Stator device and motor

Abstract

The embodiment of the invention discloses a stator device and a motor. The stator device includes: a bracket having an annular portion; the iron core comprises at least three iron core single bodies; the at least three iron core monomers are radially arranged along the circumferential direction of the annular part; a wire slot is formed between every two adjacent iron core monomers; each iron core monomer is provided with an inner surface facing the axis side; and the connecting piece enables the inner surface of the iron core monomer to be attached to the outer surface of the annular part.

Description

Technical Field

[0001] This application relates to the field of stator technology, and more particularly to a stator device and motor. Background Technology

[0002] Electric motors are commonly used devices. They generally consist of a stator structure and a rotor structure. In related technologies, the iron core structure of the stator is usually made into a single integral structure, which makes the stator structure inconvenient to assemble and affects the adaptability of the motor. Summary of the Invention

[0003] In view of this, embodiments of this application aim to provide a stator device and a motor.

[0004] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0005] This application provides a stator device, including:

[0006] The stent has a ring-shaped portion;

[0007] The iron core includes at least three iron core units; the at least three iron core units are arranged radially along the circumference of the annular portion; a groove is provided between two adjacent iron core units; the iron core units have an inner surface facing the axis side;

[0008] The connector makes the inner surface of the iron core unit fit with the outer surface of the annular part.

[0009] In some alternative implementations, the core unit has a first connecting portion; the bracket has a second connecting portion corresponding to the position of the first connecting portion; and the connector is disposed between the first connecting portion and the second connecting portion.

[0010] In some alternative implementations, the connector contacts the first connecting portion, and the connector is used to provide a radial force toward the axis side to the first connecting portion; and / or,

[0011] The connector is connected to the first connecting part and the second connecting part respectively.

[0012] In some alternative implementations, the first connecting portion is located inside the annular portion; the second connecting portion is disposed on the side of the first connecting portion away from the axis; the connector is disposed between the first connecting portion and the second connecting portion; the connector contacts the first connecting portion and is used to provide a radial force toward the axis side to the first connecting portion.

[0013] In some alternative implementations, the second connecting portion includes the inner surface of the annular portion; or,

[0014] The second connecting portion includes a first boss disposed on the end face of the annular portion; or,

[0015] The second connecting portion includes a second boss disposed on the fixing portion of the bracket.

[0016] In some alternative implementations, the first connecting portion includes a first protrusion, and the connector is inserted between the first protrusion and the second connecting portion; or,

[0017] The first connecting portion includes a first connecting hole; a first part of the connector is inserted into the first connecting hole and contacts the surface of the first connecting hole near the axis; a second part of the connector is located between the first connecting hole and the second connecting portion.

[0018] In some alternative implementations, the annular portion has at least three openings along its circumference, and the first connecting portion passes through the openings and is located inside the annular portion.

[0019] In some alternative implementations, the portion of the connector located between the first connecting portion and the second connecting portion is length-adjustable based on external force, so that the connector contacts both the first connecting portion and the second connecting portion respectively; or,

[0020] The stator assembly further includes a tensioning member, at least a portion of which is inserted between the second connecting portion and the connecting member, such that the tensioning member contacts the second connecting portion and the connecting member respectively.

[0021] In some alternative implementations, the first connecting portion is located outside the annular portion; the second connecting portion is disposed on the side of the first connecting portion near the axis; the connector is disposed between the first connecting portion and the second connecting portion; the connector contacts the first connecting portion and is used to provide a radial force toward the axis side to the first connecting portion.

[0022] In some alternative implementations, the first connecting portion includes a second protrusion, and the connector is sandwiched between the second protrusion and the second connecting portion; or,

[0023] The first connecting portion includes a second connecting hole; the connector is inserted into the second connecting hole; the connector is clamped between the wall of the second connecting hole near the axis and the second connecting portion.

[0024] In some alternative implementations, the core unit has at least two spaced-apart first connecting portions in the axial direction, and the connector is disposed between the at least two first connecting portions and the second connecting portion.

[0025] In some alternative implementations, the annular portion has two adjacent annular units in the axial direction; the core unit has two spaced-apart first connecting portions at both ends in the axial direction, and the positions of the two first connecting portions correspond to the positions of the two annular units.

[0026] The bracket has two second connecting parts that correspond to the positions of the two first connecting parts, respectively;

[0027] The connector is disposed between the two first connecting parts and the two second connecting parts.

[0028] In some alternative implementations, the outer surface of the annular portion is the outermost surface of the annular portion in the circumferential direction;

[0029] The outer surface of the annular portion is formed by a circle extending axially, and the inner surface of the iron core unit is an arc surface; or, the inner surface of the iron core unit is a plane, and the area in contact between the outer surface of the annular portion and the inner surface of the iron core unit is a plane.

