Inner and outer double-rotor motor

Abstract

The utility model discloses an inner and outer double-rotor motor, a front support plate and a rear support plate are fixedly arranged on a bottom plate, a stator, an outer rotor, an inner rotor, an outer motor shaft and an inner motor shaft are arranged between the front support plate and the rear support plate, and a front fixing piece and a rear fixing piece are fixedly arranged at the front end and the rear end of a stator iron core. Strip-shaped holes corresponding to the outer stator through grooves and the inner stator through grooves are formed in the front fixing piece and the rear fixing piece, the number of the outer stator through grooves and the number of the inner stator through grooves are the same, the number of the outer stator through grooves is N, the outer stator through grooves and the inner stator through grooves are divided into three categories, and the positions and the numbers of the outer stator through grooves and the inner stator through grooves are in one-to-one correspondence; the number of the outer stator through slots of the first outer ring slot is a ratio of N to 3; the input ends and the output ends of the windings of the outer stator through slots and the inner stator through slots in the first outer ring slot and the first inner ring slot are mutually connected to form parallel connection; the motor is provided with the two motor shafts rotating at different rotating speeds, so that the winding difficulty of the winding is effectively reduced, the waste of end copper wires is reduced, and the use effect is improved.

Description

Technical Field

[0001] The utility model relates to a novel motor structure, in particular to an inner and outer double-rotor motor. Background Art

[0002] The common principle of three-phase asynchronous motors is to convert electrical energy into magnetic energy, and finally the interaction of magnetic poles converts it into mechanical energy output. It is difficult for one type of motor to take into account the advantages of two different types of motors, so that under certain specific working conditions, one type of motor is difficult to meet all working conditions. For example, common motors are all external stator and internal rotor structures or internal stator and external rotor structures, with only one rotating part, and it is difficult to simultaneously meet the requirements that the inner and outer rotors can rotate at different speeds, and the motor is required to have a smaller size structure.

[0003] Patent No. 202311097563.2 discloses a dual-rotor motor and a working method thereof, in which the stator is located between the outer rotor and the inner rotor in the dual-rotor motor, and the stator is supported by a stator magnetic isolation bracket. In order to drive the outer rotor and the inner rotor respectively, the stator core is divided into two relatively independent magnetic circuits by the stator magnetic isolation bracket. This results in the stator being divided into a stator outer winding and a stator inner winding when the coil is wound. Both the stator outer winding and the stator inner winding require coils to be arranged across slots, which makes winding more complicated and increases the difficulty. There are more copper wires exposed at the ends, resulting in excessive use of copper wire. Utility Model Content

[0004] The technical problem to be solved by the utility model is: an inner and outer double-rotor motor, which has two motor shafts rotating at different speeds, effectively reduces the difficulty of winding, reduces the waste of end copper wires, and improves the use effect.

