Disc type multi-layer outer rotor motor

Abstract

The invention relates to the technical field of disc type outer rotor motors, in particular to a disc type multilayer outer rotor motor which comprises a fixed shaft and further comprises an outer rotor assembly and an inner stator assembly, the outer rotor assembly is rotationally installed on the fixed shaft, and the inner stator assembly is fixedly installed on the fixed shaft. The inner stator assembly is located between the outer rotor assembly and the fixed shaft, multiple layers of disc type units are formed between the outer rotor assembly and the inner stator assembly, the multiple layers of disc type units are sequentially arranged in the axial direction of the fixed shaft, and a heat dissipation mechanism is arranged on the inner stator assembly. The multi-layer disc type unit is arranged on the fixed shaft, so that the load of the outer rotor motor can be improved, enough torque and power can be provided to drive the load, the heat dissipation mechanism arranged on the inner stator assembly is matched for heat dissipation, the heat generated inside can be dissipated in time, and the efficiency, the performance and the service life of the motor are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of disc type outer rotor motors, in particular to a disc type multi-layer outer rotor motor. Background Art

[0002] Due to the performance advantages of disc outer rotor motors such as high power density, compact structure, high efficiency and low moment of inertia, disc outer rotor motors are widely used in electric vehicles, aerospace, wind power generation and robotics. However, disc motors may not be suitable for large load occasions, such as large mechanical equipment, large power equipment, etc. Under large load conditions, disc motors may have problems such as unstable speed and low output power, affecting the normal operation of the equipment. The existing disc outer rotor motors have limited adaptability to loads, mainly due to the combined effect of multiple factors such as structural limitations, heat dissipation problems, materials, technical limitations, dynamic performance and cost considerations. As a result, when the disc outer rotor motor is dealing with large loads, the motor may not be able to provide sufficient torque and power to drive the load. At the same time, under large load conditions, the heat generated inside the motor may not be dissipated in time, causing the motor to overheat. Overheating will not only reduce the efficiency of the motor, but may also have a negative impact on the performance and life of the motor. Summary of the invention

[0003] The technical problem to be solved by the present invention is: in order to solve the problem that the existing disc-type outer rotor motor cannot provide sufficient torque and power to drive the load under large load and the heat generated inside cannot be dissipated in time, resulting in motor overheating, which not only reduces the efficiency of the motor but may also have a negative impact on the performance and life of the motor, a disc-type multi-layer outer rotor motor is now provided.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a disc-type multi-layer outer rotor motor, comprising a fixed shaft, an outer rotor assembly and an inner stator assembly, wherein the outer rotor assembly is rotatably mounted on the fixed shaft, the inner stator assembly is fixedly mounted on the fixed shaft, the inner stator assembly is located between the outer rotor assembly and the fixed shaft, a multi-layer disc unit is formed between the outer rotor assembly and the inner stator assembly, the multi-layer disc units are sequentially arranged along the axial direction of the fixed shaft, and a heat dissipation mechanism is arranged on the inner stator assembly; The outer rotor assembly in each layer of the disk unit includes a rotor drum, the rotor drum includes a first body of an annular structure, the outer circumference of both ends of the first body is provided with flanges protruding outward, the flanges at both ends of the first body are arranged along the axial direction of the fixed axis and form an inwardly recessed placement groove between the first body, the end faces of both ends of the first body along the axial direction of the fixed axis are provided with a plurality of magnetic steels, the plurality of magnetic steels are arranged in the placement grooves and distributed along the circumference of the first body, the inner stator assembly in each layer of the disk unit includes a stator core, the stator core includes two second bodies of annular structure, the two second bodies are respectively arranged in the placement grooves at both ends of the first body, the two second bodies are provided with coil assemblies opposite to the magnetic steels, and the coil assemblies in the multi-layer disk units are connected in parallel with each other. Compared with the prior art, the present solution arranges multi-layer disk units on the fixed axis, which can not only increase the load of the outer rotor motor, but also provide sufficient torque and power to drive the load, and at the same time cooperate with the heat dissipation mechanism arranged on the inner stator assembly for heat dissipation, and can timely dissipate the internally generated heat to ensure the efficiency, performance and life of the motor.

