CN216356164U

CN216356164U - Prefabricated rotor punching, rotor subassembly, motor and electrical equipment

Info

Publication number: CN216356164U
Application number: CN202123187135.8U
Authority: CN
Inventors: 屈欢; 诸自强; 李文瑞; 吴越虹; 甘磊; 周一恒; 李俊龙
Original assignee: Midea Welling Motor Technology Shanghai Co Ltd; Huaian Welling Motor Manufacturing Co Ltd
Current assignee: Midea Welling Motor Technology Shanghai Co Ltd; Huaian Welling Motor Manufacturing Co Ltd
Priority date: 2021-12-17
Filing date: 2021-12-17
Publication date: 2022-04-19
Anticipated expiration: 2031-12-17

Abstract

The utility model provides a prefabricated rotor punching sheet, a rotor assembly, a motor and electrical equipment, wherein the prefabricated rotor punching sheet comprises: the bar is towards piece, and the bar is towards piece including: at least two magnetic conduction parts are arranged at intervals along the length direction of the strip-shaped punching sheet; the connecting part is connected between two adjacent magnetic conduction parts; the magnetic conduction parts and the connecting parts are alternately distributed in the length direction of the strip-shaped punching sheet. The utility model can reduce the cost of the prefabricated rotor punching sheet and the motor applying the prefabricated rotor punching sheet, ensures that the excircle of the rotor core formed by the prefabricated rotor punching sheet is more regular, ensures that the air gap between the rotor assembly and the stator assembly is uniform, and further avoids the phenomenon of vibration noise deterioration of the motor.

Description

Prefabricated rotor punching, rotor subassembly, motor and electrical equipment

Technical Field

The utility model relates to the technical field of prefabricated rotor punching plates, in particular to a prefabricated rotor punching plate, a rotor assembly, a motor and electrical equipment.

Background

In the related art, a part of the rotor core is formed by punching, so that waste is caused to the core material, and the utilization rate of the core is low.

In the related art, a part of the motor employs a block type rotor, but the additional air gap is generated and the rigidity of the rotor is insufficient, so that the electromagnetic performance and vibration noise of the motor are deteriorated. Meanwhile, the outer circle of the block type rotor is easy to be uneven and easy to deform, so that an air gap between the stator structure and the rotor is uneven, and vibration noise is further deteriorated.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to solving at least one of the problems of the prior art.

To this end, the utility model provides in a first aspect a prefabricated rotor sheet.

A second aspect of the utility model provides a rotor assembly.

A third aspect of the utility model provides an electric machine.

A fourth aspect of the utility model provides an electrical appliance.

The utility model provides a prefabricated rotor punching sheet in a first aspect, which comprises: the bar is towards piece, and the bar is towards piece including: at least two magnetic conduction parts are arranged at intervals along the length direction of the strip-shaped punching sheet; the connecting part is connected between two adjacent magnetic conduction parts; the magnetic conduction parts and the connecting parts are alternately distributed in the length direction of the strip-shaped punching sheet.

The prefabricated rotor punching sheet provided by the utility model can be used for manufacturing a rotor assembly. The prefabricated rotor punching sheet comprises a strip punching sheet; in the use, the bar is towards piece can the annular rotor core of bending formation.

In addition, the strip punching sheet comprises at least two magnetic conduction parts and a connecting part arranged between the two adjacent magnetic conduction parts. The magnetic conduction parts and the connecting parts are alternately distributed in the length direction of the strip-shaped punching sheet, and then the two adjacent magnetic conduction parts are connected into a whole through the connecting parts. In the assembling process of the rotor assembly, the strip-shaped punching sheets can be connected end to form an annular rotor core. In addition, two adjacent magnetic conduction parts can be connected through a magnetic conduction piece or a non-magnetic conduction piece.

Particularly, in the prefabricated rotor punching sheet provided by the utility model, the annular rotor core can be formed by bending the strip punching sheet, and compared with a stamped rotor core adopted in the related art, the prefabricated rotor punching sheet provided by the utility model has the advantages that the size of a die in the preparation process of the rotor core can be reduced, the utilization rate of raw materials for manufacturing the rotor core is improved (for example, the utilization rate of silicon steel materials is improved), the prefabricated rotor punching sheet is more suitable for large-scale production, and the cost of the rotor core and a motor using the rotor core can be reduced. In addition, form annular rotor core through end-to-end connection's mode, can reduce rotor core's the manufacturing degree of difficulty, promote rotor core's production efficiency, further reduce rotor core's cost.

Furthermore, in the prefabricated rotor punching sheet provided by the utility model, the annular rotor core can be formed in a mode of bending the strip-shaped punching sheet, and compared with the block-type rotor core adopted in the related technology, the prefabricated rotor punching sheet provided by the utility model can ensure that an air gap is formed between a rotor assembly and a stator assembly in a motor applying the rotor core, and the rotor core has enough rigidity, thereby ensuring the electromagnetic performance of the motor and avoiding the phenomenon of vibration noise deterioration of the motor. In addition, the utility model can ensure that the shape of the rotor core is more regular and is not easy to deform, thereby ensuring that the excircle of the rotor core is more regular, ensuring that the air gap between the rotor assembly and the stator assembly is uniform, and further avoiding the phenomenon of vibration noise deterioration of the motor.

In some possible designs, the connection is a flexible connection.

In this design, the connection is a flexible connection; the flexible connection portion itself has the ability to be deformed by bending. Like this, at the in-process of making rotor core, the accessible is buckled the mode of flexible connecting portion and is made the bar towards the piece and take place deformation, and then forms annular rotor core through the bar towards the piece.

