Chain coupling structure for chain drive for driving underground mining equipment such as wood, has driven element and coupling housing which is provided with chain tunnel and several bars, and are hydraulically moved into chain tunnel

摘要

The structure has a driven element (10) which is connected to a coupling housing (22) that is provided with a chain tunnel (28) and several bars (30), and are hydraulically moved into the chain tunnel. The hydraulic accumulator is connected to bars through a conduit system in communication with a closed system. A check valve is provided in parallel to a pressure control valve. A stop (38) is provided for limiting the retraction of each bar into the chain tunnel. Independent claims are included for the following: (1) method for operating chain drive structure; and (2) apparatus for operating chain drive structure.