EP3020674A1 - Service lift - Google Patents
Service lift Download PDFInfo
- Publication number
- EP3020674A1 EP3020674A1 EP14193464.6A EP14193464A EP3020674A1 EP 3020674 A1 EP3020674 A1 EP 3020674A1 EP 14193464 A EP14193464 A EP 14193464A EP 3020674 A1 EP3020674 A1 EP 3020674A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drive
- service lift
- chain
- chains
- receiving means
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
- B66B9/02—Kinds or types of lifts in, or associated with, buildings or other structures actuated mechanically otherwise than by rope or cable
- B66B9/027—Kinds or types of lifts in, or associated with, buildings or other structures actuated mechanically otherwise than by rope or cable by rope climbing devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
- B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
- B66B9/16—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure
- B66B9/187—Mobile or transportable lifts specially adapted to be shifted from one part of a building or other structure to another part or to another building or structure with a liftway specially adapted for temporary connection to a building or other structure
Definitions
- the present invention relates to a service lift, in particular for installation in or on structures, with a person receiving means, a drive means for upward and downward movement of the person receiving means, and a suspension which is fixedly connected to the building, and along which the service lift from the drive means is movable.
- Service lifts of the type described above are used for lifting and lowering loads and persons.
- service lifts of the aforementioned type are used when the corresponding structures already exist, and the lifts are retrofitted in these, or temporarily installed there, for example, during installation work.
- a typical application example are the towers of wind turbines.
- Such lifts and conventional drive mechanisms are for example DE 10 2010 062 774 A1 known.
- a suspension steel cables are used in the prior art, which are fixed to the building side at a fixed point.
- the person receiving means are moved either by means of drum winches up and down, which wind up the steel cables, but moved by means of so-called rope pulleys up and down, the rope pulleys by means of a traction sheave received a non-positive connection with the steel cable, the rope but not wound, but in the Principle on the free-hanging rope procedure.
- the present invention was therefore based on the object to provide a service lift, which is improved in terms of its drive concept in the aforementioned points.
- the invention solves the underlying object in a service lift of the type described by the suspension has a first, and preferably a second, drive chain, which is attachable to an attachment point of the structures, and in which the drive means for each of the drive chains or a plurality of gears, which are force-transmittingly engaged with the drive chain to implement a rotation of the gears in the upward or downward movement of the service lift.
- the invention is based on a complete departure from the known concept of rope winch, which requires at least one carrying rope and a safety rope, by resorting instead to the use of one or two drive chains.
- the chain-based drive concept offers several advantages: Due to the construction of chains, which are designed to mesh with gears, the rigidity of the suspension is significantly improved compared to known solutions. It is less pronounced to vibrations in the vertical direction. A drive chain also has the advantage of producing significantly less noise during operation due to engagement of the gears with the drive chain than would a rope winch with its traction sheave engaging a steel cable.
- the drive device has a motor drive with a first drive motor and a second drive motor which are in each case in engagement with one of the two drive chains.
- the motor drive consists of the first and second drive motor.
- both drive systems in parallel improves the reliability of the service lift.
- the second drive can always be switched on if necessary, for example, if the first motor drive is defective.
- both systems run simultaneously during operation. Should one system fail, the second is at least able to hold the load safely.
- both systems are designed so that they are able to lift the load.
- the drive motors are each designed as geared motors with an electric motor and an electromagnetic brake.
- the electromagnetic brake ensures reliable locking of the motor for reliable locking of the service lift in its position.
- catching devices as used in the known from the prior art rope winches used dispensable.
- the electromagnetic brakes provided in both propulsion motors provide reliable backup of the service lift.
- the drive motors each have a centrifugal brake and means for manual unlocking of the electromagnetic brake.
- the electromagnetic brakes of the drive motor (s) it can happen in extreme situations that both drive motors are defective and operation can not be continued after stopping the service lift. In such a case, it is possible in this embodiment to release the electromagnetic brakes of the drive motor (s), whereupon the service lift will begin to descend.
- the rate of descent is limited to a permissible upper limit, so that safety and injury risks can be ruled out.
- the maximum rate of descent is in a range of 22 m / min to 28 m / min, more preferably 25 m / min).
- the centrifugal brake also works when no electrical power supply is guaranteed, which makes the system absolutely fail-safe.
- the drive device is designed as a chain conveyor drive, wherein the length of the drive chains is dimensioned such that they extend in the assembled state from the suspension through the drive means and the person receiving means laterally along where they hang down.
- the advantage of drive chains is that they can be kept with little manufacturing effort in principle any length.
- the same components of the service lift including its drive means can always be used for a variety of locations and only the length of the drive chains used in each case must be adapted and selected at the place of use. This increases the amount of common parts for a variety of job sites, and increases economies of scale due to economies of scale.
- the mechanical structure of the drive device is simplified, because no means for catching / winding the drive chains must be provided.
- the drive chains are aligned in parallel, preferably guided past on the same side of the service lift on the person receiving means, and are held by a clamping weight in the vertical direction to train.
- the tensioning weight is designed as a common tensioning weight for both drive chains.
- the tension weight comprises two individual weights.
- the drive chains are preferably deflected several times by the drive device.
- the deflection serves, in particular, to align the drive chains essentially perpendicular to the center of gravity of the person receiving means above the person receiving means so that the person receiving means "just hangs" and can be better guided within, for example, building shafts.
- it is ensured by a, preferably multiple, deflection of the drive chain that the wrap angle of the chain around the power transmitting gear, which is connected to the motor drive, is large enough to always keep enough teeth with the chain in engagement. As a result, the punctual load is reduced to individual teeth, and minimized the wear of the drive system as a whole.
- the deflection serves to redirect the drive chain along the drive device along and past the person receiving means.
- the additional deflecting, non-driven gears in addition to the tension weight contribute to the fact that the chain does not jump and the traction with the driving gear is always maintained.
- the service lift according to the invention has a lifting force limiting device, which is set up to stop the upward or downward movement of the service lift as a function of a relative movement between the drive device and the person receiving means when a predetermined chain load is exceeded.
- a lifting force limiting device which is set up to stop the upward or downward movement of the service lift as a function of a relative movement between the drive device and the person receiving means when a predetermined chain load is exceeded.
- the drive motors are mounted on a common load-receiving plate, wherein the load-receiving plate is pivotally mounted on the person receiving means and biased by a spring element in the direction of the person receiving means.
- the pivoting movement is inhibited by means of a damper element.
- the pivot axis, by which the axis is understood, about which the load-receiving plate pivots relative to the person receiving means is preferably offset horizontally to a suspension-side force application point of the suspension.
