Electromagnetic clutch assembly, transmission system and pulsator washing machine

Abstract

The application provides an electromagnetic clutch assembly, a transmission system and a pulsator washing machine, and belongs to the technical field of fabric treatment equipment. The electromagnetic clutch assembly is characterized in that magnetic units are arranged on at least one attracting end surface of a magnetic yoke and an armature, the circumferential angles of the magnetic units are not all equal, the circumferential magnetic flux density difference is formed, and the tangential magnetic pulling force is generated at the attracting moment. The tangential force makes the armature rotate automatically and finely relative to the magnetic yoke, rapidly overcomes the initial static friction, reduces the sliding friction work and abrasion, improves the response speed, simultaneously reduces the temperature rise and noise, and prolongs the service life of the assembly.

Description

Technical Field

[0001] This application relates to the field of fabric processing equipment technology, and more specifically, to an electromagnetic clutch assembly, a transmission system, and a pulsator washing machine. Background Technology

[0002] In traditional washing machines, electromagnetic clutches typically employ a symmetrical magnetic pole distribution to achieve a stable connection between the drive disc and the driven disc.

[0003] However, this structure has significant limitations in terms of response speed and dynamic control, especially in high-precision control scenarios that require frequent switching of operating states. Summary of the Invention

[0004] This application provides an electromagnetic clutch assembly, a transmission system, and a pulsator washing machine. The electromagnetic clutch assembly comprises magnetic units arranged on at least one engaging end face of the yoke and armature, with these magnetic units having unequal circumferential angles, creating a difference in circumferential magnetic flux density. This generates a tangential magnetic pull at the moment of engagement. This tangential force causes the armature to automatically rotate and fine-tune relative to the yoke, quickly overcoming initial static friction, reducing slippage work and wear, improving response speed, and simultaneously reducing temperature rise and noise, thus extending the assembly's lifespan. Specifically:

[0005] The first aspect of this application provides an electromagnetic clutch assembly, including:

[0006] The armature, yoke, and coil are arranged opposite to each other, and the armature can be far away from or close to the yoke. The coil is used to generate a magnetic field when energized, so that the armature is attracted to the yoke and released when the energizer is de-energized.

[0007] Among them, at least one of the attraction end faces of the yoke and the armature is provided with a number of magnetic units, including permanent magnet units or magnetic conductor units that exhibit polarity after magnetization. The magnetic units are arranged at intervals along the circumference and at least some of the units have different circumferential angles, so as to form a difference in circumferential magnetic flux density and generate tangential magnetic pull when attracted.

[0008] In the above technical solution, several magnetic units are arranged alternately in an NSNS pattern along the circumference, and at least one pair of adjacent magnetic units have unequal circumferential angles.

[0009] In the above technical solution, the circumferential angles of any two adjacent magnetic units along the circumferential direction are not equal.

[0010] In the above technical solution, the magnetic unit forms a fan-shaped pole region on the attraction end face. Multiple fan-shaped pole regions are arranged sequentially along the circumference and together form a complete circular end face, and the central angles of each fan-shaped pole region are not equal.

[0011] In the above technical solution, a number of fan-shaped pole regions are provided in the circumferential direction of the suction end face, and the number of fan-shaped pole regions are configured to be arranged in the circumferential direction according to a preset cyclic gradient rule.

[0012] The cyclic gradient rule is as follows: several fan-shaped pole regions are provided in the circumferential direction of the suction end face, and the several fan-shaped pole regions are configured to be arranged in the circumferential direction according to a preset gradient rule;

[0013] The preset gradient rule is configured such that the central angles of several sector polar regions increase or decrease gradually along the circumference.

[0014] In the above technical solution, the preset gradient rule is repeated once or multiple times over the whole week to form a cyclic gradient distribution.

[0015] In the above technical solution, the circumferential direction of the suction end face is divided into eight continuous sector-shaped pole regions, and the central angle of each sector-shaped pole region is distributed in a cyclic gradient distribution of 30°-40°-50°-60°-30°-40°-50°-60° along the circumferential direction.

[0016] In the above technical solution, both the armature and the yoke are constructed as coaxial disk-shaped structures, and annular belt grooves are formed on the outer periphery of both the armature and the yoke.

[0017] The belt groove is used to install the belt.

[0018] In the above technical solution, the electromagnetic clutch assembly also includes:

[0019] The return spring has one end fixed to the magnetic yoke's attraction surface and the other end abutting against the armature's attraction surface.

[0020] A second aspect of this application provides a transmission system including the electromagnetic clutch assembly described above.

[0021] In the above technical solution, the transmission system includes:

[0022] The main drive shaft has at least two sets of electromagnetic clutch assemblies arranged in parallel along its axis.

[0023] The yoke of each electromagnetic clutch assembly is fixedly sleeved on the main drive shaft, and the armature is axially slidably sleeved on the main drive shaft and opposite to the corresponding yoke.

