EP1518817B1 - Trolley, in particular monorail trolley with reduced height - Google Patents

Trolley, in particular monorail trolley with reduced height Download PDF

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Publication number
EP1518817B1
EP1518817B1 EP04022510A EP04022510A EP1518817B1 EP 1518817 B1 EP1518817 B1 EP 1518817B1 EP 04022510 A EP04022510 A EP 04022510A EP 04022510 A EP04022510 A EP 04022510A EP 1518817 B1 EP1518817 B1 EP 1518817B1
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EP
European Patent Office
Prior art keywords
running
trolley according
travelling trolley
trolley
friction
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EP04022510A
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German (de)
French (fr)
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EP1518817A2 (en
EP1518817A3 (en
Inventor
Heinrich Flaig
Klaus-Jürgen Winter
Erik Appel
Michael Dammer
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Demag Cranes and Components GmbH
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Demag Cranes and Components GmbH
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Publication of EP1518817A3 publication Critical patent/EP1518817A3/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C11/00—Trolleys or crabs, e.g. operating above runways
    • B66C11/02—Trolleys or crabs, e.g. operating above runways with operating gear or operator's cabin suspended, or laterally offset, from runway or track
    • B66C11/04—Underhung trolleys
    • B66C11/06—Underhung trolleys running on monorails
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C9/00—Travelling gear incorporated in or fitted to trolleys or cranes
    • B66C9/14—Trolley or crane travel drives

Definitions

  • the invention relates to a trolley, in particular Einschienenkatze short height, with a hoist having chassis frame which is mounted on wheels running on a running rail, in particular a lower flange, a substantially horizontally extending support, wherein at least one impeller is driven and at the bottom the running rail is arranged a cooperating with the driven impeller friction roller, wherein a pair of friction rollers is provided.
  • the hoist arranged laterally next to the carrier rail carrying carrier, so that the actual load attachment means, the load hook, can be lifted as high as possible under the carrier. From this arrangement of the hoist next to the carrier results in relation to the center of the carrier an off-center position of the net mass center of gravity of the chassis frame. Due to this eccentric shift emphasis when operating without payload the risk that the opposite the hoist on the running rail, especially the lower flange of a carrier, arranged wheels stand out.
  • a variant is to arrange a counterweight on the opposite side of the hoist frame of the chassis, so as to shift the net mass focus back to the center of the carrier.
  • a counterweight takes on the one hand additional space and on the other hand, the weight of the trolley and the carrier load are unnecessarily increased.
  • driven friction rollers are often expensive due to the friction roller drive and require space.
  • wear behavior of the cooperating driven wheels and friction rollers is usually different, whereby the rolling radii change differently, which in turn leads to additional slippage of the less loaded wheel.
  • the US 3,212,455 discloses a monorail trolley, in which on the underside of the track each opposite a wheel to prevent unwanted tilt a friction roller to the underside of the rail can be adjusted.
  • the friction roller can be pivoted by adjusting a screw to adjust the distance between the respective roller and to prevent depending on the rail inclination.
  • the US 3,074,354 which corresponds to the preamble of claim 1, discloses a monorail trolley, in which on the underside of the track each opposite an impeller driven rollers are provided, which can be adjusted to the underside of the rail, including the frame of the trolley via springs against the underside of the rail is pressed.
  • the present invention seeks to provide a trolley of the type mentioned, which ensures a reliable reduction of the slip of the driven impeller with a simple design.
  • the solution to this problem is characterized in that the friction rollers on an adjustment of the distance from each other via a common pressure mechanism to the underside of the running rail are adjustable.
  • the two friction rollers of each pair of friction rollers are arranged symmetrically to the axis of rotation of the respective impeller below the impeller, whereby both friction rollers of a pair of friction rollers always have an equal radial load and for ensure a uniform pressure of the impeller on the lower flange of the carrier serving as a running rail.
  • each pair of friction rollers can be fixed to the chassis frame via a support linkage, which preferably comprises two two-armed levers pivotable about a common axis, a friction roller being rotatably mounted on a free end of each lever.
  • This scissor-type construction of the support rod is not only structurally particularly simple and inexpensive to manufacture, it is also very flexible, since the distance between the two friction rollers of the pair of friction rollers is adjustable, so that the construction and regardless of the thickness of the rail, in particular the flange thickness of the lower flange, can be used and this is customizable.
  • the two other free ends of the lever of the support linkage via a spring-loaded pressure mechanism are connected to each other, via which the position of the friction rollers of the pair of friction rollers and their contact pressure to the underside of the running rail, in particular the lower flange, is adjustable.
  • the pressure mechanism preferably consists of a screw connecting the two free ends of the lever and a pressure spring which can be placed on the screw and tensioned by a nut.
  • a pressure spring which can be placed on the screw and tensioned by a nut.
  • each pair of friction rollers can be fixed to a traverse arranged transversely to the direction of travel on the chassis frame. Since it is preferably the trusses are the trusses that connect the right and left of the carrier arranged parts of the chassis frame with each other, the installation of the friction roller pair supporting support linkage requires no additional components that would not be necessary to eliminate the installation of the pair of friction rollers.
  • the positioning of the support linkage is carried out on the traverse over an attachable to the crossbar spacer tube.
  • the support rod is positioned in a positionally accurate manner by means of a collar which can be fixed on the cross member, for example by means of a threaded pin or a grub screw, on the cross member.
  • a non-driven pair of friction rollers is arranged below all the wheels which are arranged in the direction of travel in a row with the at least one driven wheel.
  • the trolley shown in Figures 1 and 2 in front view and plan view consists essentially of a lifting mechanism 1 containing chassis frame 2, the four wheels 3, 3a along a trained as a lower flange 4a rail of a substantially horizontally extending I-shaped support 4 movable is, with an impeller 3a is driven by a traction drive 5.
  • a traction drive 5 As an alternative to driving only one impeller 3a, it is also possible to drive a plurality of impellers via the one traction drive 5 or in each case separate drives.
  • the trolley can also be used in conjunction with other carriers, such as box girders, if the running rail has a cross-section which has opposite running surfaces for the running wheels 3, 3a and the friction rollers 10, which will be described later.
  • the chassis frame 2 of the illustrated monorail cat In order to raise a load hook 6 via a cable 7 by means of the hoist 1 as high as possible under the carrier 4, the chassis frame 2 of the illustrated monorail cat on a particularly low height.
  • This low height is achieved in that the chassis frame 2 is formed of two frame parts 2a and 2b, which are arranged on both sides next to the carrier 4.
  • the two frame parts 2 a and 2 b of the chassis frame 2 are connected to each other across transverse to the direction of travel of the trolley trusses 8 rigid.
  • the lifting unit consisting of a cable drum 1a of the hoisting gear 1 and a reeving part 9, which for example includes a cable end attachment, is arranged such that the load hook 6 guided on the cable pull 7 is positioned vertically below the vertical axis of the carrier 4 in order to reduce the load on the carrier 4 to minimize.
  • the sectional view according to FIG. 3 and the perspective view according to FIG. 4 show the structure of the pair of friction rollers as well as its positioning on the trolley.
  • the pair of friction rollers can be fixed via a support rod 12 on the chassis frame 2, which consists of two pivotable about a common axis 13 two-armed levers 14.
  • the two friction rollers 10 of the pair of friction rollers are each rotatably mounted at a free end of each lever 14 of the scissors-like support rod 12.
  • the lever 14 in the region of the pivot axis 13 has a bore 15 through which the support rod 12 is rotatably mounted on one of the trusses 8, which connect the two frame parts 2a and 2b together.
  • the support rod 12 is mounted on the front in Figure 2 traverse 8 and as shown in Figures 2 and 3 can be seen positioned so that it is centrally below the driven wheel 3a and the two friction rollers 10 of the pair of friction rollers symmetrical to the axis of rotation 3b of the impeller 3a are arranged.
  • the positioning of the support rod 12 on the cross member 8 is structurally particularly advantageous because the storage of the support rod 12 no additional components are required, which would not be required when omitting the support rod 12.
  • the pressing mechanism 16 consists of one of the two free ends of the lever 14 interconnecting screw 16a, a screw-on the screw 16 a can be placed helical compression spring 16b and a screwed onto the screw 16a nut 16c on the the compression spring 16b is compressible and relaxed again.
  • FIGS. 5 and 6 show two variants of how the support linkage 12 can be positioned in a positionally correct manner below the driven running wheel 4a on the traverse 8.
  • the support rod 12 is positioned over an attachable to the cross member 8 and the support rod 12 adjusting ring 18, wherein the adjusting ring 18, for example via a threaded pin 18a or a grub screw 18a on the crossbar 8 can be fixed.
  • the position of the support rod 12 is freely selectable depending on the flange width B of the lower flange 4a of the carrier 4, but is preferably adjusted so that the friction rollers 10 are arranged centrally below the driven wheel 3a.
  • the compression spring 16b of the pressing mechanism 16 is more or less loaded.
  • the compression spring 16b is further shortened until the above the support rod 12 arranged driven impeller 3a occurs with its running surface in contact with the lower flange 4a of the support 4. This is the zero position of the radial load of the driven impeller 3a.
  • the compression spring 16b is further biased until the driven impeller 3a no longer slips when accelerating the traction drive 5. In this position, the compression spring 16b of the pressure mechanism 16 still has sufficient distance to the maximum clamping position to avoid further slippage by further biasing even with wet or oily tread of the lower flange 4a.
  • the length and characteristic of the compression spring 16b can be chosen so that the support rod 12 and thus the pair of friction rollers on commercial flange thicknesses is adjustable.
  • the trolley described above is characterized in that the friction roller assembly is very compact, space-saving and easy to install.
  • the acceleration torque and thus the starting acceleration can be controlled and limited to an acceptable level, whereby the size of the radial load on the driven impeller 3a can be significantly reduced compared to solutions without frequency converter.