[0030] In some alternative implementations, the annular portion has a first flange and a second flange at both ends in the axial direction; a portion of the core unit is inserted between the first flange and the second flange.

[0031] In some alternative implementations, the outer surface of the core unit is an arc surface, and the bracket also has a fixing part located within the space defined by the annular portion, the fixing part having a third connecting hole in the axial direction;

[0032] The stator assembly further includes:

[0033] The conductor is at least partially wound around the tooth grooves of the iron core unit;

[0034] The shaft is partially fitted into the third connecting hole.

[0035] This application also provides an electric motor, characterized in that it includes the stator device and rotor described in this application embodiment, wherein the rotor is sleeved outside the stator device.

[0036] The stator device of this application includes at least three core units, with a wire groove provided between two adjacent core units. At least a portion of the conductors of the stator device can be quickly wound around the outside of the core units before the core units with conductors are connected to the support, thereby enabling convenient and quick winding of the cores and easy assembly of the stator device. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of an optional structure of the stator device in an embodiment of this application;

[0038] Figure 2 This is a schematic diagram of an optional partial structure of the stator device in an embodiment of this application;

[0039] Figure 3 This is an optional structural cross-sectional view of the stator device in an embodiment of this application;

[0040] Figure 4 for Figure 3 A partial structural diagram;

[0041] Figure 5 for Figure 3 A schematic diagram of an optional structure for a single iron core unit;

[0042] Figure 6 for Figure 5 A schematic diagram of the structure of a single sheet in a medium-strength iron core;

[0043] Figure 7 for Figure 3 Schematic diagram of the middle connector;

[0044] Figure 8 This is a schematic diagram of another optional partial structure of the stator device in the embodiments of this application;

[0045] Figure 9 This is a schematic diagram of another optional partial structure of the stator device in the embodiments of this application;

[0046] Figure 10 This is a schematic diagram of another optional partial structure of the stator device in an embodiment of this application;

[0047] Figure 11 This is a schematic diagram of another optional partial structure of the stator device in an embodiment of this application.

[0048] Reference numerals: 100, bracket; 110, annular portion; 111, outer surface of the annular portion; 112, opening; 113, inner surface of the annular portion; 114, first flange; 115, second flange; 116, annular unit; 120, fixing portion; 121, third connecting hole; 122, plate-shaped portion; 123, cylindrical portion; 130, second connecting portion; 200, iron core; 201, wire groove; 210, iron core unit; 211, first connecting portion; 2111, first connecting hole; 2112, first protrusion; 2113, second connecting hole; 2114, second protrusion; 212, inner surface of the iron core unit; 213, toothed groove; 214, unit plate; 215, outer surface of the iron core unit; 220, wire; 300, connector; 400, shaft. Detailed Implementation

[0049] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0050] In the embodiments described in this application, it should be noted that, unless otherwise stated and limited, the term "connection" should be interpreted broadly. For example, it can be an electrical connection, or a connection between two internal components. It can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above term according to the specific circumstances.

[0051] It should be noted that the terms "first," "second," and "third" used in the embodiments of this application are merely used to distinguish similar objects and do not represent a specific ordering of objects. It is understood that "first," "second," and "third" can be interchanged in a specific order or sequence where permitted. It should be understood that the objects distinguished by "first," "second," and "third" can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in an order other than those illustrated or described herein.

[0052] The following combination Figures 1 to 11 The stator device described in the embodiments of this application will be described in detail.

[0053] The stator assembly includes a support 100, a core 200, and a connector 300. The support 100 has an annular portion 110; the core 200 includes at least three core units 210; the at least three core units 210 are arranged radially along the circumference of the annular portion 110; a groove 201 is provided between two adjacent core units 210; the core units 210 have an inner surface facing the axis; the connector 300 fits the inner surface 212 of the core units and the outer surface 111 of the annular portion so that the distance between the outer surfaces 215 of the at least three core units 210 and the axis is the same.

[0054] In related technologies, the stator core structure is generally made into a single integral structure, which makes stator assembly inconvenient. For example, when winding the integral core structure, the wire needs to enter the slot from the outer slot of the integral core structure, which is inconvenient for winding and makes it difficult to arrange the wire neatly. The space in the slot is also not fully utilized, resulting in low slot utilization and low slot fill rate, and thus low motor performance. In contrast, the stator device of this application includes at least three core units 210 in the core 200, with a slot 201 between two adjacent core units 210. Here, at least a portion of the conductor 220 of the stator device can be quickly wound around the outer side of the core unit 210 before the core unit 210 with conductor 220 is connected to the support 100, thereby enabling convenient and quick winding of the core 200. At the same time, since it is not limited by the slot, the conductor 220 can also fill the slot 201 of the core 200, which can increase the cross-sectional area of ​​the conductor 220 in the slot 201, thus greatly improving the performance of the motor. In addition, the connector 300 can make the inner surface 212 of the core unit and the outer surface 111 of the annular portion fit together so that the distance between the outer surface 215 of at least three core units and the axis is the same, thereby greatly reducing the outer diameter error of the core 200 formed by at least three core units 210, making the gap between the stator assembly and the rotor more uniform in the circumferential direction, and improving the stability of the rotor rotation.

