Winding shell, stator winding and motor stator assembly

Abstract

The utility model discloses a winding shell which comprises a stand column, the upper end and the lower end of the stand column are respectively connected with a cover plate, and the area of the cross section of each cover plate is larger than that of the cross section of the stand column. Wherein a through groove is formed in the stand column, and the through groove penetrates through the stand column in the extending direction of the stand column; a containing cavity communicated with the through groove is formed in the cover plate, a notch is further formed in the cover plate, and the notch is communicated with the containing cavity; a flange guide rail and a concave edge guide rail are arranged on the bevel edges of the two sides of the cover plate respectively. Correspondingly, the utility model further discloses a stator winding which comprises a core piece, a conductive winding and the winding shell, the iron core piece is sleeved in the winding shell, and the conductive winding is arranged on the periphery of the stand column of the winding shell in a surrounding mode. According to the utility model, a brand-new winding shell and a stator winding are designed, so that subsequent positioning and assembling are facilitated, and the winding shell and the stator winding have good popularization prospects and application values.

Description

Technical Field

[0001] The utility model relates to the technical field of motors, in particular to a winding shell, a stator winding and a motor stator assembly. Background Art

[0002] In recent years, with the rapid development of new energy vehicles, technical indicators such as motor efficiency and power density have been continuously improved. Among them, the axial flux rotor motor is a special type of permanent magnet synchronous motor. This motor has a unique structure, in which the rotor is located on the side of the stator rather than inside the stator, which enables the rotor to have a larger diameter size, so as to obtain a higher torque output under the action of the same force. Compared with the traditional radial flux motor, the axial flux motor usually has a higher torque density and power density, its structure is more compact, and its weight is lighter, and it has gradually become a new research direction.

[0003] The structure of the double-rotor axial flux motor is usually relatively complex. Its stator is composed of multiple separate stator windings spliced together. A single stator winding needs to wind copper wire into the winding cavity of the iron core, and the copper wire must be insulated from the iron core. Therefore, a plastic winding shell for wrapping the iron core usually needs to be designed.

[0004] Currently, the existing winding shell structure is poorly designed, and its splicing and positioning are relatively difficult. Usually, a tooling is used to position and splice multiple stator windings and place them into a potting tooling to fill resin, so as to obtain an integral stator after the resin is cured. However, it is found in the research that this stator still has the following disadvantages and deficiencies:

[0005] 1. The stator is bonded by resin curing, and its strength is insufficient; 2. The stator is wrapped by resin, and the heat dissipated by the copper wire and the iron core is difficult to dissipate; 3. The positioning accuracy is insufficient, resulting in poor overall accuracy after the stator windings are spliced; 4. The production process is complex, the production cycle is long, and the production efficiency and quality are poor; 5. The stator is sealed and bonded by resin. Once a failure occurs, subsequent maintenance is impossible and resource recovery is difficult. Summary of the Utility Model

[0006] The technical problem to be solved by the utility model is to provide a winding shell, a stator winding and a motor stator assembly to solve the problem that the winding shell structure of the existing stator winding is poor and the subsequent splicing and positioning between the stator windings are difficult.

[0007] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A wire winding shell, which includes a column. The upper and lower ends of the column are respectively connected with cover plates, and the cross-sectional area of the cover plate is larger than that of the column. Among them, a through groove is provided in the column, and the through groove runs through the column along the extending direction of the column; a receiving cavity communicated with the through groove is provided in the cover plate, and a notch is further opened on the cover plate, and the notch is communicated with the receiving cavity; flange guides and concave flange guides are respectively provided on the two inclined sides of the cover plate.

[0008] In the above technical solution of the present utility model, aiming at the problem that the existing wire winding shell has a poor structure and is difficult to splice and position subsequently, the present utility model designs a new wire winding shell. This wire winding shell designs and adopts a column and a cover plate to effectively accommodate the iron core piece by using the through groove in the column to cooperate with the receiving cavity in the cover plate; at the same time, since flange guides and concave flange guides are respectively provided on the two inclined sides of the cover plate, when assembling multiple wire winding shells together subsequently, the inclined sides of two adjacent wire winding shells can achieve concave-convex cooperation by using the flange guides and the concave flange guides, so as to complete the matching splicing. Its splicing method is simple, which can effectively simplify the assembly difficulty, and there is no need to place it in a potting tooling to fill resin subsequently, which is convenient for subsequent disassembly and maintenance.

