EP2748048A1 - Railway bogie assembly with adapter for suspension - Google Patents
Railway bogie assembly with adapter for suspensionInfo
- Publication number
- EP2748048A1 EP2748048A1 EP11808317.9A EP11808317A EP2748048A1 EP 2748048 A1 EP2748048 A1 EP 2748048A1 EP 11808317 A EP11808317 A EP 11808317A EP 2748048 A1 EP2748048 A1 EP 2748048A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bracket
- railway
- adapter
- railway bogie
- previous
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/26—Mounting or securing axle-boxes in vehicle or bogie underframes
- B61F5/30—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61F—RAIL VEHICLE SUSPENSIONS, e.g. UNDERFRAMES, BOGIES OR ARRANGEMENTS OF WHEEL AXLES; RAIL VEHICLES FOR USE ON TRACKS OF DIFFERENT WIDTH; PREVENTING DERAILING OF RAIL VEHICLES; WHEEL GUARDS, OBSTRUCTION REMOVERS OR THE LIKE FOR RAIL VEHICLES
- B61F5/00—Constructional details of bogies; Connections between bogies and vehicle underframes; Arrangements or devices for adjusting or allowing self-adjustment of wheel axles or bogies when rounding curves
- B61F5/26—Mounting or securing axle-boxes in vehicle or bogie underframes
- B61F5/30—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes
- B61F5/305—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes incorporating rubber springs
Abstract
Railway bogie (1) comprising a bogie frame (7), a wheelset including wheels (4) mounted on a rotatable axle having a rotation axis (X-X' ), at least one axlebox (2) wherein at least one rolling bearing is assembling for supporting the rotatable axle, and at least one suspension (6) mounted on a link arm (5) of the said at least one axlebox (2), and an adapter (100; 200; 300) fast with the bogie frame (7) on top and supported by the said at least one suspension (6) on the bottom. The said adapter (100; 200; 300) comprises at least one bracket (101; 201; 301) wherein an assembling plate (103) is fast with the bottom surface of the said at least one bracket (101; 201; 301) and is mounted upon an assembling surface (9) defined oh the top of the said at least one suspension (6); and an inner empty volume (117) is defined inside the said at least one bracket (101; 201; 301) by bracket walls and defining a lower surface (S2) and an upper surface (S1), the lower surface (S2) being substantially greater than the upper surface (S1).
Description
Description
Railway bogie assembly with adapter for suspension The invention relates to a railway bogie assembly comprising at least two suspensions on an axlebox and having an adapter being required for mounting the said suspension to a bogie frame.
Railway bogie assembly generally comprises:
a wheelset comprising a rotatable axle, wheels mounted on the axle and at least one axlebox wherein at least one rolling bearing is mounted for supporting the rotatable axle;
at least one suspension mounted on an axlebox link arm, the said suspensions being of any type such as helical springs from UIC standards or hydraulic suspensions such as disclosed in US2002-0089102;
a bogie frame; and
an adapter able to make the wheelset supporting the said bogie frame.
Adapters are basically welded to the lower surface of the bogie frame and fixed via assembling means to the axlebox. In case of freight rail vehicles, the adapter can be directly fast with the axlebox suspensions.
However, the standard adapters currently in the market are not designed for improving the railway bogie performances and manufacturing process.
Indeed, they are usually full metal cast parts or welded metal part but without any weight optimization. Weight reduction is a constant worry of optimization in trains and freight rail vehicles for consuming less energy for a given overall load or for having an increased load for a given energy consumption.
Moreover, the manufacturing process of the complete railway bogie is not optimised for easier and more efficient steps in particular the mounting process of the bogie frame on the wheelset One object of the present invention is to overcome these drawbacks by providing a railway bogie assembly comprising at least one axlebox with at least one suspension, so that the railway bogie has an improved adapter for facilitating the mounting process and having reduced weight.
According to the invention, such an adapter is characterized in that it comprises at least one bracket fast with the bogie frame and mounted upon the at least one suspension, the said at least one bracket comprising an inner empty volume with a lower surface S2 substantially greater than an upper surface Si.
