CN215990360U - Rotor unit - Google Patents
Rotor unit Download PDFInfo
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- CN215990360U CN215990360U CN202122340918.9U CN202122340918U CN215990360U CN 215990360 U CN215990360 U CN 215990360U CN 202122340918 U CN202122340918 U CN 202122340918U CN 215990360 U CN215990360 U CN 215990360U
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- rotor
- permanent magnet
- magnetic pole
- unit according
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Abstract
The utility model provides a rotor unit, which comprises an annular rotor bracket, and magnetic pole iron cores and permanent magnets which are alternately arranged on the outer ring of the rotor bracket around the axis of the rotor bracket, wherein two adjacent magnetic pole iron cores are extruded on two sides of the permanent magnet, and the peripheral surface of each magnetic pole iron core is higher than the peripheral surface of the permanent magnet; the inner ring of the rotor support is provided with a connecting piece for fixing the magnetic pole iron core, the rotor support is also provided with a mounting plate for being connected with a motor rotating shaft, and the mounting plate is positioned on one side, close to the motor rotating shaft, of the connecting piece. The rotor unit provided by the utility model realizes the fixation of the permanent magnet through the magnetic pole iron core, avoids the problem that the peripheral surface of the magnetic pole iron core is higher than the peripheral surface of the permanent magnet due to the fact that holes are formed in the permanent magnet to influence the magnetic field uniformity of the permanent magnet, avoids the friction between the permanent magnet and a stator, prevents the surface coating of the permanent magnet from being scratched and even broken, and prolongs the service life of the permanent magnet.
Description
Technical Field
The utility model belongs to the technical field of permanent magnet motors, and particularly relates to a rotor unit.
Background
In the existing permanent magnet motor, the permanent magnet of the rotor generally adopts a surface-mounted structure or a built-in structure. When the motor is assembled, the permanent magnet and the inner surface of the stator are rubbed, so that the surface coating of the permanent magnet is scratched or even the permanent magnet is broken, the motor assembly risk is high, and the difficulty is high; the surface of the permanent magnet is oxidized after the permanent magnet coating is scratched, and the service life is shortened.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a rotor unit, aiming at avoiding friction between a stator and a permanent magnet during installation, prolonging the service life of the permanent magnet and reducing the assembling risk of a motor.
In order to achieve the purpose, the utility model adopts the technical scheme that: providing a rotor unit, which comprises an annular rotor support, and magnetic pole iron cores and permanent magnets which are alternately arranged on the outer ring of the rotor support around the axis of the rotor support, wherein two adjacent magnetic pole iron cores are extruded on two sides of the permanent magnet, and the peripheral surface of each magnetic pole iron core is higher than the peripheral surface of the permanent magnet;
the inner ring of the rotor support is provided with a connecting piece for fixing the magnetic pole iron core, the rotor support is also provided with a mounting plate for being connected with a motor rotating shaft, and the mounting plate is positioned on one side, close to the motor rotating shaft, of the connecting piece.
In a possible implementation, a side of the mounting plate close to the connector is provided with a reinforcing rib, and the reinforcing rib is connected between the mounting plate and the rotor support.
In one possible implementation, the plurality of reinforcing ribs are uniformly distributed around the axis of the rotor support.
In a possible implementation manner, the magnetic pole core is parallel to the iron core key penetrates through the axial direction of the rotor support, the iron core key is provided with a first mounting hole connected with the connecting piece, the magnetic pole core is provided with a first through hole coaxially arranged with the first mounting hole, and the connecting piece penetrates through the first through hole and is matched with the first mounting hole.
In a possible implementation manner, the connecting member is a bolt, and an elastic washer is further disposed between the bolt and the rotor support.
In a possible implementation manner, a magnetic isolation baffle is further arranged between the magnetic pole core and the rotor support, each magnetic isolation baffle corresponds to a plurality of magnetic pole cores, and a second through hole for the connecting piece to pass through is formed in each magnetic isolation baffle.
In a possible implementation manner, two shaft ends of the iron core key are respectively provided with a positioning baffle, each positioning baffle corresponds to a plurality of magnetic pole iron cores, and the positioning baffles are used for limiting the permanent magnet in the axial direction of the rotor support.
