Brushless motor and speed reduction transmission composite integrated motor

Abstract

The utility model relates to the technical field of motors, and discloses a brushless motor and speed reduction transmission composite integrated motor, which comprises a stator bracket, a stator, a rotor, a central shaft, a driving gear, a first speed reduction gear, a first gear ring, a sun gear, a second gear ring, a plurality of planetary gears and a planetary carrier, the driving gear and the rotor are fixed in the circumferential direction. The stator bracket is connected with the first reduction gear, and the driving gear is in meshing transmission with the first reduction gear; the planetary gears are in meshing transmission with the sun gear and the second gear ring and used for driving the planet carrier to rotate relative to the stator. The hub motor or the steering engine has the advantages that the overall weight and size of the hub motor or the steering engine are reduced, the use space is reduced, and the hub motor or the steering engine is suitable for application environments with low rotating speed and small use space.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, in particular to a brushless motor and deceleration transmission composite integral type motor. BACKGROUND

[0002] The rotational speed of the direct drive type wheel hub motor is generally 500-1500r / min, the overall weight is heavy, the volume is large, and the radial dimension is generally not less than 4 inches, the overall occupied use space is large, and it cannot be applied to the application environment with lower rotational speed and smaller use space. The steering engine is usually combined with a servo motor and a fixed shaft deceleration transmission, which is difficult to realize miniaturization, reduce weight and volume. SUMMARY

[0003] The utility model aims at providing a brushless motor and deceleration transmission composite integral type motor, reduce the overall weight and volume of wheel hub motor or steering engine, reduce the use space, and be applicable to the application environment with lower rotational speed and smaller use space.

[0004] In order to realize the above-mentioned purpose, the utility model provides a brushless motor and deceleration transmission composite integral type motor, including stator support, stator, rotor, center shaft, driving gear, first reduction gear, first gear ring, sun gear, second gear ring, a plurality of planetary gears and planet carrier;

[0005] The stator support, the stator and the rotor are sleeved on the center shaft, the stator is fixedly connected with the stator support, and the driving gear is fixedly connected with the rotor in the circumferential direction.

[0006] The stator support is connected with the first reduction gear, and the driving gear is engaged with the first reduction gear for transmission.

[0007] The first reduction gear is engaged with the first gear ring for transmission.

[0008] The first gear ring is provided with a sun gear in the center.

[0009] A plurality of planetary gears are engaged with the sun gear and the second gear ring for transmission, so as to drive the planet carrier to rotate relative to the stator.

[0010] The driving gear, the first gear ring, the second gear ring and the center shaft are coaxially arranged, the second gear ring is sleeved outside the first gear ring, a plurality of planetary gears are arranged in the circumferential direction on the planet carrier and surround the axis of the center shaft.

[0011] Further, a rotating shell is further included, the rotating shell is sleeved outside the second gear ring, and the rotating shell is connected with the planet carrier.

[0012] Further, a supporting shaft is arranged on the stator support and connected with the first reduction gear.

[0013] Further, a supporting body is arranged on the stator support and connected with the driving gear, the supporting body is used for supporting the central shaft or the planet carrier, and a first bearing is arranged on the supporting body.

[0014] Further, a rotating assembly is arranged on the outer side of the stator support and connected with the planet carrier, the rotating assembly comprises a first annular support and a second annular support, the first annular support and the second annular support are arranged along the axial direction of the central shaft, and the opposite sides of the first annular support and the second annular support are matched to form a first sliding groove for arranging the rolling balls.

[0015] Further, a mounting seat and a connecting shaft are arranged on the stator support, the mounting seat is arranged on the end of the stator support away from the driving gear, a second bearing is arranged in the mounting seat and connected with the central shaft, the end of the central shaft close to the second bearing penetrates the mounting seat and extends to the outside of the mounting seat and is connected with the connecting shaft.

[0016] Further, a PCB assembly is arranged on the stator support, and a receiving cavity is arranged on the side of the stator support close to the stator.

[0017] Further, the stator support is circumferentially fixed with the second ring gear.

[0018] Further, the first reduction gear is a double gear, and the number of the first reduction gears is one or more.

[0019] Further, the tooth shape of the driving gear is a helical tooth.

