EP2846667A1 - Mixeur - Google Patents

Mixeur

Info

Publication number
EP2846667A1
EP2846667A1 EP13721662.8A EP13721662A EP2846667A1 EP 2846667 A1 EP2846667 A1 EP 2846667A1 EP 13721662 A EP13721662 A EP 13721662A EP 2846667 A1 EP2846667 A1 EP 2846667A1
Authority
EP
European Patent Office
Prior art keywords
blade
kitchen appliance
pair
drive
knife
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.)
Withdrawn
Application number
EP13721662.8A
Other languages
German (de)
English (en)
Inventor
Bostjan KOVACEC
Jurij Pesec
Roman Sabec
Jozef Skoncnik
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
Original Assignee
BSH Bosch und Siemens Hausgeraete GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP2846667A1 publication Critical patent/EP2846667A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J43/00—Implements for preparing or holding food, not provided for in other groups of this subclass
    • A47J43/04—Machines for domestic use not covered elsewhere, e.g. for grinding, mixing, stirring, kneading, emulsifying, whipping or beating foodstuffs, e.g. power-driven
    • A47J43/07—Parts or details, e.g. mixing tools, whipping tools
    • A47J43/0716—Parts or details, e.g. mixing tools, whipping tools for machines with tools driven from the lower side
    • A47J43/0722—Mixing, whipping or cutting tools

