EP3479894B1 - Shaker - Google Patents

Shaker Download PDF

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Publication number
EP3479894B1
EP3479894B1 EP17199729.9A EP17199729A EP3479894B1 EP 3479894 B1 EP3479894 B1 EP 3479894B1 EP 17199729 A EP17199729 A EP 17199729A EP 3479894 B1 EP3479894 B1 EP 3479894B1
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EP
European Patent Office
Prior art keywords
tray
shaft
hollow shaft
shaker
shaker according
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.)
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Application number
EP17199729.9A
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German (de)
French (fr)
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EP3479894A1 (en
Inventor
Alexander Hawrylenko
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Infors AG
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Infors AG
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Publication date
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Priority to EP17199729.9A priority Critical patent/EP3479894B1/en
Priority to US16/177,521 priority patent/US11253827B2/en
Publication of EP3479894A1 publication Critical patent/EP3479894A1/en
Application granted granted Critical
Publication of EP3479894B1 publication Critical patent/EP3479894B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/20—Mixing the contents of independent containers, e.g. test tubes
    • B01F31/22—Mixing the contents of independent containers, e.g. test tubes with supporting means moving in a horizontal plane, e.g. describing an orbital path for moving the containers about an axis which intersects the receptacle axis at an angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F2215/00—Auxiliary or complementary information in relation with mixing
    • B01F2215/04—Technical information in relation with mixing
    • B01F2215/0413—Numerical information
    • B01F2215/0436—Operational information
    • B01F2215/0481—Numerical speed values
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/20—Mixing the contents of independent containers, e.g. test tubes
    • B01F31/201—Holders therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
    • B01F31/00—Mixers with shaking, oscillating, or vibrating mechanisms
    • B01F31/20—Mixing the contents of independent containers, e.g. test tubes
    • B01F31/265—Mixing the contents of independent containers, e.g. test tubes the vibrations being caused by an unbalanced rotating member

