CN218183089U - Disc type motor stator core structure, stator assembly and disc type motor - Google Patents

Abstract

The utility model discloses a disc motor stator core structure, stator module and disc motor, disc motor stator core structure includes stator yoke portion and a plurality of stator tooth portion, be equipped with a plurality of tooth portion mounting grooves on the stator yoke portion, a plurality of tooth portion mounting grooves correspond with a plurality of stator tooth portions, install in the tooth portion mounting groove bottom of stator tooth portion, stator tooth portion extends along the axial direction of stator yoke portion, stator tooth portion includes a plurality of first towards the piece of the range upon range of overall arrangement of radial direction along stator yoke portion, stator yoke portion is by being the multilayer structure that banded second towards the piece coiling formed, multilayer second towards the radial range upon range of overall arrangement of piece, be provided with a plurality of first breachs on the second towards the piece after each layer of edge roll circle and correspond the overall arrangement, the first breach that corresponds on the multilayer second towards the piece forms a tooth portion mounting groove, do benefit to derived design, can reduce cost, raise the efficiency, the electromagnetic property of motor is stable, and the productivity is high, and the material utilization rate is high, do benefit to the serialization design of motor.

Description

Disc type motor stator core structure, stator assembly and disc type motor

The technical field is as follows:

the utility model relates to a disk motor stator core structure, stator module and disk motor.

The background art comprises the following steps:

the disc type motor has the characteristics of high diameter-length ratio, high torque density and high operation efficiency, is similar to a flat disc in shape, is particularly suitable for occasions with strict limitation on installation space, and is widely applied to many fields. The stator of the disk motor is adhered with a plurality of fan-shaped or cylindrical permanent magnets which are alternately arranged according to N and S polarities and fixed on the end cover at one side or two sides of the armature. The permanent magnets are magnetized axially to produce a multi-polar axial magnetic field in the air gap plane. The effective conductors of the armature winding are radially distributed in space.

The disc motor comprises a motor rotor and a motor stator which are arranged on a motor shaft, the stator comprises a stator core, and the stator core is generally manufactured by adopting a silicon steel sheet punching and rolling forming process. As shown in fig. 1, a square groove 02 is punched out of a silicon steel strip 01, the silicon steel strip is wound into a round cake, and a stator core is obtained after the starting position and the ending position are welded and fixed, wherein in the processing process of the stator core, in order to ensure that the groove shapes of the silicon steel strip 01 in the radial direction are consistent after the silicon steel strip 01 is rolled, the width of stator teeth is changed all the time, so that the processing difficulty of the silicon steel strip 01 is large, the utilization rate of the silicon steel strip 01 is low, and more waste materials are generated in punching; in addition, the stator tooth part and the stator yoke part of the stator core made of the silicon steel sheet strip 01 are integrated, so that parameters such as tooth height, tooth width and groove shape cannot be flexibly adjusted, and derivative design and serialization design are not facilitated.

At present, a disc motor with a stator having a modular tooth yoke structure has also been invented, and specific reference may be made to the following patent numbers: 202123125066.8, with patent name: the utility model provides a disk motor's utility model patent based on modularization stator tooth yoke structure, the motor stator of this scheme includes the stator shell, the stator tooth, stator yoke and coil, the stator tooth is by a plurality of silicon steel sheets along the radial modular structure who folds the pressure formation of motor shaft, the stator yoke is by a plurality of silicon steel sheets along the motor shaft axial fold the modular structure who folds the pressure formation, the stator tooth is installed in circular shape stator shell along circumferencial direction staggered arrangement with the stator yoke, the coil is installed on the stator tooth, the rotor adopts the direct structure of pasting to the rotor shell of permanent magnet, modular stator tooth has easily cutting with the stator yoke, high efficiency of processing, moreover, the steam generator is simple in structure, the convenient advantage of wire winding, greatly reduced disk motor's the processing degree of difficulty and cost, nevertheless because this scheme still has following shortcoming:

1) The stator yoke adopts an axial laminating mode, when the serialization design and the derivative design are carried out, if the outer diameter of the stator needs to be changed, corresponding punching sheet dies need to be redesigned aiming at stator yoke punching sheets with different sizes, and the cost of the serialization design and the derivative design is increased.

2) The fitting surface of stator tooth and stator shell is plane and arc surface respectively for there is the clearance when stator tooth and stator shell cooperation, the cooperation is insecure, leads to easily that the cooperation is not inseparable between stator tooth and the stator yoke, thereby makes stator tooth and stator yoke cooperation department have the clearance, leads to the motor electromagnetic property to descend.

