EP0132235B1 - Mechanism for connecting a bush for railway axles to the frame of a bogie of a railway vehicle - Google Patents

Mechanism for connecting a bush for railway axles to the frame of a bogie of a railway vehicle Download PDF

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Publication number
EP0132235B1
EP0132235B1 EP84830185A EP84830185A EP0132235B1 EP 0132235 B1 EP0132235 B1 EP 0132235B1 EP 84830185 A EP84830185 A EP 84830185A EP 84830185 A EP84830185 A EP 84830185A EP 0132235 B1 EP0132235 B1 EP 0132235B1
Authority
EP
European Patent Office
Prior art keywords
frame
bogie
sleeves
axle box
push rod
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.)
Expired
Application number
EP84830185A
Other languages
German (de)
French (fr)
Other versions
EP0132235A2 (en
EP0132235A3 (en
Inventor
Roberto Casalone Rinaldi
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.)
Fiat Ferroviaria Savigliano SpA
Original Assignee
Fiat Ferroviaria Savigliano 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 Fiat Ferroviaria Savigliano SpA filed Critical Fiat Ferroviaria Savigliano SpA
Priority to AT84830185T priority Critical patent/ATE45317T1/en
Publication of EP0132235A2 publication Critical patent/EP0132235A2/en
Publication of EP0132235A3 publication Critical patent/EP0132235A3/en
Application granted granted Critical
Publication of EP0132235B1 publication Critical patent/EP0132235B1/en
Expired 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
    • B61F5/26—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
    • B61F5/325—The guiding device including swinging arms or the like to ensure the parallelism of the axles
    • 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
    • B61F15/00—Axle-boxes
    • B61F15/02—Axle-boxes with journal bearings
    • B61F15/04—Axle-boxes with journal bearings for locomotives

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Springs (AREA)
  • Vibration Prevention Devices (AREA)
  • Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)

Abstract

Mechanism for connecting a bush for railway vehicle axles (12) to the frame (10) of a railway vehicle bogie comprising a longitudinal push rod (14) having one end (16) connected to the bush (12) and its opposite end (18) connected to the frame of the bogie, with the interposition of respective elastic members comprising at the connection to the bogie frame, rubber sleeves (40). Supplementary resilient means (58) are disposed in series with the said rubber sleeves so as to increase the transverse elasticity of the connection when the transverse forces applied to the said sleeves exceed a pre determined threshold value.

Description

  • The present invention relates generally to the connection of the axle box of a wheel-set to the frame of a bogie of a railway vehicle, for example, a locomotive.
  • More particularly, the invention relates to a connection mechanism of the type comprising a longitudinal push rod having one end connected to the axle box and the opposite end connected to the frame of the bogie with the interposition of respective elastic members formed by rubber sleeves designed to allow the axle box free displacements in the vertical plane and limited displacements in the transverse and longitudinal directions (as disclosed in the DE-A-2 735 574).
  • The object of the present invention is to provide a mechanism of the type specified above which allows the optimisation of the transverse resilience of the connection between the axle box and the frame of the bogie, with a stabilising effect.
  • According to the invention, this object is achieved by the fact that a connecting mechanism of the type defined at the beginning further comprises supplementary resilient means disposed in series with the rubber sleeves associated with the end of the push rod connected to the frame of the bogie and acting so as to increase the transverse elasticity of the said connection when the transverse forces applied to the axle box exceed a predetermined threshold value.
  • Thanks to this characteristic it is possible to impart to the resilient connection between the axle box and frame of the bogie the necessary relatively high rigidity in the case of transverse forces of limited magnitude, whilst ensuring that the said rigidity is appreciably less for transverse loads above the said predetermined threshold value, corresponding in practice to the loading of the supplementary resilient means. The result is a perceptible improvement in the travelling stability of the bogie and in its ability to adapt to line irregularities.
  • According to a preferred embodiment of the invention two sleeves of elastomeric material are provided between the frame of the bogie and the corresponding end of the push rod, the sleeves being axially spaced, and the said supplementary resilient means consist of a helical compression spring interposed coaxially between the two rubber sleeves, the ends of said spring reaction against respective abutments which can approach each other axially, and which bear against the two rubber sleeves.
  • Alternatively the additional resilient means may comprise cup springs or their equivalent.
  • The invention will now be described in detail with reference to the accompanying drawings, supplied purely by way of non-limiting example, in which:
    • Figure 1 is a diagrammatic longitudinal sectional view of a connecting mechanism according to the invention, shown in its undeformed rest condition, and
    • Figure 2 shows a part of Figure 1 in its deformed condition under heavy loading.
  • Referring initially to Figure 1, there is indicated diagrammatically at 10 a part of the frame of a railway vehicle bogie, for example of a locomotive, and at 12 one part of an axle box for railway axles connected to the frame 10 by a connecting rod or a longitudinal push rod 14.
  • The connecting rod 14 has at one end a tubular part 16 of small axial length which serves for connection to the axle box 12 and at the opposite end, a tubular part 18 of greater length for connection to the frame 10.
  • The tubular part 16 is traversed axially by a connecting pin 20 which has prismatic ends 20a engaged in corresponding holes 22 in the axle box 12, and a central cylindrical part 24 connected to the tubular part 16 of the connecting rod 14 through a rubber sleeve 26.
  • Between the end faces of the tubular part 16 and the surfaces of axle box 12 which face it, there are interposed two further rubber elements 28.
  • The other tubular part 18 of the connecting rod 14 is traversed by a connecting pin 30 which has a central cylindrical part 32, two cylindrical end parts 34 of smaller diameter and two prismatic terminal parts 36 engaged in corresponding holes 38 in the frame 10.
  • Two sleeves 40 are interposed between the cylindrical parts 34 of the pin 30 and the tubular part 18 of the connecting rod 14, each sleeve 40 including an inner metal ring 42, an inner ring 44 of elastomeric material, an intermediate metal ring 46, an outer ring 48 of elastomeric material and an outer metal ring 50.
  • The inner metal rings 42 are keyed to two bushes 52 adjacent the surfaces of the cylindrical end parts 34 of the pin 30, the bushes 52 having respective external annular stop flanges 54 at their adjacent axial ends.
  • The outer metal rings 50 of the two sleeves 40, on the other hand, are keyed to a bush 56 adjacent the inner wall of the tubular part 18 of the rod 14.
  • The central part 32 of the pin 30 is surrounded by a helical compression spring 58 the ends of which react against a pair of abutment rings 60 slidable axially along the bush 56. Each abutment ring 60 has an external annular axially projecting lip 62 against which the outer metal ring 50 of a respective sleeve 40 abuts, and a radially inwardly projecting flange 64 which cooperates with the annular flange 54 of the corresponding bush 52.
  • In operation, the normal longitudinal and transverse movements of the axle box 12 in relation to the frame 10 of the bogie are made possible by elastic deformations of the rubber elements 26, 28 and by radial deformations of the sleeves 40.
  • When the magnitude of the transverse forces applied to the sleeves 40 exceeds a predetermined threshold value, then the flexibility of the resilient connection between the frame 10 and the rod 14 and hence the axle box 12, is increased as a result of the compression-deformation of the helical spring 58, due to the abutment rings 60 approaching each other axially in the manner illustrated in Figure 2.
  • Naturally, details of construction and forms of embodiment of the invention may be varied widely from what has been described and illustrated with reference to the example. More particularly the helical spring 58 could be replaced by equivalent resilient members, for example, cup springs.

