ELECTRICAL HOUSEHOLD APPLIANCE AND SYSTEM FOR FOOD PREPARATION WITH COPLANAR DRIVE

Description

Technical Field

[0001] The invention relates to the general technical field of food preparation appliances comprising a base intended to receive a working container, for example a tank, and comprising a head attached to the base comprising a satellite carrier for driving a working tool, the satellite carrier being driven in rotation around a central axis by a motor. Previous technique

[0002] In conventional food preparation appliances of the type described above, the attachment typically includes an eccentric coupler that allows a working tool to be driven above the base in a satellite motion combining two rotations around two parallel axes. Such an appliance can be used with different working tools mounted alternately on the same coupler, adapted to different culinary tasks. These appliances are often referred to as "stand mixers," even though they can frequently be used for preparations other than baking.

[0003] For example, we know of "kneading" type work tools, generally comprising one or more rigid arms, to allow the mixing of dough in the work container.

[0004] We also know of "whisk" type working tools, generally having one or more thin strands, which can be used to emulsify a preparation contained in the working container.

[0005] In stand mixers, the beater attachment typically rotates at a relatively low speed, for example, between 40 and 250 revolutions per minute. Lower speeds are well-suited to certain culinary tasks, and therefore to certain attachments designed for these tasks, such as dough hooks. However, some culinary tasks, and the attachments used for them, require or benefit from higher rotation speeds. This is the case, for example, with whisk attachments.

[0006] We also know, for example from document GB2453546, of a food preparation appliance designed to drive two different types of work tools, which are intended to be used optimally at different speeds. This appliance includes: a base having a plinth having a reception area configured to receive a work container; a head linked to the base, the head having a satellite carrier which is driven in rotation around a central axis by a motor, and which carries: ▪ a first drive satellite, mounted in free rotation on the satellite carrier around a first working axis, parallel to the central axis and eccentric with respect to the central axis, the first drive satellite comprising: ◊ a first coupler configured to allow coupling and uncoupling of a first working tool and to ensure the drive of the first working tool in rotation around the first working axis with respect to the satellite carrier, the first coupler being arranged opposite the reception area;◊ a first drive gear which has as its axis the first working axis, which is rotationally fixed to the first drive satellite, and which cooperates with an internal toothing of a peripheral ring having the central axis as an axis of symmetry in order to, during a differential rotation of the satellite carrier with respect to the peripheral ring, cause a rotation of the first drive satellite on itself around the first working axis;▪ a second drive satellite, separate from the first drive satellite and mounted for free rotation on the satellite carrier around a second working axis, parallel to the central axis and eccentric with respect to the central axis while being separate from the first working axis, the second drive satellite comprising: a second coupler configured to allow coupling and uncoupling of a second working tool and to ensure the drive of the second working tool in rotation around the second working axis with respect to the satellite carrier, the second coupler being arranged opposite the reception area; ◊ a second drive gear which has as its axis the second working axis and which is rotationally fixed to the second drive satellite.

[0007] In this example, the second drive gear meshes with a second peripheral ring having the central axis as its axis of symmetry to drive the second drive satellite in rotation about itself around the second working axis.

[0008] The two crowns are superimposed along the direction of the central axis, and one of them has conical teeth, which proves complex to produce and results in significant bulk along the direction of the central axis.

[0009] Document WO 2018 / 036780 A1 also describes a food preparation appliance. Description of the invention

[0010] The invention aims to provide a food preparation appliance comprising a first working tool coupler and a second working tool coupler which rotate, around their respective working axis, respectively at rotational speeds whose absolute values ​​are different from each other, while maintaining a simple, compact construction, and not requiring major modification of the architecture of existing appliances.

[0011] To this end, the invention proposes a food preparation appliance comprising: a base having a plinth having a reception area configured to receive a work container; a head linked to the base, the head having a satellite carrier which is driven in rotation around a central axis by a motor, and which carries: a first drive satellite, mounted in free rotation on the satellite carrier around a first working axis, parallel to the central axis and eccentric with respect to the central axis, the first drive satellite comprising: a first coupler configured to allow coupling and uncoupling of a first working tool and to ensure the rotational drive of the first working tool around the first working axis with respect to the satellite carrier, the first coupler being arranged opposite the reception area;a first drive gear which has as its axis the first working axis, which is rotationally fixed to the first drive satellite, and which cooperates with an internal toothing of a peripheral ring having the central axis as an axis of symmetry in order to, during a differential rotation of the satellite carrier with respect to the peripheral ring, cause a rotation of the first drive satellite on itself around the first working axis;◊ a second drive satellite, separate from the first drive satellite and mounted for free rotation on the satellite carrier around a second working axis, parallel to the central axis and eccentric with respect to the central axis while being separate from the first working axis, the second drive satellite comprising: a second coupler configured to allow coupling and uncoupling of a second working tool and to ensure the rotational drive of the second working tool around the second working axis with respect to the satellite carrier, the second coupler being arranged opposite the receiving area; a second drive gear which has as its axis the second working axis and which is rotationally fixed to the second drive satellite.

[0012] The food preparation appliance is of the type in which, for a given rotation speed of the satellite carrier, the first drive satellite and the second drive satellite rotate around their respective working axes at rotation speeds that are different from each other in absolute value.