[0020] The utility model discloses a brushless motor and speed reduction transmission composite integral type motor compared with prior art, its beneficial effect lies in: the stator rotates through magnetic field force action and drives the rotor, and the rotor drives the driving gear and is engaged with the first gear ring through the first reduction gear and reduces, and the center of the first gear ring is provided with sun gear, and the sun gear is engaged with the planetary gear, and the planetary gear drives the second gear ring rotation, and further drives the planet carrier rotation, realizes multistage reduction from the driving gear to the planet carrier, can provide lower speed. The first reduction gear, the first gear ring, the second gear ring and a plurality of planetary gears are all arranged on the circumferential side of the central shaft, and the overall structure is compact, reduces the overall volume of the hub motor or rudder, reduces the weight, and is applicable to the application environment of lower speed and smaller space. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the sectional view of the utility model discloses a brushless motor and speed reduction transmission composite integral type motor's embodiment 1;

[0022] Figure 2 It is the sectional view of the utility model discloses a brushless motor and speed reduction transmission composite integral type motor's embodiment 2;

[0023] Figure 3 It is the sectional view of the utility model discloses a brushless motor and speed reduction transmission composite integral type motor's embodiment 3;

[0024] Figure 4 It is the structural schematic diagram of the utility model discloses a brushless motor and speed reduction transmission composite integral type motor's embodiment 2;

[0025] Figure 5 It is the distribution schematic diagram of the utility model discloses a brushless motor and speed reduction transmission composite integral type motor's planetary gear;

[0026] Figure 6 It is the structural schematic diagram of the utility model discloses a brushless motor and speed reduction transmission composite integral type motor's first reduction gear;

[0027] Figure 7 It is the distribution schematic diagram of the utility model discloses a brushless motor and speed reduction transmission composite integral type motor's first reduction gear;

[0028] Figure 8 It is the structural schematic diagram of another embodiment of the utility model discloses a brushless motor and speed reduction transmission composite integral type motor.

[0029] In the figure, 1, stator support; 100, annular protrusion; 101, third bearing; 102, support shaft; 103, accommodating cavity; 2, stator; 3, rotor; 4, central shaft; 5, driving gear; 6, first reduction gear; 61, input transmission teeth; 62, output transmission teeth; 7, first ring gear; 8, sun gear; 9, second ring gear; 10, planetary gear; 11, planet carrier; 111, mounting cavity; 1111, second sliding groove; 112, connecting shaft; 12, rotating assembly; 121, first annular support; 122, second annular support; 123, ball; 124, first sliding groove; 13, support body; 131, first bearing; 14, mounting seat; 141, second bearing; 15, connecting shaft; 151, annular groove; 16, PCB assembly; 17, rotating shell. DETAILED DESCRIPTION

[0030] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0031] In the description of the present application, it should be understood that the positions or location relationships indicated by the terms "upper", "lower", "front", "rear", "inner", "outer" and the like in the present application are based on the position relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as limiting the devices and elements indicated or implied to have a specific position, to be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application.

[0032] In the description of the present application, it should be understood that the terms "first", "second" and the like are used to describe various information in the present application, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, "first" information can also be referred to as "second" information without departing from the scope of the present application, and similarly, "second" information can also be referred to as "first" information.

[0033] Example 1

[0034] As shown in Figure 1 , Figure 6 The present application provides a brushless motor and reduction drive composite integrated motor, which comprises a stator support 1, a stator 2, a rotor 3, a central shaft 4, a driving gear 5, a first reduction gear 6, a first ring gear 7, a sun gear 8, a second ring gear 9, a plurality of planetary gears 10 and a planet carrier 11.

[0035] The stator 2 provides a magnetic field force to drive the rotor 3 to rotate, and further drive the driving gear 5 to rotate. In order to realize multi-stage speed reduction transmission from the driving gear 5 to the planet carrier 11, a relatively low rotating speed lower than 500 r / min can be provided, and the overall weight and volume of the wheel hub motor are reduced, so as to be suitable for low-speed and small-space application scenarios. The stator support 1, the stator 2 and the rotor 3 are sleeved on the central shaft 4. The stator 2 is fixedly connected with the stator support 1. The driving gear 5 is fixedly connected with the rotor 3 in the circumferential direction, that is, the rotor 3 can directly or indirectly drive the driving gear 5 to rotate synchronously. The stator support 1 is connected with the first speed reduction gear 6. The first speed reduction gear 6 can rotate relative to the stator support 1. The driving gear 5 is in meshing transmission with the first speed reduction gear 6.

