EP3666617B1 - Double-walled envelope structure for a cart box - Google Patents

Description

The invention relates to an enveloping structure for a car body for a vehicle and a method for producing an enveloping structure.

Shell structures of car bodies are often formed from double-layer structures such as double-walled aluminum extrusions. Such an envelope structure is shown, for example, in DE 10 2011 088 509 B4 . In the case of aluminum car bodies, the double-walled structure ensures sufficient strength and low weight at the same time. For this purpose, the outer and inner walls of the extruded aluminum profiles are usually connected to one another via struts, which transfer the forces introduced into the enveloping structure or distribute them to the outer and inner walls.

The enveloping profiles are manufactured in the required length using an extrusion process and then placed on top of one another and welded together to produce the enveloping structure, i.e. the car body floors, walls and ceilings. Due to the double-walled design of the extruded aluminum profiles, it is necessary for both the outer and inner walls of the enveloping profiles placed on top of each other to be connected to one another in a force-conducting manner. This can be achieved via welds, which are applied to both the outside and the inside of the car body during manufacture of the car body, or via glued joints, as in FIG DE 10 2011 088 509 B4 described.

The rigidity of the car body is reduced by cutouts in the car body, which are provided for example for windows and doors. In order to compensate for the lower strength associated with this, the wall thicknesses of the enveloping profiles used can be increased. Production by extrusion usually results in constant cross-sections. Consequently, the wall thickness can only be changed over the entire length of an enveloping profile. However, this leads to an increased cost of materials and thus weight of the car body. Alternatively, additional supporting components can be welded on to increase rigidity, which means that the cost of manufacturing the car body is significantly greater.

From the JP H11 59413 A a shell structure for a vehicle with a shell structure-reinforcing weld is known. From the JP H11 59412 A and the EP 1 118 521 A1 are envelope structures known for vehicles with a reinforcing body inserted into a cavity of the enveloping structure.

The invention is therefore based on the object of creating an enveloping structure which can be produced simply and inexpensively and which has a high level of strength and low weight.

According to the invention, this object is achieved with an enveloping structure according to claim 1 . Furthermore, the object is achieved with a method according to claim 13 and a stiffening element according to claim 15. Advantageous developments of the invention are contained in the dependent claims.

According to the invention, the object is achieved in that the enveloping structure has at least one enveloping profile with an inner wall, an outer wall and a strut connecting the inner wall and the outer wall, with a stiffening element which stiffens the enveloping structure at least in sections being provided and which is introduced in a form-fitting manner between the outer wall and the inner wall and wherein the stiffening element encompasses the strut.

The invention thus makes it possible to use enveloping profiles with lower wall thicknesses and still achieve sufficient strength. The higher strength is achieved through the supporting effect of the stiffening element used. The stiffening element enables a more direct transmission of force between the inner and outer wall and supports them against each other.

The term enveloping structure refers to the structure of the outer shell of a rail vehicle. This can include car body floors, walls and/or ceilings and be formed by one or more enveloping profiles. The shell structure can have the actual outer shell, structural elements such as struts and/or an inner shell.

The enveloping profile can be formed from several extruded profiles that are welded together. The welding process preferably takes place before the stiffening element is inserted.

According to a preferred embodiment of the invention, during operation, supporting forces acting between the stiffening element and the at least one enveloping profile can be transmitted essentially in a form-fitting manner. For this purpose, the stiffening element can have bearing surfaces on adjacent surfaces of the enveloping profile. The stiffening element can rest on at least four, preferably on five, most preferably on seven bearing surfaces on the enveloping profile. The stiffening element preferably extends into areas of the enveloping profile in which relatively large forces or moments occur.

In a preferred variant of the invention, the stiffening element rests against the inner wall or the outer wall of the enveloping profile. According to an expedient development of the invention, the stiffening element can bear against the inner wall and the outer wall. Thus, direct power transmission between the inner and outer wall is possible.

In a further variant, the stiffening element can have at least two force transmission surfaces which are arranged on essentially opposite sides of the stiffening element. The stiffening element can be designed for insertion into a receiving space in the enveloping structure, with the receiving space bearing against several surfaces when the stiffening element is inserted. The enveloping structure can be formed by extruded profiles. Correspondingly, the receiving space can be formed by one or more, in particular double-walled, extruded profiles.

