EP3619358B1 - Tamping unit for tamping sleepers of a track - Google Patents

Tamping unit for tamping sleepers of a track Download PDF

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Publication number
EP3619358B1
EP3619358B1 EP18727143.2A EP18727143A EP3619358B1 EP 3619358 B1 EP3619358 B1 EP 3619358B1 EP 18727143 A EP18727143 A EP 18727143A EP 3619358 B1 EP3619358 B1 EP 3619358B1
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EP
European Patent Office
Prior art keywords
tamping
housing
tamping unit
eccentric
eccentric shaft
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EP18727143.2A
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German (de)
French (fr)
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EP3619358A1 (en
Inventor
Nikolaus MATZINGER
Lothar Stadler
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Plasser und Theurer Export Von Bahnbaumaschinen GmbH
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Plasser und Theurer Export Von Bahnbaumaschinen GmbH
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Priority to PL18727143T priority Critical patent/PL3619358T3/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B06—GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
    • B06B—METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, e.g. FOR PERFORMING MECHANICAL WORK IN GENERAL
    • B06B1/00—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
    • B06B1/10—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy
    • B06B1/16—Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency making use of mechanical energy operating with systems involving rotary unbalanced masses
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B27/00—Placing, renewing, working, cleaning, or taking-up the ballast, with or without concurrent work on the track; Devices therefor; Packing sleepers
    • E01B27/12—Packing sleepers, with or without concurrent work on the track; Compacting track-carrying ballast
    • E01B27/13—Packing sleepers, with or without concurrent work on the track
    • E01B27/16—Sleeper-tamping machines
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/12—Tamping devices
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01B—PERMANENT WAY; PERMANENT-WAY TOOLS; MACHINES FOR MAKING RAILWAYS OF ALL KINDS
    • E01B2203/00—Devices for working the railway-superstructure
    • E01B2203/12—Tamping devices
    • E01B2203/127—Tamping devices vibrating the track surface

