Motor module and multi-stage motor

Abstract

This invention discloses a motor module and a multi-stage motor. The motor module includes: a housing with first shaft holes on both sides, each housing housing containing a first bearing, and an adjusting ring on the housing; a stator assembly including a stator core and stator coils; a rotor assembly including a rotor frame, a rotor disk, and a permanent magnet, the rotor frame having a second shaft hole containing a second bearing; an electromagnetic clutch including an armature and a flange; and an output shaft. The rotor frame is mounted on the first bearing, the flange is fixedly mounted on the rotor frame, the output shaft is mounted on the second bearing, and the armature is mounted on the output shaft. This design facilitates motor maintenance and ensures that maintenance does not affect the normal operation of other motors, thus meeting the requirement of continuous operation.

Description

Technical Field

[0001] This invention relates to the field of motor technology, and in particular to a motor module and a multi-stage motor. Background Technology

[0002] Axial flux permanent magnet motors are widely used in electric vehicles, wind power generation, and aerospace due to their high power density and compact axial dimensions. In traditional axial flux motors, the rotor and output shaft are typically rigidly connected. However, during operation, multiple motors may coaxially output power. When one motor fails and requires repair, the entire series-connected multi-stage motor must be stopped, resulting in continuous operation interruption due to repairing a single motor. Therefore, designing a motor technology that facilitates maintenance while maintaining operational continuity is the technical problem this invention aims to solve. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to provide a motor module and a multi-stage motor, so as to facilitate motor maintenance and meet the requirement that the normal operation of other motors is not affected during the maintenance process, so as to meet the requirement of continuous operation.

[0004] The technical solution provided by this invention is a motor module, comprising: The housing has a first shaft hole on each of its two sides, a first bearing in the first shaft hole, and an adjusting ring on the housing, which is configured to adjust the position of the first bearing in the first shaft hole. A stator assembly, comprising a stator core and a stator coil, wherein the stator coil is disposed on the stator core; A rotor assembly, wherein the rotor includes a rotor frame, a rotor disk and a permanent magnet, the rotor disk is disposed on the rotor frame, the permanent magnet is disposed on the rotor disk, the rotor frame is provided with a second shaft hole, and a second bearing is disposed in the second shaft hole; An electromagnetic clutch, comprising an armature and a flange; Output shaft; The stator assembly, the rotor assembly, and the electromagnetic clutch are disposed in the housing, the stator core is fixedly disposed on the housing, the rotor frame is disposed on the first bearing, the flange is fixedly disposed on the rotor frame, the output shaft is disposed on the second bearing, and the armature is disposed on the output shaft.

[0005] Furthermore, the adjusting ring is fixedly mounted on the housing by screws, and the adjusting ring abuts against the outer side of the outer ring of the first bearing.

[0006] Furthermore, the outer casing includes two end plates and an annular surrounding plate, the annular surrounding plate being located between the two end plates, and the end plates being provided with the first shaft hole; The two end plates form a mounting cavity between the annular surrounding plate, and the stator assembly, rotor assembly and electromagnetic clutch are disposed in the mounting cavity; The adjusting ring is fixedly mounted on the corresponding end plate by screws.

[0007] Furthermore, each of the end plates is provided with a stator core, and each of the stator cores is provided with a stator coil; The permanent magnet is located between the stator coils on both sides.

[0008] Furthermore, the annular enclosure is provided with a plurality of measuring grooves, which are arranged on the outside of the rotor turntable.

[0009] Furthermore, the second shaft hole is provided with a plurality of second bearings arranged side by side.

[0010] Furthermore, a protruding annular positioning plate is provided on the outer peripheral wall of the output shaft, the annular positioning plate abuts against the inner side of the inner ring of the second bearing, and a fastening component is provided on the rotor frame, the fastening component abutting against the outer side of the outer ring of the second bearing.

[0011] Furthermore, the fastening component is a clamping ring, which is mounted on the side of the rotor frame by a plurality of screws, and the clamping ring abuts against the outer side of the outer ring of the second bearing.

[0012] Furthermore, a second annular protrusion is provided on the inner surface of the clamping ring, and the second annular protrusion abuts against the outer side of the outer ring of the second bearing.

[0013] Furthermore, the rotor frame is also provided with an opening slot, which is arranged on the outside of the permanent magnet.

