EP2625131B1 - Lifting device with a toothed belt - Google Patents

Lifting device with a toothed belt Download PDF

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Publication number
EP2625131B1
EP2625131B1 EP11764741.2A EP11764741A EP2625131B1 EP 2625131 B1 EP2625131 B1 EP 2625131B1 EP 11764741 A EP11764741 A EP 11764741A EP 2625131 B1 EP2625131 B1 EP 2625131B1
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EP
European Patent Office
Prior art keywords
toothed
belt
lifting device
toothed belt
output drive
Prior art date
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Active
Application number
EP11764741.2A
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German (de)
French (fr)
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EP2625131A1 (en
Inventor
Oliver Moll
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Demag Cranes and Components GmbH
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Demag Cranes and Components GmbH
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Publication of EP2625131A1 publication Critical patent/EP2625131A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/36—Guiding, or otherwise ensuring winding in an orderly manner, of ropes, cables, or chains
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details
    • B66D1/30—Rope, cable, or chain drums or barrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/18—Power-operated hoists
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/18—Power-operated hoists
    • B66D3/26—Other details, e.g. housings

Definitions

  • the invention relates to a toothed belt train for lifting and lowering of loads with a toothed belt driven by a driven gear and positively engaging with the driven wheel in a looping area.
  • corresponding chain hoists comprise a motorized drive unit, a transmission, an output shaft on which a sprocket is rotatably mounted, and a suspension means in the form of a chain for indirectly receiving the load to be moved.
  • the sprocket and the chain are positively engaged with each other. Due to the positive connection, a lifting force, which results from the drive-side and transmitted by the transmission torque, introduced into the chain.
  • the chain is connected at its one, seen from the sprocket from the load-side end with a freely suspended load-receiving means such as a load hook.
  • the other, unloaded chain end is located in a container-shaped chain memory, which receives the chain depending on the direction of rotation of the sprocket via an opening or releases.
  • a guide can be provided in the region of the sprocket to prevent snagging or jamming of the chain or individual chain links between sprocket and chain storage. For a reduction in wear, it is also common to lubricate the chain over its entire length.
  • elevator systems is a use of a belt-like support and propellant from the German patent application DE 10 2004 047 158 A1 known.
  • Corresponding elevator systems comprise an elevator car, which is guided and moved essentially in a straight line in the vertical direction in an elevator shaft.
  • the support and propellant used for this purpose is fixedly secured at one end to the bottom of the elevator shaft and at another end to a ceiling of the elevator shaft and is guided between the two ends via rotatably mounted deflection pulleys and a drive pulley.
  • some or all of the panes may be attached to the elevator car so as to be moved in a straight line in the vertical direction, whereas the remaining panes are fixed in place in the elevator shaft.
  • the carrying and blowing agent is designed in the manner of a toothed belt or V-ribbed belt whose teeth or V-ribs in contact with the peripheral surfaces of the discs stand.
  • the four provided for raising and lowering of loads support means are designed as a toothed belt.
  • the toothed belts are each fastened with a first end to a drum winch and are unwound from this alsbziehungrii.
  • This drum winch with its own drive has only the task of storing the timing belt.
  • the toothed belt is guided vertically downwards in the direction of the load to be lifted via a toothed belt pulley.
  • the four pulleys are synchronously driven by a common drive and initiate the lifting and cable forces in the timing belt.
  • the German patent application DE 39 11 292 A1 relates to a hoist for lifting and lowering of loads whose suspension means and the drive means driving the output gear are interchangeable.
  • the support means may be formed as a chain, flat rope, round rope or toothed belt and corresponding manner the output gear as a sprocket, pulley or timing belt pulley, so that optionally results in a chain hoist, cable or a toothed belt train.
  • a chain hoist serving as a support means guide is also provided.
  • the insert is disposed above the sprocket so as to prevent the chain from extruding out of the sprocket from the insert.
  • each toothed belt is positively and synchronously driven by a separate but drivingly connected output gear and in each case from a take-off or wound up.
  • each toothed belt is deflected via a first deflecting roller designated as a pressure roller and fed to the corresponding driven gear in its upper region.
  • a first deflecting roller designated as a pressure roller
  • the timing belt from the upper feed point of the driven wheels wrap around in a form-fitting manner in about half their circumference, a lower second guide pulley is arranged opposite each output gear of the upper first deflection roller opposite.
  • the lower second pressure rollers also ensure that the toothed belts in the vertical direction of the Off wheels or run on this.
  • the JP H03 9392 U discloses a three-strand cable with three einrilligen cable drums, each of which a rope is wound or unwound. In this case, each cable is guided in the region of the cable inlet or outlet of four guide rollers with respect to the respective cable groove of the cable drum.
  • the invention has for its object to provide an improved Zahnriemenzug.
  • an improved toothed belt train for lifting and lowering loads is driven by a toothed belt driven by a driven gear and positively engaging with the driven wheel in a wrap area such that at least three, preferably five to seven, seen one behind the other in the circumferential direction of the driven wheel, Guide rollers are arranged, which press the toothed belt in the wrap on the output gear and thus maintain the positive connection between the timing belt and the driven wheel.
  • Guide rollers are arranged, which press the toothed belt in the wrap on the output gear and thus maintain the positive connection between the timing belt and the driven wheel.
  • a possibly unintentionally reversed positive connection between the toothed belt and the driven wheel carries the risk of a load crash.
  • the safety of Zahnriemenzuges is advantageously increased by the fact that the wrap is at least 90 °, preferably 120 ° to 180 ° and particularly preferably 120 ° to 150 °.
  • a secure toothed belt guide via the driven wheel is further improved by the fact that the toothed belt in addition to guide rollers on additional deflection or guide rollers to the driven gear or can be discharged from this.
  • a load-bearing device is suspended on the toothed belt.
  • an advantageous embodiment is carried out such that the load-receiving means is freely suspended.
  • the load-carrying means is suspended at a first end of the toothed belt.
  • An alternative embodiment provides that the load-receiving means is formed in a single sheared embodiment as a bottom block.
  • the output gear rotatably seated on an output shaft and the output shaft is drivingly connected via a gear with a motor, in particular an electric motor connected.
  • An advantageous embodiment minimizes the risk of jamming or jamming through the use of a belt store which stores the toothed belt and is secured to the toothed belt train.
  • An improved embodiment in the way that in the belt store a rotatably mounted on a shaft storage roller is arranged, with which the toothed belt is connected at its second end and on which the toothed belt is wound, effected by an ordered storage of the toothed belt on the storage roll one especially reliable operation of the toothed belt train.
