Double-rotor axial magnetic flux motor

Abstract

The utility model discloses a birotor axial magnetic flux motor, comprising a stator assembly comprising a plurality of stator windings, the plurality of stator windings are arranged in a circular ring shape, and winding housings of two adjacent stator windings are connected with each other; the rotor assembly comprises a first rotor assembly, a cross coupling and a second rotor assembly, cross grooves are formed in the first rotor assembly and the second rotor assembly, and the cross coupling is arranged between the first rotor assembly and the second rotor assembly; the cross coupling is arranged in the cross grooves of the first rotor assembly and the second rotor assembly so as to lock the relative rotation relation of the first rotor assembly and the second rotor assembly; wherein the first rotor assembly and the second rotor assembly are arranged on the two sides of the stator assembly respectively, and the first rotor assembly and the second rotor assembly are fixedly connected with each other. The whole motor designed by the utility model is convenient to assemble and operate, good in stability and easy to produce.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially relates to a double rotor axial flux motor. BACKGROUND

[0002] In recent years, with the rapid development of new energy vehicles, the technical indexes such as motor efficiency and power density are also continuously improved;Among them, the rotor axial flux motor is a special type of permanent magnet synchronous motor, this kind of motor has unique structure, its rotor is located in the side of the stator, not inside the stator, which makes the rotor can have larger diameter size, so as to obtain higher torque output under the action of the same force. Compared with the traditional radial flux motor, the axial flux motor generally has higher torque density and power density, its structure is more compact, and the weight is lighter, which has gradually become a new research direction.

[0003] The current existing double rotor axial flux motor structure is generally complex, its two rotors are generally connected and positioned by a key with a motor main shaft, so that the motor main shaft and the round hole of the rotor are over-matched to form a driving component that can rotate integrally. Due to the structural limitation of the motor, the operator often needs to first assemble one side rotor into the motor main shaft, then put it into the stator shell together, and then press the other side rotor assembly into the stator shell; And then press the two side bearings into the main shaft, assemble the two side end covers, so as to complete the installation.

[0004] And, when setting the stator of the above-mentioned double rotor axial flux motor, it is composed of a plurality of same single stator cores wound with copper wire windings arranged and spliced radially uniformly, and the single windings are connected in series or parallel according to the connection order of generating axial rotating magnetic field to become stator windings;The stator windings are bonded as a whole stator assembly by pouring resin and curing, and then the whole stator assembly and the stator shell are bonded by glue.

[0005] Research found that this stator still has the following shortcomings and deficiencies:

[0006] 1. The stator is made of resin curing and bonding, which has insufficient strength;2. The stator is wrapped with resin, and the heat dissipation of the copper wire and the iron core is difficult;3. One main shaft needs to connect two rotors, which needs to be designed with longer size, and the main shaft and the rotor have large over-matching area, which is easy to cause wear between the rotor and the main shaft during assembly and pressing, and the assembly is difficult, the assembly precision is poor;4. The whole machine is difficult to assemble, the assembly precision is not high, and the repeated installation affects the precision of the whole machine;5. The stator is sealed and bonded by resin, once the fault occurs, it cannot be repaired subsequently, and the resource recovery is difficult. UTILITY MODEL CONTENTS

[0007] The utility model wants to solve the technical problem that provides a kind of double rotor axial flux motor, to solve the rotor assembly of existing double rotor axial flux motor When assembling, the problems of high assembly difficulty, poor assembly accuracy, easy to wear, stator assembly is made of resin solidification adhesion, leading to poor strength, insufficient accuracy, subsequent heat dissipation difficulty and resource recovery difficulty.

[0008] In order to solve the above technical problems, the utility model adopts the technical scheme that a kind of double rotor axial flux motor, it includes:

[0009] Stator assembly, it includes multiple stator windings, multiple stator windings are arranged in circular ring, and the winding shell of adjacent two stator windings is connected with each other;

[0010] Rotor assembly, it includes first rotor assembly, cross coupling and second rotor assembly, the first rotor assembly and second rotor assembly are all provided with cross recess, the cross coupling is arranged between the first rotor assembly and second rotor assembly, and the cross coupling is arranged in the cross recess of the first rotor assembly and second rotor assembly, to lock the relative rotation relationship of the first rotor assembly and second rotor assembly;

[0011] Wherein, the first rotor assembly and the second rotor assembly are respectively arranged at the two sides of the stator assembly, and the first rotor assembly and the second rotor assembly are fixedly connected with each other.

[0012] In the above technical scheme of the utility model, the utility model designs a new double rotor axial flux motor, the rotor assembly of the double rotor axial flux motor is designed and adopts cross coupling to drive connection first rotor assembly and second rotor assembly, at this time, the transmission between two rotor assemblies does not need to be connected by the same main shaft, and the user can consider the design scheme of split main shaft, the main shaft is arranged on the above first rotor assembly and second rotor assembly, and the above cross coupling is used for transmission connection, to reduce assembly difficulty, simplify assembly difficulty, realize lossless installation, to facilitate subsequent disassembly and maintenance.In addition, based on the above design, since cross coupling is used to replace traditional flat key, in actual application, the cross coupling and the cross recess of the above first rotor assembly and second rotor assembly can be correspondingly matched, the machining accuracy is reliable, the cooperation is precise, and the assembly accuracy can be effectively improved.

[0013] Meanwhile, the double-rotor axial flux motor is designed, and the structure of the plurality of stator windings of the stator assembly is further optimized, for example, in actual application, the winding shell of the stator assembly can be optimized in structure, so that when the plurality of stator windings are arranged in a circular ring shape, the adjacent two stator windings can be spliced with each other, the assembly difficulty can be effectively simplified, and the subsequent resin filling in the potting tool is not needed, subsequent disassembly and maintenance are facilitated, and the double-rotor axial flux motor has good popularization prospect and application value.

[0014] Further, in the double-rotor axial flux motor, the stator assembly comprises a hollow cavity extending in a first direction, and the cross shaft is arranged in the hollow cavity.