- the spring element Due to the fact that the spring element is biased in the direction of the person receiving means, the spring counteracts a deflection as a result of a normal increase in the force of the suspension-side chain line. On the strength of the bias is thus adjustable, from which Switzerlandkrafterhöhung ever starts a pivoting movement.
- an interruption switch for the drive device is arranged on the person receiving means or the load-receiving plate such that it is triggered when a predetermined deflection of the load-receiving plate against the direction of action of the prestressed spring element occurs.
- the drive motor is preferably stopped immediately.
- the damper element which is preferably provided on the service lift, acts between the load-receiving plate and the person-receiving means in order to prevent the breaker switch from being triggered when the start of the journey is jerky.
- the latter has a device for monitoring the tension of the drive chains.
- a device for monitoring the tension of the drive chains In the course of the life of each chain there is an elongation of the chain. In extremely rare cases, it may also happen that individual chain links fail and Cracking, which can cause the chain to break if the crack is not detected in time.
- the device for tension monitoring for each drive means preferably non-driven gear, which is non-parallel deflectable relative to the respective drive chain and by means of a spring element in the direction of the respective drive chain against this is pressed.
- an interruption switch for the drive device is arranged on the toothed wheel, one of the spring element mitbewegten gear holder, or the load-receiving plate is that it is triggered upon occurrence or exceeding a predetermined deflection of the gear.
- the pressed by means of the spring element in the direction of the drive chain against the drive chain gear acts to displace the drive chain from its predetermined due to the chain tension orientation. The chain tension works against this.
- the interruption switch operates preferably according to the same principle of operation as the interruption switch for the drive device, which is provided in the Hubkraftbegrenzungs announced. Upon reaching or exceeding a predetermined deflection of the gear or the gear bearing gear holder, the power supply to the motor drive is interrupted. Both motors are switched off.
- the two drive motors and the gears which are in engagement with the drive chains are designed identically for both drive chains, and if, furthermore, both drive chains are designed identically. This provides a fully redundant drive system which, in the event of a failure of the first driveline, ensures that when the first driveline fails, the other driveline holds the load.
- the service lift 1 has a person receiving means 3.
- the person receiving means 3 is formed as a cabin.
- alternative embodiments can also provide, for example, that the person receiving means is designed as a basket or platform.
- the person receiving means 3 is mounted on a suspension 5, which is fastened on the building side.
- the suspension 5 comprises a first drive chain 7a and a second drive chain 7b.
- a transmission device 11 is engaged with the drive chains 7a, b.
- the transmission device 11 comprises a motor drive 9.
- the motor drive 9 in turn comprises a first electric motor 9a and a second electric motor 9b.
- a tension weight 10 holds the drive chains 7a, b parallel to each other and to tension.
- FIGS. 2a, b Further details of the drive device 11 are in the FIGS. 2a, b seen.
- the electric motor 9a, b is in each case coupled to a transmission 13a, b.
- the gear 13a, b On the output side, the gear 13a, b in each case by means of a gear ( FIGS. 4 . 5 ) in a form-fitting engagement with in each case a drive chain 7a, b.
- the electric motors 9a, b together with their associated gear 13a, b form a geared motor.
- the drive device 11 is mounted on the roof of the passenger receiving means 3.
- the drive device 11 is arranged on a permanently connected to the person receiving means 3 mounting plate 15 by being mounted on a load-bearing plate 17, which in turn is pivotally coupled to the person receiving means 3 about the axis 19.
- the electric motors 9a, b each have a hand wheel 21.
- the handwheel is used to manually set the chain preload when mounting the system. This allows a single gear motor to be moved manually until both chains are preloaded. It also allows an optional suspension side provided, the chains are connected to the building connecting rocker in Libra.
- the electric motors 9a, b are each equipped with a hand lever 23.
- the hand levers 23 provide a means for manual unlocking of an electromagnetic brake provided in the gearmotors. In an emergency, e.g. in case of power failure, both brakes must be opened. Then the person receiving means moves down by the weight alone, and the persons can be evacuated.
- the drive device 11 further comprises a spring element 25 which is formed in the present embodiment as a compression spring and arranged above the load-receiving plate 17.
- the spring element 25 is adjustable by means of an adjusting screw 27 with respect to its biasing force.
- the spring element 25 presses the portion of the load-receiving plate 17, against which it rests, in the load direction of the drive chains 7a, b on the person receiving means 3.
- the load-receiving plate 17 contacts an interruption switch 29 which is arranged between the load-receiving plate 17 and the mounting plate 15 or the person-receiving means 3.
- FIG. 4 it also follows that the pivot axis 19 of the load-bearing plate 17 is offset relative to a force application point 33 of the suspension to the drive means 11 in the horizontal direction by the amount .DELTA.L.
- a torque is generated which the drive device 11, according to the orientation in FIG FIG. 4 would pivot counterclockwise.
- the spring element 25 acts.
- the load-bearing plate 17 is pivoted against the action of the spring element 25, and thus moved away from the interruption switch 29.
- the power supply to the electric motors 9a, b is interrupted, and the operation of the service lift stops. This is done to protect the drive chains 7a, b and thus the passengers in the person receiving means. 3
- the load-bearing plate 17 is also connected by means of a damper element 41 with the mounting plate 15 of the person receiving means 3. This prevents when starting and braking at actual normal conditions of the service lift triggers the Hubkraftbegrenzungs announced.
- FIG. 4 Furthermore, the arrangement of a plurality of gears of the drive device 11 can be seen.
- the drive device 11 is connected to the transmission of the motor drive 9 (FIG. FIG. 1 ) coupled drive gear 33, which from the drive chain 7b ( FIG. 4 ) (or the drive chain 7a in the other case) is wrapped.
- the gear 33 is fixed to the transmission shaft 35.
- Another, non-driven gear 37 is provided, which deflects the drive chain 7b.
- a third, also not driven, gear 39 redirects the drive chain 7b again, so that it can hang down substantially vertically on the side of the person receiving means 3 down.
- FIG. 4 illustrated aspect relates to a device for voltage monitoring of the drive chain.
- This device has a gear holder 45, which comprises a laterally projecting projection 45 '.
- the projection 45 'of the holder 45 contacts in the state shown in FIG FIG. 4 a break switch 53 which is disposed between the load receiving plate 17 and the holder 45.
- a spring element 49 ensures that a gear 47 mounted on the holder 45 is pressed in the direction of the arrow 51 against the drive chain 7b.
- the holder Upon reaching or exceeding a predetermined deflection in the direction of arrow 51, the holder is pivoted so far that the breaker switch 53 triggers and the power supply to the motor drive 9 (FIG. FIG. 1 ) interrupts.
- FIG. 5 gives the view free on the other side of one of the two supports 31, which store the gears 33, 35 and the holder 45.
