EP1232085A1 - Entretoise pour structure de boggies - Google Patents
Entretoise pour structure de boggiesInfo
- Publication number
- EP1232085A1 EP1232085A1 EP00981429A EP00981429A EP1232085A1 EP 1232085 A1 EP1232085 A1 EP 1232085A1 EP 00981429 A EP00981429 A EP 00981429A EP 00981429 A EP00981429 A EP 00981429A EP 1232085 A1 EP1232085 A1 EP 1232085A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- elements
- sole
- spacer
- stresses
- curve
- 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.)
- Granted
Links
- 239000000463 material Substances 0.000 claims abstract description 6
- 229910052751 metal Inorganic materials 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims abstract description 4
- 125000006850 spacer group Chemical group 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- B61F5/50—Other details
- B61F5/52—Bogie frames
Definitions
- the present invention relates to improvements to the structures of bogies, in particular of the type intended to maintain freight wagons.
- the longitudinal beams In order to be able to support large loads, the longitudinal beams have, in their central part, a very thick zone which, conventionally in terms of resistance of the materials, is provided with a light making it possible to reduce the weight of this beam while at the same time retaining sufficient rigidity.
- the profile of this light substantially resembles that of the beam, that is to say that its upper part is generally rectilinear and parallel to the rectilinear upper face of the beam, this upper part being joined to the parallel base of the light by two inclined sides which are connected to the upper part by rounding.
- the entire periphery of the light is bordered by a sole which reinforces the rigidity of the beam in the area of the light.
- the upper and lower parts of the sole can merge with the upper and lower faces of the central crosspiece which is connected at this level with the two longitudinal beams.
- the present invention aims to avoid the aforementioned drawbacks by proposing a connecting spacer which resists the fatigue stresses suffered by the beams of the bogies when they are used.
- the subject of the present invention is therefore a connecting cross section of substantially U-shaped cross section ensuring an angular connection between two sole elements of a recess produced in a beam of the structure of a bogie, in particular for a freight wagon, characterized in that it is made of a material of a different nature from that of the other elements of the sole with which it is connected, so that its resistance at maximum fatigue is represented on the curve expressing the variation in dynamic stresses as a function of the average stresses for a metal considered, by a point situated inside said curve.
- at least one of the branches of the spacer has a thickness that is thinner than that of the sole elements to which it is connected. The thickness of this branch will preferably be of the order of 0.8 times that of said elements.
- each of the two branches of the connecting spacer will be given a sufficient length such that the junction of this branch with the sole element to which it is connected is located outside the areas of significant stress experienced by these items in use.
- connection with the elements of the sole will be carried out so that their external parts are aligned and the variations in thickness are manifested on the interior of the elements and of the spacer.
- FIG. 1 is an elevation view of a longitudinal beam of a bogie.
- Figure 2 is a cross-sectional view on an enlarged scale of a detail of implementation of the connecting spacer shown in Figure 1 along line II-II thereof.
- Figure 3 is a partial longitudinal vertical sectional view on an enlarged scale of a connecting spacer according to the invention and the elements to which it is connected.
- FIG. 4 is a partial detail view on an enlarged scale of the connecting spacer shown in FIG. 3.
- FIG. 5 is a graph (known as a Haigh graph) representing the variation of the dynamic stresses as a function of the average stresses undergone by determined zones of the structure.
- FIG. 1 a longitudinal beam 1 for bogie whose central part is thicker in order to be able to withstand the significant bending stresses to which this beam is subjected during use.
- the latter is provided with a central window 3.
- This central window has an upper side and a lower side which are parallel to the upper face of the beam 1.
- the lower side which is shorter, is connected, at each of its ends, to the upper side by an inclined part followed by 'a rounded part.
- the structure of the bogie, and in particular the beam 1 is produced in the so-called mechanically welded technique, that is to say that it is made up of cut sheet metal elements which are welded together.
- the cross section of this beam 1 has an overall shape in I, that is to say that it has two parallel horizontal branches respectively upper and lower la and lb which are joined by a core central on.
- the window 3 is bordered, over its entire periphery by a sole 5, that is to say by a sheet metal element perpendicular to the core 1c.
- This sole thus comprises an upper part 5a and a lower part 5b of shorter length which are parallel to the upper branch 1a of the longitudinal beam 1 and which constitute the upper and lower ends of the central cross member of the bogie.
- These upper 5a and lower 5b parts of the sole 5 are joined by an inclined part 5c, which is parallel to the lower branch lb of the beam 1, and by a connecting spacer 5d whose cross section is in the shape of a slightly open U .
- This connecting spacer 5d is linked to the upper part 5a and to the inclined part 5c by welding.
- This connecting spacer 5d is the part which, according to the prior art, is subjected to stresses, and in particular fatigue stresses, such that at the end of a certain period of use, it is the place for the formation of cracks which then cause outright rupture of the longitudinal beam 1.
