A motor assembly, a motor stator and an in-wheel motor

Abstract

The application discloses a motor assembly, a motor stator and a wheel hub motor, and relates to the technical field of motors. The motor assembly is not only convenient for winding the stator winding, but also is beneficial to improving the efficiency of the motor. The motor assembly comprises a stator support, a stator tooth and a connecting assembly. The stator support has a fixing portion. The stator tooth has a winding portion and a connecting portion. The winding portion is used for winding the stator winding. The connecting portion is matched with the fixing portion. A plurality of stator teeth are respectively abutted with the fixing portion through the connecting portions along the circumferential direction of the stator support. The connecting portions are fixedly connected with the fixing portion through the connecting assembly. The motor assembly provided by the application is used in a motor.

Description

Technical Field

[0001] This application relates to the field of motor technology, and in particular to a motor assembly, a motor stator, and a hub motor. Background Technology

[0002] The stator is a crucial component of an electric motor. Its primary function is to generate a rotating magnetic field. The stator typically comprises the motor assembly and stator windings, which are formed by multiple turns of wire wound within the slots of the stator. The structure of the motor assembly significantly impacts the winding of the stator windings. In some technologies, stators that are difficult to wind can negatively affect the motor's efficiency. Utility Model Content

[0003] This application provides a motor assembly, a motor stator, and a hub motor, which not only facilitates the winding of the stator windings but also helps to improve the efficiency of the motor.

[0004] The first aspect of this application provides a motor assembly comprising: a stator bracket, stator teeth, and a connecting assembly. The stator bracket has a fixing portion; the stator teeth have a winding portion and a connecting portion, the winding portion being used to wind stator windings, the connecting portion matching the fixing portion, and multiple stator teeth abutting against the fixing portion via their respective connecting portions along the circumference of the stator bracket; each connecting portion is fixedly connected to the fixing portion via the connecting assembly.

[0005] The motor assembly provided in this application, due to the fixing part provided on the stator bracket, can provide an installation position for the stator teeth. Furthermore, a winding part is provided on the stator teeth, facilitating the winding of the stator winding onto the stator teeth. The connecting part of the stator teeth and the fixing part are fixedly connected by a connecting assembly, which helps improve the reliability and stability of the connection between the stator teeth and the stator bracket. Compared to related technologies where the stator teeth and stator bracket are integrated, the limited space between adjacent stator teeth makes winding the stator winding inconvenient. Using the motor assembly provided in this application, when winding the stator winding wires onto the stator support, the stator winding can be performed on each individual stator tooth first. After the stator winding is completed, the stator teeth with the windings are then fixedly mounted on the stator support using connecting components. This allows the stator winding wires to be arranged regularly on the stator teeth, thus making full use of the space between adjacent stator teeth, which is beneficial for improving the slot fill factor of the motor stator. Consequently, it achieves the goal of increasing motor power and efficiency within the same volume. Therefore, the motor assembly provided in this application not only facilitates the winding of the stator windings but also helps to improve motor efficiency.

[0006] In one possible implementation of this application, the fixing part includes at least two protruding rings extending circumferentially on the stator support, the at least two protruding rings being distributed along the axial direction of the stator support; along the axial direction, the connecting part is located between the at least two protruding rings.

[0007] In the technical solution of this application, since the fixing part includes at least two convex rings, a space for accommodating the connecting part can be formed between the at least two convex rings, so that the connecting part of the stator tooth can be clamped between the at least two convex rings, which facilitates fixing the connecting part and the convex rings through the connecting assembly.

[0008] In one possible implementation of this application, the connecting part has a first through hole that matches the connecting component, the first through hole extending axially through the connecting part, and the protruding ring has a second through hole that matches the connecting component; at least a portion of the connecting component passes through the first through hole and the second through hole to fix the connecting part and the fixing part together.

[0009] In the technical solution of this application, since a first through hole is provided on the connecting part and a second through hole is provided on the convex ring, it is convenient to pass a part of the connecting component through the first through hole and the second through hole, and then abut the other part of the connecting component against the convex ring, so that the stator teeth can be fixedly installed on the stator bracket through the connecting component.

[0010] In one possible implementation of this application, the axis of the first through hole is located within the plane of symmetry of the stator teeth.

[0011] In the technical solution of this application, since the axis of the first through hole is located in the plane of symmetry of the stator teeth, after the stator teeth are fixed on the stator bracket by the connecting assembly, the parts on both sides of the connecting part located on the first through hole abut against the stator bracket along the circumference of the stator bracket, and the distance between these two parts and the first through hole is basically the same. This allows the parts on both sides of the connecting part located on the first through hole to be subjected to a support force of basically the same magnitude, which is beneficial to improving the stability of the stator teeth installed on the stator bracket.

[0012] In one possible implementation of this application, the connecting component includes a positioning member and a fastener. A first through hole matches the positioning member. A portion of the convex ring has a second through hole that matches the positioning member, and another portion of the convex ring has a second through hole that matches the fastener. The positioning member passes through the second through hole and the first through hole, and one end of the positioning member abuts against a convex ring. The fastener is sleeved on the other end of the positioning member, with a portion of the fastener passing through the second through hole and the other portion abutting against another convex ring.

[0013] In the technical solution of this application, since the connecting component includes a positioning element and a fastener, the positioning element can pass through the first through hole and the second through hole to limit and fix the stator teeth and the stator support. The fastener can be fixedly connected to the positioning element, thereby fixing the positioning element to the stator support. This not only facilitates fixing the stator teeth and the stator support, but also facilitates installing the connecting component on the stator support.

