Dust collector motor

Abstract

The application discloses a dust collector motor, relates to the technical field of motor manufacturing, and comprises a shell and a stator assembly connected with the shell, wherein a rotor is arranged in the stator assembly; the stator assembly comprises a plurality of split iron cores and connecting pieces connected with the split iron cores; the rotor comprises a rotating shaft and a bonded magnetic ring connected with the circumferential side wall of the rotating shaft and corresponding to the stator assembly; the diameter of the bonded magnetic ring is between 12±2 mm; the overall iron core formed by the split iron cores has an outer diameter between 37±3 mm and an inner diameter between 13±2 mm; and the overall iron core has 3 slots or 6 slots. More coil turns can be arranged, the saturation degree of the iron core is improved, the coil slot filling rate in the stator assembly is improved, the performance of the motor formed by the bonded magnetic ring reaches the performance standard of the motor formed by sintered magnetic rings, the motor with sintered magnetic rings containing heavy rare earth elements is replaced, and the cost is reduced.

Description

Technical Field

[0001] This application relates to the field of motor manufacturing technology, and in particular to vacuum cleaner motors. Background Technology

[0002] Vacuum cleaners, as commonly used equipment in both household and commercial cleaning, rely primarily on the performance of their core component, the motor, for their suction efficiency and operational stability. The motor converts energy through electromagnetic induction, driving the impeller to rotate and generate airflow, thus achieving the suction function. Traditional brushless vacuum cleaner motors are designed using sintered neodymium iron boron (NdFeB) as the permanent magnet material. To address the high-temperature resistance and demagnetization resistance of sintered NdFeB, heavy rare earth elements such as dysprosium and terbium are added. Motors based on sintered NdFeB magnets exhibit excellent performance due to their high energy product, high remanence, and coercivity. Regarding the aforementioned technologies, the inventors believe that the sintered magnetic rings in existing vacuum cleaner motors contain heavy rare earth elements, and the purification and smelting technologies for heavy rare earth elements are complex, expensive, and costly. Utility Model Content

[0003] The purpose of this application is to provide a vacuum cleaner motor that improves the problem of existing vacuum cleaner motors containing heavy rare earth elements in sintered magnetic rings, which are complex, expensive, and costly to purify and smelt.

[0004] The vacuum cleaner motor provided in this application adopts the following technical solution: A vacuum cleaner motor includes a housing and a stator assembly connected to the housing. The stator assembly contains a rotor. The stator assembly includes several interconnected segmented iron cores and connecting parts disposed on the side of the segmented iron cores away from the housing. The rotor includes a rotating shaft rotatably connected to the housing and an adhesive magnetic ring connected to the circumferential sidewall of the rotating shaft and corresponding to the stator assembly. The diameter of the adhesive magnetic ring is between 12±2mm. The outer diameter of the integral iron core composed of the segmented iron cores is between 37±3mm, the inner diameter is between 13±2mm, and the number of slots in the integral iron core is 3 or 6. Alternatively, the diameter of the adhesive magnetic ring may be between 8±2mm, and the outer diameter of the integral iron core composed of the segmented iron core may be between 30±3mm and the inner diameter may be between 9±2mm. The integral iron core may have 3 or 6 slots. The circumferential sidewall of the adhesive magnetic ring may be provided with a protective magnetic sleeve that cooperates with the adhesive magnetic ring.

[0005] By adopting the above technical solution, the adhesive magnetic ring in the rotor is made by hot-pressing magnetic powder and adhesive. After winding on individual segmented iron cores, the segmented iron cores are connected to form a whole iron core, which is then connected to the connecting parts. This improves the fill factor of the coil slots in the stator assembly. The adhesive magnetic ring replaces the sintered magnetic ring. The diameter of the adhesive magnetic ring is between 12±2mm. The outer diameter of the whole iron core composed of segmented iron cores is between 37±3mm, and the inner diameter is between 13±2mm. The whole iron core has 3 or 6 slots. Alternatively, the diameter of the adhesive magnetic ring can be between 8±2mm. Between 30±3mm and 9±2mm, the outer diameter of the integral iron core composed of segmented iron cores is between 30±3mm and 9±2mm, so that more coil turns can be placed, improving the saturation of the iron core. The protective sleeve wraps around the circumferential sidewall of the bonded magnetic ring to prevent the bonded magnetic ring from breaking or falling off due to centrifugal force or external impact during high-speed rotation, protecting the structural integrity of the bonded magnetic ring, extending the service life of the bonded magnetic ring, so that the performance of motors composed of bonded magnetic rings can reach the performance standards of motors composed of sintered magnetic rings, and replacing motors containing sintered magnetic rings containing heavy rare earth elements can reduce costs.

