Patent ID: 8627948

Claim:
A drive and tensioning unit for a scraper chain conveyor for a drum cutter-loader mining apparatus, comprising: a telescopically configured machine frame having: a chain drum shaft, a machine frame base having a side wall, and a machine frame head having a side board, the machine frame head being displaceable relative to the machine frame base and having bearing recesses for supporting the chain drum shaft; at least one hydraulic cylinder coupled to the machine frame base and the machine base head, each hydraulic cylinder being supported at one end by a first connecting joint on the side board of the machine frame head and at the other end by a second connecting joint on the side wall of the machine frame base; wherein the connecting joints comprise: a recess in the side board and in the side wall, each of the recesses comprising at least one undercut retaining lug, a bearing bracket detachably anchorable in each recess, each of the bearing brackets comprising a base plate having at least one locking projection for under-gripping or back-gripping the retaining lug, a locking block removably disposed at least partially in the recess to restrict movement of the base plate, and a locking plate removably coupled to the bearing bracket to restrict movement of the locking block.