DE202009009042U1 - Head part for a stirring tool - Google Patents

Abstract

Stirring tool (10), in particular for Teigrühren, with a about a drive axis in a rotational direction rotatable about a rotation axis hub part (11), wherein the stirring tool has an upper coupling part (14) and this at the transition to the hub part (11) has a first cross-sectional area and the hub part below the coupling has a second cross-sectional area, characterized in that the first cross-sectional area and the second cross-sectional area are of different shape and that between the hub and the coupling a horizontal disc (15) projecting at least partially beyond the first cross-sectional area and over the second cross-sectional area is provided ,

Description

Field of the invention

The The present invention relates to a stirring tool, and more particularly its headboard and its hub, preferably for a food processor. For example, the stirring tool in a standard device (which typically with a mixing bowl connected) are used. It can also be used in a hand mixer be used. In particular, it is also for use suitable with the drive unit of a blender.

Background of the invention

For Kitchen machines, but also for other mix, Stirring and crushing tasks is a variety of Stirring tools known.

US 2006/0062079 A1 (Applicant: Ekato Solidmix GmbH) discloses a stirrer with two adjustable arms for use in a trough. This stirring tool can be supplemented by a comminution tool. The mechanical construction is demanding. The additional use of a crushing tool seems rather expensive.

EP 1982624 A1 (Electrodomesticos Taurus SL) discloses a kitchen tool, especially for a blender. This tool should have three or more blades and be made of metal. The blades are oriented in different angular directions to promote the mixing of food in a stirred pot. Apart from their orientation, the blades are essentially of simple symmetrical shape. Therefore, it seems unlikely that a stirring result could be achieved which would be sufficient for about to stir cake dough.

US 2,193,686 (Craddock) discloses a stirring tool with substantially propeller-shaped stirring blades, which additionally have certain claws or webs. Although this stirring tool may perform its task effectively, but is demanding in the production and can probably be made only of metal, to have sufficient stability in its complicated shape.

EP 193128 A2 (SEB SA) discloses a tool which is particularly useful for the preparation of jams. The stirring tool shows relatively large stirring blades. An agitating blade is aligned in the direction of rotation and one opposite to the direction of rotation. The mixing paddles are tailored to a mixing bowl to be used. With another mixing bowl, the stirring tool is obviously bad or impossible to use. Due to the size of the stirring blades, a considerable torque is required to achieve both sufficient mixing and crushing of fruits and the like.

The The present invention seeks to address the weaknesses in Avoid prior art. In particular, should be a good mix also solid batter with a simple and inexpensive be made to be produced tool. This tool should also be usable with kitchen machines, which no can provide high torque. Furthermore, a quick and clean coupling with the drive unit to be possible.

These Task is solved by a stirring tool according to claim 1.

Main features and description of the invention

The The present invention relates to a stirring tool, preferably for a food processor. In particular, it works around a stirring tool, with one around a drive axle in a rotation direction rotatable hub part, wherein the hub part has a first surface which has at least one depression, characterized in that in the region of the depression a recess is provided, through which the first surface with a second surface of the hub part is connected.

The Hub part can have very different shape, such as a essentially cylindrical shape, alternatively a more complex shape. However, hub parts which are in accordance with this invention are preferred at least one off-axis region have a convex shape. Particularly preferred are hub parts, which concave-convex shapes exhibit. For example, a hub part is considered, the Cross-section in all radial planes or in at least one radial plane S-shaped is. Such an S-shaped hub part has a central Rotation axis on and closing two elbows. Also conceivable are hub parts, which three or four such elbows exhibit. Each arch has a convex shape in one direction and, off viewed in the other direction, concave shape. It has proven to be beneficial proven when the convex shape is in the direction of rotation. Then that is it leads to a better mixing of the material to be stirred and avoids lump formation near the axis.

At its upper end, the hub part has a certain cross-sectional area, which is referred to herein as a second cross-sectional area. This can therefore be for example S-shaped. You can also simply circle in a cylindrical hub part be round and can take a variety of other forms, which also result from the above description.

The Coupling part is located above the hub part. It can also be one To accept variety of forms. Usually, its shape on the one of a corresponding coupling part, which with the drive unit connected, tuned. For example, this can be a recording be in the lid of a stirred pot. On such a Rühropfdeckel can then, possibly also via a gearbox, the motor unit a blender or the motor unit of a kitchen appliance be used. In particular, it comes into consideration that the Coupling part has a multi-leaf shape. Especially it can be a substantially male clutch for Admission by a female counterpart act. For example It is considered that the coupling part is a cross-shaped Has cross-sectional area. In particular, the so-called first cross-sectional area which the coupling part at its lower Having end, be cruciform. It should be noted that according to the invention Coupling and the hub part do not directly merge into each other. As a result, the first cross-sectional area is usually easy to take at the lower end of the coupling part and the second Cross-sectional area at the upper part of the hub part. According to the invention now between coupling part and hub part, d. H. also between the first cross-sectional area and the second cross-sectional area, a horizontal disc provided. This horizontal disc protrudes both over the first cross-sectional area and above the second cross-sectional area also.

she itself can take various forms, for example it can be square, rectangular, oval or circular.

