Washing machine in which motor rotor is integrated into inner tub

Abstract

The present application discloses a washing machine with motor rotor integrated into the inner drum, relating to the field of washing machine technology, comprising an outer drum, an inner drum, and a drive motor. The end of the inner drum is coaxially provided with a rotation shaft, on which at least one bearing is sleeved. The bearing is arranged in the outer drum; the drive motor comprises a stator assembly and a rotor assembly. The stator assembly is arranged in the outer drum, and the rotor assembly is coaxially arranged on the rotation shaft or coaxially arranged at the end of the inner drum. The rotor assembly is coaxially sleeved on the outside of the stator assembly or coaxially inserted into the inside of the stator assembly.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of washing machines, specifically to a washing machine with motor rotor integrated into inner drum.BACKGROUND

[0002] In the existing technology, the motor of a direct drive motor washing machine is directly connected to the drum, eliminating the belt and pulley, thereby improving energy efficiency.

[0003] However, the aforementioned direct drive motor washing machines still have the following defects: (1) Installation difficulty: The stator and rotor are independent components. The stator is fixed to the housing with screws and positioning pins, while the rotor is fixed to the rotating rotation shaft through the rotor housing. The installation position of the direct drive motor is usually limited, requiring careful consideration of the motor's position during the design phase. This may increase the overall design complexity of the washing machine and may also limit its use in certain spaces or scenarios. (2) Large size: The direct drive motor is currently installed on the outside of the washing machine, and the rotation shaft system is relatively long, resulting in a large thickness dimension of the washing machine, making it difficult to control the overall size of the washing machine. (3) Complex production process: Currently, the direct drive motor is assembled after the inner and outer drums are completed. The stator and rotor of the direct drive motor, as independent components, need to be fixed and assembled separately using screws or pins, making the production process relatively complex. (4) Poor assembly precision: Since the stator and rotor of the motor must ensure uniform air gaps, they must be concentric with the rotation shaft of the inner drum tripod. Currently, the stator is independently injection molded, and the rotor support is sheet metal formed. The dimensional accuracy is difficult to control, which can easily lead to inaccurate positioning and uneven air gaps, causing vibration and noise. SUMMARY

[0004] To overcome the aforementioned technical problems, the purpose of the present application is to provide a washing machine with motor rotor integrated into inner drum, aimed at solving the issues of vibration and noise that occur during the operation of existing washing machines as mentioned in the background technology.

[0005] The objective of the present application can be achieved through the following technical solutions: A washing machine with motor rotor integrated into inner drum, comprising an outer drum, an inner drum, and a drive motor, wherein the end of the inner drum is coaxially provided with a rotation shaft, and at least one bearing is sleeved on the rotation shaft, and the bearing is arranged on the outer drum; The drive motor comprises a stator assembly and a rotor assembly; The stator assembly is arranged in the outer drum, and the rotor assembly is coaxially arranged on the rotation shaft or coaxially arranged at the end of the inner drum. Additionally, the rotor assembly is coaxially sleeved on the outside of the stator assembly or coaxially inserted into the inside of the stator assembly.

[0006] When one bearing is provided, a radial projection of the stator assembly along the rotation shaft partially overlaps or completely overlaps with a radial projection of the bearing along the rotation shaft.

[0007] When the number of bearings is more than one, the radial projection of the stator assembly along the rotation shaft partially overlaps or completely overlaps with one of the bearings' radial projections along the rotation shaft, or the radial projection of the stator assembly along the rotation shaft is between the radial projections of the two outermost bearings along the rotation shaft.

[0008] Preferably, an inner drum bracket is provided between the rotation shaft and the inner drum, with the rotation shaft positioned at the center of the inner drum bracket, and the inner drum bracket connected to the rotor assembly.

[0009] Preferably, the end center position of the inner drum or the position on the inner drum corresponding to the inner drum bracket is recessed inward to form a concave part, and the inner drum bracket is adapted to the concave part.

[0010] Preferably, the inner drum bracket is at least two rod-like structures arranged radially along the rotation shaft, and each rod-like structure is arranged at equal intervals in the circumferential direction of the rotation shaft.

[0011] Preferably, a hollow part is provided on the rod-like structure.

[0012] Preferably, a first bayonet is provided on the inner drum bracket, and a first bayonet is adapted to the rotor assembly.

[0013] Preferably, a second bayonet is provided on the inner drum bracket; the second bayonet is adapted to the edge of the inner drum end.

[0014] Preferably, the stator assembly is arranged inside the outer drum.

[0015] Preferably, the stator assembly is integrally formed with the outer drum.

[0016] Preferably, two bearings are provided, namely a first bearing and a second bearing, which are arranged at intervals along the axial direction of the rotation shaft.

[0017] Preferably, the stator assembly comprises a stator winding and a stator core. The stator core is arranged inside the outer drum, and the stator winding is arranged on the stator core; furthermore, the stator core is sleeved on the outer drum insert piece.

[0018] Preferably, the rotor assembly comprises a rotor housing, rotor permanent magnet, rotor yoke, and rotor encapsulation; The rotor housing is arranged on the inner drum bracket, and the first bayonet is adapted to the outer diameter of the rotor housing; The rotor permanent magnet is coaxially inserted into the rotor housing, the rotor yoke is coaxially inserted into the rotor permanent magnet, the rotor encapsulation is arranged on the rotor housing, and the rotor encapsulation is used to encapsulate the rotor housing, rotor permanent magnet, and rotor yoke.

[0019] Preferably, an outer drum insert piece is sleeved on the rotation shaft, and the outer drum insert piece is arranged inside the outer drum, with the outer rings of the bearings connected to the outer drum insert piece.

[0020] Preferably, the stator assembly is sleeved on the outer drum insert piece.