Abstract

The trolley has a undercarriage frame, with a hoisting gear, traveled by running wheels (3, 3a) on a lower flange (4a). A pair of friction rollers (10) is positioned against an under side (4b) of the flange by adjusting the spacing between the rollers via a common pressing mechanism. The rollers are arranged symmetrically with respect to an axis of rotation of the wheel (3a) underneath the wheel (3a).

Description

Die Erfindung betrifft eine Laufkatze, insbesondere Einschienenkatze mit kurzer Bauhöhe, mit einem ein Hubwerk aufweisenden Fahrwerkrahmen, der über Laufräder verfahrbar auf einer Fahrschiene, insbesondere einem Unterflansch, eines im Wesentlichen horizontal verlaufenden Trägers gelagert ist, wobei mindestens ein Laufrad antreibbar ist und an der Unterseite der Fahrschiene eine mit dem angetriebenen Laufrad zusammenwirkende Reibrolle angeordnet ist, wobei ein Paar Reibrollen vorgesehen ist.The invention relates to a trolley, in particular Einschienenkatze short height, with a hoist having chassis frame which is mounted on wheels running on a running rail, in particular a lower flange, a substantially horizontally extending support, wherein at least one impeller is driven and at the bottom the running rail is arranged a cooperating with the driven impeller friction roller, wherein a pair of friction rollers is provided.

Bei den Laufkatzen mit kurzer Bauhöhe ist, um eine kompakte und Platz sparende Bauweise realisieren zu können, das Hubwerk seitlich neben dem die Fahrschiene tragenden Träger angeordnet, so dass das eigentliche Lastanschlagmittel, der Lasthaken, möglichst hoch unter den Träger gehoben werden kann. Aus dieser Anordnung des Hubwerks neben dem Träger ergibt sich bezogen auf die Trägermitte eine außermittige Lage des Eigenmasse-Schwerpunktes des Fahrwerkrahmens. Aufgrund dieser außermittigen Schwerpunktverlagerung besteht bei Betrieb ohne Nutzlast die Gefahr, dass die gegenüber dem Hubwerk auf der Fahrschiene, insbesondere dem Unterflansch eines Trägers, angeordneten Laufräder abheben.In the trolleys with a short overall height, in order to realize a compact and space-saving design, the hoist arranged laterally next to the carrier rail carrying carrier, so that the actual load attachment means, the load hook, can be lifted as high as possible under the carrier. From this arrangement of the hoist next to the carrier results in relation to the center of the carrier an off-center position of the net mass center of gravity of the chassis frame. Due to this eccentric shift emphasis when operating without payload the risk that the opposite the hoist on the running rail, especially the lower flange of a carrier, arranged wheels stand out.

