CN213305078U

CN213305078U - Motor and rotor assembly thereof

Info

Publication number: CN213305078U
Application number: CN202022141975.XU
Authority: CN
Inventors: 廖国洪
Original assignee: Shenzhen Topband Co Ltd
Current assignee: Shenzhen Topband Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-05-28
Anticipated expiration: 2030-09-24

Abstract

The utility model relates to a motor and a rotor assembly thereof, the rotor assembly comprises a rotor core, a rotating shaft which is arranged on the rotor core in a penetrating way and penetrates out from two ends of the rotor core, and a plurality of magnetic steels which are attached to the peripheral wall of the rotor core along the circumferential direction; the rotor iron core comprises a columnar iron core body; the peripheral wall of the iron core body is provided with a plurality of limiting convex strips, the limiting convex strips are arranged at intervals along the circumferential direction of the iron core body, and mounting grooves for mounting the magnetic steel are formed at intervals between two adjacent limiting convex strips; the mounting groove with the department of meeting of spacing sand grip is equipped with antimagnetic groove. This rotor subassembly sets up antimagnetic groove through the department of meeting at mounting groove and spacing boss to reduce the magnetic field effect that the magnet steel received stator winding and produced, and then reducible influence to the whole magnetism of magnet steel, improve the performance and the life of motor.

Description

Motor and rotor assembly thereof

Technical Field

The utility model relates to a motor, more specifically say, relate to a motor and rotor subassembly thereof.

Background

In the use process of a motor in the related technology, the edge part of magnetic steel in a motor rotor is influenced by a magnetic field generated by a stator winding, so that the demagnetization phenomenon is easy to occur, the strength of the magnetic fields is stronger at the position closer to the center of a coil, and the edge part of the magnetic steel in the motor rotor is also larger due to the fact that the edge part is closest to the center of a stator coil, so that the influence of the demagnetization magnetic field is larger, the overall magnetism of the magnetic steel is influenced, the performance of the motor is influenced, and the service life of the motor is shortened.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in providing a modified rotor subassembly, further provides a modified motor.

The utility model provides a technical scheme that its technical problem adopted is: constructing a rotor assembly, which comprises a rotor core, a rotating shaft and a plurality of magnetic steels, wherein the rotating shaft penetrates through the rotor core and penetrates out of two ends of the rotor core, and the plurality of magnetic steels are attached to the outer peripheral wall of the rotor core along the circumferential direction;

the rotor iron core comprises a columnar iron core body; the peripheral wall of the iron core body is provided with a plurality of limiting convex strips, the limiting convex strips are arranged at intervals along the circumferential direction of the iron core body, and mounting grooves for mounting the magnetic steel are formed at intervals between two adjacent limiting convex strips;

the mounting groove with the department of meeting of spacing sand grip is equipped with antimagnetic groove.

Preferably, the anti-magnetic slot is arranged along the longitudinal extension of the iron core body.

Preferably, the antimagnetic slot is in a half arc shape.

Preferably, the radius of the antimagnetic groove is 0.5-0.8 mm.

Preferably, the distance from the center line of the antimagnetic groove to the center line of the antimagnetic groove on the other side of the limit convex strip adjacent to the antimagnetic groove is 0.4-0.8.

Preferably, the ratio of the polar arc coefficient correspondingly arranged in the mounting groove to the polar arc coefficient between the two adjacent limiting convex strips is 0.8-0.9.

Preferably, an integral structure is formed between the iron core body and the rotating shaft through filling colloid materials.

Preferably, a central through hole is longitudinally formed in the iron core body;

the iron core body is provided with a plurality of filling channels which are communicated with the central through hole and are filled with the colloid material; the filling channels are arranged at intervals along the circumferential direction of the central through hole;

the filling channel comprises a first channel and a second channel, wherein the first channel is arranged along the longitudinal direction of the iron core body in a penetrating mode, and the second channel is communicated with the first channel and the central through hole.

Preferably, the iron core body comprises a plurality of silicon steel sheets; a plurality of silicon steel sheets are stacked in sequence along the longitudinal direction.

The utility model discloses still construct a motor, include the utility model rotor subassembly and with rotor subassembly complex motor.