[0024] The armature attracts the yoke when the corresponding coil is energized to obtain torque.

[0025] A third aspect of this application provides a pulsator washing machine that includes the aforementioned transmission system.

[0026] In the above technical solution, the washing machine includes:

[0027] The drive motor has its output shaft connected to the main drive shaft.

[0028] The first and second transmission components corresponding to the electromagnetic clutch assembly are as follows:

[0029] The first transmission component has its input end connected to one of the armature and the magnetic yoke, and its output end connected to the inner drum of the corresponding washing drum. The second transmission component has its input end connected to the remaining one of the armature and the magnetic yoke, and its output end connected to the impeller chassis of the corresponding washing drum.

[0030] In the above technical solution, the input end of the first transmission component is connected to the magnetic yoke drive, and the input end of the second transmission component is connected to the armature drive.

[0031] In the above technical solution, the second transmission component is configured to: provide a reverse reversing structure in the transmission chain from the armature to the impeller chassis, so that when the first transmission component and the second transmission component work simultaneously, the rotation direction of the impeller chassis is opposite to the rotation direction of the inner cylinder.

[0032] In the above technical solution, the reverse reversing structure is configured to: while realizing the reversal of the direction of the inner cylinder and the impeller chassis, increase or decrease the output speed of the impeller chassis relative to the speed of the inner cylinder, so as to create a speed difference between the impeller chassis and the inner cylinder.

[0033] In the above technical solution, the first transmission component includes a first belt, which is sleeved between the outer edge of the magnetic yoke and the inner drum shaft of the corresponding washing drum, so as to synchronously transmit the torque of the magnetic yoke to the inner drum.

[0034] In the above technical solution, the second transmission component includes:

[0035] The second belt is fitted between the outer edge of the armature and the pulley of a drive shaft;

[0036] The driving gear is coaxially fixed on the transmission shaft; and

[0037] A driven gear disk that is fixed coaxially with the impeller shaft and meshes with the driving gear;

[0038] The driving gear and the driven gear disc form a reverse reversing structure so that the rotation direction of the impeller chassis is opposite to the rotation direction of the inner cylinder.

[0039] In the above technical solution, the gear ratio between the driving gear and the driven gear disk is set so that the rotational speed of the impeller chassis is different from the rotational speed of the inner cylinder.

[0040] In the above technical solution, the pulsator washing machine is a multi-drum pulsator washing machine with multiple washing drums;

[0041] Each washing drum is equipped with an electromagnetic clutch assembly, as well as a first transmission assembly and a second transmission assembly that are matched with the electromagnetic clutch assembly.

[0042] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0043] The electromagnetic clutch assembly in this embodiment provides magnetic units on at least one engaging end face of the yoke and the armature, and makes the circumferential angles of these magnetic units not all equal, forming a difference in circumferential magnetic flux density, thereby generating a tangential magnetic pull at the moment of engagement; this tangential force causes the armature to automatically rotate and finely adjust relative to the yoke, quickly overcoming the initial static friction, reducing slip work and wear, improving response speed, and at the same time reducing temperature rise and noise, and extending the assembly life. Attached Figure Description

[0044] Figure 1 This is a schematic diagram of the electromagnetic clutch assembly in an embodiment of this application;

[0045] Figure 2 This is a schematic diagram of the magnetic yoke's attraction surface structure in an embodiment of this application;

[0046] Figure 3 This is an exploded view of the washing machine in an embodiment of this application;

[0047] Figure 4 This is a schematic diagram of the combined structure of the washing machine in an embodiment of this application;

[0048] Figure 5 This is a cross-sectional view of the washing machine in an embodiment of this application;

[0049] Figure 6 This is a schematic diagram of the process of the washing machine in micro-vibration mode in the embodiments of this application.

[0050] in:

[0051] 10 - Main drive shaft;

[0052] 20-Electromagnetic clutch assembly; 201-Magnetic yoke; 2011-Magnetic unit; 202-Armature; 203-Coil;

[0053] 30 - First transmission assembly;

[0054] 40-Second transmission assembly; 401-Second belt; 402-Drive shaft; 403-Driving gear; 404-Driven gear disc;

[0055] 50 - Inner cylinder; 501 - Cylinder shaft;

[0056] 60 - Impeller chassis; 601 - Impeller shaft. Detailed Implementation

[0057] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0058] Throughout the specification and claims, the following terms will have at least the meaning explicitly associated herein, unless the context otherwise requires. The meanings defined below are not intended to limit the terms, but are merely illustrative examples.