By doing the horizontal disk over the first and over the second cross-sectional area protrudes, can Cross-sectional areas of very different shape comfortable with the horizontal disk are connected.

It can also be sufficient that the horizontal disc only over protrudes a cross-sectional area, so over the first cross-sectional area or the second Cross sectional area.

The Protruding the horizontal disk over these surfaces, also causes the horizontal disc the Coupling part from contamination or impairment protected by a stirred product. For example Dough do not usually reach the coupling part. Also is the receptacle for the coupling part through this horizontal disc protected.

The Horizontal disc gives the hub part overall more stability and allows to transmit larger torques. It is according to the invention into consideration that the Hub part has a recess. Such a recess can for many reasons and with many benefits be provided, which are explained in more detail below. To compensate for the weakening of the hub part by this Recess, can serve the horizontal disc. That in the horizontal disk provided material additionally fulfills the benefit To keep dough from the coupling, a benefit that the material, which alternatively instead of the recess in the same area Recess could be provided, would not have.

A such recess can have multiple benefits. For example It is possible that a limited amount of mix passes through the recess. This in turn leads to an even better mixing of stirred, in particular Such Rührgutes in the region of the axis of rotation, which usually little is moved.

The Recess can be provided at different axial height become. This will influence whether much or little to be stirred or almost no to be stirred the recess occurs. If the recess is relatively high, so For example, in the upper third of the axis of rotation occurs relatively little mixing material through the recess, provided the stirring tool so high is that this third is not or mostly not immersed in the stirred material. However, the recess also has then significant benefits. It has been shown that at Cleaning the stirring tool, especially in dishwashers, Depending on the position of the material to be stirred, it is easy to leave residual water in the sink remains. The recess allows drainage of the residual water towards the other surface. Depending on the location of the Stirring tool can also cause it to drain to come from water through the recess in almost any other direction. The recess thus makes the stirring easier to clean and especially dishwasher safe.

There is a third relevant area in which the provision of a recess is useful. A stirring tool is often produced as an injection molded part. Such an injection-molded part in each case needs an injection point. Often it is advantageous to provide the injection point centered on the axis of rotation. For this there are essentially two possibilities, namely an injection point at the top of the stirring tool, ie generally in the center of the coupling part or alternatively an injection point at the bottom of the stirring tool, ie usually in the center of the bearing. In both cases, an injected jet of material can spread over the entire length of the hub. It may be too come a so-called "free jet", which is not desired by injection molding.

If now a recess is provided in the region near the axis of the hub, this leads to the fact that the injection mold in the corresponding Area has a bridge. An injected jet will hit this bridge. This will become an uncontrolled Beam path or "free jet" avoided.

consequently It is inventively advantageous that the Rotation axis passes through the recess. Also It is advantageous if the recess in the area of the upper third or is provided in the region of the lower third of the rotation axis.

One Inventive stirring tool can in have its lower third stirring arms. additionally For example, the stirring tool may have mixing blades which advantageously in a kink-free transition into the Go over the hub part.

According to the invention also any motor-driven kitchen appliance with a stirring tool as described herein posed. The invention further provides a method for whipping (and / or stirring) dough with a stirrer of the type described herein.

The Stirring tool according to the invention can next the stirring arms described still stirring arms or so-called mixing vanes of other types. In question come for example, stirring arms or so-called mixing blades short length but large area, the Mixing mixes near the hub part promote.

The Stirring tool can be made entirely of a material become. Advantageously, it can be produced by injection molding become. Especially plastic, especially polyoxymethylene (POM). Other engineering plastics with good stiffness and good coefficients of friction, which can thus form a good lower deposit, are also usable.

The Method for whipping dough is advantageously 800 up to 1000 revolutions per minute. Compared for battering with other tools is a significantly reduced Torque required. This is especially true for the Beat heavy doughs. As a reference batter may be shortcrust pastry serve. Hitting a reference shortcrust pastry with a conventional kitchen machine attachment, such as the dough hook of Braun device K700 requires up to 1 Nm of torque. The However, inventive stirring tool allows such To stir dough with a maximum torque of 0.5 Nm.

