Magnet yoke, motor rotor, driving motor and cleaning equipment

Abstract

The utility model relates to a magnet yoke, a motor rotor, a driving motor and cleaning equipment, the magnet yoke comprises multiple layers of circular rings formed by encircling a metal belt, the multiple layers of circular rings are nested, when the metal belt is in a tiled state, in the extension direction of the metal belt, the metal belt comprises multiple segments of metal sheets which are connected in sequence, and the metal sheets are arranged in the multiple segments of metal sheets. A step structure is arranged at the joint of every two adjacent metal sheets, each section of metal sheet surrounds to form a layer of circular ring, and the head part and the tail part of each section of metal sheet are connected through the step structure. According to the magnet yoke, the multiple sections of metal belts are sequentially connected, the step structures are arranged at the joints of every two adjacent sections of metal belts, the head and the tail of each section of metal belt are connected through the corresponding step structure to form a layer of circular ring of the magnet yoke, the distances between the head and the tail of each metal belt and the circle center of the magnet yoke are equal through the step structures, and the multiple layers of circular rings of the magnet yoke are all the whole circles. Therefore, noise and friction generated by rotation of the magnet yoke can be reduced or avoided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of cleaning equipment, and in particular to a magnetic yoke, a motor rotor, a drive motor and a cleaning equipment. Background Art

[0002] Direct drive motors (also known as DD motors) are usually used as power devices in electrical appliances such as washing machines. A yoke is provided on the rotor of the DD motor to fix the magnetic poles and generate rotational inertia.

[0003] In the related art, the yoke formed by winding the steel sheets is not a full circle, which results in an uneven air gap between the stator and the rotor of the motor, affecting the performance of the motor. Utility Model Content

[0004] In order to overcome the problems existing in the related art, the present disclosure provides a yoke, an electronic rotor, a drive motor and a cleaning device.

[0005] In a first aspect of the present disclosure, a yoke is provided, the yoke comprising a plurality of layers of circular rings surrounded by metal strips, the plurality of layers of circular rings being coaxially nested;

[0006] When the metal belt is in a flat state, in the extension direction of the metal belt, the metal belt includes a plurality of metal sheets connected in sequence, and a step structure is provided at the connection between two adjacent metal sheets;

[0007] Each section of the metal sheet surrounds and forms a layer of the circular ring, and the head and tail of each section of the metal sheet are connected via the step structure.

[0008] In some embodiments, in the radial direction of the yoke, the height of the step structure is equal to the thickness of the metal sheet.

[0009] In some embodiments, the multi-segment metal sheet includes a first type of metal sheet and a second type of metal sheet, and in the thickness direction of the metal sheet, a locking protrusion protruding from the first type of metal sheet is provided on the surface of the first type of metal sheet, and a locking through hole penetrating the second type of metal sheet is provided on the second type of metal sheet;

[0010] In the radial direction of the yoke, the locking protrusion extends into the locking through hole.

[0011] In some embodiments, when the metal strip is in a flat state, in the extension direction of the metal strip, the first type of metal sheet is arranged at the end of the metal strip, and the locking protrusion is arranged at the end of the first type of metal sheet away from the other metal sheets.

[0012] In some embodiments, the locking protrusion comprises:

[0013] A protruding body, the protruding body is connected to the metal sheet, and the protruding body passes through the locking through hole;

[0014] The bent section is connected to an end of the protruding body away from the metal sheet, and the bent section is perpendicular to an extending direction of the protruding body.

[0015] In some embodiments, each of the metal sheets is provided with a protrusion and a recess, and the protrusion on each of the metal sheets extends into the recess of the metal sheet adjacent to it in the radial direction of the yoke.

[0016] According to a second aspect of the present disclosure, a motor rotor is provided, comprising a plurality of magnets and a yoke as described in the first aspect, wherein the plurality of magnets are arranged on an inner wall of the yoke and are evenly distributed along a circumferential direction of the yoke.

[0017] In some embodiments, the motor rotor further includes a plastic-coated portion, and the plastic-coated portion is disposed on the inner side wall of the yoke;

[0018] There is a gap space between adjacent magnets and the protrusion or recess of the yoke is exposed, and the overmolding portion fills the gap space and is connected to the protrusion or recess.

