CN219980523U - Stator assembly, motor, power assembly and vehicle - Google Patents

Abstract

The utility model discloses a stator assembly, a motor, a power assembly and a vehicle, wherein the stator assembly comprises a stator core, stator windings and slot wedge pieces, the stator core is provided with a rotor hole and a plurality of stator teeth, a stator slot is defined between two adjacent stator teeth, a radial opening of the stator slot, which faces the rotor hole, is a stator slot opening, the stator windings are flat wire continuous windings and are at least partially accommodated in the stator slot, the slot wedge pieces comprise a fixed ring and limiting strips, the fixed ring surrounds the central axis of the stator core, the fixed ring is a plurality of fixed rings and are all arranged at intervals along the axial direction of the stator core, the limiting strips are connected with the fixed ring, the limiting strips are a plurality of limiting strips and are all arranged at intervals along the circumferential direction of the fixed ring, and the limiting strips are accommodated in the stator slot opening so as to limit the windings. According to the stator assembly provided by the embodiment of the utility model, the problem of winding fixation under the conditions that a pole shoe structure is not arranged and a slot wedge fixation structure is not arranged on a stator core is solved; and the structural strength of the slot wedge piece is higher, so that the fixing effect of the winding is ensured.

Description

Stator assembly, motor, power assembly and vehicle

Technical Field

The utility model relates to the technical field of motors, in particular to a stator assembly, a motor, a power assembly and a vehicle.

Background

With the continuous development of the motor industry, the motor is widely applied to the fields of transportation, household appliances, production and manufacturing and the like, wherein the improvement of the motor performance directly affects the development speed of a plurality of fields. Among them, flat wire motors are gaining more attention by virtue of their ability to achieve higher slot fill rates and to boost motor power.

The continuous winding can further improve the power density, and the winding can only be embedded into the stator slots of the stator core in the radial direction through the rotor holes of the stator core, so that the pole shoes of the stator core of the flat wire motor are smaller, thereby avoiding influencing the effective area of the winding and causing the too low slot filling rate. In order to further increase the slot filling rate and improve the power density, the open slot structure scheme without pole shoes can be adopted. However, because there is no pole shoe, the winding can not be fixed in the stator slot, in order to fix the slot wedge in the open slot, the slot wedge fixing structure is usually added at the slot opening, but the setting of the slot wedge fixing structure can affect the motor torque, reduce the motor efficiency, and thus affect the whole car performance.

Therefore, how to fix the slot wedge without providing a slot wedge fixing structure on the stator core without a pole shoe structure, and thus fixing the winding becomes a problem.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a stator assembly, in which a stator core of the stator assembly adopts a structure scheme of an open slot without pole shoes, so as to ensure that a flat wire continuous winding is smoothly assembled on the stator core, and a plurality of fixing rings are arranged at intervals along an axial direction of the stator core, and since a limit strip accommodated in a slot opening of the stator is connected with the fixing rings, the limit strip can be fixed in the slot opening of the stator through the fixing rings, so that a slot wedge part is integrally fixed with the stator core relatively, and a slot wedge fixing structure is not required to be arranged on the stator core, thereby ensuring motor efficiency, ensuring overall performance, and solving the problem of fixing the winding without the pole shoe structure and without the slot wedge fixing structure on the stator core; and because the fixed rings connected with the limit strips are a plurality of, the integral structural strength of the slot wedge can be increased, and the stability and the reliability of the slot wedge for fixing the stator winding are improved.

The utility model further provides a motor with the stator assembly.

The utility model further provides a power assembly with the motor.

The utility model further provides a vehicle with the power assembly.

A stator assembly according to an embodiment of the first aspect of the present utility model includes: the stator iron core is provided with a rotor hole and a plurality of stator teeth positioned on the outer peripheral side of the rotor hole, the stator teeth are distributed at intervals along the circumferential direction of the rotor hole, stator grooves are defined between two adjacent stator teeth, and radial openings of the stator grooves facing the rotor hole are stator slots; a stator winding, which is a flat wire continuous winding and is at least partially accommodated in the stator slot; the slot wedge comprises a plurality of fixed rings and limiting strips, the fixed rings encircle the central axis of the stator core, the fixed rings are multiple, the fixed rings are arranged at intervals along the axial direction of the stator core, the limiting strips are arranged along the axial direction of the stator core and are connected with the fixed rings, the limiting strips are multiple, the limiting strips are arranged along the circumferential intervals of the fixed rings, and at least part of the limiting strips are contained in the notch of the stator to limit the stator winding.

According to the stator assembly provided by the embodiment of the utility model, the stator core of the stator assembly adopts the structural scheme of the open slot without the pole shoe, so that the flat wire continuous winding is smoothly assembled on the stator core, and the limiting strips accommodated in the stator notch are connected with the fixing rings through the plurality of fixing rings which are arranged at intervals along the axial direction of the stator core, so that the limiting strips are fixed in the stator notch through the fixing rings, the whole slot wedge is fixed with the stator core relatively, and a slot wedge fixing structure is not required to be arranged on the stator core, thereby ensuring the motor efficiency, ensuring the whole vehicle performance and solving the problem of winding fixing under the conditions that no pole shoe structure exists and no slot wedge fixing structure is arranged on the stator core; and because the fixed rings connected with the limit strips are a plurality of, the integral structural strength of the slot wedge can be increased, and the stability and the reliability of the slot wedge for fixing the stator winding are improved.

According to some embodiments of the utility model, at least one of the retaining rings is formed separately from the stop bar; alternatively, the slot wedge is an integral molding.

According to some embodiments of the utility model, at least part of the limit strips are connected with at least one of the fixing rings in a clamping manner.

According to some embodiments of the utility model, the outer peripheral wall of the fixing ring is formed with a matching notch, and a part of the limit bar is accommodated in the matching notch.

According to some embodiments of the utility model, the limit bar is formed with a hook, and the hook hooks the fixing ring.