Ein solches Abheben muss vermieden werden, um eine Beschädigung der Laufkatze und/oder des Trägers zu verhindern und ein Durchrutschen der angetriebenen Laufräder zu vermeiden.Such lifting must be avoided in order to prevent damage to the trolley and / or the carrier and to prevent slippage of the driven wheels.

Zur Lösung dieses Problems sind aus der Praxis verschiedene Vorschläge bekannt. Eine Variante besteht darin, auf der dem Hubwerk gegenüberliegenden Seite des Fahrwerkrahmens ein Gegengewicht anzuordnen, um so den Eigenmasse-Schwerpunkt wieder auf die Trägermitte zu verlagern. Ein Gegengewicht beansprucht einerseits zusätzlichen Bauraum und andererseits werden das Eigengewicht der Laufkatze und die Trägerbelastung unnötig erhöht.To solve this problem, various proposals are known from practice. A variant is to arrange a counterweight on the opposite side of the hoist frame of the chassis, so as to shift the net mass focus back to the center of the carrier. A counterweight takes on the one hand additional space and on the other hand, the weight of the trolley and the carrier load are unnecessarily increased.

Aus der DE 42 09 565 C2 sowie der EP 0 620 179 B1 sind gattungsgemäße Laufkatzen bekannt, bei denen auf der Unterseite des Unterflansches eine mit dem mindestens einen angetriebenen Laufrad zusammenwirkende Reibrolle angeordnet ist. Diese ebenfalls angetriebene Reibrolle ist über einen Federmechanismus gegen die Unterseite des Unterflansches vorspannbar, um die Traktion des angetriebenen Laufrades zu erhöhen.From the DE 42 09 565 C2 as well as the EP 0 620 179 B1 generic trolleys are known in which on the underside of the lower flange one with the at least one driven impeller cooperating friction roller is arranged. This also driven friction roller is biased by a spring mechanism against the underside of the lower flange to increase the traction of the driven impeller.

Diese bei bekannten, angetriebenen Reibrollen verwendenden Konstruktionen sind aufgrund des Reibrollenantriebs oft aufwendig und benötigen Platz. Darüber hinaus ist normalerweise das Verschleißverhalten der miteinander zusammenwirkenden angetriebenen Laufräder und Reibrollen unterschiedlich, wodurch sich die Abrollradien unterschiedlich verändern, was wiederum zu zusätzlichem Schlupf des geringer belasteten Rades führt.These constructions used in known, driven friction rollers are often expensive due to the friction roller drive and require space. In addition, the wear behavior of the cooperating driven wheels and friction rollers is usually different, whereby the rolling radii change differently, which in turn leads to additional slippage of the less loaded wheel.

Die US 3,212,455 offenbart eine Einschienenlaufkatze, bei der auf der Unterseite der Laufschiene jeweils gegenüberliegend eines Laufrades zur Verhinderung einer ungewünschten Neigung eine Reibrolle an die Unterseite der Schiene anstellbar ist. Die Reibrolle kann durch Verstellung einer Schraube verschwenkt werden, um den Abstand zwischen der jeweiligen Laufrolle und sich einzustellen, um je nach Fahrschiene die Neigung zu verhindern.The US 3,212,455 discloses a monorail trolley, in which on the underside of the track each opposite a wheel to prevent unwanted tilt a friction roller to the underside of the rail can be adjusted. The friction roller can be pivoted by adjusting a screw to adjust the distance between the respective roller and to prevent depending on the rail inclination.

Die US 3,074,354 , welche dem Oberbegriff des Anspruchs 1 entspricht, offenbart eine Einschienenlaufkatze, bei der auf der Unterseite der Laufschiene jeweils gegenüberliegend eines Laufrades angetriebene Rollen vorhanden sind, die an die Unterseite der Schiene anstellbar sind, wozu das Gestell der Laufkatze über Federn gegen die Unterseite der Schiene gedrückt wird.The US 3,074,354 , which corresponds to the preamble of claim 1, discloses a monorail trolley, in which on the underside of the track each opposite an impeller driven rollers are provided, which can be adjusted to the underside of the rail, including the frame of the trolley via springs against the underside of the rail is pressed.

Davon ausgehend liegt der Erfindung die Aufgabe zugrunde, eine Laufkatze der eingangs genannten Art zu schaffen, die bei einfacher Konstruktion eine zuverlässige Verminderung des Schlupfs des angetriebenen Laufrades gewährleistet.Based on this, the present invention seeks to provide a trolley of the type mentioned, which ensures a reliable reduction of the slip of the driven impeller with a simple design.

Die Lösung dieser Aufgabenstellung ist dadurch gekennzeichnet, dass die Reibrollen über eine Einstellung des Abstandes zueinander über einen gemeinsamen Andrückmechanismus an die Unterseite der Fahrschiene anstellbar sind.The solution to this problem is characterized in that the friction rollers on an adjustment of the distance from each other via a common pressure mechanism to the underside of the running rail are adjustable.

Durch die Ausgestaltung der der Erhöhung der Traktion dienenden Reibrolle als nicht angetriebenes Reibrollenpaar ist es möglich, die Reibrollenkonstruktion besonders leicht und kompakt und somit Platz sparend auszugestalten, da auf einen Antrieb der Reibrollen verzichtet wurde.Due to the design of the friction roller serving as a non-driven pair of friction rollers, it is possible to make the friction roller construction particularly light and compact and thus space-saving, since a drive of the Friction rolls was waived.

