A motor for a fan

Abstract

The utility model relates to motor technical field provides a motor for fan, the motor includes stator and rotor, the stator includes: stator core, coil and cover component, the outside cover of stator core has cover component, the rotor includes rotor frame and the rotor magnet set up in the inside of rotor frame, the stator core has annular yoke portion and the multiple tooth portions that set up uniformly in annular yoke portion outer periphery, the inner periphery of annular yoke portion sets up multiple convex parts, the inner end surface of convex part is on the same circumference, multiple convex parts are equidistantly set up on the circumference, the circumferential length of convex part is less than the distance between adjacent convex parts, the utility model sets up multiple convex parts in the inner periphery of annular yoke portion of stator core, and the recessed part formed between adjacent convex parts axially penetrates stator core, only needs to inject glue from one side of motor, improves the effect of injecting glue, and does not need to carry out the glue supplement of the upper side and the lower side of motor respectively after assembling is completed, makes the sealing performance better.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and in particular to a motor for a fan. Background Technology

[0002] Fan motors typically require high sealing performance. Electronic components on the circuit board are easily affected by moisture and salt and alkali in the air, which accelerates aging and shortens the life of the motor. Therefore, the sealing performance of the circuit board is particularly important.

[0003] In the existing structure, the inner ring of the motor stator core is circular, and the inner circle of the stator core is positioned to mate with the bearing retainer on the housing. During glue application, glue is applied from the top of the stator core towards the circuit board. Because the gap between the inner circle of the stator core and the bearing retainer is small, applying glue from one side cannot allow the glue to flow sufficiently to coat the circuit board.

[0004] Therefore, to ensure sealing performance, the existing motor structure requires adhesive to be applied to both the upper and lower sides of the motor after assembly; however, problems such as delamination, cracking, non-fusion, unevenness, and air bubbles are prone to occur after adhesive application. Utility Model Content

[0005] This invention primarily addresses the technical problems of existing motor structures, such as the small gap between the inner circle of the stator core and the bearing mounting sleeve, the inability of single-sided glue injection to fully flow and wrap the circuit board, and the need for additional glue application to the upper and lower sides of the motor after assembly. The invention proposes a fan motor with multiple protrusions on the inner circumference of the annular yoke of the stator core. The recesses formed between adjacent protrusions axially penetrate the stator core, allowing glue to be injected only from one side of the motor, improving the glue application effect and eliminating the need for separate glue application to the upper and lower sides of the motor after assembly, thus improving sealing performance.

[0006] This utility model provides a motor for a fan, the motor including a stator and a rotor;

[0007] The stator includes: a stator core, coils, and a cover component; the stator core is covered by the cover component.

[0008] The rotor includes a rotor frame and rotor magnets disposed inside the rotor frame;

[0009] The stator core has an annular yoke and a plurality of teeth evenly arranged on the outer periphery of the annular yoke.

[0010] The inner circumference of the annular yoke is provided with multiple protrusions; the inner end faces of the protrusions are on the same circumference.

[0011] Preferably, multiple protrusions are arranged at equal intervals on the circumference.

[0012] Preferably, the circumferential length of the protrusion is less than the distance between adjacent protrusions.

[0013] Preferably, the protrusion and the tooth are misaligned in the circumferential direction.

[0014] Preferably, the two sides of the protrusion adopt an arc-shaped transition structure.

[0015] Preferably, a coil is wound around the teeth.

[0016] Preferably, the protrusion is fixed to the outer periphery of the bearing retainer;

[0017] The bearing retainer is integrally formed with the fan housing.

[0018] Preferably, the bottom of the cover component is provided with a raised ring.

[0019] Preferably, the bearing retaining part is located on the motor mounting part of the fan housing;

[0020] A groove is provided on the motor mounting part; the protrusion extends into the groove.

[0021] Preferably, a sealing ring is provided in the groove.

[0022] This invention provides a fan motor with multiple protrusions on the inner circumference of the annular yoke of the stator core. These protrusions form recesses that facilitate glue injection and filling, ensuring the stability of the stator core while increasing the length of the circumferential glue injection holes. This allows for greater glue flow and improved sealing performance. The recesses formed between adjacent protrusions provide axial penetration space for the stator core, enabling glue injection from only one side of the motor, improving the glue injection effect and eliminating the need for separate glue application to the upper and lower sides of the motor after assembly. The circumferentially staggered arrangement of the protrusions and teeth facilitates stamping and enhances the strength of the stator core. The arc-shaped transition structure on both sides of the protrusions facilitates glue flow, providing a guiding effect and preventing scratching of the bearing retainer during insertion. The sealing structure formed by the protrusions, recesses, and sealing rings prevents glue overflow. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of the motor for a fan provided by this utility model;

[0024] Figure 2 This is a cross-sectional view of the motor for a fan provided by this utility model;

[0025] Figure 3 This is a schematic diagram of the stator core provided by this utility model;

[0026] Figure 4This is an application diagram of the motor for a fan provided by this utility model;

[0027] Figure 5 This is a schematic diagram of the fan housing provided by this utility model.

