CN111327132A - External rotor motor - Google Patents
External rotor motor Download PDFInfo
- Publication number
- CN111327132A CN111327132A CN201811594498.3A CN201811594498A CN111327132A CN 111327132 A CN111327132 A CN 111327132A CN 201811594498 A CN201811594498 A CN 201811594498A CN 111327132 A CN111327132 A CN 111327132A
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- Prior art keywords
- magnetic
- rotor motor
- metal casing
- permanent magnet
- external rotor
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- 230000005291 magnetic effect Effects 0.000 claims abstract description 194
- 238000007789 sealing Methods 0.000 claims abstract description 139
- 239000002184 metal Substances 0.000 claims abstract description 126
- 239000004020 conductor Substances 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims description 20
- 230000000694 effects Effects 0.000 description 27
- 238000004804 winding Methods 0.000 description 9
- 230000004907 flux Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000005389 magnetism Effects 0.000 description 2
- 238000004080 punching Methods 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2786—Outer rotors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K5/00—Casings; Enclosures; Supports
- H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
Abstract
An outer rotor motor is used for a larger ceiling fan or fan and is used for solving the problems that the existing integral weight is too large and the stamping processing is not easy. This external rotor motor includes: a metal shell made of magnetic conductive material and having a ring wall, wherein a stator is arranged in the metal shell; a permanent magnet positioned in the metal shell and arranged around the periphery of the stator; and at least one sealing magnetic ring annularly arranged on the annular wall, wherein the at least one sealing magnetic ring is positioned between the permanent magnet and the metal shell, or the annular wall is positioned between the at least one sealing magnetic ring and the permanent magnet.
Description
Technical Field
The present invention relates to an external rotor motor, and more particularly to an external rotor motor for a large ceiling fan or fan.
Background
Generally, a conventional industrial factory building is an open working area in a large range, and in order to improve the flow of air, a large ceiling fan is mostly installed on a ceiling, and the large ceiling fan is provided with a metal shell, a stator, a permanent magnet and a plurality of fan blades, wherein the stator is arranged in the metal shell, the permanent magnet is arranged on the inner wall of the metal shell and is aligned to the stator, the plurality of fan blades are combined with the shell, and the plurality of fan blades rotate to cause large-area air supply, so that the working environment in the factory building can be more comfortable.
However, the volume of each component of the large ceiling fan is larger, wherein when the permanent magnet is larger, the metal shell needs to be increased to a certain thickness to generate the magnetic sealing effect on the permanent magnet, but if the thickness of the metal shell is increased, the metal shell is difficult to be manufactured by stamping, so that the processing is not easy, and in addition, the weight of the whole large ceiling fan is too large, so that the large ceiling fan is difficult to be installed on the ceiling.
In view of the above, there is a need for improvement of existing large ceiling fans.
Disclosure of Invention
In order to solve the above problems, the present invention provides an outer rotor motor, which is an outer rotor motor capable of reducing the weight of a large ceiling fan and improving the magnetic sealing effect.
All directions or similar expressions such as "front", "back", "left", "right", "top", "bottom", "inner", "outer", "side", etc. are mainly used to refer to the directions of the drawings, and are only used to assist the description and understanding of the embodiments of the present invention, and are not used to limit the present invention.
The terms "combination", "combination" or "assembly" used throughout the present invention mainly include the separation of the components without damaging the components after connection, or the inseparability of the components after connection, and can be selected by those skilled in the art according to the material or assembly requirements of the components to be connected.
The invention provides an external rotor motor used for a large ceiling fan, comprising: the metal shell is made of magnetic conductive materials and provided with an annular wall, and a stator is arranged in the metal shell; a permanent magnet located in the metal shell and arranged around the periphery of the stator; and at least one sealing magnetic ring is annularly arranged on the annular wall, and the at least one sealing magnetic ring is positioned between the permanent magnet and the metal shell, or the annular wall is positioned between the at least one sealing magnetic ring and the permanent magnet.
Therefore, according to the outer rotor motor of the present invention, the at least one magnetic sealing ring is located between the permanent magnet and the metal casing, or the annular wall is located between the at least one magnetic sealing ring and the permanent magnet, so that the metal casing and the at least one magnetic sealing ring can simultaneously conduct magnetic conduction to leakage flux, thereby the metal casing and the at least one magnetic sealing ring can provide at least two layers of magnetic sealing effects, and further the magnetic sealing effect can be improved.
