EP3221202A1

EP3221202A1 - Longitudinal support and transverse support for a chassis frame of a rail vehicle

Info

Publication number: EP3221202A1
Application number: EP16705499.8A
Authority: EP
Inventors: Markus Hubmann; Radovan Seifried
Original assignee: Siemens AG Oesterreich
Current assignee: Siemens Mobility Austria GmbH
Priority date: 2015-03-03
Filing date: 2016-02-18
Publication date: 2017-09-27
Anticipated expiration: 2036-02-18
Also published as: US10766509B2; AT516923A3; PT3221202T; EP3221202B1; PL3221202T3; WO2016139070A1; ES2724627T3; TR201905557T4; AT516923A2; US20180043910A1; CN208585247U

Abstract

The invention relates to a longitudinal support (1) and to a transverse support (18) for a chassis frame of a rail vehicle, wherein the longitudinal support (1) has a first box-shaped connection portion (13) having a sectionally straight first circumferential edge for connection to the transverse support (18). In a transverse direction of the chassis frame, respectively on the end side, the transverse support (18) has a second box-shaped connection portion (24) having a sectionally straight second circumferential edge for connection to the longitudinal support (1). In order to achieve a reduction of the weight of the longitudinal support (1) and of the transverse support (18), and to lower the twisting rigidity of the chassis frame, the first and second circumferential edges are each configured as four first and second connection edges (14, 15, 16). Said connection edges (14, 15, 16) are separated from each other by first and second recesses (17).

Description

description

Side member and cross member for a chassis frame of a rail vehicle

Technical area

The invention relates to a side member for a

Chassis frame of a rail vehicle,

wherein in one, with respect to a longitudinal direction of the

Chassis frame centrally located central portion of the side member a box-shaped first connection portion is provided

wherein the first connection portion for this purpose an opening with a sectionally straight first circumferential edge to

Connection of a cross member of the landing gear frame and wherein the opening opens the first terminal portion normal to the longitudinal direction in a transverse direction of the landing gear frame, and a

Cross member for a chassis frame of a

Rail vehicle comprising a cross member upper flange, a cross member lower flange, and two connecting the cross member upper flange and the cross member lower flange

Side walls,

wherein the cross member relative to a transverse direction of the

Chassis frame seen at each end has a second box-shaped connection portion, which second connection portion a sectionwise straight second

Circumferential edge for connecting a longitudinal member of the

Has landing gear frame.

The invention further relates to landing gear frames, which are composed of such longitudinal and transverse beams.

State of the art

Bogies, also called bogies, of rail vehicles usually have two wheelsets, which on rails are guided, and are connected to car bodies of the rail vehicle. An integral part of a chassis is a chassis frame to which the wheelsets, eg. Via a Radsatzführung or a primary suspension, and the car body, eg. Via a secondary suspension and a device for power transmission, are connected. The power flows between the individual components run mainly on the chassis frame. The chassis frame usually includes two longitudinal beams, which are aligned parallel to a longitudinal direction, which the direction of travel of the rail vehicle in

Operating state corresponds, and one or more

Cross member, which parallel to a normal on the

Longitudinal standing transverse direction is aligned, wherein the embodiment is referred to with a cross member as H-type. The longitudinal members may also be designed as closed by means of headrests frame. The longitudinal members have a central portion which, viewed in the longitudinal direction, is arranged in the middle of the longitudinal members. In this central portion is a first box-shaped connection portion for connection to the

Cross member having an opening which opening is open in the transverse direction, ie to the cross member. Normally, the longitudinal members are designed cranked, so that an end portion of the longitudinal member is aligned parallel to the central portion, wherein the two portions are connected by a transition portion.

The cross member is formed in the H-shape as a box-shaped profile and includes a cross member upper flange, a cross member lower flange and two side walls, each consisting of individual sheets or plate-shaped

Metal parts exist. In a length direction of

Cross member seen which the transverse direction of the

Chassis corresponds to the cross member respectively at the end a second connection portion for connection to one of the longitudinal members.

