Permanent magnet motor with dustproof structure

Abstract

The invention discloses a permanent magnet motor with a dustproof structure, and relates to the technical field of permanent magnet motors, the permanent magnet motor comprises a housing, the housing is internally provided with a cleaning assembly, a detection assembly, a stator assembly and a rotor assembly, the rotor assembly is located in the housing, the rotor assembly sleeves the stator assembly, one side of the housing is provided with a ventilation opening, a cleaning assembly is arranged in the ventilation opening, and a detection assembly is arranged in the cleaning assembly; the cleaning assembly comprises a baffle, a connecting block, a movable block and an electrostatic column, the baffle is located in the ventilation opening, the connecting block is located on the side, close to the ventilation opening, of the baffle, a first hollow cavity is formed in the side, away from the baffle, of the connecting block, and the movable block is located in the first hollow cavity and slidably connected with the connecting block; a second hollow cavity is formed in the side, away from the baffle, of the movable block, and an electrostatic column is arranged in the second hollow cavity.

Description

Technical Field

[0001] This invention relates to the field of permanent magnet motor technology, specifically a permanent magnet motor with a dustproof structure. Background Technology

[0002] Permanent magnet motors, with their advantages of high efficiency, high power density, and wide speed range, have been widely used in various fields such as industrial drives, new energy equipment, and smart home appliances. In actual operation, the core components such as the stator and rotor assemblies inside the motor will continuously generate heat due to electromagnetic induction and mechanical friction. If the heat cannot be dissipated in time, the temperature inside the casing will rise, which will lead to problems such as a decrease in the insulation performance of the stator windings, a decrease in the magnetic flux of the permanent magnet, and an increase in the rotational resistance of the rotor, seriously affecting the motor's operating efficiency and service life.

[0003] Currently, the mainstream heat dissipation method for permanent magnet motors in the industry is air cooling. This heat dissipation structure has significant defects: when external air enters the casing, it carries impurities such as dust, sand, and fibers. These impurities accumulate at the ventilation openings, gradually blocking the ventilation channels, resulting in reduced airflow and a significant decrease in heat dissipation efficiency. On the other hand, some small impurities will enter the casing with the airflow and adhere to key components such as the stator core, the surface of the permanent magnet, and the rotor bearings. Over time, this accumulation will not only further hinder heat conduction but may also exacerbate bearing wear, increase the risk of short circuits in the stator windings, and significantly shorten the motor's maintenance cycle and overall service life. Summary of the Invention

[0004] The purpose of this invention is to provide a permanent magnet motor with a dustproof structure to solve the problems mentioned in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: A permanent magnet motor with a dustproof structure includes a housing, a cleaning component, a detection component, a stator assembly, and a rotor assembly inside the housing. The rotor assembly is located inside the housing and is sleeved on the stator assembly. A ventilation opening is provided on one side of the housing, and a cleaning component is provided inside the ventilation opening. The detection component is provided inside the cleaning component. The cleaning component includes a baffle, a connecting block, a movable block, and an electrostatic column. The baffle is located inside the vent, the connecting block is located on the side of the baffle close to the vent, and a first hollow cavity is formed on the side of the connecting block away from the baffle. The movable block is located inside the first hollow cavity and is slidably connected to the connecting block. A second hollow cavity is formed on the side of the movable block away from the baffle, and an electrostatic column is provided inside the second hollow cavity.

[0006] Furthermore, during operation, the temperature in localized areas of a permanent magnet motor can rise, affecting its efficiency. This necessitates cooling of internal components, typically using air or water cooling. Air cooling requires external airflow, but this airflow can carry dust into the motor. Over prolonged operation, dust accumulates not only at the air inlet but also inside the casing, further impacting overall cooling efficiency. The existing casing structure is used to protect the internal components. A cleaning component controls the size of the ventilation opening based on the motor's operating temperature and removes dust from the flowing air. A detection component measures the movement distance of the moving blocks, and the stator assembly is used to generate rotation from the input electrical energy. A magnetic field controls the rotation of the rotor assembly, which outputs mechanical energy under the influence of the magnetic field. A vent is provided on the side of the housing away from the motor output end, and a baffle is located inside the vent. A connecting block is located on the side of the baffle close to the vent, in the center of the baffle. A first hollow cavity is provided on the side of the connecting block away from the baffle, and a movable block is located inside the first hollow cavity. A second hollow cavity is provided on the side of the movable block away from the connecting block, and an electrostatic column is provided inside the second hollow cavity. The electrostatic column is electrically connected to an external power source. When energized, it provides a sufficiently high potential difference to power the movement of charges, allowing electrostatic energy to be stored on the surface of the column. The electrostatic column generates static electricity when energized, attracting nearby dust.

