EP0940315B1 - A movable foot-step for vehicles - Google Patents

A movable foot-step for vehicles Download PDF

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Publication number
EP0940315B1
EP0940315B1 EP98890060A EP98890060A EP0940315B1 EP 0940315 B1 EP0940315 B1 EP 0940315B1 EP 98890060 A EP98890060 A EP 98890060A EP 98890060 A EP98890060 A EP 98890060A EP 0940315 B1 EP0940315 B1 EP 0940315B1
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EP
European Patent Office
Prior art keywords
electric motor
hollow shaft
spring
movable step
fold
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 - Lifetime
Application number
EP98890060A
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German (de)
French (fr)
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EP0940315A1 (en
Inventor
Martin Ing. Fink
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.)
Knorr Bremse GmbH
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Knorr Bremse 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 Knorr Bremse GmbH filed Critical Knorr Bremse GmbH
Priority to EP98890060A priority Critical patent/EP0940315B1/en
Priority to AT98890060T priority patent/ATE252010T1/en
Priority to DE59809922T priority patent/DE59809922D1/en
Publication of EP0940315A1 publication Critical patent/EP0940315A1/en
Application granted granted Critical
Publication of EP0940315B1 publication Critical patent/EP0940315B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61D—BODY DETAILS OR KINDS OF RAILWAY VEHICLES
    • B61D23/00—Construction of steps for railway vehicles
    • B61D23/02—Folding steps for railway vehicles, e.g. hand or mechanically actuated
    • B61D23/025—Folding steps for railway vehicles, e.g. hand or mechanically actuated electrically or fluid actuated

Definitions

  • the invention relates to a movable step for Vehicles, in particular for passenger cars from Rail vehicles.
  • Such movable steps are usually the lowest and therefore outermost on the vehicle and lie unprotected in the lower area of the body, so that they increased challenges from dirt and water spray and exposed to extreme temperatures. It is therefore necessary that these movable steps be robust and are designed to be as maintenance-free as possible while doing so work reliably. In addition to that, just in Area of entry and exit the space available in the lower Car body area is small, so that Drive mechanism and the entire movable step must be as compact as possible.
  • a movable step designed as a folding step for vehicles that is opened by means of an electric motor against the force of a spring is known from DE-A1-43 37 683.
  • the invention aims to provide such a door and Disadvantages of previously known devices avoid.
  • a gear more preferably provided coaxially with the rotary shaft, which has the advantage of a small, relatively quick to be able to use rotating motor and also the Advantage that the holding effect of Armature brake is amplified by the gear, so that the Brake can be designed for much smaller forces can than it corresponds to the force of the return spring.
  • an overload protection is provided, the for example, works as a friction clutch or in the case the occurrence of impermissible resistance torques The motor switches off.
  • FIGS. 1 and 2 one is According to the invention constructed step, which in their Whole is designated by 1 around an axis 2 pivotable.
  • the axis 2 is preferably a hollow shaft trained and carries one inside Torsion spring 4, which is installed so that the Actual, pivotable step 5 in the in Fig. 2nd Folded up position, drawn in dashed lines, urges.
  • this folded up position corresponds to the state during of moving the vehicle.
  • a motor 6 preferably an electric motor that is activated via a Gear 7 and an overload protection 8, the hollow shaft 3rd rotated against the force of the spring 4 until the in Fig. 1st shown pivoted position is reached.
  • the step serves the position of those getting in and out Passengers.
  • Armature brake 9 is provided, which is known per se and works as follows:
  • the armature brake 9th activated, i.e. electricity flows through it and fixes the motor shaft, which is also the armature shaft is opposite the housing. Since this armature brake 9 itself is located on the motor side of the gearbox your holding force exerted by the gearbox (lack Movement without power) reinforces and prevents the Force of the torsion spring 4 the step 5 in the brought up position.
  • the armature brake 9 of the motor 6 can be switched off.
  • the armature brake 9 in contrast to Motor 6 can easily be designed so that it is a enduring constant current.
  • Step intrinsically safe i.e. that it fails in the event of failure of the equipment has reached the safe position.
  • the device according to the invention compact and can with (in example shown) eight screws or rivets on Car body to be attached. Because the space required for the Torsion spring 4 and the drive part, which in its Entire is denoted by 10 and preferably light soluble on the hollow shaft 3 or the support bracket 11 attachable and therefore easy to replace, is small, there is enough space around the width of the Adjust the step to the width of the entrance without that changes in these mechanically significant parts would be necessary. It can therefore always be the same Torsion springs 4 and always the same drive units 10 each on one side lengthwise to that to the Entrances adapted steps 5 can be mounted what warehousing and investment costs reduced.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Vehicle Step Arrangements And Article Storage (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The steps are in the form of hinged steps which can be opened against the force of a spring acting in the closing direction by an electric motor (6) with an armature brake (9) which holds the hinged steps in the open position without the motor requiring power. The spring is a torsion spring mounted in the hollow rotation axle of the hinged steps.

