A skeleton chain, stator assembly and motor

Abstract

The application provides a skeleton chain, which comprises a plurality of sub-skeletons, two adjacent sub-skeletons are a first skeleton and a second skeleton respectively, the first skeleton comprises a first inner baffle close to a winding position and a first outer baffle away from the winding position, and a first wire passing groove is arranged between the first inner baffle and the first outer baffle; the second skeleton comprises a second inner baffle close to the winding position and a second outer baffle away from the winding position, and a second wire passing groove is arranged between the second inner baffle and the second outer baffle; a first preset length of the first inner baffle close to the second inner baffle is a first inner section, a second preset length of the second inner baffle close to the first inner baffle is a second inner section, one side of the outer baffle is an outer side, and one side of the inner baffle is an inner side; when the skeleton chain is in a circular shape, the first inner section and the second inner section simultaneously protrude towards the outer side, so that the technical problem that the bridge wire is difficult to maintain a tension state after the skeleton chain provided with a wide wire passing groove is formed into a circle in the prior art can be solved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electric machines, and particularly relates to a skeleton chain, a stator assembly and an electric machine. BACKGROUND

[0002] A household electric machine generally adopts a plastic-sealed stator structure. The stator of the electric machine is generally designed as a multi-phase winding, multi-slot and multi-pole concentrated winding. For example, a three-phase 12-slot 8-pole concentrated winding design stator. The first phase winding is wound on the 1st tooth, the 4th tooth, the 7th tooth and the 10th tooth of the stator. Thus, the middle of the 1st tooth to the 4th tooth has a winding bridge line crossing the 2nd tooth and the 3rd tooth. Thus, the middle of the 4th tooth to the 7th tooth has a winding bridge line crossing the 5th tooth and the 6th tooth. Similarly, each phase winding has multiple bridge lines. In order to improve the production efficiency of the electric machine, the stator core of the inner rotor electric machine is generally designed as a straight strip shape (or a block shape). The stator core is wrapped with an insulating skeleton, and the winding is wound thereon. The bridge line of the winding passes through the skeleton of the yoke of the stator core, and then the straight strip-shaped stator core is spliced into a circular shape. Since each small piece of the straight strip-shaped stator core is connected by a V-shaped slot, and the connection between the adjacent two stator cores is on the outer side in the radial direction, the V-shaped slots are combined after splicing into a whole circle, and the circumference of the yoke of the stator core becomes smaller. The bridge line is tight on the straight strip-shaped skeleton, but after splicing into a circle, the bridge line becomes loose, and the more slots the bridge line crosses, the looser the bridge line becomes. Without the support of the insulating skeleton, the loose bridge line moves together with the plastic sealing material during the injection molding of the stator, and is particularly prone to be broken, causing short circuit of the electric machine.

[0003] In order to ensure that the bridge line is still tight after being spliced into a circle, the prior art reduces the width of the wire passing slot to ensure the tightness of the bridge line. However, the width of the wire passing slot is too small, which is not conducive to wiring.

[0004] How to facilitate wiring in the wire passing slot and ensure that the bridge line remains in a tight state after the straight strip-shaped stator is spliced into a circle is a technical problem to be solved at present. SUMMARY

[0005] Therefore, the present application provides a skeleton chain, a stator assembly and an electric machine, which can solve the technical problem that the bridge line cannot remain in a tight state after the skeleton chain with a wide wire passing slot is spliced into a circle in the prior art.

[0006] The present application provides a skeleton chain for a stator chain, which has a straight chain shape when unfolded and a circular shape when bent. The skeleton chain comprises a plurality of sub-skeletons. Adjacent two sub-skeletons are a first skeleton and a second skeleton. The first skeleton comprises a first inner baffle close to a winding position and a first outer baffle away from the winding position. A first wire passing slot is formed between the first inner baffle and the first outer baffle. The second skeleton comprises a second inner baffle close to the winding position and a second outer baffle away from the winding position. A second wire passing slot is formed between the second inner baffle and the second outer baffle.

