EP4069571A1 - Attelage à vis pour accoupler deux véhicules sur rail - Google Patents

Attelage à vis pour accoupler deux véhicules sur rail

Info

Publication number
EP4069571A1
EP4069571A1 EP20812301.8A EP20812301A EP4069571A1 EP 4069571 A1 EP4069571 A1 EP 4069571A1 EP 20812301 A EP20812301 A EP 20812301A EP 4069571 A1 EP4069571 A1 EP 4069571A1
Authority
EP
European Patent Office
Prior art keywords
threaded rod
ring
coupling
screw
locking ring
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
Application number
EP20812301.8A
Other languages
German (de)
English (en)
Other versions
EP4069571B1 (fr
Inventor
Martin Schüler
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.)
Voith Patent GmbH
Original Assignee
Voith Patent GmbH
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 Voith Patent GmbH filed Critical Voith Patent GmbH
Publication of EP4069571A1 publication Critical patent/EP4069571A1/fr
Application granted granted Critical
Publication of EP4069571B1 publication Critical patent/EP4069571B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
    • B61G1/00—Couplings comprising interengaging parts of different shape or form and having links, bars, pins, shackles, or hooks as coupling means
    • B61G1/22—Couplings comprising interengaging parts of different shape or form and having links, bars, pins, shackles, or hooks as coupling means having screws incorporated in the links for lengthening or shortening the couplings

