EP3197743A1

EP3197743A1 - Chassis frame with spring cup

Info

Publication number: EP3197743A1
Application number: EP15757163.9A
Authority: EP
Inventors: Christian KARNER; Radovan Seifried
Original assignee: Siemens AG Oesterreich
Current assignee: Siemens Mobility Austria GmbH
Priority date: 2014-09-22
Filing date: 2015-08-12
Publication date: 2017-08-02
Also published as: US20170291618A1; AT516364A1; CN107107924A; WO2016045864A1; CN107107924B; RU2669659C1; US10457298B2

Abstract

The invention relates to a chassis frame for a bogie of a rail vehicle, comprising at least one longitudinal member (1) with an upper chord (2) and a lower chord (3). The longitudinal member (1) has at least one end portion (4), a central portion (6), and a transition portion (5) lying between the end portion and the central portion, said end portion (4) of the longitudinal member (1) being designed as a spring cup (8) for receiving a primary spring. The aim of the invention is to improve the rigidity curve between the spring cup (8) and the transition portion (5). This is achieved in that the lower chord (3) has a curvature (9) in the region of the transition portion (5), said curvature being designed such that the imaginary extension of the lower chord (3) and the upper chord (2) itself or the imaginary extension of the upper chord (2) intersect in the end portion (4).

Description

description

Chassis frame with spring pot

Technical area

The invention relates to a chassis frame for a

Bogie of a rail vehicle, comprising at least one side rail comprising a top flange and a bottom flange, wherein the side rail at least one end portion, a central portion and an intermediate therebetween

Transition portion, wherein the end portion of the

Längsträger as a spring pot for receiving a

Primary suspension is formed.

The chassis frame usually has two parallel

to each other arranged side members. Each side member usually has a central portion to which closes on both sides depending on a transition section and to a

Transition section each includes an end section. The invention is both for bogies with straight

Longitudinal beams, where therefore the upper flange in all sections is usually substantially in one plane, suitable as well as for bogies with cranked side members. When cranked

Longitudinal members of the transition section forms the crank.

State of the art

Bogies for rail vehicles are usually used to store railcars or wagons and connect to the rails. A bogie therefore has as a central element on a chassis frame, which has a conventional manner a primary suspension for transmitting the forces in a rail contacting the wheelset and a secondary suspension for storage of the wagon or railcar. The suspensions serve for Reduction or damping of the resulting vibrations and allow a smooth running of the wheels at different speeds and Streckengegebenheiten such as cornering or a straight section.

Chassis frames must therefore be designed so that they like the high loads and attacking forces

For example, can withstand weight or inertial forces without plastic deformation occur. Therefore, chassis frame against high resistance moments

Bends and torsion on. In practice this will be

Behavior usually by a welded construction

reached, which is a cross member and two at the

Includes longitudinal members disposed end regions of the cross member. The side members can be executed cranked, thereby being offset in the direction of the rails

Central portion forms, which is connected to the cross member. On both sides starting from the central portion, a transitional section is formed, which is angled only when the longitudinal members are bent, and subsequently thereto, essentially parallel to the central section (in the case of bent longitudinal members) or at the same height

located (for straight side members) end portion for receiving the primary suspension.

To record the primary spring forming cylinder springs, Flexicoil springs or laminated springs are the

End portions of the longitudinal member designed as spring pots. A spring cup serves to center the spring and to introduce forces into the spring, at the same time limiting the maximum deflection of the spring in the radial direction.

Therefore, the spring cup usually has a circular, oval or rectangular cross section and is in the direction of the wheelset, so in an operating position downwards, open, so that forms an open profile in cross section. The transition from the cross section, e.g. one

closed box cross-section of the longitudinal member in the region of the central portion and the transition portion to open cross section of the spring cup is of particular importance because it is a highly loaded area, which is further weakened by the attachment of welds, especially since the stresses in the welds must be kept low.

A disadvantage of the prior art is therefore that elaborate production engineering measures must be taken, such as the attachment of

Access openings with lids to welds in the

to be able to attach loaded zones. Another disadvantageous solution is to locate the relevant sites locally

oversize, which increases the weight and the

Increase material costs.