Implement the utility model discloses a motor and rotor subassembly thereof has following beneficial effect: this rotor subassembly sets up antimagnetic groove through the department of meeting at mounting groove and spacing boss to reduce the magnetic field effect that the magnet steel received stator winding and produced, and then reducible influence to the whole magnetism of magnet steel, improve the performance and the life of motor.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic structural view of a rotor core of a rotor assembly of an electric machine according to some embodiments of the present invention;

FIG. 2 is a top view of the rotor core shown in FIG. 1;

FIG. 3 is a schematic view of the rotor core shown in FIG. 1 in a state of being fitted with magnetic steel;

fig. 4 is a schematic structural view of magnetic steel of the rotor assembly shown in fig. 1.

Detailed Description

In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Fig. 1 shows some preferred embodiments of the electric machine of the invention. The motor can be used as a driving mechanism to drive the external equipment to rotate. The motor may be a permanent magnet motor. The motor has the advantages of good performance and long service life.

Further, in some embodiments, the electric machine may include a rotor assembly, and a stator assembly cooperating with the rotor assembly. The rotor assembly can output power through rotation, and the stator assembly can generate an electromagnetic field in a power-on state to drive the rotor assembly to rotate.

Further, as shown in fig. 1 and 2, in some embodiments, the rotor assembly may include a rotor core 10, a rotating shaft 20, and magnetic steel 30. The rotor core 10 may be in a cylindrical shape, and the rotating shaft 20 may be disposed on the rotor core 10 and penetrate out from two ends of the rotor core 10, which may be used to output power to drive an external device to rotate. The magnetic steel 30 may be multiple, and in some embodiments, the multiple magnetic steels 30 may be disposed at intervals along the outer circumferential wall of the rotor core 10, and may be attached to the outer circumferential wall of the rotor core 10.

Further, in some embodiments, the rotor core 10 may include a core body 11, a central through hole 12. The iron core body 11 can be a column, the iron core body 11 can include a plurality of silicon steel sheets 11 a; can be formed by sequentially stacking the plurality of silicon steel sheets 11a in the longitudinal direction. The silicon steel sheets 11a can be optimized and lightened, and the loss of the whole motor can be reduced. The central through hole 12 may be disposed through the core body 11 along a longitudinal direction of the core body 11. In some embodiments, the inner diameter of the central through hole 12 may be slightly larger than the outer diameter of the rotating shaft 20.

Further, in some embodiments, a plurality of filling channels 13 may be disposed on the core body 11, the plurality of filling channels 13 may be disposed at intervals along the circumferential direction of the central through hole, and each filling channel 13 is communicated with the central through hole 12, and the filling channels 13 may be used for filling with a colloid material so as to facilitate the connection of the rotating shaft 20 and the core body 11 into an integrated structure. In some embodiments, the filling channel 13 may be shaped. In some embodiments, the filling channel 13 may include a first channel 131 and a second channel 132, the first channel 131 may be disposed through the core body 11 in a longitudinal direction, and the first channel 131 may have a cylindrical shape. The second channel 132 may be disposed through the core body 11 in a longitudinal direction, and may be used to communicate the first channel 131 with the second channel 132. The second channel 132 may be a rectangular parallelepiped. The filling channel 13 can not only be filled with colloidal material, but also reduce the weight of the rotor core 11, and prevent the rotating shaft from damaging the silicon steel sheet 11a, thereby avoiding the deformation of the silicon steel sheet 11 a. In some embodiments, the core body 11 and the rotating shaft 20 are formed into an integral structure by filling a colloid material, so that the concentricity of the core 11 and the rotating shaft 20 can be enhanced, the insulating property of the rotating shaft can be improved, and the overall vibration and noise of the motor can be reduced. It will be appreciated that in some embodiments, the glue material may be a high temperature glue, and in particular, a high temperature epoxy glue.

Further, in some embodiments, the peripheral wall of the core body 11 is further provided with a plurality of limiting protruding strips 14, the limiting protruding strips 14 may be disposed at intervals along the circumferential direction of the core body 11, a side surface of the limiting protruding strip 14 disposed at a side away from the core body 11 may be an arc surface, and the limiting protruding strip 14 may be used to limit the magnetic steel 30, and may form a salient pole structure of the core body 11. In some embodiments, the interval between two adjacent limiting convex strips 14 can form a mounting groove 16, and the mounting groove 16 can be used for mounting the magnetic steel 30. The bottom surface of the mounting groove 16 may be an arc surface, and may be attached to the magnetic steel 30.

