Link rod

Abstract

Linkage rod (1) comprising a base body extending along a longitudinal axis, which at each of its ends comprises a bore (2, 3) oriented transversely to the longitudinal axis, wherein the base body has at least one recess (4) whose respective longitudinal axis intersects the longitudinal axis of the base body.

Description

Technical field

[0001] The invention relates to a connecting rod for connecting a rail vehicle car body to a chassis and to an arrangement for connecting two rail vehicle car bodies comprising a connecting rod. State of the art

[0002] The bogies of rail vehicles must be connected to the car body in such a way that the tensile and compressive forces between the bogie (e.g., a bogie) can be transmitted reliably and continuously, while the bogie is still able to perform all necessary movements relative to the car body. These movements include not only vertical compression but also rotational movements around a vertical axis when negotiating curves. It is common practice to connect a bogie, especially a bogie, to the car body by means of at least one connecting rod. This connecting rod typically has a mounting point at each end, usually a metal-rubber bearing. This allows the connecting rod to pivot through a certain angle relative to the car body and reduces the transmission of vibrations and noise from the bogie to the car body.Certain vehicle designs involve positioning the chassis between two car bodies, with both car bodies supported jointly on the chassis. In such designs, the reduced installation space can make it difficult to accommodate a connecting rod. This problem is particularly acute in vehicle designs that use a ball joint to connect the car bodies instead of a rod coupling. Because these designs require the integration of a so-called transverse stop bolt into the joint, and this bolt occupies the space below the joint, this space is unavailable for a connecting rod. Positioning a connecting rod next to the transverse stop is not possible, as such an asymmetrical arrangement would cause the chassis to rotate around a vertical axis under the influence of acceleration or braking forces. Description of the invention

[0003] The invention is therefore based on the objective of providing a linkage rod which can be used in vehicle concepts that provide a transverse stop bolt and which does not collide with the transverse stop bolt.

[0004] The problem is solved by a connecting rod with the features of claim 1 and an arrangement for connecting two rail vehicle car bodies according to claim 8. Advantageous embodiments are the subject of dependent claims.

[0005] According to the basic idea of ​​the invention, a connecting rod is described which has a base body extending along a longitudinal axis, which at each of its ends comprises a bore oriented transversely to the longitudinal axis, wherein the base body has at least one recess whose respective longitudinal axis intersects the longitudinal axis of the base body.

[0006] This offers the advantage of creating a linkage rod that can be penetrated by another component, in particular a transverse stop bolt. A typical linkage rod is penetrated by the fasteners used to attach it to a car body or chassis; these are often designed as noise- and vibration-damping rubber-metal elements.

[0007] According to the invention, the connecting rod is designed such that it has a base body extending along a longitudinal axis, with a bore at each end of the base body. These bores are provided for attaching the connecting rod to a rail vehicle car body or a chassis. It is advantageous to insert a rubber-metal element into each of these bores, thus ensuring that the connecting rod can pivot through a specific angle relative to the car body and the chassis. According to the invention, the base body has at least one recess whose longitudinal axis intersects the longitudinal axis of the base body. This connecting rod can therefore be used to connect a chassis to a car body when the chassis is arranged between two coupled car bodies and a transverse stop bolt projects downwards from the coupling between the car bodies.

[0008] The connecting rod is advantageously designed so that the bores are oriented parallel to each other. In the mounted position, these bores can be horizontally aligned, allowing the connecting rod to pivot about a horizontal axis relative to the car body to which it is connected. This ensures that suspension movements of the chassis are not affected. As mentioned earlier, these bores are designed to accommodate a rubber-metal element, thus providing a noise- and vibration-damping mounting. Such a rubber-metal element also allows a small degree of rotation of the connecting rod relative to the car body or chassis about a vertical axis.

[0009] A preferred embodiment of the invention provides that the longitudinal axis of the at least one recess and the longitudinal axes of the bores are rotated 90 degrees relative to each other. This allows a vertically oriented transverse stop bolt to penetrate the connecting rod while simultaneously ensuring that the bores for fastening the connecting rod are horizontally oriented.

[0010] It is particularly advantageous to design the connecting rod such that the at least one recess penetrates the base body. This means that the recess is completely surrounded on all sides by the material of the connecting rod, perpendicular to its longitudinal axis. In this way, bending stress on the connecting rod can be avoided, as can occur with other recess shapes, for example, if the connecting rod were C-shaped, meaning the recess was not completely enclosed.

[0011] The manufacture of a linkage rod according to the invention can be carried out using steel, depending on the expected mechanical load. It is particularly advantageous to manufacture the linkage rod by means of a casting or forging process. The bores, due to the required tolerances, must naturally be machined.

[0012] Certain alloys of light metal, especially aluminium alloys, also allow a linkage rod to be manufactured using a forging process, which has the required strength.

[0013] Furthermore, the invention comprises an arrangement for connecting two rail vehicle car bodies. The rail vehicle car bodies are pivotably connected to one another by means of a ball joint, and a bogie is arranged below the ball joint. A transverse stop bolt extending downwards is provided on the ball joint, and a connecting rod is arranged between one of the rail vehicle car bodies and the bogie, the connecting rod having at least one recess through which the transverse stop bolt passes.

[0014] It is essential that the recess in the connecting rod is dimensioned so that the transverse stop bolt is free from contact with the connecting rod in every permissible relative position of the bogie to the ball joint.

