| 摘要 |
PCT No. PCT/GB82/00058 Sec. 371 Date Dec. 8, 1982 Sec. 102(e) Date Dec. 8, 1982 PCT Filed Feb. 22, 1982 PCT Pub. No. WO82/03654 PCT Pub. Date Oct. 28, 1982.A longwall coal-mining machine has a gearcase at each of its ends, each gearcase carrying two ranging arms respectively mounting a cutter drum and a lump breaker, and also carrying a haulage drive. Each gearcase comprises a casing having therein first and second co-axial and mutually-spaced transverse horizontal shafts projecting through opposite sides of the casing driven by individual transmissions located in the gearcase and from an electric motor and a hydraulic motor, respectively, both outside the casing. Rotation of the second shaft drives the mining machine along a longwall face. Rotation of the first shaft actuates a cutter drum through a gear train and also actuates a lump breaker through a gear transmission. |