[0007] The first inner baffle plate is close to a first preset length of the second inner baffle plate, and the second inner baffle plate is close to a second preset length of the first inner baffle plate. When the skeleton chain is a straight chain, the first wire passing groove and the second wire passing groove are on a straight line. The side where the outer baffle plate is located is the outer side, and the side where the inner baffle plate is located is the inner side. When the skeleton chain is a circular shape, the first inner segment and the second inner segment simultaneously protrude towards the outer side.

[0008] In some embodiments, the first outer baffle plate is close to a third preset length of the second outer baffle plate, and the second outer baffle plate is close to a fourth preset length of the first outer baffle plate.

[0009] When the skeleton chain is a circular shape, the first inner segment and the second inner segment are located between the first outer segment and the second outer segment.

[0010] In some embodiments, the first wire passing groove includes a first bottom surface, a gap is formed between the first inner segment and the first bottom surface, and one end of the first inner segment close to the inner side is fixed on the first bottom surface. The second wire passing groove includes a second bottom surface, a gap is formed between the second inner segment and the second bottom surface, and one end of the second inner segment close to the inner side is fixed on the second bottom surface.

[0011] When the skeleton chain is a circular shape, the first inner segment and the second inner segment are pressed against each other.

[0012] In some embodiments, the first inner segment and the second inner segment are flexibly fixedly connected together.

[0013] In some embodiments, one end of the first inner segment close to the second inner segment is provided with a first notch, one end of the second inner segment close to the first inner segment is provided with a second notch, and the first notch and the second notch are communicated.

[0014] In some embodiments, the first inner baffle plate includes a first fixed segment fixed on the first bottom surface, and a first gap is provided between the first inner segment and the fixed segment, and the first gap is open towards the outer side. The second inner baffle plate includes a second fixed segment fixed on the second bottom surface, and a second gap is provided between the second inner segment and the fixed segment, and the second gap is open towards the outer side.

[0015] In some embodiments, one side of the first inner segment away from the first outer baffle plate is provided with a first stretching groove, and one side of the second inner segment away from the second outer baffle plate is provided with a second stretching groove.

[0016] In some embodiments, the first stretching groove is arranged at one end of the first inner segment close to the connection of the first inner segment with the first bottom surface, and the second stretching groove is arranged at one end of the second inner segment close to the connection of the second inner segment with the second bottom surface.

[0017] In some embodiments, the first bottom surface is arranged on a first bottom plate, the second bottom surface is arranged on a second bottom plate, and a connecting part between the first skeleton and the second skeleton is connected together at the outer side; when the skeleton chain is in a straight chain shape, a horn-shaped space with an opening facing the inner side is formed between the first bottom plate and the second bottom plate.

[0018] The application further provides a stator assembly comprising a stator chain and the skeleton chain.

[0019] The application further provides an electric machine comprising a rotor and the stator assembly.

[0020] The application solves the technical problem of loose bridge wire after the chain-shaped insulating skeleton is formed into a circle by arranging an inner segment on the inner baffle of a sub-skeleton, and when the skeleton chain is formed into a circle, the adjacent inner segments of two adjacent sub-skeletons are extruded towards the outer side, thereby supporting the bridge wire in the wire passing groove, and achieving the effect of tightening the bridge wire. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. The drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creative labor.

[0022] Figure 1 is a straight chain-shaped stator core of the embodiment of the application when the skeleton chain is arranged;

[0023] Figure 2 is a circular stator core of the embodiment of the application when the skeleton chain is arranged;

[0024] Figure 3 is a single stator core structure schematic diagram of the embodiment of the application;

[0025] Figure 4 is a single sub-skeleton structure schematic diagram of the embodiment of the application;

[0026] Figure 5 is a single stator core structure schematic diagram of the embodiment of the application when the sub-skeleton is arranged;

[0027] Figure 6is a partial oblique view of a skeleton chain of an embodiment of the present application in a straight chain shape;

[0028] Figure 7 is a partial oblique view of a skeleton chain of an embodiment of the present application in a circular shape;

