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
  • B61F5/305—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes incorporating rubber springs

Definitions

• the invention relates to a railway bogie assembly comprising at least one hydraulic suspension and having an adapter assembly being required for assembling the said hydraulic suspension to a bogie frame.
• a railway bogie comprising helical springs is well known.
• the said helical springs are mounted integral on the lower part of the axlebox and connected with the bogie frame using caps integral with the bogie frame for fixing the top of the helical springs.
• the US application US2002- 0089102 Al discloses a hydraulic suspension comprising a membrane that can be used in rail vehicles.
• the patent DE 102005004721 B4 discloses the bogie assembly with such a hydraulic spring.
• Such a railway bogie assembly 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;
• a bridging adapter attached to the said bogie frame on one hand and to the said at least one hydraulic suspension .
• the bridging adapter disclosed in WO2005/091698 is not suitable for an industrial manufacturing since it presents two major drawbacks.
• the bridging adapter design does not allow an easy and efficient assembling process of the bogie frame to the axlebox equipped with the hydraulic suspensions.
• the bridging adapter has to be first attached to the hydraulic suspensions by bolts, and then the resulting assembly is attached (by welding for example) to the bogie frame. Precise assembling is particularly difficult to achieve by doing so.
• fixing means such that bolts can support axial efforts but may be damaged or even break in case of shear stress.
• One object of the present invention is to overcome these drawbacks by providing an improved railway bogie assembly comprising at least one axlebox and at least one suspension, so that the railway bogie has an adapter assembly facilitating the assembling process and having improved assembly rigidity.
• such an adapter assembly is characterized in that it comprises a first adapter fast with the at least one suspension and a second adapter fast with the frame bogie, these said first and second adapters being able to cooperate in order to have the wheelset able to support the bogie frame .
• the second adapter comprises at least one bracket which is fast with an assembling plate on its bottom surface.
• the upper surface of the at least one bracket is directly fast with the bogie frame or fast with an elongated part which is fast with the bogie frame.
• the first adapter consists in a spigot which protrudes from the centre of the suspension.
• the spigot has a cylindrical shape.
• the first adapter also comprises an attachment base having a disc shape.
• This attachment base is provided with a lower surface fast with an assembling surface defined on top of the suspension.
• This attachment base is also provided with an upper surface wherein the assembling plate of a second adapter bracket is dedicated to rest. The spigot protrudes perpendicularly from the assembling surface through a traversing hole.
• the spigot and the attachment base form a unique device.
• the assembling plate of the second adapter bracket is traversed by an assembling opening through which is inserted the spigot of the first adapter.
• the assembling opening is circular and has substantially the same diameter as the cylindrical shape of the spigot, and the height of the spigot cylindrical shape is substantially equal to or greater than the thickness of the assembling plate. Then when the spigot is inserted into the bracket opening, there is no clearance between the two mounted parts and no radial movement.
• such an adapter assembly may incorporate one or several of the following features as long as there is no contradiction:
• the upper surface of the base attachment of the first adapter is substantially equal to or greater than the lower surface of the said base attachment.
• the upper surface of the base attachment of the first adapter is substantially equal to or greater than the surface of the associated assembling plate of each second adapter bracket.
• the lower surface of the base attachment of the first adapter is substantially equal to the assembling surface defined on top of each suspension.
• the spigot has a lower cylindrical part and an upper part having a truncated conical shape.
• the spigot is the extension of a metallic centrepiece of the suspension.
• the spigot is welded, or glued, or fixed by bolts or by any other connecting means to the suspension and/or the base attachment of the first adapter.
• the axlebox is equipped with at least two suspensions.
• the second 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 located between the said first and second brackets and fast with the elongated part.