Object of the invention

It is therefore an object of the invention to provide a chassis frame for a bogie of a rail vehicle, which overcomes the disadvantages of the prior art and forms an optimized transition between the transition portion and the end portion, so that the

Stiffness profile between the spring cup forming end portion and the transition portion is improved. Furthermore, the invention should be characterized by a small

Cost of materials, low production costs and a

distinguish advantageous course of the welds.

Presentation of the invention

We accomplish this task through a chassis frame for a

Bogie of a rail vehicle solved with the features of claim 1. Advantageous embodiments of the invention are defined in the respective dependent claims. The invention relates to a chassis frame for a

Transition portion, wherein the end portion of the

Längsträger as a spring pot for receiving a

Primary suspension is formed. It is inventively provided that the lower flange has a curvature in the region of the transition section, which is designed such that the imaginary

Extension of the lower flange and the upper flange itself or the imaginary extension of the upper flange in the end section

to cut.

By providing a curvature, which may be circular arc, elliptical or convex, the

Power flow initiated optimally in the lower belt. Such an introduction is achieved in that the lower flange is guided by the curvature in the direction of the upper flange, whereby the lower flange is connectable, in particular weldable, at its end edge to the upper flange. In a further consequence, the transitional portion is understood to be the region up to which the lower flange is guided. The over the spring pot

initiated force or force to be introduced into the spring cup, is thereby also in the transition between the end portion and

Transition section optimally in upper and lower belt

initiated.

The top flange of the longitudinal member usually forms at the end facing the end of an area which is parallel to the central portion (with cranked

Side member) or just continues from the central section via the transition section to the end section (in the case of a straight longitudinal member). In this case, the extension of the lower flange, ie the imaginary extension of that end of the lower flange, which faces away from the central portion, cuts, the upper belt in just that parallel or even area. At this interface, for example, run a weld through which upper and lower flange are connected. Since the point where the two straps each other

cut, the beginning of the Enabschnittes forms, is the intersection in just that end.

In alternative embodiments, however, it may be provided that the upper flange and the lower flange are not directly connected to each other, but another element is arranged in the transition section on the upper flange, which extends the upper flange. In this case, the cuts

Extension of the lower chord, as described above, not the upper chord itself, but only the imaginary extension of the upper chord. The point of intersection lies either at the beginning of the end section, should the upper belt despite everything one

have parallel portion, or it is located in an area above the end portion, the upper flange should end even in the angled region of the transition portion of a cranked longitudinal member. The actual connection, in particular welding, of the lower belt with the upper belt thus takes place via the further element, which acts as a connecting element between the two belts. In a further embodiment of a chassis frame according to the invention it is provided that the end of the lower flange and the end of the upper flange include an angle, which angle is in a range of 60 °, preferably 70 °, more preferably 80 °, to 90 °. Of course, the adjusting angle also refers to the imaginary extensions of the ends of the straps, should the lower flange not be connected directly to the upper flange. In any case, the angle refers to the acute angle which usually forms at the end of the transition section between the upper and lower chords. By the confluence of the

Untergurtes at an acute angle or right angle, a particularly favorable flow of power and an advantageous attachment of a weld, resulting on the each blunt side of the angle, ie the externally accessible side, is arranged.

Very good mechanical properties, as required in the task set out above, are achieved in that the longitudinal member in the transition section at least

Sectionally having a first cross-section, wherein the first cross-section either as a closed

Box cross-section is formed, which consists of a

Upper belt, a lower flange and the two straps connecting side elements, which are welded together, or is designed as an I-profile, which consists of a top flange, a bottom flange and one of the two straps

connecting web exists.

To increase the length of the welds and the

To outsource weld ends from the heavily loaded zones sees a preferred embodiment of a

According to the chassis frame according to the invention that the spring cup comprises a spring base for receiving the primary suspension and a jacket for partially housing the primary suspension, wherein the jacket of the spring cup has at least one extension, which extension at least partially contacted a curvature having portion of the lower flange. The jacket of the spring cup can be constructed from a single plate-shaped element or from a plurality of interconnected, preferably

welded, plates exist. At least in sections, the jacket forms a cross-section which completely surrounds the primary suspension and a movement of the primary suspension in a direction normal to one

Main spring direction limited.

About the extension, which is due to the curvature of the

Untergurtes clings and therefore usually in

Direction of the central portion tapers, on the one hand extends the weld between the lower flange and the jacket of the spring cup, whereby the cross section of Weld compared to the prior art can be reduced. On the other hand, the weld does not end in a heavily loaded area in this case, which has a positive effect on the strength behavior. Also positive affects the extension as a stiffening element on the

Resistance torque of the longitudinal member against bending off.