Definitions

  • the present invention relates to a screw coupling for coupling two rail vehicles, the rail vehicles having draw hooks or other coupling devices into which the screw coupling with its coupling elements can be hooked or inserted in order to couple the two coupling devices to one another.
  • the invention also relates to an unscrewing device for such a screw coupling.
  • Screw couplings are used to couple two rail vehicles to one another, for example with their draw hooks.
  • the screw couplings each have two coupling elements at their two axial ends.
  • a threaded rod also called a spindle, is provided between the coupling elements, onto which the coupling elements are screwed.
  • the coupling elements of the screw couplings generally each have an eyelet that can be pushed over the corresponding draw hook and hooked into it.
  • the present invention can also be used with differently designed screw couplings, for example with transition couplings or mixed-pull couplings, in which the coupling elements can be designed differently from one another, either by having the eyelets of different axial lengths or by using another coupling element instead of an eyelet for connection to a Coupling device is provided on a rail vehicle.
  • the present invention can also be used with screw couplings in which both coupling elements do not have an eyelet, but rather have coupling elements of different design.
  • screw couplings of the generic type have an unscrewing device at each axial end of the threaded rod, onto which a coupling element is screwed.
  • a disk that is welded to the threaded rod and protruding radially beyond the threaded rod is often provided as an anti-unscrewing device, so that this disk blocks the coupling element from being unscrewed beyond the axial end of the threaded rod.
  • Such a design is previously known from GB 1911/11136 A, for example.
  • key ring locks are known as unscrewing locks at the axial end of the threaded rod.
  • a resilient wire ring slotted around its circumference, behind a shim and a ring, is inserted into a groove at the axial end of the threaded rod so that it protrudes radially outward from the groove and thus prevents the screwed-on coupling element from being unscrewed beyond the axial end of the threaded rod blocked.
  • a dowel pin can be knocked out of the corresponding through hole in the threaded rod and a moment acting on the resilient ring pushes it out of the groove.
  • the function of the unscrewing protection is no longer given and the threaded rod can inadvertently be unscrewed from the coupling element, which leads to damage to the threaded rod and can injure operating personnel.
  • the threaded rod has not yet been completely unscrewed from the coupling element, but is screwed into the coupling element with an insufficient number of turns, so that the threaded rod is torn out of the coupling element when the rail vehicles are moving and the vehicles are torn from each other be separated.
  • the document GB 2 014 265 A discloses a manipulation protection device for preventing only an unauthorized angle adjustment of an adjusting element, which forms a stop and is designed as a threaded rod, for a fuel injection pump device.
  • This comprises a one-piece elastic ring element which is not closed in the circumferential direction, which is placed in a groove at the end of the threaded rod and is fixed on the outer circumference via a cap element.
  • the cap element only prevents unauthorized access to the threaded rod and thus an adjustment that takes place as a result, but can rotate relative to this in the circumferential direction.
  • the present invention is based on the object of specifying a screw coupling for coupling two rail vehicles, which has a simple structure and at the same time avoids the disadvantages mentioned at the beginning. Furthermore, an anti-unscrewing device is to be specified for such a screw coupling.
  • the unscrewing device should have a simple structure and Require as little installation space as possible in order to be able to be integrated into existing screw couplings as a retrofit solution.
  • a screw coupling according to the invention for coupling two rail vehicles has a threaded rod which in each case carries a coupling element in the region of its two axial ends.
  • the threaded rod is preferably made in one piece, but in principle a multi-part threaded rod is also possible, the individual sections of which are connected to one another via an intermediate piece into which the threaded rod sections are screwed with the ends facing one another.
  • At least one of the two coupling elements at the two axial ends of the threaded rod is screwed onto an external thread of the threaded rod. Both coupling elements are preferably screwed onto one axial end of the threaded rod.
  • the threaded rod can be rotated in order to vary the distance between the two coupling elements because by turning the threaded rod it is either screwed further into the coupling element or elements or is unscrewed from the coupling element or elements.
  • the rotatability of the threaded rod also includes rotating the coupling element or elements and holding the threaded rod.
  • At least one axial end of the threaded rod in particular each axial end of the threaded rod onto which a coupling element is screwed, has a screw-off lock, the screw-off lock being the coupling element blocked against unscrewing beyond the axial end of the threaded rod.
  • the unscrewing device comprises a groove extending over at least part of the circumference, in particular over the entire circumference of the threaded rod, into which a locking ring protruding radially from the groove is inserted, the locking ring being interrupted at least at one point over its circumference, so that it can be inserted positively into the groove.
  • a retaining ring which is closed over its circumference and completely surrounds the retaining ring, is arranged radially outside on the retaining ring.
  • the retaining ring prevents the retaining ring from expanding in the radial direction after it has been inserted into the groove at the axial end of the threaded rod. Therefore, the locking ring can no longer slide out of the groove. At the same time, it is not necessary to weld the locking ring to the threaded rod, so that a corresponding heat input into the threaded rod is avoided.
  • the locking ring is freely inserted into the groove, that is to say without a material connection with the threaded rod.
  • the securing ring could be attached to the threaded rod by other material-locking measures, for example by gluing. If a large amount of heat can be avoided, simple welding or tacking can even be considered in order to facilitate assembly.
  • An unscrewing device for such a screw coupling accordingly has a securing ring interrupted at least at one point over its circumference and a securing ring which can be positioned or arranged radially outside on the securing ring and is closed over its circumference Retaining ring which, when placed on the locking ring, completely encloses it.
  • the retaining ring can be materially connected to the securing ring and is, in particular, welded to it. Additionally or alternatively, for example, shrinking the retaining ring onto the retaining ring is also possible. Other form-fitting or material fastenings are possible.
  • the locking ring is preferably free of a material connection to the threaded rod.
  • the retaining ring is in particular an annular element, i.e. an element with at least one outer surface extending around an axis in the circumferential direction and pointing in the radial direction. This is formed by a surface of any contour that revolves around this axis with a constant radius.
  • the retaining ring is preferably characterized by a width, i.e., it extends in the axial direction, which essentially corresponds to that of the retaining ring or is slightly larger in the sense of protruding.