[0059] In the description of this invention, the phrase "in one embodiment" does not necessarily refer to the same embodiment, although it may refer to the same embodiment. Similarly, the phrase "in some embodiments," as used herein, does not necessarily refer to the same embodiment when used multiple times, although it may refer to the same embodiment. As used herein, the term "or" is an inclusive "or" operator and is equivalent to the term "and / or," unless the context clearly specifies otherwise. The term "based on" is not exclusive and allows for reliance on additional factors not described, unless the context clearly specifies otherwise. The word "exemplary" herein means "used as an example, instance, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as superior to or better than other embodiments. The scope of this invention is limited only by the scope of the appended claims, and any examples set forth in this specification are not intended to be limiting, but merely illustrate some of the many possible embodiments of the claimed invention. The various embodiments provided in this invention should not be construed as limiting the scope of protection of this invention.

[0060] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0062] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0063] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0064] Addressing the shortcomings of traditional electromagnetic clutches, which can only output axial attraction force with symmetrical magnetic poles, cannot actively overcome static friction, have slow synchronization, and suffer from high sliding wear, this application introduces asymmetrical magnetic units 2011 with unequal circumferential angles at the engagement end faces of the yoke 201 and armature 202. This forms a periodic magnetic flux density gradient, generating tangential magnetic pull at the moment of engagement, driving the armature 202 to automatically rotate and fine-tune, achieving "soft landing" synchronization. Thus, a single magnetic structure can simultaneously achieve fast response, low wear, and bidirectional differential output. The aim is to replace traditional friction plates or planetary mechanisms with an extremely simple shaft-multi-clutch solution, providing an integrated solution with fast synchronization, low noise, and long lifespan for multi-mode, high-frequency switching scenarios such as washing machines.

[0065] Example

[0066] Based on this, such as Figures 1-6 As shown, a first aspect of this application provides an electromagnetic clutch assembly, including:

[0067] The armature 202, the yoke 201 and the coil 203 are arranged opposite to each other, and the armature 202 can be far away from or close to the yoke 201. The coil 203 is used to generate a magnetic field when energized, so that the armature 202 is attracted to the yoke 201, and to release the armature 202 when de-energized.

[0068] Among them, at least one of the attraction end faces of the magnetic yoke 201 and the armature 202 is provided with a plurality of magnetic units 2011. The magnetic units 2011 include permanent magnet units or magnetic conductor units that exhibit polarity after being magnetized. Each magnetic unit 2011 is arranged circumferentially at intervals and at least some of the units have different circumferential angles, so as to form a difference in circumferential magnetic flux density and generate tangential magnetic pull when attracted.

[0069] In this embodiment, magnetic units 2011 are provided on at least one engaging end face of the yoke 201 and the armature 202, and the circumferential angles of these magnetic units 2011 are not all equal, forming a difference in circumferential magnetic flux density, thereby generating a tangential magnetic pull at the moment of engagement; this tangential force causes the armature 202 to automatically rotate and finely adjust relative to the yoke 201, quickly overcomes the initial static friction, achieves rapid synchronization, reduces sliding friction work and wear, improves response speed, and at the same time reduces temperature rise and noise, and extends component life.

[0070] Furthermore, in some possible implementations, a plurality of magnetic units 2011 are arranged in an alternating NSNS pattern along the circumference, and at least one pair of adjacent magnetic units 2011 have unequal circumferential angles.

[0071] In this embodiment, by setting several magnetic units 2011 to alternate NSNS polarities along the circumference and ensuring that the circumferential angles of at least one pair of adjacent magnetic units 2011 are not equal, the magnetic flux density exhibits a regular high-low difference in the circumferential direction. This difference generates a continuous tangential magnetic pull at the moment the yoke 201 and armature 202 are attracted, driving the armature 202 to rotate automatically for alignment, further shortening the synchronization time, reducing slip friction loss, improving the stability of attraction and the life of the component.

[0072] Furthermore, in some possible implementations, the circumferential angles of any two adjacent magnetic units 2011 along the circumferential direction are not equal.

[0073] In this embodiment, all circumferentially adjacent magnetic units 2011 are set to have unequal circumferential angles, so that the magnetic flux density gradient changes continuously. During the attraction process between the yoke 201 and the armature 202, a continuous and gradually changing tangential magnetic pull is formed, which drives the armature 202 to rotate smoothly for alignment, further shortening the synchronization time, reducing impact and friction work, and improving the attraction compliance and component life.

[0074] Furthermore, in some possible implementations, the magnetic unit 2011 forms a fan-shaped pole region on the attraction end face. Multiple fan-shaped pole regions are arranged sequentially along the circumference and together form a complete circular end face, and the central angles of each fan-shaped pole region are not equal.

[0075] In this embodiment, the magnetic unit 2011 is designed as a fan-shaped pole region and arranged sequentially along the circumference to form a complete circular end face, and the central angles of each fan-shaped pole region are not equal, so that the magnetic yoke 201 and the armature 202 form a continuous and uniform circumferential magnetic flux density gradient at the moment of attraction; this gradient generates a stable tangential magnetic pull force, driving the armature 202 to rotate smoothly and align, further reducing impact and friction work, and improving the attraction synchronization accuracy and component life.

