Double-stator reduction motor

Abstract

The utility model relates to power motor technical field, especially a double stator reduction motor, including shell, output fixed base, double stator drive arrangement, output transmission and output connecting seat, the shell is provided with drive cavity, double stator drive arrangement sets up in drive cavity, output fixed base sets up in one side of drive cavity and will cover drive cavity, output fixed base is provided with transmission cavity, and the drive end of double stator drive arrangement extends to transmission cavity, and output transmission sets up in transmission cavity, and is connected with the drive end of double stator drive arrangement, and output connecting seat sets up in one end of transmission cavity, and is connected with output transmission, double stator drive arrangement is used to drive output transmission to drive output connecting seat to rotate. The utility model has organically combined high torque density, high running stability, high structural integration and good heat dissipation, and provides a kind of power solution scheme of excellent performance, compact structure and reliable.

Description

Technical Field

[0001] This utility model relates to the field of power motor technology, and in particular to a double stator geared motor. Background Technology

[0002] In modern industrial automation, robot joint drives, precision servo systems, and new energy vehicles, increasingly stringent requirements are being placed on the performance of drive motors. On the one hand, the trend towards miniaturization and lightweighting of equipment demands that drive sources possess higher power density and torque density, meaning they must output greater power within a limited installation space. On the other hand, application scenarios often require motors to possess characteristics such as high torque at low speeds, smooth operation, low noise and vibration, and high reliability.

[0003] Traditional single-stator motors typically require either increased size or increased speed to improve torque. The former contradicts the need for miniaturization, while the latter often necessitates the use of a reduction gear mechanism. The common "motor + independent gearbox" combination, while achieving low-speed, high-torque output, suffers from a long transmission chain, a non-compact structure, backlash issues, and inherent drawbacks such as significant energy loss, low efficiency, and high noise and vibration. Furthermore, the split structure increases the system's axial dimensions and overall weight, hindering the application of highly integrated devices.

[0004] As a novel topology, the dual-stator motor, by employing two layers of stator windings acting on a single rotor, theoretically significantly improves magnetic field utilization and air gap magnetic flux density. This allows for torque output far exceeding that of traditional motors within the same volume, making high-power-density drives possible. Therefore, there is an urgent need in this field for an innovative integrated design that deeply integrates the high torque density advantage of the dual-stator motor with the high torque output requirements of the reduction gear transmission mechanism, achieving a high degree of integration between drive and transmission. This would ensure excellent performance while achieving a compact structure, efficient transmission, and smooth operation. Utility Model Content

[0005] To address the aforementioned issues, this invention organically combines high torque density, high operational stability, high structural integration, and excellent heat dissipation, providing a high-performance, compact, and reliable power solution using a dual-stator geared motor.

[0006] The technical solution adopted by this utility model is as follows: a dual-stator geared motor, including a housing, an output mounting base, a dual-stator drive device, an output transmission device, and an output connecting base. The housing is provided with a drive cavity, the dual-stator drive device is disposed within the drive cavity, the output mounting base is disposed on one side of the drive cavity and covers the drive cavity, the output mounting base is provided with a transmission cavity, the drive end of the dual-stator drive device extends into the transmission cavity, the output transmission device is disposed within the transmission cavity and connected to the drive end of the dual-stator drive device, and the output connecting base is disposed at one end of the transmission cavity and connected to the output transmission device. The dual-stator drive device is used to drive the output transmission device to rotate the output connecting base. The dual-stator drive device includes a first stator assembly, a second stator assembly, a rotor support, a rotor assembly, and a fixed main shaft. The first stator assembly is disposed on the inner wall of the drive cavity, the fixed main shaft is disposed at the axis of the drive cavity, the second stator assembly is disposed on the fixed main shaft, the rotor support is used to fix the rotor assembly and is provided with an output shaft, the output shaft is connected to the output transmission device, and the two sides of the rotor assembly are respectively opposite to the first stator assembly and the second stator assembly.

[0007] A further improvement to the above solution is that the outer periphery of the outer shell is provided with multiple heat dissipation grooves, which are used to dissipate heat from the dual stator drive device in the drive cavity; the bottom of the rotor support is provided with fan blades, which generate airflow through the fan blades when the rotor support rotates, and are used to transfer the hot air in the drive cavity out of the heat dissipation grooves.

