Reinforcing frame

Abstract

A reinforcing frame (1) for a railway carriage body (2) of a rail vehicle, the reinforcing frame (1) being designed in the form of a flat component having at least three connection points (3, 4, 5) for a removable connection to a railway carriage body (2) of a rail vehicle and holes (6a, 6b, 7a, 7b, 8, 8a, 8b).

Description

[0001] Description

[0002] Reinforcement frame .

[0003] Technical area

[0004] The invention relates to a reinforcement frame for a car body of a rail vehicle.

[0005] State of the art

[0006] Rail vehicle car bodies exhibit what are known as natural vibrations, which develop in a variety of different modes and frequencies. Very low-frequency vibrations are responsible for impairing travel comfort for passengers. These vibrations, with typical frequencies below 10 Hz, cannot be heard but can only be felt. Modern rail vehicles are built according to the principles of lightweight construction, either as integral light metal structures or as differential steel structures. This lightweight construction promotes the development of low-frequency vibration modes. To prevent these vibrations, a car body can be constructed with greater global stiffness, although this results in a higher mass and is therefore undesirable. As a further remedy, transverse reinforcements, for example in the form of bulkheads, can be installed.This solution is however only possible for compartment carriages, which are becoming less and less common these days, and cannot be used for the open-plan carriages that are currently in great demand. Another solution is to reinforce the car body in the roof area by installing smaller bulkheads only in the roof area, thereby stiffening it. In this way, the passenger compartment can still be designed as an open-plan carriage, but installations in the roof area, for example for lighting, air ducts or electrical equipment, are made much more difficult. European patent application EP 3740408 A2 discloses the provision of diagonally arranged tensioning cables in the roof area, which connect the opposite side walls in a tensile manner and thereby increase the car body's natural frequency. However, this solution hinders the installation of fixed ventilation ducts.

[0007] Description of the invention

[0008] The invention is therefore based on the object of increasing the natural frequency of a rail vehicle body and, at the same time, providing a possibility for preventing the propagation of low-frequency, in particular frequencies below the human hearing range, which does not hinder the installation of devices, in particular components for air supply.

[0009] The object is achieved by a reinforcement frame having the features of claim 1 and a rail vehicle body according to claim 5. Advantageous embodiments are the subject of subordinate claims.

[0010] According to the basic idea of ​​the invention, a reinforcement frame for a car body of a rail vehicle is described, wherein the reinforcement frame is designed as a plate-shaped component with at least three connection points for a detachable attachment to a car body of a rail vehicle and has recesses.

[0011] This provides the advantage of being able to arrange the reinforcement frame in the roof area of ​​a rail vehicle body transversely to the longitudinal extension of such a rail vehicle body, thus achieving a structurally reinforcing effect with a concomitant increase in the natural frequency of the rail vehicle body. Furthermore, components, in particular cables, can be routed through the recesses.

[0012] A significant advantage of a reinforcement frame according to the invention is the simple assembly via only three connection points and the only minimal precautions required on the rail vehicle body itself.

[0013] According to the invention, the reinforcement frame is designed as a plate-shaped component, for example, cut from a sheet of sheet steel, and has three connection points. These connection points are designed for the detachable fastening of the reinforcement frame, for which means for producing screw connections are particularly advantageous. This ensures that the reinforcement frame can be installed at a late stage in the production process of a rail vehicle car body, in particular after the complete production and painting of a so-called car body shell.

[0014] The tie-down points shall be arranged on the reinforcement frame such that two of the three tie-down points are located near each side wall of the rail vehicle body when the reinforcement frame is in its assembled position, and the third is located near the roof of the rail vehicle body. In this way, the reinforcement frame forms a triangle that reinforces the roof of the rail vehicle body.

[0015] Furthermore, the reinforcement frame includes recesses (openings, holes) so that components such as cables can be guided through the reinforcement frame.

[0016] These recesses in the reinforcement frame must be shaped so that between each of the at least three connection points, there is an essentially straight connection, which is designed without any recesses and which serves as a force path between the respective connection points. By eliminating recesses in the straight connections between the connection points, the material of the reinforcement frame remains unweakened and is available with full strength to reinforce the rail vehicle body.

[0017] A preferred embodiment of the invention provides for the reinforcement frame to be designed such that the reinforcement frame forms a section of a ventilation duct and is suitable for conveying the air guided in this ventilation duct. For this purpose, at least one recess in the reinforcement frame must be designed such that it can itself be used as an air duct, i.e., no ventilation duct penetrates the reinforcement frame, but rather connects to the reinforcement frame. The reinforcement frame itself forms a ventilation duct along its thickness. For this purpose, fastening means for attaching the ventilation duct to the reinforcement frame are advantageously provided.

