A fan motor

Abstract

This utility model discloses a fan motor, including a base, a motor shaft inserted into the base, a PCB stator and a first rotor sleeved on the motor shaft, the PCB stator being fixedly connected to the base, and the first rotor being connected to the motor shaft via a bearing, the first rotor being located on the side of the PCB stator away from the base; it also includes a fan blade assembly, the fan blade assembly being fixedly connected to the first rotor. The fan motor of this utility model firstly uses a PCB as the stator, reducing the size and weight of the motor while ensuring power and speed, and at the same time, directly connecting the fan blade assembly to the first rotor further simplifies the structure of the motor, making the motor structure more compact.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a fan motor. Background Technology

[0002] Traditional motors typically consist of components such as a stator and a rotor with copper wire windings. These components determine that traditional motors have a certain weight and size. In the fan industry, whether in industrial or residential applications, there is a desire to minimize the size and weight of fan motors while still meeting specific requirements. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a fan motor. This fan motor first uses a PCB as the stator, which reduces the size and weight of the motor while ensuring power and speed. At the same time, the fan blade assembly is directly connected to the first rotor, further simplifying the structure of the motor and making the motor structure more compact.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model provides a fan motor, including a base, a motor shaft inserted into the base, a PCB stator and a first rotor sleeved on the motor shaft, the PCB stator being fixedly connected to the base, and the first rotor being connected to the motor shaft via a bearing, the first rotor being disposed on the side of the PCB stator away from the base;

[0006] It also includes a fan blade assembly, which is fixedly connected to the first rotor.

[0007] The fan motor of this invention uses a circuit board with wound coils as the stator. Compared with the traditional wound stator, its weight and volume are significantly reduced. In addition, the power transmission route of the traditional motor is motor rotor-motor shaft-fan blades. In this invention, the motor shaft is located inside the motor, and the power output is directly from the first rotor to the fan blade assembly. There is no traditional motor shell, and the power transmission is reduced by one step, which improves the efficiency of the motor and makes the structure more compact.

[0008] The fan motor of this invention first uses a PCB as the stator, which reduces the size and weight of the motor while ensuring power and speed. At the same time, the fan blade assembly is directly connected to the first rotor, which further simplifies the structure of the motor and makes the motor structure more compact.

[0009] In a further technical solution, a second rotor is also included, which is connected to the motor shaft via a bearing, and the second rotor is disposed on the side of the PCB stator near the base.

[0010] By setting rotors on both sides of the PCB stator, the addition of a second rotor can enhance magnetic conductivity, increase magnetic flux, counteract magnetic pull, and increase motor power.

[0011] In a further technical solution, two coaxially arranged bearings are fitted on the motor shaft, and an axial washer is fitted on the motor shaft between the two bearings. The axial washer has an annular structure, and the size of the annular structure matches the outer ring of the bearing.

[0012] By incorporating two bearings, the stability of rotor rotation is improved.

[0013] In a further technical solution, a wave spring is fitted on the motor shaft between the two bearings, and the size of the wave spring matches the inner ring of the bearing.

[0014] Since the two bearings are arranged coaxially, wave springs are used to prevent axial movement of the inner rings of the two bearings.

[0015] In a further technical solution, a retaining groove is provided on the motor shaft. The retaining groove is located on the side of the two bearings away from the base plate. A wire retaining ring is provided in the retaining groove, and the outer edge of the wire retaining ring protrudes from the retaining groove.

[0016] The steel wire retaining ring serves to axially limit the inner ring of the bearing, preventing the bearing from sliding outwards during long-term use.

[0017] In a further technical solution, the fan blade assembly includes arc-shaped fan blades, which are arranged in a circular array with the center of the base plate as the center. The center of the base plate is raised, and the annular area of ​​the arc-shaped fan blades is provided on the base plate. The height of the base plate gradually decreases from the direction close to the center of the base plate to the direction away from the center of the base plate.

[0018] The curved fan blades can generate swirling airflow, and combined with the curved bottom surface, the airflow channels between the curved fan blades are smoother, with less resistance and stronger wind.

[0019] In a further technical solution, the fan blade assembly also includes a fan blade fixing ring, which is simultaneously and securely connected to the top outer edge of all the curved fan blades in a circumferential manner.

[0020] By adding a fan blade retaining ring, the overall structural strength of the curved fan blades is enhanced, thus increasing the fan's service life.

