Vacuum-coated wiring structure for heat-dissipation fan motor

Abstract

The utility model relates to a kind of vacuum coating wiring structure of radiating fan motor, it is to solve the technical problem of the more complex waterproof structure design of existing similar products, higher production cost, the less corresponding hole position of PCBA board is removed by PCBA board coating after point gluing forming.It is that the motor assembly of the radiating fan is provided with coating layer on the outer diameter of PCBA board, PCBA board side is provided with the wire welding hole of PCBA board coating after point gluing removal molding, the wire of coil PCBA board side is provided with wire frame extension, lead wire and wire connection place are provided with point gluing;PCBA board is provided with the first to third PIN hole of PCBA board coating after point gluing removal molding, coil is provided with PIN needle of wire frame extension, PIN needle extension PCBA board corresponding PIN hole, and fixed to PCBA board by point gluing, PCBA board and wire frame are integrated;The outer diameter of PCBA board, wire frame and coil is provided with coating layer.

Description

Technical Field

[0001] This utility model relates to a cooling fan, specifically a vacuum coating wiring structure for a cooling fan motor. Background Technology

[0002] Cooling fans generally refer to fans used to cool motherboard devices such as CPUs and graphics cards. Some cooling fans also have heat sinks. Their main purpose is to conduct heat away and blow it into the surrounding air to achieve a cooling effect. However, as customers' performance requirements for cooling fans continue to increase, the IP rating requirements for the internal motors of cooling fans are also becoming higher. Therefore, dustproof and waterproof designs for the internal motors of cooling fans are necessary. Currently, the dustproof and waterproof process in the cooling fan industry generally uses conformal coating, and the entire motor assembly undergoes processes such as vacuum coating, encapsulation, and potting. For example, Chinese patent application number 201921281858.4, authorized on June 16, 2020, utility model title "Coated Rust-proof Silicon Steel Sheet for Cooling Fan". However, since the coating unit price is charged by volume, the above production cost is relatively high, and the processing technology is relatively complex. At the same time, the coating layer is prone to breakage due to collisions during the transportation of the entire motor, resulting in poor protective effect. Furthermore, existing cooling fan PCBA boards, formed by cutting and applying adhesive after coating, have relatively few holes. Summary of the Invention

[0003] To overcome the above shortcomings, the purpose of this utility model is to provide a vacuum-coated wiring structure for a cooling fan motor, thereby solving the technical problems of complex waterproof structure design, high production cost, and limited corresponding holes on the PCBA board that require cutting and dispensing adhesive after coating the PCBA board. This objective is achieved through the following technical solution.

[0004] A vacuum-coated wiring structure for a cooling fan motor is disclosed. The cooling fan has fan blades within its fan frame, and a motor assembly is fixedly mounted on the outer diameter of a copper tube within the fan frame. A rotating shaft is located at the center of a hub within the fan blades. One end of the rotating shaft is inserted into the copper tube within the fan frame. Bearings are located at both ends of the rotating shaft within the copper tube. A magnetic coil within the fan blades is positioned opposite the coil of the motor assembly. The key design feature is that the outer diameter of the PCBA board of the motor assembly is coated. One side of the PCBA board has soldering holes for wires, which are cut and glued after coating. The coil has wires extending from the wire frame on one side of the PCBA board. Glue is applied at the connection points between the leads and the wires. Thus, the first, second, and third PIN holes and the soldering holes on the PCBA board are sealed with glue before coating and opened after coating for use in factory wiring. During factory wiring, the leads are further secured by glue after connecting to the wires on the wire frame.

[0005] The PCBA board has a first PIN hole, a second PIN hole, and a third PIN hole formed by dispensing adhesive after the PCBA board is coated. The coil has PIN pins extending out of the wire frame. The PIN pins extend out of the first PIN hole, the second PIN hole, and the third PIN hole on the PCBA board and are fixed to the PCBA board by dispensing adhesive, thus integrating the PCBA board and the wire frame. The above-mentioned method of fixing the PIN pins of the wire frame to the PIN holes of the PCBA board by dispensing adhesive further waterproofs and seals the PIN holes of the PCBA board.