[0029] Figure 8 is an axial partial schematic view of a skeleton chain of an embodiment of the present application in a straight chain shape and provided with a bridging line;

[0030] Figure 9 is an axial partial schematic view of a skeleton chain of an embodiment of the present application in a circular shape and provided with a bridging line;

[0031] Figure 10 is a schematic view of the flow of injection material when a stator of an embodiment of the present application is injection molded in a mold;

[0032] Figure 11 is a schematic view of the appearance of a plastic-coated stator of an embodiment of the present application;

[0033] Figure 12 is a schematic view of the appearance of a plastic-coated stator of an embodiment of the present application; Figure 10 is an enlarged view of A in the embodiment of the present application.

[0034] The reference signs are:

[0035] 1, first skeleton; 101, first wire slot; 1021, first inner section; 102, first inner baffle; 103, first outer baffle; 1031, first outer section; 1011, first bottom surface; 1041, first notch; 1042, first accommodation slot; 1043, first stretching slot; 2, second skeleton; 201, second wire slot; 2021, second inner section; 202, second inner baffle; 203, second outer baffle; 2031, second outer section; 2011, second bottom surface; 2041, second notch; 2042, second accommodation slot; 2043, second stretching slot; 3, stator core; 4, connecting portion; 5, horn; 6, bridging line; 601, wire protection slot; 7, through slot. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without any creative labor fall within the scope of protection of the present application.

[0037] In the description of the application, it should be understood that the orientation words such as "front, back, up, down, left, right", "transverse, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or positional relationship are generally based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the application and simplifying the description, without the opposite description, these orientation words do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the scope of protection of the application; The orientation words "inner, outer" refer to the inner and outer of the contour of each component.

[0038] For the convenience of description, spatial relative terms such as "over", "above", "upper surface", "upper" and the like can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "over" other devices or structures will be positioned "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below" orientations. The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein are interpreted accordingly.

[0039] In addition, it should be noted that the use of "first", "second" and the like to define parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning unless otherwise stated, therefore it cannot be understood as a limitation on the scope of protection of the application.

[0040] For reference Figures 1-12 As shown in the drawings, the skeleton chain provided by the application is used for the stator chain, the skeleton chain has a straight chain shape formed by unfolding and a round shape formed by bending, the skeleton chain comprises a plurality of sub-skeletons, two adjacent sub-skeletons are a first skeleton 1 and a second skeleton 2 respectively, the first skeleton 1 comprises a first inner baffle 102 close to a winding position and a first outer baffle 103 away from the winding position, and a first wire passing groove 101 is formed between the first inner baffle 102 and the first outer baffle 103; the second skeleton 2 comprises a second inner baffle 202 close to the winding position and a second outer baffle 203 away from the winding position, and a second wire passing groove 201 is formed between the second inner baffle 202 and the second outer baffle 203;

[0041] The first inner baffle 102 is close to a first preset length of the second inner baffle 202, and the first inner baffle 102 is close to a second preset length of the second inner baffle 202. When the skeleton chain is a straight chain, the first wire passing groove 101 and the second wire passing groove 201 are on a straight line. The side where the outer baffle is located is the outer side, and the side where the inner baffle is located is the inner side. When the skeleton chain is a circular shape, the first inner segment 1021 and the second inner segment 2021 are simultaneously convex to the outer side.

[0042] The winding position is the position of the winding. The wire passing groove is a wire groove through which the bridge wire between different windings passes.

