EP2561145B1 - Rotary device for an attachment on a machine - Google Patents

Rotary device for an attachment on a machine Download PDF

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Publication number
EP2561145B1
EP2561145B1 EP11714770.2A EP11714770A EP2561145B1 EP 2561145 B1 EP2561145 B1 EP 2561145B1 EP 11714770 A EP11714770 A EP 11714770A EP 2561145 B1 EP2561145 B1 EP 2561145B1
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EP
European Patent Office
Prior art keywords
stator
rotary
rotary device
duct
leadthrough
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EP11714770.2A
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German (de)
French (fr)
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EP2561145A2 (en
Inventor
Günter Holp
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Holp GmbH
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Holp GmbH
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
    • E02F3/36—Component parts
    • E02F3/3604—Devices to connect tools to arms, booms or the like
    • E02F3/3677—Devices to connect tools to arms, booms or the like allowing movement, e.g. rotation or translation, of the tool around or along another axis as the movement implied by the boom or arms, e.g. for tilting buckets
    • E02F3/3681—Rotators

Definitions

  • the invention relates to a rotating device for an attachment to a work machine with a arranged on a boom of the working machine rotator having a rotatably held preferably in a housing stator and preferably rotatable about the stator by means of a worm gear rotor, and with a sweeping through the rotator Rotary feedthrough for the passage of a pressure medium via at least one media channel.
  • Such rotating devices for mounting, for example, on a boom of a construction machine are known in the market.
  • the rotary feedthrough is formed in two parts from a non-rotatable outer cylinder and a core leading the media channel and inserted into the stator, which in turn has no media channels and serves as a rotary bearing only the rotor.
  • the publication EP 2 123 831 discloses a rotary device according to the preamble of the independent claim. The problem with this design is that the rotary feedthrough does not provide enough space to pass large amounts of oil through several channels.
  • the object of the invention is to improve the devices known from the prior art and to design them in such a way that a compact design with a low overall height and yet high pressure medium throughput is achieved.
  • the invention is based on the idea to use the stator at the same time for the rotary mounting of the rotor and the rotary feedthrough, wherein the stator and rotating device optionally as one-piece or one-piece
  • the at least one media channel has a first channel section guided through the stator and a second channel section which communicates therewith and continues via the rotary feedthrough.
  • the media channels can be conveniently passed axially and deflected radially to the rotary feedthrough out without special fits would be required.
  • This also allows large channel cross-sections realize, and it can be passed through sufficient pressure medium even at a reduced height, which also improves the leverage ratios and in particular the introduction of force into the implement.
  • the channel sections are each formed by two mutually perpendicular, with respect to the axis of rotation of the rotary feedthrough axially parallel and radially extending channel holes.
  • a further improvement can be achieved in that the radial channel bores are shut off in the stator at the radially outer end and are open to an axial internal opening of the stator. In principle, however, it is also possible with increased manufacturing effort to introduce the radial bores as blind holes.
  • the first and second channel portion of the at least one media channel are fluidly connected to each other via an annular groove preferably formed in the stator, so that even with a rotational movement, a pressure medium transport is possible.
  • a plurality of annular grooves for connecting each of a first and second channel portion may be axially offset from one another, wherein the annular grooves should be sealed against each other by Gleitdichtringe.
  • first channel section can be connected to a machine-side hydraulic supply via a feed block fixed to the stator, and if the second channel section can be connected to the device side via a distributor block placed on the rotary feedthrough.
  • the stator is formed of a preferably metallic, one-piece solid material body or one-piece composite body and has a plurality of hollow cylindrical sections of different outer diameter. In this way, a particularly favorable arrangement of the media channels is possible at the same time high bearing stiffness.
  • the stator forms an outer radial bearing for the outer rotor and an inner radial bearing for the inner rotary feedthrough, wherein the rotor and the rotary leadthrough are rotatably mounted coaxially to a common axis of rotation on the stator.
  • the rotor via a rotary driver with the rotary feedthrough is preferably rotatably connected together with rotary play. As a result, a synchronous rotation can be ensured even with bearing wear.
