| 摘要 |
A track maintenance machine for excavating material from a track bed comprises a machine frame comprising an upwardly recessed machine frame section, undercarriages supporting the machine frame on the track for movement in an operating direction, and sequentially arranged on the machine frame in the operating direction, a ballast receptacle comprising chutes for discharging the ballast from the receptacle, an inclined, vertically adjustable and revolvable endless excavating chain comprising a drive at an upper end for revolving the chain, the excavating chain being mounted underneath the upwardly recessed machine frame section for excavating the material from the bed, a track lifting device, a conveying arrangement arranged to remove the received excavated material and having an inlet end arranged below the upper excavating chain end to receive the excavated material therefrom, the ballast discharging chutes being arranged immediately behind the conveying arrangement inlet end in the operating direction, and a ballast clearing device mounted underneath the upwardly recessed machine frame section and comprising ballast clearing tools and drives for adjusting the ballast clearing tools vertically and transversely to the longitudinal direction. The track lifting device is arranged between the excavating chain and the ballast clearing device.
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