Motor of portable rotating equipment and portable fan

Abstract

The utility model provides a motor of portable rotating equipment, which is a high-speed three-phase motor, and comprises a cylinder body which comprises an outer ring part, an inner ring part and a plurality of connecting blades for connecting the outer ring part and the inner ring part, and a base plate and a hollow shaft cylinder which protrudes and extends towards a first direction from the base plate are formed in the inner ring part; the second circuit board is mounted at one end, back to the shaft barrel, of the inner ring part; a stator assembly and a rotor assembly, the stator assembly and the rotor assembly are nested and are fixed to the shaft barrel in a second direction opposite to the first direction, and the second circuit board is electrically connected with the stator assembly and drives the rotor assembly to rotate; the fan is arranged on one side of the stator assembly and the rotor assembly in the first direction, the fan comprises a hub and a plurality of blades arranged on the outer side of the hub, at least part of the hub radially increases and extends in the second direction, and at least part of the outer side of the hub is in an arc shape.

Description

Technical Field

[0001] The present application relates to the technical field of fans, and in particular to a motor of a high-speed and stable portable rotating device and a portable fan. Background Art

[0002] With the development of technology, people have higher and higher requirements for the portability of equipment, so that it can be used not only at home, but also on business trips, travel, and outdoors. Common portable rotating equipment include: portable fans, portable air pumps, portable hair dryers, portable food mixers, etc.

[0003] However, the motors of common portable rotating devices usually use conventional low-speed single-phase motors, which are low-cost but have poor performance. In order to provide sufficient power and speed, the motors are usually large in size, and the large motors make the overall size of these rotating devices larger, which greatly reduces the portability of these rotating devices. The balance between the performance and size of the motors of portable rotating devices is an urgent problem to be solved. Summary of the invention

[0004] In view of this, the present application provides a motor for a portable rotating device, which is a high-speed motor, comprising: a cylinder, including an outer ring portion, an inner ring portion, and a plurality of connecting blades connecting the outer ring portion and the inner ring portion; a stator assembly and a rotor assembly are nested on the inner ring portion; a second circuit board is arranged on the inner ring portion and electrically connected to the stator assembly; a fan is arranged on one side of the stator assembly and the rotor assembly; the second circuit board drives the rotor assembly to rotate, and the rotor assembly drives the fan to rotate. The motor has a compact structure, but can provide high-speed and stable driving capabilities.

[0005] The present application provides a motor for a portable rotating device, which is a high-speed three-phase motor, comprising: a cylinder, comprising an outer ring portion, an inner ring portion, and a plurality of connecting blades connecting the outer ring portion and the inner ring portion, wherein a substrate is formed in the inner ring portion, and a hollow shaft cylinder protrudes and extends from the substrate in a first direction; a second circuit board is installed at an end of the inner ring portion facing away from the shaft cylinder; a stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are nested and fixed to the shaft cylinder in a second direction opposite to the first direction, the second circuit board is electrically connected to the stator assembly and drives the rotor assembly to rotate; a fan is arranged on one side of the first direction of the stator assembly and the rotor assembly, the fan comprises a hub and a plurality of blades arranged on the outer side of the hub, at least a portion of the hub radially increases and extends in the second direction, and at least a portion of the outer side of the hub is arc-shaped.

[0006] Furthermore, a buffer is provided outside the outer ring portion; the rotor assembly includes a rotating shaft, a bearing and a magnetic ring, the bearing sleeve is arranged outside the rotating shaft, one end of the rotating shaft is inserted into the shaft cylinder in the second direction, the stator assembly is arranged on the radial outside of the shaft cylinder, the magnetic ring is arranged on the radial outside of the stator assembly, and the other end of the rotating shaft fixes the fan.

[0007] Furthermore, each of the blades includes a leading edge portion located in front of the fan rotation direction, a trailing edge portion located behind the fan rotation direction, a root portion connected to the hub, and a top portion opposite to the root portion; the curve length of the root portion is smaller than the curve length of the top portion.

