Motor stator and motor

Abstract

Embodiments of the present disclosure relate to a stator of a motor and a motor. The stator includes: a plurality of stator poles arranged around a central axis and coupled to each other; a stator winding including a plurality of coils respectively wound on the plurality of stator poles, the plurality of coils being electrically connected to each other near the axial ends of the plurality of stator poles and forming a plurality of connection portions; and an annular member disposed at the axial ends of the plurality of stator poles and coupled to the plurality of stator poles, the annular member together with the plurality of stator poles enclosing a space for constraining the plurality of connection portions. The scheme of the present disclosure can reduce the outer dimensions of the motor stator in a simple and efficient manner.

Description

Technical Field

[0001] The present disclosure relates to the technical field of motors, and more particularly, to a stator of a motor and a motor having the stator. Background Art

[0002] The stator is an important part of the motor. As the stator of the motor, the energized stator winding can be used to generate a rotating magnetic field that interacts with the rotor; as the stator of the generator, the stator winding can interact with the rotor magnetic field to output electricity. The stator winding can usually be composed of multiple coils or coil groups. In motors such as servo motors, multiple coils or coil groups in the stator winding can be connected to each other through appropriate wiring. The wiring method, wiring arrangement, and wiring fixing method in the stator winding may not only affect the manufacturing cost of the motor, but also affect the axial design length of the motor.

[0003] For example, for small servo motors, the tendency is to weld the stator windings to the circuit board, thereby eliminating the need to fix the stator terminal ends. However, this method often results in poor welding and is not suitable for larger motors. For example, for larger servo motors, the stator windings can be wired using terminal crimping. However, when using the terminal crimping method, there are many problems associated with the fixation of the stator winding terminal ends, such as how to effectively reduce the height of the terminal ends to reduce the axial length of the motor, and how to quickly, simply and efficiently fix the terminal ends. Currently, there is a lack of effective means to solve these problems. Summary of the invention

[0004] The embodiments of the present disclosure provide a stator of a motor and a motor including the stator, which can effectively reduce the axial length of the motor stator to shorten the total axial length of the motor and reduce the manufacturing cost of the motor.

[0005] According to one aspect of the present disclosure, a stator of a motor is provided, which includes: a plurality of stator poles arranged around a central axis and coupled to each other; a stator winding including a plurality of coils respectively wound on the plurality of stator poles, the plurality of coils being electrically connected to each other near axial ends of the plurality of stator poles and forming a plurality of connection portions; and an annular member disposed at the axial ends of the plurality of stator poles and coupled to the plurality of stator poles, the annular member together with the plurality of stator poles enclosing a space for constraining the plurality of connection portions.

[0006] In certain embodiments of the present disclosure, the stator further includes: a snap mechanism, and the annular member is coupled to the plurality of stator poles via the snap mechanism.

[0007] In certain embodiments of the present disclosure, the snap-fit ​​mechanism includes a plurality of protrusions respectively arranged on at least some of the plurality of stator poles near the axial end, and a plurality of slots respectively corresponding to the plurality of protrusions arranged on the annular member, each of the plurality of protrusions being engaged in the corresponding slot so that the relative movement between the annular member and the plurality of stator poles is restricted.

[0008] In certain embodiments of the present disclosure, the plurality of slots include closed slots and open slots arranged along the circumference of the annular member, the closed slots being configured to block the corresponding protrusions from entering and leaving the closed slots, and the open slots being configured not to block the corresponding protrusions from entering and leaving the open slots.

[0009] In certain embodiments of the present disclosure, each protrusion has a protrusion height that gradually decreases along the direction toward the axial end, so that each protrusion is easy to enter the closed groove on the ring member and difficult to leave the closed groove on the ring member.

[0010] In certain embodiments of the present disclosure, each stator pole is a separate stator block and includes an iron core and an insulating frame arranged on the iron core, multiple coils are respectively wound on the corresponding insulating frames, and the protrusions are arranged on the insulating frame and protrude from the insulating frame in a radial direction.

