A stator structure of split structure

Abstract

The utility model discloses a kind of stator structures of split structure, it is characterized by: it further includes the winding skeleton of being sleeved on stator tooth;The winding skeleton includes the first locating plate that is attached with the outer circumferential surface of stator shoe part, the second locating plate that is attached with recess and the winding cylinder of being sleeved on stator tooth;The utility model passes the split design of stator core circle and sun flower type iron core unit, both can be separately processed after embedding combination, when winding, it can be realized accurate positioning by the winding slot of winding skeleton, avoid the space restriction when winding of integral structure, substantially improve winding efficiency;The neat structure of winding slot ensures that winding arrangement is neat, reduces turn-to-turn short-circuit risk, improves motor electrical performance;While split structure makes component can be individually replaced, when iron core unit or stator core circle local damage, need not overall scrap, only replace corresponding component can, substantially reduce maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of motor manufacturing technology, specifically to a split-type stator structure. Background Technology

[0002] Among the components of an electric motor, the stator is a crucial part, and its structural rationality directly affects the motor's performance and service life. Traditional stators are mostly integral, made of a single iron core lamination. This structure has space constraints during the winding process, resulting in low winding efficiency. Furthermore, when part of the structure is damaged, the entire stator needs to be replaced, increasing costs.

[0003] Meanwhile, in the existing stator structure, the fitting accuracy between the winding frame and the stator teeth is not high, which can easily lead to loosening or misalignment, affecting the winding quality and the stability of the motor; the heat dissipation performance also needs to be improved, as excessive heat accumulation during long-term motor operation can lead to performance degradation; insufficient fitting accuracy between the stator and rotor can also have an adverse effect on the motor's operating efficiency; therefore, a split-type stator structure is proposed. Summary of the Invention

[0004] The purpose of this invention is to propose a split-type stator structure to solve the above problems.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a split-structure stator comprising a stator core ring formed by stacked laminations, and a sunflower-shaped core unit formed by stacked laminations and embedded within the stator core ring; the core unit includes several radially extending stator teeth and an annular stator shoe portion connecting the roots of the stator teeth into a single unit; the stator core ring and the stator teeth form several tooth grooves after connection; the inner wall of the stator core ring is provided with several protrusions that fit against the stator teeth, and adjacent protrusions... The stator core ring has a recessed portion; its features include a winding skeleton sleeved on the stator teeth; the winding skeleton includes a first positioning plate that fits against the outer circumferential surface of the stator shoe, a second positioning plate that fits against the recessed portion, and a winding cylinder sleeved on the stator teeth; the first positioning plate, the second positioning plate, and the winding cylinder together form a winding groove; the inner wall of the winding cylinder is provided with a plurality of gradually expanding positioning ribs distributed along the radial extension direction of the stator teeth; the outer circumferential surface of the stator core ring is provided with a plurality of arc-shaped grooves, and the bottom of the arc-shaped grooves is provided with heat dissipation grooves.

[0006] Preferably, one end of the second positioning plate extends toward the stator core ring and has a limiting platform that abuts against the end face of the stator core ring.

[0007] Preferably, the other end of the second positioning plate is provided with an elastic locking part that engages with the other end face of the stator core ring.

[0008] Preferably, the second positioning plate has a number of positioning bosses at the top that are connected to the rotor, and a number of positioning grooves on the inner sidewall that are connected to the rotor.

[0009] Preferably, the radial height and circumferential width of the gradually expanding positioning rib increase from the root to the tip of the stator tooth.

[0010] The beneficial effects of this utility model are as follows: The separate design of the stator core ring and the sunflower-shaped core unit allows for individual processing and assembly. During winding, precise positioning is achieved through the winding slots of the winding frame, avoiding the space limitations of an integral structure and significantly improving winding efficiency. The regular structure of the winding slots ensures neat winding arrangement, reducing the risk of inter-turn short circuits and improving the motor's electrical performance. Simultaneously, the separate structure allows for individual component replacement. When a core unit or stator core ring is partially damaged, the entire unit does not need to be scrapped; only the corresponding component needs to be replaced, significantly reducing maintenance costs. The use of arc-shaped slots and heat dissipation slots increases the contact area between the stator core ring and the air, while the bottom heat dissipation slots form air convection channels, accelerating heat dissipation and significantly improving the stator's heat dissipation performance. This effectively controls the motor's operating temperature rise and extends the motor's service life.

