CN115347706A

CN115347706A - Converge subassembly, motor, electric power steering system and vehicle

Info

Publication number: CN115347706A
Application number: CN202110528214.6A
Authority: CN
Inventors: 施涛; 葛笑
Original assignee: Guangdong Welling Auto Parts Co Ltd; Anhui Welling Auto Parts Co Ltd
Current assignee: Guangdong Welling Auto Parts Co Ltd; Anhui Welling Auto Parts Co Ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2022-11-15

Abstract

The invention provides a bus bar assembly, a motor, an electric power steering system and a vehicle. Wherein, a plurality of welding hooks of a plurality of busbar include first welding hook and second welding hook, and the first at least partly first wall surface setting of welding the hook, and the second welds at least partly second wall surface setting of protruding of hook. According to the invention, the plurality of welding hooks are arranged into the first welding hook and the second welding hook in different directions, so that the plurality of welding hooks are prevented from being concentrated at the same position, the space is reasonably utilized, the distance between two adjacent welding hooks in the plurality of welding hooks is increased, the winding, shearing and welding difficulties are reduced, and the assembly efficiency is improved.

Description

Converge subassembly, motor, electric power steering system and vehicle

Technical Field

The invention relates to the technical field of motors, in particular to a confluence assembly, a motor, an electric power steering system and a vehicle.

Background

At present, a bus bar of a motor is composed of a plurality of bus bars, and the bus bars are connected with a starting end and an end of a winding in a stator of the motor so as to ensure the normal operation of the motor.

In order to realize the effective connection of bus bar and winding, be provided with a plurality of hooks of welding on the bus bar, a plurality of hooks of welding are connected with corresponding winding, however, owing to weld the quantity of hook more, when a plurality of arrangement of welding the hook is unreasonable, then can lead to adjacent interval of welding between the hook less to direct influence winding and welding the welding efficiency between the hook, increase the welding degree of difficulty.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art or the related art.

To this end, a first aspect of the invention provides a busbar assembly.

A second aspect of the invention provides an electric machine.

A third aspect of the present invention is to provide an electric power steering system.

A fourth aspect of the present invention is a vehicle.

In view of the above, according to a first aspect of the present invention, there is provided a bus bar assembly for an electric machine, the bus bar assembly including a plurality of bus bars arranged at intervals, each bus bar including a body section and a welding hook provided on the body section, the plurality of body sections of the plurality of bus bars constituting a body section, the body section including first and second wall surfaces that are opposite to each other, the first wall surface being closer to a central axis of the electric machine than the second wall surface. The plurality of welding hooks of the plurality of bus bars comprise a first welding hook and a second welding hook, at least one part of the first welding hook protrudes out of the first wall surface, and at least one part of the second welding hook protrudes out of the second wall surface.

The bus bar assembly provided by the invention comprises a plurality of bus bars which are arranged at intervals, and the bus bars are mutually insulated. The bus bar is a conductor, and the bus bar is used for connecting winding ends which need to be connected together in a plurality of windings of the motor stator, so that the electric connection of the winding ends is realized, and the bus function is realized. Each bus bar includes a main body section and a welding hook provided on the main body section, the number of the welding hooks being at least one for one bus bar. The main body sections of the plurality of bus bars are used for forming a support framework of the bus bars, and the welding hooks are used for being connected with the windings. The main body segments of the plurality of bus bars are bent and/or curved about a central axis of the electric machine to form the main body portion. The main body includes a first wall surface facing the central axis, and a second wall surface facing away from the first wall surface. Specifically, when the main body section is an arc section, and the main body section is annular, the first wall surface is an inner contour surface, and the second wall surface is an outer contour surface. The plurality of busbars include a plurality of welding hooks, and a plurality of welding hooks include that the orientation is different two types of welding hooks, and first welding hook and second weld the hook, and the first at least partly first wall setting of welding hook is protruding, and at least a part of first welding hook appears beyond first wall promptly, that is to say first welding hook is interior welding hook. At least one part of the second welding hook protrudes out of the second wall surface, namely at least one part of the second welding hook is exposed out of the second wall surface, and the second welding hook is an outer welding hook. According to the invention, the plurality of welding hooks are arranged into the first welding hook and the second welding hook in different directions, so that the plurality of welding hooks are prevented from being concentrated at the same position, the space is reasonably utilized, the distance between two adjacent welding hooks in the plurality of welding hooks is increased, the winding, shearing and welding difficulties are reduced, and the assembly efficiency is improved.

In a possible design, further, the plurality of bus bars includes at least three phase bus bars and a neutral bus bar, wherein the at least three phase bus bars are distributed at intervals, the welding hook of each phase bus bar is a second welding hook, the neutral bus bar is disposed on one side of the at least three phase bus bars, and the welding hook of the neutral bus bar is a first welding hook.

In this design, the plurality of bus bars includes at least three phase bus bars including a U-phase bus bar, a V-phase bus bar, and a W-phase bus bar, and a neutral bus bar. The welding hook of each phase busbar is a second welding hook, namely the welding hook of the phase busbar is an outer welding hook. The neutral bus bar is arranged on one side of the at least three phase bus bars, and the welding hook of the neutral bus bar is a first welding hook, namely the welding hook of the neutral bus bar is an inner welding hook. Through with first welding hook concentrated establish on neutral bus bar, with the second welding hook concentrated establish on at least three looks bus bar, simplify the preparation of the bus bar of different grade type and the connection of winding, shorten the winding and weld the distance between the hook to shorten the length of winding, reduce the welding degree of difficulty of winding.

In one possible embodiment, at least three phase bars are spaced apart in the radial direction.

In this design, the at least three phase bus bars are radially spaced apart, and the neutral bus bar is disposed inboard of the at least three phase bus bars, reducing the space requirements of the bus assembly in the axial direction. For example, in the radial direction, the neutral bus bar and the at least three phase bus bars are different circular arc segments of concentric circles, i.e. from inside to outside comprising the neutral bus bar, the first bus bar, the second bus bar and the third bus bar. Or each phase bus bar in the at least three phase bus bars comprises at least three arc sections with different radiuses, so that the at least three phase bus bars are arranged in an inserting mode, and in the same radius, one part of each phase bus bar in the at least three phase bus bars is located at the radius.

In one possible design, further, at least three phase busbars are arranged in axially spaced stacks.

In this design, at least three phase bus bars are stacked at intervals in the axial direction, and the neutral bus bar is provided on one axial side of the at least three phase bus bars, reducing the space requirement of the bus assembly in the radial direction.

In a possible design, further, the opening of the first welding hook is directed towards the centre axis of the electrical machine.

In this design, the opening of the first welding hook is disposed toward the central axis of the motor, facilitating the terminal of the stator winding to enter the first welding hook through the opening. Specifically, the number of the first welding hooks is multiple, and the multiple first welding hooks are arranged at intervals.

In a possible design, the number of the second welding hooks is multiple, and the free ends of the second welding hooks are bent towards the same side.

In this design, the number of the second welding hooks is plural, and the plural second welding hooks are provided at intervals on the outer ring of the main body portion. The plurality of second welding hooks comprise first ends connected with the main body part and second ends (free ends) deviated from the first ends, the second ends of the second welding hooks are bent/bent to form a wire accommodating area, and the wiring ends of the stator winding extend into the wire accommodating area to be connected with the second welding hooks. Furthermore, a plurality of second ends of the plurality of second welding hooks are bent towards the same side, namely, only one wire accommodating area of one second welding hook is formed between two adjacent second welding hooks, namely, only one terminal used for accommodating a winding is formed between the two second welding hooks, so that the terminals of the plurality of windings can be uniformly distributed, the welding space of the terminals of the winding is sufficient, and the plurality of terminals cannot be mutually interfered in welding. If the free ends of two adjacent second welding hooks bend towards the direction of approaching to each other, 2 wire accommodating areas are formed by the two second welding hooks, 2 terminals of the winding need to be welded in a concentrated mode between the two second welding hooks, and the welding difficulty is high.

In particular, the free ends of the second plurality of welding hooks may be bent in a counter-clockwise or clockwise direction.

In a possible design, further, the number of the first welding hooks is the same as the number of the second welding hooks, and one first welding hook is arranged on the inner side of two adjacent second welding hooks in the plurality of second welding hooks.

In this design, the number of first welding hooks on the neutral bus bar is the same as the sum of the number of second welding hooks on the plurality of phase bus bars, for example, the ending end of the winding is connected to the second welding hooks of all the phase bus bars and the starting end of the winding is connected to the first welding hook of the neutral bus bar. The inboard that two adjacent second welded the hook in a plurality of second welded the hook is equipped with a first hook that welds, that is to say, to the main part, a plurality of hooks that weld that inside and outside set up are the interval and arrange, and in circumference, arbitrary one first welds the hook and is located between two second welding hooks, and the wiring end when the winding is in the connection process, can select required welding hook to weld nearby, reduces the welding degree of difficulty of winding.