[0011] In certain embodiments of the present disclosure, the annular member includes: an annular end face, perpendicular to the central axis; an outer wall surface, extending from the outer radial edge of the annular end face toward multiple stator poles in a direction parallel to the central axis, and the slot is arranged on the outer wall surface and penetrates the outer wall surface along the radial direction; and an inner wall surface, extending from the inner radial edge of the annular end face toward multiple stator poles in a direction parallel to the central axis.

[0012] In certain embodiments of the present disclosure, at least one hole for observing the plurality of connecting parts is provided on the annular end surface.

[0013] In certain embodiments of the present disclosure, the outer wall surface and the inner wall surface of the ring are respectively provided with an outer opening and an inner opening for connecting the stator winding to an external circuit.

[0014] According to a second aspect of the present disclosure, there is provided an electric motor, comprising: a rotor; and a stator according to the first aspect of the present disclosure.

[0015] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and other objects, features and advantages of the present disclosure will become more apparent through a more detailed description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present disclosure.

[0017] Figure 1 A schematic structural diagram of a stator of a motor according to an embodiment of the present disclosure is shown;

[0018] Figure 2 A partial perspective view of a stator after removing a ring according to an embodiment of the present disclosure is shown;

[0019] Figure 3 shows a partial cross-sectional view of a stator according to an embodiment of the present disclosure;

[0020] Figure 4 A perspective view of a stator pole wound with a stator coil according to an embodiment of the present disclosure is shown;

[0021] Figure 5A A perspective view showing a ring according to an embodiment of the present disclosure; and

[0022] Figure 5B A cross-sectional view of a ring according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0023] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present disclosure more thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. Those skilled in the art can obtain alternative technical solutions from the following description without departing from the spirit and scope of protection of the present disclosure.

[0024] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". Other explicit and implicit definitions may also be included below.

[0025] The present disclosure proposes an improved motor stator structure. In this motor stator structure, a ring-shaped member for fixing the winding at the end of the stator is provided, and this ring-shaped member can constrain the dispersed connection parts between the coils in the space between the ring-shaped member and the stator pole, thereby effectively reducing the peripheral size of the motor stator, especially the axial length. In addition, the ring-shaped member can be fixed to the stator pole in an efficient and reliable manner, so it has the advantages of simple structure and easy installation.

[0026] Figure 1 1 shows a schematic diagram of the structure of the stator 100 of the motor according to an embodiment of the present disclosure. As an example, the stator 100 may have a substantially annular shape and may be an outer stator. Thus, the inner rotor may be disposed on the inner side of the stator 100. However, it is understood that the stator 100 may also be other types of stators, for example, the stator 100 may also be an inner stator, and thus the outer rotor may be disposed on the outer side of the stator 100.

[0027] According to the embodiments of the present disclosure, Figure 1 As shown, the stator 100 may include a plurality of stator poles 110 arranged around a central axis X and coupled to each other.

[0028] Specifically, the stator body composed of a plurality of stator poles 110 is an important part of the motor magnetic circuit, and may include a magnetic conductive part composed of a magnetic conductive material to form a magnetic flux path. In addition, the plurality of stator poles 110 may also include an insulating part for mounting an excitation coil or winding to separate the excitation coil or winding from the magnetic conductive part. The stator body may be formed in one piece or may be a split structure. In the case of a split structure, a plurality of stator poles 110 may be joined together in an appropriate manner. For example, each stator pole 110 may be provided with a joint at a position close to an adjacent stator pole, and joined with an adjacent stator pole, and examples of such joints may include a positioning groove or a positioning protrusion. For example, the stator pole 110 may have a positioning groove, and its adjacent stator pole 110 may have a positioning protrusion, so that when the stator pole 110 is coupled with the adjacent stator pole, the positioning groove of the stator pole 110 may be engaged with the positioning protrusion of the adjacent stator pole, thereby reliably fixing the two adjacent stator poles 110 together. However, it can be understood that adjacent stator poles 110 may be coupled in any other appropriate manner so as to be sequentially connected to form an annular stator body.

