CN210123915U - Permanent magnet motor rotor structure - Google Patents
Permanent magnet motor rotor structure Download PDFInfo
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- CN210123915U CN210123915U CN201921108466.8U CN201921108466U CN210123915U CN 210123915 U CN210123915 U CN 210123915U CN 201921108466 U CN201921108466 U CN 201921108466U CN 210123915 U CN210123915 U CN 210123915U
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Abstract
The utility model discloses a permanent-magnet machine rotor structure, include: the rotor comprises a rotating shaft, magnetic steel, a rotor core, a magnetic steel fixing piece and a rotor sheath, wherein a through hole is formed in the center of the rotor core, the cross section of the rotor core is in a regular polygon shape, a magnetic isolation groove is formed in the periphery of the rotor core at the junction of the side edges, the magnetic steel fixing piece is partially filled in the magnetic isolation groove, the magnetic steel fixing piece is in a T shape, the magnetic steel is inserted into a cavity formed by the adjacent two T-shaped magnetic steel fixing pieces and the surface of the rotor core, the rotating shaft is pressed into the through hole in the center of the rotor core, and the magnetic steel; the rotor sheath is cylindrical, one side of the rotor sheath is provided with a closing-in which is preset and is closed towards the circle center, and the closing-in is annular; the rotor sheath is sleeved outside the rotor core, one side of the closing-in is positioned at the shaft extension side, the other side of the rotor sheath is also folded towards the circle center, and the closing-in is annular. The magnetic flux leakage rate is low, materials are saved, and the working efficiency is high.
Description
Technical Field
The utility model relates to a permanent-magnet machine rotor structure belongs to the motor field.
Background
The existing small permanent magnet motor rotor adopts a magnetic cylinder structure, the magnetic cylinder structure is compared with an arched magnetic steel structure, the cost is high, the outside of the magnetic cylinder is directly exposed in an air gap, scraps generated by the rotor in the running process are directly applied to the air gap of the motor, and the motor is easy to generate noise. For the rotor adopting the surface-mounted structure magnetic steel, a rotor core can adopt a dovetail groove to fix the magnetic steel, the magnetic resistance of the junction of the magnetic steel is very small, and the magnetic flux leakage is serious. The straight-tube sheath applied externally needs glue for fixation, the working procedure is complex, the glue is troublesome to bond, and the quality is unstable.
Disclosure of Invention
An object of the utility model is to provide a permanent-magnet machine rotor structure that magnetic leakage rate is low, save material and work efficiency is high.
In order to achieve the above object, the utility model discloses a technical scheme is: a permanent magnet electric machine rotor structure comprising: the rotor comprises a rotating shaft, magnetic steel, a rotor core, a magnetic steel fixing piece and a rotor sheath, wherein a through hole is formed in the center of the rotor core, the cross section of the rotor core is in a regular polygon shape, a magnetic isolation groove is formed in the periphery of the rotor core at the junction of the side edges, the magnetic steel fixing piece is partially filled in the magnetic isolation groove, the magnetic steel fixing piece is in a T shape, the magnetic steel is inserted into a cavity formed by the adjacent two T-shaped magnetic steel fixing pieces and the surface of the rotor core, the rotating shaft is pressed into the through hole in the center of the rotor core, and the magnetic steel; the rotor sheath is cylindrical, one side of the rotor sheath is provided with a closing-in which is preset and is closed towards the circle center, and the closing-in is annular; the rotor sheath is sleeved outside the rotor core, one side of the closing-in is positioned at the shaft extension side, the other side of the rotor sheath is also folded towards the circle center, and the closing-in is annular.
The utility model is provided with a magnetism isolating groove at the junction of regular polygon, which can increase magnetic resistance and reduce magnetic leakage, the magnetic steel fixing part is partially arranged in the magnetism isolating part, the magnetic steel fixing part is T-shaped, the magnetic steel is inserted into a cavity formed by two T-shaped magnetic steel fixing parts and the polygon surface of the rotor core, the magnetic steel fixing parts have certain elasticity, the two T-shaped magnetic steel fixing parts give the magnetic steel pressure towards the circle center, under the condition of impact vibration, the magnetic steel can be firmly fixed in the cavity in the radial direction, the cavity formed by the two T-shaped magnetic steel fixing parts and the polygon surface of the rotor core is a semi-plastic packaging structure of the magnetic steel, which saves more materials than the whole plastic packaging, the magnetic steel fixing parts are provided with side baffle rings at the iron core positions at both sides of the motor rotor, which plays the role of axially fixing the magnetic steel, the rotor, the scraps generated in the rotor assembling process can be limited in the rotor sheath, and the scraps generated by aging of materials in the rotor operation process can be limited in the rotor sheath, so that the operation noise of the motor is reduced.
