EP0809735B1 - Slewing mechanism for an excavator grab - Google Patents
Slewing mechanism for an excavator grab Download PDFInfo
- Publication number
- EP0809735B1 EP0809735B1 EP96902986A EP96902986A EP0809735B1 EP 0809735 B1 EP0809735 B1 EP 0809735B1 EP 96902986 A EP96902986 A EP 96902986A EP 96902986 A EP96902986 A EP 96902986A EP 0809735 B1 EP0809735 B1 EP 0809735B1
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- EP
- European Patent Office
- Prior art keywords
- bearing
- stator
- rotor
- accordance
- bearings
- 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
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Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C3/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith and intended primarily for transmitting lifting forces to loose materials; Grabs
- B66C3/005—Grab supports, e.g. articulations; Oscillation dampers; Orientation
-
- 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
Definitions
- the invention relates to a device for rotation one connected to the boom of an excavator or crane Gripper or the like tool with a the cantilever-connected stator, one with the gripper connectable to the stator by means of a bearing arrangement a vertical axis rotatably mounted rotor, with a arranged between stator and rotor, by over two stator connections from the stator, through liquid-tight rotating unions and through one connected to the rotor, if necessary, in a rotationally fixed manner Hydraulic ducts with hydraulic oil that pass through the distributor Actuable hydraulic drive mechanism and with at least two via stator-side connections through the stator and through liquid-tight rotating unions through to and through the rotor hydraulic channels to the rotor-side connections, preferably for hydraulic gripper actuation.
- a device for rotation is already known from DE-A-2 838 346 known.
- a rotating device of this type is also known (EP-B-0 080 670), with the bearing arrangement inside the rotating device is arranged that for their maintenance Stator, rotor and drive mechanism completely must be disassembled. It also results in the known design, a relatively large height with a correspondingly large weight.
- the invention is based on the object the known rotary devices of the beginning specified type to improve that at a compact flat design maintenance especially in the Area of bearing arrangements and wearing parts is simplified.
- the solution according to the invention is based on the idea that the entire bearing assembly is radially outside of the drive mechanism arranged essentially at its height is.
- the bearing assembly be radially outside of the drive mechanism at its level on inner part of the device (stator or rotor) radially outwardly protruding collar and one on the external part of the device (rotor or stator) arranged, encompassing the bearing ring in a form-fitting manner, has radially inwardly open bearing groove, wherein between Bearing ring and bearing groove as roller bearings and / or Plain bearings and / or hydrostatic bearings trained bearing elements are inserted or molded.
- the external device part in the area the bearing groove appropriately formed in two parts.
- An advantageous embodiment of the invention provides before that between the bearing collar and bearing groove two thrust bearings and a radial bearing are arranged, at least one of the thrust bearings as a roller bearing, preferably can be designed as a needle bearing, while the other Thrust bearings as plain bearings or as hydrostatic bearings can be trained.
- Another embodiment provides that between Bearing ring and bearing groove two angular bearings arranged are as roller bearings, preferably as tapered roller bearings or ball bearings can be formed. Basically, it is also possible to use the angular bearings as To design plain bearings or as a hydrostatic bearing.
- a third variant of the invention provides before that the bearing ring and the bearing groove complementary curved bearing surfaces for receiving a plain bearing or have a hydrostatic bearing.
- the Stator has the bearing ring and the rotor has the bearing groove.
- a further relief in the maintenance of the turning device can be achieved in that at least one Part of the from the stator via the rotating unions to the rotor leading hydraulic channels the drive mechanism and the bearing arrangement penetrates centrally and that a in the assembled state of the stator, rotor and drive mechanism from the outside for access at least to some of the rotary unions and / or to Distributors and their seals accessible through a Locking piece lockable central axis assembly opening is provided.
- the assembly opening basically can also be arranged on the stator side , it is advantageous to place them on the gripper side Arrange the front of the rotor.
- the drive mechanism is preferably a hydraulic one Axial or radial piston engine, wherein the bearing rim at the level of the drive piston or -balls is arranged.
- Another embodiment variant provides that the Drive mechanism as a hydraulic rotary vane motor is formed, the bearing rim at the level of Swivel wing is arranged.
- the drive motor as a hydrostatic internal gear motor or Inner rotor is formed, the bearing ring on the height of the motor gear is arranged.
- the turning device shown in the drawing are intended for excavator grapples where high tensile, compressive and moment loads occur. They essentially exist from a with an excavator boom, not shown connectable stator 1, one with the stator via a rotary connection 4 connected rotor 6, on the an excavator grab, not shown, can be attached, and a drive mechanism acting between the stator and rotor 6 8th.
