Motor injection molding stator structure

Abstract

The utility model discloses a motor injection molding stator structure, which comprises four groups of stator cores, the four groups of stator cores are symmetrically arranged about the center of a circle and are coated with injection molding parts through injection molding, and each stator core comprises a yoke part, a tooth part and a pole shoe part. According to the utility model, the structural design is reasonable, an injection molding structure is adopted, so that all the stator cores are embedded in the injection molding part, the integrated molding of the stator cores and the injection molding part is realized, the problems that the coating thickness of a traditional insulation layer is not uniform and the insulation layer is easy to crack and fall off are solved, the assembly process is simplified, and the assembly precision is improved; meanwhile, in the winding process, the coil can be accurately wound on the tooth portion under the limiting of the outer blocking piece and the inner blocking piece, in the assembling process, the coil and the motor cover can be conveniently and fixedly assembled through the pin hole in the positioning boss, in addition, a lead-out copper wire of the coil winding can be wound on the winding column to be positioned and can extend and be led out along the winding column, and therefore the winding effect is improved. And subsequent assembling and wire welding procedures are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor technical field, concretely relates to a motor injection molding stator structure applied in motor. BACKGROUND

[0002] The stator core is composed of a plurality of core pieces, and an insulation structure is arranged at both ends of the core for insulation. The traditional insulation structure is coated with an insulation layer, but the insulation layer is not uniform in thickness and is prone to cracking and falling off. Moreover, the process of coating the stator is complex, and the outer diameter of the stator after coating needs to be machined to ensure concentricity.

[0003] Therefore, some insulation structures of the stator core adopt the method of buckling an insulation cover at both ends of the core, but the insulation cover cannot tightly wrap all the cores, and the winding displacement is prone to occur during the winding process, resulting in a high scrap rate. At the same time, the stator core and the motor cover also lack a limiting fixing structure, which is prone to displacement. In addition, the coil winding copper wire needs to be led out of the stator, and how to reliably lead out the coil winding copper wire is also a problem that needs to be solved for the stator core at present. SUMMARY

[0004] In view of the above problems, the utility model aims to provide a motor injection molding stator structure with a reasonable structure design and capable of tightly wrapping the stator core.

[0005] To achieve the above-mentioned purpose, the utility model provides the technical scheme as follows:

[0006] A motor injection molding stator structure includes a stator core, four groups of stator cores are arranged in a circle center symmetrically and are covered with an injection molding piece by injection molding, the stator core includes a yoke part, a tooth part and a pole shoe part, a rotor cavity is arranged at the center position of the injection molding piece, outer and inner blocking pieces are arranged at the positions corresponding to the yoke part and the pole shoe part at the two end faces of the injection molding piece, a positioning boss and a winding column are arranged at one end of the injection molding piece, and a pin hole is arranged on the positioning boss.

[0007] As a preferred scheme of the utility model, an outer opening is arranged on the outer surface of the injection molding piece to expose the outer surface of the yoke part, which increases the contact area between the stator core and the external environment, is conducive to heat dissipation, and also reduces the material and the volume.

[0008] As a preferred scheme of the utility model, an inclined surface is arranged at the edge of the outer opening, which helps to guide the airflow and further improves the heat dissipation efficiency.

[0009] As a preferred scheme of the utility model, the outer surface middle position of the yoke part is equipped with a limiting groove, and the outer surface of the injection molding part is equipped with a through groove opposite to the limiting groove. The limiting groove helps to adjust the position of the stator core in the injection molding part, ensures the concentricity, and facilitates the subsequent overall positioning and installation.

[0010] As a preferred scheme of the utility model, the inner wall of the rotor cavity is equipped with an inner opening for exposing the bottom surface of the pole shoe part, which is beneficial to the transmission of electromagnetic energy.

[0011] As a preferred scheme of the utility model, the tooth part is equipped with a riveting interface, so that the lamination of the core pieces is more closely matched through the riveting process, and the lamination is prevented from being loose.

