Bogie pin between bogie and wagon underframe of a rail vehicle

Abstract

A bogie pin (1) for a flexible coupling of a bogie (16) to a wagon underframe (15) of a rail vehicle is described. The bogie pin (1) comprises two mutually oppositely arranged, flat rib structures (5) which each have a foot portion (5a) and a shaft portion (5b), a prism-shaped solid structure (22), which is arranged between the two shaft portions (5b) of the two flat rib structures (5) and is connected fixedly thereto, and a connecting rib (21), which is arranged between the two foot portions (5a) of the two rib structures (5) and is fixedly connected to the two flat rib structures (5) and the prism-shaped solid structure (22). A chassis (14) for a rail vehicle is also described. A rail vehicle is additionally described. In addition, the invention describes a method for producing a bogie pin (1).

Description

[0001] Description

[0002] Pivot pin between bogie and wagon substructure of a rail vehicle

[0003] The invention relates to a pivot pin for a flexible coupling of a bogie to a wagon substructure of a rail vehicle. The invention also relates to a running gear for a rail vehicle. Furthermore, the invention relates to a rail vehicle. Furthermore, the invention relates to a method for producing a pivot pin for a flexible coupling of a bogie to a wagon substructure of a rail vehicle.

[0004] Rail vehicles have a bogie for traction and directional control. Wheels are mounted on the bogies, which are in contact with the rails. The bogies are also connected to the undercarriage of the respective rail vehicle by a pivot pin, providing a longitudinally positive connection.

[0005] This design for the positive connection between the bogie and the car substructure was previously achieved either by using complex cast parts with subsequent mechanical finishing or by welding. The limiting factor in the design of the pivot pins was previously the internal material defects in the cast part or the stresses in the weld seam of such a pivot pin.

[0006] A typical arrangement of a conventional cast pivot pin is shown in FIG 1 . Cast pivot pins are usually homogeneous one-piece components which contain both the geometry for the required form fit to the bogie and the connection geometry to the car body. The pivot pins are generally machined afterwards. The design shown in FIG 1 is very complex due to the manufacturing process and must be closely coordinated with the supplier in order to reduce the risk of internal defects or shrinkage cavities in the component. The supplier must be closely involved in the design of the pivot pin at an early stage. Their feedback regarding manufacturability and manufacturing aspects has a decisive influence on the design of the pivot pin. A later change of supplier with the existing design is probably not possible without further ado. This results in a high level of dependency on the supplier.Furthermore, this type of production requires long lead times for creating models for the casting molds. Furthermore, the use of high-strength materials is only possible to a limited extent due to the casting process.

[0007] FIG 2 shows a conventional arrangement of a welded pivot pin. Welded pivot pins consist of a cylindrical or rectangular body through which the force is introduced into the ribs of the pivot pin and into the structure of the underframe or car body. The material connection to the ribs is achieved by dimensioned welds. As the force flows through the welds, the stress on the welds is high and requires increased testing of the welds. Crack testing of the welds must therefore be carried out as part of maintenance. The welded construction offers a higher degree of flexibility in design due to the variety of materials and sheets and their ready availability, particularly with regard to high-strength materials.

[0008] The task is therefore to specify a pivot pin for a rail vehicle which is easier to manufacture and maintain and which has an improved adhesion between the bogie and the car chassis of a rail vehicle.

[0009] This object is achieved by a pivot pin for a flexible coupling of a bogie to a wagon substructure of a rail vehicle according to patent claim 1, a running gear for a rail vehicle according to patent claim 12, a rail vehicle according to patent claim 13 and a method for producing a pivot pin for a flexible coupling of a bogie to a wagon substructure of a rail vehicle according to patent claim 14.