  • the winding process of the toothed belt can thereby be improved in an advantageous manner that the storage roller is connected via a torsion spring with the shaft in such a way that unwinding of the toothed belt tensioning the torsion spring and the toothed belt on the storage roll over from a wound toothed belt the force resulting from the energy stored in the tensioned torsion spring can be wound up.
  • the winding process of the toothed belt is alternatively improved in that the storage roller is drivingly connected to a winding motor, in particular an electric motor.
  • At least one guide roller leads the timing belt from the belt store to the driven gear and at least two guide rollers lead the timing belt away from the output gear, wherein the guide roller and the guide rollers on a housing of Zahnriemenzugs are attached.
  • FIG. 1 is a toothed belt train 1 with a functioning as a tensile or suspension means toothed belt 2 with belt teeth 2c shown.
  • the toothed belt train 1 is driven by a motor 3, preferably an electric motor.
  • the drive power applied by the engine 3 is transmitted via an unillustrated transmission 4 (see FIG. 3 ) and a not shown output gear 4a (see FIG. 2 ) are positively transferred to the toothed belt 2.
  • the motor 3 is flanged to a housing 5, the installation space in the longitudinal section, not shown, is H-shaped, so that the installation space is separated by a load-bearing wall in two mounting space halves.
  • the installation space halves are each open at the side facing away from the wall.
  • the toothed belt 2 is from a belt store 6, not shown in detail (see FIG. 2 ) stored, which is laterally attached to the housing 5, and released or received depending on the direction of rotation of the motor 3 and the driven gear 4a.
  • the toothed belt train 1 is designed to be single-stranded, so that the toothed belt 2 has a first free-hanging end 2a, to which a load-receiving means 7 is fastened.
  • FIG. 2 shows a partially broken view of the toothed belt train 1 of FIG. 1 , in particular a detailed representation of the guidance of the toothed belt 2 in the toothed belt train 1.
  • the toothed belt 2 is fastened with its second end 2b to a storage roller 6a, which is rotatably mounted within the belt store 6 on a shaft 6b.
  • the shaft 6b is mounted in a container-like storage housing 6d.
  • the storage roller 6a is connected via a torsion spring 6c to the shaft 6b in such a way that, starting from the toothed belt 2 wound on the storage roller 6a, unwinding of the toothed belt 2 biases the torsion spring 6c and thus according to the principle known from a roller shutter winder the toothed belt 2 can be rolled up again on the storage roller 6a via the force resulting from the energy stored in the tensioned torsion spring 6c.
  • the toothed belt 2 leaves the belt store 6 or its storage housing 6d in the direction of the housing 5 and is guided by means of a deflection roller 9, which is rotatably mounted on the housing 5, from the belt store 6 into the housing 5 and arranged therein Output gear 4a supplied laterally.
  • the output gear 4a is non-rotatably connected to the output shaft 4b, which is connected to the transmission 4, not shown (see FIG. 3 ) cooperates, connected and rotatably mounted on the housing 5.
  • the radially encircling surface of the output gear 4a has a profiling, which is complementary to the surface contour of the toothed belt 2, preferably in the form of wheel teeth 4c.
  • the guidance of the toothed belt 2 is supported on the output gear 4a by a total of seven guide rollers 10.
  • the guide rollers 10 are positioned in the region of the driven gear 4a and spaced approximately over the upper half of the wheel circumference distributed such that each other In this area, the toothed belt 2 supplied between the guide rollers 10 and the output gear 4a is brought into positive engagement with its profiled side with the wheel teeth 4c of the output gear 4a.
  • the wrap-around region, in which the positive-engagement engagement is made extends over at least 90 °, but preferably 120 ° to 180 °, and particularly preferably 120 ° to 150 °, with respect to an imaginary rotation about the axis of rotation of the driven wheel 4a.
  • At least two guide rollers 10 are provided over each 30 ° comprehensive portion of the belt.
  • the toothed belt 2 is guided by the guide rollers 10 so over the rotating output gear 4a, that the free first end 2a of the toothed belt 2 on the side facing away from the storage roller 6a side leaves the output gear 4a and is released in the vertical direction down again.
  • the output gear 4a is preferably designed as a toothed belt pulley.
  • the release of the toothed belt 2 is assisted by a stripping element 12b, which is fastened in the housing 5 in the region of the lower half driven gear 4a such that the positive connection is interrupted by a splitting wedge effect of the correspondingly formed geometry of the stripping element 12b.
  • the load suspended on the load receiving means 7 is sufficient to allow the toothed belt 2 to run off the driven gear 4a safely.
  • a cassette wall 12a connected to the wiper element 12b whose function is shown in FIG FIG. 3 is described in detail.
  • the released toothed belt 2 is led out below the output gear 4a between arranged at the bottom of the housing 5 guide rollers 11 in a vertical downward direction out of the housing 5.
  • the load-receiving means 7 is attached.
  • the axes of rotation of the output shaft 4b, the shaft 6b, the guide roller 9, the guide rollers 10 and the guide rollers 11 are preferably aligned parallel to each other.
  • FIG. 3 shows a front view of FIG. 2 in partial section AB, in which a cassette 12 with cassette walls 12a as an advantageous embodiment for rotatably supporting the rollers 9 (see FIG. 2 ), FIGS. 10 and 11. Only one roller 10 and 11 is shown in section.
  • the cassette 12 is detachable on the output shaft 4b and the output gear 4a (see FIG FIG. 2 ) floating mounted unit and includes in addition to the rollers 9, 10 and 11, the driven gear 4a and the scraper element 12b (see FIG. 2 ).
  • the cassette walls 12a have bearing openings by means of which the rollers 9, 10 and 11 are positioned and rotatably supported between two cassette walls 12a.
  • the stripping element 12b attached to at least one of the cassette walls 12a secures the driven wheel 4a unsecured between the stripping element 12b and the guide rollers 10 against vertical falling out of the area of the roughly semicircular guide rollers 10.
  • the output gear 4a is prepositioned approximately concentrically with respect to receiving openings for the passage of the output shaft 4b between the cassette walls 12a.
  • the cassette 12 is seated within the housing 5 on the cooperating with the gear 4 output shaft 4b, which is guided through the receiving opening at least the gear 4 facing cassette wall 12a, wherein the connection between the output shaft 4b and the output gear 4a is preferably realized by positive engagement.
  • the cassette 12 is axially secured via the output gear 4a on the output shaft 4b, for example, by a 4d sitting on the free, ie the end of the output shaft 4b facing away from the transmission 4b.
  • the cassette 12 is secured against rotation by means of at least one pin 13 which protrudes laterally from the cassette 12 and which is supported on recesses provided in the housing 5.
  • the housing 5 thus acts as an abutment, in particular for the guide rollers 10 and is therefore not taken away from the rotating output gear 4a.
  • the timing belt 2 is in the in FIG.
  • the invention also relates to a multi-stranded embodiment, in particular with a trained as a bottom load receiving means 7 in a simple sworded embodiment, wherein the first end 2a of the toothed belt 2 is not freely suspended, but firmly connected to the housing 5.
  • the belt store 6 with respect to the illustrated embodiment, in particular below the housing 5 with the chain memory of conventional chain hoists.
  • the winding of the toothed belt 2 via a winding motor, preferably by means of a standstill motor or a slip clutch, instead of via a torsion spring 6c.
  • the belt store 6 as a conventional chain store for chaotically receiving the toothed belt 2, so that the toothed belt 2 is not wound up, but is merely pressed out of the drive wheel 4a in disorder in the belt store.
  • a corresponding bearing can be made directly on the housing 5, that is to say in a form not combined as a removable structural unit.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Transmission Devices (AREA)

