TWI578669B - Axial induction motor, fan and rotor thereof - Google Patents

Description

Axial induction motor, fan and its rotor

The present invention relates to an axial induction motor, a fan and a rotor thereof, and more particularly to a rotor provided with a magnetic sealing plate and an axial induction motor and fan having the same.

Referring to Fig. 1, there is shown a conventional axial induction motor 9 comprising a stator 91 provided with a shaft tube 911 for a rotational coupling of a rotor 92. The inside of the rotor 92 has a magnet 921 and a metal ring 922, so that a magnetic interlinking action can be generated between the stator 91 and the magnet 921 to drive the rotor 92 to rotate. An embodiment of the conventional axial induction motor 9 has been disclosed in the "Thin Heat Dissipation Mechanism" patent of Chinese Patent No. 200610072272.8.

The metal ring 922 is usually disposed on the rotor 92 through a tight fit or the like, and the magnet 921 is coupled to the metal ring 922 via magnetic attraction or the like to enable the metal ring 922 to provide a magnetic sealing action. However, if the bonding relationship between the magnet 921 and the metal ring 922 is not sufficiently stabilized, the magnet 921 may be displaced relative to the metal ring 922 during the rotation of the rotor 92. The magnet 921 directly abuts against the metal ring 922, so that the magnet 921 is displaced relative to the metal ring 922, which causes the magnet 921 and the metal ring 922 to rub against each other to cause wear, and even the magnet 921 is generated. The metal ring 922 is detached. Furthermore, since the magnet 921 and the metal ring 922 are made of a material having poor flexibility, when a magnetic interlinking action occurs between the stator 91 and the magnet 921, the magnet 921 is forced to make the rotor. 92 generates vibration, which in turn causes poor sound quality when the axial induction motor 9 is in operation.

In view of this, there is a need to provide a further improved axial induction motor, fan and rotor thereof for improving the durability of the axial induction motor and the sound quality of the operation.

One object of the present invention is to provide an axial induction motor and a fan comprising a rotor provided with a cushioning member that abuts a permanent magnet.

In order to achieve the foregoing object, the technical means of the present invention includes: a rotor of an axial induction motor according to an embodiment of the present invention, comprising: a housing; a magnetic member, the magnetic sealing member being disposed on the housing; a buffering member comprising a first surface and a second surface, the first surface abutting the magnetic sealing member or the housing; and a permanent magnet, the permanent magnet abutting the second of the buffering member The surface has a distance between the permanent magnet and the sealing member in the axial direction of the rotor.

The rotor of the axial induction motor of the above embodiment, wherein the first surface and the second surface are respectively formed on the two sides of the buffer member in the axial direction of the rotor, and the first surface abuts the housing, the seal The magnetic member has a first height in the axial direction, and the buffer member has a second height in the axial direction, and the second height is greater than the first height. Thereby, the permanent magnet and the sealing member can form a spacing in the axial direction of the rotor, so that the permanent magnet does not directly abut against the sealing member.

The rotor of the axial induction motor of the above embodiment, wherein a gap is formed between the permanent magnet and the magnetic sealing member. Thereby, the gap can prevent the permanent magnet from contacting the magnetic sealing member.

The rotor of the axial induction motor of the above embodiment, wherein the buffering member is further connected to an extending portion extending toward the gap, and the two sides of the extending portion respectively abut the permanent magnet and the sealing member. Thereby, the buffering member abuts the permanent magnet and the sealing member respectively via the extending portion, so that the buffering member can more effectively prevent the vibration generated by the permanent magnet from being transmitted to the sealing member or the casing.

In the rotor of the axial induction motor of the above embodiment, the housing is provided with a covering portion that covers the inner circumference or the outer circumference of the sealing member. Thereby, the covering portion can improve the bonding stability of the magnetic sealing member and the housing.

The rotor of the axial induction motor of the above embodiment, wherein the housing is provided with a rotating shaft parallel to the axial direction of the rotor. Thereby, the rotating shaft can be coupled to one of the bearings of the stator so that the stator can be rotatably coupled to the rotor.