[0005] In order to fix the second body on the fixed shaft, in some preferred embodiments, the inner stator assembly further includes two stator mounting plates, the two stator mounting plates are arranged corresponding to the two second bodies, the second body is fixed on the corresponding stator mounting plates, the second body is located between the stator mounting plates and the magnetic steel, the stator mounting plates are arranged in the placement groove and have a gap, and the stator mounting plates on the multi-layer disc units are all installed on the fixed shaft. The corresponding second body is fixed on the stator mounting plate, and then the stator mounting plates on the multi-layer disc units are fixed on the fixed shaft, so as to fix the stator core on the fixed shaft.

[0006] In order to realize the parallel connection between coil assemblies on multiple layers of disc-type units, some preferred embodiments are that each layer of the disc-type units is provided with a terminal fixed on the stator mounting plate, the terminal located on one of the two stator mounting plates is a male connection head, the terminal located on the other of the two stator mounting plates is a female connection head, the coil assemblies are correspondingly connected to the terminal posts, and the female connection heads of the terminal posts on the disc-type units on the previous layer of the disc-type units on the adjacent two layers are butted with the male connection heads of the terminal posts on the disc-type units on the next layer. By providing the male connection heads of the terminal posts on one of the two stator mounting plates on each layer, and providing the female connection heads of the terminal posts on the other stator mounting plate, and the coil assemblies on each layer of the disc-type units are connected in parallel to the corresponding terminal posts, and the male connection heads and female connection heads of the corresponding terminal posts between the adjacent two layers of the disc-type units are butted, the coil assemblies between the multiple layers of the disc-type units are mutually connected in parallel.

[0007] In order to realize the heat dissipation mechanism, some preferred embodiments include cooling water pipes arranged on two stator cores in each layer of disk units, one end of the cooling water pipes is an input port, and the other end of the cooling water pipes is an output port. The fixed shaft is provided with an input channel for inputting cooling medium and an output channel for outputting cooling medium. The input port of the cooling water pipe on each layer of the disk units is connected to the input channel, and the output port of the cooling water pipe on each layer of the disk units is connected to the output channel. By arranging cooling water pipes on the two stator cores of each layer of the disk units, and the input ports of the cooling water pipes on the multi-layer disk units are all connected to the input channel on the fixed shaft, and the output ports of the cooling water pipes on the multi-layer disk units are all connected to the output channel on the fixed shaft, the cooling medium is input into the input channel on the fixed shaft and input through the input port of the cooling water pipe on each layer of the disk units, the cooling medium performs heat exchange with the stator core, and the medium with heat is discharged through the output port of the cooling water pipe to the output channel on the fixed shaft, thereby realizing heat dissipation of the internal stator assembly.

[0008] In order to ensure the stable and reliable operation of the disc unit, in some preferred embodiments, the coil assembly is arranged at one end of the stator core close to the magnetic steel, and the cooling water pipe is arranged at one end of the stator core away from the magnetic steel. Placing the coil assembly at one end of the stator core close to the magnetic steel, and placing the cooling water pipe at one end of the stator core away from the magnetic steel, that is, it can be understood that the coil assembly and the cooling water pipe are respectively arranged at both ends of the stator core, which can ensure the stable and reliable operation of the disc unit and the stable and reliable heat dissipation of the disc unit.

[0009] In order to improve the heat dissipation efficiency of the stator core, in some preferred embodiments, the cooling water pipe is arranged in a meandering manner along the circumferential direction of the stator core. By arranging the cooling water pipe on the stator core in a meandering manner, the contact surface between the stator core and the cooling water pipe is increased, and the path for the cooling medium in the cooling water pipe to flow through the stator core is increased, so that the heat exchange between the cooling medium in the cooling water pipe and the stator core is better ensured, and the heat dissipation efficiency of the stator core is improved.