- the rotary connection 4 has in the exemplary embodiments 1 to 5 one at the level of the drive mechanism 8 projecting radially on the stator 1 Bearing ring 40 and one arranged on the rotor, the Bearing ring 40 encompassing a form-fitting, radial to inside open bearing groove 42, between the bearing ring 40 and bearing groove 42 different, as roller bearings, plain bearings or hydrostatic bearings trained bearing elements are inserted or molded.
- an upper axial between bearing ring 40 and bearing groove 42 Needle bearing 44, a radial needle bearing 46 and a Lower axial slide bearing 48 is provided.
- the embodiment 2 is the radial one on the right Needle bearing 46 replaced by a plain bearing 46 ', while in the embodiment variant shown in the left area of FIG. 2 the lower slide bearing 48 by a needle bearing 48 'is replaced.
- FIG Bearing ring 40 and the bearing groove 42 complementary to each other curved bearing surfaces it is also possible in the sense of FIG Bearing ring 40 and the bearing groove 42 complementary to each other curved bearing surfaces to accommodate a to provide correspondingly curved plain bearing 58.
- the Slide bearings 46 ', 48 and 58 can in principle also be used as Hydrostatic bearings are trained.
- the hydraulic channels 65 ', 65 "on the rotor side lead to rotor-side connections 66 ', 66' 'to which, if necessary with the interposition of one with the rotor Screws 67 and driver pin 68 connectable Connection adapter hydraulic lines for gripper actuation can be connected.
- the rotary unions for the Gripper hydraulics are in the embodiments shown by two the stator 1 and the rotor 6 centrally and coaxially penetrating pipe sections 32, 33 are formed, with their ends in the stator side or rotor side Step holes 19 and 69 engage and float there are stored.
- a floating radial distributor 70 is also provided, of the pipe sections 32, 33 of the rotary union 30 is accessed centrally.
- the rotary unions 30 are with their pipe sections 32, 33 and their sealing rings even when assembled Stator, rotor and drive mechanism from the outside forth about a closable by a closure piece 90 Assembly opening 91 accessible.
- the closure piece 90 has an axial bore forming the assembly opening 91 of the rotor can be used liquid-tight Pin 92 on the ring flange 93, screws 94 and driver pins 95 can be attached to the rotor 6.
- On the inside of the closure piece 90 has one open to the interior of the device and coaxial to the axis of rotation Blind hole or stepped bore 69 for receiving the one end of the pipe sections 32, 33. Also points the closure piece 90 the two to the rotor side Connections 66 ', 66 "for the gripper hydraulics leading Channel sections 65 ', 65 ", one of which essentially axially central and the other eccentrically arranged is.
- Figs. 1 and 2 included a drive mechanism designed as an axial piston drive 8, which is a plurality of on one Incorporation of the stator 1 at equal distances from each other arranged axial pressure cylinder 101, in which one piston 102 each and one against the end face of the Piston 102 abutting, through a cylinder opening more or less far reaching ball 103 is arranged are.
- the pistons 102 are on the back with Hydraulic fluid acts on the hydraulic channels 104 enters the impression cylinder 101.
- the Balls 103 lie with their out of the cylinder opening protruding part against that along an incircle of the rotor with undulating cam track 106 axial deflections.
- the cam track determines too the stroke of the pistons 102 at any time.
- Axial piston drive can also be a radial piston drive, a rotary leaf drive or a hydraulic internal gear drive (Inner rotor) as drive mechanism 8 be used.
- the invention refers to a device for rotation one connected to the boom of an excavator or crane Gripper or the like tool.
- the turning device has a stator 1, one on the stator 1 by means of a bearing arrangement 4 about a vertical axis rotatably mounted rotor 6, one between the stator and Hydraulic drive mechanism 8 arranged in the rotor and at least two rotary unions 30 for the gripper actuation on.
- a compact design with less Ensuring height is according to the invention suggested that the entire bearing assembly 4 radially arranged outside the drive mechanism at its level is.
- the bearing arrangement 4 expediently has one protruding radially outward on the stator 1 like a collar Bearing ring 40 and a bearing ring arranged on the rotor 6 40 form-fitting, radially inward open bearing groove 42. Between the bearing ring and the bearing groove are designed as roller bearings and / or plain bearings Bearing elements inserted or molded.