[0011] The combination of the limiting platform and the elastic locking part forms a bidirectional axial constraint. The limiting platform abuts against one end face of the stator core ring, and the elastic locking part is locked to the other end face of the stator core ring. The two work together through opposing forces to axially lock the winding frame, core unit and stator core ring, significantly improving the connection stability of the three and effectively preventing axial movement caused by vibration during motor operation. At the same time, this combination design is easy to disassemble and assemble, and facilitates subsequent maintenance.

[0012] The dual constraints of the positioning boss and positioning groove improve the coaxiality of the stator and rotor, reduce air gap fluctuations during rotation, and improve the stability of the motor during operation.

[0013] By setting progressively expanding positioning ribs on the inner wall of the winding drum, a gradient radial constraint structure is formed: its radial height and circumferential width increase along the direction from the root to the tip of the stator teeth, so that the winding drum and the stator teeth form a self-tightening fit; during the assembly process, the positioning ribs and the surface of the stator teeth form a progressive fit from line contact to surface contact, effectively compensating for machining tolerances and eliminating fit clearances; during operation, the radial force generated by the motor vibration will further promote the positioning ribs and stator teeth to mesh tightly, forming a dynamic stable structure, increasing the anti-shaking ability of the winding frame, reducing the risk of winding displacement caused by vibration, and ensuring the long-term reliability of the motor. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2This is an overall top view of the present invention; Figure 3 This is a schematic diagram of the stator core ring structure of this utility model; Figure 4 This is a schematic diagram of the core unit structure of this utility model; Figure 5 This is a schematic diagram of the skeleton structure of this utility model; Figure 6 This is a schematic diagram of the skeleton structure of this utility model from another perspective.

[0015] Legend: 1. Stator core ring; 11. Protrusion; 12. Recess; 13. Arc groove; 14. Heat dissipation groove; 2. Core unit; 21. Stator tooth; 22. Stator shoe; 3. Tooth groove; 4. Winding bobbin; 41. First positioning plate; 42. Second positioning plate; 421. Limiting platform; 422. Elastic snap-fit ​​part; 423. Positioning boss; 424. Positioning groove; 43. Winding cylinder; 431. Gradually expanding positioning rib; 44. Winding groove. Detailed Implementation

[0016] The following description, in conjunction with the accompanying drawings, further illustrates the structure of a split-type stator according to this utility model.

[0017] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0018] See appendix Figure 1-6As shown, this embodiment of a split-structure stator includes a stator core ring 1 formed by stacking several laminations, and a sunflower-shaped core unit 2 formed by stacking several laminations and embedded within the stator core ring 1. The core unit 2 includes several radially extending stator teeth 21 and an annular stator shoe portion 22 connecting the roots of the stator teeth 21 into a single unit. The stator core ring 1, after being connected to the stator teeth 21, forms several tooth grooves 3. The inner wall of the stator core ring 1 is provided with several protrusions 11 that fit against the stator teeth 21, and concave portions 12 are formed between adjacent protrusions 11. The characteristic feature is that it further includes... A winding frame 4 is fitted onto the stator teeth 21; the winding frame 4 includes a first positioning plate 41 that fits against the outer circumferential surface of the stator shoe part 22, a second positioning plate 42 that fits against the recess 12, and a winding cylinder 43 fitted onto the stator teeth 21; the first positioning plate 41, the second positioning plate 42, and the winding cylinder 43 together form a winding groove 44; the inner wall of the winding cylinder 43 is provided with a plurality of gradually expanding positioning ribs 431 distributed along the radial extension direction of the stator teeth 21; the outer circumferential surface of the stator core ring 1 is provided with a plurality of arc-shaped grooves 13, and the bottom of the arc-shaped grooves 13 is provided with heat dissipation grooves 14.

