Pump and electrical product

Abstract

The embodiment of the invention provides a pump and an electrical product, and the pump comprises a motor which comprises a rotor shaft; the impeller comprises a containing part used for being connected with the rotor shaft; the rotor shaft is connected with the containing part through a buckle structure so that the motor and the impeller can be connected and fixed. Therefore, the impeller of the pump is connected with the rotor shaft of the motor through the buckle structure, the whole assembly process is simplified, and the connection reliability is improved.

Description

Technical Field

[0001] The present application relates to the field of electromechanical engineering, and in particular to a pump and an electrical appliance. Background Art

[0002] Motors are widely used in various electromechanical devices, including household appliances (such as dishwashers, washing machines, and dryers), office automation equipment, industrial equipment, and transportation equipment. For example, motors are used in various pumps. For example, a motor installed in a pump for cleaning equipment is called a cleaning pump or a washing pump. Motors also include brushless DC motors, brushless permanent magnet motors, and permanent magnet synchronous motors.

[0003] Typically, a motor consists of a motor body and a housing mounted on it. The motor body typically includes components such as a stator and a rotor. In a cleaning pump, the motor's rotor shaft is fixedly connected to the impeller. The motor outputs torque to the impeller through the rotor shaft, driving the impeller and the liquid in turn.

[0004] It should be noted that the above introduction to the technical background is merely intended to provide a clear and complete description of the technical solutions of this application and facilitate understanding by those skilled in the art. Simply because these solutions are described in the background technology section of this application, it should not be assumed that the above technical solutions are well known to those skilled in the art. Summary of the Invention

[0005] At present, an existing technology for connecting the rotor shaft and impeller of a motor is to use a threaded assembly connection, that is, an external thread is set on one of the rotor shaft and the impeller, and a corresponding internal thread is set on the other. The impeller and the rotor shaft are assembled into one by the thread to increase the impeller tightening torque to prevent the impeller from falling out.

[0006] Another existing technology for connecting the rotor shaft of a motor with an impeller is to knurl the rotor shaft, and press the knurled shaft into the inner hole of the impeller hub by external force, so that the impeller and the motor shaft are assembled together.

[0007] The inventors found that in the existing technology using threaded pair assembly connection, the internal thread needs to be processed through a mold, which is a complicated process; when the motor is reversed or stopped, the impeller will disengage from the motor shaft under the inertia of the water flow, which may easily cause the pump to malfunction; and this connection method increases the torque of the threaded pair and cannot effectively prevent the impeller from disengaging, and it is easy to damage the strength of the impeller. When the pump is in a hot water medium, the plastic impeller may also be deformed by heat.

[0008] In the existing technology of knurling on the rotor shaft, the pump assembly process is complicated. It is necessary to first assemble the motor rotor assembly and the pump bearing flange assembly together, and then assemble the impeller to the motor shaft by press-fitting. The assembled rotor and impeller assembly is then installed in the pump body. The pump head requires special features or parts to press the bearing flange to prevent the suction force during pump operation from causing the rotor and impeller assembly to disengage, resulting in the pump not working properly; and the assembly pressing force is large, which can easily cause damage to the impeller.

[0009] In response to at least one of the above problems or other similar problems, embodiments of the present application provide a pump and an electrical product.

[0010] According to a first aspect of an embodiment of the present application, a pump is provided, comprising:

[0011] an electric motor comprising a rotor shaft;

[0012] an impeller comprising a receiving portion for connection to the rotor shaft;

[0013] The rotor shaft is connected to the accommodating portion via a snap-fit ​​structure to connect and fix the motor to the impeller.

[0014] In some embodiments, the buckle structure includes:

[0015] at least one elastic portion, which is provided on the rotor shaft or the accommodation portion;

[0016] The elastic portion deforms along the radial direction of the rotor shaft during assembly of the rotor shaft of the motor and the impeller, and applies elastic force to the joint surface thereof after assembly is completed, so as to fix the motor and the impeller in the axial direction of the rotor shaft.

[0017] In some embodiments, the elastic portion is an elastic beam, the main body of the elastic beam is suspended in the air, and the direction of the elastic beam is consistent with the axial direction of the pump.

[0018] In some embodiments, the elastic beam is a cantilever beam, one end of the cantilever beam is connected to the rotor shaft or the accommodating portion, and the other end is suspended in the air.

[0019] In some embodiments, the buckle structure further includes:

[0020] a protrusion provided on one of the rotor shaft side and the accommodation portion side;

[0021] a mating portion provided on the other of the rotor shaft side and the accommodating portion side;

[0022] Furthermore, one of the protruding portion and the matching portion is provided on the elastic portion;

[0023] The protruding portion is engaged with the matching portion to fix the motor and the impeller in the axial direction.

[0024] In some embodiments, the protrusion is a bump, and the bump includes:

[0025] an insertion slope, which forms a first angle with the axial direction of the rotor shaft, so as to facilitate the insertion of the rotor shaft into the receiving portion;

[0026] The engaging surface forms a second included angle with the axial direction of the rotor shaft and is in contact and engaged with the matching portion to fix the motor and the impeller in the axial direction.

[0027] In some embodiments, the protrusion is an annular ridge, and the matching portion is an annular groove.