[0029] The central axis X around which the plurality of stator poles 110 are disposed may be located at the center of the stator 100 and may be, for example, the rotation axis of the motor rotor. The direction parallel to the central axis X may be referred to as the axial direction, and the direction along the radius or diameter of a circle centered on the central axis X may be referred to as the radial direction.

[0030] Figure 2 Shows removal Figure 1 A partial three-dimensional view of the stator 100 after the ring member 130 in FIG. Figure 1 and Figure 2 For further explanation.

[0031] According to an embodiment of the present disclosure, the stator 100 may include a stator winding 120, which may include a plurality of coils 121 respectively wound around a plurality of stator poles 110. The plurality of coils 121 are electrically connected to each other near axial ends of the plurality of stator poles 110 and form a plurality of connection portions 122.

[0032] Specifically, the stator winding 120 arranged on the plurality of stator poles 110 constitutes the circuit part of the stator and can be connected to an external circuit (such as a drive circuit, a brake circuit and a power supply network). The stator winding 120 can be a three-phase winding, or a winding with any other number of phases. Each phase winding can generally be composed of a plurality of interconnected windings, and there may also be certain interconnections between the phase windings. These interconnections should follow the stator circuit design so as to achieve a specific circuit structure in the stator winding. Specifically, as Figure 2 As shown, a plurality of coils 121 may be respectively wound on a plurality of stator poles 110. For example, each coil 121 may be wound on a stator pole 110 in a one-to-one correspondence, or each coil 121 may be wound on a plurality of stator poles 110. In order to realize a certain circuit design in the stator winding, a plurality of coils 121 may be connected at the axial ends of the stator poles 110, thereby forming a plurality of connection portions 122. Such connection at the axial ends may be a terminal crimping method, for example, crimping together by cold-rolled terminals.

[0033] However, in this connection mode, these connecting parts 122 are dispersedly arranged on the outside of the stator pole 110. If these connecting parts 122 are not fixed in any way, then these dispersedly arranged connecting parts 122 will greatly increase the size of the motor (especially the axial length). At the same time, it can be seen that these connecting parts 122 are distributed almost on the entire circumference of the stator body and have different extension lengths. Therefore, if multiple connecting parts 122 are fixed separately in sequence (for example, a single connecting part 122 is fixed by some means to limit its axial height), then the fixing efficiency will be very low and the reliability will be poor.

[0034] Figure 3 FIG. 1 shows a partial cross-sectional view of a stator 100 according to an embodiment of the present disclosure. Figure 1 and Figure 3 for further description.

[0035] According to an embodiment of the present disclosure, the stator 100 may include an annular member 130 , which may be disposed at an axial end of the plurality of stator poles 110 and coupled to the plurality of stator poles 110 , and the annular member 130 may enclose a space A together with the plurality of stator poles 110 for constraining the plurality of connection portions 122 .

[0036] Specifically, the ring 130 disposed at the end of the stator can be coupled to all or part of the stator poles 110, so that a space A can be formed between the ring 130 and the stator pole 110, and a plurality of connecting portions 122 can be constrained in the space A. Obviously, the ring 130 can press or confine the plurality of connecting portions 122 in the space A, thereby preventing the connecting portions 122 from bouncing up and extending beyond the inner diameter of the stator, and effectively reducing the peripheral dimensions of the stator (e.g., axial length and radial length). In addition, since the ring 130 can constrain all the connecting portions 122 on the circumference of the stator end in the space A at the same time, the use of the ring 130 can effectively improve the fixing efficiency of the connecting portions 122 compared to the traditional method.

[0037] In certain embodiments of the present disclosure, Figure 1 As shown, the stator 100 may further include a snap mechanism 140. The annular member 130 may be coupled to the plurality of stator poles 110 via the snap mechanism 140. Specifically, by snapping, the annular member 130 and the plurality of stator poles 110 may be quickly and simultaneously fixed relatively at a plurality of positions (i.e., the plurality of stator poles 110) after contacting each other. In addition, the snap mechanism also has the advantages of being easy to implement and having high reliability. It is understandable that although Figure 1 An exemplary snap-fit ​​mechanism 140 is shown in FIG. 1 , but any other suitable snap-fit ​​mechanism may be provided in the stator 100 .

[0038] Figure 4 A perspective view of a stator pole 110 around which a stator coil 121 is wound is shown. Figure 5A A perspective view of the ring 110 is shown, and Figure 5B A cross-sectional view of the ring 110 is shown. Figure 1 , Figure 3 , Figure 4 ,as well as Figure 5A and 5B For further explanation.

[0039] In certain embodiments of the present disclosure, the snap mechanism 140 may include a plurality of protrusions 141 respectively arranged on at least part of the stator poles 110 near the axial end, and may include a plurality of slots 1421, 1422 respectively corresponding to the plurality of protrusions 141 and arranged on the ring member 130; each of the plurality of protrusions 141 is engaged in the corresponding slot 1421, 1422 so that the relative movement between the ring member 130 and the plurality of stator poles 110 is restricted.

[0040] like Figure 1 , Figure 3 as well as Figure 4 As shown, each stator pole 110 may be provided with a protrusion 141, and the position of these protrusions 141 may be close to the axial end to facilitate engagement with the ring member 130. Figure 1 , Figure 3 as well as Figure 5A and 5B As shown, the ring member 130 may be provided with a plurality of latching grooves 1421 and 1422 , and the latching grooves 1421 and 1422 are located at positions corresponding to the plurality of protrusions 141 so as to be aligned and engaged with the protrusions 141 .

[0041] When the ring 130 moves in the axial direction close to the stator body including the plurality of stator poles 110, the slots 1421 and 1422 of the ring 130 can be aligned with the protrusions 141 of the stator poles 110. As the slots 1421 and 1422 are snapped together with the protrusions 141, the ring 130 and the plurality of stator poles 110 can no longer perform relative movement including axial and radial directions. At the same time, when the ring 130 is coupled to the stator pole 110, the plurality of connection portions 122 can be pressed or constrained, thereby confining the connection portions 122 in the space A between the ring 130 and the plurality of stator poles 110.

[0042] In some embodiments of the present disclosure, the plurality of slots 1421, 1422 include closed slots 1421 and open slots 1422 alternately arranged along the circumference of the ring 130. The closed slots 1421 are configured to block the corresponding protrusions 141 from entering and leaving the closed slots 1421. The open slots 1422 are configured not to block the corresponding protrusions 141 from entering and leaving the open slots 1422.

[0043] Specifically, the card slots 1421 and 1422 may include two types of card slots, namely Figure 1 as well as Figure 5A and 5BThe first type of slot 1421 and the second type of slot 1422 are shown, and they can include multiple slots respectively. The slot 1421 is a closed slot, which can block the protrusion 141 from entering the slot to a certain extent during the buckle process. However, once this blocking effect is overcome, the protrusion 141 will enter the slot and be reliably fixed in the slot (in other words, the slot 1421 can block the protrusion 141 from leaving the slot). Different from this, the slot 1422 is an open slot, which has an open structure. This means that in the process of the ring 130 being coupled to the stator pole 110, the protrusion 141 can enter the slot 1422 unimpeded. At the same time, when the ring 130 is detached from the stator pole 110, the protrusion 141 can also leave the slot 1422 unimpeded. It should be noted that although the structure of the slot 1422 does not block the protrusion 141 from entering or leaving the slot during the coupling and decoupling process between the ring member 130 and the multiple stator poles 110, the slot 1422 still has a limiting effect on the protrusion 141. For example, the slot 1422 can limit the movement of the protrusion 141 in the slot 1422 in a direction different from the installation direction of the ring member 130 (for example, a circumferential direction), thereby still helping to fix the ring member 130 and the multiple stator poles 110.

[0044] By providing a partially open card slot 1422, the installation resistance encountered when the ring 130 is installed on multiple stator poles 130 can be reduced, and the installation can be completed using less force, thereby effectively reducing the difficulty of installation. At the same time, since the card slots 1421 and 1422 are alternately arranged along the circumferential direction of the ring 130, the installation resistance can be made more uniform, and the ring can still be ensured to be firmly coupled to the stator pole while reducing the installation resistance. However, it should be understood that in other embodiments, the open card slots 1422 and the closed card slots 1421 may not be alternately arranged, for example, two or more adjacent card slots may be open card slots 1422, or two or more adjacent card slots may be closed card slots 1421, and such an arrangement can also reliably connect the ring 130 to the stator pole 110.

