Motor

Abstract

The present invention relates to the technical field of motors. Disclosed is a motor, comprising: a housing; a stator, arranged inside the housing; and a rotor, arranged inside the housing by means of a bearing assembly and coaxially arranged with the stator, the rotor comprising a rotor disk assembly and a rotating shaft, and an air gap being formed between the rotor disk assembly and the stator. The motor further comprises an air gap adjusting structure. The bearing assembly is detachably connected to the housing, the air gap adjusting structure is arranged between the bearing assembly and the housing, and the air gap adjusting structure adjusts the axial positions of the bearing assembly, the rotating shaft and the rotor disk assembly so as to adjust the size of the air gap; and / or the rotor disk assembly is detachably connected to the rotating shaft, the air gap adjusting structure is arranged between the rotor disk assembly and the rotating shaft, and the air gap adjusting structure adjusts the axial position of the rotor disk assembly so as to adjust the size of the air gap. In the present invention, when the air gap is adjusted, the bearing assembly does not need to be dismounted and mounted, greatly simplifying the air gap adjusting process, and effectively avoiding the problem that the bearing assembly is damaged when the air gap adjusting structure is replaced.

Description

A type of motor Technical Field

[0001] This invention relates to the field of motor technology, and specifically to a motor. Background Technology

[0002] In axial flux motors, the air gap between the stator and rotor affects the motor's starting torque and its efficiency in cutting magnetic field lines during operation. Adjusting the air gap between the stator and rotor is an important maintenance task to ensure the motor's performance and efficiency.

[0003] Currently, the air gap between the stator and rotor is adjusted by replacing the air gap shims inside the bearing support. However, because the air gap shims are installed inside the bearing support, different air gap shims need to be replaced each time the air gap is adjusted. Replacing the air gap shims requires disassembling and reinstalling components such as the shaft and bearings, which is not only time-consuming and labor-intensive, but also causes damage to the bearings, bearing supports, shafts, and other components. Summary of the Invention

[0004] In view of this, the present invention provides an electric motor to solve the problem that the air gap adjustment between the stator and rotor causes damage to components such as bearings, bearing supports, and shafts.

[0005] This invention provides an electric motor, comprising:

[0006] case;

[0007] Stator, which is disposed inside the housing;

[0008] The rotor is disposed inside the housing via a bearing assembly and is coaxially arranged with the stator. The rotor includes a rotor disk assembly and a shaft, and there is an air gap between the rotor disk assembly and the stator.

[0009] The motor also includes an air gap adjustment structure;

[0010] The bearing assembly is separately connected to the housing, and the air gap adjustment structure is provided between the bearing assembly and the housing. The air gap adjustment structure adjusts the axial position of the bearing assembly, the rotating shaft and the rotor disk assembly to adjust the size of the air gap.

[0011] And / or, the rotor disk assembly is separately connected to the rotating shaft, and the air gap adjustment structure is provided between the rotor disk assembly and the rotating shaft. The air gap adjustment structure adjusts the axial position of the rotor disk assembly to adjust the size of the air gap.

[0012] The beneficial effects of the above-mentioned motor are as follows:

[0013] In the aforementioned motor, the air gap adjustment structure is not located inside the bearing assembly, but rather between the bearing assembly and the housing, and / or between the rotor disk assembly and the shaft. This allows for adjustment of the axial position of the rotor disk assembly. Therefore, adjusting the air gap does not require disassembly and reassembly of the bearing assembly, greatly simplifying the process and effectively avoiding damage to the bearing assembly when replacing the air gap adjustment structure.

[0014] Furthermore, since there is no need to disassemble the bearing assembly when adjusting the air gap, the adjustment of the air gap is faster and more convenient, and can be completed in a short time.

[0015] In one alternative embodiment, the bearing assembly includes:

[0016] The bearing mounting structure is separately disposed from the housing, and the bearing mounting structure has at least one bearing receiving cavity inside;

[0017] At least one bearing is disposed within the bearing housing cavity and is rotatably connected to the rotating shaft;

[0018] When the bearing assembly and the housing are provided with the air gap adjustment structure, the bearing mounting structure and the housing are provided with the air gap adjustment structure.