[0055] In this embodiment, the structure of the support 100 is not limited. For example, as Figure 1 and Figure 2 As shown, the bracket 100 may include an annular portion 110 and a fixing portion 120. The annular portion 110 is used to define the position of the iron core 200, and the fixing portion 120 is used to connect with the shaft 400 of the stator device.

[0056] As an example, such as Figure 2 and Figure 3 As shown, the bracket 100 may also have a fixing part 120 located within the space defined by the annular portion 110, the fixing part 120 having a third connecting hole 121 in the axial direction; the stator assembly may also include: a conductor 220 and a shaft 400. At least a portion of the conductor 220 is wound around the toothed groove 213 of the core unit 210; a portion of the shaft 400 is engaged in the third connecting hole 121.

[0057] Here, the shape of the fixing part 120 is not limited. For example, the fixing part 120 can be a plate-like structure, and a third connecting hole 121 can be provided on the fixing part 120. For another example, such as... Figure 2 and Figure 3As shown, the fixing part 120 may include two plate-shaped parts 122 and a cylindrical part 123 arranged axially adjacent to each other. The inner cavity of the cylindrical part 123 defines a third connecting hole 121. The two plate-shaped parts 122 are fixed to the outer side of the cylindrical part 123. The cylindrical part 123 can increase the length of the axial connection between the fixing part 120 and the shaft 400. The two plate parts can reduce the volume and weight of the fixing part 120 and improve the connection strength of the fixing part 120.

[0058] In this embodiment, the outer surface 111 of the annular portion is the surface of the annular portion 110 facing away from the axis, and the axis is the axis of the stator device. As an example, the axis is the axis of the shaft 400. The inner surface 113 of the annular portion is the surface of the annular portion 110 facing the axis. The outer surface 111 and the inner surface 113 of the annular portion are annular surfaces.

[0059] The shape of the outer surface 111 of the annular portion is not limited. The outer surface 111 of the annular portion is the outermost surface of the annular portion 110 in the circumferential direction, and the outer surface 111 of the annular portion is the non-recessed surface of the annular portion 110 in the circumferential direction. That is, the outer surface 111 of the annular portion does not include the inner recessed surface of the annular portion 110 in the circumferential direction. For example, the outer surface 111 of the annular portion can be formed by extending a circle in the axial direction, where the outer surface 111 of the annular portion is an arc surface. For another example, the outer surface 111 of the annular portion can include an arc surface and a plane. For yet another example, the outer surface 111 of the annular portion is an annular structure formed by connecting multiple planes.

[0060] In this embodiment, the number of core monomers 210 is the same as the number of slots 201 in the core 200, and a slot 201 of the core 200 is defined between two adjacent core monomers 210; each core monomer 210 is a tooth of the core 200, and most or all of each core monomer 210 is located outside the annular portion 110; the portion of each core monomer 210 near the annular portion 110 is the yoke of the core monomer 210, and the portion of each core monomer 210 away from the annular portion 110 is the tooth of the core monomer 210. The slot 201 may be located at the tooth. Here, the outer side of the core monomer 210 may or may not have a tooth 213, as long as a slot 201 of the core 200 is defined between two adjacent core monomers 210. Figure 5 and Figure 6 As shown, each core unit 210 may include at least two unit pieces 214, which are stacked together axially to form the core unit 210.

[0061] At least three core units 210 can be evenly arranged along the circumference of the annular portion 110. Of course, in some embodiments, at least three core units 210 can also be unevenly arranged along the circumference of the annular portion 110.

[0062] When the outer side of the core unit 210 has a toothed groove 213, the toothed groove 213 on the outer side of the core unit 210 is used to define the winding position of the conductor 220 and to accommodate the conductor 220. When the core unit 210 is not assembled onto the bracket 100, the outer side of the core unit 210 is an open space, at which time the conductor 220 can be quickly and easily wound onto the core unit 210.