Definitions

  • the invention relates to a shaker, in particular a laboratory shaker, in particular for shaking and/or mixing samples containing liquid.
  • Shakers are used to shake and/or mix liquids in vessels, eg cell cultures, biofuels or blood samples.
  • the shaken unit often includes a tray on which the vessels, eg Erlenmeyer flasks, test tubes or other ampoules with the samples are located.
  • a high shaking frequency is desirable.
  • liquid can be spilled or splashed on the tray during the shaking process, and other components such as a drive of the shaker can also be contaminated.
  • EN19814013 discloses a shaker according to the preamble of claim 1.
  • the task is therefore to construct a shaker with a high shaking frequency, which is designed in such a way that the cleaning effort in the event of contamination is as low as possible.
  • the shaker comprises a frame, a tray for receiving one or more samples and a drive for the tray, in which a tray shaft is eccentric in a drivable hollow shaft is stored.
  • the shelf shaft is firmly connected to the shelf and secured against rotation relative to the frame.
  • the frame is preferably a rigid assembly of one or more elements that allows the shaker to be placed on or mounted on a work surface or incorporated into other equipment such as an incubator for cell culture or microbial applications.
  • the shelf is preferably a support whose surface area is greater than its height, e.g. a plate.
  • the samples are liquids, e.g. cell cultures, biofuels or blood samples, and are in vessels, e.g. Erlenmeyer flasks, test tubes or other ampoules.
  • the tray preferably includes attachment options for the vessels.
  • the drive for the tray preferably includes a motor, in particular an electric motor, and a mechanism for driving the shafts.
  • the hollow shaft is mounted on the frame, preferably with a ball bearing, and contains a cavity in which the tray shaft is located.
  • the tray shaft is mounted in the hollow shaft with a needle bearing and/or a ball bearing.
  • the bearing enables low-friction rotation and high shaking frequencies with a compact design.
  • the axes of rotation of the hollow shaft and the shelf shaft are parallel to one another, but have a spatial offset, ie an eccentric position. This eccentricity determines the deflection of the circular shaking movement of the tray.
  • the eccentricity of the tray shaft relative to the hollow shaft is at most 25 mm and in particular 1.5 mm.
  • the tray shaft is firmly connected to the tray during operation of the shaker, tray shaft and tray are secured against rotation relative to each other.
  • the connection is preferably designed in such a way that Tray can be removed from the tray shaft by the user, eg for cleaning.
  • the tray shaft engages in the center of gravity or in the geometric center of the tray, in order not to load the connection and the needle bearing with an imbalance.
  • the shaker advantageously includes a cover between the tray and the drive.
  • the cover is preferably sealed against the hollow shaft and preferably includes a trough.
  • it can be made of metal, plastic, glass or plexiglass, comprise one or more elements and partially or completely enclose the tray.
  • a trough would start from a plate at z ⁇ 0 in the entire xy plane up to a Height z>0 form a border around the shelf.
  • the trough could also be designed as a container around the entire tray including the sample vessels.
  • the cover prevents contamination of the drive with liquids or solid objects, for example if a vessel with a sample falls over and leaks or liquid is splashed.
  • the cover is also removable for the user. This facilitates the cleaning of the shaker, which is essential for further use, since persistent soiling of the shaker can contaminate further samples.
  • only the tray shaft is located between the tray and the cover, so that if it is dirty, only the tray, the tray shaft and the cover, and not other drive elements, have to be cleaned.
  • the tray shaft is countered Rotation secured to the frame.
  • a preferred embodiment of the security against rotation is described below.
  • the tray shaft is secured against rotation relative to the frame according to the present invention. This allows the drive and the safety mechanism to be relocated under the cover. This makes it easier to clean the shaker when it is dirty and, in addition, higher shaking frequencies and thus better mixing of the samples can be achieved.
  • the shaking frequency of the tray as a result of the drive is at least 1000 rpm, in particular at least 1400 rpm.
  • the shaker comprises a second hollow shaft, which is mounted on the frame, and a second tray shaft, which is mounted eccentrically in the second hollow shaft and is also secured against rotation on the connecting element.
  • the second shelf shaft has the same eccentric position relative to the second hollow shaft as the shelf shaft relative to the hollow shaft, so the structure of the shafts at both ends of the connecting element is analogous in this embodiment.
  • the hollow shaft has a pulley for driving via a toothed belt.
  • the toothed belt ensures the transmission of rotation from one motor shaft to the hollow shaft.
  • the shaking frequency can preferably be defined by the user.
  • a pulley for a drive through the toothed belt is also attached to the second hollow shaft, which has the same diameter as the pulley has on the hollow shaft. This ensures that the quill and the second quill rotate at the same frequency and in phase.
  • the shaker includes a gear train for driving the hollow shaft. At least one gear wheel is located on the hollow shaft and preferably also on the second hollow shaft.
  • the connecting element advantageously comprises an elastic element to compensate for changes in the distance between its two attachment points on the tray shaft and the second tray shaft. Such changes in distance can occur, for example, as a result of thermal expansion or as a result of inaccuracies in production, or they can be caused by a slightly phase-shifted rotation of the hollow shaft and the second hollow shaft.
  • the elastic element therefore allows the shaker to operate optimally even with mechanical inaccuracies and is therefore important for problem-free use over a long period of time.
  • the elastic element is a spring, in particular a leaf spring.
  • Other embodiments of the elastic element for example a piece of hard rubber, are conceivable.
  • At least one counterweight on the hollow shaft also contributes to smooth operation of the shaker for balancing an imbalance occurring due to eccentric mass distribution.
  • the counterweight or counterweights are preferably located on the side of the cover facing the drive so as not to be affected by possible contamination.
  • other shafts are also balanced with one or more counterweights, for example the shelf shaft.
  • the preferably at least one counterweight protects the bearings and enables continuous operation of the shaker with high shaking frequencies.
  • a preferred embodiment of the invention is in 1 and 2 shown.
  • 1 shows a view from below of a shaker according to an embodiment of the invention with frame 1, drive 3-6 and eccentrically mounted connecting element 11.
  • the shaker comprises a frame 1, which is made of metal or plastic, for example, and stands on four feet 2.
  • a motor such as an electric motor, which drives a pulley 3 .
  • Two further belt pulleys 4 and 5 are driven via a toothed belt 6, which prevents slippage.
  • the second belt pulley 4 driven by the toothed belt 6 is seated on a hollow shaft 7 which is rotatably mounted on the frame 1 via ball bearings 16 .
  • the second driven by the toothed belt 6 pulley 5 sits on a second Hollow shaft 18, which is preferably also rotatably mounted on the frame 1 via ball bearings 16.
  • a tray shaft 8 Inside the hollow shaft 7 there is a tray shaft 8 whose axis of rotation is parallel to that of the hollow shaft 7 .
  • the tray shaft 8 is mounted eccentrically in the hollow shaft 7, e.g. with an offset of the rotation axes of 1.5 mm, which leads to a circular movement of the tray shaft 8, in the example with a total deflection of 3 mm. Needle bearings 15 and/or ball bearings 19 are used for low-friction mounting of the tray shaft 8 in the hollow shaft 7 .
  • a tray 9 is firmly connected to the tray shaft 8 and serves as a platform or receptacle for sample vessels to be shaken.
  • the tray 9 can be equipped with a sample holder or have attachment options for Erlenmeyer flasks, test tubes or other ampoules. The tray 9 can be removed for cleaning purposes.
  • the tray shaft 8 is also firmly connected to a coupling rod 11, the attachment 13 of the coupling rod 11 on the tray shaft 8 not being rotatable.
  • the coupling rod serves as a connecting element to a second tray shaft 14.
  • the second tray shaft 14 is mounted eccentrically in the second hollow shaft 18, analogously and with the same eccentricity as in the arrangement of tray shaft 8 and hollow shaft 7.
  • the second tray shaft 14 is also on the coupling rod 11 secured against rotation, so that both the tray shaft 8 and the second tray shaft 14 are secured against rotation relative to the frame 1.
  • the coupling rod 11 is preferably a metal sheet that is welded to the tray shaft 8 and the second tray shaft 14 .
  • the two pulleys 4 and 5 on the hollow shaft 7 and the second hollow shaft 18 run in phase as a result of being driven by the toothed belt 6 .
  • connection of the coupling rod 11 to the second tray shaft 14 is ideally established by a leaf spring 12, which as an elastic element can compensate for changes in distance, e.g. as a result of thermal expansion or inaccurate manufacture.
  • the cover 10 between the tray 9 and the frame 1 including the drive mechanism, which is firmly connected to the frame 1 and sealed at the passage of the tray shaft 8 .
  • the cover 10 protects the drive mechanism from contamination by solid bodies and liquids, e.g. in the event that a sample vessel on the tray 9 tips over and leaks or liquids are splashed.
  • the cover 10 is preferably designed as a trough which is sealed against solids and liquids on the hollow shaft 7 . Only the tray 9, a part of the tray shaft 8 and the samples in the vessels on the tray 9 are located inside the trough. As a result, only these elements have to be cleaned when they are dirty, while the drive mechanism, which would be difficult to clean, remains clean.
  • At least one counterweight 17 is also fastened to the hollow shaft 7 and compensates for an imbalance that occurs as a result of the eccentric mass distribution of the tray 9 , sample holders, samples and tray shaft 8 .
  • a counterweight can also be attached to the tray shaft 8 in order to achieve dynamic balancing of the system. Compensating for the imbalance protects the bearings, reduces noise emissions and extends the service life of the drive.
  • the structure of the shaker described makes it possible to achieve high shaking frequencies of more than 1000 rpm and in particular from 1000 to 1600 rpm or more as a result of the drive.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Mixers With Rotating Receptacles And Mixers With Vibration Mechanisms (AREA)
  • Automatic Analysis And Handling Materials Therefor (AREA)

Description

Gebiet der Erfindungfield of invention

Die Erfindung betrifft einen Schüttler, insbesondere einen Laborschüttler, insbesondere für das Schütteln und/oder Durchmischen von Flüssigkeit enthaltenden Proben.The invention relates to a shaker, in particular a laboratory shaker, in particular for shaking and/or mixing samples containing liquid.