An assembling plate is fast with the bottom surface of the said at least one bracket. This assembling plate is dedicated to be mounted on an assembling surface defined on the top of the suspension.
The inner empty volume of the bracket is defined by the bracket walls, the assembling plate on the underside and the bogie frame on the top. The lower surface S2 is covered by the assembling plate and the upper surface Si is covered by the bogie frame.
According to further aspects of the invention, which are advantageous but not compulsory, such an adapter may incorporate one or several of the following features as long there is no contradiction:
- The at least one bracket is positioned under a horizontal section of the bogie frame.
- The assembling plate of each bracket is provided with an assembling opening in which assembling means can fit. It permits
the assembly of the adapter fast with the bogie frame to the at least one axlebox. The assembling means can be on any type such as bolts, rivets, mounting lugs or others without being a limitation for the present invention.
- The assembling plate of each bracket is welded to the suspension.
- The adapter fast with the bogie frame cooperates with an adapter fast with the suspension in order to have the wheelset able to support the bogie frame.
- The adapter comprises a lateral wall which is substantially perpendicular to the bogie frame section on which the adapter is fast .
- The at least one bracket comprises a lateral wall having a U-shape on cross-section defined with a horizontal plane.
- The at least one bracket comprises at least one side wall fast with the lateral wall. The said side wall forms an obtuse angle β with the upper surface Sx and an acute angle a with the lower surface S2.
- The at least one bracket comprises at least one side wall being a plane surface.
- The at least one bracket comprises at least one side wall having a curved section. Such a curved section permits a better force distribution on the entirety of the side wall compared to a plane surface in which the forces are concentrated in specific locations. The risks of damage and fatigue rupture are then strongly reduced.
- The at least one side wall has a curved section defining an obtuse angle β with upper surface Si and an acute angle a with the lower surface S2. The said angles a and β are substantially equal to 90° at the junction between the side wall and the lateral wall. Therefore the angle β constantly increases while the angle a constantly decreases up to the extreme left end of the side wall curvature .
- The at least one bracket comprises a lateral wall with a U- shape and a recess.
- The at least one axlebox comprises at least two suspensions. The adapter comprises a first bracket and a second bracket at each end. The said first and second brackets are linked together by an elongated part. Any additional bracket is optionally placed between the said first and second brackets and fast with the elongated part. These additional brackets can be of any type (cylindrical or other) without being a limitation for the invention. Such an elongated part permits a facilitated assembling and a better adjustment of the adapter positioning on the bogie frame compared to the use of separated and distinct brackets. Moreover, the elongated part enables a better distribution of forces and avoids having too important stress on the brackets alone .
- The first bracket is positioned under a horizontal section of the bogie frame.
- The second bracket is positioned under an inclined section of the frame bogie. It comprises a surrounding wall which defines an empty volume and an assembling plate. Advantageously, this bracket is provided with an upper opening on its upper surface wherein the assembling means can fit. Such an opening permits an optimization of the necessary available space since it requires a reduced height of the second bracket, and then a reduced amount of material. Moreover, the adapter rigidity is improved.
- The at least one bracket comprises lateral and side walls having a thickness comprised between 10 and 20 mm.
- Brackets are rigidly maintained to the elongated part and/or the bogie frame by rigidity means.
- All the parts of the adapter are welded together.
- The complete adapter is molded.
- The adapter is directly welded to the bogie frame or is welded to the bogie frame via the elongated part.
The advantage of such a bracket design compared to a standard cylindrical bracket is that less material is required and enables a weight reduction, but without decreasing the bracket rigidity.
Moreover, the U-shape of the bracket lateral wall allows a passage for eventually the insertion of assembling means and/or tools by an operator during manufacturing. In this case, the side wall is fast with the lateral wall after the assembly phase.
In case of use of an elongated part, this one has a reduced length with such a bracket design compared to standard cylindrical brackets .