  • the unscrewing lock consisting of the retaining ring and the locking ring is therefore relatively compact in the radial and axial directions and does not require any additional installation space. This can also easily be retrofitted in existing systems or replace the known solutions.
  • the locking ring comprises several ring segments that are separate from one another.
  • the locking ring is composed of two separate ring segments, whereby these ring segments can form half-shell elements which can then be inserted into the groove in the threaded rod in a form-fitting manner, together completely or almost completely surround the threaded rod over the circumference and by sliding the closed retaining ring into the Groove are held.
  • the at least two-part Design is easy to assemble and the individual ring segments remain relatively dimensionally stable even under the influence of torsion.
  • the securing ring is interrupted exactly once over its circumference. It can thus be pushed over the threaded rod into the groove in the manner of a spring ring, in particular transversely to the longitudinal axis of the threaded rod, wherein it is preferably spread open elastically.
  • the retaining ring can be pushed onto the securing ring radially on the outside and prevent it from spreading again.
  • the unscrewing lock comprises an axial disk which is arranged axially next to the locking ring on the threaded rod and forms an axial contact surface for the locking ring and the retaining ring. Accordingly, the axial disk protrudes beyond the locking ring in the radial direction, so that the retaining ring arranged on the locking ring can be supported on the axial disk in the axial direction.
  • the axial disk can be positioned in the groove together with the locking ring.
  • the axial disk is arranged outside the groove on the threaded rod and, in particular, is supported in the axial direction against a collar of the threaded rod at the axial end of the external thread of the threaded rod.
  • the coupling element or elements can in particular be screwed directly onto the threaded rod and preferably each have a screw body provided with an internal thread, which is screwed onto the external thread of the threaded rod, as well as a coupling eye articulated to the screw body.
  • a pivot is preferably connected to the threaded rod in an axially central region of the threaded rod.
  • Such a lever can have a base body connected to the threaded rod in a rotationally test manner and a handle connected to it in an articulated manner.
  • the groove in the threaded rod into which the locking ring is inserted preferably has a rectangular cross section.
  • other cross-sectional shapes are also possible, for example a V-shaped cross-section.
  • the locking ring preferably has a shoulder which rests axially next to the groove on a radially outer surface of the threaded rod when the locking ring is inserted into the groove.
  • the locking ring has a T-shaped cross-section, with a foot region of the T-shaped cross section engaging the groove and a roof region of the T-shaped cross section extending in the axial direction on the outside of the threaded rod and thus preferably forming two radially inner shoulders, which rest radially on the outside of the threaded rod.
  • the securing ring has an angular shape, for example, with one leg of the bracket engaging the groove and the other leg of the bracket forming the shoulder.
  • the cross-sectional shapes relate to an axial section through the locking ring, that is to say through the section along the longitudinal direction of the threaded rod, in each case based on a side next to the longitudinal axis.
  • the unscrewing lock preferably has such a maximum radial extension that it can be displaced within a bore of the respective coupling element.
  • Figure 1 is a three-dimensional view of a screw coupling according to the invention.
  • FIG. 2 shows an axial plan view of an anti-screw lock according to the invention
  • FIG. 3 shows an axial section along the section line A-A from FIG.
  • FIG. 1 a screw coupling according to the invention is shown, with which two rail vehicles, each comprising a towing hook, can be coupled to one another.
  • the screw coupling has a threaded rod 1, which is also referred to as a spindle, on each of whose two axial ends a coupling element 2, 3 is screwed.
  • the coupling elements 2, 3 can also be attached to a coupling device of the rail vehicle other than a towing hook, for example to a bolt 20, as shown here schematically by the dashed lines.
  • the coupling elements 2, 3 are designed here in particular as screw coupling brackets.
  • Each coupling element 2, 3 has a screw body 15, here in the form of a cube or parallelepiped, which comprises an internal thread 14 which is screwed onto the external thread 4 of the threaded rod 1.
  • a coupling eye 16 is connected in an articulated manner to the screw body 15 and can be pushed or hooked in via a corresponding component on the rail vehicle, for example a draw hook or bolt 20, in order to achieve a Establish positive connection, at least for tensile forces, with the rail vehicle.
  • a handle 17 is connected to the threaded rod 1 in a rotationally fixed manner in the axial center of the threaded rod 1 between two sections of the external thread 4. This can be gripped and forms a lever for introducing the torque into the threaded rod 1.
  • the unscrewing protection 5 preferably has such a maximum radial extension that it can be displaced within a bore of the screw body 15.
  • FIGS. 1-10 Details of an advantageous anti-unscrewing device are shown in FIGS.
  • Each unscrewing lock 5 has a locking ring 7 which concentrically surrounds the longitudinal axis 19 of the threaded rod 1 and is inserted into a groove 6 in the area of the axial end of the threaded rod 1.
  • the locking ring 7 has at least one interruption over its circumference.
  • the securing ring 7 is composed of two separate ring segments 7.1, 7.2, which are inserted into the groove 6 State only have a small distance from one another in the circumferential direction, so that they enclose the threaded rod 1 almost over its entire circumference.
  • the ring segments 7.1 and 7.2 viewed in an axial section through the longitudinal axis 19, each have a T-shaped cross section, the foot area being inserted into the groove 6 and the roof area forming two radially inner shoulders 18, which are located on the outer circumference of the threaded rod 1 rest.
  • the ring segments 7.1 and 7.2 can thus be easily and precisely positioned and held on the outside of the threaded rod 1 or in the groove 6.
  • a retaining ring 8 is pushed radially on the outside onto the retaining ring 7, that is to say onto both ring segments 7.1 and 7.2, which is closed over its circumference and the retaining ring 7 is fully encircled encloses.
  • the retaining ring 8 is preferably welded to the securing ring 7, for example with a plurality of weld seams 13 distributed over the circumference.
  • the retaining ring 8 preferably has a bevel 12 at its front end facing away from the external thread 4, into which the weld seams 13 can be introduced, so that the weld seams 13 have the radially inclined inwardly directed surface of the bevel 12 and the radially contact the outwardly facing surface of the locking ring 7 released by the bevel 12.
  • the radially outer surface 21 of the retaining ring 8 can be designed as a free surface, in particular as a cylindrical surface, and can be at a distance from the surrounding components of the screw coupling.
  • an axial disk 9 is provided axially next to the locking ring 7 and the retaining ring 8 radially outside on the threaded rod 1, which one Axial contact surface 10 forms both for the retaining ring 7 and for the retaining ring 8.
  • the axial disk 9 is preferably supported against the threaded rod 1 on a collar 11 at the end of the external thread 4.
  • the axial washer 9 ensures that the locking ring 7 and the retaining ring 8 are aligned with one another in the radial direction and can also represent a stop surface for the screw body 15 in order to block it against unscrewing beyond the axial end of the threaded rod 1.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)