[0019] In one optional embodiment, the housing is provided with a through hole; the bearing mounting structure includes:

[0020] A bearing support, one end of which is located inside the housing, and the other end of which extends movably through a through hole in the housing;

[0021] A bearing cap is connected to the other end of the bearing support;

[0022] The air gap adjustment structure is provided between the bearing support and the housing, or the air gap adjustment structure is provided between the outer wall of the housing and the bearing cover.

[0023] In one optional embodiment, when the air gap adjustment structure is provided between the bearing support and the housing, a first protruding plate extends from the outer side wall of the bearing support, and the air gap adjustment structure is disposed between the housing and the first protruding plate. When the thickness of the air gap adjustment structure changes, the distance between the first protruding plate and the inner wall of the housing can be adjusted, thereby achieving precise control over minute changes in the air gap.

[0024] In one alternative embodiment, the air gap adjustment structure is detachably positioned between the inner wall of the housing and the first protruding plate via a first locking assembly.

[0025] The above technical solution features a first locking component that allows for quick disassembly and reinstallation of the air gap adjustment structure, facilitating rapid adjustment under different operating conditions. The first locking component ensures the air gap adjustment structure is firmly fixed in its adjusted position, preventing displacement during motor operation and thus guaranteeing the stability and accuracy of the air gap. Furthermore, by adjusting the tightness of the first locking component, minute changes in the air gap can be precisely controlled, improving adjustment accuracy.

[0026] In one optional embodiment, when the air gap adjustment structure is provided between the outer wall of the housing and the bearing cover, the outer diameter of the bearing cover is larger than the inner diameter of the through hole, and the air gap adjustment structure is disposed between the outer wall of the housing and the bearing cover.

[0027] The above technical solution features an air gap adjustment structure positioned between the outer wall of the housing and the bearing cover. This allows for external air gap adjustment without disassembling the motor housing, significantly simplifying the adjustment process. Furthermore, since opening the motor housing is unnecessary, air gap adjustment is more convenient. By replacing the air gap adjustment structure with one of different thicknesses, the distance between the outer wall of the housing and the bearing cover can be adjusted, achieving precise control of the air gap.

[0028] In one alternative embodiment, the air gap adjustment structure is detachably positioned between the outer wall of the housing and the bearing cover via a second locking assembly.

[0029] The above technical solution incorporates a second locking component that allows for quick disassembly and reinstallation of the air gap adjustment structure, facilitating rapid adjustment under various operating conditions. This second locking component ensures the air gap adjustment structure is firmly fixed in its adjusted position, preventing displacement during motor operation and thus guaranteeing the stability and accuracy of the air gap. Furthermore, adjusting the tightness of the second locking component allows for precise control of minute changes in the air gap, improving adjustment accuracy.

[0030] In one optional embodiment, when the air gap adjustment structure is provided between the rotor disk assembly and the rotating shaft, a groove is provided at one end of the rotor disk assembly near the bearing assembly, and a second protrusion is provided on the outer side wall of the rotating shaft, the second protrusion being accommodated in the groove.

[0031] In one alternative embodiment, the air gap adjustment structure is disposed between the second convex plate and the groove.

[0032] In one alternative embodiment, the air gap adjustment structure is detachably positioned between the second convex plate and the rotor disk assembly via a third locking component.

[0033] The aforementioned technical solution incorporates a third locking component, which allows for quick disassembly and reinstallation of the air gap adjustment structure, facilitating rapid adjustment under various operating conditions. This third locking component ensures the air gap adjustment structure is firmly fixed in its adjusted position, preventing displacement during motor operation and thus guaranteeing the stability and accuracy of the air gap. Furthermore, adjusting the tightness of the third locking component allows for precise control of minute changes in the air gap, improving adjustment accuracy.