[0014] In one possible implementation of this application, the fastener is interference-fitted with the second through hole; along the radial direction of the stator support, the fastener abuts against the positioning member on the side away from the center of the stator support, the positioning member abuts against the first through hole on the side near the center of the stator support, and the connecting part and the fixing part abut against each other under the action of the connecting assembly.

[0015] In the technical solution of this application, since the fastener and the second through hole are interference-fitted, and the fastener and the positioning part abut against each other on the side away from the center of the stator support, and the positioning part and the first through hole abut against each other on the side close to the center of the stator support, along the radial direction of the stator support, the connecting part of each stator tooth can be tightly attached to the stator support, which can reduce the risk of the stator tooth wobbling relative to the stator support, which is beneficial to improving the reliability of the stator tooth fixing, and can make the outer end of each stator tooth away from the stator support as close as possible to the same virtual circle, which is beneficial to reducing the assembly error of the stator tooth along the radial direction of the stator support.

[0016] In one possible implementation of this application, the edge of the second through hole on the convex ring has a boss along the axial direction, and the positioning member has a blocking protrusion that presses the fastener against the boss along the axial direction; or, the blocking protrusion presses the fastener against the convex ring along the axial direction.

[0017] In the technical solution of this application, since a boss is provided on the edge of the second through hole on the convex ring, the thickness of the convex ring can be increased by the boss, which can also increase the length of the second through hole. This is beneficial to increase the contact area between the fastener and the second through hole, and can also increase the contact area between the positioning component and the second through hole, thereby improving the reliability of the connection between the connecting component and the stator support.

[0018] In one possible implementation of this application, positioning holes are provided on both sides of the connecting part along the circumferential direction, and positioning pins are provided in the corresponding positioning holes on two adjacent stator teeth.

[0019] In the technical solution of this application, since a positioning pin is provided between two adjacent stator teeth, multiple stator teeth can be connected circumferentially along the stator bracket by multiple positioning pins in sequence, thereby making multiple stator teeth form a ring-shaped integral structure, which is beneficial to improving the stability and firmness of the stator teeth installation.

[0020] In one possible implementation of this application, along the circumferential direction, the two sides of the connecting part have matching grooves and protrusions respectively, and the protrusions on two adjacent stator teeth are located in the grooves.

[0021] In the technical solution of this application, since matching grooves and protrusions are provided on the stator teeth, multiple stator teeth can be connected sequentially along the circumference of the stator support through the grooves and protrusions, thereby making multiple stator teeth form a ring-shaped integral structure, which is beneficial to improving the stability and firmness of the stator teeth installation.

[0022] A second aspect of this application provides a motor stator, which includes: a stator winding and a motor assembly provided in any of the above embodiments. Each stator tooth has a stator winding portion.

[0023] The motor stator provided in this application includes the motor assembly provided in any of the first aspects above. Therefore, the conductors of the stator winding can be arranged regularly on the stator teeth, so that the space between adjacent stator teeth can be fully utilized, which is beneficial to improving the slot fill factor of the motor stator, and thus can achieve the purpose of increasing the motor power and efficiency in the same volume.

[0024] A third aspect of this application provides a hub motor, the hub electrode comprising: a motor rotor and a motor stator as described in the above embodiments. The stator bracket has a shaft hole, through which the stator bracket is fixedly connected to the vehicle body; the motor rotor is coaxially arranged with the stator bracket and is used to mount a tire.

[0025] The hub motor provided in this application includes the motor stator provided in the second aspect above. Therefore, the conductors of the stator winding can be arranged regularly on the stator teeth, so that the space between adjacent stator teeth can be fully utilized, which is conducive to improving the slot fill factor of the motor stator. In this way, the purpose of increasing the motor power and efficiency under the same volume can be achieved, which is conducive to increasing the driving range of the vehicle. Attached Figure Description

[0026] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the motor stator provided in this application;

[0028] Figure 2 An exploded structural diagram of the motor stator provided in this application;

[0029] Figure 3 Schematic diagram of the cross-sectional structure of the motor stator provided in this application Figure 1 ;

[0030] Figure 4 Schematic diagram of the cross-sectional structure of the motor stator provided in this application Figure 2 ;

[0031] Figure 5 This is a schematic diagram of the stator support structure in the motor stator provided in this application;

[0032] Figure 6 A schematic diagram of the stator teeth in the motor stator provided in this application;

[0033] Figure 7 A schematic diagram of the stator winding in the motor stator provided in this application;

[0034] Figure 8 A schematic diagram of the positioning component in the motor stator provided in this application;

[0035] Figure 9 A schematic diagram of the fasteners in the motor stator provided in this application;

[0036] Figure 10 Provided for this application Figure 2 A magnified view of part A in the middle;

[0037] Figure 11 This is an assembly diagram of the motor stator provided in this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1-Stator bracket; 11-Fixing part; 111-Protruding ring; 112-Second through hole; 113-Boss; 12-Shaft hole; 13-Spoke part; 14-Bracket rim; 2-Stator tooth; 21-Winding part; 22-Connecting part; 23-Limiting part; 221-First through hole; 24-Symmetry plane; 25-Positioning hole; 3-Connecting assembly; 31-Positioning element; 311-Blocking protrusion; 32-Fastener; 321-Third through hole; 4-Stator winding; 5-Shaft; C-Circumferential; Y-Radial; Z-Axial. Detailed Implementation

[0040] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of this application, technical terms such as "first," "second," and "third" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0045] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0046] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0047] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0048] The motor assembly of an external rotor motor is typically a ring-shaped unit with multiple slots designed on the outer side. Wires are wound into these slots to form the stator windings. The wires are generally circular in cross-section to facilitate winding within the slots. During winding, because the wires enter the slots from the slot openings on the outside of the motor assembly (the slot openings are usually designed to be relatively small due to magnetic field distribution limitations), this can easily lead to irregular wire arrangement within the slots and create empty spaces, resulting in low slot utilization (low slot fill factor), which in turn affects motor performance (especially efficiency).

