Counter-rotating fan convenient to assemble

Abstract

The utility model relates to a contra-rotating fan convenient to assemble. The contra-rotating fan is designed for solving the technical problems that in existing like products, a wire penetrates through a frame to be welded, a winding assembly and a circuit board are not easy to fix, and automatic production cannot be conducted. The counter-rotating fan is characterized in that circuit board grooves are formed in check block areas in the middles of grids on the counter-rotating connection sides of the first fan frame body and the second fan frame body of the counter-rotating fan respectively, and notches communicated with wire grooves in the outer frames of the first fan frame body and the second fan frame body are formed in one sides of the circuit board grooves respectively; the first circuit board and the second circuit board are arranged in the circuit board grooves of the first fan frame body and the second fan frame body respectively, a partition plate is arranged at a groove opening of the circuit board groove on one side, and circuits of wires are connected with the first circuit board and the second circuit board in the circuit board grooves through wire grooves and notches of the first fan frame body and the second fan frame body respectively. PINs at the first winding assembly and the second winding assembly are welded to PIN holes in the second circuit board through first fixing holes in the bottoms in the first circuit board grooves of the first fan frame body and the second fan frame body respectively.

Description

Technical Field

[0001] The utility model relates to a cooling fan applied to server equipment, and is a contra-rotating fan convenient for assembly. Background Art

[0002] The cooling fan generally mainly refers to a fan used for cooling main board devices such as CPU and graphics card. Its main purpose is to conduct heat out and blow it into the nearby air to achieve the cooling effect. Some of the cooling fans are applied to electrical cabinets or industrial equipment cabinets. At present, the cooling fans applied to server equipment on the market cause the internal temperature of the server to rise due to a large amount of heat generated by multiple working modules in the server, which is not conducive to the long-term temperature operation of the server modules; generally, the cooling fan is used to drive air circulation to reduce the internal temperature of the server. Due to the dense working modules and large resistance, it is difficult for the existing cooling fans to overcome the resistance, resulting in poor cooling ability. The existing server cooling fans basically use contra-rotating fans to dissipate heat. Such contra-rotating fans are almost the same as the structure of single fans. The assembly steps are as follows: the wire heads, wire tails and empty PIN pins in the winding assembly are respectively welded and fixed to the corresponding holes on the circuit board to form a motor assembly, the wires are respectively welded, and then the whole motor assembly is glued into the fan housing, and then the fan blade assembly is used to assemble two single finished fans respectively. The two single fans are fixed with screws or special buckles to form the final contra-rotating fan; however, such an assembly method has many problems. For example, the application number disclosed in the Chinese patent document is 201821589150.0, the authorization announcement date is 2019.07.09, and the utility model name is "Outer frame cover of contra-rotating series cooling fan"; another example is the application number disclosed in the Chinese patent document is 201811581319.2, the application publication date is 2019.05.10, and the invention name is "Combined cooling fan"; but the above-mentioned contra-rotating fans and similar products have the following problems: 1. The production efficiency is reduced. Because the contra-rotating fan of the server has only one wire, and the wire needs to be welded on two circuit boards, resulting in a very large plastic shell of the wire, which cannot pass through the fan housing; therefore, the wire can only be welded through the housing, which greatly affects the production efficiency; 2. It is not easy to fix the winding assembly and the circuit board. Because the heat dissipation requirement of the server is very high, the diameter of the enameled wire used in the winding assembly of the contra-rotating fan will be very large, and the PIN pin and the enameled wire need to be manually inserted into the corresponding holes on the circuit board; 3. The production cost is too high. Due to the problems of 1 and 2 above, it is easy to cause the contra-rotating fan to be unable to be introduced into automated production, resulting in too high production cost. Summary of the Invention

[0003] To overcome the above deficiencies, the purpose of the utility model is to provide a contra-rotating fan convenient for assembly to the art, so as to solve the technical problems of wire passing through the housing for welding, poor fixing of the winding assembly and the circuit board, and inability to introduce automated production in existing similar products. Its purpose is achieved through the following technical solutions.

