Direct-current brushless ceiling fan motor
By setting obliquely opening heat dissipation holes and designing protective mechanisms on the shell and cover of the DC brushless ceiling fan motor, the problems of motor heating and loose magnets are solved, better heat dissipation effect and protection capabilities are achieved, and the service life of the motor is extended.
Patent Information
- Application Number
- CN202421769170.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-24
AI Technical Summary
Existing brushless DC motors are prone to heat up during long-term use, affecting reliable performance, and impact of external components can easily cause the rotor magnet to loosen, affecting the rotation speed and stability.
A DC brushless ceiling fan motor is designed, which enhances the heat dissipation effect by setting multiple obliquely openings on the lower end of the motor housing and the cover plate; at the same time, a protective mechanism, including a support block and a rubber cylinder, can rotate and offset the external impact force and reduce the impact on the motor.
It effectively extends the service life of the motor, improves the protection ability of DC brushless motors, and prevents the problems of heating and loose magnets.
Smart Images
Figure CN222827076U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of brushless motors, in particular to a direct current brushless ceiling fan motor. Background Art
[0002] Fan motors are divided into AC motors, DC brushless motors and DC brushed motors. For example, a ceiling fan includes a housing, a fan motor and blades outside the housing. A DC brushless motor includes a stator and a rotor. The stator includes an iron core and a coil winding. The iron core includes a yoke with a central hole and a plurality of teeth evenly distributed on the periphery of the yoke. The teeth are provided with tooth tops outside. The coil winding includes a winding package wound on each tooth. There is a notch between two adjacent teeth to accommodate the coil package. When the coil winding is energized, an independent magnetic line of force is formed on each tooth top. It cooperates with the magnetic unit of the inner ring of the rotor to drive the rotation of the DC brushless motor.
[0003] Existing ceiling fans generally use more energy-saving and efficient brushless DC motors. When the current brushless DC motors are used for a long time, the motors tend to heat up, which affects the reliability of the motors. When external components impact the brushless DC motors, the impact force of the components tends to cause the rotor magnets of the brushless DC motors to loosen, affecting the speed and stability, and further affecting the normal operation of the brushless DC motors.
[0004] Based on this, a DC brushless ceiling fan motor is now provided, which can eliminate the disadvantages of the existing devices. Utility Model Content
[0005] The utility model aims to provide a brushless DC ceiling fan motor to solve the problem that the current brushless DC motor is prone to heat up when used for a long time, which affects the reliability of the motor, and when external components impact the brushless DC motor, the impact force of the components easily causes the rotor magnet of the brushless DC motor to loosen, affecting the speed and stability, and further affecting the normal operation of the brushless DC motor.
[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0007] A DC brushless ceiling fan motor comprises a shell, a rotating shaft is arranged in the shell, a plurality of rotor magnets are arranged inside the shell, and the rotor magnets are limited to the inner side of the shell according to the alternating arrangement of N poles and S poles, a stator magnetic steel sheet is arranged at the center of the rotor magnet, a coil is wound around the surface of the stator magnetic steel sheet, the coil is formed by a single wire, and both ends of the coil are externally connected to a DC power supply, a cover plate is arranged at the top of the shell, and a protective mechanism is arranged on the outer side of the shell.
[0008] On the basis of the above technical solutions, the present invention also provides the following optional technical solutions:
[0009] In an optional solution: the cover plate is fixedly connected to the housing via a plurality of screws, and the cover plate is rotatably connected to the rotating shaft via a first bearing.
[0010] In an optional solution: a plurality of mounting holes are arranged on the outer side of the cover plate surface.
[0011] In an optional solution: a plurality of first heat dissipation holes are arranged on the surface of the cover plate outside the rotating shaft, and the first heat dissipation holes are oblique openings, and the direction of the oblique openings of the first heat dissipation holes is opposite to the rotation direction of the motor.
[0012] In an optional solution: the bottom end of the shell is rotatably connected to the rotating shaft via a second bearing, and a plurality of second heat dissipation holes with oblique openings are arranged on the surface of the bottom end of the shell, and the direction of the oblique openings of the second heat dissipation holes is the same as the rotation direction of the motor and opposite to the opening direction of the first heat dissipation holes.