[0021] The beneficial effects of the present application: By positioning the stator assembly and rotor assembly near the first bearing and second bearing, the stability of the stator assembly and rotor assembly during operation is enhanced, reducing the vibration noise of rotating components, thereby minimizing the vibration and noise generated during the washing machine's operation. By arranging the stator assembly and rotor assembly between the outer drum and inner drum inside the washing machine, and altering the installation method of the stator assembly and rotor assembly within the washing machine, the original structure of the washing machine is simplified to improve space utilization, making the washing machine thinner and reducing its size in the thickness direction. By arranging the inner drum bracket, the inner drum bracket ensures a rigid connection between the rotor assembly and the inner drum. When the rotor assembly drives the inner drum to rotate, it can prevent deformation of the inner drum, thereby reducing the occurrence of vibration. Moreover, by configuring the concave part to fit with the inner drum bracket, it can reduce the space occupied by the inner drum bracket in the thickness of the washing machine without compromising the space utilization inside the inner drum, further reducing the thickness of the washing machine, making the overall layout of the washing machine more reasonable and the space more compact. By integrally injection molding the stator assembly inside the outer drum and then connecting the integrally injection-molded rotor assembly to the end of the inner drum, the process installation is simplified, production efficiency is improved, and production costs are reduced. Moreover, it enhances installation convenience, ensures high concentricity of each component installation, thereby improving the stability of the washing machine's use, and reducing the generation of vibration and noise; By placing the stator assembly and rotor assembly between the outer drum and the inner drum, water can flow through the gaps in the inner drum into the stator assembly and rotor assembly. The working temperature of the stator assembly and rotor assembly can be absorbed by the water, achieving heat absorption and cooling of the stator assembly and rotor assembly while heating the water inside the washing machine, thus reducing the power consumption during normal heating of the wash; By setting up a rod-like structure on the inner drum bracket and creating a hollow part, the overall support effect remains unchanged while reducing material usage and lowering production costs;

[0022] When the inner drum bracket consists of multiple rod-like structures, the annular rotor assembly is mounted on each rod-like structure, thereby forming an integrated whole with the rod-like structures, which further enhances the strength of the inner drum bracket.

[0023] With the configuration of the second bayonet, the axis of the rotation shaft on the inner drum bracket can quickly align with the axis of the inner drum during installation, ensuring the concentricity of the inner drum bracket and the inner drum is maintained, improving installation convenience, and reducing vibration issues caused by misalignment during washing machine operation.BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Below is a further explanation of the present application in conjunction with the accompanying drawings. Figure 1 is a schematic diagram of the overall partial sectional perspective enlarged structure of the present application. Figure 2 is a schematic diagram of the overall partial sectional perspective exploded enlarged structure of the present application. Figure 3 is a schematic diagram of the partial side sectional enlarged structure of the present application. Figure 4 is a schematic diagram of the enlarged structure of area A in Figure 3 of the present application. Figure 5 is a schematic diagram of the rotor assembly and inner drum bracket perspective enlarged structure of the present application.

[0025] In the figures: 1, Outer drum; 2, Inner drum; 3, Rotation shaft; 4, First Bearing; 5, Second Bearing; 6, Drive motor; 61, Stator assembly; 611, Stator winding; 612, Stator core; 62, Rotor assembly; 621, Rotor Housing; 622, Rotor Permanent Magnet; 623, Rotor Yoke; 624, Rotor Encapsulation; 7, Outer drum insert piece; 8, Inner drum bracket; 9, Screw; 10, Concave part; 11, First Bayonet; 12, Second Bayonet.DETAILED DESCRIPTION

[0026] Below, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are merely part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.

[0027] As shown in Figures 1-5, a washing machine with motor rotor integrated into inner drum, as shown in Figures 1 and 3, comprises an outer drum 1, an inner drum 2, and a drive motor 6. The end of the inner drum 2 is coaxially provided with a rotation shaft 3, on which at least one bearing is sleeved. The bearing is arranged on the outer drum 1; the drive motor 6 comprises a stator assembly 61 and a rotor assembly 62; The stator assembly 61 is arranged on the outer drum 1, and the rotor assembly 62 is coaxially arranged on the rotation shaft 3 or coaxially arranged at the end of the inner drum 2. The rotor assembly 62 is coaxially sleeved on the outside of the stator assembly 61 or coaxially inserted inside the stator assembly 61. When there is one bearing, the radial projection of the stator assembly 61 along the rotation shaft 3 partially overlaps or completely overlaps with the radial projection of the bearing along the rotation shaft 3. When the number of bearings is more than one, the radial projection of the stator assembly 61 along the rotation shaft 3 partially overlaps or completely overlaps with one of the bearings' radial projections along the rotation shaft 3, or the radial projection of the stator assembly 61 along the rotation shaft 3 is between the radial projections of the two outermost bearings along the rotation shaft 3 (the radial projection along the rotation shaft 3 is the state shown in Figure 3, observed from top to bottom, viewing the distance between the bearing and the stator assembly 61). It is understandable that, for example, in the case of two bearings, the area between the radial projections of the two outermost bearings along rotation shaft 3 is the area D shown in Figure 3.

[0028] It should be noted that by positioning the stator assembly 61 and rotor assembly 62 close to the bearings, or at least between two bearings, the rotation shaft 3 is best supported by the bearings. Therefore, when the stator assembly 61 and rotor assembly 62 are positioned close to the bearings, it ensures that the motor's stator assembly 61 and rotor assembly 62 drive the rotation shaft 3 to rotate stably, reducing the vibration noise of the rotating components, and thereby minimizing the vibration and noise generated during the operation of the washing machine.

[0029] By arranging the rotor assembly 62 on the inner drum 2 and changing the installation method of the motor inside the washing machine, the original structure of the washing machine is simplified to improve space utilization, making the washing machine thinner in thickness (i.e., the axial dimension along the inner drum 2).

[0030] As shown in Figures 1 and 3, an inner drum bracket 8 is provided between the rotation shaft 3 and the inner drum 2. The rotation shaft 3 is positioned at the center of the inner drum bracket 8, which is connected to the rotor assembly 62.