The enveloping structure is preferably formed from extruded aluminum profiles. Cavities in the extruded aluminum profiles form the receiving space.

According to a further variant of the invention, at least three force transmission surfaces can be provided. The three force transmission surfaces can each run essentially orthogonally to a common plane of force action, in order to be able to absorb forces and moments from different directions that lie essentially on a common plane of force action. The plane of action of the force ideally runs parallel or tangential to the outer shell of the shell structure. The plane of action of the force is thus a plane that is spanned by force vectors acting in the enveloping structure.

In another expedient development, the stiffening element can have at least one seat for a strut that reinforces the outer shell of the car body, and the seat can have at least one force transmission surface on its inside to enable force transmission in other directions. The stiffening element preferably has at least one receptacle for a strut that reinforces the enveloping structure of the car body, and the receptacle preferably includes at least one force transmission surface on its inside.

At least one strut connecting the inner wall and the outer wall is provided in the enveloping profile, with the stiffening element encompassing the strut. The strut can thus serve as a further form-fitting means that reinforces the form-fitting connection with the enveloping profile. In particular, a displacement of the stiffening element in the enveloping profile can be blocked by the further form fit.

In an expedient development of the invention, at least two struts are provided, which lie against the stiffening element on opposite sides of the latter. In this way, the stiffening element can be positively secured against displacement in two directions.

One or both struts can engage in the stiffening element or be surrounded by it in order to optimize the form fit between the stiffening element and the enveloping profile. Thus, tensile forces or bending moments can also be transmitted via the stiffening element.

Ideally, the struts run parallel to one another, so that the stiffening element can be pushed into the enveloping profile in an insertion direction. The insertion direction can correspond to an extrusion direction of the enveloping profile.

The struts can preferably run continuously from the inner wall to the outer wall. In addition, the struts ideally run in an extrusion direction, with the insertion direction corresponding to the extrusion direction.

In a further embodiment of the invention, at least three struts can be provided, each of which bears against one side of the stiffening element and/or engages in the stiffening element. Thus, forces can be transmitted on more than two levels.

According to a preferred variant of an envelope structure according to the invention, the stiffening element is made of a composite material (composite, aluminum foam...). The stiffening element can in particular be formed from a fiber composite material, such as a carbon fiber or glass fiber composite material. This enables high strength and low weight at the same time. Alternatively, the stiffening element can be formed from aluminum, in particular from foamed aluminum.

The stiffening element can be designed so that it can be molded into the enveloping profile. In a non-hardened state, the stiffening element can have slightly larger dimensions than a receiving space between the inner and outer wall provided for receiving the stiffening element. When inserting the stiffening element, it can be slightly compressed in order to achieve a complete positive fit between the stiffening element and the enveloping profile in the hardened state.

The enveloping structure can have a cutout. The cutout may be provided in a side wall area, an end wall area, a roof area and/or a floor area. The cutout can in particular be a door cutout and/or a window cutout and/or a cutout for an air conditioning system. In this case, the stiffening element can adjoin the cutout. In this way, the enveloping structure is stiffened, particularly in the edge area of the cutouts, and deformations of the enveloping structure are blocked.

In a further embodiment of the invention, the stiffening element can border or delimit the cutout at least in sections. The stiffening element can at least partially form a frame of the cutout, in particular a window frame. In further configurations, the stiffening element can form a door frame. The stiffening element can be used at penetrations in the enveloping structure, for example at a penetration for an air duct. The stiffening element can form sealing surfaces on bushings in order to ensure the best possible sealing of the car body.

A filling material can be provided between the stiffening element and the enveloping profile in order to close gaps between the enveloping profile and stiffening element or to smooth out unevenness on the contact surfaces. The filling material is ideally incompressible in a hardened state. The filling material can be formed at least partially from a duroplastic and/or quartz sand.

According to a further variant of the invention, the stiffening element can be adhesively connected to the inner wall, outer wall or the strut. An adhesive can be used to connect the stiffening element to the enveloping profile. Alternatively, in a composite stiffener, the matrix material can serve as an adhesive. For example, the material of the stiffening element can comprise a duroplast, which hardens only when the stiffening element is inserted into the enveloping profile and connects it to the enveloping profile.