Description

Die Erfindung betrifft eine bewegliche Trittstufe für Fahrzeuge, insbesondere für Personenwaggons von Schienenfahrzeugen.The invention relates to a movable step for Vehicles, in particular for passenger cars from Rail vehicles.

Um das Ein- und Aussteigen von Fahrzeugen durch Personen zu erleichtern, werden vermehrt bewegliche Stufen eingesetzt, die am Fahrzeug angeordnet sind und mit dem Öffnen der Tür oder mit dem Freigeben der Türöffnungsmechanismen von einer eingezogenen Lage, in der sie nicht über das Lichtraumprofil bzw. den Wagenkasten vorragen, in eine ausgefahrene Lage bewegt werden, in der sie von den Personen benutzt werden können.To get people in and out of vehicles moving steps are becoming easier used, which are arranged on the vehicle and with the Open the door or release the Door opening mechanisms from a retracted position in which they do not have the clearance profile or the body project into an extended position in which they can be used by people.

Üblicherweise sind derartige bewegliche Trittstufen, die untersten und somit äußersten am Fahrzeug und liegen ungeschützt im unteren Bereich des Wagenkastens, so daß sie erhöhten Anfechtungen durch Schmutz und Spritzwasser sowie durch extreme Temperaturen ausgesetzt sind. Es ist daher notwendig, daß diese beweglichen Trittstufen robust und möglichst wartungsfrei ausgebildet sind und dabei zuverlässig funktionieren. Dazu kommt noch, daß gerade im Bereich der Ein- und Ausstiege das Platzangebot im unteren Wagenkastenbereich gering ist, so daß der Antriebsmechanismus und die gesamte bewegliche Trittstufe möglichst kompakt gebaut sein muß.Such movable steps are usually the lowest and therefore outermost on the vehicle and lie unprotected in the lower area of the body, so that they increased challenges from dirt and water spray and exposed to extreme temperatures. It is therefore necessary that these movable steps be robust and are designed to be as maintenance-free as possible while doing so work reliably. In addition to that, just in Area of entry and exit the space available in the lower Car body area is small, so that Drive mechanism and the entire movable step must be as compact as possible.

Eine bewegliche, als Klappstufe ausgebildete Trittstufe für Fahrzeuge, die mittels eines Elektromotors gegen die Kraft einer Feder geöffnet wird ist durch die DE-A1-43 37 683 bekannt.A movable step designed as a folding step for vehicles that is opened by means of an electric motor against the force of a spring is known from DE-A1-43 37 683.

Weitere Bedingungen sind, daß die bewegliche Trittstufe bei Ausfall des Antriebes in die Transportlage innerhalb des Lichtraumprofiles ohne fremde Energie gelangen und dort verbleiben muß und daß sie, beispielsweise im Bereich von höheren Bahnsteigen od.dgl., bei unvorsichtigen Passagieren oder unvorsichtig abgestellten Gepäckstücken, während der Ausfahrbewegung nicht mit solcher Kraft bewegt werden soll, daß es zu Verletzungen oder Beschädigungen kommen kann. Other conditions are that the movable step in the event of drive failure in the transport position within of the clearance profile without external energy and must remain there and that, for example, in the area from higher platforms or the like, with careless Passengers or carelessly placed luggage, not moved with such force during the extension movement should be that it could cause injury or damage can come.