[0006] The wires of the wire frame are located inside the terminal blocks of the wire frame. The terminal blocks extend out of the wire soldering holes on the PCBA board. One side of the terminal block has an outward opening. One end of the lead wire is inserted into the opening of the terminal block and connects to the wire inside the terminal block. Adhesive is applied to the opening on one side of the terminal block where the lead wire connects to the wire. This facilitates quick connection between the lead wire and the wire via the terminal block and subsequent fixation with adhesive.

[0007] The outer diameter of the PCBA board, wire frame, and coil is coated with a film layer. That is, after the wiring is completed and the motor assembly of the cooling fan is fixed with adhesive, the entire assembly is covered with the film layer.

[0008] The inner wall of the inner hub of the fan blade is provided with a motor housing. The other end of the fan blade's rotation shaft is fixed to the fan blade and the motor housing via a bushing. A magnetic ring is fixedly provided on the inner wall of the motor housing. A fixed coil is provided on the outer diameter of the copper tube. The coil is fixedly mounted on the wire frame of the PCBA board. The above is a specific structure of the fan blade and motor assembly in one embodiment.

[0009] This utility model has a reasonable structural design, good dustproof and waterproof effect, good stability, long service life, low production cost, and feasible processing technology; it is suitable for use as a cooling fan with high dustproof and waterproof requirements, and for further improvement of the structure of similar products. Attached Figure Description

[0010] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present invention.

[0011] Figure 2 This is a schematic diagram of the PCBA board structure of this utility model, with part A defined in the diagram.

[0012] Figure 3 yes Figure 2 Enlarged view of part A.

[0013] Figure 4 yes Figure 2 The diagram shows the wiring structure after glue application on the PCBA board. The dotted lines in the diagram represent glue application at the PIN pins.

[0014] Attached Figure Numbers and Names: 1. Fan Blade, 2. Fan Frame, 3. PCBA Board, 301. First PIN Hole, 302. Second PIN Hole, 303. Third PIN Hole, 304. Wire Soldering Hole, 4. Wire Frame, 5. Motor Housing, 6. Magnetic Coil, 7. Coil, 8. Copper Tube, 9. Rotating Shaft, 10. Bushing, 11. Bearing, 12. Terminal Block, 13. Lead Wire, 14. PIN Pin. Implementation

[0015] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figures 1-4 As shown, the cooling fan has a fan blade 1 inside the fan frame 2. A motor assembly is fixedly mounted on the outer diameter of the copper tube 8 of the fan frame. A rotating shaft 9 is located at the center of the hub inside the fan blade. One end of the rotating shaft of the fan blade is inserted into the copper tube inside the fan frame. Bearings 11 are respectively provided at both ends of the rotating shaft inside the copper tube. A motor housing 5 is provided on the inner wall of the hub inside the fan blade. The other end of the rotating shaft 9 of the fan blade is fixed to the fan blade and the motor housing through a bushing 10. A magnetic ring 6 is fixedly mounted on the inner wall of the motor housing. A fixed coil 7 is provided on the outer diameter of the copper tube. The coil is fixedly mounted on the wire frame 4 of the PCBA board 3. The magnetic ring inside the fan blade is positioned opposite to the coil of the motor assembly. The aforementioned motor assembly's PCBA board has a wire soldering hole 304 on one side, formed by cutting and applying adhesive after the PCBA board is coated. The PCBA board also has a first PIN hole 301, a second PIN hole 302, and a third PIN hole 303, formed by cutting and applying adhesive after the PCBA board is coated. The coil's PCBA board side has a wire extending from the wire frame. The wire is located within the wire frame's terminal block 12, which extends out of the PCBA board's wire soldering hole. One side of the terminal block has an outward opening. One end of a lead wire 13 is inserted into the terminal block's opening and connects to the wire inside the terminal block. Adhesive is applied to the opening on the terminal block side where the lead wire connects to the wire. The coil has a PIN pin 14 extending from the wire frame. The PIN pin extends from the first, second, and third PIN holes on the PCBA board and is fixed to the PCBA board by adhesive application. The PCBA board and the wire frame are integrated. Before being installed into the wire frame, the outer diameter of the PCBA board has a coating layer.