[0018] A rail vehicle body according to the invention comprises a reinforcement frame as described above, which is arranged in the roof area transversely to the longitudinal extent of the rail vehicle body, wherein one connection point of the reinforcement frame is screwed to the rail vehicle body and the two other connection points are each connected to the rail vehicle body via a fork head rod. The screw connection of the reinforcement frame to the rail vehicle body can be effected directly or via an intermediate component, in particular an intermediate plate. Such an intermediate plate comprises fastening means in order to be detachably fastened both to the rail vehicle body and to the reinforcement frame and transmits tensile and compressive forces between these components.The two additional connection points are each connected to the rail vehicle body by means of a fork-head rod. For this purpose, a suitable fastening position for the fork-head rods must be provided on the rail vehicle body, preferably near the connecting line between the side wall and the roof. A bracket is suitable for this purpose, which is welded to the inside of the rail vehicle body and its supporting structure. Such a bracket can be arranged in the roof area above the passenger compartment and thus does not protrude into the passenger compartment.

[0019] The clevis rods should preferably be designed so that their length is adjustable when installed. This can be achieved, for example, by a center piece between two clevises, which is connected to the clevises with a left-hand and a right-hand thread. In this way, the distance between the clevises can be adjusted by turning the center piece. This means that the reinforcement frame can be provided with a precisely specifiable preload. It is advantageous to arrange a plurality of reinforcement frames in the roof area along the longitudinal extent of the rail vehicle body, transverse to the longitudinal extent. Typically, one reinforcement frame can be installed for every 2 meters of a rail vehicle body, so that the reinforcement is as uniform as possible over the entire length of the rail vehicle body and all vibration modes of the rail vehicle body are as high-frequency as possible.

[0020] It is advantageous to provide sections of a ventilation duct between the reinforcement frames and to detachably connect them to the adjacent reinforcement frames. In this way, the reinforcement frames act as a supporting structure for the ventilation duct. The air flowing in the ventilation duct can be guided directly through the recesses provided in the reinforcement frame, meaning that the individual sections of the ventilation duct do not have to penetrate the reinforcement frame. This makes installation of the ventilation duct much easier. The ventilation duct only needs to be inserted piece by piece between the already installed reinforcement frames and detachably connected (screwed) to the reinforcement frames. The usual complicated handling of long ventilation ducts, which is often difficult to install in the rail vehicle body, is no longer necessary.

[0021] In a further development of the invention, it is recommended to insert an elastic seal at the junction of a reinforcement frame with a section of a ventilation duct. The present invention is particularly advantageous for rail vehicle bodies made of steel in a differential design, since the required fastening points for the reinforcement frames can be easily installed there.

[0022] Brief description of the drawings

[0023] Examples include:

[0024] Fig.l Reinforcement frame.

[0025] Fig.2 Reinforcement frame in installation situation.

[0026] Fig.3 Reinforcement frame in installation situation, oblique view.

[0027] Implementation of the invention

[0028] Fig. 1 shows an example and schematically a reinforcement frame. A reinforcement frame 1 is shown which is formed as a plate-shaped component made of sheet metal. The reinforcement frame 1 has three connection points 3, 4, 5 which are designed to be detachably produced to form further components. In the present exemplary embodiment, the third connection point 5, which is to be connected to the roof area of ​​a rail vehicle when the reinforcement frame 1 is in the installed position, is designed as a screw connection, i.e. in the form of four bores for producing screw connections. The further connection points 3, 4 are designed to connect a fork head rod and are therefore designed as a bore for the passage of a bolt. The reinforcement frame 1 has a plurality of recesses 6a, 6b, 7a, 7b, 8, 8a, 8b, each of which penetrates the plate-shaped reinforcement frame 1.In the illustrated embodiment, the recesses 6a, 6b are assigned to a first ventilation duct, the recesses 7a, 7b are assigned to a second ventilation duct, and the recesses 8, 8a, 8b are assigned to a third ventilation duct. Thus, the air guided in a ventilation duct can penetrate the reinforcement frame 1. For fastening the ventilation ducts to the reinforcement frame 1, a plurality of bores 9 are provided along the circumference of the reinforcement frame 1, by means of which the ventilation ducts can be detachably connected to the reinforcement frame 1. The reinforcement frame 1 is constructed in such a way that there are direct, straight connections between the connection points 3, 4, 5, so that the reinforcement frame 1 is not deformed when tensile forces are applied via these connection points 3, 4, 5, since the force path runs directly between the connection points 3, 4, 5 and is not interrupted or deflected by recesses.As a result, the recesses used for air guidance are provided with a strut penetrating them, which, although it impairs the air flow, is nevertheless advantageous for the stability of the reinforcement frame 1 and thus of the car body.

