CN203942342U - The stator core of a kind of stator punching and application thereof and motor - Google Patents
The stator core of a kind of stator punching and application thereof and motor Download PDFInfo
- Publication number
- CN203942342U CN203942342U CN201420310834.8U CN201420310834U CN203942342U CN 203942342 U CN203942342 U CN 203942342U CN 201420310834 U CN201420310834 U CN 201420310834U CN 203942342 U CN203942342 U CN 203942342U
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- Prior art keywords
- yoke portion
- punching
- root
- tooth portion
- yoke
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000004080 punching Methods 0.000 title claims abstract description 140
- 238000004804 winding Methods 0.000 claims abstract description 35
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 6
- 238000009434 installation Methods 0.000 abstract description 8
- 230000015572 biosynthetic process Effects 0.000 abstract description 5
- 238000010030 laminating Methods 0.000 abstract description 3
- 238000003475 lamination Methods 0.000 description 8
- 238000010276 construction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model discloses stator core and the motor of a kind of stator punching and application thereof, comprise some the first punchings and some the second punchings, the first punching and the second punching are circumferentially intervally arranged, it is characterized in that: the first described punching comprises the first yoke portion and the first tooth portion of stretching out from the first centre, yoke portion inner side, in the middle of the first tooth portion inner side, toward in, stretch out the first root, between the first yoke portion and the first tooth portion, form the first winding slot, the second described punching comprises the second yoke portion and the second tooth portion of stretching out from the second centre, yoke portion inner side, in the middle of the second yoke portion outside, stretch out outward the second root, between the second yoke portion and the second tooth portion, form the second winding slot, the first yoke portion and the second root are circumferentially spaced and are joined together to form outer yoke part, the first root and the second tooth portion are circumferentially spaced formation cavity, the medial surface of the first tooth portion is attached on the lateral surface of the second yoke portion, this stator laminating structure is simple, easy for installation, Distribution of Magnetic Field is even, operational efficiency is efficient.
Description
Technical field:
The utility model relates to stator core and the motor of a kind of stator punching and application thereof.
Background technology:
At present, the some teeth portion that in society, more widely used stator punchings comprise ring-shaped yoke portion and stretch out toward in from ring-shaped yoke portion inner side, between adjacent two tooth portions, form line embedding groove, but this stator punching and use the stator core that these stator punchings are made all to have following several problem: 1) coiling of coil windings is installed trouble, difficulty is large, and groove area utilance is low, affect the operational efficiency of motor; 2) Distribution of Magnetic Field is uneven, affects the operational efficiency of motor, and can produce noise.
Summary of the invention:
The purpose of this utility model is to provide stator core and the motor of a kind of stator punching and application thereof, and this stator laminating structure is simple, easy for installation, and Distribution of Magnetic Field is even, and operational efficiency is efficient; This stator core construction is simple, easy for installation, and operational efficiency is efficient, and cost is low; This electric machine structure is simple, easy for installation, and Distribution of Magnetic Field is even, and operation is efficient, and noise is little.
The purpose of this utility model is achieved by following technical proposals.
A kind of stator punching, comprise some the first punchings and some the second punchings, the first punching and the second punching are circumferentially intervally arranged, it is characterized in that: the first described punching comprises the first yoke portion and the first tooth portion of stretching out from the first centre, yoke portion inner side, in the middle of the first tooth portion inner side, toward in, stretch out the first root, between the first yoke portion and the first tooth portion, form the first winding slot, the second described punching comprises the second yoke portion and the second tooth portion of stretching out from the second centre, yoke portion inner side, in the middle of the second yoke portion outside, stretch out outward the second root, between the second yoke portion and the second tooth portion, form the second winding slot, the first yoke portion and the second root are circumferentially spaced and are joined together to form outer yoke part, the first root and the second tooth portion are circumferentially spaced formation cavity, the medial surface of the first tooth portion is attached on the lateral surface of the second yoke portion.
Between the first tooth portion described above and the first root, form recess, the end of the second yoke portion extends to recess the inside.