[0021] In a further technical solution, a convex ring is provided at the connection between the first rotor and the bearing, and a first connecting mechanism and a second connecting mechanism are provided on the side of the base plate away from the arc-shaped fan blade. Both the first connecting mechanism and the second connecting mechanism are tubular bodies. The base plate is nested with the convex ring of the first rotor through the first connecting mechanism, and the base plate is nested with the radial outer edge of the first rotor through the second connecting mechanism.

[0022] The base plate is connected to the central convex ring of the first rotor and the outer edge front sleeve of the first rotor through the first connecting mechanism and the second connecting mechanism, respectively, which ensures the connection strength between the base plate and the first rotor and also ensures the stability of power transmission.

[0023] In a further technical solution, a first reinforcing rib and a second reinforcing rib are provided on the side of the base plate away from the arc-shaped fan blades. The first reinforcing rib is arc-shaped and its distribution is consistent with the distribution of the arc-shaped fan blades. The first reinforcing rib is located between the second connecting mechanism and the outer edge of the base plate. The second reinforcing rib is located between the first connecting mechanism and the second connecting mechanism. The second reinforcing rib is arranged radially along the base plate and is arranged in a circular array with the center of the base plate as the center.

[0024] The base plate has annular reinforcing rings in the areas where the first and second reinforcing ribs are provided.

[0025] By setting the first reinforcing rib, the second reinforcing rib, and the reinforcing ring, the structure of different areas on the base plate is strengthened respectively, which further increases the structural strength of the base plate and extends its service life.

[0026] In a further technical solution, the PCB stator is square, and a coil winding is provided on the PCB stator. The coil winding is provided on a ring-shaped area on the PCB stator, and mounting holes are provided at the four corners of the PCB stator.

[0027] Since the coil winding is arranged in a ring, the traditional approach is to purchase a PCB board that is larger than the outer circumference of the coil winding in order to open mounting holes outside the coil winding. This utility model uses a square PCB board, which maximizes the use of its space for the coil winding arrangement. The four corners left are then used to open mounting holes, resulting in lower costs.

[0028] The beneficial effects are:

[0029] 1. The fan motor of this utility model first uses a PCB as the stator, which reduces the size and weight of the motor while ensuring power and speed. At the same time, the fan blade assembly is directly connected to the first rotor, which further simplifies the structure of the motor and makes the motor structure more compact.

[0030] 2. By setting rotors on both sides of the PCB stator, the addition of a second rotor can enhance magnetic conductivity, increase magnetic flux, counteract magnetic pull, and increase motor power.

[0031] 3. By setting two bearings, the stability of rotor rotation is improved.

[0032] 4. Since the two bearings are arranged coaxially, wave springs are used to prevent axial movement of the inner rings of the two bearings.

[0033] 5. The steel wire retaining ring is used to axially limit the inner ring of the bearing, preventing the bearing from sliding outward during long-term use.

[0034] 6. The curved fan blades can generate swirling airflow. Combined with the curved bottom surface, this makes the airflow between the curved fan blades smoother, with less resistance and stronger wind.

[0035] 7. By setting a fan blade fixing ring, the overall structural strength of the arc-shaped fan blades is enhanced, and the service life of the fan is improved.

[0036] 8. The base plate is connected to the convex ring at the center of the first rotor and the outer edge front sleeve of the first rotor through the first connecting mechanism and the second connecting mechanism, respectively, which ensures the connection strength between the base plate and the first rotor and also ensures the stability of power transmission.

[0037] 9. By setting the first reinforcing rib, the second reinforcing rib, and the reinforcing ring, the structure of different areas on the base plate is strengthened respectively, which further increases the structural strength of the base plate and extends its service life.

[0038] 10. Since the coil winding is arranged in a ring, the traditional approach is to purchase a PCB board that is larger than the outer circumference of the coil winding in order to open mounting holes outside the coil winding. This utility model uses a square PCB board, which maximizes the use of its space for the coil winding arrangement. The four corners left are then used to open mounting holes, resulting in lower costs. Attached Figure Description

[0039] Figure 1 This is a three-dimensional structural diagram of the fan motor according to an embodiment of the present utility model;

[0040] Figure 2 This is a cross-sectional structural schematic diagram of the fan motor according to an embodiment of the present utility model;

[0041] Figure 3 yes Figure 2 A magnified schematic diagram of the partial structure at point A in the middle;

[0042] Figure 4 yes Figure 2A magnified schematic diagram of the local structure at point B;

[0043] Figure 5 This is a bottom view of the fan blade assembly of the fan motor according to an embodiment of the present utility model;

[0044] Figure 6 This is a top view of the fan blade assembly of the fan motor according to an embodiment of the present utility model;

[0045] Figure 7 This is a bottom view of the fan motor according to an embodiment of the present utility model;

[0046] Figure 8 This is a top view of the PCB stator of the fan motor according to an embodiment of the present invention.

