EP3950460A1 - Unterboden eines fahrzeugs, entsprechendes fahrzeug und zusammenbauverfahren - Google Patents

Unterboden eines fahrzeugs, entsprechendes fahrzeug und zusammenbauverfahren Download PDF

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Publication number
EP3950460A1
EP3950460A1 EP21189823.4A EP21189823A EP3950460A1 EP 3950460 A1 EP3950460 A1 EP 3950460A1 EP 21189823 A EP21189823 A EP 21189823A EP 3950460 A1 EP3950460 A1 EP 3950460A1
Authority
EP
European Patent Office
Prior art keywords
floor
longitudinal direction
panel
transverse
underbody
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21189823.4A
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English (en)
French (fr)
Other versions
EP3950460B1 (de
Inventor
Fabrice BENIZEAU
Cédric Laurencon
Guy RENAUD
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SpeedInnov SAS
Original Assignee
SpeedInnov SAS
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Filing date
Publication date
Application filed by SpeedInnov SAS filed Critical SpeedInnov SAS
Publication of EP3950460A1 publication Critical patent/EP3950460A1/de
Application granted granted Critical
Publication of EP3950460B1 publication Critical patent/EP3950460B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
    • B61F1/00—Underframes
    • B61F1/08—Details

Definitions

  • the invention also relates to a vehicle comprising at least one body comprising such a sill, as well as a method for assembling the sill.
  • the invention lies in the field of the manufacture of vehicle bodies, in particular the bodies of railway vehicle cars, and more precisely of the bottom of the body.
  • a railway vehicle generally comprises several cars mechanically connected together and comprising at least one motor provided with vehicle propulsion means.
  • Each car comprises a metal body mounted on wheels, generally offset on bogies located under the body.
  • the metal body is formed by assembling a sill, two side walls and a ceiling, arranged to form a tube structure, and two end closure walls. These elements are generally assembled by welding, in particular by electric arc welding, for example of the MIG type (for Metal Inert Gas, that is to say welding under neutral gas which does not react with the welded metal).
  • MIG type Metal Inert Gas
  • the bottom of the body is also assembled beforehand from several metal parts welded by electric arc.
  • the structure of the underbody comprises two longitudinal stretchers arranged on either side of the underbody, and a plurality of transverse beams connecting the two stretchers.
  • a sealing floor comprising one or more sheets is then placed under the transverse beams so as to close the underbody and form the floor of the car.
  • This manufacturing process can be improved. Indeed, it implements a large number of electric arc welds, which are difficult to automate and require many interventions on the assembly line.
  • welds are made using a process by adding material, and the additional mass added to the bottom of the body is not negligible.
  • the floor plates must be sized exactly to the dimensions of the underbody, which induces a low modularity of the process.
  • An object of the invention is therefore to provide a rocker panel manufactured according to a process that is simpler to automate, more modular, and requiring a reduced number of complex welds.
  • each floor element comprises a substantially rectangular plate and at least one beam elongated in the transverse direction, the plate and the beam being integral with the 'other.
  • Such a sill is of simple and modular manufacture, thanks to floor elements replacing both the transverse beams and the sealing floor and whose installation and assembly are simpler and can be automated.
  • the invention also relates to a vehicle comprising at least one body comprising a sill as described above.
  • a sill 10 according to the invention is shown in exploded view on the figure 1 .
  • the underbody 10 is intended to form part of a vehicle body, in particular in combination with two side walls, a ceiling and two transverse end walls.
  • the body base is more particularly intended to form the floor of the car.
  • the vehicle is in particular a railway vehicle comprising several cars each comprising such a body, the bodies being mounted on bogies carrying wheels.
  • the vehicle is a road vehicle, such as for example a bus with one or more boxes, or a commercial vehicle.
  • the longitudinal direction X extends along the direction of advance of the vehicle in normal operation.
  • the elevation direction Z is orthogonal to the longitudinal direction X and extends along a height of the vehicle.
  • the transverse direction Y is orthogonal to the longitudinal direction X and to the elevation direction Z and extends along the width of the vehicle.
  • substantially parallel means respectively “parallel”, “along” and “perpendicular” with a margin of angular error less than or equal to 10°, preferably less than 5°.
  • substantially equal is understood to mean “equal” with a margin of error less than or equal to 10% of the nominal value, preferably less than or equal to 5%.
  • the bottom of the body 10 comprises two stretchers 12 and a floor 14 arranged between the stretchers 12.
  • the stretchers 12 have elongated shapes in the longitudinal direction X, and are spaced from each other in the transverse direction Y, on either side of the floor 14.