An axial induction fan provided with a rotor of an axial induction motor as in the above embodiment, and further comprising: a stator for rotatably coupling the rotor; and a plurality of blades each disposed on the rotor The outer circumference of the casing. Thereby, the rotor can be driven by the blades to generate an air flow when the rotor rotates.

A rotor of an axial induction motor according to another embodiment of the present invention includes: a magnetic member; a buffer member, the buffer member comprising a first surface and a second surface, the first surface abutting the magnetic sealing member; And a permanent magnet, the permanent magnet abuts against the second surface of the buffering member, and the permanent magnet has a distance from the sealing member in the axial direction of the rotor.

A rotor for an axial induction motor according to another embodiment of the invention, wherein the magnetic sealing member is provided with a rotating shaft parallel to the axial direction of the rotor. Thereby, the rotating shaft can be coupled to one of the bearings of the stator so that the stator can be rotatably coupled to the rotor.

A rotor for an axial induction motor according to another embodiment, wherein the magnetic sealing member and the rotating shaft are coupled to each other by laser welding. Thereby, the magnetic sealing member and the rotating shaft can have better bonding stability.

An axial induction fan provided with a rotor of an axial induction motor according to another embodiment described above, and further comprising: a stator for rotatably coupling the rotor; and a plurality of blades each disposed on the seal The outer circumference of the magnetic piece. Thereby, the rotor can be driven by the blades to generate an air flow when the rotor rotates.

a rotor of an axial induction motor according to each of the above embodiments, wherein the buffer member An inner ring wall is further disposed on the inner circumference, and the inner ring wall extends along the axial direction of the rotor and abuts the permanent magnet. Alternatively, an outer ring wall is further disposed on the outer periphery of the buffer member, and the outer ring wall extends along the axial direction of the rotor and abuts the permanent magnet. Or alternatively, an inner ring wall and an outer ring wall are respectively disposed on the inner circumference and the outer circumference of the buffer member. Thereby, the buffer member can cover the permanent magnet by the inner ring wall or the outer ring wall to more effectively prevent the vibration generated by the permanent magnet from being transmitted to the sealing member or the casing.

The rotor of the axial induction motor according to each of the above embodiments, wherein the first surface and the second surface are respectively formed on two sides of the buffer member in an axial direction of the rotor, and the first surface abuts the magnetic sealing member. Thereby, the first surface abuts the magnetic sealing member, and the second surface abuts the permanent magnet, so that the permanent magnet and the sealing member have a spacing in the axial direction, so that the permanent magnet does not directly Abut against the magnetic closure. In addition, the buffering member abuts the permanent magnet and the sealing member respectively, so that the buffering member can more effectively prevent the vibration generated by the permanent magnet from being transmitted to the sealing member or the casing.

The rotor of the axial induction motor according to each of the above embodiments, wherein the magnetic sealing member is made of a magnetically permeable material, and the cushioning member is made of a soft material such as rubber, silicone, foam, double-sided tape or resin. Thereby, the magnetic sealing member can provide a magnetic effect on the permanent magnet, and the buffering member can effectively absorb the vibration of the permanent magnet.

An axial induction motor is provided with a rotor of an axial induction motor as in the above embodiments, and further comprising: a stator for rotatably coupling the rotor. Thereby, the stator can be magnetically coupled to the permanent magnet of the rotor after its coil is energized, so that the rotor can rotate relative to the stator.

According to the foregoing structure, the axial induction motor of the embodiments of the present invention wears the permanent magnet of the rotor and the magnetic sealing member in the axial direction to prevent the permanent magnet from rubbing against the magnetic sealing member to cause wear. It has the effect of improving the durability of the axial induction motor. Furthermore, the cushioning member can absorb the vibration of the permanent magnet, reduce the vibration generated when the axial induction motor of each embodiment operates, and has the effect of improving the operational sound quality of the axial induction motor.