[0049] This application provides a motor assembly that not only facilitates the winding of the stator windings but also helps improve the efficiency of the motor. (Refer to...) Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6 , Figure 1 This is a schematic diagram of the structure of the motor stator provided in this application. Figure 2 This is an exploded view of the motor stator provided in this application. Figure 3 Schematic diagram of the cross-sectional structure of the motor stator provided in this application Figure 1 , Figure 4 Schematic diagram of the cross-sectional structure of the motor stator provided in this application Figure 2 , Figure 5 This is a schematic diagram of the stator support structure in the motor stator provided in this application. Figure 6 This is a schematic diagram of the stator teeth in the motor stator provided in this application.

[0050] The motor assembly provided in this application includes: a stator bracket 1, stator teeth 2, and a connecting assembly 3. The stator bracket 1 has a fixing part 11; the stator teeth 2 have a winding part 21 and a connecting part 22. The winding part 21 is used to wind a stator winding 4, and the connecting part 22 matches the fixing part 11. Along the circumferential direction C of the stator bracket 1, multiple stator teeth 2 abut against the fixing part 11 through their respective connecting parts 22; each connecting part 22 is fixedly connected to the fixing part 11 through the connecting assembly 3.

[0051] In this embodiment, the stator bracket 1 is used to support and mount the stator teeth 2. After the stator windings 4 are mounted on the stator teeth 2, a motor stator can be formed. For example, the stator bracket 1 can be made of materials such as iron, steel, or aluminum alloy. The stator bracket 1 can be configured as a disc-shaped structure, with a shaft hole 12 provided at the center of the disc-shaped stator bracket 1, so that the stator bracket 1 can be mounted on a device or apparatus using the motor assembly through the shaft hole 12.

[0052] For example, a fixing part 11 can be provided on the circumferential C surface of the disc-shaped stator support 1 to install a plurality of stator teeth 2. The fixing part 11 may include a plurality of structures for installing stator teeth 2, and the structure for installing stator teeth 2 on the fixing part 11 matches a portion of the structure of stator teeth 2.

[0053] In this embodiment, the stator teeth 2 are used to wind the stator assembly. A winding portion 21 and a connecting portion 22 can be provided on the stator teeth 2 so that the winding portion 21 winds the stator assembly. The connecting portion 22 is configured to match the fixing portion 11 on the stator support 1, so that the stator teeth 2 are mounted on the stator support 1 via the connecting portion 22 and the fixing portion 11. For example, the stator teeth 2 can be made of materials such as silicon steel or cast iron.

[0054] For example, such as Figure 6 As shown, the stator tooth 2 can be configured with a cross-section approximately "I"-shaped, with the middle portion of the "I"-shaped stator tooth 2 serving as the winding portion 21, that is, the vertical part of the "I" on the stator tooth 2 serving as the winding portion 21. One end of the "I"-shaped stator tooth 2 can serve as the connecting portion 22, that is, the horizontal part of the "I" on the stator tooth 2 serving as the connecting portion 22. In this way, the stator winding 4 can be wound around the winding portion 21, and the stator winding 4 can be limited by the two ends of the "I"-shaped stator tooth 2 to fix the stator winding 4 to the winding portion 21 located in the middle of the stator tooth 2.

[0055] Another example, such as Figure 1 , Figure 2 and Figure 3As shown, multiple stator teeth 2 can be arranged sequentially around the fixing part 11 of the stator support 1 along the circumferential direction C of the stator support 1, so that the connecting part 22 of each stator tooth 2 abuts against the fixing part 11.

[0056] In this embodiment, a connecting component 3 can be used to fix the stator teeth 2 to the fixing part 11 of the stator support 1. For example, the connecting component 3 can be a bolt, with a through hole provided on the fixing part 11 and a threaded hole matching the bolt provided on the connecting part 22. In this way, the connecting part 22 and the fixing part 11 can be fixedly connected by bolts, and multiple stator teeth 2 can be fixed on the stator support 1 to form a motor assembly.