  • a further advantageous embodiment provides that the rotary feedthrough is rotatably mounted in the stator as a preferably one-piece, at least partially cylindrical core.
  • the rotary feedthrough has a central axial bore for the passage of electrical lines.
  • the rotor on the output side is preferably connectable via a quick-change device with a replaceable attachment, so that a particularly variable use is possible.
  • the worm wheel of the worm gear is rotatably mounted on an axial shoulder acting as a sliding guide of the stator.
  • an axial and / or radial rolling bearing is conceivable.
  • the rotating device 10 shown in the drawing comprises a housing 12, a rotator 14 disposed therein, and a rotary union 16 penetrating the rotator as a unit for conveying media to an attachment, not shown, such as an excavator bucket, a mill, or a hydraulic hammer.
  • an attachment not shown, such as an excavator bucket, a mill, or a hydraulic hammer.
  • the housing 12 has an upper mounting plate 18, on which there are connecting means for mounting on an excavator handle attach.
  • the mounting plate 18 also allows the housing-fixed rotationally secured fixation of a stator 20 of the rotator 14 by means of screws 22 on the circumference of the stator 20, a rotor 24 of the rotator 14 is rotatably mounted.
  • the rotor 24 has a worm wheel 26 and a flange ring 28 fixedly screwed thereto for the attachment-side fixing of, for example, a quick coupler for the attachment.
  • the worm wheel 26 meshes with a worm 30 which is drivable by means of motor 32.
  • the rotary feedthrough 16 is rotatably mounted coaxially in the stator 20.
  • a feed block 34 which can be fixed to the stator 20 for a machine-side pressure oil connection, while a distributor block 36 fitted from below onto the rotary feedthrough 16 enables a device-side pressure oil connection.
  • a synchronous rotation is achieved via a driver 38, which is only indicated symbolically, between distributor block 36 or rotary feedthrough 16 and rotor 24, so that a torsion-free hydraulic connection is ensured.
  • About the driver 38 can be produced by overcoming a rotational play a positive connection, so that even when the worm wheel 26 wear a blocking-free operative connection is possible.
  • each media channel 40 has a stator-side or first channel section 42 and a second channel section 44, which communicates therewith and runs in the rotary feedthrough 16.
  • These channel sections 42, 44 are fluidly connected to each other via an annular groove 46 formed in the hollow cylindrical stator 20.
  • Fig. 3 shows the mounting situation of the rotating device 10 on a bucket 48 by means of mounting flanges 50.
  • a Pivoting movement and about the rotating device 10 in addition a rotational movement of the quick coupler 54 possible, with it being possible, for example, attach a not shown bucket as an attachment with little handling effort.
  • a compact construction with a low overall height is achieved, so that an optimal force introduction and precise positioning of the attachment is possible.
  • the stator 20 is integrally or integrally formed of a solid material.
  • a hollow cylindrical and externally stepped cylindrical metal body 55 is used. This fulfills a dual bearing function as an inner race on an axially stepped slide bearing surface 56 for the rotor 24 and the worm wheel 26 and at the same time - via internal radial bearings 58, 58 '- as a rotary bearing for the inside co-rotating rotary feedthrough 16.
  • This is also one piece or in one piece formed a solid material and provided with a lower radially projecting annular flange 60 for support on thrust bearings 62.
  • the bearings 58, 58 ', 62 may be designed as plain bearings or roller bearings.
  • stator 20 it is possible for the stator 20 to have a bearing ring 57 fixedly connected to a central cylinder part, for example by shrinking or pressing, as shown in FIG Fig. 4 is illustrated by dashed lines.
  • stator 20 consists of two parts, but are rigidly connected as a one-piece composite body.
  • the one-piece or one-piece stator 20 additionally permits a particularly favorable arrangement of the first (stator-side) channel sections 42, which are formed by channel passages 42 'and radial channel bores 42 ", which are orthogonally intersecting with respect to the axis of rotation 64, and radial in the sense of a simplified production through channel holes 42 "are plugged at its outer end and open at the inner end in each case an annular groove 46.
  • the axially offset annular grooves 46 are by Gleitdichtringe 66 made of plastic against each other and axially outward sealed.
  • the radial bores 42 are distributed at least predominantly in the radially widened section of the stator 20, so that there is sufficient installation space for the clogging and for the annular grooves 46.
  • the latter can then also be made radially recessed, so that At the same time, a high medium pressure without pressure oil losses can be maintained by the one-piece or one-piece design of the stator 20 and the rotary feedthrough 16.
  • the rotary feedthrough 16 is provided with a central axial bore 68 provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Gear Transmission (AREA)