[0028] In some embodiments, the buckle structure includes:

[0029] a first circumferential limiting portion, which is provided on the rotor shaft;

[0030] a second circumferential limiting portion, which is provided on the accommodating portion;

[0031] The first circumferential limiting portion cooperates with the second circumferential limiting portion to fix the motor and the impeller in the circumferential direction of the rotor shaft.

[0032] In some embodiments, the shape of the rotor shaft matches the shape of the receiving portion.

[0033] According to a second aspect of the embodiments of the present application, an electrical product is provided, comprising the pump according to the first aspect of the embodiments of the present application.

[0034] One beneficial effect of the embodiments of the present application is that the impeller and the rotor shaft of the motor are assembled using a snap-fit ​​structure, which reduces the assembly force of the motor and the impeller, reduces the impact on the various components of the pump, and improves the assembly quality and stability; and simplifies the assembly process of the motor and the impeller, so that the impeller can be assembled after the rotor, flange and other parts of the motor are assembled; and the internal thread of the impeller inner hole is eliminated, which simplifies the mold structure and improves the stability of the impeller injection molding process and the product quality; in addition, the snap-fit ​​structure parts are convenient for disassembly and repair.

[0035] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The included drawings are used to provide a further understanding of the embodiments of the present application, which constitute a part of the specification, are used to illustrate the implementation methods of the present application, and together with the text description, explain the principles of the present application. Obviously, the drawings described below are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive work. In the drawings:

[0037] Figure 1 is a top view of a pump according to an embodiment of the present application;

[0038] Figure 2 is a cross-sectional view of a pump according to an embodiment of the present application;

[0039] Figure 3 is a schematic diagram of an embodiment of the present application showing a connection between a rotor shaft and an impeller;

[0040] Figure 4 yes Figure 3 A schematic diagram of the rotor shaft of the motor shown;

[0041] Figure 5 is with Figure 4 A schematic diagram of the receiving portion of the rotor shaft shown;

[0042] Figure 6 is a schematic diagram of another embodiment of the connection between the rotor shaft and the impeller in the embodiment of the present application;

[0043] Figure 7 yes Figure 6 Another schematic diagram of the housing of the impeller shown;

[0044] Figure 8 is with Figure 7 A schematic diagram of a rotor shaft with a matching receiving portion shown;

[0045] Figure 9 is another schematic diagram of the rotor shaft of the motor according to an embodiment of the present application;

[0046] Figure 10 is with Figure 9 Another schematic diagram of the receiving portion of the rotor shaft is shown;

[0047] Figure 11 is another schematic diagram of the rotor shaft of the motor according to an embodiment of the present application;

[0048] Figure 12 is a schematic diagram of another embodiment of the connection between the rotor shaft and the impeller in the embodiment of the present application;

[0049] Figure 13 is another schematic diagram of the accommodating portion of the impeller according to an embodiment of the present application;

[0050] Figure 14 is with Figure 13 A schematic diagram of a rotor shaft with a matching receiving portion shown;

[0051] Figure 15 yes Figure 13 The housing shown is Figure 14 A schematic diagram of the rotor shaft assembly is shown;

[0052] Figure 16 is a schematic diagram of another embodiment of the connection between the rotor shaft and the impeller in the embodiment of the present application;

[0053] Figure 17 yes Figure 16 Another schematic diagram of the rotor shaft of the motor shown;

[0054] Figure 18 is with Figure 17 A schematic diagram of a rotor shaft-fitting receptacle is shown. DETAILED DESCRIPTION

[0055] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0056] In the embodiments of the present application, the terms "first", "second", "upper", "lower", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or time order of these elements, etc. These elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0057] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0058] In addition, in the following description of the present application, for the convenience of explanation, the central axis OO' of the rotor shaft or the direction parallel to it is referred to as "axial" or "axial extension direction" or "axial direction of the pump" or "axial extension direction of the pump", the radial direction centered on the axis OO' is referred to as "radial", the side away from the central axis OO' in the radial direction is referred to as "radial outer side", the side close to the central axis OO' in the radial direction is referred to as "radial inner side", and the direction around the axis OO' is referred to as "circumferential", but this is only for the convenience of explanation and does not limit the orientation of the stator and motor during use and manufacturing.

[0059] The following describes the embodiments of the present application in conjunction with the accompanying drawings. These embodiments are merely exemplary and are not intended to limit the embodiments of the present application.

[0060] Embodiments of the first aspect

[0061] The embodiment of the present application provides a pump, Figure 1 is a top view of the pump according to an embodiment of the present application, Figure 2 It is a cross-sectional view of the pump according to an embodiment of the present application.

[0062] like Figure 1 and Figure 2 As shown, the pump 100 includes a motor 10 and an impeller 20 .

[0063] In some embodiments, the pump 100 may be, for example, a cleaning pump or a washing pump, or may also be a pump used in other scenarios, which may be selected based on actual needs, and the present application is not limited thereto.