The rotor sheath is cylindrical, and a closed opening which is closed towards the circle center is preset at one side and is annular. The pre-set closing-up can transfer part of the procedures of the production line to be completed under the production line, and the assembly time on the production line can be saved. And the rotor sheath can be fixed in the axial direction by matching with the closing-in at the other side. The binding off of both sides is the ring form, can improve assembly efficiency, and can the axial fixity rotor sheath.
The inner diameter of a pre-closing ring on one side of the rotor sheath is D1, the outer diameter is D2, D2-D1 is larger than 6mm, after the pre-closing is performed on one side of the rotor sheath, the distance between baffle rings on two sides of the rotor core is H1, the height of the rotor sheath is H2, H1-H2 is larger than or equal to 2mm and smaller than or equal to 5mm, the inner diameter of a closing ring on the other side of the rotor sheath is D3, the outer diameter is D2, and D2-D3 are larger than or equal to 4mm and smaller than or equal to 6 mm. D2-D1 are the parts covering the fixed plastic ring structure surface groove, if the value is less than 6mm, the riveting part becomes small, the riveting quality will be reduced, the preset closing up is completed by tooling, when D2-D1 is more than 6mm, the closing up can be ensured to be relatively flat, and the closing up and the protrusion can not be raised. After one side of the rotor sheath is pre-closed, the distance between the fixed plastic ring structures on the two sides of the rotor is H1, the height of the rotor sheath is H2, H1-H2 is not more than 2mm and not more than 5mm, H1-H2 is the size of the rear closing-in on the other side, the closing-in allowance is too small when the diameter is less than 2mm, the closing-in is not obvious, the rotor sheath is easy to axially fall off, the closing-in forming can only be carried out on one side by means of the fixed plastic ring structures, when the diameter is more than 5mm, the closing-in part can be tilted and protruded, the risk of sweeping the rotor is caused, the inner diameter of the closing-in ring on the other side of the rotor sheath is D3, the outer diameter is D2, when the diameter is not less than 4mm and not more than 6mm, when the D2-D3 is less than 4 mm.
The highest point of the magnetic steel after the magnetic steel is inserted into the magnetic steel is positioned on the same circle with the highest point of the magnetic steel fixing part, the diameter of the magnetic steel is D, the inner diameter of the rotor sheath is D, and D-D is larger than or equal to 0.15mm and smaller than or equal to 0.3 mm. Because the highest point of the inserted magnetic steel cannot be completely on the same circle, when the D-D is less than 0.15mm, the sheath is difficult to insert, but when the D-D is more than 0.3mm, the sheath and the magnetic steel are not tightly attached, and noise can be generated after the motor operates.
The magnetic steel fixing piece is also provided with a groove on the surface of the side baffle ring on one side of the non-shaft-extension end.
The number of the sides of the rotor core, which are in the shape of a regular polygon, is equal to the number of the magnetic steels, and the number of the T-shaped magnetic steel fixing pieces is 2 times of the number of the magnetic steels.
The side retaining ring is provided with a radius of 0.1 mm; the two sides of the rotor sheath are provided with a rounding at the closing-up bending part, and the radius of the rounding is also 0.1 mm.
The outer diameter of the whole rotor structure is smaller than 100mm, and the thickness of the rotor sheath is smaller than 0.2 mm.
When the rotor is installed, pressure is applied to the rotor sheath covering the groove on the surface of the magnetic steel fixing piece, the rotor sheath deforms and enters the groove on the surface of the magnetic steel fixing piece, and the rotor sheath deforms through entering the groove on the surface when the rotor rotates, so that the rotor sheath is fixed in the radial direction. The method can achieve the double-side riveting effect only by riveting the rotor sheath which is covered on the surface groove of the fixed plastic annular structure on one side. The assembly cost is reduced.
Above-mentioned technical scheme can realize the back, the utility model discloses a permanent-magnet machine rotor structure keeps off the combined action of ring through the side of separating magnetic groove and rotor core both sides, and it has reached that the magnetic leakage rate is low, save material and the high two-point effect of work efficiency.
Drawings
The present invention will be described in further detail with reference to the following embodiments, which are illustrated in the accompanying drawings.