[0009] Further, in the wire winding shell of the present utility model, the cover plate includes an inner arc edge, an outer side edge, a first inclined side and a second inclined side. One ends of the first inclined side and the second inclined side are respectively connected with the left and right ends of the inner arc edge, and the other ends of the first inclined side and the second inclined side are respectively connected with the left and right ends of the outer side edge; among them, a flange guide is provided on the first inclined side, and a concave flange guide is provided on the second inclined side.

[0010] Further, in the wire winding shell of the present utility model, a wire clamping groove is further opened on the outer side edge of the cover plate.

[0011] Further, in the wire winding shell of the present utility model, the length of the outer side edge is greater than the length of the inner arc edge.

[0012] Further, in the wire winding shell of the present utility model, the size of the notch is smaller than the size of the receiving cavity.

[0013] Further, in the wire winding shell of the present utility model, the cover plate is arranged perpendicular to the extending direction of the column.

[0014] Correspondingly, another object of the present utility model is to design a stator winding, which includes an iron core piece, a conductive winding and the above-mentioned wire winding shell of the present utility model. The iron core piece is sleeved in the wire winding shell, and the conductive winding is wound around the column of the wire winding shell.

[0015] Furthermore, in the stator winding of the present utility model, the iron core member includes a plurality of iron cores, the plurality of iron cores are attached to each other, and each iron core includes an iron column and pole shoes provided at both ends of the iron column; wherein, each pole shoe includes a magnetic flux surface, and the magnetic flux surfaces of the pole shoes of all the iron cores are in the same plane.

[0016] Furthermore, in the stator winding of the present utility model, the conductive winding includes an incoming wire end and an outgoing wire end. The incoming wire end is snapped into a wire slot formed in one end cover plate of the winding housing, and the outgoing wire end is snapped into a wire slot formed in the other end cover plate of the winding housing.

[0017] In addition, another object of the present utility model is to design a motor stator assembly, which includes the stator winding of the present utility model described above. The plurality of stator windings are arranged in a circular ring shape, and the winding housings of adjacent two stator windings are connected to each other.

[0018] The beneficial effects of the present utility model are as follows: A winding housing is designed. The winding housing is designed and adopts upright columns and cover plates with a brand-new structure to effectively accommodate the iron core member by using the through slots in the upright columns to cooperate with the accommodating cavities in the cover plates; at the same time, since flange guides and concave flange guides are respectively provided on the two inclined sides of the cover plate, when assembling a plurality of winding housings together subsequently, the inclined sides of adjacent two winding housings can achieve concave-convex cooperation by using the flange guides and the concave flange guides, so as to complete matching splicing. The splicing means is simple, which can effectively simplify the assembly difficulty and facilitate subsequent disassembly and maintenance.

[0019] It can be seen that the winding housing designed by the present utility model can effectively wrap the iron core according to the structure of the iron core member, so that the subsequent conductive winding is wound on the outer wall surface of the winding housing, thereby realizing the insulation between the iron core member and the wire winding; and, after obtaining the stator winding by using this winding housing, a plurality of stator windings can be directly spliced and positioned without using an external positioning tooling. The installation process is simple, and there is no need to place it in a potting tooling to fill resin subsequently, which can avoid the problem of poor heat dissipation performance of the wire harness and the iron core member caused by resin filling. At the same time, it also simplifies the production process, shortens the production cycle, improves the production efficiency and production quality; and, a plurality of stator windings will not be sealed and bonded by resin subsequently. Once a failure occurs, the operator can effectively disassemble the damaged stator winding and perform repairs to realize resource recycling. It has good promotion prospects and application value.