Definitions

  • the invention relates to an electromotive operated kitchen appliance for comminuting food with a drive unit that can drive a blade set at a speed of more than 1000 revolutions per minute (rpm) about a rotation axis, the blade set an upper, in a first radial plane extending blade portion and a lower, in a second, extending from the first radial plane in the direction of the axis of rotation radial plane extending knife edge.
  • rpm revolutions per minute
  • Electric motor driven kitchen appliances for mincing food such as food processors, crushers or blenders, are well known.
  • kitchen utensils are used for chopping, for example, hard foods, such as nuts, or chopping herbs.
  • the blades are offset by a shaft in rapid rotation of typically 7000 to 22000 revolutions per minute, two knives extending from the shaft each side radially and are arranged at different heights with respect to this shaft , The blades extend in mutually opposite radial direction. During rotation, however, they cause a dynamic imbalance, which is absorbed by bearings of the shaft.
  • the patent DE 1066716 B1 discloses a blade set for an electromotive operated kitchen appliance for comminution, mixing and stirring, which is composed of several blade pairs.
  • a wing of a pair of knives extends in this case in its foot part away from the axis of rotation and is angled in its central region in a direction with its free end towards the axis of rotation inward direction, while the other wing has a direction away from the wing angle.
  • US 2005/0167537 A1 proposes fitting the surfaces of the knife set of the kitchen appliance with incisors in order to enable improved processing of the food. It is a knife set of two shown on different radial planes of a shaft extending pairs of knives, each knife pair is disclosed point-symmetrical ,.
  • the patent US 2788038 A discloses a arranged in a blender container simple plate at the edge of a first pair radially réelleckende upwards Angled cutting blades and a second pair are radiallyinstituckende downwardly angled cutting blades are formed.
  • the invention is therefore based on the object to provide an electric motor driven kitchen appliance available, which allows a longer operating time.
  • the object underlying the invention is achieved in an electromotive kitchen appliance of the type mentioned above in that the knife set is designed so that it has no dynamic imbalance with respect to the axis of rotation.
  • the inventors have found in his investigation of ordinary high speed food processor kitchen machines that already after a short period of operation, the bearings of the drive shaft, on which the knife set is arranged elevated temperature, so that the operating time of the kitchen appliances, for example, for crushing eg maximum 30 seconds must be limited to prevent the bearings are permanently damaged due to the increased temperature.
  • the inventors have further recognized that this disadvantage can be overcome by the fact that the blade set is designed such that a blade set essentially without dynamic imbalance, preferably substantially without static imbalance is used.
  • a dynamic imbalance is missing according to the invention when the axis of rotation of the knife set runs parallel to a main axis of inertia knife set.
  • a static unbalance is missing when the axis of rotation of the knife set passes through the center of gravity of the knife set. If both the dynamic and the static imbalance are missing, the axis of rotation coincides with a principal axis of inertia of the set of blades. It is an achievable advantage of the invention that the bearings are less heavily loaded and thereby become less hot. As a result, the operating time can be advantageously increased. Furthermore, vibrations caused by unbalance can be at least partially prevented. This can advantageously reduce the operating noise of the kitchen appliance.
  • Preferred kitchen utensils are those for chopping food, e.g. Vegetables, nuts or meat.
  • a particularly preferred kitchen appliance is a universal shredder.
  • the invention also encompasses kitchen utensils having more than two, e.g. has three or four blade sections.
  • at least one, preferably each, knife portion of the knife set has a plurality of knife wings each extending radially from the axis of rotation.
  • the preferred blade wings of a blade section are rotationally symmetric with respect to the axis of rotation, i. there is at least an integer fraction of 360 °, e.g. 180 °, 120 ° or 90 °, around which the blade portion can be rotated to bring the blade wings of this blade portion coincide. This makes it easy to avoid an imbalance in this knife section.
  • Each blade section preferably has two blade wings, but also designs with more than two, e.g. comprises three or four blade wings of the invention.
  • the knife set is offset by means of a drive shaft of the drive unit in rotation. It is preferred that several, particularly preferably all knife sections together to one of the drive unit in rotation displaceable Drive shaft are connected.
  • the blade wings are arranged at least one blade section on a substantially parallel to the drive shaft connecting piece.
  • the preferred connector extends from the radial plane of the first blade section to the plane of the second blade section.
  • a preferred kitchen appliance comprises a container for receiving, preferably for comminuting, the food.
  • the knife set is preferably arranged inside the container.
  • the drive shaft is preferably at least partially disposed within the container. It may, for example, extend vertically from a bottom or lid of the container to a coupling device of the drive unit.
  • the drive shaft protrudes only in the container from above or below, and the knife set can be arranged at the free end of the drive shaft within the container, while the other end of the drive shaft is connected to the coupling device of the drive unit.
  • the first and second blade pairs of the blade set are each aligned parallel to the bottom of the container.