[0012] As a preferred scheme of the utility model, the lower part of the two ends of the pole shoe part is relatively narrow, and the upper part is gradually widened, so that the positioning and matching effect with the injection molding part is better, and the pole shoe part can be more firmly fixed in the injection molding part.

[0013] As a preferred scheme of the utility model, the width size of the yoke part is smaller than the width size of the pole shoe part, so that the material consumption of the core pieces is reduced, and the cost is lowered.

[0014] As a preferred scheme of the utility model, the injection molding part includes a square main body part and branch parts respectively arranged on four side surfaces of the square main body part, and the overall structure is compact, small in size and light in weight.

[0015] The utility model discloses the beneficial effect is: the utility model discloses the structure design is reasonable, adopts the injection molding type structure, namely the four groups of stator core are placed in the mould in advance, then the corresponding injection molding part is formed through injection molding, makes all stator core inlay embeds in the injection molding part, realizes the integration of stator core and injection molding part's forming, not only solves the problem of traditional insulation layer coating uneven, easy to crack and fall off, also simplifies the assembly process, improves the assembly accuracy. Meanwhile, the design of injection molding part makes the stator core can be tightly wrapped, avoids the problem that the insulation cover can not tightly wrap all the core, reduces the scrap rate;When winding, the coil can be accurately wound on the tooth part through the limiting of the outer baffle and the inner baffle, when assembling, the pin hole on the positioning boss can be conveniently fixed and assembled with the motor cover, in addition, the outgoing copper wire of the coil winding can be wound on the winding column for positioning, and extends along the winding column, which is convenient for subsequent assembly and welding process.

[0016] The utility model is further illustrated below in connection with the drawings and examples. DRAWINGS

[0017] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0018] Figure 2 is a schematic diagram of the exploded structure of the utility model.

[0019] Figure 3 is a schematic diagram of the cross section structure of the utility model.

[0020] Figure 4 is a schematic diagram of the cross section structure of the injection molding part in the utility model. DETAILED DESCRIPTION

[0021] Embodiment, see Figure 1 , Figure 2 , Figure 3 and Figure 4 The motor injection molding stator structure provided by the embodiment comprises a stator core 1, four groups of stator cores 1 are arranged in a circle center symmetry, and are covered with an injection molding part 2 through injection molding.

[0022] The stator core 1 comprises a yoke part 11, a tooth part 12 and a pole shoe part 13, a riveting interface 121 is arranged on the tooth part 12, the core sheet laminated cooperation is made more closely through the riveting process, and the lamination is avoided to be loose. The pole shoe part 13 is relatively narrow at the lower part of both ends, and is gradually widened at the upper part, and the V-shaped positioning and cooperation effect with the injection molding part 2 is better, and the pole shoe part 13 can be more firmly fixed in the injection molding part 2. The width size of the yoke part 11 is preferably smaller than the width size of the pole shoe part 13, the material consumption of the core sheet is reduced, and the cost is reduced.

[0023] The injection molding part 2 comprises a square main body part and branch parts arranged on four side faces of the square main body part respectively, and the overall structure is compact, small in size and light in weight. A rotor cavity 21 is arranged at the center position of the injection molding part 2, outer and inner blocking sheets 22 and 23 are arranged at positions corresponding to the yoke part 11 and the pole shoe part 13 on the two end faces of the injection molding part 2, a positioning boss 24 and a winding column 25 are arranged at one end of the injection molding part 2, and a pin hole 241 is arranged on the positioning boss 24. Preferably, a threaded groove can be arranged on the winding column 25, which is more conducive to the winding of the outgoing copper wire of the coil winding and is not easy to displace and loosen.

[0024] An outer opening 26 is arranged on the outer surface of the injection molding part 2, so that the outer surface of the yoke part 11 is exposed, the contact area of the stator core 1 with the external environment is increased, heat dissipation is facilitated, and meanwhile, the material consumption is reduced and the volume is reduced. Preferably, an inclined surface is arranged at the edge of the outer opening 26, the inclined surface helps to guide airflow, and the heat dissipation efficiency is further improved. An inner opening 27 is arranged on the inner wall of the rotor cavity 21, so that the bottom surface of the pole shoe part 13 is exposed, and the transmission of electromagnetic energy is facilitated.

