Track laying machine for renewing rails

Railways – Track layers – Distributers

Patent

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Details

E01B 2902

Patent

active

056091060

DESCRIPTION:

BRIEF SUMMARY
FIELD OF THE INVENTION

The invention relates to a track building machine for the renewal of tracks, comprising a machine frame, supported on rail mountings, having a work aggregate exhibiting devices for preparing a ballast bed, for lifting out old ties and for laying new ties, having devices for transporting the old and new ties and for raising, guiding and stretching apart old rails and having a slide mechanism, which is rollable on the old ties, for supporting a rail mounting in working deployment, which rail mounting is disposed directly in front of the work aggregate in the direction of working.


PRIOR ART

A track building machine of this type is already known by virtue of EP 0 168 103 A2. This machine comprises a first machine frame which is supported on two rail mountings and to which a second machine frame is attached. The latter is supported against the track, at its rear end in the direction of working, by a rail mounting. Directly nearby there is provided a vertically adjustable chain mounting, which is supported upon the newly laid ties as the said rail mounting is raised in working deployment. The rear rail mounting of the first machine frame, which is located in the region of the articulation, is deposited in working deployment onto a slide mechanism, which, for its part, is movable on the old ties.
From DE 29 09 575 B, a mobile device for laying rails and/or ties of a track is known, which exhibits two machine frames interconnected at one end by an articulated arrangement and resting respectively, at the other end, on a respective mounting, and in which the work aggregate for receiving the old ties and for laying the new ties and the devices for stretching apart the old rails and for laying the new rails are disposed between the two said mountings. In addition, in the region of the articulated arrangement of the two machine frames, a central mounting is provided, which is provided during the work phase with a slide mechanism which is displaceable directly on the ties of the track such that it is laterally guided by these.
A further type of the known track building machines for the renewal of tracks is described in DE 28 18 514 B. Here a mobile device for the continuous exchange or renewal of a track comprising rails and ties is represented, which device consists of a vehicle convoy, the main reconstruction part of which is configured as a supporting frame, which is mounted with both ends on rail mountings and on which, between the mountings, there are fitted the work elements for the exchange or renewal of the rails and/or ties. The supporting frame of this machine is formed from 2 frame parts interconnected in an articulated manner exhibiting, in the region beneath the frame articulation, a vertically adjustable third rail mounting. In a variant of this invention, there is provided in the region of the frame articulation an additional, vertically adjustable portal running gear for the temporary support of the supporting frame during the work journey, the portal running gear being movable on the new rails mounted in front in the front-head region of the ties.
The aforementioned known machines of the generic type exhibit a total of two machines or frame parts interconnected in an articulated manner, to which the work elements are fitted. The effect of this arrangement is that the machines require a large structural length, a heavy weight and correspondingly high costs.


SUMMARY OF THE INVENTION

The object of the present invention is to provide a track building machine for the renewal of tracks, which avoids the above-stated drawbacks of the known machine types and which, combined with a structural simplification and a low-cost construction, guarantees a qualitatively improved and operationally easier functioning.
This object is achieved according to the invention, using a track building machine of the generic type, by virtue of the fact that the work aggregate for lifting out the old and laying the new ties, outside a section limited by the rail mountings connected to the machine frame,

REFERENCES:
patent: 4274334 (1981-06-01), Lund
patent: 4325306 (1982-04-01), Valditerra
patent: 4979247 (1990-12-01), Buhler
patent: 5337675 (1996-08-01), Aubermann

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