The at least one magnetic sealing ring is arranged on the outer peripheral wall of the annular wall of the metal shell in a surrounding mode, and the permanent magnet is combined with the inner peripheral wall of the annular wall of the metal shell. Thus, the at least one magnet sealing ring has the function of sealing the permanent magnet in the radial direction.
The metal shell is provided with a top wall, the at least one sealing magnetic ring is provided with a first extending portion, the first extending portion extends towards the top wall of the metal shell, and the first extending portion axially shields the permanent magnet. Therefore, the magnet sealing ring has the effect of sealing the permanent magnet in the axial direction.
The metal shell is provided with a bottom plate extending from the annular wall in the radial direction, the at least one sealing magnetic ring is provided with a second extending part, the second extending part extends towards the bottom plate of the metal shell in the radial direction, the second extending part is provided with a through hole, and the through hole is penetrated and arranged by a fixing part. Therefore, the magnetic sealing ring has the effect of fixing the at least one magnetic sealing ring on the metal shell.
The at least one magnetic sealing ring is annularly arranged on the inner peripheral wall of the annular wall of the metal shell, and the permanent magnet is combined with the inner wall of the at least one magnetic sealing ring. Thus, the at least one magnet sealing ring has the function of sealing the permanent magnet in the radial direction.
The metal shell is provided with a top wall, the at least one sealing magnetic ring is provided with a first extending portion, the first extending portion extends towards the top wall of the metal shell, and the first extending portion axially shields the permanent magnet. Thus, the at least one magnetic sealing ring has the effect of sealing the permanent magnet in the axial direction.
Wherein, the at least one magnetic sealing ring is made of magnetic conductive material. Thus, the magnetic flux leakage is conducted to the magnetic conduction effect.
Wherein, the at least one magnetic sealing ring is tightly matched and combined with the metal shell. Therefore, the effect of improving the combination stability is achieved.
Wherein, the at least one magnetic sealing ring is welded with the metal shell. Therefore, the effect of improving the combination stability is achieved.
Wherein, the at least one magnetic sealing ring is combined with the metal shell in a screw joint way. Thus, the assembly is easy.
Wherein, the thickness of the metal shell is less than or equal to 3mm and is made by stamping. Therefore, the metal shell has the advantages of reducing the weight of the metal shell and being easy to manufacture.
Wherein, the total thickness of the metal shell and the at least one magnetic sealing ring is more than 3mm and less than or equal to 6 mm. Therefore, the weight of the outer rotor motor is reduced.
The metal shell is provided with a bottom plate extending from the annular wall in the radial direction, the at least one sealing magnetic ring is provided with a second extending part, the second extending part extends towards the bottom plate of the metal shell in the radial direction, the second extending part is provided with a through hole, and the through hole is penetrated and arranged by a fixing part. Therefore, the magnetic sealing ring has the effect of fixing the at least one magnetic sealing ring on the metal shell.
Wherein, in addition, include a locating piece, this locating piece is located this metal casing, and this permanent magnet location combines in this locating piece. Thus, the permanent magnet has the function of ensuring that the permanent magnet is positioned at the right position.
Wherein, a clearance is arranged between the positioning piece and the inner peripheral wall, and the at least one magnetic sealing ring extends to the clearance. Therefore, the magnetic sealing ring has the effect of increasing the range of the magnetic sealing effect of the at least one magnetic sealing ring on the permanent magnet in the radial direction.
The at least one magnetic sealing ring is provided with a first extending part, the first extending part extends towards the top of the permanent magnet, and the first extending part is connected between the permanent magnet and the positioning part. Thus, the first extension part has the effect of axially shielding the permanent magnet.
The number of the magnetic sealing rings is two, one of the magnetic sealing rings is annularly arranged on the outer peripheral wall of the metal shell, and the other magnetic sealing ring is annularly arranged on the outer wall of the one magnetic sealing ring. Therefore, the magnetic sealing device has the effects of further improving the magnetic sealing effect and the processing convenience.
The annular wall of the metal shell is bent along the top of the permanent magnet to form a shoulder, the shoulder is positioned between the annular wall and the top wall, and the shoulder is used for positioning and combining the permanent magnet. Thus, the permanent magnet has the function of ensuring that the permanent magnet is positioned at the right position.