[0064] In some embodiments, the motor 10 includes a stator assembly (also known as a stator assembly) and a rotor assembly. In other embodiments, the motor 10 also includes a motor control board. In addition, the motor 10 may also include other components, such as bearings. In other embodiments, the stator assembly includes a stator core, an insulating portion provided on the outer periphery of the stator core, and a coil wound around the stator core provided with the insulating portion. The stator core typically includes a plurality of stacked stator punchings, for example, the stator core includes silicon steel laminations. In other embodiments, the rotor assembly includes a rotor shaft and other structures. For the specific structure of the motor 10, please refer to the relevant prior art, and the description is omitted here.

[0065] In the embodiments of this application, Figure 1 and Figure 2 As shown, the rotor shaft 101 of the motor 10 is connected to the receiving portion 201 of the impeller 20 via a snap-fit ​​structure to securely connect the motor 10 to the impeller 20. The receiving portion 201 of the impeller 20 is, for example, an inner hole of the impeller hub.

[0066] Thus, the connection between the impeller and the rotor shaft of the motor is achieved through the snap-fit ​​structure, which reduces the assembly force of the motor and the impeller, reduces the impact on the various components of the pump, and improves the assembly quality and stability; and simplifies the assembly process of the motor and the impeller, and the impeller can be assembled after the rotor, flange and other parts of the motor are assembled; and the internal thread of the impeller inner hole is eliminated, which simplifies the mold structure and improves the stability of the impeller injection molding process and product quality; in addition, the snap-fit ​​structure parts are convenient for disassembly and repair.

[0067] Figure 3 Schematic diagram of an embodiment of the present application in which the rotor and the impeller are connected. Figure 3 As shown, the rotor shaft 101 of the motor 10 is inserted into the receiving portion 201 of the impeller 20 and fixed by a snap-fit ​​structure.

[0068] In some embodiments, the snap-fit ​​structure includes an axial positioning portion that fixes the motor 10 and the impeller 20 together in the axial direction.

[0069] In some embodiments, the axial positioning portion includes at least one elastic portion disposed on the rotor shaft or the receiving portion.

[0070] In some embodiments, the elastic portion is disposed on the rotor shaft.

[0071] Figure 4 yes Figure 3 The schematic diagram of the rotor shaft of the motor is shown as Figure 4 As shown, the elastic portion 301 is provided in the axial extension direction of the rotor shaft 101. When subjected to a force, the elastic portion 301 can deform radially inward of the rotor shaft 101, and when the force disappears, the elastic portion 301 returns to its original shape. Figure 5 is with Figure 4 A schematic diagram of the receiving portion of the rotor shaft shown, as shown Figure 5 As shown, the housing 201 is the inner hole of the impeller hub and is a cylindrical circular hole. The diameter of the rotor shaft 101 is equal to the inner diameter of the housing 201. This prevents the rotor shaft from moving radially within the housing 201, thereby securing the motor and impeller together in the radial direction. Furthermore, after the elastic portion 301 is deformed, its size can be reduced to a size less than or equal to the diameter of the rotor shaft. Thus, the rotor shaft 101 and the elastic portion 301 can be inserted into the housing 201.

[0072] When the size of the elastic part before deformation is larger than the inner diameter of the accommodating part 201, during the assembly process of the motor 10 and the impeller 20, the elastic part 301 is deformed along the radial inner side of the rotor shaft 101 and its size is reduced to less than or equal to the inner diameter of the accommodating part 201. After the assembly is completed, the elastic part 301 applies elastic force to the joint surface between it and the accommodating part 201 to achieve the fastening of the motor 10 and the impeller 20 in the axial and circumferential directions.

[0073] In some embodiments, the elastic portion is disposed in the receiving portion.

[0074] Figure 6 Schematic diagram of another embodiment of the connection between the rotor shaft and the impeller in the embodiment of the present application. Figure 7 yes Figure 6 Another schematic diagram of the housing of the impeller shown in FIG. Figure 6 and Figure 7 As shown, the housing 201 is a cylindrical circular hole in the impeller hub. The elastic portion 301 is provided in the axial direction of the impeller housing 201. When subjected to a force, the elastic portion 301 can deform radially outward from the rotor shaft 101. When the force is removed, the elastic portion 301 returns to its original shape. Figure 8 is with Figure 7 A schematic diagram of the rotor shaft with the receiving portion shown, as shown Figure 8 As shown, the diameter of the rotor shaft 101 is equal to the inner diameter of the housing 201, thereby preventing the rotor shaft from shaking in the housing 201 and radially securing the motor and impeller together. Furthermore, before deformation, the elastic portion 301 can be smaller than or equal to the diameter of the rotor shaft 101. After deformation, the elastic portion 301 can expand to a size larger than the diameter of the rotor shaft. This allows the rotor shaft 101 to be inserted into the elastic portion 301 and, subsequently, into the housing 201.

[0075] When the size of the elastic part before deformation is smaller than the diameter of the rotor shaft 101, during the assembly process of the motor 10 and the impeller 20, the elastic part 301 is deformed along the radial outside and the size expands to be equal to the inner diameter of the accommodating part 201. After the assembly is completed, the elastic part 301 applies elastic force to the joint surface between it and the accommodating part 201 to achieve the fastening of the motor 10 and the impeller 20 in the axial and circumferential directions.

