Fan

Abstract

The utility model relates to the technical field of fans, and provides a fan which comprises a machine shell, an impeller and a motor. The machine shell is provided with a machine shell base. A motor is installed on the machine shell base. An impeller is mounted on the motor; the motor comprises a stator and a rotor; the stator comprises a stator iron core, a bearing retainer, an annular cap and a cover part; the stator core is sleeved on the outer wall of the bearing retainer; the stator core is covered with a cover part; a through hole is formed in the center of the cover part; the through hole of the cover part is in interference fit connection with the outer wall of the top of the bearing retainer; an annular cap covers the top of the bearing retainer; and the annular cap is positioned above the axial direction of the through hole. Glue expansion in the cover component at high temperature can be limited, the cover component is prevented from moving upwards and floating, and the sealing effect of the fan is enhanced.

Description

Technical Field

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

[0002] Cooling fans are typically installed in equipment that requires heat dissipation. The main structure of a fan includes a casing, a motor, and an impeller. The motor drives the impeller to rotate; the motor has a stator and a rotor, and the fan is waterproofed by sealing the stator.

[0003] Currently, the sealing treatment for motor stators involves installing a cover component on the outer periphery of the stator. The bottom outer periphery of the cover component is fixed to the inner periphery of the base part of the motor housing by bonding or other methods, thereby forming a sealed space. Waterproof adhesive is then injected into the sealed space, so that the entire stator part is wrapped in the sealant to achieve a waterproof effect.

[0004] However, in actual use, the adhesive injected inside the cover component will expand due to increased ambient temperature. This expanded adhesive will cause the cover component to float, reducing the sealing effect and affecting the overall waterproof performance of the fan. Furthermore, if greater expansion and deformation occur, the floated cover component may come into contact with the rotor, affecting the fan's rotation. Utility Model Content

[0005] This invention primarily addresses the technical problem in existing fans where the adhesive inside the cover component expands due to increased ambient temperature, causing the cover component to float and reducing its sealing effect. The invention proposes a fan that can limit the expansion of adhesive inside the cover component at high temperatures, preventing the cover component from shifting upwards and floating, thereby enhancing the fan's sealing effect.

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

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

[0008] The motor includes a stator and a rotor; the stator includes a stator core, a bearing cage, an annular cap, and a cover component; the stator core is sleeved on the outer wall of the bearing cage; the stator core is covered by the cover component.

[0009] The cover component has a through hole at its center;

[0010] The through hole of the cover component is interference-fitted with the top outer wall of the bearing cage;

[0011] The bearing cage is covered with an annular cap on top; the annular cap is located axially above the through hole.

[0012] Preferably, the cover component has an integrally formed cylindrical portion and an axial end portion;

[0013] The through hole is located at the center of the axial end;

[0014] There is a recess between the axial end and the through hole.

[0015] Preferably, the inner circumferential surface of the cylindrical portion is fixed to the radial outer side of the stator core;

[0016] The axial end covers one axial end of the stator core.

[0017] Preferably, the annular cap has a protrusion on its radially outer side;

[0018] The protrusion is located axially above the recess of the cover component.

[0019] Preferably, a sealant is applied at the junction of the cover component, the annular cap, and the bearing cage.

[0020] Preferably, the housing has a housing wall portion;

[0021] The casing wall is connected to the casing base through multiple ribs.

[0022] Preferably, the outer periphery of the housing base has an annular wall portion.

[0023] This utility model provides a fan in which an annular cap is disposed on the upper end of a bearing cage. The annular cap provides lateral restraint for the bearing cage and axial restraint for the cover component. The annular cap limits the expansion of adhesive inside the cover component at high temperatures, preventing the cover component from shifting upwards and floating, thus enhancing the fan's sealing effect. A recessed portion is provided, and the annular cap extends into the top of the recessed portion, allowing the fan of this utility model to prevent the cover component from shifting upwards and floating without increasing space. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the fan provided by this utility model;

[0025] Figure 2 This is a schematic diagram of the internal structure of the fan provided by this utility model;

[0026] Figure 3 This is a cross-sectional view of the fan provided by this utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the housing provided by this utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the motor stator provided by this utility model;

[0029] Figure 6This is a structural schematic diagram of the cover component provided by this utility model;

[0030] Figure 7 This is a schematic diagram showing the fit between the ring cap and the bearing cage provided by this utility model;

[0031] Figure 8 This is a schematic diagram of the structure of the ring-shaped cap provided by this utility model.

[0032] Reference numerals: 1. Housing; 2. Motor; 3. Impeller; 101. Housing wall; 102. Housing base; 103. Annular wall; 104. Rib; 301. Cover component; 302. Annular cap; 303. Bearing cage; 304. Stator core; 3011. Cylindrical part; 3012. Axial end; 3013. Through hole; 3014. Recess. Detailed Implementation

[0033] 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.