- the arrangement of the gear 47 for voltage monitoring, the gear 47 bearing bracket 45 with its projection 45 'and the holder 45 deflecting spring 49 are in deviation to FIG. 4 made here from the front.
- the holder 45 is received in the tip 31 by means of a bearing 50.
Abstract
Die Erfindung betrifft einen Servicolift (1), insbesondere zur Installation in oder an Bauwerken, mit einem Personenaufnahmemittel (3), einer Antriebseinrichtung (11) zum Aufwärts- und Abwärtsbewegen des Personenaufnahmemittels (3), und einer Aufhängung (5), die fest mit dem Gebäude verbindbar ist, und an welcher entlang der Servicellft (1) von der Antriebseinrichtung bewegbar ist. Die Aufhängung (5) weist eine erste und eine zweite Antriebskette (7a,b) auf, welche an einem Befestigungspunkt der Bauwerke anbringbar ist, und die Antriebseinrichtung weist für jede der Antriebsketten (7a,b) ein oder mehrere Zahnräder (33) auf, die mit der jeweiligen Antriebskette (7a,b) kraftübertragend in Eingriff stehen, um eine Rotation der Zahnräder in die Aufwärts- oder Abwärtsbewegung des Servicelifts (1) umzusetzen.The invention relates to a Servicolift (1), in particular for installation in or on structures, with a person receiving means (3), a drive means (11) for upward and downward movement of the person receiving means (3), and a suspension (5) fixed with the building is connectable, and on which along the Servicftft (1) is movable by the drive means. The suspension (5) has a first and a second drive chain (7a, b) which can be attached to an attachment point of the structures, and the drive device has one or more gears (33) for each of the drive chains (7a, b). which are force-transmittingly engaged with the respective drive chain (7a, b) to implement rotation of the gears in the upward or downward movement of the service lift (1).
Description
Die vorliegende Erfindung betrifft einen Servicelift, insbesondere zur Installation in oder an Bauwerken, mit einem Personenaufnahmemittel, einer Antriebseinrichtung zum Aufwärts- und Abwärtsbewegen des Personenaufnahmemittels, und einer Aufhängung, die fest mit dem Gebäude verbindbar ist, und an welcher entlang der Servicelift von der Antriebseinrichtung bewegbar ist.The present invention relates to a service lift, in particular for installation in or on structures, with a person receiving means, a drive means for upward and downward movement of the person receiving means, and a suspension which is fixedly connected to the building, and along which the service lift from the drive means is movable.
Servicelifte der vorbezeichneten Art werden zum Anheben und Absenken von Lasten und Personen benutzt. Insbesondere kommen Servicelifte der vorbezeichneten Art zum Einsatz, wenn die entsprechenden Bauwerke bereits existieren, und die Lifte in diesen nachgerüstet werden, oder dort temporär beispielsweise während Installationsarbeiten installiert werden müssen. Ein typisches Anwendungsbeispiel sind die Türme von Windenergieanlagen.Service lifts of the type described above are used for lifting and lowering loads and persons. In particular, service lifts of the aforementioned type are used when the corresponding structures already exist, and the lifts are retrofitted in these, or temporarily installed there, for example, during installation work. A typical application example are the towers of wind turbines.
Solche Liftanlagen und dafür gängige Antriebsmechanismen sind beispielsweise aus
Wenngleich das Bewegen von Serviceliften mit Seildurchlaufwinden der bekannten Art im Allgemeinen zufriedenstellend funktioniert, so besteht doch weiterhin ein Verbesserungsbedarf bei den bekannten Systemen. So besteht beispielsweise durch das Einwirken der Treibscheibe bei bekannten Seildurchlaufwinden nach größenordnungsmäßig 1.500 Lastzyklen der Bedarf, die Tragseile aufgrund Verschleißes auszuwechseln. Ferner weisen auch steife Stahlseile aufgrund ihres strukturellen Aufbaus ein gewisses längenelastisches Verhalten auf, was zu Schwingungen in vertikaler Richtung im Betrieb der Servicelifte führen kann. Die auf Kraftschluss basierende Antriebsart ruft ferner einen gewissen Geräuschpegel hervor.While moving service lifts with rope-type winches of the known type generally works satisfactorily, there is still a need for improvement in the known systems. Thus, for example, by the action of the traction sheave in known rope traversing winches of the order of magnitude of 1,500 load cycles, the need to replace the supporting cables due to wear. Furthermore, stiff steel cables also have a certain length-elastic behavior due to their structural design, which can lead to oscillations in the vertical direction during operation of the service lifts. The traction-based drive also causes a certain noise level.
Der vorliegenden Erfindung lag somit die Aufgabe zugrunde, einen Servicelift anzugeben, der hinsichtlich seines Antriebskonzeptes in den vorgenannten Punkten verbessert ist.The present invention was therefore based on the object to provide a service lift, which is improved in terms of its drive concept in the aforementioned points.
Die Erfindung löst die ihr zugrunde liegende Aufgabe bei einem Servicelift der eingangs bezeichneten Art, indem die Aufhängung eine erste, und vorzugsweise eine zweite, Antriebskette aufweist, welche an einem Befestigungspunkt der Bauwerke anbringbar ist, und in dem die Antriebseinrichtung für jede der Antriebsketten ein oder mehrere Zahnräder aufweist, die mit der Antriebskette kraftübertragend in Eingriff stehen, um eine Rotation der Zahnräder in die Aufwärts- oder Abwärtsbewegung des Servicelifts umzusetzen.The invention solves the underlying object in a service lift of the type described by the suspension has a first, and preferably a second, drive chain, which is attachable to an attachment point of the structures, and in which the drive means for each of the drive chains or a plurality of gears, which are force-transmittingly engaged with the drive chain to implement a rotation of the gears in the upward or downward movement of the service lift.
Die Erfindung beruht auf einer vollständigen Abkehr vom bekannten Konzept der Seildurchlaufwinde, die mindestens ein Tragseil und ein Fangseil benötigt, indem stattdessen auf den Einsatz einer bzw. zweier Antriebsketten zurückgegriffen wird. Das kettenbasierte Antriebskonzept bietet gleich mehrere Vorteile: Aufgrund der Bauweise von Ketten, die zum Eingriff durch Zahnräder ausgelegt sind, ist die Steifigkeit der Aufhängung im Vergleich zu bekannten Lösungen deutlich verbessert. Es kommt weniger ausgeprägt zu Schwingungen in vertikaler Richtung. Eine Antriebskette hat ferner den Vorteil, dass sie im Betrieb deutlich weniger Geräusche hervorruft, die durch den Eingriff der Zahnräder in die Antriebskette entstehen, als es eine Seildurchlaufwinde mit ihrer Treibscheibe in Eingriff mit einem Stahlseil tun würde.The invention is based on a complete departure from the known concept of rope winch, which requires at least one carrying rope and a safety rope, by resorting instead to the use of one or two drive chains. The chain-based drive concept offers several advantages: Due to the construction of chains, which are designed to mesh with gears, the rigidity of the suspension is significantly improved compared to known solutions. It is less pronounced to vibrations in the vertical direction. A drive chain also has the advantage of producing significantly less noise during operation due to engagement of the gears with the drive chain than would a rope winch with its traction sheave engaging a steel cable.