In a possible implementation manner, a second mounting hole parallel to the axial direction of the rotor support is formed in the iron core key, and a connecting portion matched with the second mounting hole is formed in the positioning baffle.
In a possible implementation manner, the connecting part is fixedly arranged on the positioning baffle and is in interference fit with the second mounting hole;
or the connecting part is detachably arranged on the positioning baffle and is in threaded fit with the second mounting hole.
In a possible implementation manner, the inner ring and the outer ring of the pole core are both provided with a limiting step, and the limiting steps are used for limiting the position of the permanent magnet in the radial direction of the rotor support.
In the embodiment of the application, compared with the prior art, the rotor unit realizes the fixation of the permanent magnet through the magnetic pole iron core, and the influence on the uniformity of the magnetic field of the permanent magnet due to the holes formed in the permanent magnet is avoided; the peripheral surface of the magnetic pole iron core is higher than the peripheral surface of the permanent magnet, and the magnetic pole iron core is propped against the inner ring of the stator in the process of magnetic attraction with the stator, so that the friction between the permanent magnet and the stator is avoided, the surface coating of the permanent magnet is prevented from being scratched or even broken, the service life of the permanent magnet is prolonged, and the assembly risk of the motor is reduced; because the connecting piece has set up the inner circle at the spider, the position of last mounting panel of spider has played the abdicating to the connecting piece, makes things convenient for the installation of connecting piece, conveniently is connected with motor shaft simultaneously.
Drawings
Fig. 1 is a schematic front view of a rotor unit according to an embodiment of the present invention;
FIG. 2 is an enlarged view of portion A of FIG. 1;
fig. 3 is a schematic perspective view of a rotor unit according to an embodiment of the present invention;
fig. 4 is a schematic perspective view of a magnetic pole core according to an embodiment of the present invention;
fig. 5 is a schematic perspective view of an iron core key according to an embodiment of the present invention.
Description of reference numerals:
10-a rotor support; 20-pole core; 30-a permanent magnet; 40-magnetic isolation baffle; 50-positioning baffle
11-a mounting plate; 21-iron core key;
12-reinforcing ribs; 22-a first mounting hole;
23-a second mounting hole;
24-a limit step;
25-a connector;
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
Referring to fig. 1 to 5 together, a rotor unit according to the present invention will now be described. The rotor unit comprises an annular rotor support 10, and magnetic pole cores 20 and permanent magnets 30 which are alternately arranged on the outer ring of the rotor support 10 around the axis of the rotor support 10, wherein two adjacent magnetic pole cores 20 are extruded on two sides of each permanent magnet 30, and the peripheral surfaces of the magnetic pole cores 20 are higher than the peripheral surfaces of the permanent magnets 30; the inner ring of the rotor support 10 is provided with a connecting piece 25 for fixing the magnetic pole core 20, the rotor support 10 is provided with a mounting plate 11 for connecting with a motor rotating shaft, and the mounting plate 11 is positioned on one side of the connecting piece 25 close to the motor rotating shaft.
The rotor unit that this embodiment provided, in the equipment, set up magnetic pole core 20 and permanent magnet 30 in the outer lane of spider 10 in turn, wherein every magnetic pole core 20 is fixed with spider 10 through connecting piece 25, two adjacent magnetic pole cores 20 extrude the both sides realization to permanent magnet 30 fixed, the back is accomplished in the equipment, mounting panel 11 on the spider 10 is connected with motor shaft, permanent magnet 30 is because the effect of magnetism is inhaled, make it adsorb together with the stator, but because magnetic pole core 20's periphery is higher than permanent magnet 30, permanent magnet 30 and stator production direct contact have been avoided.
Compared with the prior art, the rotor unit realizes the fixation of the permanent magnet 30 through the magnetic pole iron core 20, and avoids the influence on the magnetic field uniformity of the permanent magnet 30 caused by the holes on the permanent magnet 30; the peripheral surface of the magnetic pole iron core 20 is higher than the peripheral surface of the permanent magnet 30, and in the process of magnetic attraction with the stator, the magnetic pole iron core 20 is propped against the inner ring of the stator, so that the friction between the permanent magnet 30 and the stator is avoided, the surface coating of the permanent magnet 30 is prevented from being scratched or even broken, the service life of the permanent magnet 30 is prolonged, and the assembly risk of the motor is reduced; because the connecting piece 25 is arranged at the inner ring of the rotor support 10, the position of the mounting plate 11 on the rotor support 10 gives way to the connecting piece 25, so that the connecting piece 25 is convenient to mount and is convenient to be connected with a motor rotating shaft.
