CN115118049A - Stator framework structure, stator structure and motor - Google Patents

Abstract

The invention belongs to the technical field of motors and discloses a stator framework structure, a stator structure and a motor, wherein the stator framework structure comprises a plurality of coil inserting modules which are spliced along the circumferential direction to form an annular structure; each offline module comprises a stator core, a first framework and a second framework, the first framework is clamped at one end of the stator core, the second framework is clamped at the other end of the stator core, and notches are formed in two sides of the offline module after the stator core, the first framework and the second framework are matched; before the stator structure is assembled, each coil inserting module respectively completes corresponding winding, a back winding type winding mode is adopted, enough space can be used for completing corresponding winding before the stator structure is not assembled, the winding function can be achieved through an automatic winding machine, manual threading is not needed, and the advantage of high coil inserting efficiency is achieved; moreover, the modularized structure allows the tooth scheme to be adjusted within a certain degree of freedom on the premise of meeting the requirement of automatic offline, and is convenient for designers to make fine adjustment improvement.

Description

Stator framework structure, stator structure and motor

Technical Field

The invention relates to the technical field of motors, in particular to a stator framework structure, a stator structure and a motor.

Background

The high-speed permanent magnet motor has the advantages of high power density, high efficiency, quick dynamic response, small size and high energy conservation and emission reduction, so that the high-speed permanent magnet motor is applied to air compressors, high-speed machine tools and vacuum pumps more and more.

In the field of high-speed motors, in order to reduce harmonic waves generated during the operation of the motor, a stator usually adopts a distributed winding or a back-wound winding; the end part of a stator winding of the distributed winding is high, so that the axial length of the motor is large, the rotor is slender, and the critical rotating speed is low; the back-wound stator structure can obviously shorten the size of the winding end part of the motor, save the valuable axial space of the motor and widen the limit rotating speed of the high-speed motor; however, due to space limitation, the back-wound stator cannot adopt a winding-embedding-integrated winding-off mode of distributed wound stators, cannot use an automatic winding machine like a centralized winding, and can only adopt a manual threading mode to complete stator winding off, and the winding off mode causes high winding off cost and low winding off efficiency.

Disclosure of Invention

In view of this, the invention provides a stator framework structure, a stator structure and a motor, which are configured to split a stator framework, which is an integral structure in the conventional technology, into a plurality of offline modules, and each offline module completes corresponding offline in an automated manner on the premise of sufficient space, so that manual threading is not required, and the stator framework structure, the stator structure and the motor have the advantage of high offline efficiency.

In order to solve the above problem, according to an aspect of the present application, an embodiment of the present invention provides a stator bobbin structure, which includes a plurality of offline modules, the plurality of offline modules being spliced in a circumferential direction to form an annular structure; each offline module comprises a stator core, a first framework and a second framework, the first framework is clamped at one end of the stator core, the second framework is clamped at the other end of the stator core, and notches for winding are formed in two sides of the offline module after the stator core, the first framework and the second framework are matched; wherein, both sides are along the radial both sides of loop configuration.

In some embodiments, outer slot teeth are provided between adjacent modules at the outer periphery of the ring structure and inner slot teeth are provided between adjacent modules at the inner periphery of the ring structure.

In some embodiments, the stator core includes a body, a radial section of the body is a sector, a first side of the sector has a first side surface, a second side of the sector has a second side surface, the first side surface is provided with a convex strip extending along an axial direction, and the second side surface is provided with a notch extending along the axial direction; and the adjacent offline modules are fixed through the convex strips and the notches.

In some embodiments, one end of the first side surface and the second side surface extends in a direction away from the center in the radial direction, so that one end of the stator core forms an outer recess; the other ends of the first side surface and the second side surface extend towards the direction close to the center, so that the other end of the stator core forms an inner recess.

In some embodiments, the first framework and the second framework have the same structure and respectively comprise a first inserting part and a second inserting part, the first inserting part and the second inserting part are connected through the framework body, the first inserting part is inserted into the outer recess, and the second inserting part is inserted into the inner recess.