[0034] In one optional embodiment, the air gap adjustment structure includes at least one air gap pad;

[0035] And / or, the housing includes a rotor end cover and a stator end cover, the stator and the bearing assembly are disposed on the stator end cover, the rotor end cover is connected to the stator end cover and surrounds the stator end cover to form a cavity structure, and the rotating shaft movably extends out from the rotor end cover. Attached Figure Description

[0036] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific 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 from these drawings without creative effort.

[0037] Figure 1 is a cross-sectional view of an electric motor provided in Embodiment 1 of the present invention;

[0038] Figure 2 is a cross-sectional view of an electric motor provided in Embodiment 1 of the present invention;

[0039] Figure 3 is a schematic diagram of the external structure of a motor provided in Embodiment 1 of the present invention;

[0040] Figure 4 is a cross-sectional view of an electric motor provided in Embodiment 2 of the present invention;

[0041] Figure 5 is a cross-sectional view of an electric motor provided in Embodiment 2 of the present invention;

[0042] Figure 6 is a schematic diagram of the external structure of a motor provided in Embodiment 2 of the present invention;

[0043] Figure 7 is a cross-sectional view of an electric motor provided in Embodiment 3 of the present invention;

[0044] Figure 8 is a cross-sectional view of a motor provided in Embodiment 3 of the present invention;

[0045] Figure 9 is a schematic diagram of the structure of a rotor disk body in an electric motor provided in Embodiment 3 of the present invention.

[0046] Explanation of reference numerals in the attached drawings: 1. Bearing assembly; 11. Bearing; 12. Bearing support; 13. Bearing cover; 14. First protruding plate; 2. Rotor; 21. Rotor disk assembly; 211. Rotor disk body; 212. Rotor core; 22. Shaft; 23. Second protruding plate; 24. Groove; 3. Stator; 4. Rotor end cover; 5. Stator end cover; 6. Air gap gasket; 7. First locking assembly; 8. Second locking assembly; 9. Third locking assembly; 10. Fourth locking assembly. Detailed Implementation

[0047] 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.

[0048] In axial flux motors, the air gap between the stator and rotor affects the motor's starting torque and its efficiency in cutting magnetic field lines during operation. Adjusting the air gap between the stator and rotor is an important maintenance task to ensure the motor's performance and efficiency.

[0049] Currently, the air gap between the stator and rotor is adjusted by replacing the air gap shims inside the bearing support. However, because the air gap shims are installed inside the bearing support, and more specifically, between the two bearings, a different air gap shim needs to be replaced each time the air gap is adjusted. When replacing the air gap shims, the shaft and bearing need to be pulled out of the bearing support, and after replacing the new air gap shims, the shaft and bearing need to be reinstalled into the bearing support. This is not only time-consuming and labor-intensive, but also causes damage to the bearings, bearing supports, shafts, and other components.

[0050] Based on this, the present invention provides a motor in which the air gap shim is removed from the bearing support and placed outside the bearing support. More specifically, the air gap shim is placed at the junction of the bearing support and the stator end cover, or at the junction of the rotor disk assembly and the shaft. Thus, when adjusting the air gap, it is not necessary to disassemble and reassemble the bearing, avoiding damage to the bearing, bearing support, shaft and other components when replacing the air gap shim.

[0051] The motor of this invention is an axial flux motor, which is very suitable for use in household and commercial settings, such as air conditioner fans, fan motors and blower motors, due to its high efficiency, compactness and low noise.

[0052] The motor of the present invention will be described in detail below with reference to Figures 1 to 9.

[0053] Example 1

[0054] This embodiment provides a motor, as shown in Figures 1 to 3, including a housing, a stator 3, a rotor 2, and an air gap adjustment structure. The housing provides accommodating space for the stator 3 and the rotor 2. The stator 3 is disposed inside the housing. The rotor 2 is disposed inside the housing via a bearing assembly 1 and is coaxially arranged with the stator 3. The rotor 2 includes a rotor disk assembly 21 and a shaft 22 connected between them, and an air gap exists between the rotor disk assembly 21 and the stator 3. More specifically, the rotor disk assembly 21 includes a rotor disk body 211 and a rotor core 212, and the stator 3 includes a stator core and windings, with the air gap between the rotor core 212 and the stator core. The bearing assembly 1 is separately disposed from the housing, and the air gap adjustment structure is disposed between the bearing assembly 1 and the housing. The air gap adjustment structure is used to adjust the axial position of the bearing assembly 1, the shaft 22, and the rotor disk assembly 21 to adjust the air gap.