[0015] Further, in the double-rotor axial flux motor, the first rotor assembly comprises a first main shaft and a first rotor, and the second rotor assembly comprises a second main shaft and a second rotor; wherein the first rotor is sleeved on one end of the first main shaft close to the second rotor assembly, and the second rotor is sleeved on one end of the second main shaft close to the first rotor assembly.

[0016] In the above technical scheme of the utility model, the main shaft and the rotor in each rotor assembly do not need to be assembled under pressure, and the main shaft and the rotor can be realized without wear; meanwhile, due to the adoption of the design idea of the split main shaft, the above-mentioned main shaft and rotor are integrally designed in each rotor assembly, so that the overall manufacturing precision is high, the process is simple, the modular production is stable, and the consistency of parts is high.

[0017] Further, in the double-rotor axial flux motor, the first rotor and the second rotor each comprise: a mounting plate, a magnetic conducting ring, a magnetic steel positioning plate and a plurality of magnetic steel assemblies; a center circular hole is formed in the mounting plate, the center circular hole extends in a first direction and penetrates through the mounting plate; an annular boss is arranged on one side surface of the mounting plate, and the annular boss surrounds the center circular hole;

[0018] The side surface is further provided with an annular groove, the magnetic conducting ring is arranged in the annular groove, and a plurality of the magnetic steel assemblies are uniformly arranged in the annular groove and arranged on the magnetic conducting ring; the magnetic steel positioning plate is arranged in the annular groove, and the magnetic steel positioning plate is fixedly connected with the mounting plate, so as to position the positions of the plurality of magnetic steel assemblies in the annular groove.

[0019] Further, in the double-rotor axial flux motor, in the first rotor assembly, part of the cross recesses are formed on an end face of the first main shaft close to the second rotor assembly, and the other part of the cross recesses are formed on the annular boss of the first rotor.

[0020] In the second rotor assembly, part of the cross recesses are formed on an end face of the second main shaft close to the first rotor assembly, and the other part of the cross recesses are formed on the annular boss of the second rotor.

[0021] Further, in the double-rotor axial flux motor, the stator winding further comprises a core member and a conductive winding, the core member is sleeved in the winding shell, and the upright column of the winding shell is surrounded by the conductive winding.

[0022] Further, in the double-rotor axial flux motor, the winding shell comprises an upright column, the upper and lower ends of the upright column are respectively connected with cover plates, and the cross-sectional area of the cover plates is greater than that of the upright column; wherein a through groove is arranged in the upright column and extends through the upright column along the extension direction of the upright column; a receiving cavity in communication with the through groove is arranged in the cover plate, and a slot is further formed in the cover plate and in communication with the receiving cavity; the two side bevels of the cover plate are respectively provided with a flange guide rail and a concave guide rail.

[0023] In the above technical scheme, considering that the winding shell structure of the stator winding of the existing double-rotor axial flux motor is poor and subsequent splicing and positioning are difficult, the utility model optimizes and designs a new winding shell, which is designed and adopts an upright column and a cover plate to effectively accommodate the core member by the through groove in the upright column cooperating with the receiving cavity in the cover plate; at the same time, since the two side bevels of the cover plate are respectively provided with a flange guide rail and a concave guide rail, when multiple winding shells are assembled together subsequently, the bevels of the adjacent two winding shells can realize the concave-convex cooperation by the flange guide rail and the concave guide rail, so that the matching and splicing are completed, the splicing means is simple, the assembly difficulty can be effectively simplified, and subsequent filling of resin in the potting tool is not needed, which can facilitate subsequent disassembly and maintenance.

[0024] Further, in the double-rotor axial flux motor, the stator assembly further comprises an inner ring positioning member and a plurality of outer ring positioning blocks, the inner ring positioning member is arranged in a circular ring in which the plurality of stator windings are arranged in a circular ring shape, and the plurality of outer ring positioning blocks are arranged outside the circular ring in which the plurality of stator windings are arranged in a circular ring shape; wherein the cover plate is provided with an inner ring positioning groove matched with the inner ring positioning member and an outer ring positioning groove matched with the outer ring positioning member.

[0025] Further, in the double-rotor axial flux motor, the cover plate is further provided with a wire clamping groove, the conductive winding comprises an inlet wire head and an outlet wire head, the inlet wire head is clamped into the wire clamping groove formed in one end cover plate of the winding shell, and the outlet wire head is clamped into the wire clamping groove formed in the other end cover plate of the winding shell.

[0026] Further, the double-rotor axial flux motor, the iron core piece includes a plurality of iron cores, the plurality of iron cores are attached to each other, and the iron core includes an iron column and pole shoes arranged at two ends of the iron column.

[0027] The double-rotor axial flux motor has the advantages that the double-rotor axial flux motor is newly designed, the structure of the stator assembly and the rotor assembly is optimized, the first rotor assembly and the second rotor assembly are connected in transmission by the cross shaft, the same main shaft is not needed for connecting the two rotor assemblies, the design scheme of the split main shaft can be considered, the main shaft is arranged on each of the first rotor assembly and the second rotor assembly, and the cross shaft is used for transmission, so that the assembly difficulty is reduced, the assembly difficulty is simplified, lossless installation is realized, and subsequent disassembly and maintenance are facilitated.

[0028] Meanwhile, the wire winding shell of the stator winding is newly designed in the stator assembly, the flange guide rail and the recessed guide rail arranged on the two side bevels of the cover plate of the wire winding shell are used for assembly, the bevels of the wire winding shells of the two adjacent stator windings can be matched by the flange guide rail and the recessed guide rail when the plurality of stator windings are assembled together, so that the matching and splicing are completed, the splicing method is simple, the assembly difficulty is effectively simplified, and subsequent disassembly and maintenance are facilitated.

