Motor and laundry treatment device

Abstract

The application provides a motor and a clothes processing device, wherein the motor comprises a stator assembly, the stator assembly comprises a first mounting hole; a rotor assembly is rotatably arranged in the first mounting hole; a rotating shaft is arranged in the rotor assembly, and the rotating shaft rotates along with the rotor assembly; an end cover is arranged at one end of the stator assembly, the rotating shaft penetrates through the end cover, the rotating shaft is rotatable relative to the end cover, the end cover comprises a first mounting part, the first mounting part protrudes from the stator assembly along the circumferential side of the stator assembly, and the first mounting part is used for mounting and fixing the motor; and a bearing assembly is arranged to connect the rotating shaft and the end cover, wherein the end cover comprises a main body, the main body comprises a second mounting hole, the rotating shaft penetrates through the second mounting hole; a circumferential side wall is arranged at one end of the main body, the first mounting part is arranged on the circumferential side wall, and at least part of the circumferential side wall is arranged in an inclined mode. The motor provided by the application reduces the possibility of mutual contact or collision between the stator assembly and the rotor assembly or even locked-rotor, so that the motor runs more stably.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of clothes treatment devices, in particular to a motor and a clothes treatment device. BACKGROUND

[0002] In the related art, a pulsator washing machine adopts a single support structure motor. However, since the rotating shaft of the motor needs to drive the washing tub through a belt, the belt will be affected by the combined effects of the tensioning force and the unbalanced single-sided electromagnetic force in the motor, which will cause the rotating shaft to be bent and deformed, and further cause the stator assembly and the rotor to contact or collide, or even cause the motor to be blocked, thereby affecting the normal operation of the motor. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art.

[0004] To this end, the first aspect of the present application provides a motor.

[0005] The second aspect of the present application provides a clothes treatment device.

[0006] Therefore, according to the first aspect of the present application, the present application provides a motor, comprising: a stator assembly, the stator assembly comprising a first mounting hole; a rotor assembly, rotatably arranged in the first mounting hole of the stator assembly; a rotating shaft, arranged on the rotor assembly, the rotating shaft rotating with the rotor assembly; an end cover, arranged at one end of the stator assembly, the rotating shaft penetrating through the end cover, the rotating shaft being rotatable relative to the end cover, the end cover comprising a first mounting portion, the first mounting portion protruding from the stator assembly along the circumferential side of the stator assembly, the first mounting portion being used for mounting and fixing the motor; and a bearing assembly, the rotating shaft and the end cover being connected through the bearing assembly, wherein the end cover comprises: a main body, the main body comprising a second mounting hole, the rotating shaft penetrating through the second mounting hole; and a circumferential side wall, arranged at one end of the main body, the first mounting portion being arranged on the circumferential side wall, at least a part of the circumferential side wall being arranged obliquely.

[0007] The motor provided by the present application comprises a stator assembly, a rotor assembly, a rotating shaft, an end cover and a bearing assembly. The stator assembly is mounted on one side of the end cover. The stator assembly has a first mounting hole. The rotor assembly is rotatably arranged in the first mounting hole of the stator assembly. The rotation of the rotor assembly is realized through electromagnetic effect. The rotating shaft is also mounted on the rotor assembly and rotates synchronously with the rotor assembly to realize power output. The end cover is provided with a first mounting portion for mounting and fixing the motor. The rotating shaft extends from the end cover, so that the fixed position of the motor is close to the position where the tensioning force is applied to the rotating shaft. This reduces the possibility of bending and deforming under the combined effects of the tensioning force and the unbalanced single-sided electromagnetic force in the motor, reduces the possibility of the stator assembly and the rotor assembly contacting or colliding with each other, or even being blocked, and makes the motor run more smoothly.

[0008] And the end cover comprises a main body and a circumferential wall, the main body is provided with a second mounting hole, the rotating shaft passes through the second mounting hole and extends out of the second mounting hole, thereby achieving power output on the other side of the end cover, the circumferential wall is arranged at one end of the main body, the first mounting part is arranged on the circumferential wall, and the circumferential wall protrudes from the first mounting part along the radial direction of the stator assembly, the motor can be mounted in the clothes treatment device through the first mounting part, wherein at least part of the circumferential wall is arranged obliquely, and the tensioning force and the direction of the unbalanced single-sided electromagnetic force in the motor are both along the radial direction of the rotating shaft, and further, the anti-deformation ability of the end cover is improved by using the at least part of the circumferential wall arranged obliquely, so as to avoid that the stress of the rotating shaft acts on the end cover and deforms the end cover, and further, the possibility of mutual contact or collision or even locked-rotor of the stator assembly and the rotor assembly is reduced, so that the motor runs more stably.

[0009] A bearing assembly is arranged between the rotating shaft and the end cover, the rotating shaft is connected with an inner ring of the bearing assembly, and the end cover is connected with an outer ring of the bearing assembly, thereby improving the stability of rotation of the rotating shaft and the positioning accuracy of the rotating shaft.

[0010] In addition, the motor provided by the technical scheme can further have the following additional technical features.

[0011] On the basis of the above technical scheme, further, along the axial direction of the rotating shaft, the length of the bearing assembly is a, the maximum safe distance of the gap between the rotor assembly and the bearing assembly is L k , the length of the rotor assembly is b, the distance between one end of the rotor assembly away from the rotating shaft assembly and one end of the bearing assembly away from the rotor assembly is L, the single-sided air gap between the stator assembly and the rotor assembly is Δ, the size of the single-sided magnetic pull between the stator assembly and the rotor assembly is F, and the bending stiffness of the rotating shaft is K, wherein a>L-b-L k ,

[0012] In this technical scheme, along the axial direction of the rotating shaft, a represents the length of the bearing assembly, L k represents the maximum safe distance of the gap between the rotor assembly and the bearing assembly, b represents the length of the rotor assembly, L represents the distance between one end of the rotor assembly away from the rotating shaft assembly and one end of the bearing assembly away from the rotor assembly, Δ represents the single-sided air gap between the stator assembly and the rotor assembly, F represents the size of the single-sided magnetic pull between the stator assembly and the rotor assembly, and K represents the bending stiffness of the rotating shaft.

[0013] In order to ensure that the stator assembly and the rotor assembly do not contact, the following conditions need to be met:

[0014] That is, the bending degree of the rotating shaft during operation is less than the single-sided air gap of the stator assembly and the rotor assembly.

[0015] Then set the equation The magnitude of the unilateral magnetic pull F between the stator assembly and the rotor assembly can be obtained through calculation or experimental measurement.

[0016] The length b of the rotor assembly is determined based on the cooperation between the stator assembly and the rotor assembly.