[0008] Furthermore, the hub includes a top plate portion, a first side portion and a second side portion, the first side portion is connected to the edge of the top plate portion and radially increases and extends in a second direction, the second side portion is connected to the edge of the first side portion and radially increases and extends in the second direction, the outer sides of the first side portion and the second side portion are both arc-shaped, and the root portion is connected to the second side portion.

[0009] Furthermore, the blade is inclined from the leading edge to the trailing edge, and the angle between the root and the axial direction ranges from 35 to 75 degrees; the angle between the projection of the root on the second side and the projection of the top on the second side ranges from 5 to 15 degrees.

[0010] Furthermore, the projections of two adjacent blades in the axial direction at least partially overlap; and the spacing between the top and the inner side of the outer ring portion is 0.1-2 mm.

[0011] The present application also provides a portable fan having a motor of the above-mentioned portable rotating device, comprising: a shell, comprising an air inlet, an air outlet, and an air duct connecting the air inlet and the air outlet, the air duct extending along the length direction of the shell, and the motor being arranged in the air duct; a partition, arranged in the shell, the partition dividing the internal space of the shell into the air duct and a partition chamber; wherein the motor is arranged in the air duct, and the wind generated when the fan rotates passes through the air duct and is blown out from the air outlet.

[0012] Furthermore, the air duct includes a fixed cavity, the motor is fixed in the fixed cavity, and the fixed cavity is arranged close to the air inlet; the distance between the fixed cavity and the air inlet is 0.2-3 times the axial length of the fan.

[0013] Furthermore, the length direction of the shell is in the same direction as the axial direction, the cross-sectional area of ​​the air duct close to the air inlet is larger than the cross-sectional area of ​​the air duct close to the air outlet; the cross-sectional area of ​​the partition cavity close to the air inlet is smaller than the cross-sectional area of ​​the partition cavity close to the air outlet; and the air outlet is provided with an air guide plate.

[0014] Furthermore, the motor is arranged at a position of the air duct close to the air inlet; it also includes a power supply and a first circuit board, the second circuit board is electrically connected to the first circuit board, the power supply is electrically connected to the first circuit board, the power supply and the first circuit board are arranged in the partition cavity, and the first circuit board is also electrically connected to a switch and an interface exposed outside the shell.

[0015] Compared with the prior art, the motor of the portable rotating device of the present application has the following beneficial effects: the stator assembly and the rotor assembly are nested and fixed to the shaft cylinder, the second circuit board is installed at the end of the inner ring portion facing away from the shaft cylinder, the fan is arranged on one side of the stator assembly and the rotor assembly, and the overall structure of the motor is compact and can well meet the portability requirements. The motor is a high-speed three-phase motor that can provide high-speed and stable driving performance. In addition, at least a portion of the hub radially increases and extends in the second direction, and at least a portion of the outer side of the hub is arc-shaped, which can effectively enhance the wind pressure and improve the wind outlet effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a three-dimensional diagram of a portable fan provided in an embodiment of the present application;

[0017] Figure 2 is a cross-sectional view of a portable fan provided in an embodiment of the present application;

[0018] Figure 3 is a three-dimensional cross-sectional view of a portable fan provided in an embodiment of the present application;

[0019] Figure 4 is a three-dimensional diagram of a motor of a portable rotating device provided in an embodiment of the present application;

[0020] Figure 5 is a cross-sectional view of a motor of a portable rotating device provided in an embodiment of the present application;

[0021] Figure 6 is a bottom view of a motor of a portable rotating device provided in an embodiment of the present application;

[0022] Figure 7 is a side view of a fan blade provided in an embodiment of the present application;

[0023] Figure 8 is a three-dimensional diagram of a portable fan provided by another embodiment of the present application;

[0024] Fig. 9 is a cross-sectional view of a portable fan provided in another embodiment of the present application. DETAILED DESCRIPTION

[0025] In order to facilitate a better understanding of the purpose, structure, features, and functions of the present application, the present application is further described in conjunction with the accompanying drawings and specific implementation methods.

[0026] It should be noted that when an element is considered to be “connected to” another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0027] In this application, descriptions such as “first”, “second”, etc. are only used for descriptive purposes and should not be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features.

[0028] In the description of the present application, the terms "front", "back", "left", "right", "up", "down", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present application.

