EP0434642A2 - Bogie, notamment pour matériel roulant ferroviaire - Google Patents

Bogie, notamment pour matériel roulant ferroviaire Download PDF

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Publication number
EP0434642A2
EP0434642A2 EP90830590A EP90830590A EP0434642A2 EP 0434642 A2 EP0434642 A2 EP 0434642A2 EP 90830590 A EP90830590 A EP 90830590A EP 90830590 A EP90830590 A EP 90830590A EP 0434642 A2 EP0434642 A2 EP 0434642A2
Authority
EP
European Patent Office
Prior art keywords
bogie
frame
axle
swing bolster
pair
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Withdrawn
Application number
EP90830590A
Other languages
German (de)
English (en)
Other versions
EP0434642A3 (en
Inventor
Luigi Niccolai
Antonello Gallone
Rodolfo Forzoni
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Breda Costruzioni Ferroviarie SPA
Original Assignee
Breda Costruzioni Ferroviarie SPA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Breda Costruzioni Ferroviarie SPA filed Critical Breda Costruzioni Ferroviarie SPA
Publication of EP0434642A2 publication Critical patent/EP0434642A2/fr
Publication of EP0434642A3 publication Critical patent/EP0434642A3/en
Withdrawn legal-status Critical Current

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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
    • 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
    • B61F5/32—Guides, e.g. plates, for axle-boxes