Noch ein weiterer Vorteil ist darin zu sehen, dass sowohl die Antriebskette als auch die in die Antriebskette zur Kraftübertragung eingreifenden Zahnräder mit technisch einfachen Mitteln auf bewährte Weise hergestellt werden können, und als Standartbauteile deutlich leichter verfügbar sind, als beispielsweise Treibscheiben von Seildurchlaufwinden und entsprechend konfektionierte Stahlseile, für welche eine deutlich eingeschränktere Auswahl an Herstellern zur Verfügung stehen.Yet another advantage is the fact that both the drive chain and the engaging in the drive chain for power transmission gears can be produced in a tried and tested manner with technically simple means, and as standard components are much easier available than for example traction sheaves of rope traction winches and correspondingly assembled steel cables, for which a much more limited selection of manufacturers are available.
Beim Antrieb des Servicelifts mittels Zahnrädern an der Antriebskette ist aufgrund des formschlüssigen Antriebskonzeptes zudem ein geringerer Verschleiß zu erwarten. Die Wartungsintervalle bei einer erfindungsgemäßen Liftanlage sind um ein Vielfaches länger als bei den bekannten Systemen.When driving the service lift by means of gears on the drive chain, a lesser wear is to be expected due to the positive drive concept. The maintenance intervals in a lift system according to the invention are many times longer than in the known systems.
Die Erfindung wird vorteilhaft weitergebildet, indem die Antriebseinrichtung einen Motorantrieb mit einem ersten Antriebsmotor und einem zweiten Antriebsmotor aufweist, die jeweils mit einer der beiden Antriebsketten in Eingriff stehen. Besonders bevorzugt besteht der Motorantrieb aus dem ersten und zweiten Antriebsmotor.The invention is advantageously further developed in that the drive device has a motor drive with a first drive motor and a second drive motor which are in each case in engagement with one of the two drive chains. Particularly preferably, the motor drive consists of the first and second drive motor.
Durch das Vorhalten von zwei Antriebssystemen parallel wird die Ausfallsicherheit des Servicelifts verbessert. Dadurch, dass auf diese Weise permanent zwei Antriebssysteme mit zwei Antriebsketten vorgehalten werden, kann im Bedarfsfall immer der zweite Antrieb zugeschaltet werden, wenn beispielsweise der erste Motorantrieb defekt ist. Vorzugsweise laufen beide Systeme im Betrieb gleichzeitig. Sollte ein System versagen, ist das zweite mindestens in der Lage, die Last sicher zu halten. In einer bevorzugten Weiterbildung sind beide Systeme so ausgelegt, dass sie in der Lage sind, die Last zu heben.The provision of two drive systems in parallel improves the reliability of the service lift. The fact that in this way permanently two drive systems are provided with two drive chains, the second drive can always be switched on if necessary, for example, if the first motor drive is defective. Preferably, both systems run simultaneously during operation. Should one system fail, the second is at least able to hold the load safely. In a preferred embodiment, both systems are designed so that they are able to lift the load.
In einer besonders bevorzugten Ausführungsform sind die Antriebsmotoren jeweils als Getriebemotoren mit einem Elektromotor und einer elektromagnetischen Bremse ausgebildet. Die elektromagnetische Bremse sorgt für ein zuverlässiges Arretieren des Motors für ein zuverlässiges Arretieren des Servicelifts an seiner Position. Hierbei werden beispielsweise Fangvorrichtungen, wie sie bei den aus dem Stand der Technik bekannten Seildurchlaufwinden zur Anwendung kommen, entbehrlich. Selbst für den unwahrscheinlichen Fall, dass also einmal beide Antriebsmotoren ausfallen sollten, sorgen die elektromagnetischen Bremsen, die in beiden Antriebsmotoren vorgesehen sind, für eine zuverlässige Absicherung des Servicelifts.In a particularly preferred embodiment, the drive motors are each designed as geared motors with an electric motor and an electromagnetic brake. The electromagnetic brake ensures reliable locking of the motor for reliable locking of the service lift in its position. In this case, for example, catching devices, as used in the known from the prior art rope winches used dispensable. Even in the unlikely event that once both drive motors fail, the electromagnetic brakes provided in both propulsion motors provide reliable backup of the service lift.
In einer weiteren bevorzugten Ausführungsform weisen die Antriebsmotoren jeweils eine Fliehkraftbremse und Mittel zur manuellen Entriegelung der elektromagnetischen Bremse auf. Es kann theoretisch in Extremsituationen der Fall eintreten, dass beide Antriebsmotoren defekt sind und ein Betrieb nach dem Stoppen des Servicelifts nicht fortgesetzt werden kann. In einem solchen Fall ist es in dieser Ausführungsform möglich, die elektromagnetischen Bremsen des oder der Antriebsmotoren zu lösen, woraufhin der Servicelift eine Abwärtsbewegung beginnen wird. Mittels der Fliehkraftbremsen wird die Sinkgeschwindigkeit aber auf eine zulässige Höchstgrenze beschränkt, so dass Sicherheits- und Verletzungsrisiken ausgeschlossen werden können. Vorzugsweise liegt die maximale Sinkgeschwindigkeit in einem Bereich von 22 m/min bis 28 m/min besonders bevorzugt 25 m/min).In a further preferred embodiment, the drive motors each have a centrifugal brake and means for manual unlocking of the electromagnetic brake. In theory, it can happen in extreme situations that both drive motors are defective and operation can not be continued after stopping the service lift. In such a case, it is possible in this embodiment to release the electromagnetic brakes of the drive motor (s), whereupon the service lift will begin to descend. By means of centrifugal brakes, however, the rate of descent is limited to a permissible upper limit, so that safety and injury risks can be ruled out. Preferably, the maximum rate of descent is in a range of 22 m / min to 28 m / min, more preferably 25 m / min).
Die Fliehkraftbremse arbeitet auch, wenn keine elektrische Energieversorgung mehr gewährleistet ist, was das System absolut ausfallsicher macht.The centrifugal brake also works when no electrical power supply is guaranteed, which makes the system absolutely fail-safe.
