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1. WO2000030919 - TRAIN DE ROULEMENT A GABARIT D'ECARTEMENT VARIABLE

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

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Claims

1. An undercarriage (10) with variable track gauge comprising a main frame (12) defining a first and a second mutually opposite flanks (14, 16), a first and a second sub-frame (18, 20) each for supporting respective driving means (22, 24) of the undercarriage positioned each in correspondence with a respective one of said first and second flank (14, 16) of the main frame (12), wherein said main frame (12) presents in correspondence with each of said first and second flanks (14, 16) at least a respective seat (26,2 8, 30, 32), for the sliding housing of a corresponding beam element (34, 36, 38, 40) extending from the respective sub-frame (18, 20), and wherein means (42, 44) are provided for moving said first and second sub-frame (18, 20) between at least a first position with reduced track gauge, wherein said first and second sub-frame (18, 20) are approached to the respective flank (14, 16) and the respective beam elements (34, 36, 38, 40) are recessed in the respective seats (26, 28, 30, 32), and a second position with widened track gauge, wherein at least one of said first and second sub-frame (18, 20) is moved away from the respective flank (14, 16) and the respective beam element (34, 36, 38, 40) extends to the exterior of the respective seat (26, 28, 30, 32), the undercarriage being characterised in that it comprises means for blocking the sliding of the respective beam elements (34, 36, 38, 40) within the corresponding seat (26, 28, 30, 32) comprising a first inclined surface (46, 48) positioned within the respective seat (26, 28) and a second inclined surface (50, 52) positioned in correspondence with the outer profile of the respective beam element (34, 36) and co-operating with said first inclined surface (46, 48) to fasten the beam element within the respective seat (26, 28).

2. Undercarriage according to claim 1, characterised in that each beam element (34, 36, 38, 40) is connected at an extremity (34a, 36a, 38a, 40a) and extending in overhang from the respective sub-frame (18, 20) terminating with a free extremity (34b, 36b, 38b, 40b) for insertion into the respective seat (26, 28, 30, 32).
3. Undercarriage according to either of the previous claims, characterised in that said first inclined surface (46, 48) positioned within the respective seat (26, 28, 30, 32) and said second inclined surface (50, 52) in correspondence with the outer profile of the respective beam element (34, 36, 38, 40) are oriented in such a way as to block the sliding of the respective beam element (34, 36, 38, 40) in the corresponding seat (26, 28, 30, 32) when the respective beam element (34, 36, 38, 40) extends outwards.

4. Undercarriage according to any of the previous claims, characterised in that said main frame (12) presents in correspondence with each of said first and second flanks (14, 16) respective first and second seat (26, 28, 30, 32) for the sliding housing of respective first and second beam element (34, 36, 38, 40) extending from the respective track-bearing sub-frame (18, 20), said first and second seat (26, 28, 30, 32) and said first and second beam element (34, 36, 38, 40) being longitudinally distanced from each other.

5. Undercarriage according to any of the previous claims, characterised in that each seat (26, 28, 30, 32) presents a quadrangular section and each beam element (34, 36, 38, 40) presents a quadrangular box profile.

6. Undercarriage according to any of the previous claims, characterised in that the first inclined surface (46, 48) is positioned in the vicinity of the outer edge of the respective seat (26, 28).

7. Undercarriage according to any of the previous claims, characterised in that said second inclined surface (50, 52) is provided in the vicinity of the free extremity of the respective beam element (34, 36).

8. Undercarriage according to any of the previous claims, characterised in that said first inclined surface (46, 48) extends over the entire width of the respective seat (26, 28).
9. Undercarriage according to any of the previous claims, characterised in that said second inclined surface (50, 52) extends over the entire width of the respective beam element (34, 36).

10. Undercarriage according to any of the previous claims, characterised in that said first inclined surface (46, 48) is provided on the lower side of the respective seat (26, 28) and said second inclined surface (50, 52) is provided on the lower side of the respective beam element (34, 36) in such a way as to act to thrust vertically said beam element (34, 36) upwards.

11. Undercarriage according to any of the previous claims, characterised in that said first inclined surface (46, 48) presents an angular position with respect to the horizontal ranging between 1 ° and 20°.

12. Undercarriage according to claim 1, characterised in that said first inclined surface (46, 48) presents a preferred angular position with respect to the horizontal equal to 4° to 6°.

13. Undercarriage according to any of the previous claims, characterised in that said second inclined surface (50, 52) is defined by a progressive widening of the section of the respective beam element (34, 36).

14. Undercarriage according to any of the previous claims, characterised in that means are provided for adjusting the vertical position of said first inclined surface (46, 48).

15. Undercarriage according to any of the previous claims, characterised in that means are provided for adjusting the inclination of said first inclined surface (46, 48).

16. Undercarriage according to any of the previous claims or the characterising part of claim 1 , characterised in that it comprises means for blocking the re-entry of the lo

respective beam element (34, 36) into the corresponding seat (26, 28), said means for blocking re-entry being in the form of a first inclined face (58, 60) positioned within the seat (26, 28) and of a second inclined face (62, 64) integral with the respective beam element (34, 36) and co-operating with said first face (58, 60) in the seat (26, 28) to fasten, when the respective beam element (34, 36) is made to re-enter in the seat (26, 28), the beam element (34, 36) itself in the respective seat (26, 28).

17. Undercarriage according to claim 16, characterised in that said first inclined face (58, 60) in the seat (26, 28) is situated in the vicinity of the inlet of said seat (26, 28) for housing the beam element (34, 36).

