CN214154184U - Surface-mounted rotor magnetic steel anti-drop structure - Google Patents
Surface-mounted rotor magnetic steel anti-drop structure Download PDFInfo
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- CN214154184U CN214154184U CN202120234226.3U CN202120234226U CN214154184U CN 214154184 U CN214154184 U CN 214154184U CN 202120234226 U CN202120234226 U CN 202120234226U CN 214154184 U CN214154184 U CN 214154184U
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- end cover
- magnetic steel
- sheath
- rotor core
- rotor
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Abstract
The utility model provides a surface-mounted rotor magnetic steel anti-drop structure, which comprises a rotating shaft and a sheath; the rotating shaft is connected with a rotor core, and a plurality of magnetic steels are uniformly distributed on the outer wall of the rotor core; two ends of the magnetic steel are fixed through a first end cover and a second end cover respectively; the rotor core, the magnetic steel, the first end cover and the second end cover are fixedly wrapped by the sheath, and the first end cover and the second end cover are axially fixed by flanging the two ends of the sheath. The utility model discloses the magnet steel is on the circumferencial direction, evenly distributed is on the outer circumference of rotor core, and the axial is fixed through the end cover, and is as an organic whole with rotor core, magnet steel, end cover parcel through the sheath at last for the magnet steel obtains reliably fixed, and this processing is also convenient, and assembly and easy maintenance make and use cost lower.
Description
Technical Field
The utility model relates to a table pastes formula rotor magnet steel anti-drop structure belongs to PMSM rotor structural design technical field.
Background
Based on motor structure and performance requirements, the rotor structure of the small permanent magnet synchronous motor mostly adopts a surface-mounted type, and in order to prevent the magnetic steel from falling off, the prior art scheme mostly adopts the gluing primary fixation between the magnetic steel and a rotor core, or the rotor is wholly wrapped inside by adopting plastic coating.
The above scheme has the following problems: the consistency of the gluing thickness is difficult to ensure, the assembly uniformity of the magnetic steel is influenced, and the glue is easy to lose efficacy in the environment of high-speed centrifugal force, high temperature, oil soaking and the like, so that the magnetic steel falls off; in addition, the plastic coating scheme has complex process, higher requirement on processing capacity, larger influence on production rhythm and no contribution to mass production, and the plastic coating layer needs to be damaged after the magnetic steel fails, so that the rotor is difficult to maintain, the manufacturing and using cost is high, and the mass popularization and use of the motor of the type are influenced to a certain extent.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a surface-mounted rotor magnet steel anti-drop structure, this surface-mounted rotor magnet steel anti-drop structure can compromise performance and assembly efficiency, reduces manufacturing and use cost simultaneously.
The utility model discloses a following technical scheme can realize.
The utility model provides a surface-mounted rotor magnetic steel anti-drop structure, which comprises a rotating shaft and a sheath; the rotating shaft is connected with a rotor core, and a plurality of magnetic steels are uniformly distributed on the outer wall of the rotor core; two ends of the magnetic steel are fixed through a first end cover and a second end cover respectively; the rotor core, the magnetic steel, the first end cover and the second end cover are fixedly wrapped by the sheath, and the first end cover and the second end cover are axially fixed by flanging the two ends of the sheath.
And a plurality of grooves with the same size are arranged on the outer wall of the rotor core along the circumferential direction, and the number of the grooves is equal to that of the magnetic steels.
A boss is arranged between the grooves.
The rotor iron core is formed by laminating silicon steel sheets, and the sheath is a thin-wall stainless steel non-magnetic sheath.
The magnetic steel is arranged on the outer wall of the rotor core at intervals of N, S poles in the circumferential direction, and the number of N poles and S poles arranged at intervals is equal.
The diameters of the outer circles of the first end cover and the second end cover are equal to the diameter of the outer circle formed by the highest point of the magnetic steel.
The first end cap and the second end cap are the same in size.
The distance between the two ends of the sheath and the end faces of the first end cover and the second end cover is unequal, and a spot riveting process is adopted on one side with a large distance.