[0057] The motor assembly provided in this application embodiment has a fixing part 11 on the stator bracket 1, which provides an installation position for the stator teeth 2. Furthermore, a winding part 21 is provided on the stator teeth 2, facilitating the winding of the stator winding 4 onto the stator teeth 2. The connecting part 22 of the stator teeth 2 is fixedly connected to the fixing part 11 via a connecting assembly 3, which improves the reliability and stability of the connection between the stator teeth 2 and the stator bracket 1. Compared to related technologies where the stator teeth 2 and the stator bracket 1 are integrated, the limited space between adjacent stator teeth 2 makes it inconvenient to wind the stator winding 4. Using the motor assembly provided in this application embodiment, when winding the conductors of the stator winding 4 onto the stator support 1, the stator winding 4 can be wound onto each individual stator tooth 2 first. After the stator winding 4 is completed, the stator tooth 2 with the stator winding 4 wound onto it is then fixedly mounted onto the stator support 1 via the connecting assembly 3. This allows the conductors of the stator winding 4 to be arranged regularly on the stator tooth 2, thereby fully utilizing the space between adjacent stator teeth 2, which is beneficial for improving the slot fill factor of the motor stator, and thus achieving the goal of increasing motor power and efficiency within the same volume. Therefore, the motor assembly provided in this application embodiment not only facilitates the winding of the stator winding 4 but also helps to improve motor efficiency.

[0058] In some possible embodiments of this application, such as Figure 1 and Figure 5 As shown, the fixing part 11 includes at least two protruding rings 111 extending along the circumferential direction C of the stator support 1 and distributed along the axial direction Z of the stator support 1 on the stator support 1; along the axial direction Z of the stator support 1, the connecting part 22 is located between the at least two protruding rings 111.

[0059] In this embodiment, the stator support 1 can be configured to approximate a wheel hub shape, that is, the stator support 1 includes a disc-shaped spoke portion 13 and an annular support rim 14. The spoke portion 13 can be a flat disc shape, and reinforcing ribs and through holes can be provided on the spoke portion 13 to increase the strength of the spoke portion 13 and reduce its weight. The width direction of the annular support rim 14 is the same as the axial direction Z of the stator support 1. The spoke portion 13 can be disposed inside the support rim 14, and a structure for fixing and connecting the stator teeth 2 can be provided on the circumferential C surface of the support rim 14 to form the stator support 1.

[0060] The spoke portion 13 and the support rim 14 of the stator bracket 1 can be an integral structure (machined from a single piece of material); alternatively, the spoke portion 13, the support rim 14, and the fixing portion 11 can be machined separately and then fixed together by welding or other methods. Figure 2 As shown, the stator support 1 can also be configured as two symmetrical split parts along the Z-axis. For example, the two split parts of the stator support 1 can be formed by stamping, and then the two split parts can be fixed together along the Z-axis by welding, riveting, threaded connection, etc. The specific forming method of the stator support 1 is not limited in the embodiments of this application.

[0061] For example, at least two protruding rings 111 can be provided on the circumferential C-surface of the annular support rim 14 of the stator support 1, and the at least two protruding rings 111 and the circumferential C-surface of the support rim 14 together serve as the fixing part 11. For example, a protruding ring 111 can be provided on each of the two sides (the two sides along the axial direction Z of the stator support 1) of the circumferential C-surface of the support rim 14 of the stator support 1, and the protruding ring 111 can surround the stator support 1 circumferentially C, thus forming an annular groove between the two protruding rings 111 and the support rim 14. Alternatively, three protruding rings 111 can be provided on the circumferential C-surface of the support rim 14 of the stator support 1, and the three protruding rings 111 can be evenly distributed along the axial direction Z of the stator support 1 on the circumferential C-surface of the support rim 14, thus forming two annular grooves between the three protruding rings 111 and the support rim 14.

[0062] In another example, the stator teeth 2 can extend along the axial direction Z of the stator support 1 to clamp the connecting portion 22 of the stator teeth 2 between two protruding rings 111, thereby abutting the connecting portion 22 against the fixing portion 11. Alternatively, if the fixing portion 11 includes three or more protruding rings 111, a groove matching the protruding rings 111 can be provided on the connecting portion 22, so that the protruding rings 111 can be embedded in the groove on the connecting portion 22, thereby clamping the connecting portion 22 of the stator teeth 2 between the two outermost protruding rings 111.

[0063] In the above embodiment, since the fixing part 11 includes at least two protruding rings 111, a space for accommodating the connecting part 22 can be formed between the at least two protruding rings 111, so that the connecting part 22 of the stator tooth 2 can be clamped between the at least two protruding rings 111, making it convenient to fix the connecting part 22 and the protruding rings 111 through the connecting component 3.

[0064] In some possible embodiments of this application, reference is made to Figure 7 , Figure 7 This is a schematic diagram of the stator winding structure in the motor stator provided in this application. The connecting part 22 has a first through hole 221 that matches the connecting assembly 3. The first through hole 221 passes through the connecting part 22 along the axial direction Z of the stator support 1. The convex ring 111 has a second through hole 112 that matches the connecting assembly 3. At least a portion of the connecting assembly 3 passes through the first through hole 221 and the second through hole 112 to fix the connecting part 22 and the fixing part 11 together.

[0065] In the embodiments of this application, such as Figure 5 and Figure 6 As shown, through holes can be provided on the connecting part 22 and the protruding ring 111 to facilitate the installation of the connecting component 3.

[0066] For example, such as Figure 6 and Figure 7 As shown, a first through hole 221 can be provided on the connecting portion 22 of the stator tooth 2. The first through hole 221 extends through the entire connecting portion 22 along the axial direction Z of the stator support 1, and the diameter of the first through hole 221 matches the outer diameter of the connecting assembly 3. A limiting portion 23 can be provided on the winding portion 21 of the stator tooth 2 at one end away from the connecting portion 22 to limit the position of the stator winding 4 on the stator tooth 2. Figure 5 As shown, a second through hole 112 can be provided on the convex ring 111. The second through hole 112 penetrates the convex ring 111 along the axial direction Z of the stator support 1. For example, if the second through hole 112 is provided on both convex rings 111, then each convex ring 111 will have multiple second through holes 112 along the circumferential direction C of the stator support 1. Among them, the two corresponding second through holes 112 on the two convex rings 111 form a set for connection with a set of connecting components 3.

