IP Library › Granted Patent US 12691914
Granted Patent B2
US 12691914 · App. 17/921,715 · Granted Jul 28, 2026

Underframe for a rail vehicle car body

Inventors: Clemens Eger-Hübel (Vienna, AT); Michael Diem (Graz, AT)
Assignee: Siemens Mobility Austria GmbH
B61F1/12B62D21/02B61D17/12
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Quick Facts
Patent No.
US 12691914
App. No.
17/921,715
Granted
Jul 28, 2026
Kind
B2
Abstract

An underframe for a rail vehicle car body includes a plurality of longitudinal support members oriented in the longitudinal direction of the underframe, and at least one transverse support member which, in the fitted position is oriented perpendicular to the longitudinal support members, wherein the longitudinal support members each have an opening at the level of the mounting position of the transverse member through which the transverse member can be inserted.

Claims (13)

1 . An underframe for a rail vehicle car body, comprising:

a plurality of longitudinal support members oriented in a longitudinal direction of the underframe; and

at least one transverse support member, which in the fitted position is oriented perpendicularly to the longitudinal support members;

wherein each longitudinal support member of the plurality of longitudinal support members includes, at an assembly position of the at least one transverse support member, an opening through which the at least one transverse support member is insertable;

wherein the at least one transverse support member is rotatable about its longitudinal axis in respective openings of the longitudinal support member; and

wherein the at least one transverse support member is at a final assembly position after completion of a rotary movement about its longitudinal axis.

2 . The underframe for a rail vehicle car body as claimed in claim 1 , wherein the at least one transverse support member comprises grooves which are positively connected to the plurality of longitudinal support members in the final assembly position.

3 . The underframe for a rail vehicle car body as claimed in claim 2 , wherein the transverse support member is formed as a metal profile with a z-shaped cross section.

4 . The underframe for a rail vehicle car body as claimed in claim 2 , wherein each longitudinal support member of the plurality of longitudinal support members is connected to the at least one transverse support member via a welding process at points of intersection with said at least one transverse support member.

5 . The underframe for a rail vehicle car body as claimed in claim 1 , wherein the transverse support member is formed as a metal profile with a z-shaped cross section.

6 . The underframe for a rail vehicle car body as claimed in claim 5 , wherein each longitudinal support member of the plurality of longitudinal support members is connected to the at least one transverse support member via a welding process at points of intersection with said at least one transverse support member.

7 . The underframe for a rail vehicle car body as claimed in claim 1 , wherein each longitudinal support member of the plurality of longitudinal support members is connected to the at least one transverse support member via a welding process at points of intersection with said at least one transverse support member.

8 . The underframe for a rail vehicle car body as claimed in claim 1 , wherein a plurality of transverse support members is provided which each extend over a width of the underframe; and wherein each end of the transverse support member of the plurality of transverse support members is connected to a lateral longitudinal support member on each side.