Abstract
Description
Die Erfindung betrifft eine Vorrichtung für die Drehung eines mit dem Ausleger eines Baggers oder Krans verbundenen Greifers oder dergleichen Werkzeugs mit einem mit dem Ausleger verbindbaren Stator, einem mit dem Greifer verbindbaren, am Stator mittels einer Lageranordnung um eine vertikale Achse drehbar gelagerten Rotor, mit einem zwischen Stator und Rotor angeordneten, durch über zwei von statorseitigen Anschlüssen aus den Stator, durch flüssigkeitsdichte Drehdurchführungen und durch einen gegebenenfalls mit dem Rotor drehfest verbundenen Verteiler hindurchgeführte Hydraulikkanäle mit Hydrauliköl beaufschlagbaren hydraulischen Antriebsmechanismus und mit mindestens zwei über statorseitige Anschlüsse durch den Stator und durch flüssigkeitsdichte Drehdurchführungen hindurch zum Rotor und durch diesen hindurch zu rotorseitigen Anschlüssen geführten Hydraulikkanälen, vorzugsweise für die hydraulische Greiferbetätigung. Eine derartige Vorrichtung ist bereits aus der DE-A-2 838 346 bekannt.The invention relates to a device for rotation one connected to the boom of an excavator or crane Gripper or the like tool with a the cantilever-connected stator, one with the gripper connectable to the stator by means of a bearing arrangement a vertical axis rotatably mounted rotor, with a arranged between stator and rotor, by over two stator connections from the stator, through liquid-tight rotating unions and through one connected to the rotor, if necessary, in a rotationally fixed manner Hydraulic ducts with hydraulic oil that pass through the distributor Actuable hydraulic drive mechanism and with at least two via stator-side connections through the stator and through liquid-tight rotating unions through to and through the rotor hydraulic channels to the rotor-side connections, preferably for hydraulic gripper actuation. Such a device is already known from DE-A-2 838 346 known.
Ferner ist eine Drehvorrichtung dieser Art bekannt (EP-B-0 080 670), bei der die Lageranordnung so im Inneren der Drehvorrichtung angeordnet ist, daß für deren Wartung Stator, Rotor und Antriebsmechanismus vollständig auseinandergebaut werden müssen. Außerdem ergibt sich bei der bekannten Bauweise eine relativ große Bauhöhe mit einem entsprechend großen Gewicht. A rotating device of this type is also known (EP-B-0 080 670), with the bearing arrangement inside the rotating device is arranged that for their maintenance Stator, rotor and drive mechanism completely must be disassembled. It also results in the known design, a relatively large height with a correspondingly large weight.
Ausgehend hiervon liegt der Erfindung die Aufgabe zugrunde, die bekannten Drehvorrichtungen der eingangs angegebenen Art dahingehend zu verbessern, daß bei einer kompakten flachen Bauweise die Wartung vor allem im Bereich der Lageranordnungen und der Verschleißteile vereinfacht wird.Proceeding from this, the invention is based on the object the known rotary devices of the beginning specified type to improve that at a compact flat design maintenance especially in the Area of bearing arrangements and wearing parts is simplified.
Zur Lösung dieser Aufgabe werden die im Kennzeichen des Patentanspruchs
1 angegebenen Merkmale vorgeschlagen. Vorteilhafte Ausgestaltungen
und Weiterbildungen der Erfindung ergeben
sich aus den abhängigen Ansprüchen.To solve this problem are in the characterizing part of the
Die erfindungsgemäße Lösung geht von dem Gedanken aus, daß die gesamte Lageranordnung radial außerhalb des Antriebsmechanismus im wesentlichen auf dessen Höhe angeordnet ist. Um dies zu erreichen, wird gemäß der Erfindung vorgeschlagen, daß die Lageranordnung radial außerhalb des Antriebsmechanismus auf dessen Höhe einen am inneren Vorrichtungsteil (Stator oder Rotor) radial nach außen bundartig überstehenden Lagerkranz und eine am außenliegenden Vorrichtungsteil (Rotor oder Stator) angeordnete, den Lagerkranz formschlüssig umfassende, radial nach innen offene Lagernut aufweist, wobei zwischen Lagerkranz und Lagernut als Wälzlager und/oder Gleitlager und/oder Hydrostatiklager ausgebildete Lagerelemente eingelegt oder eingformt sind. Aus Montagegründen ist das außenliegende Vorrichtungsteil im Bereich der Lagernut zweckmäßig zweigeteilt ausgebildet.The solution according to the invention is based on the idea that the entire bearing assembly is radially outside of the drive mechanism arranged essentially at its height is. To achieve this, according to the invention suggested that the bearing assembly be radially outside of the drive mechanism at its level on inner part of the device (stator or rotor) radially outwardly protruding collar and one on the external part of the device (rotor or stator) arranged, encompassing the bearing ring in a form-fitting manner, has radially inwardly open bearing groove, wherein between Bearing ring and bearing groove as roller bearings and / or Plain bearings and / or hydrostatic bearings trained bearing elements are inserted or molded. For assembly reasons is the external device part in the area the bearing groove appropriately formed in two parts.