[0029] Fig. 2 shows an example and schematically a reinforcement frame in its installed situation. It is a section through a rail vehicle body 2, transverse to its longitudinal direction, in which a reinforcement frame 1 is arranged in the roof area. The reinforcement frame 1 is constructed according to the exemplary embodiment shown in Fig. 1 and is detachably connected to the rail vehicle body 2 in the roof area of ​​the rail vehicle body 2 via an intermediate plate 11. The two further connection points 3, 4 are each connected to the rail vehicle body 2 via fork head rods 10 in the area of ​​the transition from the side walls to the roof. The arrangement of the fork head rods 10 above the side walls and thus outside the passenger area means that they do not restrict the passenger area and are also not visible from the passenger area.

[0030] Fig. 3 shows, by way of example and schematically, a reinforcement frame in its installed position in an oblique view. The exemplary embodiment from Fig. 2 is shown in an oblique view, wherein the arrangement of a ventilation duct 12 can be seen. A plurality of reinforcement frames 1 are arranged in the rail vehicle body 2, each as shown in Fig. 2 and each fastened via an intermediate plate 11 and two fork head rods 10. A ventilation duct 12 extends over the length of the rail vehicle body 2 and is divided into individual sections, which are each inserted between two reinforcement frames 1 and detachably connected to these reinforcement frames 1. Furthermore, it can be seen how parts of the reinforcement frame 1 penetrate the volume of the ventilation duct 12, since these parts form the direct straight connection between the connection points of the reinforcement frame 1.By varying the length of the fork-end rods 10, the reinforcement frame can be prestressed to the required level, thus reinforcing the rail vehicle body 2 under all load conditions. List of designations.

[0031] 1 reinforcement frame

[0032] 2 Rail vehicle body 3 First connection point

[0033] 4 Second tethering point

[0034] 5 Third tethering point

[0035] First recess for first ventilation duct Second recess for first ventilation duct First recess for second ventilation duct Second recess for second ventilation duct First recess for third ventilation duct Second recess for third ventilation duct Third recess for third ventilation duct Hole

[0036] Fork head rod intermediate plate ventilation duct

Claims

Patent claims 1. Reinforcing frame (1) for a car body (2) of a rail vehicle, characterized in that the reinforcing frame (1) is designed as a plate-shaped component with at least three connection points (3, 4, 5) for a detachable attachment to a car body (2) of a rail vehicle and has recesses (6a, 6b, 7a, 7b, 8, 8a, 8b).

2. Reinforcing frame (1) according to claim 1, characterized in that the reinforcing frame (1) is designed to form a section of a ventilation duct and to pass the air guided in this ventilation duct.

3. Reinforcing frame (1) according to claim 1 or 2, characterized in that the reinforcing frame (1) is made of steel.

4. Reinforcing frame (1) according to one of claims 1 to 3, characterized in that the recesses in the reinforcement frame (1) are shaped such that between each of the at least three connection points (3, 4, 5) there is a substantially straight connection which is designed without recesses in its course and which serves as a force path between the respective connection points.

5. Rail vehicle body with a reinforcement frame (1), characterized in that the reinforcement frame is designed according to one of claims 1 to 4 and is arranged in the roof area transversely to the longitudinal extent of the rail vehicle body, wherein one connection point of the reinforcement frame is screwed to the rail vehicle body and the two further connection points are each connected to the rail vehicle body via a fork head rod.

6. Rail vehicle body with a reinforcement frame (1) according to claim 5, characterized in that the fork head rods are adjustable in their length in the installed state.

7. Rail vehicle body with a reinforcement frame (1) according to claim 6, characterized in that a plurality of reinforcement frames are arranged in the roof area along the longitudinal extent of the rail vehicle body transversely to the longitudinal extent of the rail vehicle body, sections of a ventilation duct being provided between the reinforcement frames and being detachably connected to the adjacent reinforcement frames. 8 . Rail vehicle body with a reinforcing frame ( 1 ) according to claim 7 , characterized in that at the connection points between the reinforcing frames and the respective detachably connected sections of a ventilation duct elastic Seals are inserted.

9. Rail vehicle body with a reinforcement frame (1) according to one of claims 5 to 8, characterized in that the rail vehicle body is made of steel in a differential construction.

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