EP2447017B1 - Electric knife for cutting food - Google Patents

Electric knife for cutting food Download PDF

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Publication number
EP2447017B1
EP2447017B1 EP11185247.1A EP11185247A EP2447017B1 EP 2447017 B1 EP2447017 B1 EP 2447017B1 EP 11185247 A EP11185247 A EP 11185247A EP 2447017 B1 EP2447017 B1 EP 2447017B1
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EP
European Patent Office
Prior art keywords
electric knife
guide
knife
drive
electric
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EP11185247.1A
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German (de)
French (fr)
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EP2447017A1 (en
Inventor
Mihael Junkar
Danijel Kozlovic
Henri Orbanic
Toni Pogacar
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.)
BSH Hausgeraete GmbH
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BSH Bosch und Siemens Hausgeraete GmbH
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Priority to SI201130318T priority Critical patent/SI2447017T1/en
Publication of EP2447017A1 publication Critical patent/EP2447017A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
    • B26B7/00—Hand knives with reciprocating motor-driven blades
    • B26B7/005—Counter reciprocating blades

Definitions

  • the present invention relates to an electric knife for cutting food with a drive motor which reciprocates via a drive gear a first guide carriage, on which a knife blade is arranged.
  • the drive means usually comprises a disc with an eccentric pin, wherein the disc is driven by the axis of rotation of the electric motor.
  • the eccentric bolt converts via a suitable mechanism, the rotational movement of the drive shaft of the motor in a reciprocating motion of the knife blades of the electric knife.
  • cam gears which convert a rotational movement into a translatory movement.
  • Such a device is in the DE 37 07 658 A1 disclosed.
  • the device disclosed herein proposes the use of an eccentrically arranged ball on a disc which is rotated by a motor in a rotational movement. To achieve a reciprocation of the tool, the beats DE 37 07 658 A1 the use of a return spring before.
  • the GB 2 169 538 A also discloses an electric knife with a swash plate drive which converts a tumbling motion of a disc into a translational motion.
  • the invention has for its object to provide an electric knife, which ensures safe operation and further has a compact design.
  • the electric knife for cutting food has a drive motor which reciprocates via a drive gear a first guide carriage on which a knife blade is arranged. Further, a damping means is provided, which is designed in such a way to counteract the vibrations caused by the reciprocating movement of the knife blade.
  • the translational movement of the knife blade has a relatively high frequency, and thus generates disturbing vibrations of the electric knife, which can lead to unsafe operation for a user.
  • the damping means By the damping means, this translational movement can be compensated, and a user can safely record the operation of the electric knife.
  • the damping means is designed as an active agent which acts antiperiodisch according to the translational movement and the torque thus generated. Thus, almost all disturbing vibrations are balanced or compensated.
  • the active according to the invention Damping means is arranged to generate a corresponding counter-torque which compensates for the moment generated by the moving knife blade.
  • the damping means has a second guide carriage.
  • the second guide carriage generates a counter-torque which almost completely compensates for the translatory movement of the first guide carriage.
  • the second guide carriage can be designed mirror-symmetrically to the first carriage, which in turn leads to a compact design and efficient balancing. This ensures safe operation of the electric knife.
  • the second guide carriage is operatively connected to the drive gear.
  • the active connection between the drive gear and the second guide carriage thus ensures active damping for the electric knife.
  • both carriages are operatively connected to the same drive, the antiperiodic compensation of the moment can be effectively designed by the counter-torque.
  • the drive gear on a swash plate such that the swash plate is arranged at an angle on a drive shaft of the drive motor.
  • the swash plate provides a simple and cost-efficient way to convert the rotary motion into a translational motion.
  • the angle is preferably between 3 ° and 13 ° with respect to the drive shaft of the electric motor. More preferably, the diameter of the swash plate is about 25 mm, which has been found to be very effective for the translational movement.
  • a frequency and amplitude of the reciprocating motion can be realized, which can lead to very good cutting results.
  • the guide carriages each have a pair of running wheels which interact with the swashplate.
  • the wheels convert the wobble of the swash plate in a translational movement of the respective guide carriage.
  • the wheels each contact with the running surfaces of the swash plate, such that the wobbling movement of the swash plate is convertible into a translational movement of the guide carriage.
  • the running surfaces of the wheels are each in direct contact with the main surface of the swash plate, so that an effective transmission of the rotational movement and / or the tumbling motion of the disc can be ensured.
  • the wheels are mounted on the respective guide carriage in such a way that a measure of the translational movement is adjustable.
  • a measure of the translational movement is adjustable.
  • the blade blade axis and the drive shaft of the drive shaft coincide. This ensures a compact design of the electric knife.
  • the guide carriages are guided in a frame within a housing of the electric knife. This further improves the rigidity of the electric knife so that safe operation can be ensured. Furthermore, the entire drive gear can be made modular within the frame, which can lead to a simplified manufacture or assembly of the electric knife.
  • the frame has guide rails, on each of which the guide slides are guided.
  • the guide rails are easy to manufacture or Monatage and can accommodate the translational movement of the respective carriage safely within the housing.
  • Fig. 1 an electric knife according to the present invention
  • Fig. 2 an enlarged view of the drive range of the knife blade.
  • Fig. 1 schematically shows an electric knife 1 in a housing 9 according to the present invention.
  • the electric knife has an electric motor 2, which is fed by a set of accumulators (not shown), for example.
  • the motor 2 drives a drive shaft 11, which cooperates with a drive gear 5 of the blade blade 3 of the electric knife 1.
  • a swash plate 8 is arranged, which forms part of the drive gear 5 of the knife blade 3.
  • the swash plate 8 is arranged at a certain inclination angle ⁇ on the drive axle 11.
  • the swash plate 8 is in operative contact with two impeller pairs ie a first pair 12, 13 and a second pair 14, 15, which in turn are arranged on a guide carriage 4 and 7 respectively.
  • the wheels can be mounted by means of suitable bolts on the respective guide carriage, wherein it is also conceivable that the bolts have means which allow adjustment of the distance of the respective impeller to the axis of the respective guide slide 4, 7. Thus, the degree of translational movement of the respective guide carriage 4, 7 can be adjusted.
  • a knife blade 3 is attached at the lower guide carriage 4.
  • the knife blade 3 has a knife blade axis 17, which coincides with the axis of the drive shaft 11 of the electric motor 2 according to this preferred embodiment of the invention.
  • the guide carriages 4 and 7 both have an L-shaped shape so that the preferred axis arrangement, namely, so that the blade blade axis and drive axis coincide, can be realized.
  • Both guide slides 4 and 7 each have an impeller pair, which are in contact with the swash plate 8.
  • the running surfaces 16a, 16b of the respective impeller pairs are arranged on the outer edge of the swash plate.
  • the contact point, i. the impeller effective area on the surface of the swash plate 8 are adjusted accordingly.
  • the swash plate is arranged at an angle ⁇ on the drive shaft 11.
  • the motor 2 is operated at a frequency between 50 and 150 Hz and in the case of an electric knife 1 with only one knife blade 3 an amplitude of about 1 to 3 mm is needed.
  • the amplitude corresponds to the reciprocating movement of the lower guide carriage 4, namely the translational movement of the knife blade 3.
  • the swash plate 8 should be fixed at an angle of less than about 15 ° to the drive shaft 11 of the electric motor 2.
  • the swash plate has a diameter of 25 mm.
  • the swash plate should have an inclination angle between 5 ° and 13 ° degrees with respect to the drive axle 18.
  • a low-vibration device in particular a low-vibration electric knife
  • the electric knife according to the invention comprises a damping means 6, which is in particular also designed as a guide slide 7.
  • the guide carriage 7 is with reference to Fig. 1 shown above.
  • both guide carriages are arranged axisymmetrically to the drive axis or to the knife blade axis 17.
  • the electric knife 1 has a handle 19, which is arranged at the rear part of the housing 9. Preferably, the handle should be located in close proximity to the engine to ensure better handling of the device.
  • the knife blade 3 of the electric knife 1 thus forms a counterweight to the electric motor 2.
  • the entire drive gear 5 of the knife blade 3 can be arranged in a frame 20, which but with respect to Fig. 2 will be described in more detail below.
  • FIG. 2 shows an enlarged view of the drive gear 5 of the electric knife 1 according to the present invention.
  • the swash plate 8 has an inclination angle ⁇ with respect to the drive axle 18 and the drive shaft 11 on.
  • the gear 5 is arranged in a frame 20, which is designed in this preferred embodiment as a quadrangle.
  • the drive shaft 18 of the electric motor 2 can be performed, for example by means of a ball bearing through the frame.
  • the ball bearing is in the Fig. 2 or in the Fig. 1 not shown.
  • the knife blade holders are also guided out of the frame, so that the knife blade 3 can be fastened correspondingly to these holders.
  • the brackets are parallel to each other in this embodiment in a small distance.
  • the upper carriage 7 acts as a damping means 6 for the vibrations, which are caused in operation by the lower carriage 4 and by the knife blade 3.
  • the vibration of the electric knife 1 can be effectively reduced, which automatically leads to a safe operation of the device.
  • a user can safely use the electric knife 1 according to the present invention without risk of injury during operation.
  • the mounting bolts of the respective wheels 12, 13, 14 or 15 are formed such that the distance between the wheel axles to guide carriage 4 and 7 are stored adjustable by a user or a fitter in the production facility. It is also conceivable that the contact surface to the swash plate 8 of the lower wheels 12 and 13 is formed on the outer edge of the swash plate 8 and in contrast, the upper pairs of wheels closer to the drive axle, the swash plate 8 contact. Consequently, the lower slide 4 has a different amplitude in its translational movement 10 than the upper slide 7. As a result, both guide carriages should be anti-cyclic, i. be moved antiperiodisch, thus ensuring effective damping or vibration reduction during operation of the electric knife 1.
  • the guide carriages have suitable devices which are in operative contact with respective guide rails 21 and 22, so that the translational movement within the frame 20 can be effectively implemented.
  • the electric knife 1 only a knife blade 3. Due to the special design of the swash plate 8 and the inclination angle ⁇ , a very high frequency of the translational movement can be ensured, which makes it possible to effectively and quickly cut solid foods, such as meat or ham, for example.
  • the damping means 6 and the second guide carriage 7, the electric knife 1 can be very well balanced, which is perceived by a user as very comfortable and safe. Due to the L-shaped structure of the guide carriage 4 and 7, a compact running of the electric knife can be ensured in the housing.
  • the drive axis of the drive shaft 18 coincides with the blade blade axis 17 of the knife blade 3. This ensures a compact Structure of the electric knife 1 in a housing 9 and also an effective power transmission to the knife blade. 3

