Motor of washing equipment

Abstract

The invention discloses a motor of washing equipment, the motor comprises a shell assembly with an end cover and a rotor assembly arranged in the shell and rotatably connected with the end cover, the end cover is provided with a mounting groove, a rotating shaft of the rotor assembly is inserted in the mounting groove, and a vibration reduction structure is sleeved between the mounting groove and the rotating shaft. According to the rotor assembly, the mounting groove is formed in the end cover, and the vibration reduction structure surrounding the rotating shaft is arranged between the inner circumferential surface of the mounting groove and the outer circumferential surface of the rotating shaft, so that the vibration reduction structure can buffer the deviation of the rotating shaft in the radial direction, absorb the vibration energy of the rotor and play a role in damping the rotor in the high-speed rotating process of the rotor assembly; and vibration energy accumulation and vibration amplitude increase are avoided, so that vibration energy is absorbed, the rotor assembly is prevented from impacting and rubbing the shell assembly, noise and power loss during high-speed rotation of the motor are greatly reduced, and it is ensured that the motor can well operate in a full-rotation-speed range.

Description

Technical Field

[0001] The present invention belongs to the technical field of washing equipment, and specifically relates to a motor for a washing equipment. Background Art

[0002] In the prior art, a motor generally includes two parts: a rotor and a stator. Among them, the rotor is rotatably inserted through the housing of the motor by bearings sleeved at both ends of its rotating shaft. To ensure that the rotor can rotate flexibly, gaps are left between the rotor and the housing in the axial and radial directions.

[0003] However, such a motor structure is only applicable to the case of relatively low rotational speeds. As users' requirements for the cleaning function of washing equipment are getting higher and higher, it is necessary to ensure that the motor of the washing equipment can maintain relatively low vibrations under the condition of high-speed operation.

[0004] Chinese Utility Model Patent No. 201020691441.8 discloses a vibration reduction and noise reduction structure for a motor rotor, which is applicable to small-power or micro induction motors. It includes a rotor and a rotating shaft. The rotor is fixedly sleeved with the rotating shaft. The rotating shaft is pivotally connected to the bearing and one end passes through the bearing to form an output shaft. The vibration reduction and noise reduction structure of the motor rotor further includes a vibration reduction device. The vibration reduction device is symmetrically arranged between the rotor and the bearing respectively, and includes a retaining ring and an elastic element. The retaining ring is sleeved on the rotating shaft. The elastic element is sleeved on the rotating shaft and one end abuts against the retaining ring, and the other end abuts against the end face of the bearing. The vibration reduction and noise reduction structure in this utility model can achieve the vibration reduction effect of the rotor in its axial direction.

[0005] However, in actual production, the rotor always has a certain residual unbalance due to reasons such as manufacturing precision. Therefore, the inertial axis during the rotation of the rotor always deviates from its actual central axis. During the high-speed rotation of the rotor, it always swings back and forth radially relative to its actual central axis, forming an excitation source, causing strong vibrations and increased noise of the motor, thereby increasing power loss.

[0006] In view of this, the present invention is specifically proposed. Summary of the Invention

[0007] The purpose of the present invention is to provide a motor for a washing equipment, so as to achieve the purpose of buffering the radial vibrations generated during the high-speed rotation of the rotor, absorbing the vibration energy to avoid the rotor hitting and rubbing against the housing, thereby reducing noise and power loss.

[0008] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0009] A motor for a washing device, comprising a housing assembly having end caps and a rotor assembly disposed inside the housing and rotatably connected to the end caps. The end cap is provided with an installation groove, the rotating shaft of the rotor assembly is inserted into the installation groove, and a damping structure is sleeved between the installation groove and the rotating shaft.

[0010] Further, a groove is formed on the inner peripheral surface of the installation groove, or a rigid sleeve is sleeved in the installation groove, and a groove is formed on the inner peripheral surface of the rigid sleeve;

[0011] The damping structure includes a collar, and the collar is embedded in the groove and abuts against the rotating shaft.

[0012] Further, the groove extends circumferentially along the inner peripheral surface of the installation groove or the rigid sleeve to form a closed ring, and the collar is correspondingly set as a ring shape;

[0013] Or, the groove extends axially along the inner peripheral surface of the installation groove or the rigid sleeve, and the collar is correspondingly set as a strip shape.

[0014] Further, the cross-section of the groove perpendicular to the extension direction is rectangular, the cross-section of the collar perpendicular to the length direction is circular, and the circular diameter of the collar is greater than the rectangular width of the groove;

[0015] The collar protrudes from the inner peripheral surface along the diameter direction of the installation groove, or protrudes from the inner peripheral surface along the diameter direction of the rigid sleeve.

[0016] Further, a rolling bearing is sleeved on the rotating shaft, and there is a gap between the outer peripheral surface of the rolling bearing and the inner peripheral surface of the damping mechanism.

[0017] Further, the gap between the outer peripheral surface of the rolling bearing and the installation groove or the rigid sleeve is filled with viscous grease.

[0018] Further, an elastic member is embedded between the bottom surface of the installation groove and the end surface of the rolling bearing.