[0014] An embodiment of this application also provides a multi-stage motor, which further includes the above-mentioned motor modules, wherein the output shafts of two adjacent motor modules are axially movable together via a coupling.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: The motor module and multi-stage motor provided by the present invention, by setting an electromagnetic clutch in the housing, with the armature of the electromagnetic clutch set on the output shaft and the flange of the electromagnetic clutch set on the rotor frame, in use, when power needs to be output through the motor module, the armature and flange in the electromagnetic clutch engage so that the rotor assembly provides power to the output shaft, and when maintenance is required, the armature and flange are separated. In this way, even if the output shaft is connected to the output shaft of other motor modules for power transmission, there is no need to stop the operation of other motor modules during maintenance, realizing convenient motor maintenance and meeting the requirement of not affecting the normal operation of other motors during maintenance, thus meeting the requirement of continuous operation.

[0016] More importantly, since the output shaft of the motor module is connected to other output shafts during maintenance, in order to facilitate the adjustment of the air gap between the permanent magnet and the stator assembly after maintenance, the rotor frame is mounted on the first bearing and the position of the first bearing in the first shaft hole is adjusted by adjusting the adjusting ring, thereby adjusting the position of the rotor frame to adjust the air gap between the permanent magnet armature and the stator assembly. After the maintenance operation is completed, the air gap can be adjusted online, reducing the difficulty of maintenance while meeting the requirements of continuous operation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is one of the structural schematic diagrams of the motor module of the present invention; Figure 2 This is the second schematic diagram of the structure of the motor module of the present invention; Figure 3 for Figure 2 Sectional view along line AA; Figure 4 for Figure 3 A magnified view of a portion of region B in the middle; Figure 5 for Figure 3 A magnified view of a portion of region C in the middle; Figure 6 This is an assembly diagram of the stator assembly and end plate in the motor module of the present invention; Figure 7 This is an assembly diagram of the rotor assembly, electromagnetic clutch, and output shaft in the motor module of the present invention.

[0019] Figure label: 1. Outer shell; 11. First shaft hole; 12. First bearing; 13. End plate; 14. Annular surrounding plate; 15. Adjusting ring; 16. Measuring groove; 151. First annular protrusion; 2. Stator assembly; 21. Stator core; 22. Stator coil; 3. Rotor assembly; 31. Rotor frame; 32. Rotor disc; 33. Permanent magnet; 34. Second bearing; 35. Fastening components; 36. Opening slot; 311, Second shaft hole; 351, Second annular protrusion; 4. Electromagnetic clutch; 41. Armature; 42. Flange; 5. Output shaft; 51. Annular positioning plate; 52. First locking nut; 53. Washer; 54. Second locking nut. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] like Figures 1-7 As shown, the motor module in this embodiment includes: The outer casing 1 has first shaft holes 11 on both sides, and a first bearing 12 is disposed in the first shaft holes 11. The outer casing 1 also has an adjusting ring 15, which is configured to adjust the position of the first bearing in the first shaft hole. Stator assembly 2, the stator assembly 2 includes stator core 21 and stator coil 22, the stator coil 22 being disposed on the stator core 21; The rotor assembly 3 includes a rotor frame 31, a rotor disk 32, and a permanent magnet 33. The rotor disk 32 is disposed on the rotor frame 31, and the permanent magnet 33 is disposed on the rotor disk 32. The rotor frame 31 is provided with a second shaft hole 311, and a second bearing 34 is disposed in the second shaft hole 311. Electromagnetic clutch 4, the electromagnetic clutch 4 including armature 41 and flange 42; Output shaft 5; The stator assembly 2, the rotor assembly 3, and the electromagnetic clutch 4 are disposed in the housing 1. The stator core 21 is fixedly disposed on the housing 1. The rotor frame 31 is disposed on the first bearing 12. The flange 42 is fixedly disposed on the rotor frame 31. The output shaft 5 is disposed on the second bearing 34. The armature 41 is fixedly disposed on the output shaft 5.

[0022] Specifically, the outer casing 1 has first shaft holes 11 on both sides to install first bearings 12, so as to meet the installation requirements of rotor frame 31 through the first bearings 12. The rotor frame 31 has second shaft holes 311 to install second bearings 34, and the output shaft 5 is assembled onto the second bearings 34.

[0023] The armature 41 on the output shaft 5 and the flange 42 on the rotor frame 31 can cooperate to achieve the clutch function. By adjusting the position of the first bearing 12 in the first shaft hole 11 through the adjusting ring 15, the relative position of the rotor frame 31 and the stator assembly 2 can be adjusted to adjust the air gap between the permanent magnet and the stator assembly.

[0024] In practical use, multiple motor modules are connected in series, with each output shaft 5 connected sequentially for power transmission. When one motor module malfunctions and requires maintenance, the armature 41 and flange 42 of the electromagnetic clutch 4 in the malfunctioning motor module separate, thus disconnecting the power transmission between the output shaft 5 and the rotor assembly 3. This allows operators to perform online maintenance on the stator assembly 2, rotor assembly 3, or other components of the malfunctioning motor module while the output shaft 5 continues to rotate with the other output shafts 5.