[0063] The core unit 210 has an inner surface facing the axis and an outer surface facing away from the axis, and the outer surface 215 of the core unit is an arc surface. The shape of the inner surface 212 of the core unit is not limited, as long as the inner surface 212 of the core unit can contact the outer surface 111 of the annular portion. The shape of the contact area between the outer surface 111 of the annular portion and the inner surface 212 of the core unit can be the same or different. When the shape of the contact area between the outer surface 111 of the annular portion and the inner surface 212 of the core unit is the same, the contact area between the outer surface 111 of the annular portion and the inner surface 212 of the core unit can be increased, thereby improving the connection strength between the support 100 and the core unit 210.

[0064] As an example, the outer surface 111 of the annular portion can be formed by extending a circle axially. Here, the outer surface 111 of the annular portion is an arc surface. Correspondingly, the inner surface 212 of the core unit can also be an arc surface with the same or approximately the same diameter. Thus, by contacting the outer surface 111 of the annular portion and the inner surface 212 of the core unit, the error in the inner diameter of the core 200 formed by at least the core unit 210 can be reduced, allowing at least three core units 210 to form an annular core 200 structure. When the outer surface 111 of the annular portion can be formed by extending a circle axially, the outer surface 111 of the annular portion can be formed in one machining operation using a single tool, thereby greatly improving the overall dimensional accuracy of the outer surface 111 of the annular portion. When the inner surfaces 212 of at least two core units are in contact with the outer surface 111 of the annular portion of the same reference, the accuracy of the distance between the outer surfaces 215 of at least three core units 210 and the axis can be greatly improved.

[0065] As another example, the inner surface 212 of the core unit is a plane, and the area where the outer surface 111 of the annular portion contacts the inner surface 212 of the core unit can also be a plane. Here, the outer surface 111 of the annular portion can be an annular surface formed by multiple planes; of course, the outer surface 111 of the annular portion can also include an arc surface located between two planes. Here, the plane of the annular portion 110 can be a plane formed by extending a chord on a full circle along the axial direction.

[0066] In this embodiment, the connector 300 can be connected to the bracket 100 and the core unit 210 respectively, so that the inner surface 212 of the core unit and the outer surface 111 of the annular portion come into contact. Here, the connector 300 can also provide a radial force toward the axis side to the core unit 210, so that the inner surface 212 of the core unit is always pressed against the outer surface 111 side of the annular portion.

[0067] Of course, the connector 300 may not be connected to at least one of the support 100 and the core unit 210. For example, the connector 300 may contact the core unit 210 and provide a radial force toward the axis side to the core unit 210 so that the inner surface 212 of the core unit is always pressed against the outer surface 111 of the annular portion; thereby keeping the inner surface 212 of the core unit in contact with the outer surface 111 of the annular portion. Here, the connector 300 may contact the support 100 or be spaced apart from the support 100.

[0068] For example, the connector 300 can be connected to the bracket 100 and the core unit 210 by means of bonding, snap-fitting, welding, etc. As an example, the connector 300 can be an adhesive provided between the periphery of the inner surface 212 of the core unit and the annular portion 110. As another example, the connector 300 can be a welded portion provided between the periphery of the inner surface 212 of the core unit and the annular portion 110.

[0069] In some optional implementations of the embodiments of this application, the core unit 210 may have a first connecting portion 211; the bracket 100 may have a second connecting portion 130 corresponding to the position of the first connecting portion 211; and the connector 300 is disposed between the first connecting portion 211 and the second connecting portion 130.

[0070] In this implementation, the connector 300 can be connected to the first connecting portion 211 and the second connecting portion 130 respectively, so that the inner surface 212 of the core unit and the outer surface 111 of the annular portion are in contact. Of course, the connector 300 may not be connected to at least one of the first connecting portion 211 and the second connecting portion 130. For example, the connector 300 contacts the first connecting portion 211, and the connector 300 is used to provide a radial force toward the axis side to the core unit 210, so that the inner surface 212 of the core unit is always pressed against the outer surface 111 of the annular portion; thereby keeping the inner surface 212 of the core unit and the outer surface 111 of the annular portion in contact. Here, the connector 300 can contact the second connecting portion 130 or be spaced apart from the second connecting portion 130. Alternatively, the connector 300 can be connected to the first connecting portion 211 and the second connecting portion 130 respectively by means of bonding, snap-fitting, welding, etc.

[0071] In this implementation, the position of the first connecting portion 211 is not limited. The first connecting portion 211 can be located inside or outside the annular portion 110. The structure of the first connecting portion 211 is not limited. For example, the first connecting portion 211 can be a block structure. Or, for example, the first connecting portion 211 can include a hole structure.

[0072] The number of first connecting parts 211 is not limited. For example, such as Figure 5 As shown, the core unit 210 has at least two spaced-apart first connecting portions 211 in the axial direction, and the connector 300 is disposed between the at least two first connecting portions 211 and the second connecting portion 130 to improve the connection strength between the core unit 210 and the support 100. Of course, the core unit 210 may also have only one first connecting portion 211.