[0029] Therefore, the double-rotor axial flux motor is provided with two rotor assemblies and the cross shaft for transmission connection, so that synchronous movement of the two rotor assemblies of the double-rotor axial flux motor is realized, the cross shaft is used to replace the traditional flat key, so that the subsequent processing precision is reliable, the matching precision is good, the processing difficulty is low, the assembly precision is good, and the cross shaft is not easy to wear, the structure of the plurality of stator windings of the stator assembly is optimized, so that the two adjacent stator windings can be spliced when the plurality of stator windings are arranged in a circular ring shape, the stator winding does not need to be placed in the filling resin in the sealing tool, the stator winding does not overheat, the damaged stator winding can be effectively disassembled and repaired by the operator once a fault occurs, resources are recycled, and the double-rotor axial flux motor has good popularization prospect and application value. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 FIG. 1 is a structural schematic view of the double-rotor axial flux motor in one embodiment and one perspective view of the double-rotor axial flux motor in one embodiment of the utility model;

[0031] Figure 2 FIG. 2 is a structural schematic view of the double-rotor axial flux motor in one embodiment and another perspective view of the double-rotor axial flux motor in one embodiment of the utility model;

[0032] Figure 3 This is an exploded view of the structure of the dual-rotor axial flux motor described in this utility model under one embodiment;

[0033] Figure 4 This is a schematic diagram of the dual-rotor axial flux motor of the present invention, with the base, cooling fan and rear cover hidden in one embodiment.

[0034] Figure 5 for Figure 4 The exploded view of the dual-rotor axial flux motor shown is shown.

[0035] Figure 6 This is a schematic diagram of the main housing structure of the dual-rotor axial flux motor of the present invention in one embodiment;

[0036] Figure 7 This is a schematic diagram of the stator assembly and rotor assembly of the dual-rotor axial flux motor of the present invention in one embodiment.

[0037] Figure 8 for Figure 7 The exploded view of the stator and rotor assemblies shown is shown.

[0038] Figure 9 This is a schematic diagram of the stator assembly of the dual-rotor axial flux motor described in this utility model in one embodiment;

[0039] Figure 10 for Figure 9 The exploded view of the stator assembly shown is shown.

[0040] Figure 11 The diagram schematically shows a structure in which multiple stator windings are arranged in a circular pattern and connected to each other.

[0041] Figure 12 for Figure 11 The diagram shown is a structural schematic of the stator winding.

[0042] Figure 13 for Figure 12 A schematic diagram of the core components of the stator winding shown;

[0043] Figure 14 for Figure 12 The front view of the core component of the stator winding shown;

[0044] Figure 15 for Figure 12 A schematic diagram of the winding shell of the stator winding shown;

[0045] Figure 16 for Figure 12Structure schematic view of the winding shell of the stator assembly shown in the figure.

[0046] Figure 17 For Figure 9 Partial structure explosion view of the stator assembly shown in the figure.

[0047] Figure 18 For the structure front view of the stator wiring support of the stator assembly of the double-rotor axial flux motor in one embodiment of the utility model.

[0048] Figure 19 For the structure schematic view of the stator assembly of the double-rotor axial flux motor in another embodiment of the utility model.

[0049] Figure 20 For Figure 19 Structure schematic view of the winding shell of the stator assembly shown in the figure.

[0050] Figure 21 For the structure schematic view of the rotor assembly of the double-rotor axial flux motor in one embodiment of the utility model.

[0051] Figure 22 For the structure explosion schematic view of the rotor assembly of the double-rotor axial flux motor in one embodiment of the utility model from one perspective.

[0052] Figure 23 For the structure explosion schematic view of the rotor assembly of the double-rotor axial flux motor in one embodiment of the utility model from another perspective.

[0053] Figure 24 For Figure 23 The local enlarged view of A of the rotor assembly shown in the figure.

[0054] Figure 25 For the structure schematic view of the first rotor assembly of the double-rotor axial flux motor in one embodiment of the utility model.

[0055] Figure 26 For the structure explosion schematic view of the first rotor of the double-rotor axial flux motor in one embodiment of the utility model.

[0056] Figure 27 For the structure schematic view of the second rotor assembly of the double-rotor axial flux motor in one embodiment of the utility model.

[0057] Figure 28 For the structure explosion schematic view of the second rotor of the double-rotor axial flux motor in one embodiment of the utility model.

[0058] Figure 29The double-rotor axial flux motor is provided with a magnetic steel positioning plate.

[0059] Label explanation:

[0060] 1, motor shell; 11, main shell; 111, first fixed hole; 112, second fixed hole; 12, rear cover; 13, end cover; 14, sealing ring;

[0061] 2, base;

[0062] 3, heat dissipation blade;

[0063] 4, rotor assembly; 41, first rotor assembly; 411, first main shaft; 412, first rotor; 42, second rotor assembly; 421, second main shaft; 422, second rotor; 43, cross shaft coupling; 44, cross recess; 45, first screw; 46, second screw; 47, through hole; 48, magnetic ring; 49, positioning recess; 410, magnetic steel assembly;

[0064] 5, mounting plate; 51, center hole; 52, annular boss; 53, annular groove; 54, positioning boss;

[0065] 6, magnetic steel positioning plate; 61, annular part; 62, positioning hole; 63, locking part;

[0066] 7, stator assembly; 71, stator winding; 711, core piece; 7111, iron column; 7112, pole shoe; 7113, magnetic flux surface; 712, conductive winding; 7121, wire entry head; 7122, wire exit head; 713, winding shell; 72, inner ring positioning piece; 721, bayonet; 722, clamp; 73, outer ring positioning block; 74, stator wiring support; 741, circular ring-shaped insulating body; 742, threading hole; 743, wire slot; 744, screw hole; 745, avoidance hole; 746, three-phase power line; 747, first conductive flat cable; 748, second conductive flat cable;

[0067] 8, cover plate; 81, accommodating cavity; 82, notch; 83, inner ring positioning groove; 84, outer ring positioning groove; 85, first bevel; 86, second bevel; 87, wire clamping groove; 88, flange guide rail; 89, concave flange guide rail;

[0068] 9, stand; 91, through slot. DETAILED DESCRIPTION

[0069] In order to explain the technical content, the purpose and the effect of the utility model in detail, the following will be explained in combination with the embodiment and the drawings.