[0043] The bridge wire 6 of different windings on the stator chain is arranged in the wire passing groove. When the stator chain is a straight chain, the winding is arranged on the skeleton, and the bridge wire 6 is arranged in the wire passing groove. When the stator chain is circular, the skeleton chain is also circular. Since the wire passing groove has a certain width, the bridge wire 6 in the wire passing groove is not closely attached to the inner baffle. After the skeleton chain is circular, the bridge wire 6 is loosely laid in the wire passing groove, which can cause the bridge wire 6 to be broken by the plastic sealing material during subsequent injection molding, resulting in a short circuit of the motor. When the skeleton chain is curved to be circular towards the inner side, the first inner segment 1021 of the first inner baffle 102 and the second inner segment 2021 of the second inner baffle 202 are simultaneously convex to the outer side as part of the inner baffle, supporting the bridge wire 6 in the wire passing groove, thereby stretching the bridge wire 6 in the wire passing groove to a tensioned state, thereby avoiding the loose bridge wire 6 being broken by the injection material during subsequent injection molding. In addition, the bridge wire 6 is protected by the inner baffle and the outer baffle (the part of the bridge wire 6 protected by the inner baffle and the outer baffle in the radial direction will not be impacted by the injection material along the radial direction), the bridge wire 6 impacted by the injection material is relatively short, and the bridge wire 6 impacted by the injection material is supported by the first inner segment 1021 and the second inner segment 2021, further protecting the safety of the bridge wire 6. Since the first inner segment 1021 and the second inner segment 2021 are convex to the outer side, the width of the wire passing groove (the distance between the inner baffle and the outer baffle) is wider, which is convenient for wiring.

[0044] Further, as shown in Figure 8 and Figure 9 After the skeleton chain is circular, the bridge wire is supported by the first inner segment 1021 and the second inner segment 2021, and the bridge wire 6 is convex to the outer side. Due to the blocking of the first outer baffle 103 and the second outer baffle 203, most of the bridge wire 6 is closely attached to the first outer baffle 103 and the second outer baffle 203 in the wire passing groove, and a small part of the bridge wire 6 is closely attached to the inner baffle. As shown in Figure 10As shown, when the injection material is injected from the radial direction of the stator, the outer baffle can well protect the bridge line, and the bridge line close to the inner baffle 6 is supported by the inner baffle, so that the impact of the injection material on the bridge line 6 is small; in this way, the inner baffle and the outer baffle both protect the bridge line 6.

[0045] Further, as shown in the drawings, Figure 12 A wire protection groove 601 is arranged on the outer baffle, and when the bridge line 6 is tensioned under the action of the outward protrusion of the two adjacent inner segments, the bridge line 6 is blocked by the outer baffle. By arranging the wire protection groove 601 on the outer baffle, the bridge line at least partially enters the wire protection groove, so that the impact of the injection material flowing from top to bottom (from the perspective of the drawings) on the bridge line is smaller, further improving the safety and stability of the bridge line 6. Figure 12

[0046] In the present application, "radial" refers to the direction of the inner side and the outer side connection, or the radial direction of the circular skeleton chain after the skeleton chain is formed into a circle; "axial" refers to the axial direction of the skeleton chain after the skeleton chain is formed into a circle; "circumferential" refers to the circumferential direction of the skeleton chain after the skeleton chain is formed into a circle.

[0047] Further, the wire groove is arranged on the sub-skeleton corresponding to the plane of the yoke of the stator core 3.

[0048] Preferably, as shown in the drawings, Figure 8 and Figure 9 The first outer baffle 103 is close to a first outer segment 1031 of a third predetermined length of the second outer baffle 203, and the second outer baffle 203 is close to a second outer segment 2031 of a fourth predetermined length of the first outer baffle 103.

[0049] When the skeleton chain is circular, the first inner segment 1021 and the second inner segment 2021 are located between the first outer segment 1031 and the second outer segment 2031.

[0050] Further, a first sub-wire groove is formed between the first outer segment 1031 and the first inner segment 1021, and a second sub-wire groove is formed between the second outer segment and the first inner segment 1021, so that the bridge line 6 in the first sub-wire groove and the bridge line 6 in the second sub-wire groove are not on a straight line and cannot form a circle; this prolongs the length of the wire groove, and further enables the bridge line 6 in the wire groove to be in a tensioned state.

[0051] ​Further, the distance between the first sub-wire slot and the second sub-wire slot gradually decreases from the inner side to the outer side, that is, the first sub-wire slot and the second sub-wire slot form an "eight" shape, which makes the bridge wire 6 also form an "eight" shape in the two sub-wire slots, avoids the bridge wire 6 from bending too much in the two sub-wire slots to reduce the structural strength of the bridge wire 6, and also avoids the bridge wire 6 from rubbing against the inner baffle and the outer baffle to cause the insulating paint on the surface of the bridge wire 6 to fall off.