[0010] In some preferred embodiments, the outer rotor assembly further comprises an outer steel cylinder, and the rotor drum in each layer of the disc unit is fixedly connected to the outer steel cylinder.

[0011] In some preferred embodiments, the rotor roller in each layer of the disc unit is fixedly connected to the outer steel cylinder by a key connection, a long groove is provided on the inner circumferential wall of the outer steel cylinder along its axial direction, a first key groove is provided on the outer circumferential wall of the rotor roller in each layer of the disc unit, the first key groove and the long groove in each layer of the disc unit are arranged correspondingly, and a key is provided between the first key groove and the long groove in each layer of the disc unit.

[0012] In some preferred embodiments, end covers are fixedly mounted at both ends of the outer steel cylinder, and the end covers at both ends of the outer steel cylinder are rotatably mounted on a fixed shaft, and a cavity is formed between the fixed shaft, the outer steel cylinder and the end covers at both ends.

[0013] In some preferred embodiments, both ends of the fixed shaft are fixedly connected with fixing seats, the outer rotor assembly and the inner stator assembly are located between the fixing seats at both ends, and the fixing seats are used to fix the fixed shaft.

[0014] The beneficial effects of the present invention are as follows: when a disc-type multi-layer outer rotor motor of the present invention is in use, a multi-layer disc-type unit is arranged on a fixed shaft, which can not only increase the load of the outer rotor motor and provide sufficient torque and power to drive the load, but also cooperate with the heat dissipation mechanism arranged on the inner stator component to dissipate heat, and can dissipate the heat generated inside in time, thereby ensuring the efficiency of the motor, the performance of the motor and the life of the motor, and avoiding the problem that the existing disc-type outer rotor motor cannot provide sufficient torque and power to drive the load under large load and the heat generated inside may not be dissipated in time, resulting in overheating of the motor. Overheating not only reduces the efficiency of the motor, but also may have a negative impact on the performance and life of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a front view of the present invention; Figure 3 It is a left side view of the present invention; Figure 4 is a top view of the present invention; Figure 5 yes Figure 3 Middle AA section view; Figure 6 yes Figure 5 A partial enlarged view of B in the middle; Figure 7 It is a three-dimensional structural schematic diagram of the installation structure between the rotor steel cylinder, the inner stator assembly and the fixed shaft in the present invention; Figure 8 It is a front view of the installation structure between the rotor steel cylinder, the inner stator assembly and the fixed shaft in the present invention; Fig. 9 It is a left side view of the installation structure between the rotor steel cylinder, the inner stator assembly and the fixed shaft in the present invention; Fig.10 It is a right side view of the installation structure between the rotor steel cylinder, the inner stator assembly and the fixed shaft in the present invention; Fig.11 yes Figure 8Middle CC section view; Fig.12 yes Fig.11 A partial enlarged view of D in the middle; Fig.13 is a schematic diagram of the three-dimensional structure of the outer rotor assembly in the present invention; Fig.14 is a front view of the outer rotor assembly of the present invention; Fig.15 yes Fig.14 Middle EE section view; Fig.16 is a schematic diagram of the three-dimensional structure of the inner stator assembly in the present invention; Fig.17 is a front view of the inner stator assembly of the present invention; Fig.18 It is a left side view of the inner stator assembly of the present invention; Fig.19 yes Fig.18 Cross-sectional view of the middle FF; Fig. 20 yes Fig.19 Enlarged view of middle G; Fig.21 It is a schematic diagram of the three-dimensional structure of a single-layer disk unit in the present invention; Fig. 22 It is a front view of a single-layer disc unit in the present invention; Fig.23 It is a left side view of a single layer disk unit in the present invention; Fig.24 It is a right side view of a single layer disk unit in the present invention; Fig.25 yes Fig.23 Middle GG section view; Fig.26 It is a schematic diagram of the three-dimensional structure of the stator core on one side of the disc-type unit in the present invention; Fig. 27 It is a front view of the stator core on one side of the disc unit in the present invention; Fig.28 It is a left side view of the stator core on one side of the disc unit in the present invention; Fig.29 yes Fig. 27 Cross-sectional view of middle HH; Fig.30 yes Fig.28 Sectional view of middle II; Fig.31 It is a schematic diagram of the three-dimensional structure between the rotor drum and the magnetic steel in the present invention; Fig.32 This is a front view between the rotor drum and the magnetic steel in the present invention; Fig.33 yes Fig.32 Middle JJ section view.

