EP0011453B1 - Railway wagon suspension units - Google Patents
Railway wagon suspension units Download PDFInfo
- Publication number
- EP0011453B1 EP0011453B1 EP79302517A EP79302517A EP0011453B1 EP 0011453 B1 EP0011453 B1 EP 0011453B1 EP 79302517 A EP79302517 A EP 79302517A EP 79302517 A EP79302517 A EP 79302517A EP 0011453 B1 EP0011453 B1 EP 0011453B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- saddle
- unit according
- suspension unit
- housing
- bonded
- 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
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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
- B61F5/308—Axle-boxes mounted for movement under spring control in vehicle or bogie underframes incorporating damping devices
-
- 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
- B61F5/38—Arrangements or devices for adjusting or allowing self- adjustment of wheel axles or bogies when rounding curves, e.g. sliding axles, swinging axles
Definitions
- This invention relates to railway wagon suspension units; such units may be used separately in conjunction with each wheel of a single axle two-wheel assembly, i.e. a pedestal, or embodied in side frames in a composite bogie structure, e.g. a four-wheel two axle or six-wheel three axle bogie.
- a railway wagon suspension unit comprising a frame mounted over a saddle accommodating an axle-journal housing, with a load spring suspension system disposed between the frame and the saddle, the saddle bearing on the housing through a mounting adaptor including a curvilinear surface engaging a further surface whereby to permit pivotal lateral motion of the saddle and the housing relative to one another.
- a unit is the subject of GB-A-1 433948.
- the present invention mitigates this drawback by providing in the mounting firstly a body of elastomeric material. With this arrangement there is permitted a controlled degree of movement particularly in respect of the longitudinal motion of the kind referred to where the elastomer now yields to shear stress. Whereas this principle has been adopted in certain cases hitherto, namely, as disclosed in GB-A-1025808 and GB-A-1 532441 and US-A-3638582, in this invention lateral pivotal movement of the kind by which the saddle pivots or swings about the housing mounting adaptor is accommodated whilst direct lateral translational movement of the saddle relative to the adaptor is restrained.
- a railway wagon pedestal unit comprising a frame 1 mounted over a saddle 2 accommodating an axle-journal housing 3.
- the saddle embodies a platform having a fore-section 4 and an aft section 5.
- Mounted on these sections are spring nests 6, 7 respectively engaging friction wedges, only one pair of which 8, 9 is visible.
- the wedge 8 bears on a friction pad 10 on the side of the saddle and a pad 11 on the inclined under-surface of the wedge 9, which wedge itself nestles in a right angled recess 12 formed in the frame 1.
- the spring nests comprise a combination of springs having different rates which together effect three stage springing.
- the journal housing accommodates a wheel axle 13 in roller bearings 14.
- an 'adaptor' 15 comprising a cast member 16 having a recess in its upper surface accommodating an elastomeric body, more particularly a rubber block 17, which is bonded to an upper plate 18 carrying an elongated rib 19.
- the rib 19 has a curved surface on which bears an inversely curved elongated channel member 20 which is mounted on the underside of the saddle aperture.
- Two studs 21, 22 extend from the top of the saddle casting into slots, only one of which (23) is visible, in the pedestal frame 1. This ensures retention of the saddle within the pedestal unit should the latter be lifted.
- a curved clip member 24 is located on the bottom of the saddle aperture to prevent the journal housing from becoming detached from this aperture and a pair of 'stop' blocks 25 are welded to the sides of the saddle to limit relative longitudinal motion between the journal housing adaptor and the saddle.
- the rubber block 17 is shearing longitudinally up to and during the stage at which the wedges start to move, limited only by the casting 16 abutting the stop block 25.
- FIGS 3 and 4 Alternative forms of mounting are shown in Figures 3 and 4, both designed to eliminate lateral clearance.
- the rubber block (26) is bounded to upper and lower plates 27, 28, the upper plate 27 additionally being spigotted at 29 to the elongated metal rib 19, the whole defining a 'flared' U-shaped configuration.
- Figure 4 the design is similar but the lower plate is actually made up of three separate elements including two side plates of which only 28A is visible. The intermediate plate within the rubber mounting is omitted.
- the pedestal unit described may be manufactured as shown complete with the rocker assembly or the latter may be separately incorporated in 'converted' units, i.e. existing units which have been machined to accommodate the rocker assembly conversion.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Springs (AREA)
- Vibration Prevention Devices (AREA)
- Axle Suspensions And Sidecars For Cycles (AREA)
Description
- This invention relates to railway wagon suspension units; such units may be used separately in conjunction with each wheel of a single axle two-wheel assembly, i.e. a pedestal, or embodied in side frames in a composite bogie structure, e.g. a four-wheel two axle or six-wheel three axle bogie.
