GB2257770A - Shock absorber for a coupling - Google Patents
Shock absorber for a coupling Download PDFInfo
- Publication number
- GB2257770A GB2257770A GB9214870A GB9214870A GB2257770A GB 2257770 A GB2257770 A GB 2257770A GB 9214870 A GB9214870 A GB 9214870A GB 9214870 A GB9214870 A GB 9214870A GB 2257770 A GB2257770 A GB 2257770A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rod
- coupling
- rod portion
- shear plate
- bushing
- 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- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
- B61G7/00—Details or accessories
- B61G7/14—Safety devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
- B61G11/00—Buffers
- B61G11/16—Buffers absorbing shocks by permanent deformation of buffer element
Abstract
A coupling rod 1 of a short coupling comprises two rod portions 2, 3 and a shear plate 5 via which the two rod portions 2, 3 are firmly joined together. If the coupling is subjected to an excessive shock the shear plate 5 is sheared at a predetermined breaking point 16 and the two rod portions 2, 3 are pushed telescopically one inside the other until they reach a fixed stop 14, 15. This not only avoids damage to springs in the coupling but provides a visible indication when damage has occurred. <IMAGE>
Description
SHOCK ABSORBER FOR A COUPLING
The invention relates to a device for absorbing excessive shocks in a coupling, in particular a coupling for rail vehicles by means of a coupling rod.
In short couplings of rail vehicles it is known to transfer tensile and compressive forces by means of stacks of springs. When excessive shocks occur these springs or other coupling parts are damaged, but this damage for the most part is not obvious owing to the enclosed assembly.
It is the aim of the present invention to produce a device of the type mentioned above-which preferentially absorbs excessive shocks to protect the other coupling parts and indicates them visibly.
According to the invention this aim is achieved by a device for absorbing excessive shocks in a coupling, including two rod portions forming a coupling rod and a shear plate joining the two rod portions in such a way that, upon application of a predetermined minimum force to the rod, the plate shears and allows relative longitudinal movement of the rod portions.
By making the coupling rod in two telescoping parts with a shear plate between them a predetermined breaking point is produced which prevents overstressing of the other coupling parts in the case of excessive shocks.
An embodiment of the invention is illustrated by way of example in the enclosed drawing and is described below.
The single Figure shows a longitudinal section of a coupling rod of a short coupling for rail vehicles.
The coupling rod 1 has a first rod portion 2 jointedly suspended on the rail vehicle, and a second rod portion 3 provided with a coupling part 4. Both rod portions are generally hollow and the first portion 2 fits inside the second 3. The two rod parts 2 and 3 are joined together via a shear plate 5 which acts as a predetermined break point when excessive shocks occur.
The shear plate 5 is arranged with its inner circumference centred on the front end of the first rod portion 2 and is firmly clamped between this rod end -and a bushing 6 by means of bolts 7. The bushing 6 is effectively a continuation of the rod portion 2 and is arranged with its outer circumference 8 centred on the inner circumference 9 of the second, tubular rod portion 3.
The outer circumference of the shear plate 5 is flush with the end of the second rod portion 3 and is firmly clamped between this and a stop bushing 10 by means of bolts 11. The bushing 10 likewise represents a continuation of the second rod portion 3.
The end of the first rod portion 2 is in fact formed by an intermediate ring 17 which has the same inner diameter as the rod 2 but a larger outer diameter, corresponding to that of the bushing 6; the ring 17 is in this embodiment a separate part held on by the bolts 7, though separate fixing means are conceivable and the ring could be integral with the rod portion 2 if assembly conditions allowed. The annular step 18 formed by the ring 17 is matched by a corresponding internal annular step 19 on the stop bushing 10, as can be seen in the Figure. This construction prevents the assembled rod from separating under tensile load, but it should be noted that the shear plate 5 is not stressed under tensile load in this embodiment.
The stop bushing 10 has a ring portion or annular extension 13 centred on the outer circumference 12 of the first rod portion 2 outwardly of the step 19, and the radially extending face 15 of this ring portion 13 together with a shoulder 14 arranged at a distance from the end of the rod portion 2 forms a fixed stop.