[0005] In order to solve the above technical problems, the technical solution of the utility model is: an inner and outer double rotor motor, comprising a bottom plate, a front support plate and a rear support plate are fixedly installed on the bottom plate, a stator, an outer rotor, an inner rotor, an outer motor shaft and an inner motor shaft are installed between the front support plate and the rear support plate, the stator is installed between the outer rotor and the inner rotor, a first air gap is formed between the outer rotor and the stator, a second air gap is formed between the inner rotor and the stator, the inner rotor is a squirrel cage structure, the inner rotor is rotatably installed in the inner cavity of the stator, the inner motor shaft is fixedly installed in the inner rotor, the inner motor shaft passes through the front support plate, and a permanent magnet is fixedly installed on the outer rotor. The outer rotor is rotatably mounted on the outside of the stator, the outer motor shaft is fixedly mounted on one side of the outer rotor, the outer motor shaft passes through the rear support plate and is rotatably mounted on the rear support plate through a bearing, the outer motor shaft and the inner motor shaft are coaxial, the stator comprises a stator core, the stator core is stacked by a plurality of silicon steel sheets, the silicon steel sheets are punched with outer through holes and inner through holes, the outer through holes and the inner through holes are stacked through the silicon steel sheets to form outer stator slots and inner stator slots, the outer stator slots and the inner stator slots are rotatably wound with windings, and the input end and the output end of the windings are both extended from one side, the front and rear ends of the stator core are fixedly mounted with front fixing parts and rear The fixing member, the front fixing member and the rear fixing member are both provided with strip holes corresponding to the outer stator through slots and the inner stator through slots, the front fixing member and the rear fixing member are both installed with bearings, the inner motor shaft is rotatably installed in the front fixing member and the rear fixing member through the bearings, the front fixing member and the rear fixing member are also fixed with bearings outside, the outer rotor is rotatably installed on the front fixing member and the rear fixing member through the bearings, the front fixing member is fixedly installed on the front supporting plate, the outer stator through slots and the inner stator through slots are the same in number, both are N, the outer stator through slots and the inner stator through slots are divided into the following three categories and correspond one to one: the first outer ring slots and the first inner ring slots corresponding to each other, ... The corresponding second outer ring slots and second inner ring slots, and the corresponding third outer ring slots and third inner ring slots: the number of outer stator slots of the first outer ring slot is the ratio of N to three, the input ends and output ends of the windings of the outer stator slots and inner stator slots in the first outer ring slots and the first inner ring slots are respectively connected in parallel to form a first phase winding, the input ends and output ends of the windings of the outer stator slots and inner stator slots in the second outer ring slots and the second inner ring slots are respectively connected in parallel to form a second phase winding, and the input ends and output ends of the windings of the outer stator slots and inner stator slots in the third outer ring slots and the third inner ring slots are respectively connected in parallel to form a third phase winding.

[0006] As a preferred solution, the inner rotor includes an inner rotor core, the inner motor shaft is fixedly installed on the inner rotor core, a metal guide bar is inserted and installed in the inner rotor core, both ends of the inner rotor core are provided with inner end rings matching with the metal guide bar, one end of the metal guide bar is fixedly connected to the inner end ring, and the other end of the metal guide bar is welded and fixed to the inner end ring.

[0007] As a preferred solution, a positioning end face is provided at one end of the inner motor shaft, and an elastic retaining ring is provided at the other end of the inner motor shaft, and the elastic retaining ring is close to the end face of the inner rotor core.

[0008] As a preferred solution, the outer rotor includes an outer shell, an outer rotor core is fixedly installed in the outer shell, a plurality of permanent magnets are evenly distributed on the inner circumference of the outer rotor core, a front end cover and a rear end cover are fixedly installed at the front and rear ends of the outer rotor, the front end cover cooperates with a bearing outside the front fixing part and is rotatably installed on the front fixing part, the rear end cover cooperates with a bearing outside the rear fixing part and is rotatably installed on the rear fixing part, and the outer motor shaft is fixedly installed on the rear end cover.

[0009] As a preferred solution, a front stop cover for limiting the bearing is provided at the end of the front fixing member, and a rear stop cover for limiting the bearing is provided at the end of the rear fixing member.

