Food preparation device for a food preparation appliance

Abstract

The invention relates to a food preparation device for a food preparation appliance, the device comprising: - an inner rotating shaft (10); - a work tool (20) mounted on the inner rotating shaft (10) via a helical connection, characterised in that: - the food preparation device comprises a drive device (30) with a first rotating hub (31) and a second rotating hub (32); - the inner rotating shaft (10) is capable of being coupled to the first rotating hub (31); - the food preparation device comprises a hollow rotating shaft (40): • mounted on the inner rotating shaft (10) via a pivot or a sliding pivot connection; • comprising a bevelled contact surface (41); and • comprising the second rotating hub (32), wherein the work tool (20) comprises a mating surface (25) arranged so as to come into contact with the bevelled contact surface (41).

Description

Food preparation device for a food preparation appliance Technical field of the invention

[0001] The present invention relates generally to food preparation appliances, and in particular to household appliances equipped with or comprising at least one rotating working tool, such as a mincer, a knife, a beater, a mixer, etc., intended to work food, for example, placed in a working tank. State of the art

[0002] It is known in the prior art of devices to provide a vertical movement of the working tool in the working tank to provide homogeneous working of all the food contained in the working tank. Document EP2445636B1 discloses such a device. On the other hand, the disclosed mechanism is complex with many components that are difficult to manufacture and assemble.

[0003] An aim of the present invention is to address the drawbacks of the prior art mentioned above and in particular, first of all, to propose a food preparation device for a food preparation appliance which makes it possible to work food contained in a working tank over the entire height of the food and / or in a more homogeneous manner, without adding complexity or requiring parts which are difficult to manufacture.

[0004] For this purpose, a first aspect of the invention relates to a culinary preparation device for a culinary preparation appliance, the culinary preparation device comprising:

[0005] - an internal rotating shaft,

[0006] - a working tool mounted in a helical connection on the rotating internal shaft,

[0007] characterized in that:

[0008] - the food preparation device comprises a drive device with a first rotating hub and a second rotating hub respectively arranged to be driven in rotation at a first rotation speed and at a second rotation speed,

[0009] - the rotating internal shaft comprises a first coupling arranged to couple with the first rotating hub to be driven in rotation according to the first rotation speed,- the food preparation device comprises a rotating hollow shaft: mounted in pivot connection or sliding pivot on the rotating internal shaft, comprising a beveled contact surface, and comprising the second rotating hub, or a second coupling arranged to be coupled with the second rotating hub, to be driven in rotation according to the second rotation speed, in which the working tool comprises a counterform,

[0010] and wherein the beveled contact surface is arranged to contact the counterform of the working tool to force axial movement of the working tool on the rotating internal shaft.

[0011] According to the above implementation, the device generally comprises on the one hand a drive device with two rotating hubs, and a tool holder assembly (the rotating internal shaft, the working tool and the rotating hollow shaft). The tool holder is therefore composed of only three parts, which forms a simple assembly to manufacture and assemble, and yet the working tool can move axially. In particular, it can be noted that the helical connection is provided to raise the working tool along the rotating internal shaft, while the rotating hollow shaft with its beveled contact face is provided to force a downward axial displacement. In detail, the working tool, when rotating at the first rotational speed and working the food to be prepared, undergoes a reaction force from the food, which causes the upward axial displacement due to the helical connection.The rotating hollow shaft with its beveled contact face and rotating at a second rotational speed is therefore in relative motion with the working tool, which causes a relative displacement between the counterform of the working tool and the beveled contact surface of the rotating hollow shaft and forces a downward movement of the working tool.

[0012] According to one embodiment, the first rotating hub is pivotally mounted on the second rotating hub. According to this implementation, the first rotating hub is pivotally mounted on the second rotating hub, and it can typically be provided that the second rotating hub forms or comprises a ring or a bearing crossed by the first rotating hub and / or the rotating internal shaft.

[0013] According to one embodiment, the helical connection of the working tool to the rotating internal shaft has a helix angle of between 30° and 60°. Such a helix angle allows the working tool to move axially under the effect of the reaction force exerted by the worked food on the working tool.

[0014] According to one embodiment, the beveled contact surface and / or the counterform comprises or has:- at least one tangent or tangent direction inclined relative to an axial direction of the rotating internal shaft, and / or- at least one normal or normal direction having a first component parallel to an axial direction of the rotating internal shaft and a second component normal or perpendicular to an axial direction of the rotating internal shaft. The beveled contact surface and / or the counterform are well adapted to transmit an axial force which will cause an axial displacement of the working tool.