  • the knife set may have a knife geometry, which allow the use in both the one and in the other direction of rotation, depending on the selected direction of rotation another function can be selected.
  • the first blade pair and / or the second blade pair are formed with two-sided cutting.
  • the clockwise direction of rotation of the knife set cutting or crushing of the food in the container can be done while, for example, the rotation in the opposite direction, for example, for grinding or pulverizing food can be used.
  • the distance between the first blade pair and the second blade pair of the blade set is 20 mm or less.
  • the distance between the first blade pair and the second blade pair of the blade set is preferably 1 mm or more, particularly preferably 3 mm or more, particularly preferably 8 mm or more.
  • the distance between the first blade pair and the second blade pair of the blade set is 15 mm or less, especially preferably 10 mm or less.
  • the distance between the pairs of blade wings, the processing of the food, such as crushing can be further improved because the food can be processed at different heights in the container.
  • the knife blade pairs of the knife set may be embedded in an injection molded part or cohesively, for example, by gluing, welding, soldering, or be positively connected to each other, for example by riveting.
  • the blade set of the kitchen appliance can be produced in one piece. Due to the one-piece production method, the manufacture and further processing of the knife set can be simplified, whereby working time and manufacturing costs can be saved.
  • the set of knives is designed as a single plate formed into a set of knives.
  • the manufacture of the knife set can for example be done as follows: From a provided sheet, such as a stainless steel sheet, a one-piece plate is cut out as a blank, the blank already includes the first and second blade pair.
  • the term sheet describes here a flat rolling mill finished product made of metal, which is delivered as a panel. Almost every metal can be processed into sheet metal. As a rule, a sheet has a thickness of more than 60 ⁇ m.
  • the term blank describes a workpiece that is used in the processing chain for a further processing step, but has already been processed from the starting material.
  • the separation of the blank from the sheet can in principle be carried out by any suitable method, for example by erosion, laser cutting or water jet cutting.
  • the knife set is usually manufactured in large numbers, so that the separation is advantageously carried out by punching. Subsequently, the blank is formed into the shape of the knife set. In this case, the connecting pieces, which connects the second pair of blade wings with the first pair of blade wings, bent vertically downwards. Thereafter, the blade wings of the second blade pair can be bent so that the second blade pair is aligned horizontally.
  • any method suitable for this purpose can be used for forming, for example, draw-forming, draw-forming or bending-forming.
  • the knife set is Usually manufactured in large quantities, so that the forming is advantageously carried out by bending.
  • the knife set of the kitchen appliance has a diameter between 30 mm and 100 mm.
  • the knife set has a diameter between 40 mm and 50 mm. Due to this diameter, the knife set is particularly suitable in kitchen appliances with a speed of 1000 U / min.
  • the first blade pair and the second blade pair of the blade set are arranged offset at an angle between 45 ° and 135 °.
  • the angular offset between the blade wing pairs is 60 ° to 120 °.
  • the first and / or second blade pair of blades set on two opposing and oppositely extending, crescent-shaped end portions.
  • the second pair of blade wings can have two opposite and opposite, crescent-shaped end sections, so that the convex outer sides of the sickle resulting from the crescent shape of the end sections are aligned in the same direction relative to a direction of rotation.
  • the second blade pair, the cutting having convex sickle outer sides have clockwise direction of rotation. It may be advantageous if the cutting obliquely, that is inclined to a horizontal, are arranged, whereby the food in the container receives a preferred direction with respect to the axial flow.
  • the end portions of the first pair of blade wings also run sickle-shaped, but wherein the cutting edge is formed in the first blade pair on the sickle inside.
  • the first pair of blades wing rectified cutting can be formed, which further viewed in the direction of rotation, rectified to the cutting edges of the second blade pair run.
  • the container has a height of 50 mm or more, particularly preferably 1 10 mm or more, especially preferably 120 mm or more. and. It is advantageous if the container has a height of 160 mm or less, more preferably 150 mm or less, particularly preferably 140 mm or less. By the height of the container can be ensured that a predefined amount of food in a relatively short time by the kitchen appliance, for example, crushed, ground or pureed. If the container is higher, it may result in too much food being introduced into the container, making the processing of the food longer or the food not satisfactorily processed.
  • the kitchen appliance has a drive unit which sets the knife at 2000 rpm or more, more preferably 5000 rpm, more preferably 7000 rpm, more preferably 10000 rpm or more, and most preferably 15000 rpm or more power.
  • the drive unit may drive the blade set at not more than 30,000 rpm, preferably not more than 25,000 rpm, more preferably not more than 22,000 rpm.
  • the drive unit comprises a drive of a blender, wherein the drive of the blender is connected via an adapter piece with the container, and the blade set is connected via a drive shaft to the drive of the blender.