[0008] A further improvement to the above solution is that a connecting inner ring and a connecting outer ring are provided on one side of the output fixing base. The connecting outer ring is fixedly connected to the outer shell, and the connecting inner ring is provided with a first bearing and is connected to the dual stator drive device through the first bearing.

[0009] A further improvement to the above scheme is that the output fixing seat is provided with a sensing cavity on the lower side of the transmission cavity, a first sensing element is provided in the sensing cavity, and a second sensing element is provided on the rotor support. The first sensing element and the second sensing element cooperate with each other to read the rotation angle of the rotor support.

[0010] A further improvement to the above scheme is that the rotor support includes an upper support and a lower support, the rotor assembly is provided with a rotor fixing frame and multiple rotor magnets, and the rotor magnets are disposed on the rotor fixing frame; the upper support and the lower support are respectively used to fix the two sides of the rotor fixing frame.

[0011] A further improvement to the above scheme is that the upper support is provided with a fixing slot, the lower support is provided with a fixing step, one end of the rotor fixing frame is set in the fixing slot and the other end is set on the fixing step; the rotor fixing frame is provided with multiple rotor slots, and the rotor magnet is inserted into the rotor slot.

[0012] A further improvement to the above scheme is that the upper support is provided with a second bearing, the lower support is provided with a third bearing, the upper support is connected to the fixed spindle through the second bearing, and the lower support is connected to the fixed spindle through the third bearing.

[0013] A further improvement to the above scheme is that the output transmission device includes a sun gear, planetary gears, and a gear ring. The gear ring is fixedly disposed in the transmission cavity. The sun gear is connected to the drive end of the dual stator drive device. The planetary gears are disposed on the output connector and mesh with the sun gear and the gear ring respectively.

[0014] A further improvement to the above solution is that an end cap is provided at the end of the output fixing seat, the end cap is used to cover the transmission cavity, the end cap is provided with a fourth bearing, and the end cap is connected to the output connecting seat through the fourth bearing.

[0015] A further improvement to the above solution is that the output connector is provided with a transmission fixing part, and the output transmission device is mounted on the transmission fixing part.

[0016] The beneficial effects of this utility model are: Compared to existing motors, this invention achieves a multiplication of electromagnetic drive sources within a nearly identical structural space by coaxially arranging a first stator assembly and a second stator assembly within the drive cavity of the housing, allowing them to work together on the same rotor assembly. The "inner and outer sandwich" magnetic circuit design of the dual stators on a single rotor significantly improves the utilization efficiency of the magnetic field and the air gap magnetic flux density, enabling the motor to output greater torque and power while maintaining a compact size. This increases the motor's power density and meets the demands of miniaturization, weight reduction, and high-torque drive. The rotor assembly is supported by a rotor bracket, with its two sides forming effective air gap working surfaces with the inner and outer stators, respectively. The symmetrical magnetic pull structure helps to counteract unilateral magnetic pull, resulting in a more balanced rotor force, effectively reducing vibration and noise during operation and improving the motor's operational stability. Simultaneously, the interaction of the dual stator magnetic fields improves the waveform of the air gap magnetic field, reduces torque pulsation, and makes the output torque smoother and more stable, improving control accuracy at low speeds. The dual-stator drive unit and output transmission unit are sequentially integrated into the drive cavity and transmission cavity, respectively, and the output shaft directly drives the transmission unit, forming a highly integrated power unit. This design eliminates the need for additional couplings or complex connection mechanisms, shortens the transmission chain, reduces space occupation, achieves structural compactness, and effectively reduces energy loss, backlash, and inertia caused by intermediate links, thereby improving transmission efficiency and dynamic response speed. The fixed spindle not only fixes the second stator assembly but also constitutes an important structural support and heat conduction path. Heat can be dissipated bidirectionally from the inner stator through the fixed spindle and from the outer stator through the outer casing, increasing the heat dissipation area, improving the motor's heat dissipation conditions, allowing the motor to operate continuously at higher power, and improving reliability and service life. This invention organically combines high torque density, high operational stability, high structural integration, and good heat dissipation, providing a high-performance, compact, and reliable power solution. Attached Figure Description

[0017] Figure 1 This is a three-dimensional schematic diagram of the dual-stator geared motor of this utility model; Figure 2 for Figure 1 Front view schematic diagram of a medium-duty double-stator geared motor; Figure 3 for Figure 2 Sectional view of AA; Figure 4 for Figure 1 Exploded view of a double-stator geared motor; Figure 5 for Figure 1 An exploded view of a dual-stator geared motor from another perspective.