[0025] The limiting slot 111 is arranged in the middle position of the outer surface of the yoke part 11, and the through slot 221 is arranged on the outer surface of the injection molding part 2 and is opposite to the limiting slot 111. The limiting slot 111 helps to adjust the position of the stator core 1 in the injection molding part 2, ensures the concentricity, and also facilitates the subsequent positioning and installation.

[0026] During production, the four groups of stator cores 1 are placed in the mold in advance, and then the injection molding part 2 is correspondingly formed through the injection molding process, so that all the stator cores 1 are embedded in the injection molding part 2, realizing the integrated molding of the stator core 1 and the injection molding part 2. Not only the problem of uneven thickness and easy cracking and falling of the traditional insulation layer is solved, but also the assembly process is simplified and the assembly precision is improved. At the same time, the design of the injection molding part 2 enables the stator core 1 to be tightly wrapped, avoiding the problem that the insulation cover cannot tightly wrap all the cores, and reducing the scrap rate.

[0027] During winding, the limiting of the outer blocking piece 22 and the inner blocking piece 23 enables the coil to be accurately wound on the tooth part 12 and not easy to shift and loosen. The outgoing copper wire of the coil winding can be wound on the winding column 25 for positioning and extending in the axial direction along the winding column 25

[0028] During assembly, the plug-in hole is arranged on the motor cover and matched with the pin hole 241, and the opening is arranged to enable the winding column 25 to extend out. The plug-in hole on the motor cover is matched with the pin hole 241 and inserted, and the outgoing copper wire wound on the winding column 25 is passed through the opening and led out, facilitating the subsequent wiring and soldering process.

[0029] According to the disclosure and teaching of the above description, the skilled in the art of the utility model can also change and modify the above embodiments. Therefore, the utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes of the utility model should also fall within the protection scope of the claims of the utility model. In addition, although some specific terms are used in the specification, these terms are only for convenience of description and do not constitute any limitation on the utility model. As described in the above embodiments of the utility model, other cores obtained by using the same or similar structure are also within the protection scope of the utility model.

Claims

1. An injection molded stator structure for an electric machine comprising a stator core, characterized in that, Four groups of stator cores are arranged in a circle and are covered by injection molding parts, the stator cores include yoke parts, tooth parts and pole shoe parts, the center of the injection molding parts is provided with a rotor cavity, the two end faces of the injection molding parts are provided with outer and inner blocking pieces corresponding to the positions of the yoke parts and the pole shoe parts, one end of the injection molding parts is provided with a positioning boss and a winding column, and the positioning boss is provided with a pin hole.

2. The motor injection molded stator structure of claim 1, wherein: An outer opening is arranged on the outer surface of the injection molding part to expose the outer surface of the yoke part.

3. The motor injection molded stator structure of claim 2, wherein: The edge of the outer opening is provided with an inclined surface.

4. The motor injection molded stator structure of claim 1, wherein: A limiting groove is arranged at the middle position of the outer surface of the yoke part, and a through groove is arranged on the outer surface of the injection molding part and is opposite to the limiting groove.

5. The motor injection molded stator structure of claim 1, wherein: An inner opening is arranged on the inner wall of the rotor cavity to expose the bottom surface of the pole shoe part.

6. The motor injection molded stator structure of claim 1, wherein: A riveting interface is arranged on the tooth part.

7. The motor injection molded stator structure of claim 1, wherein: The lower part of the two ends of the pole shoe part is narrow, and the upper part is gradually widened.

8. The motor injection molded stator structure of claim 1, wherein: The width of the yoke part is smaller than the width of the pole shoe part.

9. The motor injection molded stator structure of any of claims 1-8, wherein: The injection molding part includes a square main body part and branch parts arranged on the four sides of the square main body part respectively.

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