[0020] Correspondingly, the stator winding and the motor stator assembly of the present utility model also adopt the winding housing of the present utility model described above. It can also use the above-mentioned winding housing to realize the subsequent splicing process, so there is no need for resin sealing. It also has the above-mentioned advantages and beneficial effects, which will not be repeated here. Description of the Drawings

[0021] Figure 1 Schematic structural diagram of the motor stator assembly according to an embodiment of the present utility model;

[0022] Figure 2 Schematic structural diagram of the stator winding according to an embodiment of the present utility model;

[0023] Figure 3 is Figure 2 Schematic A-A sectional view of the stator winding shown;

[0024] Figure 4 is Figure 2 Schematic structural diagram of the iron core member of the stator winding shown;

[0025] Figure 5 is Figure 2 Front view of the iron core member of the stator winding shown;

[0026] Figure 6 is Figure 2 Schematic structural diagram of the winding case of the stator winding shown;

[0027] Figure 7 is Figure 2 Schematic structural diagram when the iron core member is sleeved in the winding case of the stator winding shown.

[0028] Label description:

[0029] 1. Stator winding; 11. Iron core member; 111. Iron column; 112. Pole shoe; 113. Magnetic flux surface; 12. Conductive winding; 121. Incoming wire head; 122. Outgoing wire head; 13. Winding case;

[0030] 2. Cover plate; 21. Accommodation cavity; 22. Notch; 23. Inner arc edge; 24. Outer side edge; 25. First bevel edge; 26. Second bevel edge; 27. Wire clamping groove; 28. Flange guide rail; 29. Concave flange guide rail;

[0031] 3. Column; 31. Through groove. Specific embodiments

[0032] To illustrate in detail the technical content, achieved objectives and effects of the present utility model, the following is described in conjunction with embodiments and with reference to the accompanying drawings.

[0033] Different from the winding case used in the stator winding of traditional dual-rotor axial-flux motors, as Figure 1 shown, the present utility model designs a new motor stator assembly for dual-rotor axial-flux motors. The motor stator assembly is specifically formed by arranging a plurality of stator windings 1 in a circular ring shape, and the winding cases 13 of two adjacent stator windings 1 are connected to each other. Assembly positioning is completed based on the winding case 13 of the stator winding 1, simplifying the production process.

[0034] In the present utility model, the inventor has carried out a brand-new structural optimization on the winding case 13 used in the stator winding 1, so that each stator winding 1 can be directly positioned and spliced, without relying on external positioning tooling and without using the potting resin process, thereby effectively simplifying the production process.

[0035] Please refer to Figures 1 to 7 As shown, the winding case 13 designed in the present utility model can be a plastic part formed by integral injection molding. The winding case 13 includes a column 3, and cover plates 2 are respectively connected to the upper and lower ends of the column 3. The cover plates 2 are arranged perpendicular to the extending direction of the column 3, and the cross-sectional area of the cover plates 2 is larger than the cross-sectional area of the column 3.

[0036] The reason for setting the cross-sectional area of the cover plate 2 larger than that of the column 3 is that when the subsequent wire is wound around the outer wall surface of the column 3, the cover plates 2 at both ends of the column 3 can play a blocking role, so that the wire wound around the outer wall surface of the column 3 will not loosen from both ends of the winding case 13.

[0037] Correspondingly, referring to Figure 6 As shown, in this embodiment, a through groove 31 is provided in the column 3 of the designed winding case 13, and the through groove 31 penetrates the column 3 along the extending direction of the column 3; at the same time, accommodating cavities 21 communicated with the through groove 31 are respectively provided in the cover plates 2 at both ends of the column 3, so as to jointly form a mold cavity for wrapping the iron core part 11 based on the through groove 31 in the column 3 and the accommodating cavities 21 in the cover plates 2 at both ends. Among them, the sizes of the through groove 31 and the accommodating cavity 21 are specifically adjusted adaptively according to the size of the iron core part 11, and the accommodating cavities 21 of the cover plates 2 at both ends of the column 3 can be designed into a symmetrical structure capable of wrapping the pole shoes 112 of the iron core part 11.

[0038] In this embodiment, a notch 22 is further opened on the cover plate 2 of the winding case 13. The notch 22 is used to communicate with the accommodating cavity 21 in the cover plate 2 to ensure that the magnetic flux surface 113 of the subsequent iron core part 11 can be arranged corresponding to the notch 22, so as to ensure the normal operation of the motor stator assembly. Among them, in order to prevent the iron core part 11 from loosening out of the notch 22, in this embodiment, as Figure 7 shown, the size of the notch 22 is specifically set to be smaller than the size of the accommodating cavity 21 of the cover plate 2.

