Rotor assembly, motor and electrical equipment

Abstract

The invention discloses a rotor assembly, a motor and electrical equipment, and the rotor assembly comprises a connecting piece which is provided with a plurality of connecting structures, and the plurality of connecting structures are sequentially arranged at intervals in the circumferential direction of the connecting piece; the rotor core comprises a plurality of iron core units, the plurality of iron core units are sequentially arranged at intervals around the connecting piece, and the connecting structure is connected with the iron core units and is suitable for positioning the connecting piece and the iron core units in the radial direction. Therefore, the connecting pieces are connected with the iron core units, the radial force is provided for the iron core units through the connecting structures, when the rotor iron core rotates at a high speed, the connecting structures can prevent the iron core units from generating radial displacement due to centrifugal force, the rotation reliability of the rotor iron core is improved, and the structural strength of the rotor iron core can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a rotor assembly, a motor and an electrical device. Background Art

[0002] Brushless DC motors usually use an integrated rotor structure. There is a magnetic isolation bridge inside the integrated rotor structure. The magnetic isolation bridge will cause magnetic leakage problems inside the rotor, resulting in low utilization of permanent magnets and reduced motor performance.

[0003] In the related art, the magnetic leakage problem is solved by arranging the rotor core in blocks. However, arranging the rotor core in blocks results in low structural strength of the rotor core, which cannot meet the requirements of high-speed operation. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a rotor assembly with high structural strength.

[0005] A rotor assembly comprises: a connecting member, the connecting member is provided with a plurality of connecting structures, the plurality of connecting structures are arranged in sequence and at intervals in the circumferential direction of the connecting member; a rotor core, the rotor core comprises a plurality of core units, the plurality of core units are arranged in sequence and at intervals around the connecting member, the connecting structure is connected to the core unit, and is suitable for positioning the connecting member and the core unit in the radial direction.

[0006] According to the rotor assembly of the present invention, the rotor assembly is connected to the core unit through a connecting piece, and a radial force is provided to the core unit through a connecting structure. When the rotor core rotates at a high speed, the connecting structure can prevent the core unit from generating radial displacement due to centrifugal force, thereby improving the rotation reliability of the rotor core and improving the structural strength of the rotor core.

[0007] According to some embodiments of the present invention, the core unit is provided with a positioning groove, which extends outward from the inner end of the core unit along the radial direction; the connecting member includes a connecting member body, and the connecting structure extends outward from the outer peripheral wall of the connecting member body along the radial direction and is suitable for positioning and cooperating with the positioning groove.

[0008] According to some embodiments of the present invention, the connection structure includes: an extension portion, which extends in a radial direction and whose inner end is connected to the connector body; a positioning portion, which is arranged on the extension portion and is used to position and cooperate with the positioning groove; wherein a radial force point is formed between the positioning portion and the wall surface of the positioning groove.

[0009] According to some embodiments of the present invention, the positioning portion is disposed at an outer end of the extending portion.

[0010] According to some embodiments of the present invention, the core unit is provided with a positioning protrusion, which extends inward from the inner end of the core unit along the radial direction; the connecting member includes a connecting member body, and the connecting structure is constructed as an installation groove, which extends inward from the outer peripheral wall of the connecting member body along the radial direction and is suitable for positioning and cooperating with the positioning protrusion.

[0011] According to some embodiments of the present invention, the rotor assembly further includes a plurality of magnetic components, and a receiving groove is formed between any two adjacently arranged core units, and the magnetic component is disposed in the receiving groove.

[0012] According to some embodiments of the present invention, the number of the magnetic members is an even number.

[0013] According to some embodiments of the present invention, the connecting member and the rotor core are integrally formed by plastic encapsulation.

[0014] According to some embodiments of the present invention, the connecting member is provided with a plurality of first through holes which are arranged through the connecting member in an axial direction, and the plurality of first through holes are evenly spaced and arranged around the connecting member.

[0015] According to some embodiments of the present invention, the core unit is provided with a second through hole extending through the core unit in the axial direction.

[0016] According to some embodiments of the present invention, the connector is suitable for being injection molded by overmolding.