In some embodiments, the structure shown in fig. 1 and 3 may be used to achieve the reinforcement of the mounting plate 11. Referring to fig. 1 and 3, a reinforcing rib 12 is provided on one side of the mounting plate 11 adjacent to the connecting member 25, and the reinforcing rib 12 is connected between the mounting plate 11 and the rotor frame 10. One side that mounting panel 11 is close to connecting piece 25 is one side that mounting panel 11 deviates from motor shaft, through set up strengthening rib 12 between spider 10 and mounting panel 11, improves mounting panel 11's structural stability, and then when motor shaft drives spider 10 pivoted, improves pivoted stability.
It should be noted that, when the length of the reinforcing rib 12 in the axial direction of the rotor support 10 does not exceed the distance between the connecting piece 25 and the mounting plate 11, the position of the reinforcing rib 12 can be arbitrarily mounted; when the length of the reinforcing ribs 12 in the axial direction of the rotor frame 10 exceeds the distance between the connecting members 25 and the mounting plate 11, the space between two adjacent connecting members 25 forms a space for mounting the reinforcing ribs 12.
In some embodiments, the reinforcing ribs 12 may be configured as shown in fig. 1 and 3. Referring to fig. 1 and 3, a plurality of reinforcing ribs 12 are uniformly distributed around the axis of the rotor frame 10. The increased number of ribs 12 and the even distribution of their positions provide better stability of the mounting plate 11. Optionally, the number of the reinforcing ribs 12 can be 6, so that on the basis of ensuring the strength of the mounting plate 11, the cost is not increased due to the use of too many reinforcing ribs 12.
In some embodiments, the pole core 20 may be configured as shown in fig. 2 and 4. Referring to fig. 2 and 4, the pole core 20 has a core key 21 extending through the core key in a direction parallel to the axial direction of the rotor holder 10, the core key 21 is provided with a first mounting hole 22 connected to a connecting member 25, the pole core 20 is provided with a first through hole coaxially disposed with the first mounting hole 22, and the connecting member 25 is matched with the first mounting hole 22 by passing through the first through hole. When the magnetic pole core 20 is mounted and dismounted, the hole matched with the connecting piece 25 is easy to consume, if the first mounting hole 22 is arranged on the magnetic pole core 20, the magnetic pole core 20 needs to be replaced when the first mounting hole 22 cannot be matched with the connecting piece 25 due to abrasion, and the maintenance cost is increased; when the core key 21 is provided, the cost for replacing the core key 21 alone is lower than that for replacing the pole core 20.
In some embodiments, the connecting member 25 may be configured as shown in fig. 1 and 3. Referring to fig. 1 and 3, the connecting member 25 is a bolt, and an elastic washer is further disposed between the bolt and the rotor frame 10. The connecting piece 25 is a bolt, and the first mounting hole 22 is an internal threaded hole, so that the connection is firmer; through setting up the elastic washer, can guarantee bolted connection's steadiness, prevent that the bolt is not hard up.
As an alternative structure of the connecting member 25, the connecting member 25 may also be a fixing pin, and the fixing pin is inserted into the first mounting hole 22 and is connected with the first mounting hole 22 in an interference fit manner.
In some embodiments, the structure shown in fig. 1 to 3 may be adopted between the pole core 20 and the rotor holder 10. Referring to fig. 1 to 3, a magnetic isolation baffle 40 is further disposed between the magnetic pole cores 20 and the rotor support 10, each magnetic isolation baffle 40 is disposed corresponding to a plurality of magnetic pole cores 20, and a second through hole for the connection member 25 to pass through is disposed on the magnetic isolation baffle 40. In the installation of the connecting piece 25, the connecting piece 25 realizes the synchronous fixation of the magnetic pole iron cores 20 and the magnetism isolating baffles 40, each magnetism isolating baffle 40 corresponds to a plurality of magnetic pole iron cores 20, the use number of the magnetism isolating baffles 40 can be reduced, the installation is convenient, and the labor intensity is reduced.