  • the side rails 12 extend over the entire length of the underbody 10, in the longitudinal direction X.
  • the stretchers 12 have curved profiles in a plane YZ parallel to the transverse direction Y and to the direction of elevation Z, so as to join the floor 14 extending substantially in a transverse plane XY parallel to the longitudinal direction X and to the transverse direction Y and a side wall extending substantially in an elevation plane XZ parallel to the longitudinal direction X and to the elevation direction Z.
  • the XY plane is substantially horizontal and the XZ plane is substantially vertical.
  • each stretcher 12 has an upper edge 16 intended to be fixed to one of the side walls of the box, and a lower edge 18 fixed to the floor 14.
  • the floor 14 comprises a plurality of floor elements 20 aligned along the longitudinal direction X.
  • the floor 14 is formed by assembling a plurality of panels 22, each panel 22 comprising a plurality of floor elements 20 assembled in the longitudinal direction X, in particular between three and seven floor elements 20.
  • the floor 14 thus comprises four panels 22, including two panels 22 comprising six floor elements 20 and two panels 22 comprising five floor elements 20.
  • the floor 14 also comprises at least one crosspiece 24 connecting between the stretchers 12, each crosspiece 24 extending in the transverse direction Y along one of the panels 22 to which the crosspiece 24 is fixed.
  • each panel 22 is fixed to two crosspieces 24 which extend on either side of the panel 22 in the longitudinal direction X, so that each panel 22 is separated from the neighboring panel(s) 22 by crosspieces 24.
  • the floor 14 further comprises two crosspieces 24 located at its two ends in the longitudinal direction X.
  • a floor element 20 is shown in detail in the figure 2 .
  • the floor elements 20 are all identical to each other, which simplifies their manufacture and the management of parts stocks.
  • Each floor element 20 comprises a substantially rectangular plate 30 and at least one beam 32 elongated in the transverse direction Y, the plate 30 and the beam 32 being integral with one another.
  • the beam 32 and the plate 30 are two parts of the same part and are continuous with each other.
  • Each floor element 20 notably has a section of constant shape in any elevation plane XZ.
  • the floor elements 20 are manufactured by extrusion through the same die, so as to simultaneously form the plate 30 and the beam 32. This simplifies the manufacture of the floor elements 20 and increases reproducibility.
  • the beam 32 is a structure, in particular metal, of elongated shape in the transverse direction Y, which has for example a T-section, so as to have good resistance to torsion.
  • the beam 32 has an I, K, Z, or other section.
  • the beam 32 has a height H, measured along the elevation direction Z, for example between 3 cm and 10 cm.
  • the height H is chosen according to the desired stiffness of the floor 14, and in some cases may be less than 3 cm or greater than 10 cm.
  • the plate 30 is a flattened structure, in particular metallic, which extends on either side of the beam 32 in a transverse plane XY orthogonal to the direction of elevation Z.
  • the plate 30 extends for example from the foot of the T in the case where the beam 32 has a T section.
  • the plate 30 has a thickness E, measured along the elevation direction Z, for example between 1 mm and 10 mm, in particular between 1 mm and 3 mm.
  • the thickness E is chosen according to the desired strength of the underbody 10, and in some cases may be less than 1 mm or greater than 10 mm.
  • the plate 30 has a width L, measured along the longitudinal direction X, for example between 50 cm and 150 cm.
  • the width L of the plate 30 is equal to a total width of the floor element 20.
  • the beam 32 and the plate 30 have transverse lengths T, measured in the transverse direction Y, equal to each other, and comprised between 200 cm and 500 cm.
  • the transverse lengths T of the beam 32 and of the plate 30 constitute a transverse length of the floor element 20, and therefore of the floor 14.
  • the floor elements 20 are for example made of aluminum alloy. As a variant, the floor elements 20 are made from another metallic material capable of being shaped by extrusion and welded.
  • the picture 3 is a partial cross-sectional view of a panel 22 in an XZ section plane parallel to the longitudinal direction X and the elevation direction Z.
  • the floor elements 20 are fixed together by transverse weld beads 34 to form the panels 22.
  • Each transverse weld bead 34 extends between the plates 30 of two adjacent floor elements 20, in the transverse direction Y, over the entire transverse length T of each plate 30.
  • the transverse weld beads 34 are advantageously produced using a friction-stir welding process.
  • Friction-stir welding is a solid state welding process which consists of assembling two parts by bringing them into a pasty state thanks to a pin in rotation against the edges in contact and in translation along the weld bead at form.
  • transverse weld beads 34 formed by friction-stir welding have an outer surface 36 that is substantially planar, or even slightly concave, since the process is carried out without the addition of external material. This allows them to be visually distinguished from weld beads obtained by a process with addition of material, such as electric arc welding of the MIG type.