In the case of a car body with an enveloping structure according to the invention, this can form a side wall, a roof and/or a floor of the car body.

According to a method for producing an enveloping structure according to the invention, an enveloping section is first formed from enveloping profiles, an enveloping profile having an inner wall, an outer wall and at least one strut connecting the inner wall and the outer wall. Several enveloping profiles can be connected to one another, in particular welded, in order to form the enveloping section. Then a Stiffening element are inserted into a receiving space of the enveloping portion, wherein the stiffening element engages around the strut. The stiffening element can preferably be introduced into the enveloping section in the extrusion direction.

Remaining intermediate spaces such as gaps between the stiffening element and the enveloping section can be filled with a filling material during the insertion of the stiffening element. For this purpose, the stiffening element can be provided or coated with filling material before it is inserted. Alternatively, gaps can be filled with a filling material after the stiffening element has been inserted.

In a further variant of the method according to the invention, the stiffening element can be glued into the receiving space in order to be able to additionally transmit forces via an adhesive connection. The filling with filling material and the gluing can be carried out at the same time, in that the filling material also serves as an adhesive. The filling material can be formed from a duroplast. The filling material can contain an incompressible filler such as quartz sand to fill larger volumes.

According to one embodiment of a stiffening element according to the invention, the stiffening element is provided with at least one force transmission surface, with a distribution system having at least one distribution channel for distributing a filling material that is liquid in a processing state along the force transmission surface being provided in the stiffening element. A filling material can thus also be conveyed to the force transmission surface when the stiffening means is in the installed state, i.e. the production of an enveloping structure stiffened with the stiffening element is significantly simplified.

An enveloping structure that is reinforced with a stiffening element according to the invention preferably has an accommodation space in which the stiffening element can be accommodated. In this case, inner walls of the receiving space serve as contact surfaces or force transmission surfaces for the stiffening element.

In a preferred embodiment of the stiffening element, at least one force transmission surface is provided with an elevation on its edge at least in sections. The elevation can, for example, be part of the base body of the stiffening element or be formed by a web formed by the material of the base body of the stiffening element. The increase can be on the enveloping profile or an inner wall of the receiving space rest and thus serve to set a defined distance between the force transmission surface and the enveloping profile. A defined and uniform joint width can thus be set in the area of the force transmission surface. Slight unevenness can be compensated for by the defined gap between the force transmission surface and the enveloping profile. The elevation can serve as a flow barrier to keep filling material in gaps between the force transmission surface and inner walls of the receiving space on the force transmission surface. In this way, the amount of filling material to be used can also be predetermined more precisely.

Alternatively or additionally, the stiffening element can be provided with a seal which at least partially surrounds the force transmission surface. The seal can be formed by an elastic sealing lip, by which liquid filling material is held on the force transmission surface when the stiffening element is installed.

The distribution system can have a filling opening into which the filling material can be introduced. The filling opening can have a connection device to which a filling device can be connected. The connection device can have a form-fitting element for form-fitting fastening of the filling device, for example a thread or a web or depression for latching with a latching element. This means that the filling material can be fed into the distribution system at increased pressure.

In a further preferred embodiment, the distribution system has at least one opening which is arranged on the at least one force transmission surface and forms an opening of the distribution channel. The filling material can thus be transported directly to the force transmission surface via the distribution system. Furthermore, a hydraulic pressure can be built up via the distribution system and a filling material that is still liquid in a processing state and is located in the distribution system. It is thus possible to align the position of the stiffening element using hydraulic pressure in the distribution system.

According to a preferred embodiment of the invention, the distribution channel penetrates the stiffening element. This allows the filling material to be transported via the distribution channel to a number of sides of the stiffening element or to force-transmitting surfaces which are opposite one another with respect to the stiffening element.

The distribution channel can be formed at least in sections as a depression on the stiffening element and can extend along a surface of the stiffening element. A section of the distribution channel designed as a depression can extend in particular along a force transmission surface. The filling material can thus be conveyed along the distribution channel onto the force transmission surface.

In a further embodiment of the invention, the distribution system can comprise a distribution channel connecting at least two distribution channels in order to improve the distribution of the filling material.