The above-mentioned derivative design means that the outer diameter and/or thickness of the stator core is modified accordingly to the requirements.

The invention content is as follows:

the utility model aims at providing a do benefit to and carry out seriation design and derived design, reducible not unidimensional stator yoke towards the research and development of piece mould, reduce derived design's cost, improve derived design efficiency, and can ensure closely complex disk motor stator core structure, stator module and disk motor between stator tooth and the stator yoke.

The purpose of the utility model is realized by the following technical scheme.

A first object of the utility model is to provide a disc motor stator core structure, disc motor stator core structure includes stator yoke portion and a plurality of stator tooth portion, be provided with a plurality of tooth portion mounting grooves on the stator yoke portion, a plurality of tooth portion mounting grooves correspond with a plurality of stator tooth portions, install in the tooth portion mounting groove bottom of stator tooth portion, stator tooth portion extends along stator yoke portion's axial direction, stator tooth portion includes a plurality of first towards the piece of the radial direction range upon range of overall arrangement along stator yoke portion, stator yoke portion is the multilayer structure that forms by being banded second towards the piece coiling, multilayer second is towards the radial range upon range of overall arrangement of piece, be provided with a plurality of first breachs on the second towards the piece after each layer of edge rolling circle and correspond the overall arrangement, the first breach that corresponds on the multilayer second towards the piece forms a tooth portion mounting groove.

Preferably, the bottom of the stator tooth portion is provided with a first connecting structure, a second connecting structure matched with the first connecting structure is arranged on the stator yoke portion and corresponds to each tooth portion mounting groove, and the stator tooth portion is matched with the second connecting structure through the first connecting structure so that the bottom of the stator tooth portion is mounted in the tooth portion mounting groove.

Preferably, first connection structure is including setting up the card foot that the side of stator tooth portion, stretch out toward both sides, second connection structure is including riveting the tongue, rivet the tongue connect in stator yoke portion, and rivet the tongue and be located the notch position of tooth portion mounting groove, rivet the tongue with form one between the tank bottom of tooth portion mounting groove and be used for with card foot complex space, the card foot inlays the dress in the space that corresponds.

Preferably, the upper end surface and the lower end surface of the rivet tongue are respectively provided with a second notch, and the second notches are positioned at the joint of the rivet tongue and the stator yoke portion.

Preferably, the lower end surface of the rivet tongue is an inclined surface.

Preferably, a first rivet groove is formed in the groove bottom of the tooth mounting groove, a rivet is inserted into the first rivet groove, and the rivet is used for jacking the stator tooth so that the clamping pin and the rivet tongue are mutually abutted and matched.

Preferably, the first connecting structure includes setting up the second rivet groove of the side of stator tooth, the second connecting structure includes third rivet groove and rivet, and the third rivet groove distributes on the cell wall of tooth mounting groove, and the third rivet groove with tooth mounting groove intercommunication, the second rivet groove corresponds with the third rivet groove, and corresponding second rivet groove forms a rivet hole with the third rivet groove, and the rivet cartridge is in the rivet hole in order to with stator tooth fixed mounting in on the stator yoke portion.

Preferably, the bottom surface of the stator tooth portion is a plane, and the top surface of the stator tooth portion is a plane or an arc surface.

A second object of the utility model is to provide a stator module, stator module includes the aforesaid a disc motor stator core structure.

A third object of the present invention is to provide a disc motor, which comprises a stator assembly as described above.

Compared with the prior art, the utility model, following effect has:

1) The utility model provides a disc motor stator core structure, through the components of a whole that can function independently design stator yoke portion and stator tooth portion, and stator tooth portion includes a plurality of first punching sheets along the radial direction stack layout of stator yoke portion, stator yoke portion is the multilayer structure that is formed by being banded second punching sheet coiling, make when deriving the design, if need to change stator core's external diameter, then only need to change the coiling number of layers of stator yoke portion and the quantity of the first punching sheet of stator tooth portion can, if need to change stator core's thickness, then only need to change the height of the first punching sheet of stator tooth portion can, this scheme does benefit to and derives the design, and the research and development of reducible stator yoke portion punching sheet mould, reduce the cost of designing, can also improve the efficiency of deriving the design, be provided with the tooth portion mounting groove on the stator yoke portion, the bottom of stator tooth portion is installed in the tooth portion mounting groove and can ensure that closely cooperate between stator tooth portion and the stator yoke portion, thereby guarantee that the electromagnetic performance of motor is stable, improve the productivity; in addition, with stator yoke portion and the design of stator tooth components of a whole that can function independently for the production of reducible waste material when blanking first towards piece and second towards piece improves the utilization ratio of material, according to the design demand of each power section of motor, still can be through adopting not unidimensional stator yoke portion and not unidimensional stator tooth mutually to match out the stator core of multiple motor that is applicable to different demands, thereby be favorable to the serialization design of motor.