[0055] In the aforementioned motor, the air gap adjustment structure is not located inside the bearing assembly 1, but rather between the bearing assembly 1 and the housing. The bearing assembly 1 and the housing can be separated. The axial position of the bearing assembly 1, the shaft 22, and the rotor disk assembly 21 can be directly adjusted through the air gap adjustment structure. Therefore, when adjusting the air gap, there is no need to disassemble the bearing assembly 1, which greatly simplifies the air gap adjustment process and effectively avoids the problem of damage to the bearing assembly 1 when replacing the air gap adjustment structure.

[0056] Furthermore, since there is no need to disassemble the bearing assembly 1 when adjusting the air gap, the adjustment of the air gap is faster and more convenient, and can be completed in a short time.

[0057] It should be noted that in this embodiment, the air gap adjustment structure is set at the junction of the bearing assembly 1 and the housing. The air gap adjustment structure can also be set at other positions between the bearing assembly 1 and the housing.

[0058] In some embodiments, the bearing assembly 1 includes a bearing mounting structure and a bearing 11. The bearing mounting structure has at least one bearing receiving cavity inside. At least one bearing 11 is provided, and the bearing 11 is disposed within the bearing receiving cavity, i.e., the outer ring of the bearing is embedded in the bearing receiving cavity. The bearing 11 is rotatably connected to a rotating shaft 22, i.e., the rotating shaft 22 is embedded in the inner ring of the bearing. When an air gap adjustment structure is provided between the bearing assembly 1 and the housing, an air gap adjustment structure is provided between the bearing mounting structure and the housing.

[0059] The housing has a through hole. The bearing mounting structure includes a bearing support 12 and a bearing cover 13. One end of the bearing support 12 is located inside the housing, and the other end of the bearing support 12 extends movably through the through hole in the housing. The bearing cover 13 is connected to the other end of the bearing support 12. An air gap adjustment structure is provided between the bearing support 12 and the housing.

[0060] In this embodiment, because the bearing support 12 is separately set from the housing, the bearing support 12 can be axially adjusted relative to the housing, thereby further realizing the adjustment of the air gap.

[0061] In some embodiments, a first protruding plate 14 extends from the outer side wall of the bearing support 12, and an air gap adjustment structure is disposed between the inner wall of the housing and the first protruding plate 14, providing an external air gap adjustment position on the bearing assembly 1, making air gap adjustment more convenient. When the thickness of the air gap adjustment structure changes, the distance between the first protruding plate 14 and the inner wall of the housing can be adjusted to achieve precise control of minute changes in the air gap.

[0062] Furthermore, since the size of the air gap adjustment structure in this embodiment is larger than the size arranged in the bearing support 12, the overall stability of the motor is further improved.

[0063] As an alternative embodiment, the first protruding plate 14 is disposed on the outer wall of the bearing support 12 located outside the housing, and the air gap adjustment structure can also be disposed between the outer wall of the housing and the first protruding plate 14. Even when the thickness of the air gap adjustment structure changes, precise control of minute changes in the air gap can still be achieved.

