15) comprising the slideway (16) form a one-piece casting extending over the length of the plough guide trough (10,10A).

Abstract: Toggle retainers are disclosed for toggle connection assemblies of conveyor pans of a chain scraper conveyor or guide troughs of a mining machine guide used in underground mining operations. The toggle retainers feature laterally open toggle pockets into which toggles can be readily inserted. The toggles have toggle heads that are connected in one piece with one another, with at least one of the toggle heads having a bolt tongue. A toggle retainer can be affixed to one of the toggle pockets by extending the retainer under one or more wall projections. The toggle retainer is designed so as to have multiple parts, with a bolt element, in the assembled state, extending over the bolt tongue and under the wall projections. To ensure a secure placement of the toggle in the toggle pockets, a filler element can be form-fittingly inserted between the bolt element and the back wall of the toggle pocket and connected to the bolt element via a screw joint.

Abstract: A mining machine for underground mining is disclosed, particularly an extraction or coal plough. When in use, the mining machine is guided along a machine guide, said machine guide including a guide rail and a guide pawl. The guide pawl engaging around said guide rail from above wherein a guide piece is disposed between said guide pawl and said guide rail. The guide piece is releasably attached or attachable to said guide pawl and is sliding along said guide rail. According to the invention, said guide pawl has at least one support means whereassaid guide piece in its installation position is supported on said support means. Further, the guide piece with said guide pawl is fixed by means of a locking mechanism in the longitudinal direction of said guide rail.

Abstract: A bit holder for a ploughing bit, particularly a bottom bit of a coal plough, includes an insert pocket 12 which is open at the top side 11 for receiving and supporting a bit stem of the ploughing bit and which pocket 12 is bounded on its edges by two lateral supporting walls 20, 30, a front supporting wall 13 and a rear supporting wall 14 with the rear supporting wall 14 projecting above the front supporting wall 13. In order to minimise the wear effect on the contact surfaces between bit stem and bit holder, the lateral supporting wall 20 facing away from the working face when the plough is in use projects above the front supporting wall 13 and the other lateral supporting wall 30 and forms an extended lateral support for the bit stem with respect to the other supporting wall 30.

Abstract: Toggles are disclosed for toggle connections of conveyor pans of a chain scraper conveyor or conveyor troughs of a mining machine guide. In providing a toggle and a toggle connection, with which high axial forces can be transmitted while, at the same time, maintaining high angular mobility of the pans and troughs, shoulder areas of the toggle are designed so as to be spherical. Because of the spherical design of the shoulder areas, the vertical mobility of adjoining conveyor pans is improved while at the same time the transmission of axial tensile forces to the toggle heads is optimized.

Abstract: Chain guide arrangement for a mining machine, in particular for an extraction plough. The chain guide arrangement comprises a first chain passage for a load strand and a second chain passage for a return strand of a drive chain of the mining machine. At the end areas of the chain passages there are provided a drive station and a return station for the drive chain. At least at one of the chain passages a chain guide for the load strand and/or for the return strand of the drive chain is provided in a transition area to the drive station/s and/or the return station. According to the invention, the chain guide comprises a retaining pocket being open towards the drive chain and at an end face thereof being bounded by a hinge pin arranged to be transverse to a direction of movement of the chain. The chain guide further comprises a hold-down device comprising a pin seating on at least its one end face which pin seating matches with the hinge pin and is open on one side, and a locking arrangement.

Abstract: A coal plow cutter with a cutter foot that forms a cutter shank and head that has at least one coal face cutting edge that in turn includes at least one pin that functions as a cutting body, with the pin made of a highly wear-resistant material and being anchored in a recess in the cutter head.

Abstract: A mining machine for underground mining is disclosed, particularly an extraction or coal plough. When in use, the mining machine is guided along a machine guide, said machine guide including a guide rail and a guide pawl. The guide pawl engaging around said guide rail from above wherein a guide piece is disposed between said guide pawl and said guide rail. The guide piece is releasably attached or attachable to said guide pawl and is sliding along said guide rail. According to the invention, said guide pawl has at least one support means whereassaid guide piece in its installation position is supported on said support means. Further, the guide piece with said guide pawl is fixed by means of a locking mechanism in the longitudinal direction of said guide rail.

Abstract: Chain guide arrangement for a mining machine, in particular for an extraction plough. The chain guide arrangement comprises a first chain passage for a load strand and a second chain passage for a return strand of a drive chain of the mining machine. At the end areas of the chain passages there are provided a drive station and a return station for the drive chain. At least at one of the chain passages a chain guide for the load strand and/or for the return strand of the drive chain is provided in a transition area to the drive station/s and/or the return station. According to the invention, the chain guide comprises a retaining pocket being open towards the drive chain and at an end face thereof being bounded by a hinge pin arranged to be transverse to a direction of movement of the chain. The chain guide further comprises a hold-down device comprising a pin seating on at least its one end face which pin seating matches with the hinge pin and is open on one side, and a locking arrangement.

Abstract: The invention relates to a bit holder for a ploughing bit of a coal or extraction plough, with an insert pocket open on the top side for receiving a bit shank formed on the ploughing bit. The pocket is bounded by two lateral supporting walls, a front and a rear supporting wall, whereby the rear supporting wall has an elevated section projecting over the adjoining, lateral supporting walls. The rear supporting wall forming a bit support for the ploughing bit slopes down to its outer regions. In order to allow a good support for an inserted bit and easy and fast installation of the bit the front face of the rear supporting wall is fitted on the outer regions with guiding surfaces sloping down inwards to the insert pocket as an installation aid for the ploughing bit.