In some embodiments, the outer periphery of the ring structure forms a first dovetail groove structure, the inner periphery of the ring structure forms a second dovetail groove structure, one face of the outer slot tooth portion has a step-shaped first protrusion, and one face of the inner slot tooth portion has a step-shaped second protrusion; the first dovetail groove structure is matched with the first protrusion, and the second dovetail groove structure is matched with the second protrusion.

In some embodiments, the stator frame structure further comprises a plurality of connecting frames, and the adjacent offline modules are fixed through the connecting frames on two end faces of the annular structure.

In some embodiments, the connection framework comprises a connection plate, and a plurality of grooves are arranged on the connection plate; the framework body is provided with a plurality of bulges; the bulges on two adjacent framework bodies can be inserted into the grooves on the same connecting plate.

In some embodiments, the connection plate extends in a radial direction such that the connection plate can overlie the first dovetail slot structure and the second dovetail slot structure.

In some embodiments, the outer slot teeth, the inner slot teeth and the offline module are integrally formed, and the inner circumference of the ring structure has a space in which a wire can be wound.

In some embodiments, glue layers are filled among the offline module, the outer slot tooth parts, the inner slot tooth parts and the connecting framework.

According to one aspect of the application, an embodiment of the invention provides a stator structure, and the stator structure comprises the stator framework structure.

According to one aspect of the application, an embodiment of the invention provides an electric machine comprising a stator structure as described above.

Compared with the prior art, the stator framework structure at least has the following beneficial effects:

the stator framework structure comprises a plurality of coil inserting modules, each coil inserting module respectively completes corresponding winding before the stator framework is assembled, a back winding type winding mode is adopted, enough space is available for completing corresponding winding before the stator framework is not assembled, an automatic winding machine can be adopted to realize a winding function, manual threading is not needed, and the advantage of high coil inserting efficiency is achieved; moreover, the modularized structure allows the tooth scheme to be adjusted within a certain degree of freedom on the premise of meeting the requirement of automatic offline, and is convenient for designers to make fine adjustment improvement.

On the other hand, the stator structure provided by the present invention is designed based on the stator skeleton structure, and the beneficial effects thereof are as follows.

On the other hand, the motor provided by the invention is designed based on the stator structure, and the beneficial effects of the motor refer to the beneficial effects of the stator structure, which are not repeated herein.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of a stator frame structure provided in an embodiment of the present invention;

FIG. 2 is an exploded view of a down line module in a stator bobbin configuration provided by an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a lower line module in a stator framework structure provided by an embodiment of the invention;

fig. 4 is a schematic structural diagram of a stator bobbin structure after winding is wound on a lower line module according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a stator core in a stator framework structure provided by an embodiment of the invention;

fig. 6 is a front view of a stator core in a stator bobbin structure provided by an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a first bobbin or a second bobbin in a stator bobbin structure provided by an embodiment of the present invention;

fig. 8 is a front view of a first bobbin or a second bobbin in a stator bobbin structure provided by an embodiment of the present invention;

fig. 9 is a side view of a first bobbin or a second bobbin in a stator bobbin structure provided by an embodiment of the present invention;

FIG. 10 is a partial assembled cross-sectional view of a stator backbone structure provided by an embodiment of the present invention;

FIG. 11 is another partially assembled cross-sectional view of a stator bobbin structure provided in accordance with an embodiment of the present invention

Fig. 12 is a schematic structural diagram of a connection frame in a stator frame structure provided by an embodiment of the present invention;

FIG. 13 is a front view of a connecting armature of the stator armature construction provided by an embodiment of the present invention;

FIG. 14 is a side view of a connecting armature in a stator armature construction provided in an embodiment of the invention

Fig. 15 is a schematic structural diagram of an outer slotted tooth portion in a stator bobbin structure provided by an embodiment of the invention;

fig. 16 is a schematic structural diagram of an inner slot tooth portion in a stator bobbin structure according to an embodiment of the present invention.