[0039] It should be noted that, as Figure 6 and Figure 7As shown, in this embodiment, the cover plate 2 specifically includes: an inner arc edge 23, an outer side edge 24, a first inclined edge 25, and a second inclined edge 26. One end of the first inclined edge 25 and the second inclined edge 26 are respectively connected to the left and right ends of the inner arc edge 23, and the other ends of the first inclined edge 25 and the second inclined edge 26 are respectively connected to the left and right ends of the outer side edge 24. Among them, a flange guide rail 28 is provided on the first inclined edge 25, and a concave flange guide rail 29 is provided on the second inclined edge 26. Since, when assembling multiple stator windings 1 to prepare Figure 1 the motor stator assembly shown, a single stator winding 1 can be correspondingly spliced into a stator assembly through the semi-cylindrical concave and convex flange guide rails 28 on the inclined edge of the winding case 13.

[0040] Further referring to Figure 7 shown, when setting, the other ends of the first inclined edge 25 and the second inclined edge 26 are respectively connected to the left and right ends of the outer side edge 24 based on the arc edge; and two wire clamping grooves 27 are specifically formed on the outer side edge 24 of the cover plate 2 to use the wire clamping grooves 27 for wire clamping.

[0041] At the same time, in actual application, considering that the motor stator assembly is arranged in a circular ring shape based on multiple stator windings 1, therefore, multiple subsequent winding cases 13 also need to be positioned and assembled into an arc shape with each other; for this reason, the winding case 13 of the present utility model is further optimized to be provided with a cover plate 2 having an inner arc edge 23, and the inner arc edge 23 is closer to the center of the motor stator assembly than the outer side edge 24, and the length of the outer side edge 24 is controlled to be greater than the length of the inner arc edge 23, so that the assembly between multiple subsequent winding cases 13 of the stator windings 1 is simpler, errors will not occur, and the accuracy during subsequent assembly and positioning is improved.

[0042] Thus, based on the above-designed winding case 13, referring to Figure 2 、 Figure 3 、 Figure 4 and Figure 5 shown, in this embodiment, the winding case 13 of the present utility model can be combined with the iron core part 11 and the wire winding to prepare a brand-new stator winding 1, that is, Figure 2 the stator winding 1 shown.

[0043] In this embodiment, the iron core part 11 of the stator winding 1 is sleeved in the winding case 13, and the conductive winding 12 is wound around the column 3 of the winding case 13; among them, the iron core part 11 includes multiple iron cores, the multiple iron cores are attached to each other, and each iron core includes an iron column 111 and pole shoes 112 provided at both ends of the iron column 111; among them, the pole shoes 112 include magnetic flux surfaces 113, and the magnetic flux surfaces 113 of the pole shoes 112 of all the iron cores are in the same plane. When the iron core part 11 is arranged in the above-mentioned winding case 13, the magnetic flux surfaces 113 of the pole shoes 112 of all the iron cores are all arranged facing the notch 22 of the cover plate 2 of the winding case 13.

[0044] It should be noted that in actual application, the above-mentioned multiple iron cores can be prepared from silicon steel sheets of different shapes and specifications, and the multiple iron cores can be riveted together by fitting them to each other. Refer to Figure 7 As shown, in actual application, the iron core column 111 of the above-mentioned iron core can be completely wrapped around the through groove 31 in the column 3 of the winding housing 13, while the pole shoe 112 of the iron core is partially wrapped in the accommodating cavity 21 of the cover plate 2 of the winding housing 13, and the magnetic flux surface 113 of the pole shoe 112 can be arranged in the notch 22 of the cover plate 2.

[0045] In addition, it should be noted that the conductive winding 12 sleeved on the outer peripheral surface of the column 3 of the winding housing 13 further includes an incoming wire head 121 and an outgoing wire head 122. The incoming wire head 121 of the wire winding can be correspondingly clamped into the wire clamping groove 27 opened on one end cover plate 2 of the winding housing 13, and the outgoing wire head 122 can be correspondingly clamped into the wire clamping groove 27 opened on the other end cover plate 2 of the winding housing 13, so as to effectively fix the wire harness and facilitate subsequent wiring.