[0015] According to one embodiment, the first coupling is formed at a first end of the rotating internal shaft, and the rotating internal shaft comprises a centering portion arranged at a second end of the rotating internal shaft, the food preparation device comprising a centering bearing arranged to receive the centering portion. The centering bearing may be provided at the bottom of a work tank, to properly guide the rotating internal shaft at its two ends.

[0016] According to one embodiment, the food preparation device may comprise a work tank or a food preparation bowl with a side wall and a bottom.

[0017] According to one embodiment, the centering bearing is formed in the bottom of the working tank.

[0018] According to one embodiment, the food preparation device comprises a removable cup forming a removable cap of the working tank, in which the removable cup comprises the first rotating hub and the second rotating hub. The removable cup incorporates the first rotating hub and the second rotating hub so as to form a subassembly that is easy to handle for the user.

[0019] According to one embodiment, the drive device comprises a reducer arranged between the first rotating hub and the second rotating hub.

[0020] According to one embodiment, the reducer comprises at least one double pinion with a first toothed portion engaged with the first rotating hub and a second toothed portion engaged with the second rotating hub. Such a double pinion makes it possible to easily multiply or demultiply the rotation speed of the second rotating hub from the first rotating hub.

[0021] According to one embodiment, the reducer comprises three double pinions each with a first toothed portion engaged with the first rotating hub and a second toothed portion engaged with the second rotating hub.

[0022] According to one embodiment, the first toothed portion comprises a first number of teeth and the second toothed portion comprises a second number of teeth different from the first number of teeth, so as to have a reduction ratio different from 1 and between 1.2 and 0.8, and preferably between 1.01 and 1.2 so that the second rotation speed is greater than the first rotation speed.

[0023] According to one embodiment, the drive device comprises an input shaft engaged with the first rotating hub and the second rotating hub and arranged to be coupled and driven by a drive motor. The input shaft may form a drive nut for coupling with the drive motor quickly and securely.

[0024] According to one embodiment, the input shaft is formed on the first rotating hub.

[0025] According to one embodiment, the drive device comprises at least one drive motor engaged with the first rotating hub and the second rotating hub, and the drive device preferably comprises a single drive motor engaged with the first rotating hub and the second rotating hub.

[0026] According to one embodiment, the removable cup comprises the drive device.

[0027] According to one embodiment, the removable cup is part of a housing containing said at least one drive motor.

[0028] According to one embodiment, the drive motor may be provided removable from the rest of the drive device, typically the drive motor may be provided removable or detachable from the removable cup to allow for possible cleaning.

[0029] According to one embodiment:- the rotating hollow shaft comprises a first end with the beveled contact surface and a second end with the second coupling arranged to couple with the second rotating hub, or- the rotating hollow shaft comprises a first end with the beveled contact surface and a second end with the second rotating hub and preferably the rotating hollow shaft is formed in one piece with the second rotating hub.

[0030] According to one embodiment, the bottom of the work tank is removable and includes a seal. Cleaning is made easier.

[0031] According to one embodiment, the assembly of the first rotating hub and the first coupling forms a spline coupling.

[0032] According to one embodiment, the assembly of the second rotating hub and the second coupling forms an asymmetrical tooth coupling, each tooth having a stop face parallel to an axial direction of the rotating inner shaft and a sliding face inclined relative to the axial direction of the rotating inner shaft. The inclined sliding face makes it possible to compensate for an angular offset, and the stop face makes it possible to transmit the driving force to the rotating hollow shaft.

[0033] According to one embodiment, the beveled contact surface and the counterform are essentially flat faces, inclined relative to the axial direction of the rotating internal shaft. However, complex and non-flat surfaces can be provided.

[0034] According to one embodiment, the beveled contact surface and the counterform are helical faces, inclined relative to the axial direction of the internal shaft rotating by a predetermined helix angle.

[0035] According to one embodiment, the removable cup comprises a movable safety device, arranged to engage with the work tank and with a control unit of the drive motor only if it is engaged with the work tank.

