Rotating shaft structure of fan

Abstract

The invention provides a rotating shaft structure of a fan, which is characterized in that a shaft seat with a containing groove is convexly arranged in a containing space in a fan frame, a stator silicon steel sheet group of a driving unit and a circuit board are arranged outside the shaft seat, fan blades are assembled in the containing space, and a rotor magnet is arranged on the inner side of a fan blade hub and is aligned to the outside of the stator silicon steel sheet group. One side of the rotating shaft is assembled and positioned at the fan blades, the other side of the rotating shaft extends into an accommodating groove assembled in the shaft seat, at least one bearing, at least one oil-containing body and at least one oil retaining cover are sleeved outside the rotating shaft in the accommodating groove, the at least one oil-containing body and the at least one oil retaining cover are overlapped on the at least one bearing, and the aperture of a shaft hole of the at least one oil retaining cover is smaller than the outer diameter of the rotating shaft. And after the oil-containing body contains oil, an oil film on the inner diameter of the oil-containing body can be in contact with the rotating shaft so as to fill a gap between the oil-containing body and the rotating shaft, and the oil-containing body can absorb or supplement the oil quantity of the rotating shaft, so that the oil overflow of the rotating shaft can be prevented, the rotating shaft can be moistened, the operation stability of the rotating shaft is improved, and the service life of the rotating shaft is prolonged.

Description

Technical Field

[0001] The present invention relates to a fan shaft structure, and more particularly to a structure for preventing grease from overflowing, dust from intruding, and shaft current from being generated when the shaft is running. The fan blades are assembled in the accommodating space of a fan frame. After the shaft is assembled at the fan blades, a bearing, an oil-containing body, and an oil retaining cover are sleeved on the outside of the shaft to achieve the purpose of preventing grease from overflowing, dust from intruding, and even salt corrosion from being generated when the shaft is running. Background Art

[0002] Nowadays, computers have powerful computing functions and their speeds are rapidly increasing to enhance the computer's execution performance. Since the various electronic components such as the central processing unit (CPU), image processor, power supply or various interface cards inside the computer host have ultra-high-speed computing functions, various electronic components will generate higher temperature heat energy when processing computing instructions, which also causes the temperature inside the computer host to rise. The heat dissipation devices and fans used to assist various electronic components in dissipating heat have poor heat dissipation performance, resulting in unsatisfactory air convection inside the computer host, which will cause the computer host to overheat and crash or be forced to shut down, etc., and it is more likely to cause various electronic components inside the computer host to malfunction or be damaged, etc. Therefore, how to use a good heat dissipation system to effectively dissipate heat for various electronic components and work normally at the allowed temperature has become an important issue that the industry attaches importance to.

[0003] The fan used in the general cooling system is equipped with a bearing at the rotating shaft of the fan blade, and there must be a predetermined gap between the bearing and the rotating shaft to assist the smooth rotation of the rotating shaft by the bearing; however, because there is a gap between the rotating shaft and the bearing, it is easy for fine dust introduced by the rotation of the fan blade to fall into the gap between the rotating shaft and the bearing, and the dust increases the friction resistance between the rotating shaft and the bearing, affecting the rotation of the rotating shaft; in addition, the rotation between the rotating shaft and the bearing in the fan blade must be properly lubricated to avoid the rotation between the rotating shaft and the bearing due to excessive Drying out and producing friction noise. In order to solve the problem of excessive drying out caused by the rotation between the shaft and the bearing, the industry usually uses porous oil-containing self-lubricating bearings to reduce the noise caused by drying out and friction between the shaft and the bearing. However, the grease released by the self-lubricating bearings is easy to overflow from the outside of the shaft as the shaft rotates, causing the shaft and the bearing to fail prematurely due to drying out, or molecular foreign matter such as acids, alkalis and salts in the external environment are easy to penetrate between the shaft and the bearing, destroying the surface smoothness of the bearing and the shaft, causing the fan to easily malfunction and reducing the service life of the fan.

[0004] In addition, the bearings used in the shaft of a general cooling fan are metal ball bearings or copper sintered oil-containing bearings. Because their materials and shafts are both made of metal, the bearings and shafts are coated with lubricating oil when the fan leaves the factory, which does not conduct electricity and each becomes an insulated circuit to form different potential differences. However, after the fan has been running for a long time, the lubrication between the bearings and the shaft will be lost, and the shaft and the bearing will form metal friction with each other, which will generate noise and static electricity. When the potential difference generated during the operation of the shaft and the bearing accumulates to a certain extent, the oil film will be lost and conduction will be formed, which will release voltage and generate sparks, causing electrical corrosion between the shaft and the bearing. That is, the temperature of the sparks causes the surface roughness of the shaft and the bearing to be damaged, thereby reducing the service life of the fan. In addition, when the fan is in operation, it is easy for dust, fine debris or foreign matter such as acid, alkali and salt from the external environment to penetrate, causing friction loss and other defects between the metal shaft and the bearing.

[0005] Therefore, how to solve the problems and troubles of lubricating grease drying up, spilling, and dust intrusion when the fan shaft and bearings rotate, and the trouble and inconvenience of noise caused by insufficient lubrication between the shaft and the bearings, and even solve the chemical corrosion and shaft current caused by acid, alkali, and salt, are the directions that the relevant manufacturers engaged in this industry are eager to study and improve. Summary of the invention

[0006] Therefore, in view of the above problems and deficiencies, the main purpose of the present invention is to provide a fan shaft structure, wherein a shaft seat with a receiving groove is convexly provided in the internal receiving space of the fan frame, and a stator silicon steel sheet group and a circuit board of a driving unit are installed on the outside of the shaft seat, and a fan blade is assembled in the receiving space, and a rotor magnet is provided on the inner side of the fan blade hub to correspond to the outside of the stator silicon steel sheet group, and one side of the shaft is provided for assembly and positioning at the fan blade, and the other side of the shaft extends to the receiving groove assembled in the shaft seat, and then at least one bearing, a stacking magnet and a bearing are sleeved on the outside of the shaft in the receiving groove. At least one oil-containing body and at least one oil retaining cover are placed on at least one bearing. After the oil-containing body is filled with oil, the oil film on the inner diameter can contact the shaft core to fill the gap between the oil-containing body and the shaft (i.e., the shaft core). This can replenish the lubricating oil lost by the porous oil-containing bearing due to long-term operation of the shaft, prevent the lubricating oil from overflowing, and block dust, fine particles or foreign matter such as acids, alkalis and salts from the external environment from penetrating between the shaft and the bearing, so that the rotation of the shaft and the bearing is more stable, thereby reducing the friction and noise generated by the rotation between the shaft and the bearing, and extending the service life of the fan.

[0007] Another object of the present invention is to provide a retaining ring between the shaft seat and the bearing or between the oil-containing body and the bearing (the oil retaining cover can also serve as the retaining ring when necessary), and a shaft recessed groove can be provided on the shaft at the upper and lower positions corresponding to the retaining ring, and the inner hole of the retaining ring is sleeved on the shaft recessed groove; the diameter of the shaft hole of the retaining ring is smaller than the outer diameter of the shaft and larger than the outer diameter of the shaft recessed groove, so as to achieve the purpose of preventing the shaft from falling off the outside of the bearing.

[0008] Another object of the present invention is to provide at least one bearing on the outside of the rotating shaft, and the bearing comprises a conventional porous sintered metal alloy material or a plastic material with a hardness of 50HV to prevent shaft current and acid, alkali and salt corrosion, or a composite plastic material [such as PTFE (Teflon), PEEK (polyetheretherketone), Nylon (nylon), etc.] with a hardness of less than 50HV, self-lubricating properties, a friction coefficient of less than 0.3, non-conductive, and a temperature resistance of more than 100 degrees Celsius to further increase the bearing life.

[0009] The present invention provides a rotating shaft structure of a fan, comprising a fan frame, fan blades, a rotating shaft and a driving unit, wherein: the fan frame has an accommodating space inside, and a shaft seat with an accommodating groove is convexly provided in the accommodating space, and a stator silicon steel sheet group and a circuit board of the driving unit are installed outside the shaft seat; the fan blades are assembled in the accommodating space of the fan frame, and a rotor magnet is provided on the inner side of the fan blade hub relative to the outside of the stator silicon steel sheet group; and one side of the rotating shaft is assembled at the fan blade, and the other side extends to the accommodating groove of the shaft seat assembled in the fan frame, and the rotating shaft located in the accommodating groove is sleeved on the outside of at least one bearing, at least one oil-containing body stacked between at least one bearing and the fan blade, and at least one oil retaining cover stacked on at least one oil-containing body, and a gap is left between the bearing hole and the rotating shaft to allow the rotating shaft of the fan blade to run smoothly in the bearing.

[0010] Among them, at least one of the oil-containing bodies sleeved on the outside of the rotating shaft is an elastic oil-absorbing sponge, and the oil film of the oil-containing body after being filled with oil can contact the rotating shaft, and at least one oil-retaining cover is stacked on at least one of the oil-containing bodies, and at least one of the oil-retaining covers is provided with a buckle ring under it and sleeved in the embedding groove of the rotating shaft, or the oil-retaining cover is provided with an axial hole with a hole diameter smaller than the outer diameter of the rotating shaft and the axial hole is sleeved in the embedding groove of the rotating shaft. The oil-retaining cover can be in the shape of an "I" or an "N".

[0011] The shaft is externally sleeved with at least one bearing made of copper or plastic with a hardness of less than 50 HV. The bearing shape can be cylindrical or U-shaped alone or both cylindrical and U-shaped.

[0012] The shaft is externally sleeved with at least one bearing made of a composite plastic material [such as PTFE (Teflon), PEEK (polyetheretherketone)] with a hardness of less than 50 HV, self-lubricating properties, a friction coefficient of less than 0.3, non-conductive, and a temperature resistance of more than 100 degrees Celsius. The bearing shape can be cylindrical or U-shaped alone, or both cylindrical and U-shaped.

[0013] Among them, at least one bearing is sleeved on the outside of the rotating shaft and a bottom cover is arranged under the bearing, and the bottom cover and the fan frame can be combined in an interference tight fit or in an embedded buckle fastening manner.

[0014] The shaft seat is provided with a receiving space extending downward and a stationary impeller pressure plate extending radially outward of the receiving space.

[0015] The present invention further provides a fan shaft structure, comprising a fan frame, a fan blade, a shaft and a drive unit, wherein: the fan frame has an accommodating space inside, and a shaft seat with an accommodating groove is convexly provided in the accommodating space, a shaft is provided in the shaft seat, and a stator silicon steel sheet group and a circuit board of the drive unit are installed outside the shaft seat; the fan blade comprises a hub with an accommodating space, an iron shell is provided on the outer ring of the accommodating space, a rotor magnet is provided on the inner side of the iron shell and is relatively located outside the stator silicon steel sheet group, a shaft seat with an accommodating groove is provided in the center of the accommodating space, and the shaft At least one bearing is provided in the receiving groove of the seat, at least one oil-containing body is stacked between at least one bearing and the bottom of the fan blade, and at least one oil-containing cover is stacked under at least one of the oil-containing bodies. One side of the rotating shaft seat is connected to the center of the fan blade, and the other side extends to the receiving groove of the shaft seat assembled in the fan frame. A gap is left between the rotating shaft seat and the receiving groove, and a gap is left between the bearing hole in the rotating shaft seat and the rotating shaft in the receiving groove, so that the rotating shaft seat of the fan blade can rotate freely and smoothly in the receiving groove of the fan frame.

[0016] Among them, at least one of the oil retaining covers is provided with an axial hole with a hole diameter smaller than the outer diameter of the rotating shaft, and at least one oil retaining cover is stacked under at least one of the oil-containing bodies. At least one of the oil retaining covers is provided with a retaining ring below and is sleeved in the embedding groove of the rotating shaft, or the oil retaining cover is provided with an axial hole with a hole diameter smaller than the outer diameter of the rotating shaft and the axial hole is sleeved in the embedding groove of the rotating shaft. The oil retaining cover can be in the shape of an "I" or an "N".

[0017] The shaft is externally sleeved with at least one bearing made of copper or plastic with a hardness of less than 50 HV. The bearing shape can be cylindrical or U-shaped alone or both cylindrical and U-shaped.

[0018] Among them, the outer sleeve of the rotating shaft is provided with at least one bearing having a hardness of less than 50HV, self-lubricating properties, a friction coefficient of less than 0.3, non-conductive, and a temperature resistance of more than 100 degrees Celsius. The bearing shape can be cylindrical or U-shaped alone, or both cylindrical and U-shaped.

[0019] The shaft seat is provided with a receiving space extending downward and a stationary impeller pressure plate extending radially outward of the receiving space.

[0020] The advantages of the present invention are as follows: the aperture of the shaft hole of the at least one oil retaining cover is smaller than the outer diameter of the rotating shaft, which can prevent the fan blades from separating from the bearing, and the oil film on the inner diameter of the oil-containing body after being filled with oil can contact the rotating shaft to fill the gap between the oil-containing body and the rotating shaft, which can prevent dust, fine debris or foreign matter such as acid, alkali and salt from the external environment from penetrating between the rotating shaft and the bearing. The oil-containing body can also absorb or replenish the oil of the rotating shaft, which can prevent the grease of the rotating shaft from overflowing and moisturize the rotating shaft, thereby improving the stability and life of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a side cross-sectional view of the first embodiment of the present invention.

[0022] Figure 2 For the present invention Figure 1 A partial enlarged view of part a.

[0023] Figure 3 It is a side cross-sectional view of a second embodiment of the present invention.

[0024] Figure 4 For the present invention Figure 3 A partial enlarged view of part b.

[0025] Figure 5 It is a side cross-sectional view of a third embodiment of the present invention.

[0026] Figure 6 It is a side cross-sectional view of a fourth embodiment of the present invention.

[0027] Figure 7 It is a partial three-dimensional cross-sectional view of a fifth embodiment of the present invention.

[0028] Figure 8 It is a side cross-sectional view of a sixth embodiment of the present invention.

[0029] Fig. 9 It is a side cross-sectional view of a seventh embodiment of the present invention.

[0030] Fig.10 It is a side cross-sectional view of an eighth embodiment of the present invention.