[0067] In another example, connecting component 3 can use matching bolts and nuts, such as Figure 2 As shown, the connecting part 22 can be clamped between the two protruding rings 111, and the first through hole 221 and the second through hole 112 can be aligned. Then, the bolt can be passed through the second through hole 112 and the first through hole 221, and the nut can be fixedly connected to the bolt, thereby fixing each stator tooth 2 on the stator bracket 1.

[0068] In the above embodiment, since a first through hole 221 is provided on the connecting part 22 and a second through hole 112 is provided on the convex ring 111, it is convenient to pass a part of the connecting component 3 through the first through hole 221 and the second through hole 112, and then abut the other part of the connecting component 3 against the convex ring 111, so that the stator tooth 2 can be fixedly installed on the stator bracket 1 through the connecting component 3.

[0069] In some possible embodiments of this application, such as Figure 6 As shown, the axis of the first through hole 221 is located within the plane of symmetry 24 of the stator tooth 2.

[0070] In this embodiment, the stator teeth 2 can be configured as a symmetrical structure along the circumferential direction C of the stator support 1, that is, the stator teeth 2 can be configured as a mirror-symmetrical structure along the symmetry plane 24. The symmetry plane 24 of the stator teeth 2 is a virtual plane that is parallel to the plane containing the axial direction Z and radial direction Y of the stator support 1 and passes through the centerline of the winding portion 21.

[0071] For example, the axis of the first through hole 221 on the connecting part 22 can be located within the symmetry plane 24 of the stator tooth 2, so that the first through hole 221 can be located in the middle position of the connecting part 22 along the circumferential direction C of the stator support 1. Alternatively, the first through hole 221 can be provided on the asymmetry plane 24 of the stator support 1, that is, the axis of the first through hole 221 is not within the symmetry plane 24 of the stator tooth 2.

[0072] In the above embodiment, since the axis of the first through hole 221 is located within the symmetry plane 24 of the stator tooth 2, after the stator tooth 2 is fixed to the stator bracket 1 by the connecting component 3, along the circumferential direction C of the stator bracket 1, the portions of the connecting part 22 located on both sides of the first through hole 221 abut against the stator bracket 1, and the distance between these two portions and the first through hole 221 is basically the same. This allows the portions of the connecting part 22 located on both sides of the first through hole 221 to receive a support force of basically the same magnitude, which is beneficial to improving the stability of the stator tooth 2 installed on the stator bracket 1.

[0073] In some possible embodiments of this application, reference is made to Figure 8 , Figure 9 and Figure 10 , Figure 8 This is a structural schematic diagram of the positioning component in the motor stator provided in this application. Figure 9 This is a schematic diagram of the fasteners in the motor stator provided in this application. Figure 10 Provided for this application Figure 2A partially enlarged schematic diagram of part A. The connecting component 3 includes a positioning member 31 and a fastener 32. A first through hole 221 matches the positioning member 31. A portion of the convex ring 111 has a second through hole 112 that matches the positioning member 31, and another portion of the convex ring 111 has a second through hole 112 that matches the fastener 32. The positioning member 31 passes through the second through hole 112 and the first through hole 221, and one end of the positioning member 31 abuts against one of the convex rings 111. The fastener 32 is sleeved on the other end of the positioning member 31, with a portion of the fastener 32 passing through the second through hole 112 and the other portion abutting against another convex ring 111.

[0074] In this embodiment, the connecting component 3 may use a positioning element 31 and a fastener 32. The positioning element 31 is used to position and fix the stator teeth 2 and the stator support 1, and the fastener 32 is used to fix the positioning element 31 to the stator support 1.

[0075] For example, such as Figure 8 As shown, both the connecting portion 22 of the stator tooth 2 and the convex ring 111 of the stator support 1 have through holes. The positioning member 31 can be a pin that matches the first through hole 221 on the connecting portion 22 and the second through hole 112 on the convex ring 111. A blocking protrusion 311 can be provided at one end of the pin. For example, the blocking protrusion 311 can be set as an annular structure, and the diameter of the blocking protrusion 311 is larger than the diameter of the first through hole 221 and the diameter of the second through hole 112. The pin can be set as a cylinder, and correspondingly, the first through hole 221 can be set as a circular through hole, and the second through hole 112 on the convex ring 111 can be set as a circular through hole that matches the pin; or, the pin can be set as a prism, such as a square prism, pentagonal prism, or hexagonal prism. The connecting part 22 can be clamped between the two protruding rings 111, and the first through hole 221 and the second through hole 112 can be placed in a coaxial position. The pin can be passed through the second through hole 112, the first through hole 221 and the second through hole 112 in sequence, so that the blocking protrusion 311 of the pin abuts against a protruding ring 111. In this way, the stator tooth 2 is fixed and restricted on the stator bracket 1 by the pin, which serves as the positioning member 31.

