Patent Application
20080011188
The invention will now be described in a more precise but non-limiting manner, with reference to the appended Figures, in which:
The rail vehicle body lateral face which is illustrated as an exploded view in
The framework 1 includes a plurality of panels which are juxtaposed and fixed together in order to form a continuous assembly. These panels are, on the one hand, panels of the type involving central panels 2, which correspond to the central portion which extends over the main part of the length of the lateral face of the rail vehicle body, end panels 6 and 6′ which are arranged at the two ends of the lateral face of the rail vehicle body, a panel 8 which is intended to receive a door and which includes a door opening 9, and an intermediate panel 4 for connection between a central panel 2 and a panel 8 which is intended to receive a door.
The central panels 2 and a first end panel 6 include recesses which delimit, on the framework 1, generally elongate rectangular openings 5 which are intended to form the apertures for the windows of the body of the rail vehicle.
The intermediate panel 4 and the second end panel 6′ which surround the door also include recesses which form in the shell 1 openings 7 and 7′ which are smaller than the windows 5 of the central portion of the lateral panel. In the example illustrated in
The outer skin 10 includes a thin continuous wall which is intended to cover the whole of the surface-area of the lateral face of the body of the rail vehicle. The outer skin 10 includes rectangular openings 11 facing the rectangular openings 5 of the inner framework which are intended to form windows. The outer skin 10 also includes an opening 12 facing the opening 9 of the panel 8 which is intended to receive a door of the lateral face of the body of the rail vehicle.
When the outer skin 10 is attached to the inner framework 1, glazed panels 15 are arranged on the skin facing openings 11 in order to close all of the windows of the lateral face of the body of the rail vehicle. The glazed panels 15 can be fixed by means of adhesive-bonding or using any other fixing means known to the person skilled in the art.
The outer skin 10 may include a metal plate, for example, of thin aluminium or steel, shaped so as to have curvature which corresponds to the curvature desired for the lateral face of the rail vehicle body, and also including the openings which are intended to form the windows and the door. The outer skin 10 may also include a plate of composite material which is reinforced with fibres, which is thin and which includes cut-outs which correspond to the openings. The skin may further include a sheet which includes cut-outs which are suitable for producing openings of the lateral face of the rail vehicle body. This outer skin is thin and is adhesively-bonded to the inner framework 1 in order to form a sealed and very rigid assembly.
The inner framework 1 is, as set out, includes panels which will be described in greater detail below. Each of these panels includes ribs which are intended to provide the rigidity thereof. In particular, with the exception of the panel 8 which is intended to receive a door, the panels include ribs in a diagonal line on the lower and upper portions thereof which provide rigidity, both in the direction of the length and in the transverse direction. These panels include a plate of a composite material or of metal, shaped in order to form hollow ribs which delimit cells. The ribs are formed so as to protrude on the inner side of the lateral face of the body of the rail vehicle, in such a manner that the outer skin comes into contact with the base of the cells which are delimited by the ribs. The bases of the cells form relatively large surfaces which allow good adhesive-bonding of the outer skin 10 to the inner framework 1.
The panel 8 which is intended to receive a door, includes an upper horizontal rib 80 which forms the lintel, a lower horizontal rib 81 which forms the threshold of the door and two vertical ribs 82 which include the pillars of the door and which are suitable for providing the connection to the adjacent panels 4 and 6′.
These panels include shells whose wall is thin and solid.
When the panels are produced from plastics material or composite material, such as, for example, a fabric of glass fibre impregnated with resin, the panels are produced by means of moulding.
When these panels are of metal, and, for example, of aluminium, they may be produced by means of cutting and pressing.
A central panel 2 will now be described. A panel of this type, which is illustrated in
The lower semi-panel 24 and upper semi-panel 25 are solid portions which include an assembly of strengthening ribs. These strengthening ribs are, for the lower semi-panel 24, two branches 26 and 27 in a diagonal line which extend from the core 23 to a location near the lower corners of the lower semi-panel 24 and, for the upper semi-panel 25, two branches 28 and 29 which extend in a diagonal line from the core 23 to each of the corners or to a location near each of the corners of the upper semi-panel 25. These ribs form an X-shaped reinforcement structure which has the advantage of providing good rigidity both in the longitudinal direction and in the transverse direction whilst allowing the structure as a whole to remain light.