[0031] It should be noted that the inner drum bracket 8 enables a rigid connection between the rotor assembly 62 and the inner drum 2. When the rotor assembly 62 drives the inner drum 2 to rotate, it can prevent deformation of the inner drum 2, thereby reducing the generation of vibration. When the rotor assembly 62 is directly installed with the inner drum 2, the outer diameter of the rotor assembly 62 is generally smaller than the diameter of the inner drum 2, resulting in a smaller contact surface between the rotor assembly 62 and the inner drum 2. Therefore, when the rotor assembly 62 drives the inner drum 2 to rotate, it is easy for the inner drum 2 to deform, causing significant vibration noise. However, with the setup of the inner drum bracket 8, a rigid connection is formed between the entire end of the rotor assembly 62 and the inner drum 2, achieving the purpose of reducing vibration and lowering noise during operation.

[0032] As shown in Figures 1-2 and 5, the inner drum bracket 8 is connected to the rotor assembly 62 through screws 9, allowing the inner drum bracket 8 and the rotor assembly 62 to be detachable; A first bayonet 11 is provided on the inner drum bracket 8, and the first bayonet 11 is adapted to the rotor assembly 62.

[0033] It should be noted that by setting the first bayonet 11, the concentricity between the rotor assembly 62 and the rotation shaft 3 can be ensured to be nearly the same during installation with the inner drum bracket 8, preventing issues of concentricity deviation caused by installation. Moreover, through the use of screw 9, a detachable structure is formed, allowing for the replacement of rotor assembly 62 structures with different outer diameters as needed, to adapt to different motor models, thereby enhancing versatility.

[0034] As shown in Figures 2-3, the central position at the end of the inner drum 2 or the position on the inner drum 2 corresponding to the inner drum bracket 8 is recessed inward to form a concave part 10, and the inner drum bracket 8 is adapted to the concave part 10.

[0035] It should be noted that by setting the concave part 10, the top inside of the inner drum 2 is recessed inward; During washing, as the inner drum 2 rotates under the action of centrifugal force, it will drive the clothes to concentrate around the periphery. Therefore, a certain amount of free space is left in the central part of the inner drum 2. By setting the concave part 10, it is possible to reduce the space occupied by the inner drum bracket 8 in the thickness of the washing machine without reducing the space utilization of the inner drum 2, further reducing the thickness of the washing machine, making the overall layout of the washing machine more reasonable and the space more compact.

[0036] As shown in Figures 2-3 and 5, the inner drum bracket 8 is composed of at least two rod-like structures arranged radially along the rotation shaft 3, and each rod-like structure is arranged at equal intervals in the circumferential direction of the rotation shaft 3.

[0037] It should be noted that by setting the rod-like structure of the inner drum bracket 8, the overall support effect remains unchanged, reducing material usage and lowering production costs. Moreover, by setting the concave part 10 to match the rod-like structure of the inner drum bracket 8, the space utilization inside the inner drum 2 is not affected, while reducing the space occupied by the inner drum bracket 8 and improving the stability of the connection between the inner drum bracket 8 and the inner drum 2. This allows the inner drum bracket 8 to drive the inner drum 2 to rotate stably under the constraint of the concave part 10 when subjected to torque.

[0038] Furthermore, when the rotor assembly 62 is annularly mounted on the inner drum bracket, and the rotor assembly 62 is detachably connected to multiple rod-like structures on the inner drum bracket, the rod-like structures are supported by the rotor assembly 62 when the inner drum bracket is subjected to circumferential torque along the rotation shaft 3, further increasing the strength of the inner drum bracket.

[0039] As shown in Figure 5, a hollow part is provided on the rod-like structure of the inner drum bracket 8; It can be understood that this application does not limit the specific structure and installation method of the hollow part. By setting the hollow part, the use of materials is further reduced while maintaining the support strength of the inner drum bracket 8, thereby lowering production costs.

[0040] As shown in Figures 2-3 and 5, a second bayonet 12 is provided on the inner drum bracket 8; the second bayonet 12 is adapted to the edge of the end of the inner drum 2.

[0041] It should be noted that by setting the second bayonet 12, when the inner drum bracket 8 and the inner drum 2 are installed, the axis of the rotation shaft 3 on the inner drum bracket 8 can quickly coincide with the axis of the inner drum 2, ensuring the concentricity during installation, improving installation convenience, and reducing the problem of vibration during washing machine use caused by deviation in concentricity.

[0042] As shown in Figures 1-3, an outer drum insert piece 7 is sleeved on the rotation shaft 3, and the outer drum insert piece 7 is inserted into the outer drum 1. There are two bearings, namely the first bearing 4 and the second bearing 5. The first bearing 4 and the second bearing 5 are axially spaced along the rotation shaft 3, and the stator assembly 61 is arranged between the first bearing 4 and the second bearing 5. The outer rings of both the first bearing 4 and the second bearing 5 are connected to the outer drum insert piece 7, and the stator assembly 61 is sleeved on the outer drum insert piece 7. The stator assembly 61 is integrally injection molded with the outer drum 1, and the stator assembly 61 is sleeved on the outer drum insert piece 7. The outer drum insert piece 7 is used to support the inner ring of the stator assembly 61.

[0043] It should be noted that by integrally injection molding the stator assembly 61 with the outer drum 1, the process issues of reassembling the stator assembly 61 at a later stage are reduced. Additionally, the positioning accuracy of the stator assembly 61 is very high, ensuring the concentric precision between the stator assembly 61 and the inner drum bracket 8.

[0044] As shown in Figure 1-2, the stator assembly 61 is arranged inside the outer drum 1, and the stator assembly 61 is coaxially sleeved on the rotation shaft 3; the stator assembly 61 comprises a stator winding 611 and a stator core 612; The stator core 612 is arranged inside the outer drum 1, and the stator winding 611 is arranged on the stator core 612; furthermore, the stator core 612 is sleeved on the outer drum insert piece 7.