In einer besonders bevorzugten Weiterbildung der Erfindung ist die Antriebseinrichtung als Kettendurchlaufantrieb ausgebildet, wobei die Länge der Antriebsketten derart dimensioniert ist, dass sie sich in montiertem Zustand von der Aufhängung aus durch die Antriebseinrichtung hindurch und am Personenaufnahmemittel seitlich entlang erstrecken, wo sie herunterhängen. Der Vorteil von Antriebsketten ist der, dass sie mit geringem fertigungstechnischem Aufwand in im Prinzip beliebiger Länge vorgehalten werden können. So können für verschiedenste Einsatzorte immer die gleichen Komponenten des Servicelifts inklusive seiner Antriebseinrichtung verwendet werden, und es muss lediglich die Länge der jeweils eingesetzten Antriebsketten an den Einsatzort angepasst und ausgewählt werden. Hierdurch wird die Menge an Gleichteilen für die unterschiedlichsten Einsatzorte erhöht, und aufgrund von Skaleneffekten zeigt sich eine Steigerung der Kosteneffizienz.In a particularly preferred embodiment of the invention, the drive device is designed as a chain conveyor drive, wherein the length of the drive chains is dimensioned such that they extend in the assembled state from the suspension through the drive means and the person receiving means laterally along where they hang down. The advantage of drive chains is that they can be kept with little manufacturing effort in principle any length. Thus, the same components of the service lift including its drive means can always be used for a variety of locations and only the length of the drive chains used in each case must be adapted and selected at the place of use. This increases the amount of common parts for a variety of job sites, and increases economies of scale due to economies of scale.
Zudem ist der mechanische Aufbau der Antriebseinrichtung vereinfacht, weil keine Mittel zum Auffangen/Aufwickeln der Antriebsketten bereitgestellt werden müssen.In addition, the mechanical structure of the drive device is simplified, because no means for catching / winding the drive chains must be provided.
In einer weiteren bevorzugten Ausführung des erfindungsgemäßen Servicelifts sind die Antriebsketten parallel ausgerichtet, vorzugsweise auf der gleichen Seite des Servicelifts an dem Personenaufnahmemittel vorbeigeführt, und werden mittels eines Spanngewichts in vertikaler Richtung auf Zug gehalten. In einer ersten bevorzugten Alternative ist das Spanngewicht als gemeinsames Spanngewicht für beide Antriebsketten ausgebildet. Gemäß einer zweiten Alternative umfasst das Spanngewicht zwei einzelne Gewichte. Durch das Vorsehen eines Spanngewichts wird verhindert, dass die Antriebskette in der Antriebseinrichtung relativ zu den Zahnrädern, insbesondere den antreibenden Zahnrädern springen kann, wobei das Spanngewicht die Lage und Orientierung der Antriebsketten stabilisiert. Wird für beide Antriebsketten ein gemeinsames, beide Antriebsketten haltendes Spanngewicht eingesetzt, wird hierdurch gleichzeitig auch die parallele Ausrichtung beider Antriebsketten permanent gewährleistet.In a further preferred embodiment of the service lift according to the invention, the drive chains are aligned in parallel, preferably guided past on the same side of the service lift on the person receiving means, and are held by a clamping weight in the vertical direction to train. In a first preferred alternative, the tensioning weight is designed as a common tensioning weight for both drive chains. According to a second alternative, the tension weight comprises two individual weights. By providing a clamping weight prevents the drive chain can jump in the drive device relative to the gears, in particular the driving gears, the tension weight stabilizes the position and orientation of the drive chains. Will be a common, both for both drive chains Used drive chain holding tension weight, thereby simultaneously the parallel alignment of both drive chains permanently guaranteed.
Die Antriebsketten werden von der Antriebseinrichtung vorzugsweise mehrfach umgelenkt. Die Umlenkung dient zum einen insbesondere dazu, die Antriebsketten im Wesentlichen lotrecht mit dem Schwerpunkt des Personenaufnahmemittels oberhalb des Personenaufnahmemittels auszurichten, damit das Personenaufnahmemittel "gerade hängt" und innerhalb beispielsweise von Bauwerksschächten besser geführt werden kann. Ferner wird durch eine, vorzugsweise mehrfache, Umlenkung der Antriebskette gewährleistet, dass der Umschlingungswinkel der Kette um das Kraft übertragende Zahnrad, welches mit dem Motorantrieb verbunden ist, groß genug ist, um immer ausreichend viele Zähne mit der Kette in Eingriff zu halten. Hierdurch wird die punktuelle Belastung auf einzelne Zähne reduziert, und der Verschleiß des Antriebssystems insgesamt minimiert.The drive chains are preferably deflected several times by the drive device. The deflection serves, in particular, to align the drive chains essentially perpendicular to the center of gravity of the person receiving means above the person receiving means so that the person receiving means "just hangs" and can be better guided within, for example, building shafts. Furthermore, it is ensured by a, preferably multiple, deflection of the drive chain that the wrap angle of the chain around the power transmitting gear, which is connected to the motor drive, is large enough to always keep enough teeth with the chain in engagement. As a result, the punctual load is reduced to individual teeth, and minimized the wear of the drive system as a whole.
Schließlich dient die Umlenkung zum Umleiten der Antriebskette an der Antriebseinrichtung entlang und am Personenaufnahmemittel vorbei.Finally, the deflection serves to redirect the drive chain along the drive device along and past the person receiving means.
Die zusätzlichen umlenkenden, nicht angetriebenen Zahnräder tragen zusätzlich zum Spanngewicht dazu bei, dass die Kette nicht springt und der Kraftschluss mit dem antreibenden Zahnrad stets erhalten bleibt.The additional deflecting, non-driven gears in addition to the tension weight contribute to the fact that the chain does not jump and the traction with the driving gear is always maintained.