[0019] Further, the elastic member is set as a circular ring and sleeved on the rotating shaft, and the end surface of the elastic member is a curved surface and undulates up and down in a wave shape along the circumference of the end surface.

[0020] Further, the housing assembly includes a hollow sleeve, end caps are respectively provided at both ends of the sleeve, and the end surface of the end cap provided with the installation groove is connected to the sleeve;

[0021] A stator assembly is embedded in the hollow hole of the sleeve, the rotor assembly passes through the center of the stator assembly, and the gap between the two is greater than the radial displacement of the rotating shaft in the damping structure.

[0022] Further, a rotation stopping groove is provided on the outer peripheral surface of the stator assembly. The rotation stopping groove extends axially through both ends of the stator assembly. A convex portion extending along its axial direction is provided on the inner peripheral surface of the sleeve. When the stator assembly is sleeved with the sleeve, the rotation stopping groove is engaged with the convex portion.

[0023] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0024] 1. An installation groove is provided on the end cover, and a vibration damping structure surrounding the rotating shaft is provided between the inner peripheral surface of the installation groove and the outer peripheral surface of the rotating shaft. During the high-speed rotation of the rotor assembly, the vibration damping structure can buffer the radial offset of the rotating shaft, absorb the vibration energy of the rotor, play a damping role on the rotor, avoid the accumulation of vibration energy and the increase of vibration amplitude, thereby absorbing the vibration energy and preventing the rotor assembly from hitting and rubbing against the housing assembly, greatly reducing the noise and power loss of the motor during high-speed rotation, and ensuring that the motor can operate well within the full speed range.

[0025] 2. By providing a ferrule in the circumferential direction of the rotating shaft, the vibration damping structure can buffer and absorb vibration from the radial direction of the rotating shaft. Moreover, the ferrule is made of an elastic material and can perform non-linear damping and vibration reduction on the vibration of the rotating shaft within the deformation range, so that the vibration damping structure has more stable vibration damping performance, ensuring that the motor can work well within a large speed range.

[0026] 3. Filling viscous grease in the gap can adhere the outer bearing ring of the rolling bearing to the inner peripheral surface of the installation groove, increase the friction between the outer bearing ring of the rolling bearing and the installation groove, avoid the relative rotation of the outer bearing ring of the rolling bearing with respect to the inner peripheral surface of the installation groove during the high-speed rotation of the rotor, and further reduce the vibration noise of the rotating shaft.

[0027] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings, as a part of the present invention, are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention, but do not constitute an improper limitation to the present invention. Obviously, the accompanying drawings in the following description are only some embodiments, and those of ordinary skill in the art can also obtain other drawings based on these drawings without creative efforts. In the accompanying drawings:

[0029] Figure 1 is a schematic structural diagram of a motor of a washing device in the present invention;

[0030] Figure 2 is a cross-sectional view of a motor of a washing device in the present invention;

[0031] Figure 3Yes Figure 2 Schematic diagram of the partial structure A of the motor in

[0032] Figure 4 Yes Figure 2 Schematic diagram of the partial structure B of the motor in

[0033] Wherein: 100, stator assembly; 110, anti-rotation groove; 200, rotor assembly; 210, rotating shaft; 220, rotor; 221, cooling part; 230, positioning retaining ring; 240, retaining ring groove; 250, fitting stripes; 300, housing assembly; 310, sleeve; 311, convex part; 320, end cover; 321, mounting groove; 331, speed measurement terminal; 332, speed measurement magnetic head; 341, shock pad; 342, fixing tube; 400, vibration damping structure; 410, groove; 420, ferrule; 430, rigid sleeve; 440, rolling bearing; 450, viscous grease; 460, elastic part.

[0034] It should be noted that these drawings and textual descriptions are not intended to limit the scope of the concept of the present invention in any way, but to illustrate the concept of the present invention to those skilled in the art by reference to specific embodiments. Detailed implementation manners

[0035] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0036] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by terms such as "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0037] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "contact", "communication" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0038] Embodiment 1

[0039] As Figure 1 shown, in the embodiment of the present invention, a motor for a washing device is introduced.

[0040] The motor includes a housing assembly 300, a stator assembly 100, and a rotor assembly 200. The stator assembly 100 is fixed within the housing assembly 300, and the rotor assembly 200 is rotatably embedded in the center of the stator assembly 100 and is rotatably connected to the end cap 320 in the housing assembly 300.

[0041] Specifically, the housing assembly 300 includes a hollow sleeve 310 and end caps 320 fixed to both ends of the sleeve 310. The stator assembly 100 includes a cylinder formed by stacking a plurality of silicon steel sheets and a conductive coil wound around the inner circumference of the cylinder. Moreover, a rotation stopping groove 110 recessed radially toward the central axis of the cylinder is provided on the outer peripheral surface of the cylinder. The rotation stopping groove 110 extends along the axial direction of the cylinder.