Um sicherzustellen, dass das Reibrollenpaar ein Durchrutschen des angetriebenen Laufrades unabhängig von der Fahrtrichtung der Laufkatze gewährleistet, sind die beiden Reibrollen eines jeden Reibrollenpaares symmetrisch zur Drehachse des jeweiligen Laufrades unterhalb des Laufrades angeordnet, wodurch beide Reibrollen eines Reibrollenpaares stets eine gleich große Radiallast aufweisen und für einen gleichmäßigen Andruck des Laufrades auf den als Fahrschiene dienenden Unterflansch des Trägers sorgen.To ensure that the friction roller pair ensures slippage of the driven impeller regardless of the direction of travel of the trolley, the two friction rollers of each pair of friction rollers are arranged symmetrically to the axis of rotation of the respective impeller below the impeller, whereby both friction rollers of a pair of friction rollers always have an equal radial load and for ensure a uniform pressure of the impeller on the lower flange of the carrier serving as a running rail.

Gemäß einer praktischen Ausführungsform der Erfindung wird vorgeschlagen, dass jedes Reibrollenpaar über ein Stützgestänge am Fahrwerkrahmen festlegbar ist, das vorzugsweise zwei um eine gemeinsame Achse verschwenkbare zweiarmige Hebel umfasst, wobei an einem freien Ende eines jeden Hebels eine Reibrolle drehbar gelagert ist. Diese scherenartige Konstruktion des Stützgestänges ist nicht nur konstruktiv besonders einfach und günstig zu fertigen, sie ist darüber hinaus auch sehr flexibel einsetzbar, da der Abstand der beiden Reibrollen des Reibrollenpaares zueinander einstellbar ist, so dass die Konstruktion auch unabhängig von der Dicke der Fahrschiene, insbesondere der Flanschdicke des Unterflansches, einsetzbar und diese anpassbar ist.According to a practical embodiment of the invention, it is proposed that each pair of friction rollers can be fixed to the chassis frame via a support linkage, which preferably comprises two two-armed levers pivotable about a common axis, a friction roller being rotatably mounted on a free end of each lever. This scissor-type construction of the support rod is not only structurally particularly simple and inexpensive to manufacture, it is also very flexible, since the distance between the two friction rollers of the pair of friction rollers is adjustable, so that the construction and regardless of the thickness of the rail, in particular the flange thickness of the lower flange, can be used and this is customizable.

Gemäß einer Ausführungsform der Erfindung sind die beiden anderen freien Enden der Hebel des Stützgestänges über einen federbelasteten Andrückmechanismus miteinander verbunden, über den die Lage der Reibrollen des Reibrollenpaares und deren Anpressdruck an die Unterseite der Fahrschiene, insbesondere des Unterflansches, einstellbar ist.According to one embodiment of the invention, the two other free ends of the lever of the support linkage via a spring-loaded pressure mechanism are connected to each other, via which the position of the friction rollers of the pair of friction rollers and their contact pressure to the underside of the running rail, in particular the lower flange, is adjustable.

Der Andrückmechanismus besteht vorzugsweise aus einer die beiden freien Enden der Hebel miteinander verbindenden Schraube und einer auf die Schraube aufsetzbaren und über eine Mutter spannbaren Druckfeder. Neben der besonders einfachen und kostengünstigen Konstruktion dieses Mechanismus bietet er die Möglichkeit, die Reibrollen in weiten Grenzen stufenlos einzustellen und über die Wahl der Federlänge und deren Kennlinie die Anpresskraft variieren zu können.The pressure mechanism preferably consists of a screw connecting the two free ends of the lever and a pressure spring which can be placed on the screw and tensioned by a nut. In addition to the particularly simple and inexpensive construction of this mechanism, it offers the ability to adjust the friction rollers stepless within wide limits and to vary the contact pressure by choosing the spring length and its characteristic curve.

Weiterhin wird vorgeschlagen, dass das Stützgestänge eines jeden Reibrollenpaares an einer quer zur Verfahrrichtung am Fahrwerkrahmen angeordneten Traverse festlegbar ist. Da es sich bei den Traversen vorzugsweise um die Traversen handelt, die die rechts und links des Trägers angeordneten Teile des Fahrwerkrahmens miteinander verbinden, erfordert der Einbau des das Reibrollenpaar tragenden Stützgestänges keine zusätzlichen Bauteile, die beim Fortfall des Einbaus des Reibrollenpaares nicht erforderlich wären.Furthermore, it is proposed that the support linkage of each pair of friction rollers can be fixed to a traverse arranged transversely to the direction of travel on the chassis frame. Since it is preferably the trusses are the trusses that connect the right and left of the carrier arranged parts of the chassis frame with each other, the installation of the friction roller pair supporting support linkage requires no additional components that would not be necessary to eliminate the installation of the pair of friction rollers.

Gemäß einer ersten Ausführungsform der Erfindung erfolgt das Positionieren des Stützgestänges auf der Traverse über ein auf die Traverse aufsetzbares Distanzrohr.According to a first embodiment of the invention, the positioning of the support linkage is carried out on the traverse over an attachable to the crossbar spacer tube.

Bei einer zweiten Ausführungsform der Erfindung wird das Stützgestänge über einen auf der Traverse, beispielsweise mittels eines Gewindestiftes oder einer Madenschraube, festlegbaren Stellring auf der Traverse lagegenau positioniert.In a second embodiment of the invention, the support rod is positioned in a positionally accurate manner by means of a collar which can be fixed on the cross member, for example by means of a threaded pin or a grub screw, on the cross member.

Schließlich wird vorgeschlagen, dass unterhalb aller Laufräder, die in Verfahrrichtung in einer Reihe mit dem mindestens einen angetriebenen Laufrad angeordnet sind, ein nicht angetriebenes Reibrollenpaar angeordnet ist.Finally, it is proposed that a non-driven pair of friction rollers is arranged below all the wheels which are arranged in the direction of travel in a row with the at least one driven wheel.

