Stator assembly and external rotor motor using the same

Abstract

The utility model discloses a kind of stator assembly and the outer rotor motor applied thereto, including stator core, end insulation and coil winding, end insulation is respectively installed in the upper and lower ends of stator core after winding coil winding, stator core includes yoke and the tooth portion of the outer side of yoke portion, form embedded wire slot between adjacent two tooth portions, insulation paper is installed in embedded wire slot, end insulation includes with yoke portion correspondingly set insulation yoke portion and with each tooth portion correspondingly set insulation tooth portion, form wire slot between adjacent two insulation tooth portions, insulation paper extends to wire slot, the outer end of each insulation tooth portion Two sides are provided with inverted hook and form U shape, the both ends of insulation paper are clamped in inverted hook, displacement of insulation paper occurs when winding is effectively prevented by inverted hook, to avoid that enameled wire is wound to the outside of slot paper and contact with stator core and appear poor voltage resistance.

Description

Technical Field

[0001] This utility model relates to an external rotor motor with a stator assembly and its application. Background Technology

[0002] The existing stator assembly includes a stator core, end insulation, and coil windings. The end insulation is installed at both ends of the stator core before the coil windings are wound. The stator core includes a yoke and several teeth protruding from the outer surface of the yoke. A slot is formed between two adjacent teeth, and insulating paper is installed in the slot. The end insulation includes an insulating yoke corresponding to the yoke and insulating teeth corresponding to each tooth. A pass-through slot is formed between two adjacent insulating teeth, and the insulating paper extends into the pass-through slot. The outer circular end of the end insulation is square and does not limit the slot paper. During the winding process, the slot paper may shift, causing the enameled wire to wind outside the slot paper and contact the core, resulting in poor withstand voltage. Summary of the Invention

[0003] The purpose of this invention is to provide a stator assembly and its application in an external rotor motor, solving the technical problem in the prior art where the outer circular end of the end insulation is square, and there is no restraint on the slot paper. This causes the slot paper to shift during winding, resulting in the enameled wire winding outside the slot paper and contacting the iron core, leading to poor voltage withstand.

[0004] The technical solution of this utility model is implemented as follows:

[0005] This utility model provides a stator assembly, including a stator core, end insulation, and coil windings. The end insulation is installed at both ends of the stator core before the coil windings are wound. The stator core includes a yoke and several teeth protruding from the outer side of the yoke. A wire-inserting groove is formed between two adjacent teeth, and insulating paper is installed in the wire-inserting groove. The end insulation includes an insulating yoke corresponding to the yoke and insulating teeth corresponding to each tooth. A wire-passing groove is formed between two adjacent insulating teeth, and the insulating paper extends into the wire-passing groove. Each insulating tooth has barbs on both sides of its outer end, forming a U-shape. The two ends of the insulating paper are locked in the barbs to prevent the insulating paper from shifting during winding.

[0006] The end face of the aforementioned insulating tooth is provided with raised ribs.

[0007] The insulating yoke described above has several axially protruding pillars at its bottom, and the end face of the stator core is provided with positioning holes corresponding to the pillars, with the pillars nested inside the positioning holes.

[0008] The aforementioned barbs located at the two adjacent insulating teeth are fitted with cover plates.

[0009] The insulating teeth described above have L-shaped barbs on both sides in the middle. The L-shaped barbs are fastened to the ends of the insulating paper to prevent the insulating paper from moving axially.

[0010] An external rotor motor includes a stator assembly, characterized in that: the stator assembly is a stator assembly as described above.

[0011] Compared with the prior art, this utility model has the following advantages:

[0012] 1. A stator assembly, comprising a stator core, end insulation, and coil windings, wherein the end insulation is respectively installed at the upper and lower ends of the stator core before the coil windings are wound, the stator core includes a yoke and a plurality of teeth protruding from the outer side of the yoke, a winding groove is formed between two adjacent teeth, and insulating paper is installed in the winding groove, the end insulation includes an insulating yoke corresponding to the yoke and insulating teeth corresponding to each tooth, a wire passage groove is formed between two adjacent insulating teeth, the insulating paper extends into the wire passage groove, and barbs are provided on both sides of the outer end of each insulating tooth to form a U-shape, the two ends of the insulating paper are stuck in the barbs, the barbs effectively prevent the insulating paper from shifting during winding, thereby avoiding the enameled wire from winding outside the groove paper and contacting the core, resulting in poor withstand voltage.