In einer weiteren bevorzugten Ausführungsform weist der erfindungsgemäße Servicelift eine Hubkraftbegrenzungseinrichtung auf, die dazu eingerichtet ist, in Abhängigkeit einer Relativbewegung zwischen der Antriebseinrichtung und dem Personenaufnahmemittel die Auf- oder Abwärtsbewegung des Servicelifts zu stoppen, wenn eine vorbestimmte Kettenlast überschritten wird. Wenngleich die Gefahr eines Aufschwingens des Servicelifts in vertikaler Richtung bereits durch die Verwendung von Antriebsketten im Vergleich zu Stahlseilen deutlich reduziert wird, kommt es bei Geschwindigkeitsänderungen des Servicelifts, gerade zu Beginn oder Ende eines Bewegungsvorgangs zu einer zeitlich begrenzten Erhöhung der auf die Antriebskette wirkenden Kraft in vertikaler Richtung (Kettenlast). Es hat sich als vorteilhaft herausgestellt, die gesamte Antriebseinrichtung als in sich starres Konstrukt auszulegen, und auch das Personenaufnahmemittel als in sich starres Konstrukt auszulegen, im Gegenzug aber die beiden Einheiten relativ zueinander bewegbar zu machen. Dies ergibt ein mechanisch einfach zu beherrschendes System mit der Möglichkeit, die Anzahl der Freiheitsgrade gering zu halten.In a further preferred embodiment, the service lift according to the invention has a lifting force limiting device, which is set up to stop the upward or downward movement of the service lift as a function of a relative movement between the drive device and the person receiving means when a predetermined chain load is exceeded. Although the risk of vertical lift of the service lift is already significantly reduced by the use of drive chains compared to steel cables, a speed increase of the service lift, at the beginning or end of a movement process, leads to a temporary increase in the force acting on the drive chain vertical direction (chain load). It has been found to be advantageous to design the entire drive device as a structurally rigid construct, and also to design the person receiving means as a structurally rigid construct, but in return to make the two units movable relative to one another. This results in a mechanically easy-to-control system with the ability to keep the number of degrees of freedom low.
Vorzugsweise sind bei dieser Hubkraftbegrenzungseinrichtung die Antriebsmotoren auf einer gemeinsamen Lastaufnahmeplatte montiert, wobei die Lastaufnahmeplatte schwenkbar an dem Personenaufnahmemittel gelagert und von einem Federelement in Richtung des Personenaufnahmemittels vorgespannt ist. Vorzugsweise wird die Schwenkbewegung mittels eines Dämpferelements gehemmt. Die Schwenkachse, worunter die Achse verstanden wird, um welche die Lastaufnahmeplatte relativ zum Personenaufnahmemittel schwenkt, ist vorzugsweise horizontal zu einem aufhängungsseitigen Kraftangriffspunkt der Aufhängung versetzt. Durch diesen seitlichen Versatz der Schwenkachse von dem aufhängungsseitigen Kraftangriffspunkt wird erreicht, dass die von der bauwerkseitigen Aufhängung ausgehende Normalkraft, die an der Antriebskette zieht, einen (wenn auch kleinen) Hebel um die Schwenkachse der Lastaufnahmeplatte herum aufweist. Aufgrund dieses Hebels kommt es zu einer Schwenkbewegung der Lastaufnahmeplatte relativ zum Personenaufnahmemittel, welches sich wiederum mit seinem Masseschwerpunkt im Lot der aufhängungsseitigen Kettenlinie befindet. Alternativ wird bevorzugt, die Schwenkachse koaxial zu der getriebewelle auszurichten. Dadurch wird vorzugsweise allein durch das Drehmoment der Antriebe die Schwenkbewegung der Lastaufnahmeplatte ausgelöst.Preferably, in this Hubkraftbegrenzungseinrichtung the drive motors are mounted on a common load-receiving plate, wherein the load-receiving plate is pivotally mounted on the person receiving means and biased by a spring element in the direction of the person receiving means. Preferably, the pivoting movement is inhibited by means of a damper element. The pivot axis, by which the axis is understood, about which the load-receiving plate pivots relative to the person receiving means is preferably offset horizontally to a suspension-side force application point of the suspension. By this lateral displacement of the pivot axis of the suspension side force application point is achieved that the outgoing of the building-side suspension normal force that pulls on the drive chain, a (albeit small) lever around the pivot axis of the load-receiving plate around. Because of this lever, there is a pivoting movement of the load-receiving plate relative to the person receiving means, which in turn is located with its center of gravity in the Lot of the suspension-side catenary. Alternatively, it is preferred to align the pivot axis coaxially with the gear shaft. As a result, the pivoting movement of the load-bearing plate is preferably triggered solely by the torque of the drives.
Dadurch, dass das Federelement in Richtung des Personenaufnahmemittels vorgespannt ist, wirkt die Feder einer Auslenkung in Folge einer Normalkrafterhöhung der aufhängungsseitigen Kettenlinie entgegen. Über die Stärke der Vorspannung wird somit einstellbar, ab welcher Zugkrafterhöhung überhaupt eine Schwenkbewegung einsetzt.Due to the fact that the spring element is biased in the direction of the person receiving means, the spring counteracts a deflection as a result of a normal increase in the force of the suspension-side chain line. On the strength of the bias is thus adjustable, from which Zugkrafterhöhung ever starts a pivoting movement.
Vorzugsweise ist ein Unterbrechungsschalter für die Antriebseinrichtung derart an dem Personenaufnahmemittel oder der Lastaufnahmeplatte angeordnet, dass er bei Auftreten einer vorbestimmten Auslenkung der Lastaufnahmeplatte gegen die Wirkrichtung des vorgespannten Federelements ausgelöst wird. Bei Auslösen des Unterbrechungsschalters wird der Antriebsmotor vorzugsweise unmittelbar gestoppt. Das vorzugsweise an dem Servicelift vorgesehene Dämpferelement wirkt zwischen der Lastaufnahmeplatte und dem Personenaufnahmemittel, um zu verhindern, dass bei ruckartigem Fahrtbeginn bereits der Unterbrechungsschalter ausgelöst wird.Preferably, an interruption switch for the drive device is arranged on the person receiving means or the load-receiving plate such that it is triggered when a predetermined deflection of the load-receiving plate against the direction of action of the prestressed spring element occurs. When the breaker is triggered, the drive motor is preferably stopped immediately. The damper element, which is preferably provided on the service lift, acts between the load-receiving plate and the person-receiving means in order to prevent the breaker switch from being triggered when the start of the journey is jerky.
In einer weiteren bevorzugten Ausführungsform des Servicelifts weist dieser eine Einrichtung zur Spannungsüberwachung der Antriebsketten auf. Im Laufe des Betriebslebens einer jeden Kette kommt es zu einer Längung der Kette. In extrem seltenen Fällen kann es ferner dazu kommen, dass einzelne Kettenglieder versagen und Rissbildung zeigen, wodurch die Kette insgesamt reißen kann, wenn der Riss nicht rechtzeitig entdeckt wird.In a further preferred embodiment of the service lift, the latter has a device for monitoring the tension of the drive chains. In the course of the life of each chain there is an elongation of the chain. In extremely rare cases, it may also happen that individual chain links fail and Cracking, which can cause the chain to break if the crack is not detected in time.