[0017] According to some embodiments of the present invention, the tensile strength of the connecting member is higher than the tensile strength of the encapsulating material.

[0018] According to some embodiments of the present invention, the rotor assembly further includes a rotating shaft, and the connecting member is sleeved on the rotating shaft and fixedly connected to the rotating shaft.

[0019] Another object of the present invention is to provide a motor.

[0020] A motor comprises the above-mentioned rotor assembly.

[0021] The motor has the same advantages as the above-mentioned rotor assembly, which will not be described in detail here.

[0022] Another object of the present invention is to provide an electrical device.

[0023] An electrical device comprises the above-mentioned motor.

[0024] The advantages of the electrical equipment are the same as those of the motor, which will not be elaborated here.

[0025] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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:

[0027] Figure 1 is a schematic structural diagram of a rotor assembly according to an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the cooperation between the connecting piece and the core unit according to an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of the coordination of the stator core, the connector and the core unit according to an embodiment of the present invention;

[0030] Figure 4 A schematic structural diagram of an iron core unit according to an embodiment of the present invention;

[0031] Figure 5 A schematic diagram of the structure of a connecting piece according to an embodiment of the present invention;

[0032] Figure 6 A schematic structural diagram of an iron core unit according to another embodiment of the present invention;

[0033] Figure 7 A schematic structural diagram of a connecting member according to another embodiment of the present invention;

[0034] Figure 8 It is a schematic structural diagram of the stator core according to an embodiment of the present invention.

[0035] Reference numerals:

[0036] The rotor assembly 100, the connector 10, the connecting structure 11, the extension portion 111, the positioning portion 112, the connector body 12, the first through hole 13, the stop protrusion 14,

[0037] The rotor core 20, the core unit 21, the positioning groove 211, the positioning protrusion 212, the second through hole 213, the radial limiting portion 214, the buckle point 215,

[0038] The magnetic member 30 , the rotating shaft 50 , the plastic coating 51 , the stator core 200 , the core monomer 210 , the first portion 211 , and the second portion 212 . DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] The following content should be integrated into the writing process as needed to explain the relevant content:

[0041] In the description of the present invention, it is necessary to understand that the orientations or positional relationships indicated by the terms “inner”, “outer”, “axial”, “radial”, “circumferential”, etc. are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0042] In the description of the present invention, "plurality" means two or more.

[0043] Reference below Figure 1-Figure 8 A rotor assembly 100 according to an embodiment of the present invention is described.

[0044] Combination Figure 2 and Figure 4 According to the present invention, the rotor assembly 100 includes: a connector 10 and a rotor core 20, the connector 10 is provided with a plurality of connection structures 11, the plurality of connection structures 11 are arranged in sequence and at intervals in the circumferential direction of the connector 10, the rotor core 20 includes a plurality of core units 21, the plurality of core units 21 are arranged in sequence and at intervals around the connector 10, the connection structure 11 is connected to the core unit 21, and is suitable for positioning the connector 10 and the core unit 21 in the radial direction.

[0045] Specifically, multiple core units 21 are arranged in a circular shape and are disposed around the connecting member 10, the connecting structure 11 is disposed opposite to the core units 21, and the connecting structure 11 extends in a radial direction so that the connecting structure 11 is connected to the core units 21, so that the connecting member 10 can connect multiple core units 21, and through the connecting structure 11, the core units 21 can be positioned and matched with the connecting member 10 in the radial direction, and the connecting structure 11 can provide radial force for the core units 21. When the rotor core 20 rotates at high speed, the connecting structure 11 can prevent the core units 21 from being subjected to centrifugal force and producing radial displacement, thereby improving the rotation reliability of the rotor core 20 and improving the structural strength of the rotor core 20.

[0046] In the related art, the rotor core adopts a magnetic isolation bridge disconnection structure, so that the rotor core has a split structure to prevent magnetic leakage in the rotor core. However, this structure has low structural strength and cannot be used in conditions where the rotor assembly operates at high speed.

[0047] According to the rotor assembly 100 of the present invention, the rotor assembly 100 is connected to the core unit 21 through the connecting member 10, and the radial force is provided to the core unit 21 through the connecting structure 11. When the rotor core 20 rotates at a high speed, the connecting structure 11 can prevent the core unit 21 from being radially displaced by the centrifugal force, thereby improving the reliability of the rotation of the rotor core 20 and improving the structural strength of the rotor core 20.