[0019] A third aspect of the present disclosure provides a drive motor, comprising a stator and a motor rotor as described in the second aspect.

[0020] A fourth aspect of the present disclosure provides a cleaning device, comprising the driving motor as described in the third aspect.

[0021] In some embodiments, the cleaning device comprises a washing machine.

[0022] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: multiple sections of metal belts are connected in sequence and a step structure is provided at the connection between two adjacent sections of the metal belts, the head and tail of each section of the metal sheet are connected through the step structure to form a layer of circular ring of the yoke, the step structure makes the distance between the head and tail of the metal sheet and the center of the yoke equal, and the multiple layers of circular rings of the yoke are all full circles, thereby reducing or avoiding noise and friction generated by the rotation of the yoke.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0025] Figure 1 is a schematic diagram showing a metal strip in a flat state according to an exemplary embodiment.

[0026] Figure 2 yes Figure 1 Magnified view of area A.

[0027] Figure 3 is a schematic diagram of a motor rotor according to an exemplary embodiment.

[0028] Figure 4 yes Figure 3 Magnified view of area B.

[0029] Figure 5 is a schematic diagram of a motor rotor according to an exemplary embodiment.

[0030] Figure 6 yes Figure 5 Magnified view of area C.

[0031] Figure 7 yes Figure 5 Magnified view of area D in the middle.

[0032] Figure 8 is a schematic axial cross-sectional view of a magnetic yoke according to an exemplary embodiment. DETAILED DESCRIPTION

[0033] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0034] Direct drive motors (also known as DD motors) are usually used as power devices in electrical appliances such as washing machines. A yoke is provided on the rotor of the DD motor to fix the magnetic poles and generate rotational inertia.

[0035] In the related art, when the stamped steel sheet is wound to form a ring-shaped yoke, there is a difference in thickness between the starting position and the end position of the steel sheet, that is, the ring-shaped yoke formed by winding is not a full circle, and the concentricity of multiple rings in the yoke is not high, which may cause friction between the rotor and stator of the motor. In addition, it will also cause the air gap between the stator and rotor of the motor to be uneven, causing the motor to emit order noise when working, affecting the user experience.

[0036] There is also a method in the related art in which a galvanized sheet is punched into an integrated disc structure, and the disc structure and the magnetic steel are simultaneously placed in a plastic mold and packaged into a whole. This solution requires a lot of steel and results in high costs.

[0037] In order to solve the above problems, the embodiments of the present disclosure provide a yoke, a motor rotor, a drive motor and a cleaning device. The yoke includes a multi-layer circular ring formed by a metal belt, and the multi-layer circular ring is nested. When the metal belt is in a flat state, in the extension direction of the metal belt, the metal belt includes a plurality of metal sheets connected in sequence, and a step structure is provided at the connection between two adjacent metal sheets. Each metal sheet is surrounded to form a layer of circular ring, and the head and tail of each metal sheet are connected through the step structure. In the present disclosure, multiple sections of metal belts are connected in sequence and a step structure is provided at the connection between two adjacent sections of metal belts. The head and tail of each metal sheet are connected through the step structure to form a layer of circular ring of the yoke. The step structure makes the distance between the head and tail of the metal sheet and the center of the yoke equal, and the multi-layer circular rings of the yoke are all full circles, so as to reduce or avoid the noise and friction generated by the rotation of the yoke.

[0038] According to an exemplary embodiment of the present disclosure, Figures 3 to 8 As shown, the embodiment of the present disclosure provides a yoke 100, which is applied to a motor rotor, and the motor rotor includes a magnet 200. The yoke 100 is used to fix the magnet 200 and generate a moment of inertia. The yoke 100 is usually made of silicon steel sheets, and the yoke 100 can be evenly and symmetrically distributed around the induction coil, which can restrict the diffusion of the leakage magnetic field of the induction coil, so that the induction coil is concentrated to enhance the magnetic force, thereby improving the ability of the drive motor to output torque.