[0017] The single-sided air gap Δ between the stator assembly and the rotor assembly can be obtained from the design data of the stator assembly and the rotor assembly or through actual measurement.

[0018] The bending stiffness K of the shaft can be calculated from the diameter or material of the shaft, or measured experimentally.

[0019] Therefore, in In this formula, F, K, b, and Δ are all known values; therefore, L can be calculated based on this formula. k This allows us to determine the maximum safe distance L between the rotor assembly and the bearing assembly. k .

[0020] To ensure that the rotor assembly and stator assembly do not come into contact or collide, the distance c between the rotor assembly and the bearing assembly must be less than the maximum safe distance L between them. k .

[0021] Furthermore, c = L - a - b, and consequently a = L - b - c.

[0022] c is less than L k Substituting a = L - b - c, we get a > L - b - L k .

[0023] The length b of the rotor assembly is determined based on the cooperation between the stator assembly and the rotor assembly.

[0024] Since L = a + b + c, integrating the above equations, we can obtain the value of the length a of the bearing assembly.

[0025] Furthermore, the bearing assembly enhances the shaft's resistance to bending, further reducing the possibility of contact or collision between the stator and rotor assemblies, or even stalling, thus making the motor run more smoothly.

[0026] Based on any of the above technical solutions, the end cover further includes: a mounting groove, disposed on the main body, the opening of the mounting groove facing the stator assembly, and a portion of the stator assembly extending into the mounting groove.

[0027] In the technical scheme, the side of the end cover facing the stator assembly is provided with a mounting groove, and part of the stator assembly is located in the mounting groove, thereby improving the compactness of the motor, the position of the first mounting part is close to the middle position of the stator assembly in the axial direction, thereby improving the installation stability of the motor and reducing the shaking degree of the motor.

[0028] On the basis of any of the above technical schemes, further, along the axial direction of the rotating shaft, the depth of the mounting groove is m, the length of the stator assembly extending into the mounting groove is q, and the safety distance between the stator assembly and the end cover is u, wherein m=q+u, and u≥2.5mm.

[0029] In the technical scheme, m represents the depth of the mounting groove, q represents the length of the stator assembly extending into the mounting groove, and u represents the safety distance between the stator assembly and the end cover.

[0030] Since the stator assembly needs to be powered during operation, in order to reduce the possibility of air between the end cover and the stator assembly being broken down by current as much as possible, the stator assembly and the end cover have a certain safety distance u, specifically, the value of u is greater than or equal to 2.5mm.

[0031] Further, m=q+u, and u≥2.5mm.

[0032] On the basis of any of the above technical schemes, further, the end cover further comprises: a reinforcing part provided on the main body.

[0033] In the technical scheme, the reinforcing part is provided on the main body of the end cover, thereby improving the rigidity of the end cover, reducing the possibility of deformation of the end cover, thereby improving the stability of the rotating shaft and improving the positioning accuracy of the rotating shaft.

[0034] On the basis of any of the above technical schemes, further, along the axial direction of the rotating shaft, the thickness of the reinforcing part is Hs; along the inclined direction perpendicular to the peripheral side wall, the thickness of the peripheral side wall is Hx, wherein Hs>Hx.

[0035] In the technical scheme, along the axial direction of the rotating shaft, H2 is the thickness of the reinforcing part, and Hx is the thickness of the peripheral side wall, thereby improving the rigidity of the cover body while reducing the thickness of the peripheral side wall and reducing the mass of the cover body, thereby saving material costs.

[0036] On the basis of any of the above technical schemes, further, the reinforcing part comprises: a plurality of first reinforcing ribs, adjacent first reinforcing ribs are perpendicular to each other.

[0037] In the technical scheme, the reinforcing part comprises a plurality of first reinforcing ribs, and adjacent two first reinforcing ribs are perpendicular to each other, thereby improving the rigidity of the cover body in multiple directions.

[0038] On the basis of any of the preceding technical solutions, further, the reinforcing part further comprises: a plurality of second reinforcing ribs, one second reinforcing rib is arranged between adjacent first reinforcing ribs.

[0039] In this technical solution, the reinforcing part further comprises a plurality of second reinforcing ribs, one second reinforcing rib is arranged between adjacent first reinforcing ribs, thereby further improving the rigidity of the cover body.

[0040] On the basis of any of the preceding technical solutions, further, the included angle between the second reinforcing rib and the first reinforcing rib is greater than or equal to 15 degrees and less than or equal to 40 degrees.

[0041] In this technical solution, the included angle between the first reinforcing rib and the second reinforcing rib is greater than or equal to 15 degrees and less than or equal to 40 degrees, thereby further improving the strength of the end cover.

[0042] On the basis of any of the preceding technical solutions, further, along the axial direction of the rotating shaft, the length of the peripheral side wall and the main body is H2, the distance between the end face of the main body towards the rotor assembly and the end face of the rotor assembly towards the main body is t, wherein a = H2-t, t < 0.5 mm.

[0043] In this technical solution, along the axial direction of the rotating shaft, H2 is the length of the main body, and t is the distance between the end face of the end cover towards the rotor assembly and the end face of the end cover towards the rotor assembly, thereby the rotor assembly needs to rotate, so it cannot be in contact with the end cover, thereby the main body is retracted towards the side away from the rotor, ensuring that the motor structure is compact, allowing the rotor assembly to rotate freely, and reducing the distance between the bearing assembly and the rotor assembly, thereby improving the stability of the rotating shaft.

[0044] On the basis of any of the preceding technical solutions, further, it further comprises: a spacer arranged on the rotating shaft on the side away from the rotor assembly; and a pulley arranged on the rotating shaft on the side away from the rotor assembly.

[0045] In this technical solution, it further comprises a spacer and a pulley, thereby using the spacer to isolate the pulley and the end cover, avoiding friction between the transmission belt and the end cover, and between the pulley and the end cover, thereby improving the service life of the end cover.

[0046] On the basis of any of the preceding technical solutions, further, the rotor assembly comprises: a rotor core, and a relief groove is arranged around at least one end of the rotor core.

[0047] In this technical solution, the rotor assembly comprises a rotor core, and a relief groove is arranged at the end of the rotor core, thereby reducing the diameter of the end of the rotor core, thereby reducing the possibility of contact or collision between the rotor assembly and the stator assembly when the rotating shaft is bent, or even the possibility of locked rotor.

[0048] Further, the first mounting portion is provided with a third mounting hole which is communicated along the axial direction of the rotating shaft.

[0049] In this technical solution, the motor is fixed by the screw passing through the third mounting hole on the first mounting portion, thereby reducing the installation difficulty of the motor, improving the production efficiency, and facilitating the disassembly or maintenance of the motor.

[0050] Further, the motor further comprises a connecting piece, and the stator assembly and the end cover are connected through the connecting piece.

[0051] In this technical solution, the stator assembly and the end cover are connected through the connecting piece, thereby fixing the stator assembly and the end cover, reducing the installation difficulty of the motor, improving the production efficiency, and facilitating the disassembly or maintenance of the motor.

[0052] According to the second aspect of the present application, the present application provides a clothes treatment device, comprising: a fixing portion; a motor as any one of the above technical solutions, wherein the stator assembly of the motor is placed in the fixing portion, and the first mounting portion of the motor is connected with the fixing portion.

[0053] The clothes treatment device provided by the present application has all the beneficial effects of the motor as any one of the above technical solutions, and thus will not be described one by one.

[0054] The additional aspects and advantages of the present application will become apparent from the following description part, or be understood through the practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0055] The above and / or additional aspects and advantages of the present application will become apparent and more readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings in which:

[0056] Figure 1 Fig. 1 shows a structural schematic diagram of a motor provided by an embodiment of the present application;

[0057] Figure 2 Fig. 2 shows a structural schematic diagram of a motor provided by an embodiment of the present application;

[0058] Figure 3 Fig. 3 shows an exploded view of a motor provided by an embodiment of the present application;

[0059] Figure 4 Fig. 4 shows an exploded view of a rotor assembly, a bearing assembly, a rotating shaft and an end cover in a motor provided by an embodiment of the present application;

[0060] Figure 5 Fig. 5 shows a structural schematic diagram of a rotor assembly and a rotating shaft in a motor provided by an embodiment of the present application;

[0061] Figure 6 Fig. 1 shows a structural schematic diagram of a rotor assembly and an end cover in a motor according to an embodiment of the present application;

[0062] Figure 7 Fig. 2 shows a structural schematic diagram of an end cover in a motor according to an embodiment of the present application;

[0063] Figure 8 Fig. 3 shows a structural schematic diagram of a rotating shaft, a rotor assembly and a bearing assembly in a motor according to an embodiment of the present application;

[0064] Figure 9 Fig. 4 shows a structural schematic diagram of an end cover in a motor according to an embodiment of the present application;

[0065] Figure 10 Fig. 5 shows a structural schematic diagram of an end cover in a motor according to an embodiment of the present application;

[0066] Figure 11 Fig. 6 shows a structural schematic diagram of a motor according to an embodiment of the present application;

[0067] Figure 12 Fig. 7 shows a structural schematic diagram of a motor according to an embodiment of the present application;

[0068] Figure 13 Fig. 8 shows a partial enlarged view of a motor as shown in Fig. 7 at Z; Figure 12

[0069] Fig. 9 shows a partial enlarged view of a motor according to an embodiment of the present application; Figure 14

[0070] Fig. 10 shows a curve reflecting the relationship between an included angle Y between a first reinforcing rib and a second reinforcing rib in a motor according to an embodiment of the present application and a stiffness coefficient and a heat dissipation coefficient. Figure 15 wherein,

[0071] The correspondence between the reference signs and the component names in the drawings is as follows: Figures 1 to 15 100 motor, 110 stator assembly, 120 rotor assembly, 122 avoiding groove, 130 rotating shaft, 140 end cover, 142 first mounting portion, 144 main body, 146 circumferential side wall, 148 first reinforcing rib, 150 second reinforcing rib, 152 mounting groove, 154 third mounting hole, 156 second mounting hole, 160 spacer, 170 belt wheel, 180 rotor core, 190 connecting piece, 200 bearing assembly, 202 first bearing, 204 second bearing.

[0072] DETAILED DESCRIPTION

[0073] ​In order to enable a more clear understanding of the above-mentioned objects, features and advantages of the present application, the present application will be further described in conjunction with the following drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0074] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, however, the present application can also be implemented in other manners different from those described herein, and therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0075] Hereinafter, the motor 100 and the clothes treating apparatus according to some embodiments of the present application will be described with reference to the accompanying drawings. Figures 1 to 15

[0076] Embodiment 1:

[0077] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 11 and Figure 12 , the present application provides a motor 100, comprising: a stator assembly 110, a rotor assembly 120, a rotating shaft 130, an end cover 140 and a bearing assembly 200, the stator assembly 110 has a first mounting hole in the middle part, the rotor assembly 120 is arranged in the first mounting hole of the stator assembly 110, so as to realize the rotation of the rotor assembly 120 by the electromagnetic effect of the stator assembly 110 and the rotor assembly 120.

[0078] Specifically, the stator assembly 110 comprises: a stator core and a winding, the stator core comprises a stator yoke and a stator tooth arranged in the inner circle of the stator yoke, the winding is wound on the stator slot, and a magnetic field is generated when the winding is electrified.

[0079] The rotor assembly 120 comprises a rotor core 180 and a magnetic member, the magnetic member is arranged on the rotor core 180, and the magnetic field is generated when the winding of the stator assembly 110 is electrified, and the magnetic field can act on the magnetic member to drive the magnetic member to move, so as to realize the rotation of the rotor assembly 120. As shown in Figure 5 The rotor assembly 120 and the rotating shaft 130 are connected.

[0080] Further, the stator assembly 110 and the end cover 140 are connected, so as to realize the fixation of the stator assembly 110, the rotating shaft 130 is arranged on the rotor assembly 120 and passes through the end cover 140, and the bearing assembly 200 is arranged between the rotating shaft 130 and the end cover 140, the single-side fixation of the rotating shaft 130 is realized by the bearing assembly 200, so as to reduce the overall size of the motor 100, and the stability of the rotation of the rotating shaft 130 relative to the end cover 140 can be improved by the connection mode of the bearing.

[0081] ​Further, the end cover 140 comprises a main body 144 and a circumferential side wall 146 arranged at one end of the main body 144, and the circumferential side wall 146 is provided with a first mounting portion 142 for mounting and fixing the motor 100. Specifically, the first mounting portion 142 is located at the end of the circumferential side wall 146 away from the main body 144.

[0082] The motor 100 provided by the application comprises a stator assembly 110, a rotor assembly 120, a rotating shaft 130 and an end cover 140. The stator assembly 110 is mounted on one side of the end cover 140. The stator assembly 110 is provided with a first mounting hole. The rotor assembly 120 is rotatably arranged in the first mounting hole of the stator assembly 110. Through electromagnetic effect, the rotation of the rotor assembly 120 is realized. The rotating shaft 130 is further mounted on the rotor assembly 120 and rotates synchronously with the rotor assembly 120, thereby realizing power output. The end cover 140 is provided with a first mounting portion 142 for mounting and fixing the motor 100. The rotating shaft 130 extends out of the end cover 140, thereby reducing the possibility of bending deformation of the motor 100 under the combined influence of the tension force on the rotating shaft 130 and the unbalanced single-sided electromagnetic force in the motor 100, reducing the possibility of mutual contact or collision between the stator assembly 110 and the rotor assembly 120, or even locked-rotor, and making the motor 100 run more smoothly.

[0083] Further, the end cover 140 comprises a main body 144 and a circumferential side wall 146 arranged at one end of the main body 144, and the circumferential side wall 146 is provided with a first mounting portion 142 for mounting and fixing the motor 100. Specifically, the first mounting portion 142 is located at the end of the circumferential side wall 146 away from the main body 144.

[0084] And, a bearing assembly 200 is arranged between the rotating shaft 130 and the end cover 140, the rotating shaft 130 is connected with the inner ring of the bearing assembly 200, and the end cover 140 is connected with the outer ring of the bearing assembly 200, thereby improving the stability of the rotating shaft 130 rotating, and improving the positioning accuracy of the rotating shaft 130.

[0085] The bearing assembly 200 can include one or more bearings, and the bearings can be rolling bearings or sliding bearings.

[0086] The end cover 140 can be an integral structure, that is, the main body 144, the peripheral sidewall 146 and the first mounting portion 142 are integrally casted.

[0087] The motor 100 meets the single support structure form, and has sufficient rigidity under the tension of the belt pulley 170, so as to reduce the deflection of the stator assembly 110 and the rotor assembly 120, reduce the possibility of contact and collision between the stator assembly 110 and the rotor assembly 120, and even stall, meet the requirements of the system against vibration, and the side of the rotating shaft 130 away from the end cover 140 can also be provided with a bearing structure to realize double support of the rotating shaft 130.

[0088] Embodiment 2:

[0089] As shown in Figure 8 and Figure 14 based on embodiment 1, further, the length of the bearing assembly 200 is defined as a based on the axial direction of the rotating shaft 130, wherein when the bearing assembly 200 includes multiple bearings, a represents the specific distance between the end faces of the two outermost bearings away from each other, for example, when the bearing assembly 200 includes the first bearing 202 and the second bearing 204, a represents the distance between the end face of the first bearing 202 away from the second bearing 204 and the end face of the second bearing 204 away from the first bearing 202. Wherein, the first bearing 202 and the end cover 140 are provided with an elastic baffle ring based on the axial direction of the rotating shaft 130, so as to reduce the distance between the rotating shaft 130 assembly and the bearing assembly 200 and the rotor assembly 120, and reduce the bending degree of the rotating shaft 130.

[0090] In this embodiment, the maximum safe distance of the gap between the rotor assembly 120 and the bearing assembly 200 is defined as L k , the gap between the rotor assembly 120 and the bearing assembly 200 is defined as c, and the maximum value of c is L k .

[0091] The length of the rotor assembly 120 is defined as b based on the axial direction of the rotating shaft 130.

[0092] L represents the distance between the end of the rotor assembly 120 away from the shaft 130 and the end of the bearing assembly 200 away from the rotor assembly 120, with the axial direction of the shaft 130 as the reference.

[0093] Δ represents the single-sided air gap between the stator assembly 110 and the rotor assembly 120.

[0094] F represents the single-sided magnetic force between the stator assembly 110 and the rotor assembly 120.

[0095] K represents the bending stiffness of the shaft 130.

[0096] wherein a satisfies: a > L - b - L k ,

[0097] In this embodiment, a represents the length of the bearing assembly 200, with the axial direction of the shaft 130 as the reference.

[0098] L k represents the maximum safe distance of the gap between the rotor assembly 120 and the bearing assembly 200, with the axial direction of the shaft 130 as the reference. k .

[0099] c represents the gap between the rotor assembly 120 and the bearing assembly 200, with the axial direction of the shaft 130 as the reference, and the maximum value of c is L k .

[0100] b represents the length of the rotor assembly 120, with the axial direction of the shaft 130 as the reference.

[0101] L represents the distance between the end of the rotor assembly 120 away from the shaft 130 and the end of the bearing assembly 200 away from the rotor assembly 120, with the axial direction of the shaft 130 as the reference.

[0102] Δ represents the single-sided air gap between the stator assembly 110 and the rotor assembly 120.

[0103] F represents the single-sided magnetic force between the stator assembly 110 and the rotor assembly 120.

[0104] K represents the bending stiffness of the shaft 130.

[0105] For the mechanical analysis of the shaft 130, in order to ensure that the stator assembly 110 and the rotor assembly 120 do not come into contact, the following needs to be satisfied: That is, the degree of bending of the shaft 130 when the motor 100 is running needs to be less than the single-sided air gap of the stator assembly 110 and the rotor assembly 120.

[0106] Further, the equation The solution is c=Lk, that is, the maximum value of the gap c between the rotor assembly 120 and the bearing assembly 200 is L in the axial direction of the rotating shaft 130 k .

[0107] To ensure that the rotor assembly 120 and the stator assembly 110 do not contact or collide, the distance c between the rotor assembly 120 and the bearing assembly 200 needs to be less than the maximum safe distance L between the rotor assembly 120 and the bearing assembly 200 k .

[0108] And c=L-a-b, and further a=L-b-c.

[0109] c is less than L k Substitute a=L-b-c, that is, a>L-b-L k .

[0110] Where the length b of the rotor assembly 120 is determined based on the cooperation of the stator assembly 110 and the rotor assembly 120.

[0111] And L=a+b+c, and further the above equation can be integrated to obtain the value of the length a of the bearing assembly 200.

[0112] Further, through the support of the bearing assembly 200, the bending resistance of the rotating shaft 130 is improved, further reducing the possibility of mutual contact or collision between the stator assembly 110 and the rotor assembly 120, and even the possibility of blocking the rotor, so that the motor 100 runs more smoothly.

[0113] Specifically, the equation is set as Where the single-sided magnetic pull F between the stator assembly 110 and the rotor assembly 120 can be calculated or measured by experiment.

[0114] The length b of the rotor assembly 120 is determined based on the cooperation of the stator assembly 110 and the rotor assembly 120.

[0115] The single-sided air gap Δ between the stator assembly 110 and the rotor assembly 120 can be obtained through the design data of the stator assembly 110 and the rotor assembly 120 or by actual measurement.

[0116] The bending stiffness K of the rotating shaft 130 can be calculated by the diameter or material of the rotating shaft 130, or measured by experiment.

[0117] Therefore, in F, K, b and Δ are all known values, and further L k can be calculated based on the formula, and further the maximum safe distance L k between the rotor assembly 120 and the bearing assembly 200 can be determined.