[0073] In this implementation, such as Figure 2 As shown, the annular portion 110 may have two adjacent annular units 116 arranged axially; the core unit 210 may have two spaced-apart first connecting portions 211 at both ends axially, the positions of the two first connecting portions 211 corresponding to the positions of the two annular units 116; the bracket 100 may have two second connecting portions 130 corresponding to the positions of the two first connecting portions 211 respectively; the connector 300 is disposed between the two first connecting portions 211 and the two second connecting portions 130 to improve the connection strength between the core unit 210 and the bracket 100. When the bracket 100 includes two annular units 116, the fixing portion 120 may be located adjacent to the two annular units 116. Here, the two annular units 116 can be connected by the fixing portion 120. Of course, the bracket 100 may also have only one annular unit 116 axially, that is, the annular portion 110 is an integral annular structure.

[0074] In this implementation, the position of the second connecting portion 130 is not limited. The second connecting portion 130 can be located in the annular portion 110 or in the fixing portion 120. The structure of the second connecting portion 130 is not limited. For example, the second connecting portion 130 can be a block structure. Or, for example, the second connecting portion 130 can include a hole structure.

[0075] In this implementation, the structure of the connector 300 is not limited. For example, the connector 300 can be a block structure or a strip structure. As another example, the connector 300 can also be a clamp structure.

[0076] Example 1: The first connecting part 211 is located inside the annular part 110; the second connecting part 130 is disposed on the side of the first connecting part 211 away from the axis; the connector 300 is disposed between the first connecting part 211 and the second connecting part 130; the connector 300 contacts the first connecting part 211 and is used to provide a radial force toward the axis side to the first connecting part 211 so that the inner surface 212 of the core unit and the outer surface 111 of the annular part fit together.

[0077] In Example 1, most of the core unit 210 is located outside the annular portion 110, and the first connecting portion 211 of the core unit 210 is located inside the annular portion 110.

[0078] In Example 1, the structure of the first connecting portion 211 is not limited, as long as the connector 300 can provide a radial force toward the axis side to the first connecting portion 211, so that the inner surface 212 of the core unit is pressed against the outer surface 111 of the annular portion. For example, the first connecting portion 211 includes a first connecting hole 2111; a first portion of the connector 300 is inserted into the first connecting hole 2111 and contacts the surface of the first connecting hole 2111 near the axis side; a second portion of the connector 300 is located between the first connecting hole 2111 and the second connecting portion 130. As another example, the first connecting portion 211 includes a first protrusion 2112, and the connector 300 is inserted between the first protrusion 2112 and the second connecting portion 130.

[0079] In Example 1, the structure of the second connecting portion 130 is not limited. For example, the second connecting portion 130 may include the inner surface 113 of the annular portion. As another example, the second connecting portion 130 may include a first boss disposed on the end face of the annular portion 110. Yet another example, the second connecting portion 130 may include a second boss disposed on the fixing portion 120 of the bracket 100.

[0080] In Example 1, the structure of the connector 300 is not limited, as long as it can provide a radial force toward the axis side to the first connecting part 211.

[0081] In the first structure of the connector 300, the portion of the connector 300 located between the first connecting portion 211 and the second connecting portion 130 can be adjusted in length by external force to allow the connector 300 to contact the first connecting portion 211 and the second connecting portion 130 respectively. Due to manufacturing errors, the length of the connector 300 between the first connecting portion 211 and the second connecting portion 130 can be set relatively short, allowing the connector 300 to easily contact the first connecting portion 211 during assembly. To allow the connector 300 to contact the second connecting portion 130, the length of the connector 300 can be increased by external force to allow the connector 300 to contact the second connecting portion 130. Alternatively, the length of the connector 300 between the first connecting portion 211 and the second connecting portion 130 can be set relatively long, allowing the connector 300 to be inserted between the first connecting portion 211 and the second connecting portion 130 by external force during assembly.

[0082] In a second configuration of the connector 300, the stator assembly may further include a tensioning member, at least a portion of which is inserted between the second connecting portion 130 and the connector 300, such that the tensioning member contacts both the second connecting portion 130 and the connector 300, thereby providing a radial force toward the axial side to the first connecting portion 211 through the tensioning member and the connector 300. Due to manufacturing tolerances, the length of the connector 300 between the first connecting portion 211 and the second connecting portion 130 can be relatively short. During assembly, the connector 300 can be easily inserted between the first connecting portion 211 and the second connecting portion 130 and contacts the first connecting portion 211. Here, a gap exists between the connector 300 and the second connecting portion 130. By inserting at least a portion of the tensioning member between the second connecting portion 130 and the connector 300, the tensioning member can contact both the second connecting portion 130 and the connector 300. The shape of the tensioning member is not limited. For example, the tensioning member can be a wedge-shaped structure. For example, the cross-section of a tensioning element can be trapezoidal.

