Chassis frame for a rail vehicle

1. A chassis frame for a rail vehicle, comprising:

a plurality of longitudinal supports which extend parallel to a longitudinal direction and are configured as I-beams, each of the plurality of longitudinal supports comprising a longitudinal support top flange, a longitudinal support bottom flange and a web; and

a box-shaped transverse support which extends normal to the longitudinal direction and parallel to a transverse direction and interconnects the plurality of longitudinal supports;

wherein each of the plurality of longitudinal supports have a central portion in which the longitudinal support top flange and the longitudinal support bottom flange are arranged parallel to one another and in which each of the plurality of longitudinal supports is connected to the transverse support;

wherein each of the plurality of longitudinal supports forms at least one wheelset guide bushing for connecting to a wheelset guide;

wherein at least one stiffening rib is arranged in each of the plurality of longitudinal supports on both sides of the web and extends on both sides of the web outwardly from the web in the transverse direction and is configured such that a force flow from the at least one wheelset guide bushing is conducted into the transverse support; and

wherein a first connection site connects the rib to the at least one wheelset guide bushing and a second connection site connects the rib to the longitudinal support top flange or to the longitudinal support bottom flange.

2. The chassis frame as claimed in claim 1 , wherein the web serves as a symmetry plane between two stiffening ribs, respectively.

3. The chassis frame as claimed in claim 2 , wherein a first connection site at which a stiffening rib is connected to the wheelset guide bushing is arranged on a side of the wheelset guide bushing facing toward the transverse support.

4. The chassis frame as claimed in claim 1 , wherein a first connection site at which a stiffening rib is connected to the wheelset guide bushing is arranged on a side of the wheelset guide bushing facing toward the transverse support.

5. The chassis frame as claimed in claim 4 , wherein the first connection site is arranged in a region of the wheelset guide bushing having a least spacing, seen in the longitudinal direction, from the transverse support.

6. The chassis frame as claimed in claim 1 , wherein each of the plurality of longitudinal supports includes at least one transition portion adjoining the central portion, in which the longitudinal support top flange and the longitudinal support bottom flange, enclose an acute angle with one another; and

wherein the wheelset guide bushing is arranged in the at least one transition portion in a region of the longitudinal support bottom flange.

7. The chassis frame as claimed in claim 6 , wherein the second connection site is arranged at a transition between the central portion and a transition portion of the longitudinal support top flange.

8. The chassis frame as claimed in claim 7 , wherein the second connection site is arranged within a transition radius.

9. The chassis frame as claimed in claim 1 , wherein a second connection site at which the rib is connected to the longitudinal support and by which the force flow is conducted into the transverse support is arranged on the longitudinal support top flange.

10. The chassis frame as claimed in claim 9 , wherein the second connection site is arranged in a central portion of the longitudinal support top flange.

11. The chassis frame as claimed in claim 9 , wherein the second connection site is arranged at a transition between the central portion and a transition portion of the longitudinal support top flange.

12. The chassis frame as claimed in claim 1 , wherein a projection of the at least one stiffening rib in the transverse direction is a straight line.

13. The chassis frame as claimed in claim 1 , wherein a projection of the least one stiffening rib in the transverse direction has a kink which subdivides the rib into a first rib portion and a second rib portion.

14. The chassis frame as claimed in claim 13 , wherein the kink divides the rib in a ratio of between 1:1 and 1:2.

15. The chassis frame as claimed in claim 14 , wherein the first and second rib portions enclose an obtuse angle.

16. The chassis frame as claimed in claim 15 , wherein the obtuse angle is between 175° and 150°.

17. The chassis frame as claimed in claim 13 , wherein the first and second rib portions enclose an obtuse angle.

18. The chassis frame as claimed in claim 17 , wherein the obtuse angle is between 175° and 120°.

19. The chassis frame as claimed in claim 1 , wherein the at least one stiffening rib has a first longitudinal edge facing toward the web and a second longitudinal edge facing away from the web; and

wherein the at least one stiffening rib is connected at the first longitudinal edge at least partially to the web.

20. The chassis frame as claimed in claim 19 , wherein a projection of the second longitudinal edge in a direction normal to a plane spanned by the longitudinal direction is a straight line.

21. The chassis frame as claimed in claim 19 , wherein a projection of the second longitudinal edge in a direction normal to a plane spanned by the longitudinal direction is at least partially curved and has the form of an ellipse.

22. The chassis frame as claimed in claim 21 , wherein the at least one stiffening rib includes a constriction in a region of the second longitudinal edge.

23. The chassis frame as claimed in claim 19 , wherein the projection of the second longitudinal edge in a direction normal to a plane spanned by the longitudinal direction is forms an ellipse.

24. The chassis frame as claimed in claim 19 , wherein the at least one stiffening rib includes a constriction in a region of the second longitudinal edge.