[0047] 10. Base; 11. Motor shaft; 12. Bearing; 13. Axial washer; 14. Wave spring; 15. Steel wire retaining ring; 16. Fixing pin; 17. Cable connector; 18. Mounting component; 20. First rotor; 21. Second rotor; 22. Magnet; 30. PCB stator; 31. Coil winding; 32. Mounting hole; 40. Fan blade assembly; 41. Base plate; 411. First reinforcing rib; 412. Reinforcing ring; 413. Second reinforcing rib; 42. Arc-shaped fan blade; 43. Fan blade fixing ring; 44. First connecting mechanism; 45. Second connecting mechanism. Detailed Implementation

[0048] The present invention will be further described below with reference to the accompanying drawings:

[0049] Example:

[0050] A fan motor, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it includes a base 10, a motor shaft 11 inserted on the base 10, a PCB stator 30 and a first rotor 20 sleeved on the motor shaft 11, the PCB stator 30 is fixedly connected to the base 10, the first rotor 20 is connected to the motor shaft 11 through a bearing 12, and the first rotor 20 is located on the side of the PCB stator 30 away from the base 10.

[0051] It also includes a fan blade assembly 40, which is fixedly connected to the first rotor 20.

[0052] Specifically, in this embodiment, the edge of the PCB stator 30 extends beyond the edge of the first rotor 20. Therefore, the mounting method of the PCB stator 30 is as follows: Figure 4 As shown, a protruding fixing pin 16 is provided on the base plate 41, and a corresponding hole is provided on the PCB stator 30. The PCB stator 30 is fixed to the base 10 by the fixing pin 16.

[0053] PCB stator 30 refers to a circuit printed on a PCB board. The circuit forms a coil. When energized, the coil generates a magnetic field, thus playing the same role as a traditional stator 30 PCB.

[0054] Specifically, such as Figure 2 and Figure 4 As shown, a magnet 22 is provided on the side of the first rotor 20 facing the PCB stator 30. The magnet 22 generates a magnetic field and is driven by the PCB stator 30.

[0055] In this embodiment, a mounting component 18 connected to the base 10 is also included. The mounting component 18 is used to mount the fan motor. A cable connector 17 connected to the base 10 is also included. The cable connector 17 is electrically connected to the PCB stator 30.

[0056] The fan motor of this invention uses a circuit board with wound coils as the stator 30PCB. Compared with the traditional wound stator 30PCB, its weight and volume are significantly reduced. In addition, the power transmission route of the traditional motor is motor rotor-motor shaft 11-fan blade. In this invention, the motor shaft 11 is located inside the motor, and the power output is directly from the first rotor 20 to the fan blade assembly 40. There is no traditional motor shell, and the power transmission is reduced by one step, which improves the efficiency of the motor and makes the structure more compact.

[0057] The fan motor of this utility model first uses a PCB as the stator 30PCB, which reduces the size and weight of the motor while ensuring power and speed. At the same time, the fan blade assembly 40 is directly connected to the first rotor 20, which further simplifies the structure of the motor and makes the motor structure more compact.

[0058] In another embodiment, such as Figure 2 , Figure 3 and Figure 4 As shown, it also includes a second rotor 21, which is connected to the motor shaft 11 via a bearing 12. The second rotor 21 is located on the side of the PCB stator 30 near the base 10.

[0059] By setting rotors on both sides of the PCB stator 30, the addition of a second rotor 21 can enhance magnetic conductivity, increase magnetic flux, counteract magnetic pull, and increase the power of the motor.

[0060] In this embodiment, the second rotor 21 does not have a magnet.

[0061] In another embodiment, such as Figure 2 and Figure 3As shown, two coaxially arranged bearings 12 are fitted on the motor shaft 11, and an axial washer 13 is fitted on the motor shaft 11 between the two bearings 12. The axial washer 13 has a ring structure, and the size of the ring structure matches the outer ring of the bearing 12.

[0062] By setting two bearings 12, the stability of rotor rotation is improved.

[0063] The axial shim 13 eliminates the need for axial positioning of the two bearings 12 during assembly. Instead, one bearing 12, the axial shim 13, and the other bearing 12 are nested onto the motor shaft 11 in sequence. This also ensures the axial spacing between the outer rings of the two bearings 12.

[0064] In another embodiment, such as Figure 2 and Figure 3 As shown, a wave spring 14 is fitted on the motor shaft 11 between the two bearings 12, and the size of the wave spring 14 matches the inner ring of the bearing 12.

