High-efficiency sectional type inner winding stator structure

Abstract

The utility model discloses a high-efficiency sectional type inner winding stator structure, which comprises an annular iron core formed by splicing a plurality of stator core blocks, each stator core block comprises an arc-shaped yoke and three tooth columns arranged at the inner arc edge of the arc-shaped yoke at intervals, and the tooth columns are strip bodies with the same width. The opening width of the tooth groove between every two adjacent tooth columns is larger than the width of the tooth columns. The stator core block is reasonable in structural design, the tooth columns are strip bodies with the equal width, and the width of the tooth groove opening is larger than that of the tooth columns, so that the problem that a large space is occupied by independent arrangement of silicon steel sheets when the stator core block is manufactured due to insufficient tooth groove width of a traditional split type module is effectively solved. When the silicon steel sheets are blanked and arranged, the tooth columns on the stator core blocks can be embedded into tooth groove gaps on other stator core blocks to be arranged in a staggered mode, the material utilization rate is remarkably improved, waste of excess materials is reduced, meanwhile, the requirement for the mold size is reduced, and the production cost is greatly reduced. And the whole structure is simple, splicing and winding are easy, and the winding efficiency and the slot fullness rate are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a high-efficiency segmented internal winding stator structure used in motors. Background Technology

[0002] Traditional motor stators are mostly integral circular ring structures with several winding posts inside the stator core. Wires are wound around the winding posts to form stator windings. When manufacturing motor stators, specialized winding equipment needs to be inserted into the stator core to pull the wires individually around the stator windings. This process is complex, has low production efficiency, and results in a low slot fill factor.

[0003] Traditional motor stators typically employ an integral, ring-shaped structure design, with several evenly distributed toothed columns inside the stator core. Wires are then wound one by one around these columns to form the stator winding. However, this manufacturing process has significant drawbacks: firstly, the winding equipment needs to penetrate deep into the stator core for wire traction and winding, resulting in limited operating space, increased process complexity, and difficulty in meeting the demands of automated production, leading to low overall production efficiency; secondly, due to the toothed column arrangement, the wire filling density within the slots is insufficient, resulting in a low slot fill factor, directly impacting the motor's power density and energy efficiency.

[0004] To address the aforementioned shortcomings, utility model patent CN214101147U proposed a split-type casting stator assembly structure. This design disassembles the stator core into multiple core assembly modules formed by stacking laminations. These modules are interlocked end-to-end to form a cylindrical stator core, with each module pre-installed with stator windings. This modular design reduces the stator casting space and facilitates winding installation. However, actual production revealed that because the groove width of the core assembly modules is smaller than the tooth column width, the teeth of each module cannot be inserted into the groove gaps of adjacent modules for staggered arrangement during silicon steel sheet punching and layout. This results in the silicon steel sheets being laid flat as independent units. This arrangement not only leads to low material utilization and significant waste of excess material but also forces the mold design to adapt to the complete contour of a single module, significantly increasing mold volume and processing costs, resulting in excessively high production costs. Utility Model Content

[0005] To address the aforementioned shortcomings, the purpose of this utility model is to provide a highly efficient segmented internal winding stator structure with a reasonable structural design, staggered arrangement, and cost savings.

[0006] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0007] A high-efficiency segmented internal winding stator structure includes an annular iron core formed by assembling several stator core blocks. Each stator core block includes an arc-shaped yoke and three toothed columns arranged at intervals on the inner arc edge of the arc-shaped yoke. The toothed columns are strips of equal width, and the width of the tooth groove opening between two adjacent toothed columns is wider than the width of the toothed column.

[0008] As a preferred embodiment of this utility model, the two ends of the arc-shaped yoke are provided with splicing structures, which facilitates precise positioning and rapid assembly.

[0009] As a preferred embodiment of this utility model, the splicing structure includes a semi-circular protrusion and a semi-circular groove that matches the semi-circular protrusion, so as to realize the self-alignment of the splicing between each stator core block, ensure the roundness of the stator core after assembly, and achieve good assembly effect.

[0010] As a preferred embodiment of this utility model, the width of the tooth groove opening between two adjacent tooth pillars is 1.1 to 1.3 times the width of the tooth pillar, and the interior of the tooth groove gradually widens, effectively ensuring the feasibility of staggered arrangement and avoiding interference.

[0011] As a preferred embodiment of this utility model, a V-shaped notch is provided on the inner wall of the tooth groove opening between two adjacent tooth columns, which is beneficial for positioning and fixing the groove wedge.

[0012] As a preferred embodiment of this utility model, a positioning slot is provided at the middle position of the outer arc edge of the arc-shaped yoke, which facilitates quick positioning and fixing during the assembly of the stator core, thereby improving the accuracy and efficiency of assembly.

[0013] As a preferred embodiment of this utility model, a riveting position is provided at the connection position between the arc-shaped yoke and the toothed column, and a riveting position is provided at the end of the toothed column, so that the connection between the laminates is more secure.

[0014] As a preferred embodiment of this utility model, the arc-shaped yoke and the toothed column are integrally connected, which reduces joints and assembly errors, ensures a firm connection, and improves the integrity and stability of the stator structure.

[0015] The beneficial effects of this utility model are as follows: The structure of this utility model is rationally designed. Because the toothed column is a strip of equal width, the opening width of the tooth groove is greater than the width of the toothed column, effectively solving the problem of insufficient tooth groove width in traditional split-module stator core blocks, which results in excessive space occupied by the independent arrangement of silicon steel sheets during manufacturing. During the punching and layout of the silicon steel sheets, the toothed columns on the stator core block can be embedded into the gaps in the tooth grooves of other stator core blocks for staggered arrangement, significantly improving material utilization, reducing waste, and simultaneously reducing mold size requirements, thus greatly lowering production costs. Furthermore, the overall structure is simple, easy to assemble and wind, effectively improving winding efficiency and slot fill rate.