Description

Hintergrund der ErfindungBackground of the invention

Die vorliegende Erfindung betrifft ein Elektromesser zum Schneiden von Nahrungsmitteln mit einem Antriebsmotor, der über ein Antriebsgetriebe einen ersten Führungsschlitten, an welchem ein Messerblatt angeordnet ist, hin- und herbewegt.The present invention relates to an electric knife for cutting food with a drive motor which reciprocates via a drive gear a first guide carriage, on which a knife blade is arranged.

Stand der TechnikState of the art

Aus dem Stand der Technik sind Konstruktionen für Elektromesser bekannt, die einen elektrischen Motor und ein Antriebsmittel für die Messerklingen aufweisen. Das Antriebsmittel umfasst üblicherweise eine Scheibe mit einem Exzenterbolzen, wobei die Scheibe durch die Drehachse des elektrischen Motors angetrieben wird. Das Exzenterbolzen wandelt über eine geeignete Mechanik die Rotationsbewegung der Antriebsachse des Motors in eine Hin- und Herbewegung der Messerklingen des Elektromessers.From the prior art constructions for electric knives are known, which have an electric motor and a drive means for the knife blades. The drive means usually comprises a disc with an eccentric pin, wherein the disc is driven by the axis of rotation of the electric motor. The eccentric bolt converts via a suitable mechanism, the rotational movement of the drive shaft of the motor in a reciprocating motion of the knife blades of the electric knife.