[0025] After the operator completes the maintenance operation online, the relative position between the rotor frame 31 and the stator assembly 2 may change, resulting in an excessively large or small air gap between them. At this time, the position of the first bearing 12 on both sides can be adjusted synchronously by adjusting the adjustment rings 15 on both sides to adjust the position of the rotor frame 31 in the axial direction, so as to accurately adjust the air gap between the permanent magnet 33 and the stator assembly 2, and ensure that the motor module can operate stably and reliably.

[0026] This allows for online repair of faulty motor modules, while also ensuring that the repaired motor modules can operate reliably.

[0027] Among them, the electromagnetic clutch 4 is a conventional clutch in the prior art. For example, a jaw clutch electromagnetic clutch 4 can be used, and there is no limitation here.

[0028] In one embodiment, in order to improve the installation reliability of the output shaft 5, the second shaft hole 311 is provided with a plurality of second bearings 34 arranged side by side.

[0029] Specifically, by setting multiple second bearings 34 in the second shaft hole 311, the output shaft 5 passes through the inner ring of the multiple second bearings 34 to ensure that the output shaft 5 is securely installed and can rotate smoothly.

[0030] In one embodiment, a protruding annular positioning plate 51 is provided on the outer peripheral wall of the output shaft 5. The annular positioning plate 51 abuts against the inner side of the inner ring of the second bearing 34. A fastening component 35 is provided on the rotor frame 31. The fastening component 35 abuts against the outer side of the outer ring of the second bearing 34.

[0031] Specifically, to ensure that the output shaft 5 can be securely installed on the second bearing 34, an annular positioning plate 51 is provided on the output shaft 5 to cooperate with the installation and fixation of the second bearing 34. After the output shaft 5 is inserted into the inner ring of the second bearing 34, the annular positioning plate 51 will abut against the inner side of the inner ring of the second bearing 34. The output shaft 5 is also threaded with a first locking nut 52, which is threaded onto the output shaft 5 and abuts against the outer side of the inner ring of the second bearing 34. In this way, the inner ring of the second bearing 34 can be clamped between the annular positioning plate 51 and the first locking nut 52, ensuring that the output shaft 5 and the second bearing 34 are securely assembled together.

[0032] To ensure that the second bearing 34 is reliably installed in the second shaft hole 311 provided in the rotor frame 31, such as Figure 4 As shown, the rotor frame 31 is provided with a fastening component 35 to press and position the outer ring of the second bearing 34 on the outside of the second bearing 34 through the fastening component 35, so as to ensure that the second bearing 34 is fixedly installed in the second shaft hole 311, thereby improving the reliability of assembly.

[0033] When multiple second bearings 34 are provided in the second shaft hole 311, a washer 53 is provided between the inner rings of two adjacent second bearings 34 for spacing.

[0034] The other end of the output shaft 5 is provided with a second locking nut 54. After the second locking nut 54 is tightened, it abuts against the armature 41 to fix the armature 41 in place.

[0035] In one embodiment, the fastening component 35 is a clamping ring, which is disposed on the side of the rotor frame 31 by a plurality of screws, and the clamping ring abuts against the outer side of the outer ring of the second bearing 34.

[0036] Specifically, the clamping ring is fixedly installed on the rotor frame 31 by multiple screws. The clamping ring will abut against the outer side of the outer ring of the second bearing 34, which will be located between the annular positioning plate 51 and the clamping ring.

[0037] Furthermore, a second annular protrusion 351 is provided on the inner surface of the clamping ring, and the second annular protrusion 351 abuts against the outer side of the outer ring of the second bearing 34.

[0038] Specifically, in order to apply balanced pressure to the second bearing 34, a second annular protrusion 351 is provided on the inner surface of the fastening member 35. The second annular protrusion 351 can abut against the outer side of the outer ring of the second bearing 34 to apply a smooth pressure to the second bearing 34.

[0039] In another embodiment of this application, the outer shell 1 includes two end plates 13 and an annular surrounding plate 14, the annular surrounding plate 14 being located between the two end plates 13, and the end plates 13 being provided with the first shaft hole 11; The two end plates 13 form a mounting cavity between the annular surrounding plate 14, and the stator assembly 2, rotor assembly 3 and electromagnetic clutch 4 are disposed in the mounting cavity.

