Running gear unit for a rail vehicle

Patent metadata

Field	Value
Publication number	US-9718484-B2
Application number	US-201314402904-A
Country	US
Kind code	B2
Filing date	May 29, 2013
Priority date	Aug 12, 2011
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

A running gear unit for a rail vehicle, having a running gear frame body. The frame body includes two longitudinal beams and a transverse beam unit providing a structural connection between the longitudinal beams, such that a substantially H-shaped configuration is formed. Each longitudinal beam has a suspension interface section associated to a free end section of the longitudinal beam and forming a primary suspension interface for a primary suspension device. Each longitudinal beam has a pivot interface section associated to the primary suspension interface section and forming a pivot interface for a pivot arm. The primary suspension interface is configured to take a total resultant support force acting in the area of the free end section when the frame body is supported on the associated wheel unit.

First claim

The invention claimed is:

1. A running gear unit comprising:
a running gear frame body defining a longitudinal direction, a transverse direction and a height direction;
said frame body comprising two longitudinal beams and a transverse beam unit providing a structural connection between said longitudinal beams in said transverse direction, such that a substantially H-shaped configuration is formed,
each longitudinal beam having a suspension interface section associated to a free end section of said longitudinal beam and forming a primary suspension interface for a primary suspension device connected to an associated wheel unit;
each longitudinal beam having a pivot interface section associated to said primary suspension interface section and forming a pivot interface for a pivot arm connected to said associated wheel unit;
said primary suspension interface being configured to take a total resultant support force acting in the area of said free end section when said frame body is supported on said associated wheel unit;
wherein
said primary suspension interface is configured such that said total resultant support force is inclined with respect to said longitudinal direction and inclined with respect to said height direction,
said primary suspension interface defines a main interface plane;
said main interface plane being configured to take at least a major fraction of said resultant support force;
said main interface plane being inclined with respect to said longitudinal direction and inclined with respect to said height direction;
said main interface plane being inclined with respect to said height direction by a main interface plane angle, said main interface plane angle ranging from 40° to 50°; and
said main interface plane being substantially parallel with respect to said transverse direction.

2. The running gear unit according to claim 1 , wherein,
said total resultant support force is inclined with respect to said height direction by a primary suspension angle;
said primary suspension angle ranging from 20° to 80°.

3. The running gear unit according to claim 1 , wherein,
said associated wheel unit is connected to said frame body via said pivot arm pivotably linked to said pivot interface;
said primary suspension interface and said primary suspension device being configured such that said total resultant support force intersects a wheel shaft of said wheel unit.

4. The running gear unit according to claim 1 , wherein,
said pivot interface section, in said longitudinal direction, is arranged to be at least partially retracted behind a center of said primary suspension interface;
a center of a forward primary suspension interface and a center of a rearward primary suspension interface of one of said longitudinal beams, in said longitudinal direction, defining a maximum primary suspension interface center distance;
a forward pivot interface section being associated to said forward primary suspension interface and defining a forward pivot axis for a forward pivot arm;
a rearward pivot interface section being associated to said rearward primary suspension interface and defining a rearward pivot axis for a rearward pivot arm;
said forward pivot axis and said rearward pivot axis, in said longitudinal direction, defining a pivot axis distance;
said pivot axis distance being 60% to 105% of said maximum primary suspension interface center distance.

5. The running gear unit according to claim 1 , wherein,
said primary suspension interface is configured as an interface for a single primary suspension device;
said primary suspension device being formed by a single primary suspension unit;
said primary suspension unit being formed by a single primary suspension spring.

6. The running gear unit according to claim 1 , wherein,
said frame body is formed as a monolithically cast component made of a grey cast iron material;
said frame body being made of a spheroidal graphite iron cast material;
said spheroidal graphite iron cast material being one of EN-GJS-400-18U LT and EN-GJS-350-22-LT.

7. The running gear unit according to claim 1 , wherein,
each longitudinal beam has an angled section associated to said free end section;
said angled section being configured such that said free end section ( 108 . 1 ) forms a pillar section at least mainly extending in said height direction:
said pivot interface section being associated to said angled section;
said pivot interface section being integrated into to said angled section.

8. The running gear unit according to claim 1 , wherein
said pivot interface section, in said longitudinal direction, is arranged to be at least partially retracted behind said associated free end section;
a forward free end section and a rearward free end section of one of said longitudinal beams, in said longitudinal direction, defining a maximum longitudinal beam length of said longitudinal beam;
a forward pivot interface section associated to said forward free end section defining a forward pivot axis for a forward pivot arm;
a rearward pivot interface section associated to said rearward free end section defining a rearward pivot axis for a rearward pivot arm;
said forward pivot axis and said rearward pivot axis, in said longitudinal direction, defining a pivot axis distance;
said pivot axis distance being 60% to 90% of said maximum longitudinal beam length.

9. The running gear unit according to claim 1 , wherein,
in said height direction, one of said longitudinal beams, in a longitudinally central section, defines a longitudinal beam underside and a maximum central beam height of said longitudinal beam above said longitudinal beam underside, and
one of said free end sections of said longitudinal beam defines a maximum beam height above said longitudinal beam underside;
said maximum beam height being 200% to 450% of said maximum central beam height.

10. The running gear unit according to claim 1 , wherein,
said transverse beam unit comprises at least one transverse beam;
said at least one transverse beam, in a sectional plane parallel to said longitudinal direction and said height direction, defining a substantially C-shaped cross section;
said substantially C-shaped cross section being arranged such that, in said longitudinal direction, it is open towards a free end of said frame body and substantially closed towards a center of said frame body;
said substantially C-shaped cross section extending, in said transverse direction, over a transversally central section of said transverse beam unit;
said substantially C-shaped cross section extending, in said transverse direction, over a transverse dimension, said transverse dimension being at least 50% of a transverse distance between longitudinal center lines of said longitudinal beams in the area of said transverse beam unit.

11. The running gear unit according to claim 10 , wherein,
said at least one transverse beam is a first transverse beam and said transverse beam unit comprises a second transverse beam;
said first transverse beam and said second transverse beam being substantially symmetric with respect to a plane of symmetry parallel to said transverse direction and said height direction;
said first transverse beam and said second transverse beam being separated, in said longitudinal direction, by a gap having a longitudinal gap dimension;
said longitudinal gap dimension being 70% to 120% of a minimum longitudinal dimension of one of said transverse beams in said longitudinal direction;
said first transverse beam and said second transverse beam each defining a transverse beam center line, at least one of said transverse beam center lines, at least section wise,

Assignees

• Bombardier Transp Gmbh

Inventors

• Zanutti Cedric

Classifications

• B61F5/325 Primary

  The guiding device including swinging arms or the like to ensure the parallelism of the axles · CPC title

• B61F5/30 Primary

  Axle-boxes mounted for movement under spring control in vehicle or bogie underframes {(B61F5/36 takes precedence over B61F5/305 - B61F5/34)} · CPC title

• B61F5/52

  Bogie frames · CPC title