TWM243586U - Integral structure design for pneumatic bearing - Google Patents

Description

M243586 V. Creation Description (1) [Technical Field to which the New Type belongs] This creation relates to a bearing for supporting a rotating shaft of a computer cooling fan. [Prior art]

The bearings generally used to combine with the computer cooling fan shaft mainly include sliding bearings and ball bearings. The fourth figure shows the structure of a conventional sliding bearing, which includes an inner bearing A and an outer shaft sleeve B, and the inner and outer bearings A and an outer shaft sleeve B are bonded and fixed with glue; the inner wall surface of the inner bearing A is filled with lubricant Then, the rotating shaft S is combined in the inner bearing A, so that an oil film is formed between the rotating shaft S and the inner wall surface of the inner bearing A. When the rotating shaft S rotates, the oil film between the rotating shaft S and the inner bearing A is used as a medium with low friction resistance to achieve the purposes of stable rotation and reduction of vibration and noise. However, after all, the sliding bearing belongs to a sliding fit structure. When the running speed is too fast, high temperature will still be generated. Under long-term use, it will easily deteriorate the lubricating oil and even produce impurities, which will cause the bearing to run erratically or get stuck, causing damage to the application. The second disadvantage is that because of the use of lubricants, oil seals must be designed to prevent lubricants from leaking out, and dust caps must be installed to prevent dust and impurities from entering the bearings and causing component wear, which will increase production and assembly costs.

The third disadvantage is that oil seals and dust caps often have the effect of not being able to reliably seal the lubricant and prevent dust, resulting in oil leakage and bearing wear. The fifth picture shows that when a general ball bearing C is used, the ball bearing C must be arranged inside the sleeve D, and the rotary shaft S is arranged in the ball bearing C; the ball bearing C is used as the space between the rotary shaft and the sleeve Relatively rotating media, by rolling the ball

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In addition, ball bearings have dust caps, so they still generate less friction to distinguish them from plain bearings. In addition, the use of lubricating oil is still required; in some cases, the shortcomings of sliding cymbals also exist. [New content] "Technical problem to be solved" The first problem to be solved in this creation is that the white man must be made of soil, 疋 白 夭 0 sliding or ball bearings, inner bearings and outer sleeves, resulting in a structure The car is too gg horse complicated by the outer plate, and because the inner and outer shaft sleeves must be glued together, π n is not easy, the combined strength is less than 6, and the soil # λ is produced, and the installation and manufacturing are relatively ΘΒ mouth. Insufficient extinction can easily cause problems ... The second problem that this creation wants to solve is the higher manufacturing cost. It is easy to deteriorate the lubricant under long-term use. It is known that sliding or ball bearings are not running smoothly or are stuck, causing application parts. ^ As far as the generation of impurities, the third question that the bearing wants to solve is bad. The bearing must design components such as oil seals and dust caps. It is known that the use of lubricating oil to contaminate bearing parts will increase production publicity, prevent lubricant leakage, and the fourth and most expensive installation cost to be solved in gray text creation. problem. Bearing, the oil seal and the dust cover may cause a problem, which is the lack of poor sealing of the shaft that is conventionally used with lubricating oil. "Technical means to solve the problem" The gas dynamic pressure method provided by this creation produced a bearing set. Based on the technical means, it was integrated with the outer sleeve to make the structure more complicated. Bearing '% is missing. The technical means of this creation,

M243586 V. Creation instructions (3) A herringbone groove with a depth of 12 micrometers (// m) or more is machined on the inner wall surfaces of both ends of the center hole provided in the bearing body. The center hole is used to combine light load components (Such as a computer cooling fan); when the shaft rotates at a high speed, it can drive the air around the shaft to rotate, causing a gas vortex between the shaft and the inner wall of the bearing. The gas vortex forms a space between the shaft and the inner wall of the center hole. A uniform, stable and powerful air pressure film. This air pressure film suspends the rotating shaft in the center of the full flow of gas and rotates stably without collision and friction with the inner wall of the bearing. Concave spaces are provided on the other thing and the body at both ends of the central hole, and the air can provide convection in the herringbone groove smoothly. For the prior art and knowledge axis, the creation of this creation should be more traditional to avoid transmission, the quality of the creation, even the damage of the parts, the seal and dust of the creation, and the phenomenon of oil and gas. "Results", this pressure bearing must generally be manufactured more internally, bearing quality, and guidance. Bearing components can be compared due to the effect of technology. Bearings are simpler and more compact. They have the following advantages: The one-piece manufacturing method does not need to combine the inner bearing and the outer sleeve, so it is easy, the cost is reduced, and the outer sleeve may fall off. In order to avoid the use of lubricating oil, the absence of lubricating oil will cause the bearings to run erratically or become stuck. As a result, the use of lubricating oil is not required, so it is not necessary to design the oil to save production and assembly costs. Because no lubricant is used, there are no common leaks