[0040] Specifically, to facilitate the disassembly of the outer casing 1 for maintenance of internal components, the outer casing 1 includes two end plates 13 and an annular surrounding plate 14 disposed between the two end plates 13. The end plates 13 are fixedly connected to the annular surrounding plate 14 by screws or bolts. When maintenance is required, the corresponding end plate 13 can be opened to expose the internal components inside the outer casing 1, thereby facilitating maintenance operations.

[0041] Furthermore, in order to facilitate more precise adjustment of the air gap between the permanent magnet 33 and the stator assembly 2, the adjusting ring 15 is fixedly installed on the corresponding end plate 13 by screws, and the adjusting ring 15 is attached to the outer side of the outer ring of the first bearing 12.

[0042] Specifically, the rotor frame 31 is mounted on the inner ring of the first bearing 12 on both sides, and the end plate 13 presses and positions the outer ring of the first bearing 12 on the outside of the first bearing 12 through the adjusting ring 15. In actual use, after the maintenance operation is completed online and the assembly is finished, the position of the rotor frame 31 between the stator core 21 can be adjusted by loosening or tightening the adjusting ring 15 on both end plates 13, so as to achieve uniform and symmetrical air gap between the permanent magnet 33 and the stator assembly 2.

[0043] Preferably, the inner end face of the adjusting ring 15 is provided with a first annular protrusion 151. The first annular protrusion 151 abuts against the outer side of the outer ring of the first bearing 12. The first annular protrusion 151 can apply pressure to the outer ring of the first bearing 12 more evenly, which is more conducive to the precise adjustment of the position of the first bearing 12.

[0044] Furthermore, for ease of assembly, each end plate 13 is provided with a stator core 21, and each stator core 21 is provided with a stator coil 22; The permanent magnet 33 is located between the stator coils on both sides.

[0045] Specifically, stator cores 21 are respectively provided on the end plates 13 on both sides of the outer casing 1. The stator cores 21 can be fixedly installed on the end plates 13 on the corresponding sides. After the end plates 13 on both sides are fixedly installed on the annular surrounding plate 14, the permanent magnets 33 in the rotor assembly 3 will be located between the stator coils 22 on both sides. After the stator coils 22 on both sides are energized, they can generate sufficient electromagnetic force with the permanent magnets 33 to drive the rotor frame 31 to drive the output shaft 5 to rotate.

[0046] Furthermore, the outer casing 1 is also provided with a measuring groove 16, which is arranged on the outside of the rotor turntable 32.

[0047] Specifically, when assembling the rotor assembly 3 or repairing the stator assembly 2 in the early stage or later stage, if it is necessary to adjust the distance between the stator core 21 and the rotor turntable 32, in order to prevent collisions, an isolation pad (not shown) can be inserted from the measuring groove 16 into the housing 1 to separate the stator core 21 and the rotor turntable 32.

[0048] Specifically, after placing the isolation pad on the corresponding side of the rotor turntable 32, the end plate 13 on one side is then fixedly installed on the annular surrounding plate 14. At this time, due to the large magnetic force generated between the permanent magnet 33 on the rotor turntable 32 and the stator core 21, the rotor turntable 32 will be pressed against the stator core 21. Since the isolation pad is placed on the rotor turntable 32, the distance between the rotor turntable 32 and the stator core 21 can be limited in advance. After assembling one end plate 13, the other end plate 13 is then assembled onto the annular surrounding plate 14. At this time, the permanent magnet 33 will be located between the stator cores 21 on both sides. The two sides of the permanent magnet 33 and the stator cores 21 generate basically the same magnetic force, which allows for more precise adjustment of the position of the rotor frame 31 so that the permanent magnet 33 is arranged in the center between the two stator cores 21. This avoids the permanent magnet 33 from being completely attracted to the first-assembled stator core 21 during online maintenance, which would increase the difficulty of maintenance. It is also more conducive to avoiding collision damage caused by the force generated during the assembly of the permanent magnet 33 and the stator assembly 2.

[0049] Furthermore, after the complete assembly and maintenance operation, the isolation pad can be removed from the measuring slot 16, which is more conducive to online maintenance operations and ensures the convenience and reliability of maintenance operations.

[0050] In addition, an opening slot 36 is provided on the rotor frame 31, and the opening slot 36 is arranged on the outside of the permanent magnet 33.

[0051] Specifically, the open slot 36 can cut off the induced current path generated by the asynchronous stator and rotor magnetic fields or the harmonic magnetic field cutting the rotor disk, thereby effectively suppressing the rotor disk eddy current loss; in addition, the open slot 36 can also form a ventilation and heat dissipation channel, improve the heat dissipation capacity of the rotor disk, and improve the stability and efficiency of motor operation.