[0007] The cleaning assembly also includes a cover plate and a dust removal plate. The surface of the baffle plate is provided with a connecting post. One end of the connecting post is fixedly connected to the inner wall of the vent, and the other end of the connecting post is fixedly connected to the baffle plate. The side of the movable block away from the baffle plate is provided with a cover plate. The dust removal plate is located in the second hollow cavity and is sleeved on the electrostatic post. A fixing post is provided between the dust removal plate and the connecting block. One end of the fixing post is fixedly connected to the dust removal plate, and the other end of the fixing post is fixedly connected to the outer wall of the connecting block.

[0008] Furthermore, the baffle is connected to the vent via a connecting column, fixing the baffle inside the vent. A cover plate then covers the vent, blocking it when the motor is not operating to prevent dust accumulation. A dust-cleaning plate, fitted onto the electrostatic column, cleans dust adhering to it and moves it outside the cover plate to prevent dust from falling into the casing. The dust-cleaning plate and connecting block are fixed together via a fixing column. When the motor is running, the cover plate separates from the vent opening, enlarging it and increasing airflow, thus improving cooling efficiency. As the cover plate moves outward, the distance between the movable block and the connecting block changes, and the movable block also moves outward. During this process, the dust-cleaning plate moves along the electrostatic column towards the connecting column, increasing the exposed portion of the electrostatic column and further improving dust removal efficiency. This achieves improved dust removal efficiency as airflow increases.

[0009] The first hollow cavity is filled with nitrogen gas.

[0010] Furthermore, when the motor is working, the temperature it generates affects the connecting block. The connecting block absorbs heat, which in turn affects the internal nitrogen gas. The filled air expands when heated, pushing the movable block outward. The movement of the movable block causes the electrostatic column and the cover plate to move, thereby increasing the motor temperature, expanding the vent opening size, increasing the airflow, and improving the cooling efficiency. When the motor stops working, or when the body temperature decreases, the expansion of the nitrogen gas will decrease, which will cause the movable block to retract.

[0011] The cover is circular, and its diameter is the same as that of the vent.

[0012] Furthermore, when the permanent magnet motor is not in operation, the cover plate cooperates with the vent to completely close the vent. When the permanent magnet motor is idle, dust will not enter the housing through the vent, improving the cleanliness of the permanent magnet motor when idle. When the permanent magnet motor is in operation, heat radiation will be generated inside the housing. After working for a period of time, the heat will radiate to the connecting block. The nitrogen gas inside the connecting block will be affected by the high temperature and begin to expand, pushing the movable block outward. The cover plate will detach from the vent. At this time, outside air will enter the housing through the gap between the cover plate and the vent, and the exposed part of the electrostatic column will also increase, which is suitable for permanent magnet motors that operate for short periods of time.

[0013] The detection assembly includes a first capacitor plate and a second capacitor plate, which are located in a first hollow cavity. The first capacitor plate is fixedly connected to the bottom of the second hollow cavity. The second capacitor plate is located on the outer wall of the movable block and is fixedly connected to the movable block. The first capacitor plate and the second capacitor plate are on the same central axis.