Claims (2)

1. Mechanism for connecting an axle box (12) of a wheel-set to the frame (10) of a bogie of a railway vehicle, comprising a longitudinal push rod (14) having one end (16) connected to the axle box (12) and the opposite end (18) connected to the bogie frame (10) with the interposition of respective elastic members formed by rubber sleeves (26, 40) designed to allow the axle box free displacements in the vertical plane and limited displacements in the longitudinal and transverse directions, characterised in that the mechanism further comprises supplementary resilient means (58) disposed in series with the rubber sleeves (40) associated with the end (18) of the push rod (14) connected to the bogie frame (10) and acting so as to increase the transverse elasticity of the said connection when the transverse forces applied to the said sleeve (40) exceed a predetermined threshold value.
2. Mechanism according to Claim 1, characterised in that the axially spaced apart sleeves (40) are interposed between the bogie frame (10) and the corresponding end (18) of the push rod (14) and in that the said supplementary resilient means comprise a compression spring (58) interposed coaxially between the two sleeves (40) and the ends of which react against respective abutments (6) which can approach each other axially, and which bear against the said two sleeves (40).
EP84830185A 1983-07-19 1984-06-20 Mechanism for connecting a bush for railway axles to the frame of a bogie of a railway vehicle Expired EP0132235B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84830185T ATE45317T1 (en) 1983-07-19 1984-06-20 DEVICE FOR FIXING WHEEL AXLE BUSHINGS ON RAILWAY VEHICLE BODY FRAME.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT6777783 1983-07-19
IT67777/83A IT1162914B (en) 1983-07-19 1983-07-19 DEVICE TO CONNECT A BUSHING FOR RAILWAY AXLES TO THE FRAME OF A TROLLEY OF A RAILWAY VEHICLE

Publications (3)

Publication Number Publication Date
EP0132235A2 EP0132235A2 (en) 1985-01-23
EP0132235A3 EP0132235A3 (en) 1987-04-08
EP0132235B1 true EP0132235B1 (en) 1989-08-09

Family

ID=11305213

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84830185A Expired EP0132235B1 (en) 1983-07-19 1984-06-20 Mechanism for connecting a bush for railway axles to the frame of a bogie of a railway vehicle

Country Status (4)

Country Link
EP (1) EP0132235B1 (en)
AT (1) ATE45317T1 (en)
DE (1) DE3479306D1 (en)
IT (1) IT1162914B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH671930A5 (en) * 1986-07-31 1989-10-13 Sig Schweiz Industrieges
DE4141463A1 (en) * 1991-12-12 1993-06-17 Aeg Schienenfahrzeuge Wheel set guide for rail vehicles with bogies - has wheel set bearing housing with extension guide arm, and elastic guide bearing between arm and bogie beam

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL202511A (en) * 1960-03-18 1900-01-01
DE2735574C3 (en) * 1977-08-06 1980-07-31 Krauss-Maffei Ag, 8000 Muenchen Attachment for wheel set control arms of rail vehicles

Also Published As

Publication number Publication date
ATE45317T1 (en) 1989-08-15
DE3479306D1 (en) 1989-09-14
IT1162914B (en) 1987-04-01
IT8367777A0 (en) 1983-07-19
EP0132235A2 (en) 1985-01-23
EP0132235A3 (en) 1987-04-08

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