Abstract

L'invention concerne un attelage à vis pour accoupler deux véhicules sur rail, comprenant une tige filetée pourvue d'un élément d'accouplement respectif dans la région de chacune des extrémités axiales de la tige filetée. Au moins un des éléments d'accouplement ou les deux éléments d'accouplement sont vissés sur un filetage extérieur de la tige filetée, et la tige filetée peut tourner afin de faire varier ainsi la distance entre les deux éléments d'accouplement. L'attelage à vis comprend également au moins un mécanisme de protection contre le dévissage au niveau de l'extrémité axiale de la tige filetée sur laquelle est vissé l'élément d'accouplement, ledit mécanisme de protection contre le dévissage empêchant l'élément d'accouplement de se dévisser sur l'extrémité axiale de la tige filetée, et le mécanisme de protection contre le dévissage comprend une rainure qui s'étend au moins sur une section de la circonférence de la tige filetée et dans laquelle est insérée une bague de fixation faisant saillie radialement à l'extérieur de la rainure, la circonférence de la bague de fixation étant interrompue au moins au niveau d'un emplacement. L'attelage à vis selon l'invention est caractérisé en ce qu'une bague de maintien présentant une circonférence fermée est disposée radialement vers l'extérieur sur la bague de fixation, ladite bague de maintien entourant toute la circonférence de la bague de fixation.
EP20812301.8A 2019-12-02 2020-11-25 Attelage à vis pour accoupler deux véhicules sur rail Active EP4069571B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102019132638 2019-12-02
PCT/EP2020/083306 WO2021110501A1 (fr) 2019-12-02 2020-11-25 Attelage à vis pour accoupler deux véhicules sur rail

Publications (2)

Publication Number Publication Date
EP4069571A1 true EP4069571A1 (fr) 2022-10-12
EP4069571B1 EP4069571B1 (fr) 2024-06-05

Family

ID=73598111

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20812301.8A Active EP4069571B1 (fr) 2019-12-02 2020-11-25 Attelage à vis pour accoupler deux véhicules sur rail

Country Status (3)

Country Link
EP (1) EP4069571B1 (fr)
DE (1) DE102020131158A1 (fr)
WO (1) WO2021110501A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191111136A (en) 1911-05-08 1912-04-11 William Thorn Improvements in Couplings for Railway Coaches and the like.
GB191120522A (en) * 1911-09-16 1912-06-06 Samuel Thomas Gresham Improved Screw-schackle Coupling for Railway Vehicles.
FR552918A (fr) * 1922-05-16 1923-05-09 Cric à montée rapide
GB2014265A (en) 1978-02-11 1979-08-22 Lucas Industries Ltd Anti-Tamper Device
CA2788339C (fr) * 2010-06-14 2016-04-19 Alcoa Inc. Bague de retenue

Also Published As

Publication number Publication date
DE102020131158A1 (de) 2021-06-02
WO2021110501A1 (fr) 2021-06-10
EP4069571B1 (fr) 2024-06-05

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