[0039] like Figure 3 and Figure 4 As shown, the yoke 100 includes multiple layers of circular rings, which are coaxially nested. Each layer of circular rings is a full circle, that is, the distance between each position on each layer of circular rings and the axis of the yoke 100 is equal, ensuring that the yoke 100 has stability when rotating.

[0040] The yoke 100 provided in the embodiment of the present disclosure may be formed by surrounding a metal strip. Figure 1 and Figure 2 , showing a metal strip in a flat state, in the extension direction of the metal strip ( Figure 1 In the x direction shown in FIG, the metal belt includes a plurality of metal sheets 10 connected in sequence, and a step structure 20 is provided at the connection between two adjacent metal sheets 10. In one example, the thickness of the metal belt may be, for example, 0.45 mm to 0.55 mm.

[0041] In one example, the metal strip may be an integral structure, and a plurality of metal sheets 10 are formed by stamping, so that a step structure 20 is formed at the connection between two adjacent metal sheets 10, and the thickness of the plurality of metal sheets 10 is ( Figure 1 In another example, the metal strip can also be formed by welding multiple sections of metal sheets 10, and the thickness of the multiple sections of metal sheets 10 can be the same or different, by stacking adjacent metal sheets 10 ( Figure 1 By welding in the z direction (as shown in FIG. 1 ), a step structure 20 can be formed at the connection between adjacent metal sheets 10 .

[0042] like Figure 1 and Figure 4 As shown, each metal sheet 10 surrounds a layer of circular rings forming the yoke 100, and the head and tail of each metal sheet 10 are connected by a step structure 20. For example, referring to Figure 1 , the metal strip includes five metal sheets 10 connected in sequence, which can surround and form a yoke 100 with five circular rings. This does not limit the technical solution of the present disclosure, and the number of metal sheets 10 can be adaptively set according to actual needs, such as 2 sheets, 4 sheets or more sheets. Compared with the yoke 100 formed by winding the metal strip in the related art, the step structure 20 makes the distance between the head (the starting position of the winding) and the tail (the end position of the winding) of each section of the metal sheet 10 and the center of the yoke 100 equal, so that each circular ring is a full circle, and there will be no contact wear between the rotor and the stator when the rotor rotates, and no order noise will be emitted due to uneven air gap.

[0043] Continue to refer Figure 4 When the metal strip is wound around to form the yoke 100, adjacent rings are also connected by the step structure 20. It can be determined that the multi-layer rings of the yoke 100 provided by the embodiment of the present disclosure can be formed by winding a metal strip, and the yoke 100 has good integrity and high production efficiency.

[0044] The yoke provided in the embodiment of the present disclosure has multiple sections of metal strips connected in sequence and a step structure is provided at the connection between two adjacent sections of the metal strips. The head and tail of each metal sheet are connected through the step structure to form a layer of circular ring of the yoke. The step structure makes the distance between the head and tail of the metal sheet and the center of the yoke equal, and the multiple layers of circular rings of the yoke are all full circles, thereby reducing or avoiding noise and friction generated by the rotation of the yoke.

[0045] In an exemplary embodiment, Figures 3 to 8 As shown, the yoke 100 includes a plurality of rings formed by a metal belt, the plurality of rings are nested, and the metal belt is in a flat state (refer to Figure 1 ), in the extension direction of the metal strip ( Figure 1In the x direction shown in the figure, the metal strip includes a plurality of metal sheets 10 connected in sequence, a step structure 20 is provided at the connection between two adjacent metal sheets 10, each metal sheet 10 is surrounded to form a ring, and the head and tail of each metal sheet 10 are connected by the step structure 20.