The second root described above separates the first winding slot of adjacent two the first punchings, and the first root separates the second winding slot of adjacent two the second punchings.
The second root both sides described above offer groove, and the end of the first yoke portion is extended with projection, and projection is nested in groove the inside, and the first yoke portion and the second root weld together.
The first punching described above and the quantity of the second punching are all 6, between the second yoke portion and the second tooth portion, offer magnet isolation tank.
A kind of stator core, comprise some stacked stator punchings that are installed together, every stator punching comprises some the first punchings and some the second punchings, the first punching and the second punching are circumferentially intervally arranged, it is characterized in that: the first described punching comprises the first yoke portion and the first tooth portion of stretching out from the first centre, yoke portion inner side, in the middle of the first tooth portion inner side, toward in, stretch out the first root, between the first yoke portion and the first tooth portion, form the first winding slot, the second described punching comprises the second yoke portion and the second tooth portion of stretching out from the second centre, yoke portion inner side, in the middle of the second yoke portion outside, stretch out outward the second root, between the second yoke portion and the second tooth portion, form the second winding slot, the first yoke portion and the second root are circumferentially spaced and are joined together to form outer yoke part, the first root and the second tooth portion are circumferentially spaced formation cavity, the medial surface of the first tooth portion is attached on the lateral surface of the second yoke portion.
Between the first tooth portion described above and the first root, form recess, the end of the second yoke portion extends to recess the inside, in the second root both sides, offers groove, and the end of the first yoke portion is extended with projection, and projection is nested in groove the inside.
The first yoke portion and the second root described above weld together, and the quantity of described the first punching and the second punching is all 6, between the second yoke portion and the second tooth portion, offer magnet isolation tank.
A kind of motor, comprise rotating shaft, rotor assembly, stator module and end cap, rotor assembly is arranged in rotating shaft, end cap comprises base plate and the cylinder extending axially out from bottom edge, stator module and cylinder link together and are nested in rotor assembly outside, in the middle of the base plate of end cap, toward in-draw, go out bearing pedestal, in bearing pedestal the inside, bearing is installed, shaft support is on the bearing of two end cap, described stator module comprise by some stator punchings stacked be installed together the stator core that forms and reel be arranged on the coil windings on stator core, every stator punching comprises some the first punchings and some the second punchings, the first punching and the second punching are circumferentially intervally arranged, it is characterized in that: the first described punching comprises the first yoke portion and the first tooth portion of stretching out from the first centre, yoke portion inner side, in the middle of the first tooth portion inner side, toward in, stretch out the first root, between the first yoke portion and the first tooth portion, form the first winding slot, the second described punching comprises the second yoke portion and the second tooth portion of stretching out from the second centre, yoke portion inner side, in the middle of the second yoke portion outside, stretch out outward the second root, between the second yoke portion and the second tooth portion, form the second winding slot, the first yoke portion and the second root are circumferentially spaced and are joined together to form outer yoke part, the first root and the second tooth portion are circumferentially spaced formation cavity, the medial surface of the first tooth portion is attached on the lateral surface of the second yoke portion.
Between the first tooth portion described above and the first root, form recess, the end of the second yoke portion extends to recess the inside, in the second root both sides, offers groove, and the end of the first yoke portion is extended with projection, and projection is nested in groove the inside.
The utility model compared with prior art, has following effect:
1) this stator laminating structure is simple, easy for installation, and Distribution of Magnetic Field is even, and operational efficiency is efficient;
2) between the first tooth portion and the first root, form recess, the end of the second yoke portion extends to recess the inside, and the second root separates the first winding slot of adjacent two the first punchings, the first root separates the second winding slot of adjacent two the second punchings, simple in structure, coiling is convenient, and efficiency is high;
3) the second root both sides offer groove, and the end of the first yoke portion is extended with projection, and projection is nested in groove the inside, and the first yoke portion and the second root weld together, simple in structure, easy for installation, and solid and reliable, and cost is low;
4) between the second yoke portion and the second tooth portion, offer magnet isolation tank, guiding magnetic wire distributes, and makes Distribution of Magnetic Field even, improves its operational efficiency;
5) this stator core construction is simple, easy for installation, and operational efficiency is efficient, and cost is low;
6) this electric machine structure is simple, easy for installation, and Distribution of Magnetic Field is even, and operation is efficient, and noise is little.