[0010] After adopting the above technical scheme, the effect of the utility model is: an inner and outer double rotor motor, comprising a bottom plate, a front support plate and a rear support plate are fixedly installed on the bottom plate, a stator, an outer rotor, an inner rotor, an outer motor shaft and an inner motor shaft are installed between the front support plate and the rear support plate, the stator is installed between the outer rotor and the inner rotor, a first air gap is formed between the outer rotor and the stator, and a second air gap is formed between the inner rotor and the stator, characterized in that: the inner rotor is a squirrel cage structure, the inner rotor is rotatably installed in the stator cavity, the inner motor shaft is fixedly installed in the inner rotor, the inner motor shaft passes through the front support plate, and the outer rotor is fixed on the outer rotor. A permanent magnet is installed, the outer rotor is rotatably installed on the outside of the stator, the outer motor shaft is fixedly installed on one side of the outer rotor, the outer motor shaft passes through the rear support plate and is rotatably installed on the rear support plate through a bearing, the outer motor shaft and the inner motor shaft are coaxial, the stator includes a stator core, the stator core is stacked by a plurality of silicon steel sheets, the silicon steel sheets are punched with outer through holes and inner through holes, the outer through holes and the inner through holes are stacked through the silicon steel sheets to form outer stator slots and inner stator slots, the outer stator slots and the inner stator slots are rotatably wound with windings, and the input end and the output end of the winding both extend from one side, and the front and rear ends of the stator core are fixedly installed with front fixed The front fixing part and the rear fixing part are both provided with strip holes corresponding to the outer stator through slots and the inner stator through slots, the front fixing part and the rear fixing part are both installed with bearings, the inner motor shaft is rotatably installed in the front fixing part and the rear fixing part through bearings, the front fixing part and the rear fixing part are also fixed with bearings outside, the outer rotor is rotatably installed on the front fixing part and the rear fixing part through bearings, the front fixing part is fixedly installed on the front supporting plate, the outer stator through slots and the inner stator through slots are the same in number, both are N, the outer stator through slots and the inner stator through slots are divided into the following three categories and correspond one to one; the first outer ring slots and the first inner ring slots corresponding to each other, The second outer ring slots and the second inner ring slots correspond to each other, and the third outer ring slots and the third inner ring slots correspond to each other: the number of outer stator through slots of the first outer ring slot is the ratio of N to three, the input ends and output ends of the windings of the outer stator through slots and the inner stator through slots in the first outer ring slot and the first inner ring slot are respectively connected in parallel to form a first phase winding, the input ends and output ends of the windings of the outer stator through slots and the inner stator through slots in the second outer ring slot and the second inner ring slot are respectively connected in parallel to form a second phase winding, and the input ends and output ends of the windings of the outer stator through slots and the inner stator through slots in the third outer ring slot and the third inner ring slot are respectively connected in parallel to form a third phase winding.When winding the outer stator slots and inner stator slots of the stator core, the winding enters from one side of the outer stator slot, then extends from the outer stator slot on the other side, enters from the inner stator slot on the same side, and then extends from the inner stator slot at one end. This cycle is repeated for multiple times, and finally extends from the inner stator slot at one end. The entry end and the output end of the winding are both located on the same side. The other corresponding outer stator slots and inner stator slots are wound as described above, and then divided into three categories for a parallel connection method with four parallel paths. The first outer ring slot and The windings in the first inner ring slot respectively connect the input end with the input end and the output end with the output end to form a parallel connection. The second outer ring slot and the second inner ring slot, the third outer ring slot and the third inner ring slot are connected in parallel as described above. The coils are directly arranged in the corresponding outer stator through slots and inner stator through slots, so the ends do not need to be left too long. Since there is no cross-slot, the shaping is simple, and the coils can easily pass through the bar holes in the front fixing part and the rear fixing part. Since each phase winding can adopt a parallel connection method with four parallel paths, each coil is relatively independent.

[0011] Furthermore, since the inner rotor includes an inner rotor core, the inner motor shaft is fixedly installed in the inner rotor core, a metal guide bar is inserted and installed in the inner rotor core, inner end rings matching the metal guide bar are provided at both ends of the inner rotor core, one end of the metal guide bar is fixedly connected to the inner end ring, and the other end of the metal guide bar is welded and fixed to the inner end ring; since one end of the metal guide bar is fixed to the inner end ring, when the metal guide bar is installed in the inner rotor core, all the metal guide bars are inserted into the inner rotor core, and then when the end face of the inner end ring is fitted with the end face of the inner rotor core, it is ensured that the metal guide bar is quickly installed in place, and then the inner end ring on the other side is sleeved on the metal guide bar and welded and fixed, thereby improving the installation and positioning efficiency.

[0012] Furthermore, since a positioning end face is provided at one end of the inner motor shaft and an elastic retaining ring is provided at the other end of the inner motor shaft, and the elastic retaining ring is close to the end face of the inner rotor core, the installation position can be quickly and accurately located when the inner motor shaft is installed, and the elastic retaining ring can ensure that no axial movement occurs after installation.