[0010] The pivot pin according to the invention for a flexible coupling of a bogie to a wagon substructure of a rail vehicle has two flat rib structures arranged opposite one another. The two flat rib structures each have a foot section and a shaft section. The wagon substructure forms the supporting structure of a rail vehicle or of a housing of a rail vehicle and, in the case of a self-supporting rail vehicle design, can comprise the lower section of a wagon body of a rail vehicle facing the ground. Alternatively, in the case of a frame construction of a rail vehicle, the wagon substructure can also comprise the frame or the underframe. A bogie is to be understood as a running gear of a rail vehicle in which wheel sets are mounted in a frame or chassis that can rotate relative to the wagon substructure of the rail vehicle.A positive connection between a wagon substructure and a bogie is understood to mean a connection that is positively locked at least in the longitudinal and transverse directions, which prevents the bogie from becoming detached from the wagon substructure due to a force in the longitudinal and transverse directions, preferably also in the vertical direction, and which allows force to be transmitted between the bogie and the wagon substructure. The positive connection is quite flexible, so that the bogie can rotate slightly relative to the wagon substructure.

[0011] A rib structure is a plate-like structure that makes another component more stable against deformation. It is arranged perpendicular to the component to be stabilized or at an angle that is significantly different from 0°. A rib structure is described as "flat" if its spatial extent can be assigned to a two-dimensional or three-dimensional surface that is encompassed by the rib structure and which essentially defines its course and extent. The extent of the rib structure perpendicular to this surface is small compared to its surface area. In colloquial terms, the rib structure is therefore "thin" in the normal direction to the surface if one compares the extent of the rib structure in the normal direction with the extent of the rib structure in the surface direction, i.e. in a direction that is oriented tangentially to the surface.

[0012] In this context, a foot section is understood to mean a section of the rib structures that forms the base of a rib structure. In this context, a base is understood to mean a section of a rib structure that is designed to be firmly connected to the wagon substructure. A shaft section is understood to mean a section of a rib structure that forms a type of vertical axis that has the function of creating a positive connection with a bogie and around which the bogie can be flexibly pivoted at an angle of a few degrees.

[0013] The stiffness of the rib structures in the longitudinal direction of the rail vehicle can be influenced by the contours of the rib structures. The base-shaft design of the rib structure preferably results in a pivot pin shape that widens towards the base section. The widening shape of the pivot pin serves to transmit forces that are introduced into the pivot pin in the base section and via the pivot pin into the undercarriage of a rail vehicle. The pivot pin has sufficient stability to transmit these forces.

[0014] The pivot pin also has a prism-shaped solid structure which is arranged between the shaft sections of the two opposing rib structures and is firmly connected to the two opposing rib structures. Furthermore, the pivot pin comprises one or more connecting ribs which are arranged between the foot sections of the two opposing rib structures and are firmly connected to the two opposing rib structures and the prism-shaped solid structure. The pivot pin therefore obtains its stability from the stabilizing structures arranged between the flat rib structures, in particular from the prism-shaped solid structure and the one or more connecting ribs.

[0015] Advantageously, the flow of force between a bogie and the rib structures no longer occurs via a weld seam, thus eliminating a potential fracture point. Advantageously, the quality of the existing connecting structures, such as weld seams, can be graded, thus reducing the effort required for testing and quality assurance. Furthermore, no additional welded part, such as a bracket or bolt, is required to transmit the force. This reduces the effort required for mechanical processing.

[0016] The running gear according to the invention for a rail vehicle comprises a carriage substructure, a bogie, and a pivot pin according to the invention for connecting the carriage substructure to the bogie. The running gear according to the invention has the advantages of the pivot pin according to the invention, in particular with regard to stability, manufacturing complexity, and ease of maintenance.

[0017] The rail vehicle according to the invention has a chassis according to the invention. The rail vehicle according to the invention shares the advantages of the chassis according to the invention.