[0019] The stator core ring 1 and core unit 2 are made of silicon steel sheets by stamping and stacking, and the winding frame 4 is made of insulating material. During installation, the winding cylinder 43 of the winding frame 4 is first sleeved on each stator tooth 21, and then the core unit 2 after being sleeved is inserted into the stator core ring 1, with the end of the stator tooth 21 fitting against the protrusion 11 of the stator core ring 1, the outer peripheral surface of the second positioning plate 42 of the winding frame 4 fitting against the concave part 12 of the stator core ring 1, and the outer peripheral surface of the first positioning plate 41 fitting against the outer peripheral surface of the stator shoe part 22 of the core unit 2, thereby axially fixing the core unit 2 and the winding frame 4 inside the stator core ring 1.

[0020] By adopting a separate design for the stator core ring 1 and the sunflower-shaped core unit 2, the two can be processed separately and then assembled. During winding, precise positioning can be achieved through the winding groove 44 of the winding frame 4, avoiding the space limitations of the integral structure winding and greatly improving winding efficiency. The regular structure of the winding groove 44 ensures that the windings are neatly arranged, reducing the risk of inter-turn short circuits and improving the electrical performance of the motor. At the same time, the separate structure allows for individual replacement of components. When the core unit 2 or the stator core ring 1 is partially damaged, it is not necessary to scrap the whole unit; only the corresponding component needs to be replaced, which greatly reduces maintenance costs. Through the setting of the arc-shaped groove 13 and the heat dissipation groove 14, the arc-shaped groove 13 can increase the contact area between the stator core ring 1 and the air, and the heat dissipation groove 14 at the bottom forms an air convection channel, accelerating heat dissipation, significantly improving the heat dissipation performance of the stator, effectively controlling the motor's operating temperature rise, and extending the motor's service life.

[0021] In one embodiment, one end of the second positioning plate 42 extends toward the stator core ring 1 and has a limiting platform 421 that abuts against the end face of the stator core ring 1; the other end of the second positioning plate 42 is provided with an elastic locking part 422 that engages with the other end face of the stator core ring 1; the contact surface between the limiting platform 421 and the stator core ring 1 is a planar structure, and the elastic locking part 422 is hook-shaped and has a locking inclined surface facing the end face of the stator core ring 1; after the core unit 2 of the winding frame 4 is installed, when it is inserted into the stator core ring 1, it is inserted along the protrusion 11 and the concave part 12. When the end of one end of the stator core ring 1 abuts against the limiting platform 421, the elastic locking part 422 passes through the stator core ring 1 and engages with the other end face of the stator core ring 1, thereby axially fixing the stator core ring 1, the core unit 2, and the winding frame 4.

[0022] The combination of the limiting platform 421 and the elastic locking part 422 forms a bidirectional axial constraint. The limiting platform 421 abuts against one end face of the stator core ring 1, and the elastic locking part 422 is locked to the other end face of the stator core ring 1. The two work together through opposing forces to axially lock the winding frame 4, the core unit 2 and the stator core ring 1, significantly improving the connection stability of the three and effectively preventing axial movement caused by vibration during motor operation. At the same time, this combination design is easy to disassemble and assemble, and facilitates subsequent maintenance.

[0023] In one embodiment, the top of the second positioning plate 42 is provided with a plurality of positioning bosses 423 connected to the rotor, and the inner sidewall is provided with a plurality of positioning grooves 424 connected to the rotor. When the stator and rotor are installed, the positioning bosses 423 on the winding frame 4 are inserted into the rotor, and the protruding part of the rotor is inserted into the positioning grooves 424 of the winding frame 4. Through the dual constraint of the positioning bosses 423 and the positioning grooves 424, the coaxiality of the stator and rotor is improved, the air gap fluctuation during rotation is reduced, and the stability of the motor during operation is improved.