[0029] In one embodiment, Figure 5 and Figure 6 As shown, the motor of the portable rotating device of the present application can be applied to a variety of portable rotating devices, such as: portable fans, portable air pumps, portable hair dryers, portable food blenders, etc., without limitation to the examples, and the present application is mainly explained by taking the application in portable fans as an example.

[0030] In one embodiment, Figures 1 to 3 As shown, the portable fan comprises a housing 1, the housing 1 comprises an air inlet 11, an air outlet 12, and an air duct 13 connecting the air inlet 11 and the air outlet 12. The air duct 13 extends along the length direction of the housing 1, and the motor is arranged in the air duct 13. A first circuit board 9 and a power supply 8 are also arranged in the housing 1, the power supply 8 is electrically connected to the first circuit board 9, and the first circuit board 9 is also electrically connected to a switch 91 and an interface 92 exposed outside the housing 1.

[0031] In one embodiment, Figures 3 to 5As shown, the motor includes a cylinder 2. The cylinder 2 includes an outer ring portion 21, an inner ring portion 22, and a plurality of connecting blades 23 connecting the outer ring portion 21 and the inner ring portion 22. A base plate 24 is formed in the inner ring portion 22, and a hollow shaft cylinder 25 protrudes and extends from the base plate 24 in a first direction. The motor also includes a stator assembly 4, a rotor assembly 5 and a fan 6, wherein the stator assembly 4 and the rotor assembly 5 are nested and fixed to the shaft cylinder 25 in a second direction opposite to the first direction. The fan 6 is arranged on one side of the first direction of the stator assembly 4 and the rotor assembly 5, and the fan 6 includes a hub 61 and a plurality of blades 62 arranged on the outer side of the hub 61, wherein the hub 61 as a whole radially increases and extends in the second direction, and the outer side of a part of the hub 61 is arc-shaped. In other embodiments, a part of the hub 61 may be radially increased and extended in the second direction, or the hub 61 as a whole radially increases and extends in the second direction, and the outer side of the entire hub 61 is arc-shaped. The hub 61 is in a conical or truncated cone shape, and at least a portion of the outer side of the hub 61 is arc-shaped. The hub 61 has a function of enhancing wind pressure.

[0032] In one embodiment, Figures 3 to 5 As shown, the second circuit board 3 is installed at one end of the inner ring portion 22 facing away from the shaft cylinder 25, that is, the second circuit board 3 is installed at one end of the inner ring portion 22 in the second direction, which facilitates the electrical connection between the second circuit board 3 and the first circuit board 9. The stator assembly 4 and the rotor assembly 5 are nested and fixed to the shaft cylinder 25. The second circuit board 3 is installed at one end of the inner ring portion 22 facing away from the shaft cylinder 25. The fan 6 is arranged on one side of the stator assembly 4 and the rotor assembly 5. The overall structure of the motor is compact and can well meet the portability. The motor is a high-speed three-phase motor that can provide high-speed and stable driving performance. In addition, at least a portion of the hub 61 radially increases and extends in the second direction, and at least a portion of the outer side of the hub 61 is arc-shaped, which can effectively enhance the wind pressure and improve the wind outlet effect.

[0033] In one embodiment, Figure 3 and Figure 5 As shown, the length of the inner ring portion 22 is less than the length of the outer ring portion 21, and one end of the inner ring portion 22 in the second direction exceeds one end of the outer ring portion 21 in the second direction. Without increasing the radial space of the cylinder 2, the axial length of the cylinder 2 is extended, making the overall structure of the motor more reasonable.

[0034] In one embodiment, Figure 4 and Figure 5As shown, a buffer 26 is disposed outside the outer ring portion 21. The buffer 26 may surround the side and end surface of the outer ring portion 21, or only surround the side surface of the outer ring portion 21, or only surround the end surface of the outer ring portion 21, as long as it can provide a buffering and shock absorbing effect for the outer ring portion 21, and is not limited to the example. It should be understood that the material of the buffer 26 can be silicone, or other materials with a certain elasticity that can provide buffering.

