Abstract

The invention relates to a sprocket for chain drives, having a rotational axis D and having two groups of pockets (20, 30), which are arranged adjacent to one another and offset with respect to one another on the periphery of the sprocket, for chain links which pass the sprocket in an oblique position. Each pocket (20, 30) is delimited at the side by a side wall (24; 34) and by an opposing wall (26, 36) and in the peripheral direction by webs (31; 21). In order to be able to produce a sprocket for obliquely running-in chain links more easily, and to create a better force distribution, according to the invention the side wall and the opposite wall of a pocket form contact surfaces for the chain links, which contact surfaces run obliquely with respect to the rotational axis D and extend to a base section (25, 35) of the pockets.

IPC Classes  ?

• F16H 55/30 - Chain wheels
• B65G 23/06 - Drums, rollers, or wheels with projections engaging abutments on belts or chains, e.g. sprocket wheels

Abstract

The invention relates to a guide shoe for a roller-type loader, particularly for a drive assembly for a roller-type loader, comprising at least one base wall (51), a guide piece on the side of the base wall for engaging under a lantern pinion (7) of a lantern pinion arrangement and comprising a guide surface for engaging behind the lantern pinion. In order to allow for shorter downtime periods when repairing the drive assembly for a roller-type loader due to wear, and in order to reduce the susceptibility to wear due to the design, the guide piece and the guide surface are provided on wear inserts (70), which are mounted, or can be mounted, on the guide shoe such that they can be preferably moved and replaced. The pivoting mobility of the guide pieces can be limited by means of pivot delimiting strips or can be prevented by means of clamping strips.

IPC Classes  ?

• E21C 29/02 - Propulsion of machines for slitting or completely freeing the mineral from the seam by means on the machine exerting a thrust against fixed supports

Abstract

The invention relates to a shield-type support frame for the mining industry, comprising two horizontal runners (50), two front guide rods (20), and two rear guide rods (30), which each are supported pivotally on the horizontal runner (50) by means of a front or rear swivel pin (5, 8). Each guide rod has two stringers (21, 31), which with the ends thereof protrude beyond a center bar (22, 32), which rigidly connects the stringers, as lower and upper fork joints. In order to minimize the risk of blockages of the guide rod when retracting the guide rod gear mechanism by means of design measures on the guide rod and/or on the horizontal runner, at least the center bars (22) of the front guide rods (20) with the fronts (25) thereof are disposed at a distance from the lower fork joints (23) of the front guide rods (20), while forming vertical debris pass-throughs (26), and/or the horizontal runners (50) are provided with oblique bottoms (53) for lateral debris removal. The invention also relates to the horizontal runners.

IPC Classes  ?

• E21D 23/03 - Mine roof supports for step-by-step movement, e.g. in combination with provisions for shifting of conveyors, mining machines or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support

Abstract

The invention relates to a connecting device for underground mining for fastening an attachment (19) to a side bracket of a trough pan, with a holding device (51) with shaft (52) and head (56), and with a counter piece arranged on the shaft. The invention relates further to a trough pan for mining. To make available connecting devices or trough pans by which an attachment can be fastened which can withstand high tensile forces in a simple manner and with little effort for assembly or disassembly, the holding device (51) is designed as a vise that can be anchored so as to stick out. On the head (56) thereof which is connected and fixed to the shaft, at least one placement surface (53) is designed which extends at an angle to the longitudinal axis of the shaft (2). The counter piece is designed as a wedge grip (70) which can be arranged between the placement surface (53) and the attachment and is movable by means of a stud (90).

IPC Classes  ?

• E21F 13/06 - Transport specially adapted to underground conditions at or adjacent to the working face
• B65G 19/18 - Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors Details

Abstract

The invention relates to an apparatus for the milling cutting and/or drilling of materials, in particular for removing rock, minerals or coal, comprising a tool drum (104) which is mounted on a drum carrier (101) such that it can rotate about a drum axis H, in which tool drum a plurality of tool shafts (105) which carry milling cutting/drilling tools (116) at their ends are mounted such that they can be driven to rotate, wherein at least two of the tool shafts (105) can be driven by a common gear drive which comprises output gearwheels (107) which are arranged in a rotationally fixed manner on the tool shafts (105), and a common drive element (108) which interacts with the output gearwheels (107), wherein the drive element (108) and the tool drum (104) can be rotated relative to one another. Provision is made according to the invention for the axes W of the tool shafts (105) to lie transversely with respect to the drum axis H. In the apparatus (110) according to the invention, a very short, compact, pulse-like engagement of the individual milling cutting/drilling tools (116) in the rock to be extracted can be achieved.

IPC Classes  ?

• E21C 27/22 - Mineral freed by means not involving slitting by rotary drills with breaking-down means, e.g. wedge-shaped drills

Abstract

The invention relates to a shearer loader for underground mining, with cutting drums for each direction of travel, with a cooling-water circuit (30) for cooling the drive motors (31, 32), with a spray system comprising at least one spray-water circuit (25a, 25b) with a respective feed line (23a, 23b) to the tools of the cutting drums (4), with a common water connection (1) for the water circuits, and with valves assigned to the water circuits for switching the circuits on or off. Provision is made according to the invention for return lines of the cooling-water circuit to have a respective switching valve (37a, 37b) arranged therein which is connected to one of the feed lines and via which the cooling water can be fed as spray water to the cutting drums as required.