Description

Die Erfindung betrifft eine Drehvorrichtung für ein Anbaugerät an einer Arbeitsmaschine mit einem an einem Ausleger der Arbeitsmaschine angeordneten Rotator, der einen vorzugsweise in einem Gehäuse drehfest gehaltenen Stator und einen vorzugsweise mittels eines Schneckengetriebes um den Stator drehbaren Rotor aufweist, und mit einer durch den Rotator durchgreifenden Drehdurchführung zur Durchleitung eines Druckmediums über mindestens einen Medienkanal.The invention relates to a rotating device for an attachment to a work machine with a arranged on a boom of the working machine rotator having a rotatably held preferably in a housing stator and preferably rotatable about the stator by means of a worm gear rotor, and with a sweeping through the rotator Rotary feedthrough for the passage of a pressure medium via at least one media channel.

Solche Drehvorrichtungen zum Anbau beispielsweise an einen Ausleger einer Baumaschine sind am Markt bekannt. Die Drehdurchführung ist dabei zweiteilig aus einem drehfesten Außenzylinder und einem den Medienkanal führenden Kern ausgebildet und in den Stator eingesetzt, der seinerseits keine Medienkanäle aufweist und als Drehlagerung nur des Rotors dient. Die Druckschrift EP 2 123 831 offenbart eine Drehvorrichtung gemäß dem Oberbegriff des unabhängigen Anspruchs. Problematisch bei diesem Aufbau ist, dass die Drehdurchführung nicht genügend Bauraum bietet, um große Ölmengen über mehrere Kanäle durchzuleiten.Such rotating devices for mounting, for example, on a boom of a construction machine are known in the market. The rotary feedthrough is formed in two parts from a non-rotatable outer cylinder and a core leading the media channel and inserted into the stator, which in turn has no media channels and serves as a rotary bearing only the rotor. The publication EP 2 123 831 discloses a rotary device according to the preamble of the independent claim. The problem with this design is that the rotary feedthrough does not provide enough space to pass large amounts of oil through several channels.

Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, die im Stand der Technik bekannten Vorrichtungen zu verbessern und dabei so zu gestalten, dass ein kompakter Aufbau mit geringer Bauhöhe und dennoch hohem Druckmitteldurchsatz erreicht wird.Proceeding from this, the object of the invention is to improve the devices known from the prior art and to design them in such a way that a compact design with a low overall height and yet high pressure medium throughput is achieved.

Zur Lösung dieser Aufgabe wird die im Patentanspruch 1 angegebene Merkmalskombination vorgeschlagen. Vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung ergeben sich aus den abhängigen Ansprüchen.To solve this problem, the feature combination specified in claim 1 is proposed. Advantageous embodiments and modifications of the invention will become apparent from the dependent claims.

Die Erfindung geht von dem Gedanken aus, den Stator zugleich für die Drehlagerung des Rotors und der Drehdurchführung einzusetzen, wobei Stator und Drehvorrichtung gegebenenfalls als jeweils einteilige bzw. einstückigeThe invention is based on the idea to use the stator at the same time for the rotary mounting of the rotor and the rotary feedthrough, wherein the stator and rotating device optionally as one-piece or one-piece

(Verbund)-Körper ausgebildet sind. Demzufolge wird erfindungsgemäß vorgeschlagen, dass der mindestens eine Medienkanal einen durch den Stator hindurchgeführten ersten Kanalabschnitt und einen damit kommunizierenden, über die Drehdurchführung weitergeführten zweiten Kanalabschnitt aufweist. In dem Stator steht mehr Bauraum in radialer Richtung zur Verfügung, so dass die Medienkanäle günstig axial hindurchgeführt und radial zu der Drehdurchführung hin umgelenkt werden können, ohne dass besondere Passungen erforderlich wären. Damit lassen sich auch große Kanalquerschnitte realisieren, und es kann genügend Druckmedium auch bei verringerter Bauhöhe durchgeleitet werden, womit auch die Hebelverhältnisse und insbesondere die Krafteinleitung in das Arbeitsgerät verbessert werden.(Composite) body are formed. Accordingly, it is proposed according to the invention that the at least one media channel has a first channel section guided through the stator and a second channel section which communicates therewith and continues via the rotary feedthrough. In the stator more space in the radial direction is available, so that the media channels can be conveniently passed axially and deflected radially to the rotary feedthrough out without special fits would be required. This also allows large channel cross-sections realize, and it can be passed through sufficient pressure medium even at a reduced height, which also improves the leverage ratios and in particular the introduction of force into the implement.

Auch in herstellungstechnischer Hinsicht ist es besonders vorteilhaft, wenn die Kanalabschnitte jeweils durch zwei zueinander rechtwinklige, bezüglich der Drehachse der Drehdurchführung achsparallel und radial verlaufende Kanalbohrungen gebildet sind. Eine weitere Verbesserung lässt sich dadurch erzielen, dass die radialen Kanalbohrungen in dem Stator am radial äußeren Ende abgesperrt sind und zu einem axialen Innendurchbruch des Stators hin offen sind. Grundsätzlich ist es aber mit erhöhtem Fertigungsaufwand auch möglich, die Radialbohrungen als Sacklöcher einzubringen.Also in terms of manufacturing technology, it is particularly advantageous if the channel sections are each formed by two mutually perpendicular, with respect to the axis of rotation of the rotary feedthrough axially parallel and radially extending channel holes. A further improvement can be achieved in that the radial channel bores are shut off in the stator at the radially outer end and are open to an axial internal opening of the stator. In principle, however, it is also possible with increased manufacturing effort to introduce the radial bores as blind holes.

Vorteilhafterweise sind der erste und zweite Kanalabschnitt des mindestens einen Medienkanals über eine vorzugsweise in dem Stator ausgebildete Ringnut fluidisch miteinander verbunden, so dass auch bei einer Drehbewegung ein Druckmitteltransport möglich ist.Advantageously, the first and second channel portion of the at least one media channel are fluidly connected to each other via an annular groove preferably formed in the stator, so that even with a rotational movement, a pressure medium transport is possible.