Hintergrundbackground

Schüttler werden verwendet, um Flüssigkeiten, z.B. Zellkulturen, Biotreibstoffe oder Blutproben, in Gefässen zu schütteln und/oder zu durchmischen. Häufig umfasst die geschüttelte Einheit ein Tablar, auf welchem sich die Gefässe, z.B. Erlenmeyerkolben, Reagenzgläser oder sonstige Ampullen, mit den Proben befinden. Dabei ist einerseits eine hohe Schüttelfrequenz wünschenswert. Andererseits kann beim Schüttelvorgang Flüssigkeit auf dem Tablar verschüttet oder verspritzt werden, wobei auch weitere Bauteile wie ein Antrieb des Schüttlers kontaminiert werden können. Bei herkömmlichen Schüttlern sind von einer solchen Kontamination zahlreiche Bauteile betroffen, sodass die erforderliche Reinigung einen erheblichen Aufwand darstellt. DE 19814013 offenbart einen Schüttler gemäß dem Oberbegriff des Anspruch 1.Shakers are used to shake and/or mix liquids in vessels, eg cell cultures, biofuels or blood samples. The shaken unit often includes a tray on which the vessels, eg Erlenmeyer flasks, test tubes or other ampoules with the samples are located. On the one hand, a high shaking frequency is desirable. On the other hand, liquid can be spilled or splashed on the tray during the shaking process, and other components such as a drive of the shaker can also be contaminated. With conventional shakers, numerous components are affected by such contamination, so that the necessary cleaning represents a considerable effort. EN19814013 discloses a shaker according to the preamble of claim 1.

Es stellt sich daher die Aufgabe, einen Schüttler mit hoher Schüttelfrequenz zu konstruieren, der so gestaltet ist, dass der Reinigungsaufwand bei einer Kontamination möglichst gering ist.The task is therefore to construct a shaker with a high shaking frequency, which is designed in such a way that the cleaning effort in the event of contamination is as low as possible.

Darstellung der ErfindungPresentation of the invention

Diese Aufgabe wird durch den Gegenstand von Anspruch 1 gelöst. Demgemäss umfasst der Schüttler einen Rahmen, ein Tablar für die Aufnahme von einer oder mehreren Proben und einen Antrieb für das Tablar, bei dem eine Tablarwelle exzentrisch in einer antreibbaren Hohlwelle gelagert ist. Die Tablarwelle ist fest mit dem Tablar verbunden und gegen Rotation gegenüber dem Rahmen gesichert.This object is solved by the subject matter of claim 1. Accordingly, the shaker comprises a frame, a tray for receiving one or more samples and a drive for the tray, in which a tray shaft is eccentric in a drivable hollow shaft is stored. The shelf shaft is firmly connected to the shelf and secured against rotation relative to the frame.

Der Rahmen ist bevorzugt ein starrer Aufbau aus einem oder mehreren Elementen, der das Abstellen oder Befestigen des Schüttlers auf einer Arbeitsfläche oder den Einbau in einem anderen Gerät, z.B. einem Inkubator für Zellkulturen oder mikrobielle Anwendungen, ermöglicht. Das Tablar ist vorzugsweise ein Träger, dessen flächige Ausdehnung grösser ist als seine Höhe, z.B. eine Platte. Typischerweise sind die Proben Flüssigkeiten, z.B. Zellkulturen, Biotreibstoffe oder Blutproben, und befinden sich in Gefässen, z.B. Erlenmeyerkolben, Reagenzgläsern oder sonstigen Ampullen. Das Tablar umfasst bevorzugt Befestigungsmöglichkeiten für die Gefässe. Der Antrieb für das Tablar umfasst bevorzugt einen Motor, im Speziellen einen Elektromotor, und eine Mechanik zum Antrieb der Wellen.The frame is preferably a rigid assembly of one or more elements that allows the shaker to be placed on or mounted on a work surface or incorporated into other equipment such as an incubator for cell culture or microbial applications. The shelf is preferably a support whose surface area is greater than its height, e.g. a plate. Typically, the samples are liquids, e.g. cell cultures, biofuels or blood samples, and are in vessels, e.g. Erlenmeyer flasks, test tubes or other ampoules. The tray preferably includes attachment options for the vessels. The drive for the tray preferably includes a motor, in particular an electric motor, and a mechanism for driving the shafts.