Page 7 M243586 V. Creation instructions (4) V. The air pressure film formed by the gas vortex of the gas dynamic pressure bearing between the rotating shaft and the inner wall of the bearing will maintain very low friction between the rotating shaft and the bearing, and has Mute effect. 6. The air pressure film formed by the gas vortex of the gas dynamic pressure bearing between the rotating shaft and the inner wall of the bearing will suspend the rotating shaft in the center of the full flow of the gas and rotate stably without colliding with the inner wall of the bearing, so it can reduce vibration at the same time. Increase the rotation speed of the shaft. 7. The gas dynamic pressure bearing of this creation is made by one-piece molding, so the overall structure is relatively strong, and it is easy to manufacture, which can reduce the manufacturing cost. [Embodiment] With the illustrations for further explanation, the technical characteristics of this creation will be more clearly understood; the first and second figures respectively show the three-dimensional sectional view and the plan sectional view of the structure of the gas dynamic pressure bearing of this creation. As can be understood from the figures shown in the first and second figures, the gas dynamic pressure bearing of this creation is a one-piece structure. Its structural feature is that a central hole 11 is provided in the bearing body 1 for combining the rotating shaft. Recessed spaces 13 of varying depths are respectively provided at both ends of the holes 11. A part of the inner wall surface at the opposite ends of the central hole 11 is provided with a herringbone groove 12 having a depth of 12 micrometers (// m) or more. A concave ring portion 14 is provided on an outer diameter of one end of the bearing body 1. The gas dynamic pressure bearing of the present invention is manufactured in an integrated manner, so there is no need to assemble the existing defects such as the traditional sliding bearing or ball bearing with the sleeve. The application of the gas dynamic pressure bearing of this creation is shown in the second figure, which is beneficial

M243586 V. Creation instructions (5) Use the concave ring portion 14 to fit and fix to other objects (such as the fixing element attached to the motherboard); and the rotating shaft 2 directly penetrates the center hole 11. When the rotating shaft 2 rotates at high speed, it will drive the air around the rotating shaft 2 to rotate, and then guide the air in the concave space 13 at both ends into the center hole 11 to make the air flow in each of the herringbone grooves 12. ; When the rotating air hits the chevron groove 12 of the inner wall of the center hole 11 of the bearing body 1, the air will cause a gas vortex between the shaft 2 and the inner wall of the center hole 11 and the gas vortex will then be on the shaft 2 A uniform, stable and strong air pressure film is formed between the inner wall of the center hole 11 and the air pressure film. This air pressure film will suspend the rotating shaft 2 in the center of the gas vortex and stably rotate, and will not collide with the center hole 11 of the bearing body 1. The herringbone grooves 12 are provided at the upper and lower ends of the central hole 11 of the gas dynamic pressure bearing 1 at about 1/3, and the herringbone grooves 12 are provided symmetrically to the circumference of the inner wall. In this way, a pneumatic film with a desired effect can be formed between the rotating shaft 2 and the inner wall of the center hole 11, so the middle section of the center hole 11 is not provided with a herringbone groove 12 to save processing costs. The third figure is a partial enlarged view of the herringbone groove 12 on the inner wall surface of the center hole 11 of the gas dynamic pressure bearing 1 of this creation, and the depth of the herringbone groove 12 is 12 microns (// m) Above, the width is about 100 microns (// m). If the depth of the herringbone groove 12 is less than 8 micrometers (μm), the gas vortex caused between the shaft 2 and the inner wall of the central hole will be insufficient in strength, so the gas pressure film formed between the shaft 2 and the inner wall 11 will also be insufficient. Insufficient strength and non-uniform stability, so the rotating shaft 2 cannot be suspended in the center of the gas vortex and stably rotates, and will collide with the central hole 11 of the gas dynamic pressure bearing 1 and lose the replacement between the normal rotating shaft and the bearing Function of lubricating oil film. Therefore, the herringbone groove 12 with a depth of more than 12 microns (// m) is the original creation.

M243586 V. Creation instructions (6) Special design of gas dynamic pressure bearing 1. The rotating shaft 2 passes through the central hole 11 of the bearing body 1; two ends of the rotating shaft 2 are an output end and an input end, respectively. This input terminal is connected to a motor to drive the rotating shaft 2 to rotate, and the output terminal can be combined with a fan 'to make the fan rotate. The above are only for explaining the preferred embodiment of this creation, and are not intended to limit the creation in any form. Any modification of the creation in the same spirit of creation Or 'change' should still be included in the scope of protection of this creative intention.

Page 10 M243586 Brief Description of Drawings The first drawing is a three-dimensional sectional view showing the structure of the gas dynamic pressure bearing of this creation. The second figure is a plan cross-sectional view showing the structure of the gas dynamic pressure bearing and the combination with the rotating shaft of the present invention. The third figure is a partial enlarged view showing the herringbone groove on the inner wall of the center hole of the gas dynamic pressure bearing of this creation. The fourth figure is a plan sectional view showing a conventional sliding bearing structure. The fifth figure is a plan sectional view showing the structure of a conventional ball bearing with a shaft sleeve and a rotating shaft. [Description of component symbols] (1) Bearing body (1 1) Center hole (1 2) Herringbone groove (13) Recessed space (14) Concave ring (2) Rotary shaft (A) Inner bearing (B) Outer shaft Sleeve (C) ball bearing (D) sleeve (S) shaft

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Claims (1)

M243586 6. Scope of patent application 1. An integrated structure design of a gas dynamic pressure bearing is provided with a central hole in a bearing body in an integral molding manner, and herringbone grooves are provided at both ends of the inner wall surface of the central hole.