Furthermore, the assembly of reinforcement ribs of the panel 2 includes, on the one hand, upper ribs 30 which surround the half-windows, and lower ribs 31 which surround the half-windows. The upper ribs 30 and lower ribs 31 and the core 23 form ribs which surround the half-window 21 or 22.
The vertical ends of the panel 2 also include vertical ribs 32 at one of the ends and ribs 33 at the other end (that is to say, ribs or rib portions), the ribs of one of the ends having a shape which complements the ribs of the other end, so that the ribs of one end of a panel are able to co-operate with the ribs of the other end of an adjacent panel in order to allow the connection between two adjacent panels. Two adjacent panels are fixed to each other by means of adhesive-bonding, riveting, bolting, adhesive-bonding and riveting, adhesive-bonding and bolting, clinching, or welding, depending on the type of material from which the panels are made and depending on the embodiment desired for the lateral face of the rail vehicle body. Any suitable fixing means known to the person skilled in the art can be used.
The ribs together delimit cells 34, 35, 36, 37, 38, 39 whose concavities face the inner side of the rail vehicle body. These cells can receive thermally or phonically insulating materials 130, for example, rock wool or felt, or any other material known to the person skilled in the art. The cells can be closed by one inner covering wall 120 which can be arranged on the inner face of the lateral face of the rail vehicle body when the inner covering wall 120 is mounted.
The ribs, in particular the ribs 23, 26, 27, 28 and 29 which form an X-shaped structure, are closed by the outer skin of the lateral face of the body of the rail vehicle. The ribs thus include conduits which are able to receive ventilation sheaths or heating sheaths or fluid distribution circuits or cables for electrical distribution or for transmitting any type of signal.
A panel 4 will now be described for connection between a panel 8 which is intended to receive a door and a central panel 2 of a rail vehicle body lateral face.
The connection panel 4, illustrated in
As in the above case, the ribs together delimit cells 50, 51, 52, 53, 54 which can receive thermally or phonically insulating materials.
An end panel 6 of a rail vehicle body lateral face will now be described. This panel 6, which is illustrated in
Finally, on the edge of the panel opposite the rib which is intended to co-operate with a body end structure, the panel includes vertical ribs or rib portions 68 and 69 which extend, on the one hand above and, on the other hand, below the recess 61. These vertical ribs 68 and 69 are intended to co-operate with complementary ribs of a central panel.
As in the above case, the ribs together delimit cells or chambers 70, 71, 72 and 73, 74 and 75 which can receive sheets of thermally or phonically insulating material.
These panels are intended, as in the above case, to be assembled with adjacent panels in order to complete the shape of the rail vehicle. It should be noted that it may be necessary to design left-hand panels and right-hand panels depending on whether a left-hand lateral face or a right-hand lateral face of a rail vehicle body is being produced. However, the person skilled in the art knows how to adapt the shape of these panels to the structure he wishes to produce.
The panel 8 which is intended to receive a door includes only ribs which are intended to form the lateral pillars, the threshold and the upper cross-member of the door.
In a first production variant illustrated in
In a second production variant, illustrated in
In a third production variant which is illustrated in
All these ribs delimit openings 34′″ and 35′″ and form a skeleton to which the outer skin 10′″ is adhesively-bonded.
Furthermore, in the spaces delimited by the ribs, longitudinal reinforcement beams 130′″ which have a T-shaped cross-section, are adhesively-bonded to the skin and are fixedly joined to the panel 2′″ by the ends thereof.
All the panels which have been described above may be any type of suitable material, and in particular materials which have already been mentioned. The panels can be produced using methods of moulding or pressing or can be mechanically welded. The panels may be shells which have thin walls and which include hollow ribs. The hollow ribs are open over the entire length thereof and include channels or chutes which can receive network elements for distribution of fluid, electricity or any type of signal. The spaces which are delimited by the ribs can be recessed, the panels then being skeletons. However, preferably, with the exception of the recesses which correspond to the openings such as windows, the spaces delimited by the ribs define cells whose bases include surfaces which allow effective adhesive-bonding of the outer skin.