[0018] In the method according to the invention for producing a pivot pin for a flexible coupling of a bogie to a wagon substructure of a rail vehicle, flat rib structures with a foot section and a shaft section are produced. The two rib structures are then arranged opposite one another. Furthermore, a prism-shaped solid structure is formed. The prism-shaped solid structure is arranged between the two shaft sections of the two opposing rib structures and firmly connected to the two opposing rib structures. To stabilize the two rib structures in the transverse direction, a connecting rib is arranged between the two foot sections of the two opposing rib structures. Several connecting ribs can also be used for stabilization in order to further increase the stability of the overall structure.The connecting rib is firmly connected to the two opposing rib structures and the prism-shaped solid structure.

[0019] The method according to the invention has the particular advantage of simplified production with lower machining requirements and lower quality requirements regarding the creation of the connection points between individual components. Advantageously, the production time is shortened and the expenditure on specialized personnel for production is reduced.

[0020] The dependent claims and the following description each contain particularly advantageous embodiments and developments of the invention. In particular, the claims of one claim category can also be developed analogously to the dependent claims of another claim category and their description parts. Furthermore, within the scope of the invention, the various features of different embodiments and claims can also be combined to form new embodiments.

[0021] In one embodiment of the pivot pin according to the invention, the rib structures are designed such that their surface tapers from their base section to their shaft section. Advantageously, the base is made wider, so that the connection to the car substructure can be particularly stable and extensive. Advantageously, this stable connection also allows leverage forces acting from the bogie via the shaft section onto the base section to be particularly well absorbed.

[0022] The base section of a respective rib structure is preferably dimensioned to be wide and extended over its surface. The rib structure is aligned in such a way that its narrow side is visible from a frontal view, a plan view or a view from below, but not from a side view. The surface side of the rib structure, on the other hand, is essentially recognizable from a side view. The base section should now be wide and extended in the longitudinal direction so that it can withstand a force in the longitudinal direction particularly well. The shaft section of a respective rib structure is also preferably dimensioned to be narrow over its surface. The shaft section should now be less wide and even relatively narrow in the longitudinal direction compared to the extent of the base section in this direction. The shaft section forms the head region of the pivot pin, which engages in a receptacle in the bogie.

[0023] Preferably, the flat rib structures are T-shaped or Y-shaped, with the "stem" being formed by the shaft section and the "beam" or "fork" being formed by the foot section. This special shape advantageously creates a stable base for attachment to the wagon substructure and forms an axial shaft section around which a rotational movement of the bogie can take place.

[0024] The foot section is preferably designed to be firmly connected to the carriage substructure, and the shaft section is preferably designed to form a positive connection with the bogie in the longitudinal and / or transverse direction. This particularly robust type of fastening of the pivot pin to the carriage substructure advantageously creates the conditions for a force acting on the bogie in the longitudinal or transverse direction to be transmitted via the foot section to the carriage substructure, thus enabling the rail vehicle to be moved in different directions.

[0025] The base section of the pivot pin according to the invention is preferably designed so that the connection between the pivot pin and the vehicle substructure is materially bonded. The strength of the connection between the pivot pin and the vehicle substructure is advantageously improved by the materially bonded connection. To create a material bond, a connecting material is introduced between a contact surface of the base section and a contact surface of the vehicle substructure. Furthermore, the contact surfaces are preferably pretreated accordingly in order to achieve particularly good contact between the connecting material and the contact surfaces.

[0026] Likewise, the pivot pin is preferably designed such that the connection between the pivot pin and the carriage substructure is positively connected. In the case of a positive connection, the contact surfaces of the substructure and the base section of the pivot pin are structured such that they interlock and offer mechanical resistance to relative movement of the pivot pin with respect to the carriage substructure in at least one direction. The strength of the connection between the base section of the pivot pin and the underside of the carriage substructure is advantageously increased by the positive connection.

[0027] Preferably, the material-to-material connection between the pivot pin according to the invention and the vehicle substructure is a welded joint. Such a welded joint allows for a particularly strong connection between the underside of the vehicle substructure and the pivot pin.

[0028] Alternatively, the pivot pin according to the invention is designed so that the material-fit connection comprises an adhesive bond. Advantageously, the adhesive bond creates a firm, material-fit connection between the pivot pin and the underside of the substructure.

