Line crossing structure and stator assembly comprising same

Abstract

The utility model discloses a crossover structure and a stator assembly comprising the same, the crossover structure comprises a first stand column and a second stand column which are located at the wire passing ends of two adjacent stator monomers, and the first stand column and the second stand column are provided with first surfaces which are arranged oppositely and spliced with each other. The first stand column comprises a first vertex angle located at the radial outer end of the first surface and a second vertex angle located at the radial outer end of the side away from the first surface. The second stand column comprises a third vertex angle located at the radial outer end of the first surface and a fourth vertex angle located at the radial outer end of the side away from the first surface. The radial maximum size of the second stand column is located at the third vertex angle. The first stand column is located on the radial inner side of a connecting line of the second vertex angle and the third vertex angle, and the second stand column is located on the radial inner side of a connecting line of the third vertex angle and the fourth vertex angle. According to the utility model, the enamelled wire can be prevented from being broken due to pulling force, so that the enamelled wire is stably hooked through the first stand column and the second stand column, and the enamelled wire is prevented from falling off in the winding process.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field especially relates to a crossover structure and contain its stator subassembly. BACKGROUND

[0002] In the process of winding the stator subassembly, the enameled wire is wound from one winding slot to another winding slot, and the enameled wire is supported by the crossover structure located at the overline end of the stator subassembly, such as the positioning column in patent No. CN202111241099.0, but in the actual use process, the enameled wire is often squeezed by the positioning column, causing the enameled wire to wear or even break, which is caused by the unreasonable design of the shape of the positioning column and the contact position with the enameled wire. The current method is to avoid the enameled wire from being wound too tightly, which causes unnecessary displacement of the enameled wire due to vibration of the winding mechanical equipment, causing the enameled wire to deviate from its intended trajectory and fall into the adjacent or other winding slots, interrupting the production process and requiring manual intervention for correction. Moreover, it is easy to cause chaos in the winding structure, increase the risk of short circuit, and seriously reduce the efficiency and stability of automatic winding operation, which hinders the realization of efficient automatic production. Therefore, it is necessary to design a crossover structure that can effectively tighten the enameled wire and reduce the wear of the enameled wire. SUMMARY

[0003] In order to solve the technical problems of the existing stator subassembly crossover structure that can easily cause enameled wire wear or cannot tighten the enameled wire, resulting in winding errors and reducing winding efficiency, the utility model provides a crossover structure and a stator subassembly containing the same to solve the above problems.

[0004] The utility model provides a crossover structure, which comprises a first stand and a second stand located at the overline end of two adjacent stator monomers, a crossover slot is formed between the first stand, the second stand and the line separating plate on the stator monomer, the first stand and the second stand have a first surface arranged opposite to each other and spliced together, the first stand comprises a first top corner located at the radial outer end of the first surface and a second top corner located at the radial outer end of the side away from the first surface.

[0005] The second stand comprises a third top corner located at the radial outer end of the first surface and a fourth top corner located at the radial outer end of the side away from the first surface, and the maximum radial dimension of the second stand is located at the third top corner.

[0006] The first stand is located on the radial inner side of the line connecting the second top corner and the third top corner, and the second stand is located on the radial inner side of the line connecting the third top corner and the fourth top corner, and chamfers are provided at the first top corner, the second top corner, the third top corner and the fourth top corner.

[0007] In the optional embodiment of the utility model, the first surface is a plane extending along the radial direction.

[0008] In the optional embodiment of the utility model, the maximum radial dimension of the first column is at the first vertex.

[0009] In the optional embodiment of the utility model, the difference between the circumferential direction width b of the first column and the circumferential direction width c of the second column is ±0.5mm.

[0010] In the optional embodiment of the utility model, the first column and the second column are arranged along the inner edge of the wire passing end of the stator monomer.

[0011] In the optional embodiment of the utility model, the axial end surface size of the first column and the second column gradually decreases from one end connected to the stator monomer to the end away from the stator monomer.

[0012] In the optional embodiment of the utility model, the ratio of the width a of the crossover slot in the circumferential direction to the circumferential length of the stator monomer is 0.2-0.3.