[0046] like Figure 4 As shown, in the radial direction of the yoke 100, the height of the step structure 20 ( Figure 1 The z direction shown in FIG. 1 is equal to the thickness of the metal sheet 10. Figure 1 Taking the position shown as an example, the metal belt is an integrated structure, and the multiple metal sheets 10 are the first metal sheet 10a, the second metal sheet 10b, the third metal sheet 10c, the fourth metal sheet 10d and the fifth metal sheet 10e from left to right. The thickness of each metal sheet 10 is equal. The left end of the first metal sheet 10a is the head, and the right end of the first metal sheet 10a is the tail and the tail is connected to the step structure 20. Figure 1 and Figure 4 When the first metal sheet 10a is surrounded, it can form the innermost circular ring of the yoke 100. The head of the first metal sheet 10a is connected to the step structure 20 at its tail. Since the thickness of the first metal sheet 10a is equal to the height of the step structure 20, the inner wall and the outer wall of the innermost circular ring formed by the first metal sheet 10a are both closed curved surfaces. The closed inner wall of the innermost circular ring can ensure that the innermost circle of the yoke 100 is uniform, and the closed outer wall of the innermost circular ring can provide support for the sub-inner layer (that is, the circular ring formed by the second metal sheet 10b), so that there is no air gap between the innermost circular ring and the sub-inner circular ring. By analogy, the circular rings formed by the second metal sheet 10b to the fifth metal sheet 10e all have closed inner and outer wall surfaces, so that the multiple layers of circular rings of the yoke 100 are completely fitted.

[0047] The multi-segment metal sheet 10 can be divided into a first type metal sheet and a second type metal sheet. Figure 1 and Figure 2 The surface of the first type of metal sheet is provided with a locking protrusion 11, in the thickness direction of the metal sheet 10 ( Figure 1 In the z direction shown in FIG, the locking protrusion 11 protrudes from the surface of the first type metal sheet. The second type metal sheet is provided with a locking through hole 12, which passes through the second type metal sheet in the thickness direction of the metal sheet 10.

[0048] In one example, reference Figure 1 and Figure 2 , and combined with Figure 8The fifth metal sheet 10e is a first type metal sheet, and the four metal sheets 10 from the first metal sheet 10a to the fourth metal sheet 10d are all second type metal sheets. The locking protrusion 11 on the fifth metal sheet 10e passes through the locking through holes 12 on the fourth metal sheet 10d, the third metal sheet 10c, the second metal sheet 10b and the first metal sheet 10a in sequence. The locking protrusion 11 cooperates with the multiple locking through holes 12 to make the circular rings formed by the multiple metal sheets 10 fit together, so that the multi-layer circular rings of the yoke 100 form a reliable connection.

[0049] Continue to refer Figure 1 and Figure 2 , in the extension direction of the metal strip ( Figure 1 The first type of metal sheet is placed at the end of the metal strip. When the metal strip is wrapped around to form the yoke 100, the first type of metal sheet can form the innermost or outermost ring of the yoke 100, that is, the first type of metal sheet can be the first metal sheet 10a or the fifth metal sheet 10e. The locking protrusion 11 is provided at one end of the first type of metal sheet away from the other metal sheets 10, so that the locking protrusion 11 can limit the end of the first type of metal sheet to prevent the end of the first type of metal sheet from warping, and ensure that the metal strip is wrapped around to form the yoke 100 in a full circular shape.

[0050] In another example (not shown in the drawings), the first type of metal sheet may be a metal sheet 10 located in the middle of a metal strip, such as Figure 1 Any one of the second metal sheet 10b, the third metal sheet 10c and the fourth metal sheet 10d shown in . Exemplarily, taking the third metal sheet 10c as the first type of metal sheet as an example, when the metal belt is in a surrounding state, the first metal sheet 10a and the second metal sheet 10b are located radially inside the third metal sheet 10c, and the fourth metal sheet 10d and the fifth metal sheet 10e are located radially outside the third metal sheet 10c. To ensure that the rings formed by the first metal sheet 10a, the second metal sheet 10b, the fourth metal sheet 10d and the fifth metal sheet 10e are all locked, locking protrusions 11 can be provided on both surfaces of the third metal sheet 10c, wherein the locking protrusions 11 extending radially inside can cooperate with the locking through holes 12 on the first metal sheet 10a and the second metal sheet 10b to achieve locking, and the locking protrusions 11 extending radially outside can cooperate with the locking through holes 12 on the fourth metal sheet 10d and the fifth metal sheet 10e to achieve locking.