[0045] In certain embodiments of the present disclosure, each protrusion 141 may have a protrusion height that gradually decreases along the direction toward the axial end, so that each protrusion 141 can easily enter the closed groove 1421 on the ring member 130 and is difficult to leave the closed groove 1421 on the ring member 130.

[0046] Specifically, as described above, during the coupling or installation of the ring member 130 to a plurality of stator poles 110, the closed slot 1421 will block the protrusion 141 from entering the slot to a certain extent. In order to reduce this installation resistance, the protrusion 141 can be designed as a protrusion with a variable height, and the height of the protrusion can gradually increase from a position close to the axial end to a position away from the axial end. Thereby, the closed slot 1421 can be guided to engage with the protrusion 141 during the installation of the ring member 130. At the same time, after the snap-in process is completed, since the protrusion 141 has a higher protrusion height at a position away from the axial end, this enables the protrusion 141 to be firmly engaged in the closed slot 1421 and is not easy to fall out. As an example, if Figure 3 As shown, the protrusion 141 may have a triangular cross section, and this triangular cross section can guide the edge of the closed card slot 1421 to slide along the inclined surface of the protrusion 141 and complete the final snap connection, and the right angle side of the triangular cross section enables the protrusion 141 to be firmly engaged in the card slot 1421. It can be understood that the protrusion 141 may also have other cross-sectional shapes with different heights, as long as this cross-sectional shape can effectively guide the card slot to be accessed and ensure the stable installation of the card slot.

[0047] In an embodiment of the present disclosure, each stator pole 110 may be a separate stator block, and each stator pole 110 may include an iron core 112 and an insulating frame 113 disposed on the iron core 112, a plurality of coils 121 are respectively wound on corresponding insulating frames 113, and a protrusion 141 may be disposed on the insulating frame 113 and protrude from the insulating frame 113 in a radial direction.

[0048] The stator pole 110 can be a block structure, which makes the winding on the stator pole 110 more convenient and easy to realize automated operation. In the block structure, each stator pole has a separate iron core 112, and each iron core 112 can be stacked by magnetic conductive sheets. However, each iron core 112 can also be formed integrally by magnetic materials, or formed in other ways. The iron cores 112 of adjacent stator poles can be engaged with each other by means such as positioning grooves and positioning protrusions. The insulating frame 113 can be installed on the iron core 112 to facilitate the winding of the coil 121 and insulate and separate the iron core 112 and the coil 121. As an example, the insulating frame 113 can be installed on the iron core 112 by casting or injection molding, so as to achieve effective fixation of the insulating frame 113 and the iron core 112. In order to facilitate the winding of the coil 121, the insulating frame 113 can be provided with a wire slot portion suitable for winding the coil 121, and can also be provided with a baffle portion to prevent the coil 121 from moving laterally (or radially). The protrusion 141 may be disposed on the insulating frame 113 and radially protrude from the insulating frame 113. For example, the protrusion 141 may be disposed on the baffle portion on the radially outer side of the insulating frame 113. However, the protrusion 141 may also be formed on other portions of the insulating frame 113. The protrusion 141 may be formed integrally with the insulating frame 113, for example, the protrusion 141 may be formed as a whole with the insulating frame 113 during injection molding or casting. In addition, the protrusion 141 may also be mounted and fixed to the insulating frame 113 as a separate component in any appropriate manner.

[0049] It is understandable that the protrusion 141 can also be formed on the core portion of the stator pole 110. For example, the protrusion 141 can be arranged on the radial outer side of the core, whereby the protrusion 141 can be a part of the radial outer side of the core 112, or the protrusion 141 can also be a separate component and fixed to the radial outer side of the core 112 in a certain manner. However, compared with being arranged on the core 112, the protrusion 141 arranged on the insulating frame 113 has a better technical effect, because the insulating frame 113 is closer to the stator end, making it easier to install. In addition, since the insulating frame is generally formed by injection molding or casting, it is relatively easy to form a protrusion 141 with a specific shape on the insulating frame 113, and the protrusion 141 formed thereby will be more stable.