Die Hohlwelle ist am Rahmen gelagert, bevorzugt mit einem Kugellager, und enthält einen Hohlraum, in dem sich die Tablarwelle befindet. In einer bevorzugten Ausführung ist die Tablarwelle mit einem Nadellager und/oder einem Kugellager in der Hohlwelle gelagert. Durch das Lager werden eine reibungsarme Rotation und hohe Schüttelfrequenzen bei einer kompakten Bauweise ermöglicht. Die Rotationsachsen der Hohlwelle und der Tablarwelle sind parallel zueinander, weisen aber einen räumlichen Versatz, also eine exzentrische Lage, auf. Diese Exzentrizität bestimmt die Auslenkung der kreisförmigen Schüttelbewegung des Tablars. In einer bevorzugten Ausführung beträgt die Exzentrizität der Tablarwelle gegenüber der Hohlwelle höchstens 25 mm und insbesondere 1.5 mm.The hollow shaft is mounted on the frame, preferably with a ball bearing, and contains a cavity in which the tray shaft is located. In a preferred embodiment, the tray shaft is mounted in the hollow shaft with a needle bearing and/or a ball bearing. The bearing enables low-friction rotation and high shaking frequencies with a compact design. The axes of rotation of the hollow shaft and the shelf shaft are parallel to one another, but have a spatial offset, ie an eccentric position. This eccentricity determines the deflection of the circular shaking movement of the tray. In a preferred embodiment, the eccentricity of the tray shaft relative to the hollow shaft is at most 25 mm and in particular 1.5 mm.

Die Tablarwelle ist während des Betriebs des Schüttlers fest mit dem Tablar verbunden, Tablarwelle und Tablar sind gegen Rotation relativ zueinander gesichert. Die Verbindung ist vorzugsweise so gestaltet, dass das Tablar durch den Benutzer von der Tablarwelle abgenommen werden kann, z.B. zur Reinigung. In einer bevorzugten Ausführung greift die Tablarwelle im Schwerpunkt oder im geometrischen Mittelpunkt des Tablars an, um die Verbindung und das Nadellager nicht mit einer Unwucht zu belasten.The tray shaft is firmly connected to the tray during operation of the shaker, tray shaft and tray are secured against rotation relative to each other. The connection is preferably designed in such a way that Tray can be removed from the tray shaft by the user, eg for cleaning. In a preferred embodiment, the tray shaft engages in the center of gravity or in the geometric center of the tray, in order not to load the connection and the needle bearing with an imbalance.

Vorteilhaft umfasst der Schüttler eine Abdeckung zwischen Tablar und Antrieb. Die Abdeckung ist bevorzugt gegen die Hohlwelle abgedichtet und umfasst bevorzugt eine Wanne. Sie kann beispielsweise aus Metall, Kunststoff, Glas oder Plexiglas bestehen, ein oder mehrere Elemente umfassen und das Tablar teilweise oder ganz umschliessen. In einem Koordinatensystem, in dem das Tablar in der xy-Ebene bei z=0 liegt und die Tablarwelle einen Teil der negativen z-Achse bildet, würde eine Wanne ausgehend von einer Platte bei z<0 in der gesamten xy-Ebene bis zu einer Höhe z>0 einen Rand um das Tablar herum bilden. Mit einer Erweiterung durch einen Deckel auf einer Höhe z>0 könnte die Wanne auch als Behältnis um das gesamte Tablar samt Probengefässen herum ausgebildet sein.The shaker advantageously includes a cover between the tray and the drive. The cover is preferably sealed against the hollow shaft and preferably includes a trough. For example, it can be made of metal, plastic, glass or plexiglass, comprise one or more elements and partially or completely enclose the tray. In a coordinate system in which the tray is in the xy plane at z=0 and the tray shaft forms part of the negative z-axis, a trough would start from a plate at z<0 in the entire xy plane up to a Height z>0 form a border around the shelf. With an extension by a lid at a height z>0, the trough could also be designed as a container around the entire tray including the sample vessels.

Die Abdeckung verhindert eine Verschmutzung des Antriebs mit Flüssigkeiten oder Festkörpern, wenn beispielsweise ein Gefäss mit einer Probe umfällt und ausläuft oder Flüssigkeit verspritzt wird. Vorzugsweise ist auch die Abdeckung für den Benutzer abnehmbar. Dies erleichtert die Reinigung des Schüttlers, die essentiell für die weitere Verwendung ist, da eine fortbestehende Verschmutzung des Schüttlers weitere Proben kontaminieren kann. Vorteilhaft befindet sich zwischen Tablar und Abdeckung ausschliesslich die Tablarwelle, sodass bei Verschmutzung nur das Tablar, die Tablarwelle und die Abdeckung, nicht aber weitere Antriebselemente gereinigt werden müssen.The cover prevents contamination of the drive with liquids or solid objects, for example if a vessel with a sample falls over and leaks or liquid is splashed. Preferably the cover is also removable for the user. This facilitates the cleaning of the shaker, which is essential for further use, since persistent soiling of the shaker can contaminate further samples. Advantageously, only the tray shaft is located between the tray and the cover, so that if it is dirty, only the tray, the tray shaft and the cover, and not other drive elements, have to be cleaned.

Um zu verhindern, dass Tablarwelle und Tablar sich beim Ausführen der kreisförmigen Schüttelbewegung mit der Hohlwelle mitdrehen, ist die Tablarwelle gegen Rotation gegenüber dem Rahmen gesichert. Eine bevorzugte Ausführungsform der Sicherung gegen Rotation wird weiter unten beschrieben. Anstelle der herkömmlichen Sicherung des Tablars gegen Rotation wird gemäss der vorliegenden Erfindung die Tablarwelle gegen Rotation gegenüber dem Rahmen gesichert. Dadurch wird eine Verlagerung des Antriebs und der Sicherungsmechanik unter die Abdeckung ermöglicht. So ist die Reinigung des Schüttlers bei Verschmutzung leichter und zusätzlich können höhere Schüttelfrequenzen und damit eine bessere Durchmischung der Proben erreicht werden. In einer bevorzugten Ausführung beträgt die Schüttelfrequenz des Tablars infolge des Antriebs mindestens 1000 rpm, insbesondere mindestens 1400 rpm.In order to prevent the tray shaft and tray from rotating with the hollow shaft when the circular shaking movement is carried out, the tray shaft is countered Rotation secured to the frame. A preferred embodiment of the security against rotation is described below. Instead of the conventional securing of the tray against rotation, the tray shaft is secured against rotation relative to the frame according to the present invention. This allows the drive and the safety mechanism to be relocated under the cover. This makes it easier to clean the shaker when it is dirty and, in addition, higher shaking frequencies and thus better mixing of the samples can be achieved. In a preferred embodiment, the shaking frequency of the tray as a result of the drive is at least 1000 rpm, in particular at least 1400 rpm.

