Fan structure of elastic pre-pressing single ball bottom buckle

Abstract

The utility model discloses a fan structure of an elastic prepressing single ball bottom buckle. The fan structure comprises a fan frame, fan blades, a shaft core, a ball bearing, a limiting piece and an elastic supporting assembly. The fan frame is provided with a middle pipe, an inner cavity of the middle pipe is vertically through, the ball bearing is arranged in the middle pipe and arranged on the outer side of the shaft core in a sleeving mode, and the ball bearing is in sliding fit with the middle pipe and the shaft core. A protruding ring extending in the radial direction of the axis of the middle pipe is formed at the top of the middle pipe, the limiting piece is arranged at the bottom of the shaft core, and the elastic supporting assembly is installed at the bottom of the middle pipe. The upper portion of the ball bearing is limited through the protruding ring, then the shaft core is supported through the elastic supporting assembly, the limiting piece applies upward pre-pressure to the ball bearing, the upper side and the lower side of the ball bearing are elastically clamped, the stability of operation of the ball bearing is improved, and the service life of the ball bearing is prolonged. And the service life of the ball bearing can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of cooling fan manufacturing and processing technology, specifically to a fan structure with an elastic pre-compressed single ball bearing bottom clip. Background Technology

[0002] In the electronics industry, the heat generated by electronic components during operation is immeasurable, especially electronic chips, which control the operation of the entire electronic system. Heat can severely damage the components themselves and accelerate the aging of surrounding devices, reducing their lifespan. Heat sinks have emerged to address this issue, and fans, as commonly used active heat dissipation components in heat sinks, are indispensable. They play a crucial role in the entire heat dissipation process, so the quality of the fan's structure and performance directly affects the heat dissipation performance of the heat sink.

[0003] Single ball bearings are a common fan structure in cooling fans. Because ball bearings are precision components, using a tight-fitting assembly method will significantly reduce their lifespan. However, if a tight-fitting assembly method is not used, the ball bearing is prone to displacement during operation. Alternatively, the stator and mover of the drive assembly can be offset axially to generate axial magnetic thrust to apply preload to the ball bearing, but this can lead to large vibrations and high magnetic losses. All of these situations can negatively impact the ball bearing, resulting in a reduced lifespan or causing vibration and abnormal noise in the fan blades, making it difficult to improve the fan's lifespan and performance. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this utility model is to provide a fan structure with elastic preload single ball bearing bottom buckle, which can increase the stability of the ball bearing operation, ensure the service life of the ball bearing, and improve the performance of the fan.

[0005] The first technical solution of this utility model is as follows:

[0006] A fan structure with an elastic preload single ball bearing bottom buckle includes: a fan frame, fan blades, a shaft core, ball bearings, a limiting component, an elastic support assembly, and a drive assembly. A central tube is located at the center of the fan frame, with its inner cavity extending vertically. The top end of the shaft core is fixedly connected to the fan blades. The main body of the shaft core is placed inside the central tube. The ball bearings are disposed inside the central tube and sleeved on the outside of the shaft core, with the ball bearings slidingly engaging with both the central tube and the shaft core. A convex ring extending radially towards its axis is formed at the top of the central tube, with the inner diameter of the convex ring being larger than the outer diameter of the shaft core. The limiting component is located at the bottom of the shaft core. The elastic support assembly is installed at the bottom of the central tube, and the bottom end of the shaft core abuts against the top surface of the elastic support assembly. The drive assembly is disposed on the fan frame and is drivenly connected to the fan blades.

[0007] Furthermore, it also includes a copper alloy bearing, which is disposed between the ball bearing and the convex ring.

[0008] Furthermore, the limiting component is a buckle, and the bottom end of the shaft is provided with a locking block, which cooperates with the buckle.

[0009] Furthermore, a circumferentially extending movable groove is provided above the card block, so that the top surface of the card block forms a support surface. The inner diameter of the buckle is smaller than the outer diameter of the card block. The buckle has multiple radially extending through grooves from its inner ring, and the multiple through grooves are arranged in an array.