[0065] Since the two bearings 12 are arranged coaxially, a wave spring 14 is provided to prevent the inner rings of the two bearings 12 from moving axially.

[0066] In another embodiment, such as Figure 2 and Figure 3 As shown, a retaining groove is provided on the motor shaft 11. The retaining groove is located on the side of the two bearings 12 away from the base plate 41. A wire retaining ring 15 is provided in the retaining groove, and the outer edge of the wire retaining ring 15 protrudes from the retaining groove.

[0067] The steel wire retaining ring 15 serves to axially limit the inner ring of the bearing 12, preventing the bearing 12 from sliding outwards during long-term use.

[0068] In another embodiment, such as Figure 1 , Figure 2 and Figure 6 As shown, the fan blade assembly 40 includes arc-shaped fan blades 42, which are arranged in a circular array with the center of the base plate 41 as the center. The center of the base plate 41 is raised, and the annular area of ​​the arc-shaped fan blades 42 is provided on the base plate 41. The height of the base plate 41 gradually decreases from the direction close to the center of the base plate 41 to the direction away from the center of the base plate 41.

[0069] The curved fan blades can generate swirling airflow, and together with the curved bottom surface, the airflow channels between the curved fan blades 42 are smoother, with less resistance and stronger wind.

[0070] In another embodiment, such as Figure 1 , Figure 2 and Figure 6As shown, the fan blade assembly 40 also includes a fan blade retaining ring 43, which is fixedly connected to the top outer edge of all the curved fan blades 42 in a surrounding manner.

[0071] By setting the fan blade fixing ring 43, the overall structural strength of the arc-shaped fan blade 42 is enhanced, and the service life of the fan is improved.

[0072] In another embodiment, such as Figure 2 , Figure 3 and Figure 4 As shown, a convex ring is provided at the connection between the first rotor 20 and the bearing 12. A first connecting mechanism 44 and a second connecting mechanism 45 are provided on the side of the base plate 41 away from the side where the arc-shaped fan blade 42 is provided. Both the first connecting mechanism 44 and the second connecting mechanism are tubular bodies. The base plate 41 is nested with the convex ring of the first rotor 20 through the first connecting mechanism 44, and the base plate 41 is nested with the radial outer edge of the first rotor 20 through the second connecting mechanism 45.

[0073] In this embodiment, the first connecting mechanism 44 and the convex ring are interference fit, and the second connecting mechanism 45 has an annular shallow groove at the position where it is nested with the first rotor 20. The first rotor 20 is partially placed in the shallow groove. With the interference fit of the first connecting mechanism 44, the connection between the base plate 41 and the first rotor 20 is tighter.

[0074] The base plate 41 is connected to the convex ring at the center of the first rotor 20 and the outer edge front sleeve of the first rotor 20 through the first connecting mechanism 44 and the second connecting mechanism 45, respectively, which ensures the connection strength between the base plate 41 and the first rotor 20 and also ensures the stability of power transmission.

[0075] In another embodiment, such as Figure 4 and Figure 5 As shown, a first reinforcing rib 411 and a second reinforcing rib 413 are provided on the side of the base plate 41 away from the arc-shaped fan blade 42. The first reinforcing rib 411 is arc-shaped and its distribution is consistent with the distribution of the arc-shaped fan blade 42. The first reinforcing rib 411 is located between the second connecting mechanism 45 and the outer edge of the base plate 41. The second reinforcing rib 413 is located between the first connecting mechanism 44 and the second connecting mechanism 45. The second reinforcing rib 413 is arranged radially along the base plate 41 and is arranged in a ring array with the center of the base plate 41 as the center.

[0076] The base plate 41 is provided with annular reinforcing rings 412 in the areas where the first reinforcing rib 411 and the second reinforcing rib 413 are provided.

[0077] By setting the first reinforcing rib 411, the second reinforcing rib 413 and the reinforcing ring 412, the structure of different areas on the base plate 41 is strengthened respectively, which further makes the structural strength of the base plate 41 higher and the service life longer.

[0078] Specifically, the number of arc-shaped fan blades 42, the number of first reinforcing ribs 411, and the number of second reinforcing ribs 413 are the same. The position of the first reinforcing rib 411 corresponds one-to-one with the arc-shaped fan blades 42. One end of the second reinforcing rib 413 is connected to the first reinforcing rib 411 and the position of the second reinforcing rib 413 corresponds to that of the first reinforcing rib 411.