Ebenfalls bekannt sind sogenannte Kurvengetriebe, welche eine Rotationsbewegung in eine translatorische Bewegung umwandeln. Eine solche Vorrichtung ist in der DE 37 07 658 A1 offenbart. Auch die hier offenbarte Vorrichtung schlägt den Einsatz einer exzentrisch angeordneten Kugel auf einer Scheibe, welche von einem Motor in einer Drehbewegung versetzt wird. Um eine Hin- und Herbewegung des Werkzeugs zu erreichen, schlägt die DE 37 07 658 A1 die Verwendung einer Rückholfeder vor.Also known are so-called cam gears, which convert a rotational movement into a translatory movement. Such a device is in the DE 37 07 658 A1 disclosed. Also, the device disclosed herein proposes the use of an eccentrically arranged ball on a disc which is rotated by a motor in a rotational movement. To achieve a reciprocation of the tool, the beats DE 37 07 658 A1 the use of a return spring before.

Die GB 2 169 538 A offenbart ebenfalls ein Elektromesser mit einem Taumelscheibenantrieb, welcher eine Taumelbewegung einer Scheibe in eine Translationsbewegung umwandelt.The GB 2 169 538 A also discloses an electric knife with a swash plate drive which converts a tumbling motion of a disc into a translational motion.

Die bekannten Vorrichtungen haben zwar einen relativ einfachen Aufbau jedoch ist der Einsatz von besonders starken Elektromotoren notwendig, um ein effizientes Schneiden zu gewährleisten. Üblicherweise sind Elektromesser akkubetrieben Geräte und zum Speisen dieser Motoren sind besonders starke Akkumulatoren notwendig, das sich negativ auf die Kosten des Elektromessers auswirkt. Auch eine kompakte Bauweise kann nicht immer gewährleistet werden. Ferner treten im Betrieb Vibrationen auf, die leicht zu einer Verletzung eines Benutzers des Elektromessers führen können.Although the known devices have a relatively simple structure, the use of particularly strong electric motors is necessary to achieve efficient cutting to ensure. Usually, electric knives are battery-operated devices and for feeding these motors are particularly strong accumulators necessary, which has a negative effect on the cost of the electric knife. Even a compact design can not always be guaranteed. Furthermore, vibrations occur during operation which can easily lead to injury to a user of the electric knife.

Der Erfindung zugrundeliegende AufgabeThe problem underlying the invention

Der Erfindung liegt die Aufgabe zugrunde, ein Elektromesser bereitzustellen, das einen sicheren Betrieb gewährleistet und weiter eine kompakte Bauweise aufweist.The invention has for its object to provide an electric knife, which ensures safe operation and further has a compact design.

Erfindungsgemäße LösungInventive solution

Die Lösung der gestellten Aufgabe gelingt durch ein Elektromesser zum Schneiden von Nahrungsmitteln mit den Merkmalen des Anspruchs 1.The solution of the problem is achieved by an electric knife for cutting food with the features of claim 1.

Vorteilhafte Aus- und Weiterbildungen, welche einzeln oder in Kombination miteinander eingesetzt werden können, sind Gegenstand der abhängigen Ansprüche.Advantageous embodiments and developments, which can be used individually or in combination with each other, are the subject of the dependent claims.

Das erfindungsgemäße Elektromesser zum Schneiden von Nahrungsmitteln weist einen Antriebsmotor auf, der über ein Antriebsgetriebe einen ersten Führungsschlitten, an welchem ein Messerblatt angeordnet ist, hin- und herbewegt. Weiter ist ein Dämpfungsmittel vorgesehen, das dergestalt ausgebildet ist, um den durch die Hin- und Herbewegung des Messerblatts bewirkten Vibrationen entgegenzuwirken.The electric knife for cutting food according to the invention has a drive motor which reciprocates via a drive gear a first guide carriage on which a knife blade is arranged. Further, a damping means is provided, which is designed in such a way to counteract the vibrations caused by the reciprocating movement of the knife blade.

Die Translationsbewegung bzw. die Hin- und Herbewegung des Messerblatts weist eine relativ hohe Frequenz auf, und erzeugt folglich störende Vibrationen des Elektromessers, welches zu einem unsicheren Betrieb für einen Benutzer führen kann. Durch das Dämpfungsmittel kann diese Translationsbewegung kompensiert werden, und ein Benutzer kann sicher den Betrieb des Elektromessers aufnehmen. Das Dämpfungsmittel ist als aktives Mittel ausgebildet, der entsprechend der Translationsbewegung und des somit erzeugten Momentes antiperiodisch wirkt. Somit werden annähernd alle störenden Vibrationen ausbalanciert bzw. kompensiert. Das erfindungsgemäße aktive Dämpfungsmittel ist eingerichtet um ein entsprechendes Gegenmoment zu erzeugen, welches das durch das bewegte Messerblatt erzeugte Moment kompensiert.The translational movement of the knife blade has a relatively high frequency, and thus generates disturbing vibrations of the electric knife, which can lead to unsafe operation for a user. By the damping means, this translational movement can be compensated, and a user can safely record the operation of the electric knife. The damping means is designed as an active agent which acts antiperiodisch according to the translational movement and the torque thus generated. Thus, almost all disturbing vibrations are balanced or compensated. The active according to the invention Damping means is arranged to generate a corresponding counter-torque which compensates for the moment generated by the moving knife blade.

Bevorzugte Ausgestaltung der ErfindungPreferred embodiment of the invention

Erfindungsgemäß weist das Dämpfungsmittel einen zweiten Führungsschlitten auf. Der zweite Führungsschlitten erzeugt im Betrieb ein Gegenmoment, das die Translationsbewegung des ersten Führungsschlittens nahezu komplett kompensiert. Der zweite Führungsschlitten kann spiegelsymmetrisch zum ersten Schlitten ausgebildet sein, welches wiederum zu einer kompakten Bauweise und eine effiziente Ausbalancierung führt. Somit wird ein sicherer Betrieb des Elektromessers gewährleistet.According to the invention, the damping means has a second guide carriage. During operation, the second guide carriage generates a counter-torque which almost completely compensates for the translatory movement of the first guide carriage. The second guide carriage can be designed mirror-symmetrically to the first carriage, which in turn leads to a compact design and efficient balancing. This ensures safe operation of the electric knife.