As shown in fig. 1 to fig. 3, further, in some embodiments, an anti-magnetic slot 15 may be disposed at a joint of the mounting groove 16 and the limiting protruding strip 14, and the anti-magnetic slot 15 may reduce a magnetic field generated by the stator winding at an edge portion of the magnetic steel 30, so as to reduce an influence on the overall magnetism of the magnetic steel 30, and improve performance and service life of the motor. In some embodiments, the diamagnetic slots 15 can be disposed along the longitudinal extension of the core body 11. In some embodiments, the diamagnetic groove 15 can be in a semi-arc shape, and specifically, the diamagnetic groove 15 can be in a semi-arc shape with a radius of 0.5-0.8 mm. In some embodiments, the distance W from the center line of the diamagnetic groove 15 to the center line of the diamagnetic groove 15 on the other side of the limit convex strip 14 adjacent to the diamagnetic groove 15 is 0.4-0.8.

Further, in some embodiments, the ratio θ/β of the polar arc coefficient correspondingly arranged in the mounting groove 16 to the polar arc coefficient between the two adjacent limiting convex strips 14 is 0.8-0.9, so that the ratio of the average value to the maximum value of the induction intensity of each air gap can be controlled within a certain range, and the waveform of the back electromotive force of the motor can be effectively enabled to tend to a sine wave or a sine-like wave.

As shown in fig. 4, further, in some embodiments, the magnetic steel 30 may be a permanent magnet, and the magnetic steel 30 may be tile-shaped, and include an inner surface and an outer surface, where the inner surface of the magnetic steel 30 is an inner concave arc surface, and the outer surface of the magnetic steel 30 is an outer convex arc surface. The radian of the inner surface and the outer surface of the magnetic steel 30 is 90 degrees.

It is to be understood that the foregoing examples merely represent preferred embodiments of the present invention, and that the description thereof is more specific and detailed, but not intended to limit the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. The rotor assembly is characterized by comprising a rotor core (10), a rotating shaft (20) which penetrates through the rotor core (10) and penetrates out of two ends of the rotor core (10), and a plurality of magnetic steels (30) which are attached to the outer peripheral wall of the rotor core (10) along the circumferential direction;

the rotor core (10) comprises a columnar core body (11); the peripheral wall of the iron core body (11) is provided with a plurality of limiting convex strips (14), the limiting convex strips (14) are arranged at intervals along the circumferential direction of the iron core body (11), and mounting grooves (16) for mounting the magnetic steel (30) are formed at intervals between two adjacent limiting convex strips (14);

and the joint of the mounting groove (16) and the limiting convex strip (14) is provided with an antimagnetic groove (15).

2. The rotor assembly according to claim 1, wherein the antimagnetic slot (15) is disposed along a longitudinal extension of the core body (11).

3. The rotor assembly according to claim 1, wherein the antimagnetic slot (15) is semi-arc shaped.

4. The rotor assembly according to claim 3, wherein the diamagnetic grooves (15) have a radius of 0.5-0.8 mm.

5. The rotor assembly according to claim 3, wherein the distance from the center line of the antimagnetic groove (15) to the center line of the antimagnetic groove (15) on the other side of the limit rib (14) adjacent to the center line of the antimagnetic groove is 0.4-0.8.

6. The rotor assembly according to claim 1, wherein the ratio of the polar arc coefficient of the corresponding mounting groove (16) to the polar arc coefficient between two adjacent limiting convex strips (14) is 0.8-0.9.

7. The rotor assembly according to claim 1, wherein the core body (11) and the rotating shaft (20) are integrally formed by filling a colloid material.

8. The rotor assembly according to claim 7, wherein the core body (11) is provided with a central through hole (12) along a longitudinal direction;

a plurality of filling channels (13) which are communicated with the central through hole (12) and are used for filling the colloid material are arranged on the iron core body (11); the filling channels (13) are arranged at intervals along the circumferential direction of the central through hole;

the filling channel (13) comprises a first channel (131) which is arranged in a penetrating mode along the longitudinal direction of the iron core body (11) and a second channel (132) which is communicated with the first channel (131) and the central through hole (12).

9. The rotor assembly according to claim 1, wherein the core body (11) comprises a plurality of silicon steel sheets (11 a); a plurality of silicon steel sheets (11a) are stacked in order in the longitudinal direction.

10. An electrical machine comprising a rotor assembly as claimed in any one of claims 1 to 9, and an electrical machine cooperating with the rotor assembly.