Sunken computer fan

Abstract

The utility model discloses a sinking type computer fan which comprises a shell, a rotating shaft, an impeller and a driving device, a support is arranged at the bottom of the shell, a shaft seat extending upwards is arranged in the middle of the support, a shaft hole is formed in the shaft seat, the rotating shaft is installed in the shaft hole in a pivoted mode, and a bearing is arranged between the outer wall of the rotating shaft and the inner wall of the shaft hole. A positioning hole is formed in the lower wall of the middle of the impeller, the top end of the rotating shaft is arranged in the positioning hole, a first magnetic piece is arranged on the periphery of the positioning hole, and a second magnetic piece matched with the first magnetic piece is arranged at the upper end of the shaft seat. The bearing can be sealed by arranging the second magnetic part at the upper end of the shaft seat, meanwhile, magnetic attraction force can be applied to the impeller through cooperation of the first magnetic part and the second magnetic part, therefore, when the impeller is at the initial rotating end, the impeller can be effectively attached, separation of the impeller is avoided, and use stability of the computer fan is effectively guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of computer fans, in particular to a sinking computer fan. Background Art

[0002] With the development of computers, the requirements for cooling fans are becoming increasingly higher. Existing computer fans generally use a single bracket structure to position the impeller. However, the impeller generates upward pressure at the beginning of startup. When the bearing limit is flawed, it may cause the impeller to detach from the bracket. Therefore, in order to achieve stable rotation of the impeller, for example, Chinese patent CN202420495063.8 adopts a dual bracket structure, thereby ensuring stable rotation of the impeller. However, in actual use, the dual brackets also generate a certain amount of wind resistance, thereby reducing wind speed and increasing noise. Utility Model Content

[0003] The main purpose of the utility model is to provide a sinking computer fan, which aims to adopt a single bracket structure to ensure the stable rotation of the impeller and avoid the impeller from detaching from the bracket at the beginning of rotation.

[0004] To achieve the above-mentioned purpose, the present invention provides a sinking computer fan, comprising:

[0005] A housing, wherein a bracket is provided at the bottom of the housing, an upwardly extending shaft seat is provided in the middle of the bracket, and the shaft seat is provided with a shaft hole;

[0006] A rotating shaft, the rotating shaft is pivotally mounted in the shaft hole, and a bearing is provided between the outer wall of the rotating shaft and the inner wall of the shaft hole;

[0007] An impeller, wherein a positioning hole is provided on a lower wall of a middle portion of the impeller, a top end of the rotating shaft is disposed in the positioning hole, a first magnetic member is provided on an outer periphery of the positioning hole, and a second magnetic member is provided on an upper end of the shaft seat to cooperate with the first magnetic member, wherein the first magnetic member and the second magnetic member are used to apply a magnetic force to the impeller to move toward the bracket;

[0008] The driving device is arranged between the inner peripheral wall of the impeller and the bracket, and is used to drive the impeller to rotate.

[0009] In the actual design, by arranging the second magnetic part at the upper end of the shaft seat, positioning pressure can be applied to the bearing to reduce the displacement of the bearing. At the same time, the bearing can be sealed (to prevent the lubricating oil from spilling). At the same time, the cooperation of the first magnetic part and the second magnetic part can apply magnetic attraction to the impeller. Therefore, when the impeller is at the initial end of rotation, the impeller can be effectively fitted to prevent the impeller from detaching, effectively ensuring the stable use of the computer fan.

[0010] Especially for some usage scenarios, the impeller is set downward, and the magnetic attraction force of the first magnetic part and the second magnetic part can be increased to further ensure the stability of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a cross-sectional view of the utility model;

[0012] Figure 2 This is a half-section schematic diagram of the utility model;

[0013] Figure 3 This is an exploded view of the utility model;

[0014] Figure 4 It is a three-dimensional schematic diagram of the utility model.

[0015] In the figure,

[0016] 1 is the housing, 10 is the bracket, 11 is the shaft seat, 12 is the shaft hole,

[0017] 2 is the shaft, 20 is the bearing,

[0018] 3 is the impeller, 31 is the positioning seat, 31a is the positioning hole,

[0019] 41 is the first magnetic member, 42 is the second magnetic member, 42a is the blocking portion, 42b is the magnetic attraction portion, and 42c is the vertical portion.