[0036] According to one embodiment, the first rotation speed is different from the second rotation speed, and preferably the first rotation speed is in the same direction as the second rotation speed. Description of figures

[0037] Other characteristics and advantages of the present invention will appear more clearly on reading the following detailed description of an embodiment of the invention given by way of non-limiting example and illustrated by the appended drawings, in which:

[0038] represents a general view of a food preparation apparatus according to the present invention, generally comprising a work tank, a drive device and a motor housing;

[0039] represents the work bowl - drive device subassembly of the, with a side wall of the work bowl removed or made transparent to show a tool holder assembly disposed in the work bowl;

[0040] represents a rotating internal shaft, a working tool, a rotating hollow shaft of the tool holder assembly and a first rotating hub of the drive device of the;

[0041] represents the rotating internal shaft of the mount on a bottom of the working tank;

[0042] represents the working tool of the;

[0043] represents two perspective views of the first rotating hub of the;

[0044] represents the rotating hollow shaft of the ;

[0045] represents two perspective views of the drive device of the 2;

[0046] represents two perspective views of an internal part of the drive device of the 2;

[0047] represents an exploded view of the tool holder assembly of laou 3, with a part of the drive device of laou 2;

[0048] represents a schematic view of the food preparation appliance, ready for operation;

[0049] represents a schematic view of the food preparation apparatus, after an upward axial movement of the working tool;

[0050] represents a schematic view of the food preparation apparatus, after a downward axial movement of the working tool;

[0051] represents a schematic view of an alternative embodiment of the drive device and the rotating hollow shaft of the food preparation appliance of the;

[0052] represents another schematic view of the alternative embodiment of the drive device and the rotating hollow shaft of the food preparation appliance of the.

[0053] Detailed description of embodiment(s)

[0054] The figure represents a general view of a food preparation appliance according to the present invention, generally comprising a working tank 50, a motor housing 60 housing a drive motor and a drive device 30 arranged between the working tank 50 and the motor housing 60.

[0055] As shown in the, the working tank 50:- comprises a side wall 52 (removed or transparent, shown in dotted lines) and a bottom 51,- contains a rotating internal shaft 10 which supports a working tool 20 and a rotating hollow shaft 40,- supports in the upper part the drive device 30 which can receive the motor housing 60 of the and transmit to the working tool 20 a rotational drive movement of the motor housed in the motor housing 60.

[0056] It may be noted that the drive device 30 is interposed between the work tank 50 and the motor housing 60 to drive the work tool 20. On the, the drive device 30 closes the work tank 50 and is detached from the motor housing 60. A reversible coupling may be provided between the drive device 30 and the motor housing 60, but it may preferably be provided to integrate the drive device 30 permanently on the motor housing 60, or a removable coupling may be provided between the drive device 30 and the motor housing 60 for cleaning, for example.

[0057] In any event, the drive device 30 (or the motor housing 60 in the case where the drive device 30 is included or permanently integrated on the motor housing 60) is intended to couple reversibly with the work tank 50 to open and close it in order to be able to put or remove food and / or the work tool 20.

[0058] On the, it can be noted that the drive device 30 comprises a first rotating hub 31, a removable cup 35 serving as a carcass or chassis for the drive device 30, a sealing plate 33 and slats 34 which are part of a safety device preventing the motor of the motor housing 60 from starting if the work tank 50 is not correctly coupled to the removable cup 35.

[0059] The figure represents the rotating internal shaft 10 which supports the working tool 20, and a rotating hollow shaft 40 on which is directly formed a second rotating hub 32 which receives the first rotating hub 31.

[0060] In other words, and as will be explained below, a pivot connection is provided between the first rotating hub 31 and the second rotating hub 32 (the rotating hollow shaft 40 in this embodiment): these two parts can rotate freely relative to each other.

[0061] It is intended to be possible to move the working tool 20 axially along the rotating internal shaft 10, in a reciprocating motion. For this purpose, a helical connection is provided between the rotating tool 20 and the rotating internal shaft 10.

[0062] The watch shows the rotating internal shaft 10 mounted in pivot connection on the bottom 51, with a double thread 12 provided up to approximately halfway up the rotating internal shaft 10. The upper part of the rotating internal shaft 10 remains smooth and the upper end of the rotating internal shaft 10 forms a splined end piece 13 which forms a first coupling for engaging with or in the first rotating hub 31. The lower part of the rotating internal shaft 10 includes a centering portion which is thus arranged at a second end of the rotating internal shaft 10,

[0063] The bottom 51 is assembled in a sealed manner with the side wall 52 of the working tank 50. A centering bearing 53, better visible in Figures 11 to 15, is formed in the bottom 51 of the working tank 50. The centering bearing 53 is arranged to receive the centering portion.