[0048] In some embodiments of the present invention, the connector 10 is made of non-magnetic material (such as stainless steel or plastic) or weakly magnetic material (such as metal materials such as aluminum, magnesium, nickel, titanium, etc.), and the magnetic conductivity of the connector 10 is weaker than the magnetic conductivity of the rotor core 20, so that the connector 10 can connect multiple core units 21 while also playing a magnetic isolation role, preventing the generation of a magnetic bridge at the inner end of the rotor core 20, thereby preventing magnetic leakage at the inner end of the rotor core 20, and effectively improving the performance of the motor.

[0049] Combination Figure 2 , Figure 4 and Figure 5 In some embodiments of the present invention, the core unit 21 is provided with a positioning groove 211, and the positioning groove 211 extends outward from the inner end of the core unit 21 in a radial direction. The connector 10 includes a connector body 12, and the connecting structure 11 extends outward from the outer peripheral wall of the connector body 12 in a radial direction and is suitable for positioning and cooperating with the positioning groove 211.

[0050] Specifically, the core unit 21 is constructed as a fan-shaped structure, and multiple core units 21 are arranged in a circular shape. The radial inner ends of the multiple core units 21 are spaced apart to form a columnar space. The positioning groove 211 is recessed outward along the radial direction from one end of the core unit 21 close to the connecting piece 10, and the positioning groove 211 is spaced apart from the outer side wall of the core unit 21, that is, the positioning groove 211 is constructed as a groove structure with an open inner end and a closed outer end.

[0051] Furthermore, the connector body 12 is arranged in the columnar space, and the connector body 12 can be constructed as a column to adapt to the columnar space. The connecting structure 11 is arranged on the outer peripheral wall of the connector body 12 and is arranged opposite to the positioning groove 211. The connecting structure 11 can be arranged in the positioning groove 211. The size of the connecting structure 11 is designed so that the connecting structure 11 can be tightly matched with the positioning groove 211, so as to facilitate the positioning and matching of the connecting structure 11 with the positioning groove 211, thereby facilitating the positioning and installation of the connector 10 and the core unit 21. At the same time, the connecting structure 11 can generate radial force on the core unit 21. When the rotor core 20 rotates at high speed, the connecting structure 11 can prevent the core unit 21 from being subjected to centrifugal force and generating radial displacement, thereby improving the reliability of the rotation of the core unit 21 and effectively improving the structural strength of the rotor core 20.

[0052] In addition, the positioning groove 211 can be arranged to penetrate the core unit 21 in the axial direction, and the connecting structure 11 can be constructed as a column to adapt to the positioning groove 211, so as to increase the contact area between the connecting structure 11 and the positioning groove 211, improve the positioning and matching effect between the connecting structure 11 and the positioning groove 211, and at the same time improve the structural strength of the connecting structure 11 to prevent the connecting structure 11 from breaking.

[0053] Combination Figure 2 , Figure 4 and Figure 5 In some embodiments of the present invention, the connection structure 11 includes: an extension portion 111 and a positioning portion 112, the extension portion 111 extends in a radial direction, and the inner end of the extension portion 111 is connected to the connector body 12, the positioning portion 112 is provided on the extension portion 111, and the positioning portion 112 is used for positioning and cooperating with the positioning groove 211; wherein a radial force point is formed between the positioning portion 112 and the wall surface of the positioning groove 211.

[0054] Specifically, the radial inner end of the extension portion 111 is connected to the outer peripheral wall of the connector body 12, and a positioning portion 112 is provided on the extension portion 111. The positioning portion 112 can be stopped and matched with the inner wall surface of the positioning groove 211 in the radial direction, so that a radial force point is formed between the positioning portion 112 and the inner wall surface of the positioning groove 211, which facilitates the positioning and matching of the positioning portion 112 and the positioning groove 211, thereby facilitating the positioning and matching of the core unit 21 and the connector 10, thereby preventing the core unit 21 from being radially displaced due to centrifugal force when the rotor assembly 100 rotates at a high speed.