[0035] In one embodiment, Figure 5 As shown, the rotor assembly 5 includes a rotating shaft 51, a bearing 52 and a magnetic ring 53, wherein the bearing 52 is sleeved outside the rotating shaft 51, and one end of the rotating shaft 51 is inserted into the shaft cylinder 25 in the second direction. The stator assembly 4 is arranged on the radial outer side of the shaft cylinder 25, and the magnetic ring 53 is arranged on the radial outer side of the stator assembly 4. The other end of the rotating shaft 51 is fixed with the fan 6, and the fan 6 does not exceed the outer ring portion 21. The motor structure is reasonably arranged, which is conducive to the design of the portability of the portable fan. In this embodiment, the first direction and the second direction are parallel to the axial direction. In this embodiment, there are two bearings 52, one of which is arranged in the shaft cylinder, and the other is arranged outside the shaft cylinder 25 and arranged in the stator assembly 4. An elastic member (not shown) can be arranged between the two bearings 52. In other embodiments, both of the two bearings 52 can be arranged in the shaft cylinder 25.

[0036] In one embodiment, Figures 5 to 7 As shown, the hub 61 includes a top plate portion 611, a first side portion 612, and a second side portion 613. The first side portion 612 is connected to the edge of the top plate portion 611, and radially increases and extends in the second direction, the second side portion 613 is connected to the edge of the first side portion 612, and radially increases and extends in the second direction, and the first side portion 612 and the second side portion 613 are both arc-shaped, which can effectively enhance the wind pressure and improve the wind outlet effect.

[0037] In one embodiment, Figures 5 to 7 As shown, each of the blades 62 includes a leading edge portion 621 located in front of the rotation direction of the fan 6, a trailing edge portion 622 located behind the rotation direction of the fan 6, a root portion 623 connected to the hub 61, and a top portion 624 opposite to the root portion 623, and the root portion 623 is connected to the second side portion 613.

[0038] In one embodiment, Figures 5 to 7As shown, the length of the curve of the root 623 is smaller than the length of the curve of the top 624, and the length of the curve of the top 624 is longer, that is, the blade 62 is an inverted trapezoid with a slightly smaller root 623 and a slightly larger top 624, which helps to stir the air and form a breeze. The blade 62 is tilted from the leading edge 621 to the trailing edge 622, and the angle between the root 623 and the axial direction is in the range of 35-75°. While ensuring that a faster wind speed can be provided, the air can also be sheared at a small angle, thereby effectively reducing wind noise. The angle between the projection of the root 623 on the second side 613 and the projection of the top 624 on the second side 613 is in the range of 5-15°. With this arrangement, the blade 62 can shear the air at a small angle, making the delivered wind more uniform and softer, and the mute effect better. The angle between the projection of the root 623 on the second side 613 and the projection of the top 624 on the second side 613 should not be too large, otherwise the wind resistance will increase, which is not conducive to the rotation of the fan 6. Of course, it should not be too small, otherwise the above effect will not be achieved.

[0039] In one embodiment, Figure 6 As shown, the fan 6 is provided with 9 blades 62, and the 9 blades 62 are evenly spaced on the outer peripheral surface of the hub 61. From an axial perspective, the projections of two adjacent blades 62 in the axial direction at least partially overlap, but the two adjacent blades 62 are tilted, so there is a sufficient interval between the two adjacent blades 62. Therefore, it can form multiple blades 62 to jointly cut the air and form a wind, and the feasibility and simplicity of manufacturing the blades 62 are taken into consideration. Of course, in other embodiments, the blades 62 can be other numbers. From an axial perspective, the projections of the multiple tops 624 are on the same circle, and the projections of the multiple tops 624 and the projection of the outer ring portion 21 are concentric circles. The spacing between the top 624 and the inner side of the outer ring portion 21 is 0.1-2mm to ensure the air suction capacity of the fan 6.

[0040] In one embodiment, Figure 4 and Figure 5 As shown, the cylinder 2 also includes a plurality of extension leaves (not numbered, the same below), the plurality of extension leaves correspond to the plurality of connecting leaves 23 one by one, and extend from the connecting leaves 23 toward the first direction to form the extension leaves, and the extension leaves extend in an arc shape toward the first direction. The plurality of extension leaves surround the radial outer side of the stator assembly 4 and the magnetic ring 53, and the wind generated by the rotation of the fan 6 is guided and combed by the plurality of extension leaves, and then blows the air outlet 12 toward the second direction through the connecting leaves 23.

