Highly universal low-cost heat dissipation fan copper middle tube

Abstract

The utility model relates to a high general low cost type heat dissipation fan copper middle pipe, is in connection with the problem of solving the metal middle pipe structure design of the existing similar product is poor and leads to the structure design and processing technology complex, the low general property, the high production cost. The body of the heat dissipation fan copper middle pipe is the copper middle pipe that presents the cylinder, one end that body and fan frame integrative injection molding is equipped with the rubber coating step ring that is greater than pipe department circumference surface diameter, and one side of rubber coating step ring is equipped with the flat key edge, its key points are that the injection molding hole of glue passing is arranged equidistance and is close to the rubber coating step ring at the circumference surface one end of the pipe department of body, and injection molding only needs to adjust the rubber coating step ring of body in the inside position of fan frame, and the inside diameter orifice of rubber coating step ring place is lower than the fan frame orifice of this end of body, and the injection molding hole of glue passing of body is formed the inside step position of fan frame that plastic penetrates and covers the injection molding hole of glue passing of body, and the inside wall of injection molding hole of glue passing of body is equipped with the middle inwards taper convex, and through the center inner cover of injection molding hole of glue passing and fan frame integrative injection molding.

Description

Technical Field

[0001] This utility model relates to the middle tube of a cooling fan, which is a highly versatile and low-cost copper middle tube for cooling fans. Background Technology

[0002] Cooling fans generally refer to fans used for cooling motherboard devices such as CPUs and graphics cards. With the advancement of technology and the development of equipment, cooling fans are increasingly widely used in electronic products. As the equipment installed in electronic products becomes increasingly sophisticated, cooling fans are widely used in servers and other similar devices. Furthermore, due to the high heat output and dense component density of servers, the cooling fans used are mostly high-speed fans. High-speed fans generate significant motor heat and vibration during operation. To ensure the stable operation of these products, the requirements for motor temperature rise, structural strength, and vibration control of cooling fans are becoming increasingly stringent. Some existing cooling fans use a die-cast, one-piece metal tube base, which is then integrally molded with a plastic fan frame through rubber coating; for example, the Chinese patent document CN213116859U, authorized on May 4, 2021, entitled "New Metal Tube Fan". However, the steps of the above products and similar conventional metal tubes are fixed, and after processing, they can usually only be used in a single fan frame or a fan frame of the same specification, resulting in low versatility. Therefore, each manufacturer generally has a variety of tube specifications internally. Summary of the Invention

[0003] To overcome the above shortcomings, the purpose of this utility model is to provide a highly versatile and low-cost copper central tube for cooling fans, thereby solving the technical problems of poor metal central tube structural design in existing similar products, which leads to complex structural design and processing technology, low versatility, and high production costs. This objective is achieved through the following technical solution.

[0004] A high-performance, low-cost copper tube for a cooling fan is disclosed. The main body of the copper tube is cylindrical, and one end of the main body and the fan frame is integrally injection molded. A rubber-coated stepped ring larger than the diameter of the tube's circumference is provided at one end of the rubber-coated stepped ring. A flat key edge is provided on one side of the rubber-coated stepped ring. The key structural design feature is that injection molding holes are equidistantly spaced on the circumference of one end of the rubber-coated stepped ring at the tube portion of the main body. During integral injection molding of the main body and the fan frame, the position of the rubber-coated stepped ring inside the fan frame is adjusted so that the inner diameter of the rubber-coated stepped ring is lower than the fan frame opening at that end of the main body. Plastic penetrates and covers the injection molding holes higher than the main body, forming the internal stepped position of the fan frame. The main body and the fan frame are integrally injection molded.

[0005] The distance L1 from the injection molding through hole of the main body to one end of the rubber-coated stepped ring is less than the distance L2 from the injection molding through hole to the other end of the main body.

[0006] The injection molding holes of the body are arranged in pairs at equal intervals, and the angle between the flat key edge of the rubber-coated stepped ring and the injection molding hole is 45 degrees.

[0007] The inner wall of the injection molding through hole of the main body is provided with a tapered protrusion in the middle, and a central inner sleeve is integrally injection molded with the fan frame through the injection molding through hole. The shaft core at the center of the motor housing inside the fan blade hub is inserted into the central inner sleeve of the fan frame. The diameter of the protrusion of the central inner sleeve is larger than the shaft diameter of the shaft core. Bearings are respectively provided at both ends of the central inner sleeve and at both ends of the outer diameter of the shaft core in the main body.

[0008] This utility model has a reasonable and simple structural design, simple processing technology, good stability, high versatility, low production cost, and long service life; it is suitable for use in copper tube cooling fans with high versatility and low cost, and for further improvements to similar products. Attached Figure Description

[0009] Figure 1 This is a cross-sectional view of the structure of this utility model in its usage state.

[0010] Figure 2 yes Figure 1 A schematic diagram of the three-dimensional structure of the main body.

[0011] Figure 3 yes Figure 2 A top-view structural diagram.

[0012] Figure 4 yes Figure 3 A cross-sectional structural diagram.