[0051] Among them, Figure 6 and Figure 8 As shown, the locking protrusion 11 includes a protrusion body 111 and a bent section 112. The protrusion body 111 is connected to the metal sheet 10. When the metal belt is surrounded to form a ring, the protrusion body 111 passes through the locking through hole 12 on the other metal sheet 10. Figure 8 , the bent section 112 is connected to the end of the protruding body 111 away from the metal sheet 10, and the extension direction of the bent section 112 is perpendicular to the extension direction of the protruding body 111, that is, the locking protrusion 11 is L-shaped. In the disclosed embodiment, the bent section 112 can be formed by bending the protruding body 111, and the bent section 112 can provide a locking force toward the radial outside to the innermost circular ring of the yoke 100, and can also provide a locking force toward the radial inside to the outermost circular ring, so that the multiple layers of circular rings of the yoke 100 are more reliably fitted together, thereby improving the structural reliability and roundness of the yoke 100.

[0052] In an exemplary embodiment, Figures 3 to 8 As shown, the yoke 100 includes a plurality of layers of circular rings formed by a metal belt, and the plurality of layers of circular rings are nested. When the metal belt is in a flat state, in the extension direction of the metal belt, the metal belt includes a plurality of sections of metal sheets 10 connected in sequence, and a step structure 20 is provided at the connection between two adjacent metal sheets 10. Each section of the metal sheet 10 is surrounded to form a layer of circular ring, and the head and tail of each section of the metal sheet 10 are connected by the step structure 20.

[0053] The yoke 100 provided in this embodiment may include any structure of the yoke 100 provided in the above embodiments.

[0054] like Figure 5 and Figure 6 As shown, each metal sheet 10 of the metal strip is provided with a raised portion 13 and a recessed portion 14, and the raised portion 13 and the recessed portion 14 both extend in the thickness direction of the metal sheet 10. It should be noted that in the thickness direction of the metal sheet 10, the raised portion 13 and the recessed portion 14 on each metal sheet 10 can be directly opposite or staggered. The raised portion 13 and the recessed portion 14 can be formed by a stamping process.

[0055] When the metal sheet 10 is wrapped around to form a ring, the raised portion 13 on the metal sheet 10 extends into the recessed portion 14 of the metal sheet 10 adjacent to it in the radial direction of the yoke 100, that is, in two adjacent layers of rings of the yoke 100, the raised portion 13 on one layer of the ring extends into the recessed portion 14 of the other layer of the ring. In the embodiment of the present disclosure, by providing the raised portion 13 and the recessed portion 14, it is possible to prevent the multiple layers of rings from relative movement in the circumferential direction, and to prevent the multiple layers of rings from being misaligned when the yoke 100 rotates.

[0056] According to an exemplary embodiment of the present disclosure, Figure 3 and Figure 4As shown, the embodiment of the present disclosure further provides a motor rotor, which includes a magnet 200 and a yoke 100 provided in any of the foregoing embodiments of the present disclosure, wherein a plurality of magnets 200 are arranged on the inner side wall of the yoke 100, and the plurality of magnets 200 are evenly distributed along the circumferential direction of the yoke 100. The material of the magnet 200 is, for example, magnetic steel, which is also called aluminum nickel cobalt alloy (AlNiCo). Magnetic steel is a permanent magnetic alloy synthesized from a variety of strong metals.

[0057] The motor rotor provided with the yoke 100 provided in the embodiment of the present disclosure has all the technical effects of the yoke 100 provided in the embodiment of the present disclosure. For example, the multi-layered rings of the yoke 100 are all full circles, so that the air gap between the motor rotor and the stator is uniform, and the motor rotor does not generate friction with the stator, and does not generate order noise.

[0058] Among them, reference Figure 3 As shown in the figure, each magnet 200 is in a tile shape, and there is a gap space between two adjacent magnets 200, and the gap space exposes the protrusion 13 or the recessed portion 14 on the innermost ring of the yoke 100. Figure 5 and Figure 7 The motor rotor also includes a plastic-coated portion (not shown in the drawings), which is arranged on the inner wall of the yoke 100. The plastic-coated portion can cooperate with the protrusion 13 or the recessed portion 14 exposed in the gap space to limit the magnet 200 in the circumferential direction.

