| 摘要 |
12 A ballast grading machine (1) comprising a machine frame (4) supported on on-track undercarriages (5) is provided with a ballast plough (11) designed for vertical adjustment by means of drives (8), a vertically adjustable and rotatable sweeping brush (18), a suction arrangement (17) having a vacuum generator (16), and a driver's cab (19). The machine frame (4) consists of a front, first frame part (2), in the direction of travel, which has the ballast plough (11) and another, second frame part (3) joined to the said first frame part in an articulated manner and having the vacuum generator (16) and the sweeping brush (18). The suction arrangement (17) has a suction nozzle (20) projecting over the rear machine end (21), with respect to the direction of travel, connected by a flexible suction pipe (22) to the vacuum generator (16) and connected to a drive (40), the said suction nozzle being adjustable by means of a control unit (23) in the adjacent driver's cab (19). (Fig. 1)
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