[0013] The food preparation appliance is characterized in that the second drive gear cooperates with the first drive gear in such a way that the first drive gear drives the second drive gear and the second drive satellite in rotation about themselves around the second working axis, in that the peripheral ring, the first drive gear and the second drive gear are coplanar, and in that the first coupler and the second coupler respectively have a first and second working tool coupling geometry which are different from each other.

[0014] The food preparation appliance may also include one or more of the following characteristics, taken alone or in combination.

[0015] In some embodiments, the second drive satellite rotates around the second working axis at a rotational speed whose absolute value is greater than the absolute value of the rotational speed of the first drive satellite around the first working axis, for example between 1.1 and 2.0 times the rotational speed of the first drive satellite around the first working axis.

[0016] In some embodiments, the first drive gear meshes directly with the peripheral ring gear, without an intermediate mechanical element.

[0017] In some embodiments, the second drive gear meshes directly with the first drive gear without an intermediate mechanical element.

[0018] In some embodiments, the second drive gear cooperates with the first drive gear indirectly, through at least one intermediate drive gear, mounted freely for rotation on the planet carrier, such that the first drive gear drives the second drive gear and the second drive planet in rotation about themselves around the second working axis, through the at least one intermediate drive gear.

[0019] In some embodiments, the second drive gear cooperates with the first drive gear indirectly, through a single intermediate transmission gear, the single intermediate transmission gear meshing directly with the first drive gear and, simultaneously, meshing directly with the second drive gear.

[0020] In some embodiments, the second drive gear has a different number of teeth than the first drive gear.

[0021] In some embodiments, the second drive gear has fewer teeth than the first drive gear such that, for a given speed of the planet carrier, the second drive planet rotates around the second working axis at a rotational speed whose absolute value is greater than the absolute value of the rotational speed of the first drive planet around the first working axis.

[0022] In certain embodiments, the first drive gear, and at least one intermediate transmission gear when present, have a single external tooth profile. Thus, in the absence of an intermediate transmission gear, the single external tooth profile of the first drive gear is driven by the peripheral ring gear and drives the second drive gear. Conversely, when at least one intermediate transmission gear is present, the single external tooth profile of the first drive gear is driven by the peripheral ring gear and drives one or more of the intermediate transmission gears. When only one intermediate transmission gear is present, the external tooth profile of the intermediate transmission gear is driven by the peripheral ring gear and drives the second drive gear.When several intermediate drive wheels are present, the external teeth of each intermediate drive wheel are driven by the first drive gear or by another intermediate drive wheel, and drive the second drive gear or another intermediate drive wheel.

[0023] In some embodiments, the peripheral ring is a toothed ring which has a single internal toothing, the first drive gear is a toothed wheel having a single external toothing which meshes directly with the internal toothing of the peripheral ring, and the second drive gear has an external toothing which meshes directly with the external toothing of the first drive gear.

[0024] In some embodiments, the first working axis and the second working axis have the same eccentricity with respect to the central axis.

[0025] The invention also relates to a food preparation appliance system comprising: ▪ a food preparation appliance having any of the preceding characteristics; ▪ a first working tool configured to allow its coupling to the first coupler of the food preparation appliance; ▪ a second working tool configured to allow its coupling to the second coupler of the food preparation appliance.

[0026] In such a food preparation appliance system, the first working tool can be configured to prohibit its coupling to the second coupler and / or the second working tool can be configured to prohibit its coupling to the first coupler.

[0027] In such a food preparation appliance system, the first coupler can be configured to prohibit the coupling of the second working tool and / or the second coupler can be configured to prohibit the coupling of the first working tool.

[0028] Such a food preparation appliance system can be configured to prevent the simultaneous mounting of one work tool on the first coupler and another work tool on the second coupler. Brief description of the drawings

[0029] [ Fig. 1 ] There figure 1is a general schematic perspective view of a food preparation appliance in which the invention can be implemented. [ Fig. 2 ] There figure 2 is a schematic side view, partial, of a part of a food preparation appliance in which the invention can be implemented. [ Fig. 3 ] There figure 3 is a schematic perspective view, partial, of part of a food preparation appliance comprising two couplers for two working tools. [ Fig. 4 ] There figure 4 is a schematic perspective view illustrating a peripheral ring and a satellite carrier with two drive satellites, according to a first embodiment of the invention. [ Fig. 5 ] There figure 5 is a schematic exploded perspective view illustrating a satellite carrier with two training satellites, analogous to that of the Fig. 4 . [ Fig. 6 ]. There figure 6 is a schematic top view of the elements of the Fig. 4 . [ Fig. 7 ]. There figure 7 is a view analogous to those of the Fig. 4 , illustrating a second embodiment of the invention. [ Fig. 8 ]. There figure 8 is a view analogous to those of the Fig. 5 , illustrating the second embodiment of the invention. [ Fig. 9 ]. There figure 9 is a view analogous to those of the Fig. 6 , illustrating the second embodiment of the invention. Description of the implementation methods

[0030] THE Figs. 1 to 3 represent a kitchen preparation appliance system 10 including, on the one hand, a food preparation appliance 12, of the stand mixer type, and on the other hand a primary working tool 14.1and a second working tool 14.2 intended to be mounted on the food preparation appliance 12 to act on food during culinary preparation. In the examples that follow, the first working tool 14.1 is, for example, a kneading tool, while the second working tool 14.2 is, for example, a whip. In general, the first working tool 14.1 and the second working tool 14.2 These are two different types of working tools, with different geometries, particularly in terms of their active surfaces, which are designed to act on food during the culinary preparation for which they are intended. These two tools are preferably designed to operate optimally at different rotational speeds around their working axis.