[0076] Another example, such as Figure 9 As shown, the fastener 32 can be a part that matches the positioning element 31. For example, if the positioning element 31 is a pin, the fastener 32 can be a hollow pin that matches the pin. A third through hole 321 that matches the pin can be provided on the hollow pin, and the second through hole 112 on the convex ring 111 can be set as a circular through hole that matches the hollow pin. Figure 10As shown, the pin can be passed through the second through hole 112 on the convex ring 111, and then the hollow pin can be sleeved on the pin and passed through the second through hole 112 on the convex ring 111. Then, the end of the pin that passes through the hollow pin is riveted to increase the diameter of the pin end, thereby pressing the hollow pin against the convex ring 111, thus fixing the positioning member 31 and the fastener 32 to the stator bracket 1.

[0077] In another example, the positioning element 31 and the fastener 32 can also be matching bolts and nuts. Alternatively, the connecting assembly 3 can also be made of rivets, which are passed through the first through hole 221 and the second through hole 112, and the ends of the rivets are riveted so that the two ends of the rivets abut against the two protruding rings 111 respectively.

[0078] In the above embodiments, since the connecting component 3 includes a positioning member 31 and a fastener 32, the positioning member 31 can pass through the first through hole 221 and the second through hole 112 to limit and fix the stator teeth 2 and the stator support 1. The fastener 32 can be fixedly connected to the positioning member 31, thereby fixing the positioning member 31 to the stator support 1. This not only facilitates the fixing of the stator teeth 2 and the stator support 1, but also facilitates the installation of the connecting component 3 on the stator support 1.

[0079] In some possible embodiments of this application, reference is made to Figure 11 , Figure 11 This is an assembly diagram of the motor stator provided in this application. Figure 10 As shown, the fastener 32 is interference-fitted with the second through hole 112; along the radial Y of the stator support 1, the fastener 32 and the positioning member 31 abut against each other on the side away from the center of the stator support 1, the positioning member 31 and the first through hole 221 abut against each other on the side close to the center of the stator support 1, and the connecting part 22 and the fixing part 11 abut against each other under the action of the connecting assembly 3.

[0080] In this embodiment, the quality of the assembly of the stator teeth 2 and the stator support 1 can be improved by setting the matching relationship between the positioning member 31 and the first through hole 221 on the stator teeth 2, the fastener 32 and the second through hole 112 on the convex ring 111, the positioning member 31 and the fastener 32, and the matching relationship between the connecting part 22 of the stator teeth 2 and the support rim 14 of the stator support 1.

[0081] For example, such as Figure 10 and Figure 11 As shown, when the fastener 32 is inserted into the second through hole 112 on the convex ring 111, the hollow pin, which is the fastener 32, can be press-fitted with the second through hole 112, that is, the outer diameter of the hollow pin is slightly larger than the inner diameter of the second through hole 112, so as to press and fix the hollow pin in the second through hole 112.

[0082] In another example, the positioning member 31 can press the stator tooth 2 against the circumferential C surface of the support rim 14 of the stator support 1 along the radial Y direction of the stator support 1 by setting the positions of the first through hole 221 and the second through hole 112. For example, along the radial Y direction of the stator support 1, the axis of the first through hole 221 on the stator tooth 2 can be closer to the center of the stator support 1 than the axis of the second through hole 112 on the convex ring 111. Thus, after the positioning member 31 passes through the second through hole 112 and the first through hole 221, along the radial Y direction of the stator support 1, the side of the positioning member 31 near the stator winding 4 (the side of the positioning member 31 away from the center of the stator support 1) will press against the wall of the third through hole 321 on the fastener 32, while the side of the positioning member 31 away from the stator winding 4 (the side of the positioning member 31 near the center of the stator support 1) will press against the wall of the first through hole 221 on the stator tooth 2, thereby pressing the connecting part 22 of the stator tooth 2 against the circumferential C surface of the support rim 14 of the stator support 1.

[0083] In another example, the side of the positioning member 31 closest to the stator winding 4 (the side of the positioning member 31 furthest from the center of the stator support 1) can be pressed against the wall of the first through hole 221 on the stator tooth 2, or a gap can be left between the side of the positioning member 31 closest to the stator winding 4 and the wall of the first through hole 221 on the stator tooth 2. Similarly, the side of the positioning member 31 furthest from the stator winding 4 (the side of the positioning member 31 furthest from the center of the stator support 1) can be pressed against the wall of the third through hole 321 on the fastener 32, or a gap can be left between the side of the positioning member 31 furthest from the stator winding 4 and the wall of the third through hole 321 on the fastener 32. Thus, with gaps between the positioning member 31 and the stator tooth 2, and between the positioning member 31 and the fastener 32, assembly of the positioning member 31 and the stator tooth 2, and the positioning member 31 and the fastener 32, is facilitated.

[0084] In the above embodiments, since the fastener 32 is interference-fitted with the second through hole 112, and the fastener 32 abuts against the side of the positioning member 31 away from the center of the stator support 1, and the positioning member 31 abuts against the side of the first through hole 221 close to the center of the stator support 1, along the radial Y of the stator support 1, the connecting part 22 of each stator tooth 2 can be tightly attached to the stator support 1, which can reduce the risk of the stator tooth 2 wobbling relative to the stator support 1, which is beneficial to improving the reliability of fixing the stator tooth 2, and can make the outer end of each stator tooth 2 away from the stator support 1 as close as possible to the same virtual circle, which is beneficial to reducing the assembly error of the stator tooth 2 along the radial Y of the stator support 1.

