| 摘要 |
A mining machine 1 of the shearer type comprises an elongate machine body 2 housing inter alia a power unit 11 for powering at least one rotary, mineral cutting head 10, and at least one haulage unit 12 mounted on the outside of the machine body. The haulage unit includes a variable speed motor 16, such as an electric AC motor. The motor is connected via speed reduction gearing 19 to a machine haulage sprocket 13 adapted to progressively engage rack bars 14 or a chain extending along the mineral face 5. A brake unit is also provided in the haulage unit. By locating one or more haulage units outside the machine body, the units can be located at appropriate locations, on either the goaf or face sides of the machine, or both sides, to suit particular operating conditions. |