[0013] In the optional embodiment of the utility model, the outer edge of the wire passing end of the stator monomer is provided with a wire protection plate, and the wire protection plate extends to the radial outside of the first column and the second column in the circumferential direction.

[0014] In the optional embodiment of the utility model, the difference between the axial height of the first column and the second column and the axial height of the wire protection plate is 3-5mm.

[0015] The utility model also proposes a stator assembly comprising a plurality of stator monomers connected in sequence and the crossover structure described above.

[0016] The utility model has the advantages of:

[0017] (1) the utility model optimizes the design of the first column and the second column forming the crossover structure, so that the enameled wire can be lifted by at least two vertices when passing through the crossover structure, and the distance between the two adjacent vertices lifting the enameled wire in sequence is kept within a reasonable range, avoiding the enameled wire from being broken due to the pulling force, so that the enameled wire is stably hooked by the first column and the second column, avoiding the enameled wire from falling off during the winding process.

[0018] (2) the utility model further protects the enameled wire through the setting of the wire protection plate, and the winding process is smoother through the reasonable configuration of the height of the wire protection plate and the column. DRAWINGS

[0019] The utility model will be further described below in combination with the drawings and examples.

[0020] Figure 1 is a perspective view of the stator assembly of the utility model;

[0021] Figure 2 is a position schematic view of the crossover structure in the in-line stator assembly (the stator assembly is in the unfolded state) of the utility model;

[0022] Figure 3 is a position schematic view of the enameled wire and the crossover structure in the first wire passing form of the utility model;

[0023] Figure 4 is a position schematic view of the enameled wire and the crossover structure in the third wire passing form of the utility model;

[0024] Figure 5 is a position schematic view of the enameled wire and the crossover structure in the second wire passing form of the utility model;

[0025] Figure 6 is a dimension marking schematic view of the crossover structure of the utility model.

[0026] In the figure, 1, stator monomer, 2, wire passing end, 3, first stand, 4, second stand, 5, crossover slot, 6, wire separating plate, 7, first surface, 8, first top corner, 9, second top corner, 10, third top corner, 11, fourth top corner, 12, first stator monomer, 13, second stator monomer, 14, first crossover slot, 15, second crossover slot, 16, crossover structure, 17, wire protection plate, 18, enameled wire. DETAILED DESCRIPTION

[0027] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as limiting the utility model.

[0028] The utility model proposes a crossover structure 16 for providing support for the enameled wire 18 in the stator assembly to transition between different winding slots, the stator assembly includes a stator core and an injection molded framework injected outside the stator core, the crossover structure 16 of the utility model is integrally formed on the injection molded framework. As shown in Figure 1 the stator assembly is formed by a plurality of stator monomers 1 with the same shape connected head to tail, one end of the stator assembly in the axial direction is a terminal end with a terminal, the other end of the stator assembly in the axial direction is a wire passing end 2, the enameled wire 18 passes through the wire passing end 2 from the winding slot of one stator monomer 1 to the winding slot of another stator monomer 1, and is supported by the crossover structure 16 at the turning place of the enameled wire 18.

[0029] The utility model discloses an Figure 2 -attached Figure 5 The crossover structure 16 is illustrated by taking a straight-line stator assembly as an example, and the crossover structure 16 is described in detail below with reference to specific embodiments.

[0030] Embodiment one

[0031] The crossover structure 16 includes a first column 3 and a second column 4 located at the wire passing end 2 of two adjacent stator monomers 1, and a crossover slot 5 is formed between the first column 3 and the second column 4 and the line separation plate 6 on the stator monomer 1 where the first column 3 and the second column 4 are located, the line separation plate 6 is located at the radial inner edge of the wire passing end 2 and is used to separate the winding on the wire winding part from the enameled wire 18 at the wire passing end 2, the first column 3 and the second column 4 have a first surface 7 arranged opposite to each other and spliced together, for the same stator monomer 1, the first column 3 and the second column 4 are respectively located at the two sides of the circumferential direction of the end of the stator monomer 1, and then the first column 3 of one of the two adjacent stator monomers 1 is arranged opposite to the second column 4 of the other stator monomer 1 and spliced together to form the crossover structure 16.