[0064] In some embodiments, the air gap adjustment structure is detachably positioned between the inner wall of the housing and the first protruding plate 14 via a first locking assembly 7. The first locking assembly 7 includes multiple screws. Multiple first connecting holes are circumferentially provided on the first protruding plate 14 and the stator end cover 5, respectively. The first protruding plate 14 and the stator end cover 5 are connected by multiple screws, which pass through the first connecting holes of the first protruding plate 14 and the first connecting holes of the stator end cover 5. In this embodiment, the design of the first locking assembly 7 allows the air gap adjustment structure to be quickly disassembled and reinstalled, facilitating rapid adjustment under different operating conditions. The first locking assembly 7 ensures that the air gap adjustment structure is firmly fixed in its adjusted position, preventing displacement during motor operation and thus ensuring the stability and accuracy of the air gap. Furthermore, by adjusting the tightness of the first locking assembly 7, precise control of minute changes in the air gap can be achieved, improving adjustment accuracy.

[0065] In some embodiments, the housing includes a rotor end cover 4 and a stator end cover 5. The bearing support 12 of the stator 3 and the bearing assembly 1 is disposed on the stator end cover 5. The rotor end cover 4 is connected to the stator end cover 5 and forms a cavity structure with the stator end cover 5, and the rotating shaft 22 extends movably through the rotor end cover 4.

[0066] In some embodiments, the air gap adjustment structure includes at least one air gap shim 6. Therefore, when adjusting the air gap, in addition to changing the specifications of the air gap shim 6, the number of air gap shims 6 can also be increased or decreased. In addition to adjusting the air gap between the rotor disk assembly 21 and the stator 3, the air gap shim 6 can also seal the junction between the first protrusion 14 and the inner wall of the housing, preventing external impurities from entering the interior of the motor housing.

[0067] The specific process of adjusting the air gap by the above-mentioned motor is as follows:

[0068] Turn off the motor power to ensure it is de-energized. If necessary, disassemble any external components, such as the housing.

[0069] Use a suitable tool (such as a screwdriver) to loosen the first locking assembly 7. Separate the bearing assembly 1 from the housing and remove the air gap adjustment structure.

[0070] Select a suitable air gap adjustment structure based on the required air gap size. Place the air gap adjustment structure back into the position on the inner wall of the housing, install the bearing assembly 1 onto the housing, and retighten the first locking assembly 7 to ensure that the air gap adjustment structure is firmly fixed between the inner wall of the housing and the first protruding plate 14.

[0071] Connect the power supply, start the motor, observe the motor's operating status, and confirm whether the air gap adjustment has achieved the expected effect.

[0072] Example 2

[0073] This embodiment provides a motor, as shown in Figures 4 to 6, including a housing, a stator 3, a rotor 2, and an air gap adjustment structure. The housing provides accommodating space for the stator 3 and the rotor 2. The stator 3 is disposed inside the housing. The rotor 2 is disposed inside the housing via a bearing assembly 1 and is coaxially arranged with the stator 3. The rotor 2 includes a rotor disk assembly 21 and a rotating shaft 22 connected between them, and an air gap exists between the rotor disk assembly 21 and the stator 3. More specifically, the rotor disk assembly 21 includes a rotor disk body 211 and a rotor core 212, and the stator 3 includes a stator core and windings. The air gap is located between the rotor core 212 and the stator core. The bearing assembly 1 is separately disposed from the housing, and the air gap adjustment structure is disposed between the bearing assembly 1 and the housing. The air gap adjustment structure is used to adjust the axial position of the bearing assembly 1, the rotating shaft 22, and the rotor disk assembly 21 to adjust the air gap.

[0074] The bearing assembly 1 includes a bearing mounting structure and a bearing 11. The bearing mounting structure has at least one bearing receiving cavity inside. At least one bearing 11 is provided, and the bearing 11 is disposed within the bearing receiving cavity, i.e., the outer ring of the bearing is embedded in the bearing receiving cavity. The bearing 11 is rotatably connected to a rotating shaft 22, i.e., the rotating shaft 22 is embedded in the inner ring of the bearing. When an air gap adjustment structure is provided between the bearing assembly 1 and the housing, an air gap adjustment structure is provided between the bearing mounting structure and the housing.