[0010] Furthermore, the card block is hemispherical.

[0011] Furthermore, the elastic support assembly includes a bottom buckle and an elastic element. The bottom buckle is installed at the bottom of the middle tube, the elastic element is disposed on the top surface of the bottom buckle, and the shaft core abuts against the elastic element.

[0012] Furthermore, a circumferentially extending mounting groove is provided at the bottom of the middle tube, and the bottom buckle is installed in the mounting groove.

[0013] Furthermore, the top outer edge of the bottom buckle is provided with a first inclined surface, and the bottom of the inner cavity of the middle tube is provided with a second inclined surface.

[0014] Furthermore, the elastic element is a spherical spring or a cylindrical spring combined with a wear-resistant plate.

[0015] Furthermore, the drive assembly includes a mover and a stator, the mover being disposed on the fan blade, the stator being disposed outside the central tube, and the center of the magnet of the mover and the center of the silicon steel sheet of the stator being on the same radial plane.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The ball bearing is limited at the top by the convex ring, and the shaft is supported by the elastic support assembly. The limiting member applies an upward preload to the ball bearing to achieve elastic clamping on the upper and lower sides of the ball bearing. This helps to improve the stability of the ball bearing operation, ensure the service life of the ball bearing, and improve the performance of the fan. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of the fan structure in this utility model;

[0020] Figure 2 This is a partial cross-sectional view of the central tube in this utility model;

[0021] Figure 3 This is a cross-sectional view of the fit between the central tube and the bottom buckle in this utility model;

[0022] Figure 4 This is a schematic diagram of the fit between the shaft and the retaining ring of this utility model;

[0023] Figure 5 This is a partially enlarged view of an elastic support member (cylindrical spring with wear-resistant sheet) in one embodiment of this utility model.

[0024] Figure 6 This is a partial enlarged view of the elastic support member (spherical spring sheet) in one embodiment of this utility model.

[0025] Reference numerals: 1-Fan frame; 11-Central tube; 12-Protruding ring; 101-Mounting groove; 102-Second inclined surface; 2-Fan blade; 3-Shaft core; 31-Clamping block; 301-Moving groove; 302-Supporting surface; 4-Ball bearing; 5-Limiting component; 51-Snap ring; 501-Through groove; 6-Elastic support assembly; 61-Bottom buckle; 601-First inclined surface; 62-Elastic component; 621-Spherical spring sheet; 622-Columnar spring; 623-Wear-resistant sheet; 7-Drive assembly; 81-Motor; 82-Stator; 8-Copper bearing. Detailed Implementation

[0026] To facilitate a better understanding of the purpose, structure, features, and effects of this utility model, it will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that the features shown in the figures are not necessarily drawn to scale. Furthermore, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0027] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," "right," "front," and "back" are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] like Figure 1-2 As shown, this embodiment provides a fan structure with an elastic preloaded single ball bearing bottom buckle, including: fan frame 1, fan blade 2, shaft core 3, ball bearing 4, limiting member 5, elastic support assembly 6, and drive assembly 7;

[0029] A central tube 11 is provided at the center of the fan frame 1. The inner cavity of the central tube 11 extends vertically. The top end of the shaft core 3 is fixedly connected to the fan blade 2. The main body of the shaft core 3 is placed inside the central tube 11. The ball bearing 4 is disposed inside the central tube 11 and sleeved on the outside of the shaft core 3. The ball bearing 4 slides in cooperation with the central tube 11 and the shaft core 3 respectively.

[0030] The top of the central tube 11 has a convex ring 12 extending radially toward its axis. The inner diameter of the convex ring 12 is larger than the outer diameter of the shaft core 3. The convex ring 12 is used to limit the upper position of the ball bearing 4.

[0031] The limiting member 5 is located at the bottom of the shaft core 3 and is used to provide support for the lower part of the ball bearing 4;

[0032] The elastic support assembly 6 is installed at the bottom of the middle tube 11, and the bottom end of the shaft core 3 abuts against the top surface of the elastic support assembly 6. The elastic support assembly 6 provides an upward preload to the ball bearing 4 through the limiting member 5, so that the top end of the ball bearing 4 abuts against the bottom surface of the convex ring 12.

[0033] The drive component 7 is disposed on the fan frame 1 and is drivenly connected to the fan blade 2.

[0034] The ball bearing 4 is limited above by the convex ring 12, and the shaft core 3 is supported by the elastic support component 6. The limiting member 5 applies an upward preload to the ball bearing 4 to achieve elastic clamping of the upper and lower sides of the ball bearing 4, which helps to improve the stability of the operation of the ball bearing 4, ensure the service life of the ball bearing 4, and improve the performance of the fan.

[0035] like Figure 1 , 5 As shown in Figure 6, as a preferred embodiment, the fan structure further includes a copper bearing 8, which is disposed between the ball bearing 4 and the convex ring 12, thereby improving the stability of the rotation of the shaft core 3.

[0036] like Figure 1 , 4 As shown in Figures 5 and 6, in a preferred embodiment, the limiting member 5 is a retaining ring 51, and the bottom end of the shaft core 3 is provided with a locking block 31. The locking block 31 and the retaining ring 51 cooperate to provide support for the ball bearing 4.

[0037] like Figure 4 As shown, further, a circumferentially extending movable groove 301 is provided above the locking block 31, so that the top surface of the locking block 31 forms a support surface 302. The inner diameter of the buckle 51 is smaller than the outer diameter of the locking block 31. The buckle 51 has multiple radially extending through grooves 501 from its inner ring, and the multiple through grooves 501 are arranged in an array. During assembly, the locking block 31 is passed through the buckle 51, so that the buckle 51 is placed in the movable groove 301 and abuts against the support surface 302, which facilitates assembly and positioning.

[0038] like Figure 4 As shown, preferably, the locking block 31 is hemispherical, which facilitates the assembly of the locking block 31 with the buckle 51 and reduces the contact surface between the locking block 31 and the elastic support component 6, thereby reducing the friction between the shaft core 3 and the elastic support component 6 when the shaft core 3 rotates.

[0039] like Figure 1 , 5As shown in Figure 6, in a preferred embodiment, the elastic support assembly 6 includes a bottom buckle 61 and an elastic element 62. The bottom buckle 61 is installed at the bottom of the middle tube 11, the elastic element 62 is disposed on the top surface of the bottom buckle 61, and the shaft core 3 abuts against the elastic element 62.

[0040] like Figure 2 , 3 As shown, further, a circumferentially extending mounting groove 101 is provided at the bottom of the middle tube 11, and the bottom buckle 61 is installed in the mounting groove 101.

[0041] like Figure 2 , 3 As shown, in this embodiment, both the bottom buckle 61 and the middle tube 11 are plastic products with a certain degree of elasticity; the outer edge of the top surface of the bottom buckle 61 is provided with a first inclined surface 601, and the bottom of the inner cavity of the middle tube 11 is provided with a second inclined surface 102. Through the cooperation of the first inclined surface 601 and the second inclined surface 102, it is convenient to assemble the bottom buckle 61 onto the mounting groove 101.

[0042] like Figure 5 , 6 As shown, further, the elastic element 62 is a spherical spring sheet 621 or a cylindrical spring 622 combined with a wear-resistant sheet 623; specifically, as... Figure 5 As shown, the locking block 31 and the spherical spring plate 621 cooperate to achieve point-to-point contact, reducing friction; the cylindrical spring 622 can achieve pre-pressure correction, further improving stability; as Figure 6 As shown, the contact between the card block 31 and the wear-resistant plate 623 can reduce friction; a specific accessory of the elastic element 62 can be selected based on factors such as cost, performance and lifespan.