Definitions

  • the present invention relates to a rail bogie, in particular for rolling stock utilized in high speed travel.
  • the invention relates to a load bearing bogie for passenger carriages designed for operation at speeds up to 300 km/h.
  • the bogie In the art field of vehicles designed to run on a permanent way, the bogie, be it locomotive or load bearing, provides the means whereby traction and braking forces generated by the contact between wheels and rails are transmitted to the vehicle body, and whereby the body is allowed to pivot about a vertical axis passing through its centre of symmetry; the bogie also carries the dead weight of the body and interacts with it in the exchange of such other forces as are generated in transit (flange impact, centrifugal force, etc.).
  • a standard bogie for rolling stock comprises a pair of wheel sets, each comprising an axle with two keyed wheels, a pair of disks forming part of the carriage braking system, and an axle box and bearing assembly at each end for supporting the vertical load.
  • the wheel sets are piloted elastically by a frame, that in turn supports a swing bolster to which the vehicle body is connected in a pivotable manner about a vertical axis of symmetry.
  • the standard bogie thus embodied incorporates a dual-suspension system, comprising a first stage between axle box and bogie frame, and a second stage between frame and swing bolster.
  • An object of the present invention is to provide a bogie for high speed rolling stock that affords a comprehensive and optimized solution to the various requirements in question, within the framework of a standard bogie design as specified above.
  • a further object of the invention is to provide a high speed bogie that can be adapted easily to the various requirements of national and international railway systems and modularized to suit different applications (public railway, underground and tram networks, etc.).
  • Another object of the invention is to provide a bogie of the above mentioned type wherein the operations of lifting and rerailing are considerably simple, without the need of disconnecting the vehicle body and the bogie.
  • a fundamental and novel feature of the present invention consists in the fact that the bogie frame is elastically connected to the axle boxes of the wheel sets by way of conventional Silentblock type mountings, whilst the swing bolster, bearing the weight of the vehicle body, rests directly on the axle boxes by way of elastic supports.
  • the guidance of the wheel sets can be optimized by careful selection of the transverse and longitudinal stiffnesses (Ky, Kx respectively) of the connection between frame and wheel sets, which in turn will result in optimized performance characteristics of the bogie from the aspects of dynamic stability and curve inscribability.
  • bogie frame is not rigid, but articulated, with the cross members connected by ball joints disposed symmetrically and diagonally aligned in relation to the centre of the structure.
  • a bogie frame of substantially "H" shape comprising two parallel longitudinal box members 2 each of which exhibits an enlarged middle section 2a and two end sections 2b extending at a level lower than that of the middle section 2a.
  • the two longitudinal members 2 are interconnected at each end of their respective middle sections 2a by two hollow cross members 3.
  • Each such cross member 3 comprises two sections 3a and 3b of dissimilar length rigidly associated with the relative longitudinal member 2 and connected one with the other by way of a ball joint 4; the frame 1 thus is articulated, and the vehicle remains stable when negotiating skew lengths of track.
  • the ball joints 4 incorporated into the two cross members 3 will be standard production items, and are positioned symmetrically in relation to the centre of the bogie, in diagonal alignment, such that the frame 1 can follow the movement of the wheel sets when encountering any irregularity in the permanent way, while retaining the necessary rigidity in all other planes of action.
  • Two conventional wheel sets 6 are provided each comprising an axle 7, disposed perpendicular to the two longitudinal members 2 of the bogie frame 1, a pair of wheels 8 keyed to the axle 7, a pair of axle boxes 11 with integral brackets, accommodating bearings 12 to support the two ends of the axle 7, and a pair of disks 9 keyed to the axle between the two wheels 8.
  • Each disk 9 constitutes the moving part of a respective brake assembly 10 of the conventional type and therefore not described in detail, of which the stationary caliper part is mounted to the corresponding end of one of a pair of parallel longitudinal beams 4, each connected to the cross members 3 substantially in alignment with the ball joints 4 and disposed symmetrically in relation to the centre of the bogie.
  • Each beam 5 serve to withstand the braking forces generated axially in opposing directions between the caliper 10 and the relative disk 9 at each end.
  • each of the axle boxes 11 incorporates a pair of brackets 13 disposed symmetrically in relation to the axle 7 and accommodating two flexible annular cushions 14 that occupy horizontal positions within a common plane below the wheel axis and are thus likewise symmetrically disposed on either side of the axle.
  • Each cushion 14 comprises an annular layer of rubber 27 sandwiched between two annular layers of aluminium 26.
  • the centre of each bracket 13 affords a tubular seating 15 capable of accommodating a vertical pin 16 in conjunction with a flexible coupling 17 of Silentblock type embodiment, by which the pin is held in position.
  • the pin 16 engages in a further seating 18 formed in the end portion 2b of the longitudinal frame member 2 and is fastened at its two ends, in the Silentblock and in the seating 18 respectively with nuts 19.
  • This lower seating 18 passes completely through the longitudinal frame member 2 and is sealed at bottom by a plug 20; thus, the frame is easily dismantled for the purpose of servicing the axle 7.
  • a swing bolster for supporting the vehicle body, which is of essentially "H" shaped embodiment and comprises two parallel longitudinal box member 22 interconnected by two hollow cross members 23, of which the central parts carry a welded socket 24 to accommodate the king bolt (not shown) of the body.
  • the two longitudinal members 22 of swing bolster 21 are disposed parallel with and directly above the corresponding members 2 of the bogie frame 1.
  • the swing bolster 21 is supported elastically by the four axle boxes 11, and, more exactly, each end of the two longitudinal members 22 rests on a pair of coil springs 25 positioned on and extending upwardly from the two cushions 14, coaxial with the seatings 15.
  • Each spring 25 thus encompasses the seating 15 of the pin 16, and registers with the underside of the respective longitudinal member 22 in conjunction with a further tubular seating 15a and a further cushion 14.
  • connection between the vehicle body and the bogie is ensured by way of shoes 43 on either flank and on the king bolt and socket 24 at centre, the various mating surfaces being embodied in self-lubrificating materials of conventional type offering proven reliability in terms both of function and duration.
  • the torque generated through the shoes 43 in response to the rotational movement of the body provides a turning moment of which the value balances the performance of the vehicle in respect of curve inscribability (flange impact) and dynamic stability, counteracting the tendency to hunt and increasing critical velocity.
  • two abutment surfaces 28a and 29a positioned to the rear of the slot 28 and below the stop 29, respectively, also serve to check the relative movement of the frame and the bolster, and in this instance to keep any contracting movement within the elastic reaction limits of the coil springs 25.
  • each axle box 11 in a position alongside one of the two coil springs 25, there is a vertically disposed hydraulic damper strut 30 anchored uppermost to a pair of lugs 31 and sidewise extending from the longitudinal member 22 of the bolster 21, while at bottom is supported by corresponding lugs 32 projecting from the axle box 11.
  • the bogie further comprises two vertical arms 33, welded on both side of the frame 1 in correspondance to each projecting end of one of the cross members 3, and two respective connecting rods 34 elastically articulated at one end to vertical arms 33 and at the other to pins 35 located externally of the longitudinal members 22 of the swing bolster 21 and firmly connected to one of the relative cross member 23 of swing bolster 21.
  • an anti-pitch torque is generated by the vertical arm 33 and the rod 34.
  • the lenght of the vertical arm 33 is calculated such that this torque will oppose the pitching torque to which the frame 1 is subjected by application of the brakes, and which tends to load the front suspension to a greater extent that the rear, considered in the direction of forward motion.
  • twin coil spring 25 and cushion 14 assemblies described above also enable lateral movement in the suspension, responding transverserly to relative movement of the bolster 21 and the frame 1 in the transverse direction, and operating in conjunction with rubber buffers 44 (fig. 4) which are made secure to the damper mountings 41 and register with plates 45 afforded by the corresponding longitudinal bolster members 22.
  • the effect when compared with current suspension systems, is to give enhanced passanger comfort in the transverse axis.
  • Both shoe 43 and plates 45 are made of a self-lubricating material of the known type.
  • the cross members 3 of the bogie frame 1 in correspondance of the wheel 8 also supports conventional shoe brake devices generally indicated at 42.
  • the frame 1 of the bogie according to the invention is relieved of vertical load generated by the weight of the vehicle body; instead, this preponderant load is distributed directly through the swing bolster to the axle boxes, in parallel with other longitudinal and transverse load components transferred from the axles to the body, likewise by way of the frame 1.
  • the bogie frame disclosed can be of reduced mass and has a guide function essentially. In construction, therefore, it becomes possible to utilize components of proven reliability, moderately innovative in embodiment, and accordingly to synergize the properties of the various parts of the bogie such that an optimum ratio is obtained between bending stiffness and shear stiffness in the connection between the two axles.
  • the realization of near optimum values for this ratio reflects the maximum performance obtainable from a bogie with sprung axles, in respect of curve inscribability and dynamic stability.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vibration Prevention Devices (AREA)
  • Braking Arrangements (AREA)
EP19900830590 1989-12-22 1990-12-17 A bogie, in particular for high speed rolling stock Withdrawn EP0434642A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT958889 1989-12-22
IT9588A IT1236097B (it) 1989-12-22 1989-12-22 Carrello per veicoli su rotaia, in particolare destinati alle alte velocita'