[0013] The attached figures are numbered and named as follows: 1. Body, 101. Rubber-coated stepped ring, 102. Injection molding through hole, 2. Fan frame, 201. Central inner sleeve, 3. Fan blade, 4. Shaft core, 5. Bearing. Implementation

[0014] The structure and use of this utility model will now be further described with reference to the accompanying drawings. Figures 1-4As shown, the body 1 of the copper tube of the cooling fan is a cylindrical copper tube. One end of the body and fan frame 2 is integrally injection molded and has a rubber-coated stepped ring 101 larger than the circumferential diameter of the tube. A flat key edge is provided on one side of the rubber-coated stepped ring. Injection molding holes 102 are equidistantly spaced on the circumferential surface of one end of the rubber-coated stepped ring at the tube portion of the body. When the body and fan frame are integrally injection molded, the position of the rubber-coated stepped ring inside the fan frame is adjusted so that the inner diameter of the hole at the rubber-coated stepped ring is lower than the opening of the fan frame at that end of the body. Plastic penetrates and covers the injection molding holes higher than the body, forming the internal stepped position of the fan frame. The body and fan frame are integrally injection molded. The distance L1 from the injection molding hole to one end of the rubber-coated stepped ring is less than the distance L2 from the injection molding hole to the opening at the other end of the body; that is, the injection molding hole is located near the end of the rubber-coated stepped ring. The injection molding holes of the body are arranged in pairs at equal intervals, and the angle between the flat key edge of the rubber-coated stepped ring and the injection molding hole is 45 degrees.

[0015] Meanwhile, the inner wall of the injection molding hole of the aforementioned body is provided with a centrally tapered protrusion, and a central inner sleeve 201 is integrally injection molded with the fan frame through the injection molding hole. The shaft core 4 at the center of the motor housing inside the hub of the fan blade 3 is inserted into the central inner sleeve of the fan frame. The diameter of the protrusion of the central inner sleeve is larger than the diameter of the shaft part of the shaft core. Bearings 5 ​​are respectively provided at both ends of the stepped grooves of the central inner sleeve and at both ends of the outer diameter of the shaft core. Furthermore, according to the prior art, the end of the aforementioned shaft core is provided with a retaining spring, and springs or seals are respectively provided on the outer diameters of the bearings at both ends.

[0016] The advantages of this copper central tube for cooling fans are as follows: 1. High versatility, usable in various fan frame sizes; 2. Simple processing technology, convenient inspection, and low processing cost. This copper central tube for cooling fans achieves cost reduction and reduces the number of component parts. The copper central tube is optimized by processing it into a through-hole and side-wall perforated style, making the new structure more advantageous in all aspects and simpler in structure. Therefore, the new structure copper central tube has a through-hole in the center, allowing adjustment of the internal step position during fan frame injection molding, resulting in high versatility and applicability to various fan frame sizes.

[0017] In summary, the new copper tube structure is simpler overall than the conventional tube structure, requiring fewer dimensions to be controlled. From processing technology to dimensional inspection and quality control, the new copper tube structure has significant advantages. Furthermore, when processing the conventional and new copper tube structures using the same equipment, the new structure copper tube is also cheaper.

Claims

1. A high-performance, low-cost copper tube for a cooling fan, wherein the body (1) of the copper tube is a cylindrical copper tube, and one end of the body and the fan frame (2) are integrally injection molded and provided with a rubber-coated stepped ring (101) larger than the diameter of the tube circumference, and one side of the rubber-coated stepped ring is provided with a flat key edge; characterized in that The tube portion of the main body (1) has a rubber-coated step ring (101) with injection molding holes (102) at equal intervals on one end of its circumference. When the main body and the fan frame (2) are integrally injection molded, the position of the rubber-coated step ring of the main body inside the fan frame is adjusted. The inner diameter of the rubber-coated step ring of the main body is lower than the fan frame opening at that end of the main body. The plastic penetrates and covers the injection molding hole higher than the main body to form the internal step position of the fan frame. The main body and the fan frame are integrally injection molded.

2. The high-versatility, low-cost cooling fan copper tube according to claim 1, characterized in that... The distance L1 from the injection molding through hole (102) of the body (1) to one end of the rubber-coated step ring (101) is less than the distance L2 from the injection molding through hole to the other end of the body.

3. The high-versatility, low-cost cooling fan copper tube according to claim 2, characterized in that... The injection molding through holes (102) of the body (1) are arranged in pairs at equal intervals, and the angle between the flat key edge of the rubber-coated step ring (101) and the injection molding through hole is 45 degrees.

4. The high-versatility, low-cost cooling fan copper tube according to claim 1, characterized in that... The inner wall of the body (1) at the injection molding through hole (102) is provided with a tapered protrusion in the middle, and a central inner sleeve (201) is integrally injection molded with the fan frame (2) through the injection molding through hole. The shaft core (4) at the center of the inner motor housing of the fan blade (3) is inserted into the central inner sleeve of the fan frame. The diameter of the protrusion of the central inner sleeve is larger than the diameter of the shaft part of the shaft core. The stepped grooves at both ends of the central inner sleeve and the outer diameter of the shaft core in the body are respectively provided with bearings (5).

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