[0059] According to an exemplary embodiment of the present disclosure, an embodiment of the present disclosure further provides a drive motor, which can be a direct drive motor (also known as a DD motor). The drive motor includes a stator and a motor rotor provided by any of the foregoing embodiments of the present disclosure, and the stator can be arranged on the inner ring of the motor rotor. This type of drive motor is also called an outer rotor motor. When the motor rotor provided by the embodiment of the present disclosure is applied to the drive motor, the friction, noise and vibration generated between the rotor and the stator can be effectively improved.

[0060] According to an exemplary embodiment of the present disclosure, an embodiment of the present disclosure further provides a cleaning device, the cleaning device includes the drive motor provided in the above embodiment of the present disclosure, and the drive motor can provide power when the cleaning device is cleaning. The cleaning device can be a device with a rotary cleaning function, such as a pulsator washing machine, a drum washing machine, a floor scrubber, etc.

[0061] The cleaning device provided with the driving motor provided by the embodiment of the present disclosure has all the technical effects of the yoke 100 provided by the embodiment of the present disclosure, for example, the cleaning process is noise-free, the rotation is stable, and the service life is long.

[0062] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0063] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A yoke, characterized in that: The magnetic yoke comprises a plurality of circular rings formed by a metal belt, and the plurality of circular rings are coaxially nested; When the metal belt is in a flat state, in the extension direction of the metal belt, the metal belt includes a plurality of metal sheets connected in sequence, and a step structure is provided at the connection between two adjacent metal sheets; Each section of the metal sheet surrounds and forms a layer of the circular ring, and the head and tail of each section of the metal sheet are connected via the step structure.

2. The yoke according to claim 1, characterized in that In the radial direction of the yoke, the height of the step structure is equal to the thickness of the metal sheet.

3. The yoke according to claim 1, characterized in that: The multi-segment metal sheet comprises a first type of metal sheet and a second type of metal sheet, wherein in the thickness direction of the metal sheet, a locking protrusion protruding from the first type of metal sheet is provided on the surface of the first type of metal sheet, and a locking through hole penetrating the second type of metal sheet is provided on the second type of metal sheet; In the radial direction of the yoke, the locking protrusion extends into the locking through hole.

4. The yoke according to claim 3, characterized in that: When the metal strip is in a flat state, in the extension direction of the metal strip, the first type of metal sheet is arranged at the end of the metal strip, and the locking protrusion is arranged at an end of the first type of metal sheet away from the other metal sheets.

5. The yoke according to claim 3 or 4, characterized in that: The locking protrusion comprises: A protruding body, the protruding body is connected to the metal sheet, and the protruding body passes through the locking through hole; The bent section is connected to an end of the protruding body away from the metal sheet, and the bent section is perpendicular to an extending direction of the protruding body.

6. The yoke according to claim 1, characterized in that: Each of the metal sheets is provided with a protrusion and a recess, and the protrusion on each of the metal sheets extends into the recess of the metal sheet adjacent to it in the radial direction of the yoke.

7. A motor rotor, characterized in that: It comprises a plurality of magnets and a yoke as claimed in any one of claims 1 to 6, wherein the plurality of magnets are arranged on an inner side wall of the yoke, and the plurality of magnets are evenly distributed along a circumferential direction of the yoke.

8. The motor rotor according to claim 7, characterized in that: The motor rotor further comprises a plastic-coated portion, wherein the plastic-coated portion is arranged on the inner side wall of the magnetic yoke; There is a gap space between adjacent magnets and the protrusion or recess of the yoke is exposed, and the overmolding portion fills the gap space and is connected to the protrusion or recess.

9. A driving motor, characterized in that: It comprises a stator and a motor rotor as claimed in claim 7 or 8.

10. A cleaning device, characterized in that: Comprising the drive motor as claimed in claim 9.

11. The cleaning device according to claim 10, characterized in that The cleaning device comprises a washing machine.

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