[0031] The kitchen appliance 12 includes a base 15, here in the shape of a foot, comprising a base 16 roughly horizontal and a jamb 18 which extends vertically upwards from the base 16. The base 15 is designed to rest on a horizontal work surface. The base 16 includes a reception area 17 configured to receive a work container 20, here in the form of a tank, usually removable. The working container 20 for example, it is mounted in a removable manner on the reception area 17 of the base 16 via a bayonet fitting. The kitchen appliance 12 also includes a head 22 which, in this example, is articulated on the base 15 around a horizontal axis A0, here at the level of the jamb 18. In cases where the head 22is articulated around the horizontal axis A0, it can be mobile between a raised position, not shown, in which the working container 20 can be easily removed from the base 16, and a working position, illustrated in particular on the Fig. 1 . The terms "horizontal," "vertical," "up," and "down," and the related orientations, refer to the normal orientations of the food preparation appliance. 12 in operating condition when the base 15 is placed on a horizontal work surface, and correspond to the representation of the figures.

[0032] The head 22 of the kitchen appliance 12 presents a shape that extends along a longitudinal direction, horizontal in the working position, with a rear longitudinal portion by which it is connected to the leg 18of the base 15, and a longitudinal front section that extends overhanging above the base 16 and the working container 20. The head 22 may contain an engine 30, preferably an electric motor, illustrated on the Fig. 2 , whose start-up and speed can be controlled, for example, by a control button 24 arranged, for example, on a side face of the jamb 18. The engine 30 arranged inside the head 22 It includes a drive shaft oriented along a drive axis which, depending on the design, can be horizontal or vertical. Alternatively, the motor 30 can notably be arranged in the base 15.

[0033] In a manner known in itself, the front longitudinal portion of the head 22 includes a satellite carrier 26 including means for training a first working tool14.1, and even a second working tool 14.2, according to a planetary movement. For this purpose, the satellite carrier 26 is mobile in rotation around a central axis AC. In the illustrated examples, the central axis AC is fixed in relation to the head 22. The satellite carrier 26 is driven by the engine 30 via a kinematic chain 25 according to a concept widely known to those skilled in the art. Each of the first working tools 14.1 and second working tool 14.2 is intended to be mounted on the satellite carrier 26 to be drawn into a working movement by the satellite carrier 26. In working position, the first working tool 14.1 or the second working tool 14.2 mounted on the satellite carrier 26 is engaged inside the working container 20to act on food contained in the work container 20.

[0034] In the illustrated examples, the satellite carrier 26 is made in the form of a disc-shaped plate. The satellite carrier 26 is mounted securely to the lower end of a drive shaft 27 whose axis is the central axis AC. The drive shaft 27 is received in the head 22 and is guided inside the head 22, rotating around the central axis AC. The training tree 27 carries a drive wheel 29 which is part of the cinematic chain 25 by which the satellite carrier 26 is driven by the engine 30. Here, the drive wheel 29 is arranged on an upper portion of the drive shaft 27which extends, for example, above an internal horizontal wall (not shown) through which the drive shaft 27 the satellite carrier can be guided in rotation.

[0035] The satellite carrier 26 carries a first training satellite 28.1 which is mounted for free rotation on the satellite carrier 26 around a first area of ​​work A1, parallel to the central axis AC and off-center with respect to the central axis AC.

[0036] In the illustrated examples, as can be seen in particular on the Figs. 5 And 8 , the first training satellite 28.1 includes a stem 31.1 which extends along the first line of work A1 and which is mounted to rotate through the disc-shaped plate that forms the satellite carrier 26. The first training satellite 28.1thus includes a lower portion that protrudes below the underside of the satellite carrier 26, therefore in relation to the reception area 17, and an upper portion that extends above an upper face of the satellite carrier 26. In the illustrated examples, the upper portion of the first training satellite 28.1 therefore extends into a protected volume, above the satellite carrier 26, which can be considered as being included in the head 22.

[0037] The first training satellite 28.1 includes a first coupler 30.1 configured to allow coupling and uncoupling of the first working tool 14.1 on the first training satellite 28.1, in a working configuration, and to ensure the rotational drive of the first working tool 14.1 around the first area of ​​work A1compared to the satellite carrier 26. The first coupler 30.1 is arranged opposite the reception area 17. In the illustrated examples, the first coupler 30.1 is arranged at the lower end of the stem 31.1 of the first training satellite 28.1, so below the satellite carrier 26.