[0076] Furthermore, in some possible implementations, the circumferential direction of the suction end face is provided with a plurality of fan-shaped pole regions, which are configured to be arranged in the circumferential direction according to a preset gradient rule.

[0077] The preset gradient rule is configured such that the central angles of several sector polar regions increase or decrease gradually along the circumference.

[0078] In this embodiment, a preset gradient rule of "gradually increasing or decreasing and then returning to the initial value" is set on the attraction end face, so that the central angle of the sector pole region forms a continuously changing magnetic flux density gradient in the circumferential direction. This gradient generates a tangential magnetic pull force in the same direction at the moment when the yoke 201 and the armature 202 are attracted, driving the armature 202 to rotate smoothly and align, further reducing impact and friction work, improving the attraction synchronization accuracy and component life, and providing a basis for subsequent periodic repetitive layout.

[0079] Furthermore, in some possible implementations, the preset gradient rule is repeated once or multiple times over the whole cycle to form a cyclic gradient distribution.

[0080] In this embodiment, the central angle of the sector pole region is set to a repeating sequence of "gradually increasing and then resetting" along the circumference using a cyclic gradient rule, so that the magnetic yoke 201 and the armature 202 attracting end face form a periodic magnetic flux density gradient; this gradient generates a tangential magnetic pull in the same direction in each cycle region, driving the armature 202 to rotate smoothly in segments for alignment, continuously reducing the initial static friction and sliding friction work, achieving rapid synchronization, reducing wear, and improving the compliance and repeatability of the attracting process.

[0081] Furthermore, in some possible implementations, the circumferential direction of the suction end face is divided into eight consecutive sector-shaped pole regions, and the central angle of each sector-shaped pole region is distributed in a cyclic gradient distribution of 30°-40°-50°-60°-30°-40°-50°-60° along the circumferential direction.

[0082] In this embodiment, by arranging eight sector pole regions in a cyclic gradient of 30°-40°-50°-60°-30°-40°-50°-60°, the magnetic yoke 201 and armature 202 form two "from sparse to dense" magnetic flux density waves at the engagement end face. These waves generate continuous and consistent tangential magnetic pull within each gradient segment, driving the armature 202 to rotate smoothly in two segments for alignment. This further shortens the synchronization time, reduces impact and friction work, and achieves fast, low-wear, and reliable engagement.

[0083] Furthermore, in some possible embodiments, the armature 202 and the yoke 201 are both constructed as coaxial disk-shaped structures, and the outer periphery of the armature 202 and the yoke 201 are both formed with annular belt grooves.

[0084] The belt groove is used to install the belt.

[0085] In this embodiment, the armature 202 and the magnetic yoke 201 are both designed as coaxial disc structures, and annular belt grooves are provided on their outer periphery. This allows the tangential magnetic pull force to be directly transmitted to the belt through the belt grooves at the moment of attraction, without the need for additional couplings or flanges. This integrated structure shortens the axial dimension, reduces the number of parts and assembly errors, and ensures efficient and stable rotational output after rapid synchronization, thereby reducing system weight and cost.

[0086] Furthermore, in some possible implementations, the electromagnetic clutch assembly further includes:

[0087] The return spring has one end fixed to the magnetic yoke 201 and the other end abutting against the armature 202.

[0088] In this embodiment, a reset spring is provided between the magnetic yoke 201 engagement surface and the armature 202 engagement surface. After the coil is de-energized, the spring immediately provides axial separation force, causing the armature 202 to quickly move away from the magnetic yoke 201, ensuring that the clutch disengages quickly without residual engagement. This structure shortens the disengagement time, avoids dragging and mis-transmitting torque, and reduces the dependence on the residual magnetism of the permanent magnet, thereby improving the response speed and reliability.

[0089] Furthermore, a second aspect of the present application also provides a transmission system including the electromagnetic clutch assembly described above.

[0090] When the electromagnetic clutch assembly in this embodiment is integrated into the transmission system, it utilizes the tangential magnetic pull generated when it engages to quickly overcome static friction, achieve synchronization, and reduce sliding wear. This allows the system to instantly engage or disengage rotational power under high response and low wear conditions. This configuration reduces the impact and wear of traditional friction plates or toothed clutches, extends the life of the transmission chain, and reduces noise, temperature rise, and maintenance costs, providing a hardware foundation for subsequent bidirectional, multi-speed, or high-frequency switching.

[0091] Furthermore, in some possible implementations, the transmission system includes:

[0092] The main drive shaft has at least two sets of electromagnetic clutch assemblies arranged in parallel along its axis.

[0093] The yoke 201 of each electromagnetic clutch assembly is fixedly sleeved on the main drive shaft, and the armature 202 is axially slidably sleeved on the main drive shaft and opposite to the corresponding yoke 201.

[0094] When the corresponding coil 203 is energized, the armature 202 is attracted to the yoke 201 to obtain torque.

[0095] In this embodiment, at least two sets of electromagnetic clutch assemblies are arranged in parallel on the main drive shaft, and each yoke 201 is fixedly sleeved on the main drive shaft and the armature 202 is axially slidably sleeved. The engagement or disengagement of each armature 202 and yoke 201 is controlled by the independent on / off power of the corresponding coil 203, so as to realize the instantaneous selection and switching of multiple output paths on the same main drive shaft. The tangential magnetic pull ensures that each path is quickly synchronized, reduces sliding friction work, reduces wear and heat generation, and enables the system to have high response, reversibility and multi-level output capabilities. At the same time, it simplifies the structure, reduces the axial size, and reduces manufacturing and maintenance costs.

[0096] Furthermore, a third aspect of the embodiments of this application also provides a pulsator washing machine, which includes the above-described transmission system.

[0097] Specifically, washing machines include:

[0098] A drive motor, the output shaft of which is connected to a main drive shaft 10;

[0099] The first transmission assembly 30 and the second transmission assembly 40 are provided corresponding to the electromagnetic clutch assembly 20:

[0100] The first transmission component 30 has its input end connected to one of the armature 202 and the magnetic yoke 201, and its output end connected to the inner drum 50 of the corresponding washing drum. The second transmission component 40 has its input end connected to the other of the armature 202 and the magnetic yoke 201, and its output end connected to the impeller chassis 60 of the corresponding washing drum.

[0101] Preferably, the above-mentioned pulsator washing machine is a multi-drum pulsator washing machine with multiple washing drums;

[0102] Each washing drum is equipped with an electromagnetic clutch assembly 20, and a first transmission assembly 30 and a second transmission assembly 40 that are matched with the electromagnetic clutch assembly 20.

[0103] In this embodiment, the single drive motor continuously rotates all the magnetic yokes 201 via the main drive shaft 10. The first transmission component 30 and the second transmission component 40 are respectively connected to the magnetic yokes 201 and the armature 202, forming two independent transmission chains. The transmission chain connected to the armature 202 (usually the second transmission component 40) can selectively connect the torque to the inner drum 50 or the impeller chassis 60 by means of the switching on and off of the coil 203, so that it only starts to rotate when needed and generates a reverse differential water flow with another component that is always rotating. Thus, a single motor-clutch system can complete multi-drum, multi-mode, low-energy fine washing in a mini space, significantly reducing the number of parts, reducing costs and improving reliability.

[0104] Furthermore, in some possible implementations, the input end of the first transmission component 30 is driven to be connected to the yoke 201, and the input end of the second transmission component 40 is driven to be connected to the armature 202.

[0105] In this embodiment, the first transmission component 30 is directly connected to the magnetic yoke 201, causing the inner drum 50 to rotate continuously. At the same time, the second transmission component 40 is connected to the armature 202, and the start, stop and rotation of the impeller chassis 60 are controlled by the on / off state of the coil 203. Thus, a composite water flow of "constant rotation of the inner drum + optional rotation of the impeller" is formed during the washing process, which not only ensures the washing power and uniformity, but also realizes the switching of multiple modes such as gentle, fine washing, standard and spin-only through the on / off state of the clutch, further reducing energy consumption and noise, and improving the functional integration and reliability of the mini washing machine.

[0106] Furthermore, in some possible embodiments, the second transmission assembly 40 is configured to provide a reverse reversing structure in the transmission chain from the armature 202 to the impeller chassis 60, so that when the first transmission assembly 30 and the second transmission assembly 40 work simultaneously, the rotation direction of the impeller chassis 60 is opposite to the rotation direction of the inner cylinder 50.

[0107] In this embodiment, a reverse reversing structure is introduced between the armature 202 and the impeller chassis 60, so that when the coil 203 is engaged and the second transmission component 40 is powered, the impeller chassis 60 can rotate in the opposite direction to the inner drum 50. Thus, within the same single motor-clutch system, both the forward drum wall water flow and the reverse impeller water flow are generated simultaneously, forming a three-dimensional kneading effect, improving the washing ratio and reducing wear on clothes. Moreover, the reversal of direction is entirely guaranteed by the mechanical structure, without the need for additional control logic, further simplifying the system and improving reliability.

[0108] Furthermore, in some possible implementations, the reversing structure is configured to: while reversing the directions of the inner cylinder 50 and the impeller chassis 60, increase or decrease the output speed of the impeller chassis 60 relative to the speed of the inner cylinder 50, so as to create a speed difference between the impeller chassis 60 and the inner cylinder 50.