[0014] Furthermore, the detection component is located within the first hollow cavity and is used to detect the offset distance of the movable block, indirectly determining the air expansion amplitude. The first capacitor plate is fixed to the bottom of the inner wall of the first hollow cavity, serving as a basic reference point, while the second capacitor plate is fastened to the side of the movable block close to the connecting block. Since one end of the movable block is within the first hollow cavity, the second capacitor plate is also located within the first hollow cavity. When the permanent magnet motor is working, it generates heat radiation, affecting the nitrogen gas within the first hollow cavity. The nitrogen gas expands due to heat, generating a thrust on the movable block, causing it to move and thus moving the second capacitor plate. The distance between the second and first capacitor plates changes. The higher the operating temperature of the permanent magnet motor, the greater the expansion amplitude of the nitrogen gas, and the greater the distance between the second and first capacitor plates, meaning the smaller the capacitance between the two capacitor plates. Conversely, the closer the operating temperature of the permanent magnet motor is to a constant value, the smaller the expansion amplitude of the nitrogen gas, and the smaller the distance between the second and first capacitor plates, meaning the larger the capacitance between the two capacitor plates. This indirectly determines the temperature change of the permanent magnet motor.

[0015] The stator assembly includes a stator core and a stator winding. The stator core is fixed inside the housing, and the stator winding is located inside the stator core.

[0016] Furthermore, the stator core is used for the efficient passage of magnetic fields, forming a strong and concentrated magnetic field inside the motor, which provides the basis for the generation of electromagnetic force. The stator windings are used to generate a magnetic field after current is applied, driving the rotor to rotate.

[0017] The rotor assembly includes a permanent magnet, a bearing, and a fan. The permanent magnet is located inside the stator core and is sleeved on the bearing. One end of the bearing passes through the housing, and the other end of the bearing is equipped with a fan. The fan is fixedly connected to the bearing and is located on the side of the baffle close to the stator core.

[0018] Furthermore, the permanent magnet is used to provide a constant magnetic field. During use, the magnetic field is provided through the stator winding, which drives the bearing to rotate. The end of the bearing away from the vent is the output end of the permanent magnet motor, which extends outward through the housing. The other end of the bearing is inside the housing and is fixedly connected to the fan. Thus, when the motor is working, the rotation of the bearing drives the fan to rotate.

[0019] As another further implementation method: When the permanent magnet motor is working, heat radiation is generated inside the housing. At the same time, the rotation of the bearing drives the fan to rotate, and the fan drives the airflow. Under the influence of the fan, the outside air flows into the housing through the gap between the square cover and the vent. After prolonged or high-intensity operation, the temperature inside the casing will increase, and the heat will radiate to the connecting block. The nitrogen gas inside the connecting block will expand due to the high temperature, pushing the moving block outward. The cover plate will detach from the vent, and the gap between the two will widen. At this time, the flow rate of external air through the cover plate and the vent will increase, and the exposed part of the electrostatic column will also increase, thus improving the dust removal efficiency. When the permanent magnet motor is not working or is working at low intensity, the temperature generated by its casing is insufficient to drive the moving block to make a large displacement. However, the traction force generated by the fan can still drive the external air to flow through the gap between the square cover plate and the vent, achieving a cooling effect. This is suitable for the permanent magnet motor to work for a long time. The outer ring and the square cover plate are on the same horizontal plane. When the moving block is not moving, the square cover plate and the vent plate are on the same central axis point. Then, the large particle filter screen is an existing structure used to prevent small stones or particles from entering the casing.

[0020] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention forms a three-level dustproof system through a cover plate, an electrostatic column, and a large-particle filter. When the motor is idle, the square cover plate fits precisely with the ventilation opening, completely blocking external dust from entering. When working, the large-particle filter on the outer ring of the square cover plate can intercept stones and coarse particles, preventing them from scratching internal components. After the electrostatic column is energized, it generates an electrostatic field, which efficiently adsorbs fine dust in the airflow, preventing impurities from adhering to the surface of the stator core and permanent magnet, thus reducing dust damage to the motor from the source.

[0021] 2. In this invention, the dust removal plate is fixed relative to the connecting block through the fixed column. When the motor temperature rises and the movable block drives the electrostatic column to move outward, the dust removal plate slides in the opposite direction along the electrostatic column, so that the exposed area of ​​the electrostatic column increases synchronously with the increase of the ventilation opening. This achieves dynamic adaptation that the higher the air flow, the larger the dust removal area, avoiding dust accumulation and blockage of the ventilation channel. At the same time, it prevents dust from falling into the machine casing after the electrostatic column is saturated, thus maintaining a clean environment inside the motor for a long time.

[0022] 3. In this invention, the nitrogen gas filling the first hollow cavity of the connecting block realizes a temperature displacement response mechanism. When the motor generates heat, the nitrogen gas expands due to heat, pushing the movable block outward and causing the cover plate to separate from the vent. The increased gap increases the air intake. When the motor stops or the temperature drops, the air contracts, causing the movable block to retract and the cover plate to automatically reduce the ventilation gap. This process requires no additional power and achieves adaptive adjustment where the higher the temperature, the stronger the heat dissipation capacity. This avoids the problems of energy waste at low temperatures and insufficient heat dissipation at high temperatures caused by the fixed air intake of traditional air-cooled structures. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a specific embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a specific embodiment two of the present invention; Figure 3 This is a schematic diagram of the stator assembly of the present invention; Figure 4 This is a schematic diagram of the cover plate of the present invention; Figure 5 This is a schematic diagram of the structure of the active block of the present invention; Figure 6 For the present invention Figure 3 Enlarged view of part A in the middle section; Figure 7 For the present invention Figure 5 Enlarged schematic diagram of section B in the middle.

[0024] In the diagram: 1. Housing; 11. Ventilation opening; 2. Cleaning assembly; 21. Baffle; 22. Connecting block; 221. First hollow cavity; 23. Movable block; 231. Second hollow cavity; 24. Static column; 25. Cover plate; 26. Dust removal plate; 27. Connecting column; 28. Fixing column; 29. ​​Outer ring; 3. Detection assembly; 31. First capacitor plate; 32. Second capacitor plate; 4. Stator assembly; 41. Stator core; 42. Stator winding; 5. Rotor assembly; 51. Permanent magnet; 52. Bearing; 53. Fan. Detailed Implementation

[0025] 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, and 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. Specific implementation method one: like Figures 1-7 As shown, the present invention provides a permanent magnet motor with a dustproof structure, including a permanent magnet motor with a dustproof structure. The permanent magnet motor includes a housing 1, and a cleaning component 2, a detection component 3, a stator component 4 and a rotor component 5 are provided inside the housing 1. The rotor component 5 is located inside the housing 1 and is sleeved on the stator component 4. A ventilation opening 11 is provided on one side of the housing 1, and a cleaning component 2 is provided inside the ventilation opening 11. The detection component 3 is provided inside the cleaning component 2. The cleaning component 2 includes a baffle 21, a connecting block 22, a movable block 23, and an electrostatic column 24. The baffle 21 is located inside the vent 11. The connecting block 22 is located on the side of the baffle 21 close to the vent 11. A first hollow cavity 221 is formed on the side of the connecting block 22 away from the baffle 21. The movable block 23 is located inside the first hollow cavity 221 and is slidably connected to the connecting block 22. A second hollow cavity 231 is formed on the side of the movable block 23 away from the baffle 21. An electrostatic column 24 is provided inside the second hollow cavity 231.

[0027] Furthermore, during operation, the temperature in some areas of the permanent magnet motor may rise, affecting its working efficiency. This necessitates cooling of internal components, typically using air cooling or water cooling. Air cooling requires external airflow, but this airflow can carry dust into the motor. Over prolonged operation, dust accumulates not only at the air inlet but also inside the housing 1, affecting overall cooling efficiency. The housing 1 is an existing structure designed to protect internal components. The cleaning component 2 controls the opening size of the ventilation vent 11 based on the motor's operating temperature and cleans dust from the flowing air. The detection component 3 detects the movement distance of the moving block 23. The stator assembly 4 uses input electrical energy to generate a rotating magnetic field to control the rotation of the rotor assembly 5. The rotor assembly 5 is subjected to this magnetic field. The mechanical energy output is affected by the following: a vent 11 is provided on the side of the housing 1 away from the motor output end, a baffle 21 is located inside the vent 11, a connecting block 22 is located on the side of the baffle 21 close to the vent 11, the connecting block 22 is located in the middle of the baffle 21, a first hollow cavity 221 is provided on the side of the connecting block 22 away from the baffle 21, a movable block 23 is located inside the first hollow cavity 221, and a second hollow cavity 231 is provided on the side of the movable block 23 away from the connecting block 22. An electrostatic column 24 is provided inside the second hollow cavity 231. The electrostatic column 24 is electrically connected to an external power source. When energized, it provides a sufficiently high potential difference to provide power for charge movement, so that electrostatic energy is stored on the surface of the column, realizing the generation of static electricity by the electrostatic column 24, which adsorbs nearby dust.

