Motor and household appliance

Abstract

The utility model provides a motor and a household electrical appliance. The motor comprises a stator assembly; the end cover can be installed at the end of the stator assembly, one of the end cover and the stator assembly is provided with a sealing groove, the other one of the end cover and the stator assembly is provided with a sealing boss, under the condition that the end cover is connected with the end of the stator assembly, the sealing boss extends into the sealing groove, and the sealing boss and the sealing groove are arranged around the axis of the stator assembly; wherein the first wall surface of the sealing groove is in interference fit with the second wall surface of the sealing boss, the length of a connecting line passing through the axis in a connecting line of any two points on the first wall surface is L1, the length of a connecting line passing through the axis in a connecting line of any two points on the second wall surface is L2, the absolute value of the difference between L1 and L2 is the magnitude of interference, and the magnitude of interference is larger than or equal to 0.05 mm and smaller than or equal to 0.5 mm. According to the motor provided by the utility model, the first wall surface and the second wall surface are in interference fit, and the magnitude of interference is between 0.05 mm and 0.5 mm, so that the waterproof performance is ensured, and cracking can be avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, and in particular to a motor and a household appliance. Background Art

[0002] At present, as the application scenarios of products such as household appliances equipped with motors become more and more extensive, the diversity of motor application environments is also increasing.

[0003] In the related art, water may enter the motor when it is exposed to rain, which may easily cause the motor performance to deteriorate or even fail to work normally. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art or related technology.

[0005] To this end, a first aspect of the utility model provides a motor.

[0006] The second aspect of the utility model also provides a household appliance.

[0007] In view of this, the first aspect of the utility model proposes a motor, comprising: a stator assembly; an end cover, the end cover can be installed at the end of the stator assembly, one of the end cover and the stator assembly is provided with a sealing groove, and the other is provided with a sealing boss, when the end cover is connected to the end of the stator assembly, the sealing boss extends into the sealing groove, and the sealing boss and the sealing groove are both arranged around the axis of the stator assembly; wherein, the first wall surface of the sealing groove and the second wall surface of the sealing boss are interference fit, the length of the line connecting any two points on the first wall surface passing through the axis is L1, the length of the line connecting any two points on the second wall surface passing through the axis is L2, the absolute value of the difference between L1 and L2 is the interference amount, and the interference amount is greater than or equal to 0.05 mm and less than or equal to 0.5 mm.

[0008] The motor provided by the utility model includes a stator assembly and an end cover, and the end cover can be installed at the end of the stator assembly to shield components such as the stator and the rotor. One of the end cover and the stator assembly is provided with a sealing groove, and the other is provided with a sealing boss. When the end cover is installed at the end of the stator assembly, the sealing boss cooperates with the sealing groove to achieve the connection between the end cover and the stator assembly, and the first wall surface of the sealing groove and the second wall surface of the sealing boss are interference-fitted, so that a sealing structure is formed between the first wall surface and the second wall surface, thereby preventing water leakage at the connection between the sealing boss and the sealing groove. At the same time, the sealing boss and the sealing groove are both arranged around the axis of the stator assembly, so that the sealing boss and the sealing groove are sealed along the circumference of the stator assembly, thereby improving the waterproof effect. Among them, among the lines connecting any two points on the first wall surface, the length of the line passing through the axis of the stator assembly is L1, and among the lines connecting any two points on the second wall surface, the length of the line passing through the axis of the stator assembly is L2. The absolute value of the difference between L1 and L2 is the interference amount of the interference fit between the first wall surface and the second wall surface. If the interference amount between the first wall surface and the second wall surface is too large, it will cause cracking when the first wall surface and the second wall surface are matched. If the interference amount between the first wall surface and the second wall surface is too small, the sealing effect between the first wall surface and the second wall surface will be reduced. Therefore, setting the interference amount between 0.05mm and 0.5mm can not only ensure the waterproof performance between the first wall surface and the second wall surface, but also avoid the occurrence of cracking between the first wall surface and the second wall surface.