Eine vorteilhafte Ausgestaltung der Erfindung sieht vor, daß zwischen Lagerkranz und Lagernut zwei Axiallager und ein Radiallager angeordnet sind, wobei zumindest eines der Axiallager als Wälzlager, vorzugsweise als Nadellager ausgebildet sein kann, während das andere Axiallager als Gleitlager oder als Hydrostatiklager ausgebildet sein kann.An advantageous embodiment of the invention provides before that between the bearing collar and bearing groove two thrust bearings and a radial bearing are arranged, at least one of the thrust bearings as a roller bearing, preferably can be designed as a needle bearing, while the other Thrust bearings as plain bearings or as hydrostatic bearings can be trained.
Eine weitere Ausführungsvariante sieht vor, daß zwischen Lagerkranz und Lagernut zwei Schräglager angeordnet sind, die als Wälzlager, vorzugsweise als Kegelrollenlager oder Kugellager ausgebildet sein können. Grundsätzlich ist es möglich, die Schräglager auch als Gleitlager oder als Hydrostatiklager auszubilden.Another embodiment provides that between Bearing ring and bearing groove two angular bearings arranged are as roller bearings, preferably as tapered roller bearings or ball bearings can be formed. Basically, it is also possible to use the angular bearings as To design plain bearings or as a hydrostatic bearing.
Eine dritte Ausgestaltungsvariante der Erfindung sieht vor, daß der Lagerkranz und die Lagernut komplementär gekrümmte Lagerflächen zur Aufnahme eines Gleitlagers oder eines Hydrostatiklagers aufweisen.A third variant of the invention provides before that the bearing ring and the bearing groove complementary curved bearing surfaces for receiving a plain bearing or have a hydrostatic bearing.
Weiter hat es sich als vorteilhaft erwiesen, wenn der Stator den Lagerkranz und der Rotor die Lagernut aufweist.It has also proven to be advantageous if the Stator has the bearing ring and the rotor has the bearing groove.
Eine weitere Erleichterung bei der Wartung der Drehvorrichtung kann dadurch erzielt werden, daß zumindest ein Teil der vom Stator über die Drehdurchführungen zum Rotor führenden Hydraulikkanäle den Antriebsmechanismus und die Lageranordnung zentral durchsetzt und daß eine im zusammenmontierten Zustand von Stator, Rotor und Antriebsmechanismus von außen her für den Zugriff zumindest zu einem Teil der Drehdurchführungen und/oder zum Verteiler und deren Dichtungen zugängliche, durch ein Verschlußstück verschließbare achszentrale Montageöffnung vorgesehen ist. Obwohl die Montageöffnung grundsätzlich auch auf der Statorseite angeordnet werden kann, ist es vorteilhaft, sie auf der greiferseitigen Stirnseite des Rotors anzuordnen.A further relief in the maintenance of the turning device can be achieved in that at least one Part of the from the stator via the rotating unions to the rotor leading hydraulic channels the drive mechanism and the bearing arrangement penetrates centrally and that a in the assembled state of the stator, rotor and drive mechanism from the outside for access at least to some of the rotary unions and / or to Distributors and their seals accessible through a Locking piece lockable central axis assembly opening is provided. Although the assembly opening basically can also be arranged on the stator side , it is advantageous to place them on the gripper side Arrange the front of the rotor.
Der Antriebsmechanismus ist vorzugsweise als hydraulischer Axial- oder Radialkolbenmotor ausgebildet, wobei der Lagerkranz auf der Höhe der Antriebskolben oder -kugeln angeordnet ist.The drive mechanism is preferably a hydraulic one Axial or radial piston engine, wherein the bearing rim at the level of the drive piston or -balls is arranged.
Eine weitere Ausgestaltungsvariante sieht vor, daß der Antriebsmechanismus als hydraulischer Drehflügelmotor ausgebildet ist, wobei der Lagerkranz auf der Höhe der Drehflügel angeordnet ist.Another embodiment variant provides that the Drive mechanism as a hydraulic rotary vane motor is formed, the bearing rim at the level of Swivel wing is arranged.