[0013] Furthermore, since the outer rotor includes an outer shell, an outer rotor core is fixedly installed in the outer shell, a plurality of permanent magnets are evenly distributed on the inner circumference of the outer rotor core, a front end cover and a rear end cover are fixedly installed at the front and rear ends of the outer rotor, the front end cover cooperates with a bearing outside the front fixing member to be rotatably installed on the front fixing member, the rear end cover cooperates with a bearing outside the rear fixing member to be rotatably installed on the rear fixing member, and the outer motor shaft is fixedly installed on the rear end cover; it is ensured that the outer rotor is effectively supported when rotating, and the outer rotor and the inner rotor are separated by the bearings and do not affect each other's rotation.

[0014] Furthermore, since the end of the front fixing member is provided with a front stop cover for limiting the bearing, and the end of the rear fixing member is provided with a rear stop cover for limiting the bearing, the position of the bearing supporting the rotating inner motor shaft can be limited to ensure stable rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0016] Figure 1 It is a stereogram of an embodiment of the utility model;

[0017] Figure 2 It is a half-section view of an embodiment of the utility model;

[0018] Figure 3 It is a schematic diagram of the structure of the stator of the embodiment of the utility model;

[0019] Figure 4 is a half-section view of the inner rotor of an embodiment of the utility model;

[0020] Figure 5 is a half-section view of the outer rotor of an embodiment of the utility model;

[0021] Figure 6 is a cross-sectional view of a stator core of an embodiment of the utility model;

[0022] In the accompanying drawings: 1, bottom plate; 2, front support plate; 3, rear support plate; 4, outer motor shaft; 5, inner motor shaft; 6, first air gap; 7, second air gap; 8, stator core; 9, outer stator through slot; 10, inner stator through slot; 11, front fixing piece; 12, rear fixing piece; 13, strip hole; 14, bearing; 15, inner rotor core; 16, metal guide bar; 17, inner end ring; 18, positioning end face; 19, elastic retaining ring; 20, outer shell; 21, outer rotor core; 22, permanent magnet; 23, front end cover; 24, rear end cover; 25, installation end face; 26, front cover; 27, rear cover; 28, first outer ring groove; 29, first inner ring groove; 30, second outer ring groove; 31, second inner ring groove; 32, third outer ring groove; 33, third inner ring groove. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below through specific embodiments.

[0024] like Figures 1 to 6As shown, an inner and outer double rotor motor comprises a base plate 1, a front support plate 2 and a rear support plate 3 are fixedly mounted on the base plate 1, a stator, an outer rotor, an inner rotor, an outer motor shaft 4 and an inner motor shaft 5 are mounted between the front support plate 2 and the rear support plate 3, the stator is mounted between the outer rotor and the inner rotor, a first air gap 6 is formed between the outer rotor and the stator, a second air gap 7 is formed between the inner rotor and the stator, the inner rotor is a squirrel cage structure, the inner rotor is rotatably mounted in the inner cavity of the stator, the inner motor shaft 5 is fixedly mounted in the inner rotor, the inner motor shaft 5 passes through the front support plate 2, and the outer rotor is fixedly mounted on the outer rotor. The stator is provided with a permanent magnet 22, the outer rotor is rotatably mounted on the outside of the stator, the outer motor shaft 4 is fixedly mounted on one side of the outer rotor, the outer motor shaft 4 penetrates the rear support plate 3 and is rotatably mounted on the rear support plate 3 through a bearing 14, the outer motor shaft 4 and the inner motor shaft 5 are coaxial, the stator comprises a stator core 8, the stator core 8 is formed by stacking a plurality of silicon steel sheets, the silicon steel sheets are punched with outer through holes and inner through holes, the outer through holes and the inner through holes are stacked through the silicon steel sheets to form outer stator slots 9 and inner stator slots 10, the outer stator slots 9 and the inner stator slots 10 are rotatably wound with windings and the input of the windings The output end and the output end both extend from one side, the front and rear ends of the stator core 8 are fixedly installed with a front fixing part 11 and a rear fixing part 12, and the front and rear fixing parts 11 and the rear fixing parts 12 are each provided with a strip hole 13 corresponding to the outer stator through slot 9 and the inner stator through slot 10, and the front fixing parts 11 and the rear fixing parts 12 are each installed with a bearing 14, and the inner motor shaft 5 is rotatably installed in the front fixing parts 11 and the rear fixing parts 12 through the bearing 14, and the outer side of the front fixing parts 11 and the rear fixing parts 12 is also fixed with a bearing 14, and the outer rotor is rotatably installed on the front fixing parts 11 and the rear fixing parts 12 through the bearing 14, and the front fixing parts The stator 11 is fixedly mounted on the front support plate 2, and the outer stator through slots 9 and the inner stator through slots 10 are the same in number, both being N. The outer stator through slots 9 and the inner stator through slots 10 are divided into three categories and their positions and numbers correspond one to one: a first outer ring slot 28 and a first inner ring slot 29, a second outer ring slot 30 and a second inner ring slot 31, a third outer ring slot 32 and a third inner ring slot 33, and the number of the outer stator through slots 9 of the first outer ring slot 28 is a ratio of N to three, and the input ends and output ends of the windings of the outer stator through slots 9 and the inner stator through slots 10 in the first outer ring slot 28 and the first inner ring slot 29 are respectively connected to each other to form a parallel connection.