Es ist bevorzugt, dass das der zweite Führungsschlitten mit dem Antriebsgetriebe wirkverbunden ist. Durch die aktive Verbindung zwischen Antriebsgetriebe und zweitem Führungsschlitten wird folglich eine aktive Dämpfung für das Elektromesser gewährleistet. Dadurch, dass beide Schlitten mit demselben Antrieb wirkverbunden sind, kann die antiperiodische Kompensation des Moments durch das Gegenmoment effektiv gestaltet werden.It is preferred that the second guide carriage is operatively connected to the drive gear. The active connection between the drive gear and the second guide carriage thus ensures active damping for the electric knife. The fact that both carriages are operatively connected to the same drive, the antiperiodic compensation of the moment can be effectively designed by the counter-torque.

Erfindungsgemäß bevorzugt weist das Antriebsgetriebe eine Taumelscheibe auf, dergestalt dass die Taumelscheibe in einem Winkel auf einer Antriebswelle des Antriebsmotors angeordnet ist. Die Taumelscheibe stellt eine einfache und kosteneffiziente Möglichkeit zur Umwandlung der Rotationsbewegung in eine Translationsbewegung dar. Der Winkel beträgt bevorzugt zwischen 3° und 13° mit Bezug auf die Antriebswelle des Elektromotors. Weiter bevorzugt beträgt das Durchmesser der Taumelscheibe ca. 25 mm, welches sich als sehr effektiv für die Translationsbewegung herausgestellt hat. Somit kann eine Frequenz und Amplitude der Hin- und Herbewegung realisiert werden, das zu sehr guten Schnittergebnissen führen kann.Preferably according to the invention, the drive gear on a swash plate, such that the swash plate is arranged at an angle on a drive shaft of the drive motor. The swash plate provides a simple and cost-efficient way to convert the rotary motion into a translational motion. The angle is preferably between 3 ° and 13 ° with respect to the drive shaft of the electric motor. More preferably, the diameter of the swash plate is about 25 mm, which has been found to be very effective for the translational movement. Thus, a frequency and amplitude of the reciprocating motion can be realized, which can lead to very good cutting results.

Erfindungsgemäß weisen die Führungsschlitten jeweils ein Paar Laufräder auf, die mit der Taumelscheibe zusammenwirken. Die Laufräder wandeln die Taumelbewegung der Taumelscheibe in eine Translationsbewegung der jeweiligen Führungsschlitten um. Zweckmäßigerweise kontaktieren die Laufräder jeweils mit den Laufflächen die Taumelscheibe, dergestalt, dass die Taumelbewegung der Taumelscheibe in eine Translationsbewegung der Führungsschlitten umwandlbar ist. Die Laufflächen der Laufräder stehen jeweil im direkten Kontakt mit der Hauptfläche der Taumelscheibe, so dass eine effektive Übertragung der Rotationsbewegung und/oder der Taumelbewegung der Scheibe gewährleistet werden kann.According to the invention, the guide carriages each have a pair of running wheels which interact with the swashplate. The wheels convert the wobble of the swash plate in a translational movement of the respective guide carriage. Conveniently, the wheels each contact with the running surfaces of the swash plate, such that the wobbling movement of the swash plate is convertible into a translational movement of the guide carriage. The running surfaces of the wheels are each in direct contact with the main surface of the swash plate, so that an effective transmission of the rotational movement and / or the tumbling motion of the disc can be ensured.

Erfindungsgemäß sind die Laufräder dergestalt an den jeweiligen Führungsschlitten gelagert, dass ein Maß der Translationsbewegung einstellbar ist. Somit können unterschiedliche Amplituden der jeweiligen Schlitten durch einen Benutzer oder eine Wartungsperson eingestellt werden.According to the invention, the wheels are mounted on the respective guide carriage in such a way that a measure of the translational movement is adjustable. Thus, different amplitudes of the respective carriages can be adjusted by a user or a serviceman.

Es ist bevorzugt, dass die Messerblattachse und die Antriebsachse der Antriebswelle übereinstimmen. Dies gewährleistet einen kompakten Aufbau des Elektromessers.It is preferable that the blade blade axis and the drive shaft of the drive shaft coincide. This ensures a compact design of the electric knife.

Gemäß einer Ausführungsform sind die Führungsschlitten in einem Rahmen innerhalb eines Gehäuses des Elektromessers geführt. Dies verbessert weiter die Steifigkeit des Elektromessers, so dass ein sicherer Betrieb gewährleistet werden kann. Ferner kann das gesamte Antreibgetriebe innerhalb des Rahmens modular ausgeführt werden, welches zu einer vereinfachten Herstellung bzw. Montage des Elektromessers führen kann.According to one embodiment, the guide carriages are guided in a frame within a housing of the electric knife. This further improves the rigidity of the electric knife so that safe operation can be ensured. Furthermore, the entire drive gear can be made modular within the frame, which can lead to a simplified manufacture or assembly of the electric knife.

Der Rahmen weist Führungsschienen auf, auf welchen jeweils die Führungsschlitten geführt sind. Die Führungsschienen sind einfach in der Herstellung bzw. Monatage und können die Translationsbewegung der jeweiligen Führungsschlitten sicher innerhalb des Gehäuses aufnehmen.The frame has guide rails, on each of which the guide slides are guided. The guide rails are easy to manufacture or Monatage and can accommodate the translational movement of the respective carriage safely within the housing.

Kurzbeschreibung der ZeichnungBrief description of the drawing

Weitere vorteilhafte Ausgestaltungen werden nachfolgend an Hand eines in der Zeichnung dargestellten Ausführungsbeispieles, auf welches die Erfindung jedoch nicht beschränkt ist, näher beschrieben.Further advantageous embodiments will be described in more detail below with reference to an embodiment shown in the drawing, to which the invention is not limited.