In baulich vorteilhafter Weise können mehrere Ringnuten zur Verbindung jeweils eines ersten und zweiten Kanalabschnitts axial zueinander versetzt angeordnet sein, wobei die Ringnuten durch Gleitdichtringe gegeneinander abgedichtet sein sollten.In structurally advantageous manner a plurality of annular grooves for connecting each of a first and second channel portion may be axially offset from one another, wherein the annular grooves should be sealed against each other by Gleitdichtringe.

Von Vorteil ist es auch, wenn der erste Kanalabschnitt über einen an dem Stator fixierten Einspeiseblock an eine maschinenseitige Hydraulikversorgung anschließbar ist, und wenn der zweite Kanalabschnitt über einen auf die Drehdurchführung aufgesetzten Verteilerblock geräteseitig verbindbar ist.It is also advantageous if the first channel section can be connected to a machine-side hydraulic supply via a feed block fixed to the stator, and if the second channel section can be connected to the device side via a distributor block placed on the rotary feedthrough.

Gemäß einer besonders bevorzugten Ausgestaltung der Erfindung ist der Stator aus einem vorzugsweise metallischen, einteiligen Vollmaterialkörper oder einstückigen Verbundkörper gebildet und weist mehrere hohlzylindrische Abschnitte unterschiedlichen Außendurchmessers auf. Auf diese Weise wird bei gleichzeitig hoher Lagersteifigkeit eine besonders günstige Anordnung der Medienkanäle möglich.According to a particularly preferred embodiment of the invention, the stator is formed of a preferably metallic, one-piece solid material body or one-piece composite body and has a plurality of hollow cylindrical sections of different outer diameter. In this way, a particularly favorable arrangement of the media channels is possible at the same time high bearing stiffness.

Vorteilhafterweise bildet der Stator ein äußeres Radiallager für den außenliegenden Rotor und ein inneres Radiallager für die innenliegende Drehdurchführung, wobei der Rotor und die Drehdurchführung koaxial zu einer gemeinsamen Drehachse drehbar an dem Stator gelagert sind.Advantageously, the stator forms an outer radial bearing for the outer rotor and an inner radial bearing for the inner rotary feedthrough, wherein the rotor and the rotary leadthrough are rotatably mounted coaxially to a common axis of rotation on the stator.

Weiterhin ist es vorteilhaft, wenn der Rotor über einen Drehmitnehmer mit der Drehdurchführung vorzugsweise mit Drehspiel gemeinsam drehbar verbunden ist. Dadurch kann auch bei Lagerverschleiß eine synchrone Drehung sichergestellt werden.Furthermore, it is advantageous if the rotor via a rotary driver with the rotary feedthrough is preferably rotatably connected together with rotary play. As a result, a synchronous rotation can be ensured even with bearing wear.

Eine weitere vorteilhafte Ausführung sieht vor, dass die Drehdurchführung als vorzugsweise einteiliger, zumindest abschnittsweise zylindrischer Kern drehbar in dem Stator gelagert ist.A further advantageous embodiment provides that the rotary feedthrough is rotatably mounted in the stator as a preferably one-piece, at least partially cylindrical core.

Günstig ist es auch, wenn die Drehdurchführung eine zentrale Axialbohrung zur Durchführung von elektrischen Leitungen aufweist.It is also advantageous if the rotary feedthrough has a central axial bore for the passage of electrical lines.

Vorteilhafterweise ist der Rotor abtriebsseitig vorzugsweise über eine Schnellwechseleinrichtung mit einem auswechselbaren Anbaugerät verbindbar, so dass ein besonders variabler Einsatz möglich ist.Advantageously, the rotor on the output side is preferably connectable via a quick-change device with a replaceable attachment, so that a particularly variable use is possible.

Auch hinsichtlich der Kraft- bzw. Momentenaufnahme ist es von Vorteil, wenn das Schneckenrad des Schneckengetriebes auf einer als Gleitführung wirkenden Axialschulter des Stators drehbar gelagert ist. Grundsätzlich ist auch eine axiale und/oder radiale Wälzlagerung denkbar.Also with regard to the force or torque absorption, it is advantageous if the worm wheel of the worm gear is rotatably mounted on an axial shoulder acting as a sliding guide of the stator. Basically, an axial and / or radial rolling bearing is conceivable.

Im Folgenden wird die Erfindung anhand eines in der Zeichnung in schematischer Weise dargestellten Ausführungsbeispiels näher erläutert. Es zeigen

Fig. 1
eine Drehvorrichtung für ein Anbaugerät an einer Baumaschine in perspektivischer Ansicht;
Fig. 2
die Drehvorrichtung nach Fig. 1 in teilweise aufgebrochener perspektivischer Ansicht;
Fig. 3
einen Baggerstiel mit daran angebauter Drehvorrichtung und Schnellwechsler für ein Anbaugerät in perspektivischer Darstellung;
Fig. 4
einen Stator und eine darin drehbar gelagerte Drehdurchführung der Drehvorrichtung im Axialschnitt.
In the following the invention will be explained in more detail with reference to an embodiment shown schematically in the drawing. Show it
Fig. 1
a turning device for an attachment to a construction machine in a perspective view;
Fig. 2
the turning device after Fig. 1 in a partially broken perspective view;
Fig. 3
an excavator handle with attached thereto turning device and quick coupler for an attachment in a perspective view;
Fig. 4
a stator and a rotatably mounted therein rotary feedthrough of the rotating device in axial section.