Publications (2)

Publication Number Publication Date
EP0434642A2 true EP0434642A2 (fr) 1991-06-26
EP0434642A3 EP0434642A3 (en) 1991-12-04

Family

ID=11132527

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900830590 Withdrawn EP0434642A3 (en) 1989-12-22 1990-12-17 A bogie, in particular for high speed rolling stock

Country Status (2)

Country Link
EP (1) EP0434642A3 (fr)
IT (1) IT1236097B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2720362A1 (fr) * 1994-05-30 1995-12-01 Gec Alsthom Transport Sa Chassis de bogie.
CN113459931A (zh) * 2021-08-09 2021-10-01 中车大连机车车辆有限公司 一种转向架运输时固定轴箱体的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3313245A (en) * 1964-08-10 1967-04-11 Rockwell Mfg Co Railway trucks
US3948188A (en) * 1970-06-05 1976-04-06 Swiss Aluminium Ltd. Resilient railway bogie
EP0345708A1 (fr) * 1988-06-08 1989-12-13 Gec Alsthom Sa Chassis de bogie

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3313245A (en) * 1964-08-10 1967-04-11 Rockwell Mfg Co Railway trucks
US3948188A (en) * 1970-06-05 1976-04-06 Swiss Aluminium Ltd. Resilient railway bogie
EP0345708A1 (fr) * 1988-06-08 1989-12-13 Gec Alsthom Sa Chassis de bogie

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ZEITSCHRIFT F]R EISENBAHNWESEN UND VERKEHRSTECHNIK. GLASERS ANNALEN, vol. 106, no. 11, November 1982, pages 382-389; F. FREDERICH et al.: "Ein neuartiges Drehgestell mit direktabfederung" *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2720362A1 (fr) * 1994-05-30 1995-12-01 Gec Alsthom Transport Sa Chassis de bogie.
EP0685377A1 (fr) * 1994-05-30 1995-12-06 Gec Alsthom Transport Sa Chassis de bogie
US5653177A (en) * 1994-05-30 1997-08-05 Gec Alsthom Transport Sa Bogie frame
CN113459931A (zh) * 2021-08-09 2021-10-01 中车大连机车车辆有限公司 一种转向架运输时固定轴箱体的方法

Also Published As

Publication number Publication date
IT1236097B (it) 1992-12-22
IT8909588A0 (it) 1989-12-22
EP0434642A3 (en) 1991-12-04

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