Es zeigen schematisch: Fig. 1 ein Elektromesser gemäß der vorliegenden Erfindung; und Fig. 2 eine vergrößerte Darstellung des Antriebbereichs des Messerblatts. They show schematically: Fig. 1 an electric knife according to the present invention; and Fig. 2 an enlarged view of the drive range of the knife blade.

Ausführliche Beschreibung anhand eines AusführungsbeispielsDetailed description based on an embodiment

Bei der nachfolgenden Beschreibung der vorliegenden Erfindung bezeichnen gleiche Bezugszeichen gleiche oder vergleichbare Komponenten.In the following description of the present invention, like reference characters designate like or similar components.

Die in der vorstehenden Beschreibung, den Ansprüchen und den Zeichnungen offenbarten Merkmale können sowohl einzeln als auch in beliebiger Kombination für die Verwirklichung der Erfindung in ihren verschiedenen Ausgestaltungen von Bedeutung sein.The features disclosed in the foregoing description, the claims and the drawings may be of importance both individually and in any combination for the realization of the invention in its various forms.

Fig. 1 zeigt schematisch ein Elektromesser 1 in einem Gehäuse 9 gemäß der vorliegenden Erfindung. Das Elektromesser weist einen Elektromotor 2 auf, der beispielsweise von einem Satz Akkumulatoren (nicht gezeigt) gespeist wird. Der Motor 2 treibt eine Antriebswelle 11 an, die mit einem Antriebsgetriebe 5 des Messerblatts 3 des Elektromessers 1 zusammenwirkt. Fig. 1 schematically shows an electric knife 1 in a housing 9 according to the present invention. The electric knife has an electric motor 2, which is fed by a set of accumulators (not shown), for example. The motor 2 drives a drive shaft 11, which cooperates with a drive gear 5 of the blade blade 3 of the electric knife 1.

An der Antriebswelle 11 des Elektromotors 2 ist eine Taumelscheibe 8 angeordnet, welche ein Teil des Antriebsgetriebes 5 des Messerblatts 3 bildet. Die Taumelscheibe 8 ist in einem bestimmten Neigungswinkel α an der Antriebsachse 11 angeordnet. Durch diese besondere Anordnung kann die Rotationsbewegung der Drehachse 18 der Antriebswelle 11 in eine Translationsbewegung umgewandelt werden.On the drive shaft 11 of the electric motor 2, a swash plate 8 is arranged, which forms part of the drive gear 5 of the knife blade 3. The swash plate 8 is arranged at a certain inclination angle α on the drive axle 11. By this particular arrangement, the rotational movement of the axis of rotation 18 of the drive shaft 11 can be converted into a translational movement.

Die Taumelscheibe 8 steht im Wirkkontakt mit zwei Laufradpaaren d.h. einem ersten Paar 12, 13 und einem zweiten Paar 14, 15, welche wiederum an jeweils einem Führungsschlitten 4 bzw. 7 angeordnet sind. Die Laufräder können mittels geeignete Bolzen an den jeweiligen Führungsschlitten montiert werden, wobei auch vorstellbar ist, dass die Bolzen Mittel aufweisen, welche eine Einstellung des Abstands des jeweiligen Laufrades zur Achse der jeweiligen Führungsschlitten 4, 7 ermöglichen. Somit kann das Maß der Translationsbewegung der jeweiligen Führungsschlitten 4, 7 eingestellt werden.The swash plate 8 is in operative contact with two impeller pairs ie a first pair 12, 13 and a second pair 14, 15, which in turn are arranged on a guide carriage 4 and 7 respectively. The wheels can be mounted by means of suitable bolts on the respective guide carriage, wherein it is also conceivable that the bolts have means which allow adjustment of the distance of the respective impeller to the axis of the respective guide slide 4, 7. Thus, the degree of translational movement of the respective guide carriage 4, 7 can be adjusted.

An dem unteren Führungsschlitten 4 ist ein Messerblatt 3 befestigt. Das Messerblatt 3 weist eine Messerblattachse 17 auf, welche gemäß dieser bevorzugten Ausführungsform der Erfindung mit der Achse der Antriebswelle 11 des Elektromotors 2 zusammenfällt. Die Führungsschlitten 4 und 7 weisen beide eine L-förmige Gestalt bzw. Form auf, so dass die bevorzugte Achsenanordnung, nämlich so dass Messerblattachse und Antriebsachse zusammenfallen bzw. übereinstimmen, realisiert werden kann.At the lower guide carriage 4, a knife blade 3 is attached. The knife blade 3 has a knife blade axis 17, which coincides with the axis of the drive shaft 11 of the electric motor 2 according to this preferred embodiment of the invention. The guide carriages 4 and 7 both have an L-shaped shape so that the preferred axis arrangement, namely, so that the blade blade axis and drive axis coincide, can be realized.

Beide Führungsschlitten 4 und 7 weisen jeweils ein Laufradpaar auf, welche mit der Taumelscheibe 8 in Kontakt stehen. Gemäß dieser Ausführungsform sind die Laufflächen 16a, 16b der jeweiligen Laufradpaare am Außenrand der Taumelscheibe angeordnet. Durch die mögliche Ausgestaltung der Montagebolzen der Laufräder kann jedoch der Kontaktpunkt, d.h. die Laufradwirkfläche auf der Fläche der Taumelscheibe 8 entsprechend eingestellt werden.Both guide slides 4 and 7 each have an impeller pair, which are in contact with the swash plate 8. According to this embodiment, the running surfaces 16a, 16b of the respective impeller pairs are arranged on the outer edge of the swash plate. However, due to the possible design of the mounting bolts of the wheels, the contact point, i. the impeller effective area on the surface of the swash plate 8 are adjusted accordingly.