〔this invention〕

1‧‧‧Rotor

11‧‧‧Shell

111‧‧‧Covering Department

12‧‧‧Magnetic parts

13‧‧‧ permanent magnet

14‧‧‧ cushioning parts

14a‧‧‧ first surface

14b‧‧‧ second surface

141‧‧‧Extension

142‧‧‧ Inner Ring Wall

143‧‧‧Outer ring wall

15‧‧‧ shaft

2‧‧‧stator

21‧‧‧ bearing

22‧‧‧ coil

3‧‧‧ leaves

H1‧‧‧ first height

H2‧‧‧second height

G‧‧‧ gap

[study]

9‧‧‧Axial induction motor

91‧‧‧ Stator

911‧‧‧ shaft tube

92‧‧‧Rotor

921‧‧‧ magnet

922‧‧‧Metal ring

Fig. 1 is a cross-sectional view showing the structure of a conventional axial induction motor.

Fig. 2 is a cross-sectional view showing the structure of an axial induction motor according to a first embodiment of the present invention.

Fig. 3 is a cross-sectional view showing the structure of a rotor according to a first embodiment of the present invention.

Fig. 4 is a cross-sectional view showing the structure of the outer peripheral edge of the sealing member of the embodiment of the present invention.

Fig. 5 is a cross-sectional view showing the structure of a rotor according to a second embodiment of the present invention.

Fig. 6 is a cross-sectional view showing the structure of a rotor according to a third embodiment of the present invention.

Fig. 7 is a cross-sectional view showing the structure of an inner ring wall of a cushioning member according to a third embodiment of the present invention.

Fig. 8 is a cross-sectional view showing the structure of an outer ring wall of a cushioning member according to a third embodiment of the present invention.

Fig. 9 is a cross-sectional view showing the structure of an inner ring wall and an outer ring wall of a cushioning member according to a third embodiment of the present invention.

Fig. 10 is a cross-sectional view showing the structure of a rotor according to a fourth embodiment of the present invention.

The above and other objects, features and advantages of the present invention will become more <RTIgt; The axial induction motor according to the first embodiment of the present invention comprises a rotor 1 and a stator 2, and the rotor 1 is rotatably coupled to the stator 2.

The rotor 1 includes a housing 11, a magnetic member 12, a permanent magnet 13, and a buffer member 14. The magnetic member 12 is disposed on the housing 11. The buffer member 14 includes a first surface 14a and a first surface. The second surface 14b abuts the housing 11 and the second surface 14b abuts the permanent magnet 13.

The first surface 14a and the second surface 14b are respectively formed on both sides of the buffer member 14 in the axial direction of the rotor 1. The magnetic sealing member 12 has a first height H1 in the axial direction, and the buffering member 14 has a second height H2 in the axial direction, and the second height H2 is the first surface 14a and the second surface 14b. distance. In this embodiment, the second height H2 is greater than the first height H1 such that the permanent magnet 13 and the magnetic sealing member 12 have a spacing in the axial direction of the rotor 1; in other words, the permanent magnet 13 does not directly abut The magnetic member 12 is touched.

The magnetic sealing member 12 is made of a magnetically permeable material to provide a magnetic effect to the permanent magnet 13. The cushioning member 14 can be made of a soft material such as rubber, silicone, foam, double-sided tape or resin. In this embodiment, the buffer member 14 abuts the inner periphery of the magnetic sealing member 12. However, as shown in FIG. 4, in some embodiments of the present invention, the buffer member 14 can also abut the magnetic sealing member. The outer periphery of the member 12; or the buffer member 14 may not contact the magnetic sealing member 12, and the invention is not limited thereto. Since the second height H2 of the buffer member 14 is greater than the first height H1 of the magnetic sealing member 12, a gap G is formed between the permanent magnet 13 and the sealing member 12. Thereby, the gap G can prevent the permanent magnet 13 from contacting the magnetic sealing member 12.

The stator 2 is rotatably coupled to the rotor 1. More specifically, the stator 2 is usually provided with a bearing 21, and the housing 11 of the rotor 1 is provided with a rotating shaft 15, which can be parallel to the axial direction of the rotor 1, and the rotating shaft 15 is rotatably coupled to The bearing 21 allows the stator 2 to be rotatably coupled to the rotor 1. The stator 2 may be additionally provided with a coil 22, and the permanent magnet 13 of the rotor 1 is directed toward the coil 22 along the axial direction.