According to a further preferred embodiment of a chassis frame according to the invention, the lower flange forms the jacket of the spring cup at least in sections.

In particular, the portion of the curvature having the

Bottom belt is suitable for forming a side surface of the shell. On the one hand, this leads to one

Material savings and on the other hand to a reduction in welds, which has a reduction in manufacturing costs.

Since in the operating state in the lower flange in the region of the curvature tensile stresses can occur, which can load the weld between extension and lower flange, provides a further preferred embodiment of a

According to the chassis frame according to the invention that the extension of the spring cup the lower flange - additionally or alternatively - contacted in a non-curved section, which

Section facing the central portion of the longitudinal member. The extension is thus led beyond the curvature. In the contact region of the extension is directly connected to the lower flange and / or with another element of the chassis frame, such as a Radsatzführung, preferably welded.

In order to achieve a particularly simple construction and production, is in a further embodiment

provided that the upper flange forms the spring base.

In a particularly preferred embodiment of a chassis frame according to the invention, the spring base is a plate-like element, which at least with the upper flange connected is. Due to the design of the spring plate by a separate plate-like element, this may have a greater thickness than the upper flange and the lower flange to accommodate a high load can. As a result, the upper flange or lower flange itself, which have a lower load, because they are divided into two straps, can have a smaller wall thickness, so that the weight of the upper

Overall chassis frame reduced. Another particularly advantageous embodiment provides that the spring base for connection to the upper flange and the lower flange has a fork-like connection portion. In order to initiate the forces absorbed by the spring base evenly in upper and lower belt, without losing the strong

To load loaded transition between spring floor directly with a weld, is the fork-like

Connection portion formed such that at least one fork-like extension projects beyond the top flange and contacted at least in sections, to connect the spring base to the top flange, preferably to weld and at least one other fork-like extension projects beyond the bottom flange, this in the region of the transition section

contacted at least in sections, in order to connect the spring base to the lower flange, preferably to be welded.

Brief description of the figures

To further explain the invention, reference is made in the following part of the description to the figures, from the further advantageous embodiments, details and

Developments of the invention can be seen. 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 a side view of a chassis frame according to the

State of the art Fig. 2 is a bottom view of a chassis frame according to the prior art

Fig. 3 is a side view of an embodiment of a chassis frame according to the invention

Fig. 4 is a view of the underside of an inventive

chassis frame

5 shows a cross section through a side member of a

inventive chassis frame according to the line

AA from FIG. 3

Fig. 6 is an illustration of a bogie with a

inventive chassis frame

Fig. 7 is an axonometric view of an alternative

Embodiment of an inventive

chassis frame

Fig. 8 is a further axonometric view of a

alternative embodiment of a

inventive chassis frame

Embodiment of the invention

Figures 1 and 2 show a cranked side member 1 of a chassis frame for a bogie according to the prior art comprising a top flange 2 and a bottom flange 3. The longitudinal beam 1 in this case has a down in operation central portion 6, on which a

Cross member 13 is arranged. Starting from the

Central section 6 form two angled to the central portion transition sections 5, each open in an end portion 4, which end portions 4 extend substantially parallel to the central portion 6. As a result, only one side of the longitudinal member 1 will be described in more detail, with the statements of course also apply to the other side.

Upper flange 2 and lower flange 3 extend in the central section 6, over a large part of the transition section 5 and in the End section 4 approximately parallel and are connected by not shown side walls together to form a closed first, here box-shaped, cross-section 7, see Fig. 5. The end portion 4 forms a spring cup 8, which for receiving a primary suspension,

For example, a cylindrical spring, a Flexicoil spring or a laminated spring, the bogie is used. Of the

Spring cup 8 comprises a spring base 10 on which the primary suspension rests and through which spring base 10, the primary suspension is centered. In addition, the includes

Spring cup 8 also has a jacket 11 which surrounds the primary suspension in the region of the end section 4 of the longitudinal member 1.