[0038] The first training satellite 28.1 also includes a first drive gear 32.1 which has as its axis the first working axis A1, and which is rotationally fixed to the first drive satellite 28.1. In the examples, this results from the fact that it is mounted as a fixed unit to its stem. 31.1. As is well known, the first drive gear 32.1 cooperates with an internal dentition of a peripheral crown 34 having the central axis AC as the axis of symmetry for, during a differential rotation of the satellite carrier26 compared to the peripheral crown 34, cause the first training satellite to rotate 28.1 on himself around the first axis of work A1.

[0039] In the illustrated examples, the first drive gear 32.1 directly engages with the internal teeth of the peripheral crown 34, therefore without an intermediate mechanical element. However, one could foresee that the first drive gear 32.1 cooperates indirectly with the internal dentition of the peripheral crown 34, for example via an intermediate gear.

[0040] In the illustrated examples, the peripheral crown 34 is fixed in relation to the head 22, but we could predict that the peripheral crown 34 either driven in rotation around the central axis AC in relation to the head 22,particularly in a direction opposite to the direction of rotation of the satellite carrier 26 around the central axis AC.

[0041] In the illustrated examples, the first drive gear 32.1 is supported by the upper portion of the first training satellite 28.1. It is therefore positioned above the satellite carrier. 26, in this case above the disc-shaped plate. The first drive gear 32.1 is therefore received in a protected volume, above the satellite carrier 26, and is not apparent from the outside of the food preparation appliance 12.

[0042] In the illustrated examples, the peripheral crown 34 is carried by the head 22 and it is fixed in relation to the head 22. It is positioned directly above the satellite carrier. 26,in this case, in the protected area above the satellite carrier 26. In the illustrated examples, the peripheral crown 34 has roughly the same dimensions as the satellite carrier 26 along a direction diametrical to the central axis AC.

[0043] The satellite carrier 26 carries a second training satellite 28.2, distinct from the first training satellite 28.1. This second training satellite 28.2 is also mounted for free rotation on the satellite carrier 26 around a second area of ​​work A2, also parallel to the central axis AC and off-center with respect to the central axis AC. The second area of ​​work A2 is distinct from the first line of work A1.

[0044] In the illustrated examples, the second training satellite 28.2 includes a stem 31.2which extends along the second line of work A2 and which is mounted to rotate through the disc-shaped plate that forms the satellite carrier 26. The second training satellite 28.2 thus includes a lower portion that protrudes below the underside of the satellite carrier 26, therefore in relation to the reception area 17, and an upper portion that extends above an upper face of the satellite carrier 26. In the illustrated examples, the upper portion of the second training satellite 28.2 therefore extends within the same protected volume as the upper portion of the first training satellite 28.1, above the satellite carrier 26.

[0045] Similar to the first training satellite 28.1, the second training satellite 28.2 includes a coupler, here called the second coupler 30.2,which is configured to allow coupling and uncoupling of a second working tool 14.2 on the second training satellite 28.2, in a working configuration, and to ensure the rotational drive of the second working tool 14.2 around the second area of ​​work A2 compared to the satellite carrier 26. The second coupler 30.2 is arranged opposite the reception area 17. In the illustrated examples, the second coupler 30.2 is also arranged at the lower end of the stem 31.2 of the second training satellite 28.2, so below the satellite carrier 26.

[0046] Similarly, the second training satellite 28.2 includes a second drive gear 32.2 which has as its axis the second working axis A2 and which is rotationally fixed to the second drive satellite 28.2.In the examples, this results from the fact that it is mounted as a fixed unit to its stem. 31.2.

[0047] As can be seen on the Figs. 4 to 9 , the second drive gear 32.2 cooperates, directly or through at least one intermediate transmission wheel 40, with the first drive gear 32.1, such that the first drive gear 32.1 drives the second drive gear 32.2 and the second training satellite 28.2 rotating on themselves around the second working axis A2.

[0048] We therefore note that the second drive gear 32.2 does not cooperate directly with the peripheral crown 34, in the sense that it is not directly meshed with the teeth of the peripheral crown 34.This cascading drive simplifies construction and, in particular, reduces the geometric tolerances of parts and assemblies. Indeed, the first drive gear 32.1 and the second drive gear 32.2 are supported by the same part, namely the satellite carrier 26, while each being mounted to rotate independently of the other on this satellite carrier 26. The tolerance chains required to achieve cooperation ensuring one drives the other are relatively short, and therefore can be easily met during manufacturing and assembly without the need for costly design and implementation precautions. In contrast, direct engagement between the peripheral ring gear is more complex. 34 and the first drive gear 32.1 is more complex to achieve because it involves the satellite carrier26 which is a moving (rotating) part both relative to the peripheral ring 34 and in relation to the first drive gear 32.1. The required tolerance chain is therefore longer, implying more manufacturing and assembly constraints, and thus inevitably a higher production cost. This longer tolerance chain is therefore not reflected in the second drive gear. 32.2.