Abstract: A plough for underground mining, more specifically a coal plough, which plough has a plough body that is guided along a plough guide, whereas said plough body has at least one foot piece which receives a sliding skid. The sliding skid has at least one contact surface formed on its underside, which sliding surface slides on a rail of said plough guide when said sliding skid is in its operating position. According to the invention, said sliding skid has at least one wear inlay on an underside of said sliding skid, which wear inlay is preferably arranged in the area of the highest load. The sliding skid that is provided with the wear inlay according to the invention can withstand the high mechanical loads for a longer period of use than hitherto-known runners.

Abstract: A bit holder for a ploughing bit, particularly a bottom bit of a coal plough, includes an insert pocket 12 which is open at the top side 11 for receiving and supporting a bit stem of the ploughing bit and which pocket 12 is bounded on its edges by two lateral supporting walls 20, 30, a front supporting wall 13 and a rear supporting wall 14 with the rear supporting wall 14 projecting above the front supporting wall 13. In order to minimise the wear effect on the contact surfaces between bit stem and bit holder, the lateral supporting wall 20 facing away from the working face when the plough is in use projects above the front supporting wall 13 and the other lateral supporting wall 30 and forms an extended lateral support for the bit stem with respect to the other supporting wall 30.

Abstract: The subject matter of the present invention relates to toggle retainers for toggle connections of conveyor pans of a chain scraper conveyor or guide troughs of a mining machine guide used in underground mining operations, with laterally open toggle pockets into which toggles 50 can be inserted with play, which toggles have toggle heads 51 that are connected in one piece with one another, with at least one of said toggle heads having a bolt tongue 54. Toggle retainer 10 can be affixed to one of toggle pockets 2 by extending under wall projections 8 and is designed so as to have multiple parts, with a bolt element 20, in the assembled state, extending over bolt tongue 54 and under wall projections 8. To ensure a secure placement of the toggle in the toggle pockets, a filler element 30 can be form-fittingly inserted between bolt element 20 and back wall 9 of the toggle pocket and connected to bolt element 20 via a screw joint 40 (FIG. 1).

Abstract: The subject matter of the present invention relates to a plow guide for a chain-pulled plow for use in underground mining operations, with plow guide troughs 20 and 50 having multiple parts and being connectable to one another by means of coupling elements so as to be tension-proof and angularly movable. Each plow guide trough has a center piece 21 and 51 with superposed chain guide channels 10C, 10B, 10D, to both sides of which center piece an end piece, 22,23 and 52,53 is joined by welding, which end piece is a single-piece casting with superposed chain channel sections that are separated by a sliding spacer piece that is cast on. To make available a high-performance Gleithobel system with a high tool life, cast-on holding pockets 24,25 and 54, 55—which are open on the working face side—for toggle connections with toggles 1 as coupling organs are disposed on end pieces 22,23 and 52, 53. (FIG.

Abstract: The subject matter of the present invention relates to mining operations and, in particular, to toggles for toggle connections of conveyor pans of a chain scraper conveyor or for conveyor troughs of a mining machine guide, in particular a plow guide. Toggles 10 have two toggle heads 13 which are connected in one piece with each other via a shaft 12, the width of which is tapered, on which toggle heads, on the side facing shaft 12, shoulder areas 11 that are oriented so as to slope downwardly toward shaft 12 are disposed. To make available a toggle and a toggle connection, with which high axial forces can be transmitted while, at the same time, maintaining a high angular mobility of the pans and troughs, shoulder areas 11 of the toggle are designed so as to be spherical, in particular spherically rounded.

Abstract: A plough guide for underground mining ploughs, with angle plates (5), whose extended arm (8) is fastened on the working face side to the conveyor pan (3) of a chain scraper conveyor and whose base arm (7) towards the face, supported on the ground (6), forms a sliding track for the plough, with upper and lower chain channel slides (11, 12) for the plough chains separated by distance pieces (9) fastened preferably at a distance from each other on extended arms of the angle plates, with a cover (15) closing the chain channels (12, 11) to the working face side and which can be pivoted towards the face, having at least one abutment part (21), which can be fixed on the plough guide and released, and with a guide rail (18) arranged on the plough guide at a distance from the sliding plough track. The abutment part (21) of the cover (15) is clamped between the angle plate (5) and a securing part (30) at a distance from the cover (15) screwed onto the angle plate (5).

Abstract: A plough guide for underground mining ploughs, with angle plates (5), whose extended arm (8) is fastened on the working face side to the conveyor pan (3) of a chain scraper conveyor and whose base arm (7) towards the face, supported on the ground (6), forms a sliding track for the plough, with upper and lower chain channel slides (11, 12) for the plough chains separated by distance pieces (9) fastened preferably at a distance from each other on extended arms of the angle plates, with a cover (15) closing the chain channels (12, 11) to the working face side and which can be pivoted towards the face, having at least one abutment part (21), which can be fixed on the plough guide and released, and with a guide rail (18) arranged on the plough guide at a distance from the sliding plough track. The abutment part (21) of the cover (15) is clamped between the angle plate (5) and a securing part (30) at a distance from the cover (15) screwed onto the angle plate (5).

Abstract: A plough guide which is built onto the runs of channelling of a scraper chain conveyor, has angle plates which form a slide path for the plough and which are connected by their upwardly extending sides to the runs of channelling. Sliding spacers are provided behind a covering between an upper chain channel and a lower chain channel. Covering hoods which form the covering for the channels are each pivotably mounted to a lower guide beam. The hoods can be swung over on the pivot joints towards the face in order to open the upper chain channel. The spacers are connected to the angle plates via fitting plates which are rigidly connected thereto and which extend upwards beyond the spacers. The fitting plates are provided with centering pins which engage centering apertures in the angle plates. The fitting plates can be connected to the sliding spacers and/or the angle plates by welding.