[0052] Preferably, as shown in Figure 8 and Figure 9 , the first wire slot 101 includes a first bottom surface 1011, a gap is formed between the first inner section 1021 and the first bottom surface 1011, and the end of the first inner section 1021 close to the inner side is fixed on the first bottom surface 1011; the second wire slot 201 includes a second bottom surface 2011, a gap is formed between the second inner section 2021 and the second bottom surface 2011, and the end of the second inner section 2021 close to the inner side is fixed on the second bottom surface 2011;

[0053] When the skeleton chain is circular, the first inner section 1021 and the second inner section 2021 are pressed against each other.

[0054] When the skeleton chain is circular, the first inner section 1021 and the second inner section 2021 are pressed against each other. During the pressing process, the first inner section 1021 and the second inner section 2021 give each other an outward force, thereby ensuring that the first inner section 1021 and the second inner section 2021 protrude outward, avoiding deformation of the first inner section 1021 and the second inner section 2021 in other directions, and thereby ensuring the tension state of the bridge wire 6.

[0055] The end of the first inner section 1021 close to the inner side is fixed on the first bottom surface 1011, which means that when the skeleton chain is in a circular state, the end of the first inner section 1021 close to the inner side is fixed on the first bottom surface 1011, and when the skeleton chain is a straight chain, the end of the first inner section 1021 fixed on the first bottom surface 1011 is away from the end of the second inner section 2021 fixed on the second bottom surface 2011.

[0056] Preferably, as shown in Figure 8 and Figure 9 , the first inner section 1021 and the second inner section 2021 are flexibly fixed and connected together.

[0057] The flexible fixed connection is a connection form fixed together, which has flexibility in toughness stiffness. Then when the first bottom plate and the second bottom plate extrude each other, one end of the first inner section 1021 towards the second inner section 2021 and one end of the second inner section 2021 towards the second inner section 2021 will move away from each other during the extrusion of the first bottom plate and the second bottom plate, and the extrusion of the first inner section 1021 and the second inner section 2021 will form a scraping on the bridge line 6, which will cause the insulating paint on the surface of the bridge line 6 to fall off. By connecting the first inner section 1021 and the second inner section 2021 together, the insulating paint on the surface of the bridge line 6 is prevented from being scraped off, and the integrity of the bridge line 6 is ensured.

[0058] Preferably, as shown in Figure 8 and Figure 9 , the first inner section 1021 is provided with a first notch 1041 at one end close to the second inner section 2021, and the second inner section 2021 is provided with a second notch 2041 at one end close to the first inner section 1021, and the first notch 1041 and the second notch 2041 are communicated.

[0059] By setting the first notch 1041 and the second notch 2041 communicated with each other, when the two inner sections extrude each other, the first notch 1041 and the second notch 2041 serve as the space for the extrusion and deformation of the first inner section 1021 and the second inner section 2021, avoiding the overpressure tearing of the two inner sections during the extrusion; the setting of the two notches also reduces the force required for the extrusion of the two inner sections, facilitating the formation of the skeleton chain into a circle.

[0060] Preferably, as shown in Figure 8 and Figure 9 , the first inner section 1021 is provided with a first notch 1041 at one end close to the second inner section 2021, and the second inner section 2021 is provided with a second notch 2041 at one end close to the first inner section 1021, and the first notch 1041 and the second notch 2041 are communicated.

[0061] In the process of protruding the first inner section 1021 and the second inner section 2021 towards the outside, the first inner section 1021 moves towards the outside (or, rotates towards the outside around the connection between the first inner section 1021 and the first bottom surface 1011), the first displacement slot 1042 serves as a space for the first inner section 1021 to move towards the outside, which reduces the resistance of the first inner section 1021 to move towards the outside, and avoids the first inner section 1021 from being deformed in the axial direction under the extrusion force, which is not conducive to the skeleton chain to be circular. In addition, when the first inner section 1021 is deformed in the axial direction, the first inner section 1021 will protrude towards the inside of the first wire passing slot 101 due to the effect of the first bottom surface 1011, which will cause the bridge wire 6 to be too tight. Similarly, the second displacement slot 2042 has the same effect as the first displacement slot 1042.