[0018] Explanation of reference numerals in the attached drawings: 1. Outer shell; 11. Drive cavity; 12. Heat dissipation groove; 2. Output mounting base; 21. Transmission cavity; 22. Connecting inner ring; 23. Connecting outer ring; 24. First bearing; 25. Sensing cavity; 251. First sensing element; 253. Oil baffle; 26. Cover plate; 261. Fourth bearing; 361. Dual stator drive device; 31. First stator assembly; 32. Second stator assembly; 33. Rotor support; 36. Output shaft; 37. Fan blade; 331. Upper support; 3311. Fixed slot; 3312. Second bearing; 332. Lower support; 3321. Fixed step; 3322. Third bearing; 34. Rotor assembly; 341. Rotor mounting bracket; 3411. Rotor slot; 342. Rotor magnet; 35. Fixed spindle; 252. Second sensing element; 4. Output transmission device; 41. Sun gear; 42. Planetary gear; 43. Gear ring; 5. Output connecting base; 51. Transmission fixing part. Detailed Implementation

[0019] To facilitate understanding of this utility model, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of this utility model are shown in the drawings. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this utility model.

[0020] It should be noted that when a component is said to be "fixed to" another component, it can be directly attached to the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Figures 1-5As shown, in one embodiment of this utility model, a dual-stator geared motor is disclosed, comprising a housing 1, an output mounting base 2, a dual-stator drive device 3, an output transmission device 4, and an output connector 5. The housing 1 is provided with a drive cavity 11, the dual-stator drive device 3 is disposed within the drive cavity 11, the output mounting base 2 is disposed on one side of the drive cavity 11 and covers the drive cavity 11, the output mounting base 2 is provided with a transmission cavity 21, the drive end of the dual-stator drive device 3 extends into the transmission cavity 21, the output transmission device 4 is disposed within the transmission cavity 21 and connected to the drive end of the dual-stator drive device 3, and the output connector 5 is disposed at one end of the transmission cavity 21 and connected to the output transmission device 4. The dual-stator drive device 3 is used to drive the output transmission device 4 to rotate the output connector 5. The dual-stator drive device 3 includes a first stator assembly 31, a second stator assembly 32, a rotor support 33, a rotor assembly 34, and a fixed spindle 35. The first stator assembly 31 is disposed on the inner wall of the drive cavity 11, the fixed spindle 35 is disposed at the axis of the drive cavity 11, the second stator assembly 32 is disposed on the fixed spindle 35, the rotor support 33 is used to fix the rotor assembly 34, and is provided with an output shaft 36, which is connected to the output transmission device 4. The two sides of the rotor assembly 34 are respectively opposite to the first stator assembly 31 and the second stator assembly 32. In this embodiment, by coaxially arranging the first stator assembly 31 and the second stator assembly 32 in the drive cavity 11 of the outer casing 1, and making them work together on the same rotor assembly 34, the electromagnetic drive source is multiplied within a nearly identical structural space. The "inner and outer sandwich" magnetic circuit design of the dual stators and single rotor greatly improves the utilization efficiency of the magnetic field and the air gap magnetic flux density, enabling the motor to output greater torque and power while maintaining a compact size. This increases the motor's power density and meets the requirements of miniaturization, lightweighting, and high-torque drive. The rotor assembly 34 is supported by the rotor bracket 33, with its two sides forming effective air gap working surfaces with the inner and outer stators, respectively. The symmetrical magnetic pull structure helps to counteract unilateral magnetic pull, resulting in a more balanced rotor force, effectively reducing vibration and noise during operation and improving the motor's running stability. Simultaneously, the interaction of the dual stator magnetic fields improves the waveform of the air gap magnetic field, reduces torque pulsation, and makes the output torque smoother and more stable, improving control accuracy at low speeds. The dual stator drive device 3 and the output transmission device 4 are sequentially integrated into the drive cavity 11 and the transmission cavity 21, respectively, and directly drive the transmission device through the output shaft 36, forming a highly integrated power unit. This design eliminates the need for additional couplings or complex connection mechanisms, shortens the transmission chain, reduces space occupation and achieves a compact structure, and effectively reduces energy loss, backlash, and inertia caused by intermediate links, thereby improving transmission efficiency and dynamic response speed. The fixed spindle 35 not only serves to fix the second stator assembly 32, but also constitutes an important structural support and heat conduction path.Heat can be dissipated bidirectionally from the inner stator through the fixed spindle 35 and the outer stator through the outer casing 1, increasing the heat dissipation area, improving the motor's heat dissipation conditions, allowing the motor to operate continuously at higher power, and improving reliability and service life. This embodiment organically combines high torque density, high operational stability, high structural integration, and good heat dissipation, providing a high-performance, compact, and reliable power solution.