Eine weitere Möglichkeit besteht darin, daß der Antriebsmotor als hydrostatischer Innenzahnradmotor oder Innengerotor ausgebildet ist, wobei der Lagerkranz auf der Höhe der Motorverzahnungen angeordnet ist.Another possibility is that the drive motor as a hydrostatic internal gear motor or Inner rotor is formed, the bearing ring on the height of the motor gear is arranged.
Im folgenden wird die Erfindung anhand einiger in der Zeichnung in schematischer Weise dargestellter Ausführungsbeispiele näher erläutert. Es zeigen:
- Fig. 1
- einen senkrechten Schnitt durch einen Axialkolbenmotor in Flachbauweise mit statorseitigem Lagerkranz und rotorseitiger Lagernut;
- Fig. 2
- eine Darstellung entsprechend Fig. 1 mit zwei weiteren Lagervarianten;
- Fig. 3 bis 5
- je einen Ausschnitt aus dem Lagerbereich einer Drehvorrichtung entsprechend Fig. 1 und 2 mit verschiedenen Lagervarianten.
- Fig. 1
- a vertical section through an axial piston motor in flat design with a stator-side bearing ring and a rotor-side bearing groove;
- Fig. 2
- a representation corresponding to Figure 1 with two other storage variants.
- 3 to 5
- a section from the storage area of a rotating device according to FIGS. 1 and 2 with different storage variants.
Die in der Zeichnung dargestellten Drehvorrichtung sind
für Baggergreifer bestimmt, an denen hohe Zug-, Druck-
und Momentenbelastungen auftreten. Sie bestehen im wesentlichen
aus einem mit einem nicht gezeigten Baggerausleger
verbindbaren Stator 1, einem mit dem Stator
über eine Drehverbindung 4 verbundenen Rotor 6, an dem
ein nicht gezeigter Baggergreifer befestigbar ist, sowie
einem zwischen Stator und Rotor 6 wirkenden Antriebsmechanismus
8.The turning device shown in the drawing are
intended for excavator grapples where high tensile, compressive
and moment loads occur. They essentially exist
from a with an excavator boom, not shown
Die Drehverbindung 4 weist bei den Ausführungsbeispielen
nach Fig. 1 bis 5 einen auf der Höhe des Antriebsmechanismus
8 bundartig am Stator 1 radial überstehenden
Lagerkranz 40 und eine am Rotor angeordnete, den
Lagerkranz 40 formschlüssig umfassende, radial nach
innen offene Lagernut 42 auf, wobei zwischen Lagerkranz
40 und Lagernut 42 verschiedene, als Wälzlager, Gleitlager
oder Hydrostatiklager ausgebildete Lagerelemente
eingelegt oder eingeformt sind.The rotary connection 4 has in the
Bei dem in Fig. 1 gezeigten Ausführungsbeispiel ist
zwischen Lagerkranz 40 und Lagernut 42 ein oberes axiales
Nadellager 44, ein radiales Nadellager 46 und ein
unteres axiales Gleitlager 48 vorgesehen. Bei dem Ausführungsbeispiel
nach Fig. 2 rechts ist das radiale
Nadellager 46 durch ein Gleitlager 46' ersetzt, während
bei der im linken Bereich der Fig. 2 gezeigten Ausführungsvariante
das untere Gleitlager 48 durch ein Nadellager
48' ersetzt ist.In the embodiment shown in Fig. 1
an upper axial between
Bei Verwendung von schräg am Lagerkranz 40 und in der
Lagernut 42 abgestützten Kegelrollenlagern 50, 52 gemäß
Fig. 3 oder schräg abgestützten Kugellagern 54, 56 gemäß
Fig. 4 können die drei Lagerelemente der Figuren 1
und 2 durch zwei Lagerelemente ersetzt werden.When using obliquely on the
Weiter ist es im Sinne der Fig. 5 auch möglich, den
Lagerkranz 40 und die Lagernut 42 mit zueinander komplementär
gekrümmten Lagerflächen zur Aufnahme eines
entsprechend gekrümmten Gleitlagers 58 zu versehen. Die
Gleitlager 46', 48 und 58 können grundsätzlich auch als
Hydrostatiklager ausgebildet werden.Furthermore, it is also possible in the sense of
Am Stator 1 sind im Bereich oberhalb der Drehverbindung
4 vier in Umfangsrichtung einen Abstand voneinander
aufweisende Anschlüsse 15, 16 für den Anschluß von Hydraulikleitungen
17, 18 angeordnet, von denen aus sich
die Hydraulikkanäle 15' , 15" und 16' , 16" zu einer Drehdurchführung
30 bzw. einem mit dem Antriebsmechanismus
8 verbundenen Verteiler 70 erstrecken, um von dort in
die rotorseitigen Hydraulikkanäle 65', 65" bzw. die
verteilerseitigen Hydraulikkanäle 71' , 71" zu münden.