[0017] In the figure: 1. Fixed axis; 2. outer rotor assembly, 201, rotor drum, 2011, first body, 2012, flange, 2013, placement groove, 202, magnetic steel, 203, outer steel cylinder, 204, end cover; 3. Inner stator assembly, 301, stator core 3011, second body, 3012, coil assembly, 3013, stator mounting plate, 302, terminal, 3021, male connector, 3022, female connector; 4. heat dissipation mechanism, 401. cooling water pipe, 402. output channel, 403. input channel, 404. heat dissipation hole group; 5. Fixed seat; 6. Hollow body. DETAILED DESCRIPTION

[0018] The present invention is further described in detail below in conjunction with embodiments: The present invention is not limited to the following specific embodiments. A person skilled in the art can implement the present invention in various other specific embodiments according to the contents disclosed in the present invention, or any simple changes or modifications made to the design structure and ideas of the present invention fall within the protection scope of the present invention. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0021] like Figure 1-33 As shown, a disc-type multi-layer outer rotor motor comprises a fixed shaft 1, an outer rotor assembly 2 and an inner stator assembly 3, wherein the outer rotor assembly 2 is rotatably mounted on the fixed shaft 1, the inner stator assembly 3 is fixedly mounted on the fixed shaft 1, the inner stator assembly 3 is located between the outer rotor assembly 2 and the fixed shaft 1, a multi-layer disc-type unit is formed between the outer rotor assembly 2 and the inner stator assembly 3, the multi-layer disc-type units are sequentially arranged along the axial direction of the fixed shaft 1, and a heat dissipation mechanism 4 is arranged on the inner stator assembly 3; The outer rotor assembly 2 in each layer of the disc unit includes a rotor drum 201, and the rotor drum 201 includes a first body 2011 of an annular structure. Outwardly protruding flanges 2012 are arranged on the outer circumferences of both ends of the first body 2011. The flanges 2012 at both ends of the first body 2011 are arranged axially along the fixed shaft 1. The flanges 2012 at both ends of the first body 2011 respectively form inwardly concave placement grooves 2013 with the first body 2011, that is, two inwardly concave placement grooves 2013 are arranged at both ends of the first body 2011. A plurality of magnetic steels 202 are arranged on the end surfaces of both ends of the first body 2011 along the axial direction of the fixed shaft 1. The plurality of magnetic steels 202 are arranged in the placement grooves 2013 and are evenly distributed along the circumference of the first body 2011. The inner stator assembly 3 in each layer of the disc unit includes a stator core 301, and the stator core 301 includes two second bodies 3011 of annular structure. The two second bodies 3011 are respectively arranged in the placement grooves 2013 at both ends of the first body 2011, and the two second bodies 3011 are each provided with a coil assembly 3012 opposite to the magnetic steel 202. The coil assemblies 3012 in the multi-layer disc units are connected in parallel with each other.