[0022] Multiple heat dissipation slots 12 are provided on the outer periphery of the outer casing 1. The heat dissipation slots 12 are used to dissipate heat from the dual-stator drive device 3 inside the drive cavity 11. A fan blade 37 is provided at the bottom of the rotor support 33. When the rotor support 33 rotates, airflow is generated by the fan blade 37 to transfer the hot air in the drive cavity 11 out through the heat dissipation slots 12. In this embodiment, by providing multiple heat dissipation slots 12 on the outer periphery of the outer casing 1 and integrating the fan blade 37 at the bottom of the rotor support 33, a highly efficient active heat dissipation system is formed. When the dual-stator drive device 3 is working, the inner and outer stators and the rotor assembly 34 will generate a large amount of heat. At this time, the fan blade 37, which rotates at high speed with the rotor support 33, generates a strong directional airflow in the drive cavity 11. The airflow can effectively agitate and disperse the hot air accumulated around the stator assembly and the rotor assembly 34, forcing the high-temperature airflow to be continuously and rapidly discharged to the outside of the motor through the heat dissipation slots 12 on the outer casing 1.

[0023] One side of the output mounting base 2 is provided with a connecting inner ring 22 and a connecting outer ring 23. The connecting outer ring 23 is fixedly connected to the outer casing 1, and the connecting inner ring 22 is provided with a first bearing 24, which is connected to the dual-stator drive device 3. In this embodiment, by providing a connecting inner ring 22 and a connecting outer ring 23 on one side of the output mounting base 2, and by fixing the connecting outer ring 23 to the outer casing 1, a stable connection between the output mounting base 2 and the outer casing 1 is ensured, forming the main static structural support of the motor and effectively improving the rigidity and stability of the overall structure. At the same time, the connecting inner ring 22 is rotatably connected to the drive end of the dual-stator drive device 3 (i.e., the output shaft 36 of the rotor support 33) through the first bearing 24.

[0024] An output mounting base 2 is located below the transmission cavity 21 and has a sensing cavity 25. A first sensing element 251 is installed inside the sensing cavity 25, and a second sensing element 252 is installed on the rotor support 33. The first and second sensing elements 251 cooperate to read the rotation angle of the rotor support 33. In this embodiment, by specifically setting an independent sensing cavity 25 below the transmission cavity 21 on the output mounting base 2 and placing the first sensing element 251 inside it, while correspondingly placing the second sensing element 252 on the rotor support 33, a high-precision rotation angle detection system is formed. This achieves non-contact, real-time, and accurate detection of the rotation angle (or position) of the rotor support 33. The physical isolation structure of the sensing cavity 25 is crucial, effectively isolating the precision sensing element from interference such as metal debris and lubricating grease that may be generated during gear meshing within the transmission cavity 21, greatly improving the anti-interference capability and long-term reliability of the detection signal. The acquired accurate angle signal provides key feedback for the closed-loop vector control of the motor, enabling the system to achieve precise torque control, speed regulation, and position servoing.

[0025] An oil baffle 253 is provided between the transmission cavity 21 and the sensing cavity 25 to prevent lubricating oil and other contaminants from entering the sensing cavity 25. In this embodiment, by providing an oil baffle 253 between the transmission cavity 21 and the sensing cavity 25, physical isolation and protection are achieved. An effective physical barrier can reliably prevent lubricating oil used for lubricating gears or any foreign matter such as metal shavings generated in the transmission cavity 21 from entering the sensing cavity 25. This fundamentally prevents lubricating oil from contaminating the sensing components in the sensing cavity 25, keeping the electromagnetic components in the sensing cavity 25 clean.