Die Sicherung der Tablarwelle gegen Rotation gegenüber dem Rahmen wird mit einem Verbindungselement erreicht, das verdrehsicher an der Tablarwelle befestigt ist, insbesondere wobei das Verbindungselement einen Kopplungsstab enthält. Weiterhin umfasst der Schüttler eine zweite Hohlwelle, die am Rahmen gelagert ist, und eine zweite Tablarwelle, die exzentrisch in der zweiten Hohlwelle gelagert und am Verbindungselement ebenfalls verdrehsicher befestigt ist. Dabei weist die zweite Tablarwelle relativ zur zweiten Hohlwelle die gleiche exzentrische Position auf wie die Tablarwelle zur Hohlwelle, der Aufbau der Wellen an beiden Enden des Verbindungselements ist in dieser Ausführung also analog.Securing the tray shaft against rotation relative to the frame is achieved with a connecting element that is secured against rotation on the tray shaft, in particular with the connecting element containing a coupling rod. Furthermore, the shaker comprises a second hollow shaft, which is mounted on the frame, and a second tray shaft, which is mounted eccentrically in the second hollow shaft and is also secured against rotation on the connecting element. The second shelf shaft has the same eccentric position relative to the second hollow shaft as the shelf shaft relative to the hollow shaft, so the structure of the shafts at both ends of the connecting element is analogous in this embodiment.

In einer Ausführung weist die Hohlwelle eine Riemenscheibe für den Antrieb über einen Zahnriemen auf. Der Zahnriemen stellt die Übertragung der Rotation von einer Welle des Motors auf die Hohlwelle sicher. Bevorzugt kann dabei die Schüttelfrequenz durch den Benutzer definiert werden. Vorteilhaft ist auch an der zweiten Hohlwelle eine Riemenscheibe für einen Antrieb durch den Zahnriemen befestigt, die den gleichen Durchmesser wie die Riemenscheibe auf der Hohlwelle hat. Dies stellt sicher, dass die Hohlwelle und die zweite Hohlwelle mit der gleichen Frequenz und in Phase rotieren. In einer anderen Ausführung umfasst der Schüttler zum Antrieb der Hohlwelle ein Zahnradgetriebe. Dabei befindet sich auf der Hohlwelle und bevorzugt auch der zweiten Hohlwelle je mindestens ein Zahnrad.In one embodiment, the hollow shaft has a pulley for driving via a toothed belt. The toothed belt ensures the transmission of rotation from one motor shaft to the hollow shaft. The shaking frequency can preferably be defined by the user. Advantageously, a pulley for a drive through the toothed belt is also attached to the second hollow shaft, which has the same diameter as the pulley has on the hollow shaft. This ensures that the quill and the second quill rotate at the same frequency and in phase. In another embodiment, the shaker includes a gear train for driving the hollow shaft. At least one gear wheel is located on the hollow shaft and preferably also on the second hollow shaft.

Vorteilhaft umfasst das Verbindungselement zum Ausgleich von Abstandänderungen zwischen seinen beiden Befestigungspunkten an Tablarwelle und zweiter Tablarwelle ein elastisches Element. Solche Abstandsänderungen können beispielsweise durch thermische Ausdehnung oder durch Ungenauigkeiten bei der Fertigung auftreten, oder sie können durch eine leicht phasenverschobene Rotation von Hohlwelle und zweiter Hohlwelle verursacht werden. Das elastische Element ermöglicht also den optimalen Betrieb des Schüttlers auch bei mechanischen Ungenauigkeiten und ist daher wichtig für eine problemlose Nutzung über längere Zeit. In einer Ausführung ist das elastische Element eine Feder, im Speziellen eine Blattfeder. Andere Ausführungsformen des elastischen Elements, beispielsweise ein Stück Hartgummi, sind denkbar.The connecting element advantageously comprises an elastic element to compensate for changes in the distance between its two attachment points on the tray shaft and the second tray shaft. Such changes in distance can occur, for example, as a result of thermal expansion or as a result of inaccuracies in production, or they can be caused by a slightly phase-shifted rotation of the hollow shaft and the second hollow shaft. The elastic element therefore allows the shaker to operate optimally even with mechanical inaccuracies and is therefore important for problem-free use over a long period of time. In one embodiment, the elastic element is a spring, in particular a leaf spring. Other embodiments of the elastic element, for example a piece of hard rubber, are conceivable.