According to some embodiments of the utility model, at least one of the fixing rings includes a plurality of positioning portions disposed at intervals along a circumferential direction of the stator core, the positioning portions are arc-shaped, the plurality of positioning portions are sequentially arranged in the circumferential direction of the stator core to form the fixing ring, and the plurality of positioning portions are respectively and independently molded.

According to some embodiments of the utility model, the positioning portion is integrally formed with the limit bar or the positioning portion is connected with the limit bar in a clamping manner.

According to some embodiments of the utility model, the number of the fixing rings is two, and the two fixing rings are a first fixing ring and a second fixing ring, and the first fixing ring and the second fixing ring are respectively located at two axial sides of the stator core.

According to some embodiments of the utility model, the first fixing ring and the second fixing ring are both clamped with two axial ends of the limit strip.

According to some embodiments of the utility model, the first fixing ring is integrally formed with the limit bar, and the second fixing ring is clamped with the limit bar.

According to some embodiments of the present utility model, the first fixing ring is an integrally formed piece and is clamped with the limiting strip, the second fixing ring includes two positioning portions that are disposed at intervals along the circumferential direction of the stator core, the positioning portions are arc-shaped, the two positioning portions are sequentially arranged in the circumferential direction of the stator core to form the second fixing ring, the two positioning portions are respectively and independently formed, and the limiting strip and the corresponding positioning portion are integrally formed.

According to some embodiments of the utility model, the first fixing ring is integrally formed with a portion of the stop bar, and the second fixing ring is integrally formed with another portion of the stop bar.

According to some embodiments of the utility model, the first fixing ring and a part of the limit strips are integrally formed to form a first sub-slot wedge, and the second fixing ring and another part of the limit strips are integrally formed to form a second sub-slot wedge, and the first sub-slot wedge and the second sub-slot wedge have the same structure.

According to some embodiments of the utility model, the rotor cooperating with the stator comprises a rotor core and rotor end plates, the rotor core being arranged in the rotor bore, the rotor end plates being located on both axial sides of the rotor core, the first fixing ring being adapted to surround the outer circumferential side of one of the rotor end plates, the second fixing ring being adapted to surround the outer circumferential side of the other rotor end plate.

An electric machine according to an embodiment of the second aspect of the utility model comprises a stator assembly according to an embodiment of the first aspect of the utility model described above.

According to the motor provided by the embodiment of the utility model, the stator core of the stator assembly adopts the structural scheme of the open slot without the pole shoe, so that the flat wire continuous winding is ensured to be smoothly assembled on the stator core, and the limiting strips accommodated in the stator notch are connected with the fixing rings through the plurality of fixing rings which are arranged at intervals along the axial direction of the stator core, so that the limiting strips can be fixed in the stator notch through the fixing rings, the whole slot wedge part is relatively fixed with the stator core, and a slot wedge fixing structure is not required to be arranged on the stator core, thereby ensuring the motor efficiency, ensuring the whole motor performance and solving the problem of winding fixing under the conditions of no pole shoe structure and no slot wedge fixing structure arranged on the stator core; and because the fixed rings connected with the limit strips are a plurality of, the integral structural strength of the slot wedge can be increased, and the stability and the reliability of the slot wedge for fixing the stator winding are improved.

According to a third aspect of the present utility model, a powertrain is provided, which includes a motor according to the second aspect of the present utility model, a speed reducer, and a control unit, wherein an input shaft of the speed reducer is connected to a rotating shaft of the motor; the control unit is used for controlling the motor.

According to the power assembly provided by the embodiment of the utility model, the stator core of the stator assembly adopts the structural scheme of the open slot without the pole shoe, so that the flat wire continuous winding is smoothly assembled on the stator core, and the limit strips accommodated in the stator slot are connected with the fixed rings through the fixed rings because the limit strips accommodated in the stator slot are connected with the fixed rings, so that the whole slot wedge component is fixed relative to the stator core, and a slot wedge fixing structure is not required to be arranged on the stator core, thereby ensuring the efficiency of the motor, ensuring the performance of the whole motor, and solving the problem of fixing the winding under the conditions of no pole shoe structure and no slot wedge fixing structure on the stator core; and because the fixed rings connected with the limit strips are a plurality of, the integral structural strength of the slot wedge can be increased, and the stability and the reliability of the slot wedge for fixing the stator winding are improved.

A vehicle according to an embodiment of a fourth aspect of the utility model comprises a powertrain according to an embodiment of the above-described third aspect of the utility model.

According to the vehicle provided by the embodiment of the utility model, through the adoption of the power assembly provided with the embodiment, the stator core of the stator assembly adopts the structural scheme of the open slot without the pole shoe, so that the flat wire continuous winding is ensured to be smoothly assembled on the stator core, and through the plurality of fixing rings which are arranged at intervals along the axial direction of the stator core, as the limiting strips accommodated in the stator slot are connected with the fixing rings, the limiting strips can be fixed in the stator slot through the fixing rings, so that the whole slot wedge part is relatively fixed with the stator core, and a slot wedge fixing structure is not required to be arranged on the stator core, thereby ensuring the motor efficiency, ensuring the whole vehicle performance, and solving the problem of winding fixing under the conditions of no pole shoe structure and no slot wedge fixing structure arranged on the stator core; and because the fixed rings connected with the limit strips are a plurality of, the integral structural strength of the slot wedge can be increased, and the stability and the reliability of the slot wedge for fixing the stator winding are improved.