[0026] The rotor support 33 includes an upper support 331 and a lower support 332. The rotor assembly 34 is provided with a rotor fixing frame 341 and multiple rotor magnets 342, with the rotor magnets 342 mounted on the rotor fixing frame 341. The upper support 331 and the lower support 332 are used to fix both sides of the rotor fixing frame 341, respectively. Specifically, the upper support 331 is provided with a fixing slot 3311, and the lower support 332 is provided with a fixing step 3321. One end of the rotor fixing frame 341 is located in the fixing slot 3311, and the other end is located on the fixing step 3321. The rotor fixing frame 341 is provided with multiple rotor slots 3411, and the rotor magnets 342 are inserted into the rotor slots 3411. The upper support 331 is provided with a second bearing 3312, and the lower support 332 is provided with a third bearing 3322. The upper support 331 is connected to the fixed spindle 35 through the second bearing 3312, and the lower support 332 is connected to the fixed spindle 35 through the third bearing 3322. In this embodiment, a combined rotor support 33 structure consisting of an upper support 331 and a lower support 332 is adopted. The upper support 331 and the lower support 332 fix the rotor fixing frame 341 from both sides. The fixing slot 3311 of the upper support 331 and the fixing step 3321 of the lower support 332 together constitute the axial limiting and radial support of the rotor fixing frame 341. This dual fixing method ensures the overall structural stability and coaxiality of the rotor assembly 34 during high-speed operation, effectively preventing the displacement or loosening of the magnetic tiles due to centrifugal force. In addition, the rotor magnetic tiles 342 are inserted into the dedicated slots of the rotor fixing frame 341, which not only realizes the quick and accurate positioning and installation of the magnetic tiles, but also increases the heat dissipation contact area, which is beneficial to the heat dissipation of the rotor assembly 34. Of particular importance is that the upper support 331 and the lower support 332 are supported at two points by the second bearing 3312 and the third bearing 3322 respectively, which improves the rotational accuracy and dynamic balance of the rotor system, reduces vibration and noise, and provides a key structural guarantee for the dual-stator geared motor to achieve high torque density and stable low-noise operation.

[0027] The output transmission device 4 includes a sun gear 41, a planetary gear 42, and a gear ring 43. The gear ring 43 is fixedly installed in the transmission cavity 21. The sun gear 41 is connected to the drive end of the dual-stator drive device 3. The planetary gear 42 is installed on the output connector 5 and meshes with the sun gear 41 and the gear ring 43 respectively. In this embodiment, by using a planetary gear 42 type output transmission device 4 composed of a sun gear 41, a planetary gear 42, and a fixed gear ring 43, efficient power transmission and speed reduction and torque amplification are achieved. The high-speed, relatively low-torque power output from the dual-stator drive device 3 is smoothly converted into the low-speed, high-torque output required by the output connector 5 via the planetary gear 42 system, perfectly matching the functional requirements of the geared motor. Specifically, the sun gear 41 is directly connected to the drive end as the input, and the power transmission path is clear; the fixed gear ring 43 provides a stable reaction support for the entire system, ensuring the stability of the transmission; while the planetary gear 42 rotates on its own axis while revolving around the sun gear 41, and finally outputs power through the planetary carrier (i.e., the output connector 5).

[0028] A cover plate 26 is provided at the end of the output mounting base 2. The cover plate 26 covers the transmission cavity 21. The cover plate 26 is provided with a fourth bearing 261 and is connected to the output connecting base 5 through the fourth bearing 261. In this embodiment, by providing a cover plate 26 with a fourth bearing 261 at the end of the output mounting base 2, it is possible to effectively prevent external dust and impurities from entering the transmission mechanism (such as the planetary gear set 42) and avoid internal lubricating grease leakage. More importantly, the fourth bearing 261 integrated on the cover plate 26 and the output connecting base 5 form a support point, which, together with the bearing on the rotor support 33, constitutes a multi-point support structure with a larger span for the output shaft 36 system.