[0004] A contra-rotating fan that is convenient for assembly. The fan housing one and the fan housing two of the contra-rotating fan are respectively square. One side of the fan housing one and the fan housing two that are connected is rotatably connected into one body through corresponding fixing holes and buckles at the end corners. Mounting holes are respectively provided at the end corners of the other sides of the fan housing one and the fan housing two. An inductor assembly one is fixedly provided on the outer diameter of the middle tube one in the fan housing one. The inner shaft core of the fan blade assembly one is sleeved into the middle tube one of the fan housing one. An inductor assembly two is fixedly provided on the outer diameter of the middle tube two in the fan housing two. The inner shaft core of the fan blade assembly two is sleeved into the middle tube two of the fan housing two. The key point of the structural design is that circuit board grooves are respectively provided at the middle block areas of the grids on the side of the contra-rotating connection between the fan housing one and the fan housing two. Notches communicating with the wire grooves at the outer frames of the fan housing one and the fan housing two are respectively provided on one side of the inner slot openings of the circuit board grooves of the fan housing one and the fan housing two. The circuit board one and the circuit board two are respectively arranged in the circuit board grooves of the fan housing one and the fan housing two. A partition is provided at the slot opening of one side circuit board groove. The circuits of the wires are respectively connected to the circuit board one and the circuit board two in the circuit board groove through the wire grooves and notches of the fan housing one and the fan housing two. The PIN pins at the inductor assembly one and the inductor assembly two are respectively welded to the PIN holes of the circuit board two through a fixing hole at the bottom of the circuit board grooves in the fan housing one and the fan housing two. The circuit board one and the circuit board two are respectively provided with electronic components one and electronic components two.

[0005] The circuit board one and the circuit board two are respectively provided with three PIN holes, which respectively correspond to the PIN pins of the inductor assembly one and the inductor assembly two, and respectively correspond to the wire ends of the enameled wires of the inductor assembly one and the inductor assembly two.

[0006] The circuits of the wires are respectively welded to the pad one and the pad two of the circuit board one and the circuit board two.

[0007] At least one side of the partition is provided with a positioning post one and a positioning post two. The positioning post one and the positioning post two of the partition are respectively inserted into another corresponding fixing hole in the slot opening of the circuit board groove on one side of the fan housing one or the fan housing two.

[0008] An anti-reverse rib is provided at the end of the column body of the buckle of the fan housing two. Openings are respectively provided at the inner side of the end corners on one side of the central hole in the column body.

[0009] The structural design of the present utility model is reasonable, which is convenient for automatic production, has high production efficiency and low production cost. Especially, the wiring of the PIN pins is convenient during the automatic production process. It is suitable for use as a contra-rotating fan for a series-connected fan housing, and for the structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is an exploded structural schematic diagram of an embodiment of the present utility model.

[0011] Figure 2Yes Figure 1 Exploded enlarged structural schematic diagram of the bottom of one side of the fan housing

[0012] Figure 3 Yes Figure 1 Exploded enlarged structural schematic diagram of the side of the second fan housing

[0013] Figure 4 Yes Figure 1 Schematic cross-sectional structure diagram after assembly

[0014] Figure 5 Yes Figure 4 Schematic diagram of the wire connection structure

[0015] Figure 6 Yes Figure 1 Schematic three-dimensional structure diagram of the first fan housing

[0016] Figure 7 Yes Figure 1 Schematic three-dimensional structure diagram of the second fan housing