Wherein, one of the magnetic-sealing rings has a first extending portion extending radially toward the permanent magnet, and the other magnetic-sealing ring has a radial extending portion extending toward the first extending portion of the one magnetic-sealing ring. Therefore, the permanent magnet can be axially shielded by one of the magnetic sealing ring and the other magnetic sealing ring, and the axial height of the outer rotor motor is ensured not to be increased.
Drawings
FIG. 1: the metal shell of the first embodiment of the invention combines the permanent magnet and the cross section structure chart of the magnetic sealing ring;
FIG. 2: a partial enlarged view of a in fig. 1;
FIG. 3: a partial enlarged view of the second embodiment of the invention;
FIG. 4: a partial enlarged view of the third embodiment of the invention;
FIG. 5: a partial enlarged view of the fourth embodiment of the invention;
FIG. 6: a partial enlarged view of a fifth embodiment of the invention;
FIG. 7: a partial enlarged view of a sixth embodiment of the invention;
FIG. 8: an enlarged view of a portion of the seventh embodiment of the invention;
FIG. 9: a partial enlarged view of the eighth embodiment of the invention;
FIG. 10: a partial enlarged view of a ninth embodiment of the invention;
description of the reference numerals
1 Metal housing 10 surround wall
11 inner peripheral wall 12 outer peripheral wall
13 stator 131 winding assembly
14 axle center 15 top wall
16 bottom plate 17 shoulder
2 permanent magnet
3 seal the magnetic ring 3' and seal the magnetic ring
3a inner wall 3b outer wall
31 first extension 31' radial extension
32 second extension part
321 through hole
4 fixing part
5 positioning piece
D gap
G air gap
And R, a rotor.
Detailed Description
In order to make the aforementioned and other objects, features and advantages of the invention more comprehensible, preferred embodiments accompanied with figures are described in detail below:
referring to fig. 1, it is a first embodiment of the present invention of an external rotor motor, which is used in a large ceiling fan, and includes a metal casing 1, a permanent magnet 2 and at least one sealing ring 3, wherein the permanent magnet 2 is located in the metal casing 1, and the at least one sealing ring 3 is annularly disposed on the metal casing 1.
Referring to fig. 1, the metal casing 1 is made of magnetic conductive material and can be used for generating a magnetic sealing effect on the permanent magnet 2, in addition, the metal casing 1 has a circular wall 10, the circular wall 10 has an inner peripheral wall 11 and an outer peripheral wall 12 opposite to each other, a stator 13 is arranged in the metal casing 1, the stator 1 has a winding assembly 131, and the stator 13 can be combined with an axis 14 to form a ceiling fan, the axis 14 is used for being fixed at a predetermined position such as a ceiling; alternatively, the hub 14 may be combined with a rotor (not shown) to form a fan.
Referring to fig. 1, the permanent magnet 2 is combined with the inner peripheral wall 11 of the metal shell 1, the permanent magnet 2 is annularly disposed on the outer periphery of the stator 13, and the permanent magnet 2 is aligned with the stator 13 and forms an air gap G with the stator 13, when the winding assembly 131 of the stator 13 is energized, the winding assembly 131 can generate a magnetic field, and the magnetic lines of force of the permanent magnet 2 enter the magnetic field of the winding assembly 131 through the air gap G to form a magnetic cross-linking effect, so as to drive the metal shell 1 to rotate.
Referring to fig. 1, the at least one magnetic sealing ring 3 is annularly disposed on the annular wall 10, in this embodiment, the number of the magnetic sealing ring 3 is one, the magnetic sealing ring 3 is annularly arranged on the outer peripheral wall 12 of the metal shell 1, the permanent magnet 2 and the magnetic sealing ring 3 are all formed on a rotor R, so that the annular wall 10 of the metal shell 1 is positioned between the magnetic sealing ring 3 and the permanent magnet 2, the magnetic sealing ring 3 is radially and oppositely positioned on the permanent magnet 2, wherein, the magnetic sealing ring 3 is made of magnetic conductive material, when the permanent magnet 2 does not generate magnetic linkage with the winding assembly 131 to cause magnetic leakage, the magnetic sealing ring 3 can conduct magnetic action to the leakage flux, so that the leakage flux can form a closed magnetic circuit through the magnetic sealing ring 3, and the leakage flux and the winding assembly 131 are prevented from forming high-frequency resonance, so that the high-frequency noise generated when the motor rotates to actuate is reduced.