- It is known to provide a railway wagon suspension unit comprising a frame mounted over a saddle accommodating an axle-journal housing, with a load spring suspension system disposed between the frame and the saddle, the saddle bearing on the housing through a mounting adaptor including a curvilinear surface engaging a further surface whereby to permit pivotal lateral motion of the saddle and the housing relative to one another. Such a unit is the subject of GB-A-1 433948. With such an arrangement longitudinal motion between the axle-journal housing and the saddle, principally manifested when negotiating curves, has tended to be accommodated in a comparatively disjointed, somewhat stepwise fashion by movement of the customary wedges in the suspension system, adversely affecting the ride, particularly at slow speeds, and promoting wear.
- The present invention mitigates this drawback by providing in the mounting firstly a body of elastomeric material. With this arrangement there is permitted a controlled degree of movement particularly in respect of the longitudinal motion of the kind referred to where the elastomer now yields to shear stress. Whereas this principle has been adopted in certain cases hitherto, namely, as disclosed in GB-A-1025808 and GB-A-1 532441 and US-A-3638582, in this invention lateral pivotal movement of the kind by which the saddle pivots or swings about the housing mounting adaptor is accommodated whilst direct lateral translational movement of the saddle relative to the adaptor is restrained.
- More particularly, as distinct from more conventional pedestal designs hitherto, there is a larger degree of clearance for longitudinal movement between the axle-journal housing/adaptor and the saddle walls so as to accommodate such movement when the elastomeric body is subjected to shear stress. With this invention, such longitudinal movement which, as mentioned, is principally manifested when negotiating curves, is wholly accommodated by the elastomer up to a load rate equal to that at which the friction on the wedges in the load spring suspension system is overcome. The principal advantage of the introduction of this elastomeric mounting is that the axle is permitted to self steer into tight curves at low speed whilst retaining satisfactory high speed performance; this enables a higher mileage to be obtained between tyre turning, i.e. re-furbishing worn tyres on the wheels.
- In order that the invention may be fully understood some embodiments thereof will now be described with reference to the accompanying drawings in which,
- Figure 1 is a part sectional side elevation of a pedestal unit in accordance with this invention.
- Figure 2 is a part sectional end elevation through the wheel axle.
- Figure 3 is one modified form of elastomeric mounting, and
- Figure 4 is another modified form of mounting.
- Referring now to Figures 1 and 2 in the drawings there is shown a railway wagon pedestal unit comprising a
frame 1 mounted over asaddle 2 accommodating an axle-journal housing 3. The saddle embodies a platform having a fore-section 4 and an aft section 5. Mounted on these sections arespring nests 6, 7 respectively engaging friction wedges, only one pair of which 8, 9 is visible. - The wedge 8 bears on a
friction pad 10 on the side of the saddle and a pad 11 on the inclined under-surface of thewedge 9, which wedge itself nestles in a rightangled recess 12 formed in theframe 1. - The spring nests comprise a combination of springs having different rates which together effect three stage springing.
- The journal housing accommodates a
wheel axle 13 inroller bearings 14. Surmounting the journal housing is an 'adaptor' 15 comprising acast member 16 having a recess in its upper surface accommodating an elastomeric body, more particularly arubber block 17, which is bonded to anupper plate 18 carrying anelongated rib 19. Therib 19 has a curved surface on which bears an inversely curvedelongated channel member 20 which is mounted on the underside of the saddle aperture. - The channel (20) and rib (19) together with its resilient yaw mounting together form a composite rocker assembly.
- Two
studs pedestal frame 1. This ensures retention of the saddle within the pedestal unit should the latter be lifted. - A
curved clip member 24 is located on the bottom of the saddle aperture to prevent the journal housing from becoming detached from this aperture and a pair of 'stop'blocks 25 are welded to the sides of the saddle to limit relative longitudinal motion between the journal housing adaptor and the saddle. - When the unit is in service the saddle is rocked about this composite rocker assembly imparting lateral shear stresses on the load spring nests-lateral stresses on the rubber block itself are restrained by
plate 18 bearing on the side of thecast member 16. - Longitudinal motion is accommodated by the rubber block up to a certain limiting value beyond which the friction on the wedges in the load spring suspension system is overcome whereby, for motion in the left hand direction in Figure 1 the wedge will move in that direction compressing the load springs 6 and the right hand wedge will likewise move in that direction under the expansive forces of
springs 7. - The
rubber block 17 is shearing longitudinally up to and during the stage at which the wedges start to move, limited only by thecasting 16 abutting thestop block 25. - Vertical loading is accommodated directly by the
load springs sets 6, 7 and the rubber block in compression. It is necessary to select the vertical and longitudinal load rates of the rubber block to be compatible with the vertical suspension spring rates and the desired axle yaw performance at slow speed in tight curves and at high speed on normal track. Typical specific rates selected may be vertical greater than 17860 Kg/cm, longitudinal 3570-7140 Kg/cm, the figure in any one instance being dependent on vehicle characteristics, performance data and track to be negotiated. - Alternative forms of mounting are shown in Figures 3 and 4, both designed to eliminate lateral clearance. In the former case the rubber block (26) is bounded to upper and
lower plates upper plate 27 additionally being spigotted at 29 to theelongated metal rib 19, the whole defining a 'flared' U-shaped configuration. In the other case, Figure 4, the design is similar but the lower plate is actually made up of three separate elements including two side plates of which only 28A is visible. The intermediate plate within the rubber mounting is omitted. - Whilst the lateral stiffness is increased, neither restrict the longitudinal stiffness in any way.