[0029] In a preferred variant of the pivot pin according to the invention, the connecting rib is trapezoidal. The two flat rib structures thus form a kind of blunt wedge structure, whereby the bearing surface of the pivot pin on the underside of the carriage substructure is somewhat larger than the surface of the tip or the outer end of the shaft section, and the stability in the foot section is further increased. This facilitates the introduction of force at the outer end of the shaft section and its transmission towards the carriage substructure, promoting the stability of the pivot pin in the transverse direction.

[0030] Preferably, the trapezoidal connecting rib is designed, by its trapezoidal shape, to define the distance between the flat rib structures, such that the distance between the rib structures increases from the shaft sections to the foot sections of the rib structures. The aforementioned advantageous blunt wedge shape of the pivot pin is advantageously achieved.

[0031] The pivot pin according to the invention preferably has a contact plate arranged in the front direction perpendicular to the rib structures at the edges of their shaft sections in front of the prism-shaped solid structure. The contact plate advantageously absorbs wear forces due to tensile forces or acceleration forces and movements of the bogie and prevents wear of the surface, in particular of the paintwork of the pivot pin.

[0032] The pivot pin according to the invention preferably has a contact plate on the rear side of the pivot pin, opposite the front side, or on the prism-shaped solid structure of the pivot pin. The contact plate advantageously absorbs wear forces due to braking or deceleration forces and movements of the bogie, and prevents wear on the surface, in particular on the paintwork of the pivot pin.

[0033] The pivot pin according to the invention preferably comprises two contact plates, one contact plate on the front of the pivot pin and one contact plate on the back of the pivot pin. Wear effects caused by forces acting on the pivot pin in both longitudinal directions are advantageously reduced. The contact plate transmits the longitudinal forces of the chassis to the pivot pin. The contact plate forms the contact surface with the bogie. The pivot pin is preferably painted except in the area of ​​the contact plates. The movements of the bogie advantageously result in stress on the hard wear plate and not on the vulnerable paint layer of the pivot pin, so that the surface of the pivot pin itself is protected.

[0034] The pivot pin according to the invention preferably comprises one or more weldable metallic materials. Alternatively, non-metallic materials, in particular CFRP or GFRP materials, can also be used, with the components preferably being bonded to one another by adhesive bonding.

[0035] If the components are made of metal, conventional methods for mechanical sheet metal processing, preferably cutting, milling or drilling, can be used to produce the individual components of the pivot pin according to the invention.

[0036] On the bogie side, rubber-metal elements or rubber-spring elements are preferably designed at the respective contact points to the pivot (longitudinal and / or transverse) to cushion longitudinal and transverse forces.

[0037] The main function of the pivot pin is to absorb longitudinal forces. Therefore, rubber-metal spring elements with plastic wear or contact plates are preferably installed in front of and behind the pivot pin. The absorption of transverse forces at the pivot pin is optional; these forces can also be introduced into the undercarriage or the vehicle substructure at other points using brackets.

[0038] Preferably, the connection between the connecting rib and the rib structures of the pivot pin according to the invention is a material connection, in particular a welded connection. Alternatively or additionally, it can be realized by an adhesive connection or by a form-fitting connection, for example by riveting seams or by screwing.

[0039] The connection of the prism-shaped solid structure with the rib structures and / or with the connecting rib(s) can also be materially and / or form-fitting.

[0040] The contact plate is preferably connected to the ribs and / or the solid structure via a welded joint. A welded joint requires less maintenance and is more stable than screw or rivet connections.