Da eine optische Überwachung der Antriebskette technisch aufwändig erscheint, wird es bevorzugt, wenn die Einrichtung zur Spannungsüberwachung für jede Antriebseinrichtung ein, vorzugsweise nicht angetriebenes, Zahnrad aufweist, welches relativ zu der jeweiligen Antriebskette nichtparallel auslenkbar ist und mittels eines Federelements in Richtung der jeweiligen Antriebskette gegen diese gedrückt wird. Vorzugsweise ist ferner ein Unterbrechungsschalter für die Antriebseinrichtung derart an dem Zahnrad, einer von dem Federelement mitbewegten Zahnradhalterung, oder der Lastaufnahmeplatte angeordnet ist, dass er bei Auftreten oder Überschreiten einer vorbestimmten Auslenkung des Zahnrads ausgelöst wird. Das mittels des Federelements in Richtung der Antriebskette gegen die Antriebskette gedrückte Zahnrad wirkt dahingehend, die Antriebskette aus ihrer in Folge der Kettenspannung vorgegebenen Orientierung zu verdrängen. Die Kettenspannung arbeitet hiergegen an.Since an optical monitoring of the drive chain appears technically complex, it is preferred if the device for tension monitoring for each drive means, preferably non-driven gear, which is non-parallel deflectable relative to the respective drive chain and by means of a spring element in the direction of the respective drive chain against this is pressed. Preferably, furthermore, an interruption switch for the drive device is arranged on the toothed wheel, one of the spring element mitbewegten gear holder, or the load-receiving plate is that it is triggered upon occurrence or exceeding a predetermined deflection of the gear. The pressed by means of the spring element in the direction of the drive chain against the drive chain gear acts to displace the drive chain from its predetermined due to the chain tension orientation. The chain tension works against this.
Der Unterbrechungsschalter arbeitet vorzugsweise nach dem gleichen Funktionsprinzip wie auch der Unterbrechungsschalter für die Antriebseinrichtung, der in der Hubkraftbegrenzungseinrichtung vorgesehen ist. Bei Erreichen oder Überschreiten einer vorbestimmten Auslenkung des Zahnrades bzw. der das Zahnrad lagernde Zahnradhalterung wird die Stromzufuhr zum Motorantrieb unterbrochen. Beide Motoren werden abgeschaltet.The interruption switch operates preferably according to the same principle of operation as the interruption switch for the drive device, which is provided in the Hubkraftbegrenzungseinrichtung. Upon reaching or exceeding a predetermined deflection of the gear or the gear bearing gear holder, the power supply to the motor drive is interrupted. Both motors are switched off.
Besonders bevorzugt wird es bei dem erfindungsgemäßen Servicelift, wenn die beiden Antriebsmotoren und die mit den Antriebsketten in Eingriff befindlichen Zahnräder für beide Antriebsketten identisch ausgelegt sind, und wenn ferner auch beide Antriebsketten identisch ausgelegt sind. Hierdurch wird ein vollständig redundantes Antriebssystem bereitgestellt, welches im Defektfall des ersten Antriebsstranges sicherstellt, dass, wenn der erste Antriebsstrang ausfällt, der andere Antriebsstrang die Last hält.In the case of the service lift according to the invention, it is particularly preferred if the two drive motors and the gears which are in engagement with the drive chains are designed identically for both drive chains, and if, furthermore, both drive chains are designed identically. This provides a fully redundant drive system which, in the event of a failure of the first driveline, ensures that when the first driveline fails, the other driveline holds the load.
Die Erfindung wird im Folgenden unter Bezugnahme auf die beigefügten Figuren anhand eines bevorzugten Ausführungsbeispiels näher beschrieben. Hierbei zeigen:
- Figuren 1a,b
- unterschiedliche Seitenansichten eines Servicelifts gemäß einem bevorzugten Ausführungsbeispiel,
- Figuren 2a,b
- verschiedene räumliche Detailansichten des Servicelifts gemäß
Figuren 1a,b , Figur 3- eine Seiten-Detailansicht des Servicelifts gemäß
den Figuren 1 ,2 , - Figur 4
- eine weitere Seiten-Detailansicht des Servicelifts gemäß
den Figuren 1 , undbis 3 Figur 5- noch eine weitere Seiten-Detailansicht des Servicelifts gemäß den
Figuren 1 - bis 4.
- FIGS. 1a, b
- different side views of a service lift according to a preferred embodiment,
- FIGS. 2a, b
- different spatial detail views of the service lift according to
FIGS. 1a, b . - FIG. 3
- a side detail view of the service lift according to the
FIGS. 1 .2 . - FIG. 4
- another side detail view of the service lift according to
FIGS. 1 to 3 , and - FIG. 5
- Yet another page detail view of the service lift according to the
FIGS. 1 - to 4.
In den
Das Personenaufnahmemittel 3 ist an einer Aufhängung 5 angebracht, die gebäudeseitig befestigbar ist. Die Aufhängung 5 umfasst eine erste Antriebskette 7a und eine zweite Antriebskette 7b. Eine Getriebeeinrichtung 11 steht mit den Antriebsketten 7a,b in Eingriff. Die Getriebeeinrichtung 11 umfasst einen Motorantrieb 9. Der Motorantrieb 9 wiederum umfasst einen ersten Elektromotor 9a und einen zweiten Elektromotor 9b. Ein Spanngewicht 10 hält die Antriebsketten 7a,b parallel zueinander und auf Spannung.The person receiving means 3 is mounted on a
Weitere Einzelheiten zur Antriebseinrichtung 11 sind in den
Ferner sind die Elektromotoren 9a,b jeweils mit einem Handhebel 23 ausgerüstet. Die Handhebel 23 stellen ein Mittel zur manuellen Entriegelung einer in den Getriebemotoren vorgesehenen elektromagnetischen Bremse dar. Im Notfall, z.B. bei Stromausfall, müssen beide Bremsen geöffnet werden. Dann fährt das Personenaufnahmemittel allein durch die Gewichtskraft nach unten, und die Personen können evakuiert werden.Further, the
Dies ist auch in
Aus
Wie sich aus
Auch ist in
In
Zum Sicherstellen des Umschlingungswinkels für das Antriebs-Zahnrad 33 ist ein weiteres, nicht angetriebenes Zahnrad 37 vorgesehen, welches die Antriebskette 7b umlenkt. Ein drittes, ebenfalls nicht angetriebenes, Zahnrad 39 lenkt die Antriebskette 7b erneut um, so dass diese im Wesentlichen vertikal an der Seite des Personenaufnahmemittels 3 hinab hängen kann.To ensure the wrap angle for the
Ein weiterer in
Sofern unter Bezugnahme auf die
Claims (12)
wobei die Antriebseinrichtung (11) einen Motorantrieb (9) mit einem ersten Antriebsmotor und einem zweiten Antriebsmotor aufweist, die jeweils mit einer der beiden Antriebsketten in Eingriff stehen, wobei die beiden Antriebsmotoren, die mit den Antriebsketten (7a,b) in Eingriff befindlichen Zahnräder für beide Antriebsketten (7a,b), und die Antriebsketten (7a,b) identisch ausgelegt sind, und
die Antriebseinrichtung auf dem Dach des Personenaufnahmemittels (3) mittels einer Montageplatte (15) befestigt ist.Servicelift (1), in particular for installation in or on structures, with a person receiving means (3), a drive means (11) for upward and downward movement of the person receiving means (3), and a suspension (5) which is firmly connected to the building and at which is movable along the service lift (1) of the drive means, wherein the suspension (5) has a first and a second drive chain (7a, b), which is attachable to an attachment point of the structures, and that the drive means for each of the drive chains (7a, b) has one or more gears (33) force-transmittingly engaged with the respective drive chain (7a, b) to translate rotation of the gears into the upward or downward movement of the service lift (1),
wherein the drive means (11) comprises a motor drive (9) having a first drive motor and a second drive motor respectively engaged with one of the two drive chains, the two drive motors being the gears in engagement with the drive chains (7a, b) for both drive chains (7a, b), and the drive chains (7a, b) are designed identical, and
the drive device is fastened on the roof of the person receiving means (3) by means of a mounting plate (15).