Zum reibungslosen Betrieb des Schüttlers trägt in einer vorteilhaften Ausführung zudem mindestens ein Gegengewicht an der Hohlwelle zur Balancierung einer durch exzentrische Massenverteilung auftretenden Unwucht bei. Bevorzugt befinden sich das oder die Gegengewichte auf der dem Antrieb zugewandten Seite der Abdeckung, um nicht von einer möglichen Kontamination betroffen zu sein. In einer Ausführungsform sind auch weitere der Wellen mit einem oder mehreren Gegengewichten ausbalanciert, z.B. die Tablarwelle. Das bevorzugt mindestens eine Gegengewicht schont die Lager und ermöglicht einen kontinuierlichen Betrieb des Schüttlers mit hohen Schüttelfrequenzen.In an advantageous embodiment, at least one counterweight on the hollow shaft also contributes to smooth operation of the shaker for balancing an imbalance occurring due to eccentric mass distribution. The counterweight or counterweights are preferably located on the side of the cover facing the drive so as not to be affected by possible contamination. In one embodiment, other shafts are also balanced with one or more counterweights, for example the shelf shaft. The preferably at least one counterweight protects the bearings and enables continuous operation of the shaker with high shaking frequencies.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Weitere Ausgestaltungen, Vorteile und Anwendungen der Erfindung ergeben sich aus den abhängigen Ansprüchen und aus der nun folgenden Beschreibung anhand der Figuren. Dabei zeigen:

  • Fig. 1 eine Ansicht von unten auf einen Schüttler nach einem Ausführungsbeispiel der Erfindung mit Rahmen, Antrieb und exzentrisch gelagertem Verbindungselement und
  • Fig. 2 einen vertikalen Schnitt durch den Schüttler aus Fig. 1 entlang der Diagonale A-A', die durch die Wellen der beiden grösseren Riemenscheiben geht.
Further configurations, advantages and applications of the invention result from the dependent claims and from the following description based on the figures. show:
  • 1 a view from below of a shaker according to an embodiment of the invention with frame, drive and eccentrically mounted connecting element and
  • 2 a vertical cut through the shaker 1 along the diagonal A-A' that goes through the shafts of the two larger pulleys.

Wege zur Ausführung der ErfindungWays to carry out the invention

Eine bevorzugte Ausführung der Erfindung ist in Fig. 1 und Fig. 2 dargestellt. Fig. 1 zeigt eine Ansicht von unten auf einen Schüttler nach einem Ausführungsbeispiel der Erfindung mit Rahmen 1, Antrieb 3-6 und exzentrisch gelagertem Verbindungselement 11. Der Schüttler umfasst einen Rahmen 1, der beispielsweise aus Metall oder Kunststoff gefertigt ist und auf vier Füssen 2 steht.A preferred embodiment of the invention is in 1 and 2 shown. 1 shows a view from below of a shaker according to an embodiment of the invention with frame 1, drive 3-6 and eccentrically mounted connecting element 11. The shaker comprises a frame 1, which is made of metal or plastic, for example, and stands on four feet 2.

Am Rahmen 1 ist ein Motor angebracht, z.B. ein Elektromotor, der eine Riemenscheibe 3 antreibt. Über einen Zahnriemen 6, der Schlupf vermeidet, werden zwei weitere Riemenscheiben 4 und 5 angetrieben, welche auf Wellen sitzen, die im Folgenden näher beschrieben werden.Mounted on the frame 1 is a motor, such as an electric motor, which drives a pulley 3 . Two further belt pulleys 4 and 5 are driven via a toothed belt 6, which prevents slippage.

Fig. 2 zeigt einen vertikalen Schnitt durch den Schüttler entlang der Diagonale A-A', die durch die Wellen der beiden Riemenscheiben 4 und 5 geht. Die erste durch den Zahnriemen 6 angetriebene Riemenscheibe 4 sitzt auf einer Hohlwelle 7, die über Kugellager 16 drehbar am Rahmen 1 gelagert ist. Die zweite durch den Zahnriemen 6 angetriebene Riemenscheibe 5 sitzt auf einer zweiten Hohlwelle 18, die bevorzugt ebenfalls über Kugellager 16 drehbar am Rahmen 1 gelagert ist. 2 shows a vertical section through the shaker along the diagonal A-A' passing through the shafts of the two pulleys 4 and 5. The first belt pulley 4 driven by the toothed belt 6 is seated on a hollow shaft 7 which is rotatably mounted on the frame 1 via ball bearings 16 . The second driven by the toothed belt 6 pulley 5 sits on a second Hollow shaft 18, which is preferably also rotatably mounted on the frame 1 via ball bearings 16.

Innerhalb der Hohlwelle 7 befindet sich eine Tablarwelle 8, deren Rotationsachse parallel zu derjenigen der Hohlwelle 7 ist. Die Tablarwelle 8 ist exzentrisch in der Hohlwelle 7 gelagert, z.B. mit einem Versatz der Rotationsachsen von 1.5 mm, was zu einer kreisförmigen Bewegung der Tablarwelle 8 führt, im Beispiel mit einer Auslenkung um insgesamt 3 mm. Zur reibungsarmen Lagerung der Tablarwelle 8 in der Hohlwelle 7 werden Nadellager 15 und/oder Kugellager 19 verwendet.Inside the hollow shaft 7 there is a tray shaft 8 whose axis of rotation is parallel to that of the hollow shaft 7 . The tray shaft 8 is mounted eccentrically in the hollow shaft 7, e.g. with an offset of the rotation axes of 1.5 mm, which leads to a circular movement of the tray shaft 8, in the example with a total deflection of 3 mm. Needle bearings 15 and/or ball bearings 19 are used for low-friction mounting of the tray shaft 8 in the hollow shaft 7 .

Mit der Tablarwelle 8 ist ein Tablar 9 fest verbunden, das als Plattform oder Aufnahme für zu schüttelnde Probengefässe dient. Dazu kann das Tablar 9 mit einem Probenhalter ausgestattet sein oder Befestigungsmöglichkeiten für Erlenmeyerkolben, Reagenzgläser oder andere Ampullen aufweisen. Das Tablar 9 ist zu Reinigungszwecken abnehmbar.A tray 9 is firmly connected to the tray shaft 8 and serves as a platform or receptacle for sample vessels to be shaken. For this purpose, the tray 9 can be equipped with a sample holder or have attachment options for Erlenmeyer flasks, test tubes or other ampoules. The tray 9 can be removed for cleaning purposes.

Die Tablarwelle 8 ist ausserdem fest mit einem Kopplungsstab 11 verbunden, wobei die Befestigung 13 des Kopplungsstabs 11 an der Tablarwelle 8 nicht drehbar ist. Der Kopplungsstab dient als Verbindungselement zu einer zweiten Tablarwelle 14. Die zweite Tablarwelle 14 ist in der zweiten Hohlwelle 18 exzentrisch gelagert, analog und mit der gleichen Exzentrizität wie in der Anordnung von Tablarwelle 8 und Hohlwelle 7. Auch die zweite Tablarwelle 14 ist am Kopplungsstab 11 verdrehsicher befestigt, sodass sowohl die Tablarwelle 8 als auch die zweite Tablarwelle 14 gegen Rotation gegenüber dem Rahmen 1 gesichert sind. Bevorzugt ist der Kopplungsstab 11 ein Blech, das an der Tablarwelle 8 und der zweiten Tablarwelle 14 angeschweisst ist.The tray shaft 8 is also firmly connected to a coupling rod 11, the attachment 13 of the coupling rod 11 on the tray shaft 8 not being rotatable. The coupling rod serves as a connecting element to a second tray shaft 14. The second tray shaft 14 is mounted eccentrically in the second hollow shaft 18, analogously and with the same eccentricity as in the arrangement of tray shaft 8 and hollow shaft 7. The second tray shaft 14 is also on the coupling rod 11 secured against rotation, so that both the tray shaft 8 and the second tray shaft 14 are secured against rotation relative to the frame 1. The coupling rod 11 is preferably a metal sheet that is welded to the tray shaft 8 and the second tray shaft 14 .

Die beiden Riemenscheiben 4 und 5 auf der Hohlwelle 7 und der zweiten Hohlwelle 18 laufen infolge des Antriebs durch den Zahnriemen 6 phasengleich. Dies führt dazu, dass sich die Tablarwelle 8 und das mit ihr verbundene Tablar 9 zwar gegen die Hohlwelle 7 verdrehen, aber ihre räumliche Ausrichtung gegenüber dem Rahmen 1 beibehalten, während sie eine kreisförmige Auslenkung durchlaufen.The two pulleys 4 and 5 on the hollow shaft 7 and the second hollow shaft 18 run in phase as a result of being driven by the toothed belt 6 . This means that the tray shaft 8 and the tray 9 connected to it rotate against the hollow shaft 7, but maintain their spatial orientation with respect to the frame 1 while undergoing circular deflection.

Die Verbindung des Kopplungsstabs 11 mit der zweiten Tablarwelle 14 ist idealerweise durch eine Blattfeder 12 hergestellt, die als elastisches Element Abstandsänderungen z.B. infolge von thermischer Ausdehnung oder ungenauer Fertigung ausgleichen kann.The connection of the coupling rod 11 to the second tray shaft 14 is ideally established by a leaf spring 12, which as an elastic element can compensate for changes in distance, e.g. as a result of thermal expansion or inaccurate manufacture.

Zwischen Tablar 9 und Rahmen 1 inklusive Antriebsmechanismus befindet sich eine Abdeckung 10, die fest mit dem Rahmen 1 verbunden und am Durchlass der Tablarwelle 8 abgedichtet ist. Die Abdeckung 10 schützt den Antriebsmechanismus vor Verschmutzung durch Festkörper und Flüssigkeiten, z.B. für den Fall, dass ein Probengefäss auf dem Tablar 9 umkippt und ausläuft oder Flüssigkeiten verspritzt werden. Die Abdeckung 10 ist bevorzugt als Wanne ausgestaltet, die an der Hohlwelle 7 gegen Festkörper und Flüssigkeiten abgedichtet ist. Innerhalb der Wanne befinden sich nur das Tablar 9, ein Teil der Tablarwelle 8 und die Proben in den Gefässen auf dem Tablar 9. Dadurch müssen bei Verschmutzung nur diese Elemente geputzt werden, während der Antriebsmechanismus, dessen Reinigung aufwändig wäre, sauber bleibt.There is a cover 10 between the tray 9 and the frame 1 including the drive mechanism, which is firmly connected to the frame 1 and sealed at the passage of the tray shaft 8 . The cover 10 protects the drive mechanism from contamination by solid bodies and liquids, e.g. in the event that a sample vessel on the tray 9 tips over and leaks or liquids are splashed. The cover 10 is preferably designed as a trough which is sealed against solids and liquids on the hollow shaft 7 . Only the tray 9, a part of the tray shaft 8 and the samples in the vessels on the tray 9 are located inside the trough. As a result, only these elements have to be cleaned when they are dirty, while the drive mechanism, which would be difficult to clean, remains clean.

An der Hohlwelle 7 ist ausserdem mindestens ein Gegengewicht 17 befestigt, das eine Unwucht ausgleicht, die durch die exzentrische Massenverteilung von Tablar 9, Probenhaltern, Proben und Tablarwelle 8 auftritt. Zusätzlich kann auch an der Tablarwelle 8 ein Gegengewicht angebracht sein, um eine dynamische Auswuchtung des Systems zu erreichen. Das Ausgleichen der Unwucht schont die Lager, vermindert Geräuschemissionen und verlängert die Lebensdauer des Antriebs.At least one counterweight 17 is also fastened to the hollow shaft 7 and compensates for an imbalance that occurs as a result of the eccentric mass distribution of the tray 9 , sample holders, samples and tray shaft 8 . In addition, a counterweight can also be attached to the tray shaft 8 in order to achieve dynamic balancing of the system. Compensating for the imbalance protects the bearings, reduces noise emissions and extends the service life of the drive.