Referring to fig. 1 and 2, it is particularly described that the magnetic seal ring 3 and the metal shell 1 may be tightly fitted, welded or screwed, in addition, the thickness of the metal shell 1 is less than or equal to 3mm and is made by stamping, and the total thickness of the metal shell 1 and the magnetic seal ring 3 is greater than 3mm and less than or equal to 6mm, thereby avoiding the overall weight of the outer rotor motor from being too large.
Referring to fig. 1 and 2, according to the above structure, the magnetic sealing ring 3 is annularly disposed on the outer peripheral wall 12 of the metal casing 1, and the metal casing 1 and the magnetic sealing ring 3 can perform a magnetic conduction function on the magnetic leakage flux of the permanent magnet 2 that does not generate a magnetic flux linkage with the winding assembly 131, so that the metal casing 1 and the magnetic sealing ring 3 provide two-layer magnetic sealing function, and further improve the magnetic sealing effect, and the thickness of the metal casing 1 can be reduced by the arrangement of the magnetic sealing ring 3, so as to reduce the overall weight of the large ceiling fan, and simultaneously avoid the problem that the metal casing 1 is difficult to be punched.
Referring to fig. 3, a second embodiment of the external rotor motor of the present invention is substantially the same as the first embodiment, and the main differences are as follows: the metal shell 1 of the second embodiment of the present invention has a top wall 15, the magnetic sealing ring 3 has a first extension portion 31, the first extension portion 31 extends toward the top wall 15 of the metal shell 1, and the first extension portion 31 axially shields the permanent magnet 2. So, this first extension 31 can carry out the magnetic conduction effect to this magnetic leakage in the axial, make this seal magnetic ring 3 in radial and axial homoenergetic to this permanent magnet 2 production seal magnetic effect, borrow this, this metal casing 1 and this seal magnetic ring 3 provide two-layer seal magnetic effect, and then can improve and seal magnetic effect, and through this setting of sealing magnetic ring 3, can reduce this metal casing 1's thickness, and then can alleviate the whole weight of this large-scale ceiling fan, can avoid this metal casing 1 to be difficult to the problem of stamping process simultaneously.
Referring to fig. 4, a third embodiment of the external rotor motor of the present invention is substantially the same as the second embodiment, and the main differences are as follows: the metal shell 1 of the third embodiment of the present invention has a bottom plate 16 radially extending from the ring wall 10, the magnetic seal ring 3 has a second extending portion 32, the second extending portion 32 radially extends toward the bottom plate 16 of the metal shell 1, and the second extending portion 32 has a through hole 321, the through hole 321 is penetrated by a fixing member 4. So, can make this seal magnetic ring 3 fixed set up in this metal casing 1, increase the steadiness that its combines, make this seal magnetic ring 3 in radial and axial homoenergetic to this permanent magnet 2 production seal the magnetic action, borrow this metal casing 1 and this seal magnetic ring 3 provide two-layer seal magnetic action, and then can improve and seal the magnetic effect, and through this setting of sealing magnetic ring 3, can reduce the thickness of this metal casing 1, and then can alleviate the whole weight of this large-scale ceiling fan, can avoid this metal casing 1 to be difficult to the problem of punching press processing simultaneously.
Referring to fig. 5, a fourth embodiment of the external rotor motor of the present invention is substantially the same as the first embodiment, and the main differences are as follows: the metal shell 1 of the fourth embodiment of the present invention has a bottom plate 16 radially extending from the ring wall 10, the magnetic seal ring 3 has a second extending portion 32, the second extending portion 32 radially extends toward the bottom plate 16 of the metal shell 1, the second extending portion 32 has a through hole 321, and the through hole 321 is penetrated by a fixing member 4. So, can make this seal magnetic ring 3 fixed set up in this metal casing 1, increase the steadiness that its combines, ensure this seal magnetic ring 3 in radial to this permanent magnet 2 production seal magnetic effect, borrow this metal casing 1 and this seal magnetic ring 3 provide two-layer seal magnetic effect, and then can improve and seal magnetic effect, and through this setting of sealing magnetic ring 3, can reduce this metal casing 1's thickness, and then can alleviate the whole weight of this large-scale ceiling fan, can avoid this metal casing 1 to be difficult to the problem of stamping process simultaneously.