2) Other advantages of the present invention will be described in detail in the examples section.

Description of the drawings:

fig. 1 is a schematic structural view of a stator core provided for the prior art;

fig. 2 is a schematic perspective view of a stator core according to an embodiment of the present invention;

fig. 3 is an exploded schematic view of a stator core according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of an assembly relationship between a stator yoke and a stator tooth according to an embodiment of the present invention;

fig. 5 is a schematic perspective view of a stator tooth portion according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a stator yoke winding state according to an embodiment of the present invention;

fig. 7 is a schematic front view of a stator tooth portion according to an embodiment of the present invention;

fig. 8 is a schematic structural diagram of an assembly relationship between a stator yoke and a stator tooth provided in the second embodiment of the present invention;

fig. 9 is a schematic structural diagram of an assembly relationship between a stator yoke and a stator tooth provided in the second embodiment of the present invention (a second notch is provided on a rivet tongue);

fig. 10 is a schematic structural view illustrating an assembly relationship between a stator yoke and a stator tooth according to a second embodiment of the present invention (an inclined surface is an end surface of a rivet tongue);

fig. 11 is a schematic structural diagram of an assembly relationship between a stator yoke and a stator tooth provided in the second embodiment of the present invention (a rivet is inserted into a groove bottom of a tooth mounting groove);

fig. 12 is a schematic structural diagram of an assembly relationship between a stator yoke and a stator tooth provided for the third embodiment of the present invention;

fig. 13 is a schematic front view of a stator tooth portion according to a fourth embodiment of the present invention.

The specific implementation mode is as follows:

the present invention will be described in further detail with reference to specific embodiments and drawings.

The first embodiment is as follows:

as shown in fig. 2 to fig. 6, the present embodiment provides a disc-type motor stator core structure, the disc-type motor stator core structure includes a stator yoke 10 and a plurality of stator teeth 20, the stator yoke 10 is provided with a plurality of tooth mounting slots 101, the plurality of tooth mounting slots 101 correspond to the plurality of stator teeth 20, bottoms of the stator teeth 20 are mounted in the tooth mounting slots 101, the bottoms of the stator teeth 20 are in interference fit with the tooth mounting slots 101, the stator teeth 20 extend along an axial direction of the stator yoke 10, the stator teeth 20 include a plurality of first stamped sheets 1 stacked in a radial direction of the stator yoke 10, the stator yoke 10 is a multi-layer structure formed by winding a second stamped sheet 2 in a strip shape, the multi-layer second stamped sheets 2 are stacked in the radial direction, the second stamped sheet 2 is provided with a plurality of first notches 21, the first notches 21 on the second stamped sheet 2 after each layer of rounding are disposed correspondingly, the corresponding first notches 21 on the multiple layers of second punching sheets 2 form a tooth part mounting groove 101, so that when derivation design is carried out, if the outer diameter of a stator core needs to be changed, only the number of winding layers of the stator yoke part 10 and the number of first punching sheets 1 of the stator tooth part 20 need to be changed, and if the thickness of the stator core needs to be changed, only the height of the first punching sheets 1 of the stator tooth part 20 needs to be changed, the scheme is favorable for derivation design, research and development of a punching sheet die of the stator yoke part 10 can be reduced, the cost of derivation design is reduced, and the efficiency of derivation design can be improved, the tooth part mounting groove 101 is arranged on the stator yoke part 10, and the bottom of the stator tooth part 20 is mounted in the tooth part mounting groove 101, so that the stator tooth part 20 and the stator yoke part 10 can be tightly matched, the electromagnetic performance of a motor is ensured to be stable, and the product force is improved; in addition, with the design of stator yoke portion 10 and stator tooth portion 20 components of a whole that can function independently for the production of reducible waste material when blanking first towards piece 1 and second towards piece 2 improves the utilization ratio of material, according to the design demand of each power section of motor, still can match the stator core that multiple suitable for the motor of different demands through adopting the stator yoke portion 10 of different sizes and the stator tooth portion 20 of different sizes each other moreover, thereby be favorable to the serialization design of motor.

The first punching sheet 1 and the second punching sheet 2 are silicon steel sheets.

As shown in fig. 7, the bottom surfaces 201 of the stator teeth 20 are planar, the top surfaces 202 of the stator teeth 20 are planar, and the bottom surfaces 201 of the stator teeth 20 are parallel to the top surfaces 202 of the stator teeth 20.