[0079] In another embodiment, such as Figure 7 and Figure 8 As shown, the PCB stator 30 is square, and a coil winding 31 is provided on the PCB stator 30. The coil winding 31 is provided on a ring-shaped area on the PCB stator 30, and mounting holes 32 are provided at the four corners of the PCB stator 30.

[0080] Since the coil winding 31 is arranged in a ring, the traditional approach is to purchase a PCB board that is larger than the outer periphery of the coil winding 31 in order to open the mounting holes 32 outside the coil winding 31. This utility model uses a square PCB board, which maximizes the use of its space for the arrangement of the coil winding 31, and the four corners left are just right for opening the mounting holes 32, which is more cost-effective.

[0081] Specifically, since only square PCB boards can be purchased, the traditional method is to first cut the square boards into circular boards and then make circular PCB boards for use. Therefore, the diameter of the circular PCB board is actually much larger than the diameter of the coil winding 31, for example, 10mm, in order to accommodate the wiring and mounting hole positions 32. However, in this invention, the mounting holes and wiring are designed directly at the four corners of the square. In this way, the side length only needs to be slightly larger than the diameter of the coil winding 31, for example, 2mm. Therefore, the side length of the PCB board purchased for the PCB stator 30 of this invention can be smaller, resulting in lower costs.

[0082] exist Figure 8 In order to facilitate the display of the overall structure, the specific winding structure of the coil winding 31 is hidden. It is understood that there are many existing technologies available in the field of PCB stator 30, so those skilled in the art can adopt the specific winding structure of the coil winding 31 in the prior art.

[0083] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A fan motor characterized by, The device includes a base, on which a motor shaft is inserted. A PCB stator and a first rotor are fitted onto the motor shaft. The PCB stator is fixedly connected to the base. The first rotor is connected to the motor shaft via a bearing. The first rotor is located on the side of the PCB stator away from the base. It also includes a fan blade assembly, which is fixedly connected to the first rotor.

2. The fan motor of claim 1, wherein, It also includes a second rotor, which is connected to the motor shaft via a bearing, and the second rotor is located on the side of the PCB stator near the base.

3. The fan motor of claim 1 or 2, wherein, Two coaxially arranged bearings are fitted on the motor shaft, and an axial shim is fitted on the motor shaft between the two bearings. The axial shim has a ring structure, and the size of the ring structure matches the outer ring of the bearing.

4. The fan motor of claim 3, wherein, A wave spring is fitted on the motor shaft between the two bearings, and the size of the wave spring matches the inner ring of the bearing.

5. The fan motor of claim 4, wherein, A retaining groove is provided on the motor shaft. The retaining groove is located on the side of the two bearings away from the base plate. A wire retaining ring is provided in the retaining groove, and the outer edge of the wire retaining ring protrudes from the retaining groove.

6. The fan motor of claim 1, wherein, The fan blade assembly includes arc-shaped fan blades, which are arranged in a circular array with the center of the base plate as the center. The center of the base plate is raised, and the annular area of ​​the arc-shaped fan blades is provided on the base plate. The height of the base plate gradually decreases from the direction close to the center of the base plate to the direction away from the center of the base plate.

7. The fan motor of claim 6, wherein, The fan blade assembly also includes a fan blade retaining ring, which is wrapped around and fixedly connected to the top outer edge of all the curved fan blades.

8. The fan motor of claim 6 or 7, wherein, A convex ring is provided at the connection between the first rotor and the bearing. A first connecting mechanism and a second connecting mechanism are provided on the side of the base plate away from the arc-shaped fan blade. Both the first connecting mechanism and the second connecting mechanism are tubular bodies. The base plate is nested with the convex ring of the first rotor through the first connecting mechanism. The base plate is nested with the radial outer edge of the first rotor through the second connecting mechanism.

9. The fan motor of claim 8, wherein, The base plate is provided with a first reinforcing rib and a second reinforcing rib on the side away from the arc-shaped fan blades. The first reinforcing rib is arc-shaped and its distribution is consistent with the distribution of the arc-shaped fan blades. The first reinforcing rib is located between the second connecting mechanism and the outer edge of the base plate. The second reinforcing rib is located between the first connecting mechanism and the second connecting mechanism. The second reinforcing rib is arranged radially along the base plate and is arranged in a ring array with the center of the base plate as the center. The base plate has annular reinforcing rings in the areas where the first and second reinforcing ribs are provided.

10. The fan motor of claim 1, wherein, The PCB stator is square, and a coil winding is provided on the PCB stator. The coil winding is provided in an annular area on the PCB stator, and mounting holes are provided at the four corners of the PCB stator.

Images