[0042] In addition, an installation groove 321 recessed from the plane center of the end cap 320 toward the inside of the end cap 320 is provided on the end cap 320. And there is an annular gap between the inner peripheral surface of the installation groove 321 and the outer peripheral surface of the rotating shaft 210. In order to buffer and absorb the displacement and vibration of the rotating shaft 210 in its radial direction, a vibration damping structure 400 is sleeved between the inner peripheral surface of the installation groove 321 and the outer peripheral surface of the rotating shaft 210.

[0043] In this embodiment, an installation groove 321 is formed on the end cap 320, and a vibration damping structure 400 surrounding the rotating shaft 210 is provided between the inner peripheral surface of the installation groove 321 and the outer peripheral surface of the rotating shaft 210. During the high-speed rotation of the rotor assembly 200, the vibration damping structure 400 can buffer the radial offset of the rotating shaft 210, absorb the vibration energy of the rotor 220, play a damping role on the rotor 220, avoid the accumulation of vibration energy and the increase of vibration amplitude, thereby absorbing the vibration energy and preventing the rotor assembly 200 from hitting and rubbing against the housing assembly 300, greatly reducing the noise and power loss of the motor during high-speed rotation, and ensuring that the motor can operate well within the full speed range.

[0044] As Figure 1 and Figure 3 shown, in the embodiments of the present invention, a vibration damping structure 400 in a motor of a washing device is introduced.

[0045] The vibration damping structure 400 includes a groove 410 and a collar 420. Among them, the groove 410 can be formed on the inner peripheral surface of the installation groove 321 for installing and fixing the collar 420.

[0046] In addition, the collar 420 is made of a material with elastic restoring force. At the same time, the width of the collar 420 in the radial direction is greater than the depth of the groove 410. In this way, the collar 420 embedded in the groove 410 can protrude radially from the inner peripheral surface of the installation groove 321 and abut against the outer peripheral surface of the rotating shaft 210.

[0047] In this way, when the rotating shaft 210 of the rotor assembly 200 passes through the damping structure 400, the ferrule 420 can support the rotating shaft 210 from the outer periphery and buffer the deviation force of the rotating shaft 210.

[0048] Furthermore, the groove 410 can extend circumferentially along the inner peripheral surface of the installation groove 321 to form a ring shape; the groove 410 can also extend axially along the inner peripheral surface of the installation groove 321 to form a strip shape.

[0049] When the groove 410 extends axially along the inner peripheral surface of the installation groove 321, a plurality of grooves 410 can be opened in the circumferential direction of the inner peripheral surface of the installation groove 321 and evenly distributed on the inner peripheral surface of the installation groove 321. Correspondingly, the ferrule 420 is arranged as a strip shape embedded in the groove 410. In this way, a plurality of ferrules 420 are discretely distributed on the inner peripheral surface of the installation groove 321 and can abut against the rotating shaft 210 from the outer periphery of the rotating shaft 210.

[0050] Preferably, when the groove 410 extends circumferentially along the inner peripheral surface of the installation groove 321, the groove 410 can be arranged as a closed circular ring shape with the head and tail connected, or as a spiral shape with the head and tail separated. Correspondingly, the ferrule 420 is also arranged as a closed circular ring shape or a spiral shape and is embedded in the groove 410 to abut against the rotating shaft 210 from the outer peripheral surface of the rotating shaft 210. In this way, each damping structure 400 can be formed by installing only one ferrule 420, which greatly reduces the assembly work of the damping structure 400.

[0051] In this embodiment, by arranging the ferrule 420 in the circumferential direction of the rotating shaft 210, the damping structure 400 can buffer and absorb vibration of the rotor assembly 200 from the radial direction of the rotating shaft 210, and the ferrule 420 is made of an elastic material and can perform non-linear damping vibration reduction on the vibration of the rotating shaft 210 within the deformation range, so that the damping structure 400 has more stable damping performance and ensures that the motor can work well within a large speed range.

[0052] As Figure 1 and Figure 3 shown, in the embodiment of the present invention, a damping structure 400 installed in a motor of a washing device is introduced.

[0053] The damping structure 400 includes a groove 410, a ferrule 420, and a hollow rigid sleeve 430 sleeved in the installation groove 321.

[0054] Among them, the groove 410 can be opened on the inner peripheral surface of the rigid sleeve 430 for installing and fixing the ferrule 420.

[0055] In addition, the ferrule 420 is made of a material with elastic restoring force. At the same time, the width of the ferrule 420 in the radial direction is greater than the depth of the groove 410. In this way, when the ferrule 420 is embedded in the groove 410, it can protrude radially from the inner peripheral surface of the rigid sleeve 430 and abut against the outer peripheral surface of the rotating shaft 210.

[0056] In this way, when the rotating shaft 210 of the rotor assembly 200 passes through the vibration damping structure 400, the ferrule 420 can support the rotating shaft 210 from the outside and buffer the deviation force of the rotating shaft 210.

[0057] Furthermore, the groove 410 can extend circumferentially along the inner peripheral surface of the rigid sleeve 430 to form a ring shape; the groove 410 can also extend axially along the inner peripheral surface of the rigid sleeve 430 to form a strip shape.