With the above structure, when the axial induction motor of the first embodiment of the present invention is actually used, the stator 2 can be magnetically coupled with the permanent magnet 13 of the rotor 1 after the coil 22 is energized, so that the rotor 1 can be relatively The stator 2 rotates. Wherein, when the axial induction motor of the first embodiment is to be applied to an axial induction fan, the outer periphery of the casing 11 of the rotor 1 may be provided with a plurality of blades 3, each of which may be integrally formed with the casing 11. The rotor 1, the stator 2 and each of the blades 3 may together constitute the axial induction fan. Each of the blades 3 and the rotor 1 As one of the axial induction fans, the rotor 1 can be driven by the blades 3 to generate airflow when the rotor 1 rotates.

Therefore, the axial induction motor of the first embodiment of the present invention is provided with a buffer member 14 by the rotor 1 to utilize the buffer member 14 to make the permanent magnet 13 and the sealing member 12 in the axial direction of the rotor 1. With the spacing, even if the permanent magnet 13 is displaced relative to the sealing member 12, since the permanent magnet 13 does not directly abut against the sealing member 12, the permanent magnet 13 or the sealing member 12 does not wear out. And caused poor quality.

Furthermore, since the buffer member 14 can be made of a flexible material that is preferably flexible, and the second surface 14b of the cushioning member 14 abuts the permanent magnet 13, between the stator 2 and the permanent magnet 13 When the magnetic cross-linking action is generated, the buffering member 14 can effectively absorb the vibration of the permanent magnet 13 to prevent the vibration from being transmitted to the magnetic sealing member 12 or the casing 11, so that the axial induction motor and the fan of the first embodiment are operated. The vibration generated during the time is reduced.

As shown in FIG. 4, in some embodiments of the present invention, the housing 11 may be provided with a covering portion 111 covering the inner circumference of the magnetic sealing member 12 to enhance the magnetic sealing. The combination of the piece 12 and the housing 11 is stable.

Referring to FIG. 5, the rotor 1 of the axial induction motor according to the second embodiment of the present invention is different from the first embodiment in that the buffer member 14 is further connected to an extension portion 141. The 141 is extended toward the gap G, and the extending portion 141 abuts the permanent magnet 13 and the magnetic sealing member 12 on both sides in the axial direction. Thereby, the buffering member 14 respectively abuts the permanent magnet 13 and the magnetic sealing member 12 via the extending portion 141, so that the buffering member 14 can more effectively prevent the vibration generated by the permanent magnet 13 from being transmitted to the magnetic sealing member 12. Or the housing 11. In addition, in the embodiment, the housing 11 can also be provided with a covering portion 111, which covers the outer periphery of the magnetic sealing member 12, and can also lift the magnetic sealing member 12 and the housing. The combination of 11 is stable.

Referring to FIG. 6, a rotor 1 of an axial induction motor according to a third embodiment of the present invention, the rotor 1 also includes a buffer member 14, and the buffer member 14 also includes a first surface. 14a and a second surface 14b are different from the first and second embodiments described above in that the first surface 14a abuts the magnetic sealing member 12. Therefore, since the first surface 14a and the second surface 14b are respectively formed on both sides of the buffer member 14 in the axial direction of the rotor 1, in the embodiment, the first surface 14a is abutted against the magnetic sealing member. 12, and the second surface 14b abuts the permanent magnet 13, so that the permanent magnet 13 and the magnetic sealing member 12 have a spacing in the axial direction, so that the permanent magnet 13 does not directly contact the magnetic sealing. Item 12. In addition, the buffering member 14 abuts the permanent magnet 13 and the sealing member 12 respectively, so that the buffering member 14 can more effectively prevent the vibration generated by the permanent magnet 13 from being transmitted to the sealing member 12 or the housing 11.

Referring to FIG. 7, the buffer member 14 of the axial induction motor of the third embodiment may be further provided with an inner ring wall 142, which may be formed on the inner circumference of the buffer member 14, and the inner portion The ring wall 142 extends toward the permanent magnet 13 along the axial direction of the rotor 1 and abuts against the permanent magnet 13. Thereby, the cushioning member 14 can cover the permanent magnet 13 by the inner ring wall 142 to more effectively prevent the vibration generated by the permanent magnet 13 from being transmitted to the magnetic sealing member 12 or the casing 11.