Accompanying drawing explanation:
Fig. 1 is the stereogram of the utility model the first punching;
Fig. 2 is the stereogram of the utility model the second punching;
Fig. 3 is the stereogram of the utility model stator punching;
Fig. 4 is A-A partial enlarged drawing in Fig. 3;
Fig. 5 is the stereogram of stator core in embodiment bis-;
Fig. 6 is the stereogram of the utility model the first punching lamination;
Fig. 7 is the stereogram of the second punching lamination in embodiment bis-;
Fig. 8 is the stereogram of stator core in embodiment tri-;
Fig. 9 is the stereogram of the utility model the 3rd punching;
Figure 10 is the stereogram of stator punching in embodiment tri-;
Figure 11 is the stereogram of the second punching lamination in embodiment tri-;
Figure 12 is the exploded view of Figure 11;
Figure 13 is the structure cutaway view of the utility model motor.
Embodiment:
Below by specific embodiment, also by reference to the accompanying drawings the utility model is described in further detail.
Embodiment mono-: as Fig. 1, Fig. 2, shown in Fig. 3 and Fig. 4, the utility model is a kind of stator punching, comprise some the first punchings 1 and some the second punchings 2, the first punching 1 and the second punching 2 are circumferentially intervally arranged, the first described punching 1 comprises the first yoke portion 11 and the first tooth portion 12 of stretching out from the first yoke portion 11 centres, inner sides, in the middle of the first tooth portion 12 inner sides, toward in, stretch out the first root 13, between the first yoke portion 11 and the first tooth portion 12, form the first winding slot 14, the second described punching 2 comprises that the second yoke portion 21 is from the second middle the second tooth portion 22 of stretching out in yoke portion 21 inner sides, in the middle of the second yoke portion 21 outsides, stretch out outward the second root 23, between the second yoke portion 21 and the second tooth portion 22, form the second winding slot 24, the first yoke portion 11 and the second root 23 are circumferentially spaced and are joined together to form outer yoke part 31, the first root 13 and the second tooth portion 22 are circumferentially spaced and form cavity 32, the medial surface of the first tooth portion 12 is attached on the lateral surface of the second yoke portion 21.The end that forms recess 15, the second yoke portions 21 between the first tooth portion 12 and the first root 13 extends to recess 15 the insides.The second root 23 separates the first winding slot 14 of adjacent two the first punchings 1, and the first root 13 separates the second winding slot 24 of adjacent two the second punchings 2.The end that offers groove 230, the first yoke portions 11 in the second root 23 both sides is extended with projection 111, and projection 111 is nested in groove 230 the insides, and the first yoke portion 11 and the second root 23 weld together.The quantity of the first punching 1 and the second punching 2 is all 6, between the second yoke portion 21 and the second tooth portion 22, offers magnet isolation tank 25.
Embodiment bis-: as shown in Figures 1 to 7, the utility model is a kind of stator core, comprise some stacked stator punchings that are installed together, every stator punching comprises some the first punchings 1 and some the second punchings 2, the first punching 1 and the second punching 2 are circumferentially intervally arranged, some the first punchings 1 stacked together form the first punching lamination 101, and some the second punchings 2 stacked together form the second punching lamination 102.The first described punching 1 comprises the first yoke portion 11 and the first tooth portion 12 of stretching out from the first yoke portion 11 centres, inner sides, in the middle of the first tooth portion 12 inner sides, toward in, stretch out the first root 13, between the first yoke portion 11 and the first tooth portion 12, form the first winding slot 14, the second described punching 2 comprises that the second yoke portion 21 is from the second middle the second tooth portion 22 of stretching out in yoke portion 21 inner sides, in the middle of the second yoke portion 21 outsides, stretch out outward the second root 23, between the second yoke portion 21 and the second tooth portion 22, form the second winding slot 24, the first yoke portion 11 and the second root 23 are circumferentially spaced and are joined together to form outer yoke part 31, the first root 13 and the second tooth portion 22 are circumferentially spaced and form cavity 32, the medial surface of the first tooth portion 12 is attached on the lateral surface of the second yoke portion 21.The end that forms recess 15, the second yoke portions 21 between the first tooth portion 12 and the first root 13 extends to recess 15 the insides, and the end that offers groove 230, the first yoke portions 11 in the second root 23 both sides is extended with projection 111, and projection 111 is nested in groove 230 the insides.