[0058] When the groove 410 extends axially along the inner peripheral surface of the rigid sleeve 430, a plurality of grooves 410 can be formed in the circumferential direction of the inner peripheral surface of the rigid sleeve 430 and evenly distributed on the inner peripheral surface of the rigid sleeve 430. Correspondingly, the ferrule 420 is arranged to be strip-shaped and embedded in the groove 410. In this way, a plurality of ferrules 420 are discretely distributed on the inner peripheral surface of the rigid sleeve 430 and can abut against the rotating shaft 210 from the outer periphery of the rotating shaft 210.

[0059] Preferably, when the groove 410 extends circumferentially along the inner peripheral surface of the rigid sleeve 430, the groove 410 can be arranged as a closed circular ring with its head and tail connected, or as a spiral shape with its head and tail separated. Correspondingly, the ferrule 420 is also arranged as a closed circular ring or a spiral shape and is embedded in the groove 410 to abut against the rotating shaft 210 from the outer peripheral surface of the rotating shaft 210. In this way, each vibration damping structure 400 only needs to install one ferrule 420 to abut against the rotating shaft 210, greatly reducing the assembly work of the vibration damping structure 400.

[0060] In this embodiment, by arranging the ferrule 420 in the circumferential direction of the rotating shaft 210, the vibration damping structure 400 can buffer and absorb vibration from the radial direction of the rotating shaft 210, and the ferrule 420 is made of an elastic material and can perform non-linear damping vibration reduction on the vibration of the rotating shaft 210 within the deformation range, so that the vibration damping structure 400 has more stable vibration damping performance and ensures that the motor can work well within a large speed range.

[0061] As Figure 1 and Figure 2 shown, in the embodiments of the present invention, a vibration damping structure 400 with a rolling bearing 440 is introduced.

[0062] Specifically, the vibration damping structure 400 further includes a rolling bearing 440. The rolling bearing 440 is sleeved on the rotating shaft 210.

[0063] When the damping structure 400 does not include the rigid sleeve 430 and the groove 410 is formed on the inner peripheral surface of the mounting groove 321, the outer peripheral surface of the rolling bearing 440 is in clearance fit with the mounting groove 321. The ferrule 420 is embedded in the inner peripheral surface of the mounting groove 321 and abuts against the outer peripheral surface of the rolling bearing 440.

[0064] When the damping structure 400 includes the rigid sleeve 430 and the groove 410 is formed on the inner peripheral surface of the rigid sleeve 430, the outer peripheral surface of the rolling bearing 440 is in clearance fit with the inner peripheral surface of the rigid sleeve 430. In addition, the outer peripheral surface of the rigid sleeve 430 is in interference fit with the inner peripheral surface of the mounting groove 321, so that the rigid sleeve 430 is fixed on the end cover 320. The ferrule 420 is embedded in the inner peripheral surface of the rigid sleeve 430 and abuts against the outer peripheral surface of the rolling bearing 440.

[0065] Moreover, the rolling bearing 440 includes rollers, an inner bearing ring and an outer bearing ring. There is a gap between the inner bearing ring and the outer bearing ring, and the rollers are movably clamped in the gap between the inner bearing ring and the outer bearing ring. The relative rotation between the inner bearing ring and the bearing ring is achieved by the rotation of the rollers.

[0066] In this embodiment, the damping structure 400 can convert the sliding friction between the ferrule 420 and the rotating shaft 210 into rolling between the inner and outer bearing rings in the rolling bearing 440 through the rolling bearing 440, greatly reducing the wear of the ferrule 420 and extending the service life of the damping structure 400.

[0067] Furthermore, the gap between the outer peripheral surface of the rolling bearing 440 and the mounting groove 321 is filled with viscous grease 450. Or, the gap between the outer peripheral surface of the rolling bearing 440 and the rigid sleeve 430 is filled with viscous grease 450.

[0068] Specifically, the gap between the outer peripheral surface of the rolling bearing 440 and the inner peripheral surface of the mounting groove 321 is generally above 0.1 mm.

[0069] In this embodiment, filling viscous grease in the gap can adhere the outer bearing ring of the rolling bearing 440 to the inner peripheral surface of the mounting groove 321, increasing the friction between the outer bearing ring of the rolling bearing 440 and the inner peripheral surface of the mounting groove 321, and avoiding the rotation of the outer bearing ring of the rolling bearing 440 relative to the inner peripheral surface of the mounting groove 321 when the rotor 220 rotates at a high speed, thereby reducing the vibration noise of the rotating shaft 210.

[0070] As Figure 1 and Figure 4 shown, in the embodiment of the present invention, a damping structure 400 in a motor of a washing device is introduced.

[0071] To prevent the rotor assembly 200 from axially moving within the housing assembly 300, the vibration damping structure 400 further includes an elastic member 460 clamped between the bottom surface of the mounting groove 321 and the cross-section of the rolling bearing 440.

[0072] Specifically, the elastic member 460 is embedded in the mounting groove 321, and one end of the elastic member 460 abuts against the bottom surface of the mounting groove 321 and the other end abuts against the end face of the rolling bearing 440.

[0073] Furthermore, to reduce the workload of assembling the motor and simplify the assembly difficulty of the motor, the elastic member 460 is provided as an annular shape and sleeved on the rotating shaft 210.

[0074] In addition, the end face of the elastic member 460 can be set as a flat surface or a curved surface that undulates up and down in a wavy shape along the circumferential direction.

[0075] In this embodiment, by providing the elastic member 460 at one end of the rotor assembly 200, the elastic member 460 axially abuts against the rotating shaft 210 or the rolling bearing 440, applying an axial pre-tightening force to the rotor assembly 200, which can reduce and slow down the axial movement of the rotor assembly 200 and prevent the rotor assembly 200 from axially moving during high-speed rotation, causing strong vibration of the motor.

[0076] As Figure 1 and Figure 3 shown, in the embodiments of the present invention, a vibration damping structure 400 installed in a motor of a washing device is introduced.

[0077] The housing assembly 300 includes a hollow sleeve 310. End caps 320 are respectively provided at both ends of the sleeve 310 and the openings of the mounting grooves 321 face each other, and at least one end face of the vibration damping structure 400 abuts against the bottom surface of the mounting groove 321.

[0078] In this embodiment, by respectively providing a vibration damping structure 400 at both ends of the rotor assembly 200, the two ends of the rotor 220 can be jointly vibration-damped, improving the stability of the motor during high-speed rotation.

[0079] As Figure 1 and Figure 2 shown, in the embodiments of the present invention, a washing device motor capable of being quickly assembled is introduced.

[0080] A rotation prevention groove 110 is provided on the outer peripheral surface of the stator assembly 100.

[0081] The rotation prevention groove 110 axially extends through both ends of the stator assembly 100. A convex portion 311 extending along its axial direction is provided on the inner peripheral surface of the sleeve 310. When the stator assembly 100 is sleeved with the sleeve 310, the rotation prevention groove 110 and the convex portion 311 are engaged.

[0082] In this embodiment, by providing an anti-rotation groove 110 on the outer peripheral surface of the stator assembly 100, the stator assembly 100 can be quickly combined with the sleeve 310, simplifying the motor assembly process. Moreover, the anti-rotation groove 110 can fix the stator assembly 100 and the sleeve 310 together, preventing the stator assembly 100 from rotating when the rotor assembly 200 rotates at high speed.

[0083] As Figure 1 , Figure 2 , Figure 3 and Figure 4 shown, in an embodiment of the present invention, a damping structure 400 with better damping effect is introduced.

[0084] Specifically, an annular ring 420 is installed in the damping structure 400. Moreover, the cross-section perpendicular to the circumferential direction of the ring 420 is circular.

[0085] Preferably, the ring 420 is an O-ring seal.

[0086] In this embodiment, by setting the cross-section of the ring 420 to be circular, the damping force generated when the ring 420 is squeezed increases non-linearly, enabling the natural frequency of the damping structure 400 to be inconsistent with that of the rotor assembly 200, efficiently buffering the vibration caused by the remaining unbalance of the rotor assembly 200, and eliminating the excitation effect of the rotor assembly 200 on the vibration during rotation.

[0087] Embodiment Two

[0088] As Figure 1 shown, in an embodiment of the present invention, a rotor assembly 200 of a washing equipment motor is introduced.

[0089] The motor includes a housing assembly 300, a stator assembly 100, and a rotor assembly 200. The stator assembly 100 is fixed inside the housing assembly 300, and the rotor assembly 200 is rotatably embedded in the center of the stator assembly 100 and is rotatably connected to the end cover 320 in the housing assembly 300.

[0090] Specifically, the housing assembly 300 includes a hollow sleeve 310 and end covers 320 fixed at both ends of the sleeve 310. The stator assembly 100 includes a cylinder formed by stacking a plurality of silicon steel sheets and a conductive coil wound around the inner circumference of the cylinder. Moreover, an anti-rotation groove 110 that recesses radially toward the central axis of the cylinder is provided on the outer peripheral surface of the cylinder. The anti-rotation groove 110 extends along the axial direction of the cylinder.

[0091] Specifically, the rotor assembly 200 includes a rotating shaft 210 and a rotor 220 sleeved on the rotating shaft 210. The rotating shaft 210 is provided as a straight rod with the same cross-section along its axial direction. Retaining ring grooves 240 are respectively provided on the outer peripheral surfaces at both ends of the rotating shaft 210 and protrude from the rotor 220 in the axial direction.

[0092] In addition, an installation groove 321 is provided on one side surface of the end cover 320.

[0093] A through hole penetrating through both side surfaces of the end cover 320 is opened on the bottom surface of the installation groove 321. One end of the rotating shaft 210 of the rotor assembly 200 protrudes out of the end cover 320 as an output shaft, and the other end is embedded in the installation groove 321 of the end cover 320. Specifically, a speed measurement magnetic head 332 coaxial with the rotating shaft 210 is provided on the end surface of the other end of the rotating shaft 210. On the end cover 320, a speed measurement terminal 331 covering the speed measurement magnetic head 332 is provided on the side surface opposite to the side surface where the installation groove 321 is opened, for obtaining the real-time rotational speed of the rotor assembly 200.

[0094] Under normal circumstances, the motor is only provided with fixing holes on the end cover 320 at one end, and is installed and fixed in the washing equipment through fastening screws. As Figure 1 shown, two fixing holes are provided on the end cover 320. In order to buffer the vibration of the washing equipment caused by the high-speed rotation of the motor, the end covers 320 at both ends of the sleeve 310 align their respective fixing holes through the circumferential connection of fixing tubes 342.

[0095] Furthermore, a damping pad 341 is also embedded in the fixing holes of the end cover 320. Both ends of the fixing tube 342 are connected through the damping pad 341.

[0096] In this embodiment, by setting the rotating shaft 210 as a through-length straight rod with an unchanged cross-section, the mass ratio of the rotating shaft 210 to the mass of the rotor 220 is greatly reduced, so that the mass of the rotor assembly 200 is concentrated at the position of the rotor 220, which can effectively increase the moment of inertia of the rotor assembly 200 and reduce the remaining unbalance amount of the rotor assembly 200. Therefore, when the motor rotates at a high speed, the rotor assembly 200 is more likely to reach dynamic balance, reducing the probability of strong vibration of the rotor assembly 200 and increasing the service life of the motor.

[0097] As Figure 1 and Figure 2 shown, in the embodiment of the present invention, a rotor assembly 200 of a washing equipment motor is introduced.

[0098] The rotor assembly 200 further includes a positioning retaining ring 230 for restricting the axial movement of the rotating shaft 210. The positioning retaining ring 230 is sleeved on the retaining ring groove 240.

[0099] The snap ring groove 240 is provided as a snap ring groove 240 that is recessed from the outer peripheral surface of the rotating shaft 210 toward the center line of the rotating shaft 210. Among them, the snap ring grooves 240 can be discontinuously distributed in the circumferential direction of the rotating shaft 210, or can be a continuous annular shape that surrounds the circumferential direction of the rotating shaft 210.

[0100] Preferably, the snap ring grooves 240 are joined end to end in the circumferential direction of the rotating shaft 210 to form an annular shape. In this way, the mass of the rotating shaft 210 can be evenly distributed, so that the inertia axis of the rotating shaft 210 coincides with the actual central axis of the rotating shaft 210, reducing or eliminating the eccentric vibration caused by the rotation of the rotating shaft 210.

[0101] In this embodiment, by providing the snap ring groove 240 on the outer peripheral surface of the rotating shaft 210, the rotor assembly 200 can be installed with a snap ring to axially position the rotor assembly 200. At the same time, it can also reduce the mass ratio of the rotating shaft 210 in the rotor assembly 200, increase the mass ratio of the rotor 220, make the mass of the rotor assembly 200 concentrate at a position with a larger radius, increase the inertia of the rotor assembly 200, and make its dynamic balance more stable.

[0102] As Figure 1 and Figure 2 shown, in the embodiment of the present invention, a rotor assembly 200 of a washing equipment motor is introduced.

[0103] The outer peripheral surface of the rotating shaft 210 is further provided with fitting stripes 250. The fitting stripes 250 and the snap ring grooves 240 are alternately distributed in the axial direction of the rotating shaft 210. For example, snap ring grooves 240 are provided at both ends of the rotating shaft 210, and fitting stripes 250 are provided in the middle of the two snap ring grooves 240.

[0104] In addition, the rotor 220 is sleeved on the fitting stripes 250, and the snap ring grooves 240 are located outside the end faces at both ends of the rotor 220 in the axial direction.

[0105] It should be noted that the outer peripheral surface of the rotating shaft 210 at the fitting stripes 250 is provided with stripes that increase the surface roughness. The stripes can extend along the axial direction of the rotating shaft 210 or can extend along the spiral direction on the outer peripheral surface of the rotating shaft 210.

[0106] Specifically, the fitting stripes 250 are provided with concave and convex stripes that extend along the axial direction of the rotating shaft 210. A plurality of concave and convex stripes are evenly distributed in the circumferential direction of the rotating shaft 210, making the connection between the rotor 220 and the fitting stripes 250 stronger.

[0107] Preferably, when the stripes extend along the spiral direction on the outer peripheral surface of the rotating shaft 210, they can also extend from two opposite directions of clockwise and counterclockwise to form a fish-scale-like surface.

[0108] In this embodiment, the outer peripheral surface of the rotating shaft 210 is processed so that the rotating shaft 210 has a snap ring groove 240 and fitting stripes 250 along the axial direction, which improves the firmness of the connection between the rotor 220 and the rotating shaft 210, and also enables the rotor assembly 200 to be more conveniently assembled with the housing assembly 300 of the motor.

[0109] As Figure 1 shown, in the embodiment of the present invention, a rotor assembly 200 capable of increasing the ventilation volume is introduced.

[0110] An annular cooling part 221 is provided on the axial end face of the rotor 220. The distance between the inner peripheral surface of the cooling part 221 and the outer peripheral surface of the rotating shaft 210 is greater than the thickness of the cooling part 221 in the radial direction.

[0111] In addition, the cooling part 221 is made of a material with high heat conduction efficiency. For example, metal copper or aluminum is used to make the cooling part 221. In this way, the cooling part 221 can efficiently dissipate the heat of the rotor assembly 200 and prevent the temperature of the motor from being too high.

[0112] Specifically, a plurality of circular bosses are arranged at intervals along the circumferential direction on the outer end face of the cooling part 221. In this way, when the rotor assembly 200 rotates, the bosses can disturb the surrounding gas, causing the gas outside the motor housing to continuously flow into the motor housing and generating a circulating airflow.

[0113] In this embodiment, by providing the cooling part 221 on the rotor 220, the ventilation volume inside the motor and the heat dissipation efficiency of the rotor 220 are improved, preventing the local temperature of the rotor assembly 200 from being too high and ensuring that the rotor assembly 200 can operate at a high rotational speed for a long time.

[0114] The present invention also provides a manufacturing method for the above-mentioned rotor assembly 200. First, according to the formula: m per = M×G×60×10 3 / (π×d×n), calculate the remaining unbalance of the rotor 220. Then, set the rotating shaft 210 as a straight shaft with a constant cross-section along the axis direction. Finally, open the snap ring groove 240 on the rotating shaft 210 according to the remaining unbalance.

[0115] Where: m per represents the remaining unbalance, M represents the weight of the rotor 220, G represents the balance accuracy, d represents the diameter of the rotor 220, and n represents the maximum rated rotational speed of the rotor 220.

[0116] In this embodiment, by calculating the remaining unbalance of the rotor assembly 200, an accurate numerical basis is provided for setting the interval between the support points on the rotating shaft 210. By setting the interval between the two support points of the rotating shaft 210 in direct proportion to the remaining unbalance, the size of the interval distance can be accurately determined according to the remaining unbalance, thereby greatly reducing the destructiveness of the remaining unbalance of the rotor assembly 200 to dynamic balance.

[0117] In another embodiment of the present invention, a manufacturing method of the rotor assembly 200 is introduced.

[0118] The step of opening the retaining ring groove 240 according to the remaining unbalance includes: presetting a threshold value A. If the remaining unbalance is greater than the threshold value A, the distance between the retaining ring grooves 240 is set to be at least 1.5 times the axial length of the rotor 220.

[0119] If the remaining unbalance is less than or equal to the threshold value A, the distance between the retaining ring grooves 240 is set to be greater than the axial length of the rotor 220 and less than 1.5 times the axial length of the rotor 220.

[0120] Furthermore, the diameter ratio of the rotating shaft 210 to the rotor 220 is set to be directly proportional to the remaining unbalance.

[0121] The diameter of the rotating shaft 210 is determined according to the remaining unbalance and the diameter of the rotor 220.

[0122] In this embodiment, using the value of the remaining unbalance as the basis for the distance between the retaining ring grooves 240 opened on the rotating shaft 210 enables sequential correction of the rotor assembly 200 through the retaining ring grooves 240, improving the dynamic balance of the rotor assembly 200 after being assembled into the motor. Setting the diameter of the rotating shaft 210 based on the remaining unbalance can further reduce the mass ratio of the rotating shaft 210 in the rotor assembly 200 and improve the dynamic balance of the rotor assembly 200.

[0123] The present invention also provides a washing equipment motor having the above-mentioned rotor assembly 200.

[0124] The washing equipment motor includes a rotor assembly 200, a housing assembly 300, and a stator assembly 100 fixed within the housing assembly 300. The rotor assembly 200 has a rotating shaft 210, a rotor 220, and a positioning retaining ring 230, and is movably embedded in the center of the stator assembly 100.

[0125] Specifically, the housing assembly 300 includes a hollow sleeve 310 and end caps 320 fixed at both ends of the sleeve 310. The stator assembly 100 includes a cylinder formed by stacking a plurality of silicon steel sheets and a conductive coil wound around the inner circumference of the cylinder. Both ends of the rotating shaft 210 in the rotor assembly 200 are rotatably connected to the end caps 320 of the housing assembly 300.

[0126] Both ends of the rotating shaft 210 protrude from the rotor 220 respectively and are provided with snap ring grooves 240.

[0127] The positioning snap ring 230 is sleeved in the snap ring groove 240 and abuts against the end cover 320 to limit the axial movement of the rotor assembly 200 relative to the housing assembly 300.

[0128] In this embodiment, by providing the snap ring groove 240 and the positioning snap ring 230 on the rotating shaft 210, it is possible to prevent the rotor assembly 200 from axially moving in the motor during rotation, reduce the axial vibration intensity of the rotor assembly 200 when rotating in the motor, thereby greatly reducing the noise and power loss during the operation of the motor.

[0129] In an embodiment of the present invention, a washing equipment motor capable of reducing the vibration intensity of the rotor assembly 200 is introduced.

[0130] In order to reduce the vibration of the rotor assembly 200 in the vertical direction of the rotating shaft 210, an installation groove 321 is opened on the end cover 320, and a damping structure 400 is sleeved between the circumferential surface of the installation groove 321 and the outer peripheral surface of the rotating shaft 210.

[0131] Specifically, the end cover 320 is provided with an installation groove 321 that is recessed from the plane center of the end cover 320 towards the inside of the end cover 320. And, there is an annular gap between the inner circumferential surface of the installation groove 321 and the outer peripheral surface of the rotating shaft 210. In order to buffer and absorb the displacement and vibration of the rotating shaft 210 in its radial direction, a damping structure 400 is sleeved between the inner circumferential surface of the installation groove 321 and the outer peripheral surface of the rotating shaft 210.

[0132] In this embodiment, the damping structure 400 can buffer the radial offset of the rotating shaft 210, absorb the vibration energy of the rotor 220, play a damping role on the rotor 220, prevent the accumulation of vibration energy and the increase of vibration amplitude, thereby absorbing the vibration energy and preventing the rotor assembly 200 from hitting and rubbing against the housing assembly 300, and greatly reducing the noise and power loss of the motor during high-speed rotation.

[0133] The above description is only a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or decorations to equivalent changes within the scope of the technical solution of the present invention by using the technical content prompted above. However, as long as it does not depart from the content of the technical solution of the present invention, any simple modification, equivalent change and decoration made to the above embodiments based on the technical essence of the present invention still belong to the scope of the present invention.

Claims

1. A motor for a washing device, comprising a housing assembly (300) having an end cover (320) and a rotor assembly (200) disposed inside the housing and rotatably connected to the end cover (320), characterized in that the end cover (320) is provided with an installation groove (321), a rotating shaft (210) of the rotor assembly (200) is inserted into the installation groove (321), and a vibration damping structure (400) is sleeved between the installation groove (321) and the rotating shaft (210).

2. The motor for a washing device according to claim 1, characterized in that a groove (410) is formed on the inner peripheral surface of the installation groove (321), or a rigid sleeve (430) is sleeved in the installation groove (321), and a groove (410) is formed on the inner peripheral surface of the rigid sleeve (430); the vibration damping structure (400) includes a ferrule (420), and the ferrule (420) is embedded in the groove (410) and abuts against the rotating shaft (210).

3. The motor for a washing device according to claim 2, characterized in that the groove (410) extends circumferentially along the inner peripheral surface of the installation groove (321) or the rigid sleeve (430) to form a closed ring shape, and the ferrule (420) is correspondingly set as a ring shape; or, the groove (410) extends axially along the inner peripheral surface of the installation groove (321) or the rigid sleeve (430), and the ferrule (420) is correspondingly set as a strip shape.

4. The motor of a washing device according to claim 3, characterized in that, A cross-section of the groove (410) perpendicular to the extension direction is rectangular, a cross-section of the ferrule (420) perpendicular to the length direction is circular, and the circular diameter of the ferrule (420) is larger than the rectangular width of the groove (410); the ferrule (420) protrudes from its inner peripheral surface along the diameter direction of the installation groove (321), or protrudes from its inner peripheral surface along the diameter direction of the rigid sleeve (430).

5. A motor of a washing device according to any one of claims 1-4, characterized in that, A rolling bearing (440) is sleeved on the rotating shaft (210), and there is a gap between the outer peripheral surface of the rolling bearing (440) and the inner peripheral surface of the vibration damping structure (400).

6. The motor of a washing device according to claim 5, characterized in that, The gap between the outer peripheral surface of the rolling bearing (440) and the installation groove (321) or the rigid sleeve (430) is filled with viscous grease (450).

7. The motor of a washing device according to claim 6, characterized in that, An elastic member (460) is embedded between the bottom surface of the installation groove (321) and the end surface of the rolling bearing (440).

8. The motor of a washing device according to claim 7, characterized in that, The elastic member (460) is set as an annular shape and sleeved on the rotating shaft (210), and the end surface of the elastic member (460) is a curved surface and undulates up and down in a wave shape along the circumference of the end surface.

9. A motor of a washing device according to any one of claims 1-4, characterized in that The housing assembly (300) includes a hollow sleeve (310), end covers (320) are respectively provided at both ends of the sleeve (310), and the end surface of the end cover (320) provided with the installation groove (321) is connected to the sleeve (310); a stator assembly (100) is embedded in the hollow hole of the sleeve (310), the rotor assembly (200) passes through the center of the stator assembly (100), and the gap between the two is larger than the radial displacement of the rotating shaft in the vibration damping structure (400).

10. The motor of a washing device according to claim 9, characterized in that, The outer peripheral surface of the stator assembly (100) is provided with an anti-rotation groove (110) that axially extends through both ends of the stator assembly (100). The inner peripheral surface of the sleeve (310) is provided with a convex portion (311) that axially extends along it. When the stator assembly (100) is sleeved with the sleeve (310), the anti-rotation groove (110) is engaged with the convex portion (311).

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