According to another aspect of the invention, a railway coach is mounted upon the railway bogie and directly supported by the bogie frame for permitting the railway coach displacement on rail tracks. Moreover, one can mount two railway bogies at each end of the railway coach for supporting it.
Further advantages, features and details of the invention will be described with reference to the appended and non-limiting drawings wherein:
- Figure 1 is a side view of the railway bogie;
Figure 2 is a perspective view of the left part of the railway bogie assembly according to the first embodiment;
Figure 3 is a longitudinal cross section of the adapter according to the first embodiment mounted on the axlebox;
Figures 4a to 4e are face, top, bottom, right and left side views respectively of the adapter according to one embodiment;
Figure 5 is a perspective view of the adapter according to another embodiment; and
Figure 6 is a perspective view of the left part of the railway bogie assembly according to another embodiment.
Figure 1 and 2 show views of the railway bogie assembly 1 of the so-called Y 25 type. The railway bogie 1 comprises two axleboxes 2 whereby their housings 3 enclose at least one rolling bearing (not shown) for supporting each one end of rotatable axles (not shown) having a rotation axis X-X' . Each pair of wheels 4 is fixed to one rotatable axle. Since the left and the right axlebox assemblies are identical, the following drawing description will only describe the left railway bogie side. Each axlebox 2 is extended to the left and the right side by two link arms 5 on which suspensions 6 are mounted on each of said link arms 5. The link arms 5 and their associated suspensions 6 are symmetrical about a substantially vertical axis Χ -Χι' through the middle of the axlebox 2. The vertical axis Χχ-Χι ' is perpendicular to the substantially horizontal axis X-X' .
The railway bogie assembly 1 also comprises a bogie frame 7 which is mounted on the axleboxes 2 via the suspensions 6 and an adapter 100.
The adapter 100 comprises a first bracket 101 and a second bracket 102 at each end, linked together by an elongated part 105. An assembling plate 103, 104 is fast with the bottom surface of the first bracket 101 and the second bracket 102 respectively.
The first bracket 101 is dedicated to be positioned under the horizontal section 115 of the bogie frame 7.
The first bracket 101 comprises a lateral wall 106 which is parallel with the vertical axis Χχ-Χι ' . The cross-section along a horizontal plane 2 ~^2 ' of the lateral wall 106 has a U-shape.
According to the Figures 2, 3 and 4a to 4e, a side wall 107 which is a plane surface is fast with the lateral wall 106. An inner empty volume 116 defined by the walls 106, 107 defines a
lower surface S2 and an upper surface Sx. The lower surface S2 is covered by the assembling plate 103 on the underside and the upper surface Si is covered on the top by the elongated part 105 The inner empty volume 116 is such that the lower surface S2 is strictly greater than the upper surface Si. The side wall 107 is then inclined forming an obtuse angle β with the elongated part 105, and an acute angle with the mounting plate 103. The second end bracket 102 of the frame adapter 100 is placed under the inclined section 109 of the bogie frame 7. An inner empty volume 117 is defined by a surrounding wall 110, the elongated part 105 on the top, and the assembling plate 104 on the underside. The said surrounding wall 110 is parallel to the vertical axis Χι-Χχ' .
Each assembling plate 103, 104 is mounted upon an assembling surface 9, 10 respectively defined on the top of each suspension 6 The assembling plates 103, 104 are provided with an assembling opening 108, 111 respectively in which assembling means 8 are inserted for attaching the adapter 100 to each suspension 6 of the axlebox 2.
The elongated part 105 is provided with an inclined end 118 which is located under the inclined section 109 of bogie frame. This inclined end 118 is provided with an upper opening 112 above the second bracket 102. Therefore tools can be inserted during manufacturing and/or upper part of assembling means 8 can fit in the elongated part thickness.
Both brackets 101 and 102 are rigidly maintained to the elongated part 105 by rigidity means 113, 114.