[0118] Embodiment 3

[0119] As shown in Figure 4 , Figure 6 , Figure 7 and Figure 10 , on the basis of Embodiment 1 or Embodiment 2, further, the end cover 140 further comprises: a mounting groove 152 arranged on the main body 144, the mounting groove 152 is arranged at one end of the main body 144 towards the stator assembly 110, and part of the stator assembly 110 can extend into the mounting groove 152 through the opening of the mounting groove 152. Specifically, the end cover 140 comprises a bearing mounting portion, the bearing assembly 200 is mounted on the bearing mounting portion, the second mounting hole 156 is arranged on the bearing mounting portion, and the mounting groove 152 is arranged around the peripheral side of the bearing mounting portion.

[0120] In this embodiment, the side of the end cover 140 towards the stator assembly 110 is provided with the mounting groove 152, and part of the stator assembly 110 is located in the mounting groove 152, thereby improving the compactness of the motor 100, so that the position of the first mounting portion 142 is close to the middle position of the stator assembly 110 in the axial direction, thereby improving the installation stability of the motor 100 and reducing the shaking degree of the motor 100.

[0121] Embodiment 4

[0122] As shown in Figure 11 , on the basis of Embodiment 3, further, the depth of the mounting groove 152 is defined as m with the axial direction of the rotating shaft 130 as the reference.

[0123] The length of the stator assembly 110 extending into the mounting groove 152 is defined as q with the axial direction of the rotating shaft 130 as the reference.

[0124] The safety distance between the stator assembly 110 and the end cover 140 is defined as u with the axial direction of the rotating shaft 130 as the reference.

[0125] Wherein, m=q+u, and u≥2.5mm.

[0126] In this embodiment, m represents the depth of the mounting groove 152 with the axial direction of the rotating shaft 130 as the reference.

[0127] q represents the length of the stator assembly 110 extending into the mounting groove 152 with the axial direction of the rotating shaft 130 as the reference.

[0128] u represents the safety distance between the stator assembly 110 and the end cover 140 with the axial direction of the rotating shaft 130 as the reference.

[0129] In order to reduce the possibility of air between the end cover 140 and the stator assembly 110 being broken down by current when the stator assembly 110 is energized in operation, the stator assembly 110 and the end cover 140 are required to have a certain safety distance u, and specifically, the value of u is greater than or equal to 2.5 mm.

[0130] Further, m = q + u, and u ≥ 2.5 mm.

[0131] Embodiment 5

[0132] As shown in Figure 3 , Figure 6 , Figure 7 and Figure 9 , on the basis of any one of Embodiments 1 to 4, further, the end cover 140 further comprises a reinforcing portion provided on the main body 144.

[0133] In this embodiment, the reinforcing portion is provided on the main body 144 of the end cover 140, thereby improving the rigidity of the end cover 140, reducing the possibility of deformation of the end cover 140, thereby improving the stability of rotation of the rotating shaft 130, and improving the positioning accuracy of the rotating shaft 130.

[0134] Specifically, the reinforcing portion, the main body 144, the peripheral side wall 146 and the first mounting portion 142 can be an integral structure, and are formed by integral casting.

[0135] Embodiment 6

[0136] As shown in Figure 11 , on the basis of any one of Embodiments 1 to 5, further, the thickness of the reinforcing portion is defined as Hs with reference to the axial direction of the rotating shaft 130.

[0137] The thickness of the peripheral side wall 146 is defined as Hx with reference to the direction perpendicular to the inclination direction of the peripheral side wall 146.

[0138] Wherein, Hs > Hx.

[0139] In this embodiment, Hs represents the thickness of the reinforcing portion with reference to the axial direction of the rotating shaft 130.

[0140] Hx represents the thickness of the peripheral side wall 146 with reference to the direction perpendicular to the inclination direction of the peripheral side wall 146.

[0141] Further, Hs > Hx, which improves the rigidity of the cover body while reducing the thickness of the peripheral side wall 146, reducing the mass of the cover body, and saving material costs.

[0142] Embodiment 7

[0143] As shown in Figure 9As shown, based on Embodiment 6, the reinforcing part further includes: a plurality of spaced first reinforcing ribs 148, wherein two adjacent first reinforcing ribs 148 are perpendicular to each other.

[0144] In this embodiment, the reinforcing part includes a plurality of first reinforcing ribs 148 arranged at intervals, with two adjacent first reinforcing ribs 148 perpendicular to each other, thereby improving the rigidity of the cover in multiple directions.

[0145] Specifically, there are four first reinforcing ribs 148 connected to the side wall of the bearing mounting part. Furthermore, the first reinforcing ribs 148 protrude from both ends of the main body 144, thereby further strengthening the rigidity of the end cover 140.

[0146] Furthermore, the first reinforcing rib 148 is arranged around the bearing mounting portion and is connected to the bearing mounting portion, providing support for the end cover 140 in four directions of the bearing mounting portion, thereby improving the rigidity of the end cover 140.

[0147] Example 8:

[0148] like Figure 9 As shown, based on Embodiment 7, the reinforcing part further includes a plurality of spaced second reinforcing ribs 150, with a second reinforcing rib 150 disposed between two adjacent first reinforcing ribs 148.

[0149] In this embodiment, the reinforcing part also includes a plurality of second reinforcing ribs 150, with a second reinforcing rib 150 disposed between two adjacent first reinforcing ribs 148, thereby further improving the rigidity of the cover.

[0150] Specifically, there are four second reinforcing ribs 150, which are respectively arranged between two different first reinforcing ribs 148. Furthermore, the second reinforcing ribs 150 protrude from both ends of the main body 144, thereby further strengthening the rigidity of the end cap 140.

[0151] Furthermore, the second reinforcing rib 150 is provided around the bearing mounting portion, and the second reinforcing rib 150 is connected to the bearing mounting portion, providing support for the end cover 140 in four directions of the bearing mounting portion, thereby improving the rigidity of the end cover 140.

[0152] Example 9:

[0153] like Figure 9 As shown, based on Embodiment 8, the second reinforcing rib 150 and the adjacent first reinforcing rib 148 form a small included angle Y. The included angle Y is greater than or equal to 15 degrees and less than or equal to 40 degrees, that is, 15°≤Y≤40°.

[0154] In this embodiment, the angle Y formed between the second reinforcing rib 150 and the adjacent first reinforcing rib 148 is greater than or equal to 15 degrees and less than or equal to 40 degrees, thereby further enhancing the strength of the end cap 140.

[0155] Specifically, with any one of the first reinforcing ribs 148 as the symmetrical element, the multiple second reinforcing ribs 150 are all arranged symmetrically.

[0156] Furthermore, the second reinforcing rib 150 and the adjacent first reinforcing rib 148 form a small included angle Y of 30 degrees, which not only improves the rigidity of the cover, but also increases the space between the adjacent first reinforcing rib 148 and second reinforcing rib 150, thereby facilitating heat dissipation of the motor 100 and improving the stability of the motor 100 operation.