In operation, when an excessive shock occurs in the longitudinal direction of the rod, the shear plate 5 is split by shearing at the predetermined break point 16, and the two rod portions 2, 3 are pushed telescopically one inside the other until the face 15 reaches the shoulder 14. The rod portions 2, 3 are guided by the bushing 6 and the stop bushing 10 respectively in a straight line with respect to each other. Other forms of guiding could be contemplated if the rod portions were parallel to each other instead of concentric, for example.
The length of the movement path, determined by the initial spacing of the stops 14, 15, depends on the structural length of the short coupling or on the type of rail vehicles.
Through the arrangement of the shear plate 5 with the predetermined break point 16 overloading of the stacks of springs arranged in the first rod portion 2 is avoided, since the shear plate breaks in a sacrificial manner, absorbing the energy of the impact; a tight fit of the two rods may contribute further to the absorption of energy. In addition the compression of the composite coupling rod is easily visible from outside and hence replacement can be carried out straight away before the springs are damaged.
Although the embodiment described relates to a coupling which absorbs a compressive shock it is clear that it could be so constituted as to absorb a tensile shock, for instance by including two rod portions which slide apart on rupture of a shear plate. Also, while the rods shown have a generally circular cross-section it is evident that other cross-sections are feasible, although for a telescopic arrangement the relevant sections must of course be uniform.
Claims (9)
1. Device for absorbing excessive shocks in a coupling, including two rod portions forming a coupling rod and a shear plate joining the two rod portions in such a way that, upon application of a predetermined minimum force to the rod, the plate shears and allows relative longitudinal movement of the rod portions.
2. Device according to claim 1, characterised in which after shearing the two rod portions can be pushed telescopically one inside the other until they reach a fixed stop.
3. Device according to claim 2, in which the fixed stop includes a collar on the outer circumference of the inner portion for abutment with the end of the outer rod portion.
4. Device according to claim 3, in which the end of the outer rod portion has a stop bushing which can slide on the outer circumference of the inner rod portion up to the collar.
5. Device according to claim 4, in which the shear plate is firmly clamped between the end of the second rod portion and the stop bushing by means of bolts.
6. Device according to any of claims 2 to 5, in which the end of the inner rod portion has a bushing which can slide on the inner circumference of the outer rod portion.
7. Device according to claim 6, in which the shear plate is firmly clamped between the end of the first rod portion and its bushing by means of bolts.
8. A shock-absorbing device substantially as described herein with reference to the accompanying drawing.
9. A coupling for rail vehicles with a coupling rod suspended jointedly on the vehicle and having a coupling portion at the other end, including a shockabsorbing device as claimed in any preceding claim.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH211491 | 1991-07-16 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9214870D0 GB9214870D0 (en) | 1992-08-26 |
| GB2257770A true GB2257770A (en) | 1993-01-20 |
Family
ID=4226211
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9214870A Withdrawn GB2257770A (en) | 1991-07-16 | 1992-07-13 | Shock absorber for a coupling |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2257770A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0802100A1 (en) * | 1996-04-19 | 1997-10-22 | De Dietrich Ferroviaire | Railway vehicle with a driverscompartment having an energy absorbing structure with progressive deformation |
| WO2008073704A2 (en) * | 2006-12-08 | 2008-06-19 | Wabtec Holding Corp. | Fatigue-resistant emergency release device for rail transit vehicle coupler |
| EP2295305A1 (en) * | 2009-09-15 | 2011-03-16 | Voith Patent GmbH | Energy consumption device, in particular in the form of impact protection for a rail-led vehicle |