[0076] In some embodiments, the elastic portion includes an elastic beam, the direction of the elastic beam is consistent with the axial direction of the pump, and the main body of the elastic beam is suspended, for example, Figure 4 As shown, the main body or middle section of the elastic beam 301 is suspended. One of the two ends of the elastic beam 301 is suspended, for example Figure 4 As shown; or both ends of the elastic beam 301 are not suspended, such as the following Figure 9 shown.

[0077] In some embodiments, the number of the elastic beam is at least one. In the embodiment of the present application, two elastic beams are used as an example for illustration, but the present application is not limited thereto.

[0078] In some embodiments, the elastic beam is a cantilever beam. For example, see Figure 4 One end of the elastic beam 301 is connected to the rotor shaft 101, and the other end is suspended in the air.

[0079] In some embodiments, the elastic beam may not be a cantilever beam. For example, Figure 9 is another schematic diagram of the rotor shaft of the motor according to an embodiment of the present application, as shown in FIG. Figure 9 As shown, the elastic portion includes two elastic beams 301. The main bodies or middle sections of the two elastic beams 301 are suspended in the air. The first ends of the two elastic beams 301 are respectively connected to the rotor shaft 101, and the second ends of the two elastic beams 301 are connected to each other. In this case, the size of the portion where the second ends of the two elastic beams 301 are connected is less than or equal to the inner diameter of the accommodating portion 201. The radial size of the main bodies or middle sections of the two elastic beams 301 can be greater than or equal to the inner diameter of the accommodating portion 201.

[0080] When the main body or middle section of the two elastic beams 301 is larger in radial direction than the inner diameter of the accommodating portion 201, during the assembly process of the motor 10 and the impeller 20, the two elastic beams 301 are deformed along the radial inner side of the rotor shaft 101 and the size is reduced to less than or equal to the inner diameter of the accommodating portion 201. After the assembly is completed, the elastic portion 301 applies elastic force to the joint surface between it and the accommodating portion 201 to achieve the fastening of the motor 10 and the impeller 20 in the axial and circumferential directions.

[0081] In some embodiments, the axial positioning portion further includes a protruding portion and a fitting portion.

[0082] The protruding portion is provided on one side of the rotor shaft or the accommodating portion, and the mating portion is provided on the other side of the rotor shaft or the accommodating portion, and one of the protruding portion and the mating portion is provided on the elastic portion. That is, when the elastic portion is provided on the rotor shaft, the protruding portion is provided on the elastic portion on the rotor shaft side, and the mating portion is provided on the accommodating portion side, or the protruding portion is provided on the accommodating portion side, and the mating portion is provided on the elastic portion on the rotor shaft side; when the elastic portion is provided on the accommodating portion, the protruding portion is provided on the rotor shaft side, and the mating portion is provided on the elastic portion on the accommodating portion side, or the protruding portion is provided on the elastic portion on the accommodating portion side, and the mating portion is provided on the rotor shaft side.

[0083] The protrusion and the matching portion match each other in shape and position. When the motor and the impeller are assembled, the protrusion and the matching portion engage with each other to fix the motor and the impeller in the axial direction to prevent the impeller from falling off the rotor shaft.

[0084] In some embodiments, the protruding portion is disposed on the rotor shaft side, and the matching portion is disposed on the accommodating portion side.

[0085] For example, Figure 4 and Figure 5 As shown, the protrusion 302 is provided on the rotor shaft 101 side, and, due to Figure 4The elastic portion 301 in the embodiment is also provided on the rotor shaft 101. Therefore, the protrusion 302 is provided on the elastic portion 301 connected to the rotor shaft 101. The protrusion 302 is higher than the surface of the elastic portion 301 on the radially outer side. Correspondingly, the mating portion 303 is provided on the accommodating portion 201. The mating portion 303 is lower than the inner surface of the accommodating portion 201 on the radially outer side, forming a space for engagement with the protrusion 302. The position and shape of the mating portion 303 match those of the protrusion 302.

[0086] Therefore, during the assembly process of the motor 10 and the impeller 20, the elastic portion 301 is deformed radially inwardly by the force exerted on the rotor shaft 101, causing the elastic portion 301 and the protrusion 302 to shrink in size until they can fit into the accommodating portion 201. Subsequently, the elastic portion 301, the protrusion 302, and the rotor shaft 101 are inserted into the accommodating portion. When the protrusion 302 moves to the position of the mating portion 303, because the mating portion 303 is radially lower than the inner surface of the accommodating portion 201, the elastic force of the elastic portion 301 causes the protrusion 302 to expand radially outwardly, thereby engaging with the mating portion 303. This secures the motor 10 and the impeller 20 in the axial direction.

[0087] In some embodiments, the protrusion is arranged at different positions on the rotor shaft side, and accordingly, the position of the matching portion on the accommodating portion side adapts to the different positions of the protrusion on the rotor shaft side, so that when the rotor shaft is assembled to the accommodating portion, the protrusion just engages with the matching portion.

[0088] In some embodiments, the protruding portion is disposed at an end of the elastic portion away from the rotor shaft, and correspondingly, the matching portion is disposed at an end of the accommodating portion away from the motor.

[0089] For example, in Figure 4 In the rotor shaft 101 shown in FIG. 1 , the protrusion 302 is provided at the end of the elastic portion 301 on the rotor shaft side away from the rotor shaft 101 , that is, the top end of the elastic portion 301 . Figure 5 In the housing portion 201 shown, the matching portion 303 is provided at the end of the housing portion 201 away from the motor 10. Figure 4 The rotor shaft 101 is shown with Figure 5 During the assembly of the receiving portion 201 shown in FIG, the elastic portion 301 is deformed radially inward by the force, and its size is reduced until the protrusion 302 enters the receiving portion 201; when it reaches the appropriate position, the elastic portion 301 expands radially outward under the action of the elastic force, so that the protrusion 302 is engaged with the matching portion 303, and the assembly is completed as shown in FIG. Figure 3 shown.

[0090] In some embodiments, the protruding portion is disposed in the middle section of the elastic portion, and correspondingly, the matching portion is disposed in the middle section of the accommodating portion.

[0091] For example, in Figure 9 In the rotor shaft 101 shown, the protrusion 302 is provided at the middle section of the elastic portion 301 on the rotor shaft side. Figure 10 is with Figure 9 Another schematic diagram of the receiving portion of the rotor shaft shown, as shown Figure 10 As shown, the mating portion 303 is provided on the mating portion 201 and is concave inwardly toward the inner surface of the mating portion 201 along the radial outer side to form a space for accommodating the protrusion 302. Figure 9 The rotor shaft 101 is shown with Figure 10 During the assembly process of the matching portion 201 shown, the elastic portion 301 is deformed radially inward by the force, and its size is reduced until the protrusion 302 enters the accommodating portion 201; when it reaches the appropriate position, the elastic portion 301 expands radially outward under the action of the elastic force, so that the protrusion 302 and the matching portion 303 are engaged, and the assembly is completed.

[0092] In some embodiments, the protrusions may be configured to have different shapes, and accordingly, the shapes of the matching portions may vary with the shapes of the protrusions.

[0093] In some embodiments, the protrusion is a bump.

[0094] For example, in Figure 4 and Figure 9 In the illustrated rotor shaft, the protrusion 302 is a bump.

[0095] In some embodiments, the bump includes:

[0096] an insertion slope, which forms a first angle with the axial direction of the rotor shaft, so as to facilitate the insertion of the rotor shaft into the receiving portion;

[0097] The engaging surface forms a second included angle with the axial direction of the rotor shaft and is in contact and engaged with the matching portion to fix the motor and the impeller in the axial direction.

[0098] by Figure 4 Taking the protrusion 302 provided on the side of the rotor shaft 101 as an example, the insertion inclined surface 3021 of the protrusion 302 forms a first angle θ1 with the axis OO', and the engagement surface 3022 of the protrusion 302 forms a second angle θ2 with the axis OO'. Figure 3 When the rotor shaft 101 is inserted into the accommodating portion 201, the rotor shaft 101 can be easily inserted into the accommodating portion 201 due to the setting of the insertion inclined surface 3021; ​​when the rotor shaft 101 is engaged with the accommodating portion 201, the engaging surface 3022 of the protruding portion 302 contacts and engages with the matching portion 303, preventing the rotor shaft 101 from falling out of the accommodating portion 201, thereby fixing the motor and the impeller in the axial direction.

[0099] Therefore, by providing the insertion inclined surface on the protrusion, the assembly of the rotor shaft and the accommodating portion is facilitated; at the same time, by providing the engaging surface on the protrusion, the stability of the connection between the motor and the impeller can be improved.

[0100] In some embodiments, the first angle θ1 has a value range of, for example, 5 degrees to 60 degrees, and the second angle θ2 has a value range of, for example, greater than 45 degrees.

[0101] In some embodiments, the insertion bevel faces the assembly direction. Figure 4 In the embodiment, when the protrusion 302 is disposed on the rotor shaft 101, the insertion bevel faces the assembly direction, that is, the direction away from the rotor shaft 101. Therefore, during the assembly of the rotor shaft and the receiving portion, the insertion bevel first contacts the receiving portion, making it easier for the protruding rotor shaft to be inserted into the receiving portion, thereby facilitating assembly.

[0102] For another example, Figure 13 This is another schematic diagram of the housing portion of the impeller of the embodiment of the present application. Figure 13 In the embodiment, protrusion 302 is disposed within receiving portion 201. When protrusion 302 is disposed within receiving portion 201, the insertion bevel faces the assembly direction, that is, away from the receiving portion. Therefore, during assembly of the rotor shaft and the receiving portion, the insertion bevel first contacts the rotor shaft, making it easier to insert the rotor shaft into the receiving portion and facilitating assembly.

[0103] In some embodiments, the protrusion is an arm-like structure.

[0104] Figure 11 is another schematic diagram of the rotor shaft of the motor according to an embodiment of the present application, as shown in FIG. Figure 11 As shown, the protrusion 302 is an arm provided on the elastic portion 301. Figure 11 The process of assembling the rotor shaft and the corresponding receiving portion is similar to Figure 4 The rotor shaft and Figure 5 The process of assembling the receiving part or Figure 9 The rotor shaft shown is Figure 10 The process of assembling the receiving portion shown is similar and will not be repeated here.

[0105] In some embodiments, the protrusion 302 of the arm-shaped structure is an elastic arm, which deforms radially inward when subjected to force.