  • the transverse weld beads 34 are made from the top of the panel 22, so that the outer surface 36 extends over the top of the panel 22.
  • the figure 4 is a sectional view in a longitudinal plane XZ of two of the panels 22 and one of the crosspieces 24 of the floor 14, the crosspiece 24 being fixed to the two panels 22.
  • the crosspieces 24 are fixed to the panels 22 by intermediate weld beads 38, in particular produced by electric arc welding, for example according to a MIG type process.
  • the intermediate weld beads 38 formed by electric arc welding, that is to say with addition of material, have a curved outer surface 40 which makes it possible to distinguish them from a bead obtained by friction-mixing.
  • Each intermediate weld bead 38 is for example made from below the floor 14.
  • the curved outer surface 40 therefore extends over an underside of the floor 14.
  • the crosspieces 24 increase the rigidity of the floor 14 in the transverse direction Y.
  • the figure 5 is a sectional view of the floor 14 in a transverse plane YZ orthogonal to the longitudinal direction X.
  • the floor 14 is fixed to the stretchers 12 by longitudinal weld seams 42 extending in the longitudinal direction X.
  • the longitudinal weld seams 42 extend between the stretchers 12 on the one hand and each panel 22 and each crosspiece 24 of the floor 14 on the other hand.
  • the longitudinal weld beads 42 extend along the lower edges 18 of the side rails 12, over the entire length of the floor 14.
  • the longitudinal weld beads 42 are made in particular by electric arc welding, for example according to a MIG type process.
  • each longitudinal weld bead 42 is for example made from below the floor 14.
  • each longitudinal weld bead 42 has a curved outer face 44 extending over the underside of the floor 14.
  • the underbody 10 is arranged to receive a facing floor 50 covering the floor 14 to insulate and protect it and allowing circulation in the car and/or the support of objects placed in the car.
  • the floor elements 20 manufactured by extrusion in a die make it possible to easily modify the transverse length T of the floor 14.
  • the underbody 10 is easily modular manufacturing to the desired dimensions for the vehicle car.
  • floor elements 20 are all identical to each other, which simplifies their manufacture and the management of parts stocks.
  • the underbody 10 comprises a lower number of welds than the underbody of the state of the art, and in particular a lower number of welds made with an electric arc.
  • welds made by friction mixing are easier to automate and do not require the addition of material. The manufacture of the rocker panel 10 is therefore simplified and the rocker panel 10 has a lower total mass than the rocker panels of the state of the art.
  • the method comprises a preliminary step of producing the floor elements 20 by extrusion in a die.
  • Each floor element 20 is produced with an identical transverse length T, determined according to the desired width of the underbody 10 in the transverse direction Y.
  • the number of floor elements 20 produced depends on the desired length of the sill 10 along the longitudinal direction X.
  • the method comprises the production of between fifteen and thirty floor elements 20, in particular twenty-two floor elements 20 in the example represented in the figures.
  • the method includes another preliminary step of supplying the two stretchers 12.
  • the method then includes a step of assembling the floor 14.
  • the assembly of the floor 14 firstly comprises the manufacture of one or more panels 22, by welding the floor elements 20 aligned in the longitudinal direction X.
  • the floor elements 20 are fixed by transverse weld beads 34, in particular produced by friction-stir welding, extending between the floor elements 20 in the transverse direction Y.
  • the assembly of floor 14 includes the fabrication of two panels 22 comprising six floor elements 20 and two panels 22 comprising five floor elements 20.
  • the assembly of the floor 14 then comprises the assembly of the panels 22 together in the longitudinal direction X, with crosspieces 24 interposed between the panels 22.
  • the panels 22 are assembled to the crosspieces 24 by intermediate weld beads 38 produced by electric arc.
  • Crosspieces 24 are also assembled at the two ends of the floor 14 in the longitudinal direction X.
  • the method finally comprises a step of assembling the stretchers 12 on either side of the floor 14 in the transverse direction Y.
  • the stretchers 12 are fixed to the floor 14 by longitudinal weld beads 42, which extend between the lower edges 18 and the floor 14, in the longitudinal direction X.
  • the manufacturing process is easier to automate than pre-existing manufacturing processes, thanks to the use of friction stir welding.
  • the method is more flexible and simpler in terms of managing stocks of parts, thanks to the use of identical multiple floor elements.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
EP21189823.4A 2020-08-07 2021-08-05 Unterboden eines fahrzeugs, entsprechendes fahrzeug und zusammenbauverfahren Active EP3950460B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2008364A FR3113275B1 (fr) 2020-08-07 2020-08-07 Bas de caisse de véhicule, véhicule et procédé d’assemblage associés