[0046] Based on the obtained stator winding 1 above, when assembling multiple stator windings 1, the semi-cylindrical flange guide rails 28 and concave flange guide rails 29 that mesh with each other on the winding housing 13 of the stator winding 1 can be used for concave-convex fitting to complete the assembly and positioning of two stator windings 1; among them, as Figure 1 shown, in this embodiment, by sequentially assembling 12 stator windings 1, the required motor stator assembly can be obtained.

[0047] The structural assembly of the above-mentioned motor stator assembly is simple, precise and compact, and does not need to rely on tooling to complete; and multiple stator windings 1 are self-locking and reliable, do not need to be bonded, and the strength is significantly improved, and they can bear large load torques. At the same time, the motor stator assembly is simple and convenient to disassemble, which is convenient for subsequent maintenance, has excellent insulation performance, improved heat dissipation performance, and high mass production feasibility.

[0048] As can be seen from the above, the winding housing 13 designed by the present invention can effectively wrap the iron core according to the structure of the iron core member 11, so that the subsequent conductive winding 12 is wound on the outer wall surface of the winding housing 13, thereby realizing the insulation between the iron core member 11 and the wire winding; and, after obtaining the stator winding 1 by using this winding housing 13, multiple stator windings 1 do not need to use external positioning tooling, and can directly use the flange guide rails 28 and concave flange guide rails 29 on the inclined side of the winding housing 13 for splicing and positioning. The installation process is simple, and there is no need to place it in a potting tooling to fill resin later, which can avoid the problem of poor heat dissipation performance of the wire harness and the iron core member 11 caused by resin filling. At the same time, it also simplifies the production process, shortens the production cycle, improves the production efficiency and production quality, and has good promotion prospects and application value.

[0049] The above are only embodiments of the present utility model, and thus do not limit the patent scope of the present utility model. Any equivalent transformation made by using the content of the specification and drawings of the present utility model, or directly or indirectly applied in related technical fields, shall similarly be included within the patent protection scope of the present utility model.

Claims

1. A winding shell, characterized in that It includes a column, with cover plates respectively connected to the upper and lower ends of the column, and the cross-sectional area of the cover plate is larger than that of the column; wherein, a through groove is provided in the column, and the through groove runs through the column along the extending direction of the column; a receiving cavity communicating with the through groove is provided in the cover plate, and a notch is further formed in the cover plate, and the notch communicates with the receiving cavity; flange guides and concave flange guides are respectively provided on the two slanting sides of the cover plate.

2. The winding case according to claim 1, characterized in that, The cover plate includes an inner arc edge, an outer side edge, a first slanting side and a second slanting side. One ends of the first slanting side and the second slanting side are respectively connected to the left and right ends of the inner arc edge, and the other ends of the first slanting side and the second slanting side are respectively connected to the left and right ends of the outer side edge; wherein, a flange guide is provided on the first slanting side, and a concave flange guide is provided on the second slanting side.

3. The winding case according to claim 2, wherein, A wire clamping groove is further formed in the outer side edge of the cover plate.

4. The winding case according to claim 2, wherein, The length of the outer side edge is greater than that of the inner arc edge.

5. The winding case according to claim 1, characterized in that, The size of the notch is smaller than that of the receiving cavity.

6. The winding housing according to claim 1, wherein The cover plate is arranged perpendicular to the extending direction of the column.

7. A stator winding, characterized in that, It includes an iron core part, a conductive winding and a winding shell as described in any one of claims 1-6. The iron core part is sleeved in the winding shell, and the conductive winding is wound around the column of the winding shell.

8. The stator winding according to claim 7, wherein, The iron core part includes a plurality of iron cores, and the plurality of iron cores are attached to each other. Each iron core includes an iron column and pole shoes provided at both ends of the iron column; wherein, the pole shoes include magnetic flux surfaces, and the magnetic flux surfaces of the pole shoes of all the iron cores are in the same plane.

9. The stator winding according to claim 7, wherein The conductive winding includes an incoming wire head and an outgoing wire head. The incoming wire head is clamped into the wire clamping groove formed in one end cover plate of the winding shell, and the outgoing wire head is clamped into the wire clamping groove formed in the other end cover plate of the winding shell.

10. A motor stator assembly, characterized in that, It includes a stator winding as described in any one of claims 7-9. A plurality of the stator windings are arranged in a circular ring shape, and the winding shells of two adjacent stator windings are connected to each other.

Images