In order to record the primary suspension in the spring cup 8, the lower flange 3 is guided in the end section 4 only to the shell 11 of the spring cup 8 and surrounds the shell 11 at least along a portion of the lateral surface. In other

Embodiments of the lower flange 3 is designed as a support for the shell 11 and engages under this at least in sections, the lower flange 3 in this case has a recess through which the primary suspension enters the spring cup 8. There are a lot of others

Embodiments, which are not discussed in more detail, since they all have the same problem:

In the transition region to the spring cup 8, the cross section of the closed box-shaped cross-section 7 (see Fig. 5) changes to an open cross section, which is due to the inclusion of the primary suspension. This raises an abrupt and unfavorable change in the stiffness of the longitudinal member 1, wherein the attachment of

Welds to connect the spring cup 8 and its coat 11 with the upper flange 2 or lower flange 3, has a negative impact on this course. The ends of the welds are particularly vulnerable zones and are located in the

described embodiment in the highly stressed

Section between spring cup 8 and the transition section 5 of the longitudinal member first Fig. 2 shows an alternative view of the above described embodiment of a chassis frame according to the prior art, wherein the primary suspension receiving side of the chassis frame is shown. In this case, in particular, the cross member 13 connected to the central portion 6 of the longitudinal member 1 can be seen. It can also be seen from this figure that the jacket 11 of the spring cup 8 a

rectangular in cross section, at the corners

is rounded off, as well as the partial enclosure of the

Mantels 11 through the lower chord 3.

Figures 3 to 6 now refer to a

Embodiment of a chassis frame according to the invention. The longitudinal member 1 also has a central portion 6, two end portions 4 and two transition portions 5 and is connected in the central portion 6 with a cross member 13. The differences in the definition of the sections are discussed below.

In Fig. 3 it can be clearly seen that the lower flange 3 according to the invention has a curvature 9, which is designed such that the lower flange 3, the box-shaped

Section 7 in the transition section 5 closes by the lower flange 3 is bent in the direction of the upper belt 2. The radius of curvature or the radius of a

Schmiegungskreises chosen as large as structurally possible to obtain favorable tension conditions. By doing

described embodiment, the lower flange 3 and thus of course an imaginary extension of the cuts

Untergurtes 3 the upper flange 2 directly, with an angle of 90 ° between the upper flange 2 and the extension of the lower flange 3 sets. At the occluding end of the upper belt 2 and the lower belt 3 is a weld

provided, which upper chord 2 and lower chord 3 connects. The boundary between the transition section 5 of the longitudinal member 1 and the end portion 4 is located at the point where the upper flange 2 and lower flange 3 intersect, the interface itself both the transition section 5 and the

End section 4 is attributed.

Such a design offers several advantages: on the one hand, upper belt 2 and lower belt 3 form in the direction of

Cross member 13 seen a continuous closed profile, which has an optimized stiffness profile

allows, and on the other hand, the force acting on the longitudinal beam 1 is divided directly into the top chord 2 and bottom chord 3.

Another aspect of the invention relates to the design of the spring cup 8, which in connection with the above

Cited particularly advantageous synergies results. The shell 11 of the spring cup has on each side of an extension 12 which surrounds the lower flange 3, so contacted the lower flange in that the curvature 9 exhibiting area. As a rule, the extension 12 is connected to the lower flange 3 near or at the longitudinal edge of the lower belt 3. As a result, a weld seam which connects the spring cup 8 to the lower chord 3 can be made substantially longer, whereby the strength of the weld seam can be reduced, and in particular one end of the weld in a less loaded section of the lower chord 3, which is closer to the central section 6, can be arranged. The extensions 12 are guided into a section behind the curvature 9, in which the lower flange 3 substantially

runs straight. The jacket 11 may be made of one piece, or be composed of a plurality of interconnected, preferably welded, plate parts. A width of the extension, so that dimension which the distance of the outer edge of the extension 12 to the

Indicates lower chord 3 contacting edge, it is at least 100 to 150 mm, with wider widths than 150 mm are generally preferable if allow other components of the chassis frame. To guide the primary suspension, it is necessary that it is completely surrounded by the shell 11. By doing

described embodiment, the lower flange 3 forms in the curvature 9 having and connected to the top flange 2 portion of a part of the lateral surface 11, more precisely, the cross member 13 facing side surface of the shell eleventh

The spring base 10 of the spring cup 8 is formed by the upper flange 2. In alternative embodiments, however, the spring base 10 is a separate component, which is connected to the upper flange 2, preferably welded. This allows the spring base 10 in a simple manner have a higher thickness than the top flange 2 itself. In order to allow an optimal connection to a curved inventive bottom flange 3, the spring base 10 may have a fork-like connection portion, wherein at least one of the forks with the Bottom 3 and at least one of the forks is connected to the top flange 2, so that the welds are not directly in the interface of upper flange 2 and

Lower chord 3 run.