[0006] Optionally, a control plate is provided on the side of the connector away from the segmented iron core, an end cover is provided on the side of the control plate away from the stator assembly, a fan shroud is provided on the end of the housing away from the stator assembly, and a moving impeller connected to a rotating shaft is rotatably disposed in the fan shroud.

[0007] By adopting the above technical solutions, the control board can accurately regulate the motor's speed, direction and other operating parameters to achieve intelligent operation of the motor. The end cover seals and protects the control board, preventing it from being damaged by the external environment. The fan shroud at the end of the casing provides installation space for the impeller. The impeller is connected to the rotating shaft and generates a strong airflow when rotating, providing suction power for the vacuum cleaner. The fan shroud can also guide the airflow direction and improve the suction effect.

[0008] Optionally, the connector has a plurality of mounting blocks spaced apart on the side facing the control board. Each mounting block has a support rod that passes through the control board and connects to the end cover. Each mounting block also has a connection terminal that is electrically connected to the control board.

[0009] By adopting the above technical solution, the support rod passes through the control board and connects to the end cover, firmly fixing the control board between the connector and the end cover, preventing the control board from shifting or shaking due to vibration or other factors during motor operation; the connecting terminal is electrically connected to the control board, simplifying the electrical connection process between the control board and the stator assembly and improving assembly efficiency.

[0010] Optionally, the housing is provided with a fixed seat corresponding to the stator assembly, the rotating shaft is rotatably connected to the fixed seat, the side wall of the segmented iron core is provided with a fixed groove along its axial direction, and the fixed seat is provided with a fixed rod inserted into the fixed groove.

[0011] By adopting the above technical solution, the fixing groove of the segmented iron core cooperates with the fixing rod of the fixing seat to position the stator assembly and prevent the stator assembly from shifting or shaking when the motor is running at high speed.

[0012] Optionally, a plurality of fixed blades are arranged around the housing and the fixed base, and a stationary impeller corresponding to the fixed blades is arranged between the housing and the moving impeller. The stationary impeller is connected to the fixed base, and the airflow channels between the moving impeller, the stationary impeller and the fixed blades are connected.

[0013] By adopting the above technical solution, the fixed blades between the casing and the fixed base form a stable airflow guiding structure. The airflow channels of the moving impeller, stationary impeller and fixed blades are connected to form a multi-stage airflow boosting structure, which improves the suction pressure and airflow, and enhances the cleaning ability. At the same time, the high-speed flow of air in the channel can remove the heat generated by the motor operation, achieve efficient heat dissipation, avoid performance degradation due to overheating, and improve the continuous working ability of the motor.

[0014] Optionally, the fixed base is provided with a hollowed-out connecting cavity that communicates with the airflow channel of the stationary impeller, and the connecting cavity is connected to the slot after the segmented iron core is assembled.

[0015] By adopting the above technical solution, the connecting cavity of the fixed seat connects the airflow channel of the stationary impeller with the slot after the segmented iron core is assembled, guiding the high-speed airflow through the iron core slot of the stator assembly, and using the airflow to directly cool the stator assembly, improving the heat dissipation efficiency of the stator assembly, avoiding the decrease in magnetic properties of the iron core due to long-term high temperature, ensuring the stable operation of the motor under high load, and extending its service life.

[0016] Optionally, the inner wall of the communicating cavity is provided with a plurality of support plates that are connected to the fixed seat at intervals.

[0017] By adopting the above technical solution, the support plate inside the connecting cavity can prevent the fixed seat from deforming due to excessive force without obstructing airflow. Optionally, the rotating shaft is provided with a bearing assembly in the fixed seat, the bearing assembly including bearings spaced apart and elastic elements disposed between the bearings.