According to an expedient development of the invention, the distribution system has a filling opening which is accessible from the outside when the stiffening element is in the assembled state and which is connected to the at least one distribution channel.

The filling material is preferably formed from a material that can be conveyed through the distribution system. Preferably, the filler material is liquid at room temperature in a processing state. The filling material can be designed to be essentially liquid at room temperature and hardening essentially at room temperature. The filling material can be formed from a polymer which is designed to be crosslinkable at room temperature. The filling material can in particular be designed to be formable and hardenable without the effect of temperature. The filling material can preferably be formed from a duroplastic.

In order to also be able to manufacture the stiffening element with distribution channels in complex geometries, the stiffening element can be produced using the 3D printing process. The distribution channels can have undercuts and/or a curved course in sections.

An enveloping structure according to the invention for the car body of a rail vehicle comprises an accommodation space for accommodating a stiffening element.

The stiffening element can be designed in particular for use in double-walled enveloping structures, in particular for enveloping structures formed from extruded aluminum profiles. The enveloping structure can correspondingly have at least one enveloping profile with an inner wall and an outer wall, wherein the stiffening element can be introduced in a form-fitting manner between the outer wall and the inner wall.

A method according to the invention for assembling a stiffening element comprises the following steps: First, the stiffening element is inserted into a receptacle or a receptacle space of an enveloping structure. With the insertion of the stiffening element, a form fit between the stiffening element and the enveloping structure can already be produced.

The distribution channel is then filled with a filling material. Pressure can be built up via the distribution channel or the filling material can be conveyed into the distribution channel under pressure.

After the distribution channel has been filled, the filling material emerges at openings or ends of the distribution channel. The distribution channel is then filled again until the cavities remaining between the force transmission surfaces and the inner walls of the receptacle or the receptacle space are filled with the filling material.

A stiffening element can preferably be pushed into an enveloping profile in the area of a window corner. The position of the stiffening element can be defined and/or fixed by sliding it onto one or more struts in the enveloping profile. Adhesive can then be distributed between the force transmission surface and the enveloping profile by filling the distribution system with adhesive.

character description

• Fig. 1 einen Ausschnitt einer Hüllstruktur für ein Schienenfahrzeug;
• Fig. 2 eine Schnittansicht gemäß der Stelle A-A der Hüllstruktur der Fig. 1;
• Fig. 3 eine Schnittansicht gemäß der Stelle B-B der Fig. 2;
• Fig. 4 eine Perspektivansicht des in Fig. 3 gezeigten Ausschnittes der Hüllstruktur;
• Fig. 5 eine Schnittansicht eines weiteren Ausführungsbeispiels einer Hüllstruktur, gemäß der Stelle A-A der Hüllstruktur der Fig. 1;
• Fig. 6 eine Schnittansicht gemäß der Stelle B-B der Fig. 5

The accompanying drawings illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. Show it:

• 1 a section of an enveloping structure for a rail vehicle;
• 2 a sectional view according to the point AA of the shell structure 1 ;
• 3 a sectional view according to point BB 2 ;
• 4 a perspective view of the in 3 shown section of the enveloping structure;
• figure 5 a sectional view of a further exemplary embodiment of an enveloping structure, according to point AA of the enveloping structure of FIG 1 ;
• 6 a sectional view according to point BB figure 5

The following is with reference to the Figures 1 to 4 a preferred embodiment of the enveloping structure according to the invention is described.

1 shows a section of an enveloping structure 1, which forms a side wall of a rail vehicle. The enveloping structure 1 can be formed by a multiplicity of enveloping profiles, some of which are placed on top of one another in a form-fitting manner and are welded to one another on their inner and/or outer sides. The outside of the enveloping structure forms the outer shell 25, which can be formed from the outsides of a large number of enveloping profiles. The enveloping structure 1 is part of a car body for a passenger vehicle. Correspondingly, the enveloping structure 1 has cutouts 10, 11, 12, 13, which are used to form entrances and windows. The cutouts 11, 12, 13 form windows of the car body, the cutout 10 an access.

In the area of the cutouts 10, 11, 12, 13, the flow of forces in the enveloping structure 1 is disturbed. In particular in the corner areas of the cutouts 10, 11, 12, 13, increased stresses thus arise, which place particular strength requirements on the enveloping structure 1. In the in the Figures 1 to 4 described embodiment is therefore provided in the corner areas each have a stiffening element.