The beneficial effects of the utility model reside in that: the magnetic steel is in the circumferencial direction, evenly distributed is on rotor core outer circumference, and the axial is fixed through the end cover, wraps up rotor core, magnetic steel, end cover as an organic whole through the sheath at last for the magnetic steel obtains reliably fixed, and this structure processing is convenient, assembly and easy maintenance, and manufacturing and use cost are lower.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic view of the present invention with the end cap and sheath removed;
FIG. 3 is a schematic view of the present invention with the sheath removed;
in the figure: 1-rotor core, 11-boss, 12-groove, 2-magnetic steel, 3-first end cover, 4-second end cover, 5-rotating shaft and 6-sheath.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
The surface-mounted rotor magnetic steel anti-drop structure shown in fig. 1-3 comprises a rotating shaft 5 and a sheath 6; the rotating shaft 5 is connected with a rotor core 1, and a plurality of magnetic steels 2 are uniformly distributed on the outer wall of the rotor core 1; two ends of the magnetic steel 2 are fixed through a first end cover 3 and a second end cover 4 respectively; the sheath 6 wraps and fixes the rotor core 1, the magnetic steel 2, the first end cover 3 and the second end cover 4, the two ends of the sheath 6 are flanged, and the first end cover 3 and the second end cover 4 are axially fixed.
The outer wall of the rotor core 1 is provided with a plurality of grooves 12 with the same size along the circumferential direction, and the number of the grooves 12 is equal to that of the magnetic steels 2.
A boss 11 is arranged between the grooves 12 and the grooves 12.
The rotor iron core 1 is formed by laminating silicon steel sheets, and the sheath 6 is a thin-wall sheath made of stainless steel and not conducting magnetic force.
The magnetic steel 2 is arranged on the outer wall of the rotor core 1 at intervals of N, S poles in the circumferential direction, and the number of the N poles and the S poles arranged at intervals is equal.
The diameters of the outer circles of the first end cover 3 and the second end cover 4 are equal to the diameter of the outer circle formed by the highest point of the magnetic steel 2, and the magnetic steel 2 can be completely fixed in the axial direction.
The first end cap 3 and the second end cap 4 are of the same size.
The distance between the two ends of the sheath 6 and the end faces of the first end cover 3 and the second end cover 4 is unequal, and a spot riveting process is adopted on the side with the larger distance.
Examples
As described above, a surface-mounted rotor magnetic steel mounting structure includes a rotor core 1, a magnetic steel 2, a first end cap 3, a second end cap 4, a rotating shaft 5, and a sheath 6. The rotor core 1, the magnetic steel 2, the first end cover 3, the second end cover 4 and the sheath 6 are all arranged on the rotating shaft 5, the first end cap 3 is mounted on the left side of the rotor core 1, the second end cap 3 is mounted on the right side of the rotor core 1, magnet steel 2 has a plurality ofly, and even subsection is installed respectively on the outer face of cylinder of rotor core, magnet steel 2 is placed in 1 circumferencial direction evenly distributed's of rotor core recess 12, is equipped with boss 11 between the recess 12, ensures recess 12 circumferencial direction evenly distributed, also can place magnet steel 2 and remove to the circumferencial direction, and magnet steel 2 both ends are passed through first end cap 3, 4 axial fixings of second end cap adopt 6 at last to wrap up rotor core 1, magnet steel 2, first end cap 3, second end cap 4 fixedly, and the both ends turn-ups of sheath 6, and then with first end cap 3, 4 axial fixings of second end cap.
The rotor core 1 is formed by laminating silicon steel sheets with certain thickness, a plurality of grooves 12 with the same size are uniformly arranged in the outer circumferential direction of the rotor core 1, bosses 11 between the grooves 12 cannot be too high, otherwise, the magnetic path trend of the motor is influenced, more magnetic leakage is generated due to too high height, and the performance of the motor is further influenced.
The magnetic steel 2N, S is placed in the groove 12 on the outer circumference of the rotor core 1 in half-and-half mode at intervals, and the number of the magnetic steel 2 is consistent with the number of the grooves 12 on the rotor core 1.
The diameters of the outer circles of the first end cover 3 and the second end cover 4 are consistent with the diameter of the outer circle formed by the highest point of the magnetic steel 2.
The first end cover 3 and the second end cover 4 are made of materials with certain temperature resistance through injection molding, and the sizes are completely consistent.
The sheath 6 is a stainless steel non-magnetic thin-wall sheath, the thickness is usually 0.1-0.3 mm, and the specific requirement is determined according to the performance of the motor.