[0017] Reference numerals and names of the drawings: 1. First fan housing, 101. First middle tube, 102. First fixing hole, 103. Second fixing hole, 104. Third fixing hole, 105. Fourth fixing hole, 106. Fifth fixing hole, 107. Sixth fixing hole, 108. Seventh fixing hole, 109. Eighth fixing hole, 110. Ninth fixing hole, 2. Second fan housing, 201. Second middle tube, 202. First buckle, 203. Second buckle, 204. Third buckle, 205. Fourth buckle, 206. Tenth fixing hole, 207. Eleventh fixing hole, 208. Twelfth fixing hole, 3. First winding assembly, 301. First silicon steel sheet, 302. First upper insulating frame, 303. First lower insulating frame, 3031. First PIN pin, 3032. Second PIN pin, 3033. Third PIN pin, 304. First enameled wire, 4. Second winding assembly, 401. Second silicon steel sheet, 402. Second upper insulating frame, 403. Second lower insulating frame, 4031. Fourth PIN pin, 4032. Fifth PIN pin, 4033. Sixth PIN pin, 404. Second enameled wire, 5. First circuit board, 501. First PIN hole, 502. Second PIN hole, 503. Third PIN hole, 504. First solder pad, 505. First electronic component, 6. Second circuit board, 601. Fourth PIN hole, 602. Fifth PIN hole, 603. Sixth PIN hole, 604. Second solder pad, 605. Second electronic component, 7. First fan blade assembly, 8. Second fan blade assembly, 9. Wire, 10. Partition, 1001. First positioning post, 1003. Second positioning post. Embodiment

[0018] Now, with reference to the accompanying drawings, the structure and use of the present utility model will be further described. As Figures 1-7As shown in the figure, the contra-rotating fan includes a first fan housing 1, a second fan housing 2, a first winding assembly 3, a second winding assembly 4, a first circuit board 5, a second circuit board 6, a first blade assembly 7, a second blade assembly 8, a wire 9, and a partition 10. Among them, the first winding assembly 3 includes a first silicon steel sheet 301, an upper insulating frame 302, a lower insulating frame 303, and an enameled wire 304. The first silicon steel sheet 301, the upper insulating frame 302, and the lower insulating frame 303 are combined together with the enameled wire 304. The lower insulating frame 303 includes a first PIN pin 3031, a second PIN pin 3032, and a third PIN pin 3033. The enameled wire 304 includes a first wire end, a second wire end, and a third wire end. The second winding assembly 4 includes a second silicon steel sheet 401, an upper insulating frame 402, a lower insulating frame 403, and an enameled wire 404. The second silicon steel sheet 401, the upper insulating frame 402, and the lower insulating frame 403 are combined together with the enameled wire 404. The lower insulating frame 403 includes a fourth PIN pin 4031, a fifth PIN pin 4032, and a sixth PIN pin 4033. The enameled wire 404 includes a fourth wire end, a fifth wire end, and a sixth wire end. The first wire end of the first winding assembly 3 is connected to the upper end of the first PIN pin 3031, the second wire end is connected to the upper end of the second PIN pin 3032, and the third wire end is connected to the upper end of the third PIN pin 3033. The fourth wire end of the second winding assembly 4 is connected to the upper end of the fourth PIN pin 4031, the fifth wire end is connected to the upper end of the fifth PIN pin 4032, and the sixth wire end is connected to the upper end of the sixth PIN pin 4033. The first circuit board 5 includes a first PIN hole 501, a second PIN hole 502, a third PIN hole 503, a first pad 504, and a first electronic component 505. The second circuit board 6 includes a fourth PIN hole 601, a fifth PIN hole 602, a sixth PIN hole 603, a second pad 604, and a second electronic component 605. The outer diameter of the first middle tube 101 of the first fan housing 1 is fixedly provided with the first silicon steel sheet 301. The first winding assembly 3 is fixed to the outer diameter of the first middle tube 101. The fifth fixing hole 106 corresponds to the first PIN pin 3031, the sixth fixing hole 107 corresponds to the second PIN pin 3032, and the seventh fixing hole 108 corresponds to the third PIN pin 3033. The outer diameter of the second middle tube 201 of the second fan housing 2 is fixedly provided with the second silicon steel sheet 401. The second winding assembly 4 is fixed to the outer diameter of the second middle tube 201. The tenth fixing hole 206 corresponds to the fourth PIN pin 4031, the eleventh fixing hole 207 corresponds to the fifth PIN pin 4032, and the twelfth fixing hole 208 corresponds to the sixth PIN pin 4033.