Wherein:

1. a line-off module; 2. an outer spline tooth portion; 3. an inner groove tooth part; 4. connecting the framework; 5. a winding; 11. a stator core; 12. a first skeleton; 13. a second skeleton; 21. a first protrusion; 31. a second protrusion; 41. a groove; 111. a body; 112. a first side surface; 113. a second side surface; 114. a convex strip; 115. a notch; 121. a first insertion part; 122. a second insertion part; 123. a skeleton body; 124. and (4) protruding.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, characteristics and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

In the description of the present invention, it is to be understood that the terms "first," "second," and the like in the description and in the claims, as well as in the drawings, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order; the terms "vertical", "lateral", "longitudinal", "front", "rear", "left", "right", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of describing the present invention, and do not imply that the devices or elements referred to must have a specific orientation or position, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

The embodiment provides a stator framework structure, as shown in fig. 1, the stator framework structure includes a plurality of offline modules 1, and the plurality of offline modules 1 are spliced along the circumferential direction to form an annular structure. Specifically, the plurality of offline modules 1 are spliced in the axial direction after completing the corresponding winding respectively.

In addition, as shown in fig. 2 and fig. 3, each offline module 1 includes a stator core 11, a first framework 12 and a second framework 13, the first framework 12 is connected to one end of the stator core 11 in a clamping manner, the second framework 13 is connected to the other end of the stator core 11 in a clamping manner, and gaps for winding are formed on two sides of the offline module 1 after the stator core 11, the first framework 12 and the second framework 13 are matched.

Specifically, the stator core 11 is formed by stamping a silicon steel sheet, and both ends of the stator core are provided with grooves, the first framework 12 and the second framework 13 are clamped in the grooves, and after the clamping is completed, the grooves also exist, namely, the notches are formed at both sides of the offline module 1; wherein, first skeleton 12 and second skeleton 13 are insulating skeleton, and first skeleton 12 and second skeleton 13 can not easily separate or the pine takes off after blocking stator core 11.

In addition, the two sides are two sides along the radial direction of the annular structure, namely: after the plurality of offline modules 1 are spliced into an annular structure along the circumferential direction, two gaps for winding are formed, and the two gaps are distributed along the radial direction; more specifically, on a certain radial cross section of the annular structure, along the direction from the center of the circle to the outer surface, there are a first gap, the stator core 11, and a second gap in sequence.

Specifically, the stator framework structure provided by the embodiment includes a plurality of winding unloading modules 1, before the stator structure is assembled, each winding unloading module 1 respectively completes corresponding winding, a back-winding type winding mode is adopted, before the stator structure is not assembled, enough space is available for completing corresponding winding, an automatic winding machine can be adopted to realize a winding function, manual threading is not needed, and the stator framework structure has the advantage of high winding unloading efficiency; moreover, the modularized structure allows the tooth scheme to be adjusted within a certain degree of freedom on the premise of meeting the requirement of automatic offline, and is convenient for designers to make fine adjustment improvement.

In a specific embodiment: outer slot teeth 2 are provided between the adjacent modules 1 on the outer periphery of the ring structure, and inner slot teeth 3 are provided between the adjacent modules 1 on the inner periphery of the ring structure.

Specifically, in the embodiment, a conventional stator core is split into a plurality of parts with the same shape and structure, namely, the offline modules 1, the number of the offline modules 1 is the same as the number of the inner slots and the outer slots of the stator framework structure, the outer slot tooth parts 2 and the inner slot tooth parts 3 which are arranged in the slots are split in each offline module 1, and after the corresponding modular frameworks are assembled on the yoke part of the offline module 1, batch winding can be performed on an automatic winding machine; in addition, the split outer slot tooth parts 2 and inner slot tooth parts 3 allow a designer to adjust the stator core scheme within a certain range so as to perform test comparison or enhance the motor performance in a specific aspect (such as reducing harmonic waves, increasing torque or enhancing heat dissipation) for adapting to different operating environments.

The automatic winding machine in the embodiment is used for winding a linear object on a specific workpiece, and specifically, the automatic winding machine in the field of motors is as follows: and winding the enameled wire on the offline module 1. The coil inserting module 1 can be placed on automatic winding equipment for winding in batches, the production efficiency is far higher than that of manual threading of a traditional back-wound stator, the required manpower is less, and the coil inserting module 1 after winding can be used for being assembled into a whole stator core together with other parts in a matched mode.

