Abstract: The invention relates to a plough chain strand 50 with horizontal chain links and vertical chain links consisting of normal chain links 30, 40, the chain link legs of which are connected by means of chain link arcs and engage one another alternately in an intractable manner. In the chain strand 50 in front of and behind the chain connector link 10 is arranged in the same installation position as this at least one special chain link 20, the link legs of which comprise the same outer contour, especially the same width and the same thickness, as the outer legs of the connector link parts of the chain connector link 10. Due to the special chain links 20 preceding and trailing the chain connector link and having the same or a marginally larger contour as this, the wear of the chain connector link 10 of the chain strand 50 according to the invention is reduced or avoided if compared to known plough chains.

Abstract: A drive and tensioning station (10) of a chain scraper conveyor for mining operations with a machine frame base (20) having side cheeks (21) and a conveyor base (22), connected to a line of pans of the chain scraper conveyor, with a tensioning frame head (50) which can be moved in the direction of the line of pans, in whose side cheek plates (51) can be mounted the chain drum (3) for the scraper chain, and with a tensioning drive having at least one tensioning cylinder (6) to move the tensioning frame head (50) relative to the machine frame base (20). The tensioning frame head (50) has a box-like drawer (60) extending out over the side cheek plates (51) toward the pan connecting side, which is guided in a type of drawer guide (26) on the machine frame base (20) and that on the tensioning frame head (50) a top run pan (70) forming a drag plate in the top run (4) and/or a bottom run box (40) forming a drag base in the bottom run are removably fastened.

Abstract: A drive shaft (5) with at least one chain wheel (7) for the drive of chain scraper conveyors, especially for underground mining operations, with a full-width drive shaft (5) mounted on both ends in bearings (4) on the machine frame (1), which has outer gearing teeth (6) for the positive rotational engagement with single part chain wheels (7), which can be pulled off the drive shaft (5), whereby the drive shaft (5) has outer teeth (6) along its longitudinal region, in which a through central gearing (6) reaches to the reduced diameters (17) of the drive shaft (5) in the proximity of the bearing housings (3).

Abstract: A drive station for a chain scraper conveyor for mining operations, in which the height position of a drive shaft, can be set by means of an adaptor plate (50), which can be fastened at different height levels on the machine frame of the drive station. The adaptor plates (50) includes a machine frame side inner side (52) and a drive side outer side (53), onto which the drive set can be fastened. The position of fastening screws (56), (57) in elongate holes (54), (55), in the adaptor plate (50) the direction of an asymmetric setting key (30) and the rotational position of an annular disc plate (40) with an outer ring (42) arranged eccentrically to an inner ring (41), determine the assembly position in each case.

Abstract: A drive and tensioning station (10) of a chain scraper conveyor for mining operations with a machine frame base (20) having side cheeks (21) and a conveyor base (22), connected to a line of pans of the chain scraper conveyor, with a tensioning frame head (50) which can be moved in the direction of the line of pans, in whose side cheek plates (51) can be mounted the chain drum (3) for the scraper chain, and with a tensioning drive having at least one tensioning cylinder (6) to move the tensioning frame head (50) relative to the machine frame base (20). The tensioning frame head (50) has a box-like drawer (60) extending out over the side cheek plates (51) toward the pan connecting side, which is guided in a type of drawer guide (26) on the machine frame base (20) and that on the tensioning frame head (50) a top run pan (70) forming a drag plate in the top run (4) and/or a bottom run box (40) forming a drag base in the bottom run are removably fastened.

Abstract: In a drive station for a chain scraper conveyor for mining operations the height position of the drive shaft, having a chain sprocket, can be set by means of an adaptor plate 50, which can be fastened at different height levels on a flange mounting zone on the machine frame of the drive station. The adaptor plates 50 have a machine frame side inner side 52 and a drive side outer side 53, onto which a drive set can be fastened. The adaptor plate 50 is fixed in position by means of fastening screws 56, 57 which engage through elongate holes 54, 55 into the machine frame. The position of the fastening screws 56, 57 in the elongate holes 54, 55, the direction of an asymmetric setting key 30 and the rotational position of an annular disc plate 40 with an outer ring 42 arranged eccentrically to an inner ring 41 determine the assembly position in each case.

Abstract: A drive shaft (5) with at least one chain wheel (7) for the drive of chain scraper conveyors, especially for underground mining operations, with a full-width drive shaft (5) mounted on both ends in bearings (4) on the machine frame (1), which has outer gearing teeth (6) for the positive rotational engagement with single part chain wheels (7), which can be pulled off the drive shaft (5), whereby the drive shaft (5) has outer teeth (6) along its longitudinal region, in which a through central gearing (6) reaches to the reduced diameters (17) of the drive shaft (5) in the proximity of the bearing housings (3).

Abstract: This invention relates to a chain drum arrangement for a central or double central scraper chain conveyor, comprising a divided chain wheel, the shell-type chain wheel segments of which are attached, locked in rotation and detachably, via an axial splined portion to the shaft, wherein the chain wheel is secured in its installed position on the shaft by means of locking rings disposed on both sides and at least one of these two locking rings consists of a divided locking ring which can be taken off radially from the shaft in order to remove the divided chain wheel from the shaft. According to the invention, the divided locking ring is disposed as an intermediate ring between the divided chain wheel and a hollow journal which receives the respective shaft bearing and which projects axially from the respective side cheek of the machine frame into the interior space thereof, which results in a narrow mode of construction of the divided locking ring.

Abstract: A chain drum arrangement for a central or double central scraper chain conveyor which includes a divided chain wheel and shell-type chain wheel segments which are attached and locked in rotation to or detachably from the shaft. The chain wheel is secured in its installed position on the shaft by ring parts disposed on both sides of the chain wheel, and at least one of these ring parts has a divided locking ring which can be taken off radially from the shaft in order to take off the divided chain wheel from the shaft.