[0075] The difference between this embodiment and Embodiment 1 lies in the specific installation position of the air gap adjustment structure. More specifically, a through hole is provided on the housing. The bearing mounting structure includes a bearing support 12 and a bearing cover 13. One end of the bearing support 12 is located inside the housing, and the other end of the bearing support 12 extends movably through the through hole of the housing and is connected to the bearing cover 13. More specifically, the other end of the bearing support 12 and the bearing cover 13 are connected by a fourth locking assembly 10, which includes a plurality of screws circumferentially spaced between the bearing cover 13 and the bearing support 12. The outer diameter of the bearing cover 13 is larger than the inner diameter of the through hole. The air gap adjustment structure is disposed between the outer wall of the housing and the bearing cover 13.

[0076] In this embodiment, since the other end of the bearing support 12 moves through the through hole of the housing, the axial position between the bearing cover 13 and the housing will change after the air gap adjustment structure of different thickness is replaced. The bearing cover 13 is directly connected to the bearing support 12, so the axial position of the rotating shaft 22 and the rotor disk assembly 21 can be adjusted, thereby adjusting the air gap.

[0077] The air gap adjustment structure is located between the outer wall of the housing and the bearing cover 13, allowing for external air gap adjustment without disassembling the motor housing, greatly simplifying the adjustment process. Furthermore, since opening the motor housing is unnecessary, air gap adjustment is more convenient. By replacing the air gap adjustment structure with one of different thicknesses, the distance between the outer wall of the housing and the bearing cover 13 can be adjusted, achieving precise control of the air gap.

[0078] On the other hand, the outer diameter of the bearing cover 13 is larger than the inner diameter of the through hole, which is equivalent to increasing the outer diameter of the bearing cover 13. This can effectively prevent the bearing support 12 from falling out of the housing and ensure the stability and reliability of the bearing support 12.

[0079] In some embodiments, the air gap adjustment structure is detachably positioned between the outer wall of the housing and the bearing cover 13 via a second locking assembly 8. The second locking assembly 8 includes multiple screws. Multiple second connecting holes are circumferentially provided on both the bearing cover 13 and the stator end cover 5. The bearing cover 13 and the stator end cover 5 are connected by multiple screws, which pass through the second connecting holes of both the bearing cover 13 and the stator end cover 5. In this embodiment, the design of the second locking assembly 8 allows for quick disassembly and reinstallation of the air gap adjustment structure, facilitating rapid adjustment under different operating conditions. The second locking assembly 8 ensures that the air gap adjustment structure is firmly fixed in its adjusted position, preventing displacement during motor operation and thus guaranteeing the stability and accuracy of the air gap. Furthermore, by adjusting the tightness of the second locking assembly 8, precise control of minute changes in the air gap can be achieved, improving adjustment accuracy.

[0080] In some embodiments, the air gap adjustment structure includes at least one air gap shim 6. In addition to adjusting the air gap between the rotor disk assembly 21 and the stator 3, the air gap shim 6 can also seal the junction between the bearing cover 13 and the outer wall of the housing to prevent external impurities from entering the interior of the motor housing.

[0081] In some embodiments, the housing includes a rotor end cover 4 and a stator end cover 5. The bearing support 12 of the stator 3 and the bearing assembly 1 is disposed on the stator end cover 5. The rotor end cover 4 is connected to the stator end cover 5 and forms a cavity structure with the stator end cover 5, and the rotating shaft 22 extends movably through the rotor end cover 4.

[0082] The specific process of adjusting the air gap by the above-mentioned motor is as follows:

[0083] Turn off the motor power to ensure the motor is powered off.

[0084] Use appropriate tools (such as a screwdriver) to loosen the second locking assembly 8 and the fourth locking assembly 10. Remove the bearing cover 13 from the housing and bearing support 12, and remove the air gap adjustment structure.

[0085] Select a suitable air gap adjustment structure according to the required air gap size. Place the air gap adjustment structure at the junction of the outer wall of the housing and the bearing cover 13. Tighten the fourth locking assembly 10 to position the bearing cover 13 onto the bearing support 12; tighten the second locking assembly 8 to lock the bearing cover 13 and the air gap adjustment structure onto the housing.