[0024] In one embodiment, the radial height and circumferential width of the gradually expanding positioning rib 431 increase from the root to the tip of the stator tooth 21; the winding bobbin 4 becomes tighter as it is inserted towards the root of the stator tooth 21; the gradual expansion positioning rib 431 on the inner wall of the winding drum 43 forms a gradient radial constraint structure: its radial height and circumferential width increase from the root to the tip of the stator tooth 21, so that the winding drum 43 and the stator tooth 21 form a self-tightening fit; during assembly, the gradually expanding positioning rib 431 and the surface of the stator tooth 21 form a progressive fit from line contact to surface contact, effectively compensating for machining tolerances and eliminating fit gaps; during operation, the radial force generated by motor vibration will further promote the tight engagement of the positioning rib 431 and the stator tooth 21, forming a dynamic stable structure, increasing the anti-shaking ability of the winding bobbin 4, reducing the risk of winding displacement caused by vibration, and ensuring the long-term reliability of the motor.

[0025] In the process of using this utility model, firstly, the winding bobbin 4 is fitted onto the stator teeth 21, so that the outer peripheral surface of the first positioning plate 41 is in contact with the outer peripheral surface of the stator shoe part 22, while ensuring that the gradually expanding positioning rib 431 is in close contact with the stator teeth 21; then, the iron core unit 2 with the winding bobbin 4 installed is inserted into the stator iron core ring 1; during insertion, the tooth tip surface of the stator teeth 21 of the iron core unit 2 is aligned with the protrusion 11 of the stator iron core ring 1, and the second positioning rib of the winding bobbin 4 is aligned with the protrusion 11 of the stator iron core ring 1. The outer peripheral surface of the positioning plate 42 is aligned with the recess 12 of the stator core ring 1. At the same time, the elastic locking part 422 elastically contracts along the locking slope into the recess 12 of the stator core ring 1, inserting until the limiting platform 421 on the winding frame 4 abuts against the end face of one end of the stator core ring 1. At this time, the elastic locking part 422 passes through the stator core ring 1 and locks against the other end face of the stator core ring 1, thus axially fixing the stator core ring 1 with the core unit 2 and the winding frame 4.

[0026] When the stator and rotor are installed, the positioning boss 423 on the winding frame 4 is inserted into the rotor, and the protruding part of the rotor is inserted into the positioning groove 424 of the winding frame 4. Through the double constraint of the positioning boss 423 and the positioning groove 424, it is tightly connected to the rotor.

[0027] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A split-type stator structure, comprising a stator core ring (1) formed by stacking several laminations, and a sunflower-shaped core unit (2) formed by stacking several laminations and embedded in the stator core ring (1); the core unit (2) includes several radially extending stator teeth (21) and an annular stator shoe portion (22) connecting the roots of the stator teeth (21) into one piece; the stator core ring (1) and the stator teeth (21) are connected to form several tooth grooves (3); the inner wall of the stator core ring (1) is provided with several protrusions (11) that fit with the stator teeth (21), and a recess (12) is formed between adjacent protrusions (11); characterized in that: It also includes a winding skeleton (4) sleeved on the stator teeth (21); the winding skeleton (4) includes a first positioning plate (41) that fits against the outer circumferential surface of the stator shoe (22), a second positioning plate (42) that fits against the recess (12), and a winding cylinder (43) sleeved on the stator teeth (21); the first positioning plate (41), the second positioning plate (42) and the winding cylinder (43) together form a winding groove (44); the inner wall of the winding cylinder (43) is provided with a number of gradually expanding positioning ribs (431) distributed along the radial extension direction of the stator teeth (21); the outer circumferential surface of the stator core ring (1) is provided with a number of arc-shaped grooves (13), and the bottom of the arc-shaped grooves (13) is provided with heat dissipation grooves (14).

2. The stator structure with a split design according to claim 1, characterized in that: The second positioning plate (42) has a limiting platform (421) extending towards the stator core ring (1) at one end, which abuts against the end face of the stator core ring (1).

3. The stator structure with a split design according to claim 2, characterized in that: The second positioning plate (42) is provided with an elastic snap-fit ​​part (422) on the other end, which snaps into the other end face of the stator core ring (1).

4. The stator structure with a split design according to claim 3, characterized in that: The second positioning plate (42) has several positioning bosses (423) connected to the rotor at its top and several positioning grooves (424) connected to the rotor on its inner sidewall.

5. The stator structure with a split design according to claim 1, characterized in that: The radial height and circumferential width of the gradually expanding positioning rib (431) increase from the root to the tip of the stator tooth (21).

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