[0062] Further, the fixed section is provided with a through slot 7 which communicates the wire winding slot and the wire passing slot, and one end of the winding passes through the through slot 7 and enters the wire passing slot.

[0063] Preferably, as shown in Figure 8 and Figure 9 , the first inner section 1021 is provided with a first stretching slot 1043 on the side away from the first outer baffle 103, and the second inner section 2021 is provided with a second stretching slot 2043 on the side away from the second outer baffle 203.

[0064] In the process of the skeleton chain being circular, the end of the first inner section 1021 close to the second inner section 2021 moves (or, rotates) towards the outside, the side of the first inner section 1021 away from the first outer baffle 103 is subjected to a pulling force, and by providing the first stretching slot 1043, the first inner section 1021 can better rotate along its own plane, which reduces the resistance of the first support to move and avoids the first inner section 1021 from being deformed in the axial direction. Similarly, the second stretching slot 2043 has the same technical effect as the first stretching slot 1043.

[0065] Preferably, as shown in Figure 8 and Figure 9 , the first stretching slot 1043 is arranged at the end of the first inner section 1021 close to the connection between the first inner section 1021 and the first bottom surface 1011, and the second stretching slot 2043 is arranged at the end of the second inner section 2021 close to the connection between the second inner section 2021 and the second bottom surface 2011.

[0066] When the first inner section 1021 rotates, it rotates around the connection between the first inner section 1021 and the first bottom surface 1011. The first stretching groove 1043 is arranged near the connection between the first inner section 1021 and the first bottom surface 1011, so that the rigidity of the middle part of the first inner section 1021 is ensured, and the possibility of deformation of the first inner section 1021 in the axial direction during rotation is reduced, which is beneficial to avoid that the bridge wire 6 in the through groove is too tight after the skeleton chain is formed into a circle.

[0067] Preferably, as shown in Figure 8 and Figure 9 The first bottom surface 1011 is arranged on the first bottom plate, the second bottom surface 2011 is arranged on the second bottom plate, the connection part 4 between the first skeleton and the second skeleton is connected together, and the connection part 4 is located on the outer side. When the skeleton chain is in a straight chain shape, the first bottom plate and the second bottom plate form a horn mouth 5 space with an opening towards the inner side.

[0068] Through the horn mouth 5 with an opening towards the inner side formed between the first bottom plate and the second bottom plate, when the skeleton chain is formed into a circle, the first bottom plate and the second bottom plate rotate towards the inner side around the connection part 4, the horn mouth 5 space provides space for the rotation of the first bottom plate and the second bottom plate, and ensures that the first bottom plate and the second bottom plate can rotate following the sub-skeleton without interfering with each other.

[0069] The skeleton chain of the application is integrally injection molded, and the injection molding material is a high molecular insulating material.

[0070] The application further provides a stator assembly comprising a stator chain and the skeleton chain, and the skeleton chain is arranged on the stator chain.

[0071] The application further provides an electric machine, as shown in Figure 11 which comprises a rotor and the stator assembly.

[0072] It is easy for those skilled in the art to understand that the advantageous technical features of the above-mentioned modes can be freely combined and superimposed without conflict.

[0073] The above description is only the preferred embodiment of the application, and is not intended to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application. The above description is only the preferred embodiment of the application, and it should be pointed out that, for those skilled in the art, without departing from the technical principles of the application, a number of improvements and modifications can be made, and these improvements and modifications shall be regarded as the protection scope of the application.

