A fan

Abstract

The utility model relates to fan technical field provides a fan, casing, impeller and motor, the casing has motor installation unit on, installs motor on motor installation unit, installs impeller on motor, motor includes pivot, 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 multiple magnetic tiles that set up evenly in rotor frame inside, the integral forming structure that impeller, copper bush, rotor frame and multiple magnetic tiles adopt, the center of impeller has the circular boss that extends to inboard, the circumferential inboard of circular boss has annular groove, the circumferential inboard of annular groove has annular boss. The utility model discloses impeller, copper bush, rotor frame and multiple magnetic tiles adopt integral forming structure to reduce the cumulative tolerance that fan motor assembly produced, makes fan rotor and impeller installation stable, strengthens the stability between each component.

Description

Technical Field

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

[0002] Currently, fans used for cooling equipment have high requirements for dust and water resistance. Typically, methods such as injecting adhesive between components are used to improve dust and water resistance.

[0003] Blades, rotor frame, copper sleeve, and magnet are the main components of a fan. The copper sleeve is mounted on the shaft, the magnet is set on the inner circumferential wall of the rotor frame, and the rotor frame is mounted on the inner circumferential wall of the blades. In existing fan structures, the blades, rotor frame, copper sleeve, and magnet are assembled together by pressing, riveting, or bonding.

[0004] However, this assembly method can lead to problems such as excessive cumulative tolerances, poor structural stability, inadequate waterproofing and dustproofing, and reduced motor lifespan. Utility Model Content

[0005] This utility model mainly solves the technical problems in existing fan structures where blades, rotor frame, copper sleeve, and magnets are assembled together by pressing, riveting, or bonding, resulting in excessive cumulative tolerances, poor structural stability, inadequate waterproofing and dustproofing, and reduced motor life. The proposed solution is a fan in which the impeller, copper sleeve, rotor frame, and multiple magnets are integrally molded to reduce the cumulative tolerances generated during fan motor assembly, ensuring stable installation of the fan rotor and impeller, and enhancing the stability between components.

[0006] This utility model provides a fan, including a housing, an impeller, and a motor;

[0007] The housing has a motor mounting section; a motor is mounted on the motor mounting section; an impeller is mounted on the motor;

[0008] The motor includes a shaft, a stator, and a rotor; a copper sleeve is provided at the end of the shaft;

[0009] The stator includes a stator core, coils, and a cover assembly; the coils are wound around the teeth of the stator core; the stator core is covered by the cover assembly.

[0010] The rotor includes a rotor frame and a plurality of magnetic tiles evenly arranged inside the rotor frame;

[0011] The impeller, copper sleeve, rotor frame and multiple magnetic tiles adopt an integral molding structure;

[0012] The impeller has a circular protrusion extending inward at its center, and an annular groove on the circumferential inner side of the circular protrusion, and an annular boss on the circumferential inner side of the annular groove.

[0013] Preferably, the motor mounting portion has a bearing retaining portion; a bearing is installed in the bearing retaining portion;

[0014] The stator core is fitted onto the outer wall of the bearing cage.

[0015] Preferably, the end of the bearing retaining part extends into the annular groove and does not contact the bottom surface of the annular groove, the circular protrusion, or the annular protrusion.

[0016] Preferably, the end of the bearing retaining part overlaps axially with the circular protrusion and the annular protrusion.

[0017] Preferably, the copper sleeve is located within the space enclosed by the circular protrusion, the annular groove, and the annular protrusion.

[0018] Preferably, a central through hole is formed on the top surface of the rotor frame;

[0019] Multiple first holes are evenly opened on the outer side of the central through hole;

[0020] The rotor frame has multiple second holes evenly spaced around its top surface, with the second holes located near the outer side of the rotor frame's top surface.

[0021] Preferably, the bottom of the first hole and the second hole are chamfered.

[0022] Preferably, the impeller has an annular impeller wall and an impeller top integrally formed with the impeller wall;

[0023] Multiple blades are evenly arranged on the outer periphery of the impeller wall;

[0024] The annular groove, protrusion, and annular protrusion are located on the inner side of the top of the impeller.

[0025] Preferably, the inner surface of the top of the impeller has a plurality of circumferentially evenly arranged dot-shaped protrusions;

[0026] The dot-shaped protrusions are integrally formed in the corresponding second holes.

[0027] Preferably, the magnetic tile has a recessed structure at the top center.