[0085] In some possible embodiments of this application, such as Figure 10As shown, the edge of the second through hole 112 on the convex ring 111 has a boss 113. Along the axial direction Z of the stator support 1, the positioning member 31 has a blocking protrusion 311. The blocking protrusion 311 presses the fastener 32 against the boss 113 along the axial direction Z; or, the blocking protrusion 311 presses the fastener 32 against the convex ring 111 along the axial direction Z of the stator support 1.

[0086] In this embodiment, a boss 113 can be provided on the convex ring 111 to increase the length of the second through hole 112 on the convex ring 111. For example, along the axial direction Z of the stator support 1, a boss 113 can be provided on the edge of the second through hole 112 on the convex ring 111, and the boss 113 can extend from the convex ring 111 in a direction away from the center of the stator support 1. A boss 113 can be provided on the edge of each second through hole 112 of the two convex rings 111, or a boss 113 can be provided on the edge of the second through hole 112 of the convex ring 111 that abuts against the fastener 32. In this way, after the fastener 32 is sleeved on the positioning member 31 and passes through the second through hole 112, the end of the pin serving as the positioning member 31 can be riveted so that both ends of the pin form blocking protrusions 311. Then, the fastener 32 can be pressed against the boss 113 along the axial direction Z of the stator support 1 by the blocking protrusions 311. When the fastener 32 is inserted into the second through hole 112 without the boss 113, the fastener 32 can be pressed against the boss ring 111 by blocking the protrusion 311 along the axial direction Z of the stator support 1.

[0087] In the above embodiment, since a boss 113 is provided on the edge of the second through hole 112 on the convex ring 111, the thickness of the convex ring 111 can be increased by the boss 113, which can also increase the length of the second through hole 112. This is beneficial to increase the contact area between the fastener 32 and the second through hole 112, and can also increase the contact area between the positioning member 31 and the second through hole 112, thereby improving the reliability of the connection between the connecting assembly 3 and the stator bracket 1.

[0088] In some possible embodiments of this application, such as Figure 6 As shown, along the circumferential direction C of the stator bracket 1, both sides of the connecting part 22 have positioning holes 25, and positioning pins are provided in the corresponding positioning holes 25 on two adjacent stator teeth 2.

[0089] In this embodiment of the application, a positioning hole 25 can be provided on the stator tooth 2, and a positioning pin can be provided in the positioning hole 25 to connect two adjacent stator teeth 2 through the positioning pin.

[0090] For example, such as Figure 6As shown, along the circumferential direction C of the stator support 1, positioning holes 25 can be provided on the connecting portion 22 of the stator teeth 2. For example, the positioning holes 25 can be set as circular blind holes, semi-circular blind holes, or square blind holes, etc. One positioning hole 25 can be provided on each side of the connecting portion 22, and the two positioning holes 25 are located on the same cross section. Along the axial direction Z of the stator support 1, two, three, or four equal numbers of positioning holes 25 can be provided on one side of the connecting portion 22. In this way, a portion of the positioning pin that matches the positioning hole 25 can be inserted into one positioning hole 25 of one stator tooth 2, while the other portion of the positioning pin remains outside the positioning hole 25. Then, another stator tooth 2 is brought close to the positioning pin, and the other portion of the positioning pin is inserted into one positioning hole 25 of another stator tooth 2, thereby connecting two adjacent stator teeth 2 through the positioning pin.

[0091] In the above embodiment, since a positioning pin is provided between two adjacent stator teeth 2, multiple stator teeth 2 can be connected sequentially along the circumferential C of the stator bracket 1 by multiple positioning pins, thereby forming a ring-shaped integral structure, which is beneficial to improving the stability and firmness of the stator teeth 2 installation.

[0092] In some possible embodiments of this application, along the circumferential direction C of the stator support 1, the two sides of the connecting portion 22 have matching grooves and protrusions respectively, and the protrusions on two adjacent stator teeth 2 are located in the grooves.

[0093] In this embodiment, matching protrusions and grooves can be provided on the stator teeth 2 to connect and fix two adjacent stator teeth 2 through the cooperation of the protrusions and grooves.

[0094] For example, along the circumferential direction C of the stator support 1, a protrusion can be provided on one side of the connecting portion 22 of the stator tooth 2, and a groove can be provided on the other side of the connecting portion 22 of the stator tooth 2, with the protrusion and groove on the same stator tooth 2 fitting together. For example, the groove can be a U-shaped groove extending along the axial direction Z of the stator support 1, and the protrusion is a long strip with a U-shaped cross-section. In this way, the protrusions on adjacent stator teeth 2 can be inserted into the groove, so that two adjacent stator teeth 2 are connected by the groove and the protrusion along both the radial direction Y and the circumferential direction C of the stator support 1, thereby connecting all the stator teeth 2 into a ring through the protrusion and the groove.

[0095] In the above embodiments, since matching grooves and protrusions are provided on the stator teeth 2, multiple stator teeth 2 can be connected sequentially along the circumferential direction C of the stator support 1 through the grooves and protrusions, thereby forming a ring-shaped integral structure, which is beneficial to improving the stability and firmness of the installation of the stator teeth 2.

[0096] In addition, this application embodiment also provides a motor stator, which includes: a stator winding 4 and a motor assembly provided in any of the above embodiments. Each stator tooth 2 has a stator winding 4 on its winding portion 21.