In some embodiments, the permanent magnet 30 may be configured as shown in fig. 1-3 for restraining. Referring to fig. 1 to 3, two shaft ends (the two shaft ends refer to two end portions of the core key 21 in the axial direction of the rotor frame 10, and the shaft ends are the same as the shaft ends hereinafter) of the core key 21 are further provided with positioning baffles 50, each positioning baffle 50 is disposed corresponding to a plurality of magnetic pole cores 20, and the positioning baffles 50 are used for limiting the permanent magnet 30 in the axial direction of the rotor frame 10. The permanent magnets 30 are mainly fixed by the extrusion of two adjacent magnetic pole iron cores 20, and the positioning baffle plates 50 are arranged at two ends of the permanent magnets 30 in the axial direction of the rotor support 10 in a blocking manner, so that the positions of the permanent magnets 30 are limited, and the permanent magnets 30 are prevented from being separated.
Specifically, the positioning baffle 50 may also be disposed corresponding to a plurality of magnetic pole cores 20, wherein the number of magnetic pole cores 20 corresponding to the positioning baffle 50 and the number of magnetic pole cores 20 corresponding to the magnetism isolating baffle 40 may be the same or different. Namely: when the length range of one baffle corresponds to 3 pole cores 20, the magnetic isolation baffle 40 can correspond to 3 or 5 pole cores 20, and the number of the pole cores 20 corresponding to the baffle and the magnetic isolation baffle 40 is not related.
In some embodiments, the positioning baffle 50 may be mounted as shown in fig. 1 and 3. Referring to fig. 1 and 3, the core key 21 is provided with a second mounting hole 23 parallel to the axial direction of the rotor bracket 10, and the positioning baffle 50 is provided with a connecting portion matched with the second mounting hole 23. Although the second mounting hole 23 and the first mounting hole 22 are both disposed on the iron core key 21, they are not communicated with each other, and the second mounting hole 23 is also disposed on the iron core key 21, so as to avoid the connection between the positioning baffle 50 and the magnetic pole iron core 20, which is worn and needs to be replaced, and the replacement of the iron core key 21 is lower in cost compared with the replacement of the magnetic pole iron core 20.
In some embodiments, the positioning baffle 50 may be mounted as shown in fig. 1 and 3. Referring to fig. 1 and 3, the connecting portion is fixedly disposed on the positioning baffle 50 and is in interference fit with the second mounting hole 23; or the connecting part can be detachably arranged on the positioning baffle 50 and is in threaded fit with the second mounting hole 23. When the connecting part is fixedly arranged on the positioning baffle 50, the connecting part is a conical cylinder or a cylinder, and when the connecting part is installed, the conical cylinder or the cylinder on the positioning baffle 50 corresponds to the second installation hole 23, and the connecting part is matched with the second installation hole 23 in a knocking mode or the like; when the connecting portion can be dismantled and locate positioning baffle 50, connecting portion are the screw, correspond second mounting hole 23 with the baffle after, screw up the screw and realize positioning baffle 50's fixed.
In this embodiment, the fixed of baffle is realized to different connected mode, and connected mode is simple, and the connection effect is firm, convenient operation.
It should be noted that, because the positioning baffle 50 corresponds to the plurality of magnetic pole cores 20, when the positioning baffle 50 is installed, the positioning baffle 50 and the second installation holes 23 at the first end and the last end in the length range thereof need to be fixed, which is convenient for installation.
In some embodiments, the permanent magnet 30 may be configured as shown in fig. 1-4 for restraining. Referring to fig. 1 to 4, the inner and outer rings of the pole core 20 are each provided with a limit step 24, and the limit steps 24 are used to define the position of the permanent magnet 30 in the radial direction of the rotor frame 10. The permanent magnet 30 is mainly fixed by the extrusion of two adjacent magnetic pole iron cores 20, and the position of the permanent magnet 30 is limited by arranging the limiting step 24, so that the permanent magnet 30 is prevented from being separated.