Die Taumelscheibe ist in einem Winkel α an der Antriebswelle 11 angeordnet. Der Motor 2 wird mit einer Frequenz zwischen 50 und 150 Hz betrieben und im Falle eines Elektromessers 1 mit nur einem Messerblatt 3 wird eine Amplitude von ca. 1 bis 3 mm benötigt. Die Amplitude entspricht der Hin- und Herbewegung des unteren Führungsschlittens 4, nämlich der Translationsbewegung des Messerblatts 3. Demgemäß sollte die Taumelscheibe 8 in einem Winkel kleiner ca. 15° an der Antriebswelle 11 des Elektromotors 2 fixiert werden. Gemäß dieser Ausführungsform weist die Taumelscheibe einen Durchmesser von 25 mm auf. Um die gewünschte Translationsbewegung zwischen einem und drei Millimeter zu realisieren, bevorzugt sollte die Taumelscheibe einen Neigungswinkel zwischen 5° und 13° Grad bezüglich der Antriebsachse 18 aufweisen. Diese Beziehung ergibt sich aus dem mathematischen Zusammenhang, nämlich Amplitude = (D / 2) x tan(a). Gemäß dieser bevorzugten Ausführungsform kann eine vibrationsarme Vorrichtung insbesondere ein vibrationsarmes Elektromesser bereitgestellt werden. Um weiter die Vibrationen zu reduzieren, weist das erfindungsgemäße Elektromesser ein Dämpfungsmittel 6 auf, welches insbesondere ebenfalls als Führungsschlitten 7 ausgebildet ist. Der Führungsschlitten 7 ist mit Bezug auf Fig. 1 oben dargestellt. Gemäß dieser Ausführungsform sind beide Führungsschlitten achsensymmetrisch zur Antriebsachse bzw. zur Messerblattachse 17 angeordnet. Durch den symmetrischen Aufbau kann eine effektive Vibrationsreduzierung im Betrieb des Elektromessers 1 realisiert werden.The swash plate is arranged at an angle α on the drive shaft 11. The motor 2 is operated at a frequency between 50 and 150 Hz and in the case of an electric knife 1 with only one knife blade 3 an amplitude of about 1 to 3 mm is needed. The amplitude corresponds to the reciprocating movement of the lower guide carriage 4, namely the translational movement of the knife blade 3. Accordingly, the swash plate 8 should be fixed at an angle of less than about 15 ° to the drive shaft 11 of the electric motor 2. According to this embodiment, the swash plate has a diameter of 25 mm. In order to realize the desired translational movement between one and three millimeters, preferably, the swash plate should have an inclination angle between 5 ° and 13 ° degrees with respect to the drive axle 18. This relationship results from the mathematical relationship, namely amplitude = (D / 2) x tan (a). According to this preferred embodiment, a low-vibration device, in particular a low-vibration electric knife can be provided. In order to further reduce the vibrations, the electric knife according to the invention comprises a damping means 6, which is in particular also designed as a guide slide 7. The guide carriage 7 is with reference to Fig. 1 shown above. According to this embodiment, both guide carriages are arranged axisymmetrically to the drive axis or to the knife blade axis 17. By the symmetrical structure, an effective vibration reduction during operation of the electric knife 1 can be realized.

Durch den symmetrischen Aufbau der Führungsschlitten 4 und 7 kann erfindungsgemäß beispielsweise noch ein weiteres Messerblatt an dem zweiten Führungsschlitten 7 angeordnet werden. Durch das zweite Messerblatt kann die gesamte Vorrichtung 1 noch besser ausbalanciert werden, welches wiederum zu einer noch effektiveren Vibrationsreduzierung führen kann. Alle Funktionsbauteile des Elektromessers 1, nämlich Antriebsmotor, die jeweiligen Führungsschlitten 4 und 7, das Antriebsgetriebe und das Dämpfungsmittel 6 sind innerhalb eines Gehäuses 9, welches schematisch in der Figur 1 dargestellt worden ist, angeordnet.Due to the symmetrical construction of the guide carriages 4 and 7, according to the invention, for example, still another knife blade can be arranged on the second guide carriage 7. By the second knife blade, the entire device 1 can be even better balanced, which in turn can lead to an even more effective vibration reduction. All functional components of the electric knife 1, namely drive motor, the respective guide slide 4 and 7, the drive gear and the damping means 6 are within a housing 9, which schematically in the FIG. 1 has been shown arranged.

Zur Bedienung weist das Elektromesser 1 einen Griff 19 auf, welches am hinteren Teil des Gehäuses 9 angeordnet ist. Bevorzugt soll der Griff in unmittelbarer Nähe zum Motor angeordnet sein, um eine bessere Handhabbarkeit der Vorrichtung zu gewährleisten. Das Messerblatt 3 des Elektromessers 1 bildet somit ein Gegengewicht zum Elektromotor 2. Das gesamte Antriebsgetriebe 5 des Messerblatts 3 kann in einem Rahmen 20 angeordnet werden, welches aber mit Bezug auf Fig. 2 im Folgenden genauer beschrieben wird.For operation, the electric knife 1 has a handle 19, which is arranged at the rear part of the housing 9. Preferably, the handle should be located in close proximity to the engine to ensure better handling of the device. The knife blade 3 of the electric knife 1 thus forms a counterweight to the electric motor 2. The entire drive gear 5 of the knife blade 3 can be arranged in a frame 20, which but with respect to Fig. 2 will be described in more detail below.

Figur 2 zeigt eine vergrößerte Darstellung des Antriebsgetriebes 5 des Elektromessers 1 gemäß der vorliegenden Erfindung. Wie aus der Fig. 2 ersichtlich ist, weist die Taumelscheibe 8 einen Neigungswinkel α bezüglich der Antriebsachse 18 bzw. der Antriebswelle 11 auf. Wie bereits erwähnt, ist das Getriebe 5 in einem Rahmen 20 angeordnet, der in diesem bevorzugten Ausführungsbeispiel als Viereck ausgeführt ist. FIG. 2 shows an enlarged view of the drive gear 5 of the electric knife 1 according to the present invention. Like from the Fig. 2 can be seen, the swash plate 8 has an inclination angle α with respect to the drive axle 18 and the drive shaft 11 on. As already mentioned, the gear 5 is arranged in a frame 20, which is designed in this preferred embodiment as a quadrangle.

