| 摘要 |
<p>A mobile machine for leveling, lining and tamping a track, which comprises a heavy main frame supported on two undercarriages spaced apart for continuous movement in an operating direction, a drive for continuously advancing the main frame along the track in the operating direction, an operator's cab, a power plant and operating controls on the main frame, a lighter subframe leading one of the undercarriages in the operating direction, tamping heads mounted on the subframe for tamping ballast in intermittent tamping cycles under respective ties at points of intersection of the two track rails and the respective ties a track lifting and lining unit associates with the two rails mounted on the subframe ahead of the tamping heads in the operating direction, the subframe and the tamping heads and track lifting and lining unit mounted thereon constituting an operating unit and the tamping, lifting and lining unit is arranged within sight of the operator's cab, and a drive connecting the lighter subframe to the heavy main frame for adjusting the position of the subframe in relation to the main frame in the operating direction, the drive of the main frame and the drive for the subframe being synchronized whereby the subframe may be held stationary intermittently during each one of the tamping cycles while the main frame is advanced continuously. The power plant delivers power to, and the operating controls control, the drive and the tamping heads and track lifting and lining unit.</p> |