In one possible design, the bus bar assembly further includes an insulating member, and the plurality of bus bars are connected to the insulating member at intervals.

In this design, the busbar assembly further includes an insulator for supporting the plurality of busbars and for isolating adjacent busbars among the plurality of busbars to provide electrical insulation. Further, the insulating member may be an insulating frame, and the plurality of bus bars are mounted on the insulating frame. The insulating part can also be an injection molding part, and the injection molding part can be integrally formed with the plurality of bus bars in an injection molding mode.

In a possible design, further, the bus bar assembly further includes a positioning portion, the positioning portion is disposed on the insulating member, and the positioning portion is configured to be engaged with a stator frame of the motor.

In this design, the busbar also includes location portion, and location portion establishes on the insulating part, and location portion can become integral type structure through injection moulding and insulating part. The positioning part is used for being matched with a stator frame of the motor, so that the reliable connection of the bus assembly and the stator frame is realized. Furthermore, location portion can be the buckle, and the buckle joint is on stator frame. Or the positioning part is a riveting part and is riveted on the stator frame.

In a possible design, further, the current collecting assembly further includes a mounting notch, the mounting notch is disposed on the insulating member, and at least a portion of the first welding hook is located in the mounting notch.

In this design, the subassembly that converges still includes the installation breach, and the installation breach is established on the inside wall of insulating part, and when the wiring end of winding stretched into first welding in the hook, because the inboard space of insulating part is comparatively compact, and the installation breach can play effectively dodges the effect, provides the space for the welding of winding, promotes welding efficiency.

Further, the quantity of installation breach is a plurality of, and the quantity of first welding hook is a plurality of, and a plurality of installation breachs and a plurality of first welding hook one-to-one set up.

In one possible design, further, the structure of at least three phase bus bars is the same, the main body segment of each phase bus bar comprising a first main body segment, a second main body segment and a third main body segment connected. At least three looks busbar includes three looks copper bars, and the first main part section of any looks copper bar in the three looks copper bar is located the outside of two other looks copper bars in the three looks copper bar, and the second main part section of any looks copper bar is located between two other looks copper bars, and a part of the third main part section of any looks copper bar is located the inboard of two other looks copper bars.

In this design, the structure of at least three looks busbar is the same, and looks busbar sharing a mould promptly to the subassembly that converges, only needs two kinds of moulds to one kind, and one is used for preparing looks busbar, and another is used for preparing neutral busbar, and then can reduce the mould quantity of preparation busbar, reduces the processing degree of difficulty of busbar, improves production efficiency, reduces the manufacturing cost of busbar, effectively promotes the competitiveness of product. Furthermore, the bus bar is made of copper, the conductivity of the copper is good, the price is relatively low, and in addition, the copper has the advantages of easiness in punch forming and enough hardness.

Further, the body segment of each phase bus bar includes a first body segment, a second body segment, and a third body segment that are connected. At least three looks busbar includes three looks copper bars, and three looks copper bar circumference array 120 forms, and the concrete arrangement of three looks copper bar satisfies, and a part of the first main part section of arbitrary looks copper bar is located the outside of two other looks copper bars, and a part of the second main part section of arbitrary looks copper bar is located between two other looks copper bars, and a part of the third main part section of arbitrary looks copper bar is located the inboard of two other looks copper bars. Note that "inner" means a direction toward the center axis. "outer" is the direction away from the central axis. For one copper bar, the distance between the first main body section and the central axis may be equal distance or not. Likewise, the distance between the second body segment and the third body segment and the central axis is not limited. However, the minimum distance between the first body segment and the central axis is greater than the maximum distance between the second body segment and the central axis, and the minimum distance between the second body segment and the central axis is greater than the maximum distance between the third body segment and the central axis, so that the three phase copper bars can be prevented from interfering with each other during the assembly process.

In a possible design, further, the first main body segment is a first arc segment, the second main body segment is a second arc segment, and the third main body segment is a third arc segment, and a radius R1 of a circle where the first arc segment is located, a radius R2 of a circle where the second arc segment is located, and a radius R3 of a circle where the third arc segment is located satisfy, R1 > R2 > R3.

In this design, first main part section, second main part section and third main part section are the circular arc section, can make things convenient for and alternate the setting between a plurality of busbar. The radius of the first main body segment is larger than that of the second circular arc segment, and the radius of the second main body segment is larger than that of the third main body segment. Since the three phase bus bars have the same structure, the first body segments of the three phase bus bars can form an incomplete outer circular ring, the second body segments of the three phase bus bars can form an incomplete middle circular ring, and the third body segments of the three phase bus bars can form an incomplete inner circular ring, and by making each phase bus bar include at least three circular arc segments having different radii, interference problems during the assembly of the plurality of phase bus bars can be effectively prevented.

In one possible embodiment, the first circular arc segment has a central angle of less than 180 °.

In the design, the central angle corresponding to the first arc segment is less than 180 degrees, namely the circumferential angle of the first arc segment is less than 180 degrees, so that the molding of the mold is facilitated.

In one possible design, further, the second arc segment and the third arc segment include a second arc segment and a third arc segment located on the axial end faces of the phase busbars, the second arc segment and the third arc segment include end points that are far away from each other, and the two end points respectively form an included angle of less than 180 ° with the perpendicular to the central axis of the motor.

In this design, second circular arc section and third circular arc section are including second arc segment and the third arc segment that is located looks busbar axial end face, the second arc segment is including keeping away from the extreme point A of third arc segment, the third arc segment is including keeping away from the extreme point B of second arc segment, extreme point A and extreme point B can form contained angle alpha with the line of the perpendicular line of the central axis respectively, contained angle alpha is less than 180, then when second circular arc section and third circular arc section formula structure as an organic whole, in the preparation process, the circumference angle alpha of second circular arc section and third circular arc section is less than 180, can be convenient for the mould shaping.

In one possible embodiment, the first body section is welded to the outer circumferential surface of the second body section.

In this design, the first body segment is welded to the outer peripheral surface of the second body segment, enabling simplified manufacture of the first, second and third body segments. A part of the first main body section is attached to the outer peripheral wall of the second main body section. Alternatively, the third body segment may be welded to the inner circumferential surface of the second body segment, the third body segment, the second body segment and the first body segment being arranged from the inside to the outside.

In one possible design, further, the second body segment and the third body segment are of unitary construction.

In this design, second main part section and third main part section formula structure as an organic whole, in order to realize the connection with the different radius main part sections, be equipped with the section of bending between second main part section and the third main part section, connect through the section of bending between second main part section and the third main part section, when the quantity of busbar in the busbar was a plurality of, the unequal second main part section of size and third main part section can make things convenient for the interlude of a plurality of busbars of same structure to arrange in the footpath.

In one possible design, further, the second welding hook includes a connecting portion extending in the axial direction and located on the axial end face of the main body segment, and an extending portion for mounting a terminal assembly of the motor. One end of the extension part is connected with the connecting part, and the other end of the extension part is bent after extending in the radial direction away from the central axis of the motor.

In this design, the second welding hook includes a link extending in the axial direction and located on the axial end surface of the main body section, the link being used to mount the terminal assembly of the motor, one link being capable of mounting one terminal assembly, and accurate mounting of the terminal assembly can be ensured by providing the terminal assembly with the corresponding link alone. Specifically, one second welding hook includes one connecting portion, and the number of the connecting portions is plural. And the number of the wiring terminals in the terminal assembly of the motor is less than that of the connecting parts, so that the connecting parts at proper positions can be selected for connection according to the interface requirements of the motor. That is to say, not all connecting portion all can correspond installation binding post, and the connecting portion of suitable position department can be used, sets up a plurality of connecting portions and can satisfy the multiple interface demand of motor.

In a possible design, a part of the insulating element further extends away from the first wall surface to form a mounting portion, one mounting portion being located between two second welding hooks. The bus bar assembly further comprises an assembly interface arranged on the assembly portion, and the assembly interface is used for installing a terminal assembly of the motor.

In this design, a portion of the insulating member extends away from the first wall surface, i.e., the portion of the insulating member extends outward to form a mounting portion, one mounting portion is disposed between the two second welding hooks, and the mounting portion has a mounting interface thereon for mounting a terminal assembly of the motor, thereby ensuring reliable connection performance of the terminal assembly.

In one possible design, the phase bus bar further includes a relief groove provided at a connection of the connection portion, the extension portion, and the main body segment.

In this design, looks busbar still includes the relief groove, and the relief groove is located the junction of connecting portion, extension and main part section, and the relief groove can weld the stress of hook forming process and release to the second, and in addition, when the wiring end welding of winding is on the second welds the hook, the second welds the hook and can receive external force, and the relief groove can provide partial deformation allowance, prevents the junction fatigue fracture of connecting portion, extension and main part section.