[0086] Connect the power supply, start the motor, observe the motor's operating status, and confirm whether the air gap adjustment has achieved the expected effect.

[0087] Example 3

[0088] This embodiment provides a motor, as shown in Figures 7 to 9, including a housing, a stator 3, a rotor 2, and an air gap adjustment structure. The housing provides accommodating space for the stator 3 and the rotor 2. The stator 3 is disposed inside the housing. The rotor 2 is disposed inside the housing via a bearing assembly 1 and is coaxially arranged with the stator 3. The rotor 2 includes a rotor disk assembly 21 and a shaft 22 connected between them, and an air gap exists between the rotor disk assembly 21 and the stator 3. More specifically, the rotor disk assembly 21 includes a rotor disk body 211 and a rotor core 212, and the stator 3 includes a stator core and windings. The air gap is located between the rotor core 212 and the stator core. The air gap adjustment structure is disposed between the rotor disk assembly 21 and the shaft 22, and is used to adjust the axial position of the rotor disk assembly 21 to adjust the air gap.

[0089] The bearing assembly 1 includes a bearing support 12 and a bearing 11. The bearing support 12 is disposed inside the housing, and at least one bearing receiving cavity is provided inside the bearing support 12. In this embodiment, the bearing support 12 is separately disposed from the housing or integrally connected to the housing. At least one bearing 11 is provided, and the bearing 11 is disposed within the bearing receiving cavity, that is, the outer ring of the bearing is embedded in the bearing receiving cavity, and the bearing 11 is rotatably connected to the rotating shaft 22, that is, the rotating shaft 22 is embedded in the inner ring of the bearing.

[0090] The housing includes a rotor end cover 4 and a stator end cover 5. The bearing support 12 of the stator 3 and the bearing assembly 1 is disposed on the stator end cover 5. The rotor end cover 4 is connected to the stator end cover 5 and forms a cavity structure with the stator end cover 5, and the rotating shaft 22 moves out through the rotor end cover 4.

[0091] In some special cases, when the bearing support 12 and the stator end cover 5 cannot be separated, the above-mentioned motor structure can be used to adjust the air gap.

[0092] The difference between this embodiment and embodiments 1 and 2 lies in the specific installation position of the air gap adjustment structure. More specifically, in this embodiment, the rotor disk assembly 21 and the rotating shaft 22 are separately connected. A groove 24 is provided at one end of the rotor disk assembly 21 near the bearing assembly 1, and a second protruding plate 23 is provided on the outer wall of the rotating shaft 22, the second protruding plate 23 being accommodated within the groove 24. The air gap adjustment structure is disposed between the second protruding plate 23 and the groove 24.

[0093] In this embodiment, the rotating shaft 22 is positioned within the bearing assembly 1, and the axial position of the bearing assembly 1 remains unchanged, thus fixing the axial position of the rotating shaft 22. When the thickness of the air gap adjustment structure changes, the axial position of the rotor disk assembly 21 changes accordingly, thereby achieving air gap adjustment. In this embodiment, when replacing the air gap adjustment structure, only the rotor disk assembly 21 needs to be disassembled, which is very convenient and will not affect the bearing assembly 1.

[0094] In some embodiments, the air gap adjustment structure is detachably positioned between the second convex plate 23 and the rotor disk assembly 21 via a third locking assembly 9. The third locking assembly 9 includes multiple screws. Multiple third connecting holes are circumferentially provided on both the second convex plate 23 and the rotor disk body 211. The second convex plate 23 and the rotor disk body 211 are connected by multiple screws, which pass through the third connecting holes of both the second convex plate 23 and the rotor disk body 211. In this embodiment, the design of the third locking assembly 9 allows for quick disassembly and reinstallation of the air gap adjustment structure, facilitating rapid adjustment under different operating conditions. The third locking assembly 9 ensures that the air gap adjustment structure is firmly fixed in its adjusted position, preventing displacement during motor operation and thus guaranteeing the stability and accuracy of the air gap. Furthermore, by adjusting the tightness of the third locking assembly 9, precise control of minute changes in the air gap can be achieved, improving adjustment accuracy.