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic diagram of the explosion structure of the present invention;
FIG. 3 is a schematic view of the magnetic steel structure of the present invention;
fig. 4 is a schematic structural view of the rotor core of the present invention;
fig. 5 is a structural axial view of an angle after the magnetic steel fixing member of the present invention is injected into the rotor core;
fig. 6 is a structural axial view of the rotor core at another angle after the magnetic steel fixing member of the present invention is injected into the rotor core;
FIG. 7 is a schematic view of a rotor sheath configuration;
fig. 8 is a schematic structural view of the present invention when the rotor sheath is not installed.
Detailed Description
The present invention will be further described with reference to the following examples.
As shown in fig. 1 to 8, a rotor structure of a permanent magnet motor includes: pivot 1, magnet steel 2, rotor core 3, magnet steel mounting 4 and rotor sheath 5, through-hole 3-1 is established at 3 centers of rotor core, and 3 cross-sections of rotor core are regular polygon, rotor core 3's periphery is equipped with magnetism-isolating groove 6 in side juncture, and 4 partial branch of magnet steel mounting are annotated and are located magnetism-isolating groove 6, and magnet steel mounting 4 is the T font, and magnet steel 2 inserts in the cavity 7 of two adjacent T font magnet steel mounting 4 and 3 surperficial formations of rotor core, and pivot 1 is impressed in 3 central through-holes 3-1 of rotor core, its characterized in that: the magnetic steel fixing part 4 also comprises side baffle rings 4-1 at two sides of the rotor iron core 3; the rotor sheath 5 is cylindrical, and one side of the rotor sheath is provided with a preset closing-in which is closed towards the circle center and is annular; the rotor sheath 5 is sleeved outside the rotor core 3, one side of the closing-in is positioned at the shaft extension side, the other side of the rotor sheath 5 is also folded towards the circle center, and the closing-in is annular.
The utility model discloses in, magnet steel mounting 4 is that PBT adds 30% glass fiber, and rotor sheath 5's material is stainless steel 304.
The orthographic projection surface of the magnetic steel is in an arch shape.
The inner diameter of a pre-closing ring at one side of the rotor sheath 5 is D1, the outer diameter is D2, D2-D1 is larger than 6mm, after one side of the rotor sheath is pre-closed, the distance between the baffle rings 4-1 at two sides of the rotor core 3 is H1, the height of the rotor sheath 5 is H2, H1-H2 is larger than or equal to 2mm and smaller than or equal to 5mm, the inner diameter of a closing ring at the other side of the rotor sheath is D3, the outer diameter is D2, and D2-D3 are larger than or equal to 4mm and smaller than or equal to 6 mm.
The highest point of the magnetic steel 2 and the highest point of the magnetic steel fixing part 4 are positioned on the same circle after the magnetic steel 2 is inserted, the diameter of the magnetic steel 2 is D, the inner diameter of the rotor sheath 5 is D, and D-D is larger than or equal to 0.15mm and smaller than or equal to 0.3 mm.
The magnetic steel fixing part 4 is also provided with a groove 4-2 on the surface of the side baffle ring 4-1 at one side of the non-shaft-extension end.
The number of the sides of the rotor core 3, which are in the shape of a regular polygon, is equal to the number of the magnetic steels, and the number of the T-shaped magnetic steel fixing parts 4 is 2 times of the number of the magnetic steels.
The side baffle ring 4-1 is provided with a radius of 0.1 mm; the closing-in department of bending of 5 both sides of rotor sheath is equipped with the radius, and the radius of radius also is 0.1 mm.
The outer diameter of the whole rotor structure is smaller than 100mm, and the thickness of the rotor sheath 5 is smaller than 0.2 mm.
The utility model discloses exert pressure to rotor sheath 5 that covers on 4 surperficial recesses 4-2 of magnet steel mounting during the installation, produce rotor sheath 5 and deform, enter into 4 surperficial recesses 4-2 of magnet steel mounting, rotor sheath 5 is fixed in radial direction through entering 5 deformations of rotor sheath in the surface recess 4-2 during the rotation. The method can achieve the double-side riveting effect only by riveting the rotor sheath which is covered on the surface groove of the fixed plastic annular structure on one side. The assembly cost is reduced.
The utility model discloses a preliminary examination galley proof is at the concrete implementation in-process, and assembly process is simple, and rotor structure is reliable, and motor stable performance has gained fine result of use.