[0041] The invention is explained in more detail below with reference to the accompanying figures using exemplary embodiments. They show:

[0042] FIG 1 is a schematic representation of a chassis and its connection to the undercarriage of a rail vehicle,

[0043] FIG 2 shows a detailed representation of a conventional pivot pin in a receiving area of ​​a bogie of a running gear of a rail vehicle,

[0044] FIG 3 is a schematic representation of a conventional cast pivot pin, FIG 4 is a schematic representation of a conventional welded pivot pin,

[0045] FIG 5 is a schematic representation of a pivot pin according to an embodiment of the invention,

[0046] FIG 6 is a view of the pivot pin shown in FIG 5 in a state mounted on the underside of a car body,

[0047] FIG 7 is a flow chart illustrating a method for manufacturing a pivot pin according to an embodiment of the invention.

[0048] 1 shows a schematic representation 14 of a running gear with a chassis 16 or bogie, which is mounted on a car body 15 by a pivot pin 1 and forms a positive connection with the pivot pin 1 of the car body 15. The chassis 16 has a receiving area 18 in the center, which comprises a plurality of rubber spring elements 19 at its lower end. The car body 15, which is shown in FIG. 1 in the upper section of the pictorial representation 14, has the aforementioned pivot pin 1 in the center. This pivot pin 1 engages in the receiving area 18 of the chassis 16. The pivot pin 1 has a tapered pin end 4, which is arranged between the rubber spring elements 19. A lift-off protection device 20 is passed through the head area of ​​the pin end 4.

[0049] FIG 2 shows a detailed representation 17 of a pivot pin 1 in a receiving area 18 of a bogie 16. The lower pin end 4 is secured against displacement in the vertical direction by a lift-off lock 20. Furthermore, bushings with rubber spring elements 19 are arranged between the pin end 4 and the bogie 16. The rubber spring elements 19 dampen shocks in the longitudinal and transverse directions and allow rotation of the bogie 16 relative to the pivot pin 1. FIG 3 shows a perspective view of a conventional one-piece cast pivot pin 1. The cast pivot pin 1 consists of a base body 2 on which four ribs 5 are arranged in pairs facing one another. The ribs 5 are flat and planar and are delimited by side edges 7, 8 and are connected to the base body 2 in one piece. The ribs 5 form the connecting elements to the car body (not shown).In this special case, the lower pin end 4 is cuboid-shaped and is also connected to the base body 2 in one piece. After the casting process, the pivot pin 1 is mechanically machined. The manufacture of the pivot pin 1 is very complex due to the manufacturing process and must be closely coordinated with the supplier in order to reduce the risk of internal defects or blowholes in the component. This results in a high level of dependency on the supplier. For the manufacture of such a one-piece pivot pin 1, long lead times for the creation of models for the casting molds must be taken into account. As already mentioned, the use of high-strength materials is only possible to a limited extent.

[0050] FIG 4 shows a perspective view of a conventional welded pivot pin 1. The pivot pin 1 consists of a base body 2 on which four ribs 5 are arranged in pairs facing one another. The ribs 5 are flat and planar and are delimited by side edges 6, 7, 8, 9. Each rib 5 is welded to the base body 2 by means of a connecting side edge 6 extending in the direction of the base body longitudinal axis 10. For example, the connecting side edge 6 adjacent to the base body 2 can be welded on both sides along its longitudinal edges 6a by means of a Y-weld seam. The base body 2 has a base body end 3 on which a pin 4 is formed. The pin 4 arranged at the base body end 3 has an end face 11 adjacent to the base body end 3 and extends along its longitudinal axis 12 to a pin head region 13.The ribs 5 welded to the base body 2 rest with their rib ends on the end face 11 of the pin 4. To attach the pin 4 to the base body 2, the pin 4 can be welded to the base body end 3 and / or to the rib ends in the area of ​​the side edges 9, for example by means of a Y-weld seam in the area of ​​the longitudinal edges 9a, 9b of the side edge 9 and in sections along the bevelled edge 3a around the base body end 3. The pin 4 has a round cross-section, whereby this means the cross-section running normal to the longitudinal axis 12 of the pin 4. A pin 4 with a round cross-section can be produced by manufacturing the pin 4 from a bar using a turning process. The cross-section of the pin 4 increases in the direction of the base body 2.Together with the arched contour of the ribs 5, which is brought about by the arched contour side edge 8 of the ribs 5, this results in an overall shape of the pivot pin 1 that widens starting from the head region 13 of the pin 4. The stiffness of the ribs 5 can be adjusted via the course of the contour side edges 8. The widening shape of the pivot pin 1 serves to transmit forces that are introduced in the head region 13 into the pivot pin 1 and via the pivot pin 1 into an element resting on the support side edges 7 (not shown), for example a car body of a rail vehicle. To transmit these forces, the pivot pin 1, which is welded together at the side edges 6, has sufficient stability. The ribs 5 and the base body 2 are manufactured separately from one another but are welded to one another.