Example two:

in the present embodiment, the fitting manner between the stator teeth 20 and the stator yoke 10 is improved on the basis of the first embodiment.

As shown in fig. 8, in order to ensure that the stator teeth 20 and the stator yoke 10 can be tightly fitted, the present scheme is provided with a first connecting structure at the bottom of the stator teeth 20, a second connecting structure adapted to the first connecting structure is provided on the stator yoke 10 corresponding to each tooth mounting groove 101, and the stator teeth 20 are fitted into the tooth mounting grooves 101 through the first connecting structure and the second connecting structure, so that the bottom of the stator teeth 20 is mounted in the tooth mounting grooves 101; specifically, first connection structure is including setting up the card foot 3 that stretches out to the side of stator tooth portion 20, toward both sides, second connection structure includes the tongue 4 of riveting that two intervals set up, rivet tongue 4 connect in stator yoke portion 10, and rivet tongue 4 and be located the notch position of tooth portion mounting groove 101, rivet tongue 4 with form one between the tank bottom of tooth portion mounting groove 101 be used for with card foot 3 complex space, card foot 3 inlays the dress in the space that corresponds, during the installation, can heat stator yoke portion 10 earlier, then carry out the installation of stator tooth portion 20 again, simple structure, simple to operate for can closely cooperate between stator tooth portion 20 and the stator yoke portion 10, thereby guarantee the electromagnetic properties of motor stable.

As shown in fig. 9, it is preferable that the rivet tongue 4 is provided with second notches 5 on the upper and lower end surfaces thereof, the second notches 5 are located at a joint 30 between the rivet tongue 4 and the stator yoke 10, and the second notches 5 are designed to reduce the strength of the joint between the rivet tongue 4 and the stator yoke 10, so that the rivet tongue 4 can be deformed while ensuring that the rivet tongue 4 can press the clip 3, thereby preventing the rivet tongue 4 from being damaged due to deformation after the stator teeth 20 are mounted.

Preferably, as shown in fig. 10, the lower end surface of the rivet tongue 4 is a slope to facilitate the installation of the stator teeth 20.

As a preferable scheme, as shown in fig. 11, a first rivet groove 6 is provided on the bottom of the tooth installation groove 101, a rivet 7 is inserted into the first rivet groove 6, and the rivet 7 is used for jacking up the stator tooth 20 to make the clamping leg 3 and the rivet tongue 4 press-fit with each other, so as to strengthen the connection strength between the stator tooth 20 and the stator yoke 10, thereby ensuring stable electromagnetic performance of the motor.

Example three:

in the embodiment, a first connecting structure and a second connecting structure are improved on the basis of the second embodiment, the first connecting structure is the clamping legs 3 extending out of the side faces and the two sides of the bottom of the stator tooth part 20, the second connecting structure is the riveting tongues 4 connected to the stator yoke part 10 at intervals, and a space matched with the clamping legs 3 is formed between the riveting tongues 4 and the groove bottom of the tooth part mounting groove 101.

In order to solve the above problem, as shown in fig. 12, the first connection structure in this embodiment includes the second rivet groove 8 disposed on the side surface of the stator tooth portion 20, the second connection structure includes the third rivet groove 9 and the rivet 7, the third rivet groove 9 is distributed on the groove wall of the tooth portion mounting groove 101, the third rivet groove 9 is communicated with the tooth portion mounting groove 101, the second rivet groove 8 corresponds to the third rivet groove 9, the corresponding second rivet groove 8 and the third rivet groove 9 form a rivet hole, the rivet 7 is inserted in the rivet hole to fixedly mount the stator tooth portion 20 on the stator yoke portion 10, the structures of the first connection structure and the second connection structure are simplified, the rivet groove is directly opened, waste materials generated during punching can be reduced, and the material utilization rate is improved.

Example four:

the structure of the stator tooth portion 20 is improved on the basis of the first embodiment, the second embodiment or the third embodiment, the bottom surface 201 and the top surface of the stator tooth portion 20 in the first embodiment, the second embodiment or the third embodiment are planes which are arranged in parallel, the top surface 202 of the stator tooth portion 20 adopts the planes, so that an air gap of the disc type motor is uniform, the uniform air gap design has relatively high cogging torque, vibration and noise generated during the operation of the motor are relatively large, and air gap magnetic density harmonics and torque pulsation of the motor are large, so that the smoothness during the operation of the motor is relatively poor.

