Busbar structure, stator assembly and motor

Abstract

The invention provides a busbar structure, a stator assembly and a motor. The busbar structure comprises an annular supporting frame, a W-phase copper bar, a V-phase copper bar and a U-phase copper bar, each of the W-phase copper bar, the V-phase copper bar and the U-phase copper bar comprises a main body part, a three-phase power supply connecting part and an enameled wire wiring part. The main body part is accommodated in the support frame, and the three-phase power supply connecting part protrudes out of the support frame. The three-phase power supply connecting part is provided with a wiring groove for accommodating a three-phase power line, and the wiring groove is used for contacting with the three-phase power line. According to the bus bar structure, the wiring groove is formed in the three-phase power supply connecting part, so that the three-phase power line and the three-phase power supply connecting part are in direct contact and are electrically connected, a switching element is omitted, and the size of the bus bar structure in the axial direction is small.

Description

Technical Field

[0001] The present application relates to the field of motors, and in particular to a busbar structure, a stator assembly and a motor. Background Art

[0002] With the continuous development of motor technology, many different types of busbar structures have appeared on the market. As a medium connecting the motor winding and the power line, the main function of the busbar structure is to collect and distribute current to achieve low resistance and efficient current transmission to ensure stable operation of the motor. However, in the existing busbar structure, a connecting part must be set to be electrically connected to the adapter terminal first, and the adapter terminal is then welded and fixed to the three-phase power line. Setting the adapter terminal on the support frame will result in a large number of parts and the axial space of the busbar structure is too large.

[0003] Therefore, it is necessary to provide an improved busbar structure, stator assembly and motor to solve the above problems. Summary of the invention

[0004] The present application provides a busbar structure, a stator assembly and a motor with a relatively small axial size.

[0005] The present application provides a busbar structure, comprising an annular support frame and a W-phase copper busbar, a V-phase copper busbar and a U-phase copper busbar which are stacked, wherein the W-phase copper busbar, the V-phase copper busbar and the U-phase copper busbar each comprise a main body, a three-phase power connection portion and an enameled wire connection portion; the main body is accommodated in the support frame, the three-phase power connection portion protrudes out of the support frame, and the three-phase power connection portion is provided with a connection groove for accommodating a three-phase power line for contacting the three-phase power line.

[0006] Furthermore, the main body is stacked in the axial direction and is mounted on the same circular ring as the support frame; the enameled wire connection portion is coplanar with the main body and extends radially from the main body.

[0007] Furthermore, the three-phase power supply connection part includes a cutting edge arranged in the wiring groove, which is used to pierce the three-phase power supply line; the enameled wire wiring part is provided with a wiring cutting edge, which is used to pierce the enameled wire; the wiring groove and the wiring cutting edge are U-shaped, V-shaped or Y-shaped.

[0008] Furthermore, the main bodies of the W-phase copper bar, the V-phase copper bar and the U-phase copper bar partially overlap in the circumferential direction; the main bodies are respectively provided with mutually aligned positioning holes at the overlapping parts, for providing axial and radial positioning for the W-phase copper bar, the V-phase copper bar and the U-phase copper bar.

[0009] Furthermore, the main bodies of the W-phase copper bar, the V-phase copper bar and the U-phase copper bar partially overlap in the circumferential direction; two positioning holes are respectively provided on the main bodies; and forming holes aligned with the positioning holes are respectively provided on the support frame.

[0010] Furthermore, the three-phase power supply connection part includes an extension piece, a connecting piece and a bending piece, the extension piece is connected to the main body and extends radially along the support frame, the connecting piece extends circumferentially from the extension piece, the bending piece extends from the connecting piece, and the bending piece and the connecting piece surround the wiring groove.

[0011] Furthermore, the busbar structure also includes a bridge plate, which is stacked with the W-phase copper busbar, the V-phase copper busbar and the U-phase copper busbar; the bridge plate includes a main body located in the support frame and a bridge plate connection portion protruding from the support frame; the bridge plate connection portion and the enameled wire connection portion are respectively located on the inner and outer sides of the support frame.

[0012] Furthermore, a cutting edge is provided on the wiring portion of the bridge plate for piercing the enameled wire and electrically connecting with the enameled wire; a bridge plate positioning hole is provided on the main body of the bridge plate for providing axial and radial positioning for the bridge plate.

[0013] Furthermore, it also includes a common ground copper bar, which is arranged below the W-phase copper bar, the V-phase copper bar and the U-phase copper bar; the common ground copper bar includes a main body arranged in the support frame and a common ground copper bar wiring portion protruding out of the support frame, and the common ground copper bar wiring portion is provided with a common ground copper bar cutting edge for piercing the enameled wire and electrically connecting to the enameled wire.

[0014] Furthermore, a plurality of common ground copper bar positioning holes are provided on the main body of the common ground copper bar, and the common ground copper bar positioning holes are aligned with the positioning holes of the W-phase copper bar, the V-phase copper bar and the U-phase copper bar, so as to provide axial and radial positioning for the common ground copper bar.

[0015] Furthermore, the support frame, the W-phase copper bar, the V-phase copper bar, the U-phase copper bar and the bridge plate are integrally injection-molded, and snap fasteners distributed at intervals are formed on the outer peripheral wall of the support frame.

[0016] The present application also provides a stator assembly, including a stator core, a stator frame, an enameled wire group and the above-mentioned bus structure, wherein the stator core is fixed to the radial outer side of the stator frame, the enameled wire group is wound in the winding slot of the stator frame, and the bus structure is fixed to the end of the stator frame.

[0017] The present application provides a wiring groove on the three-phase power connection part, so that the three-phase power line is accommodated in the wiring groove and directly contacts and electrically connects with the three-phase power connection part, thereby eliminating the conversion element between the three-phase power line and the three-phase power connection part, so that the bus structure has a smaller size in the axial direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of a busbar structure according to an exemplary embodiment of the present application.

[0019] Figure 2 yes Figure 1 The schematic diagram of the busbar structure shown is not provided with a support frame.

[0020] Figure 3 yes Figure 2 The busbar structure shown is a schematic diagram of the busbar structure being assembled with the positioning posts before being formed with the support frame.

[0021] Figure 4 yes Figure 2 The top view of the W-phase copper busbar of the busbar structure is shown.

[0022] Figure 5 yes Figure 2 Schematic diagram of the W-phase copper busbar of the busbar structure shown.

[0023] Figure 6 yes Figure 2 The top view of the V-phase copper busbar of the busbar structure is shown.

[0024] Figure 7 yes Figure 2 The top view of the U-phase copper busbar of the busbar structure is shown.

[0025] Figure 8 yes Figure 2 A top view of the bridge plate of the busbar structure is shown.

[0026] Fig. 9 yes Figure 2 The top view of the common ground copper busbar of the busbar structure is shown.

[0027] Fig.10 is a schematic diagram of a stator assembly according to an exemplary embodiment of the present application.

[0028] Description of Figure Numbers

[0029] 100, stator core; 200, stator frame; 201, winding groove; 300, enameled wire group; 10, support frame; 11, forming hole; 12, buckle; 13, positioning column; 20, W phase copper busbar; 21, main body; 211, first positioning hole; 22, three-phase power connection; 221, wiring groove; 222, extension piece; 223, connecting piece; 224, bending piece; 23, enameled wire connection; 231, wiring edge; 30, V phase copper busbar; 31, main body; 311, second positioning hole; 32, three-phase power connection; 321, wiring groove; 322, extension piece; 323, connecting piece Plate; 324, bending plate; 33, enameled wire connection part; 331, connection edge; 40, U-phase copper busbar; 41, main body; 411, third positioning hole; 42, three-phase power connection part; 421, connection slot; 422, extension plate; 423, connecting plate; 424, bending plate; 43, enameled wire connection part; 431, connection edge; 50, bridge plate; 51, main body; 511, bridge plate positioning hole; 52, bridge plate connection part; 521, bridge plate edge; 60, common ground copper busbar; 61, main body; 611, common ground copper busbar positioning hole; 62, common ground copper busbar connection part; 621, common ground copper busbar edge. DETAILED DESCRIPTION

[0030] Here, the technical solutions in the embodiments (or "implementations") of the present application will be described clearly and completely in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0031] If there are terms involving directional indications or positional relationships in the embodiments of the present application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, the terms "first", "second", etc. involved in the embodiments of the present application are only used for the purpose of convenience of description and cannot be understood as indicating or implying relative importance.