By assembling panels as they have been described above, in particular a specific number of panels of the central type, and by complementing them at each end either with end panels or with door frame panels, it is possible to produce a framework for a lateral face of a rail vehicle body having the desired length. It is also possible, by arranging connection panels between central panels and panels of the door pillars, to arrange doors at a specific location over the length of the lateral face of the vehicle body, in particular a door may be half-way along or, on the other hand, close to one of the ends.
The two lateral faces of a body are almost symmetrical, relative to a plane, and cannot be superimposed. Consequently, it may be necessary to produce panels which are intended to produce a right-hand lateral face and panels which are produced for a left-hand lateral face. However, the person skilled in the art will know how to adapt the shape of the panels to what is required in order to be able to produce the two lateral faces of the rail vehicle body.
As will be appreciated, when a framework of a lateral face of a rail vehicle body has been produced by assembling panels and fixing them together by means of connection ribs, by means of welding, by means of riveting or adhesive-bonding, the lateral face is completed by adhesively-bonding the outer skin to the framework after having, if necessary, arranged in the ribs the networks which are intended to be concealed at that location. This outer skin thus provides excellent joining between all the panels and very effective sealing.
All the glazed panels 15 which are attached to the lateral face of the rail vehicle body in order to close the openings which correspond to the windows can also be positioned by means of adhesive-bonding or any other fixing means which are known to the person skilled in the art.
This embodiment of a lateral face of a rail vehicle body has the advantage, on the one hand, of being able to be adjusted, and, on the other hand, of allowing light faces to be constructed which are nonetheless very rigid and which have a good outward appearance and good sealing.
Since this method is suitable for producing rail vehicle faces for different models, using the same panels, it is possible to reduce production costs.
Preferably, the outer skin extends over the entire length of the lateral face of the rail vehicle body. However, the significant factor is that each connection between two adjacent panels is covered by the outer skin in order to seal this connection and strengthen the mechanical connection between the two panels. Therefore, in some configurations, the skin may extend over only a portion of the length of the lateral face.
Furthermore, in order to provide a good level of mechanical strength, in particular in terms of fatigue, of the lateral face, the connection of two adjacent panels must not open in a zone of concentrated stress which corresponds to an irregularity in terms of shape of the lateral face. To this end, it is preferable for the panels to extend over the entire height of the lateral face.
In particular, owing to the design of the panels as described above, any opening is delimited by a maximum of two panels and the connection between two central panels which delimit a window is formed in the centre of the windows and not in the corners of the windows which are zones of concentrated stress, that leads to better mechanical strength for the walls in the region of the corners of the windows. These zones are inside panels and their shapes can be adapted in order to provide the best mechanical behaviour possible for the window corners. This results in better strength for the rail vehicle body lateral faces.
The panels as they have been described above may include one possible embodiment of the panels for producing rail vehicle body lateral faces. However, the person skilled in the art will appreciate that he can produce panels having different shapes, including sheets which are shaped so as to have hollow reinforcement ribs which protrude towards the inner side of the body of the rail vehicle and which preferably together delimit cells whose faces form large surfaces to provide effective adhesive-bonding of an outer skin, the cells being able to receive insulating materials. The person skilled in the art will know how to select the rib shape suitable for producing reinforcement structures which may or may not be triangular. He will also know how to select the most suitable material and assembly method in each case.
Finally, the person skilled in the art will appreciate that he can produce, using the technique which has been described above, rail vehicle body lateral faces which do not include openings over the entire length thereof or which do not even include any openings at all.
To this end, it is sufficient for the outer skin not to include any opening in the zones in question and for the reinforcement panels to be optionally adapted as a result.
The person skilled in the art will also be able to provide panels which do not extend over the entire height of the lateral face of the rail vehicle and which include, for example, horizontal connections. However, preferably, these connections must not open in zones of concentrated stress.
| Number | Date | Country | Kind |
|---|---|---|---|
| 06 04957 | Jun 2006 | FR | national |