[0025] like Figure 4As shown, the inner rotor includes an inner rotor core 15, the inner motor shaft 5 is fixedly mounted on the inner rotor core 15, a metal guide bar 16 is inserted and mounted in the inner rotor core 15, and inner end rings 17 cooperating with the metal guide bar 16 are provided at both ends of the inner rotor core 15, one end of the metal guide bar 16 is fixedly connected to the inner end ring 17, and the other end of the metal guide bar 16 is welded and fixed to the inner end ring 17; a plurality of metal guide bars 16 are mounted on the circumference of the inner rotor core 15, and the plurality of metal guide bars 16 are fixed to one of the inner end rings 17, and the inner end ring 17 plays a positioning role, so that it can be ensured that after the metal guide bar 16 is inserted into the inner rotor core 15, the end face of the inner end ring 17 contacts with the end face of the inner rotor core 15, and the positioning is fast and accurate, and then another inner end ring 17 is put on the metal guide bar 16 and welded and fixed, so as to improve the installation and positioning efficiency;.

[0026] Furthermore, a positioning end face 18 is provided at one end of the inner motor shaft 5, and an elastic retaining ring 19 is provided at the other end of the inner motor shaft 5, and the elastic retaining ring 19 is close to the end face of the inner rotor core 15; when installing the inner motor shaft 5, the installation position can be quickly and accurately located, and the elastic retaining ring 19 can ensure that no axial movement will occur after installation, thereby ensuring stable rotation.

[0027] like Figure 2 and Figure 5 As shown, the outer rotor includes a shell 20, an outer rotor core 21 is fixedly installed in the shell 20, and a plurality of permanent magnets 22 are evenly distributed on the inner circumference of the outer rotor core 21. A front end cover 23 and a rear end cover 24 are fixedly installed at the front and rear ends of the outer rotor. The front end cover 23 cooperates with the bearing 14 outside the front fixing member 11 to be rotatably installed on the front fixing member 11, and the rear end cover 24 cooperates with the bearing 14 outside the rear fixing member 12 to be rotatably installed on the rear fixing member 12. The outer motor shaft 4 is fixedly installed on the rear end cover 24; the front and rear end covers 24 are fixedly installed on the shell 20 by screw connection. After the front and rear ends of the core 21 are fixedly installed with a front cover 23 and a rear cover 24, the internal structure of the outer rotor core 21 can be effectively protected during rotation, and the front cover 23 cooperates with the bearing 14 fixed on the outside of the front fixing member 11, and the rear cover 24 cooperates with the bearing 14 fixed on the outside of the rear fixing member 12, ensuring that the outer rotor and the inner rotor are not affected by each other during rotation, and a mounting end face 25 is also provided on the outer motor shaft 4, and the mounting end face 25 is fixedly installed on the rear cover 24 by screw connection, so that the outer motor shaft 4 is firmly installed, and the mounting end face 25 can also effectively resist the bearing 14 on the outside of the rear fixing member 12.