[0028] like Figure 1 , Figures 4-7 As shown, the cleaning assembly 2 also includes a cover plate 25 and a dust removal plate 26. A connecting post 27 is provided on the surface of the baffle 21. One end of the connecting post 27 is fixedly connected to the inner wall of the vent 11, and the other end of the connecting post 27 is fixedly connected to the baffle 21. The movable block 23 is provided with a cover plate 25 on the side away from the baffle 21. The dust removal plate 26 is located in the second hollow cavity 231. The dust removal plate 26 is sleeved on the electrostatic post 24. A fixing post 28 is provided between the dust removal plate 26 and the connecting block 22. One end of the fixing post 28 is fixedly connected to the dust removal plate 26, and the other end of the fixing post 28 is fixedly connected to the outer wall of the connecting block 22.

[0029] Furthermore, the baffle 21 is connected to the vent 11 via the connecting post 27, fixing the baffle 21 inside the vent 11. Then, the cover plate 25 covers the vent 11, blocking it when the motor is not operating to prevent dust accumulation. The dust cleaning plate 26 is fitted onto the electrostatic post 24 to clean dust adhering to the post 24 and is pushed outside the cover plate 25 to prevent dust from falling into the housing 1. The dust cleaning plate 26 and the connecting block 22 are fixed relative to each other via the fixing post 28. When the motor is operating... The cover plate 25 will separate from the opening of the vent 11, making the opening of the vent 11 larger, increasing the air flow and improving the cooling efficiency. As the cover plate 25 moves outward from the vent 11, the distance between the movable block 23 and the connecting block 22 will also change, and the movable block 23 will also move outward from the vent 11. During this process, the dust removal plate 26 moves along the electrostatic column 24 to the side closer to the connecting column 27, increasing the exposed part of the electrostatic column 24, thereby improving the dust removal efficiency. As the air flow increases, the dust removal efficiency will also increase.

[0030] like Figure 4 , Figure 5 As shown, the first hollow cavity 221 is filled with nitrogen gas.

[0031] Furthermore, when the motor is working, the temperature generated will affect the connecting block 22. The connecting block 22 absorbs heat, which in turn affects the internal nitrogen. The filled air expands when heated, pushing the movable block 23 to move outward. The movement of the movable block 23 drives the electrostatic column 24 and the cover plate 25 to move, thereby increasing the motor temperature, expanding the opening size of the vent 11, increasing the air flow, and improving the cooling efficiency. When the motor stops working, or when the body temperature decreases, the expansion of the nitrogen will decrease, which will cause the movable block 23 to retract.

[0032] like Figure 2 As shown, the cover plate 25 is circular, and the diameter of the cover plate 25 is the same as that of the vent 11.

[0033] Furthermore, when the permanent magnet motor is not working, the cover plate 25 cooperates with the vent 11 to completely close the vent 11. When the permanent magnet motor is idle, dust will not enter the housing 1 through the vent 11, improving the cleanliness of the permanent magnet motor when it is idle. When the permanent magnet motor is working, heat radiation will be generated inside the housing 1. After working for a period of time, the heat will be radiated to the connecting block 22. The nitrogen gas inside the connecting block 22 will be affected by the high temperature and begin to expand, pushing the movable block 23 to move outward. The cover plate 25 will detach from the vent 11. At this time, the outside air will enter the housing 1 through the gap between the cover plate 25 and the vent 11, and the exposed part of the electrostatic column 24 will also increase, which is suitable for the permanent magnet motor that operates for a short period of time.

[0034] like Figure 7As shown, the detection component 3 includes a first capacitor plate 31 and a second capacitor plate 32. The first capacitor plate 31 and the second capacitor plate 32 are located inside the first hollow cavity 221. The first capacitor plate 31 is fixedly connected to the bottom of the interior of the second hollow cavity 231. The second capacitor plate 32 is located on the outer wall of the movable block 23 and is fixedly connected to the movable block 23. The first capacitor plate 31 and the second capacitor plate 32 are on the same central axis.