[0045] It should be noted that by integrally injection molding the stator assembly 61 with the outer drum 1, and ensuring high precision positioning through the outer drum insert piece 7, the stator assembly 61 maintains high concentricity with the outer drum insert piece 7. This, in turn, ensures high concentricity between the stator assembly 61 and the rotation shaft 3. With the rotation shaft 3 being concentrically set with the rotor assembly 62, high concentricity between the stator assembly 61 and the rotor assembly 62 can be achieved, thereby ensuring efficient and stable operation of the motor and reducing vibration during operation.

[0046] By integrally injection molding the stator assembly 61 inside the outer drum 1 and integrally injection molding the rotor assembly 62, which is connected to the end of the inner drum 2, when the motor drives the inner drum 2 to rotate, the centrifugal force allows water to flow through the gaps in the inner drum 2 into the stator assembly 61 and rotor assembly 62. The temperature of the working stator assembly 61 and rotor assembly 62 can be absorbed by the water, achieving heat absorption and cooling of the stator assembly 61 and rotor assembly 62 while simultaneously heating the water inside the washing machine. This can reduce the power consumption during normal heating cycles. Additionally, the integrally injection molded structure of the stator assembly 61 and rotor assembly 62 ensures that water does not affect their normal operation, thereby guaranteeing the longevity of the stator assembly 61 and rotor assembly 62.

[0047] As shown in Figures 1-4, the rotor assembly 62 comprises a rotor housing 621, a rotor permanent magnet 622, a rotor yoke 623, and a rotor encapsulation 624; The rotor housing 621 is connected to the inner drum bracket 8 via screws 9, meaning that the rotor housing 621 is detachably connected to multiple rod-like structures on the inner drum bracket 8, and the first bayonet 11 is adapted to the outer diameter of the rotor housing 621; The rotor permanent magnet 622 is coaxially inserted into the rotor housing 621, the rotor yoke 623 is coaxially inserted into the rotor permanent magnet 622, and the rotor encapsulation 624 is arranged in the rotor housing 621; The rotor encapsulation 624 is used to encapsulate the rotor housing 621, rotor permanent magnet 622, and rotor yoke 623.

[0048] It should be noted that by using the rotor encapsulation 624 to integrally injection-mold the components within the rotor assembly 62, and then positioning it through the first bayonet 11 on the inner drum bracket 8, the rotor assembly 62 maintains high concentricity with the inner drum bracket 8, thereby improving operational stability and reducing noise.

[0049] In the description of the present application, it should be understood that terms such as 'upper', 'lower', 'left', 'right', etc., indicating directions or positional relationships, are based on the orientations or positional relationships shown in the drawings. They are merely for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the referenced device or element must have a specific orientation or specific orientation structure and operation. Therefore, they should not be construed as limitations on the invention. In addition, 'first' and 'second' are used solely for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as 'first' and 'second' may explicitly or implicitly include one or more of these features. In the description of the present application, unless otherwise specified, the meaning of 'multiple' is two or more.

[0050] In the description of the present application, it should be noted that unless otherwise explicitly specified and defined, terms such as 'arrange', 'connect', and 'link' should be understood in a broad sense. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a mechanical connection or an electrical connection; It can be directly connected, or indirectly connected through an intermediary, and can be an internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0051] The above provides a detailed description of an embodiment of the present application, but the content is merely a preferred embodiment and should not be considered as limiting the scope of implementation of the present application. Any equivalent changes and improvements made within the scope of the claims of the present application should still fall within the patent coverage of the present application.

Examples

Embodiment Construction

[0026]Below, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are merely part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.

[0027]As shown in Figures 1-5, a washing machine with motor rotor integrated into inner drum, as shown in Figures 1 and 3, comprises an outer drum 1, an inner drum 2, and a drive motor 6. The end of the inner drum 2 is coaxially provided with a rotation shaft 3, on which at least one bearing is sleeved. The bearing is arranged on the outer drum 1; the drive motor 6 comprises a stator assembly 61 and a rotor assembly 62; The stator assembly 61 is arranged on t...

TECHNICAL FIELD

[0001] The present application relates to the technical field of washing machines, specifically to a washing machine with motor rotor integrated into inner drum.BACKGROUND

[0002] In the existing technology, the motor of a direct drive motor washing machine is directly connected to the drum, eliminating the belt and pulley, thereby improving energy efficiency.

[0003] However, the aforementioned direct drive motor washing machines still have the following defects: (1) Installation difficulty: The stator and rotor are independent components. The stator is fixed to the housing with screws and positioning pins, while the rotor is fixed to the rotating rotation shaft through the rotor housing. The installation position of the direct drive motor is usually limited, requiring careful consideration of the motor's position during the design phase. This may increase the overall design complexity of the washing machine and may also limit its use in certain spaces or scenarios. (2) Large size: The direct drive motor is currently installed on the outside of the washing machine, and the rotation shaft system is relatively long, resulting in a large thickness dimension of the washing machine, making it difficult to control the overall size of the washing machine. (3) Complex production process: Currently, the direct drive motor is assembled after the inner and outer drums are completed. The stator and rotor of the direct drive motor, as independent components, need to be fixed and assembled separately using screws or pins, making the production process relatively complex. (4) Poor assembly precision: Since the stator and rotor of the motor must ensure uniform air gaps, they must be concentric with the rotation shaft of the inner drum tripod. Currently, the stator is independently injection molded, and the rotor support is sheet metal formed. The dimensional accuracy is difficult to control, which can easily lead to inaccurate positioning and uneven air gaps, causing vibration and noise. SUMMARY

[0004] To overcome the aforementioned technical problems, the purpose of the present application is to provide a washing machine with motor rotor integrated into inner drum, aimed at solving the issues of vibration and noise that occur during the operation of existing washing machines as mentioned in the background technology.