Description

Die Erfindung betrifft einen Zahnriemenzug zum Heben und Senken von Lasten mit einem von einem Abtriebsrad angetriebenen und formschlüssig mit dem Abtriebsrad in einem Umschlingungsbereich im Eingriff stehenden Zahnriemen.The invention relates to a toothed belt train for lifting and lowering of loads with a toothed belt driven by a driven gear and positively engaging with the driven wheel in a looping area.

Aus der deutschen Patentschrift DE 103 35 984 B4 sind Kettenzüge zum Heben und Senken von Lasten bekannt. Im Wesentlichen umfassen entsprechende Kettenzüge eine motorisierte Antriebseinheit, ein Getriebe, eine Abtriebswelle, auf der ein Kettenrad drehbar gelagert ist, sowie ein Tragmittel in Form einer Kette für die mittelbare Aufnahme der zu bewegenden Last. Das Kettenrad und die Kette stehen formschlüssig im Eingriff miteinander. Durch den Formschluss wird eine Hubkraft, die aus dem antriebseitigen und durch das Getriebe übertragenen Drehmoment resultiert, in die Kette eingeleitet. Die Kette ist an ihrem einen, vom Kettenrad aus gesehen lastseitigen Ende mit einem frei hängenden Lastaufnahmemittel wie einem Lasthaken verbunden. Das andere, unbelastete Kettenende befindet sich in einem behälterförmigen Kettenspeicher, der die Kette je nach Drehrichtung des Kettenrades über eine Öffnung aufnimmt beziehungsweise freigibt. Außerdem kann eine Führung im Bereich des Kettenrades vorgesehen werden, um ein Verhaken oder Verklemmen der Kette beziehungsweise einzelner Kettenglieder zwischen Kettenrad und Kettenspeicher zu verhindern. Für eine Verschleißminderung ist es zudem üblich, die Kette über die gesamte Länge zu schmieren.From the German patent DE 103 35 984 B4 chain hoists are known for lifting and lowering loads. In essence, corresponding chain hoists comprise a motorized drive unit, a transmission, an output shaft on which a sprocket is rotatably mounted, and a suspension means in the form of a chain for indirectly receiving the load to be moved. The sprocket and the chain are positively engaged with each other. Due to the positive connection, a lifting force, which results from the drive-side and transmitted by the transmission torque, introduced into the chain. The chain is connected at its one, seen from the sprocket from the load-side end with a freely suspended load-receiving means such as a load hook. The other, unloaded chain end is located in a container-shaped chain memory, which receives the chain depending on the direction of rotation of the sprocket via an opening or releases. In addition, a guide can be provided in the region of the sprocket to prevent snagging or jamming of the chain or individual chain links between sprocket and chain storage. For a reduction in wear, it is also common to lubricate the chain over its entire length.

Für Aufzugsysteme ist ein Einsatz eines riemenartigen Trag- und Treibmittels aus der deutschen Offenlegungsschrift DE 10 2004 047 158 A1 bekannt. Entsprechende Aufzugsysteme umfassen eine Aufzugkabine, die im Wesentlichen geradlinig in vertikaler Richtung in einem Aufzugsschacht geführt und bewegt wird. Das hierfür eingesetzte Trag- und Treibmittel ist an einem Ende am Boden des Aufzugsschachtes und an einem anderen Ende an einer Decke des Aufzugsschachtes ortsfest befestigt und wird zwischen den beiden Enden über drehbar gelagerte Umlenkscheiben und eine Antriebsscheibe geführt. In den dort beschriebenen Ausführungsformen können einige oder alle Scheiben an der Aufzugskabine befestigt sein, so dass sie geradlinig in vertikaler Richtung mitbewegt werden, wohingegen die übrigen Scheiben ortsfest im Aufzugsschacht befestigt sind. Das Trag- und Treibmittel ist nach Art eines Zahnriemens oder Keilrippenriemens ausgebildet, deren Zähne beziehungsweise Keilrippen in Kontakt mit den umlaufenden Oberflächen der Scheiben stehen.For elevator systems is a use of a belt-like support and propellant from the German patent application DE 10 2004 047 158 A1 known. Corresponding elevator systems comprise an elevator car, which is guided and moved essentially in a straight line in the vertical direction in an elevator shaft. The support and propellant used for this purpose is fixedly secured at one end to the bottom of the elevator shaft and at another end to a ceiling of the elevator shaft and is guided between the two ends via rotatably mounted deflection pulleys and a drive pulley. In the embodiments described there, some or all of the panes may be attached to the elevator car so as to be moved in a straight line in the vertical direction, whereas the remaining panes are fixed in place in the elevator shaft. The carrying and blowing agent is designed in the manner of a toothed belt or V-ribbed belt whose teeth or V-ribs in contact with the peripheral surfaces of the discs stand.

Des Weiteren ist aus der japanischen Offenlegungsschrift JP 2005 022 791 A ein viersträngiges Hebezeug bekannt, dessen vier zum Heben und Senken von Lasten vorgesehene Tragmittel als Zahnriemen ausgebildet sind. Die Zahnriemen sind jeweils mit einem ersten Ende an einer Trommelwinde befestigt und werden von dieser aufbeziehungsweise abgewickelt. Diese Trommelwinde mit ihrem eigenen Antrieb hat nur die Aufgabe, den Zahnriemen zu speichern. Ausgehend von der Trommelwinde wird der Zahnriemen jeweils über eine Zahnriemenscheibe vertikal nach unten in Richtung der zu hebenden Last geführt. Die insgesamt vier Zahnriemenscheiben sind von einem gemeinsamen Antrieb synchron angetrieben und leiten die Hub- und Seilkräfte in die Zahnriemen ein.Furthermore, from the Japanese Patent Application JP 2005 022 791 A a four-strand hoist known, the four provided for raising and lowering of loads support means are designed as a toothed belt. The toothed belts are each fastened with a first end to a drum winch and are unwound from this aufbziehungsweise. This drum winch with its own drive has only the task of storing the timing belt. Starting from the drum winch, the toothed belt is guided vertically downwards in the direction of the load to be lifted via a toothed belt pulley. The four pulleys are synchronously driven by a common drive and initiate the lifting and cable forces in the timing belt.

Die deutsche Offenlegungsschrift DE 39 11 292 A1 betrifft ein Hebezeug zum Heben und Senken von Lasten, dessen Tragmittel sowie das das Tragmittel antreibende Abtriebsrad austauschbar sind. Beispielsweise kann das Tragmittel als Kette, Flachseil, Rundseil oder als Zahnriemen und entsprechender Weise das Abtriebsrad als Kettenrad, Seilscheibe oder Zahnriemenrolle ausgebildet sein, so dass sich wahlweise ein Kettenzug, Seilzug oder ein Zahnriemenzug ergibt. Für die Ausführung als Kettenzug ist weiterhin ein als Tragmittelführung dienender Einsatz vorgesehen. Der Einsatz ist oberhalb des Kettenrades derart angeordnet, dass ein Herausdrängen der Kette aus dem Kettenrad von dem Einsatz verhindert wird.The German patent application DE 39 11 292 A1 relates to a hoist for lifting and lowering of loads whose suspension means and the drive means driving the output gear are interchangeable. For example, the support means may be formed as a chain, flat rope, round rope or toothed belt and corresponding manner the output gear as a sprocket, pulley or timing belt pulley, so that optionally results in a chain hoist, cable or a toothed belt train. For execution as a chain hoist serving as a support means guide is also provided. The insert is disposed above the sprocket so as to prevent the chain from extruding out of the sprocket from the insert.

In der deutschen Offenlegungsschrift DE 196 13 037 A1 ist eine zweisträngige Bühnenwinde mit zwei als Zahnriemen ausgebildeten Tragmitteln beschrieben. Jeder Zahnriemen wird von einem separaten aber antriebsmäßig miteinander verbundenen Abtriebsrad formschlüssig sowie synchron angetrieben und hierbei jeweils von einer Aufwickelvorrichtung ab- beziehungsweise aufgewickelt. Ausgehend von den oberhalb der Abtriebsräder angeordneten Aufwickelvorrichtungen wird jeder Zahnriemen über eine erste als Andrückrolle bezeichnete Umlenkrolle umgelenkt und dem entsprechenden Abtriebsrad in dessen oberen Bereich zugeführt. Damit die Zahnriemen von dem oberen Zuführpunkt aus die Abtriebsräder in etwa über deren halben Umfang formschlüssig umschlingen, ist an jedem Abtriebsrad der oberen ersten Umlenkrolle gegenüberliegend eine untere zweite Umlenkrolle angeordnet. Über die unteren zweiten Andrückrollen wird außerdem sichergestellt, dass die Zahnriemen in vertikaler Richtung von den Abtriebsrädem ab- beziehungsweise auf diese zulaufen.In the German Offenlegungsschrift DE 196 13 037 A1 is a two-strand stage winch described with two designed as a toothed belt suspension means. Each toothed belt is positively and synchronously driven by a separate but drivingly connected output gear and in each case from a take-off or wound up. Starting from the wind-up devices arranged above the driven wheels, each toothed belt is deflected via a first deflecting roller designated as a pressure roller and fed to the corresponding driven gear in its upper region. Thus, the timing belt from the upper feed point of the driven wheels wrap around in a form-fitting manner in about half their circumference, a lower second guide pulley is arranged opposite each output gear of the upper first deflection roller opposite. The lower second pressure rollers also ensure that the toothed belts in the vertical direction of the Off wheels or run on this.