[0064] The figure represents the working tool 20, which comprises a main body 24 on which two blades 23 are mounted, and which is extended by a beveled shaft which comprises a central bore 21 passing through, with helical grooves 22 and a beveled lateral surface forming a counterform 25 (with two beveled faces visible on either side of the bore 21). It can be noted that the rotating internal shaft 10 is provided to pass through the central bore 21, and that the double thread 12 can engage with the helical grooves 22.

[0065] During the rotation of the working tool 20 imposed by the rotating internal shaft 10, the worked food in return exerts a force or a reaction torque on the working tool 20, and the helical connection makes it possible to transform this force or this reaction torque into an axial force to cause an axial displacement upwards of the working tool 20.

[0066] In the example shown, the working tool 20 carries two blades 23 for cutting food, but all sorts of variants can be provided, to make a mincer, a beater, a mixer, a kneader, etc.

[0067] The shows two perspective views of the first rotating hub 31, which comprises a splined head 311, a first toothed portion 312 and a lower shaft portion 313. It can be noted that in the right-hand view, the lower shaft portion 313 comprises a grooved bore 314, which is provided to receive the splined end piece 13 of the rotating internal shaft 10. The first rotating hub 31 is provided to rotate the rotating internal shaft 10.

[0068] La represents a perspective view of the rotating hollow shaft 40. As seen above, in this exemplary embodiment, the second rotating hub 32 is directly integrated into the rotating hollow shaft 40. However, two separate parts can be provided. In the example of la, the rotating hollow shaft 40 comprises a central bore 323 which can receive: - from above the lower shaft portion 313 in pivot connection, and - from below the rotating internal shaft 10.

[0069] A toothed portion 321 is provided in the upper part and a cylindrical shaft 322 is provided to engage in a bearing of the removable cup 35 (a sliding ring, ball bearings, etc. may be provided). Thus, the second rotating hub 32 is in pivot connection with respect to the removable cup 35, and can receive the first rotating hub 31 in pivot connection.

[0070] The rotating hollow shaft 40 also comprises in the lower part a beveled contact surface 41, arranged to cooperate with the beveled lateral surface forming a counterform 25 of the working tool 20.

[0071] Indeed, as explained below, the drive device 30 is provided to drive: - the rotating internal shaft and therefore the working tool 20 at a first rotation speed, via the first rotating hub 31, and - the rotating hollow shaft 40 at a second rotation speed, via the second rotating hub 32, so that the rotating hollow shaft 40 and the working tool 20 have an angular speed differential, and a constant angular phase shift occurs between these two parts during the working of the food.

[0072] As seen above, the working tool 20 is naturally pushed upwards by the reaction torque of the worked food and the helical connection, so that the counterform 25 of the working tool 20 ends up coming into contact with the beveled contact surface 41 due to the angular velocity differential between the rotating hollow shaft 40 and the working tool 20. During a relative rotation between the rotating hollow shaft 40 and the working tool 20 over 360°, the beveled contact surface 41 slides on the counterform 25 to alternately: - push the working tool 20 downwards, then - let the working tool 20 rise upwards. The axial movement of the working tool 20 is therefore an alternation of rises and descents in the working tank 50.

[0073] In detail, the drive device 30 shown in figures 8 and 9 comprises the removable cup 35 which supports in this embodiment: on the one hand in the upper part (left view of the): - the first rotating hub 31 in the upper part, - the sealing plate 33, - the blades 34 of the safety device, on the other hand in the lower part (right view of the): - the rotating hollow shaft 40.

[0074] It can be noted that the slats 34 are visible in the right-hand view, and open into a groove which must receive the side wall 52 of the working tank 50: a movement is imposed on the slats 34 if the side wall 52 is correctly in place, which makes it possible to detect correct assembly to allow the engine to operate safely.

[0075] The inside of the cup 35 shows three double pinions 36 engaged between the first rotating hub 31 and the second rotating hub 32. The double pinions 36 are identical, with a first toothed portion engaged with the first rotating hub 31 and a second toothed portion engaged with the second rotating hub 32. To impose the speed differential between the rotating hollow shaft 40 and the working tool 20, the first toothed portion has a different number of teeth than the second toothed portion. A reduction ratio of between 0.8 and 1.2 can be provided. For example, one difference tooth can be provided for every 20 teeth.