[0051] 5 shows a pivot pin 1 according to an exemplary embodiment of the invention. The pivot pin 1 has two ribs 5 arranged in pairs which perform both fastening functions on the car body 15 (see FIG. 6) and also enable positive locking in the direction of travel with the bogie. For this purpose, the ribs are T-shaped or Y-shaped, with the beam of the T or the filled fork of the Y performing the fastening function on the car body 15 and thus forming the foot section 5a of a rib 5, and the stem of the T or Y enabling positive locking with the bogie in the direction of travel and transverse direction and thus forming the shaft section 5b of a rib 5. The two ribs 5 are aligned with their surface sides 5d in the longitudinal direction. The edge surfaces 5c of the ribs 5 are aligned perpendicular to the longitudinal direction.A connecting rib 21 is formed between the paired ribs 5, which distances the two ribs 5 from one another. The connecting rib 21 has a trapezoidal surface when viewed in the front direction, wherein the shorter roof side of the trapezoidal surface is aligned towards the shaft section 5b or the stem of the T or Y, and the base side of the trapezoidal surface is aligned towards the foot section 5a or beam of the T or the upper end of the fork of the Y. The ribs 5 are therefore inclined towards one another in the direction of the shaft section 5b. A block-like or approximately prism-shaped solid structure 22 is arranged between the ribs 5 at the end of the shaft section 5b. In front of the front and the back of the solid structure 22 there is a contact plate 23 which absorbs the forces acting on the pivot pin 1 from the bogie (not shown) in the longitudinal direction.Wear effects caused by relative movements of the bogie to the pivot pin 1 are absorbed.

[0052] In FIG. 6, the pivot pin 1 shown in FIG. 5 is shown mounted on the underside of a car body 15. The ribs 5 of the pivot pin 1 serve both to introduce the load at the pivot point of the bogie (not shown) and to fasten the pivot pin 1 to the car body 15. A possible lift-off protection can be integrated via a bolt or similar, if required, at the narrow end, i.e., at the lower end of the pivot pin 1.

[0053] FIG 7 shows a flow chart 700 which illustrates a method for producing a pivot pin for a flexible coupling of a bogie to a car substructure of a rail vehicle according to an embodiment of the invention.

[0054] In step 7.1, two rib structures 5 which are T-shaped in the longitudinal direction and each have a foot section 5a which is wide in the longitudinal direction and a shaft section 5b which is narrow in the longitudinal direction are produced.

[0055] In step 7.II, a prism-shaped solid structure 22 is arranged between the two shaft sections 5b of the ribs 5, such that the prism-shaped solid structure 22 is firmly connected to the two shaft sections 5b of the ribs 5.

[0056] In step 7. III, a slightly trapezoidal connecting rib 21 is formed.

[0057] This trapezoidal connecting rib 21 is arranged in step 7.IV between the rib structures 5 such that it runs vertically from the shaft section 5b to the foot section 5a of the ribs 5 and is firmly connected to the ribs 5 and the prism-shaped solid structure 22. The connecting rib 21 defines the distance between the ribs 5, which are T-shaped in the longitudinal direction, such that the distance between the ribs 5 increases from the shaft section 5b to the foot section 5a.