Aus der deutschen Patentschrift DE 37 28 494 C1 ist eine in der Bau- und Forstwirtschaft sowie als Bergewinde eingesetzte Seilzugmaschine mit einer angetriebenen Seilscheibe bekannt. Die Seilscheibe weist eine Seilrille auf, in der ein Seil über eine Seilandrückrolle und Gleitstücke geführt ist.From the German patent DE 37 28 494 C1 is known in construction and forestry and used as a Bergewinde pull-rope machine with a driven sheave known. The pulley has a rope groove in which a rope is guided over a Seilandrückrolle and sliders.

Die JP H03 9392 U offenbart einen dreisträngigen Seilzug mit drei einrilligen Seiltrommeln, von denen jeweils ein Seil auf- beziehungsweise abgewickelt wird. Hierbei wird jedes Seil im Bereich des Seilein- beziehungsweise -ablaufes von vier Führungsrollen in Bezug auf die jeweilige Seilrille der Seiltrommel geführt.The JP H03 9392 U discloses a three-strand cable with three einrilligen cable drums, each of which a rope is wound or unwound. In this case, each cable is guided in the region of the cable inlet or outlet of four guide rollers with respect to the respective cable groove of the cable drum.

Der Erfindung liegt die Aufgabe zugrunde, einen verbesserten Zahnriemenzug bereit zu stellen.The invention has for its object to provide an improved Zahnriemenzug.

Diese Aufgabe wird durch einen Zahnriemenzug mit den Merkmalen des Anspruchs 1 gelöst. In den Unteransprüchen 2 bis 14 sind vorteilhafte Ausgestaltungen der Erfindung angegeben.This object is achieved by a toothed belt train with the features of claim 1. In the dependent claims 2 to 14 advantageous embodiments of the invention are given.

Erfindungsgemäß wird ein verbesserter Zahnriemenzug zum Heben und Senken von Lasten mit einem von einem Abtriebsrad angetriebenen und formschlüssig mit dem Abtriebsrad in einem Umschlingungsbereich im Eingriff stehenden Zahnriemen dadurch erreicht, dass in dem Umschlingungsbereich in Umfangsrichtung des Abtriebsrades gesehen hintereinander mindestens drei, vorzugsweise fünf bis sieben, Führungsrollen angeordnet sind, die den Zahnriemen in dem Umschlingungsbereich an das Abtriebsrad andrücken und somit den Formschluss zwischen dem Zahnriemen und dem Abtriebsrad aufrechterhalten. Ein möglicherweise unbeabsichtigt aufgehobener Formschluss zwischen dem Zahnriemen und dem Abtriebsrad birgt die Gefahr eines Lastabsturzes. Durch die Sicherung des Formschlusses mittels entsprechender Führungsrollen wird dies in vorteilhafter Weise verhindert, so dass auch ein sicheres Heben und Senken von schweren Lasten mit einem Zahnriemenzug möglich ist. Insbesondere wird durch eine entsprechende Anordnung von Führungsrollen ein gleichmäßiger Formschluss über den gesamten Umschlingungsbereich erreicht..In accordance with the invention, an improved toothed belt train for lifting and lowering loads is driven by a toothed belt driven by a driven gear and positively engaging with the driven wheel in a wrap area such that at least three, preferably five to seven, seen one behind the other in the circumferential direction of the driven wheel, Guide rollers are arranged, which press the toothed belt in the wrap on the output gear and thus maintain the positive connection between the timing belt and the driven wheel. A possibly unintentionally reversed positive connection between the toothed belt and the driven wheel carries the risk of a load crash. By securing the positive engagement by means of appropriate guide rollers this is advantageously prevented, so that a safe lifting and lowering of heavy loads with a toothed belt train is possible. In particular, by means of a corresponding arrangement of guide rollers, a uniform form fit is achieved over the entire looping area.

In konstruktiv einfacher Bauweise ist vorgesehen, dass in Umfangsrichtung des Abtriebsrades gesehen zwei benachbarte Führungsrollen höchstens über 30° des Umschlingungsbereichs voneinander beabstandet sind.In a structurally simple design is provided that in the circumferential direction of the Output gear seen two adjacent guide rollers spaced apart from each other at most over 30 ° of the belt.

Die Sicherheit des Zahnriemenzuges wird in vorteilhafter Weise dadurch erhöht, dass der Umschlingungsbereich mindestens 90°, vorzugsweise 120° bis 180° und besonders vorzugsweise 120° bis 150°, beträgt.The safety of Zahnriemenzuges is advantageously increased by the fact that the wrap is at least 90 °, preferably 120 ° to 180 ° and particularly preferably 120 ° to 150 °.

Eine sichere Zahnriemenführung über das Abtriebsrad wird weiter dadurch verbessert, dass der Zahnriemen neben Führungsrollen über zusätzliche Umlenk- oder Leitrollen dem Abtriebsrad zu- oder von diesem abführbar ist.A secure toothed belt guide via the driven wheel is further improved by the fact that the toothed belt in addition to guide rollers on additional deflection or guide rollers to the driven gear or can be discharged from this.

Für ein sicheres Anschlagen zu hebender Lasten ist an dem Zahnriemen ein Lastaufnahmemittel aufgehängt.For safe striking of loads to be lifted, a load-bearing device is suspended on the toothed belt.

Um ein flexibles Anschlagen zu hebender Lasten zu ermöglichen, erfolgt eine vorteilhafte Ausgestaltung derart, dass das Lastaufnahmemittel frei hängend ist.In order to allow a flexible striking to be lifted loads, an advantageous embodiment is carried out such that the load-receiving means is freely suspended.

In konstruktiv einfacher Bauweise ist das Lastaufnahmemittel an einem ersten Ende des Zahnriemens aufgehängt.In a structurally simple design, the load-carrying means is suspended at a first end of the toothed belt.

Eine alternative Ausführungsform sieht vor, dass das Lastaufnahmemittel in einer einfach eingescherten Ausführungsform als Unterflasche ausgebildet ist.An alternative embodiment provides that the load-receiving means is formed in a single sheared embodiment as a bottom block.

Besonders vorteilhaft ist, dass das Abtriebsrad drehfest auf einer Abtriebswelle sitzt und die Abtriebswelle über ein Getriebe antriebsmäßig mit einem Motor, insbesondere einem Elektromotor, verbunden ist.It is particularly advantageous that the output gear rotatably seated on an output shaft and the output shaft is drivingly connected via a gear with a motor, in particular an electric motor connected.

Eine vorteilhafte Ausführungsform minimiert durch die Verwendung eines Riemenspeichers, der den Zahnriemen bevorratet und an dem Zahnriemenzug befestigt ist, die Gefahr eines Verkantens oder Verklemmens.An advantageous embodiment minimizes the risk of jamming or jamming through the use of a belt store which stores the toothed belt and is secured to the toothed belt train.

Eine verbesserte Ausgestaltung in der Art, dass in dem Riemenspeicher eine auf einer Welle drehbar gelagerte Speicherrolle angeordnet ist, mit der der Zahnriemen an seinem zweiten Ende verbunden ist und auf der der Zahnriemen aufwickelbar ist, bewirkt durch eine geordnete Bevorratung des Zahnriemens auf der Speicherrolle einen besonders zuverlässigen Betrieb des Zahnriemenzugs.An improved embodiment in the way that in the belt store a rotatably mounted on a shaft storage roller is arranged, with which the toothed belt is connected at its second end and on which the toothed belt is wound, effected by an ordered storage of the toothed belt on the storage roll one especially reliable operation of the toothed belt train.

In weiterer Ausgestaltung lässt sich der Aufwickelvorgang des Zahnriemens dadurch in vorteilhafter Weise verbessern, dass die Speicherrolle über eine Drehfeder mit der Welle in der Art verbunden ist, dass ausgehend von einem aufgewickelten Zahnriemen ein Abwickeln des Zahnriemens die Drehfeder spannt und der Zahnriemen auf der Speicherrolle über die aus der in der gespannten Drehfeder gespeicherten Energie resultierende Kraft aufwickelbar ist.In a further embodiment, the winding process of the toothed belt can thereby be improved in an advantageous manner that the storage roller is connected via a torsion spring with the shaft in such a way that unwinding of the toothed belt tensioning the torsion spring and the toothed belt on the storage roll over from a wound toothed belt the force resulting from the energy stored in the tensioned torsion spring can be wound up.

Der Aufwickelvorgang des Zahnriemens wird alternativ dadurch verbessert, dass die Speicherrolle antriebsmäßig mit einem Wickel-Motor, insbesondere einem Elektromotor, verbunden ist.The winding process of the toothed belt is alternatively improved in that the storage roller is drivingly connected to a winding motor, in particular an electric motor.

Besonders vorteilhaft für eine erhöhte und stabile Laufruhe des Zahnriemens während des Betriebs des Zahnriemenzugs ist, dass mindestens eine Umlenkrolle den Zahnriemen ausgehend vom Riemenspeicher zum Abtriebsrad hinführt und mindestens zwei Leitrollen den Zahnriemen vom Abtriebsrad wegführen, wobei die Umlenkrolle und die Leitrollen an einem Gehäuse des Zahnriemenzugs befestigt sind.Particularly advantageous for an increased and stable running smoothness of the toothed belt during operation of the toothed belt train is that at least one guide roller leads the timing belt from the belt store to the driven gear and at least two guide rollers lead the timing belt away from the output gear, wherein the guide roller and the guide rollers on a housing of Zahnriemenzugs are attached.

Ein Ausführungsbeispiel der Erfindung wird anhand der nachfolgenden Beschreibung näher erläutert. Es zeigen:

  • Figur 1 eine Ansicht eines erfindungsgemäßen Zahnriemenzuges,
  • Figur 2 eine teilgeschnittene Ansicht von Figur 1 und
  • Figur 3 eine Vorderansicht von Figur 2 im Teilschnitt A-B.
An embodiment of the invention will be explained in more detail with reference to the following description. Show it:
  • FIG. 1 a view of a toothed belt train according to the invention,
  • FIG. 2 a partially sectioned view of FIG. 1 and
  • FIG. 3 a front view of FIG. 2 in partial section AB.

In Figur 1 ist ein Zahnriemenzug 1 mit einem als Zug- beziehungsweise Tragmittel fungierenden Zahnriemen 2 mit Riemenzähnen 2c gezeigt. Der Zahnriemenzug 1 wird von einem Motor 3, vorzugsweise einem Elektromotor, angetrieben. Die vom Motor 3 aufgebrachte Antriebsleistung wird über ein nicht abgebildetes Getriebe 4 (siehe Figur 3) sowie ein nicht abgebildetes Abtriebsrad 4a (siehe Figur 2) formschlüssig auf den Zahnriemen 2 übertragen. Der Motor 3 ist an ein Gehäuse 5 angeflanscht, dessen Einbauraum im nicht dargestellten Längsschnitt H-förmig ausgebildet ist, so dass der Einbauraum durch eine tragende Wand in zwei Einbauraumhälften getrennt ist. Die Einbauraumhälften sind jeweils an den von der Wand abgewandten Seiten offen. In der einen Einbauraumhälfte ist das Getriebe 4 und in der anderen Einbauraumhälfte das Abtriebsrad 4a aufgenommen. Die Einbauraumhälften sind durch entsprechende Deckel verschließbar. Der Zahnriemen 2 wird von einem nicht im Detail dargestellten Riemenspeicher 6 (siehe Figur 2) bevorratet, der seitlich an dem Gehäuse 5 befestigt ist, und je nach Drehrichtung des Motors 3 beziehungsweise des Abtriebsrads 4a freigegeben oder aufgenommen. Der Zahnriemenzug 1 ist einsträngig ausgebildet, so dass der Zahnriemen 2 ein erstes frei hängendes Ende 2a aufweist, an dem ein Lastaufnahmemittel 7 befestigt ist. Mittels eines an der Oberseite des Zahnriemenzuges 1, insbesondere dessen Gehäuses 5, befestigten Aufhängelementes 8 kann der Zahnriemenzug 1 an einem nicht dargestellten Tragelement aufgehängt werden.In FIG. 1 is a toothed belt train 1 with a functioning as a tensile or suspension means toothed belt 2 with belt teeth 2c shown. The toothed belt train 1 is driven by a motor 3, preferably an electric motor. The drive power applied by the engine 3 is transmitted via an unillustrated transmission 4 (see FIG. 3 ) and a not shown output gear 4a (see FIG. 2 ) are positively transferred to the toothed belt 2. The motor 3 is flanged to a housing 5, the installation space in the longitudinal section, not shown, is H-shaped, so that the installation space is separated by a load-bearing wall in two mounting space halves. The installation space halves are each open at the side facing away from the wall. In the one half of the installation space is the gear 4 and in the other half of the installation space the driven gear 4a was added. The installation space halves can be closed by appropriate cover. The toothed belt 2 is from a belt store 6, not shown in detail (see FIG. 2 ) stored, which is laterally attached to the housing 5, and released or received depending on the direction of rotation of the motor 3 and the driven gear 4a. The toothed belt train 1 is designed to be single-stranded, so that the toothed belt 2 has a first free-hanging end 2a, to which a load-receiving means 7 is fastened. By means of a at the top of the toothed belt train 1, in particular its housing 5, attached suspension element 8 of the toothed belt train 1 can be suspended on a supporting element, not shown.

Die Figur 2 zeigt eine teilweise aufgebrochene Ansicht des Zahnriemenzugs 1 von Figur 1, insbesondere eine detaillierte Darstellung der Führung des Zahnriemens 2 in dem Zahnriemenzug 1. Der Zahnriemen 2 ist mit seinem zweiten Ende 2b an einer Speicherrolle 6a befestigt, die innerhalb des Riemenspeichers 6 auf einer Welle 6b drehbar gelagert ist. Die Welle 6b ist in einem behälterartigen Speichergehäuse 6d gelagert. Die Speicherrolle 6a ist über eine Drehfeder 6c mit der Welle 6b in der Art verbunden, dass ausgehend von dem Zahnriemen 2, der auf der Speicherrolle 6a aufgewickelt ist, ein Abwickeln des Zahnriemens 2 die Drehfeder 6c spannt und somit nach dem von einem Rolladengurtaufwickler bekannten Prinzip der Zahnriemen 2 über die aus der in der gespannten Drehfeder 6c gespeicherten Energie resultierende Kraft wieder auf der Speicherrolle 6a aufgerollt werden kann.The FIG. 2 shows a partially broken view of the toothed belt train 1 of FIG. 1 , in particular a detailed representation of the guidance of the toothed belt 2 in the toothed belt train 1. The toothed belt 2 is fastened with its second end 2b to a storage roller 6a, which is rotatably mounted within the belt store 6 on a shaft 6b. The shaft 6b is mounted in a container-like storage housing 6d. The storage roller 6a is connected via a torsion spring 6c to the shaft 6b in such a way that, starting from the toothed belt 2 wound on the storage roller 6a, unwinding of the toothed belt 2 biases the torsion spring 6c and thus according to the principle known from a roller shutter winder the toothed belt 2 can be rolled up again on the storage roller 6a via the force resulting from the energy stored in the tensioned torsion spring 6c.