In a specific embodiment:

as shown in fig. 5 and 6, the stator core 11 includes a body 111, a radial cross section of the body 111 is a sector, a first side of the sector has a first side surface 112, a second side of the sector has a second side surface 113, the first side surface 112 is provided with a convex strip 114 extending along an axial direction, and the second side surface 113 is provided with a notch 115 extending along the axial direction; the adjacent modules 1 are fixed by the convex strips 114 and the notches 115.

The protruding strips 114 and the notches 115 both extend along the axial direction of the annular structure, and the protruding direction of the protruding strips 114 and the recessed direction of the notches 115 both extend along the circumferential direction of the annular structure.

In particular, a sector herein is understood to be a portion of a circle; the body 111, the first side surface 112, and the second side surface 113 in this embodiment are integrally formed.

For better explanation, the directions in fig. 1 are taken as the basis, and two adjacent offline modules 1 are assumed to be a first offline module and a second offline module, in the first offline module, the left side surface is assumed to be a first side surface, the first side surface 112 is provided with a convex strip 114, and the second side surface 113 is provided with a notch 115; in the second offline module, a convex strip 114 is arranged on the side surface on the left side, and a notch 115 is arranged on the side surface on the right side; thus, when the right side of the first offline module and the left side of the second offline module are attached together, the right notch 115 of the first offline module and the convex strip 114 on the left side of the second offline module are matched with each other, and radial positioning is achieved.

In a specific embodiment:

one end of the first side surface 112 and the second side surface 113 extends in a direction away from the center, so that one end of the stator core 11 forms an outer recess; the other ends of the first side surface 112 and the second side surface 113 extend toward the center so that the other end of the stator core 11 is formed with an inner recess.

For better explanation, the direction in fig. 6 is taken as a basis for explanation, one end of the first side surface 112 extends upward, one end of the second side surface 113 also extends upward, and the two extending portions and the outer surface of the body 111 form a U-shaped structure, namely, the above-mentioned outer recess; the other end of the first side surface 112 extends downwards, the other end of the second side surface 113 also extends downwards, and the two extending parts and the inner surface of the body 111 form another U-shaped structure, and the U-shaped structure is the inner recess;

the inner recess and the outer recess have two main functions, namely, the inner recess is used for being matched with the first framework 12 and the second framework 13, and the outer recess is used for winding an enameled wire to form a winding coil.

In a specific embodiment:

as shown in fig. 7, 8 and 9, the first frame 12 and the second frame 13 have the same structure, and both include a first inserting portion 121 and a second inserting portion 122, the first inserting portion 121 and the second inserting portion 122 are connected through a frame body 123, the first inserting portion 121 is inserted into the outer recess, and the second inserting portion 122 is inserted into the inner recess.

Specifically, the first inserting portion 121 and the second inserting portion 122 are portions extending from the upper end and the lower end of the frame body 123, and the extending directions are the same and both face the stator core 11, in order to be matched with the inner groove and the outer groove, the first inserting portion 121 and the second inserting portion 122 are also U-shaped structures, but the size of the first inserting portion 121 (the inserting portion above) is slightly smaller than that of the outer recess, so that the first inserting portion 121 can be completely located in the outer recess, and the size of the second inserting portion 122 (the inserting portion below) is slightly smaller than that of the inner recess, so that the second inserting portion 122 can be completely located in the inner recess.

In addition, in the embodiment, the side edges of the first insertion part 121 and the second insertion part 122, i.e., the side edges of the U-shaped structure, need to be higher than the extending sections of the first side surface 112 and the second side surface 113, because the in-slot portions of the first bobbin 12 and the second bobbin 13 need to be connected with the end surface portion of the stator core 11, and the end surface portion has a certain thickness, if the higher portions are removed, the connection between the in-slot portions and the end surface portion only remains at the bottom of the slot, which affects the strength of the first bobbin 12 and the second bobbin 13 when they exist separately, and they are easy to break during transportation.

In a specific embodiment:

as shown in fig. 11, the outer circumference of the ring structure forms a first dovetail groove structure, and the inner circumference of the ring structure forms a second dovetail groove structure, as shown in fig. 15, the outer slot tooth portion 2 has a step-shaped first projection 21 on one face, and as shown in fig. 16, the inner slot tooth portion 3 has a step-shaped second projection 31 on one face; the first dovetail groove structure cooperates with the first protrusion 21 and the second dovetail groove structure cooperates with the second protrusion 31.