Definitions

  • the invention relates to a tamping unit for tamping under sleepers of a track, with a lowerable tool carrier and opposite tamping tools, each tamping tool being connected via a swivel arm to an auxiliary drive to generate a auxiliary movement and to an electric vibration drive to generate a vibratory movement.
  • Tamping units for tamping under sleepers of a track are already widely known.
  • a vibration movement is generated by means of an eccentric drive.
  • This includes a rotatable eccentric shaft on which auxiliary drives are articulated to transmit the vibrations to the tamping tines.
  • a tamping unit in which eccentric bearing bushes are arranged in the pivot arms of the tamping tines to generate vibrations.
  • a drive shaft driven by an electric motor transmits a rotary movement to the eccentric bearing bushes via a chain drive.
  • the invention is based on the object of specifying an improvement over the prior art for a tamping unit of the type mentioned at the beginning.
  • the electric vibration drive comprises an eccentric shaft which, together with a rotor of an electric motor is only stored in an eccentric housing and that a stator of the electric motor is flanged to a motor housing on the eccentric housing.
  • the clear advantage here is the compactness and small design of the tamping unit. As there is no need for its own motor mounting, the motor housing has a particularly low overall depth. In the arrangement according to the invention, no gear is provided either, so that a high degree of efficiency and high stability of the drive are achieved.
  • the rotor of the electric motor acts as a flywheel, which means that a separate flywheel can be omitted.
  • flywheel By means of the flywheel, kinetic energy is temporarily stored during a vibration oscillation cycle, so that the generation of vibrations has a high level of efficiency overall.
  • the use of the electric motor directly on the eccentric shaft allows the vibration frequency to be changed particularly quickly. In this way, the frequency can be continuously adjusted during a stuffing cycle. For example, the frequency is increased when penetrating a ballast bed and reduced or switched off when the tamping unit is raised.
  • the electric motor is a torque motor designed as an internal rotor.
  • Torque motors have very high torques at relatively low speeds.
  • the high drive torque of torque motors enables great accelerations.
  • the resulting high dynamic of the system has a positive effect on the tamping unit, which is immersed in a ballast bed with its tamping tines. There is practically no wear in the torque motor, which has a positive effect on the maintenance of the tamping unit.
  • Another advantageous detail of the invention is a water cooling associated with the electric motor.
  • the heat generated by the electric motor during operation is dissipated as quickly as possible.
  • the electric motor and water cooling are encapsulated, so that no dust that arises when plugging can get inside the motor.
  • a further variant provides that the form-fitting connection is designed as external toothing of the eccentric shaft and internal toothing of a bushing connected to the rotor.
  • the interlocking of two connection partners ensures permanent, stable power transmission.
  • the torque is evenly transmitted over the tooth flanks of the multiple driver connection.
  • the internal toothing of the rotor is simply pulled off the external toothing of the eccentric shaft. A simple assembly is done in reverse.
  • the form-fitting connection is designed as a screw connection. On the one hand, this ensures reliable transmission of the torque and, on the other hand, maintenance work can be carried out on site using simple tools.
  • the motor housing is advantageously sealed off from the eccentric housing by means of a sealing ring at a passage in the eccentric shaft. This permanently prevents any lubricating oil that may be in the eccentric housing from penetrating into the motor housing.
  • the motor housing is positioned relative to the eccentric housing by means of a centering. This means that the motor housing does not have to be aligned with respect to the eccentric housing in order to form a uniform air gap between the rotor and stator.
  • the eccentric shaft has a plurality of eccentric sections, with different eccentric sections being assigned to the opposite tamping tools. In this way, a favorable, opposite vibration oscillation is achieved on the opposite tamping tools.
  • the eccentric shaft has an eccentric section on which a transmission element for Transmission of the vibratory movement is stored. Both auxiliary drives for transmitting the vibrational oscillation are then arranged on the transmission element.
  • a transmission element designed as a connecting rod the eccentric housing can be sealed in a simple manner, whereby immersion oil lubrication can be implemented in a simple manner.
  • the moving masses on the tamping unit are reduced, thus reducing noise.
  • Fig. 1 shows a simplified tamping unit 1 for tamping under sleepers 2 of a track 3 with a lowerable tool carrier 4 and pairs of two opposite tamping tools 5.
  • Each tamping tool 5 is connected to an electric vibration drive 8 via a swivel arm 6 and an auxiliary drive 7.
  • the respective swivel arm 6 has an upper swivel axis 9 on which the auxiliary drive 7 is mounted.
  • the respective swivel arm 6 is rotatably mounted on the tool carrier 4 about a lower swivel axis 10.
  • Such a tamping unit 1 is intended for installation in a track 3 movable track tamping machine or a tamping satellite.
  • Fig. 2 a side view of the tamping unit 1 is shown, this being in a lowered position.
  • the vibration drive 8 of the Tamping unit 1 comprises an electric motor 22 with a motor housing 11 which is fastened to the end face of an eccentric housing 12.
  • Fig. 3 a detailed view of the electric vibration drive 8 including the eccentric housing 12 and the motor housing 11 is shown.
  • An eccentric shaft 14 is rotatably mounted in the eccentric housing 12 by means of roller bearings 13.
  • the auxiliary drives 7 designed as hydraulic cylinders 15, 16 are mounted on the eccentric shaft 14. Rolling bearings are also advantageously used here.
  • the mounting of the eccentric shaft 14 is sufficiently precise and stable to also function as the only mounting of a rotor 21 of the electric motor 22.
  • the eccentric shaft 14 has two eccentrics 17, 18.
  • the first hydraulic cylinder 15 is mounted on the first eccentric 17.
  • the second eccentric 18 is divided into two sections on both sides of the first eccentric 17.
  • the second hydraulic cylinder 16 is mounted on this second eccentric 18 by means of a fork-shaped connection.
  • only one eccentric is provided on which a transmission element in the form of a connecting rod is arranged.
  • a vibration movement directed upwards and downwards is generated, which is transmitted to auxiliary drives 7 arranged at an angle.
  • the position of the auxiliary drives 7 in relation to the transmission element determines the vibration amplitude transmitted to the tamping tools 5.
  • the eccentric housing 12 is sealed off from the motor housing 11 by means of a sealing ring 19.
  • the rotor 21 of the electric motor 22 is arranged on an end 20 of the eccentric shaft 14 that faces the motor housing 11 and is connected to the eccentric shaft 14 in a form-fitting manner.
  • the positive connection 23 shown is designed as a screw connection, the rotor 21 being positioned on the eccentric shaft 14 by means of a centering.
  • the electric motor 22 is designed as a torque motor.
  • the dimensions can be adapted to the embodiment of the tamping unit. With the same nominal torque, for example, with an extended The overall depth of the motor 22 can be reduced in diameter. The effect of the rotor 21 as a flywheel can thus also be optimized. The compact design is also achieved by eliminating the need for a separate bearing for the rotor 21.
  • a stator 24 of the electric motor 22 is arranged within the motor housing 11. It is important that the stator 24 is precisely aligned with respect to the rotor 21 in order to ensure a uniform air gap both in the circumferential direction and in the longitudinal direction. This is achieved in a simple manner by means of a centering 25 of the motor housing 11 with respect to the eccentric housing 12.
  • the eccentric shaft 14 can have an additional flywheel 26 on a side facing away from the motor housing 11 in order to further increase the flywheel if required.
  • a rotary encoder 27 for position detection can be arranged on the eccentric shaft 14.
  • Fig. 4 shows a further embodiment of the motor housing 11 flanged to the eccentric housing 12 of an electric motor 22 designed as a torque motor.
  • the positive connection 23 is designed as external teeth of the eccentric shaft 14 and internal teeth of a socket connected to the rotor 21.
  • the torque motor has a small overall depth, which has a positive effect on the installation width of the entire tamping unit 1.
  • This design allows a particularly precise centering of the rotor 21 with respect to the eccentric shaft 14 and the motor housing 11 together with the stator 24 with respect to the eccentric housing 12.
  • the motor housing 11 is sealed in itself and with respect to the eccentric housing in order to prevent contamination of the rotor 21 and the stator 24.
  • a cover 30 of the motor housing 11 fastened by means of screws enables a quick inspection of the electric motor 22.
  • Cooling channels 28 for liquid cooling are arranged around the motor housing 11. Cooling fins 29 arranged around the cooling channels 28 cause additional cooling. By means of a pump (not shown), cooling liquid is continuously passed through the cooling channels 28 in order to dissipate the heat generated during operation. So will In the event of high outside temperatures and strong solar radiation, overheating of the electric motor 22 is reliably prevented.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Laying And Maintaining Railways (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)