[0106] For example, Figure 11 The housing shown can be used with Figure 10 The rotor shaft shown is assembled, Figure 12 This is a schematic diagram of another embodiment of the connection between the rotor shaft and the impeller of the present application. During the assembly process, Figure 11At least one of the elastic portion 301 and the protruding portion 302 is deformed radially inward by the force, so that the elastic portion 301 and the protruding portion 302 are contracted to be able to enter the accommodating portion 201; when reaching the appropriate position, the elastic portion 301 and the protruding portion 302 are expanded radially outward under the action of the elastic force, so that the protruding portion 302 is engaged with the matching portion 303, and the assembly is completed. The state of the completed assembly is shown in FIG. Figure 12 shown.

[0107] In some embodiments, the protrusion may also be in other shapes, for example, the protrusion is Figure 6 or Figure 8 The annular ridge shown, correspondingly, the mating portion is Figure 7 Annular groove shown.

[0108] like Figures 6 to 8 As shown, the protrusion 302 is provided on the rotor shaft 101 side, and correspondingly, the matching portion 303 is provided on the accommodating portion 201 side. Furthermore, since the elastic portion 301 is provided in the accommodating portion 201, the matching portion 303 is provided on the elastic portion 301 connected to the accommodating portion 201. The matching portion 303 is recessed radially outward on the inner surface of the elastic portion 301 to form a space for engagement with the protrusion 302. The position and shape of the matching portion 303 match those of the protrusion 302.

[0109] Therefore, during the assembly process of the motor 10 and the impeller 20, the elastic portion 301 is deformed radially outwardly by the force exerted on the rotor shaft 101, expanding its size to allow the rotor shaft 101 and the protrusion 302 to enter the accommodating portion 201. The rotor shaft 101 and the protrusion 302 are then inserted into the accommodating portion 201. When the protrusion 302 moves to the position of the mating portion 303, the mating portion 303 is lower than the inner surface of the elastic portion 301 on the radial outward side. Therefore, the elastic portion 301 contracts radially inwardly under the action of the elastic force, thereby engaging the mating portion 303 with the protrusion 302. In this way, the motor 10 and the impeller 20 are secured in the axial direction.

[0110] In some embodiments, the protrusion is arranged on the receiving portion side, and the matching portion is arranged on the rotor shaft side.

[0111] In this embodiment, the contents related to the protruding portion and the fitting portion are described above and will not be repeated here.

[0112] For example, Figure 4 The protrusion 302 is provided at Figure 5 The accommodating portion 201 is disposed in the accommodating portion 201 and protrudes radially inward from the inner surface of the accommodating portion 201; accordingly, Figure 5 The matching portion 303 is provided in Figure 4The outer surface of the elastic portion 301 is recessed radially inward to form a space for engagement with the protrusion 302 on the receiving portion 201. During assembly of the rotor shaft and the receiving portion, the elastic portion is deformed radially inward by force to insert into the receiving portion. As the elastic portion and the rotor shaft move within the receiving portion, the elastic portion contacts the protrusion within the receiving portion and is further deformed radially inward by force. When the elastic portion reaches the desired position, the elastic portion expands radially outward under the action of the elastic force, allowing the protrusion within the receiving portion to engage with the mating portion on the elastic portion, thereby securing the motor and impeller together in the axial direction.

[0113] For example, Figure 9 The protrusion 302 is provided at Figure 7 The accommodating portion 201 is disposed in the accommodating portion 201 and protrudes radially inward from the inner surface of the accommodating portion 201; accordingly, Figure 10 The matching portion 303 is provided in Figure 9 The outer surface of the elastic portion 301 is recessed inwardly along the radial inner side to form a space for engagement with the protrusion 302 on the receiving portion 201. The assembly process is as described in the previous example and will not be repeated here.

[0114] For example, Figure 11 The protrusion 302 is provided at Figure 10 The accommodating portion 201 is disposed in the accommodating portion 201 and protrudes radially inward from the inner surface of the accommodating portion 201; accordingly, Figure 10 The matching portion 303 is provided in Figure 11 The outer surface of the elastic portion 301 is recessed inwardly along the radial inner side to form a space for engagement with the protrusion 302 on the receiving portion 201. The assembly process is as described in the previous example and will not be repeated here.

[0115] For another example, Figure 13 is another schematic diagram of the accommodating portion of the impeller of an embodiment of the present application, Figure 14 is with Figure 13 A schematic diagram of the rotor shaft with the receiving portion shown, Figure 15 yes Figure 13 The housing shown is Figure 14 Schematic diagram of the rotor shaft assembly shown in FIG. Figures 13 to 15 As shown, the protrusion 302 is provided on the side of the receiving portion 201. Since the elastic portion 301 is provided on the receiving portion 201, the protrusion 302 is provided on the elastic portion 301 connected to the receiving portion 201. The protrusion 302 protrudes radially inward from the inner surface of the elastic portion 301. Correspondingly, the mating portion 303 is provided on the side of the rotor shaft 101. The mating portion 303 is recessed radially inward on the surface of the rotor shaft 101 to form a space for engagement with the protrusion 302. The position and shape of the mating portion 303 match those of the protrusion 302.