From Fig. 4 is clearly the inventive design of the shell 11 of the spring cup 8 with the two-sided

Fortsätzen 12 can be seen.

FIG. 6 shows a chassis frame according to the invention in a bogie. In this case, in particular primary springs 14 are inserted into the spring pots 8, which are connected at that end, which is opposite to the spring base 10, with a wheel 15. The wheelset 15 is by means of a

Wheel set guide 16 connected to the chassis frame. The extensions 12 of the shell 11 are up to the on

Chassis frame connected part of the wheelset 16 guided and connected to this, preferably

welded. In the central portion 6 of the longitudinal member 1, a secondary spring 17 is arranged centrally. In addition to the Springs and damper elements 18 are arranged on each of the springs 14,17.

Figures 7 and 8 show an alternative

Variant of a longitudinal beam 1 according to the invention, in particular the transition section 5 and the

End section 4 in three-dimensional representation. in the

In contrast to the first embodiment, the first cross section 7 is formed in the present case as an I-profile, wherein upper flange 2 and lower flange 3 by a web 19th

are connected. Also clearly visible is the spring cup 8 itself, together with its jacket 11 and the extension 12, which surrounds the curvature 9 in sections. In particular, Figure 8 shows the spring cup 8 clearly, so it is clear where the primary spring 14 is arranged in a bogie.

Reference sign list:

1 longitudinal member

2 upper strap

3 bottom strap

4 end section

5 transition section

6 central section

7 first cross-section (box-shaped or I-profile)

8 spring pot

9 curvature

10 spring base

11 jacket of the spring pot 8

12 extension of the shell 11

13 cross members

14 primary spring

15 wheelset

16 wheelset guidance

17 secondary spring

18 damper elements

19 footbridge

Claims

Patent claims

1. Chassis frame for a bogie

Rail vehicle, with at least one longitudinal beam (1) comprising an upper chord (2) and a lower chord (3), the longitudinal beam (1) having at least one

End section (4), a central section (6) and an intermediate transition section (5), the end section (4) of the longitudinal beam (1) being a

Spring pot (8) to accommodate a primary suspension

is designed, characterized in that the

The lower chord (3) in the area of the transition section (5) has a curvature (9), which is designed in such a way that the imaginary extension of the lower chord (3) and the upper chord (2) itself or the imaginary extension of the upper chord (2) in Cut the end section (4).

2. Chassis frame according to claim 1, characterized in that the end of the lower chord (3) and the end of the

Upper flange (2) includes an angle, which angle is in a range of 60°, preferably 70°, particularly preferably 80°, to 90°.

3. Chassis frame according to claim 1 or 2, thereby

characterized in that the longitudinal beam (1) is in

Transition section (5) at least in sections has a first cross section (7), which is box-shaped

is trained.

Chassis frame according to claim 1 or 2, characterized in that the longitudinal beam (1) in

Transition section (5) has a first cross section at least in sections

(7), which is an I-profile

is trained.

Chassis frame according to one of claims 1 to 4, characterized in that the spring pot (8) has a

Spring base (10) to accommodate the primary suspension and a jacket (11) to partially enclose the

Primary suspension includes, the jacket (11) of the

Spring pot (8) has at least one extension (12), which extension (12) at least partially contacts a section of the lower flange (3) which has the curvature (9).

Chassis frame according to claim 5, characterized in that the lower flange (3) forms the jacket (11) of the spring pot (8) at least in sections.

Chassis frame according to claim 5 or 6, characterized

characterized in that the extension (12) of the spring cup (8) contacts the lower flange (3) in a non-curved section, which section faces the central section (6) of the longitudinal beam (1).

8. Chassis frame according to one of claims 5 to 7, characterized in that the upper chord (2) forms the spring base (10).

9. Chassis frame according to one of claims 5 to 8, characterized in that the spring base (10).

is a plate-like element which is connected at least to the upper flange (2).

10. Chassis frame according to claim 9, characterized in that the spring base (10) is fork-like for connection to the upper chord (2) and the lower chord (3).

Has connection section.