Claims

1. A skeleton chain for a stator chain, wherein the skeleton chain has a straight chain shape formed by unfolding and a circular shape formed by bending, and the skeleton chain includes a plurality of sub-skeletons, characterized in that: The two adjacent sub-frames are respectively a first frame (1) and a second frame (2), wherein the first frame (1) comprises a first inner baffle (102) close to the winding position and a first outer baffle (103) away from the winding position, and a first wire groove (101) is provided between the first inner baffle (102) and the first outer baffle (103); the second frame (2) comprises a second inner baffle (202) close to the winding position and a second outer baffle (203) away from the winding position, and a second wire groove (201) is provided between the second inner baffle (202) and the second outer baffle (203); A section of the first inner baffle (102) close to the second inner baffle (202) with a first preset length is a first inner section (1021), and a section of the second inner baffle (202) close to the first inner baffle (102) with a second preset length is a second inner section (2021). When the skeleton chain is in a straight chain shape, the first wire groove (101) and the second wire groove (201) are in a straight line; the side where the outer baffle is located is the outer side, and the side where the inner baffle is located is the inner side. When the skeleton chain is in a circular shape, the first inner section (1021) and the second inner section (2021) are simultaneously convex toward the outside.

2. The skeleton chain according to claim 1, characterized in that: A section of the first outer baffle (103) close to the second outer baffle (203) with a third preset length is a first outer section (1031), and a section of the second outer baffle (203) close to the first outer baffle (103) with a fourth preset length is a second outer section (2031); When the skeleton chain is circular, the first inner section (1021) and the second inner section (2021) are located between the first outer section (1031) and the second outer section (2031).

3. The skeleton chain according to claim 1, characterized in that: The first wire duct (101) includes a first bottom surface (1011), a gap is formed between the first inner section (1021) and the first bottom surface (1011), and an end of the first inner section (1021) close to the inner side is fixed to the first bottom surface (1011); the second wire duct (201) includes a second bottom surface (2011), a gap is formed between the second inner section (2021) and the second bottom surface (2011), and an end of the second inner section (2021) close to the inner side is fixed to the second bottom surface (2011); When the skeleton chain is circular, the first inner section (1021) and the second inner section (2021) squeeze each other.

4. The skeleton chain according to claim 3, characterized in that: The first inner section (1021) and the second inner section (2021) are flexibly and fixedly connected together.

5. The skeleton chain according to claim 4, characterized in that: A first notch (1041) is provided at one end of the first inner section (1021) close to the second inner section (2021), and a second notch (2041) is provided at one end of the second inner section (2021) close to the first inner section (1021), and the first notch (1041) and the second notch (2041) are in communication.

6. The skeleton chain according to claim 3, characterized in that: The first inner baffle (102) includes a first fixed section fixed on the first bottom surface (1011), and a first clearance groove (1042) opening toward the outside is provided between the first inner section (1021) and the fixed section; the second inner baffle (202) includes a second fixed section fixed on the second bottom surface (2011), and a second clearance groove (2042) opening toward the outside is provided between the second inner section (2021) and the fixed section.

7. The skeleton chain according to claim 3, characterized in that: A first stretching groove (1043) is provided on the side of the first inner section (1021) facing away from the first outer baffle (103), and a second stretching groove (2043) is provided on the side of the second inner section (2021) facing away from the second outer baffle (203).

8. The skeleton chain according to claim 7, characterized in that: The first stretching groove (1043) is provided at one end of the first inner section (1021) close to the connection between the first inner section and the first bottom surface (1011), and the second stretching groove (2043) is provided at one end of the second inner section (2021) close to the connection between the second inner section and the second bottom surface (2011).

9. The skeleton chain according to any one of claims 3 to 8, characterized in that: The first bottom surface (1011) is arranged on a first bottom plate, the second bottom surface (2011) is arranged on a second bottom plate, the first frame (1) and the second frame (2) are connected together via a connecting portion (4), and the connecting portion (4) is located on the outside; when the frame chain is in a straight chain shape, a trumpet-shaped space (5) with an opening facing inward is formed between the first bottom plate and the second bottom plate.

10. A stator assembly, characterized in that: It comprises a stator chain and the skeleton chain according to any one of claims 1 to 9, wherein the skeleton chain is arranged on the stator chain.

11. A motor, characterized in that: The invention comprises a rotor and the stator assembly according to claim 10.

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