[0009] The motor provided by the utility model may also have the following additional technical features:

[0010] In some embodiments, optionally, along the radial direction of the stator assembly, the sealing groove includes a first wall surface close to the axis and a third wall surface away from the axis, and the sealing boss includes a second wall surface close to the axis and a fourth wall surface away from the axis; the third wall surface and the fourth wall surface are interference fit or clearance fit.

[0011] In this embodiment, along the radial direction of the stator assembly, the first wall surface of the sealing groove close to the axis and the second wall surface of the sealing boss close to the axis are interference-fitted, that is, the inner side of the matching position of the sealing groove and the sealing boss is interference-fitted, which can effectively achieve a waterproof effect. The third wall surface of the sealing groove away from the axis and the fourth wall surface of the sealing boss away from the axis are interference-fitted or clearance-fitted. In the case of interference-fitting between the third wall surface and the fourth wall surface, a sealing structure is formed between the third wall surface and the fourth wall surface, that is, at least two levels of sealing are formed between the sealing boss and the sealing groove, thereby improving the waterproof effect between the sealing boss and the sealing groove; in the case of clearance-fitting between the third wall surface and the fourth wall surface, the installation between the sealing boss and the sealing groove is more labor-saving, thereby improving the installation efficiency.

[0012] In some embodiments, optionally, when the third wall surface and the fourth wall surface have an interference fit, the difference between the diameter of the circle enclosed by the fourth wall surface and the diameter of the circle enclosed by the third wall surface is greater than or equal to 0.01 mm and less than or equal to 0.5 mm; when the third wall surface and the fourth wall surface have a clearance fit, the diameter of the circle enclosed by the fourth wall surface is less than or equal to the diameter of the circle enclosed by the third wall surface.

[0013] In this embodiment, in the case of interference fit between the third wall and the fourth wall: if the interference amount of the interference fit between the third wall and the fourth wall is too large, the third wall and the fourth wall will be easily cracked when installed; if the interference amount of the interference fit between the third wall and the fourth wall is too small, the sealing effect between the third wall and the fourth wall will be poor. Therefore, the difference between the diameter of the circle surrounded by the fourth wall and the diameter of the circle surrounded by the third wall is set to 0.01mm to 0.5mm, which can not only ensure a good sealing effect between the third wall and the fourth wall, but also avoid cracking when the third wall and the fourth wall are interference fit. In the case of clearance fit between the third wall and the fourth wall, the diameter of the circle surrounded by the fourth wall is less than or equal to the diameter of the circle surrounded by the third wall, which can improve the convenience of installation between the sealing boss and the sealing groove.

[0014] In some embodiments, optionally, the number of sealing bosses is one or more, and the number of sealing grooves is the same as the number of sealing bosses; wherein, when the number of sealing bosses is multiple, the multiple sealing bosses are arranged in multiple circles along the radial direction of the stator assembly, and the multiple sealing bosses correspond one-to-one with the multiple sealing grooves.

[0015] In this embodiment, the number of sealing bosses is one or more. When the number of sealing bosses is multiple, the number of sealing grooves is also multiple, wherein the multiple sealing bosses are arranged in multiple circles along the radial direction of the stator assembly, and then with the cooperation of the multiple sealing grooves, multiple circles of waterproofing along the radial direction are achieved, further improving the waterproofing effect.

[0016] In some embodiments, optionally, along the axial direction of the stator assembly, the depth of the sealing groove is greater than or equal to the height of the sealing boss.

[0017] In this embodiment, along the axial direction of the stator assembly, the depth of the sealing groove is greater than or equal to the height of the sealing boss, so that the sealing boss can be fully inserted into the sealing groove, so that the end cover can fit with the stator assembly to avoid a gap between the two, thereby preventing water leakage from the gap.

[0018] In some embodiments, optionally, the difference between the depth of the sealing groove and the height of the sealing boss is greater than or equal to 0.3 mm.

[0019] In this embodiment, the difference between the depth of the sealing groove and the height of the sealing boss is greater than or equal to 0.3 mm, so that the sealing boss can be fully extended into the sealing boss, thereby ensuring the sealing performance between the two.

[0020] In some embodiments, optionally, the interference between the first wall surface and the second wall surface is greater than or equal to 0.05 mm and less than or equal to 0.2 mm.

[0021] In this embodiment, the interference between the first wall surface and the second wall surface is set between 0.05 mm and 0.2 mm, which can not only ensure the bonding force between the first wall surface and the second wall surface, so that a sealing structure is formed between the first wall surface and the second wall surface, but also avoid cracking between the sealing boss and the sealing groove due to excessive interference.

[0022] In some embodiments, optionally, the motor further includes: a sealing member disposed between the bottom wall of the sealing groove and the top wall of the sealing boss.

[0023] In this embodiment, a sealing member is provided between the bottom wall of the sealing groove and the top wall of the sealing boss, so as to prevent water from entering through this position.

[0024] In some embodiments, optionally, one of the stator assembly and the end cover is provided with a limiting boss, and the other is provided with a limiting groove, and when the end cover is connected to the stator assembly, the limiting boss is connected to the limiting groove.

[0025] In this embodiment, the stator assembly and the end cover are pre-positioned by means of the limiting boss and the limiting groove, thereby improving the convenience of connection between the stator assembly and the end cover.

[0026] According to a second aspect of the present invention, a household appliance is also provided, comprising: a motor as provided in any of the above embodiments.

[0027] The household appliance provided in the second aspect of the utility model comprises the motor proposed by any of the above technical solutions and therefore has all the beneficial effects of the motor.

[0028] Additional aspects and advantages of the present invention will become apparent in the following description or will be understood through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0030] Figure 1 A schematic diagram showing the structure of a motor according to an embodiment of the utility model is shown;

[0031] Figure 2 Shows Figure 1 An enlarged schematic diagram of point A of the motor of the illustrated embodiment;

[0032] Figure 3 One of the structural schematic diagrams of a stator assembly of an embodiment of the utility model is shown;

[0033] Figure 4 One of the structural schematic diagrams of the end cover of one embodiment of the utility model is shown;

[0034] Figure 5 A second structural schematic diagram of a stator assembly according to an embodiment of the utility model is shown;

[0035] Figure 6 A second structural schematic diagram of an end cover according to an embodiment of the utility model is shown;

[0036] Figure 7 A schematic structural diagram of a motor according to an embodiment of the utility model is shown.

[0037] in, Figures 1 to 7 The corresponding relationship between the reference numerals and the component names is as follows:

[0038] 100 motor, 1 stator assembly, 10 sealing boss, 12 second wall, 14 fourth wall, 16 limiting boss, 2 end cover, 20 sealing groove, 22 first wall, 24 third wall, 26 limiting groove, 3 sealing member. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. 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.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0041] Refer to the following Figures 1 to 7 The following describes a motor 100 and a household appliance according to some embodiments of the present invention.

[0042] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, according to an embodiment of the present utility model, the present utility model provides a motor 100 including: a stator assembly 1 and an end cover 2 .

[0043] Specifically, the end cover 2 can be installed at the end of the stator assembly 1, one of the end cover 2 and the stator assembly 1 is provided with a sealing groove 20, and the other is provided with a sealing boss 10. When the end cover 2 is connected to the end of the stator assembly 1, the sealing boss 10 extends into the sealing groove 20, and the sealing boss 10 and the sealing groove 20 are both arranged around the axis of the stator assembly 1.

[0044] Among them, the first wall 22 of the sealing groove 20 and the second wall 12 of the sealing boss 10 are interference fit, the length of the line connecting any two points on the first wall 22 passing through the axis is L1, the length of the line connecting any two points on the second wall 12 passing through the axis is L2, the absolute value of the difference between L1 and L2 is the interference, and the interference is greater than or equal to 0.05mm and less than or equal to 0.5mm.