Ausgehend von der Speicherrolle 6a verlässt der Zahnriemen 2 den Riemenspeicher 6 beziehungsweise dessen Speichergehäuse 6d in Richtung des Gehäuses 5 und wird mittels einer Umlenkrolle 9, die an dem Gehäuse 5 drehbar gelagert ist, aus dem Riemenspeicher 6 in das Gehäuse 5 gelenkt und dem darin angeordneten Abtriebsrad 4a seitlich zugeführt. Das Abtriebsrad 4a ist drehfest mit der Abtriebswelle 4b, die mit dem nicht dargestellten Getriebe 4 (siehe Figur 3) zusammenwirkt, verbunden und drehbar an dem Gehäuse 5 gelagert. Die radial umlaufende Oberfläche des Abtriebsrads 4a weist eine komplementär zur Oberflächenkontur des Zahnriemens 2 ausgebildete Profilierung, vorzugsweise in Form von Radzähnen 4c, auf. Weiterhin wird die Führung des Zahnriemens 2 auf dem Abtriebsrad 4a durch insgesamt sieben Führungsrollen 10 unterstützt. Die Führungsrollen 10 sind im Bereich des Abtriebsrads 4a positioniert und in etwa über dessen oberen halben Radumfang verteilt derart zueinander beabstandet, dass in diesem Bereich der zwischen den Führungsrollen 10 und dem Abtriebsrad 4a zugeführte Zahnriemen 2 mit seiner profilierten Seite mit den Radzähnen 4c des Abtriebsrads 4a formschlüssig in Eingriff gebracht wird. Der Umschlingungsbereich, in dem der formschlüssige Eingriff hergestellt ist, erstreckt sich bezogen auf eine gedachte Drehung um die Drehachse des Abtriebsrades 4a über mindestens 90°, vorzugsweise jedoch 120° bis 180° und besonders vorzugsweise 120° bis 150°. Damit über den gesamten Umschlingungsbereich eine gleichmäßige Führung beziehungsweise ein gleichmäßiges Andrücken des Zahnriemens 2 an das Abtriebsrad 4a gewährleistet ist, sind über jeden 30° umfassenden Teilbereich des Umschlingungsbereichs mindestens zwei Führungsrollen 10 vorgesehen. Der Zahnriemen 2 wird durch die Führungsrollen 10 so über das rotierende Abtriebsrad 4a geführt, dass das freie erste Ende 2a des Zahnriemens 2 auf der von der Speicherrolle 6a abgewandten Seite das Abtriebsrad 4a verlässt und in vertikaler Richtung nach unten wieder freigegeben wird. Das Abtriebsrad 4a ist vorzugsweise als Zahnriemenscheibe ausgebildet.Starting from the storage roller 6a, the toothed belt 2 leaves the belt store 6 or its storage housing 6d in the direction of the housing 5 and is guided by means of a deflection roller 9, which is rotatably mounted on the housing 5, from the belt store 6 into the housing 5 and arranged therein Output gear 4a supplied laterally. The output gear 4a is non-rotatably connected to the output shaft 4b, which is connected to the transmission 4, not shown (see FIG. 3 ) cooperates, connected and rotatably mounted on the housing 5. The radially encircling surface of the output gear 4a has a profiling, which is complementary to the surface contour of the toothed belt 2, preferably in the form of wheel teeth 4c. Furthermore, the guidance of the toothed belt 2 is supported on the output gear 4a by a total of seven guide rollers 10. The guide rollers 10 are positioned in the region of the driven gear 4a and spaced approximately over the upper half of the wheel circumference distributed such that each other In this area, the toothed belt 2 supplied between the guide rollers 10 and the output gear 4a is brought into positive engagement with its profiled side with the wheel teeth 4c of the output gear 4a. The wrap-around region, in which the positive-engagement engagement is made, extends over at least 90 °, but preferably 120 ° to 180 °, and particularly preferably 120 ° to 150 °, with respect to an imaginary rotation about the axis of rotation of the driven wheel 4a. In order to ensure a uniform guidance or a uniform pressing of the toothed belt 2 on the output gear 4a over the entire looping area, at least two guide rollers 10 are provided over each 30 ° comprehensive portion of the belt. The toothed belt 2 is guided by the guide rollers 10 so over the rotating output gear 4a, that the free first end 2a of the toothed belt 2 on the side facing away from the storage roller 6a side leaves the output gear 4a and is released in the vertical direction down again. The output gear 4a is preferably designed as a toothed belt pulley.

Das Freigeben des Zahnriemens 2 wird durch ein Abstreifelement 12b unterstützt, das im Gehäuse 5 im Bereich der unteren Hälfte Abtriebsrads 4a so befestigt ist, dass der Formschluss durch eine spaltende Keilwirkung der entsprechend ausgebildeten Geometrie des Abstreifelementes 12b unterbrochen wird. Üblicherweise reicht die an dem Lastaufnahmemittel 7 hängende Last aus, um den Zahnriemen 2 sicher von dem Abtriebsrad 4a ablaufen zu lassen. Weiterhin gezeigt ist eine mit dem Abstreifelement 12b verbundene Kassettenwand 12a, deren Funktion in Figur 3 detailliert beschrieben ist. Der freigegebene Zahnriemen 2 wird unterhalb des Abtriebsrads 4a zwischen am unteren Rand des Gehäuses 5 angeordneten Leitrollen 11 in vertikaler Richtung nach unten aus dem Gehäuse 5 hinausgeführt. Am ersten Ende 2a des Zahnriemens 2 ist das Lastaufnahmemittel 7 befestigt. Die Rotationsachsen der Abtriebswelle 4b, der Welle 6b, der Umlenkrolle 9, der Führungsrollen 10 sowie der Leitrollen 11 sind vorzugsweise parallel zueinander ausgerichtet.The release of the toothed belt 2 is assisted by a stripping element 12b, which is fastened in the housing 5 in the region of the lower half driven gear 4a such that the positive connection is interrupted by a splitting wedge effect of the correspondingly formed geometry of the stripping element 12b. Usually, the load suspended on the load receiving means 7 is sufficient to allow the toothed belt 2 to run off the driven gear 4a safely. Also shown is a cassette wall 12a connected to the wiper element 12b, whose function is shown in FIG FIG. 3 is described in detail. The released toothed belt 2 is led out below the output gear 4a between arranged at the bottom of the housing 5 guide rollers 11 in a vertical downward direction out of the housing 5. At the first end 2a of the toothed belt 2, the load-receiving means 7 is attached. The axes of rotation of the output shaft 4b, the shaft 6b, the guide roller 9, the guide rollers 10 and the guide rollers 11 are preferably aligned parallel to each other.