Most of the cross member is loaded with all main forces, which are passed on the side members in the wheelsets on. The connection of the longitudinal members with the cross member at the connection sections is particularly high

claimed. In order to meet the functional requirements and to provide the specified operational stability, the compound is usually made solid and thus very stiff. This stiff and massive design of the welds, which are usually used for connection, is made by large weld lengths and large

Weld cross sections reached to the small

To compensate for the resistance of the welds. Also known is the use of massive bulkhead plates, which are arranged between the cross member and side member and welded to both. Due to the high rigidity of the connection between

However, the longitudinal beam and cross member is also the Verwinde- rigidity of the chassis frame increases, so an increased resistance to twisting around a parallel to

Transverse transverse axis of the cross member, which leads to a reduced derailment safety, as the verwindesteife chassis frame, for example

different heights of the two rails can not compensate. Another disadvantage of the prior art manifests itself in the high manufacturing and material costs, and by the high weight of the compound, due to the above-described embodiment of the welds or attachment of bulkhead plates.

Object of the invention

It is therefore an object of the invention to overcome the disadvantages of the prior art and a side member as well to propose a cross member for a chassis frame, which the use of high quality and therefore higher

to enable load-bearing welds.

Presentation of the invention

This object is achieved by a side member with the features of claim 1 and a cross member having the features of claim 9. Advantageous embodiments of the invention are defined in the respective dependent claims.

On the one hand, the invention relates to a side member for a chassis frame of a rail vehicle,

wherein in one, with respect to a longitudinal direction of the

Having connection of a cross member of the landing gear frame and wherein the opening opens the first terminal portion normal to the longitudinal direction in a transverse direction of the chassis frame.

According to the invention, it is provided that the first peripheral edge is formed as four rectilinear first connecting edges, which connecting edges are formed by first

Recesses are separated. The peripheral edge is composed in a longitudinal beam according to the invention from those edges which form the outer boundary of the first terminal portion seen in the transverse direction, in other words are those edges, which in those

Normal level lie on the transverse direction, which normal plane limits the maximum extension of the first terminal section in the transverse direction. By a subdivision of

Circumferential edge in four connecting edges are high quality Weld seams between the longitudinal member according to the invention and any cross member to produce. The first

Recesses, which preferably at the corners of

box-shaped first terminal portion are arranged, prevent a collision of two first

Connecting edges, as with a weld in this area, so when colliding two welds, voltage spikes would form. These stress peaks are avoided by the recesses in the corner areas, so that the welds have to be designed for a lower load. This also results in

With regard to the weld cross sections, which can be reduced due to the lower load, the required sheet thickness of the longitudinal beam, which can also be reduced due to the reduced weld cross sections, the straightening effort, which is also reduced due to the reduced weld lengths and cross sections, many positive effects that a Reduction of the total weight of the

Chassis frame and the manufacturing costs.

A variant of the invention provides that the longitudinal member comprises a longitudinal member upper flange and a longitudinal member lower flange, wherein in the first connection portion two side members connecting the longitudinal member upper flange and the longitudinal member lower flange parallel to the transverse direction

are arranged. In any case, since the side member the

Longitudinal member upper flange and the longitudinal beam lower chord comprises, the first connection portion can be easily produced if it comprises a portion of the side member upper belt and side member lower belt and the box shape is formed by two side members. The side elements may be formed, for example, as bulges of side walls of the longitudinal member, although the side member has a box-shaped profile. It is also conceivable that the opening is arranged directly in a side wall of the longitudinal member and thus the side members are formed directly by the side wall itself. If an upper first connecting edge on the longitudinal member upper flange, on the longitudinal member lower flange a lower first connecting edge and on the side elements in each case a lateral first

Connection edge is formed, then in a further embodiment of the invention is a particularly favorable course of the first connecting edges and thus also the

Welds reachable when the first recesses at the imaginary intersections of the first connecting edges

are arranged.

In order to effectively prevent the mutual heat effect of two weld seams attached to adjacent first connecting edges, the first recesses in a further preferred embodiment of the invention cover between 5% and 30%, preferably between 8% and 25%,

in particular between 10% and 20% of the circumference of a rectangle formed by the imaginary extensions of the first connecting edges. Because the first

Connecting edges on a box-shaped first

Terminal section are arranged, are the first

Connecting edges arranged on the circumference of a rectangle. This rectangle thus corresponds to that rectangle which is formed by the imaginary extensions of the first connecting edges, in the normal plane to the transverse direction. By the

Covering of the rectangle by the first recesses, which cover usually divides uniformly on the individual first recesses is, a

Minimum distance between the first connecting edges

ensured. It goes without saying that the first recesses also extend in the transverse direction, wherein the extent of the first recesses in the transverse direction is greater than the covered area of the rectangle. In alternative embodiments of the invention, the first recesses in the region of the first connecting edges, for example by first rod-shaped sections for