Die rotorseitigen Hydraulikkanäle 65', 65" führen zu
rotorseitigen Anschlüssen 66' , 66'', an die gegebenenfalls
unter Zwischenschaltung eines mit dem Rotor mittels
Schrauben 67 und Mitnehmerzapfen 68 verbindbaren
Anschlußadapters Hydraulikleitungen zur Greiferbetätigung
anschließbar sind. Die Drehdurchführungen für die
Greiferhydraulik sind bei den gezeigten Ausführungsbeispielen
durch zwei den Stator 1 und den Rotor 6 zentral
und koaxial durchgreifende Rohrstücke 32, 33 gebildet,
die mit ihren Enden in statorseitige bzw. rotorseitige
Stufenbohrungen 19 bzw. 69 eingreifen und dort schwimmend
gelagert sind.At the
Weiter ist ein schwimmender Radialverteiler 70 vorgesehen,
der von den Rohrstücken 32, 33 der Drehdurchführung
30 zentral durchgriffen wird.A floating radial distributor 70 is also provided,
of the
Die Drehdurchführungen 30 sind mit ihren Rohrstücken
32, 33 und ihren Dichtungsringen auch bei zusammengebautem
Stator, Rotor und Antriebsmechanismus von außen
her über eine durch ein Verschlußstück 90 verschließbare
Montageöffnung 91 zugänglich. Das Verschlußstück 90
weist einen in eine die Montageöffnung 91 bildende Axialbohrung
des Rotors flüssigkeitsdicht einsetzbaren
Zapfen 92 auf, der mit dem Ringflansch 93, Schrauben 94
und Mitnehmerstiften 95 am Rotor 6 befestigbar ist. Auf
der Innenseite weist das Verschlußstück 90 eine nach
dem Vorrichtungsinneren offene, zur Drehachse koaxiale
Sackloch- oder Stufenbohrung 69 für die Aufnahme des
einen Endes der Rohrstücke 32, 33 auf. Außerdem weist
das Verschlußstück 90 die beiden zu den rotorseitigen
Anschlüssen 66', 66" für die Greiferhydraulik führenden
Kanalabschnitte 65', 65" auf, von denen einer im wesentlichen
achszentral und der andere exzentrisch angeordnet
ist. The
Die in Fig. 1 und 2 gezeigten Ausführungsbeispiele enthalten
einen als Axialkolbenantrieb ausgebildeten Antriebsmechanismus
8, der eine Mehrzahl von auf einem
Inkreis des Stators 1 in gleichen Abständen voneinander
angeordnete axiale Druckzylinder 101 aufweist, in denen
je ein Kolben 102 sowie eine gegen die Stirnfläche des
Kolbens 102 anliegende, durch eine Zylinderöffnung mehr
oder weniger weit hindurchgreifende Kugel 103 angeordnet
sind. Auf ihrer Rückseite werden die Kolben 102 mit
Hydraulikflüssigkeit beaufschlagt, die über die Hydraulikkanäle
104 in die Druckzylinder 101 eintritt. Die
Kugeln 103 liegen mit ihrem aus der Zylinderöffnung
herausstehenden Teil gegen die entlang einem Inkreis
des Rotors verlaufende wellenförmige Kurvenbahn 106 mit
axialen Auslenkungen an. Die Kurvenbahn bestimmt zu
jedem Zeitpunkt den Hub der Kolben 102.The embodiments shown in Figs. 1 and 2 included
a drive mechanism designed as an axial piston drive
8, which is a plurality of on one
Incorporation of the
Statt des in der Zeichnung dargestellten hydraulischen Axialkolbenantriebs kann auch ein Radialkolbenantrieb, ein Drehflügelantrieb oder ein hydraulischer Innenzahnradantrieb (Innengerotor) als Antriebsmechanismus 8 verwendet werden.Instead of the hydraulic shown in the drawing Axial piston drive can also be a radial piston drive, a rotary leaf drive or a hydraulic internal gear drive (Inner rotor) as drive mechanism 8 be used.