[0050] In addition, the protrusion 141 may also protrude from the insulating frame 113 in other directions. However, compared with other directions, the protrusion 141 protruding from the insulating frame 113 along the radial direction can effectively limit the axial movement of the ring 130, thereby being more conducive to the installation and fixation of the ring 130.

[0051] In certain embodiments of the present disclosure, Figure 5A and Figure 5BAs shown, the annular member 130 may include an annular end face 131, an outer side wall face 132 and an inner side wall face 133. The annular end face 131 is perpendicular to the central axis X. The outer side wall face 132 extends from the outer radial edge of the annular end face 131 toward the plurality of stator poles 110 in a direction parallel to the central axis X, and the slots 1421 and 1422 are arranged on the outer side wall faces 132 and 133 and penetrate the outer side wall face 132 in the radial direction. The inner side wall face 133 extends from the inner radial edge of the annular end face 131 toward the plurality of stator poles 110 in a direction parallel to the central axis X.

[0052] The annular end surface 131, the outer wall surface 132 and the inner wall surface 133 of the annular member 130 are enclosed on the ends of the plurality of stator poles 110, and thus form a space A for accommodating and constraining the plurality of connecting parts 122. The annular end surface 131 can limit the extension of the plurality of connecting parts 122 in the axial direction, and the outer wall surface 132 and the inner wall surface 133 can constrain the extension of the plurality of connecting parts 122 in the radial direction. Thus, the plurality of connecting parts 122 can be restricted or constrained in a smaller limited space, which effectively reduces the peripheral size of the motor stator.

[0053] The slots 1421 and 1422 may be openings on the outer wall surface 132, and the shape of the opening may be, for example, a rectangle. A plurality of protrusions 141 pass through the outer wall surface 132 in the radial direction through the slots 1421 and 1422, thereby clamping the ring member 130 in the entire circumferential direction of the stator end, thereby effectively limiting the relative movement between the ring member 130 and a plurality of stator poles 110. It is understandable that the slots 1421, 1422 may also be formed on the inner wall surface of the ring member 130, and thus the protrusion 141 may form the radial inner side of the stator pole 110. However, in comparison, it is more advantageous to arrange the snap mechanism on the radial outer side, because the radial outer side has a longer circumferential boundary, and more protrusions and slot combinations may be provided, thereby providing a better installation effect by engaging on the radial outer side.

[0054] In certain embodiments of the present disclosure, at least one hole 1311 for observing the plurality of connecting portions 122 is provided on the annular end surface 131. Specifically, in order to facilitate observation of the winding condition in the space A of the annular member 130, at least one hole 1311 may be provided. Thus, the arrangement and connection of the connecting portions 122 inside the annular member 130 may be observed without detaching the annular member 130 from the plurality of stator poles 110, so as to facilitate subsequent processing by the operator.

[0055] In certain embodiments of the present disclosure, the outer wall surface 132 and the inner wall surface 133 of the ring 130 are respectively provided with an outer opening 135 and an inner opening 136 for connecting the stator winding 120 to an external circuit. Specifically, the provision of inner and outer outlet openings can meet the different requirements of the motor structure. For example, for a motor without a brake, it is more convenient to use the inner outlet, while for a motor with a brake, the outer outlet can be used. Therefore, the ring 130 provided with both the inner opening and the outer opening can be applicable to more different motor structures and therefore has a wider range of applications.

[0056] In the solution disclosed in the present invention, by providing an annular member at the end of the stator, the axial length of the motor stator can be effectively reduced, thereby shortening the total axial length of the motor. The annular member has a simple structure, low cost and is easy to install, which can reduce the manufacturing cost of the motor.