Weld extension, narrowed and open in

Seen transversely behind the first connecting edges up to a maximum extent normal to the transverse direction. Fillet welds, ie welds with a triangular cross-section, which are usually attached to a rectangular edge, and are used for example according to the prior art for welding bulkhead plates, with the same amount of used welding material less load than for example

Butt welds, so welds, which connect two blunt ends of sheets and in which the entire, eg.

rectangular section, the weld

is formed vollquerschnittserfassend. It is therefore provided in a preferred embodiment of a longitudinal beam according to the invention that the first connecting edges are formed such that a full cross-section detecting connection with the cross member, preferably by means of a

Butt weld, can be achieved. Apart from the increased load capacity of a full-cross-sectional connection, such can also be easier nachbearbeiten, ie

For example, abrade the sheet metal to remove the

To improve fatigue strength of the welds. Also, such designed connections with all

For example, check by means of penetration test (PT), magnetic particle inspection (MT), ultrasonic test (UT) or radiographic examination (RT).

Since the longitudinal member upper flange and the longitudinal member lower flange are loaded by the forces to be introduced into the longitudinal member higher than the side elements and at the same time the post-processing of the side elements is often easier, provides a further embodiment of the invention that at least 70%, preferably at least 85% , the total area of each of the first recesses lies on one of the side elements. The total area of the first recess refers to that theoretical flat surface which forms the first recess that would be seen if the

corresponding side element by 90 ° in the plane of

Longitudinal member upper belt or longitudinal member lower belt folded so that the side member and side member Upper belt or longitudinal beam lower belt form a common flat surface.

To reduce the torsional stiffness of the longitudinal member and to further reduce the weight is provided in a particularly preferred embodiment of a longitudinal beam according to the invention, that the longitudinal member is formed as I-beam and the side elements inserted into the I-beam, preferably welded, are. Both

Side elements are separately manufactured sheet metal parts, which preferably the entire space of

Bridge longitudinal member between longitudinal member upper flange, side member lower flange and a bridge. Such trained side elements are preferably connected by means of welds with the elements of the longitudinal member.

A further reduction in weight is achieved in a further embodiment in that the side elements have at least one side opening spaced from the first connection section.

The invention also relates to a cross member for a chassis frame of a rail vehicle, comprising a cross member upper flange, a cross member lower flange, and two side walls connecting the cross member upper flange and the cross member lower flange,

wherein the cross member relative to a transverse direction of the chassis frame seen at the end each having a second box-shaped connection portion, which second connection portion a sectionwise just second

Circumferential edge for connecting a longitudinal member of the

Has landing gear frame.

According to the invention it is provided that the second

Circumferential edge as four rectilinear second

Connection edges is formed, which second

Connection edges are separated by second recesses. The peripheral edge sits down at a Cross beams according to the invention from those edges, which form the outer boundary of the second connecting portion seen in the transverse direction, in other words are those edges which lie in the normal plane to the transverse direction, which normal plane the maximum

Extension of the second terminal portion limited in the transverse direction. By dividing the peripheral edge into four connecting edges, high-quality weld seams can be produced between the cross member according to the invention and any longitudinal member. The second recesses, which are preferably arranged at the corners of the box-shaped second connection section, prevent abutment of two second connecting edges, since when welding in this region, ie when abutting two

Welds, spikes would form. This results in a cross member according to the invention the same advantages as previously described for the side member.

An embodiment variant of a cross member according to the invention provides that an upper second connecting edge is formed on the cross member upper flange, a lower second connecting edge on the cross member lower flange and a lateral second connecting edge on the side walls, wherein the second recesses are arranged at the imaginary intersections of the second connecting edges are. As a result, a particularly favorable and easy to produce course of the second connecting edges and thus the welds can be achieved.

In order to effectively prevent the mutual heat effect of two weld seams attached to adjacent second connecting edges, in a further preferred embodiment variant of the invention the second cutouts cover between 5% and 30%, preferably between 8% and 25%,

in particular between 10% and 20% of the circumference of a rectangle formed by the imaginary extensions of the second connecting edge. Because the second

Connecting edges on a box-shaped second

Are arranged connecting portion, the second Connecting edges arranged on the circumference of a rectangle. This rectangle thus corresponds to that rectangle, which arises through the imaginary extensions of the second connecting edges, in the normal plane to the transverse direction. By the

Covering of the rectangle by the second recesses, which overlaps are usually evenly divided on the individual second recesses, is a

Minimum distance between the second connecting edges

ensured. It goes without saying that the second recesses extend in the transverse direction, wherein the extension of the second recesses in

Transverse direction is greater than the covered area of the

Rectangle. Here, in alternative embodiments of the invention, the second recesses in the region of the second connecting edges, for example, narrowed by second rod-shaped sections for weld extension, and open seen in the transverse direction behind the second

Connecting edges up to a maximum extent normal to the transverse direction.