[0020] 5 is a driving device, 51 is a stator, 52 is a rotor,

[0021] 6 is a bezel,

[0022] 71 is a wear-resistant sheet, 72 is an arc portion,

[0023] 8 is the PCB board, 81 is the LED light,

[0024] 9 is a balance part. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, top, bottom, inside, outside, vertical, horizontal, longitudinal, counterclockwise, clockwise, circumferential, radial, axial...), then the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0027] In addition, if there are descriptions involving "first" or "second" in the embodiments of the present invention, the descriptions of "first" or "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0028] like Figures 1 to 4 As shown, a sinking computer fan includes:

[0029] A housing 1 is provided with a bracket 10 at the bottom of the housing 1, an upwardly extending shaft seat 11 is provided in the middle of the bracket 10, and the shaft seat 11 is provided with a shaft hole 12;

[0030] A rotating shaft 2 is pivotally mounted in the shaft hole 12, with a bearing 20 provided between the outer wall of the rotating shaft 2 and the inner wall of the shaft hole 12;

[0031] The impeller 3 has a positioning hole 31a formed on its lower wall in the middle portion. The top end of the rotating shaft 2 is disposed in the positioning hole 31a. A first magnetic member 41 is disposed on the outer periphery of the positioning hole 31a. A second magnetic member 42 is disposed on the upper end of the shaft seat 11 and cooperates with the first magnetic member 41. The first magnetic member 41 and the second magnetic member 42 are used to apply a magnetic force to the impeller 3 to cause it to move toward the bracket 10.

[0032] The driving device 5 is provided between the inner peripheral wall of the impeller 3 and the bracket 10 , and is used for driving the impeller 3 to rotate.

[0033] In the actual design, by arranging the second magnetic member 42 at the upper end of the shaft seat 11, positioning pressure can be applied to the bearing 20 to reduce the displacement of the bearing 20. At the same time, the bearing 20 can be sealed (to prevent the lubricating oil from spilling out). At the same time, the first magnetic member 41 and the second magnetic member 42 can cooperate to apply a magnetic attraction force to the impeller 3. Therefore, when the impeller 3 is at the initial end of rotation, the impeller 3 can be effectively fitted to prevent the impeller 3 from detaching, thereby effectively ensuring the stable use of the computer fan.

[0034] Especially for some usage scenarios, the impeller 3 is set downward, and the magnetic attraction force of the first magnetic member 41 and the second magnetic member 42 can be increased, further ensuring the stability of use.

[0035] Specifically, the driving device 5 includes a stator 51 arranged on the periphery of the shaft seat 11 and a rotor 52 arranged on the periphery of the impeller 3. The stator 51 is a magnetic induction coil and the rotor 52 is a permanent magnet, thereby realizing the rotation of the impeller 3, that is, the structure of a brushless motor.

[0036] In the embodiment of the present invention, a positioning seat 31 is protruded from the middle of the impeller 3, and the positioning hole 31a is provided in the positioning seat 31. The protruded positioning seat 31 can provide a longer installation length, thereby ensuring the connection between the rotating shaft 2 and the impeller 3.

[0037] Specifically, a closed-loop surrounding portion is provided on the outer periphery of the positioning seat 31, and an embedding groove 6 is provided between the inner wall of the surrounding portion and the outer wall of the positioning seat 31. The second magnetic part 42 is arranged in the embedding groove 6. The second magnetic part 42 is circular, which facilitates the stable installation of the second magnetic part 42.

[0038] In the embodiment of the present utility model, the second magnetic member 42 includes a stopper 42a extending into the shaft hole 12 and a magnetic attraction portion 42b provided on the upper end of the shaft seat 11. The stopper 42a is in contact with the upper end of the bearing 20, and the magnetic portion is arranged opposite to the second magnetic member 42. The second magnetic member 42 and the first magnetic member 41 as a whole have a mutual attraction effect, and the position where the magnetic attraction force is the largest is the magnetic attraction portion 42b.

[0039] The setting of the stopper 42a can limit the bearing 20 and also serve as an oil seal for the bearing 20, effectively preventing the lubricating oil from overflowing due to the downward setting of the fan.