Referring to fig. 6, a fifth embodiment of the external rotor motor of the present invention is substantially the same as the first embodiment, and the main differences are as follows: the magnet sealing ring 3 of the fifth embodiment of the present invention is annularly disposed on the inner peripheral wall 11 of the metal casing 1, and the permanent magnet 2 is bonded to the inner wall 3a of the magnet sealing ring 3, so that the magnet sealing ring 3 is located between the permanent magnet 2 and the annular wall 10 of the metal casing 1. So, this metal casing 1 and this seal magnetic ring 3 homoenergetic carry out the magnetic conduction effect to this magnetic leakage, borrow this metal casing 1 and this seal magnetic ring 3 and provide two-layer magnetism effect of sealing, and then can improve and seal the magnetism effect to through this setting of sealing magnetic ring 3, can reduce this metal casing 1's thickness, and then can alleviate the whole weight of this large-scale ceiling fan, can avoid this metal casing 1 to be difficult to the problem of punching press processing simultaneously. In addition, the external rotor motor of the present invention may further include a positioning element 5, the positioning element 5 is located in the metal casing 1, the positioning element 5 may be, for example, a plurality of blocks or a ring, the positioning element 5 is combined at a connection position of the inner peripheral wall 11 and the top wall 15, the permanent magnet 2 and the magnetic seal ring 3 axially abut against the positioning element 5, thereby, when the permanent magnet 2 is assembled, the positioning element 5 may be used for positioning and combining the permanent magnet 2, and it may be ensured that the permanent magnet 2 is positioned at a correct position, so that the permanent magnet 2 may be aligned to the stator 13 in a radial direction.
Referring to fig. 7, a sixth embodiment of the external rotor motor of the present invention is substantially the same as the fifth embodiment, and the main differences are as follows: the positioning member 5 of the sixth embodiment of the present invention is selectively connected to the top wall 15, so that a gap D is formed between the positioning member 5 and the inner peripheral wall 11, and the magnetic seal ring 3 can extend to the gap D, thereby increasing the range of the magnetic seal ring 3 generating the magnetic seal effect on the permanent magnet 2 in the radial direction.
Referring to fig. 8, a seventh embodiment of the external rotor motor of the present invention is substantially the same as the fifth embodiment, and the main differences are as follows: the magnet sealing ring 3 of the seventh embodiment of the present invention has a first extending portion 31, and the first extending portion 31 extends toward the top of the permanent magnet 2, for example, but not limited thereto, the embodiment can also be provided with the positioning member 5 located in the metal housing 1, and the first extending portion 31 is connected between the permanent magnet 2 and the positioning member 5, so that the first extending portion 31 can axially shield the permanent magnet 2. So, this first extension 31 can carry out the magnetic conduction effect to this magnetic leakage in the axial, make this seal magnetic ring 3 in radial and axial homoenergetic to this permanent magnet 2 production seal magnetic effect, borrow this, this metal casing 1 and this seal magnetic ring 3 provide two-layer seal magnetic effect, and then can improve and seal magnetic effect, and through this setting of sealing magnetic ring 3, can reduce this metal casing 1's thickness, and then can alleviate the whole weight of this large-scale ceiling fan, can avoid this metal casing 1 to be difficult to the problem of stamping process simultaneously.
Referring to fig. 9, an eighth embodiment of the external rotor motor of the present invention is substantially the same as the fourth embodiment, and the main differences are as follows: the annular wall 10 of the eighth embodiment of the present invention is bent along the top of the permanent magnet 2 to form a shoulder 17, the shoulder 17 is located between the annular wall 10 and the top wall 15, the shoulder 17 can be used for positioning and combining the permanent magnet 2, so as to ensure that the permanent magnet 2 is positioned at the correct position, so that the permanent magnet 2 can be aligned with the stator 13 in the radial direction, and meanwhile, the shoulder 17 can also axially shield the permanent magnet 2, so as to provide an axial magnetic sealing function. In addition, the magnetic sealing ring 3 does not have the second extending portion 32 as shown in fig. 5, and the magnetic sealing ring 3 is selected to be tightly fitted or adhesively bonded to the outer circumferential wall 12 of the metal shell 1, so that the magnetic sealing ring 3 does not need to be locked to the bottom plate 16 of the metal shell 1, and thus, the operation time for assembling the external rotor motor can be further saved.