In some possible designs, the connecting portion includes a bent portion, and portions of the connecting portion located at both sides of the bent portion are rotatably connected by the bent portion.

In this design, the connection portion includes a bent portion. Wherein, the kink sets up in the middle part of connecting portion to the part connecting portion that are located kink both sides pass through the kink and rotate the connection. Like this, at the in-process of making rotor core, the accessible is buckled the mode of kink and is made the bar towards the piece and take place deformation, and then forms annular rotor core through the bar towards the piece.

In some possible designs, the strip-shaped punching sheet further comprises: the first connecting part is arranged on the magnetic conducting part at one end of the strip-shaped punching sheet in the length direction; the second connecting portion set up in the magnetic conduction portion of the length direction's the other end of bar towards the piece, and first connecting portion can be connected with the second connecting portion.

In the design, the strip-shaped punching sheet further comprises a first connecting portion and a second connecting portion. Wherein, in the length direction of the bar punching sheet, first connecting portion and second connecting portion set up respectively in two magnetic conduction portions at both ends (specifically, first connecting portion set up in the length direction's of bar punching sheet one end on one magnetic conduction portion, the second connecting portion set up in the length direction's of bar punching sheet one end on one magnetic conduction portion). Like this, at the in-process of making rotor core, the cooperation of the first connecting portion of accessible and second connecting portion couples together two magnetic conduction portions at bar towards piece both ends, and then forms annular rotor core.

Specifically, the structures of the first connecting portion and the second connecting portion match, and the first connecting portion and the second connecting portion can be interlocked.

In some possible designs, one of the first connecting portion and the second connecting portion is a convex portion, and the other is a concave portion.

In this design, one of the first and second connection portions is a convex portion, and the other is a concave portion. In addition, the convex and concave portions can be well fitted. Therefore, on one hand, the convex part and the concave part can play a role in positioning, the installation is convenient, the installation efficiency is improved, and the installation time is saved. On the other hand, the two magnetic conduction parts at the two end parts of the strip-shaped punching sheet can be ensured to be relatively fixed after being connected through the convex part and the concave part.

In some possible designs, the recess includes at least one of: polygonal groove, circular groove, elliptical groove; the shape of the convex part is matched with that of the concave part.

In the design, the shape of the convex part is matched with that of the concave part, the convex part and the concave part can be detachably connected, and the self-locking function is realized. Specifically, the concave portion includes, but is not limited to, polygonal grooves, circular grooves, elliptical grooves; the shape of the convex portion matches the shape of the concave portion.

In some possible designs, the strip-shaped punching sheet further comprises: and the magnet groove is positioned between two adjacent magnetic conduction parts and is used for accommodating the permanent magnet.

In this design, the strip-shaped stamped piece further comprises a magnet slot. The magnetic slots are positioned between the two adjacent magnetic conduction parts, and the permanent magnet of the rotor assembly can be placed in the using process, so that the rotor assembly is matched with the stator assembly for use.

In this design, further, the connecting portion is located at a first end of the magnet slot, and a second end of the magnet slot is disposed to be open. Therefore, two adjacent magnetic conduction parts can be connected through the connecting part, and the permanent magnet can be placed in the magnet groove lightly.

A second aspect of the present invention provides a rotor assembly comprising: the rotor core is annular and is formed by connecting the prefabricated rotor punching sheets in the first aspect of the utility model end to end.

The rotor assembly provided by the utility model comprises a rotor core, and the rotor core is formed by connecting prefabricated rotor punching sheets in an end-to-end mode according to the first aspect of the utility model. Therefore, the prefabricated rotor punching sheet has all the beneficial effects.

In some possible designs, the rotor core includes a strip of laminations.

In this design, the rotor core includes a strip of laminations. Therefore, in the process of manufacturing the rotor core, the strip-shaped punching sheets can be connected end to form the annular rotor core.

In some possible designs, the rotor core includes at least two strip-shaped stamped sheets, and the at least two strip-shaped stamped sheets are sequentially connected end to end.

In this design, the rotor core includes at least two strip-shaped laminations. Therefore, in the process of manufacturing the rotor core, at least two strip-shaped punching sheets can be sequentially connected end to form the annular rotor core.

In some possible designs, the rotor assembly further comprises: and the permanent magnets are arranged in the magnet grooves of the rotor punching sheet, and the polarities of the two adjacent permanent magnets are opposite.

In this design, the rotor assembly also includes permanent magnets. The permanent magnet is arranged in a magnet groove of the rotor punching sheet and positioned between two adjacent magnetic conduction parts. In addition, the polarities of two adjacent permanent magnets are opposite, and a magnetism gathering effect is formed.

In this design, further, the permanent magnets may be arranged in a built-in spoke type magnet arrangement or a built-in V-shaped magnet arrangement.

In some possible designs, the rotor assembly further comprises: the first spacing portion is arranged on the magnetic conduction portion and used for spacing the permanent magnet.

In this design, the rotor assembly further includes a first limit portion. The first limiting part is arranged on the magnetic conduction part and is positioned at the opening end of the magnet groove; in addition, the first limiting part protrudes out of the side wall of the magnetic conduction part. Like this, in the rotor subassembly use, the permanent magnet that is located the magnet inslot can be injectd through first spacing portion, and then has guaranteed that the permanent magnet temperature is in the magnet groove, has reduced the possibility that the permanent magnet drops from the magnet groove.

In this design, further, the first position-limiting portion is a protruding structure. That is, the side wall of the magnetic conduction part is provided with the protruding structure, so that the permanent magnet is limited at the opening end of the magnet groove through the protruding structure.