Description

Gebiet der TechnikField of technology

Die Erfindung betrifft ein Stopfaggregat zum Unterstopfen von Schwellen eines Gleises, mit einem absenkbaren Werkzeugträger und gegenüberliegenden Stopfwerkzeugen, wobei jedes Stopfwerkzeug über einen Schwenkarm mit einem Beistellantrieb zur Erzeugung einer Beistellbewegung und mit einem elektrischen Vibrationsantrieb zur Erzeugung einer Vibrationsbewegung verbunden ist.The invention relates to a tamping unit for tamping under sleepers of a track, with a lowerable tool carrier and opposite tamping tools, each tamping tool being connected via a swivel arm to an auxiliary drive to generate a auxiliary movement and to an electric vibration drive to generate a vibratory movement.

Stand der TechnikState of the art

Stopfaggregate zum Unterstopfen von Schwellen eines Gleises sind bereits vielfach bekannt. Dabei wird eine Vibrationsbewegung mittels eines Exzenterantriebs erzeugt. Dieser umfasst eine rotierbare Exzenterwelle, an der Beistellantriebe zur Übertragung der Schwingungen auf die Stopfpickel angelenkt sind.Tamping units for tamping under sleepers of a track are already widely known. A vibration movement is generated by means of an eccentric drive. This includes a rotatable eccentric shaft on which auxiliary drives are articulated to transmit the vibrations to the tamping tines.

Aus DE 24 17 062 A1 ist ein Stopfaggregat bekannt, bei dem zur Vibrationserzeugung exzentrische Lagerbüchsen in den Schwenkarmen der Stopfpickel angeordnet sind. Über einen Kettentrieb wird von einer durch einen elektrischen Motor angetriebenen Antriebswelle eine Drehbewegung auf die exzentrischen Lagerbüchsen übertragen.Out DE 24 17 062 A1 a tamping unit is known in which eccentric bearing bushes are arranged in the pivot arms of the tamping tines to generate vibrations. A drive shaft driven by an electric motor transmits a rotary movement to the eccentric bearing bushes via a chain drive.

Zusammenfassung der ErfindungSummary of the invention

Der Erfindung liegt die Aufgabe zugrunde, für ein Stopfaggregat der eingangs genannten Art eine Verbesserung gegenüber dem Stand der Technik anzugeben.The invention is based on the object of specifying an improvement over the prior art for a tamping unit of the type mentioned at the beginning.

Erfindungsgemäß wird diese Aufgabe gelöst durch ein Stopfaggregat gemäß Anspruch 1. Abhängige Ansprüche geben vorteilhafte Ausgestaltungen der Erfindung an.According to the invention, this object is achieved by a tamping unit according to claim 1. Dependent claims specify advantageous embodiments of the invention.

Die Erfindung sieht vor, dass der elektrische Vibrationsantrieb eine Exzenterwelle umfasst, die gemeinsam mit einem Rotor eines Elektromotors lediglich in einem Exzentergehäuse gelagert ist und dass ein Stator des Elektromotors mit einem Motorgehäuse an dem Exzentergehäuse angeflanscht ist. Der klare Vorteil liegt hier in der Kompaktheit und kleinen Bauform des Stopfaggregates. Durch den Entfall einer eigenen Motorlagerung weist das Motorgehäuse eine besonders geringe Bautiefe auf. Bei der erfindungsgemäßen Anordnung ist auch kein Getriebe vorgesehen, wodurch ein hoher Wirkungsgrad und eine hohe Standfestigkeit des Antriebs erreicht werden.The invention provides that the electric vibration drive comprises an eccentric shaft which, together with a rotor of an electric motor is only stored in an eccentric housing and that a stator of the electric motor is flanged to a motor housing on the eccentric housing. The clear advantage here is the compactness and small design of the tamping unit. As there is no need for its own motor mounting, the motor housing has a particularly low overall depth. In the arrangement according to the invention, no gear is provided either, so that a high degree of efficiency and high stability of the drive are achieved.