The distance between the two ends of the sheath 6 and the end faces of the first end cover 3 and the second end cover 4 is different, wherein the side with the large distance adopts a spot riveting process, so that the abrasion of the magnetic steel and the generation of abnormal noise caused by the movement of the sheath 6 in the high-speed rotating circumferential direction can be prevented.
And the magnetic steel 2 is assembled behind the rotor core and then is magnetized again, and is not glued and fixed any more during assembly.
The utility model discloses an assembly process as follows:
the rotor core 1 is pressed on the rotating shaft 5, then the magnetic steels 2 with corresponding quantity are placed in the grooves of the corresponding rotor core 1, N, S poles are symmetrically distributed at intervals, then the first end cover 3 and the second end cover 4 are assembled, finally the sheath 6 is assembled, two ends of the sheath 6 are flanged, and one side with a large distance is riveted.
To sum up, the utility model discloses a boss on the rotor core evenly distributes the N, S utmost points of magnet steel on the outer circumference of rotor core, and the axial is fixed through first end cover and second end cover, adopts the sheath turn-ups at last, fixes magnet steel, first end cover and second end cover on the rotor core, consequently, this structure does not need the rubber coating, and magnet steel axial, radially all obtain reliably fixed, and part is small in quantity, assembly process is simple, installation and easy maintenance, low in manufacturing cost, easy to implement.
Claims (8)
1. The utility model provides a table pastes formula rotor magnet steel anti-drop structure, includes pivot (5) and sheath (6), its characterized in that: the rotating shaft (5) is connected with a rotor core (1), and a plurality of magnetic steels (2) are uniformly distributed on the outer wall of the rotor core (1); two ends of the plurality of magnetic steels (2) are respectively fixed through the first end cover (3) and the second end cover (4); the rotor core (1), the magnetic steel (2), the first end cover (3) and the second end cover (4) are wrapped and fixed by the sheath (6), the two ends of the sheath (6) are flanged, and the first end cover (3) and the second end cover (4) are axially fixed.
2. The surface-mounted rotor magnetic steel anti-drop structure of claim 1, wherein: the outer wall of the rotor core (1) is provided with a plurality of grooves (12) with the same size along the circumferential direction, and the number of the grooves (12) is equal to that of the magnetic steels (2).
3. The surface-mounted rotor magnetic steel anti-drop structure as claimed in claim 2, wherein: a boss (11) is arranged between the groove (12) and the groove (12).
4. The surface-mounted rotor magnetic steel anti-drop structure of claim 1, wherein: the rotor iron core (1) is formed by laminating silicon steel sheets, and the sheath (6) is a stainless steel non-magnetic thin-wall sheath.
5. The surface-mounted rotor magnetic steel anti-drop structure of claim 1, wherein: the magnetic steel (2) is arranged on the outer wall of the rotor core (1) at intervals of N, S poles in the circumferential direction, and the number of N poles and S poles arranged at intervals is equal.
6. The surface-mounted rotor magnetic steel anti-drop structure of claim 1, wherein: the diameters of the outer circles of the first end cover (3) and the second end cover (4) are equal to the diameter of the outer circle formed by the highest point of the magnetic steel (2).
7. The surface-mounted rotor magnetic steel anti-drop structure of claim 1, wherein: the first end cover (3) and the second end cover (4) are the same in size.
8. The surface-mounted rotor magnetic steel anti-drop structure of claim 1, wherein: the distance between the two ends of the sheath (6) and the end faces of the first end cover (3) and the second end cover (4) is unequal, and a point riveting process is adopted on the side with the large distance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120234226.3U CN214154184U (en) | 2021-01-26 | 2021-01-26 | Surface-mounted rotor magnetic steel anti-drop structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120234226.3U CN214154184U (en) | 2021-01-26 | 2021-01-26 | Surface-mounted rotor magnetic steel anti-drop structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214154184U true CN214154184U (en) | 2021-09-07 |
Family
ID=77549039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120234226.3U Active CN214154184U (en) | 2021-01-26 | 2021-01-26 | Surface-mounted rotor magnetic steel anti-drop structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214154184U (en) |
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2021
- 2021-01-26 CN CN202120234226.3U patent/CN214154184U/en active Active
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