Zusammenfassend ist folgendes festzustellen: Die Erfindung
bezieht sich auf eine Vorrichtung für die Drehung
eines mit dem Ausleger eines Baggers oder Krans verbundenen
Greifers oder dergleichen Werkzeugs. Die Drehvorrichtung
weist einen Stator 1, einen am Stator 1 mittels
einer Lageranordnung 4 um eine vertikale Achse
drehbar gelagerten Rotor 6, einen zwischen Stator und
Rotor angeordneten hydraulischen Antriebsmechanismus 8
und mindestens zwei Drehdurchführungen 30 für die Greiferbetätigung
auf. Um eine kompakte Bauweise mit geringer
Bauhöhe zu gewährleisten, wird gemäß der Erfindung
vorgeschlagen, daß die gesamte Lageranordnung 4 radial
außerhalb des Antriebsmechanismus auf dessen Höhe angeordnet
ist. Die Lageranordnung 4 weist zweckmäßig einen
am Stator 1 radial nach außen bundartig überstehenden
Lagerkranz 40 und eine am Rotor 6 angeordnete, den Lagerkranz
40 formschlüssig umfassende, radial nach innen
offene Lagernut 42 auf. Zwischen Lagerkranz und Lagernut
sind als Wälzlager und/oder Gleitlager ausgebildete
Lagerelemente eingelegt oder eingeformt.In summary, the following can be stated: The invention
refers to a device for rotation
one connected to the boom of an excavator or crane
Gripper or the like tool. The turning device
has a
Claims (16)
- Apparatus for the turning of a grab or like tool connected to the boom of an excavator or crane, comprising a stator (1) connectable to the boom, a rotor (6) connectable to the grab and rotatably journalled about a vertical axis at the stator (1) by means of a bearing arrangement (4), a hydraulic drive mechanism (8) arranged between stator (1) and rotor (6) and energisable with hydraulic oil, via two hydraulic passages (16', 16", 71', 71") led from stator side connections (16) through the stator (1), through liquid tight rotary lead-throughs (30) and through a distributor (70), which is optionally rotationally fixedly connected to the rotor (6) and at least two hydraulic passages (15', 15", 65', 65"), preferably for the hydraulic grab actuation, which are led via stator-side connections (15) through the stator (1) and through liquid-tight rotary lead-throughs (30) to the rotor (6) and through the latter to rotor side connections (66', 66"), characterized in that the bearing arrangement (4) has a bearing ring (40) radially outside of the drive mechanism (8)at its level which projects radially outwardly on the stator (1) in collar-like manner, and a radially inwardly open bearing groove (44) arranged on the rotor (6), which surrounds the bearing ring (40) in form-fitted manner or vice versa, wherein bearing elements formed as rolling bearings (44, 46, 48") and/or as plane bearings (46', 48; 58) and/or as hydrostatic bearings are inserted into or moulded in between bearing ring (40) and bearing groove (42).
- Apparatus in accordance with claim 1, characterized in that the rotor (6) or the stator (1) is split in two in the region of the bearing groove (42).
- Apparatus in accordance with one of the claims 1 or 2, characterized in that two thrust bearings (44, 48) and a radial bearing (46) are arranged between bearing ring (40) and bearing groove (42).
- Apparatus in accordance with claim 3, characterized in that at least one of the thrust bearings (44, 48') is formed as a rolling bearing, preferably as a needle bearing.
- Apparatus in accordance with claim 3 or 4, characterized in that the radial bearing is formed as a rolling bearing, preferably as a radial needle bearing (46), as a plane bearing (46'), or as a hydrostatic bearing.
- Apparatus in accordance with one of the claims 3 to 5, characterized in that at least one of the thrust bearings (48) is formed as a plane bearing or as a hydrostatic bearing.
- Apparatus in accordance with one of the claims 1 to 6, characterized in that two inclined bearings (50, 52; 54, 56) are arranged between bearing ring (40) and bearing groove (42).
- Apparatus in accordance with claim 7, characterized in that the inclined bearings are formed as rolling bearings, preferably as taper roller bearings (50, 52) or as angular contact ball bearings (54, 56).
- Apparatus in accordance with claim 7, characterized in that the inclined bearings are formed as plane bearings or as hydrostatic bearings.
- Apparatus in accordance with claim 1 or claim 2, characterized in that the bearing ring (40) and the bearing groove (42) have complementary curved bearing surfaces to receive a correspondingly curved plane bearing (58) or a hydrostatic bearing.
- Apparatus in accordance with one of the claims 1 to 10, characterized in that the stator (1) has the bearing ring (40) and the rotor (6) has the bearing groove (42).
- Apparatus in accordance with one of the claims 1 to 11, characterized in that at least a part of the hydraulic passages (15', 16', 15", 16") leading from the stator (1) via the rotary lead-throughs (32) to the rotor (6) passes centrally through the drive mechanism (8) and the bearing arrangement (4), and in that an axially central installation opening (91) accessible from the outside in the assembled together state of the stator (1) and rotor (6) and drive mechanism (8) for access to at least a part of the rotary lead-throughs (30) and/or to the distributor (70) and their seals (31, 97) is provided and is closeable by a closure member (90).