Die in der Zeichnung dargestellte Drehvorrichtung 10 umfasst ein Gehäuse 12, einen darin angeordneten Rotator 14 und eine durch den Rotator durchgreifende Drehdurchführung 16 als Einheit zur Mediendurchführung an ein nicht gezeigtes Anbaugerät, beispielsweise eine Baggerlöffel, eine Fräse oder einen Hydraulikhammer. Damit ist es möglich, das nach Bedarf eingewechselte Anbaugerät drehbar zu machen und dabei gleichzeitig ein Hydrauliksystem mit Drucköl zu versorgen.The rotating device 10 shown in the drawing comprises a housing 12, a rotator 14 disposed therein, and a rotary union 16 penetrating the rotator as a unit for conveying media to an attachment, not shown, such as an excavator bucket, a mill, or a hydraulic hammer. This makes it possible to make the replaceable as needed attachment rotatable and at the same time to provide a hydraulic system with pressure oil.

Wie aus Fig. 1 und 2 ersichtlich, weist das Gehäuse 12 eine obere Anbauplatte 18 auf, an der sich Verbindungsmittel zur Montage an einem Baggerstiel anbringen lassen. Die Anbauplatte 18 ermöglicht auch die gehäusefeste verdrehgesicherte Fixierung eines Stators 20 des Rotators 14 mittels Schrauben 22. Umfangsseitig auf dem Stator 20 ist ein Rotor 24 des Rotators 14 drehbar gelagert. Der Rotor 24 weist ein Schneckenrad 26 und einen damit fest verschraubten Flanschring 28 zur abtriebsseitigen Fixierung beispielsweise eines Schnellwechslers für das Anbaugerät auf. Das Schneckenrad 26 kämmt mit einer Schnecke 30, die mittels Motor 32 antreibbar ist.How out Fig. 1 and 2 it can be seen, the housing 12 has an upper mounting plate 18, on which there are connecting means for mounting on an excavator handle attach. The mounting plate 18 also allows the housing-fixed rotationally secured fixation of a stator 20 of the rotator 14 by means of screws 22 on the circumference of the stator 20, a rotor 24 of the rotator 14 is rotatably mounted. The rotor 24 has a worm wheel 26 and a flange ring 28 fixedly screwed thereto for the attachment-side fixing of, for example, a quick coupler for the attachment. The worm wheel 26 meshes with a worm 30 which is drivable by means of motor 32.

Die Drehdurchführung 16 ist koaxial in dem Stator 20 drehbar gelagert. Über der Drehdurchführung 16 befindet sich ein an dem Stator 20 fixierbarer Einspeiseblock 34 für einen maschinenseitigen Druckölanschluss, während ein von unten auf die Drehdurchführung 16 aufgesetzter Verteilerblock 36 einen geräteseitigen Druckölanschluss ermöglicht. Dabei wird über einen nur symbolisch angedeuteten Mitnehmer 38 zwischen Verteilerblock 36 bzw. Drehdurchführung 16 und Rotor 24 eine synchrone Drehung erreicht, so dass eine verwindungsfreie Hydraulikverbindung sichergestellt ist. Über den Mitnehmer 38 lässt sich unter Überwindung eines Drehspiels ein Formschluss herstellen, so dass auch bei Abnutzung des Schneckenrads 26 eine blockierfreie Wirkverbindung möglich ist.The rotary feedthrough 16 is rotatably mounted coaxially in the stator 20. Above the rotary feedthrough 16 there is a feed block 34 which can be fixed to the stator 20 for a machine-side pressure oil connection, while a distributor block 36 fitted from below onto the rotary feedthrough 16 enables a device-side pressure oil connection. In this case, a synchronous rotation is achieved via a driver 38, which is only indicated symbolically, between distributor block 36 or rotary feedthrough 16 and rotor 24, so that a torsion-free hydraulic connection is ensured. About the driver 38 can be produced by overcoming a rotational play a positive connection, so that even when the worm wheel 26 wear a blocking-free operative connection is possible.