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 foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is an exploded view of a stator assembly according to some embodiments of the utility model;

fig. 2 is an enlarged view at a in fig. 1;

FIG. 3 is a schematic view of the retaining ring of FIG. 1;

fig. 4 is a cross-sectional view of the stator core of fig. 1;

FIG. 5 is a cross-sectional view of the stator assembly of FIG. 1;

fig. 6 is an enlarged view at B in fig. 5;

FIG. 7 is a cross-sectional view of another view of the stator assembly of FIG. 1;

fig. 8 is an enlarged view at C in fig. 7;

FIG. 9 is an exploded view of a stator assembly according to further embodiments of the present utility model;

FIG. 10 is an exploded view of a stator assembly according to still further embodiments of the present utility model;

FIG. 11 is an exploded view of a stator assembly according to still other embodiments of the present utility model;

fig. 12 is an enlarged view at D in fig. 11;

FIG. 13 is an exploded view of a stator assembly of still other embodiments of the present utility model;

FIG. 14 is a schematic view of a stop bar according to some embodiments of the utility model;

fig. 15 is a schematic view of a vehicle according to some embodiments of the utility model.

Reference numerals:

100. A stator assembly;

10. a stator core; 11. a rotor bore; 12. stator teeth; 13. a stator groove; 14. a stator slot;

20. a slot wedge; 2. a fixing ring; 21. a first fixing ring; 22. a second fixing ring; 23. a matching notch; 24. a positioning part; 3. a limit bar; 31. a hook; 5. a first sub-slot wedge; 6. a second sub-slot wedge;

30. a stator winding; 4. insulating paper;

2000. a motor; 3000. a vehicle.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

A stator assembly 100 according to an embodiment of the present utility model is described below with reference to fig. 1-12.

As shown in fig. 1-12, a stator assembly 100 according to an embodiment of the first aspect of the present utility model includes: stator core 10, stator windings 30 and slot wedges 20.

The stator core 10 has a rotor hole 11, a plurality of stator teeth 12 located at an outer circumferential side of the rotor hole 11, a rotor may be disposed in the rotor hole 11, and the rotor and stator assembly 100 may be assembled into the motor 2000. The plurality of stator teeth 12 are arranged at intervals along the circumferential direction of the rotor hole 11, stator slots 13 are defined between two adjacent stator teeth 12, and radial openings of the stator slots 13 facing the rotor hole 11 are stator slots 14. The stator winding 30 is a flat wire continuous winding, for example, the stator winding 30 may be a flat wire continuous wave winding. And the stator windings 30 are at least partially accommodated in the stator slots 13. For example, the stator winding 30 may be partially accommodated in the stator slot 13, or the stator winding 30 may be entirely accommodated in the stator slot 13. The stator core 10 of the stator assembly 100 adopts the structure scheme of an open slot without a pole shoe, so that smooth assembly of the flat wire continuous winding to the stator core 10 can be ensured. The stator winding 30 may be inserted into the stator slots 13 of the stator core 10 in the radial direction of the rotor hole 11 when installed.

The slot wedge 20 includes a plurality of fixed rings 2 and a plurality of spacing bars 3, the fixed rings 2 encircle the central axis of the stator core 10, the fixed rings 2 are a plurality of, the fixed rings 2 are arranged along the axial interval of the stator core 10, the spacing bars 3 extend along the axial direction of the stator core 10 and the spacing bars 3 are connected with the fixed rings 2, for example, the spacing bars 3 extend along the axial direction of the stator core 10 and the spacing bars 3 can be connected with each fixed ring 2. The limiting strips 3 are multiple, the limiting strips 3 are arranged at intervals along the circumferential direction of the fixed ring 2, and at least part of the limiting strips 3 are accommodated in the stator notch 14 to limit the stator winding 30. For example, part of the limit bar 3 is accommodated in the stator slot 14, or all of the limit bar 3 is accommodated in the stator slot 14. The stator core 10 of the stator assembly 100 adopts the structure scheme of an open slot without a pole shoe, if no fixed structure exists, the stator winding 30 can be separated from the stator slot 13, thereby affecting the normal use of the stator assembly 100.

At least part of the limit strip 3 is accommodated in the stator notch 14, and can play a role in fixing and limiting the stator winding 30 in the positioning groove, so that the stator winding 30 is fixed in the stator groove 13, the stator winding 30 can be well prevented from extending into the rotor hole 11 from the stator notch 14, the stator winding 30 is prevented from occupying the air gap space between the stator assembly 100 and the rotor, the assembly of the whole machine can be facilitated, and the performance and normal use of the whole machine are ensured. If the stator winding 30 occupies the air gap between the stator assembly 100 and the rotor, the assembly of the motor 2000 is not facilitated, and even if the motor 2000 can be assembled, there is a certain safety hazard when the motor 2000 is used. Even if the stator winding 30 occupies more air gap between the stator assembly 100 and the rotor, the rotor interferes with the stator winding 30 during rotation, resulting in damage to the motor 2000 and failure of normal use. The number and the positions of the limit strips 3 and the stator slots 13 are in one-to-one correspondence, so that the limit of all stator windings 30 positioned in the stator slots 13 can be conveniently and integrally limited.

The spacing 3 links to each other with solid fixed ring 2, and gu fixed ring 2 can play support and fixed action to spacing 3, prevents that spacing 3 from following stator notch 14 along rotor hole 11 radially and drop, can guarantee that slot wedge 20 is whole to stator winding 30's fixed, need not to set up slot wedge fixed knot on stator core 10 to can guarantee motor 2000 efficiency, guarantee whole car performance, solved and not having the pole shoe structure and not set up slot wedge fixed knot on stator core 10's the fixed winding's of condition problem.

And, the fixed ring 2 is a plurality of along the axial interval setting of stator core 10, and spacing 3 links to each other with every fixed ring 2, can increase the holistic structural strength of slot wedge 20, improves the stability and the reliability that slot wedge 20 is fixed to stator winding 30.

For example, in some embodiments of the present utility model, the stator assembly 100 further includes an insulating paper 4, where the insulating paper 4 is wrapped around the outer side of the stator winding 30 in the stator slot 13, and the insulating paper 4 may be used to insulate the stator winding 30 from the stator teeth 12, so as to increase the insulation performance of the stator winding 30.