• Such an elongated part permits a facilitated assembling and a better adjustment of the second adapter positioning on the bogie frame compared to the use of separated and distinct brackets.
• the elongated part enables a better distribution of forces and avoids having too important stress on the brackets alone .
• the second adapter has a first bracket positioned under the straight lower part of the frame bogie and a second bracket positioned under the curved lower part of the frame bogie.
• Brackets of the second adapter positioned under the straight lower part of the frame bogie defines an empty volume between its surrounding side walls, the elongated part on the top and the assembling plate on the underside, this empty volume being such that the lower surface covered by the assembling plate is strictly greater than the upper surface covered by the elongated plate .
• One bracket of the second adapter positioned under the straight lower part of the frame bogie is provided with a lateral wall which covers three faces and has right angles with both the assembling plate and the straight end of the elongated part, and a bracket extreme end surface.
• the bracket extreme end surface is covered by a plane side wall being inclined and forming an obtuse angle with the elongated part, and an acute angle with the assembling plate.
• the bracket extreme end surface is a recess.
• Bracket of the second adapter positioned under the inclined lower part of the frame bogie is provided with a surrounding wall defining an empty volume with the inclined section of the elongated part on the top, and the assembling plate on the underside.
• this bracket is provided with an upper opening on its upper surface.
• this bracket is provided with a recess forming a wide upper opening on its upper surface, the elongated part being directly attached to the surrounding wall of the bracket and not covering the bracket empty volume. Therefore the upper part of the spigot can fit in the elongated part thickness enabling an optimization of the necessary available space and a reduction of the necessary material quantity can be obtained.
• - Brackets are rigidly maintained to the elongated part and/or the frame bogie by rigidity means.
• the complete second adapter is molded.
• the second adapter is preferably welded to the frame bogie by the elongated part.
• the railway bogie assembly comprises hydraulic suspension (s ) .
• the assembly process implies the following steps:
• the wheel set comprising the axle, the wheels, the axleboxes and the suspensions are all mounted together ;
• the first adapters are fast with the suspensions, by bolts inserted in bores for example;
• the second adapters are fast with the frame bogie, by welding for example;
• Spigots of each first adapter are inserted in the same time in the associated bracket assembling openings.
• the invention concerns a railway coach which is mounted upon the railway bogie.
• the railway coach may be directly supported by the bogie frame for permitting the railway coach displacement on rail tracks.
• 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 having hydraulic springs;
• Figure 4 is a perspective view of the first adapter
• Figures 5a to 5e are face, top, bottom, right and left side views respectively of the second adapter according to one embodiment
• Figure 6 is a perspective view of the left part of the railway bogie assembly according to another embodiment.
• Figure 7 is a longitudinal cross section of the adapter according to another embodiment mounted on the axlebox having hydraulic springs.
• FIGS. 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 hydraulic suspensions 6 are mounted on each of said link arms 5.
• the attachment between each link arm 5 with its associated hydraulic suspension 6 is not limited to the one disclosed in WO2005/091698 and can be of any other type.
• the link arms 5 and their associated suspensions 6 are symmetrical about a substantially vertical axis Xi-Xi' through the middle of the axlebox 2.
• the vertical axis Xi-X is perpendicular to the substantially horizontal axis X-X' .
• the railway bogie assembly 1 also comprises a bogie frame 7 and an adapter assembly 8 shown in Figure 3 which discloses a longitudinal cross section of the adapter assembly whereby the cut is directed according to a plane being defined by the axes of rotational symmetry of the two hydraulic suspensions 6.
• the bogie frame 7 is mounted on the axleboxes via the hydraulic suspensions 6 and an adapter assembly 8 wherein a first adapter 80 is fast to each suspension and a second adapter 100 is fast integral to the bogie frame 7.
• the first adapter 80 comprises an attachment base 81 having a disc shape with an upper surface 83 greater than the lower surface 82.
• the attachment base 81 of the first adapter 80 has an upper surface 83 which is dedicated to be in contact with one of the- brackets 101, 102 of the second adapter 100.