Weitere Merkmale und Vorteile der Erfindung sind anhand der zugehörigen Zeichnung beschrieben, in der zwei Ausführungsbeispiele einer erfindungsgemäßen Laufkatze nur beispielhaft schematisch dargestellt sind. In der Zeichnung zeigt:

Figur 1
eine schematische Vorderansicht einer Laufkatze;
Figur 2
eine Draufsicht auf die Laufkatze gemäß Figur 1 jedoch ohne Träger;
Figur 3
einen Schnitt entlang der Schnittlinie III-III gemäß Figur 1;
Figur 4
eine perspektivische Seitenansicht eines Stützgestänges mit Reibrollenpaar;
Figur 5
eine im Wesentlichen der Figur 1 entsprechende Vorderansicht, eine erste Ausführungsform der Positionierung des Stützgestänges darstellend und
Fig. 6
eine ausschnittsweise Ansicht gemäß Figur 5, jedoch eine zweite Ausführungsform der Positionierung des Stützgestänges darstellend.
Further features and advantages of the invention are described with reference to the accompanying drawing in which two embodiments of a trolley according to the invention are shown by way of example only schematically. In the drawing shows:
FIG. 1
a schematic front view of a trolley;
FIG. 2
a top view of the trolley according to Figure 1 but without a carrier;
FIG. 3
a section along the section line III-III of Figure 1;
FIG. 4
a side perspective view of a support rod with friction roller pair;
FIG. 5
a substantially corresponding to Figure 1 front view, a first embodiment of the positioning of the support link representing and
Fig. 6
a fragmentary view of Figure 5, but showing a second embodiment of the positioning of the support rod.

Die in den Figuren 1 und 2 in Vorderansicht und Draufsicht dargestellte Laufkatze besteht im Wesentlichen aus einem ein Hubwerk 1 beinhaltenden Fahrwerkrahmen 2, der über vier Laufräder 3, 3a entlang einer als Unterflansch 4a ausgebildeten Fahrschiene eines im Wesentlichen horizontal verlaufenden I-förmigen Trägers 4 verfahrbar ist, wobei ein Laufrad 3a über einen Fahrantrieb 5 angetrieben wird. Alternativ zum Antrieb nur eines Laufrades 3a können auch mehrere Laufräder über den einen Fahrantrieb 5 oder jeweils separate Antriebe angetrieben werden. Die Laufkatze ist in auch in Verbindung mit anderen Trägern wie beispielsweise Kastenträgern verwendbar, sofern die Fahrschiene einen Querschnitt aufweist, der gegenüberliegende Fahrflächen für die Laufräder 3, 3a und die später noch beschriebenen Reibrollen 10 aufweist.The trolley shown in Figures 1 and 2 in front view and plan view consists essentially of a lifting mechanism 1 containing chassis frame 2, the four wheels 3, 3a along a trained as a lower flange 4a rail of a substantially horizontally extending I-shaped support 4 movable is, with an impeller 3a is driven by a traction drive 5. As an alternative to driving only one impeller 3a, it is also possible to drive a plurality of impellers via the one traction drive 5 or in each case separate drives. The trolley can also be used in conjunction with other carriers, such as box girders, if the running rail has a cross-section which has opposite running surfaces for the running wheels 3, 3a and the friction rollers 10, which will be described later.

Um einen Lasthaken 6 über einen Seilzug 7 mittels des Hubwerks 1 möglichst hoch unter den Träger 4 anheben zu können, weist der Fahrwerkrahmen 2 der dargestellten Einschienenkatze eine besonders niedrige Bauhöhe auf. Diese niedrige Bauhöhe wird dadurch erzielt, dass der Fahrwerkrahmen 2 aus zwei Rahmenteilen 2a und 2b ausgebildet ist, die zu beiden Seiten neben dem Träger 4 angeordnet sind. Die beiden Rahmenteile 2a und 2b des Fahrwerkrahmens 2 sind über quer zur Verfahrrichtung der Laufkatze verlaufende Traversen 8 biegesteif miteinander verbunden. Die aus einer Seiltrommel 1a des Hubwerks 1 und einem Einscherungsteil 9, welches beispielsweise eine Seilendbefestigung beinhaltet, bestehende Hubeinheit ist so angeordnet, dass der am Seilzug 7 geführte Lasthaken 6 senkrecht unter der lotrechten Achse des Trägers 4 positioniert ist, um die Beanspruchung des Trägers 4 zu minimieren.In order to raise a load hook 6 via a cable 7 by means of the hoist 1 as high as possible under the carrier 4, the chassis frame 2 of the illustrated monorail cat on a particularly low height. This low height is achieved in that the chassis frame 2 is formed of two frame parts 2a and 2b, which are arranged on both sides next to the carrier 4. The two frame parts 2 a and 2 b of the chassis frame 2 are connected to each other across transverse to the direction of travel of the trolley trusses 8 rigid. The lifting unit consisting of a cable drum 1a of the hoisting gear 1 and a reeving part 9, which for example includes a cable end attachment, is arranged such that the load hook 6 guided on the cable pull 7 is positioned vertically below the vertical axis of the carrier 4 in order to reduce the load on the carrier 4 to minimize.

Neben der dargestellten Verwendung eines Seilzugs 7 ist es selbstverständlich auch möglich, das Hubwerk 1 mit einem Kettenzug zu betreiben.In addition to the illustrated use of a cable 7, it is of course also possible to operate the hoist 1 with a chain hoist.

Aus der Anordnung des Fahrwerkrahmens 2 seitlich neben dem Träger 4 folgt eine - bezogen auf die Mitte des Trägers 4 - außermittige, hin zum das Hubwerk 1 beinhaltenden Rahmenteil 2a verschobene Lage des Eigenmasse-Schwerpunktes des Fahrwerkrahmens 2. Diese Verlagerung des Eigenmasse-Schwerpunktes kann bewirken, dass bei Betrieb der Laufkatze ohne Nutzlast die dem Hubwerk 1 gegenüber angeordneten Laufräder 3 und insbesondere das angetriebene Laufrad 3a abheben und/oder Durchrutschen.From the arrangement of the chassis frame 2 laterally next to the support 4 follows a - relative to the center of the support 4 - off-center, towards the hoist 1-containing frame part 2a shifted position of the net mass center of gravity of the chassis frame 2. This shift of the net mass center of gravity cause, when operating the trolley without payload lifting the lifting gear 1 arranged opposite wheels 3 and in particular the driven wheel 3a and / or slipping.