In the sectional view of 2 FIG. 1 is a cross-section of the enveloping structure 1 at point AA of FIG 1 shown. The enveloping structure 1 is formed by an enveloping profile 2 . The enveloping profile 2 has an inner wall 3 and an outer wall 4 . Between the inner wall 3 and the outer wall 4 there are struts 5, 7, 9, which connect the inner wall 3 and the outer wall 4 to one another and support one another. At the same time, the struts 5, 7, 9 form a receiving space 14. All the struts 5, 7, 9 were produced in an extrusion process for the production of the enveloping profile 2 and extend in an extrusion direction S.

A stiffening element 6 is inserted between the inner wall 3 and the outer wall 4 and is held in the receiving space 14 in a form-fitting manner by the inner wall 3 and the outer wall 4 and by the struts 7 , 9 . The stiffening element 6 is inserted into the receiving space 14 in accordance with the course of the adjoining struts 7 , 9 . The stiffening element 6 is thus pushed into the receiving space 14 in an insertion direction E, which corresponds to the extrusion direction S.

3 shows a sectional side view of the detail of FIG 2 . The stiffening element 6 borders on the cutout 12 . The surface of the stiffening element 6 adjoining the cutout 12 follows the course of the cutout 12 or the surface of the stiffening element 6 adjoining the cutout 12 is flush with the edge of the cutout 12.

The stiffening element 6 has bearing surfaces 16, 17 on which the stiffening element 6 rests on struts 7, 9. The bearing surfaces 16, 17 run parallel to the flanks of the struts 7, 9 and thus offer the possibility of a two-dimensional force transmission. The stiffening element 6 rests on its upper side with the bearing surface 17 on the strut 7 and on its underside with the bearing surface 16 on the strut 9 . Between the two struts 7 and 9 a transmission of moments is thus possible.

On a side of the receiving space 14 facing away from the cutout 12, another strut 8 is provided which, like the other struts 7, 9, runs in the extrusion direction S and connects the inner wall 3 to the outer wall (not shown here). The stiffening element 6 is provided with a slot 15 in which the strut 8 is received. The slot 15 ideally borders the strut 8 on both sides. The strut 8 is thus encompassed by the stiffening element 6 or the strut 8 engages in the stiffening element 6 . Consequently, tensile forces can be transmitted transversely to the extension of the strut 8 via the form fit. Furthermore, the transmission of torques is possible, in particular in a direction perpendicular to the insertion direction E. The positive connection between the stiffening element 6 and the enveloping structure 1 or the enveloping profile 2 is thus supplemented by the strut 8 .

4 shows the section of the enveloping structure 1 according to FIG 2 and 3 in a perspective view. The width of the stiffening element 6 corresponds approximately to the width of the receiving space 14 , the stiffening element 6 thus rests directly on the inside of the inner wall 3 and on the inside of the outer wall 4 . The receiving space 14 is delimited at the top by the strut 7 and at the bottom by the strut 9. The strut 8 forms a stop in the direction of insertion E. It limits a movement of the stiffening element 6 in the direction of insertion E and thus simplifies the assembly of the stiffening element 6.

Contrary to the direction of insertion E, in the direction of the cutout 12 , the stiffening element 6 has the contour of the cutout 12 . The inner wall 3 and the outer wall 4 are thus in supported seamlessly against each other in this area. The stiffening element 6 also forms a window frame in sections.

In the sectional view of figure 5 1 is an alternative cross-section of the enveloping structure 1 at location AA of FIG 1 shown. The extrusion direction corresponds to a longitudinal direction of the rail vehicle. Force-transmitting surfaces 26 , 27 , 21 , 22 are arranged on the stiffening element 6 , each cooperating in a force-transmitting manner with inner surfaces of the receiving space 14 of the enveloping profile 2 . When the stiffening element 6 is inserted, the force transmission surfaces 26, 27, 21, 22 support the inner walls of the enveloping profile 2 against one another and thus lead to a stiffening of the enveloping profile 2.