[0055] Combination Figure 2 , Figure 4 and Figure 5 In some embodiments of the present invention, the positioning portion 112 is disposed at the outer end of the extending portion 111 .

[0056] Specifically, the radial inner end of the extension portion 111 is connected to the connector body 12, and the positioning portion 112 is arranged at one end of the extension portion 111 away from the connector body 12 to facilitate the processing of the connector 10. The positioning groove 211 is adapted to the connecting structure 11, which helps to reduce the processing difficulty of the positioning groove 211.

[0057] Furthermore, the width dimension of the positioning portion 112 is greater than the width dimension of the extension portion 111. For example, the extension portion 111 can be constructed as a square column, the positioning portion 112 can be constructed as a cylindrical shape, the diameter dimension of the positioning portion 112 is greater than the width of the extension portion 111, and the shape of the positioning groove 211 is constructed to match the shape of the connecting structure 11, that is, the outer end of the positioning groove 211 (that is, the closed end of the positioning groove 211) can be constructed as a cylindrical groove structure whose size and shape are matched with the positioning portion 112, and the positioning portion 112 can be stop-fitted with the inner wall surface of the cylindrical groove structure to form a radial force point, so that the connector 10 is positioned and matched with the core unit 21.

[0058] When the rotation speed of the rotor assembly 100 is relatively high, the connecting member 10 can provide the core unit 21 with a radially inward pulling force to offset the centrifugal force acting on the core unit 21, thereby preventing the core unit 21 from being disengaged from the connecting structure 11 when the centrifugal force is relatively high, and improving the structural strength of the rotor core 20.

[0059] It should be noted that the connection structure 11 and the positioning groove 211 can be constructed as positioning matching structures of other shapes, as long as the positioning matching effect of the connection structure 11 and the positioning groove 211 can be guaranteed, and the specific structural shape is not limited here.

[0060] Combination Figure 6 and Figure 7 In some embodiments of the present invention, the core unit 21 is provided with a positioning protrusion 212, which extends inwardly from the inner end of the core unit 21 in a radial direction. The connector 10 includes a connector body 12, and the connecting structure 11 is constructed as an installation groove, which extends inwardly from the outer peripheral wall of the connector body 12 in a radial direction and is suitable for positioning and cooperating with the positioning protrusion 212.

[0061] Specifically, the mounting groove is constructed as a groove structure with an open outer end and a closed inner end. The mounting groove is recessed inward in the radial direction from the outer peripheral wall of the connector body 12. The positioning protrusion 212 is arranged at the inner end of the core unit 21 and extends in the radial direction toward the connector 10. The positioning protrusion 212 and the mounting groove are arranged opposite to each other in the radial direction. The positioning protrusion 212 can be arranged in the mounting groove to facilitate the positioning and matching of the positioning protrusion 212 and the mounting groove, so as to facilitate the positioning and matching of the connector 10 and the core unit 21.

[0062] In some embodiments of the present invention, the structure of the mounting groove may be the same as the structure of the above-mentioned positioning groove 211, and the structure of the positioning protrusion 212 may be the same as the above-mentioned connecting structure 11 extending outward in the radial direction. It should be noted that the width dimension of the radial inner end of the positioning protrusion 212 is larger, and the width dimension of the radial inner end of the mounting groove is larger. A radial force point is formed between the positioning protrusion 212 and the inner wall of the mounting groove. The matching method of the positioning protrusion 212 and the mounting groove and the technical effect are the same as the above-mentioned structure, which will not be elaborated here.

[0063] It should be noted that the installation groove and the positioning protrusion 212 may also be constructed as other structures, as long as the positioning and matching effect of the installation groove and the positioning protrusion 212 can be guaranteed, and the specific structure is not limited here.

[0064] Combination Figure 2 and Figure 3 In some embodiments of the present invention, the rotor assembly 100 further includes a plurality of magnetic members 30 , and a receiving groove is formed between any two adjacent core units 21 , and the magnetic member 30 is disposed in the receiving groove.