As fillet welds, so welds with a triangular cross-section, usually the previously discussed

Disadvantages is in a preferred

Embodiment variant of a cross member according to the invention provided that the second connecting edges such

are formed, that a full cross-sectional sensing

Connection with the longitudinal beam, preferably by means of a butt weld, can be achieved. Apart from the increased load capacity of a full-cross-sectional connection, such can also be easier nachbearbeiten, ie

For example, abrade the sheet metal to remove the

Check known test methods.

Due to the easier post-processing of the second

Connecting portions of the cross member, compared with that of the longitudinal member, is an approximately uniform distribution of Recess on two adjacent elements of the

Cross member, so for example. Cross member upper flange and side wall, possible. Therefore, in another preferred

Embodiment variant of a cross member according to the invention provided that between 35% and 60% of the total area of each of the second recesses lies on one of the side walls and the rest of the total area on the respective cross member upper flange or cross member lower flange. The total area of the second recess refers to that plane the second recess forming surface, which would be seen if the corresponding side wall by 90 ° in the plane of

Crossbeam Obergurts or the cross member lower chord is folded, so that side wall and cross member upper flange or

Cross member lower flange form a common flat surface.

To reduce the torsional stiffness of the cross member and thus the Verwinde stiffness of the entire chassis frame, is in a particularly preferred

Embodiment variant of the invention provided that the

Cross member is formed as a bent part, wherein between the side walls and the cross member upper flange and between the side walls and the cross member lower flange each one

Bending area is formed. Bending parts are known in a bending process, also known as Abkantverfahren,

prepared by plastically deformed by introducing a bending moment in a flat green body, the so-called unwinding or Blechabwicklung, the green body and thus brought into a two- or three-dimensional shape.

Suitable manufacturing methods are, for example, the die bending or the swivel bending. Those areas that are plastically deformed are called bending areas and are characterized by a homogeneous and favorable

Voltage curve off.

Trained as a bending member cross member, wherein the bent part can also put together from several bent sections, therefore, has a particularly favorable

Voltage curve, because instead of the edge between cross member Upper belt and side wall, which is connected in the prior art by means of weld, the bending region connects the cross member upper flange and the first side wall.

The same applies analogously for the connection of the cross member upper flange and the second side wall, or cross member lower flange and first and second side wall. The

Bending areas refer to the respective plastically deformed, preferably curved, areas of the

Crossbeam. Due to the favorable voltage curve, on the one hand, the thickness of the sheet, from which the cross member is made, can be reduced and, on the other hand, no fillet welds are required for connection, so that in comparison to the prior art both weight is saved and the twisting stiffness is reduced ,

Another particularly preferred embodiment of the invention provides that the cross member at least on

Cross member upper flange and on the cross member lower flange one

Belt opening, wherein at least one of the belt openings occupies at least 50% of the surface of the cross member upper belt or the cross member lower belt. Due to the relatively large belt opening, the torsion stiffness of the cross member is lowered even further, to a much improved

Derailment of the rail vehicle to achieve.

The object set in the beginning is also solved by a chassis frame for a rail vehicle, with two

inventive longitudinal beams and one the two

Cross member connecting longitudinal members according to the invention, wherein each of the second connection portions of the cross member is connected to a first connection portion of a longitudinal member. In one embodiment of the chassis frame according to the invention is therefore intended that the first

Connecting edges of the side members are connected to the respective second connecting edges of the cross member by means of a weld. By the previously described in detail

Design of the connecting edges arise in the

Combination of a cross member according to the invention with two inventive longitudinal beams, a number of advantageous effects:

The rectilinear connecting edges and the

interposed recesses allow connection of the first terminal portions to the second

Connecting sections with welds, which are strictly rectilinear and not adversely affected by heat.

By the formation of the welds as

full cross-sectional connections, preferably as butt welds, both weld cross-section and weld length, and the sheet thickness of the cross member and at least the first connection portion of the longitudinal member can be reduced.