Zudem fungiert der Rotor des Elektromotors als Schwungmasse, wodurch ein separates Schwungrad entfallen kann. Mittels der Schwungmasse wird während eines Vibrationsschwingzyklus kinetische Energie zwischengespeichert, wodurch die Vibrationserzeugung insgesamt einen hohen Wirkungsgrad aufweist. Als weiteren Vorteil erlaubt der Einsatz des Elektromotors direkt an der Exzenterwelle eine besonders schnelle Änderung der Vibrationsfrequenz. Auf diese Weise kann die Frequenz während eines Stopfzyklus laufend angepasst werden. Beispielsweise wird die Frequenz beim Eindringen in ein Schotterbett erhöht und bei gehobenem Stopfaggregat reduziert oder abgestellt.In addition, the rotor of the electric motor acts as a flywheel, which means that a separate flywheel can be omitted. By means of the flywheel, kinetic energy is temporarily stored during a vibration oscillation cycle, so that the generation of vibrations has a high level of efficiency overall. As a further advantage, the use of the electric motor directly on the eccentric shaft allows the vibration frequency to be changed particularly quickly. In this way, the frequency can be continuously adjusted during a stuffing cycle. For example, the frequency is increased when penetrating a ballast bed and reduced or switched off when the tamping unit is raised.

Dabei ist es sinnvoll, wenn der Elektromotor ein als Innenläufer ausgebildeter Torquemotor ist. Torquemotoren weisen sehr hohe Drehmomente bei relativ kleinen Drehzahlen auf. Das große Antriebsmoment von Torquemotoren ermöglicht große Beschleunigungen. Die daraus resultierende große Dynamik des Systems wirkt sich positiv auf das sich in eine Schotterbettung mit seinen Stopfpickeln eingetauchte Stopfaggregat aus. Im Torquemotor kommt es praktisch zu keinem Verschleiß, was sich positiv auf die Wartung des Stopfaggregates auswirkt.It makes sense here if the electric motor is a torque motor designed as an internal rotor. Torque motors have very high torques at relatively low speeds. The high drive torque of torque motors enables great accelerations. The resulting high dynamic of the system has a positive effect on the tamping unit, which is immersed in a ballast bed with its tamping tines. There is practically no wear in the torque motor, which has a positive effect on the maintenance of the tamping unit.

Ein weiteres vorteilhaftes Detail der Erfindung ist eine dem Elektromotor zugeordnete Wasserkühlung. Dadurch wird die durch den Elektromotor im Betrieb entstehende Wärme schnellstmöglich abgeführt. Dabei ist der Elektromotor samt Wasserkühlung gekapselt ausgeführt, sodass kein beim Stopfen entstehender Staub ins Innere des Motors gelangen kann.Another advantageous detail of the invention is a water cooling associated with the electric motor. As a result, the heat generated by the electric motor during operation is dissipated as quickly as possible. The electric motor and water cooling are encapsulated, so that no dust that arises when plugging can get inside the motor.

In einer vorteilhaften Ausprägung der Erfindung ist vorgesehen, dass an einem dem Motorgehäuse zugewandten Ende der Exzenterwelle eine formschlüssige Verbindung mit dem Rotor vorgesehen ist. Dadurch ist eine zuverlässige Kraftübertragung gewährleistet.In an advantageous embodiment of the invention it is provided that at an end of the eccentric shaft facing the motor housing a positive connection with the rotor is provided. This ensures reliable power transmission.

Eine weiterführende Variante sieht vor, dass die formschlüssige Verbindung als Außenverzahnung der Exzenterwelle und Innenverzahnung einer mit dem Rotor verbundenen Buchse ausgebildet ist. Durch das Ineinandergreifen zweier Verbindungspartner (Exzenterwelle, Rotor) ist eine dauerhafte stabile Kraftübertragung sichergestellt. Es erfolgt eine gleichmäßige Übertragung des Drehmoments über die Zahnflanken der Vielfach-Mitnehmerverbindung. Bei Wartungs- und Reparaturarbeiten wird die Innenverzahnung des Rotors einfach von der Außenverzahnung der Exzenterwelle abgezogen. Eine einfache Montage erfolgt in umgekehrter Weise.A further variant provides that the form-fitting connection is designed as external toothing of the eccentric shaft and internal toothing of a bushing connected to the rotor. The interlocking of two connection partners (eccentric shaft, rotor) ensures permanent, stable power transmission. The torque is evenly transmitted over the tooth flanks of the multiple driver connection. During maintenance and repair work, the internal toothing of the rotor is simply pulled off the external toothing of the eccentric shaft. A simple assembly is done in reverse.

Bei einer anderen weiterführenden Variante ist die formschlüssige Verbindung als Schraubverbindung ausgebildet. Einerseits ist damit eine sichere Übertragung des Drehmoments gegeben und andererseits können bereits mit einfachen Werkzeugen Wartungsarbeiten vor Ort vorgenommen werden.In another further variant, the form-fitting connection is designed as a screw connection. On the one hand, this ensures reliable transmission of the torque and, on the other hand, maintenance work can be carried out on site using simple tools.