[0057] According to another embodiment of the present disclosure, a motor is provided, which may include a stator 100 and a rotor. As an example, the motor may be a servo motor. Due to the use of the stator 100, only low cost and simple and convenient installation operations are required, and the peripheral size of the motor (especially the axial length of the motor) can be effectively reduced.

[0058] Through the teachings given in the above description and the related drawings, many modifications and other embodiments of the present disclosure given here will be recognized by those skilled in the art of the present disclosure. Therefore, it is to be understood that the embodiments of the present disclosure are not limited to the specific embodiments disclosed, and modifications and other embodiments are intended to be included in the scope of the present disclosure. In addition, although the above description and the related drawings describe the example embodiments in the context of some example combinations of parts and / or functions, it should be appreciated that different combinations of parts and / or functions can be provided by alternative embodiments without departing from the scope of the present disclosure. In this regard, for example, other combinations of parts and / or functions that are different from those clearly described above are also expected to be within the scope of the present disclosure. Although specific terms are used here, they are only used in a general and descriptive sense and are not intended to be limited.

Claims

1. A stator (100) of an electric motor, include: A plurality of stator poles (110) arranged around a central axis (X) and coupled to each other; A stator winding (120) comprising a plurality of coils (121) respectively wound around the plurality of stator poles (110), the plurality of coils (121) being electrically connected to each other near axial ends of the plurality of stator poles (110) and forming a plurality of connection portions (122); an annular member (130) disposed at the axial ends of the plurality of stator poles (110) and coupled to the plurality of stator poles (110), the annular member (130) and the plurality of stator poles (110) together enclosing a space (A) for constraining the plurality of connection portions (122); and a snap mechanism (140), wherein the annular member (130) is coupled to the plurality of stator poles (110) via the snap mechanism (140), The buckle mechanism (140) comprises a plurality of protrusions (141) respectively arranged on at least some of the stator poles (110) near the axial end, and a plurality of slots (1421, 1422) respectively corresponding to the plurality of protrusions (141) and arranged on the annular member (130), each of the plurality of protrusions (141) being engaged in a corresponding slot (1421, 1422) so that relative movement between the annular member (130) and the plurality of stator poles (110) is restricted. The multiple slots (1421, 1422) include a closed slot (1421) and an open slot (1422) arranged along the circumference of the annular member (130), the closed slot (1421) being configured to block the corresponding protrusion (141) from entering and leaving the closed slot (1421), and the open slot (1422) being configured not to block the corresponding protrusion (141) from entering and leaving the open slot (1422).

2. The stator (100) according to claim 1, wherein each protrusion (141) has a protrusion height that gradually decreases along the direction toward the axial end, so that each protrusion (141) can easily enter the closed groove (1421) on the annular member (130) and is difficult to leave the closed groove (1421) on the annular member (130).

3. The stator (100) according to claim 1 or 2, wherein each stator pole (110) is a separate stator block and comprises an iron core (112) and an insulating frame (113) arranged on the iron core (112), the plurality of coils (121) are respectively wound on the corresponding insulating frames (113), and the protrusion (141) is arranged on the insulating frame (113) and protrudes from the insulating frame (113) in a radial direction.

4. The stator (100) according to claim 1 or 2, wherein the annular member (130) include: an annular end surface (131), wherein the annular end surface (131) is perpendicular to the central axis (X); an outer wall surface (132) extending from an outer radial edge of the annular end surface (131) toward the plurality of stator poles (110) in a direction parallel to the central axis (X), the slots (1421, 1422) being arranged on the outer wall surface (132) and penetrating the outer wall surface (132) in a radial direction; and An inner wall surface (133) extends from an inner radial edge of the annular end surface (131) toward the plurality of stator poles (110) in a direction parallel to the central axis (X).

5. The stator (100) according to claim 4, wherein at least one hole (1311) for observing the plurality of connection portions (122) is provided on the annular end surface (131).

6. The stator (100) according to claim 4, wherein the outer wall surface (132) and the inner wall surface (133) of the annular member (130) are respectively provided with an outer opening (135) and an inner opening (136) for connecting the stator winding (120) to an external circuit.

7. A motor, include: Rotor; as well as A stator (100) according to any one of claims 1 to 6.

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