Um das Drucköl bzw. Druckmedium durchzuleiten, sind mehrere Medienkanäle 40 vorgesehen, die über den Einspeiseblock 34, den Stator 20, die Drehdurchführung 16 und den Verteilerblock 36 von oben nach unten durch die Drehvorrichtung 10 hindurchgehen. Dabei weist jeder Medienkanal 40 einen statorseitigen bzw. ersten Kanalabschnitt 42 und einen damit kommunizierenden, in der Drehdurchführung 16 verlaufenden zweiten Kanalabschnitt 44 auf. Diese Kanalabschnitte 42, 44 sind über eine in dem hohlzylindrischen Stator 20 innenseitig ausgebildete Ringnut 46 fluidisch miteinander verbunden.To pass the pressure oil or pressure medium, several media channels 40 are provided, which pass through the feed block 34, the stator 20, the rotary feedthrough 16 and the manifold block 36 from top to bottom through the rotating device 10. In this case, each media channel 40 has a stator-side or first channel section 42 and a second channel section 44, which communicates therewith and runs in the rotary feedthrough 16. These channel sections 42, 44 are fluidly connected to each other via an annular groove 46 formed in the hollow cylindrical stator 20.

Fig. 3 zeigt die Montagesituation der Drehvorrichtung 10 an einem Baggerstiel 48 mittels Anbauflanschen 50. Dabei wird über eine Kinematik 52 eine Schwenkbewegung und über die Drehvorrichtung 10 zusätzlich eine Drehbewegung an dem Schnellwechsler 54 möglich, wobei sich dort beispielsweise ein nicht gezeigter Baggerlöffel als Anbaugerät mit geringem Handhabungsaufwand anbringen lässt. Durch die nachstehend näher erläuterte besondere Ausgestaltung des Stators 20 und Anordnung der Medienkanäle 40 wird ein kompakter Aufbau mit geringer Bauhöhe erreicht, so dass eine optimale Krafteinleitung und präzise Positionierung des Anbaugeräts möglich ist. Fig. 3 shows the mounting situation of the rotating device 10 on a bucket 48 by means of mounting flanges 50. In this case, via a kinematics 52 a Pivoting movement and about the rotating device 10 in addition a rotational movement of the quick coupler 54 possible, with it being possible, for example, attach a not shown bucket as an attachment with little handling effort. Through the particular embodiment of the stator 20 explained in more detail below and arrangement of the media channels 40, a compact construction with a low overall height is achieved, so that an optimal force introduction and precise positioning of the attachment is possible.

Wie aus Fig. 4 ersichtlich, ist der Stator 20 einteilig bzw. einstückig aus einem Vollmaterial gebildet. Zweckmäßig wird ein innen hohlzylindrischer und außen abgestuft zylindrischer Metallkörper 55 eingesetzt. Dieser erfüllt eine doppelte Lagerfunktion als Innenlaufring an einer axial abgestuften Gleitlagerfläche 56 für den Rotor 24 bzw. das Schneckenrad 26 und zugleich - über innenliegende Radiallager 58, 58' - als Drehlagerung für die innen mitrotierende Drehdurchführung 16. Diese ist ebenfalls einteilig bzw. einstückig aus einem Vollmaterial gebildet und mit einem unteren radial überstehenden Ringflansch 60 zur Abstützung an Axiallagern 62 versehen. Die Lager 58, 58', 62 können als Gleitlager oder Wälzlager ausgeführt sein.How out Fig. 4 can be seen, the stator 20 is integrally or integrally formed of a solid material. Suitably, a hollow cylindrical and externally stepped cylindrical metal body 55 is used. This fulfills a dual bearing function as an inner race on an axially stepped slide bearing surface 56 for the rotor 24 and the worm wheel 26 and at the same time - via internal radial bearings 58, 58 '- as a rotary bearing for the inside co-rotating rotary feedthrough 16. This is also one piece or in one piece formed a solid material and provided with a lower radially projecting annular flange 60 for support on thrust bearings 62. The bearings 58, 58 ', 62 may be designed as plain bearings or roller bearings.

Grundsätzlich ist es möglich, dass der Stator 20 einen beispielsweise durch Einschrumpfen oder Pressen fest mit einem zentralen Zylinderteil verbundenen Lagerring 57 aufweist, wie es in Fig. 4 durch gestrichelte Linien veranschaulicht ist. In diesem Fall besteht der Stator 20 zwar aus zwei Teilen, die aber als einstückiger Verbundkörper starr verbunden sind.In principle, it is possible for the stator 20 to have a bearing ring 57 fixedly connected to a central cylinder part, for example by shrinking or pressing, as shown in FIG Fig. 4 is illustrated by dashed lines. In this case, although the stator 20 consists of two parts, but are rigidly connected as a one-piece composite body.