In a possible design, further, the main body segment of the neutral bus bar includes a plurality of fourth main body segments distributed at intervals, the structure of any two fourth main body segments of the plurality of fourth main body segments is the same, and the plurality of first welding hooks are distributed at intervals on each fourth main body segment.

In the design, the main body section of the neutral bus bar comprises a plurality of fourth main body sections distributed at intervals, any two fourth main body sections in the plurality of fourth main body sections have the same structure, and can be prepared through one mold, so that the forming is convenient, and the preparation cost is low. A plurality of fourth body segments are circumferentially arrayed 180 degrees. A plurality of first welding hooks are spaced apart on each fourth body segment. Specifically, the number of the first welding hooks on each fourth main body segment is 6. The neutral bus bar includes 12 first welding hooks.

In a possible design, further, the fourth main body segment is a fourth circular arc segment, and the central angle of the fourth circular arc segment is smaller than 180 °.

In the design, the fourth main body section is a fourth arc section, and the central angle corresponding to the fourth arc section is less than 180 degrees, so that the fourth arc section is convenient to demould and form. The radius R4 of the circle where the fourth circular arc section is located is smaller than the radius R3 of the circle where the third main body section is located, and assembling interference of the neutral bus bar and the phase bus bar is avoided.

According to a second aspect of the present invention, there is provided an electrical machine comprising a housing and a bus assembly as provided in any of the above designs, the bus assembly being provided within the housing. The motor also comprises a stator frame, the stator frame is arranged on one axial side of the confluence assembly, a winding is arranged on the stator frame, and the winding is connected with a welding hook of the confluence assembly.

The motor provided by the invention comprises the bus bar assembly provided by any design, so that all the beneficial effects of the bus bar assembly are achieved, and the details are not repeated.

Further, the motor further comprises a machine shell, the confluence assembly is arranged in the machine shell, the motor further comprises a stator frame, the stator frame is connected to one side of the confluence assembly in the axial direction, and a winding arranged on the stator frame can be connected with a welding hook of the confluence assembly.

In a possible design, further, the stator frame includes a frame body and a fitting portion, the fitting portion is disposed on a side of the frame body close to the bus bar assembly, and the fitting portion is connected to the positioning portion of the bus bar assembly.

In this design, stator frame includes frame body and cooperation portion, and the one side that the frame body is close to the subassembly that converges is located to the cooperation portion, and the cooperation portion is connected with the location portion of the subassembly that converges to realize frame body and converge the accurate of subassembly and be connected.

In one possible design, further, the motor further includes a control assembly disposed on the other side of the bus bar assembly in the axial direction, the control assembly having a controller. The terminal assembly comprises a terminal framework and a wiring terminal arranged on the terminal framework, the wiring terminal is connected between the connecting portion of the junction assembly and the controller, and the terminal framework is installed at the assembling interface of the junction assembly.

In this design, a part of terminal skeleton stretches into the dress of the subassembly that converges connects in the mouth to realize the connection of insulating part, binding post's one end is connected with the controller, and binding post's the other end links to each other with connecting portion, thereby makes the winding link to each other with the controller through the subassembly that converges, binding post.

It should be noted that the connection terminal and the connection portion are connected by resistance welding, but may be connected by other welding methods such as ultrasonic welding or other fixing methods. Optionally, the number of terminals is three.

According to a third aspect of the present invention, there is provided an electric power steering system comprising an electric motor as provided in any of the above designs.

The electric power steering system provided by the invention comprises the motor provided by any design, so that the electric power steering system has all the beneficial effects of the motor, and the details are not repeated.

According to a fourth aspect of the present invention there is provided a vehicle comprising an electric power assisted steering system according to any of the designs described above.

The vehicle provided by the invention comprises the electric power steering system provided by any design, so that all the beneficial effects of the electric power steering system are achieved, and the details are not repeated. It is worth to say that the vehicle can be a traditional fuel vehicle or a new energy vehicle. The new energy automobile comprises a pure electric automobile, a range-extended electric automobile, a hybrid electric automobile, a fuel cell electric automobile, a hydrogen engine automobile and the like.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 illustrates one of the schematic structural views of a bus assembly in one embodiment according to the present disclosure;

FIG. 2 illustrates a second exemplary embodiment of a bus bar assembly according to the present invention;

FIG. 3 illustrates one of the schematic structural views of one phase bus bar of the bus assembly in accordance with one embodiment of the present invention;

FIG. 4 illustrates a second schematic of a phase bus bar of the bus assembly according to an embodiment of the present invention;

FIG. 5 illustrates a schematic view of a neutral bus bar of the bus assembly in accordance with one embodiment of the present invention;

FIG. 6 illustrates a third exemplary embodiment of a bus bar assembly;

fig. 7 shows a schematic view of a part of the structure of an electric machine according to an embodiment of the invention;

FIG. 8 illustrates a schematic diagram of a portion of a motor in an embodiment in accordance with the invention;

FIG. 9 shows one of the schematic structural diagrams of the motor in an embodiment in accordance with the invention;

fig. 10 shows a second schematic structural view of the motor according to an embodiment of the invention;

fig. 11 shows a schematic circuit diagram of the motor in an embodiment according to the invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 10 is:

100 a flow-converging component is arranged on the base,

110 of the number of the bus bars,

111-phase bus bar, 1111 first main body segment, 1112 second main body segment, 1113 third main body segment, 111a first-phase copper bar, 111b second-phase copper bar, 111c third-phase copper bar,

112 a neutral bus bar of the plurality of bus bars,

120 a body portion, 121 a first wall surface, 122 a second wall surface,

131 of the first welding hook are provided,

132 second solder hook, 1321 attachment portion, 1322 extension, 1323 relief groove,

140 insulating parts, 141 assembling parts, 142 assembling interfaces, 143 installing gaps,

150 a positioning part for positioning the wafer on the wafer,

200 of a motor, and a motor driving device,

210 stator frame, 211 stator core,

220 of the electric wire, and a plurality of terminals,

230 terminal assemblies, 231 terminal blocks and 232 terminal skeletons.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention, taken in conjunction with the accompanying drawings and detailed description, is set forth below. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

A bus bar assembly 100, a motor 200, an electric power steering system, and a vehicle provided according to some embodiments of the present invention are described below with reference to fig. 1 to 11.

According to a first aspect of the present invention, a bus bar assembly 100 is provided for an electric machine 200, as shown in fig. 1, 2 and 6, the bus bar assembly 100 includes a plurality of bus bars 110 arranged at intervals, each bus bar 110 includes a main body section and a welding hook provided on the main body section, the plurality of main body sections of the plurality of bus bars 110 form a main body 120, the main body 120 includes a first wall surface 121 and a second wall surface 122 which are opposite to each other, and the first wall surface 121 is closer to a central axis of the electric machine 200 than the second wall surface 122. The plurality of welding hooks of the plurality of bus bars 110 include a first welding hook 131 and a second welding hook 132, at least a portion of the first welding hook 131 protrudes from the first wall surface 121, and at least a portion of the second welding hook 132 protrudes from the second wall surface 122.

The bus bar assembly 100 provided by the invention comprises a plurality of bus bars 110 which are arranged at intervals, and the bus bars 110 are mutually insulated. The bus bar 110 is a conductor, and the bus bar 110 is used to connect winding ends that need to be connected together in a plurality of windings of the stator of the motor 200, thereby achieving electrical connection of the winding ends and achieving a bus function. Each of the bus bars 110 includes a main body section and welding hooks provided on the main body section, the number of the welding hooks being at least one for one bus bar 110. The main body segments of the plurality of bus bars 110 are used to form a support skeleton for the bus bars, and the welding hooks are used to connect with the windings. The main body segments of the plurality of bus bars 110 are bent and/or curved about the central axis of the motor 200 to form the main body portion 120. The body 120 includes a first wall 121 facing the central axis and a second wall 122 facing away from the first wall 121. Specifically, when the body section is a circular arc section, and the body section 120 is annular, the first wall surface 121 is an inner contour surface, and the second wall surface 122 is an outer contour surface. The plurality of bus bars 110 include a plurality of welding hooks, the plurality of welding hooks include two types of welding hooks having different orientations, that is, a first welding hook 131 and a second welding hook 132, at least a portion of the first welding hook 131 protrudes from the first wall surface 121, that is, at least a portion of the first welding hook 131 is exposed beyond the first wall surface 121, that is, the first welding hook 131 is an inner welding hook. At least a portion of the second welding hook 132 protrudes from the second wall 122, that is, at least a portion of the second welding hook 132 protrudes beyond the second wall 122, and the second welding hook 132 is an outer welding hook. According to the invention, the plurality of welding hooks are arranged into the first welding hook 131 and the second welding hook 132 in different directions, so that the plurality of welding hooks are prevented from being concentrated at the same position, the space is reasonably utilized, the distance between two adjacent welding hooks in the plurality of welding hooks is increased, the winding, shearing and welding difficulties are reduced, and the assembly efficiency is improved.

In one possible design, as shown in fig. 1, 2 and 6, the plurality of bus bars 110 further includes at least three phase bus bars 111 and a neutral bus bar 112, wherein the at least three phase bus bars 111 are distributed at intervals, the welding hook of each phase bus bar 111 is a second welding hook 132, the neutral bus bar 112 is disposed on one side of the at least three phase bus bars 111, and the welding hook of the neutral bus bar 112 is a first welding hook 131.

In this design, the plurality of bus bars 110 includes at least three phase bus bars 111 and a neutral bus bar 112, and the at least three phase bus bars 111 include a U-phase bus bar 111, a V-phase bus bar 111, and a W-phase bus bar 111. The welding hook of each phase bus bar 111 is the second welding hook 132, i.e., the welding hook of the phase bus bar 111 is the outer welding hook. The neutral bus bar 112 is provided at one side of at least three phase bus bars 111, and the welding hook of the neutral bus bar 112 is a first welding hook 131, that is, the welding hook of the neutral bus bar 112 is an inner welding hook. By collectively arranging the first welding hooks 131 on the neutral bus bar 112 and the second welding hooks 132 on the at least three phase bus bars 111, the preparation of the bus bars 110 of different types and the connection of the windings are simplified, the distance between the windings and the welding hooks is shortened, the length of the windings is shortened, and the welding difficulty of the windings is reduced.

It should be noted that a circuit composed of windings (for example, the ending ends of the windings) connected to the second welding hooks 132 of the at least three phase bus bars 111 and a circuit composed of windings (for example, the starting ends of the windings) connected to the first welding hooks 131 of the neutral bus bar 112 can be connected in parallel in multiple ways to form a multi-phase circuit.

Further, for one phase bus bar 111, the number of the second welding hooks 132 is plural, specifically, the number of the second welding hooks 132 on the phase bus bar 111 is 4, when the number of the phase bus bars 111 is three, then three phase bus bars 111 include 12 second welding hooks 132, and 12 second welding hooks 132 are arranged at intervals on the outer ring of the main body portion 120. Correspondingly, the number of the first welding hooks 131 on the neutral bus bar 112 is 12, and a plurality of the first welding hooks 131 are distributed at intervals on the inner ring of the main body part 120.

In another design, the first welding hook 131 and the second welding hook 132 may be arbitrarily disposed on the phase bus bar 111 and the neutral bus bar 112, that is, for one bus bar 110, the first welding hook 131 extending toward the central axis may be included, and the second welding hook 132 extending away from the central axis may be included, so that flexibility is higher.

In one possible design, further, as shown in fig. 1 and 2, at least three phase bus bars 111 are distributed at radial intervals.

In this design, the at least three phase bus bars 111 are radially spaced apart, and the neutral bus bar 112 is disposed inside the at least three phase bus bars 111, reducing the space requirement of the bus assembly 100 in the axial direction. Specifically, when the phase bus bar 111 and the neutral bus bar 112 are radially arranged, then the axial height of the bus bar 110 is greater than the radial thickness of the bus bar 110. For example, in the radial direction, the neutral bus bar 112 and the at least three phase bus bars 111 are different arc segments of concentric circles, i.e., include, from inside to outside, the neutral bus bar 112, the first bus bar 110, the second bus bar 110, and the third bus bar 110. Or, each phase bus bar 111 of the at least three phase bus bars 111 includes at least three arc segments with different radii, so that the at least three phase bus bars 111 are inserted, and in the same radius, a part of each phase bus bar 111 of the at least three phase bus bars 111 is located at the radius.

In one possible design, further, at least three phase bus bars 111 are arranged stacked at intervals in the axial direction.

In this design, at least three phase bus bars 111 are stacked at intervals in the axial direction, and a neutral bus bar 112 is provided on one axial side of the at least three phase bus bars 111, reducing the space requirement of the bus bar assembly 100 in the radial direction. When the phase bus bar 111 and the neutral bus bar 112 are axially arranged, the axial thickness of the bus bar 110 is smaller than the radial width of the bus bar 110, and at this time, the bus bar 110 has a sheet structure. Further, the main body section of each bus bar 110 is a circular arc section with the same radius, and when a plurality of circular arc sections are stacked in the axial direction, a cylinder can be formed, and space utilization is further optimized.

In one possible design, further, as shown in fig. 1, 2, 5 and 6, the opening of the first welding hook 131 is directed towards the central axis of the electric machine 200.

In this design, the opening of the first welding hook 131 is disposed toward the central axis of the motor 200, facilitating the entry of the terminal 220 of the stator winding through the opening into the first welding hook 131. Specifically, the number of the first welding hooks 131 is plural, and the plural first welding hooks 131 are arranged at intervals.

In one possible design, further, as shown in fig. 1, 2, 3 and 4, the number of the second welding hooks 132 is plural, and the free ends of the plural second welding hooks 132 are bent toward the same side.

In this design, the number of the second welding hooks 132 is plural, and the plural second welding hooks 132 are provided at intervals on the outer ring of the main body portion 120. The plurality of second welding hooks 132 include a first end connected to the main body part 120 and a second end (free end) away from the first end, the second end of the second welding hook 132 is bent/curved to form a wire accommodating area, and the terminal 220 of the stator winding extends into the wire accommodating area to be connected to the second welding hook 132. Further, the second ends of the second welding hooks 132 are bent towards the same side, that is, only one wire accommodating area of the second welding hook 132 is formed between two adjacent second welding hooks 132, that is, only one terminal 220 for accommodating the winding is formed between two second welding hooks 132, so that the terminals 220 of the plurality of windings can be uniformly distributed, the welding space of the terminal 220 of the winding is sufficient, and the plurality of terminals 220 are welded without mutual interference. If the free ends of two adjacent second welding hooks 132 are bent towards the direction close to each other, two second welding hooks 132 form 2 wire accommodating areas, 2 terminals 220 of the winding need to be welded together between the two second welding hooks 132, and the welding difficulty is high.

Specifically, the free ends of the plurality of second welding hooks 132 may be bent in a counterclockwise or clockwise direction.

In a possible design, further, as shown in fig. 1, 2 and 6, the number of the first welding hooks 131 is the same as the number of the second welding hooks 132, and one first welding hook 131 is provided on the inner side of two adjacent second welding hooks 132 among the plurality of second welding hooks 132.

In this design, the number of the first welding hooks 131 of the neutral bus bar 112 is the same as the sum of the number of the second welding hooks 132 of the plurality of phase bus bars 111, for example, the ending end of the winding is connected to the second welding hooks 132 of all the phase bus bars 111, and the starting end of the winding is connected to the first welding hooks 131 of the neutral bus bar 112. The inner sides of two adjacent second welding hooks 132 in the second welding hooks 132 are provided with the first welding hook 131, that is, for the main body part 120, the inner and outer welding hooks are arranged at intervals, in the circumferential direction, any one first welding hook 131 is positioned between the two second welding hooks 132, when the terminal 220 of the winding is in the connection process, the required welding hook can be selected nearby for welding, and the welding difficulty of the winding is reduced.

In one possible design, as shown in fig. 6, the bus bar assembly 100 further includes an insulating member 140, and the plurality of bus bars 110 are connected to the insulating member 140 at intervals.

In this design, the bus bar assembly 100 further includes an insulating member 140, and the insulating member 140 is used for supporting the plurality of bus bars 110 and isolating adjacent bus bars 110 among the plurality of bus bars 110 to perform an electrical insulation function. Further, the insulating member 140 may be an insulating frame on which the plurality of bus bars 110 are mounted. The insulating member 140 may also be an injection molded member, which may be integrally injection molded with the plurality of bus bars 110.

In a possible design, as shown in fig. 6 and 9, the bus bar assembly 100 further includes a positioning portion 150, the positioning portion 150 is disposed on the insulating member 140, and the positioning portion 150 is used for being matched with the stator frame 210 of the motor 200.

In this design, the bus bar 110 further includes a positioning portion 150, the positioning portion 150 is disposed on the insulating member 140, and the positioning portion 150 may be integrated with the insulating member 140 by injection molding. The positioning part 150 is used to cooperate with the stator frame 210 of the motor 200, thereby achieving reliable connection of the bus bar assembly 100 with the stator frame 210. Further, the positioning portion 150 may be a snap, and the snap is snapped on the stator frame 210. Alternatively, the positioning portion 150 is a rivet member riveted to the stator frame 210.

In one possible design, as shown in fig. 6, the bus bar assembly 100 further includes a mounting notch 143, the mounting notch 143 is disposed on the insulating member 140, and at least a portion of the first welding hook 131 is located in the mounting notch 143.

In this design, assembly 100 that converges still includes installation breach 143, and installation breach 143 is established on the inside wall of insulating part 140, and when the terminal 220 of winding stretched into first welding hook 131 in, because the inside space of insulating part 140 is comparatively compact, and installation breach 143 can play effective dodge effect, provides the space for the welding of winding, promotes welding efficiency.

Further, the number of the mounting notches 143 is plural, the number of the first welding hooks 131 is plural, and the plurality of mounting notches 143 and the plurality of first welding hooks 131 are provided in one-to-one correspondence.

In one possible design, further, as shown in fig. 1 and 2, the structure of at least three phase bus bars 111 is the same, and the body segment of each phase bus bar 111 includes a first body segment 1111, a second body segment 1112, and a third body segment 1113 connected thereto. The at least three phase bus bars 111 include three phase copper bars, the first main body segment 1111 of any one phase copper bar in the three phase copper bars is located outside of the other two phase copper bars in the three phase copper bars, the second main body segment 1112 of any one phase copper bar is located between the other two phase copper bars, and a part of the third main body segment 1113 of any one phase copper bar is located inside of the other two phase copper bars.

In this design, the structures of at least three phase bus bars 111 are the same, that is, the phase bus bars 111 share one mold, for the bus bar assembly 100 as a whole, only two molds are needed, one mold is used for preparing the phase bus bars 111, and the other mold is used for preparing the neutral bus bars 112, so that the number of molds for preparing the bus bars 110 can be reduced, the processing difficulty of the bus bars 110 is reduced, the production efficiency is improved, the production cost of the bus bars is reduced, and the competitiveness of the product is effectively improved. Further, the bus bar 110 is made of copper, which has a good conductivity and a relatively low price, and the copper is easy to punch and form and has a sufficient hardness.

Specifically, each of the phase bus bars 111 includes four second soldering hooks 132 arranged at regular intervals, and each of the second soldering hooks 132 includes one connecting portion 1321 for providing the connection terminal 231.

Further, the main body segment of each phase bus bar 111 includes a first main body segment 1111, a second main body segment 1112, and a third main body segment 1113 connected thereto. At least three looks busbar 111 includes three looks copper bar, and three looks copper bar circumference array 120 forms, and the specific arrangement of three looks copper bar satisfies, and a part of the first main part section 1111 of arbitrary looks copper bar is located the outside of two other looks copper bars, and a part of the second main part section 1112 of arbitrary looks copper bar is located between two other looks copper bars, and a part of the third main part section 1113 of arbitrary looks copper bar is located the inboard of two other looks copper bars. Note that "inner" means a direction toward the center axis. "outer" is the direction away from the central axis. For one row of adjacent copper, the first body section 1111 may or may not be equidistant from the central axis. Likewise, the distances between the second and

third body segments

1112, 1113 and the central axis are not limited. However, the minimum distance between the first body segment 1111 and the central axis is greater than the maximum distance between the second body segment 1112 and the central axis, and the minimum distance between the second body segment 1112 and the central axis is greater than the maximum distance between the third body segment 1113 and the central axis, so that the three phase copper bars can be prevented from interfering with each other during the assembly process.

For example, the three phase copper bars include a first phase copper bar 111a, a second phase copper bar 111b, and a third phase copper bar 111c, which are alternately arranged. Specifically, a portion of the first main body segment 1111 of the first-phase copper bar 111a is located on the outer side of the second-phase copper bar 111b and the third-phase copper bar 111c, a portion of the second main body segment 1112 of the first-phase copper bar 111a is located between the second-phase copper bar 111b and the third-phase copper bar 111c, and a portion of the third main body segment 1113 of the first-phase copper bar 111a is located on the inner side of the second-phase copper bar 111b and the third-phase copper bar 111 c.

In a possible design, as shown in fig. 3 and 4, the first main body segment 1111 is a first arc segment, the second main body segment 1112 is a second arc segment, and the third main body segment 1113 is a third arc segment, where a radius R1 of a circle where the first arc segment is located, a radius R2 of a circle where the second arc segment is located, and a radius R3 of a circle where the third arc segment is located satisfy, where R1 > R2 > R3.

In this design, the first main body segment 1111, the second main body segment 1112 and the third main body segment 1113 are all arc segments, which facilitates the insertion of the plurality of bus bars 110. First body segment 1111 has a radius greater than the radius of the second circular arc segment and second body segment 1112 has a radius greater than the radius of third body segment 1113. Since the three phase bus bars 111 have the same structure, the first body segments 1111 of the three phase bus bars 111 can form an incomplete outer circular ring, the second body segments 1112 of the three phase bus bars 111 can form an incomplete middle circular ring, and the third body segments 1113 of the three phase bus bars 111 can form an incomplete inner circular ring, thereby effectively preventing the interference problem during the assembly of the plurality of phase bus bars 111 by allowing each phase bus bar 111 to include at least three circular arc segments having different radii.

In one possible design, further, the second arc segment and the third arc segment include a second arc segment and a third arc segment located on the axial end surface of the phase bus bar 111, the second arc segment and the third arc segment include end points far away from each other, and the two end points respectively form an included angle smaller than 180 ° with the perpendicular to the central axis of the motor 200.

In this design, second circular arc section and third circular arc section are including second arc line segment and the third arc line segment that is located on the 111 axial terminal surfaces of looks busbar, the second arc line segment is including keeping away from the extreme point A of third arc line segment, the third arc line segment is including keeping away from the extreme point B of second arc line segment, extreme point A and extreme point B can form contained angle alpha with the line of the perpendicular line of the central axis respectively, contained angle alpha is less than 180, then when second circular arc section and third circular arc section formula structure as an organic whole, in the preparation process, the circumference angle alpha of second circular arc section and third circular arc section is less than 180, can be convenient for the mould shaping.

In one possible design, further, as shown in fig. 3 and 4, first body segment 1111 is welded to the outer peripheral surface of second body segment 1112.

In this design, first body segment 1111 is welded to the outer circumferential surface of second body segment 1112, enabling simplified manufacture of first body segment 1111, second body segment 1112, and third body segment 1113. A portion of the first body segment 1111 is disposed against the outer peripheral wall of the second body segment 1112. Alternatively, third body segment 1113 may be welded to the inner circumferential surface of second body segment 1112, with third body segment 1113, second body segment 1112, and first body segment 1111 arranged from the inside out.

In one possible design, further, the second body segment 1112 and the third body segment 1113 are of unitary construction.

In this design, the second body segment 1112 and the third body segment 1113 are of an integral structure, in order to connect body segments with different radiuses, a bent segment is arranged between the second body segment 1112 and the third body segment 1113, and the second body segment 1112 and the third body segment 1113 are connected through the bent segment, so that when the number of bus bars 110 in a bus bar is multiple, the second body segment 1112 and the third body segment 1113 with different radial sizes can facilitate the penetration arrangement of the bus bars 110 with the same radial sizes.

In one possible design, as shown in fig. 4, further, the second welding hook 132 includes a link 1321 and an extension 1322, the link 1321 extends in the axial direction and is located on the axial end surface of the main body segment, and the link 1321 is used for mounting the terminal assembly 230 of the motor 200. One end of the extension 1322 is connected to the connection portion 1321, and the other end of the extension 1322 extends radially away from the central axis of the motor 200 and is bent.

In this design, the second welding hook 132 includes the links 1321 and the extensions 1322, the links 1321 extend in the axial direction and are located on the axial end surfaces of the main body segments, the links 1321 are used to mount the terminal assemblies 230 of the motor 200, one link 1321 can mount one terminal assembly 230, and accurate mounting of the terminal assemblies 230 can be ensured by individually providing the terminal assemblies 230 with the corresponding links 1321. Specifically, one second welding hook 132 includes one connecting portion 1321, and the number of the connecting portions 1321 is plural. The number of the connection terminals 231 in the terminal assembly 230 of the motor 200 is less than that of the connection portions 1321, and the connection portions 1321 at appropriate positions can be selected for connection according to the interface requirement of the motor 200. That is, not all the connection portions 1321 may correspond to the mounting terminal 231, the connection portions 1321 at appropriate positions may be applied, and the plurality of connection portions 1321 may be provided to satisfy various interface requirements of the motor 200.

In one possible design, as further shown in fig. 6, 9 and 10, a portion of the insulating member 140 extends away from the first wall 121 to form a mounting portion 141, one mounting portion 141 being located between two second welding hooks 132. The bus bar assembly 100 further includes a mounting interface 142, the mounting interface 142 being provided on the mounting portion 141, the mounting interface 142 being used to mount the terminal assembly 230 of the motor 200.

In this design, a portion of the insulating member 140 extends away from the first wall surface 121, i.e., the portion of the insulating member 140 extends outward to form mounting portions 141, one mounting portion 141 is provided between the two second welding hooks 132, the mounting portions 141 have mounting interfaces 142 thereon, and the mounting interfaces 142 are used to mount the terminal assemblies 230 of the motor 200, thereby ensuring reliable connection performance of the terminal assemblies 230.

In one possible design, further, as shown in fig. 4, the phase bus bar 111 further includes a release slot 1323, and the release slot 1323 is provided at the connection of the connection portion 1321, the extension portion 1322, and the main body segment.

In this design, the phase bus bar 111 further includes a relief groove 1323, the relief groove 1323 is provided at a junction of the connection portion 1321, the extension portion 1322, and the main body segment, the relief groove 1323 is capable of relieving stress during molding of the second welding hook 132, and further, when the terminal 220 of the winding is welded to the second welding hook 132, the second welding hook 132 is subjected to an external force, and the relief groove 1323 is capable of providing a partial deformation margin to prevent fatigue fracture at the junction of the connection portion 1321, the extension portion 1322, and the main body segment.

In one possible design, as shown in fig. 5, the main body segment of the neutral bus bar 112 includes a plurality of fourth main body segments spaced apart, any two of the plurality of fourth main body segments have the same structure, and a plurality of first welding hooks 131 are spaced apart on each of the fourth main body segments.

In this design, the main body section of the neutral bus bar 112 includes a plurality of fourth main body sections distributed at intervals, and any two of the plurality of fourth main body sections have the same structure, and can be manufactured by one mold, so that the molding is convenient, and the manufacturing cost is low. A plurality of fourth body segments are circumferentially arrayed 180 degrees. A plurality of first welding hooks 131 are spaced apart on each fourth body segment. Specifically, the number of the first welding hooks 131 on each fourth body segment is 6. The neutral bus bar 112 includes 12 first welding hooks 131.

It should be noted that, for the bus bar assembly 100 as a whole, the three phase bus bars 111 have the same structure, and considering that the die forming requires two hardware dies for each phase bus bar 111, only 3 sets of hardware dies are required for the whole.

In a possible design, the fourth main body segment is a fourth arc segment, and the central angle of the fourth arc segment is smaller than 180 °.

In the design, the fourth main body section is a fourth circular arc section, and the central angle corresponding to the fourth circular arc section is less than 180 degrees, so that the fourth circular arc section is convenient to demould and form. The radius R4 of the circle where the fourth arc segment is located is smaller than the radius R3 of the circle where the third main body segment 1113 is located, so that the neutral bus bar 112 and the phase bus bar 111 are prevented from being assembled and interfered. Specifically, the fourth arc segment corresponds to a central angle of about 150 °.

In a specific embodiment, the bus bar assembly 100 includes a plurality of bus bars 110 arranged at intervals, each bus bar 110 includes a main body section and a welding hook arranged on the main body section, the main body sections of the plurality of bus bars 110 form a main body 120, the main body 120 includes a first wall surface 121 and a second wall surface 122 which are opposite, and the first wall surface 121 is closer to the central axis of the motor 200 than the second wall surface 122. The plurality of welding hooks of the plurality of bus bars 110 include a first welding hook 131 and a second welding hook 132, at least a portion of the first welding hook 131 protrudes from the first wall surface 121, and at least a portion of the second welding hook 132 protrudes from the second wall surface 122. According to the invention, the plurality of welding hooks are arranged into the first welding hook 131 and the second welding hook 132 in different directions, so that the plurality of welding hooks are prevented from being concentrated at the same position, the space is reasonably utilized, the distance between two adjacent welding hooks in the plurality of welding hooks is increased, the winding, shearing and welding difficulties are reduced, and the assembly efficiency is improved.

It should be noted that the plurality of bus bars 110 includes at least three phase bus bars 111 and a neutral bus bar 112, wherein the at least three phase bus bars 111 are distributed at intervals, a welding hook of each phase bus bar 111 is a second welding hook 132, the neutral bus bar 112 is disposed at one side of the at least three phase bus bars 111, a welding hook of the neutral bus bar 112 is a first welding hook 131, and different types of welding hooks are respectively disposed on different types of bus bars 110, so as to simplify the preparation of the different types of bus bars 110 and the connection of the windings, and shorten the distance between the windings and the welding hooks, thereby shortening the length of the windings and reducing the welding difficulty of the windings.

The distribution pattern of the plurality of phase bus bars 111 includes at least: radially spaced, axially spaced stacked arrangements. The radially spaced arrangement can reduce the space requirements of the bus bar assembly 100 in the axial direction. The axially spaced arrangement can reduce the space requirement of the bus bar assembly 100 in the radial direction.

Regarding the different types of welding hooks, the openings of the first welding hooks 131 are oriented differently, for example, towards the central axis of the electric machine 200, facilitating the passage of the terminals 220 of the stator winding through the openings into the first welding hooks 131. The number of the second welding hooks 132 is multiple, the free ends of the second welding hooks 132 are bent towards the same side, and only one terminal 220 for accommodating the winding is arranged between the two second welding hooks 132, so that the terminals 220 of the windings can be uniformly distributed, the welding space of the terminals 220 of the windings is sufficient, and the plurality of terminals 220 cannot be mutually interfered when being welded. The number of the first welding hooks 131 is the same as that of the second welding hooks 132, and one first welding hook 131 is disposed on the inner side of two adjacent second welding hooks 132 in the plurality of second welding hooks 132. When the terminal 220 of the winding is in the connection process, the required welding hook can be selected nearby for welding, and the welding difficulty of the winding is reduced. Specifically, in order to electrically insulate the plurality of bus bars 110, the plurality of bus bars 110 are disposed on the insulating member 140. The bus bar assembly 100 further includes a positioning portion 150, the positioning portion 150 is disposed on the insulating member 140, and the positioning portion 150 is used for being matched with the stator frame 210 of the motor 200, so that the bus bar assembly 100 is reliably connected with the stator frame 210. It is worth to say that, the assembly 100 that converges also includes the installation breach 143, and the installation breach 143 is located on insulating part 140, and at least a part of first welding hook 131 is located in installation breach 143, and when the terminal 220 of winding stretches into first welding hook 131, because the inside space of insulating part 140 is comparatively compact, and installation breach 143 can play effective dodging effect, provides the space for the welding of winding, promotes welding efficiency.

Further, the structures of the at least three phase bus bars 111 are the same, so that the number of dies for preparing the bus bars 110 can be reduced, the processing difficulty of the bus bars 110 is reduced, the production efficiency is improved, the production cost of the bus bars is reduced, and the competitiveness of products is effectively improved. The main body segment of each phase bus bar 111 includes a first main body segment 1111, a second main body segment 1112, and a third main body segment 1113 connected thereto. At least three looks busbar 111 includes three looks copper bars, and the first main part section 1111 of any looks copper bar in three looks copper bars is located the outside of two other looks copper bars in three looks copper bars, and the second main part section 1112 of any looks copper bar is located between two other looks copper bars, and a part of the third main part section 1113 of any looks copper bar is located the inboard of two other looks copper bars, can prevent three looks copper bars mutual interference in the assembly process.

Further, first main body section 1111 is the first circular arc section, second main body section 1112 is the second circular arc section, and third main body section 1113 is the third circular arc section, and radius R1 of the circle of first circular arc section place, radius R2 of the circle of second circular arc section place and radius R3 of the circle of third circular arc section place satisfy, and R1 > R2 > R3 to effectively prevent the interference problem in the assembling process of a plurality of looks busbar 111.

Further, second circular arc section and third circular arc section are including being located second arc section and the third arc section on the 111 axial end faces of looks busbar, and second arc section and third arc section are including the extreme point of keeping away from each other, and the contained angle that two extreme points formed with the central axis perpendicular of motor 200 respectively is less than 180, the mould shaping of being convenient for.

Regarding the connection manner between the plurality of main body segments in the phase bus bar 111, for example, the first main body segment 1111 is welded to the outer circumferential surface of the second main body segment 1112. The second body segment 1112 and the third body segment 1113 are of unitary construction. The preparation of dividing one phase bus bar 111 into a plurality of bus segments can improve the utilization rate of materials. First body segment 1111 and second welding hook 132 located thereon are one bus bar segment, and second body segment 1112 and the third body segment and second welding hook 132 located thereon are one bus bar segment.

Further, the second welding hook 132 includes a link 1321 and an extension 1322, the link 1321 extends in the axial direction and is located on the axial end face of the main body segment, and the link 1321 is used for mounting the terminal assembly 230 of the motor 200. One end of the extension 1322 is connected to the connection portion 1321, and the other end of the extension 1322 extends radially away from the central axis of the motor 200 and is bent.

Further, a portion of the insulating member 140 extends away from the first wall surface 121 to form a fitting portion 141, and one fitting portion 141 is located between the two second welding hooks 132. The bus bar assembly 100 further includes a mounting interface 142, the mounting interface 142 being provided on the mounting portion 141, the mounting interface 142 being used to mount the terminal assembly 230 of the motor 200.

Further, the phase bus bar 111 further includes a release slot 1323, the release slot 1323 is disposed at a connection portion of the connection portion 1321, the extension portion 1322 and the main body segment, the release slot 1323 can release stress during molding of the second welding hook 132, and the release slot 1323 can provide a part of deformation allowance to prevent fatigue fracture at the connection portion of the connection portion 1321, the extension portion 1322 and the main body segment.

Further, the main body section of the neutral bus bar 112 includes a plurality of fourth main body sections distributed at intervals, any two of the plurality of fourth main body sections have the same structure, and the plurality of first welding hooks 131 are distributed at intervals on each of the fourth main body sections.

Further, the fourth main body segment is a fourth circular arc segment, and a central angle corresponding to the fourth circular arc segment is smaller than 180 °.

According to a second aspect of the present invention, there is provided a motor 200, as shown in fig. 7 to 10, comprising a housing and a bus bar assembly 100 provided in any one of the above designs, the bus bar assembly 100 being provided in the housing. The motor 200 further includes a stator frame 210, the stator frame 210 being provided at one axial side of the bus bar assembly 100, the stator frame 210 having windings, the windings being connected to the welding hooks of the bus bar assembly 100.

The motor 200 provided by the present invention includes the bus bar assembly 100 provided by any of the above designs, so that all the advantages of the bus bar assembly 100 are provided, and no further description is provided herein.

The bus bar assembly 100 includes a plurality of bus bars 110 arranged at intervals, each bus bar 110 includes a main body section and a welding hook arranged on the main body section, the main body sections of the plurality of bus bars 110 form a main body 120, the main body 120 includes a first wall surface 121 and a second wall surface 122 which are opposite to each other, and the first wall surface 121 is closer to the central axis of the motor 200 than the second wall surface 122. The plurality of welding hooks of the plurality of bus bars 110 include a first welding hook 131 and a second welding hook 132, at least a portion of the first welding hook 131 protrudes from the first wall surface 121, and at least a portion of the second welding hook 132 protrudes from the second wall surface 122. According to the invention, the plurality of welding hooks are arranged into the first welding hook 131 and the second welding hook 132 in different directions, so that the plurality of welding hooks are prevented from being concentrated at the same position, the space is reasonably utilized, the distance between two adjacent welding hooks in the plurality of welding hooks is increased, the winding, shearing and welding difficulties are reduced, and the assembly efficiency is improved.

It should be noted that the plurality of bus bars 110 includes at least three phase bus bars 111 and a neutral bus bar 112, wherein the at least three phase bus bars 111 are distributed at intervals, a welding hook of each phase bus bar 111 is a second welding hook 132, the neutral bus bar 112 is disposed at one side of the at least three phase bus bars 111, a welding hook of the neutral bus bar 112 is a first welding hook 131, and different types of welding hooks are respectively disposed on different types of bus bars 110, so as to simplify the preparation of the different types of bus bars 110 and the connection of the windings, and shorten the distance between the windings and the welding hooks, thereby shortening the length of the windings and reducing the difficulty in welding the windings.

The distribution pattern of the plurality of phase bus bars 111 includes at least: radially spaced, axially spaced stacked arrangements. The radially spaced arrangement can reduce the space requirements of the bus bar assembly 100 in the axial direction. The axially spaced arrangement can reduce the space requirements of the bus bar assembly 100 in the radial direction.

Further, the structures of the at least three phase bus bars 111 are the same, so that the number of dies for preparing the bus bars 110 can be reduced, the processing difficulty of the bus bars 110 is reduced, the production efficiency is improved, the production cost of the bus bars is reduced, and the competitiveness of products is effectively improved. The body segment of each phase bus bar 111 includes a first body segment 1111, a second body segment 1112, and a third body segment 1113 connected thereto. At least three looks busbar 111 includes three looks copper bar, and the first main part section 1111 of any looks copper bar in three looks copper bar is located the outside of two other looks copper bars in three looks copper bar, and the second main part section 1112 of any looks copper bar is located between two other looks copper bars, and a part of the third main part section 1113 of any looks copper bar is located the inboard of two other looks copper bars, can prevent three looks copper bars mutual interference in the assembling process. For example, the three phase copper bars include a first phase copper bar 111a, a second phase copper bar 111b, and a third phase copper bar 111c, which are arranged alternately. Specifically, a portion of the first main body segment 1111 of the first-phase copper bar 111a is located on the outer side of the second-phase copper bar 111b and the third-phase copper bar 111c, a portion of the second main body segment 1112 of the first-phase copper bar 111a is located between the second-phase copper bar 111b and the third-phase copper bar 111c, and a portion of the third main body segment 1113 of the first-phase copper bar 111a is located on the inner side of the second-phase copper bar 111b and the third-phase copper bar 111 c.

Specifically, as shown in fig. 7, the motor 200 is a 12-slot motor 200, a stator of the motor 200 includes 12 stator teeth, a stator frame 210 is disposed on the stator teeth, each stator tooth is provided with a winding (enameled wire), each winding has 2 terminals 220 (start end and end), and the 12 windings on the 12 stator teeth have 24 terminals 220. The wiring form of the motor 200 is Y-shaped connection, and 4 paths of connection are connected in parallel. When the bus bar assembly 100 is Y-wired, 3 connecting portions 1321 may be provided for welding the terminal 231, and the connecting portions 1321 serve as current interfaces.

Further, as shown in fig. 8, the motor 200 further includes a housing, the bus bar assembly 100 is disposed in the housing, the motor 200 further includes a stator frame 210, the stator frame 210 is connected to one side of the bus bar assembly 100 in the axial direction, and a winding disposed on the stator frame 210 can be connected to a welding hook of the bus bar assembly 100.

In one possible design, further, the stator frame 210 includes a frame body and a fitting portion, the fitting portion is disposed on one side of the frame body close to the bus bar assembly 100, and the fitting portion is connected with the positioning portion 150 of the bus bar assembly 100.

In this design, the stator frame 210 includes a frame body and a fitting portion, the fitting portion is disposed on one side of the frame body close to the bus bar assembly 100, and the fitting portion is connected to the positioning portion 150 of the bus bar assembly 100, so that the frame body and the bus bar assembly 100 are accurately connected. The motor 200 further includes a stator core 211, a stator frame 210 is mounted on the stator core 211, and windings are provided on the stator frame 210.

In one possible design, further, the motor 200 further includes a control assembly disposed on the other side of the bus bar assembly 100 in the axial direction, the control assembly having a controller. The terminal assembly 230, the terminal assembly 230 includes a connection terminal 231, and the connection terminal 231 is connected between the connection portion 1321 of the bus bar assembly 100 and the controller.

In this design, one end of the connection terminal 231 is connected to the controller, and the other end of the connection terminal 231 is connected to the connection portion 1321, so that the winding is connected to the controller through the bus bar assembly 100 and the connection terminal 231. Further, the terminal assembly 230 further includes a terminal frame 232, a portion of the connection terminal 231 is disposed on the terminal frame 232, and a portion of the terminal frame 232 extends into the assembly interface 142 of the bus bar assembly 100, so as to achieve connection of the insulation portions.

Further, as shown in fig. 10, the terminal block 231 and the terminal frame 232 may be integrally molded by injection molding. Or may be assembled from two separate components.

The terminal 231 and the connection portion 1321 are connected by resistance welding, but may be connected by other welding methods such as ultrasonic welding or other fixing methods. Alternatively, the connection terminals 231 are three in number.

According to a third aspect of the present invention, there is provided an electric power steering system comprising an electric motor 200 provided in any of the designs described above.

The electric power steering system provided by the invention comprises the motor 200 provided by any design, so that all beneficial effects of the motor 200 are achieved, and the details are not repeated.

Wherein, motor 200 is 12 slot motor 200, and the stator of motor 200 includes 12 stator teeth, and stator frame 210 sets up on the stator tooth, all is provided with a winding (enameled wire) on every stator tooth, and a winding has 2 terminals 220 (the initiating terminal and the ending terminal), and 12 windings on 12 stator teeth are total 24 terminals 220. As shown in fig. 11, the connection form of the motor 200 is a Y-connection, 4-way parallel connection. When the bus bar assembly 100 is Y-wired, 3 connecting portions 1321 may be provided for welding the terminal 231, and the connecting portions 1321 serve as current interfaces. The bus bar assembly 100 of the motor 200 includes a plurality of bus bars 110 arranged at intervals, and the bus bars 110 are insulated from each other. The bus bar 110 is a conductor, and the bus bar 110 is used to connect winding ends that need to be connected together in a plurality of windings of the stator of the motor 200, thereby realizing electrical connection of the winding ends and realizing a bus function. Each of the bus bars 110 includes a main body section and welding hooks provided on the main body section, the number of the welding hooks being at least one for one bus bar 110. The main body segments of the plurality of bus bars 110 are used to form a support skeleton for the bus bars, and the welding hooks are used to connect with the windings. The main body segments of the plurality of bus bars 110 are bent and/or curved about the central axis of the motor 200 to form the main body portion 120. The body 120 includes a first wall 121 facing the central axis and a second wall 122 facing away from the first wall 121. Specifically, when the main body section is a circular arc section, and the main body 120 is annular, the first wall surface 121 is an inner contour surface, and the second wall surface 122 is an outer contour surface. The plurality of bus bars 110 include a plurality of welding hooks, the plurality of welding hooks include two types of welding hooks having different orientations, that is, a first welding hook 131 and a second welding hook 132, at least a portion of the first welding hook 131 protrudes from the first wall surface 121, that is, at least a portion of the first welding hook 131 is exposed beyond the first wall surface 121, that is, the first welding hook 131 is an inner welding hook. At least a portion of the second welding hook 132 protrudes from the second wall 122, that is, at least a portion of the second welding hook 132 protrudes beyond the second wall 122, and the second welding hook 132 is an outer welding hook. According to the invention, the plurality of welding hooks are arranged into the first welding hook 131 and the second welding hook 132 in different directions, so that the plurality of welding hooks are prevented from being concentrated at the same position, the space is reasonably utilized, the distance between two adjacent welding hooks in the plurality of welding hooks is increased, the winding, shearing and welding difficulties are reduced, and the assembly efficiency is improved.

Specifically, the distribution pattern of the plurality of phase bus bars 111 includes at least: radially spaced, axially spaced stacked arrangements. The radially spaced arrangement can reduce the space requirements of the bus bar assembly 100 in the axial direction. The axially spaced arrangement can reduce the space requirements of the bus bar assembly 100 in the radial direction.

Regarding the different types of welding hooks, the opening of the first welding hook 131 faces the central axis of the motor 200, for example, facilitating the stator winding terminal 220 to enter the first welding hook 131 through the opening. The number of the second welding hooks 132 is multiple, the free ends of the second welding hooks 132 are bent towards the same side, and only one terminal 220 for accommodating the winding is arranged between the two second welding hooks 132, so that the terminals 220 of the windings can be uniformly distributed, the welding space of the terminals 220 of the windings is sufficient, and the plurality of terminals 220 cannot be mutually interfered when being welded. The number of the first welding hooks 131 is the same as that of the second welding hooks 132, and one first welding hook 131 is disposed on the inner side of two adjacent second welding hooks 132 in the plurality of second welding hooks 132. When the terminal 220 of the winding is in the connection process, the required welding hook can be selected nearby for welding, and the welding difficulty of the winding is reduced. Specifically, in order to electrically insulate the plurality of bus bars 110, the plurality of bus bars 110 are disposed on the insulating member 140. The bus bar assembly 100 further includes a positioning portion 150, the positioning portion 150 is disposed on the insulating member 140, and the positioning portion 150 is used for being matched with the stator frame 210 of the motor 200, so that the bus bar assembly 100 is reliably connected with the stator frame 210. It is worth to say that, the assembly 100 that converges also includes the installation breach 143, and the installation breach 143 is located on insulating part 140, and at least a part of first welding hook 131 is located in installation breach 143, and when the terminal 220 of winding stretches into first welding hook 131, because the inside space of insulating part 140 is comparatively compact, and installation breach 143 can play effective dodging effect, provides the space for the welding of winding, promotes welding efficiency.

The vehicle provided by the invention comprises the electric power steering system provided by any design, so that all the beneficial effects of the electric power steering system are achieved, and the details are not repeated. It is worth to say that the vehicle can be a traditional fuel vehicle or a new energy vehicle. The new energy automobile comprises a pure electric automobile, an extended range electric automobile, a hybrid electric automobile, a fuel cell electric automobile, a hydrogen engine automobile and the like.

In the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A bus bar assembly for an electric machine, comprising:

the bus bars are arranged at intervals, each bus bar comprises a main body section and a welding hook arranged on the main body section, the main body sections of the bus bars form a main body part, the main body part comprises a first wall surface and a second wall surface which are opposite, and the first wall surface is close to the central axis of the motor compared with the second wall surface;

the plurality of welding hooks of the plurality of bus bars comprise a first welding hook and a second welding hook, at least one part of the first welding hook protrudes out of the first wall surface, and at least one part of the second welding hook protrudes out of the second wall surface.

2. The bus assembly of claim 1, wherein the plurality of bus bars comprises:

at least three phase bus bars, wherein the at least three phase bus bars are distributed at intervals, and the welding hook of each phase bus bar is the second welding hook;

the neutral bus bar is arranged on one side of the at least three phase bus bars, and the welding hook of the neutral bus bar is the first welding hook.

3. The bus bar assembly of claim 2,

at least three of the phase bus bars are radially spaced apart; or

At least three of the phase bus bars are arranged in axially spaced stacks.

4. The bus bar assembly of claim 2,

the opening of the first welding hook faces to the central axis of the motor; and/or

The number of the second welding hooks is multiple, and the free ends of the second welding hooks are bent towards the same side.

5. The bus bar assembly of claim 4,

the quantity of first welding hook with the quantity of second welding hook is the same, and the inboard of two adjacent second welding hooks in a plurality of second welding hooks is equipped with one first welding hook.

6. The bus bar assembly of any one of claims 2 to 5, further comprising:

and the bus bars are connected to the insulating piece at intervals.

7. The bus bar assembly of claim 6, further comprising:

and the positioning part is arranged on the insulating part and is used for being matched with the stator frame of the motor.

8. The bus assembly of claim 6, further comprising:

and the mounting notch is arranged on the insulating piece, and at least one part of the first welding hook is positioned in the mounting notch.

9. The bus bar assembly according to any of claims 2 to 5,

the at least three phase bus bars are identical in structure, and the main body segment of each phase bus bar includes a first main body segment, a second main body segment and a third main body segment which are connected;

the at least three phase bus bars comprise three phase copper bars, wherein one part of the first main body section of any one of the three phase copper bars is positioned at the outer sides of the other two phase copper bars in the three phase copper bars, one part of the second main body section of any one of the three phase copper bars is positioned between the other two phase copper bars, and one part of the third main body section of any one of the three phase copper bars is positioned at the inner sides of the other two phase copper bars.

10. The bus bar assembly of claim 9,

the first main body segment is a first circular arc segment, the second main body segment is a second circular arc segment, the third main body segment is a third circular arc segment, the radius R1 of the circle where the first circular arc segment is located, the radius R2 of the circle where the second circular arc segment is located and the radius R3 of the circle where the third circular arc segment is located meet, and R1 is greater than R2 and greater than R3.

11. The bus bar assembly of claim 10,

the central angle corresponding to the first circular arc section is less than 180 degrees; and/or

The second arc segment and the third arc segment are located including second arc segment and the third arc segment on the looks busbar axial end face, the second arc segment with the third arc segment is including the extreme point of keeping away from each other, two the extreme point respectively with the contained angle that the central axis perpendicular formed of motor is less than 180.

12. The bus bar assembly of claim 9,

the first main body section is welded on the outer peripheral surface of the second main body section;

the second body segment and the third body segment are of a unitary construction.

13. The buss assembly of claim 6, wherein the second welding hook comprises:

the connecting part extends along the axial direction and is positioned on the axial end face of the main body section, and the connecting part is used for mounting a terminal component of the motor;

one end of the extension part is connected with the connecting part, and the other end of the extension part deviates from the central axis of the motor and bends after extending radially.

14. The bus bar assembly of claim 13,

a part of the insulating piece extends away from the first wall surface to form assembling parts, and one assembling part is positioned between the two second welding hooks;

the bus bar assembly further comprises:

and the assembly interface is arranged on the assembly part and used for installing a terminal component of the motor.

15. The bus assembly of claim 14, wherein the phase bus bar further comprises:

and the release groove is arranged at the joint of the connecting part, the extending part and the main body section.

16. The bus assembly of any one of claims 10 to 15,

the main body segment of the neutral bus bar includes a plurality of fourth main body segments distributed at intervals, any two of the fourth main body segments have the same structure, and a plurality of the first welding hooks are distributed at intervals on each of the fourth main body segments.

17. The bus bar assembly of claim 16,

the fourth main body section is a fourth arc section, and the central angle corresponding to the fourth arc section is less than 180 degrees.

18. An electric machine, comprising:

a housing;

the bus assembly of any one of claims 1 to 17, disposed within the enclosure; and

the stator frame is arranged on one axial side of the confluence assembly, and is provided with a winding, and the winding is connected with the welding hook of the confluence assembly.

19. The electric machine of claim 18, wherein the stator frame comprises:

a frame body;

the matching part is arranged on one side, close to the confluence assembly, of the frame body, and the matching part is connected with the positioning part of the confluence assembly.

20. The electric machine of claim 18, further comprising:

the control assembly is arranged on the other side of the confluence assembly along the axial direction and is provided with a controller;

a terminal assembly including a connection terminal connected between the connection part of the bus bar assembly and the controller.

21. The electric machine of claim 20, wherein said terminal assembly further comprises:

and one part of the terminal framework is arranged on the terminal framework, and one part of the terminal framework is arranged at the assembly interface of the confluence assembly.

22. An electric power steering system characterized by comprising: an electric machine as claimed in any one of claims 18 to 21.

23. A vehicle, characterized by comprising: the electric power steering system of claim 22.