[0028] In this embodiment, the front support plate 2 and the rear support plate 3 are respectively fixedly mounted on the front and rear ends of the base plate 1 by screws, the outer motor shaft 4 is rotatably mounted on the rear support plate 3 through the bearing 14 on the rear support plate 3, and the front fixing member 11 is fixedly mounted on the front support plate 2 by screw connection, ensuring that the stator core 8 does not rotate. The front fixing member 11 and the rear fixing member 12 are both a disc with a cylindrical protrusion vertically mounted on it and a circular through hole is provided in the middle of the cylindrical protrusion. The strip holes 13 are circumferentially distributed on the disc and correspond to the outer stator through slots 9 and the inner stator through slots 10, and the front fixing member 11 is fixedly mounted on the front support plate 2 by screw connection, ensuring that the stator core 8 does not rotate. The stator core 8 is fixed with the rear fixing member 11 and the rear fixing member 12 by bolts and nuts at the front and rear ends of the stator core 8. The stator core 8 is provided with twenty-four outer stator slots 9 and twenty-four inner stator slots 10, respectively. Therefore, the number of the outer stator slots 9 and the inner stator slots 10 of the first outer ring slot 28 and the first inner ring slot 29 is eight, and the number of the outer stator slots 9 and the inner stator slots 10 of the second outer ring slot 30 and the second inner ring slot 31, the third outer ring slot 32 and the third inner ring slot 33 is also eight. Due to the parallel connection method with four parallel paths, every two outer stator slots 9 and every two inner stator slots 1 0 is a group of circumferentially distributed on the stator core 8. When two outer stator slots 9 and two inner stator slots 10 are connected in parallel, four outer stator slots 9 and inner stator slots 10 are separated and connected in parallel with the next two outer stator slots 9 and inner stator slots 10. The coil is directly arranged in the corresponding outer stator slots 9 and inner stator slots 10, so the end does not need to be too long. Since there is no cross-slot, the shaping is simple, and the coil can easily pass through the bar holes 13 in the front fixing piece 11 and the rear fixing piece 12. Since each phase winding can adopt a parallel connection method with four parallel paths, each coil is relatively independent. The current and phase sequence u, v, w of the winding in the stator core 8 are three-phase positive, u', v', w' are three-phase negative, the direction and phase sequence of the three-phase current in the outer stator slot 9 are the same as the winding current and phase sequence of the common four-pole outer rotor brushless permanent magnet motor, and the direction and phase sequence of the three-phase current in the inner stator slot 10 are the same as the current direction and phase sequence of the common four-pole three-phase AC motor, and because the currents in the corresponding slots of the inner stator slot 10 and the outer stator slot 9 are in the same phase and in opposite directions, the magnetic flux lines formed by them are in the same direction when passing through the silicon steel components between the two slots of the stator core 8.

[0029] Furthermore, a front baffle 26 for limiting the bearing 14 is provided at the end of the front fixing member 11, and a rear baffle 27 for limiting the bearing 14 is provided at the end of the rear fixing member 12; the front baffle 26 and the rear baffle 27 are fixedly installed on the corresponding front fixing member 11 and the rear fixing member 12 by screw connection, and the end face of the front baffle 26 can press against the bearing 14 in the front fixing member 11 and cooperate with the inner motor shaft 5 at one end to limit the position, and the end face of the rear baffle 27 can press against the bearing 14 in the rear fixing member 12 and cooperate with the inner motor shaft 5 at the other end to limit the position, so that the inner motor shaft 5 can be axially limited during rotation, thereby ensuring the stability of rotation.

[0030] The above-described embodiments are merely descriptions of preferred implementations of the present invention and are not intended to limit the scope of the present invention. Various modifications and alterations to the technical solution of the present invention, without departing from the design spirit of the present invention, should fall within the scope of protection defined in the claims of the present invention.