[0045] The motor 100 provided by the utility model comprises a stator assembly 1 and an end cover 2, and the end cover 2 can be installed at the end of the stator assembly 1 to shield components such as the stator and the rotor. One of the end cover 2 and the stator assembly 1 is provided with a sealing groove 20, and the other is provided with a sealing boss 10. When the end cover 2 is installed at the end of the stator assembly 1, the sealing boss 10 cooperates with the sealing groove 20 to achieve the connection between the end cover 2 and the stator assembly 1, and the first wall surface 22 of the sealing groove 20 and the second wall surface 12 of the sealing boss 10 are interference-fitted, so that a sealing structure is formed between the first wall surface 22 and the second wall surface 12, thereby preventing water leakage from the connection between the sealing boss 10 and the sealing groove 20. At the same time, the sealing boss 10 and the sealing groove 20 are both arranged around the axis of the stator assembly 1, so that the sealing boss 10 and the sealing groove 20 are sealed along the circumference of the stator assembly 1, thereby improving the waterproof effect. Among them, among the lines connecting any two points on the first wall surface 22, the length of the line connecting the axis of the stator assembly 1 is L1, and among the lines connecting any two points on the second wall surface 12, the length of the line connecting the axis of the stator assembly 1 is L2. The absolute value of the difference between L1 and L2 is the interference amount of the interference fit between the first wall surface 22 and the second wall surface 12. If the interference amount between the first wall surface 22 and the second wall surface 12 is too large, it will cause cracking when the first wall surface 22 and the second wall surface 12 are matched. If the interference amount between the first wall surface 22 and the second wall surface 12 is too small, the sealing effect between the first wall surface 22 and the second wall surface 12 will be reduced. Therefore, setting the interference amount between 0.05mm and 0.5mm can not only ensure the waterproof performance between the first wall surface 22 and the second wall surface 12, but also avoid the occurrence of cracking between the first wall surface 22 and the second wall surface 12.

[0046] Optionally, the sealing boss 10 and the sealing groove 20 may both be an annular structure, an annular-like structure, an elliptical structure, or the like.

[0047] In a specific application, when the sealing boss 10 and the sealing groove 20 are both annular structures, L1 is the diameter of the first wall surface 22 , and L2 is the diameter of the second wall surface 12 .

[0048] It should be noted that one of the sealing boss 10 and the sealing groove 20 provided on the stator assembly 1 is located at one end of the stator assembly 1 along the axial direction, and the other provided on the end cover 2 is located on the side of the end cover 2 facing the stator assembly 1 .

[0049] like Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, optionally, along the radial direction of the stator assembly 1, the sealing groove 20 includes a first wall 22 close to the axis and a third wall 24 away from the axis, and the sealing boss 10 includes a second wall 12 close to the axis and a fourth wall 14 away from the axis; the third wall 24 and the fourth wall 14 are interference fit or clearance fit.

[0050] In this embodiment, along the radial direction of the stator assembly 1, the first wall surface 22 of the sealing groove 20 close to the axis is interference-fitted with the second wall surface 12 of the sealing boss 10 close to the axis, that is, the inner side of the matching position of the sealing groove 20 and the sealing boss 10 is interference-fitted, which can effectively achieve a waterproof effect. The third wall surface 24 of the sealing groove 20 away from the axis is interference-fitted or clearance-fitted with the fourth wall surface 14 of the sealing boss 10 away from the axis. When the third wall surface 24 and the fourth wall surface 14 are interference-fitted, a sealing structure is formed between the third wall surface 24 and the fourth wall surface 14, that is, at least two levels of sealing are formed between the sealing boss 10 and the sealing groove 20, thereby improving the waterproof effect between the sealing boss 10 and the sealing groove 20; when the third wall surface 24 and the fourth wall surface 14 are clearance-fitted, the installation between the sealing boss 10 and the sealing groove 20 is more labor-saving, thereby improving the installation efficiency.