[0109] The reverse reversing structure in this embodiment not only sets the direction of the impeller chassis 60 to be opposite to that of the inner drum 50, but also synchronously completes the speed increase or decrease in the mechanical chain through the gear ratio or pulley diameter ratio, so that a speed difference is naturally formed between the impeller chassis 60 and the inner drum 50. This speed difference exists as soon as the clutch engages, and without additional control, it can generate water flow shear with adjustable strength in the drum, improve washing efficiency and reduce fabric wear, while maintaining a minimalist structure of single motor and single clutch, further reducing energy consumption and manufacturing costs.

[0110] Furthermore, in some possible implementations, the first transmission assembly 30 includes a first belt that is sleeved between the outer edge of the magnetic yoke 201 and the inner drum 50 shaft 501 of the corresponding washing drum, so as to synchronously transmit the torque of the magnetic yoke 201 to the inner drum 50.

[0111] In this embodiment, a single first belt directly connects the outer edge of the magnetic yoke 201 to the inner cylinder shaft 501, so that once the magnetic yoke 201 rotates with the main drive shaft 10, the inner cylinder 50 is synchronously driven and keeps rotating continuously in the forward direction. This belt pair has a simple structure and occupies very little space. It does not require additional deceleration or tensioning mechanisms, which not only ensures the smooth and reliable operation of the inner cylinder, but also provides a constant reverse reference for the impeller chassis 60 of the subsequent clutch control. Thus, the composite water flow foundation of "constantly rotating inner cylinder + controllable impeller" is realized in a miniature body with the lowest part cost.

[0112] Furthermore, in some possible implementations, the second transmission assembly 40 includes:

[0113] The second belt 401 is sleeved between the outer edge of the armature 202 and the pulley of a drive shaft 402;

[0114] The drive gear 403 is coaxially fixed on the transmission shaft 402; and

[0115] A driven gear disk 404 is fixed coaxially with the impeller shaft 601 and meshes with the driving gear 403;

[0116] The driving gear 403 and the driven gear disk 404 form a reverse reversing structure so that the rotation direction of the impeller chassis 60 is opposite to the rotation direction of the inner cylinder 50.

[0117] In this embodiment, the torque of the armature 202 is first transmitted to the drive shaft 402 via the second belt 401, and then the coaxial driving gear 403 meshes with the driven gear disk 404 to reverse the power and output it to the impeller shaft 601. This structure starts the moment the armature 202 is attracted, and the impeller chassis 60 can be rotated in the opposite direction to the inner drum 50 by using the first-level external meshing, forming a strong rubbing water flow and improving the washing ratio. At the same time, the entire chain segment has few parts and a small center distance, which can be directly hidden in the clutch cover without increasing the overall height of the machine, further ensuring the compactness and reliability of the mini washing machine.

[0118] Furthermore, in some possible implementations, the gear ratio of the driving gear 403 to the driven gear disk 404 is set such that the rotational speed of the impeller chassis 60 is different from the rotational speed of the inner cylinder 50.

[0119] In this embodiment, the tooth ratio between the driving gear 403 and the driven gear disk 404 is used to generate a speed difference during meshing and reversal, so that the speed of the impeller chassis 60 is naturally different from that of the inner drum 50. This speed difference exists instantly when the coil is attracted, and without additional control or speed change mechanism, the impeller differential speed eddy current can be superimposed in the continuous water flow in the inner drum, which improves washing efficiency and reduces clothes tangling. Moreover, the size of the speed difference can be flexibly adjusted by simply changing the number of teeth, further simplifying the structure, reducing noise and cost, and improving the adaptability and reliability of the mini washing machine.

[0120] Furthermore, in some possible implementations, the washing machine has at least a first washing mode, a second washing mode, and a third washing mode;

[0121] In the first washing mode, the armature 202 is controlled to separate from the yoke 201:

[0122] In the second washing mode, the armature 202 is controlled to couple with the yoke 201;

[0123] In the third washing mode, the armature 202 is controlled to be intermittently coupled with the yoke 201.

[0124] In this embodiment, by controlling the armature 202 and the yoke 201 to three states—separation, continuous coupling, and intermittent coupling—three washing modes are formed: a first washing mode (only the inner drum 50 rotates, the impeller base 60 is stationary, and the water flow is gentle), a second washing mode (the inner drum 50 and the impeller base 60 rotate in opposite directions simultaneously, and the water rubs vigorously), and a third washing mode (the impeller base 60 intermittently reverses direction, generating periodic strong and weak water flows). This allows for the implementation of multiple programs such as gentle washing, standard washing, and fine washing within the same single-motor-single-clutch hardware. This control requires no additional actuators; it can be completed simply by changing the on / off timing of the coil 203. This significantly simplifies the system, shortens program switching time, reduces energy consumption and noise, and improves the functional density and user experience of the mini washing machine.

[0125] Furthermore, in some possible implementations,

[0126] The first washing mode is the baby care mode;

[0127] The second washing mode is the standard clean wash mode;

[0128] The third washing mode is the lingerie decal wash mode.