[0157] Among them, such as Figure 15 As shown, the stiffness coefficient gradually decreases with increasing Y, while the heat dissipation coefficient first increases and then decreases with increasing Y. Therefore, when 15°≤Y≤40°, both the heat dissipation coefficient and stiffness coefficient remain at an optimal state. When Y is 30°, the stiffness coefficient and heat dissipation coefficient reach a balance. Thus, the value of Y can be adjusted to meet different requirements for stiffness and heat dissipation. Figure 15 The stiffness coefficient and heat dissipation coefficient in the figure are relative coefficients. They only indicate the magnitude of stiffness and the quality of heat dissipation, and do not represent specific absolute values.

[0158] Example 10:

[0159] like Figure 10 and Figure 11 As shown, based on any of Embodiments 1 to 9, the length of the peripheral sidewall 146 and the main body 144 is further defined as H2, with the axial direction of the rotating shaft 130 as the reference.

[0160] With the axial direction of the rotating shaft 130 as a reference, the distance between the end face of the main body 144 facing the rotor assembly 120 and the end face of the rotor assembly 120 facing the main body 144 is defined as t.

[0161] Where a = H2 - t, t < 0.5 mm.

[0162] Where H2 = n + m, m is the distance between the end cap 140 facing the rotor assembly 120 and the reinforcing part, with the axial direction of the rotating shaft 130 as the reference. n is the distance between the end of the reinforcing part facing the rotor assembly 120 and the end of the main body 144 away from the rotor assembly 120, with the axial direction of the rotating shaft 130 as the reference.

[0163] In this embodiment, H2 represents the length of the main body 144 in the axial direction of the rotating shaft 130.

[0164] T represents the distance between the end face of the end cover 140 facing one end of the rotor assembly 120 and the end face of the end cover 140 facing one end of the rotor assembly 120 in the axial direction of the rotating shaft 130.

[0165] Since the rotor assembly 120 needs to rotate, it cannot be in contact with the end cover 140, and thus the main body 144 is retracted to the side away from the rotor, ensuring that the motor 100 is compact in structure, allowing the rotor assembly 120 to rotate freely, and reducing the distance between the bearing assembly 200 and the rotor assembly 120, improving the stability of the rotating shaft 130.

[0166] Further, H1 represents the thickness of the end cover 140 in the axial direction of the rotating shaft 130, and thus H1 is greater than H2, that is, the reinforcing portion protrudes from the main body 144 on the side away from the rotor assembly 120, thereby improving the rigidity of the end cover 140.

[0167] Embodiment 11:

[0168] As shown in Figure 2 , Figure 3 , Figure 11 and Figure 12 , on the basis of any one of embodiments 1 to 10, further, the motor 100 further comprises a spacer 160 and a pulley 170, the spacer 160 and the pulley 170 are arranged on the side of the end cover 140 away from the stator assembly 110, and the spacer 160 is arranged between the pulley 170 and the end cover 140.

[0169] In this embodiment, the motor 100 further comprises a spacer 160 and a pulley 170, and thus the spacer 160 is used to isolate the pulley 170 and the end cover 140, avoiding friction between the transmission belt and the end cover 140, and between the pulley 170 and the end cover 140, thereby improving the service life of the end cover 140. When the motor 100 is working, the transmission belt is tensioned to improve the stability of rotation and transmission efficiency.

[0170] Specifically, the spacer 160 can be a shaft sleeve, and the motor 100 further comprises a shaft sleeve and a pulley 170, and thus the shaft sleeve is used to isolate the pulley 170 and the end cover 140, and to provide positioning for the pulley 170, avoiding friction between the transmission belt and the end cover 140, and between the pulley 170 and the end cover 140, thereby improving the service life of the end cover 140.

[0171] Specifically, the spacer 160 can be an elastic retainer, and the motor 100 further comprises the elastic retainer and the pulley 170, so as to isolate the pulley 170 and the end cover 140 by the elastic retainer, and provide positioning for the pulley 170, avoid friction between the transmission belt and the end cover 140, and between the pulley 170 and the end cover 140, and improve the service life of the end cover 140.

[0172] Specifically, the spacer 160 can be an elastic retainer and a bushing, and the motor 100 further comprises the elastic retainer, the bushing and the pulley 170, so as to isolate the pulley 170 and the end cover 140 by the elastic retainer and the bushing, wherein the elastic retainer is located between the bushing and the bearing assembly 200, and provide positioning for the pulley 170, avoid friction between the transmission belt and the end cover 140, and between the pulley 170 and the end cover 140, and improve the service life of the end cover 140.

[0173] Embodiment 12:

[0174] As shown in Figure 12 and Figure 13 on the basis of any one of embodiments 1 to 11, further, the rotor assembly 120 comprises a rotor core 180 and a magnetic piece, the side of the rotor core 180 facing the end cover 140 is provided with a relief groove 122, or the side of the rotor core 180 away from the end cover 140 is provided with a relief groove 122, or the side of the rotor core 180 facing the end cover 140 is provided with a relief groove 122 and the side of the rotor core 180 away from the end cover 140 is provided with a relief groove 122.

[0175] Wherein, the relief groove 122 is arranged around the circumferential side of the rotor core 180, that is, when the rotating shaft 130 is bent to a certain extent, the rotor assembly 120 is inclined, and due to the existence of the relief groove 122, the inclination angle of the rotor assembly 120 within the safe range is increased, thereby further reducing the possibility of contact or collision between the rotor assembly 120 and the stator assembly 110, or even locked-rotor.

[0176] Wherein, the length of the relief groove 122 is f with the axial direction of the rotor assembly 120 as the reference, and the length of the relief groove 122 is e with the radial direction of the rotor assembly 120 as the reference. Further, the sizes of f and e are adjusted as needed to meet the needs of different motors 100.

[0177] Embodiment 13:

[0178] As shown in Figure 3 and Figure 9 on the basis of any one of embodiments 1 to 12, further, a third mounting hole 154 is provided on the first mounting portion 142, the third mounting hole 154 is communicated along the axial direction of the rotating shaft 130, and the motor 100 can be installed at a specific position by means of screws or other components.

[0179] In this embodiment, the fixing of the motor 100 is achieved by the screw passing through the third mounting hole 154 on the first mounting part 142, thereby reducing the installation difficulty of the motor 100, improving the production efficiency, and facilitating the disassembly or maintenance of the motor 100.

[0180] Specifically, the number of the third mounting hole 154 is multiple, for example, the number of the third mounting hole 154 is two, the number of the third mounting hole 154 is three, the number of the third mounting hole 154 is four, the number of the third mounting hole 154 is five, or the number of the third mounting hole 154 is six, etc.