In the embodiment illustrated in Figure 5, on which similar parts bear the same references, an adapter 200 comprises a first
bracket 201 and a second bracket 102 at each end, linked together by an elongated part 105.
In this second embodiment, the first bracket 201 comprises a lateral wall 106 and a side wall 207 having a curved section. The side wall 207 defines an obtuse angle β with the upper surface Si and an acute angle a with the lower surface S2. The said angles . and β are substantially equal to 90° at the junction between the side wall 207 and the lateral wall 106. Since the lower surface S2 is strictly greater than the upper surface Sir the curved side wall 107 is inclined and the angle β constantly increases while the angle a constantly decreases up to the extreme left end of the side wall 207 curvature. In the embodiment illustrated in Figure 6, on which similar parts bear the same references, an adapter 300 comprises a first bracket 301 and a second bracket 302 at each end, linked together by an elongated part 305. In this embodiment, the first bracket 301 comprises a lateral wall 106 having a U-shape and the extreme end surface of the bracket 301 is a recess 307. The inner empty volume 116 defined by the lateral wall 106 and the recess 307 is covered on the top by the end of the elongated part 305 and on the underside by the assembling plate 103. This inner empty volume 116 is such as the lower surface covered by the assembling plate 103 is strictly greater than the upper surface covered by the end of the elongated plate 305. The recess 307 has an inclined plane shape and forms an obtuse angle with the elongated part 305, and an acute angle with the assembling plate 103.
The second end bracket 302 is such that the elongated part 305 is directly attached to the surrounding wall 110 and does not cover the second bracket empty volume 117. The upper inclined surface 309 is then provided with a wide upper opening 312 in
which tools can be inserted during manufacturing and/or upper part of assembling means 8 engaged in opening 111 can fit.
According to another aspect of the invention, a railway coach (not shown) is mounted upon the railway bogie 1 and directly supported by the bogie frame 7 for permitting the railway coach displacement on rail tracks. Moreover, one can mounts two railway bogies 1 at each end of the railway coach for supporting it.
Claims
1. Railway bogie (1) comprising a bogie frame (7), a wheelset including wheels (4) mounted on a rotatable axle having a rotation
5 axis (Χ-Χ' ) , at least one axlebox (2) wherein at least one rolling bearing is installed for supporting the rotatable axle, at least one suspension (6) mounted on a link arm (5) of the said at least one axlebox (2), and an adapter (100; 200; 300) fast with the bogie frame (7) on top and supported by the said at least one 10. suspension (6) on the bottom
characterized in that
the said adapter (100; 200; 300) comprises at least one bracket (101; 201; 301) wherein:
- an assembling plate (103) is fast with the bottom surface 15 of the said at least one bracket (101; 201; 301) and is mounted upon an assembling surface (9) defined on the top of the said at least one suspension (6) ;
- an inner empty volume (116) is defined inside the said at least one bracket (101; 201; 301) by bracket walls and defining a
20 lower surface (S2) and an upper surface ( S 1 ) , the lower surface (S2) being substantially greater than the upper surface (Si) .
2. Railway bogie according to claim 1
characterized in that
5 the at least one bracket (101; 201; 301) comprises a lateral wall (106) parallel to a substantially vertical axis (Χι-Χχ' ) and such that in cross-section along a substantially horizontal plane (X2-X2' ) the said lateral wall (106) has a U-shape. 0
3. Railway bogie according to any of the previous claims
characterized in that
the at least one bracket (101; 201; 301) comprises at least one side wall (107; 207) fast with the lateral wall (106) and forming an obtuse angle β with the upper surface (Si) and an acute 5 angle . with the lower surface (S2) .
4. Railway bogie according to claim 3
characterized in that
the at least one bracket (101) comprises at least one side wall (107) being a plane surface.
5. Railway bogie according to claim 3
characterized in that
the at least one bracket (201) comprises at least one side wall (207) having a curved section.