[0116] Therefore, during the assembly process of the motor 10 and the impeller 20, the elastic portion 301 is deformed radially outward by force, and its size expands to allow the rotor shaft 101 to pass through the protrusion 302 and enter the accommodation portion 201; then the rotor shaft 101 is inserted into the accommodation portion 201; when the matching portion 303 moves to the position of the protrusion 302, since the matching portion 303 is lower than the inner surface of the rotor shaft 101, the elastic portion 301 contracts radially inward under the action of the elastic force, thereby engaging the matching portion 303 with the protrusion 302. The schematic diagram of the completed assembly is shown in FIG. Figure 15 As shown, the motor 10 and the impeller 20 are fastened to each other in the axial direction.

[0117] In some embodiments, the protrusion and the matching portion are arranged in pairs, and the number thereof is at least one pair. In the embodiments of the present application, a pair of protrusions and matching portions is used as an example, but the present application is not limited thereto.

[0118] In some embodiments, the snap-fit ​​structure further includes a circumferential positioning portion for fixing the motor 10 and the impeller 20 together in the circumferential direction.

[0119] In some embodiments, the circumferential positioning portion includes:

[0120] a first circumferential limiting portion, which is provided on the rotor shaft;

[0121] a second circumferential limiting portion, which is provided on the accommodating portion;

[0122] The first circumferential limiting portion cooperates with the second circumferential limiting portion to fix the motor and the impeller in the circumferential direction of the rotor shaft.

[0123] For example, Figure 4 As shown, the first circumferential limiting portion 401 is a groove provided between the elastic portions 301. Figure 5 As shown, the second circumferential limiting portion 402 is a filling block provided in the receiving portion 201, and the filling block matches the shape of the groove and can be filled into the groove. Figure 3 In the assembled state of the rotor shaft 101 and the accommodating portion 201 shown, the groove 401 engages with the filling block 402 to prevent the rotor shaft 101 from rotating in the accommodating portion 201 , thereby fixing the electrode and the impeller together in the circumferential direction.

[0124] For example, Figure 8 、 Figure 9 、 Figure 11 as well as Figure 14 As shown, the first circumferential limit portion 401 is a plane or curved surface formed by cutting the shaft material of the rotor shaft 101, wherein the cross section of the rotor shaft 101 after the shaft material is cut is not circular; accordingly, as shown Figure 10 and Figure 13As shown, the second circumferential limiting portion 402 is a protrusion formed by filling the accommodating portion 201 with material. The position, size, and shape of the protrusion formed by filling are respectively the same as the size, position, and shape of the reduced shaft material. Therefore, after the rotor shaft 101 is inserted into the accommodating portion 201, the plane or curved surface formed by reducing the shaft material of the rotor shaft 101 can fit with the surface of the protrusion filled and formed in the accommodating portion 201, so that the rotor shaft 101 cannot rotate in the accommodating portion 201, thereby fixing the electrode and the impeller together in the circumferential direction.

[0125] For another example, Figure 16 Schematic diagram of another embodiment of the connection between the rotor shaft and the impeller in the embodiment of the present application. Figure 17 yes Figure 16 Another schematic diagram of the rotor shaft of the motor shown is Figure 16 and Figure 17 As shown, the first circumferential limit portion 401 is a knurling provided on the shaft body of the rotor shaft 101; accordingly, Figure 18 is with Figure 17 A schematic diagram of the receiving portion of the rotor shaft shown, as shown Figure 18 As shown, the second circumferential limit portion 402 is a spline provided on the accommodating portion 201. The position, size and shape of the spline are respectively the same as the size, position and shape of the knurling on the shaft body of the rotor shaft 101. Therefore, after the rotor shaft 101 is inserted into the accommodating portion 201, the knurling of the rotor shaft 101 engages with the spline of the fusion-anbut 201, so that the rotor shaft 101 cannot rotate in the accommodating portion 201, thereby fixing the electrode and the impeller together in the circumferential direction.

[0126] Therefore, the circumferential positioning portion can prevent the rotor shaft from rotating in the circumferential direction after being engaged with the accommodating portion, thereby fixing the motor and the impeller together in the circumferential direction.

[0127] It should be noted that the above embodiments are only some examples of the circumferential positioning portion provided in this application, but this application is not limited thereto.

[0128] In some embodiments, the shape of the rotor shaft matches the shape of the receiving portion.

[0129] For example, the rotor shaft is a cylindrical shaft, and accordingly, the receiving portion is a cylindrical hole of the impeller hub.

[0130] For another example, the rotor shaft is a conical shaft, and correspondingly, the accommodating portion is a conical surface of the impeller hub.

[0131] Thus, the shape of the rotor shaft matches the shape of the accommodating portion, preventing the rotor shaft from moving radially after being engaged with the accommodating portion, thereby fixing the motor and the impeller together in the radial direction.

[0132] In some embodiments, the shaft end of the rotor shaft is provided with an introduction fillet or chamfer to facilitate the insertion of the rotor shaft into the receiving portion. Figure 4 The setting of the insertion slope 3021 of the middle protrusion 302 is equivalent to the introduction fillet or chamfer of the shaft end of the rotor shaft. Figure 8 、 Figure 14 and Figure 17 The shaft end of the rotor shaft is provided with a lead-in fillet or chamfer.

