Fan with double dustproof structures

Abstract

The utility model discloses a fan with a dual dustproof structure, which comprises a fan frame, fan blades and a motor component, the fan blades are mounted on a stator seat of the fan frame through a shaft core of the motor component, the shaft core is inserted into a middle tube of the stator seat through a bearing, and a silicon steel sheet of the motor component and a coil holder are mounted on the middle tube together; a coil holder tube is arranged in the center of the coil holder; the inner diameter of the coil holder tube is larger than the outer diameter of the middle tube; a sealing ring is arranged in the coil holder pipe and covers the top end of the middle pipe, a gap of 0.01-0.03 mm is formed between the sealing ring and the top end of the middle pipe, and the outer diameter of the sealing ring is 0.01-0.03 mm smaller than the inner diameter of the coil holder pipe; and the silicon steel sheet extends inwards to be in contact with the middle pipe to form a circle of boss so as to seal a gap between the coil holder and the middle pipe. Therefore, a dual dustproof structure is formed, and the dustproof effect is improved. And the coil holder body is thinner, so that the number of the silicon steel sheets can be increased, the efficiency of the fan is improved, the heat productivity and the temperature rise are reduced, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, and in particular to a fan / fan used for heat dissipation in products such as new energy vehicles, energy storage facilities, industrial equipment, servers, smart devices, and computer cases. Background Technology

[0002] Fans (or blowers) are used in many products, such as industrial equipment, charging stations, computer cases, and home appliances, primarily for heat dissipation. A fan generally consists of a fan frame, fan blades, a motor assembly, and a PCB board. The fan blades are mounted on the motor assembly, and the motor assembly, along with the fan blades, is mounted on the stator of the fan frame via a shaft. However, existing fans typically have the following drawbacks: First, after the fan blades are installed in the fan frame, the shaft is mounted on the stator tube via bearings, and the stator tube is covered by the motor housing. To prevent interference caused by the motor housing colliding with the stator tube during operation, a relatively large gap, typically several millimeters, needs to be left between the motor housing and the stator tube. This gap allows dust, water, and other impurities to enter the fan, and the bearing cover alone is insufficient to prevent this, thus affecting the fan's lifespan. Second, the thickness of the motor assembly's coil frame in these fans is generally quite large; for example, the 8038 fan typically has a coil frame thickness of around 3mm, and the number of silicon steel sheets is generally around 40, which negatively impacts its heat dissipation performance. Although there are currently solutions that use vacuum coating on silicon steel sheets to protect enameled wires, vacuum coating is expensive and the film is easily scratched, so the assembly process requires high precision. Utility Model Content

[0003] This invention addresses the shortcomings of existing technologies by providing a fan with a dual dustproof structure that is simple in structure, more rationally designed, and provides better protection.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: A fan with a double dustproof structure includes a fan frame, fan blades, and a motor assembly. The fan blades are mounted on the stator seat of the fan frame through the shaft of the motor assembly to form a rotatable structure. The shaft is inserted into the middle tube of the stator seat through a bearing. The silicon steel sheet of the motor assembly is mounted on the middle tube together with the wire frame. The key feature is that: a raised wire frame tube is provided at the center of the wire frame, and the inner diameter of the wire frame tube is larger than the outer diameter of the middle tube; a sealing ring is provided in the wire frame tube, the sealing ring covers the top of the middle tube and has a gap of 0.01-0.03mm between the sealing ring and the top of the middle tube, and the outer diameter of the sealing ring is 0.01-0.03mm smaller than the inner diameter of the wire frame tube, so that the sealing ring is installed in the wire frame tube but does not contact the wire frame tube; the silicon steel sheet extends inward to contact the middle tube to form a ring of bosses that protrude inward relative to the wire frame tube, and the gap between the wire frame and the middle tube is sealed by the bosses.

[0005] Furthermore, the sealing ring protrudes slightly outside the wire frame tube to create a gap between the motor housing and the top of the wire frame tube.

[0006] Furthermore, the sealing ring is fixed on the shaft core and can be attached to the inner surface of the motor housing.

[0007] Furthermore, the top end of the middle tube extends partially into the inner hole of the wire frame tube, so that there is a gap between the sealing ring and the boss, and the height of the gap is greater than the height of the gap between the sealing ring and the middle tube.

[0008] Furthermore, the bearing is positioned near the top of the central tube, and a sealing cap is provided on the bearing to cover the gap between the bearing and the shaft core, with a sealing ring pressing against the sealing cap.

[0009] Furthermore, the thickness of the wire frame body is 1-2mm, such as 1.5mm, so that the thickness of the upper and lower wire frames together can be reduced by more than 2mm.

[0010] This invention utilizes a wire frame tube with a large aperture within the wire frame, and a sealing ring within the wire frame tube to cover the end of the central tube, along with a boss to seal the motor interior. This creates a double dustproof structure, effectively preventing dust, oil, and other external impurities from entering the motor and increasing the fan's lifespan. Furthermore, by making the wire frame thinner, the number of silicon steel sheets can be increased, thereby improving fan efficiency, reducing heat generation and temperature rise, and extending service life. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic cross-sectional view of the present invention.

[0013] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0014] Figure 4 This is a diagram of the internal structure of this utility model;

[0015] Figure 5 This is a diagram of the internal structure of the motor housing.