Referring to fig. 10, a ninth embodiment of the external rotor motor of the present invention is substantially the same as the eighth embodiment, and the main differences are as follows: the number of the magnetic sealing rings 3 of the ninth embodiment of the present invention is two, wherein one of the magnetic sealing rings 3 is annularly disposed on the outer peripheral wall 12 of the metal casing 1, the other one of the magnetic sealing rings 3 ' is annularly disposed on the outer wall 3b of the one of the magnetic sealing rings 3, and the two magnetic sealing rings 3, 3 ' are both disposed outside the annular wall 10, so that the metal casing 1, the permanent magnet 2, the one of the magnetic sealing rings 3, and the other one of the magnetic sealing rings 3 ' are all formed on the rotor R. In detail, one of the magnetic sealing rings 3 has a first extending portion 31, the first extending portion 31 extends toward the shoulder 17 of the metal casing 1, the other magnetic sealing ring 3 ' has a radial extending portion 31 ', the radial extending portion 31 ' extends toward the first extending portion 31 of the one magnetic sealing ring 3, the first extending portion 31 and the other magnetic sealing ring 3 ' are sequentially stacked on the shoulder 17, so as to ensure that the axial height of the outer rotor motor is not increased, and at the same time, one of the magnetic sealing rings 3 and the other magnetic sealing ring 3 ' can axially shield the permanent magnet 2 to provide an axial magnetic sealing function, and the other magnetic sealing ring 3 ' is radially opposite to the permanent magnet 2 and the one magnetic sealing ring 3, the other magnetic sealing ring 3 ' is made of a magnetic conductive material; therefore, the metal shell 1, one of the magnetic sealing rings 3 and the other magnetic sealing ring 3' provide three-layer magnetic sealing effect, and the magnetic sealing effect can be further improved.
Specifically, one of the magnetic sealing rings 3 may be disposed in the metal casing 1, and the other magnetic sealing ring 3' may be disposed outside the metal casing 1; or one of the magnetic sealing rings 3 and the other magnetic sealing ring 3' can be arranged in the metal shell 1 at the same time; or one of the magnetic sealing rings 3 and the other magnetic sealing ring 3 ' may be disposed outside the metal casing 1 at the same time, and the order of the positions among the metal casing 1, the one of the magnetic sealing rings 3 and the other magnetic sealing ring 3 ' is not limited in the present invention, and in this embodiment, the one of the magnetic sealing rings 3 and the other magnetic sealing ring 3 ' are preferably selectively disposed outside the metal casing 1, thereby further improving the processing convenience.
In summary, in the outer rotor motor of the present invention, the at least one sealing magnetic ring is located between the permanent magnet and the metal casing, or the annular wall is located between the at least one sealing magnetic ring and the permanent magnet, so that the metal casing and the at least one sealing magnetic ring can simultaneously conduct a magnetic conduction action to the magnetic leakage flux of the permanent magnet that does not generate a magnetic interlinkage action with the winding assembly, thereby the metal casing and the at least one sealing magnetic ring can provide at least two layers of sealing magnetic actions, and further improve the sealing magnetic effect.
Claims (19)
1. An outer rotor motor, comprising:
the metal shell is made of magnetic conductive materials and provided with an annular wall, and a stator is arranged in the metal shell;
a permanent magnet located in the metal shell and arranged around the periphery of the stator; and
at least one sealing ring is annularly arranged on the annular wall, and the at least one sealing ring is positioned between the permanent magnet and the metal shell, or the annular wall is positioned between the at least one sealing ring and the permanent magnet.
2. The external rotor motor as claimed in claim 1, wherein the at least one magnetic seal ring is disposed around an outer circumferential wall of the annular wall of the metal casing, and the permanent magnets are bonded to an inner circumferential wall of the annular wall of the metal casing.
3. The external rotor motor as claimed in claim 2, wherein the metal casing has a top wall, the at least one magnetic sealing ring has a first extension portion, the first extension portion extends toward the top wall of the metal casing, and the first extension portion axially shields the permanent magnets.
4. The external rotor motor as claimed in claim 3, wherein the metal casing has a bottom plate extending radially from the annular wall, the at least one magnetic sealing ring has a second extending portion extending radially toward the bottom plate of the metal casing, the second extending portion has a through hole, and the through hole is formed through by a fixing member.
5. The external rotor motor as claimed in claim 1, wherein the at least one magnetic seal ring is disposed around an inner peripheral wall of the annular wall of the metal casing, and the permanent magnet is coupled to an inner wall of the at least one magnetic seal ring.
6. The external rotor motor as claimed in claim 5, wherein the metal casing has a top wall, and the at least one magnetic sealing ring has a first extension portion extending toward the top wall of the metal casing, the first extension portion axially shielding the permanent magnets.