[0013] In an optional solution: the protection mechanism includes a plurality of support blocks, a plurality of the support blocks are symmetrically arranged on the outer surface of the housing, and rubber cylinders are rotatably connected between the support blocks.
[0014] In an optional solution: a protective shell is arranged on the outer side of the shell, and the bottom end of the protective shell is rotatably connected to the rotating shaft.
[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0016] 1. The utility model provides a plurality of heat dissipation holes with oblique openings communicating with the inner cavity of the motor housing on the lower end of the motor housing and the cover plate respectively. The oblique openings at the bottom end of the housing are oriented opposite to the oblique openings on the cover plate. The oblique openings at the bottom end of the housing are oriented in the same direction as the motor rotation direction, and the oblique openings on the upper shell of the motor are oriented in the opposite direction. When the motor housing rotates, external air enters the inner cavity of the motor housing from the oblique openings on the motor cover plate, and then flows out from the oblique openings at the bottom end of the motor housing, so that the heat dissipation effect is better and the service life of the motor is extended.
[0017] 2. The utility model symmetrically arranges a plurality of support blocks on the outer surface of the shell, and a rubber tube is rotatably connected between the support blocks. A protective shell is arranged on the outer side of the shell, and the bottom end of the protective shell is rotatably connected to the rotating shaft. When the protective shell is impacted by external components, the surface of the rubber tube is subjected to force, and the rotating rubber tube can rotate and offset the impact force of the component, thereby reducing the impact force of the component on the shell and improving the protection capability of the DC brushless motor. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0019] Figure 2 It is a schematic diagram of the internal structure of the shell of the utility model.
[0020] Figure 3 It is a schematic diagram of the overall internal structure of the utility model.
[0021] Figure 4 It is a schematic diagram of the structure of the protection mechanism of the utility model.
[0022] Notes on the figure numbers: 1. outer shell; 2. cover plate; 3. screw; 4. mounting hole; 5. first heat dissipation hole; 6. first bearing; 7. rotating shaft; 8. rotor magnet; 9. stator magnetic steel sheet; 10. coil; 11. second bearing; 12. support block; 13. rubber tube; 14. protective shell; 15. second heat dissipation hole. DETAILED DESCRIPTION
[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.
[0024] In one embodiment, Figure 1-Figure 4 As shown, a DC brushless ceiling fan motor includes a shell 1, a rotating shaft 7 is arranged in the shell 1, a plurality of rotor magnets 8 are arranged on the inner side of the shell 1, and the rotor magnets 8 are limited to the inner side of the shell 1 according to the alternating arrangement of N poles and S poles, a stator magnetic steel sheet 9 is arranged at the center of the rotor magnet 8, a coil 10 is wound around the surface of the stator magnetic steel sheet 9, the coil 10 is formed by a single wire, and both ends of the coil 10 are externally connected to a DC power supply, a cover plate 2 is arranged on the top of the shell 1, and a protective mechanism is arranged on the outer side of the shell 1, the power supply can provide DC energy for the coil 10, and the N and S magnetic poles generated by the coil 10 inside the stator magnetic steel sheet 9 are rotated by rotating the power supply direction of the coil 10 according to the Hall signal, so that the rotor magnet 8 drives the shell 1 to rotate.
[0025] In one embodiment, Figure 1 As shown, the cover plate 2 is fixedly connected to the housing 1 via a plurality of screws 3 , and the cover plate 2 is rotatably connected to the rotating shaft 7 via a first bearing 6 .
[0026] In one embodiment, Figure 1 As shown, a plurality of mounting holes 4 are provided on the outer side of the surface of the cover plate 2, and the cover plate 2 is fixedly connected to the ceiling fan through the mounting holes 4.
[0027] In one embodiment, Figure 1 As shown, a plurality of first heat dissipation holes 5 are arranged on the surface of the cover plate 2 outside the rotating shaft 7, and the first heat dissipation holes 5 are oblique openings. The direction of the oblique openings of the first heat dissipation holes 5 is opposite to the rotation direction of the motor, so that during the rotation of the motor housing, external air enters the inner cavity of the motor housing 1 from the oblique openings on the motor cover plate 2.