Specifically, the first dovetail groove structure and the second dovetail groove structure are both structures with the groove bottom wider than the groove opening; the first and second dovetail groove structures in this embodiment are formed by steps on adjacent sides.

When the adjacent offline modules 1 are spliced together, the inner tooth root parts and the outer tooth root parts of the two offline modules form dovetail groove structures, and the structures are the same as the bottom structures of the outer slot tooth parts 2 and the inner slot tooth parts 3 which are produced additionally, so that the offline modules 1, the outer slot tooth parts 2 and the inner slot tooth parts 3 are matched; the first dovetail groove structure and the second dovetail groove structure can realize the effect of limiting the circumferential direction and the radial direction of the outer groove tooth part 2 and the inner groove tooth part 3.

In a specific embodiment:

as shown in fig. 10, 12, 13 and 14, the stator frame structure further includes a plurality of connecting frames 4, and the adjacent offline modules 1 are fixed by the connecting frames 4 on both end surfaces of the annular structure.

Specifically, the connecting frame 4 is a plate-shaped structure, and on each side of the connecting frame 4, a part of the connecting frame is in contact connection with one offline module 1, and the other part of the connecting frame is in contact connection with another offline module 1 adjacent to the offline module 1, that is, the connecting frame 4 further fixedly connects two adjacent offline modules 1 together.

In a specific embodiment:

the connecting framework 4 comprises a connecting plate, and a plurality of grooves 41 are formed in the connecting plate; a plurality of protrusions 124 are arranged on the framework body 123; the protrusions 124 on two adjacent framework bodies 123 can be inserted into the grooves 41 on the same connecting plate.

Specifically, two rows of groove units are arranged on the framework body 123, each row of groove units comprises at least two grooves 41, two rows of protrusion units are arranged on each framework body 123, each row of protrusion units comprises at least two protrusions 124, the first row of protrusion units is arranged at a position close to the right on the surface of the connecting plate, and the other row of protrusion units is arranged at a position close to the left on the surface of the connecting plate; the first row of the groove units and the first row of the convex units of one of the connecting plates, the other row of the groove units and the second row of the convex units of the other connecting plate are matched, and the interference fit mode is adopted, so that after the assembly is completed, the function of circumferentially connecting all the offline modules 1 together can be realized.

In a specific embodiment: the connecting plate extends along the radial direction, so that the connecting plate can cover the first dovetail groove structure and the second dovetail groove structure; the axial fixing effect of the offline module 1, the outer groove tooth parts 2 and the inner groove tooth parts 3 is realized.

In a specific embodiment:

the outer groove tooth part 2 and the inner groove tooth part 3 are integrally formed; that is to say: according to the operation requirement of the motor, the stator notch can be completely closed, namely the outer slot tooth part 2 and the inner slot tooth part 3 are not divided into blocks and are an integral part.

In a specific embodiment: the outer slot tooth part 2, the inner slot tooth part 3 and the offline module 1 are integrally formed, and the inner periphery of the annular structure is provided with a space capable of winding; that is to say: according to the operation requirement of the motor, on the premise that the notch is wide enough to meet the requirement of inserting the wire, the tooth part and the yoke iron core are not required to be separated, and the integral laminating molding is carried out.

In a specific embodiment: glue layers are filled among the offline module 1, the outer groove tooth parts 2, the inner groove tooth parts 3 and the connecting framework 4. That is to say, if the connection between the parts is not firm enough, glue can be coated on the fitting surface and then the assembly is carried out, and after the assembly, the overflowed glue is removed, and then the next operation is carried out, so as to avoid the problems that the assembly surfaces of other parts cannot be jointed and the like.

In addition, by adopting the stator framework structure provided by the embodiment, after the whole assembly is completed, the winding outgoing lines among different slots are trimmed or welded according to the actual design to form the required winding. According to different requirements of the motor, the shapes of the outer slot tooth part 2 and the inner slot tooth part 3 can be changed, the tooth part can be properly lengthened or shortened, or the width of the notch can be increased or reduced.