[0076] In summary, the first rotating hub 31 is driven by the motor of the food preparation appliance at a first rotational speed, and transmits this movement:- to the rotating internal shaft 10 directly and without a reduction ratio,- to the double pinions 36. The double pinions 36 in turn drive the rotating hollow shaft 40 in rotation, but due to the difference in the number of teeth between the first toothed portion and the second toothed portion, the rotating hollow shaft 40 has a second rotational speed, different from the first rotational speed.

[0077] The diagram shows an exploded view of the assembly described above: - the rotating internal shaft 10 supports the working tool 20 in the lower part, - the first rotating hub 31 is mounted in the second rotating hub 32, - the three double pinions 36 are engaged between the first rotating hub 31 and the second rotating hub 32, - the splined end piece 13 of the rotating internal shaft 10 is engaged in the grooved bore 314 of the lower shaft portion 313 of the first rotating hub 31.

[0078] This is a schematic presentation of the food preparation appliance in working configuration, with food to be prepared 200 placed in the working tank 50, with the working tool 20, the rotating internal shaft 10, the hollow shaft 40. The drive device 30 with the removable cup 35 covers the working tank 50 and the motor M is coupled to the first rotating hub 31. The working tool 20 is located at the bottom of the working tank 50. It can be noted that the second rotating hub (here the rotating hollow shaft 40) is mounted on a ball bearing (black squares) fitted into the removable cup 35.

[0079] The food preparation appliance is shown after a certain operating time. The motor M has driven the rotating inner shaft into rotation at the first rotational speed via the first rotating hub 31. The reaction torque exerted by the food to be prepared 200 on the working tool 20 is transformed into an upward axial force by the thread of the rotating inner shaft 10, so that the working tool 20 has moved upwards until it comes into contact with the beveled contact surface of the rotating hollow shaft 40.

[0080] During the following rotations, the rotating hollow shaft 40 being driven at the second rotation speed by means of the double pinions 36, it will move angularly relative to the working tool 20 and gradually push it downwards as shown where it can be seen, compared to the, that the rotating hollow shaft 40 has moved 180° relative to the working tool 20 which is now again at the bottom of the working tank 50.

[0081] Lamontre an alternative embodiment, in which the rotating hollow shaft 40 and the second rotating hub 32 are two separate parts.

[0082] In detail, the second rotating hub 32 still carries the first rotating hub 31 in pivot connection and is mounted on the removable cup 35 by ball bearings (black squares). However, the rotating hollow shaft 40 is in sliding pivot connection on the rotating internal shaft 10, and rests on the working tool 20. A second coupling can be provided between the rotating hollow shaft 40 and the second rotating hub 32, formed for example by lower teeth 62 provided on the side wall of the rotating hollow shaft 40, oriented upwards and by upper teeth 61 provided on the side wall of the second rotating hub 32, oriented downwards. In detail, the upper teeth 61 of the second rotating hub 32 are opposite the lower teeth 62 of the rotating hollow shaft 40 on the, and clearly visible.

[0083] As shown in the, when the removable cup 35 is dismantled, the rotating hollow shaft 40 remains on the rotating internal shaft 10, in the working tank 50. During operation, only the first working phase is different. Indeed, during the first ascent of the working tool 20, the rotating hollow shaft 40 is disengaged from the second rotating hub 32 and rotates at the same speed as the working tool 20.

[0084] When the working tool 20 reaches its top dead center, it forces the rotating hollow shaft 40 to engage with the second rotating hub 32 due to the asymmetrical shape of the lower teeth 62 and the upper teeth 61 of the second coupling. The second rotating hub 32 is then driven at the second rotational speed, and therefore imposes the angular phase shift between the working tool 20 and the rotating hollow shaft 40.

[0085] We then find the operation of the first embodiment: the rotating hollow shaft 40 being then driven at the second rotation speed by means of the double pinions 36, it will move angularly relative to the working tool 20 and gradually push it downwards via the beveled contact surface 41 and the counterform 25.

[0086] A food preparation appliance according to the present invention, and its manufacture, are capable of industrial application.