[0034] like Figure 1-3 As shown in the figure, a fan provided by this utility model embodiment includes a housing 1, an impeller 2, and a motor 3.

[0035] like Figure 4 As shown, the housing 1 has a housing base 102; a motor 3 is mounted on the housing base 102; an impeller 2 is mounted on the motor 3. The housing 1 has a housing wall 101; the housing wall 101 is connected to the housing base 102 through multiple ribs 104. The outer periphery of the housing base 102 has an annular wall 103.

[0036] The motor 3 includes a stator and a rotor, with the rotor mounted on the outside of the stator and an impeller 2 mounted on the outside of the rotor. Figure 5 As shown, the stator includes a stator core 304, a bearing cage 303, an annular cap 302, and a cover component 301; the stator core 304 is sleeved on the outer wall of the bearing cage 303; the stator core 304 is covered by the cover component 301.

[0037] like Figure 6 As shown, the cover component 301 has a through hole 3013 at its center; the through hole 3013 of the cover component 301 is interference-fitted with the top outer wall of the bearing cage 303. Figure 7As shown, the bearing cage 303 is topped with an annular cap 302; the annular cap 302 is located axially above the through hole 3013. The cover component 301 has an integrally formed cylindrical portion 3011 and an axial end portion 3012; the through hole 3013 is located at the center of the axial end portion 3012; a recess 3014 is provided between the axial end portion 3012 and the through hole 3013. The inner circumferential surface of the cylindrical portion 3011 is fixed to the radially outer side of the stator core 304; the axial end portion 3012 covers one axial end of the stator core 304. The cover component 301 is filled with sealant by injecting glue.

[0038] like Figure 8 As shown, the annular cap 302 has a protrusion 3021 on its radially outer side; the protrusion 3021 is located axially above the recess 3014 of the cover component 301, and the protrusion 3021 has a certain thickness. Protrusion 3021 increases the lateral width of the annular cap 302, preventing the cover component from expanding. The recess 3014 is provided, and the annular cap 302 extends above the recess 3014, preventing the cover component 301 from shifting upwards and floating up without increasing the space required for the fan of this invention.

[0039] Sealant is applied at the junction of the cover component 301, the annular cap 302, and the bearing cage 303. The annular cap 302 can be a copper cap. After the annular cap 302 is pressed into the bearing cage 303, sealant is applied at the junction of the cover component 301, the annular cap 302, and the bearing cage 303 to enhance the structural stability of the stator and prevent glue from overflowing after the stator is filled with glue.

[0040] In this utility model, the annular cap 302 is pressed into the upper end of the bearing cage 303. The annular cap 302 provides lateral limitation for the bearing cage 303 and axial limitation for the cover component 301. The annular cap 302 can limit the expansion of the glue inside the cover component 301 at high temperature and prevent the cover component 301 from shifting upward and floating.

[0041] 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, characterized in that, It includes a housing (1), an impeller (2), and a motor (3); The housing (1) has a housing base (102); a motor (3) is mounted on the housing base (102); an impeller (2) is mounted on the motor (3); The motor (3) includes a stator and a rotor; the stator includes a stator core (304), a bearing cage (303), an annular cap (302), and a cover component (301); the stator core (304) is sleeved on the outer wall of the bearing cage (303); the stator core (304) is covered by the cover component (301); The cover component (301) has a through hole (3013) at its center; The through hole (3013) of the cover component (301) is interference-fitted with the top outer wall of the bearing cage (303); The bearing cage (303) is covered with an annular cap (302) on top; the annular cap (302) is located axially above the through hole (3013).

2. The fan according to claim 1, characterized in that, The cover component (301) has an integrally formed cylindrical portion (3011) and an axial end portion (3012); The through hole (3013) is located at the center of the axial end (3012); The axial end (3012) has a recess (3014) between it and the through hole (3013).

3. The fan according to claim 2, characterized in that, The inner circumferential surface of the cylindrical portion (3011) is fixed to the radial outer side of the stator core (304); The axial end (3012) covers one axial end of the stator core (304).

4. The fan according to claim 2, characterized in that, The ring cap (302) has a protrusion (3021) on its radially outer side; The protrusion (3021) is located axially above the recess (3014) of the cover component (301).

5. The fan according to claim 1, characterized in that, Sealant is applied at the junction of the cover component (301), the annular cap (302), and the bearing cage (303).

6. The fan according to claim 1, characterized in that, The housing (1) has a housing wall portion (101); The housing wall (101) is connected to the housing base (102) via multiple ribs (104).

7. The fan according to claim 6, characterized in that, The outer periphery of the housing base (102) has an annular wall (103).

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