| 摘要 |
A milling machine having a rotary cutter drum which is movable both horizontally and vertically into operating position. The milling machine includes a mobile frame, a cutter rack, a cutter housing, a cutter drum and a pair of cutter skids. The cutter rack is mounted for vertical sliding movement to the front end of the frame. A pair of hydraulic cylinders are provided between the frame and the cutter rack to move the cutter rack to an operating elevation. In turn, the cutter housing is mounted for horizontal sliding movement to the cutter rack. A hydraulic cylinder is provided to move the cutter housing horizontally to a milling position. The cutter skids are positioned on opposite sides of the cutter housing to bear on a surface being milled and to support the cutter housing and cutter during the milling operation. Two hydraulic cylinders are provided on each side of the cutter housing to move the cutter housing vertically to set the cutter drum to a cutting depth. The rotary cutter drum is transversely mounted within the cutter housing with a portion of the cutter drum protruding from the bottom of the cutter housing. The frame is supported on front and rear wheels by legs which telescope under electro-hydraulic control to adjust the elevation of the frame.
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