[0022] The inner stator assembly 3 also includes two stator mounting plates 3013, which are arranged corresponding to the two second bodies 3011. The second bodies 3011 are fixed on the corresponding stator mounting plates 3013. The two stator mounting plates 3013 are fixedly connected to each other by welding. The welding is also to ensure that the inner stator assembly 3 is stable and reliable during operation. The second body 3011 is located between the stator mounting plate 3013 and the magnetic steel 202. The stator mounting plate 3013 is arranged in the placement groove 2013 and has a gap. The stator mounting plates 3013 on the multi-layer disc unit are fixedly connected to each other by welding. 3 are all installed on the fixed shaft 1. In this embodiment, the two stator mounting plates 3013 of each layer of the disc unit are provided with a first mounting hole along the axial direction thereof, and one end of the fixed shaft 1 is provided with a second mounting hole along the axial direction thereof. The first mounting hole and the second mounting hole are arranged correspondingly. One end of the pull rod passes through the first mounting hole on the stator mounting plate 3013 in each layer of the disc unit, and then passes through the second mounting hole at one end of the fixed shaft 1 and is threadedly connected with a nut, so that the stator mounting plates 3013 are fixedly installed on the fixed shaft 1 through the pull rod, and at the same time, the stator mounting plates 3013 are circumferentially limited with the fixed shaft 1 through keyways.

[0023] Each layer of disc units is provided with three terminals 302 fixed on the stator mounting plate 3013. The three terminals 302 are located on one of the two stator mounting plates 3013 as connecting male heads 3021, and the three terminals 302 are located on the other stator mounting plate 3013 of the two stator mounting plates 3013 as connecting female heads 3022. The coil components 3012 are correspondingly connected to the three terminals 302. The connecting female heads 3022 of the terminals 302 on the first layer of disc units on two adjacent layers of disc units are connected with the connecting male heads 3021 of the terminals 302 on the second layer of disc units to realize the parallel connection of the coil components 3012 between the multiple layers of disc units. One end of the fixed shaft 1 is provided with a threading hole along its axial direction. Three cables pass through the threading holes and are respectively connected to the three terminals 302 at one end of the inner stator component 3.

[0024] The heat dissipation mechanism 4 includes a cooling water pipe 401 arranged on two stator cores 301 in each layer of disc units, one end of the cooling water pipe 401 is an input port, and the other end of the cooling water pipe 401 is an output port. One end of the fixed shaft 1 is provided with an input channel 403 and an output channel 402 along its axial direction, the input channel 403 is used for cooling medium input, and the output channel 402 is used for cooling medium output. A first channel and a second channel are arranged on the stator mounting plate 3013 on each layer of disc units. The first channels between two adjacent layers of disc units are interconnected through quick-insert water pipe joints to achieve mutual communication between the first channels of the multi-layer disc units, and the second channels between two adjacent layers of disc units are interconnected through quick-insert water pipe joints to achieve mutual communication between the second channels of the multi-layer disc units. The input port of the cooling water pipe 401 on each layer of the disc units is connected to the input channel 403 through the first channel, and the output port of the cooling water pipe 401 on each layer of the disc units is connected to the output channel 402 through the second channel.

[0025] In addition, heat dissipation hole groups 404 are provided on the stator mounting plates 3013 on both sides of each layer of disk-type units. The heat dissipation hole groups 404 are composed of multiple heat dissipation holes along the fixed axis 1 and are staggered in the same direction. The heat dissipation holes are in a waist-shaped row. There are six heat dissipation hole groups 404 evenly distributed along the circumferential direction of the stator mounting plate 3013. The heat dissipation hole groups 404 on the stator mounting plates 3013 in two adjacent layers of disk-type units are arranged correspondingly. The heat in the disk-type units on one side can be transferred to the disk-type units on the other side through the heat dissipation hole groups 404 on the stator mounting plate 3013.

[0026] The coil assembly 3012 is arranged at one end of the stator core 301 close to the magnetic steel 202 , and the cooling water pipe 401 is arranged at one end of the stator core 301 away from the magnetic steel 202 . The cooling water pipe 401 is arranged in a zigzag manner along the circumferential direction of the stator core 301 .

[0027] The outer rotor assembly 2 also includes an outer steel cylinder 203. The rotor rollers 201 in each layer of the disc unit are fixedly connected to the outer steel cylinder 203. The rotor rollers 201 in each layer of the disc unit are fixedly connected to the outer steel cylinder 203 via a key connection. A long groove is arranged along the axial direction of the inner circumferential wall of the outer steel cylinder 203. A first key groove is arranged on the outer circumferential wall of the rotor rollers 201 in each layer of the disc unit. The first key groove and the long groove in each layer of the disc unit are arranged correspondingly, and a key is arranged between the first key groove and the long groove in each layer of the disc unit.

[0028] End covers 204 are fixedly installed at both ends of the outer steel cylinder 203. The end covers 204 at both ends of the outer steel cylinder 203 are rotatably installed on the fixed shaft 1. A cavity 6 is formed between the fixed shaft 1, the outer steel cylinder 203 and the end covers 204 at both ends. The inner stator assembly 3 is arranged in the cavity 6.

[0029] Both ends of the fixing seat 5 are fixedly connected with a fixing seat 5, the outer rotor assembly 2 and the inner stator assembly 3 are located between the fixing seats 5 at both ends, and the fixing seat 5 is used to fix the fixed shaft 1 to achieve the required fixing place of the disc-type multi-layer outer rotor motor.

[0030] When installing the above-mentioned disc-type multi-layer outer rotor motor, firstly, the fixing seat 5 is fixedly installed at the desired position by screws, and then the external cooling medium delivery device is connected. In this embodiment, the cooling medium is cooling water. Of course, in addition to cooling water, it can also be other cooling media, such as coolant or cooling air, etc. Then, the three cables are respectively connected to the external power line, and the opening and closing are controlled by the external control mechanism to complete the installation; When in use, the motor is started, three cables input three-phase electricity and transmit it to the coil assembly 3012 through the terminal 302. The coil assembly 3012 generates a magnetic field and interacts with the magnetic field of the magnet 202 to generate torque, thereby realizing the rotation of the rotor assembly. The coil assemblies 3012 between the multi-layer disc units are connected in parallel with each other through the three terminals 302, so that the torques between the multi-layer disc units are superimposed on each other and can provide sufficient torque and power to drive the load. External cooling water is input to the input port of the cooling water pipe 401 through the input channel 403 on the fixed shaft 1. The cooling water passes through the cooling water pipe 401 and meanders on the stator core 301 and exchanges heat with each other, thereby dissipating the heat generated by the stator core 301 in a timely manner and is discharged from the output port of the cooling water pipe 401 to the output channel 402 for discharge.

[0031] The above-mentioned ideal embodiments of the present invention are for inspiration. Through the above-mentioned description, relevant staff can make various changes and modifications without departing from the technical idea of ​​the present invention. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A disc-type multi-layer outer rotor motor, comprising a fixed shaft (1), characterized in that: It also comprises an outer rotor assembly (2) and an inner stator assembly (3), wherein the outer rotor assembly (2) is rotatably mounted on the fixed shaft (1), and the inner stator assembly (3) is fixedly mounted on the fixed shaft (1), and the inner stator assembly (3) is located between the outer rotor assembly (2) and the fixed shaft (1), and a plurality of disc-type units are formed between the outer rotor assembly (2) and the inner stator assembly (3), and the plurality of disc-type units are sequentially arranged along the axial direction of the fixed shaft (1), and a heat dissipation mechanism (4) is arranged on the inner stator assembly (3); The outer rotor assembly (2) in each layer of the disk-type unit comprises a rotor roller (201), the rotor roller (201) comprising a first body (2011) of an annular structure, flanges (212) protruding outwards are arranged on the outer circumference of both ends of the first body (2011), the flanges (212) at both ends of the first body (2011) are arranged axially along the fixed axis (1) and form an inwardly recessed placement groove (213) between the flanges (212) and the first body (2011), a plurality of magnetic steels (202) are arranged on the end surfaces of both ends of the first body (2011) along the axial direction of the fixed axis (1), and the plurality of magnetic steels (202) are arranged in the placement grooves (2013) and distributed along the circumference of the first body (2011); The inner stator assembly (3) in each layer of the disk-type unit comprises a stator core (301), the stator core (301) comprising two second bodies (3011) of annular structure, the two second bodies (3011) being respectively arranged in placement grooves (2013) at two ends of the first body (2011), the two second bodies (3011) being each provided with a coil assembly (3012) opposite to the magnetic steel (202), and the coil assemblies (3012) in the multiple layers of the disk-type units being connected in parallel with each other.

