Bogie frame for rail vehicles made from an aluminum casting

Abstract

The invention relates to a bogie frame (1) for rail vehicles having at least two wheelsets, the bogie frame comprising two longitudinal members (3), which extend parallel to each other above the axle bearings, one or more cross-members (2) connected to the longitudinal members (3), and a receiving region (5) for functional elements, the bogie frame (1) being produced completely as a single casting of an aluminum alloy in a sand casting process, said casting having a hollow profile, which has cavities (10) in the interior and is stabilized by means of ribbings (8, 9). The invention further relates to a method for producing a bogie frame of this type and to a rail vehicle equipped with a bogie frame of this type.

Claims

1. A bogie frame for rail vehicles with at least two wheelsets, the bogie frame comprising two longitudinal members, which extend parallel to each other above axle bearings, one or more cross-members connected to the longitudinal members, and receiving regions for functional elements, characterized in that the bogie frame is being produced completely as a single casting of an aluminum alloy with a hollow profile, which has cavities in the interior and is stabilized by means of ribbings, wherein the casting is provided with an elastic surface protection.

2. The bogie frame according to claim 1, wherein the casting is made of aluminum in a sand casting process.

3. The bogie frame according to claim 1, wherein the cavities of the two longitudinal members and/or the crossmembers are formed as air reserve reservoirs.

4. The bogie frame according to claim 1, wherein on the underside of the bogie frame protected areas are provided, onto which ribs are cast to prevent stone chipping.

5. The bogie frame according to claim 4, wherein a rubber lining is provided between the ribs.

6. The bogie frame according to claim 1, wherein the aluminum alloy consists of aluminum, silicon and magnesium and optionally contains additions of manganese, copper and/or zinc.

7. The bogie frame according to claim 1, wherein the casting is homogeneously structured and that operating stresses and loads are absorbed in the component.

8. The bogie frame according to claim 1, wherein a force absorption at the primary suspension is supported by steel bushings.

9. The bogie frame according to claim 1, wherein, for a transmission of force, the corrosion-free steel bushings are embedded in the longitudinal members.

10. The bogie frame according to claim 1, wherein the ribbing comprises load-induced ribs and transverse ribs.

11. The bogie frame according to claim 1, wherein the receiving region can be used for functional elements and interfaces, wherein side stops, roll-bearing fastenings and other fastening elements are cast on in a function-related manner.

12. The bogie frame according to claim 1, wherein the two longitudinal members are connected to the cross-members.

13. A rail vehicle comprising a bogie frame according to claim 1.

Description

WAYS OF CARRYING OUT THE INVENTION AND INDUSTRIAL APPLICABILITY

(1) FIG. 1 shows an embodiment of a bogie frame 1 according to the invention as a one-piece component made of cast aluminum. The bogie frame 1 according to the invention can be seen with two longitudinal members 3 arranged parallel to each other. The two longitudinal members 3 are connected to each other by two interconnected cross-members 2. At the same time, the two cross-members 2 are connected to each other by two central longitudinal bridges 4, which comprise a receiving region 5 for functional elements. On each of the two cross-members 2, two opposite lugs 7 are formed as side stops.

(2) The complete component is provided with attachments for functional elements and interfaces, which may protrude from the surface. Due to the stress-flux-compliant form, loads and forces are directed into the interior of the aluminum component in a controlled manner.

(3) FIGS. 2 to 4 show the hollow profile of the embodiment as shown in FIG. 1. The inside of the casting is hollow and consists of one or more cavities 10, which are separated from each other by ribbings 9. Said ribbings are located at those points which are subject to particularly high stress, and they consist of longitudinal ribs and transverse ribs of various forms. The ribbings 9 stabilize the casting, they distribute the stresses and they take over the supporting function.

(4) In FIG. 2 a side view is shown. It can be seen that the two longitudinal members 3 are connected by two cross-members 2, said cross-members each having two opposite lugs 7 cast on as side stops. The ribbings 9 inside the casting, together with the outer walls 8, take over the structural function of the component.

(5) FIG. 3 shows a top view of a centrally cut component. A receiving region 5 for functional elements as well as the longitudinal bridge 4 can be seen. The steel bushings 6 are embedded in the component (longitudinal beam 3) for the transmission of loads from the primary suspensions. Said primary suspensions are hat-shaped and make use of all contact areas in the component in order to sustainably and evenly transmit the loads into the component.

(6) FIG. 4 shows the individual ribbing 9 of the cavity.

(7) The construction made of an aluminum casting according to the invention, is characterized by substantial cost savings and, simultaneously, by a reduction of weight. Also, driving noises are considerably reduced. Time-consuming welding work on steel components, such as traverses made of ferrous material or air reservoirs made of sheet steel, are not needed anymore. These aspects present considerable advantages compared to previously known bogie frames.