Claims

1. An inner and outer double rotor motor, comprising a bottom plate, a front support plate and a rear support plate are fixedly mounted on the bottom plate, a stator, an outer rotor, an inner rotor, an outer motor shaft and an inner motor shaft are mounted between the front support plate and the rear support plate, the stator is mounted between the outer rotor and the inner rotor, a first air gap is formed between the outer rotor and the stator, and a second air gap is formed between the inner rotor and the stator, characterized in that: The inner rotor is a squirrel cage structure, the inner rotor is rotatably mounted in the inner cavity of the stator, the inner motor shaft is fixedly mounted in the inner rotor, the inner motor shaft passes through the front support plate, a permanent magnet is fixedly mounted on the outer rotor, the outer rotor is rotatably mounted on the outside of the stator, the outer motor shaft is fixedly mounted on one side of the outer rotor, the outer motor shaft passes through the rear support plate and is rotatably mounted on the rear support plate through a bearing, and the outer motor shaft and the inner motor shaft are coaxial; The stator includes a stator core, which is formed by stacking a number of silicon steel sheets. The silicon steel sheets are punched with external through holes and internal through holes. The external through holes and the internal through holes are stacked through the silicon steel sheets to form external stator slots and internal stator slots. Windings are rotatably wound in the external stator slots and the internal stator slots, and the input end and the output end of the winding both extend from one side. The front and rear ends of the stator core are fixedly installed with a front fixing member and a rear fixing member. The front fixing member and the rear fixing member are both provided with strip holes corresponding to the external stator slot and the internal stator slot. Inner bearings are installed in the front fixing member and the rear fixing member. The inner motor shaft is rotatably installed in the front fixing member and the rear fixing member through the inner bearing. External bearings are also fixed to the outside of the front fixing member and the rear fixing member. The outer rotor is rotatably installed on the front fixing member and the rear fixing member through the external bearing. The front fixing member is fixedly installed on the front support plate In the embodiment, the number of the outer stator through slots and the inner stator through slots is the same and both are N, and the outer stator through slots and the inner stator through slots are divided into the following three categories and correspond one to one; a first outer ring slot and a first inner ring slot corresponding to each other, a second outer ring slot and a second inner ring slot corresponding to each other, and a third outer ring slot and a third inner ring slot corresponding to each other: the number of the outer stator through slots of the first outer ring slot is a ratio of N to three, the input ends and the output ends of the windings of the outer stator through slots and the inner stator through slots in the first outer ring slot and the first inner ring slot are respectively connected in parallel to form a first phase winding, the input ends and the output ends of the windings of the outer stator through slots and the inner stator through slots in the second outer ring slot and the second inner ring slot are respectively connected in parallel to form a second phase winding, and the input ends and the output ends of the windings of the outer stator through slots and the inner stator through slots in the third outer ring slot and the third inner ring slot are respectively connected in parallel to form a third phase winding.

2. An inner and outer dual rotor motor as claimed in claim 1, characterized in that: The inner rotor includes an inner rotor core, the inner motor shaft is fixedly installed in the inner rotor core, a metal guide bar is inserted and installed in the inner rotor core, inner end rings matching with the metal guide bar are provided at both ends of the inner rotor core, one end of the metal guide bar is fixedly connected to the inner end ring, and the other end of the metal guide bar is welded and fixed to the inner end ring.

3. An inner and outer dual rotor motor as claimed in claim 2, characterized in that: A positioning end surface is provided at one end of the inner motor shaft, and an elastic retaining ring is provided at the other end of the inner motor shaft, and the elastic retaining ring is close to the end surface of the inner rotor core.

4. An inner and outer dual rotor motor as claimed in claim 1, characterized in that: The outer rotor comprises an outer shell, an outer rotor core is fixedly mounted in the outer shell, a plurality of permanent magnets are evenly distributed on the inner circumference of the outer rotor core, a front end cover and a rear end cover are fixedly mounted on the front and rear ends of the outer rotor, the front end cover cooperates with a bearing outside the front fixing part to be rotatably mounted on the front fixing part, the rear end cover cooperates with a bearing outside the rear fixing part to be rotatably mounted on the rear fixing part, and the outer motor shaft is fixedly mounted on the rear end cover.

5. An inner and outer dual rotor motor as claimed in claim 1, characterized in that: A front stop cover for limiting the bearing is disposed at the end of the front fixing member, and a rear stop cover for limiting the bearing is disposed at the end of the rear fixing member.

Images