[0018] By adopting the above technical solution, the bearings spaced apart in the bearing assembly support the rotating shaft and reduce shaft wobbling; the elastic elements between the bearings apply preload to the bearings to prevent them from getting too close to each other in the fixed seat and absorb axial impact and vibration during motor operation.

[0019] In summary, this application includes at least one of the following beneficial technical effects: 1. Replace sintered magnetic rings with bonded magnetic rings. The diameter of the bonded magnetic rings is between 12±2mm, and the outer diameter of the integral iron core composed of segmented iron cores is between 37±3mm and the inner diameter is between 13±2mm. The integral iron core has 3 or 6 slots to accommodate more coil turns, improve the saturation of the iron core, and enable the performance of motors composed of bonded magnetic rings to reach the performance standards of motors composed of sintered magnetic rings. This replaces motors containing sintered magnetic rings with heavy rare earth elements, reducing costs. 2. The support rod passes through the control board and connects to the end cover, firmly fixing the control board between the connector and the end cover, preventing the control board from shifting or shaking due to vibration or other factors during motor operation; the connecting terminal is electrically connected to the control board, simplifying the electrical connection process between the control board and the stator assembly and improving assembly efficiency; 3. The fixed blades between the casing and the fixed base form a stable airflow guiding structure. The airflow channels of the moving impeller, stationary impeller and fixed blades are connected to form a multi-stage airflow boosting structure, which improves the suction pressure and airflow, and enhances the cleaning ability. At the same time, the high-speed flow of air in the channel can remove the heat generated by the motor operation, achieve efficient heat dissipation, avoid performance degradation due to overheating, and improve the continuous working ability of the motor. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall motor of a vacuum cleaner; Figure 2 This is a partial cross-sectional view of a vacuum cleaner motor.

[0021] In the diagram, 1. Casing; 11. Mounting base; 12. Mounting rod; 13. Mounting blade; 14. Connecting cavity; 15. Support plate; 2. Stator assembly; 21. Split iron core; 211. Mounting groove; 22. Connecting piece; 23. Mounting block; 24. Support rod; 25. Connecting terminal; 3. Rotor; 31. Rotating shaft; 32. Adhesive magnetic ring; 33. Magnetic sleeve; 4. Control board; 5. End cover; 6. Fan cover; 61. Moving impeller; 7. Stationary impeller; 8. Bearing assembly; 81. Bearing; 82. Elastic element. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1 - Appendix Figure 2 This application will be described in further detail below.

[0023] Vacuum cleaner motor, see reference Figure 1 and Figure 2The stator assembly 2 includes a housing 1 and a stator assembly 2 connected to the housing 1. The stator assembly 2 contains a rotor 3. The stator assembly 2 includes several interconnected segmented iron cores 21 and a connector 22 disposed on the side of the segmented iron cores 21 away from the housing 1. The rotor 3 includes a rotating shaft 31 rotatably connected to the housing 1 and an adhesive magnetic ring 32 engaged and fixed to the circumferential side wall of the rotating shaft 31. The adhesive magnetic ring 32 has 1 pair of poles (2 poles) or 2 pairs of poles (4 poles). The adhesive magnetic ring 32 corresponds to the stator assembly 2. The adhesive magnetic ring 32 in the rotor 3 is made by uniformly mixing magnetic powder and PA66 adhesive, bonding them together, and then hot pressing them in a mold. After winding on the individual segmented iron cores 21, the segmented iron cores 21 are connected to form an iron core assembly and connected to the connector 22 to improve the coil slot fill factor in the stator assembly 2. In this embodiment, the diameter of the bonded magnetic ring 32 is between 12±2mm, the outer diameter of the integral core composed of the segmented iron core 21 is between 37±3mm, the inner diameter is between 13±2mm, and the number of slots in the integral core is 3 or 6, so as to accommodate more coil turns, improve the core saturation, and improve the coil slot fill factor in the stator assembly 2. Alternatively, the outer diameter of the integral core composed of the segmented iron core 21 can be designed to be between 30±3mm, the inner diameter to be between 9±2mm, the number of slots to be 3 or 6, and the diameter of the bonded magnetic ring 32 to be between 8±2mm. This also allows the performance of the bonded magnetic ring motor to reach the performance standard of the sintered magnetic ring motor containing heavy rare earth elements.