Um ein solches Abheben oder Durchrutschen insbesondere des angetriebenen Laufrades 3a zu vermeiden, ist bei der dargestellten Ausführungsform unterhalb des angetriebenen Laufrades 3a ein mit dem angetriebenen Laufrad 3a zusammenwirkendes und an der Unterseite 4b der als Unterflansch 4a ausgebildeten Fahrschiene anliegendes, aus zwei Reibrollen 10 bestehendes Reibrollenpaar angeordnet. Der Aufbau und die Wirkungsweise des Reibrollenpaares werden nachfolgend zu den Abbildungen Figuren 3 und 4 näher erläutert.In order to avoid such lifting or slipping in particular of the driven impeller 3a, in the illustrated embodiment below the driven impeller 3a cooperating with the driven impeller 3a and on the underside 4b of the trained as a lower flange 4a rail, consisting of two friction rollers 10 existing friction rollers arranged. The construction and the mode of operation of the pair of friction rollers are explained in more detail below with reference to FIGS. 3 and 4.

Zum Stabilisieren des Geradeauslauf der Laufkatze sind darüber hinaus in der Nähe der Laufräder 3, 3a vier Führungsrollen 11 um die Lotrechte drehbar an den Rahmenteilen 2a und 2b des Fahrwerkrahmens 2 gelagert, die sich an den äußeren Flanken 4c des Unterflansches 4a des Trägers 4 abstützen, wie dies der Abbildung Figur 1 zu entnehmen ist.To stabilize the straight running of the trolley, four guide rollers 11 are rotatably mounted about the perpendicular to the frame parts 2a and 2b of the chassis frame 2 in the vicinity of the wheels 3, 3a, which are supported on the outer edges 4c of the lower flange 4a of the support 4, as can be seen from the figure Figure 1.

Der Schnittdarstellung gemäß Figur 3 sowie der perspektivischen Ansicht gemäß Figur 4 sind der Aufbau des Reibrollenpaares sowie dessen Positionierung an der Laufkatze zu entnehmen. Wie aus den Figuren ersichtlich, ist das Reibrollenpaar über ein Stützgestänge 12 am Fahrwerkrahmen 2 festlegbar, das aus zwei um eine gemeinsame Achse 13 verschwenkbaren zweiarmigen Hebeln 14 besteht. Die beiden Reibrollen 10 des Reibrollenpaares sind jeweils an einem freien Ende eines jeden Hebels 14 des scherenartigen Stützgestänges 12 drehbar gelagert.The sectional view according to FIG. 3 and the perspective view according to FIG. 4 show the structure of the pair of friction rollers as well as its positioning on the trolley. As can be seen from the figures, the pair of friction rollers can be fixed via a support rod 12 on the chassis frame 2, which consists of two pivotable about a common axis 13 two-armed levers 14. The two friction rollers 10 of the pair of friction rollers are each rotatably mounted at a free end of each lever 14 of the scissors-like support rod 12.

Zum Festlegen des Stützgestänges 12 am Fahrwerkrahmen 2 weisen die Hebel 14 im Bereich der Schwenkachse 13 eine Bohrung 15 auf, über die das Stützgestänge 12 drehbar auf einer der Traversen 8 lagerbar ist, die die beiden Rahmenteile 2a und 2b miteinander verbinden. Bei der dargestellten Ausführungsform ist das Stützgestänge 12 auf der in Abbildung Figur 2 vorderen Traverse 8 gelagert und wie aus Figuren 2 und 3 ersichtlich so positioniert, dass es mittig unter dem angetriebenen Laufrad 3a angeordnet ist und die beiden Reibrollen 10 des Reibrollenpaares symmetrisch zur Drehachse 3b des Laufrades 3a angeordnet sind.To set the support rod 12 on the chassis frame 2, the lever 14 in the region of the pivot axis 13 has a bore 15 through which the support rod 12 is rotatably mounted on one of the trusses 8, which connect the two frame parts 2a and 2b together. In the illustrated embodiment, the support rod 12 is mounted on the front in Figure 2 traverse 8 and as shown in Figures 2 and 3 can be seen positioned so that it is centrally below the driven wheel 3a and the two friction rollers 10 of the pair of friction rollers symmetrical to the axis of rotation 3b of the impeller 3a are arranged.

Das Positionieren des Stützgestänges 12 auf der Traverse 8 ist konstruktiv besonders vorteilhaft, da zur Lagerung des Stützgestänges 12 keine zusätzlichen Bauteile erforderlich sind, die beim Weglassen des Stützgestänges 12 nicht erforderlich wären.The positioning of the support rod 12 on the cross member 8 is structurally particularly advantageous because the storage of the support rod 12 no additional components are required, which would not be required when omitting the support rod 12.

Um die Reibrollen 10 des Reibrollenpaares in Anlage an die Unterseite 4b des Unterflansches 4a zu bringen und darüber auch das angetriebene Laufrad 3a mit seiner Lauffläche auf den Unterflansch 4a zu drücken, sind die den Reibrollen 10 entgegen gesetzten freien Enden der Hebel 14 über einen Andrückmechanismus 16 miteinander verbunden. Die Betätigung dieses Andrückmechanismus 16 bewirkt ein gegenseitiges Verschwenken der Hebel 14 relativ zueinander und somit ein Verstellen des Abstandes der Reibrollen 10 voneinander.To bring the friction rollers 10 of the pair of friction rollers in abutment against the bottom 4b of the lower flange 4a and also press the driven impeller 3a with its tread on the lower flange 4a, the friction rollers 10 opposite free ends of the lever 14 via a pressure mechanism 16th connected with each other. The operation of this pressure mechanism 16 causes a mutual pivoting of the lever 14 relative to each other and thus an adjustment of the distance of the friction rollers 10 from each other.

Bei der in den Figuren 3 und 4 dargestellten Ausführungsform besteht der Andrückmechanismus 16 aus einer die beiden freien Enden der Hebel 14 miteinander verbindenden Schraube 16a, einer auf die Schraube 16 a aufsetzbaren wendelförmigen Druckfeder 16b sowie einer auf die Schraube 16a aufschraubbaren Mutter 16c, über die die Druckfeder 16b zusammendrückbar und wieder entspannbar ist.In the embodiment shown in Figures 3 and 4, the pressing mechanism 16 consists of one of the two free ends of the lever 14 interconnecting screw 16a, a screw-on the screw 16 a can be placed helical compression spring 16b and a screwed onto the screw 16a nut 16c on the the compression spring 16b is compressible and relaxed again.