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the stator core block in this utility model.

[0019] Figure 3 This is a schematic diagram of the die-cutting and layout structure of this utility model. Detailed Implementation

[0020] See the example. Figure 1 and Figure 2 This embodiment provides a high-efficiency segmented internal winding stator structure, which includes an annular iron core formed by assembling several stator core blocks 1. Each stator core block 1 includes an arc-shaped yoke 11 and three toothed columns 12 arranged at intervals on the inner arc edge of the arc-shaped yoke 11. The arc-shaped yoke 11 and the toothed columns 12 are integrally connected, which reduces joints and assembly errors, makes the connection firm, and improves the integrity and stability of the stator structure.

[0021] The toothed column 12 is a strip of uniform width, and the width D of the tooth groove opening between two adjacent toothed columns 12 is wider than the width of the toothed column 12. Preferably, the width D of the tooth groove opening between two adjacent toothed columns 12 is 1.1 to 1.3 times the width d of the toothed column 12, and the interior of the tooth groove gradually widens, effectively ensuring the feasibility of staggered arrangement and avoiding interference.

[0022] Preferably, splicing structures are provided at both ends of the arc-shaped yoke 11 to facilitate precise positioning and rapid assembly. In this embodiment, the splicing structure includes a semi-circular protrusion 13 and a semi-circular groove 14 that matches the semi-circular protrusion 13, realizing self-alignment between the stator core blocks 1, ensuring the roundness of the stator core after assembly, and achieving good assembly results. In other embodiments, the semi-circular protrusion 13 and the semi-circular groove 14 can also adopt other shapes, such as square or trapezoidal. Preferably, an insertion rod extending along the arc direction of the arc-shaped yoke 11 is also provided at the middle position of the semi-circular protrusion 13, and an insertion cavity for inserting the insertion rod is provided at the middle position of the semi-circular groove 14. The internal contour of the insertion cavity is an isocavity trapezoid with an opening at the top for inserting the insertion rod. The cooperation between the insertion rod and the insertion cavity further improves the assembly effect.

[0023] A V-shaped notch is provided on the inner wall of the slot opening between two adjacent toothed columns 12 to facilitate the positioning and fixing of the slot wedge. A positioning slot 15 is provided at the middle position of the outer arc edge of the arc-shaped yoke 11 to facilitate quick positioning and fixing during the assembly of the stator core, improving the accuracy and efficiency of assembly. A riveting position 16 is provided at the connection position of the arc-shaped yoke 11 and the toothed column 12, and a riveting position 16 is provided at the end of the toothed column 12 to make the connection between the laminations more secure. Preferably, a winding post can be provided on the stator core block 1, specifically, an assembly hole is provided on the stator core block 1, and one end of the winding post is fixed to the assembly hole by thread or interference fit. In this way, the lead copper wire of the coil winding on the toothed column 12 can be wound around the winding post for positioning and extended out along the winding post to facilitate subsequent assembly and wire bonding processes. A threaded groove can also be provided on the winding post to further facilitate the winding of the lead copper wire of the coil winding and prevent displacement and loosening.

[0024] When punching and laying out the pattern on sheet 2, see Figure 3 Since the tooth column 12 is a strip of equal width, the tooth groove opening width D is greater than the tooth column 12 width d. The tooth column 12 on one stator core block 1 can be embedded in the tooth groove gap on another stator core block 1 for staggered arrangement. This can effectively improve material utilization, reduce waste of surplus material, reduce mold size requirements, and thus reduce production costs.

[0025] Based on the disclosure and teachings of the above specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, this utility model is not limited to the specific embodiments disclosed and described above, and some modifications and changes to this utility model should also fall within the protection scope of the claims of this utility model. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on this utility model. Other core structures obtained using the same or similar structures as described in the above embodiments of this utility model are all within the protection scope of this utility model.

Claims

1. A high efficiency segmented inner-wound stator structure comprising a ring-shaped core formed by assembling a plurality of stator core blocks, characterized in that, The stator core includes an arc-shaped yoke and three toothed columns arranged at intervals along the inner arc edge of the arc-shaped yoke. The toothed columns are strips of equal width, and the width of the tooth groove opening between two adjacent toothed columns is wider than the width of the toothed column.

2. The high efficiency segmented inner-wound pole structure of claim 1, wherein: The two ends of the arc-shaped yoke are provided with splicing structures.

3. The high efficiency segmented inner-wound pole structure of claim 2, wherein: The splicing structure includes a semi-circular protrusion and a semi-circular groove that matches the semi-circular protrusion.

4. The high-efficiency segmented internal winding stator structure according to claim 1, characterized in that: The width of the tooth groove opening between two adjacent tooth pillars is 1.1 to 1.3 times the width of the tooth pillar, and the inside of the tooth groove gradually widens.

5. The high efficiency segmented inner-wound pole structure of claim 4, wherein: A V-shaped cut is provided on the inner wall of the tooth groove opening between two adjacent tooth pillars.

6. The high efficiency segmented inner-wound pole structure of any one of claims 1-5, wherein: A positioning slot is provided at the middle position of the outer arc edge of the arc-shaped yoke.

7. The high efficiency segmented inner-wound pole structure of claim 1, wherein: The arc-shaped yoke and the toothed column are provided with a riveting position at the connection point, and the toothed column is provided with a riveting position at its end.

8. The high efficiency segmented inner-wound pole structure of claim 1, wherein: The arc-shaped yoke and the toothed column are integrally connected structures.

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