Die Antriebswelle 18 des Elektromotors 2 kann beispielsweise mittels eines Kugellagers durch den Rahmen geführt werden. Aus Gründen der Einfachheit ist das Kugellager in der Fig. 2 bzw. in der Fig. 1 nicht dargestellt. Auch die Messerblatthalterungen werden aus dem Rahmen hinaus geführt, so dass das Messerblatt 3 entsprechend an diesen Halterungen befestigt werden kann. Die Halterungen verlaufen in dieser Ausführungsform parallel in einem geringen Abstand zueinander. Durch die Taumelscheibe 8 und der symmetrisch angeordneten Führungsschlitten 4 und 7 kann somit eine Hin- und Herbewegung 10 des Messerblatts gewährleistet werden. Die Taumelscheibe 8 und die jeweiligen Laufradpaare bewirken, dass beide Führungsschlitten 4 und 7 antizyklisch und (anti-)periodisch bewegt. Somit wirkt der obere Schlitten 7 als Dämpfungsmittel 6 für die Vibrationen, welche im Betrieb durch den unteren Schlitten 4 bzw. durch das Messerblatt 3 verursacht werden. Dadurch, dass beide Schlitten symmetrisch aufgebaut sind, kann effektiv die Vibration des Elektromessers 1 reduziert werden, was automatisch zu einem sicheren Betrieb der Vorrichtung führt. Somit kann ein Benutzer das Elektromesser 1 gemäß der vorliegenden Erfindung sicher verwenden, ohne dass Verletzungsgefahr im laufenden Betrieb entstehen kann.The drive shaft 18 of the electric motor 2 can be performed, for example by means of a ball bearing through the frame. For the sake of simplicity, the ball bearing is in the Fig. 2 or in the Fig. 1 not shown. The knife blade holders are also guided out of the frame, so that the knife blade 3 can be fastened correspondingly to these holders. The brackets are parallel to each other in this embodiment in a small distance. By the swash plate 8 and the symmetrically arranged guide carriage 4 and 7 thus a reciprocating motion 10 of the knife blade can be ensured. The swash plate 8 and the cause respective impeller pairs that both guide slides 4 and 7 anticyclically and (anti-) moved periodically. Thus, the upper carriage 7 acts as a damping means 6 for the vibrations, which are caused in operation by the lower carriage 4 and by the knife blade 3. The fact that both carriages are symmetrical, the vibration of the electric knife 1 can be effectively reduced, which automatically leads to a safe operation of the device. Thus, a user can safely use the electric knife 1 according to the present invention without risk of injury during operation.

Es ist denkbar, dass die Montagebolzen der jeweiligen Laufräder 12, 13, 14 oder 15 dergestalt ausgebildet sind, dass der Abstand der Laufradachsen zum Führungsschlitten 4 bzw. 7 durch einen Benutzer oder einen Monteur in der Produktionsstätte einstellbar gelagert sind. Auch denkbar ist, dass die Kontaktfläche zur Taumelscheibe 8 der unteren Laufräder 12 und 13 am Außenrand der Taumelscheibe 8 gebildet wird und im Gegensatz dazu können die oberen Laufradpaare näher an der Antriebsachse die Taumelscheibe 8 kontaktieren. Folglich weist der untere Schlitten 4 eine andere Amplitude in seiner Translationsbewegung 10 als der obere Schlitten 7 auf. Hierdurch sollten beide Führungsschlitten antizyklisch, d.h. antiperiodisch bewegt werden, um somit eine effektive Dämpfung bzw. Vibrationsreduzierung im Betrieb des Elektromessers 1 zu gewährleisten. Die Führungsschlitten weisen geeignete Vorrichtungen auf, welche mit jeweiligen Führungsschienen 21 und 22 in Wirkkontakt stehen, so dass die Translationsbewegung innerhalb des Rahmens 20 effektiv umgesetzt werden kann.It is conceivable that the mounting bolts of the respective wheels 12, 13, 14 or 15 are formed such that the distance between the wheel axles to guide carriage 4 and 7 are stored adjustable by a user or a fitter in the production facility. It is also conceivable that the contact surface to the swash plate 8 of the lower wheels 12 and 13 is formed on the outer edge of the swash plate 8 and in contrast, the upper pairs of wheels closer to the drive axle, the swash plate 8 contact. Consequently, the lower slide 4 has a different amplitude in its translational movement 10 than the upper slide 7. As a result, both guide carriages should be anti-cyclic, i. be moved antiperiodisch, thus ensuring effective damping or vibration reduction during operation of the electric knife 1. The guide carriages have suitable devices which are in operative contact with respective guide rails 21 and 22, so that the translational movement within the frame 20 can be effectively implemented.

Gemäß einer bevorzugten Ausführungsform weist das Elektromesser 1 nur ein Messerblatt 3 auf. Durch die besondere Ausgestaltung der Taumelscheibe 8 und dem Neigungswinkel α kann eine sehr hohe Frequenz der Translationsbewegung gewährleistet werden, welches es ermöglicht, dass effektiv und schnell feste Lebensmittel, wie beispielsweise Fleisch oder Schinken, geschnitten werden können. Durch das Dämpfungsmittel 6 bzw. den zweiten Führungschlitten 7 kann das Elektromesser 1 sehr gut ausbalanciert werden, welches von einem Benutzer als sehr angenehm und sicher empfunden wird. Durch den L-förmigen Aufbau der Führungsschlitten 4 und 7 kann eine kompakte Laufweise des Elektromessers in dem Gehäuse gewährleistet werden. Die Antriebsachse der Antriebswelle 18 stimmt mit der Messerblattachse 17 des Messerblatts 3 überein. Dies gewährleistet einen kompakten Aufbau des Elektromessers 1 in einem Gehäuse 9 und auch eine effektive Kraftübertragung auf das Messerblatt 3.According to a preferred embodiment, the electric knife 1 only a knife blade 3. Due to the special design of the swash plate 8 and the inclination angle α, a very high frequency of the translational movement can be ensured, which makes it possible to effectively and quickly cut solid foods, such as meat or ham, for example. By the damping means 6 and the second guide carriage 7, the electric knife 1 can be very well balanced, which is perceived by a user as very comfortable and safe. Due to the L-shaped structure of the guide carriage 4 and 7, a compact running of the electric knife can be ensured in the housing. The drive axis of the drive shaft 18 coincides with the blade blade axis 17 of the knife blade 3. This ensures a compact Structure of the electric knife 1 in a housing 9 and also an effective power transmission to the knife blade. 3