If the side members are designed as I-beams and if the cross member is designed as a bent part, the result is a chassis frame with low torsional rigidity and thus high safety against derailment.

If a belt opening is provided in the cross member upper belt or in the cross member lower belt, which occupies at least 50% of the surface of the cross member upper belt or the cross member lower belt, this belt opening can serve as an access opening for

Processing methods are used. So can the

Weld seams welded back between the connecting edges and aftertreated on both sides, for example ground. Thus, on the one hand, the problem of corrosion is solved so that the belt openings do not have to be closed. On the other hand, the fatigue strength is greatly increased by the post-treatment and counter welding of the welds.

In addition, a repair of the welds on

Chassis frame possible or with much less

Expenses connected, as in generic chassis frame. Brief description of the figures

To further explain the invention, reference is made in the following part of the description to the figures, from which further advantageous embodiments, details and further developments of the invention can be found. The figures are to be understood as exemplary and should the

Outline invention character, but do not constrict it or even conclude. Show it:

Fig. 1 is an axonometric view of an inventive

Chassis frame;

Fig. 2 is a detail view of the connection between

Side member and cross member;

Fig. 3 is an axonometric view of a cross member.

Embodiment of the invention

FIG. 1 shows a three-dimensional representation of a

Embodiment of a chassis frame according to the invention for a rail vehicle. This includes two

Side members 1, which are aligned parallel to a longitudinal direction 11, and a cross member 18 connecting the two side members 1, which is parallel to a normal to the longitudinal direction 11 transverse direction 12th

is aligned. The longitudinal direction 11 corresponds to the direction of travel of the rail vehicle in the operating state.

The longitudinal members 1 are formed as I-beam and thus have a longitudinal beam upper flange 2, a longitudinal beam lower flange 3 and the two symmetrically connecting web 4 (see Fig. 2). A cranked form of the

Longitudinal member 1 is given by this one

Central portion 7 and, in each case in the longitudinal direction 11 in front of and behind the central portion 7, an end portion 9 parallel to the central portion 7, which portions 7,9 by a sloping transition section. 8

are connected. In the central portion 7 of the longitudinal member 1 while the longitudinal member upper flange 2 and run

Side member lower flange 3 parallel to each other. The connection between the cross member 18 and the longitudinal member 1 takes place on the side of the longitudinal member 1 via a arranged in the central portion 7 first box-shaped connection portion 13. The first connection portion 13 is thereby of side member upper flange 2, side member lower flange 3, and two

Side elements 5 formed and opens in the transverse direction 12 to the cross member 18 out.

To connect the landing gear frame with a wheel set guide, each longitudinal member 1 has two Radsatzführungsbuchsen 29, which have a circular cross section and the

Recording a bolt serve the Radsatzführung. The

Longitudinal axes of the wheel set guide bushes 29 are aligned parallel to the transverse direction 12. The cross member 18 is formed in the present embodiment as a one-piece box-shaped bent part, which seen in the transverse direction 12 each end forms a second box-shaped connection portion 24. The second connection sections 24 of the cross member 18 are in each case connected via welds, in particular butt welds, with the respective first connection section 13 of a longitudinal member 1.

FIG. 2 shows an enlarged detail of the first connection section 13, wherein a part of the second connection section 24 of the cross member 18 can also be seen. For the sake of clarity, however, only the relevant parts of the first connection section 13 are in this figure

for the second connection section 24, reference is made to FIG. It can be clearly seen that the

Side elements 5 are aligned substantially parallel to the transverse direction 12 and with the side member upper flange 2,

Side member lower flange 3 and the web 4 by not illustrated welds are connected. The

Side elements 5 have in the region of the web 4 a spaced from the web side opening 6, which has the shape of a triangle with rounded edges, wherein the longest edge of the triangle is parallel to the web 4. A

Opening 10 of the first connection section 13, which is formed by the longitudinal member upper flange 2, the longitudinal member lower flange 3 and the side elements 5, thereby opens the first

Connecting portion 13 in the transverse direction 12th

A peripheral edge of the first connection section 13, that is to say that edge which lies in a normal plane of the transverse direction 12 and makes contact with the cross member 18, is composed of four first connecting edges 14, 15, 16: an upper first one

Connecting edge 14, which from the longitudinal member upper flange. 2

is formed, a lower first connecting edge 15, which is formed by the side member lower flange 3, and two lateral first connecting edges 16, which is formed by a respective one of the side members 5. The first

Terminal edges 14,15,16 are by first

Recesses 17 separated from each other, so that the first connecting edges 14,15,16 run only rectilinear and do not touch each other. Arranged are the first recesses 17 at the imaginary intersections of

Extensions of the first connecting edges 14,15,16, in other words at the corners of an imaginary rectangle on which the first connecting edges 14,15,16 lie.