[0049] Furthermore, the peripheral crown 34, the first drive gear 32.1, the second drive gear 32.2 are coplanar, which is particularly apparent on the Figs. 4 And 7 . For embodiment examples without an intermediate transmission wheel 40, the peripheral crown 34, the first drive gear 32.1, and the second drive gear 32.2are coplanar, as represented in particular on the Fig. 4 This allows you to obtain a kitchen appliance. 12 particularly compact, especially along the central axis AC. For the purposes of this application, this condition is met if there is a plane perpendicular to the central axis. AC which cuts the teeth of each of the peripheral crown 34, of the first drive gear 32.1, and the second drive gear 32.2. For embodiment examples including at least one intermediate transmission wheel 40, the peripheral crown 34, the first drive gear 32.1, said at least one intermediate transmission wheel 40, and the second drive gear 32.2 are coplanar, as represented in particular on the Fig. 7This allows you to obtain a kitchen appliance. 12 particularly compact, especially along the central axis AC. For the purposes of this application, this condition is met if there is a plane perpendicular to the central axis. AC which cuts the teeth of each of the peripheral crown 34, of the first drive gear 32.1, of said at least one intermediate transmission wheel 40, and the second drive gear 32.2. When several intermediate transmission wheels 40 are present, the central axis AC cuts the teeth of each of the intermediate transmission wheels 40.

[0050] Note that the peripheral crown 34, the first drive gear 32.1 and the second drive gear 32.2 are all arranged above the satellite carrier26.

[0051] In the examples, the first drive gear 32.1 and the second drive gear 32.2 are wheels with a cylindrical geometry around their respective axes A1, A2. Thus, each of them presents a tooth profile with an overall cylindrical geometry around their respective axes. A1, A2 Consequently, the geometry of the peripheral crown's teeth 34 is also a surface with an overall cylindrical geometry, this time around the central axis AC.

[0052] However, other complementary geometries could be considered. For example, the first drive gear could be 32.1 and the second drive gear 32.2 are wheels with conical geometry around their respective axes A1, A2, each presenting a conical toothing around their respective axes A1, A2.Furthermore, the teeth of the peripheral crown 34 In this case, it would also be a bevel gear, as well as that of the intermediate transmission wheel(s). 40 when present(s).

[0053] In the illustrated examples, the peripheral crown 34 is an annular toothed crown that has a single internal toothing. The first drive gear 32.1 is a gear comprising a single external toothed section which cooperates by direct meshing with the single internal toothed section of the peripheral ring 34. Furthermore, in the example of Figs. 4 to 6 , the second drive gear 32.2 It also features a single external toothing that meshes directly with the single external toothing of the first drive gear. 32.1. In the example of Figs. 7 to 9 , the intermediate transmission wheel 40It also features a single external toothing that meshes directly with the single external toothing of the first drive gear. 32.1, and the second drive gear 32.2 includes a unique external teeth that mesh directly with the single external teeth of the intermediate transmission wheel 40. The teeth of a crown or wheel are unique insofar as they are defined by a number of teeth with a unique tooth profile. A unique set of teeth on a crown or wheel may, for example, have an annular groove around the axis of said crown or wheel, the groove separating each tooth of the unique set into two parts successively along the direction of extension of the generating curve of the tooth.

[0054] In the illustrated examples, the teeth of the three components are straight teeth, with teeth whose generatrices are straight and parallel to the respective axes of the three components, which are themselves parallel to each other. However, it is possible to imagine that the teeth could be helical, herringbone, etc., regardless of whether the teeth are cylindrical or bevel.

[0055] In the examples, the second drive gear 32.2 is supported by the upper portion of the second training satellite 28.2. It is therefore positioned above the satellite carrier. 26, in this case above the disc-shaped plate. The second drive gear 32.2 is therefore received in the same protected volume as the first drive gear 32.1 and that the peripheral crown 34, above the satellite carrier 26,and is therefore not apparent from the outside of the food preparation appliance 12.

[0056] According to the invention, the food preparation appliance 12 is of the type in which, for a given speed of the satellite carrier 26, the first training satellite 28.1 and the second training satellite 28.2 revolve around their respective axes of work A1, A2, respectively at rotational speeds that are different from each other in absolute value. Preferably, for a given speed of the satellite carrier, the second driving satellite 28.2 revolves around the second area of ​​work A2, at a rotational speed greater in absolute value than the absolute value of the rotational speed of the first driving satellite 28.1 around the first area of ​​work A1. For example, the second drive gear 32.2,and therefore the second training satellite 28.2 revolve around the second axis of work A2, at a rotational speed whose absolute value is between 1.1 and 2.0 times the absolute value of the rotational speed of the first drive satellite around the first working axis A1. This is particularly advantageous because it allows the first working tool to be driven at a first working speed, or the second working tool at a second, different working speed, notably higher and, for example, between 1.1 and 2.0 times the first working speed, all with the same motor speed. 30,and with the same kinematic chain speed between the motor and the tool holder. Even more advantageous, given that the motor speed is generally limited by a minimum and a maximum value, the two different speeds of the two couplings allow for a wider, absolute range of values ​​for the working tools. Thus, the first coupling will be used for working tools requiring low speed and possibly high torque, and the second coupling will be used for working tools requiring high speed, possibly with lower torque.

[0057] In total, the food preparation appliance 12, the first working tool 14.1 and the second working tool 14.2 belong to the kitchen preparation appliance system 10which includes the food preparation appliance 12, at least one first working tool configured to allow its coupling to the first coupler of the food preparation appliance 12, and at least one second work tool configured to allow coupling to the second coupler of the food preparation appliance 12.

[0058] In a first embodiment, illustrated more particularly in Figs. 4 to 6 , the second drive gear 32.2 directly engages with the first drive gear 32.1, without an intermediate mechanical element, in particular without an intermediate gear. In this embodiment, the first drive gear 32.1 and the second drive gear 32.2 rotate around their respective axes A1, A2 in opposite directions of rotation.

[0059] In a second embodiment, illustrated more particularly in Figs. 7 to 9 , the second drive gear 32.2 cooperates with the first drive gear 32.1 indirectly, via an intermediate transmission wheel 40 The intermediate transmission wheel 40 is mounted freely for rotation on the satellite carrier 26, around an intermediate axis Ai which is parallel to the work axes A1 And A2 respectively of the first drive gear 32.1 and the second drive gear 32.2. Thus, the first drive gear 32.1 drives the second drive gear into rotation 32.2 and the second training satellite 28.2 rotating on themselves around the second working axis A2,via the intermediate transmission wheel 40. Preferably, as in the version illustrated on the Figs. 7 to 9 , the second drive gear 32.2 cooperates with the first drive gear 32.1 indirectly, via a single intermediate transmission wheel 40, the single intermediate transmission wheel 40 being an externally geared toothed wheel which simultaneously meshes directly with the first drive toothed wheel 32.1 and with the second drive gear 32.1. However, one could anticipate that the food preparation appliance 12It comprises several intermediate wheels arranged in a cascade between the first and second drive wheels, the intermediate wheels being externally geared wheels mounted freely for rotation on the planet carrier. The number of intermediate wheels in cascade is, for example, an odd number, with the consequence that the first drive wheel 32.1 and the second drive gear 32.2 revolve around their respective work axes A1, A2 in the same direction of rotation.

[0060] For embodiments comprising a single intermediate transmission wheel 40, and for those with multiple intermediate transmission wheels, the intermediate transmission wheel(s) 40 are coplanar with each other and coplanar with the peripheral crown 34, with the first drive gear 32.1and with the second drive gear 32.2. For the purposes of this application, this condition is met if there is a plane perpendicular to the central axis. AC which cuts the teeth of each of the peripheral crown 34, of the first drive gear 32.1, the second drive gear 32.2, and the intermediate transmission wheel(s) 40.

[0061] As illustrated in the illustrated embodiments, the second drive gear 32.2 has a different number of teeth, and therefore a different diameter, than the first drive gear 32.1, in this case a lower number of teeth. In embodiments where the second drive gear 32.2 and the first drive gear 32.1 directly meshes, or in which the second drive gear 32.2cooperates with the first drive gear 32.1 via a single intermediate transmission wheel 40, the ratio of the absolute values ​​of the rotational speeds between the second drive gear 32.2 and the first drive gear 32.1 is inversely proportional to the ratio of the number of teeth on the second drive gear 32.2 compared to the first drive gear 32.1.

[0062] In the illustrated examples, the first area of ​​work A1 and the second area of ​​work A2 exhibit the same eccentricity relative to the central axis AC. We can say that they are arranged on the same diameter, or that they are arranged at the same distance from the central axis. AC.This allows for comparable tool geometries for the first and second working tools, in relation to the container geometry. For this to work, it is important that the second drive gear 32.2 has a different number of teeth, and therefore a different diameter, than the first drive gear 32.1, because, even with working axes arranged with the same eccentricity relative to the central axis AC, We avoid any interference between the second drive gear 32.2 and the teeth of the peripheral crown 34.

[0063] However, one could anticipate that the first area of ​​work A1 and the second area of ​​work A2 exhibit a different eccentricity, relative to the central axis AC, with, for example, a second line of work A2 having an eccentricity less than that of the first working axisA1 relative to the axis AC. With such an arrangement, it becomes possible to have a second working tool for the same work container. 14.2 having a larger diameter, resulting in a higher tangential speed of the working tool for the same rotational speed around the second working axis A2.

[0064] In some embodiments not part of the invention, the first coupler 30.1 and the second coupler 30.2 may have the same tool coupling geometry. In this case, it is conceivable that the same tool could be mounted interchangeably on the first coupler. 30.1, so on the first training satellite 28.1 or on the second coupler 30.2, so on the second training satellite 28.2.

[0065] The first coupler 30.1 and the second coupler 30.2respectively present a first and second tool coupling geometry which are different from each other.

[0066] Indeed, different coupling geometries between a work tool and a food preparation appliance are known. 12.A coupling geometry defines a coupling mechanism whose role is to secure the working tool to the drive sprocket in a way that allows the tool to perform the food preparation task for which it is designed. Typically, the coupling geometry allows the working tool to be locked to the coupling in all directions. For example, coupling geometries defining a bayonet-type coupling mechanism are known. There are also coupling geometries defining a coupling mechanism with a rod with a flat, a toothed rod, or a rod with one or more radial protrusions, forming part of either the working tool or the coupling, and a bore of complementary shape on the other part of the working tool and the coupling.Generally, the coupling geometry defines a coupling mechanism that allows manual coupling and uncoupling of the working tool onto the coupler, thus without requiring the use of tools to achieve the coupling.

[0067] By having different coupling geometries on the one hand for the first coupler 30.1 and the first working tool 14.1 and on the other hand for the second coupler 30.2 and the second working tool 14.2, The coupling geometry can be adapted to the respective work intended for these two working tools, and in particular to the couple of forces which are applied to the working tool, therefore to the coupler, during the work.

[0068] In particular, it is advantageous to foresee that the first coupler 30.1 be configured to prevent the coupling of the second working tool 14.2 and / or in that the second coupler 30.2be configured to prevent the coupling of the first working tool 14.1. Note that it is possible to prevent the assembly of the first working tool. 14.1 on the second coupler 30.2 without necessarily prohibiting the assembly of the second working tool 14.2 on the first coupler 30.1, or vice versa.

[0069] Advantageously, the food preparation appliance system 10 can be configured to prevent simultaneous mounting of the first working tool 14.1 on the first coupler 30.1 and the second working tool 14.2 on the second coupler 30.2. For example, such a food preparation appliance system 10It may include a cover that would be movable on the satellite carrier between two positions: one in which it would allow access to the first coupler and prevent access to the second coupler, and the other in which it would allow access to the second coupler and prevent access to the first coupler. As a complement or alternative, such a food preparation appliance system 10 could include a cover that would be linked to a work tool and that, when this work tool is coupled to the corresponding coupler, would prevent access to the other coupler.

[0070] Preferably, the first area of ​​work A1 and the second area of ​​work A2 are spaced apart from each other around the central axis ACof an angle less than or equal to 180 degrees, preferably less than or equal to 120 degrees, and even more preferably less than or equal to 90 degrees. In the first example shown, in which the second drive gear 32.2 directly engages with the first drive gear 32.1, without an intermediate mechanical element, the first working axis A1 and the second area of ​​work A2 are spaced apart from each other around the central axis AC of an angle strictly less than or equal to 45 degrees. In the second example shown, in which the second drive gear 32.2 cooperates indirectly with the first drive gear 32.1 via an intermediate transmission wheel 40, the first area of ​​work A1 and the second area of ​​work A2are spaced apart from each other around the central axis AC of an angle within the range of 45 degrees to 90 degrees.

[0071] For embodiments comprising a single intermediate transmission wheel 40, or several, the intermediate transmission wheel 40 can be arranged in such a way that its axis of rotation Ai it also exhibits the same eccentricity relative to the central axis AC that the first area of ​​work A1 and that the second area of ​​work A2, such as in the implementation of Figs. 7 to 9 . However, the axis of rotation Ai could have a different eccentricity than either of these axes, or even different from both of these axes. For example, one could expect the intermediate transmission wheel 40 be arranged in such a way that its axis of rotation Aipresent, in relation to the central axis AC, an eccentricity less than that of the first working axis A1, and possibly also lower than that second line of work A2. With an intermediate transmission wheel arrangement 40 radially inwards relative to the first drive gear 32.1 and in relation to the second drive gear 32.2, For wheels of identical diameters, the first drive gear can be brought closer together angularly. 32.1 and the second drive gear 32.2, with a reduced angular spacing between the first working axis A1 and the second area of ​​work A2 around the central axis AC, this angular separation can then be less than 45 degrees of angle.

[0072] By grouping the two couplers in the same angular sector of the satellite carrier 26,for example with an angular spacing between the first working axis A1 and the second area of ​​work A2 around the central axis AC which is less than 90 degrees of angle, or even less than 45 degrees of angle, they can be arranged in the same reinforced sector of the satellite carrier 26.

[0073] The invention makes it possible to create a food preparation appliance comprising two output couplers, which can notably have different rotation speeds, by simply changing the planetary carrier. 26, without further modifications to an existing device comprising a single output coupler on its planet carrier. Indeed, in both cases, the planet carrier has a single drive gear that meshes directly with the peripheral ring.

Claims

1. Electric household apparatus for food preparation (12), having: - a baseplate (15) having a base (16) having a receiving zone (17) configured to receive a working container (20); - a head (22) connected to the baseplate (15), the head (22) having a planet wheel carrier (26) which is rotated about a central axis (AC) by a motor (30), and which carries: - a first drive planet wheel (28.1), mounted in free rotation on the planet wheel carrier (26) about a first working axis (A1), parallel to the central axis (AC) and off-centre with respect to the central axis (AC), the first drive planet wheel (28.1) having: - a first coupler (30.1) configured to enable a coupling and an uncoupling of a first working tool (14.1) and to ensure the rotation of the first working tool (14.1) about the first working axis (A1) with respect to the planet wheel carrier (26), the first coupler (30.1) being arranged facing the receiving zone (17); - a first toothed drive wheel (32.1) which has for the axis, the first working axis (A1), which rotates integrally with the first drive planet wheel (28.1), and which cooperates with an internal toothing of a peripheral ring (34) having the central axis (AC) as the axis of symmetry to, during a differential rotation of the planet wheel carrier (26) with respect to the peripheral ring (34), cause a rotation of the first drive planet wheel (28.1) on itself about the first working axis (A1); - a second drive planet wheel (28.2), distinct from the first drive planet wheel (28.1) and mounted in free rotation on the planet wheel carrier (26) about a second working axis (A2), parallel to the central axis (AC) and off-centre with respect to the central axis (AC) while being distinct from the first working axis (A1), the second drive planet wheel (28.2) having: - a second coupler (30.2) configured to enable a coupling and an uncoupling of a second working tool (14.2) and to ensure the rotation of the second working tool (14.2) about the second working axis (A2) with respect to the planet wheel carrier (26), the second coupler (30.2) being arranged facing the receiving zone (17); - a second toothed drive wheel (32.2) which has for the axis, the second working axis (A2) and which rotates integrally with the second drive planet wheel (28.2); the electric household apparatus (12) for food preparation being of the type in which, for a given rotation speed of the planet wheel carrier (26), the first drive planet wheel (28.1) and the second drive planet wheel (28.2) rotate around their respective working axes (A1, A2) at rotation speeds that differ from one another in absolute value; the second toothed drive wheel (32.2) cooperating with the first toothed drive wheel (32.1) such that the first toothed drive wheel (32.1) rotates the second toothed drive wheel (32.2) and the second drive planet wheel (28.2) on themselves about the second working axis (A2), characterised in that the peripheral ring (34), the first toothed drive wheel (32.1) and the second toothed drive wheel (32.2) are coplanar, and in that the first coupler (30.1) and the second coupler (30.2) respectively have a first and a second working tool coupling geometry which are different from one another.

2. Electric household apparatus (12) for food preparation according to claim 1, characterised in that the second drive planet wheel (28.2) rotates about the second working axis (A2) at a rotation speed whose absolute value is greater than the absolute value of the rotation speed of the first drive planet wheel (28.1) about the first working axis (A1), for example between 1.1 and 2.0 times the rotation speed of the first drive planet wheel (28.1) about the first working axis (A1).

3. Electric household apparatus (12) for food preparation according to any one of claims 1 or 2, characterised in that the first toothed drive wheel (32.1) meshes directly with the peripheral ring (34), without any intermediate mechanical element.

4. Electric household apparatus (12) for food preparation according to any one of claims 1 to 3, characterised in that the second toothed drive wheel (32.2) meshes directly with the first toothed drive wheel (32.1), without any intermediate mechanical element.

5. Electric household apparatus (12) for food preparation according to any one of claims 1 to 3, characterised in that the second toothed drive wheel (32.2) cooperates with the first toothed drive wheel (32.1) indirectly, through at least one intermediate transmission wheel (40), mounted free in rotation on the planet wheel carrier (36), such that the first toothed drive wheel (32.1) rotates the second toothed drive wheel (32.2) and the second drive planet wheel (28.2) on themselves about the second working axis (A2), through the at least one intermediate transmission wheel (40).

6. Electric household apparatus (12) for food preparation according to claim 5, characterised in that the second toothed drive wheel (32.2) cooperates with the first toothed drive wheel (32.1) indirectly, through one single intermediate transmission wheel (40), the single intermediate transmission wheel (40) meshing directly with the first toothed drive wheel (32.1) and, simultaneously, meshing directly with the second toothed drive wheel (32.2).

7. Electric household apparatus (12) for food preparation according to any one of claims 1 to 6, characterised in that the second toothed drive wheel (32.2) has a number of teeth different from that of the first toothed drive wheel (32.1).

8. Electric household apparatus (12) for food preparation according to any one of claims 1 to 7, characterised in that the second toothed drive wheel (32.2) has a number of teeth less than that of the first toothed drive wheel (32.1), such that, for a given speed of the planet wheel carrier (26), the second drive planet wheel (28.2) rotates, about the second working axis (A2), at a rotation speed, the absolute value of which is greater than the absolute value of the rotation speed of the first drive planet wheel (28.1) about the first working axis (A1).

9. Electric household apparatus (12) for food preparation according to any one of claims 1 to 8, characterised in that the first toothed drive wheel (32.1), and, when present, said at least one intermediate transmission wheel (40), has / have a single external toothing.

10. Electric household apparatus (12) for food preparation according to any one of claims 1 to 9, characterised in that the first working axis (A1) and the second working axis (A2) have the same off-centring with respect to the central axis (AC).

11. Electric household system (10) for food preparation comprising: - an electric household apparatus (12) for food preparation according to any one of claims 1 to 10; - a first working tool (14.1) configured to enable its coupling on the first coupler (30.1) of the electric household apparatus for food preparation (12); - a second working tool (14.2) configured to enable its coupling on the second coupler (30.2) of the electric household apparatus (12) for food preparation.

12. Electric household system (10) for food preparation according to claim 11, characterised in that the first working tool (14.1) is configured to prohibit its coupling on the second coupler (30.2).

13. Electric household system (10) for food preparation according to any one of claims 11 or 12, characterised in that the second working tool (14.2) is configured to prohibit its coupling on the first coupler (30.1).

14. Electric household system (10) for food preparation according to any one of claims 11 to 13, characterised in that the first coupler (30.1) is configured to prohibit the coupling of the second working tool (14.2) and / or in that the second coupler (30.2) is configured to prohibit the coupling of the first working tool (14.1).