[0083] For example, such as Figure 3 , Figure 4 and Figure 5 As shown, the first connecting portion 211 includes a first connecting hole 2111, the second connecting portion 130 is the inner surface 113 of the annular portion, the first part of the connector 300 is inserted into the first connecting hole 2111 and contacts the surface of the first connecting hole 2111 near the axis; the second part of the connector 300 is located between the first connecting hole 2111 and the second connecting portion 130, and the connector 300 is used to provide a radial force toward the axis side to the wall of the first connecting hole 2111, so that the inner surface 212 of the core unit is pressed against the outer surface 111 side of the annular portion.

[0084] Here, the second connecting portion 130 is the inner surface 113 of the annular portion. By using the inner surface 113 of the annular portion as the second connecting portion 130, the structure of the bracket 100 can be greatly simplified. Of course, the second connecting portion 130 may also include a first boss provided on the end face of the annular portion 110. Alternatively, the second connecting portion 130 may also include a second boss provided on the fixing portion 120 of the bracket 100.

[0085] Here, the structure of the connector 300 is not limited, as long as the connector 300 can provide a radial force toward the axis side to the first connecting part 211 so that the inner surface 212 of the core unit is pressed against the outer surface 111 side of the annular part.

[0086] As an example, such as Figure 4 and Figure 7 As shown, the connector 300 can be a locating pin. The middle part of the locating pin can be easily inserted into the first connecting hole 2111. The two ends of the locating pin are deformed under the action of external force, and the length between the first connecting hole 2111 and the inner surface 113 of the annular portion increases, so that the middle part of the locating pin contacts the surface of the first connecting hole 2111 near the axis, and the two ends of the locating pin contact the inner surface 113 of the annular portion. For example, the two ends of the locating pin are deformed by striking them with a hammer, so that the middle part of the locating pin contacts the surface of the first connecting hole 2111 near the axis, and the two ends of the locating pin are deformed and contact the inner surface 113 of the annular portion. As another example, the connector 300 can be a strip structure. The two ends of the connector 300 can be bent by external force to contact the inner surface 113 of the annular portion, and the middle part of the connector 300 contacts the surface of the first connecting hole 2111 near the axis.

[0087] As another example, the length of the connector 300 between the first connecting hole 2111 and the inner surface 113 of the annular portion can be set to be relatively short. During assembly, the connector 300 can be easily inserted into the first connecting hole 2111. Here, there is a gap between the connector 300 and the inner surface 113 of the annular portion. By inserting at least a portion of the tensioner between the inner surface 113 of the annular portion and the connector 300, the tensioner can contact the inner surface 113 of the annular portion and the connector 300 respectively.

[0088] For example, such as Figure 8 and Figure 9 As shown, the first connecting portion 211 may include a first protrusion 2112, the second connecting portion 130 is the inner surface 113 of the annular portion, and the connector 300 is inserted between the first protrusion 2112 and the inner surface 113 of the annular portion. The connector 300 is used to provide a radial force to the first protrusion 2112 toward the axial side so that the inner surface 212 of the iron core unit is pressed against the outer surface 111 side of the annular portion.

[0089] The structure of the second connecting part 130 here is similar to that of the second connecting part 130 described above, and will not be repeated here.

[0090] The structure of the connector 300 here is similar to that of the connector 300 described above, and will not be repeated here.

[0091] As an example, such as Figure 8 and Figure 9 As shown, the connector 300 can be a block structure. The connector 300 deforms under external force so that it contacts the inner surface 113 of the first protrusion 2112 and the annular portion, respectively; for example, the connector 300 can be deformed by striking it with a hammer. As another example, the connector 300 can be a frame structure, or it can be an annular structure, which can be deformed by external force to contact the inner surface 113 of the first protrusion 2112 and the annular portion, respectively.

[0092] In Example 1, such as Figure 2 As shown, the annular portion 110 may have at least three openings 112 along the circumferential direction, and the first connecting portion 211 may pass through the openings 112 and be located inside the annular portion 110.

[0093] Here, the number of openings 112 can be the same as the number of core units 210. The first connecting portion 211 of each core unit 210 can pass through one opening 112. Of course, the number of openings 112 can also be twice the number of core units 210, such as... Figure 2 As shown; here, each core unit 210 may include two first connecting parts 211, each first connecting part 211 passing through an opening 112.