In den Figuren 5 und 6 sind zwei Varianten dargestellt, wie das Stützgestänge 12 lagegenau unterhalb des angetriebenen Laufrades 4a auf der Traverse 8 positioniert werden kann. Bei der in Figur 5 dargestellten ersten Ausführungsform erfolgt die Positionierung des Stützgestänges 12 über ein auf die Traverse 8 aufsetzbares Distanzrohr 17, das sich einerseits am Rahmenteil 2a und andererseits an den Hebeln 14 des Stützgestänges 12 abstützt.FIGS. 5 and 6 show two variants of how the support linkage 12 can be positioned in a positionally correct manner below the driven running wheel 4a on the traverse 8. In the first embodiment shown in Figure 5, the positioning of the support rod 12 via an attachable to the crossbar 8 spacer tube 17, which is supported on the one hand on the frame part 2a and on the other hand on the levers 14 of the support rod 12.

Gemäß der in Figur 6 dargestellten zweiten Ausführungsform wird das Stützgestänge 12 über einen auf die Traverse 8 aufsetzbaren und am Stützgestänge 12 anliegenden Stellring 18 positioniert, wobei der Stellring 18 beispielsweise über einen Gewindestift 18a oder eine Madenschraube 18a auf der Traverse 8 fixierbar ist.According to the second embodiment shown in Figure 6, the support rod 12 is positioned over an attachable to the cross member 8 and the support rod 12 adjusting ring 18, wherein the adjusting ring 18, for example via a threaded pin 18a or a grub screw 18a on the crossbar 8 can be fixed.

Mit Hilfe des Distanzrohres 17 oder des Stellrings 18 ist die Position des Stützgestänges 12 je nach Flanschbreite B des Unterflansches 4a des Trägers 4 frei wählbar, wird aber vorzugsweise so eingestellt, dass die Reibrollen 10 mittig unter dem angetriebenen Laufrad 3a angeordnet sind.With the help of the spacer tube 17 or the adjusting ring 18, the position of the support rod 12 is freely selectable depending on the flange width B of the lower flange 4a of the carrier 4, but is preferably adjusted so that the friction rollers 10 are arranged centrally below the driven wheel 3a.

Neben der Verwendung nur eines Reibrollenpaares, das ausschließlich unterhalb des angetriebenen Laufrades 3a angeordnet ist, ist es selbstverständlich auch möglich, Reibrollenpaare unter mehreren Laufrädern 3 anzuordnen, insbesondere unterhalb allen Laufrädern 3 auf dem Teil des Unterflansches 4a des Trägers 4, der dem das Hubwerk 1 beinhaltenden Rahmenteil 2a gegenüber liegt, da bei diesen Laufrädern 3 aufgrund der Schwerpunktverschiebung die Gefahr des Abhebens und/oder des Durchrutschens am größten ist.In addition to the use of only one pair of friction rollers, which is arranged exclusively below the driven impeller 3a, it is of course also possible to arrange pairs of friction rollers among a plurality of impellers 3, in particular below all impellers 3 on the part of the lower flange 4a of the support 4, which the the hoist. 1 containing frame part 2a is opposite, since in these wheels 3 due to the shift in the center of gravity, the risk of lifting and / or slipping is greatest.

Das Einstellen der Reibrollen 10 des Reibrollenpaares über den Andrückmechanismus 16 geschieht wie folgt:The adjustment of the friction rollers 10 of the pair of friction rollers via the pressure mechanism 16 takes place as follows:

Der Bestrebung einiger Laufräder 3, 3a beim Betrieb ohne Nutzlast aufgrund der Verschiebung des Eigenlast-Schwerpunktes des Fahrwerkrahmens 2 vom Unterflansch abzuheben, wirken die an der Unterseite 4b des Unterflansches 4a anliegenden Reibrollen 10 entgegen.The aspiration of some wheels 3, 3a in operation without payload due to the shift of the self-load center of gravity of the chassis frame 2 from the bottom flange, counteract the voltage applied to the bottom 4b of the bottom flange 4a friction rollers 10.

In Abhängigkeit der Eigenmasse der Laufkatze und der Flanschbreite B des Unterflansches 4a des Trägers 4 wird die Druckfeder 16b des Andrückmechanismus 16 mehr oder weniger belastet. Durch Aufdrehen der Mutter 16c auf die Schraube 16a wird die Druckfeder 16b weiter verkürzt, bis das oberhalb des Stützgestänges 12 angeordnete angetriebene Laufrad 3a mit seiner Lauffläche in Kontakt mit dem Unterflansch 4a des Trägers 4 tritt. Dies ist die Nullstellung der Radiallast des angetriebenen Laufrades 3a.Depending on the net mass of the trolley and the flange width B of the lower flange 4a of the carrier 4, the compression spring 16b of the pressing mechanism 16 is more or less loaded. By turning the nut 16c on the screw 16a, the compression spring 16b is further shortened until the above the support rod 12 arranged driven impeller 3a occurs with its running surface in contact with the lower flange 4a of the support 4. This is the zero position of the radial load of the driven impeller 3a.

Um nun eine für den Vortrieb der Laufkatze ohne Nutzlast ausreichende Radiallast am angetriebenen Laufrad 3a zu erzeugen und so ein Durchrutschen zu vermeiden, wird die Druckfeder 16b weiter vorgespannt, bis das angetriebene Laufrad 3a beim Beschleunigen des Fahrantriebs 5 nicht mehr durchrutscht. In dieser Stellung hat die Druckfeder 16b des Andrückmechanismus 16 noch ausreichend Abstand zur maximalen Spannstellung, um durch weiteres Vorspannen auch bei feuchter oder öliger Lauffläche des Unterflansches 4a ein Durchrutschen zu vermeiden.In order now to generate a sufficient for the propulsion of the trolley without payload radial load on the driven impeller 3a and thus avoid slippage, the compression spring 16b is further biased until the driven impeller 3a no longer slips when accelerating the traction drive 5. In this position, the compression spring 16b of the pressure mechanism 16 still has sufficient distance to the maximum clamping position to avoid further slippage by further biasing even with wet or oily tread of the lower flange 4a.