According to the stator assembly 100 of the embodiment of the utility model, the stator core 10 of the stator assembly 100 adopts the structural scheme of the open slot without the pole shoe, so that the flat wire continuous winding is ensured to be smoothly assembled on the stator core 10, and the limit strips 3 accommodated in the stator slot opening 14 are connected with the fixed rings 2 through the plurality of fixed rings 2 which are arranged at intervals along the axial direction of the stator core 10, so that the limit strips 3 can be fixed in the stator slot opening 14 through the fixed rings 2, the whole slot wedge 20 is fixed relative to the stator core 10, and a slot wedge fixing structure is not required to be arranged on the stator core 10, thereby ensuring the efficiency of the motor 2000, ensuring the overall performance, and solving the problem of winding fixing under the conditions of no pole shoe structure and no slot wedge fixing structure arranged on the stator core 10; in addition, as the number of the fixing rings 2 connected with the limit strips 3 is multiple, the overall structural strength of the slot wedge 20 can be increased, and the stability and reliability of the slot wedge 20 for fixing the stator winding 30 can be improved.

According to some embodiments of the utility model, referring to fig. 1-2 and 9-10, at least one securing ring 2 is formed separately from the stop bar 3. For example, one of the fixing rings 2 is formed independently of the limit bar 3, or a plurality of fixing rings 2 are formed independently of the limit bar 3. The at least one fixed ring 2 is independently formed relative to the limit strip 3, the limit strip 3 can be firstly arranged in the stator groove 13, then the limit strip 3 is connected with the fixed ring 2, and the fixing of the limit strip 3 is realized, so that the installation and the disassembly between the limit strip 3 and the stator groove 13 can be conveniently realized, the overall assembly difficulty of the stator assembly 100 is reduced, and the assembly efficiency is ensured. Meanwhile, the integral processing technology of the slot wedge 20 can be simplified, and the processing difficulty of the slot wedge 20 can be reduced.

According to some embodiments of the present utility model, referring to fig. 13, the slot wedge 20 is an integral part, which can improve the structural strength and rigidity of the whole slot wedge 20, make the connection between the fixing ring 2 and the limit bar 3 more reliable, and can facilitate the installation and disassembly of the slot wedge 20, and improve the assembly efficiency of the whole stator assembly 100. For example, the number of the fixing rings 2 of the slot wedge 20 may be two, and the number of the two fixing rings 2 may be a first fixing ring 21 and a second fixing ring 22, respectively, and the first fixing ring 21 and the second fixing ring 22 may be located on both sides of the stator core 10 in the axial direction, respectively. The first fixing ring 21 is connected to a side of each of the stopper bars 3 in the radial direction of the rotor hole 11 near the center axis of the rotor hole 11, and the second fixing ring 22 is connected to an end of each of the stopper bars 3 in the axial direction of the rotor hole 11. When the slot wedge 20 is installed, the slot wedge 20 can be inserted into the rotor hole 11 along the side where the second fixing ring 22 is located, and the limit strips 3 are located in the corresponding stator slots 14 until the second fixing ring 22 contacts with the axial end face of the stator core 10, thereby completing the installation of the slot wedge 20.

According to some embodiments of the present utility model, referring to fig. 1-2 and 9-12, at least a portion of the limit strips 3 is connected to at least one fixed ring 2 in a clamping manner, for example, a portion of the limit strips 3 is connected to one fixed ring 2 in a clamping manner, or all of the limit strips 3 are connected to one fixed ring 2 in a clamping manner, or a portion of the limit strips 3 are connected to a plurality of fixed rings 2 in a clamping manner, or all of the limit strips 3 are connected to a plurality of fixed rings 2 in a clamping manner. The fixed ring 2 is connected with the limiting strip 3 in a clamping manner, so that the structure is simple, the operation is convenient, the installation and the disassembly between the limiting strip 3 and the fixed ring 2 can be facilitated, and the replacement and the maintenance of the limiting strip 3 can be facilitated.

According to some embodiments of the present utility model, referring to fig. 1-2 and 9-12, the outer peripheral wall of the fixing ring 2 is formed with a fitting notch 23, and a portion of the stopper 3 is accommodated in the fitting notch 23. When the part of the spacing 3 is accommodated in the matching notch 23, the matching notch 23 can support and fix the spacing 3, so that the spacing 3 is fixed in the stator slot 13, the spacing 3 is prevented from falling out from the stator slot 14 along the radial direction of the rotor hole 11, and the fixing effect of the spacing 3 on the stator winding 30 is ensured. For example, the opening direction of the mating notch 23 may face into the stator slot 13 along the radial direction of the rotor hole 11, the mating notch 23 and the limit strips 3 are in one-to-one correspondence in number and position, and the plurality of mating notches 23 may be uniformly arranged at intervals along the circumferential direction of the outer peripheral wall of the fixing ring 2.

According to some embodiments of the present utility model, referring to fig. 14, the limiting bar 3 is formed with a hook 31, and the hook 31 hooks the fixing ring 2. The buckle of the limiting strip 3 hooks the fixed ring 2, so that the fixed ring 2 can support and fix the limiting strip 3. The spacing 3 is connected with the solid fixed ring 2 through the trip 31, and simple structure, convenient operation is convenient for the installation and the dismantlement of spacing 3 to and the change and the maintenance of spacing 3 of being convenient for.