[0016] This structure primarily addresses the overall coating of motor components in existing similar products. Before coating the PCBA board, the first, second, and third PIN holes, as well as the wire soldering holes, are plugged with adhesive. After coating, the wire soldering holes and PIN holes are cut out using CO2 cutting for soldering the PIN pins extending from the holes and the wires inside the terminals at the soldering holes. After soldering, a high-sealing adhesive such as UV glue is used to fix and seal the PIN pins and wires in the PIN holes and wire soldering holes. This structure offers low manufacturing costs, strong frame compatibility, and facilitates product quality assurance during transportation.

[0017] In summary, this structure represents a novel vacuum coating wiring process for motors. It requires only coating the PCBA board separately, applying adhesive to the PIN holes and wire soldering holes on the PCBA board, and then cutting and opening the corresponding PIN holes and wire soldering holes after coating. Once the motor assembly returns to the factory, the PIN pins and wires are soldered, and adhesive is applied again to seal and fix the PIN holes and wire soldering points. The aforementioned coating unit price is charged by volume; this solution effectively reduces the coating volume, thereby lowering production costs. Furthermore, since collisions during motor transportation can easily cause the coating layer to crack, resulting in poor protective performance, this solution only requires wrapping the PCBA board, effectively preventing collisions between the coating layer and the metal, ensuring protective effectiveness, and also guaranteeing the commonality of the copper core tube.

Claims

1. A vacuum coating wiring structure for a cooling fan motor, wherein the cooling fan has a fan blade (1) inside a fan frame (2), a motor assembly is fixedly mounted on the outer diameter of a copper tube (8) of the fan frame, a rotating shaft (9) is mounted at the center of the hub inside the fan blade, one end of the rotating shaft of the fan blade is inserted into the copper tube inside the fan frame, bearings (11) are respectively mounted on both ends of the rotating shaft inside the copper tube, and a magnetic ring (6) inside the fan blade is arranged opposite to the coil (7) of the motor assembly; characterized in that The outer diameter of the PCBA board (3) of the motor assembly is provided with a coating layer. One side of the PCBA board (3) is provided with a wire welding hole (304) formed by cutting and dispensing adhesive after the PCBA board coating is applied. One side of the PCBA board of the coil (7) is provided with a wire extending out of the wire frame (4). The connection between the lead wire (13) and the wire is provided with adhesive.

2. The vacuum coating wiring structure for the cooling fan motor according to claim 1, characterized in that... The PCBA board (3) is provided with a first PIN hole (301), a second PIN hole (302) and a third PIN hole (303) formed by cutting and dispensing adhesive after the PCBA board is coated. The coil (7) is provided with a PIN pin (14) extending out of the wire frame (4). The PIN pin extends out of the first PIN hole, the second PIN hole and the third PIN hole of the PCBA board and is fixed to the PCBA board by dispensing adhesive. The PCBA board and the wire frame are integrated.

3. The vacuum coating wiring structure for the cooling fan motor according to claim 2, characterized in that... The wires of the wire frame (4) are located inside the wiring terminal (12) of the wire frame. The wiring terminal extends out of the wire soldering hole of the PCBA board (3). One side of the wiring terminal has an outward opening. One end of the lead wire (13) is inserted into the opening of the wiring terminal and connected to the wire inside the wiring terminal. Adhesive is applied to the opening on one side of the wiring terminal where the lead wire connects to the wire.

4. The vacuum coating wiring structure for the cooling fan motor according to claim 2, characterized in that... The outer diameter of the PCBA board (3), the wire frame (4) and the coil (7) is coated with a film layer.

5. The vacuum coating wiring structure for the cooling fan motor according to claim 1, characterized in that... The inner wall of the inner hub of the fan blade (1) is provided with a motor housing (5). The other end of the rotating shaft (9) of the fan blade is fixed to the fan blade and the motor housing through a bushing (10). A magnetic ring (6) is fixedly provided on the inner wall of the motor housing. A fixed coil (7) is provided on the outer diameter of the copper tube (8). The coil is fixedly set on the wire frame (4) of the PCBA board (3).

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