Stator assembly and external rotor motor using same

Abstract

The utility model discloses a stator assembly and an external rotor motor using the same, the stator assembly comprises a stator iron core, an end insulator and a coil winding, the stator iron core comprises a yoke part and a plurality of tooth parts, a wire embedding groove is formed between two adjacent tooth parts, insulation paper is installed in the wire embedding groove, and the end insulator is connected with the coil winding. The end insulation comprises an insulation yoke part arranged corresponding to the yoke part and insulation tooth parts arranged corresponding to the tooth parts, a wire passing groove is formed between every two adjacent insulation tooth parts, the insulation paper extends into the wire passing grooves, a positioning structure is arranged on the end face of each insulation tooth part, an elastic fixing piece is arranged between the corresponding insulation tooth parts at the upper end and the lower end in a sleeving mode, and the elastic fixing piece is fixed to the insulation yoke part. The elastic fixing piece is fixed on the positioning structure on the insulation tooth portion, the insulation paper located on the two sides of the insulation tooth portion is attached to the side wall of the tooth portion of the stator iron core through the elastic principle of the elastic fixing piece, and the insulation paper is attached to the iron core more tightly through the elastic fixing piece. In the winding process, the phenomena of wire out-of-groove, breakdown and the like caused by warped or flanged insulation paper are prevented, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to a stator assembly and an outer rotor motor using the stator assembly. Background Art

[0002] The existing stator assembly includes a stator core, end insulation and coil windings. The end insulations are respectively installed at the upper and lower ends of the stator core and then 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 wire embedding groove is formed between two adjacent teeth, and insulating paper is installed in the wire embedding 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. The insulating paper is not fixed by a fixing part during the production process, which causes the insulating paper to warp or flanging during the winding process, resulting in safety hazards of wire exiting the groove and breakdown during the winding process. Summary of the invention

[0003] The utility model aims to provide a stator assembly and an outer rotor motor using the same, so as to solve the technical problem in the prior art that the insulating paper is not fixed by fixing parts during the production process, resulting in the insulating paper of the coil winding being warped or flanging during the winding process, causing the potential safety hazard of the insulating paper coming out of the groove and being punctured during the winding process.

[0004] The technical solution of the utility model is achieved in this way:

[0005] The utility model provides a stator assembly, including a stator core, an end insulation and a coil winding, wherein the end insulation is respectively installed at the upper and lower ends of the stator core and then the coil winding is wound, the stator core includes a yoke and a plurality of teeth protruding from the outer side of the yoke, a wire embedding groove is formed between two adjacent teeth, and insulating paper is installed in the wire embedding groove, the end insulation includes an insulating yoke corresponding to the yoke and an insulating tooth corresponding to each tooth, a wire passing groove is formed between two adjacent insulating tooth portions, and the insulating paper extends into the wire passing groove, and the utility model is characterized in that:

[0006] A positioning structure is provided on the end face of each insulating tooth portion, and an elastic fixing piece is sleeved between the insulating teeth portions corresponding to the upper and lower ends. The elastic fixing piece is fixed to the positioning structure on the insulating tooth portion, and the insulating paper located on both sides of the insulating tooth portion is adhered to the inner side wall of the tooth portion of the stator core through the elastic principle of the elastic fixing piece.

[0007] The positioning structure described above comprises a positioning boss, a positioning groove is provided in the middle of the positioning boss, and the elastic fixing member is nested in the positioning groove to achieve positioning.

[0008] The elastic fixing member mentioned above is a rubber band.

[0009] A plurality of protruding columns are axially protruded from the bottom of the insulating yoke at the upper and lower ends, and positioning holes corresponding to the protruding columns are provided on the two end surfaces of the stator core, and the protruding columns are nested in the positioning holes.

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

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

[0012] 1. The utility model includes a stator core, end insulation and coil windings. The end insulations are respectively installed at the upper and lower ends of the stator core and then 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 wire embedding groove is formed between two adjacent teeth, and insulating paper is installed in the wire embedding groove. The end insulation includes an insulating yoke corresponding to the yoke and an insulating tooth corresponding to each tooth. A wire passing groove is formed between two adjacent insulating tooth portions, and the insulating paper extends into the wire passing groove. A positioning structure is provided on the end surface of each insulating tooth portion. An elastic fixing piece is provided between the insulating teeth corresponding to the upper and lower ends. The elastic fixing piece is fixed to the positioning structure on the insulating tooth portion, and the insulating paper on both sides of the insulating tooth portion is attached to the inner side wall of the tooth portion of the stator core through the elastic principle of the elastic fixing piece. The elastic fixing piece is used to make the insulating paper fit the core more tightly, and the phenomenon of wire coming out of the groove and breaking through caused by warping or flanging of the insulating paper during the winding process is prevented, thereby improving product quality.