[0065] Specifically, a gap is formed between each two adjacent core units 21, and the gap is configured as a receiving groove. The magnetic member 30 and the receiving groove are adapted to each other, and the magnetic member 30 can be installed in the receiving groove. Figure 4 A radial limiting portion 214 is formed at the outer end of the core unit 21. The radial limiting portions 214 formed on every two adjacent core units 21 extend relative to each other. The radial limiting portions 214 can be abutted against the outer end of the magnetic component 30 in the radial direction to limit the magnetic component 30 in the radial direction and prevent the magnetic component 30 from falling out of the installation groove.

[0066] Furthermore, the opposite ends of the adjacent radial limiting portions 214 are spaced apart to prevent the outer end of the rotor core 20 from forming a magnetic isolation bridge, further preventing magnetic leakage of the rotor assembly 100 and improving the performance of the motor.

[0067] Combination Figure 2 and Figure 5 In some embodiments of the present invention, a stop protrusion 14 is also provided on the connector body 12. The stop protrusion 14 is provided on the outer peripheral wall of the connector body 12. The stop protrusion 14 protrudes from the connector body 12 along the radial direction toward one side of the magnetic component 30, and the stop protrusion 14 is cooperated with the magnetic component 30 to position the magnetic component 30 in the radial direction, thereby improving the assembly stability of the magnetic component 30.

[0068] In some embodiments of the present invention, the number of magnetic members 30 is an even number.

[0069] Specifically, the number of magnetic parts 30 is the same as the number of core units 21 and both are even numbers. When the number of magnetic parts 30 and core units 21 is n, the rotor core 20 can form n / 2 pairs of magnetic poles to prevent unilateral magnetic pulling force from being generated in the rotor assembly 100, thereby ensuring that the force on the motor is stable during operation, thereby ensuring the operating effect of the motor.

[0070] like Figure 1 As shown, in some embodiments of the present invention, the connector 10 and the rotor core 20 are integrally packaged with plastic.

[0071] Specifically, the connecting member 10 and the rotor core 20 can be integrally overmolded with a plastic coating, the plastic coating wraps the connecting member 10 and the rotor core 20 to form a plastic coating layer 51, the magnetic member 30 is arranged between the rotor core 20 and the connecting member 10, and the plastic coating can overmold the magnetic member 30, so that the magnetic member 30 can be fixed to the connecting member 10 and the rotor core 20 by an integral overmolding method, thereby improving the stability of the magnetic member 30 and at the same time improving the strength of the rotor core 20.

[0072] Furthermore, by positioning the connector 10 and the core unit 21, when the rotor core 20 rotates at high speed, the connector 10 can generate a radial force on the core unit 21 to offset the centrifugal force acting on the core unit 21, thereby preventing the core unit 21 from being radially displaced by the centrifugal force, thereby preventing the plastic coating layer 51 from cracking due to the displacement stress of the core unit 21, wherein the plastic coating can be a thermoplastic material (such as plastic, etc.).

[0073] Reference Figure 1 In some embodiments of the present invention, the rotor assembly 100 also includes a rotating shaft 50, the connecting member 10 and the rotor core 20 are sleeved on the rotating shaft 50, and the inner wall of the connecting member 10 is spaced apart from the outer peripheral wall of the rotating shaft 50, and the gap between the connecting member 10 and the rotating shaft 50 can be filled with plastic, so that the rotating shaft 50, the rotor core 20, the magnetic member 30 and the connecting member 10 can be integrally plastic-coated, thereby improving the structural strength of the rotor assembly 100.

[0074] Combination Figure 2 , Figure 4 and Figure 5 In some embodiments of the present invention, the connector 10 is provided with a plurality of first through holes 13 extending through the connector 10 in the axial direction, and the plurality of first through holes 13 are evenly spaced and arranged on the circumference of the connector 10 .

[0075] Specifically, multiple first through holes 13 and the core unit 21 are staggered in the radial direction. The first through holes 13 can be used to inject plastic, and the plastic can form a columnar structure in the first through holes 13. The columnar structure can be connected to the plastic layer 51 wrapped around the connector 10 and the core unit 21, so as to improve the structural strength of the connector 10 while connecting the connector 10 to the plastic layer 51.