Claims (7)
1. A permanent magnet electric machine rotor structure comprising: pivot (1), magnet steel (2), rotor core (3), magnet steel mounting (4) and rotor sheath (5), through-hole (3-1) are established at rotor core (3) center, and rotor core (3) cross-section is regular polygon, the periphery of rotor core (3) is equipped with magnetism-isolating groove (6) in side juncture, and magnet steel mounting (4) portion is divided and is annotated in magnetism-isolating groove (6), and magnet steel mounting (4) are the T font, and magnet steel (2) insert in cavity (7) of adjacent two T font magnet steel mounting (4) and rotor core (3) surface formation, and pivot (1) are impressed in rotor core (3) central through-hole (3-1), its characterized in that: the magnetic steel fixing piece (4) also comprises side baffle rings (4-1) arranged at two sides of the rotor iron core (3); the rotor sheath (5) is cylindrical, one side of the rotor sheath is provided with a closing-in which is preset and is closed towards the circle center, and the closing-in is annular; the rotor sheath (5) is sleeved outside the rotor core (3), one side of the closing-in is positioned at the shaft extension side, the other side of the rotor sheath (5) is also closed towards the circle center, and the closing-in is annular.
2. The permanent magnet motor rotor structure of claim 1, wherein: the inner diameter of a closing-in circular ring preset on one side of a rotor sheath (5) is D1, the outer diameter is D2, D2-D1 is larger than 6mm, after one side of the rotor sheath is closed in advance, the distance between side baffle rings (4-1) on two sides of a rotor iron core (3) is H1, the height of the rotor sheath (5) is H2, H1-H2 is larger than or equal to 2mm and smaller than or equal to 5mm, the inner diameter of a closing-in circular ring on the other side of the rotor sheath is D3, the outer diameter is D2, and D2-D3 is larger than or equal to 4mm and smaller than or equal.
3. The permanent magnet motor rotor structure of claim 1, wherein: the highest point of the inserted magnetic steel (2) and the highest point of the magnetic steel fixing part (4) are positioned on the same circle, the diameter of the magnetic steel (2) is D, the inner diameter of the rotor sheath (5) is D, and D-D is larger than or equal to 0.15mm and smaller than or equal to 0.3 mm.
4. The permanent magnet motor rotor structure of claim 1, wherein: the magnetic steel fixing piece (4) is also provided with a groove (4-2) on the surface of the side baffle ring (4-1) on one side of the non-shaft-extension end.
5. The permanent magnet motor rotor structure of claim 1, wherein: the number of the sides of the rotor core (3) which are in the shape of a regular polygon is equal to the number of the magnetic steels, and the number of the T-shaped magnetic steel fixing pieces (4) is 2 times of the number of the magnetic steels.
6. The permanent magnet motor rotor structure of claim 1, wherein: the side baffle ring (4-1) is provided with a radius of 0.1 mm; the closing-in bending positions at the two sides of the rotor sheath (5) are provided with rounding, and the radius of the rounding is also 0.1 mm.
7. The permanent magnet motor rotor structure of claim 1, wherein: the outer diameter of the whole rotor structure is smaller than 100mm, and the thickness of the rotor sheath (5) is smaller than 0.2 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921108466.8U CN210123915U (en) | 2019-07-15 | 2019-07-15 | Permanent magnet motor rotor structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921108466.8U CN210123915U (en) | 2019-07-15 | 2019-07-15 | Permanent magnet motor rotor structure |
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| Publication Number | Publication Date |
|---|---|
| CN210123915U true CN210123915U (en) | 2020-03-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921108466.8U Active CN210123915U (en) | 2019-07-15 | 2019-07-15 | Permanent magnet motor rotor structure |
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| CN (1) | CN210123915U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277850A (en) * | 2019-07-15 | 2019-09-24 | 日本电产凯宇汽车电器（江苏）有限公司 | A kind of rotor structure for permanent magnet motor and installation method |
-
2019
- 2019-07-15 CN CN201921108466.8U patent/CN210123915U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110277850A (en) * | 2019-07-15 | 2019-09-24 | 日本电产凯宇汽车电器（江苏）有限公司 | A kind of rotor structure for permanent magnet motor and installation method |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 266, Fumin Road, Lucheng Street, Wujin District, Changzhou City, Jiangsu Province, 213000 Patentee after: Nedco Kaiyu Automotive Appliances (Jiangsu) Co.,Ltd. Address before: 213025 No. 156 Dongfang East Road, Qishuyan Economic Development Zone, Changzhou City, Jiangsu Province Patentee before: NIDEC KAIYU AUTO ELECTRIC (JIANGSU) Co.,Ltd. |
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| CP03 | Change of name, title or address |