Due to manufacturing tolerances, cavities such as e.g. gaps can remain between the inner walls of the receiving space 14 and the stiffening element 6, which disrupt the form fit between the stiffening element 6 and the enveloping profile 2. In order to fill such cavities and thus optimize the transmission of force between the stiffening element 6 and the enveloping profile 2, filling with a pressure-resistant filling material is provided.

In order to be able to convey the filling material into the cavities, the stiffening element 6 is equipped with a distribution system 18 for distributing the filling material between the stiffening element 6 and the inner surfaces of the receiving space 14 . For this purpose, the distribution system 18 comprises a multiplicity of distribution channels 19 , 20 for distributing the filling material to the force transmission surfaces 26 , 27 . The longitudinal plane is essentially defined by the x and z axes of the vehicle coordinate system. Furthermore, distribution channels 20 are provided, which guide the filling material essentially in a transverse direction, ie along the y-axis of the vehicle coordinate system. All distribution channels 19, 20 are connected to one another. In this case, distribution channels 19 connect two or more distribution channels 20 to one another. The filling material can thus be fed to the distribution system 18 of the stiffening element 6 through only one feed opening.

The distribution system 18 has a large number of openings 23 which are arranged on the force transmission surfaces 26, 27, 21, 22 and each form an opening of a distribution channel 19, 20. The filling material can thus be transported via the distribution system 18 directly to the force transmission surfaces 26, 27, 21, 22. Furthermore, via the distribution system 18 and a filling material in the distribution system 18 that is still liquid in a processing state, a hydraulic pressure can be built up in order to also be able to fill relatively far-reaching gaps and more distant cavities with filling material.

6 shows a sectional side view of the detail of FIG figure 5 . The stiffening element 6 borders on the cutout 12 . The surface of the stiffening element 6 adjoining the cutout 12 follows the course of the cutout 12 or the surface of the stiffening element 6 adjoining the cutout 12 is flush with the edge of the cutout 12.

The stiffening element 6 has further force transmission surfaces 26, 27 on which the stiffening element 6 rests on struts 7, 9. The force transmission surfaces 26, 27 run essentially orthogonally to the force transmission surfaces 21, 22. The force transmission surfaces 26, 27 run parallel to the flanks of the struts 7, 9 and thus offer the possibility of a two-dimensional force transmission. The stiffening element 6 rests on its upper side with the force transmission surface 27 on the strut 7 and on its underside with the force transmission surface 26 on the strut 9 . Between the two struts 7 and 9 a transmission of moments is thus possible.

On a side of the receiving space 14 facing away from the cutout 12, another strut 8 is provided which, like the other struts 7, 9, runs in the extrusion direction S and connects the inner wall 3 to the outer wall (not shown here). The stiffening element 6 is provided with a receptacle 33 in which the strut 8 is accommodated. The receptacle 33 ideally borders the strut 8 on both sides. The strut 8 is thus encompassed by the stiffening element 6 or the strut 8 engages in the stiffening element 6 .

To improve the transmission of force between the stiffening element 6 and the enveloping profile 2, openings of the distribution system 18 are arranged on the force transmission surfaces 26, 27 and on the receptacle 33, at which distribution channels 19 open. Through this filling material can be promoted to the force transmission surfaces 26, 27, which forms an optimal form fit and/or an additional adhesive connection between the stiffening element 6 and the enveloping profile 2 in the hardened state.

In the figure 5 designated power transmission surface 21 is at least partially provided at the edge with an increase 24 at its edge, which in 6 is shown as a dashed line. A correspondingly designed increase, not shown here, is also on the force transmission surface 22 provided. The elevation 24 can, for example, be part of the base body of the stiffening element 6 and can be formed by the material of the base body of the stiffening element 6 .

The elevation 24 rests on the enveloping profile 2 or an inner wall of the receiving space 14 and is used to set a defined distance between the force transmission surface 22 and the enveloping profile. A defined and uniform joint width can thus be set in the area of the force transmission surface 22, which enables an optimal configuration of an adhesive connection. Slight unevenness can be compensated for by the defined gap between the force transmission surface 22 and the enveloping profile 2. The elevation 24 serves as a flow barrier in order to keep the filling material conveyed via the distribution system 18 onto the force transmission surface 22 in gaps between the force transmission surface 22 and inner walls of the receiving space 14 on the force transmission surface 22 .

The specific embodiments described and illustrated are not binding for the practice of the invention, but may be suitably modified within the scope of the present invention without departing from the scope of the present invention.

Reference List

E

insertion direction

S

extrusion direction

1

shell structure

2

envelope profile

3

inner wall

4

outer wall

5

strut

6

stiffening element

7, 8, 9

striving

10, 11, 12, 13

cutout

14

recording room

15

slot

16:17

bearing surface

18

distribution system

19, 20

distribution channel

21, 22

power transmission surface

23

opening

24

increase

25

outer shell

26, 27

power transmission surface

33

recording

Claims (15)

1. An enveloping structure (1) for a car body of a rail vehicle, comprising at least one enveloping profile (2), an inner wall (3) and an outer wall (4), wherein at least one strut (5, 7, 8, 9) connecting the inner wall (3) and the outer wall (4) is provided, wherein a stiffening element (6) stiffening the enveloping structure (1) at least in sections is provided, which stiffening element (6) is inserted between the outer wall (4) and the inner wall (3) in a positive-locking manner, characterized in that the stiffening element (6) surrounds the strut (8).
2. The enveloping structure (1) according to claim 1, wherein supporting forces acting during operation between the stiffening element (6) and the at least one enveloping profile (2) are transmittable substantially in a positive-locking manner.
3. The enveloping structure (1) according to any one of the preceding claims, wherein the stiffening element (6) abuts the inner wall (3) and/or the outer wall (4).
4. The enveloping structure (1) according to any one of the preceding claims, wherein at least two struts (5, 7, 8, 9) are provided which abut the stiffening element (6) on opposite sides of the stiffening element (6).
5. The enveloping structure (1) according to any one of the preceding claims, wherein at least three struts (5, 7, 8, 9) are provided, each of which abuts against one side of the stiffening element (6) and/or engages with the stiffening element (6).
6. The enveloping structure (1) according to any one of the preceding claims, wherein the stiffening element (6) is formed of a composite material.
7. The enveloping structure (1) according to claim 6, wherein the stiffening element (6) is formed of a composite or aluminum foam.
8. The enveloping structure (1) according to any one of the preceding claims, wherein the enveloping structure (1) comprises a cutout (10, 11, 12, 13), in particular a door cutout (10) and/or a window cutout (11, 12, 13) and/or a cutout for an air conditioning system, and the stiffening element (6) is adjacent to the cutout (10, 11, 12, 13).
9. The enveloping structure (1) according to any one of the preceding claims, wherein the stiffening element (6) surrounds the cutout (10, 11, 12, 13) at least in sections.
10. The enveloping structure (1) according to any one of the preceding claims, wherein the stiffening element (6) is adhesively connected to the inner wall (3), the outer wall (4) or the strut (5, 7, 8, 9).
11. A car body for a rail vehicle, characterized in that the car body comprises an enveloping structure (1) according to any one of the preceding claims.
12. The car body according to claim 11, wherein the enveloping structure (1) forms a side wall, a roof or a floor of the car body.
13. A method for manufacturing an enveloping structure (1) according to any one of claims 1 to 10, characterized by the steps:

    a. manufacturing an enveloping section out of enveloping profiles, wherein an enveloping profile comprises an inner wall (3), an outer wall (4), and at least one strut (5, 7, 8, 9) connecting the inner wall (3) and the outer wall (4),

    b. Subsequently inserting a stiffening element into a hollow space of the enveloping section, wherein the stiffening element (6) surrounds the strut (8).
14. The method according to claim 13, characterized in that the stiffening element is glued into the hollow space.
15. A stiffening element (6) for stiffening an enveloping structure (1) of a car body for a rail vehicle in a positive-locking manner, said enveloping structure comprising at least an enveloping profile (2), an inner wall (3), an outer wall (4) and a strut (8) connecting the inner wall (3) and the outer wall (4), wherein the stiffening element (6) comprises at least one force transmission surface (16, 17, 21, 22), characterized in that the stiffening element (6) comprises a distribution system (18) having at least one distribution channel (19, 20) for distributing a filling material, which is liquid in a processing state, along the force transmission surface (16, 17, 21, 22), wherein the stiffening element (6) comprises at least one receptacle (33) for the strut (8) reinforcing the enveloping structure (1) of the car body.

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