[0016] In the diagram, 1 is the fan frame, 2 is the fan blade, 3 is the motor housing, 31 is the shaft core, 4 is the stator base, 41 is the middle tube, 5 is the wire frame, 51 is the wire frame body, 52 is the wire frame tube, 6 is the sealing ring, 7 is the silicon steel sheet, 8 is the boss, 9 is the bearing, and 10 is the sealing cover. Detailed Implementation

[0017] In this embodiment, refer to Figures 1-5The fan with a dual dustproof structure includes a fan frame 1, fan blades 2, a PCB board, and a motor assembly. The fan blades 2 are mounted on the stator seat 4 of the fan frame 1 via the shaft core 31 of the motor assembly to form a rotatable structure. The shaft core 31 is inserted into the middle tube 41 of the stator seat 4 via a bearing 9. The silicon steel sheet 7 of the motor assembly is mounted on the middle tube 41 together with the wire frame 5. A protruding wire frame tube 52 is provided at the center of the wire frame 5. The inner diameter of the wire frame tube 52 is larger than the outer diameter of the middle tube 41. A sealing ring 6 is provided in the wire frame tube 52. The sealing ring 6 covers the top of the middle tube 41 and the gap between the sealing ring 6 and the top of the middle tube 41 is 0.01-0.03mm, for example, 0.02mm, so that they do not come into contact with each other. The outer diameter of the sealing ring 6 is 0.01-0.03mm smaller than the inner diameter of the wire frame tube 52. Taking the 8038 type fan as an example, the inner diameter of the wire frame tube 52 can be set to 5mm, and the outer diameter of the sealing ring 6 can be set to 4.98mm, so that the sealing ring 6 is installed inside the wire frame tube 52 without contacting the wire frame tube 52, thus forming the first layer of dustproof structure. The silicon steel sheet 7 extends inward to contact the middle tube 41 to form a ring of bosses 8 that protrude inward relative to the wire frame tube 52. The gap between the wire frame 5 and the middle tube 41 is sealed by the bosses 8, forming the second layer of dustproof structure together with the protective part of the bearing 9.

[0018] The sealing ring 6 protrudes outside the wire frame tube 52 to create a gap of approximately 1-2 mm between the motor housing 3 and the top of the wire frame tube 52.

[0019] The sealing ring 6 is fixed on the shaft core 31 and is attached to the inner surface of the motor housing 3 to prevent dust from entering through gaps.

[0020] The top end of the middle tube 41 extends into the inner hole of the wire frame tube 52, so that there is a gap between the sealing ring 6 and the boss 8, and the height of the gap is greater than the height of the gap between the sealing ring 6 and the middle tube 41, which helps the silicon steel sheet 7 to dissipate heat.

[0021] The bearing 9 is located near the top of the middle tube 41. A sealing cover 10 is provided on the bearing 9 to cover the gap between the bearing 9 and the shaft core 31, forming a protective part of the bearing. The sealing ring 6 is pressed on the sealing cover 10 to further improve the dustproof effect.

[0022] The thickness of the wire frame 51 is 1-2mm, for example, 1.5mm, so the thickness of the upper and lower wire frames can be reduced by more than 2mm. For the 8038 type fan, the number of silicon steel sheets 7 can be increased from about 40 to 45, an increase of about 10%, which theoretically can improve efficiency by about 10% or reduce heat generation by 10%.

[0023] The present invention has been described in detail above. The above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of this application should still fall within the scope of the present invention.

Claims

1. A fan with a dual dustproof structure, comprising a fan frame, fan blades, and a motor assembly, wherein the fan blades are mounted on a stator seat of the fan frame via a shaft of the motor assembly to form a rotatable structure, the shaft is inserted into a central tube of the stator seat via bearings, and the silicon steel sheets of the motor assembly, together with the coil frame, are mounted on the central tube, characterized in that: A raised wire frame tube is provided at the center of the wire frame, and the inner diameter of the wire frame tube is larger than the outer diameter of the middle tube. A sealing ring is provided in the wire frame tube, which covers the top of the middle tube and has a gap of 0.01-0.03mm between the sealing ring and the top of the middle tube. The outer diameter of the sealing ring is 0.01-0.03mm smaller than the inner diameter of the wire frame tube, so that the sealing ring is installed inside the wire frame tube but does not contact the wire frame tube. A silicon steel sheet extends inward to contact the middle tube to form a ring of bosses that protrude inward relative to the wire frame tube. The gap between the wire frame and the middle tube is sealed by the bosses.

2. The fan with a dual dustproof structure according to claim 1, characterized in that: The sealing ring protrudes outside the wire frame tube to create a gap between the motor housing and the top of the wire frame tube.

3. The fan with a dual dustproof structure according to claim 1, characterized in that: The sealing ring is fixed on the shaft core and is attached to the inner surface of the motor housing.

4. The fan with a dual dustproof structure according to claim 1, characterized in that: The top end of the middle tube extends partially into the inner hole of the wire frame tube, so that there is a gap between the sealing ring and the boss, and the height of the gap is greater than the height of the gap between the sealing ring and the middle tube.

5. The fan with a dual dustproof structure according to claim 1, characterized in that: The bearing is located near the top of the middle tube, and a sealing cap is provided on the bearing to cover the gap between the bearing and the shaft core, with a sealing ring pressing on the sealing cap.

6. The fan with a dual dustproof structure according to claim 1, characterized in that: The thickness of the wire frame is 1-2mm.

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