GB2086330A - Railway car bogie - Google Patents
Railway car bogie Download PDFInfo
- Publication number
- GB2086330A GB2086330A GB8131557A GB8131557A GB2086330A GB 2086330 A GB2086330 A GB 2086330A GB 8131557 A GB8131557 A GB 8131557A GB 8131557 A GB8131557 A GB 8131557A GB 2086330 A GB2086330 A GB 2086330A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bolster
- friction
- friction shoe
- sloped
- vertical
- 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
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
- B61F5/02—Arrangements permitting limited transverse relative movements between vehicle underframe or bolster and bogie; Connections between underframes and bogies
- B61F5/04—Bolster supports or mountings
- B61F5/12—Bolster supports or mountings incorporating dampers
- B61F5/122—Bolster supports or mountings incorporating dampers with friction surfaces
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Train Traffic Observation, Control, And Security (AREA)
- Braking Arrangements (AREA)
Abstract
Side frames 10 support a resiliently mounted bolster 16 which is restrained or snubbed from excess oscillating movements by friction shoes 26 located in wedge- shaped pockets in each side frame 10. Each friction shoe 26 is provided with a recess 48 which visually indicates the combined wear of various friction surfaces by appearing above the top wall 38 of the bolster. <IMAGE>
Description
SPClFlCATl0N Failvvev car bogie
This invention relates in general to frictionally snubbed railway car trucks, i.e. bogies, and more particularly to a friction shoe located between the bolster and the side frame of the bogie and adapted to indicate the combined wear of various control surfaces.
The use of friction shoes as snubbing devices to control the oscillating movements of the bolster in the side frame is known. Arrangements for using such friction shoes are shown in U.S. Patent Nos.
2,953,995 and 4,189,585.
The type of railway car bogie to which the present invention is generally related comprises spaced side frame members each having an opening arranged to resiliently support opposite ends of a bolster. The bolster and side frame form two wedge-shaped openings at either end of the bolster. A spring biased friction shoe is provided in each wedge-shaped opening. The friction shoe frictionally engages both the side frame and the bolster for controlling the oscillating movement of the bolster.
Satisfactory results are obtained in limiting the oscillating motion of the bolster only as long as the friction parts are not ailowed to develop excessive wear. Such a condition will cause the biasing springs to exert a force which is out of tolerance and rills becomes ineffective in dampening bolster oscillations.
An indicating arrangement for determining when the friction shoes themselves have developed excessive wear is shown in U.S. Patent
No. 3 803 707. In that arrangement a wear indicator hole is provided in the bolster. The wear indicator hole enables a viewer to compare the position of the friction shoe to a previously established reference. The relative position of the friction shoe enables the viewer to determine the wear remaining in the friction shoe. However the indicator hole is in a rather difficult to view location and becomes hidden if a certain limit of wear is exceeded.
It is therefore an object of the present invention to provide an easy to view indication of the combined wear of the various friction contact surfaces in a railway bogie.
Accordingly, the invention provides a railway car bogie including a bolster resiliently supported in side frames between spaced substantially vertical columns thereof, said bolster having sloped surfaces on both sides theraof, two friction shoes each having a sloped face and a substantially vertical face being respectively interposed between each bolster sloped surface and vertical column, there being control springs for urging the friction shoes into frictional engagement with the bolster sloped surfaces and the vertical volumes, wherein the substantially vertical face of the friction shoe includes a recessed indicating portion which is below the bolster when the friction shoe is within acceptable wear conditions and which extends above the bolster so as to be always visible when the substantially vertical and sloped faces of the friction shoe become worn to such an extent that repairs are indicated.
A preferred embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings in which:
Figure 1 is a fragmentary side elevational view of part of a railway car bogie in accordance with the present invention;
Figure 2 is a detailed fragmentary side elevational view of a railway car bogie bolster and friction shoes;
Figure 3 is a fragmentary side elevational view of the railway car bogie bolster, side frame and friction shoes;
Figure 4 is a detailed side elevational view of the side frame column, bolster and friction shoe, with the shoe indicator in an unworn position;
Figure 5 is a detailed side elevational view of the side frame column, bolster and friction shoe, with the shoe indicator in a worn position.