[0076] Combination Figure 2 , Figure 4 and Figure 5 In some embodiments of the present invention, the core unit 21 is provided with a second through hole 213 extending through the core unit 21 in the axial direction.

[0077] Specifically, the second through hole 213 can be used for injecting plastic, and the plastic can form a columnar structure in the second through hole 213, which can be connected to the plastic layer 51 wrapped around the connecting piece 10 and the core unit 21, so as to improve the structural strength of the core unit 21 while connecting the core unit 21 to the plastic layer 51 wrapped around the connecting piece 10.

[0078] As a result, the connector 10 and the core unit 21 can be connected via the plastic coating layer 51, further improving the positioning effect between the connector 10 and the core unit 21, preventing the core unit 21 from being radially displaced by centrifugal force, improving the rotation reliability of the rotor assembly 100, and improving the structural strength of the rotor core 20.

[0079] In some embodiments of the present invention, the connector 10 is suitable for being injection molded by overmolding.

[0080] Specifically, when the strength of the plastic coating is sufficient, that is, the stress generated by the displacement of the core unit 21 when the rotor assembly 100 runs at high speed will not destroy the plastic coating, the connecting piece 10 can be injection molded by the plastic coating. When the rotor core 20 is sleeved on the rotating shaft 50, the plastic coating is poured between the rotating shaft 50 and the rotor core 20, so that the connecting piece 10 can be injection molded by the plastic coating. While ensuring the strength of the rotor assembly 100, there is no need to process the connecting piece 10 separately, which simplifies the assembly of the rotor assembly 100. At the same time, the rotor core 20 and the rotating shaft 50 are integrally plastic-coated, which further improves the structural strength of the rotor assembly 100.

[0081] In some embodiments of the present invention, the tensile strength of the connector 10 is higher than the tensile strength of the encapsulating material.

[0082] Specifically, when the structural strength of the plastic coating is insufficient, the connector 10 is processed and formed separately, and the tensile strength of the connector 10 is higher than that of the plastic coating, so as to prevent the displacement stress generated by the centrifugal force on the core unit 21 when the rotor assembly 100 runs at high speed from damaging the connector 10, thereby ensuring the positioning effect of the connector 10 on the core unit 21 and ensuring the structural strength of the rotor assembly 100.

[0083] like Figure 2 As shown, in some embodiments of the present invention, the core unit 21 is formed by stacking a plurality of silicon steel sheets, and the plurality of stacked silicon steel sheets can be connected via buckle points 215, wherein the buckle points 215 can be constructed as rivet buckle points.

[0084] The motor according to the present invention includes the rotor assembly 100 described above.

[0085] Since the motor is provided with the above-mentioned rotor assembly 100, which is connected to the core unit 21 through the connecting piece 10, and the radial force is provided to the core unit 21 through the connecting structure 11, when the rotor core 20 rotates at a high speed, the connecting structure 11 can prevent the core unit 21 from being displaced by the centrifugal force, thereby improving the reliability of the rotation of the rotor core 20, thereby preventing the plastic coating layer 51 from being cracked due to the displacement stress of the core unit 21, and improving the structural strength of the rotor assembly 100.

[0086] In some embodiments of the present invention, the motor includes a stator assembly, which is sleeved on the radial outside of the rotor assembly 100, and the stator assembly and the rotor assembly 100 are spaced apart in the radial direction, and the stator assembly includes a stator core 200 and a stator winding, and the stator core 200 and the stator winding are integrally encapsulated to improve the structural strength of the stator assembly, wherein the material types of the encapsulating plastic used for encapsulating the rotor assembly 100 and the material types of the encapsulating plastic used for encapsulating the rotor assembly 100 may be different, and the specific material type may be determined based on the actual processing and production of the motor, and is not specifically limited here.

[0087] Combination Figure 3 and Figure 8 In some embodiments of the present invention, the stator core 200 is suitable for being pre-processed into a straight chain structure.

[0088] Specifically, the stator core 200 can be composed of a plurality of core monomers 210, the side ends of two adjacent core monomers 210 are connected, and a gap is formed between adjacent core monomers 210. When the stator core 200 is not assembled, the stator core 200 extends in a straight line, and two groups of stator cores 200 can be inserted and arranged with each other to improve the space utilization when the stator core 200 is placed.