Der beschriebene Aufbau des Schüttlers ermöglicht es, infolge des Antriebs hohe Schüttelfrequenzen von mehr als 1000 rpm und insbesondere von 1000 bis 1600 rpm oder mehr zu erreichen.The structure of the shaker described makes it possible to achieve high shaking frequencies of more than 1000 rpm and in particular from 1000 to 1600 rpm or more as a result of the drive.

Während in der vorliegenden Anmeldung bevorzugte Ausführungen der Erfindung beschrieben sind, ist zu beachten, dass die Erfindung nicht auf diese beschränkt ist und auch in anderer Weise innerhalb des Umfangs der folgenden Ansprüche ausgeführt werden kann.While the present application describes preferred embodiments of the invention, it should be understood that the invention is not limited thereto and may be otherwise embodied within the scope of the following claims.

Claims (12)

  1. Shaker comprising
    - a frame (1),
    - a tray (9) for holding one or more samples,
    - a drive for the tray (9), in which a tray shaft (8) is mounted eccentrically in a drivable hollow shaft (7),
    - a second hollow shaft (18) mounted on the frame (1),
    characterized by
    - a connecting element (11), which is fastened to the tray shaft (8) in a non-rotatable manner for securing the tray shaft (8) against rotation relative to the frame (1),
    - a second tray shaft (14), which is mounted eccentrically in the second hollow shaft (18) and is fastened to the connecting element (11) in a non-rotatable manner,
    wherein the tray shaft (8) is fixedly connected to the tray (9) and secured against rotation relative to the frame (1),
    wherein the second tray shaft (14) has the same eccentric position relative to the second hollow shaft (18) as the tray shaft (8) has relative to the hollow shaft (7).
  2. Shaker according to claim 1, comprising a cover (10) between the tray (9) and the drive.
  3. Shaker according to claim 2, wherein the cover (10) is sealed against the hollow shaft (7) to prevent contamination of the drive,
    in particular wherein the cover (10) comprises a trough.
  4. Shaker according to claim 2 or 3, wherein only the tray shaft (8) is located between the tray (9) and the cover (10).
  5. Shaker according to any of the preceding claims, wherein the connecting element (11) comprises a coupling rod.
  6. Shaker according to any of the preceding claims,
    wherein the connecting element (11) comprises an elastic element (12) for compensating distance changes between its two fastening points on the tray shaft (8) and the second tray shaft,
    in particular wherein the elastic element (12) is a spring, in particular a leaf spring.
  7. Shaker according to any of the preceding claims, wherein the hollow shaft (7) comprises a pulley (4) for drive via a toothed belt (6).
  8. Shaker according to claim 7, wherein another pulley (5) for drive by the toothed belt (6) is attached to the second hollow shaft (18).
  9. Shaker according to any of claims 1-6, comprising a gear transmission for driving the hollow shaft (7) and in particular also the second hollow shaft (18) .
  10. Shaker according to any of the preceding claims, comprising at least one counterweight (17) on the hollow shaft (7) for balancing an imbalance occurring due to eccentric mass distribution.
  11. Shaker according to any of the preceding claims, wherein the eccentricity of the tray shaft (8) with respect to the hollow shaft (7) is at most 25 mm and in particular 1.5 mm.
  12. Shaker according to any of the preceding claims, wherein a shaking frequency of the tray (9) due to the drive is at least 1000 rpm, in particular at least 1400 rpm.
EP17199729.9A 2017-11-02 2017-11-02 Shaker Active EP3479894B1 (en)

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EP17199729.9A EP3479894B1 (en) 2017-11-02 2017-11-02 Shaker
US16/177,521 US11253827B2 (en) 2017-11-02 2018-11-01 Shaker

Applications Claiming Priority (1)

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EP3479894B1 true EP3479894B1 (en) 2022-04-20

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111249974B (en) * 2020-03-31 2021-04-16 山东智方检测服务有限公司 Automatic it is fixed and have higher efficient sewage detection with shaking even equipment
US11808354B2 (en) 2021-03-11 2023-11-07 Sartorius Bioanalytical Instruments, Inc. Sample shaker system with sealed airflow
CN114192031B (en) * 2021-12-30 2023-11-24 青岛市胶州中心医院 Medical liquid medicine mixing device and use method thereof
WO2023165716A1 (en) 2022-03-04 2023-09-07 Infors Ag Device for agitating samples

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Publication number Priority date Publication date Assignee Title
US3481468A (en) * 1968-09-03 1969-12-02 Gilson Screen Co Gyratory and jarring sieve shake
GB1199840A (en) 1968-12-10 1970-07-22 New Brunswick Scientific Co Shaker Apparatus
US4202634A (en) * 1976-11-05 1980-05-13 Kraft Harold D Rack for vessels and means for agitating the vessels in the rack
US4125335A (en) 1977-02-03 1978-11-14 Blume Horst K Agitator system
US4134689A (en) 1977-05-05 1979-01-16 Svenska Skandex Ab Mixing apparatus
US4477434A (en) 1982-05-29 1984-10-16 Reiko Kosaka Medicinal compositions, foods and beverages having therapeutic effects on diseases of circulatory system and digestive system
CH656327A5 (en) 1982-06-05 1986-06-30 Infors Ag SHAKER.
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US5558437A (en) 1995-05-19 1996-09-24 Forma Scientific, Inc. Dynamically balanced orbital shaker
DE19814013C1 (en) * 1998-03-28 1999-07-22 Braun Biotech Int Gmbh Vibrator table for containers of fluid, mixing and increasing area for oxygen take-up
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ATE478726T1 (en) 2006-05-09 2010-09-15 Infors Ag SHAKER
DE102009043354A1 (en) 2009-09-29 2011-03-31 Infors Ag shaking

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US20190126221A1 (en) 2019-05-02

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