[0019] Before assembly, the above-mentioned first fan housing 1 and the first fan blade assembly 7 form a front-stage fan finished product; after assembly, the second fan housing 2 and the second fan blade assembly 8 form a rear-stage fan finished product. The lower end of the first PIN 3031 is welded to the first PIN hole 501, the lower end of the second PIN 3032 is welded to the second PIN hole 502, and the lower end of the third PIN 3033 is welded to the third PIN hole 503. The lower end of the fourth PIN 4031 is welded to the fourth PIN hole 601, the lower end of the fifth PIN 4032 is welded to the fifth PIN hole 602, and the lower end of the sixth PIN 4033 is welded to the sixth PIN hole 603. The wire 9 is welded to the first pad 504 and the second pad 604. The partition 10 includes a first positioning post 1001 and a second positioning post 1002. The partition 10 is assembled with the first fan housing 1, and the first positioning post 1001 corresponds to the eighth fixing hole 109, and the second positioning post 1002 corresponds to the ninth fixing hole 1010. The first fan housing 1 and the second fan housing 2 are assembled together, and the first fixing hole 102 corresponds to the first buckle 202, the second fixing hole 103 corresponds to the second buckle 203, the third fixing hole 104 corresponds to the third buckle 204, and the fourth fixing hole 105 corresponds to the fourth buckle 205.

[0020] In summary, the above structure and wiring method can better improve the assembly problems of traditional contra-rotating fans, improve production efficiency, and at the same time can introduce automation to reduce the overall production cost.

Claims

1. A contra-rotating fan that is convenient for assembly. The fan housing one (1) and the fan housing two (2) of the contra-rotating fan are respectively square. One side of the fan housing one and the fan housing two that are connected is rotatably connected into one body through corresponding fixing holes and buckles at the end corners, and mounting holes are respectively provided at the end corners of the other sides of the fan housing one and the fan housing two. An outer diameter of a middle tube one (101) in the fan housing one is fixedly provided with a winding assembly one (3), and an inner shaft core of a fan blade assembly one (7) is sleeved into the middle tube one of the fan housing one. An outer diameter of a middle tube two (201) in the fan housing two is fixedly provided with a winding assembly two (4), and an inner shaft core of a fan blade assembly two (8) is sleeved into the middle tube two of the fan housing two. It is characterized in that On the middle of the stopper area of the grid on the side of the counter-rotating connection between the first fan housing (1) and the second fan housing (2), circuit board slots are respectively provided. On one side of the inner slot openings of the circuit board slots of the first fan housing and the second fan housing, notches communicating with the wire slots at the outer frames of the first fan housing and the second fan housing are respectively provided. The first circuit board (5) and the second circuit board (6) are respectively arranged in the circuit board slots of the first fan housing and the second fan housing. A partition (10) is provided at the slot opening of one side circuit board slot. The circuits of the wires (9) are respectively connected to the first circuit board and the second circuit board in the circuit board slots through the wire slots and notches of the first fan housing and the second fan housing; the PIN pins at the first winding component (3) and the second winding component (4) are respectively welded to the PIN holes of the first circuit board and the second circuit board through a fixing hole at the bottom inside the circuit board slots of the first fan housing and the second fan housing. The first circuit board and the second circuit board are respectively provided with the first electronic component (505) and the second electronic component (605).

2. The contra-rotating fan according to claim 1, characterized in that The first circuit board (5) and the second circuit board (6) are respectively provided with three PIN holes, which respectively correspond to the PIN pins of the first winding component (3) and the second winding component (4), and respectively correspond to the wire ends at the enameled wires of the first winding component and the second winding component.

3. The contra-rotating fan convenient for assembly according to claim 1, wherein The circuits of the wires (9) are respectively welded to the first pad (504) and the second pad (604) of the first circuit board (5) and the second circuit board (6).

4. The contra-rotating fan convenient for assembly according to claim 1, wherein At least one side surface of the partition (10) is provided with a first positioning post (1001) and a second positioning post (1002). The first positioning post and the second positioning post of the partition are respectively inserted into another fixing hole corresponding to the slot opening of the circuit board slot on one side of the first fan housing (1) or the second fan housing (2).

5. The contra-rotating fan according to claim 1, characterized in that At the end of the column body at the buckle of the second fan housing (2), an inverted buckle rib is provided, and openings are respectively provided at the inner side corners of one end of the central hole inside the column body.

Images