[0058] Finally, it is pointed out once again that the methods and devices described above are merely preferred embodiments of the invention and that the invention can be varied by a person skilled in the art without departing from the scope of the invention, insofar as it is defined by the claims. For the sake of completeness, it is also pointed out that the use of the indefinite articles "a" or "an" does not exclude the possibility that the features in question may be present in multiple copies. Likewise, the term "unit" does not exclude the possibility that this may consist of several components, which may also be spatially distributed. Regardless of the grammatical gender of a particular term, persons with male, female or other gender identity are included.

Claims

Patent claims 1. Pivot pin (1) for a flexible coupling of a bogie (16) to a wagon substructure (15) of a rail vehicle, comprising: - two flat rib structures (5) arranged opposite one another, each having a foot section (5a) and a shaft section (5b), - a prism-shaped solid structure (22) which is arranged between the shaft sections (5b) of the two opposing rib structures (5) and is firmly connected to the two opposing rib structures (5), - a connecting rib (21) which is arranged between the foot sections (5a) of the two opposing rib structures (5) and is firmly connected to the two opposing rib structures (5) and the prism-shaped solid structure (22).

2. Pivot pin according to claim 1, wherein the rib structures (5) taper in surface from their base portion (5a) to their shaft portion (5b).

3. Pivot pin according to claim 1 or 2, wherein - the foot section (5a) of a respective rib structure (5) is dimensioned to be broad and extended in area and - the shaft section (5b) of a respective rib structure (5) is narrow in area.

4. Pivot pin according to one of the preceding claims, wherein the flat rib structures (5) are T-shaped or Y-shaped.

5. Pivot pin according to one of the preceding claims, wherein the foot portion (5a) of a respective flat rib structure (5) is designed to be firmly connected to the carriage substructure (15).

6. Pivot pin according to one of the preceding claims, wherein the shaft section (5b) of a respective flat rib structure (5) is designed to form a positive connection in the longitudinal direction with the bogie (16).

7. Pivot pin according to one of the preceding claims, wherein the foot sections (5a) are designed so that the connection between the pivot pin (1) and the carriage substructure (15) is materially and / or positively connected.

8. Pivot pin according to claim 7, wherein the material connection comprises a welded connection and / or adhesive connection.

9. Pivot pin according to one of the preceding claims, wherein the connecting rib (21) is trapezoidal.

10. Pivot pin according to claim 9, wherein the trapezoidal connecting rib (21) is designed by its trapezoidal shape to define the distance between the flat rib structures (5) such that the distance between the flat rib structures (5) increases from the shaft sections (5b) to the foot sections (5a) of the rib structures (5).

11. Pivot pin according to one of the preceding claims, comprising a contact plate (23) which is arranged in the front direction perpendicular to the flat rib structures (5) on the edge surfaces (5c) of the shaft sections (5b) of the flat rib structures (5) in front of the prism-shaped solid structure (22).

12. Chassis (14) for a rail vehicle, comprising: - a carriage substructure (15), - a bogie (16) , - a pivot pin (1) according to one of the preceding claims 1 to 11 for the flexible connection of the bogie (16) to the car substructure (15).

13. A rail vehicle comprising a chassis (14) according to claim 12.

14. A method for producing a pivot pin (16) according to one of claims 1 to 11 for a flexible coupling of a bogie (16) to a carriage substructure (15) of a rail vehicle, comprising the steps: - Production of two flat rib structures (5) with a foot section (5a) and a shaft section (5b), - arranging the flat rib structures (5) opposite one another, - Formation of a prism-shaped solid structure (22) , - arranging the prism-shaped solid structure (22) between the two shaft sections (5b) of the two opposing, flat rib structures (5), - firmly connecting the prism-shaped solid structure (22) with the two opposing, flat rib structures (5), - Arranging a connecting rib (21) between the foot sections (5a) of the two opposing, flat rib structures (5) - firmly connecting the connecting rib (21) to the two opposing, flat rib structures (5) and the prism-shaped solid structure (22).

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