[0051] It can be understood that the interference fit between the first wall surface 22 and the second wall surface 12 can be an interference fit between the first wall surface 22 and the second wall surface 12 in the axial direction of the stator assembly 1, or can be an interference fit between the first wall surface 22 and the second wall surface 12 in a portion of the axial direction of the stator assembly 1.

[0052] In some embodiments, optionally, when the third wall 24 and the fourth wall 14 have an interference fit, the difference between the diameter of the circle enclosed by the fourth wall 14 and the diameter of the circle enclosed by the third wall 24 is greater than or equal to 0.01 mm and less than or equal to 0.5 mm; when the third wall 24 and the fourth wall 14 have a clearance fit, the diameter of the circle enclosed by the fourth wall 14 is less than or equal to the diameter of the circle enclosed by the third wall 24.

[0053] like Figure 3 and Figure 4As shown, in this embodiment, when the third wall 24 and the fourth wall 14 have an interference fit: if the interference amount of the interference fit between the third wall 24 and the fourth wall 14 is too large, the third wall 24 and the fourth wall 14 will be easily cracked during installation; if the interference amount of the interference fit between the third wall 24 and the fourth wall 14 is too small, the sealing effect between the third wall 24 and the fourth wall 14 will be poor. Therefore, the difference between the diameter d2 of the circle enclosed by the fourth wall 14 and the diameter d1 of the circle enclosed by the third wall 24 is set to 0.01mm to 0.5mm, which can not only ensure a good sealing effect between the third wall 24 and the fourth wall 14, but also avoid the occurrence of cracking when the third wall 24 and the fourth wall 14 have an interference fit. When the third wall surface 24 and the fourth wall surface 14 are loosely matched, the diameter d2 of the circle formed by the fourth wall surface 14 is less than or equal to the diameter d1 of the circle formed by the third wall surface 24 , which can improve the installation convenience between the sealing boss 10 and the sealing groove 20 .

[0054] In a specific application, when the third wall 24 and the fourth wall 14 have an interference fit, the difference between the diameter of the circle enclosed by the fourth wall 14 and the diameter of the circle enclosed by the third wall 24 is any value among 0.02mm, 0.03mm, 0.04mm, 0.05mm, 0.06mm, 0.07mm, 0.1mm, 0.12mm, 0.14mm, 0.16mm, 0.18mm, 0.2mm, 0.25mm, 0.3mm, 0.4mm, and 0.5mm.

[0055] Optionally, the sealing boss 10 is provided on the stator assembly 1 , the sealing groove 20 is provided on the end cover 2 , and both the sealing boss 10 and the end cover 2 are injection molded parts.

[0056] Optionally, the stator assembly 1 includes a stator and a shell arranged on the outside and end of the stator assembly 1, and the sealing boss 10 is arranged on the shell.

[0057] Optionally, the housing is an injection molded part.

[0058] Optionally, the end cover 2 is an injection molded part.

[0059] In some embodiments, optionally, along the axial direction, the first wall surface 22 includes a first part and a second part connected in sequence, the first part is connected to the bottom wall of the sealing groove 20, and the second wall surface 12 includes a third part and a fourth part connected in sequence, and the third part is connected to the top wall of the sealing boss 10; when the end cover 2 is connected to the stator assembly 1, the bottom wall of the sealing groove 20 and the top wall of the sealing boss 10 are arranged opposite to each other, the first part and the third part are interference fit, and the second part and the fourth part are clearance fit or interference fit.

[0060] In this embodiment, along the axial direction of the stator assembly 1, the first wall surface 22 of the sealing groove 20 includes a first part and a second part connected in sequence, and the second wall surface 12 of the sealing boss 10 includes a third part and a fourth part connected in sequence, wherein the first part of the first wall surface 22 is connected to the bottom wall of the sealing groove 20, and the third part of the second wall surface 12 is connected to the top wall of the sealing boss 10. When the end cover 2 is installed at the end of the stator assembly 1, the bottom wall of the sealing groove 20 and the top wall of the sealing boss 10 are arranged opposite to each other, and the first part and the third part are interference fit, so that the first wall surface 22 and the second wall surface 12 form a sealing structure to play a waterproof role. When the second part and the fourth part are clearance fit, it is convenient to insert the sealing boss 10 into the sealing groove 20; when the second part and the fourth part are interference fit, the first wall surface 22 and the second wall surface 12 are all interference fit, thereby improving the sealing effect.

[0061] Optionally, along the axial direction of the stator assembly 1 , the bottom wall of the sealing groove 20 is in contact with the top wall of the sealing boss 10 or has a gap therebetween.

[0062] Optionally, when the second part and the fourth part are clearance-fitted, the fourth part is gradually inclined toward the axis from the end connected to the third part to the end away from the third part to play a guiding role; or the third part and the fourth part are in a step structure.

[0063] In some embodiments, optionally, the number of sealing bosses 10 is one or more, and the number of sealing grooves 20 is the same as the number of sealing bosses 10; wherein, when the number of sealing bosses 10 is multiple, the multiple sealing bosses 10 are arranged in multiple circles along the radial direction of the stator assembly 1, and the multiple sealing bosses 10 correspond one-to-one with the multiple sealing grooves 20.

[0064] In this embodiment, the number of the sealing bosses 10 is one or more. When the number of the sealing bosses 10 is multiple, the number of the sealing grooves 20 is also multiple, wherein the multiple sealing bosses 10 are arranged in multiple circles along the radial direction of the stator assembly 1, and then with the cooperation of the multiple sealing grooves 20, multiple circles of waterproofing along the radial direction are achieved, further improving the waterproofing effect.

[0065] like Figure 1 and Figure 2 As shown, in some embodiments, optionally, along the axial direction of the stator assembly 1 , the depth h1 of the sealing groove 20 is greater than or equal to the height h2 of the sealing boss 10 .

[0066] In this embodiment, along the axial direction of the stator assembly 1, the depth h1 of the sealing groove 20 is greater than or equal to the height h2 of the sealing boss 10, so that the sealing boss 10 can be completely inserted into the sealing groove 20, so that the end cover 2 can fit with the stator assembly 1 to avoid a gap between the two, thereby avoiding water leakage from the gap.

[0067] In some embodiments, optionally, the difference between the depth h1 of the sealing groove 20 and the height h2 of the sealing boss 10 is greater than or equal to 0.3 mm.

[0068] In this embodiment, the difference between the depth h1 of the sealing groove 20 and the height h2 of the sealing boss 10 is greater than or equal to 0.3 mm, so that the sealing boss 10 can be fully extended into the sealing boss 10, thereby ensuring the sealing performance between the two.

[0069] Optionally, the difference between the depth h1 of the sealing groove 20 and the height h2 of the sealing boss 10 is greater than or equal to 0.3 mm and less than or equal to 5 mm.

[0070] Optionally, the difference between the depth h1 of the sealing groove 20 and the height h2 of the sealing boss 10 is greater than or equal to 0.3 mm and less than or equal to 2 mm.

[0071] In some embodiments, optionally, the interference between the first wall surface 22 and the second wall surface 12 is greater than or equal to 0.05 mm and less than or equal to 0.2 mm.

[0072] In this embodiment, the interference between the first wall 22 and the second wall 12 is set between 0.05 mm and 0.2 mm, which can not only ensure the bonding force between the first wall 22 and the second wall 12, so that a sealing structure is formed between the first wall 22 and the second wall 12, but also avoid the occurrence of cracks between the sealing boss 10 and the sealing groove 20 due to excessive interference.

[0073] In specific applications, the interference between the first wall 22 and the second wall 12 is any value among 0.05mm, 0.06mm, 0.07mm, 0.08mm, 0.09mm, 0.1mm, 0.11mm, 0.12mm, 0.13mm, 0.14mm, 0.15mm, 0.16mm, 0.17mm, 0.18mm, 0.19mm, and 0.2mm.

[0074] like Figure 7 As shown, in some embodiments, optionally, the motor 100 further includes: a sealing member 3 disposed between the bottom wall of the sealing groove 20 and the top wall of the sealing boss 10 .

[0075] In this embodiment, a sealing member 3 is provided between the bottom wall of the sealing groove 20 and the top wall of the sealing boss 10 to prevent water from entering from this position.

[0076] Optionally, the sealing member 3 comprises an elastic member.

[0077] Optionally, the sealing member 3 includes a rubber member or a silicone member.

[0078] like Figure 5 and Figure 6 As shown, in some embodiments, optionally, one of the stator assembly 1 and the end cover 2 is provided with a limiting boss 16, and the other is provided with a limiting groove 26, and when the end cover 2 is connected to the stator assembly 1, the limiting boss 16 is connected to the limiting groove 26.

[0079] In this embodiment, the stator assembly 1 and the end cover 2 are pre-positioned by the limiting boss 16 and the limiting groove 26 , thereby improving the convenience of connection between the stator assembly 1 and the end cover 2 .

[0080] Optionally, the sealing boss 10 and the limiting boss 16 are arranged on the stator assembly 1, and the sealing groove 20 and the limiting groove 26 are arranged on the end cover 2. The limiting boss 16 is located on the side of the sealing boss 10 close to the axis of the stator assembly 1, and the limiting groove 26 is located on the side of the sealing groove 20 close to the axis of the stator assembly 1.

[0081] Optionally, the motor 100 also includes a connecting piece, a first connecting hole is provided on the limiting boss 16, a second connecting hole is provided on the bottom wall of the limiting groove 26, and the second connecting hole passes through the end cover 2 along the axial direction of the stator assembly 1, and the connecting piece is passed through the first connecting hole and the second connecting hole to fix the end cover 2 to the stator assembly 1.

[0082] Optionally, the connecting member comprises a screw or a bolt.

[0083] Optionally, at least a portion of the limiting boss 16 and the limiting groove 26 on a side close to the axis of the stator assembly 1 is interference fit to achieve waterproofing.

[0084] According to an embodiment of the present invention, a household appliance is also provided, comprising: a motor 100 as provided in any of the above embodiments.

[0085] The household appliance provided by the present invention comprises the motor 100 provided in any of the above embodiments, and therefore has all the beneficial effects of the motor 100.

[0086] It should be noted that household appliances include but are not limited to: washing machines, vacuum cleaners, air conditioners, fans, etc.

[0087] In a specific application, a sealing groove 20 is provided on the end cover 2, and a sealing boss 10 is provided on the stator assembly 1. The outer side surface of the sealing boss 10 (for example, the fourth wall surface 14) and the outer side surface of the sealing groove 20 (for example, the third wall surface 24) are a clearance or interference fit, and the inner side surface of the sealing boss 10 (for example, the second wall surface 12) and the inner side surface of the sealing groove 20 (for example, the first wall surface 22) are an interference fit, and the interference amount is 0.05mm-0.20mm.

[0088] Optionally, the height of the sealing boss 10 is h2, and the depth of the sealing groove 20 is h1, wherein h1-h2≥0.3 mm.

[0089] Optionally, the diameter of the outer side surface of the sealing boss 10 is d2, and the diameter of the outer side surface of the sealing groove 20 is d1, wherein d2≤d1 or d2-d1≥0.01 mm.

[0090] Optionally, the inner surface diameter of the sealing boss 10 is L2, the inner surface diameter of the sealing groove 20 is L1, and the interference g1=L1-L2, wherein 0.05mm≤g1≤0.20mm.