[0028] Reference numerals: 1. Cover component; 2. Stator core; 3. Fan housing; 101. Protrusion; 201. Annular yoke; 202. Tooth; 203. Protrusion; 204. Recess; 301. Groove; 302. Sealing ring; 303. Bearing retainer. Detailed Implementation

[0029] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for explaining this utility model and not for limiting it. Furthermore, it should be noted that, for ease of description, only the parts related to this utility model are shown in the accompanying drawings, not all of them.

[0030] like Figures 1-2 As shown in the figure, an embodiment of the present invention provides a motor for a fan, the motor comprising a stator and a rotor.

[0031] The stator includes: a stator core 2, coils, and a cover component 1; the stator core 2 is covered by the cover component 1. The rotor is disposed outside the stator; the rotor includes a rotor frame and rotor magnets disposed inside the rotor frame; the rotor frame is fixed on a rotating shaft.

[0032] like Figure 3 As shown, the stator core 2 has an annular yoke 201 and a plurality of teeth 202 evenly arranged on the outer periphery of the annular yoke 201; a coil is wound on the teeth 202.

[0033] The annular yoke 201 has multiple protrusions 203 on its inner circumference; the inner end faces of the protrusions 203 are on the same circumference. The multiple protrusions 203 are evenly spaced on the circumference, giving the inner circumference of the annular yoke 201 a flower-like appearance. The circumferential length of each protrusion 203 is less than the distance between adjacent protrusions 203, ensuring the stability of the stator core 2 installation. The recesses 204 formed between adjacent protrusions 203 facilitate glue injection, allowing glue to be injected and filled.

[0034] The protrusion 203 and the tooth 202 are offset in the circumferential direction, which facilitates stamping and improves the strength of the stator core 2. The two sides of the protrusion 203 adopt an arc-shaped transition structure, which allows the adhesive to flow more easily, has a guiding effect, and can prevent scratching of the bearing retainer when inserted. A gasket is also provided on the top of the stator core 2 to prevent the sealant from expanding.

[0035] The stator core 2 of this invention has multiple protrusions 203 on the inner circumference of the annular yoke 201, which can form recesses 204 that facilitate glue injection and filling. This ensures the stability of the stator core 2 while increasing the length of the circumferential glue injection hole, allowing more glue to flow in and improving sealing performance. The recesses 204 formed between adjacent protrusions 203 are axially penetrating spaces of the stator core 2, so glue only needs to be injected from one side of the motor, improving the glue injection effect, and eliminating the need to apply glue to the upper and lower sides of the motor separately after assembly.

[0036] Based on the above scheme, the protrusion 203 is fixed to the outer periphery of the bearing retaining part 303; the bearing retaining part 303 is integrally formed with the fan housing 3.

[0037] like Figures 4-5 As shown, a raised section 101 is provided at the bottom of the cover component 1 to prevent glue from flowing out. The bearing retaining part 303 is located on the motor mounting part of the fan housing 3; a groove 301 is provided on the motor mounting part; the raised section 101 extends into the groove 301. A sealing ring 302 is provided in the groove 301. The sealing structure formed by the raised section 101, the groove 301, and the sealing ring 302 can prevent glue from overflowing.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications to the technical solutions described in the foregoing embodiments, or equivalent substitutions for some or all of the technical features, do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A motor for a fan, the motor comprising a stator and a rotor; The stator includes: Stator core (2), coil and cover component (1); the stator core (2) is covered by the cover component (1); The rotor includes a rotor frame and rotor magnets disposed inside the rotor frame; Its features are: The stator core (2) has an annular yoke (201) and a plurality of teeth (202) evenly arranged on the outer periphery of the annular yoke (201); The inner circumference of the annular yoke (201) is provided with a plurality of protrusions (203); the inner end faces of the protrusions (203) are on the same circumference.

2. The motor for a fan according to claim 1, characterized in that, Multiple protrusions (203) are evenly spaced on the circumference.

3. The motor for a fan according to claim 1, characterized in that, The circumferential length of the protrusion (203) is less than the distance between adjacent protrusions (203).

4. The motor for a fan according to claim 3, characterized in that, The protrusion (203) and the tooth (202) are misaligned in the circumferential direction.

5. The motor for a fan according to claim 1, characterized in that, The two sides of the protrusion (203) adopt an arc-shaped transition structure.

6. The motor for a fan according to claim 1, characterized in that, A coil is wound on the tooth (202).

7. The motor for a fan according to claim 1, characterized in that, The protrusion (203) is fixed to the outer periphery of the bearing retainer; The bearing retainer is integrally formed with the fan housing (3).

8. The motor for a fan according to claim 7, characterized in that, The bottom of the cover component (1) is provided with a ring of protrusions (101).

9. The motor for a fan according to claim 8, characterized in that, The bearing retainer is located on the motor mounting part of the fan housing (3); A groove (301) is provided on the motor mounting part; the protrusion (101) extends into the groove (301).

10. The motor for a fan according to claim 9, characterized in that, A sealing ring (302) is provided in the groove (301).

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