Publications (2)

Publication Number Publication Date
EP3950460A1 true EP3950460A1 (de) 2022-02-09
EP3950460B1 EP3950460B1 (de) 2024-02-28

Family

ID=73013729

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21189823.4A Active EP3950460B1 (de) 2020-08-07 2021-08-05 Unterboden eines fahrzeugs, entsprechendes fahrzeug und zusammenbauverfahren

Country Status (2)

Country Link
EP (1) EP3950460B1 (de)
FR (1) FR3113275B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908823A1 (de) * 1979-03-07 1980-09-11 Messerschmitt Boelkow Blohm Tragelement zur verwendung in fahrzeugen, insbesondere schienenfahrzeugen
JPH0577722A (ja) * 1991-09-20 1993-03-30 Hitachi Ltd 車両構体
EP1832491A2 (de) * 2006-03-06 2007-09-12 Siemens Transportation Systems GmbH & Co KG Schienenfahrzeug mit einem Untergestell
US20190144011A1 (en) * 2018-09-06 2019-05-16 Crrc Qingdao Sifang Co., Ltd. Chassis Component of Railway Vehicle, and Railway Vehicle

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908823A1 (de) * 1979-03-07 1980-09-11 Messerschmitt Boelkow Blohm Tragelement zur verwendung in fahrzeugen, insbesondere schienenfahrzeugen
JPH0577722A (ja) * 1991-09-20 1993-03-30 Hitachi Ltd 車両構体
EP1832491A2 (de) * 2006-03-06 2007-09-12 Siemens Transportation Systems GmbH & Co KG Schienenfahrzeug mit einem Untergestell
US20190144011A1 (en) * 2018-09-06 2019-05-16 Crrc Qingdao Sifang Co., Ltd. Chassis Component of Railway Vehicle, and Railway Vehicle

Also Published As

Publication number Publication date
FR3113275B1 (fr) 2023-02-24
FR3113275A1 (fr) 2022-02-11
EP3950460B1 (de) 2024-02-28

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