[0028] This utility model provides a fan with a labyrinth structure formed between the circular protrusion, annular groove, annular protrusion, and the end of the bearing retainer. This structure prevents dust and other contaminants from entering the bearing with the airflow, thus avoiding excessive fan noise and impacting bearing life. The impeller, copper sleeve, rotor frame, and multiple magnets are integrally molded. During fan manufacturing, after the impeller, rotor frame, magnets, and copper sleeve are assembled, they are placed in an injection mold and resin is injected for integral molding. This reduces the cumulative tolerances generated during fan motor assembly, ensuring stable installation of the fan rotor and impeller, and enhancing the stability and salt corrosion resistance of each component. The bottoms of the first and second holes are chamfered, and the resin is also injected into the chamfer. The injection-molded structure forms a protruding restraining structure at the chamfer, which can overcome rotational torque, prevent the rotor frame and impeller from detaching, reduce the risk of impeller detachment, and improve product stability. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the fan provided by this utility model;

[0030] Figure 2 This is a schematic diagram of the structure of the housing provided by this utility model;

[0031] Figure 3 This is a schematic diagram of the structure of the motor provided by this utility model;

[0032] Figure 4 This is a schematic diagram of the internal structure of the motor provided by this utility model;

[0033] Figure 5 This is a cross-sectional view of the fan provided by this utility model;

[0034] Figure 6 This is a schematic diagram of the impeller structure provided by this utility model;

[0035] Figure 7 This is a schematic diagram of the rotor frame provided by this utility model.

[0036] Reference numerals: 1. Casing; 2. Impeller; 3. Motor; 101. Casing wall; 102. Motor mounting part; 103. Bearing cage; 201. Impeller wall; 202. Impeller top; 203. Blade; 204. Dot-shaped protrusion; 205. Annular boss; 206. Annular groove; 207. Circular protrusion; 208. Magnet mounting part; 301. Rotor frame; 302. Magnet; 303. Stator core; 304. Coil; 305. Cover component; 306. Bearing; 307. Copper sleeve; 308. Shaft; 3011. First hole; 3012. Second hole; 3013. Central through hole. Detailed Implementation

[0037] 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.

[0038] like Figure 1 As shown in the figure, a fan provided by this utility model embodiment includes: a housing 1, an impeller 2, and a motor 3.

[0039] like Figure 2 As shown, the housing 1 has a housing wall portion 101 and a motor mounting portion 102 integrally formed with the housing wall portion 101; a motor 3 is mounted on the motor mounting portion 102; an impeller 2 is mounted on the motor 3; a bearing retaining portion 103 is provided on the motor mounting portion 102; a bearing 306 is installed inside the bearing retaining portion 103.

[0040] like Figure 3-5 As shown, the motor 3 includes a rotating shaft 308, a stator, and a rotor; a copper sleeve 307 is provided at the end of the rotating shaft 308.

[0041] The stator includes a stator core 303, a coil 304, and a cover component 305; the coil 304 is wound around the teeth of the stator core 303; the stator core 303 is covered by the cover component 305; the stator core 303 is sleeved on the outer wall of the bearing cage 103.

[0042] The rotor includes a rotor frame 301 and a plurality of magnetic tiles 302 uniformly arranged inside the rotor frame 301.

[0043] In this utility model, the impeller 2, copper sleeve 307, rotor frame 301, and multiple magnetic tiles 302 adopt an integrally formed structure. For example... Figure 6 As shown, the impeller 2 has a circular protrusion 207 extending inward at its center. The circular protrusion 207 has an annular groove 206 on its inner circumferential side, and an annular boss 205 on its inner circumferential side. The end of the bearing retaining part 103 extends into the annular groove 206 and does not contact the bottom surface of the annular groove 206, the circular protrusion 207, or the annular boss 205. The end of the bearing retaining part 103 overlaps axially with the circular protrusion 207 and the annular boss 205 but does not contact them.

[0044] In this invention, a labyrinth structure is formed between the circular protrusion 207, the annular groove 206, the annular protrusion 205 and the end of the bearing retaining part 103, which can prevent dust and other particles from entering the bearing 306 with the airflow, causing excessive fan noise and affecting the life of the bearing 306.

[0045] During fan manufacturing, the impeller 2, rotor frame 301, magnet 302, and copper sleeve 307 are assembled and then injected into an injection mold to form a single unit. This reduces the cumulative tolerances generated during fan motor assembly, ensuring stable installation of the fan rotor and impeller 2, and enhancing the stability and salt corrosion resistance of the components. After injection molding, the wall of the rotor frame 301 is encased within the impeller wall 201 of the impeller 2, and the copper sleeve 307 is located within the space enclosed by the circular protrusion 207, the annular groove 206, and the annular protrusion 205.