[0005] The objective of the present application can be achieved through the following technical solutions: A washing machine with motor rotor integrated into inner drum, comprising an outer drum, an inner drum, and a drive motor, wherein the end of the inner drum is coaxially provided with a rotation shaft, and at least one bearing is sleeved on the rotation shaft, and the bearing is arranged on the outer drum; The drive motor comprises a stator assembly and a rotor assembly; The stator assembly is arranged in the outer drum, and the rotor assembly is coaxially arranged on the rotation shaft or coaxially arranged at the end of the inner drum. Additionally, the rotor assembly is coaxially sleeved on the outside of the stator assembly or coaxially inserted into the inside of the stator assembly.

[0006] When one bearing is provided, a radial projection of the stator assembly along the rotation shaft partially overlaps or completely overlaps with a radial projection of the bearing along the rotation shaft.

[0007] When the number of bearings is more than one, the radial projection of the stator assembly along the rotation shaft partially overlaps or completely overlaps with one of the bearings' radial projections along the rotation shaft, or the radial projection of the stator assembly along the rotation shaft is between the radial projections of the two outermost bearings along the rotation shaft.

[0008] Preferably, an inner drum bracket is provided between the rotation shaft and the inner drum, with the rotation shaft positioned at the center of the inner drum bracket, and the inner drum bracket connected to the rotor assembly.

[0009] Preferably, the end center position of the inner drum or the position on the inner drum corresponding to the inner drum bracket is recessed inward to form a concave part, and the inner drum bracket is adapted to the concave part.

[0010] Preferably, the inner drum bracket is at least two rod-like structures arranged radially along the rotation shaft, and each rod-like structure is arranged at equal intervals in the circumferential direction of the rotation shaft.

[0011] Preferably, a hollow part is provided on the rod-like structure.

[0012] Preferably, a first bayonet is provided on the inner drum bracket, and a first bayonet is adapted to the rotor assembly.

[0013] Preferably, a second bayonet is provided on the inner drum bracket; the second bayonet is adapted to the edge of the inner drum end.

[0014] Preferably, the stator assembly is arranged inside the outer drum.

[0015] Preferably, the stator assembly is integrally formed with the outer drum.

[0016] Preferably, two bearings are provided, namely a first bearing and a second bearing, which are arranged at intervals along the axial direction of the rotation shaft.

[0017] Preferably, the stator assembly comprises a stator winding and a stator core. The stator core is arranged inside the outer drum, and the stator winding is arranged on the stator core; furthermore, the stator core is sleeved on the outer drum insert piece.

[0018] Preferably, the rotor assembly comprises a rotor housing, rotor permanent magnet, rotor yoke, and rotor encapsulation; The rotor housing is arranged on the inner drum bracket, and the first bayonet is adapted to the outer diameter of the rotor housing; The rotor permanent magnet is coaxially inserted into the rotor housing, the rotor yoke is coaxially inserted into the rotor permanent magnet, the rotor encapsulation is arranged on the rotor housing, and the rotor encapsulation is used to encapsulate the rotor housing, rotor permanent magnet, and rotor yoke.

[0019] Preferably, an outer drum insert piece is sleeved on the rotation shaft, and the outer drum insert piece is arranged inside the outer drum, with the outer rings of the bearings connected to the outer drum insert piece.

[0020] Preferably, the stator assembly is sleeved on the outer drum insert piece.

[0021] The beneficial effects of the present application: By positioning the stator assembly and rotor assembly near the first bearing and second bearing, the stability of the stator assembly and rotor assembly during operation is enhanced, reducing the vibration noise of rotating components, thereby minimizing the vibration and noise generated during the washing machine's operation. By arranging the stator assembly and rotor assembly between the outer drum and inner drum inside the washing machine, and altering the installation method of the stator assembly and rotor assembly within the washing machine, the original structure of the washing machine is simplified to improve space utilization, making the washing machine thinner and reducing its size in the thickness direction. By arranging the inner drum bracket, the inner drum bracket ensures a rigid connection between the rotor assembly and the inner drum. When the rotor assembly drives the inner drum to rotate, it can prevent deformation of the inner drum, thereby reducing the occurrence of vibration. Moreover, by configuring the concave part to fit with the inner drum bracket, it can reduce the space occupied by the inner drum bracket in the thickness of the washing machine without compromising the space utilization inside the inner drum, further reducing the thickness of the washing machine, making the overall layout of the washing machine more reasonable and the space more compact. By integrally injection molding the stator assembly inside the outer drum and then connecting the integrally injection-molded rotor assembly to the end of the inner drum, the process installation is simplified, production efficiency is improved, and production costs are reduced. Moreover, it enhances installation convenience, ensures high concentricity of each component installation, thereby improving the stability of the washing machine's use, and reducing the generation of vibration and noise; By placing the stator assembly and rotor assembly between the outer drum and the inner drum, water can flow through the gaps in the inner drum into the stator assembly and rotor assembly. The working temperature of the stator assembly and rotor assembly can be absorbed by the water, achieving heat absorption and cooling of the stator assembly and rotor assembly while heating the water inside the washing machine, thus reducing the power consumption during normal heating of the wash; By setting up a rod-like structure on the inner drum bracket and creating a hollow part, the overall support effect remains unchanged while reducing material usage and lowering production costs;

[0022] When the inner drum bracket consists of multiple rod-like structures, the annular rotor assembly is mounted on each rod-like structure, thereby forming an integrated whole with the rod-like structures, which further enhances the strength of the inner drum bracket.

[0023] With the configuration of the second bayonet, the axis of the rotation shaft on the inner drum bracket can quickly align with the axis of the inner drum during installation, ensuring the concentricity of the inner drum bracket and the inner drum is maintained, improving installation convenience, and reducing vibration issues caused by misalignment during washing machine operation.BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Below is a further explanation of the present application in conjunction with the accompanying drawings. Figure 1 is a schematic diagram of the overall partial sectional perspective enlarged structure of the present application. Figure 2 is a schematic diagram of the overall partial sectional perspective exploded enlarged structure of the present application. Figure 3 is a schematic diagram of the partial side sectional enlarged structure of the present application. Figure 4 is a schematic diagram of the enlarged structure of area A in Figure 3 of the present application. Figure 5 is a schematic diagram of the rotor assembly and inner drum bracket perspective enlarged structure of the present application.