Die Länge und Kennlinie der Druckfeder 16b können so gewählt werden, dass das Stützgestänge 12 und somit das Reibrollenpaar auf handelsübliche Flanschdicken einstellbar ist.The length and characteristic of the compression spring 16b can be chosen so that the support rod 12 and thus the pair of friction rollers on commercial flange thicknesses is adjustable.

Die voran stehend beschriebene Laufkatze zeichnet sich dadurch aus, dass die Reibrollenanordnung sehr kompakt, Platz sparend und einfach montierbar ausgebildet ist.The trolley described above is characterized in that the friction roller assembly is very compact, space-saving and easy to install.

Darüber hinaus kann in Verbindung mit einem frequenzgeregelten Fahrantrieb 5 das Hochlaufmoment und damit die Anfahrbeschleunigung geregelt und auf ein vertretbares Maß begrenzt werden, wodurch die Größe der Radiallast am angetriebenen Laufrad 3a gegenüber Lösungen ohne Frequenzumrichter erheblich verringert werden kann.In addition, in conjunction with a frequency-controlled drive 5, the acceleration torque and thus the starting acceleration can be controlled and limited to an acceptable level, whereby the size of the radial load on the driven impeller 3a can be significantly reduced compared to solutions without frequency converter.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Hubwerkhoist
1a1a
Seiltrommelcable drum
22
FahrwerkrahmenChassis & frame
2a2a
Rahmenteilframe part
2b2 B
Rahmenteilframe part
33
LaufradWheel
3a3a
angetriebenes Laufraddriven impeller
3b3b
Achseaxis
44
Trägercarrier
4a4a
Unterflanschlower flange
4b4b
Unterseitebottom
4c4c
Flankeflank
55
Fahrantriebtraction drive
66
Lasthakenload hook
77
Seilzugcable
88th
Traversetraverse
99
EinscherungsteilEinscherungsteil
1010
Reibrollefriction roller
1111
Führungsrolleleadership
1212
Stützgestängesupporting rod
1313
Achseaxis
1414
Hebellever
1515
Bohrungdrilling
1616
Andrückmechanismuspressing mechanism
16a16a
Schraubescrew
16b16b
Druckfedercompression spring
16c16c
Muttermother
1717
Distanzrohrspacer tube
1818
Stellringcollar
18a18a
GewindestiftSet screw
BB
FlanschbreitFlanschbreit

Claims (10)

  1. A travelling trolley comprising a running gear frame (2) having a hoisting gear (1), which running gear frame is mounted so as to be movable via running wheels (3, 3a) on a running rail of a substantially horizontally extending beam (4), at least one running wheel (3a) being drivable and a friction roller (10) cooperating with the driven running wheel (3a) being arranged on the underside (4b) of the running rail, a pair of friction rollers (10) being provided,
    characterised in that
    the friction rollers (10) may be placed against the underside (4b) of the running rail by way of an adjustment of the spacing from each other via a common pressing mechanism.
  2. A travelling trolley according to Claim 1, characterised in that the two friction rollers (10) of each friction roller pair are arranged underneath the running wheel (3a) symmetrically to the axis of rotation (3b) of the respective running wheel (3a).
  3. A travelling trolley according to Claim 1 or 2, characterised in that each friction roller pair may be secured to the running gear frame (2) via a supporting linkage (12).
  4. A travelling trolley according to Claim 3, characterised in that the supporting linkage (12) comprises two double-armed levers (14) pivotable about a common axis (13), a friction roller (10) being rotatably mounted at one free end of each lever (14).
  5. A travelling trolley according to Claim 4, characterised in that the other two free ends of the levers (14) of the supporting linkage (12) are joined together via a spring-loaded pressing mechanism (16).
  6. A travelling trolley according to Claim 5, characterised in that the pressing mechanism (16) consists of a screw (16a) joining together the two free ends of the levers (14) and a compression spring (16b) which may be fitted on the screw (16a) and tightened via a nut (16c).
  7. A travelling trolley according to at least one of Claims 3 to 6, characterised in that the supporting linkage (12) of each friction roller pair may be secured to a cross-beam (8) arranged on the running gear frame (2) transversely to the direction of travel.
  8. A travelling trolley according to Claim 7, characterised in that the supporting linkage (12) may be positioned on the cross-beam (8) via a spacer tube (17) which may be fitted on the cross-beam (8).
  9. A travelling trolley according to Claim 7, characterised in that the supporting linkage (12) may be positioned on the cross-beam (8) via an adjusting collar (18) which may be secured to the cross-beam (8).
  10. A travelling trolley according to at least one of Claims 1 to 9, characterised in that a non-driven friction roller pair is arranged underneath all running wheels (3) which are arranged in a line with the at least one driven running wheel (3a) in the direction of travel.
EP04022510A 2003-09-26 2004-09-22 Trolley, in particular monorail trolley with reduced height Active EP1518817B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10345102 2003-09-26
DE10345102A DE10345102B4 (en) 2003-09-26 2003-09-26 Trolley, in particular monorail cat with low height

Publications (3)

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EP1518817A2 EP1518817A2 (en) 2005-03-30
EP1518817A3 EP1518817A3 (en) 2006-03-29
EP1518817B1 true EP1518817B1 (en) 2007-06-20

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US (1) US7234400B2 (en)
EP (1) EP1518817B1 (en)
CN (1) CN100351165C (en)
AT (1) ATE365142T1 (en)
DE (2) DE10345102B4 (en)
ES (1) ES2289408T3 (en)

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Publication number Priority date Publication date Assignee Title
CN107311035A (en) * 2017-07-31 2017-11-03 江苏艾锐克起重装备有限公司 A kind of aluminium rail electric drive dolly

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EP1518817A2 (en) 2005-03-30
US20050092201A1 (en) 2005-05-05
DE10345102A1 (en) 2005-05-12
DE10345102B4 (en) 2005-09-29
US7234400B2 (en) 2007-06-26
CN1600667A (en) 2005-03-30
DE502004004124D1 (en) 2007-08-02
CN100351165C (en) 2007-11-28
EP1518817A3 (en) 2006-03-29
ATE365142T1 (en) 2007-07-15
ES2289408T3 (en) 2008-02-01

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