[0046] Based on the above solutions, such as Figure 7 As shown, a central through hole 3013 is formed on the top surface of the rotor frame 301. Multiple first holes 3011 are evenly distributed on the outer side of the central through hole 3013; multiple second holes 3012 are evenly distributed circumferentially on the top surface of the rotor frame 301, with the second holes 3012 located near the outer side of the top surface of the rotor frame 301. The central through hole 3013 is used to install the copper sleeve 307; the first holes 3011 are resin injection holes used for injection molding the circular protrusion 207, the annular groove 206, and the annular boss 205; the second holes 3012 are resin injection holes used for injection molding the dotted protrusions 204 of the impeller 2. The bottoms of the first holes 3011 and the second holes 3012 are chamfered, and the resin is also injected into the chamfer. The injection-molded structure forms a protruding limiting structure at the chamfer, which can overcome rotational torque, prevent the rotor frame 301 and the impeller 2 from separating, reduce the risk of the impeller 2 falling off, and improve the product's stability.

[0047] The impeller 2 has an annular impeller wall 201 and an impeller top 202 integrally formed with the impeller wall 201; a plurality of blades 203 are evenly arranged on the outer periphery of the impeller wall 201; the annular groove 206, protrusion 207, and annular protrusion 205 are located on the inner side of the impeller top 202. The inner side of the impeller top 202 has a plurality of circumferentially evenly arranged dot-shaped protrusions 204; the dot-shaped protrusions 204 are integrally formed in the corresponding second holes 3012.

[0048] In addition, a recessed structure is provided in the middle of the top of the magnetic tile 302. A magnetic tile mounting part 208 is injection molded on the inner side of the impeller wall 201, and correspondingly, a protruding structure corresponding to the recessed structure is also injection molded on the top of the magnetic tile mounting part 208.

[0049] 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 fan, comprising: The casing (1), impeller (2), and motor (3) are also included. The housing (1) has a motor mounting part (102); a motor (3) is mounted on the motor mounting part (102); an impeller (2) is mounted on the motor (3); The motor (3) includes a shaft (308), a stator and a rotor; a copper sleeve (307) is provided at the end of the shaft (308); The stator includes a stator core (303), a coil (304), and a cover component (305); the coil (304) is wound around the teeth of the stator core (303); the cover component (305) covers the outside of the stator core (303); The rotor includes a rotor frame (301) and a plurality of magnetic tiles (302) uniformly arranged inside the rotor frame (301); Its features are: The impeller (2), copper sleeve (307), rotor frame (301) and multiple magnets (302) adopt an integral molding structure; The impeller (2) has a circular protrusion (207) extending inward at its center, and the circular protrusion (207) has an annular groove (206) on its circumferential inner side, and the annular groove (206) has an annular boss (205) on its circumferential inner side.

2. The fan according to claim 1, characterized in that, The motor mounting part (102) has a bearing retaining part (103); a bearing (306) is installed in the bearing retaining part (103); The stator core (303) is sleeved on the outer wall of the bearing cage (103).

3. The fan according to claim 2, characterized in that, The end of the bearing retaining part (103) extends into the annular groove (206) and does not contact the bottom surface of the annular groove (206), the circular protrusion (207), or the annular protrusion (205).

4. The fan according to claim 3, characterized in that, The end of the bearing retainer (103) overlaps axially with the circular protrusion (207) and the annular protrusion (205).

5. The fan according to claim 1, characterized in that, The copper sleeve (307) is located within the space enclosed by the circular protrusion (207), the annular groove (206), and the annular protrusion (205).

6. The fan according to claim 1, characterized in that, The rotor frame (301) has a central through hole (3013) on its top surface; Multiple first holes (3011) are evenly opened on the outer side of the central through hole (3013); The rotor frame (301) has a plurality of second holes (3012) evenly opened on the top surface of the rotor frame (301) in a circumferential direction. The second holes (3012) are close to the outer side of the top surface of the rotor frame (301).

7. The fan according to claim 6, characterized in that, The bottom of the first hole (3011) and the second hole (3012) are chamfered.

8. The fan according to claim 6, characterized in that, The impeller (2) has an annular impeller wall (201) and an impeller top (202) integrally formed with the impeller wall (201); Multiple blades (203) are evenly arranged on the outer periphery of the impeller wall (201); The annular groove (206), protrusion (207), and annular protrusion (205) are located on the inner side of the impeller top (202).

9. The fan according to claim 8, characterized in that, The inner surface of the top (202) of the impeller has a plurality of circumferentially uniformly arranged dot-shaped protrusions (204); The dotted protrusions (204) are integrally formed in the corresponding second hole (3012).

10. The fan according to claim 1, characterized in that, The magnetic tile (302) has a recessed structure in the middle of its top.

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