[0024] Reference Figure 1 A control board 4 is installed on the side of the connector 22 away from the split iron core 21. Several electronic components are installed on the control board 4. An end cover 5 is installed on the side of the control board 4 away from the stator assembly 2. Several mounting blocks 23 are spaced apart on the side of the connector 22 facing the control board 4. The mounting blocks 23 are integrally formed with the connector 22 and are made of plastic. An integrally formed support rod 24 is provided on the mounting block 23. The support rod 24 passes through the control board 4 and is fixed to the end cover 5 by bolts. A connection terminal 25 that is electrically connected to the coil in the stator assembly 2 is installed in the mounting block 23. The connection terminal 25 passes through the control board 4 and is electrically connected to it, which simplifies the electrical connection process between the control board 4 and the stator assembly 2 and improves assembly efficiency.

[0025] Reference Figure 1 and Figure 2The circumferential sidewall of the adhesive magnetic ring 32 is provided with a protective magnetic sleeve 33 that cooperates with the adhesive magnetic ring 32. The protective magnetic sleeve 33 is made of non-magnetic stainless steel. The protective magnetic sleeve 33 covers the circumferential sidewall of the adhesive magnetic ring 32 to prevent the adhesive magnetic ring 32 from breaking or falling off due to centrifugal force or external impact during high-speed rotation. The housing 1 is provided with a fixed seat 11 corresponding to the stator assembly 2. The rotating shaft 31 is rotatably connected to the fixed seat 11. The outer sidewall of the segmented iron core 21 is provided with a fixed seat along its axial direction. The fixed slot 211 has a fixed rod 12 threadedly connected to the fixed base 11, which is inserted into the fixed slot 211 to position the segmented iron core 21; the fan cover 6 is installed at the end of the housing 1 away from the stator assembly 2, and a moving impeller 61 is rotatably arranged in the fan cover 6 and fixedly connected to one end of the rotating shaft 31. The adhesive magnetic ring 32 on the rotating shaft 31 causes the rotating shaft 31 to rotate through the principle of electromagnetic induction, so that the moving impeller 61 can generate a strong airflow when rotating, providing suction power for the vacuum cleaner.

[0026] Reference Figure 2 A number of fixed blades 13 are installed at intervals around the housing 1 and the fixed base 11. A stationary impeller 7 corresponding to the fixed blades 13 is provided between the housing 1 and the moving impeller 61. The stationary impeller 7 is fixed to the side of the fixed base 11 away from the stator assembly 2 by bolts. The airflow channels between the moving impeller 61, the stationary impeller 7 and the fixed blades 13 are connected. A connecting cavity 14 communicating with the airflow channel of the stationary impeller 7 is hollowed out in the fixed base 11. The connecting cavity 14 is connected to the slot after the segmented iron core 21 is assembled. The high-speed flow of air in the channel can carry away the motor's operating power. The heat is efficiently dissipated; several support plates 15 connected to the fixed seat 11 are welded around the inner wall of the connecting cavity 14 at intervals to prevent deformation of the fixed seat 11; a bearing assembly 8 is installed in the fixed seat 11 on the rotating shaft 31. The bearing assembly 8 includes bearings 81 arranged at intervals to support the rotating shaft 31 and reduce shaft wobbling of the rotating shaft 31. An elastic element 82 corresponding to the rotating shaft 31 is installed between the bearings 81. The elastic element 82 is a spring that applies a preload to the bearings 81 to prevent the bearings 81 from getting close to each other in the fixed seat 11.

