Abstract: A ploughing device for mining, with a ploughing tool having a plurality of plough bodies being interconnected by means of detachable coupling members, and with a longwall conveyor forming a plough guiding means, wherein at least one ploughing body is provided with pivotable cutter carriers. In order to have a ploughing device for mining different seam thicknesses in an efficient manner even and with low number of spare parts to be stored, the ploughing tool has three plough bodies, one forming a central ploughing body, at the end of which are connected a first and second lateral ploughing body by means of a first and second coupling members, wherein the coupling members in each case consist of a toggle bolt with toggle shaft and toggle heads being insertable on open-edged toggle pockets on the bodies.

Abstract: A mining plough for plough systems for the exploiting of minerals in inclined formations. In order to provide a mining plough and a plough system, with which coal seams, in particular seams in steep formation can be exploited economically and with high operating safety, the mining plough includes a separable plough body having two plough body basic elements each being provided with a fixture for a separate traction means and with a guide means for moving the coal plough by means of at least two traction means and for guiding the coal plough on at least two mutually spaced guide mechanisms.

Abstract: A connector device for connecting an attachment part, in particular a plough guide part, to a lateral element of a trough pan of a mining device, comprising first fittings arranged on the lateral element, comprising counter fittings arranged on the attachment part and detachably connectable to the fittings, and comprising at least one retaining piece, which in the closing position prevents detachment of the fitting and counter fitting and in the opening position permits detachment. In order to facilitate assembly and disassembly, to the retaining piece there is assigned, according to the invention, a hydraulic cylinder for moving the retaining piece between the closing and opening position.

Abstract: A chain guide for a driving chain of a winning plow or the like, the chain guide being provided with a chain guide element which is arranged in spatial proximity to the sprockets at a driving or return station and is against the chain transversely to the direction of movement of the latter, provision is made according to the invention for the chain guide element to have at least one pressure roller which can be adjusted against the chain links of the driving chain, as a result of which the wear on the chain guide element is considerably reduced.

Abstract: The invention relates to a drive station for an underground plough system, in particular a coal plough system, with a machine frame to which a plough box can be fastened, and with a wedge trough which is connected to the machine frame and is provided with a plough guide device, which has chain channels for a plough chain, and also a plough end stop on a runout section for a winning plough. In order to facilitate the repair of a winning plough, the plough end stop is formed on an attachment which can be dismantled, when the plough guide device is mounted, to produce a repair section in the longwall-gallery transition of the wedge trough. The invention also relates to a repair method in which the plough end stop is dismantled and the winning plough is moved into the repair section.

Abstract: A roof cutter holder adjustment device for a roof cutter holder arranged in a vertically adjustable manner on a plow body of a winning plow, comprising a worm wheel for interacting with a rack-like tooth system on the roof cutter holder, an input shaft for actuating the worm wheel, and comprising a head plate which has a passage for the input shaft and which can be fastened or is fastened to the plow body in a rotationally fixed manner. In order to enable the roof cutter holder adjustment device to be mounted and released in a simple manner, the head plate has at least one fastening device, to which a securing element which can be put onto the free end of the input shaft can be fastened in a rotationally fixed manner in the mounted state.

Abstract: A connector device for connecting an attachment part, in particular a plough guide part, to a lateral element of a trough pan of a mining device, comprising first fittings arranged on the lateral element, comprising counter fittings arranged on the attachment part and detachably connectable to the fittings, and comprising at least one retaining piece, which in the closing position prevents detachment of the fitting and counter fitting and in the opening position permits detachment. In order to facilitate assembly and disassembly, to the retaining piece there is assigned, according to the invention, a hydraulic cylinder for moving the retaining piece between the closing and opening position.

Abstract: The invention relates to a traction carriage for an underground mining plow, comprising a traction carriage body which can be inserted into a cavity in a plow body and which on the rear side of a guide recess 17 has a front part 11 whose ends pointing in the direction of travel form stop surfaces 12 for interacting with counterstop surfaces in the cavity of the plow body. According to the invention, a damping device 20 having a damping action in both directions of travel is integrated into the front part 11 of the traction carriage 10. In order to provide a low-maintenance damping device which allows a more favorable transmission of force between the stop surface on the traction carriage and the counterstop surface on the plow body, the coupling piece 14 can be moved relative to the stop surfaces 12 counter to the restoring force of a damping system of the damping device 20 that is arranged between the stop surfaces 12.

Abstract: The invention relates to a device for determining the cutting horizon of a mining winning system, having a movable conveyor which is composed of individual pan elements, and having at least one optical detection sensor which has a sensor head that is received in a sensor carrier and can be pressed with at least one pressure means against a coal/basement rock boundary layer. In order to improve the sensing and working reliability, over the length of the conveyor, a plurality of pan elements are configured as sensor pans which are provided with a protected recess which is open to the basement rock and in which the sensor carrier is arranged or can be arranged such that it can be disassembled together with the sensor head.

Abstract: A plough guide trough for plough guides of chain-drawn coal ploughs, comprising two superposed chain guide ducts separated by an integrally cast sliding spacer member, with a top guide strip, a bottom guide beam and a bottom slideway for guiding the plough. The top chain guide duct is covered by a front wall comprising the guide strip and merging into the guide beam and a slot lead-through for a plough guiding hook or plough knife is formed between the guide beam and the slideway. Pockets in the front wall receive a toggle coupling for neighboring plough guide troughs, wherein the front wall, the guide strips, the guide beam, the pockets and a back wall comprising the slideway form a one-piece casting extending over the length of the plough guide trough.