- The pedestal unit described may be manufactured as shown complete with the rocker assembly or the latter may be separately incorporated in 'converted' units, i.e. existing units which have been machined to accommodate the rocker assembly conversion.
- Although this suspension unit has been described with reference to the specific embodiments illustrated, it is to be understood that various modifications may be made without departing from the scope of this invention. For example, other forms of wedge configuration and load spring nests could readily be adopted as indeed could other forms of the elastomeric mounting, e.g. an additional plate could be inserted in the side rubbers in the Fig. 3/Fig. 4 embodiments to increase lateral stiffness. Variable rate springs could be introduced instead of the multi-stage springing shown in the suspension system.
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7844328 | 1978-11-14 | ||
GB4432878 | 1978-11-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0011453A1 EP0011453A1 (en) | 1980-05-28 |
EP0011453B1 true EP0011453B1 (en) | 1983-01-19 |
Family
ID=10501014
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP79302517A Expired EP0011453B1 (en) | 1978-11-14 | 1979-11-09 | Railway wagon suspension units |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0011453B1 (en) |
DE (1) | DE2964558D1 (en) |
DK (1) | DK482579A (en) |
NO (1) | NO147296C (en) |
NZ (1) | NZ192036A (en) |
ZA (1) | ZA795881B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ZA816167B (en) * | 1980-10-14 | 1982-09-29 | Budd Co | Steerable railway truck |
DE10032009A1 (en) * | 2000-07-01 | 2002-01-10 | Daimler Chrysler Ag | Chassis of a rail vehicle |
CN114834496B (en) * | 2022-05-23 | 2023-12-19 | 武汉钢铁有限公司 | External welding bogie of slag axle bearing |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1745320A (en) * | 1928-03-21 | 1930-01-28 | Gen Motors Corp | Journal box and side-frame support |
US2405132A (en) * | 1944-03-10 | 1946-08-06 | Gen Motors Corp | Railroad journal box |
BE538607A (en) * | 1954-06-05 | |||
US3098682A (en) * | 1962-04-13 | 1963-07-23 | Lord Mfg Co | Railway journal bearing |
US3274955A (en) * | 1963-09-03 | 1966-09-27 | Lord Corp | Resilient roller bearing adapter |
US3276395A (en) * | 1964-06-10 | 1966-10-04 | Lord Corp | Resilient roller bearing adapter |
JPS4820724Y1 (en) * | 1965-11-17 | 1973-06-15 | ||
US3638582A (en) * | 1969-12-03 | 1972-02-01 | Buckeye Steel Castings Co | Resilient bearing mounting |
GB1408651A (en) * | 1972-10-12 | 1975-10-01 | British Steel Corp | Railway wagon pedestal unit |
GB1433948A (en) * | 1973-09-19 | 1976-04-28 | British Steel Corp | Railway pedestal/bogie units |
GB1532441A (en) * | 1975-01-04 | 1978-11-15 | Gloucester Railway Carriage | Suspension means for railway vehicles |
US4026217A (en) * | 1975-08-07 | 1977-05-31 | Parsons, Brinckerhoff, Quade & Douglas, Inc. | Self steering railway axles and wheels on track curvatures |
-
1979
- 1979-11-02 ZA ZA00795881A patent/ZA795881B/en unknown
- 1979-11-05 NZ NZ192036A patent/NZ192036A/en unknown
- 1979-11-09 NO NO793625A patent/NO147296C/en unknown
- 1979-11-09 EP EP79302517A patent/EP0011453B1/en not_active Expired
- 1979-11-09 DE DE7979302517T patent/DE2964558D1/en not_active Expired
- 1979-11-14 DK DK482579A patent/DK482579A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
EP0011453A1 (en) | 1980-05-28 |
NO793625L (en) | 1980-05-16 |
NZ192036A (en) | 1983-07-15 |
DK482579A (en) | 1980-05-15 |
DE2964558D1 (en) | 1983-02-24 |
NO147296C (en) | 1983-03-16 |
NO147296B (en) | 1982-12-06 |
ZA795881B (en) | 1980-10-29 |
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