In order to solve the above problems, as shown in fig. 13, the bottom surface 201 of the stator tooth portion 20 in this embodiment is a flat surface, and the top surface 202 of the stator tooth portion 20 is an arc surface, so that the air gap of the motor becomes an uneven air gap, thereby improving the magnetic field generated by the permanent magnet in the air gap, making the air gap flux density closer to a sine wave distribution, weakening the harmonic content of the air gap flux density, reducing the cogging torque of the motor, reducing the torque ripple of the motor, further optimizing the noise and vibration of the motor, and improving the electromagnetic performance of the motor.

Example five:

the stator assembly comprises a stator core structure of a disc motor according to the first embodiment, the second embodiment, the third embodiment or the fourth embodiment.

Example six:

the present embodiment provides a disc motor including a stator assembly as described in the fifth embodiment.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited thereto, and any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement modes, and are all included in the scope of the present invention.

Claims (10)

1. A disk motor stator core structure which characterized in that: the stator comprises a stator yoke portion (10) and a plurality of stator tooth portions (20), a plurality of tooth portion mounting grooves (101) are formed in the stator yoke portion (10), the plurality of tooth portion mounting grooves (101) correspond to the plurality of stator tooth portions (20), the bottoms of the stator tooth portions (20) are mounted in the tooth portion mounting grooves (101), the stator tooth portions (20) extend along the axial direction of the stator yoke portion (10), the stator tooth portions (20) comprise a plurality of first punching sheets (1) which are stacked along the radial direction of the stator yoke portion (10), the stator yoke portion (10) is a multi-layer structure formed by winding of second punching sheets (2) in a band shape, the second punching sheets (2) are radially stacked, a plurality of first notches (21) are formed in the second punching sheets (2), the first notches (21) in the second punching sheets (2) after each layer of rolling circle correspond to each other in the arrangement, and the corresponding first notches (21) in the second punching sheets (2) form one tooth portion mounting groove (101).

2. The disc motor stator core structure according to claim 1, wherein: the bottom of the stator tooth portion (20) is provided with a first connecting structure, a second connecting structure matched with the first connecting structure is arranged on the stator yoke portion (10) corresponding to each tooth portion mounting groove (101), and the stator tooth portion (20) is matched with the second connecting structure through the first connecting structure so that the bottom of the stator tooth portion (20) is mounted in the tooth portion mounting groove (101).

3. The disc motor stator core structure according to claim 2, wherein: first connection structure is including setting up card foot (3) that stretch out toward both sides, the side of stator tooth portion (20), second connection structure is including riveting tongue (4), rivet tongue (4) connect in stator yoke portion (10), and rivet tongue (4) and be located the notch position of tooth portion mounting groove (101), rivet tongue (4) with form one between the tank bottom of tooth portion mounting groove (101) and be used for with card foot (3) complex space, card foot (3) inlay the dress in the space that corresponds.

4. A disc motor stator core structure according to claim 3, characterized in that: and second notches (5) are respectively arranged on the upper end surface and the lower end surface of the riveting tongue (4), and the second notches (5) are positioned at the joint (30) of the riveting tongue (4) and the stator yoke part (10).

5. The disc motor stator core structure according to claim 4, wherein: the lower end face of the riveting tongue (4) is an inclined plane.

6. A disc motor stator core structure according to claim 3, characterized in that: a first rivet groove (6) is formed in the groove bottom of the tooth portion mounting groove (101), a rivet (7) is inserted into the first rivet groove (6), and the rivet (7) is used for jacking the stator tooth portion (20) to enable the clamping foot (3) and the rivet tongue (4) to be mutually propped and matched.

7. The disc motor stator core structure according to claim 2, wherein: first connection structure is including setting up second rivet groove (8) of the side of stator tooth (20), second connection structure includes third rivet groove (9) and rivet (7), and third rivet groove (9) distribute on the cell wall of tooth mounting groove (101), and third rivet groove (9) with tooth mounting groove (101) intercommunication, second rivet groove (8) correspond with third rivet groove (9), and second rivet groove (8) and third rivet groove (9) that correspond form a rivet hole, rivet (7) cartridge in the rivet hole with stator tooth (20) fixed mounting in on stator yoke (10).

8. A disc motor stator core structure according to any one of claims 1 to 7, wherein: the bottom surface (201) of the stator tooth part (20) is a plane, and the top surface (202) of the stator tooth part (20) is a plane or an arc surface.

9. A stator assembly, characterized by: comprising a disc motor stator core structure according to any one of claims 1 to 8.

10. A disc motor characterized by: a stator assembly comprising the stator assembly of claim 9.

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