[0133] Through the above embodiment, the rotor shaft and impeller of the pump are assembled using a snap-fit ​​structure, which reduces the assembly force between the motor and the impeller, reduces the impact on the various components of the pump, and improves the assembly quality and stability; and simplifies the assembly process of the motor and the impeller. The impeller can be assembled after the rotor, flange and other parts of the motor are assembled; and the internal thread of the impeller inner hole is eliminated, which simplifies the mold structure and improves the stability of the impeller injection molding process and product quality; in addition, the snap-fit ​​structure parts are convenient for disassembly and repair. At the same time, the present application realizes the reliable positioning of the impeller on the rotor shaft in the axial, circumferential and radial directions through the snap-fit ​​structure, ensuring that the motor outputs torque to the impeller through the rotor shaft, driving the impeller to rotate and drive the liquid to rotate, which is conducive to increasing the energy of the liquid.

[0134] Embodiments of the second aspect

[0135] The embodiment of the second aspect of the present application provides an electrical product having the pump 100 as described in the embodiment of the first aspect. Since the structure of the pump 100 has been described in detail in the embodiment of the first aspect, it will not be repeated here.

[0136] In the embodiments of the present application, the electrical products may be various household appliances (such as dishwashers, washing machines, dryers, etc.), office automation equipment, industrial equipment, transportation equipment, etc., for example, Figure 1 As shown, the electrical product may be a device including a pump 100 .

[0137] It can be seen from the above embodiments that the rotor shaft and impeller of the pump are assembled using a snap-fit ​​structure, which reduces the assembly force between the motor and the impeller, reduces the impact on the various components of the pump, and improves the assembly quality and stability; and simplifies the assembly process of the motor and the impeller, and the impeller can be assembled after the rotor, flange and other parts of the motor are assembled; and the internal thread of the impeller inner hole is eliminated, which simplifies the mold structure and improves the stability of the impeller injection molding process and the product quality; in addition, the snap-fit ​​structure parts are convenient for disassembly and repair.

[0138] The embodiments of the present application are described above in conjunction with specific implementation methods, but those skilled in the art should be aware that these descriptions are exemplary and do not limit the scope of protection of the embodiments of the present application. Those skilled in the art can make various variations and modifications to the embodiments of the present application based on the spirit and principles of the embodiments of the present application, and these variations and modifications are also within the scope of the embodiments of the present application.

[0139] The preferred embodiments of the present invention have been described above with reference to the accompanying drawings. Many features and advantages of these embodiments are apparent from this detailed description, and the appended claims are intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. Furthermore, since many modifications and variations will readily occur to those skilled in the art, the embodiments of the present invention are not intended to be limited to the precise structure and operation illustrated and described, but are intended to encompass all suitable modifications and equivalents that fall within their scope.

Claims

1. A pump, comprising: an electric motor comprising a rotor shaft; an impeller comprising a receiving portion for connection to the rotor shaft; It is characterized by: The rotor shaft is connected to the accommodating portion via a snap-fit ​​structure to connect and fix the motor to the impeller.

2. The pump according to claim 1, characterized in that The buckle structure includes: at least one elastic portion, which is provided on the rotor shaft or the accommodation portion; The elastic portion deforms along the radial direction of the rotor shaft during assembly of the rotor shaft of the motor and the impeller, and applies elastic force to the joint surface thereof after assembly is completed, so as to fix the motor and the impeller in the axial direction of the rotor shaft.

3. The pump according to claim 2, characterized in that The elastic part is an elastic beam, the main body of the elastic beam is suspended in the air, and the direction of the elastic beam is consistent with the axial direction of the pump.

4. The pump according to claim 3, characterized in that The elastic beam is a cantilever beam, one end of which is connected to the rotor shaft or the accommodating portion, and the other end of which is suspended in the air.

5. The pump according to claim 2, characterized in that The buckle structure further includes: a protrusion provided on one of the rotor shaft side and the accommodation portion side; a mating portion provided on the other of the rotor shaft side and the accommodating portion side; Furthermore, one of the protruding portion and the matching portion is provided on the elastic portion; The protruding portion is engaged with the matching portion to fix the motor and the impeller in the axial direction.

6. The pump according to claim 5, characterized in that The protrusion is a bump, and the bump includes: an insertion slope, which forms a first angle with the axial direction of the rotor shaft, so as to facilitate the insertion of the rotor shaft into the receiving portion; The engaging surface forms a second included angle with the axial direction of the rotor shaft and is in contact and engaged with the matching portion to fix the motor and the impeller in the axial direction.

7. The pump according to claim 5, characterized in that The protruding portion is an annular ridge, and the matching portion is an annular groove.

8. The pump according to claim 1, wherein The buckle structure includes: a first circumferential limiting portion, which is provided on the rotor shaft; a second circumferential limiting portion, which is provided on the accommodating portion; The first circumferential limiting portion cooperates with the second circumferential limiting portion to fix the motor and the impeller in the circumferential direction of the rotor shaft.

9. The pump according to claim 1, wherein The shape of the rotor shaft matches the shape of the accommodation portion.

10. An electrical product, characterized in that: The electrical product comprises the pump according to any one of claims 1 to 9.

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