[0041] In one embodiment, Figure 2 and Figure 3As shown, a partition 7 is provided in the housing 1, and the partition 7 divides the internal space of the housing 1 into the air duct 13 and the partition chamber 14. The motor is arranged in the air duct 13, and the wind generated by the rotation of the fan 6 passes through the air duct 13 and is blown out from the air outlet 12. In this embodiment, the partition 7 directly divides the internal space of the housing 1 into two parts, namely, the air duct 13 and the partition chamber 14. In another embodiment, Figure 8 and Fig. 9 As shown, the partition 7 divides the internal space of the housing into three parts, and the partition chamber 14 has two separate parts. One part of the partition chamber 14 is arranged in the radial inner middle area of ​​the housing 1 and is arranged opposite to the motor, and is used to accommodate the power supply 8; the other part of the partition chamber 14 is arranged in the radial inner area of ​​the outer wall of the housing 1 and is arranged around the motor, and is used to accommodate the first circuit board 9.

[0042] In one embodiment, Figure 2 and Figure 3 As shown, the air duct 13 includes a fixed cavity 131, and the motor is fixed in the fixed cavity 131. The fixed cavity 131 is arranged close to the air inlet 11, which is conducive to the fan 6 to suck and cut the external air to form blowing. The distance between the fixed cavity 131 and the air inlet 11 is 0.2-3 times the axial length of the fan 6 to ensure that there is an air suction space between the air inlet 11 and the fixed cavity 131, and the external wind can be buffered and guided in the space to effectively reduce noise. In another embodiment, as Figure 8 and Fig. 9 As shown, the air duct 13 also includes a fixed cavity 131, and the motor is fixed in the fixed cavity 131. The fixed cavity 131 is arranged close to the air inlet 11, and the distance between the fixed cavity 131 and the air inlet 11 is also 0.2-3 times the axial length of the fan 6, so as to ensure that there is an air suction space between the air inlet 11 and the fixed cavity 131, and the external wind can be buffered and guided in the space to effectively reduce noise.

[0043] In one embodiment, Figures 1 to 3As shown, the length direction of the shell 1 is in the same direction as the axial direction. The cross-sectional area of ​​the air duct 13 close to the air inlet 11 is larger than the cross-sectional area of ​​the air duct 13 close to the air outlet 12. The motor is arranged at a position of the air duct 13 close to the air inlet 11. The wind formed by the fan 6 at one end close to the air inlet 11 is blown out from the air outlet 12 through the air duct 13 with a reduced cross-sectional area, and the wind is more concentrated. The cross-sectional area of ​​the partition cavity 14 close to the air inlet 11 is smaller than the cross-sectional area of ​​the partition cavity 14 close to the air outlet 12. The power supply 8 and the first circuit board 9 are arranged in the partition cavity 14. The first circuit board 9 is relatively small in size and is arranged in a position of the partition cavity 14 close to the air inlet 11; the power supply 8 is relatively large in size and is arranged in a position of the partition cavity 14 close to the air outlet 12. The internal space layout of the shell 1 is reasonable. In another embodiment, as Figure 8 and Fig. 9 As shown, the cross-sectional area of ​​the air duct 13 close to the air inlet 11 can also be set to be larger than the cross-sectional area of ​​the air duct 13 close to the air outlet 12, so that the air outlet is more concentrated and the wind effect is better.

[0044] In one embodiment, Figure 2 As shown, the air outlet 12 is further provided with an air guide plate 15. The provision of the air guide plate 15 can help guide the outflow of wind and reduce wind loss. Fig. 9 As shown, the arrangement of the air guide plate 15 is the same as that of the previous embodiment, and will not be repeated here.

[0045] The above detailed description is only an explanation of the preferred embodiment of the present application, and does not limit the patent scope of the present application. Therefore, all equivalent technical changes made by using the description and illustrations of this creation are included in the patent scope of this creation.