Die Erfindung bezweckt eine solche Tür zu schaffen und die Nachteile bisher bekannt gewordener Vorrichtungen zu vermeiden.The invention aims to provide such a door and Disadvantages of previously known devices avoid.

Erfindungsgemäß ist dazu eine Trittstufe mit den kennzeichnenden Merkmalen von Anspruch 1 vorgesehen.According to the invention, a step is provided with the characterizing features of claim 1.

Durch diese Maßnahmen erreicht man eine äußerst kompakte Bauweise, besonders wenn die Feder als Torsionsfeder ausgebildet ist und in der als Hohlwelle ausgebildeten Drehachse der Klappstufe untergebracht ist. Bei koaxialer Anordnung des Motors, der Ankerbremse und der Rückholfeder wird eine im wesentlichen unterhalb der Trittstufe liegende Antriebsanordnung erreicht.These measures make it extremely compact Construction, especially if the spring is a torsion spring is formed and in the form of a hollow shaft Axis of rotation of the folding stage is housed. With coaxial Arrangement of the motor, the armature brake and the return spring becomes one essentially below the step horizontal drive arrangement reached.

In einer Ausgestaltung der Erfindung ist zwischen dem Motor und der Drehwelle der Trittstufe ein Getriebe, weiter bevorzugt koaxial mit der Drehwelle, vorgesehen, was den Vorteil hat, einen kleinen, relativ schnell drehenden Motor verwenden zu können und darüberhinaus den Vorteil mit sich bringt, daß auch die Haltewirkung der Ankerbremse durch das Getriebe verstärkt wird, sodaß die Bremse für wesentlich kleinere Kräfte ausgelegt werden kann, als es der Kraft der Rückholfeder entspricht.In one embodiment of the invention between the Motor and the rotating shaft of the step a gear, more preferably provided coaxially with the rotary shaft, which has the advantage of a small, relatively quick to be able to use rotating motor and also the Advantage that the holding effect of Armature brake is amplified by the gear, so that the Brake can be designed for much smaller forces can than it corresponds to the force of the return spring.

In einer weiteren Ausgestaltung ist zwischen dem Getriebe und der Drehwelle ein Überlastschutz vorgesehen, der beispielsweise als Reibungskupplung arbeitet oder im Falle des Auftretens unzulässiger Widerstandsdrehmomente den Motor stromlos schaltet.In a further embodiment is between the gear and the rotary shaft an overload protection is provided, the for example, works as a friction clutch or in the case the occurrence of impermissible resistance torques The motor switches off.

Die Erfindung wird im folgenden an Hand eines Ausführungsbeispieles näher erläutert. Dabei zeigt

  • die Fig. 1 eine erfindungsgemäße Trittstufe in ausgefahrenem Zustand in einer Seitenansicht,
  • die Fig. 2 die Trittstufe gemäß Fig. 1 in einer Längsansicht und
  • die Fig. 3 den erfindungsgemäßen Antrieb für eine solche Trittstufe in vergrößerter, schematischer Darstellung.
    • The invention is explained in more detail below using an exemplary embodiment. It shows
  • 1 a step according to the invention in the extended state in a side view,
  • 2 shows the step according to FIG. 1 in a longitudinal view and
  • 3 shows the drive according to the invention for such a step in an enlarged, schematic representation.

    • Wie aus den Fig. 1 und 2 ersichtlich ist, ist eine erfindungsgemäß aufgebaute Trittstufe, die in ihrer Gesamtheit mit 1 bezeichnet wird, um eine Achse 2 verschwenkbar. Die Achse 2 ist bevorzugt als Hohlwelle ausgebildet und trägt in ihrem Inneren eine Torsionsfeder 4, die so eingebaut ist, daß sie die eigentliche, schwenkbare Trittstufe 5 in die in Fig. 2 strichliert eingezeichnete, hochgeklappte Lage drängt.As can be seen from FIGS. 1 and 2, one is According to the invention constructed step, which in their Whole is designated by 1 around an axis 2 pivotable. The axis 2 is preferably a hollow shaft trained and carries one inside Torsion spring 4, which is installed so that the Actual, pivotable step 5 in the in Fig. 2nd Folded up position, drawn in dashed lines, urges.