Example 2

The present embodiment provides a stator structure including the stator skeleton structure of embodiment 1.

Example 3

This embodiment provides a motor including the stator structure of embodiment 2.

Specifically, the motor in the present embodiment is a magnetic levitation motor.

In summary, it is easily understood by those skilled in the art that the advantageous technical features described above can be freely combined and superimposed without conflict.

The present invention is not intended to be limited to the particular embodiments shown, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (13)

1. A stator framework structure is characterized by comprising a plurality of offline modules (1), wherein the offline modules (1) are spliced along the circumferential direction to form an annular structure; each offline module (1) comprises a stator core (11), a first framework (12) and a second framework (13), the first framework (12) is connected to one end of the stator core (11) in a clamped mode, the second framework (13) is connected to the other end of the stator core (11) in a clamped mode, and gaps for winding are formed in two sides of the offline module (1) after the stator core (11), the first framework (12) and the second framework (13) are matched; wherein the two sides are two sides along the radial direction of the annular structure.

2. Stator skeleton structure according to claim 1, characterized in that outer slot teeth (2) are provided between adjacent ones of the lower line modules (1) at the outer circumference of the ring structure, and inner slot teeth (3) are provided between adjacent ones of the lower line modules (1) at the inner circumference of the ring structure.

3. The stator framework structure according to claim 2, wherein the stator core (11) comprises a body (111), the radial section of the body (111) is a sector, a first side of the sector is provided with a first side surface (112), a second side of the sector is provided with a second side surface (113), the first side surface (112) is provided with a convex strip (114) extending along the axial direction, and the second side surface (113) is provided with a notch (115) extending along the axial direction; the adjacent offline module (1) is fixed through the convex strip (114) and the notch (115).

4. A stator skeleton structure according to claim 3, characterized in that one end of the first side surface (112) and the second side surface (113) extends in a direction away from the center in a radial direction so that one end of the stator core (11) forms an outer recess; the other ends of the first side surface (112) and the second side surface (113) extend in a direction close to the center so that the other end of the stator core (11) is formed with an inner recess.

5. The stator framework structure of claim 4, wherein the first framework (12) and the second framework (13) are identical in structure and each comprise a first insertion part (121) and a second insertion part (122), the first insertion part (121) and the second insertion part (122) are connected through a framework body (123), the first insertion part (121) is inserted into the outer recess, and the second insertion part (122) is inserted into the inner recess.

6. The stator framework structure according to claim 5, wherein the outer circumference of the ring structure forms a first dovetail groove structure, the inner circumference of the ring structure forms a second dovetail groove structure, the outer slot tooth part (2) has a step-shaped first protrusion (21) on one surface, and the inner slot tooth part (3) has a step-shaped second protrusion (31) on one surface; the first dovetail groove structure is fitted with the first protrusion (21), and the second dovetail groove structure is fitted with the second protrusion (31).

7. A stator skeleton structure according to claim 6, characterized in that the stator skeleton structure further comprises a plurality of connecting skeletons (4), and on both end faces of the ring-shaped structure, the adjacent downline modules (1) are fixed by the connecting skeletons (4).

8. The stator skeleton structure of claim 7, wherein the connection skeleton (4) comprises a connection plate on which a plurality of grooves (41) are provided; a plurality of bulges (124) are arranged on the framework body (123); the protrusions (124) on two adjacent framework bodies (123) can be inserted into the grooves (41) on the same connecting plate.

9. The stator backbone structure of claim 8, wherein the connection plate extends in a radial direction such that the connection plate can cover the first dovetail groove structure and the second dovetail groove structure.

10. The stator frame structure according to any one of claims 1 to 9, wherein the outer slot teeth (2), the inner slot teeth (3), and the lower wire module (1) are integrally formed, and an inner periphery of the ring structure has a space in which a wire can be wound.

11. The stator bobbin structure according to claim 7, wherein glue layers are filled among the lower wire module (1), the outer slot teeth (2), the inner slot teeth (3) and the connecting bobbin (4).

12. A stator structure, characterized in that it comprises a stator skeleton structure according to any one of claims 1-11.

13. An electrical machine, characterized in that it comprises a stator structure according to claim 12.

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