[0070] The research finds that the structure design of the existing double-rotor axial flux motor is still quite original, and the two rotors are generally connected and positioned with a motor spindle through a key, so that the motor spindle and the round hole of the rotor are over-matched to form a driving component that can rotate integrally; at this time, the long spindle is difficult to assemble, and it is easy to cause wear with other parts of the rotor assembly, and the assembly precision is poor.

[0071] Meanwhile, the inventor has found through research that the stator assembly of the existing double-rotor axial flux motor is generally composed of a plurality of identical single stator cores wound with copper wire windings arranged and spliced radially uniformly, and the single windings are connected in series or parallel to become a stator winding according to the connection order of generating an axial rotating magnetic field; at this time, the stator winding is bonded as a whole stator assembly through resin pouring and curing, and then the whole stator assembly is bonded with the stator shell through glue; such a stator assembly formed by resin curing and bonding not only has poor strength and insufficient precision, but also has the problems of subsequent heat dissipation difficulty and resource recycling difficulty.

[0072] Therefore, unlike the traditional double-rotor axial flux motor, as shown in Figure 1 and Figure 2 , the utility model designs a new double-rotor axial flux motor, which specifically comprises a motor shell 1, a base 2, and the base 2 is fixedly connected with the motor shell 1, so that the motor can be normally installed and placed in a vehicle.

[0073] It should be noted that, as shown in Figure 1 , Figure 2 and Figure 3 , in the embodiment, the motor shell 1 of the double-rotor axial flux motor is provided with a stator assembly 7, a rotor assembly 4 and a heat dissipation fin 3, one end of the rotor assembly 4 can extend out of one end cover 13 of the motor shell 1, the other end of the rotor assembly 4 can extend out of the other end cover 13 of the motor shell 1 and is connected with the heat dissipation fin 3, so as to drive the heat dissipation fin 3 to rotate around its own axis during the operation of the motor, thereby dissipating heat from the motor.

[0074] Among them, in order to ensure that the motor can be cooled smoothly, and at the same time improve the detachability of the motor, in the embodiment, the motor shell 1 of the double-rotor axial flux motor can specifically comprise: a main shell 11, a rear cover 12 and two end covers 13 arranged at both ends of the main shell 11; wherein the two end covers 13 are used to match the two ends of the main shell 11 respectively, and the connecting part can be sealed with a sealing ring 14 (see Figure 4 and Figure 5), to ensure that the main shell 11 inside can effectively accommodate the rotor assembly 4 and the stator assembly 7; and the rear cover 12 can also be connected with the main shell 11, and the inner cavity formed by the main shell 11 and the rear cover 12 can be used to set the heat dissipation blades 3, and in order to ensure heat dissipation, a plurality of air holes can be formed on the rear cover 12 to facilitate air circulation (see Figure 2 and Figure 3 ).

[0075] It should be particularly noted that the main shell 11 of the dual-rotor axial flux motor can be used to fix the stator assembly 7, so as to ensure that the stator assembly 7 is not easily displaced due to external application conditions, thereby causing the motor to malfunction; therefore, in the embodiment, referring to Figure 5 and Figure 6 it can be seen that the first fixing hole 111 and the second fixing hole 112 are further arranged on the inner cavity wall of the main shell 11 of the dual-rotor axial flux motor, and the first fixing hole 111 and the second fixing hole 112 can match the bolts to establish the fixed assembly of the stator assembly 7 and the main shell 11.

[0076] Referring to Figures 11-16 in the embodiment, the stator assembly 7 of the dual-rotor axial flux motor designed by the utility model is specifically formed by a plurality of stator windings 71 arranged in a circular ring shape, and adjacent two stator windings 71 are connected to each other, so that subsequent encapsulation of silica gel is not required, thereby simplifying the production process.

[0077] In the utility model, the inventor optimizes the structure of the winding shell 713 used in the stator winding 71, so that each stator winding 71 can be directly positioned and spliced without relying on external positioning tooling and without using encapsulation resin process, thereby effectively simplifying the production process.

[0078] Please refer to Figures 11 to 16 the winding shell 713 designed by the utility model can be a plastic part integrally injection molded, the winding shell 713 includes a column 9, and the upper and lower ends of the column 9 are respectively connected with a cover plate 8, the cover plate 8 is perpendicular to the extension direction of the column 9, and the cross-sectional area of the cover plate 8 is greater than the cross-sectional area of the column 9.

[0079] The reason why the cross-sectional area of the cover plate 8 is greater than the cross-sectional area of the column 9 is to facilitate the subsequent winding of the wire on the outer wall surface of the column 9, and the cover plate 8 at both ends of the column 9 can play a blocking role, so that the wire wound on the outer wall surface of the column 9 is not easily loosened from the winding shell 713.

[0080] Correspondingly, referring to Figure 15As shown, in this embodiment, the designed post 9 of the winding shell 713 is provided with a through slot 91, which is arranged through the post 9 along the extension direction of the post 9; meanwhile, the cover plate 8 at both ends of the post 9 is respectively provided with a containing cavity 81 communicated with the through slot 91, so as to jointly form a model cavity for wrapping the core member 711 based on the through slot 91 in the post 9 and the containing cavities 81 in the cover plates 8 at both ends. Among them, the size of the through slot 91 and the containing cavities 81 in the cover plates 8 at both ends of the post 9 is adaptively adjusted according to the size of the core member 711, and the containing cavities 81 in the cover plates 8 at both ends of the post 9 can be designed as a symmetrical structure capable of wrapping the pole shoe 7112 of the core member 711.

[0081] In this embodiment, a notch 82 is also formed on the cover plate 8 of the winding shell 713, which is used to communicate with the containing cavity 81 in the cover plate 8, so as to ensure that the magnetic flux surface 7113 of the subsequent core member 711 can be arranged corresponding to the notch 82, thereby ensuring that the stator assembly 7 can work normally. Among them, in order to avoid the core member 711 from being loosened out of the notch 82, in this embodiment, as shown in Figure 16 , the size of the notch 82 is specifically designed to be smaller than the size of the containing cavity 81 of the cover plate 8.

[0082] It should be noted that, as shown in Figure 15 and Figure 16 , in this embodiment, the cover plate 8 specifically includes an inner ring positioning groove 83, an outer ring positioning groove 84, a first bevel 85 and a second bevel 86, the first bevel 85 is provided with a flange guide rail 88, and the second bevel 86 is provided with a concave guide rail 89. Since, when assembling a plurality of stator windings 71 to prepare the stator assembly 7 as shown in Figure 11 , a single stator winding 71 can be spliced into a circular stator assembly 7 by the semicylindrical concave guide rail 89 and the flange guide rail 88 on the bevel of the winding shell 713.

[0083] Further referring to Figure 16 , when arranged, two wire clamping grooves 87 are also specifically formed on the cover plate 8 to clamp the wires by the wire clamping grooves 87.

[0084] Meanwhile, in actual application, in order to ensure that the plurality of stator windings 71 will not be displaced after the stator assembly 7 is assembled into the main shell 11, the hollow cavity extending along the first direction (i.e. the extension direction of the first main shaft 411 and the second main shaft 421) in the stator assembly 7 is also provided with an inner ring positioning piece 72 capable of abutting against the inner ring positioning groove 83 of each stator winding 71; meanwhile, a plurality of outer ring positioning blocks 73 are provided, and each stator winding 71 is correspondingly provided with two outer ring positioning blocks 73, which can be arranged on the upper and lower sides of the stator winding 71 and respectively abut against the outer ring positioning groove 84 of the stator winding 71, and the outer ring positioning blocks 73 can be fixedly connected to the first fixing hole 111 and the second fixing hole 112 in the main shell 11 through screws, so as to fix the position of each stator winding 71 in the main shell 11 and ensure the structural stability of the stator assembly 7.

[0085] As can be seen, based on the designed wire winding shell 713, referring to Figure 12 、 Figure 13 and Figure 14 , in the embodiment, the wire winding shell 713 of the utility model cooperates with the core member 711 and the conductive winding 712 to prepare a brand-new stator winding 71, i.e. Figure 12 the stator winding 71 shown in the figure.

[0086] Of course, it should be pointed out that, referring to Figure 19 and Figure 20 , in order to further improve the positioning effect of the stator assembly 7, in some other embodiments, a clamping piece 722 extending inward can be arranged on the cover plate 8 of the stator winding 71, and a clamping hole 721 is arranged on the inner ring positioning piece 72, so that when the inner ring positioning groove 83 of the stator winding 71 is correspondingly matched with the inner ring positioning piece 72, the clamping piece 722 on the cover plate 8 of the stator winding 71 can be correspondingly clamped into the clamping hole 721 of the inner ring positioning piece 72, thereby achieving secondary positioning.

[0087] In the embodiment, the core member 711 of the stator winding 71 is sleeved in the wire winding shell 713, and the conductive winding 712 is arranged around the column 9 of the wire winding shell 713; wherein the core member 711 comprises a plurality of cores, the plurality of cores are attached to each other, and each core comprises an iron column 7111 and a pole shoe 7112 arranged at both ends of the iron column 7111; wherein the pole shoe 7112 comprises a magnetic flux surface 7113, and the magnetic flux surfaces 7113 of the pole shoes 7112 of all the cores are in the same plane, and when the core member 711 is arranged in the wire winding shell 713, the magnetic flux surfaces 7113 of the pole shoes 7112 of all the cores are arranged opposite to the slot 82 of the cover plate 8 of the wire winding shell 713.

[0088] It should be noted that in actual application, the plurality of iron cores can be prepared from silicon steel sheets of different shapes and specifications, and the plurality of iron cores can be riveted together. Figure 16 As shown in the actual application, the iron column 7111 of the iron core can be completely wrapped around the through slot 91 in the stand 9 of the winding shell 713, and the pole shoe 7112 of the iron core is partially wrapped in the accommodating cavity 81 of the cover plate 8 of the winding shell 713. The magnetic flux surface 7113 of the pole shoe 7112 can be arranged in the slot 82 of the cover plate 8.

[0089] In addition, it should be noted that the conductive winding 712 sleeved on the outer circumferential surface of the stand 9 of the winding shell 713 also includes an incoming wire head 7121 and an outgoing wire head 7122. The incoming wire head 7121 of the conductive winding 712 can be correspondingly clamped into the wire clamping groove 87 formed in the cover plate 8 at one end of the winding shell 713, and the outgoing wire head 7122 can be correspondingly clamped into the wire clamping groove 87 formed in the cover plate 8 at the other end of the winding shell 713, so as to effectively fix the wire harness and facilitate subsequent wiring.

[0090] Correspondingly, in order to facilitate subsequent wiring, as shown in Figure 8 , Figure 9 , Figure 10 , Figure 17 and Figure 18 , in this embodiment, a new stator wiring support 74 is designed, which can be used to assist wiring, so that the operator can use the stator wiring support 74 to perform simple and error-free winding, thereby wiring the stator winding 71. It can be effectively arranged at one end of the plurality of stator windings 71. The operator can perform wiring according to the path of the wire slot 743 in the stator wiring support 74 to effectively reduce the wiring difficulty and ensure that the splicing of a single stator winding 71 does not need to be positioned in a direction and arranged in sequence, thereby reducing the error probability.

[0091] In this embodiment, the stator wiring support 74 specifically includes a circular ring-shaped insulating body 741 and a plurality of wire passing holes 742. The circular ring-shaped insulating body 741 is specifically arranged at one end of the plurality of stator windings 71, and the plurality of wire passing holes 742 are uniformly arranged on the upper surface of the circular ring-shaped insulating body 741 and penetrate the circular ring-shaped insulating body 741 from top to bottom. The upper surface of the circular ring-shaped insulating body 741 is also provided with a wire slot 743, which can avoid the positions of all wire passing holes 742, and is used to accommodate a first conductive flat cable 747. At least part of the wire passing holes 742 need to be in communication with the wire slot 743, so that the first conductive flat cable 747 arranged in the wire slot 743 can be electrically connected with the plurality of stator windings 71.

[0092] As shown in Figure 8As shown, in actual application, the wire-in heads 7121 of the plurality of stator windings 71 respectively extend into the wire-through holes 742 of the annular insulation main body 741 of the stator wiring support 74, and at least part of the wire-in heads 7121 of the stator windings 71 can be connected with the first conductive flat cables 747 in the wire grooves 743 of the annular insulation main body 741. In this embodiment, four first conductive flat cables 747 are arranged in the wire grooves 743 of the annular insulation main body 741, the four first conductive flat cables 747 are stacked and arranged, and the two ends of each first conductive flat cable 747 are provided with first connecting holes to connect the wire-in heads 7121 of different stator windings 71 through the first connecting holes; at the same time, the adjacent two first conductive flat cables 747 are not connected to avoid short circuit.

[0093] Correspondingly, in this embodiment, the wire-out heads 7122 of the adjacent two stator windings 71 can be connected through the second conductive flat cables 748. The two ends of the second conductive flat cables 748 are provided with second connecting holes to connect the wire-out heads 7122 of different stator windings 71 through the second connecting holes, which can be in the form of welding to fix the second conductive flat cables 748 and the wire-out heads 7122.

[0094] In addition, as shown, Figure 9 In this embodiment, the wire grooves 743 of the stator wiring support 74 of the stator assembly 7 also accommodate three-phase power lines 746, which can specifically include three wires for connecting the wire-in heads 7121 of three different stator windings 71; the wire-in heads 7121 of the stator windings 71 connected with the three-phase power lines 746 are no longer connected with the first conductive flat cables 747, and the first conductive flat cables 747 in the wire grooves 743 do not contact the first conductive flat cables 747 to improve safety.

[0095] In addition, as shown, Figure 18 The upper surface of the annular insulation main body 741 of the stator wiring support 74 is also provided with a plurality of screw holes 744 and a plurality of avoiding holes 745, and the wire grooves 743 avoid the positions of all the screw holes 744 and the avoiding holes 745. The screw holes 744 are provided to facilitate the fixation of the annular insulation main body 741 of the stator wiring support 74 and the main housing 11 by screws; the avoiding holes 745 are provided because the stator wiring support 74 needs to reserve avoiding holes 745 to avoid the screws for fixing the two rotors, so as not to interfere.

[0096] In summary, in this utility model, when assembling multiple stator windings 71, the semi-cylindrical flange guide rails 88 and concave flange guide rails 89 on the winding shell 713 of the stator windings 71 can be used to perform a concave-convex fit to complete the assembly and positioning of two stator windings 71, thereby obtaining the required stator assembly 7.

[0097] Accordingly, please refer to Figures 21 to 29 As shown, in this utility model, the rotor assembly 4 of the dual-rotor axial flux motor has also been optimized. The rotor assembly 4 includes: a first rotor assembly 41, a cross coupling 43, and a second rotor assembly 42. Both the first rotor assembly 41 and the second rotor assembly 42 have cross grooves 44. The cross coupling 43 is located between the first rotor assembly 41 and the second rotor assembly 42, specifically within the hollow cavity of the stator assembly 7. The cross coupling 43 is located within the cross grooves 44 of the first rotor assembly 41 and the second rotor assembly 42 to lock the relative rotational relationship between the first rotor assembly 41 and the second rotor assembly 42. The first rotor assembly 41 and the second rotor assembly 42 are fixedly connected to each other by screws, such as... Figure 3 The first screw 45 shown can be used to connect the first rotor assembly 41 and the second rotor assembly 42.

[0098] It should be noted that, in this embodiment, the stator assembly 7 is specifically disposed between the first rotor assembly 41 and the second rotor assembly 42 of the rotor assembly 4. The reason why the rotor assembly 4 is designed and uses a cross coupling 43 to connect the first rotor assembly 41 and the second rotor assembly 42 is to ensure that the transmission between the two rotor assemblies does not need to be connected by the same main shaft, thereby avoiding the use of a long main shaft, reducing the difficulty of processing and subsequent installation.

[0099] At this point, in this embodiment, as Figure 22 As shown, a main shaft and a rotor are respectively provided on the first rotor assembly 41 and the second rotor assembly 42 of the stator assembly 7, and are connected by the aforementioned cross coupling 43, thereby reducing the assembly difficulty, simplifying the assembly process, and achieving non-destructive installation, so as to facilitate subsequent disassembly and maintenance.

[0100] In this embodiment, since a cross coupling 43 is used to replace the traditional flat key, in practical applications, the cross coupling 43 can correspond and match the cross grooves 44 of the first rotor assembly 41 and the second rotor assembly 42. Its machining accuracy is reliable and the fit is precise, which can realize good promotion prospects and application value.

[0101] like Figure 22As shown in the embodiment, the first rotor assembly 41 of the rotor assembly 4 designed by the utility model includes a first main shaft 411 and a first rotor 412, and the second rotor assembly 42 includes a second main shaft 421 and a second rotor 422. Wherein, the first rotor 412 is sleeved on one end of the first main shaft 411 close to the second rotor assembly 42, the second rotor 422 is sleeved on one end of the second main shaft 421 close to the first rotor assembly 41, and the first rotor 412 and the second rotor 422 have a preset interval. The reason why the first rotor 412 and the second rotor 422 have a preset interval is to ensure that the first rotor 412 and the second rotor 422 can be arranged with the stator assembly 7 when the rotor assembly 4 is subsequently installed in the double-rotor axial flux motor.

[0102] Correspondingly, as Figure 21 shown in the embodiment, the first main shaft 411 and the second main shaft 421 of the rotor assembly 4 both extend along the first direction, and the first direction is specifically the direction perpendicular to the horizontal plane where the first rotor 412 and the second rotor 422 are located, that is, the first main shaft 411 is perpendicular to the first rotor 412, the second main shaft 421 is perpendicular to the second rotor 422, and the first rotor 412 and the second rotor 422 are arranged opposite to each other. At this time, in the double-rotor axial flux motor of the embodiment, the first main shaft 411 of the first rotor assembly 41 and the second main shaft 421 of the second rotor assembly 42 are both specifically sleeved with bearings when the rotor assembly 4 is actually arranged in the main housing 11, so as to facilitate the rotation of the first main shaft 411 and the second main shaft 421 relative to the main housing 11.

[0103] In addition, in the embodiment, a through hole 47 is formed in the first main shaft 411 and the second main shaft 421, and the through hole 47 extends along the first direction (that is, the extension direction of the first main shaft 411 and the second main shaft 421) and penetrates the first main shaft 411 or the second main shaft 421. In the above technical solution of the utility model, the main shaft and the rotor in each rotor assembly do not need to be assembled under pressure, and the main shaft and the rotor can be realized without wear.

[0104] In addition, as Figure 25 , Figure 26 , Figure 27 and Figure 28 shown in the embodiment, the first rotor 412 and the second rotor 422 in the rotor assembly 4 designed by the utility model both include an installation plate 5, a magnetic conducting ring 48, a magnetic steel positioning plate 6 and a plurality of magnetic steel assemblies 410.

[0105] As Figure 26 and Figure 28As shown, in the embodiment, a center circular hole 51 is formed on the mounting plate 5 of the first rotor 412 and the second rotor 422, the center circular hole 51 extends along a first direction and penetrates the mounting plate 5, at this time, the first direction is a direction perpendicular to the plate surface of the mounting plate 5; and, an annular boss 52 is further arranged on one side surface of the mounting plate 5, the annular boss 52 surrounds the center circular hole 51 on the mounting plate 5; wherein, an annular groove 53 is further formed on the side surface, the magnetic conducting ring 48 is arranged in the annular groove 53, the plurality of magnetic steel assemblies 410 are uniformly arranged in the annular groove 53 and arranged on the magnetic conducting ring 48; at the same time, the magnetic steel positioning plate 6 is arranged in the annular groove 53, and the magnetic steel positioning plate 6 is fixedly connected with the mounting plate 5, so as to position the positions of the plurality of magnetic steel assemblies 410 in the annular groove 53.

[0106] It should be noted that, in the embodiment, in order to ensure that the first main shaft 411 can be in transmission connection with the second main shaft 421, in the rotor assembly 4 designed in the utility model, part of the cross recesses 44 in the first rotor assembly 41 are formed on an end surface of the first main shaft 411 close to the second rotor assembly 42, and the other part of the cross recesses 44 are formed on the annular boss 52 of the first rotor 412 (see Figure 25 ). Figure 27

[0107] And referring to Figure 29 It can be seen that, in the embodiment, the magnetic steel positioning plate 6 arranged on the mounting plate 5 of the first rotor 412 and the second rotor 422 specifically comprises: an annular portion 61 and a plurality of locking portions 63, the annular portion 61 is provided with a positioning hole 62, and the mounting plate 5 is fixedly connected with the second screw 46; wherein, one end of the plurality of locking portions 63 is connected with the annular portion 61, and the other end of the plurality of locking portions 63 extends away from the annular portion 61, so that the locking portion 63 abuts against the magnetic steel assembly 410, thereby effectively limiting the position of the magnetic steel assembly 410.

[0108] It should be noted that, in the embodiment, the magnetic conducting ring 48 is made of a silicon steel strip and then assembled in the annular groove 53 of the mounting plate 5; the magnetic steel assembly 410 has a permanent magnet characteristic and is adsorbed on the plane of the magnetic conducting ring 48 through magnetic attraction force; for example Figure 29 ​As shown, the magnetic steel positioning plate 6 is designed with a stepped shape consistent with the shape of the magnetic steel assembly 410, and the magnetic steel assembly 410 is sequentially arranged and installed; the magnetic steel positioning plate 6 is locked by the second screw, so as to connect the magnetic steel positioning plate 6 with the mounting plate 5, and press the magnetic conducting ring 48 in the annular groove 53 of the mounting plate 5.

[0109] Meanwhile, as shown in Figure 26 、 Figure 28 In the embodiment, the inner wall of the center circular hole 51 of the first rotor 412 and the second rotor 422 is provided with a positioning boss 54, and one end of the first main shaft 411 and the second main shaft 421 extending into the center circular hole 51 is provided with a positioning groove 49 matched with the positioning boss 54.

[0110] It should be noted that in the embodiment, the positioning boss 54 provided on the inner wall of the center circular hole 51 of the first rotor 412 and the second rotor 422 is a symmetrical cylindrical flat positioning structure fixed in cooperation with the design of the positioning groove 49 of the main shaft, so as to ensure the positioning and connecting strength of the rotor and the main shaft, and form a rotor assembly.

[0111] In actual application, in the embodiment, a thread for convenient installation and disassembly can also be designed on the other end of the first main shaft 411 away from the first rotor 412 and the other end of the second main shaft 421 away from the second rotor 422, and the thread is specifically arranged in the through hole 47 of the first main shaft 411 and the second main shaft 421; at the same time, in order to facilitate the subsequent bearing sleeved on the first main shaft 411 and the second main shaft 421, a step matching position connected with the bearing can also be designed on the first main shaft 411 and the second main shaft 421 (see Figure 23 ).

[0112] In the embodiment, the second rotor assembly 42 (equivalent to a rear-end rotor assembly, used for connecting the heat dissipation fin 3) and the first rotor assembly 41 (equivalent to an output-end rotor assembly, used for extending out of the motor shell 1) are in a symmetrical structure, and all the structural parts are the same except that the second main shaft 421 is different from the first main shaft 411; the length of the second main shaft 421 is different from that of the first main shaft 411 due to the installation requirement of external equipment, so as to be used for installing the heat dissipation fin 3.

[0113] As can be seen from the above, in the utility model, the working principle of the rotor assembly 4 applied to the double-rotor axial flux motor is that the first rotor assembly 41 and the second rotor assembly 42 are positioned and connected through the cross shaft coupling 43, are locked firmly by screws, form an integral motor driving rotating part, and are subjected to dynamic balance correction, so that the motor can be assembled and disassembled repeatedly, the precision is stable, and the motor is firm and reliable.

[0114] The designed stator assembly 7 applied to the double-rotor axial flux motor has simple and compact structure assembly, does not need to rely on a tool to complete, and the multiple stator windings 71 are self-locked and reliable, do not need to be bonded, the strength is obviously improved, and can bear a large load torque.

[0115] Therefore, the double-rotor axial flux motor can solve the problems of high assembly difficulty, poor assembly precision, easy wear, poor strength, insufficient precision, subsequent heat dissipation difficulty and resource recovery difficulty caused by the fact that the stator assembly 7 is formed by resin curing and bonding during assembly of the rotor assembly 4 of the existing double-rotor axial flux motor, and has good popularization prospect and application value.

[0116] The above is only an embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent transformation, direct or indirect application in related technical fields by using the content of the utility model specification and drawings are also included in the patent protection range of the utility model.

Claims

1. A dual rotor axial flux electric machine characterized by, The utility model relates to a kind of motor, including: Stator assembly, it includes multiple stator windings, multiple the stator windings are annularly arranged, and the winding shell of adjacent two stator windings is connected with each other; Rotor assembly, it includes first rotor assembly, cross coupling and second rotor assembly, cross recess is opened on the first rotor assembly and second rotor assembly, the cross coupling is arranged between the first rotor assembly and second rotor assembly, and the cross coupling is arranged in the cross recess of the first rotor assembly, second rotor assembly, to lock the relative rotation relationship of the first rotor assembly, second rotor assembly; Wherein, the first rotor assembly and the second rotor assembly are respectively arranged at the two sides of the stator assembly, and the first rotor assembly and the second rotor assembly are fixedly connected with each other.

2. The dual-rotor axial flux electric machine of claim 1, wherein, The stator assembly includes hollow cavity extending along the first direction, and the cross coupling is arranged in the hollow cavity.

3. The dual-rotor axial flux electric machine of claim 1, wherein, The first rotor assembly includes first spindle and first rotor, and the second rotor assembly includes second spindle and second rotor;Wherein, the first rotor is sleeved on the one end of the first spindle close to the second rotor assembly, and the second rotor is sleeved on the one end of the second spindle close to the first rotor assembly.

4. The dual-rotor axial flux electric machine of claim 3, wherein, The first rotor and the second rotor each include a mounting plate, a magnetic conducting ring, a magnetic steel positioning plate, and a plurality of magnetic steel assemblies. The mounting plate has a central circular hole extending along a first direction and penetrating through the mounting plate. An annular boss is provided on one side surface of the mounting plate, and the annular boss surrounds the central circular hole. Wherein, the side surface is also provided with an annular groove, the magnetic conducting ring is arranged in the annular groove, and a plurality of the magnetic steel assemblies are uniformly arranged in the annular groove and on the magnetic conducting ring. The magnetic steel positioning plate is arranged in the annular groove and is fixedly connected with the mounting plate to position the plurality of magnetic steel assemblies in the annular groove.

5. The dual-rotor axial flux electric machine of claim 4, wherein, In the first rotor assembly, part of the cross recesses are arranged on the end face of the first spindle close to the second rotor assembly, and the other part of the cross recesses are arranged on the annular boss of the first rotor. In the second rotor assembly, part of the cross recesses are arranged on the end face of the second spindle close to the first rotor assembly, and the other part of the cross recesses are arranged on the annular boss of the second rotor.

6. The dual-rotor axial flux electric machine of claim 1, wherein, The stator winding further includes a core member and a conductive winding, the core member is sleeved in the winding shell, and the conductive winding is arranged around the column of the winding shell.

7. The dual-rotor axial flux electric machine of claim 6, wherein, The winding shell includes a column, the upper and lower ends of the column are respectively connected with cover plates, and the cross-sectional area of the cover plate is larger than that of the column. Wherein, a through groove is arranged in the column and penetrates through the column along the extension direction of the column. A receiving cavity is arranged in the cover plate and communicates with the through groove. A slot is further arranged on the cover plate and communicates with the receiving cavity. Flange guide rails and recessed guide rails are arranged on the two side edges of the cover plate.

8. The dual-rotor axial flux electric machine of claim 7, wherein, The stator assembly further comprises an inner ring positioning member and a plurality of outer ring positioning blocks, the inner ring positioning member is arranged in a ring in which the plurality of stator windings are arranged in a circular ring shape, and the plurality of outer ring positioning blocks are arranged outside the ring in which the plurality of stator windings are arranged in a circular ring shape; wherein the cover plate is provided with an inner ring positioning groove matched with the inner ring positioning member and an outer ring positioning groove matched with the outer ring positioning blocks.

9. The dual-rotor axial flux electric machine of claim 7, wherein, The cover plate is further provided with a wire clamping groove, the conductive winding comprises an incoming wire head and an outgoing wire head, the incoming wire head is clamped into the wire clamping groove provided on one end cover plate of the winding shell, and the outgoing wire head is clamped into the wire clamping groove provided on the other end cover plate of the winding shell.

10. The dual-rotor axial flux electric machine of claim 6, wherein, The core member comprises a plurality of cores, the plurality of cores are attached to each other, and the core comprises an iron column and pole shoes arranged at both ends of the iron column; wherein the pole shoes comprise a magnetic flux surface, and the magnetic flux surfaces of the pole shoes of all the cores are in the same plane.

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