| CN103786741A (en) * | 2012-10-30 | 2014-05-14 | 南车青岛四方机车车辆股份有限公司 | Anti-creeping energy absorption device for railway vehicle |
| EP2840009A1 (en) * | 2012-04-17 | 2015-02-25 | Qingdao Sri Technology Co., Ltd. | Compact buffer having overload protection |
| CN105172827A (en) * | 2015-08-27 | 2015-12-23 | 青岛四方车辆研究所有限公司 | Car coupler rear-mounted type crushing pipe with limiting device |
| WO2016000601A1 (en) * | 2014-06-30 | 2016-01-07 | 常州南车铁马科技实业有限公司 | Coupler buffer connector for rail vehicle and buffer connecting system using same |
| CN105644580A (en) * | 2015-12-29 | 2016-06-08 | 中车戚墅堰机车车辆工艺研究所有限公司 | Crushing device, assembling method thereof and coupler buffer system comprising crushing device |
| WO2016139236A1 (en) * | 2015-03-05 | 2016-09-09 | Bombardier Transportation Gmbh | Swivel joint for swivel-joint connecting of rail vehicles |
| CN110539773A (en) * | 2018-06-25 | 2019-12-06 | 中车长春轨道客车股份有限公司 | collision interface energy absorption device and rail train |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1021646A (en) * | 1961-10-10 | 1966-03-09 | Egon Stein | Improvements relating to buffer mechanisms |
-
1992
- 1992-07-13 GB GB9214870A patent/GB2257770A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1021646A (en) * | 1961-10-10 | 1966-03-09 | Egon Stein | Improvements relating to buffer mechanisms |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0802100A1 (en) * | 1996-04-19 | 1997-10-22 | De Dietrich Ferroviaire | Railway vehicle with a driverscompartment having an energy absorbing structure with progressive deformation |
| FR2747633A1 (en) * | 1996-04-19 | 1997-10-24 | Alstom Ddf | DRIVING CABIN RAIL VEHICLE HAVING ENERGY ABSORBING STRUCTURE WITH PROGRESSIVE DEFORMATION |
| WO2008073704A2 (en) * | 2006-12-08 | 2008-06-19 | Wabtec Holding Corp. | Fatigue-resistant emergency release device for rail transit vehicle coupler |
| WO2008073704A3 (en) * | 2006-12-08 | 2009-01-22 | Wabtec Holding Corp | Fatigue-resistant emergency release device for rail transit vehicle coupler |
| US7766177B2 (en) | 2006-12-08 | 2010-08-03 | Wabtec Holding Corp. | Fatigue-resistant emergency release device for rail transit vehicle coupler |
| EP2295305A1 (en) * | 2009-09-15 | 2011-03-16 | Voith Patent GmbH | Energy consumption device, in particular in the form of impact protection for a rail-led vehicle |
| US8100237B2 (en) | 2009-09-15 | 2012-01-24 | Voith Patent Gmbh | Energy-absorbing device, in particular in the form of a safety device against shock loads for a track-borne vehicle |
| EP2840009A1 (en) * | 2012-04-17 | 2015-02-25 | Qingdao Sri Technology Co., Ltd. | Compact buffer having overload protection |
| EP2840009A4 (en) * | 2012-04-17 | 2015-04-08 | Qingdao Sri Technology Co Ltd | Compact buffer having overload protection |
| CN103786741A (en) * | 2012-10-30 | 2014-05-14 | 南车青岛四方机车车辆股份有限公司 | Anti-creeping energy absorption device for railway vehicle |
| WO2016000601A1 (en) * | 2014-06-30 | 2016-01-07 | 常州南车铁马科技实业有限公司 | Coupler buffer connector for rail vehicle and buffer connecting system using same |
| WO2016139236A1 (en) * | 2015-03-05 | 2016-09-09 | Bombardier Transportation Gmbh | Swivel joint for swivel-joint connecting of rail vehicles |
| CN107428348A (en) * | 2015-03-05 | 2017-12-01 | 庞巴迪运输有限公司 | For by rail vehicle by rotate it is be hinged in a manner of the turning joint that connects |
| CN107428348B (en) * | 2015-03-05 | 2019-03-19 | 庞巴迪运输有限公司 | The turning joint connected for rail vehicle to be rotated to hinged mode |
| CN105172827A (en) * | 2015-08-27 | 2015-12-23 | 青岛四方车辆研究所有限公司 | Car coupler rear-mounted type crushing pipe with limiting device |
| CN105172827B (en) * | 2015-08-27 | 2018-01-30 | 中车青岛四方车辆研究所有限公司 | The rear-mounted conquassation pipe of hitch with stopping means |
| CN105644580A (en) * | 2015-12-29 | 2016-06-08 | 中车戚墅堰机车车辆工艺研究所有限公司 | Crushing device, assembling method thereof and coupler buffer system comprising crushing device |
| CN105644580B (en) * | 2015-12-29 | 2019-01-29 | 中车戚墅堰机车车辆工艺研究所有限公司 | Crushing device, assembling method thereof and coupler buffer system comprising crushing device |
| CN110539773A (en) * | 2018-06-25 | 2019-12-06 | 中车长春轨道客车股份有限公司 | collision interface energy absorption device and rail train |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9214870D0 (en) | 1992-08-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |