Double-rotor motor based on axial flux motor and vehicle

Abstract

The invention discloses a double-rotor motor based on an axial flux motor, and relates to the technical field of motors, a stator defines a first slot structure and a second slot structure, the first slot structure and the second slot structure are opened towards two sides along the axial direction of the double-rotor motor, and the first slot structure sleeves the outer side of the second slot structure along the radial direction of the double-rotor motor. The first slot structure is used for accommodating the first winding, and the second slot structure is used for accommodating the second winding; the first rotor and the second rotor are coaxial. Therefore, the first winding and the second winding can be mutually independent, the first rotor and the second rotor can be independently controlled, the control freedom degree of the double-rotor motor is improved, and the dynamic response of complex working conditions is met; the axial length of the double-rotor motor is shortened, and the compactness of the double-rotor motor is greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a dual-rotor motor based on an axial flux motor and a vehicle. Background Art

[0002] In the related technology, existing motors are unable to achieve independent torque / speed control of the rotors on both sides, resulting in insufficient dynamic response under complex working conditions (such as the differential speed requirement of the left and right wheels when electric vehicles turn). In addition, existing motors usually require two independent motors to be axially connected in series, resulting in a large axial length and low axial space utilization, which makes it difficult to meet the layout requirements of compact vehicles. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a dual-rotor motor based on an axial flux motor, in which the two rotors on each side are independently controlled and the axial space utilization rate is high.

[0004] The present invention further provides a vehicle.

[0005] According to the present invention, the dual-rotor motor based on the axial flux motor includes: a stator, a first winding, a second winding, a first rotor, and a second rotor. The stator defines a first slot structure and a second slot structure. Along the axial direction of the dual-rotor motor, the first slot structure and the second slot structure are open to both sides respectively, and along the radial direction of the dual-rotor motor, the first slot structure is sleeved on the outside of the second slot structure. The first slot structure is used to accommodate the first winding, and the second slot structure is used to accommodate the second winding; the first rotor and the second rotor are coaxially arranged.

[0006] According to the dual-rotor motor based on the axial flux motor of the present invention, a first slot structure for accommodating the first winding and a second slot structure for accommodating the second winding are defined by the stator, so that the first winding and the second winding can be independent of each other, and the first rotor and the second rotor can be independently controlled, thereby improving the control freedom of the dual-rotor motor and meeting the dynamic response of complex working conditions. In addition, by arranging the first slot structure on the outside of the second slot structure and arranging the first rotor and the second rotor coaxially, the axial length of the dual-rotor motor is shortened, and the compactness of the dual-rotor motor is greatly improved.

[0007] In some examples of the present invention, the first rotor includes: a first rotor body and a first rotor shaft, the first rotor body is transmission-connected to the first rotor shaft, the second rotor includes: a second rotor body and a second rotor shaft, the second rotor body is transmission-connected to the second rotor shaft, and along the axial direction of the dual-rotor motor, the first rotor body is located on the side where the first slot structure is open, and the second rotor body is located on the side where the second slot structure is open.

[0008] In some examples of the present invention, the diameter of the first rotor body is greater than the diameter of the second rotor body, and along the axial direction of the dual-rotor motor, the orthographic projection of the first rotor body and the orthographic projection of the first slot structure have an overlapping area, and the orthographic projection of the second rotor body and the orthographic projection of the second slot structure have an overlapping area.

[0009] In some examples of the present invention, the stator includes a first sub-section and a second sub-section, the first sub-section is sleeved on the outside of the second sub-section and connected to the second sub-section, the first sub-section defines the first slot structure, and the second sub-section defines the second slot structure. Along the axial direction of the dual-rotor motor, the thickness of the second sub-section is less than the thickness of the first sub-section, and the first sub-section and the second sub-section jointly define a placement space, and at least a portion of the second rotor body is accommodated in the placement space.

[0010] In some examples of the present invention, along the axial direction of the dual-rotor motor, the first sub-section and the second sub-section are flush with one side of the first rotor body, the side of the first sub-section facing away from the first rotor body is flush with the side of the second rotor body facing away from the second sub-section, and the stator is constructed as an integrally formed part.

[0011] In some examples of the present invention, the stator defines a fitting hole, and the first rotor shaft and the second rotor shaft are both inserted into the fitting hole.

[0012] In some examples of the present invention, the dual-rotor motor further includes: a bidirectional thrust bearing, which is disposed in the matching hole and matches both the first rotor shaft and the second rotor shaft.

[0013] In some examples of the present invention, along the radial direction of the dual-rotor motor, the inner wall of the first slot structure is configured as the outer wall of the second slot structure.

[0014] In some examples of the present invention, the first rotor is used for driving, and the second rotor is used for generating electricity.

[0015] The vehicle according to the present invention comprises the above-mentioned dual-rotor motor based on the axial flux motor, and the dual-rotor motor is used to generate electricity and / or drive the vehicle.

[0016] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which: Figure 1 is an exploded view of a dual-rotor motor based on an axial flux motor according to an embodiment of the present invention; Figure 2 is a schematic structural diagram of a stator according to an embodiment of the present invention (first perspective); Figure 3 is a schematic structural diagram of a stator according to an embodiment of the present invention (second perspective); Figure 4 is a schematic structural diagram of a stator according to an embodiment of the present invention (third perspective); Figure 5 is a cross-sectional view of a dual-rotor motor based on an axial flux motor according to an embodiment of the present invention.

[0018] Reference numerals: Dual-rotor motor 100; stator 1; first sub-section 11; first slot structure 111; second sub-section 12; second slot structure 121; placement space 13; matching hole 14; first stator tooth 15; second stator tooth 16; First winding 2; Second winding 3; First rotor 4; first rotor body 41; first rotor shaft 42; first mounting hole 43; Second rotor 5; second rotor body 51; second rotor shaft 52; second mounting hole 53; Bidirectional thrust bearing 6; Shell body 7; first receiving hole 71; Cover body 8; second receiving hole 81; receiving space 82; Tapered roller bearings 9. DETAILED DESCRIPTION

[0019] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0020] Reference below Figure 1-Figure 5 A dual-rotor motor 100 based on an axial flux motor according to an embodiment of the present invention is described.

[0021] like Figure 1 As shown, the dual-rotor motor 100 based on the axial flux motor according to the embodiment of the present invention includes: a stator 1, a first winding 2, a second winding 3, a first rotor 4, and a second rotor 5. The stator 1 defines a first slot structure 111 and a second slot structure 121. Figure 1 、 Figure 5 In the X direction shown in FIG, the first slot structure 111 and the second slot structure 121 are open toward both sides, and are arranged along the radial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 In the Y direction shown in the figure), the first slot structure 111 is sleeved on the outside of the second slot structure 121. The first slot structure 111 is used to accommodate the first winding 2, and the second slot structure 121 is used to accommodate the second winding 3. The first rotor 4 and the second rotor 5 are coaxially arranged.

[0022] The stator 1 defines a first slot structure 111 and a second slot structure 121. In some embodiments of the present application, the first slot structure 111 and the second slot structure 121 can be constructed as an annular slot structure. Figure 1 、 Figure 5 In the X direction shown in FIG, the first slot structure 111 and the second slot structure 121 are open toward both sides, respectively. As some embodiments of the present application, for example Figure 5 As shown, the first slot structure 111 is along the axial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 The second slot structure 121 extends along the axial direction of the dual-rotor motor 100 (ie, the X direction shown in FIG. 1 ) and opens to the right. Figure 1 、 Figure 5 As some embodiments of the present application, the first slot structure 111 extends along the axial direction of the dual-rotor motor 100 (i.e., the X direction shown in FIG. 1 ). Figure 1 、 Figure 5 The second slot structure 121 extends along the axial direction of the dual-rotor motor 100 (ie, the X direction shown in FIG. 1 ) and opens to the left. Figure 1 、 Figure 5 The outer surface of the housing extends (in the X direction shown) and is open to the right.

[0023] Along the radial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 In the Y direction shown in FIG. 1 ), the first slot structure 111 is sleeved on the outside of the second slot structure 121. That is, the inner diameter of the first slot structure 111 is larger than the outer diameter of the second slot structure 121. Figure 2-Figure 5 As shown, the first slot structure 111 is sleeved on the outside of the second slot structure 121 .

[0024] The first slot structure 111 is used to accommodate the first winding 2 , that is, the first winding 2 is placed in the first slot structure 111 . The second slot structure 121 is used to accommodate the second winding 3 , that is, the second winding 3 is placed in the second slot structure 121 .

[0025] It should be noted that the first rotor 4 and the second rotor 5 of the dual-rotor motor 100 of the present application can be controlled independently. As some embodiments of the present application, the stator 1 defines a first slot structure 111 for accommodating the first winding 2 and a second slot structure 121 for accommodating the second winding 3. The first winding 2 and the second winding 3 are independent of each other. The first winding 2 can be connected to the first inverter, and the second winding 3 can be connected to the second inverter. When the second rotor 5 is connected to the engine, the power of the engine drives the second rotor 5 to rotate, generating a three-phase current in the second winding 3. The three-phase current can be rectified by the second inverter to charge the power battery. When the power battery inputs current to the first winding 2 through the first inverter, an alternating magnetic field is generated in the air gap between the first rotor 4 and the first winding 2, driving the first rotor 4 to rotate and output power to the outside, so that the first rotor 4 is used for driving and the second rotor 5 is used for power generation, that is, the first winding 2 and the first rotor 4 are combined for driving, and the second winding 3 and the second rotor 5 are combined for power generation.

[0026] In some embodiments of the present application, one side of the rotor of the dual-rotor motor 100 of the present application can be used for driving, and the other side of the rotor can be used for power generation, that is, the first winding 2 is combined with the first rotor 4 for power generation, and the second winding 3 is combined with the second rotor 5 for driving. In some embodiments of the present application, both sides of the rotor of the dual-rotor motor 100 of the present application can be used for driving, that is, the first winding 2 is combined with the first rotor 4 for power generation, and the second winding 3 is combined with the second rotor 5 for power generation. In some embodiments of the present application, both sides of the rotor of the dual-rotor motor 100 of the present application can be used for power generation, that is, the first winding 2 is combined with the first rotor 4 for power generation, and the second winding 3 is combined with the second rotor 5 for power generation. The dual-rotor motor 100 has a high degree of control freedom and can meet the dynamic response requirements of complex working conditions. The first slot structure 111 is sleeved on the outside of the second slot structure 121, and the first rotor 4 and the second rotor 5 are coaxially arranged. This arrangement can make the axial dimension of the dual-rotor motor 100 smaller and the components within the dual-rotor motor 100 more compact.

[0027] Therefore, by defining a first slot structure 111 for accommodating the first winding 2 and a second slot structure 121 for accommodating the second winding 3 by the stator 1, the first winding 2 and the second winding 3 can be made independent of each other, and the first rotor 4 and the second rotor 5 can be independently controlled, thereby improving the control freedom of the dual-rotor motor 100 and meeting the dynamic response of complex working conditions. In addition, by arranging the first slot structure 111 on the outside of the second slot structure 121 and arranging the first rotor 4 and the second rotor 5 coaxially, the axial length of the dual-rotor motor 100 is shortened, and the compactness of the dual-rotor motor 100 is greatly improved.

[0028] It should be noted that the dual-rotor motor 100 proposed in this application is an axial flux motor. An axial flux motor has a planar air gap, an axial magnetic field, and an axial magnetic flux flow along the motor's axis. This motor is also known as a disc motor. Axial magnetic field motors offer advantages such as compact structure, small size, light weight, and high torque density. Their flat appearance makes them particularly suitable for applications where installation space is strictly limited.

[0029] In some embodiments of the present invention, Figure 1 and Figure 5 As shown, the first rotor 4 includes: a first rotor body 41 and a first rotor shaft 42, the first rotor body 41 is transmission-connected to the first rotor shaft 42, the second rotor 5 includes: a second rotor body 51 and a second rotor shaft 52, the second rotor body 51 is transmission-connected to the second rotor shaft 52, along the axial direction of the dual-rotor motor 100 (i.e. Figure 1 、 Figure 5 (X direction shown in the figure), the first rotor body 41 is located on the open side of the first slot structure 111, and the second rotor body 51 is located on the open side of the second slot structure 121.

[0030] The first rotor body 41 is connected to the first rotor shaft 42 by transmission. For example, the first rotor body 41 and the first rotor shaft 42 can be connected by transmission by means of a key connection, a pin connection, etc., or the first rotor body 41 and the first rotor shaft 42 can be integrally formed. As some embodiments of the present application, such as Figure 1 As shown, the first rotor body 41 may have a first mounting hole 43 adapted to the first rotor shaft 42 . The first rotor body 41 may be sleeved on the first rotor shaft 42 and be in transmission connection with the first rotor shaft 42 .

[0031] The second rotor body 51 is connected to the second rotor shaft 52 by transmission. For example, the second rotor body 51 and the second rotor shaft 52 can be connected by transmission by means of a key connection, a pin connection, etc., or the second rotor body 51 and the second rotor shaft 52 can be integrally formed. Figure 1 As shown, the second rotor body 51 may have a second mounting hole 53 adapted to the second rotor shaft 52 . The second rotor body 51 may be sleeved on the second rotor shaft 52 and be in transmission connection with the second rotor shaft 52 .

[0032] As some embodiments of the present application, the first rotor shaft 42 and the second rotor shaft 52 may be constructed as transmission shafts with the same structure to facilitate production.

[0033] Along the axial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5In the X direction shown in the figure), the first rotor body 41 and the second rotor body 51 are respectively arranged on both sides of the stator 1. Specifically, the first rotor body 41 is located on the side where the first slot structure 111 is opened, and the second rotor body 51 is located on the side where the second slot structure 121 is opened. It should be noted that the first rotor shaft 42 and the second rotor shaft 52 can serve as the output shafts of the dual-rotor motor 100.

[0034] Such an arrangement can make the arrangement positions of the first rotor body 41 and the second rotor body 51 reasonable, and is conducive to generating an alternating magnetic field in the air gap between the first rotor 4 and the first winding 2, and is conducive to generating an alternating magnetic field in the air gap between the second rotor 5 and the second winding 3, so that the dual-rotor motor 100 can reliably output power, and in this way, the dual-rotor motor 100 of the present application can have a reasonable structure and be easy to assemble.

[0035] In some embodiments of the present invention, Figure 1 and Figure 5 As shown, the diameter of the first rotor body 41 is larger than the diameter of the second rotor body 51, and along the axial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 In the X direction shown in FIG, the orthographic projection of the first rotor body 41 and the orthographic projection of the first slot structure 111 have an overlapping area, and the orthographic projection of the second rotor body 51 and the orthographic projection of the second slot structure 121 have an overlapping area.

[0036] Specifically, a plane is set, which is parallel to the axial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 In other words, the normal of the plane is perpendicular to the axial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 The orthographic projection of the first rotor body 41 on this plane overlaps with the orthographic projection of the first slot structure 111 on this plane. Furthermore, the first rotor body 41 corresponds to the open end of the first slot structure 111. The orthographic projection of the second rotor body 51 on this plane overlaps with the orthographic projection of the second slot structure 121 on this plane. Furthermore, the second rotor body 51 corresponds to the open end of the second slot structure 121. This arrangement ensures that the dimensions and forms of the first and second rotor bodies 41 and 51 are reasonable, facilitating the generation of an alternating magnetic field within the air gap between the first winding 2 and the first rotor body 41, and within the air gap between the second rotor 5 and the second winding 3. This allows the dual-rotor motor 100 to reliably output power. Furthermore, since the power generation demand is generally low while the driving power demand is high, the first rotor 4 can be used for driving and the second rotor 5 for power generation, resulting in a rational structure and highly competitive product for the dual-rotor motor 100.

[0037] In some embodiments of the present invention, Figure 2-Figure 5 As shown, the stator 1 includes a first sub-section 11 and a second sub-section 12. The first sub-section 11 is sleeved outside the second sub-section 12 and connected to the second sub-section 12. The first sub-section 11 defines a first slot structure 111, and the second sub-section 12 defines a second slot structure 121. Figure 1 、 Figure 5 The thickness of the second sub-portion 12 is less than that of the first sub-portion 11 . The first sub-portion 11 and the second sub-portion 12 together define a placement space 13 . At least a portion of the second rotor body 51 is accommodated in the placement space 13 .

[0038] Among them, the first sub-section 11 is sleeved on the outside of the second sub-section 12, and the first sub-section 11 and the second sub-section 12 can be fixedly connected. For example, the connection method between the first sub-section 11 and the second sub-section 12 can be but not limited to welding connection, clamping connection, etc., or the first sub-section 11 and the second sub-section 12 can be integrally formed. As some embodiments of the present application, the first sub-section 11 is sleeved on the second sub-section 12, and the first sub-section 11 and the second sub-section 12 are integrally formed, and the inner diameter of the first sub-section 11 is equal to the outer diameter of the second sub-section 12.

[0039] The first sub-section 11 defines a first slot structure 111, and the second sub-section 12 defines a second slot structure 121. The first sub-section 11 and the second sub-section 12 are shared, which is beneficial to improving the performance of the dual-rotor motor 100.

[0040] Along the axial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 The thickness of the second sub-section 12 is smaller than the thickness of the first sub-section 11. Specifically, along the axial direction of the dual-rotor motor 100 (ie, Figure 1 、 Figure 5 (See the X direction shown in the figure) a gap is formed between the end of the first sub-section 11 proximal to the second rotor body 51 and the end of the second sub-section 12 proximal to the second rotor body 51, so that the first sub-section 11 and the second sub-section 12 jointly define a placement space 13. At least a portion of the second rotor body 51 is accommodated in the placement space 13. In some embodiments of the present application, a portion of the second rotor body 51 is accommodated in the placement space 13. In some embodiments of the present application, the entire second rotor body 51 is accommodated in the placement space 13.

[0041] By accommodating at least a portion of the second rotor body 51 in the placement space 13 , the axial length of the dual-rotor motor 100 can be reduced, the axial space utilization of the dual-rotor motor 100 of the present application can be improved, and the structural compactness can be enhanced.

[0042] In some embodiments of the present invention, Figure 5As shown, along the axial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 In the X direction shown in the figure), the first sub-section 11 and the second sub-section 12 are flush with one side of the first rotor body 41, and the side of the first sub-section 11 facing away from the first rotor body 41 is flush with the side of the second rotor body 51 facing away from the second sub-section 12. The stator 1 is constructed as an integrally formed part.

[0043] Among them, along the axial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 In the X direction shown in the figure, the thickness of the second sub-section 12 is less than that of the first sub-section 11. The first sub-section 11 and the second sub-section 12 are flush with each other on the side facing the first rotor body 41. There is a certain distance between the side of the first sub-section 11 facing away from the first rotor body 41 and the side of the second sub-section 12 facing away from the first rotor body 41. The first sub-section 11 and the second sub-section 12 jointly define a placement space 13. The entire first rotor body 41 is accommodated in the placement space 13. The side of the first sub-section 11 facing away from the first rotor body 41 is flush with the side of the second rotor body 51 facing away from the second sub-section 12.

[0044] The stator 1 is constructed as an integrally molded part. In other words, the first sub-part 11 and the second sub-part 12 are constructed as an integrally molded part. The integrally molded part has good structural strength. By integrally molding the first sub-part 11 and the second sub-part 12, the connection reliability between the first sub-part 11 and the second sub-part 12 can be improved, and the risk of breakage at the connection between the first sub-part 11 and the second sub-part 12 can be reduced, thereby improving the reliability of the stator 1 and improving the production efficiency of the stator 1. In addition, the assembly difficulty of the dual-rotor motor 100 can be reduced.

[0045] This arrangement enables the stator 1 and the second rotor body 51 to be formed as a whole along the radial direction of the dual-rotor motor 100 (i.e. Figure 1 、 Figure 5 The outer surfaces on both sides (in the Y direction shown) are flush, and the components of the dual-rotor motor 100 can be arranged neatly, which can significantly reduce the axial length of the dual-rotor motor 100.

[0046] In some embodiments of the present invention, Figure 2-Figure 5 As shown, the stator 1 defines a matching hole 14 , and the first rotor shaft 42 and the second rotor shaft 52 are both inserted into the matching hole 14 .

[0047] The stator 1 defines a matching hole 14. As some embodiments of the present application, the matching hole 14 can be configured to be along the axial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 The through hole structure of the stator 1 is penetrated in the X direction as shown in FIG. 1 , and the through hole structure of the stator 1 is penetrated in the radial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5(Y direction as shown in the figure) The mating hole 14 is located at the geometric center of the stator 1. The first rotor shaft 42 and the second rotor shaft 52 are both inserted into the mating hole 14. In some embodiments of the present application, the mating hole 14 is adapted to fit the first rotor shaft 42 and the second rotor shaft 52. In addition, the end of the first rotor shaft 42 closer to the stator 1 is inserted into the mating hole 14, and the end of the second rotor shaft 52 closer to the stator 1 is inserted into the mating hole 14.

[0048] In some embodiments of the present application, the diameters of one end of the first rotor shaft 42 close to the stator 1 and the diameters of one end of the second rotor shaft 52 close to the stator 1 are equal, and the first rotor shaft 42 and the second rotor shaft 52 are coaxially arranged.

[0049] Such an arrangement allows the first rotor shaft 42, the second rotor shaft 52, and the stator 1 to share a portion of the axial dimension (i.e., a portion of the first rotor shaft 42 is located in the matching hole 14, and a portion of the second rotor shaft 52 is located in the matching hole 14), thereby significantly reducing the axial length of the dual-rotor motor 100, improving the axial space utilization of the dual-rotor motor 100 of the present application, and enhancing the structural compactness.

[0050] In some embodiments of the present invention, Figure 1 and Figure 5 As shown, the dual-rotor motor 100 based on the axial flux motor further includes: a bidirectional thrust bearing 6 , which is disposed in the matching hole 14 and matches both the first rotor shaft 42 and the second rotor shaft 52 .

[0051] The bidirectional thrust bearing 6 is provided in the matching hole 14 , and the bidirectional thrust bearing 6 and the matching hole 14 may be interference fit, transition fit, etc.

[0052] The bidirectional thrust bearing 6 is matched with both the first rotor shaft 42 and the second rotor shaft 52. For example, the bidirectional thrust bearing 6 and the first rotor shaft 42 and the second rotor shaft 52 may be transition fit or interference fit. As some embodiments of the present application, Figure 5 As shown, along the axial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 In the X direction shown in FIG, one end of the bidirectional thrust bearing 6 is assembled with the first rotor shaft 42 by interference fit, and the other end of the bidirectional thrust bearing 6 is assembled with the second rotor shaft 52 by interference fit.

[0053] By matching the bidirectional thrust bearing 6 with both the first rotor shaft 42 and the second rotor shaft 52, the bidirectional thrust bearing 6 can withstand bidirectional axial loads by utilizing its good rigidity, making it easier for the first rotor shaft 42 and the second rotor shaft 52 to rotate independently, and limiting the axial displacement of the first rotor shaft 42 and the second rotor shaft 52, thereby facilitating assembly. In addition, one bearing can be matched with both rotor shafts at the same time, thereby reducing the number of parts.

[0054] In some embodiments of the present invention, Figure 5 As shown, along the radial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 In the Y direction shown in FIG, the inner wall of the first groove structure 111 is configured as the outer wall of the second groove structure 121.

[0055] Among them, along the radial direction of the dual-rotor motor 100 (ie Figure 1 、 Figure 5 In the Y direction shown in the figure), the first slot structure 111 is sleeved on the outside of the second slot structure 121, and the inner wall of the first slot structure 111 is configured as the outer wall of the second slot structure 121. As some embodiments of the present application, the first sub-section 11 and the second sub-section 12 are integrally formed, and along the axial direction of the dual-rotor motor 100 (i.e. Figure 1 、 Figure 5 In the X direction shown in the figure), the cross-sections of the first sub-section 11 and the second sub-section 12 can be constructed as a "J"-shaped cross-section, and the lower end of the first sub-section 11 can serve as the upper end of the second sub-section 12.

[0056] Such an arrangement can make the structure of the stator 1 reasonable, and is conducive to reducing the radial direction of the stator 1 along the dual-rotor motor 100 (i.e. Figure 1 、 Figure 5 The size of the dual-rotor motor 100 is beneficial to reducing the production cost of the dual-rotor motor 100, and the first sub-section 11 and the second sub-section 12 are shared, which is beneficial to improving the performance of the dual-rotor motor 100.

[0057] In some embodiments of the present invention, the first rotor 4 is used for driving, and the second rotor 5 is used for generating electricity.

[0058] Among them, the first rotor 4 and the second rotor 5 of the dual-rotor motor 100 of the present application can be controlled independently, and the first rotor 4 is used for driving, and the second rotor 5 is used for power generation. It can be understood that the diameter of the first rotor body 41 is larger than the diameter of the second rotor body 51, that is, the power torque of the first rotor 4 is larger. By using the first rotor 4 for driving, the performance requirements can be met, and the power generation power torque requirement is lower than that for driving. By using the second rotor 5 for power generation, the power generation requirements can be met.

[0059] Furthermore, it should be emphasized that, by using the first rotor 4 for driving and the second rotor 5 for power generation, the present application can simultaneously meet the power generation and driving requirements through a dual-rotor motor 100. Compared with the solution in the prior art that uses two motors to meet the power generation and driving requirements respectively, the cost is greatly reduced and the space utilization is better. In particular, compared with the prior art, the present application can greatly reduce the axial size.

[0060] The dual-rotor motor 100 proposed in this application can be used as a range-extended motor.

[0061] In some embodiments of the present invention, Figure 2-Figure 4 As shown, the stator 1 has a plurality of first stator teeth 15 and a plurality of second stator teeth 16. The plurality of first stator teeth 15 are all located in the first slot structure 111, and the plurality of first stator teeth 15 are arranged around and spaced apart in sequence. The plurality of second stator teeth 16 are all located in the second slot structure 121, and the plurality of second stator teeth 16 are arranged around and spaced apart in sequence.

[0062] Among them, there are multiple first stator teeth 15, and multiple first stator teeth 15 are all located in the first slot structure 111. Multiple first stator teeth 15 are arranged around and spaced in sequence. Specifically, multiple first stator teeth 15 are arranged around the outside of the second sub-section 12 and are evenly spaced in sequence. There are multiple second stator teeth 16, and multiple second stator teeth 16 are all located in the second slot structure 121. Multiple second stator teeth 16 are arranged around and spaced in sequence. Specifically, multiple second stator teeth 16 are arranged around the outside of the matching hole 14 and are evenly spaced in sequence. As some embodiments of the present application, along the radial direction of the dual-rotor motor 100 (i.e. Figure 1 、 Figure 5 In the Y direction shown in FIG, the first stator teeth 15 are sleeved on the outside of the second stator teeth 16 , and the number of the first stator teeth 15 is greater than the number of the second stator teeth 16 .

[0063] As some embodiments of the present application, the plurality of first stator teeth 15 are assembled in cooperation with the first winding 2 , and the plurality of second stator teeth 16 are assembled in cooperation with the second winding 3 .

[0064] Such an arrangement can make the first winding 2 and the second winding 3 wound on the first stator tooth 15 and the second stator tooth 16 respectively, so that the first winding 2 and the second winding 3 are independent of each other, and then the first rotor 4 and the second rotor 5 can be independently controlled, thereby improving the control freedom of the dual-rotor motor 100. Moreover, such an arrangement can improve the working performance of the stator 1, which is beneficial to improving the reliability of the dual-rotor motor 100.

[0065] As some embodiments of this application, Figure 1 and Figure 5 As shown, the dual-rotor motor 100 further includes: a shell body 7 and a cover body 8. The shell body 7 defines a receiving space 82 with one end open. The cover body 8 is detachably mounted on the shell (for example, but not limited to, snap-fitting, screwing, etc.) and covers the open end of the receiving space 82. The stator 1, the first winding 2, the second winding 3, the first rotor 4, the second rotor 5, and the bidirectional thrust bearing 6 can all be accommodated in the receiving space 82, and parts of the first rotor shaft 42 and the second rotor shaft 52 can extend out of the receiving space 82. Figure 1As shown, the housing 7 has a first receiving hole 71 corresponding to the first rotor shaft 42, and the cover 8 has a second receiving hole 81 corresponding to the second rotor shaft 52. The first rotor shaft 42 is inserted into the first receiving hole 71, and the second rotor shaft 52 is inserted into the second receiving hole 81. This arrangement allows the dual-rotor motor 100 to be assembled into a single unit using the housing 7 and cover 8, while also protecting the components within the receiving space 82.

[0066] As some embodiments of this application, Figure 1 and Figure 5 As shown, the dual-rotor motor 100 further includes: tapered roller bearings 9. There are two tapered roller bearings 9, which are respectively placed in the first receiving hole 71 and the second receiving hole 81. One tapered roller bearing 9 is located between the first rotor shaft 42 and the cover 8, and the other tapered roller bearing 9 is located between the second rotor shaft 52 and the housing body 7.

[0067] A vehicle according to an embodiment of the present invention includes a dual-rotor motor 100 based on an axial flux motor according to the above-described embodiment, and the dual-rotor motor 100 is used to generate electricity and / or drive the vehicle. By defining a first slot structure 111 for accommodating a first winding 2 and a second slot structure 121 for accommodating a second winding 3 on a stator 1, the first winding 2 and the second winding 3 are made independent of each other, thereby enabling independent control of the first rotor 4 and the second rotor 5, thereby increasing the control freedom of the dual-rotor motor 100 and meeting the dynamic response requirements of complex operating conditions. Furthermore, by sleeve-fitting the first slot structure 111 onto the outside of the second slot structure 121 and arranging the first rotor 4 and the second rotor 5 coaxially, the axial length of the dual-rotor motor 100 is shortened, significantly improving the compactness of the dual-rotor motor 100.

[0068] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0069] In the description of the present invention, "first feature" or "second feature" may include one or more of the features.

[0070] In the description of the present invention, "plurality" means two or more.

[0071] In the description of the present invention, a first feature being “on” or “under” a second feature may include the first and second features being in direct contact with each other, or the first and second features not being in direct contact with each other but being in contact with each other via another feature therebetween.

[0072] In the description of the present invention, “on”, “above” and “above” a first feature of a second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0073] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0074] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A dual-rotor motor based on an axial flux motor, characterized in that: include: A stator, a first winding, and a second winding, wherein the stator defines a first slot structure and a second slot structure. Along the axial direction of the dual-rotor motor, the first slot structure and the second slot structure are open to both sides respectively, and along the radial direction of the dual-rotor motor, the first slot structure is sleeved outside the second slot structure. The first slot structure is used to accommodate the first winding, and the second slot structure is used to accommodate the second winding. A first rotor and a second rotor are coaxially arranged.

2. The dual-rotor motor based on the axial flux motor according to claim 1, characterized in that: The first rotor includes: a first rotor body and a first rotor shaft, the first rotor body is transmission-connected to the first rotor shaft, the second rotor includes: a second rotor body and a second rotor shaft, the second rotor body is transmission-connected to the second rotor shaft, along the axial direction of the dual-rotor motor, the first rotor body is located on the side where the first slot structure is open, and the second rotor body is located on the side where the second slot structure is open.

3. The dual-rotor motor based on the axial flux motor according to claim 2, characterized in that: The diameter of the first rotor body is greater than the diameter of the second rotor body, and along the axial direction of the dual-rotor motor, the orthographic projection of the first rotor body and the orthographic projection of the first slot structure have an overlapping area, and the orthographic projection of the second rotor body and the orthographic projection of the second slot structure have an overlapping area.

4. The dual-rotor motor based on the axial flux motor according to claim 2, characterized in that: The stator includes a first sub-section and a second sub-section, the first sub-section is sleeved on the outside of the second sub-section and connected to the second sub-section, the first sub-section defines the first slot structure, and the second sub-section defines the second slot structure. Along the axial direction of the dual-rotor motor, the thickness of the second sub-section is less than the thickness of the first sub-section. The first sub-section and the second sub-section jointly define a placement space, and at least a portion of the second rotor body is accommodated in the placement space.

5. The dual-rotor motor based on the axial flux motor according to claim 4, characterized in that: Along the axial direction of the dual-rotor motor, the first sub-section and the second sub-section are flush with one side of the first rotor body, the side of the first sub-section facing away from the first rotor body is flush with the side of the second rotor body facing away from the second sub-section, and the stator is constructed as an integrally formed part.

6. The dual-rotor motor based on the axial flux motor according to claim 2, characterized in that: The stator defines a matching hole, and the first rotor shaft and the second rotor shaft are both inserted into the matching hole.

7. The dual-rotor motor based on the axial flux motor according to claim 6, characterized in that: Also includes: A bidirectional thrust bearing is provided in the matching hole and matches with both the first rotor shaft and the second rotor shaft.

8. The dual-rotor motor based on the axial flux motor according to claim 1, characterized in that: Along the radial direction of the dual-rotor motor, the inner wall of the first slot structure is configured as the outer wall of the second slot structure.

9. The dual-rotor motor based on the axial flux motor according to claim 3, characterized in that: The first rotor is used for driving, and the second rotor is used for generating electricity.

10. A vehicle, characterized in that: The invention comprises a dual-rotor motor based on an axial flux motor according to any one of claims 1 to 9, wherein the dual-rotor motor is used for generating electricity and / or driving the vehicle.

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