| 摘要 |
The invention relates to cutting drums for mineral mining machines, such as the type of machine used in mineral mining to drive a roadway and to cut a stable for advancing a longwall face. The drum which is mounted on a mineral mining machine for rotation on an axis normal to the direction of movement of the machine along a mineral face comprises a hub portion and a hollow cylindrical portion extending from a flange on the end of the hub portion, the cylindrical portion having cutting picks mounted around the free end portion thereof and series of cutter picks mounted in the form of at least one helix internally of the cylindrical portion which forms a trepanner cutter and at least one helical flange with cutting picks thereon extending radially from the free end of the cylindrical portion to the opposite end of the hub portion. The drum is movable in an arc from a lowered position to a raised position and movable into the mineral face to cut a circle of mineral by a trepanner action and movable along the face to cut mineral from the face.
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