6. Railway bogie according to claim 5
characterized in that
the at least one side wall (207) has a curved section defining the obtuse angle β with the upper surface (Si) and the acute angle a with the lower surface (S2) , the said angles a and β being substantially equal to 90° at the junction between the side wall (207) and the lateral wall (106) and then the angle β constantly increasing while the angle a constantly decreasing up to the extreme left end of the side wall (207) curvature.
7. Railway bogie according to any of the previous claims characterized in that
the at least one bracket (301) comprises a lateral wall (106) and a recess (307) .
8. Railway bogie according to any of the previous claims characterized in that
the at least one bracket (101; 201; 301) is positioned under a horizontal section (115) of the bogie frame (7) .
9. Railway bogie according to any of the previous claims characterized in that
the at least one axlebox (2) comprises at least two suspensions (6) and the adapter (100; 200; 300) comprises a first bracket (101; 201; 301) and a second bracket (102; 302) at each end which are linked together by an elongated part (105; 305) , any additional bracket being optionally placed between the said first and second brackets and fast with the elongated part (105; 305) .
10. Railway bogie according to claim 9
characterized in that
the first bracket (101; 201; 301) is located under a horizontal section (115) of the bogie frame (7) and the second bracket is placed under an inclined section (109) of the bogie frame (7) .
11. Railway bogie according to any of the previous claims characterized in that
the at least one bracket (101, 102; 201; 301; 302) comprises lateral and side walls (106, 107; 207; 110) having a thickness comprised between 10 and 20 mm.
12. Railway bogie according to any of the previous claims characterized in that
the assembling plate (103) is provided with an assembling opening (108; 111) in which assembling means (8) can fit.
13. Railway bogie according to any of the previous claims characterized in that
the adapter (300) is entirely molded.
14. Railway bogie according to any of the claims 1 to 12 characterized in that
the adapter (100; 200) is manufactured by parts welded together .
15. Railway bogie according to any of the previous claims characterized in that the adapter (100; 200; 300) fast with the bogie frame (7) cooperates with at least one adapter fast with the at least one suspension (6) in order to have the wheelset able to support the bogie frame (7) .
16. Railway coach comprising at least one railway bogie (1) according to any of the previous claims, the said railway coach being mounted upon the said at least one railway bogie (1) .
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2011/002651 WO2013030616A1 (en) | 2011-08-26 | 2011-08-26 | Railway bogie assembly with adapter for suspension |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP2748048A1 true EP2748048A1 (en) | 2014-07-02 |
Family
ID=45478370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP11808317.9A Withdrawn EP2748048A1 (en) | 2011-08-26 | 2011-08-26 | Railway bogie assembly with adapter for suspension |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP2748048A1 (en) |
| CN (1) | CN103889809A (en) |
| WO (1) | WO2013030616A1 (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2062797C3 (en) * | 1970-12-19 | 1978-10-12 | Thyssen Industrie Ag, 4300 Essen | Suspension for vehicles |
| US4552074A (en) * | 1983-11-21 | 1985-11-12 | Amsted Industries Incorporated | Primary suspension for railroad car truck |
| CN2375534Y (en) * | 1999-06-03 | 2000-04-26 | 株洲车辆厂 | Integral structural welded bogie for railway wagon |
| DE10064769A1 (en) | 2000-12-22 | 2002-08-29 | Contitech Luftfedersyst Gmbh | Hydro spring |
| KR101139174B1 (en) * | 2004-03-26 | 2012-04-26 | 콘티테크 루프트페더지스테메 게엠베하 | Axlebox-spring-unit |
| DE102008042198B4 (en) * | 2008-09-18 | 2012-03-08 | Andreas Fiedler | Freight car bogie |
-
2011
- 2011-08-26 WO PCT/IB2011/002651 patent/WO2013030616A1/en active Application Filing
- 2011-08-26 EP EP11808317.9A patent/EP2748048A1/en not_active Withdrawn
- 2011-08-26 CN CN201180074355.XA patent/CN103889809A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2013030616A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2013030616A1 (en) | 2013-03-07 |
| CN103889809A (en) | 2014-06-25 |
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