Referring to FIG. 8, the buffer member 14 of the axial induction motor of the third embodiment may be further provided with an outer ring wall 143, which may be formed on the outer periphery of the buffer member 14, and the outer portion. The ring wall 143 also extends toward the permanent magnet 13 along the axial direction of the rotor 1 and abuts against the permanent magnet 13. Thereby, the cushioning member 14 can cover the permanent magnet 13 by the outer ring wall 143 to more effectively prevent the vibration generated by the permanent magnet 13 from being transmitted to the magnetic sealing member 12 or the casing 11.

For the same reason, as shown in FIG. 9, the buffer member 14 of the axial induction motor of the third embodiment may be further provided with an inner ring wall 142 and an outer ring wall 143, whereby the buffer member 14 can simultaneously be used by The inner ring wall 142 and the outer ring wall 143 cover the permanent magnet 13 to completely cover the permanent magnet 13, and more effectively prevent the vibration generated by the permanent magnet 13 from being transmitted to the magnetic sealing member 12 or the casing 11.

In the foregoing embodiments, the rotor 1 includes a housing 11 for the magnetic sealing member 12, but please refer to FIG. 10 for axial sensing according to the fourth embodiment of the present invention. The rotor 1 of the motor is different from the first to third embodiments described above in that the rotor 1 can be provided with the housing 11 , and the rotor 1 can be provided with a rotating shaft 15 on the magnetic sealing member 12 . For rotatably coupling to the stator 2. Wherein, the magnetic sealing member 12 is made of a magnetic conductive material, and the rotating shaft 15 is generally made of a metal material, so that the magnetic sealing member 12 and the rotating shaft 15 can be combined with each other by laser welding, and the magnetic sealing member 12 and The shaft 15 can have better bond stability. The first surface 14a and the second surface 14b of the buffer member 14 abut against the magnetic sealing member 12 and the permanent magnet 13, respectively. Thereby, the permanent magnet 13 and the magnetic sealing member 12 will have a pitch in the axial direction as well. When the axial induction motor of the fourth embodiment is to be applied to an axial induction fan, the outer periphery of the magnetic sealing member 12 of the rotor 1 may be provided with a plurality of blades 3, each of which can be coupled to the sealing member by injection molding. The magnetic member 12, the rotor 1, the stator 2 and the respective blades 3 can together constitute the axial induction fan, so that when the rotor 1 rotates, each of the blades 3 can also be used to drive air to generate airflow. The rotor 1 of the axial induction motor of the fourth embodiment can directly replace the aforementioned casing 11 with the magnetic sealing member 12. In this embodiment, the buffer member 14 may also be provided with an inner ring wall 142 or an outer ring wall 143 as shown in the foregoing third embodiment, and will not be further described.

In summary, the axial induction motor and the fan of the embodiments of the present invention have a distance between the permanent magnet 13 and the magnetic sealing member 12 of the rotor 1 in the axial direction, even if the permanent magnet 13 is opposite to the magnetic sealing member 12 Since the permanent magnet 13 does not directly abut against the magnetic sealing member 12, the permanent magnet 13 or the magnetic sealing member 12 does not wear out and cause poor quality, and the lifting axial induction motor and the fan are indeed provided. The durability of the effect.

Furthermore, since the buffer member 14 can be made of a flexible material that is preferably flexible, and the second surface 14b of the cushioning member 14 abuts the permanent magnet 13, between the stator 2 and the permanent magnet 13 When the magnetic cross-linking action is generated, the buffering member 14 can effectively absorb the vibration of the permanent magnet 13, and the vibration generated by the axial induction motor and the fan in each embodiment is reduced, and the axial induction motor and the fan are indeed improved. The effect of running sound quality.

Although the present invention has been disclosed using the above preferred embodiments, it is not intended to be limiting The present invention is not limited to the spirit and scope of the present invention, and various modifications and changes to the above embodiments are still within the technical scope of the present invention. Therefore, the scope of protection of the present invention is attached. The scope defined in the scope of application for patent application shall prevail.