Der einteilige bzw. einstückige Stator 20 erlaubt zudem eine besonders günstige Anordnung der ersten (statorseitigen) Kanalabschnitte 42, die durch sich rechtwinklig kreuzende, bezüglich der Drehachse 64 achsparallele Kanalbohrungen 42' und radiale Kanalbohrungen 42" gebildet sind. Die im Sinne einer vereinfachten Herstellung radial durchgehenden Kanalbohrungen 42" sind an ihrem äußeren Ende abgestopft und münden am inneren Ende in jeweils eine Ringnut 46. Die axial versetzt angeordneten Ringnuten 46 sind durch Gleitdichtringe 66 aus Kunststoff gegeneinander und axial nach außen abgedichtet. Hierbei ist es vorteilhaft, wenn die Radialbohrungen 42" zumindest überwiegend in dem radial erweiterten Abschnitt des Stators 20 verteilt sind, so dass genügend Bauraum für die Abstopfungen und für die Ringnuten 46 zur Verfügung steht. Letztere können dann auch radial vertieft ausgeführt werden, so dass bei reduzierter axialer Höhe dennoch ein hoher Drucköldurchsatz erreicht wird. Zugleich kann durch die einteilige bzw. einstückige Ausbildung des Stators 20 und der Drehdurchführung 16 ein hoher Mediendruck ohne Druckölverluste aufrechterhalten werden. Um zusätzlich auch elektrische Leitungen durchzuführen, ist die Drehdurchführung 16 mit einer zentralen Axialbohrung 68 versehen.The one-piece or one-piece stator 20 additionally permits a particularly favorable arrangement of the first (stator-side) channel sections 42, which are formed by channel passages 42 'and radial channel bores 42 ", which are orthogonally intersecting with respect to the axis of rotation 64, and radial in the sense of a simplified production through channel holes 42 "are plugged at its outer end and open at the inner end in each case an annular groove 46. The axially offset annular grooves 46 are by Gleitdichtringe 66 made of plastic against each other and axially outward sealed. In this case, it is advantageous if the radial bores 42 "are distributed at least predominantly in the radially widened section of the stator 20, so that there is sufficient installation space for the clogging and for the annular grooves 46. The latter can then also be made radially recessed, so that At the same time, a high medium pressure without pressure oil losses can be maintained by the one-piece or one-piece design of the stator 20 and the rotary feedthrough 16. In order to additionally carry electrical lines, the rotary feedthrough 16 is provided with a central axial bore 68 provided.

Bei Einsatz eines Lagerrings 57 ist es möglich, auf Abstopfungen der Radialbohrungen 42" zu verzichten und diese stattdessen durch die Innenwandung des Lagerrings 57 oder gegebenenfalls durch eine eingepresste Kugel (nicht gezeigt) radial abzusperren. Denkbar ist es in diesem Zusammenhang auch, die Radialbohrungen 42" von innen her beispielsweise durch Erodieren als Sackloch auszuführen.When using a bearing ring 57, it is possible to dispense with blockage of the radial bores 42 "and to block them radially instead by the inner wall of the bearing ring 57 or optionally by a pressed-in ball (not shown) "Execute from the inside, for example, by eroding as a blind hole.

Claims (14)

  1. Rotary device for an attachment for a working machine, with a rotator (14) which has a stator (20), preferably held fixedly in terms of rotation in a housing (12), and a rotor (24), preferably rotatable about the stator (20) by means of a worm gear (26, 30), with a rotary leadthrough (16) for leading through a pressure medium via at least one media duct (40), the at least one media duct (40) having a first duct portion (42), led through the stator (20), and a second duct portion (44), communicating therewith and led further on via the rotary leadthrough (16), characterized in that the rotary leadthrough (16) passing through the rotator (14) is rotatably mounted as an at least partially cylindrical core in the stator (20).
  2. Rotary device according to Claim 1, characterized in that the duct portions (42, 44) are formed in each case by two duct bores (42', 42"; 44', 44") which are at right angles to one another and which run axially parallel and radially with respect to the axis of rotation (64) of the rotary leadthrough (16).
  3. Rotary device according to Claim 2, characterized in that the radial duct bores (42") in the stator (20) are shut off at the radially outer end and are open towards an axial inner perforation of the stator (20).
  4. Rotary device according to one of Claims 1 to 3, characterized in that the first and the second duct portion (42, 44) of the at least one media duct (40) are connected to one another fluidically via an annular groove (46) preferably formed in the stator (20).
  5. Rotary device according to one of Claims 1 to 4, characterized in that a plurality of annular grooves (46) in each case for connecting a first and a second duct portion (42, 44) are arranged so as to be offset axially to one another, and in that the annular grooves (46) are sealed off with respect to one another by means of sliding sealing rings (66).
  6. Rotary device according to one of Claims 1 to 5, characterized in that the first duct portion (42) is connectable to a machine-side hydraulic supply via a feed block (34) fixed to the stator (20), and in that the second duct portion (44) is connectable on the attachment side via a distributor block (36) placed onto the rotary leadthrough (16).
  7. Rotary device according to one of Claims 1 to 6, characterized in that the stator (20) is formed from a preferably metallic one-part solid material body or one-piece composite body.
  8. Rotary device according to one of Claims 1 to 7, characterized in that the stator (20) has a plurality of hollow-cylindrical portions of different outside diameter.
  9. Rotary device according to one of Claims 1 to 8, characterized in that the stator (20) has an outer radial bearing (56) for the external rotor (24) and an inner radial bearing (58, 58') for the internal rotary leadthrough (16), the rotor (24) and the rotary leadthrough (16) being rotatably mounted on the stator (20) coaxially to a common axis of rotation (64).
  10. Rotary device according to one of Claims 1 to 9, characterized in that the rotor (24) is connected jointly rotatably to the rotary leadthrough (16), preferably with rotational play, via a rotary driver (38).
  11. Rotary device according to one of Claims 1 to 10, characterized in that the rotary leadthrough (16) is rotatably mounted as a one-part core in the stator (20).
  12. Rotary device according to one of Claims 1 to 11, characterized in that the rotary leadthrough (16) has a central axial bore (68) for leading through electrical lines.
  13. Rotary device according to one of Claims 1 to 12, characterized in that the rotor (24) is connectable on the output side, preferably via a quick-change arrangement (54), to an exchangeable attachment.
  14. Rotary device according to one of Claims 1 to 13, characterized in that the worm wheel (26) of the worm gear (26, 30) is mounted rotatably on an axial shoulder, acting as a sliding guide of the stator (20).
EP11714770.2A 2010-04-17 2011-04-15 Rotary device for an attachment on a machine Active EP2561145B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE201010027895 DE102010027895A1 (en) 2010-04-17 2010-04-17 Turning device for an attachment to a work machine
PCT/EP2011/055977 WO2011128427A2 (en) 2010-04-17 2011-04-15 Rotary device for an attachment on a machine