[0036] The first ring gear 7 is sleeved on the outside of the central shaft 4 and is coaxially arranged with the central shaft 4. The first speed reduction gear 6 is in meshing transmission with the first ring gear 7. The center of the first ring gear 7 is provided with the sun gear 8. In some examples, the sun gear 8 is integrally formed with the first ring gear 7 for easy processing. In some other examples, the sun gear 8 is separately formed with the first ring gear 7, that is, the outer side of the sun gear 8 is provided with a clamping boss connected with the first ring gear 7. The first ring gear 7 is provided with a clamping groove corresponding to the clamping boss. At this time, the first ring gear 7 is sleeved on the outside of the sun gear 8, so as to realize assembly and synchronous rotation.

[0037] The second ring gear 9 is sleeved on the outside of the first ring gear 7 and is coaxially arranged with the central shaft 4. A plurality of planetary gears 10 are arranged in the circumferential direction on the planet carrier 11 and are arranged around the axis of the central shaft 4. The planetary gears 10 are in meshing transmission with the sun gear 8 and the second ring gear 9, so as to drive the planet carrier 11 to rotate relative to the stator 2, and further to be connected with an external mechanism as a power source of the external mechanism.

[0038] Specifically, the speed reduction transmission path from the driving gear 5 to the planet carrier 11 is as follows: the rotor 3 drives the driving gear 5 to rotate, the first speed reduction gear 6 is in meshing speed reduction with the first ring gear 7, the sun gear 8 drives the planetary gears 10, the planetary gears 10 drive the second ring gear 9 to rotate, and further drive the planet carrier 11 to rotate, so as to realize multi-stage speed reduction from the driving gear 5 to the planet carrier 11 and provide a relatively low rotating speed. The plurality of first speed reduction gears 6, the first ring gear 7, the second ring gear 9 and the plurality of planetary gears 10 are distributed on the circumferential side of the central shaft 4, so as to realize compact overall structure, reduce the overall volume of the wheel hub motor or the steering engine, reduce the weight, and make the radial dimension of the motor less than 4 inches, so as to be suitable for low-speed and small-space application environment. In the embodiment, the radial dimension of the motor is 36 mm, that is, the outer diameter of the planet carrier 11 is 36 mm, which is much smaller than 4 inches.

[0039] In the embodiment, the sun gear 8, the second ring gear 9 and the planetary gears 10 form a planetary transmission. In some other examples, the planetary transmission can be one-stage or multi-stage transmission, which can be adjusted according to actual application requirements.

[0040] In the embodiment, in order to facilitate the support and guide when the planet carrier 11 rotates, referring to Figure 1 , the outer side of the stator support 1 is sleeved with a rotating assembly 12 for connecting with the planet carrier 11. Specifically, the rotating assembly 12 comprises a first annular support 121, a second annular support 122 and a plurality of balls 123. The first annular support 121 and the second annular support 122 are arranged along the axial direction of the central shaft 4. The opposite sides of the first annular support 121 and the second annular support 122 are matched to form a first sliding groove 124 for mounting the balls 123. The balls 123 can roll in the first sliding groove 124. The planet carrier 11 is internally provided with a mounting cavity 111. One end of the mounting cavity 111 towards the stator support 1 is provided with an opening. The first annular support 121 and the second annular support 122 are arranged in the mounting cavity 111 and sleeved on the outer side of the stator support 1. The side wall of the mounting cavity 111 is provided with a second sliding groove 1111 corresponding to the balls 123. That is, when the planet carrier 11 rotates, the rotation of the planet carrier 11 is supported by the balls 123, so as to avoid the deflection of the planet carrier 11. At the same time, the rotating assembly 12 can also serve as the rolling support of the rotating shell 17. In some embodiments, the rotating assembly 12 can be arranged on the shaft. In the embodiment, the arrangement on the outer side of the stator 2 can reduce the axial length and be more optimized.

[0041] In the embodiment, one end of the central shaft 4 is fixedly connected with the rotor 3, and the other end is fixedly sleeved with the driving gear 5. That is, the rotor 3 synchronously drives the central shaft 4 and the driving gear 5 to rotate.

[0042] Further, according to different loads driven by the planet carrier 11, that is, different weights of the external mechanism, the number of the first reduction gear 6 can be designed. The greater the load, the more the number of the first reduction gear 6. Therefore, the number of the first reduction gear 6 is one or more. When the number of the first reduction gear 6 is more than one, referring to Figure 7 , the first reduction gears 6 are uniformly distributed around the axis of the central shaft 4. Since the first reduction gear 6 needs to be engaged with the driving gear 5 and the first ring gear 7 for transmission at the same time, in the embodiment, the first reduction gear 6 adopts a double-tooth gear. Specifically, referring to Figure 6 , the first reduction gear 6 has an input transmission tooth 61 and an output transmission tooth 62. The input transmission tooth 61 is engaged with the driving gear 5 for transmission, and the output transmission tooth 62 is engaged with the first ring gear 7 for transmission.