[0025] In the figures: 1, Outer drum; 2, Inner drum; 3, Rotation shaft; 4, First Bearing; 5, Second Bearing; 6, Drive motor; 61, Stator assembly; 611, Stator winding; 612, Stator core; 62, Rotor assembly; 621, Rotor Housing; 622, Rotor Permanent Magnet; 623, Rotor Yoke; 624, Rotor Encapsulation; 7, Outer drum insert piece; 8, Inner drum bracket; 9, Screw; 10, Concave part; 11, First Bayonet; 12, Second Bayonet.DETAILED DESCRIPTION

[0026] Below, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are merely part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.

[0027] As shown in Figures 1-5, a washing machine with motor rotor integrated into inner drum, as shown in Figures 1 and 3, comprises an outer drum 1, an inner drum 2, and a drive motor 6. The end of the inner drum 2 is coaxially provided with a rotation shaft 3, on which at least one bearing is sleeved. The bearing is arranged on the outer drum 1; the drive motor 6 comprises a stator assembly 61 and a rotor assembly 62; The stator assembly 61 is arranged on the outer drum 1, and the rotor assembly 62 is coaxially arranged on the rotation shaft 3 or coaxially arranged at the end of the inner drum 2. The rotor assembly 62 is coaxially sleeved on the outside of the stator assembly 61 or coaxially inserted inside the stator assembly 61. When there is one bearing, the radial projection of the stator assembly 61 along the rotation shaft 3 partially overlaps or completely overlaps with the radial projection of the bearing along the rotation shaft 3. When the number of bearings is more than one, the radial projection of the stator assembly 61 along the rotation shaft 3 partially overlaps or completely overlaps with one of the bearings' radial projections along the rotation shaft 3, or the radial projection of the stator assembly 61 along the rotation shaft 3 is between the radial projections of the two outermost bearings along the rotation shaft 3 (the radial projection along the rotation shaft 3 is the state shown in Figure 3, observed from top to bottom, viewing the distance between the bearing and the stator assembly 61). It is understandable that, for example, in the case of two bearings, the area between the radial projections of the two outermost bearings along rotation shaft 3 is the area D shown in Figure 3.

[0028] It should be noted that by positioning the stator assembly 61 and rotor assembly 62 close to the bearings, or at least between two bearings, the rotation shaft 3 is best supported by the bearings. Therefore, when the stator assembly 61 and rotor assembly 62 are positioned close to the bearings, it ensures that the motor's stator assembly 61 and rotor assembly 62 drive the rotation shaft 3 to rotate stably, reducing the vibration noise of the rotating components, and thereby minimizing the vibration and noise generated during the operation of the washing machine.

[0029] By arranging the rotor assembly 62 on the inner drum 2 and changing the installation method of the motor inside the washing machine, the original structure of the washing machine is simplified to improve space utilization, making the washing machine thinner in thickness (i.e., the axial dimension along the inner drum 2).

[0030] As shown in Figures 1 and 3, an inner drum bracket 8 is provided between the rotation shaft 3 and the inner drum 2. The rotation shaft 3 is positioned at the center of the inner drum bracket 8, which is connected to the rotor assembly 62.

[0031] It should be noted that the inner drum bracket 8 enables a rigid connection between the rotor assembly 62 and the inner drum 2. When the rotor assembly 62 drives the inner drum 2 to rotate, it can prevent deformation of the inner drum 2, thereby reducing the generation of vibration. When the rotor assembly 62 is directly installed with the inner drum 2, the outer diameter of the rotor assembly 62 is generally smaller than the diameter of the inner drum 2, resulting in a smaller contact surface between the rotor assembly 62 and the inner drum 2. Therefore, when the rotor assembly 62 drives the inner drum 2 to rotate, it is easy for the inner drum 2 to deform, causing significant vibration noise. However, with the setup of the inner drum bracket 8, a rigid connection is formed between the entire end of the rotor assembly 62 and the inner drum 2, achieving the purpose of reducing vibration and lowering noise during operation.

[0032] As shown in Figures 1-2 and 5, the inner drum bracket 8 is connected to the rotor assembly 62 through screws 9, allowing the inner drum bracket 8 and the rotor assembly 62 to be detachable; A first bayonet 11 is provided on the inner drum bracket 8, and the first bayonet 11 is adapted to the rotor assembly 62.

[0033] It should be noted that by setting the first bayonet 11, the concentricity between the rotor assembly 62 and the rotation shaft 3 can be ensured to be nearly the same during installation with the inner drum bracket 8, preventing issues of concentricity deviation caused by installation. Moreover, through the use of screw 9, a detachable structure is formed, allowing for the replacement of rotor assembly 62 structures with different outer diameters as needed, to adapt to different motor models, thereby enhancing versatility.

[0034] As shown in Figures 2-3, the central position at the end of the inner drum 2 or the position on the inner drum 2 corresponding to the inner drum bracket 8 is recessed inward to form a concave part 10, and the inner drum bracket 8 is adapted to the concave part 10.

[0035] It should be noted that by setting the concave part 10, the top inside of the inner drum 2 is recessed inward; During washing, as the inner drum 2 rotates under the action of centrifugal force, it will drive the clothes to concentrate around the periphery. Therefore, a certain amount of free space is left in the central part of the inner drum 2. By setting the concave part 10, it is possible to reduce the space occupied by the inner drum bracket 8 in the thickness of the washing machine without reducing the space utilization of the inner drum 2, further reducing the thickness of the washing machine, making the overall layout of the washing machine more reasonable and the space more compact.

[0036] As shown in Figures 2-3 and 5, the inner drum bracket 8 is composed of at least two rod-like structures arranged radially along the rotation shaft 3, and each rod-like structure is arranged at equal intervals in the circumferential direction of the rotation shaft 3.