[0091] The motor 100 mainly includes: a BMC (bulk molding compound) end cover (such as the end cover 2), a stator assembly 1, a sealing boss 10, and a sealing groove 20. The BMC end cover and the stator assembly 1 are both formed by an injection molding process. During the assembly process of the end cover 2 and the stator assembly 1, the sealing boss 10 enters the sealing groove 20, and the outer side surface of the sealing boss 10 forms an interference or clearance fit with the outer side surface of the sealing groove 20, and the inner side surface of the sealing boss 10 forms an interference fit with the inner side surface of the sealing groove 20, and the interference amount is 0.05mm-0.20mm. The interference amount is set based on: when the interference amount is less than 0.05mm, the bonding force between the end cover 2 and the stator assembly 1 is too small and does not meet the use requirements. When the interference amount is greater than 0.20mm, the bonding force between the end cover 2 and the stator assembly 1 is too large, and there is a risk of cracking.

[0092] In the present invention, the term "plurality" means two or more than two, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0093] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation 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.

[0094] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A motor, characterized in that: include: stator assembly; An end cover, the end cover can be installed at the end of the stator assembly, one of the end cover and the stator assembly is provided with a sealing groove, and the other is provided with a sealing boss, when the end cover is connected to the end of the stator assembly, the sealing boss extends into the sealing groove, and the sealing boss and the sealing groove are both arranged around the axis of the stator assembly; Among them, the first wall surface of the sealing groove and the second wall surface of the sealing boss are interference fit, the length of the line connecting any two points on the first wall surface passing through the axis is L1, the length of the line connecting any two points on the second wall surface passing through the axis is L2, the absolute value of the difference between L1 and L2 is the interference amount, and the interference amount is greater than or equal to 0.05mm and less than or equal to 0.5mm.

2. The motor according to claim 1, characterized in that Along the radial direction of the stator assembly, the sealing groove includes the first wall surface close to the axis and the third wall surface away from the axis, and the sealing boss includes the second wall surface close to the axis and the fourth wall surface away from the axis; The third wall surface and the fourth wall surface are interference fit or clearance fit.

3. The motor according to claim 2, characterized in that In the case where the third wall surface and the fourth wall surface are interference fit, the difference between the diameter of the circle enclosed by the fourth wall surface and the diameter of the circle enclosed by the third wall surface is greater than or equal to 0.01 mm and less than or equal to 0.5 mm; When the third wall surface and the fourth wall surface are loosely matched, the diameter of the circle enclosed by the fourth wall surface is less than or equal to the diameter of the circle enclosed by the third wall surface.

4. The motor according to any one of claims 1 to 3, characterized in that The number of the sealing bosses is one or more, and the number of the sealing grooves is the same as the number of the sealing bosses; Wherein, in the case that there are multiple sealing bosses, the multiple sealing bosses are arranged in multiple circles along the radial direction of the stator assembly, and the multiple sealing bosses are matched with the multiple sealing grooves in a one-to-one correspondence.

5. The electric machine according to any one of claims 1 to 3, characterized in that Along the axial direction of the stator assembly, the depth of the sealing groove is greater than or equal to the height of the sealing boss.

6. The motor according to claim 5, characterized in that The difference between the depth of the sealing groove and the height of the sealing boss is greater than or equal to 0.3 mm.

7. The electric machine according to any one of claims 1 to 3, characterized in that The interference between the first wall surface and the second wall surface is greater than or equal to 0.05 mm and less than or equal to 0.2 mm.

8. The motor according to claim 7, characterized in that Also includes: The sealing member is arranged between the bottom wall of the sealing groove and the top wall of the sealing boss.

9. The electric machine according to any one of claims 1 to 3, characterized in that One of the stator assembly and the end cover is provided with a limiting boss, and the other is provided with a limiting groove. When the end cover is connected to the stator assembly, the limiting boss is connected to the limiting groove.

10. A household appliance, characterized in that: include: A motor as claimed in any one of claims 1 to 9.

Images