Vorteilhafterweise ist das Motorgehäuse an einer Durchführung der Exzenterwelle gegenüber dem Exzentergehäuse mittels eines Dichtrings abgedichtet. Damit wird ein Eindringen eines sich gegebenenfalls im Exzentergehäuse befindlichen Schmieröls in das Motorgehäuse dauerhaft verhindert.The motor housing is advantageously sealed off from the eccentric housing by means of a sealing ring at a passage in the eccentric shaft. This permanently prevents any lubricating oil that may be in the eccentric housing from penetrating into the motor housing.

Zudem ist es von Vorteil, wenn das Motorgehäuse mittels einer Zentrierung gegenüber dem Exzentergehäuse positioniert ist. Dadurch muss das Motorgehäuse gegenüber dem Exzentergehäuse nicht erst ausgerichtet werden, um einen gleichmäßigen Luftspalt zwischen Rotor und Stator zu bilden.In addition, it is advantageous if the motor housing is positioned relative to the eccentric housing by means of a centering. This means that the motor housing does not have to be aligned with respect to the eccentric housing in order to form a uniform air gap between the rotor and stator.

Bei einer weiteren vorteilhaften Ausbildung weist die Exzenterwelle mehrere exzentrische Abschnitte auf, wobei den gegenüberliegenden Stopfwerkzeugen unterschiedliche exzentrische Abschnitte zugeordnet sind. Dadurch wird eine günstige gegengleiche Vibrationsschwingung an den gegenüberliegenden Stopfwerkzeugen erreicht.In a further advantageous embodiment, the eccentric shaft has a plurality of eccentric sections, with different eccentric sections being assigned to the opposite tamping tools. In this way, a favorable, opposite vibration oscillation is achieved on the opposite tamping tools.

Eine andere vorteilhafte Ausbildung sieht vor, dass die Exzenterwelle einen exzentrischen Abschnitt aufweist, auf dem ein Übertragungselement zur Übertragung der Vibrationsbewegung gelagert ist. An dem Übertragungselement sind dann beide Beistellantriebe zur Übertragung der Vibrationsschwingung angeordnet. Eine derartige Anordnung ermöglicht auf einfache Weise eine Veränderung einer übertragenen Vibrationsamplitude. Mit einem als Pleuel ausgebildeten Übertragungselement kann das Exzentergehäuse auf einfache Weise abgedichtet werden, wodurch auf einfache Weise eine Tauchölschmierung realisierbar ist. Zudem werden die bewegten Massen am Stopfaggregat reduziert und somit eine Lärmreduktion erreicht.Another advantageous embodiment provides that the eccentric shaft has an eccentric section on which a transmission element for Transmission of the vibratory movement is stored. Both auxiliary drives for transmitting the vibrational oscillation are then arranged on the transmission element. Such an arrangement enables a transmitted vibration amplitude to be changed in a simple manner. With a transmission element designed as a connecting rod, the eccentric housing can be sealed in a simple manner, whereby immersion oil lubrication can be implemented in a simple manner. In addition, the moving masses on the tamping unit are reduced, thus reducing noise.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Die Erfindung wird nachfolgend in beispielhafter Weise unter Bezugnahme auf die beigefügten Figuren erläutert. Es zeigen in schematischer Darstellung:

Fig. 1
Frontansicht Stopfaggregat
Fig. 2
Seitenansicht Stopfaggregat
Fig. 3
Detailansicht Exzentergehäuse und Motorgehäuse
Fig. 4
Detailansicht Motorgehäuse
The invention is explained below by way of example with reference to the accompanying figures. It shows in a schematic representation:
Fig. 1
Front view of the tamping unit
Fig. 2
Side view of the tamping unit
Fig. 3
Detailed view of the eccentric housing and motor housing
Fig. 4
Detailed view of the motor housing

Beschreibung der AusführungsformenDescription of the embodiments

Fig.1 zeigt ein vereinfacht dargestelltes Stopfaggregat 1 zum Unterstopfen von Schwellen 2 eines Gleises 3 mit einem absenkbaren Werkzeugträger 4 und Paaren von zwei gegenüberliegenden Stopfwerkzeugen 5. Jedes Stopfwerkzeug 5 ist über einen Schwenkarm 6 und einen Beistellantrieb 7 mit einem elektrischen Vibrationsantrieb 8 verbunden. Der jeweilige Schwenkarm 6 weist eine obere Schwenkachse 9 auf, auf der der Beistellantrieb 7 gelagert ist. Um eine untere Schwenkachse 10 ist der jeweilige Schwenkarm 6 drehbar auf dem Werkzeugträger 4 gelagert. Ein solches Stopfaggregat 1 ist für den Einbau in eine Gleis 3 verfahrbare Gleisstopfmaschine bzw. einen Stopfsatelliten vorgesehen. Fig. 1 shows a simplified tamping unit 1 for tamping under sleepers 2 of a track 3 with a lowerable tool carrier 4 and pairs of two opposite tamping tools 5. Each tamping tool 5 is connected to an electric vibration drive 8 via a swivel arm 6 and an auxiliary drive 7. The respective swivel arm 6 has an upper swivel axis 9 on which the auxiliary drive 7 is mounted. The respective swivel arm 6 is rotatably mounted on the tool carrier 4 about a lower swivel axis 10. Such a tamping unit 1 is intended for installation in a track 3 movable track tamping machine or a tamping satellite.