In the design, further, the first limiting part and the magnetic conduction part are of an integrated structure. Therefore, the assembling process of the rotor assembly can be simplified, and the connecting strength between the first limiting part and the magnetic conduction part can be ensured.

In some possible designs, the rotor assembly further includes a rotating shaft, and the rotating shaft penetrates through the rotor core and is connected with the rotor core.

In this design, the rotor assembly further includes a shaft. Wherein, the rotating shaft is arranged through the rotor core and is connected with the rotor core. Therefore, when the motor applying the rotor assembly runs, the rotor assembly can drive the rotating shaft to rotate so as to output torque.

In some possible designs, the rotating shaft comprises a second limiting part, and the second limiting part protrudes out of the radial direction of the rotating shaft; the inner wall of the magnet groove is provided with a third limiting part, and at least one part of the third limiting part extends into the magnet groove and is connected with the second limiting part.

In this design, the pivot includes the spacing portion of second, and the inner wall in magnet groove is provided with the spacing portion of third. In addition, the second limiting part protrudes out of the radial direction of the rotating shaft, and at least one part of the second limiting part extends into the magnet groove and is connected with the third limiting part. Like this, through the cooperation of the spacing portion of second and the spacing portion of third, can further promote the joint strength between pivot and the rotor core to guarantee pivot and rotor core's firm in connection nature.

In some possible designs, the second limiting portion is a limiting groove, and the second limiting portion includes: the extension part is arranged in a protruding mode in the radial direction of the rotating shaft, and the end part of the extension part extends into the magnet groove; and the limiting protrusion is arranged at the end part of the extending part and is connected with the limiting groove.

In this design, the spacing portion of second is spacing recess, and spacing recess is sunken in the lateral wall setting of magnetic conduction portion. In addition, the second limiting part comprises an extending part and a limiting bulge; the first end of the extension part is arranged in the radial direction of the rotating shaft, and the second end of the extension part extends into the magnet groove; the limiting protrusion is arranged at the second end of the extension part and protrudes out of the extension part. In addition, spacing arch and spacing recess's structure looks adaptation to make spacing arch be connected with spacing recess, and then through the cooperation of spacing arch with spacing recess, guarantee pivot and rotor core's fastness of being connected.

A third aspect of the present invention provides an electric machine comprising: a stator assembly; a rotor assembly according to the second aspect of the present invention.

The utility model provides an electric machine comprising a rotor assembly as set forth in the second aspect of the utility model. Thus, the full benefits of the rotor assembly described above are present and will not be discussed in detail herein.

In addition, the motor further comprises a stator assembly, and the stator assembly is matched with the rotor assembly to output torque.

In some possible designs, the stator assembly includes: the stator teeth, there are stator slots between two adjacent stator teeth; the winding is wound on the stator teeth and positioned in the stator slot; wherein the number Nr of magnet slots, the number Ns of stator slots, and the number Pa of pole pairs of windings of the rotor assembly satisfy: pa ═ Nr/2. + -. Ns |.

In this design, the stator assembly includes a stator core including stator teeth and stator slots located between two adjacent stator teeth; the stator assembly further includes windings wound around the stator teeth and positioned within the stator slots.

In this design, further, the number Nr of magnet slots of the rotor assembly, the number Ns of stator slots, and the number Pa of pole pairs of the winding satisfy: pa ═ Nr/2. + -. Ns |. Therefore, new harmonic components in the air gap flux density can be used as the working harmonic of the motor to provide output torque for the motor, so that the torque density of the motor is effectively improved, and the efficiency of the motor is further improved. Specifically, the number of magnet slots is equal to the number of permanent magnets.

In the design, the winding is further centralized winding, so that winding is facilitated, and the production efficiency of the motor is further improved.

A fourth aspect of the present invention provides an electric apparatus, including: the electric machine according to the third aspect of the utility model.

The electric appliance provided by the utility model comprises the motor of the third aspect. Thus, the overall benefits of the motor described above are achieved and will not be discussed in detail here.

Specifically, the electrical equipment provided by the utility model can be products such as refrigerators, washing machines, air conditioners and the like.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a rotor core according to an embodiment of the present invention;

FIG. 2 is one of the schematic structural views of a prefabricated rotor lamination of one embodiment of the present invention;

FIG. 3 is a second schematic structural view of a prefabricated rotor lamination according to an embodiment of the present invention;

FIG. 4 is a third schematic structural view of a prefabricated rotor lamination according to an embodiment of the present invention;

FIG. 5 is a fourth schematic structural view of a prefabricated rotor lamination of one embodiment of the present invention;

FIG. 6 is a fifth schematic structural view of a prefabricated rotor lamination of one embodiment of the present invention;

FIG. 7 is an enlarged view of a portion of the prefabricated rotor segment shown in FIG. 6 at C;

FIG. 8 is one of the structural schematic views of a rotor assembly of one embodiment of the present invention;

FIG. 9 is a second schematic structural view of a rotor assembly in accordance with an embodiment of the present invention;

FIG. 10 is a schematic view of the construction of the central axis of the rotor assembly shown in FIG. 9;

fig. 11 is a schematic view of a stator assembly in an electric machine according to an embodiment of the present invention.

Wherein, the correspondence between the reference numbers and the part names in fig. 1 to 11 is:

100 prefabricated rotor punching sheets, 102 strip-shaped punching sheets, 104 magnetic conduction parts, 106 connecting parts, 108 first connecting parts, 110 second connecting parts, 112 magnet grooves, 114 permanent magnets, 116 first limiting parts, 118 second limiting parts, 120 third limiting parts, 122 extending parts, 124 limiting protrusions, 126 rotating shafts, 128 rotor cores, 130 stator components, 132 stator teeth, 134 stator grooves, 136 windings, 138 stator secondary teeth and 142 stator cores.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as specifically described herein, and thus the scope of the present invention is not limited by the specific embodiments disclosed below.