It should be noted that the positioning baffle 50 and the limiting step 24 may be disposed separately or together, and when the positioning baffle 50 and the limiting step 24 are disposed, the permanent magnet 30 is limited in both the axial direction and the radial direction of the rotor support 10, so as to improve the firmness of fixing the permanent magnet 30.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A rotor unit is characterized by comprising an annular rotor support, and magnetic pole iron cores and permanent magnets which are alternately arranged on the outer ring of the rotor support around the axis of the rotor support, wherein two adjacent magnetic pole iron cores are extruded on two sides of the permanent magnets, and the peripheral surfaces of the magnetic pole iron cores are higher than the peripheral surfaces of the permanent magnets;
the inner ring of the rotor support is provided with a connecting piece for fixing the magnetic pole iron core, the rotor support is also provided with a mounting plate for being connected with a motor rotating shaft, and the mounting plate is positioned on one side, close to the motor rotating shaft, of the connecting piece.
2. A rotor unit according to claim 1, wherein the mounting plate is provided with a reinforcement rib on a side thereof adjacent to the connector, the reinforcement rib being connected between the mounting plate and the rotor frame.
3. A rotor unit according to claim 2, wherein the ribs are distributed evenly around the axis of the rotor support.
4. The rotor unit according to claim 1, wherein the pole core is provided with a core key extending therethrough in a direction parallel to an axial direction of the rotor holder, the core key is provided with a first mounting hole connected to the connecting member, the pole core is provided with a first through hole coaxially provided with the first mounting hole, and the connecting member is fitted to the first mounting hole through the first through hole.
5. A rotor unit according to claim 4, characterised in that the connection is a bolt and that a resilient washer is provided between the bolt and the rotor support.
6. The rotor unit according to claim 4, wherein a magnetic isolation baffle is further disposed between the pole cores and the rotor frame, each magnetic isolation baffle is disposed corresponding to a plurality of the pole cores, and the magnetic isolation baffle is provided with a second through hole for the connection member to pass through.
7. The rotor unit according to claim 4, wherein two axial ends of the core key are respectively provided with a positioning baffle, each positioning baffle is arranged corresponding to a plurality of the magnetic pole cores, and the positioning baffles are used for limiting the permanent magnet in the axial direction of the rotor bracket.
8. The rotor unit according to claim 7, wherein the core key is provided with a second mounting hole parallel to the axial direction of the rotor frame, and the positioning baffle is provided with a connecting portion engaged with the second mounting hole.
9. The rotor unit according to claim 8, wherein the connecting portion is fixedly arranged on the positioning baffle and is in interference fit with the second mounting hole;
or the connecting part is detachably arranged on the positioning baffle and is in threaded fit with the second mounting hole.
10. A rotor unit according to claim 1, characterised in that the inner and outer rings of the pole core are each provided with a limiting step for limiting the position of the permanent magnet in the radial direction of the rotor support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122340918.9U CN215990360U (en) | 2021-09-26 | 2021-09-26 | Rotor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122340918.9U CN215990360U (en) | 2021-09-26 | 2021-09-26 | Rotor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215990360U true CN215990360U (en) | 2022-03-08 |
Family
ID=80509926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122340918.9U Active CN215990360U (en) | 2021-09-26 | 2021-09-26 | Rotor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215990360U (en) |
-
2021
- 2021-09-26 CN CN202122340918.9U patent/CN215990360U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Rotor unit Effective date of registration: 20220507 Granted publication date: 20220308 Pledgee: Bank of China Limited Shijiazhuang Gaocheng sub branch Pledgor: HEBEI NEWSTAR ELECTRIC MOTOR Co.,Ltd. Registration number: Y2022130000030 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20230710 Granted publication date: 20220308 Pledgee: Bank of China Limited Shijiazhuang Gaocheng sub branch Pledgor: HEBEI NEWSTAR ELECTRIC MOTOR Co.,Ltd. Registration number: Y2022130000030 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Rotor unit Effective date of registration: 20230711 Granted publication date: 20220308 Pledgee: Bank of China Limited Shijiazhuang Gaocheng sub branch Pledgor: HEBEI NEWSTAR ELECTRIC MOTOR Co.,Ltd. Registration number: Y2023980048157 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |