Ultra-thin single-ball fan structure

Abstract

The utility model relates to fan production technical field, especially single ball fan structure of ultrathin type. Including base, fan blade, stator, elastic part, ball bearing, magnetic ring, axle, axle connects base and fan blade respectively, stator installs in the base and is covered in the outside of axial, magnetic ring, ball bearing connects in the fan blade respectively, fan blade is rotatively connected on the axle through ball bearing, one end of elastic part abuts in the base inside, the other end of elastic part abuts ball bearing. Through fixing ball bearing on the fan blade, the spring gives ball bearing pre -tightening force in the base axle, assembles the snap ring again, forms single ball structure, and the service life is longer than the ultrathin type fan on market, and the safety is higher, and the price is cheaper than traditional double ball structure, reduces the cost cost, can solve the problem of the pipe wall thickness of the base of ultrathin small fan on market.

Description

Technical Field

[0001] This utility model relates to the field of fan manufacturing technology, and in particular to an ultra-thin single ball bearing fan structure. Background Technology

[0002] Ultra-thin fans are widely used in cooling systems to dissipate heat or blow air onto electronic products or heat-generating components. These fans typically use oil-lubricated powder metallurgy bearings or machined bearings. These bearings rely on sliding friction and are lubricated with synthetic oil. When the oil is depleted, the fan may malfunction, even failing to rotate, leading to damage to the electronic product or the entire cooling system. Ball bearings, on the other hand, use rolling friction, with oil and precision components sealed within a protective cover. Ball bearings on the market usually employ double ball bearings or a single ball bearing with a small powder metallurgy bearing, forming a symmetrical structure. However, due to space constraints in ultra-thin fans, it's impossible to accommodate two ball bearings or a single ball bearing with a small powder metallurgy bearing simultaneously, making ball bearing structures unsuitable for ultra-thin fans on the market.

[0003] In summary, considering that ultra-thin fans are widely used in high-precision equipment or products with high requirements for lifespan and quality, the commonly used oil-impregnated powder metallurgy bearings or machined bearings are insufficient to meet the needs of customers and consumers. Therefore, the development of ultra-thin single ball bearing fan structures has become a problem that needs to be solved. Utility Model Content

[0004] This invention provides an ultra-thin single ball bearing fan structure, aiming to overcome the problem of insufficient space in ultra-thin fans.

[0005] This utility model provides an ultra-thin single ball bearing fan structure, including a base, fan blades, a stator, an elastic element, a ball bearing, a magnetic ring, and a shaft. The shaft is connected to the base and the fan blades respectively. The stator is installed inside the base and sleeved on the outside of the shaft in the axial direction. The magnetic ring and the ball bearing are connected inside the fan blades respectively. The fan blades are rotatably connected to the shaft through the ball bearing. One end of the elastic element abuts against the inside of the base, and the other end of the elastic element abuts against the ball bearing.

[0006] As a further improvement of this utility model, the fan blade includes a fan surface and blades. The outer ring of the fan surface extends downward with a side circumference. A plurality of blades are evenly arranged on the side circumference of the fan surface. The fan surface is connected to the shaft through a ball bearing, and the blades are embedded in the base.

[0007] As a further improvement of this utility model, a bearing assembly position is provided at the rotation center of the fan blade, the first ring of the ball bearing is connected in the bearing assembly position, and the second ring of the ball bearing is connected to the shaft.

[0008] As a further improvement of this utility model, the bearing assembly position of the ball bearing and the fan blade is fixed by adhesive or fasteners.

[0009] As a further improvement of this utility model, after the fan blade is assembled on the shaft, the magnetic ring is spaced around the outer ring of the stator, and the magnetic ring is located within the electromagnetic range of the stator.

[0010] As a further improvement of this utility model, the elastic element is a spring, which is sleeved on the shaft, and the two ends of the spring abut against the base and the ball bearing, respectively.

[0011] As a further improvement of this utility model, a magnetic ring assembly position is provided on the inner wall of the fan blade, and the magnetic ring and the magnetic ring assembly position of the fan blade are fixed by adhesive or fasteners.

[0012] As a further improvement of this utility model, the ultra-thin single ball bearing fan structure also includes a retaining ring. The shaft and the base are integrally injection molded, and the retaining ring is connected to the shaft and limits the fan blades.

[0013] As a further improvement of this utility model, a locking position is provided at the top of the shaft, and the buckle is connected to the locking position by a buckle.

[0014] As a further improvement of this utility model, the shaft and the fan blade are integrally formed.