Prefabricated rotor sheets 100, a rotor assembly, a motor and an electrical apparatus provided according to some embodiments of the present invention are described below with reference to fig. 1 to 11. Wherein, a position in fig. 1, 8 and 9 represents a connection position of the strip-shaped punching sheet 102; the connection position of two adjacent strip-shaped punching sheets 102 is indicated at B in fig. 3.

As shown in fig. 1, a prefabricated rotor punching sheet 100 according to a first embodiment of the present invention includes a strip-shaped punching sheet 102; in use, the strip-shaped punching sheet 102 can be bent to form the annular rotor core 128.

As shown in fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the strip-shaped punching sheet 102 includes at least two magnetic conductive portions 104 and a connecting portion 106 disposed between two adjacent magnetic conductive portions 104; the magnetic conduction parts 104 and the connection parts 106 are alternately distributed in the length direction of the strip-shaped punching sheet 102, and then two adjacent magnetic conduction parts 104 are connected into a whole through the connection parts 106.

During assembly of the rotor assembly, the strip-shaped punching sheets 102 may be connected end to form the annular rotor core 128. In addition, two adjacent magnetic conductive portions 104 may be connected by a magnetic conductive member or a non-magnetic conductive member.

In particular, as shown in fig. 1, in the prefabricated rotor sheet 100 provided by the present invention, the annular rotor core 128 may be formed by bending the strip-shaped sheet 102, and compared with a stamped rotor core used in the related art, the present invention can reduce the size of a mold in the process of manufacturing the prefabricated rotor sheet 100, increase the utilization rate of raw materials for manufacturing the prefabricated rotor sheet 100 (for example, increase the utilization rate of silicon steel materials), be more suitable for large-scale production, and reduce the costs of the prefabricated rotor sheet 100 and a motor using the prefabricated rotor sheet 100. In addition, the prefabricated rotor punching sheet 100 is formed in an end-to-end connection mode, the manufacturing difficulty of the prefabricated rotor punching sheet 100 can be reduced, the production efficiency of the prefabricated rotor punching sheet 100 is improved, and the cost of the prefabricated rotor punching sheet 100 is further reduced.

Further, as shown in fig. 1, in the prefabricated rotor sheet 100 provided by the present invention, the annular rotor core 128 may be formed by bending the strip-shaped sheet 102, and compared with the block-type rotor core used in the related art, the present invention can ensure that an air gap is formed between the rotor assembly and the stator assembly 130 in the motor using the prefabricated rotor sheet 100, and ensure that the prefabricated rotor sheet 100 has sufficient rigidity, thereby ensuring the electromagnetic performance of the motor, and avoiding the vibration noise deterioration of the motor. In addition, the utility model can ensure that the shape of the prefabricated rotor punching sheet 100 is more regular and is not easy to deform, thereby ensuring that the excircle of the prefabricated rotor punching sheet 100 is more regular, ensuring that the air gap between the rotor assembly and the stator assembly 130 is uniform, and further avoiding the phenomenon of vibration noise deterioration of the motor.

The second embodiment of the present invention provides a prefabricated rotor punching sheet 100, and on the basis of the first embodiment, further:

the connection 106 is a flexible connection (not shown). The flexible connection portion itself has the ability to be deformed by bending. In this way, as shown in fig. 1, in the process of manufacturing the rotor core 128, the prefabricated rotor sheets 100 may be deformed by bending the flexible connection portions, and then the annular rotor core 128 is formed by the strip-shaped sheets 102.

In addition, the prefabricated rotor punching sheet 100 provided by the embodiment has all the beneficial effects of the prefabricated rotor punching sheet 100 of the first embodiment, the cost of the prefabricated rotor punching sheet 100 and a motor using the prefabricated rotor punching sheet 100 can be reduced, the outer circle of the prefabricated rotor punching sheet 100 is ensured to be more regular, the air gap between the rotor assembly and the stator assembly 130 is ensured to be uniform, and the phenomenon of vibration noise deterioration of the motor is further avoided, which is not discussed in detail herein.

The third embodiment of the present invention provides a prefabricated rotor punching sheet 100, and on the basis of the first embodiment, further:

the connection portion 106 includes a bent portion (not shown). Wherein, the bending part is arranged in the middle of the connecting part 106, and the parts of the connecting part 106 at the two sides of the bending part are rotatably connected by the bending part. In this way, as shown in fig. 1, in the process of manufacturing the rotor core 128, the prefabricated rotor sheets 100 may be deformed by bending the bent portions, and then the annular rotor core 128 is formed by the strip-shaped punching sheets 102.

In addition, the prefabricated rotor punching sheet 100 provided by the embodiment has all the beneficial effects of the rotor assembly of the first embodiment, the cost of the prefabricated rotor punching sheet 100 and a motor using the prefabricated rotor punching sheet 100 can be reduced, the outer circle of the prefabricated rotor punching sheet 100 is ensured to be more regular, the air gap between the rotor assembly and the stator assembly 130 is ensured to be uniform, and the phenomenon of vibration noise deterioration of the motor is further avoided, which is not discussed in detail herein.