[0013] 2. Other advantages of the utility model are described in detail in the embodiment section of the specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A stereogram provided for the utility model;

[0015] Figure 2 for Figure 1 A partial enlarged view of middle A;

[0016] Figure 3 A partial exploded view provided for the utility model;

[0017] Figure 4 An exploded view provided for the utility model;

[0018] Figure 5 A front view provided for the utility model;

[0019] Figure 6 for Figure 5 Cross-sectional view of the middle BB;

[0020] Figure 7 yes Figure 6 A partial enlarged view of part C;

[0021] Figure 8 It is a three-dimensional diagram of the end insulation of the utility model. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Embodiment 1:

[0024] like Figures 1 to 8 As shown, this embodiment provides a stator assembly, including a stator core 1, an end insulation 2 and a coil winding, the end insulation 2 is respectively installed at the upper and lower ends of the stator core 1 and then the coil winding is wound, the stator core 1 includes a yoke 11 and a plurality of teeth 12 protruding from the outer side of the yoke 11, a wire embedding groove 13 is formed between two adjacent teeth 12, and an insulating paper 10 is installed in the wire embedding groove 13, the end insulation 2 includes 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 tooth 22, and the insulating paper 10 extends into the wire passing groove 23, characterized in that:

[0025] A positioning structure 3 is provided on the end face of each insulating tooth portion 22, and an elastic fixing member 4 is sleeved between the insulating tooth portions 22 corresponding to the upper and lower ends. The elastic fixing member 4 is fixed to the positioning structure on the insulating tooth portion 22, and the insulating paper 10 located on both sides of the insulating tooth portion 22 is adhered to the inner wall of the tooth portion 12 of the stator core 1 through the elastic principle of the elastic fixing member 4. The elastic fixing member is used to make the insulating paper fit the core more tightly, and during the winding process, the insulating paper is prevented from warping or flanging, which causes the wire to go out of the slot, break through, etc., thereby improving product quality.

[0026] The positioning structure 3 comprises a positioning boss 31, a positioning groove 32 is provided in the middle of the positioning boss 31, and the elastic fixing member 4 is nested in the positioning groove 32 to achieve positioning. The positioning groove effectively prevents the elastic fixing member from shifting during the winding process, and has a simple structure and reasonable layout.

[0027] The elastic fixing member 4 is a rubber band.

[0028] A plurality of bosses 221 protrude axially from the bottom of the insulating yoke 21 at the upper and lower ends. Positioning holes 14 corresponding to the bosses 221 are provided on the two end surfaces of the stator core 1. The bosses 221 are nested in the positioning holes 14. The installation structure is simple and the positioning effect is good.

[0029] Embodiment 2:

[0030] An outer rotor motor includes a stator assembly, characterized in that the stator assembly is a stator assembly described in the first embodiment.

[0031] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited thereto. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention are equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A stator assembly, comprising a stator core (1), an end insulation (2) and a coil winding, wherein the end insulation (2) is respectively installed at the upper and lower ends of the stator core (1) and then the coil winding is wound, the stator core (1) comprises a yoke (11) and a plurality of teeth (12) protruding from the outer side of the yoke (11), a wire embedding groove (13) is formed between two adjacent teeth (12), and insulating paper (10) is installed in the wire embedding groove (13), the end insulation (2) comprises an insulating yoke (21) arranged corresponding to the yoke (11) and insulating teeth (22) arranged 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: A positioning structure (3) is provided on the end surface of each insulating tooth portion (22); an elastic fixing member (4) is sleeved between the insulating tooth portions (22) corresponding to the upper and lower ends; the elastic fixing member (4) is fixed to the positioning structure on the insulating tooth portion (22); and the insulating paper (10) located on both sides of the insulating tooth portion (22) is adhered to the inner side wall of the tooth portion (12) of the stator core (1) through the elastic principle of the elastic fixing member (4).

2. A stator assembly according to claim 1, characterized in that: The positioning structure (3) comprises a positioning boss (31), a positioning groove (32) is provided in the middle of the positioning boss (31), and the elastic fixing member (4) is nested in the positioning groove (32) to achieve positioning.

3. A stator assembly according to claim 1 or 2, characterized in that: The elastic fixing member (4) is a rubber band.

4. A stator assembly according to claim 3, characterized in that: A plurality of protruding columns (221) protrude axially from the bottom of the insulating yoke (21) at the upper and lower ends, and positioning holes (14) corresponding to the protruding columns (221) are provided on the two end surfaces of the stator core (1), and the protruding columns (221) are nested in the positioning holes (14).

5. An outer 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 4 above.

Images