[0031] Fig.11 It is an exploded view of the ninth embodiment of the present invention.

[0032] Fig.12 It is a side cross-sectional view of a ninth embodiment of the present invention.

[0033] Description of reference numerals: 1-fan frame; 10-accommodating space; 101-assembly groove; 102-holding shoulder; 103-storing groove; 104-through hole; 11-axle seat; 110-accommodating groove; 1101-content groove; 1102-inner shoulder; 111-wear-resistant gasket; 112-bearing bracket; 1121-isolating ring; 1122-upper space; 1123-lower space; 12-bottom frame seat; 120-storing space; 121-embedded buckle; 122-positioning shaft hole; 113-bottom cover; 13-static impeller pressure plate; 2-fan blade; 21-wheel hub; 210-accommodating space; 211-inner wall surface; 22-iron shell; 23- Rotating shaft seat; 230-accommodating groove; 231-bearing groove; 232-wear-resistant lining; 24-rotating shaft bearing seat; 3-rotating shaft; 30-embedded groove; 31-bearing; 311-upper bearing; 312-lower bearing; 32-oil-containing body; 321-upper oil-containing body; 322-lower oil-containing body; 33-oil retaining cover; 330-shaft hole; 34-rotating shaft embedded groove; 341-rotating shaft head embedded groove; 35-retaining ring; 350-inner shaft hole; 351-heightening gasket; 3510-inner ring hole; 36-wear-resistant gasket; 37-end; 38-limiting baffle; 4-driving unit; 41-stator silicon steel sheet group; 42-circuit board; 43-rotor magnet. DETAILED DESCRIPTION

[0034] In order to achieve the above-mentioned purpose and effect, the technical means and structures, implementation methods, etc. adopted by the present invention are described in detail with reference to the accompanying drawings for the features and functions of the preferred embodiments of the present invention as follows, so as to facilitate a complete understanding.

[0035] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , which are respectively a side cross-sectional view of the first embodiment of the present invention, Figure 1 A partial enlarged view of part a of the second embodiment, a side cross-sectional view of the second embodiment, Figure 3 The partial enlarged view of part b of FIG. 1 is shown in FIG. 2 . It can be clearly seen from the figure that the present invention provides a rotating shaft structure of a fan, including a fan frame 1, fan blades 2, a rotating shaft 3 and a driving unit 4, wherein:

[0036] The fan frame 1 has a receiving space 10 inside, and an axle seat 11 is protrudingly provided in the receiving space 10. The axle seat 11 has a receiving groove 110 inside, and a stator silicon steel sheet group 41 (including a plurality of silicon steel sheets and enameled wire windings, etc.) and a circuit board 42 of the drive unit 4 are installed outside the axle seat 11.

[0037] The fan blade 2 is assembled in the accommodating space 10 of the fan frame 1, and the rotor magnet 43 of the driving unit 4 is provided inside the fan blade 2, and the rotor magnet 43 is relatively located outside the stator silicon steel sheet group 41 (including multiple silicon steel sheets and enameled wire windings, etc.).

[0038] One side of the rotating shaft 3 is assembled at the fan blade 2, and the other side extends to the receiving groove 110 of the shaft seat 11 assembled in the fan frame 1, and the rotating shaft 3 in the receiving groove 110 is sleeved with at least one bearing 31, at least one oil-containing body 32 stacked on at least one bearing 31, and at least one oil-containing cover 33 stacked on at least one oil-containing body 32, and at least one oil-containing cover 33 is provided with an axial hole 330, and the aperture of the axial hole 330 can be slightly larger than the outer diameter of the rotating shaft 3 to ensure the smooth rotation of the rotating shaft 3.

[0039] The at least one oil-containing body 32 sleeved on the outer side of the rotating shaft 3 of the present invention can be an elastic oil-absorbing sponge or other elastic oil-containing body 32 that can contain lubricating oil. After the oil-containing body 32 is filled with oil, the oil film on the inner diameter can contact the rotating shaft 3 to fill the gap between the oil-containing body 32 and the rotating shaft 3 (i.e., the shaft core), thereby preventing dust, fine particles or foreign matter such as acids, alkalis and salts from the external environment from penetrating between the rotating shaft 3 and the bearing 31, so that the rotating shaft 3 and the bearing 31 can rotate more stably, less likely to increase friction resistance, and can also reduce the loss caused by friction, which can effectively reduce the noise generated by the rotation between the rotating shaft 3 and the bearing 31, so as to improve the quietness of the fan during operation, and effectively extend the service life of the fan; and the rotating shaft 3 can be provided with at least one rotating shaft groove 34, relative to the position of at least one buckling ring 35 and the oil conservation cover 33, for at least one buckling ring 35 or The shaft hole 330 of the oil retaining cover 33 is sleeved on the shaft embedding groove 34; and the aperture of at least one retaining ring 35 or the shaft hole 330 of the oil retaining cover 33 is smaller than the outer diameter of the shaft 3 and larger than the outer diameter of the shaft embedding groove 34, so as to ensure smooth operation and allow the oil film on the inner diameter of the oil-containing body 32 to contact the shaft 3 after being filled with oil, thereby filling the gap between the oil-containing body 32 and the shaft 3, thereby preventing the lubricating oil from being thrown out of the shaft 3 when the fan blades 2 rotate, and preventing dust from invading from the gap of the shaft 3 and preventing the fan blades 2 from falling off the shaft 3 and the bearing 31 when the fan blades 2 rotate. Moreover, because the oil film on the inner diameter of the oil-containing body 32 is elastic and lubricating after being filled with oil, when the inner diameter of the oil film of the oil-containing body 32 contacts the rotating shaft 3, no interference and abnormal sound will be generated, thereby reducing the rotation speed of the fan blades 2, thereby keeping the inside of the bearing 31 clean and lubricated, so as to provide the fan with a good heat dissipation effect.

[0040] See also Figure 8As shown, the fan blade 2 may further include a hub 21 having a receiving space 210, and an iron shell 22 is provided on the outer ring of the receiving space 210, and a rotor magnet 43 is provided on the inner side of the iron shell 22 relative to the outside of the stator silicon steel sheet group 41 of the drive unit 4, and a rotating shaft bearing seat 24 having a receiving groove 230 and a bearing groove 231 is provided at the center of the receiving space 210, at least one bearing 31 is provided in the bearing groove 231, at least one oil-containing body 32 is stacked between the bottom of the at least one bearing 31 and the bottom of the bearing groove 231 of the fan blade 2, and at least one oil retaining cover 33 is provided under the oil-containing body 32, one side of the rotating shaft 3 is connected to the bottom center of the shaft seat 11, and the other side extends and is assembled in the rotating shaft bearing seat 24 of the fan blade 2, and a gap is left between the rotating shaft bearing seat 24 and the inner wall of the receiving groove 110 to allow the rotating shaft bearing seat 24 of the fan blade 2 to rotate freely and smoothly in the receiving groove 110 of the fan frame 1.

[0041] At least one bearing 31 is sleeved on the outside of the rotating shaft 3. If the bearing 31 can be combined with the above-mentioned oil-containing body 32 structure and the bearing 31 is replaced with a plastic material or even a composite plastic bearing with low friction coefficient, low hardness, non-conductive, self-lubricating, acid-proof, alkali-proof and salt-proof corrosion, it will be more able to avoid the accumulation of potential difference generated by long-term friction between the rotating shaft 3 and the bearing 31 to generate current (shaft current), thereby avoiding the high-temperature electrical corrosion caused by sparks generated by the current, thereby increasing the service life and application range of the fan (in harsh environments such as: dusty, acidic, alkaline, Salt) can also reduce the metal friction between the metal bearing 31 (generally copper or copper-iron sintered oil-containing bearing 31 or metal ball bearing 31) and the metal shaft 3. Since copper and iron are both conductive materials, the generation of shaft current cannot be avoided, nor can the high-frequency noise caused by the hard grinding between the metal shaft 3 (generally SUS420, with a hardness of more than 300HV) and the metal oil-containing bearing 31 or between the metal balls, metal inner ring, metal outer ring and metal retaining frame be reduced. Therefore, the purpose of extending the service life of the fan can be achieved by avoiding the generation of shaft current.

[0042] Furthermore, at least one bearing 31 is sleeved on the outside of the rotating shaft 3. The bearing 31 can be made of a composite plastic material [such as PTFE (Teflon), PEEK (polyetheretherketone) or Nylon, etc.] with a hardness of less than 50HV, self-lubricating properties, a friction coefficient of less than 0.3, non-conductive, and a temperature resistance of more than 100°C, which will further increase the service life of the fan.

[0043] See also Figure 3As shown, the fan frame 1 of the present invention is provided with a wear-resistant gasket 111 at the bottom of the receiving groove 110 of the shaft seat 11, and a bearing bracket 112 is installed in the receiving groove 110 on the wear-resistant gasket 111, and at least one isolation ring 1121 is protruded inside the bearing bracket 112, so that at least two or more stacked upper bearings 311, upper oil-containing bodies 321, lower bearings 312, and lower oil-containing bodies 322 are provided on the outside of the rotating shaft 3, respectively located at the upper and lower spaces 1122 and 1123 of the at least one isolation ring 1121, so that an appropriate spacing distance can be formed between the upper bearing 311 and the lower oil-containing body 322 and the lower bearing 312, thereby reducing the friction area between the upper bearing 311, the lower bearing 312 and the rotating shaft 3 to reduce the friction resistance, thereby assisting the rotating shaft 3 to rotate more smoothly, assisting the fan blades 2 to rotate more smoothly, and improving the heat dissipation effect of the fan.

[0044] The rotating shaft 3 of the present invention is sleeved with at least one bearing 31 on the outside, and at least one oil-containing body 32 is stacked on the at least one bearing 31, and at least one oil-containing cover 33 is stacked on the at least one oil-containing body 32, which can effectively prevent the at least one oil-containing body 32 from being blocked by the at least one oil-containing cover 33, so that the at least one oil-containing body 32 will not fall off the shaft seat 11, and the grease released by it will not overflow the outside of the rotating shaft 3, so as to ensure proper lubrication between the rotating shaft 3 and the bearing 31. At the same time, the at least one oil-containing cover 33 and the at least one oil-containing body 32 can also block dust, fine debris or foreign matter such as acid, alkali and salt from the external environment, and it is not easy to penetrate between the rotating shaft 3 and the bearing 31, thereby reducing the rotational friction between the rotating shaft 3 and the bearing 31, and also reducing the loss caused by friction, etc., thereby improving the tolerance of the bearing 31, forming a good contact with the rotating shaft 3, and rotating more smoothly, keeping the fan frame 1 and the fan blades 2 clean, not easy to be stained with grease and foreign matter from the external environment, etc., so as to extend the service life of the fan.

[0045] See also Figure 5As shown, it is a side cross-sectional view of the third embodiment of the present invention. It can be clearly seen from the figure that the fan frame 1 of the present invention is provided with a shaft seat 11 protruding in the accommodating space 10, and the shaft seat 11 has a accommodating groove 110 that penetrates to the outside of the bottom, so that one side of the rotating shaft 3 is assembled at the fan blade 2 and the other side extends to the accommodating groove 110 of the shaft seat 11 assembled in the fan frame 1, and a bearing bracket 112 is installed outside the rotating shaft 3 in the accommodating groove 110, and at least one isolation ring 1121 is protruding inside the bearing bracket 112, so that at least two or more stacked upper bearings 311, upper oil-containing bodies 321, lower bearings 312, and lower oil-containing bodies 322 are sleeved on the outside of the rotating shaft 3, respectively located at the at least one isolation ring 1121. The upper and lower spaces 1122 and 1123 of the upper and lower spaces 1122 and 1123 can form an appropriate spacing distance between the upper bearing 311 and the lower oil-containing body 322 and the lower bearing 312, thereby reducing the friction area between the upper bearing 311, the lower bearing 312 and the rotating shaft 3 to reduce the friction resistance and at least one oil retaining cover 33 is stacked on at least one oil-containing body 32, and at least one retaining ring 35 is respectively assembled on the outside of the rotating shaft 3 below the lower bearing 312, one or more wear-resistant washers 36 are provided between any retaining ring 35 and the bearing 31, and a wear-resistant bottom plug cover 113 is provided below the accommodating groove 110 relative to the lower bearing 312 and the retaining ring 35, and then one end 37 of the rotating shaft 3 in the accommodating groove 110 abuts against the bottom cover 113 (the bottom cover 113 can also be provided with two or more as shown in the first Fig.11 and Fig.12 The end portion 37 may be bowl-shaped or hemispherical to reduce the contact area between the end portion 37 and the bottom cover 113 and reduce the friction resistance to prevent the fan blade 2 from being thrown out of the bearing 31 and sliding up and down when the fan blade 2 runs at a very high speed. The stator silicon steel sheet group 41 extends to the rotor magnet 43 located outside the shaft seat 11 and assembled at the fan blade 2; and at least one oil-containing body 32 sleeved on the outside of the rotating shaft 3 can be an elastic oil-absorbing sponge or other elastic oil-containing body 32 that can contain lubricating oil. After the oil-containing body 32 is filled with oil, its oil film can contact the rotating shaft 3, thereby filling the gap formed between the rotating shaft 3 and the oil-containing body 32, and does not affect the operation of the rotating shaft 3, and can absorb the vibration and shaking generated during the rotation of the rotating shaft 3 and the bearing 31, and can also block dust, fine debris or foreign matter such as acid, alkali and salt from the external environment, and is not easy to penetrate between the rotating shaft 3 and the bearing 31, so that the rotating shaft 3 and the bearing 31 can rotate more stably, it is not easy to increase friction resistance, and it can also reduce the loss caused by friction, etc., which can effectively reduce the noise generated by the rotation between the rotating shaft 3 and the bearing 31, so as to improve the silent effect when the fan is running, and can effectively extend the service life of the fan. This further assists the rotating shaft 3 to rotate more smoothly, thereby assisting the fan blades 2 to rotate more smoothly and improving the heat dissipation effect of the fan.

[0046] See also Figure 6As shown, it is a side cross-sectional view of the fourth embodiment of the present invention. It can be clearly seen from the figure that the fan frame 1 of the present invention has a hollow assembly groove 101 at the bottom of the accommodating space 10, and a buckling shoulder 102 is provided at the bottom of the accommodating space 10 inside the assembly groove 101, and the assembly groove 101 can be used to assemble the bottom frame seat 12, then a buckle portion 121 is provided on one side of the bottom frame seat 12, which can be embedded in the buckling shoulder 102 inside the assembly groove 101, so that the bottom frame seat 12 can be positioned at the assembly groove 101, and a storage space 120 is provided inside the bottom frame seat 12 for assembling the circuit board 42 of the drive unit 4, and then a shaft seat 11 is provided above the storage space 120 on the circuit board 42, so that the bottom frame seat 12 can be positioned at the shaft seat 11, and the stator silicon steel sheet group 41 of the drive unit 4 is assembled outside the shaft seat 11. 1 is a circuit board 42 electrically connected to the bottom of the shaft seat 11, that is, one side of the rotating shaft 3 is assembled at the fan blade 2, and the other side extends to the accommodating groove 110 inside the shaft seat 11 assembled in the fan frame 1, and the rotor magnet 43 assembled inside the fan blade 2 is located on the outside of the stator silicon steel sheet group 41, and the outside of the rotating shaft 3 located in the accommodating groove 110 can be sleeved with at least one bearing 31, at least one oil-containing body 32 stacked on at least one bearing 31, and at least one oil-retaining cover 33 stacked on at least one oil-containing body 32, and at least one rotating shaft embedding groove 34 is provided on the outside of the rotating shaft 3, and the oil-retaining cover can be in a U-shaped shape, and the center of the oil-retaining cover 33 has a shaft hole 330, and the hole diameter is smaller than the outer diameter of the rotating shaft 3 and larger than the inner diameter of the rotating shaft embedding groove 34, and the shaft hole 330 corresponds to the rotating shaft embedding groove 34, and the at least one oil-retaining cover 33 can be made of elastic plastic material. When the rotating shaft 3 penetrates into at least one oil-containing body 32 and then penetrates into at least one bearing 31, so that at least one rotating shaft embedding groove 34 on the rotating shaft 3 is located at at least one shaft hole 330, at least one shaft hole 330 is subjected to the elastic restoring force, rebounds and embeds at least one rotating shaft embedding groove 34, and forms a clamping limit; and when the fan blades 2 on one side of the rotating shaft 3 rotate at a high speed, the axial force generated may drive the rotating shaft 3 to float and displace in the axial direction. When the rotating shaft 3 floats and displaces and makes at least one rotating shaft embedding groove 34 located at the shaft hole 330 of at least one oil retaining cover 33, at least one rotating shaft embedding groove 34 is abutted against the inner shaft hole 330 of at least one or more oil retaining covers 33, so as to achieve the purpose of limiting the axial floating and displacement of the rotating shaft 3, and can block the axial floating and displacement of the rotating shaft 3, and can effectively prevent the rotating shaft 3 from axially escaping from the outside of at least one bearing 31, at least one oil-containing body 32 and at least one oil retaining cover 33, so that the rotating shaft 3 is located in the receiving groove 110 of the shaft seat 11 and rotates stably.

[0047] In addition, at least one oil retaining cover 33 is provided on the outside of the rotating shaft 3 at the top of at least one oil-containing body 32, and the at least one oil retaining cover 33 is provided with an axial hole 330; and at least one oil-containing body 32 can be an elastic oil-absorbing sponge or other oil-containing body 32 that can contain lubricating oil, and the oil film on the inner diameter of the oil-containing body 32 after being filled with oil can contact the rotating shaft 3 to fill the gap between the oil-containing body 32 and the rotating shaft 3 (i.e., the shaft core), and the protective function of at least one oil retaining cover 33 can prevent dust, fine debris or foreign matter such as acid, alkali and salt from the external environment from penetrating between the rotating shaft 3 and the bearing 31, so that the rotating shaft 3 and the bearing 31 can rotate more stably, it is not easy to increase friction resistance, and the loss caused by friction can be reduced, etc., which can effectively reduce the noise generated by the rotation between the rotating shaft 3 and the bearing 31, so as to improve the silent effect when the fan is running, and can effectively extend the service life of the fan.

[0048] See also Figure 7As shown, it is a side view of the fifth embodiment of the present invention. It can be clearly seen from the figure that the fan frame 1 of the present invention is provided with a shaft seat 11 protruding in the accommodating space 10, and the shaft seat 11 has a accommodating groove 110 inside, and the bottom of the accommodating groove 110 is provided with an accommodating groove 230 with a reduced aperture, and an inner shoulder 1102 is formed between the accommodating groove 110 and the accommodating groove 230, so that one side of the rotating shaft 3 can be assembled in the accommodating groove 110 and the accommodating groove 230 of the shaft seat 11 of the fan frame 1, and the other side extends to be assembled at the rotating shaft seat 23 inside the fan blade 2. The fan blade 2 is provided with a rotating shaft seat 23 at the center of the accommodating space 210 of the hub 21, so that the rotating shaft 3 can be buried in the injection molding machine. A shaft head groove 341 is provided in the shaft seat 23 or even at the shaft 3, and can be embedded with plastic injection molding to form a tight clamping combination with the shaft seat 23, which is not easy to separate, and at least one bearing 31 can be provided outside the shaft 3 in the receiving groove 110, and at least one bearing 31 is stacked (the bearing 31 is fixed in the receiving groove 110 on the shaft seat 11, and a gap is left between the shaft 3 and the bearing 31), at least one oil-containing body 32 is stacked on the at least one bearing 31, and an oil-retaining cover 33 is stacked on the oil-containing body 32. At least one retaining ring 35 is assembled on the outside of the shaft 3, and the retaining ring 35 can be used to abut against the shoulder between the receiving groove 110 and the receiving groove 230. 1102, and a wear-resistant gasket 111 can be provided at the bottom of the content groove 1101, that is, the end 37 of one side of the rotating shaft 3 in the accommodating groove 110 can be abutted against the wear-resistant gasket 111, so as to limit the rotating shaft 3 from sliding up and down when the fan blade 2 of the fan is running at a very high speed; and at the bottom of the accommodating space 10 outside the shaft seat 11, the stator silicon steel sheet group 41 (including a plurality of silicon steel sheets and enameled wire windings, etc.) and the circuit board 42 of the driving unit 4 can be installed, and the stator silicon steel sheet group 41 extends to the side of the shaft seat 11 and faces the rotor magnet 43 assembled at the fan blade 2; and at least one oil-containing body 32 sleeved on the outside of the rotating shaft 3 can be an elastic oil-absorbing The sponge or other elastic oil-containing body 32 that may contain lubricating oil can fill the gap between the oil-containing body 32 and the shaft 3 by means of the oil film in the inner hole of the oil-containing body 32 contacting the shaft 3, so as to block foreign objects such as dust from invading the gap between the shaft 3 and the bearing 31, and can also block foreign objects such as dust, fine particles or acids, alkalis and salts from the external environment from penetrating between the shaft 3 and the bearing 31, so as to provide the advantages of more stable rotation of the shaft 3 and the bearing 31, less likely to increase friction resistance, and reducing the loss caused by friction, etc., which can effectively reduce the noise generated by the rotation between the shaft 3 and the bearing 31, so as to improve the silent effect when the fan is operating, and can effectively extend the service life of the fan, etc.

[0049] See also Figure 8, which is a side cross-sectional view of the sixth embodiment of the present invention. It can be clearly seen from the figure that the fan frame 1 of the present invention is provided with a shaft seat 11 protruding in the accommodating space 10, and the shaft seat 11 has an accommodating groove 110 inside. At the bottom of the accommodating space 10 outside the shaft seat 11, a stator silicon steel sheet group 41 (including a plurality of silicon steel sheets and enameled wire windings, etc.) and a circuit board 42 of the drive unit 4 can be installed, and the stator silicon steel sheet group 41 extends to the side of the shaft seat 11 and is assembled at the fan blade 2. The fan blade 2 is at the hub. The center of the accommodating space 210 is provided with a shaft bearing seat 24 having an accommodating groove 230 and a bearing groove 231. The interior of the shaft bearing seat 24 can be sleeved with at least one bearing 31, at least one oil-containing body 32 is stacked under the at least one bearing 31, and at least one oil-containing body 32 is stacked under the at least one oil-containing body 32. At least one oil-retaining cover 33 is assembled between the top of at least one bearing 31 and the inner portion 1102, so that the buckle ring 35 can be pressed by the bearing 31 against the inner shoulder 1102 between the bearing groove 231 and the accommodating groove 230, and the buckle ring The inner ring 35 can be fastened in the shaft groove 34 at the shaft 3, and a wear-resistant gasket 111 can be provided at the bottom of the inner groove 1101, that is, the end 37 of one side of the shaft 3 in the accommodating groove 110 can be abutted against the wear-resistant gasket 111, so as to limit the shaft bearing seat 24 on the fan blade 2 from sliding up and down when the fan blade 2 is running at a very high speed, and at least one oil-containing body 32 sleeved on the outer side of the shaft 3 can be an elastic oil-absorbing sponge or other elastic oil-containing body 32 that can contain lubricating oil, and the oil film of the inner hole of the oil-containing body 32 contacts the shaft. It can fill the gap between the oil-containing body 32 and the rotating shaft (core) 3 to block foreign objects such as dust from invading the gap between the rotating shaft and the bearing, that is, it can block foreign objects such as dust, fine particles or acids, alkalis and salts from the external environment from penetrating between the rotating shaft 3 and the bearing 31, so that the rotating shaft (core) 3 and the bearing 31 can rotate more stably, less likely to increase friction resistance, and can also reduce the loss caused by friction. It can effectively reduce the noise generated by the rotation between the rotating shaft 3 and the bearing 31, so as to improve the silent effect when the fan is operating, and can effectively extend the service life of the fan.

[0050] See also Fig. 9As shown, it is a side view of the seventh embodiment of the present invention. It can be clearly seen from the figure that the fan frame 1 of the present invention is provided with a receiving groove 103 at the bottom of the accommodating space 10, and the receiving groove 103 is further provided with a shaft seat 11, and the stator silicon steel sheet group 41 (including a plurality of silicon steel sheets and enameled wire windings, etc.) and a circuit board 42 of the drive unit 4 can be installed on the outside of the shaft seat 11, and the stator silicon steel sheet group 41 extends to the outer side of the shaft seat 11 and is opposite to the rotor magnet 43 assembled at the fan blade 2, and then a rotating shaft seat 23 is provided at the center of the hub 21 accommodating space 210 inside the fan blade 2, so that one side of the rotating shaft 3 can be plastically embedded in the rotating shaft seat 23, and the other side extends to the accommodating groove 110 and the accommodating groove 230 of the shaft seat 11 assembled in the fan frame 1. At the inner hole of the bearing 31, at least one bearing 31, at least one oil-containing body 32 stacked on the at least one bearing 31, and at least one or more oil retaining covers 33 stacked on the at least one oil-containing body 32 can be sleeved on the outside of the rotating shaft 3 in the accommodating groove 110 and the accommodating groove 230, and at least one rotating shaft embedding groove 34 can be provided on the outside of the rotating shaft 3, that is, at least one retaining ring 35 is assembled at the corresponding at least one rotating shaft embedding groove 34, and then a heightening gasket 351 is padded between the bottom of the at least one retaining ring 35 and the inner shoulder 1102, and the heightening gasket 351 is provided with an inner ring hole 3510, and the aperture of the inner ring hole 3510 is larger than the inner shaft hole 350 of the retaining ring 35 and even larger than the rod diameter of the rotating shaft 3, and the at least one retaining ring 35 can be made of elastic plastic material.

[0051] Then, when the rotating shaft 3 penetrates at least one oil-containing body 32 and then penetrates the buckle ring 35 and the heightening gasket 351, the outer diameter of the rotating shaft 3 will abut against the periphery of the inner shaft hole 350 of at least one or one buckle ring 35, and at least one buckle ring 35 will be pressed and deformed, causing the inner shaft hole 350 to sink into the inner ring hole 3510 of the heightening gasket 351 along with the abutment of the rotating shaft 3, and the rotating shaft 3 will then penetrate into at least one bearing 31, so that when at least one rotating shaft embedding groove 34 on the rotating shaft 3 is aligned with at least one buckle ring 35, the inner shaft hole 350 of at least one buckle ring 35 is subjected to the elastic restoring force, rebounds and embeds into at least one rotating shaft embedding groove 34, and forms a clamping limit; and the rotating shaft 3 When the fan blades 2 on one side rotate at high speed, the axial force generated may drive the rotating shaft 3 to float or displace in the axial direction. When the rotating shaft 3 floats or displaces and causes at least one rotating shaft groove 34 to be located opposite to at least one retaining ring 35, at least one rotating shaft groove 34 is abutted against the inner shaft hole 350 of at least one or more retaining rings 35, thereby achieving the purpose of limiting the axial floating and displacement of the rotating shaft 3, and can block the axial floating and displacement of the rotating shaft 3, and can effectively prevent the rotating shaft 3 from axially escaping from the outside of at least one bearing 31, at least one oil-containing body 32 and at least one oil retaining cover 33, so that the rotating shaft 3 can rotate stably at the accommodating groove 110 and the accommodating groove 230 of the shaft seat 11.

[0052] In addition, at least one oil retaining cover 33 may be sleeved on the outside of the rotating shaft 3 at the top of at least one oil-containing body 32, and the at least one oil retaining cover 33 is provided with an axial hole 330, and the aperture of the axial hole 330 may be smaller than the outer diameter of the rotating shaft 3 but larger than the inner diameter of the rotating shaft embedding groove 34; furthermore, at least one oil-containing body 32 may be an elastic oil-absorbing sponge or other oil-containing body 32 that may contain lubricating oil, and the oil film on the inner diameter of the oil-containing body 32 after being filled with oil can contact the rotating shaft 3 to fill the gap between the oil-containing body 32 and the rotating shaft 3, and the protective function of at least one oil retaining cover 33 can prevent dust, fine debris or foreign matter such as acid, alkali and salt from the external environment from penetrating between the rotating shaft 3 and the bearing 31, so that the rotating shaft 3 and the bearing 31 can rotate more stably, the friction resistance is not easily increased, and the loss caused by friction can be reduced, etc., which can effectively reduce the noise generated by the rotation between the rotating shaft 3 and the bearing 31, so as to improve the silent effect when the fan is running, and effectively extend the service life of the fan, etc.