1‧‧‧Rotor

11‧‧‧Shell

12‧‧‧Magnetic parts

13‧‧‧ permanent magnet

14‧‧‧ cushioning parts

14a‧‧‧ first surface

14b‧‧‧ second surface

15‧‧‧ shaft

2‧‧‧stator

21‧‧‧ bearing

22‧‧‧ coil

3‧‧‧ leaves

G‧‧‧ gap

Claims (18)

A rotor for an axial induction motor includes: a housing; a magnetic member disposed on the housing; a buffer member including a first surface and a second surface, the first The surface abuts the magnetic sealing member or the casing; and a permanent magnet abuts against the second surface of the buffering member, the permanent magnet and the sealing member having a distance in the axial direction of the rotor. The rotor of the axial induction motor of claim 1, wherein the first surface and the second surface are respectively formed on two sides of the buffer member in an axial direction of the rotor, and the first surface abuts The housing has a first height in the axial direction, and the buffer member has a second height in the axial direction, the second height being greater than the first height. The rotor of an axial induction motor according to claim 2, wherein a gap is formed between the permanent magnet and the magnetic sealing member. The rotor of the axial induction motor of claim 3, wherein the buffer member is further connected to an extension portion, the extension portion extends toward the gap, and the two sides of the extension portion respectively abut the permanent magnet and the above Seal the magnetic parts. The rotor of the axial induction motor of claim 1, wherein the first surface and the second surface are respectively formed on two sides of the buffer member in an axial direction of the rotor, and the first surface abuts the seal Magnetic parts. The rotor of an axial induction motor according to claim 1, wherein the housing is provided with a rotating shaft parallel to the axial direction of the rotor. The rotor of an axial induction motor according to claim 1, wherein the casing is provided with a covering portion that covers an inner circumference or an outer circumference of the sealing member. A rotor for an axial induction motor comprising: a magnetic member; a buffer member comprising a first surface and a second surface, the first surface abutting the magnetic sealing member; and a permanent magnet, the permanent magnet abutting the buffer member The two surfaces have a distance between the permanent magnet and the magnetic sealing member in the axial direction of the rotor. The rotor of the axial induction motor of claim 8, wherein the first surface and the second surface are respectively formed on the buffer side of the rotor in the axial direction of the rotor. The rotor of an axial induction motor according to claim 8, wherein the magnetic sealing member is provided with a rotating shaft parallel to the axial direction of the rotor. The rotor of an axial induction motor according to claim 10, wherein the magnetic sealing member and the rotating shaft are coupled to each other by laser welding. The rotor of the axial induction motor of claim 1, wherein the inner peripheral edge of the cushioning member is further provided with an inner ring wall, and the inner ring wall edge The rotor extends axially and abuts the permanent magnet. The rotor of the axial induction motor of claim 1, wherein the outer peripheral edge of the buffer member is further provided with an outer ring wall. The rotor extends axially and abuts the permanent magnet. The rotor of an axial induction motor according to the first, fifth, sixth, seventh, eighth, ninth, tenth or eleventh aspect of the invention, wherein the inner circumference and the outer circumference of the cushioning member are respectively provided with an inner ring wall and an outer portion. The inner wall and the outer ring wall respectively extend along the axial direction of the rotor and abut the permanent magnet. The rotor of an axial induction motor according to any one of claims 1 to 11, wherein the magnetic sealing member is made of a magnetically permeable material, and the buffering member is made of rubber, silicone, foam, double-sided tape or Made of soft materials such as resin. An axial induction motor provided with the shaft according to any one of claims 1 to 11 The rotor of the induction motor, and further comprising: a stator for the rotor to be rotatably coupled. An axial induction fan provided with a rotor of an axial induction motor as described in claim 1, 2, 3, 4, 5, 6 or 7 of the patent application, and further comprising: a stator for the rotor to be rotatable And a plurality of blades, each of the blades being disposed on an outer circumference of the casing of the rotor. An axial induction fan provided with a rotor of an axial induction motor as described in claim 8, 9, 10 or 11 and further comprising: a stator for rotatably coupling the rotor; and a plurality of The blades, each of the blades is disposed on an outer circumference of the magnetic sealing member.