The fourth embodiment of the present invention provides a prefabricated rotor punching sheet 100, on the basis of the first, second, and third embodiments, further:

as shown in fig. 1, the prefabricated rotor sheet 100 further includes a first connection portion 108 and a second connection portion 110. In the length direction of the strip-shaped punching sheet 102, the first connecting portion 108 and the second connecting portion 110 are respectively disposed on the two magnetic conductive portions 104 at the two ends. Specifically, the first connection portion 108 is disposed on one magnetic conduction portion 104 at one end of the strip-shaped punching sheet 102 in the length direction, and the second connection portion 110 is disposed on one magnetic conduction portion 104 at one end of the strip-shaped punching sheet 102 in the length direction.

In this way, as shown in fig. 1, in the process of manufacturing the rotor core 128, the two magnetic conductive portions 104 at the two end portions of the strip-shaped punching sheet 102 can be connected by the engagement of the first connecting portion 108 and the second connecting portion 110, and the annular rotor core 128 is formed.

Specifically, as shown in fig. 4, 5, and 6, the structures of the first connection portion 108 and the second connection portion 110 match, and the first connection portion 108 and the second connection portion 110 can interlock.

In this embodiment, as shown in fig. 4, 5 and 6, one of the first connection portion 108 and the second connection portion 110 is a convex portion, and the other is a concave portion. In addition, the convex and concave portions can be well fitted. Therefore, on one hand, the convex part and the concave part can play a role in positioning, the installation is convenient, the installation efficiency is improved, and the installation time is saved. On the other hand, the two magnetic conduction parts 104 at the two end parts of the strip-shaped punching sheet 102 can be ensured to be relatively fixed after being connected through the convex part and the concave part.

In this embodiment, further, as shown in fig. 4, 5 and 6, the shape of the convex part is matched with that of the concave part, and the convex part and the concave part can be detachably connected and have a self-locking function. Specifically, the concave portion includes, but is not limited to, polygonal grooves, circular grooves, elliptical grooves; the shape of the convex portion matches the shape of the concave portion.

The fifth embodiment of the present invention provides a prefabricated rotor punching sheet 100, which further includes, on the basis of the first embodiment, the second embodiment, the third embodiment and the fourth embodiment:

as shown in fig. 1, the prefabricated rotor sheet 100 further includes a magnet slot 112. The magnet slot 112 is located between two adjacent magnetic conductive portions 104, and can place the permanent magnet 114 of the rotor assembly during use, so that the rotor assembly is used in cooperation with the stator assembly 130.

In this embodiment, further, as shown in fig. 2, 3, 4, 5 and 6, the connecting portion 106 is located at a first end of the magnet slot 112, and a second end of the magnet slot 112 is disposed to be open. This ensures that both adjacent magnetic conductive portions 104 are connected by the connecting portion 106 and that the permanent magnet 114 can be placed lightly in the magnet slot 112.

A sixth embodiment of the present invention provides a rotor assembly including a rotor core 128.

In particular, the rotor core 128 is formed by connecting the prefabricated rotor laminations 100 according to the first aspect of the present invention end to end. Therefore, the prefabricated rotor punching sheet 100 has all the beneficial effects.

A seventh embodiment of the present invention provides a rotor assembly, further comprising, in addition to the sixth embodiment:

as shown in fig. 2, the rotor core 128 may include a strip of laminations 102. Thus, during the manufacturing of the rotor core 128, one strip-shaped punching sheet 102 may be connected end to form the annular rotor core 128.

As shown in fig. 3, the prefabricated rotor sheet 100 may include at least two strip-shaped sheets 102. Thus, at least two rotor cores 128 may be sequentially connected end-to-end to form an annular rotor core 128 during the manufacturing of rotor cores 128.

Further, as shown in fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the number of the strip-shaped punching sheets 102 and the length of each strip-shaped punching sheet 102 may be designed according to actual needs.

Under the condition that the radial dimension of the prefabricated rotor punching sheet 100 is large, a plurality of strip punching sheets 102 can be connected end to end, and the length of each strip punching sheet 102 can be designed to be long.

Under the condition that the radial dimension of the prefabricated rotor punching sheet 100 is small, a strip-shaped punching sheet 102 can be connected end to end, and the length of the strip-shaped punching sheet 102 can be designed to be short. Those skilled in the art will appreciate the number of strip stampings 102 and the length of each strip stampings 102.

An eighth embodiment of the present invention provides a rotor assembly, further comprising, in addition to the sixth and seventh embodiments:

as shown in fig. 8 and 9, the rotor assembly further includes permanent magnets 114. Permanent magnets 114 are arranged in the magnet grooves 112 of the prefabricated rotor punching sheet 100 and located between two adjacent magnetic conductive portions 104. In addition, the polarities of the two adjacent permanent magnets 114 are opposite to each other, and a magnetic convergence effect is formed.

In this embodiment, further, the permanent magnets 114 may be provided in a built-in spoke type magnet arrangement or a built-in V-shaped magnet arrangement.

A ninth embodiment of the present invention provides a rotor assembly, further comprising, in addition to the eighth embodiment:

as shown in fig. 5, the prefabricated rotor punching sheet 100 further includes a first limiting portion 116. Wherein, the first position-limiting part 116 is arranged on the magnetic conduction part 104 and is positioned at the opening end of the magnet slot 112; in addition, the first position-limiting portion 116 protrudes from the sidewall of the magnetic conductive portion 104.

Thus, in the use process of the rotor, the permanent magnet 114 positioned in the magnet slot 112 can be limited by the first limiting part 116, so that the temperature of the permanent magnet 114 is ensured to be in the magnet slot 112, and the possibility that the permanent magnet 114 falls off from the magnet slot 112 is reduced.

In this embodiment, as shown in fig. 5, the first position-limiting portion 116 is a protrusion structure. That is, the present invention provides a protrusion structure on the sidewall of the magnetic conductive part 104 to limit the permanent magnet 114 at the opening end of the magnet slot 112 by the protrusion structure.