[0035] Furthermore, its detection component 3 is located inside the first hollow cavity 221, used to detect the offset distance of the movable block 23, indirectly determining the air expansion amplitude. The first capacitor plate 31 is fixed to the bottom of the inner wall of the first hollow cavity 221, serving as a basic reference point, while the second capacitor plate 32 is fastened to the side of the movable block 23 close to the connecting block 22. Since one end of the movable block 23 is inside the first hollow cavity 221, the second capacitor plate 32 is also inside the first hollow cavity 221. When the permanent magnet motor is working, heat radiation is generated inside, affecting the nitrogen gas inside the first hollow cavity 221. The nitrogen gas expands due to heat, affecting... The movable block 23 generates thrust, causing it to move and move the second capacitor plate 32. The distance between the second capacitor plate 32 and the first capacitor plate 31 changes. When the operating temperature of the permanent magnet motor is higher, the expansion amplitude of nitrogen is greater, and the distance between the second capacitor plate 32 and the first capacitor plate 31 is greater, that is, the capacitance between the two capacitor plates is smaller. Conversely, when the operating temperature of the permanent magnet motor is closer to the constant value, the expansion amplitude of nitrogen is smaller, and the distance between the second capacitor plate 32 and the first capacitor plate 31 is smaller, that is, the capacitance between the two capacitor plates is larger, thus indirectly judging the temperature change of the permanent magnet motor.

[0036] like Figure 3 As shown, the stator assembly 4 includes a stator core 41 and a stator winding 42. The stator core 41 is fastened inside the housing 1, and the stator winding 42 is located inside the stator core 41.

[0037] Furthermore, the stator core 41 is used for efficient magnetic field passage, so that a strong and concentrated magnetic field is formed inside the motor, providing a basis for the generation of electromagnetic force. The stator winding 42 is used to generate a magnetic field after current is passed through it, driving the rotor to rotate.

[0038] like Figure 3 As shown, the rotor assembly 5 includes a permanent magnet 51, a bearing 52 and a fan 53. The permanent magnet 51 is located inside the stator core 41 and is sleeved on the bearing 52. One end of the bearing 52 passes through the housing 1, and the other end of the bearing 52 is provided with a fan 53. The fan 53 is fixedly connected to the bearing 52 and is located on the side of the baffle 21 close to the stator core 41.

[0039] Furthermore, the permanent magnet 51 is used to provide a constant magnetic field. During use, the magnetic field is provided by the stator winding 42, which drives the bearing 52 to rotate. The end of the bearing 52 away from the vent 11 is the output end of the permanent magnet motor, which extends outward through the housing 1. The other end of the bearing 52 is inside the housing 1 and is fixedly connected to the fan 53. Thus, when the motor is working, the rotation of the bearing 52 drives the fan 53 to rotate. Specific Implementation Method Two: The only difference between this embodiment and Embodiment 1 is the shape of the cover plate 25. The shape of the cover plate 25 is not limited; it can be square or circular as in Embodiment 1. The specific difference is: like Figure 1 As shown, when the permanent magnet motor is working, heat radiation will be generated inside the housing 1. At the same time, the bearing 52 rotates and drives the fan 53 to rotate. The fan 53 drives the air flow. Under the traction of the fan 53, the external air flows into the housing 1 through the gap between the square cover plate 25 and the vent 11. After prolonged or high-intensity operation, the temperature inside the casing 1 will increase, and the heat will radiate to the connecting block 22. The nitrogen gas inside the connecting block 22 will expand due to the high temperature, pushing the movable block 23 outward. The cover plate 25 will detach from the vent 11, and the gap between the two will widen. At this time, the flow rate of external air through the cover plate 25 and the vent 11 will increase, and the exposed part of the electrostatic column 24 will also increase, thus improving the dust removal efficiency. like Figure 4 , Figure 5 As shown, when the permanent magnet motor is not working or is working at low intensity, the temperature generated by its housing 1 is insufficient to drive the movable block 23 to produce a large displacement. However, the traction force generated by the fan 53 can still drive the external air to flow through the gap between the square cover plate 25 and the vent 11, thereby achieving a cooling effect and adapting to the long-term operation of the permanent magnet motor. The outer ring 29 and the square cover plate 25 are on the same horizontal plane, which is used to keep the square cover plate 25 and the vent 11 on the same central axis point when the movable block 23 is not moving. Then, the large particle filter screen is an existing structure used to prevent small stones or particles from entering the housing 1.