[0094] Here, the opening 112 also serves to define the mounting position of the core unit 210 in the circumferential direction of the annular portion 110. The presence of at least three openings 112 allows each core unit 210 to be positioned at a specific location along the circumferential direction of the annular portion 110.

[0095] Of course, the annular portion 110 may not have an opening 112. Here, the first connecting portion 211 can be located inside the annular portion 110 through one end of the annular portion 110. Here, each core unit 210 can be located through a positioning mark on the annular portion 110. Alternatively, the positioning protrusion can define the circumferential mounting position of the core unit 210 in the annular portion 110.

[0096] Example 2: The first connecting portion 211 is located on the outside of the annular portion 110; the second connecting portion 130 is disposed on the side of the first connecting portion 211 near the axis; the connector 300 is disposed between the first connecting portion 211 and the second connecting portion 130; the connector 300 contacts the first connecting portion 211 and is used to provide a radial force toward the axis side to the first connecting portion 211 so that the inner surface 212 of the core unit is pressed against the outer surface 111 side of the annular portion.

[0097] In Example 2, all core units 210 are located outside the annular portion 110.

[0098] In Example 2, the structure of the first connecting portion 211 is not limited, as long as the connector 300 can provide a radial force toward the axis side to the first connecting portion 211, so that the inner surface 212 of the core unit is pressed against the outer surface 111 side of the annular portion. For example, the first connecting portion 211 includes a second connecting hole 2113; the connector 300 is inserted into the second connecting hole 2113; the connector 300 is clamped outside the wall of the second connecting hole 2113 near the axis side and outside the second connecting portion 130. As another example, the first connecting portion 211 includes a second protrusion 2114, and the connector 300 is clamped outside the second protrusion 2114 and the second connecting portion 130.

[0099] In Example 2, the structure of the second connecting part 130 is similar to that of the second connecting part 130 in Example 1 above, and will not be described again here.

[0100] In Example 2, the structure of connector 300 is similar to that of connector 300 in Example 1 above, and will not be described again here.

[0101] As an example, such as Figure 10 As shown, the first connecting portion 211 includes a second connecting hole 2113, and the second connecting portion 130 includes an inner surface 113 of an annular portion. The connector 300 can be a strip-shaped structure. The middle part of the connector 300 can be easily inserted into the second connecting hole 2113. The two ends of the connector 300 are bent and deformed under external force and contact the inner surface 113 of the annular portion, so that the middle part of the connector 300 contacts the surface of the second connecting hole 2113 near the axis. Thus, the inner surface of the iron core unit 210 is pressed tightly against the annular portion by the connector 300. On the outer surface 111 side of the part; here, the connector 300 is clamped outside the wall and the second connecting part 130 on the side of the second connecting hole 2113 near the axis; here, the middle part of the connector 300 can be made to contact the surface of the second connecting hole 2113 near the axis by continuing to deform the contact end of the connector 300 with the inner surface 113 of the annular part; or the middle part of the connector 300 can be made to contact the surface of the second connecting hole 2113 near the axis by inserting a tensioning member between the connector 300 and the inner surface 113 of the annular part.

[0102] As yet another example, such as Figure 11 As shown, the first connecting portion 211 may include a second protrusion 2114, the second connecting portion 130 is the inner surface 113 of the annular portion, and the connector 300 may be a clamp-like structure. The connector 300 is clamped outside the second protrusion 2114 and the annular portion 110, and contacts the surface of the second protrusion 2114 away from the axis and the inner surface 113 of the annular portion, respectively. Here, the connector 300 can be pressed against the second protrusion 2114 by continuing to deform the end of the connector 300 that contacts the inner surface 113 of the annular portion; or the connector 300 can be pressed against the second protrusion 2114 by inserting a tensioning member between the connector 300 and the inner surface 113 of the annular portion.

[0103] In some optional implementations of the embodiments of this application, the annular portion 110 may have a first flange 114 and a second flange 115 at both ends in the axial direction; a portion of the core unit 210 is inserted between the first flange 114 and the second flange 115 so that the two flanges define the position of the core unit 210 in the axial direction of the support 100.

[0104] Of course, in other implementations, the annular portion 110 may not have a flange. Here, the support 100 can limit the position of the core unit 210 in the axial direction of the support 100 by marking lines or other limiting structures.

[0105] In this implementation, when the annular portion 110 includes two annular units 116, the first flange 114 is disposed at one end of one annular unit 116 away from the other annular unit 116; the second flange 115 is disposed at one end of the other annular unit 116 away from the first annular unit 116.

[0106] This application also describes an electric motor, which includes a stator and a rotor according to the present application. The rotor is sleeved outside the stator. By making the distance between the outer surface 215 of at least three iron core units and the axis the same, the outer diameter error of the iron core 200 formed by at least three iron core units 210 can be greatly reduced. This makes the gap between the stator and the rotor more uniform in the circumferential direction, improves the stability of the rotor rotation, and reduces the vibration and noise generated during the operation of the motor.