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Elektromesserelectric knife
22
Antriebsmotor bzw. ElektromotorDrive motor or electric motor
33
Messerblattknife blade
44
erster Führungsschlittenfirst guide carriage
55
Antriebsgetriebedrive gear
66
Dämpfungsmitteldamping means
77
zweiter Führungsschlittensecond guide carriage
88th
Taumelscheibeswash plate
99
Gehäusecasing
1010
Hin- und Herbewegung des MesserblattsFloat of the knife blade
1111
Antriebswelle des ElektromotorsDrive shaft of the electric motor
1212
erstes Laufradfirst impeller
1313
zweites Laufradsecond impeller
1414
drittes Laufradthird wheel
1515
viertes Laufradfourth wheel
16a16a
erste Laufflächefirst tread
16b16b
zweite Laufflächesecond tread
1717
MesserblattachseKnife blade axis
1818
Antriebsachse der AntriebswelleDrive shaft of the drive shaft
1919
Handgriffhandle
2020
Rahmen bzw. Führungsrahmen innerhalb des GehäusesFrame or guide frame within the housing
2121
erste Führungsschienefirst guide rail
2222
zweite Führungsschienesecond guide rail

Claims (6)

  1. Electric knife (1) for cutting food having a drive motor (2), which moves a first guide carriage (4) back and forth via a drive gear (5), on which guide carriage (4) a knife blade (3) is arranged, wherein a damping means (6) is provided, which is embodied in such a way as to counter the vibrations caused by the back and forth movement (10) of the knife blade (3),
    the drive gear having a wobble plate (8), such that the wobble plate (8) is arranged at an angle (α) to a drive shaft (11) of the drive motor,
    the damping means (6) having a second guide carriage (7),
    the guide carriages (4, 7) each having a pair of running wheels (12, 13, 14, 15), which interact with the wobble plate (8),
    the running wheels (12, 13, 14, 15) each coming into contact with the wobble plate (8) via running surfaces (16a, 16b) such that the wobble movement of the wobble plate can be converted into a translatory movement of the guide carriages (4, 7),
    characterised in that the running wheels (12, 13, 14, 15) are mounted on the respective guide carriages (4, 7) in such a way that the amount of the translatory movement can be adjusted.
  2. Electric knife (1) according to claim 1, characterised in that the second guide carriage (7) is actively connected to the drive gear (5).
  3. Electric knife (1) according to at least any one of the preceding claims, characterised in that the knife blade axis (17) corresponds with the drive axis (18) of the drive shaft (11).
  4. Electric knife (1) according to at least any one of the preceding claims, characterised in that the guide carriages (4, 7) are guided in a frame (20) within a housing (9) of the electric knife (1).
  5. Electric knife (1) according to claim 4, characterised in that the frame (20) has guide rails (21, 22) on which the guide carriages (4, 7) are guided in each case.
  6. Electric knife (1) as claimed in claim 5, characterised in that the guide rails (21, 22) run parallel to the drive axis (18).
EP11185247.1A 2010-10-29 2011-10-14 Electric knife for cutting food Active EP2447017B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI201130318T SI2447017T1 (en) 2010-10-29 2011-10-14 Electric knife for cutting food

Applications Claiming Priority (1)

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DE201010043148 DE102010043148A1 (en) 2010-10-29 2010-10-29 Electric knife for cutting food

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EP2447017A1 EP2447017A1 (en) 2012-05-02
EP2447017B1 true EP2447017B1 (en) 2014-08-27

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DE (1) DE102010043148A1 (en)
ES (1) ES2505543T3 (en)
SI (1) SI2447017T1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106142146A (en) * 2016-08-30 2016-11-23 阳江拓必拓科技股份有限公司 Protected against splashing water kitchen knife

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106393188A (en) * 2016-10-27 2017-02-15 黎柏麟 Multifunctional knife

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Publication number Priority date Publication date Assignee Title
US2168703A (en) * 1936-06-10 1939-08-08 Ind Patents Corp Skinning knife
US3367026A (en) * 1965-07-22 1968-02-06 Levine Sol Power operated knife with reciprocating slicing blade and electric motor located remotely of the blade
US3337952A (en) * 1966-09-07 1967-08-29 Mel S Rosen Knife with reciprocating blades
GB1277869A (en) * 1969-12-23 1972-06-14 Schmid & Wezel Improvements in manually-guided power-driven knives
US4631827A (en) * 1985-01-09 1986-12-30 Black & Decker, Inc. Electric knife drive mechanism
US4644653A (en) * 1985-07-30 1987-02-24 Bacon Donald V Reciprocating knife
DE3707658A1 (en) 1987-03-10 1988-09-22 Norbert Friebe Rotary to reciprocating drive conversion - involves eccentrically rotating spherical surface in contact with reciprocating spherical drive
US5025562A (en) * 1990-03-01 1991-06-25 Milwaukee Electric Tool Corporation Counterbalanced reciprocating mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106142146A (en) * 2016-08-30 2016-11-23 阳江拓必拓科技股份有限公司 Protected against splashing water kitchen knife
CN106142146B (en) * 2016-08-30 2018-02-06 阳江拓必拓科技股份有限公司 Protected against splashing water kitchen knife

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EP2447017A1 (en) 2012-05-02
ES2505543T3 (en) 2014-10-10
DE102010043148A1 (en) 2012-05-03

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