Motor and confluence assembly thereof

Abstract

The invention discloses a motor and a confluence assembly thereof. A first collector ring, a second collector ring and a third collector ring of the collector assembly are arranged on an insulating base body in a mutually stacked mode in the axial direction. And the star point connecting piece of the confluence assembly and at least one confluence ring are arranged at intervals in the radial direction. In other words, by reasonably arranging the star point connecting pieces, the influence of the star point connecting pieces on the overall axial size of the confluence assembly is small, so that the axial size of the confluence assembly can be reduced, and miniaturization design of the motor is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric machines, in particular to an electric machine and a bus assembly thereof. BACKGROUND

[0002] The electric machine applied to hybrid electric vehicles and electric vehicles has a bus ring. The bus ring electrically connects coils of the same phase among a plurality of coils arranged in a circumferential direction on a stator core. However, the overall axial dimension of the bus ring connecting U-phase, V-phase, W-phase and N-phase (neutral point) coils is too large, which is not conducive to the miniaturization design of the electric machine. SUMMARY

[0003] The present application provides an electric machine and a bus assembly thereof, which can reduce the axial dimension of the bus assembly.

[0004] The present application provides a bus assembly of an electric machine. The bus assembly has an axial direction and a radial direction perpendicular to each other. The bus assembly includes an insulating base. The bus assembly further includes a bus ring, the bus ring includes a first bus ring, a second bus ring and a third bus ring, the first bus ring, the second bus ring and the third bus ring are arranged in the axial direction and stacked on the insulating base, and the first bus ring, the second bus ring and the third bus ring are insulated from each other by the insulating base. The bus assembly further includes a star point connector, the star point connector is arranged on the insulating base, and the star point connector is insulated from each other by the insulating base and each bus ring; the star point connector is arranged in the radial direction and spaced apart from at least one bus ring.

[0005] In an embodiment of the present application, the star point connector includes a connection main body and a first star point connection part, a second star point connection part and a third star point connection part connected to the connection main body, the first star point connection part, the second star point connection part and the third star point connection part are spaced apart along the circumferential direction of the bus ring, and the first star point connection part, the second star point connection part and the third star point connection part are respectively used to connect the star points of different phase coils; wherein the connection main body is arranged in the radial direction and spaced apart from at least one bus ring.

[0006] In an embodiment of the present application, the insulating base includes: a first injection insulator having a first insulating cavity inside, the first bus ring and the second bus ring are accommodated in the first insulating cavity, and the third bus ring is stacked on a side of the first injection insulator away from the first bus ring and the second bus ring in the axial direction; and a second injection insulator having a second insulating cavity inside, the first injection insulator and the third bus ring are accommodated in the second insulating cavity, wherein the first injection insulator and the second injection insulator are in a split structure.

[0007] In an embodiment of the present application, the first injection molded insulator comprises: a first insulating body portion; second insulating body portions, the first insulating body portion is provided with the second insulating body portions on both sides in the axial direction, each of the second insulating body portions and the first insulating body portion forms a first insulating cavity, the first bus ring and the second bus ring are arranged in different first insulating cavities respectively; and an insulating connecting portion, each of the second insulating body portions and the first insulating body portion is connected through the insulating connecting portion, wherein the first insulating body portion, the second insulating body portion and the insulating connecting portion are an integral structure.

[0008] In an embodiment of the present application, the insulating base body further comprises: a fixed protrusion, the fixed protrusion is protruded on a side surface of the first injection molded insulator away from the first bus ring and the second bus ring in the axial direction; wherein the second injection molded insulator is provided with a relief through hole extending in the axial direction, and the fixed protrusion is embedded in the relief through hole.

[0009] In an embodiment of the present application, the first bus ring comprises a first body ring and a first protruding portion, the inner edge and / or the outer edge of the first body ring is provided with the first protruding portion; the second bus ring comprises a second body ring and a second protruding portion, the inner edge and / or the outer edge of the second body ring is provided with the second protruding portion.

[0010] In an embodiment of the present application, at least part of the first protruding portion and the second protruding portion are spaced apart in the circumferential direction of the bus ring.

[0011] In an embodiment of the present application, the first protruding portion and the second protruding portion are arranged spaced apart in the circumferential direction of the bus assembly, so that a gap is formed between the first protruding portion and the second protruding portion, and at least part of the insulating base body is arranged in the gap.