Referring now to Figure 1 of the drawings, there is shown a side frame 10 having a pair of columns 12 defining the side of a bolster opening 1 4 formed in the frame. One end of a bolster 1 6 is resiliently supported in the bolster opening 14 on outer load springs 11 and inner load springs 1 3.
Friction plates 20 may be integral with or suitably mounted on side frame columns 1 2.
As best seen in Figures 2 and 3, friction shoes 24 comprise a body portion 26 having a friction wall 28 which frictionally engages a friction surface 30 on side frame column friction plate 20.
Friction shoe 24 is urged into frictional
engagement with plate 20 by control spring 23.
Control spring 23 is received in a central spring
pocket formed in friction shoe 24 and is
compressed between a lower wall 36 of bolster 1 6 and an upper wall 39 of friction shoe 24. The
spring urges an upper surface 40 of sloped wings
42, which project outwardly from opposite sides
of body portion 26 of friction shoe 24, into
engagement with a guiding surface 44 of
bolster 16.
As best seen in Figures 4 and 5, friction wall 28
of friction shoe 26 is modified such that an
indicating recess or indentation 48 is present.
Such recess would most commonly be formed in
the friction shoe during the casting operation. A
normal or unworn friction shoe and adjacent
friction surfaces are shown in Figure 4. Note that
the indicating recess 48 is below top wall 38 of
the bolster 16. However, as friction shoe 24 and
adjacent friction surfaces are worn by the
oscillating motion of bolster 1 6 in side frame 10
during operation, the friction surfaces will become
worn. Accordingly, as shown in Figure 5, friction
shoe 24 will rise due to the worn surfaces and
indicating recess 48 will become visible above top
wall 38 of bolster 1 6. The length of indicating
recess 48 will be such that when the recess is
entirely visible above bolster 16, corrective
maintenance or replacement of friction shoe 24 or other friction surfaces should be undertaken.
Thus, indicating means are provided which readily show an inspector when corrective maintenance of the friction dampening mechanism of the railway car bogie should be undertaken.
Claims (3)
1. A railway car bogie including a bolster resiliently supported in side frames between spaced substantially vertical columns thereof, said bolster having sloped surfaces on both sides thereof, two friction shoes each having a sloped face and a substantially vertical face being respectively interposed between each bolster sloped surface and vertical column, there being control springs for urging the friction shoes into frictional engagement with the bolster sloped surfaces and the vertical columns, wherein the substantially vertical face of the friction shoe includes a recessed indicating portion which is below the bolster when the friction shoe is within acceptable wear conditions and which extends above the bolster so as to be always visible when the substantially vertical and sloped faces of the friction shoe become worn to such an extent that repairs are indicated.
2. A railway car bogie as claimed in claim 1 wherein said side frame substantially vertical columns partially define a bolster opening and said bolster is resiliently supported in said openings on spring groups for vertical movement therein, said bolster having top and bottom walls, each said column including a vertical planar surface, and the friction shoes each include a spring pocket, the control springs being located in said spring pockets and being adapted to urge each said friction shoe vertical face into frictional contact with a vertical column planar surface and each said friction shoe sloped face into frictional contact with a said sloped surface on said bolster, and each said friction shoe recessed indicating portion comprises a notch which is below the top wall of said bolster when said friction shoe is within acceptable wear conditions and which extends above said top wall of said bolster so as to be always visible when repairs are indicated.