[0181] Embodiment 14:

[0182] As shown in any one of Embodiments 1 to 13, further, the motor 100 further comprises a connecting piece 190 for connecting the stator assembly 110 and the end cover 140. Figure 3 In this embodiment, the stator assembly 110 and the end cover 140 are connected through the connecting piece 190, thereby achieving the fixing of the stator assembly 110 and the end cover 140, thereby reducing the installation difficulty of the motor 100, improving the production efficiency, and facilitating the disassembly or maintenance of the motor 100.

[0183] Specifically, the connecting piece 190 can be a screw or the like.

[0184] The number of the connecting piece 190 is multiple, for example, the number of the connecting piece 190 is two, the number of the connecting piece 190 is three, the number of the connecting piece 190 is four, the number of the connecting piece 190 is five, or the number of the connecting piece 190 is six, etc.

[0185] Embodiment 15:

[0186] As shown in any one of Embodiments 1 to 13, further, the motor 100 further comprises a connecting piece 190 for connecting the stator assembly 110 and the end cover 140.

[0187] Figures 1 to 14 Further, the bearing assembly 200 can comprise one bearing, two bearings, or more than three bearings, and the type of the bearing can be a rolling bearing or a sliding bearing.

[0188] Further, the bearing assembly 200 can comprise one bearing, two bearings, or more than three bearings, and the type of the bearing can be a rolling bearing or a sliding bearing.

[0189] ​Further, the rotor assembly 120 and the stator assembly 110 are ensured to not contact, not collide and the motor 100 is not blocked under the influence of adverse factors in normal working conditions.

[0190] Further, an elastic baffle ring or a shaft sleeve can be arranged between the end cover 140 and the belt pulley 170.

[0191] With the axial direction of the rotating shaft 130 as a reference, the maximum length a between the first bearing 202 and the second bearing 204 needs to meet that the motor 100 does not contact and collide between the stator assembly 110 and the rotor assembly 120, and even blocked under the single support structure.

[0192] Further, the bearing assembly 200 includes two rolling bearings, facilitating the positioning and installation of the bearings and the rotating shaft 130.

[0193] Further, an avoiding groove 122 can be arranged at least at one end of the rotor core 180.

[0194] The motor 100 provided by the application overcomes the difficulty of reducing the cost of the motor 100 of the existing pulsator washing machine, saves a rear cover structure through the single support structure, thereby saving material cost, processing cost and assembly process cost, and achieving the purpose of reducing cost and increasing efficiency.

[0195] The motor 100 provided by the application, one end of the rotating shaft 130 is supported on the end cover 140 and the other end is suspended; the belt pulley 170 is connected to the pulsator of the clothes treatment device through a transmission belt, the transmission belt has tension in normal working conditions; the rotating shaft 130 is provided with a shaft sleeve on one side of the belt pulley 170, the shaft sleeve can be replaced by other limiting structures such as an elastic baffle ring; the end cover 140 is fixed on the fixed part of the clothes treatment device through the first mounting part 142 by bolts, which can ensure that the single support motor 100 does not contact and collide between the stator assembly 110 and the rotor assembly 120 and other operation malfunctions such as blocked, the end cover 140 is connected to the rotating shaft 130 through the bearing assembly 200; the bearing assembly 200 supports the rotating shaft 130, the bearings can be rolling bearings, sliding bearings or other types of bearings, and the number of bearings can be one, two or more; the elastic baffle ring is used to limit the axial position of the bearings; the rotor assembly 120 is fixed on the rotating shaft 130, the rotor assembly 120 includes a rotor core 180, a cast aluminum fan blade and a winding or a magnetic member, the rotor core 180 drives the rotating shaft 130 to rotate under the action of electromagnetic torque; the stator assembly 110 is fixed on the end cover 140 through screws, and the stator assembly 110 includes a stator core and a coil and other assemblies.

[0196] The rotating shaft 130 is subjected to mechanical analysis, in order to ensure that the stator assembly 110 and the rotor assembly 120 do not contact, the following needs to be met: That is, the bending degree of the rotating shaft 130 during the operation of the motor 100 is less than the single-side air gap of the stator assembly 110 and the rotor assembly 120.

[0197] Further, the equation The solution is c=Lk, that is, the maximum value of the gap c between the rotor assembly 120 and the bearing assembly 200 is Lk based on the axial direction of the rotating shaft 130. k .

[0198] In order to ensure that the rotor assembly 120 and the stator assembly 110 do not contact or collide, the distance c between the rotor assembly 120 and the bearing assembly 200 needs to be less than the maximum safe distance L between the rotor assembly 120 and the bearing assembly 200. k .

[0199] And c=L-a-b, and further a=L-b-c.

[0200] c is less than L k Substitute a=L-b-c, that is, a>L-b-L k .

[0201] The distance between the end surface of the main body 144 at one end of the rotor assembly 120 and the end surface of the rotor assembly 120 at one end of the main body 144 is defined as t based on the axial direction of the rotating shaft 130.

[0202] Wherein, a=H2-t, t<0.5mm.

[0203] That is, L-b-L k a<H2-0.5mm.

[0204] When the motor 100 includes the first bearing 202 and the second bearing 204, during the installation of the motor 100, the second bearing 204 can be first pressed into the bearing mounting portion of the end cover 140 away from the rotor assembly 120, then the first bearing 202 is pressed into the bearing mounting portion of the end cover 140 towards the rotor assembly 120, finally the rotating shaft 130 is passed through the first bearing 202 and the second bearing 204, and after being installed at the corresponding position, the shaft sleeve is installed, and finally the pulley 170 is pressed into the corresponding position of the rotating shaft 130.

[0205] The inner ring of the second bearing 204 is in clearance fit with the rotating shaft 130, the outer ring of the second bearing 204 is in interference fit with the bearing mounting portion of the end cover 140, the inner ring of the first bearing 202 is in interference fit with the rotating shaft 130, the outer ring of the first bearing 202 is in clearance fit with the bearing mounting portion of the end cover 140, and the elastic retainer is arranged between the outer ring of the first bearing 202 and the bottom wall of the bearing mounting portion of the end cover 140. The two bearings are axially limited by the elastic retainer, the step of the bearing mounting portion, the shaft sleeve and the pulley 170, which can overcome the effect of the self-weight of the rotor assembly 120 and the axial magnetic force.

[0206] In order to overcome the problem of weak radial stiffness of the motor 100 of the single support structure, m≥q+2.5mm. The height Hs of the reinforcing part is greater than the inclined height Hx of the peripheral side wall 146, so that the mass of the end cover 140 can be effectively reduced on the premise that the end cover 140 has sufficient stiffness, and in principle, the height Hs of the reinforcing part should be as large as possible, and the thickness of the reinforcing part can be appropriately controlled.