[0012] In an embodiment of the present application, the bus ring comprises at least two bus ring segments distributed in the circumferential direction thereof, and each of the bus ring segments is a split assembly structure.

[0013] Correspondingly, the present application also provides an electric machine comprising the bus assembly as described in the above embodiments.

[0014] The present application has the following beneficial effects: Different from the prior art, the present application provides an electric machine and a bus assembly thereof. The first bus ring, the second bus ring and the third bus ring of the bus assembly are arranged in the axial direction and stacked on each other in the insulating base body. The star point connecting piece of the bus assembly is arranged spaced apart from at least one bus ring in the radial direction. In other words, by reasonably arranging the star point connecting piece, the star point connecting piece has little influence on the overall size of the bus assembly in the axial direction, so that the axial size of the bus assembly can be reduced, which is beneficial to the miniaturization design of the electric machine. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0016] Figure 1 is a structural schematic diagram of an embodiment of the busbar assembly of the present application;

[0017] Figure 2 is an exploded structural schematic diagram of the busbar assembly shown in Figure 1

[0018] Figure 3 is a partial schematic diagram of the A-A direction cross-sectional structure of the busbar assembly shown in Figure 1

[0019] Figure 4 is a top view structural schematic diagram of an embodiment of the busbar assembly of the present application, in which the insulating base is omitted;

[0020] Figure 5 is a structural schematic diagram of an embodiment of the clip of the present application;

[0021] Figure 6 is a schematic diagram of an embodiment of the cross-sectional structure of the busbar assembly of the present application;

[0022] Figure 7 is a structural schematic diagram of an embodiment of the first busbar ring of the present application;

[0023] Figure 8 is a structural schematic diagram of an embodiment of the second busbar ring of the present application;

[0024] Figure 9 is a structural schematic diagram of an embodiment of the first busbar ring, the second busbar ring and the first injection-molded insulator of the present application;

[0025] Figure 10 is a schematic diagram of an embodiment of the partial structure of the busbar assembly of the present application;

[0026] Figure 11 is a structural schematic diagram of an embodiment of the busbar ring of the present application.

[0027] Explanation of reference signs:

[0028] ​​10 bus assembly; 11 insulating base; 111 first injection-molded insulator; 1111 first insulating cavity; 1112 first insulating main body part; 1113 second insulating main body part; 1114 insulating connecting part; 112 second injection-molded insulator; 1121 second insulating cavity; 1122 avoiding through hole; 113 fixing protrusion; 114 mounting structure; 12 bus ring; 121 first bus ring; 1211 first main body ring; 1212 first protruding part; 1213 first surface; 122 second bus ring; 1221 second main body ring; 1222 second protruding part; 123 third bus ring; 1231 second surface; 124 bus ring segment; 125 first phase connecting piece; 126 second phase connecting piece; 127 third phase connecting piece; 13 star point connecting piece; 131 connecting main body part; 132 first star point connecting part; 133 second star point connecting part; 134 third star point connecting part; 14 clamp; 141 first connecting part; 142 second connecting part; 143 clamping part; 144 clamping opening. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise stated, the orientation words such as "upper", "lower", "left", "right" generally refer to the upper, lower, left and right of the device in the actual use or working state, and specifically refer to the direction of the drawing plane in the drawings.

[0030] In the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected", "stacked" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] The present application provides an electric machine and a bus assembly thereof, which are described in detail below. It should be noted that the description order of the following embodiments is not limited as the preferred order of the embodiments of the present application. In the following embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in a certain embodiment can be referred to the related description of other embodiments.

[0032] To solve the technical problem of excessive overall axial size of the bus rings of the phase coils in the prior art, an embodiment of the present application provides a bus assembly of a motor. The bus assembly has an axial direction and a radial direction perpendicular to each other. The bus assembly comprises an insulating base. The bus assembly further comprises bus rings, which include a first bus ring, a second bus ring, and a third bus ring. The first bus ring, the second bus ring, and the third bus ring are arranged in the axial direction and stacked on each other on the insulating base, and the first bus ring, the second bus ring, and the third bus ring are insulated from each other by the insulating base. The bus assembly further comprises a star point connector arranged on the insulating base. The star point connector is insulated from the bus rings by the insulating base. The star point connector is arranged in the radial direction and spaced apart from at least one of the bus rings. Details are described below.