dadurch gekennzeichnet, dass die Antriebsmotoren jeweils als Getriebemotoren mit einem Elektromotor (9a,b) und einer elektromagnetischen Bremse ausgebildet sind.Service lift (1) according to claim 1,
characterized in that the drive motors are each designed as geared motors with an electric motor (9a, b) and an electromagnetic brake.
dadurch gekennzeichnet, dass die Antriebsmotoren jeweils eine Fliehkraftbremse und Mittel (21) zur manuellen Entriegelung der elektromagnetischen Bremse aufweisen.Service lift (1) according to claim 2,
characterized in that the drive motors each have a centrifugal brake and means (21) for manual unlocking of the electromagnetic brake.
dadurch gekennzeichnet, dass die Antriebseinrichtung als Kettendurchlaufantrieb ausgebildet ist, wobei die Länge der Antriebsketten (7a,b) derart dimensioniert ist, dass sie sich in montiertem Zustand von der Aufhängung (5) aus durch die Antriebseinrichtung hindurch und am Personenaufnahmemittel (3) seitlich entlang erstrecken, wo sie herunterhängen.Service lift (1) according to one of the preceding claims,
characterized in that the drive means is designed as a chain conveyor drive, wherein the length of the drive chains (7a, b) is dimensioned such that it in the mounted state of the suspension (5) through the drive means and the person receiving means (3) laterally along extend where they hang down.
dadurch gekennzeichnet, dass die Antriebsketten (7a,b) parallel ausgerichtet sind, vorzugsweise auf der gleichen Seite des Servicelifts (1) an dem Personenaufnahmemittel (3) vorbeigeführt sind, und mittels eines Spanngewichts in vertikaler Richtung auf Zug gehalten werden.Service lift (1) according to one of the preceding claims,
characterized in that the drive chains (7a, b) are aligned parallel, preferably on the same side of the service lift (1) on the person receiving means (3) are passed, and held by a clamping weight in the vertical direction to train.
dadurch gekennzeichnet, dass das Spanngewicht als gemeinsames Spanngewicht für beide Antriebsketten (7a,b) ausgebildet ist, oder je Antriebskette (7a,b) ein einzelnes Spanngewicht aufweist.Service lift (1) according to claim 5,
characterized in that the tensioning weight is designed as a common tensioning weight for both drive chains (7a, b), or per drive chain (7a, b) has a single tensioning weight.
dadurch gekennzeichnet, dass die Antriebsketten (7a,b) von der Antriebseinrichtung mehrfach umgelenkt werden.Service lift (1) according to one of the preceding claims,
characterized in that the drive chains (7a, b) are deflected several times by the drive means.
gekennzeichnet durch eine Hubkraftbegrenzungseinrichtung, die dazu eingerichtet ist, in Abhängigkeit einer Relativbewegung zwischen der Antriebseinrichtung und dem Personenaufnahmemittel (3) die Auf- oder Abwärtsbewegung des Servicelifts (1) zu stoppen, wenn eine vorbestimmte Kettenlast überschritten wird.Service lift (1) according to one of the preceding claims,
characterized by a Hubkraftbegrenzungseinrichtung which is adapted to stop depending on a relative movement between the drive means and the personal receiving means (3) the up or down movement of the service lift (1) when a predetermined chain load is exceeded.
dadurch gekennzeichnet, dass die Antriebsmotoren auf einer gemeinsamen Lastaufnahmeplatte (17) montiert sind, wobei
characterized in that the drive motors are mounted on a common load-receiving plate (17), wherein
gekennzeichnet durch eine Einrichtung zur Spannungsüberwachung der Antriebsketten (7a,b).Service lift (1) according to one of the preceding claims,
characterized by a device for monitoring the tension of the drive chains (7a, b).
dadurch gekennzeichnet, dass die Einrichtung zur Spannungsüberwachung für jeden Antriebsmotor ein, vorzugsweise nichtangetriebenes, Zahnrad aufweist, welches relativ zu der jeweiligen Antriebskette nichtparallel auslenkbar ist und mittels eines Federelements in Richtung der jeweiligen Antriebskette (7a,b) gedrückt wird, und ein Unterbrechungsschalter (29) für die Antriebseinrichtung derart an dem Zahnrad, einer von dem Federelement mitbewegten Zahnradhalterung (45), oder der Lastaufnahmeplatte (17) angeordnet ist, dass er bei Auftreten oder Überschreiten einer vorbestimmten Auslenkung des Zahnrades ausgelöst wird.Service lift (1) according to claim 10,
characterized in that the means for voltage monitoring for each drive motor has a, preferably non-driven, gear which is non-parallel deflectable relative to the respective drive chain and by means of a spring element in the direction of the respective drive chain (7a, b) is pressed, and an interruption switch (29 ) is arranged for the drive means such on the gear, one of the spring member mitbewegten gear holder (45), or the load-receiving plate (17) that it is triggered upon occurrence or exceeding a predetermined deflection of the gear.
dadurch gekennzeichnet, dass die Antriebseinrichtung (11) für jede Antriebskette jeweils Mittel (23) zum manuellen Verändern der Kettenspannung aufweist.Service lift (1) according to one of the preceding claims,
characterized in that the drive means (11) for each drive chain each having means (23) for manually changing the chain tension.
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CN113233290A (en) * | 2021-05-13 | 2021-08-10 | 安徽汉神机电有限公司 | Car locking integral type aggregate unit |
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2014
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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CN113233290A (en) * | 2021-05-13 | 2021-08-10 | 安徽汉神机电有限公司 | Car locking integral type aggregate unit |
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