Die Figur 3 zeigt eine Vorderansicht der Figur 2 im Teilschnitt A-B, in der eine Kassette 12 mit Kassettenwänden 12a als eine vorteilhafte Ausführungsform zur drehbaren Lagerung der Rollen 9 (siehe Figur 2), 10 und 11 dargestellt ist. Es ist nur jeweils eine Rolle 10 und 11 im Schnitt gezeigt. Die Kassette 12 ist als eine lösbar auf der Abtriebswelle 4b beziehungsweise dem Abtriebsrad 4a (siehe Figur 2) schwimmend gelagerte Baueinheit ausgeführt und umfasst zusätzlich zu den Rollen 9, 10 und 11 das Abtriebsrad 4a sowie das Abstreifelement 12b (siehe Figur 2). Die Kassettenwände 12a weisen Lageröffnungen auf, mittels derer die Rollen 9, 10 und 11 zwischen zwei Kassettenwänden 12a positioniert und drehbar gelagert werden. Im nicht in den Zahnriemenzug 1 eingebauten Zustand der Kassette 12 sichert das an mindestens einer der Kassettenwände 12a befestigte Abstreifelement 12b das zwischen dem Abstreifelement 12b und den Führungsrollen 10 unbefestigt angeordnete Abtriebsrad 4a gegen ein vertikales Herausfallen aus dem Bereich der in etwa halbkreisförmig angeordneten Führungsrollen 10. Dadurch ist das Abtriebsrad 4a in etwa konzentrisch bezüglich Aufnahmeöffnungen zur Durchführung der Abtriebswelle 4b zwischen den Kassettenwänden 12a vorpositioniert. Die Kassette 12 sitzt innerhalb des Gehäuses 5 auf der mit dem Getriebe 4 zusammenwirkenden Abtriebswelle 4b, die durch die Aufnahmeöffnung zumindest der dem Getriebe 4 zugewandten Kassettenwand 12a geführt ist, wobei die Verbindung zwischen der Abtriebswelle 4b und dem Abtriebsrad 4a vorzugsweise durch Formschluss realisiert ist. Die Kassette 12 ist über das Abtriebsrad 4a axial auf der Abtriebswelle 4b gesichert, beispielsweise durch einen auf dem freien, also dem vom Getriebe 4 abgewandten Ende der Abtriebswelle 4b sitzenden Sicherungsring 4d. Zudem ist die Kassette 12 über mindestens einen seitlich an der Kassette 12 herausragend angeordneten Stift 13, der sich an in dem Gehäuse 5 vorgesehenen Aussparungen abstützt, gegen Verdrehen gesichert. Das Gehäuse 5 wirkt somit als Widerlager insbesondere für die Führungsrollen 10 und wird folglich von dem drehenden Abtriebsrad 4a nicht mitgenommen. Der Zahnriemen 2 wird in der in Figur 2 beschriebenen Art von den Rollen 9, 10 und 11 durch die Kassette 12 geführt, wobei der Zahnriemen 2 entweder bereits im Rahmen der Montage formschlüssig mit dem Abtriebsrad 4a in die Kassette 12 eingelegt und anschließend das zweite Ende 2b mit der Speicherrolle 6a befestigt wird, oder der Zahnriemen 2 zunächst mit dem zweiten Ende 2b an der Speicherrolle 6a befestigt und anschließend das frei schwingende erste Ende 2a in die montierte Kassette 12 eingefädelt und anschließend entsprechend durch die Kassette 12 geführt wird.The FIG. 3 shows a front view of FIG. 2 in partial section AB, in which a cassette 12 with cassette walls 12a as an advantageous embodiment for rotatably supporting the rollers 9 (see FIG. 2 ), FIGS. 10 and 11. Only one roller 10 and 11 is shown in section. The cassette 12 is detachable on the output shaft 4b and the output gear 4a (see FIG FIG. 2 ) floating mounted unit and includes in addition to the rollers 9, 10 and 11, the driven gear 4a and the scraper element 12b (see FIG. 2 ). The cassette walls 12a have bearing openings by means of which the rollers 9, 10 and 11 are positioned and rotatably supported between two cassette walls 12a. In the state of the cassette 12 which is not installed in the toothed belt train 1, the stripping element 12b attached to at least one of the cassette walls 12a secures the driven wheel 4a unsecured between the stripping element 12b and the guide rollers 10 against vertical falling out of the area of the roughly semicircular guide rollers 10. As a result, the output gear 4a is prepositioned approximately concentrically with respect to receiving openings for the passage of the output shaft 4b between the cassette walls 12a. The cassette 12 is seated within the housing 5 on the cooperating with the gear 4 output shaft 4b, which is guided through the receiving opening at least the gear 4 facing cassette wall 12a, wherein the connection between the output shaft 4b and the output gear 4a is preferably realized by positive engagement. The cassette 12 is axially secured via the output gear 4a on the output shaft 4b, for example, by a 4d sitting on the free, ie the end of the output shaft 4b facing away from the transmission 4b. In addition, the cassette 12 is secured against rotation by means of at least one pin 13 which protrudes laterally from the cassette 12 and which is supported on recesses provided in the housing 5. The housing 5 thus acts as an abutment, in particular for the guide rollers 10 and is therefore not taken away from the rotating output gear 4a. The timing belt 2 is in the in FIG. 2 described type of the rollers 9, 10 and 11 out through the cassette 12, wherein the timing belt 2 is inserted either already in the context of assembly form-fitting with the driven gear 4a in the cassette 12 and then the second end 2b is attached to the storage roller 6a, or the toothed belt 2 is first fastened to the storage roller 6a with the second end 2b, and then the free-swinging first end 2a is threaded into the mounted cassette 12 and then passed through the cassette 12 accordingly.

Außer dem in den Figuren 1 bis 3 gezeigten einsträngigen Ausführungsbeispiel, bezieht sich die Erfindung ebenso auf eine mehrsträngige Ausführungsform, insbesondere mit einem als Unterflasche ausgebildeten Lastaufnahmemittel 7 in einfach eingescherter Ausführungsform, wobei das erste Ende 2a des Zahnriemens 2 nicht frei hängend, sondern fest mit dem Gehäuse 5 verbunden ist. Des Weiteren sind für den Riemenspeicher 6 gegenüber der dargestellten Ausführungsform auch alternative Anbringungspositionen denkbar, insbesondere unterhalb des Gehäuses 5, vergleichbar mit dem Kettenspeicher konventioneller Kettenzüge. Es ist außerdem möglich, dass das Aufwickeln des Zahnriemens 2 über einen Wickel-Motor, vorzugsweise mittels eines Stillstandsmotors oder einer Rutschkupplung, anstatt über eine Drehfeder 6c erfolgt. Ebenso ist es möglich, den Riemenspeicher 6 wie einen konventionellen Kettenspeicher zur chaotischen Aufnahme des Zahnriemens 2 zu verwenden, so dass der Zahnriemen 2 nicht aufgewickelt, sondern lediglich vom Abtriebsrad 4a ungeordnet in den Riemenspeicher hineingedrückt wird. Alternativ zur Verwendung der Kassette 12 zur Lagerung der Rollen 9, 10 und 11 kann eine entsprechende Lagerung direkt an dem Gehäuse 5 erfolgen, also in einer nicht als herausnehmbare Baueinheit zusammengefassten Form.Except in the FIGS. 1 to 3 shown single-stranded embodiment, the invention also relates to a multi-stranded embodiment, in particular with a trained as a bottom load receiving means 7 in a simple sworded embodiment, wherein the first end 2a of the toothed belt 2 is not freely suspended, but firmly connected to the housing 5. Furthermore, alternative attachment positions are conceivable for the belt store 6 with respect to the illustrated embodiment, in particular below the housing 5 with the chain memory of conventional chain hoists. It is also possible that the winding of the toothed belt 2 via a winding motor, preferably by means of a standstill motor or a slip clutch, instead of via a torsion spring 6c. Likewise, it is possible to use the belt store 6 as a conventional chain store for chaotically receiving the toothed belt 2, so that the toothed belt 2 is not wound up, but is merely pressed out of the drive wheel 4a in disorder in the belt store. As an alternative to the use of the cassette 12 for supporting the rollers 9, 10 and 11, a corresponding bearing can be made directly on the housing 5, that is to say in a form not combined as a removable structural unit.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
ZahnriemenzugZahnriemenzug
22
Zahnriementoothed belt
2a2a
erstes Endefirst end
2b2 B
zweites Endesecond end
2c2c
Riemenzahnbelt tooth
33
Motorengine
44
Getriebetransmission
4a4a
Abtriebsradoutput gear
4b4b
Abtriebswelleoutput shaft
4c4c
Radzahnsprocket
4d4d
Sicherungsringcirclip
55
Gehäusecasing
66
Riemenspeicherbelt store
6a6a
Speicherrollestorage roll
6b6b
Wellewave
6c6c
Drehfedertorsion spring
6d6d
Speichergehäusestorage Enclosures
77
LastaufnahmemittelLoad handling devices
88th
Aufhängeelementsuspension
99
Umlenkrolleidler pulley
1010
Führungsrolleleadership
1111
Leitrollesheave
1212
Kassettecassette
12a12a
Kassettenwandcassette wall
12b12b
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Claims (14)