[0052] An embodiment of this application also provides a multi-stage motor, which further includes the above-mentioned motor modules, wherein the output shafts of two adjacent motor modules are axially movable together via a coupling.

[0053] Specifically, the output shafts of two adjacent motor modules can be connected by a coupling that allows movement in the axial direction. For example, a gear coupling can be used to meet the power transmission requirements of the output shaft while also meeting the requirements for adjusting the axial movement of the output shaft of the corresponding motor module during maintenance.

[0054] The motor module and multi-stage motor provided by this invention incorporate an electromagnetic clutch within the housing. The armature of the electromagnetic clutch is mounted on the output shaft, and the flange of the electromagnetic clutch is mounted on the rotor frame. During operation, when power needs to be output through the motor module, the armature and flange of the electromagnetic clutch engage to allow the rotor assembly to provide power to the output shaft. When maintenance is required, the armature and flange disengage. This allows the output shaft to be connected to the output shafts of other motor modules for power transmission without stopping the operation of other motor modules during maintenance. This facilitates motor maintenance and ensures that the normal operation of other motors is not affected during maintenance, thus meeting the requirement of continuous operation.

[0055] More importantly, since the output shaft of the motor module is connected to other output shafts during maintenance, in order to facilitate the adjustment of the air gap between the permanent magnet and the stator assembly after maintenance, the first bearing is mounted on the rotor frame and the position of the first bearing in the first shaft hole is adjusted by adjusting the adjusting ring, thereby adjusting the position of the rotor frame to adjust the air gap between the permanent magnet and the stator assembly. After the maintenance operation is completed, the air gap can be adjusted online, reducing the difficulty of maintenance while meeting the requirements of continuous operation.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A motor module, characterized in that, include: The housing has a first shaft hole on each of its two sides, a first bearing in the first shaft hole, and an adjusting ring on the housing, which is configured to adjust the position of the first bearing in the first shaft hole. A stator assembly, comprising a stator core and a stator coil, wherein the stator coil is disposed on the stator core; A rotor assembly, wherein the rotor includes a rotor frame, a rotor disk and a permanent magnet, the rotor disk is disposed on the rotor frame, the permanent magnet is disposed on the rotor disk, the rotor frame is provided with a second shaft hole, and a second bearing is disposed in the second shaft hole; An electromagnetic clutch, comprising an armature and a flange; Output shaft; The stator assembly, the rotor assembly, and the electromagnetic clutch are disposed in the housing, the stator core is fixedly disposed on the housing, the rotor frame is disposed on the first bearing, the flange is fixedly disposed on the rotor frame, the output shaft is disposed on the second bearing, and the armature is disposed on the output shaft.

2. The motor module according to claim 1, characterized in that, The adjusting ring is fixedly mounted on the housing by screws, and the adjusting ring is attached to the outer side of the outer ring of the first bearing.

3. The motor module according to claim 2, characterized in that, The outer casing includes two end plates and an annular surrounding plate, the annular surrounding plate being located between the two end plates, and the end plates being provided with the first shaft hole; The two end plates form a mounting cavity between the annular surrounding plate, and the stator assembly, rotor assembly and electromagnetic clutch are disposed in the mounting cavity; The adjusting ring is fixedly mounted on the corresponding end plate by screws.

4. The motor module according to claim 3, characterized in that, Each of the end plates is provided with a stator core, and each of the stator cores is provided with a stator coil; The permanent magnet is located between the stator coils on both sides.

5. The motor module according to claim 4, characterized in that, The annular enclosure is provided with multiple measuring slots, which are arranged on the outside of the rotor disc.

6. The motor module according to any one of claims 1-5, characterized in that, The second shaft hole is provided with a plurality of second bearings arranged side by side.

7. The motor module according to any one of claims 1-5, characterized in that, A protruding annular positioning plate is provided on the outer peripheral wall of the output shaft. The annular positioning plate abuts against the inner side of the inner ring of the second bearing. A fastening component is provided on the rotor frame. The fastening component abuts against the outer side of the outer ring of the second bearing.

8. The motor module according to claim 7, characterized in that, The fastening component is a clamping ring, which is set on the side of the rotor frame by multiple screws and abuts against the outer side of the outer ring of the second bearing.

9. The motor module according to claim 1, characterized in that, The rotor frame is also provided with an opening slot, which is arranged on the outside of the permanent magnet.

10. A multi-cascaded motor, characterized in that, It also includes multiple motor modules as described in any one of claims 1-9, wherein the output shafts of two adjacent motor modules are axially movable together via a coupling.

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