Abstract: A mining plow with a plow basic body which can be guided on a conveyor and which has on an inclined bearing surface a pivoting bolt for the pivotable mounting of a cutter carrier for each plow travel direction Two cutter carriers are mounted pivotably on respective pivoting bolts by a pivot bearing such that each cutter carrier is guided on a pivoting surface oriented concentrically about the pivot axis of the associated pivoting bolt and formed below the bearing surface on the plow basic body. The pivot bearing of each cutter carrier includes an open-edged receptacle, each cutter carrier being located on the pivoting bolt parallel to the bearing surface in a pivoting mounting position.

Abstract: A pick locking device for a plow pick that includes a pick shank inserted into a receptor box of a pick holder. The locking device may include a retaining pin and a deformable clamp element. The retaining pin may be forced through an opening on the pick holder into a locking groove extending in a shank insert direction along one side face of the shank. The clamp element may secure the retaining pin in a locked position, and may include a first leg and a second leg positioned at an angle to each other. The first leg may be inserted into a retainer in the pick shank and the second leg may be inserted into a locking recess on the retaining pin. The second leg may include a trunnion protruding from the first leg and an annular enclosed opening that extends to a rear of the first leg.

Abstract: A baseplate plow guide section for guiding a baseplate plow. The baseplate plow guide section includes a guide element arranged on a packing side of a conveyor trough delimited by lateral profiles and a return trough delimited by trough profiles of a conveyor. The guide element has an upper chain channel and a lower chain channel provided with a guide slot for the plow baseplate. Reception pockets for toggle heads of connecting toggles for connection of adjacent baseplate plow guide sections are formed on the guide element. The guide element includes a casting which extends over a length of the baseplate plow guide section and on which the reception pockets and/or the packing-side trough profile of the return trough and/or a guide part for the plow baseplate of the baseplate plow are cast as integral components.

Abstract: A plow cutter having a cutter foot that includes a cutter shank and a cutter head, the plow cutter including at least one face cutting edge, a plurality of wear-resistant face cutting edge pins each anchored in a respective recess located in the face cutting edge, at least one of the plurality being located on either side of a center plane of the cutter head, and a floor blade that includes at least one wear-resistant floor blade pin. Each of the plurality of the face cutting edge pins and the floor blade pin is made of a highly wear-resistant material, and has a conical pin head and a curved dome shape external surface.

Abstract: A baseplate plow with a multipart baseplate including a middle baseplate part connected to a plow body and two outer baseplate parts connected movably to the middle baseplate part. Guide blocks at a packing-side end of each baseplate part guide the baseplate in chain guide channels. Two chain blocks for connecting the plow pull chain are formed on a push member which is inserted into a recess at the packing-side end of the middle baseplate part, the recess being delimited in each of two running directions of the baseplate plow by a block part including a guide block and a stop surface for the push member.

Abstract: A pick locking device for a plow pick that includes a pick shank inserted into a receptor box of a pick holder. The locking device may include a retaining pin and a deformable clamp element. The retaining pin may be forced through an opening on the pick holder into a locking groove extending in a shank insert direction along one side face of the shank. The clamp element may secure the retaining pin in a locked position, and may include a first leg and a second leg positioned at an angle to each other. The first leg may be inserted into a retainer in the pick shank and the second leg may be inserted into a locking recess on the retaining pin. The second leg may include a trunnion protruding from the first leg and an annular enclosed opening that extends to a rear of the first leg.

Abstract: A coal plough for underground mining has a plough body that is guided along a plough guide. The 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 surface slides on a rail of the plough guide when the sliding skid is in its operating position. The sliding skid has first and second wear inlays on an underside which is arranged in the area of the highest load. The sliding skid can withstand high mechanical loads for a longer period of use.

Abstract: A bit holder for a ploughing bit of a coal or extraction plough includes 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 connection device for a plow installation, the device including a connection bracket having a basic body operable for attachment to a channel or guide section of the plow installation. A joint socket in the basic body includes a socket portion operable to receive a joint head of a boom cylinder. First and second legs are arranged in parallel and separated by a predetermined distance, with each leg including an inside portion and an outside portion. First and second supporting webs are located on the outside portions of the first and second legs, respectively. First and second bolt holes are located in the first and second legs, respectively, with a diameter of each bolt hole increasing from the inside portion of each leg to the outside portion. A joint bolt is located in the first and second bolt holes, and a clamping piece is located in each bolt hole.

Abstract: A mining plow with a plow basic body which can be guided on a conveyor and which has on an inclined bearing surface a pivoting bolt for the pivotable mounting of a cutter carrier for each plow travel direction Two cutter carriers are mounted pivotably on respective pivoting bolts by a pivot bearing such that each cutter carrier is guided on a pivoting surface oriented concentrically about the pivot axis of the associated pivoting bolt and formed below the bearing surface on the plow basic body. The pivot bearing of each cutter carrier includes an open-edged receptacle, each cutter carrier being located on the pivoting bolt parallel to the bearing surface in a pivoting mounting position.