[0032] As Figures 3-5 shown, the left stator monomer 1 is a first stator monomer 12, and the right stator monomer 1 is a second stator monomer 13, the first column 3 of the first stator monomer 12 and the second column 4 of the second stator monomer 13 are spliced together to form the crossover structure 16. The first column 3 and the line separation plate 6 of the first stator monomer 12 form a first crossover slot 14 in the figure, and the second column 4 and the line separation plate 6 of the second stator monomer 13 form a second crossover slot 15.

[0033] The first column 3 includes a first top corner 8 located at the radial outer end of the first surface 7 and a second top corner 9 located at the radial outer end of the side away from the first surface 7. The second column 4 includes a third top corner 10 located at the radial outer end of the first surface 7 and a fourth top corner 11 located at the radial outer end of the side away from the first surface 7; the first top corner 8, the second top corner 9, the third top corner 10 and the fourth top corner 11 are all provided with chamfers. At least two of the four top corners are relied on to support the enameled wire 18 during the winding process, the contact length between the column and the enameled wire 18 is reduced in the form of top corner contact, thereby reducing friction, and the two top corners in contact with the enameled wire 18 form two pulling support points, the enameled wire 18 between the two top corners is pulled, and the enameled wire 18 can be tightened.

[0034] The force of pulling the enameled wire 18 is related to the tightness of winding the enameled wire 18 and the distance between two adjacent pulling support points, the greater the distance between the pulling support points, the greater the pulling force, the enameled wire 18 is easy to break at this place, otherwise the smaller the pulling force, in order to make the enameled wire 18 can withstand greater pulling force, need to make the enameled wire 18 between any two pulling support points in the case of the size of the column does not change, the pulling force is approximately equal. To this end, the utility model realizes this technical effect through the following shape design:

[0035] The maximum radial dimension of the second column 4 is located at the third top corner 10. The first column 3 is located on the radial inner side of the line connecting the second top corner 9 and the third top corner 10, that is, the first top corner 8 is inwardly recessed relative to the third top corner 10, and the enameled wire 18 does not contact the part outside the second top corner 9 in the first column 3 during winding. The second column 4 is located on the radial inner side of the line connecting the third top corner 10 and the fourth top corner 11, that is, the enameled wire 18 does not contact the part outside the third top corner 10 and the fourth top corner 11 in the second column 4 during winding, thereby realizing point contact between the enameled wire 18 and the crossover structure 16. That is, the third top corner 10 is located at the maximum radial dimension of the entire crossover structure 16, so when the enameled wire 18 extends at the crossover end 2, it will inevitably contact the third top corner 10.

[0036] In summary, when the enameled wire 18 passes through the crossover end 2, it will inevitably contact the third top corner 10 and may contact the second top corner 9 and the fourth top corner 11. Since the second top corner 9 and the fourth top corner 11 are located away from the first surface 7, the distances between the second top corner 9 and the third top corner 10 and between the fourth top corner 11 and the third top corner 10 are moderate and not much different, and the pulling force of the enameled wire 18 between them is also not much different, so the enameled wire 18 can be maximally tightened to prevent displacement and falling off during winding.

[0037] Specifically, the enameled wire 18 has three types of crossover forms between the two stator monomers 1 shown in Figures 3-5 .

[0038] The first type is shown in Figure 3 , which directly passes through the crossover end 2 of the other winding slot after extending from the first crossover slot 14 and entering the second stator monomer 13. At this time, the enameled wire 18 is supported by the second top corner 9 and the third top corner 10 in the crossover structure 16. The enameled wire 18 between the second top corner 9 and the third top corner 10 is subjected to a pulling force, which has an anti-falling effect.