[0087] It will be understood that various modifications and / or improvements obvious to those skilled in the art may be made to the various embodiments of the invention described in the present description without departing from the scope of the invention.

[0088] In particular, it can be noted that other manufacturing configurations are possible at the level of the first rotating hub and the second rotating hub: the first rotating hub can be mounted on a bearing of the removable cup, the motor shaft can be mounted on a bearing of the removable cup, etc. The removable cup can be directly integrated into the motor housing.

[0089] Other types of reducers can also be used, with more or less pinions to impose the first and second rotation speeds. Satellite differentials can be used, or two separate motors can be used.

Claims

Food preparation device for a food preparation appliance, the food preparation device comprising:- a rotating internal shaft (10),- a working tool (20) mounted in a helical connection on the rotating internal shaft (10),characterized in that:- the food preparation device comprises a drive device (30) with a first rotating hub (31) and a second rotating hub (32) respectively arranged to be driven in rotation at a first rotational speed and at a second rotational speed,- the rotating internal shaft (10) comprises a first coupling arranged to couple with the first rotating hub (31) to be driven in rotation at the first rotational speed,- the food preparation device comprises a rotating hollow shaft (40): mounted in a pivot or sliding pivot connection on the rotating internal shaft (10), comprising a beveled contact surface (41),andcomprising the second rotating hub (32), or a second coupling arranged to be coupled with the second rotating hub (32), to be rotated at the second rotational speed,wherein the working tool (20) comprises a counterform (25),and wherein the beveled contact surface (41) is arranged to contact the counterform (25) of the working tool (20) to force axial movement of the working tool (20) on the rotating inner shaft (10)., Food preparation device according to claim 1, wherein the first rotating hub (31) is pivotally mounted on the second rotating hub (32). Food preparation device according to one of claims 1 to 2, in which the helical connection of the working tool (20) on the rotating internal shaft (10) has a helix angle of between 30° and 60°. Food preparation device according to one of claims 1 to 3, - wherein the first coupling is formed at a first end of the rotating internal shaft (10), wherein the rotating internal shaft (10) comprises a centering portion arranged at a second end of the rotating internal shaft (10), the food preparation device comprising a centering bearing (53) arranged to receive the centering portion. Food preparation device according to one of claims 1 to 4, comprising a working tank (50) with a side wall (52) and a bottom (51). Food preparation device according to claim 5 in its dependency on claim 4, in which the centering bearing (53) is formed in the bottom (51) of the working tank (50). Food preparation device according to one of claims 5 to 6, comprising a removable cup (35) forming a removable cap of the working tank (50), in which the removable cup (35) comprises the first rotating hub (31) and the second rotating hub (32). Food preparation device according to one of claims 1 to 7, wherein the drive device (30) comprises a reducer arranged between the first rotating hub (31) and the second rotating hub (32). Food preparation device according to claim 8, wherein the reducer comprises at least one double pinion (36) with a first toothed portion engaged with the first rotating hub (31) and a second toothed portion engaged with the second rotating hub (32). Food preparation device according to claim 9, wherein the reducer comprises three double pinions (36) each with a first toothed portion engaged with the first rotating hub (31) and a second toothed portion engaged with the second rotating hub (32). Food preparation device according to one of claims 9 to 10, in which the first toothed portion comprises a first number of teeth and the second toothed portion comprises a second number of teeth different from the first number of teeth, so as to have a reduction ratio different from 1 and between 1.2 and 0.8, and preferably between 1.01 and 1.2 so that the second rotation speed is greater than the first rotation speed. Food preparation device according to one of claims 8 to 11, wherein the drive device (30) comprises an input shaft engaged with the first rotating hub (31) and the second rotating hub (32) and arranged to be coupled and driven by a drive motor. A food preparation device according to claim 12, wherein the input shaft is formed on the first rotating hub (31). Food preparation device according to one of claims 1 to 11, wherein the drive device (30) comprises at least one drive motor engaged with the first rotating hub (31) and the second rotating hub (32), and wherein the drive device (30) preferably comprises a single drive motor engaged with the first rotating hub (31) and the second rotating hub (32). Food preparation device according to one of claims 8 to 14 in their dependence on claim 7, in which the removable cup (35) comprises the drive device (30). Food preparation device according to claim 15 as dependent on claim 14, in which the removable cup (35) is part of a housing containing said at least one drive motor.

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