[0097] In this embodiment, the stator winding 4 can use a conductor with a circular or approximately rectangular cross-section. For example, the stator winding 4 can use flat enameled wire, such as... Figure 7 As shown, multiple turns of enameled wire can be wound onto the winding portion 21 of the stator tooth 2 to form a stator winding 4 on the stator tooth 2. The stator tooth 2 with the stator winding 4 wound on it is then fixedly mounted on the stator bracket 1, and each stator winding 4 is connected according to a preset wiring sequence to form three drive input terminals of the motor. These three drive input terminals correspond to the U phase, V phase, and W phase of the motor, respectively, thus forming the motor stator.

[0098] The motor stator provided in this application includes the motor assembly provided in any of the above embodiments. Therefore, the conductors of the stator winding 4 can be regularly arranged on the stator teeth 2, so that the space between adjacent stator teeth 2 can be fully utilized, which is beneficial to improving the slot fill factor of the motor stator, and thus can achieve the purpose of increasing the motor power and efficiency in the same volume.

[0099] This application also provides a hub motor, the hub electrode including: a motor rotor and a motor stator provided in the above embodiment. The stator support 1 has a shaft hole 12, and the stator support 1 is fixedly connected to the vehicle body through the shaft hole 12; the motor rotor is coaxially arranged with the stator support 1, and the motor rotor is used to mount the tire.

[0100] In this embodiment of the application, a shaft hole 12 can be provided on the stator support 1 to facilitate the use of a rotating shaft 5 that matches the shaft hole 12, such as... Figure 1 and Figure 2 As shown, the rotating shaft 5 can be passed through the shaft hole 12 and then fixedly connected to the vehicle's suspension system, so that the motor stator can be fixedly installed on the vehicle body.

[0101] For example, a motor rotor that matches the motor stator can be provided. The motor rotor can be configured to mount a tire, that is, a rim and retaining ring can be provided on the motor rotor to fix the tire on the motor rotor. Furthermore, the motor rotor and motor stator can be coaxially arranged so that the motor rotor can be fitted onto the motor stator, allowing the motor rotor to rotate around the motor stator.

[0102] The hub motor provided in this application includes the motor stator provided in the above embodiment. Therefore, the wires of the stator winding 4 can be regularly arranged on the stator teeth 2, so that the space between adjacent stator teeth 2 can be fully utilized, which is beneficial to improving the slot fill factor of the motor stator. In this way, the purpose of increasing the motor power and efficiency under the same volume can be achieved, which is beneficial to increasing the driving range of the vehicle.

[0103] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of the specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way.

Claims

1. A motor assembly, characterized in that, include: A stator support having a fixing part; Stator teeth, each stator tooth having a winding portion and a connecting portion, the winding portion being used to wind a stator winding, the connecting portion being matched with the fixing portion, and along the circumference of the stator support, a plurality of stator teeth abutting against the fixing portion through their respective connecting portions; The connecting components are all fixedly connected to the fixing components.

2. The motor assembly according to claim 1, characterized in that, The fixing portion includes at least two protruding rings extending along the circumferential direction on the stator support, the at least two protruding rings being distributed along the axial direction of the stator support; along the axial direction, the connecting portion is located between the at least two protruding rings.

3. The motor assembly according to claim 2, characterized in that, The connecting part has a first through hole that matches the connecting component, and the first through hole extends through the connecting part along the axial direction. The convex ring has a second through hole that matches the connecting component. At least a portion of the connecting component passes through the first through hole and the second through hole to fix the connecting part and the fixing part together.

4. The motor assembly according to claim 3, characterized in that, The axis of the first through hole is located within the plane of symmetry of the stator tooth.

5. The motor assembly according to claim 3, characterized in that, The connecting assembly includes a positioning element and a fastener. The first through hole matches the positioning element. A portion of the convex ring has a second through hole that matches the positioning element, and another portion of the convex ring has a second through hole that matches the fastener. The positioning element passes through the second through hole and the first through hole, and one end of the positioning element abuts against one of the convex rings. The fastener is sleeved on the other end of the positioning element, with a portion of the fastener passing through the second through hole and another portion abutting against the other convex ring.

6. The motor assembly according to claim 5, characterized in that, The fastener is interference-fitted with the second through hole; along the radial direction of the stator support, the fastener abuts against the positioning member on the side away from the center of the stator support, the positioning member abuts against the first through hole on the side close to the center of the stator support, and the connecting part abuts against the fixing part under the action of the connecting assembly.

7. The motor assembly according to claim 5 or 6, characterized in that, The edge of the second through hole on the convex ring has a boss, and along the axial direction, the positioning member has a blocking protrusion, which presses the fastener against the boss along the axial direction; or, the blocking protrusion presses the fastener against the convex ring along the axial direction.

8. The motor assembly according to any one of claims 1 to 6, characterized in that, Along the circumferential direction, both sides of the connecting part have positioning holes, and positioning pins are provided in the corresponding positioning holes on two adjacent stator teeth.

9. The motor assembly according to any one of claims 1 to 6, characterized in that, Along the circumferential direction, the two sides of the connecting portion have matching grooves and protrusions, and the protrusions on two adjacent stator teeth are located within the grooves.

10. A motor stator, characterized in that, include: The motor assembly according to any one of claims 1 to 9; Stator windings, each of the winding sections is provided with stator windings.

11. A hub motor, characterized in that, include: The motor stator of claim 10, wherein the stator bracket has a shaft hole, and the stator bracket is fixedly connected to the vehicle body through the shaft hole; The motor rotor is coaxially arranged with the stator support and is used to mount the tire.

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