[0043] Further, in order to protect the transmission mechanism in the motor, a rotating shell 17 is further included. In the embodiment, the rotating shell 17 is sleeved on the outer side of the second ring gear 9. The rotating shell 17 is connected with the planet carrier 11. In some embodiments, in order to facilitate processing, the rotating shell 17 is integrally formed with the planet carrier 11, or can be separately processed.

[0044] Further, in the embodiment, in order to facilitate the installation of the first reduction gear 6, the stator support 1 is provided with a support shaft 102 for connecting with the first reduction gear 6.

[0045] Further, in order to facilitate the rotation of the rotor 3 to drive the driving gear 5, in the embodiment, referring to Figure 1 , one end of the central shaft 4 is fixedly connected with the rotor 3, and the other end is fixedly connected with the driving gear 5. The central shaft 4 is rotatably connected with the stator support 1. That is, the rotor 3 drives the central shaft 4 to rotate, and then drives the driving gear 5 to rotate, thereby achieving the rotational driving of the planet carrier 11. In the embodiment, the stator support 1 and the central shaft 4 are separately arranged, and the central shaft 4 can rotate relative to the stator support 1.

[0046] Further, in the embodiment, in order to facilitate the installation of the sun gear 8 and the auxiliary support of the planet carrier 11, as shown in Figure 1 , a support body 13 is further included. The support body 13 is connected to one end of the stator support 1 close to the driving gear 5. An installation column is arranged on the side of the support body 13 away from the central shaft 4. The sun gear 8 is sleeved on the installation column. The support body 13 is used to support the central shaft 4 or the planet carrier 11. The support body 13 is provided with a first bearing 131. The first bearing 131 is used to assemble with the central shaft 4 or the planet carrier 11. As shown in Figure 1 , the outer ring of the first bearing 131 is connected with the planet carrier 11, and the inner ring is connected with the support body 13.

[0047] Further, in the embodiment, in order to facilitate the rotational connection of the central shaft 4 and the stator support 1 and simplify the structure, an annular protrusion 100 is arranged in the stator support 1 in the axial direction. A third bearing 101 is arranged in the annular protrusion 100. The central shaft 4 penetrates through the third bearing 101. One end of the central shaft 4 is fixedly connected with the driving gear 5, and the other end is fixedly connected with the stator support 1.

[0048] Further, in some embodiments, in order to facilitate the installation of the second ring gear 9, the second ring gear 9 is fixed in the circumferential direction of the stator support 1. Alternatively, according to actual installation requirements, the second ring gear 9 is rotatably connected with the stator support 1, that is, the second ring gear 9 can rotate relative to the stator support 1.

[0049] Further, in order to facilitate the control of the rotation of the motor, a PCB assembly 16 is further included. The PCB assembly 16 is electrically connected with the stator 2. In order to facilitate the arrangement of the position of the PCB assembly 16, as shown in Figure 1 , a receiving cavity 103 is arranged on the side of the stator support 1 facing the stator 2. The PCB assembly is arranged in the receiving cavity 103.

[0050] Embodiment 2

[0051] As shown in Figure 2 ,Figure 4 、 Figure 5 As shown in FIG. 2, this embodiment is a further improvement based on embodiment 1, which is specifically as follows:

[0052] In order to realize the synchronous driving of both ends of the motor, that is, one end of the motor is connected with an external mechanism through the planet carrier 11, and the other end can also be connected with another external mechanism to realize the synchronous driving of both ends, the mounting seat 14 and the connecting shaft 15 are further included, wherein the mounting seat 14 is detachably connected to the end of the stator support 1 away from the driving gear 5, in order to improve the stability of the rotation of the central shaft 4 and at the same time reduce the processing difficulty of the central shaft 4, the second bearing 141 for connecting with the central shaft 4 is arranged in the mounting seat 14, the end of the central shaft 4 close to the second bearing 141 penetrates through the mounting seat 14 and extends to the outside of the mounting seat 14 to be connected with the connecting shaft 15, wherein the connecting shaft 15 is used to connect with the external mechanism, since the central shaft 4 is longer and the processing precision is higher, therefore, in this embodiment, the central shaft 4 and the connecting shaft 15 are segmented and then welded and fixed. At the same time, in this embodiment, the mounting seat 14 and the stator support 1 are detachably connected through screws.

[0053] In order to further improve the stability of the rotation of the central shaft 4, the central shaft 4 is supported, therefore, referring to FIG. 3, the central shaft 4 is sleeved with two first bearings 131, one of which is arranged in the support body 13, and the other is arranged outside the support body 13 and connected with the planet carrier 11. Further, in order to facilitate the axial limiting when the connecting shaft 15 is connected with the external mechanism, the side wall of the connecting shaft 15 is provided with an annular groove 151 for installing a snap spring. Figure 2 Embodiment 3

[0054] As shown in FIG. 4, this embodiment is a further improvement based on embodiment 2, which is specifically as follows:

[0055] Figure 3 In embodiments 1 and 2, since the PCB assembly 16 is arranged between the stator support 1 and the rotor 3, it is not convenient to disassemble when the PCB assembly 16 is maintained, and the stator 2, the rotor 3 and the central shaft 4 need to be disassembled as a whole before the PCB assembly 16 can be maintained. Therefore, in this embodiment, the installation direction of the rotor 3 is adjusted, which is opposite to the installation direction in embodiments 1 and 2, and the PCB assembly 16 is arranged in the accommodating cavity 103, since the mounting seat 14 and the stator support 1 are detachably connected, when the PCB assembly 16 needs to be maintained, the mounting seat 14 can be disassembled.

[0056] In embodiments 1 and 2, since the PCB assembly 16 is arranged between the stator support 1 and the rotor 3, it is not convenient to disassemble when the PCB assembly 16 is maintained, and the stator 2, the rotor 3 and the central shaft 4 need to be disassembled as a whole before the PCB assembly 16 can be maintained. Therefore, in this embodiment, the installation direction of the rotor 3 is adjusted, which is opposite to the installation direction in embodiments 1 and 2, and the PCB assembly 16 is arranged in the accommodating cavity 103, since the mounting seat 14 and the stator support 1 are detachably connected, when the PCB assembly 16 needs to be maintained, the mounting seat 14 can be disassembled.

[0057] ​In the above-mentioned embodiments 1, 2 and 3, the number of the planetary gears 10 is at least two, and the number of the planetary gears 10 can be adjusted according to actual transmission requirements. In some preferred embodiments, the number of the planetary gears 10 is three, and the angle between the axis of the adjacent planetary gear 10 and the axis of the center shaft 4 is 120°. Further, in order to facilitate the installation of the planetary gear 10, the side wall of the planet carrier 11 facing the stator is provided with a connecting shaft 112 for supporting the rotation of the planetary gear 10. The connecting shaft 112 can be designed in one piece with the planet carrier 11. In some other embodiments, the planet carrier 11 is made of plastic material. In order to ensure the supporting strength of the connecting shaft 112, the connecting shaft 112 is made of metal material. At this time, the planet carrier 11 and the connecting shaft 112 are connected in a split type, and the connection between the planet carrier 11 and the connecting shaft 112 can be adaptively adjusted according to actual installation requirements.

[0058] Further, in order to improve the stability of the transmission between the driving gear 5 and the first reduction gear 6, the tooth shape of the driving gear 5 and the input transmission tooth 61 is helical tooth, which can further reduce the size of the reduction hub motor in the axial direction. In order to further reduce the overall weight of the hub motor, the input transmission tooth 61 is made of plastic material. At the same time, in order to improve the overall structural strength of the planetary gear, which is beneficial to drive external mechanisms, the planetary gear is made of metal material, such as stainless steel.

[0059] In some other embodiments, referring to Figure 8 , in order to simplify the overall structure of the motor, the stator support 1 and the center shaft 4 are designed in one piece, that is, the stator 2 can be directly fixed and sleeved on the center shaft 4, which can meet the installation requirements of the corresponding parts. At the same time, the center shaft 4 can be a hollow shaft, which is convenient for the winding of the stator coil and the wiring.

[0060] In addition, when the internal space of the stator 2 is large, all or part of the above-mentioned reduction transmission structure can be arranged in the internal space of the stator 2 to reduce the axial size of the motor. At the same time, the center shaft 4 can be through both ends or hollow, and the structure of the reduction transmission structure or the center shaft 4 can be adaptively adjusted according to actual use requirements.

[0061] In summary, the utility model discloses a kind of brushless motor and reduction drive composite integrated motor, stator 2 is driven rotor 3 rotation by magnetic field force effect, rotor 2 drives driving gear 5 and is engaged with first reduction gear 6 and first gear ring 7 reduction, the center of first gear ring 7 is provided with sun gear 8, sun gear 8 is engaged with planetary gear 10, planetary gear 10 drives second gear ring 9 rotation, further drives planetary carrier 11 rotation, realize by driving gear 5 to the multistage reduction of planetary carrier 11, it can provide lower speed. First reduction gear 6, first gear ring 7, second gear ring 9 and multiple planetary gear 10 are all arranged at the circumferential side of central shaft 4, overall structure is compact, reduces the overall volume of wheel hub motor or rudder, reduce weight, suitable for lower speed and smaller application environment of use space.

[0062] The above is only preferred embodiment of the utility model, and the utility model is exemplified by brushless outer rotor motor in the embodiment, and the same effect can be achieved by using inner rotor brushless motor or hollow cup motor etc., it should be pointed out that, for ordinary skilled person in the art, under the premise of not departing from the technical principle of the utility model, a number of improvements and substitutions can be made, and these improvements and substitutions should be regarded as the protection scope of the utility model.

Claims

1. A brushless motor and reduction drive combined integrated motor, characterized in that: The application relates to a motor, which comprises a stator support, a stator, a rotor, a central shaft, a driving gear, a first reduction gear, a first ring gear, a second ring gear, a plurality of planetary gears and a planet carrier. The stator support, the stator and the rotor are sleeved on the central shaft, the stator is fixedly connected with the stator support, and the driving gear is fixedly arranged in the circumferential direction of the rotor. The stator support is connected with the first reduction gear, and the driving gear is in meshing transmission with the first reduction gear. The first reduction gear is in meshing transmission with the first ring gear. The first ring gear is provided with a sun gear in the center. The plurality of planetary gears are in meshing transmission with the sun gear and the second ring gear, and are used for driving the planet carrier to rotate relative to the stator. The driving gear, the first ring gear, the second ring gear and the central shaft are coaxially arranged, the second ring gear is sleeved outside the first ring gear, the plurality of planetary gears are arranged in the circumferential direction of the planet carrier and are arranged around the axis of the central shaft.

2. The brushless motor and reduction drive integrated motor of claim 1, wherein: The motor further comprises a rotating shell, which is sleeved outside the second ring gear and is connected with the planet carrier.

3. The brushless motor and reduction drive integrated motor of claim 1, wherein: The stator support is provided with a supporting shaft for rotationally connecting with the first reduction gear.

4. The brushless motor and reduction drive integrated motor of claim 1, wherein: The motor further comprises a supporting body, which is connected to one end of the stator support close to the driving gear, is used for supporting the central shaft or the planet carrier, and is provided with a first bearing.

5. The brushless motor and reduction drive integrated motor of claim 1, wherein: The stator support is sleeved with a rotating assembly for connecting with the planet carrier, the rotating assembly comprises a first annular support, a second annular support and a plurality of balls, the first annular support and the second annular support are arranged in the axial direction of the central shaft and are spaced apart, opposite side surfaces of the first annular support and the second annular support cooperatively form a first sliding groove for mounting the balls, an installation cavity is formed in the planet carrier, one end of the installation cavity close to the stator support is provided with an opening, the first annular support and the second annular support are arranged in the installation cavity, and a second sliding groove corresponding to the balls is formed in the side wall of the installation cavity.

6. The brushless motor and reduction drive integrated motor of claim 1, wherein: The motor further comprises a mounting seat and a connecting shaft, the mounting seat is detachably connected to one end of the stator support away from the driving gear, the mounting seat is provided with a second bearing for connecting with the central shaft, one end of the central shaft close to the second bearing penetrates through the mounting seat and extends out of the mounting seat to be connected with the connecting shaft.

7. The brushless motor and reduction drive integrated motor of claim 1, wherein: The motor further comprises a PCB assembly, one side of the stator support close to the stator is provided with a containing cavity, and the PCB assembly is arranged in the containing cavity.

8. The brushless motor and reduction drive integrated motor of claim 1, wherein: The stator support is fixedly arranged in the circumferential direction of the second ring gear.

9. The brushless motor and reduction drive integrated motor of claim 1, wherein: The first reduction gear is a double gear, and the number of the first reduction gears is one or more.

10. The brushless motor and reduction drive integrated motor of claim 1, wherein: The teeth of the driving gear are helical teeth.

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