7. The external rotor motor of claim 1, wherein the at least one magnetic sealing ring is made of a magnetic conductive material.
8. The external rotor motor as claimed in claim 1, wherein the at least one magnetic seal ring is tightly fitted to the metal casing.
9. The external rotor motor as claimed in claim 1, wherein the at least one magnetic seal ring is welded to the metal casing.
10. The external rotor motor of claim 1, wherein the at least one magnetic seal ring is screwed with the metal casing.
11. The external rotor motor as claimed in claim 1, wherein the metal casing has a thickness of 3mm or less and is formed by stamping.
12. The external rotor motor as claimed in claim 1, wherein the total thickness of the metal casing and the at least one magnetic sealing ring is greater than 3mm and less than or equal to 6 mm.
13. The external rotor motor as claimed in claim 1, wherein the metal casing has a bottom plate extending radially from the annular wall, the at least one magnetic sealing ring has a second extending portion extending radially toward the bottom plate of the metal casing, the second extending portion has a through hole, and the through hole is penetrated by a fixing member.
14. The external rotor motor as claimed in claim 2, further comprising a positioning member disposed in the metal casing, wherein the permanent magnet is positioned and coupled to the positioning member.
15. The external rotor motor of claim 14, wherein a gap is formed between the positioning member and the inner peripheral wall, and the at least one magnetic seal ring extends to the gap.
16. The external rotor motor of claim 14, wherein the at least one magnetic sealing ring has a first extension portion extending toward the top of the permanent magnet, the first extension portion being connected between the permanent magnet and the positioning member.
17. The external rotor motor as claimed in claim 3, wherein the number of the magnetic sealing rings is two, one of the magnetic sealing rings is disposed around the outer peripheral wall of the metal casing, and the other magnetic sealing ring is disposed around the outer peripheral wall of the one magnetic sealing ring.
18. The external rotor motor as claimed in claim 17, wherein the annular wall of the metal casing is bent along the top of the permanent magnet to form a shoulder between the annular wall and the top wall, the shoulder for positioning and engaging the permanent magnet.
19. The external rotor motor as claimed in claim 17 or 18, wherein the one of the magnetic seal rings has a first extension extending radially toward the permanent magnet, and the other of the magnetic seal rings has a radial extension extending toward the first extension of the one of the magnetic seal rings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW107145476A TWI689155B (en) | 2018-12-17 | 2018-12-17 | Outer-rotor motor |
| TW107145476 | 2018-12-17 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111327132A true CN111327132A (en) | 2020-06-23 |
Family
ID=70767325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811594498.3A Pending CN111327132A (en) | 2018-12-17 | 2018-12-25 | External rotor motor |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111327132A (en) |
| TW (1) | TWI689155B (en) |
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| JP6540038B2 (en) * | 2015-01-22 | 2019-07-10 | 株式会社デンソー | Outer rotor type rotating electric machine |
| TWI595732B (en) * | 2016-05-30 | 2017-08-11 | 建準電機工業股份有限公司 | Motor and fan |
| TWI602384B (en) * | 2016-07-28 | 2017-10-11 | 建準電機工業股份有限公司 | Motor, fan and rotor thereof |
| TWI591938B (en) * | 2016-09-29 | 2017-07-11 | 建準電機工業股份有限公司 | Outer rotor motor and stator assembly thereof |
| CN108718146B (en) * | 2018-05-15 | 2020-03-31 | 江苏大学 | A-shaped modular stator bearingless outer rotor motor |
-
2018
- 2018-12-17 TW TW107145476A patent/TWI689155B/en active
- 2018-12-25 CN CN201811594498.3A patent/CN111327132A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5774302A (en) * | 1981-09-07 | 1998-06-30 | Papst Licensing, Gmbh | Spin drive motor for a disk storage device |
| US20080232983A1 (en) * | 2007-03-23 | 2008-09-25 | Nidec Corporation | Motor, fan and manufacturing method of the same |
| CN103248186A (en) * | 2012-02-06 | 2013-08-14 | 建准电机工业股份有限公司 | Power generating motor |
| CN207304187U (en) * | 2017-06-02 | 2018-05-01 | 徐享渊 | External-rotating permanent magnet motor structure |
Also Published As
| Publication number | Publication date |
|---|---|
| TW202025599A (en) | 2020-07-01 |
| TWI689155B (en) | 2020-03-21 |
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Application publication date: 20200623 |
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