Embodiment tri-: as shown in Figure 1 to Figure 4, shown in Fig. 6 and Fig. 8 to Figure 12, the utility model is a kind of stator core, and the difference of embodiment bis-is: between the second punching lamination 102, be provided with some the 3rd punchings 9, the 3rd root 91 in the middle of the 3rd described punching 9 comprises, be positioned at left punching 92 and the right punching 93 of the 3rd root 91 medial end both sides, in left punching 92 and right punching 93, be all provided with the 3rd winding slot 94, the three roots 91, left punching 92 is separated from one another with right punching 93 and is combined into three punching 9 identical with the second punching 2 shape sizes.Both ends and mid portion at the second punching lamination 102 are respectively equipped with some the second punchings 2 stacked together, at the both ends of the second punching lamination 102 and the part between centre is stacked that some the 3rd punchings 9 are installed.The first yoke portion 11 and the 3rd root 91 are circumferentially spaced and are joined together to form outer yoke part 21, the first roots 13, left punching 92, the 3rd root 91 and right punching 93 and be circumferentially spaced formation cavity 32.The medial surface of the first tooth portion 12 is attached on the lateral surface of left punching 92 and right punching 93.The 3rd root 91 separates the first winding slot 14 of adjacent two the first punchings 1, and the first root 13 separates the 3rd winding slot 94 of adjacent two the 3rd punchings 9.The end that offers draw-in groove 910, the first yoke portions 11 in the 3rd root 91 both sides is extended with projection 111, and projection 111 is nested in draw-in groove 910 the insides, and the first yoke portion 11 and the 3rd root 91 weld together.
Embodiment tetra-: as shown in Fig. 1 to Fig. 7 and Figure 13, the utility model is a kind of motor, comprise rotating shaft 4, rotor assembly 5, stator module 6 and end cap 7, rotor assembly 5 is arranged in rotating shaft 4, end cap 7 comprises base plate 71 and the cylinder 72 extending axially out from base plate 71 edges, stator module 6 links together and is nested in rotor assembly 5 outsides with cylinder 72, in the middle of the base plate 71 of end cap 7, toward in-draw, go out bearing pedestal 73, in bearing pedestal 73 the insides, bearing 8 is installed, rotating shaft 4 is bearing on the bearing 8 of two end cap 7, described stator module 6 comprise by some stator punchings stacked be installed together the stator core 61 forming and reel be arranged on the coil windings on stator core 61, every stator punching comprises some the first punchings 1 and some the second punchings 2, the first punching 1 and the second punching 2 are circumferentially intervally arranged, the first described punching 1 comprises the first yoke portion 11 and the first tooth portion 12 of stretching out from the first yoke portion 11 centres, inner sides, in the middle of the first tooth portion 12 inner sides, toward in, stretch out the first root 13, between the first yoke portion 11 and the first tooth portion 12, form the first winding slot 14, the second described punching 2 comprises that the second yoke portion 21 is from the second middle the second tooth portion 22 of stretching out in yoke portion 21 inner sides, in the middle of the second yoke portion 21 outsides, stretch out outward the second root 23, between the second yoke portion 21 and the second tooth portion 22, form the second winding slot 24, the first yoke portion 11 and the second root 23 are circumferentially spaced and are joined together to form outer yoke part 31, the first root 13 and the second tooth portion 22 are circumferentially spaced and form cavity 32, the medial surface of the first tooth portion 12 is attached on the lateral surface of the second yoke portion 21.The end that forms recess 15, the second yoke portions 21 between the first tooth portion 12 and the first root 13 extends to recess 15 the insides, and the end that offers groove 230, the first yoke portions 11 in the second root 23 both sides is extended with projection 111, and projection 111 is nested in groove 230 the insides.