Relative to the circumference of the imaginary rectangle, the first recesses 17 cover about 17.5% of the circumference. The first recesses 17 also extend in

Transverse direction 12, wherein in the side elements 5 results in a substantially U-shaped form, which accounts for about 80% of the total area of the first recess 17. In the region of the first connecting edges 14,15,16, the recess 17 is narrowed, since the side members 5 for extending the first lateral connecting edge 16 and the weld attached thereto, first rod-shaped portions 30 which in the direction of the longitudinal member upper belt 2 or the longitudinal beam lower belt 3 or parallel to a height direction, normal to the longitudinal direction 11 and transverse direction 12, are aligned. Seen in the transverse direction 12 behind the first rod-shaped

Sections 30, the first recess 17 is increased in the height direction, so that the first rod-shaped portions 30 by an undercut of the first lateral

Connecting edge 16 arise. Analogously, it is of course also conceivable that the upper first terminal edge 14 or the lower first terminal edge 15 also a further first rod-shaped portion for extending the

Form welds that are aligned parallel to the longitudinal direction 11. Figure 3 shows a cross member 18 with box-shaped profile, wherein the cross section is normal to the transverse direction 12. The cross member comprises a cross member upper flange 19, which faces a car body of a rail vehicle in the installed state, a cross member lower flange 20, which faces the rails in the installed state, and two

Sidewalls 21, which are the left and right sides of the

Train cross member. Seen in the transverse direction 12, the cross member 18 at each end, ie at the front and rear ends, a second connection portion 24. These second connection sections 24 serve to connect the

Cross member 18 to one longitudinal beam 1. It is in the second connection portions 24 in

present example around the open ends of the box-shaped cross member 18th

To a favorable voltage curve in the cross member too

reach, is the cross member 18 as a bent part, in

present case as a one-piece bent part formed. By a corresponding manufacturing process,

For example, folding, swivel bending or Gesenkbiegen, the box-shaped profile of the cross member 18 is made from a flat settlement by means of a

introduced bending moment the settlement locally plastic is deformed, so that from the substantially

two-dimensional development forms a three-dimensional shape. By such a manufacturing process, the following positive effect results: Since it is the bending part is a single part, which is both cross member upper flange 19, cross member lower flange 20 and the

Side walls 21 forms, is only one more

Connection weld needed to the box profile

manufacture. This connection weld is included

Preferably arranged outside the bending regions 22, for example, it runs parallel to the transverse direction 12 in the middle of the cross member lower belt 20th

The exact structure is now explained in more detail on the example of the cross member upper belt 19: At the transition between the

Cross member upper flange 19 and the right side wall 21 forms a bending region 22 in that area, which was plastically deformed in the manufacturing process. Of the

Bending region 22 represents a curved region, which in the present example is designed as a transition radius with a bending radius. It is in the bending radius to a circle radius, in alternative embodiments, curves with different

Curvature, for example ellipses, are conceivable.

Similarly, a bending region 22 is also formed between the cross member upper flange 19 and the left side wall 21. Completely analogously, bending regions 22 in the same shape are also formed at the transition between side walls 21 and the cross member lower flange 20, so that the cross section of the cross member has the shape of a rectangle with rounded corners normal to the transverse direction 12.

A peripheral edge of the second connecting portion 24, ie that edge which lies in a normal plane of the transverse direction 12 and contacts the longitudinal member 1, is composed of four second connecting edges 25, 26, 27: an upper second connecting edge 25, which extends from the cross member upper flange 19

is formed, a lower second connecting edge 26, which is formed by the cross member lower flange 20, and two lateral second connecting edges 27, which is formed by each one of the side walls 21. The second

Connecting edges 25,26,27 are by second

Recesses 28 separated from each other, so that the second connecting edges 25,26,27, as well as the first

Connecting edges 14,15,16, run only straight and do not touch each other. Arranged are the second recesses 28 at the imaginary intersections of

Extensions of the second connecting edges 25,26,27, in other words at the corners of an imaginary rectangle on which the second connecting edges 25,26,27 lie.