- the connecting spacer 5d will be produced from a material of a different nature from that constituting the other parts of this peripheral sole 5. It has in fact been found that choosing a constituent material of this 5d connecting spacer a steel capable of withstanding higher fatigue stresses, the cracking of the spacer and the rupture of the longitudinal beam 1 were avoided. It was also found, during the multiples tests carried out by the applicant that, surprisingly, the resistance to fatigue undergone by this zone of the structure was improved by reducing in a certain proportion the thickness of the connecting spacer 5d.
- the maximum resistance to various stresses is obtained by giving the connecting spacer 5d a thickness of 14 mm. In such an embodiment, it is thus found that the maximum resistance is obtained for a thickness of a connecting spacer less than that of the inclined sole 5c.
- the lengths e and e 'of the branches of the connecting spacer 5d are such that the zone in which the connection of these branches takes place with the upper flanges 5a and inclined 5c lie outside a zone of critical stress to fatigue.
- connection between the inclined sole 5c and the connecting spacer 5d will be done in such a way that the external parts of these elements are aligned with respect to the line delimiting the window 3, the variations d 'thickness of the two elements then existing on the side of one inside thereof.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laminated Bodies (AREA)
- Connection Of Plates (AREA)
- Fluid-Damping Devices (AREA)
- Body Structure For Vehicles (AREA)
- Vehicle Body Suspensions (AREA)
- Lining And Supports For Tunnels (AREA)
- Moulding By Coating Moulds (AREA)
- Finger-Pressure Massage (AREA)
- Prostheses (AREA)
- Packages (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9914443 | 1999-11-17 | ||
| FR9914443A FR2801021B1 (fr) | 1999-11-17 | 1999-11-17 | Entretoise pour structure de boggies |
| PCT/FR2000/003202 WO2001036246A1 (fr) | 1999-11-17 | 2000-11-17 | Entretoise pour structure de boggies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1232085A1 true EP1232085A1 (fr) | 2002-08-21 |
| EP1232085B1 EP1232085B1 (fr) | 2004-02-18 |
Family
ID=9552206
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP00981429A Expired - Lifetime EP1232085B1 (fr) | 1999-11-17 | 2000-11-17 | Entretoise pour structure de boggies |
Country Status (9)
| Country | Link |
|---|---|
| EP (1) | EP1232085B1 (fr) |
| AT (1) | ATE259731T1 (fr) |
| AU (1) | AU1868101A (fr) |
| DE (1) | DE60008412D1 (fr) |
| FR (1) | FR2801021B1 (fr) |
| HU (1) | HUP0203947A2 (fr) |
| PL (1) | PL198647B1 (fr) |
| SK (1) | SK287263B6 (fr) |
| WO (1) | WO2001036246A1 (fr) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10207721B2 (en) | 2014-03-19 | 2019-02-19 | Siemens Ag Österreich | Bogie frame |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2338684A (en) * | 1938-12-24 | 1944-01-04 | American Steel Foundries | Side frame |
| FR1455797A (fr) * | 1964-10-28 | 1966-05-20 | Sncf | Perfectionnements apportés aux bogies de véhicules ferroviaires comportant un châssis soudé à traverse centrale et longerons solidaires |
| US5305694A (en) * | 1993-06-17 | 1994-04-26 | Amsted Industries Incorporated | Sideframe with increased fatigue life having longer cross-sectional thickness transition zone |
-
1999
- 1999-11-17 FR FR9914443A patent/FR2801021B1/fr not_active Expired - Lifetime
-
2000
- 2000-11-17 EP EP00981429A patent/EP1232085B1/fr not_active Expired - Lifetime
- 2000-11-17 SK SK682-2002A patent/SK287263B6/sk not_active IP Right Cessation
- 2000-11-17 WO PCT/FR2000/003202 patent/WO2001036246A1/fr not_active Ceased
- 2000-11-17 AU AU18681/01A patent/AU1868101A/en not_active Abandoned
- 2000-11-17 DE DE60008412T patent/DE60008412D1/de not_active Expired - Lifetime
- 2000-11-17 PL PL355574A patent/PL198647B1/pl unknown
- 2000-11-17 AT AT00981429T patent/ATE259731T1/de not_active IP Right Cessation
- 2000-11-17 HU HU0203947A patent/HUP0203947A2/hu unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO0136246A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10207721B2 (en) | 2014-03-19 | 2019-02-19 | Siemens Ag Österreich | Bogie frame |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2001036246A1 (fr) | 2001-05-25 |
| PL198647B1 (pl) | 2008-07-31 |
| HUP0203947A2 (en) | 2003-03-28 |
| ATE259731T1 (de) | 2004-03-15 |
| AU1868101A (en) | 2001-05-30 |
| SK287263B6 (sk) | 2010-04-07 |
| SK6822002A3 (en) | 2002-11-06 |
| DE60008412D1 (de) | 2004-03-25 |
| FR2801021A1 (fr) | 2001-05-18 |
| EP1232085B1 (fr) | 2004-02-18 |
| PL355574A1 (en) | 2004-05-04 |
| FR2801021B1 (fr) | 2001-12-28 |
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