In Fig. 2 ist eine Seitenansicht des Stopfaggregats 1 dargestellt, wobei sich dieses in einer abgesenkten Position befindet. Der Vibrationsantrieb 8 des Stopfaggregats 1 umfasst einen Elektromotor 22 mit einem Motorgehäuse 11, das an der Stirnseite eines Exzentergehäuses 12 befestigt ist.In Fig. 2 a side view of the tamping unit 1 is shown, this being in a lowered position. The vibration drive 8 of the Tamping unit 1 comprises an electric motor 22 with a motor housing 11 which is fastened to the end face of an eccentric housing 12.

In Fig. 3 ist eine Detailansicht des elektrischen Vibrationsantriebes 8 samt Exzentergehäuse 12 und Motorgehäuse 11 dargestellt. Im Exzentergehäuse 12 ist mittels Wälzlager 13 eine Exzenterwelle 14 drehbar gelagert. Auf der Exzenterwelle 14 sind die als Hydraulikzylinder 15, 16 ausgebildeten Beistellantriebe 7 gelagert. Auch hier kommen vorteilhafterweise Wälzlager zum Einsatz. Die Lagerung der Exzenterwelle 14 ist dabei ausreichend genau und stabil, um auch als einzige Lagerung eines Rotors 21 des Elektromotors 22 zu fungieren.In Fig. 3 a detailed view of the electric vibration drive 8 including the eccentric housing 12 and the motor housing 11 is shown. An eccentric shaft 14 is rotatably mounted in the eccentric housing 12 by means of roller bearings 13. The auxiliary drives 7 designed as hydraulic cylinders 15, 16 are mounted on the eccentric shaft 14. Rolling bearings are also advantageously used here. The mounting of the eccentric shaft 14 is sufficiently precise and stable to also function as the only mounting of a rotor 21 of the electric motor 22.

In der dargestellten Ausführungsform weist die Exzenterwelle 14 zwei Exzenter 17, 18 auf. Am ersten Exzenter 17 ist der erste Hydraulikzylinder 15 gelagert. Zur symmetrischen Kraftübertragung ist der zweite Exzenter 18 in zwei Abschnitte beidseits des ersten Exzenters 17 aufgeteilt. An diesem zweiten Exzenter 18 ist der zweite Hydraulikzylinder 16 mittels eines gabelförmigen Anschlusses gelagert.In the embodiment shown, the eccentric shaft 14 has two eccentrics 17, 18. The first hydraulic cylinder 15 is mounted on the first eccentric 17. For symmetrical power transmission, the second eccentric 18 is divided into two sections on both sides of the first eccentric 17. The second hydraulic cylinder 16 is mounted on this second eccentric 18 by means of a fork-shaped connection.

Bei einer nicht dargestellten alternativen Ausführung ist lediglich ein Exzenter vorgesehen, auf dem ein Übertragungselement in Form eines Pleuels angeordnet ist. Damit wird beispielsweise eine nach oben unten gerichtete Vibrationsbewegung erzeugt, die auf schräg angeordnete Beistellantriebe 7 übertragen wird. Die Stellung der Beistellantriebe 7 in Bezug auf das Übertragungselement bestimmt dabei die auf die Stopfwerkzeuge 5 übertragene Vibrationsamplitude.In an alternative embodiment not shown, only one eccentric is provided on which a transmission element in the form of a connecting rod is arranged. In this way, for example, a vibration movement directed upwards and downwards is generated, which is transmitted to auxiliary drives 7 arranged at an angle. The position of the auxiliary drives 7 in relation to the transmission element determines the vibration amplitude transmitted to the tamping tools 5.

Das Exzentergehäuse 12 ist mittels eines Dichtrings 19 gegenüber dem Motorgehäuse 11 abgedichtet. An einem dem Motorgehäuse 11 zugewandten Ende 20 der Exzenterwelle 14 ist der Rotor 21 des Elektromotors 22 angeordnet und formschlüssig mit der Exzenterwelle 14 verbunden. Die in Fig. 3 dargestellte formschlüssige Verbindung 23 ist als Schraubenverbindung ausgeführt, wobei der Rotor 21 mittels einer Zentrierung an der Exzenterwelle 14 positioniert ist.The eccentric housing 12 is sealed off from the motor housing 11 by means of a sealing ring 19. The rotor 21 of the electric motor 22 is arranged on an end 20 of the eccentric shaft 14 that faces the motor housing 11 and is connected to the eccentric shaft 14 in a form-fitting manner. In the Fig. 3 The positive connection 23 shown is designed as a screw connection, the rotor 21 being positioned on the eccentric shaft 14 by means of a centering.

