Abstract: A drive and tensioning unit for a scraper chain conveyor, in particular a face conveyor for drum cutter-loader mining apparatus, includes a telescopically configured machine frame having a machine frame base and a machine frame head, which is displaceable relative to the machine frame base by at least one hydraulic cylinder and has bearing recesses for supporting a chain drum shaft. Each hydraulic cylinder is supported at one end in a connecting joint on a side board of the machine frame head and at the other end in a connecting joint on a side wall of the machine frame base. The connecting joints include a recess in the side boards and the side walls and bearing brackets detachably anchorable in the recesses. Each of the recesses provided in the side boards and in the side walls are structurally identical.

Abstract: The invention relates to a drive and tensioning unit for a scraper chain conveyor, in particular a face conveyor for drum cutter-loader mining apparatus, comprising a telescopically configured machine frame (10) having a machine frame base and a machine frame head, which is displaceable relative to the machine frame base by means of at least one hydraulic cylinder (20) and has bearing recesses (6) for supporting a chain drum shaft, each hydraulic cylinder (20) being supported at one end in a connecting joint (30) on a side board (4) of the machine frame head (2) and at the other end in a connecting joint (30?) on a side wall (15) of the machine frame base (1). in order to improve the unit, the connecting joint (30) comprises a recess in the side board (4) an/or in the side wall (15) and a bearing bracket detachably anchorable in the recess (31), wherein structurally identical recesses are provided in both side boards (4) and in both side walls (15).

Abstract: A chain wheel arrangement for driving or reversing stations of underground scraper chain conveyors, comprising a chain wheel (1), a chain-wheel shaft (3) comprising a splined portion (11) between two offset-diameter shaft stub portions and to which the chain wheel (1) can be fastened in rotational engagement by axial sliding on to it, also comprising bearing shells (5) receiving bearings for the chain-wheel shaft (3), disposed on each side of the chain wheel (1) and adapted to be fastened in bearing-shell recesses, open at the edges, in the side cheeks of the driving or reversing station, also comprising bearing support rings (26) which abut the outer cage (4B) of the bearings (4), and securing means comprising spacer sleeves (16) for axially securing the chain wheel (1) relative to the splined portion (11), in which the spacer sleeves (16) rest loosely between the bearings (4A) and the chain wheel (1), wherein a clamping cover (30) is fastened to at least one shaft end (13) and presses against a clamping sle

Abstract: A chain wheel arrangement for driving or reversing stations of underground scraper chain conveyors, comprising a chain wheel (1), a chain-wheel shaft (3) comprising a splined portion (11) between two offset-diameter shaft stub portions and to which the chain wheel (1) can be fastened in rotational engagement by axial sliding on to it, also comprising bearing shells (5) receiving bearings for the chain-wheel shaft (3), disposed on each side of the chain wheel (1) and adapted to be fastened in bearing-shell recesses, open at the edges, in the side cheeks of the driving or reversing station, also comprising bearing support rings (26) which abut the outer cage (4B) of the bearings (4), and securing means comprising spacer sleeves (16) for axially securing the chain wheel (1) relative to the splined portion (11), in which the spacer sleeves (16) rest loosely between the bearings (4A) and the chain wheel (1), wherein a clamping cover (30) is fastened to at least one shaft end (13) and presses against a clamping sle