To the better understanding of the invention should also the following Illustrations serve. As far as herein and in the associated Explanatory text technical features presented in a specific combination These are also available as individual and in other combinations to be disclosed, as far as such combinations are technically meaningful and possible. In the pictures show:

1 an overall perspective view of the stirring tool,

2 a side view of the stirring tool.

1 leaves a perspective view of the stirring tool 10 and recognize its main elements. This includes in particular the hub part 11 , As can already be seen in this view, the hub part is designed substantially wavy in its cross section. The hub part 11 thus has a first arc 12 which in this view is convex towards the viewer, and a second arch adjoining it 13 which is concave in this view. This allows to transmit high torques with little material and has the additional effect that the hub part can make a contribution to the mixing of dough. At the top of the hub 11 closes a ring 15 and the upper coupling part 14 at.

It can be seen that the hub part has a substantially S-shaped cross-section at its upper end. The S is not quite complete because of the recess in the middle, but consists essentially of two unconnected arches. These determine the first cross-sectional area. As can likewise be clearly seen, the coupling part directly above the ring has a cross-shaped cross-section, which therefore determines the second cross-sectional area. The intended here as a horizontal disc ring 15 serves to connect both cross-sectional surfaces and protrudes beyond both.

With this coupling part 14 can the stirring tool 10 can be conveniently used in a drive unit. The drive unit is, for example, the upper lid of a stirred pot into consideration, which is connected to a motor part. Below you can see the first mixing arm 20 and opposite the second stirring arm 30 , Furthermore, two mixing blades are provided offset by 90 ° to the direction defined by the two stirring arms, namely a first mixing blade 40 and opposite a second mixing blade 42 , At the first mixing arm 20 you can see the face turned towards the viewer 22 , Radial inside is the part 24 of the Striking surface while the part 26 connected as a radially outer part. The viewer looks at the slanted surface 28 , which are at the first mixing arm 20 to the clubface 22 connects and is directed upwards.

2 shows a side view of the stirring tool 20 , As striking elements are in turn the hub part 11 to recognize and the upper coupling part 14 , Furthermore, you can see the first mixer 20 and the second paddle 30 as well as the first mixing blade 40 and the second mixing blade 42 , The mixing vanes are of the same height along the direction of the axis of rotation. One recognizes in this view also particularly well that the first paddle 20 below the second stirring arm 30 is arranged. (Below means here in the direction of the axis of rotation, closer to the bearing to.) The arrangement of stirring arms at different heights has proven to be particularly effective for good kneading particularly heavy doughs. It is advantageous if the lower paddle an upwardly inclined surface 28 having.

It can be seen from the figure further that in the hub part 11 a recess 18 is provided. This is in the upper third of the hub, just below the ring 15 positioned. The ring 15 reinforces the hub part in this area so that the hub part, despite the material savings achieved by the recess can transmit a high torque.

Out The description has become clear overall, like a stirring tool can be prepared with which even heavy doughs are stirred effectively can and which even with a drive of low Torque comes off.

10

agitator

11

hub part

12

first bow

13

second bow

14

upper coupling part

15

ring

16

depository

18

recess

20

first agitator

22

Playing surface

24

radial inside part

26

radial outside part

27

outer end

28

sloping surface

30

second agitator

40

first mixing blades

42

second mixing blades

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• US 2006/0062079 A1 [0003]
• EP 1982624 A1 [0004]
• - US 2193686 [0005]
• - EP 193128 A2 [0006]

Claims (7)

Stirring tool ( 10 ), in particular for dough stirring, with a hub part rotatable about a drive axis in a direction of rotation about a rotation axis ( 11 ), wherein the stirring tool is an upper coupling part ( 14 ) and this at the transition to the hub part ( 11 ) has a first cross-sectional area and the hub portion below the coupling has a second cross-sectional area, characterized in that the first cross-sectional area and the second cross-sectional area are of different shape and that between the hub and the coupling extends beyond the first cross-sectional area and beyond the second cross-sectional area Horizontal disc ( 15 ) is provided. Stirring tool ( 10 ) according to claim 1, wherein the horizontal disc ( 15 ) is circular. Stirring tool ( 10 ) according to claim 1 or 2 with a hub part ( 11 ), whose cross-section is S-shaped in at least one radial plane. Stirring tool ( 10 ) according to one of the preceding claims, in which the hub part ( 11 ) a recess ( 18 ) having. Stirring tool ( 10 ) according to one of the preceding claims, in which the recess ( 18 ) is provided in the region of the upper third of the axis of rotation. Stirring tool ( 10 ) according to one of the preceding claims, which is produced as an injection molded part. Motor-driven kitchen appliance with a stirring tool ( 10 ) according to any one of the preceding claims.