    In dieser in Fig. 2 strichliert eingezeichneten Lage ragt kein Teil der erfindungsgemäßen Trittstufe 1 über das (nicht dargestellte) Lichtraumprofil hinaus, diese hochgeklappte Lage entspricht somit dem Zustand während des Bewegens des Fahrzeuges.In this position shown in dashed lines in Fig. 2 protrudes no part of step 1 according to the invention via the Clearance profile (not shown), this folded up position corresponds to the state during of moving the vehicle.

    Um den Benutzungszustand zu erreichen, wird, wie insbesondere aus Fig. 3 ersichtlich, ein Motor 6, bevorzugt ein Elektromotor, aktiviert, der über ein Getriebe 7 und einen Überlastschutz 8 die Hohlwelle 3 gegen die Kraft der Feder 4 verdreht, bis die in Fig. 1 dargestellte ausgeschwenkte Lage erreicht ist. In dieser Lage dient die Trittstufe den ein- und aussteigenden Passagieren.To achieve the state of use, how 3, a motor 6, preferably an electric motor that is activated via a Gear 7 and an overload protection 8, the hollow shaft 3rd rotated against the force of the spring 4 until the in Fig. 1st shown pivoted position is reached. In this The step serves the position of those getting in and out Passengers.

    Um nun während des Aufrechterhaltens dieser Lage den Motor 6 stromlos schalten zu können, ist eine sogenannte Ankerbremse 9 vorgesehen, die an sich bekannt ist und folgendermaßen funktioniert:To now keep the motor while maintaining this position 6 being able to switch off current is a so-called Armature brake 9 is provided, which is known per se and works as follows:

    Nach Erreichen der ausgeklappten Lage, was durch einen Sensor festgestellt werden kann, wird die Ankerbremse 9 aktiviert, d.h. sie wird von Strom durchflossen und fixiert so die Motorwelle, die ja zugleich die Ankerwelle ist, gegenüber dem Gehäuse. Da diese Ankerbremse 9 sich auf der Motorseite des Getriebes befindet, wird die von ihr ausgeübte Haltekraft durch das Getriebe (mangels Bewegung leistungslos) verstärkt und verhindert, daß die Kraft der Torsionsfeder 4 die Trittstufe 5 in die hochgeschwenkte Lage bringt.After reaching the unfolded position, what by one Sensor can be determined, the armature brake 9th activated, i.e. electricity flows through it and fixes the motor shaft, which is also the armature shaft is opposite the housing. Since this armature brake 9 itself is located on the motor side of the gearbox your holding force exerted by the gearbox (lack Movement without power) reinforces and prevents the Force of the torsion spring 4 the step 5 in the brought up position.

    Es kann somit zeitgleich mit dem Aktivieren der Ankerbremse 9 der Motor 6 stromlos geschalten werden. Dazu ist noch zu sagen, daß die Ankerbremse 9 im Gegensatz zum Motor 6 problemlos so ausgelegt werden kann, daß sie ein dauerndes Bestromes erträgt.It can therefore be activated at the same time as the The armature brake 9 of the motor 6 can be switched off. To is to be said that the armature brake 9 in contrast to Motor 6 can easily be designed so that it is a enduring constant current.

    Kommt es nun durch einen Defekt od.dgl. zu einer Unterbrechung der Stromversorgung der gesamten Vorrichtung, so fällt die Ankerbremse 9, der Motor 6 bleibt natürlich stromlos und die Torsionsfeder 4 dreht die Trittstufe 5 in die in Fig. 2 strichliert eingezeichnete Lage. Es ist daher die erfindungsgemäße Trittstufe intrinsisch sicher, d.h., daß sie bei Ausfall des Betriebsmittels in die sichere Lage gelangt.If there is a defect or the like. to a Interruption of the power supply to the whole Device, the armature brake 9, the motor 6 falls of course remains de-energized and the torsion spring 4 rotates the step 5 in the dashed lines in Fig. 2 marked location. It is therefore the invention Step intrinsically safe, i.e. that it fails in the event of failure of the equipment has reached the safe position.

    Die Sicherheit kann weiter verstärkt werden, wenn statt einer Torsionsfeder 4 zwei jeweils schwächer ausgebildete vorgesehen sind, die jede für sich in der Lage ist, die Trittstufe 5 einzuklappen, so daß auch im Falle des Bruches einer Torsionsfeder 4 noch gewährleistet ist, daß die Trittstufe 5 in die hochgeklappte Lage gelangt.Security can be further strengthened if instead a torsion spring 4 two each weaker are provided, each of which is capable of itself Fold step 5, so that even in the case of Fracture of a torsion spring 4 is still ensured that step 5 reaches the raised position.

    Es ist selbstverständlich möglich, die Erfindung weiter auszugestalten und entsprechende Sensoren vorzusehen, die überprüfen, ob die Trittstufe in die jeweils gewünschte Lage gelangt ist oder nicht und die den jeweiligen Betriebszustand dem Fahrer oder einem Begleiter melden, doch ist dies nicht der Kern der Erfindung. It is of course possible to continue the invention to design and provide appropriate sensors that check that the step is in the desired position Situation has arrived or not and the respective Report the operating status to the driver or a companion, however, this is not the essence of the invention.

    Dem Grundgedanken der Erfindung wesentlich näher und diesen direkt ausgestaltend, ist der in Fig. 3 zwischen dem Getriebe und der Hohlwelle 3 vorgesehene Überlastschutz 8, der beim Auftreten eines definierten, bevorzugt einstellbaren, Drehmomentes die Stromversorgung zum Motor 6 unterbricht und so verhindert, daß beim Ausklappen der Trittstufe 5 Personen oder Gegenstände zwischen Unterkante der Trittstufe und einer Bahnsteigkante od.dgl. eingeklemmt werden. Beim Hochklappen der Trittstufe ist ein solches Einklemmen wegen der relativ geringen Kraft der Torsionsfeder 4 nicht mit ernsthaften Folgen verbunden und bedarf daher keiner besonderen Vorkehrung.The basic idea of the invention much closer and designing this directly, is that in FIG. 3 between the transmission and the hollow shaft 3 provided Overload protection 8, which occurs when a defined, preferably adjustable, torque the power supply interrupts to the motor 6 and thus prevents the Unfold the step 5 people or objects between the lower edge of the step and one Platform edge or the like. be pinched. At the Folding up the step is such a pinching not because of the relatively low force of the torsion spring 4 with serious consequences and therefore does not need any special precaution.

    Wie aus der Zeichnung ersichtlich ist, ist die erfindungsgemäße Vorrichtung kompakt und kann mit (im dargestellten Beispiel) acht Schrauben oder Nieten am Wagenkasten befestigt werden. Da der Platzbedarf für die Torsionsfeder 4 und den Antriebsteil, der in seiner Gesamtheit mit 10 bezeichnet wird und der bevorzugt leicht löslich an der Hohlwelle 3 bzw. der Tragkonsole 11 befestigbar und daher leicht austauschbar ist, gering ist, steht genügend Platz zur Verfügung um die Breite der Trittstufe an die Breite des Einstieges anzupassen, ohne daß Veränderungen dieser mechanisch bedeutsamen Teile notwendig wären. Es können daher immer die gleichen Torsionsfedern 4 und immer die gleichen Antriebseinheiten 10 jeweils auf einer Seite der Länge nach an die an die Einstiege angepaßten Trittstufen 5 montiert werden, was die Lagerhaltung und die Investitionskosten reduziert.As can be seen from the drawing, the device according to the invention compact and can with (in example shown) eight screws or rivets on Car body to be attached. Because the space required for the Torsion spring 4 and the drive part, which in its Entire is denoted by 10 and preferably light soluble on the hollow shaft 3 or the support bracket 11 attachable and therefore easy to replace, is small, there is enough space around the width of the Adjust the step to the width of the entrance without that changes in these mechanically significant parts would be necessary. It can therefore always be the same Torsion springs 4 and always the same drive units 10 each on one side lengthwise to that to the Entrances adapted steps 5 can be mounted what warehousing and investment costs reduced.

    Claims (6)

    1. A movable step (1) for vehicles, in particular for passenger coaches of rail vehicles, wherein the movable step is in the form of a fold-away step (5) which is opened by means of an electric motor (6) against the force of a spring (4) which acts thereon in the retracting direction, characterised in that an armature brake (9) for the electric motor (6) is provided so as to keep the fold-away step (5) in the open position without having to energise the electric motor (6).
    2. A movable step (1) according to Claim 1, characterised in that the spring (4) is in the form of a torsion spring and is accommodated within the axis of rotation of the fold-away step (5) in the form of a hollow shaft (2).
    3. A movable step according to Claim 2, characterised in that the electric motor (6), the armature brake (9) and the spring (4) are disposed coaxially to the hollow shaft (2) and are preferably situated substantially under the fold-away step (5) in its folded-out position.
    4. A movable step (1) according to any one of the preceding Claims, characterised in that a transmission (7) is disposed between the electric motor (6) and the hollow shaft (2), preferably coaxially to the hollow shaft.
    5. A movable step (1) according to any one of the preceding Claims, characterised in that an overload protection (8), for example a friction coupling, is disposed between the transmission (7) and the hollow shaft (2).
    6. A movable step according to Claim 5, characterised in that the overload protection (8) de-energises the electric motor (6) in the event of inadmissible resistance torques occurring between the transmission (7) and the hollow shaft (2).
    EP98890060A 1998-03-05 1998-03-05 A movable foot-step for vehicles Expired - Lifetime EP0940315B1 (en)

    Priority Applications (3)

    Application Number Priority Date Filing Date Title
    EP98890060A EP0940315B1 (en) 1998-03-05 1998-03-05 A movable foot-step for vehicles
    AT98890060T ATE252010T1 (en) 1998-03-05 1998-03-05 MOVABLE STEPS FOR VEHICLES
    DE59809922T DE59809922D1 (en) 1998-03-05 1998-03-05 Movable step for vehicles

    Applications Claiming Priority (1)

    Application Number Priority Date Filing Date Title
    EP98890060A EP0940315B1 (en) 1998-03-05 1998-03-05 A movable foot-step for vehicles

    Publications (2)

    Publication Number Publication Date
    EP0940315A1 EP0940315A1 (en) 1999-09-08
    EP0940315B1 true EP0940315B1 (en) 2003-10-15

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    ID=8237152

    Family Applications (1)

    Application Number Title Priority Date Filing Date
    EP98890060A Expired - Lifetime EP0940315B1 (en) 1998-03-05 1998-03-05 A movable foot-step for vehicles

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    EP (1) EP0940315B1 (en)
    AT (1) ATE252010T1 (en)
    DE (1) DE59809922D1 (en)

    Cited By (1)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102014113423A1 (en) 2014-09-17 2016-03-17 Bombardier Transportation Gmbh Drive unit for a step of a rail vehicle, tread unit, and rail vehicle with a tread unit

    Families Citing this family (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    AT412461B (en) * 2002-04-02 2005-03-25 Knorr Bremse Gmbh FLIP-STARTING TRACK FOR ONE VEHICLE
    AT12967U1 (en) * 2011-02-01 2013-03-15 Siemens Ag Oesterreich FOLDING STEP FOR A RAIL VEHICLE

    Family Cites Families (3)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    CH663765A5 (en) * 1984-07-04 1988-01-15 Inventio Ag Folding step for tram-car - contains torsion strip allowing step to tilt under load, independently of drive, in emergency
    AT406362B (en) * 1993-10-22 2000-04-25 Ife Gmbh MOVABLE STEP OF A VEHICLE, ESPECIALLY A RAIL VEHICLE
    CH688998A5 (en) * 1994-01-05 1998-07-15 Siemens Sgp Verkehrstech Gmbh Folding steps.

    Cited By (2)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    DE102014113423A1 (en) 2014-09-17 2016-03-17 Bombardier Transportation Gmbh Drive unit for a step of a rail vehicle, tread unit, and rail vehicle with a tread unit
    EP2998182A1 (en) 2014-09-17 2016-03-23 Bombardier Transportation GmbH Drive unit for a step of a rail vehicle, step unit, and rail vehicle with a step unit

    Also Published As

    Publication number Publication date
    ATE252010T1 (en) 2003-11-15
    EP0940315A1 (en) 1999-09-08
    DE59809922D1 (en) 2003-11-20

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