Publications (2)

Publication Number Publication Date
EP2561145A2 EP2561145A2 (en) 2013-02-27
EP2561145B1 true EP2561145B1 (en) 2014-06-11

Family

ID=44063456

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11714770.2A Active EP2561145B1 (en) 2010-04-17 2011-04-15 Rotary device for an attachment on a machine

Country Status (3)

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EP (1) EP2561145B1 (en)
DE (1) DE102010027895A1 (en)
WO (1) WO2011128427A2 (en)

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Publication number Priority date Publication date Assignee Title
IT201800003146A1 (en) * 2018-02-28 2019-08-28 Fives Oto Spa Rotating hydraulic joint

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DE202011108526U1 (en) * 2011-11-30 2013-03-01 Kinshofer Gmbh Rotary / swivel drive for excavator attachment tools with quick coupler
DE102012019250A1 (en) * 2012-09-28 2014-04-03 Ludwig Ehrhardt Gmbh Lathe
DE102013206574A1 (en) 2013-04-12 2014-10-16 Holp Gmbh rotator
WO2015155627A1 (en) * 2014-04-10 2015-10-15 Ala Officine S.P.A. Multipath fluidic rotary distributor
DE102015107595A1 (en) * 2015-05-13 2016-11-17 Dr. Walter Hunger Beteiligungs GmbH & Co. Besitz KG Stator for a rotary feedthrough and production of a stator
DE102020121740A1 (en) 2020-08-19 2022-02-24 Holp Gmbh turning device
DE102022103669A1 (en) 2022-02-16 2023-08-17 Holp Gmbh turning device
DE102022120932A1 (en) 2022-08-18 2024-02-29 Kiesel Technology Gmbh Attachment device for an excavator arm

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DE2838428C2 (en) * 1978-09-02 1984-05-24 Fa. Heinz Thumm, 7012 Fellbach Rotating device for hanging loads
DE3146693A1 (en) * 1981-11-25 1983-06-01 Heinz Thumm Ölhydraulische Antriebe GmbH, 7012 Fellbach Rotary mechanism, in particular for gripping and lifting members on excavators and cranes
DE3146695A1 (en) * 1981-11-25 1983-07-07 Heinz Thumm Ölhydraulische Antriebe GmbH, 7012 Fellbach HYDROMOTOR, ESPECIALLY FOR GRIPPER TURNING DEVICE ON EXCAVATORS OR CRANES
DE3146696A1 (en) * 1981-11-25 1983-06-01 Heinz Thumm Ölhydraulische Antriebe GmbH, 7012 Fellbach Rotary mechanism for an excavator grab
DE202004019909U1 (en) * 2004-12-23 2006-04-27 Heinz Thumm Ölhydraulische Antriebe GmbH Turning device for load handling devices
DE102008025026A1 (en) * 2008-05-24 2009-11-26 MTS Gesellschaft für Maschinentechnik und Sonderbauten mbH Excavator accessory
ATE513125T1 (en) * 2008-08-29 2011-07-15 Baltrotors Sia PISTON LATHE

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800003146A1 (en) * 2018-02-28 2019-08-28 Fives Oto Spa Rotating hydraulic joint

Also Published As

Publication number Publication date
WO2011128427A2 (en) 2011-10-20
WO2011128427A3 (en) 2011-12-29
EP2561145A2 (en) 2013-02-27
DE102010027895A1 (en) 2011-10-20

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