[0041] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A permanent magnet motor with a dustproof structure, the permanent magnet motor comprising a housing (1), characterized in that: The housing (1) is provided with a cleaning component (2), a detection component (3), a stator component (4) and a rotor component (5). The rotor component (5) is located inside the housing (1) and is sleeved on the stator component (4). A ventilation opening (11) is provided on one side of the housing (1). The cleaning component (2) is provided inside the ventilation opening (11), and the detection component (3) is provided inside the cleaning component (2). The cleaning component (2) includes a baffle (21), a connecting block (22), a movable block (23), and an electrostatic column (24). The baffle (21) is located inside the vent (11). The connecting block (22) is located on the side of the baffle (21) close to the vent (11). A first hollow cavity (221) is provided on the side of the connecting block (22) away from the baffle (21). The movable block (23) is located inside the first hollow cavity (221). The movable block (23) is slidably connected to the connecting block (22). A second hollow cavity (231) is provided on the side of the movable block (23) away from the baffle (21). An electrostatic column (24) is provided inside the second hollow cavity (231).

2. A permanent magnet motor with a dustproof structure according to claim 1, characterized in that: The cleaning assembly (2) also includes a cover plate (25) and a dust removal plate (26). The surface of the baffle (21) is provided with a connecting column (27). One end of the connecting column (27) is fixedly connected to the inner wall of the vent (11), and the other end of the connecting column (27) is fixedly connected to the baffle (21). The movable block (23) is provided with a cover plate (25) on the side away from the baffle (21). The dust removal plate (26) is located in the second hollow cavity (231). The dust removal plate (26) is sleeved on the electrostatic column (24). A fixing column (28) is provided between the dust removal plate (26) and the connecting block (22). One end of the fixing column (28) is fixedly connected to the dust removal plate (26), and the other end of the fixing column (28) is fixedly connected to the outer wall of the connecting block (22).

3. A permanent magnet motor with a dustproof structure according to claim 2, characterized in that: The first hollow cavity (221) is filled with nitrogen gas.

4. A permanent magnet motor with a dustproof structure according to claim 2, characterized in that: The cover plate (25) is circular, and the diameter of the cover plate (25) is the same as that of the vent (11).

5. A permanent magnet motor with a dustproof structure according to claim 2, characterized in that: The cover plate (25) is square, and an outer ring (29) is fitted on the cover plate (25). A large particle filter screen is provided between the outer ring (29) and the cover plate (25).

6. A permanent magnet motor with a dustproof structure according to any one of claims 1 to 5, characterized in that: The detection component (3) includes a first capacitor plate (31) and a second capacitor plate (32). The first capacitor plate (31) and the second capacitor plate (32) are located inside the first hollow cavity (221). The first capacitor plate (31) is fixedly connected to the bottom of the interior of the second hollow cavity (231). The second capacitor plate (32) is located on the outer wall of the movable block (23). The second capacitor plate (32) is fixedly connected to the movable block (23). The first capacitor plate (31) and the second capacitor plate (32) are on the same central axis.

7. A permanent magnet motor with a dustproof structure according to any one of claims 1 to 5, characterized in that: The stator assembly (4) includes a stator core (41) and a stator winding (42). The stator core (41) is fastened inside the housing (1), and the stator winding (42) is located inside the stator core (41).

8. A permanent magnet motor with a dustproof structure according to any one of claims 7, characterized in that: The rotor assembly (5) includes a permanent magnet (51), a bearing (52) and a fan (53). The permanent magnet (51) is located inside the stator core (41). The permanent magnet (51) is sleeved on the bearing (52). One end of the bearing (52) passes through the housing (1). The other end of the bearing (52) is provided with a fan (53). The fan (53) is fixedly connected to the bearing (52). The fan (53) is located on the side of the baffle (21) close to the stator core (41).

Images