3. A railway car bogie substantially as herein described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US19866180A | 1980-10-20 | 1980-10-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2086330A true GB2086330A (en) | 1982-05-12 |
| GB2086330B GB2086330B (en) | 1984-06-20 |
Family
ID=22734277
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB8131557A Expired GB2086330B (en) | 1980-10-20 | 1981-10-20 | Railway car bogie |
Country Status (13)
| Country | Link |
|---|---|
| JP (1) | JPS5795249A (en) |
| KR (1) | KR850001825B1 (en) |
| AR (1) | AR230029A1 (en) |
| BE (1) | BE890780A (en) |
| BR (1) | BR8106711A (en) |
| CA (1) | CA1178122A (en) |
| ES (1) | ES506342A0 (en) |
| GB (1) | GB2086330B (en) |
| IN (1) | IN153749B (en) |
| MX (1) | MX154464A (en) |
| PT (1) | PT73809B (en) |
| ZA (1) | ZA817237B (en) |
| ZW (1) | ZW24781A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104043785A (en) * | 2013-03-14 | 2014-09-17 | 尼维斯工业有限公司 | Splice wedge and manufacture method thereof |
| WO2014143099A1 (en) * | 2012-10-17 | 2014-09-18 | Nevis Industries Llc | Split wedge and method for making same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USD754323S1 (en) | 2014-02-17 | 2016-04-19 | 3M Innovative Properties Company | Hearing device retainer |
| USD754324S1 (en) | 2014-02-17 | 2016-04-19 | 3M Innovative Properties Company | Hearing device retainer |
| USD733865S1 (en) | 2014-02-17 | 2015-07-07 | 3M Innovative Properties Company | Earplug switch |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3805707A (en) * | 1972-07-18 | 1974-04-23 | Amsted Ind Inc | Railway truck snubbing indication arrangement |
-
1981
- 1981-10-02 CA CA000387188A patent/CA1178122A/en not_active Expired
- 1981-10-12 ZW ZW247/81A patent/ZW24781A1/en unknown
- 1981-10-12 AR AR287069A patent/AR230029A1/en active
- 1981-10-13 PT PT73809A patent/PT73809B/en not_active IP Right Cessation
- 1981-10-17 KR KR1019810003925A patent/KR850001825B1/en active Pre-grant Review Request
- 1981-10-19 ES ES506342A patent/ES506342A0/en active Granted
- 1981-10-19 BE BE0/206280A patent/BE890780A/en not_active IP Right Cessation
- 1981-10-19 JP JP56165860A patent/JPS5795249A/en active Pending
- 1981-10-19 BR BR8106711A patent/BR8106711A/en unknown
- 1981-10-20 GB GB8131557A patent/GB2086330B/en not_active Expired
- 1981-10-20 ZA ZA817237A patent/ZA817237B/en unknown
- 1981-10-20 IN IN1156/CAL/81A patent/IN153749B/en unknown
- 1981-10-20 MX MX189723A patent/MX154464A/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014143099A1 (en) * | 2012-10-17 | 2014-09-18 | Nevis Industries Llc | Split wedge and method for making same |
| CN104043785A (en) * | 2013-03-14 | 2014-09-17 | 尼维斯工业有限公司 | Splice wedge and manufacture method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| ZW24781A1 (en) | 1982-03-17 |
| ES8301791A1 (en) | 1982-12-16 |
| KR830007340A (en) | 1983-10-19 |
| CA1178122A (en) | 1984-11-20 |
| PT73809B (en) | 1983-05-16 |
| BE890780A (en) | 1982-04-19 |
| PT73809A (en) | 1981-11-01 |
| BR8106711A (en) | 1982-07-06 |
| GB2086330B (en) | 1984-06-20 |
| MX154464A (en) | 1987-08-28 |
| ES506342A0 (en) | 1982-12-16 |
| AR230029A1 (en) | 1984-02-29 |
| JPS5795249A (en) | 1982-06-14 |
| ZA817237B (en) | 1982-09-29 |
| IN153749B (en) | 1984-08-18 |
| KR850001825B1 (en) | 1985-12-26 |
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| NZ198643A (en) | Wear indication for railway bogey friction snubber:notch cut in friction surface | |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 19981020 |