[0013] 2. Other advantages of this utility model are described in detail in the embodiment section of the specification. Attached Figure Description

[0014] Figure 1 A perspective view provided for this utility model;

[0015] Figure 2 Exploded view provided for this utility model;

[0016] Figure 3 for Figure 1 A magnified view of part A in the image;

[0017] Figure 4 for Figure 1 A magnified view of part B in the image. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0019] Example 1:

[0020] like Figures 1 to 4As shown, this embodiment provides a stator assembly, including a stator core 1, end insulation 2, and coil windings. The end insulation 2 is respectively installed at the upper and lower ends of the stator core 1 before the coil windings are wound. The stator core 1 includes a yoke 11 and a plurality of teeth 12 protruding from the outer surface of the yoke 11. A wire-inserting groove 13 is formed between two adjacent teeth 12, and insulating paper 10 is installed in the wire-inserting groove 13. The end insulation 2 includes an insulating yoke 21 corresponding to the yoke 11 and insulating teeth 22 corresponding to each tooth 12. A wire-passing groove 23 is formed between two adjacent insulating teeth 22, and the insulating paper 10 extends into the wire-passing groove 23. The characteristic feature is that:

[0021] Each insulating tooth 22 has barbs 24 on both sides of its outer end, forming a U-shape. The two ends of the insulating paper 10 are stuck in the barbs 24. The barbs effectively prevent the insulating paper 10 from shifting during winding, thereby avoiding the enameled wire from winding outside the slotted paper and coming into contact with the iron core, resulting in poor withstand voltage.

[0022] The end face of the aforementioned insulating tooth 22 is provided with a raised rib 25, which increases the electrical clearance between the winding and the stator core 1, and at the same time facilitates the binding of the winding wire.

[0023] The bottom of the aforementioned insulating yoke 21 has several axially protruding protrusions 26. The end face of the stator core 1 is provided with positioning holes 14 corresponding to the protrusions 26. The protrusions 26 are nested in the positioning holes 14, making installation and positioning convenient.

[0024] Cover plate 101 is installed at the barbs 24 located on the two adjacent insulating teeth.

[0025] like Figure 4 As shown, the insulating tooth 22 has L-shaped barbs 24 on both sides in the middle. The L-shaped barbs 24 are fastened to the ends of the insulating paper 10 to prevent the insulating paper 10 from moving axially. The structure is reasonably arranged.

[0026] Example 2:

[0027] An external rotor motor includes a stator assembly, characterized in that: the stator assembly is a stator assembly as described in Embodiment 1 above.

[0028] The above embodiments are preferred embodiments of the present utility model, but the embodiments of the present utility model are not limited thereto. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present utility model are equivalent substitutions and are included within the protection scope of the present utility model.

Claims

1. A stator assembly, comprising a stator core (1), end insulation (2), and coil windings, wherein the end insulation (2) is respectively installed at the upper and lower ends of the stator core (1) and then the coil windings are wound thereon, the stator core (1) comprising a yoke (11) and a plurality of teeth (12) protruding from the outer side of the yoke (11), a wire-inserting groove (13) is formed between two adjacent teeth (12), and insulating paper (10) is installed in the wire-inserting groove (13), the end insulation (2) comprising an insulating yoke (21) corresponding to the yoke (11) and an insulating tooth (22) corresponding to each tooth (12), a wire-passing groove (23) is formed between two adjacent insulating teeth (22), and the insulating paper (10) extends into the wire-passing groove (23), characterized in that: Each insulating tooth (22) has barbs (24) on both sides of its outer end, forming a U-shape. The two ends of the insulating paper (10) are locked in the barbs (24) to prevent the insulating paper (10) from shifting during winding.

2. A stator assembly according to claim 1, characterized in that: The end face of the insulating tooth (22) is provided with a raised rib (25).

3. A stator assembly according to claim 2, characterized in that: Several protruding posts (26) protrude axially from the bottom of the insulating yoke (21), and the end face of the stator core (1) is provided with positioning holes (14) corresponding to the protruding posts (26), and the protruding posts (26) are nested in the positioning holes (14).

4. A stator assembly according to claim 1, 2, or 3, characterized in that: A cover plate (101) is installed at the barb (24) of two adjacent insulating teeth.

5. A stator assembly according to claim 4, characterized in that: The insulating tooth (22) has L-shaped barbs (27) on both sides in the middle. The L-shaped barbs (27) are fastened to the end of the insulating paper (10) to prevent the insulating paper (10) from moving axially.

6. An external rotor motor, comprising a stator assembly, characterized in that: The stator assembly is a stator assembly as described in any one of claims 1 to 5.

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