[0207] By analyzing the change of the included angle between the first reinforcing rib 148 and the second reinforcing rib 150, the heat dissipation effect data and the stiffness data of the end cover 140 are obtained. When the included angle Y between the first reinforcing rib 148 and the second reinforcing rib 150 is in the range of 15° to 40°, better stiffness and heat dissipation effect of the end cover 140 can be obtained at the same time, and specifically, Y=30°.

[0208] When it is necessary to strictly control the overall weight of the motor 100, the structure of the end cover 140 may not achieve the expected stiffness effect due to the limitation of the material used. In order to avoid contact and collision between the stator assembly 110 and the rotor assembly 120 during normal operation, an avoidance groove 122 can be arranged on the side of the rotor core 180 away from the end cover 140, that is, a certain part of the rotor core 180 is cut off. Specifically, a part of the rotor core 180 is cut off along the radial distance e and the axial distance f, and the specific cutting size is determined according to the overall size of the motor 100.

[0209] Embodiment 16:

[0210] The application provides a clothes treatment device, comprising: a fixed part; the motor 100 provided in any of the above embodiments, the stator assembly 110 of the motor 100 is placed in the fixed part, and the first mounting part 142 of the motor 100 is connected with the fixed part.

[0211] The clothes treatment device provided by the application has all the beneficial effects of the motor 100 provided by any of the above embodiments, and thus is not described one by one here.

[0212] Specifically, the clothes treatment device has a fixed part, for example, a fixed plate. The fixed part can be provided with a receiving groove for placing the end cover 140 of the stator assembly 110, and the fixed part is connected with the end cover 140 through screws or other components. The belt wheel 170 is connected with the washing barrel or washing drum of the clothes treatment device through a transmission belt.

[0213] The clothes treatment device is a washing machine, for example, a pulsator washing machine or a drum washing machine.

[0214] In the present application, the terms "first", "second", "third" are used only for descriptive purposes and are not to be construed as indicating or implying relative importance. The term "multiple" refers to two or more, unless otherwise explicitly specified. The terms "mounting", "connecting", "connection", "fixing" and the like are to be broadly interpreted, for example, "connection" can be fixed connection, or detachable connection, or integral connection; "connection" can be direct connection, or indirect connection through intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0215] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or unit referred to must have a particular direction, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0216] In the description of the present application, the terms "one embodiment", "some embodiments", "a specific embodiment" and the like are intended to mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0217] The above is only the preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. An electric machine characterized in that, The motor comprises: a stator assembly comprising a first mounting hole; a rotor assembly rotatably arranged in the first mounting hole; a rotating shaft arranged in the rotor assembly, the rotating shaft being rotatable with the rotor assembly; an end cover arranged at one end of the stator assembly, the rotating shaft penetrating through the end cover, the rotating shaft being rotatable relative to the end cover, the end cover comprising a first mounting portion protruding from the stator assembly along a circumferential side of the stator assembly, the first mounting portion being used for mounting and fixing the motor; a bearing assembly connecting the rotating shaft and the end cover, wherein the end cover comprises: a main body comprising a second mounting hole, the rotating shaft penetrating through the second mounting hole; a circumferential side wall arranged at one end of the main body, the first mounting portion being arranged on the circumferential side wall, at least a part of the circumferential side wall being arranged in an inclined manner; wherein one end of the rotating shaft is supported on the end cover and the other end of the rotating shaft is suspended, a bending degree of the rotating shaft during operation of the motor being smaller than a single-side air gap of the stator assembly and the rotor assembly; the end cover further comprises a mounting groove arranged on the main body, an opening of the mounting groove facing the stator assembly, a part of the stator assembly extending into the mounting groove, and the first mounting portion being located close to a middle position of the stator assembly in an axial direction.

2. The motor according to claim 1, wherein: The length of the bearing assembly along the axial direction of the rotating shaft is a, and the maximum safe distance of the gap between the rotor assembly and the bearing assembly is L k The length of the rotor assembly is b, and the distance between the end of the rotor assembly away from the rotating shaft assembly and the end of the bearing assembly away from the rotor assembly is L. a single-side air gap between the stator assembly and the rotor assembly is Δ, a single-side magnetic pulling force between the stator assembly and the rotor assembly is F, and a bending stiffness of the rotating shaft is K. wherein a > L - b - L k , 3. The motor according to claim 1 or 2, wherein: in an axial direction of the rotating shaft, a depth of the mounting groove is m, a length of the stator assembly extending into the mounting groove is q, and a safety distance between the stator assembly and the end cover is u, wherein m = q + u, and u ≥ 2.5 mm.

4. The electric machine of claim 2, wherein, The end cover further comprises: a reinforcing portion arranged on the main body.

5. The motor according to claim 4, wherein: in the axial direction of the rotating shaft, a thickness of the reinforcing portion is Hs; in a direction perpendicular to the inclined direction of the circumferential side wall, a thickness of the circumferential side wall is Hx, wherein Hs > Hx.

6. The electric machine of claim 4, wherein, The reinforcing portion comprises: a plurality of first reinforcing ribs, adjacent first reinforcing ribs being perpendicular to each other.

7. The electric machine of claim 6, wherein, The reinforcing portion further comprises: a plurality of second reinforcing ribs, one second reinforcing rib being arranged between adjacent first reinforcing ribs.

8. The motor according to claim 7, wherein: an included angle between the second reinforcing rib and the first reinforcing rib ranges from greater than or equal to 15 degrees to less than or equal to 40 degrees.

9. The motor according to claim 2, wherein: in the axial direction of the rotating shaft, a length of the circumferential side wall and the main body is H2, and a distance between an end surface of the main body facing the rotor assembly and an end surface of the rotor assembly facing the main body is t, wherein a = H2 - t, and t < 0.5 mm.

10. The electric machine of claim 1 or 2, wherein, The motor further comprises: a spacer arranged on the rotating shaft and located on a side of the end cover away from the rotor assembly. A pulley is arranged on the rotating shaft and located on the side of the spacer away from the rotor assembly.

11. The electric machine of claim 1 or 2, wherein, The rotor assembly comprises: A rotor core, at least one end of the rotor core is provided with a clearance groove.

12. The motor according to claim 1 or 2, characterized in that, A third mounting hole is arranged on the first mounting portion and extends along the axial direction of the rotating shaft.

13. The electric machine of claim 1 or 2, wherein, Further comprising: A connecting piece, the stator assembly and the end cover are connected through the connecting piece. 14.A laundry treating apparatus, characterized by, Including: A fixing portion; The motor according to any one of claims 1 to 13, wherein the stator assembly of the motor is placed on the fixing portion, and the first mounting portion of the motor is connected with the fixing portion.

Images