[0037] It should be noted that by setting the rod-like structure of the inner drum bracket 8, the overall support effect remains unchanged, reducing material usage and lowering production costs. Moreover, by setting the concave part 10 to match the rod-like structure of the inner drum bracket 8, the space utilization inside the inner drum 2 is not affected, while reducing the space occupied by the inner drum bracket 8 and improving the stability of the connection between the inner drum bracket 8 and the inner drum 2. This allows the inner drum bracket 8 to drive the inner drum 2 to rotate stably under the constraint of the concave part 10 when subjected to torque.

[0038] Furthermore, when the rotor assembly 62 is annularly mounted on the inner drum bracket, and the rotor assembly 62 is detachably connected to multiple rod-like structures on the inner drum bracket, the rod-like structures are supported by the rotor assembly 62 when the inner drum bracket is subjected to circumferential torque along the rotation shaft 3, further increasing the strength of the inner drum bracket.

[0039] As shown in Figure 5, a hollow part is provided on the rod-like structure of the inner drum bracket 8; It can be understood that this application does not limit the specific structure and installation method of the hollow part. By setting the hollow part, the use of materials is further reduced while maintaining the support strength of the inner drum bracket 8, thereby lowering production costs.

[0040] As shown in Figures 2-3 and 5, a second bayonet 12 is provided on the inner drum bracket 8; the second bayonet 12 is adapted to the edge of the end of the inner drum 2.

[0041] It should be noted that by setting the second bayonet 12, when the inner drum bracket 8 and the inner drum 2 are installed, the axis of the rotation shaft 3 on the inner drum bracket 8 can quickly coincide with the axis of the inner drum 2, ensuring the concentricity during installation, improving installation convenience, and reducing the problem of vibration during washing machine use caused by deviation in concentricity.

[0042] As shown in Figures 1-3, an outer drum insert piece 7 is sleeved on the rotation shaft 3, and the outer drum insert piece 7 is inserted into the outer drum 1. There are two bearings, namely the first bearing 4 and the second bearing 5. The first bearing 4 and the second bearing 5 are axially spaced along the rotation shaft 3, and the stator assembly 61 is arranged between the first bearing 4 and the second bearing 5. The outer rings of both the first bearing 4 and the second bearing 5 are connected to the outer drum insert piece 7, and the stator assembly 61 is sleeved on the outer drum insert piece 7. The stator assembly 61 is integrally injection molded with the outer drum 1, and the stator assembly 61 is sleeved on the outer drum insert piece 7. The outer drum insert piece 7 is used to support the inner ring of the stator assembly 61.

[0043] It should be noted that by integrally injection molding the stator assembly 61 with the outer drum 1, the process issues of reassembling the stator assembly 61 at a later stage are reduced. Additionally, the positioning accuracy of the stator assembly 61 is very high, ensuring the concentric precision between the stator assembly 61 and the inner drum bracket 8.

[0044] As shown in Figure 1-2, the stator assembly 61 is arranged inside the outer drum 1, and the stator assembly 61 is coaxially sleeved on the rotation shaft 3; the stator assembly 61 comprises a stator winding 611 and a stator core 612; The stator core 612 is arranged inside the outer drum 1, and the stator winding 611 is arranged on the stator core 612; furthermore, the stator core 612 is sleeved on the outer drum insert piece 7.

[0045] It should be noted that by integrally injection molding the stator assembly 61 with the outer drum 1, and ensuring high precision positioning through the outer drum insert piece 7, the stator assembly 61 maintains high concentricity with the outer drum insert piece 7. This, in turn, ensures high concentricity between the stator assembly 61 and the rotation shaft 3. With the rotation shaft 3 being concentrically set with the rotor assembly 62, high concentricity between the stator assembly 61 and the rotor assembly 62 can be achieved, thereby ensuring efficient and stable operation of the motor and reducing vibration during operation.

[0046] By integrally injection molding the stator assembly 61 inside the outer drum 1 and integrally injection molding the rotor assembly 62, which is connected to the end of the inner drum 2, when the motor drives the inner drum 2 to rotate, the centrifugal force allows water to flow through the gaps in the inner drum 2 into the stator assembly 61 and rotor assembly 62. The temperature of the working stator assembly 61 and rotor assembly 62 can be absorbed by the water, achieving heat absorption and cooling of the stator assembly 61 and rotor assembly 62 while simultaneously heating the water inside the washing machine. This can reduce the power consumption during normal heating cycles. Additionally, the integrally injection molded structure of the stator assembly 61 and rotor assembly 62 ensures that water does not affect their normal operation, thereby guaranteeing the longevity of the stator assembly 61 and rotor assembly 62.

[0047] As shown in Figures 1-4, the rotor assembly 62 comprises a rotor housing 621, a rotor permanent magnet 622, a rotor yoke 623, and a rotor encapsulation 624; The rotor housing 621 is connected to the inner drum bracket 8 via screws 9, meaning that the rotor housing 621 is detachably connected to multiple rod-like structures on the inner drum bracket 8, and the first bayonet 11 is adapted to the outer diameter of the rotor housing 621; The rotor permanent magnet 622 is coaxially inserted into the rotor housing 621, the rotor yoke 623 is coaxially inserted into the rotor permanent magnet 622, and the rotor encapsulation 624 is arranged in the rotor housing 621; The rotor encapsulation 624 is used to encapsulate the rotor housing 621, rotor permanent magnet 622, and rotor yoke 623.

[0048] It should be noted that by using the rotor encapsulation 624 to integrally injection-mold the components within the rotor assembly 62, and then positioning it through the first bayonet 11 on the inner drum bracket 8, the rotor assembly 62 maintains high concentricity with the inner drum bracket 8, thereby improving operational stability and reducing noise.

[0049] In the description of the present application, it should be understood that terms such as 'upper', 'lower', 'left', 'right', etc., indicating directions or positional relationships, are based on the orientations or positional relationships shown in the drawings. They are merely for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the referenced device or element must have a specific orientation or specific orientation structure and operation. Therefore, they should not be construed as limitations on the invention. In addition, 'first' and 'second' are used solely for descriptive purposes and should not be understood as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined as 'first' and 'second' may explicitly or implicitly include one or more of these features. In the description of the present application, unless otherwise specified, the meaning of 'multiple' is two or more.