[0039] The second type is shown in Figure 5The shown enameled wire 18 is transferred between the winding slots of the first stator unit 12 and the second stator unit 13 through the first crossover slot 14 and the second crossover slot 15, at this time, the enameled wire 18 is supported by the second top corner 9, the third top corner 10 and the fourth top corner 11 in the crossover structure 16. The enameled wire 18 between the second top corner 9 and the third top corner 10 and between the third top corner 10 and the fourth top corner 11 is subjected to the pulling force, and the pulling force is approximately equal.

[0040] The third is Figure 4 The shown enameled wire 18 is transferred between the winding slots of the first stator unit 12 and the second stator unit 13 through the first crossover slot 14 and the second crossover slot 15, at this time, the enameled wire 18 is supported by the second top corner 9, the third top corner 10 and the fourth top corner 11 in the crossover structure 16. The enameled wire 18 between the second top corner 9 and the third top corner 10 and between the third top corner 10 and the fourth top corner 11 is subjected to the pulling force, and the pulling force is approximately equal.

[0041] In the preferred embodiment, as Figure 6 The difference between the circumferential direction width b of the first post 3 and the circumferential direction width c of the second post 4 is ±0.5mm.

[0042] The first surface 7 can be an arc surface or an irregular multi-segment surface, as long as the first post 3 and the second post 4 do not interfere with each other. For the straight-line stator assembly, before winding, the stator assembly is unfolded into a straight-line state, at this time, the first post 3 and the second post 4 constituting the crossover structure 16 need to be rotated and separated into Figure 2 The shown state, if the first surface 7 is an irregular surface, there may be concave-convex buckling parts when the two first surfaces 7 are spliced, resulting in the inability to rotate and separate. Therefore, the first surface 7 of the embodiment is preferably a plane extending along the radial direction, at this time, the first surface 7 is approximately spliced with the circumferential direction side surfaces of the stator unit 1.

[0043] The crossover structure 16 supports the enameled wire 18 from the inside of the enameled wire 18. In the optional embodiment, the first post 3 and the second post 4 are arranged along the inner edge of the wire passing end 2 of the stator unit 1, which can reduce the total length of the enameled wire 18, and also can make the size of the wire passing end 2 as small as possible, thereby reducing the size of the stator assembly.

[0044] In the preferred embodiment, the axial end surface size of the first post 3 and the second post 4 gradually decreases from one end connected to the stator unit 1 to the end away from the stator unit 1. As Figure 2 The lower end of the first post 3 and the second post 4 is connected to the wire passing end 2 of the stator unit 1, and the upper end surface size of the first post 3 and the second post 4 is smaller than the lower end surface size.

[0045] Embodiment two

[0046] The first top corner 8 in the first column 3 is recessed inside the third top corner 10 of the second column 4, and the recessed distance of the first top corner 8 is not limited, that is, the first top corner 8 can be located radially inside the second top corner 9, at this time, the radial dimension of the first column 3 is smaller, and the transition between the first top corner 8 and the third top corner 10 is too large, so that the enameled wire 18 between the second top corner 9 and the third top corner 10 can be pressed to the surface of the first column 3 by the injection material during subsequent injection molding, and if the space inside the enameled wire 18 is large, the enameled wire 18 can be broken. Therefore, the maximum radial dimension of the first column 3 is set at the first top corner 8, at this time, the recessed distance of the first top corner 8 is small, the first top corner 8 is close to the third top corner 10, and there is a relatively gentle transition slope between the second top corner 9 and the third top corner 10, which can reduce the deformation of the enameled wire 18 between the second top corner 9 and the third top corner 10 during injection molding.

[0047] Embodiment three

[0048] On the basis of the above-mentioned embodiments, under the condition that the number of stator monomers 1 in the stator assembly is certain, the ratio of the circumferential direction width a of the crossover line groove 5 to the circumferential length of the stator monomer 1 is 0.2-0.3.

[0049] The circumferential direction width of the crossover line groove 5 has an influence on the circumferential direction width of the first column 3 and the second column 4, and if the circumferential direction width of the crossover line groove 5 is too narrow, it is not good for passing the line, and if it is too wide, it can cause the first column 3 and the second column 4 to be too narrow, thereby reducing the distance between adjacent transition support points in the crossover line structure 16.