Relative to the circumference of the imaginary rectangle, the second recesses 28 cover about 17.5% of the circumference. The second recesses 28 also extend in

Transverse direction 12, starting from the second

Connecting edges 25,26,27 towards the center of the

Crossbeam 18. Now consider a theoretical one

Condition in which the cross member upper flange 19 and the side walls 21 form a flat surface, ie the theoretical state in which the side walls 21 are folded in the direction of the cross member upper belt 19 by 90 °, the upper second connecting edge 25 and the lateral second

Connecting edges 27 along a to the transverse direction 12th

aligned parallel width direction. In this

theoretical state, the second recesses 28 form a semicircular shape, which in

Width direction at least over the bending region 22nd

extends. The second recesses 28 are approximately equally divided on cross member upper flange 19 and cross member lower flange 20 and the respective side wall 21. Since the second recesses 28 in the region of the second

Connecting edges 25,26,27 are narrowed, so form second rod-shaped sections 31, which serve as an extension of the second connecting edges 25,26,27 and the welds attached thereto. The second rod-shaped sections 31 form an inner edge of the semicircular area of the second recesses 28. The same applies of course to a second theoretical state in which the

Side walls 21 are folded in the other direction and form with the cross member lower flange 20 a common flat surface.

Referring now to Figure 2 with respect to the first and second recesses 17, 28, it will be seen that the first and second recesses 17, 28 form a common recess whose edges merge into one another, with the first and second rod-shaped portions 30, 31 protrude into the common recess.

In Figure 3 it can also be seen that the cross member upper flange 19 has a belt opening 23 which has a substantially rectangular shape, wherein curves and

Constrictions are provided in the form. The

Belt opening 23 is aligned symmetrically to the cross member upper flange 19 both in the longitudinal direction 11 and in the transverse direction 12, taking about 30% of the surface of the

Crossmember Obergurts 19 one. Also, the cross member lower flange 20 has a belt opening 23 which is aligned both in the longitudinal direction 11 and in the transverse direction 12 symmetrical to the cross member lower flange 20. However, this is

Belt opening 23 formed elliptical and occupies about 75% of the surface of the cross member lower belt 20, so that the cross member lower flange 20 has a lower shear stiffness and torsional stiffness than the cross member upper flange 19. On the side walls 21, four further belt openings 32 are also arranged in each case.

In particular, the belt opening 23 of the cross member lower belt 20 serves as an access opening for processing, as through this the welds, which are the first

Terminal edges 14,15,16 and the second

Connecting edges 25,26,27, preferably by means

full-cross-section butt welds, connect with each other both welded on both sides and accordingly reworked, abraded about on both sides of the weld blecheben can be.

List of reference numbers:

1 longitudinal member

2 side member upper flange

3 side member lower flange

4 footbridge

5 page elements

6 side opening

7 central section

8 transition section

9 end section

10 opening

11 longitudinal direction

12 transverse direction

13 first connection section

14 upper first connecting edge

15 lower first connecting edge

16 lateral first connecting edge

17 first recess

18 cross members

19 cross member upper flange

20 crossbar lower chord

21 sidewall

22 bending area

23 belt opening

24 second connection section

25 upper second connecting edge

26 lower second connecting edge

27 lateral second connecting edge

28 second recess

29 wheel set guide bushing

30 first rod-shaped sections

31 second rod-shaped sections

32 more belt opening

Claims

claims

1. longitudinal member (1) for a chassis frame of a

Rail vehicle,

wherein in one, with respect to a longitudinal direction (11) of the chassis frame centrally located central portion (7) of the longitudinal member (1) a box-shaped first

Connecting portion (13) is provided,

wherein the first connection section (13) for this purpose

Having opening (10) with a sectionally straight first circumferential edge for connecting a cross member (18) of the chassis frame and

wherein the opening (10) opens the first connection portion (13) normal to the longitudinal direction (11) in a transverse direction (12) of the chassis frame,

characterized in that

the first peripheral edge is designed as four rectilinear first connecting edges (14, 15, 16), which connecting edges (14, 15, 16) are separated from one another by first recesses (17).

Second longitudinal beam (1) according to claim 1, characterized in that the longitudinal carrier (1) comprises a longitudinal member upper flange (2) and a longitudinal member lower flange (3), wherein in the first connection portion (13) has two the Längsträger-

Upper belt (2) and the longitudinal beam lower belt (3) connecting Side elements (5) parallel to the transverse direction (12)

are arranged.

Longitudinal member (1) according to claim 2, characterized in that the longitudinal member upper flange (2) has an upper first

Connecting edge (14), on the side member lower flange (3) has a lower first connecting edge (15) and to the

Side elements (5) each have a lateral first

Connecting edge (13) is formed, wherein the first recesses (17) at the imaginary intersections of the first connecting edges (14,15,16) are arranged.

Side member (1) according to one of claims 1 to 3, characterized in that the first recesses (17) between 5% and 30%, preferably between 8% and 25%, in particular between 10% and 20%, of the circumference of the

imaginary extensions of the first

Connecting edges (14,15,16) formed rectangle

cover up.

Side member (1) according to one of claims 1 to 4, characterized in that the first connecting edges (14,15,16) are formed such that a

full cross-section detecting connection with the cross member, preferably by means of a butt weld, can be achieved.

6. longitudinal beam (1) according to one of claims 2 to 5, characterized in that at least 70%, preferably at least 85%, of the total area of each of the first recesses (17) on one of the side elements (5).

7. longitudinal member (1) according to one of claims 2 to 6, characterized in that the longitudinal carrier (1) is designed as I-beam and the side elements (5) inserted into the I-beam, preferably welded, are.

8. longitudinal member (1) according to claim 7, characterized in that the side elements (5) at least one of the first connection portion (13) spaced side opening (6).

9. Cross member (18) for a chassis frame of a

Rail vehicle comprising a cross member upper flange (19), a cross member lower flange (20), and two side walls (21) connecting the cross member upper flange (19) and the cross member lower flange (20),

wherein the cross member (18) relative to a

Transverse direction (12) of the chassis frame end seen in each case a second box-shaped

Connecting portion (24), which second

Connection section (24) a sectionwise straight second

Circumferential edge for connecting a longitudinal member (1) of the

Has chassis frame, characterized in that

the second peripheral edge is designed as four rectilinearly extending second connecting edges (25, 26, 27), which second connecting edges (25, 26, 27) are formed by second ones

Recesses (28) are separated.

10. Cross member (18) according to claim 9, characterized in that the cross member upper flange (19) has an upper second

Connecting edge (25) on the cross member lower flange (20) has a lower second connecting edge (26) and on the

Side walls (21) each have a lateral second

Connecting edge (27) is formed, wherein the second recesses (28) at the imaginary intersections of the second connecting edges (25,26,27) are arranged.

11. Cross member (18) according to claim 9 or 10, characterized

characterized in that the second recesses (28)

between 5% and 30%, preferably between 8% and 25%, in particular between 10% and 20%, of the circumference of one of the imaginary extensions of the second

Connecting edges (25,26,27) formed rectangles

cover up.

12. Cross member (18) according to claim 11, characterized

characterized in that the second

Connection edges (25,26,27) are formed such that a full cross-section detecting connection with the Longitudinal support (1), preferably by means of a butt weld, can be achieved.

13. Cross member (18) according to any one of claims 9 to 12,

characterized in that between 35% and 60% of the total area of each of the second recesses (28) lies on one of the side walls (21) and the remainder of the total area on the respective cross member upper flange (19) or

Cross member lower flange (20).

14. Cross member (18) according to one of claims 9 to 13,

characterized in that the cross member (18) as

Bending part is formed, wherein between the

Side walls (21) and the cross member upper flange (19) and between the side walls (21) and the cross member lower flange (20) each have a bending region (22) is formed.

15. Cross member (18) according to any one of claims 9 to 14,

characterized in that the cross member (18) at least on the cross member upper flange (19) and the cross member lower flange (20) has a belt opening (23), wherein at least one of the belt openings (23) at least 50% of

Surface of the cross member upper belt (19) and the cross member lower belt (20) occupies.

16. Chassis frame for a rail vehicle, with two

Side members (1) according to one of claims 1 to 8 and a crossbeam (18) connecting the two longitudinal members (1) according to any one of claims 9 to 15, wherein each of the second connecting portions (24) of the

Cross member (18) with a first connection portion (13) of a longitudinal member (1) is connected.

17. Chassis frame according to claim 16, characterized

in that the first connecting edges (14, 15, 16) of the longitudinal members (1) are connected to the respective second ones

Connecting edges (25,26,27) of the cross member (18) are connected by a weld.

18. chassis frame according to claim 17, characterized

characterized in that the welds as a

full cross-sectional connection, preferably designed as butt welds.