  1. Toothed-belt lifting device (1) for raising and lowering loads, having a toothed belt (2) which is driven by an output drive pulley (4a) and which is positively interengaged with the output drive pulley (4a) in a region of looped contact, characterised in that, in the region of looped contact, there are arranged one behind the other, looking in the circumferential direction of the output drive pulley (4a), at least three, and preferably five to seven, guide rollers (10) which press the toothed belt (2) against the output drive pulley (4a) in the region of looped contact and thus maintain the positive interengagement between the toothed belt (2) and the output drive pulley (4a).
  2. Toothed-belt lifting device (1) according to claim 1, characterised in that, looking in the circumferential direction of the output drive pulley (4a), two adjacent guide rollers (10) are spaced apart by not more than 30° of the region of looped contact.
  3. Toothed-belt lifting device (1) according to claim 1 or 2, characterised in that the region of looped contact is at least 90°, and preferably 120° to 180°, and as a particular preference 120° to 150°.
  4. Toothed-belt lifting device (1) according to one of claims 1 to 3, characterised in that, as well as having guide rollers (10), the toothed belt (2) can be guided onto or off the output drive pulley (4a) by means of additional direction-changing or directing rollers (9, 11).
  5. Toothed-belt lifting device (1) according to one of claims 1 to 4, characterised in that a load pick-up means (7) is suspended from the toothed belt (2).
  6. Toothed-belt lifting device (1) according to claim 5, characterised in that the load pick-up means (7) is freely suspended.
  7. Toothed-belt lifting device (1) according to claim 5 or 6, characterised in that the load pick-up means (7) is suspended from a first end (2a) of the toothed belt (2).
  8. Toothed-belt lifting device (1) according to claim 5 or 6, characterised in that, in single-reeved form, the load pick-up means (7) takes the form of a bottom block.
  9. Toothed-belt lifting device (1) according to one of the preceding claims, characterised in that output drive pulley (4a) is seated on an output drive shaft (4b) to be solid in rotation therewith, and for driving purposes the output drive shaft (4b) is connected to a motor (3), and in particular an electric motor, via a gearbox (4).
  10. Toothed-belt lifting device (1) according to one of the preceding claims, characterised in that a belt storage means (6) which supplies the toothed belt (2) is fastened to the toothed-belt lifting device (1).
  11. Toothed-belt lifting device (1) according to claim 10, characterised in that there is arranged in the belt storage means (6) a storage reel (6a), which storage reel (6a) is rotatably mounted on a shaft (6b), to which storage reel (6a) the toothed belt (2) is connected at its second end (2b), and on which storage reel (6a) the toothed belt (2) can be wound up.
  12. Toothed-belt lifting device (1) according to claim 11, characterised in that the storage reel (6a) is connected to the shaft (6b) via a torsion spring (6c) in such a way that, starting with a wound-up toothed belt (2), unwinding of the toothed belt (2) tightens the torsion spring (6c) and the toothed belt (2) can be wound up on the storage reel (6a) by the force which results from the energy stored in the tightened torsion spring (6c).
  13. Toothed-belt lifting device (1) according to claim 11, characterised in that the storage reel (6a) is connected for driving purposes to a winding motor, and in particular to an electric motor.
  14. Toothed-belt lifting device (1) according to one of claims 10 to 13, characterised in that, starting from the belt storage means (6), at least one direction-changing roller (9) guides the toothed belt (2) to the output drive pulley (4a) and at least two directing rollers (11) guide the toothed belt (2) away from the output drive pulley (4a), the direction-changing roller (9) and the directing rollers (11) being fastened to a housing (5) of the toothed-belt lifting device (1).
EP11764741.2A 2010-10-06 2011-10-04 Lifting device with a toothed belt Active EP2625131B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010047704A DE102010047704A1 (en) 2010-10-06 2010-10-06 Hoist with a toothed belt as a suspension element
PCT/EP2011/067335 WO2012045749A1 (en) 2010-10-06 2011-10-04 Lifting device with a toothed belt as supporting means

Publications (2)

Publication Number Publication Date
EP2625131A1 EP2625131A1 (en) 2013-08-14
EP2625131B1 true EP2625131B1 (en) 2014-07-02

Family

ID=44759691

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11764741.2A Active EP2625131B1 (en) 2010-10-06 2011-10-04 Lifting device with a toothed belt

Country Status (6)

Country Link
US (1) US20130181177A1 (en)
EP (1) EP2625131B1 (en)
CN (1) CN103140431B (en)
DE (1) DE102010047704A1 (en)
ES (1) ES2498292T3 (en)
WO (1) WO2012045749A1 (en)

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US10815102B2 (en) * 2017-10-05 2020-10-27 Mark C. Dodd Moisture proof sleeve block
CL2018001756S1 (en) * 2017-12-29 2018-10-19 J D Neuhaus Holding Gmbh & Co Kg Load hoist
CN109132878B (en) * 2018-10-24 2020-07-14 嘉兴市禾兴自润轴承开发有限公司 Bridge construction machinery quick hoisting device
CN109244949B (en) * 2018-10-29 2024-04-09 国网新疆电力有限公司昌吉供电公司 Wire lifting tool for distribution live working
CH715818A1 (en) 2019-02-06 2020-08-14 Cep Technique Sa Scenic winch with toothed belts and adapted toothed belt.
US11312598B2 (en) 2019-03-18 2022-04-26 Wenger Corporation Hoist fleet assembly
CA3156800A1 (en) * 2019-10-01 2021-04-08 Allied Motion Technologies Inc. Spring-assisted rotary actuator
US11987480B2 (en) * 2019-10-23 2024-05-21 Kanister Industries Llc Cable guide device
USD982871S1 (en) * 2020-03-20 2023-04-04 Konecranes Global Corporation Hoist
US11702326B2 (en) * 2021-02-03 2023-07-18 Eduardo Nunez Duran Hoisting assembly
KR102538478B1 (en) * 2021-06-07 2023-05-31 한국항공우주연구원 Drone and drone anti-torque compensation method
KR102490638B1 (en) * 2021-10-21 2023-01-19 맹수영 A wireless power-operated safety chain block
KR102490637B1 (en) * 2021-11-04 2023-01-19 맹수영 A wireless power-operated smart safety chain block

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Also Published As

Publication number Publication date
WO2012045749A1 (en) 2012-04-12
CN103140431A (en) 2013-06-05
CN103140431B (en) 2015-12-16
ES2498292T3 (en) 2014-09-24
EP2625131A1 (en) 2013-08-14
DE102010047704A1 (en) 2012-04-12
US20130181177A1 (en) 2013-07-18

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