[0040] Specifically, the cross section of the second magnetic member 42 is a two-step structure, thereby achieving two functions with one structure, and can increase the contact area between the second magnetic member 42 and the shaft seat 11, thereby ensuring installation stability.

[0041] In the embodiment of the present invention, the first magnetic member 41 is made of metal iron or iron alloy, and the second magnetic member 42 is a permanent magnet, which facilitates processing and installation.

[0042] Specifically, the second magnetic member 42 includes a vertical portion 42c, which forms a hollow cavity. The positioning seat 31 has a balancing portion 9 extending toward the hollow cavity. The balancing portion 9 can balance the axis, reduce the initial starting force, and improve the stability and service life of the rotation.

[0043] In the embodiment of the present invention, the bottom wall of the shaft seat 11 is provided with a wear-resistant sheet 71, and the bottom end of the rotating shaft 2 is provided with an arc portion 72 that contacts the wear-resistant sheet 71. The provision of the arc portion 72 can reduce the contact area while ensuring the stability of the rotation of the rotating shaft 2.

[0044] Specifically, a PCB board 8 is provided on the upper wall of the bracket 10 away from the shaft seat 11 , the magnetic induction coil is connected to the PCB board 8 , and the PCB board is provided with LED lights 81 distributed along its circumference.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sinking computer fan, characterized in that: include: A housing, wherein a bracket is provided at the bottom of the housing, an upwardly extending shaft seat is provided in the middle of the bracket, and the shaft seat is provided with a shaft hole; A rotating shaft, the rotating shaft is pivotally mounted in the shaft hole, and a bearing is provided between the outer wall of the rotating shaft and the inner wall of the shaft hole; An impeller, wherein a positioning hole is provided on a lower wall of a middle portion of the impeller, a top end of the rotating shaft is disposed in the positioning hole, a first magnetic member is provided on an outer periphery of the positioning hole, and a second magnetic member is provided on an upper end of the shaft seat to cooperate with the first magnetic member, wherein the first magnetic member and the second magnetic member are used to apply a magnetic force to the impeller to move toward the bracket; The driving device is arranged between the inner peripheral wall of the impeller and the bracket, and is used to drive the impeller to rotate.

2. The sunken computer fan according to claim 1, wherein: The driving device comprises a stator arranged on the periphery of the shaft seat and a rotor arranged on the periphery of the impeller. The stator is a magnetic induction coil and the rotor is a permanent magnet.

3. The downdraft computer fan according to claim 1, wherein: A positioning seat is protruded from the middle of the impeller, and the positioning hole is arranged in the positioning seat.

4. The downdraft computer fan according to claim 3, wherein: A closed-loop surrounding portion is provided on the outer periphery of the positioning seat, an embedding groove is provided between the inner wall of the surrounding portion and the outer wall of the positioning seat, and the second magnetic member is provided in the embedding groove, and the second magnetic member is circular.

5. The downdraft computer fan according to claim 1, wherein: The second magnetic component includes a stopper extending into the shaft hole and a magnetic attraction portion provided at the upper end of the shaft seat. The stopper is in contact with the upper end of the bearing, and the magnetic attraction portion is arranged opposite to the second magnetic component.

6. The downdraft computer fan according to claim 1, wherein: The cross section of the second magnetic member is a two-step structure.

7. The downdraft computer fan according to claim 1, wherein: The first magnetic component is made of metal iron or iron alloy, and the second magnetic component is a permanent magnet.

8. The downdraft computer fan according to claim 3, wherein: The second magnetic member includes a vertical portion, the vertical portion surrounds a hollow cavity, and the positioning seat extends toward the hollow cavity to form a balancing portion.

9. The downdraft computer fan according to claim 1, wherein: The bottom wall of the shaft seat is provided with a wear-resistant sheet, and the bottom end of the rotating shaft is provided with an arc portion in contact with the wear-resistant sheet.

10. The downdraft computer fan according to claim 2, wherein: A PCB board is provided on the upper wall of the bracket away from the shaft seat, the magnetic induction coil is connected to the PCB board, and the PCB board is provided with LED lights distributed along its circumference.

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