[0089] Furthermore, the core monomer 210 includes a first part 211 and a second part 212, and the first part 211 and the second part 212 are arranged perpendicular to each other, wherein the extension direction of the second part 212 is perpendicular to the extension direction of the stator core 200, and a side wall of the first part 211 away from the second part 212 extends in an arc shape. When the stator core 200 needs to be assembled, the stator core 200 can be bent to form a cylindrical shape to meet the assembly requirements of the stator core 200.

[0090] The electrical equipment according to the present invention comprises the above-mentioned motor.

[0091] Since the electrical equipment is provided with the above-mentioned motor, it is connected to the core unit 21 through the connecting piece 10, and the radial force is provided to the core unit 21 through the connecting structure 11. When the rotor core 20 rotates at high speed, the connecting structure 11 can prevent the core unit 21 from being radially displaced by the centrifugal force, thereby improving the reliability of the rotation of the rotor core 20 and improving the structural strength of the rotor core 20.

[0092] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" 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 present invention. 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 may be combined in any one or more embodiments or examples in a suitable manner.

[0093] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A rotor assembly, characterized in that: include: A connecting piece, wherein the connecting piece is provided with a plurality of connecting structures, and the plurality of connecting structures are sequentially spaced in a circumferential direction of the connecting piece; The rotor core comprises a plurality of core units, the plurality of core units are arranged in sequence and at intervals around the connecting member, the connecting structure is connected to the core units and is suitable for positioning the connecting member and the core units in a radial direction.

2. The rotor assembly according to claim 1, characterized in that: The core unit is provided with a positioning groove, and the positioning groove extends outward from the inner end of the core unit along the radial direction; The connecting piece comprises a connecting piece body, and the connecting structure extends outwardly from the outer peripheral wall of the connecting piece body along the radial direction and is suitable for positioning and matching with the positioning groove.

3. The rotor assembly according to claim 2, characterized in that: The connection structure comprises: An extension portion, the extension portion extends in a radial direction, and an inner end of the extension portion is connected to the connector body; A positioning portion, the positioning portion is arranged on the extension portion, and the positioning portion is used to position and cooperate with the positioning groove; Wherein, a radial force point is formed between the positioning portion and the wall surface of the positioning groove.

4. The rotor assembly according to claim 3, characterized in that: The positioning portion is arranged at the outer end of the extending portion.

5. The rotor assembly according to claim 1, characterized in that: The core unit is provided with a positioning protrusion, and the positioning protrusion extends inwardly from the inner end of the core unit along the radial direction; The connecting member comprises a connecting member body, the connecting structure is configured as a mounting groove, the mounting groove extends inwardly along the radial direction from the outer peripheral wall of the connecting member body and is suitable for positioning and cooperating with the positioning protrusion.

6. The rotor assembly according to claim 1, characterized in that It also includes a plurality of magnetic parts, and a receiving groove is formed between any two adjacently arranged core units, and the magnetic part is arranged in the receiving groove.

7. The rotor assembly according to claim 6, characterized in that The number of the magnetic members is an even number.

8. The rotor assembly according to claim 1, characterized in that The connecting piece and the rotor core are integrally packaged with plastic.

9. The rotor assembly according to claim 8, characterized in that The connecting member is provided with a plurality of first through holes which are arranged through the connecting member in the axial direction, and the plurality of first through holes are evenly spaced and arranged on the circumference of the connecting member.

10. The rotor assembly according to claim 8, characterized in that The core unit is provided with a second through hole which is arranged to penetrate along the axial direction.

11. The rotor assembly according to claim 8, characterized in that The connecting piece is suitable for being injection molded by overmolding.

12. The rotor assembly according to claim 11, characterized in that The tensile strength of the connecting member is higher than the tensile strength of the encapsulating material.

13. The rotor assembly according to claim 1, characterized in that It also includes a rotating shaft, and the connecting piece is sleeved on the rotating shaft and fixedly connected to the rotating shaft.

14. A motor, characterized in that: Comprising a rotor assembly according to any one of claims 1-13.

15. An electrical device, characterized in that: Comprising an electric machine according to claim 14.

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