IPC Classes  ?

• E21C 35/22 - Equipment for preventing the formation of, or for removal of, dust

Abstract

The invention relates to a winning machine for mining, in particular a shearing machine (10), for extracting a material along a face, having a machine body (11) and having at least one slide block (16) which supports the machine body (11) and, during operational use, slides, by way of a sliding surface (23) formed in particular on an underside of its slide-block body, on a slideway (18) extending along the face. The invention also relates to such a slide block (16). In order considerably to reduce the wear to the slide block and to the slideway, the slide block (16) has a pressure-medium line (26) which can be subjected to the action of a pressure fluid and has at least one outlet opening (27) for the pressure fluid, the outlet opening out from the sliding surface (23) of the slide block (16), for the hydrostatic sliding support of the slide block (16) on the slideway (18).

IPC Classes  ?

• E21C 35/12 - Guiding the machine along a conveyor for the cut material
• F16C 29/02 - Sliding-contact bearings
• F16C 32/06 - Bearings not otherwise provided for with moving member supported by a fluid cushion formed, at least to a large extent, otherwise than by movement of the shaft, e.g. hydrostatic air-cushion bearings

Abstract

The invention relates to a link chain for scraper chain conveyors having vertical chain links (1), suspended in an articulated manner one inside the other, and horizontal chain links (2), wherein the vertical chain links (1), all the way round, have a constant cross-sectional profile (10) provided with a flattened portion on the outside and with a curved portion on the inside, and the horizontal chain links (2) have front parts (6) with a rectilinear end zone (7), and wherein the longitudinal legs (5) of the horizontal chain links (2), these legs connecting the front parts (6), are provided with a narrowing (18) on their outer surfaces. In order to improve the running behaviour of the link chain (50) in the case of low surface pressure between the chain wheel and the horizontal chain links (2), the horizontal chain links (2) have on both sides, in the narrowing (18), carry-along means (21) by means of which scrapers which can be connected to the horizontal chain links (2) are carried along in a form-fitting manner and/or the cross-sectional profile (10) of the vertical chain links is provided with bevelling in each case at the transition between the flattened portion and the curved portion. The invention also relates to a chain wheel which is suitable for this chain.

IPC Classes  ?

• B65G 19/20 - Traction chains, ropes, or cables
• B65G 19/24 - Attachment of impellers to traction element
• B65G 23/06 - Drums, rollers, or wheels with projections engaging abutments on belts or chains, e.g. sprocket wheels
• F16H 55/30 - Chain wheels

Abstract

The invention relates to scrapers (10) for link chains of in particular double-centre scraper chain conveyors, comprising a single-part scraper body with a top crosspiece (2), which connects two lateral scraper blades (1), and at least one insertion pocket (5) for the insertion of a horizontal chain link (52) of the link chain and securing of the scraper (10) by means of a releasable scraper-securing element (40). In order to improve the carrying-along action of the scrapers (10) connected to the horizontal chain links, and also for it to be possible to use the scrapers with new types of link chains, grooves extend in the insides (11) of the scraper blades (1) and outsides of an intermediate crosspiece (6), over the height of the leg bases (15), up to the top crosspiece (2) and form mounts for carry-along protrusions (58) on the outer surfaces of the legs (56) of the horizontal chain links (52). The invention also relates to the scraper-securing element (40).

IPC Classes  ?

• B65G 19/10 - Conveyors comprising an impeller or a series of impellers carried by an endless traction element and arranged to move articles or materials over a supporting surface or underlying material, e.g. endless scraper conveyors for moving bulk material in open troughs or channels the impellers being scrapers similar in size and shape to the cross-section of the trough or channel and attached to a pair of belts, ropes, or chains
• B65G 19/24 - Attachment of impellers to traction element

Abstract

In the case of the arrangement according to the invention for extracting extraction products in caving, the extraction product being removed downwards, by way of a removal hopper (10), into a removal section (11) and being transferred, from the latter, to a removal conveyor arranged in a conveying section, wherein the removal section extends transversely between the conveying section (13) and an auxiliary section (12) moved up parallel to the latter, a loading ramp (16) is arranged in the removal section (11) and forms a ramp surface which is oriented essentially transversely to the conveying direction of the removal conveyor and is inclined in the direction of this removal conveyor. In order for it to be possible to regulate the quantity of extraction material removed by way of the removal hopper and to clear out the removal section quickly and particularly straightforwardly when it has become clogged with extraction material, the invention makes provision for the removal section to be provided with a rail guide (19) which is fixed on the floor or footwall (15), which extends in the region between the auxiliary section and the conveying section, up to which the loading ramp (16) leads and along which this can be displaced, by means of a displacement drive (20), in the direction of the conveying section and in the opposite direction.

IPC Classes  ?

• E21C 35/20 - General features of equipment for removal of chippings, e.g. for loading on conveyor
• E21D 9/12 - Devices for removing or hauling away excavated material or spoilWorking or loading platforms
• E21F 13/04 - Transport specially adapted to underground conditions in gravity inclinesTransport specially adapted to underground conditions in staple or inclined shafts
• E21F 13/06 - Transport specially adapted to underground conditions at or adjacent to the working face