[0107] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this invention will not be described separately.

[0108] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A stator device, characterized in that, include: The stent has a ring-shaped portion; The iron core consists of at least three individual iron core units; At least three iron core units are arranged radially along the circumference of the annular portion; A groove is provided between two adjacent core units; the core unit has an inner surface facing the axis side; The connector makes the inner surface of the iron core unit fit with the outer surface of the annular part.

2. The stator device according to claim 1, characterized in that, The core unit has a first connecting portion; the bracket has a second connecting portion corresponding to the position of the first connecting portion; the connector is disposed between the first connecting portion and the second connecting portion, and the connector is used to provide a radial force toward the axis side to the first connecting portion.

3. The stator device according to claim 2, characterized in that, The first connecting portion is located inside the annular portion; the second connecting portion is disposed on the side of the first connecting portion away from the axis; the connector is disposed between the first connecting portion and the second connecting portion; the connector contacts the first connecting portion and the connector is used to provide a radial force toward the axis side to the first connecting portion.

4. The stator device according to claim 3, characterized in that, The second connecting portion includes the inner surface of the annular portion; or, The second connecting portion includes a first boss disposed on the end face of the annular portion; or, The second connecting portion includes a second boss disposed on the fixing portion of the bracket.

5. The stator device according to claim 3, characterized in that, The first connecting portion includes a first protrusion, and the connector is inserted between the first protrusion and the second connecting portion; or, The first connecting portion includes a first connecting hole; a first part of the connector is inserted into the first connecting hole and contacts the surface of the first connecting hole near the axis; a second part of the connector is located between the first connecting hole and the second connecting portion.

6. The stator device according to claim 3, characterized in that, The annular portion has at least three openings along its circumference, and the first connecting portion passes through the openings and is located inside the annular portion.

7. The stator device according to claim 3, characterized in that, The portion of the connector located between the first connecting part and the second connecting part can be adjusted in length based on external force, so that the connector contacts the first connecting part and the second connecting part respectively; or... The stator assembly further includes a tensioning member, at least a portion of which is inserted between the second connecting portion and the connecting member, such that the tensioning member contacts the second connecting portion and the connecting member respectively.

8. The stator device according to claim 2, characterized in that, The first connecting portion is located on the outside of the annular portion; the second connecting portion is disposed on the side of the first connecting portion near the axis; the connector is disposed between the first connecting portion and the second connecting portion; the connector contacts the first connecting portion and is used to provide a radial force toward the axis side to the first connecting portion.

9. The stator device according to claim 8, characterized in that, The first connecting portion includes a second protrusion, and the connector is sandwiched between the second protrusion and the second connecting portion; or, The first connecting portion includes a second connecting hole; the connector is inserted into the second connecting hole; the connector is clamped between the wall of the second connecting hole near the axis and the second connecting portion.

10. The stator device according to claim 2, characterized in that, The core unit has at least two spaced-apart first connecting portions in the axial direction, and the connector is disposed between the at least two first connecting portions and the second connecting portion.

11. The stator device according to claim 2, characterized in that, The annular portion has two adjacent annular units arranged in the axial direction; the iron core unit has two spaced first connecting portions at both ends in the axial direction, and the positions of the two first connecting portions correspond to the positions of the two annular units. The bracket has two second connecting parts that correspond to the positions of the two first connecting parts, respectively; The connector is disposed between the two first connecting parts and the two second connecting parts.

12. The stator device according to any one of claims 1 to 11, characterized in that, The outer surface of the annular portion is the outermost surface of the annular portion in the circumferential direction; The outer surface of the annular portion is formed by a circle extending axially, and the inner surface of the iron core unit is an arc surface; or, the inner surface of the iron core unit is a plane, and the area in contact between the outer surface of the annular portion and the inner surface of the iron core unit is a plane.

13. The stator device according to any one of claims 1 to 11, characterized in that, The annular portion has a first flange and a second flange at both ends in the axial direction; a portion of the iron core unit is inserted between the first flange and the second flange.

14. The stator device according to any one of claims 1 to 11, characterized in that, The outer surface of the iron core unit is an arc surface, and the bracket also has a fixing part located in the space defined by the annular part, and the fixing part has a third connecting hole in the axial direction. The stator assembly further includes: The conductor is at least partially wound around the toothed grooves of the iron core unit; The shaft is partially fitted into the third connecting hole.

15. An electric motor, characterized in that, It includes the stator assembly and rotor as described in any one of claims 1 to 14, wherein the rotor is sleeved outside the stator assembly.

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