[0043] like Figure 1 As shown, in a preferred embodiment, the drive assembly 7 includes a mover 81 and a stator 82. The mover 81 is disposed on the fan blade 2, and the stator 82 is disposed on the outside of the central tube 11. The center of the magnet of the mover 81 and the center of the silicon steel sheet of the stator 82 are on the same radial plane. This reduces the axial resistance between the magnet on the fan blade 2 and the silicon steel sheet of the stator 82 when the fan is running, effectively improving the flexibility of the fan blade 2.

[0044] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A fan structure with an elastic preloaded single ball bearing bottom buckle, characterized in that, include: The fan frame (1), fan blade (2), shaft core (3), ball bearing (4), limiting component (5), elastic support assembly (6), and drive assembly (7) are provided. A central tube (11) is provided at the center of the fan frame (1), and the inner cavity of the central tube (11) runs through it vertically. The top end of the shaft core (3) is fixedly connected to the fan blade (2). The main body of the shaft core (3) is placed inside the central tube (11). The ball bearing (4) is set inside the central tube (11) and sleeved on the outside of the shaft core (3). The ball bearing (4) is respectively connected to the central tube (11) and the fan blade (2). The tube (11) is slidably fitted with the shaft core (3); a convex ring (12) extending radially toward its axis is formed on the top of the tube (11), the inner diameter of the convex ring (12) is larger than the outer diameter of the shaft core (3), the limiting member (5) is located at the bottom of the shaft core (3), the elastic support assembly (6) is installed at the bottom of the tube (11), the bottom end of the shaft core (3) abuts against the top surface of the elastic support assembly (6), and the driving assembly (7) is located on the fan frame (1) and is drivenly connected to the fan blade (2).

2. The fan structure with elastic preloaded single ball bearing bottom buckle according to claim 1, characterized in that, It also includes a copper bearing (8), which is disposed between the ball bearing (4) and the convex ring (12).

3. The fan structure with elastic preloaded single ball bearing bottom buckle according to claim 1, characterized in that, The limiting component (5) is a buckle (51), and the bottom end of the shaft core (3) is provided with a locking block (31), which cooperates with the buckle (51).

4. The fan structure with elastic preloaded single ball bearing bottom buckle according to claim 3, characterized in that, The card block (31) has a circumferentially extending movable groove (301) on its upper part, so that the top surface of the card block (31) forms a support surface (302). The inner diameter of the buckle (51) is smaller than the outer diameter of the card block (31). The buckle (51) has multiple radially extending through grooves (501) from its inner ring, and the multiple through grooves (501) are arranged in an array.

5. The fan structure with elastic preloaded single ball bearing bottom buckle according to claim 4, characterized in that, The card block (31) is hemispherical.

6. The fan structure with elastic preloaded single ball bearing bottom buckle according to claim 1, characterized in that, The elastic support assembly (6) includes a bottom buckle (61) and an elastic element (62). The bottom buckle (61) is installed at the bottom of the middle tube (11), and the elastic element (62) is disposed on the top surface of the bottom buckle (61). The shaft core (3) abuts against the elastic element (62).

7. The fan structure with elastic preloaded single ball bearing bottom buckle according to claim 6, characterized in that, The bottom of the central tube (11) is provided with a circumferentially extending mounting groove (101), and the bottom buckle (61) is installed in the mounting groove (101).

8. The fan structure with elastic preloaded single ball bearing bottom buckle according to claim 1, characterized in that, The top outer edge of the bottom buckle (61) is provided with a first inclined surface (601), and the bottom of the inner cavity of the middle tube (11) is provided with a second inclined surface (102).

9. The fan structure with elastic preloaded single ball bearing bottom buckle according to claim 1, characterized in that, The elastic element (62) is a spherical spring sheet (621) or a cylindrical spring (622) combined with a wear-resistant sheet (623).

10. The fan structure with elastic preloaded single ball bearing bottom buckle according to claim 1, characterized in that, The drive assembly (7) includes a mover (81) and a stator (82). The mover (81) is disposed on the fan blade (2), and the stator (82) is disposed outside the middle tube (11). The center of the magnet of the mover (81) and the center of the silicon steel sheet of the stator (82) are on the same radial plane.

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