[0015] In this way, a centrally located transverse stop bolt can be used together with a similarly centrally located connecting rod. This is advantageous because the connecting rod must necessarily be centrally located, and alternative transverse stops require additional components such as transverse stop brackets, which increases the overall mass of the vehicle. Furthermore, mounting a bogie on a vehicle with a centrally located transverse stop bolt is simpler than on vehicles with other transverse stops. Brief description of the drawings

[0016] They show, for example: Fig. 1 Linkage rod and cross stop bolt view. Fig. 2 Linkage rod and cross stop bolt section. Fig. 3 Linkage rod. Fig. 4 Arrangement for connecting two rail vehicle car bodies. Implementation of the invention

[0017] Fig. 1Figure 1 shows an exemplary and schematic oblique view of a linkage rod and a transverse stop bolt. A linkage rod 1 is depicted, comprising a base body extending along a longitudinal axis, with a bore 2, 3 oriented transversely to the longitudinal axis at each of its two ends. The linkage rod 1 is manufactured in one piece from metal and, in this embodiment, has three recesses 4, 5, 6. The two additional recesses 5, 6 serve to reduce the mass of the linkage rod 1 and are therefore not required for the function according to the invention. The recess 4 extends through the base body of the linkage rod 1, allowing a transverse stop bolt 7 to pass through the recess 4. The recess 4 is completely surrounded by the base body of the linkage rod 1, so that no bending forces occur under tensile or compressive forces along the longitudinal axis of the linkage rod 1.In the illustrated embodiment, the transverse stop bolt 7 is designed as an essentially rotationally symmetrical component, which is designed at one of its ends for attachment to another assembly, for example a housing of a ball joint, and which is equipped at its other end, which is oriented downwards in the installation position, with at least one stop surface 8.

[0018] Fig. 2 This shows, as an example and schematically, a linkage rod and a transverse stop bolt in a sectional view. It is linkage rod 1 from Fig. 1The component is shown in a sectional view along its longitudinal axis, clearly showing the positions of the recesses 4, 5, and 6. The distance between the transverse stop bolt 7 and the inner wall of the recess 4 is also evident, as for the proper functioning of the connecting rod 1 and the transverse stop bolt 7, these components must not touch each other during the operation of a rail vehicle in any permissible relative position of the chassis with respect to the mounting point of the transverse stop bolt 7.

[0019] Fig. 3 This shows an example and schematic of a linkage rod. It is linkage rod 1 from the Figs. 1 and 2 Shown without further components. The additional recesses 5, 6 serve solely to reduce the mass of the connecting rod 1.

[0020] Fig. 4Figure 1 shows an exemplary and schematic arrangement for connecting two rail vehicle car bodies. A connecting rod 1 is depicted, in a highly abstract manner, in its mounting position. In the illustrated embodiment, a first car body 9 and a second car body 10 are pivotably connected to each other by means of a ball joint 11. A bogie 14 is arranged between the car bodies 9 and 10 below the ball joint 11, with a transverse stop bolt 7 projecting towards the bogie 14 attached to the ball joint 11. The bogie 14 has a stop 15 which limits the freedom of movement of the bogie 14 with respect to the transverse stop bolt 7. The bogie 14 is thus mounted so that it can be displaced by a certain distance in the transverse direction relative to the ball joint. In the longitudinal direction relative to the ball joint 11, and thus to the car bodies 9 and 10, the bogie 14 is fixed by means of the connecting rod 1.The connecting rod is arranged centrally in the longitudinal direction of the bogie 14; therefore, without the recess 4, it would collide with the transverse stop bolt 7. Reference symbol list

[0021] 1 Linkage rod 2 First bore 3 Second bore 4 Recess 5 1st Additional recess 6 2nd Additional recess 7 Cross stop bolt 8 Stop surface 9 First car body 10 Second car body 11 Ball joint 12 Connection linkage rod first car body 13 Connection linkage rod bogie 14 Bogie 15 Stop

Claims

1. Linkage rod (1) comprising a base body extending along a longitudinal axis, which at each of its ends comprises a bore (2, 3) oriented transversely to the longitudinal axis, characterized by the fact that the base body has at least one recess (4) whose respective longitudinal axis intersects the longitudinal axis of the base body.

2. Linkage rod (1) according to claim 1, characterized by the fact that the bores (2, 3) are oriented parallel to each other.

3. Linkage rod (1) according to claim 1 or 2, characterized by the fact that the bores (2, 3) are designed to accommodate one rubber-metal element each.

4. Linkage rod (1) according to one of claims 1 to 3, characterized by the fact that the longitudinal axis of the at least one recess (4) and the longitudinal axes of the bores (2, 3) are aligned rotated 90 degrees relative to each other.

5. Linkage rod (1) according to one of claims 1 to 4, characterized by the fact that which at least one recess (4) penetrates the base body.

6. Linkage rod (1) according to one of claims 1 to 5, characterized by the fact that the connecting rod (1) is made of steel using a casting process.

7. Linkage rod (1) according to one of claims 1 to 5, characterized by the fact that the connecting rod (1) is made of steel using a forging process.

8. Linkage rod (1) according to one of claims 1 to 5, characterized by the fact that the connecting rod (1) is manufactured from light metal using a forging process.

9. Arrangement for connecting two railway vehicle bodies (9, 10) comprising a connecting rod (1), wherein the railway vehicle bodies (9, 10) are pivotably connected to each other by means of a ball joint (11) and a bogie (14) is arranged below the ball joint (11), wherein a transverse stop bolt (7) is provided which is arranged on the ball joint (11) and extends downwards, characterized by the fact thatthe connecting rod (1) is arranged between one of the rail vehicle car bodies (9, 10) and the bogie (14), which has at least one recess (4) through which the transverse stop bolt (7) penetrates.

10. Arrangement for connecting two railway vehicle car bodies according to claim 9, characterized by the fact that the recess (4) in the connecting rod (1) is dimensioned such that the transverse stop bolt (7) is non-contacting the connecting rod (1) at every permissible relative position of the bogie (14) to the ball joint (11).

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