Claims

1. A motor for a portable rotating device, which is a high-speed three-phase motor, characterized in that: include: The cylinder comprises an outer ring portion, an inner ring portion, and a plurality of connecting leaves connecting the outer ring portion and the inner ring portion, wherein a base plate is formed in the inner ring portion, and a hollow shaft cylinder protrudes and extends from the base plate toward a first direction; A second circuit board is mounted on an end of the inner ring portion facing away from the shaft cylinder; A stator assembly and a rotor assembly, wherein the stator assembly and the rotor assembly are nested and fixed to the shaft cylinder in a second direction opposite to the first direction, and the second circuit board is electrically connected to the stator assembly and drives the rotor assembly to rotate; A fan is arranged on one side of the stator assembly and the rotor assembly in a first direction. The fan includes a hub and a plurality of blades arranged on the outer side of the hub. At least a portion of the hub radially increases and extends in a second direction, and at least a portion of the outer side of the hub is arc-shaped.

2. The motor of the portable rotating device according to claim 1, characterized in that: A buffer is provided outside the outer ring portion; the rotor assembly includes a rotating shaft, a bearing and a magnetic ring, the bearing sleeve is arranged outside the rotating shaft, one end of the rotating shaft is inserted into the shaft cylinder toward the second direction, the stator assembly is arranged on the radial outside of the shaft cylinder, and the magnetic ring is arranged on the radial outside of the stator assembly; the other end of the rotating shaft fixes the fan, and the fan does not exceed the outer ring portion.

3. The motor of the portable rotating device according to claim 1, characterized in that: Each of the blades includes a leading edge located in front of the fan rotation direction, a trailing edge located behind the fan rotation direction, a root connected to the hub, and a top opposite to the root; the curve length of the root is smaller than the curve length of the top.

4. The motor of the portable rotating device according to claim 3, characterized in that: The hub includes a top plate portion, a first side portion, and a second side portion. The first side portion is connected to the edge of the top plate portion and radially increases and extends in a second direction. The second side portion is connected to the edge of the first side portion and radially increases and extends in the second direction. The outer sides of the first side portion and the second side portion are both arc-shaped, and the root portion is connected to the second side portion.

5. The motor of the portable rotating device according to claim 4, characterized in that: The blade is inclined from the leading edge to the trailing edge, and the angle between the root and the axial direction is in the range of 35-75°; the angle between the projection of the root on the second side and the projection of the top on the second side is in the range of 5-15°.

6. The motor of the portable rotating device according to claim 3, characterized in that: The projections of two adjacent blades in the axial direction at least partially overlap; the spacing between the top and the inner side of the outer ring portion is 0.1-2 mm.

7. A portable fan having a motor of a portable rotating device as claimed in any one of claims 1 to 6, characterized in that: include: A housing, comprising an air inlet, an air outlet, and an air duct connecting the air inlet and the air outlet, wherein the air duct extends along the length direction of the housing, and the motor is disposed in the air duct; A partition, disposed in the shell, the partition partitioning the inner space of the shell into the air duct and the partition cavity; Wherein, the motor is arranged in the air duct, and the wind generated when the fan rotates passes through the air duct and is blown out from the air outlet.

8. The portable fan according to claim 7, characterized in that: The air duct includes a fixed cavity, the motor is fixed in the fixed cavity, and the fixed cavity is arranged close to the air inlet; the distance between the fixed cavity and the air inlet is 0.2-3 times the axial length of the fan.

9. The portable fan according to claim 7, characterized in that: The length direction of the shell is in the same direction as the axial direction, the cross-sectional area of ​​the air duct close to the air inlet is larger than the cross-sectional area of ​​the air duct close to the air outlet; the cross-sectional area of ​​the partition cavity close to the air inlet is smaller than the cross-sectional area of ​​the partition cavity close to the air outlet; the air outlet is provided with an air guide plate.

10. The portable fan according to claim 9, characterized in that: The motor is arranged at a position of the air duct close to the air inlet; it also includes a power supply and a first circuit board, the second circuit board is electrically connected to the first circuit board, the power supply is electrically connected to the first circuit board, the power supply and the first circuit board are arranged in the partition cavity, and the first circuit board is also electrically connected to a switch and an interface exposed outside the shell.

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