  • the term blender describes a stick blender which comprises an elongated housing enclosing a motor and having at its end a coupling means for mounting a replaceable tool, such as a universal crusher. On the housing of the blender bar are also preferably provided controls for switching on and for speed control of the motor and for releasing a tool used.
  • Fig. 1 an inventive kitchen appliance in elevation and without drive unit and without cover;
  • FIG. 2a shows a simplified schematic arrangement of a knife set according to the prior art in a kitchen appliance
  • Fig. 2b is a plan view of the schematic arrangement of Fig. 2a;
  • 3a shows a simplified schematic arrangement of a set of blades in one
  • Fig. 3b a plan view of the schematic arrangement of Fig. 3a;
  • FIG. 5 is a plan view of the blade set of FIG. 4; FIG.
  • Fig. 6 is a side view of the blade set of Fig. 4.
  • FIG. 7 shows a further side view of the knife set of FIG. 4.
  • FIG. 1 an electric motor-operated kitchen appliance 1 for crushing food, with - a container 2 for receiving food is shown.
  • the drive unit not shown, is located under the container 2.
  • the container 2 is in This embodiment shown as part of a universal shredder.
  • the adapter piece 4 for connecting the coupling device (not shown) of the drive with a drive shaft 5 is formed in this embodiment as a container lid. It is not apparent that the adapter piece 4 discloses a passage, so that a drive shaft 5 can be connected to the coupling device of the blender 17.
  • the drive shaft 5 is arranged in the adapter piece 4. On the drive shaft 5, a blade set 6 is arranged.
  • the container 2 has a height of about 120 mm.
  • a corresponding amount of food can be introduced.
  • the foodstuffs are then chopped with the knife set 6 inside the container 2 by means of the drive unit connected via the drive shaft 5 at a speed of about 20,000 rpm, for example.
  • FIG. 2 a schematically illustrates an arrangement with a drive shaft 5 and a blade set 6 in a kitchen appliance 1 of the prior art.
  • a drive shaft 5 on which a blade set 6 is arranged has been illustrated in FIG. 2 a.
  • the drive shaft 5 has two bearings 9, wherein a bearing 9 above and a bearing 9 are arranged below the blade set 6.
  • a bearing 9 above and a bearing 9 are arranged below the blade set 6.
  • FIG. 2 a only one set of knives 6 with a pair of knife wings 8 is shown in FIG. 2 a. It can be seen that the first blade blade 7 and the second blade blade 7 of the blade pair 8 are arranged at a distance from each other.
  • the drive shaft 5 of the kitchen appliance 1 is driven by a drive unit 3, not shown.
  • the drive shaft 5 rotates in the direction of the arrow.
  • the blade wings 7 are also rotated in the direction of the arrow. Due to the centrifugal force occurring, the masses of the blade wings 7 act to the outside.
  • Fig. 1 by means of the arrows F1 and F2.
  • the masses of the blade wings 7 are the same, so that no imbalance arises by the use of the kitchen appliance 1. If the kitchen appliance 1 has a speed of about 20,000 rpm, due to the spaced arrangement of the blade wings 7, a vibration in the drive shaft 5. The resulting vibration is transmitted to the bearings 9 of the drive shaft 5 and lead to a tilting moment in the bearings 9. This in turn leads to an increased load in the bearings 9, which can lead to failure of the bearing 9.
  • Fig. 3a is a simplified representation of a drive shaft 5 of a kitchen appliance 1 of the present invention is shown.
  • Fig. 3a shows only for simplicity schematically the drive shaft 5 on which a blade pair 6 is arranged.
  • the blade pair 6 is arranged symmetrically with respect to the rotation axis B of the drive shaft 5.
  • the drive shaft 5 is driven by a drive unit, not shown.
  • the masses of the blade wings 7 act to the outside.
  • FIG. 3 a it can be seen that the axis of rotation B coincides with the geometry axis C of the blade pair 8. For this reason, tilting moments can be partially or completely avoided in the bearings 9 of the drive shaft 5 and consequently, even at speeds> 1000 U / at least less or no vibration in the drive shaft 5. It is thus possible to operate the kitchen appliance 1 longer.
  • FIGS. 4 and 5 show a blade set 6 for a kitchen appliance 1 of the present invention.
  • the knife set 6 has an upper section 10 with a first blade pair 8, and a lower section 11 connected to the upper section 10 with a second blade pair 12, wherein the blade set 6 is arranged inside the container 2.
  • the blade set 6 has a smooth surface and the blade wing ends are not bent upwards or downwards.
  • FIG. 4 it can be seen in FIG. 4 that in the upper section 10 the blade blades 7 of the first blade pair 8 are arranged symmetrically with respect to a rotation axis B of the blade set 6, and in the lower section 11 the blade blades 13 of the second blade pair 12 are related symmetrically a rotation axis B of the blade set 6 are arranged symmetrically.
  • the first and second blade pairs 8, 12 each extend horizontally. Both the blade wings 7 of the first blade pair 8 extend on the same plane, and the blade wings 13 of the second blade pair 12 extend on the same plane, the plane of the second blade pair 12 is spaced from the plane of the first blade pair 8.
  • the blade set 6 has a diameter d of about 80 mm.
  • the second pair of blade wings 12 has two opposite and oppositely extending, sickle-shaped end portions 14. The sickle-shaped end portions 15 have on the convex sickle outside cutting 16.
  • the blades 16 of the first blade pair 8 point in the same direction as the blades 16 of the second blade pair 12.
  • FIGS. 6 and 7 Two side views of the knife set 6 are shown in FIGS. 6 and 7. There and in Fig. 4 it can be seen that the blade set 6 is produced in one piece.
  • the first blade pair 8 is connected by a vertically bent down connecting piece 14 with the second blade pair 12.
  • the distance between the first blade pair 8 and the second blade pair 12 of the blade set 6 is in this embodiment, about 10 mm.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Food Science & Technology (AREA)
  • Food-Manufacturing Devices (AREA)