[0027] The implementation principle of this application embodiment is as follows: When the vacuum cleaner is powered on, the current is transmitted through the control board 4 to the connection terminal 25 on the mounting block 23, and then to the stator assembly 2. The segmented iron core 21 and the coil in the stator assembly 2 generate an alternating magnetic field under the action of the current, which interacts with the adhesive magnetic ring 32 on the rotor 3, causing the adhesive magnetic ring 32 to drive the rotating shaft 31 of the rotor 3 to rotate. The rotating shaft 31 drives the connected moving impeller 61 to rotate in the fan cover 6. When the moving impeller 61 rotates, it causes the airflow to generate centrifugal force, forming a high-speed airflow in the airflow channel. When the high-speed airflow flows through the slot after the connecting cavity 14 and the segmented iron core 21 are combined, it can cool the stator assembly 2 and the rotor 3 and other components, ensuring the normal operating temperature of the motor. The adhesive magnetic ring 32 in rotor 3 is made by hot pressing magnetic powder and adhesive together. The adhesive magnetic ring 32 is protected by magnetic sleeve 33. After winding on individual segmented iron cores 21, the segmented iron cores 21 are connected to form an iron core assembly and connected to connector 22. This improves the fill factor of the coil slots in stator assembly 2, so that the performance of the motor composed of adhesive magnetic ring 32 reaches the performance standard of the motor composed of sintered magnetic ring. This replaces the motor containing sintered magnetic rings containing heavy rare earth elements, reducing costs.

[0028] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A dust extractor motor, characterized by: The application relates to a motor, which comprises a casing (1) and a stator assembly (2) connected to the casing (1), wherein a rotor (3) is arranged in the stator assembly (2), the stator assembly (2) comprises a plurality of connected segment cores (21) and connecting pieces (22) arranged on the side of the segment cores (21) away from the casing (1), the rotor (3) comprises a rotating shaft (31) rotatably connected to the casing (1) and a bonded magnetic ring (32) connected to the circumferential side wall of the rotating shaft (31) and corresponding to the stator assembly (2), one of the diameters of the bonded magnetic ring (32) is between 12+ / -2 mm, the overall core formed by the segment cores (21) has an outer diameter of between 37+ / -3 mm and an inner diameter of between 13+ / -2 mm, and the overall core has 3 or 6 slots. Alternatively, the other diameter of the bonded magnetic ring (32) is between 8+ / -2 mm, the other outer diameter of the overall core formed by the segment cores (21) is between 30+ / -3 mm, the inner diameter is between 9+ / -2 mm, and the overall core has 3 or 6 slots, and a magnetic shield sleeve (33) corresponding to the bonded magnetic ring (32) is arranged on the circumferential side wall of the bonded magnetic ring (32).

2. The dust cup according to claim 1, wherein: The side of the connecting piece (22) away from the segment core (21) is provided with a control panel (4), the side of the control panel (4) away from the stator assembly (2) is provided with an end cover (5), one end of the casing (1) away from the stator assembly (2) is provided with a fan cover (6), and the fan cover (6) is rotatably provided with a moving vane (61) connected to the rotating shaft (31).

3. The dust cup according to claim 2, wherein: The side of the connecting piece (22) towards the control panel (4) is provided with a plurality of mounting blocks (23) at intervals, the mounting blocks (23) are provided with support rods (24) connected to the end cover (5) through the control panel (4), and the mounting blocks (23) are provided with connecting terminals (25) electrically connected to the control panel (4).

4. The dust cup according to claim 3, wherein: The casing (1) is provided with a fixing seat (11) corresponding to the stator assembly (2), the rotating shaft (31) is rotatably connected to the fixing seat (11), and a fixing groove (211) is formed in the side wall of the segment core (21) along the axial direction, and the fixing seat (11) is provided with a fixing rod (12) inserted into the fixing groove (211).

5. The dust cup according to claim 4, wherein: A plurality of fixing vanes (13) are arranged around the casing (1) and the fixing seat (11), the casing (1) and the moving vane (61) are provided with a static vane (7) corresponding to the fixing vanes (13), the static vane (7) is connected to the fixing seat (11), and the airflow channels among the moving vane (61), the static vane (7) and the fixing vanes (13) are connected.

6. The dust cup according to claim 5, wherein: The fixing seat (11) is hollowly provided with a communication cavity (14) in communication with the airflow channel of the static vane (7), and the communication cavity (14) is in communication with the slot of the combination of the segment core (21).

7. The dust cup according to claim 6, wherein: A plurality of support plates (15) connected to the fixing seat (11) are arranged at intervals on the inner side wall of the communication cavity (14).

8. The dust cup according to claim 7, wherein: The rotating shaft (31) is located in the fixed seat (11) and provided with a bearing assembly (8), the bearing assembly (8) comprises bearings (81) arranged at intervals and elastic members (82) arranged between the bearings (81).

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