In this embodiment, as shown in fig. 5, the first position-limiting portion 116 and the magnetic conductive portion 104 are an integrated structure. Therefore, the assembling process of the prefabricated rotor punching sheet 100 can be simplified, and the connection strength between the first limiting part 116 and the magnetic conduction part 104 can be ensured.

In addition, the rotor assembly provided by the embodiment has all the beneficial effects of the prefabricated rotor punching sheet 100 of the first embodiment, the cost of the prefabricated rotor punching sheet 100 and a motor using the prefabricated rotor punching sheet 100 can be reduced, the outer circle of the prefabricated rotor punching sheet 100 is ensured to be more regular, the air gap between the rotor assembly and the stator assembly 130 is ensured to be uniform, and the phenomenon of vibration noise deterioration of the motor is further avoided, which is not discussed in detail herein.

A tenth embodiment of the present invention provides a rotor assembly, further comprising, in addition to the eighth and ninth embodiments:

as shown in fig. 8, 9 and 10, rotor core 128 has an annular structure; the rotor assembly also includes a shaft 126. The rotating shaft 126 penetrates through the prefabricated rotor punching sheet 100 and is connected with the prefabricated rotor punching sheet 100. Thus, when the motor using the rotor assembly operates, the rotor core 128 may rotate the rotating shaft 126 to output torque.

In this embodiment, further, as shown in fig. 10, the rotating shaft 126 includes a second stopper portion 118, and as shown in fig. 6 and 7, the inner wall of the magnet groove 112 is provided with a third stopper portion 120. In addition, the second position-limiting portion 118 protrudes from the radial direction of the rotating shaft 126, and at least a portion of the second position-limiting portion 118 extends into the magnet groove 112 and is connected to the third position-limiting portion 120. In this way, through the cooperation of the second limiting portion 118 and the third limiting portion 120, the connection strength between the rotating shaft 126 and the prefabricated rotor sheet 100 can be further improved, so as to ensure the connection firmness between the rotating shaft 126 and the prefabricated rotor sheet 100.

In this embodiment, further, as shown in fig. 7, the second position-limiting portion 118 is a position-limiting groove, and as shown in fig. 10, the second position-limiting portion 118 includes: an extension part 122 protruding from the radial direction of the rotating shaft 126, wherein the end of the extension part 122 extends into the magnet slot 112; and a limit protrusion 124 disposed at an end of the extension part 122 and connected with the limit groove.

In this embodiment, as shown in fig. 7, the second position-limiting portion 118 is a position-limiting groove, and the position-limiting groove is recessed in the side wall of the magnetic conductive portion 104. Further, as shown in fig. 10, the second stopper portion 118 includes an extended portion 122 and a stopper projection 124124; wherein, a first end of the extension part 122 is arranged in the radial direction of the rotating shaft 126, and a second end of the extension part 122 extends into the magnet slot 112; the limiting protrusion 124 is disposed at the second end of the extension portion 122 and protrudes from the extension portion 122. In addition, spacing arch 124 and spacing recess's structure looks adaptation to make spacing arch 124 be connected with spacing recess, and then through the cooperation of spacing arch 124 with spacing recess, guarantee pivot 126 and rotor core 128's fastness of being connected.

An eleventh embodiment of the present invention provides an electric machine including a stator assembly and a rotor assembly as in any of the above embodiments.

The proposed electrical machine comprises a rotor assembly as proposed in the second aspect of the utility model. Therefore, the rotor assembly has all the advantages of reducing the cost of the prefabricated rotor punching sheet 100 and the motor using the prefabricated rotor punching sheet 100, ensuring that the excircle of the prefabricated rotor punching sheet 100 is more regular, ensuring that the air gap between the rotor assembly and the stator assembly 130 is uniform, and further avoiding the phenomenon of vibration noise deterioration of the motor, which is not discussed in detail herein.

Further, as shown in fig. 11, the motor further includes a stator assembly 130, and the stator assembly 130 is engaged with the rotor assembly to output torque.

A twelfth embodiment of the present invention provides a motor, further comprising, in addition to the eleventh embodiment:

as shown in fig. 11, the stator assembly 130 includes a stator core 142, the stator core 142 includes stator teeth 132 and stator slots 134 between two adjacent stator teeth 132; the stator structure further includes windings 136, the windings 136 being wound around the stator teeth 132 and located within the stator slots 134.

In this embodiment, further, the number Nr of the magnet slots 112, the number Ns of the stator slots 134, and the number Pa of pole pairs of the windings 136 of the rotor assembly satisfy: pa ═ Nr/2. + -. Ns |. Therefore, new harmonic components in the air gap flux density can be used as the working harmonic of the motor to provide output torque for the motor, so that the torque density of the motor is effectively improved, and the efficiency of the motor is further improved. Specifically, the number of magnet slots 112 is equal to the number of permanent magnets 114.

In this embodiment, further, the winding 136 is a concentrated winding 136, so as to facilitate winding, and further improve the production efficiency of the motor.

On the basis of the eleventh embodiment and the twelfth embodiment, further, the motor provided by the utility model is a double-air gap permanent magnet motor. In addition, the double-air-gap permanent magnet motor has the advantages of being suitable for large-scale production, reducing the size of a die and improving the utilization rate of silicon steel materials. Meanwhile, the additional air gap of the motor is smaller, the magnetic leakage is smaller, the integral rigidity of the motor is better, and the roundness is better, so that the vibration noise of the motor is improved.