[0015] The beneficial effects of this utility model are: by fixing the ball bearing to the fan blade, the spring provides preload to the ball bearing at the base axis, and then assembling the buckle, a single ball bearing structure is formed, which has a longer service life and higher safety than ultra-thin fans on the market, and is cheaper than the traditional double ball bearing structure, thus reducing manufacturing costs; moreover, the ball bearing is directly installed on the fan blade, which can solve the problem of thin tube wall in the base of ultra-thin small fans on the market. Attached Figure Description

[0016] Figure 1 This is an overall diagram of the ultra-thin single ball bearing fan structure of this utility model;

[0017] Figure 2 This is an exploded view of the structure of the ultra-thin single ball bearing fan of this utility model;

[0018] Figure 3 This is a cross-sectional view of the ultra-thin single ball bearing fan structure of this utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figures 1 to 3As shown, the present invention discloses an ultra-thin single ball bearing fan structure, comprising a base 1, a fan blade 2, a stator 3, an elastic element 4, a ball bearing 5, a magnetic ring 6, and a shaft 7. The shaft 7 is connected to the base 1 and the fan blade 2 respectively. The stator 3 is installed inside the base 1 and sleeved on the outside of the shaft in the axial direction. The magnetic ring 6 and the ball bearing 5 are connected inside the fan blade 2 respectively. The fan blade 2 is rotatably connected to the shaft 7 through the ball bearing 5. One end of the elastic element 4 abuts against the inside of the base 1, and the other end of the elastic element 4 abuts against the ball bearing 5.

[0021] The base 1 and fan blade 2 are fixed by the shaft 7. The ball bearing 5 is tightly fitted or glued to the fan blade 2. A spring placed in the shaft 7 provides preload to the ball bearing 5, forming a closed-loop structure. The stator 3, when energized, drives the magnetic ring 6 mounted on the fan blade 2, and the fan begins to operate. This structure, by fixing the ball bearing 5 to the fan blade 2, providing preload to the bearing with a spring in the tube of the base 1, and then attaching the retaining ring 8, forms a single ball bearing structure. Furthermore, the ball bearing 5 is mounted on the fan blade 2, solving the problem of excessively thin walls in the tube of the base 1 of ultra-thin miniature fans on the market.

[0022] The fan blade 2 includes a fan surface 21 and blades 23. The outer ring of the fan surface 21 extends downward with a side circumference 22. Multiple blades 23 are evenly arranged on the side circumference 22 of the fan surface 21. The fan surface 21 is connected to the shaft 7 via a ball bearing 5, and the blades 23 are embedded inside the base 1. The fan surface 21 serves as the base of the fan blade 2 and is rotatably connected to the shaft 7 via the ball bearing 5, thereby driving the side circumference 22 and blades 23 to rotate. After the blades 23 are embedded inside the base 1, there is still a distance between them and the interior of the base 1. This embedded structure allows the entire fan component to be more compact and the whole machine to be made thinner. At the same time, the base 1 also protects the blades 23.

[0023] A bearing mounting position is provided at the rotation center of the fan blade 2. The first ring (outer ring) of the ball bearing 5 is connected to the bearing mounting position, and the second ring (inner ring) of the ball bearing 5 is connected to the shaft 7. The outer ring of the ball bearing 5 and the bearing mounting position of the fan blade 2 are fixed by adhesive or fasteners. By providing a bearing mounting position on the fan blade 2, the installation position of the ball bearing 5 can be positioned, facilitating docking and assembly. A fixed connection between the ball bearing 5 and the fan blade 2 can be achieved by means of tight fitting or adhesive fixing.

[0024] After the fan blade 2 is assembled onto the shaft 7, the magnetic ring 6 is spaced around the outer ring of the stator 3, and the magnetic ring 6 is within the electromagnetic range of the stator 3. When the stator 3 is energized and generates a magnetic field, the magnetic field will act on the magnetic ring 6, causing the magnetic ring 6 to rotate under the action of magnetic force, thereby driving the entire fan blade 2 to rotate.

[0025] The elastic element 4 is a spring, which is sleeved on the shaft 7, with its two ends abutting against the base 1 and the inner ring of the ball bearing 5, respectively. The spring can hold the ball bearing 5 against the fan blade 2, providing auxiliary fixation for the ball bearing 5. At the same time, when the other end of the shaft 7 is connected to the retaining ring 8 to limit the fan blade 2, the spring can cause the fan blade 2 to abut against the retaining ring 8, preventing excessive wobbling of the fan blade 2 during rotation.

[0026] A magnetic ring assembly position is provided on the inner wall of the fan blade 2. The magnetic ring 6 and the magnetic ring assembly position of the fan blade 2 are fixed by adhesive or fasteners. By setting the magnetic ring assembly position on the fan blade 2, the installation position of the magnetic ring 6 can be located, facilitating docking and assembly. The magnetic ring assembly position can be set on the side wall 22 of the fan blade 2. The magnetic ring 6 and the fan blade 2 can be fixedly connected by means of tight fitting or adhesive fixing.

[0027] The ultra-thin single ball bearing fan structure also includes a retaining ring 8, a shaft 7, and a base 1, all integrally injection molded. The retaining ring 8 is connected to the shaft 7 and limits the fan blades 2. The integral molding of the shaft 7 and base 1 ensures the strength of the shaft 7 and reduces the number of mounting components, improving assembly efficiency. The other end of the shaft 7 connects to the retaining ring 8, forming a limiting structure for the fan blades 2.

[0028] The top of the shaft 7 is provided with a locking position 71, and the retaining ring 8 is snapped into the locking position 71. After the retaining ring 8 is engaged with the locking position 71, it limits the movement of the fan blade 2 on the shaft 7. After the spring abuts against the inner ring of the ball bearing 5, the fan blade 2 will press against the retaining ring 8 under the action of the spring force, preventing it from shaking up and down when rotating and preventing the fan blade 2 from leaving the axial direction.

[0029] The shaft 7 and the fan blade 2 are integrally molded. Alternatively, the shaft 7 can be injection molded onto the fan blade 2, with the shaft 7 and ball bearing 5 fixed to the fan blade 2 for adjustment. The other end of the shaft 7 is connected to the base 1 via a fastening structure. This method is similar to integral molding of the shaft 7 and base 1, ensuring the strength of the shaft 7 and reducing the need for the retaining ring 8, thus improving assembly efficiency.

[0030] The assembly steps for this ultra-thin single ball bearing fan structure are as follows:

[0031] When the base 1 and the shaft 7 are injection molded as one piece, the magnetic ring 6 is tightly fitted or glued to the magnetic ring assembly position of the fan blade 2. Then, the ball bearing 5 and the bearing assembly position of the fan blade 2 are assembled by glue or tight fitting. The stator 3 is installed in the middle tube of the base 1. A spring is placed in the shaft 7 inside the middle tube of the base 1. Then, the assembled fan blade 2, magnetic ring 6 and ball bearing 5 are fitted onto the base 1. Finally, they are fixed by connecting them to the shaft 7 with the buckle 8.

[0032] If the incoming material is an injection-molded integrated structure of shaft 7 and fan blade 2, the assembly steps are similar to those described above. However, during the final assembly, the combined fan blade 2, magnetic ring 6, and ball bearing 5 are fitted onto the base 1, and the shaft 7 is fixed to the base 1 using fasteners or snap-fit ​​structures.

[0033] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An ultra-thin single ball bearing fan structure, characterized in that, The device includes a base, fan blades, a stator, an elastic element, ball bearings, a magnetic ring, and a shaft. The shaft connects the base and the fan blades. The stator is installed inside the base and fitted onto the outside of the shaft in an axial direction. The magnetic ring and the ball bearings are connected inside the fan blades. The fan blades are rotatably connected to the shaft via the ball bearings. One end of the elastic element abuts against the inside of the base, and the other end of the elastic element abuts against the ball bearings.

2. The ultra-thin single ball bearing fan structure according to claim 1, characterized in that, The fan blade includes a fan surface and blades. The outer ring of the fan surface extends downward with a side circumference. Multiple blades are evenly arranged on the side circumference of the fan surface. The fan surface is connected to the shaft through a ball bearing, and the blades are embedded in the base.

3. The ultra-thin single ball bearing fan structure according to claim 1, characterized in that, The fan blade has a bearing assembly position at its rotation center. The first ring of the ball bearing is connected to the bearing assembly position, and the second ring of the ball bearing is connected to the shaft.

4. The ultra-thin single ball bearing fan structure according to claim 3, characterized in that, The bearing assembly positions of the ball bearing and the fan blade are fixed by adhesive application or fasteners.

5. The ultra-thin single ball bearing fan structure according to claim 1, characterized in that, After the fan blades are assembled onto the shaft, the magnetic rings are spaced around the outer ring of the stator, and the magnetic rings are located within the electromagnetic range of the stator.

6. The ultra-thin single ball bearing fan structure according to claim 1, characterized in that, The elastic element is a spring, which is sleeved on the shaft, and the two ends of the spring abut against the base and the ball bearing, respectively.

7. The ultra-thin single ball bearing fan structure according to claim 1, characterized in that, The inner wall of the fan blade is provided with a magnetic ring assembly position, and the magnetic ring and the magnetic ring assembly position of the fan blade are fixed by dispensing glue or fasteners.

8. The ultra-thin single ball bearing fan structure according to claim 1, characterized in that, It also includes a retaining ring, wherein the shaft and the base are integrally injection molded, and the retaining ring is connected to the shaft and limits the fan blades.

9. The ultra-thin single ball bearing fan structure according to claim 8, characterized in that, The top of the shaft is provided with a locking position, and the buckle is connected to the locking position by a buckle.

10. The ultra-thin single ball bearing fan structure according to claim 1, characterized in that, The shaft and fan blades are integrally formed.

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