Rotor assembly of washing equipment motor and washing equipment motor

Abstract

The invention discloses a rotor assembly of a washing equipment motor and the washing equipment motor, and the rotor assembly comprises a straight rod rotating shaft which is a straight rod with the same cross section along the axis direction of the straight rod rotating shaft; the rotor is fixedly arranged on the peripheral face of the straight rod rotating shaft in a sleeving mode. According to the invention, the rotating shaft is set to be the full-length straight rod with the constant cross section, so that the ratio of the mass of the rotating shaft to the mass of the rotor is greatly reduced, the mass of the rotor assembly is concentrated at the position of the rotor, the rotational inertia of the rotor assembly can be effectively increased, and the residual unbalance amount of the rotor assembly is reduced; the rotor assembly can reach dynamic balance more easily, the probability of strong vibration of the rotor assembly is reduced, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of washing equipment, and in particular relates to a rotor assembly of a washing equipment motor and a washing equipment motor. Background Art

[0002] In the prior art, the motor generally comprises two parts, a rotor and a stator, wherein the rotor is rotatably connected to the housing of the motor through bearings sleeved on both ends of its straight shaft.

[0003] In existing rotors, the straight shaft is generally arranged in a stepped structure. The diameter of the part where the straight shaft is connected to the rotor is the largest, and the diameter of the two ends of the straight shaft protruding from the rotor along the axial direction is reduced, so that the connected sections of different diameters on the straight shaft form a step surface. The end face of the bearing is generally abutted against the step surface of the straight shaft for assembly and positioning.

[0004] For example, the Chinese invention patent with application number 201010151449.X discloses an improved structure of a straight shaft of a motor rotor, including a straight shaft and a rotor mounted on the straight shaft, wherein the straight shaft is provided with a shoulder structure on the outer side of the bearing installation. Since the straight shaft of the motor rotor is provided with a shoulder structure on the outer side of the bearing installation, the shoulder will be positioned and stressed after the final assembly, thereby protecting the bearing.

[0005] However, such a straight-rod shaft structure will cause the mass of the rotor assembly to concentrate toward the center line of the straight-rod shaft, reducing the rotational inertia of the rotor assembly and increasing the residual imbalance of the rotor, making it difficult for the rotor assembly to achieve dynamic balance at a higher speed. As a result, when the motor is operating at a high speed, the rotor assembly will vibrate violently, exacerbating the wear of the motor.

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

[0007] The object of the present invention is to provide a rotor assembly for a washing machine motor, so as to reduce the mass ratio of the straight shaft in the rotor assembly, concentrate the mass on the rotor, and optimize and increase the moment of inertia of the rotor assembly.

[0008] Another object of the present invention is to provide a washing equipment motor using the above-mentioned rotor assembly to achieve the purpose of reducing the vibration intensity of the motor under high-speed rotation conditions, reducing noise and power loss.

[0009] In order to solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0010] A rotor assembly of a washing equipment motor comprises: a straight rod rotating shaft, which is a straight rod with the same cross section along its axial direction; and a rotor, which is fixedly sleeved on the outer peripheral surface of the straight rod rotating shaft.

[0011] Further, both ends of the straight rod rotating shaft protrude axially from the rotor and are provided with snap ring grooves that are recessed radially from the outer peripheral surface of the straight rod rotating shaft toward the central axis;

[0012] The snap ring grooves extend circumferentially along the straight rod rotating shaft and are embedded with positioning snap rings that protrude radially from the outer peripheral surface of the straight rod rotating shaft.

[0013] Further, the spacing of the snap ring grooves on the straight rod rotating shaft is greater than the axial length of the rotor, less than 1.5 times the axial length of the rotor, and is positively correlated with the remaining unbalance of the rotor assembly.

[0014] Further, the straight rod rotating shaft is provided with a stripe structure that extends along its outer peripheral surface and is located between the two snap ring grooves, and the rotor is sleeved on the stripe structure and is in interference fit with the straight rod rotating shaft.