- Apparatus in accordance with claim 12, characterized in that the installation opening (91) is arranged at the end face of the rotor (6) at the grab side.
- Apparatus in accordance with one of the claims 1 to 13, characterized in that the drive mechanism is formed as a hydraulic axial or radial piston drive, and in that the bearing ring (40) is arranged at the level of the drive pistons or the drive balls (102, 103).
- Apparatus in accordance with one of the claims 1 to 13, characterized in that the drive mechanism is formed as a hydraulic rotary vane drive, and in that the bearing ring (40) is arranged at the level of its rotary vanes.
- Apparatus in accordance with one of the claims 1 to 13, characterized in that the drive mechanism is formed as a hydraulic inner gear drive or an inner gerotor, and in that the bearing ring (40) is arranged at the level of its drive teeth.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19505585 | 1995-02-18 | ||
| DE19505585A DE19505585A1 (en) | 1993-10-20 | 1995-02-18 | Slewing mechanism for tool coupled to excavator jib or wheel rim |
| PCT/EP1996/000684 WO1996026326A1 (en) | 1995-02-18 | 1996-02-19 | Slewing mechanism for an excavator grab |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0809735A1 EP0809735A1 (en) | 1997-12-03 |
| EP0809735B1 true EP0809735B1 (en) | 1999-08-25 |
Family
ID=7754376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96902986A Expired - Lifetime EP0809735B1 (en) | 1995-02-18 | 1996-02-19 | Slewing mechanism for an excavator grab |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0809735B1 (en) |
| AT (1) | ATE183793T1 (en) |
| WO (1) | WO1996026326A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004019909U1 (en) * | 2004-12-23 | 2006-04-27 | Heinz Thumm Ölhydraulische Antriebe GmbH | Turning device for load handling devices |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE520498E8 (en) | 2001-11-26 | 2015-10-20 | Komatsu Forest Ab | Device for hanging a rotary working tool |
| EP1939133B1 (en) | 2006-12-27 | 2012-04-25 | Caterpillar Inc. | Swivel for a fluid machine and rotator having such a swivel |
| EP2159411B1 (en) | 2008-08-29 | 2011-06-15 | Baltrotors, Sia | Piston-type rotator |
| DE102009019660A1 (en) * | 2009-04-30 | 2010-11-04 | Heinz Thumm | Turning device for load-handling devices, such as excavator gripper od. Like. |
| DE202010010857U1 (en) * | 2010-07-30 | 2010-10-21 | MTS Gesellschaft für Maschinentechnik und Sonderbauten mbH | milling device |
| SE539110C2 (en) * | 2013-04-10 | 2017-04-11 | Indexator Rotator Sys Ab | Swivel device at a rotator |
| WO2015155627A1 (en) * | 2014-04-10 | 2015-10-15 | Ala Officine S.P.A. | Multipath fluidic rotary distributor |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2357765A1 (en) * | 1976-07-05 | 1978-02-03 | Poclain Sa | TWO-PART PISTON ROD CYLINDER |
| DE2838346C2 (en) * | 1978-09-02 | 1985-02-14 | Fa. Heinz Thumm, 7012 Fellbach | Rotating device for an excavator grab or the like. |
| DE2838428C2 (en) * | 1978-09-02 | 1984-05-24 | Fa. Heinz Thumm, 7012 Fellbach | Rotating device for hanging loads |
| DE3132489A1 (en) * | 1981-08-17 | 1983-03-03 | Freund, Pierre, 8702 Veitshöchheim | Hydraulic motor for the rotary drive of an excavator and crane grab |
-
1996
- 1996-02-19 EP EP96902986A patent/EP0809735B1/en not_active Expired - Lifetime
- 1996-02-19 AT AT96902986T patent/ATE183793T1/en not_active IP Right Cessation
- 1996-02-19 WO PCT/EP1996/000684 patent/WO1996026326A1/en active IP Right Grant
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202004019909U1 (en) * | 2004-12-23 | 2006-04-27 | Heinz Thumm Ölhydraulische Antriebe GmbH | Turning device for load handling devices |
| EP1674420A1 (en) | 2004-12-23 | 2006-06-28 | Heinz Thumm Oelhydraulische Antriebe GmbH | Rotating device for load pick-up means |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1996026326A1 (en) | 1996-08-29 |
| ATE183793T1 (en) | 1999-09-15 |
| EP0809735A1 (en) | 1997-12-03 |
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