[0050] Embodiment four

[0051] On the basis of the above-mentioned embodiments, the outer edge of the wire passing end 2 of the stator monomer 1 is provided with a wire protection plate 17, and the wire protection plate 17 extends to the radial outside of the first column 3 and the second column 4 in the circumferential direction. The wire protection plate 17 can play a protective role on the enameled wire 18 extending along the wire passing end 2, so as to avoid the enameled wire 18 from being separated from the surface of the stator monomer 1.

[0052] In further design, the difference between the axial height of the first column 3 and the second column 4 and the axial height of the wire protection plate 17 is 3-5 mm. The size difference between the first column 3 and the second column 4 is not large, and the axial height of the wire protection plate 17 is designed to be small in order to prevent the enameled wire 18 from being unable to be hung on the column during winding.

[0053] Embodiment five

[0054] A stator assembly comprises a plurality of stator monomers 1 connected in sequence and the crossover line structure 16 described above.

[0055] In the description of this utility model, it should be understood that the terms "width", "upper", "lower", "left", "right", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0056] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a number" means two or more.

[0057] In this specification, the illustrative expressions of the terms do not necessarily refer to the same embodiments. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments.

[0058] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A crossover structure, characterized by: The first post (3) and the second post (4) located at the wire passing end (2) of the two adjacent stator monomers (1) form a wire crossing groove (5) between the first post (3) and the second post (4) and the wire separating plate (6) on the stator monomer (1) where the first post (3) and the second post (4) are located, the first post (3) and the second post (4) have a first surface (7) arranged opposite to each other and spliced with each other, the first post (3) comprises a first top corner (8) located at the radial outer end of the first surface (7) and a second top corner (9) located at the radial outer end of the side away from the first surface (7), the second post (4) comprises a third top corner (10) located at the radial outer end of the first surface (7) and a fourth top corner (11) located at the radial outer end of the side away from the first surface (7), and chamfers are arranged at the first top corner (8), the second top corner (9), the third top corner (10) and the fourth top corner (11). The radial maximum dimension of the second post (4) is located at the third top corner (10), the first post (3) is located on the radial inner side of the line connecting the second top corner (9) and the third top corner (10), and the second post (4) is located on the radial inner side of the line connecting the third top corner (10) and the fourth top corner (11), and the enamelled wire (18) abuts against at least two of the first top corner (8), the second top corner (9), the third top corner (10) and the fourth top corner (11) during the winding process.

2. The crossovers structure according to claim 1, characterized in that: The first surface (7) is a plane extending in the radial direction.

3. The crossovers structure according to claim 1, characterized in that: The radial maximum dimension of the first post (3) is located at the first top corner (8).

4. The crossovers structure according to claim 1, wherein: The difference between the circumferential direction width b of the first post (3) and the circumferential direction width c of the second post (4) is ±0.5mm.

5. The crossovers structure according to claim 1, wherein: The first post (3) and the second post (4) are arranged along the inner edge of the wire passing end (2) of the stator monomer (1).

6. The crossovers structure according to claim 4, wherein: The axial end surface size of the first post (3) and the second post (4) gradually decreases from one end connected to the stator monomer (1) to the end away from the stator monomer (1).

7. The crossovers structure according to claim 1, wherein: The ratio of the width a of the wire crossing groove (5) in the circumferential direction to the circumferential length of the stator monomer (1) is 0.2-0.

3.

8. The switch structure according to claim 5, wherein: The outer edge of the wire passing end (2) of the stator monomer (1) is provided with a wire protection plate (17) extending to the radial outer side of the first post (3) and the second post (4) in the circumferential direction.

9. The crossovers structure according to claim 8, characterized in that: The difference between the axial height of the first post (3) and the second post (4) and the axial height of the wire protection plate (17) is 3-5mm.

10. A stator assembly characterized by: The wire crossing structure (16) comprises a plurality of stator monomers (1) connected in sequence and the wire crossing structure (16) of any one of claims 1-9.

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