[0129] Specifically:

[0130] If the user selects the "Baby Care" mode of the "Inner Drum", the coil 203 is not energized and the armature 202 is stationary. Power is transmitted through the magnetic yoke 201 and the first belt to drive the inner drum 50 to rotate in the forward direction. The impeller chassis 60 is not powered and remains stationary. The water flow inside the drum rotates steadily in one direction, performing a gentle baby care.

[0131] If the user selects the "Standard Wash" mode for the "Inner Drum", the coil 203 is energized, attracting the armature 202. The power is divided into two paths through the main drive shaft 10: one path drives the inner drum 50 to rotate forward via the magnetic yoke 201 and the first belt, and the other path drives the impeller chassis 60 to rotate in the opposite direction via the armature 202, the second belt 401, the transmission shaft 402, the drive gear 403, and the driven gear disk 404. The water flow inside the drum will tumble violently due to the rotational driving forces in two opposite directions, performing a standard wash.

[0132] If the user selects the "underwear washing" mode of the "inner drum", the inner drum 50 and the impeller chassis 60 rotate in opposite directions intermittently with a specific speed difference, achieving efficient cleaning and low wear. At this time, the coil 203 of the electromagnetic clutch assembly 20 is intermittently switched on and off, thereby causing the armature 202 to intermittently drive the impeller chassis 60 to reverse.

[0133] If the user selects the "single-discharge" mode of the "inner cylinder", the coil 203 of the electromagnetic clutch assembly 20 is not energized, and the main drive shaft 10 drives the inner cylinder 50 to run at high speed through the magnetic yoke 201 and the first belt to dehydrate.

[0134] It should be noted that since the multiple inner cylinders 50 are controlled by the energization and de-energization of their respective coils 203 to achieve independent model operation, and since the multiple inner cylinders 50 are driven by the same main drive shaft, the "single disengagement" mode must be carried out simultaneously when the multiple inner cylinders 50 are working at the same time.

[0135] It should be noted that, since the magnetic yoke 201 and armature 202 in this embodiment can generate tangential magnetic attraction when attracted, the pulsator washing machine in this embodiment can also be equipped with a micro-vibration mode, such as... Figure 6As shown, when the coil is energized, the magnetic field generates a tangential magnetic pull at the moment of engagement, achieving rapid self-alignment and low-friction engagement. The control system applies a high-frequency pulse signal to the coil 203 to achieve high-frequency repeated engagement and disengagement of the armature 202 and the yoke 201, driving the inner drum 50 to generate low-amplitude, high-frequency micro-vibrations, thus achieving optimized control in rinsing or spin-drying modes. Specifically, during the rinsing stage, the control system applies a PWM signal with a frequency of 10 Hz–50 Hz and a duty cycle of 10%–40%, causing the inner drum 50 to generate low-amplitude, reciprocating micro-vibrations to break up and remove detergent foam from the clothing fibers.

[0136] In the above embodiments of this application, the descriptions of each embodiment have their own emphasis. Parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments. The steps illustrated in the related flowcharts can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowcharts, in some cases, the steps shown or described may be performed in a different order than that shown here. In other words, the order of steps described in the foregoing embodiments is merely an example. Reasonable adjustments to the order of steps based on the content of the embodiments of this application are also within the protection scope of the embodiments of this application.

[0137] The sequence numbers or order of description of the embodiments in this application are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0138] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0139] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An electromagnetic clutch assembly, characterized in that, include: The armature (202), the yoke (201), and the coil (203) are arranged opposite to each other, and the armature (202) can be away from or close to the yoke (201). The coil (203) is used to generate a magnetic field when energized, so that the armature (202) is attracted to the yoke (201), and to release the armature (202) when de-energized. Among them, at least one of the attraction end faces of the magnetic yoke (201) and the armature (202) is provided with a plurality of magnetic units (2011). The magnetic units (2011) include permanent magnet units or magnetic conductor units that exhibit polarity after magnetization. Each of the magnetic units (2011) is arranged circumferentially at intervals and at least some of the units have unequal circumferential angles, so as to form a circumferential magnetic flux density difference and generate tangential magnetic pull when attracted. The magnetic unit (2011) forms a fan-shaped pole region on the attracting end face. The attracting end face has a plurality of fan-shaped pole regions in the circumferential direction. The plurality of fan-shaped pole regions are arranged in the circumferential direction according to a preset gradient rule. The preset gradient rule is configured such that the central angles of several sector polar regions increase or decrease gradually along the circumferential direction.

2. The electromagnetic clutch assembly according to claim 1, characterized in that, Several of the aforementioned sector-shaped polar regions are arranged in an alternating NSNS pattern along the circumferential direction.

