Bogie frame with asymmetrical support beam and bogie of a rail vehicle

Patent metadata

Field	Value
Publication number	US-11767040-B2
Application number	US-202017137540-A
Country	US
Kind code	B2
Filing date	Dec 30, 2020
Priority date	Dec 31, 2019
Publication date	Sep 26, 2023
Grant date	Sep 26, 2023

Abstract

A unitary bogie frame for a bogie of a rail vehicle, includes: two side beams and at least one support beam extending in the transverse direction of the bogie frame and rigidly connected to each of the two side beams. The support beam includes a support portion for supporting a drive unit of the bogie and a slender portion. The support portion is directly connected to one of the two side beams and is connected to the other of the two side beams through the slender portion. The planar second moment of area and the polar second moment of area of any cross section of the support portion of the support beam are at least twice as great as the planar second moment of area and the polar second moment of area, respectively, of any cross-section of the slender portion of the support beam.

First claim

The invention claimed is:

1. A unitary bogie frame for a bogie of a rail vehicle, the unitary bogie frame comprising:
at least two side beams extending in a longitudinal direction of the bogie frame, and spaced apart from one another in a transverse direction of the bogie frame, on respective left and right sides of a longitudinal median plane of the bogie frame,
at least one support beam extending in the transverse direction of the bogie frame, wherein the support beam is rigidly connected to each of the two side beams, and includes a support portion for supporting a drive unit of the bogie and a slender portion, wherein each cross-section of the support beam by a cross-sectional plane parallel to the longitudinal median plane has a planar second moment of area and a polar second moment of area,
wherein the support portion is directly connected to one of the two side beams and is connected to the other of the two side beams through the slender portion, wherein the planar second moment of area and the polar second moment of area of any cross section of the support portion of the support beam are at least twice as great as the planar second moment of area and the polar second moment of area, respectively, of any cross-section of the slender portion of the support beam, and
a further support beam extending in the transverse direction of the unitary bogie frame,
wherein the support beam and the further support beam are spaced apart from one another in the longitudinal direction of the unitary bogie frame on respective front and rear sides of a transversal median plane of the unitary bogie frame, wherein the further support beam includes a further support portion for supporting the drive unit or a further drive unit and a further slender portion, the further support portion being connected to said one of the two side beams through the further slender portion and directly connected to said other of the two side beams, wherein each cross-section of the further support beam by a cross-sectional plane parallel to the longitudinal median plane has a planar second moment of area and a polar second moment of area, and the planar second moment of area and the polar second moment of area of any cross section of the further support portion of the further support beam are greater, at least twice as great as the planar second moment of area and the polar second moment of area, respectively, of any cross-section of the further slender portion of the further support beam.

2. The unitary bogie frame of claim 1 , wherein the slender portion extends in the transverse direction over a length that is at least one third of an overall length of the support beam measured in the transverse direction from one of the side beams to the other.

3. The unitary bogie frame of claim 1 , wherein the support portion extends in the transverse direction over a length that is less than two fifths of an overall length of the support beam measured in the transverse direction from one of the side beams to the other.

4. The unitary bogie frame of claim 1 , wherein the support beam further comprises a transition portion extending from the support portion to the slender portion, wherein the planar second moment of area and the polar second moment of area of any cross section of the transition section decreases when the distance of the cross-section to the support portion increases.

5. The unitary bogie frame of claim 1 , wherein the polar second moment of area of any cross section of the support portion of the support beam is at least three times as great as the polar second moment of area of any cross-section of the slender portion of the support beam.

6. The unitary bogie frame of claim 1 , wherein one or more of the following conditions are met:
the support portion and the further support portion are located on opposite sides of the longitudinal median plane of the unitary bogie frame,
the support beam and further support beam are symmetrical or substantially symmetrical relative to a vertical intersection axis between the longitudinal median plane and the transversal median plane of the unitary bogie frame,
the support beam is closer to an end of the unitary bogie frame than to the median transverse plane,
the further support beam is closer to a further end of the unitary bogie frame than to the median transverse plane,
the unitary bogie frame comprises at least two secondary suspensions interfaces, each for accommodating a vertical spring of a secondary suspension, located at symmetric locations each on a respective side of the median longitudinal plane, each closer to the median transverse plane than the support beam and further support beam,
the unitary bogie frame comprises at least two primary suspension interfaces, each of the primary suspension interfaces for accommodating a spring of a primary suspension, located at symmetric locations each on a respective side of the median longitudinal plane, each closer to the support beam than to the median transverse plane; and
the unitary bogie frame comprises at least two further primary suspension interfaces, each of the further primary suspension interfaces for accommodating a spring of a further primary suspension, located at symmetric locations each on a respective side of the median longitudinal plane, each closer to the further support beam than to the median transverse plane.

7. The unitary bogie frame of claim 1 , wherein a median crossbeam is located between the support beam and the further support beam, closer to the median transverse plane than the support beam and the further support beam, and each cross-section of the median crossbeam by a cross-sectional plane parallel to the longitudinal median plane has a planar second moment of area and a polar second moment of area, which are at least twice as great as the planar second moment of area and the polar second moment of area, respectively, of any cross-section of the slender portion of the support beam.

8. The unitary bogie frame of claim 7 , comprising a further median crossbeam extending from said one of the two side beams to the other, wherein the further median crossbeam is located between the support beam and the further support beam, the median crossbeam and further median crossbeam are located on both sides of the median transverse plane of the unitary bogie frame, closer to the median transverse plane than the support beam and the further support beam, and each cross-section of the further median crossbeam by a cross-sectional plane parallel to the longitudinal median plane has a planar second moment of area and a polar second moment of area, which are at least twice as great as the planar second moment of area and the polar second moment of area, respectively, of any cross-section of the slender portion of the support beam.

9. The unitary bogie frame of claim 1 , provided with one or more of the following features:
the unitary bogie frame is made in one piece.

10. A bogie for a rail vehicle comprising at least one set of wheels, a unitary bogie frame supported on said at least one set of wheels and a drive unit attached to the unitary bogie frame for driving said at least one set of wheels, wherein the unitary bogie frame is a unitary bogie frame according to claim 1 , and wherein the drive unit is attached to the support portion of the support beam of the unitary bogie frame.

11. The bogie of claim 10 , further comprising wheel bearings for guiding a rotation movement of each wheel of the set of wheels about a spin axis, wherein the wheel bearings are located between the wheels of the set of wheels.

12. The bogie of claim 10 ,
wherein the unitary bogie frame comprises a further support beam extendin

Assignees

• Bombardier Transp Gmbh

Inventors

• King Paul
• Adams Philip

Classifications

• B61F3/04 Primary

  with driven axles or wheels · CPC title

• B61F5/52 Primary

  Bogie frames · CPC title

• B61F5/40 Primary

  Bogies with side frames mounted for longitudinal relative movements · CPC title

• B61F5/04

  Bolster supports or mountings (side bearings B61F5/14) · CPC title

• B61F5/38

  Arrangements or devices for adjusting or allowing self- adjustment of wheel axles or bogies when rounding curves, e.g. sliding axles, swinging axles · CPC title