[0053] Another fan wheel heat dissipation structure can also achieve the same effect as above. Fig.10 The figure shows a side cross-sectional view of the eighth embodiment of the present invention, which includes a fan frame 1 and a fan blade 2, wherein: the fan frame 1 of the present invention is provided with a storage space 120 extending downward from the shaft seat 11 at the bottom of the accommodating space 10, and a circuit board 42 is provided inside the storage space 120, and a static impeller pressure plate 13 is provided radially outside the storage space 120, and a stator silicon steel sheet group 41 (including a plurality of silicon steel sheets and enameled wire windings, etc.) of the drive unit 4 can be installed on the outside of the shaft seat 11, and the stator silicon steel sheet group 41 extends to the outer side of the shaft seat 11 and is assembled at the fan blade 2, and a shaft bearing seat 24 is provided at the center of the hub 21 accommodating space 210 inside the fan blade 2. In addition, one side of the rotating shaft 3 is plastically embedded in the inner hole of the bearing 31 injected on the bottom frame seat 12, and the other side extends to the inner hole of the bearing 31 in the bearing groove 231 of the rotating shaft bearing seat 24 assembled on the fan blade 2. Then, at least one bearing 31 can be sleeved on the outside of the rotating shaft 3 in the rotating shaft bearing seat 24 and the bearing groove 231, at least one oil-containing body 32 can be sleeved on the at least one bearing 31, and at least one or more oil-containing bodies 32 can be sleeved on the at least one oil-containing body 32. At least one rotating shaft embedding groove 34 corresponding to at least one buckle 35 can be made of elastic plastic material. A wear-resistant gasket 111 can be provided at the bottom of the content groove 1101, that is, the end 37 of one side of the rotating shaft in the accommodating groove 110 can be abutted against the wear-resistant gasket 111.

[0054] Then, when the shaft 3 penetrates at least one oil-containing body 32 and then penetrates the bearing 31 and the retaining ring 35, the outer diameter of the shaft 3 will abut against the periphery of the inner shaft hole 350 of at least one or one retaining ring 35, and at least one retaining ring 35 will be pressed and deformed, causing the inner shaft hole 350 to sink into the accommodating groove 230 along with the shaft 3, and the shaft 3 will penetrate into at least one bearing 31 again, so that at least one shaft embedding groove 34 on the shaft 3 is aligned with at least one retaining ring 35, and the inner shaft hole 350 of at least one retaining ring 35 is subjected to the elastic restoring force, rebounds and embeds into at least one shaft embedding groove 34, and forms a clamping limit; then, when the fan blade 2 on one side of the shaft 3 rotates at high speed or vibrates up and down due to external force, Under the condition that the axial force generated may cause the shaft 3 to float or displace in the axial direction, when the shaft 3 floats or displaces and makes at least one shaft embedding groove 34 correspond to at least one buckle ring 35, at least one shaft embedding groove 34 abuts against the inner shaft hole 350 of at least one or more buckle rings 35, so as to achieve the purpose of limiting the axial floating and displacement of the shaft 3, and can block the axial floating and displacement of the shaft 3, and can effectively prevent the shaft 3 from axially escaping from the outside of at least one bearing 31, at least one oil-containing body 32 and at least one oil-retaining cover 33, and a wear-resistant gasket 111 can be provided at the bottom of the inner groove 1101, that is, a side end 37 of the shaft 3 in the accommodating groove 110 can abut against the wear-resistant gasket 111. A gap is left between the shaft seat 11 on the bottom frame seat 12 and the shaft bearing seat 24 on the fan blade 2 so that the shaft bearing seat 24 on the fan blade 2 can stably rotate at the accommodating groove 110 against the frame seat 12.

[0055] In addition, at least one oil retaining cover 33 may be sleeved on the outside of the rotating shaft 3 at the bottom of at least one oil-containing body 32, and the at least one oil retaining cover 33 may be provided with an axial hole 330, and the aperture of the axial hole 330 may be smaller than the outer diameter of the rotating shaft 3; furthermore, at least one oil-containing body 32 may be an elastic oil-absorbing sponge or other oil-containing body 32 that may contain lubricating oil, and the oil film on the inner diameter of the oil-containing body 32 after being filled with oil may contact the rotating shaft 3 to fill the gap between the oil-containing body 32 and the rotating shaft 3, and the protective function of at least one oil retaining cover 33 may be used to prevent dust, fine debris or foreign matter such as acid, alkali and salt from the external environment from penetrating between the rotating shaft 3 and the bearing 31, so that the rotating shaft 3 and the bearing 31 can rotate more stably, the friction resistance is not easily increased, and the loss caused by friction can be reduced, etc., which can effectively reduce the noise generated by the rotation between the rotating shaft 3 and the bearing 31, so as to improve the silent effect during the operation of the fan, and effectively extend the service life of the fan, etc.

[0056] See also Fig.11 and Fig.12As shown, they are respectively an exploded view and a side cross-sectional view of the ninth embodiment of the present invention. It can be clearly seen from the figures that the present invention is provided with a holding shoulder 102 on the outside of the shaft seat 11 at the bottom of the fan frame 1, and the assembly groove 101 can be used to assemble the bottom cover 113, then the bottom cover 113 is provided with a buckle portion 121 on one side that can be embedded in the buckle shoulder 102 inside the assembly groove 101, so that the bottom cover 113 can be positioned at the assembly groove 101 to position the bearing 31 above the bottom cover 113 so that the bearing 31 does not fall off the shaft seat 11, and the stator silicon steel sheet group 41 of the drive unit 4 is assembled outside the shaft seat 11, and the stator silicon steel sheet group 41 is electrically connected to the bottom of the shaft seat 11 The circuit board 42 of the part can be used for assembling one side of the rotating shaft 3 at the fan blade 2 and extending the other side to the bearing 31 in the accommodating groove 110 assembled inside the shaft seat 11 of the fan frame 1, and for assembling the rotor magnet 43 on the inner side of the fan blade 2 to be located on the outer side of the stator silicon steel sheet group 41, and the outer side of the rotating shaft 3 located in the accommodating groove 110 can be sleeved with at least one bearing 31, at least one oil-containing body 32 stacked on at least one bearing 31, and at least one oil-retaining cover 33 stacked on at least one oil-containing body 32, and at least one rotating shaft embedding groove 34 is provided on the outer side of the rotating shaft 3, the oil-retaining cover can be in the shape of a letter "ㄇ", and the at least one oil-retaining cover 33 can be made of elastic plastic material. That is, at least one retaining ring 35 is assembled at the corresponding at least one shaft embedding groove 34, and then a heightening gasket 351 is placed between the bottom of the at least one retaining ring 35 and the bearing 31. The retaining ring 35 is provided with an inner shaft hole 350, and the heightening gasket 351 is provided with an inner ring hole 3510. The diameter of the inner shaft hole 350 is larger than the inner diameter of the shaft embedding groove 34 and smaller than the outer diameter of the shaft 3. The diameter of the inner ring hole 3510 is larger than the outer diameter of the shaft 3. When the shaft 3 penetrates the at least one oil-containing body 32 and then penetrates the retaining ring 35 and the heightening gasket 351, the outer diameter of the shaft 3 will abut against the inner shaft hole 350 of at least one or one retaining ring 35. 50 periphery, and at least one retaining ring 35 is pressed and deformed, causing the inner shaft hole 350 to be pressed along with the rotating shaft 3 and sink into the inner ring hole 3510 of the height-increasing gasket 351, and the rotating shaft 3 is then inserted into at least one bearing 31, so that at least one rotating shaft embedding groove 34 on the rotating shaft 3 is aligned with at least one retaining ring 35, the inner shaft hole 350 of at least one retaining ring 35 is acted upon by the elastic restoring force, rebounds and embeds into at least one rotating shaft embedding groove 34, and forms a clamping limit; then, when the fan blades 2 on one side of the rotating shaft 3 rotate at high speed or vibrate up and down due to external force, the axial force generated will not cause the rotating shaft 3 to float or displace along the axial direction. It can block the axial floating and displacement of the rotating shaft 3, and can effectively prevent the rotating shaft 3 from axially escaping from the outside of at least one bearing 31, at least one oil-containing body 32 and at least one oil retaining cover 33. A gap is left between the inner hole of the bearing 31 of the shaft seat 11 and the rotating shaft 3 on the fan blade 2 so that the rotating shaft 3 on the fan blade 2 can stably rotate in the bearing in the accommodating groove 110.