3. The electromagnetic clutch assembly according to claim 1, characterized in that, Several of the aforementioned sector-shaped polar regions are arranged sequentially along the circumference and together form a complete circular end face.

4. The electromagnetic clutch assembly according to claim 1, characterized in that, The preset gradient rule is repeated once or multiple times over the whole week to form a cyclic gradient distribution.

5. The electromagnetic clutch assembly according to claim 1, characterized in that, The circumferential direction of the suction end face is divided into eight consecutive sector-shaped pole regions, and the central angle of each sector-shaped pole region is distributed in a cyclic gradient distribution of 30°-40°-50°-60°-30°-40°-50°-60° along the circumferential direction.

6. The electromagnetic clutch assembly according to any one of claims 1-5, characterized in that, The armature (202) and the magnetic yoke (201) are both constructed as coaxial disk-shaped structures, and the outer periphery of the armature (202) and the magnetic yoke (201) are both formed with annular belt grooves. The belt groove is used to install a belt.

7. The electromagnetic clutch assembly according to any one of claims 1-5, characterized in that, The electromagnetic clutch assembly also includes: A reset spring, one end of which is fixed to the magnetic yoke (201) and the other end abuts against the armature (202) on the magnetic yoke (201).

8. A transmission system, characterized in that, The electromagnetic clutch assembly included in any one of claims 1-7.

9. The transmission system according to claim 8, characterized in that, The transmission system includes: A main drive shaft, on which at least two sets of the electromagnetic clutch assemblies are arranged in parallel along an axial direction; The yoke (201) of each set of the electromagnetic clutch assembly is fixedly sleeved on the main drive shaft, and the armature (202) is axially slidably sleeved on the main drive shaft and opposite to the corresponding yoke (201); The armature (202) is attracted to the yoke (201) when the corresponding coil (203) is energized to obtain torque.

10. A pulsator washing machine, characterized in that, The transmission system included in any one of claims 8 or 9.

11. The pulsator washing machine according to claim 10, characterized in that, The washing machine includes: A drive motor, the output shaft of which is connected to a main drive shaft (10). The first transmission assembly (30) and the second transmission assembly (40) are provided corresponding to the electromagnetic clutch assembly (20): The input end of the first transmission component (30) is driven to one of the armature (202) and the magnetic yoke (201), and the output end is connected to the inner drum (50) of the corresponding washing drum. The input end of the second transmission component (40) is driven to the other of the armature (202) and the magnetic yoke (201), and the output end is connected to the impeller chassis (60) of the corresponding washing drum.

12. The pulsator washing machine according to claim 11, characterized in that, The input end of the first transmission component (30) is driven to be connected to the magnetic yoke (201), and the input end of the second transmission component (40) is driven to be connected to the armature (202).

13. The pulsator washing machine according to claim 12, characterized in that, The second transmission assembly (40) is configured to provide a reverse reversing structure in the transmission chain from the armature (202) to the impeller chassis (60) so that when the first transmission assembly (30) and the second transmission assembly (40) work at the same time, the rotation direction of the impeller chassis (60) is opposite to the rotation direction of the inner cylinder (50).

14. The pulsator washing machine according to claim 13, characterized in that, The reverse reversing structure is configured to: while realizing the reversal of the directions of the inner cylinder (50) and the impeller chassis (60), increase or decrease the output speed of the impeller chassis (60) relative to the speed of the inner cylinder (50) so as to form a speed difference between the impeller chassis (60) and the inner cylinder (50).

15. The pulsator washing machine according to claim 12, characterized in that, The first transmission assembly (30) includes a first belt that is sleeved between the outer edge of the magnetic yoke (201) and the inner drum (50) shaft (501) of the corresponding washing drum, so as to synchronously transmit the torque of the magnetic yoke (201) to the inner drum (50).

16. The pulsator washing machine according to claim 12, characterized in that, The second transmission assembly (40) includes: The second belt (401) is sleeved between the outer edge of the armature (202) and the pulley of a drive shaft (402); A drive gear (403) coaxially fixed to the drive shaft (402); and A driven gear disk (404) is fixed coaxially with the impeller shaft (601) and meshes with the driving gear (403). The driving gear (403) and the driven gear disk (404) form a reverse reversing structure so that the rotation direction of the impeller chassis (60) is opposite to the rotation direction of the inner cylinder (50).

17. The pulsator washing machine according to claim 16, characterized in that, The gear ratio of the driving gear (403) to the driven gear disk (404) is set such that the rotational speed of the impeller chassis (60) is different from the rotational speed of the inner cylinder (50).

18. The pulsator washing machine according to any one of claims 11-17, characterized in that, The impeller-type washing machine is a multi-drum impeller washing machine with multiple washing drums; Each of the washing drums is equipped with an electromagnetic clutch assembly (20), and a first transmission assembly (30) and a second transmission assembly (40) that are matched with the electromagnetic clutch assembly (20).

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