[0050] In the description of the present application, it should be noted that unless otherwise explicitly specified and defined, terms such as 'arrange', 'connect', and 'link' should be understood in a broad sense. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can be a mechanical connection or an electrical connection; It can be directly connected, or indirectly connected through an intermediary, and can be an internal connection of two components. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0051] The above provides a detailed description of an embodiment of the present application, but the content is merely a preferred embodiment and should not be considered as limiting the scope of implementation of the present application. Any equivalent changes and improvements made within the scope of the claims of the present application should still fall within the patent coverage of the present application.

Examples

Embodiment Construction

[0026]Below, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are merely part of the embodiments of the present application, not all of them. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.

[0027]As shown in Figures 1-5, a washing machine with motor rotor integrated into inner drum, as shown in Figures 1 and 3, comprises an outer drum 1, an inner drum 2, and a drive motor 6. The end of the inner drum 2 is coaxially provided with a rotation shaft 3, on which at least one bearing is sleeved. The bearing is arranged on the outer drum 1; the drive motor 6 comprises a stator assembly 61 and a rotor assembly 62; The stator assembly 61 is arranged on t...

Claims

1. A washing machine with motor rotor integrated into inner drum, comprising an outer drum (1), an inner drum (2), and a drive motor (6), characterized in that the end of the inner drum (2) is coaxially provided with a rotation shaft (3), on which at least one bearing is sleeved, and the bearing is arranged on the outer drum (1); wherein the drive motor (6) comprises a stator assembly (61) and a rotor assembly (62); the stator assembly (61) is arranged in the outer drum (1), and the rotor assembly (62) is coaxially arranged on the rotation shaft (3) or coaxially arranged at the end of the inner drum (2), and the rotor assembly (62) is coaxially sleeved on the outside of the stator assembly (61) or coaxially inserted into the inside of the stator assembly (61); when one bearing is provided, a radial projection of the stator assembly (61) along the rotation shaft (3) partially overlaps or completely overlaps with a radial projection of the bearing along the rotation shaft (3); when the number of bearings is more than one, the radial projection of the stator assembly (61) along the rotation shaft (3) partially overlaps or completely overlaps with one of the bearings' radial projections along the rotation shaft (3), or the radial projection of the stator assembly (61) along the rotation shaft (3) is between the radial projections of the two outermost bearings along the rotation shaft (3).

2. The washing machine with motor rotor integrated into inner drum according to claim 1, characterized in that an inner drum bracket (8) is provided between the rotation shaft (3) and the inner drum (2), the rotation shaft (3) is positioned at the center of the inner drum bracket (8), and the inner drum bracket (8) is connected to the rotor assembly (62).

3. The washing machine with motor rotor integrated into inner drum according to claim 2, characterized in that the end center position of the inner drum (2) or the position on the inner drum (2) corresponding to the inner drum bracket (8) is recessed inward to form a concave part (10), and the inner drum bracket (8) is adapted to the concave part (10).

4. The washing machine with motor rotor integrated into inner drum according to claim 2, characterized in that the inner drum bracket (8) is at least two rod-like structures arranged radially along the rotation shaft (3), with each rod-like structure arranged at equal intervals in the circumferential direction of the rotation shaft (3), and the rotor assembly (62) is detachably arranged on each of the rod-like structures.

5. The washing machine with motor rotor integrated into inner drum according to claim 4, characterized in that a hollow part is provided on the rod-like structure.

6. The washing machine with motor rotor integrated into inner drum according to claim 2, characterized in that the inner drum bracket (8) is provided with a first bayonet (11), the first bayonet (11) is adapted to the rotor assembly (62).

7. The washing machine with motor rotor integrated into inner drum according to claim 2, characterized in that the inner drum bracket (8) is provided with a second bayonet (12); the second bayonet (12) is adapted to the edge of the end of the inner drum (2).

8. The washing machine with motor rotor integrated into inner drum according to claim 1, characterized in that the stator assembly (61) is arranged inside the outer drum (1).

9. The washing machine with motor rotor integrated into inner drum according to claim 8, characterized in that the stator assembly (61) is integrally formed with the outer drum (1).

10. The washing machine with motor rotor integrated into inner drum according to claim 1, characterized in that two bearings are provided, namely a first bearing (4) and a second bearing (5), which are axially spaced along the rotation shaft (3).

11. The washing machine with motor rotor integrated into inner drum according to claim 1, characterized in that the stator assembly (61) comprises a stator winding (611) and a stator core (612); wherein the stator core (612) is arranged inside the outer drum (1), and the stator winding (611) is arranged on the stator core (612); furthermore, the stator core (612) is sleeved on an outer drum insert piece (7).

12. The washing machine with motor rotor integrated into inner drum according to claim 6, characterized in that the rotor assembly (62) comprises a rotor housing (621), a rotor permanent magnet (622), a rotor yoke (623), and a rotor encapsulation (624); wherein the rotor housing (621) is arranged on the inner drum bracket (8), and the first bayonet (11) is adapted to the outer diameter of the rotor housing (621); wherein the rotor permanent magnet (622) is coaxially inserted into the rotor housing (621), the rotor yoke (623) is coaxially inserted into the rotor permanent magnet (622), and the rotor encapsulation (624) is arranged on the rotor housing (621), wherein the rotor encapsulation (624) is configured to encapsulate the rotor housing (621), rotor permanent magnet (622), and rotor yoke (623).

13. The washing machine with motor rotor integrated into inner drum according to any one of claims 1-12, characterized in that the outer drum insert piece (7) is sleeved on the rotation shaft (3), and the outer drum insert piece (7) is arranged inside the outer drum (1), with an outer ring of the bearing connected to the outer drum insert piece (7).

14. The washing machine with motor rotor integrated into inner drum according to claim 13, characterized in that the stator assembly (61) is sleeved on the outer drum insert piece (7).

Images