2. The disc-type multi-layer outer rotor motor according to claim 1, characterized in that: The inner stator assembly (3) further comprises two stator mounting plates (3013), the two stator mounting plates (3013) being arranged corresponding to the two second bodies (3011), the second bodies (3011) being fixed on the corresponding stator mounting plates (3013), the second bodies (3011) being located between the stator mounting plates (3013) and the magnetic steel (202), the stator mounting plates (3013) being arranged in the placement groove (2013) and having a gap, and the stator mounting plates (3013) on the multiple layers of the disc-type units are all mounted on the fixed shaft (1).

3. The disc-type multi-layer outer rotor motor according to claim 2, characterized in that: Each layer of the disc-type units is provided with a terminal post (302) fixed on a stator mounting plate (3013); the terminal post (302) located on one of the two stator mounting plates (3013) is a connecting male head (3021); the terminal post (302) located on the other of the two stator mounting plates (3013) is a connecting female head (3022); the coil assembly (3012) is correspondingly connected to the terminal post (302); the connecting female heads (3022) of the terminal posts (302) on the disc-type units of the previous layer on the disc-type units of the two adjacent layers are butted with the connecting male heads (3021) of the terminal posts (302) on the disc-type units of the next layer.

4. The disc-type multi-layer outer rotor motor according to claim 1, characterized in that: The heat dissipation mechanism (4) comprises a cooling water pipe (401) arranged on two stator cores (301) in each layer of the disc-type unit, one end of the cooling water pipe (401) is an input port, and the other end of the cooling water pipe (401) is an output port, an input channel (403) for inputting a cooling medium and an output channel (402) for outputting a cooling medium are arranged on the fixed shaft (1), the input port of the cooling water pipe (401) on each layer of the disc-type unit is in communication with the input channel (403), and the output port of the cooling water pipe (401) on each layer of the disc-type unit is in communication with the output channel (402).

5. The disc-type multi-layer outer rotor motor according to claim 4, characterized in that: The coil assembly (3012) is arranged at one end of the stator core (301) close to the magnetic steel (202), and the cooling water pipe (401) is arranged at one end of the stator core (301) away from the magnetic steel (202).

6. The disc-type multi-layer outer rotor motor according to claim 5, characterized in that: The cooling water pipe (401) is arranged in a meandering manner along the circumferential direction of the stator core (301).

7. The disc-type multi-layer outer rotor motor according to claim 1, characterized in that: The outer rotor assembly (2) further comprises an outer steel cylinder (203), and the rotor rollers (201) in each layer of the disc-type units are fixedly connected to the outer steel cylinder (203).

8. The disc-type multi-layer outer rotor motor according to claim 7, characterized in that: The rotor roller (201) and the outer steel cylinder (203) in each layer of the disc-type units are fixedly connected to each other via a key connection; a long groove is provided on the inner circumferential wall of the outer steel cylinder (203) along its axial direction; a first key groove is provided on the outer circumferential wall of the rotor roller (201) in each layer of the disc-type units; the first key groove and the long groove in each layer of the disc-type units are provided correspondingly; and a key is provided between the first key groove and the long groove in each layer of the disc-type units.

9. The disc-type multi-layer outer rotor motor according to claim 8, characterized in that: End covers (204) are fixedly mounted at both ends of the outer steel cylinder (203); the end covers (204) at both ends of the outer steel cylinder (203) are rotatably mounted on a fixed shaft (1); and a cavity (6) is formed between the fixed shaft (1), the outer steel cylinder (203) and the end covers (204) at both ends.

10. The disc-type multi-layer outer rotor motor according to claim 1, characterized in that: Both ends of the fixed shaft (1) are fixedly connected to fixed seats (5); the outer rotor assembly (2) and the inner stator assembly (3) are located between the fixed seats (5) at both ends; and the fixed seats (5) are used to fix the fixed shaft (1).

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