[0057] The above description is only a preferred embodiment of the present invention, and does not limit the protection scope of the present invention. Therefore, all simple modifications and equivalent structural changes made by using the contents of the present invention description and drawings should be included in the protection scope of the present invention.

Claims

1. A fan shaft structure, comprising a fan frame, fan blades, a shaft and a drive unit, characterized in that: The fan frame has an accommodating space inside, and an axle seat with an accommodating groove is convexly arranged in the accommodating space, and the stator silicon steel sheet group and the circuit board of the driving unit are installed outside the axle seat; The fan blade is assembled in the accommodating space of the fan frame, and a rotor magnet is provided on the inner side of the fan blade hub and is located relatively outside the stator silicon steel sheet group; and One side of the rotating shaft is assembled at the fan blade, and the other side extends to the accommodating groove of the shaft seat assembled on the fan frame, and the rotating shaft is located in the accommodating groove and is sleeved with at least one bearing, at least one oil-containing body stacked between at least one of the bearings and the fan blade, and at least one oil retaining cover stacked on at least one of the oil-containing bodies, and a gap is left between the bearing hole and the rotating shaft to allow the rotating shaft of the fan blade to run smoothly in the bearing.

2. The fan shaft structure according to claim 1, characterized in that: At least one of the oil-containing bodies sleeved on the outside of the rotating shaft is an elastic oil-absorbing sponge, and the oil film of the oil-containing body after being filled with oil can contact the rotating shaft, and at least one oil-retaining cover is stacked on at least one of the oil-containing bodies, wherein at least one of the oil-retaining covers is provided with a buckle ring below, and the buckle ring is sleeved in the embedding groove of the rotating shaft, or the oil-retaining cover is provided with an axial hole with a hole diameter smaller than the outer diameter of the rotating shaft, and the axial hole is sleeved in the embedding groove of the rotating shaft, and the oil-retaining cover is in the shape of "I" or "N".

3. The fan shaft structure according to claim 1, characterized in that: At least one bearing is sleeved on the outside of the rotating shaft and is made of copper or plastic with a hardness of less than 50HV. The shape of the bearing is cylindrical or U-shaped alone or both cylindrical and U-shaped.

4. The fan shaft structure according to claim 1, characterized in that: The shaft is externally sleeved with at least one bearing made of composite plastic material with a hardness of less than 50 HV, self-lubricating properties, a friction coefficient of less than 0.3, non-conductive, and a temperature resistance of more than 100 degrees Celsius. The bearing shape is cylindrical or U-shaped alone, or both cylindrical and U-shaped.

5. The fan shaft structure according to claim 1, characterized in that: At least one bearing is sleeved on the outside of the rotating shaft and a bottom cover is arranged under the bearing, and the bottom cover is combined with the fan frame in an interference tight fit or an embedded buckle fastening manner.

6. The fan shaft structure according to claim 1, characterized in that: The shaft seat is provided with a receiving space extending downward, and a static impeller pressure plate is extended radially outward of the receiving space.

7. A fan shaft structure, comprising a fan frame, fan blades, a shaft and a drive unit, characterized in that: The fan frame has an accommodation space inside, and an axle seat with an accommodation groove is convexly arranged in the accommodation space, a rotating shaft is arranged in the axle seat, and a stator silicon steel sheet group and a circuit board of a driving unit are installed outside the axle seat; The fan blade includes a hub with a accommodating space, an iron shell is provided on the outer ring of the accommodating space, a rotor magnet is provided on the inner side of the iron shell and is relatively located outside the stator silicon steel sheet group, a rotating shaft seat with a accommodating groove is provided in the center of the accommodating space, at least one bearing is provided in the accommodating groove of the rotating shaft seat, at least one oil-containing body is stacked between at least one bearing and the bottom of the fan blade, and at least one oil-containing cover is stacked under at least one of the oil-containing bodies, one side of the rotating shaft seat is connected to the center of the fan blade, and the other side extends to the accommodating groove of the shaft seat assembled in the fan frame, a gap is left between the rotating shaft seat and the accommodating groove, and a gap is left between the bearing hole in the rotating shaft seat and the rotating shaft in the accommodating groove, so that the rotating shaft seat of the fan blade can rotate freely and smoothly in the accommodating groove of the fan frame.

8. The fan shaft structure according to claim 7, characterized in that: At least one of the oil retaining caps is provided with an axial hole whose hole diameter is smaller than the outer diameter of the rotating shaft, and is stacked under at least one of the oil-containing bodies. A buckle ring is provided under at least one of the oil retaining caps, and the buckle ring is sleeved in the embedding groove of the rotating shaft, or the oil retaining cap is provided with an axial hole whose hole diameter is smaller than the outer diameter of the rotating shaft, and the axial hole is sleeved in the embedding groove of the rotating shaft. The oil retaining cap is in the shape of an "I" or an "N".

9. The fan shaft structure according to claim 7, characterized in that: At least one bearing is sleeved on the outside of the rotating shaft and includes copper material or plastic material with a hardness of less than 50HV. The shape of the bearing can be cylindrical or U-shaped alone or both cylindrical and U-shaped.

10. The fan shaft structure according to claim 7, characterized in that: The shaft is externally sleeved with at least one bearing made of composite plastic material with a hardness of less than 50HV, self-lubricating properties, a friction coefficient of less than 0.3, non-conductive, and a temperature resistance of more than 100 degrees Celsius. The bearing shape can be cylindrical or U-shaped alone, or both cylindrical and U-shaped.

11. The fan shaft structure according to claim 7, characterized in that: The shaft seat is provided with a receiving space extending downward, and a static impeller pressure plate is extended radially outward of the receiving space.

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