Abstract

L'invention concerne un ustensile de cuisine (1) entraîné par un moteur électrique et servant à broyer des aliments, comprenant un ensemble d'entraînement (3) capable d'entraîner un jeu de couteaux (6) à une vitesse de plus de 1000 tr/min autour d'un axe de rotation (B). Le jeu de couteaux (6) comporte une partie de couteaux supérieure (10) qui s'étend dans un premier plan radial et une partie de couteaux inférieure (11) qui s'étend dans un second plan radial espacé du premier dans le sens de l'axe de rotation (B). Le jeu de couteaux (6) est configuré de telle sorte qu'il ne présente pas de balourd dynamique par rapport à l'axe de rotation (B). Grâce à l'invention, on dispose d'un ustensile de cuisine (1) entraîné par un moteur électrique qui permet un temps de fonctionnement prolongé.
EP13721662.8A 2012-05-09 2013-05-03 Mixeur Withdrawn EP2846667A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012207711A DE102012207711A1 (de) 2012-05-09 2012-05-09 Elektromotorisch betriebenes Küchengerät zum Zerkleinern von Lebensmitteln
PCT/EP2013/059253 WO2013167487A1 (fr) 2012-05-09 2013-05-03 Mixeur

Publications (1)

Publication Number Publication Date
EP2846667A1 true EP2846667A1 (fr) 2015-03-18

Family

ID=48407485

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13721662.8A Withdrawn EP2846667A1 (fr) 2012-05-09 2013-05-03 Mixeur

Country Status (4)

Country Link
EP (1) EP2846667A1 (fr)
CN (1) CN104254271A (fr)
DE (1) DE102012207711A1 (fr)
WO (1) WO2013167487A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014217241A1 (de) 2014-08-28 2016-03-03 BSH Hausgeräte GmbH Messeranordnung für ein Küchengerät sowie Küchengerät mit einer Messeranordnung
DE102014220631B4 (de) 2014-10-10 2017-11-16 BSH Hausgeräte GmbH Küchengerät zum Zerkleinern eines Bearbeitungsguts
CN108294073A (zh) * 2018-03-19 2018-07-20 江门市欧迪斯电器有限公司 一种用于家用和面机上的刀具
CN109875424B (zh) * 2019-03-28 2021-10-08 九阳股份有限公司 一种低噪高效的食品加工机
CN111990907A (zh) * 2020-08-21 2020-11-27 台州敏瑞科技有限公司 一种料理机的刀片及装配装置

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DE1066716B (de) 1959-10-08 Vorwerk &. Co., Wuppertal-Barmen Messersatz für motorisch anetriebene Schneidvorrichtungen
GB650870A (en) 1948-07-13 1951-03-07 Oertli Ag T Improvements in or relating to rotatable cutting heads for chopping, mincing, mixingor like machines
US2788038A (en) 1954-11-02 1957-04-09 Standard Electronics Corp Rotor
AU4230593A (en) 1992-05-01 1993-11-29 Sunbeam Corp. Blender with improved blade assembly
DE19502216C1 (de) * 1995-01-25 1996-01-04 Braun Ag Schneidmesser, insbesondere zur Zerkleinerung von Lebensmitteln, zur Befestigung an einer schnellaufenden Antriebswelle
CN2313510Y (zh) * 1997-10-21 1999-04-14 广州市越秀区东宇五金电器厂 一种家用搅拌机的绞肉刀
DE10212029A1 (de) * 2002-03-19 2003-10-02 Vorwerk Co Interholding Messersatz für eine elektromotorisch betriebene Küchenmaschine sowie Küchenmaschine hierzu
US7004414B2 (en) 2004-02-04 2006-02-28 Mei Chi Chen Blade for food processors
US7641380B2 (en) * 2007-02-16 2010-01-05 Sunbeam Products, Inc. Blender/food processor blade arrangement for small throated blender jars
RU2459567C2 (ru) * 2007-06-04 2012-08-27 Бревилл Пти Лимитед Составной нож-насадка для кухонного комбайна
DE102008035981A1 (de) * 2008-08-01 2010-02-04 BSH Bosch und Siemens Hausgeräte GmbH Drehantreibbares Schneidmesser, Herstellverfahren und Küchengerät
US20100071219A1 (en) * 2008-09-22 2010-03-25 Kuan-Chih Lin Cutter of a juicer
JP2012531245A (ja) * 2009-06-24 2012-12-10 メナスヘス，デイビッド フードプロセッサ用の汎用ブレードおよびアクセサリ
CN101756645B (zh) * 2009-10-23 2011-06-08 慈溪市西贝乐电器有限公司 一种家用食品加工机可拆卸刀片的锁定机构
US8056848B1 (en) * 2010-07-27 2011-11-15 Kai-Fu Liang Blade assembly of a blender
CN201806574U (zh) * 2010-08-21 2011-04-27 广东新宝电器股份有限公司 搅拌机
US8132752B1 (en) * 2010-12-24 2012-03-13 Island Oasis Frozen Cocktail Company, Inc. Blade structure for blender

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Also Published As

Publication number Publication date
CN104254271A (zh) 2014-12-31
WO2013167487A1 (fr) 2013-11-14
DE102012207711A1 (de) 2013-11-14

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