• the said upper surface 83 is greater than the surface of the associated assembling plate 103, 104 of each bracket 101, 102 of the second adapter 100.
• the first adapter 80 comprises a spigot 84 which protrudes perpendicularly from the centre of the upper surface 83.
• the spigot axis of symmetry is parallel with the vertical axis X3.-X1' .
• the spigot 84 has a lower cylindrical part 86 and an upper part 87 having a truncated conical shape.
• the first adapter 80 is formed in one unique device. According to another embodiment of the first adapter 80 not shown here, the spigot 84 and the base attachment are two separated parts mounted together during the assembly process .
• the hydraulic suspension 6 and the first adapter 80 have bores for attaching them together via two bolts 85.
• the second 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 end bracket 101 comprises a lateral wall 106 which is parallel with the vertical axis ⁇ - ⁇ ' .
• the cross-section along a horizontal plane X2- 2' of the lateral wall 106 has a U-shape.
• a side wall 107 which is a plane surface is fast with the lateral wall 106.
• An empty volume defined by the walls 106, 107 defines a lower surface S2 and an upper surface Si.
• the lower surface S 2 is covered by the assembling plate 103 on the underside and the upper surface Sx is covered on the top by the elongated part 105
• the empty volume is such that the lower surface S 2 is strictly greater than the upper surface S 1 .
• the plane side wall 107 is then inclined forming an obtuse angle ⁇ with the elongated part 105, and an acute angle a 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.
• ⁇ empty volume is defined by a surrounding wall 110, the elongated part 105 on the top, and the assembling plate 104 on the underside.
• Each assembling plate 103, 104 is traversed by an opening 108, 111 respectively through which is inserted the spigot 84 of the left first adapter 80, the said spigot fitting into the bracket empty volume.
• the assembling openings 108, 111 are circular and have the same diameter as the lower cylindrical part 86 of the spigot 84, and the height of the lower cylindrical part 86 of the spigot 84 is substantially greater than the thickness of the assembling plates 103, 104.
• 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 the upper part 87 having a truncated conical shape of the spigot 84 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.
• FIGS 6 and 7 present an adapter assembly 10 according to the second embodiment of the invention.
• the second adapter 200 also comprises a first bracket 201 and a second bracket 202 at each end, linked together by an elongated part 205.
• the first bracket 201 comprises a lateral wall 206 which is parallel with the vertical axis ⁇ - ⁇ ' .
• the cross-section along a horizontal plane X 2 -X2' of the lateral wall 206 has a U-shape.
• a recess 207 is provided on the left side of the lateral wall 206.
• the empty volume defined by the lateral wall 206 and the recess 207 is covered on the top by the left end of the elongated part 205 and on the underside by the assembling plate 203.
• the recess 207 has an inclined plane shape and forms an obtuse angle with the elongated part 205, and an acute angle with the assembling plate 203.
• the second bracket 202 of the second adapter 200 is placed under the inclined section of the frame bogie 7.
• An empty volume is defined by the surrounding wall 210, the inclined section of the frame bogie 7 on the top, and the assembling plate 204 on the underside.
• the elongated part 205 is directly attached to the surrounding wall 210 and does not cover the bracket empty volume.
• the upper inclined surface is then provided with a wide upper opening 212 in which the upper part 87 having a truncated conical shape of the spigot 84 can accommodate.
• Each assembling plate 203, 204 is traversed by an opening 208,
• brackets 201 and 202 are rigidly maintained to the elongated part 205 by rigidity means 213, 214.
• 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 W
• the assembly, process implies the ' following steps:
• the first adapters 80 are fast with the hydraulic suspensions 6, by bolts 85 inserted in bores 84 for example;
• the second adapters 100 or 200 are fast with the frame bogie 7 by welding for example, with as many second adapters 100, 200 as there are axleboxes 2;

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Vehicle Body Suspensions (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=45406786

Family Applications (1)

Country Status (3)

Cited By (1)

Families Citing this family (1)

Family Cites Families (7)

• 2011
  • 2011-08-26 CN CN201180074356.4A patent/CN103917428A/zh active Pending
  • 2011-08-26 WO PCT/IB2011/002646 patent/WO2013030614A1/en active Application Filing
  • 2011-08-26 EP EP11801819.1A patent/EP2748047A1/de not_active Withdrawn

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events