A thirteenth embodiment of the present invention provides an electric appliance including the motor according to any one of the above embodiments.

The electrical equipment provided by the utility model comprises the motor in any one of the embodiments. Thus, the overall benefits of the motor described above are achieved and will not be discussed in detail here.

In the related art, a part of the rotor core is formed by punching, so that waste is caused to the core material, and the utilization rate of the core is low. In addition, some of the motors in the related art employ a segmented rotor, but the additional air gap generated and the stiffness of the rotor are insufficient to deteriorate the electromagnetic performance and vibration noise of the motor. Meanwhile, the outer circle of the block type rotor is easy to be uneven and easy to deform, so that an air gap between the stator structure and the rotor is uneven, and vibration noise is further deteriorated.

Therefore, as shown in fig. 1, the present invention provides a rotor core 128, a rotor, a motor, and an electrical device, which have the advantages of high mass production efficiency, low vibration noise, and the like.

Specifically, as shown in fig. 2, fig. 3, fig. 4, fig. 5, and fig. 6, the prefabricated rotor sheet 100 provided by the present invention includes a strip-shaped sheet 102, wherein along a length direction of the strip-shaped sheet 102, the strip-shaped sheet 102 sequentially includes a plurality of magnetic conductive portions 104 and a connecting portion 106. The magnetic conductive portions 104 and the connecting portions 106 are sequentially connected and arranged at intervals along the length direction of the strip-shaped punching sheet 102 to form a continuous extension shape along the length direction. The magnetic conductive portion 104 extends along the width direction of the strip-shaped punching sheet 102, and the connecting portion 106 extends along the length direction of the strip-shaped punching sheet 102. In addition, a magnet slot 112 is formed between two adjacent magnetic conductive parts 104, and one end of the magnet slot 112 is open and the other end is closed by the connecting part 106.

Further, as shown in fig. 4, 5 and 6, in the length direction of the strip-shaped punching sheet 102, a first connection portion 108 and a second connection portion 110 with a self-locking function are disposed on the first magnetic conduction portion 104 and the last magnetic conduction portion 104. One of the first connecting portion 108 and the second connecting portion 110 is a convex portion, and the other is a concave portion. Further, the recess includes at least one of: polygonal groove, circular groove, elliptical groove; the shape of the convex part is matched with that of the concave part.

Further, as shown in fig. 2, the prefabricated rotor punching sheet 100 includes a strip-shaped punching sheet 102, and the strip-shaped punching sheets 102 are connected end to form the prefabricated rotor punching sheet 100. As shown in fig. 3, the prefabricated rotor punching sheet 100 may also include at least two strip punching sheets 102, and the at least two strip punching sheets 102 are sequentially connected end to form the prefabricated rotor punching sheet 100. The outer portions of the connection portion 106 and the magnetic conduction portion 104 substantially form the outer diameter of the prefabricated rotor sheet 100, and the inner side of the magnetic conduction portion 104 substantially forms the inner diameter of the prefabricated rotor sheet 100.

Further, as shown in fig. 8 and 9, permanent magnets are placed in the magnet slots, and the polarities of two adjacent permanent magnets 114 are opposite to each other, so that a magnetic convergence effect is formed. Wherein, the permanent magnet 114 may be configured as a built-in spoke type magnet arrangement or a built-in V-shaped magnet arrangement.

Further, as shown in fig. 5, a first limiting portion 116 may be disposed near a terminal of the magnetic conductive portion 104 extending in the width direction of the strip-shaped punching sheet 102, and after the prefabricated rotor punching sheet 100 is spliced, the permanent magnet 114 may be prevented from sliding off from the magnet slot 112 by the first limiting portion 116, so that the temperature of the permanent magnet 114 is ensured to be in the magnet slot 112, and the possibility that the permanent magnet 114 falls off from the magnet slot 112 is reduced. Specifically, the first position-limiting portion 116 may be a groove.

Further, as shown in fig. 6 and 7, a third limiting portion 120 may be disposed near a terminal end of the magnetic conductive portion 104 extending in the width direction of the strip-shaped punching sheet 102, as shown in fig. 9 and 10, and after the rotor is assembled, the third limiting portion 120 may be engaged with the second limiting portion 118 of the protruding portion of the rotating shaft 126. Specifically, as shown in fig. 7 and 10, the second limiting portion 118 is a limiting groove, the second limiting portion 118 includes a radial extending portion 122 protruding from the rotating shaft 126 and a limiting protrusion 124 disposed on the extending portion 122, and the limiting protrusion 124 is connected with the limiting groove, so as to further improve the connection strength between the rotating shaft 126 and the prefabricated rotor sheet 100, so as to ensure the connection firmness between the rotating shaft 126 and the prefabricated rotor sheet 100.

Further, compared with the stamped rotor core 128 adopted in the related art, the method provided by the utility model can reduce the size of the mold in the preparation process of the prefabricated rotor punching sheet 100, and improve the utilization rate of the raw materials for manufacturing the prefabricated rotor punching sheet 100 (for example, improve the utilization rate of silicon steel materials), so that the method is more suitable for large-scale production, and can reduce the costs of the prefabricated rotor punching sheet 100 and the motor using the prefabricated rotor punching sheet 100. In addition, the prefabricated rotor punching sheet 100 is formed in an end-to-end connection mode, the manufacturing difficulty of the prefabricated rotor punching sheet 100 can be reduced, the production efficiency of the prefabricated rotor punching sheet 100 is improved, and the cost of the prefabricated rotor punching sheet 100 is further reduced.