[0095] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and all such modifications and variations fall within the scope defined by the appended claims.

Claims

1. An electric motor, comprising: case; Stator (3), said stator (3) is disposed inside the housing; The rotor (2) is disposed inside the housing via a bearing assembly (1) and coaxially disposed with the stator (3). The rotor (2) includes a rotor disk assembly (21) and a rotating shaft (22). There is an air gap between the rotor disk assembly (21) and the stator (3). The motor is characterized in that it further includes an air gap adjustment structure; The bearing assembly (1) is separately connected to the housing. An air gap adjustment structure is provided between the bearing assembly (1) and the housing. The air gap adjustment structure adjusts the axial position of the bearing assembly (1), the rotating shaft (22) and the rotor disk assembly (21) to adjust the size of the air gap. And / or, the rotor disk assembly (21) is separately connected to the rotating shaft (22), and the air gap adjustment structure is provided between the rotor disk assembly (21) and the rotating shaft (22). The air gap adjustment structure adjusts the axial position of the rotor disk assembly (21) to adjust the size of the air gap.

2. The motor according to claim 1, characterized in that, The bearing assembly (1) includes: The bearing mounting structure is separately disposed from the housing, and the bearing mounting structure has at least one bearing receiving cavity inside; At least one bearing (11) is disposed in the bearing receiving cavity and is rotatably connected to the rotating shaft (22); When the bearing assembly (1) and the housing are provided with the air gap adjustment structure, the bearing mounting structure and the housing are provided with the air gap adjustment structure.

3. The motor according to claim 2, characterized in that, The housing is provided with a through hole; the bearing mounting structure includes: A bearing support (12) is provided, one end of which is located inside the housing, and the other end of which extends through a through hole in the housing. The bearing cap (13) is connected to the other end of the bearing support (12); The air gap adjustment structure is provided between the bearing support (12) and the housing, or the air gap adjustment structure is provided between the outer wall of the housing and the bearing cover (13).

4. The motor according to claim 3, characterized in that, When the air gap adjustment structure is provided between the bearing support (12) and the housing, a first protruding plate (14) extends from the outer side wall of the bearing support (12), and the air gap adjustment structure is provided between the housing and the first protruding plate (14).

5. The motor according to claim 4, characterized in that, The air gap adjustment structure is detachably positioned between the inner wall of the housing and the first protruding plate (14) via the first locking assembly (7).

6. The motor according to claim 3, characterized in that, When the air gap adjustment structure is provided between the outer wall of the housing and the bearing cover (13), the outer diameter of the bearing cover (13) is larger than the inner diameter of the through hole, and the air gap adjustment structure is provided between the outer wall of the housing and the bearing cover (13).

7. The electric machine of claim 6, wherein, The air gap adjustment structure is detachably positioned between the outer wall of the housing and the bearing cover (13) via the second locking assembly (8).

8. The motor according to claim 1, characterized in that, When the air gap adjustment structure is provided between the rotor disk assembly (21) and the rotating shaft (22), a groove (24) is provided at one end of the rotor disk assembly (21) near the bearing assembly (1), a second protruding plate (23) is provided on the outer side wall of the rotating shaft (22), the second protruding plate (23) is accommodated in the groove (24), and the air gap adjustment structure is provided between the second protruding plate (23) and the groove (24).

9. The electric machine of claim 8, wherein, The air gap adjustment structure is detachably positioned between the second convex plate (23) and the rotor disk assembly (21) via the third locking component (9).

10. The electric machine of any of claims 1-9, wherein, The air gap adjustment structure includes at least one air gap pad (6); And / or, the housing includes a rotor end cover (4) and a stator end cover (5), the stator (3) and the bearing assembly (1) are disposed on the stator end cover (5), the rotor end cover (4) is connected to the stator end cover (5) and forms a cavity structure with the stator end cover (5), and the rotating shaft (22) extends movably through the rotor end cover (4).

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