Above embodiment is better embodiment of the present invention; but embodiments of the present invention are not limited to this; other are any does not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitute, combination, simplify; be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (10)
1. a stator punching, comprise some the first punchings (1) and some the second punchings (2), the first punching (1) and the second punching (2) are circumferentially intervally arranged, it is characterized in that: described the first punching (1) comprises the first yoke portion (11) and the first tooth portion (12) of stretching out from the first centre, yoke portion (11) inner side, in the middle of the first tooth portion (12) inner side, toward in, stretch out the first root (13), between the first yoke portion (11) and the first tooth portion (12), form the first winding slot (14), described the second punching (2) comprises that the second yoke portion (21) is from the second middle the second tooth portion (22) of stretching out in yoke portion (21) inner side, in the middle of the second yoke portion (21) outside, stretch out outward the second root (23), between the second yoke portion (21) and the second tooth portion (22), form the second winding slot (24), the first yoke portion (11) and the second root (23) are circumferentially spaced and are joined together to form outer yoke part (31), the first root (13) and the second tooth portion (22) are circumferentially spaced and form cavity (32), the medial surface of the first tooth portion (12) is attached on the lateral surface of the second yoke portion (21).
2. a kind of stator punching according to claim 1, is characterized in that: between the first tooth portion (12) and the first root (13), form recess (15), the end of the second yoke portion (21) extends to recess (15) the inside.
3. a kind of stator punching according to claim 1 and 2, it is characterized in that: the second root (23) separates first winding slot (14) of adjacent two the first punchings (1), the first root (13) separates second winding slot (24) of adjacent two the second punchings (2).
4. a kind of stator punching according to claim 3, it is characterized in that: in the second root (23) both sides, offer groove (230), the end of the first yoke portion (11) is extended with projection (111), projection (111) is nested in groove (230) the inside, and the first yoke portion (11) and the second root (23) weld together.
5. a kind of stator punching according to claim 4, it is characterized in that: the quantity of described the first punching (1) and the second punching (2) is all 6, between the second yoke portion (21) and the second tooth portion (22), offer magnet isolation tank (25).
6. an application rights requires the stator core of any one stator punching described in 1 to 5, comprise some stacked stator punchings that are installed together, every stator punching comprises some the first punchings (1) and some the second punchings (2), the first punching (1) and the second punching (2) are circumferentially intervally arranged, it is characterized in that: described the first punching (1) comprises the first yoke portion (11) and the first tooth portion (12) of stretching out from the first centre, yoke portion (11) inner side, in the middle of the first tooth portion (12) inner side, toward in, stretch out the first root (13), between the first yoke portion (11) and the first tooth portion (12), form the first winding slot (14), described the second punching (2) comprises that the second yoke portion (21) is from the second middle the second tooth portion (22) of stretching out in yoke portion (21) inner side, in the middle of the second yoke portion (21) outside, stretch out outward the second root (23), between the second yoke portion (21) and the second tooth portion (22), form the second winding slot (24), the first yoke portion (11) and the second root (23) are circumferentially spaced and are joined together to form outer yoke part (31), the first root (13) and the second tooth portion (22) are circumferentially spaced and form cavity (32), the medial surface of the first tooth portion (12) is attached on the lateral surface of the second yoke portion (21).
7. a kind of stator core according to claim 6, it is characterized in that: between the first tooth portion (12) and the first root (13), form recess (15), the end of the second yoke portion (21) extends to recess (15) the inside, in the second root (23) both sides, offer groove (230), the end of the first yoke portion (11) is extended with projection (111), and projection (111) is nested in groove (230) the inside.