[0028] In one embodiment, Figure 2 As shown, the bottom end of the housing 1 is rotatably connected to the rotating shaft 7 via a second bearing 11, and a plurality of second heat dissipation holes 15 with oblique openings are arranged on the bottom surface of the housing 1, and the direction of the oblique openings of the second heat dissipation holes 15 is the same as the rotation direction of the motor, and opposite to the opening direction of the first heat dissipation holes 5. The air in the motor housing flows out from the oblique openings at the bottom end of the motor housing 1, so the heat dissipation effect is better and the service life of the motor is extended.
[0029] In one embodiment, Figure 4 As shown, the protective mechanism includes a plurality of support blocks 12 symmetrically arranged on the outer surface of the housing 1, and a rubber tube 13 is rotatably connected between the support blocks 12. When impacted by external components, the surface of the rubber tube is subjected to force, and the rotating rubber tube can rotate and offset the impact force of the component.
[0030] In one embodiment, as shown in the figure, a protective shell 14 is provided on the outer side of the outer shell 1, and the bottom end of the protective shell 14 is rotatably connected to the rotating shaft 7. The protective shell 14 can reduce the impact force of the components on the internal outer shell 1 and improve the protection capability of the brushless DC motor.
[0031] The above embodiment discloses a DC brushless ceiling fan motor. When in use, the ceiling fan is fixedly connected to the cover plate 2 through the mounting hole 4. When the power supply provides DC energy to the coil 10, the control chip detects the current position of the rotor magnet 8 and the stator magnetic steel sheet 9 according to the Hall signal provided by the Hall sensor, and then controls a plurality of power tubes in pairs to make the coil 10 on the surface of the stator magnetic steel sheet 9 generate N and S magnetic poles that are attracted to the S and N magnetic poles of the stator magnetic steel sheet 9 to generate torque, and according to the Hall signal, the power supply direction of the coil 10 is rotated to control the N and S magnetic poles generated by the coil 10 inside the stator magnetic steel sheet 9 to rotate, so that the rotor magnet 8 drives the housing 1 to rotate, thereby driving the ceiling fan to work.
[0032] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A brushless DC ceiling fan motor, comprising a housing (1), wherein a rotating shaft (7) is arranged in the housing (1), characterized in that: A plurality of rotor magnets (8) are arranged inside the shell (1), and the rotor magnets (8) are placed inside the shell (1) in an alternating manner with N poles and S poles. A stator magnetic steel sheet (9) is arranged at the center of the rotor magnet (8). A coil (10) is wound around the surface of the stator magnetic steel sheet (9). The coil (10) is formed by a single wire, and both ends of the coil (10) are externally connected to a DC power supply. A cover plate (2) is arranged at the top of the shell (1), and a protective mechanism is arranged on the outside of the shell (1).
2. The brushless DC ceiling fan motor according to claim 1, characterized in that: The cover plate (2) is fixedly connected to the outer shell (1) via a plurality of screws (3), and the cover plate (2) is rotationally connected to the rotating shaft (7) via a first bearing (6).
3. The brushless DC ceiling fan motor according to claim 1, characterized in that: A plurality of mounting holes (4) are arranged on the outer side of the surface of the cover plate (2).
4. The brushless DC ceiling fan motor according to claim 1, characterized in that: A plurality of first heat dissipation holes (5) are arranged on the surface of the cover plate (2) outside the rotating shaft (7), and the first heat dissipation holes (5) are oblique openings. The direction of the oblique openings of the first heat dissipation holes (5) is opposite to the rotation direction of the motor.
5. The brushless DC ceiling fan motor according to claim 1, characterized in that: The bottom end of the housing (1) is rotatably connected to the rotating shaft (7) via a second bearing (11); a plurality of second heat dissipation holes (15) with oblique openings are arranged on the bottom end surface of the housing (1); and the direction of the oblique openings of the second heat dissipation holes (15) is the same as the rotation direction of the motor and opposite to the opening direction of the first heat dissipation holes (5).
6. The brushless DC ceiling fan motor according to claim 1, characterized in that: The protection mechanism comprises a supporting block (12), a plurality of the supporting blocks (12) are symmetrically arranged on the outer surface of the housing (1), and rubber cylinders (13) are rotatably connected between the supporting blocks (12).
7. The brushless DC ceiling fan motor according to claim 1, characterized in that: A protective shell (14) is arranged outside the outer shell (1), and the bottom end of the protective shell (14) is rotatably connected to the rotating shaft (7).