According to some embodiments of the present utility model, referring to fig. 11 to 12, at least one of the fixing rings 2 includes a plurality of positioning portions 24 spaced apart along the circumferential direction of the stator core 10, for example, one of the fixing rings 2 includes a plurality of positioning portions 24 spaced apart along the circumferential direction of the stator core 10, or each of the fixing rings 2 includes a plurality of positioning portions 24 spaced apart along the circumferential direction of the stator core 10. The positioning portions 24 are arc-shaped, the plurality of positioning portions 24 are sequentially arranged in the circumferential direction of the stator core 10 to form the fixing ring 2, and the plurality of positioning portions 24 are respectively and independently molded. After the spacing 3 is installed in the stator slot 13, every location portion 24 all can link to each other with a plurality of spacing 3, and when a plurality of location portions 24 arrange in proper order and form solid fixed ring 2, location portion 24 can play support and fixed action to the spacing 3 that links to each other, makes spacing 3 can fix stator winding 30 in stator slot 13, guarantees stator module 100 normal use. The positioning parts 24 are respectively and independently formed, so that the installation and the disassembly of the slot wedge 20 can be facilitated, the overall assembly difficulty of the slot wedge 20 is reduced, and the assembly efficiency is ensured. Meanwhile, the integral processing technology of the fixed ring 2 can be simplified, and the processing difficulty of the fixed ring 2 is reduced.

According to some embodiments of the present utility model, referring to fig. 11-12, the positioning portion 24 is integrally formed with the stop bar 3 or the positioning portion 24 is connected to the stop bar 3 in a clamping manner. The positioning part 24 and the limit strip 3 are integrally formed, so that the integral structural strength and rigidity of the slot wedge 20 can be improved, the connection between the positioning part 24 and the limit strip 3 is more reliable, the number of integral parts is less, and the assembly efficiency is improved. The locating part 24 is connected with the limiting strip 3 in a clamping manner, so that the structure is simple, the operation is convenient, the installation and the disassembly between the limiting strip 3 and the locating part 24 can be convenient, and the replacement and the maintenance of the limiting strip 3 can be convenient.

According to some embodiments of the present utility model, referring to fig. 1 and 9-11, the number of the fixing rings 2 is two, so that the overall structural strength of the slot wedge 20 can be enhanced, and the stability and reliability of fixing the slot wedge 20 to the stator winding 30 can be improved. The two fixing rings 2 are a first fixing ring 21 and a second fixing ring 22, respectively, and the first fixing ring 21 and the second fixing ring 22 are located on both sides of the stator core 10 in the axial direction, respectively. The setting like this, when spacing 3 all links to each other with first solid fixed ring 21 and second solid fixed ring 22, can make spacing 3 be located between first solid fixed ring 21 and the solid fixed ring 22 of second in the axial direction of rotor hole 11, first solid fixed ring 21 and the solid fixed ring 22 of second all can play support and fixed action to spacing 3, realize spacing 3 in the radial direction of rotor hole 11, avoid spacing 3 to deviate from along radial follow stator notch 14, guarantee the fixed effect of spacing 3 to stator winding 30.

In addition, the first fixing ring 21 and the second fixing ring 22 are respectively located at two axial sides of the stator core 10, so that the fixing ring 2 can be prevented from occupying an air gap between the stator assembly 100 and the rotor, thereby ensuring the stability of the overall operation of the motor 2000 and the overall performance of the motor 2000.

For example, the first fixing ring 21 and the second fixing ring 22 may respectively abut against end surfaces of the stator core 10 in the axial direction, and when the limit bar 3 is connected to both the first fixing ring 21 and the second fixing ring 22, the first fixing ring 21 and the second fixing ring 22 cooperate to jointly limit the movement of the limit bar 3 in the axial direction.

According to some embodiments of the present utility model, referring to fig. 1, the first fixing ring 21 and the second fixing ring 22 are clamped with two axial ends of the limit bar 3, so that the structure is simple, the operation is convenient, the installation and the disassembly between the limit bar 3 and the fixing ring 2 can be convenient, and the replacement and the maintenance of the limit bar 3 are convenient.

In mounting the slot wedge 20, the stop bar 3 may be first mounted to the stator slot 14 in the radial direction of the rotor hole 11 such that the stop bar 3 is located at a side of the stator winding 30 adjacent to the stator slot 14. And then the limiting strip 3 is clamped with the first fixing ring 21 and the second fixing ring 22, and the fixing ring 2 can limit and fix the limiting strip 3, so that the limiting strip 3 is prevented from being separated from the stator groove 13, and the slot wedge 20 is arranged on the stator core 10.

Or, when the slot wedge 20 is installed, the limit strip 3 and the first fixing ring 21 (or the second fixing ring 22) can be clamped first, so that the initial fixing of the limit strip 3 can be realized. The limit strips 3 are inserted into the corresponding stator slots 13 along the axial direction of the rotor holes 11, so that the limit strips 3 are positioned on one side of the stator winding 30, which is close to the stator slots 14. And then the limit strip 3 is clamped with the second fixing ring 22 (or the first fixing ring 21), so that the limit strip 3 is limited and fixed by the fixing ring 2, the limit strip 3 is prevented from being separated from the stator groove 13, and the slot wedge 20 is arranged on the stator core 10.

For example, the first fixing ring 21 and the second fixing ring 22 may be integrally formed. The outer peripheral walls of the first fixing ring 21 and the second fixing ring 22 are respectively provided with a matching notch 23, and a part of the limit strip 3 is accommodated in the matching notch 23, so that the limit strip 3 is clamped with the first fixing ring 21 and the second fixing ring 22. Or, the stop strip 3 may be formed with a hook 31, and the stop strip 3 may hook the fixing ring 2 through the hook 31, so as to implement the clamping connection between the stop strip 3 and the first fixing ring 21 and the second fixing ring 22.

According to some embodiments of the present utility model, referring to fig. 9, the first fixing ring 21 is integrally formed with the stop bar 3, so that the structural strength and rigidity of the entire slot wedge 20 can be improved, and the connection between the first fixing ring 21 and the stop bar 3 is more reliable. The second fixed ring 22 is clamped with the limiting strip 3, so that the structure is simple, the operation is convenient, the installation and the disassembly between the limiting strip 3 and the second fixed ring 22 can be facilitated, and the replacement and the maintenance of the limiting strip 3 can be facilitated.

When the slot wedge 20 is installed, the limit bar 3 may be inserted into the corresponding stator slot 13 along the axial direction of the rotor hole 11 from the side of the stator core 10 where the first fixing ring 21 is located, so that the limit bar 3 is located at the side of the stator winding 30 near the stator slot 14. And then the limiting strip 3 is clamped with the second fixing ring 22, so that the limiting strip 3 is limited and fixed by the fixing ring 2, the limiting strip 3 is prevented from being separated from the stator groove 13, and the slot wedge 20 is arranged on the stator core 10.

For example, the second securing ring 22 may be an integral piece. The outer peripheral wall of the second fixing ring 22 is provided with a matching notch 23, and a part of the limit strip 3 is accommodated in the matching notch 23, so that the limit strip 3 and the second fixing ring 22 are clamped. Or one end of the limiting strip 3, which is close to the second fixed ring 22, can be provided with a clamping hook 31, and the limiting strip 3 can hook the second fixed ring 22 through the clamping hook 31, so that the clamping connection between the limiting strip 3 and the second fixed ring 22 is realized.

According to some embodiments of the present utility model, referring to fig. 10, the first fixing ring 21 is an integrally formed piece, and the first fixing ring 21 is clamped with the limit bar 3, so that the structure is simple, the operation is convenient, the installation and the disassembly between the limit bar 3 and the first fixing ring 21 can be convenient, and the replacement and the maintenance of the limit bar 3 are convenient.

The second fixing ring 22 comprises two positioning portions 24 which are arranged along the circumferential direction of the stator core 10 at intervals, the positioning portions 24 are arc-shaped, the two positioning portions 24 are sequentially arranged in the circumferential direction of the stator core 10 to form the second fixing ring 22, the two positioning portions 24 are respectively and independently formed, the limiting strips 3 and the corresponding positioning portions 24 are integrally formed, the integral structural strength and rigidity of the slot wedge 20 can be improved, and the connection between the positioning portions 24 and the corresponding limiting strips 3 is more reliable. When the two positioning portions 24 are sequentially arranged to form the fixing ring 2, the positioning portions 24 can support and fix the connected limit strips 3, so that the limit strips 3 can fix the stator winding 30 in the stator slots 13, and normal use of the stator assembly 100 is ensured. The two positioning parts 24 are respectively and independently formed, so that the installation and the disassembly of the slot wedge 20 can be facilitated, the overall assembly difficulty of the slot wedge 20 is reduced, and the assembly efficiency is ensured. Meanwhile, the integral processing technology of the fixed ring 2 can be simplified, and the processing difficulty of the fixed ring 2 is reduced.

When the slot wedge 20 is installed, the limit bar 3 connected with one positioning part 24 can be firstly inserted into the corresponding stator slot 13 along the axial direction of the rotor hole 11 from one side of the stator core 10 where the second fixing ring 22 is located, and meanwhile, the limit bar 3 connected with the other positioning part 24 can be inserted into the corresponding stator slot 13 along the axial direction of the rotor hole 11 from one side of the stator core 10 where the second fixing ring 22 is located, so that the limit bar 3 is located at one side of the stator winding 30 close to the stator slot 14. And then the limiting strip 3 is clamped with the first fixing ring 21, so that the limiting strip 3 is limited and fixed by the fixing ring 2, the limiting strip 3 is prevented from being separated from the stator groove 13, and the slot wedge 20 is arranged on the stator core 10.

According to some embodiments of the utility model, referring to fig. 11-12, the first fixing ring 21 is integrally formed with a portion of the stop bar 3, and the second fixing ring 22 is integrally formed with another portion of the stop bar 3. The first fixing ring 21 and the partial limiting strip 3 are integrally formed, so that the integral structural strength and rigidity of the slot wedge 20 can be improved, and the connection between the first fixing ring 21 and the partial limiting strip 3 is more reliable. The first fixing ring 21 is clamped with the other part of the limiting strip 3, so that the other part of the limiting strip 3 can be conveniently installed and detached from the first fixing ring 21.

The second fixing ring 22 and the other part of the limiting strip 3 are integrally formed, so that the integral structural strength and rigidity of the slot wedge 20 can be improved, and the connection between the second fixing ring 22 and the other part of the limiting strip 3 is more reliable. The second fixing ring 22 is clamped with the partial limiting strip 3, so that the partial limiting strip 3 and the first fixing ring 21 can be conveniently installed and detached.

When the slot wedge 20 is installed, a part of the limit strips 3 can be inserted into the corresponding stator slots 13 along the axial direction of the rotor hole 11 from one side of the stator core 10 where the first fixing ring 21 is located, so that the part of the limit strips 3 is located at one side of the stator winding 30 close to the stator slot 14, and then one end of the part of the limit strips 3 close to the second fixing ring 22 is clamped with the second fixing ring 22. Meanwhile, the other part of the limiting strips 3 can be inserted into the corresponding stator slots 13 along the axial direction of the rotor hole 11 from one side of the stator core 10 where the second fixing ring 22 is located, so that the other part of the limiting strips 3 is located at one side of the stator winding 30, which is close to the stator slot 14, and then one end of the other part of the limiting strips 3, which is close to the first fixing ring 21, is clamped with the first fixing ring 21. Thereby realizing the limit and the fixation of the limit bar 3 by the fixed ring 2, avoiding the limit bar 3 from falling out of the stator slot 13, thereby installing the slot wedge 20 on the stator core 10.

For example, the first fixing ring 21 and the second fixing ring 22 may be integrally formed. Other parts of the peripheral wall of the first fixing ring 21, which are integrally formed relative to the first fixing ring 21 and part of the limiting strips 3, can be formed with matching notches 23, and parts of the other part of the limiting strips 3 are accommodated in the matching notches 23, so that the clamping connection between the other part of the limiting strips 3 and the first fixing ring 21 is realized. Other parts of the peripheral wall of the second fixing ring 22, which are integrally formed relative to the second fixing ring 22 and the other part of the limiting strip 3, can be formed with a matching notch 23, and part of the limiting strip 3 is accommodated in the matching notch 23, so that the clamping connection between the part of the limiting strip 3 and the first fixing ring 21 is realized.

For example, a hook 31 may be formed at one end of the partial limit bar 3 near the second fixing ring 22, and the partial limit bar 3 may hook the second fixing ring 22 through the hook 31, so as to implement the clamping connection between the partial limit bar 3 and the first fixing ring 21. The other part of the limiting strips 3 can be formed with a clamping hook 31 at one end close to the first fixing ring 21, and the other part of the limiting strips 3 can hook the first fixing ring 21 through the clamping hook 31, so that the other part of the limiting strips 3 are clamped with the first fixing ring 21.

According to some embodiments of the present utility model, referring to fig. 11-12, the first fixing ring 21 is integrally formed with a portion of the limit bars 3 to form the first sub-slot wedge 5, and the second fixing ring 22 is integrally formed with another portion of the limit bars 3 to form the second sub-slot wedge 6, and the first sub-slot wedge 5 and the second sub-slot wedge 6 have the same structure, and the number of limit bars 3 of the first sub-slot wedge 5 and the second sub-slot wedge 6 is the same and each accounts for half of the total number of limit bars 3. The arrangement can reduce the overall production steps of the slot wedge 20, facilitate the overall processing and manufacturing of the slot wedge 20, and reduce the overall production and design cost.

According to some embodiments of the present utility model, the rotor cooperating with the stator assembly 100 includes a rotor core and rotor end plates, the rotor core is disposed in the rotor hole 11, the rotor end plates are disposed at two axial sides of the rotor core, and the rotor end plates can be used for adjusting the dynamic balance of the rotor integrally, so that the rotation of the rotor is more stable, thereby reducing the vibration of the rotor and prolonging the service life of the whole. For example, the complete machine can realize the adjustment of the dynamic balance of the rotor by increasing or decreasing the mass of a certain position of the rotor end plate.

The first fixing ring 21 is adapted to surround the outer peripheral side of one of the rotor end plates, and the second fixing ring 22 is adapted to surround the outer peripheral side of the other rotor end plate. The arrangement can make the whole structure more compact, and improve the whole space utilization rate.

The motor 2000 according to the embodiment of the second aspect of the present utility model includes the stator assembly 100 according to the embodiment of the first aspect of the present utility model described above. The motor 2000 may also include a rotor, which may be disposed within the rotor bore 11 of the stator assembly 100. When the rotor is disposed in the rotor hole 11, the stator winding 30 is powered on, so that a rotating magnetic field is formed in the rotor hole 11, and the rotor in the rotor hole 11 can be rotated, so that the motor 2000 is in an operating state.

According to the motor 2000 of the embodiment of the present utility model, by arranging the stator assembly 100, the stator core 10 of the stator assembly 100 adopts the structure scheme of the open slot without the pole shoe, so as to ensure that the flat wire continuous winding is smoothly assembled on the stator core 10, and by arranging the plurality of fixing rings 2 at intervals along the axial direction of the stator core 10, as the limit strips 3 accommodated in the stator slot opening 14 are connected with the fixing rings 2, the limit strips 3 can be fixed in the stator slot opening 14 through the fixing rings 2, so that the whole slot wedge member 20 is fixed relative to the stator core 10, and no slot wedge fixing structure is required to be arranged on the stator core 10, thereby ensuring the efficiency of the motor 2000, ensuring the whole car performance, and solving the problem of fixing the winding under the conditions of no pole shoe structure and no slot wedge fixing structure being arranged on the stator core 10; in addition, as the number of the fixing rings 2 connected with the limit strips 3 is multiple, the overall structural strength of the slot wedge 20 can be increased, and the stability and reliability of the slot wedge 20 for fixing the stator winding 30 can be improved.

The power assembly according to the embodiment of the third aspect of the present utility model includes the motor 2000 according to the above-described second aspect of the present utility model, a decelerator, an input shaft of which is connected with a rotating shaft of the motor 2000, and a control unit for controlling the motor 2000. When the rotor on the motor 2000 rotates at a high speed, the rotating shaft rotates at a high speed at the same time, the rotating shaft is connected with the input shaft of the speed reducer to drive the input shaft to rotate, the rotating moment generated on the motor 2000 is transmitted to the input shaft in the speed reducer, and the speed reducer converts the rotating moment of the high-speed rotation into the rotating moment of the low-speed rotation, so that the rotating speed output by the speed reducer is lower than the rotating speed of the rotating shaft, and the speed reduction effect is realized.

According to the power assembly of the embodiment of the utility model, by arranging the motor 2000, the stator core 10 of the stator assembly 100 adopts the structural scheme of the open slot without pole shoes, so that the flat wire continuous winding is ensured to be smoothly assembled on the stator core 10, and by arranging a plurality of fixing rings 2 at intervals along the axial direction of the stator core 10, as the limit strips 3 accommodated in the stator slot opening 14 are connected with the fixing rings 2, the limit strips 3 can be fixed in the stator slot opening 14 through the fixing rings 2, so that the whole slot wedge piece 20 is fixed relative to the stator core 10, and a slot wedge fixing structure is not required to be arranged on the stator core 10, thereby ensuring the efficiency of the motor 2000, ensuring the whole vehicle performance and solving the problem of winding fixing under the conditions of no pole shoe structure and no slot wedge fixing structure arranged on the stator core 10; in addition, as the number of the fixing rings 2 connected with the limit strips 3 is multiple, the overall structural strength of the slot wedge 20 can be increased, and the stability and reliability of the slot wedge 20 for fixing the stator winding 30 can be improved.

As shown in fig. 15, a vehicle 3000 according to a fourth aspect of the present utility model includes a powertrain according to the above-described third aspect of the present utility model.

The vehicle 3000 here may be a new energy vehicle 3000, and in some embodiments, the new energy vehicle 3000 may be a pure electric vehicle 3000 having the motor 2000 as a main driving force, and in other embodiments, the new energy vehicle 3000 may be a hybrid vehicle 3000 having both the internal combustion engine and the motor 2000 as main driving forces. Regarding the internal combustion engine and the motor 2000 that supply driving power to the new energy vehicle 3000 mentioned in the above embodiments, the internal combustion engine may use gasoline, diesel oil, hydrogen gas, or the like as fuel, and the manner of supplying electric power to the motor 2000 may use a power battery, a hydrogen fuel cell, or the like, without being particularly limited thereto. The present utility model is not limited to the configuration of the new energy vehicle 3000 or the like.

According to the vehicle 3000 of the embodiment of the present utility model, by arranging the above power assembly, the stator core 10 of the stator assembly 100 adopts the structure scheme of the open slot without pole shoes, so as to ensure that the flat wire continuous winding is smoothly assembled on the stator core 10, and by arranging the plurality of fixing rings 2 at intervals along the axial direction of the stator core 10, since the limit strips 3 accommodated in the stator slot opening 14 are connected with the fixing rings 2, the limit strips 3 can be fixed in the stator slot opening 14 through the fixing rings 2, so that the whole slot wedge member 20 is fixed relatively to the stator core 10, and no slot wedge fixing structure is required to be arranged on the stator core 10, thereby ensuring the efficiency of the motor 2000, ensuring the performance of the whole vehicle, and solving the problem of fixing the winding under the condition that no pole shoe structure and no slot wedge fixing structure is arranged on the stator core 10; in addition, as the number of the fixing rings 2 connected with the limit strips 3 is multiple, the overall structural strength of the slot wedge 20 can be increased, and the stability and reliability of the slot wedge 20 for fixing the stator winding 30 can be improved.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," 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, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (17)

1. A stator assembly, comprising:

the stator iron core is provided with a rotor hole and a plurality of stator teeth positioned on the outer peripheral side of the rotor hole, the stator teeth are distributed at intervals along the circumferential direction of the rotor hole, stator grooves are defined between two adjacent stator teeth, and radial openings of the stator grooves facing the rotor hole are stator slots;

a stator winding, which is a flat wire continuous winding and is at least partially accommodated in the stator slot;

the slot wedge comprises a plurality of fixed rings and limiting strips, the fixed rings encircle the central axis of the stator core, the fixed rings are multiple, the fixed rings are arranged at intervals along the axial direction of the stator core, the limiting strips are arranged along the axial direction of the stator core and are connected with the fixed rings, the limiting strips are multiple, the limiting strips are arranged along the circumferential intervals of the fixed rings, and at least part of the limiting strips are contained in the notch of the stator to limit the stator winding.

2. The stator assembly of claim 1 wherein at least one of the retaining rings is formed separately from the stop bars; alternatively, the slot wedge is an integral molding.

3. The stator assembly of claim 1, wherein at least a portion of the stop bars are snap-fit connected to at least one of the retaining rings.

4. A stator assembly according to claim 3 wherein the outer peripheral wall of the retaining ring is formed with mating notches, portions of the stop bars being received in the mating notches.

5. A stator assembly according to claim 3 wherein the stop bar is formed with a hook which hooks the retaining ring.

6. The stator assembly of claim 1, wherein at least one of the fixing rings includes a plurality of positioning portions disposed at intervals along a circumferential direction of the stator core, the positioning portions being arc-shaped, the plurality of positioning portions being sequentially arranged in the circumferential direction of the stator core to form the fixing ring, the plurality of positioning portions being respectively formed independently.

7. The stator assembly of claim 6, wherein the positioning portion is integrally formed with the stop bar or the positioning portion is snap-fit with the stop bar.

8. The stator assembly of claim 1, wherein the number of the fixing rings is two, and the two fixing rings are a first fixing ring and a second fixing ring, respectively, and the first fixing ring and the second fixing ring are respectively located at two axial sides of the stator core.

9. The stator assembly of claim 8, wherein the first and second retaining rings are each snap-fit to the axial ends of the stop bar.

10. The stator assembly of claim 8, wherein the first retaining ring is integrally formed with the stop bar and the second retaining ring is snap-fit with the stop bar.

11. The stator assembly according to claim 8, wherein the first fixing ring is an integral molding piece and is clamped with the limiting strip, the second fixing ring comprises two positioning portions which are arranged along the circumferential direction of the stator core at intervals, the positioning portions are arc-shaped, the two positioning portions are sequentially arranged in the circumferential direction of the stator core to form the second fixing ring, the two positioning portions are respectively and independently molded, and the limiting strip and the corresponding positioning portion are integrally molded.

12. The stator assembly of claim 8, wherein the first retaining ring is integrally formed with a portion of the stop bar and the second retaining ring is integrally formed with another portion of the stop bar.

13. The stator assembly of claim 12, wherein the first retaining ring is integrally formed with a portion of the stop bar to form a first sub-slot wedge and the second retaining ring is integrally formed with another portion of the stop bar to form a second sub-slot wedge, the first sub-slot wedge and the second sub-slot wedge being identical in construction.

14. The stator assembly of claim 8, wherein the rotor mated to the stator assembly includes a rotor core disposed within the rotor bore and rotor end plates disposed axially on either side of the rotor core, the first retaining ring adapted to surround an outer peripheral side of one of the rotor end plates, and the second retaining ring adapted to surround an outer peripheral side of the other of the rotor end plates.

15. An electric machine comprising the stator assembly of any one of claims 1-14.

16. A powertrain, comprising:

The motor of claim 15;

the input shaft of the speed reducer is connected with the rotating shaft of the motor;

and the control unit is used for controlling the motor.

17. A vehicle comprising the powertrain of claim 16.