8. according to a kind of stator core described in claim 6 or 7, it is characterized in that: the first yoke portion (11) and the second root (23) weld together, the quantity of described the first punching (1) and the second punching (2) is all 6, between the second yoke portion (21) and the second tooth portion (22), offers magnet isolation tank (25).
9. an application rights requires the motor of any one stator punching described in 1 to 5, comprise rotating shaft (4), rotor assembly (5), stator module (6) and end cap (7), rotor assembly (5) is arranged in rotating shaft (4), end cap (7) comprises base plate (71) and the cylinder (72) extending axially out from base plate (71) edge, stator module (6) links together with cylinder (72) and is nested in rotor assembly (5) outside, in the middle of the base plate (71) of end cap (7), toward in-draw, go out bearing pedestal (73), in bearing pedestal (73) the inside, bearing (8) is installed, rotating shaft (4) is bearing on the bearing (8) of two end cap (7), described stator module (6) comprises by the stacked stator core (61) and the coiling that form of being installed together of some stator punchings and is arranged on the coil windings on stator core (61), every stator punching comprises some the first punchings (1) and some the second punchings (2), the first punching (1) and the second punching (2) are circumferentially intervally arranged, it is characterized in that: described the first punching (1) comprises the first yoke portion (11) and the first tooth portion (12) of stretching out from the first centre, yoke portion (11) inner side, in the middle of the first tooth portion (12) inner side, toward in, stretch out the first root (13), between the first yoke portion (11) and the first tooth portion (12), form the first winding slot (14), described the second punching (2) comprises that the second yoke portion (21) is from the second middle the second tooth portion (22) of stretching out in yoke portion (21) inner side, in the middle of the second yoke portion (21) outside, stretch out outward the second root (23), between the second yoke portion (21) and the second tooth portion (22), form the second winding slot (24), the first yoke portion (11) and the second root (23) are circumferentially spaced and are joined together to form outer yoke part (31), the first root (13) and the second tooth portion (22) are circumferentially spaced and form cavity (32), the medial surface of the first tooth portion (12) is attached on the lateral surface of the second yoke portion (21).
10. a kind of motor according to claim 9, it is characterized in that: between the first tooth portion (12) and the first root (13), form recess (15), the end of the second yoke portion (21) extends to recess (15) the inside, in the second root (23) both sides, offer groove (230), the end of the first yoke portion (11) is extended with projection (111), and projection (111) is nested in groove (230) the inside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420310834.8U CN203942342U (en) | 2014-06-11 | 2014-06-11 | The stator core of a kind of stator punching and application thereof and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420310834.8U CN203942342U (en) | 2014-06-11 | 2014-06-11 | The stator core of a kind of stator punching and application thereof and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203942342U true CN203942342U (en) | 2014-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420310834.8U Expired - Lifetime CN203942342U (en) | 2014-06-11 | 2014-06-11 | The stator core of a kind of stator punching and application thereof and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203942342U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112366839A (en) * | 2020-09-22 | 2021-02-12 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator and motor |
| CN113036956A (en) * | 2019-12-25 | 2021-06-25 | 广东美的白色家电技术创新中心有限公司 | Stator tooth punching sheet, motor stator and motor |
| CN113679099A (en) * | 2021-09-08 | 2021-11-23 | 湖北中烟工业有限责任公司 | Preparation device of cavity composite filter stick |
-
2014
- 2014-06-11 CN CN201420310834.8U patent/CN203942342U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113036956A (en) * | 2019-12-25 | 2021-06-25 | 广东美的白色家电技术创新中心有限公司 | Stator tooth punching sheet, motor stator and motor |
| CN112366839A (en) * | 2020-09-22 | 2021-02-12 | 珠海格力节能环保制冷技术研究中心有限公司 | Stator and motor |
| CN113679099A (en) * | 2021-09-08 | 2021-11-23 | 湖北中烟工业有限责任公司 | Preparation device of cavity composite filter stick |
| CN113679099B (en) * | 2021-09-08 | 2023-11-03 | 湖北中烟工业有限责任公司 | Preparation device of cavity composite filter stick |
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