Der Elektromotor 22 ist als Torquemotor ausgebildet. Die Dimensionierung ist dabei an die Ausführungsform des Stopfaggregats anpassbar. Bei gleichbleibendem Nenn-Drehmoment kann beispielsweise bei erweitertem Durchmesser die Bautiefe des Motors 22 reduziert werden. Damit ist auch die Wirkung des Rotors 21 als Schwungmasse optimierbar. Die kompakte Bauweise wird zudem durch das Entfallen einer separaten Lagerung für den Rotor 21 erreicht.The electric motor 22 is designed as a torque motor. The dimensions can be adapted to the embodiment of the tamping unit. With the same nominal torque, for example, with an extended The overall depth of the motor 22 can be reduced in diameter. The effect of the rotor 21 as a flywheel can thus also be optimized. The compact design is also achieved by eliminating the need for a separate bearing for the rotor 21.

Innerhalb des Motorgehäuses 11 ist ein Stator 24 des Elektromotors 22 angeordnet. Wichtig ist eine genaue Ausrichtung des Stators 24 gegenüber dem Rotor 21, um sowohl in Umfangsrichtung als auch in Längsrichtung einen gleichmäßigen Luftspalt sicherzustellen. Dies wird auf einfache Weise mittels einer Zentrierung 25 des Motorgehäuses 11 gegenüber dem Exzentergehäuse 12 erreicht.A stator 24 of the electric motor 22 is arranged within the motor housing 11. It is important that the stator 24 is precisely aligned with respect to the rotor 21 in order to ensure a uniform air gap both in the circumferential direction and in the longitudinal direction. This is achieved in a simple manner by means of a centering 25 of the motor housing 11 with respect to the eccentric housing 12.

Optional kann die Exzenterwelle 14 an einer dem Motorgehäuse 11 abgewandten Seite eine zusätzliche Schwungscheibe 26 aufweisen, um die Schwungmasse bei Bedarf weiter zu erhöhen. Zudem kann auf der Exzenterwelle 14 ein Drehgeber 27 zur Positionserkennung angeordnet sein.Optionally, the eccentric shaft 14 can have an additional flywheel 26 on a side facing away from the motor housing 11 in order to further increase the flywheel if required. In addition, a rotary encoder 27 for position detection can be arranged on the eccentric shaft 14.

Fig. 4 zeigt eine weitere Ausführungsvariante des am Exzentergehäuse 12 angeflanschten Motorgehäuses 11 eines als Torquemotor ausgeführten Elektromotors 22. Hier ist die formschlüssige Verbindung 23 als Außenverzahnung der Exzenterwelle 14 und Innenverzahnung einer mit dem Rotor 21 verbundenen Buchse ausgebildet. Fig. 4 shows a further embodiment of the motor housing 11 flanged to the eccentric housing 12 of an electric motor 22 designed as a torque motor. Here the positive connection 23 is designed as external teeth of the eccentric shaft 14 and internal teeth of a socket connected to the rotor 21.

Der Torquemotor weist eine geringe Bautiefe auf, welche sich positiv auf eine Einbaubreite des gesamten Stopfaggregates 1 auswirkt. Diese Bauform erlaubt eine besonders genaue Zentrierung des Rotors 21 gegenüber der Exzenterwelle 14 und des Motorgehäuses 11 samt Stator 24 gegenüber dem Exzentergehäuse 12.The torque motor has a small overall depth, which has a positive effect on the installation width of the entire tamping unit 1. This design allows a particularly precise centering of the rotor 21 with respect to the eccentric shaft 14 and the motor housing 11 together with the stator 24 with respect to the eccentric housing 12.

Das Motorgehäuse 11 ist in sich und gegenüber dem Exzentergehäuse abgedichtet, um eine Verschmutzung des Rotors 21 und des Stators 24 auszuschließen. Ein mittels Schrauben befestigter Deckel 30 des Motorgehäuses 11 ermöglicht eine rasche Inspektion des Elektromotors 22.The motor housing 11 is sealed in itself and with respect to the eccentric housing in order to prevent contamination of the rotor 21 and the stator 24. A cover 30 of the motor housing 11 fastened by means of screws enables a quick inspection of the electric motor 22.

Rund um das Motorgehäuse 11 sind Kühlkanäle 28 für eine Flüssigkeitskühlung angeordnet. Eine zusätzliche Kühlung bewirken rund um die Kühlkanäle 28 angeordnete Kühlrippen 29. Mittels einer nicht dargestellten Pumpe wird laufend Kühlflüssigkeit durch die Kühlkanäle 28 geleitet, um die im Betrieb entstehende Wärme abzuführen. Damit wird auch bei hohen Außentemperaturen und starker Sonneneinstrahlung ein Überhitzen des Elektromotors 22 zuverlässig verhindert.Cooling channels 28 for liquid cooling are arranged around the motor housing 11. Cooling fins 29 arranged around the cooling channels 28 cause additional cooling. By means of a pump (not shown), cooling liquid is continuously passed through the cooling channels 28 in order to dissipate the heat generated during operation. So will In the event of high outside temperatures and strong solar radiation, overheating of the electric motor 22 is reliably prevented.

Claims (10)

  1. A tamping unit (1) for tamping sleepers (2) of a track (3), having a lowerable tool carrier (4) and oppositely positioned tamping tools (5), wherein each tamping tool (5) is connected via a pivot arm (6) to a squeezing drive (7) for producing a squeezing motion and to an electric vibration drive (8) for producing a vibratory motion, characterized in that the electric vibration drive (8) comprises an eccentric shaft (14) which, together with a rotor (21) of an electric motor (22), is mounted merely in an eccenter housing (12), and that a stator (24) of the electric motor (22) with a motor housing (11) is flange-mounted to the eccenter housing (12).
  2. A tamping unit (1) according to claim 1, characterized in that the electric motor (22) is a torque motor designed as an internal rotor.
  3. A tamping unit (1) according to claim 1 or 2, characterized in that a water cooling is associated with the electric motor (22).
  4. A tamping unit (1) according to one of claims 1 to 3, characterized in that a form-fitting connection (23) to the rotor (21) is provided at an end (20), facing the motor housing (11), of the eccentric shaft (14).
  5. A tamping unit (1) according to claim 4, characterized in that the form-fitting connection (23) is designed as external teeth of the eccentric shaft (14) and internal teeth of a sleeve connected to the rotor (21).
  6. A tamping unit according to claim 4, characterized in that the form-fitting connection (23) is designed as a screw connection.
  7. A tamping unit (1) according to one of claims 1 to 6, characterized in that the motor housing (11) is sealed by means of a sealing ring (19) with respect to the eccenter housing (12) at a feed-through of the eccentric shaft (14).
  8. A tamping unit (1) according to one of claims 1 to 7, characterized in that the motor housing (11) is positioned relative to the eccenter housing (12) by means of a centering (25).
  9. A tamping unit (1) according to one of claims 1 to 8, characterized in that the eccentric shaft (14) has several eccentric sections, and that different eccentric sections are associated with the oppositely positioned tamping tools (5).
  10. A tamping unit (1) according to one of claims 1 to 8, characterized in that the eccentric shaft (14) has an eccentric section on which a transmission element (15) for transmitting the vibratory motion is mounted.
EP18727143.2A 2017-05-03 2018-04-05 Tamping unit for tamping sleepers of a track Active EP3619358B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL18727143T PL3619358T3 (en) 2017-05-03 2018-04-05 Tamping unit for tamping sleepers of a track

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1792017A AT519934B1 (en) 2017-05-03 2017-05-03 Stopfaggregat for clogging thresholds of a track
PCT/EP2018/058675 WO2018202380A1 (en) 2017-05-03 2018-04-05 Tamping unit for tamping sleepers of a track

Publications (2)

Publication Number Publication Date
EP3619358A1 EP3619358A1 (en) 2020-03-11
EP3619358B1 true EP3619358B1 (en) 2021-06-09

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EP18727143.2A Active EP3619358B1 (en) 2017-05-03 2018-04-05 Tamping unit for tamping sleepers of a track

Country Status (10)

Country Link
US (1) US11549220B2 (en)
EP (1) EP3619358B1 (en)
JP (1) JP7009507B2 (en)
CN (1) CN110621823B (en)
AT (1) AT519934B1 (en)
CA (1) CA3056023A1 (en)
EA (1) EA036812B1 (en)
ES (1) ES2884156T3 (en)
PL (1) PL3619358T3 (en)
WO (1) WO2018202380A1 (en)

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CN112538794A (en) * 2019-09-23 2021-03-23 中国铁建高新装备股份有限公司 Tamping device vibration part with cooling device and corresponding cooling method

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Publication number Publication date
US20210102344A1 (en) 2021-04-08
US11549220B2 (en) 2023-01-10
AT519934B1 (en) 2019-11-15
AT519934A1 (en) 2018-11-15
WO2018202380A1 (en) 2018-11-08
EP3619358A1 (en) 2020-03-11
CN110621823B (en) 2021-10-22
EA201900401A1 (en) 2020-03-03
PL3619358T3 (en) 2021-12-06
CN110621823A (en) 2019-12-27
EA036812B1 (en) 2020-12-23
JP7009507B2 (en) 2022-01-25
ES2884156T3 (en) 2021-12-10
CA3056023A1 (en) 2018-11-08
JP2020518744A (en) 2020-06-25

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