[0033] Please refer to Figures 1 to 3 , Figure 1 is a structural schematic diagram of an embodiment of the bus assembly of the present application, Figure 2 is Figure 1 is an exploded structural schematic diagram of the bus assembly shown in Figure 3 is Figure 1 is a partial schematic diagram of the A-A direction cross-sectional structure of the bus assembly shown in.

[0034] In an embodiment, the motor comprises a bus assembly 10. The bus assembly 10 electrically connects the same phase coils among a plurality of coils arranged in a circumferential direction on a stator core of the motor. The bus assembly 10 comprises an insulating base 11. The bus assembly 10 has an axial direction Z and a radial direction R perpendicular to each other. The bus assembly 10 further comprises bus rings 12. The bus rings 12 include a first bus ring 121, a second bus ring 122, and a third bus ring 123. The first bus ring 121, the second bus ring 122, and the third bus ring 123 are arranged in the axial direction Z and stacked on each other on the insulating base 11, and the first bus ring 121, the second bus ring 122, and the third bus ring 123 are insulated from each other by the insulating base 11. The first bus ring 121, the second bus ring 122, and the third bus ring 123 are respectively used to connect the coils of different phases of the motor, specifically, the first bus ring 121, the second bus ring 122, and the third bus ring 123 are respectively used to connect the U-phase coil, the V-phase coil, and the W-phase coil of the motor, for example, the first bus ring 121 can be used to connect the W-phase coil of the motor, the second bus ring 122 can be used to connect the V-phase coil of the motor, and the third bus ring 123 can be used to connect the U-phase coil of the motor, which is not limited herein. In the axial direction Z, the second bus ring 122 is located between the first bus ring 121 and the third bus ring 123.

[0035] The bus assembly 10 further comprises a star point connector 13. The star point connector 13 is arranged on the insulating base 11, and the star point connector 13 is insulated from the first bus ring 121, the second bus ring 122 and the third bus ring 123 by the insulating base 11. The star point connector 13 is used to connect the star points of the coils of different phases of the motor. The star point connector 13 is arranged radially R apart from at least one of the bus rings 12. In this embodiment, the star point connector 13 is arranged reasonably so that the star point connector 13 is not stacked with the first bus ring 121, the second bus ring 122 and the third bus ring 123, and the star point connector 13 has little effect on the overall axial Z dimension of the bus assembly 10, thus the axial Z dimension of the bus assembly 10 can be reduced, which is beneficial to the miniaturization design of the motor.

[0036] Specifically, the first bus ring 121 has a first surface 1213 facing away from the third bus ring 123, and the third bus ring 123 has a second surface 1231 facing away from the first bus ring 121. The bus assembly 10 further has a reference plane a perpendicular to the axial Z. The star point connector 13 is arranged radially R apart from at least one of the first bus ring 121, the second bus ring 122 and the third bus ring 123 in the reference plane a, and at least part of the star point connector 13 is located between the first surface 1213 and the second surface 1231 in the axial Z. In other words, the star point connector 13 is arranged reasonably in this embodiment, so that the star point connector 13 has little effect on the overall axial Z dimension of the bus assembly 10, thus the axial Z dimension of the bus assembly 10 can be reduced, which is beneficial to the miniaturization design of the motor.

[0037] Further, please refer to Figure 4 The star point connector 13 comprises a connection main body 131, and a first star point connecting portion 132, a second star point connecting portion 133 and a third star point connecting portion 134 connected to the connection main body 131. The first star point connecting portion 132, the second star point connecting portion 133 and the third star point connecting portion 134 are arranged circumferentially apart from each other along the bus ring 12. The first star point connecting portion 132, the second star point connecting portion 133 and the third star point connecting portion 134 are respectively used to connect the star points of coils of different phases, i.e. the star points of U-phase coils, the star points of V-phase coils and the star points of W-phase coils. Specifically, the connection main body 131 is arranged radially R apart from at least one of the bus rings 12, and the connection main body 131 of the star point connector 13 is located between the first surface 1213 and the second surface 1231 in the axial Z.

[0038] Exemplarily, as Figure 3As shown, the connecting body part 131 is arranged opposite to the first bus ring 121, specifically, the surface of the connecting body part 131 in the axial direction Z is flush with the first surface 1213 of the first bus ring 121. Of course, in other embodiments of the present application, the connecting body part 131 can be arranged opposite to the third bus ring 123, i.e., the surface of the connecting body part 131 in the axial direction Z is flush with the second surface 1231 of the third bus ring 123, or part of the connecting body part 131 is located between the first surface 1213 and the second surface 1231 in the axial direction Z, which is not limited herein.

[0039] In an embodiment, the bus assembly 10 further comprises a first phase connector 125, a second phase connector 126 and a third phase connector 127. The first phase connector 125 is connected to the first bus ring 121, and the first bus ring 121 is connected to the coils of the motor through the first phase connector 125; the second phase connector 126 is connected to the second bus ring 122, and the second bus ring 122 is connected to the coils of the motor through the second phase connector 126; the third phase connector 127 is connected to the third bus ring 123, and the third bus ring 123 is connected to the coils of the motor through the third phase connector 127.

[0040] The motor of the present embodiment adopts a concentrated winding design, and has high power density, high efficiency and small axial dimension Z. In order to improve the efficiency of the motor, the coils of the concentrated winding generally adopt a parallel connection scheme. Therefore, the number of the first phase connectors 125 is multiple, and each first phase connector 125 is arranged at intervals along the circumferential direction of the first bus ring 121, and each first phase connector 125 is electrically connected to the coils of the same phase in the motor; similarly, the number of the second phase connectors 126 is multiple, and each second phase connector 126 is arranged at intervals along the circumferential direction of the second bus ring 122, and each second phase connector 126 is electrically connected to the coils of the same phase in the motor; similarly, the number of the third phase connectors 127 is multiple, and each third phase connector 127 is arranged at intervals along the circumferential direction of the third bus ring 123, and each third phase connector 127 is electrically connected to the coils of the same phase in the motor.

[0041] For example, the first phase connector 125 is connected to the outer periphery of the first bus ring 121, the second phase connector 126 is connected to the outer periphery of the second bus ring 122, and the third phase connector 127 is connected to the outer periphery of the third bus ring 123. There are multiple star-point connectors 13, each distributed at intervals on the outer periphery of each bus ring 12 (i.e., the first bus ring 121, the second bus ring 122, and the third bus ring 123, hereinafter the same), and the first star-point connecting portion 132, the second star-point connecting portion 133, and the third star-point connecting portion 134 of the star-point connector 13 are located on the side of the connecting body portion 131 away from the bus ring 12. Through the aforementioned method, the bus assembly 10 of this embodiment has a smaller size in the radial direction R, further facilitating the miniaturization design of the motor.

[0042] The first phase connector 125, the first star point connector 132, the second phase connector 126, the second star point connector 133, the third phase connector 127, and the third star point connector 134 are sequentially and alternately distributed. In this way, the first phase connector 125, the second phase connector 126, the third phase connector 127, the first star point connector 132, the second star point connector 133, and the third star point connector 134 are respectively positioned opposite to the lead wires of their respective coils and are easy to connect. The lead wires only need to be led out along the Z-axis, avoiding the need for complex bending processes for the coil lead wires to connect with the bus ring 12. This reduces the difficulty of handling and welding the motor coil lead wires, allowing the wiring operation of the lead wires to be completed by automated equipment such as winding machines.

[0043] Of course, in other embodiments of this application, the first phase connector 125 may be connected to the inner side of the first bus ring 121, the second phase connector 126 may be connected to the inner side of the second bus ring 122, the third phase connector 127 may be connected to the inner side of the third bus ring 123, and the star connectors 13 may be distributed on the inner side of each bus ring 12. This is not limited here.

[0044] Furthermore, such as Figure 4 As shown, the distances D1 between the first phase connector 125 and the first star point connector 132 in the circumferential direction of the busbar assembly 10, D2 between the second phase connector 126 and the second star point connector 133 in the circumferential direction of the busbar assembly 10, and D3 between the third phase connector 127 and the third star point connector 134 in the circumferential direction of the busbar assembly 10 are equal. The distances between each phase connector and each star point connector and the central axis of the motor are equal. The first phase connector 125, the second phase connector 126, the third phase connector 127, the first star point connector 132, the second star point connector 133, and the third star point connector 134 are coplanar on the same side in the axial Z direction, which further facilitates reducing the axial Z dimension of the busbar assembly 10, thereby contributing to the miniaturization design of the motor.

[0045] Please refer to Figure 5 The phase connectors and the star point connectors each include a clip 14. The clip 14 includes a clamping portion 143 having a clamping opening 144 in which the lead wire of the coil is disposed and clamped by the clamping portion 143, and the lead wire is electrically connected to the clamping portion 143 by welding or the like. At least part of the clip 14 further includes a first connecting portion 141 and a second connecting portion 142. One end of the first connecting portion 141 is connected to the bus ring 12 or the connecting body portion 131, and the first connecting portion 141 extends in the radial direction R. One end of the second connecting portion 142 is connected to the other end of the first connecting portion 141, and the second connecting portion 142 extends in the axial direction Z. The clamping portion 143 is connected to the other end of the second connecting portion 142. The first connecting portion 141 and the second connecting portion 142 are in an integral structure, and the clip 14 is formed by bending the first connecting portion 141 and the second connecting portion 142 integrally, so that the second connecting portion 142 has sufficient size in the axial direction Z, and the risk of breakage of the clamping portion 143 when the clip 14 is bent can be reduced. Figure 3 Exemplarily, the clamping portion 143 of the phase connector and the star point connector is disposed close to the third bus ring 123, and the upper end surfaces of the clamping portions 143 of the phase connector and the star point connector are coplanar.

[0046] Please refer to Figure 6 , Figure 6 is a schematic view of a cross-sectional structure of an embodiment of the bus assembly.

[0047] In an embodiment, the insulating base body 11 is formed by two injection molding processes, which has lower manufacturing cost compared to the potting process. Specifically, the insulating base body 11 includes a first injection insulator 111 and a second injection insulator 112. The first injection insulator 111 has a first insulating cavity 1111 inside, and the first bus ring 121 and the second bus ring 122 are accommodated in the first insulating cavity 1111, and the third bus ring 123 is laminated on the side of the first injection insulator 111 in the axial direction Z away from the first bus ring 121 and the second bus ring 122. The second injection insulator 112 has a second insulating cavity 1121 inside, and the first injection insulator 111 and the third bus ring 123 are accommodated in the second insulating cavity 1121, wherein the first injection insulator 111 and the second injection insulator 112 are in a split structure.

[0048] The injection molding process of the insulating base 11 can be specifically as follows: first, the first bus ring 121 and the second bus ring 122 are stacked in the axial direction Z, and a first injection molding process is performed to form a first injection insulator 111; then, the third bus ring 123 is stacked on the side of the first injection insulator 111 away from the first bus ring 121 and the second bus ring 122 in the axial direction Z, and is placed into the star point connector 13, and a second injection molding process is performed to form a second injection insulator 112, thereby obtaining the final bus assembly 10. The first injection insulator 111 and the second injection insulator 112 are formed by two injection molding processes, so that the first injection insulator 111 and the second injection insulator 112 are in a split structure. By the foregoing manner, the insulating base 11 has low manufacturing cost and good sealing and insulating performance, and the insulating treatment process after the coil lead of the motor is welded to the bus assembly 10 is omitted.

[0049] Further, the first injection insulator 111 includes a first insulating main body part 1112, a second insulating main body part 1113, and an insulating connecting part 1114. The first insulating main body part 1112 is provided with the second insulating main body part 1113 on both sides in the axial direction Z, and each second insulating main body part 1113 is spaced apart from the first insulating main body part 1112, so that each first insulating cavity 1111 is formed between the first insulating main body part 1112 and the second insulating main body part 1113, and the first bus ring 121 and the second bus ring 122 are arranged in different first insulating cavities 1111. Each second insulating main body part 1113 and the first insulating main body part 1112 are connected by the insulating connecting part 1114. Since the first insulating main body part 1112, the second insulating main body part 1113, and the insulating connecting part 1114 are formed by the same injection molding process, the first insulating main body part 1112, the second insulating main body part 1113, and the insulating connecting part 1114 are in an integral structure.

[0050] Please refer to Figure 7 The first bus ring 121 includes a first main ring 1211 and a first protruding part 1212. The inner edge and / or the outer edge of the first main ring 1211 is provided with the first protruding part 1212, that is, the first protruding part 1212 protrudes in the radial direction R and away from the first main ring 1211. In the first injection molding process, the mold clamps the first protruding part 1212 to fix the first bus ring 121, which facilitates the injection of the first injection insulator 111 and avoids the influence of the mold clamping the first main ring 1211 on the sealing and insulating performance of the first main ring 1211. Figure 7 Exemplarily, the inner edge and the outer edge of the first main ring 1211 are both provided with the first protruding part 1212.

[0051] Similarly, please refer toFigure 8 The second bus ring 122 comprises a second main ring 1221 and a second protrusion 1222, the inner edge and / or the outer edge of the second main ring 1221 is provided with the second protrusion 1222, that is, the second protrusion 1222 protrudes in the radial direction R and away from the second main ring 1221. In the first injection molding process, the mold clamps the second protrusion 1222 to fix the second bus ring 122, which facilitates the injection of the first injection insulation body 111, and avoids the mold clamping the second main ring 1221 affecting the sealing insulation performance of the second main ring 1221. Figure 8 Exemplarily, the inner edge and the outer edge of the second main ring 1221 are provided with the second protrusion 1222.

[0052] Further, please refer to Figure 9 At least part of the first protrusion 1212 and the second protrusion 1222 are spaced apart in the circumferential direction of the bus ring 12, and at least part of the orthographic projection of the first protrusion 1212 on the reference plane α and the orthographic projection of the second protrusion 1222 on the reference plane α are spaced apart. In other words, the first protrusion 1212 and the second protrusion 1222 are arranged in a staggered manner, which facilitates the mold clamping the first protrusion 1212 and the second protrusion 1222 at the same time in the first injection molding process, thereby fixing the first bus ring 121 and the second bus ring 122.

[0053] The first protrusion 1212 and the second protrusion 1222 are arranged in a spaced apart manner in the circumferential direction of the bus assembly 10, so that a gap is formed between the first protrusion 1212 and the second protrusion 1222, and at least part of the insulation base body 11 is arranged in the gap. Specifically, the above-mentioned insulation connecting portion 1114 is arranged in the gap, so that the first protrusion 1212 and the second protrusion 1222 are insulated from each other.

[0054] Please continue to refer to Figure 6 In an embodiment, the insulation base body 11 further comprises a fixing protrusion 113, the fixing protrusion 113 is provided on the side surface of the first injection insulation body 111 away from the first bus ring 121 and the second bus ring 122 in the axial direction Z. The second injection insulation body 112 is provided with a avoiding through hole 1122 extending in the axial direction Z, and the fixing protrusion 113 is embedded in the avoiding through hole 1122. In the above-mentioned second injection molding process, the mold fixes the first bus ring 121, the second bus ring 122 and the first injection insulation body 111 through the fixing protrusion 113, so as to facilitate the injection of the second injection insulation body 112. In the second injection molding process, the fixing protrusion 113 occupies a certain space, so that the surrounding of the fixing protrusion 113 is surrounded by the second injection insulation body 112, that is, the second injection insulation body 112 forms the avoiding through hole 1122 and the fixing protrusion 113 is embedded in the avoiding through hole 1122.

[0055] Please refer to Figure 10 , Figure 10 is a schematic view of a partial structure of an embodiment of the busbar assembly of the present application.

[0056] In an embodiment, the insulating base 11 further comprises a mounting structure 114, and the busbar assembly 10 is mounted to the housing of the motor through the mounting structure 114.

[0057] Please refer to Figure 11 , Figure 11 is a schematic view of a structure of an embodiment of the busbar ring of the present application.

[0058] In an embodiment, the busbar ring 12 comprises at least two busbar ring segments 124 distributed along the circumference of the busbar ring 12, and each busbar ring segment 124 is a split assembly structure. In other words, each busbar ring segment 124 is an independent element, and each busbar ring segment 124 is assembled together to form the complete busbar ring 12. Compared with directly manufacturing the complete busbar ring 12 on a blank, the split design of the busbar ring 12 of the present embodiment can improve the material utilization. It can be understood that any of the first busbar ring 121, the second busbar ring 122, and the third busbar ring 123 can adopt the split design described above.

[0059] In summary, the present application provides a motor and a busbar assembly thereof. The first busbar ring, the second busbar ring, and the third busbar ring of the busbar assembly are arranged in the axial direction and stacked on each other on the insulating base. The star point connecting piece of the busbar assembly is arranged in the radial direction and spaced apart from each busbar ring. In other words, the present application reasonably arranges the star point connecting piece, so that the star point connecting piece has less influence on the overall axial dimension of the busbar assembly, thereby reducing the axial dimension of the busbar assembly and facilitating the miniaturization design of the motor.

[0060] The motor and the busbar assembly thereof provided by the present application are described in detail above, and the principles and implementation manners of the present application are described by applying specific examples. The above description of the embodiments is only used to help understand the method of the present application and its core idea; meanwhile, for those skilled in the art, the specific implementation manner and application range of the present application can be changed according to the idea of the present application, and the above description of the present application should not be understood as a limitation.

Claims

1. A busbar assembly for an electric machine, characterized in that The current collection assembly has mutually perpendicular axial and radial directions, and comprises: an insulating base body; a current collection ring, including a first current collection ring, a second current collection ring, and a third current collection ring, which are arranged in a stacked manner along the axial direction on the insulating base body, and are insulated from each other by the insulating base body; and a star point connector arranged on the insulating base body, which is insulated from each other by the insulating base body and each current collection ring; and the star point connector is arranged in a spaced manner along the radial direction with at least one current collection ring.

2. The current collection assembly according to claim 1, wherein the star point connector includes a connection main body and a first star point connection part, a second star point connection part, and a third star point connection part connected to the connection main body, which are distributed in a spaced manner along the circumferential direction of the current collection ring, and are respectively used for connecting star points of different phase coils; wherein the connection main body is arranged in a spaced manner along the radial direction with at least one current collection ring.

3. The current collection assembly according to claim 1, wherein the insulating base body includes: a first injection molded insulator having a first insulating cavity inside, in which the first current collection ring and the second current collection ring are accommodated, and the third current collection ring is stacked on a side of the first injection molded insulator away from the first current collection ring and the second current collection ring along the axial direction; and a second injection molded insulator having a second insulating cavity inside, in which the first injection molded insulator and the third current collection ring are accommodated, wherein the first injection molded insulator and the second injection molded insulator are in a split structure.

4. The current collection assembly according to claim 3, wherein the first injection molded insulator includes: a first insulating main body; a second insulating main body, which is arranged on both sides of the first insulating main body along the axial direction, respectively, and each of the second insulating main bodies and the first insulating main body forms the first insulating cavity, and the first current collection ring and the second current collection ring are arranged in different first insulating cavities, respectively; and an insulating connection part, which is connected between each of the second insulating main bodies and the first insulating main body, wherein the first insulating main body, the second insulating main body, and the insulating connection part are in an integrated structure.

5. The current collection assembly according to claim 3, wherein the insulating base body further includes: a fixing protrusion protruding from a side surface of the first injection molded insulator away from the first current collection ring and the second current collection ring along the axial direction; wherein the second injection molded insulator is provided with an avoiding through hole extending along the axial direction, and the fixing protrusion is embedded in the avoiding through hole.

6. The current collection assembly according to any one of claims 1 to 5, wherein The first bus ring comprises a first body ring and a first protrusion, and the inner edge and / or the outer edge of the first body ring is / are provided with the first protrusion; the second bus ring comprises a second body ring and a second protrusion, and the inner edge and / or the outer edge of the second body ring is / are provided with the second protrusion.

7. The bus assembly according to claim 6, wherein, At least part of the first protrusion and the second protrusion are spaced apart from each other in the circumferential direction of the bus ring.

8. The bus assembly according to claim 6, wherein, The first protrusion and the second protrusion are spaced apart from each other in the circumferential direction of the bus assembly, so that a gap is formed between the first protrusion and the second protrusion, and at least part of the insulating base is arranged in the gap.

9. The bus assembly according to any one of claims 1 to 5, wherein, The bus ring comprises at least two bus ring segments distributed along the circumferential direction thereof, and each bus ring segment is a split assembly structure.

10. An electric machine characterized by A bus assembly as claimed in any one of claims 1 to 9.

Images