Further, compared with the split rotor core 128 adopted in the related art, the present invention can ensure that an air gap is formed between the rotor assembly and the stator assembly 130 in the motor applying the prefabricated rotor punching sheet 100, and ensure that the prefabricated rotor punching sheet 100 has sufficient rigidity, thereby ensuring the electromagnetic performance of the motor, and avoiding the vibration noise deterioration of the motor. In addition, the utility model can ensure that the shape of the prefabricated rotor punching sheet 100 is more regular and is not easy to deform, thereby ensuring that the excircle of the prefabricated rotor punching sheet 100 is more regular, ensuring that the air gap between the rotor assembly and the stator assembly 130 is uniform, and further avoiding the phenomenon of vibration noise deterioration of the motor.

Further, the present invention also provides an electric machine, including the above rotor assembly and stator assembly 130. Further, stator assembly 130 includes stator teeth 132 and windings 136. Wherein the number Nr of the magnet slots 112 of the rotor assembly, the number Ns of the stator slots 134, and the number Pa of pole pairs of the windings 136 satisfy: pa ═ Nr/2. + -. Ns |. Therefore, new harmonic components in the air gap flux density can be used as the working harmonic of the motor to provide output torque for the motor, so that the torque density of the motor is effectively improved, and the efficiency of the motor is further improved. Specifically, the number of magnet slots 112 is equal to the number of permanent magnets 114.

Further, the stator teeth 132 are provided with stator secondary teeth 138, and the stator secondary teeth 138 can be used as both a magnetic conductive component and a modulation component to realize the function of magnetic field modulation.

Furthermore, the motor provided by the utility model is a double-air gap permanent magnet motor. In addition, the double-air-gap permanent magnet motor has the advantages of being suitable for large-scale production, reducing the size of a die and improving the utilization rate of silicon steel materials. Meanwhile, the additional air gap of the motor is smaller, the magnetic leakage is smaller, the integral rigidity of the motor is better, and the roundness is better, so that the vibration noise of the motor is improved.

In the description of the present invention, the terms "plurality" or "a plurality" refer to two or more, and unless otherwise specifically limited, the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention; the terms "connected," "mounted," "secured," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A prefabricated rotor punching sheet is characterized by comprising:

the bar is towards piece, the bar is towards piece including:

the at least two magnetic conduction parts are arranged at intervals along the length direction of the strip-shaped punching sheet;

the connecting part is connected between two adjacent magnetic conduction parts;

the magnetic conduction parts and the connecting parts are alternately distributed in the length direction of the strip-shaped punching sheet.

2. The prefabricated rotor sheet of claim 1,

the connecting part is a flexible connecting part; or

The connecting part comprises a bending part, and the parts positioned on two sides of the bending part are rotatably connected through the bending part.

3. The preformed rotor sheet as recited in claim 1, further comprising:

the first connecting part is arranged on the magnetic conducting part at one end of the strip-shaped punching sheet in the length direction;

the second connecting portion set up in the length direction's of bar towards piece the other end on the magnetic conduction portion, first connecting portion can with the second connecting portion are connected.

4. The prefabricated rotor sheet of claim 3,

one of the first connecting part and the second connecting part is a convex part, and the other one is a concave part.

5. The prefabricated rotor sheet of claim 4,

the recess includes at least one of: polygonal groove, circular groove, elliptical groove;

the shape of the convex part is matched with that of the concave part.

6. The prefabricated rotor sheet as claimed in any one of claims 1 to 5, further comprising:

and the magnet groove is positioned between two adjacent magnetic conduction parts and is used for accommodating a permanent magnet.

7. A rotor assembly, comprising:

rotor core, the rotor core is ring-shaped, and is formed by prefabricated rotor punching piece according to any one of claims 1 to 6 end to end.

8. The rotor assembly of claim 7,

the rotor iron core comprises one strip-shaped punching sheet; or

The rotor core comprises at least two strip-shaped punching sheets, and the at least two strip-shaped punching sheets are sequentially connected end to end.

9. The rotor assembly of claim 7, further comprising:

and the permanent magnets are arranged in the magnet grooves of the prefabricated rotor punching sheets, and the polarities of every two adjacent permanent magnets are opposite.

10. The rotor assembly of claim 9, wherein the prefabricated rotor lamination further comprises:

the first limiting part is arranged on the magnetic conduction part and used for limiting the permanent magnet.

11. The rotor assembly of claim 9, wherein the rotor assembly:

and the rotating shaft penetrates through the rotor core and is connected with the prefabricated rotor punching sheet.

12. The rotor assembly of claim 11,

the rotating shaft comprises a second limiting part, and the second limiting part protrudes out of the radial direction of the rotating shaft;

the inner wall of the magnet groove is provided with a third limiting part, and at least one part of the second limiting part extends into the magnet groove and is connected with the third limiting part.

13. The rotor assembly of claim 12, wherein the second limit stop is a limit stop groove, the second limit stop comprising:

the extension part is arranged in a protruding mode in the radial direction of the rotating shaft, and the end part of the extension part extends into the magnet groove;

and the limiting protrusion is arranged at the end part of the extending part and is connected with the limiting groove.

14. An electric machine, comprising:

a stator assembly;

a rotor assembly as claimed in any one of claims 7 to 13.

15. The electric machine of claim 14, wherein the stator assembly comprises:

the stator teeth are provided with stator slots between every two adjacent stator teeth;

the winding is wound on the stator teeth and positioned in the stator slots;

wherein the number Nr of magnet slots of the rotor assembly, the number Ns of stator slots, and the number Pa of pole pairs of the winding satisfy: pa ═ Nr/2. + -. Ns |.

16. An electrical device, comprising:

an electrical machine as claimed in claim 14 or 15.