[0015] Further, the stripe structure extends axially along the straight rod rotating shaft and is evenly and spaced circumferentially on the straight rod rotating shaft.

[0016] Further, the stripe structure is formed by a plurality of textures alternately extending in a spiral shape in the clockwise and counterclockwise directions along the circumference of the straight rod rotating shaft to form a fish scale shape.

[0017] Further, the rotor is provided with an annular cooling part that protrudes in a direction perpendicular to its end face, and the radial distance between the cooling part and the straight rod rotating shaft is greater than the radial thickness of the cooling part.

[0018] The present invention also provides a washing equipment motor having the above rotor assembly. The washing equipment motor includes a housing assembly and a stator assembly fixed within the housing assembly, and the rotor assembly is movably embedded in the stator assembly and is rotatably connected to the end cover of the housing assembly;

[0019] Both ends of the straight rod rotating shaft protrude from the rotor and are in contact with the end cover respectively to limit the axial movement of the rotor assembly relative to the housing assembly.

[0020] Further, the straight rod rotating shaft is provided with a snap ring groove that is recessed radially from the outer peripheral surface of the straight rod rotating shaft toward the central axis;

[0021] A positioning snap ring that protrudes radially from the outer peripheral surface of the straight rod rotating shaft is embedded on the snap ring groove, and the positioning snap ring is in contact with the end cover.

[0022] Further, the end cover is provided with a mounting groove, and a damping structure is sleeved between the inner peripheral surface of the mounting groove and the outer peripheral surface of the straight rod rotating shaft.

[0023] The present invention further provides a washing equipment motor having the above rotor assembly, including a housing assembly and a stator assembly fixed within the housing assembly, and further including a rotor assembly having a straight rod rotating shaft, a rotor, and a positioning retaining ring, which is movably embedded in the center of the stator assembly and rotatably connected to the end cover of the housing assembly;

[0024] Both ends of the straight rod rotating shaft protrude from the rotor and are provided with first connection portions, and the positioning retaining ring is sleeved on the first connection portions and abuts against the end cover to limit the axial movement of the rotor assembly relative to the housing assembly.

[0025] Further, an installation groove is provided on the end cover, and a vibration damping structure is sleeved between the circumferential surface of the installation groove and the outer circumferential surface of the straight rod rotating shaft.

[0026] After adopting the above technical solutions, the present invention has the following beneficial effects compared with the prior art.

[0027] 1. By setting the straight rod rotating shaft as a through-length straight rod with a constant cross-section, the mass ratio of the straight rod rotating shaft to the rotor is greatly reduced, so that the mass of the rotor assembly is concentrated at the position of the rotor, which can effectively increase the moment of inertia of the rotor assembly and reduce the remaining unbalance of the rotor assembly. Therefore, when the motor rotates at a high speed, the rotor assembly is easier to reach dynamic balance, reducing the probability of strong vibration of the rotor assembly and increasing the service life of the motor.

[0028] 2. By providing a retaining ring groove on the outer circumferential surface of the straight rod rotating shaft, the rotor assembly can be installed with a retaining ring to axially position the rotor assembly. At the same time, the mass ratio of the straight rod rotating shaft in the rotor assembly can be reduced, and the mass ratio of the rotor can be increased, so that the mass of the rotor assembly is concentrated at a position with a larger radius, improving the inertia of the rotor assembly and making its dynamic balance more stable.

[0029] 3. By calculating the remaining unbalance of the rotor assembly, an accurate numerical basis is provided for setting the interval of the support points on the straight rod rotating shaft. The interval between the two support points of the straight rod rotating shaft is set in direct proportion to the remaining unbalance, and the size of the interval distance can be accurately determined according to the remaining unbalance, thereby greatly reducing the destructive effect of the remaining unbalance of the rotor assembly on dynamic balance.

[0030] The following further describes in detail the specific embodiments of the present invention with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] 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 obtain other drawings based on these drawings without creative efforts. In the accompanying drawings:

[0032] Figure 1 is a schematic structural diagram of a motor for a washing device in the present invention;

[0033] Figure 2 is a schematic cross-sectional view of a motor for a washing device in the present invention;

[0034] Figure 3 is Figure 2 a schematic diagram of the partial structure A of the motor of the washing device in;

[0035] Figure 4 is Figure 2 a schematic diagram of the partial structure B of the motor of the washing device in.

[0036] Wherein: 100, stator assembly; 110, anti-rotation groove; 200, rotor assembly; 210, straight rod rotating shaft; 220, rotor; 221, cooling part; 230, positioning retaining ring; 240, retaining ring groove; 250, stripe structure; 300, housing assembly; 310, sleeve; 311, convex part; 320, end cover; 321, mounting groove; 331, speed measurement terminal; 332, speed measurement magnetic head; 341, vibration damping pad; 342, fixing pipe; 400, vibration damping structure; 410, groove; 420, ferrule; 430, rigid sleeve; 440, rolling bearing; 450, viscous grease; 460, elastic part.

[0037] It should be noted that these drawings and text 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 referring to specific embodiments. Detailed Embodiments

[0038] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention 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.

[0039] 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 of the present invention.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "installation", "connection", "coupling", "contact", and "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 a direct connection or an indirect connection 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 circumstances.

[0041] Embodiment 1

[0042] As Figure 1 shown, in an embodiment of the present invention, a rotor assembly 200 of a washing equipment motor is introduced.

[0043] The washing equipment 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 an end cover 320 in the housing assembly 300.

[0044] 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, a rotation stopping groove 110 recessed radially towards the central axis of the cylinder is provided on the outer circumferential surface of the cylinder. The rotation stopping groove 110 extends along the axial direction of the cylinder.

[0045] Particularly, the rotor assembly 200 includes a straight rod rotating shaft 210 and a rotor 220 sleeved on the straight rod rotating shaft 210. The straight rod rotating shaft 210 is provided as a straight rod with the same cross-section along its axial direction, and retaining ring grooves 240 are respectively provided on the outer circumferential surfaces at both ends of the straight rod rotating shaft 210 and protrude from the rotor 220 in the axial direction.

[0046] In addition, an installation groove 321 is provided on one side surface of the end cover 320.

[0047] A through hole penetrating both side surfaces of the end cover 320 is opened on the bottom surface of the installation groove 321. One end of the straight rod 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. Particularly, a speed measurement magnetic head 332 coaxial with the straight rod rotating shaft 210 is provided on the end surface of the other end of the straight rod 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 rotation speed of the rotor assembly 200.

[0048] Normally, the motor is only provided with fixing holes on one end cover 320 and is installed and fixed in the washing equipment through fastening screws. AsFigure 1 As shown in the figure, 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 fixing pipes 342 in the circumferential direction.

[0049] Furthermore, a vibration damping pad 341 is also embedded in the fixing hole of the end cover 320. Both ends of the fixing pipe 342 are inserted into the vibration damping pad 341.

[0050] In this embodiment, by setting the straight rod rotating shaft 210 as a through-length straight rod with a constant cross-section, the mass ratio of the straight rod 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 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.

[0051] As Figure 1 and Figure 2 shown, in an embodiment of the present invention, a rotor assembly 200 of a washing equipment motor is introduced.

[0052] The rotor assembly 200 further includes a positioning retaining ring 230 for restricting the axial movement of the straight rod rotating shaft 210. The positioning retaining ring 230 is sleeved on the retaining ring groove 240.

[0053] The retaining ring groove 240 is set as a retaining ring groove 240 that depresses from the outer circumference of the straight rod rotating shaft 210 towards the center line of the straight rod rotating shaft 210. Among them, the retaining ring grooves 240 can be discontinuously distributed in the circumferential direction of the straight rod rotating shaft 210, or can be a continuous ring surrounding the circumferential direction of the straight rod rotating shaft 210.

[0054] Preferably, the retaining ring grooves 240 are connected end to end in the circumferential direction of the straight rod rotating shaft 210 to form a ring. In this way, the mass of the straight rod rotating shaft 210 can be evenly distributed, so that the inertia axis of the straight rod rotating shaft 210 coincides with the actual central axis of the straight rod rotating shaft 210, reducing or eliminating the eccentric vibration caused by the rotation of the straight rod rotating shaft 210.

[0055] The distance between the retaining ring grooves 240 on the straight rod rotating shaft 210 is greater than the axial length of the rotor 220 and less than 1.5 times the axial length of the rotor 220, and is positively correlated with the remaining unbalance of the rotor assembly 200.

[0056] In this embodiment, by providing a retaining ring groove 240 on the outer peripheral surface of the straight rod rotating shaft 210, the rotor assembly 200 can be installed with a retaining ring to axially position the rotor assembly 200. At the same time, the mass ratio of the straight rod rotating shaft 210 in the rotor assembly 200 can be reduced, and the mass ratio of the rotor 220 can be increased, so that the mass of the rotor assembly 200 is concentrated at a position with a larger radius, the inertia of the rotor assembly 200 is increased, and its dynamic balance is more stable.

[0057] 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.

[0058] A stripe structure 250 is further provided on the outer peripheral surface of the straight rod rotating shaft 210. The stripe structure 250 extends along the axial direction of the straight rod rotating shaft 210 and is evenly and spacedly distributed in the circumferential direction of the straight rod rotating shaft 210.

[0059] The stripe structure 250 and the retaining ring groove 240 are alternately distributed in the axial direction of the straight rod rotating shaft 210. For example, retaining ring grooves 240 are provided at both ends of the straight rod rotating shaft 210, and the stripe structure 250 is provided in the middle between the two retaining ring grooves 240.

[0060] In addition, the rotor 220 is sleeved on the stripe structure 250, and the retaining ring groove 240 is located outside the end faces at both ends of the rotor 220 in the axial direction.

[0061] It should be noted that the straight rod rotating shaft 210 is provided with stripes on the outer peripheral surface of the stripe structure 250 to increase the surface roughness. The stripes can extend along the axial direction of the straight rod rotating shaft 210 or extend along the spiral direction on the outer peripheral surface of the straight rod rotating shaft 210.

[0062] Specifically, the stripe structure 250 is provided with concave and convex stripes extending along the axial direction of the straight rod rotating shaft 210. A plurality of concave and convex stripes are evenly distributed in the circumferential direction of the straight rod rotating shaft 210, so that the connection between the rotor 220 and the stripe structure 250 is more firm.

[0063] Preferably, the stripe structure 250 is formed by a plurality of textures alternately extending in a spiral shape in the clockwise and counterclockwise directions along the circumferential direction of the straight rod rotating shaft 210 to form a fish scale shape.

[0064] That is, when the stripes extend along the spiral direction on the outer peripheral surface of the straight rod rotating shaft 210, they extend from two opposite directions of clockwise and counterclockwise to form a fish scale-shaped surface.

[0065] In this embodiment, the outer peripheral surface of the straight rod rotating shaft 210 is processed so that the straight rod rotating shaft 210 has a snap ring groove 240 and a stripe structure 250 along the axial direction, which improves the firmness of the connection between the rotor 220 and the straight rod rotating shaft 210, and also enables the rotor assembly 200 to be more conveniently assembled with the housing assembly 300 of the motor.

[0066] As Figure 1 shown, in the embodiment of the present invention, a rotor assembly 200 capable of increasing the ventilation volume is introduced.

[0067] An annular cooling portion 221 is provided on the axial end face of the rotor 220.

[0068] The cooling portion 221 protrudes in a ring shape from the outer peripheral edge of the rotor end face along the vertical direction of its end face. Moreover, the distance between the inner peripheral surface of the cooling portion 221 and the outer peripheral surface of the straight rod rotating shaft 210 is greater than the thickness of the cooling portion 221 in the radial direction.

[0069] In addition, the cooling portion 221 is made of a material with high heat conduction efficiency. For example, metal copper or aluminum is used to make the cooling portion 221. In this way, the cooling portion 221 can efficiently dissipate the heat of the rotor assembly 200 and prevent the temperature of the motor from being too high.

[0070] Specifically, a plurality of circular bosses are arranged at intervals along the circumferential direction on the outer side end face of the cooling portion 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, generating a circulating airflow.

[0071] In this embodiment, by providing the cooling portion 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.

[0072] The present invention also provides a manufacturing method for the above 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 straight rod 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 straight rod rotating shaft 210 according to the remaining unbalance.

[0073] 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.

[0074] 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 straight rod rotating shaft 210. By setting the interval between the two support points of the straight rod rotating shaft 210 to be proportional to the remaining unbalance, the size of the interval distance can be accurately determined according to the remaining unbalance, thereby greatly reducing the destructive effect of the remaining unbalance of the rotor assembly 200 on dynamic balance.

[0075] In another embodiment of the present invention, a manufacturing method of the rotor assembly 200 is introduced.

[0076] 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.

[0077] 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.

[0078] Furthermore, the diameter ratio of the straight rod rotating shaft 210 to the rotor 220 is set to be proportional to the remaining unbalance.

[0079] The diameter of the straight rod rotating shaft 210 is determined according to the remaining unbalance and the diameter of the rotor 220.

[0080] In this embodiment, using the value of the remaining unbalance as the basis for setting the distance between the retaining ring grooves 240 on the straight rod rotating shaft 210 enables the rotor assembly 200 to be sequentially corrected 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 straight rod rotating shaft 210 based on the remaining unbalance can further reduce the mass ratio of the straight rod rotating shaft 210 in the rotor assembly 200 and improve the dynamic balance of the rotor assembly 200.

[0081] The present invention also provides a washing equipment motor having the above-mentioned rotor assembly 200.

[0082] 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 straight rod rotating shaft 210, a rotor 220, and a positioning retaining ring 230, and is movably embedded in the center of the stator assembly 100.

[0083] 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. Both ends of the straight rod rotating shaft 210 in the rotor assembly 200 are rotatably connected to the end caps 320 of the housing assembly 300.

[0084] Both ends of the straight rod rotating shaft 210 protrude from the rotor 220 respectively and are provided with snap ring grooves 240.

[0085] The positioning snap ring 230 is sleeved in the snap ring groove 240 and abuts against the end cap 320 to limit the axial movement of the rotor assembly 200 relative to the housing assembly 300.

[0086] In this embodiment, by providing the snap ring groove 240 and the positioning snap ring 230 on the straight rod 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.

[0087] In an embodiment of the present invention, a washing equipment motor capable of reducing the vibration intensity of the rotor assembly 200 is introduced.

[0088] In order to reduce the vibration of the rotor assembly 200 in the vertical direction of the straight rod rotating shaft 210, an installation groove 321 is formed on the end cap 320, and a damping structure 400 is sleeved between the circumferential surface of the installation groove 321 and the outer circumferential surface of the straight rod rotating shaft 210.

[0089] Specifically, the end cap 320 is provided with an installation groove 321 that is recessed from the plane center of the end cap 320 towards the inside of the end cap 320. Moreover, there is an annular gap between the inner circumferential surface of the installation groove 321 and the outer circumferential surface of the straight rod rotating shaft 210. In order to buffer and absorb the displacement and vibration of the straight rod 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 circumferential surface of the straight rod rotating shaft 210.

[0090] In this embodiment, the damping structure 400 can buffer the radial offset of the straight rod 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.

[0091] Embodiment Two

[0092] As Figure 1 shown, in an embodiment of the present invention, a washing equipment motor is introduced.

[0093] 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. 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.

[0094] 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 number of silicon steel sheets and a conductive coil wound around the inner circumference of the cylinder. Moreover, a rotation stopping groove 110 that recesses radially toward the central axis of the cylinder is provided on the outer circumferential surface of the cylinder. The rotation stopping groove 110 extends along the axial direction of the cylinder.

[0095] In addition, an installation groove 321 that recesses from the center of the plane 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 circumferential surface of the installation groove 321 and the outer circumferential surface of the straight rod rotating shaft 210. In order to buffer and absorb the displacement and vibration of the straight rod rotating shaft 210 in its radial direction, a vibration damping structure 400 is sleeved between the inner circumferential surface of the installation groove 321 and the outer circumferential surface of the straight rod rotating shaft 210.

[0096] In this embodiment, an installation groove 321 is opened on the end cap 320, and a vibration damping structure 400 surrounding the straight rod rotating shaft 210 is provided between the inner circumferential surface of the installation groove 321 and the outer circumferential surface of the straight rod rotating shaft 210. When the rotor assembly 200 rotates at a high speed, the vibration damping structure 400 can buffer the radial offset of the straight rod 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 to prevent 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.

[0097] 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.

[0098] The vibration damping structure 400 includes a groove 410 and a collar 420. Among them, the groove 410 can be opened on the inner circumferential surface of the installation groove 321 for installing and fixing the collar 420.

[0099] 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, when the collar 420 is embedded in the groove 410, it can protrude radially from the inner circumferential surface of the installation groove 321 and abut against the outer circumferential surface of the straight rod rotating shaft 210.

[0100] In this way, when the straight rod rotating shaft 210 of the rotor assembly 200 is inserted through the vibration damping structure 400, the ferrule 420 can support the straight rod rotating shaft 210 from the outer periphery and buffer the deviation force of the straight rod rotating shaft 210.

[0101] 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.

[0102] 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 straight rod rotating shaft 210 from the outer periphery of the straight rod rotating shaft 210.

[0103] 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 straight rod rotating shaft 210 from the outer peripheral surface of the straight rod rotating shaft 210. In this way, each vibration damping structure 400 can be formed by installing only one ferrule 420, greatly reducing the assembly work of the vibration damping structure 400.

[0104] In this embodiment, by arranging the ferrule 420 in the circumferential direction of the straight rod rotating shaft 210, the vibration damping structure 400 can buffer and absorb vibration of the rotor assembly 200 from the radial direction of the straight rod 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 straight rod 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.

[0105] As Figure 1 and Figure 3 shown, in the embodiment of the present invention, a vibration damping structure 400 installed in a motor of a washing device is introduced.

[0106] The vibration damping structure 400 includes a groove 410, a ferrule 420, and a hollow rigid sleeve 430 sleeved in the installation groove 321.

[0107] 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.

[0108] 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 straight rod rotating shaft 210.

[0109] In this way, when the straight rod rotating shaft 210 of the rotor assembly 200 passes through the damping structure 400, the ferrule 420 can support the straight rod rotating shaft 210 from the outside and buffer the deviation force of the straight rod rotating shaft 210.

[0110] 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.

[0111] 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 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 rigid sleeve 430 and can abut against the straight rod rotating shaft 210 from the outside of the straight rod rotating shaft 210.

[0112] 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 straight rod rotating shaft 210 from the outer peripheral surface of the straight rod rotating shaft 210. In this way, each damping structure 400 only needs to install one ferrule 420 to abut against the straight rod rotating shaft 210, greatly reducing the assembly work of the damping structure 400.

[0113] In this embodiment, by arranging the ferrule 420 in the circumferential direction of the straight rod rotating shaft 210, the damping structure 400 can buffer and absorb vibration of the rotor assembly 200 from the radial direction of the straight rod rotating shaft 210, and the ferrule 420 is made of an elastic material and can perform non-linear damping and vibration reduction on the vibration of the straight rod 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.

[0114] As Figure 1 and Figure 2 shown, in the embodiment of the present invention, a damping structure 400 with a rolling bearing 440 is introduced.

[0115] Specifically, the damping structure 400 further includes a rolling bearing 440. The rolling bearing 440 is sleeved on the straight rod rotating shaft 210.

[0116] When the damping structure 400 does not include the rigid sleeve 430 and the groove 410 is opened on the inner peripheral surface of the installation groove 321, the outer peripheral surface of the rolling bearing 440 is in clearance fit with the installation groove 321. The ferrule 420 is embedded in the inner peripheral surface of the installation groove 321 and abuts against the outer peripheral surface of the rolling bearing 440.

[0117] When the damping structure 400 includes the rigid sleeve 430 and the groove 410 is opened 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 installation 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.

[0118] 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.

[0119] In this embodiment, the damping structure 400 can convert the sliding friction between the ferrule 420 and the straight rod 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.

[0120] Furthermore, the gap between the outer peripheral surface of the rolling bearing 440 and the installation groove 321 is filled with viscous grease 450. Alternatively, the gap between the outer peripheral surface of the rolling bearing 440 and the rigid sleeve 430 is filled with viscous grease 450.

[0121] Specifically, the gap between the outer peripheral surface of the rolling bearing 440 and the inner peripheral surface of the installation groove 321 is generally above 0.1 mm.

[0122] 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 installation groove 321, increasing the friction between the outer bearing ring of the rolling bearing 440 and the inner peripheral surface of the installation groove 321, and avoiding the rotation of the outer bearing ring of the rolling bearing 440 relative to the inner peripheral surface of the installation groove 321 when the rotor 220 rotates at a high speed, thereby reducing the vibration noise of the straight rod rotating shaft 210.

[0123] Such as Figure 1 and Figure 4As shown in the figure, in an embodiment of the present invention, a vibration damping structure 400 in a motor of a washing device is introduced.

[0124] In order to prevent the rotor assembly 200 from axially moving in the housing assembly 300, the vibration damping structure 400 further includes an elastic member 460 clamped between the bottom surface of the installation groove 321 and the cross section of the rolling bearing 440.

[0125] Specifically, the elastic member 460 is embedded in the installation groove 321, and one end of the elastic member 460 abuts against the bottom surface of the installation groove 321, and the other end abuts against the end surface of the rolling bearing 440.

[0126] Furthermore, in order 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 straight rod rotating shaft 210.

[0127] In addition, the end surface 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.

[0128] 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 straight rod 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.

[0129] As Figure 1 and Figure 3 shown, in an embodiment of the present invention, a vibration damping structure 400 installed in a motor of a washing device is introduced.

[0130] 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 installation grooves 321 face each other, and at least one end surface of the vibration damping structure 400 abuts against the bottom surface of the installation groove 321.

[0131] In this embodiment, a vibration damping structure 400 is respectively provided at both ends of the rotor assembly 200, which can jointly damp the vibration at both ends of the rotor 220 and improve the stability of the high-speed rotation of the motor.

[0132] As Figure 1 and Figure 2 shown, in an embodiment of the present invention, a motor of a washing device that can be quickly assembled is introduced.

[0133] A rotation prevention groove 110 is provided on the outer peripheral surface of the stator assembly 100.

[0134] The anti-rotation groove 110 extends axially through both ends of the stator assembly 100. The inner peripheral surface of the sleeve 310 is provided with a convex portion 311 extending along its axial direction. When the stator assembly 100 is sleeved with the sleeve 310, the anti-rotation groove 110 is engaged with the convex portion 311.

[0135] In this embodiment, by providing the 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 assembly process of the motor. 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 a high speed.

[0136] Such as Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, in the embodiments of the present invention, a vibration damping structure 400 with better damping effect is introduced.

[0137] Specifically, an annular ring 420 is installed in the vibration damping structure 400. And, the cross-section perpendicular to the circumferential direction of the ring 420 is circular.

[0138] Preferably, the ring 420 is set as an O-ring.

[0139] In this embodiment, setting the cross-section of the ring 420 as circular makes the damping force generated when the ring 420 is squeezed increase non-linearly, enabling the natural frequency of the vibration 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 rotation of the rotor assembly 200 on the vibration.

[0140] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications to the above-mentioned disclosed technical content within the scope of the technical solution of the present invention to make equivalent embodiments of equivalent changes. However, as long as it does not depart from the technical content of the technical solution of the present invention, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A rotor assembly of a washing equipment motor, characterized in that, Comprising: A straight rod rotating shaft (210), which is a straight rod with the same cross-section along its axial direction; A rotor (220), fixedly sleeved on the outer peripheral surface of the straight rod rotating shaft (210).

2. The rotor assembly of a washing equipment motor according to claim 1, wherein Both ends of the straight rod rotating shaft (210) protrude axially from the rotor (220) and are provided with a retaining ring groove (241) that is recessed radially from the outer peripheral surface of the straight rod rotating shaft (210) towards the central axis; The retaining ring groove (241) extends circumferentially along the straight rod rotating shaft (210) and is embedded with a positioning retaining ring (230) that protrudes radially from the outer peripheral surface of the straight rod rotating shaft (210).

3. The rotor assembly of a washing device motor according to claim 2, characterized in that, The spacing of the retaining ring groove (241) on the straight rod rotating shaft (210) is greater than the axial length of the rotor (220), less than 1.5 times the axial length of the rotor (220), and is positively correlated with the remaining unbalance of the rotor assembly.

4. A rotor assembly of a washing device motor according to any one of claims 1-3, characterized in that, The straight rod rotating shaft (210) is provided with a stripe structure (250) extending along its outer peripheral surface, located between the two retaining ring grooves (241), and the rotor (220) is sleeved on the stripe structure (250) and is in interference connection with the straight rod rotating shaft (210).

5. The rotor assembly of a washing device motor according to claim 4, characterized in that The stripe structure (250) extends axially along the straight rod rotating shaft (210) and is evenly and spacedly distributed in the circumferential direction of the straight rod rotating shaft (210).

6. The rotor assembly of a washing device motor according to claim 5, characterized in that, The stripe structure (250) is formed by a number of textures alternating in the circumferential direction of the straight rod rotating shaft (210) in a clockwise and counterclockwise direction and extending in a spiral shape to form a fish scale shape.

7. A rotor assembly of a washing device motor according to any one of claims 1-3, characterized in that, The rotor (220) is provided with an annular cooling portion (221) protruding in the vertical direction of its end face, and the radial spacing between the cooling portion (221) and the straight rod rotating shaft (210) is greater than the radial thickness of the cooling portion (221).

8. A washing equipment motor adopting the rotor assembly according to any one of claims 1-7, comprising a housing assembly (300) and a stator assembly (100) fixed in the housing assembly (300), wherein The rotor assembly (200) is movably embedded in the stator assembly (100) and is rotatably connected to the end cover (320) of the housing assembly (300); Both ends of the straight rod rotating shaft (210) protrude from the rotor (220) respectively and are in contact with the end cover (320) to limit the axial movement of the rotor assembly relative to the housing assembly (300).

9. The motor of a washing device according to claim 8, characterized in that, The straight rod rotating shaft (210) is provided with a retaining ring groove (241) that is recessed radially from the outer peripheral surface of the straight rod rotating shaft (210) towards the central axis; The retaining ring groove (241) is embedded with a positioning retaining ring (230) that protrudes radially from the outer peripheral surface of the straight rod rotating shaft (210), and the positioning retaining ring (230) is in contact with the end cover (320).

10. A washing equipment motor according to claim 9, characterized in that, The end cover (320) is provided with a mounting groove (321), and a damping structure (400) is sleeved between the inner peripheral surface of the mounting groove (321) and the outer peripheral surface of the straight rod rotating shaft (210).

Images