[0029] The output connector 5 is provided with a transmission fixing part 51, and the output transmission device 4 is mounted on the transmission fixing part 51. In this embodiment, by providing the transmission fixing part 51 on the output connector 5, the transmission fixing part 51 serves as the direct mounting base for the output transmission device 4 (such as the planet carrier in the planetary gear 42 system), achieving precise integration and efficient load-bearing of the power transmission path. Specifically, by firmly integrating transmission components such as the planetary gear 42 into a whole, the accuracy of the meshing position of each gear is ensured, the complex meshing forces and torques generated during transmission are effectively dispersed, and the rigidity and stability of the transmission system are significantly enhanced.

[0030] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A dual-stator geared motor, characterized in that: The device includes a housing, an output mounting base, a dual-stator drive unit, an output transmission unit, and an output connector. The housing has a drive cavity, the dual-stator drive unit is disposed within the drive cavity, the output mounting base is disposed on one side of the drive cavity and covers it, the output mounting base has a transmission cavity, the drive end of the dual-stator drive unit extends into the transmission cavity, the output transmission unit is disposed within the transmission cavity and connected to the drive end of the dual-stator drive unit, and the output connector is disposed at one end of the transmission cavity and connected to the output transmission unit. The dual-stator drive unit drives the output transmission unit to rotate the output connector. The dual-stator drive unit includes a first stator assembly, a second stator assembly, a rotor support, a rotor assembly, and a fixed main shaft. The first stator assembly is disposed on the inner wall of the drive cavity, the fixed main shaft is disposed at the axis of the drive cavity, the second stator assembly is disposed on the fixed main shaft, the rotor support is used to fix the rotor assembly and is provided with an output shaft, the output shaft is connected to the output transmission unit, and the two sides of the rotor assembly are respectively opposite to the first stator assembly and the second stator assembly.

2. The dual-stator geared motor according to claim 1, characterized in that: The outer periphery of the housing is provided with multiple heat dissipation grooves, which are used to dissipate heat from the dual stator drive device inside the drive cavity; the bottom of the rotor support is provided with fan blades, which generate airflow when the rotor support rotates, and are used to transfer the hot air inside the drive cavity out of the heat dissipation grooves.

3. The dual-stator geared motor according to claim 1, characterized in that: One side of the output mounting base is provided with a connecting inner ring and a connecting outer ring. The connecting outer ring is fixedly connected to the housing. The connecting inner ring is provided with a first bearing and is connected to the dual stator drive device through the first bearing.

4. The dual-stator geared motor according to claim 1, characterized in that: The output mounting base is located on the lower side of the transmission cavity and has a sensing cavity. A first sensing element is provided in the sensing cavity, and a second sensing element is provided on the rotor support. The first sensing element and the second sensing element cooperate with each other to read the rotation angle of the rotor support.

5. The dual-stator geared motor according to claim 1, characterized in that: The rotor support includes an upper support and a lower support. The rotor assembly is provided with a rotor fixing frame and multiple rotor magnets. The rotor magnets are disposed on the rotor fixing frame. The upper support and the lower support are respectively used to fix the two sides of the rotor fixing frame.

6. The dual-stator geared motor according to claim 5, characterized in that: The upper support is provided with a fixing slot, the lower support is provided with a fixing step, one end of the rotor fixing frame is set in the fixing slot and the other end is set on the fixing step; the rotor fixing frame is provided with multiple rotor slots, and the rotor magnet is inserted into the rotor slot.

7. The dual-stator geared motor according to claim 6, characterized in that: The upper support is provided with a second bearing, and the lower support is provided with a third bearing. The upper support is connected to the fixed spindle through the second bearing, and the lower support is connected to the fixed spindle through the third bearing.

8. The dual-stator geared motor according to claim 1, characterized in that: The output transmission device includes a sun gear, planetary gears, and a ring gear. The ring gear is fixedly installed in the transmission cavity. The sun gear is connected to the drive end of the dual stator drive device. The planetary gears are installed on the output connector and mesh with the sun gear and the ring gear respectively.

9. The dual-stator geared motor according to claim 1, characterized in that: The output mounting base is provided with a cover plate at its end, which is used to cover the transmission cavity. The cover plate is provided with a fourth bearing, and the cover plate is connected to the output mounting base through the fourth bearing.

10. The dual-stator geared motor according to claim 1, characterized in that: The output connector is provided with a transmission fixing part, and the output transmission device is mounted on the transmission fixing part.

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