[0032] See also Figures 1 to 3 As shown, the present application provides a busbar structure, including an annular support frame 10, a W-phase copper bar 20, a V-phase copper bar 30, a U-phase copper bar 40, a bridge plate 50 and a common copper bar 60. The W-phase copper bar 20, the V-phase copper bar 30 and the U-phase copper bar 40 are stacked with the bridge plate 50. The common copper bar 60 is arranged below the W-phase copper bar 20, the V-phase copper bar 30 and the U-phase copper bar 40.

[0033] The support frame 10 is integrally injection molded with the W-phase copper bar 20, the V-phase copper bar 30, the U-phase copper bar 40 and the bridge plate 50. The support frame 10 is provided with a forming hole 11, which is used for heat dissipation when the bus structure is working. The outer peripheral wall of the support frame 10 is formed with spaced fasteners 12 to facilitate the bus structure to be clamped on the stator assembly, thereby reducing assembly time.

[0034] According to the implementation of the present application, the support frame 10 can be made of heat-resistant engineering plastics such as PBT (polybutylene terephthalate), PPS (polyphenylene sulfide), etc., to increase the service life of the support frame 10.

[0035] Please also see Figures 4 to 7 As shown, the W-phase copper busbar 20 includes a main body 21, a three-phase power connection part 22 and an enameled wire connection part 23. The V-phase copper busbar 30 includes a main body 31, a three-phase power connection part 32 and an enameled wire connection part 33. The U-phase copper busbar 40 includes a main body 41, a three-phase power connection part 42 and an enameled wire connection part 43.

[0036] The main bodies 21, 31, 41 are all accommodated in the support frame 10. The main bodies 21, 31, 41 are stacked in the axial direction. The main bodies 21, 31, 41 and the support frame 10 are arranged on the same ring. The main bodies 21, 31, 41 partially overlap in the circumferential direction. The main bodies 21, 31, 41 are respectively provided with mutually aligned positioning holes at the overlapping parts, which are used to provide axial and radial positioning for the W-phase copper bar 20, the V-phase copper bar 30 and the U-phase copper bar 40.

[0037] According to the embodiment of the present application, the main bodies 21, 31, and 41 partially overlap in the circumferential direction, that is, the main body 21 partially overlaps with the main body 31 in the circumferential direction, the main body 31 partially overlaps with the main body 41 in the circumferential direction, and the main body 21 partially overlaps with the main body 41 in the circumferential direction. The positioning holes include a first positioning hole 211 provided on the main body 21, a second positioning hole 311 provided on the main body 31, and a third positioning hole 411 provided on the main body 41. At least two of the first positioning hole 211, the second positioning hole 311, and the third positioning hole 411 are provided. Any two of the first positioning hole 211, the second positioning hole 311, and the third positioning hole 411 are aligned.

[0038] One of the first positioning holes 211 and one of the second positioning holes 311 at the overlapping portion of the main body 21 and the main body 31 are aligned with one of the third positioning holes 411 at the overlapping portion of the main body 31 and the main body 41 along the thickness direction of the bus structure. Another first positioning hole 211 and another third positioning hole 411 at the overlapping portion of the main body 21 and the main body 41 are aligned with the thickness direction of the bus structure.

[0039] According to the embodiment of the present application, the number of first positioning holes 211 is five, the number of second positioning holes 311 is four, and the number of third positioning holes 411 is five. The first positioning holes 211 are evenly spaced along the circumference of the main body 21, the second positioning holes 311 are evenly spaced along the circumference of the main body 31, and the third positioning holes 411 are evenly spaced along the circumference of the main body 41.

[0040] Before injection molding with the support frame 10, a positioning column 13 needs to be set to fix the relative positions of the W-phase copper bar 20, the V-phase copper bar 30 and the U-phase copper bar 40. When the W-phase copper bar 20, the V-phase copper bar 30 and the U-phase copper bar 40 overlap each other, the positioning column 13 can be assembled into any two of the first positioning hole 211, the second positioning hole 311 and the third positioning hole 411. The structure of the positioning column 13 is a stepped shaft, which is used to control the axial spacing between each copper bar and radially position each bus copper bar to ensure that the stacking position of each copper bar is correct when the support frame 10 is injection molded. After the injection molding is completed, the positioning column 13 is removed. After the positioning column 13 is removed, a forming hole 11 is retained on the support frame 10, and the forming hole 11 is aligned with the first positioning hole 211, the second positioning hole 311 and the third positioning hole 411 along the thickness direction of the bus.

[0041] According to the implementation of the present application, the positioning column 13 can be made of metal materials such as copper, aluminum or alloy.

[0042] The three-phase power connection parts 22, 32, 42 protrude out of the support frame 10. The three-phase power connection parts 22, 32, 42 are provided with wiring grooves 221, 321, 421 for accommodating the three-phase power lines. The three-phase power connection part 22 includes an extension piece 222, a connecting piece 223 and a bending piece 224. The extension piece 222 extends from the main body 21 along the radial direction of the support frame 10. The connecting piece 223 extends from the extension piece 222 along the circumferential direction of the support frame 10. The bending piece 224 is bent and extended from the connecting piece 223. The bending piece 224 and the connecting piece 223 surround a wiring groove 221. The three-phase power connection part 22 also includes a cutting edge provided in the wiring groove 221, which is used to pierce the three-phase power line and directly contact the three-phase power line.

[0043] The three-phase power connection part 32 includes an extension piece 322, a connection piece 323 and a bending piece 324. The extension piece 322 is connected to the main body 31 and extends from the main body 31 along the radial direction of the support frame 10. The connection piece 323 extends from the extension piece 222 along the circumferential direction of the support frame 10. The bending piece 324 is bent and extended from the connection piece 323. The bending piece 324 and the connection piece 323 surround a wiring groove 321. The three-phase power connection part 32 also includes a blade provided in the wiring groove 321, which is used to pierce the three-phase power line and directly contact the three-phase power line.

[0044] The three-phase power supply connection part 42 includes an extension piece 422, a connection piece 423 and a bending piece 424. The extension piece 422 is connected to the main body 41 and extends from the main body 41 along the radial direction of the support frame 10. The connection piece 423 extends from the extension piece 422 along the circumferential direction of the support frame 10. The bending piece 424 is bent and extended from the connection piece 423. The bending piece 424 and the connection piece 423 surround a wiring groove 421. The three-phase power supply connection part 42 also includes a blade provided in the wiring groove 421, which is used to pierce the three-phase power line and directly contact the three-phase power line.

[0045] The enameled wire connection part 23 is coplanar with the main body 21. The enameled wire connection part 23 extends radially from the main body 21. The enameled wire connection part 23 is located on the outer peripheral wall of the main body 21. Two enameled wire connection parts 23 are provided. Along the circumferential direction of the main body 21, the two enameled wire connection parts 23 are both provided on the same side of the three-phase power supply connection part 22.

[0046] The enameled wire connection part 33 is coplanar with the main body 31. The enameled wire connection part 33 extends radially from the main body 31. The enameled wire connection part 33 is located on the outer peripheral wall of the main body 31. Two enameled wire connection parts 33 are provided. Along the circumferential direction of the main body 31, the two enameled wire parts 33 are provided on both sides of the three-phase power supply connection part 32.

[0047] The enameled wire connection part 43 is coplanar with the main body 41. The enameled wire connection part 43 extends radially from the main body 41. The enameled wire connection part 43 is located on the outer peripheral wall of the main body 41. Two enameled wire connection parts 43 are provided. Along the circumferential direction of the main body 41, the two enameled wire connection parts 43 are both provided on the same side of the three-phase power supply connection part 42.

[0048] The enameled wire connection parts 23, 33, 43 are provided with connection cutting edges 231, 331, 431 for piercing the enameled wire and electrically connecting with the enameled wire. The connection grooves 221, 321, 421 and the connection cutting edges 231, 331, 431 are U-shaped, V-shaped or Y-shaped to adapt to the wire diameters of different enameled wires and three-phase power lines, so as to facilitate the storage and clamping of the enameled wires and three-phase power lines and improve the connection efficiency.

[0049] According to other embodiments of the present application, the cutting edge of the wiring slot and the wiring cutting edge of the enameled wire wiring portion may not be a cutting edge but a serrated structure to pierce the enameled wire or the three-phase power line.

[0050] In some embodiments, the blade can be designed in various forms, for example, single-edged, double-edged or multi-edged to adapt to different types of enameled wires and three-phase power lines. In addition, the blade can be made of a high-hardness alloy material to improve its durability and puncture effect.

[0051] like Figure 8As shown, the bridge plate 50 includes a main body 51 located in the support frame 10 and a bridge plate wiring portion 52 protruding from the support frame 10. A bridge plate positioning hole 511 is provided on the main body 51 of the bridge plate 50, and the bridge plate positioning hole 511 is aligned with the first positioning hole 211, the second positioning hole 311 and the third positioning hole 411. The positioning column 13 is assembled into the bridge plate positioning hole 511 and the first positioning hole 211, the second positioning hole 311 and the third positioning hole 411 to provide axial and radial positioning for the bridge plate 50. The bridge plate wiring portion 52 and the enameled wire wiring portions 23, 33, and 43 are respectively located on the inner and outer sides of the support frame 10. A bridge plate cutting edge 521 is provided on the bridge plate wiring portion 52 for piercing the enameled wire and electrically connecting with the enameled wire.

[0052] According to the implementation mode of the present application, when the winding mode of the enameled wire is single-connected winding, multiple bridge plates 50 are required to be provided as jumper conductors to connect the copper bars. The bridge plate 50 is in the shape of a copper bar and is inserted into the axial stacking gap of the W-phase copper bar 20, the V-phase copper bar 30 and the U-phase copper bar 40, so that the axial dimension of the busbar structure is more compact and the integration of the busbar structure is high. In addition, when the winding mode of the enameled wire is double-connected winding, the connection between the copper bars is achieved by reversing the winding end, and there is no need to provide a bridge plate 50.

[0053] In the embodiment of the present application, six bridge plates 50 are provided, and the six bridge plates 50 are concentric circles and evenly spaced apart and distributed in the support frame 10 .

[0054] See also Fig. 9 As shown, the common copper bar 60 is annular, and the common copper bar 60 includes a main body 61 disposed in the support frame 10 and a common copper bar wiring portion 62 protruding out of the support frame 10. A plurality of common copper bar positioning holes 611 are provided on the main body 61 of the common copper bar 60. The common copper bar positioning holes 611 are aligned with the first positioning hole 211, the second positioning hole 311 and the third positioning hole 411. The positioning column 13 can be assembled into the common copper bar positioning holes 611 and the first positioning holes 211, the second positioning holes 311 and the third positioning holes 411, and is used to provide axial and radial positioning for the common copper bar 60. A common copper bar cutting edge 621 is provided on the common copper bar wiring portion 62, which is used to pierce the enameled wire and electrically connect to the enameled wire.

[0055] According to the implementation of the present application, the common copper bus 60 provides an equipotential connection so that each copper bus and bridge board connected to the common copper bus 60 will not generate current due to the potential difference, thereby improving the safety of the bus structure.

[0056] In the embodiment of the present application, two common ground copper bus positioning holes 611 are provided opposite to each other, and six common ground copper bus wiring portions 62 are provided.

[0057] According to the implementation mode of the present application, the bridge plate edge 521 and the common copper busbar edge 621 are U-shaped, V-shaped or Y-shaped to adapt to the wire diameters of different enameled wires, facilitate the storage and clamping of the enameled wires, and improve the wiring efficiency.

[0058] See also Fig.10 As shown, the present application also provides a stator assembly, including a stator core 100, a stator frame 200, an enameled wire group 300 and the above-mentioned bus structure, the stator core 100 is fixed to the radial outer side of the stator frame 200, the enameled wire group 300 is wound in the winding groove 201 of the stator frame 200, and the bus structure is fixed to the end of the stator frame 200 by a snap-fit ​​12.

[0059] The present application also provides a motor, comprising the above-mentioned stator assembly. According to an embodiment of the present application, the motor is a servo motor.

[0060] The present application provides a wiring slot on the three-phase power connection part so that the three-phase power line is in direct contact and electrically connected with the three-phase power connection part, thereby eliminating the switching element and making the busbar structure smaller in axial dimension. At the same time, a cutting edge is provided on the wiring slot and the enameled wire connection part so that the cutting edge can clamp and directly pierce the three-phase power line and the enameled wire, which helps to reduce the wire stripping and paint removal operations and improve the wiring efficiency. In addition, a bridge plate is provided in the stacking gap of each copper busbar to make the axial dimension of the busbar structure more compact.

[0061] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without causing conflicts. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the drawings; all modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of this application should be included in the scope of protection of this application.

Claims

1. A busbar structure, characterized in that: It comprises an annular support frame and a W-phase copper bar, a V-phase copper bar and a U-phase copper bar which are stacked, wherein the W-phase copper bar, the V-phase copper bar and the U-phase copper bar each comprise a main body, a three-phase power connection part and an enameled wire connection part; the main body is accommodated in the support frame, the three-phase power connection part protrudes out of the support frame, and the three-phase power connection part is provided with a connection groove for accommodating a three-phase power line for contacting the three-phase power line.

2. The busbar structure according to claim 1, characterized in that: The main body is stacked along the axial direction and is arranged on the same circular ring as the support frame; the enameled wire connection part is coplanar with the main body and extends radially from the main body.

3. The busbar structure according to claim 1, characterized in that: The three-phase power supply connection part includes a cutting edge arranged in the wiring groove, which is used to pierce the three-phase power supply line; the enameled wire wiring part is provided with a wiring cutting edge, which is used to pierce the enameled wire; the wiring groove and the wiring cutting edge are U-shaped, V-shaped or Y-shaped.

4. The busbar structure according to claim 1, characterized in that: The main bodies of the W-phase copper bar, the V-phase copper bar and the U-phase copper bar are partially overlapped in the circumferential direction; the main bodies are respectively provided with mutually aligned positioning holes at the overlapping parts, for providing axial and radial positioning for the W-phase copper bar, the V-phase copper bar and the U-phase copper bar.

5. The busbar structure according to claim 4, characterized in that: The main bodies of the W-phase copper bar, the V-phase copper bar and the U-phase copper bar overlap in two parts in the circumferential direction; two positioning holes are respectively provided on the main bodies; and forming holes are respectively aligned with the positioning holes on the support frame.

6. The busbar structure according to claim 1, characterized in that: The three-phase power supply connection part includes an extension piece, a connecting piece and a bending piece. The extension piece is connected to the main body and extends radially along the support frame. The connecting piece extends circumferentially from the extension piece along the support frame. The bending piece is bent and extended from the connecting piece. The bending piece and the connecting piece surround the wiring groove.

7. The busbar structure according to claim 1, characterized in that: The busbar structure also includes a bridge plate, which is stacked with the W-phase copper busbar, the V-phase copper busbar and the U-phase copper busbar; the bridge plate includes a main body located in the support frame and a bridge plate connection portion protruding from the support frame; the bridge plate connection portion and the enameled wire connection portion are respectively located on the inner and outer sides of the support frame.

8. The busbar structure according to claim 7, characterized in that: The bridge plate connection part is provided with a cutting edge for piercing the enameled wire and electrically connecting with the enameled wire; the main body of the bridge plate is provided with a bridge plate positioning hole for providing axial and radial positioning for the bridge plate.

9. The busbar structure according to claim 4, characterized in that: It also includes a common ground copper bar, which is arranged below the W-phase copper bar, the V-phase copper bar and the U-phase copper bar; the common ground copper bar includes a main body arranged in the support frame and a common ground copper bar wiring portion protruding out of the support frame, and the common ground copper bar wiring portion is provided with a common ground copper bar cutting edge for piercing the enameled wire and electrically connecting to the enameled wire.

10. The busbar structure according to claim 9, characterized in that: A plurality of common copper bar positioning holes are provided on the main body of the common copper bar, and the common copper bar positioning holes are aligned with the positioning holes of the W-phase copper bar, the V-phase copper bar and the U-phase copper bar to provide axial and radial positioning for the common copper bar.

11. The busbar structure according to claim 7, characterized in that: The support frame, the W-phase copper bar, the V-phase copper bar, the U-phase copper bar and the bridge plate are integrally injection-molded, and snap fasteners distributed at intervals are formed on the outer peripheral wall of the support frame.

12. A stator assembly, characterized in that: It comprises a stator core, a stator frame, an enameled wire group and a bus structure as described in any one of claims 1 to 11, wherein the stator core is fixed to the radial outer side of the stator frame, the enameled wire group is wound in the winding slots of the stator frame, and the bus structure is fixed to the end of the stator frame.

13. A motor, characterized in that: Comprising the stator assembly as claimed in claim 12, the motor is a servo motor.

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