18. Undercarriage according to claim 16 or 17, characterised in that said second inclined face (62, 64) integral with the respective beam element (34, 36) is situated in correspondence with the extremity (34a, 36a) of said beam element (34, 36) which extends from the respective sub-frame (18, 20).

19. Undercarriage according to any of the previous claims from 16 to 18, characterised in that said first inclined face (58, 60) in the seat (26, 28) extends over the entire length of the respective seat (26, 28).

20. Undercarriage according to any of the previous claims from 16 to 19, characterised in that said second inclined face (62, 64) integral with the beam element (34, 36) extends over the entire width of the respective beam element (34, 36).

21. Undercarriage according to any of the previous claims from 16 to 20, characterised in that the first inclined face (62, 64) in the respective seat (26, 28) is provided on the lower side of the seat (26, 28) and said second inclined face (62, 64) integral with the respective beam element (34, 36) is provided on the lower side of the same beam element (34, 36) in such a way as to act to thrust said beam element (34, 36) upwards.

22. Undercarriage according to any of the previous claims from 16 to 21, characterised in that means are provided for adjusting the vertical position of said first inclined face (62, 64) in the respective seat (26, 28).

23. Undercarriage according to any of the previous claims, characterised in that the respective first inclined surface (46, 48) for blocking the extraction of the respective beam element is defined by a respective wedge element (66, 68), means being provided for fastening said wedge element (66, 68) within the respective seat (26, 28).

24. Undercarriage according to claim 23, characterised in that said means for fastening said one wedge element (66, 68) defining the first inclined surface (46, 48) are able to fasten said wedge element (66, 68) in removable manner within the respective seat (26, 28).

25. Undercarriage according to claim 24, characterised in that said means for fastening the wedge element (66, 68) in a removable manner comprise an elongated bolt (70, 72) which is inserted within a first recess (74, 76) in correspondence with a surface of said seat (26, 28) and within a second recess (78, 80) provided in said wedge element (66, 68) in correspondence with the engagement surface with said surface for the first recess (74, 76) of said seat (26, 28).

26. Undercarriage according to any of the previous claims from 16 to 25, characterised in that said first inclined face (58, 60) positioned within the seat (26,

28) for blocking the re-entry of the respective beam element (34, 36) is situated on said wedge element (66, 68) and is longitudinally aligned to said firs surface (46, 48) for blocking the outward extension of the beam element (34, 36) presenting an inclination opposite thereto.

27. Undercarriage according to any of the previous claims from 14 to 26, characterised in that said means for adjusting the height position of said first inclined position (46, 48) and/or said first inclined surface (58, 60) comprise at least one adjustment grub screw (82, 84, 86, 88) movable bi-directionally and engaging against the side of said wedge element (66, 68) which is opposite the one for engaging with the respective beam element (34, 36).

28. Undercarriage according to any of the previous claims from 15 to 27, characterised in that said means for adjusting the inclination of said first inclined surface comprise at least one adjustment grub screw (82, 84, 86, 88) eccentrically engaging against the side of said wedge element (66, 68) which is opposite the one engaging with the respective beam element (34, 36).

29. Undercarriage according to either of the previous claims 27 or 28, characterised in that it comprises a first and a second series of adjustment grub screws (82, 84, 86,

88) longitudinally distanced from each other within the seat (26, 28).

30. Undercarriage according to any of the previous claims from 2 to 29, characterised in that the corresponding seats (26, 28) provided on opposite flanks (14, 16) of said main frame (12) are realised by a respective housing cavity elongated transversely, means are provided for simultaneously adjusting, in the recessed position within the respective seat, the vertical position of the free extremities (34b, 36b) of the beam elements (34, 36) extending within the opposite seats (26, 28) of the main frame (12).

31. Undercarriage according to claim 30, characterised in that said means for simultaneously adjusting the vertical position of the free extremities (34b, 36b) of said beam elements (34, 36) in the recessed position within the opposite seats (26, 28) of the main frame (12) comprise at least a central plate (90) for supporting said free extremities (34b, 36b) of said beam elements (34, 36) and means for moving bilaterally in the vertically said plate (90) in the form of at least one adjustment grub screw (92, 94) engaging against the face of said plate element (90) which is opposite the face for supporting the free ends (34b, 36b) of said beam elements (34, 36).

32. Undercarriage according to either of the previous claims 30 or 31, characterised in that said central plate (92) within the cavity defining opposite seats (26, 28) of the main frame is positioned in such a way as to thrust the free extremities (34b, 36b) to engage against an opposite surface in the seat (26, 28).

33. Undercarriage according to any of the previous claims, characterised in that means are provided for lubricating said first and second inclined surfaces (46, 48, 50, 52) for blocking the extraction of the respective beam element from the corresponding seat (26, 28).

34. Undercarriage according to claim 33, characterised in that said means for lubricating said first and second inclined surface (46, 48, 50, 52) comprise a plurality of lubrication conduits (96, 98) on said first inclined surface.

35. Undercarriage according to claim 34, characterised in that said lubrication conduits comprise at least a primary longitudinal channel (96) transversely whereto extend a plurality of secondary conduits (98).

36. Undercarriage according to any of the previous claims from 16 to 35, characterised in that the preferred inclination for said inclined faces 858, 60) for arresting the beam elements in closing the sub-frames on the main frame ranges between 35° and 80°, preferably equal to 40° to 60°.